Energy storage device

Abstract

The embodiment of the invention provides an energy storage device which comprises a box body structure, the box body structure comprises a power shell and a battery shell which are adjacently arranged in the front-back direction, a first installation opening is formed in the side, facing the battery shell, of the power shell, and a second installation opening is formed in the side, facing the power shell, of the battery shell; the battery shell and the power shell are detachably connected through the first mounting opening and the second mounting opening; the power circuit board is arranged in the power shell, and the power circuit board is connected with the power shell; and the battery module is arranged in the battery shell, and the battery module is electrically connected with the power circuit board. According to the technical scheme, when the battery module with the large weight is installed in the battery shell, hoisting is not needed, only the battery module needs to be pushed into the battery shell in the front-back direction, dependence on hoisting equipment is reduced, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and more particularly, to an energy storage device. Background Art

[0002] With the continuous popularization of green energy, the demand for arranging photovoltaic power generation and corresponding energy storage batteries at home is gradually increasing. Generally, the balcony part indoors receives a relatively large proportion of sunlight, and a balcony photovoltaic energy storage system can be arranged on the balcony of a building. The balcony photovoltaic energy storage device usually includes a photovoltaic power generation system and an energy storage system. Among them, the photovoltaic power generation system uses photovoltaic panels to convert solar energy into direct current electrical energy, and the energy storage system generally uses energy storage devices such as storage batteries or lithium batteries to store the excess electrical energy for emergencies. In related technologies, due to the relatively large weight of the battery module, the operation difficulty is relatively large during assembly, the installation is laborious, and even in some installation scenarios, hoisting equipment is used to assist in installation, resulting in low assembly efficiency. Summary of the Invention

[0003] In order to solve or improve the technical problem of the relatively low production and assembly efficiency of the above-mentioned energy storage device, an object of the present invention is to provide an energy storage device.

[0004] To achieve the above object, the present invention provides an energy storage device, including: a box body structure, the box body structure includes a power housing and a battery housing arranged adjacent to each other in the front-rear direction, a first installation port is provided on the side of the power housing facing the battery housing, a second installation port is provided on the side of the battery housing facing the power housing, and the battery housing and the power housing are detachably connected through the first installation port and the second installation port; a power circuit board, arranged in the power housing, and the power circuit board is connected to the power housing; a battery module, arranged in the battery housing, and the battery module is electrically connected to the power circuit board.

[0005] According to the energy storage device provided by the present invention, it includes a box body structure and a power circuit board and a battery module arranged in the box body structure. Among them, through modular design in the front-rear direction, the power housing and the battery housing are arranged adjacent to each other in the front-rear direction. When installing the relatively heavy battery module into the battery housing, no hoisting is required, and only the battery module needs to be pushed into the battery housing along the front-rear direction. Compared with the existing energy storage device whose housing adopts an up-down structure, during the production line installation process, the battery module needs to be transported to a certain height before it can be placed into the lower housing of the energy storage device. Due to the relatively large weight of the battery module, it is relatively laborious for production line workers, and even hoisting equipment is needed. When installing the battery module, it needs to be lifted to the installation port above the housing before it can be installed into the housing, resulting in high installation costs and low installation efficiency. The solution of the present application can effectively reduce the dependence on hoisting equipment and improve the assembly efficiency.

[0006] Specifically, the box structure includes a power shell and a battery shell. The power shell and the battery shell are respectively provided with a first mounting port and a second mounting port on the opposite sides, that is, the power shell and the battery shell are adjacent to each other in the front-to-back direction. The first mounting port is opened on the contact surface of the power shell, and the second mounting port is opened on the contact surface of the battery shell. After installation, a battery module is arranged in the battery shell, and a power circuit board is arranged in the power shell. The power circuit board and the battery module (heat-sensitive) are arranged in compartments. Since the power circuit board will generate greater electromagnetic interference during operation, and the battery module is more sensitive to electromagnetic interference, the mutual interference between the two can be reduced by compartmenting.

[0007] In the above technical solution, the battery housing further comprises: an assembly step, which is arranged on the bottom wall of the battery housing, one end of which forms part of the second installation opening, and the battery module enters the battery housing through the assembly step.

[0008] In this solution, an assembly step is added to the bottom wall of the battery housing, and the pushing path and load-bearing stability of the battery module can be optimized through the stepped guide support design, wherein the assembly step is located at the rear end of the bottom wall of the battery housing, that is, close to the second mounting port side, wherein one end of the assembly step forms a partial structure of the second mounting port, specifically, the rear end of the assembly step can be combined with other structures to form the second mounting port, and the assembly step serves as the bottom edge area of ​​the second mounting port.

[0009] In the above technical solution, the battery housing further comprises: at least one assembly beam, which is arranged on the bottom wall of the battery housing, and the assembly beam extends in the front-to-back direction, one end of the assembly beam abuts against the assembly step, and the other end of the assembly beam abuts against the front wall of the battery housing.

[0010] One or more assembly beams are added to the bottom wall of the battery shell. The bearing capacity and structural stability of the bottom wall of the shell are enhanced through the longitudinal rigid support design. The front end of the assembly beam is fixed to the inner surface of the front wall of the battery shell, and the rear end is abutted against the side wall of the assembly step to form a continuous path to facilitate the smooth insertion of the battery module.

[0011] In the above technical solution, the energy storage device also includes: a battery management and protection board, at least part of which is arranged in the power housing, and the battery management and protection board is arranged on the side of the power circuit board facing the first mounting port; wherein the battery management and protection board is electrically connected to the battery module.

[0012] By disposing part or all of the structure of the battery management protection board in the power housing, and disposing it on the side of the power circuit board facing the first mounting port (i.e., close to the mating surface of the battery housing), the distance between the battery management protection board and the power circuit board is small, so that structures such as the battery management protection board and the power circuit board are arranged centrally. When the two are connected, the wiring harness distance is short, which reduces interference and also shortens unnecessary wiring harnesses.

[0013] In the above technical solution, the energy storage device further includes: a support plate disposed between the battery management and protection board and the power circuit board. The support plate is detachably connected to the power housing, and the battery management and protection board is connected to the support plate.

[0014] By providing a support plate detachably connected to the power housing within the power housing, and arranging the battery management and protection board and the power circuit board on both sides of the support plate respectively, on the one hand, electromagnetic interference between the battery management and protection board and the power circuit board can be reduced to ensure the normal operation of the circuit board. On the other hand, under the action of the support plate, a certain heat insulation effect can be achieved, so that the heat of the power circuit board and the heat of the battery management and protection board are separated as much as possible, and at the same time, heat transfer to the battery module is also reduced.

[0015] In the above technical solution, a plurality of first connection columns are provided on the support plate, first connection holes are provided inside the first connection columns, second connection holes are provided on the battery management and protection board, and a first connecting member passes through the second connection holes and is threadedly connected to the first connection holes.

[0016] The battery management and protection board is fixed to the support plate through threaded cooperation. Specifically, first connection columns are provided on the support plate, and a first connection hole with threads is provided at one end of the first connection column. By providing second connection holes on the battery management and protection board, under the action of the first connecting member, the battery management and protection board can be connected to the support plate, thereby realizing the detachable connection between the battery management and protection board and the support plate.

[0017] In the above technical solution, the plane where the battery management and protection board is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold; the plane where the support plate is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold; the plane where the board body of the power circuit board is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold.

[0018] By respectively limiting the planes corresponding to the battery management and protection board, the support plate and the board body of the power circuit board and the plane corresponding to the first mounting opening, the three boards can be stacked on top of each other in the front-rear direction, reducing unnecessary space waste, improving space utilization rate, making the size of the entire energy storage device smaller in the front-rear direction and having a higher degree of integration.

[0019] In the above technical solution, the power circuit board includes: a board body; a plurality of components disposed on one side of the board body facing the power housing. An insulating and heat-conducting structure is provided between some of the plurality of components and the inner wall of the power housing, and a gap exists between the other part of the plurality of components and the inner wall of the power housing.

[0020] The power circuit board includes a board body and a plurality of components. The plurality of components are arranged on the rear side of the board body, that is, on the side facing away from the first mounting opening of the power housing. By dividing the components on the board body, a part of the components can be attached to the inner wall of the power housing through an insulating and heat-conducting structure, and the insulating and heat-conducting structure directly conducts heat to the power housing. Another part of the components has a certain gap with the inner wall, and the gap forms a natural convection channel.

[0021] In the above technical solution, the energy storage device further includes: a third connecting column provided on the power housing, and a third connecting hole is provided inside the third connecting column; a fourth connecting hole is provided on the board body; wherein, the second connecting member passes through the fourth connecting hole and is threadedly connected to the third connecting hole.

[0022] The power circuit board is fixed to the power housing through threaded cooperation. Specifically, a third connecting column is provided on the power housing, and a threaded third connecting hole is provided at one end of the third connecting column. By providing a fourth connecting hole on the board body of the power circuit board, under the action of the second connecting member, the power circuit board can be connected to the power housing, thereby realizing the detachable connection between the power circuit board and the power housing.

[0023] In the above technical solution, the energy storage device further includes: heat dissipation fins provided on the side wall surface of the power housing away from the first mounting opening; wherein, the heat dissipation fins are integrally formed with the power housing.

[0024] By arranging the heat dissipation fins on the rear side of the power housing, that is, on the side wall surface away from the first mounting opening, and integrally processing and manufacturing the heat dissipation fins and the power housing, the unnecessary dimensional redundancy in the front-rear direction of the overall device can be greatly simplified. There is no need to separately set the heat dissipation fins, maximizing space savings and meeting the user's demand for product miniaturization.

[0025] The additional aspects and advantages of the technical solution of the present invention will become obvious in the following description part, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shows a schematic structural diagram of an energy storage device according to an embodiment of the present invention;

[0027] Figure 2 Shows a schematic structural diagram of a battery housing according to an embodiment of the present invention;

[0028] Figure 3 Shows a schematic structural diagram of an energy storage device according to an embodiment of the present invention;

[0029] Figure 4 Shows an exploded structural diagram of an energy storage device according to an embodiment of the present invention;

[0030] Figure 5 The structural schematic diagram of a power housing according to an embodiment of the present invention is shown;

[0031] Figure 6 The structural schematic diagram of a power circuit board according to an embodiment of the present invention is shown;

[0032] Figure 7 The structural schematic diagram of a battery management and protection board according to an embodiment of the present invention is shown;

[0033] Figure 8 The assembly structural schematic diagram of a support board and a battery management and protection board according to an embodiment of the present invention is shown;

[0034] Figure 9 The schematic diagram of an energy storage system according to an embodiment of the present invention is shown;

[0035] Figure 10 The schematic diagram of an energy storage system according to an embodiment of the present invention is shown.

[0036] Wherein, Figures 1 to 10 The corresponding relationship between the reference numerals and the component names in the figures is as follows:

[0037] 100: energy storage device; 102: box structure; 104: power housing; 1042: first mounting opening; 1044: third connecting column; 1046: third connecting hole; 106: battery housing; 1062: second mounting opening; 108: power circuit board; 1082: board body; 1083: fourth connecting hole; 1084: components; 110: battery module; 1122: assembly step; 1124: assembly beam; 114: battery management and protection board; 1142: second connecting hole; 116: support board; 1162: first connecting column; 1164: first connecting hole; 118: heat dissipation fin; 1202: handle groove; 1204: handle structure; 122: connection terminal;

[0038] 200: energy storage system; 202: power-on device. Detailed implementation manners

[0039] In order to be able to more clearly understand the above objects, features and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0040] Many specific details are set forth in the following description in order to fully understand the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the limitations of the specific embodiments disclosed below.

[0041] The following will refer to Figures 1 to 10 to describe the energy storage device provided according to some embodiments of the present invention.

[0042] As Figure 1 and Figure 4 shown, this embodiment provides an energy storage device 100, which includes a box structure 102, a power circuit board 108 and a battery module 110 disposed in the box structure 102. Among them, through modular design in the front-rear direction, the power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-rear direction. When installing the relatively heavy battery module 110 into the battery housing 106, there is no need for hoisting. Only the battery module 110 needs to be pushed into the battery housing 106 in the front-rear direction. Compared with the existing energy storage device whose housing adopts an up-down structure, during the production line installation process, the battery module 110 needs to be transported to a certain height before it can be placed into the lower housing of the energy storage device. Since the battery module 110 is relatively heavy, it will be quite strenuous for the production line workers, and even hoisting equipment is needed. When installing the battery module 110, it needs to be lifted to the installation opening above the housing to install the battery module 110 into the housing, resulting in high installation costs and low installation efficiency. The solution of this application can effectively reduce the dependence on hoisting equipment and improve the assembly efficiency.

[0043] Specifically, the box structure 102 includes a power housing 104 and a battery housing 106. The power housing 104 and the battery housing 106 are respectively provided with a first installation opening 1042 and a second installation opening 1062 on the opposite sides. That is, the power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-rear direction. The first installation opening 1042 is opened on the contact surface of the power housing 104, and the second installation opening 1062 is opened on the contact surface of the battery housing 106. After installation, the battery module 110 is arranged in the battery housing 106, and the power circuit board 108 is arranged in the power housing 104. Through the (heat-sensitive) compartment layout of the power circuit board 108 and the battery module 110, since the power circuit board 108 will generate relatively large electromagnetic interference during operation, and the battery module 110 is relatively sensitive to electromagnetic interference, through compartmentalization, the mutual interference between the two can be reduced.

[0044] It should be added that the power housing 104 and the battery housing 106 are horizontally arranged adjacent to each other in the front-rear direction, and their contact surfaces are flush, presenting an overall "side-by-side double compartment" structure. When assembling the battery module 110, the battery module 110 can be horizontally pushed into the second installation opening 1062, and there is no displacement requirement in the gravity direction, completely eliminating the lifting action.

[0045] The first mounting opening 1042 and the second mounting opening 1062 are detachably connected to achieve assembly between the power housing 104 and the battery housing 106. Specifically, holes can be opened at the edge of the first mounting opening 1042 and at the corresponding position of the second mounting opening 1062, and assembly can be achieved by bolts or rivets.

[0046] Furthermore, electromagnetic shielding springs may be arranged in the first installation opening 1042 and the second installation opening 1062 , and beryllium copper alloy may be used. The contact pressure of the electromagnetic shielding springs is selected to be 15N / cm, and the shielding effectiveness is ≥60dB (30MHz-1GHz).

[0047] Furthermore, high-voltage interlocking terminals are provided in the first mounting opening 1042 and the second mounting opening 1062 , which automatically connect the high-voltage circuit when the battery module 110 is inserted, and disconnect the high-voltage circuit when the battery module 110 is removed.

[0048] In some embodiments, optionally, Figure 2 As shown, an assembly step 1122 is added to the bottom wall of the battery housing 106. Through the stepped guide support design, the pushing path and bearing stability of the battery module 110 can be optimized, wherein the assembly step 1122 is located at the rear end of the bottom wall of the battery housing 106, that is, close to the second mounting port 1062 side, wherein one end of the assembly step 1122 forms a partial structure of the second mounting port 1062, specifically, the rear end of the assembly step 1122 can be surrounded by other structures to form the second mounting port 1062, and the assembly step 1122 serves as the bottom edge area of ​​the second mounting port 1062.

[0049] Furthermore, the entire battery housing 106 can be formed by bending a whole plate 1082 through sheet metal, and the assembly step 1122 can also be formed by bending the sheet metal, thereby forming a part of the second installation opening 1062 .

[0050] Furthermore, the assembly step 1122 is a slope transition structure, for example, it may be 10 mm, and the slope angle may be 15°.

[0051] Furthermore, the surface of the assembly step 1122 may be additionally covered with a wear-resistant nylon lining.

[0052] Furthermore, the assembly step 1122 can be a slope, and the rear end of the assembly step 1122 extends to the edge of the second installation port 1062 to form a continuous guide surface. When the battery module 110 is pushed in, it first contacts the slope of the assembly step 1122 and then smoothly transitions into the shell.

[0053] Furthermore, the height difference between the rear end of the assembly step 1122 and the slide rail in the housing is 0, so as to avoid bumping or jamming when the battery module 110 is pushed in.

[0054] It should be added that when the battery module 110 is heavy and has a long span at the bottom, relying solely on the slide rails inside the housing may cause the deformation of the module frame due to the sagging in the middle. In this solution, by setting the assembly step 1122, an additional support point is provided at the initial stage of pushing the battery module 110, sharing the load with the bottom wall inside the housing and reducing the mid-span bending moment.

[0055] In some embodiments, optionally, one or more assembly beams 1124 are added to the bottom wall of the battery housing 106. Through the longitudinal rigid support design, the load-bearing capacity and structural stability of the bottom wall of the housing are strengthened. The front end of the assembly beam 1124 is fixed to the inner surface of the front wall of the battery housing 106, and the rear end abuts against the side wall of the assembly step 1122 to form a continuous path for the smooth pushing of the battery module 110.

[0056] Furthermore, the assembly beam 1124 can be selected as a finished profile for cutting and processing to reduce the processing cost.

[0057] The cross-section of the assembly beam 1124 can be selected as an inverted T shape.

[0058] Furthermore, the upper surface of the assembly beam 1124 is flush with the upper surface of the assembly step 1122 to facilitate the pushing of the battery module 110.

[0059] In some embodiments, optionally, as Figure 3 shown, the battery management and protection board 116 is provided. Part or all of the structure of the battery management and protection board 114 is arranged inside the power housing 104 and is arranged on the side of the power circuit board 108 facing the first mounting opening 1042 (i.e., close to the docking surface of the battery housing 106), with a small distance from the power circuit board 108. Structures such as the battery management and protection board 114 and the power circuit board 108 are arranged in a concentrated manner. When connecting the two, the wire harness distance is short, and a board-to-board connector can be used. Only plugging and unplugging operations are required during connection, reducing interference and shortening unnecessary wire harnesses at the same time.

[0060] Furthermore, the battery management and protection board 114 is located in the docking area of the power housing 104 and the battery housing 106. The signal wires of the battery module 110 can be directly connected to the battery management and protection board 114 through the first mounting opening 1042, with a shorter path.

[0061] In some embodiments, optionally, a support plate 116 detachably connected to the power housing 104 is provided inside the power housing 104, and the battery management and protection board 114 and the power circuit board 108 are respectively arranged on both sides of the support plate 116. On the one hand, the electromagnetic interference between the battery management and protection board 114 and the power circuit board 108 can be reduced to ensure the normal operation of the circuit board. On the other hand, under the action of the support plate 116, a certain heat insulation effect can be achieved, so that the heat of the power circuit board 108 and the heat of the battery management and protection board 114 are separated as much as possible, and at the same time, the heat transfer to the battery module 110 is also reduced.

[0062] In addition, the support plate 116 provides fixation for the battery management and protection board 114 to ensure the stability of the position of the battery management and protection board 114 inside the power housing 104.

[0063] Furthermore, if the battery management and protection board 114 is directly fixed to the power housing 104, the vibration of the housing (especially high-frequency vibration) will be directly transmitted to the battery management and protection board 114, resulting in solder joint fatigue or component de-soldering. Using the support plate 116 as an intermediate support can improve the anti-vibration ability of the battery management and protection board 114.

[0064] In some embodiments, optionally, as Figure 7 and Figure 8 shown, the battery management and protection board 114 is fixed to the support plate 116 by thread fitting. Specifically, a first connection post 1162 is provided on the support plate 116, and a first connection hole 1164 with a thread is provided at one end of the first connection post 1162. By providing a second connection hole 1142 on the battery management and protection board 114, under the action of the first connecting member, the battery management and protection board 114 can be connected to the support plate 116, thereby realizing the detachable connection between the battery management and protection board 114 and the support plate 116.

[0065] Furthermore, 4 to 8 first connection posts 1162 can be provided on the support plate 116, which are distributed in a rectangular array. An M3 threaded hole, that is, the first connection hole 1164, is provided inside the first connection post 1162, and a non-threaded second connection hole 1142 is provided at the corresponding position of the battery management and protection board 114. The first connecting member can be a screw, and by tightening the screw, the connection between the support plate 116 and the battery management and protection board 114 can be realized.

[0066] Among them, a 2mm guiding taper angle is provided at the top of the first connection post 1162 to automatically correct the position deviation when inserting into the second connection hole 1142. When the screw serving as the first connecting member is screwed in, the cup head forms a surface contact with the end face of the first connection post 1162 instead of a point contact, preventing the inclination of the battery management and protection board 114.

[0067] Among them, the first connection post 1162 and the support plate 116 can be integrally processed and formed.

[0068] In some embodiments, optionally, the planes corresponding to the plate bodies 1082 of the battery management and protection board 114, the support board 116, and the power circuit board 108 are respectively defined with respect to the plane corresponding to the first mounting opening 1042, so that the three boards can be stacked on top of each other in the front-back direction, reducing unnecessary space waste, improving space utilization, making the size of the entire energy storage device 100 smaller in the front-back direction, and having a higher degree of integration.

[0069] It can be understood that the planes where the plate bodies 1082 of the battery management and protection board 114, the support board 116, and the power circuit board 108 are located and the plane where the first mounting opening 1042 is located can be parallel or have an angle less than a preset threshold. The preset threshold can be 60°, 70°, 80°, and 90°.

[0070] Among them, for the battery management and protection board 114, by defining that the mounting plane is parallel to the plane of the first mounting opening 1042 or the included angle is less than the preset threshold, the battery management and protection board 114 can be oriented towards the docking surface of the battery housing 106. When the interfaces of the battery management and protection board 114 are concentrated on the side close to the first mounting opening 1042, it is convenient for perpendicular docking with the cables of the battery module 110.

[0071] For the support board 116, the plane where the support board 116 is located is parallel to the plane of the first mounting opening 1042 or the included angle is less than the preset threshold. On the one hand, it can simplify the connection between the support board 116 and the power housing 104. On the other hand, it can also make the connection between the battery management and protection board 114 and the support board 116 more convenient. The support board 116 can isolate between the battery management and protection board 114 and the support board 116, ensuring the heat insulation effect and the electromagnetic isolation effect.

[0072] For the power circuit board 108, the plane where the power circuit board 108 is located is parallel to the plane of the first mounting opening 1042 or the included angle is less than the preset threshold. Since both the power circuit board 108 and the support board 116 are fixed on the power housing 104, by restricting the positions of the power circuit board 108 and the support board 116 relative to the power housing 104 to be stacked, it is more convenient for the overall structure to utilize space in the front-back direction.

[0073] In some embodiments, optionally, such as Figure 3As shown in the figure, the power circuit board 108 includes a board body 1082 and a plurality of components 1084. The plurality of components 1084 are arranged on the rear side of the board body 1082, that is, on the side of the power housing 104 away from the first mounting opening 1042. By dividing the components 1084 on the board body 1082, a part of the components 1084 can be attached to the inner wall of the power housing 104 through an insulating and heat-conducting structure. The insulating and heat-conducting structure directly conducts heat to the power housing 104, and another part of the components 1084 has a certain gap from the inner wall, and the gap forms a natural convection channel. Among them, the components 1084 provided with the insulating and heat-conducting structure are mainly high-heat-generating components or low-voltage components, such as MOS transistors, IGBTs, etc., and the components 1084 with a gap from the inner wall are mainly low-heat-generating components, high-voltage components and high-frequency components, such as capacitors, transformers, etc.

[0074] Among them, the insulating and heat-conducting structure includes thermal conductive silicone grease and insulating tapes, insulating gaskets, ceramic substrates, etc. for carrying the thermal conductive silicone grease.

[0075] In some embodiments, optionally, the power circuit board 108 is fixed to the power housing 104 by screw-threaded cooperation. Specifically, as Figure 5 and Figure 6 shown in the figure, a third connecting post 1044 is provided on the power housing 104, and a third connecting hole 1046 with a thread is provided at one end of the third connecting post 1044. By providing a fourth connecting hole 1083 on the board body 1082 of the power circuit board 108, under the action of the second connecting member, the power circuit board 108 can be connected to the power housing 104, thereby realizing the detachable connection between the power circuit board 108 and the power housing 104.

[0076] Furthermore, 6 to 10 third connecting posts 1044 can be provided on the power circuit board 108, distributed in a rectangular array. An M3 threaded hole, that is, the third connecting hole 1046, is provided inside the third connecting post 1044. A fourth connecting hole 1083 without a thread is provided at the corresponding position of the power circuit board 108. The second connecting member can be a screw, and by tightening the screw, the connection between the power circuit board 108 and the power housing 104 can be realized.

[0077] Among them, a 2mm guiding cone angle is provided at the top of the third connecting post 1044 to automatically correct the position deviation when inserting into the fourth connecting hole 1083.

[0078] Among them, the third connecting post 1044 and the power housing 104 can be integrally processed and formed.

[0079] In some embodiments, optionally, as Figure 4As shown, the heat dissipation fins 118 are arranged on the rear side of the power housing 104, that is, on the side wall surface away from the first mounting port 1042, and the heat dissipation fins 118 and the power housing 104 are integrally processed and manufactured, which can greatly simplify the unnecessary dimensional redundancy of the overall device in the front-rear direction, without the need to separately set the heat dissipation fins 118, maximizing space savings and meeting the user's demand for product miniaturization.

[0080] In some embodiments, optionally, as Figure 2 shown, there are also provided: a handle groove 1202, which is arranged on the opposite two wall surfaces of the box body structure 102 in the second direction; a handle structure 1204, which is arranged in the handle groove 1202.

[0081] In some embodiments, optionally, as Figure 3 shown, there are also provided a plurality of connection terminals 122, which are arranged on the left and right wall surfaces of the power housing 104.

[0082] This application also provides an embodiment of an energy storage system 200. At least one power supply device 202 is arranged at the bottom of the energy storage device 100. Specifically, as Figure 9 shown, 1 power supply device 202 is arranged at the bottom of the energy storage device 100 to enhance the power storage capacity of the energy storage system 200, or as Figure 10 shown, 2 power supply devices 202 are arranged at the bottom of the energy storage device 100 to further enhance the power storage capacity.

[0083] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0085] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy storage device, characterized in that, Comprising: A box body structure, the box body structure includes a power housing and a battery housing arranged adjacent to each other in the front-rear direction. On one side of the power housing facing the battery housing, there is a first mounting opening. On one side of the battery housing facing the power housing, there is a second mounting opening. The battery housing and the power housing are detachably connected through the first mounting opening and the second mounting opening; A power circuit board, arranged inside the power housing, and the power circuit board is connected to the power housing; A battery module, arranged inside the battery housing, and the battery module is electrically connected to the power circuit board.

2. The energy storage device according to claim 1, wherein The battery housing further includes: An assembly step, arranged on the bottom wall of the battery housing. One end of the assembly step forms part of the second mounting opening, and the battery module enters the battery housing through the assembly step.

3. The energy storage device according to claim 2, characterized in that, The battery housing further includes: At least one assembly beam, arranged on the bottom wall of the battery housing. The assembly beam extends in the front-rear direction. One end of the assembly beam abuts against the assembly step, and the other end of the assembly beam abuts against the front wall of the battery housing.

4. The energy storage device according to claim 1, characterized in that, The energy storage device further includes: A battery management and protection board, at least part of the battery management and protection board is arranged inside the power housing, and the battery management and protection board is arranged on the side of the power circuit board facing the first mounting opening; Wherein, the battery management and protection board is electrically connected to the battery module.

5. The energy storage device according to claim 4, wherein The energy storage device further includes: A support plate, arranged between the battery management and protection board and the power circuit board. The support plate is detachably connected to the power housing, and the battery management and protection board is connected to the support plate.

6. The energy storage device according to claim 5, wherein A plurality of first connection columns are arranged on the support plate. A first connection hole is arranged inside the first connection column. A second connection hole is arranged on the battery management and protection board. A first connecting member passes through the second connection hole and is threadedly connected to the first connection hole.

7. The energy storage device according to claim 5, characterized in that The plane where the battery management and protection board is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold; The plane where the support plate is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold; The plane where the board body of the power circuit board is located is parallel to the plane where the first mounting opening is located or the included angle is less than a preset threshold.

8. The energy storage device according to any one of claims 1 to 7, characterized in that The power circuit board includes: A board body; A plurality of components, arranged on the side of the board body facing the power housing. An insulating and heat-conducting structure is arranged between some of the plurality of components and the inner wall of the power housing, and there is a gap between the other part of the plurality of components and the inner wall of the power housing.

9. The energy storage device according to claim 8, characterized in that, The energy storage device further includes: A third connection column, arranged on the power housing, and a third connection hole is arranged inside the third connection column; A fourth connection hole, arranged on the board body; Wherein, a second connecting member passes through the fourth connection hole and is threadedly connected to the third connection hole.

10. The energy storage device according to any one of claims 1 to 6, characterized in that, The energy storage device further includes: Heat dissipation fins, arranged on the side wall surface of the power housing away from the first mounting opening; Wherein, the heat dissipation fins are integrally formed with the power housing.

Images