Grounding device, battery box and energy storage system thereof

Abstract

The utility model discloses a grounding device, a battery box and an energy storage system of the battery box. The grounding device comprises a first connecting piece, a first grounding piece and a second grounding piece, the first connecting piece is suitable for being electrically connected with the battery module. The first grounding piece is arranged in the first connecting piece. The second grounding piece is electrically connected with the first grounding piece and the conductive piece. According to the grounding device provided by the utility model, the first connecting piece is provided with the first grounding piece, and the first grounding piece is electrically connected with the conductive piece through the second grounding piece, so that the grounding function of the grounding device is realized, and meanwhile, compared with traditional grounding equipment, the structure of the grounding device is simplified, and the grounding efficiency of the grounding device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding devices, in particular to a grounding device, a battery box and an energy storage system thereof. Background Art

[0002] In the prior art, in order to ensure that the equipment can be well grounded to effectively prevent static electricity accumulation, reduce electromagnetic interference, protect the equipment and ensure the personal safety of users, a grounding wire is usually connected to the outside of the equipment. However, the connection method of the existing grounding wire is relatively complicated, which reduces the grounding efficiency of the grounding device and increases the cost. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a grounding device to realize the grounding function of the grounding device, and at the same time, compared with the traditional grounding equipment, the structure of the grounding device is simplified and the grounding efficiency of the grounding device is improved.

[0004] Another object of the utility model is to provide a battery box using the above-mentioned grounding device.

[0005] Another object of the present utility model is to provide an energy storage system using the above-mentioned battery box.

[0006] According to the first aspect of the utility model, the grounding device includes: a first connecting member, which is suitable for being electrically connected to a battery module; a first grounding member, which is arranged in the first connecting member; and a second grounding member which is electrically connected to the first grounding member and a conductive member respectively.

[0007] According to the grounding device of the embodiment of the utility model, a first grounding member is arranged on the first connecting member, and the first grounding member is electrically connected to the conductive member through the second grounding member to realize the grounding function of the grounding device. At the same time, compared with the traditional grounding equipment, the structure of the grounding device is simplified and the grounding efficiency of the grounding device is improved.

[0008] According to some embodiments of the utility model, a countersunk hole is formed on the first connecting member, and the second grounding member is a grounding plate; the first grounding member includes a first conductive segment, the first conductive segment stops between the grounding plate and the step portion of the countersunk hole; a second conductive segment, one end of the second conductive segment is connected to the first conductive segment, and the second conductive segment is arranged in the countersunk hole.

[0009] According to some embodiments of the present invention, the grounding device further comprises an elastic member, one end of the elastic member abuts against a side of the first conductive segment facing the second conductive segment, and the other end of the elastic member abuts against the step portion.

[0010] According to some embodiments of the utility model, a first through hole is formed on the grounding plate; the first connecting member includes a first connecting portion; and a second connecting portion, wherein the second connecting portion is arranged on one side of the first direction of the first connecting portion, the second connecting portion and the first grounding member are arranged at intervals, the second connecting portion passes through the first through hole, and the second direction is perpendicular to the first direction.

[0011] According to some embodiments of the utility model, the first connecting member also includes at least one lug, which is arranged on the second connecting portion; and at least one first fastener, which is arranged corresponding to the lug, and each of the first fasteners passes through the lug and is connected to the second grounding member.

[0012] According to some embodiments of the present invention, the second grounding member is a grounding wire.

[0013] According to the battery box of the embodiment of the second aspect of the utility model, it includes: a box body, the box body has a accommodating cavity, the box body is a conductive member; a battery module, the battery module is arranged in the accommodating cavity; a grounding device, the grounding device is the grounding device according to the embodiment of the first aspect of the utility model, the first connecting member of the grounding device is arranged on the box body, the first connecting member is electrically connected to the battery module, and the second grounding member of the grounding device is electrically connected to the box body.

[0014] According to some embodiments of the utility model, the box body includes a top plate and a bottom plate arranged opposite to each other along a first direction, and the grounding device is arranged adjacent to the bottom plate; the battery box also includes a second connecting member, the second connecting member is arranged on the top plate, a third grounding member is provided on the second connecting member, and the third grounding member is electrically connected to the first connecting member.

[0015] According to some embodiments of the present invention, a second through hole is formed on the top plate, and part of the second connecting member passes through the second through hole to be electrically connected to the first connecting member of the adjacent battery box.

[0016] According to some embodiments of the present invention, a third through hole is formed on the second connecting member, and the second fastener passes through the third through hole to be connected to the top plate.

[0017] According to some embodiments of the present invention, the first connector or the second connector further includes a positive terminal connected to the positive electrode of the battery module; and a negative terminal connected to the negative electrode of the battery module.

[0018] According to some embodiments of the present utility model, the battery box further comprises a bracket, wherein the bracket is disposed in the accommodating cavity, the bracket is connected to the bottom plate, and the second connecting member is disposed on the bracket.

[0019] The energy storage system according to the third aspect of the utility model comprises: a plurality of battery boxes, wherein the battery boxes are battery boxes according to the second aspect of the utility model, wherein the plurality of boxes are stacked along a first direction, and two adjacent battery boxes are respectively a first battery box and a second battery box, and the first connector or the second connector of the first battery box cooperates with the second connector or the first connector of the second battery box.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is an exploded view of a grounding device according to an embodiment of the utility model;

[0023] Figure 2 is a schematic diagram of a grounding device according to an embodiment of the utility model from another angle;

[0024] Figure 3 is a cross-sectional view of a grounding device according to an embodiment of the utility model, wherein the first grounding member and the second grounding member are not shown;

[0025] Figure 4 is a schematic diagram of a second grounding member of a grounding device according to an embodiment of the utility model;

[0026] Figure 5 is a cross-sectional view of a grounding device according to an embodiment of the utility model;

[0027] Figure 6 is a schematic diagram of an energy storage system according to an embodiment of the utility model;

[0028] Figure 7 is a cross-sectional view of a second connecting member and a top plate of a battery box according to an embodiment of the utility model;

[0029] Figure 8 is a cross-sectional view of a second connecting member and a top plate of a battery box according to an embodiment of the utility model;

[0030] Fig. 9 It is a partial schematic diagram of a battery box according to an embodiment of the utility model;

[0031] Fig.10 It is a partial schematic diagram of a battery box according to another embodiment of the utility model.

[0032] Reference numerals:

[0033] 100: grounding device;

[0034] 1: first connecting member; 11: countersunk hole; 111: step portion; 12: first connecting portion; 13: second connecting portion; 14: lug; 15: first fastener; 2: first grounding member; 21: first conductive segment; 211: groove; 22: second conductive segment; 3: second grounding member (grounding plate); 31: first through hole; 4: elastic member;

[0035] 200: battery box;

[0036] 201: box body; 2011: accommodating cavity; 2012: top plate; 20121: second through hole; 2013: bottom plate; 202: battery module; 203: second connecting member; 2031: third connecting portion; 2032: fourth connecting portion; 2033: third through hole; 2034: second fastener; 204: third grounding member; 205: positive electrode terminal; 206: negative electrode terminal; 207: positive electrode wiring harness; 208: negative electrode wiring harness; 209: bracket;

[0037] 300: Energy storage system. DETAILED DESCRIPTION

[0038] Reference below Figure 1-Figure 10 A grounding device 100 according to an embodiment of the first aspect of the present invention is described.

[0039] like Figure 1-Figure 10 As shown, the grounding device 100 according to the first embodiment of the utility model includes a first connecting member 1, a first grounding member 2 and a second grounding member 3.

[0040] Specifically, the first connecting member 1 is suitable for being electrically connected to the battery module 202. The first grounding member 2 is disposed in the first connecting member 1. The second grounding member 3 is electrically connected to the first grounding member 2 and the conductive member, respectively.

[0041] For example, in Figure 1-Figure 5 In the example, the first connector 1 and the battery module 202 may be connected by a connecting wire to ensure the electrical connection stability between the first connector 1 and the battery module 202. The first connector 1 completes the grounding path through the first grounding member 2, the second grounding member 3 and the conductive member, thereby realizing the grounding function of the grounding device 100. At the same time, compared with the traditional grounding equipment, the structure of the grounding device 100 is simplified, and the assembly efficiency of the grounding device 100 is improved.

[0042] According to the grounding device 100 of the embodiment of the utility model, a first grounding member 2 is provided on the first connecting member 1, and the first grounding member 2 is electrically connected to the conductive member through the second grounding member 3 to realize the grounding function of the grounding device 100. At the same time, compared with the traditional grounding equipment, the structure of the grounding device 100 is simplified and the grounding efficiency of the grounding device 100 is improved.

[0043] According to some embodiments of the present invention, referring to Figure 1-Figure 5 , a countersunk hole 11 is formed on the first connecting member 1, and the second grounding member 3 is a grounding plate 3. The first grounding member 2 includes a first conductive segment 21 and a second conductive segment 22. The first conductive segment 21 stops between the grounding plate 3 and the step portion 111 of the countersunk hole 11. One end of the second conductive segment 22 is connected to the first conductive segment 21, and the second conductive segment 22 is arranged in the countersunk hole 11. Among them, the step portion 111 of the countersunk hole 11 is formed at one end of the first connecting member 1 facing the second grounding member 3, and the cross-sectional area of ​​the first conductive segment 21 is greater than the cross-sectional area of ​​the second conductive segment 22.

[0044] like Figure 1-Figure 5 As shown, the side of the first conductive segment 21 facing the second conductive segment 22 stops against the step portion 111, and the step portion 111 is used to limit and position the first grounding member 2, thereby preventing the first grounding member 2 from excessively moving away from the grounding plate 3. At the same time, the grounding plate 3 stops against the side of the first conductive segment 21 away from the second conductive segment 22, so that the first grounding member 2 is clamped together by the grounding plate 3 and the step portion 111, thereby improving the installation stability of the first grounding member 2, thereby improving the stability of the electrical connection between the first grounding member 2 and the grounding plate 3, and further improving the stability of the grounding function of the grounding device 100.

[0045] Furthermore, if Figure 4 and Figure 5 As shown, the grounding device 100 further includes an elastic member 4, one end of the elastic member 4 abuts against the side of the first conductive segment 21 facing the second conductive segment 22, and the other end of the elastic member 4 abuts against the step portion 111. Such a configuration is conducive to avoiding damage to the first grounding member 2 or the step portion 111, thereby facilitating the improvement of the service life of the first grounding member 2. At the same time, the elastic member 4 is conducive to increasing the applicability of the first grounding member 2. Within the deformation range of the elastic member 4, the first grounding member 2 is suitable for connecting different first connecting members 1 and second grounding members 3, thereby facilitating further reducing the cost of the grounding device 100.

[0046] Optionally, a groove 211 is formed on the first conductive segment 21, and the opening of the groove 211 faces the second conductive segment 22. The above-mentioned one end of the elastic member 4 is fitted in the groove 211, and the above-mentioned one end of the elastic member 4 abuts against the bottom wall of the groove 211, and the above-mentioned other end of the elastic member 4 extends toward the direction of the second conductive segment 22. Thus, the matching stability between the elastic member 4 and the first grounding member 2 is increased.

[0047] According to some embodiments of the present invention, Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a first through hole 31 is formed on the ground plate 3. The first connector 1 includes a first connecting portion 12 and a second connecting portion 13. The second connecting portion 13 is arranged in a first direction (for example, Figure 1 The second connection portion 13 and the first grounding member 2 are spaced apart from each other, the second connection portion 13 passes through the first through hole 31, and the second direction is perpendicular to the first direction. For example, the second connection portion 13 and the first grounding member 2 are spaced apart from each other along the second direction (for example, Figure 2 in the left and right directions).

[0048] That is to say, in the first direction, the height of the second connection part 13 is greater than the height of the first connection part 12, and the size of the first through hole 31 is adapted to the size of one end of the second connection part 13 facing the second grounding member 3. After the end of the second connection part 13 facing the grounding plate 3 passes through the first through hole 31 on the grounding plate 3, the grounding plate 3 can stop on the first connection part 12, so that the grounding plate 3 and the first grounding member 2 stop and achieve electrical connection. Therefore, while ensuring the grounding of the grounding device 100, the connection stability between the grounding plate 3 and the first connection member 1 is increased, thereby improving the electrical connection stability between the grounding plate 3 and the first grounding member 2, and limiting the position of the grounding plate 3 on the first connection member 1, preventing the grounding plate 3 from continuing to move toward the first connection part 12, thereby improving the installation stability of the grounding device 100.

[0049] Further, refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The first connecting member 1 further comprises at least one lug 14 and at least one first fastener 15. In the description of the present utility model, "multiple" means two or more. The lug 14 is arranged on the second connecting portion 13. The first fastener 15 is arranged corresponding to the lug 14, and each first fastener 15 passes through the lug 14 and is connected to the grounding plate 3.

[0050] like Figure 1 and Figure 2As shown, two lugs 14 are provided on the first connecting member 1, and the two lugs 14 are symmetrically arranged on the second connecting portion 13 in the third direction (for example, Figure 2 On both sides of the front-to-back direction in the middle, the two lugs 14 are connected to the grounding plate 3 through two first fasteners 15, thereby improving the connection stability between the grounding plate 3 and the first connecting member 1.

[0051] According to some other embodiments of the present invention, the second grounding member 3 is a grounding wire, which has good conductivity and high flexibility, thereby facilitating the arrangement of the second grounding member 3 and making the grounding device 100 more applicable.

[0052] The battery box 200 according to the embodiment of the second aspect of the utility model comprises a box body 201, a battery module 202 and a grounding device 100. The box body 201 has a receiving cavity 2011, and the box body 201 is a conductive member. The battery module 202 is arranged in the receiving cavity 2011. The grounding device 100 is the grounding device 100 according to the embodiment of the first aspect of the utility model, the first connecting member 1 of the grounding device 100 is arranged on the box body 201, the first connecting member 1 is electrically connected to the battery module 202, and the second grounding member 3 of the grounding device 100 is electrically connected to the box body 201.

[0053] The housing 201 is suitable for installing the battery module 202 in the accommodating cavity 2011 of the box 201, so as to protect the battery module 202 with the box 201, thereby increasing the safety and stability of the battery module 202. The grounding protection of the battery box 200 is achieved by the cooperation between the grounding device 100 and the box 201, thereby meeting the electrical safety requirements of the battery box 200 and improving the safety of the battery box 200.

[0054] According to the battery box 200 of the embodiment of the utility model, the grounding protection of the battery box 200 is achieved by adopting the above-mentioned grounding device 100, so as to meet the electrical safety requirements of the battery box 200 and improve the safety of the battery box 200.

[0055] According to some embodiments of the present invention, referring to Figure 6 , Fig. 9 and Fig.10 , the housing 201 includes a first direction (eg, Figure 6 The top plate 2012 and the bottom plate 2013 are arranged opposite to each other in the vertical direction of the battery box 200, and the grounding device 100 is arranged adjacent to the bottom plate 2013. The battery box 200 also includes a second connecting member 203, which is arranged on the top plate 2012. The second connecting member 203 is provided with a third grounding member 204, and the third grounding member 204 is electrically connected to the first connecting member 1.

[0056] For example, the top plate 2012 is located above the first direction of the box body 201, and the bottom plate 2013 is located below the first direction of the box body 201. The first connector 1 is provided on the bottom plate 2013, and the second connector 203 is provided on the top plate 2012, and the first connector 1 is electrically connected to the third grounding member 204 of the second connector 203. Thus, the conduction of the current between the first connector 1 and the second connector 203 is achieved, the grounding conductivity of the battery box 200 is improved, and the grounding reliability and use safety of the battery box 200 are further improved.

[0057] It should be noted that, when the second grounding member 3 of the grounding device 100 is a grounding plate 3 , the grounding plate 3 may be a part of the bottom plate 2013 ; or the grounding plate 3 may be in contact with the bottom plate 2013 , so as to achieve grounding of the grounding device 100 .

[0058] Further, refer to Figure 8 A second through hole 20121 is formed on the top plate 2012, and part of the second connector 203 passes through the second through hole 20121 to be electrically connected to the first connector 1 of the adjacent battery box 200. The second connector 203 includes a third connector 2031 and a fourth connector 2032. The fourth connector 2032 is disposed on a side of the third connector 2031 adjacent to the first connector 1, and the cross-sectional area of ​​the fourth connector 2032 is smaller than the cross-sectional area of ​​the third connector 2031. The fourth connector 2032 passes through the second through hole 20121 to be electrically connected to the first connector 1.

[0059] The fourth connection portion 2032 is adapted to extend toward the first connection member 1 after passing through the second through hole 20121, thereby facilitating the connection between the second connection member 203 and the first connection member 1. The top plate 2012 abuts against a side surface of the third connection portion 2031 facing the fourth connection portion 2032, thereby increasing the connection stability of the second connection member 203 on the top plate 2012.

[0060] According to some embodiments of the utility model, a third through hole 2033 is formed on the second connecting member 203, and the second fastener 2034 passes through the third through hole 2033 and is connected to the top plate 2012. The second connecting member 203 is formed with a third through hole 2033 at both ends of the second direction, and a second fastener 2034 is provided in each third through hole 2033. The top plate 2012 and the second connecting member 203 are connected by the second fastener 2034, thereby improving the connection stability of the second connecting member 203 on the top plate 2012.

[0061] Optionally, the first fastener 15 and the second fastener 2034 may be bolt assemblies, but are not limited thereto.

[0062] Furthermore, the first connector 1 or the second connector 203 further includes a positive electrode terminal 205 and a negative electrode terminal 206. The positive electrode terminal 205 is connected to the positive electrode of the battery module 202. The negative electrode terminal 206 is connected to the negative electrode of the battery module 202.

[0063] For example, Fig.10 As shown, the second connector 203 includes a positive electrode terminal 205 and a negative electrode terminal 206. The positive electrode of the battery module 202 is connected to the positive electrode terminal 205 of the second connector 203 through the positive electrode harness 207, and the negative electrode of the battery module 202 is connected to the negative electrode terminal 206 of the second connector 203 through the negative electrode harness 208. In this way, the current is transmitted between the battery module 202 and the second connector 203, and the circuit connection in the battery box 200 is made more compact, making full use of the space of the accommodating cavity 2011.

[0064] According to some embodiments of the present invention, the battery box 200 further includes a bracket 209, which is disposed in the accommodating cavity 2011, the bracket 209 is connected to the bottom plate 2013, and the second connecting member 203 is disposed on the bracket 209. Thus, the bracket 209 provides an installation site for the second connecting member 203, thereby improving the installation stability of the grounding device 100 in the battery box 200.

[0065] Reference Figure 6 The energy storage system 300 according to the third aspect of the present invention comprises a plurality of battery boxes 200, wherein the battery boxes 200 are the battery boxes 200 according to the second aspect of the present invention. The plurality of boxes 201 are stacked along a first direction, and two adjacent battery boxes 200 are respectively a first battery box 200 and a second battery box 200, and the first connector 1 or the second connector 203 of the first battery box 200 cooperates with the second connector 203 or the first connector 1 of the second battery box 200.

[0066] That is to say, when the first battery box 200 is located at the top and the second battery box 200 is located at the bottom, the first connector 1 of the first battery box 200 cooperates with the second connector 203 of the second battery box 200; when the second battery box 200 is located at the top and the first battery box 200 is located at the bottom, the first connector 1 of the second battery box 200 cooperates with the second connector 203 of the first battery box 200. This is conducive to achieving circuit conduction between the first battery box 200 and the second battery box 200, and achieving grounding of the energy storage system 300, thereby improving the safety of the energy storage system 300.

[0067] Optionally, the first connector 1 and the second connector 203 can be plugged together, which simplifies the matching method of the first connector 1 and the second connector 203 and facilitates the stacking assembly of multiple battery boxes 200.

[0068] According to the energy storage system 300 of the embodiment of the utility model, by adopting the above-mentioned battery box 200, the installation efficiency of the energy storage system 300 is improved, the grounding function of the energy storage system 300 is ensured, the safety of the energy storage system 300 is improved, and the service life of the energy storage system 300 is extended.

[0069] Other structures and operations of the battery box 200 and the energy storage system 300 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0070] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A grounding device, characterized in that: include: a first connector, the first connector being adapted to be electrically connected to the battery module; a first grounding member, wherein the first grounding member is disposed in the first connecting member; A second grounding member, wherein the second grounding member is electrically connected to the first grounding member and the conductive member respectively.

2. The grounding device according to claim 1, characterized in that: A countersunk hole is formed on the first connecting member, and the second grounding member is a grounding plate; The first grounding member comprises: A first conductive segment, the first conductive segment abuts between the ground plate and the step portion of the countersunk hole; A second conductive segment, one end of which is connected to the first conductive segment, and the second conductive segment is disposed in the countersunk hole.

3. The grounding device according to claim 2, characterized in that: The grounding device also includes: An elastic member, one end of the elastic member abuts against a side of the first conductive segment facing the second conductive segment, and the other end of the elastic member abuts against the step portion.

4. The grounding device according to claim 2 or 3, characterized in that: A first through hole is formed on the ground plate; The first connecting member comprises: a first connecting portion; The second connecting portion is arranged at one side of the first direction of the first connecting portion, the second connecting portion and the first grounding member are arranged at intervals, and the second connecting portion passes through the first through hole.

5. The grounding device according to claim 4, characterized in that: The first connecting member further comprises: at least one lug, the lug being disposed on the second connecting portion; At least one first fastener is disposed corresponding to the lug, and each of the first fasteners passes through the lug and is connected to the second grounding member.

6. The grounding device according to claim 1, characterized in that: The second grounding member is a grounding wire.

7. A battery box, characterized in that: include: A box body, wherein the box body has a containing cavity and the box body is a conductive member; A battery module, wherein the battery module is arranged in the accommodating cavity; A grounding device, wherein the grounding device is a grounding device according to any one of claims 1 to 6, wherein a first connecting member of the grounding device is arranged on the box body, the first connecting member is electrically connected to the battery module, and a second grounding member of the grounding device is electrically connected to the box body.

8. The battery box according to claim 7, characterized in that: The box body comprises a top plate and a bottom plate which are arranged opposite to each other along a first direction, and the grounding device is arranged adjacent to the bottom plate; The battery box also includes: A second connecting member, wherein the second connecting member is arranged on the top plate, a third grounding member is arranged on the second connecting member, and the third grounding member is electrically connected to the first connecting member.

9. The battery box according to claim 8, characterized in that: A second through hole is formed on the top plate, Part of the second connecting member passes through the second through hole to be electrically connected to the first connecting member of the adjacent battery box.

10. The battery box according to claim 8, characterized in that: A third through hole is formed on the second connecting member, and the second fastening member passes through the third through hole and is connected to the top plate.

11. The battery box according to claim 10, characterized in that: The first connecting member or the second connecting member further includes: A positive electrode terminal connected to the positive electrode of the battery module; A negative electrode terminal connected to the negative electrode of the battery module.

12. The battery box according to claim 8, characterized in that: Also includes: A bracket is arranged in the accommodating cavity, the bracket is connected to the bottom plate, and the second connecting member is arranged on the bracket.

13. An energy storage system, characterized in that: include: Multiple battery boxes, wherein the battery boxes are the battery boxes according to any one of claims 7-12, multiple boxes are stacked along a first direction, two adjacent battery boxes are respectively a first battery box and a second battery box, and the first connector or the second connector of the first battery box cooperates with the second connector or the first connector of the second battery box.

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