Battery and battery pack

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery and a battery pack, and aims to solve the problem of uneven stress caused by offset of tabs of the conventional battery. Therefore, the battery disclosed by the utility model comprises a partition plate, two shells and a conductive column, the two shells are positioned on two sides of the partition plate in a first direction, a cavity is arranged between the shells and the partition plate, a battery cell and a conductive piece are arranged in the cavity, and the conductive piece comprises a first end part, a second end part and a connecting part arranged between the first end part and the second end part; the first end parts and the second end parts are arranged at intervals in the first direction, the first end parts are fixedly connected with the conductive columns, and the second end parts are connected with tabs of the battery cells. The conductive piece is arranged between the conductive column and the tab of the battery cell, so that a certain distance is kept between the tab and the conductive column, and uneven stress and breakage caused by offset of the tab in the first direction of the battery cell are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and particularly provides a battery and a battery pack. Background Art

[0002] With the improvement of people's living standards and the enhancement of environmental protection awareness, new energy is rapidly replacing traditional energy represented by petroleum, including batteries.

[0003] In order to improve the space utilization rate and energy density of the battery, multiple independent cavities are usually arranged in the thickness direction of a housing, and at least one battery cell is arranged in each cavity. In order to realize the electrical connection of the battery cells in adjacent cavities, the existing battery further includes a conductive column, and both ends of the conductive column extend into two adjacent cavities respectively to be connected with the ear of the battery cell in the corresponding cavity. However, the existing conductive column is usually short in length, so that the ear of the battery cell is offset to one side in the thickness direction, resulting in uneven stress and ear breakage, etc., affecting the use and safety of the battery.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] The utility model aims to solve the above technical problems, that is, to solve the problems of uneven stress and breakage of the ear of the existing battery caused by offset.

[0006] In a first aspect, the utility model provides a battery, including a partition board, a housing, and a conductive column arranged on the partition board. There are two housings and they are located on both sides of the partition board in a first direction. A cavity is arranged between the housing and the partition board, and a battery cell and a conductive member are arranged in the cavity. The conductive member includes a first end, a second end, and a connecting portion arranged between the first end and the second end. The first end and the second end are arranged at intervals in the first direction. The first end is fixedly connected with the conductive column, and the second end is fixedly connected with the ear of the battery cell.

[0007] In the case of adopting the above technical solution, by arranging a conductive member between the conductive column and the ear of the battery cell, and the conductive member includes a first end connected with the conductive column and a second end connected with the ear arranged at intervals in the first direction, so that the ear and the conductive column maintain a certain distance in the first direction, preventing uneven stress and breakage caused by offset of the ear due to approaching the conductive column in the first direction of the battery cell, and ensuring the structural stability and service life of the battery.

[0008] In a preferred technical solution of the above battery, the distance between the first end and the second end is d, where 5mm ≤ d ≤ 15mm.

[0009] In the preferred technical solution of the above battery, the first end portion, the second end portion and the connecting portion are integrally formed.

[0010] In the preferred technical solution of the above battery, the thickness of the first end portion is t 1 , where 0.8 mm ≤ t 1 ≤ 2 mm; and / or, the thickness of the second end portion is t 2 , where 0.8 mm ≤ t 2 ≤ 2 mm.

[0011] In the preferred technical solution of the above battery, a plurality of conductive posts are provided.

[0012] In the preferred technical solution of the above battery, the separator is provided with a first through hole, the conductive post passes through the first through hole, and a sealing ring is provided between the conductive post and the separator.

[0013] In the preferred technical solution of the above battery, an insulating member is provided between the first end portion and the separator.

[0014] In the preferred technical solution of the above battery, the first end portion is parallel to the second end portion.

[0015] In the preferred technical solution of the above battery, the housing is provided with a pole column, and the pole column is connected to the tab of the battery cell.

[0016] In a second aspect, the present invention further provides a battery pack, and the battery pack includes the above battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following describes the preferred embodiments of the present invention with reference to the drawings. In the drawings:

[0018] Figure 1 is a perspective view of the battery of the present invention;

[0019] Figure 2 is an exploded view of the battery of the present invention without the battery cell;

[0020] Figure 3 is a perspective view of the separator and the conductive member of the present invention;

[0021] Figure 4 is Figure 3 a partial enlarged view of part A of the present invention shown in

[0022] Figure 5 is Figure 4 a partial exploded view of part A of the present invention shown in

[0023] LIST OF REFERENCE NUMERALS:

[0024] 100. Battery; 1. Housing; 11. Cavity; 2. Partition; 21. First through-hole; 3. Conductive member; 31. First end; 32. Second end; 33. Connecting portion; 4. Insulating member; 41. Second through-hole; 5. Sealing ring; 6. Conductive post; 7. Terminal; X. First direction. Detailed implementation manners

[0025] The preferred implementation manners of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0026] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "arranged", "connected", and "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Specifically, first refer to Figures 1 to 5 , Figure 1 is a perspective view of the battery of the present utility model, Figure 2 is an exploded view of the battery of the present utility model without the battery cell, Figure 3 is a perspective view of the partition and the conductive member of the present utility model, Figure 4 is Figure 3 a partial enlarged view of part A of the present utility model shown in Figure 5 is Figure 4 a partial exploded view of part A of the present utility model shown in

[0029] In an embodiment, as Figures 1 to 5 shown, the battery 100 of the present utility model includes a partition 2, a housing 1, and a conductive post 6 arranged on the partition 2. There are two housings 1 and they are located on both sides of the partition 2 in the first direction X.

[0030] Preferably, the partition 2 can be a cuboid, a cylinder, or other geometric shapes, etc. The user can select and set according to needs, and no specific limitation is made here. Further, in this embodiment, the partition 2 is a cuboid.

[0031] More preferably, the partition 2 can be made of materials such as aluminum plates and aluminum plastic films. The user can select and set according to needs, and no specific limitation is made here. In this embodiment, the partition 2 is an aluminum plate.

[0032] Even more preferably, there are two housings 1, and they are located on both sides of the partition 2 in the first direction X. The two housings 1 are respectively connected to the partition 2, so that a cavity 11 is formed between each housing 1 and the partition 2. Further, the housing 1 can be an aluminum shell, an aluminum plastic film, etc. The user can select and set according to needs, and no specific limitation is made here. In this embodiment, the housing 1 is an aluminum shell.

[0033] Further, the conductive column 6 is fixed on the partition 2. For example, the conductive column 6 penetrates the partition 2 along the first direction X, etc. The two ends of the conductive column 6 are respectively in the cavities 11 between the two housings 1 and the partition 2, so as to be electrically connected to the battery cells in the corresponding cavities 11 and realize the electrical connection of the battery cells in the two cavities 11.

[0034] Even further, the conductive column 6 can be a single metal part, such as a metal part made of nickel, etc., or a composite metal structure, such as a copper-aluminum composite part, etc., so as to facilitate the stable connection of the battery cells in the two cavities 11.

[0035] It should be noted that the first direction X is the thickness direction of the battery 100, as Figure 2 shown.

[0036] In one embodiment, the cavity 11 is provided with a battery cell and a conductive member 3.

[0037] Preferably, the battery cell is received in the cavity 11, that is, the battery cell is between the partition 2 and the housing 1. The first direction X is also the thickness direction of the battery cell.

[0038] More preferably, the battery cell includes a positive electrode plate, a negative electrode plate, and a separator located between the positive electrode plate and the negative electrode plate. The separator is used to insulate the positive electrode plate and the negative electrode plate from each other and prevent the positive electrode plate and the negative electrode plate from contacting and causing a short circuit. Further, the battery cell can be a stacked battery cell or a wound battery cell, etc. The user can select and set according to needs, and no specific limitation is made here.

[0039] Even more preferably, the conductive member 3 is arranged between the tab of the battery cell and the conductive column 6 in the first direction X to realize the electrical connection between the battery cell and the conductive column 6.

[0040] Further preferably, the first direction X is the stacking direction of the tabs of the battery cell, and the conductive member 3 is disposed between the conductive post 6 and the tab in the first direction X, thereby preventing uneven stress caused by the tab being biased in the first direction X due to its proximity to the conductive post 6.

[0041] In one embodiment, the conductive member 3 includes a first end 31, a second end 32, and a connecting portion 33 disposed between the first end 31 and the second end 32. The first end 31 and the second end 32 are arranged at intervals in the first direction X. The first end 31 is fixedly connected to the conductive post 6, and the second end 32 is connected to the tab of the battery cell.

[0042] Preferably, the first end 31 and the second end 32 are arranged at intervals in the first direction X, so that a certain distance is maintained between the first end 31 and the second end 32 in the first direction X.

[0043] More preferably, the connecting portion 33 is located between the first end 31 and the second end 32. Preferably, the connecting portion 33 extends in the first direction X. One end of the connecting portion 33 is fixedly connected to the first end 31, and the other end of the connecting portion 33 is fixedly connected to the second end 32, thereby realizing the fixed connection between the first end 31 and the second end 33.

[0044] Still more preferably, the first end 31 and the conductive post 6 can be integrally formed, or can be fixedly connected by welding, riveting, etc. It only needs to realize the fixed connection between the first end 31 and the conductive post 6, and no specific limitation is made here.

[0045] Further preferably, the second end 32 and the tab of the battery cell can be fixedly connected by welding or other means. It only needs to realize the fixed connection between the second end 32 and the tab of the battery cell, and no specific limitation is made here. Specifically, the surface of the second end 32 facing away from the first end 31 is fixedly connected to the tab of the battery cell, so as to maximize the distance between the tab and the conductive post 6, and further prevent the tab of the battery cell from being biased in the first direction X.

[0046] It should be noted that it is the above settings of the first end 31 and the second end 32 that keep a certain distance between the tab of the battery cell and the conductive post 6 in the first direction X, thereby preventing phenomena such as breakage caused by uneven stress on the tab due to the tab of the battery cell being biased in the first direction X, and ensuring the stability of the structure.

[0047] In one embodiment, the first end 31, the second end 32, and the connecting portion 33 are integrally formed.

[0048] Preferably, by integrally forming the first end 31, the second end 32, and the connecting portion 33, the process difficulty is reduced and the structural strength is improved.

[0049] In other embodiments, the first end portion 31, the second end portion 32, and the connecting portion 33 may adopt other fixed connection methods such as welding, and the user can select and set according to needs, which will not be specifically limited herein.

[0050] In one embodiment, the distance between the first end portion 31 and the second end portion 32 is d, where 5 mm ≤ d ≤ 15 mm, as Figure 4 shown.

[0051] Preferably, d is the distance between the first end portion 31 and the second end portion 32 in the first direction X, specifically: the distance between the surface of the first end portion 31 facing away from the second end portion 32 and the surface of the second end portion 32 facing away from the first end portion 31, as Figure 4 shown.

[0052] More preferably, the distance d between the first end portion 31 and the second end portion 32 can be any value between 5 mm and 15 mm, such as 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc. The user can select and set according to needs, which will not be specifically limited herein.

[0053] Even more preferably, by limiting d within the above range, the distance between the tab of the battery cell and the conductive post 6 in the first direction X is limited, so that the tab of the battery cell does not need to be offset in the first direction X towards the conductive post 6 to approach the conductive post 6, thereby preventing situations such as breakage caused by uneven force on the tab of the battery cell and ensuring the structural stability.

[0054] In one embodiment, there are two conductive members 3, which are respectively located on both sides of the separator 2.

[0055] Preferably, the two conductive members 3 are respectively arranged in the cavities 11 between the two housings 1 and the separator 2, so as to be respectively between the tabs of the battery cells arranged in the two cavities 11 and the conductive posts 6, so as to prevent situations such as breakage caused by uneven force caused by the offset of the tabs of the battery cells in the two cavities 11 in the first direction X and ensure the structural stability.

[0056] In other embodiments, there may also be only one conductive member 3, which is arranged in the cavity 11 on one side of the separator 2, and the tab of the battery cell in the cavity 11 on the other side of the separator 2 is directly connected to the conductive post 6. The user can select and set according to needs, which will not be specifically limited herein.

[0057] In one embodiment, the thickness of the first end portion 31 is t 1, where 0.8 mm ≤ t 1 ≤ 2 mm, as Figure 5 shown.

[0058] Preferably, the thickness t of the first end portion 31 1 is any value between 0.8 mm and 2 mm, such as 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc. The user can select and set according to needs, and no specific limitation is made here.

[0059] It should be noted that by the above limitation on the thickness t of the first end portion 31 1 on the one hand, it can prevent the thickness t 1 from being too small to affect the structural strength of the first end portion 31 and the stability of the connection with the conductive post 6, and on the other hand, it can prevent the thickness t 1 from being too large to occupy too much volume and cause an increase in cost. It is precisely the limitation of the above range that not only ensures the structural strength and structural stability of the first end portion 31, but also improves the space utilization rate and reduces the cost.

[0060] In one embodiment, the thickness of the second end portion is t 2 , where 0.8 mm ≤ t 2 ≤ 2 mm, as Figure 5 shown.

[0061] Preferably, the thickness t of the second end portion 32 2 is any value between 0.8 mm and 2 mm, such as 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc. The user can select and set according to needs, and no specific limitation is made here.

[0062] It should be noted that by the above limitation on the thickness t of the second end portion 32 2 on the one hand, it prevents the thickness t 2 from being too small to affect the structural strength of the second end portion 32 and the stability of the connection with the tab, and on the other hand, it prevents the thickness t 2 from being too large to occupy too much volume and cause an increase in cost. It is precisely the limitation of the above range that not only ensures the structural strength and structural stability of the second end portion 32, but also improves the space utilization rate and reduces the cost.

[0063] In one embodiment, the conductive post 6 is provided with a plurality of them.

[0064] Preferably, a plurality of conductive posts 6 are fixed on the partition plate 2, and both ends of the conductive posts 6 are fixedly connected to the conductive members 3 in the cavities 11 on both sides of the partition plate 2 respectively, so as to improve the over-current capacity between the battery cells on both sides of the partition plate 2 and improve the structural stability.

[0065] In one embodiment, the partition plate 2 is provided with a first through hole 21, the conductive post 6 passes through the first through hole 21, and a sealing ring 5 is arranged between the conductive post 6 and the partition plate 2.

[0066] Preferably, the first through hole 21 penetrates the partition plate 2 along the first direction X, and the conductive post 6 passes through the first through hole 21, so that both ends of the conductive post 6 are respectively located in the cavities 11 on both sides of the partition plate 2.

[0067] More preferably, the number of the first through holes 21 is the same as that of the conductive posts 6 and they are in one-to-one correspondence, so that each first through hole 21 passes through a conductive post 6 respectively.

[0068] Still more preferably, the sealing ring 5 is arranged between the conductive post 6 and the partition plate 2, so as to realize the seal between the conductive post 6 and the partition plate 2, and further realize the isolation and seal of the cavities 11 on both sides of the partition plate 2, and prevent the mutual flow of the electrolyte caused by the connection of the two cavities 11.

[0069] Further preferably, the shape of the conductive post 6 is adapted to the shape of the sealing ring 5. In this embodiment, the conductive post 6 is a cylinder, and the sealing ring 5 is a circular ring, so that the conductive post 6 passes through the inside of the sealing ring 5 to realize the seal between the conductive post 6 and the partition plate 2. In other embodiments, the shapes of the conductive post 6 and the sealing ring 5 can be selected and set as required, and no specific limitation is made here.

[0070] In one embodiment, an insulating member 4 is arranged between the first end portion 31 and the partition plate 2.

[0071] Preferably, the insulating member 4 is located between the first end portion 31 and the partition plate 2, so as to realize the insulation between the first end portion 31 and the partition plate 2 and prevent the conduction between the first end portion 31 and the partition plate 2 from causing short circuits and other situations.

[0072] More preferably, the insulating member 4 is preferably in a flat plate shape, and the area of the insulating member 4 is larger than the area of the first end portion 31, so that the insulating member 4 can completely cover the first end portion 31 and prevent the first end portion 31 from bending and contacting the partition plate 2 due to the gap between the first end portion 31 and the partition plate 2, and ensure the structural stability.

[0073] Still more preferably, the insulating member 4 is provided with a second through hole 41, and the second through hole 41 penetrates the insulating member 4 along the first direction X, so that the conductive post 6 passes through the second through hole 41 to be fixedly connected to the first end portion 31.

[0074] It should be noted that the insulating member 4 is located between the first end portion 31 and the partition plate 2. When the second end portion 32 is welded and fixed to the tab, since the second end portion 32 is far from the insulating member 4, the insulating member 4 will not melt due to welding, ensuring the insulating performance of the insulating member 4.

[0075] Further preferably, the number of the second through holes 41 is the same as and corresponds one by one to the number of the conductive posts 6, so that each conductive post 6 can pass through a second through hole 41.

[0076] In one embodiment, the first end portion 31 is parallel to the second end portion 32.

[0077] Preferably, the first end portion 31 and the second end portion 32 are arranged in parallel. Since the first end portion 31 abuts against the partition plate 2, the tab abutting against the second end portion 32 is parallel to the partition plate 2, ensuring the structural stability of the tab and its stable connection with the second end portion 32, and at the same time preventing the second end portion 32 from bending and interfering with other structures.

[0078] In one embodiment, the housing 1 is provided with a pole column 7, and the pole column 7 is connected to the tab of the battery cell.

[0079] Preferably, the pole column 7 can be arranged on any wall surface of the housing 1 so as to be arranged at the position required by the housing 1.

[0080] More preferably, the pole column 7 is insulated from the housing 1. For example, the housing 1 is provided with a through hole, the pole column 7 passes through the through hole and an insulating plastic is provided between the pole column 7 and the housing 1 to realize the insulation between the pole column 7 and the housing 1 and prevent the pole column 7 from conducting electricity with the housing 1.

[0081] Still more preferably, one tab of the battery cell is connected to the second end portion 32, and the other tab of the battery cell is connected to the pole column 7, so as to output electric energy through the pole column 7. Preferably, the electrodes of the above two tabs are opposite, for example, one is a positive tab and the other is a negative tab.

[0082] Further preferably, each of the two housings 1 is provided with a pole column 7, and one pole column 7 on the two housings 1 is a positive pole column and the other is a negative pole column, so as to output electric energy normally.

[0083] In one embodiment, the present invention further provides a battery pack, and the battery pack includes the above-mentioned battery 100.

[0084] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0085] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A battery, characterized in that: It includes a partition, a shell, and a conductive column arranged on the partition, the shell is provided with two and is located on both sides of the partition in a first direction, a cavity is provided between the shell and the partition, a battery cell and a conductive member are provided in the cavity, the conductive member includes a first end, a second end, and a connecting portion arranged between the first end and the second end, the first end and the second end are arranged at intervals in the first direction, the first end is fixedly connected to the conductive column, and the second end is fixedly connected to the pole ear of the battery cell.

2. The battery according to claim 1, characterized in that The distance between the first end and the second end is d, wherein 5 mm≤d≤15 mm.

3. The battery according to claim 1, characterized in that The first end portion, the second end portion and the connecting portion are integrally formed.

4. The battery according to claim 1, characterized in that The thickness of the first end portion is t1, wherein 0.8 mm≤t1≤2 mm; and / or the thickness of the second end portion is t2, wherein 0.8 mm≤t2≤2 mm.

5. The battery according to claim 1, characterized in that There are a plurality of conductive pillars.

6. The battery according to claim 1, characterized in that The partition is provided with a first through hole, the conductive column passes through the first through hole, and a sealing ring is provided between the conductive column and the partition.

7. The battery according to claim 1, characterized in that An insulating member is provided between the first end portion and the partition.

8. The battery according to claim 1, characterized in that The first end is parallel to the second end.

9. The battery according to claim 1, characterized in that The shell is provided with a pole, and the pole is connected to the pole ear of the battery cell.

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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