Battery monomer, battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery monomer, a battery device and a power utilization device. The battery cell provided by the embodiment of the utility model comprises a shell assembly, an electrode assembly, a current collecting component and a supporting part, the shell assembly is provided with a containing cavity, the electrode assembly is arranged in the containing cavity, the electrode assembly comprises a main body part and a tab part, and the tab part is arranged on at least one side of the main body part in the first direction; the current collecting component is electrically connected with the tab part, and at least part of the current collecting component is located between the shell assembly and the main body part in the first direction; the supporting part is at least partially positioned on one side, facing the main body part, of the current collecting component and surrounds at least part of the tab part. According to the battery cell provided by the embodiment of the invention, the safety performance of the battery cell can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. BACKGROUND

[0002] In recent years, with the rapid development of new energy technology, new energy vehicles are increasingly widely used and gradually replace traditional fuel vehicles to become one of the mainstream transportation tools. As the power source of new energy vehicles, power batteries are one of the core equipment of new energy vehicles, and therefore, the safety performance of power batteries has become the focus of attention.

[0003] In the development of battery technology, how to improve the safety performance of battery monomers, especially how to reduce internal short circuit when the battery monomer is impacted, is a research direction in the field of battery technology. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a battery monomer, a battery device and a power utilization device, which can improve the safety performance of the battery monomer when impacted.

[0005] In a first aspect, the embodiments of the present application provide a battery monomer, which comprises a shell assembly, an electrode assembly, a current collecting member and a support part. The shell assembly has a receiving cavity, and the electrode assembly is arranged in the receiving cavity. The electrode assembly comprises a main body part and a tab part, and the tab part is arranged on at least one side of the main body part along a first direction. The current collecting member is electrically connected with the tab part, and along the first direction, the current collecting member is at least partially located between the shell assembly and the main body part. The support part is at least partially located on a side of the current collecting member facing the main body part and is arranged around at least part of the tab part.

[0006] In the above embodiment scheme, the support part is located between the current collecting member and the main body part and surrounds at least part of the tab part. When the battery monomer is impacted, the support part can support the current collecting member, and can reduce the situation that the current collecting member is inserted into the main body part to cause short circuit when the current collecting member is deformed by impact. In addition, the support part at least partially surrounds the tab part, can provide support for the tab part, reduce the collapse of the tab part towards the shell assembly, prevent the tab part from loosening to a certain extent, and improve the stability of the structure of the tab part.

[0007] In some embodiments, at least part of the support part exceeds an end of the current collecting member along a second direction, and the second direction is perpendicular to the first direction.

[0008] In the above embodiment scheme, the support part exceeds the current collecting member, the area of the support part supporting the current collecting member is larger, the end of the current collecting member is further prevented from being inserted into the main body part, internal short circuit caused thereby is reduced, and the safety performance of the battery monomer is improved.

[0009] In some embodiments, the support member includes a first part and a second part, the first part being located on the side of the current collector member facing the main body, and the second part being located between the current collector member and the housing assembly.

[0010] In the above embodiment, the first part can support the current collector. When the battery cell is impacted, the first part can reduce the possibility of the current collector being deformed by the impact and inserting into the main body, causing a short circuit. The second part is located between the current collector and the outer casing assembly, which can isolate the current collector and the outer casing assembly, reduce the possibility of the current collector and the outer casing assembly overlapping during the use of the battery cell or when it is impacted, thus reducing the possibility of internal short circuit caused by the current collector and the outer casing assembly overlapping, thereby improving the safety performance of the battery cell.

[0011] In some embodiments, the second part includes an abutting part and a connecting part. The abutting part is disposed between the housing assembly and the current collecting member along a first direction, and the connecting part connects the abutting part and the first part. Along the first direction, the abutting part abuts against the housing assembly and the current collecting member.

[0012] In the above embodiments, on the one hand, along the first direction, the abutting part is located between the housing assembly and the current collector, which can reduce the risk of short circuit caused by the current collector contacting the housing assembly along the first direction; on the other hand, the abutting part abuts against the housing assembly and the current collector respectively, which can fix the current collector, reduce the shaking of the current collector inside the battery cell, and improve the stability and safety of the battery cell.

[0013] In some embodiments, the battery cell further includes an insulating component for isolating the current collector and the housing assembly. Along a first direction, the insulating component is located between the housing assembly and the current collector and abuts against the housing assembly and the abutment portion.

[0014] In the above embodiment, the abutting portion abuts against the insulating component and the current collector on its upper and lower sides along the first direction, respectively. The surface of the current collector facing the main body can abut against the tab portion. This reduces the shaking of the current collector inside the battery cell, improving the stability and safety of the battery cell. The connecting portion can isolate the current collector from the housing assembly along the second direction, reducing the risk of internal short circuits caused by overlap between the two.

[0015] In some embodiments, the abutting portion, the connecting portion, and the first portion together form a receiving groove, and the flow collecting member is at least partially disposed within the receiving groove.

[0016] In the above embodiments, the support component can be an integrally encapsulated current collector. When the battery cell is impacted, it can reduce the risk of the current collector inserting into the main body or overlapping with the outer casing, thus reducing the risk of internal short circuits and improving the safety performance of the battery cell when it is impacted.

[0017] In some embodiments, the housing assembly includes a housing and electrode terminals, the electrode terminals being disposed on the housing and including a current collector connection portion. In a first direction, at least a portion of the current collector connection portion is located between the housing and the current collector member, and in a second direction, the current collector member extends beyond the current collector connection portion.

[0018] In the above embodiment, along the second direction, the current collector extends beyond the current collector connection portion of the electrode terminal. Because the current collector has greater hardness than the electrode assembly, when the battery cell is impacted, the electrode assembly will correspondingly indent inward as the outer casing assembly indents inward. The current collector extending beyond the bottom of the electrode terminal will more easily overlap with the indented outer casing assembly, requiring more protection for the current collector. When a support component is provided to cover the current collector as a whole, the situation where the current collector inserts into the main body or overlaps with the outer casing assembly and causes a short circuit when the battery cell is impacted can be reduced, thus improving the safety performance of the battery cell when impacted.

[0019] In some embodiments, the housing assembly includes a housing and an electrode terminal, the electrode terminal being disposed on the housing and including a current collector connection portion. Along a first direction, at least a portion of the current collector connection portion is located between the housing and the current collector member, and along a second direction, an abutment portion is provided with a gap between it and the current collector abutment portion.

[0020] In the above embodiment, along the second direction, the abutment portion and the current-collecting abutment portion of the electrode terminal are spaced apart, so that the abutment portion will not interfere with the current-collecting abutment portion of the electrode terminal, and a certain space is reserved for the current-collecting abutment portion, which is beneficial to the assembly of the electrode terminal.

[0021] In some embodiments, at least one of the first part and the abutting part is connected to the connecting part by a rounded corner.

[0022] In the above embodiments, the rounded transition between the first part and the connecting part or the second part and the connecting part can avoid stress concentration at the bending connection and improve the overall stability of the support component. In addition, the rounded transition between the abutting part and the connecting part can guide it into the shell.

[0023] In some embodiments, along the second direction, the size of the abutment portion is larger than the size of the first portion.

[0024] In the above embodiment, along the first direction, the two surfaces of the current collector abut against the abutment portion and the tab portion respectively, while along the second direction, the abutment portion is longer than the first portion, and the abutment portion has a larger abutment area against the surface of the current collector on the side away from the main body portion, which can reduce the shaking of the current collector component inside the battery cell and improve the stability and safety of the battery cell.

[0025] In some embodiments, along the first direction, the size of the receiving groove near the central axis of the electrode assembly is smaller than the size of the receiving groove away from the central axis of the electrode assembly.

[0026] In the above embodiment, the receiving groove is an open structure at one end. The size of the opening along the first direction is set to be smaller than the size of the bottom of the groove along the first direction. The first part can be tilted towards the abutting part. In this way, the opening of the support member can provide a clamping force on the current collector. When the battery cell is impacted, the support member is not easy to fall off the edge of the current collector, thus improving the stability of the connection between the current collector and the support member.

[0027] In some embodiments, the first part, the second part, and the connecting part are integrally formed.

[0028] In the above embodiment, the support component is integrally molded, which reduces the difficulty of processing and molding, and improves the overall stability of the support component. It is not easy for the components to separate from the connection point during use or when the battery cell is impacted, thereby affecting the covering effect on the current collector.

[0029] In some embodiments, the tab includes a receiving space, and the support member is at least partially located within the receiving space.

[0030] In the above embodiments, at least some of the supporting components can be configured to correspond to the receiving space of the tab, thereby reducing the space occupied by the supporting components and improving the space utilization of the battery cell.

[0031] In some embodiments, the electrode portion includes a first electrode portion. Along the second direction, the size of the first electrode portion is smaller than the size of the main body portion. The surface of the first electrode portion facing the housing assembly along the second direction and the surface of the main body portion facing the housing assembly along the first direction together form a receiving space.

[0032] In the above embodiment, the first tab is an extension of the center of the main body. The outer periphery of the main body and the housing assembly does not extend the tab, which can reduce the short circuit caused by the outer tab overlapping with the housing assembly. At least some of the support components can be arranged to correspond to the receiving space of the tab, thereby reducing the space occupied by the support components and improving the space utilization of the battery cell.

[0033] In some embodiments, the support member and the main body are spaced apart along a first direction.

[0034] In the above embodiment, there is a certain gap between the support member and the main body along the first direction, which can prevent the support member and the main body from abutting each other and damaging the electrode. It can also ensure that the spacing between the electrode corresponding to the position of the support member along the first direction will not change due to abutting, thereby improving the stability of the battery cell.

[0035] In some embodiments, the electrode portion includes a first electrode portion and a second electrode portion, the second electrode portion surrounding the outside of the first electrode portion. Along a first direction, the size of the first electrode portion is larger than the size of the second electrode portion. The surface of the first electrode portion facing the housing assembly along a second direction and the surface of the second electrode portion facing the housing assembly along the first direction together form a receiving cavity.

[0036] In the above embodiments, a certain number of tabs are retained on the outer ring of the electrode assembly. The height of these tabs is less than the height of the tabs in the central area, which helps to maintain equal spacing between the electrode layers on the outer ring. At least some of the support components can be configured to correspond to the accommodating space of the tabs, thereby reducing the space occupied by the support components and improving the space utilization rate of the battery cell.

[0037] In some embodiments, the support member is spaced apart from the second electrode ear along a first direction.

[0038] In the above embodiment, there is a certain gap between the support member and the second electrode tab along the first direction, which can prevent the support member and the second electrode tab from abutting each other and damaging the electrode sheet. It can also ensure that the spacing between the electrode sheets corresponding to the position of the support member along the first direction will not change due to abutting, thereby improving the stability of the battery cell.

[0039] In some embodiments, the battery cell further includes a protective component, at least a portion of which is located between the body portion and the housing assembly and covers the body portion.

[0040] In the above embodiments, covering the outer side of the main body with a protective component can reduce the direct contact between the electrode assembly and the outer shell assembly, thus reducing the risk of short circuits.

[0041] In some embodiments, the protective member further covers at least a portion of the electrode tab, and along the second direction, at least a portion of the protective member is located between the electrode tab and the support member. Thus, with the protective member covering the electrode tab from the main body and at least a portion of the protective member located between the electrode tab and the support member, direct contact between the electrode assembly and the housing assembly, preventing a short circuit, can be avoided. Furthermore, along the second direction, the protective member being located between the electrode tab and the support member allows the support member to secure the protective member, facilitating its fixation.

[0042] In some embodiments, the protective member further covers at least a portion of the current collector, with the protective member located on the side of the current collector away from the electrode assembly. Thus, the protective member can cover the surface of the current collector opposite to the main body, providing insulation protection for the current collector, and along the first direction, the protective member is located between the support member and the current collector, and can be secured by the support member.

[0043] In some embodiments, the protective component also covers at least a portion of the support component. This allows the protective component to extend from the main body to cover the support component, simplifying the process and making it easier to operate.

[0044] In some embodiments, the support member includes an insulating material. This prevents a short circuit caused by the current collector overlapping with the housing assembly.

[0045] In some embodiments, the support component includes an elastic material. Thus, the support component can act as a buffer when the battery cell is subjected to impact, and the elastic support component can be pre-assembled with the current collector, reducing assembly difficulty.

[0046] In some embodiments, at least a portion of the support member abuts against the housing assembly along the second direction, thereby securing the support member and reducing its movement within the battery cell.

[0047] In some embodiments, the inner surface of the housing assembly is coated with an insulating coating, and along the second direction, the insulating coating is at least partially disposed on the side of the support member facing the housing assembly.

[0048] In the above embodiments, the inner surface of the housing assembly is coated with an insulating coating to provide greater impact protection for the battery cells. When a battery cell is impacted, the insulating coating on the inner surface of the housing assembly can prevent the current collector from contacting the housing assembly and causing a short circuit when it breaks through the supporting component.

[0049] In some embodiments, along the second direction, the insulating coating completely covers the orthographic projection of the support member onto the housing assembly.

[0050] In the above embodiment, along the second direction, the insulating coating completely covers the supporting component, providing greater impact protection for the battery cell. When the battery cell is impacted, when the current collector breaks through the supporting component, the insulating coating coated on the inner surface of the housing assembly can prevent the current collector from colliding with the housing assembly and short-circuiting.

[0051] Secondly, embodiments of this application provide a battery device including a battery cell of any of the above embodiments.

[0052] Thirdly, embodiments of this application also provide an electrical device, including a battery device according to any of the above embodiments, the battery device being used to provide electrical energy.

[0053] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application 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 application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0054] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the structure of a vehicle disclosed in an embodiment of this application;

[0056] Figure 2 This is an exploded structural diagram of a battery pack disclosed in an embodiment of this application;

[0057] Figure 3 This is a schematic cross-sectional view of a battery cell disclosed in an embodiment of this application;

[0058] Figure 4 This is a partial perspective view of a support component inside a battery cell disclosed in an embodiment of this application;

[0059] Figure 5 This is a cross-sectional view of a support component inside a battery cell disclosed in an embodiment of this application;

[0060] Figure 6 This is a partial detail view of a battery cell disclosed in an embodiment of this application;

[0061] Figure 7 This is a partial detail view of a battery cell disclosed in an embodiment of this application;

[0062] Figure 8 This is a schematic cross-sectional view of a battery cell disclosed in an embodiment of this application;

[0063] Figure 9 This is a partial detail view of a battery cell disclosed in an embodiment of this application;

[0064] Figure 10 This is a partial detail view of a battery cell disclosed in an embodiment of this application.

[0065] The accompanying drawings are not drawn to scale.

[0066] Markings: 1000, vehicle; 200, controller; 300, motor;

[0067] 100. Battery assembly; 10. Housing; 11. First part; 12. Second part; 20. Battery cell; 24. Current collector; 22. Electrode assembly; 221. Main body; 222. Terminal tab; 2221. First terminal tab; 2222. Second terminal tab; 26. Housing assembly; 261. Housing; 262. Electrode terminal; 2621. Current collector connection; 25. Supporting component; 251. First part; 252. Second part; 2521. Abutment part; 2522. Connecting part; 23. Insulating component; 27. Protective component; 28. Insulating coating;

[0068] X, the first direction; Y, the second direction. Detailed Implementation

[0069] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0070] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0071] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] In related technologies, a support component is installed inside the battery cell to prevent short circuits caused by the current collector overlapping with the casing assembly. To reduce the impact of the support component on the expansion of the electrode assembly, the support component located between the electrode assembly and the casing assembly is very thin. When the battery cell is impacted, the casing assembly will indent inward, and the current collector will also deform under impact. When the current collector deforms towards the main body of the electrode assembly, the deformed current collector will insert into the main body and easily puncture the thin support component overlapping with the casing assembly. Both of these situations can lead to internal short circuits in the battery cell, causing serious consequences such as fire, explosion, and thermal runaway.

[0073] Research has found that by changing the structure of the support component and placing a portion of the support component between the current collector and the electrode assembly along the first direction, the support component can support the current collector. When the current collector deforms toward the main body of the electrode assembly due to an impact on the battery cell, the support component can deform along with the current collector, thus preventing the current collector from being directly inserted into the main body and causing a short circuit.

[0074] Based on this, embodiments of this application provide a battery cell, which includes a housing assembly, an electrode assembly, a current collector, and a support member. The housing assembly has a receiving cavity, and the electrode assembly is disposed within the receiving cavity. The electrode assembly includes a main body and a tab, with the tab disposed on at least one side of the main body along a first direction. The current collector is electrically connected to the tab, and along the first direction, at least a portion of the current collector is located between the housing assembly and the main body. The support member is at least a portion located on the side of the current collector facing the main body and is disposed around at least a portion of the tab. The support member can support the current collector and the electrode assembly, reducing the impact resistance of the battery cell when the current collector deforms towards the main body of the electrode assembly after being impacted, preventing it from directly inserting into the main body or overlapping with the deformed housing assembly.

[0075] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, cuboid / square battery cells, and pouch battery cells, and the embodiments of this application are not limited thereto.

[0076] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0077] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0078] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0079] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0080] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0081] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0082] 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 application.

[0083] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0084] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0085] In some embodiments of this application, the battery 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.

[0086] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, the housing 10 being used to house the battery cells 20.

[0087] The housing 10 is a component that houses the battery cell 20, providing a space for the battery cell 20. The housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, which overlap each other to define a space for accommodating the battery cell 20. The first part 11 and the second part 12 can have various shapes, such as a cuboid or a cylinder. The first part 11 can be a hollow structure open on one side, and the second part 12 can also be a hollow structure open on one side, with the open side of the second part 12 overlapping the open side of the first part 11, thus forming a housing 10 with a accommodating space. Alternatively, the first part 11 can be a hollow structure open on one side, and the second part 12 can be a plate-like structure, with the second part 12 overlapping the open side of the first part 11, thus forming a housing 10 with a accommodating space. The first part 11 and the second part 12 can be sealed using a sealing element, such as a sealing ring or sealant.

[0088] In the battery device 100, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that the multiple battery cells 20 are connected in both series and parallel. Alternatively, multiple battery cells 20 can be first connected in series, in parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. Another option is that all the battery cells 20 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole consisting of all the battery cells 20 is housed within the housing 10.

[0089] In some embodiments, the battery device 100 may further include a busbar component, through which multiple battery cells 20 can be electrically connected to each other to achieve series, parallel, or mixed connection of the multiple battery cells 20. The busbar component may be a metallic conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0090] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application. Battery cell 20 refers to the smallest unit that makes up the battery. For example... Figure 3The battery cell 20 includes a housing assembly 26, an electrode assembly 22, a current collector 24, and a support member 25. The housing assembly 26 has a receiving cavity, and the electrode assembly 22 is disposed within the receiving cavity. The electrode assembly 22 includes a main body portion 221 and a tab portion 222, with the tab portion 222 disposed on at least one side of the main body portion 221 along a first direction X. The current collector 24 is electrically connected to the tab portion 222, and along the first direction X, the current collector 24 is at least partially located between the housing assembly 26 and the main body portion 221. The support member 25 is at least partially located on the side of the current collector 24 facing the main body portion 221 and is disposed around at least a portion of the tab portion 222.

[0091] The housing assembly 26 is a component that isolates the internal environment of the battery cell 20 from the external environment. Optionally, the housing assembly 26 can be made of a material with a certain degree of hardness and strength (such as aluminum alloy), so that the housing assembly 26 is not easily deformed under compression and impact, giving the battery cell 20 higher structural strength and improving safety performance. The housing assembly 26 may include a shell and end caps. The shell can be an open structure at one end or at both ends, and the end caps can cover the openings. The shape and structure of the end caps can be adapted to the shape and structure of the shell openings.

[0092] The housing assembly 26 may be provided with functional components such as electrode terminals 262. Electrode terminals 262 can be electrically connected to electrode assembly 22 for outputting or inputting electrical energy to the battery cell 20. In some embodiments, the housing assembly 26 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the housing assembly 26 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating component 23 may also be provided inside the housing assembly 26. The insulating component 23 can be used to isolate the electrical connection components inside the battery cell 20 from the housing assembly 26 to reduce the risk of short circuit due to contact. Exemplarily, the insulating component can be plastic, rubber, etc.

[0093] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 20, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0094] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector. As an example, the positive electrode current collector has two surfaces opposite each other in its own thickness direction, and the positive electrode active material is disposed on either or both of the two opposite surfaces of the positive electrode current collector.

[0095] In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector. The negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector. As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0096] In some embodiments, the electrode assembly 22 further includes a separator disposed between the positive and negative electrodes. In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0097] The electrode assembly 22 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked. In some embodiments, the electrode assembly 22 is a wound structure. The positive and negative electrode sheets are wound into a wound structure. In some embodiments, the electrode assembly 22 is a stacked structure. As an example, multiple positive and negative electrode sheets can be provided, with multiple positive and multiple negative electrode sheets stacked alternately. As an example, multiple positive electrode sheets can be provided, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments. As an example, both positive and negative electrode sheets are folded to form multiple stacked folded segments. As an example, multiple spacers can be provided, respectively disposed between any adjacent positive or negative electrode sheets. As an example, spacers can be continuously provided, disposed between any adjacent positive or negative electrode sheets by folding or winding. In some embodiments, the shape of the electrode assembly 22 can be cylindrical, flat, or polygonal, etc.

[0098] In some embodiments, the electrode assembly 22 is provided with tabs that allow current to be drawn from the electrode assembly 22. The tabs include a positive tab and a negative tab. The positive tab extends from the positive electrode plate, and the negative tab extends from the negative electrode plate. The tabs can extend from one end of the electrode assembly 22, or from opposite ends in one direction.

[0099] The current collector 24 is a component that enables electrical connection between two parts. For example, the current collector 24 enables electrical connection between the electrode assembly 22 and the housing assembly 26. Both the tabs (positive or negative) of the electrode assembly 22 and the housing assembly 26 are connected to the current collector 24 to achieve electrical connection between the housing assembly 26 and the electrode assembly 22. The current collector 24 can be of various shapes, such as circular or rectangular. The shape of the current collector 24 can be adapted to the shape of the housing assembly 26. For example, if the housing assembly 26 is cylindrical, the current collector 24 can be circular. The current collector 24 is connected to both the electrode assembly 22 and the housing assembly 26. The current collector 24 is connected to the tabs of the electrode assembly 22 and to the housing assembly 26. The connection between the current collector 24 and the electrode assembly 22 can be such that they are only in contact and not fixed, for example, the current collector 24 and the electrode assembly 22's tab 221 abut against each other; or the connection between the current collector 24 and the electrode assembly 22's tab can be such that they are fixed to each other, for example, the current collector 24 and the electrode assembly 22's tab are welded together. Similarly, the connection between the housing assembly 26 and the current collector 24 can be such that they are only in contact and not fixed, for example, the housing assembly 26 and the current collector 24 abut against each other; or the connection between the housing assembly 26 and the current collector 24 can be such that they are fixed to each other, for example, the housing assembly 26 and the current collector 24 are welded together. It should be noted that the tab in the electrode assembly 22 connected to the current collector 24 can be either a positive tab or a negative tab.

[0100] The electrode assembly 22 includes a main body 221 and tabs 222. The electrode assembly 22 can be a wound structure formed by winding a positive electrode, a negative electrode, and a separator together, or a stacked structure in which positive and negative electrodes are alternately layered. The main body 221 can be the portion of the electrode assembly 22 where the electrode is coated with active material, and the tabs 222 can be the portion of the electrode assembly 22 where the electrode is not coated with active material. The tabs 222 include a collection of tabs extending from the main body 221, and can be connected to a current collector 24 to conduct current from inside the electrode assembly 22. Preferably, the tabs 222 and the current collector 24 can be connected by welding.

[0101] The support member 25 can be used to isolate the edge region of the current collector 24 from the electrode assembly 22. In some embodiments, the support member 25 can isolate the current collector 24 from the main body 221; in other embodiments, the support member 25 can isolate the current collector 24 from a portion of the tab 222. When the battery cell 20 is subjected to impact, the support member 25 can reduce the risk of short circuit caused by the edge of the current collector 24 inserting into the main body 221. In addition, the support member 25 can also be located between the current collector 24 and the housing assembly 26 to isolate the current collector 24 from the housing assembly 26 and reduce the risk of short circuit caused by direct contact between the two.

[0102] The support member 25 may be partially disposed on two surfaces of the current collector 24 along the first direction X. In some embodiments, along the first direction X, the support member 25 located between the housing assembly 26 and the current collector 24 can directly abut against the housing assembly 26. In this way, the support member 25 can both isolate the current collector 24 from the housing assembly 26 and abut against the current collector 24 together with the tab 222, thereby improving the stability of the current collector 24. In other embodiments, the housing assembly 26 may be provided with an insulating member 23. In this case, along the first direction X, the support member 25 can abut against the insulating member 23 and abut against the current collector 24 together with the tab 222 along the first direction X, thereby improving the stability of the current collector 24.

[0103] The support member 25 is disposed around at least part of the tab 222. The support member 25 can be a continuous ring structure that surrounds at least part of the tab 222, which can fix the tab 222 in the ring structure and improve the stability of the battery cell 20.

[0104] Preferably, the support member 25 can be made of an insulating material. The support member 25 can cover the current collector 24. Making it an insulating material can isolate the current collector 24 from the housing assembly 26 and the main body 221 of the electrode assembly 22, reducing the risk of short circuit. In addition, to facilitate the assembly of the current collector 24 and the support member 25, the support member 25 is preferably made of an elastic material.

[0105] In the above embodiment, the support member 25 is located between the current collector 24 and the main body 221 and surrounds at least part of the tab 222. When the battery cell 20 is impacted, the support member 25 can support the current collector 24, which can reduce the possibility of the current collector 24 inserting into the main body 22 and causing a short circuit when it is deformed by the impact. In addition, the support member 25 surrounds at least part of the tab 222, which can provide support for the tab 222, reduce the tab 222 from collapsing towards the housing assembly 26, prevent the tab from loosening to a certain extent, and improve the stability of the tab 222 structure.

[0106] In some implementations, such as Figure 3 , Figure 6 and Figure 7 As shown, at least part of the support member 25 extends beyond the end of the current collector member 24 along the second direction Y, which is perpendicular to the first direction X.

[0107] According to the battery cell 20 provided in the embodiments of this application, the supporting member 25 extends beyond the current collector 24, and its supporting current collector 24 has a larger area, which further reduces the possibility that the battery cell 20 will be inserted into the main body 221 or overlap with the outer casing assembly 26 when it is impacted, thereby reducing the internal short circuit and improving the safety performance of the battery cell 20.

[0108] In some implementations, such as Figure 4 As shown, the support member 25 includes a first part 251 and a second part 252. The first part 251 is located on the side of the current collection member 24 facing the main body part 221, and the second part 252 is located between the current collection member 24 and the outer shell assembly 26.

[0109] The first part 251 can be disposed between the current collector 24 and the main body 221. The first part 251 can support the current collector 24 and reduce the risk of short circuit caused by the current collector 24 inserting into the main body 221 and the tab 222 when the battery cell 20 is impacted. The second part 252 can be disposed on the surface of the current collector 24 away from the main body 221 and disposed between the housing assembly 26 and the current collector 24 along the first direction X, so as to isolate the two and reduce short circuit caused by overlap; the second part 252 can also cover the end of the current collector 24 to reduce the risk of short circuit caused by overlap between the current collector 24 and the housing assembly 26.

[0110] According to the battery cell 20 provided in the embodiments of this application, the first part 251 can support the current collector 24. When the battery cell 20 is impacted, the first part 251 can reduce the situation where the current collector 24 is deformed by impact and inserts into the main body 22, causing a short circuit. The second part 252 is located between the current collector 24 and the outer casing assembly 26, which can isolate the current collector 24 and the outer casing assembly 26, reduce the situation where the current collector 24 and the outer casing assembly 26 overlap during the use of the battery cell 20 or when it is impacted, thus causing an internal short circuit and improving the safety performance of the battery cell 20.

[0111] In some implementation methods, please refer to Figure 5 and Figure 6 The second part 252 includes an abutting part 2521 and a connecting part 2522. The abutting part 2521 is disposed between the housing assembly 26 and the current collecting member 24 along the first direction X. The connecting part 2522 connects the abutting part 2521 and the first part 251. Along the first direction X, the abutting part 2521 abuts against the housing assembly 26 and the current collecting member 24.

[0112] The abutment portion 2521 is a support member 25 provided on the surface of the current collector 24 opposite to the main body portion 221, and the connecting portion 2522 is used to connect the abutment portion 2521 and the first portion 251. Along the second direction Y, the connecting portion 2522 is located between the current collector 24 and the outer casing assembly 26.

[0113] The abutment portion 2521 can directly abut against the housing assembly 26 or indirectly abut against the housing assembly 26. For example, an insulating member 23 can also be provided inside the battery cell 20. Along the first direction, the abutment portion 2522 indirectly abuts against the housing assembly 26 by abutting against the insulating member 23.

[0114] In some embodiments, the battery cell 20 further includes an insulating component 23 for isolating the current collector 24 and the housing assembly 26. Along the first direction X, the insulating component 23 is located between the housing assembly 26 and the current collector 24. The second part 252 includes an abutting part 2521 and a connecting part 2522. Along the first direction X, the abutting part 2521 abuts against the insulating component 23 and the current collector 24. The two ends of the connecting part 2522 are respectively connected to the abutting part 2521 and the first part 251.

[0115] The insulating component 23 is made of insulating material and is disposed between the housing assembly 26 and the current collector 24 along the first direction X. It can isolate the electrical connection between the housing assembly 26 and the current collector 24, reducing the risk of short circuits caused by contact. The insulating component 23 can be fixedly connected to the housing assembly 26 by heat fusion, adhesive bonding, or other methods. Preferably, the insulating component 23 can be made of elastic material, so that the insulating component 23 can also play a buffering role under normal use of the battery cell 20 or under special circumstances of impact.

[0116] Along the first direction X, the insulating component 23 abuts against the contact portion 2521, and the contact portion 2521 abuts against the current collector 24. The surface of the current collector 24 facing the main body portion 221 can be supported by the tab portion 222. At this time, the current collector 24 is fixed inside the battery cell 20.

[0117] According to the battery cell 20 provided in this application embodiment, the abutment portion 2521 abuts against the insulating component 23 and the current collector 24 on its upper and lower sides along the first direction X, respectively. The surface of the current collector 24 facing the main body portion 221 can abut against the tab portion 222. In this way, the shaking of the current collector 24 inside the battery cell 20 can be reduced, thereby improving the stability and safety of the battery cell 20. The connecting portion 2522 can isolate the current collector 24 from the housing assembly 26 along the second direction Y, reducing the risk of internal short circuit caused by the two overlapping.

[0118] In some embodiments, please refer to Figure 5 The abutting part 2521, the connecting part 2522 and the first part 251 together form a receiving groove, and the flow collecting member 24 is at least partially disposed in the receiving groove.

[0119] The receiving groove has an opening facing the flow collecting member 24. The abutment portion 2521 and the first portion 251 that form the two planes of the receiving groove can be parallel to each other; or they can be at a certain angle to form an opening-and-constriction structure. In this case, the abutment portion 2521 and the first portion 251 can jointly clamp the flow collecting member 24, reducing the risk of the flow collecting member 24 falling out of the receiving groove.

[0120] Along the second direction Y, the abutment portion 2521 can extend beyond the first portion 251. In this way, the abutment portion 2521 has a larger contact surface with the surface of the current collector 24 on the side away from the main body portion 221, which can better fix the current collector 24.

[0121] According to the battery cell 20 provided in the embodiments of this application, the support component 25 can be an integral cover of the current collector 24. When the battery cell 20 is impacted, it can reduce the insertion of the current collector 24 into the main body 22 or its overlap with the outer casing 26, which could lead to an internal short circuit and improve the safety performance of the battery cell 20 when it is impacted.

[0122] In some embodiments, such as Figure 3 As shown, the housing assembly 26 includes a housing 261 and an electrode terminal 262. The electrode terminal 262 is disposed on the housing 261 and includes a current collector connection portion 2621. Along the first direction X, at least a portion of the current collector connection portion 2621 is located between the housing 261 and the current collector member 24. Along the second direction Y, the current collector member 24 extends beyond the current collector connection portion 2621.

[0123] The electrode terminal 262 is a component that conducts the internal current of the battery cell 20. The current collector connection 2621 at the bottom of the electrode terminal 262 is disposed inside the housing assembly 26. The current collector connection 2621 can be electrically connected to the current collector member 24, so that the current can be conducted from the electrode assembly 22 to the outside of the battery cell 20 through the current collector member 24 and the current collector connection 2621.

[0124] Along the second direction Y, the current collector 24 extends beyond the current collector connection 2621. Because the current collector 24 is harder than the electrode assembly 22, when the battery cell 20 is impacted, the electrode assembly 22 will also indent inward as the outer casing assembly 26 indents inward. The current collector 24 extending beyond the bottom of the electrode terminal 262 will be more likely to overlap with the indented outer casing assembly 26, and more protection is needed for the current collector 24.

[0125] In some embodiments, please refer to Figure 3 The housing assembly 26 includes a housing 261 and an electrode terminal 262. The electrode terminal 262 is disposed on the housing 261 and includes a current collector connection portion 2621. Along the first direction X, at least a portion of the current collector connection portion 2621 is located between the housing 261 and the current collector member 24. Along the second direction Y, the abutment portion 2521 is spaced apart from the current collector abutment portion 2521.

[0126] According to the battery cell 20 provided in the embodiment of this application, along the second direction Y, the abutment portion 2521 and the current collecting abutment portion 2521 of the electrode terminal 262 are separated by a gap. The abutment portion 2521 will not interfere with the current collecting abutment portion 2521 of the electrode terminal 262. A certain space is reserved for the current collecting abutment portion 2521, which is beneficial to the assembly of the electrode terminal 262.

[0127] In some embodiments, please refer to Figure 5 At least one of the first part 251 and the abutting part 2521 is connected to the connecting part 2522 by a rounded corner.

[0128] According to the battery cell 20 provided in the embodiments of this application, the first part 251 and the connecting part 2522 or the second part 252 and the connecting part 2522 are connected by rounded corners, which can avoid stress concentration at the bending connection and improve the overall stability of the support member 25. In addition, the abutting part 2521 and the connecting part 2522 are connected by rounded corners, which can guide them into the shell.

[0129] In some embodiments, please continue to refer to Figure 5 Along the second direction Y, the size of the contact portion 2521 is larger than the size of the first portion 251.

[0130] According to the battery cell 20 provided in the embodiments of this application, along the first direction X, the two surfaces of the current collector 24 abut against the contact portion 2521 and the tab portion 222 respectively, while along the second direction Y, the contact portion 2521 is longer than the first portion 251, and the contact area between the contact portion 2521 and the surface of the current collector away from the main body portion 221 is larger, which can reduce the shaking of the current collector 24 inside the battery cell 20 and improve the stability and safety of the battery cell 20.

[0131] In some embodiments, please refer to Figure 3 Along the first direction X, the size of the receiving groove near the central axis of the electrode assembly 22 is smaller than the size of the receiving groove away from the central axis of the electrode assembly 22.

[0132] The receiving groove has an open structure at one end. The size of the opening along the first direction X is set to be smaller than the size of the bottom of the groove along the first direction X. The first part 251 can be tilted toward the abutting part 2521. In this way, the opening of the support part can provide an upper and lower clamping force to the collecting member 24.

[0133] According to the battery cell 20 provided in the embodiments of this application, when the battery cell 20 is impacted, the support member 25 is not easy to fall off from the edge of the current collector 24, thereby improving the stability of the connection between the current collector 24 and the support member 25.

[0134] In some embodiments, the first part 251, the second part 252, and the connecting part 2522 are integrally formed.

[0135] According to the battery cell 20 provided in the embodiments of this application, the support component 25 is integrally formed, which reduces the difficulty of processing and forming, and improves the overall stability of the support component 25. It is not easy for the components to separate from the connection point during use or when the battery cell 20 is impacted, thereby affecting the covering effect on the current collector 24.

[0136] In some embodiments, such as Figure 6 and Figure 7 As shown, in some embodiments, the tab 222 includes a receiving space, and the support member 25 is at least partially located within the receiving space.

[0137] According to the battery cell 20 provided in the embodiments of this application, at least a portion of the support member 25 can be arranged corresponding to the accommodating space of the tab portion 222, thereby reducing the space occupied along the support member 25 and improving the space utilization rate of the battery cell 20.

[0138] In some embodiments, such as Figure 6 As shown, the electrode portion 222 includes a first electrode portion 2221. Along the second direction Y, the size of the first electrode portion 2221 is smaller than the size of the main body portion 221. The surface of the first electrode portion 2221 facing the outer shell assembly 26 along the second direction Y and the surface of the main body portion 221 facing the outer shell assembly 26 along the first direction X together form an accommodating space.

[0139] The first electrode 2221 is an electrode extending from the center of the main body 221. The outer periphery of the main body 221 and the outer shell assembly 26 does not have any extended electrode, which can reduce the risk of short circuits caused by the outer electrode overlapping with the outer shell assembly 26.

[0140] According to the battery cell 20 provided in the embodiments of this application, at least a portion of the support member 25 can be arranged corresponding to the accommodating space of the tab portion 222, thereby reducing the space occupation of the support member 25 and improving the space utilization rate of the battery cell 20.

[0141] In some embodiments, such as Figure 6 As shown, the support member 25 and the main body 221 are spaced apart along the first direction X.

[0142] According to the battery cell 20 provided in the embodiments of this application, there is a certain gap between the support member 25 and the main body 221 along the first direction X, which can prevent the support member 25 and the main body 221 from abutting against each other and damaging the electrode sheets, and also ensure that the spacing between each electrode sheet corresponding to the position of the support member 25 along the first direction X will not change due to abutting, thereby improving the stability of the battery cell 20.

[0143] In some embodiments, such as Figure 7As shown, the electrode tab 222 includes a first electrode tab 2221 and a second electrode tab 2222. The second electrode tab 2222 surrounds the outside of the first electrode tab 2221 along the first direction X. The size of the first electrode tab 2221 is larger than the size of the second electrode tab 2222. The surface of the first electrode tab 2221 facing the housing assembly 26 along the second direction Y and the surface of the second electrode tab 2222 facing the housing assembly 26 along the first direction X together form a receiving cavity.

[0144] According to the battery cell 20 provided in the embodiments of this application, the outer ring of the electrode assembly 22 retains a certain number of tabs, and the height of the retained tabs is less than the height of the tabs in the central area, which is beneficial to maintaining equal spacing between the electrode sheets of each layer in the outer ring. At least a portion of the support member 25 can be arranged to correspond to the accommodating space of the tab portion 222, thereby reducing the space occupation of the support member 25 and improving the space utilization rate of the battery cell 20.

[0145] In some embodiments, please continue to refer to Figure 7 Along the first direction X, the support member 25 and the second pole ear 2222 are spaced apart.

[0146] According to the battery cell 20 provided in the embodiments of this application, there is a certain gap between the support member 25 and the second electrode tab 2222 along the first direction X. This can prevent the support member 25 and the second electrode tab 2222 from abutting against each other and damaging the electrode sheets. It can also ensure that the spacing between the layers of electrode sheets corresponding to the position of the support member 25 along the first direction X will not change due to abutting, thereby improving the stability of the battery cell 20.

[0147] In some embodiments, please refer to Figure 8 The battery cell 20 also includes a protective component 27, at least a portion of which is located between the main body 221 and the housing assembly 26 and covers the main body 221.

[0148] The protective component 27 can be an insulating film. To fix the protective component 27, a layer of adhesive can be coated on its surface. In this case, the protective component 27 is similar to tape and can play a certain role in fixing and connecting. Covering the main body 221 can reduce the risk of short circuit caused by direct contact between the main body 221 and the outer shell assembly 26. When the tab extends from one end of the main body 221, the protective component 27 can be disposed between the main body 221 and the outer shell assembly 26 along the first direction X. In this case, the protective component 27 covers the main body 221 and the side opposite to the direction in which the tab extends. Alternatively, it can be disposed between the main body 221 and the outer shell assembly 26 along the second direction Y.

[0149] According to the battery cell 20 provided in the embodiments of this application, the protective component 27 covers the tab portion 222 from the main body portion 221. At least part of the protective component 27 is located between the tab portion 222 and the support component 25, which can prevent the electrode assembly 22 from directly contacting the housing assembly 26 and short-circuiting. In addition, along the second direction Y, the protective component is located between the tab portion 22 and the support component 25, and the protective component 27 can be fixed by the support component 25, which facilitates the fixing of the protective component 27.

[0150] In some embodiments, please refer to Figure 9 The protective component 27 also covers at least a portion of the current collector 24, and the protective component 27 is located on the side surface of the current collector 24 away from the electrode assembly 22.

[0151] When the protective component 27 is coated with colloid, the protective component 27 can also be used to strengthen the fixed connection between the current collector 24 and the tab 222.

[0152] According to the battery cell 20 provided in the embodiments of this application, the protective component 27 can cover the surface of the current collector 24 facing away from the main body 221, and can provide insulation protection for the current collector 24. In addition, along the second direction, the protective component is located between the current collector 24 and the support component 25, and the protective component 27 can be fixed by the support component 25, which facilitates the fixing of the protective component 27.

[0153] In some embodiments, the protective component 27 also covers at least a portion of the supporting component 25.

[0154] In the above embodiment, the protective component 27 can extend directly from the main body 221 to the support component 25 for covering, which makes the process simpler and easier to operate.

[0155] In some embodiments, the support member 25 includes an insulating material.

[0156] Insulating materials can be plastics, rubber, etc.

[0157] In the above embodiment, the support component 25 is made of insulating material to prevent the current collector 24 from short-circuiting due to contact with the housing assembly 26.

[0158] In some embodiments, the support member 25 includes an elastic material.

[0159] In the above embodiment, the support component 25 is made of an elastic material, which can play a buffering role when the battery cell 20 is impacted. The elastic support component 25 can be assembled with the current collector 24 first, reducing the assembly difficulty.

[0160] In some embodiments, please refer to along Figure 6 and Figure 7 In the second direction, at least part of the supporting components are connected to the housing assembly.

[0161] According to the battery cell 20 provided in the embodiments of this application, at least a portion of the support member 25 abuts against the outer casing assembly 26, which can fix the support member 25 and reduce the movement of the support member 25 within the battery cell 20.

[0162] In some embodiments, please refer to Figure 10 The inner surface of the housing assembly 26 is coated with an insulating coating 28, which is at least partially disposed on the side of the support member 25 facing the housing assembly 26 along the second direction Y.

[0163] According to the battery cell 20 provided in the embodiments of this application, the inner surface of the housing assembly 26 is coated with an insulating coating 28 to provide the battery cell 20 with more impact protection. When the battery cell 20 is impacted, when the current collector 24 is pushed out of the support member 25, the insulating coating 28 coated on the inner surface of the housing assembly 26 can further reduce the risk of short circuit due to contact between the current collector 24 and the housing assembly 26.

[0164] In some embodiments, please refer to Figure 10 Along the second direction Y, the insulating coating 28 completely covers the orthographic projection of the support member 25 onto the housing assembly 26.

[0165] According to the battery cell 20 provided in the embodiments of this application, the insulating coating 28 has a larger coverage area, providing more impact protection for the battery cell 20. When the battery cell 20 is impacted, when the current collector 24 punches out of the support member 25, the insulating coating 28 coated on the inner surface of the housing assembly 26 can prevent the current collector 24 from colliding with the housing assembly 26 and short-circuiting.

[0166] Secondly, embodiments of this application provide a battery device 100, including a battery cell 20 of any of the above embodiments.

[0167] Thirdly, embodiments of this application also provide an electrical device, including a battery device 100 of any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0168] According to some embodiments of the application, this application provides a battery cell 20, including a housing assembly 26, an electrode assembly 22, a current collector 24, and a support member 25. The housing assembly 26 has a receiving cavity, and the electrode assembly 22 is disposed within the receiving cavity. The electrode assembly 22 includes a main body portion 221 and a tab portion 222, with the tab portion 222 disposed on at least one side of the main body portion 221 along a first direction X. The current collector 24 is electrically connected to the tab portion 222, and along the first direction X, the current collector 24 is at least partially located between the housing assembly 26 and the main body portion 221. The support member 25 is at least partially located on the side of the current collector 24 facing the main body portion 221 and is disposed around at least a portion of the tab portion 222. The housing 261 assembly 26 includes a housing 261 and electrode terminals 262. The electrode terminals 262 are disposed on the housing 261 and include a current-collecting connection portion 2621. Along a first direction X, at least a portion of the current-collecting connection portion 2621 is located between the housing 261 and the current-collecting member 24. Along a second direction Y, the current-collecting member 24 extends beyond the current-collecting connection portion 2621. The battery cell 20 also includes an insulating member 23 for isolating the current-collecting member 24 and the housing 261 assembly 26. Along the first direction X, the insulating member 23 is located between the housing 261 assembly 26 and the current-collecting member 24. The support member 25 includes a first part 251, an abutment part 2521, and a connecting part 2522. The first part 251 is located on the side of the current collector 24 facing the main body 221. The abutment part 2521 is located on the side of the current collector 24 away from the main body 221. Along the first direction X, the abutment part 2521 abuts against the insulating member 23 and the current collector 24. The two ends of the connecting part 2522 are connected to the abutment part 2521 and the first part 251, respectively. The abutment part 2521, the connecting part 2522, and the first part 251 together form a receiving groove, and the current collector 24 is at least partially disposed within the receiving groove. Along the first direction X, the dimension of the receiving groove near the central axis of the electrode assembly 22 is smaller than the dimension of the receiving groove away from the central axis of the electrode assembly 22. The tab part 222 includes a receiving space, and the support member 25 is at least partially located within the receiving space. Along the first direction X, the support member 25 is spaced apart from the main body 221. The battery cell 20 also includes a protective component 27, at least a portion of which is located between the main body 221 and the housing assembly 26 and covers the main body 221. The inner surface of the housing assembly 26 is coated with an insulating coating 28, which completely covers the orthographic projection of the support component 25 onto the housing assembly 26 along the second direction Y.

[0169] According to the embodiments of this application, the support member 25 can cover the current collector 24. When the battery cell 20 is impacted, the support member 25 can reduce the risk of short circuit caused by the current collector 24 inserting into the main body 22 or overlapping with the outer casing assembly 26, thereby improving the safety of the battery cell 20.

[0170] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application 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: The housing assembly has a receiving cavity; An electrode assembly is disposed within the receiving cavity. The electrode assembly includes a main body and an electrode tab, with the electrode tab disposed on at least one side of the main body along a first direction. A current collector is electrically connected to the tab portion, and along the first direction, the current collector is at least partially located between the housing assembly and the main body portion; and A support member is located at least partially on the side of the current collector member facing the main body and is disposed around at least a portion of the tab portion.

2. The battery cell according to claim 1, characterized in that, At least a portion of the support member extends beyond the end of the current collecting member along a second direction, which is perpendicular to the first direction.

3. The battery cell according to claim 2, characterized in that, The support component includes a first part and a second part, the first part being located on the side of the current collection member facing the main body, and the second part being located between the current collection member and the outer shell assembly.

4. The battery cell according to claim 3, characterized in that, The second part includes an abutting part and a connecting part. The abutting part is disposed between the housing assembly and the current collecting member along the first direction. The connecting part connects the abutting part and the first part. Along the first direction, the abutting part abuts against the housing assembly and the current collecting member.

5. The battery cell according to claim 4, characterized in that, The battery cell also includes an insulating component for isolating the current collector and the housing assembly. Along a first direction, the insulating component is located between the housing assembly and the abutment portion and abuts against the housing assembly and the abutment portion.

6. The battery cell according to claim 4 or 5, characterized in that, The abutting part, the connecting part, and the first part together form a receiving groove, and the flow collecting member is at least partially disposed in the receiving groove.

7. The battery cell according to claim 6, characterized in that, The housing assembly includes a housing and electrode terminals. The electrode terminals are disposed on the housing and include a current collection connection portion. Along the first direction, at least a portion of the current collection connection portion is located between the housing and the current collection member. Along the second direction, the current collection member extends beyond the current collection connection portion.

8. The battery cell according to claim 7, characterized in that, Along the second direction, the abutting portion and the current collection connection portion are spaced apart.

9. The battery cell according to claim 6, characterized in that, The first part and at least one of the abutting parts are connected to the connecting part by a rounded corner.

10. The battery cell according to claim 6, characterized in that, Along the second direction, the size of the abutting portion is larger than the size of the first portion.

11. The battery cell according to claim 6, characterized in that, Along the first direction, the dimension of the receiving groove near the central axis of the electrode assembly is smaller than the dimension of the receiving groove away from the central axis of the electrode assembly.

12. The battery cell according to claim 6, characterized in that, The first part, the second part, and the connecting part are integrally formed.

13. The battery cell according to claim 1, characterized in that, in, The electrode assembly also includes a receiving space, and the support member is at least partially located within the receiving space.

14. The battery cell according to claim 13, characterized in that, The electrode portion includes a first electrode portion. Along the second direction, the size of the first electrode portion is smaller than the size of the main body portion. The surface of the first electrode portion facing the outer shell assembly along the second direction and the surface of the main body portion facing the outer shell assembly along the first direction together form the receiving space. The second direction is perpendicular to the first direction.

15. The battery cell according to claim 14, characterized in that, Along the first direction, the support member is spaced apart from the main body.

16. The battery cell according to claim 13, characterized in that, The electrode portion includes a first electrode portion and a second electrode portion, the second electrode portion surrounding the outside of the first electrode portion. Along the first direction, the size of the first electrode portion is larger than the size of the second electrode portion. The surface of the first electrode portion facing the housing assembly along the second direction and the surface of the second electrode portion facing the housing assembly along the first direction together form the receiving space. The second direction is perpendicular to the first direction.

17. The battery cell according to claim 16, characterized in that, Along the first direction, the support member is spaced apart from the second electrode ear.

18. The battery cell according to claim 1, characterized in that, The battery cell also includes a protective component, at least a portion of which is located between the main body and the housing assembly and covers the main body.

19. The battery cell according to claim 18, characterized in that, The protective component also covers at least a portion of the electrode tab, and along a second direction, at least a portion of the protective component is located between the electrode tab and the support component, the second direction being perpendicular to the first direction.

20. The battery cell according to claim 19, characterized in that, The protective component also covers at least a portion of the current collector, with at least a portion of the protective component located on the side of the current collector away from the electrode assembly.

21. The battery cell according to claim 18, characterized in that, The protective component also covers at least a portion of the supporting component.

22. The battery cell according to claim 1, characterized in that, The supporting component includes insulating material.

23. The battery cell according to claim 1, characterized in that, The support component comprises an elastic material.

24. The battery cell according to claim 1, characterized in that, Along a second direction, at least a portion of the support member abuts against the housing assembly, the second direction being perpendicular to the first direction.

25. The battery cell according to any one of claims 1-24, characterized in that, The inner surface of the housing assembly is coated with an insulating coating, and the insulating coating is at least partially disposed on the side of the support member facing the housing assembly along a second direction, the second direction being perpendicular to the first direction.

26. The battery cell according to claim 25, characterized in that, in, Along the second direction, the insulating coating completely covers the orthographic projection of the support member onto the housing assembly.

27. A battery device, characterized in that, in, Includes the battery cell as described in any one of claims 1-26.

28. An electrical appliance, characterized in that, in, Includes the battery device as described in claim 27, the battery device being used to provide electrical energy.

Images