Battery pack and energy storage system

Abstract

A battery pack and energy storage system, the battery pack comprising a shell, a battery module, a first device group and a second device group; wherein the shell comprises a first surface and a second surface; the battery module is accommodated in the shell; the first device group is installed outside the shell and located on the first surface; the second device group is installed outside the shell and located on the second surface; the first device group and the second device group are electrically connected with the battery module. The battery pack can solve the compatibility problem of components and insulating coolant, reduce the selection cost of the battery pack and the risk in the use process.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to a battery pack and energy storage system. Background Technology

[0002] Submersible battery packs are gradually becoming the mainstream design solution for energy storage systems due to their efficient heat dissipation and intrinsic safety. In addition to batteries, battery packs also include components such as battery management systems, DC-DC converters, connectors, and relays.

[0003] In existing submersible battery packs, the aforementioned components typically need to be immersed in an insulating coolant. Therefore, the compatibility between the components and the insulating coolant is of high importance in battery packs, which not only increases the cost of component selection but also increases the risks associated with subsequent use of the battery pack. Utility Model Content

[0004] The purpose of this invention is to provide a battery pack and energy storage system that solves the compatibility problem between components and insulating coolant in existing battery packs, thereby reducing the selection cost and risks during the use of the battery pack.

[0005] To achieve the objectives of this utility model, the following technical solution is provided: In a first aspect, the present invention provides a battery pack, including a housing, a battery module, a first device group, and a second device group; wherein the housing includes a first surface and a second surface; the battery module is housed in the housing; the first device group is installed outside the housing and located on the first surface; the second device group is installed outside the housing and located on the second surface; both the first device group and the second device group are electrically connected to the battery module.

[0006] In some embodiments, the first surface and the second surface are opposite to each other along a first direction, the first device group is electrically connected to the battery module, and the second device group is electrically connected to the first device group.

[0007] In some embodiments, the battery pack further includes a first sealing plate and a second sealing plate, the first surface facing the first sealing plate and the second surface facing the second sealing plate, the first device group being located between the first sealing plate and the first surface and connected to the first surface; and the second device group being located between the second sealing plate and the second surface and connected to the second sealing plate.

[0008] In some embodiments, the battery pack further includes a third sealing plate and a fourth sealing plate disposed opposite to each other along a second direction, the housing is located between the third sealing plate and the fourth sealing plate, a first wiring space is provided between the third sealing plate and the side plate of the housing, and a second wiring space is provided between the fourth sealing plate and the side plate of the housing, the first direction and the second direction intersect.

[0009] In some embodiments, the third sealing plate is connected to the first sealing plate and the second sealing plate at its two ends opposite to each other along the first direction, and the fourth sealing plate is connected to the first sealing plate and the second sealing plate at its two ends opposite to each other along the first direction.

[0010] In some embodiments, the battery pack further includes a first mounting beam and a second mounting beam, which are connected to the outer surface of the housing. The first mounting beam and the second mounting beam are spaced apart along the height direction of the housing. A second sealing plate connects the first mounting beam and the second mounting beam, and the first direction intersects the height direction.

[0011] In some embodiments, the housing further contains an insulating coolant, and the battery module is immersed in the insulating coolant. The battery module includes cylindrical batteries and / or prismatic batteries.

[0012] In some embodiments, a wiring hole is provided on the first surface, the wiring hole connecting the inner and outer spaces of the housing, and the battery pack also includes a connecting wire passing through the wiring hole to connect the battery module and the first device group.

[0013] In some embodiments, the wiring hole includes a first wiring hole and a second wiring hole, and the connecting line includes a first connecting line and a second connecting line. The first connecting line passes through the first wiring hole to connect the battery module and the first device group; the second connecting line passes through the second wiring hole to connect the battery module and the first device group.

[0014] In some embodiments, the battery pack further includes a sealing element disposed in the wiring hole, the sealing element being used to seal any gaps remaining after the connecting wire passes through the wiring hole.

[0015] In some embodiments, the first device group includes at least one of a battery management module, a relay, a fuse, and a connector, and the second device group includes at least one of a voltage conversion module, a display, and a light panel.

[0016] In a second aspect, the present invention provides an energy storage system, the energy storage system including an electrical device and a battery pack as described in any one of the embodiments of the first aspect, the battery pack being electrically connected to the electrical device, and the battery pack being used to supply power to the electrical device.

[0017] The battery pack provided by this utility model solves the compatibility problem between the first and second device groups and the insulating coolant in an immersion battery pack by mounting the first device group and the second device group outside the housing. This reduces the number of components immersed in the insulating coolant, lowers the selection cost of the battery pack, and reduces the risk during use. At the same time, by setting the first and second device groups on different first and second surfaces, the heat generated by the accumulation of the first and second device groups can be reduced, the heat dissipation efficiency outside the housing can be improved, and the thermal runaway problem of components in the battery pack can be reduced. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an external view of the battery pack in one embodiment; Figure 2 This is an exploded view of the casing in one implementation method; Figure 3 This is an exploded top view of the battery pack in one embodiment; Figure 4 This is an exploded view of the battery pack in one implementation method; Figure 5 It is a front view of the first surface in one embodiment; Figure 6 This is a back and front view of the second sealing plate in one embodiment; Figure 7 This is an external view of the second sealing plate in one embodiment.

[0020] Explanation of reference numerals in the attached figures: 100-battery pack; 11-Shell, 12-Top cover, 121-Explosion-proof valve, 13-Shell body, 131-Outer periphery flange, 14-First side plate, 15-Second side plate, 16-Third side plate, 17-Fourth side plate, 18-First surface, 19-Second surface, 20-Wiring hole, 201-First wiring hole, 202-Second wiring hole; 21-Battery module, 22-First device group, 23-Second device group; 31-First sealing plate, 311-Fifth flange, 312-Sixth flange, 313-First opening, 32-Second sealing plate, 321-Second opening, 322-Third opening, 323-Handle, 33-Third sealing plate, 331-First flange, 332-Second flange, 333-Third flange, 334-Fourth flange, 34-Fourth sealing plate; 41 - First mounting beam, 42 - Second mounting beam; 51 - Sealing strip; 001 - First direction, 002 - Second direction, 003 - Altitude direction. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0023] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0024] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] This utility model provides a battery pack 100, please refer to it. Figure 1 The battery pack 100 is used in an energy storage system to supply power to electrical equipment within the system. Optionally, the battery pack 100 provided by this invention is a submersible battery pack 100, which is filled with insulating coolant. The batteries in the battery pack 100 are submerged in the insulating coolant.

[0026] For some implementation methods, please refer to Figure 2 and Figure 3 The battery pack 100 includes a housing 11, a battery module 21, a first device group 22, and a second device group 23. The housing 11 includes a first surface 18 and a second surface 19. The battery module 21 is housed in the housing 11. The first device group 22 is mounted outside the housing 11 and located on the first surface 18. The second device group 23 is mounted outside the housing 11 and located on the second surface 19. Both the first device group 22 and the second device group 23 are electrically connected to the battery module 21.

[0027] In a specific embodiment, please refer to Figure 2 and Figure 3 The shell 11 can have a hexahedral shape, specifically a cuboid shape. The shell 11 includes a length direction, a width direction, and a height direction 003; wherein, the longest side of the shell 11 is the length direction, the second longest side is the width direction, and the shortest side of the shell 11 is the height direction 003. Alternatively, on the working surface on which the shell 11 is placed, the direction perpendicular to the working surface is the height direction 003. It should be noted that, in the following text, the first direction 001 refers to the length direction of the shell 11, and the second direction 002 refers to the width direction of the shell 11.

[0028] In a specific embodiment, please refer to Figure 2 and Figure 4 The housing 11 includes a top plate, a bottom plate, and four side plates. The top and bottom plates are positioned opposite each other along the height direction 003, and can be the largest sheet metal panels in the housing 11. The four side plates include a first side plate 14, a second side plate 15, a third side plate 16, and a fourth side plate 17. The first side plate 14 and the second side plate 15 are positioned opposite each other along a first direction 001, and the third side plate 16 and the fourth side plate 17 are positioned opposite each other along a second direction 002. The top plate, bottom plate, and four side plates together enclose the internal space of the housing 11. This battery pack can meet the installation requirements of a 19-inch rack.

[0029] In a specific embodiment, please refer to Figure 2 The first surface 18 and the second surface 19 are the outer surfaces of the housing 11, that is, the surfaces of the housing 11 facing away from the internal space. The first surface 18 and the second surface 19 are two outer surfaces on different side plates of the housing 11, that is, the first surface 18 and the second surface 19 are not located on the same side plate of the housing 11. Optionally, the first surface 18 and the second surface 19 can be two opposite outer surfaces on the housing 11; or, the first surface 18 and the second surface 19 can be two connected outer surfaces on the housing 11 with an included angle.

[0030] In a specific embodiment, the battery module 21 is housed within the internal space of the housing 11, and the battery module 21 includes at least one battery. Optionally, the battery can be a cylindrical battery or a prismatic battery; it is understood that the shape of the battery in the battery module 21 is not limited. Optionally, when the battery is a cylindrical battery, the battery module 21 may further include a battery bracket, aluminum busbar, PCB board, wiring harness, insulating and heat-insulating sheet, and fasteners, etc. Optionally, when the battery is a prismatic battery, the battery module 21 may further include an end plate, steel strap / packing strap, aluminum busbar, wiring harness, insulating and heat-insulating sheet, and fasteners, etc.

[0031] In a specific embodiment, the first device group 22 and the second device group 23 may include low-voltage components necessary for the battery pack 100. Both the first device group 22 and the second device group 23 include at least one low-voltage component. Optionally, the first device group 22 may include at least one of a battery management module, a relay, a fuse, and a connector, and the second device group 23 may include at least one of a voltage conversion module, a display, and a light panel.

[0032] In a specific embodiment, the first device group 22 and the second device group 23 are located outside and connected to the housing 11. The connection between the first device group 22 and the second device group 23 and the housing 11 can be direct or indirect. The first device group 22 and the second device group 23 are also electrically connected to the battery module 21. Optionally, the electrical connection between the first device group 22 and the second device group 23 and the battery module 21 can be wired or wireless.

[0033] The battery pack 100 provided by this utility model solves the compatibility problem between the first device group 22 and the second device group 23 and the insulating coolant in the submersible battery pack 100 by mounting the first device group 22 and the second device group 23 outside the housing 11. This reduces the number of components immersed in the insulating coolant, lowers the selection cost of the battery pack 100, and reduces the risk during use. At the same time, by setting the first device group 22 and the second device group 23 on different first surfaces 18 and second surfaces 19, the heat generated by the accumulation of the first device group 22 and the second device group 23 can be reduced, the heat dissipation efficiency outside the housing 11 can be improved, and the thermal runaway problem of the components in the battery pack 100 can be reduced.

[0034] Furthermore, by mounting the first component group 22 and the second component group 23 outside the housing 11, this utility model also facilitates the maintenance of components during subsequent use, especially for the submersible battery pack 100, reducing the impact of insulating coolant on maintenance; when the components in the first component group 22 and the second component group 23 are damaged, there is no need to open the housing 11, which not only improves maintenance efficiency but also ensures the sealing of the inside of the housing 11.

[0035] For some implementation methods, please refer to Figures 2-4 The first surface 18 and the second surface 19 are opposite to each other along the first direction 001. The first device group 22 is electrically connected to the battery module 21, and the second device group 23 is electrically connected to the first device group 22. Specifically, the first side plate 14 includes the first surface 18, and the second side plate 15 includes the second surface 19, so the first surface 18 and the second surface 19 are opposite to each other along the first direction 001. The first device group 22 can be wired or wirelessly connected to the battery module 21, and the second device group 23 can be wired or wirelessly connected to the first device group 22.

[0036] This invention, by setting the first device group 22 and the second device group 23 at opposite ends of the housing 11, can not only disperse the heat of the battery pack 100, but also make the battery pack 100 meet the requirements for cabinet installation. The tail end of the battery pack 100 (at the first surface 18) can be used to connect the charging and discharging wires, and the front end of the battery pack 100 (at the second surface 19) can be used to display the status of the battery pack 100.

[0037] For some implementation methods, please refer to Figure 3 and Figure 4 The battery pack 100 also includes a first sealing plate 31 and a second sealing plate 32, with a first surface 18 facing the first sealing plate 31 and a second surface 19 facing the second sealing plate 32. A first device group 22 is located between the first sealing plate 31 and the first surface 18 and is connected to the first surface 18. A second device group 23 is located between the second sealing plate 32 and the second surface 19 and is connected to the second sealing plate 32.

[0038] In a specific embodiment, the first sealing plate 31 is used to encapsulate and fix the first device group 22, and the second sealing plate 32 is used to encapsulate and fix the second device group 23. The first sealing plate 31 is located on the side of the first side plate 14 facing away from the second side plate 15, and the second sealing plate 32 is located on the side of the second side plate 15 facing away from the first side plate 14. A space may exist between the first sealing plate 31 and the first side plate 14 for placing the first device group 22; a space may also exist between the second sealing plate 32 and the second side plate 15 for placing the second device group 23.

[0039] In a specific embodiment, the first device group 22 is mounted on the first side plate 14, that is, the first device group 22 is directly connected to the first side plate 14. Optionally, the first device group 22 can be fixed to the first side plate 14 by bolts or adhesive. The first sealing plate 31 can be directly or indirectly connected to the housing 11. The first sealing plate 31 is used to encapsulate the first device group 22 and prevent the first device group 22 from being exposed.

[0040] In a specific embodiment, the second device group 23 is mounted on the second sealing plate 32, that is, the second device group 23 is directly connected to the second sealing plate 32. Optionally, the second device group 23 can be fixed to the second sealing plate 32 by bolts or adhesive. The second sealing plate 32 can be directly or indirectly connected to the housing 11. The second sealing plate 32 is used to encapsulate the second device group 23 and prevent the second device group 23 from being exposed.

[0041] In a specific embodiment, please refer to Figure 4 The first device group 22 includes a (blind-mating) connector for connecting to a wire, through which the battery pack 100 can be charged and discharged. A first opening 313 is provided on the first cover plate 31, through which the connector is exposed to the external environment. It is understood that the connector is not completely covered by the first cover plate 31; the connector is exposed to facilitate the user connecting the wire to the connector.

[0042] In a specific embodiment, the second device group 23 includes a display and a light panel. The display shows information about the battery pack 100, and the light panel has an indicator light that can alert the user through its color. The second sealing plate 32 has a second opening 321 and a third opening 322. The display surface of the display is exposed to the external environment through the second opening 321, and the indicator light of the light panel is exposed to the external environment through the third opening 322. It is understood that both the display and the light panel require user recognition, so exposing parts of the display and the light panel facilitates user understanding of the battery pack 100's status.

[0043] This utility model provides a first sealing plate 31 and a second sealing plate 32 in the battery pack 100, and uses the first sealing plate 31 and the second sealing plate 32 to encapsulate and fix the first device group 22 and the second device group 23, which can prevent the first device group 22 and the second device group 23 from being exposed to the outside, and protect the device group with the sealing plate; it can also enhance the external structural strength of the battery pack 100.

[0044] For some implementation methods, please refer to Figure 3 and Figure 4 The battery pack 100 also includes a third sealing plate 33 and a fourth sealing plate 34 disposed opposite to each other along the second direction 002. The housing 11 is located between the third sealing plate 33 and the fourth sealing plate 34. There is a first wiring space between the third sealing plate 33 and the side plate of the housing 11, and there is a second wiring space between the fourth sealing plate 34 and the side plate of the housing 11. The first direction 001 and the second direction 002 intersect.

[0045] In a specific embodiment, the first device group 22 and the second device group 23 are electrically connected via a connecting line. The third sealing plate 33 is located on the side of the third side plate 16 facing away from the fourth side plate 17, and the fourth sealing plate 34 is located on the side of the fourth side plate 17 facing away from the third side plate 16. A first wiring space may be provided between the third sealing plate 33 and the third side plate 16, and a second wiring space may be provided between the fourth sealing plate 34 and the fourth side plate 17. The connecting line between the first device group 22 and the second device group 23 is accommodated in the first wiring space and the second wiring space.

[0046] This utility model, by setting a third sealing plate 33 and a fourth sealing plate 34 in the battery pack 100, can create a first wiring space and a second wiring space. The wiring outside the housing 11 can be accommodated in the first wiring space and the second wiring space, thereby achieving the effect of preventing wiring leakage and protecting the wiring.

[0047] For some implementation methods, please refer to Figure 4 The third sealing plate 33 is connected to the first sealing plate 31 and the second sealing plate 32 at its two ends opposite to each other along the first direction 001, and the fourth sealing plate 34 is connected to the first sealing plate 31 and the second sealing plate 32 at its two ends opposite to each other along the first direction 001. Specifically, both ends of the third sealing plate 33 and the fourth sealing plate 34 are fastened to the first sealing plate 31 and the second sealing plate 32 by fasteners.

[0048] In a specific embodiment, please refer to Figure 4 The third sealing plate 33 and the fourth sealing plate 34 can have the same shape, that is, the third sealing plate 33 and the fourth sealing plate 34 are mirror images of each other. Therefore, the third sealing plate 33 and the fourth sealing plate 34 have the same structure. The following description uses only the third sealing plate 33 as an example. The third sealing plate 33 includes a plate body, a first flange 331 and a second flange 332. The first flange 331 and the second flange 332 are located at opposite ends of the plate body along the first direction 001. The first flange 331 is connected to the first sealing plate 31, and the second flange 332 is connected to the second sealing plate 32.

[0049] In a specific embodiment, the plate body is parallel to the third side plate 16, the first flange 331 and the plate body are connected at an angle, and the second flange 332 and the plate body are connected at an angle. The first flange 331 and the second flange 332 can be parallel to the first sealing plate 31 and the second sealing plate 32, respectively. The first flange 331 and the second flange 332 are provided with screw holes, and the first sealing plate 31 and the second sealing plate 32 are provided with corresponding screw holes. The fastener can be a bolt, which passes through the first sealing plate 31 and the first flange 331 to lock and fix them.

[0050] This utility model not only achieves the purpose of fixing the four sealing plates by locking the first sealing plate 31 and the second sealing plate 32 to the two ends of the third sealing plate 33 and the fourth sealing plate 34, but also reduces the number of openings on the housing 11; when the battery pack 100 is submerged, it improves the sealing performance inside the housing 11 and avoids leakage of insulating coolant.

[0051] For some implementation methods, please refer to Figure 2 and Figure 4 The battery pack 100 also includes a first mounting beam 41 and a second mounting beam 42, which are connected to the outer surface of the housing 11. The first mounting beam 41 and the second mounting beam 42 are spaced apart along the height direction 003 of the housing 11. The second sealing plate 32 connects the first mounting beam 41 and the second mounting beam 42. The first direction 001 and the height direction 003 intersect.

[0052] In a specific embodiment, the first mounting beam 41 and the second mounting beam 42 are connected to one side of the second side plate 15 of the housing 11, and are spaced apart along the height direction 003 of the housing 11. It is understood that the first mounting beam 41 and the second mounting beam 42 protrude from the second surface 19, and the second sealing plate 32 connects the first mounting beam 41 and the second mounting beam 42, thereby forming the aforementioned space between the second sealing plate 32 and the second side plate 15.

[0053] In a specific embodiment, the first mounting beam 41 and the second mounting beam 42 can be bolted to the outer surface of the housing 11, and the second sealing plate 32 can be bolted to the first mounting beam 41 and the second mounting beam 42. Then, one end of the third sealing plate 33 and the fourth sealing plate 34 is bolted to the second sealing plate 32, and the first sealing plate 31 is bolted to the other end of the third sealing plate 33 and the fourth sealing plate 34, so that all four sealing plates are fixed to the outer periphery of the housing 11.

[0054] This invention connects a first mounting beam 41 and a second mounting beam 42 to the outer surface of the housing 11, which can not only be used to fix the second sealing plate 32, but also create space for mounting the second device group 23 by utilizing the protruding first mounting beam 41 and the second mounting beam 42.

[0055] For some implementation methods, please refer to Figure 6 and Figure 7 The second cover plate 32 also includes a handle 323, which is connected to the side of the second cover plate 32 facing away from the second surface 19. There are two handles 323, and the purpose of setting the handles 323 is to improve the convenience of the user to take the battery pack 100.

[0056] For some implementation methods, please refer to Figure 5A wiring hole 20 is provided on the first surface 18, which connects the internal and external spaces of the housing 11. The battery pack 100 also includes a connecting wire (not shown in the figure), which passes through the wiring hole 20 to connect the battery module 21 and the first device group 22. Specifically, the battery module 21 and the first device group 22 are electrically connected by the connecting wire. A through wiring hole 20 is provided on the first side plate 14, through which the connecting wire passes to extend from the internal space of the housing 11 into the space between the two sides.

[0057] In a specific embodiment, the connecting wire passes through the wiring hole 20 and connects the battery module 21 and the first device group 22. The first device group 22 and the second device group 23 are also electrically connected by another connecting wire. The connecting wire for connecting the first device group 22 and the second device group 23 passes through the first wiring space and the second wiring space. In this way, only the first surface 18 needs to be opened on the housing 11, thereby minimizing the number of openings.

[0058] For some implementation methods, please refer to Figure 5 The wiring holes include a first wiring hole 201 and a second wiring hole 202, and the connecting wires include a first connecting wire and a second connecting wire. The first connecting wire passes through the first wiring hole 201 to connect the battery module 21 and the first device group 22; the second connecting wire passes through the second wiring hole 202 to connect the battery module 21 and the first device group 22.

[0059] In a specific embodiment, the first wiring hole 201 and the second wiring hole 202 are respectively used for passing through different connecting lines, wherein the first connecting line can be a power line and the second connecting line can be a communication line. The first connecting line and the second connecting line are respectively used for electrically connecting different components in the first device group 22. Optionally, the first wiring hole 201 and the second wiring hole 202 are spaced apart along the second direction 002.

[0060] In a specific embodiment, the first device group 22 and the second device group 23 can also be electrically connected via power lines and communication lines. The power lines connecting the first device group 22 and the second device group 23 can pass through a first wiring space, and the communication lines connecting the first device group 22 and the second device group 23 can pass through a second wiring space.

[0061] This utility model provides a first wiring hole 201 and a second wiring hole 202 on the first surface, with the first wiring hole 201 and the second wiring hole 202 respectively used for passing through different first connecting lines and second connecting lines. This can avoid mutual interference between the first connecting lines and the second connecting lines and ensure the stability of power transmission and signal transmission.

[0062] In some embodiments, the battery pack 100 also includes a sealing element (not shown in the figure), which is disposed in the wiring hole 20 and used to seal any gaps remaining after the connecting wire passes through the wiring hole 20. Specifically, the sealing element may include fire-retardant putty and waterproof adhesive. After the connecting wire passes through the wiring hole 20, the sealing element can be placed on the wiring hole 20 to seal any gaps remaining after the connecting wire passes through the wiring hole 20. This allows the battery pack 100 to meet the IP67 protection rating.

[0063] For some implementation methods, please refer to Figure 2 The housing 11 includes a top cover 12 and a housing body 13. The top cover 12 is connected to the housing body 13, and an explosion-proof valve 121 is provided on the top cover 12. Specifically, the top cover 12 can be the top plate mentioned above, and the housing body 13 includes a bottom plate and four side plates. The top cover 12 is used to connect the housing body 13 so as to seal the internal space of the housing 11. The explosion-proof valve 121 is provided on the top cover 12, and the explosion-proof valve 121 is used to open and release pressure when the internal air pressure of the housing 11 increases.

[0064] In a specific embodiment, the shell body 13 has an outer peripheral flange 131, which is located on the side of the shell body 13 facing away from the bottom plate along the height direction 003. The outer peripheral flange 131 is annular and connects to four side plates. The top cover 12 is connected to the outer peripheral flange 131, and the top cover 12 and the outer peripheral flange 131 are fastened together by fasteners. Optionally, both the top cover 12 and the outer peripheral flange 131 have multiple screw holes arranged in a ring to lock the top cover 12 and the shell body 13.

[0065] In a specific embodiment, the first mounting beam 41 described above is connected to the top cover 12, and the second mounting beam 42 is connected to the shell body 13. Optionally, the first mounting beam 41 and the top cover 12 are detachably connected and can be bolted together; the second mounting beam 42 and the bottom edge of the shell body 13 are detachably connected and can be bolted together.

[0066] In a specific embodiment, please refer to Figure 4 The third sealing plate 33 also includes a third flange 333 and a fourth flange 334, which are located at opposite ends of the plate body of the third sealing plate 33 along the height direction 003. Optionally, the third flange 333 and the fourth flange 334 are parallel to the bottom plate of the top cover 12 and the shell body 13, respectively. It is understood that the third flange 333 and the fourth flange 334 can be used to protect the connecting wires in the height direction 003. In addition, the third flange 333 is also used to abut against the outer peripheral flange 131 mentioned above.

[0067] In a specific embodiment, please refer to Figure 4The first sealing plate 31 includes a plate body, a fifth flange 311, and a sixth flange 312, which are located at opposite ends of the plate body along the height direction 003. Optionally, the fifth flange 311 and the sixth flange 312 are parallel to the bottom plate of the top cover 12 and the shell body 13, respectively. It is understood that the fifth flange 311 and the sixth flange 312 can be used to protect the first device group 22 in the height direction 003. In addition, the fifth flange 311 is also used to abut against the outer peripheral flange 131 mentioned above.

[0068] In a specific embodiment, please refer to Figure 2 The housing 11 also includes a sealing strip 51, which is disposed between the top cover 12 and the outer periphery flange 131 of the housing body 13. The sealing strip 51 is used to ensure the airtightness of the space inside the housing 11.

[0069] This utility model also provides an energy storage system, including an electrical device and a battery pack 100 as described in the above embodiments. The battery pack 100 is electrically connected to the electrical device and is used to supply power to the electrical device.

[0070] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0071] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A battery pack (100), characterized by, The battery pack (100) comprises: a shell (11) comprising a first surface (18) and a second surface (19); a battery module (21) accommodated in the shell (11); a first device group (22) mounted outside the shell (11) and located on the first surface (18); a second device group (23) mounted outside the shell (11) and located on the second surface (19); the first device group (22) and the second device group (23) are electrically connected with the battery module (21).

2. The battery pack (100) according to claim 1, characterized in that, The first surface (18) and the second surface (19) are opposite along a first direction (001), the first device group (22) is electrically connected with the battery module (21), and the second device group (23) is electrically connected with the first device group (22).

3. The battery pack (100) according to claim 2, characterized in that, The battery pack (100) further comprises a first sealing plate (31) and a second sealing plate (32), the first surface (18) faces the first sealing plate (31), the second surface (19) faces the second sealing plate (32), the first device group (22) is located between the first sealing plate (31) and the first surface (18) and connected with the first surface (18); and the second device group (23) is located between the second sealing plate (32) and the second surface (19) and connected with the second sealing plate (32).

4. The battery pack (100) according to claim 3, characterized in that, The battery pack (100) further comprises a third sealing plate (33) and a fourth sealing plate (34) arranged opposite along a second direction (002), the shell (11) is located between the third sealing plate (33) and the fourth sealing plate (34), the third sealing plate (33) and the side plate of the shell (11) have a first wiring space, the fourth sealing plate (34) and the side plate of the shell (11) have a second wiring space, and the first direction (001) and the second direction (002) intersect; the third sealing plate (33) is connected with the first sealing plate (31) and the second sealing plate (32) at two ends opposite along the first direction (001), and the fourth sealing plate (34) is connected with the first sealing plate (31) and the second sealing plate (32) at two ends opposite along the first direction (001).

5. The battery pack (100) of claim 3, wherein, The battery pack (100) further comprises a first mounting beam (41) and a second mounting beam (42), the first mounting beam (41) and the second mounting beam (42) are connected to the outer surface of the shell (11), the first mounting beam (41) and the second mounting beam (42) are arranged at intervals along the height direction (003) of the shell (11), the second sealing plate (32) is connected with the first mounting beam (41) and the second mounting beam (42), and the first direction (001) and the height direction (003) intersect.

6. The battery pack (100) according to any one of claims 1-5, characterized in that, The first surface (18) is provided with a wiring hole (20), the wiring hole (20) communicates the inside and the outside of the shell (11), and the battery pack (100) further comprises a connecting line, the connecting line passes through the wiring hole (20) to connect the battery module (21) and the first device group (22).

7. The battery pack (100) according to claim 6, characterized in that The wiring hole (20) comprises a first wiring hole (201) and a second wiring hole (202), the connecting line comprises a first connecting line and a second connecting line, the first connecting line passes through the first wiring hole (201) to connect the battery module (21) and the first device group (22); the second connecting line passes through the second wiring hole (202) to connect the battery module (21) and the first device group (22).

8. The battery pack (100) of claim 6, wherein, The battery pack (100) further comprises a blocking piece, the blocking piece is arranged in the wiring hole, and the blocking piece is used for blocking the gap left after the connecting line passes through the wiring hole.

9. The battery pack (100) according to any one of claims 1-5, characterized in that, The first device group (22) comprises at least one of a battery management module, a relay, a fuse and a connector, and the second device group (23) comprises at least one of a voltage conversion module, a display and a lamp plate. And / or, the shell (11) further contains an insulating cooling liquid, the battery module (21) is soaked in the insulating cooling liquid, and the battery module (21) comprises cylindrical batteries and / or square batteries.

10. An energy storage system characterized by, The energy storage system comprises an electric device and the battery pack (100) according to any one of claims 1-9, the battery pack (100) and the electric device are electrically connected, and the battery pack (100) is used for supplying power to the electric device.

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