WO2024255046A1 - 电池单体、电池及用电装置 - Google Patents

电池单体、电池及用电装置 Download PDF

Info

Publication number
WO2024255046A1
WO2024255046A1 PCT/CN2023/125422 CN2023125422W WO2024255046A1 WO 2024255046 A1 WO2024255046 A1 WO 2024255046A1 CN 2023125422 W CN2023125422 W CN 2023125422W WO 2024255046 A1 WO2024255046 A1 WO 2024255046A1
Authority
WO
WIPO (PCT)
Prior art keywords
groove
shielding member
battery cell
way valve
wall portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/125422
Other languages
English (en)
French (fr)
Inventor
吴凯
邢承友
陈新祥
李全坤
王鹏
郑于炼
金海族
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to KR1020267000923A priority Critical patent/KR20260021066A/ko
Priority to EP23941270.3A priority patent/EP4730531A1/en
Priority to JP2025563752A priority patent/JP2026515925A/ja
Publication of WO2024255046A1 publication Critical patent/WO2024255046A1/zh
Priority to US19/370,811 priority patent/US20260051643A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/358—External gas exhaust passages located on the battery cover or case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery cell, a battery and an electrical device.
  • a pressure relief mechanism for releasing the internal pressure of the battery cells is generally provided on the outer shell of the battery cells, so that when the internal pressure or temperature of the battery cells reaches a threshold value, the pressure relief mechanism can be activated and release the internal pressure of the battery cells.
  • the pressure relief mechanism of the existing battery cells may be activated and release the pressure in advance during use, resulting in poor stability in the use of the battery cells, which is not conducive to improving the service life and reliability of the battery cells.
  • the embodiments of the present application provide a battery cell, a battery, and an electrical device, which can effectively improve the service life and reliability of the battery cell.
  • an embodiment of the present application provides a battery cell, comprising a shell, an electrode assembly, a one-way valve and a shielding member; the shell has a wall portion; the electrode assembly is accommodated in the shell; the one-way valve is arranged on the wall portion, and the one-way valve has an outlet, and the outlet is used to discharge the gas inside the shell; the shielding member is installed on the wall portion, along the thickness direction of the wall portion, the shielding member is located on the side of the one-way valve away from the electrode assembly, and the shielding member covers the one-way valve, and an exhaust channel is formed between the shielding member and the wall portion, and the exhaust channel connects the outlet and the outside of the shell.
  • a one-way valve is arranged on the wall of the outer shell so that the one-way valve can be opened in one direction and discharge the gas inside the outer shell to the outside of the outer shell. Therefore, when gas is generated inside the outer shell during normal use of the battery cell, it can be discharged to the outside of the outer shell through the one-way valve to alleviate the phenomenon that the internal pressure of the battery cell reaches the threshold value prematurely due to the increase in the internal air pressure of the battery cell, thereby effectively improving the use stability of the battery cell, thereby improving the service life and reliability of the battery cell.
  • the covering member can play a certain protective and shielding role on the one-way valve.
  • it can reduce the wear or damage of the one-way valve in the external environment, and can reduce the risk of impurities or particulate matter in the external environment entering the one-way valve, which is beneficial to increasing the service life of the one-way valve.
  • covering the one-way valve by the covering member can enhance the aesthetics of the outer surface of the battery cell.
  • it is convenient to connect other components such as the detection element on the side of the covering member away from the one-way valve, so as to reduce the interference of the area where the one-way valve is provided on the wall on the connection detection element and other components.
  • the wall portion has a first surface facing away from the electrode assembly, the first surface is provided with a mounting groove, the bottom surface of the mounting groove is provided with a mounting hole, at least a portion of the one-way valve is disposed in the mounting hole, and at least a portion of the shielding member is accommodated in the mounting groove.
  • the mounting groove can play a certain positioning and limiting role for the shielding member, which is beneficial to reducing the difficulty of assembling the shielding member connected to the wall portion.
  • the exhaust channel includes a first exhaust gap, the first exhaust gap is formed between the shielding member and a groove side surface of the mounting groove, and the first exhaust gap is used to connect the air outlet and the outside of the housing.
  • a first exhaust gap connected to the outside of the shell is formed between the shielding member and the side surface of the mounting groove, so that the gas discharged from the one-way valve can be discharged to the outside of the shell through the first exhaust gap.
  • the battery cell adopting this structure does not need to have a hole on the shielding member, which is beneficial to reduce the processing difficulty and can improve the appearance of the battery cell.
  • the outer peripheral surface of the shielding member includes a first corner surface and at least two first side surfaces, and the first corner surface connects two adjacent first side surfaces;
  • the groove side surface of the mounting groove includes a second corner surface and at least two second side surfaces, and the second corner surface connects two adjacent second side surfaces, each second side surface is connected to one first side surface, and the first exhaust gap is formed between the second corner surface and the first corner surface.
  • first side surfaces in the outer peripheral surface of the shielding member are connected by a first corner surface
  • second side surfaces in the groove side surface of the mounting groove are connected by a second corner surface
  • each first side surface is connected to a second side surface
  • a first gap is formed between the first corner surface and the second corner surface, that is, a first exhaust gap is formed at the corner of the shielding member and the mounting groove.
  • both the first corner surface and the second corner surface are arc surfaces, and the radius of the first corner surface is greater than the radius of the second corner surface.
  • first corner surface and the second corner surface as arc surfaces, and the radius of the first corner surface is larger than the radius of the second corner surface, a first exhaust gap is formed between the first corner surface and the second corner surface.
  • the first side surface is connected to the second side surface by welding.
  • the cross-section of the shielding member in a direction perpendicular to the thickness of the wall portion is rectangular, and the outer peripheral surface of the shielding member includes four first side surfaces and four first corner surfaces, and the first exhaust gap is formed at at least one of the first corner surfaces.
  • the shielding member as a rectangular plate structure, the four sides of the shielding member form four first side surfaces, and four first corner surfaces are formed at four right angles of the shielding member, the structure is simple and easy to manufacture.
  • a groove is disposed on the outer peripheral surface of the shielding member, and the first exhaust gap is formed between the groove bottom surface of the groove and the groove side surface of the mounting groove.
  • a groove is provided on the outer peripheral surface of the shielding member so that a first exhaust gap for exhaust is formed between the groove bottom surface of the groove and the groove side surface of the mounting groove.
  • an area of the outer circumferential surface of the shielding member where the groove is not provided is welded to a groove side surface of the installation groove.
  • the shielding member is connected to the side surface of the mounting groove by welding the area on the outer peripheral surface of the shielding member where no groove is provided to the side surface of the mounting groove.
  • the battery cell with such a structure is beneficial to the firmness of the connection between the shielding member and the wall portion, so as to improve the structural stability of the shielding member assembled to the wall portion.
  • a plurality of protrusions are convexly provided on the outer circumferential surface of the shielding member, and the plurality of protrusions are arranged at intervals along the circumference of the shielding member.
  • the protrusions abut against the side surfaces of the mounting groove, and the first exhaust gap is formed between the area of the outer circumferential surface of the shielding member where the protrusions are not provided and the side surfaces of the mounting groove.
  • a plurality of protrusions arranged at intervals along the circumference of the shielding member are provided on the outer peripheral surface of the shielding member, and the protrusions abut against the side surfaces of the mounting groove, so that a first exhaust gap for exhaust is formed between the area on the outer peripheral surface of the shielding member where no protrusions are provided and the side surfaces of the mounting groove. That is to say, the first exhaust gap is located between two adjacent protrusions, and the structure is simple and easy to assemble.
  • the protrusion is interference fit with a groove side surface of the mounting groove.
  • the shielding member is fixed in the mounting groove by interference fit between the convex portion protruding from the outer peripheral surface of the shielding member and the groove side surface of the mounting groove.
  • the battery cell adopting this structure can form a first exhaust gap between two adjacent convex portions while facilitating the installation of the shielding member on the wall portion, which helps to reduce the difficulty of assembling the shielding member.
  • the exhaust channel further includes a second exhaust gap, the second exhaust gap is formed between the shielding member and the bottom surface of the mounting groove, and the second exhaust gap connects the first exhaust gap and the air outlet.
  • the exhaust channel also includes a second exhaust gap formed between the covering member and the bottom surface of the mounting groove, and the second exhaust gap connects the first exhaust gap and the air outlet to alleviate the phenomenon of exhaust obstruction between the air outlet and the first exhaust gap caused by the covering member abutting against the bottom surface of the mounting groove, thereby improving the smoothness of gas discharge from the air outlet of the one-way valve to the first exhaust gap.
  • the shielding member has a second surface facing the one-way valve, the second surface overlaps the bottom surface of the mounting groove, the second surface is provided with a first groove, and the second exhaust gap is formed between the bottom surface of the first groove and the bottom surface of the mounting groove.
  • the second surface of the shielding member is overlapped on the bottom surface of the mounting groove so that the shielding member is against the bottom surface of the mounting groove, so as to improve the structural stability and reliability of the shielding member installed in the mounting groove.
  • a first groove is provided on the second surface so that a second exhaust gap is formed between the bottom surface of the first groove and the bottom surface of the mounting groove, so that the gas discharged from the outlet of the one-way valve can enter the first exhaust gap through the first groove and then be discharged to the outside of the shell, so that the first exhaust gap and the outlet can be connected through the first groove while the shielding member is against the bottom surface of the mounting groove.
  • a plurality of first exhaust gaps are formed between the shielding member and the side surface of the mounting groove, and the plurality of first exhaust gaps are arranged at intervals along the circumference of the shielding member.
  • a plurality of first grooves are provided on the second surface, and each first exhaust gap is connected to one of the first grooves.
  • a plurality of first exhaust gaps are formed between the shielding member and the groove side surface of the mounting groove, and each first exhaust gap is connected to a first groove, thereby facilitating further improving the exhaust efficiency.
  • the second surface is further provided with a second groove, a plurality of the first grooves are arranged around the second groove and are all connected to the second groove, and the second groove is connected to the air outlet.
  • a second groove is provided on the second surface of the shielding member facing the one-way valve, the second groove is connected to the air outlet of the one-way valve, and a plurality of first grooves are provided around the second groove and are connected to the second groove, so that the gas discharged from the air outlet of the one-way valve can enter the second groove and then pass through the plurality of first grooves and then respectively pass through the corresponding first exhaust gaps to be discharged to the outside of the outer shell, which is beneficial to improving the exhaust efficiency and can alleviate the phenomenon of gas accumulation between the shielding member and the one-way valve.
  • the gas outlet is arranged at an end of the one-way valve away from the electrode assembly, the gas outlet is arranged facing the second groove, and the projection of the gas outlet is located in the second groove.
  • the air outlet of the one-way valve and the second groove are arranged to face each other, and the projection of the air outlet in the thickness direction of the wall is located in the second groove, so that the second groove is a structure covering the air outlet in the thickness direction of the wall, so that the gas discharged from the air outlet of the one-way valve can directly enter the second groove, which is beneficial to improving the exhaust smoothness and exhaust efficiency.
  • the shielding member does not extend beyond the first surface.
  • the shielding member by setting the shielding member not to exceed the first surface of the wall away from the electrode assembly in the thickness direction of the wall, the shielding member can be protected to a certain extent by the installation groove, so as to further reduce the wear of the shielding member.
  • the shielding member has a third surface facing away from the one-way valve, and the third surface is flush with the first surface.
  • the third surface of the shielding member facing away from the one-way valve and the first surface of the wall portion facing away from the electrode assembly are arranged to be parallel to each other.
  • the neat structure is beneficial to further improve the aesthetics of the outer surface of the battery cell, and is convenient for setting information codes or connecting other components such as detection elements on the third surface of the shielding member.
  • the one-way valve does not extend beyond the bottom surface of the mounting groove.
  • the one-way valve is arranged so as not to exceed the bottom surface of the mounting groove in the thickness direction of the wall, that is, the one-way valve arranged in the mounting hole does not extend into the mounting groove, thereby reducing the interference between the one-way valve and the covering member arranged in the mounting groove and facilitating the exhaust of the one-way valve.
  • the shielding member is fixedly connected to the wall portion.
  • the shielding member as a structure fixedly connected to the wall portion, it is helpful to reduce the risk of the shielding member detaching from the wall portion during use, and can improve the firmness of the connection between the shielding member and the wall portion, so as to facilitate setting information codes on the shielding member or connecting other components such as detection elements.
  • the one-way valve includes a valve body, an elastic member and a blocking member;
  • the valve body is arranged on the wall portion, an installation cavity is formed inside the valve body, an air inlet and the air outlet are arranged on the valve body, the air inlet is used to connect the installation cavity with the interior of the outer shell, and the air outlet is used to connect the installation cavity with the exhaust channel;
  • the elastic member is arranged in the installation cavity;
  • the blocking member is movably arranged in the installation cavity, the blocking member is used to block the air inlet under the action of the elastic member, and is used to open the air inlet under the action of the gas inside the outer shell.
  • the one-way valve is provided with a valve body, an elastic member and a sealing member.
  • the valve body is arranged on the wall portion, and the valve body is provided with an air inlet connecting the installation cavity and the inside of the shell, and an air outlet connecting the installation cavity and the exhaust channel.
  • the elastic member can apply elastic force to the sealing member, so that the sealing member can block the air inlet to prevent the gas outside the shell from entering the inside of the shell, and when the pressure inside the shell rises, the gas inside the shell can act on the sealing member and overcome the elastic force of the elastic member, so that the sealing member can open the air inlet, thereby allowing the gas inside the shell to be discharged after the one-way opening of the one-way valve, so as to realize the one-way exhaust function of the one-way valve.
  • the valve body includes a valve body and a valve cover; the valve body is arranged on the wall portion, and the valve body is provided with the air inlet; along the thickness direction of the wall portion, the valve cover is arranged at one end of the valve body away from the electrode assembly, the valve cover and the valve body together enclose the installation cavity, and the valve cover is provided with the air outlet.
  • the valve body of the one-way valve includes a valve body and a valve cover.
  • the valve cover is connected to the end of the valve body away from the electrode assembly in the thickness direction of the wall so that the valve cover and the valve body jointly define an installation cavity for accommodating the elastic part and the sealing part.
  • the one-way valve with this structure is configured with the valve body as two parts, thereby facilitating the assembly of the elastic part and the sealing part into the installation cavity, which helps to reduce the difficulty of assembling the one-way valve.
  • the valve cover and the sealing member are spaced apart, two ends of the elastic member are respectively against the valve cover and the sealing member, and the air inlet is arranged on the bottom surface of the installation cavity.
  • valve cover and the sealing member are arranged in a structure spaced apart along the thickness direction of the wall, so that the two ends of the elastic member can respectively abut against the valve cover and the sealing member, so that the sealing member can seal the air inlet arranged on the bottom surface of the installation cavity along the thickness direction of the wall under the action of the elastic member. That is to say, the air inlet is arranged at the end of the valve body facing the electrode assembly in the thickness direction of the wall, and the sealing member can move along the thickness direction of the wall and seal the air inlet under the action of the elastic member.
  • the one-way valve with this structure makes it easy for the elastic member to apply elastic force to the sealing member so that the sealing member blocks the air inlet, and can reduce the difficulty of assembling the elastic member.
  • the installation cavity penetrates one end of the valve body away from the electrode assembly and forms the gas outlet, and the shielding member is arranged facing the gas outlet.
  • the installation cavity is set to pass through the end of the valve body away from the electrode assembly in the thickness direction of the wall to form an air outlet at the end of the valve body away from the electrode assembly, and the air outlet is covered by a covering member.
  • the one-way valve with this structure facilitates the assembly of the elastic member and the sealing member into the installation cavity through the air inlet, which helps to reduce the difficulty of assembling the one-way valve.
  • the shielding member and the blocking member are spaced apart, two ends of the elastic member are respectively against the shielding member and the blocking member, and the air inlet is arranged on the bottom surface of the installation cavity.
  • the blocking member and the blocking member are spaced apart in the thickness direction of the wall so that the two ends of the elastic member can respectively abut against the blocking member and the blocking member, so that the blocking member can block the air inlet arranged on the bottom surface of the installation cavity along the thickness direction of the wall under the action of the elastic member. That is to say, the air inlet is arranged at the end of the valve body facing the electrode assembly in the thickness direction of the wall, and the blocking member can move along the thickness direction of the wall and block the air inlet under the action of the elastic member.
  • the one-way valve with this structure makes it easy for the elastic member to apply elastic force to the blocking member so that the blocking member blocks the air inlet, and can reduce the difficulty of assembling the elastic member.
  • the material of the shielding member is the same as that of the wall portion.
  • the shielding member and the wall portion are structures of the same material, on the one hand, it is convenient to assemble the shielding member and the wall portion of the same material to each other, which is beneficial to reduce the difficulty of assembling the shielding member on the wall portion; on the other hand, the appearance of the shielding member and the wall portion can be made the same, which is beneficial to improve the aesthetic appearance of the battery cell.
  • the outer shell includes a shell and an end cover; the interior of the shell forms a accommodating cavity with an opening, and the accommodating cavity is used to accommodate the electrode assembly; the end cover closes the opening; wherein the end cover is the wall portion; or, the shell includes the wall portion.
  • the battery cell with this structure is easy to install the one-way valve and the shielding member on the end cover, which is conducive to reducing the difficulty of assembling the battery cell and improving the production efficiency of the battery cell.
  • the battery cell with this structure can reduce the influence of the stress generated when the end cover and the shell are connected to each other on the one-way valve and the shielding member, so as to alleviate the phenomenon of damage to the one-way valve or failure of the shielding member connection, thereby improving the stability and service life of the battery cell.
  • an embodiment of the present application further provides a battery, comprising the above-mentioned battery cell.
  • an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery cell, wherein the battery cell is used to provide electrical energy.
  • FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.
  • FIG2 is an exploded view of a battery structure provided in some embodiments of the present application.
  • FIG3 is a schematic diagram of the structure of a battery cell provided in some embodiments of the present application.
  • FIG4 is an exploded view of the structure of a battery cell provided in some embodiments of the present application.
  • FIG5 is a partial cross-sectional view of a battery cell provided in some embodiments of the present application.
  • FIG6 is a schematic diagram of the structure of a one-way valve provided in some embodiments of the present application.
  • FIG. 7 is a top view of a battery cell provided in some embodiments of the present application.
  • FIG8 is a partial enlarged view of the battery cell A shown in FIG7;
  • FIG9 is a schematic diagram of the structure of a shielding member provided in some embodiments of the present application.
  • FIG10 is a schematic diagram of the structure of shielding members provided in some other embodiments of the present application.
  • FIG11 is a schematic structural diagram of shielding members provided in some other embodiments of the present application.
  • FIG12 is a bottom view of a shielding member provided in some embodiments of the present application.
  • FIG13 is an exploded view of a one-way valve provided in some embodiments of the present application.
  • FIG14 is a cross-sectional view of a one-way valve provided in some embodiments of the present application.
  • FIG15 is a partial cross-sectional view of a battery cell provided in some other embodiments of the present application.
  • FIG16 is a partial cross-sectional view of a wall portion of a housing of a battery cell provided in some embodiments of the present application.
  • FIG. 17 is a partial cross-sectional view of an insulating member provided in some embodiments of the present application.
  • Icon 1000-vehicle; 100-battery; 10-box; 11-first box body; 12-second box body; 20-battery cell; 21-housing; 211-wall; 2111-mounting hole; 2111a-first hole section; 2111b-second hole section; 2112-first surface; 2113-mounting groove; 2113a-second corner surface; 2113b-second side surface; 212-housing; 2121-opening; 213-end cover; 22-electrode assembly; 221-ear; 23-check valve; 231-air outlet; 232-valve body; 2321-mounting cavity; 2322-air inlet; 2323-valve body; 2323a-sinking groove; 2323b-connecting part; 2323c-stress relief groove; 2324-valve cover; 2324a-second A guide column; 233-elastic member; 234-blocking member; 2341-second guide column; 2342-pressing portion; 2342a-clamping groove; 2343-se
  • the terms “installed”, “connected”, “connected”, and “attached” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • the battery cell may be a secondary battery.
  • a secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.
  • the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.
  • a battery cell generally includes an electrode assembly.
  • the electrode assembly includes a positive electrode, a negative electrode, and a separator.
  • active ions Ions such as lithium ions
  • the separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.
  • the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.
  • the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.
  • the positive electrode current collector may be a metal foil or a composite current collector.
  • the metal foil aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used.
  • the composite current collector may include a polymer material base and a metal layer.
  • the composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds.
  • the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more.
  • lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.
  • lithium iron phosphate such as LiFePO4 (also referred to as LFP)
  • LiMnPO4 lithium manganese phosphate
  • lithium transition metal oxides may include, but are not limited to, lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 , LiMn2O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1/3 Co 1/3 Mn 1/3 O 2 (also referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O 2 (also referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O 2 (also referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O 2 (also referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O 2 (also referred to as NCM 811 ), and LiNi 0.8 Co 0.2 Mn 0.2 O 2 (also referred to as NCM 811 ),
  • the positive electrode may be a foamed metal.
  • the foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam.
  • the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided.
  • a lithium source material, potassium metal or sodium metal may also be filled or/and deposited in the foamed metal, and the lithium source material is lithium metal and/or a lithium-rich material.
  • the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.
  • the negative electrode current collector can be a metal foil, a foamed metal or a composite current collector.
  • a metal foil aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used.
  • the foamed metal can be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon, etc.
  • the composite current collector can include a polymer material base and a metal layer.
  • the composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).
  • a metal material copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.
  • a polymer material substrate such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.
  • the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.
  • the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.
  • the negative electrode active material may adopt the negative electrode active material for battery cells known in the art.
  • the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc.
  • the silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys.
  • the tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys.
  • the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.
  • the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.
  • the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.
  • the separator is a separator membrane.
  • separator membranes There are many types of separator membranes, and any known porous separator membrane with good chemical stability and mechanical stability can be selected.
  • the material of the separator may include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.
  • the separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different.
  • the separator may be a separate component located between the positive and negative electrodes, or may be attached to the surface of the positive and negative electrodes.
  • the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.
  • the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes.
  • the electrolyte can be liquid, gel or solid.
  • the liquid electrolyte includes an electrolyte salt and a solvent.
  • the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonyl imide, lithium bistrifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.
  • the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone.
  • the solvent may also be an ether solvent.
  • the ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.
  • the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.
  • solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.
  • the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, and the like.
  • the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.
  • oxide solid electrolyte crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film
  • a sulfide solid electrolyte crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide)
  • a halide solid electrolyte a nitride solid electrolyt
  • the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.
  • the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.
  • the electrode assembly is a laminate structure.
  • a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.
  • a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.
  • both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.
  • a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.
  • the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.
  • the shape of the electrode assembly can be cylindrical, flat, or polygonal.
  • the electrode assembly is provided with tabs, which can lead current out of the electrode assembly.
  • the tabs include a positive tab and a negative tab.
  • the battery cell may include a housing.
  • the housing is used to encapsulate components such as the electrode assembly and the electrolyte.
  • the housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.
  • the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes.
  • the prismatic battery cell includes but is not limited to a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery may be a battery module.
  • the multiple battery cells are arranged and fixed to form a battery module.
  • the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.
  • the box body can be used as a part of the chassis structure of the vehicle.
  • part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
  • the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
  • Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. The development of battery technology must consider many design factors at the same time, such as performance parameters such as energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, battery safety must also be considered. With the rapid development and increasing demand for batteries, the demand for battery life and reliability has also increased.
  • a pressure relief mechanism is usually provided on the outer shell of the battery cell to release the internal pressure of the battery cell through the pressure relief mechanism, thereby effectively improving the safety of the battery cell.
  • a certain amount of gas is generated during the use of the battery cell, causing the gas pressure in the outer shell of the battery cell to rise, which may cause the pressure relief mechanism of the battery cell to be activated and release pressure in advance during use, resulting in poor stability of the battery cell, which is not conducive to improving the service life and reliability of the battery cell.
  • an embodiment of the present application provides a battery cell, which includes a shell, an electrode assembly, a one-way valve and a shielding member.
  • the shell has a wall portion, the electrode assembly is accommodated in the shell, the one-way valve is arranged on the wall portion, and the one-way valve has an outlet, which is used to discharge the gas inside the shell.
  • the shielding member is installed on the wall portion, along the thickness direction of the wall portion, the shielding member is located on the side of the one-way valve away from the electrode assembly, and the shielding member covers the one-way valve, and an exhaust channel is formed between the shielding member and the wall portion, and the exhaust channel connects the outlet and the outside of the shell.
  • a one-way valve is provided on the wall of the outer shell so that the one-way valve can be opened in one direction and discharge the gas inside the outer shell to the outside of the outer shell. Therefore, when gas is generated inside the outer shell during normal use of the battery cell, it can be discharged to the outside of the outer shell through the one-way valve, so as to alleviate the phenomenon that the internal pressure of the battery cell reaches the threshold value in advance due to the increase of the internal air pressure of the battery cell, thereby causing the battery cell to actuate and release pressure in advance, thereby effectively improving the use stability of the battery cell, thereby improving the service life and reliability of the battery cell.
  • the covering member can play a certain protective and shielding role on the one-way valve.
  • it can reduce the wear or damage of the one-way valve in the external environment, and can reduce the risk of impurities or particulate matter in the external environment entering the one-way valve, which is beneficial to increasing the service life of the one-way valve.
  • covering the one-way valve by the covering member can enhance the aesthetics of the outer surface of the battery cell.
  • it is convenient to connect other components such as the detection element on the side of the covering member away from the one-way valve, so as to reduce the interference of the area where the one-way valve is provided on the wall on the connection detection element and other components.
  • the battery cells disclosed in the embodiments of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft, and can also be used in energy storage devices.
  • a power supply system comprising the battery cells and batteries disclosed in the present application can be used to form the electrical device, which is helpful to alleviate the phenomenon of premature valve opening and pressure relief during the use of the battery cells, thereby improving the service life and reliability of the battery cells.
  • the embodiment of the present application provides an electric device using a battery as a power source
  • the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.
  • the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.
  • the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.
  • FIG. 1 is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a fuel A gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • a battery 100 is arranged inside the vehicle 1000, and the battery 100 can be arranged at the bottom, head or tail of the vehicle 1000.
  • the battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000.
  • the vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.
  • the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
  • the battery 100 may include a housing 10 and a battery cell 20, wherein the battery cell 20 is used to be accommodated in the housing 10.
  • the box body 10 is used to provide an assembly space for the battery cell 20, and the box body 10 can adopt a variety of structures.
  • the box body 10 may include a first box body 11 and a second box body 12, the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cell 20.
  • the second box body 12 can be a hollow structure with one end open, the first box body 11 can be a plate-like structure, and the first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define an assembly space; in other embodiments, the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12.
  • the box body 10 formed by the first box body 11 and the second box body 12 can be in a variety of shapes, such as a cylinder or a cuboid. Exemplarily, in Figure 2, the shape of the box body 10 is a cuboid.
  • the battery cell 20 contained in the box 10 may be one or more.
  • the multiple battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel.
  • the multiple battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole module composed of the multiple battery cells 20 may be contained in the box 10; of course, in some embodiments, the battery 100 may also be a battery module formed by first connecting multiple battery cells 20 in series, in parallel, or in mixed connection, and then the multiple battery modules may be connected in series, in parallel, or in mixed connection to form a whole, and then contained in the box 10.
  • the battery 100 may further include other structures.
  • the battery 100 may further include a busbar component, which is disposed in the housing 10 and connects the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be cylindrical, flat, rectangular or other shapes. For example, in FIG2 , the battery cell 20 is a rectangular structure.
  • FIG. 3 is a schematic diagram of the structure of a battery cell 20 provided in some embodiments of the present application
  • FIG. 4 is an exploded diagram of the structure of a battery cell 20 provided in some embodiments of the present application
  • FIG. 5 is a partial cross-sectional view of a battery cell 20 provided in some embodiments of the present application
  • FIG. 6 is a schematic diagram of the structure of a one-way valve 23 provided in some embodiments of the present application.
  • the present application provides a battery cell 20, and the battery cell 20 includes a shell 21, an electrode assembly 22, a one-way valve 23 and a shielding member 24.
  • the shell 21 has a wall portion 211, and the electrode assembly 22 is accommodated in the shell 21.
  • the one-way valve 23 is arranged on the wall portion 211, and the one-way valve 23 has an outlet 231, and the outlet 231 is used to discharge the gas inside the shell 21.
  • the shielding member 24 is installed on the wall portion 211. Along the thickness direction X of the wall portion, the shielding member 24 is located on the side of the one-way valve 23 away from the electrode assembly 22, and the shielding member 24 covers the one-way valve 23.
  • An exhaust channel 25 is formed between the shielding member 24 and the wall portion 211, and the exhaust channel 25 connects the outlet 231 and the outside of the outer shell 21.
  • the housing 21 can also be used to contain electrolyte, such as electrolyte.
  • the housing 21 can be in various structural forms, such as a cylinder or a cuboid.
  • the housing 21 can be made of various materials, such as copper, iron, aluminum, steel or aluminum alloy.
  • the housing 21 may include a shell 212 and an end cap 213, wherein a accommodating cavity is formed inside the shell 212, and the accommodating cavity is used to accommodate the electrode assembly 22, and the accommodating cavity has an opening 2121, that is, the shell 212 is a hollow structure with an opening 2121 at one end, and the end cap 213 covers the opening 2121 of the shell 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.
  • the wall portion 211 for mounting the one-way valve 23 may be the end cap 213 of the housing 21, or a wall of the shell 212 of the housing 21.
  • the wall portion 211 is the end cap 213.
  • the structure of the battery cell 20 is not limited thereto, and in other embodiments, the wall portion 211 may also be the bottom wall of the shell 212 and the end cap 213 disposed opposite to each other, or the wall portion 211 may also be the side wall of the shell 212 and the end cap 213 adjacent to and connected to each other.
  • the electrode assembly 22 When assembling the battery cell 20 , the electrode assembly 22 may be placed into the shell 212 first, and the shell 212 may be filled with electrolyte. Then, the end cap 213 may be covered on the opening 2121 of the shell 212 to complete the assembly of the battery cell 20 .
  • the shell 212 can be in various shapes, such as a cylinder, a cuboid, or a prismatic structure.
  • the shape of the shell 212 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylindrical structure, a shell 212 with a cylindrical structure can be selected; if the electrode assembly 22 is a cuboid structure, a shell 212 with a cuboid structure can be selected.
  • the structure of the end cap 213 can also be various, for example, the end cap 213 is a plate-like structure or a hollow structure with one end open. Exemplarily, in FIG3, the shell 212 is a cuboid structure.
  • the outer shell 21 is not limited to the above structure, and the outer shell 21 may also be other structures.
  • the outer shell 21 may include a shell body 212 and two end caps 213.
  • the shell body 212 is a hollow structure with openings 2121 on opposite sides.
  • One end cap 213 corresponds to an opening 2121 of the shell body 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte. That is, the shell body 212 is formed with openings 2121 on opposite sides, and the two end caps 213 are respectively covered on the two sides of the shell body 212 to close the corresponding openings 2121.
  • the electrode assembly 22 is the component where electrochemical reactions occur in the battery cell 20, and the structure of the electrode assembly 22 can be of various types.
  • the electrode assembly 22 can be a wound structure formed by winding a positive electrode sheet, an isolation member, and a negative electrode sheet, or it can be a stacked structure formed by stacking a positive electrode sheet, an isolation member, and a negative electrode sheet.
  • the isolation member is an isolation membrane
  • the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.
  • the electrode assembly 22 contained in the housing 21 may be one or more.
  • the housing 21 of the battery cell 20 is provided with two electrode assemblies 22, and the two electrode assemblies 22 are stacked along the thickness direction thereof, that is, the two electrode assemblies 22 are stacked along the thickness direction of the battery cell 20.
  • the electrode assembly 22 contained in the housing 21 may also be one, three, or more. Four, five, six, seven or eight, etc.
  • the one-way valve 23 is provided on the wall portion 211, and is used to exhaust the gas inside the housing 21, that is, the one-way valve 23 can be opened in one direction to exhaust gas, so that the gas inside the housing 21 can be discharged to the outside of the housing 21 through the one-way valve 23.
  • the one-way valve 23 can be provided on the wall portion 211 in various structures, such as the one-way valve 23 welded to the wall portion 211, the one-way valve 23 clamped to the wall portion 211, or the one-way valve 23 bonded to the wall portion 211.
  • the outside of the housing 21 refers to the external environment of the battery cell 20.
  • a mounting hole 2111 is provided on the wall portion 211, and the mounting hole 2111 connects the interior of the shell 21 and the exterior of the shell 21, a portion of the one-way valve 23 is assembled into the mounting hole 2111, and extends to the interior of the shell 21 along the thickness direction X of the wall portion, and the one-way valve 23 is sealedly connected to the hole wall surface of the mounting hole 2111.
  • the shielding member 24 is mounted on the wall 211, and along the thickness direction X of the wall, the shielding member 24 is located on the side of the one-way valve 23 away from the electrode assembly 22, that is, the shielding member 24 and the one-way valve 23 are arranged along the thickness direction X of the wall, and the shielding member 24 is farther away from the electrode assembly 22 than the one-way valve 23.
  • the shielding member 24 can be mounted on the wall 211 in various structures, for example, the shielding member 24 can be mounted on the wall 211 by welding, interference fit, bolting, clamping or bonding.
  • the shielding member 24 covers the one-way valve 23 , that is, the projection of the one-way valve 23 in the thickness direction X of the wall is located inside the shielding member 24 .
  • An exhaust channel 25 is formed between the shielding member 24 and the wall portion 211, and the exhaust channel 25 connects the air outlet 231 and the outside of the outer shell 21. That is, the shielding member 24 and the wall portion 211 jointly define the exhaust channel 25 connecting the air outlet 231 of the one-way valve 23 and the outside of the outer shell 21, so that the gas discharged from the inside of the outer shell 21 through the air outlet 231 by the one-way valve 23 can enter the exhaust channel 25 and then be discharged to the outside of the outer shell 21.
  • the material of the shielding member 24 may be copper, iron, aluminum, steel or aluminum alloy.
  • the battery cell 20 may further include an electrode terminal 26 , which is insulated and mounted on the housing 21 , and is electrically connected to the electrode assembly 22 to output or input electrical energy of the battery cell 20 .
  • the electrode terminal 26 is insulated and mounted on the housing 21 , that is, no electrical connection is formed between the electrode terminal 26 and the housing 21 .
  • the battery cell 20 includes two electrode terminals 26.
  • each electrode assembly 22 has two pole ears 221, and the polarities of the two pole ears 221 are opposite.
  • the two electrode terminals 26 are electrically connected to the two pole ears 221 of the electrode assembly 22, respectively, so as to realize the input or output of the positive electrode and the negative electrode of the battery cell 20.
  • the pole ears 221 of the electrode assembly 22 are components formed by mutually stacking and connecting the regions on the positive electrode sheet that are not coated with the positive electrode active material layer, or components formed by mutually stacking and connecting the regions on the negative electrode sheet that are not coated with the negative electrode active material layer.
  • pole ears 221 are used to output the positive electrode of the electrode assembly 22, the pole ears 221 are components formed by mutually stacking and connecting the regions on the positive electrode sheet that are not coated with the positive electrode active material layer; if the pole ears 221 are used to output the negative electrode of the electrode assembly 22, the pole ears 221 are components formed by mutually stacking and connecting the regions on the negative electrode sheet that are not coated with the negative electrode active material layer.
  • the electrode terminal 26 may be made of a variety of materials.
  • the electrode terminal 26 may be made of copper, iron, aluminum, steel, or aluminum alloy.
  • the electrode terminals 26 may be installed on the housing 21 in various structures. For example, in FIG3 , both electrode terminals 26 are installed on the end cap 213 of the housing 21. Of course, the structure of the battery cell 20 is not limited thereto. In other embodiments, both electrode terminals 26 may be installed on the housing 212 of the housing 21. Similarly, one electrode terminal 26 may be installed on the housing 212 of the housing 21, and the other electrode terminal 26 may be installed on the end cap 213 of the housing 21.
  • the battery cell 20 may further include a pressure relief mechanism 27, which is mounted on the housing 21.
  • the pressure relief mechanism 27 may be disposed on the end cover 213 of the housing 21, or may be disposed on the shell 212 of the housing 21, and the pressure relief mechanism 27 is used to release the pressure inside the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined value.
  • the pressure relief mechanism 27 is disposed on the end cover 213 of the housing 21 , and the pressure relief mechanism 27 may be a pressure relief component such as an explosion-proof valve, an explosion-proof disk, a pressure relief valve or a safety valve.
  • the one-way valve 23 can be opened in one direction and discharge the gas inside the outer shell 21 to the outside of the outer shell 21, so that when gas is generated inside the outer shell 21 during normal use of the battery cell 20, it can be discharged to the outside of the outer shell 21 through the one-way valve 23, so as to alleviate the phenomenon that the internal pressure of the battery cell 20 reaches the threshold value in advance due to the increase of the internal air pressure of the battery cell 20, so as to cause the battery cell 20 to actuate and release pressure in advance, thereby effectively improving the use stability of the battery cell 20, so as to improve the service life and use reliability of the battery cell 20.
  • the shielding member 24 can play a certain protective and shielding role on the one-way valve 23. On the one hand, it can reduce the wear or damage of the one-way valve 23 in the external environment, and can reduce the risk of impurities or particulate matter in the external environment entering the one-way valve 23, which is beneficial to improving the service life of the one-way valve 23. On the other hand, covering the one-way valve 23 by the shielding member 24 can enhance the aesthetics of the outer surface of the battery cell 20.
  • the wall portion 211 has a first surface 2112 facing away from the electrode assembly 22, the first surface 2112 is provided with a mounting groove 2113, the bottom surface of the mounting groove 2113 is provided with a mounting hole 2111, at least a portion of the one-way valve 23 is disposed in the mounting hole 2111, and at least a portion of the shielding member 24 is accommodated in the mounting groove 2113.
  • the first surface 2112 is provided with a mounting groove 2113 , and the bottom surface of the mounting groove 2113 is provided with a mounting hole 2111 , that is, the mounting hole 2111 passes through the bottom surface of the mounting groove 2113 , so that the mounting hole 2111 is connected to the outside of the shell 21 through the mounting groove 2113 .
  • the shielding member 24 is accommodated in the mounting groove 2113 , that is, the shielding member 24 may be entirely located in the mounting groove 2113 , or only partially located in the mounting groove 2113 .
  • the shielding member 24 is entirely located in the mounting groove 2113 .
  • the installation groove 2113 By providing an installation groove 2113 on the first surface 2112 of the wall portion 211 away from the electrode assembly 22, and at least partially accommodating the shielding member 24 in the installation groove 2113, on the one hand, the space occupied by the shielding member 24 and the wall portion 211 in the thickness direction X of the wall portion can be reduced, which is beneficial to optimizing the volume of the battery cell 20.
  • the installation groove 2113 can play a certain positioning and limiting role for the shielding member 24, which is beneficial to reducing the difficulty of assembling the shielding member 24 connected to the wall portion 211.
  • FIG. 7 is a top view of a battery cell 20 provided in some embodiments of the present application
  • FIG. 8 is a partial enlarged view of the battery cell 20 at A shown in FIG. 7.
  • the exhaust channel 25 may include a first exhaust gap 251, which is formed between the shielding member 24 and the groove side of the mounting groove 2113, and the first exhaust gap 251 is used to connect the gas outlet 231 and the outside of the housing 21.
  • the first exhaust gap 251 plays a role in connecting the air outlet 231 and the outside of the shell 21.
  • the first exhaust gap 251 can be directly connected to the air outlet 231.
  • at least part of the projection of the first exhaust gap 251 in the thickness direction X of the wall is located in the mounting hole 2111, so that the air outlet 231 of the one-way valve 23 arranged in the mounting hole 2111 can be directly connected to the first exhaust gap 251.
  • the first exhaust gap 251 can also be indirectly connected to the air outlet 231.
  • the exhaust channel 25 can also include a second exhaust gap 252, and the second exhaust gap 252 is formed between the shielding member 24 and the bottom surface of the mounting groove 2113.
  • the second exhaust gap 252 connects the first exhaust gap 251 and the air outlet 231 of the one-way valve 23.
  • the gas exhausted by the one-way valve 23 can be discharged to the outside of the outer shell 21 through the first exhaust gap 251.
  • the battery cell 20 using this structure does not need to have a channel opened on the covering member 24, which is beneficial to reduce the processing difficulty and can improve the appearance of the battery cell 20.
  • the structure of the first exhaust gap 251 formed between the shielding member 24 and the groove side of the mounting groove 2113 can be various. According to some embodiments of the present application, please refer to Figures 7 and 8, and please further refer to Figure 9, which is a schematic diagram of the structure of the shielding member 24 provided in some embodiments of the present application.
  • the outer peripheral surface of the shielding member 24 includes a first corner surface 241 and at least two first side surfaces 242, and the first corner surface 241 connects two adjacent first side surfaces 242.
  • the groove side surface of the mounting groove 2113 includes a second corner surface 2113a and at least two second side surfaces 2113b, and the second corner surface 2113a connects two adjacent second side surfaces 2113b. Each second side surface 2113b is connected to a first side surface 242, and a first exhaust gap 251 is formed between the second corner surface 2113a and the first corner surface 241.
  • the first corner surface 241 connects two adjacent first side surfaces 242, that is, in the circumferential direction of the shielding member 24, the first corner surface 241 is located between the two first side surfaces 242 and connects the two first side surfaces 242, that is, the first corner surface 241 is the surface at the corner of the outer peripheral surface of the shielding member 24.
  • the second corner surface 2113a connects two adjacent second side surfaces 2113b, that is, in the circumferential direction of the mounting groove 2113, the second corner surface 2113a is located between the two second side surfaces 2113b and connects the two second side surfaces 2113b, that is, the second corner surface 2113a is the surface at the corner of the groove side surface of the mounting groove 2113.
  • Each first side surface 242 of the shielding member 24 abuts against and is connected to the corresponding second side surface 2113b of the groove side surface of the mounting groove 2113, so that the first corner surface 241 of the shielding member 24 is facing the second corner surface 2113a of the groove side surface of the mounting groove 2113, so that a first exhaust gap 251 is formed between the first corner surface 241 and the second corner surface 2113a.
  • connection structure between the first side surface 242 and the second side surface 2113b can be various, such as welding, bonding or interference fit.
  • the shielding member 24 and the mounting groove 2113 are both rectangular structures, so that four first corner surfaces 241 are correspondingly formed at the four corners of the shielding member 24, and correspondingly, four second corner surfaces 2113a are correspondingly formed at the four corners of the groove side of the mounting groove 2113, so that four first exhaust gaps 251 are formed between the shielding member 24 and the groove side of the mounting groove 2113.
  • first corner surface 241 Two adjacent first side surfaces 242 in the outer peripheral surface of the shielding member 24 are connected by a first corner surface 241, and two connected second side surfaces 2113b in the groove side surfaces of the mounting groove 2113 are connected by a second corner surface 2113a.
  • Each first side surface 242 is connected to a second side surface 2113b, and a first gap is formed between the first corner surface 241 and the second corner surface 2113a.
  • a first exhaust gap 251 is formed at the corner of the shielding member 24 and the mounting groove 2113.
  • the structure is simple and easy to implement.
  • the first corner surface 241 and the second corner surface 2113 a are both arc surfaces, and the radius of the first corner surface 241 is greater than the radius of the second corner surface 2113 a .
  • the first corner surface 241 and the second corner surface 2113a are both arc surfaces, that is, the first corner surface 241 is a surface formed at the rounded corner of the outer peripheral surface of the shielding member 24, and similarly, the second corner surface 2113a is a surface formed at the rounded corner of the groove side surface of the installation groove 2113.
  • the first corner surface 241 can also be a surface formed at the chamfer of the outer peripheral surface of the shielding member 24, and the second corner surface 2113a can also be a surface formed at the chamfer of the groove side surface of the installation groove 2113.
  • the radius of the first corner surface 241 is greater than the radius of the second corner surface 2113 a , that is, the diameter of the rounded corner of the outer peripheral surface of the shielding member 24 is greater than the diameter of the rounded corner of the groove side surface of the installation groove 2113 .
  • first corner surface 241 and the second corner surface 2113a By setting the first corner surface 241 and the second corner surface 2113a to be arc surfaces, and the radius of the first corner surface 241 is greater than the radius of the second corner surface 2113a, a first exhaust gap 251 is formed between the first corner surface 241 and the second corner surface 2113a, which has a simple structure and is easy to manufacture and process.
  • the first side surface 242 is connected to the second side surface 2113b by welding.
  • first side surface 242 and the second side surface 2113b are mutually welded structure, it is helpful to improve the connection firmness between the shielding member 24 and the groove side surface of the installation groove 2113, so as to improve the structural stability of the shielding member 24 assembled to the wall portion 211.
  • the cross-section of the shielding member 24 in the thickness direction X perpendicular to the wall portion is rectangular, and the outer peripheral surface of the shielding member 24 includes four first side surfaces 242 and four first corner surfaces 241, and a first exhaust gap 251 is formed at at least one first corner surface 241.
  • the cross section of the shielding member 24 in the thickness direction X perpendicular to the wall is rectangular, that is, the shielding member 24 is a rectangular structure.
  • the shape of the mounting groove 2113 matches the shielding member 24, and the mounting groove 2113 is also a rectangular structure.
  • a first exhaust gap 251 is formed at at least one first corner surface 241, that is, among the four first corner surfaces 241 of the shielding member 24, only one first corner surface 241 may have a first exhaust gap 251 formed thereon, or two, three or four first corner surfaces 241 may have a first exhaust gap 251 formed thereon.
  • the cross-section of the shielding member 24 in the direction X perpendicular to the thickness of the wall portion may also be a triangle, a pentagon, a hexagon, a trapezoid, or the like.
  • the shielding member 24 By configuring the shielding member 24 as a rectangular plate structure, the four sides of the shielding member 24 form four first side surfaces 242 , and four first corner surfaces 241 are formed at four right angles of the shielding member 24 , which has a simple structure and is easy to manufacture.
  • the first exhaust gap 251 formed between the shielding member 24 and the groove side of the installation groove 2113 can also be other structures, for example, refer to Figure 10, which is a schematic diagram of the structure of the shielding member 24 provided in some other embodiments of the present application.
  • the outer peripheral surface of the shielding member 24 is provided with a groove 243, and the first exhaust gap 251 is formed between the groove bottom surface of the groove 243 and the groove side of the installation groove 2113.
  • the outer circumferential surface of the shielding member 24 is used to be connected to the groove side surface of the installation groove 2113, so that the shielding member 24 is installed in the installation groove 2113.
  • a notch is formed in the shielding member 24 at the position where the groove 243 is provided, so that the shielding member 24 at the position where the groove 243 is provided and the groove side surface of the installation groove 2113 jointly define the first exhaust gap 251.
  • connection structure between the outer peripheral surface of the shielding member 24 and the groove side surface of the installation groove 2113 can be various, such as welding or bonding.
  • the number of the grooves 243 provided on the outer circumferential surface of the shielding member 24 may be one or more.
  • the plurality of grooves 243 are arranged at intervals along the circumferential direction of the shielding member 24 .
  • the shielding member 24 is a rectangular structure, and grooves 243 are provided on two of the four straight sides of the shielding member 24.
  • the number of grooves 243 provided on the outer peripheral surface of the shielding member 24 may also be three, four, or five, etc.
  • the shape of the shielding member 24 may also be a triangle, a trapezoid, a circle, etc.
  • a first exhaust gap 251 for exhaust is formed between the groove bottom surface of the groove 243 and the groove side surface of the mounting groove 2113 , which has a simple structure and is easy to manufacture.
  • the area of the outer circumferential surface of the shielding member 24 where the groove 243 is not provided is welded and connected to the groove side surface of the installation groove 2113 .
  • the shielding member 24 is connected to the groove side of the installation groove 2113.
  • the battery cell 20 adopting this structure is beneficial to the connection firmness between the shielding member 24 and the wall portion 211, so as to improve the structural stability of the shielding member 24 assembled on the wall portion 211.
  • the first exhaust gap 251 formed between the shielding member 24 and the groove side of the installation groove 2113 can also be other structures, for example, refer to Figure 11, which is a schematic diagram of the structure of the shielding member 24 provided in some embodiments of the present application.
  • the outer peripheral surface of the shielding member 24 is convexly provided with a plurality of convex portions 244, and the plurality of convex portions 244 are arranged at intervals along the circumference of the shielding member 24, and the convex portions 244 abut against the groove side of the installation groove 2113, and the first exhaust gap 251 is formed between the area of the outer peripheral surface of the shielding member 24 where the convex portions 244 are not provided and the groove side of the installation groove 2113.
  • the protrusion 244 abuts against the groove side of the installation groove 2113 to form a cavity between two adjacent protrusions 244, so that the outer peripheral surface of the shielding member 24, the groove side of the installation groove 2113 and the two adjacent protrusions 244 jointly define a first exhaust gap 251.
  • the shielding member 24 can be assembled in various structures in the installation groove 2113.
  • the shielding member 24 can be assembled in the installation groove 2113 by interference fit between the abutment portion and the groove side of the installation groove 2113, welding or bonding, etc.
  • the outer peripheral surface of the shielding member 24 is provided with a plurality of protrusions 244 arranged at intervals along the circumference of the shielding member 24, and the protrusions 244 abut against the groove side of the mounting groove 2113, so that a first exhaust gap 251 for exhaust is formed between the area of the outer peripheral surface of the shielding member 24 where the protrusions 244 are not provided and the groove side of the mounting groove 2113. That is to say, the first exhaust gap 251 is located between two adjacent protrusions 244, and the structure is simple and easy to assemble.
  • the protrusion 244 is interference fit with the groove side of the installation groove 2113.
  • the shielding member 24 is fixed in the mounting groove 2113 by interference fit of the protrusion 244 protruding from the outer peripheral surface of the shielding member 24 with the groove side surface of the mounting groove 2113.
  • the battery cell 20 adopting this structure can form a first exhaust gap 251 between two adjacent protrusions 244 while facilitating the installation of the shielding member 24 on the wall portion 211, which helps to reduce the difficulty of assembling the shielding member 24.
  • the first exhaust gap 251 can also be other structures.
  • a breathable groove can be set on the side of the installation groove 2113 to form the first exhaust gap 251 between the bottom surface of the breathable groove and the outer peripheral surface of the shielding member 24.
  • FIG. 12 is a bottom view of the shielding member 24 provided in some embodiments of the present application.
  • the exhaust channel 25 may further include a second exhaust gap 252, the second exhaust gap 252 is formed between the shielding member 24 and the bottom surface of the groove of the mounting groove 2113, and the second exhaust gap 252 communicates with the first exhaust gap 251 and the air outlet 231.
  • the second exhaust gap 252 is formed between the shielding member 24 and the bottom surface of the mounting groove 2113.
  • the shielding member 24 and the bottom surface of the mounting groove 2113 can be arranged at intervals along the thickness direction X of the wall portion, so that the second exhaust gap 252 is formed between the surface of the shielding member 24 facing the bottom surface of the mounting groove 2113 and the bottom surface of the mounting groove 2113.
  • the first groove 2451 is provided on the surface of the shielding member 24 facing the bottom surface of the mounting groove 2113, so that the second exhaust gap 252 is formed between the bottom surface of the first groove 2451 and the bottom surface of the mounting groove 2113.
  • a first groove 2451 may be provided on the bottom surface of the mounting groove 2113 to form a second exhaust gap 252 between the bottom surface of the first groove 2451 and the surface of the shielding member 24 facing the bottom surface of the mounting groove 2113 .
  • the exhaust channel 25 also includes a second exhaust gap 252 formed between the covering member 24 and the bottom surface of the mounting groove 2113, and the second exhaust gap 252 connects the first exhaust gap 251 and the gas outlet 231 to alleviate the exhaust obstruction between the gas outlet 231 and the first exhaust gap 251 caused by the covering member 24 abutting against the bottom surface of the mounting groove 2113, thereby improving the smoothness of gas discharge from the gas outlet 231 of the one-way valve 23 to the first exhaust gap 251.
  • the shielding member 24 has a second surface 245 facing the one-way valve 23, and the second surface 245 overlaps the bottom surface of the mounting groove 2113.
  • the second surface 245 is provided with a first groove 2451, and a second exhaust gap 252 is formed between the bottom surface of the first groove 2451 and the bottom surface of the mounting groove 2113.
  • the second surface 245 overlaps the bottom surface of the installation groove 2113, that is, part of the second surface 245 abuts against the bottom surface of the installation groove 2113, that is, along the thickness direction X of the wall, the shielding member 24 abuts against the bottom surface of the installation groove 2113.
  • a second exhaust gap 252 is formed between the bottom surface of the first groove 2451 and the bottom surface of the mounting groove 2113 , that is, the bottom surface of the first groove 2451 , the groove side surface of the first groove 2451 and the bottom surface of the mounting groove 2113 jointly define the second exhaust gap 252 .
  • the shielding member 24 is made to abut against the bottom surface of the mounting groove 2113, so as to improve the structural stability and reliability of the shielding member 24 installed in the mounting groove 2113.
  • a second exhaust gap 252 is formed between the bottom surface of the first groove 2451 and the bottom surface of the mounting groove 2113, so that the gas discharged from the outlet 231 of the one-way valve 23 can enter the first exhaust gap 251 through the first groove 2451 and then be discharged to the outside of the shell 21, so that the shielding member 24 can abut against the bottom surface of the mounting groove 2113 and at the same time, the first exhaust gap 251 can be connected with the outlet 231 through the first groove 2451.
  • a plurality of first exhaust gaps 251 are formed between the shielding member 24 and the groove side surface of the mounting groove 2113, and the plurality of first exhaust gaps 251 are arranged at intervals along the circumference of the shielding member 24, and a plurality of first grooves 2451 are provided on the second surface 245, and each first exhaust gap 251 is connected to a first groove 2451.
  • the first groove 2451 extends in the radial direction of the shielding member 24, and the first groove 2451 penetrates the first corner surface 241, so that the second exhaust gap 252 formed between the groove bottom surface of the first groove 2451 and the groove bottom surface of the mounting groove 2113 can be communicated with the first exhaust gap 251 formed between the first corner surface 241 and the second corner surface 2113a.
  • the first groove 2451 penetrates the groove bottom surface of the groove 243.
  • the first groove 2451 penetrates the area where the convex portion 244 is not provided on the outer peripheral surface of the shielding member 24.
  • the shielding member 24 has four first corner surfaces 241 , and a first exhaust gap 251 is formed at each first corner surface 241 .
  • four first grooves 2451 are provided on the second surface 245 of the shielding member 24 , and each first groove 2451 passes through a first corner surface 241 .
  • a plurality of first exhaust gaps 251 are formed between the shielding member 24 and the groove side surface of the mounting groove 2113 , and each first exhaust gap 251 is connected to a first groove 2451 , thereby facilitating further improving the exhaust efficiency.
  • the second surface 245 is further provided with a second groove 2452 , a plurality of first grooves 2451 are arranged around the second groove 2452 and are all connected to the second groove 2452 , and the second groove 2452 is connected to the air outlet 231 .
  • first grooves 2451 are provided on the second surface 245 of the shielding member 24, and the four first grooves 2451 are arranged at intervals along the circumference of the second groove 2452.
  • the first grooves 2451 extend along the radial direction of the shielding member 24 and penetrate the groove side faces of the second grooves 2452, so that the first grooves 2451 can be connected with the air outlet 231 through the second grooves 2452, thereby enabling the second exhaust gap 252 to be connected with the air outlet 231 through the second grooves 2452.
  • the second groove 2452 is connected to the air outlet 231 of the one-way valve 23, and a plurality of first grooves 2451 are set around the second groove 2452 and are all connected to the second groove 2452, so that the gas discharged from the air outlet 231 of the one-way valve 23 can enter the second groove 2452 and then pass through the plurality of first grooves 2451 and then pass through the corresponding first exhaust gaps 251 to be discharged to the outside of the shell 21, which is beneficial to improving the exhaust efficiency and can alleviate the phenomenon of gas accumulation between the shielding member 24 and the one-way valve 23.
  • the gas outlet 231 is arranged at the end of the one-way valve 23 away from the electrode assembly 22, the gas outlet 231 is arranged facing the second groove 2452, and the projection of the gas outlet 231 is located in the second groove 2452.
  • the projection of the one-way valve 23 in the thickness direction X of the wall is entirely located in the second groove 2452 .
  • the second groove 2452 is a structure covering the air outlet 231 in the thickness direction X of the wall, so that the gas discharged from the air outlet 231 of the one-way valve 23 can directly enter the second groove 2452, which is beneficial to improving the exhaust smoothness and exhaust efficiency.
  • the shielding member 24 does not extend beyond the first surface 2112 .
  • the shielding member 24 does not extend beyond the first surface 2112 , that is, the shielding member 24 does not extend out of the installation groove 2113 in the thickness direction X of the wall portion, so that the entire shielding member 24 is located in the installation groove 2113 .
  • the shielding member 24 By setting the shielding member 24 so as not to extend beyond the first surface 2112 of the wall 211 away from the electrode assembly 22 in the thickness direction X of the wall, the shielding member 24 can be protected to a certain extent by the installation groove 2113, thereby further reducing the wear of the shielding member 24.
  • the shielding member 24 has a third surface 246 facing away from the one-way valve 23 , and the third surface 246 is flush with the first surface 2112 .
  • the third surface 246 of the shielding member 24 away from the one-way valve 23 and the first surface 2112 of the wall portion 211 away from the electrode assembly 22 is beneficial to further improve the aesthetics of the outer surface of the battery cell 20, and it is convenient to set information codes or connect other components such as detection elements on the third surface 246 of the shielding member 24.
  • the information code can be a QR code, a barcode, numbers or text
  • the information of the battery cell 20 can be obtained by scanning or manually inputting the information code.
  • the detection element can include a circuit board and a sampling terminal electrically connected to the circuit board, and the sampling terminal includes a metal sheet (such as a nickel sheet), a temperature sensor, etc.
  • the one-way valve 23 does not extend beyond the bottom surface of the installation groove 2113 .
  • the one-way valve 23 does not extend beyond the bottom surface of the mounting groove 2113 , that is, the one-way valve 23 is disposed in the mounting hole 2111 and does not extend into the mounting groove 2113 in the thickness direction X of the wall.
  • the end surface of the one-way valve 23 facing away from the electrode assembly 22 in the thickness direction X of the wall is flush with the bottom surface of the mounting groove 2113, and the projection of the one-way valve 23 in the thickness direction X of the wall is located in the second groove 2452, so that the one-way valve 23 and the bottom surface of the second groove 2452 are structures arranged at intervals along the thickness direction X of the wall, and the end of the one-way valve 23 facing the electrode assembly 22 in the thickness direction X of the wall protrudes from the surface of the wall 211 facing the electrode assembly 22, so that part of the one-way valve 23 extends into the outer shell 21.
  • the one-way valve 23 By setting the one-way valve 23 so as not to extend beyond the bottom surface of the mounting groove 2113 in the thickness direction X of the wall, that is, the one-way valve 23 arranged in the mounting hole 2111 does not extend into the mounting groove 2113, the interference between the one-way valve 23 and the covering member 24 arranged in the mounting groove 2113 can be reduced, and the one-way valve 23 is facilitated to exhaust.
  • the shielding member 24 is fixedly connected to the wall portion 211 .
  • the shielding member 24 and the wall portion 211 may be fixedly connected in various structures.
  • the shielding member 24 may be connected to the wall portion 211 by welding, bonding or interference fit.
  • the shielding member 24 By setting the shielding member 24 as a structure fixedly connected to the wall portion 211, the risk of the shielding member 24 detaching from the wall portion 211 during use can be reduced, and the firmness of the connection between the shielding member 24 and the wall portion 211 can be improved, so as to facilitate setting information codes on the shielding member 24 or connecting other components such as detection elements.
  • FIG. 13 is a structural exploded view of a one-way valve 23 provided in some embodiments of the present application
  • FIG. 14 is a cross-sectional view of a one-way valve 23 provided in some embodiments of the present application.
  • the one-way valve 23 may include a valve body 232, an elastic member 233, and a blocking member 234.
  • the valve body 232 is disposed on the wall portion 211, and an installation cavity 2321 is formed inside the valve body 232.
  • An air inlet 2322 and an air outlet 231 are disposed on the valve body 232.
  • the air inlet 2322 is used to connect the installation cavity 2321 with the interior of the housing 21, and the air outlet 231 is used to connect the installation cavity 2321 with the exhaust channel 25.
  • the elastic member 233 is disposed in the installation cavity 2321.
  • the blocking member 234 is movably disposed in the installation cavity 2321 .
  • the blocking member 234 is used to block the air inlet 2322 under the action of the elastic member 233 , and is used to open the air inlet 2322 under the action of the gas inside the housing 21 .
  • the air inlet 2322 is used to connect the installation cavity 2321 and the interior of the outer shell 21, that is, the gas inside the outer shell 21 can enter the installation cavity 2321 through the air inlet 2322.
  • the air outlet 231 is used to connect the installation cavity 2321 and the exhaust channel 25, that is, the gas from the inside of the outer shell 21 that enters the installation cavity 2321 can enter the exhaust channel 25 through the air outlet 231, and then be discharged to the outside of the outer shell 21 through the exhaust channel 25.
  • the blocking piece 234 is movably disposed in the installation cavity 2321, that is, the blocking piece 234 can move in the installation cavity 2321, so that the blocking piece 234 can block the air inlet 2322 when it moves closer to the air inlet 2322, and conversely, the air inlet 2322 can be opened when the blocking piece 234 moves away from the air inlet 2322.
  • the sealing member 234 is used to seal the air inlet 2322 under the action of the elastic member 233, and is used to open the air inlet 2322 under the action of the gas inside the shell 21. That is to say, the elastic member 233 can provide elastic force for the sealing member 234, so that the sealing member 234 can abut against the bottom surface of the installation cavity 2321 to seal the air inlet 2322.
  • the gas inside the shell 21 can overcome the elastic force of the elastic member 233 and push the sealing member 234 to separate from the bottom surface of the installation cavity 2321, so as to realize the sealing member 234 opening the air inlet 2322, so that the gas inside the shell 21 can enter the installation cavity 2321 through the air inlet 2322 and then be discharged through the air outlet 231.
  • the elastic member 233 is an elastic member, and its structure can be various, such as a spring, a spring or elastic rubber, etc.
  • the elastic member 233 is a spring.
  • the elastic member 233 and the blocking member 234 can also be an elastic member as a whole, such as elastic rubber, etc.
  • the projection of the air outlet 231 in the thickness direction X of the wall may be located inside the spring or outside the spring.
  • the projections of the multiple air outlets 231 in the thickness direction X of the wall may be located inside the spring or around the outside of the spring. Of course, in some embodiments, they may be partially located inside the spring and partially located outside the spring.
  • the one-way valve 23 is provided with a valve body 232, an elastic member 233 and a blocking member 234.
  • the valve body 232 is provided on the wall portion 211.
  • the valve body 232 is provided with an air inlet 2322 communicating with the installation cavity 2321 and the inside of the housing 21, and an air outlet 231 connecting the installation cavity 2321 and the exhaust passage 25.
  • the elastic member 233 can apply an elastic force to the blocking member 234, so that The blocking member 234 can block the air inlet 2322 to prevent the gas outside the shell 21 from entering the interior of the shell 21, and when the pressure inside the shell 21 rises, the gas inside the shell 21 can act on the blocking member 234 and overcome the elastic force of the elastic member 233, so that the blocking member 234 can open the air inlet 2322, so that the gas inside the shell 21 can be discharged after being opened unidirectionally by the one-way valve 23, so as to realize the one-way exhaust function of the one-way valve 23.
  • the valve body 232 may include a valve body 2323 and a valve cover 2324.
  • the valve body 2323 is disposed on the wall portion 211, and the valve body 2323 is provided with an air inlet 2322.
  • the valve cover 2324 is disposed at one end of the valve body 2323 away from the electrode assembly 22, and the valve cover 2324 and the valve body 2323 are enclosed together to form an installation cavity 2321, and the valve cover 2324 is provided with an air outlet 231.
  • a mounting hole 2111 is provided on the wall portion 211, and the valve body 2323 is installed in the mounting hole 2111, and the valve body 2323 extends into the outer shell 21 along the thickness direction X of the wall portion, that is, the valve body 2323 protrudes from the surface of the wall portion 211 facing the electrode assembly 22 along the thickness direction X of the wall portion.
  • the valve body 2323 may be installed on the wall portion 211 in various structures.
  • the valve body 2323 may be welded to the wall surface of the mounting hole 2111 or may be bonded to the wall surface of the mounting hole 2111 by a sealant.
  • the air inlet 2322 is disposed at one end of the valve body 2323 in the thickness direction X of the wall portion close to the electrode assembly 22, that is, the air inlet 2322 passes through the bottom surface of the installation cavity 2321, and correspondingly, the blocking member 234 is movably disposed in the installation cavity 2321 along the thickness direction X of the wall portion, so that the blocking member 234 can block the air inlet 2322 when it abuts against the bottom surface of the installation cavity 2321.
  • the air inlet 2322 can also be disposed on one side of the valve body 2323 in the radial direction of the valve body 2323, and correspondingly, the blocking member 234 is movably disposed in the installation cavity 2321 along the radial direction of the valve body 2323.
  • the air outlet 231 is a first through hole provided on the valve cover 2324, and the first through hole penetrates both sides of the valve cover 2324 along the thickness direction X of the wall.
  • three air outlets 231 are provided on the valve cover 2324, and the three air outlets 231 are provided around the central axis of the mounting hole 2111.
  • the number of air outlets 231 provided on the valve cover 2324 may also be one, two, four, or five.
  • the multiple air outlets 231 there are multiple air outlets 231 disposed on the valve cover 2324 , and the multiple air outlets 231 are arranged at equal intervals.
  • a plurality of gas outlets 231 are arranged at equal intervals around the center of the valve cover 2324, which can make the gas flow out more smoothly.
  • valve cover 2324 is connected to the valve body 2323, and a sink 2323a is provided at one end of the valve body 2323 away from the electrode assembly 22, and at least a portion of the valve cover 2324 is accommodated in the sink 2323a.
  • the one-way valve 23 with such a structure can save the space occupied by the valve body 232 in the thickness direction X of the wall, and can improve the structural stability of the valve cover 2324 assembled on the valve body 2323, and can play a certain protective role on the valve cover 2324, so as to reduce the phenomenon of wear or damage of the valve cover 2324.
  • the installation cavity 2321 penetrates the bottom surface of the groove 2323a, and the valve cover 2324 is assembled in the groove 2323a and is aligned with the bottom surface of the groove 2323a.
  • the valve cover 2324 and the valve body 2323 are abutted to form a mounting cavity 2321 .
  • valve cover 2324 At least part of the valve cover 2324 is accommodated in the groove 2323a, that is, the valve cover 2324 may be located in the groove 2323a as a whole or partially. In other words, in the thickness direction X of the wall, the valve cover 2324 may extend out of the groove 2323a or may not extend out of the groove 2323a. For example, in FIG. 14 , the valve cover 2324 is located in the groove 2323a as a whole.
  • the material of the valve body 2323 can be a metal material, such as copper, iron, aluminum, steel or aluminum alloy, etc.
  • the material of the valve cover 2324 can also be a metal material, such as copper, iron, aluminum, steel or aluminum alloy, etc.
  • the valve body 2323 and the valve cover 2324 can be the same material or different materials.
  • the valve body 232 of the one-way valve 23 includes a valve main body 2323 and a valve cover 2324.
  • the valve cover 2324 is connected to the end of the valve main body 2323 that is away from the electrode assembly 22 in the thickness direction X of the wall, so that the valve cover 2324 and the valve main body 2323 jointly define an installation cavity 2321 for accommodating the elastic member 233 and the sealing member 234.
  • the one-way valve 23 with this structure is configured with the valve body 232 as two parts, thereby facilitating the assembly of the elastic member 233 and the sealing member 234 into the installation cavity 2321, which helps to reduce the difficulty of assembling the one-way valve 23.
  • the valve cover 2324 and the blocking member 234 are spaced apart from each other, the two ends of the elastic member 233 respectively abut against the valve cover 2324 and the blocking member 234 , and the air inlet 2322 is arranged on the bottom surface of the installation cavity 2321 .
  • the valve cover 2324 is arranged to face the bottom surface of the installation cavity 2321, and the two ends of the elastic member 233 in the thickness direction X of the wall portion are respectively abutted against the valve cover 2324 and the sealing member 234, so that the elastic member 233 is compressed between the valve cover 2324 and the sealing member 234, so that the elastic member 233 can provide elastic force for the sealing member 234, so that the sealing member 234 can block the air inlet 2322 arranged on the bottom surface of the installation cavity 2321 under the action of the elastic force of the elastic member 233.
  • a first guide column 2324 a is protruded from one side of the valve cover 2324 facing the blocking member 234 , and a portion of the elastic member 233 is sleeved on the outer side of the first guide column 2324 a .
  • the one-way valve 23 with such a structure can, on the one hand, play a certain positioning role for the elastic member 233 through the first guide column 2324a, so as to facilitate the assembly of the elastic member 233, which is beneficial to reduce the difficulty of assembling the elastic member 233;
  • the first guide column 2324a can play a certain guiding role when the elastic member 233 is compressed along the thickness direction X of the wall, so as to reduce the radial deformation of the elastic member 233 during the compression process, so that the elastic member 233 can be stably compressed along the thickness direction X of the wall, which is beneficial to improve the reliability of the elastic member 233, and further reduce the risk of the sealing member 234 accidentally opening the air inlet 2322.
  • the elastic member 233 is a spring, part of which is sleeved on the outside of the first guide column 2324a, and one end of the spring away from the blocking member 234 abuts against the surface of the valve cover 2324 where the first guide column 2324a is protruding, that is, the first guide column 2324a is inserted into the spring.
  • the central axis of the first guide column 2324a coincides with the central axis of the mounting hole 2111
  • the central axis of the elastic member 233 coincides with the central axis of the first guide column 2324a .
  • the multiple air outlets 231 surround the outer side of the first guide column 2324a.
  • the air outlet 231 can also be a structure that penetrates the first guide column 2324a along the thickness direction X of the wall.
  • the two ends of the elastic member 233 can respectively abut against the valve cover 2324 and the blocking member 234, so that the blocking member 234 can block the air inlet 2322 arranged on the bottom surface of the installation cavity 2321 along the thickness direction X of the wall under the action of the elastic member 233. That is to say, the air inlet 2322 is arranged at one end of the valve body 2323 facing the electrode assembly 22 in the thickness direction X of the wall, and the blocking member 234 can move along the thickness direction X of the wall and block the air inlet 2322 under the action of the elastic member 233.
  • the one-way valve 23 adopting this structure makes it easy for the elastic member 233 to apply elastic force to the blocking member 234, so that the blocking member 234 blocks the air inlet 2322, and can reduce the difficulty of assembling the elastic member 233.
  • the diameter of the first guide column 2324 a is D 1
  • the inner diameter of the elastic member 233 is D 2 , satisfying 0 mm ⁇ D 2 ⁇ D 1 ⁇ 5 mm.
  • the elastic member 233 is a spring, and the inner diameter D2 of the elastic member 233 is the diameter of the cavity formed inside the spring.
  • the size of the gap between the first guide column 2324a and the elastic member 233 is greater than 0mm and less than or equal to 5mm.
  • the difference between the inner diameter of the elastic member 233 and the diameter of the first guide column 2324a can be 0mm, 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.
  • the difference between the inner diameter of the elastic member 233 and the diameter of the first guide column 2324a is greater than 0 mm and less than or equal to 5 mm, on the one hand, the phenomenon that the elastic member 233 is not convenient to be assembled on the first guide column 2324a due to the difference between the inner diameter of the elastic member 233 and the diameter of the first guide column 2324a being less than or equal to 0 can be alleviated, so as to reduce the scratching phenomenon when the elastic member 233 is sleeved on the first guide column 2324a.
  • the phenomenon that the gap between the elastic member 233 and the first guide column 2324a is too large due to the difference between the inner diameter of the elastic member 233 and the diameter of the first guide column 2324a is too large can be alleviated, so as to reduce the radial movement or radial deformation of the elastic member 233, thereby improving the balance of the elastic force of the elastic member 233 acting on the blocking member 234, so as to reduce the risk of the blocking member 234 accidentally opening the air inlet 2322.
  • a first limiting groove may be further provided on a side of the valve cover 2324 facing the blocking member 234 , and an end of the elastic member 233 away from the blocking member 234 is inserted into the first limiting groove.
  • a first limiting groove is provided on the side of the valve cover 2324 facing the blocking member 234, that is, a first limiting groove is provided on the surface of the valve cover 2324 facing the blocking member 234 in the thickness direction X of the wall portion.
  • the first limiting groove is provided on the surface of the valve cover 2324 on which the first guide column 2324a is protruding.
  • One end of the elastic member 233 away from the blocking member 234 is inserted into the first limiting groove, that is, the end of the elastic member 233 away from the blocking member 234 abuts against the bottom surface of the first limiting groove.
  • the elastic member 233 is a spring
  • the first limiting groove is an annular groove structure.
  • the first limiting groove is arranged around the outer side of the first guide column 2324a.
  • the valve cover 2324 is also provided with a first limiting groove for inserting the elastic member 233 on one side facing the blocking member 234, so as to abut against the elastic member 233.
  • One end on the valve cover 2324 plays a limiting role to reduce the relative radial slip between the elastic member 233 and the valve cover 2324, thereby improving the balance of the elastic force of the elastic member 233 acting on the blocking member 234, which is beneficial to improving the reliability of the elastic member 233.
  • one end of the elastic member 233 away from the blocking member 234 is fixedly connected to the valve cover 2324 .
  • the stability of the elastic member 233 resting on the valve cover 2324 can be improved, so as to further reduce the relative slippage between the elastic member 233 and the valve cover 2324, and further improve the balance of the elastic force of the elastic member 233 acting on the sealing member 234.
  • FIG. 15 is a partial cross-sectional view of a battery cell 20 provided in some embodiments of the present application.
  • the installation cavity 2321 penetrates the end of the valve body 232 away from the electrode assembly 22 and forms an air outlet 231 , and the shielding member 24 is arranged facing the air outlet 231 .
  • the installation cavity 2321 passes through the end of the valve body 232 away from the electrode assembly 22 and forms an air outlet 231, that is, in an embodiment where the valve body 232 includes a valve body 2323 and a valve cover 2324, the valve body 232 is not provided with a valve cover 2324 to form an installation cavity 2321 inside the valve body 2323, and the installation cavity 2321 passes through the end of the valve body 2323 away from the electrode assembly 22 along the thickness direction X of the wall to form the air outlet 231.
  • the one-way valve 23 By setting the installation cavity 2321 to pass through the end of the valve body 232 away from the electrode assembly 22 in the thickness direction X of the wall, so as to form an outlet 231 at the end of the valve body 232 away from the electrode assembly 22, and covering the outlet 231 by the covering member 24, the one-way valve 23 with this structure facilitates the assembly of the elastic member 233 and the sealing member 234 into the installation cavity 2321 through the air inlet 2322, which helps to reduce the difficulty of assembling the one-way valve 23.
  • the air inlet 2322 may be provided on the side surface of the installation cavity 2321, that is, the blocking member 234 and the elastic member 233 are arranged along the radial direction of the installation cavity 2321, so that the blocking member 234 can block the air inlet 2322.
  • the air inlet 2322 may also be provided on the cavity bottom surface of the installation cavity 2321, that is, the blocking member 234 and the elastic member 233 are arranged along the thickness direction X of the wall, so that the blocking member 234 can block the air inlet 2322. As shown in FIG.
  • the shielding member 24 and the blocking member 234 are spaced apart, the two ends of the elastic member 233 are respectively against the shielding member 24 and the blocking member 234, and the air inlet 2322 is provided on the cavity bottom surface of the installation cavity 2321.
  • the shielding member 24 is arranged to face the bottom surface of the installation cavity 2321, and the two ends of the elastic member 233 in the thickness direction X of the wall portion are respectively abutted against the shielding member 24 and the blocking member 234, so that the elastic member 233 is compressed between the shielding member 24 and the blocking member 234, so that the elastic member 233 can provide elastic force for the blocking member 234, so that the blocking member 234 can block the air inlet 2322 arranged on the bottom surface of the installation cavity 2321 under the action of the elastic force of the elastic member 233.
  • the two ends of the elastic member 233 can respectively abut against the blocking member 24 and the blocking member 234, so that the blocking member 234 can block the air inlet 2322 arranged on the bottom surface of the installation cavity 2321 along the thickness direction X of the wall under the action of the elastic member 233. That is to say, the air inlet 2322 is arranged at one end of the valve body 2323 facing the electrode assembly 22 in the thickness direction X of the wall, and the blocking member 234 can move along the thickness direction X of the wall and block the air inlet 2322 under the action of the elastic member 233.
  • the one-way valve 23 with this structure makes it easy for the elastic member 233 to apply elastic force to the blocking member 234, so that the blocking member 234 blocks the air inlet 2322, and can reduce the difficulty of assembling the elastic member 233.
  • FIG. 5 is a partial cross-sectional view of the wall portion 211 of the outer shell 21 of the battery cell 20 provided in some embodiments of the present application.
  • the wall portion 211 has a first surface 2112 away from the electrode assembly 22, and a mounting groove 2113 is provided on the first surface 2112.
  • the shielding member 24 is assembled into the mounting groove 2113.
  • the bottom surface of the mounting groove 2113 is provided with a mounting hole 2111, and the mounting hole 2111 is connected to the interior of the outer shell 21.
  • the valve body 2323 is installed in the mounting hole 2111 and protrudes from the surface of the wall portion 211 facing the electrode assembly 22 along the thickness direction X of the wall portion.
  • the mounting hole 2111 includes a first hole section 2111a and a second hole section 2111b, the first hole section 2111a and the second hole section 2111b are arranged along the thickness direction X of the wall, and the first hole section 2111a is located on the side of the second hole section 2111b away from the electrode assembly 22, and the aperture of the first hole section 2111a is larger than the aperture of the second hole section 2111b.
  • the valve body 2323 has a connecting portion 2323b located in the first hole section 2111a, the connecting portion 2323b is an annular structure extending along the circumference of the valve body 2323, and the connecting portion 2323b is welded to the hole wall surface of the first hole section 2111a to form a weld mark of the annular structure.
  • a stress release groove 2323c is further provided on the connection portion 2323b, and the stress release groove 2323c is an annular groove structure.
  • the stress release groove 2323c surrounds the outer side of the valve cover 2324, and in the embodiment where the valve body 232 is only provided with the valve body 2323, the stress release groove 2323c surrounds the outer side of the installation cavity 2321.
  • the welding stress generated by the mutual welding of the connection portion 2323b and the hole wall surface of the first hole section 2111a can be released through the stress release groove 2323c, thereby reducing the influence of the welding stress on the weld connecting the hole wall surface of the first hole section 2111a and the connection portion 2323b, reducing the risk of cracking of the weld, and further reducing the risk of sealing failure at the weld.
  • a second guide column 2341 is protrudingly provided on the side of the blocking member 234 facing the valve cover 2324 or the shielding member 24 , and a portion of the elastic member 233 is sleeved on the outer side of the second guide column 2341 .
  • the elastic member 233 is a spring, part of which is sleeved on the outside of the second guide column 2341, and one end of the spring away from the valve cover 2324 or the shielding member 24 abuts against the surface of the blocking member 234 on which the second guide column 2341 is protruding, that is, the second guide column 2341 is inserted into the spring.
  • the central axis of the second guide column 2341 coincides with the central axis of the mounting hole 2111
  • the central axis of the elastic member 233 coincides with the central axis of the second guide column 2341 .
  • a second guide column 2341 is protruded on one side of the blocking member 234 facing the valve cover 2324, and a portion of the elastic member 233 is sleeved on the second guide column.
  • the one-way valve 23 with this structure can, on the one hand, play a certain positioning role on the elastic member 233 through the second guide column 2341, so as to facilitate the assembly of the elastic member 233, which is beneficial to reducing the difficulty of assembling the elastic member 233;
  • the second guide column 2341 can play a certain guiding role when the elastic member 233 is compressed along the thickness direction X of the wall, so as to reduce the radial deformation of the elastic member 233 during the compression process, so that the elastic member 233 can be stably compressed along the thickness direction X of the wall, which is beneficial to improving the reliability of the elastic member 233, and further reducing the risk of the blocking member 234 accidentally opening the air inlet 2322.
  • the diameter of the second guide column 2341 is D 3
  • the inner diameter of the elastic member 233 is D 2 , satisfying 0 mm ⁇ D 3 ⁇ D 1 ⁇ 5 mm.
  • the elastic member 233 is a spring, and the inner diameter D2 of the elastic member 233 is the diameter of the cavity formed inside the spring.
  • the size of the gap between the second guide post 2341 and the elastic member 233 is greater than 0mm and less than or equal to 5mm.
  • the difference between the inner diameter of the elastic member 233 and the diameter of the second guide column can be 0mm, 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc.
  • the difference between the inner diameter of the elastic member 233 and the diameter of the second guide column 2341 is greater than 0 mm and less than or equal to 5 mm, on the one hand, the phenomenon that the elastic member 233 is not convenient to be assembled on the second guide column 2341 due to the difference between the inner diameter of the elastic member 233 and the diameter of the second guide column 2341 being less than or equal to 0 can be alleviated, so as to reduce the scratching phenomenon when the elastic member 233 is sleeved on the second guide column 2341.
  • the phenomenon that the gap between the elastic member 233 and the second guide column 2341 is too large due to the difference between the inner diameter of the elastic member 233 and the diameter of the second guide column 2341 is too large can be alleviated, so as to reduce the radial movement or radial deformation of the elastic member 233, thereby improving the balance of the elastic force of the elastic member 233 acting on the blocking member 234, so as to reduce the risk of the blocking member 234 accidentally opening the air inlet 2322.
  • a second limiting groove may be further provided on the side of the blocking member 234 facing the valve cover 2324 , and an end of the elastic member 233 away from the valve cover 2324 is inserted into the second limiting groove.
  • a second limiting groove is provided on the side of the blocking member 234 facing the valve cover 2324, that is, a second limiting groove is provided on the surface of the blocking member 234 facing the valve cover 2324 in the thickness direction X of the wall portion.
  • a second limiting groove is provided on the surface of the blocking member 234 on which the second guide column 2341 is protruding.
  • One end of the elastic member 233 away from the valve cover 2324 is inserted into the second limiting groove, that is, the end of the elastic member 233 away from the valve cover 2324 abuts against the bottom surface of the second limiting groove.
  • the elastic member 233 is a spring
  • the second limiting groove is an annular groove structure.
  • the second limiting groove is arranged around the outer side of the second guide column 2341.
  • one end of the elastic member 233 away from the valve cover 2324 is fixedly connected to the blocking member 234 .
  • the stability of the elastic member 233 resting on the blocking member 234 can be improved, so as to further reduce the relative slippage between the elastic member 233 and the blocking member 234, and further improve the balance of the elastic force of the elastic member 233 acting on the blocking member 234.
  • the blocking member 234 may include a pressing portion 2342 and a sealing portion 2343.
  • the sealing portion 2343 is connected to the side of the pressing portion 2342 that is away from the valve cover 2324 or the shielding member 24. The sealing portion 2343 is used to seal the air inlet 2322.
  • the elastic member 233 can provide an elastic force for the pressing portion 2342 , so that the pressing portion 2342 can be pressed against the sealing portion 2343 , thereby sealing the air inlet 2322 through the sealing portion 2343 .
  • the rigidity of the pressing portion 2342 is greater than that of the sealing portion 2343, that is, the anti-deformation capability of the pressing portion 2342 is greater than that of the sealing portion 2343, so that the pressing portion 2342 can better press the sealing portion 2343 onto the bottom surface of the installation cavity 2321 to block the air inlet 2322.
  • the pressing portion 2342 can be made of a variety of materials, such as steel, iron or aluminum.
  • the sealing portion 2343 can also be made of a variety of materials, such as rubber, silicone or plastic.
  • connection structure between the pressing portion 2342 and the sealing portion 2343 may be various, such as clamping, bolting, or bonding.
  • the second guide post 2341 is convexly disposed on the surface of the pressing portion 2342 facing the valve cover 2324 or the shielding member 24.
  • the blocking member 234 is provided with a second limiting groove on the side facing the valve cover 2324, the second limiting groove is disposed on the surface of the pressing portion 2342 facing the valve cover 2324.
  • the blocking member 234 By configuring the blocking member 234 to include a clamping portion 2342 and a sealing portion 2343, the clamping portion 2342 is disposed on the side of the sealing portion 2343 facing the valve cover 2324, the sealing portion 2343 is used to block the air inlet 2322, and the two ends of the elastic member 233 are respectively against the valve cover 2324 and the clamping portion 2342, so that the elastic member 233 can exert an elastic force on the sealing portion 2343 through the clamping portion 2342, which is beneficial to improving the balance of the elastic force of the elastic member 233 acting on the sealing portion 2343, and further can effectively improve the sealing effect of the sealing portion 2343 on the air inlet 2322.
  • the pressing portion 2342 has a side facing the sealing portion 2343 provided with a snap-fit groove 2342a, and the sealing portion 2343 has a side facing the pressing portion 2342 protruding with a snap-fit portion 2343a.
  • the plugging member 234 with such a structure can improve the structural stability of the sealing portion 2343 disposed on the pressing portion 2342, thereby reducing the radial slippage of the sealing portion 2343 relative to the pressing portion 2342, thereby facilitating the sealing portion 2343 to block the air inlet 2322, thereby reducing the phenomenon of the air inlet 2322 being opened by mistake.
  • the clamping portion 2343a is a circular columnar structure, and correspondingly, the clamping groove 2342a is a circular groove.
  • the sealing portion 2343 is bonded to the pressing portion 2342.
  • the bonding structure used to connect the sealing portion 2343 and the pressing portion 2342 can, on the one hand, improve the structural stability of the sealing portion 2343 connected to the pressing portion 2342, which is conducive to reducing the risk of the sealing portion 2343 and the pressing portion 2342 being separated from each other, so as to improve the reliability of the sealing portion 2343 blocking the air inlet 2322, and on the other hand, it is easy to realize the assembly connection between the sealing portion 2343 and the pressing portion 2342, which is conducive to reducing the difficulty of assembly between the sealing portion 2343 and the pressing portion 2342.
  • the material of the sealing part 2343 includes EPDM, fluororubber or Teflon.
  • the sealing part 2343 made of EPDM, fluororubber or Teflon makes the sealing part 2343 have good corrosion resistance, which can effectively alleviate the phenomenon that the sealing part 2343 is corroded by the electrolyte, thereby facilitating the service life of the sealing part 2343 and reducing the phenomenon that the sealing part 2343 has a poor effect of blocking the air inlet 2322 due to the corrosion of the sealing part 2343.
  • the blocking member 234 may not be provided with the pressing portion 2342 , and the blocking member 234 only includes the sealing portion 2343 , and one end of the elastic member 233 directly abuts against the sealing portion 2343 .
  • the size of the gap between the valve cover 2324 and the blocking member 234 is L, satisfying 0 mm ⁇ L ⁇ 2 mm.
  • the size of the gap between the valve cover 2324 and the blocking member 234 is L, that is, the distance between the valve cover 2324 and the blocking member 234 in the thickness direction X of the wall is L.
  • the size L of the gap between the valve cover 2324 and the sealing member 234 can be 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2 mm, etc.
  • L is the dimension of the gap formed between the first guide column 2324a and the second guide column 2341 in the thickness direction X of the wall; in the embodiment in which the valve cover 2324 is protrudingly provided with the first guide column 2324a and the sealing member 234 is not protrudingly provided with the second guide column 2341, L is the dimension of the gap formed between the first guide column 2324a and the surface of the sealing member 234 facing the valve cover 2324 in the thickness direction X of the wall; in the embodiment in which the valve cover 2324 is not protrudingly provided with the first guide column 2324a and the sealing member 234 is protrudingly provided with the second guide column 2341, L is the dimension of the gap formed between the second guide column 2341 and the surface of the valve cover 2324 facing the sealing member 234 in the thickness
  • the obstruction of the valve cover 2324 to the blocking piece 234 can be reduced, so that there is space between the valve cover 2324 and the blocking piece 234 for the blocking piece 234 to move along the thickness direction X of the wall, so that when the gas inside the shell 21 pushes the blocking piece 234, the blocking piece 234 can open the air inlet 2322 for exhaust.
  • the phenomenon that the one-way valve 23 occupies too much space in the thickness direction X of the wall due to the excessive gap between the valve cover 2324 and the blocking piece 234 can be alleviated, which is beneficial to improving the space utilization rate of the battery cell 20.
  • the battery cell 20 may also include an insulating member 28, which is disposed on the side of the wall portion 211 facing the electrode assembly 22.
  • the valve body 232 of the one-way valve 23 protrudes from the surface of the wall portion 211 facing the electrode assembly 22, and the insulating member 28 includes a main body portion 281 and a receiving portion 282.
  • the main body portion 281 is disposed on the side of the wall portion 211 facing the electrode assembly 22, and the receiving portion 282 is connected to the main body portion 281.
  • the portion of the valve body 232 of the one-way valve 23 protruding from the surface of the wall portion 211 facing the electrode assembly 22 is accommodated in the receiving portion 282.
  • the insulating member 28 is disposed on a side of the wall portion 211 facing the electrode assembly 22 , and the insulating member 28 serves to separate the wall portion 211 from the electrode assembly 22 to insulate and isolate the wall portion 211 from the electrode assembly 22 .
  • the insulating member 28 may be made of various materials, such as rubber, silicone or plastic.
  • the portion of the valve body 232 of the one-way valve 23 that protrudes from the surface of the wall portion 211 facing the electrode assembly 22 is accommodated in the accommodating portion 282, that is, the accommodating portion 282 is formed at the position of the insulating member 28 corresponding to the one-way valve 23, and the accommodating portion 282 covers the outer side of the portion of the valve body 232 of the one-way valve 23 that protrudes from the surface of the wall portion 211 facing the electrode assembly 22.
  • the main body 281 and the receiving portion 282 of the insulating member 28 may be an integral structure or a split structure.
  • the main body 281 and the receiving portion 282 may be integrally formed by injection molding or milling.
  • the receiving portion 282 may be connected to the main body 281 by bonding or snap-fitting.
  • the main body 281 and the receiving portion 282 are an integral structure.
  • the accommodating portion 282 is provided with a second through hole 2821 , and the second through hole 2821 is communicated with the air inlet 2322 provided on the valve body 232 .
  • a second through hole 2821 is set on the accommodating portion 282, and the second through hole 2821 penetrates the accommodating portion 282, so that the second through hole 2821 can connect the interior of the accommodating portion 282 and the interior of the shell 21, so that the air inlet 2322 of the valve body 232 can connect to the interior of the shell 21 through the second through hole 2821.
  • the second through hole 2821 can connect the interior of the shell 21 and the interior of the accommodating portion 282, so that the air inlet 2322 of the valve body 232 of the one-way valve 23 can be connected with the interior of the shell 21 through the second through hole 2821, so that the gas inside the shell 21 can enter the accommodating portion 282 through the second through hole 2821 and then be discharged to the outside of the shell 21 through the one-way valve 23. Therefore, there is no need for the gas to enter the accommodating portion 282 through the gap between the main body 281 and the wall portion 211 and then be discharged through the one-way valve 23, which is beneficial to improving the smoothness of the one-way valve 23 to discharge the gas inside the shell 21.
  • the air inlet 2322 is disposed at one end of the valve body 232 facing the electrode assembly 22.
  • the accommodating portion 282 includes a first wall 2822 and a second wall 2823, the first wall 2822 is disposed around the valve body 232, along the thickness direction X of the wall portion, one end of the first wall 2822 is connected to the body portion 281, the second wall 2823 is connected to one end of the first wall 2822 away from the body portion 281, and the second through hole 2821 is disposed in the second wall 2823.
  • the first wall 2822 is disposed around the valve body 232 , that is, the first wall 2822 of the accommodating portion 282 is an annular structure disposed around the valve body 232 .
  • first wall 2822 is connected to the main body 281, and the second wall 2823 is connected to the end of the first wall 2822 away from the main body 281. That is, the second wall 2823 is connected to the main body 281 through the first wall 2822, and the second wall 2823 and the first wall 2822 together enclose a accommodating portion 282 for accommodating part of the valve body 232.
  • the second wall 2823 is a wall facing the accommodating portion 282 and the air inlet 2322.
  • the second through hole 2821 is disposed on the second wall 2823, that is, the second through hole 2821 is disposed on one end of the accommodating portion 282 facing the electrode assembly 22.
  • the second through hole 2821 may also be disposed on the first wall 2822, that is, the second through hole 2821 is disposed on one side of the accommodating portion 282 in the radial direction of the accommodating portion 282.
  • the accommodating portion 282 is provided with a first wall 2822 and a second wall 2823 which are connected to each other.
  • the first wall 2822 is arranged around the valve body 232, and the second wall 2823 is located at one end of the valve body 232 facing the electrode assembly 22 in the thickness direction X of the wall portion, so that the first wall 2822 and the second wall 2823 enclose a accommodating portion 282 for accommodating the portion of the valve body 232 extending to the inside of the outer shell 21.
  • the second through hole 2821 of the accommodating portion 282 By arranging the second through hole 2821 of the accommodating portion 282 on the second wall 2823, it is helpful to realize the corresponding arrangement of the air inlet 2322 and the second through hole 2821, so as to improve the smoothness of the one-way valve 23 discharging the gas inside the outer shell 21.
  • the material of the shielding member 24 is the same as the material of the wall portion 211 .
  • the material of the shielding member 24 and the material of the wall portion 211 can both be copper, iron, aluminum, steel, or aluminum alloy.
  • the shielding member 24 and the wall portion 211 By setting the shielding member 24 and the wall portion 211 to be structures of the same material, on the one hand, it is convenient to assemble the shielding member 24 and the wall portion 211 of the same material to each other, such as welding, which helps to reduce the difficulty of assembling the shielding member 24 on the wall portion 211. On the other hand, it can make the appearance of the shielding member 24 and the wall portion 211 the same, which helps to improve the aesthetic appearance of the battery cell 20.
  • the housing 21 may include a shell 212 and an end cap 213.
  • the shell 212 has an interior formed with an accommodation cavity having an opening 2121, the accommodation cavity is used to accommodate the electrode assembly 22, and the end cap 213 closes the opening 2121, and the end cap 213 is a wall portion 211.
  • the end cover 213 is the wall portion 211 , that is, the one-way valve 23 is disposed on the end cover 213 .
  • the structure of the battery cell 20 is not limited to this.
  • the battery cell 20 can also be other structures.
  • the shell 212 includes a wall portion 211, that is, the one-way valve 23 is installed on a wall of the shell 212.
  • the one-way valve 23 can be installed on the bottom wall of the shell 212 and the end cover 213, or it can be installed on the side wall of the shell 212 and the end cover 213 that are adjacent to and interconnected.
  • the battery cell 20 with such a structure is convenient for installing the one-way valve 23 on the end cover 213, which is conducive to reducing the difficulty of assembling the battery cell 20, so as to improve the production efficiency of the battery cell 20.
  • the battery cell 20 with such a structure can reduce the influence of the stress generated when the end cover 213 and the shell 212 are connected to each other on the one-way valve 23, so as to alleviate the phenomenon of damage to the one-way valve 23, and thus can improve the stability and service life of the battery cell 20.
  • the battery cell 20 further includes a pressure relief mechanism 27 , which is disposed on the outer shell 21 .
  • the pressure relief mechanism 27 is configured to actuate and release the internal pressure of the battery cell 20 when the battery cell 20 thermally runs away.
  • the actuation pressure of the pressure relief mechanism 27 is greater than the opening pressure of the one-way valve 23 .
  • the pressure relief mechanism 27 is disposed on the outer shell 21 , and may be disposed on the end cover 213 or on the shell 212 .
  • the pressure relief mechanism 27 is disposed on the end cover 213 .
  • the pressure relief mechanism 27 is configured to be actuated and release the internal pressure of the battery cell 20 when the battery cell 20 thermally runs away, that is, when thermal runaway occurs inside the battery cell 20, the pressure relief mechanism 27 can be actuated and opened to release the gas generated inside the battery cell 20 due to thermal runaway.
  • the actuation pressure of the pressure relief mechanism 27 is greater than the opening pressure of the one-way valve 23, that is, the pressure of the gas inside the shell 21 to open the pressure relief mechanism 27 is greater than the pressure of the gas inside the shell 21 to open the one-way valve 23. It should be noted that when the battery cell 20 has thermal runaway, the gas inside the shell 21 of the battery cell 20 will increase rapidly to open the pressure relief mechanism 27 for pressure relief, while the gas generated inside the shell 21 of the battery cell 20 during normal use can open the one-way valve 23 when it reaches the threshold, but the pressure relief mechanism 27 cannot be opened.
  • the pressure relief mechanism 27 can be an integral structure with the housing 21, or a separate structure. If the pressure relief mechanism 27 can be an integral structure with the housing 21, the pressure relief mechanism 27 is an area on the housing 21 where a weak structure is provided, for example, an area on the housing 21 where a notch groove is provided; if the pressure relief mechanism 27 can be a separate structure from the housing 21, the pressure relief mechanism 27 can be connected to the housing 21 by welding, hot melting, injection molding or bonding. Exemplarily, in FIG4 , the pressure relief mechanism 27 is a separate structure from the housing 21, and the pressure relief mechanism 27 is provided on the end cover 213 of the housing 21.
  • the pressure relief mechanism 27 can be a pressure relief component such as an explosion-proof valve, an explosion-proof disk, a pressure relief valve or a safety valve.
  • the electrode terminal 26 and the pressure relief mechanism 27 are both disposed on the end cover 213 .
  • the electrode terminal 26 and the pressure relief mechanism 27 may also be disposed on different walls of the outer shell 21 .
  • the pressure relief mechanism 27 is disposed on the shell 212
  • the electrode terminal 26 is disposed on the end cover 213 .
  • the opening pressure of the one-way valve 23 for exhaust By setting the opening pressure of the one-way valve 23 for exhaust to be lower than the actuating pressure of the pressure relief mechanism 27 for pressure relief, when gas is generated inside the outer shell 21 during normal use of the battery cell 20, it can be discharged to the outside of the outer shell 21 through the one-way valve 23, thereby alleviating the phenomenon that the pressure relief mechanism 27 actuates pressure relief in advance before the thermal runaway of the battery cell 20 due to the increase in internal air pressure of the battery cell 20, thereby effectively improving the use stability of the battery cell 20, thereby improving the service life and reliability of the battery cell 20.
  • the one-way valve 23 and the pressure relief mechanism 27 may be disposed on the same wall of the housing 21.
  • the one-way valve 23 and the pressure relief mechanism 27 are both disposed on the end cover 213.
  • the one-way valve 23 and the pressure relief mechanism 27 may be disposed on different walls of the housing 21.
  • the one-way valve 23 is disposed on the end cover 213, and the pressure relief mechanism 27 is disposed on the housing 212.
  • the exhaust rate of the one-way valve 23 is smaller than the exhaust rate of the pressure relief mechanism 27 .
  • the battery cell 20 can be protected from thermal runaway.
  • the phenomenon that the pressure relief mechanism 27 cannot be actuated and opened due to the one-way valve 23 exhausting air too quickly is alleviated, so that the pressure relief mechanism 27 can be actuated and stably discharge the internal pressure of the battery cell 20 when the battery cell 20 is in thermal runaway, which is beneficial to reduce the risk of fire and explosion of the battery cell 20 when the battery cell 20 is in thermal runaway.
  • the battery cell 20 is an alkali metal battery, such as a sodium metal battery, a lithium metal battery, etc.
  • the alkali metal battery is used in conjunction with the one-way valve 23 to timely discharge the gas generated by the alkali metal battery during normal operation, thereby increasing the service life of the alkali metal battery.
  • the present application further provides a battery 100 , and the battery 100 includes a battery cell 20 of any of the above solutions.
  • the battery 100 may further include a box body 10, in which the battery cell 20 is accommodated.
  • the box body 10 may include a first box body 11 and a second box body 12, which cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cell 20.
  • the second box body 12 may be a hollow structure with one end open, and the first box body 11 may be a plate-like structure, and the first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define an assembly space.
  • the structure of the box body 10 is not limited thereto, and in other embodiments, the first box body 11 and the second box body 12 may also be hollow structures both with one side open, and the open side of the first box body 11 covers the open side of the second box body 12.
  • the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder or a cuboid, etc.
  • the box body 10 is a cuboid structure.
  • the battery cell 20 disposed in the housing 10 may be one or more.
  • a plurality of battery cells 20 are disposed in the housing 10 of the battery 100, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are both connected in series and in parallel.
  • the plurality of battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the plurality of battery cells 20 may be accommodated in the housing 10; of course, the battery 100 may also be a battery module formed by first connecting a plurality of battery cells 20 in series, in parallel, or in mixed connection, and then the plurality of battery modules may be connected in series, in parallel, or in mixed connection to form a whole, and then accommodated in the housing 10.
  • the battery 100 may further include other structures.
  • the battery 100 may further include a busbar component, which connects the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20 .
  • the battery 100 may not be provided with a box 10, and the battery 100 includes a plurality of battery cells 20, and the battery 100 composed of a plurality of battery cells 20 may be directly assembled on an electrical device to provide electrical energy to the electrical device through the plurality of battery cells 20.
  • the box 10 may be used as a part of the electrical device.
  • the box 10 may be used as a part of the chassis structure of the vehicle 1000, for example, a part of the box 10 may become at least a part of the floor of the vehicle 1000, or a part of the box 10 may become at least a part of the crossbeam and longitudinal beam of the vehicle 1000.
  • the present application further provides an electrical device, which includes a battery cell 20 according to any of the above schemes, and the battery cell 20 is used to provide electrical energy to the electrical device.
  • the electrical device may be any of the aforementioned devices or systems using the battery cell 20 .
  • the present application provides a battery cell 20, which includes a shell 21, an electrode assembly 22, a one-way valve 23, and a shielding member 24.
  • the shell 21 has a wall portion 211, and the shell 21 includes a shell 212 and an end cover 213.
  • the shell 212 has a receiving cavity with an opening 2121 formed inside, and the electrode assembly 22 is received in the receiving cavity.
  • the end cover 213 closes the opening 2121, and the end cover 213 is the wall portion 211.
  • the wall portion 211 has a first surface 2112 away from the electrode assembly 22, and the first surface 2112 is provided with a mounting groove 2113, and the bottom surface of the mounting groove 2113 is provided with a mounting hole 2111, and the one-way valve 23 is installed in the mounting hole 2111 and protrudes from the surface of the wall portion 211 facing the electrode assembly 22, and the one-way valve 23 is used to discharge the gas inside the shell 21.
  • the one-way valve 23 includes a valve body 232, an elastic member 233 and a blocking member 234.
  • the valve body 232 is disposed on the wall portion 211, and a mounting cavity 2321 is formed inside the valve body 232.
  • the valve body 232 is provided with an air inlet 2322 and an air outlet 231.
  • the air inlet 2322 is used to connect the mounting cavity 2321 with the interior of the housing 21, and the air outlet 231 is used to connect the mounting cavity 2321 with the exhaust passage 25.
  • the elastic member 233 is disposed in the mounting cavity 2321, and the blocking member 234 is movably disposed in the mounting cavity 2321.
  • the blocking member 234 is used to block the air inlet 2322 under the action of the elastic member 233, and is used to open the air inlet 2322 under the action of the gas inside the housing 21.
  • the valve body 232 includes a valve body 2323 and a valve cover 2324.
  • the valve body 2323 is installed in the installation hole 2111, and an air inlet 2322 is provided at one end of the valve body 2323 facing the electrode assembly 22.
  • the valve cover 2324 is connected to one end of the valve body 2323 away from the electrode assembly 22 along the thickness direction X of the wall.
  • the valve cover 2324 and the valve body 2323 are enclosed together to form an installation cavity 2321.
  • the valve cover 2324 is provided with an air outlet 231.
  • the valve cover 2324 and the blocking member 234 are arranged at intervals.
  • the two ends of the elastic member 233 are respectively against the valve cover 2324 and the blocking member 234.
  • the air inlet 2322 is provided on the bottom surface of the installation cavity 2321.
  • the shielding member 24 is installed in the installation groove 2113, and the material of the shielding member 24 is the same as that of the wall 211.
  • the shielding member 24 is located on the side of the one-way valve 23 away from the electrode assembly 22, and the shielding member 24 covers the one-way valve 23.
  • An exhaust channel 25 is formed between the shielding member 24 and the wall portion 211, and the exhaust channel 25 communicates with the gas outlet 231 and the outside of the housing 21.
  • the exhaust channel 25 includes a first exhaust gap 251 and a second exhaust gap 252.
  • the first exhaust gap 251 is formed between the shielding member 24 and the groove side of the mounting groove 2113.
  • the cross-section of the shielding member 24 and the mounting groove 2113 in the thickness direction X perpendicular to the wall is rectangular, the outer peripheral surface of the shielding member 24 includes four first corner surfaces 241 and four first side surfaces 242, each two adjacent first side surfaces 242 are connected by a first corner surface 241, the bottom surface of the mounting groove 2113 includes four second corner surfaces 2113a and four second side surfaces 2113b, each two adjacent second side surfaces 2113b are connected by a second corner surface 2113a, each first side surface 242 and the corresponding second side surface 2113b are mutually abutted and welded, and a first exhaust gap 251 is formed between each first corner surface 241 and the corresponding second corner surface 2113a.
  • the first corner surface 241 and the second corner surface 2113a are both arc surfaces, and the radius of the first corner surface 241 is greater than the radius of the second corner surface 2113a.
  • the shielding member 24 has a second surface 245 facing the one-way valve 23 and a third surface 246 facing away from the one-way valve 23.
  • the second surface 245 overlaps the bottom surface of the installation groove 2113, and the third surface 246 is flush with the first surface 2112.
  • the second surface 245 is provided with four first grooves 2451, and the first groove 2451 extends along the radial direction of the shielding member 24 and penetrates a first corner surface 241.
  • a second exhaust gap 252 is formed between the bottom surface of the first groove 2451 and the bottom surface of the groove of the installation groove 2113.
  • the second surface 245 is also provided with a second groove 2452.
  • the plurality of first grooves 2451 are arranged around the second groove 2452 and are all connected to the second groove 2452.
  • the second groove 2452 is connected to the air outlet 231.
  • the air outlet 231 is arranged facing the second groove 2452, and the projection of the air outlet 231 is located in the second groove 2452.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请提供了一种电池单体、电池及用电装置,属于电池技术领域。其中,电池单体包括外壳、电极组件、单向阀和遮挡件。外壳具有壁部,电极组件容纳于外壳内,单向阀设置于壁部,单向阀具有出气口,出气口用于排出外壳内部的气体。遮挡件安装于壁部,沿壁部的厚度方向,遮挡件位于单向阀背离电极组件的一侧,且遮挡件覆盖单向阀,遮挡件与壁部之间形成有排气通道,排气通道连通出气口和外壳的外部。通过遮挡件能够对单向阀起到保护和遮挡作用,能够减少单向阀出现磨损或损坏的现象,且能够降低外部环境中的杂质进入单向阀内的风险,且能够提升电池单体的外表面的美观度,便于在遮挡件背离单向阀的一侧对应连接检测元件等其他部件。

Description

电池单体、电池及用电装置
相关申请的交叉引用
本申请要求享有于2023年6月16日提交的名称为“电池单体、电池及用电装置”的中国专利申请2023107269094的优先权,该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域,具体而言,涉及一种电池单体、电池及用电装置。
背景技术
近些年,新能源汽车有了飞跃式的发展,在电动汽车领域,动力电池作为电动汽车的动力源,起着不可替代的重要作用。随着新能源汽车的大力推广,对动力电池产品的需求也日益增长,其中,电池作为新能源汽车核心零部件在使用可靠性和使用寿命方面均有着较高的要求。
在电池技术中,为了保证电池单体的安全性,一般会在电池单体的外壳上设置用于泄放电池单体内部压力的泄压机构,使得在电池单体内部压力或温度达到阈值时,泄压机构能够致动并泄放电池单体内部的压力。然而,现有的电池单体的泄压机构在使用的过程中可能出现提前致动泄压的现象,以造成电池单体的使用稳定性较差,从而不利于提升电池单体的使用寿命和使用可靠性。
发明内容
本申请实施例提供一种电池单体、电池及用电装置,能够有效提升电池单体的使用寿命和使用可靠性。
第一方面,本申请实施例提供一种电池单体,包括外壳、电极组件、单向阀和遮挡件;所述外壳具有壁部;所述电极组件容纳于所述外壳内;所述单向阀设置于所述壁部,所述单向阀具有出气口,所述出气口用于排出所述外壳内部的气体;所述遮挡件安装于所述壁部,沿所述壁部的厚度方向,所述遮挡件位于所述单向阀背离所述电极组件的一侧,且所述遮挡件覆盖所述单向阀,所述遮挡件与所述壁部之间形成有排气通道,所述排气通道连通所述出气口和所述外壳的外部。
在上述技术方案中,通过在外壳的壁部上设置单向阀,使得单向阀能够单向打开并将外壳内部的气体排出外壳的外部,从而在电池单体正常使用过程中外壳的内部产生气体时能够通过单向阀排出外壳的外部,以缓解因电池单体的内部气压上升而导致电池单体的内部压力提前达到阈值的现象,进而能够有效提升电池单体的使用稳定性,以提升电池单体的使用寿命和使用可靠性。此外,通过在单向阀背离电极组件的一侧设置遮挡件,且遮挡件覆盖单向阀,使得遮挡件能够对单向阀起到一定的保护和遮挡作用,一方面能够减少单向阀在外部环境下出现磨损或损坏的现象,且能够降低外部环境中的杂质或颗粒物等进入单向阀内的风险,有利于提高单向阀的使用寿命,另一方面通过遮挡件对单向阀进行遮盖能够提升电池单体的外表面的美观度,再一方面,便于在遮挡件背离单向阀的一侧对应连接检测元件等其他部件,以减少壁部设置单向阀的区域对连接检测元件等其他部件造成的干涉影响。
在一些实施例中,沿所述壁部的厚度方向,所述壁部具有背离所述电极组件的第一表面,所述第一表面设置有安装槽,所述安装槽的槽底面设置有安装孔,所述单向阀的至少部分设置于所述安装孔内,所述遮挡件的至少部分容纳于所述安装槽内。
在上述技术方案中,通过在壁部背离电极组件的第一表面上设置安装槽,且遮挡件的至少部分容纳于安装槽内,一方面能够减少遮挡件与壁部在壁部的厚度方向上的占用空间,有利于优化电池单体的体积,另一方面通过安装槽能够对遮挡件起到一定的定位和限位作用,有利于降低遮挡件连接在壁部上的装配难度。
在一些实施例中,所述排气通道包括第一排气间隙,所述第一排气间隙形成于所述遮挡件与所述安装槽的槽侧面之间,所述第一排气间隙用于连通所述出气口和所述外壳的外部。
在上述技术方案中,通过在遮挡件与安装槽的槽侧面之间形成与外壳的外部连通的第一排气间隙,使得单向阀排出的气体能够通过第一排气间隙排出外壳的外部,采用这种结构能够的电池单体无需在遮挡件上开设孔道,有利于降低加工难度,且能够提升电池单体外观的美观度。
在一些实施例中,所述遮挡件的外周面包括第一拐角面和至少两个第一侧面,所述第一拐角面连接相邻的两个所述第一侧面;所述安装槽的槽侧面包括第二拐角面和至少两个第二侧面,所述第二拐角面连接相邻的两个所述第二侧面,每个所述第二侧面与一个所述第一侧面相连,所述第二拐角面与所述第一拐角面之间形成所述第一排气间隙。
在上述技术方案中,遮挡件的外周面中相邻的两个第一侧面通过第一拐角面相连,且安装槽的槽侧面中相连的两个第二侧面通过第二拐角面相连,每个第一侧面与一个第二侧面相连,且在第一拐角面和第二拐角面之间形成第一间隙,也就是说,遮挡件与安装槽的拐角处形成第一排气间隙,一方面便于在遮挡件的外周面与安装槽的槽侧面之间形成第一排气间隙,结构简单,且便于实现,另一方面在实现遮挡件的外周面与安装槽的槽侧面之间形成有第一排气间隙的同时有利于提高遮挡件的外周面与安装槽的槽侧面之间的连接面积,有利于提高遮挡件连接于壁部上的牢固性。
在一些实施例中,所述第一拐角面和所述第二拐角面均为圆弧面,所述第一拐角面的半径大于所述第二拐角面的半径。
在上述技术方案中,通过将第一拐角面和第二拐角面均设置为圆弧面,且第一拐角面的半径大于第二拐角面的半径,以实现在第一拐角面和第二拐角面之间形成有第一排气间隙,结构简单,且便于制造和加工。
在一些实施例中,所述第一侧面与所述第二侧面焊接连接。
在上述技术方案中,通过将第一侧面与第二侧面设置为相互焊接的结构,从而有利于提高遮挡件与安装槽的槽侧面之间的连接牢固性,以提升遮挡件装配至壁部上的结构稳定性。
在一些实施例中,所述遮挡件在垂直于所述壁部的厚度方向上的横截面为矩形,所述遮挡件的外周面包括四个所述第一侧面和四个所述第一拐角面,至少一个所述第一拐角面处形成有所述第一排气间隙。
在上述技术方案中,通过将遮挡件设置为矩形板状结构,以使遮挡件的四个边形成四个第一侧面,且在遮挡件的四个直角处形成有四个第一拐角面,结构简单,且便于制造。
在一些实施例中,所述遮挡件的外周面设置有凹槽,所述凹槽的槽底面与所述安装槽的槽侧面之间形成所述第一排气间隙。
在上述技术方案中,通过在遮挡件的外周面上设置凹槽,以使凹槽的槽底面与安装槽的槽侧面之间形成有用于排气的第一排气间隙,结构简单,且便于制造。
在一些实施例中,所述遮挡件的外周面未设置所述凹槽的区域与所述安装槽的槽侧面焊接连通。
在上述技术方案中,通过将遮挡件的外周面未设置凹槽的区域与安装槽的槽侧面相互焊接,以实现遮挡件连接于安装槽的槽侧面上,采用这种结构的电池单体有利于遮挡件与壁部的连接牢固性,以提升遮挡件装配至壁部上的结构稳定性。
在一些实施例中,所述遮挡件的外周面凸设有多个凸部,多个所述凸部沿所述遮挡件的周向间隔排布,所述凸部抵接于所述安装槽的槽侧面,所述遮挡件的外周面未设置所述凸部的区域与所述安装槽的槽侧面之间形成所述第一排气间隙。
在上述技术方案中,通过遮挡件的外周面凸设有沿遮挡件的周向间隔排布的多个凸部,且凸部抵接于安装槽的槽侧面上,使得遮挡件的外周面未设置凸部的区域与安装槽的槽侧面之间形成用于排气的第一排气间隙,也就是说,第一排气间隙位于相邻的两个凸部之间,结构简单,且便于装配。
在一些实施例中,所述凸部与所述安装槽的槽侧面过盈配合。
在上述技术方案中,通过将遮挡件的外周面凸设的凸部与安装槽的槽侧面相互过盈配合,以实现遮挡件固定于安装槽内,采用这种结构的电池单体在实现相邻的两个凸部之间形成第一排气间隙的同时便于将遮挡件安装于壁部上,有利于降低遮挡件的装配难度。
在一些实施例中,所述排气通道还包括第二排气间隙,所述第二排气间隙形成于所述遮挡件与所述安装槽的槽底面之间,所述第二排气间隙连通所述第一排气间隙和所述出气口。
在上述技术方案中,排气通道还包括形成于遮挡件与安装槽的槽底面之间的第二排气间隙,且第二排气间隙连通第一排气间隙和出气口,以缓解因遮挡件抵靠于安装槽的槽底面上后造成出气口与第一排气间隙之间出现排气受阻的现象,从而能够提升气体从单向阀的出气口排放至第一排气间隙的顺畅度。
在一些实施例中,沿所述壁部的厚度方向,所述遮挡件具有面向所述单向阀的第二表面,所述第二表面搭接于所述安装槽的槽底面,所述第二表面设置有第一槽,所述第一槽的槽底面与所述安装槽的槽底面之间形成所述第二排气间隙。
在上述技术方案中,通过将遮挡件的第二表面搭接于安装槽的槽底面上,使得遮挡件抵靠于安装槽的槽底面上,以提升遮挡件安装于安装槽内的结构稳定性和可靠性,此外,通过在第二表面上设置第一槽,以使第一槽的槽底面与安装槽的槽底面之间形成第二排气间隙,使得单向阀的出气口排出的气体能够通过第一槽进入至第一排气间隙后排出外壳的外部,从而在实现遮挡件抵靠于安装槽的槽底面上的同时能够通过第一槽实现第一排气间隙与出气口的连通。
在一些实施例中,所述遮挡件与所述安装槽的槽侧面之间形成有多个所述第一排气间隙,多个所述第一排气间隙沿所述遮挡件的周向间隔排布,所述第二表面上设置有多个所述第一槽,每个所述第一排气间隙与一个所述第一槽连通。
在上述技术方案中,通过在遮挡件与安装槽的槽侧面之间形成有多个第一排气间隙,且每个第一排气间隙与一个第一槽连通,从而有利于进一步提高排气效率。
在一些实施例中,所述第二表面还设置有第二槽,多个所述第一槽设置于所述第二槽的周围并均与所述第二槽连通,所述第二槽与所述出气口连通。
在上述技术方案中,通过在遮挡件面向单向阀的第二表面上设置第二槽,第二槽与单向阀的出气口连通,且多个第一槽设置在第二槽的周围并均与第二槽连通,以使单向阀的出气口排出的气体能够进入第二槽内后通过多个第一槽再分别经过对应的第一排气间隙排出外壳的外部,有利于提高排气效率,且能够缓解气体堆积在遮挡件与单向阀之间的现象。
在一些实施例中,沿所述壁部的厚度方向,所述出气口设置于所述单向阀背离所述电极组件的一端,所述出气口面向所述第二槽设置,且所述出气口的投影位于所述第二槽内。
在上述技术方案中,通过将单向阀的出气口和第二槽设置为相互面向设置的结构,且出气口在壁部的厚度方向上的投影位于第二槽内,使得第二槽为在壁部的厚度方向覆盖出气口的结构,以使单向阀的出气口排出的气体能够直接进入至第二槽内,有利于提高排气顺畅度和排气效率。
在一些实施例中,沿所述壁部的厚度方向,所述遮挡件不超出所述第一表面。
在上述技术方案中,通过将遮挡件设置为在壁部的厚度方向上不超出壁部背离电极组件的第一表面,从而通过安装槽能够对遮挡件起到一定的保护作用,以进一步减少遮挡件的磨损现象。
在一些实施例中,所述遮挡件具有背离所述单向阀的第三表面,所述第三表面与所述第一表面平齐。
在上述技术方案中,通过将遮挡件背离单向阀的第三表面与壁部背离电极组件的第一表面设置为相互平 齐的结构,从而有利于进一步提升电池单体的外表面的美观度,且便于在遮挡件的第三表面上设置信息码或连接检测元件等其他部件。
在一些实施例中,沿所述壁部的厚度方向,所述单向阀不超出所述安装槽的槽底面。
在上述技术方案中,通过将单向阀设置为在壁部的厚度方向上不超出安装槽的槽底面,也就是说,设置于安装孔内的单向阀未延伸至安装槽内,从而能够减少单向阀与设置于安装槽内的遮挡件之间的干涉现象,且便于单向阀进行排气。
在一些实施例中,所述遮挡件与所述壁部固定连接。
在上述技术方案中,通过将遮挡件设置为与壁部相互固定连接的结构,有利于降低遮挡件在使用过程中从壁部上脱离的风险,且能够提升遮挡件与壁部之间的连接牢固性,以便于在遮挡件上设置信息码或连接检测元件等其他部件。
在一些实施例中,所述单向阀包括阀体、弹性件和封堵件;所述阀体设置于所述壁部,所述阀体的内部形成有安装腔,所述阀体上设置有进气口和所述出气口,所述进气口用于连通所述安装腔和所述外壳的内部,所述出气口用于连通所述安装腔和所述排气通道;所述弹性件设置于所述安装腔内;所述封堵件可移动地设置于所述安装腔内,所述封堵件用于在所述弹性件的作用下封堵所述进气口,且用于在所述外壳内部的气体的作用下打开所述进气口。
在上述技术方案中,单向阀设置有阀体、弹性件和封堵件,阀体设置于壁部上,阀体上设置连通安装腔和外壳内部的进气口以及连接安装腔和排气通道的出气口,通过将弹性件和封堵件均设置于安装腔内,使得弹性件能够为封堵件施加弹性力,以使封堵件能够封堵进气口,以阻止外壳的外部的气体进入至外壳的内部,且在外壳内部的压力上升时外壳内部的气体能够作用在封堵件上并克服弹性件的弹力,以使封堵件能够打开进气口,从而使得外壳内部的气体能够通过单向阀单向打开后排出,以实现单向阀的单向排气功能。
在一些实施例中,所述阀体包括阀本体和阀盖;所述阀本体设置于所述壁部,所述阀本体设置有所述进气口;沿所述壁部的厚度方向,所述阀盖设置于所述阀本体背离所述电极组件的一端,所述阀盖与所述阀本体共同围合形成所述安装腔,所述阀盖设置有所述出气口。
在上述技术方案中,单向阀的阀体包括阀本体和阀盖,通过将阀盖连接于阀本体在壁部的厚度方向上背离电极组件的一端,以使阀盖与阀本体共同界定用于容纳弹性件和封堵件的安装腔,采用这种结构的单向阀将阀体设置为两个部分,从而便于将弹性件和封堵件装配至安装腔内,有利于降低单向阀的装配难度。
在一些实施例中,沿所述壁部的厚度方向,所述阀盖与所述封堵件间隔设置,所述弹性件的两端分别抵靠于所述阀盖和所述封堵件,所述进气口设置于所述安装腔的腔底面。
在上述技术方案中,通过将阀盖与封堵件设置为沿壁部的厚度方向间隔排布的结构,使得弹性件的两端能够分别抵靠于阀盖和封堵件,以实现封堵件能够在弹性件的作用下沿壁部的厚度方向封堵设置于安装腔的腔底面上的进气口,也就是说,进气口设置于阀本体在壁部的厚度方向上面向电极组件的一端,封堵件能够在弹性件的作用下沿壁部的厚度方向移动并封堵进气口,采用这种结构的单向阀便于弹性件向封堵件施加弹性力,以使封堵件封堵进气口,且能够降低弹性件的装配难度。
在一些实施例中,沿所述壁部的厚度方向,所述安装腔贯穿所述阀体背离所述电极组件的一端并形成所述出气口,所述遮挡件面向所述出气口设置。
在上述技术方案中,通过将安装腔设置为在壁部的厚度方向上贯穿阀体背离电极组件的一端,以在阀体背离电极组件的一端形成出气口,且通过遮挡件对出气口进行遮盖,采用这种结构的单向阀便于将弹性件和封堵件通过进气口装配至安装腔内,有利于降低单向阀的装配难度。
在一些实施例中,沿所述壁部的厚度方向,所述遮挡件与所述封堵件间隔设置,所述弹性件的两端分别抵靠于所述遮挡件和所述封堵件,所述进气口设置于所述安装腔的腔底面。
在上述技术方案中,通过将遮挡件与封堵件沿壁部的厚度方向间隔设置,使得弹性件的两端能够分别抵靠于遮挡件和封堵件,以实现封堵件能够在弹性件的作用下沿壁部的厚度方向封堵设置于安装腔的腔底面上的进气口,也就是说,进气口设置于阀本体在壁部的厚度方向上面向电极组件的一端,封堵件能够在弹性件的作用下沿壁部的厚度方向移动并封堵进气口,采用这种结构的单向阀便于弹性件向封堵件施加弹性力,以使封堵件封堵进气口,且能够降低弹性件的装配难度。
在一些实施例中,所述遮挡件的材质与所述壁部的材质相同。
在上述技术方案中,通过将遮挡件与壁部设置为相同材质的结构,一方面便于将同材质的遮挡件和壁部相互进行装配,有利于降低遮挡件设置在壁部上的装配难度,另一方面能够使得遮挡件与壁部的外观相同,有利于提高电池单体的外观的美观度。
在一些实施例中,所述外壳包括壳体和端盖;所述壳体的内部形成具有开口的容纳腔,所述容纳腔用于容纳所述电极组件;所述端盖封闭所述开口;其中,所述端盖为所述壁部;或,所述壳体包括所述壁部。
在上述技术方案中,通过将外壳的壁部设置为外壳用于封闭壳体的开口的端盖,采用这种结构的电池单体便于在端盖上安装单向阀和遮挡件,有利于降低在电池单体的装配难度,以提升电池单体的生产效率。同样的,通过将外壳的壁部设置为壳体的一个壁,采用这种结构的电池单体能够减少端盖与壳体相互连接时产生的应力对单向阀和遮挡件造成的影响,以缓解单向阀出现损坏或遮挡件连接失效等现象,进而能够提升电池单体的使用稳定性和使用寿命。
第二方面,本申请实施例还提供一种电池,包括上述的电池单体。
第三方面,本申请实施例还提供一种用电装置,包括上述的电池单体,所述电池单体用于提供电能。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图;
图2为本申请一些实施例提供的电池的结构爆炸图;
图3为本申请一些实施例提供的电池单体的结构示意图;
图4为本申请一些实施例提供的电池单体的结构爆炸图;
图5为本申请一些实施例提供的电池单体的局部剖视图;
图6为本申请一些实施例提供的单向阀的结构示意图;
图7为本申请一些实施例提供的电池单体的俯视图;
图8为图7所示的电池单体的A处的局部放大图;
图9为本申请一些实施例提供的遮挡件的结构示意图;
图10为本申请又一些实施例提供的遮挡件的结构示意图;
图11为本申请再一些实施例提供的遮挡件的结构示意图;
图12为本申请一些实施例提供的遮挡件的仰视图;
图13为本申请一些实施例提供的单向阀的结构爆炸图;
图14为本申请一些实施例提供的单向阀的剖视图;
图15为本申请又一些实施例提供的电池单体的局部剖视图;
图16为本申请一些实施例提供的电池单体的外壳的壁部的局部剖视图;
图17为本申请一些实施例提供的绝缘件的局部剖视图。
图标:1000-车辆;100-电池;10-箱体;11-第一箱本体;12-第二箱本体;20-电池单体;21-外壳;211-壁部;2111-安装孔;2111a-第一孔段;2111b-第二孔段;2112-第一表面;2113-安装槽;2113a-第二拐角面;2113b-第二侧面;212-壳体;2121-开口;213-端盖;22-电极组件;221-极耳;23-单向阀;231-出气口;232-阀体;2321-安装腔;2322-进气口;2323-阀本体;2323a-沉槽;2323b-连接部;2323c-应力释放槽;2324-阀盖;2324a-第一导向柱;233-弹性件;234-封堵件;2341-第二导向柱;2342-压紧部;2342a-卡接槽;2343-密封部;2343a-卡接部;24-遮挡件;241-第一拐角面;242-第一侧面;243-凹槽;244-凸部;245-第二表面;2451-第一槽;2452-第二槽;246-第三表面;25-排气通道;251-第一排气间隙;252-第二排气间隙;26-电极端子;27-泄压机构;28-绝缘件;281-本体部;282-容纳部;2821-第二通孔;2822-第一壁;2823-第二壁;200-控制器;300-马达;X-壁部的厚度方向。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
除非另有定义,本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同;本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本申请;本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形,意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“附接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本申请中字符“/”,一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中,相同的附图标记表示相同的部件,并且为了简洁,在不同实施例中,省略对相同部件的详细说明。应理解,附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸,以及集成装置的整体厚度、长宽等尺寸仅为示例性说明,而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请实施例中,电池单体可以为二次电池,二次电池是指在电池单体放电后可通过充电的方式使活性材料激活而继续使用的电池单体。
电池单体可以为锂离子电池、钠离子电池、钠锂离子电池、锂金属电池、钠金属电池、锂硫电池、镁离子电池、镍氢电池、镍镉电池、铅蓄电池等,本申请实施例对此并不限定。
电池单体一般包括电极组件。电极组件包括正极、负极以及隔离件。在电池单体充放电过程中,活性离 子(例如锂离子)在正极和负极之间往返嵌入和脱出。隔离件设置在正极和负极之间,可以起到防止正负极短路的作用,同时可以使活性离子通过。
在一些实施例中,正极可以为正极片,正极片可以包括正极集流体以及设置在正极集流体至少一个表面的正极活性材料。
作为示例,正极集流体具有在其自身厚度方向相对的两个表面,正极活性材料设置在正极集流体相对的两个表面的任意一者或两者上。
作为示例,正极集流体可采用金属箔片或复合集流体。例如,作为金属箔片,可采用表面镀银处理的铝、表面镀银处理的不锈钢、不锈钢、铜、铝、镍、炭精电极、碳、镍或钛等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铝、铝合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,正极活性材料可包括以下材料中的至少一种:含锂磷酸盐、锂过渡金属氧化物及其各自的改性化合物。但本申请并不限定于这些材料,还可以使用其他可被用作电池正极活性材料的传统材料。这些正极活性材料可以仅单独使用一种,也可以将两种以上组合使用。其中,含锂磷酸盐的示例可包括但不限于磷酸铁锂(如LiFePO4(也可以简称为LFP))、磷酸铁锂与碳的复合材料、磷酸锰锂(如LiMnPO4)、磷酸锰锂与碳的复合材料、磷酸锰铁锂、磷酸锰铁锂与碳的复合材料中的至少一种。锂过渡金属氧化物的示例可包括但不限于锂钴氧化物(如LiCoO2)、锂镍氧化物(如LiNiO2)、锂锰氧化物(如LiMnO2、LiMn2O4)、锂镍钴氧化物、锂锰钴氧化物、锂镍锰氧化物、锂镍钴锰氧化物(如LiNi1/3Co1/3Mn1/3O2(也可以简称为NCM333)、LiNi0.5Co0.2Mn0.3O2(也可以简称为NCM523)、LiNi0.5Co0.25Mn0.25O2(也可以简称为NCM211)、LiNi0.6Co0.2Mn0.2O2(也可以简称为NCM622)、LiNi0.8Co0.1Mn0.1O2(也可以简称为NCM811)、锂镍钴铝氧化物(如LiNi0.85Co0.15Al0.05O2)及其改性化合物等中的至少一种。
在一些实施例中,正极可以采用泡沫金属。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金、或泡沫碳等。泡沫金属作为正极时,泡沫金属表面可以不设置正极活性材料,当然也可以设置正极活性材料。作为示例,在泡沫金属内还可以填充或/和沉积有锂源材料、钾金属或钠金属,锂源材料为锂金属和/或富锂材料。
在一些实施例中,负极可以为负极片,负极片可以包括负极集流体。
作为示例,负极集流体可采用金属箔片、泡沫金属或复合集流体。例如,作为金属箔片,可以采用银表面处理的铝或不锈钢、不锈钢、铜、铝、镍、炭精电极、用碳、镍或钛等。泡沫金属可以为泡沫镍、泡沫铜、泡沫铝、泡沫合金、或泡沫碳等。复合集流体可包括高分子材料基层和金属层。复合集流体可通过将金属材料(铜、铜合金、镍、镍合金、钛、钛合金、银及银合金等)形成在高分子材料基材(如聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚苯乙烯、聚乙烯等的基材)上而形成。
作为示例,负极片可以包括负极集流体以及设置在负极集流体至少一个表面上的负极活性材料。
作为示例,负极集流体具有在其自身厚度方向相对的两个表面,负极活性材料设置在负极集流体相对的两个表面中的任意一者或两者上。
作为示例,负极活性材料可采用本领域公知的用于电池单体的负极活性材料。作为示例,负极活性材料可包括以下材料中的至少一种:人造石墨、天然石墨、软炭、硬炭、硅基材料、锡基材料和钛酸锂等。硅基材料可选自单质硅、硅氧化合物、硅碳复合物、硅氮复合物以及硅合金中的至少一种。锡基材料可选自单质锡、锡氧化合物以及锡合金中的至少一种。但本申请并不限定于这些材料,还可以使用其他可被用作电池负极活性材料的传统材料。这些负极活性材料可以仅单独使用一种,也可以将两种以上组合使用。
在一些实施例中,正极集流体的材料可以为铝,负极集流体的材料可以为铜。
在一些实施方式中,电极组件还包括隔离件,隔离件设置在正极和负极之间。
在一些实施方式中,隔离件为隔离膜。隔离膜的种类可以是多种,可以选用任意公知的具有良好的化学稳定性和机械稳定性的多孔结构隔离膜。
作为示例,隔离膜的材质可以包括玻璃纤维、无纺布、聚乙烯、聚丙烯及聚偏二氟乙烯中的至少一种。隔离膜可以是单层薄膜,也可以是多层复合薄膜。在隔离膜为多层复合薄膜时,各层的材料可以相同或不同。隔离件可以是单独的一个部件位于正负极之间,也可以附着在正负极的表面。
在一些实施方式中,隔离件为固态电解质。固态电解质设于正极和负极之间,同时起到传输离子和隔离正负极的作用。
在一些实施方式中,电池单体还包括电解质,电解质在正、负极之间起到传导离子的作用。电解质可以是液态的、凝胶态的或固态的。其中,液态电解质包括电解质盐和溶剂。
在一些实施方式中,电解质盐可以包括六氟磷酸锂、四氟硼酸锂、高氯酸锂、六氟砷酸锂、双氟磺酰亚胺锂、双三氟甲磺酰亚胺锂、三氟甲磺酸锂、二氟磷酸锂、二氟草酸硼酸锂、二草酸硼酸锂、二氟二草酸磷酸锂及四氟草酸磷酸锂中的至少一种。
在一些实施方式中,溶剂可以包括碳酸亚乙酯、碳酸亚丙酯、碳酸甲乙酯、碳酸二乙酯、碳酸二甲酯、碳酸二丙酯、碳酸甲丙酯、碳酸乙丙酯、碳酸亚丁酯、氟代碳酸亚乙酯、甲酸甲酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、丙酸甲酯、丙酸乙酯、丙酸丙酯、丁酸甲酯、丁酸乙酯、1,4-丁内酯、环丁砜、二甲砜、甲乙砜及二乙砜中的至少一种。溶剂也可选醚类溶剂。醚类溶剂可以包括乙二醇二甲醚、乙二醇二乙醚、二乙二醇二甲醚、三乙二醇二甲醚、四乙二醇二甲醚、1,3-二氧戊环、四氢呋喃、甲基四氢呋喃、二苯醚及冠醚中的一种或多种。
其中,凝胶态电解质包括以聚合物作为电解质的骨架网络,搭配离子液体-锂盐。
其中,固态电解质包括聚合物固态电解质、无机固态电解质、复合固态电解质。
作为示例,聚合物固态电解质可以为聚醚(聚氧化乙烯)、聚硅氧烷、聚碳酸酯、聚丙烯腈、聚偏氟乙烯、聚甲基丙烯酸甲酯、单离子聚合物、聚离子液体-锂盐、纤维素等。
作为示例,无机固态电解质可以包括氧化物固体电解质(晶态的钙钛矿、钠超导离子导体、石榴石、非晶态的LiPON薄膜)、硫化物固体电解质(晶态的锂超离子导体(锂锗磷硫、硫银锗矿)、非晶体硫化物)以及卤化物固体电解质、氮化物固体电解质及氢化物固体电解质中的一种或多种。
作为示例,复合固态电解质通过在聚合物固体电解质中增加无机固态电解质填料形成。
在一些实施方式中,电极组件为卷绕结构。正极片、负极片卷绕成卷绕结构。
在一些实施方式中,电极组件为叠片结构。
作为示例,正极片、负极片可分别设置多个,多个正极片和多个负极片交替层叠设置。
作为示例,正极片可设置多个,负极片折叠形成多个层叠设置的折叠段,相邻的折叠段之间夹持一个正极片。
作为示例,正极片和负极片均折叠形成多个层叠设置的折叠段。
作为示例,隔离件可设置多个,分别设置在任意相邻的正极片或负极片之间。
作为示例,隔离件可连续地设置,通过折叠或者卷绕方式设置在任意相邻的正极片或负极片之间。
在一些实施方式中,电极组件的形状可以为圆柱状,扁平状或多棱柱状等。
在一些实施方式中,电极组件设有极耳,极耳可以将电流从电极组件导出。极耳包括正极耳和负极耳。
在一些实施方式中,电池单体可以包括外壳。外壳用于封装电极组件及电解质等部件。外壳可以为钢壳、铝壳、塑料壳(如聚丙烯)、复合金属壳(如铜铝复合外壳)或铝塑膜等。
作为示例,电池单体可以为圆柱形电池单体、棱柱电池单体、软包电池单体或其它形状的电池单体,棱柱电池单体包括但不限于方壳电池单体、刀片形电池单体、多棱柱电池,多棱柱电池例如为六棱柱电池等。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。
在一些实施例中,电池可以为电池模块,电池单体有多个时,多个电池单体排列并固定形成一个电池模块。
在一些实施例中,电池可以为电池包,电池包包括箱体和电池单体,电池单体或电池模块容纳于箱体中。
在一些实施例中,箱体可以作为车辆的底盘结构的一部分。例如,箱体的部分可以成为车辆的地板的至少一部分,或者,箱体的部分可以成为车辆的横梁和纵梁的至少一部分。
在一些实施例中,电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点,是现今新能源发展的重要组成部分。电池技术的发展要同时考虑多方面的设计因素,例如,能量密度、循环寿命、放电容量、充放电倍率等性能参数,另外,还需要考虑电池的安全性。随着电池的快速发展和需求增加,对电池在使用寿命和使用可靠性等方面的需求也随之提升。
在电池技术中,对于一般的电池单体而言,为了保证电池单体的使用安全性,通常会在电池单体的外壳上设置泄压机构,以通过泄压机构泄放电池单体的内部压力,从而能够有效提升电池单体的使用安全性。在相关技术中,电池单体在使用过程中会产生一定量的气体,使得电池单体的外壳内的气压上升,从而可能导致电池单体的泄压机构在使用的过程中出现提前致动泄压的现象,以造成电池单体的使用稳定性较差,进而不利于提升电池单体的使用寿命和使用可靠性。
基于以上考虑,为了解决电池单体的使用寿命较短且使用可靠性较低的问题,本申请实施例提供了一种电池单体,电池单体包括外壳、电极组件、单向阀和遮挡件。外壳具有壁部,电极组件容纳于外壳内,单向阀设置于壁部,单向阀具有出气口,出气口用于排出外壳内部的气体。遮挡件安装于壁部,沿壁部的厚度方向,遮挡件位于单向阀背离电极组件的一侧,且遮挡件覆盖单向阀,遮挡件与壁部之间形成有排气通道,排气通道连通出气口和外壳的外部。
在这种结构的电池单体中,通过在外壳的壁部上设置单向阀,使得单向阀能够单向打开并将外壳内部的气体排出外壳的外部,从而在电池单体正常使用过程中外壳的内部产生气体时能够通过单向阀排出外壳的外部,以缓解因电池单体的内部气压上升而导致电池单体的内部压力提前达到阈值的现象,以造成电池单体出现提前致动泄压,进而能够有效提升电池单体的使用稳定性,以提升电池单体的使用寿命和使用可靠性。
此外,通过在单向阀背离电极组件的一侧设置遮挡件,且遮挡件覆盖单向阀,使得遮挡件能够对单向阀起到一定的保护和遮挡作用,一方面能够减少单向阀在外部环境下出现磨损或损坏的现象,且能够降低外部环境中的杂质或颗粒物等进入单向阀内的风险,有利于提高单向阀的使用寿命,另一方面通过遮挡件对单向阀进行遮盖能够提升电池单体的外表面的美观度,再一方面,便于在遮挡件背离单向阀的一侧对应连接检测元件等其他部件,以减少壁部设置单向阀的区域对连接检测元件等其他部件造成的干涉影响。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电装置中,还可以用于储能装置中。可以使用具备本申请公开的电池单体、电池等组成该用电装置的电源系统,这样,有利于缓解电池单体在使用的过程中出现提前开阀泄压的现象,以提升电池单体的使用寿命和使用可靠性。
本申请实施例提供一种使用电池作为电源的用电装置,用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中,电动玩具可以包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等,航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明,以本申请一实施例的一种用电装置为车辆为例进行说明。
请参照图1,图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃 气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100,电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电,例如,电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300,控制器200用来控制电池100为马达300供电,例如,用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中,电池100不仅可以作为车辆1000的操作电源,还可以作为车辆1000的驱动电源,代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2,图2为本申请一些实施例提供的电池100的结构爆炸图。电池100可以包括箱体10和电池单体20,电池单体20用于容纳于箱体10内。
其中,箱体10用于为电池单体20提供装配空间,箱体10可以采用多种结构。在一些实施例中,箱体10可以包括第一箱本体11和第二箱本体12,第一箱本体11与第二箱本体12相互盖合,第一箱本体11和第二箱本体12共同限定出用于容纳电池单体20的装配空间。第二箱本体12可以为一端开放的空心结构,第一箱本体11可以为板状结构,第一箱本体11盖合于第二箱本体12的开放侧,以使第一箱本体11与第二箱本体12共同限定出装配空间;在其他实施例中,第一箱本体11和第二箱本体12也可以是均为一侧开放的空心结构,第一箱本体11的开放侧盖合于第二箱本体12的开放侧。当然,第一箱本体11和第二箱本体12形成的箱体10可以是多种形状,比如,圆柱体或长方体等。示例性的,在图2中,箱体10的形状为长方体。
可选地,在电池100中,容纳于箱体10内的电池单体20可以是一个,也可以是多个。当容纳于箱体10内的电池单体20为多个时,多个电池单体20之间可以是串联或并联或混联,混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起,再将多个电池单体20构成的整体模块容纳于箱体10内;当然,在一些实施例中,电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式,多个电池模块再串联或并联或混联形成一个整体,并容纳于箱体10内。
在一些实施例中,电池100还可以包括其他结构,例如,该电池100还可以包括汇流部件,汇流部件设置于箱体10内,汇流部件连接多个电池单体20,以实现多个电池单体20之间的电连接。
其中,每个电池单体20可以为二次电池或一次电池;还可以是锂硫电池、钠离子电池或镁离子电池,但不局限于此。电池单体20可以是圆柱体、扁平体、长方体或其它形状等。示例性的,在图2中,电池单体20为长方体结构。
根据本申请的一些实施例,参照图3、图4、图5和图6,图3为本申请一些实施例提供的电池单体20的结构示意图,图4为本申请一些实施例提供的电池单体20的结构爆炸图,图5为本申请一些实施例提供的电池单体20的局部剖视图,图6为本申请一些实施例提供的单向阀23的结构示意图。本申请提供了一种电池单体20,电池单体20包括外壳21、电极组件22、单向阀23和遮挡件24。外壳21具有壁部211,电极组件22容纳于外壳21内。单向阀23设置于壁部211,单向阀23具有出气口231,出气口231用于排出外壳21内部的气体。遮挡件24安装于壁部211,沿壁部的厚度方向X,遮挡件24位于单向阀23背离电极组件22的一侧,且遮挡件24覆盖单向阀23,遮挡件24与壁部211之间形成有排气通道25,排气通道25连通出气口231和外壳21的外部。
其中,外壳21还可以用于容纳电解质,例如,电解液。外壳21可以是多种结构形式,比如,圆柱体或长方体等。同样的,外壳21的材质也可以是多种,比如,铜、铁、铝、钢或铝合金等。
在一些实施例中,外壳21可以包括壳体212和端盖213,壳体212的内部形成有容纳腔,容纳腔用于容纳电极组件22,且容纳腔具有开口2121,也就是说,壳体212为一端开口2121的空心结构,端盖213盖合于壳体212的开口2121处并形成密封连接,以形成用于容纳电极组件22和电解质的密封空间。
需要说明的是,用于安装单向阀23的壁部211可以是外壳21的端盖213,也可以是外壳21的壳体212的一个壁。示例性的,在图3中,壁部211为端盖213。当然,电池单体20的结构并不局限于此,在其他实施例中,壁部211也可以为壳体212与端盖213相对设置的底壁,壁部211还可以是壳体212与端盖213相邻且相互连接的侧壁。
在组装电池单体20时,可以先将电极组件22放入壳体212内,并向壳体212内填充电解液,之后再将端盖213盖合于壳体212的开口2121,以完成电池单体20的组装。
壳体212可以是多种形状,比如,圆柱体、长方体或棱柱结构等。壳体212的形状可根据电极组件22的具体形状来确定。比如,若电极组件22为圆柱体结构,则可选用圆柱体结构的壳体212;若电极组件22为长方体结构,则可选用长方体结构的壳体212。当然,端盖213的结构也可以是多种,比如,端盖213为板状结构或一端开放的空心结构等。示例性的,在图3中,壳体212为长方体结构。
当然,可理解的,外壳21并不仅仅局限于上述结构,外壳21也可以是其他结构,比如,外壳21可以包括壳体212和两个端盖213,壳体212为相对的两侧开口2121的空心结构,一个端盖213对应盖合于壳体212的一个开口2121处并形成密封连接,以形成用于容纳电极组件22和电解质的密封空间,也就是说,壳体212在相对的两侧上均形成有开口2121,且两个端盖213分别盖合于壳体212的两侧,以封闭对应的开口2121。
需要说明的是,电极组件22是电池单体20中发生电化学反应的部件,电极组件22的结构可以是多种,比如,电极组件22可以是由正极片、隔离件和负极片通过卷绕形成的卷绕式结构,也可以是由正极片、隔离件和负极片通过层叠布置形成的层叠式结构。
示例性的,隔离件为隔离膜,隔离膜的主要材质可选自玻璃纤维、无纺布、聚乙烯、聚丙烯以及聚偏二氟乙烯中的至少一种。
可选地,容纳于外壳21内的电极组件22可以是一个,也可以是多个。示例性的,在图3中,电池单体20的外壳21设置有两个电极组件22,两个电极组件22沿其厚度方向层叠设置,也就是说,两个电极组件22沿电池单体20的厚度方向层叠设置。当然,在其他实施例中,容纳于外壳21内的电极组件22也可以为一个、三个、 四个、五个、六个、七个或八个等。
需要说明的是,单向阀23设置于壁部211,单向阀23用于排出外壳21内部的气体,即单向阀23能够单向打开进行排气,以使外壳21内部的气体能够通过单向阀23排出外壳21的外部,可选地,单向阀23设置于壁部211上的结构可以是多种,可以是单向阀23焊接于壁部211上,也可以是单向阀23卡接于壁部211上,还可以是单向阀23粘接于壁部211上。其中,外壳21的外部是指电池单体20的外部环境。
示例性的,在图5中,壁部211上设置有安装孔2111,安装孔2111连通外壳21的内部和外壳21的外部,单向阀23的部分装配至安装孔2111内,并沿壁部的厚度方向X延伸至外壳21的内部,单向阀23与安装孔2111的孔壁面之间密封连接。
遮挡件24安装于壁部211,沿壁部的厚度方向X,遮挡件24位于单向阀23背离电极组件22的一侧,即遮挡件24与单向阀23为沿壁部的厚度方向X排布的结构,且遮挡件24相较于单向阀23更远离电极组件22。可选地,遮挡件24安装于壁部211上的结构可以是多种,比如,遮挡件24可以是通过焊接、过盈配合、螺栓螺接、卡接或粘接等方式安装于壁部211上。
遮挡件24覆盖单向阀23,即单向阀23在壁部的厚度方向X上的投影位于遮挡件24内。
遮挡件24与壁部211之间形成有排气通道25,排气通道25连通出气口231和外壳21的外部,即遮挡件24与壁部211共同界定出连通单向阀23的出气口231和外壳21的外部的排气通道25,使得单向阀23通过出气口231排出外壳21内部的气体能够进入排气通道25后排出外壳21的外部。
示例性的,遮挡件24的材质可以是铜、铁、铝、钢或铝合金等。
在一些实施例中,电池单体20还可以包括电极端子26,电极端子26绝缘安装于外壳21上,且电极端子26与电极组件22电连接,以输出或输入电池单体20的电能。
需要说明的是,电极端子26绝缘安装于外壳21上,也就是说,电极端子26与外壳21之间未形成电连接。
其中,在图3中,电池单体20包括两个电极端子26,对应的,每个电极组件22具有两个极耳221,且两个极耳221的极性相反,两个电极端子26分别与电极组件22的两个极耳221电连接,以实现电池单体20的正极和负极的输入或输出。需要说明的是,电极组件22的极耳221为正极片上未涂覆正极活性物质层的区域相互层叠连接形成的部件或负极片上未涂覆负极活性物质层的区域相互层叠连接形成的部件。若极耳221用于输出电极组件22的正极,则极耳221为正极片上未涂覆正极活性物质层的区域相互层叠连接形成的部件;若极耳221用于输出电极组件22的负极,则极耳221为负极片上未涂覆负极活性物质层的区域相互层叠连接形成的部件。
示例性的,电极端子26的材质也可以是多种,比如,电极端子26的材质可以是铜、铁、铝、钢或铝合金等。
电极端子26安装于外壳21上的结构可以是多种,示例性的,在图3中,两个电极端子26均安装于外壳21的端盖213上。当然,电池单体20的结构并不仅仅局限于此,在其他实施例中,两个电极端子26也可以是均安装于外壳21的壳体212上,同样的,两个电极端子26还可以是一个电极端子26安装于外壳21的壳体212上,另一个电极端子26安装于外壳21的端盖213上。
在一些实施例中,电池单体20还可以包括泄压机构27,泄压机构27安装于外壳21上。可选地,泄压机构27可以是设置于外壳21的端盖213上,也可以是设置于外壳21的壳体212上,泄压机构27用于在电池单体20的内部压力或温度达到预定值时泄放电池单体20内部的压力。
示例性的,在图3中,泄压机构27设置于外壳21的端盖213上,泄压机构27可以是诸如防爆阀、防爆片、泄压阀或安全阀等泄压部件。
通过在外壳21的壁部211上设置单向阀23,使得单向阀23能够单向打开并将外壳21内部的气体排出外壳21的外部,从而在电池单体20正常使用过程中外壳21的内部产生气体时能够通过单向阀23排出外壳21的外部,以缓解因电池单体20的内部气压上升而导致电池单体20的内部压力提前达到阈值的现象,以造成电池单体20出现提前致动泄压,进而能够有效提升电池单体20的使用稳定性,以提升电池单体20的使用寿命和使用可靠性。此外,通过在单向阀23背离电极组件22的一侧设置遮挡件24,且遮挡件24覆盖单向阀23,使得遮挡件24能够对单向阀23起到一定的保护和遮挡作用,一方面能够减少单向阀23在外部环境下出现磨损或损坏的现象,且能够降低外部环境中的杂质或颗粒物等进入单向阀23内的风险,有利于提高单向阀23的使用寿命,另一方面通过遮挡件24对单向阀23进行遮盖能够提升电池单体20的外表面的美观度,再一方面,便于在遮挡件24背离单向阀23的一侧对应连接检测元件等其他部件,以减少壁部211设置单向阀23的区域对连接检测元件等其他部件造成的干涉影响。
根据本申请的一些实施例,参见图3、图4和图5所示,沿壁部的厚度方向X,壁部211具有背离电极组件22的第一表面2112,第一表面2112设置有安装槽2113,安装槽2113的槽底面设置有安装孔2111,单向阀23的至少部分设置于安装孔2111内,遮挡件24的至少部分容纳于安装槽2113内。
其中,第一表面2112设置有安装槽2113,安装槽2113的槽底面设置有安装孔2111,即安装孔2111贯穿安装槽2113的槽底面,使得安装孔2111通过安装槽2113与外壳21的外部连通。
遮挡件24的至少部分容纳于安装槽2113内,即遮挡件24可以是整体均位于安装槽2113内,也可以是仅部分位于安装槽2113内,示例性的,在图5中,遮挡件24整体均位于安装槽2113内。
通过在壁部211背离电极组件22的第一表面2112上设置安装槽2113,且遮挡件24的至少部分容纳于安装槽2113内,一方面能够减少遮挡件24与壁部211在壁部的厚度方向X上的占用空间,有利于优化电池单体20的体积,另一方面通过安装槽2113能够对遮挡件24起到一定的定位和限位作用,有利于降低遮挡件24连接在壁部211上的装配难度。
根据本申请的一些实施例,参照图4和图5,并请进一步参照图7和图8,图7为本申请一些实施例提供的电池单体20的俯视图,图8为图7所示的电池单体20的A处的局部放大图。排气通道25可以包括第一排气间隙251,第一排气间隙251形成于遮挡件24与安装槽2113的槽侧面之间,第一排气间隙251用于连通出气口231和外壳21的外部。
其中,第一排气间隙251起到连通出气口231和外壳21的外部的作用,第一排气间隙251可以是与出气口231直接连通,比如,第一排气间隙251在壁部的厚度方向X上的投影的至少部分位于安装孔2111内,使得设置于安装孔2111内的单向阀23的出气口231能够与第一排气间隙251直接连通,当然,第一排气间隙251也可以是与出气口231间接连通,比如,在图5中,排气通道25还可以包括第二排气间隙252,第二排气间隙252形成于遮挡件24与安装槽2113的槽底面之间,第二排气间隙252连通第一排气间隙251和单向阀23的出气口231。
通过在遮挡件24与安装槽2113的槽侧面之间形成与外壳21的外部连通的第一排气间隙251,使得单向阀23排出的气体能够通过第一排气间隙251排出外壳21的外部,采用这种结构能够的电池单体20无需在遮挡件24上开设孔道,有利于降低加工难度,且能够提升电池单体20外观的美观度。
需要说明的是,遮挡件24与安装槽2113的槽侧面之间形成的第一排气间隙251的结构可以是多种,根据本申请的一些实施例,参照图7和图8,并请进一步参照图9,图9为本申请一些实施例提供的遮挡件24的结构示意图。遮挡件24的外周面包括第一拐角面241和至少两个第一侧面242,第一拐角面241连接相邻的两个第一侧面242。安装槽2113的槽侧面包括第二拐角面2113a和至少两个第二侧面2113b,第二拐角面2113a连接相邻的两个第二侧面2113b,每个第二侧面2113b与一个第一侧面242相连,第二拐角面2113a与第一拐角面241之间形成第一排气间隙251。
其中,第一拐角面241连接相邻的两个第一侧面242,即在遮挡件24的周向上,第一拐角面241位于两个第一侧面242之间,且连接两个第一侧面242,也就是说,第一拐角面241为遮挡件24的外周面的拐角处的表面。
第二拐角面2113a连接相邻的两个第二侧面2113b,即在安装槽2113的周向上,第二拐角面2113a位于两个第二侧面2113b之间,且连接两个第二侧面2113b,也就是说,第二拐角面2113a为安装槽2113的槽侧面的拐角处的表面。
遮挡件24的每个第一侧面242与安装槽2113的槽侧面中对应的第二侧面2113b相互抵接并相连,以使遮挡件24的第一拐角面241与安装槽2113的槽侧面的第二拐角面2113a面向设置,使得在第一拐角面241和第二拐角面2113a之间形成第一排气间隙251。
可选地,第一侧面242和第二侧面2113b的连接结构可以是多种,比如,焊接、粘接或过盈配合等。
示例性的,在图7和图8中,遮挡件24和安装槽2113均为矩形结构,使得遮挡件24的四个拐角处对应形成有四个第一拐角面241,对应的,安装槽2113的槽侧面的四个拐角处对应形成有四个第二拐角面2113a,以使遮挡件24与安装槽2113的槽侧面之间形成有四个第一排气间隙251。
遮挡件24的外周面中相邻的两个第一侧面242通过第一拐角面241相连,且安装槽2113的槽侧面中相连的两个第二侧面2113b通过第二拐角面2113a相连,每个第一侧面242与一个第二侧面2113b相连,且在第一拐角面241和第二拐角面2113a之间形成第一间隙,也就是说,遮挡件24与安装槽2113的拐角处形成第一排气间隙251,一方面便于在遮挡件24的外周面与安装槽2113的槽侧面之间形成第一排气间隙251,结构简单,且便于实现,另一方面在实现遮挡件24的外周面与安装槽2113的槽侧面之间形成有第一排气间隙251的同时有利于提高遮挡件24的外周面与安装槽2113的槽侧面之间的连接面积,有利于提高遮挡件24连接于壁部211上的牢固性。
在一些实施例中,参见图7、图8和图9所示,第一拐角面241和第二拐角面2113a均为圆弧面,第一拐角面241的半径大于第二拐角面2113a的半径。
其中,第一拐角面241和第二拐角面2113a均为圆弧面,即第一拐角面241为遮挡件24的外周面的圆角处形成的表面,同样的,第二拐角面2113a为安装槽2113的槽侧面的圆角处形成的表面。当然,在其他实施例中,第一拐角面241也可以为遮挡件24的外周面的倒角处形成的表面,第二拐角面2113a也可以为安装槽2113的槽侧面的倒角处形成的表面。
第一拐角面241的半径大于第二拐角面2113a的半径,即遮挡件24的外周面的圆角的直径大于安装槽2113的槽侧面的圆角的直径。
通过将第一拐角面241和第二拐角面2113a均设置为圆弧面,且第一拐角面241的半径大于第二拐角面2113a的半径,以实现在第一拐角面241和第二拐角面2113a之间形成有第一排气间隙251,结构简单,且便于制造和加工。
在一些实施例中,第一侧面242与第二侧面2113b焊接连接。
通过将第一侧面242与第二侧面2113b设置为相互焊接的结构,从而有利于提高遮挡件24与安装槽2113的槽侧面之间的连接牢固性,以提升遮挡件24装配至壁部211上的结构稳定性。
在一些实施例中,请继续参见图7、图8和图9所示,遮挡件24在垂直于壁部的厚度方向X上的横截面为矩形,遮挡件24的外周面包括四个第一侧面242和四个第一拐角面241,至少一个第一拐角面241处形成有第一排气间隙251。
其中,遮挡件24在垂直于壁部的厚度方向X上的横截面为矩形,即遮挡件24为矩形结构,对应的,安装槽2113的形状与遮挡件24相互契合,安装槽2113也为矩形结构。
至少一个第一拐角面241处形成有第一排气间隙251,即遮挡件24的四个第一拐角面241中可以是只有一个第一拐角面241所在的位置形成有第一排气间隙251,也可以是两个、三个或四个第一拐角面241所在的位置形成有第一排气间隙251。
需要说明的是,在其他实施例中,遮挡件24在垂直于壁部的厚度方向X上的横截面也可以是三角形、五边形、六边形或梯形等。
通过将遮挡件24设置为矩形板状结构,以使遮挡件24的四个边形成四个第一侧面242,且在遮挡件24的四个直角处形成有四个第一拐角面241,结构简单,且便于制造。
根据本申请的一些实施例,遮挡件24与安装槽2113的槽侧面之间形成的第一排气间隙251还可以是其他结构,比如,参照图10,图10为本申请又一些实施例提供的遮挡件24的结构示意图。遮挡件24的外周面设置有凹槽243,凹槽243的槽底面与安装槽2113的槽侧面之间形成第一排气间隙251。
其中,遮挡件24的外周面用于与安装槽2113的槽侧面相互连接,以实现遮挡件24安装于安装槽2113内。通过在遮挡件24的外周面上设置凹槽243,使得遮挡件24在设置有凹槽243的位置形成有缺口,从而遮挡件24在设置有凹槽243的位置与安装槽2113的槽侧面共同界定出第一排气间隙251。
可选地,遮挡件24的外周面与安装槽2113的槽侧面的连接结构可以是多种,比如,焊接或粘接等。
可选地,设置于遮挡件24的外周面上的凹槽243的数量可以是一个,也可以是多个,当遮挡件24的外周面上设置有多个凹槽243时,多个凹槽243沿遮挡件24的周向间隔排布。
示例性的,在图10中,遮挡件24为矩形结构,遮挡件24的四条直边中的两条直边上设置有凹槽243,当然,在其他实施例中,遮挡件24的外周面上设置的凹槽243的数量也可以是三个、四个或五个等,同样的,遮挡件24的形状也可以是三角形、梯形或圆形等。
通过在遮挡件24的外周面上设置凹槽243,以使凹槽243的槽底面与安装槽2113的槽侧面之间形成有用于排气的第一排气间隙251,结构简单,且便于制造。
在一些实施例中,遮挡件24的外周面未设置凹槽243的区域与安装槽2113的槽侧面焊接连通。
通过将遮挡件24的外周面未设置凹槽243的区域与安装槽2113的槽侧面相互焊接,以实现遮挡件24连接于安装槽2113的槽侧面上,采用这种结构的电池单体20有利于遮挡件24与壁部211的连接牢固性,以提升遮挡件24装配至壁部211上的结构稳定性。
根据本申请的一些实施例,遮挡件24与安装槽2113的槽侧面之间形成的第一排气间隙251还可以是其他结构,比如,参照图11,图11为本申请再一些实施例提供的遮挡件24的结构示意图。遮挡件24的外周面凸设有多个凸部244,多个凸部244沿遮挡件24的周向间隔排布,凸部244抵接于安装槽2113的槽侧面,遮挡件24的外周面未设置凸部244的区域与安装槽2113的槽侧面之间形成第一排气间隙251。
其中,凸部244抵接于安装槽2113的槽侧面,以使相邻的两个凸部244之间形成有空腔,从而使得遮挡件24的外周面、安装槽2113的槽侧面以及相邻的两个凸部244之间共同界定出第一排气间隙251。
可选地,在这种实施例中,遮挡件24装配在安装槽2113内的结构可以是多种,比如,遮挡件24可以是通过抵接部与安装槽2113的槽侧面过盈配合、焊接或粘接等方式装配至安装槽2113内。
通过遮挡件24的外周面凸设有沿遮挡件24的周向间隔排布的多个凸部244,且凸部244抵接于安装槽2113的槽侧面上,使得遮挡件24的外周面未设置凸部244的区域与安装槽2113的槽侧面之间形成用于排气的第一排气间隙251,也就是说,第一排气间隙251位于相邻的两个凸部244之间,结构简单,且便于装配。
在一些实施例中,凸部244与安装槽2113的槽侧面过盈配合。
通过将遮挡件24的外周面凸设的凸部244与安装槽2113的槽侧面相互过盈配合,以实现遮挡件24固定于安装槽2113内,采用这种结构的电池单体20在实现相邻的两个凸部244之间形成第一排气间隙251的同时便于将遮挡件24安装于壁部211上,有利于降低遮挡件24的装配难度。
需要说明的是,在一些实施例中,第一排气间隙251还可以是其他结构,比如,可以是在安装槽2113的槽侧面上设置透气槽,以使透气槽的槽底面与遮挡件24的外周面之间形成第一排气间隙251。
根据本申请的一些实施例,参照图5,并请进一步参照图12,图12为本申请一些实施例提供的遮挡件24的仰视图。排气通道25还可以包括第二排气间隙252,第二排气间隙252形成于遮挡件24与安装槽2113的槽底面之间,第二排气间隙252连通第一排气间隙251和出气口231。
其中,第二排气间隙252形成于遮挡件24与安装槽2113的槽底面之间,可以是遮挡件24与安装槽2113的槽底面沿壁部的厚度方向X间隔排布,以使遮挡件24面向安装槽2113的槽底面的表面与安装槽2113的槽底面之间形成第二排气间隙252,也可以是遮挡件24面向安装槽2113的槽底面的表面上设置有第一槽2451,以使第一槽2451的槽底面与安装槽2113的槽底面之间形成第二排气间隙252。
需要说明的是,在其他实施例中,也可以通过在安装槽2113的槽底面上设置第一槽2451,以使第一槽2451的槽底面与遮挡件24面向安装槽2113的槽底面的表面之间形成第二排气间隙252。
排气通道25还包括形成于遮挡件24与安装槽2113的槽底面之间的第二排气间隙252,且第二排气间隙252连通第一排气间隙251和出气口231,以缓解因遮挡件24抵靠于安装槽2113的槽底面上后造成出气口231与第一排气间隙251之间出现排气受阻的现象,从而能够提升气体从单向阀23的出气口231排放至第一排气间隙251的顺畅度。
在一些实施例中,请继续参见图5和图12所示,沿壁部的厚度方向X,遮挡件24具有面向单向阀23的第二表面245,第二表面245搭接于安装槽2113的槽底面,第二表面245设置有第一槽2451,第一槽2451的槽底面与安装槽2113的槽底面之间形成第二排气间隙252。
其中,第二表面245搭接于安装槽2113的槽底面,即第二表面245的部分与安装槽2113的槽底面相互抵接,也就是说,沿壁部的厚度方向X,遮挡件24抵靠于安装槽2113的槽底面上。
第一槽2451的槽底面与安装槽2113的槽底面之间形成第二排气间隙252,即第一槽2451的槽底面、第一槽2451的槽侧面以及安装槽2113的槽底面共同界定第二排气间隙252。
通过将遮挡件24的第二表面245搭接于安装槽2113的槽底面上,使得遮挡件24抵靠于安装槽2113的槽底面上,以提升遮挡件24安装于安装槽2113内的结构稳定性和可靠性,此外,通过在第二表面245上设置第一槽2451,以使第一槽2451的槽底面与安装槽2113的槽底面之间形成第二排气间隙252,使得单向阀23的出气口231排出的气体能够通过第一槽2451进入至第一排气间隙251后排出外壳21的外部,从而在实现遮挡件24抵靠于安装槽2113的槽底面上的同时能够通过第一槽2451实现第一排气间隙251与出气口231的连通。
在一些实施例中,参见图5、图7、图8和图12所示,遮挡件24与安装槽2113的槽侧面之间形成有多个第一排气间隙251,多个第一排气间隙251沿遮挡件24的周向间隔排布,第二表面245上设置有多个第一槽2451,每个第一排气间隙251与一个第一槽2451连通。
在第一排气间隙251形成于第一拐角面241和第二拐角面2113a之间的实施例中,参见图12所示,第一槽2451沿遮挡件24的径向延伸,且第一槽2451贯穿第一拐角面241,以使第一槽2451的槽底面与安装槽2113的槽底面之间形成的第二排气间隙252能够与第一拐角面241和第二拐角面2113a之间形成的第一排气间隙251连通。当然,在第一排气间隙251为形成于遮挡件24的凹槽243的槽底面与安装槽2113的槽侧面之间的实施例中,则第一槽2451贯穿凹槽243的槽底面,同样的,在第一排气间隙251为形成于遮挡件24的外周面未设置凸部244的区域与安装槽2113的槽侧面之间的实施例中,则第一槽2451贯穿遮挡件24的外周面未设置凸部244的区域。
示例性的,在图12中,遮挡件24具有四个第一拐角面241,且每个第一拐角面241处均形成有第一排气间隙251,对应的,遮挡件24的第二表面245上设置有四个第一槽2451,每个第一槽2451贯穿一个第一拐角面241。
通过在遮挡件24与安装槽2113的槽侧面之间形成有多个第一排气间隙251,且每个第一排气间隙251与一个第一槽2451连通,从而有利于进一步提高排气效率。
根据本申请的一些实施例,参见图5和图12所示,第二表面245还设置有第二槽2452,多个第一槽2451设置于第二槽2452的周围并均与第二槽2452连通,第二槽2452与出气口231连通。
示例性的,遮挡件24的第二表面245上设置有四个第一槽2451,四个第一槽2451沿第二槽2452的周向间隔排布,第一槽2451沿遮挡件24的径向延伸并贯穿第二槽2452的槽侧面,以使第一槽2451能够通过第二槽2452与出气口231连通,从而使得第二排气间隙252能够通过第二槽2452与出气口231连通。
通过在遮挡件24面向单向阀23的第二表面245上设置第二槽2452,第二槽2452与单向阀23的出气口231连通,且多个第一槽2451设置在第二槽2452的周围并均与第二槽2452连通,以使单向阀23的出气口231排出的气体能够进入第二槽2452内后通过多个第一槽2451再分别经过对应的第一排气间隙251排出外壳21的外部,有利于提高排气效率,且能够缓解气体堆积在遮挡件24与单向阀23之间的现象。
在一些实施例中,参见图5所示,沿壁部的厚度方向X,出气口231设置于单向阀23背离电极组件22的一端,出气口231面向第二槽2452设置,且出气口231的投影位于第二槽2452内。
示例性的,单向阀23在壁部的厚度方向X上的投影整体位于第二槽2452内。
通过将单向阀23的出气口231和第二槽2452设置为相互面向设置的结构,且出气口231在壁部的厚度方向X上的投影位于第二槽2452内,使得第二槽2452为在壁部的厚度方向X覆盖出气口231的结构,以使单向阀23的出气口231排出的气体能够直接进入至第二槽2452内,有利于提高排气顺畅度和排气效率。
根据本申请的一些实施例,参见图5所示,沿壁部的厚度方向X,遮挡件24不超出第一表面2112。
其中,遮挡件24不超出第一表面2112,即遮挡件24在壁部的厚度方向X上未延伸出安装槽2113,使得遮挡件24的整体均位于安装槽2113内。
通过将遮挡件24设置为在壁部的厚度方向X上不超出壁部211背离电极组件22的第一表面2112,从而通过安装槽2113能够对遮挡件24起到一定的保护作用,以进一步减少遮挡件24的磨损现象。
在一些实施例中,请继续参见图5所示,遮挡件24具有背离单向阀23的第三表面246,第三表面246与第一表面2112平齐。
通过将遮挡件24背离单向阀23的第三表面246与壁部211背离电极组件22的第一表面2112设置为相互平齐的结构,从而有利于进一步提升电池单体20的外表面的美观度,且便于在遮挡件24的第三表面246上设置信息码或连接检测元件等其他部件。
需要说明的是,信息码可以为二维码、条形码、数字或文字,通过扫描或人工输入信息码等方式获取电池单体20的信息。检测元件可以包括电路板以及电连接于电路板的采样端子,采样端子包括金属片(如镍片)、温度传感器等。
根据本申请的一些实施例,参见图5所示,沿壁部的厚度方向X,单向阀23不超出安装槽2113的槽底面。
其中,单向阀23不超出安装槽2113的槽底面,也就是说,单向阀23设置于安装孔2111内,且在壁部的厚度方向X上未延伸至安装槽2113内。
示例性的,在图5中,单向阀23在壁部的厚度方向X上背离电极组件22的一端的端面与安装槽2113的槽底面平齐,且单向阀23在壁部的厚度方向X上的投影位于第二槽2452内,使得单向阀23与第二槽2452的槽底面为沿壁部的厚度方向X间隔排布的结构,单向阀23在壁部的厚度方向X上面向电极组件22的一端凸出于壁部211面向电极组件22的表面,以使单向阀23的部分延伸至外壳21内。
通过将单向阀23设置为在壁部的厚度方向X上不超出安装槽2113的槽底面,也就是说,设置于安装孔2111内的单向阀23未延伸至安装槽2113内,从而能够减少单向阀23与设置于安装槽2113内的遮挡件24之间的干涉现象,且便于单向阀23进行排气。
根据本申请的一些实施例,遮挡件24与壁部211固定连接。
可选地,遮挡件24与壁部211固定连接的结构可以是多种,比如,遮挡件24可以通过焊接、粘接或过盈配合等方式连接于壁部211上。
通过将遮挡件24设置为与壁部211相互固定连接的结构,有利于降低遮挡件24在使用过程中从壁部211上脱离的风险,且能够提升遮挡件24与壁部211之间的连接牢固性,以便于在遮挡件24上设置信息码或连接检测元件等其他部件。
根据本申请的一些实施例,参照图5和图6,并请进一步参照图13和图14,图13为本申请一些实施例提供的单向阀23的结构爆炸图,图14为本申请一些实施例提供的单向阀23的剖视图。单向阀23可以包括阀体232、弹性件233和封堵件234。阀体232设置于壁部211,阀体232的内部形成有安装腔2321,阀体232上设置有进气口2322和出气口231,进气口2322用于连通安装腔2321和外壳21的内部,出气口231用于连通安装腔2321和排气通道25。弹性件233设置于安装腔2321内。封堵件234可移动地设置于安装腔2321内,封堵件234用于在弹性件233的作用下封堵进气口2322,且用于在外壳21内部的气体的作用下打开进气口2322。
其中,进气口2322用于连通安装腔2321和外壳21的内部,即外壳21内部的气体能够通过进气口2322进入至安装腔2321内,同样的,出气口231用于连通安装腔2321和排气通道25,即外壳21内部进入安装腔2321内的气体能够通过出气口231进入排气通道25内,再通过排气通道25排放至外壳21的外部。
封堵件234可移动地设置于安装腔2321内,即封堵件234能够在安装腔2321内移动,以使封堵件234能够在向靠近进气口2322移动时能够对进气口2322进行封堵,反之,在封堵件234远离进气口2322移动时能够对进气口2322进行打开。
封堵件234用于在弹性件233的作用下封堵进气口2322,且用于在外壳21内部的气体的作用下打开进气口2322,也就是说,弹性件233能够为封堵件234提供弹性力,使得封堵件234能够抵接于安装腔2321的腔底面上,以对进气口2322进行封堵,反之,在外壳21内部的气体作用在封堵件234上的作用力大于弹性件233的弹性力时,外壳21内部的气体能够克服弹性件233的弹性力并推动封堵件234与安装腔2321的腔底面分离,以实现封堵件234打开进气口2322,从而使得外壳21内部的气体能够通过进气口2322进入安装腔2321内后再通过出气口231排出。
可选地,弹性件233为具有弹性的部件,其结构可以是多种,比如,弹片、弹簧或弹性橡胶等。示例性的,在图13和图14中,弹性件233为弹簧。当然,在其他实施例中,弹性件233和封堵件234也可以整体为一个弹性部件,比如,弹性橡胶等。
需要说明的是,出气口231在壁部的厚度方向X上的投影可以是位于弹簧的内部,也可以是位于弹簧的外部,当出气口231为多个时,多个出气口231在壁部的厚度方向X上的投影可以是均位于弹簧的内部,也可以是环绕于弹簧的外部,当然,在一些实施例中,也可以是部分位于弹簧的内部,部分位于弹簧的外部。
单向阀23设置有阀体232、弹性件233和封堵件234,阀体232设置于壁部211上,阀体232上设置连通安装腔2321和外壳21内部的进气口2322以及连接安装腔2321和排气通道25的出气口231,通过将弹性件233和封堵件234均设置于安装腔2321内,使得弹性件233能够为封堵件234施加弹性力,以使封堵件234能够封堵进气口2322,以阻止外壳21的外部的气体进入至外壳21的内部,且在外壳21内部的压力上升时外壳21内部的气体能够作用在封堵件234上并克服弹性件233的弹力,以使封堵件234能够打开进气口2322,从而使得外壳21内部的气体能够通过单向阀23单向打开后排出,以实现单向阀23的单向排气功能。
根据本申请的一些实施例,参见图5、图6、图13和图14所示,阀体232可以包括阀本体2323和阀盖2324。阀本体2323设置于壁部211,阀本体2323设置有进气口2322。沿壁部的厚度方向X,阀盖2324设置于阀本体2323背离电极组件22的一端,阀盖2324与阀本体2323共同围合形成安装腔2321,阀盖2324设置有出气口231。
其中,壁部211上设置有安装孔2111,阀本体2323安装于安装孔2111内,且阀本体2323沿壁部的厚度方向X延伸至外壳21内,即阀本体2323沿壁部的厚度方向X凸出于壁部211面向电极组件22的表面。
阀本体2323安装于壁部211上的结构可以是多种,比如,阀本体2323可以是焊接连接于安装孔2111的孔壁面上,也可以是通过密封胶粘接于安装孔2111的孔壁面。
示例性的,进气口2322设置于阀本体2323在壁部的厚度方向X上靠近电极组件22的一端,即进气口2322贯穿安装腔2321的腔底面,对应的,封堵件234沿壁部的厚度方向X可移动地设置于安装腔2321内,使得封堵件234在抵接于安装腔2321的腔底面时能够对进气口2322进行封堵。当然,在其他实施例中,进气口2322也可以是设置于阀本体2323在阀本体2323的径向上的一侧,对应的,封堵件234沿阀本体2323的径向可移动地设置于安装腔2321内。
示例性的,出气口231为设置于阀盖2324上的第一通孔,第一通孔沿壁部的厚度方向X贯穿阀盖2324的两侧,在图13中,阀盖2324上设置有三个出气口231,三个出气口231环绕安装孔2111的中心轴线设置。当然,在其他实施例中,设置于阀盖2324上的出气口231也可以是一个、两个、四个或五个等。
作为示例,设置于阀盖2324上的出气口231为多个,多个出气口231等间隔排列。
作为示例,多个出气口231围绕阀盖2324的中心等间隔排列,这样可以使气体流出更为顺畅。
在一些实施例中,参见图13和图14所示,阀盖2324连接于阀本体2323,阀本体2323背离电极组件22的一端设置有沉槽2323a,阀盖2324的至少部分容纳于沉槽2323a内。通过在阀本体2323背离电极组件22的一端上设置沉槽2323a,且阀盖2324的至少部分容纳于沉槽2323a内,采用这种结构的单向阀23一方面能够节省阀体232在壁部的厚度方向X上的占用空间,另一方面能够提高阀盖2324装配在阀本体2323上的结构稳定性,且能够对阀盖2324起到一定的保护作用,以减少阀盖2324出现磨损或损坏的现象。
其中,安装腔2321贯穿沉槽2323a的槽底面,阀盖2324装配于沉槽2323a内并与沉槽2323a的槽底面 抵接,以使阀盖2324与阀本体2323围合形成安装腔2321。
阀盖2324的至少部分容纳于沉槽2323a内,即阀盖2324可以是整体位于沉槽2323a内,也可以是部分位于沉槽2323a内,也就是说,在壁部的厚度方向X上,阀盖2324可以是延伸出沉槽2323a,也可以是未延伸出沉槽2323a,示例性的,在图14中,阀盖2324整体位于沉槽2323a内。
示例性的,阀本体2323的材质可以是金属材质,比如,铜、铁、铝、钢或铝合金等。同样的,阀盖2324的材质也可以是金属材质,比如,铜、铁、铝、钢或铝合金等。其中,阀本体2323和阀盖2324可以是相同材质,也可以是不同材质。
单向阀23的阀体232包括阀本体2323和阀盖2324,通过将阀盖2324连接于阀本体2323在壁部的厚度方向X上背离电极组件22的一端,以使阀盖2324与阀本体2323共同界定用于容纳弹性件233和封堵件234的安装腔2321,采用这种结构的单向阀23将阀体232设置为两个部分,从而便于将弹性件233和封堵件234装配至安装腔2321内,有利于降低单向阀23的装配难度。
根据本申请的一些实施例,参见图5、图13和图14所示,沿壁部的厚度方向X,阀盖2324与封堵件234间隔设置,弹性件233的两端分别抵靠于阀盖2324和封堵件234,进气口2322设置于安装腔2321的腔底面。
其中,阀盖2324与安装腔2321的腔底面面向设置,弹性件233在壁部的厚度方向X上的两端分别抵接于阀盖2324和封堵件234,使得弹性件233被压缩在阀盖2324和封堵件234之间,以使弹性件233能够为封堵件234提供弹性力,从而使得封堵件234能够在弹性件233的弹性力的作用下对设置于安装腔2321的腔底面上的进气口2322进行封堵。
在一些实施例中,参见图13和图14所示,阀盖2324面向封堵件234的一侧凸设有第一导向柱2324a,弹性件233的部分套设于第一导向柱2324a的外侧。通过在阀盖2324面向封堵件234的一侧凸设第一导向柱2324a,且弹性件233的部分套设于第一导向柱2324a的外侧,采用这种结构的单向阀23一方面通过第一导向柱2324a能够对弹性件233起到一定的定位作用,以便于对弹性件233进行装配,有利于降低弹性件233的装配难度,另一方面通过第一导向柱2324a能够在弹性件233沿壁部的厚度方向X被压缩时起到一定的导向作用,以减少弹性件233在被压缩的过程中出现径向变形的现象,从而能够实现弹性件233沿壁部的厚度方向X稳定地被压缩,有利于提高弹性件233的使用可靠性,进而能够降低封堵件234出现误开启进气口2322的风险。
其中,弹性件233为弹簧,弹簧的部分套设于第一导向柱2324a的外侧,且弹簧远离封堵件234的一端抵接于阀盖2324凸设有第一导向柱2324a的表面上,即第一导向柱2324a插设于弹簧内。
示例性的,第一导向柱2324a的中心轴线与安装孔2111的中心轴线重合,且弹性件233的中心轴线与第一导向柱2324a的中心轴线重合。
需要说明的是,在阀盖2324上设置有多个出气口231的实施例中,多个出气口231环绕于第一导向柱2324a的外侧,当然,在其他实施例中,出气口231也可以是沿壁部的厚度方向X贯穿第一导向柱2324a的结构。
通过将阀盖2324与封堵件234设置为沿壁部的厚度方向X间隔排布的结构,使得弹性件233的两端能够分别抵靠于阀盖2324和封堵件234,以实现封堵件234能够在弹性件233的作用下沿壁部的厚度方向X封堵设置于安装腔2321的腔底面上的进气口2322,也就是说,进气口2322设置于阀本体2323在壁部的厚度方向X上面向电极组件22的一端,封堵件234能够在弹性件233的作用下沿壁部的厚度方向X移动并封堵进气口2322,采用这种结构的单向阀23便于弹性件233向封堵件234施加弹性力,以使封堵件234封堵进气口2322,且能够降低弹性件233的装配难度。
根据本申请的一些实施例,参见图14所示,第一导向柱2324a的直径为D1,弹性件233的内径为D2,满足,0mm<D2-D1≤5mm。
其中,弹性件233为弹簧,弹性件233的内径D2则为弹簧的内侧形成的空腔的直径。
0mm<D2-D1≤5mm,也就是说,当第一导向柱2324a与弹性件233同轴设置时,第一导向柱2324a与弹性件233之间的间隙的尺寸大于0mm,且小于等于5mm。
示例性的,弹性件233的内径与第一导向柱2324a的直径的差值可以是0mm、0.1mm、0.2mm、0.5mm、0.8mm、1mm、1.2mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm或5mm等。
通过将弹性件233的内径与第一导向柱2324a的直径的差值设置为大于0mm且小于等于5mm,一方面能够缓解因弹性件233的内径与第一导向柱2324a的直径的差值小于等于0而造成弹性件233不便于装配在第一导向柱2324a上的现象,以减少弹性件233套设在第一导向柱2324a上的过程中存在刮蹭的现象,另一方面能够缓解因弹性件233的内径与第一导向柱2324a的直径的差值过大而导致弹性件233与第一导向柱2324a之间的间隙过大的现象,以减少弹性件233出现径向窜动或径向变形的情况,从而能够提高弹性件233作用在封堵件234上的弹性力的均衡性,以降低封堵件234出现误开启进气口2322的风险。
在一些实施例中,阀盖2324面向封堵件234的一侧还可以设置有第一限位槽,弹性件233远离封堵件234的一端插设于第一限位槽内。
其中,阀盖2324面向封堵件234的一侧设置有第一限位槽,即阀盖2324在壁部的厚度方向X上面向封堵件234的表面上设置有第一限位槽,在阀盖2324面向封堵件234的一侧凸设有第一导向柱2324a的实施例中,则为阀盖2324凸设第一导向柱2324a的表面设置有第一限位槽。
弹性件233远离封堵件234的一端插设于第一限位槽内,即弹性件233远离封堵件234的一端抵接于第一限位槽的槽底面上。
示例性的,弹性件233为弹簧,对应的,第一限位槽为环形槽结构,在阀盖2324面向封堵件234的一侧凸设有第一导向柱2324a的实施例中,第一限位槽环绕设置于第一导向柱2324a的外侧。
阀盖2324面向封堵件234的一侧还设置有供弹性件233插入的第一限位槽,从而能够对弹性件233抵靠 在阀盖2324上的一端起到限位作用,以减少弹性件233与阀盖2324之间出现相对径向滑移的现象,进而能够提高弹性件233作用在封堵件234上的弹性力的均衡性,有利于提升弹性件233的使用可靠性。
在一些实施例中,弹性件233远离封堵件234的一端与阀盖2324固定连接。
其中,弹性件233与阀盖2324固定连接的结构可以是多种,比如,焊接或粘接等。
需要说明的是,在阀盖2324面向封堵件234的一侧设置有第一限位槽,且弹性件233远离封堵件234的一端插设于第一限位槽内的实施例中,则弹性件233远离封堵件234的一端与第一限位槽的槽底面固定连接;在阀盖2324面向封堵件234的一侧未设置第一限位槽的实施例中,则弹性件233远离封堵件234的一端与阀盖2324相互抵接的表面固定连接。
通过将弹性件233远离封堵件234的一端与阀盖2324固定连接,以使弹性件233抵靠在阀盖2324上的一端与阀盖2324为相互固定连接的结构,从而能够提升弹性件233抵靠在阀盖2324上的稳定性,以进一步减少弹性件233与阀盖2324之间出现相对滑移的现象,进而能够进一步提高弹性件233作用在封堵件234上的弹性力的均衡性。
需要说明的是,单向阀23的结构并不局限于此,在一些实施例中,单向阀23还可以是其他结构,比如,参照图15,图15为本申请又一些实施例提供的电池单体20的局部剖视图。沿壁部的厚度方向X,安装腔2321贯穿阀体232背离电极组件22的一端并形成出气口231,遮挡件24面向出气口231设置。
其中,安装腔2321贯穿阀体232背离电极组件22的一端并形成出气口231,即在阀体232包括阀本体2323和阀盖2324的实施例中,阀体232未设置阀盖2324,以在阀本体2323的内部形成安装腔2321,且安装腔2321沿壁部的厚度方向X贯穿阀本体2323背离电极组件22的一端,以形成出气口231。
通过将安装腔2321设置为在壁部的厚度方向X上贯穿阀体232背离电极组件22的一端,以在阀体232背离电极组件22的一端形成出气口231,且通过遮挡件24对出气口231进行遮盖,采用这种结构的单向阀23便于将弹性件233和封堵件234通过进气口2322装配至安装腔2321内,有利于降低单向阀23的装配难度。
需要说明的是,在阀体232未设置阀盖2324的实施例中,进气口2322可以是设置于安装腔2321的腔侧面上,即封堵件234与弹性件233沿安装腔2321的径向排布,以使封堵件234能够封堵进气口2322,当然,进气口2322也可以是设置于安装腔2321的腔底面上,即封堵件234与弹性件233沿壁部的厚度方向X排布,以使封堵件234能够封堵进气口2322。参见图15所示,沿壁部的厚度方向X,遮挡件24与封堵件234间隔设置,弹性件233的两端分别抵靠于遮挡件24和封堵件234,进气口2322设置于安装腔2321的腔底面。
其中,遮挡件24与安装腔2321的腔底面面向设置,弹性件233在壁部的厚度方向X上的两端分别抵接于遮挡件24和封堵件234,使得弹性件233被压缩在遮挡件24和封堵件234之间,以使弹性件233能够为封堵件234提供弹性力,从而使得封堵件234能够在弹性件233的弹性力的作用下对设置于安装腔2321的腔底面上的进气口2322进行封堵。
需要说明的是,在遮挡件24的第二表面245设置有第二槽2452的实施例中,弹性件233远离封堵件234的一端抵接于第二槽2452的槽底面上。
通过将遮挡件24与封堵件234沿壁部的厚度方向X间隔设置,使得弹性件233的两端能够分别抵靠于遮挡件24和封堵件234,以实现封堵件234能够在弹性件233的作用下沿壁部的厚度方向X封堵设置于安装腔2321的腔底面上的进气口2322,也就是说,进气口2322设置于阀本体2323在壁部的厚度方向X上面向电极组件22的一端,封堵件234能够在弹性件233的作用下沿壁部的厚度方向X移动并封堵进气口2322,采用这种结构的单向阀23便于弹性件233向封堵件234施加弹性力,以使封堵件234封堵进气口2322,且能够降低弹性件233的装配难度。
在一些实施例中,参照图5、图13和图14,并请进一步参照图16,图16为本申请一些实施例提供的电池单体20的外壳21的壁部211的局部剖视图。壁部211具有背离电极组件22的第一表面2112,第一表面2112上设置有安装槽2113,遮挡件24装配至安装槽2113内,安装槽2113的槽底面设置有安装孔2111,安装孔2111连通外壳21的内部,阀本体2323安装于安装孔2111内,且沿壁部的厚度方向X凸出于壁部211面向电极组件22的表面。其中,安装孔2111包括第一孔段2111a和第二孔段2111b,第一孔段2111a和第二孔段2111b沿壁部的厚度方向X排布,且第一孔段2111a位于第二孔段2111b背离电极组件22的一侧,第一孔段2111a的孔径大于第二孔段2111b的孔径。阀本体2323具有位于第一孔段2111a内的连接部2323b,连接部2323b为沿阀本体2323的周向延伸的环形结构,连接部2323b与第一孔段2111a的孔壁面焊接连通,以形成环形结构的焊印。
可选地,参见图14所示,连接部2323b上还设置有应力释放槽2323c,应力释放槽2323c为环形槽结构。在阀体232包括阀本体2323和阀盖2324的实施例中,应力释放槽2323c环绕于阀盖2324的外侧,在阀体232仅设置有阀本体2323的实施例中,应力释放槽2323c环绕于安装腔2321的外侧。通过在连接部2323b上设置应力释放槽2323c,以通过应力释放槽2323c能够释放连接部2323b与第一孔段2111a的孔壁面相互焊接产生的焊接应力,从而能够减少焊接应力对连接第一孔段2111a的孔壁面和连接部2323b的焊缝的影响,减小焊缝开裂的风险,进而降低焊缝处密封失效的风险。
根据本申请的一些实施例,参见图13、图14和图15所示,封堵件234面向阀盖2324或遮挡件24的一侧凸设有第二导向柱2341,弹性件233的部分套设于第二导向柱2341的外侧。
其中,弹性件233为弹簧,弹簧的部分套设于第二导向柱2341的外侧,且弹簧远离阀盖2324或遮挡件24的一端抵接于封堵件234凸设有第二导向柱2341的表面上,即第二导向柱2341插设于弹簧内。
示例性的,第二导向柱2341的中心轴线与安装孔2111的中心轴线重合,且弹性件233的中心轴线与第二导向柱2341的中心轴线重合。
通过在封堵件234面向阀盖2324的一侧凸设第二导向柱2341,且弹性件233的部分套设于第二导向柱 2341的外侧,采用这种结构的单向阀23一方面通过第二导向柱2341能够对弹性件233起到一定的定位作用,以便于对弹性件233进行装配,有利于降低弹性件233的装配难度,另一方面通过第二导向柱2341能够在弹性件233沿壁部的厚度方向X被压缩时起到一定的导向作用,以减少弹性件233在被压缩的过程中出现径向变形的现象,从而能够实现弹性件233沿壁部的厚度方向X稳定地被压缩,有利于提高弹性件233的使用可靠性,进而能够降低封堵件234出现误开启进气口2322的风险。
根据本申请的一些实施例,参见图14所示,第二导向柱2341的直径为D3,弹性件233的内径为D2,满足,0mm<D3-D1≤5mm。
其中,弹性件233为弹簧,弹性件233的内径D2则为弹簧的内侧形成的空腔的直径。
0mm<D3-D1≤5mm,也就是说,当第二导向柱2341与弹性件233同轴设置时,第二导向柱2341与弹性件233之间的间隙的尺寸大于0mm,且小于等于5mm。
示例性的,弹性件233的内径与第而导向柱的直径的差值可以是0mm、0.1mm、0.2mm、0.5mm、0.8mm、1mm、1.2mm、1.5mm、2mm、2.5mm、3mm、3.5mm、4mm、4.5mm或5mm等。
通过将弹性件233的内径与第二导向柱2341的直径的差值设置为大于0mm且小于等于5mm,一方面能够缓解因弹性件233的内径与第二导向柱2341的直径的差值小于等于0而造成弹性件233不便于装配在第二导向柱2341上的现象,以减少弹性件233套设在第二导向柱2341上的过程中存在刮蹭的现象,另一方面能够缓解因弹性件233的内径与第二导向柱2341的直径的差值过大而导致弹性件233与第二导向柱2341之间的间隙过大的现象,以减少弹性件233出现径向窜动或径向变形的情况,从而能够提高弹性件233作用在封堵件234上的弹性力的均衡性,以降低封堵件234出现误开启进气口2322的风险。
在一些实施例中,封堵件234面向阀盖2324的一侧还可以设置有第二限位槽,弹性件233远离阀盖2324的一端插设于第二限位槽内。
其中,封堵件234面向阀盖2324的一侧设置有第二限位槽,即封堵件234在壁部的厚度方向X上面向阀盖2324的表面上设置有第二限位槽,在封堵件234面向阀盖2324的一侧凸设有第二导向柱2341的实施例中,则为封堵件234凸设第二导向柱2341的表面设置有第二限位槽。
弹性件233远离阀盖2324的一端插设于第二限位槽内,即弹性件233远离阀盖2324的一端抵接于第二限位槽的槽底面上。
示例性的,弹性件233为弹簧,对应的,第二限位槽为环形槽结构,在封堵件234面向阀盖2324的一侧凸设有第二导向柱2341的实施例中,第二限位槽环绕设置于第二导向柱2341的外侧。
通过在封堵件234面向阀盖2324的一侧设置供弹性件233插入的第二限位槽,从而能够对弹性件233抵靠在封堵件234上的一端起到限位作用,以减少弹性件233与封堵件234之间出现相对径向滑移的现象,进而能够提高弹性件233作用在封堵件234上的弹性力的均衡性,有利于提升弹性件233的使用可靠性。
根据本申请的一些实施例,弹性件233远离阀盖2324的一端与封堵件234固定连接。
其中,弹性件233与封堵件234固定连接的结构可以是多种,比如,焊接或粘接等。
需要说明的是,在封堵件234面向阀盖2324的一侧设置有第二限位槽,且弹性件233远离阀盖2324的一端插设于第二限位槽内的实施例中,则弹性件233远离阀盖2324的一端与第二限位槽的槽底面固定连接;在封堵件234面向阀盖2324的一侧未设置第二限位槽的实施例中,则弹性件233远离阀盖2324的一端与封堵件234相互抵接的表面固定连接。
通过将弹性件233远离阀盖2324的一端与封堵件234固定连接,以使弹性件233抵靠在封堵件234上的一端与封堵件234为相互固定连接的结构,从而能够提升弹性件233抵靠在封堵件234上的稳定性,以进一步减少弹性件233与封堵件234之间出现相对滑移的现象,进而能够进一步提高弹性件233作用在封堵件234上的弹性力的均衡性。
根据本申请的一些实施例,参见图13、图14和图15所示,封堵件234可以包括压紧部2342和密封部2343,沿壁部的厚度方向X,弹性件233的两端分别抵靠于压紧部2342和阀盖2324或遮挡件24,密封部2343连接于压紧部2342背离阀盖2324或遮挡件24的一侧,密封部2343用于封堵进气口2322。
其中,弹性件233能够为压紧部2342提供弹性作用力,以使压紧部2342能够压紧于密封部2343上,从而通过密封部2343对进气口2322进行封堵。
可选地,压紧部2342的刚度大于密封部2343的刚度,即压紧部2342的抗变形能力大于密封部2343的抗变形能力,使得压紧部2342能够更好地将密封部2343压紧于安装腔2321的腔底面上,以对进气口2322进行封堵。示例性的,压紧部2342的材质可以是多种,比如,钢、铁或铝等。同样的,密封部2343的材质也可以是多种,比如,橡胶、硅胶或塑胶等。
可选地,压紧部2342与密封部2343的连接结构可以是多种,比如,卡接、螺栓螺接或粘接等。
需要说明的是,在封堵件234设置有第二导向柱2341的实施例中,第二导向柱2341凸设于压紧部2342面向阀盖2324或遮挡件24的一侧的表面上。同样的,在封堵件234面向阀盖2324的一侧设置有第二限位槽的实施例中,第二限位槽设置于压紧部2342面向阀盖2324的表面上。
通过将封堵件234设置为包括压紧部2342和密封部2343两个部分,压紧部2342设置于密封部2343面向阀盖2324的一侧,密封部2343用于封堵进气口2322,且弹性件233的两端分别抵靠于阀盖2324和压紧部2342,使得弹性件233能够通过压紧部2342将弹性力作用在密封部2343上,从而有利于提高弹性件233作用在在密封部2343上的弹性力的均衡性,进而能够有效提升密封部2343对进气口2322的封堵效果。
根据本申请的一些实施例,请继续参见图13、图14和图15所示,沿壁部的厚度方向X,压紧部2342具有面向密封部2343的一侧设置有卡接槽2342a,密封部2343面向压紧部2342的一侧凸设有卡接部2343a,卡接部 2343a插设于卡接槽2342a内,卡接部2343a与卡接槽2342a卡接配合。采用这种结构的封堵件234能够提高密封部2343设置于压紧部2342上的结构稳定性,以减少密封部2343相对压紧部2342出现径向滑移的现象,进而有利于提高密封部2343对进气口2322的封堵效果,以减少进气口2322被误开启的现象。
示例性的,卡接部2343a为圆形柱状结构,对应的,卡接槽2342a为圆形槽。
在一些实施例中,密封部2343粘接于压紧部2342。采用粘接的结构连接密封部2343和压紧部2342,一方面能够提高密封部2343连接于压紧部2342上的结构稳定性,有利于减少密封部2343与压紧部2342相互脱离的风险,以提升密封部2343封堵进气口2322的可靠性,另一方面便于实现密封部2343与压紧部2342之间的装配连接,有利于降低密封部2343与压紧部2342之间的装配难度。
在一些实施例中,密封部2343的材质包括三元乙丙、氟橡胶或铁氟龙。采用三元乙丙、氟橡胶或铁氟龙制成的密封部2343使得密封部2343具有较好的耐腐蚀性,能够有效缓解密封部2343被电解液腐蚀的现象,从而有利于提升密封部2343的使用寿命,且能够减少因密封部2343被腐蚀后造成密封部2343封堵进气口2322的效果不佳的现象。
需要说明的是,在一些实施例中,封堵件234也可以不设置压紧部2342,封堵件234仅包括密封部2343,弹性件233的一端直接抵接于密封部2343上。
根据本申请的一些实施例,参见图14所示,沿壁部的厚度方向X,阀盖2324与封堵件234之间的间隙的尺寸为L,满足,0mm<L≤2mm。
其中,阀盖2324与封堵件234之间的间隙的尺寸为L,即阀盖2324与封堵件234在壁部的厚度方向X上的间距为L。
示例性的,阀盖2324与封堵件234之间的间隙的尺寸L可以是0mm、0.1mm、0.2mm、0.3mm、0.4mm、0.5mm、0.6mm、0.7mm、0.8mm、0.9mm、1mm、1.2mm、1.5mm、1.8mm或2mm等。
需要说明的是,在阀盖2324凸设有第一导向柱2324a且封堵件234凸设有第二导向柱2341的实施例中,则L为第一导向柱2324a与第二导向柱2341之间形成的间隙在壁部的厚度方向X上的尺寸;在阀盖2324凸设有第一导向柱2324a,封堵件234未凸设有第二导向柱2341的实施例中,则L为第一导向柱2324a与封堵件234面向阀盖2324的表面之间形成的间隙在壁部的厚度方向X上的尺寸;在阀盖2324未凸设有第一导向柱2324a,封堵件234凸设有第二导向柱2341的实施例中,则L为第二导向柱2341与阀盖2324面向封堵件234的表面之间形成的间隙在壁部的厚度方向X上的尺寸。
通过将阀盖2324与封堵件234在壁部的厚度方向X上的间隙的尺寸设置为大于0mm且小于等于2mm,一方面能够减少阀盖2324对封堵件234的阻挡,以使阀盖2324与封堵件234之间具有供封堵件234沿壁部的厚度方向X移动的空间,从而在外壳21内部的气体推动封堵件234时能够实现封堵件234打开进气口2322进行排气,另一方面能够缓解因阀盖2324与封堵件234之间的间隙过大而造成单向阀23在壁部的厚度方向X上占用的空间过多的现象,从而有利于提升电池单体20的空间利用率。
在一些实施例中,参照图4和图5,并请进一步参照图17,图17为本申请一些实施例提供的绝缘件28的局部剖视图。电池单体20还可以包括绝缘件28,绝缘件28设置于壁部211面向电极组件22的一侧。沿壁部的厚度方向X,单向阀23的阀体232凸出于壁部211面向电极组件22的表面,绝缘件28包括本体部281和容纳部282,本体部281设置于壁部211面向电极组件22的一侧,容纳部282连接于本体部281,单向阀23的阀体232凸出于壁部211面向电极组件22的表面的部分容纳于容纳部282内。
其中,绝缘件28设置于壁部211面向电极组件22的一侧,绝缘件28起到分隔壁部211与电极组件22的作用,以绝缘隔离壁部211和电极组件22。
示例性的,绝缘件28的材质可以是多种,比如,橡胶、硅胶或塑胶等。
单向阀23的阀体232凸出于壁部211面向电极组件22的表面的部分容纳于容纳部282内,即绝缘件28对应单向阀23的位置形成有容纳部282,且容纳部282包覆于单向阀23的阀体232凸出于壁部211面向电极组件22的表面的部分的外侧。
可选地,绝缘件28的本体部281和容纳部282可以是一体式结构,也可以是分体式结构,当本体部281和容纳部282为一体式结构,本体部281和容纳部282可以通过注塑或铣削等工艺一体成型,当本体部281和容纳部282为分体式结构,容纳部282可以通过粘接或卡接等方式连接于本体部281。示例性的,在图17中,本体部281和容纳部282为一体式结构。
在一些实施例中,参见图5和图17所示,容纳部282设置有第二通孔2821,第二通孔2821与设置于阀体232上的进气口2322连通。
其中,容纳部282上设置第二通孔2821,且第二通孔2821贯穿容纳部282,使得第二通孔2821能够连通容纳部282的内部和外壳21的内部,以使阀体232的进气口2322能够通过第二通孔2821连通外壳21的内部。
通过在容纳部282上设置第二通孔2821,使得第二通孔2821能够连通外壳21的内部和容纳部282的内部,使得单向阀23的阀体232的进气口2322能够通过第二通孔2821与外壳21的内部连通,以实现外壳21内部的气体能够通过第二通孔2821进入容纳部282内后再通过单向阀23排出外壳21的外部,从而无需气体通过本体部281与壁部211之间的间隙进入至容纳部282内后再通过单向阀23排出,有利于提高单向阀23排出外壳21内部的气体的顺畅度。
在一些实施例中,参见图5和图17所示,沿壁部的厚度方向X,进气口2322设置于阀体232面向电极组件22的一端。容纳部282包括第一壁2822和第二壁2823,第一壁2822围设于阀体232的周围,沿壁部的厚度方向X,第一壁2822的一端连接本体部281,第二壁2823连接于第一壁2822远离本体部281的一端,第二通孔2821设置于第二壁2823。
其中,第一壁2822围设于阀体232的周围,即容纳部282的第一壁2822为环绕阀体232设置的环形结构。
第一壁2822的一端连接本体部281,第二壁2823连接于第一壁2822远离本体部281的一端,也就是说,第二壁2823通过第一壁2822与本体部281相连,且第二壁2823和第一壁2822共同围合形成用于容纳阀体232的部分的容纳部282,第二壁2823为容纳部282与进气口2322面向设置的一个壁。
第二通孔2821设置于第二壁2823,即第二通孔2821设置于容纳部282面向电极组件22的一端上。当然,在其他实施例中,第二通孔2821也可以设置于第一壁2822上,即第二通孔2821设置于容纳部282在容纳部282的径向上的一侧上。
容纳部282设置有相互连接第一壁2822和第二壁2823,第一壁2822围设于阀体232的周围,且第二壁2823位于阀体232在壁部的厚度方向X上面向电极组件22的一端,以使第一壁2822和第二壁2823围合形成用于容纳阀体232延伸至外壳21内部的部分的容纳部282,通过将容纳部282的第二通孔2821设置在第一壁2822上有利于增加气体从第二通孔2821进入阀体232的进气口2322的路径,以缓解电解液跟随气体溢出的现象,通过将容纳部282的第二通孔2821设置在第二壁2823上有利于实现进气口2322与第二通孔2821对应设置,以提升单向阀23排出外壳21内部的气体的顺畅度。
根据本申请的一些实施例,遮挡件24的材质与壁部211的材质相同。
示例性的,遮挡件24的材质与壁部211的材质可以均为铜、铁、铝、钢或铝合金等。
通过将遮挡件24与壁部211设置为相同材质的结构,一方面便于将同材质的遮挡件24和壁部211相互进行装配,比如,焊接,有利于降低遮挡件24设置在壁部211上的装配难度,另一方面能够使得遮挡件24与壁部211的外观相同,有利于提高电池单体20的外观的美观度。
根据本申请的一些实施例,参见图3和图4所示,外壳21可以包括壳体212和端盖213。壳体212的内部形成具有开口2121的容纳腔,容纳腔用于容纳电极组件22,端盖213封闭开口2121,端盖213为壁部211。
其中,端盖213为壁部211,也就是说,单向阀23设置于端盖213上。
需要说明的是,电池单体20的结构并不局限于此,在一些实施例中,电池单体20还可以是其他结构,比如,壳体212包括壁部211,也就是说,单向阀23安装于壳体212的一个壁上,单向阀23可以安装于壳体212与端盖213相对设置的底壁上,也可以安装于壳体212与端盖213相邻且相互连接的侧壁上。
通过将外壳21的壁部211设置为外壳21用于封闭壳体212的开口2121的端盖213,采用这种结构的电池单体20便于在端盖213上安装单向阀23,有利于降低在电池单体20的装配难度,以提升电池单体20的生产效率。同样的,通过将外壳21的壁部211设置为壳体212的一个壁,采用这种结构的电池单体20能够减少端盖213与壳体212相互连接时产生的应力对单向阀23造成的影响,以缓解单向阀23出现损坏等现象,进而能够提升电池单体20的使用稳定性和使用寿命。
根据本申请的一些实施例,参见图3和图4所示,电池单体20还包括泄压机构27,泄压机构27设置于外壳21,泄压机构27被配置为在电池单体20热失控时致动并泄放电池单体20的内部压力,泄压机构27的致动压力大于单向阀23的开启压力。
其中,泄压机构27设置于外壳21上,可以是设置于端盖213上,也可以是设置于壳体212上,示例性的,在图4中,泄压机构27设置于端盖213上。
泄压机构27被配置为在电池单体20热失控时致动并泄放电池单体20的内部压力,即在电池单体20的内部发生热失控时,泄压机构27能够致动并开启,以泄放电池单体20的内部因热失控产生的气体等。
泄压机构27的致动压力大于单向阀23的开启压力,即外壳21内部的气体开启泄压机构27的压力大于外壳21内部的气体开启单向阀23的压力。需要说明的是,在电池单体20发生热失控时,电池单体20的外壳21内部的气体会迅速突增,以实现打开泄压机构27进行泄压,而电池单体20在正常使用过程中外壳21内部产生的气体达到阈值时能够打开单向阀23,但无法打开泄压机构27。
可选地,泄压机构27可以与外壳21可以是一体成型的结构,也可以是分体设置的结构。若泄压机构27可以与外壳21为一体成型的结构,则泄压机构27为外壳21上设置有薄弱结构的区域,比如,外壳21上设置刻痕槽的区域;若泄压机构27可以与外壳21为分体设置的结构,则泄压机构27可以是通过焊接、热熔、注塑或粘接等方式连接于外壳21上。示例性的,在图4中,泄压机构27与外壳21为分体设置的结构,且泄压机构27设置于外壳21的端盖213上,泄压机构27可以是诸如防爆阀、防爆片、泄压阀或安全阀等泄压部件。
示例性的,在图4中,电极端子26和泄压机构27均设置于端盖213上,当然,在其他实施例中,电极端子26和泄压机构27也可以是设置于外壳21不同的壁上,例如,泄压机构27设置于壳体212上,电极端子26设置于端盖213上。
通过将单向阀23开启排气的开启压力设置为小于泄压机构27泄压的致动压力,使得在电池单体20正常使用过程中外壳21的内部产生气体时能够通过单向阀23排出外壳21的外部,以缓解因电池单体20的内部气压上升而导致泄压机构27在电池单体20热失控之前出现提前致动泄压的现象,进而能够有效提升电池单体20的使用稳定性,以提升电池单体20的使用寿命和使用可靠性。
在一些实施例中,单向阀23和泄压机构27可以是设置在外壳21的同一个壁上。例如,单向阀23和泄压机构27均设置在端盖213上。
在一些实施例中,单向阀23和泄压机构27可以是设置在外壳21不同的壁上。例如,单向阀23设置在端盖213上,泄压机构27设置在壳体212上。
在一些实施例中,单向阀23的排气速率小于泄压机构27的排气速率。
通过将单向阀23的排气速率设置为小于泄压机构27的排气速率,使得在电池单体20发生热失控时能够 缓解单向阀23排气过快而造成泄压机构27无法致动开启的现象,以使泄压机构27能够在电池单体20热失控时致动并稳定地泄放电池单体20的内部压力,从而有利于降低电池单体20在热失控时出现起火爆炸等风险。
在一些实施例中,电池单体20为碱金属电池,比如可以为钠金属电池,锂金属电池等。碱金属电池配合单向阀23使用,可以及时排出碱金属电池在正常工作时产生的气体,提高碱金属电池的使用寿命。
根据本申请的一些实施例,本申请还提供了一种电池100,电池100包括以上任一方案的电池单体20。
其中,参见图2所示,电池100还可以包括箱体10,电池单体20容纳于箱体10内。在一些实施例中,箱体10可以包括第一箱本体11和第二箱本体12,第一箱本体11与第二箱本体12相互盖合,第一箱本体11和第二箱本体12共同限定出用于容纳电池单体20的装配空间。
可选地,在图2中,第二箱本体12可以为一端开放的空心结构,第一箱本体11可以为板状结构,第一箱本体11盖合于第二箱本体12的开放侧,以使第一箱本体11与第二箱本体12共同限定出装配空间。当然,箱体10的结构并不局限于此,在其他实施例中,第一箱本体11和第二箱本体12也可以是均为一侧开放的空心结构,第一箱本体11的开放侧盖合于第二箱本体12的开放侧。
当然,第一箱本体11和第二箱本体12形成的箱体10可以是多种形状,比如,圆柱体或长方体等。示例性的,在图2中,箱体10为长方体结构。
在一些实施例中,设置于箱体10内的电池单体20可以是一个,也可以是多个。示例性的,在图2中,电池100的箱体10内设置有多个电池单体20,多个电池单体20之间可以是串联或并联或混联,混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起,再将多个电池单体20构成的整体容纳于箱体10内;当然,电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式,多个电池模块再串联或并联或混联形成一个整体,并容纳于箱体10内。
其中,电池100还可以包括其他结构,例如,该电池100还可以包括汇流部件,汇流部件连接多个电池单体20,以实现多个电池单体20之间的电连接。
需要说明的是,在一些实施例中,电池100也可以不设置箱体10,电池100包括多个电池单体20,而由多个电池单体20组成的电池100可以直接装配至用电装置上,以通过多个电池单体20为用电装置提供电能。也就是说,箱体10可以作为用电装置的一部分。用电装置以车辆1000为例,箱体10可以作为车辆1000的底盘结构的一部分,例如,箱体10的部分可以成为车辆1000的地板的至少一部分,或者,箱体10的部分可以成为车辆1000的横梁和纵梁的至少一部分。
根据本申请的一些实施例,本申请还提供了一种用电装置,用电装置包括以上任一方案的电池单体20,并且电池单体20用于为用电装置提供电能。
其中,用电装置可以是前述任一应用电池单体20的设备或系统。
根据本申请的一些实施例,参见图3至图9以及至图12至图14所示,本申请提供了一种电池单体20,电池单体20包括外壳21、电极组件22、单向阀23、遮挡件24。外壳21具有壁部211,外壳21包括壳体212和端盖213,壳体212的内部形成具有开口2121的容纳腔,电极组件22容纳于容纳腔内,端盖213封闭开口2121,端盖213为壁部211。沿壁部的厚度方向X,壁部211具有背离电极组件22的第一表面2112,第一表面2112设置有安装槽2113,安装槽2113的槽底面设置有安装孔2111,单向阀23安装于安装孔2111内,且凸出于壁部211面向电极组件22的一侧的表面,单向阀23用于排出外壳21内部的气体。单向阀23包括阀体232、弹性件233和封堵件234。阀体232设置于壁部211,阀体232的内部形成有安装腔2321,阀体232上设置有进气口2322和出气口231,进气口2322用于连通安装腔2321和外壳21的内部,出气口231用于连通安装腔2321和排气通道25。弹性件233设置于安装腔2321内,封堵件234可移动地设置于安装腔2321内,封堵件234用于在弹性件233的作用下封堵进气口2322,且用于在外壳21内部的气体的作用下打开进气口2322。阀体232包括阀本体2323和阀盖2324,阀本体2323安装于安装孔2111内,且阀本体2323面向电极组件22的一端设置有进气口2322,沿壁部的厚度方向X,阀盖2324连接于阀本体2323背离电极组件22的一端,阀盖2324与阀本体2323共同围合形成安装腔2321,阀盖2324设置有出气口231,阀盖2324与封堵件234间隔设置,弹性件233的两端分别抵靠于阀盖2324和封堵件234,进气口2322设置于安装腔2321的腔底面。遮挡件24安装于安装槽2113内,遮挡件24的材质与壁部211的材质相同。沿壁部的厚度方向X,遮挡件24位于单向阀23背离电极组件22的一侧,且遮挡件24覆盖单向阀23,遮挡件24与壁部211之间形成有排气通道25,排气通道25连通出气口231和外壳21的外部。排气通道25包括第一排气间隙251和第二排气间隙252,第一排气间隙251形成于遮挡件24与安装槽2113的槽侧面之间。遮挡件24和安装槽2113在垂直于壁部的厚度方向X上的横截面为矩形,遮挡件24的外周面包括四个第一拐角面241和四个第一侧面242,每相邻的两个第一侧面242通过一个第一拐角面241相连,安装槽2113的槽底面包括四个第二拐角面2113a和四个第二侧面2113b,每相邻的两个第二侧面2113b通过一个第二拐角面2113a相连,每个第一侧面242与对应的第二侧面2113b相互抵接并焊接连接,每个第一拐角面241与对应的第二拐角面2113a之间形成一个第一排气间隙251。第一拐角面241和第二拐角面2113a均为圆弧面,第一拐角面241的半径大于第二拐角面2113a的半径。沿壁部的厚度方向X,遮挡件24具有面向单向阀23的第二表面245和背离单向阀23的第三表面246,第二表面245搭接于安装槽2113的槽底面,第三表面246与第一表面2112平齐。第二表面245设置有四个第一槽2451,第一槽2451沿遮挡件24的径向延伸并贯穿一个第一拐角面241,第一槽2451的槽底面与安装槽2113的槽底面之间形成第二排气间隙252。第二表面245还设置有第二槽2452,多个第一槽2451设置于第二槽2452的周围并均与第二槽2452连通,第二槽2452与出气口231连通。沿壁部的厚度方向X,出气口231面向第二槽2452设置,且出气口231的投影位于第二槽2452内。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有 各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (29)

  1. 一种电池单体,包括:
    外壳,具有壁部;
    电极组件,容纳于所述外壳内;
    单向阀,设置于所述壁部,所述单向阀具有出气口,所述出气口用于排出所述外壳内部的气体;以及
    遮挡件,安装于所述壁部,沿所述壁部的厚度方向,所述遮挡件位于所述单向阀背离所述电极组件的一侧,且所述遮挡件覆盖所述单向阀,所述遮挡件与所述壁部之间形成有排气通道,所述排气通道连通所述出气口和所述外壳的外部。
  2. 根据权利要求1所述的电池单体,其中,沿所述壁部的厚度方向,所述壁部具有背离所述电极组件的第一表面,所述第一表面设置有安装槽,所述安装槽的槽底面设置有安装孔,所述单向阀的至少部分设置于所述安装孔内,所述遮挡件的至少部分容纳于所述安装槽内。
  3. 根据权利要求2所述的电池单体,其中,所述排气通道包括第一排气间隙,所述第一排气间隙形成于所述遮挡件与所述安装槽的槽侧面之间,所述第一排气间隙用于连通所述出气口和所述外壳的外部。
  4. 根据权利要求3所述的电池单体,其中,所述遮挡件的外周面包括第一拐角面和至少两个第一侧面,所述第一拐角面连接相邻的两个所述第一侧面;
    所述安装槽的槽侧面包括第二拐角面和至少两个第二侧面,所述第二拐角面连接相邻的两个所述第二侧面,每个所述第二侧面与一个所述第一侧面相连,所述第二拐角面与所述第一拐角面之间形成所述第一排气间隙。
  5. 根据权利要求4所述的电池单体,其中,所述第一拐角面和所述第二拐角面均为圆弧面,所述第一拐角面的半径大于所述第二拐角面的半径。
  6. 根据权利要求4或5所述的电池单体,其中,所述第一侧面与所述第二侧面焊接连接。
  7. 根据权利要求4-6任一项所述的电池单体,其中,所述遮挡件在垂直于所述壁部的厚度方向上的横截面为矩形,所述遮挡件的外周面包括四个所述第一侧面和四个所述第一拐角面,至少一个所述第一拐角面处形成有所述第一排气间隙。
  8. 根据权利要求3所述的电池单体,其中,所述遮挡件的外周面设置有凹槽,所述凹槽的槽底面与所述安装槽的槽侧面之间形成所述第一排气间隙。
  9. 根据权利要求8所述的电池单体,其中,所述遮挡件的外周面未设置所述凹槽的区域与所述安装槽的槽侧面焊接连通。
  10. 根据权利要求3所述的电池单体,其中,所述遮挡件的外周面凸设有多个凸部,多个所述凸部沿所述遮挡件的周向间隔排布,所述凸部抵接于所述安装槽的槽侧面,所述遮挡件的外周面未设置所述凸部的区域与所述安装槽的槽侧面之间形成所述第一排气间隙。
  11. 根据权利要求10所述的电池单体,其中,所述凸部与所述安装槽的槽侧面过盈配合。
  12. 根据权利要求3-11任一项所述的电池单体,其中,所述排气通道还包括第二排气间隙,所述第二排气间隙形成于所述遮挡件与所述安装槽的槽底面之间,所述第二排气间隙连通所述第一排气间隙和所述出气口。
  13. 根据权利要求12所述的电池单体,其中,沿所述壁部的厚度方向,所述遮挡件具有面向所述单向阀的第二表面,所述第二表面搭接于所述安装槽的槽底面,所述第二表面设置有第一槽,所述第一槽的槽底面与所述安装槽的槽底面之间形成所述第二排气间隙。
  14. 根据权利要求13所述的电池单体,其中,所述遮挡件与所述安装槽的槽侧面之间形成有多个所述第一排气间隙,多个所述第一排气间隙沿所述遮挡件的周向间隔排布,所述第二表面上设置有多个所述第一槽,每个所述第一排气间隙与一个所述第一槽连通。
  15. 根据权利要求14所述的电池单体,其中,所述第二表面还设置有第二槽,多个所述第一槽设置于所述第二槽的周围并均与所述第二槽连通,所述第二槽与所述出气口连通。
  16. 根据权利要求15所述的电池单体,其中,沿所述壁部的厚度方向,所述出气口设置于所述单向阀背离所述电极组件的一端,所述出气口面向所述第二槽设置,且所述出气口的投影位于所述第二槽内。
  17. 根据权利要求2-16任一项所述的电池单体,其中,沿所述壁部的厚度方向,所述遮挡件不超出所述第一表面。
  18. 根据权利要求17所述的电池单体,其中,所述遮挡件具有背离所述单向阀的第三表面,所述第三表面与所述第一表面平齐。
  19. 根据权利要求2-18任一项所述的电池单体,其中,沿所述壁部的厚度方向,所述单向阀不超出所述安装槽的槽底面。
  20. 根据权利要求1-19任一项所述的电池单体,其中,所述遮挡件与所述壁部固定连接。
  21. 根据权利要求1-20任一项所述的电池单体,其中,所述单向阀包括:
    阀体,设置于所述壁部,所述阀体的内部形成有安装腔,所述阀体上设置有进气口和所述出气口,所述进气口用于连通所述安装腔和所述外壳的内部,所述出气口用于连通所述安装腔和所述排气通道;
    弹性件,设置于所述安装腔内;
    封堵件,可移动地设置于所述安装腔内,所述封堵件用于在所述弹性件的作用下封堵所述进气口,且用于在所述外壳内部的气体的作用下打开所述进气口。
  22. 根据权利要求21所述的电池单体,其中,所述阀体包括:
    阀本体,设置于所述壁部,所述阀本体设置有所述进气口;
    阀盖,沿所述壁部的厚度方向,所述阀盖设置于所述阀本体背离所述电极组件的一端,所述阀盖与所述阀本体共同围合形成所述安装腔,所述阀盖设置有所述出气口。
  23. 根据权利要求22所述的电池单体,其中,沿所述壁部的厚度方向,所述阀盖与所述封堵件间隔设置,所述弹性件的两端分别抵靠于所述阀盖和所述封堵件,所述进气口设置于所述安装腔的腔底面。
  24. 根据权利要求21所述的电池单体,其中,沿所述壁部的厚度方向,所述安装腔贯穿所述阀体背离所述电极组件的一端并形成所述出气口,所述遮挡件面向所述出气口设置。
  25. 根据权利要求24所述的电池单体,其中,沿所述壁部的厚度方向,所述遮挡件与所述封堵件间隔设置,所述弹性件的两端分别抵靠于所述遮挡件和所述封堵件,所述进气口设置于所述安装腔的腔底面。
  26. 根据权利要求1-25任一项所述的电池单体,其中,所述遮挡件的材质与所述壁部的材质相同。
  27. 根据权利要求1-26任一项所述的电池单体,其中,所述外壳包括:
    壳体,内部形成具有开口的容纳腔,所述容纳腔用于容纳所述电极组件;
    端盖,封闭所述开口;
    其中,所述端盖为所述壁部;或
    所述壳体包括所述壁部。
  28. 一种电池,包括如权利要求1-27任一项所述的电池单体。
  29. 一种用电装置,包括如权利要求1-27任一项所述的电池单体,所述电池单体用于提供电能。
PCT/CN2023/125422 2023-06-16 2023-10-19 电池单体、电池及用电装置 Ceased WO2024255046A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020267000923A KR20260021066A (ko) 2023-06-16 2023-10-19 배터리셀, 배터리 및 전기 장치
EP23941270.3A EP4730531A1 (en) 2023-06-16 2023-10-19 Battery cell, battery and electrical device
JP2025563752A JP2026515925A (ja) 2023-06-16 2023-10-19 電池セル、電池及び電力消費装置
US19/370,811 US20260051643A1 (en) 2023-06-16 2025-10-28 Battery cell, battery, and electric apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310726909.4A CN119153883A (zh) 2023-06-16 2023-06-16 电池单体、电池及用电装置
CN202310726909.4 2023-06-16

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/370,811 Continuation US20260051643A1 (en) 2023-06-16 2025-10-28 Battery cell, battery, and electric apparatus

Publications (1)

Publication Number Publication Date
WO2024255046A1 true WO2024255046A1 (zh) 2024-12-19

Family

ID=93800510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/125422 Ceased WO2024255046A1 (zh) 2023-06-16 2023-10-19 电池单体、电池及用电装置

Country Status (6)

Country Link
US (1) US20260051643A1 (zh)
EP (1) EP4730531A1 (zh)
JP (1) JP2026515925A (zh)
KR (1) KR20260021066A (zh)
CN (1) CN119153883A (zh)
WO (1) WO2024255046A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119742531B (zh) * 2025-03-05 2025-06-27 宁德时代新能源科技股份有限公司 一种电池单体、电池装置和用电装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208173641U (zh) * 2018-05-18 2018-11-30 宁德时代新能源科技股份有限公司 二次电池顶盖组件及二次电池
CN208189650U (zh) * 2018-05-18 2018-12-04 宁德时代新能源科技股份有限公司 二次电池顶盖组件及二次电池
CN208507795U (zh) * 2018-04-24 2019-02-15 浙江虹达特种橡胶制品有限公司 一种锂电池单向排泄安全阀
CN110021727A (zh) * 2018-01-10 2019-07-16 宁德时代新能源科技股份有限公司 单向透气阀、二次电池的顶盖组件及二次电池
CN215342865U (zh) * 2021-07-28 2021-12-28 蜂巢能源科技有限公司 一种防爆结构、顶盖组件及锂电池
CN218070012U (zh) * 2022-08-17 2022-12-16 厦门海辰储能科技股份有限公司 一种电池的端盖组件、电池、电池包及用电设备
CN219040686U (zh) * 2022-12-16 2023-05-16 深圳为方能源科技有限公司 一种电池顶盖及水系钠离子电池

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110021727A (zh) * 2018-01-10 2019-07-16 宁德时代新能源科技股份有限公司 单向透气阀、二次电池的顶盖组件及二次电池
CN208507795U (zh) * 2018-04-24 2019-02-15 浙江虹达特种橡胶制品有限公司 一种锂电池单向排泄安全阀
CN208173641U (zh) * 2018-05-18 2018-11-30 宁德时代新能源科技股份有限公司 二次电池顶盖组件及二次电池
CN208189650U (zh) * 2018-05-18 2018-12-04 宁德时代新能源科技股份有限公司 二次电池顶盖组件及二次电池
CN215342865U (zh) * 2021-07-28 2021-12-28 蜂巢能源科技有限公司 一种防爆结构、顶盖组件及锂电池
CN218070012U (zh) * 2022-08-17 2022-12-16 厦门海辰储能科技股份有限公司 一种电池的端盖组件、电池、电池包及用电设备
CN219040686U (zh) * 2022-12-16 2023-05-16 深圳为方能源科技有限公司 一种电池顶盖及水系钠离子电池

Also Published As

Publication number Publication date
EP4730531A1 (en) 2026-04-22
CN119153883A (zh) 2024-12-17
US20260051643A1 (en) 2026-02-19
KR20260021066A (ko) 2026-02-12
JP2026515925A (ja) 2026-05-19

Similar Documents

Publication Publication Date Title
WO2025043906A1 (zh) 电池单体、电池及用电设备
WO2024255226A1 (zh) 电池单体、电池及用电装置
WO2025055319A1 (zh) 电池单体、电池及用电装置
US20260051644A1 (en) Battery cell, battery, and electric apparatus
US20260051610A1 (en) Battery cell, battery, and electric apparatus
WO2024212677A1 (zh) 电池单体、电池及用电装置
CN118523020A (zh) 电池单体、电池及用电装置
CN221861909U (zh) 电池单体、电池及用电装置
US20260051643A1 (en) Battery cell, battery, and electric apparatus
WO2025000688A1 (zh) 电池单体、电池及用电装置
WO2025208761A1 (zh) 电池单体、电池及用电装置
WO2025118508A1 (zh) 电池单体、电池、用电装置及储能柜
WO2025194720A1 (zh) 电池单体、电池及用电装置
WO2025145303A1 (zh) 电池单体、电池及用电装置
WO2024178553A1 (zh) 电池单体、电池及用电装置
CN222995769U (zh) 电池单体、电池及用电装置
WO2025065496A1 (zh) 电池单体、电池及用电装置
WO2025065498A1 (zh) 电池单体、电池及用电装置
WO2025189467A1 (zh) 电池单体、电池及用电装置
WO2025189465A1 (zh) 电池单体、电池及用电装置
WO2025184898A1 (zh) 电池单体、电池及用电设备
WO2025208760A1 (zh) 电池单体、电池及用电装置
WO2025118581A1 (zh) 电池单体、电池、用电装置及储能柜
WO2026020421A1 (zh) 电池单体、电池及用电装置
WO2025145304A1 (zh) 电池单体、电池及用电装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23941270

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025563752

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025563752

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 1020267000923

Country of ref document: KR

Free format text: ST27 STATUS EVENT CODE: A-0-1-A10-A15-NAP-PA0105 (AS PROVIDED BY THE NATIONAL OFFICE)

WWE Wipo information: entry into national phase

Ref document number: 1020267000923

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2023941270

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2023941270

Country of ref document: EP

Effective date: 20260113

ENP Entry into the national phase

Ref document number: 2023941270

Country of ref document: EP

Effective date: 20260113

WWP Wipo information: published in national office

Ref document number: 1020267000923

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2023941270

Country of ref document: EP