WO2023071524A1 - 顶盖组件、电池单体、电池及用电装置 - Google Patents

顶盖组件、电池单体、电池及用电装置 Download PDF

Info

Publication number
WO2023071524A1
WO2023071524A1 PCT/CN2022/116727 CN2022116727W WO2023071524A1 WO 2023071524 A1 WO2023071524 A1 WO 2023071524A1 CN 2022116727 W CN2022116727 W CN 2022116727W WO 2023071524 A1 WO2023071524 A1 WO 2023071524A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
top cover
pressure relief
channel
pole
Prior art date
Application number
PCT/CN2022/116727
Other languages
English (en)
French (fr)
Inventor
师光达
李英
郭京浩
蔡雅芝
迟庆魁
钟礼斌
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22885415.4A priority Critical patent/EP4270612A1/en
Publication of WO2023071524A1 publication Critical patent/WO2023071524A1/zh
Priority to US18/446,365 priority patent/US20230395929A1/en

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
    • H01M50/30—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • 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
    • 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
    • H01M50/394—Gas-pervious parts or elements
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • 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
    • H01M50/392—Arrangements for facilitating escape of gases with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes
    • 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 embodiments of the present application relate to the technical field of battery production, and in particular to a top cover assembly, a battery cell, a battery, and an electrical device.
  • batteries As an important energy source in daily life, batteries have the characteristics of high capacity and long cycle life. At present, the widely used batteries are mainly lithium-ion batteries. Lithium-ion batteries have significant advantages in terms of operating voltage, energy density, and cycle life. However, during the use of lithium-ion batteries, gas will be generated inside, causing the internal pressure of the battery to rise continuously. If the pressure is not released in time, the battery will explode.
  • a pressure relief device is usually designed on the top cover of the battery cell, which can realize automatic pressure relief after the pressure inside the battery cell reaches a certain value.
  • the current pressure relief device used in the battery cell has the problem of insufficient airtightness, and the electrolyte inside the battery cell can easily flow out of the battery cell from the pressure relief device, resulting in battery leakage.
  • the purpose of the embodiment of the present application is to provide a top cover assembly, a battery, a battery cell and an electrical device, which can ensure the airtightness of the pressure relief device and prevent the electrolyte inside the battery cell from easily flowing out of the pressure relief device The battery will cause the battery to leak.
  • the embodiment of the present application provides a top cover assembly, including a top cover, a connecting piece and a pressure relief valve, the top cover is used to connect with the casing of the battery cell, the top cover is provided with a through hole; the connecting piece is arranged on On the top cover, the connector is provided with a mounting hole communicating with the through hole and a first channel extending from the wall of the mounting hole to the outside world, and an opening where the first channel communicates with the outside world is provided There is a first gas permeable membrane; the pressure relief valve is arranged in the installation hole and can slide in the installation hole under pressure, and the pressure relief valve is provided with a second passage, and the second passage One end communicates with the side of the top cover away from the connecting piece, and the other end of the second passage can be switched between a sealed state and a pressure release state; in the sealed state, the other end of the second passage One end and the opening of the first channel on the wall of the installation hole are staggered; in the pressure relief state, the other end of the second channel is connected
  • the embodiment of the present application also provides a battery cell, including a casing, an electrode assembly and the top cover assembly in the above embodiment, the casing has an inner cavity and an opening communicating with the inner cavity; the electrode assembly is arranged in the inner cavity In the cavity; the top cover of the top cover assembly is connected with the housing and closes the opening.
  • the embodiment of the present application also provides a battery, including the battery cell in the above embodiment.
  • An embodiment of the present application also provides an electrical device, including the battery in the above embodiment.
  • the first passage includes a first discharge section and a second discharge section communicated with each other, the first discharge section communicates with the installation hole, and is perpendicular to the central axis of the installation hole
  • the second discharge section is used to communicate with the outside and extends in a direction parallel to the central axis of the installation hole. In this way, the opening at one end of the first passage can be made to face the central axis of the mounting hole, and the opening at the other end of the second passage can be made to face the side of the connecting member away from the top cover.
  • the connecting piece is provided with a fixing hole communicating with the first discharge section, and a temperature sensing element is arranged in the fixing hole.
  • the second channel includes a first pressure relief section and a second pressure relief section that communicate with each other, and the first pressure relief section also communicates with the side of the top cover away from the connecting piece, and extend in a direction parallel to the central axis of the installation hole, and the second pressure relief section extends in a direction perpendicular to the central axis of the installation hole.
  • the opening at one end of the second channel can be made to face the side of the top cover away from the connecting piece, and the opening at the other end of the second channel is oriented away from the central axis of the mounting hole.
  • the top cover assembly further includes an elastic member, one end of the elastic member is connected to the hole wall of the installation hole away from the top cover, and the other end of the elastic member is connected to the pressure relief valve. connect. In this way, after the pressure relief valve moves under the action of pressure, it can automatically return to its original position, so as to realize the automatic pressure relief of the battery cells.
  • the pressure relief valve includes a main body part and a protruding part connected together
  • the installation hole includes a first hole wall surface, a step surface and a second hole wall surface distributed along the axial direction
  • the main body part and the The wall surface of the first hole is slidably connected
  • the protrusion is slidably connected to the wall surface of the second hole
  • the stepped surface is used to limit the sliding position of the protrusion.
  • the main body part can cooperate with the wall surface of the first hole
  • the protrusion part can cooperate with the wall surface of the second hole
  • the stepped surface can be used to limit the sliding of the protrusion part only on the wall surface of the first hole.
  • the top cover assembly further includes a pole, the top cover is provided with a pole hole, the through hole is disposed adjacent to the pole hole, and the pole passes through the pole hole And riveted with the connecting piece.
  • the top cover assembly further includes a first plastic part, the first plastic part is arranged between the connecting part and the top cover, and the first plastic part is provided with a The first through hole through which the pole passes and the second through hole through which the pressure relief valve passes. In this way, by providing the first plastic part, the airtightness at the contact position between the connecting part and the top cover can be ensured.
  • the top cover assembly further includes a second plastic part, the second plastic part is arranged on the side of the top cover away from the connecting part, and the second plastic part is provided with a The third via hole through which the pole passes and the fourth via hole communicated with the through hole. In this way, by providing the second plastic part, the airtightness of the side of the top cover away from the connecting part can be ensured.
  • a second gas permeable membrane is disposed in the fourth via hole. In this way, it can be ensured that the electrolyte will not flow from the fourth through hole of the second plastic part into the through hole of the top cover.
  • the top cover assembly, the battery cell, the battery and the electrical device provided in the embodiment of the present application can ensure the airtightness of the assembly gap between the pressure relief valve and the connecting piece by providing a pressure relief structure in the form of a channel in the top cover assembly , so that the electrolyte will not easily flow out from the assembly gap between the pressure relief valve and the connecting piece, so as to ensure the airtightness of the pressure relief device.
  • the membrane can prevent the electrolyte inside the battery cell from flowing out along the first channel when the gas is discharged, and prevent the electrolyte inside the battery cell from flowing out of the cell from the pressure relief device to cause battery leakage.
  • Fig. 1 is a schematic diagram of the exploded structure of the top cover assembly provided by the embodiment of the present application;
  • Fig. 2 is a top view structural schematic diagram of the top cover assembly provided by the embodiment of the present application.
  • Fig. 3 is a schematic cross-sectional structure diagram of the top cover assembly along the A-A direction in Fig. 2 when the pressure relief valve is used in a sealed state;
  • Fig. 4 is a schematic diagram of an enlarged structure of part B in Fig. 3;
  • Fig. 5 is a schematic cross-sectional structure diagram of the top cover assembly along the A-A direction in Fig. 2 when the pressure relief valve is used in the pressure relief state;
  • Fig. 6 is a schematic diagram of an enlarged structure of part C in Fig. 5;
  • Fig. 7 is a schematic diagram of a cross-sectional enlarged structure of the connector along the A-A direction in Fig. 2;
  • Fig. 8 is a cross-sectional enlarged schematic view of the pressure relief valve along the direction A-A in Fig. 2 .
  • Pressure relief valve 310. Second channel; 311. First pressure relief section; 312. Second pressure relief section; 320. Main body; 330. Protrusion;
  • the first plastic part 810. The first via hole; 820. The second via hole;
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to two or more groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Lithium-ion batteries have become extremely important in today's energy crisis, which can meet the needs of people's modern green life.
  • the electrolyte inside the battery cells will decompose and generate gas, which will cause the internal pressure of the battery cells to rise, and in severe cases, the batteries will explode. Therefore, a pressure relief device is usually designed at the top cover of the battery cell.
  • a battery cell generally includes a casing, an electrode assembly, an electrode terminal, and a top cover. Covering the opening of the casing to isolate the internal environment of the battery cell from the external environment.
  • the electrode assembly is arranged inside the casing, and is electrically connected to the electrode terminal through the transition part. The electrode terminals are exposed outside the battery cell and are used for electrical connection with an external circuit.
  • the electrode assembly is the winding core inside the battery cell, which is the part where the electrochemical reaction occurs in the battery cell, and the electrode assembly is located in the casing.
  • the electrode assembly is formed by stacking or winding a first pole piece, a second pole piece and an insulating membrane between the first pole piece and the second pole piece.
  • One of the first pole piece and the second pole piece is a positive pole piece, and the other is a negative pole piece.
  • the part of the positive pole piece and the negative pole piece with the active material constitutes the main body of the electrode assembly, and the part of the positive pole piece and the negative pole piece that does not have the active material Each of them constitutes a tab, and the positive tab tab and the negative tab tab can be located at one end of the main body or at both ends of the main body.
  • the active material of the positive electrode sheet and the active material of the negative electrode sheet react with the electrolyte, and the tabs can facilitate the electrical connection between the winding core and the electrode terminals to form a current loop.
  • the electrode terminal is a part for the battery cell to transmit electric energy to the outside
  • the transfer part is a part for electrically connecting the electrode assembly and the electrode terminal in the battery cell.
  • a notch with a certain depth on the surface of the top cover of the battery cell.
  • the notch here is the top cover of the battery cell.
  • the weak part of the battery cell when the internal air pressure of the battery cell rises to a certain level, that is, when it reaches the limit pressure that the notch can withstand, the notch will automatically rupture and reduce the pressure to prevent the battery cell from bursting due to the increase in internal air pressure .
  • This safety valve usually includes a valve body installed on the top cover of the battery cell and a valve core located in the valve body. The valve core is installed on the valve body through a spring.
  • a vent hole is processed on the valve body.
  • the spool of the safety valve can isolate the vent hole on the valve body from the battery inside the battery cell.
  • the spool of the safety valve leaves the isolation state, and the internal environment of the cell of the battery cell can communicate with the vent hole on the valve body of the safety valve. In this way, the effect of pressure relief can be played.
  • the first type of pressure relief used in the battery cell is a self-destructive pressure relief form, that is, the notch on the top cover of the battery cell can only be used once, and the effect is not good in actual use.
  • the second form of pressure relief can realize automatic pressure relief, the gap between the spool of the safety valve and the valve body is too large after it leaves the isolation state, resulting in insufficient airtightness between the spool and the valve body. It is guaranteed that the electrolyte inside the battery cell can easily flow out from the gap between the spool of the safety valve and the valve body, and then flow out from the vent hole on the valve body, causing the battery to leak.
  • the contact area between the valve core and the valve body is reduced, and line contact is used, which will seriously weaken the airtightness between the valve core and the valve body.
  • the pressure relief device can take the form of a channel for pressure relief, that is, process a pressure relief channel that can be connected and disconnected in the pressure relief device, and the pressure relief channel is in a connected state
  • the gas inside the battery can be discharged along the pressure release channel in time, and the airtightness of the pressure release device can be better guaranteed when the pressure release channel is in a disconnected state.
  • a gas permeable membrane is installed at the opening of the pressure relief channel, and the gas permeable membrane is used to ensure that the electrolyte will not flow out along the pressure relief channel.
  • the airtightness of the pressure relief device can be ensured under the condition of realizing the automatic pressure relief of the battery cell, that is, the gas will not leak from the parts of the pressure relief device.
  • the assembly gap of the pressure relief device flows out, but flows out along the pressure relief channel. Since the pressure relief device adopts the channel form for pressure relief, the electrolyte will not easily flow out from the assembly gap in the pressure relief device, and the gas installed at the opening of the pressure relief channel
  • the permeable membrane can prevent the electrolyte inside the battery cell from flowing out along the pressure relief channel when the gas is discharged, and has good air tightness.
  • the gas permeable membrane here is a permeable membrane that allows gas to pass through but blocks liquid.
  • the top cover assembly provided in the embodiment of the present application can be used, but not limited to, in lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-ion batteries, or magnesium-ion batteries, which is not limited in the embodiments of the present application.
  • the battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • the top cover assembly for a flat battery cell is used as an example for illustration.
  • the top cover 10 is used to connect with the shell of the battery cell, the top cover 10 is provided with a through hole 110;
  • the installation hole 210 of the installation hole 210 and the first passage 220 extending from the hole wall of the installation hole 210 to the outside world, the opening of the first passage 220 communicating with the outside world is provided with a first gas permeable membrane 40;
  • the pressure relief valve 30 is arranged on the connector 20 In the mounting hole 210, and can slide in the mounting hole 210 under pressure, the pressure relief valve 30 is provided with a second channel 310, one end of the second channel 310 communicates with the side of the top cover 10 away from the connecting piece 20, the second The other end of the second channel 310 is switchable between a sealing state and a pressure releasing state.
  • the other end of the second channel 310 is staggered from the opening of the first channel 220 at the hole wall of the mounting hole 210 ;
  • the other end of the second channel 310 communicates with the opening of the first channel 220 at the wall of the installation hole 210 to release pressure to the outside.
  • the connecting piece 20 is arranged on the top cover 10 and is used to fix the pressure relief valve 30.
  • the connecting piece 20 can be fixed on the top cover 10 by welding, or can be fixed on the top cover 10 by fasteners such as bolts, or It can be fixed on the top cover 10 by connecting with components such as poles 70 on the top cover 10 , which is not limited in this embodiment of the present application.
  • the connecting member 20 is provided with a mounting hole 210 communicating with the through hole 110 on the top cover 10 , which means that the mounting hole 210 on the connecting member 20 and the through hole 110 on the top cover 10 at least partially overlap.
  • the first channel 220 extending from the wall of the mounting hole 210 to the outside on the connecting piece 20 means that the body of the connecting piece 20 is provided with a first channel 220 , and the opening at one end of the first channel 220 is located on the wall of the mounting hole 210 Above, the opening at the other end of the first channel 220 is located on the surface of the connecting member 20 where it can communicate with the outside world.
  • the pressure relief valve 30 is a component that is arranged on the connecting piece 20 and cooperates with the connecting piece 20 to perform pressure relief.
  • the pressure relief valve 30 is provided with a second channel 310, and one end of the second channel 310 is connected to the top cover 10 away from the connecting piece 20.
  • One side communication refers to the second channel 310 provided on the body of the pressure relief valve 30 , wherein the opening at one end can communicate with the side of the top cover 10 away from the connecting piece 20 , while the opening at the other end can slide in the pressure relief valve 30 During the process, change between the sealed state and the pressure relief state.
  • the through hole 110 provided on the top cover 10 communicates with the internal environment where the electrode assembly is located.
  • the battery cell generates gas during use. As the air pressure continues to increase, the gas can The pressure relief valve 30 is pushed through the through hole 110 provided on the top cover 10 , that is, the pressure relief valve 30 will slide in the installation hole 210 of the connecting piece 20 under the action of pressure.
  • both the pressure relief valve 30 and the connector 20 are in the state of isolating the internal environment of the battery cell from the external environment, that is, the gas inside the battery cell cannot pass through the second channel 310 of the pressure relief valve 30 , along the first channel 310 of the connector 20 .
  • the channel 220 flows out to the external environment, at this time, the pressure relief valve 30 is used in the sealing state in the top cover assembly.
  • both the pressure relief valve 30 and the connector 20 are in a state of communicating with the internal environment of the battery cell and the external environment, that is, the gas inside the battery cell can pass through the second channel 310 of the pressure relief valve 30 and pass through the second channel 310 of the connector 20 .
  • a passage 220 leads out to the ambient, at which point the pressure relief valve 30 is used in the top cover assembly for a pressure relief condition.
  • a pressure relief structure in the form of a channel in the top cover assembly, the airtightness of the assembly gap between the pressure relief valve 30 and the connector 20 can be ensured, so that the electrolyte will not easily flow from the pressure relief valve 30 and the connector 20. It flows out from the assembly gap to ensure the airtightness of the pressure relief device.
  • a first gas permeable membrane 40 is installed at the opening where the first channel 220 communicates with the outside world, which can prevent the battery cell from leaking when the gas is discharged.
  • the electrolyte inside the body flows out along the first channel 220, preventing the electrolyte inside the battery cell from flowing out of the cell from the pressure relief device to cause battery leakage.
  • the first channel 220 includes a first discharge section 221 and a second discharge section 222 that communicate with each other, and the first discharge section 221 communicates with the installation hole 210, And extending along a direction perpendicular to the central axis X of the installation hole 210 , the second discharge section 222 is used to communicate with the outside and extends along a direction parallel to the central axis X of the installation hole 210 .
  • the first discharge section 221 and the second discharge section 222 are two sections of the first channel 220, and the first discharge section 221 and the second discharge section 222 respectively extend in different directions on the body of the connector 20, where the mounting holes
  • the central axis X of 210 refers to the axis of symmetry of the installation hole 210 , and is parallel to the depth direction of the installation hole 210 .
  • one end of the first channel 220 can communicate with the mounting hole 210 at the hole wall of the mounting hole 210, that is, the first channel 220 The opening at one end faces the central axis X of the mounting hole 210 .
  • the other end of the second channel 310 can communicate with the outside on the side away from the top cover 10, that is, the other end of the second channel 310
  • the opening at one end faces the side of the connecting piece 20 away from the top cover 10 , so as to facilitate the collection and subsequent treatment of the gas discharged from the first channel 220 of the connecting piece 20 .
  • the connecting member 20 is provided with a fixing hole 230 communicating with the first discharge section 221 , and the temperature sensing element 50 is arranged in the fixing hole 230 .
  • the fixing hole 230 communicating with the first discharge section 221 means that the fixing hole 230 overlaps with the first discharge section 221 at least partially, and the temperature sensing element 50 arranged in the fixing hole 230 refers to a component that can output a signal as the temperature changes, for example, a thermocouple , Thermistors, bimetallic strips, temperature-sensitive sheets.
  • the temperature sensing element 50 By arranging the temperature sensing element 50 in the fixing hole 230, when the pressure relief valve 30 and the connecting piece 20 are in the pressure relief state, the temperature of the gas flowing out from the first channel 220 can be sensed, and a signal can be transmitted to the control system in the battery, Therefore, the electric device can receive the abnormal temperature signal of the battery, and monitor the thermal runaway of the battery. At the same time, the temperature sensing element 50 arranged in the fixing hole 230 will not affect the discharge of gas from the first channel 220, and if the air pressure inside the battery cell exceeds a certain threshold, the temperature sensing element 50 will also be pushed away, so that the first The channel 220 is capable of simultaneously releasing pressure to the outside from the two openings.
  • the second channel 310 includes a first pressure relief section 311 and a second pressure relief section 312 communicating with each other, and the first pressure relief section 311 is also connected to the top
  • the side of the cover 10 away from the connector 20 communicates and extends along a direction parallel to the central axis X of the installation hole 210
  • the second pressure relief section 312 extends along a direction perpendicular to the central axis X of the installation hole 210 .
  • the first pressure relief section 311 and the second pressure relief section 312 are two sections of the second channel 310 , and the first pressure relief section 311 and the second pressure relief section 312 respectively extend in different directions on the body of the pressure relief valve 30 .
  • one end of the second passage 310 can communicate with the side of the top cover 10 away from the connecting piece 20, that is, the end of the second passage 310 The opening at one end faces the side of the top cover 10 away from the connecting piece 20 .
  • the second pressure relief section 312 By setting the second pressure relief section 312 extending in a direction perpendicular to the central axis X of the installation hole 210, that is, the opening of the other end of the second passage 310 is directed away from the central axis X of the installation hole 210, so that the second passage 310
  • the other end of the can be switched between the sealing state and the pressure releasing state when sliding relative to the hole wall of the mounting hole 210 .
  • the top cover assembly further includes an elastic member 60, one end of the elastic member 60 is connected to the hole wall of the mounting hole 210 away from the top cover 10, and the other end of the elastic member 60 is connected to the pressure relief valve. 30 connections.
  • the elastic member 60 is a component capable of returning to its original size and shape after deformation, such as a spring or a shrapnel.
  • the pressure relief valve 30 can automatically return to its original position after being moved under the action of pressure, so as to realize the automatic pressure relief of the battery cells.
  • the installation hole 210 runs through the body of the connector 20, one end of the elastic member 60 is fixed to the sealing member 61, the other end of the elastic member 60 is pressed on the pressure relief valve 30, and the sealing member 61 is fixed at the opening of the mounting hole 210 away from the end of the top cover 10 , and can seal the opening of the mounting hole 210 away from the top cover 10 while playing the role of connecting the elastic member 60 .
  • the pressure relief valve 30 includes a connected main body portion 320 and a protruding portion 330; as shown in FIG. 7 , the installation hole 210 includes axially distributed The first hole wall surface 211, the step surface 212 and the second hole wall surface 213, the main body 320 of the pressure relief valve 30 is slidably connected with the first hole wall surface 211, the protrusion 330 is slidably connected with the second hole wall surface 213, and the stepped surface 212 is used. to limit the sliding position of the protruding portion 330 .
  • the main body 320 is the main body of the pressure relief valve 30
  • the second channel 310 is disposed on the main body 320 of the pressure relief valve 30
  • the protruding portion 330 is the part of the pressure relief valve 30 protruding from the main body 320 .
  • the axial direction of the installation hole 210 refers to the depth direction of the installation hole 210.
  • the first hole wall surface 211, the step surface 212 and the second hole wall surface 213 are the surfaces at different positions on the installation hole 210 wall, and the step surface 212 is the surface at the first hole.
  • a stepped surface is formed between the wall surface 211 and the second hole wall surface 213 .
  • the main body part 320 can be connected with the first hole wall surface.
  • One hole wall surface 211 cooperates, and the protrusion 330 cooperates with the second hole wall surface 213, and the stepped surface 212 can be used to restrict the protrusion 330 from sliding only on the first hole wall surface 211, thereby restricting the pressure relief valve 30 from being installed in the installation hole. The sliding distance within 210.
  • the top cover assembly further includes a pole 70
  • the top cover 10 is provided with a pole hole 120
  • the through hole 110 is arranged adjacent to the pole hole 120
  • the pole 70 passes through the pole
  • the hole 120 is riveted with the connector 20 .
  • the pole 70 is a part arranged on the top cover 10 and electrically connected to the electrode assembly of the battery cell.
  • the pole 70 provided on the top cover 10 is divided into a positive pole and a negative pole. Electrically connected, the negative pole is electrically connected with the negative tab of the electrode assembly.
  • a fixed foundation can be provided for the pole 70 to be arranged on the top cover 10, that is, the pole 70 can pass through the pole on the top cover 10
  • the hole 120 is riveted with the connecting piece 20 to fix the pole 70 on the top cover 10 .
  • arranging the pressure relief device including the connecting piece 20 and the pressure relief valve 30 at the location of the pole 70 can save space for the explosion-proof valve on the top cover assembly.
  • the connector 20 is provided with a riveting hole 240, the hole wall of the riveting hole 240 is stepped, the side wall of the pole 70 is also stepped, the side wall of the pole 70 and the hole of the riveting hole 240 on the connector 20
  • the walls are adapted so as to be riveted with the connector 20
  • the pole 70 here can be a positive pole or a negative pole, that is, the connector 20 can be arranged on the positive pole or the negative pole, or on both the positive pole and the negative pole, so as to realize leakage at the positive pole or the negative pole. pressure, or pressure relief at both the positive and negative poles.
  • Riveting the connecting piece 20 on the positive pole or the negative pole alone can realize pressure relief at the position where the positive pole or the negative pole is located. For battery cells that produce a lot of gas, pressure relief can be achieved at both the positive pole and the negative pole.
  • the top cover assembly shown in Figure 1 as an example, if the pole 70 on the right side of the figure is the positive pole, Then the pole on the left side of the drawing is the negative pole.
  • the pressure relief valve 30 provided on the connector 20 can realize pressure relief at the position of the positive pole.
  • the pressure relief valve provided on the connecting piece can realize pressure relief at the position of the negative pole, that is to say, in the top cover assembly, a valve corresponding to the two poles can be formed.
  • the structure of the two pressure relief valves is designed to meet the pressure relief rate requirements of the battery cells.
  • the top cover assembly further includes a first plastic part 80, the first plastic part 80 is arranged between the connecting part 20 and the top cover 10, and the first plastic part 80 is provided with a The pole 70 passes through the first through hole 810 and the pressure relief valve 30 passes through the second through hole 820 .
  • the first plastic part 80 is a part made of plastic and has good sealing performance.
  • the airtightness at the contact position between the connector 20 and the top cover 10 can be ensured. After the pole 70 passes through the pole hole 120 on the top cover 10 and is riveted with the connector 20, The first plastic part 80 is compressed, so that the sealing effect is achieved through the first plastic part 80 .
  • the top cover assembly further includes a second plastic part 90, the second plastic part 90 is arranged on the side of the top cover 10 away from the connecting part 20, and the second plastic part 90 is provided with The third via hole 910 through which the pole 70 passes and the fourth via hole 920 communicated with the through hole 110 .
  • the second plastic part 90 is also a component made of plastic and has better sealing performance.
  • the second plastic part 90 By setting the second plastic part 90, the airtightness of the side of the top cover 10 away from the connecting part 20 can be ensured. After the 120 is riveted with the connecting part 20 , the second plastic part 90 can be compressed, so that the sealing effect can be achieved through the second plastic part 90 .
  • the second gas permeable membrane 41 is disposed in the fourth via hole 920 .
  • the second gas permeable membrane 41 is a permeable membrane that allows gas to pass through but blocks liquid.
  • the embodiment of the present application also discloses a battery cell (not shown in the figure), including a casing, an electrode assembly and the top cover assembly in the above embodiment, wherein the casing has an inner cavity and an opening communicating with the inner cavity, The electrode assembly is arranged in the inner cavity of the casing, and the top cover 10 of the top cover assembly is connected with the casing and closes the opening of the casing.
  • the battery cell disclosed in the embodiment of the present application can ensure the airtightness of the assembly gap between the pressure relief valve 30 and the connector 20 by providing a pressure relief structure in the form of a channel in the top cover assembly, so that the electrolyte will not easily It flows out from the assembly gap between the pressure relief valve 30 and the connecting piece 20.
  • a first gas permeable membrane 40 is installed at the opening of the first channel 220 communicating with the outside world, which can prevent the battery cell when the gas is discharged.
  • the electrolyte inside the body flows out along the first channel 220, so as to ensure the airtightness of the pressure relief device, and prevent the electrolyte inside the battery cell from easily flowing out of the cell from the pressure relief device to cause battery leakage.
  • the embodiment of the present application also discloses a battery, including the battery cells in the above embodiments.
  • the battery disclosed in the embodiment of the present application can be used in but not limited to electric devices such as vehicles, ships or aircrafts.
  • the disclosed battery module composes the power supply system of the electrical device.
  • the embodiment of the present application also discloses an electric device, including the battery in the above embodiment, and the battery is used to provide electric energy for the electric device.
  • the electrical devices disclosed in the embodiments of the present application may be, but not limited to, mobile phones, tablets, notebook computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, and the like.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • the present application provides a top cover assembly.
  • a first channel 220 is provided on the connecting piece 20 body. The opening at one end of the first channel 220 faces the central axis X of the installation hole 210. The first channel 220 The opening at the other end faces the side away from the top cover 10, a first gas permeable membrane 40 is provided at the opening where the first passage 220 communicates with the outside world, a second passage 310 is provided on the body of the pressure relief valve 30, and one end of the second passage 310 The opening of the second channel 310 faces the side of the top cover 10 away from the connecting piece 20, the opening of the other end of the second channel 310 faces away from the central axis X of the mounting hole 210, and the pressure relief valve 30 is installed in the mounting hole 210 of the connecting piece 20 via a spring.
  • the connecting piece 20 is provided with a fixing hole 230 connected to the first passage 220, and the temperature sensing element 50 is installed in the fixing hole 230, and the pole 70 passes through the third passage on the second plastic part 90 after the sealing ring 71 is fitted.
  • the hole 910, the through hole 110 on the top cover 10 and the first via hole 810 on the first plastic part 80 are riveted with the connector 20, and the positive pole 70 and the negative pole 70 on the top cover 10 are riveted with a connector 20,
  • the second gas permeable membrane 41 is installed in the fourth via hole 920 of the second plastic part 90 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请实施例涉及电池生产技术领域，公开了一种顶盖组件、电池单体、电池及用电装置，其中的顶盖组件包括顶盖、连接件和泄压阀，顶盖用于与电池单体的壳体连接，顶盖上设置有通孔；连接件设置在顶盖上，连接件设置有与通孔连通的安装孔和自安装孔的孔壁延伸至外界的第一通道，第一通道与外界连通的开口处设置有第一气体渗透膜；泄压阀设置在安装孔内、并可在压力作用下于安装孔内滑动，泄压阀上设置有第二通道。

Description

顶盖组件、电池单体、电池及用电装置
本申请要求享有于2021年10月25日提交的名称为“顶盖组件、电池单体、电池及用电装置”的中国专利申请202122577576.2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
本申请实施例涉及电池生产技术领域，特别涉及一种顶盖组件、电池单体、电池及用电装置。
 背景技术
电池作为日常生活中重要的能量来源，具有容量高、循环寿命长的特点。目前得到广泛应用的电池主要以锂离子电池为主，锂离子电池在工作电压、能量密度、循环寿命等方面都具有显著优势。但是锂离子电池在使用过程中，内部会产生气体，导致电池内部压力不断升高，如果不及时泄压，会导致电池出现爆炸事故。
为了使电池能够及时泄压，通常会在电池单体的顶盖处设计泄压装置，泄压装置可以在电池单体内部的压力到达一定值后，实现自动泄压。但是目前电池单体中用到的泄压装置存在气密性不足的问题，电池单体内部的电解液极易从泄压装置处流出电芯，造成电池漏液。
 技术问题
本申请实施例的目的在于提供一种顶盖组件、电池、电池单体及用电装置，能够确保泄压装置处的气密性，防止电池单体内部的电解液轻易从泄压装置处流出电芯而造成电池漏液。
 技术解决方案
本申请实施例提供了一种顶盖组件，包括顶盖、连接件和泄压阀，顶盖用于与电池单体的壳体连接，所述顶盖上设置有通孔；连接件设置在所述顶盖上，所述连接件设置有与所述通孔连通的安装孔和自所述安装孔的孔壁延伸至外界的第一通道，所述第一通道与外界连通的开口处设置有第一气体渗透膜；泄压阀设置在所述安装孔内、并可在压力作用下于所述安装孔内滑动，所述泄压阀上设置有第二通道，所述第二通道的一端与所述顶盖远离所述连接件的一侧连通，所述第二通道的另一端可在密封状态和泄压状态之间变换；在所述密封状态下，所述第二通道的另一端与所述第一通道在所述安装孔的孔壁上的开口相互错开；在所述泄压状态下，所述第二通道的另一端与所述第一通道在所述安装孔的孔壁上的开口相互连通、以向外界泄压。
本申请实施例还提供了一种电池单体，包括壳体、电极组件和上述实施例中的顶盖组件，壳体具有内腔以及连通所述内腔的开口；电极组件设置在所述内腔中；所述顶盖组件的所述顶盖与所述壳体连接、并封闭所述开口。
本申请实施例还提供了一种电池，包括上述实施例中的电池单体。
本申请实施例还提供了一种用电装置，包括上述实施例中的电池。
在一些实施例中，所述第一通道包括相互连通的第一排出段和第二排出段，所述第一排出段与所述安装孔连通、且沿垂直于所述安装孔的中心轴线的方向延伸，所述第二排出段用于与外界连通、且沿平行于所述安装孔的中心轴线的方向延伸。这样，可以使第一通道的一端的开口朝向安装孔的中心轴线，第二通道的另一端的开口朝向连接件远离顶盖的一侧。
在一些实施例中，所述连接件设置有与所述第一排出段连通的固定孔，所述固定孔内设置有感温元件。这样，可以在泄压阀与连接件处于泄压状态时，感应自第一通道流出的气体的温度并向电池中的控制系统传输信号，从而使得用电装置能够接收电池温度异常信号，对电池的热失控进行监控。
在一些实施例中，所述第二通道包括相互连通的第一泄压段和第二泄压段，所述第一泄压段还与所述顶盖远离所述连接件的一侧连通、且沿平行于所述安装孔的中心轴线的方向延伸，所述第二泄压段沿垂直于所述安装孔的中心轴线的方向延伸。这样，可以使第二通道的一端的开口朝向顶盖远离连接件的一侧，第二通道的另一端的开口的朝向远离安装孔的中心轴线。
在一些实施例中，所述顶盖组件还包括弹性件，所述弹性件的一端与所述安装孔远离所述顶盖的孔壁连接，所述弹性件的另一端与所述泄压阀连接。这样，使得泄压阀在压力作用下移动后，可以自动恢复原来位置，以实现电池单体的自动泄压。
在一些实施例中，所述泄压阀包括相连的主体部和凸出部，所述安装孔包括沿轴向分布的第一孔壁面、台阶面和第二孔壁面，所述主体部与所述第一孔壁面滑动连接，所述凸出部与所述第二孔壁面滑动连接，所述台阶面用于限制所述凸出部的滑动位置。这样，可以使得主体部与第一孔壁面配合，凸出部与第二孔壁面配合，而台阶面可以用于限制凸出部仅在第一孔壁面上滑动。
在一些实施例中，所述顶盖组件还包括极柱，所述顶盖上设置有极柱孔，所述通孔邻近所述极柱孔设置，所述极柱穿过所述极柱孔并与所述连接件铆接。这样，通过将连接件的通孔邻近顶盖上的极柱孔设置，可以为极柱设置在顶盖上提供固定基础，即极柱可以穿过顶盖上的极柱孔与连接件铆接，从而将极柱固定在顶盖上。
在一些实施例中，所述顶盖组件还包括第一塑胶件，所述第一塑胶件设置在所述连接件与所述顶盖之间，且所述第一塑胶件设置有供所述极柱穿过的第一过孔和供所述泄压阀穿过的第二过孔。这样，通过设置第一塑胶件，可以确保连接件与顶盖之间接触位置处的气密性。
在一些实施例中，所述顶盖组件还包括第二塑胶件，所述第二塑胶件设置在所述顶盖远离所述连接件的一侧，且所述第二塑胶件设置有供所述极柱穿过的第三过孔和与所述通孔连通的第四过孔。这样，通过设置第二塑胶件，可以确保顶盖远离连接件一侧的气密性。
在一些实施例中，所述第四过孔内设置有第二气体渗透膜。这样，可以确保电解液不会从第二塑胶件的第四过孔流至顶盖的通孔内。
 有益效果
本申请实施例提供的顶盖组件、电池单体、电池及用电装置，通过在顶盖组件中设置通道形式的泄压结构，可以确保泄压阀与连接件二者装配间隙的气密性，使电解液不会轻易地从泄压阀与连接件的装配间隙中流出，确保泄压装置处的气密性，同时，安装在第一通道与外界连通的开口处设置有第一气体渗透膜，可以在使气体排出的情况下，阻止电池单体内部的电解液沿第一通道流出，防止电池单体内部的电解液从泄压装置处流出电芯而造成电池漏液。
 附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的组件表示为类似的组件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请实施例提供的顶盖组件的爆炸结构示意图；
图2是本申请实施例提供的顶盖组件的俯视结构示意图；
图3是泄压阀用于密封状态时、顶盖组件沿图2中A-A向的剖视结构示意图；
图4是图3中B部的放大结构示意图；
图5是泄压阀用于泄压状态时、顶盖组件沿图2中A-A向的剖视结构示意图；
图6是图5中C部的放大结构示意图；
图7是连接件沿图2中A-A向的剖视放大结构示意图；
图8是泄压阀沿图2中A-A向的剖视放大结构示意图。
附图标记：
10、顶盖；110、通孔；120、极柱孔；
20、连接件；210、安装孔；211、第一孔壁面；212、台阶面；213、第二孔壁面；220、第一通道；221、第一排出段；222、第二排出段；230、固定孔；240、铆接孔；
30、泄压阀；310、第二通道；311、第一泄压段；312、第二泄压段；320、主体部；330、凸出部；
40、第一气体渗透膜；41、第二气体渗透膜；
50、感温元件；
60、弹性件；61、密封件；
70、极柱；
80、第一塑胶件；810、第一过孔；820、第二过孔；
90、第二塑胶件；910、第三过孔；920、第四过孔。
 本发明的实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文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；本文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。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“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。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，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，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上（包括两个），同理，“多组”指的是两组以上（包括两组），“多片”指的是两片以上（包括两片）。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或组件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个组件内部的连通或两个组件的相互作用关系。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实施例中的具体含义。
锂离子电池在能源不断出现危机的今天变得极其重要，可以满足人们现代绿色环保生活的需求。但是锂离子电池在使用过程中，电池单体内部的电解液会分解并产生气体，导致电池单体内部气压升高，严重时电池会出现爆炸。因此，通常会在电池单体的顶盖处设计泄压装置。
电池单体一般包括壳体、电极组件、电极端子和顶盖等，电池单体的壳体为容纳电极组件的部件，电池单体的顶盖为封闭电池单体的壳体的部件，顶盖盖合于壳体的开口处，以将电池单体的内部环境与外部环境隔绝。电极组件设置在壳体内部，并通过转接部件与电极端子电连接。电极端子露出电池单体外部，用于与外部电路电连接。电极组件为电池单体内部的卷芯，是电池单体中发生电化学反应的部件，电极组件位于壳体内。电极组件由第一极片、第二极片及位于第一极片和第二极片之间的绝缘隔膜一同堆叠或卷绕形成。第一极片和第二极片中的一个为正极片，另一个为负极片，正极片和负极片具有活性物质的部分构成电极组件的主体部，正极片和负极片不具有活性物质的部分各自构成极耳，正极片极耳和负极片极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极片活性物质和负极片活性物质与电解液发生反应，极耳可以方便卷芯与电极端子之间的电连接，以形成电流回路。电极端子为电池单体向外传输电能的部件，转接部件在电池单体中为电性连接电极组件和电极端子的部件。
目前，锂离子电池常用的泄压装置主要有两种形式，一种是在电池单体的顶盖表面上加工具有一定深度的刻痕，这里的刻痕即电池单体的顶盖上加工出的薄弱部分，当电池单体内部气压升高到一定程度时，即到达刻痕所能承受的极限压力时，刻痕处会自动破裂降压，以防止电池单体因内部气压升高而爆裂。另外一种是在电池单体的顶盖处加工安全阀，这种安全阀通常包括安装在电池单体的顶盖上的阀体，及位于阀体内的阀芯，阀芯通过弹簧安装在阀体内，在阀体上加工有排气孔，在电池内部压力没有到达使弹簧出现弹性变形的情况下，安全阀的阀芯可以隔绝阀体上的排气孔与电池单体内部的电芯，在电池单体内部压力到达使弹簧出现弹性变形的情况下，安全阀的阀芯离开隔绝状态，电池单体的电芯所处的内部环境可以与安全阀的阀体上的排气孔连通，这样，即可起到泄压的作用。
但是申请人注意到，在电池单体中使用的第一种泄压形式采用自毁式的泄压形式，即电池单体的顶盖上的刻痕只能使用一次，在实际使用中效果不佳；而第二种泄压形式虽然能够实现自动泄压，但是安全阀的阀芯在离开隔绝状态后，与阀体之间的缝隙过大，导致阀芯与阀体间的气密性无法得到保证，电池单体内部的电解液极易从安全阀的阀芯与阀体间的缝隙流出，进而从阀体上的排气孔流出，造成电池漏液。特别是一些安全阀中为了减小阀芯在移动过程中的阻力，将阀芯与阀体间的接触面积减小，采用线接触，这样会严重削弱阀芯与阀体间的气密性。
为了确保泄压装置处的气密性，申请人发现可以在泄压装置中采取通道形式进行泄压，即在泄压装置中加工可以连通和断开的泄压通道，泄压通道处于连通状态时，电池内部的气体可以及时沿泄压通道排出，而当泄压通道处于断开状态时，泄压装置处的气密性可以得到较好地保证。同时，在泄压通道的开口处安装气体渗透膜，通过气体渗透膜来确保电解液不会沿泄压通道流出。
在电池单体采用具有这样的泄压装置的顶盖组件时，能够在实现电池单体自动泄压的情况下，确保泄压装置处的气密性，即气体不会从泄压装置中部件的装配间隙流出，而是沿泄压通道流出，由于泄压装置采用通道形式进行泄压，电解液不会轻易地从泄压装置中的装配间隙流出，而且安装在泄压通道开口处的气体渗透膜，可以在排出气体的情况下，阻止电池单体内部的电解液沿泄压通道流出，具有较好的气密性。
此处的气体渗透膜为容许气体透过而阻隔液体的渗透膜。
本申请实施例提供的顶盖组件可以但不限用于锂离子二次电池、锂离子一次电池、锂硫电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其他形状等，本申请实施例对此也不限定。
此处以用于扁平体的电池单体的顶盖组件为例进行说明，如图1至图6所示，本申请实施例提供的顶盖组件包括顶盖10、连接件20和泄压阀30，顶盖10用于与电池单体的壳体连接，顶盖10上设置有通孔110；连接件20设置在顶盖10上，连接件20设置有与顶盖10上的通孔110连通的安装孔210和自安装孔210的孔壁延伸至外界的第一通道220，第一通道220与外界连通的开口处设置有第一气体渗透膜40；泄压阀30设置在连接件20的安装孔210内、并可在压力作用下于安装孔210内滑动，泄压阀30上设置有第二通道310，第二通道310的一端与顶盖10远离连接件20的一侧连通，第二通道310的另一端可在密封状态和泄压状态之间变换。
在图4所示的密封状态下，第二通道310的另一端与第一通道220在安装孔210的孔壁处的开口相互错开；
在图6所示的泄压状态下，第二通道310的另一端与第一通道220在安装孔210的孔壁处的开口相互连通、以向外界泄压。
连接件20为设置在顶盖10上、用于固定泄压阀30的部件，连接件20可以通过焊接固定在顶盖10上，也可以通过螺栓等紧固件固定在顶盖10上，或者可以通过与顶盖10上的极柱70等部件连接而固定在顶盖10上，本申请实施例对此不作限定。连接件20设置有与顶盖10上的通孔110连通的安装孔210，指连接件20上的安装孔210与顶盖10上的通孔110至少部分发生重叠。连接件20上自安装孔210的孔壁延伸至外界的第一通道220，指在连接件20的本体上设置有第一通道220，第一通道220的一端的开口位于安装孔210的孔壁上，第一通道220的另一端的开口位于连接件20的表面上能够与外界连通的位置。
泄压阀30为设置在连接件20上、与连接件20配合进行泄压的部件，泄压阀30上设置有第二通道310，第二通道310的一端与顶盖10远离连接件20的一侧连通，指泄压阀30的本体上设置的第二通道310，其中一端的开口能够与顶盖10远离连接件20的一侧连通，而另一端的开口则能够在泄压阀30滑动过程中，在密封状态和泄压状态之间变换。
顶盖10与电池单体的壳体连接时，顶盖10上设置的通孔110与电极组件所在的内部环境连通，电池单体在使用过程中产生气体，随着气压不断增大，气体可以通过顶盖10上设置的通孔110对泄压阀30发生推动作用，即泄压阀30会在压力作用下于连接件20的安装孔210内滑动。
当泄压阀30位于第二通道310的另一端与第一通道220在安装孔210的孔壁上的开口相互错开时，即泄压阀30的第二通道310的另一端处于密封状态时，泄压阀30与连接件20二者处于隔绝电池单体的内部环境和外界环境的状态，即电池单体内部的气体无法经泄压阀30的第二通道310，沿连接件20的第一通道220流出外界环境，此时，泄压阀30在顶盖组件中用于密封状态。
当泄压阀30位于第二通道310的另一端与第一通道220在安装孔210的孔壁上的开口相互连通时，即泄压阀30的第二通道310的另一端处于泄压状态时，泄压阀30与连接件20二者处于连通电池单体的内部环境和外界环境的状态，即电池单体内部的气体可以经泄压阀30的第二通道310，沿连接件20的第一通道220流出外界环境，此时，泄压阀30在顶盖组件中用于泄压状态。
通过在顶盖组件中设置通道形式的泄压结构，可以确保泄压阀30与连接件20二者装配间隙的气密性，使电解液不会轻易地从泄压阀30与连接件20的装配间隙中流出，确保泄压装置处的气密性，同时，安装在第一通道220与外界连通的开口处设置有第一气体渗透膜40，可以在使气体排出的情况下，阻止电池单体内部的电解液沿第一通道220流出，防止电池单体内部的电解液从泄压装置处流出电芯而造成电池漏液。
在本申请的一些实施例中，可选地，如图7所示，第一通道220包括相互连通的第一排出段221和第二排出段222，第一排出段221与安装孔210连通、且沿垂直于安装孔210的中心轴线X的方向延伸，第二排出段222用于与外界连通、且沿平行于安装孔210的中心轴线X的方向延伸。
第一排出段221和第二排出段222为第一通道220的两个分段，第一排出段221和第二排出段222分别在连接件20本体上沿不同的方向延伸，此处安装孔210的中心轴线X指安装孔210的对称轴线，平行于安装孔210的深度方向。
通过设置沿垂直于安装孔210的中心轴线X的方向延伸的第一排出段221，可以使第一通道220的一端在安装孔210的孔壁处与安装孔210连通，即第一通道220的一端的开口朝向安装孔210的中心轴线X。通过设置沿平行于安装孔210的中心轴线X的方向延伸的第二排出段222，可以使第二通道310的另一端在远离顶盖10的一侧与外界连通，即第二通道310的另一端的开口朝向连接件20远离顶盖10的一侧，方便对自连接件20的第一通道220排出的气体进行收集及后续处理。
在本申请的一些实施例中，可选地，连接件20设置有与第一排出段221连通的固定孔230，固定孔230内设置有感温元件50。
与第一排出段221连通的固定孔230指固定孔230与第一排出段221至少部分重叠，固定孔230内设置的感温元件50指能够随温度变化而输出信号的组件，例如，热电偶，热敏电阻，双金属片，感温片。
通过在固定孔230内设置感温元件50，可以在泄压阀30与连接件20处于泄压状态时，感应自第一通道220流出的气体的温度，并向电池中的控制系统传输信号，从而使得用电装置能够接收电池温度异常信号，对电池的热失控进行监控。同时，设置在固定孔230内的感温元件50不会影响气体自第一通道220的排出，并且，如果电池单体内部的气压超过一定阈值，也会顶开感温元件50，使第一通道220能够从两个开口同时向外界泄压。
在本申请的一些实施例中，可选地，如图8所示，第二通道310包括相互连通的第一泄压段311和第二泄压段312，第一泄压段311还与顶盖10远离连接件20的一侧连通、且沿平行于安装孔210的中心轴线X的方向延伸，第二泄压段312沿垂直于安装孔210的中心轴线X的方向延伸。
第一泄压段311和第二泄压段312为第二通道310的两个分段，第一泄压段311和第二泄压段312分别在泄压阀30本体上沿不同方向延伸。
通过设置沿平行于安装孔210的中心轴线X的方向延伸的第一泄压段311，可以使第二通道310的一端与顶盖10远离连接件20的一侧连通，即第二通道310的一端的开口朝向顶盖10远离连接件20的一侧。通过设置沿垂直于安装孔210的中心轴线X的方向延伸的第二泄压段312，即第二通道310的另一端的开口的朝向远离安装孔210的中心轴线X，可以使第二通道310的另一端可以相对安装孔210的孔壁滑动时，在密封状态和泄压状态之间变换。
在本申请的一些实施例中，可选地，顶盖组件还包括弹性件60，弹性件60的一端与安装孔210远离顶盖10的孔壁连接，弹性件60的另一端与泄压阀30连接。
弹性件60为在出现变形后，能够恢复原来大小和形状的部件，例如，弹簧，弹片。
通过弹性件60的设置，使得泄压阀30在压力作用下移动后，可以自动恢复原来位置，以实现电池单体的自动泄压。
为了方便在安装孔210内安装弹性件60，安装孔210贯穿连接件20本体，弹性件60的一端与密封件61固定，弹性件60的另一端压持在泄压阀30上，而密封件61则固定在安装孔210远离顶盖10一端的开口处，在起到连接弹性件60的作用的同时，可以对安装孔210远离顶盖10一端的开口进行密封。
在本申请的一些实施例中，可选地，如图8所示，泄压阀30包括相连的主体部320和凸出部330；如图7所示，安装孔210包括沿轴向分布的第一孔壁面211、台阶面212和第二孔壁面213，泄压阀30的主体部320与第一孔壁面211滑动连接，凸出部330与第二孔壁面213滑动连接，台阶面212用于限制凸出部330的滑动位置。
主体部320为泄压阀30的主体部分，第二通道310设置在泄压阀30的主体部320，凸出部330为泄压阀30本体上凸出于主体部320的部分。
安装孔210的轴向指安装孔210的深度方向，第一孔壁面211、台阶面212和第二孔壁面213为安装孔210孔壁上不同位置处的面，台阶面212为在第一孔壁面211和第二孔壁面213之间形成台阶形状的面。
通过在泄压阀30本体上设置主体部320和凸出部330，并且在安装孔210孔壁上设置第一孔壁面211、台阶面212和第二孔壁面213，可以使得主体部320与第一孔壁面211配合，凸出部330与第二孔壁面213配合，而台阶面212可以用于限制凸出部330仅在第一孔壁面211上滑动，从而限制泄压阀30可在安装孔210内滑动的距离。
在本申请的一些实施例中，可选地，顶盖组件还包括极柱70，顶盖10上设置有极柱孔120，通孔110邻近极柱孔120设置，极柱70穿过极柱孔120并与连接件20铆接。
极柱70为设置在顶盖10上、与电池单体的电极组件电连接的部件，顶盖10上设置的极柱70分为正极柱和负极柱，正极柱与电极组件的正极片极耳电连接，负极柱与电极组件的负极片极耳电连接。
通过将连接件20的通孔110邻近顶盖10上的极柱孔120设置，可以为极柱70设置在顶盖10上提供固定基础，即极柱70可以穿过顶盖10上的极柱孔120与连接件20铆接，从而将极柱70固定在顶盖10上。另外，将包括连接件20和泄压阀30的泄压装置设置在极柱70所处位置，可以节省出顶盖组件上设置防爆阀的空间。
此处连接件20上设置有铆接孔240，铆接孔240的孔壁呈阶梯状，极柱70的侧壁同样呈阶梯状，极柱70的侧壁与连接件20上的铆接孔240的孔壁相适配，从而与连接件20进行铆接。另外，这里的极柱70可以为正极柱或者负极柱，即连接件20可以设置在正极柱或者负极柱上，或者同时设置在正极柱和负极柱上，以在正极柱或者负极柱处实现泄压，或者同时在正极柱和负极柱处实现泄压。
单独在正极柱或者负极柱上铆接连接件20，可以单独在正极柱或者负极柱所处位置实现泄压。而对于产气较多的电池单体，可以同时在正极柱和负极柱处实现泄压，以图1中所示的顶盖组件为例，如果图面右侧的极柱70为正极柱，那么图面左侧的极柱则为负极柱，在正极柱穿过顶盖10与连接件20铆接时，该连接件20上设置的泄压阀30可以在正极柱所处位置实现泄压，同时，在负极柱穿过顶盖10与连接件铆接时，该连接件上设置的泄压阀可以在负极柱所处位置实现泄压，即可在顶盖组件中形成与两个极柱对应的两个泄压阀结构，以适应电池单体的泄压速率需求。
在本申请的一些实施例中，可选地，顶盖组件还包括第一塑胶件80，第一塑胶件80设置在连接件20与顶盖10之间，且第一塑胶件80设置有供极柱70穿过的第一过孔810和供泄压阀30穿过的第二过孔820。
第一塑胶件80为采用塑胶制成的部件，具有较好的密封性。
通过设置第一塑胶件80，可以确保连接件20与顶盖10之间接触位置处的气密性，在极柱70穿过顶盖10上的极柱孔120与连接件20铆接后，可以压缩第一塑胶件80，从而通过第一塑胶件80实现密封效果。
在本申请的一些实施例中，可选地，顶盖组件还包括第二塑胶件90，第二塑胶件90设置在顶盖10远离连接件20的一侧，且第二塑胶件90设置有供极柱70穿过的第三过孔910和与通孔110连通的第四过孔920。
第二塑胶件90同样为采用塑胶制成的部件，具有较好的密封性。
通过设置第二塑胶件90，可以确保顶盖10远离连接件20一侧的气密性，在极柱70穿过第二塑胶件90的第三过孔910、顶盖10上的极柱孔120与连接件20铆接后，可以压缩第二塑胶件90，从而通过第二塑胶件90实现密封效果。
在本申请的一些实施例中，可选地，第四过孔920内设置有第二气体渗透膜41。
第二气体渗透膜41与第一气体渗透膜40类似，为容许气体透过而阻隔液体的渗透膜。
通过在第二塑胶件90的第四过孔920内设置第二气体渗透膜41，可以确保电解液不会从第二塑胶件90的第四过孔920流至顶盖10的通孔110内。
本申请实施例还公开了一种电池单体（图中未示出），包括壳体、电极组件和上述实施例中的顶盖组件，其中，壳体具有内腔以及连通内腔的开口，电极组件设置在壳体的内腔中，顶盖组件的顶盖10与壳体连接、并封闭壳体的开口。
本申请实施例公开的电池单体，通过在顶盖组件中设置通道形式的泄压结构，可以确保泄压阀30与连接件20二者装配间隙的气密性，使电解液不会轻易地从泄压阀30与连接件20的装配间隙中流出，同时，安装在第一通道220与外界连通的开口处设置有第一气体渗透膜40，可以在使气体排出的情况下，阻止电池单体内部的电解液沿第一通道220流出，从而确保泄压装置处的气密性，并防止电池单体内部的电解液轻易从泄压装置处流出电芯而造成电池漏液。
本申请实施例还公开了一种电池，包括上述实施例中的电池单体，本申请实施例公开的电池可以但不限用于车辆、船舶或飞行器等用电装置中，可以使用具备本申请公开的电池模组组成该用电装置的电源系统。
本申请实施例还公开了一种用电装置，包括上述实施例中的电池，电池用于为用电装置提供电能。本申请实施例公开的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。
根据本申请的一些实施例，本申请提供了一种顶盖组件，连接件20本体上设置有第一通道220，第一通道220一端的开口朝向安装孔210的中心轴线X，第一通道220另一端的开口朝向远离顶盖10的一侧，第一通道220与外界连通的开口处设置有第一气体渗透膜40，泄压阀30本体上设置有第二通道310，第二通道310一端的开口朝向顶盖10远离连接件20的一侧，第二通道310另一端的开口的朝向远离安装孔210的中心轴线X，泄压阀30经弹簧设置在连接件20的安装孔210内，连接件20上设置有第一通道220连通的固定孔230，固定孔230内安装有感温元件50，极柱70在套装密封圈71后，依次穿过第二塑胶件90上的第三过孔910、顶盖10上的通孔110和第一塑胶件80上的第一过孔810与连接件20铆接，顶盖10上的正极柱70和负极柱70均铆接有一个连接件20，第二塑胶件90的第四过孔920内安装有第二气体渗透膜41。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (13)

  1. 一种顶盖组件，其中，包括：
    顶盖，用于与电池单体的壳体连接，所述顶盖上设置有通孔；
    连接件，设置在所述顶盖上，所述连接件设置有与所述通孔连通的安装孔和自所述安装孔的孔壁延伸至外界的第一通道，所述第一通道与外界连通的开口处设置有第一气体渗透膜；
    泄压阀，设置在所述安装孔内、并可在压力作用下于所述安装孔内滑动，所述泄压阀上设置有第二通道，所述第二通道的一端与所述顶盖远离所述连接件的一侧连通，所述第二通道的另一端可在密封状态和泄压状态之间变换；
    在所述密封状态下，所述第二通道的另一端与所述第一通道在所述安装孔的孔壁上的开口相互错开；
    在所述泄压状态下，所述第二通道的另一端与所述第一通道在所述安装孔的孔壁上的开口相互连通、以向外界泄压。
  2. 根据权利要求1所述的顶盖组件，其中：
    所述第一通道包括相互连通的第一排出段和第二排出段，所述第一排出段与所述安装孔连通、且沿垂直于所述安装孔的中心轴线的方向延伸，所述第二排出段用于与外界连通、且沿平行于所述安装孔的中心轴线的方向延伸。
  3. 根据权利要求2所述的顶盖组件，其中：
    所述连接件设置有与所述第一排出段连通的固定孔，所述固定孔内设置有感温元件。
  4. 根据权利要求1至3任一项所述的顶盖组件，其中：
    所述第二通道包括相互连通的第一泄压段和第二泄压段，所述第一泄压段还与所述顶盖远离所述连接件的一侧连通、且沿平行于所述安装孔的中心轴线的方向延伸，所述第二泄压段沿垂直于所述安装孔的中心轴线的方向延伸。
  5. 根据权利要求1至4任一项所述的顶盖组件，其中：
    还包括弹性件，所述弹性件的一端与所述安装孔远离所述顶盖的孔壁连接，所述弹性件的另一端与所述泄压阀连接。
  6. 根据权利要求1至5任一项所述的顶盖组件，其中：
    所述泄压阀包括相连的主体部和凸出部，所述安装孔包括沿轴向分布的第一孔壁面、台阶面和第二孔壁面，所述主体部与所述第一孔壁面滑动连接，所述凸出部与所述第二孔壁面滑动连接，所述台阶面用于限制所述凸出部的滑动位置。
  7. 根据权利要求1至6任一项所述的顶盖组件，其中：
    还包括极柱，所述顶盖上设置有极柱孔，所述通孔邻近所述极柱孔设置，所述极柱穿过所述极柱孔并与所述连接件铆接。
  8. 根据权利要求1至7任一项所述的顶盖组件，其中：
    还包括第一塑胶件，所述第一塑胶件设置在所述连接件与所述顶盖之间，且所述第一塑胶件设置有供所述极柱穿过的第一过孔和供所述泄压阀穿过的第二过孔。
  9. 根据权利要求1至8任一项所述的顶盖组件，其中：
    还包括第二塑胶件，所述第二塑胶件设置在所述顶盖远离所述连接件的一侧，且所述第二塑胶件设置有供所述极柱穿过的第三过孔和与所述通孔连通的第四过孔。
  10. 根据权利要求9所述的顶盖组件，其中：
    所述第四过孔内设置有第二气体渗透膜。
  11. 一种电池单体，其中，包括：
    壳体，具有内腔以及连通所述内腔的开口；
    电极组件，设置在所述内腔中；
    如权利要求1至10任一项所述的顶盖组件，所述顶盖组件的所述顶盖与所述壳体连接、并封闭所述开口。
  12. 一种电池，其中，包括：
    如权利要求11所述的电池单体。
  13. 一种用电装置，其中，包括：
    如权利要求12所述的电池。
PCT/CN2022/116727 2021-10-25 2022-09-02 顶盖组件、电池单体、电池及用电装置 WO2023071524A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22885415.4A EP4270612A1 (en) 2021-10-25 2022-09-02 Top cover assembly, battery cell, battery, and electric device
US18/446,365 US20230395929A1 (en) 2021-10-25 2023-08-08 Top cover assembly, battery cell, battery and electrical apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122577576.2 2021-10-25
CN202122577576.2U CN216980710U (zh) 2021-10-25 2021-10-25 顶盖组件、电池单体、电池及用电装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/446,365 Continuation US20230395929A1 (en) 2021-10-25 2023-08-08 Top cover assembly, battery cell, battery and electrical apparatus

Publications (1)

Publication Number Publication Date
WO2023071524A1 true WO2023071524A1 (zh) 2023-05-04

Family

ID=82344294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/116727 WO2023071524A1 (zh) 2021-10-25 2022-09-02 顶盖组件、电池单体、电池及用电装置

Country Status (4)

Country Link
US (1) US20230395929A1 (zh)
EP (1) EP4270612A1 (zh)
CN (1) CN216980710U (zh)
WO (1) WO2023071524A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116387714A (zh) * 2023-06-05 2023-07-04 厦门海辰储能科技股份有限公司 端盖组件、储能装置与用电设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN216980710U (zh) * 2021-10-25 2022-07-15 宁德时代新能源科技股份有限公司 顶盖组件、电池单体、电池及用电装置
CN115832549A (zh) * 2022-11-03 2023-03-21 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池、用电装置及电池处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208173680U (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
JP2019102190A (ja) * 2017-11-29 2019-06-24 トヨタ自動車株式会社 リリーフ弁付き電池
CN212810475U (zh) * 2020-08-03 2021-03-26 深圳市派顿电源有限公司 一种安全防爆铅酸蓄电池
CN216980710U (zh) * 2021-10-25 2022-07-15 宁德时代新能源科技股份有限公司 顶盖组件、电池单体、电池及用电装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019102190A (ja) * 2017-11-29 2019-06-24 トヨタ自動車株式会社 リリーフ弁付き電池
CN208173680U (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
CN212810475U (zh) * 2020-08-03 2021-03-26 深圳市派顿电源有限公司 一种安全防爆铅酸蓄电池
CN216980710U (zh) * 2021-10-25 2022-07-15 宁德时代新能源科技股份有限公司 顶盖组件、电池单体、电池及用电装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116387714A (zh) * 2023-06-05 2023-07-04 厦门海辰储能科技股份有限公司 端盖组件、储能装置与用电设备
CN116387714B (zh) * 2023-06-05 2023-08-25 厦门海辰储能科技股份有限公司 端盖组件、储能装置与用电设备

Also Published As

Publication number Publication date
US20230395929A1 (en) 2023-12-07
CN216980710U (zh) 2022-07-15
EP4270612A1 (en) 2023-11-01

Similar Documents

Publication Publication Date Title
WO2023071524A1 (zh) 顶盖组件、电池单体、电池及用电装置
CN214898799U (zh) 端盖组件、电池及用电装置
CN214254572U (zh) 电池单体、电池以及用电装置
WO2023045401A1 (zh) 注液孔密封装置、端盖组件、电池单体、电池以及用电设备
WO2022109884A1 (zh) 电池单体及其制造方法和系统、电池以及用电装置
WO2023165365A1 (zh) 自动排水阀、电池及用电装置
CN215988964U (zh) 电池单体、电池及用电设备
WO2022178679A1 (zh) 电池单体、电池、用电装置及制备电池单体的方法和装置
WO2022082387A1 (zh) 电池、用电装置、制备电池的方法和装置
WO2023221267A1 (zh) 端盖组件、电池单体、电池及用电装置
WO2024093026A1 (zh) 隔离板、隔离板组件、电池模组、电池包、用电装置
WO2023159507A1 (zh) 绝缘件、端盖组件、电池单体、电池及用电设备
WO2023133735A1 (zh) 电池、用电设备、制备电池的方法和设备
WO2023077268A1 (zh) 端盖组件、电池单体、电池及用电装置
WO2023245429A1 (zh) 电池单体、电池及用电装置
WO2023169197A1 (zh) 用于电池箱体的排水阀、电池、用电装置及排水方法
WO2023131204A1 (zh) 一种电池及用电装置
WO2023066024A1 (zh) 一种电芯及用电装置
CN218215490U (zh) 端盖组件、电池单体、电池及用电设备
WO2023024988A1 (zh) 电池及用电装置
US20230223641A1 (en) Box of battery, battery, power consumption apparatus, and method and apparatus for producing battery
WO2023159847A1 (zh) 电池单体、电池及用电装置
WO2023050236A1 (zh) 泄压机构、电池单体、电池、用电装置及其制造方法
WO2023019533A1 (zh) 电池单体、电池、用电装置以及制造电池单体的方法
WO2023246098A1 (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: 22885415

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022885415

Country of ref document: EP

Effective date: 20230723