Battery shell and battery pack

Abstract

The utility model relates to a battery shell and a battery pack, the battery shell is located in a box body, the battery shell comprises an upper shell and a lower shell, the lower shell is used for fixing a battery, and the upper shell is fixed on the lower shell and is provided with a via hole allowing a pole of the battery to pass through; the lower shell comprises a pair of first side walls and a pair of second side walls along the extending direction perpendicular to the pole, each first side wall is connected between the two second side walls, two opposite end surfaces of the pair of first side walls respectively comprise a first connecting part, and two opposite end surfaces of the pair of second side walls respectively comprise a second connecting part; and the two first connecting parts and the two second connecting parts are arranged in a staggered manner along the extension direction of the pole. The height difference exists between the first connecting parts and the second connecting parts of the battery shell, and the two first connecting parts and the two second connecting parts are matched with each other to limit the posture of the battery shell relative to the box body, so that the situation that the box body is electrified due to the change of the posture of the battery in the moving process of the box body is avoided, and potential safety hazards are eliminated.

Description

Technical Field

[0001] This application relates to the field of battery housings, and particularly to a battery housing and a battery pack. Background Art

[0002] During transportation or movement, the battery housed in the box is prone to vibration, which can easily change the posture of the battery and even cause the battery to overturn. After the posture is changed, the battery or its pole column may contact the box, causing the box to be electrified, posing a safety hazard. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of this application is to provide a battery housing that can limit the posture of the battery and a battery pack including the above battery housing. The specific technical solutions are as follows:

[0004] In a first aspect, an embodiment of this application provides a battery housing. The battery housing is located in a box. The battery housing includes an upper housing and a lower housing. The lower housing is used to fix the battery. The upper housing is fixed to the lower housing and has a through hole allowing the pole column of the battery to pass through. Along the direction perpendicular to the extension direction of the pole column, the lower housing includes a pair of first side walls and a pair of second side walls. Each first side wall is connected between the two second side walls. The two end faces of the pair of first side walls facing away from each other respectively include a first connecting portion, and the two end faces of the pair of second side walls facing away from each other respectively include a second connecting portion. The two first connecting portions and the two second connecting portions are arranged alternately along the extension direction of the pole column.

[0005] The pair of first side walls and the pair of second side walls of the battery housing of this application are respectively provided with two first connecting portions and two second connecting portions. The two first connecting portions and the two second connecting portions are respectively used to connect with the box, so that the battery, the battery housing and the box are fixedly connected. The battery housing is connected to the box in multiple directions, making the connection between the battery housing and the box more reliable.

[0006] The first connecting portion and the second connecting portion of the battery housing of this application are arranged alternately along the extension direction of the pole column. There is a height difference between the first connecting portion and the second connecting portion. The two first connecting portions and the two second connecting portions cooperate with each other to limit the posture of the battery housing relative to the box, thereby maintaining the orientation of the pole column of the battery relative to the box, avoiding the box being electrified due to the change of the battery posture during the transportation or movement of the box, and eliminating the safety hazard. At the same time, the orientation of the pole column of the battery remains unchanged relative to the box, facilitating the cooperation between the lead-out member of the box or the external electrical equipment and the pole column of the battery to realize the power supply of the battery.

[0007] In one embodiment, a bracket is fixed inside the box body. The bracket includes two first fixing parts and two second fixing parts. Each first fixing part is used for fixedly connecting a first connecting part, and each second fixing part is used for fixedly connecting a second connecting part. Along the extending direction of the pole column, the first fixing part is located below the first connecting part; and / or along the extending direction of the pole column, the second fixing part is located below the second connecting part.

[0008] In this embodiment, a bracket is provided inside the box body. The first fixing part and the second fixing part of the bracket respectively correspond to the first connecting part and the second connecting part of the battery housing one by one. The bracket is used for fixedly connecting the box body and the battery housing; at the same time, the first fixing part of the bracket is located below the first connecting part to support the first connecting part, and further support the battery housing; and / or the second fixing part of the bracket is located below the second connecting part to support the second connecting part, and further support the battery housing.

[0009] In one embodiment, along the extending direction of the pole column, the first fixing part is located below the first connecting part, and the second fixing part is located above the second connecting part. The first fixing part and the second fixing part have the same height.

[0010] In this embodiment, the first fixing part and the second fixing part of the bracket are at the same height. The first fixing part and the second fixing part are located between the first connecting part and the second connecting part. The first fixing part faces upward and is connected to the first connecting part, and the second fixing part faces downward and is connected to the second connecting part, thereby fixing the bracket and the battery housing.

[0011] In one embodiment, at least one of the two first fixing parts and the two second fixing parts is detachably connected to the main body of the bracket.

[0012] In this embodiment, the first fixing part or the second fixing part is detachable. Before the battery housing is installed in the box body, removing the first fixing part or the second fixing part can reduce the interference between the battery housing and the box body during the assembly process, facilitating the assembly of the battery housing and the box body; at the same time, when there are multiple battery housings in the box body, it can also reduce the interference between the multiple battery housings.

[0013] In one embodiment, the distance between the first connecting part and the second connecting part along the extending direction of the pole column is greater than or equal to half of the size of the battery; and / or the distance between the first connecting part and the second connecting part along the extending direction of the pole column is less than the size of the battery.

[0014] In this embodiment, the distance between the first connecting portion and the second connecting portion is greater than or equal to half of the size of the battery, ensuring the height difference between the first connecting portion and the second connecting portion, so that the shear forces borne by the first connecting portion and the second connecting portion are of a certain magnitude; and / or the distance between the first connecting portion and the second connecting portion is less than the size of the battery, so as to reduce the size of the battery housing in the extending direction of the pole column and improve the space utilization rate inside the box.

[0015] In one embodiment, along the direction perpendicular to the extension direction of the pole column, the projections of the first connecting portion and the second connecting portion on the battery at least partially coincide with the battery.

[0016] In this embodiment, the projections of the first connecting portion and the second connecting portion on the battery are at least partially located inside the battery, so as to reduce the size of the battery housing in the direction perpendicular to the extension direction of the pole column and improve the space utilization rate inside the box.

[0017] In one embodiment, the battery housing is rectangular, the length of the first side wall is greater than the length of the second side wall, and the dimension by which the first connecting portion protrudes from the first side wall is greater than the dimension by which the second connecting portion protrudes from the second side wall.

[0018] In this embodiment, the length of the first side wall of the battery housing is greater than that of the second side wall, and the dimension of the first connecting portion is greater than that of the second connecting portion, so as to ensure the reliable connection between the first connecting portion and the first fixing portion.

[0019] In one embodiment, the two first connecting portions are formed by folding a pair of first side walls in opposite directions respectively, and the two second connecting portions are formed by folding a pair of second side walls in opposite directions respectively.

[0020] In this embodiment, the first connecting portion and the second connecting portion are respectively formed by folding the first side wall and the second side wall in opposite directions, which is convenient for the processing of the battery housing.

[0021] In one embodiment, a liquid injection hole is provided on the side of the battery facing the upper housing, and the through hole of the upper housing is also used to allow at least part of the liquid injection hole of the battery to be exposed.

[0022] In this embodiment, the through hole of the upper housing is also used to expose the liquid injection hole. Since the two first connecting portions and the two second connecting portions cooperate with each other to limit the posture of the battery housing relative to the box body, the orientation of the liquid injection hole of the battery relative to the box body can also be maintained. The liquid injection hole with a fixed orientation is convenient for subsequent replenishment of the electrolyte in the battery.

[0023] In a second aspect, the present application also provides a battery pack. The battery pack includes a box body, at least one battery and at least one of the above-mentioned battery housings. The first connecting portion and the second connecting portion of the battery housing are respectively used for fixedly connecting with the box body, and the lower housing of each battery housing is used to fix at least one battery.

[0024] It can be understood that since the battery pack of the present application adopts the above-mentioned battery housing, the orientation of the battery relative to the box body remains unchanged, enabling the battery pack to be applied to scenarios with more dynamic loads. Moreover, the battery and the box body are connected through multiple pairs of connecting parts, having higher reliability and service life. Description of the Drawings

[0025] Figure 1 Schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0026] Figure 2 Schematic internal structural diagram of a battery pack provided in an embodiment of the present application;

[0027] Figure 3 Schematic structural diagram of the battery and the battery housing of a battery pack provided in an embodiment of the present application;

[0028] Figure 4 Schematic partial structural diagram of the battery and the battery housing of a battery pack provided in an embodiment of the present application;

[0029] Figure 5 Schematic structural diagram of a box body provided in an embodiment of the present application from one perspective;

[0030] Figure 6 Schematic structural diagram of a box body provided in an embodiment of the present application from another perspective;

[0031] Figure 7 Schematic structural diagram of a battery housing provided in an embodiment of the present application;

[0032] Figure 8 Schematic structural diagram of a lower housing provided in an embodiment of the present application from one perspective;

[0033] Figure 9 Schematic structural diagram of a lower housing provided in an embodiment of the present application from another perspective;

[0034] Figure 10 Schematic structural diagram of a lower housing provided in an embodiment of the present application from another perspective;

[0035] Figure 11 Schematic internal structural diagram of a battery pack provided in another embodiment of the present application. Detailed Description of the Invention

[0036] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0037] The descriptions of the following embodiments refer to the attached drawings for illustrating specific embodiments in which the present application can be implemented. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in the present application, unless otherwise specified, both include direct and indirect connection (coupling). The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present application, 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 thus cannot be construed as a limitation to the present application.

[0038] Please refer to Figures 1-4 , in which, Figure 1 shows a schematic structural diagram of the battery pack 200 provided in an embodiment of the present application; Figure 2 shows a schematic internal structural diagram of the battery pack 200 provided in an embodiment of the present application; Figure 3 shows a schematic structural diagram of the battery 140 and the battery housing 100 of the battery pack 200 provided in an embodiment of the present application; Figure 4 shows a partial schematic structural diagram of the battery 140 and the battery housing 100 of the battery pack 200 provided in an embodiment of the present application.

[0039] The battery housing 100 of the present application is located inside the box body 110. The battery housing 100 includes an upper housing 20 and a lower housing 10. The lower housing 10 is used to fix the battery 140. The upper housing 20 is fixed to the lower housing 10 and has a through hole allowing the pole 141 of the battery 140 to pass through.

[0040] Specifically, in one embodiment, as Figure 1 shown, the box body 110 includes an upper box body 111 and a lower box body 112. The lower box body 112 forms a receiving cavity with an opening. The upper box body 111 is used to cover the opening of the lower box body 112 and is fixedly connected to the lower box body 112. The receiving cavity houses the battery housing 100 and the battery 140. Please refer to Figure 2, within the accommodating cavity of the box body 110, two battery cases 100 are accommodated, and within each battery case 100, a plurality of batteries 140 are accommodated. Each battery 140 is provided with two spaced-apart pole columns 141 ( Figure 2 not indicated in the figure), the arrangement direction of the two pole columns 141 is perpendicular to the arrangement direction of the plurality of batteries 140, each pole column 141 is located on the same side of the plurality of batteries 140 and extends towards the upper box body 111. Please refer to Figure 3 and Figure 4 , the upper shell 20 of each battery case 100 extends along the arrangement direction of the plurality of batteries 140 and is fixedly connected to the lower shell 10. The upper shell 20 is located between the two pole columns 141 and is spaced from the two pole columns 141. Spaces for the pole columns 141 to pass through are formed on both sides of the upper shell 20. The upper shell 20 also at least partially adheres to the plurality of batteries 140 respectively to limit the displacement of the batteries 140 relative to the battery case 100.

[0041] In Figure 1 and Figure 2 the provided battery pack 200, the lower box body 112 of the battery pack 200 includes two lead-out poles 1121. Each pole column 141 is electrically connected to the lead-out pole 1121 through a lead-out member 130. An external electrical device can be electrically connected to the two lead-out poles 1121 to achieve electrical connection with the battery 140.

[0042] In addition, in Figure 1 the provided battery pack 200, the upper box body 111 of the battery pack 200 includes two handles 1111. The two handles 1111 facilitate the movement and transportation of the battery pack 200. In some other embodiments, the handles 1111 can also be provided on the lower box body 112, and the number and position of the handles 1111 can be set arbitrarily based on user requirements.

[0043] In Figure 2 the provided battery pack 200, the arrangement direction of the plurality of batteries 140 intersects with the arrangement direction of the battery case 100 to improve the space utilization rate of the internal space of the battery pack 200 and increase the energy density of the battery pack 200.

[0044] In the battery case 100 of the present application, along the direction perpendicular to the extension direction of the pole column 141, the lower shell 10 includes a pair of first side walls 11 and a pair of second side walls 12. Each first side wall 11 is connected between the two second side walls 12. The two end faces of the pair of first side walls 11 opposite to each other respectively include a first connection portion 13, and the two end faces of the pair of second side walls 12 opposite to each other respectively include a second connection portion 14. The two first connection portions 13 and the two second connection portions 14 are arranged alternately along the extension direction of the pole column 141.

[0045] Specifically, in one embodiment, as shown in Figure 3As shown, the arrangement directions of a pair of first side walls 11 are perpendicular to those of a pair of second side walls 12. Two first connecting parts 13 are respectively located at one end of the pair of first side walls 11 facing the upper housing 20. The two first connecting parts 13 extend from the first side walls 11 in opposite directions. Two second connecting parts 14 are respectively located at one end of the pair of second side walls 12 facing the upper housing 20. The two second connecting parts 14 extend from the second side walls 12 in opposite directions. Along the extending direction of the pole column 141, the size of the first side wall 11 is different from that of the second side wall 12, and there is a distance difference between the first connecting part 13 and the second connecting part 14.

[0046] In Figure 3 In the provided battery pack 200, a plurality of batteries 140 are arranged along the arrangement direction of the pair of first side walls 11, so that the battery housing 100 is rectangular. Compared with the direction of the pair of second side walls 12, the dimension along the direction of the pair of first side walls 11 is larger. Correspondingly, the dimension of the second connecting part 14 along the arrangement direction of the pair of first side walls 11 is larger than the dimension of the first connecting part 13 along the arrangement direction of the pair of second side walls 12, so that the second connecting part 14 has a sufficient contact area to be connected to the box body 110, thereby ensuring a reliable connection between the battery housing 100 and the box body 110.

[0047] The battery housing 100 of the present application is provided with two first connecting parts 13 and two second connecting parts 14. Along the direction perpendicular to the extending direction of the pole column 141, the two first connecting parts 13 and the two second connecting parts 14 are respectively used for fixedly connecting to the box body 110. The battery housing 100 is connected to the box body 110 in multiple directions, so that the connection between the battery housing 100 and the box body 110 is more reliable.

[0048] In the existing battery housing, the battery is fixed in the box body through the battery housing. The connection positions of the battery housing are often on the same side of the battery housing. The single connection position can limit the displacement of the battery relative to the box body to a certain extent, but it is difficult to limit the attitude change of the battery relative to the box body. Especially during transportation and movement, dynamic loads from multiple directions are more likely to cause the battery to shake or even overturn in the box body.

[0049] It can be understood that the attitude change of the battery relative to the box body easily causes the pole column of the battery to contact the box body or other components in the box body, making the box body charged, which poses a safety hazard. For some batteries with a relatively large rated current, even if the distance between the box body and the pole column is reduced, it can still make the box body charged, endangering the life safety of users.

[0050] In addition, the attitude change of the battery relative to the box body may also cause the connection between the lead-out piece in the box body and the battery pole column to fail, resulting in the battery being unable to supply power to external electrical equipment.

[0051] The first connecting portion 13 and the second connecting portion 14 of the battery housing 100 of the present application are arranged staggered along the extending direction of the pole 141. There is a height difference between the first connecting portion 13 and the second connecting portion 14. The two first connecting portions 13 and the two second connecting portions 14 cooperate with each other to limit the attitude of the battery housing 100 relative to the box body 110, thereby maintaining the orientation of the pole 141 of the battery 140 relative to the box body 110, avoiding the box body being charged due to the change of the attitude of the battery 140 during the transportation or movement of the box body 110, and eliminating potential safety hazards. At the same time, the orientation of the pole 141 of the battery 140 remains unchanged relative to the box body 110, which is convenient for the lead-out member 130 of the box body 110 or external electrical equipment to cooperate with the pole of the battery to realize the power supply of the battery.

[0052] The present application also provides a battery pack 200. The battery pack 200 includes a box body 110, at least one battery 140 and at least one of the above-mentioned battery housings 100. The first connecting portion 13 and the second connecting portion 14 of the battery housing 100 are respectively used for fixedly connecting with the box body 110, and the lower housing 10 of each battery housing 100 is used for fixing at least one battery 140.

[0053] It can be understood that because the battery pack 200 of the present application adopts the above-mentioned battery housing 100, the orientation of the battery 140 relative to the box body 110 remains unchanged, so that the battery pack 200 can be applied to scenarios with more dynamic loads. Moreover, the battery 140 and the box body 110 are connected through two first connecting portions 13 and two second connecting portions 14, having higher reliability and service life.

[0054] It should be noted that the battery housing 100 of the present application can not only be applied to the battery pack 200, but also be equally applicable in other devices or systems having a battery 140. It can be applied to scenarios with dynamic loads and has better reliability and service life.

[0055] Please refer to Figure 5 and Figure 6 wherein, Figure 5 schematically shows a structural schematic diagram of the box body 110 provided in an embodiment of the present application from one perspective; Figure 6 schematically shows a structural schematic diagram of the box body 110 provided in an embodiment of the present application from another perspective.

[0056] In one embodiment, a bracket 113 is fixed in the box body 110. The bracket 113 includes two first fixing portions 1131 and two second fixing portions 1132. Each first fixing portion 1131 is used for fixedly connecting with one first connecting portion 13, and each second fixing portion 1132 is used for fixedly connecting with one second connecting portion 14.

[0057] In Figure 5and Figure 6 In the provided housing 110, the bracket 113 is disposed around the inner side of the housing 110 and fixedly connected to the housing 110. The bracket 113 includes two first fixing portions 1131 and two second fixing portions 1132. The arrangement direction of the two first fixing portions 1131 intersects with the arrangement direction of the two second fixing portions 1132. The height of the first fixing portion 1131 is greater than the height of the second fixing portion 1132. Please refer to Figure 2 , the two first fixing portions 1131 are respectively located on the side of the two first connecting portions 13 away from the battery 140. Each first fixing portion 1131 is fixedly connected to a first connecting portion 13. The two second fixing portions 1132 are respectively located on the side of the two second connecting portions 14 away from the battery 140. Each second fixing portion 1132 is fixedly connected to a second connecting portion 14 to achieve the fixed connection between the housing 110 and the battery housing 100.

[0058] In one embodiment, along the extending direction of the pole 141, the first fixing portion 1131 is located below the first connecting portion 13.

[0059] In another embodiment, along the extending direction of the pole 141, the second fixing portion 1132 is located below the second connecting portion 14.

[0060] In Figure 2 In the provided battery pack 200, along the extending direction of the pole 141, the first fixing portion 1131 is located below the first connecting portion 13 and the second fixing portion 1132 is located below the second connecting portion 14. The first fixing portion 1131 of the bracket 113 is located below the first connecting portion 13 to support the first connecting portion 13, and the second fixing portion 1132 of the bracket 113 is located below the second connecting portion 14 to support the second connecting portion 14, thereby supporting the battery housing 100.

[0061] In one embodiment, along the extending direction of the pole 141, the first fixing portion 1131 is located below the first connecting portion 13, and the second fixing portion 1132 is located above the second connecting portion 14. The first fixing portion 1131 and the second fixing portion 1132 have the same height. The first fixing portion 1131 and the second fixing portion 1132 of the bracket 113 are at the same height. The first fixing portion 1131 and the second fixing portion 1132 are located between the first connecting portion 13 and the second connecting portion 14. The first fixing portion 1131 faces upward and is connected to the first connecting portion 13, and the second fixing portion 1132 faces downward and is connected to the second connecting portion 14, thereby fixing the bracket 113 to the battery housing 100.

[0062] In one embodiment, at least one of the two first fixing parts 1131 and the two second fixing parts 1132 is detachably connected to the body of the bracket 113. The detachable first fixing part 1131 or second fixing part 1132 enables the removal of the first fixing part 1131 or second fixing part 1132 before the battery housing 100 is installed into the box body 110, reducing interference between the battery housing 100 and the box body 110 during the assembly process and facilitating the assembly of the battery housing 100 and the box body 110. Meanwhile, when multiple battery housings 100 are provided in the box body 110, interference between the multiple battery housings 100 can also be reduced.

[0063] It can be understood that when the first fixing part 1131 and the second fixing part 1132 of the bracket 113 are at the same height and are located between the first connecting part 13 and the second connecting part 14, there is interference between the battery housing 100 and the box body 110 during the assembly process. Removing the first fixing part 1131 or the second fixing part 1132 can facilitate the installation of the battery housing 100.

[0064] In Figure 6 the provided box body 110, the bracket 113 includes a fixed beam 1133. Please refer to Figure 2 , the fixed beam 1133 is located between two battery housings 100 and is used to be fixedly connected to the second connecting part 14 between the two housings 100 respectively, so that the two battery housings 100 are fixedly connected to the box body 110.

[0065] Please refer to Figures 7-10 , where Figure 7 shows a schematic structural view of the battery housing 100 provided in one embodiment of the present application; Figure 8 shows a schematic structural view of the lower housing 10 provided in one embodiment of the present application from one perspective; Figure 9 shows a schematic structural view of the lower housing 10 provided in one embodiment of the present application from another perspective; Figure 10 shows a schematic structural view of the lower housing 10 provided in one embodiment of the present application from another perspective.

[0066] In one embodiment, the distance between the first connecting part 13 and the second connecting part 14 along the extending direction of the pole 141 is greater than or equal to half of the size of the battery 140.

[0067] In another embodiment, the distance between the first connecting part 13 and the second connecting part 14 along the extending direction of the pole 141 is less than the size of the battery 140.

[0068] In Figure 7In the provided battery housing 100, the distance between the first connection portion 13 and the second connection portion 14 is greater than or equal to half of the size of the battery 140, and the distance between the first connection portion 13 and the second connection portion 14 is less than the size of the battery 140.

[0069] It can be understood that restricting the distance between the first connection portion 13 and the second connection portion 14 to be greater than or equal to half of the size of the battery 140 can ensure the height difference between the first connection portion 13 and the second connection portion 14, so that the shear forces borne by the first connection portion 13 and the second connection portion 14 are of appropriate magnitudes; restricting the distance between the first connection portion 13 and the second connection portion 14 to be less than the size of the battery 140 can reduce the size of the battery housing 100 in the direction along the pole 141, improving the space utilization rate inside the box 110.

[0070] In one embodiment, along a direction perpendicular to the extension direction of the pole 141, the projections of the first connection portion 13 and the second connection portion 14 on the battery 140 at least partially coincide with the battery 140.

[0071] In Figure 7 In the provided battery housing 100, the projections of the first connection portion 13 and the second connection portion 14 on the battery 140 are at least partially located inside the battery 140, so as to reduce the size of the battery housing 100 in the direction perpendicular to the extension direction of the pole 141 and improve the space utilization rate inside the box 110.

[0072] In one embodiment, the battery housing 100 is rectangular, the length of the first side wall 11 is greater than the length of the second side wall 12, and the dimension by which the first connection portion 13 protrudes from the first side wall 11 is greater than the dimension by which the second connection portion 14 protrudes from the second side wall 12.

[0073] In Figure 7 In the provided battery housing 100, a plurality of batteries 140 are arranged along the arrangement direction of a pair of first side walls 11, such that the battery housing 100 is rectangular. Compared with the direction along a pair of second side walls 12, the dimension in the direction along a pair of first side walls 11 is larger, and the size of the first connection portion 13 is greater than the size of the second connection portion 14, so that the second connection portion 14 has sufficient contact area to connect with the box 110, thereby ensuring a reliable connection between the battery housing 100 and the box 110 to ensure a reliable connection between the first connection portion 13 and the first fixing portion 1131.

[0074] In one embodiment, the two first connection portions 13 are formed by folding a pair of first side walls 11 in opposite directions respectively, and the two second connection portions 14 are formed by folding a pair of second side walls 12 in opposite directions respectively.

[0075] In Figures 8-10In the provided lower housing 10, both the first side wall 11 and the second side wall 12 are made of sheet metal. One end of each first side wall 11 is fixedly connected to the two end faces of the second side wall 12 respectively. One pair of first side walls 11 are folded away from the second side wall 12 at one end in opposite directions to form a first connecting portion 13, and one pair of second side walls 12 are folded in opposite directions to form a second connecting portion 14, which facilitates the processing of the battery housing 100.

[0076] It can be understood that along the extending direction of the pole 141, the size of the first side wall 11 is larger than that of the second side wall 12, so that the first connecting portion 13 formed by folding is located above the second connecting portion 14; at the same time, a larger area of the battery 140 can be exposed on one side of the second side wall 12, which is convenient for the heat dissipation of the battery 140.

[0077] In one embodiment, the upper housing 20 of the battery housing 100 extends along the arrangement direction of the plurality of batteries 140 and is fixedly connected to the lower housing 10. The upper housing 20 is located between the two poles 141 and is spaced from the two poles 141. Spaces for the poles 141 to pass through are formed on both sides of the upper housing 20. The upper housing 20 also at least partially adheres to the plurality of batteries 140 respectively to limit the displacement of the batteries 140 relative to the battery housing 100.

[0078] In one embodiment, a protrusion 15 is provided at one end of each first side wall 11 away from the second side wall 12. The two protrusions 15 are used to be fixedly connected to the upper housing 20 respectively to realize the connection between the upper housing 20 and the lower housing 10.

[0079] In one embodiment, the lower housing 10 includes a bottom plate 16. The bottom plate 16 is located between the two second side walls 12 and is fixedly connected to the two second side walls 12. The surface of the bottom plate 16 on the side away from the upper housing 20 is located below the end face of the first side wall 11 on the side away from the upper housing 20, so that at least part of the battery housing 100 is in contact with the bottom surface of the box body 110, improving the stability of the battery housing 100.

[0080] In one embodiment, a liquid injection hole is provided on the side of the battery 140 facing the upper housing. The through hole of the upper housing 20 is also used to allow the liquid injection hole exposing at least part of the battery 140.

[0081] In Figure 5 In the provided battery housing 100, the upper housing is provided with a through hole 21. The through hole 21 is used to expose the liquid injection hole. Since the two first connecting portions 13 and the two second connecting portions 14 cooperate with each other to limit the posture of the battery housing 100 relative to the box body 110, the orientation of the liquid injection hole of the battery 140 relative to the box body 110 can also be maintained. The liquid injection hole with a fixed orientation is convenient for subsequent replenishment of the electrolyte in the battery 140.

[0082] In Figure 7In the provided battery housing 100, the battery housing 100 includes a plurality of partition plates 30, and each partition plate 30 is located between two batteries 140 for separating the two batteries 140.

[0083] Please refer to Figure 11 The schematic diagram of the internal structure of the battery pack 200 provided in another embodiment of the present application.

[0084] In Figure 11 In the provided battery pack 200, the battery pack 200 includes a support plate 151 and a circuit board 152. The support plate 151 is fixedly connected to the support member 22 of the upper housing 20, and the circuit board 152 is fixed to the side of the support plate 151 away from the upper housing 20. The circuit board 152 can be used to cut off or conduct the electrical connection between the battery 140 and the lead-out electrode 1121, or control the magnitude of the current between the battery 140 and the lead-out electrode 1121, thereby controlling the battery pack 200.

[0085] In addition, in Figure 11 In the provided battery pack 200, the battery pack 200 further includes a heat dissipation plate 160. The heat dissipation plate 160 is provided with grids arranged at intervals for dissipating heat of the circuit board 152.

[0086] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the said embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A battery housing, characterized in that, The battery housing is located inside the box body. The battery housing includes an upper housing and a lower housing. The lower housing is used to fix the battery. The upper housing is fixed to the lower housing and has a through hole allowing the pole column of the battery to pass through; Along the direction perpendicular to the extension direction of the pole column, the lower housing includes a pair of first side walls and a pair of second side walls. Each of the first side walls is connected between the two second side walls. The two end faces of the pair of first side walls facing away from each other respectively include a first connecting portion, and the two end faces of the pair of second side walls facing away from each other respectively include a second connecting portion. The two first connecting portions and the two second connecting portions are arranged staggeredly along the extension direction of the pole column.

2. The battery housing according to claim 1, wherein, A bracket is fixed inside the box body. The bracket includes two first fixing portions and two second fixing portions. Each of the first fixing portions is used for fixedly connecting a first connecting portion, and each of the second fixing portions is used for fixedly connecting a second connecting portion. Along the extension direction of the pole column, the first fixing portion is located below the first connecting portion; and / or Along the extension direction of the pole column, the second fixing portion is located below the second connecting portion.

3. The battery housing according to claim 2, wherein, Along the extension direction of the pole column, the first fixing portion is located below the first connecting portion, the second fixing portion is located above the second connecting portion, and the first fixing portion and the second fixing portion have the same height.

4. The battery housing according to claim 3, characterized in that, At least one of the two first fixing portions and the two second fixing portions is detachably connected to the main body of the bracket.

5. The battery housing according to any one of claims 1-4, characterized in that, Along the extension direction of the pole column, the distance between the first connecting portion and the second connecting portion is greater than or equal to half of the size of the battery; and / or Along the extension direction of the pole column, the distance between the first connecting portion and the second connecting portion is less than the size of the battery.

6. The battery housing according to claim 5, wherein, Along the direction perpendicular to the extension direction of the pole column, the projections of the first connecting portion and the second connecting portion on the battery at least partially coincide with the battery.

7. The battery housing according to any one of claims 1-4, characterized in that, The battery housing is rectangular. The length of the first side wall is greater than the length of the second side wall. The size of the first connecting portion protruding from the first side wall is greater than the size of the second connecting portion protruding from the second side wall.

8. The battery housing according to claim 1, characterized in that, The two first connecting portions are formed by folding a pair of the first side walls in opposite directions respectively, and the two second connecting portions are formed by folding a pair of the second side walls in opposite directions respectively.

9. The battery housing according to claim 1, wherein, A liquid injection hole is provided on the side of the battery facing the upper housing. The through hole of the upper housing is also used to allow the liquid injection hole of the battery to expose at least a part of the battery.

10. A battery pack, characterized in that, It includes a box body, at least one battery, and at least one battery housing according to any one of claims 1-9. The first connecting portion and the second connecting portion of the battery housing are respectively used for fixedly connecting with the box body, and the lower housing of each battery housing is used to fix the at least one battery.

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