energy storage system

Abstract

The application discloses an energy storage system, comprising a first module, a second module and a fixing assembly, the first module comprises a first shell, the first shell comprises a first wall, the second module comprises a second shell, the second shell comprises a second wall, the first module and the second module are electrically connected, at least one of the first module and the second module comprises a battery cell assembly. The fixing assembly connects the first wall and the second wall, comprising a first protrusion, a second protrusion, a through slot, a cover body and a shaft body, the through slot is arranged on at least one of the first protrusion and the second protrusion, the cover body and the shaft body are connected with each other, the cover body connects the first protrusion and the second protrusion, part of the shaft body is arranged in the through slot and connected with at least one of the first protrusion and the second protrusion, which is beneficial to simplify the assembly process of the fixing assembly connecting the first module and the second module and save the installation cost of the energy storage system.

Description

Technical Field

[0001] This application belongs to the field of energy storage technology, and specifically relates to an energy storage system. Background Technology

[0002] In energy storage systems formed by stacking multiple energy storage modules, fastening mechanisms, such as bolts, are usually used to connect the shells of adjacent energy storage modules in order to ensure the stability of the stack. However, this will affect the assembly efficiency of the energy storage system, resulting in higher installation costs and impacting the competitiveness of the product. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide an energy storage system that simplifies the assembly process and saves installation costs.

[0004] Embodiments of this application provide an energy storage system including a first module, a second module, and a fixing assembly. The second module and the first module are stacked along a first direction. The first module includes a first housing, which includes a first wall. The second module includes a second housing, which includes a second wall. The second wall and the first wall are arranged along the first direction. The first module and the second module are electrically connected. At least one of the first module and the second module includes a battery cell assembly. The fixing assembly connects the first wall and the second wall. The fixing assembly includes a first protrusion, a second protrusion, a through groove, a cover, and a shaft. The through groove is provided in at least one of the first protrusion and the second protrusion. Both the first protrusion and the second protrusion extend along a second direction, which is perpendicular to the first direction. The cover and the shaft are interconnected. The cover connects the first protrusion and the second protrusion. A portion of the shaft is provided in the through groove and connects to at least one of the first protrusion and the second protrusion.

[0005] In the aforementioned energy storage system, after the second module and the first module are stacked, the first wall and the second wall are connected by a fixing component, and the cover connects the first protrusion and the second protrusion. A portion of the shaft is provided in the through groove and connects to at least one of the first protrusion and the second protrusion, so that the cover restricts the relative movement between the first protrusion and the second protrusion, thereby restricting the relative movement between the first housing and the second housing, and restricting the relative movement between the first module and the second module. This helps to simplify the assembly process of connecting the first module and the second module with the fixing component and saves the installation cost of the energy storage system.

[0006] In some embodiments of this application, the first protrusion is connected to the first wall, and the second protrusion is connected to the second wall. The cover restricts the relative movement between the first protrusion and the second protrusion, thereby restricting the relative movement between the first wall and the second wall, and restricting the relative movement between the first module and the second module. This helps to simplify the assembly process of connecting the fixed components to the first module and the second module, and saves the installation cost of the energy storage system.

[0007] In some embodiments of this application, the shaft includes an extension and a limiting portion, with the extension connecting the cover and the limiting portion. The through-slot includes a first region and a second region that are interconnected. The first region is configured to allow the limiting portion to pass through, and the second region is configured to restrict the passage of the limiting portion. The first and second regions are also configured to allow the extension to move between the first and second regions. The extension and the limiting portion can extend into or exit the through-slot through the first region, and when the extension and the limiting portion move to the second region, the second region can restrict the passage of the limiting portion, thereby preventing the shaft from leaving the through-slot in a second direction.

[0008] In some embodiments of this application, the fixing component has a first unlocked position and a first locked position relative to the first wall and the second wall. When the fixing component is in the first unlocked position, the extension is located in the first region, at which time the extension and the limiting part can leave the through groove from the first region. When the fixing component is in the first locked position, the extension is located in the second region, at which time the second region can restrict the passage of the limiting part, thereby restricting the shaft from leaving the through groove in the second direction.

[0009] In some embodiments of this application, the through-slot further includes a third region connecting the first and second regions. The third region is configured to allow the extension to pass through, enabling the extension to move between the first and second regions. Along a first direction, at least a portion of the third region extends beyond the second region. By providing the third region, the through-slot helps restrict the movement of the shaft within the second region, reducing the risk of separation between the cover and the first or second protrusion, improving the connection stability between the first and second modules, and enhancing the seismic performance of the energy storage system.

[0010] In some embodiments of this application, the first protrusion has a first cavity and a first opening that communicate with each other, and the second protrusion has a second cavity and a second opening that communicate with each other, the second opening and the first opening facing each other along a first direction. The fixing assembly also includes a connector, which includes a first part and a second part that communicate with each other, a portion of the first part located in the first cavity, a portion of the first part located in the second cavity, and the second part extending out from the first protrusion and the second protrusion. The second part is configured to connect to an external structure, which is beneficial for connecting and installing the energy storage system to the external structure, and also helps to reduce the number of accessories on the energy storage system for connecting to the external structure, and simplifies the connection process between the energy storage system and the external structure, thereby saving the installation cost of the energy storage system.

[0011] In some embodiments of this application, the limiting portion contacts the connecting member, which helps to restrict the movement of the connecting member relative to the first protrusion or the second protrusion, improves the stability of the connection between the connecting member and the first protrusion and the second protrusion, and improves the connection stability between the energy storage system and the external structure.

[0012] In some embodiments of this application, the cover is provided with a groove, at least a portion of the shaft is disposed in the groove, and at least a portion of the first protrusion and at least a portion of the second protrusion are disposed in the groove. The cover restricts the relative movement between the first protrusion and the second protrusion through the groove, thereby restricting the relative movement between the first housing and the second housing, and restricting the relative movement between the first module and the second module. This helps to simplify the assembly process of connecting the first module and the second module with the fixing components, and saves the installation cost of the energy storage system.

[0013] In some embodiments of this application, the fixing component further includes a gasket disposed within a groove and connected to the cover. The gasket contacts and connects the first protrusion and the second protrusion, which helps to increase the friction between the cover and the first protrusion, and between the second protrusion, suppressing the rotation of the cover relative to the first and second protrusions, reducing the risk of separation between the cover and the first and second protrusions, improving the connection stability between the first module and the second module, and improving the seismic performance of the energy storage system. The gasket also helps to compensate for the dimensional tolerances of the cover and the first and second protrusions along the second direction, restricting the movement of the cover relative to the first and second protrusions in the second direction and in the opposite direction of the second direction, improving the connection stability between the first module and the second module, and improving the seismic performance of the energy storage system.

[0014] In some embodiments of this application, the second protrusion is provided with a through hole that extends through the second protrusion. The through hole can serve as a drainage hole, allowing liquid accumulated inside the second protrusion to drain out and reducing liquid accumulation inside the second protrusion.

[0015] In some embodiments of this application, the energy storage system also includes a handle detachably connected to the second protrusion. When the energy storage system needs to be moved, the handle is connected to the second protrusion to facilitate the movement of the energy storage system; after the movement is completed, the handle can be detached from the second protrusion, which helps to reduce the impact of the handle on the outline of the energy storage system.

[0016] In some embodiments of this application, when the handle is connected to the second protrusion, a portion of the handle is located in the through hole, which simplifies the connection process between the handle and the second protrusion and also facilitates the removal of the handle.

[0017] In some embodiments of this application, the second housing includes a first conductive portion and a first insulating layer. The first insulating layer is disposed on a portion of the surface of the first conductive portion, and a portion of the first conductive portion is exposed on the first insulating layer. The exposed portion of the first conductive portion is configured to be electrically connected to the ground or an external device, so that the second housing and the ground or other external device are at the same potential, which is beneficial to improving the safety performance of the energy storage system.

[0018] In some embodiments of this application, the shaft includes an extension and a limiting portion connected to each other. The extension connects the limiting portion and the cover, and the extension is located in a through groove configured to restrict the passage of the limiting portion. The fixing component has a second unlocked position and a second locked position relative to the first wall and the second wall. When the fixing component is in the second unlocked position, the projection of the cover and the projection of the second protrusion do not overlap along the second direction. When the fixing component is in the second locked position, the projection of the cover and the projection of the second protrusion overlap along the second direction. The portion of the cover passing through the shaft is located in the through groove, achieving a connection that does not disengage from the first or second protrusion, which helps reduce the risk of loss of the fixing component. Furthermore, by moving the cover relative to the first and second protrusions, the fixing component can move between the second unlocked position and the second locked position to lock or unlock the first module and the second module, facilitating operation and saving on the installation and dismantling costs of the energy storage system.

[0019] In some embodiments of this application, the first housing further includes a first bottom wall connected to the first wall; the second housing further includes a second top wall connected to the second wall, and the second top wall and the first bottom wall are arranged along a first direction; the first module further includes a first connecting terminal disposed on the first bottom wall; the second module further includes a second connecting terminal disposed on the second top wall and connected to the first connecting terminal. The first module and the second module are electrically connected through the connection between the first connecting terminal and the second connecting terminal.

[0020] In some embodiments of this application, the first bottom wall is further provided with a first recess, which is recessed along a first direction; the second top wall is further provided with a third protrusion, which extends along the first direction, and at least a portion of the third protrusion is located within the first recess. When stacking the first module and the second module, the connection between the third protrusion and the first recess can serve as a guide, guiding the stacking of the first module and the second module, which helps to simplify the installation of the energy storage system, improve the connection accuracy between the first module and the second module, and the fact that at least a portion of the third protrusion is located within the first recess can also serve as a limiting function, restricting the relative movement between the first module and the second module along a direction perpendicular to the first direction, thereby improving the seismic performance of the energy storage system.

[0021] In some embodiments of this application, the third protrusion extends beyond the second connecting terminal along the first direction. The third protrusion can protect the second connecting terminal, reducing the risk of the second connecting terminal being damaged by external objects in a direction opposite to the first direction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the energy storage system in one embodiment of this application.

[0023] Figure 2 This is an exploded view of an energy storage system in one embodiment of this application.

[0024] Figure 3 This is a view of a portion of the energy storage system structure in the opposite direction to the second direction in one embodiment of this application.

[0025] Figure 4 yes Figure 3 A magnified view of a portion of region IV.

[0026] Figure 5 This is a view of a portion of the energy storage system in an exploded state, taken in the opposite direction to the second direction, according to one embodiment of this application.

[0027] Figure 6 yes Figure 5 A magnified view of a portion of the VI region.

[0028] Figure 7 This is a structural schematic diagram of the fixed component part in one embodiment of this application.

[0029] Figure 8 This is an exploded view of the fixed component portion structure in one embodiment of this application.

[0030] Figure 9 This is a view of a fixed component of an energy storage system in a first unlocked position in the opposite direction of a second direction, according to one embodiment of this application.

[0031] Figure 10 This is a view of an energy storage system in one embodiment of the present application, in the opposite direction to the second direction, with a fixed component in a first locked position.

[0032] Figure 11 This is a view of a portion of the energy storage system structure in the opposite direction to the second direction in one embodiment of this application.

[0033] Figure 12 This is a view in the opposite direction of the second direction of a fixed component of the energy storage system in a second unlocked position, according to one embodiment of this application.

[0034] Figure 13 This is a view in the opposite direction of the second direction of a fixed component of the energy storage system in a second locked position, according to one embodiment of this application.

[0035] Figure 14 This is a schematic diagram of the structure of the second module in one embodiment of this application.

[0036] Figure 15 This is a schematic diagram of the structure of the second structural member in one embodiment of this application.

[0037] Figure 16This is a schematic diagram of the structure of the first module in one embodiment of this application.

[0038] Figure 17 This is a schematic diagram of the energy storage system in one embodiment of this application.

[0039] Figure 18 This is an exploded view of an energy storage system in one embodiment of this application.

[0040] Figure 19 This is a schematic diagram of the structure of the handle connecting to the second module in one embodiment of this application.

[0041] Figure 20 This is a schematic diagram of the handle structure in one embodiment of this application.

[0042] Figure 21 This is a schematic diagram of the structure of the first structural member in one embodiment of this application.

[0043] Figure 22 This is a schematic diagram of the structure of the energy storage system connection bracket assembly in one embodiment of this application.

[0044] Figure 23 This is a view of a portion of the structure and support assembly of the energy storage system in one embodiment of this application, taken in the opposite direction to the second direction.

[0045] Figure 24 yes Figure 23 A magnified view of a portion of the central structure.

[0046] Figure 25 This is a schematic diagram of the connector structure in one embodiment of this application.

[0047] Figure 26 This is a partial enlarged view of a portion of the structure of the energy storage system and a portion of the support assembly in the opposite direction to the second direction in one embodiment of this application.

[0048] Explanation of main component symbols

[0049] Energy storage system 100

[0050] Module 10

[0051] First shell 11

[0052] First Wall 111

[0053] First structural component 112

[0054] First convex portion 1121

[0055] First cavity 11211

[0056] First opening 11212

[0057] Through slot 1122

[0058] First area 11221

[0059] Second area 11222

[0060] Third region 11223

[0061] Beyond Area A

[0062] Third Wall 113

[0063] First left wall 114

[0064] First right wall 115

[0065] First Top Wall 116

[0066] First bottom wall 117

[0067] first recess 1171

[0068] Second recess 1172

[0069] First connecting terminal 13

[0070] Module 20

[0071] Second shell 21

[0072] Second Wall 211

[0073] Second structural component 212

[0074] Second convex portion 2121

[0075] Second cavity 21211

[0076] Second opening 21212

[0077] Through hole 2122

[0078] Second conductive part 2123

[0079] Second insulating layer 2124

[0080] Fourth Wall 213

[0081] Second left wall 214

[0082] Second right wall 215

[0083] Second top wall 216

[0084] The third convex part 2161

[0085] Second bottom wall 217

[0086] First insulating layer 218

[0087] Second connection terminal 23

[0088] Fixed component 30

[0089] Cover 31

[0090] Groove 311

[0091] Shaft 32

[0092] Extension 321

[0093] Limiting part 322

[0094] Gasket 33

[0095] Connector 34

[0096] Part 1, page 341

[0097] Part 2, page 342

[0098] Module 3, Question 40

[0099] Handle 50

[0100] Connecting part 51

[0101] Support assembly 60

[0102] First support 61

[0103] Second support 62

[0104] First direction X

[0105] Second direction Y

[0106] Third direction Z

[0107] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0108] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0109] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an element positioned in between. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be an element positioned in between. In this application, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0110] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0111] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0112] In the description of the embodiments of this application, the term "perpendicular" is used to describe the ideal state between two components. In actual production or use, two components may exist in a state that is approximately perpendicular. For example, combined with numerical description, perpendicular can refer to the angle between two straight lines within the range of 90±10°, perpendicular can also refer to the dihedral angle between two planes within the range of 90°±10°, and perpendicular can also refer to the angle between a straight line and a plane within the range of 90±10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes, but can be approximately straight lines or planes. From a macroscopic perspective, if the overall extension direction is a straight line or plane, the component can be considered a "straight line" or "plane".

[0113] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. Where there is no conflict, the various embodiments in this application can be combined with each other.

[0114] It should be noted that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative examples and should not constitute any limitation on this application.

[0115] Embodiments of this application provide an energy storage system including a first module, a second module, and a fixing assembly. The second module and the first module are stacked along a first direction. The first module includes a first housing, which includes a first wall. The second module includes a second housing, which includes a second wall. The second wall and the first wall are arranged along the first direction. The first module and the second module are electrically connected. At least one of the first module and the second module includes a battery cell assembly. The fixing assembly connects the first wall and the second wall. The fixing assembly includes a first protrusion, a second protrusion, a through groove, a cover, and a shaft. The through groove is provided in at least one of the first protrusion and the second protrusion. Both the first protrusion and the second protrusion extend along a second direction, which is perpendicular to the first direction. The cover and the shaft are interconnected. The cover connects the first protrusion and the second protrusion. A portion of the shaft is provided in the through groove and connects to at least one of the first protrusion and the second protrusion.

[0116] In the aforementioned energy storage system, after the second module and the first module are stacked, the first wall and the second wall are connected by a fixing component, and the cover connects the first protrusion and the second protrusion. A portion of the shaft is provided in the through groove and connects to at least one of the first protrusion and the second protrusion, so that the cover restricts the relative movement between the first protrusion and the second protrusion, thereby restricting the relative movement between the first housing and the second housing, and restricting the relative movement between the first module and the second module. This helps to simplify the assembly process of connecting the first module and the second module with the fixing component and saves the installation cost of the energy storage system.

[0117] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0118] like Figures 1 to 8 As shown, an embodiment of this application provides an energy storage system 100, including a first module 10, a second module 20, and a fixing component 30. The second module 20 and the first module 10 are stacked along a first direction X. The fixing component 30 connects the first module 10 and the second module 20, which helps to limit the relative movement between the first module 10 and the second module 20, simplifies the assembly process of connecting the fixing component 30 to the first module 10 and the second module 20, and saves the installation cost of the energy storage system 100.

[0119] In one embodiment, the first module 10 includes a first housing 11, and the first housing 11 includes a first wall 111.

[0120] In one embodiment, the second module 20 includes a second housing 21, the second housing 21 including a second wall 211, the second wall 211 and the first wall 111 being arranged along a first direction X, and the first module 10 and the second module 20 being electrically connected. In one embodiment, at least one of the first module 10 and the second module 20 includes a battery cell assembly (not shown).

[0121] In one embodiment, the fixing component 30 includes a first protrusion 1121, a second protrusion 2121 and a through groove 1122. The through groove 1122 is provided in at least one of the first protrusion 1121 and the second protrusion 2121. Both the first protrusion 1121 and the second protrusion 2121 extend along a second direction Y, which is perpendicular to the first direction X.

[0122] In one embodiment, the fixing component 30 further includes a cover 31 and a shaft 32 connected to each other. The cover 31 connects the first protrusion 1121 and the second protrusion 2121, and a portion of the shaft 32 is disposed in the through groove 1122 and connects to at least one of the first protrusion 1121 and the second protrusion 2121.

[0123] In the energy storage system 100 described above, after the second module 20 and the first module 10 are stacked, the first wall 111 and the second wall 211 are connected by the fixing component 30, and the cover 31 is connected to the first protrusion 1121 and the second protrusion 2121. A portion of the shaft 32 is provided in the through groove 1122 and connects to at least one of the first protrusion 1121 and the second protrusion 2121, so that the cover 31 restricts the relative movement between the first protrusion 1121 and the second protrusion 2121, thereby restricting the relative movement between the first housing 11 and the second housing 21, and restricting the relative movement between the first module 10 and the second module 20. This helps to simplify the assembly process of the fixing component 30 connecting the first module 10 and the second module 20, and saves the installation cost of the energy storage system 100.

[0124] In one embodiment, there is static friction between the sidewalls of the shaft 32 and the through groove 1122. This static friction restricts the relative movement between the shaft 32 and the through groove 1122, which helps to reduce the risk of the cover 31 moving relative to the first protrusion 1121 or the second protrusion 2121, improves the connection stability between the first module 10 and the second module 20, and improves the seismic performance of the energy storage system 100.

[0125] In one embodiment, the first protrusion 1121 is connected to the first wall 111, and the second protrusion 2121 is connected to the second wall 211. The cover 31 restricts the relative movement between the first protrusion 1121 and the second protrusion 2121, thereby restricting the relative movement between the first wall 111 and the second wall 211, and restricting the relative movement between the first module 10 and the second module 20. This helps to simplify the assembly process of connecting the fixing component 30 to the first module 10 and the second module 20, and saves the installation cost of the energy storage system 100.

[0126] In other embodiments, the first protrusion 1121 connects the first wall 111 and the second wall 211 (not shown). Along the second direction Y, the projection of the first protrusion 1121 and the projection of the first wall 111 overlap, and the projection of the first protrusion 1121 and the projection of the second wall 211 overlap.

[0127] In other embodiments, the second protrusion 2121 connects the first wall 111 and the second wall 211 (not shown). Along the second direction Y, the projection of the second protrusion 2121 overlaps with the projection of the first wall 111.

[0128] As an example, the following description takes the first protrusion 1121 connected to the first wall 111 and the second protrusion 2121 connected to the second wall 211 as an example for further explanation.

[0129] In one embodiment, the fixing component 30 further includes a first structural member 112, which is connected to the first wall 111, and a first protrusion 1121 is disposed on the first structural member 112.

[0130] In one embodiment, the fixing component 30 further includes a second structural member 212, which is connected to the second wall 211. A second protrusion 2121 is disposed on the second structural member 212, and the second structural member 212 and the first structural member 112 are arranged along the first direction X.

[0131] The first structural member 112 connects to the first wall 111, the second structural member 212 connects to the second wall 211, and the cover 31 connects to the first protrusion 1121 and the second protrusion 2121. By restricting the relative movement between the first protrusion 1121 and the second protrusion 2121, the relative movement between the first structural member 112 and the second structural member 212 is also restricted, as is the relative movement between the first wall 111 and the second wall 211, and the relative movement between the first module 10 and the second module 20. This simplifies the assembly process of connecting the fixing component 30 to the first module 10 and the second module 20, and saves the installation cost of the energy storage system 100.

[0132] In one embodiment, the projections of the first structural member 112 and the second structural member 212 do not overlap along the second direction Y. When stacking the first module 10 and the second module 20, this helps to reduce the risk of interference between the first structural member 112 and the second structural member 212.

[0133] In one embodiment, the cover 31 is provided with a groove 311, at least a portion of the shaft 32 is disposed in the groove 311, and at least a portion of the first protrusion 1121 and at least a portion of the second protrusion 2121 are disposed in the groove 311. The cover 31 restricts the relative movement between the first protrusion 1121 and the second protrusion 2121 through the groove 311, thereby restricting the relative movement between the first structural member 112 and the second structural member 212, restricting the relative movement between the first wall 111 and the second wall 211, and restricting the relative movement between the first module 10 and the second module 20. This simplifies the assembly process of connecting the fixing component 30 to the first module 10 and the second module 20, and saves the installation cost of the energy storage system 100.

[0134] In one embodiment, when assembling the energy storage system 100, the second module 20 and the first module 10 are stacked and connected along the first direction X. The fixing component 30 approaches the first structural member 112 and the second structural member 212 in a direction opposite to the second direction Y, so that at least a portion of the first protrusion 1121 and at least a portion of the second protrusion 2121 are disposed in the groove 311 of the cover 31, and the shaft 32 of the cover 31 is inserted into the through groove 1122 and connected to the first protrusion 1121 or the second protrusion 2121. The static friction between the shaft 32 and the sidewall of the through groove 1122 makes the cover 31 stably connected to the first protrusion 1121 and the second protrusion 2121, which helps to simplify the assembly process of the fixing component 30 connecting the first module 10 and the second module 20 and saves the installation cost of the energy storage system 100.

[0135] In one embodiment, one of the first module 10 and the second module 20 is a control module, and the other of the first module 10 and the second module 20 is an energy storage module.

[0136] In one embodiment, the first module 10 is an energy storage module, and the second module 20 is an energy storage module.

[0137] In one embodiment, the control module includes a PCS (Power Conversion System).

[0138] In one embodiment, the energy storage module includes a battery cell assembly.

[0139] As an example, the following description will take the case where both the first module 10 and the second module 20 are energy storage modules.

[0140] In one embodiment, the first module 10 includes a first battery cell assembly (not shown), and the second module 20 includes a second battery cell assembly (not shown), and the first battery cell assembly and the second battery cell assembly are electrically connected.

[0141] In one embodiment, the first cell assembly includes a plurality of first cells connected in series and / or in parallel.

[0142] In one embodiment, the second cell assembly includes a plurality of second cells connected in series and / or in parallel.

[0143] In one embodiment, the first housing 11 further includes a third wall 113, a first left wall 114, a first right wall 115, a first top wall 116, and a first bottom wall 117. The third wall 113 and the first wall 111 are arranged along a second direction Y, the first left wall 114 and the first right wall 115 are arranged along a third direction Z, and the first bottom wall 117 and the first top wall 116 are arranged along a first direction X. The first top wall 116 and the first bottom wall 117 are both connected to the first wall 111, the third wall 113, the first left wall 114, and the first right wall 115. The terms "left," "right," "top," and "bottom" are used only to help describe the relative positions of the components and do not specifically limit the positions of the components.

[0144] In one embodiment, at least one of the first wall 111, the third wall 113, the first left wall 114, the first right wall 115, the first top wall 116, and the first bottom wall 117 is made of metal, which is beneficial to improve the structural strength and rigidity of the first housing 11, reduce the risk of deformation or damage to the first housing 11, and improve the safety performance of the first module 10.

[0145] In one embodiment, at least one of the first wall 111, the third wall 113, the first left wall 114, the first right wall 115, the first top wall 116, and the first bottom wall 117 is made of plastic material, which helps to reduce the weight of the first housing 11 and reduce the impact of the weight of the first housing 11 on the first module 10.

[0146] In one embodiment, the second housing 21 further includes a fourth wall 213, a second left wall 214, a second right wall 215, a second top wall 216, and a second bottom wall 217. The fourth wall 213 and the second wall 211 are arranged along a second direction Y, the second left wall 214 and the second right wall 215 are arranged along a third direction Z, and the second bottom wall 217 and the second top wall 216 are arranged along a first direction X. The second top wall 216 and the second bottom wall 217 are both connected to the second wall 211, the fourth wall 213, the second left wall 214, and the second right wall 215. The second top wall 216 and the first bottom wall 217 are arranged along the first direction X and are connected.

[0147] In one embodiment, at least one of the second wall 211, the fourth wall 213, the second left wall 214, the second right wall 215, the second top wall 216, and the second bottom wall 217 is made of metal, which is beneficial to improve the structural strength and rigidity of the second housing 21, reduce the risk of deformation or damage to the second housing 21, and improve the safety performance of the second module 20.

[0148] In one embodiment, at least one of the second wall 211, the fourth wall 213, the second left wall 214, the second right wall 215, the second top wall 216, and the second bottom wall 217 is made of plastic material, which helps to reduce the weight of the second housing 21 and reduce the impact of the weight of the second housing 21 on the first module 10.

[0149] In one embodiment, the first structural member 112 is made of metal, which helps to improve the structural strength and rigidity of the first structural member 112, reduce the risk of deformation or damage to the first structural member 112, and improve the stability of the connection between the first module 10 and the second module 20 via the fixing component 30. In one embodiment, the first structural member 112 is welded to the first wall 111.

[0150] In one embodiment, the second structural member 212 is made of metal, which helps to improve the structural strength and rigidity of the second structural member 212, reduce the risk of deformation or damage to the second structural member 212, and improve the stability of the connection between the first module 10 and the second module 20 via the fixing component 30. In one embodiment, the second structural member 212 is welded to the second wall 211.

[0151] In one embodiment, at least one of the cover 31 and the shaft 32 is made of metal, which helps to improve the structural strength and rigidity of the fixing component 30, reduce the risk of deformation or damage to the fixing component 30, and improve the stability of the connection between the first module 10 and the second module 20 through the fixing component 30. In one embodiment, both the cover 31 and the shaft 32 are made of metal, and the shaft 32 is welded to the cover 31.

[0152] In one embodiment, at least one of the cover 31 and the shaft 32 is made of plastic, which helps to reduce the weight of the fixing component 30 and reduce the impact of the weight of the fixing component 30 on the energy storage system 100. In another embodiment, at least one of the cover 31 and the shaft 32 is formed by melting and solidifying plastic using injection molding equipment, which helps to simplify the manufacturing process of the cover 31 or the shaft 32 and improve its manufacturing efficiency.

[0153] In one embodiment, the cover 31 is made of plastic and the shaft 32 is made of metal. The shaft 32 is integrally formed with the cover 31 by injection molding equipment, which helps to simplify the connection process between the cover 31 and the shaft 32 and improve the assembly efficiency of the fixing component 30.

[0154] In one embodiment, the through groove 1122 is provided on the first protrusion 1121. In other embodiments, the through groove 1122 is provided on the second protrusion 2121 (not shown). In other embodiments, a portion of the through groove 1122 is provided on the first protrusion 1121, and a portion of the through groove 1122 is provided on the second protrusion 2121 (not shown).

[0155] As an example, the following description takes the example of a through groove 1122 being provided on the first protrusion 1121.

[0156] like Figures 3 to 10 As shown, in one embodiment, the shaft 32 includes an extension 321 and a limiting portion 322. The extension 321 connects the limiting portion 322 and the cover 31. The extension 321 and the limiting portion 322 are arranged in a direction opposite to the second direction Y.

[0157] In one embodiment, the through groove 1122 includes a first region 11221 and a second region 11222 that are interconnected. The first region 11221 is configured to allow the limiting portion 322 to pass through, and the second region 11222 is configured to restrict the passing of the limiting portion 322. The first region 11221 and the second region 11222 are configured to allow the extension portion 321 to move between the first region 11221 and the second region 11222. The extension portion 321 and the limiting portion 322 can extend into the through groove 1122 through the first region 11221 or exit the through groove 1122 through the first region 11221. When the extension portion 321 and the limiting portion 322 move to the second region 11222, the second region 11222 can restrict the passing of the limiting portion 322, thereby restricting the movement of the shaft 32 along the second direction Y.

[0158] In one embodiment, the cross-sections of the extension 321 and the limiting portion 322 are both circular in a cross-section perpendicular to the second direction Y, which facilitates the manufacturing of the shaft 32, improves the processing efficiency of the shaft 32, and saves the processing cost of the shaft 32.

[0159] In other embodiments, the cross-section of the extension 321 or the limiting portion 322 in a cross-section perpendicular to the second direction Y is triangular, rectangular, elliptical or other shapes.

[0160] In one embodiment, the outer diameter of the extension 321 is defined as d1, the outer diameter of the limiting part 322 is defined as d2, d1 < d2, the minimum inner diameter of the first region 11221 is defined as d3, and the maximum inner diameter of the second region 11222 is defined as d4, d1 ≤ d4 < d2 < d3. The extension 321 and the limiting part 322 of the shaft 32 can be inserted into the first region 11221 or move away from the first protrusion 1121 from the first region 11221. After the extension 321 and the limiting part 322 are inserted into the first region 11221, the extension 321 can move relative to the through groove 1122 and move to the second region 11222. At this time, the second region 11222 can restrict the movement of the limiting part 322 in the second direction Y, thereby restricting the movement of the cover 31 relative to the first protrusion 1121 in the second direction Y.

[0161] In one embodiment, the through groove 1122 is arc-shaped, and the cover 31 is rotatably connected to the first protrusion 1121 and the second protrusion 2121. The cover 31 has a first unlocked position and a first locked position relative to the first protrusion 1121 and the second protrusion 2121. That is, the fixing component 30 has a first unlocked position and a first locked position relative to the first wall 111 and the second wall 211. When the fixing component 30 is in the first unlocked position, the extension 321 is located in the first region 11221, and the shaft 32 can move away from the through groove 1122 along the second direction Y. When the cover 31 rotates relative to the first protrusion 1121 and the second protrusion 2121, and the fixing component 30 is in the first locked position, the extension 321 is located in the second region 11222. The second region 11222 can restrict the limiting part 322 from passing through along the second direction Y, and the through groove 1122 can restrict the movement of the cover 31 along the second direction Y.

[0162] In one embodiment, when installing the energy storage system 100, after the second module 20 and the first module 10 are stacked along the first direction X, the limiting part 322 and the extension part 321 of the shaft 32 are inserted into the first region 11221 in the opposite direction to the second direction Y. The cover 31 is rotated so that the limiting part 322 moves to the second region 11222 in the through groove 1122. At this time, the second region 11222 can restrict the movement of the limiting part 322, thereby restricting the movement of the cover 31 relative to the first protrusion 1121 and the second protrusion 2121, so that the fixing component 30 is in the first locking position that locks the first wall 111 and the second wall 211. This assembly process is simple and easy to operate, which facilitates the installation of the energy storage system 100.

[0163] In one embodiment, when disassembling the energy storage system 100, the cover 31 is rotated so that the limiting part 322 moves from the second region 11222 to the first region 11221. At this time, the cover 31 can move relative to the first protrusion 1121 along the second direction Y, so that the shaft 32 leaves the through groove 1122, thereby releasing the limiting between the first module 10 and the second module 20. This disassembly process is simple and easy to operate, and facilitates the disassembly of the energy storage system 100.

[0164] In one embodiment, the through slot 1122 further includes a third region 11223 that connects the first region 11221 and the second region 11222. The third region 11223 is configured to allow the extension 321 to pass through, so that the extension 321 can move between the first region 11221 and the second region 11222.

[0165] In one embodiment, at least a portion of the third region 11223 extends beyond the second region 11222 along the first direction X, which helps to restrict the movement of the shaft 32 located in the second region 11222, reduce the risk of the cover 31 separating from the first protrusion 1121 or the second protrusion 2121, improve the reliability of the fixing component 30 in the first locking position, improve the connection stability between the first module 10 and the second module 20, and improve the seismic performance of the energy storage system 100.

[0166] In one embodiment, the third region 11223 includes regions beyond A (e.g., Figure 4 As shown), along the first direction X, the area A extends beyond the second area 11222, which helps to restrict the movement of the shaft 32 in the second area 11222, reduce the risk of the cover 31 separating from the first protrusion 1121 or the second protrusion 2121, improve the reliability of the fixing component 30 in the first locking position, improve the connection stability between the first module 10 and the second module 20, and improve the seismic performance of the energy storage system 100.

[0167] In one embodiment, the extended region A is located at the end of the through slot 1122 along the first direction X. In another embodiment, the first direction X is vertically upward, and the first module 10 is stacked on top of the second module 20.

[0168] Along the first direction X, the minimum distance between the second structural member 212 and the second region 11222 is defined as W1, and the minimum distance between the second structural member 212 and the third region 11223 is defined as W2, where W1 < W2 (e.g., ...). Figure 4 (As shown). Along the first direction X, the third region 11223 is higher than the second region 11222, which helps to limit the movement of the shaft 32 located in the second region 11222, reduce the risk of the cover 31 separating from the first protrusion 1121 or the second protrusion 2121, improve the connection stability between the first module 10 and the second module 20, and improve the seismic performance of the energy storage system 100.

[0169] In one embodiment, along the third direction Z, the first region 11221 and the second region 11222 are located on opposite sides of the third region 11223. Under the action of gravity, this helps to restrict the movement of the shaft 32 located in the second region 11222, reducing the risk of the shaft 32 moving from the second region 11222 to the first region 11221 due to swaying, improving the connection stability between the first module 10 and the second module 20, and improving the seismic performance of the energy storage system 100. The third direction Z is perpendicular to both the first direction X and the second direction Y.

[0170] In one embodiment, the outer diameter d1 of the extension 321 is equal to the minimum inner diameter d4 of the second region 11222. When the extension 321 is located in the region with the smallest inner diameter of the second region 11222, the friction between the extension 321 and the sidewall of the through groove 1122 helps to limit the movement of the shaft 32 relative to the through groove 1122, reduce the risk of the shaft 32 moving from the second region 11222 to the first region 11221 due to shaking, improve the connection stability between the first module 10 and the second module 20, and improve the seismic performance of the energy storage system 100.

[0171] like Figure 11 As shown, in one embodiment, at least a portion of the first region 11221 extends beyond the second region 11222 along the first direction X. This helps to limit the movement of the shaft 32 located in the second region 11222, reduces the risk of the shaft 32 moving from the second region 11222 to the first region 11221 due to shaking, improves the connection stability between the first module 10 and the second module 20, and improves the seismic performance of the energy storage system 100.

[0172] like Figures 7 to 10 As shown, in one embodiment, the fixing component 30 further includes a gasket 33, which is disposed in the groove 311 and connected to the cover 31. The gasket 33 contacts and connects to the first protrusion 1121 and the second protrusion 2121, which helps to increase the connection stability between the cover 31 and the first protrusion 1121, and between the cover 31 and the second protrusion 2121, reduces the risk of rotation of the cover 31 relative to the first protrusion 1121 and the second protrusion 2121, reduces the risk of separation of the cover 31 from the first protrusion 1121 and the second protrusion 2121, improves the connection stability between the first module 10 and the second module 20, and improves the seismic performance of the energy storage system 100. The gasket 33 connects to the cover 31 and contacts and connects to the first protrusion 1121 and the second protrusion 2121, which also helps to compensate for the dimensional tolerances of the cover 31, the first protrusion 1121 and the second protrusion 2121 along the second direction Y, and restricts the movement of the cover 31 relative to the first protrusion 1121 and the second protrusion 2121 in the second direction Y.

[0173] In one embodiment, when the fixing component 30 is in the first locking position, the gasket 33 is in a state of compression deformation along the second direction Y, which helps to improve the connection stability between the cover 31 and the first protrusion 1121, and between the second protrusion 2121, reduces the risk of the cover 31 rotating relative to the first protrusion 1121 and the second protrusion 2121, reduces the risk of the cover 31 separating from the first protrusion 1121 and the second protrusion 2121, improves the connection stability between the first module 10 and the second module 20, and improves the seismic performance of the energy storage system 100.

[0174] In one embodiment, the gasket 33 includes, but is not limited to, any one of a silicone gasket and a rubber gasket, which helps to save costs. In another embodiment, the gasket 33 is adhered to the inner wall of the cover 31, which helps to reduce the risk of the gasket 33 separating from the cover 31.

[0175] like Figure 12 and Figure 13 As shown, in one embodiment, the outer diameter of the extension 321 is defined as d1, the outer diameter of the limiting part 322 is defined as d2, and the minimum inner diameter of the through groove 1122 is defined as d4, where d1≤d4<d2. At least a portion of the extension 321 is located within the through groove 1122, and the limiting part 322 is located inside the first protrusion 1121. The minimum inner diameter d4 of the through groove 1122 is smaller than the outer diameter d2 of the limiting part 322, so that the cover 31 is movably connected to the first structural member 112, and the limiting part 322 cannot leave the through groove 1122, which helps to reduce the risk of the cover 31 being lost.

[0176] In one embodiment, the cover 31 is rotatably connected to the first structural member 112, such that the fixing component 30 has a second unlocked position and a second locked position relative to the first wall 111 and the second wall 211.

[0177] When the second module 20 and the first module 10 are stacked and connected along the first direction X, and the fixing component 30 is in the second unlocked position, the projection of the cover 31 and the projection of the second protrusion 2121 do not overlap along the second direction Y.

[0178] When the second module 20 and the first module 10 are stacked and connected along the first direction X, and the fixing component 30 is in the second locking position, the projection of the cover 31 and the projection of the second protrusion 2121 overlap along the second direction Y.

[0179] By rotating the cover 31 relative to the first protrusion 1121, the fixing component 30 moves between the second unlock position and the second locking position to lock or unlock the first module 10 and the second module 20, which facilitates operation and helps save on the installation and disassembly costs of the energy storage system 100.

[0180] like Figure 6 , Figure 14 and Figure 15As shown, in one embodiment, the second protrusion 2121 is provided with a through hole 2122, which penetrates the second protrusion 2121. The through hole 2122 can serve as a drainage hole, allowing the liquid accumulated in the second protrusion 2121 to drain out and reducing the accumulation of liquid in the second protrusion 2121.

[0181] In one embodiment, a portion of the through hole 2122 is located at the end of the second protrusion 2121 in a direction opposite to the first direction X, that is, a portion of the through hole 2122 is located at the bottom of the second protrusion 2121, which further facilitates the discharge of liquid from the second protrusion 2121.

[0182] like Figure 1 and Figure 2 As shown, in one embodiment, the first structural member 112 has two first protrusions 1121, which are arranged along the third direction Z. The second structural member 212 has two second protrusions 2121, which are arranged along the third direction Z. There are two covers 31 and two shafts 32. One assembly formed by the cover 31 and shaft 32 connects one first protrusion 1121 and one second protrusion 2121, while the other assembly formed by the cover 31 and shaft 32 connects another first protrusion 1121 and another second protrusion 2121. This improves the connection stability between the first module 10 and the second module 20, and enhances the seismic performance of the energy storage system 100.

[0183] In one embodiment, there are multiple fixing components 30. One fixing component 30 connects the first wall 111 and the second wall 211, and another fixing component 30 connects the third wall 113 and the fourth wall 213. This helps to improve the connection stability between the first module 10 and the second module 20 and improve the seismic performance of the energy storage system 100.

[0184] In one embodiment, the second housing 21 includes a first conductive portion (not shown) and a first insulating layer 218. The first insulating layer 218 is disposed on a portion of the surface of the first conductive portion, and a portion of the first conductive portion is exposed in the first insulating layer 218. The exposed portion of the first conductive portion is configured to be electrically connected to the ground or an external device, so that the second housing 21 and the ground or other external device are at the same potential, which is beneficial to improving the safety performance of the energy storage system 100.

[0185] In one embodiment, the first insulating layer 218 provides insulation protection for the second housing 21, which helps reduce the risk of short circuit between the second housing 21 and the second cell assembly, and also helps reduce the risk of corrosion of the second housing 21.

[0186] In one embodiment, the second structural member 212 includes a second conductive portion 2123 and a second insulating layer 2124. The second insulating layer 2124 is disposed on a portion of the surface of the second conductive portion 2123. The second conductive portion 2123 is electrically connected to the first conductive portion. A portion of the second conductive portion 2123 is exposed on the second insulating layer 2124. The exposed portion of the second conductive portion 2123 is configured to be electrically connected to ground or an external device, so that the second housing 21 and the ground or other external device are at the same potential, which is beneficial to improving the safety performance of the energy storage system 100. Connecting to ground or external devices through the second structural member 212 facilitates operation.

[0187] like Figure 2 , Figure 14 and Figure 16 As shown, in one embodiment, the first bottom wall 117 is provided with a first recess 1171, which is recessed along the first direction X. The second top wall 216 is also provided with a third protrusion 2161, which extends along the first direction X, and at least a portion of the third protrusion 2161 is located within the first recess 1171. When stacking the first module 10 and the second module 20, the connection between the third protrusion 2161 and the first recess 1171 can serve as a guide, guiding the stacking of the first module 10 and the second module 20, which helps to simplify the installation of the energy storage system 100, improve the connection accuracy between the first module 10 and the second module 20, and the fact that at least a portion of the third protrusion 2161 is located within the first recess 1171 can also serve as a limiting function, restricting the relative movement between the first module 10 and the second module 20 along the direction perpendicular to the first direction X, thereby improving the seismic performance of the energy storage system 100.

[0188] In one embodiment, the first module 10 further includes a first connection terminal 13, which is disposed on the first bottom wall 117 and connected to the first battery cell assembly. The second module 20 further includes a second connection terminal 23, which is disposed on the second top wall 216 and connected to the second battery cell assembly and the first connection terminal 13. The first module 10 and the second module 20 are electrically connected through the connection between the first connection terminal 13 and the second connection terminal 23.

[0189] In one embodiment, along the first direction X, the third protrusion 2161 extends beyond the second connecting terminal 23. The third protrusion 2161 can protect the second connecting terminal 23, reducing the risk of the second connecting terminal 23 being damaged by foreign objects in a direction opposite to the first direction X.

[0190] In one embodiment, the first bottom wall 117 is provided with a second recess 1172, which is recessed along a first direction X. The first connecting terminal 13 is disposed within the second recess 1172, and does not extend beyond the second recess 1172 in a direction opposite to the first direction X. When the first module 10 is placed on a structural surface, with the first bottom wall 117 below and the first top wall 116 above, the second recess 1172 can protect the first connecting terminal 13, which not only helps reduce the risk of the first connecting terminal 13 being damaged by impact, but also helps reduce the risk of liquid contact with the first connecting terminal 13, thus extending the service life of the first connecting terminal 13.

[0191] like Figure 17 and Figure 18 As shown, in one embodiment, the energy storage system 100 further includes a third module 40, and the third module 40, the second module 20 and the first module 10 are arranged along a first direction X.

[0192] In one embodiment, the structure and method of connection between the third module 40 and the second module 20 are the same as any of the embodiments in which the first module 10 and the second module 20 are connected by the fixing component 30, and will not be repeated here.

[0193] like Figure 19 and Figure 20 As shown, in one embodiment, the energy storage system 100 further includes a handle 50, which is detachably connected to the second protrusion 2121. When it is necessary to move an energy storage module, the handle 50 is connected to the second protrusion 2121 to facilitate the movement of the energy storage module. After the movement is completed, the handle 50 can be removed from the second protrusion 2121, which helps to reduce the impact of the handle 50 on the outline of the energy storage module and facilitates the storage of the energy storage module.

[0194] In one embodiment, the handle 50 includes a connecting portion 51, a portion of which can be inserted into a through hole 2122, which helps to simplify the connection process between the handle 50 and the second structural member 212, and also facilitates the removal of the handle 50.

[0195] In one embodiment, the handle 50 includes two connecting parts 51, which are arranged along the third direction Z. One connecting part 51 is inserted into the through hole 2122 of a second protrusion 2121, which facilitates handling and improves the safety of handling the energy storage module.

[0196] In one embodiment, the first wall 111 is provided with a second structural member 212 at its end along the first direction X. The first module 10 can be moved by inserting the connecting part 51 of the handle 50 into the through hole 2122 of the second structural member 212.

[0197] like Figure 14 , Figure 15 , Figures 21 to 26 As shown, in one embodiment, the first protrusion 1121 has a first cavity 11211 and a first opening 11212 that are in communication with each other, and the second protrusion 2121 has a second cavity 21211 and a second opening 21212 that are in communication with each other. The second opening 21212 and the first opening 11212 face each other along a first direction X. When the first module 10 is stacked on the second module 20 in a direction opposite to the first direction X, the first opening 11212 and the second opening 21212 face each other, and the first cavity 11211 and the second cavity 21211 are in communication with each other.

[0198] The fixing assembly 30 also includes a connector 34, which includes a first part 341 and a second part 342 that are connected to each other. Part of the structure of the first part 341 is located in the first cavity 11211, and part of the structure of the first part 341 is located in the second cavity 21211. The second part 342 extends out a first protrusion 1121 and a second protrusion 2121. The second part 342 is configured to connect to an external structure, which is beneficial for the energy storage system 100 to be connected and installed on the external structure. It also helps to reduce the number of accessories on the energy storage system 100 for connecting to the external structure, and simplifies the connection process between the energy storage system 100 and the external structure, thereby saving the installation cost of the energy storage system 100.

[0199] In one embodiment, when a portion of the structure of the first part 341 is located in the first cavity 11211 and a portion of the structure of the first part 341 is located in the second cavity 21211, after the cover 31 connects the first protrusion 1121 and the second protrusion 2121, the cover 31 limits the connection between the first protrusion 1121 and the second protrusion 2121. The first protrusion 1121 and the second protrusion 2121 cooperate to limit the connection between the connector 34, which is beneficial to improving the stability of the connector 34 in connecting the energy storage system 100 and improving the stability of the energy storage system 100 in connecting to the external structure through the connector 34.

[0200] In one embodiment, the end of the limiting portion 322 away from the extension portion 321 contacts the connecting member 34, which helps to limit the movement of the connecting member 34 relative to the first protrusion 1121 or the second protrusion 2121, improves the stability of the connecting member 34 in connecting the first protrusion 1121 and the second protrusion 2121, and improves the connection stability between the energy storage system 100 and the external structure.

[0201] In one embodiment, the energy storage system 100 further includes a support assembly 60, which can be fixed to a wall or other structure and connected to a fixing assembly 30, so that the first module 10 and the second module 20 are stably connected to the wall or other structure after being stacked.

[0202] In one embodiment, the support assembly 60 includes a first support 61 and a second support 62, which are arranged in a direction opposite to the second direction Y. A connector 34 in the fixing assembly 30 connected to the first wall 111 and the second wall 211 is connected to the first support 61, and a connector 34 in the fixing assembly 30 connected to the third wall 113 and the fourth wall 213 is connected to the second support 62. This improves the stability of the energy storage system 100 connected to the walls or other structures, and enhances the safety of the energy storage system 100.

[0203] In one embodiment, the second part 342 and the first bracket 61 or the second bracket 62 are fixedly connected by bolts, which helps to improve the stability of the connection between the connector 34 and the first bracket 61 or the second bracket 62, and also facilitates installation and disassembly.

[0204] In summary, in the energy storage system 100 of this application, after the second module 20 and the first module 10 are stacked, the first wall 111 and the second wall 211 are connected by the fixing component 30, and the cover 31 is connected to the first protrusion 1121 and the second protrusion 2121. A portion of the shaft 32 is provided in the through groove 1122 and connects to at least one of the first protrusion 1121 and the second protrusion 2121, so that the cover 31 restricts the relative movement between the first protrusion 1121 and the second protrusion 2121, thereby restricting the relative movement between the first housing 11 and the second housing 21, and restricting the relative movement between the first module 10 and the second module 20. This simplifies the assembly process of connecting the first module 10 and the second module 20 with the fixing component 30 and saves the installation cost of the energy storage system 100.

[0205] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of this application.

Claims

1. An energy storage system, characterized in that, include: The first module includes a first housing, the first housing including a first wall; The second module is stacked with the first module along a first direction. The second module includes a second housing and a second wall. The second wall and the first wall are arranged along the first direction. The first module and the second module are electrically connected. At least one of the first module and the second module includes a battery cell assembly. A fixing component connecting the first wall and the second wall, the fixing component including a first protrusion, a second protrusion and a through groove, the through groove being provided in at least one of the first protrusion and the second protrusion, the first protrusion and the second protrusion both extending along a second direction, the second direction being perpendicular to the first direction; The fixing assembly also includes a cover and a shaft connected to each other. The cover connects the first protrusion and the second protrusion, and a portion of the shaft is disposed in the through groove and connects to at least one of the first protrusion and the second protrusion. The cover is provided with a groove, at least a portion of the shaft is disposed in the groove, and at least a portion of the first protrusion and at least a portion of the second protrusion are disposed in the groove; The shaft includes an extension and a limiting portion, the extension connecting the cover and the limiting portion; The through slot includes a first region and a second region that are interconnected. The first region is configured to allow the limiting portion to pass through, and the second region is configured to restrict the passing of the limiting portion. The first region and the second region are configured to allow the extension to move between the first region and the second region.

2. The energy storage system as described in claim 1, characterized in that, The first protrusion is connected to the first wall, and the second protrusion is connected to the second wall.

3. The energy storage system as described in claim 1, characterized in that, The fixing component has a first unlocking position and a first locking position relative to the first wall and the second wall; When the fixing component is in the first unlocked position, the extension is located in the first region; When the fixing component is in the first locking position, the extension is located in the second region.

4. The energy storage system as described in claim 1, characterized in that, The through-slot further includes a third region connecting the first region and the second region, the third region being configured to allow the extension to pass through, so that the extension can move between the first region and the second region; Along the first direction, at least a portion of the third region extends beyond the second region.

5. The energy storage system as described in claim 1, characterized in that, The first protrusion has a first cavity and a first opening that are interconnected, and the second protrusion has a second cavity and a second opening that are interconnected, with the second opening and the first opening facing each other along the first direction; The fixing component further includes a connector comprising a first portion and a second portion connected to each other, wherein a portion of the first portion is located in the first cavity, a portion of the first portion is located in the second cavity, and the second portion extends out the first protrusion and the second protrusion, and the second portion is configured to connect to an external structure.

6. The energy storage system as described in claim 5, characterized in that, The shaft includes an extension and a limiting part that are connected to each other. The extension is connected to the cover, and the limiting part is in contact with the connector.

7. The energy storage system as described in claim 1, characterized in that, The fixing component also includes a gasket, which is disposed in the groove and connected to the cover. The gasket contacts and connects the first protrusion and the second protrusion.

8. The energy storage system as described in claim 1, characterized in that, The second protrusion is provided with a through hole, which penetrates the second protrusion.

9. The energy storage system as described in claim 8, characterized in that, The energy storage system also includes a handle that is detachably connected to the second protrusion; When the handle is connected to the second protrusion, a portion of the handle is located in the through hole.

10. The energy storage system as described in claim 1, characterized in that, The shaft includes an extension and a limiting portion connected to each other. The extension connects the limiting portion and the cover. The extension is located in the through groove, which is configured to restrict the passage of the limiting portion. The fixing component has a second unlocking position and a second locking position relative to the first wall and the second wall; When the fixing component is in the second unlocked position, the projection of the cover and the projection of the second protrusion do not overlap along the second direction; When the fixing component is in the second locking position, the projection of the cover and the projection of the second protrusion overlap along the second direction.

Images