Energy storage device

Abstract

The embodiment of the utility model 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 along the front-back direction, one side, facing the battery shell, of the power shell is provided with a first mounting port, one side, facing the power shell, of the battery shell is provided with a second mounting port, and the first mounting port and the second mounting port are communicated with each other. 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 provided by the utility model, when the battery module with larger weight is mounted in the battery shell, hoisting is not needed, and only the battery module needs to be pushed into the battery shell along the front-back direction, so that the dependence on hoisting equipment is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, and more specifically, to an energy storage device. Background Technology

[0002] With the increasing popularity of green energy, the demand for home photovoltaic systems and corresponding energy storage batteries is gradually increasing. Generally, indoor balconies receive a large proportion of sunlight, making them suitable for installing balcony photovoltaic energy storage systems. Balcony photovoltaic energy storage devices typically include a photovoltaic power generation system and an energy storage system. The photovoltaic power generation system uses photovoltaic panels to convert solar energy into direct current (DC) electricity, while the energy storage system generally uses batteries or lithium batteries to store excess electricity for future use. However, due to the significant weight of the battery modules, assembly is difficult and labor-intensive, sometimes requiring hoisting equipment in some installation scenarios, resulting in low assembly efficiency. Utility Model Content

[0003] In order to solve or improve the technical problem of low production and assembly efficiency of the above-mentioned energy storage device, one objective of this utility model is to provide an energy storage device.

[0004] To achieve the above objectives, this utility model provides an energy storage device, comprising: a housing structure, the housing structure including a power housing and a battery housing arranged adjacent to each other in a front-to-back direction, a first mounting port on the side of the power housing facing the battery housing, and a second mounting port on the side of the battery housing facing the power housing, the battery housing and the power housing being detachably connected through the first mounting port and the second mounting port; a power circuit board disposed inside the power housing and connected to the power housing; and a battery module disposed inside the battery housing and electrically connected to the power circuit board.

[0005] The energy storage device provided by this utility model includes a housing structure and a power circuit board and a battery module disposed within the housing structure. Through a modular design in the front-to-back direction, the power housing and the battery housing are arranged adjacent to each other in the front-to-back direction. When installing a heavy battery module into the battery housing, no hoisting is required; the battery module is simply pushed into the battery housing in the front-to-back direction. Compared to existing energy storage devices with an upper and lower structure, where the battery module needs to be moved to a certain height before being placed into the lower housing of the energy storage device during production line installation, and where the battery module is heavy, production line workers find it difficult and may even need to use hoisting equipment, requiring the battery module to be lifted to the mounting opening above the housing before it can be installed, resulting in high installation costs and low installation efficiency, the solution of this application can effectively reduce reliance on hoisting equipment and improve assembly efficiency.

[0006] Specifically, the enclosure structure includes a power housing and a battery housing. The power housing and the battery housing are respectively provided with a first mounting port and a second mounting port on opposite sides. That is, the power housing and the battery housing are arranged adjacent to each other in the front-to-back direction. The first mounting port is opened on the contact surface of the power housing, and the second mounting port is opened on the contact surface of the battery housing. After installation, the battery module is installed inside the battery housing, and the power circuit board is installed inside the power housing. The power circuit board and the battery module (heat-sensitive) are arranged in separate compartments. Since the power circuit board generates a large amount of electromagnetic interference during operation, and the battery module is highly sensitive to electromagnetic interference, the mutual interference between the two can be reduced by separating them.

[0007] In the above technical solution, the battery housing also includes: an assembly step, which is provided on the bottom wall of the battery housing, and one end of the assembly step forms a partial second mounting port, through which the battery module enters the battery housing.

[0008] In this solution, an assembly step is added to the bottom wall of the battery casing. Through the stepped guide support design, the pushing path and load-bearing stability of the battery module can be optimized. The assembly step is located at the rear end of the bottom wall of the battery casing, that is, near the second mounting port. One end of the assembly step forms part of the 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. The assembly step serves as the bottom edge area of ​​the second mounting port.

[0009] In the above technical solution, the battery housing further includes: at least one assembly beam disposed on the bottom wall of the battery housing, the assembly beam extending in the front-rear direction, one end of the assembly beam abutting against the assembly step, and the other end of the assembly beam abutting against the front wall of the battery housing.

[0010] One or more assembly beams are added to the bottom wall of the battery casing. Through longitudinal rigid support design, the load-bearing capacity and structural stability of the bottom wall of the casing are enhanced. The front end of the assembly beam is fixed to the inner surface of the front wall of the battery casing, and the rear end abuts against the side wall of the assembly step to form a continuous path, so as to facilitate the smooth pushing of the battery module.

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

[0012] By placing part or all of the battery management protection board within the power housing and positioning it on the side of the power circuit board facing the first mounting port (i.e., near the mating surface of the battery housing), with a small distance between it and the power circuit board, the battery management protection board and the power circuit board are arranged in a concentrated manner. When the two are connected, the wiring harness distance is shorter, reducing interference and shortening unnecessary wiring harnesses.

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

[0014] By setting a bracket plate that can be detachably connected to the power housing inside the power housing, the battery management protection board and the power circuit board are respectively placed on both sides of the bracket plate. On the one hand, the electromagnetic interference between the battery management protection board and the power circuit board can be reduced, ensuring the normal operation of the circuit board. On the other hand, the bracket plate can play a certain role in heat insulation, so that the heat of the power circuit board and the heat of the battery management protection board are separated as much as possible, and the heat transfer to the battery module is also reduced.

[0015] In the above technical solution, the bracket plate is provided with a plurality of first connecting posts, and the first connecting posts are provided with first connecting holes. The battery management protection plate is provided with second connecting holes, and the first connecting member passes through the second connecting hole and is threadedly connected to the first connecting hole.

[0016] The battery management protection board is fixed to the bracket plate by a threaded connection. Specifically, the bracket plate is provided with a first connecting post, and one end of the first connecting post is provided with a first connecting hole with threads. By providing a second connecting hole on the battery management protection board, the battery management protection board can be connected to the bracket plate under the action of the first connecting member, thereby realizing the detachable connection between the battery management protection board and the bracket plate.

[0017] In the above technical solution, the plane of the battery management protection board is parallel to the plane of the first mounting port or the angle between them is less than a preset threshold; the plane of the bracket board is parallel to the plane of the first mounting port or the angle between them is less than a preset threshold; the plane of the power circuit board is parallel to the plane of the first mounting port or the angle between them is less than a preset threshold.

[0018] By defining the planes corresponding to the battery management protection board, bracket board, and power circuit board respectively with the plane corresponding to the first mounting port, the three boards can be stacked in the front-to-back direction, reducing unnecessary space waste, improving space utilization, and making the entire energy storage device smaller and more integrated in the front-to-back direction.

[0019] In the above technical solution, the power circuit board includes: a board body; multiple components disposed on the side of the board body facing the power housing, some of the multiple components are provided with an insulating and heat-conducting structure between them and the inner wall of the power housing, and there is a gap between another part of the multiple components and the inner wall of the power housing.

[0020] The power circuit board includes a board body and multiple components. The components are located on the rear side of the board body, that is, the side facing the power housing away from the first mounting port. By dividing the components on the board body, some components can be attached to the inner wall of the power housing through an insulating and heat-conducting structure. The insulating and heat-conducting structure directly conducts heat to the power housing. Other components are left with a certain gap from 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 post, which is disposed on the power housing, and a third connecting hole is provided in the third connecting post; a fourth connecting hole, which is disposed on the plate; 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 by a threaded connection. Specifically, the power housing is provided with a third connecting post, one end of which is provided with a third connecting hole with threads. By providing a fourth connecting hole on the power circuit board, the power circuit board can be connected to the power housing under the action of the second connecting member, 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, which are disposed on the side wall of the power housing away from the first mounting port; wherein the heat dissipation fins are integrally formed with the power housing.

[0024] By placing the heat dissipation fins on the rear side of the power housing, i.e. the side wall away from the first mounting port, and manufacturing the heat dissipation fins and power housing as a single piece, unnecessary dimensional redundancy in the front-to-back direction of the overall device can be greatly simplified. There is no need to set up heat dissipation fins separately, maximizing space saving and meeting users' needs for product miniaturization.

[0025] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of an energy storage device according to an embodiment of the present invention is shown;

[0027] Figure 2 A schematic diagram of the structure of a battery casing according to an embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram of the structure of an energy storage device according to an embodiment of the present invention is shown;

[0029] Figure 4 An exploded view of an energy storage device according to an embodiment of the present invention is shown.

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

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

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

[0033] Figure 8 A schematic diagram of the assembly structure of the bracket plate and the battery management protection plate according to an embodiment of the present invention is shown;

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

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

[0036] in, Figures 1 to 10 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 100: Energy storage device; 102: Housing structure; 104: Power housing; 1042: First mounting port; 1044: Third connecting post; 1046: Third connecting hole; 106: Battery housing; 1062: Second mounting port; 108: Power circuit board; 1082: Board body; 1083: Fourth connecting hole; 1084: Component; 110: Battery module; 1122: Assembly step; 1124: Assembly beam; 114: Battery management and protection board; 1142: Second connecting hole; 116: Support plate; 1162: First connecting post; 1164: First connecting hole; 118: Heat dissipation fins; 1202: Handle groove; 1204: Handle structure; 122: Connecting terminal;

[0038] 200: Energy storage system; 202: Power supply device. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

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

[0041] The following reference Figures 1 to 10 This invention describes an energy storage device provided according to some embodiments of the present invention.

[0042] like Figure 1 and Figure 4 As shown, this embodiment provides an energy storage device 100, including a housing structure 102 and a power circuit board 108 and a battery module 110 disposed within the housing structure 102. Through a modular design in the front-to-back direction, the power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-to-back direction. When installing the heavy battery module 110 into the battery housing 106, no hoisting is required; the battery module 110 is simply pushed into the battery housing 106 in the front-to-back direction. Compared to existing energy storage devices with an upper and lower structure, where the battery module 110 needs to be moved to a certain height before being placed into the lower housing of the energy storage device during production line installation, and where the battery module 110 is heavy, production line workers will find it difficult and may even need to use hoisting equipment. Installing the battery module 110 requires lifting it to the mounting opening above the housing before it can be installed, resulting in high installation costs and low installation efficiency. The solution of this application can effectively reduce reliance on hoisting equipment and improve assembly efficiency.

[0043] Specifically, the housing 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 mounting port 1042 and a second mounting port 1062 on opposite sides. That is, the power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-to-back direction. The first mounting port 1042 is opened on the contact surface of the power housing 104, and the second mounting port 1062 is opened on the contact surface of the battery housing 106. After installation, the battery module 110 is installed in the battery housing 106, and the power circuit board 108 is installed in the power housing 104. The power circuit board 108 and the battery module 110 (heat sensitive) are arranged in separate compartments. Since the power circuit board 108 will generate a large amount of electromagnetic interference during operation, and the battery module 110 is highly sensitive to electromagnetic interference, the mutual interference between the two can be reduced by separating the compartments.

[0044] It should be added that the power housing 104 and the battery housing 106 are arranged horizontally adjacent to each other in the front-to-back direction, with their contact surfaces flush. The overall structure is a "side-by-side double compartment". When assembling the battery module 110, the battery module 110 can be pushed horizontally into the second mounting port 1062 without any displacement in the direction of gravity, thus completely eliminating the need for lifting.

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

[0046] Furthermore, electromagnetic shielding springs can be installed in the first mounting port 1042 and the second mounting port 1062. Beryllium copper alloy can 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 interlock terminals are provided in the first mounting port 1042 and the second mounting port 1062, which automatically connect the high-voltage circuit when the battery module 110 is inserted and disconnect the high-voltage circuit when it is pulled out.

[0048] In some embodiments, optionally, such as 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 load-bearing stability of the battery module 110 can be optimized. The assembly step 1122 is located at the rear end of the bottom wall of the battery housing 106, that is, near the second mounting port 1062. One end of the assembly step 1122 forms part of the structure of the second mounting port 1062. Specifically, the rear end of the assembly step 1122 can be combined with other structures to form the second mounting port 1062. The assembly step 1122 serves as the bottom edge area of ​​the second mounting port 1062.

[0049] Furthermore, the battery casing 106 can be formed by bending a single sheet metal plate 1082, and the mounting step 1122 can also be formed by bending sheet metal, thereby forming part of the second mounting opening 1062.

[0050] Furthermore, the mounting step 1122 has a sloping transition structure, for example, it can be 10mm, with a slope angle of 15°.

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

[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 mounting 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 housing.

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

[0054] It should be noted that when the battery module 110 is heavy and has a long bottom span, relying solely on the internal sliding rails for support may cause deformation of the module frame due to sagging in the middle. This solution provides additional support points during the initial insertion of the battery module 110 by setting up assembly steps 1122, which share the load with the bottom wall inside the housing, reducing the mid-span bending moment.

[0055] In some embodiments, one or more assembly beams 1124 may be 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 enhanced. 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 so as to facilitate the smooth pushing of the battery module 110.

[0056] Furthermore, the assembly beam 1124 can be made from prefabricated profiles through cutting and processing, thereby reducing processing costs.

[0057] The cross section of the assembly beam 1124 can be 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 insertion of the battery module 110.

[0059] In some embodiments, optionally, such as Figure 3 As shown, a battery management protection board 116 is provided. Part or all of the structure of the battery management protection board 114 is set inside the power housing 104 and is located on the side of the power circuit board 108 facing the first mounting port 1042 (i.e., close to the mating surface of the battery housing 106). The distance between the battery management protection board 114 and the power circuit board 108 is small, so that the battery management protection board 114 and the power circuit board 108 are arranged in a concentrated manner. When the two are connected, the wiring distance is short, and a board-to-board connector can be used. The connection can be achieved by simply plugging and unplugging, reducing interference and shortening unnecessary wiring.

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

[0061] In some embodiments, optionally, a bracket plate 116 detachably connected to the power housing 104 is provided inside the power housing 104, and the battery management protection board 114 and the power circuit board 108 are respectively disposed on both sides of the bracket plate 116. On the one hand, this can reduce electromagnetic interference between the battery management protection board 114 and the power circuit board 108, ensuring the normal operation of the circuit board. On the other hand, the bracket plate 116 can play a certain heat insulation role, so that the heat of the power circuit board 108 and the heat of the battery management protection board 114 are separated as much as possible, and at the same time, the heat transfer to the battery module 110 is reduced.

[0062] In addition, the bracket plate 116 provides a fixation for the battery management protection board 114 to ensure the stable position of the battery management protection board 114 within the power housing 104.

[0063] Furthermore, if the battery management protection board 114 is directly fixed to the power housing 104, housing vibration (especially high-frequency vibration) will be directly transmitted to the battery management protection board 114, causing solder joint fatigue or component desoldering. Using the bracket plate 116 as an intermediate support improves the vibration resistance of the battery management protection board 114.

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

[0065] Furthermore, four to eight first connecting posts 1162 can be provided on the bracket plate 116, distributed in a rectangular array. The first connecting post 1162 is provided with an M3 threaded hole, i.e., a first connecting hole 1164. The corresponding position of the battery management protection board 114 is provided with a threadless second connecting hole 1142. The first connector can be a screw, and the connection between the bracket plate 116 and the battery management protection board 114 can be achieved by tightening the screw.

[0066] The first connecting post 1162 has a 2mm guide cone angle at the top, which automatically corrects the positional deviation when inserted into the second connecting hole 1142. When the screw, which is the first connecting member, is screwed in, the cup head and the end face of the first connecting post 1162 form a surface contact rather than a point contact, to prevent the battery management protection board 114 from tilting.

[0067] The first connecting column 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 protection board 114, the bracket board 116, and the power circuit board 108 are respectively defined with the plane corresponding to the first mounting port 1042, so that the three boards can be stacked in the front-back direction, reducing unnecessary space waste, improving space utilization, and making the entire energy storage device 100 smaller and more integrated in the front-back direction.

[0069] It is understood that the plane of the battery management protection board 114, the bracket board 116 and the power circuit board 108 can be parallel to the plane of the first mounting port 1042, or it can be less than a preset threshold. The preset threshold can be 60°, 70°, 80° and 90°.

[0070] Specifically, for the battery management protection board 114, by limiting the mounting plane to be parallel to the plane of the first mounting port 1042 or the included angle to be less than a preset threshold, the battery management protection board 114 can be made to face the mating surface of the battery housing 106. When the interfaces of the battery management protection board 114 are concentrated on the side close to the first mounting port 1042, it can be convenient to be vertically connected to the battery module 110 cable.

[0071] Regarding the bracket plate 116, the plane on which the bracket plate 116 is located is parallel to or the angle between it and the plane of the first mounting port 1042 is less than a preset threshold. On the one hand, this simplifies the connection between the bracket plate 116 and the power housing 104. On the other hand, it also makes the connection between the battery management protection board 114 and the bracket plate 116 more convenient. The bracket plate 116 can isolate the battery management protection board 114 and the bracket plate 116, ensuring the heat insulation effect and the electromagnetic isolation effect.

[0072] For the power circuit board 108, the plane on which the power circuit board 108 is located is parallel to or the angle between it and the plane of the first mounting port 1042 is less than a preset threshold. Since the power circuit board 108 and the bracket plate 116 are both fixed on the power housing 104, the position of the power circuit board 108 and the bracket plate 116 relative to the power housing 104 is limited to be stacked, which makes it easier for the overall structure to make use of space in the front and rear directions.

[0073] In some embodiments, optionally, such as Figure 3As shown, the power circuit board 108 includes a board body 1082 and multiple components 1084. The components 1084 are disposed on the rear side of the board body 1082, that is, on the side facing the power housing 104 away from the first mounting port 1042. By dividing the components 1084 on the board body 1082, some 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. Other components 1084 have a certain gap with the inner wall, and the gap forms a natural convection channel. Among them, the components 1084 with the insulating and heat-conducting structure are mainly high-heat-generating components or low-voltage components, such as MOSFETs and IGBTs. The components 1084 with gaps with the inner wall are mainly low-heat-generating components, high-voltage components, and high-frequency components, such as capacitors and transformers.

[0074] The insulating and thermally conductive structure includes thermally conductive silicone grease and insulating tape, insulating pads, ceramic substrates, etc., used to support the thermally conductive silicone grease.

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

[0076] Furthermore, the power circuit board 108 may be provided with 6 to 10 third connecting posts 1044, distributed in a rectangular array. The third connecting posts 1044 are provided with M3 threaded holes, namely third connecting holes 1046. The power circuit board 108 is provided with a corresponding unthreaded fourth connecting hole 1083. The second connector may be a screw, and the connection between the power circuit board 108 and the power housing 104 can be achieved by tightening the screw.

[0077] The third connecting post 1044 has a 2mm guide cone angle at its top, which automatically corrects the positional deviation when inserted into the fourth connecting hole 1083.

[0078] The third connecting post 1044 and the power housing 104 can be integrally formed.

[0079] In some embodiments, optionally, such as Figure 4As shown, the heat dissipation fins 118 are set on the rear side of the power housing 104, that is, on the side wall away from the first mounting port 1042. The heat dissipation fins 118 and the power housing 104 are integrally formed and manufactured, which can greatly simplify the unnecessary dimensional redundancy of the overall device in the front-back direction. There is no need to set the heat dissipation fins 118 separately, which maximizes the space saving and meets the user's demand for product miniaturization.

[0080] In some embodiments, optionally, such as Figure 2 As shown, the box structure 102 is also provided with: a handle groove 1202, which is provided on two opposite walls in the second direction; and a handle structure 1204, which is provided in the handle groove 1202.

[0081] In some embodiments, optionally, such as Figure 3 As shown, a plurality of connection terminals 122 are also provided on the left and right walls of the power housing 104.

[0082] This application also provides an embodiment of an energy storage system 200, wherein at least one power supply device 202 is provided at the bottom of the energy storage device 100, specifically as follows: Figure 9 As shown, a power supply device 202 is provided at the bottom of the energy storage device 100 to enhance the energy storage capacity of the energy storage system 200, or as... Figure 10 As shown, two power supply devices 202 are installed at the bottom of the energy storage device 100 to further enhance the energy storage capacity.

[0083] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0084] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy storage device, characterized by, include: The enclosure structure includes a power housing and a battery housing arranged adjacent to each other in the front-to-back direction. The power housing has a first mounting port on the side facing the battery housing, and the battery housing has a second mounting port on the side facing the power housing. The battery housing and the power housing are detachably connected through the first mounting port and the second mounting port. A power circuit board is disposed inside the power housing, and the power circuit board is connected to the power housing. A battery module is disposed inside the battery housing, and the battery module is electrically connected to the power circuit board.

2. The energy storage device of claim 1, wherein, The battery casing also includes: An assembly step is provided on the bottom wall of the battery housing, and one end of the assembly step forms a partial second mounting port, through which the battery module enters the battery housing.

3. The energy storage device of claim 2, wherein, The battery casing also includes: At least one mounting beam is disposed on the bottom wall of the battery housing, the mounting beam extends along the front-rear direction, one end of the mounting beam abuts against the mounting step, and the other end of the mounting beam abuts against the front wall of the battery housing.

4. The energy storage device of claim 1, wherein, The energy storage device also includes: A battery management protection board, at least a portion of which is disposed within the power housing, and which is disposed on the side of the power circuit board facing the first mounting port; The battery management protection board is electrically connected to the battery module.

5. The energy storage device according to claim 4, characterized in that, The energy storage device also includes: A bracket plate is disposed between the battery management protection board and the power circuit board. The bracket plate is detachably connected to the power housing, and the battery management protection board is connected to the bracket plate.

6. The energy storage device of claim 5, wherein, The bracket plate is provided with a plurality of first connecting posts, each of which has a first connecting hole. The battery management protection plate is provided with a second connecting hole, and a first connector passes through the second connecting hole and is threadedly connected to the first connecting hole.

7. The energy storage device according to claim 5, characterized in that, The plane where the battery management protection board is located is parallel to the plane where the first mounting port is located or the included angle is less than a preset threshold. The plane of the bracket plate is parallel to the plane of the first mounting port or the included angle is less than a preset threshold. The plane of the power circuit board is parallel to or has an angle less than a preset threshold with the plane of the first mounting port.

8. The energy storage device of any one of claims 1-7, wherein, The power circuit board includes: plate body; Multiple components are disposed on the side of the plate facing the power housing. Some of the multiple components are provided with an insulating and heat-conducting structure between them and the inner wall of the power housing, while other components have a gap between them and the inner wall of the power housing.

9. The energy storage device of claim 8, wherein, The energy storage device also includes: A third connecting post is provided on the power housing, and a third connecting hole is provided in the third connecting post; A fourth connecting hole is provided on the plate. The second connector passes through the fourth connecting hole and is threadedly connected to the third connecting hole.

10. The energy storage device of any one of claims 1-6, wherein, The energy storage device also includes: Heat dissipation fins are provided on the side wall of the power housing away from the first mounting port; The heat dissipation fins are integrally formed with the power housing.

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