Battery pack and energy storage equipment

Abstract

The utility model provides a battery pack and energy storage equipment, which belongs to the technical field of energy storage equipment, and comprises a shell, two groups of battery modules and an electric connection assembly, an inner cavity of the shell is sequentially divided into a first containing cavity, a wiring cavity and a second containing cavity in the left-right direction. Wherein one group of battery modules is arranged in the first accommodating cavity, and the other group of battery modules is arranged in the second accommodating cavity; the electric connection assembly is arranged in the wiring cavity; the electric connection assembly is connected with the two battery modules in a one-to-one correspondence manner through the two wire harness groups; and the wire harness group is distributed above the battery module and in the wiring cavity. According to the battery pack provided by the utility model, in the wiring harness group, only a small part of wiring harnesses connected with the battery module are distributed above the battery module, most of the wiring harnesses are positioned in the wiring cavity, the wiring cavity is independently arranged, so that the wiring harnesses in the wiring cavity can be conveniently maintained and operated, potential safety hazards are reduced, the internal layout of the battery pack is reasonable, and the service life of the battery pack is prolonged. And the overall weight of the battery pack is light.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage equipment, and more specifically, relates to a battery pack and energy storage equipment. Background Art

[0002] The battery pack can be used in conjunction with energy storage devices to charge electrical equipment or supply power to places where electricity is used. The battery pack consists of a shell, a battery module, and a wiring harness. The wiring harness serves as a transmission carrier for the battery pack signal and current, connecting the various parts of the battery pack together. In the prior art, in order to increase the energy density of the battery pack, the distance between the wiring harness and the shell is too small. After the shell is closed, it is not easy to maintain the wiring harness, and the inside of the shell may interfere with the wiring harness, causing accidents such as circuit short circuits and fires, resulting in poor safety of the battery pack. Utility Model Content

[0003] The utility model aims to provide a battery pack and energy storage device, aiming to solve the technical problems existing in the prior art that the wiring harness is difficult to maintain and the battery pack has poor safety performance.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a battery pack, including:

[0005] The inner cavity of the shell is divided into a first accommodating cavity, a wiring cavity and a second accommodating cavity in sequence along the left-right direction;

[0006] Two groups of battery modules; one group of battery modules is arranged in the first accommodating cavity, and the other group of battery modules is arranged in the second accommodating cavity; and

[0007] An electrical connection component is arranged in the wiring cavity; the electrical connection component is connected to the two groups of battery modules in a one-to-one correspondence through two groups of wiring harnesses; the wiring harnesses are distributed above the battery modules and in the wiring cavity.

[0008] In a possible implementation, the battery module includes a plurality of battery modules, and the plurality of battery modules are arranged side by side in a front-to-back direction; the wiring harness group includes a first main line, a second main line and a plurality of branch lines;

[0009] Wherein, each two adjacent battery modules are connected via one branch line; the branch line is located above the two battery modules;

[0010] One end of the first main line is connected to the battery module located at the rear end, and the other end of the first main line extends forward to the front of the battery module, then passes backward in the wiring cavity, and is connected to the electrical connection component;

[0011] One end of the second main line is connected to the battery module located at the front end, and the other end of the second main line extends forward to the front of the battery module, then passes backward in the wiring cavity, and is connected to the electrical connection component.

[0012] In some embodiments, the electrical connection assembly includes:

[0013] Two connectors are arranged in the wiring cavity, corresponding to the two battery modules one by one, and close to the front ends of the corresponding battery modules;

[0014] A bus bar is arranged in the wiring cavity and is located behind the two connectors;

[0015] a switch structure, which is disposed on the rear side plate of the housing and is partially located in the wiring cavity; and

[0016] A quick plug, arranged on the rear side plate of the housing and partially located in the wiring cavity;

[0017] Among them, the first bus line is connected to the corresponding connector and the switch structure in sequence; the second bus line is connected to the corresponding connector and the bus in sequence, and then branches to connect the switch structure and the quick plug.

[0018] In some embodiments, a first insulating plate is provided above the battery module corresponding to the plurality of branch lines, and a second insulating plate is provided above the switch structure and the quick plug.

[0019] In a possible implementation, the battery module is connected to a bracket, a front end of the bracket is connected to the front side plate of the shell and / or the top plate of the shell, and a rear end of the bracket is connected to the rear side plate of the shell and / or the top plate of the shell.

[0020] In some embodiments, the support comprises:

[0021] A support cover body, which is arranged below the battery module; and

[0022] The fixing plate is arranged on the top surface of the battery module, and the front end is connected to the front end of the supporting cover body, and the rear end is connected to the rear end of the supporting cover body.

[0023] In a possible implementation, the inner cavity of the shell is provided with two groups of partition plates, and the two groups of partition plates divide the inner cavity of the shell into the first accommodating cavity, the wiring cavity and the second accommodating cavity; and a plurality of heat dissipation holes are provided on the partition plates.

[0024] In a possible implementation, the bottom wall of the first accommodating cavity and the bottom wall of the second accommodating cavity are both provided with support beams, and the battery module is placed on the support beams.

[0025] In a possible implementation, baffle plates are provided on the front side plate, the left side plate and the right side plate of the shell, and the baffle plates are located on the periphery of the battery module; a crossbeam is also provided between the top surface of the left side plate of the shell and the top surface of the right side plate of the shell, and the crossbeam is located above the battery module.

[0026] The beneficial effect of the battery pack provided by the utility model is that compared with the prior art, in the battery pack of the utility model, the inner cavity of the shell is divided into a first accommodating cavity, a wiring cavity and a second accommodating cavity, the two battery modules are respectively arranged in the first accommodating cavity and the second accommodating cavity, and the electrical connection component is arranged in the wiring cavity, so that in the wiring harness group, only a small part of the wiring harness connecting the battery module is distributed above the battery module, and most of the wiring harness is located in the wiring cavity. The wiring cavity is independently arranged, which is convenient for maintenance operations on the wiring harness in the wiring cavity, reducing safety hazards, and the internal layout of the battery pack is reasonable, so that the overall weight of the battery pack is small.

[0027] The utility model also provides an energy storage device, comprising the above-mentioned battery pack.

[0028] The energy storage device provided by the utility model can simplify the wiring harness layout of the battery pack due to the adoption of the above-mentioned battery pack, and is easy to maintain the battery pack. The internal layout of the battery pack is reasonable, and the overall weight of the battery pack is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a battery pack provided by an embodiment of the utility model (the top plate of the shell is not shown in the figure);

[0031] Figure 2 A schematic diagram of the position structure of the battery module, wiring harness assembly, and electrical connection assembly of the battery pack provided in an embodiment of the utility model (the fixing plate is not shown in the figure);

[0032] Figure 3 A schematic structural diagram of a battery pack housing provided by an embodiment of the present utility model (the top plate of the housing is not shown in the figure);

[0033] Figure 4 A schematic diagram of the structure of a battery module of a battery pack provided in an embodiment of the utility model.

[0034] In the figure: 1. Shell; 11. First accommodating cavity; 12. Second accommodating cavity; 13. Wiring cavity; 14. First insulating plate; 15. Second insulating plate; 16. Partition plate; 161. Heat dissipation hole; 17. Support beam; 18. Baffle plate; 19. Crossbeam; 2. Battery module; 21. Battery module; 22. Bracket; 221. Support cover; 222. Fixing plate; 3. Electrical connection assembly; 31. Connector; 32. Bus; 33. Switch structure; 34. Quick plug; 4. Wiring harness group; 41. First main line; 42. Second main line; 43. Branch line. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] It should be noted that the directions or positional relationships indicated by “front”, “rear”, “inside”, “outside”, “up” and “down” in the present embodiment are based on the direction of the battery pack after installation, wherein the front of the battery pack represents the “front”, the back represents the “rear”, the top surface represents the “up”, and the bottom surface represents the “down”, “inside” refers to the side facing the inside of the battery pack in the left-right direction, and “outside” refers to the side facing the outside of the battery pack in the left-right direction.

[0037] In addition, the front-to-back direction defined in the embodiments of the present invention refers to the spacing direction between the front and back sides of the battery pack, the left-to-right direction defined refers to the spacing direction between the two side surfaces of the battery pack, and the up-and-down direction defined refers to the spacing direction between the top and bottom surfaces of the battery pack.

[0038] Please also read Figures 1 to 3 , the battery pack provided by the utility model is now described. The battery pack includes a shell 1, two groups of battery modules 2 and an electrical connection assembly 3. The inner cavity of the shell 1 is divided into a first accommodating cavity 11, a wiring cavity 13 and a second accommodating cavity 12 in the left-right direction; one group of battery modules 2 is arranged in the first accommodating cavity 11, and the other group of battery modules 2 is arranged in the second accommodating cavity 12; the electrical connection assembly 3 is arranged in the wiring cavity 13; the electrical connection assembly 3 is connected to the two groups of battery modules 2 in a one-to-one correspondence through two groups of wiring harness groups 4; the wiring harness groups 4 are distributed above the battery modules 2 and in the wiring cavity 13.

[0039] The outer shape of the shell 1 is generally a hexahedral structure, which is composed of six plates spliced ​​together, or an integrated welded structure. Specifically, the shell 1 includes a top plate, a bottom plate, a left plate, a right plate, a front side plate and a rear side plate. The battery pack is a high-heat device. In addition to liquid cooling, the battery module 2 can also be ventilated to dissipate heat, so that one of the side plates of the shell 1 is provided with an air inlet, and the through direction of the air inlet, that is, the air inlet direction is defined as the front and rear direction. The side plate with the air inlet is the front side plate of the shell 1. It should be noted that the left and right directions defined above are directions that are perpendicular to the front and rear directions and are in the same horizontal plane. A control panel and control elements can also be provided on the front side plate. An air outlet can be provided on the rear side plate or the left and right side plates of the shell 1.

[0040] The two battery modules 2 have the same structure. One battery module 2 is arranged in the first accommodation cavity 11, and the other battery module 2 is arranged in the second accommodation cavity 12. The electrical connection assembly 3 is arranged in the wiring cavity 13, that is, the two battery modules 2 are separated by the wiring cavity 13, and the distance between the two is large. On the one hand, the heat dissipation space of the battery module 2 is increased, and the ventilation and heat dissipation efficiency of the battery module 2 is improved. On the other hand, the installation space of the electrical connection assembly 3 is also increased. Most of the wiring harnesses of the wiring harness group 4 are located in the wiring cavity 13.

[0041] In order to optimize the internal space of the housing 1 , preferably, the battery module 2 substantially fills the first accommodating cavity 11 / the second accommodating cavity 12 , and a preset safety spacing only needs to exist between the battery module 2 and the cavity wall of the first accommodating cavity 11 / the second accommodating cavity 12 .

[0042] Compared with the prior art, the battery pack provided by the utility model has an inner cavity of a shell 1 divided into a first accommodating cavity 11, a wiring cavity 13 and a second accommodating cavity 12. The two battery modules 2 are respectively arranged in the first accommodating cavity 11 and the second accommodating cavity 12, and the electrical connection component 3 is arranged in the wiring cavity 13, so that in the wiring harness group 4, only a small part of the wiring harness connecting the battery module 2 is distributed above the battery module 2, and most of the wiring harness is located in the wiring cavity 13. The wiring cavity 13 is independently arranged, which is convenient for maintenance operations on the wiring harness in the wiring cavity 13 and reduces safety hazards. In addition, the internal layout of the battery pack is reasonable, so that the overall weight of the battery pack is small.

[0043] In some embodiments, the wiring harness group 4 and the battery module 2 can be used as follows: Figure 2 and Figure 4 The structure shown, see Figure 2 and Figure 4 The battery module 2 includes a plurality of battery modules 21 , and the plurality of battery modules 21 are arranged side by side along the front-to-back direction. The wiring harness group 4 includes a first main line 41 , a second main line 42 and a plurality of branch lines 43 .

[0044] Each of the two adjacent battery modules 21 is connected via a branch line 43; the branch line 43 is located above the two battery modules 21. One end of the first main line 41 is connected to the battery module 21 located at the rear end, and the other end of the first main line 41 extends forward to the front of the battery module 2, and then passes through the wiring cavity 13 backward, and is connected to the electrical connection component 3. One end of the second main line 42 is connected to the battery module 21 located at the front end, and the other end of the second main line 42 extends forward to the front of the battery module 2, and then passes through the wiring cavity 13 backward, and is connected to the electrical connection component 3.

[0045] Each battery module 21 is provided with a positive terminal and a negative terminal, and in each two adjacent battery modules 21, the positive terminal of one battery module 21 is connected to the negative terminal of the other battery module 21 via a branch line 43. Multiple branch lines 43 connect multiple battery modules 21 in series.

[0046] In order to optimize the length and path of the branch line 43, the branch line 43 only needs to be located above the adjacent positive and negative terminals. It should be noted that the branch line 43 can be a wiring harness structure, such as Figure 2 The U-shaped wiring harness structure can also be an electrical connecting piece.

[0047] The first bus line 41 and the second bus line 42 are used to connect the battery module 2 to the electrical connection assembly 3 to form a closed loop. In the first bus line 41, only a small portion extending from the back to the front connected to the rear battery module 21 is located above the battery module 2, and most of the rest is located in the wiring cavity 13; in the second bus line 42, only a small portion connected to the front battery module 21 is located in front of the battery module 2, and most of the rest is located in the wiring cavity 13.

[0048] It should be noted that the small portion of the first bus line 41 located above the battery module 2 can be just one wiring harness, and the majority located in the wiring cavity 13 can be branched into multiple wiring harnesses. The same form applies to the second bus line 42.

[0049] In some embodiments, the electrical connection assembly 3 may be configured as follows: Figure 2 The structure shown, see Figure 2 The electrical connection assembly 3 includes two connectors 31, a bus bar 32, a switch structure 33 and a quick plug 34. The two connectors 31 are arranged in the wiring cavity 13, corresponding to the two battery modules 2 one by one, and close to the front end of the corresponding battery module 2; the bus bar 32 is arranged in the wiring cavity 13 and is located behind the two connectors 31; the switch structure 33 is arranged on the rear side plate of the housing 1 and is partially located in the wiring cavity 13; the quick plug 34 is arranged on the rear side plate of the housing 1 and is partially located in the wiring cavity 13.

[0050] The first bus line 41 sequentially connects the corresponding connector 31 and the switch structure 33 ; the second bus line 42 sequentially connects the corresponding connector 31 and the bus bar 32 , and then branches to connect the switch structure 33 and the quick plug 34 .

[0051] It should be noted that one end of one of the first bus lines 41 is connected to the negative terminal of the corresponding rear-end battery module 21, one end of the other first bus line 41 is connected to the positive terminal of the corresponding rear-end battery module 21, and the other ends of the two first bus lines 41 are both connected to the switch structure 33, so that the two battery modules 2 are connected in series.

[0052] The connector 31 can be regarded as an external connection connector of the battery module 2, which plays the role of fixing the first bus line 41 and the second bus line 42, and branching the second bus line 42. The bus bar 32 is used to form a plurality of branches of the second bus line 42, so as to respectively connect the switch structure 33 and the quick plug 34. The switch structure 33 is used to control the on and off of the battery pack. The quick plug 34 is used for quick plug connection with external electrical equipment.

[0053] See also Figure 3 In some embodiments, a first insulating plate 14 is disposed above the battery module 2 corresponding to the plurality of branch lines 43 , and a second insulating plate 15 is disposed above the switch structure 33 and the quick plug 34 .

[0054] The first insulating plate 14 is used to separate multiple branch lines 43 from the top plate of the shell 1 to prevent the battery module 2 and multiple branch lines 43 from contacting the top surface of the shell 1 and causing a short circuit; the second insulating plate 15 is used to separate the switch structure 33 from the top plate of the shell 1 and the quick plug 34 from the top plate of the shell 1 to prevent the switch structure 33, the quick plug 34, the first main line 41, and the second main line 42 from contacting the top plate and causing a short circuit.

[0055] Preferably, the first insulating plate 14 and the second insulating plate 15 are fixed on the top plate of the housing 1 .

[0056] In some embodiments, the battery module 2 may also be configured as follows: Figure 2 and Figure 4 The structure shown, see Figure 2 and Figure 4 The battery module 2 is connected to a bracket 22, the front end of the bracket 22 is connected to the front side plate of the shell 1 and / or the top plate of the shell 1, and the rear end of the bracket 22 is connected to the rear side plate of the shell 1 and / or the top plate of the shell 1.

[0057] The bracket 22 can be regarded as a part of the battery module 2, which is used to integrate the multiple battery modules 21 into one body and is connected to the housing 1. It should be noted that the bracket 22 is an insulator as a whole.

[0058] Preferably, see Figure 4 The bracket 22 includes a support cover 221 and a fixing plate 222; the support cover 221 is covered under the battery module 2; the fixing plate 222 is arranged on the top surface of the battery module 2, and the front end is connected to the front end of the support cover 221, and the rear end is connected to the rear end of the support cover 221.

[0059] The support cover 221 itself forms a semi-enclosed inner cavity, and the cavity opening faces upward. Multiple battery modules 21 are integrated in the semi-enclosed inner cavity of the support cover 221. The front side of the support cover 221 completely covers the front side of the battery module 21 at the front end, and the rear side of the support cover 221 completely covers the rear side of the battery module 21 at the rear end.

[0060] The fixing plate 222 is used to connect the front side and the rear side of the support cover 221, and to connect with the housing 1. In addition, the first bus line 41 can also be arranged with the help of the fixing plate 222, that is, the first bus line 41 is arranged with the part above the battery module 2 in contact with the fixing plate 222.

[0061] In some embodiments, the housing 1 may be Figure 3 The structure, see Figure 3 The inner cavity of the housing 1 is provided with two groups of partition plates 16, preferably, the partition plates 16 are insulating plates. The two groups of partition plates 16 are parallel and spaced apart in the left-right direction, and the plate surface of the partition plates 16 is perpendicular to the left-right direction. The two groups of partition plates 16 divide the inner cavity of the housing 1 into a first accommodating cavity 11, a wiring cavity 13 and a second accommodating cavity 12.

[0062] The volume of the first accommodating cavity 11 is the same as that of the second accommodating cavity 12 , and is larger than the volume of the wiring cavity 13 .

[0063] The partition plate 16 is provided with a plurality of heat dissipation holes 161. The plurality of heat dissipation holes 161 can connect the first accommodation chamber 11, the second accommodation chamber 12 and the wiring chamber 13, so that the heat in the wiring chamber 13 can be dissipated through the air outlets on the left and right side panels of the housing 1.

[0064] See also Figure 3 In some embodiments, the bottom wall of the first accommodating cavity 11 and the bottom wall of the second accommodating cavity 12 are both provided with support beams 17, and the battery module 2 is placed on the support beams 17. The support beams 17 are used to elevate the battery module 2 so that there is a heat dissipation space below the battery module 2, and the battery module 2 is kept at a preset distance from the bottom plate of the housing 1.

[0065] In addition, the front side plate, the left side plate and the right side plate of the housing 1 are all provided with baffles 18, and the baffles 18 are located at the periphery of the battery module 2; the baffles 18 are used to separate the battery module 2 from the housing 1, so that there is a preset distance between the battery module 2 and the housing 1 to ensure safety performance. Preferably, the baffles 18 abut against the bracket 22 of the battery module 2.

[0066] Furthermore, a crossbeam 19 is provided between the top surface of the left side plate of the housing 1 and the top surface of the right side plate of the housing 1. Preferably, a plurality of crossbeams 19 are provided in parallel and spaced apart along the front-to-back direction. The crossbeam 19 is located above the battery module 2. The crossbeam 19 is used to increase the overall strength of the housing 1 and prevent the housing 1 from torsional deformation.

[0067] Based on the same inventive concept, an embodiment of the present application also provides an energy storage device, including the above-mentioned battery pack.

[0068] The energy storage device provided by the utility model can simplify the wiring harness layout of the battery pack due to the adoption of the above-mentioned battery pack, and is easy to maintain the battery pack. The internal layout of the battery pack is reasonable, and the overall weight of the battery pack is small.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: include: A housing (1); the inner cavity of the housing (1) is divided into a first accommodating cavity (11), a wiring cavity (13) and a second accommodating cavity (12) in sequence along the left-right direction; Two groups of battery modules (2); one group of the battery modules (2) is arranged in the first accommodating cavity (11), and the other group of the battery modules (2) is arranged in the second accommodating cavity (12); and An electrical connection component (3) is arranged in the wiring cavity (13); the electrical connection component (3) is connected to the two groups of battery modules (2) in a one-to-one correspondence via two groups of wiring harness groups (4); the wiring harness groups (4) are distributed above the battery modules (2) and in the wiring cavity (13).

2. The battery pack according to claim 1, characterized in that: The battery module (2) comprises a plurality of battery modules (21), and the plurality of battery modules (21) are arranged side by side in a front-to-rear direction; the wiring harness group (4) comprises a first main line (41), a second main line (42) and a plurality of branch lines (43); Wherein, each two adjacent battery modules (21) are connected via a branch line (43); the branch line (43) is located above the two battery modules (21); One end of the first main line (41) is connected to the battery module (21) located at the rear end, and the other end of the first main line (41) extends forward to the front of the battery module (2), then passes backward in the wiring cavity (13), and is connected to the electrical connection component (3); One end of the second main line (42) is connected to the battery module (21) located at the front end, and the other end of the second main line (42) extends forward to the front of the battery module (2), then passes backward in the wiring cavity (13), and is connected to the electrical connection component (3).

3. The battery pack according to claim 2, characterized in that: The electrical connection assembly (3) comprises: Two connectors (31) are arranged in the wiring cavity (13), corresponding to the two battery modules (2) one by one, and close to the front ends of the corresponding battery modules (2); A bus bar (32) is arranged in the wiring cavity (13) and is located behind the two connectors (31); A switch structure (33) is arranged on the rear side plate of the housing (1) and is partially located in the wiring cavity (13); and A quick plug (34) is arranged on the rear side plate of the housing (1) and is partially located in the wiring cavity (13); The first main line (41) is sequentially connected to the corresponding connector (31) and the switch structure (33); the second main line (42) is sequentially connected to the corresponding connector (31) and the bus bar (32), and then branches to connect the switch structure (33) and the quick plug (34).

4. The battery pack according to claim 3, characterized in that: A first insulating plate (14) is provided above the battery module (2) corresponding to the plurality of branch lines (43), and a second insulating plate (15) is provided above the switch structure (33) and the quick plug (34).

5. The battery pack according to claim 1, wherein: The battery module (2) is connected to a bracket (22), the front end of the bracket (22) is connected to the front side plate of the shell (1) and / or the top plate of the shell (1), and the rear end of the bracket (22) is connected to the rear side plate of the shell (1) and / or the top plate of the shell (1).

6. The battery pack according to claim 5, characterized in that: The support (22) comprises: A support cover (221) is disposed below the battery module (2); and A fixing plate (222) is arranged on the top surface of the battery module (2), with a front end connected to the front end of the support cover (221) and a rear end connected to the rear end of the support cover (221).

7. The battery pack according to claim 1, characterized in that: The inner cavity of the shell (1) is provided with two groups of partition plates (16), and the two groups of partition plates (16) divide the inner cavity of the shell (1) into the first accommodating cavity (11), the wiring cavity (13) and the second accommodating cavity (12); and the partition plates (16) are provided with a plurality of heat dissipation holes (161).

8. The battery pack according to claim 1, wherein: The bottom wall of the first accommodating cavity (11) and the bottom wall of the second accommodating cavity (12) are both provided with support beams (17), and the battery module (2) is placed on the support beams (17).

9. The battery pack according to claim 1, characterized in that: The front side plate, the left side plate and the right side plate of the shell (1) are all provided with baffle plates (18), and the baffle plates (18) are located on the periphery of the battery module (2); a crossbeam (19) is also provided between the top surface of the left side plate of the shell (1) and the top surface of the right side plate of the shell (1), and the crossbeam (19) is located above the battery module (2).

10. An energy storage device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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