Energy storage device

Abstract

According to the energy storage device provided by the invention, the production process of the energy storage device can be optimized, and management and control points on a production chain of the energy storage device are reduced, so that the production efficiency of the energy storage device is improved. The energy storage device comprises a shell, a plurality of batteries and a cover body assembly, the batteries are all installed in the shell, the batteries are sequentially arranged in the length direction of the energy storage device, the cover body assembly comprises a cover body and a protection plate, the cover body is installed on the top side of the shell, and the protection plate is fixedly installed on the side, facing the shell, of the cover body. And the cover body and the surface, facing the battery, of the cover body are arranged at intervals.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device. Background Art

[0002] Energy storage devices are energy storage components that provide electricity to electrical equipment and are one of the important components of electrical equipment. In the assembly process of energy storage devices, usually the battery cells are first assembled to obtain a battery pack, and then the protection board and other components are installed on the battery pack to obtain a battery module. The battery module is then placed in a protective casing and finally sealed to obtain the energy storage device. However, the assembly process of this type of energy storage device is relatively long, and there are many control points in the production chain, resulting in low production efficiency of the energy storage device. Utility Model Content

[0003] The present application provides an energy storage device, which can optimize the production process of the energy storage device and reduce the control points in the production chain of the energy storage device, thereby helping to improve the production efficiency of the energy storage device.

[0004] The present application provides an energy storage device including a shell, multiple batteries and a cover assembly, wherein the multiple batteries are installed in the shell, and the multiple batteries are arranged in sequence along the length direction of the energy storage device. The cover assembly includes a cover and a protective plate, the cover is installed on the top side of the shell, the protective plate is fixedly installed on a side of the cover facing the shell, and is spaced apart from a surface of the cover facing the batteries, and is spaced apart from the batteries.

[0005] In which, the cover body is provided with a plurality of fixing columns, and the plurality of fixing columns are all located on the surface of the cover body facing the shell and are spaced apart from each other, and each fixing column is provided with a first fixing hole, and the opening of the first fixing hole is located on the surface of the fixing column away from the cover body; the protective plate is provided with a plurality of second fixing holes, and the plurality of second fixing holes all penetrate the protective plate along the thickness direction of the protective plate, and each of the second fixing holes is connected to the first fixing hole of one of the fixing columns; the cover body assembly also includes a plurality of fasteners, each of the fasteners is passed through one of the second fixing holes and the first fixing hole of one of the fixing columns, and is fixedly connected to the cover body and the protective plate.

[0006] In which, the cover body is provided with a positive through hole and a negative through hole, and the positive through hole and the negative through hole both penetrate the cover body along the thickness direction of the cover body and are arranged at intervals from each other, and along the width direction of the cover body, the positive through hole and the negative through hole are both located on the same side of the cover body; the cover body assembly also includes a positive connection part and a negative connection part, the positive connection part includes a positive connection terminal and a positive wiring harness, the positive connection terminal is installed in the positive through hole, and the positive wiring harness is electrically connected between the positive connection terminal and the battery, and the negative connection part includes a negative connection terminal and a negative wiring harness, the negative connection terminal is installed in the negative through hole, and the negative wiring harness is electrically connected between the negative connection terminal and the protective plate.

[0007] Wherein, the housing comprises a bottom shell and a side shell, the side shell is arranged around the edge of the bottom shell and is fixedly connected to the bottom shell, and the side shell is provided with a limiter, the limiter is located on the surface of the side shell facing the battery and abuts against the battery;

[0008] Wherein, the energy storage device further includes a plurality of elastic members, and the plurality of elastic members are all located in the shell and clamped between the limiting body and the plurality of batteries.

[0009] Wherein, the limiting body includes a guide surface, the guide surface is located on the side of the limiting body away from the bottom shell, the guide surface includes a first side close to the battery and a second side arranged opposite to the first side, and the distance between the guide surface and the bottom shell gradually decreases in the direction from the second side to the first side.

[0010] Wherein, along the height direction of the energy storage device, surfaces of the plurality of batteries facing away from the bottom shell are located on a side of the first side facing away from the bottom shell.

[0011] Wherein, the limiting body includes two first limiting parts and two second limiting parts, the two first limiting parts and the two second limiting parts are arranged at intervals from each other, along the length direction of the energy storage device, the two first limiting parts are respectively located on the opposite sides of the plurality of batteries, and both can abut against the batteries, along the width direction of the energy storage device, the two second limiting parts are respectively located on the opposite sides of the plurality of batteries, and both can abut against the batteries.

[0012] Wherein, each of the first limiting portions includes a first sub-limiting portion and two second sub-limiting portions. Along the width direction of the energy storage device, the first sub-limiting portion and the two second sub-limiting portions are spaced apart from each other, and the first sub-limiting portion is located between the two second sub-limiting portions. Along the length direction of the energy storage device, the first sub-limiting portion is spaced apart from and opposite to the battery, and the two second sub-limiting portions are both in contact with the battery.

[0013] Among them, each of the first limiting parts is provided with a first mounting hole, and the opening of the first mounting hole is located on the surface of the first limiting part facing away from the bottom case; the energy storage device further includes a pressing member, the pressing member is installed on the side of the plurality of batteries facing away from the bottom case and is located on the side of the first limiting part facing away from the bottom case, the pressing member is provided with a plurality of second mounting holes, the plurality of second mounting holes penetrate through the pressing member along the thickness direction of the pressing member and are spaced apart from each other, and each second mounting hole communicates with one first mounting hole; the energy storage device further includes a plurality of fixing members, each fixing member passes through one second mounting hole and one first mounting hole and is fixed to both the pressing member and the first limiting part.

[0014] Among them, the pressing member is provided with a plurality of avoidance holes, the plurality of avoidance holes penetrate through the pressing member along the thickness direction of the pressing member and are spaced apart from each other, and are spaced apart from the plurality of second mounting holes, and each avoidance hole is disposed opposite to the explosion-proof valve of one battery.

[0015] In the technical solution provided by the present application, by arranging the protection board on the cover body, the assembly process of components such as the cover body and the protection board can be separated from the assembly process of the housing and the battery, so that the entire assembly process of the existing energy storage device can be split into two production chains, reducing the control points on the two split production chains. On the one hand, it helps to optimize the production process of the energy storage device and improve the production efficiency of the energy storage device. On the other hand, after the assembly process of the energy storage device is split, the control points on each production chain become fewer, and some production processes can also be optimized, reducing production costs and achieving the purpose of cost reduction and efficiency improvement. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be described below.

[0017] Figure 1 is a schematic structural diagram of an energy storage device provided by an embodiment of the present application;

[0018] Figure 2 is Figure 1 a partial structural diagram of the energy storage device shown;

[0019] Figure 3 is Figure 1 an exploded structural diagram of the energy storage device shown;

[0020] Figure 4 is Figure 3 a structural diagram of the housing of the protective shell in the energy storage device shown;

[0021] Figure 5 is Figure 4 a schematic structural view of the shown housing at another angle;

[0022] Figure 6 is Figure 4 a schematic structural view of the shown housing at yet another angle;

[0023] Figure 7 is Figure 4 a schematic structural view of the shown housing after being cut along A-A;

[0024] Figure 8 is Figure 3 a schematic structural view of the battery module in the shown energy storage device;

[0025] Figure 9 is Figure 3 a schematic structural view of the cover assembly in the shown energy storage device;

[0026] Figure 10 is Figure 9 a schematic structural view of the shown cover assembly at another angle;

[0027] Figure 11 is Figure 9 a schematic exploded view of the shown cover assembly;

[0028] Figure 12 is Figure 11 a schematic structural view of the cover and the switch trigger arm in the shown cover assembly;

[0029] Figure 13 is Figure 11 a schematic structural view of the cover and the switch trigger arm at another angle;

[0030] Figure 14 is Figure 12 a schematic structural view of the shown cover after being cut along B-B;

[0031] Figure 15 is Figure 11 a schematic structural view of the protection board in the shown cover assembly;

[0032] Figure 16 is Figure 11 a schematic structural view of the switch component in the shown cover assembly;

[0033] Figure 17 is Figure 1 a schematic cross-sectional view of the shown energy storage device after being cut along C-C;

[0034] Figure 18 is Figure 1 a schematic view of the assembly process of the shown energy storage device. Detailed implementation manners

[0035] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0036] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of the energy storage device 1000 provided in an embodiment of the present application, Figure 2 yes Figure 1 A partial structural diagram of the energy storage device 1000 is shown, Figure 3 yes Figure 1 The schematic diagram of the exploded structure of the energy storage device 1000 is shown. 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. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0037] In an embodiment of the present application, the energy storage device 1000 may be a device having a power storage function such as a connecting harness or a battery system. The energy storage device 1000 includes a protective shell 100, a battery module 200, a plurality of elastic members 300, and a plurality of fixing members 400. The battery module 200 and the plurality of elastic members 300 are both located in the protective shell 100. Among them, the plurality of elastic members 300 are supported between the battery module 200 and the protective shell 100. The plurality of elastic members 300 can fill the gap between the battery module 200 and the protective shell 100 to limit the battery module 200, so that the battery module 200 is fixed in the protective shell 100. The plurality of fixing members 400 are used to fix the battery module 200 and the protective shell 100. In addition, the length direction of the protective shell 100 is parallel to the X-axis direction, the width direction of the protective shell 100 is parallel to the Y-axis direction, and the height direction of the protective shell 100 is parallel to the Z-axis direction.

[0038] It should be noted that the directional words such as “outside” and “inside” mentioned in the embodiments of the present application when describing the energy storage device 1000 are all in Figure 1 The energy storage device 1000 is described in terms of its orientation, with the side facing away from the interior of the protective housing 100 being referred to as “outside” and the side facing the interior of the protective housing 100 being referred to as “inside”. Similar descriptions hereinbelow may be understood in the same manner.

[0039] Please refer to Figure 4 and Figure 5 , Figure 4 yes Figure 3 The schematic diagram of the structure of the housing 110 of the protective housing 100 in the energy storage device 1000 is shown. Figure 5 yes Figure 4 The structure of the housing 110 is shown in another perspective.

[0040] The protective housing 100 includes a housing body 110 and a cover assembly 120, and the cover assembly 120 covers the top side of the housing body 110. Among them, the housing body 110 includes a bottom case 11 and side cases 12. Specifically, the side cases 12 are disposed around the edge of the bottom case 11 and are fixedly connected to the bottom case 11.

[0041] In this embodiment, the bottom case 11 is provided with a plurality of recesses 111. The openings of the plurality of recesses 111 are all located on the surface of the bottom case 11 facing away from the side cases 12. The plurality of recesses 111 are all recessed from the surface of the bottom case 11 facing away from the side cases 12 towards the side cases 12. Along the X-axis direction, the plurality of recesses 111 are spaced apart.

[0042] It can be understood that when the protective housing 100 is placed on the ground, by providing a plurality of recesses 111 on the bottom case 11, the contact surface between the housing body 110 of the protective housing 100 and the ground can be reduced, and the friction coefficient between the housing body 110 and the ground can be increased, thereby helping to increase the frictional force between the housing body 110 of the protective housing 100 and the ground, so that the housing body 110 has an anti-slip effect.

[0043] Please refer to Figure 4 、 Figure 6 and Figure 7 , Figure 6 is Figure 4 a schematic structural view of the housing body 110 shown at another angle, Figure 7 is Figure 4 a schematic structural view of the housing body 110 shown in section along the line A-A. Among them, "sectioned along the line A-A" means sectioned along the plane where the line A-A is located, and the same understanding can be made for similar descriptions hereinafter.

[0044] The side cases 12 include two first sub-side plates 121 and two second sub-side plates 122. Among them, along the length direction of the protective housing 100 (the X-axis direction shown in the figure), the two first sub-side plates 121 are spaced apart and arranged oppositely. The two second sub-side plates 122 are both connected between the two first sub-side plates 121. Along the Y-axis direction, the two second sub-side plates 122 are spaced apart and arranged oppositely.

[0045] In this embodiment, the side case 12 is further provided with a limiting body 123. Specifically, the limiting body 123 is located on the surface of the side case 12 facing the battery module 200 and protrudes from the surface of the side case 12 facing the battery module 200 towards the battery module 200. Exemplarily, when the battery module 200 is installed into the housing body 110, the limiting body 123 is spaced apart from the battery module 200. At this time, the limiting body 123 realizes the limiting effect on the battery module 200 through the elastic member 300. In some other embodiments, the limiting body 123 can also directly abut against the battery module 200 to directly limit the battery module 200.

[0046] In this embodiment, the limiting body 123 includes a guiding surface 123a. Specifically, the guiding surface 123a is located on the side of the limiting body 123 away from the bottom shell 11. The guiding surface 123a includes a first side 1231 close to the battery module 200 and a second side 1232 oppositely arranged with respect to the first side 1231. In the direction from the second side 1232 to the first side 1231, the distance between the guiding surface 123a and the bottom shell 11 gradually decreases. In other words, the guiding surface 123a of the limiting body 123 is inclined so as to facilitate the smooth installation of the battery module 200 into the housing 110.

[0047] The limiting body 123 further includes two first limiting portions 123b and two second limiting portions 123c, and the two first limiting portions 123b and the two second limiting portions 123c are spaced apart from each other. In some other embodiments, the two first limiting portions 123b and the two second limiting portions 123c may also be integrally formed.

[0048] In this embodiment, along the X-axis direction, the two first limiting portions 123b are respectively located on the opposite sides of the battery module 200 and can both abut against the battery module 200. Specifically, each first limiting portion 123b is located on the surface of a first sub-side plate 121 facing the battery module 200. Each first limiting portion 123b includes a first sub-limiting portion 1233 and two second sub-limiting portions 1234. Along the width direction of the energy storage device 1000 (the illustrated Y-axis direction), the first sub-limiting portion 1233 and the two second sub-limiting portions 1234 are spaced apart from each other, and the first sub-limiting portion 1233 is located between the two second sub-limiting portions 1234. When the battery module 200 is located in the housing 110, along the length direction of the energy storage device 1000, the first sub-limiting portion 1233 is spaced and oppositely arranged with respect to the battery module 200, and the two second sub-limiting portions 1234 both abut against the battery module 200. With this arrangement, space can be reserved for the battery module 200 when the battery in the battery module 200 expands, thereby helping to reduce the force exerted on the housing 110 when the battery in the battery module 200 expands, and further helping to extend the service life of the housing 110.

[0049] In addition, each first limiting portion 123b is further provided with a first mounting hole 1235, and the opening of the first mounting hole 1235 is located on the surface of the first limiting portion 123b away from the bottom shell 11. Specifically, the first mounting holes 1235 are all provided in the first sub-limiting portion 1233. Exemplarily, there are two first mounting holes 1235. Along the Y-axis direction, the two first mounting holes 1235 are spaced apart.

[0050] It can be understood that by providing a first limiting portion 123b on the surface of each first sub-side plate 121 facing the battery module 200, the limiting in the length direction (the X-axis direction shown in the figure) of the battery module 200 can be achieved, preventing the battery module 200 from displacing due to expansion during use and avoiding the battery module 200 from moving in the X-axis direction. At the same time, by providing a first mounting hole 1235 on the first sub-limiting portion 1233 of each first limiting portion 123b, a fixing hole position can be provided for the subsequent installation of the pressing member 230.

[0051] In the width direction of the protective housing 100, the two second limiting portions 123c are respectively located on the opposite sides of the battery module 200 and can both abut against the battery module 200. Specifically, each second limiting portion 123c is located on the surface of a second sub-side plate 122 facing the battery module 200.

[0052] In addition, the housing 110 is further provided with a first locking portion 13. Specifically, the first locking portion 13 is provided on the outer surface of the housing 110 and is close to the opening of the housing 110. In this embodiment, there are multiple first locking portions 13, and the multiple first locking portions 13 are arranged at intervals around the periphery of the housing 110. Exemplarily, the first locking portion 13 is a card slot. Specifically, the openings of the first locking portions 13 are all located on the outer surface of the housing 110, and the first locking portions 13 are recessed from the outer surface of the housing 110 towards the inner surface of the housing 110. In some other embodiments, the first locking portion 13 can also be a buckle.

[0053] Please refer to again Figure 2 and Figure 3 In this embodiment, the multiple elastic members 300 are all substantially sheet-shaped. Exemplarily, the elastic member 300 is an ethylene-vinyl acetate copolymer (EVA) foam. In some other embodiments, the elastic member 300 can also be a silica gel pad.

[0054] In this embodiment, the multiple elastic members 300 include two first elastic members 310 and two second elastic members 320. Among them, in the X-axis direction, the two first elastic members 310 are arranged at intervals on the opposite sides of the battery module 200. Each first elastic member 310 is clamped between the battery module 200 and a first limiting portion 123b of the side shell 12. Exemplarily, each first elastic member 310 includes two sub-elastic portions 311. In the Y-axis direction, the two sub-elastic portions 311 are arranged at intervals. Each sub-elastic portion 311 is clamped between a second sub-limiting portion 1234 of a first limiting portion 123b and the battery module 200. In some other embodiments, the two sub-elastic portions 311 can also be integrally formed.

[0055] In this embodiment, by setting the first elastic member 310, the excess gap between the battery module 200 and the first limiting portion 123b can be eliminated, so that the first limiting portion 123b can limit the length direction of the battery module 200 (the X-axis direction shown in the figure), prevent the battery module 200 from being displaced due to expansion during use, and avoid the battery module 200 from moving along the X-axis direction.

[0056] Along the Y-axis direction, two second elastic members 320 are spaced apart on opposite sides of the battery module 200. Each second elastic member 320 is clamped between the battery module 200 and a second limiting portion 123c. It can be understood that by providing the second elastic member 320, the redundant gap between the battery module 200 and the second limiting portion 123c can be eliminated, so that the second limiting portion 123c can limit the width direction (the Y-axis direction in the figure) of the battery module 200, prevent the battery module 200 from being displaced due to expansion during use, and avoid the battery module 200 from moving along the Y-axis direction.

[0057] In this embodiment, by providing a limiter 123 and a plurality of elastic members 300 inside the protective housing 100, the battery module 200 can be limited in the length direction and width direction of the battery module 200, respectively, to prevent the battery module 200 from moving along the X-axis direction and the Y-axis direction. At the same time, providing the limiter 123 on the side shell 12 can also strengthen the structural strength of the housing 110 of the protective housing 100, thereby improving the reliability of the protective housing 100.

[0058] Please refer to Figure 2 and Figure 8 , Figure 8 yes Figure 3 A schematic structural diagram of a battery module 200 in an energy storage device 1000 is shown.

[0059] In this embodiment, the battery module 200 includes a battery pack 210, two heating films 220 and a clamping member 230. Among them, along the Z-axis direction, the clamping member 230 is located on the side of the battery pack 210 away from the bottom shell 11. Along the Y-axis direction, the two heating films 220 are respectively arranged on opposite sides of the battery pack 210, and both are in contact with the battery pack 210. Among them, each heating film 220 is located between the battery pack 210 and a second limiting portion 123c. It should be understood that charging the battery pack 210 in a low temperature environment will cause damage to the battery pack 210. Under this setting, when the battery pack 210 needs to be charged in a low temperature environment, the battery pack 210 can be heated by the heating film 220 first, and then the battery pack 210 can be charged, so as to avoid the situation where the battery pack 210 is damaged due to charging in a low temperature environment, thereby helping to extend the service life of the battery pack 210.

[0060] In this embodiment, the battery pack 210 includes a plurality of batteries 211, a plurality of gaskets 212, a plurality of electrical connection sheets 213, and two lead-out sheets 214. Among them, the plurality of batteries 211 are connected in series or in parallel through the plurality of electrical connection sheets 213, and the positive and negative electrodes of the battery pack 210 are led out through the two lead-out sheets 214, which will be specifically described below.

[0061] In this embodiment, along the length direction of the battery module 200 (the X-axis direction shown in the figure), the plurality of batteries 211 are arranged in sequence. 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.

[0062] In this embodiment, the number of the batteries 211 depends on the capacity requirement of the battery module 200. Exemplarily, there are four batteries 211. The four batteries 211 are respectively a first battery 211a, a second battery 211b, a third battery 211c, and a fourth battery 211d. Along the X-axis direction, the first battery 211a, the second battery 211b, the third battery 211c, and the fourth battery 211d are arranged in sequence.

[0063] Each gasket 212 is located between two adjacent batteries 211 to prevent short circuit caused by direct contact between two adjacent batteries 211. Each gasket 212 is provided with a through hole (not shown in the figure). The through hole penetrates the gasket 212 along the thickness direction of the gasket 212. It should be understood that during the use of the battery module 200, the batteries 211 in the battery pack 210 will expand. Among them, the expansion direction of the batteries 211 in the battery pack 210 is parallel to the X-axis direction. For the battery pack 210 as a whole, both side surfaces in the length direction of the battery pack 210 (the X-axis direction shown in the figure) are expansion surfaces. By providing a through hole (not shown in the figure) on the gasket 212, an expansion space can be reserved for the batteries 211, which helps to reduce the internal pressure after the batteries 211 expand, prevent the batteries 211 from exploding, and thus helps to extend the service life of the battery pack 210.

[0064] In this embodiment, the multiple electrical connection pieces 213 and the two lead-out pieces 214 are all made of metal materials. Exemplarily, the multiple electrical connection pieces 213 and the two lead-out pieces 214 are all made of copper metal materials. Among them, the multiple electrical connection pieces 213 are electrically connected to the multiple batteries 211. Among them, each electrical connection piece 213 is electrically connected between two adjacent batteries 211. Specifically, one end of each electrical connection piece 213 is electrically connected to the positive connection terminal of one battery 211, and the other end is electrically connected to the negative connection terminal of another battery 211. In some other embodiments, when the multiple batteries 211 are connected in parallel, some of the electrical connection pieces 213 are electrically connected between the positive connection terminals of two batteries 211, and some of the electrical connection pieces 213 are electrically connected between the negative connection terminals of two batteries 211.

[0065] In this embodiment, each electrical connection piece 213 is provided with a plurality of assembly holes (not labeled in the figure). The plurality of assembly holes penetrate through the electrical connection piece 213 along the thickness direction of the electrical connection piece 213 and are spaced apart from each other. The plurality of assembly holes are used to fix the voltage sampling wires (not shown) of the battery 211. It can be understood that the voltage sampling wires can realize the electrical connection between the battery 211 and the test instrument. The voltage of the battery 211 can be transmitted to the test instrument through the voltage sampling wires, and the user can perform data analysis on the voltage of the battery 211 through the test instrument to realize the real-time monitoring of the voltage state of the battery 211, so as to be able to understand the state and health of the battery 211 in real time.

[0066] Each lead-out piece 214 is electrically connected to one battery 211. In this embodiment, the two lead-out pieces 214 are respectively a first lead-out piece 214a and a second lead-out piece 214b. Among them, the first lead-out piece 214a is electrically connected to the first battery 211a of the battery pack 210, and the second lead-out piece 214b is electrically connected to the fourth battery 211d of the battery pack 210. In addition, through holes (not labeled in the figure) for fixing the power line and the voltage sampling line are provided on both the first lead-out piece 214a and the second lead-out piece 214b, so that the battery module 200 can be electrically connected to other components in the energy storage device 1000.

[0067] In this embodiment, the polarities of the first lead-out piece 214a and the second lead-out piece 214b are opposite to each other to realize the lead-out of the positive and negative poles of the battery pack 210. Exemplarily, the polarity of the first lead-out piece 214a is positive, and the polarity of the second lead-out piece 214b is negative. In some other embodiments, the polarity of the first lead-out piece 214a can also be negative, and the polarity of the second lead-out piece 214b can also be positive.

[0068] Please continue to refer to Figure 8。In this embodiment, the pressing member 230 is generally in a "Ji" shape and is made of a metal material. The pressing member 230 is provided with a plurality of second mounting holes 231 and a plurality of avoiding holes 232. The plurality of second mounting holes 231 and the plurality of avoiding holes 232 penetrate through the pressing member 230 along the thickness direction of the pressing member 230 and are arranged at intervals from each other. Among them, the plurality of second mounting holes 231 can be divided into two groups. Along the X-axis direction, the two groups of second mounting holes 231 are arranged at intervals. Exemplarily, each group includes two second mounting holes 231. Along the Y-axis direction, the two second mounting holes 231 in each group are arranged at intervals. Each second mounting hole 231 communicates with a first mounting hole 1235. The plurality of avoiding holes 232 are all located between the two groups of second mounting holes 231. Along the X-axis direction, the plurality of avoiding holes 232 are arranged at intervals. Each avoiding hole 232 is disposed opposite to an explosion-proof valve of a battery 211. When the explosion-proof valve of the battery 211 ruptures, each avoiding hole 232 can avoid an explosion-proof valve of a battery 211.

[0069] In this embodiment, the pressing member 230 further includes a first portion 233 and two second portions 234. Among them, the first portion 233 is provided with the above-mentioned plurality of avoiding holes 232. The two second portions 234 are both fixedly connected to the first portion 233. Along the X-axis direction, the two second portions 234 are respectively located on opposite sides of the first portion 233. Each second portion 234 is provided with the above-mentioned second mounting holes 231.

[0070] After the pressing member 230 is installed on the battery pack 210, the first portion 233 is installed on the surface of the battery pack 210 facing away from the bottom case 11. Along the X-axis direction, the two second portions 234 are respectively located on opposite sides of the battery pack 210. Along the Z-axis direction, the two second portions 234 are both located on the side of the first sub-limiting portion 1233 of the first limiting portion 123b facing away from the bottom case 11, so that each second mounting hole 231 can be correspondingly arranged and communicated with a first mounting hole 1235.

[0071] Please refer to again Figure 2 。During the assembly process of the battery module 200, first, a plurality of batteries 211 are arranged neatly in the housing 110 according to the requirements of capacity and voltage required in the actual production process, and then a plurality of electrical connection pieces 213, a first lead-out piece 214a, and a second lead-out piece 214b are welded to the plurality of batteries 211 to obtain the battery pack 210. Then, directly in the housing 110, a plurality of electrical connection pieces 213, a first lead-out piece 214a, and a second lead-out piece 214b are welded to the plurality of batteries 211 to obtain the battery pack 210. Immediately afterwards, two heating films 220 and the pressing member 230 are respectively installed on the battery pack 210 to assemble the battery module 200.

[0072] In this embodiment, after a plurality of batteries 211 are installed in the housing 110 of the protective housing 100, in the Z-axis direction, the distance between the second side 1232 of the guiding surface 123a of the limiting body 123 and the bottom case 11 is less than the distance between the surface of the battery 211 facing away from the bottom case 11 and the bottom case 11. In other words, the limiting body 123 on the opposite side of the battery 211 protrudes from the side case 12. With this arrangement, the housing 110 of the protective housing 100 can be used as a jig for assembling the battery module 200. At this time, a plurality of batteries 211 can be directly assembled with components such as a plurality of electrical connection pieces 213, two lead-out pieces 214, and a pressing member 230, without first welding the batteries 211 to the electrical connection pieces 213 and the lead-out pieces 214 and then placing them in the housing 110, which helps to optimize the assembly process of the battery module 200, shorten the assembly time of the battery module 200, and improve the production efficiency of the energy storage device 1000.

[0073] Finally, the battery module 200 and the housing 110 of the protective housing 100 are fixed by fixing members 400. Specifically, each fixing member 400 passes through a second mounting hole 231 and a first mounting hole 1235, and is fixed to a pressing member 230 and a first limiting portion 123b, so that the battery module 200 and the housing 110 are assembled. It can be understood that by using the fixing members 400 to fix the pressing member 230 and the first limiting portion 123b, the battery module 200 can be limited in the height direction of the battery module 200.

[0074] In this embodiment, by providing the limiting body 123 inside the housing 110 and cooperating with the limiting body 123 and the elastic member 300, the battery module 200 can be limited in the length direction, width direction, and height direction of the battery module 200 respectively, so that the battery module 200 can be fixedly installed in the housing 110.

[0075] Please refer to Figure 9 and Figure 10 , Figure 9 is Figure 3 a schematic structural diagram of the cover body assembly 120 in the energy storage device 1000 shown in Figure 10 is Figure 9 a schematic structural diagram of the cover body assembly 120 shown in another angle.

[0076] The cover body assembly 120 is installed on the top side of the housing 110 and seals the opening of the housing 110. In this embodiment, the cover body assembly 120 includes a plurality of fasteners 10, a protection board 20, a cover body 30, a positive connection portion 40, a negative connection portion 50, a handle 60, a communication component 70, a switch member 80, a switch trigger arm ( Figure 9 and Figure 10(not shown) and a waterproof and breathable film (not shown in the figure). The protection board 20, the positive connection part 40, the negative connection part 50, the handle 60, the switch trigger arm, the communication component 70, the switch 80 and the waterproof and breathable film are all installed on the cover body 30.

[0077] Please refer to Figures 11 to 13 , Figure 11 is Figure 9 the exploded structural schematic diagram of the cover body assembly 120 shown in Figure 12 is Figure 11 the structural schematic diagram of the cover body 30 and the switch trigger arm 90 in the cover body assembly 120 shown in Figure 13 is Figure 11 the structural schematic diagram of the cover body 30 and the switch trigger arm 90 at another angle shown in

[0078] In this embodiment, the cover body 30 is provided with a positive through hole 31, a negative through hole 32, a ventilation hole 33, a fitting hole 34, two mounting grooves 35, an assembly groove 36, a light-transmitting hole 37 and a communication mounting hole 38. Among them, the positive through hole 31, the negative through hole 32, the ventilation hole 33, the light-transmitting hole 37 and the fitting hole 34 all penetrate through the cover body 30 along the thickness direction of the cover body 30 (the Z-axis direction shown in the figure), and are spaced from each other. Specifically, the positive through hole 31 and the negative through hole 32 are both located on one side of the cover body 30 in the Y-axis direction. Along the X-axis direction, the positive through hole 31 and the negative through hole 32 are spaced apart. The light-transmitting hole 37 and the fitting hole 34 are both located on the other side of the cover body 30 in the Y-axis direction. Along the Y-axis direction, the light-transmitting hole 37 and the fitting hole 34 are spaced apart. Exemplarily, there are two light-transmitting holes 37. Along the Y-axis direction, the two light-transmitting holes 37 are spaced apart. The ventilation hole 33 is located on one side of the cover body 30 in the length direction. The ventilation hole 33 is beneficial to the air replacement of the protective housing 100, avoiding the occurrence of high pressure inside the protective housing 100, so as to avoid the bulging of the battery module 200 due to internal high pressure.

[0079] The assembly groove 36 is arranged around the circumference of the ventilation hole 33. Specifically, the opening of the assembly groove 36 is located on the inner surface of the cover body 30. The assembly groove 36 is recessed from the inner surface of the cover body 30 towards the outer surface, and penetrates through the hole wall surface of the ventilation hole 33. The openings of the two mounting grooves 35 are both located on the outer surface of the cover body 30. The two mounting grooves 35 are both recessed from the outer surface of the cover body 30 towards the inner surface, and both penetrate through part of the outer side surface of the cover body 30, and are spaced from the positive through hole 31, the negative through hole 32, the fitting hole 34 and the light-transmitting hole 37. Along the X-axis direction, the two mounting grooves 35 are spaced apart. The communication mounting hole 38 is located on one side of the cover body 30 in the X-axis direction, and penetrates through the cover body 30 along the X-axis direction, and is spaced from the mounting groove 35. Exemplarily, there are two communication mounting holes 38. Along the Y-axis direction, the two communication mounting holes 38 are spaced apart.

[0080] The cover body 30 is further provided with a plurality of fixing columns 39. The plurality of fixing columns 39 are all located on the surface of the cover body 30 facing the housing 110, are arranged at intervals from each other, and are all arranged at intervals from the battery module 200. The plurality of fixing columns 39 all protrude from the surface of the cover body 30 facing the housing 110 towards the housing 110. Each fixing column 39 is provided with a first fixing hole 391. The opening of the first fixing hole 391 is located on the surface of the fixing column 39 facing away from the cover body 30. The first fixing hole 391 is recessed from the surface of the fixing column 39 facing away from the cover body 30 towards the cover body 30.

[0081] Please refer to Figure 14 , Figure 14 which Figure 12 is a schematic structural diagram of the cover body 30 shown after being cut along the B-B position.

[0082] In addition, the cover body 30 is further provided with a boss 30a. The boss 30a is arranged on the bottom side of the cover body 30 and is arranged around the periphery of the cover body 30. The boss 30a is provided with an adhesive groove 301 and a second locking portion 302. Specifically, the opening of the adhesive groove 301 is located on the bottom surface of the boss 30a, and the adhesive groove 301 is arranged around the periphery of the cover body 30. The adhesive groove 301 has a first groove side wall 3011, a second groove side wall 3012 and a groove bottom wall 3013. The first groove side wall 3011 and the second groove side wall 3012 are arranged at intervals and opposite to each other, and the groove bottom wall 3013 is connected between the first groove side wall 3011 and the second groove side wall 3012. The second locking portion 302 is arranged on the second groove side wall 3012. In this embodiment, there are a plurality of second locking portions 302, and the plurality of second locking portions 302 are arranged at intervals around the periphery of the cover body 30. Exemplarily, the second locking portion 302 is a buckle. Specifically, the second locking portion 302 protrudes from the second groove side wall 3012 towards the first groove side wall 3011. In some other embodiments, the second locking portion 302 may also be a clamping groove.

[0083] Please refer to Figure 10 , Figure 11 and Figure 15 , Figure 15 which Figure 11 is a schematic structural diagram of the protection board 20 in the cover body assembly 120 shown.

[0084] In this embodiment, the protection board 20 is installed on one side of the cover body 30 facing the housing 110 and is arranged at intervals from the top surface of the cover body 30. The protection board 20 is provided with a plurality of second fixing holes 21. The plurality of second fixing holes 21 all penetrate through the protection board 20 along the thickness direction of the protection board 20 (the Z-axis direction shown in the figure). Each second fixing hole 21 communicates with the first fixing hole 391 of a fixing column 39. Exemplarily, the protection board 20 may be a Battery Management System (BMS).

[0085] It should be understood that the battery 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 battery pack 210, thereby helping to improve the utilization rate of the battery pack 210 and extend the service life of the battery pack 210. Among them, the communication interface of the battery management system can be a CAN (Controller Area Network) communication interface or an RS-485 (Recommended Standard-485, the electrical characteristic standard of drivers and receivers in a balanced digital multi-point system) communication interface.

[0086] In this embodiment, a plurality of fasteners 10 can all be screws. Each fastener 10 passes through a second fixing hole 21 of the protection plate 20 and a first fixing hole 391 of a fixing column 39, and is fixed to both the protection plate 20 and the fixing column 39 of the cover body 30 to achieve the assembly of the protection plate 20 and the cover body 30. In addition, when the protection plate 20 is installed on the cover body 30, the surfaces of the protection plate 20 and the cover body 30 facing the battery module 200 are spaced apart. In this setting, there is a reserved space between the protection plate 20 and the cover body 30, which can prevent the cover body 30 from getting hot due to the high temperature generated by the protection plate 20 during operation. Additionally, the cover body 30 is usually made of plastic material, and this setting can also prevent the cover body 30 from becoming soft due to the influence of the high temperature of the protection plate 20, thereby ensuring the reliability of the cover body 30 in use.

[0087] It can be understood that the fixation between the protection plate 20 and the cover body 30 is usually achieved by gluing or adhesive bonding. In this embodiment, by using the fasteners 10 to fix the protection plate 20 and the cover body 30, not only is the operation simple and convenient, but also the assembly reliability between the protection plate 20 and the cover body 30 can be improved.

[0088] In addition, the cover body assembly 120 further includes a connection wire harness 120a. The connection wire harness 120a is electrically connected to the protection plate 20. When the cover body assembly 120 is installed on the housing 110, one end of the connection wire harness 120a away from the protection plate 20 is electrically connected to the second lead-out piece 214b of the battery pack 210 in the battery module 200. That is to say, the connection wire harness 120a is electrically connected between the protection plate 20 and the second lead-out piece 214b of the battery module 200 to achieve the electrical connection between the protection plate 20 and the battery module 200, so that the protection plate 20 can play a role in protecting the battery pack 210 of the battery module 200 during the charging process and discharging process of the battery pack 210 of the battery module 200.

[0089] Please refer to again Figure 12。In this embodiment, the switch trigger arm 90 is located within the mating hole 34. Specifically, the switch trigger arm 90 includes a fixed end portion 91 and a movable end portion 92 disposed opposite to the fixed end portion 91. Among them, the fixed end portion 91 is fixedly connected to the wall surface of the mating hole 34. The movable end portion 92 can move relative to the cover body 30 in the thickness direction of the cover body 30.

[0090] Please refer to Figure 16 , Figure 16 is Figure 11 the schematic structural diagram of the switch 80 in the cover assembly 120 shown in the figure.

[0091] The switch 80 is located on the side of the cover body 30 facing the housing 110. The switch 80 includes a fixing plate 81, a light emitting member 82, and a switch button 83. Both the light emitting member 82 and the switch button 83 are fixedly installed on the fixing plate 81. Among them, the fixing plate 81 is fixedly installed on the cover body 30 and is spaced apart from the surface of the cover body 30 facing the housing 110. Exemplarily, the fixing plate 81 can be a circuit board.

[0092] Both the light emitting member 82 and the switch button 83 are located on the side of the fixing plate 81 facing the cover body 30 and are spaced apart from each other. Among them, there are two light emitting members 82. Each light emitting member 82 passes through a light transmission hole 37 so that the light emitted by the light emitting member 82 can be emitted through the light transmission hole 37. Exemplarily, the light emitting member 82 is a light emitting diode (LED).

[0093] In the Z-axis direction, the switch button 83 is correspondingly arranged with the movable end portion 92 of the switch trigger arm 90. In this setting, when the user presses the movable end portion 92 of the switch trigger arm 90, the movable end portion 92 moves relative to the cover body 30 in the thickness direction of the paste towards the direction close to the switch button 83 and contacts the switch button 83, so that the energy storage device 1000 can be turned on or off.

[0094] In addition, when the cover assembly 120 is installed on the housing 110, the fixing plate 81 of the switch 80 is also electrically connected to the battery module 200 in the housing 110. Exemplarily, the fixing plate 81 of the switch 80 can be electrically connected to the battery module 200 through a cable (not shown in the figure) so that the user can turn on or off the energy storage device 1000 by pressing the switch button 83 of the switch 80.

[0095] Please refer to again Figures 9 to 11The positive electrode connection part 40 includes a positive electrode connection terminal 41 and a positive electrode wire harness 42, and the positive electrode wire harness 42 is fixedly connected to the positive electrode connection terminal 41. Among them, the positive electrode connection terminal 41 is fixedly installed in the positive electrode through hole 31. The negative electrode connection part 50 includes a negative electrode connection terminal 51 and a negative electrode wire harness 52, and the negative electrode wire harness 52 is fixedly connected to the negative electrode connection terminal 51. Among them, the negative electrode connection terminal 51 is installed in the negative electrode through hole 32 of the cover body 30. The negative electrode wire harness 52 is electrically connected between the protection board 20 and the negative electrode connection terminal 51, so that the negative electrode connection terminal 51 is electrically connected to the protection board 20.

[0096] The communication component 70 includes a circuit board 71 and two communication interfaces 72, and the two communication interfaces 72 are both fixedly connected to the circuit board 71. Along the Y-axis direction, the two communication interfaces 72 are arranged at intervals. Among them, the communication interface 72 can be a CAN communication interface or an RS-485 communication interface. When the communication component 70 is installed on the cover body 30, the circuit board 71 is located inside the cover body 30. Each communication interface 72 passes through a communication installation hole 38. Exemplarily, the communication interface 72 is fixed to the cover body 30 through a nut. It can be understood that threads are provided on the outer peripheral surface of each communication interface 72. At this time, the communication structure is equivalent to a screw rod. By sleeving the nut on the communication interface 72 and tightening it, the assembly between the communication interface 72 and the cover body 30 can be achieved.

[0097] The handle 60 is installed between the groove walls of the two installation grooves 35 to increase the portability of the energy storage device 1000 and facilitate the user to carry and move the energy storage device 1000. The waterproof and breathable membrane is fixedly installed in the assembly groove 36 and covers the breathable hole 33. The waterproof and breathable membrane not only has a waterproof function, which can prevent moisture in the external environmental air from entering the interior of the protective housing 100 and avoid affecting the performance of the battery module 200, but also has a breathable function to ensure that the function of the breathable hole 33 is not affected.

[0098] Please refer to Figure 2 and Figure 17 , Figure 17 is Figure 1 the schematic cross-sectional structure diagram of the energy storage device 1000 shown after being cut along C-C.

[0099] After the battery module 200 is assembled in the housing 110, the cover body assembly 120 is installed on the top side of the housing 110. At this time, the cover body 30 covers the top side of the housing 110. Among them, the first groove side wall 3011 of the caulking groove 301 of the cover body 30 is spaced from the inner surface of the housing 110. The second groove side wall 3012 of the caulking groove 301 is spaced from the outer surface of the housing 110. The groove bottom wall 3013 of the caulking groove 301 is spaced from the top surface of the housing 110. Each first locking portion 13 and a second locking portion 302 are detachably locked to each other.

[0100] It can be understood that after injecting the sealant into the sealant groove 301, the sealant still needs to be cured. During the curing process of the sealant, the cover body 30 and the housing 110 can be interlocked and fixed by the first locking portion 13 and the second locking portion 302, so that the sealant can be cured, and there is no need to fix the cover body 30 and the housing 110 by a strap anymore, which can prevent the cover body 30 and the housing 110 from separating due to the tension of the sealant, thereby improving the assembly efficiency of the protective housing 100 and reducing the occupied area of the production site, avoiding waste of resources.

[0101] One end of the positive electrode wire harness 42 away from the positive electrode connection terminal 41 is electrically connected to the first lead piece 214a, so as to electrically connect the battery pack 210 and the positive electrode connection terminal 41. In other words, the positive electrode wire harness 42 is electrically connected between the battery module 200 and the positive electrode connection terminal 41. The protection board 20 is disposed at an interval from the battery module 200. It can be understood that by fixedly installing the protection board 20 on the cover body 30, the protection board 20 can be separated from the battery module 200, so that there is a reserved space between the protection board 20 and the battery pack 210, which can prevent the heat generated by the protection board 20 during use from affecting the battery module 200, thereby reducing the heat radiation or heat transfer effect of the protection board 20 on the battery module 200 and ensuring the use reliability of the battery module 200.

[0102] The present application also provides an assembly method for an energy storage device 1000 for preparing the above-mentioned energy storage device 1000.

[0103] Please refer to Figure 18 , Figure 18 is Figure 1 the schematic diagram of the assembly process of the energy storage device 1000 shown.

[0104] Step S1, provide a housing 110, a plurality of batteries 211 and a cover body assembly 120. Among them, the cover body assembly 120 includes a cover body 30 and a protection board 20, and the protection board 20 is fixedly installed on one side in the thickness direction of the cover body 30.

[0105] This step can occur before step S1, or can occur after step S1, and occurs before step S6. The embodiments of the present application do not strictly limit this.

[0106] Step S2, place a plurality of batteries 211 into the housing 110. Among them, the plurality of batteries 211 are arranged in sequence along the length direction of the housing 110.

[0107] Step S3, weld a plurality of electrical connection pieces 213 and two lead pieces 214 to the plurality of batteries 211.

[0108] Step S4, install the pressing member 230 on the top sides of the plurality of batteries 211. Among them, the pressing member 230, the plurality of electrical connection pieces 213, and the two lead-out pieces 214 are arranged at intervals from each other.

[0109] Step S5, fix the pressing member 230 to the housing 110.

[0110] Step S6, install the cover assembly 120 on the top side of the housing 110. Among them, the cover 30 is installed on the top side of the housing 110, the protection plate 20 is located on the side of the cover 30 facing the housing 110, and is spaced from the surface of the cover 30 facing the battery 211, and is also spaced from the plurality of batteries 211.

[0111] It should be noted that in the above assembly process of the energy storage device 1000, the cover 30 and the protection plate 20 can be assembled first to obtain the cover assembly 120, and then the cover assembly 120 and the housing 110 can be assembled. In some other embodiments, the assembly process of the cover 30 and the protection plate 20 can also be carried out simultaneously with Steps S2 to S5, or the assembly process of the cover 30 and the protection plate 20 can also be carried out in the steps after the pressing member 230 is fixed to the housing 110.

[0112] In this embodiment, by arranging the protection plate 20 on the cover 30, the assembly process of components such as the cover 30 and the protection plate 20 can be separated from the assembly process of the housing 110 and the battery 211, so that the entire assembly process of the existing energy storage device 1000 can be split into two production lines, reducing the control points on the two split production lines. On the one hand, it helps to optimize the production process of the energy storage device 1000 and improve the production efficiency of the energy storage device 1000. On the other hand, after the assembly process of the energy storage device 1000 is split, the control points on each production line become fewer, which can also optimize some production processes, reduce production costs, and achieve the purpose of reducing costs and increasing efficiency. At the same time, by using the limiting body 123 and the elastic member 300 in cooperation, the battery module 200 is limited in the length direction, width direction, and height direction of the battery module 200 respectively, so that the battery module 200 can be fixedly installed in the housing 110.

[0113] In addition, the housing 110 of the energy storage device 1000 provided in the present application can be used as a jig for assembling the battery module 200. During the assembly process of the battery module 200, the plurality of batteries 211 can be directly assembled with components such as the plurality of electrical connection pieces 213, the two lead-out pieces 214, and the pressing member 230 in the housing 110, instead of first welding the battery 211 to the electrical connection piece 213 and the lead-out piece 214 and then placing them in the housing 110, which helps to optimize the assembly process of the battery module 200, shorten the assembly time of the battery module 200, and thus is beneficial to improving the production efficiency of the energy storage device 1000.

[0114] 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 by 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 shell, multiple batteries and a cover assembly, wherein the multiple batteries are installed in the shell, and the multiple batteries are arranged in sequence along the length direction of the energy storage device. The cover assembly includes a cover and a protective plate, wherein the cover is installed on the top side of the shell, and the protective plate is fixedly installed on a side of the cover facing the shell, and is spaced apart from a surface of the cover facing the batteries, and is spaced apart from the batteries.

2. The energy storage device according to claim 1, characterized in that: The cover body is provided with a plurality of fixing posts, which are all located on the surface of the cover body facing the shell and are spaced apart from each other, each fixing post is provided with a first fixing hole, and the opening of the first fixing hole is located on the surface of the fixing post away from the cover body; The protection plate is provided with a plurality of second fixing holes, each of which penetrates the protection plate along the thickness direction of the protection plate, and each of the second fixing holes is connected to the first fixing hole of one of the fixing columns; The cover assembly further includes a plurality of fasteners, each of which is inserted through one of the second fixing holes and one of the first fixing holes of the fixing column, and is fixedly connected to both the cover and the protection plate.

3. The energy storage device according to claim 1 or 2, characterized in that: The cover body is provided with a positive through hole and a negative through hole, the positive through hole and the negative through hole both penetrate the cover body in the thickness direction of the cover body and are arranged at intervals from each other, and along the width direction of the cover body, the positive through hole and the negative through hole are both located on the same side of the cover body; The cover assembly also includes a positive connection part and a negative connection part, the positive connection part includes a positive connection terminal and a positive wiring harness, the positive connection terminal is installed in the positive through hole, and the positive wiring harness is electrically connected between the positive connection terminal and the battery, the negative connection part includes a negative connection terminal and a negative wiring harness, the negative connection terminal is installed in the negative through hole, and the negative wiring harness is electrically connected between the negative connection terminal and the protective plate.

4. The energy storage device according to claim 1, characterized in that: The shell comprises a bottom shell and a side shell, wherein the side shell is arranged around the edge of the bottom shell and is fixedly connected to the bottom shell, and the side shell is provided with a limiting body, which is located on the surface of the side shell facing the battery and abuts against the battery.

5. The energy storage device according to claim 4, characterized in that: The energy storage device further comprises a plurality of elastic members, wherein the plurality of elastic members are all located in the shell and clamped between the limiting body and the plurality of batteries.

6. The energy storage device according to claim 4 or 5, characterized in that: The limiting body includes a guide surface, which is located on the side of the limiting body away from the bottom shell. The guide surface includes a first side close to the battery and a second side arranged opposite to the first side. In the direction from the second side to the first side, the distance between the guide surface and the bottom shell gradually decreases.

7. The energy storage device according to claim 6, characterized in that: Along the height direction of the energy storage device, surfaces of the plurality of batteries facing away from the bottom shell are located on a side of the first side facing away from the bottom shell.

8. The energy storage device according to claim 4, characterized in that: The limiting body includes two first limiting parts and two second limiting parts, and the two first limiting parts and the two second limiting parts are arranged at intervals from each other. Along the length direction of the energy storage device, the two first limiting parts are respectively located on the opposite sides of the plurality of batteries and can both abut against the batteries. Along the width direction of the energy storage device, the two second limiting parts are respectively located on the opposite sides of the plurality of batteries and can both abut against the batteries.

9. The energy storage device according to claim 8, characterized in that: Each of the first limiting portions includes a first sub-limiting portion and two second sub-limiting portions. Along the width direction of the energy storage device, the first sub-limiting portion and the two second sub-limiting portions are spaced apart from each other, and the first sub-limiting portion is located between the two second sub-limiting portions. Along the length direction of the energy storage device, the first sub-limiting portion is spaced apart from and opposite to the battery, and the two second sub-limiting portions are both in contact with the battery.

10. The energy storage device according to claim 8 or 9, characterized in that: Each of the first limiting portions is provided with a first mounting hole, and the opening of the first mounting hole is located on the surface of the first limiting portion away from the bottom shell; The energy storage device further includes a pressing member, which is mounted on a side of the plurality of batteries away from the bottom shell and is located on a side of the first limiting portion away from the bottom shell, and the pressing member is provided with a plurality of second mounting holes, the plurality of second mounting holes penetrate the pressing member along a thickness direction of the pressing member, and are spaced apart from each other, and each of the second mounting holes is connected to one of the first mounting holes; The energy storage device further includes a plurality of fixing members, each of which is passed through one of the second mounting holes and one of the first mounting holes, and is fixed to both the pressing member and the first limiting portion.

11. The energy storage device according to claim 10, characterized in that: The clamping member is provided with a plurality of avoidance holes, and the plurality of avoidance holes all penetrate the clamping member along the thickness direction of the clamping member, and are spaced apart from each other and spaced apart from the plurality of second mounting holes, and each of the avoidance holes is arranged opposite to an explosion-proof valve of the battery.

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