Battery cell stacking structure and battery

Abstract

The utility model provides a battery cell stacking structure and a battery. The battery cell stacking structure comprises a plurality of battery cells stacked in sequence, a tab base and a tab fixing piece, each battery cell comprises a positive electrode lug and a negative electrode lug which are arranged at an interval; the tab base comprises a first through hole for a positive tab to pass through and a second through hole for a negative tab to pass through; the part, penetrating through the first through hole, of the positive pole lug is bent on the pole lug base; and the part, penetrating through the second through hole, of the negative pole lug is bent on the pole lug base, so that the height of the pole lug extending out of the pole lug base can be reduced, the space is effectively saved, and the compactness of the whole structure is enhanced. In order to further improve the stability and the connection reliability of the tabs, the tab fixing piece is pressed against the part, penetrating through the first through hole, of the positive tab, and is also pressed against the part, penetrating through the second through hole, of the negative tab. And through the close fit with the tab base, the tab fixing piece realizes the clamping effect on the positive tab and the negative tab.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and more specifically, relates to a battery cell stacking structure and a battery. Background Art

[0002] In the current technical field of batteries, the tab design of battery cells and their connection methods have important impacts on the overall performance, safety, and manufacturing cost of batteries. Traditional battery cell tab designs usually involve punching holes in each tab and connecting and fixing each pair of battery cell tabs with screws. Although this design ensures the stability and reliability of the connection to a certain extent, it also brings various problems at the same time.

[0003] First of all, two holes need to be punched in each tab. This step not only increases the complexity of the manufacturing process, but also may lead to waste of tab materials and an increase in processing costs. At the same time, the tab material may be damaged to a certain extent during the punching process, affecting the overall performance of the battery. Secondly, two screws are used to connect and fix each pair of battery cell tabs. Although the firmness of the connection is ensured, the use of screws also increases the complexity and time cost of assembly. In addition, the screw connection method may also cause local stress concentration, increasing the risk of battery failure during long-term use. Moreover, the upright design of the battery cell tabs increases the height of the entire battery pack. This not only limits the layout flexibility of the battery in a limited space, but also may have an adverse impact on the weight and energy consumption of the whole vehicle. Especially in applications such as electric vehicles, the increase in the height of the battery pack will directly affect the vehicle's cruising range and driving stability. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide a battery cell stacking structure and a battery to solve the technical problem in the prior art that the tabs increase the height of the entire battery pack.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] Provide a battery cell stacking structure, including:

[0007] A plurality of battery cells stacked in sequence, each of the battery cells includes a positive tab and a negative tab arranged at intervals;

[0008] A tab base, including a first through hole for the positive tab to pass through and a second through hole for the negative tab to pass through; the part of the positive tab passing through the first through hole is bent on the tab base; the part of the negative tab passing through the second through hole is bent on the tab base;

[0009] The tab fixing member presses against the part of the positive tab passing through the first through hole and / or the part of the negative tab passing through the second through hole, so as to form a clamping force on the positive tab and / or the negative tab together with the tab base.

[0010] As a further improvement of the above technical solution:

[0011] Optionally, in adjacent battery cells, the positive tabs in pairs pass through the same first through hole, and the negative tabs in pairs pass through the same second through hole.

[0012] Optionally, the tab base includes a first through hole group and a second through hole group arranged at intervals. The first through hole group includes a plurality of the first through holes arranged in sequence along a straight line direction, and the second through hole group includes a plurality of the second through holes arranged in sequence along a straight line direction.

[0013] Optionally, the first through holes of the first through hole group and the second through holes of the second through hole group are arranged staggeredly from each other.

[0014] Optionally, a tab groove is provided at the edge of the tab base. The part of the positive tab and / or the negative tab of the battery cell located at the end passing through the tab groove is bent on the tab base.

[0015] Optionally, the tab fixing member is detachably connected to the tab base.

[0016] Optionally, a fastener is further included. Fastening holes are provided beside each of the first through holes and the second through holes. After the fastener passes through the tab fixing member, it is threadedly connected to the fastening hole.

[0017] Optionally, an avoidance groove is provided on the positive tab and / or the negative tab, and the avoidance groove is used to avoid the connection between the fastener and the fastening hole.

[0018] A battery includes a housing and the above-mentioned battery cell stacking structure.

[0019] The beneficial effects of the battery cell stacking structure and the battery provided by this application are as follows:

[0020] The battery cell stacking structure provided by the present application includes a plurality of battery cells stacked in sequence, a tab base, and a tab fixing member. Each battery cell includes a positive tab and a negative tab arranged at intervals; the tab base includes a first through hole for the positive tab to pass through and a second through hole for the negative tab to pass through; the part of the positive tab passing through the first through hole is bent on the tab base; the part of the negative tab passing through the second through hole is bent on the tab base, thereby being able to reduce the height of the tab protruding from the tab base, effectively saving space and enhancing the compactness of the overall structure. In order to further improve the stability and connection reliability of the tabs, the tab fixing member presses against the part of the positive tab passing through the first through hole and also presses against the part of the negative tab passing through the second through hole. Through close cooperation with the tab base, the tab fixing member achieves the clamping effect on the positive tab and the negative tab, not only effectively preventing the loosening and falling off of the tabs under vibration or external force, but also greatly improving the stability and safety of the electrical connection. The battery cell stacking structure provided by the present application not only achieves a high space utilization rate and structural compactness, but also ensures the stable and reliable electrical connection, providing a strong guarantee for the high-performance performance of the battery pack.

[0021] The battery provided by the present application includes a housing and the above battery cell stacking structure. Therefore, it also has the advantages of the above battery cell stacking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is a schematic perspective view of the battery cell stacking structure provided by the present application;

[0024] Figure 2 is a schematic front view of the battery cell of the battery cell stacking structure provided by the present application;

[0025] Figure 3 is a schematic front view of the tab base of the battery cell stacking structure provided by the present application.

[0026] Among them, the reference numerals in the drawings are as follows:

[0027] 1. Battery cell; 11. Positive tab;

[0028] 12. Negative tab; 2. Tab base;

[0029] 21. First through hole; 22. Second through hole;

[0030] 23. Tab groove; 24. Fastening hole;

[0031] 3. Tab fixing member; 4. Fastener;

[0032] 5. Avoidance groove. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0037] As Figure 1 and Figure 2 shown, the present application provides a battery cell stacking structure, including a plurality of battery cells 1, tab bases 2 and tab fixing members 3 stacked in sequence.

[0038] Each battery cell 1 includes a positive electrode tab 11 and a negative electrode tab 12 arranged at intervals; the tab base 2 includes a first through hole 21 for the positive electrode tab 11 to pass through and a second through hole 22 for the negative electrode tab 12 to pass through; the part of the positive electrode tab 11 passing through the first through hole 21 is bent on the tab base 2; the part of the negative electrode tab 12 passing through the second through hole 22 is bent on the tab base 2, so that the height of the tab protruding from the tab base 2 can be reduced, effectively saving space and enhancing the compactness of the overall structure. In order to further improve the stability and connection reliability of the tabs, the tab fixing member 3 presses against the part of the positive electrode tab 11 passing through the first through hole 21 and also presses against the part of the negative electrode tab 12 passing through the second through hole 22. Through the close cooperation with the tab base 2, the tab fixing member 3 realizes the clamping effect on the positive electrode tab 11 and / or the negative electrode tab 12, which not only effectively prevents the loosening and falling off of the tabs under vibration or external force, but also greatly improves the stability and safety of the electrical connection.

[0039] The battery cell stacking structure provided by this application not only realizes high space utilization rate and structural compactness, but also ensures stable and reliable electrical connection, providing a strong guarantee for the high-performance performance of the battery pack.

[0040] In an embodiment of this application, among adjacent battery cells 1, pairs of positive electrode tabs 11 pass through the same first through hole 21, and correspondingly, pairs of negative electrode tabs 12 pass through the same second through hole 22. This layout reduces the demand for tab fixing members 3 because each pair of tabs shares a through hole and is stabilized through a common fixing point, eliminating the need for a separate fixing member for each tab. This not only reduces production costs, but also simplifies the production process and improves assembly efficiency. Secondly, by reducing the clamping steps, the production cycle is further shortened and the complexity of manual operation is reduced.

[0041] As Figure 3 shown, in an embodiment of this application, the tab base 2 includes a first through hole group and a second through hole group arranged at intervals. The first through hole group includes a plurality of first through holes 21 arranged in a straight line, and the second through hole group includes a plurality of second through holes 22 arranged in a straight line.

[0042] As Figure 3 shown, in an embodiment of this application, the first through holes 21 of the first through hole group and the second through holes 22 of the second through hole group are arranged staggeredly. By increasing the physical distance, the potential contact risk between the positive electrode tab 11 and the negative electrode tab 12 is effectively reduced, thus significantly improving the insulation performance of the entire battery cell stacking structure. In addition, the staggered through holes also optimize the heat dissipation performance of the tab base 2. Due to the dispersion of the through hole positions, heat can be more evenly distributed on the base and effectively dissipated through the surrounding medium, reducing the safety hazards caused by local overheating.

[0043] As Figure 3 shown, in an embodiment of the present application, a tab groove 23 is provided at the edge of the tab base 2. The positive tab 11 and / or the negative tab 12 of the battery cell 1 at the end passes through the tab groove 23 and is bent on the tab base 2, so as to facilitate the bending of the tabs of the battery cell 1 at the end.

[0044] In an embodiment of the present application, the tab fixing member 3 is detachably connected to the tab base 2. During the service life of the battery pack, if it is necessary to repair, replace or upgrade the battery cell or the tab for some reason, the detachable tab fixing member 3 will simplify this process. The maintenance personnel do not need to disassemble the entire battery cell stacking structure, and only need to easily remove the relevant tab fixing member 3 to quickly access and process the target battery cell or tab, thereby significantly shortening the maintenance time and reducing the maintenance cost.

[0045] In an embodiment of the present application, the battery cell stacking structure further includes a fastener 4 to further enhance the stability and reliability of the battery cell stacking structure. Fastening holes 24 are provided beside each of the first through holes 21 and the second through holes 22. After the fastener 4 passes through the tab fixing member 3, it is threadedly connected to the fastening hole 24.

[0046] As Figure 2 shown, in an embodiment of the present application, a relief groove 5 is provided on the positive tab 11 and / or the negative tab 12. The relief groove 5 is used to prevent the fastener 4 from accidentally piercing or damaging the tab during the fastening process.

[0047] The present application provides a battery, including a housing and the battery cell stacking structure in the above embodiment. Since this battery includes the battery cell stacking structure in the above embodiment, it also has the advantages of the battery cell stacking structure in the above embodiment.

[0048] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell stacking structure, characterized in that: include: A plurality of battery cells (1) stacked in sequence, each of the battery cells (1) comprising a positive electrode tab (11) and a negative electrode tab (12) arranged at intervals; A tab base (2) comprising a first through hole (21) for a positive tab (11) to pass through and a second through hole (22) for a negative tab (12) to pass through; the portion of the positive tab (11) passing through the first through hole (21) is bent onto the tab base (2); the portion of the negative tab (12) passing through the second through hole (22) is bent onto the tab base (2); The tab fixing member (3) is pressed against the portion of the positive pole tab (11) passing through the first through hole (21) and / or the portion of the negative pole tab (12) passing through the second through hole (22), so as to clamp the positive pole tab (11) and / or the negative pole tab (12) together with the tab base (2).

2. The battery cell stacking structure according to claim 1, characterized in that: In adjacent battery cells (1), pairs of positive electrode tabs (11) pass through the same first through hole (21), and pairs of negative electrode tabs (12) pass through the same second through hole (22).

3. The battery cell stacking structure according to claim 1, characterized in that: The tab base (2) comprises a first through hole group and a second through hole group arranged at intervals, the first through hole group comprising a plurality of first through holes (21) arranged in sequence along a straight line direction, and the second through hole group comprising a plurality of second through holes (22) arranged in sequence along a straight line direction.

4. The battery cell stacking structure according to claim 1, characterized in that: The first through holes (21) of the first through hole group and the second through holes (22) of the second through hole group are arranged staggered with each other.

5. The battery cell stacking structure according to claim 1, characterized in that: A tab groove (23) is provided at the edge of the tab base (2), and the positive tab (11) and / or the negative tab (12) of the battery cell (1) at the end portion, the portion passing through the tab groove (23) is bent onto the tab base (2).

6. The battery cell stacking structure according to claim 1, characterized in that: The tab fixing member (3) is detachably connected to the tab base (2).

7. The battery cell stacking structure according to claim 1, characterized in that: It also includes a fastener (4), and each of the first through hole (21) and the second through hole (22) is provided with a fastening hole (24), and the fastener (4) passes through the tab fixing member (3) and is threadedly connected to the fastening hole (24).

8. The battery cell stacking structure according to claim 1, characterized in that: The positive electrode tab (11) and / or the negative electrode tab (12) is provided with an avoidance groove (5), the avoidance groove (5) being used to avoid the connection between the fastener (4) and the fastening hole (24).

9. A battery, characterized in that: The invention comprises a shell and a battery cell stacking structure as claimed in any one of claims 1 to 8.

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