Energy storage device

Abstract

According to the energy storage device provided by the invention, the battery module in the energy storage device can be limited, and the battery module is prevented from moving in the shell, so that the risk of short circuit of the battery module can be reduced, and the safety performance of the energy storage device is improved. The energy storage device comprises a shell and a battery module, the shell is provided with a containing cavity, a first assembling body is arranged on the cavity side wall of the containing cavity and located in the containing cavity, a first inserting part is arranged on the side, away from the cavity bottom wall, of the first assembling body, and the battery module is located in the containing cavity and comprises a battery pack and a first end plate; the first end plate is located on the side, facing the cavity side wall, of the battery pack and abuts against the battery pack, a second assembly body is arranged on the side, deviating from the battery pack, of the first end plate, the second assembly body is located on the side, deviating from the cavity bottom wall, of the first assembly body in the height direction of the energy storage device and is opposite to the first assembly body, and the second assembly body is provided with a second inserting part; and the second inserting part and the first inserting part are mutually inserted.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly relates to an energy storage device. Background Art

[0002] An energy storage device is an energy storage component that provides power for electrical equipment and is one of the important components of electrical equipment. During the transportation and use of the energy storage device, the battery module is prone to move within the housing and collide with the inner wall of the housing, resulting in the battery module being prone to short circuit, reducing the safety of the energy storage device. Summary of the Utility Model

[0003] This application provides an energy storage device that can limit the battery module installed in the housing of the energy storage device to prevent the battery module from moving within the housing, thereby reducing the risk of short circuit of the battery module and improving the safety performance of the energy storage device.

[0004] This application provides an energy storage device, including a housing and a battery module. The housing is provided with a receiving cavity, the receiving cavity includes a cavity bottom wall and a cavity side wall, the cavity side wall is fixedly connected to the cavity bottom wall and is disposed around the circumference of the cavity bottom wall. A first assembly body is provided on the cavity side wall and is located within the receiving cavity. A first insertion portion is provided on a side of the first assembly body facing away from the cavity bottom wall. The battery module is located within the receiving cavity. The battery module includes a battery pack and a first end plate. The first end plate is located on a side of the battery pack facing the cavity side wall and abuts against the battery pack. A second assembly body is provided on a side of the first end plate facing away from the battery pack. In the height direction of the energy storage device, the second assembly body is located on a side of the first assembly body facing away from the cavity bottom wall and is disposed opposite to the first assembly body. The second assembly body is provided with a second insertion portion, and the second insertion portion is inserted into the first insertion portion.

[0005] Wherein, the first assembly body is further provided with a first fastening hole. The opening of the first fastening hole is located on a surface of the first assembly body facing away from the cavity bottom wall. The first fastening hole is spaced from the first insertion portion. The second assembly body is further provided with a second fastening hole. The second fastening hole penetrates through the second assembly body in the thickness direction of the second assembly body, is spaced from the second insertion portion, and is communicated with the first fastening hole. The energy storage device is further provided with a fastener. The fastener passes through the first fastening hole and the second fastening hole and is fixed to both the first assembly body and the second assembly body.

[0006] Wherein, the first plug-in part is a plug-in hole, the opening of the plug-in hole is located on the surface of the first assembly facing away from the cavity bottom wall, and the second plug-in part penetrates through the plug-in hole; alternatively, the second plug-in part is a plug-in hole, the plug-in hole penetrates through the second assembly along the thickness direction of the second assembly, and the first plug-in part penetrates through the plug-in hole.

[0007] Wherein, a third assembly is further provided on the cavity side wall. Along the length direction of the energy storage device, the third assembly is spaced apart from and opposite to the first assembly. A third plug-in part is provided on the side of the third assembly facing away from the cavity bottom wall; the battery module further includes a second end plate. Along the length direction of the energy storage device, the second end plate and the first end plate are arranged back to back, and are respectively located on opposite sides of the battery pack and are both in contact with the battery pack. A fourth assembly is provided on the side of the second end plate facing away from the battery pack. Along the height direction of the energy storage device, the fourth assembly is located on the side of the third assembly facing away from the cavity bottom wall and is opposite to the third assembly. The fourth assembly is provided with a fourth plug-in part, and the fourth plug-in part is plugged with the third plug-in part.

[0008] Wherein, there are multiple first assemblies, and the first assemblies are spaced apart along the width direction of the energy storage device; there are multiple third assemblies, and the third assemblies are spaced apart along the width direction of the energy storage device. Along the length direction of the energy storage device, each third assembly is spaced apart from and opposite to a first assembly; there are multiple battery modules, and the multiple battery modules are arranged at intervals along the width direction of the energy storage device. Along the height direction of the energy storage device, the second assembly of each battery module is opposite to a first assembly, and the second plug-in part of each second assembly is plugged and fixed with the first plug-in part of a first assembly. Along the height direction of the energy storage device, the fourth assembly of each battery module is opposite to a third assembly, and the fourth plug-in part of each fourth assembly is plugged with the third plug-in part of a third assembly.

[0009] Wherein, the multiple battery modules include a first battery module and a second battery module. Along the width direction of the energy storage device, the battery poles of the battery pack in the first battery module are opposite to the battery poles of the battery pack in the second battery module.

[0010] Wherein, a limiting body is provided on the cavity bottom wall, and the limiting body is located in the receiving cavity and between the first battery module and the second battery module.

[0011] In which, the first battery module includes a first insulating sheet, which is located on one side of the battery pack of the first battery module in the width direction, and is installed between the first end plate and the second end plate of the first battery module, and covers the pole of the battery pack of the first battery module; the second battery module includes a second insulating sheet, which is located on one side of the battery pack of the second battery module in the width direction, and is installed between the first end plate and the second end plate of the second battery module, and covers the pole of the battery pack of the second battery module. Along the width direction of the energy storage device, the second insulating sheet and the first insulating sheet are spaced and arranged opposite to each other.

[0012] Wherein, along the height direction of the energy storage device, the first insulating sheet and the second insulating sheet are both located on a side of the limiting body away from the cavity bottom wall.

[0013] In which, a first hook is further provided on the side of the first end plate facing away from the battery pack. Along the height direction of the energy storage device, the first hook is located on the side of the second plug-in portion facing away from the first plug-in portion, and is spaced apart from the second plug-in portion; a second hook is further provided on the side of the second end plate facing away from the battery pack. Along the height direction of the energy storage device, the second hook is located on the side of the fourth plug-in portion facing away from the third plug-in portion, and is spaced apart from the third plug-in portion. Along the width direction of the energy storage device, the second hook is arranged opposite to the first hook.

[0014] In the energy storage device provided in the present application, a first plug-in portion is provided on the cavity side wall of the shell, and a second plug-in portion is provided on the end plate of the battery module, and the first plug-in portion and the second plug-in portion are plugged into each other, so as to limit the position of the battery module installed in the shell, avoid collision between the battery module and the inner wall of the shell, thereby reducing the risk of short circuit in the battery module, improving the safety performance of the energy storage device, and ensuring better reliability of the use of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0016] Figure 1 is a schematic structural diagram of the energy storage device provided in an embodiment of the present application;

[0017] Figure 2 yes Figure 1 A partial structural schematic diagram of the energy storage device shown;

[0018] Figure 3 yes Figure 1 A schematic diagram of the exploded structure of the energy storage device shown;

[0019] Figure 4 is Figure 3 The structural schematic diagram of the housing assembly of the protective housing in the energy storage device shown;

[0020] Figure 5 is Figure 4 The structural schematic diagram of the housing in the housing assembly shown;

[0021] Figure 6 is Figure 5 The structural schematic diagram of the housing shown from another angle;

[0022] Figure 7 is Figure 6 The sectional structural schematic diagram of the housing shown after being cut along A-A;

[0023] Figure 8 is Figure 3 The structural schematic diagram of the battery module in the energy storage device shown;

[0024] Figure 9 is Figure 8 The exploded structural schematic diagram of the battery module shown;

[0025] Figure 10 is Figure 9 The structural schematic diagram of the battery pack in the battery module shown;

[0026] Figure 11 is Figure 9 The structural schematic diagram of the first end plate in the battery module shown;

[0027] Figure 12 is Figure 9 The structural schematic diagram of the second end plate in the battery module shown;

[0028] Figure 13 is Figure 9 The structural schematic diagram of the first limiting plate and the second limiting plate in the battery module shown;

[0029] Figure 14 is Figure 2 The sectional structural schematic diagram of the energy storage device shown after being cut along B-B;

[0030] Figure 15 is Figure 3 The structural schematic diagram of the cover assembly in the energy storage device shown. Detailed implementation manners

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments of the present application will be described below.

[0032] Please refer to Figures 1 to 3 ,Figure 1 FIG. Figure 1 is a schematic structural diagram of an energy storage device 1000 provided by an embodiment of the present application. Figure 2 is Figure 1 a partial schematic structural diagram of the energy storage device 1000 shown in Figure 3 is Figure 1 a schematic exploded structural diagram of the energy storage device 1000 shown in. For the convenience of description, the length direction of the energy storage device 1000 is defined as the X-axis direction, the width direction of the energy storage device 1000 is defined as the Y-axis direction, and the height direction of the energy storage device 1000 is defined as the Z-axis direction, and the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other in pairs.

[0033] In an embodiment of the present application, the energy storage device 1000 may be a device with a function of storing electric power, such as a connection wire harness or a battery system. Exemplarily, the energy storage device 1000 may be used as a power source for a low-speed vehicle to provide electric power for the low-speed vehicle. In this embodiment, the energy storage device 1000 includes a protective housing 100, a battery module 200, a pressure strip 300, a protection board 400, and two fixing seats 500. Specifically, the battery module 200, the pressure strip 300, the electrical connection piece 212, and the protection board 400 are all located inside the protective housing 100. Among them, the pressure strip 300 is fixedly installed on the top of the battery module 200. The protection board 400 is installed on the side of the pressure strip 300 facing away from the battery module 200. The protection board 400 is assembled with the battery module 200 through the pressure strip 300. In addition, the length direction of the protective housing 100 is parallel to the X-axis direction, the width direction of the protective housing 100 is parallel to the Y-axis direction, and the height direction of the protective housing 100 is parallel to the Z-axis direction.

[0034] Both of the two fixing seats 500 are located outside the protective housing 100 and are both installed at the bottom of the protective housing 100. Exemplarily, both of the two fixing seats 500 are detachably connected to the protective housing 100. Along the length direction of the energy storage device 1000 (the illustrated X-axis direction), the two fixing seats 500 are arranged at intervals. The fixing seat 500 can be used to fix the protective housing 100 so that the energy storage device 1000 can be fixedly installed in an electrical device through the fixing seat 500. In some other embodiments, the bottom of the protective housing 100 of the energy storage device 1000 may not be provided with the fixing seat 500. At this time, the energy storage device 1000 can be directly fixed in the electrical device through the protective housing 100.

[0035] It should be noted that the orientation words such as "outside", "inside", "top", and "bottom" mentioned in the embodiments of the present application when describing the energy storage device 1000 are all based on Figure 1The orientation of the energy storage device 1000 shown is described. The side facing away from the inside of the protective housing 100 is defined as "outer", the side facing towards the inside of the protective housing 100 is defined as "inner", the side facing towards the positive direction of the Z-axis is defined as "top", and the side facing towards the negative direction of the Z-axis is defined as "bottom". It does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0036] Please refer to Figure 4 , Figure 4 is Figure 3 a schematic structural view of the housing assembly 110 of the protective housing 100 in the energy storage device 1000 shown.

[0037] The protective housing 100 includes a housing assembly 110 and a cover assembly 120. The cover assembly 120 covers the top side of the housing assembly 110. In this embodiment, the housing assembly 110 includes a housing 111, a positive terminal 112, a negative terminal 113, a pressure relief valve 114, a switch member 115, and a communication interface 116. Along the length direction of the housing assembly 110 (the X-axis direction shown), the positive terminal 112, the negative terminal 113, the pressure relief valve 114, the switch member 115, and the communication interface 116 are all installed on the same side of the housing 111.

[0038] Please refer to in combination Figure 5 , Figure 6 and Figure 7 , Figure 5 is Figure 4 a schematic structural view of the housing 111 in the housing assembly 110 shown, Figure 6 is Figure 5 a schematic structural view of the housing 111 shown from another angle, Figure 7 is Figure 6 a schematic cross-sectional structural view of the housing 111 shown after being cut along the A-A line. Among them, "being cut along the A-A line" means being cut along the plane where the A-A line is located, and similar descriptions hereinafter can be understood in the same way.

[0039] In this embodiment, the housing 111 is provided with a receiving cavity 10a. The receiving cavity 10a can receive the battery module 200. The receiving cavity 10a includes a cavity bottom wall 101 and a cavity side wall 102. The cavity side wall 102 is fixedly connected to the cavity bottom wall 101 and is arranged around the peripheral side of the cavity bottom wall 101. The housing 111 further includes a bottom case 10 and a side case 20. Specifically, the side case 20 is fixedly connected to the bottom case 10, surrounds the edge of the bottom case 10, and encloses the receiving cavity 10a with the bottom case 10. Among them, the bottom case 10 can serve as the cavity bottom wall 101 of the receiving cavity 10a, and the side case 20 is the cavity side wall 102 of the receiving cavity 10a.

[0040] Specifically, the bottom case 10 is provided with a limiting body 11. That is to say, the limiting body 11 is provided on the bottom wall 101 of the receiving cavity 10a. The limiting body 11 is located inside the receiving cavity 10a and extends along the length direction of the bottom case 10. The limiting body 11 can be used to limit the battery module 200.

[0041] The side case 20 includes a first sub-side plate 21, a second sub-side plate 22, and two third sub-side plates 23. Among them, along the length direction of the housing 111 (the X-axis direction shown in the figure), the first sub-side plate 21 and the second sub-side plate 22 are spaced apart and oppositely arranged. The two third sub-side plates 23 are connected between the first sub-side plate 21 and the second sub-side plate 22. Along the width direction of the housing 111 (the Y-axis direction shown in the figure), the two third sub-side plates 23 are spaced apart and oppositely arranged.

[0042] The side case 20 is further provided with a positive electrode through hole 201, a negative electrode through hole 202, a pressure relief hole 203, an assembly hole 204, and a communication installation hole 205. Specifically, the positive electrode through hole 201, the negative electrode through hole 202, the pressure relief hole 203, the assembly hole 204, and the communication installation hole 205 are all provided on the first sub-side plate 21, and all penetrate the first sub-side plate 21 along the thickness direction of the first sub-side plate 21 (the X-axis direction shown in the figure) and are spaced apart from each other. In this embodiment, the positive electrode through hole 201, the negative electrode through hole 202, the pressure relief hole 203, the assembly hole 204, and the communication installation hole 205 are all close to the opening of the housing 111. Among them, along the Y-axis direction, the assembly hole 204 is located at the middle position of the first sub-side plate 21. The positive electrode through hole 201 and the negative electrode through hole 202 are both provided at the edges of the first sub-side plate 21 and are respectively located on opposite sides of the assembly hole 204. The pressure relief hole 203 is provided between the assembly hole 204 and the positive electrode through hole 201. The communication installation hole 205 is provided between the assembly hole 204 and the negative electrode through hole 202.

[0043] In this embodiment, the side case 20 is further provided with a first assembly body 24 and a third assembly body 25. That is to say, the first assembly body 24 and the third assembly body 25 are provided on the cavity side wall 102 of the housing 111. The first assembly body 24 and the third assembly body 25 are both located inside the receiving cavity 10a. Exemplarily, the first assembly body 24 and the third assembly body 25 are also spaced apart from the limiting body 11. Along the length direction of the energy storage device 1000, the first assembly body 24 and the third assembly body 25 are spaced apart and oppositely arranged. Specifically, the first assembly body 24 is provided on the first sub-side plate 21 of the side case 20, and the third assembly body 25 is provided on the second sub-side plate 22 of the side case 20. When the battery module 200 is installed into the housing 111, both the first assembly body 24 and the third assembly body 25 can be inserted and matched with the battery module 200 to realize the limitation of the battery module 200 inside the housing 111.

[0044] Specifically, the first assembly 24 is provided with a first insertion portion 241. Exemplarily, the first insertion portion 241 is an insertion hole, and the opening of the insertion hole is located on the surface of the first assembly 24 facing away from the cavity bottom wall 101. The insertion hole is recessed from the surface of the first assembly 24 facing away from the cavity bottom wall 101 towards the cavity bottom wall 101. The first assembly 24 is further provided with a first fastening hole 242, and the opening of the first fastening hole 242 is located on the surface of the first assembly 24 facing away from the cavity bottom wall 101. The first fastening hole 242 is recessed from the surface of the first assembly 24 facing away from the cavity bottom wall 101 towards the cavity bottom wall 101. The first fastening hole 242 and the first insertion portion 241 are arranged at intervals. Exemplarily, there are two first fastening holes 242. In the Y-axis direction, the two first fastening holes 242 are respectively arranged on opposite sides of the first insertion portion 241 and are both arranged at intervals with the first insertion portion 241.

[0045] In this embodiment, there may be multiple first assemblies 24. In the width direction of the energy storage device 1000, the multiple first assemblies 24 are arranged at intervals. Exemplarily, a limiting body 11 is arranged between two adjacent first assemblies 24. Each first assembly 24 is provided with a first insertion portion 241 and two first fastening holes 242.

[0046] In this embodiment, the structure of the third assembly 25 is the same as that of the first assembly 24. The third assembly 25 is provided with a third insertion portion 251 and a third fastening hole 252. The positional relationship between the third insertion portion 251 and the third fastening hole 252 in the third assembly 25 can refer to the relevant descriptions of the positional relationship between the first insertion portion 241 and the first fastening hole 242 in the first assembly 24, which will not be elaborated here. In this embodiment, there may be multiple third assemblies 25. In the width direction of the energy storage device 1000, the multiple third assemblies 25 are arranged at intervals. In the length direction of the energy storage device 1000, each third assembly 25 is arranged at intervals and opposite to a first assembly 24. Each third assembly 25 is provided with a third insertion portion 251 and two third fastening holes 252.

[0047] Please refer to again Figure 4 . The positive terminal 112 passes through the positive through hole 201, and the negative terminal 113 passes through the negative through hole 202, so as to facilitate the connection between the energy storage device 1000 and other devices or equipment and supply power to other devices or equipment. The switch member 115 is installed in the assembly hole 204 and is electrically connected to the battery module 200 to realize the startup or shutdown of the energy storage device 1000. The communication interface 116 passes through the communication installation hole 205 to enable the energy storage device 1000 to realize the communication transmission function.

[0048] The pressure relief valve 114 is installed in the pressure relief hole 203. It can be understood that during the use of the energy storage device 1000, a large amount of gas will be generated inside the energy storage device 1000, increasing the pressure inside the energy storage device 1000. When the pressure inside the energy storage device 1000 exceeds the preset value, the pressure relief valve 114 can automatically open to discharge the gas inside the energy storage device 1000, preventing the energy storage device 1000 from exploding.

[0049] In this embodiment, by arranging the positive terminal 112, the negative terminal 113, the pressure relief valve 114, and the communication interface 116 on a first sub-side plate 21 of the side shell 20, and making the positive terminal 112, the negative terminal 113, the pressure relief valve 114, and the communication interface 116 all close to the opening of the housing 111, it is possible to avoid wasting the space in the height direction of the housing 111 and improve the space utilization rate in the height direction of the housing 111.

[0050] Please refer to Figure 8 and Figure 9 , Figure 8 is Figure 3 the schematic structural diagram of the battery module 200 in the energy storage device 1000 shown, Figure 9 is Figure 8 the exploded structural diagram of the battery module 200 shown.

[0051] The battery module 200 includes a battery pack 210, a first end plate 220, a second end plate 260, a first limiting plate 230, a second limiting plate 240, and a wire harness isolation plate 250. Among them, along the X-axis direction, the first end plate 220 and the second end plate 260 are respectively arranged on opposite sides of the battery pack 210, and are arranged back to back with each other, and are both in contact with the battery pack 210 to clamp the battery pack 210 in the length direction of the battery pack 210, so as to ensure the assembly reliability in the length direction of the battery pack 210. Along the Y-axis direction, the first limiting plate 230 and the second limiting plate 240 are both located on one side of the battery pack 210, and the wire harness isolation plate 250 is located on the other side of the battery pack 210 in the Y-axis direction. Among them, along the Z-axis direction, the first limiting plate 230 and the second limiting plate 240 are arranged at intervals.

[0052] Please refer to Figure 10 , Figure 10 is Figure 9 the schematic structural diagram of the battery pack 210 in the battery module 200 shown.

[0053] The battery pack 210 includes a plurality of batteries 211, a plurality of electrical connection pieces 212, and two lead-out pieces 213. Among them, the plurality of batteries 211 are connected in series or in parallel through the plurality of electrical connection pieces 212, and the plurality of batteries 211 also realize the lead-out of the positive and negative poles of the battery pack 210 through the two lead-out pieces 213, which will be specifically described below.

[0054] In this embodiment, along the length direction of the battery module 200 (the X-axis direction shown in the figure), a plurality of batteries 211 are arranged in sequence. Among them, along the Y-axis direction, the positive electrode posts and the negative electrode posts of the plurality of batteries 211 are both located on the same side. Exemplarily, the plurality of batteries 211 can be connected in series. In some other embodiments, the plurality of batteries 211 can also be connected in parallel, or some of the batteries 211 can be connected in series and some of the batteries 211 can be connected in parallel. The embodiments of the present application do not specifically limit the connection manner of the plurality of batteries 211 in the battery pack 210.

[0055] In this embodiment, the plurality of electrical connection pieces 212 and the two lead-out pieces 213 are both made of metal materials. Exemplarily, the plurality of tabs and the two lead-out pieces 213214 are both made of copper metal materials. Among them, the plurality of electrical connection pieces 212 are electrically connected to the plurality of batteries 211. Among them, each electrical connection piece 212 is electrically connected between two adjacent batteries 211. Specifically, one end of each electrical connection piece 212 is electrically connected to the positive electrode post of one battery 211, and the other end is electrically connected to the negative electrode post of another battery 211. In some other embodiments, when the plurality of batteries 211 are connected in parallel, some of the electrical connection pieces 212 are electrically connected between the positive electrode posts of the two batteries 211, and some of the electrical connection pieces 212 are electrically connected between the negative electrode posts of the two batteries 211.

[0056] Each lead-out piece 213 is electrically connected to one battery 211. In this embodiment, the polarities of the two lead-out pieces 213 are opposite. Among them, the polarity of one lead-out piece 213 is positive, and the polarity of the other lead-out piece 213 is negative, so as to realize the lead-out of the positive and negative poles of the battery pack 210.

[0057] Please refer to Figure 11 , Figure 11 which is Figure 9 a schematic structural diagram of the first end plate 220 in the battery module 200 shown.

[0058] The first end plate 220 includes a first body 30 and a second assembly body 40, and the second assembly body 40 is fixedly connected to the first body 30. Specifically, the first body 30 includes a first plate 31, a second plate 32 and a third plate 33. Among them, the first plate 31 abuts against the battery pack 210. The second plate 32 and the third plate 33 are both fixedly connected to the first plate 31. Along the width direction of the first end plate 220 (the Y-axis direction shown in the figure), the second plate 32 and the third plate 33 are spaced apart and arranged opposite to each other.

[0059] In this embodiment, the second plate 32 is provided with a first mounting hole 321 and a second mounting hole 322. Both the first mounting hole 321 and the second mounting hole 322 penetrate through the second plate 32 along the thickness direction of the second plate 32. In the Z-axis direction, the first mounting hole 321 and the second mounting hole 322 are spaced apart. Among them, the first mounting hole 321 is located on the side of the second plate 32 away from the bottom case 10 for mounting the first limiting plate 230, so that the first limiting plate 230 is fixed to the second plate 32 of the first end plate 220. The second mounting hole 322 is located on the side of the second plate 32 close to the bottom case 10 for mounting the second limiting plate 240, so that the third fixing plate is fixed to the second plate 32 of the first end plate 220. In this embodiment, there are two first mounting holes 321 and two second mounting holes 322. In the Z-axis direction, the two first mounting holes 321 are spaced apart, and the two second mounting holes 322 are spaced apart.

[0060] The third plate 33 is provided with a first mating hole 331. The first mating hole 331 penetrates through the third plate 33 along the thickness direction of the third plate 33. In this embodiment, there may be multiple first mating holes 331. In the height direction of the third plate 33 (the Z-axis direction shown in the figure), the multiple first mating holes 331 are spaced apart. Exemplarily, there are two first mating holes 331. The two first mating holes 331 are used to mount the wire harness isolation plate 250 so that the wire harness isolation plate 250 is fixed to the first end plate 220.

[0061] In this embodiment, the second assembly 40 is located on the side of the first body 30 of the first end plate 220 away from the battery pack 210. That is, the second assembly 40 is provided on the side of the first end plate 220 away from the battery pack 210. Specifically, the second assembly 40 is fixedly connected to the first plate 31 of the first body 30 and is spaced apart from both the second plate 32 and the third plate 33. When the battery module 200 is installed in the housing 111, in the height direction of the energy storage device 1000, the second assembly 40 is located on the side of the first assembly 24 away from the cavity bottom wall 101 and is disposed opposite to the first assembly 24, so as to facilitate the cooperation and fixation between the second assembly 40 and the first assembly 24, thereby realizing the assembly between the battery module 200 and the housing 111.

[0062] It can be understood that by disposing the second assembly 40 on the first plate 31 of the first end plate 220, the installation space of the second assembly 40 and the installation space of the first end plate 220 can be reused, thereby reducing the size of the battery module 200 in the length direction. After the battery module 200 is installed in the housing 111, this setting can reduce the gap between the battery module 200 and the side housing 20 of the housing 111, improve the utilization rate of the space between the battery module 200 and the housing 111, and thus reduce the size of the energy storage device 1000 as a whole in the length direction and the width direction, realizing the miniaturized design of the energy storage device 1000, which can not only enhance the user experience but also help reduce the production cost of the energy storage device 1000.

[0063] Specifically, the second assembly 40 includes a first connecting portion 41 and a first mounting portion 42 connected to each other. Among them, the first connecting portion 41 is fixedly connected to the first plate 31. The first mounting portion 42 is fixedly connected to the first connecting portion 41 and extends in a direction away from the first plate 31 along the thickness direction of the first connecting portion 41.

[0064] The second assembly 40 is provided with a second fastening hole 421. The second fastening hole 421 penetrates the second assembly 40 along the thickness direction of the second assembly 40. Specifically, the first mounting portion 42 of the second assembly 40 is provided with the second fastening hole 421, and the second fastening hole 421 penetrates the first mounting portion 42 along the thickness direction of the first mounting portion 42 (the illustrated Z-axis direction) and communicates with the first fastening hole 242 of the first assembly 24. Exemplarily, there are two second fastening holes 421. Along the Y-axis direction, the two second fastening holes 421 are spaced apart. Each second fastening hole 421 communicates with one first fastening hole 242.

[0065] The second assembly 40 is further provided with a second plugging portion 43. When the battery module 200 is installed in the housing 111, the second plugging portion 43 is plugged into the first plugging portion 241 of the first assembly 24. Specifically, the second plugging portion 43 is disposed on the first mounting portion 42, located between the two second fastening holes 421, and is spaced apart from both second fastening holes 421. In this embodiment, the second plugging portion 43 is a sheet-like structure, and the second plugging portion 43 extends in a direction away from the first connecting portion 41 along the thickness direction of the first mounting portion 42. When the battery module 200 is installed in the housing 111, the second plugging portion 43 penetrates through the plugging hole of the first assembly 24.

[0066] In some other embodiments, the second insertion portion 43 may also be an insertion hole, and the insertion hole penetrates through the second assembly 40 along the thickness direction of the second assembly 40. At this time, the first insertion portion 241 may be a sheet-like structure, and the first insertion portion 241 extends away from the bottom case 10 in a direction away from the surface of the first assembly 24 facing away from the bottom case 10. When the battery module 200 is installed into the housing 111, the first insertion portion 241 is inserted into the insertion hole.

[0067] In this embodiment, a first lifting hook 70 is further provided on the side of the first end plate 220 facing away from the battery pack 210. Specifically, the first lifting hook 70 is located on the side of the first plate 31 of the first body 30 facing away from the battery pack 210, and is fixedly connected to the side of the first connecting portion 41 of the second assembly 40 away from the first mounting portion 42. Exemplarily, the first lifting hook 70 may be integrally formed with the first connecting portion 41 of the second assembly 40. Along the height direction of the energy storage device 1000, the first lifting hook 70 is located on the side of the second insertion portion 43 facing away from the first insertion portion 241, and is spaced apart from the second insertion portion 43. The first lifting hook 70 is used to lift the battery module 200 so that the battery module 200 can be smoothly installed into the housing 111.

[0068] Please refer to Figure 12 , Figure 12 is Figure 9 the schematic structural view of the second end plate 260 in the battery module 200 shown.

[0069] In this embodiment, the structure of the second end plate 260 is the same as that of the first end plate 220. The second end plate 260 includes a second body 50 and a fourth assembly 60, and the fourth assembly 60 is fixedly connected to the second body 50. Specifically, the second body 50 includes a fourth plate 51, a fifth plate 52, and a sixth plate 53. The positional relationships of the fourth plate 51, the fifth plate 52, and the sixth plate 53 may all refer to the relevant descriptions of the positional relationships of the first plate 31, the second plate 32, and the third plate 33 in the first body 30 of the first end plate 220 above, and will not be elaborated here.

[0070] The fifth plate 52 is provided with a third mounting hole 521 and a fourth mounting hole 522. The positional relationships of the third mounting hole 521 and the fourth mounting hole 522 in the fifth plate 52 may all refer to the relevant descriptions of the positional relationships of the first mounting hole 321 and the second mounting hole 322 in the second plate 32 above, and will not be elaborated here.

[0071] The sixth plate 53 is provided with a third mating hole 531. The positional relationship of the third mating hole 531 in the sixth plate 53, as well as the number of the third mating holes 531, etc., may all refer to the relevant descriptions of the positional relationship and the number of the first mating holes 331 in the third plate 33 above, and will not be elaborated here.

[0072] In this embodiment, the fourth assembly 60 is located on the side of the second body 50 of the second end plate 260 away from the battery pack 210. That is to say, the fourth assembly 60 is provided on the side of the second end plate 260 away from the battery pack 210. The positional relationship between the fourth assembly 60 and the second body 50 can refer to the relevant description of the positional relationship between the second assembly 40 and the first body 30 above, which will not be elaborated here. When the battery module 200 is installed in the housing 111, in the height direction of the energy storage device 1000, the fourth assembly 60 is located on the side of the third assembly 25 away from the cavity bottom wall 101 and is disposed opposite to the third assembly 25, so as to facilitate the cooperation and fixation between the fourth assembly 60 and the third assembly 25, thereby realizing the assembly between the battery module 200 and the housing 111.

[0073] It can be understood that by arranging the fourth assembly 60 on the fourth plate 51 of the second end plate 260, the installation space of the fourth assembly 60 and the installation space of the second end plate 260 can be reused, thereby reducing the size of the battery module 200 in the length direction. After the battery module 200 is installed in the housing 111, this setting can reduce the gap between the battery module 200 and the side shell 20 of the housing 111, improve the utilization rate of the space between the battery module 200 and the housing 111, thereby reducing the size of the energy storage device 1000 as a whole in the length direction and the width direction, realizing the miniaturized design of the energy storage device 1000, and thus not only improving the user experience but also helping to reduce the production cost of the energy storage device 1000.

[0074] Specifically, the fourth assembly 60 includes a connected second connecting portion 61 and a second mounting portion 62. The positional relationship between the second connecting portion 61 and the second mounting portion 62 in the fourth assembly 60 can refer to the relevant description of the positional relationship between the first connecting portion 41 and the first mounting portion 42 in the second assembly 40 above, which will not be elaborated here.

[0075] The fourth assembly 60 is provided with a fourth fastening hole 621. The position of the fourth fastening hole 621 in the fourth assembly 60, the number of the fourth fastening holes 621, and the positional relationship between the fourth fastening hole 621 and the third fastening hole 252 can refer to the relevant description of the second fastening hole 421 above, which will not be elaborated here.

[0076] The fourth assembly 60 is further provided with a fourth plugging portion 63. When the battery module 200 is installed into the housing 111, the fourth plugging portion 63 is plugged into the third plugging portion 251 of the first assembly 24 to further limit the position of the battery module 200 within the housing 111, and can further prevent the battery module 200 from moving within the housing 111. The structure of the fourth plugging portion 63 and the positional relationship of the fourth plugging portion 63 in the fourth assembly 60 and the like can all refer to the relevant descriptions of the structure of the second plugging portion 43 and the positional relationship of the second plugging portion 43 in the second assembly 40 and the like, and will not be elaborated here.

[0077] In this embodiment, a second lifting hook 80 is further provided on the side of the second end plate 260 facing away from the battery pack 210. Specifically, the second lifting hook 80 is located on the side of the fourth plate 51 of the second body 50 facing away from the battery pack 210, and is fixedly connected to the side of the second connecting portion 61 of the fourth assembly 60 away from the second mounting portion 62. In the height direction of the energy storage device 1000, the second lifting hook 80 is located on the side of the fourth plugging portion 63 facing away from the third plugging portion 251, and is spaced apart from the fourth plugging portion 63. In the width direction of the energy storage device 1000, the second lifting hook 80 is arranged opposite to the first lifting hook 70. The second lifting hook 80 is also used for lifting the battery module 200.

[0078] When the battery module 200 is installed into the housing 111, by providing the first lifting hook 70 on the first end plate 220 and the second lifting hook 80 on the second end plate 260, it is not only convenient to place the battery module 200 into the housing 111, but also can keep the battery module 200 balanced during the installation process, so as to ensure that the battery module 200 is smoothly installed into the housing 111.

[0079] Please refer to Figure 8 、 Figure 9 and Figure 13 , Figure 13 is Figure 9 a schematic structural diagram of the first limiting plate 230 and the second limiting plate 240 in the battery module 200 shown.

[0080] In this embodiment, a part of the first limiting plate 230 is located on the top side of the battery pack 210, and another part is located on one side in the width direction of the battery pack 210, and it is fixedly installed between the second plate 32 of the first end plate 220 and the fifth plate 52 of the second end plate 260. Exemplarily, the first limiting plate 230 is generally L-shaped. Specifically, the first limiting plate 230 includes a first sub-plate 231 and a second sub-plate 232 which are connected to each other. The first sub-plate 231 and the second sub-plate 232 are arranged intersectingly. Among them, the first sub-plate 231 is located on the top side of the battery pack 210. A first mounting post 2311 is provided on the surface of the first sub-plate 231 facing away from the battery pack 210. The first mounting post 2311 is used for fixedly installing the pressing strip 300. In this embodiment, there are multiple first mounting posts 2311. Along the X-axis direction, the multiple first mounting posts 2311 are arranged at intervals. Exemplarily, there are two first mounting posts 2311. Along the X-axis direction, the two first mounting posts 2311 are arranged at intervals.

[0081] The second sub-plate 232 is located on one side in the width direction of the battery pack 210, and is installed between the third plate 33 of the first end plate 220 and the sixth plate 53 of the second end plate 260. Specifically, a second mounting post 2321 is provided on the side of the second sub-plate 232 facing the battery module 200. The second mounting post 2321 passes through the first mounting hole 321 and abuts against the hole wall of the first mounting hole 321, so as to realize the assembly of the first limiting plate 230 and the first end plate 220. In this embodiment, there may be multiple second mounting posts 2321. Along the Z-axis direction, the multiple second mounting posts 2321 are arranged at intervals. Exemplarily, there are two second mounting posts 2321. Each second mounting post 2321 passes through a first mounting hole 321 and abuts against the hole wall of a first mounting hole 321.

[0082] In this embodiment, a part of the second limiting plate 240 is located on the bottom side of the battery pack 210, and another part is located on one side in the width direction of the battery pack 210, and it is fixedly installed between the second plates 32 of the two first end plates 220. Exemplarily, the second limiting plate 240 is generally L-shaped. Specifically, the second limiting plate 240 includes a connected third sub-plate 243 and a fourth sub-plate 244. The third sub-plate 243 and the fourth sub-plate 244 are intersectingly arranged. Among them, the third sub-plate 243 is arranged on the bottom side of the battery pack 210. The fourth sub-plate 244 is arranged on one side in the width direction of the battery pack 210, and is installed between the second plates 32 of the two first end plates 220, and is spaced from the second sub-plate 232. A third mounting post 2441 is provided on the side of the fourth sub-plate 244 facing the battery pack 210. The third mounting post 2441 passes through the second mounting hole 322 and abuts against the hole wall of the second mounting hole 322, so as to realize the assembly of the second limiting plate 240 and the first end plate 220. In this embodiment, there can be multiple third mounting posts 2441. Along the Z-axis direction, the multiple third mounting posts 2441 are spaced apart. Exemplarily, there are two third mounting posts 2441. Each third mounting post 2441 passes through a second mounting hole 322 and abuts against the hole wall of a second mounting hole 322.

[0083] During the assembly process of the battery module 200, along the X-axis direction, the first plate 31 of the first end plate 220 and the fourth plate 51 of the second end plate 260 are respectively installed on opposite sides of the battery pack 210 to clamp the battery pack 210 in the length direction of the battery pack 210, so as to ensure the assembly reliability of the multiple batteries 211 in the battery pack 210 in the length direction. The first sub-plate 231 of the first limiting plate 230 and the third sub-plate 243 of the second limiting plate 240 can fix and limit the battery pack 210 in the height direction of the battery pack 210, further enhancing the assembly reliability of the battery module 200.

[0084] In addition, insulating films (not shown in the figure) are provided on the surfaces of the first limiting plate 230 and the second limiting plate 240 facing the battery pack 210. Exemplarily, the insulating film can be made of polycarbonate material. It can be understood that the first limiting plate 230 and the second limiting plate 240 are usually made of metal materials. By providing insulating films on the surfaces of the first limiting plate 230 and the second limiting plate 240 facing the battery pack 210, the battery pack 210 can be insulated from the first limiting plate 230 and the second limiting plate 240, so that the battery pack 210 can be insulated from the housing 111, and further, the problem of short circuit of the energy storage device 1000 caused by the contact between the battery module 200 and the inner wall of the housing 111 can be avoided.

[0085] Please continue to refer to Figure 8 and Figure 9。The wire harness separator 250 is installed between the third plate 33 of the first end plate 220 and the sixth plate 53 of the second end plate 260. Exemplarily, the wire harness separator 250 can be fixed to the third plate 33 of the first end plate 220 and the sixth plate 53 of the second end plate 260 by fasteners such as screws.

[0086] Please refer to Figure 2 、 Figure 3 and Figure 14 , Figure 14 is Figure 2 the schematic cross-sectional structure diagram of the energy storage device 1000 shown after being cut along B-B.

[0087] In this embodiment, there are multiple battery modules 200. Along the width direction of the energy storage device 1000, the multiple battery modules 200 are arranged at intervals. Among them, the structures of the multiple battery modules 200 are the same. When the multiple battery modules 200 are all installed in the housing 111, along the height direction of the energy storage device 1000, the second assembly 40 of each battery module 200 is arranged opposite to a first assembly 24, and the second insertion part 43 of each second assembly 40 is inserted and fixed to the first insertion part 241 of a first assembly 24. Along the height direction of the energy storage device 1000, the fourth assembly 60 of each battery module 200 is arranged opposite to a third assembly 25, and the fourth insertion part 63 of each fourth assembly 60 is inserted into the third insertion part 251 of a third assembly 25. With this setting, the positions of the multiple battery modules 200 in the housing 111 can be restricted, reducing the risk of collision and short circuit of the multiple battery modules 200 in the housing 111, thereby improving the safety performance of the energy storage device 1000.

[0088] The multiple battery modules 200 may include a first battery module 200a and a second battery module 200b. Hereinafter, taking the first battery module 200a and the second battery module 200b as examples, the installation process of the first battery module 200a and the second battery module 200b and their positional relationship in the housing 111 will be specifically described.

[0089] In this embodiment, along the width direction of the energy storage device 1000, the electrode posts of the battery packs 210 in the first battery module 200a and the electrode posts of the battery modules 200 in the second battery module 200b are arranged at intervals and opposite to each other. With this arrangement, the first battery module 200a and the second battery module 200b are installed horizontally in the housing 111, which can reduce the height and width dimensions of the housing 111, thereby facilitating the reduction of the overall volume of the energy storage device 1000 and contributing to the miniaturized design of the energy storage device 1000. In addition, the energy storage device 1000 further includes a connecting member 600. The connecting member 600 is electrically connected between the first battery module 200a and the second battery module 200b to enable electrical conduction between the first battery module 200a and the second battery module 200b.

[0090] When the electrode posts of the battery packs 210 in the first battery module 200a and the electrode posts of the battery modules 200 in the second battery module 200b are arranged at intervals and opposite to each other, the first battery module 200a further includes a first insulating sheet 270, and the second battery module 200b includes a second insulating sheet 280. Specifically, the first insulating sheet 270 is located on one side of the battery pack 210 in the first battery module 200a in the width direction, and is installed between the first end plate 220 and the second end plate 260 of the first battery module 200a, and covers the electrode posts of the battery pack 210 in the first battery module 200a. Exemplarily, the first insulating sheet 270 can be made of polycarbonate (PC) material. The second insulating sheet 280 is located on one side of the battery pack 210 in the second battery module 200b in the width direction, and is installed between the first end plate 220 and the second end plate 260 of the second battery module 200b, and covers the electrode posts of the battery pack 210 in the second battery module 200b. Along the width direction of the energy storage device 1000, the second insulating sheet 280 and the first insulating sheet 270 are arranged at intervals and opposite to each other. Exemplarily, the second insulating sheet 280 can be made of polycarbonate material.

[0091] In this embodiment, after the first battery module 200a and the second battery module 200b are assembled, the first battery module 200a is first installed into the housing 111. At this time, in the first battery module 200a, the second insertion portion 43 of the second assembly 40 penetrates through the insertion hole of the first assembly 24, the second fastening hole 421 of the second assembly 40 communicates with the first fastening hole 242 of the first assembly 24, the fourth insertion portion 63 of the fourth assembly 60 penetrates through the third insertion portion 251 of the third assembly 25, and the fourth fastening hole 621 of the fourth assembly 60 communicates with the third fastening hole 252 of the third assembly 25.

[0092] Then, the second battery module 200b is installed into the housing 111. At this time, in the second battery module 200b, the second insertion portion 43 of the second assembly 40 penetrates through the insertion hole of the first assembly 24, and the second fastening hole 421 of the second assembly 40 communicates with the first fastening hole 242 of the first assembly 24. The fourth insertion portion 63 of the fourth assembly 60 penetrates through the third insertion portion 251 of the third assembly 25, and the fourth fastening hole 621 of the fourth assembly 60 communicates with the third fastening hole 252 of the third assembly 25. Finally, fasteners such as screws are used to fix the first battery module 200a to the housing 111 and the second battery module 200b to the housing 111, so as to further fix the first battery module 200a and the second battery module 200b, thereby further restricting the positions of the first battery module 200a and the second battery module 200b within the housing 111. Specifically, there are multiple fasteners. A part of the fasteners penetrates through the first fastening hole 242 and the second fastening hole 421 and is fixed to the first assembly 24 and the second assembly 40, so as to assemble the first battery module 200a with the housing 111. Another part of the fasteners penetrates through the third fastening hole 252 and the fourth fastening hole 621 and is fixed to the third assembly 25 and the fourth assembly 60, so as to assemble the second battery module 200b with the housing 111.

[0093] It can be understood that through the insertion fit between the first insertion portion 241 and the second insertion portion 43, and the insertion fit between the third insertion portion 251 and the fourth insertion portion 63, the movement of the battery module 200 within the housing 111 can be restricted. On the one hand, during the use and transportation of the energy storage device 1000, the first battery module 200a and the second battery module 200b can be prevented from moving within the housing 111, reducing the risk of short circuit caused by the first battery module 200a and the second battery module 200b colliding with the inner wall of the housing 111, which is beneficial to improving the safety performance of the energy storage device 1000. On the other hand, during the production process of the energy storage device 1000, when the second battery module 200b is installed into the housing 111, the first battery module 200a and the housing 111 will move on the production line. This setting can also prevent the first battery module 200a from shifting, so as to reserve sufficient installation space for the second battery module 200b within the housing 111 and ensure that the second battery module 200b can be smoothly installed into the housing. At the same time, during the process of the second battery module 200b being installed into the housing, by providing insulating sheets on both the first battery module 200a and the second battery module 200b, the poles of the first battery module 200a and the poles of the second battery module 200b can be prevented from coming into contact, thereby preventing the energy storage device 1000 from short-circuiting when the second battery module 200b is installed into the housing and ensuring better safety performance during the assembly process of the energy storage device 1000.

[0094] After the second battery module 200b is installed in the housing 111, in the width direction of the energy storage device 1000, the second battery module 200b and the first battery module 200a are respectively located on opposite sides of the limiting body 11. In other words, the limiting body 11 is located between the first battery module 200a and the second battery module 200b. It can be understood that when the first battery module 200a and the second battery module 200b move, the limiting body 11 can also limit the first battery module 200a and the second battery module 200b, preventing the first battery module 200a and the second battery module 200b from approaching each other, thereby further reducing the short-circuit risk of the first battery module 200a and the second battery module 200b and ensuring better safety of the energy storage device 1000.

[0095] After the first battery module 200a and the second battery module 200b are assembled with the housing 111, the electrical connection piece 212, the pressure strip 300, and the protection board 400 are installed on the top sides of the two first battery modules 200a and the second battery module 200b. Among them, the connecting piece is connected between a lead-out piece 213 of the first battery module 200a and a lead-out piece 213 of the second battery module 200b to electrically connect the first battery module 200a and the second battery module 200b. The pressure strip 300 is installed between the first sub-board 231 of the first limiting board 230 of the first battery module 200a and the first sub-board 231 of the first limiting board 230 of the second battery module 200b. Specifically, the pressure strip 300 is sleeved on the first mounting post 2311 of the first limiting board 230 of the first battery module 200a and the first mounting post 2311 of the first limiting board 230 of the second battery module 200b. The pressure strip 300 can further limit and fix the first battery module 200a and the second battery module 200b in the height direction of the battery module 200, further improving the assembly reliability of the first battery module 200a and the second battery module 200b in the height direction.

[0096] In the Z-axis direction, the protection board 400 is fixedly installed on the side of the pressure strip 300 facing away from the first battery module 200a and the second battery module 200b. Exemplarily, the protection board 400 can be a battery 211 management system (Battery Management System, BMS). It should be understood that the battery 211 management system has functions such as low-temperature protection and recovery, heating, Bluetooth transmission, communication, short-circuit protection and recovery, overcharge, over-discharge, over-current, and over-temperature protection and recovery to manage, monitor, and protect the first battery module 200a and the second battery module 200b in the energy storage device 1000, thereby helping to improve the utilization rate of the first battery module 200a and the second battery module 200b and extend the service life of the first battery module 200a and the second battery module 200b.

[0097] Please refer to again Figure 1 、 Figure 3 and Figure 15 , Figure 15 is Figure 3 a schematic structural view of the cover assembly 120 in the energy storage device 1000 shown in the figure.

[0098] The cover assembly 120 is installed on the top side of the housing 111 and seals the opening of the receiving cavity 10a of the housing 111. In this embodiment, the cover assembly 120 includes a cover body 121 and two handles 122. Both of the two handles 122 are installed on the side of the cover body 121 facing away from the housing 111. Along the length direction of the cover assembly 120, the two handles 122 are spaced apart. Both of the two handles 122 are rotatably connected to the cover body 121 to facilitate the user to lift and carry the energy storage device 1000. In this embodiment, by installing the two handles 122 on the side of the cover body 121 facing away from the housing 111, it is also possible to avoid occupying the space in the length direction and width direction of the housing 111. At the same time, it is also possible to maximize the utilization of the space in the height direction of the protective housing 100 and improve the utilization rate of the height space of the protective housing 100.

[0099] In the energy storage device 1000 provided by the present application, on the one hand, by providing a first insertion portion 241 and a third insertion portion 251 on the housing 111, and a second insertion portion 43 and a fourth insertion portion 63 on the battery module 200, and making the first insertion portion 241 and the second insertion portion 43 be inserted into each other, and making the third insertion portion 251 and the fourth insertion portion 63 be inserted into each other, during the use and transportation of the energy storage device 1000, even if the screws and other fasteners that fix the battery module 200 to the housing 111 become loose and ineffective, the movement of the battery module 200 can also be restricted. It can not only avoid the poles of the two relatively arranged battery modules 200 from contacting each other and causing a short circuit, but also avoid the battery module 200 from contacting the inner wall of the housing 111 and causing a short circuit. Thus, the risk of the battery module 200 short-circuiting can be avoided, the safety performance of the energy storage device 1000 can be improved, and the use reliability of the energy storage device 1000 can be ensured to be relatively good. On this basis, by providing a limiting body 11 on the bottom case 10 and making the limiting body 11 located between the two relatively arranged battery modules 200, during the transportation and use of the energy storage device 1000, the limiting body 11 can also limit the two relatively arranged battery modules 200 to avoid the poles of the two relatively arranged battery modules 200 from approaching and contacting each other. Thus, the risk of the battery module 200 short-circuiting can be further reduced, and the safety of the energy storage device 1000 can be further improved.

[0100] Meanwhile, by providing an insulating sheet on the battery module 200 and covering the battery terminals of the battery module 200 with the insulating sheet, the charged parts in the battery module 200 can be insulated, and the problem of short circuit caused by the battery terminals of two relatively arranged battery modules 200 coming into contact with each other can be prevented. Thereby, it also helps to reduce the short circuit risk of the battery module 200 in the energy storage device 1000, ensuring better safety and reliability in use of the energy storage device 1000.

[0101] The above are only some embodiments and implementation manners of the present application. The protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An energy storage device, characterized in that, It includes a housing and a battery module. The housing is provided with a receiving cavity. The receiving cavity includes a cavity bottom wall and a cavity side wall. The cavity side wall is fixedly connected to the cavity bottom wall and is arranged around the peripheral side of the cavity bottom wall. A first assembly is provided on the cavity side wall. The first assembly is located inside the receiving cavity. A first insertion part is provided on the side of the first assembly facing away from the cavity bottom wall. The battery module is located inside the receiving cavity. The battery module includes a battery pack and a first end plate. The first end plate is located on the side of the battery pack facing the cavity side wall and abuts against the battery pack. A second assembly is provided on the side of the first end plate facing away from the battery pack. In the height direction of the energy storage device, the second assembly is located on the side of the first assembly facing away from the cavity bottom wall and is arranged opposite to the first assembly. The second assembly is provided with a second insertion part. The second insertion part is inserted into the first insertion part.

2. The energy storage device according to claim 1, characterized in that The first assembly is further provided with a first fastening hole. The opening of the first fastening hole is located on the surface of the first assembly facing away from the cavity bottom wall. The first fastening hole is arranged at an interval from the first insertion part. The second assembly is further provided with a second fastening hole. The second fastening hole penetrates through the second assembly in the thickness direction of the second assembly, is arranged at an interval from the second insertion part, and is communicated with the first fastening hole. The energy storage device is further provided with a fastener. The fastener passes through the first fastening hole and the second fastening hole and is fixed to both the first assembly and the second assembly.

3. The energy storage device according to claim 1 or 2, characterized in that, The first insertion part is a plug hole. The opening of the plug hole is located on the surface of the first assembly facing away from the cavity bottom wall. The second insertion part passes through the plug hole. Alternatively, the second insertion part is a plug hole. The plug hole penetrates through the second assembly in the thickness direction of the second assembly. The first insertion part passes through the plug hole.

4. The energy storage device according to claim 1, characterized in that, A third assembly is further provided on the cavity side wall. In the length direction of the energy storage device, the third assembly is arranged at an interval and opposite to the first assembly. A third insertion part is provided on the side of the third assembly facing away from the cavity bottom wall. The battery module further includes a second end plate. In the length direction of the energy storage device, the second end plate and the first end plate are arranged in opposite directions and are respectively located on opposite sides of the battery pack and both abut against the battery pack. A fourth assembly is provided on the side of the second end plate facing away from the battery pack. In the height direction of the energy storage device, the fourth assembly is located on the side of the third assembly facing away from the cavity bottom wall and is arranged opposite to the third assembly. The fourth assembly is provided with a fourth insertion part. The fourth insertion part is inserted into the third insertion part.

5. The energy storage device according to claim 4, wherein There are multiple first assemblies. In the width direction of the energy storage device, the first assemblies are arranged at intervals. There are multiple third assemblies. In the width direction of the energy storage device, the third assemblies are arranged at intervals. In the length direction of the energy storage device, each third assembly is arranged at an interval and opposite to one first assembly. There are multiple battery modules, and the multiple battery modules are arranged at intervals along the width direction of the energy storage device. Along the height direction of the energy storage device, the second assembly of each battery module is arranged opposite to one first assembly, and the second plug-in portion of each second assembly is plugged and fixed with the first plug-in portion of one first assembly. Along the height direction of the energy storage device, the fourth assembly of each battery module is arranged opposite to one third assembly, and the fourth plug-in portion of each fourth assembly is plugged into the third plug-in portion of one third assembly.

6. The energy storage device according to claim 5, wherein The plurality of battery modules include a first battery module and a second battery module. Along the width direction of the energy storage device, the poles of the battery pack in the first battery module and the poles of the battery pack in the second battery module are arranged opposite to each other.

7. The energy storage device according to claim 6, wherein The cavity bottom wall is provided with a limiting body, and the limiting body is located in the receiving cavity and between the first battery module and the second battery module.

8. The energy storage device according to claim 7, wherein The first battery module includes a first insulating sheet, which is located on one side of the battery pack of the first battery module in the width direction and is installed between the first end plate and the second end plate of the first battery module, and covers the electrode of the battery pack of the first battery module; The second battery module includes a second insulating sheet, which is located on one side of the battery pack of the second battery module in the width direction, and is installed between the first end plate and the second end plate of the second battery module, and covers the pole of the battery pack of the second battery module. Along the width direction of the energy storage device, the second insulating sheet and the first insulating sheet are spaced and arranged opposite to each other.

9. The energy storage device according to claim 8, wherein, Along the height direction of the energy storage device, the first insulating sheet and the second insulating sheet are both located on a side of the limiting body facing away from the cavity bottom wall.

10. The energy storage device according to any one of claims 4 to 9, characterized in that, A first hook is further provided on a side of the first end plate facing away from the battery pack. Along the height direction of the energy storage device, the first hook is located on a side of the second plug-in portion facing away from the first plug-in portion and is spaced apart from the second plug-in portion. A second hook is further provided on the side of the second end plate facing away from the battery pack. Along the height direction of the energy storage device, the second hook is located on the side of the fourth plug-in portion facing away from the third plug-in portion, and is spaced apart from the third plug-in portion. Along the width direction of the energy storage device, the second hook is arranged opposite to the first hook.

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