energy storage device

Abstract

The utility model relates to the technical field of energy storage, especially energy storage device, the energy storage device includes accommodating box body and battery module, accommodating box body has the accommodation space, the accommodation space has two inner end faces of opposite setting along the first direction and is located the open mouth of second direction one side, the first direction and second direction exist the included angle, at least one of two inner end faces is provided with the first cooperation structure, and the battery module is stored in the accommodation space, and the both ends of battery module along the first direction are provided with end plate respectively, at least one of two outer end faces of two end plates opposite setting is provided with the second cooperation structure, and the first cooperation structure and second cooperation structure along the second direction slide fit, when needing to put battery module into the accommodation space, using the slide fit of first cooperation structure and second cooperation structure, can quickly put battery module from the open mouth of accommodation space along the second direction into the accommodation space, not only reduces the difficulty of battery module's into the box, improves the into the box efficiency of battery module.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to energy storage devices. Background Technology

[0002] The battery pack includes a housing and multiple battery modules. The housing has an internal cavity for accommodating the battery modules to achieve safe storage of the battery modules.

[0003] In related technologies, to prevent battery modules from moving horizontally within the internal cavity, a cross-shaped steel frame is welded into the cavity to divide the storage space into multiple compartments adapted to individual battery modules, allowing one battery module to be placed in each compartment. This cross-shaped steel frame solution requires a fixture to clamp each battery module during insertion. The elasticity of the insulating foam between the cells within the battery module is used to "flatten" the module, reducing its size. The bottom of the battery module then extends partially into the storage space. After releasing the fixture, the insulating foam elastically returns to its original position, and the battery module abuts against the side wall of the storage space. The battery module is then pressed down, squeezing it into the storage space. If the battery module's vertical dimensions are large, it is prone to horizontal displacement during insertion, leading to insertion failure. Furthermore, the cross-shaped steel frame inside the battery box occupies a significant amount of storage space, reducing energy density.

[0004] Therefore, there is an urgent need to invent energy storage devices to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an energy storage device to enable rapid insertion of battery modules into the battery box, ensuring the battery box's ability to secure the battery modules while increasing energy density.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Energy storage device, including:

[0008] A receiving box having a receiving space, the receiving space having two inner end faces arranged opposite each other along a first direction and an opening located on one side of a second direction, the first direction and the second direction forming an angle, and at least one of the two inner end faces being provided with a first mating structure; and

[0009] A battery module is stored in the accommodating space. The battery module has end plates at both ends along the first direction. At least one of the two outer end faces of the two end plates that are arranged opposite to each other is provided with a second mating structure.

[0010] The first mating structure and the second mating structure slide together along the second direction.

[0011] As an optional solution, the first mating structure includes a first mating protrusion and / or a first mating groove, wherein the first mating protrusion extends out of the corresponding inner end face and extends along the second direction, and the first mating groove retracts into the corresponding inner end face and extends along the second direction;

[0012] The second mating structure includes a second mating protrusion and / or a second mating groove, wherein the second mating protrusion extends out of the corresponding outer end face and extends along the second direction, and the second mating groove retracts into the corresponding outer end face and extends along the second direction;

[0013] The first mating protrusion slides into the second mating groove, and the first mating groove slides into the second mating protrusion.

[0014] As an optional solution, the first mating structure has a plurality of first mating protrusions arranged sequentially along a third direction and / or a plurality of first mating grooves arranged sequentially along a third direction.

[0015] The second mating structure has a plurality of second mating protrusions arranged sequentially along the third direction and / or a plurality of second mating grooves arranged sequentially along the third direction;

[0016] There are included angles between each pair of the first direction, the second direction, and the third direction.

[0017] As an optional solution, the projection of the first mating protrusion and / or the second mating groove along the second direction is a semi-circle or a polygon;

[0018] The projection of the first mating groove and / or the second mating protrusion along the second direction is circular or polygonal.

[0019] As an optional solution, the housing includes:

[0020] Supporting base plate; and

[0021] Two limiting side plates are respectively located above the supporting base plate. The two limiting side plates are arranged opposite each other along the first direction and are respectively located at both ends of the supporting base plate along the first direction. The two limiting side plates and the supporting base plate together form the receiving space. The two opposite end faces of the two limiting side plates are the inner end faces.

[0022] As an optional solution, the housing further includes:

[0023] A connecting strip extends along the first direction and is configured to securely connect the two limiting side plates from one side of the supporting base plate along the first direction.

[0024] As an optional solution, the housing has at least two connecting straps, which are located on both sides of the limiting side plate along the first direction, and the at least two connecting straps are fixedly connected to the two limiting side plates respectively.

[0025] Alternatively, at least two of the connecting straps are located on the same side of the limiting side plate along the first direction and are spaced apart along the vertical direction, and at least two of the connecting straps are respectively fixedly connected to the two limiting side plates.

[0026] As an optional solution, a liquid cooling channel is formed in the supporting base plate, and the supporting base plate has a liquid inlet connector and a liquid outlet connector. The liquid inlet connector and the liquid outlet connector are respectively installed at the two ends of the liquid cooling channel.

[0027] As an optional solution, the end plate has a weight-reducing cavity, and the weight-reducing cavity is provided with a reinforcing structure.

[0028] As an optional solution, at least one of the two inner plate surfaces of the two end plates disposed opposite each other is provided with an extension boss, the extension boss extending out of the corresponding inner plate surface, and the lower end surface of the extension boss being configured to abut against the upper end surface of the cell in the battery module.

[0029] The beneficial effects of this utility model are:

[0030] The energy storage device provided by this utility model has a housing space for storing battery modules within a housing. A first mating structure is provided on at least one of two inner end faces arranged opposite each other along a first direction within the housing space. End plates are respectively provided at both ends of the battery module along the first direction. A second mating structure is provided on at least one of two outer end faces of the two end plates arranged opposite each other along the first direction. An opening is provided on one side of the housing space along a second direction. Utilizing the angle between the first and second directions, the first and second mating structures are ensured to slide smoothly into the housing space along the second direction. When the battery module needs to be placed into the housing space, the sliding fit of the first and second mating structures allows the battery module to slide quickly from the opening into the housing space along the second direction, reducing the difficulty of placing the battery module and improving the efficiency of battery module placement. Moreover, the housing space is only used to accommodate battery modules, significantly improving the space utilization rate and increasing energy density. In addition, when the battery module is housed in the housing space, the first mating structure and the second mating structure can also achieve horizontal positioning and fixation of the battery module and the housing, ensuring the fixation effect of the battery module and the housing. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the energy storage device provided in an embodiment of the present invention;

[0032] Figure 2 This is a structural schematic diagram of the limiting side plate and the supporting bottom plate provided in this embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the end plate provided in an embodiment of the present utility model;

[0035] Figure 5 yes Figure 1 A magnified view of a portion of point A in the middle.

[0036] In the picture:

[0037] 100. Housing; 110. Limiting side plate; 111. First mating protrusion; 112. First mating groove; 113. Weight reduction through hole; 120. Supporting base plate; 121. Liquid inlet connector; 122. Liquid outlet connector; 130. Connecting strap; 140. Fixing component;

[0038] 200. Battery module; 210. End plate; 211. Second mating protrusion; 212. Second mating groove; 213. Extension boss; 220. Battery cell. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] The battery pack includes a housing and multiple battery modules. The housing has an inner cavity for safely storing the battery modules. To prevent horizontal movement of the battery modules within the cavity, a cross-shaped steel frame is welded into the cavity to divide the housing space into multiple compartments adapted to individual battery modules, allowing one battery module to be placed in each compartment. When placing the battery modules into the housing, a fixture is used to clamp each module. The elasticity of the insulating foam between the battery cells flattens the module, reducing its size. The bottom of the module then extends partially into the housing. After releasing the fixture, the insulating foam elastically returns to its original position, and the module abuts against the side wall of the housing. Finally, the module is pressed down, squeezing it into the housing. If the battery module is large in the vertical direction, it is prone to horizontal displacement when being pressed into the battery box, causing the battery module to fail to fit. Furthermore, the cross-shaped steel frame inside the battery box occupies a significant amount of storage space, reducing energy density.

[0044] To solve the above problems, such as Figures 1-3As shown, this embodiment provides an energy storage device. The energy storage device includes a housing 100 and a battery module 200. The housing 100 has a housing space with two inner end faces arranged opposite each other along a first direction and an opening located on one side of a second direction. The first direction and the second direction form an angle. At least one of the two inner end faces is provided with a first mating structure. The battery module 200 is stored in the housing space. End plates 210 are respectively provided at both ends of the battery module 200 along the first direction. At least one of the two outer end faces of the two end plates 210 arranged opposite each other is provided with a second mating structure. The first mating structure and the second mating structure are slidably engaged along the second direction.

[0045] This energy storage device provides a storage space for battery modules 200 within a housing 100. A first mating structure is provided on at least one of two inner end faces facing each other along a first direction within the storage space. End plates 210 are provided at both ends of the battery module 200 along the first direction, and a second mating structure is provided on at least one of two outer end faces of the two end plates 210 facing away from each other along the first direction. An opening is provided on one side of the storage space along a second direction. Utilizing the angle between the first and second directions, the first and second mating structures slide together along the second direction. When the battery module 200 needs to be placed into the storage space, the sliding engagement of the first and second mating structures allows the battery module 200 to slide quickly from the opening into the storage space along the second direction, reducing the difficulty of placing the battery module 200 and improving its efficiency. Furthermore, since the storage space is solely for the battery module 200, the space utilization rate is significantly improved, increasing energy density. In addition, when the battery module 200 is housed in the housing space, the first mating structure and the second mating structure can also achieve horizontal positioning and fixation of the battery module 200 and the housing 100, ensuring the fixation effect of the battery module 200 and the housing 100.

[0046] It should be noted that in this embodiment, the first direction is the front-to-back direction, and the second direction is the up-to-down direction, with the first and second directions perpendicular to each other. In other embodiments, the specific directions of the first and second directions can be adjusted according to actual needs; this embodiment does not impose specific limitations.

[0047] Furthermore, in this embodiment, both inner end faces of the housing 100 arranged opposite each other along the first direction are provided with a first mating structure, and both outer end faces of the battery module 200 arranged opposite each other along the first direction are provided with a second mating structure. In other embodiments, the first mating structure may be provided only on one of the inner end faces of the two inner end faces arranged opposite each other within the housing 100, and the second mating structure may be provided only on one of the outer end faces of the two outer end faces arranged opposite each other within the battery module 200. This embodiment does not impose specific limitations.

[0048] As an optional solution, such as Figures 2-5 As shown, the first mating structure includes a first mating protrusion 111 and / or a first mating groove 112. The first mating protrusion 111 extends out of its corresponding inner end face and extends along the second direction, while the first mating groove 112 retracts to its corresponding inner end face and extends along the second direction. The second mating structure includes a second mating protrusion 211 and / or a second mating groove 212. The second mating protrusion 211 extends out of its corresponding outer end face and extends along the second direction, while the second mating groove 212 retracts to its corresponding outer end face and extends along the second direction. The first mating protrusion 111 and the second mating groove 212 are in sliding engagement, and the first mating groove 112 and the second mating protrusion 211 are in sliding engagement. By making the first mating structure include a first mating protrusion 111 extending from the corresponding inner end face and along the second direction and / or a first mating groove 112 retracting from the corresponding inner end face and extending along the second direction, and making the second mating structure include a second mating protrusion 211 extending from the corresponding outer end face and along the second direction and / or a second mating groove 212 retracting from the corresponding outer end face and extending along the second direction, the first mating protrusion 111 and the second mating groove 212 slide in the second direction and the first mating groove 112 and the second mating protrusion 211 slide in the second direction, so as to achieve the effect of the battery module 200 sliding into the receiving space along the second direction.

[0049] It should be noted that, in this embodiment, the first mating structure includes both a first mating protrusion 111 and a first mating groove 112, and the second mating structure includes both a second mating protrusion 211 and a second mating groove 212. In other embodiments, the first mating structure may include only the first mating protrusion 111, and the second mating structure may include only the second mating groove 212, or vice versa. This embodiment does not impose any specific limitations.

[0050] To further improve the sliding fit effect between the first and second mating structures, the first mating structure has multiple first mating protrusions 111 and / or multiple first mating grooves 112 arranged sequentially along a third direction. The second mating structure has multiple second mating protrusions 211 and / or multiple second mating grooves 212 arranged sequentially along a third direction. An angle exists between each pair of the first, second, and third directions. It should be noted that in this embodiment, the first direction is the front-back direction, the second direction is the up-down direction, and the third direction is the left-right direction. The first mating structure has four first mating protrusions 111 and four first mating grooves 112, and the first mating protrusions 111 and first mating grooves 112 are staggered along the left-right direction. The second mating structure has four second mating protrusions 211 and four second mating grooves 212, and the second mating protrusions 211 and second mating grooves 212 are staggered along the left-right direction. In other embodiments, the specific values ​​and arrangement of the first mating protrusion 111 and the first mating groove 112 in the first mating structure can be adjusted according to actual needs, as can the specific number and arrangement of the second mating protrusion 211 and the second mating groove 212 in the second mating structure. This embodiment does not impose specific limitations.

[0051] Optionally, the projections of the first mating protrusion 111 and / or the second mating groove 212 along the second direction are semicircular or polygonal, and the projections of the first mating groove 112 and / or the second mating protrusion 211 along the second direction are circular or polygonal. It should be noted that in this embodiment, the projections of the first mating protrusion 111 and the second mating groove 212 along the second direction are isosceles trapezoids. In other embodiments, the projection shapes of the first mating protrusion 111 and the second mating groove 212 along the second direction can be adaptively adjusted according to actual needs; this embodiment does not impose specific limitations.

[0052] Furthermore, the end plate 210 has a weight-reducing cavity with a reinforcing structure. By creating a weight-reducing cavity within the end plate 210 and installing a reinforcing structure within it, the weight of the end plate 210 can be reduced while maintaining its structural strength, thus meeting lightweight design requirements. It should be noted that in this embodiment, the reinforcing structure is a reinforcing rib, extending along a second direction, and its two outer sidewalls along a first direction are respectively connected to the two inner sidewalls of the weight-reducing cavity along the first direction, thereby improving the structural strength of the end plate 210. In this embodiment, ten reinforcing ribs are spaced apart along a third direction within the weight-reducing cavity to further enhance the structural strength of the end plate 210. In other embodiments, the specific number of reinforcing ribs can be adaptively adjusted according to actual needs; this embodiment does not impose a specific limitation.

[0053] Combination Figure 1 and Figure 2 The specific structure of the housing 100 is described below. The housing 100 includes a supporting base plate 120 and two limiting side plates 110. The two limiting side plates 110 are respectively located above the supporting base plate 120. The two limiting side plates 110 are arranged opposite each other along a first direction and are respectively located at both ends of the supporting base plate 120 along the first direction. The two limiting side plates 110 and the supporting base plate 120 together form a housing space. The two opposite end faces of the two limiting side plates 110 are inner end faces to realize the housing and storage of the battery module 200.

[0054] To improve the structural strength of the housing 100, the housing 100 also includes a connecting strip 130, wherein the connecting strip 130 extends along a first direction and is configured to fix two limiting side plates 110 from one side of the supporting base plate 120 along the first direction.

[0055] Specifically, such as Figure 5 As shown, the housing 100 also includes a fastener 140, which is used to detachably fix the connecting strap 130 and the limiting side plate 110. By using the fastener 140 to detachably fix the connecting strap 130 and the limiting side plate 110 together, not only can the relative distance between the two limiting side plates 110 be adjusted according to actual needs, but it also facilitates subsequent inspection and maintenance of the connecting strap 130. It should be noted that in this embodiment, the fastener 140 is a bolt. The bolt connecting strap 130 has a threaded through hole that mates with the bolt, and the limiting side plate 110 has a threaded blind hole that mates with the bolt thread, so that the bolt thread-fixes the connecting strap 130 and the limiting side plate 110. In addition, to ensure the fixing effect of the connecting strap 130 and the limiting side plate 110, the limiting side plate 110 and the connecting strap 130 are fixed together by two bolts. In other embodiments, the specific number of bolts can also be adjusted according to actual needs; this embodiment does not impose a specific limitation.

[0056] Optionally, the receiving box 100 has at least two connecting straps 130, which are respectively located on both sides of the limiting side plate 110 along the first direction, and are respectively fixedly connected to the two limiting side plates 110. By respectively setting at least two connecting straps 130 on both sides of the limiting side plate 110 along the first direction, and fixing the two limiting side plates 110 with the at least two connecting straps 130, the structural strength of the receiving box 100 can be further improved. It should be noted that in this embodiment, the receiving box 100 has two connecting straps 130, which are respectively located on both sides of the limiting side plate 110 along the first direction, and are respectively fixedly connected to the two limiting side plates 110. In other embodiments, the specific number of connecting straps 130 can also be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0057] In addition, in other embodiments, the housing 100 may have at least two connecting straps 130, and the at least two connecting straps 130 are located on the same side of the limiting side plate 110 along the first direction and are spaced apart along the second direction. The at least two connecting straps 130 are respectively fixedly connected to the two limiting side plates 110. This embodiment does not make specific limitations.

[0058] As an optional solution, the limiting side plate 110 has a weight-reducing through hole 113 to reduce the weight of the housing 100 while ensuring the structural strength of the limiting side plate 110, thus meeting the design requirements for lightweighting.

[0059] In one of the alternative solutions, such as Figure 1 and Figure 2 As shown, a liquid cooling channel is formed within the support base plate 120. The support base plate 120 has a liquid inlet connector 121 and a liquid outlet connector 122. The liquid cooling channel has a liquid inlet connector 121 and a liquid outlet connector 122 installed at both ends of the liquid cooling channel. By forming a liquid cooling channel within the support base plate 120 and installing a liquid inlet connector 121 and a liquid outlet connector 122 at both ends of the liquid cooling channel, the coolant can enter and exit within the liquid cooling channel. The coolant is used to cool and dissipate heat from the battery module 200 on the support base plate 120, thereby improving the safety of the battery module 200 in use.

[0060] In an alternative embodiment, such as Figure 3 As shown, the battery module 200 includes multiple battery cells 220 and two end plates 210. The multiple battery cells 220 are stacked together in sequence along the second direction. The end plates 210 are disposed at both ends of the assembly composed of multiple battery cells 220 along the first direction to clamp and fix the assembly composed of multiple battery cells 220.

[0061] To further improve the clamping effect of the end plate 210 on the battery cell 220, such as Figure 4 and Figure 5As shown, at least one of the two inner plate surfaces of the two end plates 210, which are arranged opposite each other, is provided with an extension boss 213. The extension boss 213 extends out of the corresponding inner plate surface, and the lower end surface of the extension boss 213 is configured to abut against the upper end surface of the battery cell 220 in the battery module 200. By providing an extension boss 213 on at least one of the two inner plate surfaces of the two end plates 210, the lower end surface of the extension boss 213 extending out of the inner plate surface abuts against the upper end surface of the battery cell 220, thereby limiting the upward movement of the battery cell 220, so that the end plate 210 can be directly aligned with the battery cell 220, ensuring the clamping effect of the end plate 210 on the battery cell 220. It should be noted that in this embodiment, both inner plate surfaces of the two end plates 210 are provided with extension bosses 213. In other embodiments, extension bosses 213 may be provided on only one inner plate surface; this embodiment does not impose a specific limitation.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An energy storage device, characterized in that, include: The container (100) has a receiving space, the receiving space has two inner end faces arranged opposite each other along a first direction and an opening located on one side of a second direction, the first direction and the second direction having an angle, and at least one of the two inner end faces is provided with a first mating structure; as well as A battery module (200) is stored in the accommodating space. The battery module (200) has end plates (210) at both ends along the first direction. At least one of the two outer end faces of the two end plates (210) that are arranged opposite to each other is provided with a second mating structure. The first mating structure and the second mating structure slide together along the second direction.

2. The energy storage device according to claim 1, characterized in that, The first mating structure includes a first mating protrusion (111) and / or a first mating groove (112), wherein the first mating protrusion (111) extends out of the corresponding inner end face and extends along the second direction, and the first mating groove (112) retracts into the corresponding inner end face and extends along the second direction; The second mating structure includes a second mating protrusion (211) and / or a second mating groove (212), wherein the second mating protrusion (211) extends out of the corresponding outer end face and extends along the second direction, and the second mating groove (212) retracts into the corresponding outer end face and extends along the second direction; The first mating protrusion (111) and the second mating groove (212) are slidably engaged.

3. The energy storage device according to claim 2, characterized in that, The first mating structure has a plurality of first mating protrusions (111) arranged sequentially along a third direction and / or a plurality of first mating grooves (112) arranged sequentially along a third direction; The second mating structure has a plurality of second mating protrusions (211) arranged sequentially along the third direction and / or a plurality of second mating grooves (212) arranged sequentially along the third direction; There are included angles between each pair of the first direction, the second direction, and the third direction.

4. The energy storage device according to claim 3, characterized in that, The projection of the first mating protrusion (111) and / or the second mating groove (212) along the second direction is a semicircle or a polygon; The projection of the first mating groove (112) and / or the second mating protrusion (211) along the second direction is circular or polygonal.

5. The energy storage device according to any one of claims 1 to 4, characterized in that, The housing (100) includes: Supporting base plate (120); and Two limiting side plates (110) are respectively located above the supporting base plate (120). The two limiting side plates (110) are arranged opposite each other along the first direction and are respectively located at both ends of the supporting base plate (120) along the first direction. The two limiting side plates (110) and the supporting base plate (120) together form the receiving space. The two opposite end faces of the two limiting side plates (110) are the inner end faces.

6. The energy storage device according to claim 5, characterized in that, The housing (100) also includes: A connecting strip (130) extends along the first direction and is configured to securely connect the two limiting side plates (110) from one side of the supporting base plate (120) along the first direction.

7. The energy storage device according to claim 6, characterized in that, The housing (100) has at least two connecting straps (130), which are located on both sides of the limiting side plate (110) along the first direction, and the at least two connecting straps (130) are fixedly connected to the two limiting side plates (110). Alternatively, at least two of the connecting strips (130) are located on the same side of the limiting side plate (110) along the first direction and are spaced apart along the second direction, and at least two of the connecting strips (130) are respectively fixedly connected to the two limiting side plates (110).

8. The energy storage device according to claim 5, characterized in that, The supporting base plate (120) has a liquid cooling channel, and the supporting base plate (120) has a liquid inlet connector (121) and a liquid outlet connector (122). The liquid inlet connector (121) and the liquid outlet connector (122) are respectively installed at the two ends of the liquid cooling channel.

9. The energy storage device according to any one of claims 1 to 4, characterized in that, The end plate (210) has a weight-reducing cavity, and the weight-reducing cavity is provided with a reinforcing structure.

10. The energy storage device according to any one of claims 1 to 4, characterized in that, At least one of the two inner plate surfaces of the two end plates (210) is provided with an extension boss (213), the extension boss (213) extends out of the corresponding inner plate surface, and the lower end surface of the extension boss (213) is configured to abut against the upper end surface of the cell (220) in the battery module (200).

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