Battery assembly and battery

Abstract

The utility model provides a battery assembly and a battery, the battery assembly comprises at least two battery cells, the number of the battery cells is at least two, and the plurality of battery cells are superposed along a first direction; the tabs are arranged on all the battery cells; the switching piece is provided with a middle plate section and two connecting plate sections arranged on the middle plate section at intervals in the first direction, the middle plate section is located above the battery cells in the height direction of the battery cells, the connecting plate sections are bent towards one sides of the battery cells, and the two connecting plate sections are electrically connected with the tabs on the two adjacent battery cells respectively. According to the battery assembly and the battery provided by the utility model, the problems in the prior art that the tabs are broken and are difficult to assemble due to the bending of the tabs are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery assembly and a battery. Background Art

[0002] At present, secondary batteries usually include a top cover, a shell, a battery cell, and an adapter. The internal assembly structure of the battery usually includes two types. The first assembly structure is to bend one or more pole ears and set them below or above the adapter and weld them to the adapter. The adapter connected to the pole ears of the battery cell is then welded to the pole column of the top cover. The second assembly structure is to set one or more pole ears below the pole column and directly weld them to the pole column of the top cover. After the pole ears are connected to the pole column, the pole ears are bent and the battery cell is installed in the shell to complete the structural assembly of the secondary battery.

[0003] After the tab is bent, the part where the tab is connected to the adapter or pole (hereinafter referred to as the tab connection part) forms a certain angle with the battery cell (i.e., the tab connection part is not parallel to the height direction of the battery cell), which will cause defects such as tab breakage when the tab connection part is pulled by force. The damage of the tab will increase the internal resistance and cause problems such as short circuit, which will lead to reduced battery performance and affect the safety performance of the secondary battery. In addition, the tab needs to be bent during the installation process, which makes assembly more difficult and affects the production efficiency of the battery. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery assembly and a battery, so as to solve the problem in the prior art that the tab connection part forms a certain angle with the battery core, which causes the tab to break and the difficulty in assembly.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery assembly is provided, which includes: a battery cell, at least two battery cells are provided, and the multiple battery cells are stacked along a first direction; a pole ear, each battery cell is provided with a pole ear, and the pole ear extends along the height direction of the battery cell; a adapter plate, the adapter plate includes a middle plate section and two connecting plate sections arranged on the middle plate section at intervals along the first direction, the middle plate section is located above the battery cell along the height direction of the battery cell, the connecting plate section extends from the middle plate section toward one side of the battery cell, and the two connecting plate sections are respectively fixedly connected to the pole ears on two adjacent battery cells.

[0006] Further, along the first direction, two connecting plate segments are arranged at two ends of the middle plate segment; and / or the connecting plate segments are arranged perpendicular to the middle plate segment.

[0007] Furthermore, two side surfaces of the connecting plate segment are formed into two connecting surfaces, at least one of which is connected to the pole lug.

[0008] Furthermore, an installation space is formed between the pole ears on two adjacent battery cells along the first direction, and the connecting plate section is arranged inside the installation space, and the connecting plate sections are respectively connected to the surfaces of the pole ears facing each other; or an installation space is formed between two adjacent connecting plate sections along the first direction, and two adjacent pole ears are arranged inside the installation space, and the sides of the two pole ears away from each other along the first direction are connected to the connecting plate section.

[0009] Furthermore, each pole lug includes a plurality of metal sheets stacked along a first direction, and two side surfaces of the connecting plate segment along the first direction are in contact with two adjacent metal sheets in the pole lug.

[0010] Furthermore, each pole ear includes a plurality of metal sheets stacked along a first direction, the plurality of metal sheets include long metal sheets and short metal sheets, the metal sheets are connected to the connecting plate section, the long metal sheet has a bent section, the bent section is parallel to the middle plate section and connected to a side of the middle plate section away from the battery cell.

[0011] Further, a plurality of short metal sheets are provided along the first direction, and two side surfaces of the connecting plate segment along the first direction are in contact with two adjacent short metal sheets.

[0012] Furthermore, the battery assembly also includes an insulating member, which covers at least one side surface of the tab along the first direction.

[0013] Furthermore, a portion of the insulating member covers the pole lug, and another portion of the insulating member is connected to the adapter.

[0014] According to another aspect of the utility model, a battery is provided, comprising the above-mentioned battery assembly and pole, wherein the battery cell of the battery assembly is electrically connected to the pole via an adapter.

[0015] By applying the technical solution of the utility model, the following technical effects are achieved:

[0016] 1. The present application adopts the connection plate section of the adapter to connect with the pole ear, and the pole ear connection part is parallel to the height direction of the battery cell, which can avoid the formation of an angle between the pole ear connection part and the battery cell, thereby avoiding the occurrence of pole ear breakage and the like.

[0017] 2. The adapter and the tab of the present application can be welded vertically, which is beneficial to improving the overall assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 An exploded view of the overall structure of the battery assembly provided by the utility model is shown;

[0020] Figure 2 A side view of a battery assembly provided by the utility model is shown;

[0021] Figure 3 A top view of a battery assembly provided by the utility model is shown;

[0022] Figure 4 A schematic diagram of the adapter provided by the utility model is shown;

[0023] Figure 5 A schematic diagram showing the adapter provided by the utility model is inserted into a pole ear;

[0024] Figure 6 A schematic diagram showing the adapter provided by the utility model is inserted into the tab and the tape is arranged;

[0025] Figure 7 A schematic diagram showing that the adapter provided by the utility model is inserted into the pole ear and the pole ear is partially bent;

[0026] Figure 8 A schematic diagram showing the adapter provided by the utility model is inserted into the pole ear, the pole ear portion is bent and the tape is arranged.

[0027] The above drawings include the following reference numerals:

[0028] 1. Battery cell; 2. Tab; 3. Adapter; 31. Middle plate section; 32. Connecting plate section; 4. Insulator; 5. Insulating gasket; 6. Pole. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0032] In order to improve the assembly efficiency of the battery and reduce the occurrence of tab breakage, the present application provides a battery assembly and a battery, which overcome the above-mentioned problems by bending the adapter sheet.

[0033] Embodiment 1

[0034] A battery assembly, see Figures 1 to 8 The battery assembly includes a battery cell 1, a pole ear 2 and a transfer plate 3. The battery cell 1 is provided with at least two, multiple battery cells 1 are arranged along a first direction, each battery cell 1 is provided with a pole ear 2, and the pole ear 2 extends along the height direction of the battery cell 1. The transfer plate 3 includes a middle plate segment 31 and two connecting plate segments 32 arranged on the middle plate segment 31 at intervals along the first direction. The middle plate segment 31 is located above the battery cell 1 along the height direction of the battery cell 1, and the connecting plate segment 32 extends from the middle plate segment 31 toward one side of the battery cell 1. The two connecting plate segments 32 are respectively fixedly connected to the pole ears 2 on two adjacent battery cells 1.

[0035] In this embodiment, during the connection between the pole tab 2 and the adapter 3, the pole tab 2 is pre-connected with the connecting plate section 32, and then the pole tab 2 and the connecting plate section 32 are connected by vertical welding. In this way, since the pole tab 2 does not need to be bent, the pole tab 2 and the connecting plate section 32 are connected by vertical welding, and the requirement for the height of the pole tab 2 is reduced. When the pole tab 2 is installed, the height of the pole tab 2 can be reduced, thereby reducing the resistance of the pole tab 2. And because the pole tab connection part is parallel to the height direction of the battery cell, it can avoid the angle between the pole tab connection part and the battery cell, and can avoid the problem of the pole tab 2 being pulled and broken, thereby increasing the life of the battery.

[0036] The two connecting plate sections 32 of the adapter plate realize electrical connection between the tabs 2 on two adjacent battery cells 1 .

[0037] The first direction is Figure 1 and Figure 2 The X direction in .

[0038] Furthermore, two connecting plate segments 32 are arranged at two ends of the middle plate segment 31 along the first direction.

[0039] Preferably, the connecting plate section 32 and the middle plate section 31 are integrally provided. During production, both ends of the adapter plate 3 are directly folded, and the folded parts form the connecting plate section 32, thereby facilitating production and processing of the adapter plate 3.

[0040] Furthermore, the connecting plate segment 32 and the middle plate segment 31 are arranged vertically so that when the connecting plate segment 32 is welded to the pole lug 2 , the middle plate segment 31 forms a structure parallel to the top surface of the battery cell 1 for achieving electrical connection with the pole.

[0041] It should be noted that the pole ear 2 installed on the battery cell 1 is perpendicular to the top surface of the battery cell 1. During the installation of the adapter 3, the middle plate section 31 is parallel to the top surface of the battery cell 1, and the connecting plate section 32 and the middle plate section 31 are vertically arranged. In this way, there is no need to adjust the position of the pole ear 2, which facilitates the welding of the pole ear 2 and the connecting plate section 32.

[0042] Further, the two side surfaces of the connecting plate segment 32 are formed into two connecting surfaces, at least one of which is connected to the pole lug 2. In the process of connecting the pole lug 2 to the connecting plate segment 32, the pole lug 2 is connected to the pole lug 2 through the connecting surface of the connecting plate segment 32. The surface-to-surface connection is conducive to improving the stability of the connection. At the same time, the connecting surface provides a larger connection area, which is convenient for welding operation.

[0043] See also Figure 2 An installation space is formed between the pole ears 2 on two adjacent battery cells 1 along the first direction, and the connecting plate segment 32 of the adapter 3 is arranged inside the installation space, and the connecting plate segment 32 is respectively connected to the surfaces of the pole ears 2 facing each other.

[0044] Specifically, by arranging the adapter plate 3 inside the installation space, the length of the adapter plate 3 can be reduced, and the material used for the adapter plate 3 can be reduced.

[0045] In this embodiment, the battery assembly also includes an insulating pad, which is arranged between the adapter plate 3 and the battery cell 1 along the height direction of the battery cell 1. The insulating sheet isolates the adapter plate 3 and the battery cell 1 to reduce the occurrence of short circuits and improve the installability of the battery.

[0046] Embodiment 2

[0047] Different from the first embodiment, an installation space is formed between two adjacent connecting plate segments 32 along the first direction, two adjacent pole tabs 2 are arranged inside the installation space, and the sides of the two pole tabs 2 away from each other along the first direction are connected to the connecting plate segment 32 .

[0048] Specifically, the tabs 2 on two adjacent battery cells 1 are arranged inside the installation space, and the adapter 3 can protect the tabs 2. At the same time, the connecting plate section 32 of the adapter 3 is arranged on the outside of the tab 2 to facilitate welding and fixing, which is beneficial to improving the assembly efficiency of the battery component.

[0049] Embodiment 3

[0050] Different from the first embodiment, see Figure 5 Each pole lug includes a plurality of metal sheets stacked along a first direction, and two side surfaces of the connecting plate segment 32 along the first direction are in contact with two adjacent metal sheets in the pole lug 2 .

[0051] Specifically, the pole lug 2 is formed by stacking multiple layers of sheet metal, and two adjacent metal sheets in the multiple layers of metal sheets are respectively connected to two side surfaces of the connecting plate segment 32. The connecting plate segment 32 is connected to the pole lug 2, so that the connection area between the connecting plate segment 32 and the pole lug 2 can be increased, thereby increasing the connection effect between the connecting plate segment 32 and the pole lug 2.

[0052] Among them, at least a part of the connecting plate segment 32 is inserted between two adjacent metal sheets, and the two adjacent metal sheets play the role of clamping the adapter sheet 3 to achieve fixed fit between the adapter sheet 3 and the tab 2, which is beneficial to improve the stability of the connection between the adapter sheet 3 and the tab.

[0053] See also Figure 6 In this embodiment, the battery assembly further includes an insulating member 4 covering the pole lug 2, wherein the insulating member 4 may cover the side of the pole lug 2 away from the other pole lug 2, and the insulating member 4 may also cover both side surfaces of the pole lug 2 along the first direction at the same time. In addition, the insulating member 4 may also be provided in the first and second embodiments, wherein the insulating member 4 covers the side of the pole lug 2 away from the connecting plate segment 32.

[0054] Among them, the insulating member can be a tape, which is bonded to the pole ear 2 to play an insulating role, such as avoiding conductivity between the pole ear 2 and the shell, or reducing the risk of short circuit caused by the pole ear 2 being inserted upside down into the battery cell.

[0055] Furthermore, a part of the insulating member 4 covers the pole lug 2, and another part of the insulating member 4 is connected to the adapter 3. The insulating member 4 can increase the connection effect between the pole lug 2 and the adapter 3. At the same time, the insulating member 4 can play an insulating role and increase the insulation of the adapter 3.

[0056] Embodiment 4

[0057] Different from the third embodiment, see Figure 7 In this embodiment, each pole ear includes a plurality of metal sheets stacked along a first direction, the plurality of metal sheets include a long metal sheet and a short metal sheet, the metal sheets are connected to the connecting plate segment 32, the long metal sheet has a bent section, the bent section is parallel to the middle plate segment 31 and connected to the side of the middle plate segment 31 facing away from the battery cell 1.

[0058] Specifically, a portion of the long metal sheet is connected to the middle plate segment 31 , which can increase the connection area between the pole tab 2 and the adapter plate 3 , thereby increasing the stability of the connection of the pole tab 2 .

[0059] Further, a plurality of short metal sheets are provided along the first direction, and two side surfaces of the connecting plate segment 32 along the first direction are in contact with two adjacent short metal sheets.

[0060] The long metal sheet and the short metal sheet are both part of the pole ear 2 , and the short metal sheet and the long metal sheet are connected and fixed to the connecting plate section 32 , and the long metal sheet is connected to the middle plate section 31 to further enhance the stability of the connection.

[0061] Preferably, a portion of the long metal sheet is parallel to the connecting plate segment 32 , and another portion of the long metal sheet is parallel to the middle plate segment 31 , so as to facilitate the connection between the tab 2 and the adapter 3 at a later stage.

[0062] See also Figure 7 The two adjacent short metal sheets in the multi-layer short metal sheets are respectively connected to the two sides of the connecting plate segment 32, and the connecting plate segment 32 is connected to the pole lug 2, so that the connection area between the connecting plate segment 32 and the pole lug 2 can be increased, thereby increasing the connection effect between the connecting plate segment 32 and the pole lug 2. And connecting with two adjacent short metal sheets facilitates the insertion of the connecting plate segment between the two short metal sheets, and the assembly is simple.

[0063] Among them, at least a part of the connecting plate section 32 is inserted between two adjacent short metal sheets, and the two adjacent short metal sheets play the role of clamping the adapter plate 3 to achieve fixed fit between the adapter plate 3 and the pole ear 2, which is beneficial to improve the stability of the connection between the adapter plate 3 and the pole ear.

[0064] In this embodiment, see Figure 8 The battery assembly may also include an insulating member 4, the specific configuration of which is similar to that in the third embodiment and will not be repeated here.

[0065] Embodiment 5

[0066] This embodiment provides a battery, comprising the battery assembly of any one of embodiments 1 to 4 and a pole 6 , wherein the adapter 3 of the battery cell 1 of the battery assembly is electrically connected to the pole 6 .

[0067] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0068] 1. The present application adopts the connecting plate section 32 of the adapter 3 to connect with the pole ear 2. The pole ear connecting part is parallel to the height direction of the battery cell, which can avoid the formation of an angle between the pole ear connecting part and the battery cell, thereby avoiding the occurrence of the pole ear 2 breaking.

[0069] 2. The adapter plate 3 and the tab 2 of the present application can be welded vertically, which is beneficial to improving the overall assembly efficiency.

[0070] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0073] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery assembly, characterized in that: include: A battery cell (1), wherein at least two of the battery cells (1) are provided, and a plurality of the battery cells (1) are stacked along a first direction; A pole lug (2), each of the battery cells (1) being provided with the pole lug (2), the pole lug (2) extending in a height direction of the battery cell (1); A transfer plate (3), the transfer plate (3) comprising a middle plate section (31) and two connecting plate sections (32) arranged on the middle plate section (31) at intervals along the first direction, the middle plate section (31) being located above the battery cell (1) along the height direction of the battery cell (1), the connecting plate section (32) extending from the middle plate section (31) toward one side of the battery cell (1), and the two connecting plate sections (32) being fixedly connected to the pole ears (2) on two adjacent battery cells (1), respectively.

2. The battery assembly according to claim 1, characterized in that: The two connecting plate segments (32) are arranged at two ends of the middle plate segment (31) along the first direction; and / or The connecting plate section (32) is arranged perpendicularly to the middle plate section (31).

3. The battery assembly according to claim 1, characterized in that: Along the first direction, two side surfaces of the connecting plate segment (32) are formed into two connecting surfaces, at least one of which is connected to the pole lug (2).

4. The battery assembly according to claim 1, characterized in that: An installation space is formed between the pole ears (2) on two adjacent battery cells (1) along the first direction, the connecting plate segment (32) is arranged inside the installation space, and the connecting plate segment (32) is respectively connected to the surfaces of the pole ears (2) facing each other; or An installation space is formed between two adjacent connecting plate segments (32) along the first direction, two adjacent pole lugs (2) are arranged inside the installation space, and the sides of the two pole lugs (2) that are away from each other along the first direction are connected to the connecting plate segment (32).

5. The battery assembly according to claim 1, characterized in that: Each of the pole lugs (2) comprises a plurality of metal sheets stacked along a first direction, and two side surfaces of the connecting plate segment (32) are in contact with two adjacent metal sheets in the pole lug (2) along the first direction.

6. The battery assembly according to claim 1, characterized in that: Each of the pole ears (2) comprises a plurality of metal sheets stacked along a first direction, the plurality of metal sheets comprising long metal sheets and short metal sheets, the metal sheets being connected to the connecting plate section (32), the long metal sheets having a bent section, the bent section being parallel to the middle plate section (31) and connected to a side of the middle plate section (31) facing away from the battery cell (1).

7. The battery assembly according to claim 6, characterized in that: A plurality of the short metal sheets are arranged along the first direction, and two side surfaces of the connecting plate segment (32) are in contact with two adjacent short metal sheets along the first direction.

8. The battery assembly according to any one of claims 1 to 7, characterized in that: The battery assembly further comprises an insulating member (4), wherein the insulating member (4) covers at least one side surface of the electrode tab (2) along the first direction.

9. The battery assembly according to claim 8, characterized in that: A portion of the insulating member (4) covers the pole lug (2), and another portion of the insulating member (4) is connected to the adapter plate (3).

10. A battery, characterized in that: The battery comprises: The battery assembly according to any one of claims 1 to 9; A pole (6), wherein the battery cell (1) of the battery assembly is electrically connected to the pole (6) via an adapter sheet (3).

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