WO2023221598A1 - Ensemble de connexion, élément de batterie, batterie et dispositif électrique - Google Patents

Ensemble de connexion, élément de batterie, batterie et dispositif électrique Download PDF

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Publication number
WO2023221598A1
WO2023221598A1 PCT/CN2023/078799 CN2023078799W WO2023221598A1 WO 2023221598 A1 WO2023221598 A1 WO 2023221598A1 CN 2023078799 W CN2023078799 W CN 2023078799W WO 2023221598 A1 WO2023221598 A1 WO 2023221598A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
insulating layer
fuse
edge
connection part
Prior art date
Application number
PCT/CN2023/078799
Other languages
English (en)
Chinese (zh)
Inventor
梅祥
柯海波
杨开焕
李全坤
程启
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
Publication of WO2023221598A1 publication Critical patent/WO2023221598A1/fr

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Classifications

    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, specifically, to a connecting component, a battery cell, a battery and electrical equipment.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the purpose of this application is to provide a connecting component, a battery cell, a battery and an electrical device.
  • This connection component is applied to a battery cell and can improve the safety of the battery cell.
  • connection assembly for a battery cell.
  • the connection assembly includes: a connection piece, including a first connection part for connecting the tab of the electrode assembly, and a second connection for connecting the electrode terminal. part, a third connection part for connecting the first connection part and the second connection part, a fuse part is formed between the first connection part and the third connection part, the first connection part , the fuse part and the third connecting part are arranged along the first direction; an insulating member wraps the fuse part, the insulating member includes a first insulating layer and a second insulating layer, and the first insulating layer is disposed on The side of the connecting member facing the electrode assembly, the second insulating layer is provided on the side of the connecting member away from the electrode assembly; wherein, along the first direction, the first insulating layer The maximum distance from the end of the layer away from the first connection part to the fuse part is greater than the minimum distance from the second connection part to the fuse part.
  • the maximum distance from the end of the first insulating layer away from the first connection part in the first direction to the fuse part is greater than the minimum distance from the second connection part to the fuse part.
  • the projection of the first insulating layer on the connecting piece does not overlap with the second connecting part.
  • the projection of the first insulating layer on the connecting piece does not overlap with the second connecting part, preventing the first insulating layer from extending to the formation position of the second connecting part, and avoiding interference with other components when the battery cells are assembled. Assembly interference ensures assembly accuracy.
  • the first insulation layer includes a first escape portion for avoiding the second connection portion, and an edge of the first escape portion surrounds at least a part of the second connection portion, so The minimum distance between the edge of the first escape part and the edge of the second connection part is h1, which satisfies 0.5mm ⁇ h1 ⁇ 2mm.
  • the second connecting portion when the second connecting portion is stamped and formed, the second connecting portion is formed by a recess from the side of the connecting piece facing the electrode assembly toward the side of the connecting piece facing away from the electrode assembly.
  • the connecting piece is formed in the second connecting portion.
  • the first insulating layer has a larger area on the side of the connector facing the electrode assembly. , so that the first insulating layer has a better insulation effect.
  • it can reduce the risk that the edge of the first insulating layer covers the deformation area and affect the assembly accuracy, ensuring the assembly accuracy of the connecting component and other components.
  • the distance between the edge of the first escape part and the edge of the second connection part is equal.
  • the distance between the edge of the first escape part and the edge of the second connection part is equal, ensuring that the first insulating layer can have a larger area to have better performance on the side of the connector facing the electrode assembly. insulation effect.
  • a maximum distance from an end of the first insulating layer away from the first connection part to the fuse part is less than an end of the second connection part away from the The maximum distance from one end of the fuse to the fuse.
  • the maximum distance from the end of the first insulating layer away from the first connection part to the fuse part is less than the maximum distance from the end of the second connection part away from the fuse part to the fuse part, and the first insulating layer is in the first direction.
  • the end that does not exceed the second connecting part and is away from the fuse part reduces the difficulty of processing and forming the first insulating layer.
  • the projection of the second insulating layer on the connecting piece does not overlap with the second connecting part.
  • the projection of the second insulating layer on the connecting piece does not overlap with the second connecting part, which prevents the second insulating layer from extending to the formation position of the second connecting part, and avoids interference with other components when the battery cells are assembled. Assembly interference ensures assembly accuracy.
  • the second insulation layer includes a second escape portion for avoiding the second connection portion, and an edge of the second escape portion surrounds at least a part of the second connection portion, so The minimum distance between the edge of the second escape part and the edge of the second connecting part is h2, which satisfies 0.5mm ⁇ h2 ⁇ 2mm.
  • the second connecting portion when the second connecting portion is stamped and formed, the second connecting portion is formed by a recess from the side of the connecting piece facing the electrode assembly toward the side of the connecting piece facing away from the electrode assembly.
  • the connecting piece is formed in the second connecting portion.
  • a maximum distance from an end of the second insulating layer away from the first connection part to the fuse part is greater than a distance from the second connection part to the fuse part. minimum distance.
  • the second insulating layer exceeds an end of the second connecting portion close to the fuse portion in the first direction, so that the second insulating layer has a larger area and has a better insulation effect.
  • a maximum distance from an end of the second insulating layer away from the first connection part to the fuse part is less than an end of the second connection part away from the The maximum distance from one end of the fuse to the fuse.
  • the maximum distance from the end of the second insulating layer away from the first connection part to the fuse part is less than the maximum distance from the end of the second connection part away from the fuse part to the fuse part, and the second insulating layer is in the first direction. It does not exceed the fuse part, which reduces the difficulty of processing and forming the second insulation layer.
  • the insulating member further includes two fourth connecting parts, and the two fourth connecting parts respectively cover at least part of two edges of the connecting piece that are opposite along the second direction,
  • the second direction is perpendicular to the first direction and the thickness direction of the connecting member, and the first insulating layer and the second insulating layer are connected through the two fourth connecting parts.
  • the first insulating layer and the second insulating layer are connected through the fourth connecting part to ensure the connection strength between the insulating part and the connecting part.
  • the third connection part is provided with a channel
  • the insulation member further includes a fifth connection part, the fifth connection part fills the channel and connects the first insulation layer and the Second insulation layer.
  • the channel is arranged to facilitate the accommodation of the fifth connecting part, so that the fifth connecting part connects the first insulating layer and the second insulating layer to ensure a stable connection between the insulating piece and the connecting piece.
  • the connecting piece has a notch, the notch is located on at least one side of the fuse portion along a second direction, and the second direction is perpendicular to the first direction and the connecting piece.
  • the insulating member further includes a sixth connecting portion, the sixth connecting portion fills the gap and connects the first insulating layer and the second insulating layer.
  • the gap formed on the connecting piece reduces the flow area here, which can play a safety role; the sixth connecting part fills the gap, and the sixth connecting part connects the first insulating layer and the second insulating layer , making the connection between the insulating parts and the connecting parts stable, and having better insulation and isolation effect.
  • the insulating part is injection molded on the connecting part.
  • the insulating part is injection molded on the connecting part, which facilitates processing and manufacturing, and the connection between the insulating part and the connecting part is stable.
  • the application also provides a battery cell, including: a casing including a wall; an electrode assembly disposed in the casing; and an electrode terminal disposed on the wall; as described in any of the above embodiments
  • the first connecting part is connected to the tab of the electrode assembly, and the second connecting part is connected to the electrode terminal.
  • the present application also provides a battery, including the battery cell as described in any of the above embodiments.
  • this application also provides an electrical device, including the battery as described in any of the above embodiments.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is a schematic diagram of the exploded structure of a battery provided by some embodiments of the present application.
  • Figure 3 is a schematic diagram of the exploded structure of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of a connection component provided by some embodiments of the present application.
  • Figure 5 is an exploded schematic structural diagram of a connection component provided by some embodiments of the present application.
  • Figure 6 is a schematic diagram of the assembly of the first insulating layer and the connector provided by some embodiments of the present application.
  • Figure 7 is a schematic diagram of the assembly of the second insulating layer and the connector provided by some embodiments of the present application.
  • Figure 8 is a cross-sectional view along the A-A direction of Figure 7;
  • Figure 9 is a cross-sectional view along the B-B direction of Figure 6;
  • Figure 10 is a cross-sectional view along the C-C direction of Figure 7;
  • Marking description 100-battery; 10-box; 11-first part; 12-second part; 20-battery cell; 21-end cover; 21a-electrode terminal; 22-casing; 23-electrode assembly; 23a -Tab; 24-connection component; 241-connector; 241a-first surface; 241b-second surface; 2411-first connection part; 2412-second connection part; 2413-third connection part; 2413a-channel ; 2414-fuse part; 2414a-notch; 242-insulator; 2421-first insulation layer; 2421a-first avoidance part; 2422-second insulation layer; 2422a-second avoidance part; 2423-fourth connection part; 2424-fifth connection part; 2425-sixth connection part; 200-controller; 300-motor; 1000-vehicle.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to means two or more pieces (including two pieces), unless otherwise clearly and specifically limited.
  • the battery mentioned refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode plate, a negative electrode plate and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector without the positive electrode active material layer is used as a positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector without the negative electrode active material layer is used as a negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that large currents can pass through without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.
  • the battery cell also includes a connecting piece, which is used to electrically connect the tabs of the electrode assembly and the electrode terminals.
  • the connector In order to ensure the safety of the battery cells, the connector usually includes a fuse. When a short circuit occurs in the external circuit, the current flowing through the connector will increase. When the current exceeds a certain threshold, the fuse is blown, thereby disconnecting the circuit. .
  • the existing fusing part In order to ensure that the circuit remains open after fusing and to avoid re-overlap of the fusing position, the existing fusing part will be designed with insulating parts to maintain the distance between both sides of the fusing part. However, the size of the insulating part is usually small and is only provided at the fusing part.
  • the tabs may be too long, causing the two parts of the connector on both sides of the fuse part to overlap, or the electrolyte may enter the inside of the fuse part, causing the two parts of the connector to be electrically reconnected after the fuse is broken.
  • the insulation reliability between the battery and the electrode assembly is poor, and the safety performance of the battery cell is poor, and short circuit is prone to occur. In serious cases, it may cause safety risks such as fire and explosion.
  • connection assembly for the battery cells to increase the insulation
  • the coverage area of the connector on both sides of the connector can, on the one hand, reduce the risk of re-overlap of the two parts of the connector after the fuse part is blown due to too long tabs. On the other hand, it can increase the insulation area and reduce the arcing phenomenon, thus improving the performance of the connector.
  • the safety of the battery cells of this connection component is not limited to.
  • the insulating member includes a first insulating layer and a second insulating layer.
  • the first insulating layer is disposed on a side of the connecting member facing the electrode assembly
  • the second insulating layer is disposed on a side of the connecting member facing away from the electrode assembly.
  • the first insulating layer and the second insulating layer provide insulation isolation on opposite sides of the connector respectively
  • the first insulating layer has a larger coverage area on the side of the connector facing the electrode assembly, which improves the efficiency of the connector. The insulation effect with the electrode assembly reduces the risk of short circuit, making the battery cells highly safe.
  • the battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, electrical devices such as vehicles, ships, or aircrafts.
  • a power supply system including the battery cells, batteries, etc. disclosed in this application can be used to form the electrical device.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, Spacecraft and more.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electric device 1000 according to an embodiment of the present application is used as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 can be used to provide power for the vehicle 1000.
  • the battery 100 can be used as an operating power source for the vehicle 1000 and used for the vehicle's circuit system, such as for starting, navigating, and operating power requirements of the vehicle.
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to drive the vehicle 1000 power.
  • FIG. 2 is a schematic diagram of an exploded structure of the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 of accommodation space.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 is covered with the open side of the second part 12.
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 .
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells 20 .
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • FIG. 3 is an exploded structural diagram of a battery cell 20 provided in some embodiments of the present application.
  • the battery cell 20 refers to the smallest unit that constitutes the battery.
  • the battery cell 20 includes an end cover 21 , a case 22 , an electrode assembly 23 , a connection assembly 24 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher durability. Structural strength and safety performance can also be improved.
  • the end cap 21 may be provided with functional components such as electrode terminals 21a.
  • the electrode terminal 21a may be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20 .
  • the end cap 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold.
  • the end cap 21 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • an insulating member may also be provided inside the end cover 21 , and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber, etc.
  • the housing 22 is a component used to cooperate with the end cover 21 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte, and other components.
  • the housing 22 and the end cover 21 can be independent components, and an opening can be provided on the housing 22, and the end cover 21 covers the opening at the opening to form an opening. into the internal environment of the battery cell 20.
  • the end cover 21 and the housing 22 can also be integrated. Specifically, the end cover 21 and the housing 22 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 22 When, the end cover 21 is closed with the housing 22 again.
  • the housing 22 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23 .
  • the housing 22 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.
  • the embodiment of the present application takes the shape of the housing 22 as a rectangular parallelepiped as an example.
  • the electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur.
  • One or more electrode assemblies 23 may be contained within the housing 22 .
  • the electrode assembly 23 is mainly formed by winding or stacking a positive electrode piece and a negative electrode piece, and is usually provided with a separator between the positive electrode piece and the negative electrode piece.
  • the separator is used to separate the positive electrode piece and the negative electrode piece to prevent the positive electrode from The pole piece and the negative pole piece are internally short-circuited.
  • the portions of the positive electrode tab and the negative electrode tab that contain active material constitute the main body of the electrode assembly 23 , and the portions of the positive electrode tab and the negative electrode tab that do not contain active material constitute the tabs 23 a respectively.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body.
  • the positive active material and the negative active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.
  • connection assembly 24 is a component for electrically connecting the tab 23 a of the electrode assembly 23 and the electrode terminal 21 a.
  • the connection assembly 24 includes a connection member 241, one side of the connection member 241 is disposed facing the electrode assembly 23, and the other side of the connection member 241 is disposed away from the electrode assembly 23.
  • the connection member 241 is electrically connected to the tab 23a and the electrode terminal 21a.
  • Figure 3 is a schematic structural diagram of the connection component 24 provided by some embodiments of the present application
  • Figure 5 is a connection component provided by some embodiments of the present application.
  • Figure 6 is a schematic diagram of the assembly of the first insulating layer 2421 and the connector 241 provided by some embodiments of the present application.
  • Figure 7 is an assembly diagram of the second insulating layer 2422 and the connector 241 provided by some embodiments of the present application.
  • Schematic diagram, Figure 8 is a cross-sectional view along the A-A direction of Figure 7 .
  • the present application provides a connection assembly 24 for the battery cell 20 .
  • the connection assembly 24 includes a connection piece 241 and an insulating piece 242 .
  • the connector 241 includes a first connection part 2411 for connecting the tab 23a of the electrode assembly 23, a second connection part 2412 for connecting the electrode terminal 21a, and a first connection part 2411 and the second connection part 2412.
  • a fuse part 2414 is formed between the first connection part 2411 and the third connection part 2413.
  • the first connection part 2411, the fuse part 2414 and the third connection part 2413 are arranged along the first direction X.
  • the insulating member 242 wraps the fuse part 2414.
  • the insulating member 242 includes a first insulating layer 2421 and a second insulating layer 2422.
  • the first insulating layer 2421 is provided on the side of the connecting member 241 facing the electrode assembly 23, and the second insulating layer 2422 is provided on The side of the connecting member 241 facing away from the electrode assembly 23 .
  • the direction indicated by the letter X is the first direction
  • the direction indicated by the letter Z is the thickness direction of the connecting member 241 , and the thickness direction Z is perpendicular to the first direction X.
  • the connector 241 is a component used to realize the electrical connection between the tab 23a of the electrode assembly 23 and the electrode terminal 21a.
  • the connector 241 is a conductive component.
  • the connector 241 can be a metal (such as copper, aluminum, etc.) piece, which has good Conductive properties.
  • the fuse portion 2414 is a portion of the connector 241 formed between the first connection portion 2411 and the third connection portion 2413 and is used to fuse when the current exceeds a threshold, thereby protecting the battery cell 20 .
  • the first connecting part 2411, the third connecting part 2413 and the fuse part 2414 of the connecting piece 241 can be located on the same plane, the second connecting part 2412 can protrude from other parts of the connecting piece 241, and the second connecting part 2412 can be circular, Square, cylinder, truncated cone or other shapes that meet the connection requirements.
  • the second connecting portion 2412 may be protruded on a side of the connecting member 241 away from the electrode assembly 23 , and correspondingly, may be recessed on a side of the connecting member 241 facing the electrode assembly 23 .
  • the connector 241 includes a first surface 241a facing the electrode assembly 23 and a second surface 241b away from the electrode assembly 23.
  • the first insulating layer 2421 covers the first surface 241a
  • the second insulating layer 2422 covers the second surface 241b.
  • the second connecting portion 2412 forms a convex bulge on the second surface 241b, and correspondingly, the second connecting portion 2412 forms a depression on the second surface 241b.
  • the insulator 242 is an electrically insulating component to reduce the risk of short circuit.
  • the material of the insulating member 242 may be rubber, plastic, etc.
  • the insulating member 242 wraps the fuse part 2414 means that the insulating member 242 is arranged around the circumference of the fuse part 2414. In other words, the fuse part 2414 is circumferentially wrapped by the insulating member 242.
  • the first insulating layer 2421 and the second insulating layer 2422 are two parts of the insulating member 242.
  • the first insulating layer 2421 is located on the side of the connecting member 241 facing the electrode assembly 23, and the second insulating layer 2422 is located on the side of the connecting member 241 away from the electrode. side of assembly 23.
  • the maximum distance H1 from the end of the first insulating layer 2421 away from the first connection part 2411 to the fuse part 2414 refers to, in the first direction X, the edge of the end of the first insulating layer 2421 away from the first connection part 2411
  • the maximum value of the distance from the fuse portion 2414 for example, when the fuse portion 2414 extends along the second direction Y, the second direction Y is perpendicular to the first direction X and the thickness direction Z of the connector 241, if the first insulating layer
  • the edge of the end of 2421 away from the first connection part 2411 extends along the second direction Y, then the distance from any position of the edge of the end of the first insulation layer 2421 away from the first connection part 2411 to the fuse part 2414 is equal.
  • One side of the electrode assembly 23 has better insulation effect.
  • the minimum distance H2 from the second connection part 2412 to the fuse part 2414 refers to the minimum value of the distance between the edge of one end of the second connection part 2412 close to the fuse part 2414 and the fuse part 2414 in the first direction X. .
  • the first insulating layer 2421 and the second insulating layer 2422 are distributed on opposite sides of the connecting member 241 to increase the coverage area of the insulating member on both sides of the connecting member 241 so that the connecting member 241 It has a good insulation effect. On the one hand, it reduces the risk of the two parts of the connector re-overlapping after the fuse part is blown due to the excessive length of the pole lug. On the other hand, it increases the insulation area and reduces the arcing phenomenon, thereby improving the connection including the The safety of the battery cells 20 of the assembly 24.
  • the projection of the first insulating layer 2421 on the connecting member 241 does not overlap with the second connecting portion 2412 .
  • the projection of the first insulation layer 2421 on the connector 241 does not overlap with the second connection part 2412 means that along the thickness direction Z, the first insulation layer 2421 does not block the second connection part 2412.
  • the projection of the first insulating layer 2421 on the connector 241 does not overlap with the second connecting portion 2412, which prevents the first insulating layer 2421 from extending to the formation position of the second connecting portion 2412 when the battery cell 20 is assembled. , to avoid assembly interference with other components and ensure assembly accuracy.
  • the first insulating layer 2421 includes a first escape portion 2421 a for avoiding the second connection portion 2412 , and the edge of the first escape portion 2421 a surrounds at least one side of the second connection portion 2412 .
  • the minimum distance between the edge of the first escape part 2421a and the edge of the second connection part 2412 is h1, which satisfies 0.5 mm ⁇ h1 ⁇ 2 mm.
  • the first escape part 2421a may be a notch or a through hole provided in the first insulation layer 2421 to expose the second connection part 2412.
  • the edge of the first escape part 2421a refers to the outline of the first insulation layer 2421 at the area where the first escape part 2421a is provided.
  • the edge of the first escape part 2421a surrounds at least a part of the second connection part 2412 means that the first escape part 2421a is provided around the second connection part 2412.
  • the first escape part 2421a can be a gap
  • the second connection part 2412 Located in the gap the edge of the first escape part 2421a surrounds a part of the second connection part 2412;
  • the first escape part 2421a may be a through hole
  • the second connection part 2412 is located in the through hole
  • the connecting piece 241 can be a metal piece, and the connecting piece 241 can be stamped. That is, the second connecting part 2412 is a stamped convex part. When the second connecting part 2412 is stamped and formed, the second connecting part 2412 is formed by the connecting piece 241 The side facing the electrode assembly 23 is recessed toward the side of the connector 241 away from the electrode assembly 23.
  • the connector 241 has a deformation area at the formation position of the second connection portion 2412. If the first insulating layer 2421 covers the deformation area , it will cause the first insulating layer 2421 to rise in the deformation area, occupying more installation space, and affecting the assembly of the connecting component 24 and other components; The minimum distance between them meets the above range.
  • the first insulating layer 2421 has a larger area on the side of the connector 241 facing the electrode assembly 23, so that the first insulating layer 2421 has a better insulation effect.
  • the risk of the edge of the first insulating layer 2421 covering the deformation area affecting the assembly accuracy can be reduced, and the assembly accuracy of the connection component 24 and other components can be ensured.
  • the distance between the edge of the first escape part 2421a and the edge of the second connection part 2412 is equal.
  • the distance between the edge of the first escape part 2421a and the edge of the second connection part 2412 is equal means that in the extending direction of the edge of the first escape part 2421a, any point on the edge of the first escape part 2421a reaches The distance between the edges of the second connecting portion 2412 is equal.
  • the edge contour of the first escape portion 2421a matches the edge contour of the second connecting portion 2412.
  • the edge contour of the second connecting portion 2412 is circular.
  • the edge profile of the first escape portion 2421a may be an arc or a circle concentric with the circle.
  • the edge profile of the first avoiding portion 2421a may be a straight line or a straight line formed by multiple straight lines.
  • the distance between the edge of the first escape portion 2421a and the edge of the second connecting portion 2412 is equal to ensure that the first insulating layer 2421 can have a larger area to provide a protective layer on the side of the connecting member 241 facing the electrode assembly 23. Has better insulation effect.
  • the maximum distance H3 from the end of the second connection part 2412 away from the fuse part 2414 to the fuse part 2414 refers to, in the first direction the maximum distance between them.
  • the maximum distance H1 from the end of the first insulating layer 2421 away from the first connection part 2411 to the fuse part 2414 is smaller than the maximum distance H3 from the end of the second connection part 2412 away from the fuse part 2414 to the fuse part 2414.
  • the first insulating layer 2421 is between The end in the first direction X that does not exceed the second connecting portion 2412 away from the fuse portion 2414 reduces the difficulty of processing and forming the first insulating layer 2421 .
  • the extension size of the first insulating layer 2421 in the first direction is difficult to control, and the molding of the first insulating layer 2421 is more difficult.
  • the projection of the second insulating layer 2422 on the connecting member 241 does not overlap with the second connecting portion 2412 .
  • the projection of the second insulation layer 2422 on the connector 241 does not overlap with the second connection part 2412 means that along the thickness direction Z, the second insulation layer 2422 does not block the second connection part 2412.
  • the projection of the second insulating layer 2422 on the connector 241 does not overlap with the second connecting portion 2412, which prevents the second insulating layer 2422 from extending to the formation position of the second connecting portion 2412 when the battery cell 20 is assembled. , to avoid assembly interference with other components and ensure assembly accuracy.
  • the second insulating layer 2422 includes a second escape portion 2422a for avoiding the second connection portion 2412 , and the edge of the second escape portion 2422a surrounds at least a portion of the second connection portion 2412 .
  • the minimum distance between the edge of the second escape portion 2422a and the edge of the second connecting portion 2412 is h2, which satisfies 0.5mm ⁇ h2 ⁇ 2mm.
  • the second escape part 2422a may be a notch or a through hole provided in the second insulation layer 2422 to expose the second connection part 2412.
  • the edge of the second relief part 2422a refers to the outline of the second insulation layer 2422 at the area where the second relief part 2422a is provided.
  • the edge of the second escape part 2422a surrounds at least a part of the second connection part 2412 means that the second escape part 2422a is provided around the second connection part 2412.
  • the second escape part 2422a can be a gap, and the second connection part 2412 Located in the gap, the edge of the second escape part 2422a surrounds a part of the second connection part 2412; alternatively, the second escape part 2422a may be a through hole, the second connection part 2412 is located in the through hole, and the edge of the second escape part 2422a The edge surrounds the entire second connecting portion 2412.
  • the connecting piece 241 can be a metal piece, and the connecting piece 241 can be stamped. That is, when the second connecting part 2412 is stamped and formed, the second connecting part 2412 faces from the side of the connecting piece 241 facing the electrode assembly 23 to the side of the connecting piece 241 . The side away from the electrode assembly 23 is recessed, and the connector 241 has a deformed area at the formation position of the second connecting portion 2412. If the second insulating layer 2422 covers the deformed area, the second insulating layer 242 will be formed.
  • the second insulating layer 2422 is tilted in this deformation area, occupying more installation space and affecting the assembly of the connecting component 24 and other components; the minimum distance between the edge of the second escape portion 2422a and the edge of the second connecting portion 2412 meets the above range,
  • the second insulating layer 2422 has a larger area on the side of the connector 241 facing the electrode assembly 23, so that the second insulating layer 2422 has a better insulating effect.
  • the second insulating layer 2422 can be reduced. The risk of the edge covering the deformation area and affecting the assembly accuracy ensures the assembly accuracy of the connecting component 24 and other components.
  • the distance between the edge of the second escape portion 2422a and the edge of the second connection portion 2412 is equal.
  • the distance between the edge of the second escape part 2422a and the edge of the second connection part 2412 is equal means that in the extending direction of the edge of the second escape part 2422a, any point on the edge of the second escape part 2422a reaches The distances between the edges of the second connecting portion 2412 are all equal.
  • the edge profile of the second escape portion 2422a matches the edge profile of the second connecting portion 2412.
  • the edge profile of the second connecting portion 2412 is circular.
  • the edge profile of the second escape portion 2422a may be an arc or a circle concentric with the circle.
  • the edge profile of the second avoiding portion 2422a may be a straight line or a straight line formed by multiple straight lines.
  • the edge contour of the second escape portion 2422a may be the same as the first escape portion 2422a.
  • the edge profiles of 2421a are the same or different.
  • the maximum distance H4 from the end of the second insulating layer 2422 away from the first connection part 2411 to the fuse part 2414 refers to, in the first direction X, the edge of the end of the second insulating layer 2422 away from the first connection part 2411 The maximum value of the distance from the fuse part 2414. For example, when the fuse part 2414 extends along the second direction Y, if the edge of one end of the second insulating layer 2422 away from the first connection part 2411 extends along the second direction, then the The distance from any position of the edge of one end of the two insulating layers 2422 away from the first connecting portion 2411 to the fuse portion 2414 is equal.
  • the second insulating layer 2422 exceeds the end of the second connecting portion 2412 close to the fuse portion 2414 in the first direction X, so that the second insulating layer 2422 has a larger area and has a better insulation effect.
  • the maximum distance H4 from the end of the second insulating layer 2422 away from the first connection part 2411 to the fuse part 2414 is less than the maximum distance H3 from the end of the second connection part 2412 away from the fuse part 2414 to the fuse part 2414.
  • the second insulating layer 2422 does not exceed the fuse portion 2414 in the first direction X, which reduces the difficulty of processing and forming the second insulating layer 2422. For example, during the preparation process of injection molding of the insulating member 242 on the connecting member 241 , if the extension size of the second insulating layer 2422 in the first direction The thickness of the end away from the fuse portion 2414 is difficult to control, and the molding of the second insulating layer 2422 is relatively difficult.
  • the insulating member 242 further includes two fourth connections. portion 2423, and the two fourth connecting portions 2423 respectively cover at least part of the two opposite edges of the connecting member 241 along the second direction Y.
  • the second direction Y is perpendicular to the first direction X and the thickness direction Z of the connecting member 241.
  • the first insulation layer 2421 and the second insulation layer 2422 are connected through two fourth connection parts 2423.
  • the two fourth connecting parts 2423 respectively cover at least part of the two opposite edges of the connecting member 241 along the second direction Y” means that along the first direction At least part of the edge in the two directions Y, the fourth connecting portion 2423 at least surrounds the fuse portion 2414, and the size of the fourth connecting portion 2423 in the first direction X is the same as the size of the first insulating layer 2421 in the first direction X.
  • Two fourth connecting parts 2423 are located on opposite sides of the connecting member 241 along the second direction Y.
  • the first insulating layer 2421 and the second insulating layer 2422 are connected through the two fourth connecting parts 2423, so that the first insulating layer 2421, The second insulation layer 2422 and the two fourth connection parts 2423 wrap the fuse part 2414.
  • the first insulating layer 2421 and the second insulating layer 2422 are connected through the fourth connecting part 2423 to ensure the connection strength between the insulating member 242 and the connecting member 241.
  • Figure 9 is a cross-sectional view along the B-B direction of Figure 6.
  • the third connection part 2413 is provided with a channel 2413a
  • the insulating member 242 also includes a fifth connection part 2424.
  • the fifth connection part 2424 fills the channel 2413a and connects the first insulating layer 2421 and the second insulating layer 2422. .
  • the channel 2413a refers to an area on the third connecting part 2413 and passes through the third connecting part 2413 in the thickness direction Z.
  • the channel 2413a connects two opposite surfaces of the third connecting part 2413 in the thickness direction Z.
  • channel 2413a may be a through hole.
  • the through hole may be a stepped hole, or, along the thickness direction Z, the cross-sectional area of the through hole is equal from the side of the connector facing the electrode assembly to the side away from the electrode assembly.
  • the cross-section of the through hole can be of any shape, such as circular, rectangular, triangular, special-shaped, etc.
  • the number of channels 2413a may be one or multiple. When the number of channels 2413a is multiple, the multiple channels 2413a may be spaced apart along the second direction Y. Optionally, the number of channels 2413a is two, and the two channels 2413a are spaced apart along the second direction Y.
  • the fifth connecting portion 2424 is a portion of the insulating member 242 used to connect the first insulating layer 2421 and the second insulating layer 2422 . "The fifth connection part 2424 fills the channel 2413a" means that the surface of the fifth connection part 2424 is in contact with the surface of the channel 2413a.
  • the channel 2413a is provided to facilitate the accommodation of the fifth connecting part 2424, so that the fifth connecting part 2424 connects the first insulating layer 2421 and the second insulating layer 2422, ensuring a stable connection between the insulating member 242 and the connecting member 241. .
  • Figure 10 is a cross-sectional view along the C-C direction of Figure 7.
  • the connecting member 241 has a notch 2414a.
  • the notch 2414a is located on at least one side of the fuse portion 2414 along the second direction Y.
  • the second direction Y is perpendicular to the first direction X and the thickness direction Z of the connecting member 241.
  • the insulating member 242 further includes a sixth connecting portion 2425, which fills the gap 2414a and connects the first insulating layer 2421 and the second insulating layer 2422.
  • the notch 2414a refers to the area provided on the connecting member 241 and penetrating the connecting member 241 along the thickness direction Z.
  • the notch 2414a is located at the edge of the fuse portion 2414 along the second direction Y.
  • the insulating member 242 may be an annular structure to wrap the fuse part 2414; the sixth connecting part 2425 is a structure provided on the inner wall of the insulating part 242, and the sixth connecting part 2425 may connect the first insulating layer 2421 and the second insulating layer 2422.
  • the sixth connecting part 2425 fills the gap 2414a means that the surface of the sixth connecting part 2425 is in contact with the surface of the gap 2414a.
  • the gap 2414a formed on the connector 241 reduces the flow area here, which can play a safety role; the sixth connection part 2425 fills the gap 2414a, and the sixth connection part 2425 is connected to the first insulating layer 2421 and the second insulating layer 2422 make the connection between the insulating member 242 and the connecting member 241 stable and have a better insulation and isolation effect.
  • the insulating member 242 is injection molded on the connecting member 241 .
  • the insulating member 242 is injection molded on the connecting member 241" means that the insulating member 242 is formed by solidifying molten plastic on the connecting member 241, so that the insulating member 242 wraps the fuse portion 2414.
  • the channel 2413a may be a channel for the flow of molten plastic.
  • the connecting member 241 is placed in the mold. Inject molten plastic into the mold, and the molten plastic flows to the bottom of the connector 241 through the channel 2413a to form a first insulating layer 2421 below the connector 241 and a second insulating layer 2422 above the connector 241.
  • a fifth connecting portion 2424 is formed in the channel 2413a; at the same time, two fourth connecting portions 2423 can be formed on both sides of the connecting member 241 in the second direction Y, so that the two fourth connecting portions 2423 are connected to the first insulating layer 2421 and second insulating layer 2422.
  • the insulating member 242 is injection molded on the connecting member 241 to facilitate processing and manufacturing, and the insulating member 242 and the connecting member 241 are connected stably.
  • the present application also provides a battery cell 20, which includes a casing, an electrode assembly 23, an electrode terminal 21a and the connection assembly 24 described in any of the above solutions.
  • the housing includes a wall part; the electrode assembly 23 is disposed in the housing; the electrode terminal 21a is disposed on the wall part; the first connection part 2411 is connected to the tab 23a of the electrode assembly 23, and the second connection part 2412 is connected to the electrode terminal 21a.
  • the housing may include an end cover 21 and a housing 22 , and the wall part may be the end cover 21 , or the wall part may also be the wall of the housing 22 .
  • the present application also provides a battery 100, which includes the battery cell 20 described in any of the above solutions.
  • the present application also provides an electrical device, which includes the battery 100 described in any of the above solutions.
  • the battery 100 is used to provide electrical energy for the electrical device.
  • the powered device may be any of the aforementioned devices or systems using the battery 100 .
  • connection assembly 24 for the battery cell 20 .
  • the connection assembly 24 includes a connection piece 241 and an insulating piece 242 .
  • the connector 241 includes a first connection part 2411 for connecting the tab 23a of the electrode assembly 23, a second connection part 2412 for connecting the electrode terminal 21a, and a first connection part 2411 and the second connection part 2412.
  • the third connection part 2413 has a fuse part 2414 formed between the first connection part 2411 and the third connection part 2413.
  • the first connection part 2411, the fuse part 2414 and the third connection part 2413 are arranged along the first direction X.
  • the insulating member 242 wraps the fuse part 2414.
  • Insulation parts 242 includes a first insulating layer 2421, a second insulating layer 2422 and two fourth connecting parts 2423.
  • the first insulating layer 2421 is provided on the side of the connecting member 241 facing the electrode assembly 23, and the second insulating layer 2422 is provided on the connecting member 242.
  • two fourth connecting portions 2423 cover at least a portion of two opposite edges of the connecting member 241 along the second direction Y, and the two fourth connecting portions 2423 connect the first insulating layer 2421 and second insulating layer 2422.
  • the maximum distance H4 from the end of the second insulating layer 2422 away from the first connection part 2411 to the fuse part 2414 is greater than the minimum distance H2 from the end of the second connection part 2412 close to the fuse part 2414 to the fuse part 2414 .
  • the insulating component 242 is injection molded on the connecting component 241 .
  • both the first insulation layer 2421 and the second insulation layer 2422 exceed the second connection part 2412 in the first direction X, so that the first insulation layer 2421 faces the electrode assembly 23 on the side of the connection member 241
  • One side has a larger area to enhance the insulation effect of the insulating member 242 on the side of the connecting member 241 facing the electrode assembly 23.
  • the fourth connecting portion 2423 connects the first insulating layer 2421 and the second insulating layer 2422, so that The connection between the insulating member 242 and the connecting member 241 is stable, and the insulating member 242 has a good insulation effect.
  • the connection component 24 is applied to the battery cell 20 and can improve the safety of the battery cell 20 .

Abstract

La présente demande concerne le domaine technique des batteries, et concerne en particulier un ensemble de connexion, un élément de batterie, une batterie et un dispositif électrique. L'ensemble de connexion est utilisé pour un élément de batterie, et l'ensemble de connexion comprend : un élément de connexion, comprenant une première partie de connexion, une deuxième partie de connexion et une troisième partie de connexion utilisée pour connecter la première partie de connexion et la deuxième partie de connexion, une partie de fusion étant formée entre la première partie de connexion et la troisième partie de connexion, et la première partie de connexion, la partie de fusion et la troisième partie de connexion étant agencées dans une première direction ; et un élément isolant, recouvrant la partie de fusion, l'élément isolant comprenant une première couche isolante et une seconde couche isolante, la première couche isolante étant disposée sur le côté de l'élément de connexion faisant face à un ensemble électrode, et la seconde couche isolante étant disposée sur le côté de l'élément de connexion opposé à l'ensemble électrode. Dans la première direction, une distance maximale de l'extrémité de la première couche isolante distante de la première partie de connexion à la partie de fusion est supérieure à une distance minimale de l'extrémité de la seconde partie de connexion proche de la partie de fusion à la partie de fusion. L'ensemble de connexion est appliqué à un élément de batterie et peut améliorer la sécurité de l'élément de batterie.
PCT/CN2023/078799 2022-05-20 2023-02-28 Ensemble de connexion, élément de batterie, batterie et dispositif électrique WO2023221598A1 (fr)

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CN202221231932.3U CN217507612U (zh) 2022-05-20 2022-05-20 连接组件、电池单体、电池及用电设备
CN202221231932.3 2022-05-20

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CN217507612U (zh) * 2022-05-20 2022-09-27 宁德时代新能源科技股份有限公司 连接组件、电池单体、电池及用电设备
WO2024040528A1 (fr) * 2022-08-25 2024-02-29 宁德时代新能源科技股份有限公司 Élément de batterie, batterie et appareil électrique

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WO2017130715A1 (fr) * 2016-01-29 2017-08-03 株式会社 豊田自動織機 Dispositif de stockage d'électricité
CN207542314U (zh) * 2017-12-14 2018-06-26 江苏塔菲尔新能源科技股份有限公司 一种动力电池连接片
CN208507800U (zh) * 2018-05-29 2019-02-15 宁德时代新能源科技股份有限公司 二次电池及其连接组件
CN213583958U (zh) * 2020-12-14 2021-06-29 凯博能源科技有限公司 电池盖板组件及具有其的电池
CN216354657U (zh) * 2021-11-29 2022-04-19 蜂巢能源科技有限公司 用于动力电池的电极组件、盖板组件以及动力电池
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WO2017130715A1 (fr) * 2016-01-29 2017-08-03 株式会社 豊田自動織機 Dispositif de stockage d'électricité
CN207542314U (zh) * 2017-12-14 2018-06-26 江苏塔菲尔新能源科技股份有限公司 一种动力电池连接片
CN208507800U (zh) * 2018-05-29 2019-02-15 宁德时代新能源科技股份有限公司 二次电池及其连接组件
CN213583958U (zh) * 2020-12-14 2021-06-29 凯博能源科技有限公司 电池盖板组件及具有其的电池
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