Battery monomer, battery and electric equipment

Abstract

The present disclosure relates to a battery cell comprising: a bare cell; the wall of the shell forms an accommodating cavity and comprises a first end part and a second end part, the naked battery core is accommodated in the accommodating cavity, and the shell further comprises a joint part positioned between the first end part and the second end part; and the end cover is arranged at at least one of the first end part and the second end part. The utility model also relates to a battery and electric equipment. Therefore, the battery monomer which is simple and effective in structure, relatively low in production and manufacturing cost and capable of ensuring the air tightness of the battery cell can be provided.

Description

Technical Field

[0001] This disclosure relates to a battery cell, a battery, and an electrical device. More specifically, this disclosure relates to a cylindrical pouch cell. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] For batteries, there is a continuous need for modifications to reduce their production and manufacturing costs. Utility Model Content

[0004] In view of the above problems, this disclosure provides a single battery cell, comprising:

[0005] Bare battery cells;

[0006] The housing has walls forming a receiving cavity and includes a first end and a second end, the bare battery cell being received in the receiving cavity, and the housing also includes a joint located between the first end and the second end;

[0007] An end cap is disposed at at least one of the first end and the second end.

[0008] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0009] According to one or more aspects of this disclosure, the joint extends along the entire longitudinal direction of the housing.

[0010] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0011] According to one or more aspects of this disclosure, at the joint, the walls of the housing overlap and engage with each other.

[0012] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0013] According to one or more aspects of this disclosure, at the joint, the walls of the housing overlap and are fused together.

[0014] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0015] According to one or more aspects of this disclosure, the housing is formed in a cylindrical shape.

[0016] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0017] According to one or more aspects of this disclosure, the wall of the housing is an aluminum-plastic film.

[0018] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0019] According to one or more aspects of this disclosure, the battery cell further includes a tab that is welded to the bare cell.

[0020] According to one or more aspects of this disclosure, the battery cell further includes pins, the pins including leads and connections, the connections being for connection to the tabs.

[0021] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0022] According to one or more aspects of this disclosure, the connecting portion is integral with the lead-out portion and extends at an angle relative to the lead-out portion.

[0023] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0024] According to one or more aspects of this disclosure, the connecting portion includes a first connecting portion and a second connecting portion extending in opposite directions relative to the lead-out portion.

[0025] This allows for a more stable connection between the connector and the tab.

[0026] According to one or more aspects of this disclosure, the pins are formed in a plate shape.

[0027] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0028] According to one or more aspects of this disclosure, the end cap is formed by two identical half-end caps, each half-end cap including a bottom wall and a side wall.

[0029] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0030] According to one or more aspects of this disclosure, the connection portion of the pin is located between the bottom wall of the half end cap and the bare cell, and the lead-out portion of the pin is connected between the side wall of one half end cap and the side wall of the other half end cap.

[0031] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0032] According to one or more aspects of this disclosure, the pin further includes a cover covering a portion of the pin's lead-out portion, the cover being connected between a sidewall of one half end cap and a sidewall of the other half end cap.

[0033] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0034] According to one or more aspects of this disclosure, the end cap is formed in a cylindrical shape, and the half end cap is formed in a semi-cylindrical shape, and the sidewalls of the half end cap include semi-circular sidewalls and rectangular sidewalls.

[0035] Therefore, a battery cell with a simple and effective structure, low production and manufacturing costs, and the ability to ensure the airtightness of the cell can be provided.

[0036] According to one or more aspects of this disclosure, the end cap is an aluminum-plastic film.

[0037] This disclosure also provides a battery comprising a battery cell according to any of the foregoing aspects, wherein the lead-out portions of the battery cell are connected to a busbar of the battery.

[0038] An electrical appliance comprising a battery according to the foregoing aspects.

[0039] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 These are schematic diagrams of the vehicle structure according to some embodiments of this disclosure;

[0042] Figure 2 This is an exploded structural diagram of a battery for a vehicle according to some embodiments of this disclosure;

[0043] Figure 3 These are schematic diagrams of the structure of a battery cell according to some embodiments of this disclosure;

[0044] Figure 4 This is a schematic diagram of the casing of a battery cell according to some embodiments of this disclosure;

[0045] Figure 5 These are schematic diagrams and cross-sectional views of the end caps of battery cells according to some embodiments of this disclosure;

[0046] Figure 6 This is a schematic diagram of the structure of a battery cell according to some embodiments of this disclosure, wherein the casing is omitted;

[0047] Figure 7 This is a schematic diagram of the pin structure of a battery cell according to some embodiments of this disclosure;

[0048] The reference numerals in the detailed embodiments are as follows:

[0049] 1000 vehicles;

[0050] Battery 100, controller 200, motor 300;

[0051] Battery housing 10, first part 11, second part 12, battery cell 20;

[0052] 21. Housing 21, end cap 22, pin 23, electrode 24, bare cell 25;

[0053] Wall 210, receiving cavity 211, first end 212, second end 213, joint 214;

[0054] Bottom wall 220, side wall 221, rectangular side wall 2210, semi-circular side wall 2211;

[0055] Lead-out portion 230, connecting portion 231, first connecting portion 2310, second connecting portion 2311, covering portion 232; Detailed Implementation

[0056] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and foregoing description of the drawings of this disclosure are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the description of the embodiments of this disclosure, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0062] In the description of the embodiments of this disclosure, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0063] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0064] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0065] For electric vehicle batteries, there is a continuous need for modifications to reduce their production and manufacturing costs. Based on this need, this disclosure provides a battery cell comprising: a bare cell; a housing, the walls of which form a receiving cavity and include a first end and a second end, the bare cell being housed within the receiving cavity, the housing further including a joint located between the first end and the second end; and an end cap disposed at at least one of the first end and the second end. The housing structure formed by this disclosure enables a reduction in battery production and manufacturing costs. Further, in this disclosure, the battery cell is a cylindrical battery cell, the walls are made of aluminum-plastic film, and the joint is a welded portion formed by fusing overlapping aluminum-plastic films.

[0066] Specifically, this disclosure provides a cylindrical pouch cell, which is assembled using a pouch method to form the aforementioned structure of this disclosure. This disclosure reduces the production and manufacturing costs of cylindrical battery cells while maintaining good sealing performance. It should be understood that this disclosure is not limited to cylindrical battery cells, but can also be applied to other battery cells, such as rectangular or oriented battery cells.

[0067] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this disclosure.

[0068] Please refer to Figure 1 , Figure 1This is a structural schematic diagram of a vehicle 1000 provided for some embodiments of the present disclosure. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A power supply device 100 is provided inside the vehicle 1000, and the power supply device 100 can be located at the bottom, front, or rear of the vehicle 1000. The power supply device 100 can be used to supply power to the vehicle 1000; for example, the power supply device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the power supply device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0069] In some embodiments of this disclosure, the power supply device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0070] See Figure 2 The power supply device 100 includes a battery housing 10 and batteries, with the batteries housed within the battery housing 10. The battery housing provides space for the batteries, and the battery housing 10 can have various structures. In some embodiments, the housing may include a first portion 10 and a second portion 11, which overlap each other, defining a space for housing the batteries. In the power supply device 100, there may be multiple batteries, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple batteries are connected in both series and parallel configurations. Multiple batteries can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the batteries is housed within the battery housing 10. Alternatively, the power supply device 100 may consist of multiple batteries first connected in series, parallel, or a combination thereof to form battery modules, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is then housed within the housing. The power supply device 100 may also include other structures; for example, it may include a busbar (e.g., a galvanic plate) for electrical connection between the multiple batteries. Furthermore, as... Figure 2 As shown, the battery includes multiple battery cells 20.

[0071] refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a battery cell 20 according to some embodiments of the present disclosure is shown. Figure 4A schematic diagram of the housing 21 of a battery cell 20 according to some embodiments of the present disclosure is shown. The battery cell 20 includes a bare cell 25; a housing 21, the wall 210 of which forms a receiving cavity 211 and includes a first end 212 and a second end 213, the bare cell 25 being housed within the receiving cavity 211, the housing 21 further including a joint 214 located between the first end 212 and the second end 213; and an end cap 22 disposed at at least one of the first end 212 and the second end 213.

[0072] In this disclosure, the structure of the housing 21 is achieved by winding the walls of the housing and forming joints 214 at the overlapping walls. The resulting housing 21 has a receiving cavity 211 for accommodating the bare battery cell 25 and other structures such as end caps 22. The battery cell 20 with this structure can significantly reduce production and manufacturing costs.

[0073] Continue to refer to Figure 4 In this embodiment of the present disclosure, the joint 214 extends along the entire longitudinal direction of the housing 21. In this embodiment, the longitudinal direction is the direction from the first end 212 to the second end 213. When the housing is cylindrical, the longitudinal direction is the direction along the central axis of the cylinder. The receiving cavity 211 is open at the first end 212 and the second end 213, i.e., in communication with the external environment, so that other components can be inserted into the receiving cavity 211 from either end. It should be understood that the receiving cavity 211 may also be closed at one of its ends, i.e., a joint is formed at the end in addition to the joint 214.

[0074] This facilitates the subsequent formation of a complete sealed structure, preventing issues such as leakage.

[0075] Continue to refer to Figure 3 At the joint 214, the walls 210 of the housing 21 overlap and join together. In this embodiment, if the walls 210 other than the joint 214 are considered as a single-layer structure, the wall at the joint 214 is a double-layer structure, that is, the two opposite ends of the wall 210 in the circumferential direction in the figure overlap each other. And the overlapping double-layer walls are joined together to form the housing 21.

[0076] This makes the structure of the casing and therefore the battery cell simple and efficient, resulting in lower production and manufacturing costs.

[0077] Continue to refer to Figure 3At the joint 214, the walls 210 of the housing 21 overlap and are fused together. In this embodiment, fusion welding can be used to join the double walls. That is, the walls 210 can be made of a weldable material, such as aluminum-plastic film. It should be understood that this disclosure is not limited thereto; for example, adhesive bonding or welding can also be used to join the double walls together.

[0078] By employing welding, the manufacturing process can be simplified, resulting in a simple and efficient structure for the casing and therefore the battery cells, leading to lower production and manufacturing costs.

[0079] Continue to refer to Figure 3 The housing 21 is formed in a cylindrical shape. The cylindrical housing can be formed by winding a sheet, and the wound sheet is welded together at the ends as previously described, thus reducing production and manufacturing costs.

[0080] In this disclosure, the wall 210 of the housing 21 can be an aluminum-plastic film.

[0081] Reference Figure 5 and Figure 6 , Figure 5 These are schematic diagrams and cross-sectional views of the end caps of battery cells according to some embodiments of this disclosure. Figure 6 This is a schematic diagram of the structure of a battery cell according to some embodiments of this disclosure, wherein the casing is omitted. The battery cell 20 also includes tabs 24, which are welded to the bare cell 25. The resulting battery cell has a compact structure.

[0082] Continue to refer to Figure 6 The battery cell 20 also includes pins 23, each pin including a lead-out portion 230 and a connecting portion 231, the connecting portion 231 being used to connect to the tab 24. For example, the connecting portion 231 can be soldered to the tab 24. This makes the resulting battery cell compact and easy to assemble into the housing 21.

[0083] The connecting portion 231 is integral with the lead-out portion 230 and extends at an angle relative to the lead-out portion 230. In embodiments of this disclosure, the connecting portion 210 and the lead-out portion 230 can be integral, for example, formed by bending a single sheet of material. After bending, the connecting portion 231 extends at an angle relative to the lead-out portion 230. In embodiments of this disclosure, the connecting portion 231 extends perpendicularly relative to the lead-out portion 230, thereby ensuring that when the connecting portion 231 is welded to the tab 24, the lead-out portion 230 is in a vertical direction, facilitating subsequent assembly.

[0084] This results in a simple and effective pin structure, and reduces production and manufacturing costs.

[0085] Reference Figure 7, Figure 7 This is a schematic diagram of the pin 23 of a battery cell 20 according to some embodiments of this disclosure. For example... Figure 7 As shown, the connection portion 231 of the pin 23 includes a first connection portion 2310 and a second connection portion 2311 extending in opposite directions relative to the lead-out portion 230. That is, the first connection portion 2310 and the second connection portion 2311 are located on both sides of the lead-out portion 230, thus forming a generally V-shaped structure.

[0086] This structure allows the connecting portion 231 to be fixed to the tab 24 via the first connecting portion 2310 and the second connecting portion 2311 extending in opposite directions, making the overall structure more stable. Furthermore, the structure can still be formed by first cutting and then bending in the opposite direction, maintaining a simple and effective structure as well as lower production and manufacturing costs.

[0087] Reference Figure 6 and Figure 7 The pin 23 is formed in a plate shape. As mentioned above, the plate-shaped structure allows the pin structure to be formed by bending, ensuring a simple and effective structure as well as low production and manufacturing costs.

[0088] Continue to refer to Figure 5 The end cap 22 of the battery cell 20 is formed by two identical half-end caps. Each half-end cap includes a bottom wall 220 and a side wall 221. In embodiments of this disclosure, each half-end cap is formed as a semi-cylindrical shape. The outer diameter R of the bottom wall 220 of the half-end cap is slightly smaller than the inner diameter of the housing 21. The outer diameter R of the bottom wall 220 of the half-end cap can be the inner diameter of the housing 21 minus 1 mm. Furthermore, the height H1 of the side wall 221 can be greater than or equal to 4 mm.

[0089] The two half-end caps can seal the bare battery cell, electrode tabs and other structures in the housing cavity, resulting in a simple structure and lower production and manufacturing costs.

[0090] Reference Figure 3 , Figure 5 and Figure 6 In the battery cell 20, the connection portion 231 of the pin 23 ( Figure 3 (Not visible in the middle) Located between the bottom wall 220 of the half end cap and the bare cell 25. The lead-out portion 230 of the pin 23 is connected between the side wall 221 of one half end cap and the side wall 221 of the other half end cap. That is, the lead-out portion 230 of the pin 23 is sandwiched between the side walls 221 of the two half end caps.

[0091] Thus, by combining the structure of the two half-end caps, the terminals of the electrodes can be led out via the connecting part 231, but the rest of the structure is sealed in the receiving cavity, forming a compact and simple structure.

[0092] Reference Figure 6 The pin 23 further includes a covering 232 covering a portion of the lead-out portion 230 of the pin 23. The covering 232 is connected between the side wall 221 of one half end cap 22 and the side wall 221 of the other half end cap 22. The covering can be used to connect to the side wall 221 of the half end cap. For example, the covering can be fixedly connected to the side wall 221 by gluing, fusion, welding, etc. The height H2 of the covering can be greater than or equal to 6 mm. And the position and height of the covering are formed to correspond to the side wall 221. The covering portion can be polypropylene.

[0093] This allows for the formation of the sealing structure described above.

[0094] Reference Figure 5 The end cap 22 is formed in a cylindrical shape, and the half end cap 22 is formed in a semi-cylindrical shape. The sidewall 221 of the half end cap 22 includes a semi-circular sidewall 2211 and a rectangular sidewall 2210. The rectangular sidewall 2210 facilitates abutment and is therefore subsequently fixedly connected to the pin 23 and its cover. The contour of the semi-circular sidewall 2211 can match and abut against the inner wall of the housing 21, and is subsequently sealed together, thereby forming a sealed structure.

[0095] In this disclosure, both the end cap 22 and the housing 21 can be made of aluminum-plastic film. Aluminum-plastic film allows for easy molding and welding, resulting in a simple and effective structure at a low cost.

[0096] In the embodiments of this disclosure, the housing 21 is formed by winding an aluminum-plastic film and welding it at the overlapping walls in the circumferential direction. The first connecting portion 2310 and the second connecting portion 2311 of the connecting portion 231 of the pin 23 can be welded to the tab 24. The welded assembly is then inserted into the housing 21, and two semi-cylindrical half-end caps are placed at the ends of the housing 21, such that the semi-circular sidewalls 2211 of the half-end caps are both in contact with the inner wall of the housing 21, while the lead-out portion 230 of the pin 23 is sandwiched between the sidewall 221 of one half-end cap and the sidewall 221 of the other half-end cap. A heating device is then used to weld the housing 21 to the end cap 22, between the end caps 22, and between the end cap 22 and the pin 23 (more specifically, the covering portion 232). This forms a battery cell with a compact structure and low production and manufacturing costs. It also ensures good airtightness of the cell.

[0097] This disclosure also relates to a battery, characterized in that the battery includes a battery cell 20 as described above, wherein the lead-out portion 230 of the lead-out portion 23 of the battery cell 20 is connected to the battery plate.

[0098] This disclosure also relates to an electrical device comprising the battery as described above.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and not to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure, and they should all be covered within the scope of the claims and specification of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, include: Bare battery cells; The housing has walls forming a receiving cavity and includes a first end and a second end, the bare battery cell being received in the receiving cavity, and the housing also includes a joint located between the first end and the second end; An end cap is disposed at at least one of the first end and the second end.

2. The battery cell according to claim 1, characterized in that, The joint extends along the entire longitudinal direction of the housing.

3. The battery cell according to claim 1 or 2, characterized in that, At the joint, the walls of the housing overlap and join each other.

4. The battery cell according to claim 1 or 2, characterized in that, At the joint, the walls of the housing overlap and are fused together.

5. The battery cell according to claim 1 or 2, characterized in that, The shell is formed in a cylindrical shape.

6. The battery cell according to claim 1 or 2, characterized in that, The wall of the shell is made of aluminum-plastic film.

7. The battery cell according to claim 1 or 2, characterized in that, The battery cell also includes tabs, which are welded to the bare cell.

8. The battery cell according to claim 7, characterized in that, The battery cell also includes pins, each pin having a lead-out portion and a connecting portion, the connecting portion being used to connect to the tab.

9. The battery cell according to claim 8, characterized in that, The connecting portion is integral with the lead-out portion and extends at an angle relative to the lead-out portion.

10. The battery cell according to claim 9, characterized in that, The connecting portion includes a first connecting portion and a second connecting portion extending in opposite directions relative to the lead-out portion.

11. The battery cell according to claim 8, characterized in that, The pins are formed in a plate shape.

12. The battery cell according to claim 8, characterized in that, The end cap is formed by two identical half-end caps, each half-end cap including a bottom wall and a side wall.

13. The battery cell according to claim 12, characterized in that, The pin connection portion is located between the bottom wall of the half end cap and the bare cell, and the pin lead-out portion is connected between the side wall of one half end cap and the side wall of the other half end cap.

14. The battery cell according to claim 13, characterized in that, The pin also includes a cover covering a portion of the pin's lead-out portion, the cover being connected between a side wall of one half end cap and a side wall of the other half end cap.

15. The battery cell according to claim 14, characterized in that, The end cap is formed in a cylindrical shape, and the half end cap is formed in a semi-cylindrical shape, and the sidewall of the half end cap includes a semi-circular sidewall and a rectangular sidewall.

16. The battery cell according to claim 14, characterized in that, The end cap is made of aluminum-plastic film.

17. A battery, characterized in that, The battery includes a battery cell according to any one of claims 1-16, wherein the lead-out portion of the pin of the battery cell is connected to the busbar of the battery.

18. An electrical appliance, characterized in that, The electrical equipment includes the battery according to claim 17.

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