WO2023133854A1 - Cellule de batterie, batterie, dispositif électrique, et procédé et dispositif de fabrication de cellule de batterie - Google Patents

Cellule de batterie, batterie, dispositif électrique, et procédé et dispositif de fabrication de cellule de batterie Download PDF

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Publication number
WO2023133854A1
WO2023133854A1 PCT/CN2022/072162 CN2022072162W WO2023133854A1 WO 2023133854 A1 WO2023133854 A1 WO 2023133854A1 CN 2022072162 W CN2022072162 W CN 2022072162W WO 2023133854 A1 WO2023133854 A1 WO 2023133854A1
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WO
WIPO (PCT)
Prior art keywords
connection
connection section
section
battery cell
electrode assembly
Prior art date
Application number
PCT/CN2022/072162
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English (en)
Chinese (zh)
Inventor
苏华圣
邢承友
李全坤
王鹏
覃炎运
史恺悦
金海族
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.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/072162 priority Critical patent/WO2023133854A1/fr
Priority to CN202290000376.0U priority patent/CN221328042U/zh
Publication of WO2023133854A1 publication Critical patent/WO2023133854A1/fr

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    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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, in particular to a battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell.
  • the purpose of the present application is to provide a battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell.
  • the battery cell has high safety.
  • the present application provides a battery cell, including: an adapter, including a first connection section for connecting electrode terminals and a second connection section for connecting electrode assemblies, the first connection section and The second connection section is separately arranged and connected to each other, the first connection section is a multi-layer structure and includes multi-layer conductive sheets stacked, and the second connection section is interposed between the multi-layer conductive sheets .
  • the multi-layer conductive sheets are stacked, and the second connecting section is sandwiched between the multi-layer conductive sheets, so that the multi-layer conductive sheets are separately arranged on both sides of the second connecting section.
  • the conductive sheet is connected to one side of the second connecting section
  • the multilayer conductive sheet is connected to the second connecting section from both sides of the second connecting section, and the conductive sheet on each side of the second connecting section
  • the number of layers is small, which is convenient to realize the connection of the multi-layer conductive sheet to the second connecting section from both sides, and reduces the difficulty of connecting the conductive sheet to the second connecting section.
  • the conductive sheet welded on one side of the second connecting section The number of layers is less, which can prevent the conductive sheet and the second connecting section from being welded or connected cracking, causing the conductive sheet far away from the second connecting section to be disconnected from the second connecting section, ensuring the connection between the second connecting section and the multi-layer conductive sheet
  • the connection strength improves the connection reliability between the second connection section and the multi-layer conductive sheet, thereby making the battery cell have higher safety.
  • the number of layers of the conductive sheets located on both sides of the second connecting section is the same.
  • the number of layers of the conductive sheets on both sides of the second connection section is the same, and the difficulty of connecting the conductive sheets on both sides to the second connection section is relatively low, so as to ensure the connection between the multi-layer conductive sheets and the second connection section reliability.
  • the minimum thickness of the second connection section is greater than the maximum thickness of any layer of the conductive sheet in the multi-layer conductive sheet.
  • the thickness of the second connecting section is greater than the thickness of any layer of the conductive sheet in the multi-layer conductive sheet, that is, the thickness of the conductive sheet is relatively thin, which is convenient for bending, so as to reduce the installation space of the adapter and ensure A battery cell has a high energy density.
  • the thicknesses of the conductive sheets of each layer in the multi-layer conductive sheet are equal.
  • the thickness of the conductive sheets of each layer is equal, which facilitates the processing and manufacturing of the conductive sheets and facilitates mass production.
  • two adjacent layers of conductive sheets in the multi-layer conductive sheets are welded or connected by conductive glue.
  • connection method of welding or conductive glue can ensure the conductivity between the multi-layer conductive sheets, so as to ensure the passage of current, and at the same time ensure the connection strength.
  • the second connection section is a single-layer structure.
  • the second connection section has a single-layer structure, so as to ensure the connection reliability between the second connection section and the electrode assembly.
  • the second connection section includes a first surface facing the electrode assembly and a second surface facing away from the electrode assembly, and a part of the multi-layer conductive sheet is connected to the conductive sheet The first surface is welded, and another part of the conductive sheet is welded to the second surface.
  • the multilayer conductive sheet is welded to the first surface and the second surface respectively to ensure the connection strength between the multilayer conductive sheet and the second connection section, and the multilayer conductive sheet is welded on both sides of the second connection section to reduce the The welding difficulty between the multilayer conductive sheet and the second connection section is reduced, and the connection reliability between the multilayer conductive sheet and the second connection section is ensured.
  • the second connection section includes a main body region and a first connection region protruding away from the electrode assembly, the first surface and the second surface are located on the first connection area.
  • the first connection area protrudes in a direction away from the electrode assembly, so that an area for accommodating the conductive sheet is formed between the first connection area and the electrode assembly, ensuring that the multilayer conductive sheet is connected to the first surface and the second surface. , will not affect the assembly connection between the second connection section and the electrode assembly.
  • the second connecting section includes a first connecting area for connecting with the first connecting section and two second connecting areas for connecting with the electrode assembly, the first connecting area A connection area is located between the two second connection areas, and the multi-layer conductive sheet is connected to opposite sides of the first connection area.
  • the first connection area is located between the two second connection areas, and the assembly space is reasonably allocated to ensure that the connection force between the second connection section and the electrode assembly is balanced, and the connection between the first connection section and the second connection section is stable.
  • the second connection section is directly connected to the electrode assembly through the two second connection regions.
  • the second connection section is directly connected to the electrode assembly through the second connection area, which facilitates the transmission of current and ensures the overcurrent capability.
  • the second connection section is welded to the electrode assembly through the two second connection regions.
  • the second connection section and the electrode assembly are welded through two second connection areas to ensure the stability of the connection between the second connection section and the electrode assembly.
  • the second connecting section further includes a main body area, the first connecting area is connected to the main body area, and the second connecting area protrudes from the main body area facing the electrode.
  • the maximum thickness of the first connection zone is smaller than the minimum thickness of the body zone, the maximum thickness of the first connection zone is smaller than the minimum thickness of the smaller thickness of the two second connection zones .
  • the thickness of the first connection area is smaller than the thickness of the main body area and smaller than the thickness of the second connection area, which is convenient to reduce the assembly height of the multi-layer conductive sheet and the second connection section, and reduces the thickness of the first connection section and the second connection section.
  • the space occupation of the assembled structure of the two connecting sections increases the energy density of the battery cell.
  • a surface of the first connecting section close to the electrode assembly is higher than a surface of the second connecting section close to the electrode assembly.
  • the surface of the first connection section close to the electrode assembly is higher than the surface of the second connection section close to the electrode assembly, in other words, the surface of the first connection section close to the electrode assembly is closer to the surface of the second connection section.
  • the surface of the electrode assembly is far away from the electrode assembly, so as to prevent the first connection section from affecting the assembly connection between the second connection section and the electrode assembly, and ensure the reliability of the connection between the second connection section and the electrode assembly.
  • the stiffness of the second connection section is greater than the stiffness of the first connection section.
  • the second connecting section has a relatively high rigidity, so as to ensure the reliability of the connection between the second connecting section and the electrode assembly. Difficulty of bending of two connecting segments.
  • the present application provides a battery, which includes the battery cell in the above embodiment.
  • the present application provides an electric device, which includes the battery cell in the above embodiment, and the battery cell is used to provide electric energy.
  • the present application provides a method for manufacturing a battery cell, which includes: providing an electrode terminal; providing an electrode assembly; providing an adapter, the adapter includes a first connection section and a second connection section, the The first connection section and the second connection section are separately arranged and connected to each other, the first connection section has a multi-layer structure and includes multi-layer conductive sheets stacked, the second connection section has a single-layer structure, The second connection section is sandwiched between the multi-layer conductive sheets; the first connection section is connected to the electrode terminal, and the second connection section is connected to the electrode assembly.
  • the present application provides a battery cell manufacturing equipment, which includes: providing a module for providing an electrode terminal, providing an electrode assembly, and providing an adapter, the adapter includes a first connecting section and a second Two connection sections, the first connection section and the second connection section are separately arranged and connected to each other, the first connection section is a multi-layer structure and includes multi-layer conductive sheets stacked, and the second connection section It is a single-layer structure, the second connection section is sandwiched between the multi-layer conductive sheets; an assembly module is used to connect the first connection section to the electrode terminal, and connect the second connection section connected to the electrode assembly.
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • FIG. 2 is a schematic diagram of an exploded structure of a battery provided in some embodiments of the present application.
  • FIG. 3 is a schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application.
  • Fig. 4 is a schematic diagram of the unfolded state of the adapter provided by some embodiments of the present application.
  • Fig. 5 is a schematic diagram of an exploded structure of an adapter provided in some embodiments of the present application.
  • Fig. 6 is a schematic diagram of the assembly of the first connecting section and the second connecting section provided by some embodiments of the present application;
  • Fig. 7 is a top view of an adapter provided by some embodiments of the present application.
  • Fig. 8 is a sectional view of the A-A direction of Fig. 7;
  • Fig. 9 is a partial enlarged view of place B in Fig. 8;
  • Fig. 10 is a cross-sectional view of a battery cell provided by some embodiments of the present application.
  • Fig. 11 is a schematic diagram of the bending state of the adapter provided by some embodiments of the present application.
  • FIG. 12 is a schematic flowchart of a method for manufacturing a battery cell according to some embodiments of the present application.
  • Fig. 13 is a schematic block diagram of manufacturing equipment for battery cells according to some embodiments of the present application.
  • Marking instructions 100-battery; 101-box; 1011-first part; 1012-second part; 1-battery unit; 11-end cover; 12-housing; 13-electrode assembly; 14-transfer piece; 141-first connecting section; 1410-conductive sheet; 1411-first sub-connecting section; 1412-second sub-connecting section; 1413-third sub-connecting section; 1414-first bending area; 1415-second bending 1416-first bending axis; 1417-second bending axis; 142-second connection section; 1421-first surface; 1422-second surface; 1423-body region; 1424-first connection region; 1425 - second connection area; 1426 - through hole; 15 - electrode terminal; 200 - controller; 300 - motor; 1000 - vehicle.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack, and the like.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative plates.
  • 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 not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer serves as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • 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 protrudes from the current collector coated with the negative electrode active material layer.
  • the current collector coated with the negative electrode active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon.
  • the material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the battery cell also includes an adapter and an electrode terminal, the adapter is used to connect the electrode assembly and the electrode terminal, so as to lead out the electric energy of the electrode assembly through the electrode terminal.
  • the electrode terminal connected to the positive electrode tab is a positive electrode terminal
  • the electrode terminal connected to the negative electrode tab is a negative electrode terminal.
  • the adapter is generally bent in order to reduce the assembly height.
  • the tabs of the electrode assembly are usually flattened, and after the adapter is welded to the tab, the adapter is bent to fit the end cap and the housing together.
  • the adapter For power-type battery cells, the requirements for the internal resistance and overcurrent of the battery cells are relatively high. However, in order to facilitate bending and process welding, the adapter cannot be made too thick, so the flow area is very small.
  • the adapter may include a first connecting section and a second connecting section, the first connecting section is a multi-layer structure and includes a laminated The multi-layer conductive sheet is provided, and the multi-layer conductive sheet is connected to the second connecting section.
  • the current multi-layer conductive sheet is prone to false welding and easy to fall off in the welding area during use.
  • the reason for the current virtual welding is that due to the large number of layers of the multi-layer conductive sheet, the multi-layer conductive sheet is located on one side of the second connecting section, and the welding needs to puncture many layers, so it is easy to cause virtual welding or even part of the conductive sheet and the second connection section.
  • the connecting section is detached, and if the welding power is increased, it will cause the welding edge to crack.
  • connection between the multi-layer conductive sheet and the second connection section is weakly welded, or the edge of the connection between the multi-layer conductive sheet and the second connection section is cracked, which makes the connection reliability between the multi-layer conductive sheet and the second connection section poor, resulting in the transfer
  • the overcurrent capacity of the components is insufficient, and the temperature rise of the adapter is too high, which may easily cause thermal runaway of the battery cells, thereby affecting the safety of the battery cells.
  • the battery cell includes a first The connection section and the second connection section for connecting the electrode assembly, the first connection section and the second connection section are separately arranged and connected to each other, the first connection section has a multi-layer structure and includes multi-layer conductive sheets stacked, and the second The connection section is sandwiched between the multi-layer conductive sheets, and the multi-layer conductive sheets are connected to both sides of the second connection section.
  • the multilayer conductive sheet is stacked, and the second connection section is interposed between the multilayer conductive sheets, so that the multilayer
  • the multi-layer conductive sheet is separately arranged on both sides of the second connecting section, and the multi-layer conductive sheet is connected to the second connecting section from both sides of the second connecting section.
  • the multi-layer conductive sheet is connected to the second connection section from both sides, which reduces the difficulty of connecting the multi-layer conductive sheet to the second connection section.
  • the number of layers of the conductive sheet welded on one side of the second connection section is less.
  • connection reliability between the connecting section and the multi-layer conductive sheet makes the battery cell have higher safety.
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cells disclosed in the embodiments of the present application can be used, but not limited, in electrical equipment such as vehicles, ships, or aircrafts.
  • the battery unit disclosed in this application can be used to form the power supply system of the electrical equipment.
  • the embodiment of the present application provides an electric device that uses a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, Spacecraft and more.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • a vehicle is used as an example to describe an electric device according to an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 , used for the circuit system of the vehicle 1000 , for example, used for starting, navigating, and operating power requirements of the vehicle 1000 .
  • the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is a schematic diagram of an exploded structure of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a case 101 and a battery cell 1 , and the battery cell 1 is housed in the case 101 .
  • the box body 101 is used to provide accommodating space for the battery cell 1 , and the box body 101 can adopt various structures.
  • the box body 101 may include a first part 1011 and a second part 1012, the first part 1011 and the second part 1012 cover each other, the first part 1011 and the second part 1012 jointly define a of accommodation space.
  • the second part 1012 can be a hollow structure with one end open, the first part 1011 can be a plate-shaped structure, and the first part 1011 covers the opening side of the second part 1012, so that the first part 1011 and the second part 1012 jointly define an accommodation space ;
  • the first part 1011 and the second part 1012 can also be hollow structures with one side opening, and the opening side of the first part 1011 is covered by the opening side of the second part 1012 .
  • the battery 100 there may be multiple battery cells 1 , and the multiple battery cells 1 may be connected in series or in parallel or mixed.
  • the mixed connection means that the multiple battery cells 1 are connected in series and in parallel.
  • a plurality of battery cells 1 can be directly connected in series, in parallel or mixed together, and then the whole of the plurality of battery cells 1 is housed in the box 101; of course, the battery 100 can also be a plurality of battery cells 1
  • the battery modules are firstly 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 accommodated in the box 101 .
  • the battery 100 may also include other structures, for example, the battery 100 may also include a current flow component for realizing electrical connection between multiple battery cells 1 .
  • each battery cell 1 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • FIG. 3 is a schematic diagram of an exploded structure of a battery cell 1 provided according to some embodiments of the present application.
  • the battery cell 1 refers to the smallest unit constituting the battery 100 .
  • the battery cell 1 includes an end cap 11 , a casing 12 , an electrode assembly 13 , an adapter 14 and an electrode terminal 15 .
  • the end cap 11 refers to a component that covers the opening of the casing 12 to isolate the internal environment of the battery cell 1 from the external environment.
  • the shape of the end cap 11 can be adapted to the shape of the housing 12 to fit the housing 12 .
  • the end cap 11 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the end cap 11 is not easily deformed when being squeezed and collided, so that the battery cell 1 can have a higher Structural strength and safety performance can also be improved.
  • the end cover 11 may be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold value.
  • the material of the end cap 11 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • an insulator can be provided inside the end cover 11 , and the insulator can be used to isolate the electrical connection components in the housing 12 from the end cover 11 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber or the like.
  • the casing 12 is a component used to cooperate with the end cap 11 to form the internal environment of the battery cell 1 , wherein the formed internal environment can be used to accommodate the electrode assembly 13 , electrolyte and other components.
  • the housing 12 and the end cover 11 can be independent parts, and an opening can be provided on the housing 12 , and the internal environment of the battery cell 1 can be formed by making the end cover 11 cover the opening at the opening.
  • the end cover 11 and the housing 12 can also be integrated. Specifically, the end cover 11 and the housing 12 can form a common connection surface before other components are inserted into the housing. When the inside of the housing 12 needs to be encapsulated , then make the end cover 11 cover the housing 12.
  • the shape of the casing 12 can be determined according to the specific shape and size of the electrode assembly 13 .
  • the housing 12 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • the electrode assembly 13 is a part where the electrochemical reaction occurs in the battery cell 1 .
  • One or more electrode assemblies 13 may be contained within the casing 12 .
  • the electrode assembly 13 is mainly formed by winding a positive pole piece and a negative pole piece, and a separator is usually provided between the positive pole piece and the negative pole piece.
  • the part of the positive pole piece and the negative pole piece with the active material constitutes the main body of the electrode assembly 13 , and the parts of the positive pole piece and the negative pole piece without the active material respectively form tabs.
  • the positive pole tab and the negative pole tab can be located at one end of the main body together or at both ends of the main body.
  • the electrode terminal 15 is disposed on the end cap 11 , and the electrode terminal 15 is electrically connected to the electrode assembly 13 through the adapter 14 for outputting or inputting electric energy of the battery cell 1 .
  • Figure 4 is a schematic diagram of the unfolded state of the adapter 14 provided by some embodiments of the present application
  • Figure 5 is a schematic diagram of the exploded structure of the adapter 14 provided by some embodiments of the present application
  • Figure 6 is a schematic diagram of this application
  • the assembly diagram of the first connection section 141 and the second connection section 142 provided in some embodiments of the application.
  • the present application provides a battery cell 1 . As shown in FIGS.
  • the battery cell 1 includes an adapter 14 , and the adapter 14 includes a first connection section 141 for connecting the electrode terminal 15 and a second connection section 142 for connecting the electrode assembly 13 , the first connection section 141 and the second connection section 142 are separately arranged and connected to each other, the first connection section 141 is a multi-layer structure and includes a multi-layer conductive sheet 1410 stacked, and the second connection section 142 is sandwiched between the multi-layer conductive sheets. Between slices 1410.
  • the adapter 14 is a component for realizing the electrical connection between the electrode terminal 15 and the electrode assembly 13 .
  • the conductive sheet 1410 is a sheet structure with conductive properties, and the conductive sheet 1410 is electrically connected with the second connection section 142 to realize the transmission of electric energy.
  • the conductive sheet 1410 may be a metal sheet (for example, aluminum, copper or other conductive metals), which has good electrical conductivity, so as to conduct the electric energy of the electrode assembly 13 .
  • Conductive sheet 1410 can also be non-metallic conductive sheet 1410, such as graphite sheet, conductive ceramic sheet.
  • the multi-layer conductive sheets 1410 are stacked so as to increase the flow area through the multi-layer conductive sheets 1410 , thereby improving the flow capacity of the adapter 14 .
  • the second connection section 142 is interposed between the multilayer conductive sheets 1410.
  • the multilayer conductive sheet 1410 clamps the second connection section 142, and the multilayer conductive sheet 1410 is connected to both sides of the second connection section 142.
  • the layer conductive sheet 1410 is respectively connected to the second connection section 142 on both sides of the second connection section 142 .
  • the multilayer conductive sheet 1410 is connected to the second connection section from both sides of the second connection section 142 142, the number of layers of the conductive sheet 1410 on each side of the second connecting section 142 is small, which reduces the difficulty of connecting the multi-layer conductive sheet 1410 and the second connecting section 142.
  • the number of layers of the sheet 1410 is small, which can prevent the conductive sheet 1410 and the second connection section 142 from being welded or connected cracked, causing the conductive sheet 1410 far away from the second connection section 142 to be disconnected from the second connection section 142, so as to facilitate the realization of multi-layer
  • the connection of the conductive sheet 1410 to the second connection section 142 from both sides ensures the connection strength between the second connection section 142 and the multilayer conductive sheet 1410, improves the connection reliability between the second connection section 142 and the multilayer conductive sheet 1410, and further This makes the battery cell 1 have higher safety.
  • the number of layers of the conductive sheet 1410 located on both sides of the second connection section 142 is the same.
  • the multilayer conductive sheet 1410 is respectively connected to both sides of the second connection section 142, and the number of layers of the conductive sheet 1410 on both sides of the second connection section 142 is the same, that is, the multilayer conductive sheet 1410 and the second connection section 142
  • the number of layers of conductive sheets 1410 connected on each side is the same, in other words, the connection difficulty between the conductive sheets 1410 on both sides of the second connecting section 142 and the second connecting section 142 is the same.
  • the number of layers of the conductive sheets 1410 on both sides of the second connecting section 142 is the same, and the difficulty of connecting the conductive sheets 1410 on both sides to the second connecting section 142 is reduced, so as to ensure the connection between the multilayer conductive sheets 1410 and the second connecting section 142 reliability.
  • the minimum thickness of the second connecting segment 142 is greater than the maximum thickness of any layer of the conductive sheet 1410 in the multi-layer conductive sheet 1410 .
  • the minimum thickness of the second connection section 142 means that when the second connection section 142 is a non-uniform thickness structure, the thickness value at the minimum thickness of the second connection section 142 is the minimum thickness of the second connection section 142; When the connecting section 142 has a uniform thickness structure, the thickness value at any position of the second connecting section 142 is the maximum thickness of the second connecting section 142 .
  • the maximum thickness of any layer of conductive sheet 1410 in the multilayer conductive sheet 1410 refers to the thickness of the region where the thickness of any layer of conductive sheet 1410 in the multilayer conductive sheet 1410 is the largest, or, when the thickness of the multilayer conductive sheet 1410 is inconsistent , the thickness of the conductive sheet 1410 with the largest thickness among the multi-layer conductive sheets 1410 .
  • the minimum thickness of the second connection section 142 is greater than the maximum thickness of any layer of conductive sheet 1410 in the multilayer conductive sheet 1410. It is thinner, reduces the bending difficulty of the first connecting section 141, facilitates the bending of the first connecting section 141, reduces the height of the adapter 14 after bending, reduces the installation space of the adapter 14, and facilitates the bending of the first connecting section 141.
  • the energy density of the battery cell 1 is guaranteed.
  • the thickness of each layer of the conductive sheet 1410 in the multi-layer conductive sheet 1410 is equal.
  • the multi-layer conductive sheets 1410 adopt the same thickness, which facilitates the processing and manufacturing of the conductive sheets 1410, facilitates mass production, and reduces processing costs.
  • the thickness of each layer of conductive sheet 1410 in the multilayer conductive sheet 1410 may also be unequal. According to different usage requirements, the multilayer conductive sheet 1410 is designed as conductive sheet 1410 with different thickness specifications.
  • two adjacent layers of conductive sheets 1410 in the multi-layer conductive sheets 1410 are welded or connected by conductive glue.
  • connection method of welding or conductive glue can ensure the conductivity between the multi-layer conductive sheets 1410 to ensure the passage of current and also ensure the connection strength.
  • two adjacent layers of conductive sheets 1410 are laser welded, so that the two adjacent layers of conductive sheets 1410 have better connection stability and can also ensure the passage of current.
  • connection method of two adjacent layers of conductive sheets 1410 may also be other methods that can realize metal connection, such as riveting, bolt connection and the like.
  • the second connection section 142 is a single-layer structure.
  • the second connection section 142 has a single-layer structure, so as to ensure the reliability of the connection between the second connection section 142 and the electrode assembly 13 .
  • the second connecting section 142 may be disc-shaped, the size of the second connecting section 142 is basically consistent with the size of the end surface of the electrode assembly 13, and the second connecting section 142 has a larger contact with the electrode assembly 13 Therefore, the thickness of the second connection section 142 can be smaller than the minimum thickness of the multilayer conductive sheet 1410, and the second connection section 142 does not need to be thickened or arranged in a multilayer structure.
  • the second connection section 142 includes a first surface 1421 facing the electrode assembly 13 (see FIG. 3 ) and a second surface 1422 facing away from the electrode assembly 13, and the multilayer conductive A part of the conductive sheet 1410 in the sheet 1410 is welded to the first surface 1421 , and another part of the conductive sheet 1410 is welded to the second surface 1422 .
  • the first surface 1421 and the second surface 1422 are two opposite surfaces in the thickness direction of the second connection section 142 , the first surface 1421 is the surface facing the electrode assembly 13 in the thickness direction of the second connection section 142 , and the second surface 1422 is the surface of the second connecting section 142 facing away from the electrode assembly 13 in the thickness direction.
  • Part of the conductive sheet 1410 in the multilayer conductive sheet 1410 is welded to the first surface 1421, and another part of the conductive sheet 1410 is welded to the second surface 1422.
  • the multilayer conductive sheet 1410 is welded to the first surface 1421 and the second surface respectively. 1422, so as to realize the conductive connection between the multi-layer conductive sheet 1410 and the second connecting segment 142.
  • the multilayer conductive sheet 1410 is welded to the first surface 1421 and the second surface 1422 respectively to ensure the connection strength between the multilayer conductive sheet 1410 and the second connection section 142, and the multilayer conductive sheet 1410 is welded on both sides of the second connection section 142 , reducing the difficulty of welding the multilayer conductive sheet 1410 and the second connection section 142 , and ensuring the reliability of the connection between the multilayer conductive sheet 1410 and the second connection section 142 .
  • FIG. 7 is a top view of the adapter 14 provided by some embodiments of the present application
  • FIG. 8 is a cross-sectional view along the A-A direction of FIG. 7
  • FIG. 9 is a partial enlarged view of B in FIG. 8 .
  • the second connection section 142 includes a main body region 1423 and a first connection region 1424 protruding away from the electrode assembly 13 (see FIG. 3 ).
  • the first surface 1421 and the second surface 1422 are located in the first connection area 1424 .
  • the main body area 1423 is the base part of the second connecting section 142, the first connecting area 1424 is connected to the main body area 1423, and the first connecting area 1424 protrudes away from the electrode assembly 13 relative to the main body area 1423, so that the first connecting area 1424
  • the surface close to the electrode assembly 13 of the main body region 1423 is farther away from the electrode assembly 13 than the surface close to the electrode assembly 13 of the body region 1423 .
  • the first surface 1421 and the second surface 1422 are located in the first connection area 1424, the first surface 1421 and the second surface 1422 protrude from the main body area 1423 in the direction away from the electrode assembly 13, and the first connection area 1424 and the electrode assembly 13 are formed
  • the area for accommodating the conductive sheet 1410 ensures that after the multilayer conductive sheet 1410 is connected to the first surface 1421 and the second surface 1422 , it will not affect the assembly and connection of the second connection section 142 and the electrode assembly 13 .
  • the first connection region 1424 is located between the two second connection regions 1425 , and the multilayer conductive sheet 1410 is connected to opposite sides of the first connection region 1424 .
  • the first connection area 1424 is located between the two second connection areas 1425, and the assembly space is allocated reasonably. On the one hand, it ensures that the connection force between the second connection section 142 and the electrode assembly 13 is balanced, and on the other hand, it ensures that the first connection section 141 The connection with the second connecting section 142 is stable.
  • the second connection section 142 is directly connected to the electrode assembly 13 through two second connection regions 1425 .
  • the second connection section 142 is directly connected to the electrode assembly 13 through two second connection areas 1425.
  • the second connection area 1425 is the area of the second connection section 142 for connecting the electrode assembly 13.
  • the second connection area 1425 realizes the second The connection section 142 is electrically connected to the electrode assembly 13 .
  • the second connection section 142 is directly connected to the electrode assembly 13 through the second connection area 1425 , which facilitates the transmission of current and ensures the overcurrent capability.
  • the second connection section 142 is welded to the electrode assembly 13 through two second connection regions 1425 .
  • the second connection section 142 is welded to the electrode assembly 13 through two second connection areas 1425 to ensure the stability of the connection between the second connection section 142 and the electrode assembly 13 and ensure the overcurrent capability.
  • the second connection section 142 further includes a body region 1423 , the first connection region 1424 is connected to the body region 1423 , and the second connection region 1425 protrudes from the body region 1423
  • the maximum thickness of the first connection region 1424 is smaller than the minimum thickness of the main body region 1423, and the maximum thickness of the first connection region 1424 is smaller than the minimum thickness of the smaller one of the two second connection regions 1425 .
  • the first connection area 1424 can be formed by reducing the thickness of the second connection section 142, and under the condition of ensuring the connection between the first connection section 141 and the first connection area 1424, reduce the thickness of the first connection area 1424 as much as possible, in other words In other words, the first connection region 1424 may be the thinnest part of the second connection section 142 .
  • the assembled thickness of the first connecting section 141 and the first connecting area 1424 is thinner than the assembled thickness of the first connecting section 141 and the main body area 1423 and the second connecting area 1425 , the first connecting section 141 and the second connecting section 142
  • the space occupied after assembly is small, and the energy density of the battery cell 1 is improved.
  • the second connection area 1425 protrudes toward the electrode assembly 13 relative to the main body area 1423 to ensure the contact between the second connection area 1425 and the electrode assembly 13 and the welding quality between the second connection area 1425 and the electrode assembly 13 .
  • connection area 1425 In order to ensure that the second connection area 1425 is connected to both the inner and outer pole pieces of the winding structure of the electrode assembly 13, as shown in FIG. In the center, two second connection areas 1425 are arranged opposite to each other, so as to ensure that the connection force between the second connection section 142 and the electrode assembly 13 is balanced.
  • the first connection zone 1424 is located between the two second connection zones 1425, and the profile of the first connection zone 1424 matches the profile of the two second connection zones 1425, so as to ensure that the first connection section 141 and the second connection section 142 have
  • the larger contact area is convenient to ensure the connection stability between the first connecting section 141 and the second connecting section 142 .
  • the connecting part of the first connecting section 141 and the second connecting section 142 is a trapezoidal structure.
  • the main body area 1423 of the second connection section 142 is provided with a through hole 1426.
  • the through hole 1426 is aligned with the winding center hole of the electrode assembly 13 to realize the assembly positioning of the second connection section 142 and the electrode assembly 13; at the same time, when injecting the electrolyte It is convenient for the electrolyte to contact the electrode assembly 13 after passing through the through hole 1426 to infiltrate the electrode assembly 13 , and the air in the electrode assembly 13 or the gas after the chemical reaction of the electrolyte can be discharged through the through hole 1426 .
  • multiple through holes 1426 may be provided, and may be distributed in other positions of the main body region 1423 in addition to being disposed in the middle of the second connecting section 142 .
  • FIG. 10 is a cross-sectional view of a battery cell 1 provided by some embodiments of the present application.
  • the surface of the first connecting section 141 close to the electrode assembly 13 is higher than the surface of the second connecting section 142 close to the electrode assembly 13 .
  • the surface of the second connection section 142 close to the electrode assembly 13 is the surface where the second connection section 142 is connected to the electrode assembly 13 .
  • the surface of the first connection section 141 close to the electrode assembly 13 is higher than the surface of the second connection section 142 close to the electrode assembly 13 means that the surface of the first connection section 141 close to the electrode assembly 13 is closer to the second connection section 142
  • the surface of the electrode assembly 13 is far away from the electrode assembly 13, in other words, the first connection section 141 is far away from the electrode assembly 13 relative to the second connection section 142, so that the first connection section 141 does not contact the electrode assembly 13, and the first connection section 141 There may be a gap with the electrode assembly 13 .
  • the first connection section 141 is far away from the electrode assembly 13 relative to the second connection section 142, and when the second connection section 142 is connected to the electrode assembly 13, it can prevent the first connection section 141 from affecting the assembly connection between the second connection section 142 and the electrode assembly 13 , to ensure the reliability of the connection between the second connection section 142 and the electrode assembly 13 .
  • the rigidity of the second connecting section 142 is greater than that of the first connecting section 141 .
  • the stiffness of the second connecting section 142 is greater than that of the first connecting section 141 , in other words, the first connecting section 141 is easier to bend than the second connecting section 142 .
  • the first connecting section 141 Since the first connecting section 141 has a certain length, during the assembly process of the battery cell 1, after the connection between the adapter 14 and the electrode assembly 13 and the electrode terminal 15 is completed, when the end cover 11 and the casing 12 are assembled, The space occupied by the adapter piece 14 can be reduced by bending the first connecting section 141 .
  • the rigidity of the first connecting section 141 is small, which can reduce the difficulty of bending the first connecting section 141 relative to the second connecting section 142 , and facilitate the bending of the first connecting section 141 .
  • the second connection section 142 has high rigidity, so as to ensure the connection reliability between the second connection section 142 and the electrode assembly 13 .
  • FIG. 11 is a schematic diagram of the bending state of the adapter 14 provided by some embodiments of the present application.
  • the first connection section 141 includes a first sub-connection section 1411, a second sub-connection section 1412 and a third sub-connection section 1413, and the first sub-connection section 1411 is used to communicate with The second connection section 142 is connected, the third sub-connection section 1413 is used to connect with the electrode terminal 15 , and the second sub-connection section 1412 is connected to the first sub-connection section 1411 and the third sub-connection section 1413 .
  • the first sub-connection section 1411 and the third sub-connection section 1413 are located at the two ends of the second sub-connection section 1412, after the adapter piece 14 is bent , the first sub-connection section 1411 and the third sub-connection section 1413 are respectively located on both sides of the second sub-connection section 1412 in the thickness direction.
  • the first connecting section 141 is bent into an S shape.
  • the second sub-connection section 1412 is bent relative to the first sub-connection section 1411 around the first bending axis 1416 (see FIG.
  • the second sub-connecting section 1412 is bent around a second bending axis 1417 (see FIG. 7 ) to form a second bending region 1415 .
  • the first connecting section 141 has an opposite first surface and a second surface.
  • the first connecting section 141 is in an S-shaped bending form.
  • the first surface is located at the inner circle of the first bending zone 1414.
  • the second surface is located at the outer ring of the first bending area 1414, the bending radius of the conductive sheet 1410 close to the first surface is small, and the bending radius of the conductive sheet 1410 close to the second surface is large;
  • the first surface is located at the outer circle of the second bending zone 1415, and the second surface is located at the inner circle of the second bending zone 1415.
  • the bending radius of the conductive sheet 1410 on the surface is relatively small.
  • each layer of conductive sheet 1410 is bent twice, the bending extension of each layer of conductive sheet 1410 is the same, that is, the edges of both ends of each layer of conductive sheet 1410 are flush, and on the one hand, each layer of the first connecting section 141
  • the layered conductive sheet 1410 is evenly stressed and is not prone to breakage.
  • the height of the first connecting section 141 after bending is controlled to ensure the energy density of the battery cell 1 and avoid delamination in the multilayer structure, and the inner layer Wrinkles are prone to occur, which in turn leads to an increase in height after bending, occupying installation space and making it inconvenient to assemble the battery cell 1 .
  • the present application also provides a battery 100, which includes the battery cell 1 described in any one of the solutions above.
  • the present application also provides an electric device, which includes the battery cell 1 described in any solution above, and the battery cell 1 is used to provide electric energy for the electric device.
  • the electric device may be any of the aforementioned devices or systems using the battery cell 1 .
  • the present application provides a battery cell 1 , which is a cylindrical battery cell, which includes an end cap 11 , a casing 12 , and an electrode assembly 13 , the adapter 14 and the electrode terminal 15 .
  • the housing 12 has an opening, and the end cap 11 is disposed on the opening of the housing 12 .
  • the electrode assembly 13 is arranged in the housing 12 , and the electrode terminal 15 is arranged in the end cap 11 .
  • the adapter 14 includes a first connection section 141 for connecting the electrode terminal 15 and a second connection section 142 for connecting the electrode assembly 13, the first connection section 141 and the second connection section 142 are separately arranged and electrically connected to each other,
  • the first connection segment 141 is a multi-layer structure and includes multi-layer conductive sheets 1410 stacked, and the second connection segment 142 is sandwiched between the multi-layer conductive sheets 1410 .
  • the second connecting section 142 includes a first surface 1421 facing the electrode assembly 13 and a second surface 1422 facing away from the electrode assembly 13, the multilayer conductive sheet 1410 A part of the conductive sheet 1410 is welded to the first surface 1421 , and another part of the conductive sheet 1410 is welded to the second surface 1422 .
  • the multilayer conductive sheets 1410 are respectively welded on both sides of the second connection section 142, and the number of layers of the conductive sheets 1410 on both sides of the second connection section 142 is relatively low, so that the second The welding difficulty between the conductive sheet 1410 on each side of the connecting section 142 and the second connecting section 142 is reduced, so as to improve the connection reliability between the multilayer conductive sheet 1410 and the second connecting section 142 .
  • FIG. 12 shows a schematic flow chart of a method for manufacturing a battery cell 1 according to some embodiments of the present application. As shown in FIG. 12, the manufacturing method of the battery cell 1 may include:
  • the adapter 14 includes a first connecting section 141 and a second connecting section 142, the first connecting section 141 and the second connecting section 142 are separately arranged and connected to each other, and the first connecting section 141 is multiple Layer structure and includes multi-layer conductive sheets 1410 stacked, the second connection section 142 is a single-layer structure, and the second connection section 142 is sandwiched between the multi-layer conductive sheets 1410;
  • step “S401, providing electrode terminal 15", step “S402, providing electrode assembly 13", and step “S403, providing adapter 14" is not unique, and in some embodiments, they can be performed sequentially Step “S402, provide the electrode assembly 13", step “S401, provide the electrode terminal 15" and step “S403, provide the adapter 14", or step “S403, provide the adapter 14", “S402 , provide the electrode assembly 13" and step “S401, provide the electrode terminal 15"; the application for the step “S401, provide the electrode terminal 15", step “S402, provide the electrode assembly 13" and step “S403, provide the adapter 14"
  • the order of is not limited.
  • FIG. 13 shows a schematic block diagram of a battery cell manufacturing device 500 according to some embodiments of the present application.
  • the battery cell manufacturing equipment 500 may include a providing module 501 and an assembling module 502 .
  • the providing module 501 is used for providing the electrode terminal 15 , providing the electrode assembly 13 and providing the adapter 14 .
  • the adapter 14 includes a first connecting section 141 and a second connecting section 142.
  • the first connecting section 141 and the second connecting section 142 are separately arranged and connected to each other.
  • the first connecting section 141 is a multilayer structure and includes multiple
  • the layered conductive sheet 1410 and the second connecting section 142 are a single-layer structure, and the second connecting section 142 is sandwiched between the multi-layered conductive sheets 1410 .
  • the assembly module 502 is used for connecting the first connecting section 141 to the electrode terminal 15 and connecting the second connecting section 142 to the electrode assembly 13 .
  • the battery cell 1 with high safety can be manufactured through the manufacturing equipment.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Des modes de réalisation de la présente demande concernent une cellule de batterie, une batterie, un dispositif électrique, et un procédé ainsi qu'un dispositif de fabrication de la cellule de batterie, qui appartiennent au domaine technique des batteries. La cellule de batterie selon la présente demande comprend un adaptateur, qui comprend une première section de connexion pour connecter une borne d'électrode et une seconde section de connexion pour connecter un ensemble électrode. La première section de connexion et la seconde section de connexion sont agencées de manière divisée et connectées l'une à l'autre. La première section de connexion a une structure multicouche et comprend de multiples couches de pièces conductrices qui sont empilées. La seconde section de connexion est serrée entre les multiples couches de pièces conductrices. La cellule de batterie présente une sécurité élevée.
PCT/CN2022/072162 2022-01-14 2022-01-14 Cellule de batterie, batterie, dispositif électrique, et procédé et dispositif de fabrication de cellule de batterie WO2023133854A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2022/072162 WO2023133854A1 (fr) 2022-01-14 2022-01-14 Cellule de batterie, batterie, dispositif électrique, et procédé et dispositif de fabrication de cellule de batterie
CN202290000376.0U CN221328042U (zh) 2022-01-14 2022-01-14 电池单体、电池、用电设备、电池单体的制造设备

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PCT/CN2022/072162 WO2023133854A1 (fr) 2022-01-14 2022-01-14 Cellule de batterie, batterie, dispositif électrique, et procédé et dispositif de fabrication de cellule de batterie

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015115641A1 (fr) * 2014-02-03 2015-08-06 新神戸電機株式会社 Structure de connexion pour collecteur et condensateur pourvu d'une structure de connexion
CN205488319U (zh) * 2016-01-25 2016-08-17 宁德时代新能源科技股份有限公司 一种连接片结构及具有该连接片结构的电池组
JP2016175095A (ja) * 2015-03-19 2016-10-06 日立化成株式会社 超音波溶接方法
CN209401722U (zh) * 2019-02-25 2019-09-17 宁德时代新能源科技股份有限公司 二次电池
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
CN211428260U (zh) * 2019-12-30 2020-09-04 蜂巢能源科技有限公司 连接片及具有其的电芯和车辆
CN112821011A (zh) * 2021-02-24 2021-05-18 东莞市骅新电子科技有限公司 一种新能源电池搭接焊软连接片的生产工艺及其制品

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015115641A1 (fr) * 2014-02-03 2015-08-06 新神戸電機株式会社 Structure de connexion pour collecteur et condensateur pourvu d'une structure de connexion
JP2016175095A (ja) * 2015-03-19 2016-10-06 日立化成株式会社 超音波溶接方法
CN205488319U (zh) * 2016-01-25 2016-08-17 宁德时代新能源科技股份有限公司 一种连接片结构及具有该连接片结构的电池组
CN209401722U (zh) * 2019-02-25 2019-09-17 宁德时代新能源科技股份有限公司 二次电池
CN211428260U (zh) * 2019-12-30 2020-09-04 蜂巢能源科技有限公司 连接片及具有其的电芯和车辆
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
CN112821011A (zh) * 2021-02-24 2021-05-18 东莞市骅新电子科技有限公司 一种新能源电池搭接焊软连接片的生产工艺及其制品

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