WO2021184491A1 - 二次电池、电池模块以及使用二次电池作为电源的装置 - Google Patents

二次电池、电池模块以及使用二次电池作为电源的装置 Download PDF

Info

Publication number
WO2021184491A1
WO2021184491A1 PCT/CN2020/086978 CN2020086978W WO2021184491A1 WO 2021184491 A1 WO2021184491 A1 WO 2021184491A1 CN 2020086978 W CN2020086978 W CN 2020086978W WO 2021184491 A1 WO2021184491 A1 WO 2021184491A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
secondary battery
main body
tab
guide section
Prior art date
Application number
PCT/CN2020/086978
Other languages
English (en)
French (fr)
Inventor
许虎
Original Assignee
江苏时代新能源科技有限公司
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 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to CN202080002102.0A priority Critical patent/CN113748561B/zh
Priority to EP20917269.1A priority patent/EP3910724B1/en
Publication of WO2021184491A1 publication Critical patent/WO2021184491A1/zh
Priority to US17/547,273 priority patent/US11450931B2/en

Links

Images

Classifications

    • 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
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H01M50/529—Intercell connections through partitions, e.g. in a battery casing
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/53—Batteries
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Definitions

  • This application relates to the field of battery technology, in particular to a secondary battery, a battery module, and a device using the secondary battery as a power source.
  • the secondary battery forms a battery module by connecting a plurality of battery cells in series or in parallel to achieve a larger capacity or power.
  • the secondary battery is provided with an electrode assembly for generating electrical energy in the case.
  • the electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet. Both the positive electrode sheet and the negative electrode sheet include a coated area and an uncoated area. The coated area is wound or stacked to form the main body, and the uncoated area is stacked to form a tab. The tabs of the electrode assembly are connected to the electrode terminals through the current collecting member.
  • the current collecting member of the secondary battery is an integral structure and adopts a bent structure, so as to improve the reliability of welding and fixing with the tab by increasing its structural strength.
  • This application provides a secondary battery, a battery module, and a device using the secondary battery as a power source.
  • the secondary battery when the part of the connecting piece connected with the tab is bent, the stress applied to the guide section of the adapter sheet is small, which can reduce the deformation of the guide section toward the main body, and reduce the guide section's compression. Pressing at least part of the pole piece of the main body may cause the pole piece to peel off or drop powder.
  • the present application provides a secondary battery, which includes:
  • the adapter sheet and the connecting member are connected in a manner in which they are provided separately and assembled.
  • the adapter plates and connectors with different stiffnesses the adapter plates and the connectors can be separately processed and manufactured, and then the two can be connected and fixed to form a current collecting member. Since the connecting piece is more easily deformed relative to the guide section, when the tab connecting section and the tab are bent together with respect to the length direction, the external force transmitted to the guide section through the tab connecting section is relatively small, so During the bending process of the tab connecting section, the degree of deformation of the guide section toward the main body of the electrode assembly can be effectively reduced, and the amount of deformation of the guide section can be reduced.
  • the present application provides a battery module including the secondary battery of the above-mentioned embodiment.
  • the present application provides a device using a secondary battery as a power source, which includes the secondary battery of the above-mentioned embodiment.
  • Fig. 1 is a schematic structural diagram of a vehicle disclosed in an embodiment of the present application
  • FIG. 2 is a schematic diagram of an exploded structure of a battery pack disclosed in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a partial structure of a battery module disclosed in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an exploded structure of a secondary battery disclosed in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an exploded structure of a secondary battery disclosed in another embodiment of the present application.
  • FIG. 6 is a schematic diagram of an exploded structure of a current collecting component disclosed in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a connection state of a connecting piece and an adapter piece disclosed in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of an exploded structure of a connector disclosed in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an exploded structure of a current collecting component disclosed in another embodiment of the present application.
  • FIG. 10 is a schematic diagram of a connection state of a connector and an adapter plate disclosed in another embodiment of the present application.
  • FIG. 11 is a partial structural diagram of a connection state of a current collecting member and an electrode assembly disclosed in an embodiment of the present application;
  • FIG. 12 is a schematic diagram of an exploded structure of a current collecting component disclosed in another embodiment of the present application.
  • FIG. 13 is a schematic diagram of a connection state of a connecting piece and an adapter piece disclosed in another embodiment of the present application.
  • FIG. 14 is a partial structural diagram of a connection state of a current collecting member and an electrode assembly disclosed in another embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of an adapter sheet disclosed in another embodiment of the present application.
  • 16 is a schematic diagram of an exploded structure of a current collecting member and an insulating component disclosed in another embodiment of the present application;
  • FIG. 17 is a schematic top view of the structure of a secondary battery disclosed in an embodiment of the present application.
  • Fig. 18 is a schematic sectional view of the structure taken along A-A in Fig. 17;
  • Figure 19 is an enlarged view of B in Figure 18;
  • FIG. 20 is a schematic diagram of an exploded structure of a secondary battery disclosed in yet another embodiment of the present application.
  • Secondary battery 31. Housing; 32. Electrode assembly; 321. Main body; 322. Tabs;
  • Adapter piece 51. Terminal connection section; 52. Guide section; 52a. Legs; 520. Edge portion; 521. First area; 522. Second area;
  • X thickness direction
  • Y length direction
  • Z height direction
  • W axial direction
  • the embodiment of the present application provides a device that uses the secondary battery 30 as a power source.
  • the device can be, but is not limited to, a vehicle, a ship, or an aircraft.
  • an embodiment of the present application provides a vehicle 1 including a vehicle body and a battery module.
  • the battery module is installed in the vehicle body.
  • the vehicle 1 may be a pure electric vehicle, a hybrid electric vehicle or an extended-range vehicle.
  • the vehicle body is provided with a drive motor electrically connected to the battery module.
  • the battery module provides power to the drive motor.
  • the drive motor is connected to the wheels on the vehicle body through a transmission mechanism to drive the vehicle to travel.
  • the battery module may be horizontally arranged at the bottom of the vehicle body.
  • the battery module may be a battery pack 10.
  • the battery pack 10 includes a box body and a battery module 20 disposed in the box body.
  • the number of battery modules 20 is one or more.
  • One or more battery modules 20 are arranged side by side in the box.
  • the type of cabinet is not limited.
  • the box can be a frame-shaped box, a disk-shaped box, or a box-shaped box.
  • the box body includes a lower box body for accommodating the battery module 20 and an upper box body covered with the lower box body.
  • the upper box body and the lower box body are closed to form an accommodating portion for accommodating the battery module 20.
  • the battery module may also be the battery module 20, that is, the battery module 20 is directly arranged on the vehicle body.
  • the battery module 20 includes a plurality of secondary batteries 30.
  • the battery module 20 includes an accommodating part and a plurality of secondary batteries 30 located in the accommodating part.
  • a plurality of secondary batteries 30 are arranged side by side in the accommodating part.
  • the accommodating part includes a housing and a cover plate covering the housing; alternatively, the accommodating part includes side plates and end plates that are successively enclosed and connected; or, the accommodating part includes oppositely arranged two ends Plate and band around the end plate and the outside of the secondary battery 30
  • the applicant conducted research and analysis on the various structures of the secondary battery 30.
  • the applicant found that the active material coated on the pole pieces of the electrode assembly had peeling and powder falling, resulting in poor electrochemical performance and safety performance of the secondary battery 30.
  • the secondary battery 30 is in During the assembly process, the pole piece is subjected to external force, which leads to the phenomenon of filming and powder falling of the active material coated on the pole piece.
  • the secondary battery 30 of the embodiment of the present application includes a casing 31, an electrode assembly 32 provided in the casing 31, and a top cover assembly 40 sealedly connected to the casing 31.
  • the housing 31 in the embodiment of the present application has a square structure or other shapes.
  • the case 31 has an internal space accommodating the electrode assembly 32 and the electrolyte, and an opening communicating with the internal space.
  • the housing 31 may be made of materials such as aluminum, aluminum alloy, or plastic.
  • the electrode assembly 32 of the embodiment of the present application may be formed by stacking or winding the first pole piece, the second pole piece, and the separator between the first pole piece and the second pole piece together to form the main body portion 321, wherein the separator is An insulator between the first pole piece and the second pole piece.
  • the main body portion 321 of this embodiment has a flat structure as a whole.
  • the main body 321 has a wide surface and a narrow surface alternately arranged in the circumferential direction of the main body.
  • the thickness direction X of the secondary battery 30 refers to the direction perpendicular to the wide surface
  • the length direction Y refers to the winding of the main body portion 321 The parallel direction of the axis.
  • the thickness direction X and the length direction Y are perpendicular to the height direction Z, respectively.
  • the main body portion 321 is a laminated structure.
  • the thickness direction X of the secondary battery 30 refers to the stacking direction of the first pole piece, the separator, and the second pole piece
  • the length direction Y refers to the direction in which the tab 322 extends from the main body portion 321.
  • the thickness direction X and the length direction Y are perpendicular to the height direction Z, respectively.
  • the main body portion 321 has two end surfaces facing each other in the axial direction W of the main body portion 321.
  • the longitudinal direction Y of the secondary battery 30 is parallel to the axial direction W.
  • the height direction Z of the secondary battery 30 is perpendicular to the axial direction W of the main body portion 321.
  • the first pole piece is exemplarily described as the positive pole piece and the second pole piece is the negative pole piece.
  • the active material of the positive electrode sheet is coated on the coating area of the positive electrode sheet, and the active material of the negative electrode sheet is coated on the coating area of the negative electrode sheet.
  • a plurality of uncoated regions extending from the coated region of the main body portion 321 are stacked as tabs 322.
  • the electrode assembly 32 includes two tabs 322, namely, a positive tab and a negative tab.
  • the positive lug extends from the coating area of the positive plate
  • the negative lug extends from the coating area of the negative plate.
  • two opposite end surfaces of the main body portion 321 each extend with a tab 322.
  • the top cover assembly 40 of the embodiment of the present application includes a top cover plate 41 and electrode terminals 42.
  • the top cover plate 41 of the embodiment of the present application has an outer surface and an inner surface opposed to the height direction Z of the secondary battery 30, and electrode extraction holes extending in the height direction Z.
  • the top cover 41 can cover and close the opening of the housing 31 and is connected to the housing 31 in a sealed manner.
  • the electrode terminal 42 is arranged on the top cover plate 41 and arranged corresponding to the electrode lead-out hole. A part of the electrode terminal 42 is exposed on the outer surface of the top cover plate 41 and is used for welding with the bus bar.
  • the current collecting member of the integrally formed structure has a guiding section and a tab connecting section.
  • the integral structure refers to that the current collecting member is processed and manufactured as a whole, rather than the guiding section and the tab connecting section are formed by splicing each other.
  • the current collecting member of the integrally formed structure can be processed and manufactured by processing methods such as stamping, casting or forging.
  • the guide section and the tab connecting section are usually set to the same thickness.
  • the tab connecting section of the current collecting member will directly transmit the stress to the guiding section at the same time, thereby driving the guiding section towards the direction of the main body 321. It is deformed and can be pressed against the main body 321. In this way, the guide section will exert pressure on at least part of the pole pieces in the main body portion 321, which may easily cause the pole pieces coated with the active material to be subjected to mechanical force to cause detachment or powder drop, thereby affecting the electrochemistry of the secondary battery 30. Performance and safety performance.
  • the secondary battery 30 of the embodiment of the present application further includes a current collecting member.
  • the current collecting member includes an adapter piece 50 and a connecting piece 60.
  • the adapter piece 50 and the connecting piece 60 are provided separately and connected to each other, so that the adapter piece 50 and the connecting piece 60 are assembled together to form a current collecting member.
  • the connecting piece 60 and the adapter piece 50 are individually processed and manufactured, and then connected and fixed to each other through a mechanical connection.
  • the mechanical connection can be welding.
  • the connecting piece 50 and the connecting piece 60 are welded and connected to form a welded portion 300 (specifically as shown in FIG. 10).
  • the number of welding parts 300 may be two.
  • the mechanical connection can also be riveting or bonding.
  • a part of the electrode terminal 42 is located on the inner surface side of the top cover 41 and is connected to the adapter plate 50.
  • the adapter sheet 50 is disposed on the side of the top cover plate 41 close to the electrode assembly 32.
  • the adapter piece 50 is connected with the connecting piece 60.
  • the connecting member 60 is connected to the tab 322 of the electrode assembly 32.
  • the adapter piece 50 includes a terminal connection section 51 and a guide section 52.
  • the terminal connection section 51 and the guide section 52 are connected and arranged to intersect each other.
  • the terminal connection section 51 is electrically connected to the electrode terminal 42.
  • the electrode terminal 42 does not extend beyond the surface of the terminal connection section 51 away from the top cover plate 41, thereby reducing the possibility of the electrode terminal 42 contacting and pressing against the electrode assembly 32.
  • the guiding section 52 of the adapter piece 50 is connected with the connecting piece 60.
  • the connecting member 60 since the connecting member 60 is configured such that the rigidity of the connecting member 60 is less than the rigidity of the guiding section 52, the connecting member 60 is more prone to deformation than the adapter plate 50, so that the connecting member 60 and the pole When the connecting portion of the ear 322 is bent relative to the longitudinal direction Y, the deformation of the guide section 52 toward the main body portion 321 can be reduced.
  • stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to a force, and is a characterization of the ease of elastic deformation of a material or structure.
  • the connecting piece 60 includes a collecting section 61 and a tab connecting section 62.
  • the part of the connecting piece 60 connected with the guiding section 52 is the collecting section 61.
  • the part of the connecting piece 60 connected to the tab 322 is a tab connection section 62.
  • the connecting piece is connected to each other.
  • the section 62 exerts an external force to make the tab connecting section 62 in the erected state bend toward the surface of the guide section 52 away from the main body 321 with respect to the length direction Y, that is, the tab connecting section 62 is bent inward.
  • the tab connecting section 62 bent in place is laminated with the guiding section 52.
  • the connecting piece 60 and the adapter piece 50 are connected to each other, and the lug connecting section 62 of the connecting piece 60 is connected to the lug 322 at the same time, an external force is applied to the lug connecting section 62 to make it stand upright.
  • the lug connecting section 62 is bent in a direction away from the guide section 52 with respect to the length direction Y, that is, the lug connecting section 62 is bent toward the outside.
  • the tab connecting section 62 that is bent in place and the guiding section 52 are arranged correspondingly along the thickness direction X.
  • the bending angle of the tab connecting section 62 is 80° to 100°.
  • the connecting member 60 is more easily deformed relative to the guide section 52, when the tab connecting section 62 and the tab 322 are bent together with respect to the length direction Y, the external force is transmitted to the guide through the tab connecting section 62
  • the force on the guide section 52 is relatively small, so that during the bending process of the tab connecting section 62, the degree of deformation of the guide section 52 toward the main body portion 321 of the electrode assembly 32 can be effectively reduced, and the deformation of the guide section 52 can be reduced. quantity.
  • the adapter plate 50 and the connecting member 60 are connected in a manner of separately providing and assembling the two.
  • the adaptor piece 50 and the connector 60 can be manufactured separately, and then the two can be connected and fixed to form a current collecting member.
  • the current collecting member of the embodiment of the present application has low overall processing difficulty and low processing cost.
  • the guide section 52 with greater rigidity than the connecting member 60 produces a smaller amount of deformation toward the main body portion 321, which effectively reduces the contact between the guide section 52 and the main body portion 321 and applies at least part of the pole pieces in the main body portion 321.
  • the thickness H of the connecting member 60 is smaller than the thickness L of the guiding section 52 so that the rigidity of the connecting member 60 is smaller than that of the guiding section 52.
  • the connecting piece 60 and the guiding section 52 can be manufactured using the same material, which reduces the types of materials used and also facilitates the connection and fixation of the two by welding. After the thickness of the connecting piece 60 is reduced, the structure of the current collecting member formed by the connecting piece 60 and the adapter sheet 50 can be made more compact, so that the secondary battery 30 saves more internal space, which is beneficial to increase the battery energy density.
  • the connecting member 60 has a single-layer structure.
  • the stiffness of the connecting member 60 is less than the stiffness of the guiding section 52, so as to ensure that the stiffness of the connecting member 60 is less than the stiffness of the guiding section 52.
  • the connecting member 60 has a single-layer structure. The thickness H of the connecting piece 60 is equal to the thickness L of the guiding section 52, so that the connecting piece 60 can be guaranteed to have a good flow capacity even when the connecting piece 60 is easily deformed.
  • the connecting member 60 is treated by an annealing process, so as to reduce the hardness of the connecting member 60. Since the connecting member 60 of this embodiment can be separately processed and manufactured, the connecting member 60 can be individually annealed.
  • the current collecting member with an integrally formed structure in the prior art is difficult to anneal the tab connection part to achieve a separate reduction in the rigidity of the tab connection part.
  • the connecting member 60 and the guide section 52 can be manufactured using the same material, which reduces the types of materials used and also facilitates the connection and fixation of the two by welding.
  • the thickness H of the connecting member 60 is less than the thickness L of the guiding section 52 and the hardness of the connecting member 60 is less than the hardness of the guiding section 52, so as to ensure that the rigidity of the connecting member 60 is less than that of the guiding section 52.
  • the energy density of the electrode assembly 32 remains unchanged, the thickness of the connecting member 60 cannot be too small, otherwise the flow area of the connecting member 60 will be too small, and the flow capacity of the connecting member 60 will be affected.
  • the rigidity of the connecting member 60 can be reduced by the hardness of the connecting member 60.
  • the connecting member 60 includes two or more foils 60a stacked one above the other. Two or more foils 60a are laminated in the direction indicated by their own thickness.
  • the thickness of each layer of foil 60a is smaller than the thickness of the guide section 52, for example, the ratio of the thickness of each layer of foil 60a to the thickness of the guide section 52 ranges from 1/10 to 1/2.
  • the rigidity of each layer of foil 60 a is less than the rigidity of the guide section 52. In this way, compared to a single-layer tab connecting section 62 with the same thickness, the external force required to bend the tab connecting section 62 formed by more than two foils 60a is smaller, which is beneficial to further reduce the pole.
  • the external force carried by the ear connecting section 62 during the bending process reduces the amount of deformation of the guide section 52 in the direction close to the main body 321.
  • the connecting member 60 formed by stacking two or more foils 60a can reduce the rigidity of the connecting member 60, and at the same time, it also has a good flow capacity to meet the flow requirement.
  • the guiding section 52 of the adapter sheet 50 has two opposite edge portions 520 in the thickness direction X of the secondary battery 30.
  • the thickness direction X of the secondary battery 30 is perpendicular to the axial direction W of the main body portion 321.
  • the collecting section 61 is connected to the surface of the guiding section 52 away from the main body 321.
  • the collecting section 61 of the connecting member 60 is connected to the surface of the guiding section 52 away from the main body 321 in advance.
  • the tab 322 and the tab connecting section 62 are connected and fixed.
  • the tab 322 is connected to the surface of the tab connecting section 62 away from the main body portion 321.
  • the tab 322 and the tab connecting section 62 are bent toward the surface of the guide section 52 away from the main body 321. After the tab connecting section 62 is bent in place, the tab 322 is flattened.
  • the connecting member 60 further includes a bending section 63.
  • the bending section 63 connects the collecting section 61 and the tab connecting section 62. After the tab connecting section 62 is bent, the bending section 63 is arranged around the guide section 52. When an external force is applied to the lug connecting section 62 to bend the lug connecting section 62, the connecting piece 60 will bend at the bending section 63, so that after the bending section 63 is set, the connecting piece 60 can be effectively guided in the bending
  • the bending of the section 63 is beneficial to accurately control the bending position of the connecting member 60, and reduces the possibility that the bent portion of the tab connecting section 62 is not in the predetermined position during the bending process.
  • the collecting section 61 is arranged inside the guiding section 52.
  • the inner side of the guide section 52 refers to the side of the guide section 52 close to the main body portion 321.
  • the position of the collecting section 61 is located between the guiding section 52 and the main body 321. At least part of the tab connecting section 62 is bent on a side of the guiding section 52 away from the main body portion 321.
  • the tab 322 is connected to the surface of the tab connection section 62 away from the guide section 52.
  • the tab connecting section 62 bypasses the edge 520 of the guide section 52 and then bends toward the surface of the guide section 52 away from the main body 321.
  • the edge portion 520 of the guiding section 52 can form a restraining position on the bending section 63, so as to facilitate the bending of the bending section 63 along the contour of the edge portion 520.
  • the arc length of the bending area corresponding to the edge portion 520 on the bent section 63 after bending is smaller, which also makes the gap between the bent section 63 and the edge portion 520 smaller.
  • both the tab connecting section 62 and the bending section 63 occupy less space in the length direction Y, which is beneficial to increase the energy density of the secondary battery 30; on the other hand, due to the corresponding bending section 63
  • the arc length is small, so that the bending section 63 is not prone to compressive deformation when it is squeezed by external force, thereby reducing the possibility of structural damage such as cracks or breaks in the stress concentration area due to the stress concentration area of the bending section 63 .
  • the outer surface of the edge portion 520 of the guiding section 52 is arc-shaped, which reduces the local large stress generated on the bending section 63, which results in a stress concentration area in the bending section 63.
  • the bending section 63 is in contact with the edge portion 520 of the guide section 52, so on the one hand, the gap between the bending section 63 and the edge portion 520 is small, so that the bending section 63 itself is folded
  • the arc length of the bending area is small and the space occupied is small, which is beneficial to increase the energy density of the secondary battery 30; on the other hand, the part of the tab connecting section 62 close to the bending section 63 and the guide section 52 are far away from the main body.
  • the gap between the surfaces of 321 is small.
  • the entire bending section 63 is in contact with the edge portion 520 of the guiding section 52.
  • the bending section 63 has two boundaries 63 a, one of the boundaries 63 a is close to the collecting section 61, and the other boundary 63 a is close to the tab connecting section 62.
  • the boundary 63a close to the collecting section 61 is located inside the surface of the guiding section 52 close to the main body portion 321 or close to the boundary 63a of the collecting section 61 and the edge portion 520 of the guiding section 52 away from the edge of the main body portion 321 Aligned.
  • the boundary 63a close to the tab connecting section 62 is located outside of the surface of the guiding section 52 away from the main body portion 321 or close to the boundary 63a of the tab connecting section 62 and the edge portion 520 of the guiding section 52 away from the main body.
  • the edges of 321 are aligned.
  • the boundary 63a may be an indentation provided on the connecting member 60.
  • the connecting member 60 includes a collecting section 61 and a tab connecting section 62. After the collecting section 61 and the guide section 52 are connected and fixed and the tab 322 is connected and fixed with the tab connection section 62, the tab 322 and the tab connection section 62 are bent together toward the surface of the guide section 52 away from the main body 321 .
  • the number of electrode assemblies 32 may be one or more than two. Two or more electrode assemblies 32 are arranged side by side along the thickness direction X. The wide surface of one of the two adjacent electrode assemblies 32 corresponds to the wide surface of the other.
  • the connecting member 60 includes two tab connecting sections 62.
  • the current collecting section 61 is provided with a tab connecting section 62 on opposite sides along the thickness direction X of the secondary battery 30 respectively.
  • a collecting section 61 is arranged between the two tab connecting sections 62.
  • the collecting section 61 is connected and fixed to the guiding section 52.
  • the number of electrode assemblies 32 is two, of which the tab 322 of one electrode assembly 32 is connected and fixed to the corresponding tab connection section 62, and the tab 322 of the other electrode assembly 32 is connected to the corresponding tab connection section 62.
  • 62 is connected and fixed. Then, each tab connecting section 62 is bent toward the surface of the guide section 52 away from the main body portion 321. In this way, the tabs 322 of the two electrode assemblies 32 are respectively connected to the corresponding tab connection section 62, so that the difficulty of connecting the tabs 322 and the tab connection section 62 can be reduced.
  • the guide section 52 has a recess 100.
  • the concave portion 100 is recessed from the surface of the guide section 52 away from the main body portion 321 toward the direction close to the main body portion 321. At least part of the current collecting section 61 is accommodated in the recess 100, so that in the length direction Y of the secondary battery 30, the overall size of the current collecting section 61 and the guide section 52 after being superimposed on each other is small.
  • the guide section 52 has a recess 100.
  • the concave portion 100 is recessed from the surface of the guide section 52 toward the main body portion 321 in a direction away from the main body portion 321.
  • At least part of the current collecting section 61 is accommodated in the recess 100, so that in the length direction Y of the secondary battery 30, the overall size of the current collecting section 61 and the guide section 52 after being superimposed on each other is small.
  • improving the compactness of the current collecting section 61 and the guiding section 52 is conducive to saving space and increasing the energy density of the secondary battery 30; on the other hand, it is conducive to increasing the current collecting section 61 and the main body 321.
  • the guiding section 52 and the collecting section 61 are deformed toward the main body portion 321 together to cause the set It is possible that the flow section 61 comes into contact with the main body portion 321 and exerts a compressive stress on at least part of the pole pieces of the main body portion 321.
  • the surface of the guide section 52 facing the main body portion 321 is flush with the surface of the collecting section 61 facing the main body portion 321, so that the collecting section 61 is entirely contained in the recess 100 of the guiding section 52, which is beneficial to The distance between the collecting section 61 and the end surface of the main body portion 321 is further increased.
  • the secondary battery 30 further includes an insulating member 70.
  • the insulating member 70 is disposed between the guide section 52 and the main body portion 321.
  • the insulating member 70 covers at least a part of the connection area between the current collecting section 61 and the guide section 52, that is, in the length direction X, at least a part of the current collecting section 61 is covered by the insulating member 70.
  • the insulating member 70 covers the entire collecting section 61 so as to cover the connection area of the collecting section 61 and the guiding section 52.
  • the insulating member 70 isolates the current collecting section 61 and the main body portion 321.
  • the insulating member 70 has a sheet structure.
  • the insulating member 70 may be bonded to the collecting section 61 and/or the guiding section 52.
  • the insulating member 70 is contained in the recess 100 of the guide section 52, which is beneficial to improve the compactness of the structure and reduce the length of the insulating member 70, the current collecting section 61 and the guide section 52 in the secondary battery 30.
  • the overall size superimposed on each other in the direction Y is beneficial to save space and increase the energy density of the secondary battery 30.
  • the guiding section 52 includes a first area 521 and a second area 522 recessed in a direction away from the main body portion 321 relative to the first area 521.
  • the first area 521 and the second area 522 are arranged in a direction away from the top cover 41.
  • the collecting section 61 is connected to the first area 521.
  • the guide section 52 has a vacant space 200 corresponding to the second area 522.
  • a support tool is inserted into the relief space 200 to provide the guide section 52 with a supporting force away from the main body portion 321 through the second area 522, which is conducive to further The amount of deformation of the guide section 52 toward the main body portion 321 is reduced.
  • the provision of the space 200 is beneficial to improve the convenience of inserting the support tool, and also reduces the contact between the support tool and the main body 321 due to the small distance between the guide section 52 and the main body 321 during the insertion process, thereby The possibility that the support tool touches the pole piece and causes structural damage to the pole piece.
  • the surface of the second area 522 away from the main body portion 321 protrudes from the surface of the tab 322 away from the tab connecting section 62.
  • the guide section 52 includes two legs 52a.
  • the two legs 52 a are arranged at intervals along the thickness direction X of the secondary battery 30. There is a gap between the two legs 52a.
  • a connecting member 60 is provided on each leg 52a.
  • the leg 52a For one of the legs 52a, after the lug connecting section 62 of the connecting piece 60 is connected to the corresponding lug 322, in the process of bending the lug connecting section 62 or flattening the lug 322, the leg 52a generates an impact on the other leg 52a. Less stress interference, and the deformation of the foot 52a is not easy to drive the other foot 52a to produce the same deformation, which is beneficial to further reduce the deformation of the guide section 52 toward the main body 321 as a whole.
  • the material of the transition piece 50 is copper, copper alloy, aluminum or aluminum alloy.
  • the material of the connecting member 60 is copper, copper alloy, aluminum or aluminum alloy.
  • the secondary battery 30 of the embodiment of the present application includes an adapter sheet 50 and a connecting member 60 that are separately provided.
  • the connecting member 60 is an intermediate transitional connecting part, and is used to connect the guide section 52 and the tab 322 of the electrode assembly 32.
  • the connecting piece 60 includes a collecting section 61 and a tab connecting section 62.
  • the collecting section 61 is connected and fixed to the guiding section 52.
  • the tab connecting section 62 is connected and fixed to the tab 322 of the electrode assembly 32.
  • the rigidity of the connecting piece 60 is less than the rigidity of the guiding section 52, so the connecting piece 60 is more easily deformed relative to the guiding section 52.
  • the deformation of the guide section 52 toward the main body portion 321 of the electrode assembly 32 is beneficial to reduce the possibility that the pole piece coated with the active material is subjected to the pressure from the guide section 52 to cause film or powder drop. In this way, the electrochemical performance and safety performance of the secondary battery 30 are improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种二次电池、电池模块以及使用二次电池作为电源的装置。二次电池包括：壳体；电极组件，设于壳体内，其包括主体部和极耳；顶盖组件，包括连接于壳体的顶盖板和设于顶盖板的电极端子；集流构件，包括转接片和连接件，连接件与转接片分开提供并相互连接，转接片与电极端子连接，转接片包括导引段，导引段位于主体部沿二次电池的长度方向一侧且沿垂直长度方向的方向延伸；连接件包括用于连接导引段的集流段和用于连接极耳的极耳连接段，集流段设于导引段和主体部之间，连接件的刚度小于导引段的刚度，以使连接件与极耳连接的部分相对于长度方向折弯时，能减小导引段朝主体部的变形，降低导引段挤压极片而导致极片脱膜或掉粉的可能性。

Description

二次电池、电池模块以及使用二次电池作为电源的装置
相关申请的交叉引用
本申请要求享有于2020年03月18日提交的名称为“二次电池、电池模块以及使用二次电池作为电源的装置”的中国专利申请202010189392.6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，特别是涉及一种二次电池、电池模块以及使用二次电池作为电源的装置。
背景技术
随着社会和科学技术的发展，二次电池被广泛地应用于为高功率的装置提供动力，例如电动车辆等。二次电池通过将多个电池单元串联或并联连接形成电池模块，以实现较大的容量或功率。
二次电池在壳体内设有用于产生电能的电极组件。电极组件包括正极片、隔膜和负极片。正极片和负极片均包括涂覆区和未涂覆区。涂覆区通过卷绕或者堆叠的方式形成主体部，未涂覆区层叠形成极耳。电极组件的极耳通过集流构件与电极端子连接。
在发明人所知晓的相关技术中，二次电池的集流构件为一体式结构且采用弯折结构，以便通过增加自身结构强度提高与极耳焊接固定的可靠性。
然而，上述二次电池在实际使用的过程中，发现采用一体式结构的集流构件与极耳直接连接后，会存在电化学性能及安全性能较差的问题。
发明内容
本申请提供一种二次电池、电池模块以及使用二次电池作为电源的装 置。二次电池中，连接件上与极耳连接的部分折弯时，对转接片的导引段施加的应力较小，能够减小导引段朝向主体部的变形量，降低导引段挤压主体部的至少部分极片而导致极片发生脱膜或掉粉的可能性。
一方面，本申请提供一种二次电池，其包括：
壳体；电极组件，设置于壳体内，电极组件包括主体部以及从主体部延伸出的极耳；顶盖组件，包括顶盖板和设置于顶盖板上的电极端子，顶盖板连接于壳体；集流构件，包括转接片和连接件，连接件与转接片分开提供并且相互连接，转接片与电极端子相连接，转接片包括导引段，导引段位于主体部沿二次电池的长度方向的一侧，并且导引段沿垂直长度方向的方向延伸；其中，连接件包括用于连接导引段的集流段和用于连接极耳的极耳连接段，集流段设于导引段和主体部之间，连接件被配置为：连接件自身刚度小于导引段的刚度，以使得连接件与极耳连接的部分相对于二次电池的长度方向折弯时，能够减小导引段朝主体部的变形。
根据本申请实施例的二次电池，转接片和连接件采用分开提供并将两者组装的连接方式。针对刚度不同的转接片和连接件，转接片和连接件各自可以单独加工制造，然后再将两者连接固定以形成集流构件。由于连接件相对于导引段更加易于变形，因此在极耳连接段与极耳相对于长度方向一同折弯时，外力通过极耳连接段传递至导引段上的作用力相对较小，从而在极耳连接段折弯过程中，可以有效降低导引段朝电极组件的主体部的变形程度，减小导引段的变形量。这样，有效降低导引段与主体部接触并对主体部中的至少部分极片施加压力的可能性，进而降低涂覆有活性物质的极片受到来自主体部的挤压力而发生脱膜或掉粉的可能性，以此提高二次电池的电化学性能及安全性能。
另一方面，本申请提供一种电池模块，其包括上述实施例的二次电池。
再一方面，本申请提供一种使用二次电池作为电源的装置，其包括上述实施例的二次电池。
附图说明
下面将通过参考附图来描述本申请示例性实施例的特征、优点和技术效果。
图1是本申请一实施例公开的一种车辆的结构示意图；
图2是本申请一实施例公开的一种电池组的分解结构示意图；
图3是本申请一实施例公开的一种电池模组的局部结构示意图；
图4是本申请一实施例公开的一种二次电池的分解结构示意图；
图5是本申请另一实施例公开的一种二次电池的分解结构示意图；
图6是本申请一实施例公开的一种集流构件的分解结构示意图；
图7是本申请一实施例公开的一种连接件和转接片连接状态的示意图；
图8是本申请一实施例公开的一种连接件的分解结构示意图；
图9是本申请又一实施例公开的一种集流构件的分解结构示意图；
图10是本申请又一实施例公开的一种连接件和转接片连接状态的示意图；
图11是本申请一实施例公开的一种集流构件与电极组件连接状态的局部结构示意图；
图12是本申请另一实施例公开的一种集流构件的分解结构示意图；
图13是本申请另一实施例公开的一种连接件和转接片连接状态的示意图；
图14是本申请另一实施例公开的一种集流构件与电极组件连接状态的局部结构示意图；
图15是本申请又一实施例公开的一种转接片的结构示意图；
图16是本申请又一实施例公开的一种集流构件和绝缘部件的分解结构示意图；
图17是本申请一实施例公开的一种二次电池的俯视结构示意图；
图18是图17中沿A-A的剖视结构示意图；
图19是图18中的B处放大图；
图20是本申请再一实施例公开的一种二次电池的分解结构示意图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
1、车辆；
10、电池组；
20、电池模组；
30、二次电池；31、壳体；32、电极组件；321、主体部；322、极耳；
40、顶盖组件；41、顶盖板；42、电极端子；
50、转接片；51、端子连接段；52、导引段；52a、支脚；520、边缘部；521、第一区域；522、第二区域；
60、连接件；60a、箔片；61、集流段；62、极耳连接段；63、折弯段；63a、边界；
70、绝缘部件；
100、凹部；
200、让位空间；
300、焊接部；
X、厚度方向；Y、长度方向；Z、高度方向；W、轴向。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元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的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的 规定和限定，术语“安装”、“相连”、“连接”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。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
为了更好地理解本申请，下面结合图1至图20对本申请实施例进行描述。
本申请实施例提供一种使用二次电池30作为电源的装置。该装置可以但不仅限于为车辆、船舶或飞行器等。参见图1所示，本申请的一个实施例提供一种车辆1，其包括车辆主体和电池模块。电池模块设置于车辆主体。其中，车辆1可以是纯电动汽车，也可以是混合动力汽车或增程式汽车。车辆主体设置有与电池模块电连接的驱动电机。电池模块向驱动电机提供电能。驱动电机通过传动机构与车辆主体上的车轮连接，从而驱动汽车行进。可选地，电池模块可水平设置于车辆主体的底部。
参见图2所示，电池模块可以是电池组10。电池组10的设置方式有多种。在一些可选的实施例中，电池组10包括箱体和设置于箱体内的电池模组20。电池模组20的数量为一个或多个。一个或多个电池模组20排列布置于箱体内。箱体的类型不受限制。箱体可为框状箱体、盘状箱体或盒状箱体等。可选地，箱体包括用于容纳电池模组20的下箱体和与下箱体盖合的上箱体。上箱体和下箱体盖合后形成容纳电池模组20的容纳部。可以理解地，电池模块也可以是电池模组20，即将电池模组20直接设置于车辆主体上。
参见图3所示，电池模组20包括多个二次电池30。电池模组20的设置方式有多种。在一个实施例中，电池模组20包括容纳部和位于容纳部内的多个二次电池30。多个二次电池30在容纳部内并排设置。容纳部的设置方式有多种，例如容纳部包括外壳和盖设于外壳处的盖板；或者，容纳部包括相继围合连接的侧板和端板；或者，容纳部包括相对设置的两端板及环绕于端板和二次电池30外的箍带
申请人在注意到现有二次电池30存在电化学性能和安全性能较差的问题之后，对二次电池30的各个结构进行研究分析。最终，申请人发现 电极组件的极片上涂覆的活性物质存在脱膜和掉粉现象，从而导致二次电池30存在电化学性能和安全性能较差，同时也通过实际验证是二次电池30在装配过程中使极片受到外力作用而导致出现极片上涂覆的活性物质存在脱膜和掉粉现象。
参见图4和图5所示，本申请实施例的二次电池30包括壳体31、设置于壳体31内的电极组件32以及与壳体31密封连接的顶盖组件40。
本申请实施例的壳体31为方形结构或其他形状。壳体31具有容纳电极组件32和电解液的内部空间以及与内部空间相连通的开口。壳体31可以由例如铝、铝合金或塑料等材料制造。
本申请实施例的电极组件32可通过将第一极片、第二极片以及位于第一极片和第二极片之间的隔膜一同堆叠或卷绕而形成主体部321，其中，隔膜是介于第一极片和第二极片之间的绝缘体。本实施例的主体部321整体为扁平状结构。主体部321具有沿自身周向交替设置的宽面和窄面。本申请实施例中，在主体部321是卷绕结构的实施例中，二次电池30的厚度方向X指的是垂直于宽面的方向，而长度方向Y指的是主体部321的卷绕轴的平行方向。厚度方向X和长度方向Y分别与高度方向Z垂直。在主体部321是叠片结构的实施例中。二次电池30的厚度方向X指的是第一极片、隔膜和第二极片的堆叠方向，而长度方向Y指的是极耳322从主体部321延伸出的方向。厚度方向X和长度方向Y分别与高度方向Z垂直。主体部321具有沿自身轴向W相对的两个端面。二次电池30的长度方向Y与轴向W平行。二次电池30的高度方向Z与主体部321的轴向W相垂直。在本实施例中，示例性地以第一极片为正极片，第二极片为负极片进行说明。正极片活性物质被涂覆在正极片的涂覆区上，而负极片活性物质被涂覆到负极片的涂覆区上。由主体部321的涂覆区延伸出的多个未涂覆区层叠作为极耳322。电极组件32包括两个极耳322，即正极耳和负极耳。正极耳从正极片的涂覆区延伸出，而负极耳从负极片的涂覆区延伸出。本申请实施例中，主体部321相对的两个端面上各自延伸出一个极耳322。
本申请实施例的顶盖组件40包括顶盖板41以及电极端子42。本申请 实施例的顶盖板41具有沿二次电池30的高度方向Z相对的外表面和内表面以及沿高度方向Z延伸的电极引出孔。顶盖板41可以盖闭壳体31的开口并与壳体31密封连接。电极端子42设置于顶盖板41并与电极引出孔相对应设置。电极端子42的一部分露出于顶盖板41的外表面，并用于与汇流片焊接。
现有技术中，一体成型结构的集流构件具有导引段和极耳连接段。一体成型结构指的是集流构件整体被加工制造，而不是导引段和极耳连接段相互拼接形成。例如一体成型结构的集流构件可以通过冲压、铸造或者锻造等加工方式加工制造。为了便于制造，通常会将导引段和极耳连接段设置为相同的厚度。通过对二次电池30的装配过程进行分析，在将极耳322连同一体成型结构的集流构件的极耳连接段相对于长度方向Y折弯的过程中，首先需要通过滚轮在极耳322外侧施力以使极耳连接段逐渐向导引段远离主体部321的表面折弯。在极耳连接段大致折弯到位后，再通过平板结构将极耳322压平。然而，由于集流构件为一体成型结构，且极耳连接段与导引段的厚度相同，从而极耳连接段的刚度与导引段的刚度相同。这样，在通过向极耳连接段和极耳322施加压力时，集流构件的极耳连接段会同时将应力直接传递至导引段，以此带动导引段朝靠近主体部321的方向产生变形并能够压向主体部321。这样，导引段会对主体部321中的至少部分极片施加压力，从而容易导致涂覆有活性物质的极片受到机械力而发生脱膜或掉粉，进而影响二次电池30的电化学性能及安全性能。
基于申请人发现的上述问题，申请人对二次电池的结构进行改进，下面对本申请实施例进行进一步描述。
参见图5和图6所示，本申请实施例的二次电池30还包括集流构件。集流构件包括转接片50和连接件60。转接片50与连接件60分开提供并且相互连接，以使转接片50和连接件60共同组装形成集流构件。连接件60与转接片50为各自单独加工制造，然后通过机械连接的方式彼此连接固定。机械连接方式可以是焊接。转接片50和连接件60焊接连接后形成焊接部300(具体如图10所示)。焊接部300的数量可以是两个。机械连接方式也可以是铆接或粘接。电极端子42的一部分位于顶盖板41的 内表面一侧并与转接片50相连接。在一个实施例中，转接片50设置于顶盖板41靠近电极组件32的一侧。转接片50与连接件60相连接。连接件60与电极组件32的极耳322相连接。在一个示例中，转接片50包括端子连接段51和导引段52。端子连接段51与导引段52相连接并且彼此相交设置。端子连接段51与电极端子42电连接。电极端子42延伸不超出端子连接段51远离顶盖板41的表面，从而降低电极端子42接触并挤压到电极组件32的可能性。转接片50的导引段52与连接件60相连接。
本申请实施例中，由于连接件60被配置为：连接件60自身刚度小于导引段52的刚度，因此相对于转接片50，连接件60更加易于发生变形，从而使得连接件60与极耳322连接的部分相对长度方向Y折弯时，能够减小导引段52朝主体部321的变形。这里，刚度是指材料或结构在受力时抵抗弹性变形的能力，是材料或结构弹性变形难易程度的表征。连接件60包括集流段61和极耳连接段62。连接件60上与导引段52相连接的部分为集流段61。连接件60上与极耳322连接的部分为极耳连接段62。在一个示例中，参见图5、图6和图7所示，在连接件60和转接片50彼此连接，同时连接件60的极耳连接段62与极耳322连接之后，对极耳连接段62施加外力作用，以使处于竖立状态的极耳连接段62相对长度方向Y朝向导引段52远离主体部321的表面折弯，也即极耳连接段62朝内侧折弯。折弯到位的极耳连接段62与导引段52层叠。在另一个示例中，在连接件60和转接片50彼此连接，同时连接件60的极耳连接段62与极耳322连接之后，对极耳连接段62施加外力作用，以使处于竖立状态的极耳连接段62相对长度方向Y朝向远离导引段52的方向折弯，也即极耳连接段62朝外侧折弯。折弯到位的极耳连接段62与导引段52沿厚度方向X对应设置。可选地，极耳连接段62折弯角度为80°至100°。本申请实施例中，由于连接件60相对于导引段52更加易于变形，因此在极耳连接段62与极耳322相对长度方向Y一同折弯时，外力通过极耳连接段62传递至导引段52上的作用力相对较小，从而在极耳连接段62折弯过程中，可以有效降低导引段52朝电极组件32的主体部321的变形程度，减小导引段52的变形量。
本申请实施例中，转接片50和连接件60采用分开提供并将两者组装的连接方式。针对刚度不同的转接片50和连接件60，转接片50和连接件60可以单独加工制造，然后再将两者连接固定以形成集流构件。相对于在一体成型结构的集流构件上同时实现两种刚度不同区域的加工方式，本申请实施例的集流构件整体加工难度低，加工成本低。由于在极耳连接段62和极耳322一同折弯的过程中以及折弯到位后压平极耳322过程中，外力通过极耳连接段62传递至导引段52的作用力相对较小，因此刚度大于连接件60的导引段52朝靠近主体部321的方向产生的变形量会较小，从而有效降低导引段52与主体部321接触并对主体部321中的至少部分极片施加压力的可能性，进而降低涂覆有活性物质的极片受到来自主体部321的挤压力而发生脱膜或掉粉的可能性，以此提高二次电池30的电化学性能及安全性能。
在一个实施例中，连接件60的厚度H小于导引段52的厚度L，以使连接件60的刚度小于导引段52。连接件60和导引段52可以使用相同材料加工制造，减少加工材料使用类型，也有利于两者通过焊接方式连接固定。连接件60的厚度减小后，可以使得连接件60和转接片50形成的集流构件的结构更加紧凑，从而使得二次电池30节省出更多的内部空间，有利于提高电池能量密度。在一个示例中，连接件60为单层结构。
在另一个实施例中，连接件60的硬度小于导引段52的硬度，从而保证连接件60的刚度小于导引段52的刚度。在一个示例中，连接件60为单层结构。连接件60的厚度H等于导引段52的厚度L，从而可以在连接件60易于变形的情况下也能够保证连接件60具有良好的过流能力。在一个示例中，连接件60经退火工艺处理，从而降低连接件60的硬度。由于本实施例的连接件60可以单独加工制造，因此可以单独对连接件60进行退火处理。现有技术中的一体成型结构的集流构件，难于对极耳连接部进行退火处理而实现单独减小极耳连接部的刚度。可选地，连接件60和导引段52可以使用相同材料加工制造，减少加工材料使用类型，也有利于两者通过焊接方式连接固定。
在另一个实施例中，连接件60的厚度H小于导引段52的厚度L并且 连接件60的硬度小于导引段52的硬度，从而保证连接件60的刚度小于导引段52。在电极组件32的能量密度不变的情况下，连接件60的厚度不能过小，否则会使连接件60的过流面积过小，影响连接件60的过流能力。本实施例中，在保证连接件60的厚度具有满足过流面积要求的前提下，可以通过连接件60的硬度来降低连接件60的刚度。
在一个实施例中，参见图7和图8所示，连接件60包括两个以上层叠设置的箔片60a。两个以上的箔片60a沿自身厚度所指的方向层叠。每层箔片60a的厚度小于导引段52的厚度，例如每层箔片60a的厚度与导引段52的厚度之间的比值范围为1/10至1/2。每层箔片60a的刚度小于导引段52的刚度。这样，相对于相同厚度下的单层的极耳连接段62，对两个以上的箔片60a所形成的极耳连接段62进行折弯时所需的外力较小，从而有利于进一步降低极耳连接段62折弯过程中所承载的外力，减小导引段52朝靠近主体部321的方向产生的变形量。两个以上的箔片60a层叠形成的连接件60可以在降低连接件60自身刚度的同时，也具有良好的过流能力以能够满足过流要求。
在一个实施例中，参见图9、图10和图11所示，转接片50的导引段52在二次电池30的厚度方向X上具有两个相对的边缘部520。二次电池30的厚度方向X与主体部321的轴向W相垂直。集流段61连接于导引段52远离主体部321的表面。预先将连接件60的集流段61连接于导引段52远离主体部321的表面。再将极耳322与极耳连接段62连接固定。极耳322连接于极耳连接段62远离主体部321的表面。然后将极耳322与极耳连接段62一同朝导引段52远离主体部321的表面折弯。在极耳连接段62折弯到位后，对极耳322进行压平操作。
在一个实施例中，参见图6所示，连接件60还包括折弯段63。折弯段63连接集流段61和极耳连接段62。极耳连接段62折弯后，折弯段63绕过导引段52设置。在对极耳连接段62施加外力而使极耳连接段62折弯时，连接件60会在折弯段63发生折弯，从而设置折弯段63后，可以有效引导连接件60在折弯段63区域折弯，有利于精准控制连接件60的折弯部位，降低极耳连接段62在折弯过程中出现折弯的部位未在预定位 置的可能性。
参见图11所示，集流段61连接于导引段52远离主体部321的表面的实施例中，由于极耳连接段62在折弯时，极耳连接段62折弯区域不受导引段52的约束限位，从而在极耳连接段62折弯后，折弯段63所对应的折痕线长度会较大。同时折弯后的极耳连接段62在自身弹性变形力的作用下，极耳连接段62上的部分区域会朝远离主体部321的方向翘起。这样，一方面，极耳连接段62会在长度方向Y上占用过多空间，另一方面，由于折弯段63的折痕线长度较大，使得该折弯段63容易受到外力挤压而发生扁平化变形，从而导致折弯段63区域易于出现应力集中区并在应力集中区出现裂纹或折断等结构性损坏的情况。在一个实施例中，参见图12至图14所示，集流段61设置于导引段52的内侧。导引段52的内侧指的是导引段52靠近主体部321的一侧。集流段61的位置位于导引段52和主体部321之间。至少部分极耳连接段62折弯于导引段52远离主体部321的一侧。极耳322连接于极耳连接段62远离导引段52的表面。极耳连接段62绕过导引段52的边缘部520再朝导引段52上远离主体部321的表面折弯。在极耳连接段62折弯过程中，导引段52的边缘部520可以对折弯段63形成约束限位，便于折弯段63沿着边缘部520的轮廓折弯。折弯后的折弯段63上与边缘部520相对应的折弯区域的弧长长度较小，也使得折弯段63与边缘部520之间的间隙更小。这样，一方面，极耳连接段62和折弯段63均在长度方向Y上占用较少的空间，有利于提高二次电池30的能量密度；另一方面，由于折弯段63所对应的弧长长度较小，使得该折弯段63受到外力挤压时也不易发生压缩变形，从而降低因折弯段63出现应力集中区并在应力集中区出现裂纹或折断等结构性损坏的可能性。在一个示例中，导引段52的边缘部520的外表面呈弧形，降低对折弯段63的局部产生较大应力而导致折弯段63出现应力集中区域。
在一个实施例中，至少部分折弯段63与导引段52的边缘部520接触，从而一方面，折弯段63与边缘部520之间的间隙较小，使得折弯段63自身的折弯区域的弧长长度较小，占用空间较小，有利于提高二次电池30的能量密度；另一方面，极耳连接段62上靠近折弯段63的部分与导引 段52远离主体部321的表面之间间隙较小。优选地，整个折弯段63与导引段52的边缘部520接触。在一个示例中，折弯段63具有两个边界63a，其中一个边界63a靠近集流段61，另一个边界63a靠近极耳连接段62。在一个示例中，靠近集流段61的边界63a位于导引段52靠近主体部321的表面的内侧或靠近集流段61的边界63a与导引段52的边缘部520远离主体部321的边缘对齐。在另一个示例中，靠近极耳连接段62的边界63a位于导引段52远离主体部321的表面的外侧或靠近极耳连接段62的边界63a与导引段52的边缘部520远离主体部321的边缘对齐。可选地，边界63a可以是设置于连接件60上的压痕。
在一个实施例中，参见图5和图6所示，连接件60包括集流段61和一个极耳连接段62。在集流段61与导引段52连接固定并且极耳322与极耳连接段62连接固定后，将极耳322和极耳连接段62一同朝导引段52远离主体部321的表面折弯。电极组件32的数量可以是一个或者两个以上。两个以上的电极组件32沿厚度方向X并排设置。相邻两个电极组件32中一者的宽面与另一者的宽面相对应。在另一个实施例中，参见图5和图12所示，连接件60包括两个极耳连接段62。集流段61沿二次电池30的厚度方向X的相对两侧各自设置一个极耳连接段62。两个极耳连接段62之间设置集流段61。集流段61与导引段52连接固定。在一个示例中，电极组件32的数量为两个，其中一个电极组件32的极耳322与对应的极耳连接段62连接固定，另一个电极组件32的极耳322与对应的极耳连接段62连接固定。然后将各个极耳连接段62朝导引段52远离主体部321的表面折弯。这样，两个电极组件32的极耳322各自与对应的极耳连接段62连接，从而可以降低极耳322和极耳连接段62的连接难度。
在一个实施例中，参见图5和图9所示，导引段52具有凹部100。凹部100从导引段52远离主体部321的表面朝靠近主体部321的方向凹陷。至少部分集流段61容纳于凹部100，从而在二次电池30的长度方向Y上，集流段61和导引段52两者相互叠加后的整体尺寸较小。在另一个实施例中，参见图15和图16所示，导引段52具有凹部100。凹部100从导引段52朝向主体部321的表面朝远离主体部321的方向凹陷。至少部 分集流段61容纳于凹部100，从而在二次电池30的长度方向Y上，集流段61和导引段52两者相互叠加后的整体尺寸较小。这样，一方面，提高集流段61和导引段52的结构紧凑性，有利于节省空间，提高二次电池30的能量密度；另一方面，有利于增大集流段61与主体部321的端面之间的间距，从而降低在极耳连接段62折弯过程中或者完成折弯压平极耳322过程中，导引段52和集流段61共同朝靠近主体部321变形而导致集流段61与主体部321发生接触，并对主体部321的至少部分极片施加压应力的可能性。在一个示例中，导引段52朝向主体部321的表面与集流段61朝向主体部321的表面相齐平，以使集流段61整体容纳于导引段52的凹部100内，有利于进一步增大集流段61和主体部321的端面之间的间距。
在一个示例中，参见图16至图19所示，二次电池30还包括绝缘部件70。绝缘部件70设置于导引段52和主体部321之间。绝缘部件70覆盖至少部分集流段61和导引段52的连接区域，也即在长度方向X上，至少部分集流段61被绝缘部件70覆盖。优选地，绝缘部件70覆盖整个集流段61，从而覆盖集流段61和导引段52的连接区域。绝缘部件70隔离集流段61和主体部321。可选地，绝缘部件70为片状结构。绝缘部件70可以粘接于集流段61和/或导引段52。在一个示例中，绝缘部件70被容纳于导引段52的凹部100内，有利于提高结构紧凑性，减少绝缘部件70、集流段61和导引段52三者在二次电池30的长度方向Y上相互叠加后的整体尺寸，有利于节省空间，提高二次电池30的能量密度。
在一个实施例中，参见图5、图15和图19所示，导引段52包括第一区域521以及相对第一区域521向远离主体部321方向凹陷的第二区域522。第一区域521和第二区域522沿远离顶盖板41的方向设置。集流段61连接于第一区域521。导引段52具有与第二区域522对应的让位空间200。在极耳连接段62折弯或者极耳322压平时，在让位空间200内插入支撑工具以通过第二区域522为导引段52提供方向远离主体部321的支撑力，以此有利于进一步减小导引段52朝主体部321的变形量。设置让位空间200，有利于提高支撑工具插接便利性，同时也降低因导引段52与主体部321之间的间距较小而导致支撑工具在插入过程中与主体部321发 生接触，从而导致支撑工具触碰到极片而对极片造成结构性损坏的可能性。在一个示例中，沿远离主体部321的方向，第二区域522远离主体部321的表面凸出于极耳322远离极耳连接段62的表面。
在一个实施例中，参见图20所示，导引段52包括两个支脚52a。两个支脚52a沿二次电池30的厚度方向X间隔设置。两个支脚52a之间具有间隙。每个支脚52a上设置一个连接件60。对于其中一个支脚52a，连接件60的极耳连接段62与对应的极耳322连接后，在极耳连接段62折弯或者极耳322压平过程中，该支脚52a对另一个支脚52a产生较小的应力干扰，并且该支脚52a的变形量也不易带动另一个支脚52a产生相同的变形量，从而有利于进一步降低导引段52整体朝靠近主体部321的方向的变形量。
在一个实施例中，转接片50的材料为铜、铜合金、铝或铝合金。连接件60的材料为铜、铜合金、铝或铝合金。
本申请实施例的二次电池30，包括各自单独设置的转接片50和连接件60。连接件60为中间过渡连接部件，用于连接导引段52和电极组件32的极耳322。连接件60包括集流段61和极耳连接段62。集流段61与导引段52连接固定。极耳连接段62与电极组件32的极耳322连接固定。连接件60的刚度小于导引段52的刚度，因此连接件60相对于导引段52更加易于变形。这样，在极耳连接段62与极耳322一同折弯时，外力通过极耳连接段62传递至导引段52上的作用力相对较小，从而可以有效减小在极耳连接段62折弯过程中，导引段52朝电极组件32的主体部321的变形，有利于降低涂覆有活性物质的极片受到来自导引段52所施加的压力而发生脱膜或掉粉的可能性，以此提高二次电池30的电化学性能及安全性能。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件，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 (14)

  1. 一种二次电池，包括：
    壳体；
    电极组件，设置于所述壳体内，所述电极组件包括主体部以及从所述主体部延伸出的极耳；
    顶盖组件，包括顶盖板和设置于所述顶盖板上的电极端子，所述顶盖板连接于所述壳体；
    集流构件，包括转接片和连接件，所述连接件与所述转接片分开提供并且相互连接，所述转接片与所述电极端子相连接，所述转接片包括导引段，所述导引段位于所述主体部沿所述二次电池的长度方向的一侧，并且所述导引段沿垂直所述长度方向的方向延伸；
    其中，所述连接件包括集流段和极耳连接段，所述集流段用于连接所述导引段，所述集流段设置于所述导引段和所述主体部之间，所述极耳连接段用于连接所述极耳，所述连接件被配置为：所述连接件自身刚度小于所述导引段的刚度，以使得所述连接件与所述极耳连接的部分相对于所述长度方向折弯时，能够减小所述导引段朝所述主体部的变形。
  2. 根据权利要求1所述的二次电池，其中，所述连接件的厚度小于所述导引段的厚度。
  3. 根据权利要求1所述的二次电池，其中，所述连接件的硬度小于所述导引段的硬度。
  4. 根据权利要求3所述的二次电池，其中，所述连接件经退火工艺处理。
  5. 根据权利要求1至4任一项所述的二次电池，其中，至少部分所述极耳连接段折弯于所述导引段远离所述主体部的一侧，所述极耳连接于所述极耳连接段远离所述导引段的表面。
  6. 根据权利要求1至4任一项所述的二次电池，其中，所述连接件还包括折弯段，所述折弯段连接所述集流段和所述极耳连接段，所述折弯段绕过所述导引段设置。
  7. 根据权利要求6所述的二次电池，其中，至少部分所述折弯段与所述导引段上沿所述二次电池的厚度方向的边缘部接触。
  8. 根据权利要求1至7任一项所述的二次电池，其中，所述连接件包括两个所述极耳连接段，所述集流段沿所述二次电池的厚度方向的相对两侧各自设置一个所述极耳连接段。
  9. 根据权利要求1至8任一项所述的二次电池，其中，所述导引段和所述集流段彼此层叠设置，并且通过焊接、铆接以及粘接任一种方式连接固定。
  10. 根据权利要求1至9任一项所述的二次电池，其中，所述导引段具有凹部，所述凹部从所述导引段朝向所述主体部的表面朝远离所述主体部的方向凹陷，至少部分所述集流段容纳于所述凹部。
  11. 根据权利要求10所述的二次电池，其中，所述导引段朝向所述主体部的表面与所述集流段朝向所述主体部的表面相齐平
  12. 根据权利要求1至11任一项所述的二次电池，其中，所述二次电池还包括绝缘部件，所述绝缘部件设置于所述导引段和所述主体部之间，所述绝缘部件覆盖至少部分所述集流段和所述导引段的连接区域。
  13. 一种电池模块，其中，包括如权利要求1至12任一项所述的二次电池。
  14. 一种使用二次电池作为电源的装置，其中，包括如权利要求1至12任一项所述的二次电池。
PCT/CN2020/086978 2020-03-18 2020-04-26 二次电池、电池模块以及使用二次电池作为电源的装置 WO2021184491A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080002102.0A CN113748561B (zh) 2020-03-18 2020-04-26 二次电池、电池模块以及使用二次电池作为电源的装置
EP20917269.1A EP3910724B1 (en) 2020-03-18 2020-04-26 Secondary battery, battery module, and device for using secondary battery as power source
US17/547,273 US11450931B2 (en) 2020-03-18 2021-12-10 Secondary battery, battery module, and device for using secondary battery as power source

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010189392.6A CN111048728B (zh) 2020-03-18 2020-03-18 二次电池、电池模块以及使用二次电池作为电源的装置
CN202010189392.6 2020-03-18

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/547,273 Continuation US11450931B2 (en) 2020-03-18 2021-12-10 Secondary battery, battery module, and device for using secondary battery as power source

Publications (1)

Publication Number Publication Date
WO2021184491A1 true WO2021184491A1 (zh) 2021-09-23

Family

ID=70230977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/086978 WO2021184491A1 (zh) 2020-03-18 2020-04-26 二次电池、电池模块以及使用二次电池作为电源的装置

Country Status (4)

Country Link
US (2) US11450931B2 (zh)
EP (1) EP3910724B1 (zh)
CN (2) CN111048728B (zh)
WO (1) WO2021184491A1 (zh)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111048728B (zh) 2020-03-18 2020-06-23 江苏时代新能源科技有限公司 二次电池、电池模块以及使用二次电池作为电源的装置
CN212011114U (zh) * 2020-04-26 2020-11-24 宁德时代新能源科技股份有限公司 二次电池、电池模块以及使用二次电池作为电源的装置
CN112303089B (zh) * 2020-04-30 2023-08-22 宁德时代新能源科技股份有限公司 铆接件、铆接组件、电池、电池组和用电装置
EP4030537B1 (en) * 2020-05-09 2024-01-10 Contemporary Amperex Technology Co., Limited Secondary battery and manufacturing method therefor, battery module, and apparatus
CN112701422B (zh) * 2021-03-24 2022-01-07 江苏时代新能源科技有限公司 电池单体、电池及用电设备
EP4170813A4 (en) * 2021-07-30 2024-03-06 Contemporary Amperex Technology Co Ltd BATTERY CELL, BATTERY, ELECTRICAL APPARATUS AND METHOD AND DEVICE FOR MANUFACTURING BATTERY CELL
CN113851788A (zh) * 2021-08-19 2021-12-28 湖北亿纬动力有限公司 连接结构及电池
JP2024503489A (ja) * 2021-11-19 2024-01-25 寧徳時代新能源科技股▲分▼有限公司 電池セル、電池、電力消費機器及び電池セルの製造方法と機器
WO2023133854A1 (zh) * 2022-01-14 2023-07-20 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备、电池单体的制造方法及设备
CN217239697U (zh) * 2022-01-21 2022-08-19 宁德时代新能源科技股份有限公司 电池单体及电池、用电装置
CN115064701A (zh) * 2022-05-20 2022-09-16 远景动力技术(江苏)有限公司 一种集流构件和电池制造方法
CN115458872B (zh) * 2022-11-10 2023-03-31 瑞浦兰钧能源股份有限公司 二次电池的转接片
AU2022379904A1 (en) * 2022-07-22 2024-02-08 Hangzhou Narada Power Technology Co., Ltd. Battery core connecting assembly and battery
WO2024026829A1 (zh) * 2022-08-05 2024-02-08 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN117832771A (zh) * 2022-09-29 2024-04-05 宁德时代新能源科技股份有限公司 连接构件、电池单体、电池以及用电设备
CN116247308B (zh) * 2023-05-11 2023-10-03 惠州市成泰自动化科技有限公司 电池揉平装置及揉平方法
CN117096514B (zh) * 2023-10-20 2024-03-29 江苏时代新能源科技有限公司 顶盖组件、电池及用电设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205406620U (zh) * 2016-02-29 2016-07-27 宁德时代新能源科技股份有限公司 极耳连接引脚及二次电池
JP2018190510A (ja) * 2017-04-28 2018-11-29 株式会社豊田自動織機 蓄電装置
CN208368603U (zh) * 2018-05-11 2019-01-11 合肥国轩高科动力能源有限公司 一种全极耳引流结构件和全极耳卷芯
CN208488923U (zh) * 2018-07-18 2019-02-12 昆山国显光电有限公司 显示面板
CN209658320U (zh) * 2019-05-24 2019-11-19 宁德时代新能源科技股份有限公司 电池单元及电池模组
CN111048728A (zh) * 2020-03-18 2020-04-21 江苏时代新能源科技有限公司 二次电池、电池模块以及使用二次电池作为电源的装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268478B2 (en) * 2009-08-17 2012-09-18 Sb Limotive Co., Ltd. Rechargeable battery having anti-vibration member
CN108140795B (zh) * 2015-09-29 2021-09-10 株式会社杰士汤浅国际 蓄电元件及蓄电元件的制造方法
CN106299447B (zh) 2016-08-29 2018-12-21 宁德时代新能源科技股份有限公司 电池
EP3451415B1 (en) 2017-08-31 2020-03-25 Samsung SDI Co., Ltd. Secondary battery
KR102371196B1 (ko) * 2017-08-31 2022-03-07 삼성에스디아이 주식회사 이차 전지
KR102606100B1 (ko) * 2018-01-17 2023-11-24 삼성에스디아이 주식회사 이차 전지
KR20200108719A (ko) * 2019-03-11 2020-09-21 삼성에스디아이 주식회사 이차 전지
CN209658286U (zh) * 2019-04-25 2019-11-19 宁德时代新能源科技股份有限公司 电池单元和电池模组

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205406620U (zh) * 2016-02-29 2016-07-27 宁德时代新能源科技股份有限公司 极耳连接引脚及二次电池
JP2018190510A (ja) * 2017-04-28 2018-11-29 株式会社豊田自動織機 蓄電装置
CN208368603U (zh) * 2018-05-11 2019-01-11 合肥国轩高科动力能源有限公司 一种全极耳引流结构件和全极耳卷芯
CN208488923U (zh) * 2018-07-18 2019-02-12 昆山国显光电有限公司 显示面板
CN209658320U (zh) * 2019-05-24 2019-11-19 宁德时代新能源科技股份有限公司 电池单元及电池模组
CN111048728A (zh) * 2020-03-18 2020-04-21 江苏时代新能源科技有限公司 二次电池、电池模块以及使用二次电池作为电源的装置

Also Published As

Publication number Publication date
EP3910724A1 (en) 2021-11-17
EP3910724A4 (en) 2022-06-01
US11450931B2 (en) 2022-09-20
CN113748561A (zh) 2021-12-03
CN113748561B (zh) 2024-05-10
EP3910724C0 (en) 2023-10-25
CN111048728A (zh) 2020-04-21
US20230187788A1 (en) 2023-06-15
EP3910724B1 (en) 2023-10-25
US20220115748A1 (en) 2022-04-14
CN111048728B (zh) 2020-06-23

Similar Documents

Publication Publication Date Title
WO2021184491A1 (zh) 二次电池、电池模块以及使用二次电池作为电源的装置
KR100637443B1 (ko) 이차 전지와 이에 사용되는 단자 조립체
JP5345114B2 (ja) 二次電池
US8771863B2 (en) Battery module and manufacturing method of battery module
WO2020238660A1 (zh) 电池单元及其制造方法、电池模组
US10629882B2 (en) Battery module
EP2783406B1 (en) Battery comprising an electric connector
CN105591040A (zh) 电存储装置
CN212011114U (zh) 二次电池、电池模块以及使用二次电池作为电源的装置
JP4373385B2 (ja) ベントプレートを含むキャップ組立体及びこのキャップ組立体を含む二次電池
US11929510B2 (en) Secondary battery and manufacturing method thereof, battery module, and apparatus
WO2018142809A1 (ja) 蓄電装置
EP3989352A1 (en) Secondary battery, battery module, and device using battery as power source
JP5810861B2 (ja) 電池
CN213150964U (zh) 电极组件、电芯及电池模组
KR20060028063A (ko) 집전판용 플레이트와 이의 이차 전지 및 전지 모듈
WO2020156178A1 (zh) 二次电池
CN218602565U (zh) 外壳、电池单体、电池及用电设备
CN114188673A (zh) 裸电芯、电芯及电子设备
CN110192292B (zh) 电池单元和制造电池单元的方法
CN219180737U (zh) 电芯组件、电池模组和电池包
CN219534801U (zh) 电池及电池装置
CN115566328B (zh) 电化学装置以及用电装置
JP2022112412A (ja) 端子部品、二次電池および組電池
CN115863927A (zh) 集流构件、储能装置和用电设备

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2020917269

Country of ref document: EP

Effective date: 20210811

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

Ref document number: 20917269

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE