Battery shell and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery shell and a battery, and aims to solve the problem of poor safety of an existing battery with two cavities. Therefore, the battery shell provided by the utility model comprises a first shell, a partition plate and a second shell, a first cavity is arranged between the first shell and the partition plate, a second cavity is arranged between the second shell and the partition plate, and the partition plate is provided with a pressure relief part positioned between the first cavity and the second cavity. According to the battery, the pressure relief part located between the first cavity and the second cavity is arranged on the partition plate, so that when the air pressure in the first cavity is too large, the pressure relief part is broken to discharge the gas in the first cavity into the second cavity, the pressure of the first cavity and the pressure of the second cavity are balanced, bulging is avoided, and the safety of the battery is improved.

Description

Technical Field

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

[0002] With the improvement of people's living standards and the development of science and technology, new energy is rapidly replacing traditional energy, including batteries.

[0003] Existing batteries usually have multiple closed cavities in a housing, and at least one battery cell is arranged in each cavity to improve the space utilization rate and energy density of the battery. However, the multiple closed cavities are usually independent. When the air pressure in one cavity is too high and there is no pipeline for discharge, it will cause the whole battery to bulge, and in severe cases, even cause the battery to explode, reducing the safety performance of the whole 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 problem of poor safety of existing two-cavity batteries.

[0006] In a first aspect, the utility model provides a battery housing, which includes a first housing, a partition board and a second housing. There is a first cavity between the first housing and the partition board, a second cavity between the second housing and the partition board, and a pressure relief part is arranged on the partition board between the first cavity and the second cavity.

[0007] In the case of adopting the above technical solution, by arranging a pressure relief part on the partition board between the first cavity and the second cavity, when the air pressure in the first cavity is too high, the pressure relief part can rupture to discharge the gas in the first cavity into the second cavity, so as to balance the pressure between the first cavity and the second cavity and prevent bulging, improving the safety of the battery.

[0008] In a preferred technical solution of the above battery housing, the pressure relief part is a notch or a groove.

[0009] In a preferred technical solution of the above battery housing, there are multiple pressure relief parts.

[0010] In a preferred technical solution of the above battery housing, the pressure relief part is circular or polygonal.

[0011] In a preferred technical solution of the above battery housing, the pressure relief part is arranged at the middle position in the length direction of the partition board or the pressure relief part is arranged at the middle position in the width direction of the partition board.

[0012] In the preferred technical solution of the above battery housing, the first housing is fixedly connected to the partition plate, and the second housing is fixedly connected to the partition plate.

[0013] In a second aspect, the present invention also provides a battery, the battery includes the above battery housing, a first battery cell and a second battery cell, the first battery cell is disposed in the first cavity, and the second battery cell is disposed in the second cavity.

[0014] In the preferred technical solution of the above battery, the partition plate is provided with a conductive member, a first end of the conductive member is disposed in the first cavity and is connected to the tab of the first battery cell, and a second end of the conductive member is disposed in the second cavity and is connected to the tab of the second battery cell.

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

[0016] In the preferred technical solution of the above battery, the second housing is provided with a second pole column, and the second pole column is connected to the tab of the second battery cell. Description of the Drawings

[0017] The preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings:

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

[0019] Figure 2 is an exploded view of the battery of the present invention;

[0020] Figure 3 is a perspective view of the partition plate of the present invention.

[0021] List of Reference Numerals:

[0022] 100, battery; 1, first housing; 2, second housing; 21, second cavity; 3, partition plate; 4, first battery cell; 5, second battery cell; 6, pressure relief part; 7, first pole column; 8, second pole column; 9, conductive member; 10, insulating member. Detailed Embodiments

[0023] The preferred embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0024] It should be noted that in the description of the present utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "rear", etc., which indicate directions or positional relationships, 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", "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.

[0026] Specifically, first refer to Figures 1 to 3 , Figure 1 which is a perspective view of the battery housing of the present utility model, Figure 2 which is an exploded view of the battery of the present utility model, Figure 3 which is a perspective view of the separator of the present utility model.

[0027] As Figures 1 to 3 shown, the battery housing provided by the present utility model includes a first housing 1, a second housing 2, and a separator 3 disposed between the first housing 1 and the second housing 2.

[0028] Preferably, the first housing 1, the separator 3, and the second housing 2 are arranged in sequence in the thickness direction X of the battery housing. The separator 3 divides the inner cavities of the first housing 1 and the second housing 2 into two cavities, so as to place a plurality of battery cells in the first housing 1 and the second housing 2, thereby improving the space utilization rate and energy density of the battery.

[0029] More preferably, the battery housing formed by the first housing 1, the separator 3, and the second housing 2 is a cuboid. In other embodiments, the battery housing can also be a cylinder or other geometric shapes, and the specific shape can be set according to needs and will not be specifically limited here.

[0030] Still more preferably, the materials of the first housing 1, the separator 3, and the second housing 2 can be made of materials such as aluminum, aluminum-plastic film, steel, etc. In this embodiment, the first housing 1, the separator 3, and the second housing 2 are all made of aluminum material, so as to facilitate the connection and fixation of the first housing 1, the separator 3, and the second housing 2.

[0031] In one embodiment, there is a first cavity between the first housing 1 and the separator 3, and a second cavity 21 between the second housing 2 and the separator 3.

[0032] Preferably, the first cavity is located between the first housing 1 and the partition plate 3. The first cavity is a closed cavity, so as to store the battery cell and the electrolyte therein. The second cavity 21 is located between the second housing 2 and the partition plate 3. The second cavity 21 is a closed cavity, so as to store the battery cell and the electrolyte therein.

[0033] More preferably, the first cavity and the second cavity 21 are independent of each other and not connected, so as to prevent the electrolytes in the first cavity and the second cavity 21 from flowing into each other and affecting the normal use of the battery.

[0034] In one embodiment, the partition plate 3 is provided with a pressure relief portion 6 located between the first cavity and the second cavity 21.

[0035] Preferably, the pressure relief portion 6 ruptures when the air pressure in the first cavity or the second cavity 21 is too high to realize the connection between the first cavity and the second cavity 21, so as to achieve the pressure balance between the first cavity and the second cavity 21, prevent the first housing 1 or the second housing 2 from bulging, and ensure the safety of the battery.

[0036] More preferably, when the pressure relief portion 6 is in an unruptured state, the partition plate 3 separates the first cavity and the second cavity 21, so that the first cavity and the second cavity 21 are not connected, and prevent the gas and electrolyte between the first cavity and the second cavity 21 from flowing into each other.

[0037] In one embodiment, the pressure relief portion 6 is a notch or a groove.

[0038] Preferably, as Figure 3 shown, the pressure relief portion 6 is a notch provided on the partition plate 3, so as to reduce the compressive strength of the pressure relief portion 6, so that the pressure relief portion 6 ruptures when the air pressure in the first cavity or the second cavity 21 is too high.

[0039] More preferably, the pressure relief portion 6 can also be a groove. The pressure relief portion 6 is recessed from the surface of the partition plate 3, so as to reduce the compressive strength of the pressure relief portion 6, so that the pressure relief portion 6 ruptures when the air pressure in the first cavity or the second cavity 21 is too high.

[0040] In other embodiments, the pressure relief portion 6 can also be other structures with a compressive strength lower than that of the partition plate 3, which can be selected and set as needed, and will not be specifically limited here.

[0041] In one embodiment, a plurality of pressure relief portions 6 are provided.

[0042] Preferably, the plurality of pressure relief portions 6 are arranged to at least partially rupture when the air pressure is too high to achieve air pressure balance, and prevent the battery safety from being affected due to the failure of only one pressure relief portion 6.

[0043] More preferably, the plurality of pressure relief parts 6 are arranged at intervals in sequence on the partition plate 3 and are dispersedly distributed, which not only ensures that the pressure relief parts 6 are broken when the air pressure is too high, but also prevents the pressure relief parts 6 from being too concentrated and affecting the overall structural strength of the partition plate 3, thus ensuring the stability of the battery structure.

[0044] In one embodiment, the pressure relief part 6 is circular or polygonal.

[0045] Preferably, the pressure relief part 6 can be circular, or can be in the shape of a polygon such as a quadrilateral or a pentagon. The selection of the above shapes is conducive to the smooth rupture of the pressure relief part 6 when the air pressure is too high, ensuring the safety of the battery.

[0046] In this embodiment, as Figure 2 and Figure 3 shown, the pressure relief part 6 is rectangular. The specific shape of the pressure relief part 6 can be set according to needs and will not be specifically limited here.

[0047] In one embodiment, the pressure relief part 6 is arranged at the middle position in the length direction Y of the partition plate 3 or the pressure relief part 6 is arranged at the middle position in the width direction Z of the partition plate 3, as Figure 3 shown.

[0048] Preferably, when the air pressure in the first cavity and the second cavity 21 is too high, since the middle position in the length direction Y of the partition plate 3 is most likely to deform, arranging the pressure relief part 6 at this position can cause it to rupture quickly, preventing the battery from bulging and ensuring the safety of the battery.

[0049] More preferably, the pressure relief part 6 can also be arranged at the middle position in the width direction Z of the partition plate 3. Since this position is most likely to deform, when the air pressure in the first cavity or the second cavity 21 is too high, the pressure relief part 6 can rupture quickly, ensuring the safety of the battery.

[0050] In one embodiment, the first housing 1 is fixedly connected to the partition plate 3, and the second housing 2 is fixedly connected to the partition plate 3.

[0051] Preferably, the first housing 1 and the partition plate 3 can be fixedly connected by welding, bonding or other means to achieve a firm and sealed connection between the first housing 1 and the partition plate 3. In other embodiments, the first housing 1 and the partition plate 3 can also be fixedly connected by other means, which will not be specifically limited here.

[0052] More preferably, the second housing 2 and the partition plate 3 can be fixedly connected by welding, bonding or other means to achieve a firm and sealed connection between the second housing 2 and the partition plate 3. In other embodiments, the second housing 2 and the partition plate 3 can also be fixedly connected by other means, which will not be specifically limited here.

[0053] In one embodiment, the present utility model further provides a battery 100, which includes the above-mentioned battery housing, a first battery cell 4 and a second battery cell 5. The first battery cell 4 is disposed in the first cavity, and the second battery cell 5 is disposed in the second cavity 21.

[0054] Preferably, as Figure 2 shown, the first battery cell 4 and the second battery cell 5 are respectively disposed in the first cavity and the second cavity 21, so that two battery cells are placed in the battery housing, which not only realizes the mutual independence of the first battery cell 4 and the second battery cell 5, but also improves the space utilization rate and energy density of the battery.

[0055] In one embodiment, the separator 3 is provided with a conductive member 9. The first end of the conductive member 9 is disposed in the first cavity and is connected to the tab of the first battery cell 4, and the second end of the conductive member 9 is disposed in the second cavity and is connected to the tab of the second battery cell 5.

[0056] Preferably, through holes (not shown) are provided on the separator 3, and the conductive member 9 passes through the through holes. The first end of the conductive member 9 is disposed in the first cavity and the second end is in the second cavity 21. The first end and the second end are preferably respectively disposed at both ends of the length direction of the conductive member 9, so as to facilitate the electrical connection of the conductive member 9 with the first battery cell 4 and the second battery cell 5 respectively. Further, the conductive member 9 is hermetically connected to the separator 3, so that the first cavity and the second cavity 21 are mutually independent, preventing the electrolytes in the two cavities from flowing through the through holes to each other.

[0057] More preferably, a tab of the first battery cell 4 is connected to the first end of the conductive member 9, such as by welding, etc., so as to realize the electrical connection between the first battery cell 4 and the conductive member 9; a tab of the second battery cell 5 is connected to the second end of the conductive member 9, such as by welding, etc., so as to realize the electrical connection between the second battery cell 5 and the conductive member 9.

[0058] The setting of the conductive member 9 realizes the electrical connection between the first battery cell 4 and the second battery cell 5, preferably in series, etc. The user can select the setting according to needs and no specific limitation is made here.

[0059] Even more preferably, the battery 100 further includes an insulating member 10, and at least a part of the insulating member 10 is between the conductive member 9 and the separator 3, so as to realize the insulation between the conductive member 9 and the separator 3.

[0060] In one embodiment, the first housing 1 is provided with a first pole column 7, and the first pole column 7 is connected to the tab of the first battery cell 4.

[0061] Preferably, the first pole column 7 is disposed on the first housing 1. One end of the first pole column 7 is outside the first housing 1, and the other end of the first pole column 7 is inside the first housing 1. The first pole column 7 is insulated and sealedly connected to the first housing 1, so as to ensure the insulation of the first housing 1 and the sealing of the first cavity. The insulation and sealed connection between the first pole column 7 and the first housing 1 belong to the prior art and are not specifically limited herein.

[0062] More preferably, the other pole ear of the first battery cell 4 is connected to the end portion of the first pole column 7 inside the first cavity, and it can be fixedly connected by means such as welding, so as to output electric energy through the first pole column 7.

[0063] In one embodiment, the second housing 2 is provided with a second pole column 8, and the second pole column 8 is connected to the pole ear of the second battery cell 5.

[0064] Preferably, the second pole column 8 is disposed on the second housing 2. One end of the second pole column 8 is outside the second housing 2, and the other end is inside the second housing 2. The second pole column 8 is insulated and sealedly connected to the second housing 2, so as to ensure the insulation of the second housing 2 and the sealing of the second cavity 21. The insulation and sealed connection between the second pole column 8 and the second housing 2 belong to the prior art and are not specifically limited herein.

[0065] More preferably, the other pole ear of the second battery cell 5 is connected to the end portion of the second pole column 8 inside the second cavity, and it can be fixedly connected by means such as welding, so as to output electric energy through the second pole column 8.

[0066] Still more preferably, one of the first pole column 7 and the second pole column 8 is a positive pole column and the other is a negative pole column.

[0067] Those skilled in the art can understand that although some of the embodiments described herein include some features of other embodiments, 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.

[0068] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, 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 invention.

Claims

1. A battery housing, characterized in that: The battery shell includes a first shell, a partition and a second shell, a first cavity is provided between the first shell and the partition, a second cavity is provided between the second shell and the partition, and the partition is provided with a pressure relief portion between the first cavity and the second cavity.

2. The battery housing according to claim 1, characterized in that: The pressure relief portion is a notch or a groove.

3. The battery housing according to claim 1, characterized in that: There are multiple pressure relief parts.

4. The battery housing according to claim 1, characterized in that: The pressure relief portion is circular or polygonal.

5. The battery housing according to claim 1, characterized in that: The pressure relief portion is disposed at a middle position in a length direction of the partition or the pressure relief portion is disposed at a middle position in a width direction of the partition.

6. The battery case according to claim 1, characterized in that: The first shell is fixedly connected to the partition, and the second shell is fixedly connected to the partition.

7. A battery, characterized in that: The battery comprises a battery casing according to any one of claims 1 to 6, a first battery cell and a second battery cell, wherein the first battery cell is disposed in the first cavity, and the second battery cell is disposed in the second cavity.

8. The battery according to claim 7, characterized in that The partition is provided with a conductive member, a first end of the conductive member is arranged in the first cavity and connected to the pole lug of the first battery cell, and a second end of the conductive member is arranged in the second cavity and connected to the pole lug of the second battery cell.

9. The battery according to claim 8, characterized in that The first shell is provided with a first pole, and the first pole is connected to the pole ear of the first battery cell.

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

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