Battery box and energy storage device

Abstract

The utility model relates to the technical field of energy storage batteries, in particular to a battery box and an energy storage device, and the battery box comprises a first shell, a transition supporting piece, a second shell and a sealing component; the transition supporting piece is arranged between the first shell and the second shell and connected with the first shell and the second shell to form a shell. The transition support forms a first mating portion located inside the housing, the second housing forms a second mating portion located inside the housing, and the sealing member is compressed between the first mating portion and the second mating portion. Visibly, the transition supporting piece is installed at the butt joint position of the second shell and the first shell, the first matching part and the second matching part are introduced into the shell, and the sealing component is installed between the two matching parts, so that all structures are hidden in the shell and cannot protrude out of the shell; therefore, the residual space in the shell can be fully utilized, the space utilization rate can be improved, the capacitance of the battery box is improved, and the appearance is more attractive.

Description

Technical Field

[0001] This application relates to the field of energy storage battery technology, and in particular to a battery housing and energy storage device. Background Technology

[0002] Currently, battery boxes mainly consist of a box body, a cover, and battery modules. After the battery modules are installed into the box body, they are sealed by the cover. Typically, the box body and cover are designed with outward-flaring edges. The upper and lower flanges are fitted together, and a compression sealing ring is formed between them. Finally, bolts are used to tighten the box, thus completing the basic assembly of the battery box. However, since the overall outer dimensions of the battery box are fixed, the external flanges occupy overall space, which in turn compresses the internal space of the battery modules and reduces the battery capacity. Therefore, there is an urgent need to develop battery box designs that can improve space utilization while ensuring waterproof performance. Utility Model Content

[0003] The purpose of this application is to provide a battery housing and energy storage device, which to a certain extent solves the technical problem in the prior art of urgently developing a battery housing that can improve space utilization while ensuring waterproof performance.

[0004] This application provides a battery housing, including: a first housing, a transition support, a second housing, and a sealing member; wherein, the transition support is disposed between the first housing and the second housing, and is connected to both to form an outer shell; the transition support has a first mating portion located inside the outer shell, the second housing has a second mating portion located inside the outer shell, and the sealing member is compressed between the first mating portion and the second mating portion.

[0005] In the above technical solution, the transition support includes a closed portion and a first mating portion connected together; wherein, the two ends of the closed portion are respectively connected to the first housing and the second housing; the first mating portion is disposed on the inner side of the closed portion, and the sealing member is disposed on the side of the first mating portion near the second housing.

[0006] In any of the above technical solutions, the second housing further includes a body, an assembly step portion, an auxiliary mounting portion, and a second mating portion connected in sequence; wherein, the assembly step portion is located on the side of the closure portion near the second housing, the auxiliary mounting portion and the second mating portion are both disposed on the inner side of the closure portion, and the second mating portion is disposed on the side of the auxiliary mounting portion near the sealing member.

[0007] In any of the above technical solutions, the auxiliary mounting part is further provided with a mounting blind hole, the sealing part is provided with a mounting through hole corresponding to the mounting blind hole, and a first fastening member is installed in the mounting blind hole and the mounting through hole to lock the second housing and the transition support together, and the first mating part, the second mating part and the sealing member between them are used to separate the mounting area of ​​the first fastening member from the interior of the housing.

[0008] In any of the above technical solutions, the first mating part is further provided with a first mounting groove, and the sealing member is installed in the first mounting groove.

[0009] In any of the above technical solutions, further, along the arrangement direction of the first housing, the transition support and the second housing, the first mating part abuts against the second mating part, the depth of the first mounting groove is H, the thickness of the sealing member in the uncompressed state is h, the compression ratio of the sealing member is X, and X=(hH) / h.

[0010] In any of the above technical solutions, the compression ratio of the sealing member is X, and 0.25 < X < 0.45.

[0011] In any of the above technical solutions, the battery housing further includes an insulating member, and along the arrangement direction of the first housing, the transition support member and the second housing, the insulating member is disposed on the side of the transition support member close to the first housing, and the insulating member is used to abut against the end of the battery module installed in the housing.

[0012] In any of the above technical solutions, the transition support member is further provided with a second mounting groove, the insulating member is provided with a mating protrusion, and the mating protrusion is installed in the second mounting groove.

[0013] In any of the above technical solutions, the insulating component is further described as a ring structure.

[0014] In any of the above technical solutions, the insulating member and the transition support member are further connected by thermal fusion.

[0015] In any of the above technical solutions, the insulating component is further made of plastic polymer.

[0016] In any of the above technical solutions, one of the first housing and the second housing is an upper housing, and the other is a lower housing. The upper housing is provided with a handle, and the lower housing is formed with a groove. The depth of the groove is W, and 5mm < W < 7mm.

[0017] In any of the above technical solutions, the transition support is further described as a ring structure.

[0018] In any of the above technical solutions, the sealing member is further described as an annular structure.

[0019] In any of the above technical solutions, the transition support is further connected to the first housing by welding.

[0020] In any of the above technical solutions, further, along the arrangement direction of the first housing, the transition support and the second housing, the first mating part and the second mating part abut against each other.

[0021] In any of the above technical solutions, the transition support is further made of metal.

[0022] This application also provides an energy storage device, including a battery module and a battery housing as described in any of the above technical solutions, wherein the battery module is disposed within the battery housing. Therefore, it possesses all the beneficial technical effects of this battery housing, which will not be elaborated further here.

[0023] In the above technical solution, the energy storage device further includes a battery management module, and along the arrangement direction of the first housing, the transition support and the second housing, the battery management module is disposed at the top or bottom of the battery module, and the first mating part and the second mating part are located in the empty space on the side of the battery management module.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] This application provides a novel battery housing. By installing a transition support at the junction of the second housing and the first housing, and introducing a first mating part and a second mating part inside the housing, a sealing member is installed between the first and second mating parts inside the housing. This allows all structures to be hidden inside the housing without protruding, thus making full use of the remaining space inside the housing, improving space utilization, increasing the battery housing's capacity, and making the appearance more aesthetically pleasing. Furthermore, since one of the two mating parts is designed on a housing and the other on the transition support, there will be no interference during the assembly of the battery module and the housing, allowing for normal assembly and ensuring assembly efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 An exploded view of the battery housing provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the battery housing provided in an embodiment of this application;

[0029] Figure 3 This is another structural schematic diagram of the battery housing provided in an embodiment of this application;

[0030] Figure 4 for Figure 3 A sectional view along section AA;

[0031] Figure 5 for Figure 4 A magnified structural diagram at point B;

[0032] Figure 6 This is a schematic diagram of the structure of the transition support provided in the embodiments of this application;

[0033] Figure 7 This is another structural schematic diagram of the transition support member provided in the embodiments of this application;

[0034] Figure 8 Another structural schematic diagram of the transition support member provided in the embodiments of this application;

[0035] Figure 9 for Figure 8 A sectional view along section CC;

[0036] Figure 10 for Figure 9 A magnified structural diagram at point D;

[0037] Figure 11 A schematic diagram of the structure of the second housing provided in an embodiment of this application;

[0038] Figure 12 This is a schematic diagram of the structure of the sealing member provided in the embodiments of this application;

[0039] Figure 13 This is another structural schematic diagram of the sealing member provided in the embodiments of this application;

[0040] Figure 14This is a partial structural diagram of the battery box provided in an embodiment of this application.

[0041] Figure label:

[0042] 1-First housing, 2-Transition support, 21-Closed part, 211-Mounting through hole, 22-First mating part, 221-First mounting groove, 222-Second mounting groove, 3-Second housing, 31-Body, 32-Assembly step part, 33-Auxiliary mounting part, 331-Straight part, 332-Columnar part, 333-Avoidance through hole, 334-Mounting blind hole, 34-Second mating part, 35-Groove, 4-Sealing member, 5-Insulating member, 6-Battery module, 7-Battery management module, a-Height direction of the housing. Detailed Implementation

[0043] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0044] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0045] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The following reference Figures 1 to 14 This application describes a battery housing and energy storage device according to some embodiments.

[0049] Example 1

[0050] See Figures 1 to 14 As shown, an embodiment of this application provides a battery housing, including: a first housing 1, a transition support 2, a second housing 3, and a sealing member 4; wherein, the transition support 2 is disposed between the first housing 1 and the second housing 3, and is connected to both to form an outer shell; the transition support 2 forms a first mating portion 22 located inside the outer shell, the second housing 3 forms a second mating portion 34 located inside the outer shell, and the sealing member 4 is compressed between the first mating portion 22 and the second mating portion 34. It should be noted that the first housing 1 can be used as the lower housing and the second housing 3 as the upper housing, and this will be used as an example in the following description. Of course, it is not limited to this; the first housing 1 can also be used as the upper housing and the second housing 3 as the lower housing.

[0051] As can be seen from the structure described above, this application provides a novel battery box. By installing a transition support 2 at the junction of the second housing 3 and the first housing 1, and introducing a first mating part 22 and a second mating part 34 inside the housing, the sealing member 4 is installed between the first mating part 22 and the second mating part 34 inside the housing. This allows all structures to be hidden inside the housing without protruding from it, thus making full use of the remaining space inside the housing, improving space utilization, increasing the battery box's capacity, and making the appearance more aesthetically pleasing. Moreover, since one of the two mating parts is designed on a housing and the other on the transition support 2, there will be no interference during the assembly of the battery module 6 and the housing, allowing for normal assembly and ensuring assembly efficiency.

[0052] In this embodiment, preferably, as follows: Figures 5 to 10 As shown, the transition support 2 includes a closed part 21 and a first mating part 22 connected to each other; wherein, the two ends of the closed part 21 are respectively connected to the first housing 1 and the second housing 3; the first mating part 22 is disposed on the inner side of the closed part 21, and the second mating part 34 is disposed on the side of the auxiliary mounting part 33 near the sealing member 4.

[0053] As can be seen from the structure described above, the closing part 21 serves to dock with the first housing 1 and the second housing 3, and also serves to seal the structure and act as a supporting body; the first mating part 22 serves to support the sealing member 4.

[0054] Furthermore, preferably, the closure part 21 and the first mating part 22 are an integral structure. Of course, it is not limited to this and can also be a separate structure that is assembled together later.

[0055] In this embodiment, preferably, as follows: Figure 5 and Figure 11 As shown, the second housing 3 includes a body 31, an assembly step portion 32, an auxiliary mounting portion 33, and a second mating portion 34 connected in sequence; wherein, the assembly step portion 32 is located on the side of the closure portion 21 near the second housing 3, the auxiliary mounting portion 33 and the second mating portion 34 are both disposed on the inner side of the closure portion 21, and the second mating portion 34 is disposed on the side near the sealing member 4.

[0056] As can be seen from the structure described above, the assembly step 32 is located on top of the closed part 21, thereby realizing the docking of the second shell 3 and the transition support 2; the second mating part 34 and the first mating part 22 cooperate to play the role of compression components, thereby playing the role of dustproof and waterproof, making the structure more reliable.

[0057] Furthermore, preferably, along the arrangement direction of the first housing 1, the transition support 2, and the second housing 3, that is, the height direction a of the outer shell, the first mating part 22 and the second mating part 34 abut together. That is to say, the first mating part 22 and the second mating part 34 are both arranged along the height direction a perpendicular to the outer shell, which facilitates assembly and manufacturing. Of course, it is not limited to this. The first mating part 22 and the second mating part 34 are both arranged in a direction that forms an acute angle with the height direction a of the outer shell, or are directly arranged along the height direction a of the outer shell, etc., depending on the actual needs.

[0058] In this embodiment, preferably, as follows: Figure 5 and Figure 10 As shown, the auxiliary mounting part 33 has a mounting blind hole 334, and the sealing part 21 has a mounting through hole 211 corresponding to the mounting blind hole 334. A first fastening member, such as a screw or bolt, is installed in the mounting blind hole 334 and the mounting through hole 211 to lock the second housing 3 and the transition support 2 together, that is, to fix the second housing 3 and the transition support 2 together, making the structure more stable and reliable. The first mating part 22, the second mating part 34 and the sealing member 4 between them are used to separate the mounting area of ​​the first fastening member from the interior of the housing.

[0059] As can be seen from the structure described above, a blind hole is provided on the closed part 21, and the first fastening component, such as a screw or bolt, can be installed in the blind hole to play a waterproof role. Furthermore, the area where the first fastening component, such as a screw or bolt, is installed is separated from the internal area of ​​the outer shell by the first mating part 22, the second mating part 34, and the sealing component 4 between them, resulting in a better sealing effect.

[0060] Further, preferably, the auxiliary mounting portion 33 includes a straight portion 331 and a columnar portion 332, wherein the straight portion 331 is disposed along the height direction a of the outer casing, and the columnar portion 332 extends toward the interior of the outer casing along a direction perpendicular to the height direction a of the outer casing, and the columnar portion 332 is disposed on the inner side of the straight portion 331, that is, on the side closer to the interior of the outer casing; the straight portion 331 has an clearance through hole 333, and the columnar portion 332 has the aforementioned mounting blind hole 334; the aforementioned second mating portion 34 is connected to the side of the straight portion 331 near the battery module 6. In this embodiment, preferably, as Figure 5 , Figure 6 and Figure 10 As shown, the first mating part 22 has a first mounting groove 221, and the sealing member 4 is installed in the first mounting groove 221.

[0061] As can be seen from the structure described above, installing the sealing member 4 in the first mounting groove 221 makes the sealing member 4 more stable, preventing displacement and ensuring sealing performance. Alternatively, the first mounting groove 221 can be omitted, and a groove 35 can be provided on the second mating part 34. Or, neither the first mating part 22 nor the second mating part 34 can have a groove 35 provided; instead, the sealing member 4 can be directly bonded between the mating planes of the two first mating parts 22 and the second mating part 34.

[0062] In this embodiment, preferably, as follows: Figure 5 , Figure 10 and Figure 13 As shown, along the arrangement direction of the first housing 1, the transition support 2 and the second housing 3, the first mating part 22 abuts against the second mating part 34, the depth of the first mounting groove 221 is H, the thickness of the sealing member 4 in the uncompressed state is h, the compression ratio of the sealing member 4 is X, and X=(hH) / h.

[0063] As can be seen from the structure described above, the depth H of the first mounting groove 221 is first set, and an appropriate compression ratio X is selected. Then, the thickness h of the sealing member 4 can be calculated using the above calculation formula, thereby selecting a sealing member 4 of appropriate thickness to ensure the sealing effect.

[0064] Furthermore, preferably, the compression ratio of the sealing member 4 is X, and 0.25 < X < 0.45. The sealing effect of the sealing member 4 is best within this range.

[0065] In this embodiment, preferably, as follows: Figure 5 As shown, the battery housing also includes an insulating member 5, and along the arrangement direction of the first housing 1, the transition support 2 and the second housing 3, the insulating member 5 is disposed on the side of the transition support 2 near the first housing 1, and the insulating member 5 is used to abut against the end of the battery module 6 installed in the housing.

[0066] As can be seen from the structure described above, the insulating member 5 provides stable support for the aforementioned first mating part 22 and the second mating part 34 with the first mating part 22, preventing the first mating part 22 from being suspended and improving the stability of the structure. Moreover, when the transition support member 2 is a metal part, the insulating member 5 separates the battery module 6 from the transition support member 2, preventing short circuits and other problems from occurring, thus playing an insulating protection role, making it safer and more reliable.

[0067] It should be noted that: the above-mentioned insulating component 5 may not be provided. Instead, an insulating layer may be provided on the inner side of the transition support 2, or the first housing 1 may be set higher, thereby raising the transition support 2 and moving it away from the battery module 6, etc.

[0068] In this embodiment, preferably, as follows: Figure 5 and Figure 7 As shown, the transition support 2 has a second mounting groove 222, and the insulating member 5 has a mating protrusion, which is installed in the second mounting groove 222.

[0069] As can be seen from the structure described above, the protrusion is installed in the second mounting groove 222, so that the insulating member 5 and the transition support member 2 form an interlocking structure, making them more secure and stable after heat fusion.

[0070] It should be noted that the connection between the insulating component 5 and the transition support 2 is not limited to hot melting, but can also be achieved through other methods, such as ultrasonic welding, laser welding or adhesive bonding.

[0071] In addition, the aforementioned second mounting groove 222 and mating protrusion can also be provided, and the insulating member 5 and the transition support member 2 can only be mated by a planar fit, etc.

[0072] In this embodiment, preferably, as follows: Figure 1 As shown, the insulating component 5 has a ring structure, which has a large supporting area, good supporting effect, and further improves insulation.

[0073] In this embodiment, preferably, the insulating component 5 is made of plastic polymer, such as PP or PVC, to ensure insulation effect. Of course, it is not limited to this and can be selected according to actual needs.

[0074] It should be noted that the insulating component 5 is not limited to a ring structure. It can also be a part of a ring structure, and multiple components can be set at intervals along the entire circumference of the transition support 2, etc. The specific selection depends on the actual needs.

[0075] In this embodiment, preferably, as follows: Figure 4As shown, one of the first housing 1 and the second housing 3 is the upper housing, and the other is the lower housing. The upper housing is provided with a handle, and the lower housing is formed with a groove 35. The depth of the groove 35 is W, and 5mm < W < 7mm.

[0076] Based on the structure described above, it can be seen that the depth of the groove 35 on the lower housing is too large, occupying the space of the battery module 6, while the depth of the groove 35 on the lower housing is too small, making it inconvenient to hold. Therefore, the depth W of the groove 35 is set between 5mm and 7mm to make it easy to hold while ensuring space utilization.

[0077] In this embodiment, preferably, as follows: Figure 1 As shown, the transition support 2 is a ring structure, which corresponds to the ring opening of the first housing 1 and the second housing 3, thus meeting the installation requirements.

[0078] In this embodiment, preferably, as follows: Figure 1 and Figure 12 As shown, the sealing component 4 is a ring structure, such as a sealing ring, which plays a role in complete sealing.

[0079] In this embodiment, preferably, the transition support 2 is connected to the first housing 1 by welding. The welded structure is more robust and the operation is simple and convenient.

[0080] In this embodiment, preferably, the transition support 2 is made of metal, which has high strength and is not easily damaged.

[0081] Furthermore, preferably, the first housing 1, the second housing 3, and the transition support 2 are made of the same material, which facilitates procurement and subsequent welding with the first housing 1.

[0082] Example 2

[0083] See Figures 1 to 5 As shown, Embodiment 2 of this application also provides an energy storage device, including a battery module 6 and the battery housing described in Embodiment 1 above, wherein the battery module 6 is disposed within the battery housing. Therefore, it possesses all the beneficial technical effects of the battery housing, and the same technical features and beneficial effects will not be repeated here.

[0084] In this embodiment, preferably, as follows: Figures 1 to 5 As shown, the energy storage device also includes a battery management module 7, and along the arrangement direction of the first housing 1, the transition support 2 and the second housing 3, the battery management module 7 is disposed on the top or bottom of the battery module 6, and the first mating part 22 and the second mating part 34 are located in the empty space on the side of the battery management module 7.

[0085] As can be seen from the structure described above, since the length and width of the battery management module 7 are both smaller than those of the battery module 6, a spare space is formed on the side of the battery management module 7. The first mating part 22 and the second mating part 34 are then introduced into this spare space, so that the sealing member 4 is installed between the first mating part 22 and the second mating part 34 in this spare space. It can be seen that all structures are hidden inside the shell, making full use of the spare space inside the shell, which helps to improve space utilization, increase the battery box's capacity, and make the appearance more aesthetically pleasing. Moreover, one of the two mating parts is designed on the shell and the other is designed on the transition support 2, so there will be no interference during the assembly process of the battery module 6 and the shell, and normal assembly can be carried out to ensure assembly efficiency.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery housing, characterized in that, include: The system comprises a first housing, a transition support, a second housing, and a sealing member; wherein the transition support is disposed between the first housing and the second housing and is connected to both of them to form an outer shell; the transition support has a first mating portion located inside the outer shell, the second housing has a second mating portion located inside the outer shell, and the sealing member is compressed between the first mating portion and the second mating portion.

2. The battery housing according to claim 1, characterized in that, The transition support includes a closed portion and a first mating portion connected together; wherein, the two ends of the closed portion are respectively connected to the first housing and the second housing; the first mating portion is disposed on the inner side of the closed portion, and the sealing member is disposed on the side of the first mating portion near the second housing.

3. The battery housing according to claim 2, characterized in that, The second housing includes a body, an assembly step, an auxiliary mounting part, and a second mating part connected in sequence; wherein, the assembly step is located on the side of the closure part near the second housing, the auxiliary mounting part and the second mating part are both disposed on the inner side of the closure part, and the second mating part is disposed on the side of the auxiliary mounting part near the sealing member.

4. The battery housing according to claim 3, characterized in that, The auxiliary mounting portion has a mounting blind hole, and the sealing portion has a mounting through hole corresponding to the mounting blind hole. A first fastening member is installed in the mounting blind hole and the mounting through hole to lock the second housing and the transition support together. The first mating portion, the second mating portion, and the sealing member between them are used to separate the mounting area of ​​the first fastening member from the interior of the housing.

5. The battery housing according to claim 1, characterized in that, The first mating part has a first mounting groove, and the sealing member is installed in the first mounting groove.

6. The battery housing according to claim 5, characterized in that, Along the arrangement direction of the first housing, the transition support and the second housing, the first mating part abuts against the second mating part, the depth of the first mounting groove is H, the thickness of the sealing member in the uncompressed state is h, the compression ratio of the sealing member is X, and X=(hH) / h.

7. The battery housing according to claim 6, characterized in that, The compression ratio of the sealing member is X, and 0.25 < X < 0.

45.

8. The battery housing according to claim 1, characterized in that, The battery housing also includes an insulating member, and along the arrangement direction of the first housing, the transition support member and the second housing, the insulating member is disposed on the side of the transition support member closer to the first housing, and the insulating member is used to abut against the end of the battery module installed in the housing.

9. The battery housing according to claim 8, characterized in that, The transition support has a second mounting groove, and the insulating member has a mating protrusion, which is mounted within the second mounting groove; and / or The insulating component is a ring structure; and / or The insulating component is connected to the transition support by thermal fusion; and / or The insulating component is made of plastic polymer.

10. The battery housing according to any one of claims 1 to 9, characterized in that, One of the first housing and the second housing is an upper housing, and the other is a lower housing. The upper housing is provided with a handle, and the lower housing has a groove with a depth of W, where 5mm < W < 7mm; and / or The transition support is a ring structure; and / or The sealing component is a ring structure; and / or The transition support is connected to the first housing by welding; and / or Along the arrangement direction of the first housing, the transition support, and the second housing, the first mating portion abuts against the second mating portion; and / or The transition support is made of metal.

11. An energy storage device, characterized in that, It includes a battery module and a battery housing as described in any one of claims 1 to 10, wherein the battery module is disposed within the battery housing.

12. The energy storage device according to claim 11, characterized in that, The energy storage device further includes a battery management module, and along the arrangement direction of the first housing, the transition support and the second housing, the battery management module is disposed at the top or bottom of the battery module, and the first mating part and the second mating part are located in the empty space on the side of the battery management module.

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