Battery confluence plate and battery

Abstract

The utility model relates to a battery bus plate and a battery. A bus plate main body in the battery bus plate is connected with a positive pole lug; the conductive handle group comprises at least two conductive handles; the conductive handles are respectively connected with the convergence plate main body and are connected with the cap, so that the charging and discharging requirements of the battery under high magnification can be met, and the over-current capability and the reliability of the battery convergence plate are improved. The at least two conductive handles are arranged on the confluence plate main body, and current flows to the roll core from each conductive handle through the confluence plate main body at the same time, so that the maximum current bearing degree of the battery is increased, the heat dissipation efficiency of the conductive handles is improved, overhigh temperature rise at the tab during charging and discharging of the battery is avoided, the heat release condition of the battery is improved, and the service life of the battery is prolonged. And the risk that the tabs of the battery are fused at a high rate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery busbar and a battery. Background Art

[0002] A cylindrical battery stores and releases electrical energy through a chemical reaction between a positive electrode and a negative electrode. During the charging process of the cylindrical battery, the positive electrode material receives electrons through an external circuit, and at the same time moves towards the negative electrode through ions in the electrolyte, and undergoes a reduction reaction with the negative electrode material to store electrical energy. During the discharging process of the cylindrical battery, the negative electrode material releases electrons through an external circuit, and at the same time the ions in the electrolyte move towards the positive electrode and undergo an oxidation reaction with the positive electrode material to release electrical energy.

[0003] In a cylindrical battery, a busbar is usually arranged at the end of the wound core to connect the busbar to the positive electrode of the wound core. As the high-rate discharge requirement of the cylindrical battery is getting higher and higher, the requirement for the current-carrying capacity of the busbar is also getting higher and higher. At present, the traditional busbar setting method usually adopts busbars with different porosities, widths or thicknesses. However, when the cylindrical battery discharges at a large current, the temperature rise at the tab connecting the busbar is still relatively high, and the tab is prone to fuse at a large current, increasing the safety risk of the battery. Summary of the Utility Model

[0004] Based on this, a battery busbar and a battery are provided.

[0005] In a first aspect, the present application provides a battery busbar, including:

[0006] A busbar main body for connecting the positive electrode tab;

[0007] A conductive handle group including at least two conductive handles; each conductive handle is respectively connected to the busbar main body, and each conductive handle is used for connecting a cap.

[0008] In one embodiment, the busbar main body is provided with a first connection area and a second connection area;

[0009] The first connection area is connected to the positive electrode tab, and the second connection area is connected to each conductive handle; the thermal conductivity of the second connection area is greater than that of the first connection area.

[0010] In one embodiment, the first connection area is provided with a first connection layer for connecting the positive electrode tab;

[0011] The second connection area is provided with a second connection layer for connecting each conductive handle, and the thermal conductivity of the second connection layer is greater than that of the first connection layer.

[0012] In one embodiment, the conductive handle is provided with a third connection area and a fourth connection area; the third connection area is connected to the main body of the current collector plate, and the fourth connection area is connected to the cap; the thermal conductivity of the fourth connection area is greater than that of the third connection area.

[0013] In one embodiment, the third connection area is provided with a third connection layer for connecting the main body of the current collector plate;

[0014] The fourth connection area is provided with a fourth connection layer for connecting the cap, and the thermal conductivity of the fourth connection layer is greater than that of the third connection layer.

[0015] In one embodiment, the conductive handle includes at least two conductive parts, and the conductive parts are connected in sequence, and a preset angle is formed between two adjacent conductive parts.

[0016] In one embodiment, the conductive handle further includes at least one bending part, and the bending part is arranged between two adjacent conductive parts.

[0017] In one embodiment, the end of the fourth connection area is in an arc shape, a trapezoidal shape, a square shape or a conical shape.

[0018] In one embodiment, the main body of the current collector plate is provided with a first through hole for communicating with the winding core.

[0019] In a second aspect, the present application provides a battery, including a cap, a positive electrode tab and the battery current collector plate as described in any one of the above; the cap and the positive electrode tab are respectively connected to the battery current collector plate.

[0020] One of the above technical solutions has the following advantages and beneficial effects:

[0021] In the above battery current collector plate, it includes a main body of the current collector plate and a conductive handle group. The main body of the current collector plate is used to connect the positive electrode tab; the conductive handle group includes at least two conductive handles; each conductive handle is respectively connected to the main body of the current collector plate, and each conductive handle is used to connect the cap, thereby being able to meet the charge and discharge requirements of the battery at high rates, improving the current-carrying capacity and reliability of the battery current collector plate. By providing at least two conductive handles on the main body of the current collector plate in the present application, the current can flow from each conductive handle through the main body of the current collector plate to the winding core simultaneously, increasing the maximum current-bearing degree of the battery, being able to improve the heat dissipation efficiency of the conductive handle, avoiding excessive temperature rise at the tab during battery charge and discharge, improving the heat release situation of the battery, and thus reducing the safety risk of tab melting at high rates of the battery. Description of the Drawings

[0022] Figure 1 It is the first structural schematic diagram of the battery current collector plate in the embodiment of the present application;

[0023] Figure 2 Corresponding to Figure 1Schematic diagram of the first decomposition structure;

[0024] Figure 3 corresponding to Figure 1 Schematic diagram of the second decomposition structure;

[0025] Figure 4 Schematic diagram of the second structure of the battery busbar in the embodiment of the present application;

[0026] Figure 5 Schematic diagram of the third structure of the battery busbar in the embodiment of the present application;

[0027] Figure 6 Schematic diagram of the structure of the conductive handle in the embodiment of the present application.

[0028] Reference numerals:

[0029] 10. Busbar main body; 110. First connection area; 112. First connection layer; 120. Second connection area; 122. Second connection layer; 130. First through hole; 20. Conductive handle group; 210. Conductive handle; 220. Third connection area; 222. Third connection layer; 230. Fourth connection area; 232. Fourth connection layer; 240. Conductive part; 250. Bending part. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation or be constructed and operated in a specific orientation.

[0033] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0034] In addition, the meaning of the term "a plurality of" shall be two or more.

[0035] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0036] In one embodiment, as Figure 1 shown, a battery bus bar is provided, which includes a bus bar main body 10 and a conductive handle group 20. The bus bar main body 10 is used to connect the positive electrode tab; the conductive handle group 20 includes at least 2 conductive handles 210; each conductive handle 210 is respectively connected to the bus bar main body 10, and each conductive handle 210 is used to connect the cap.

[0037] Among them, the battery bus bar can be applied to cylindrical batteries, and the cylindrical battery can be but is not limited to a cylindrical lithium-ion battery. The cylindrical battery may include a wound core, and the wound core may include a separator, a positive electrode plate, and a negative electrode plate. For example, the separator, the positive electrode plate, and the negative electrode plate are formed into a cylindrical wound core by winding. A positive electrode tab is provided on the wound core. The cylindrical battery may further include a cap, and the cap is used to cover the positive electrode tab provided above the wound core. The cap is a conductive metal cap. For example, the cap can be a copper material cap, and for another example, the cap can also be a cap made of copper alloy and other materials. It should be noted that in order to improve the heat dissipation efficiency of the battery, a metal cap with a higher thermal conductivity coefficient can be selected for the cap.

[0038] The shape and size of the busbar body 10 are determined according to the shape and size of the core. For example, the busbar body 10 can be in a disc-shaped structure. The busbar body 10 can be arranged above the core, and the busbar body 10 is electrically connected to the positive electrode tab. In order to improve the welding effect and welding firmness between the busbar body 10 and the positive electrode tab, the material of the busbar body 10 corresponds to the material of the positive electrode tab. For example, if the positive electrode tab is made of aluminum, then the busbar body 10 is a busbar body 10 made of aluminum. Exemplarily, the busbar body 10 has opposite first and second surfaces, and the first surface of the busbar body 10 can be connected to the positive electrode tab by welding. Also, by providing an adhesive layer on the first surface of the busbar body 10, the first surface of the busbar body 10 can be firmly connected to the positive electrode tab by heating or ultrasonic means, etc., to avoid virtual soldering or detachment between the busbar body 10 and the positive electrode tab.

[0039] The conductive handle group 20 can include at least two conductive handles 210, and the shapes and sizes of the respective conductive handles 210 are the same. The conductive handle 210 can be in a sheet-like structure. The conductive handle 210 can be a pipe-shaped metal conductive handle 210 with certain elasticity and conductivity. For example, the conductive handle 210 can be a conductive handle 210 made of copper or copper alloy material, etc. One end of the conductive handle 210 is electrically connected to the busbar body 10, and the other end of the conductive handle 210 is electrically connected to the cap. Usually, the cap is located above the busbar body 10, and then the conductive handle 210 can be bent and electrically connected to the cap.

[0040] Based on the connection between the busbar body 10 and the positive electrode tab, and each conductive handle 210 connecting the busbar body 10 and the cap, then in the energized state, the current can be transmitted to the busbar body 10 through the cap and each conductive handle 210 in sequence, and the current is transmitted to the positive electrode tab through the busbar body 10. Further, the current is input into the core through the positive electrode tab, forming a battery charging circuit, thereby increasing the maximum current bearing capacity of the battery and improving the overcurrent capacity of the busbar.

[0041] In the above embodiments, the busbar body 10 is used to connect the positive electrode tab; the conductive handle group 20 includes at least two conductive handles 210; each conductive handle 210 is respectively connected to the busbar body 10, and each conductive handle 210 is used to connect the cap, thereby being able to meet the charge and discharge requirements of the battery at high rates, and improving the overcurrent capacity and reliability of the battery busbar. In this application, by providing at least two conductive handles 210 on the busbar body 10, the current can flow from each conductive handle 210 through the busbar body 10 to the core simultaneously, increasing the maximum current bearing degree of the battery, being able to improve the heat dissipation efficiency of the conductive handle 210, avoiding excessive temperature rise at the tab during battery charge and discharge, improving the heat release situation of the battery, and thus reducing the safety risk of tab melting at high rates of the battery.

[0042] Exemplarily, the thermal conductivity of the conductive handle group 20 can be set to be greater than that of the busbar main body 10. For example, usually, the material of the positive electrode tab is aluminum, and the material of the cap is copper. Then, the conductive handle group 20 made of copper is used for the conductive handle group 20, and the busbar main body 10 made of aluminum is used for the busbar main body 10. The thermal conductivity of copper is 401 W / m·K, and the thermal conductivity of aluminum is 237 W / m·K. The thermal conductivity of copper is greater than that of aluminum. Furthermore, it is convenient to electrically connect the busbar main body 10 to the positive electrode tab, improving the connection firmness and reliability between the busbar main body 10 and the positive electrode tab, and it is also convenient to electrically connect the conductive handle group 20 to the cap, improving the connection firmness and reliability between the conductive handle group 20 and the cap. At the same time, it can improve the heat dissipation efficiency of the busbar and reduce the temperature rise at the tab during battery charging and discharging.

[0043] In one embodiment, as Figure 2 shown, the busbar main body 10 is provided with a first connection area 110 and a second connection area 120; the first connection area 110 is connected to the positive electrode tab, and the second connection area 120 is connected to each conductive handle 210; the thermal conductivity of the second connection area 120 is greater than that of the first connection area 110.

[0044] Among them, the busbar main body 10 can be a busbar main body 10 made of a composite material. For example, the first connection area 110 is provided on the first surface of the busbar main body 10, and the second connection area 120 is provided on the second surface of the busbar main body 10. The positive electrode tab can be electrically connected to the first connection area 110 by welding or other means. Exemplarily, the first connection area 110 is a connection area made of aluminum, and the positive electrode tab is a positive electrode tab made of aluminum. Each conductive handle 210 can be electrically connected to the second connection area 120 of the busbar main body 10 by welding. Exemplarily, the second connection area 120 is a connection area made of copper, and the conductive handle 210 is a conductive handle 210 made of copper. In another example, each conductive handle 210 can also be arranged in the second connection area 120 of the busbar main body 10 by forging or other means to realize the electrical connection between each conductive handle 210 and the busbar main body 10.

[0045] By setting the thermal conductivity of the second connection area 120 to be greater than that of the first connection area 110, it is convenient to electrically connect the first connection area 110 of the busbar main body 10 to the positive electrode tab, improving the connection firmness and reliability between the first connection area 110 of the busbar main body 10 and the positive electrode tab, and it is also convenient to electrically connect each conductive handle 210 to the second connection area 120 of the busbar main body 10, improving the connection firmness and reliability between the conductive handle 210 and the second connection area 120 of the busbar main body 10. At the same time, it can improve the heat dissipation efficiency of the busbar, reduce the temperature rise at the tab during battery charging and discharging, improve the heat release situation of the battery, and thus reduce the safety risk of tab melting at high rates of the battery.

[0046] In one embodiment, as Figure 2 shown, a first connection layer 112 is provided in the first connection area 110. The first connection layer 112 is used to connect the positive electrode tab; a second connection layer 122 is provided in the second connection area 120. The second connection layer 122 is used to connect each conductive handle 210, and the thermal conductivity of the second connection layer 122 is greater than that of the first connection layer 112.

[0047] For example, the first connection layer 112 can be a connection layer made of aluminum material, and the busbar body 10 can be a busbar body 10 made of copper material. The first connection layer 112 can be provided in the first connection area 110 of the busbar body 10 by means of forging or the like, so that the positive electrode tab can be electrically connected to the first connection layer 112 by means of welding or the like, and further the electrical connection between the positive electrode tab and the busbar body 10 can be realized.

[0048] For example, the second connection layer 122 can be a connection layer made of copper material. The second connection layer 122 can be provided in the second connection area 120 of the busbar body 10 by means of welding or the like, so that the conductive handle 210 can be electrically connected to the second connection layer 122 by means of welding or the like, and further the electrical connection between each conductive handle 210 and the busbar body 10 can be realized. Exemplarily, the thermal conductivity of the second connection layer 122 can be set to be greater than that of the first connection layer 112, so as to facilitate the connection between the first connection area 110 of the busbar body 10 and the positive electrode tab, and the connection between the second connection area 120 of the busbar body 10 and each conductive handle 210, improve the assembly convenience, and at the same time can further increase the overall heat dissipation area of the busbar, thereby improving the heat dissipation efficiency of the tabs during battery charging and discharging, avoiding excessive temperature rise at the tabs during battery charging and discharging, improving the heat release condition of the battery, and thus reducing the safety risk of tab fusing at high rates of the battery.

[0049] In one embodiment, as Figure 3 shown, the conductive handle 210 is provided with a third connection area 220 and a fourth connection area 230; the third connection area 220 is connected to the busbar body 10, and the fourth connection area 230 is connected to the cap; the thermal conductivity of the fourth connection area 230 is greater than that of the third connection area 220.

[0050] The conductive handle 210 may be a conductive handle 210 of a composite material, for example, the conductive handle 210 is in a long sheet structure, the first end of the conductive handle 210 is provided with a third connection area 220, the second end of the conductive handle 210 is provided with a fourth connection area 230, the busbar body 10 may be electrically connected to the third connection area 220 by welding or the like, for example, the third connection area 220 is an aluminum connection area, the busbar body 10 is an aluminum busbar body 10, thereby facilitating the electrical connection between the busbar body 10 and the third connection area 220 of the conductive handle 210, and improving the convenience of assembly. The cap may be electrically connected to the fourth connection area 230 of the conductive handle 210 by welding or the like, for example, the fourth connection area 230 is a copper connection area, the cap is a copper cap, thereby facilitating the electrical connection between the cap and the fourth connection area 230 of the conductive handle 210, and improving the convenience of assembly. In another example, the busbar body 10 may also be disposed on the third connection region 220 of the conductive handle 210 by forging, so as to achieve electrical connection between the conductive handle 210 and the busbar body 10 .

[0051] By setting the thermal conductivity of the fourth connection area 230 to be greater than the thermal conductivity of the third connection area 220, it is convenient to electrically connect the third connection area 220 of the conductive handle 210 to the busbar body 10, thereby improving the connection firmness and reliability between the third connection area 220 of the conductive handle 210 and the busbar body 10, and it is convenient to electrically connect the fourth connection area 230 of the conductive handle 210 to the cap, thereby improving the connection firmness and reliability between the fourth connection area 230 of the conductive handle 210 and the cap, and at the same time, it can improve the overall heat dissipation efficiency of the busbar, reduce the temperature rise at the pole ear of the battery during charging and discharging, improve the heat release of the battery, and thus reduce the safety risk of the pole ear melting at a high rate.

[0052] In one embodiment, Figure 3 As shown, the third connection area 220 is provided with a third connection layer 222, and the third connection layer 222 is used to connect the busbar body 10; the fourth connection area 230 is provided with a fourth connection layer 232, and the fourth connection layer 232 is used to connect the cap, and the thermal conductivity of the fourth connection layer 232 is greater than the thermal conductivity of the third connection layer 222.

[0053] For example, the busbar body 10 can be a busbar body 10 made of copper, and the third connecting layer 222 can be a connecting layer made of aluminum. The third connecting layer 222 can be set in the third connecting area 220 of the conductive handle 210 by forging or the like, so that the busbar body 10 can be electrically connected to the third connecting layer 222 by welding or the like, thereby realizing the electrical connection between the conductive handle 210 and the busbar body 10.

[0054] For example, the cap can be a copper cap, the fourth connection layer 232 can be a copper connection layer, and the fourth connection layer 232 can be disposed in the fourth connection region 230 of the conductive handle 210 by means of welding or the like, so that the cap can be electrically connected to the fourth connection layer 232 by means of welding or the like, thereby realizing the electrical connection between the conductive handle 210 and the cap. By setting the thermal conductivity of the fourth connection layer 232 to be greater than or equal to the thermal conductivity of the third connection layer 222, it is convenient to connect between the main body 10 of the bus bar and the third connection region 220 of the conductive handle 210, and between the fourth connection region 230 of the conductive handle 210 and the cap, improving the assembly convenience. At the same time, it can further increase the overall heat dissipation area of the bus bar, thereby improving the heat dissipation efficiency of the tab during battery charging and discharging, avoiding excessive temperature rise at the tab during battery charging and discharging, improving the heat release condition of the battery, and thus reducing the safety risk of tab fusing at high rates of the battery.

[0055] In one embodiment, as Figure 6 shown, the conductive handle 210 includes at least two conductive parts 240, and the conductive parts 240 are connected in sequence, and a preset angle is formed between two adjacent conductive parts 240.

[0056] Among them, each conductive part 240 is an integrally formed structure. For example, the conductive handle 210 may include three conductive parts 240, and the three conductive parts 240 are connected in series, and a preset angle is formed between two adjacent conductive parts 240, so that within a certain space volume, the length of the conductive handle 210 is increased, thereby increasing the heat dissipation area of the conductive handle 210, so as to improve the heat dissipation efficiency of the conductive handle 210, avoid excessive temperature rise at the tab during battery charging and discharging, improve the heat release condition of the battery, and reduce the safety risk of tab fusing at high rates of the battery. Exemplarily, the range of the preset angle between two adjacent conductive parts 240 can be greater than 10 degrees and less than 150 degrees.

[0057] In one embodiment, as Figure 6 shown, the conductive handle 210 further includes at least one bending part 250, and the bending part 250 is disposed between two adjacent conductive parts 240.

[0058] Among them, the bending part 250 can be in an arc shape, and an integrally formed structure can be formed between two adjacent conductive parts 240 and the bending part 250. By setting the bending part 250 between two adjacent conductive parts 240, the overall shape of the conductive handle 210 is in a wave shape, thereby increasing the length of the conductive handle 210 per unit volume, and thus increasing the heat dissipation area of the conductive handle 210. In addition, by providing the bending part 250 on the conductive handle 210, it is beneficial to bend the conductive handle 210 and connect it to the cap, improving the assembly convenience of the battery bus bar.

[0059] In one embodiment, as Figure 4 andFigure 5 As shown, the end of the fourth connection region 230 is in an arc shape, trapezoidal shape, square shape or conical shape.

[0060] Among them, the fourth connection region 230 is arranged at the second end of the conductive handle 210, and the end of the fourth connection region 230 refers to the side of the second end of the conductive handle 210. Exemplarily, for a square-shaped cap, the end of the fourth connection region 230 can be set to a square shape; in another example, for a circular-shaped cap, the end of the fourth connection region 230 can also be set to an arc shape, trapezoidal shape or conical shape, thereby facilitating welding the fourth connection region 230 of the conductive handle 210 to the cap, and at the same time reducing the area blocked by the conductive handle 210, avoiding blocking the orifice plate part of the cap, and improving the reliability and convenience of the connection between the conductive handle 210 and the cap.

[0061] In one embodiment, as Figure 1 , Figure 4 and Figure 5 shown, the current collector plate body 10 is provided with a first through hole 130 for communicating with the winding core.

[0062] Among them, the first through hole 130 can be used to facilitate the injection of electrolyte into the winding core. The first through hole 130 can be in a circular hole shape and can be arranged at the central part of the current collector plate body 10. By arranging the current collector plate body 10 on the first through hole 130 and arranging the current collector plate body 10 on the winding core, the first through hole 130 communicates with the winding core, and then the electrolyte is injected into the winding core through the first through hole 130.

[0063] In one embodiment, the present application provides a battery, including a cap, a positive electrode tab and a battery current collector plate as described in any one of the above; the cap and the positive electrode tab are respectively connected to the battery current collector plate.

[0064] For the specific description content of the cap, the positive electrode tab and the battery current collector plate, reference can be made to the specific description of the cap, the positive electrode tab and the battery current collector plate in the above embodiments, and details are not described herein again.

[0065] The battery current collector plate is a positive current collector plate, and the battery current collector plate includes a current collector plate body and a conductive handle group. The current collector plate body is used to connect the positive electrode tab; the conductive handle group includes at least two conductive handles; each conductive handle is respectively connected to the current collector plate body, and each conductive handle is used to connect the cap, thereby being able to meet the charge and discharge requirements of the battery at high rates and improving the current-carrying capacity and reliability of the battery current collector plate.

[0066] In the above embodiments, by providing at least two conductive handles on the busbar body, current can flow from each conductive handle through the busbar body to the core simultaneously, increasing the maximum current-carrying capacity of the battery, improving the heat dissipation efficiency of the conductive handles, avoiding excessive temperature rise at the tab during battery charging and discharging, improving the heat release condition of the battery, and thus reducing the safety risk of tab fusing at high rates.

[0067] It should be noted that the battery may further include components such as the negative tab. Specifically, the battery may include more components than those described in the above embodiments, or combine certain components, or have different component arrangements.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0069] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery bus bar, characterized in that, Comprising: A busbar main body for connecting the positive electrode tab; A conductive handle group including at least two conductive handles; each of the conductive handles is respectively connected to the busbar main body, and each of the conductive handles is used for connecting the cap.

2. The battery busbar according to claim 1, characterized in that, The busbar main body is provided with a first connection area and a second connection area; The first connection area is connected to the positive electrode tab, and the second connection area is connected to each of the conductive handles; the thermal conductivity of the second connection area is greater than that of the first connection area.

3. The battery busbar according to claim 2, wherein, The first connection area is provided with a first connection layer for connecting the positive electrode tab; The second connection area is provided with a second connection layer for connecting each of the conductive handles, and the thermal conductivity of the second connection layer is greater than that of the first connection layer.

4. The battery busbar according to claim 1, characterized in that, The conductive handle is provided with a third connection area and a fourth connection area; the third connection area is connected to the busbar main body, and the fourth connection area is connected to the cap; the thermal conductivity of the fourth connection area is greater than that of the third connection area.

5. The battery busbar according to claim 4, wherein, The third connection area is provided with a third connection layer for connecting the busbar main body; The fourth connection area is provided with a fourth connection layer for connecting the cap, and the thermal conductivity of the fourth connection layer is greater than that of the third connection layer.

6. The battery busbar according to claim 1, wherein, The conductive handle includes at least two conductive parts, and the conductive parts are connected in sequence, and a preset angle is formed between two adjacent conductive parts.

7. The battery busbar according to claim 6, wherein The conductive handle further includes at least one bending part, and the bending part is arranged between two adjacent conductive parts.

8. The battery busbar according to claim 4, characterized in that, The end of the fourth connection area is in an arc shape, a trapezoidal shape, a square shape or a conical shape.

9. The battery busbar according to any one of claims 1 to 8, characterized in that The busbar main body is provided with a first through hole for communicating with the winding core.

10. A battery, characterized in that, Comprising a cap, a positive electrode tab and the battery busbar according to any one of claims 1 to 9; the cap and the positive electrode tab are respectively connected to the battery busbar.

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