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, the power shell and the battery shell are detachably connected, one side of the power shell far away from the battery shell is provided with a plurality of radiating fins which are arranged at intervals, and the radiating fins are detachably connected with the power shell. The power shell and the radiating fins are integrally formed; the power circuit board is arranged in the power shell, a plurality of heating components are arranged on one surface of the power circuit board, and the power circuit board is detachably 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 of the utility model, the radiating fins are integrated on the power shell, so that the radiating effect and the size miniaturization requirement of the whole structure in the front-back direction can be considered.

Description

Energy storage devices 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. In related technologies, home energy storage devices require independent spaces for the batteries, inverters, and radiators, resulting in a larger size and greater space requirements when placed in a home. Summary of the Invention

[0003] In order to solve or improve the technical problem of large size of the above-mentioned energy storage devices, 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 the front-to-back direction, the power housing and the battery housing being detachably connected, the power housing having a plurality of spaced heat dissipation fins on the side away from the battery housing, the power housing and the heat dissipation fins being integrally formed; a power circuit board disposed within the power housing, one side of the power circuit board having a plurality of heat-generating components, the power circuit board being detachably connected to the power housing; and a battery module disposed within the battery housing, the battery module being 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. The housing structure includes a power housing and a battery housing. The battery module is disposed within the battery housing. Heat dissipation fins are integrated on the power housing, which can effectively reduce the space required for separately disposed heat dissipation fins. It can be understood that in this solution, the heat dissipation fins are disposed on the side of the power housing away from the battery housing. The power housing and the battery housing are arranged adjacent to each other in the front-back direction, thereby effectively reducing the overall size of the energy storage device in the front-back direction.

[0006] In the above technical solution, the heat dissipation fins extend along the direction of gravity.

[0007] By restricting the extension direction of the heat dissipation fins to the direction of gravity, on the one hand, when the heat dissipation fins receive heat from the power circuit board, they will heat the air near the heat dissipation fins. Under the influence of their own density, the hot air will naturally move upward through the convection channel formed by the vertical heat dissipation fins, achieving a good heat dissipation effect without the need for additional fans or other equipment. On the other hand, when the energy storage device is used in outdoor scenarios, when water drips on the outside of the power casing, the vertical heat dissipation fins can act as a water channel to drain the water in time and prevent water accumulation.

[0008] In the above technical solution, the power housing also includes: a heat dissipation groove, which is disposed on the outer wall surface of the rear wall of the power housing, and one end of the heat dissipation fins in the front-rear direction is connected to the bottom of the heat dissipation groove, and the extension dimension of the heat dissipation fins in the front-rear direction is not greater than the groove depth of the heat dissipation groove.

[0009] A heat dissipation groove is provided on the outer wall of the rear side wall, which is a nested design of heat dissipation groove and heat dissipation fins. The heat dissipation groove is located on the outer wall of the rear side wall of the power housing and extends along the direction of gravity. The heat dissipation fins are integrally formed with the bottom of the heat dissipation groove at one end in the front-back direction. The extension dimension in the front-back direction is not greater than the groove depth of the heat dissipation groove.

[0010] In the above technical solution, the power housing further includes a terminal interface disposed on the power housing, and the terminal interface is disposed on at least one side of the heat dissipation fins.

[0011] By setting terminal interfaces on the power housing and limiting the position of the terminal interfaces to one or more sides of the heat dissipation fins, different types of wiring terminals can be connected to meet the wiring requirements of the energy storage device.

[0012] In the above technical solution, the power housing includes: a mounting groove, located on the inner wall surface of the rear wall of the power housing; and wiring grooves, located on both sides of the mounting groove, extending along the direction of gravity; wherein the wiring grooves are arranged opposite to the terminal interfaces.

[0013] The power housing is equipped with mounting slots and wiring slots. The composite design of the mounting slots nested within the wiring slots further optimizes the space utilization, heat dissipation efficiency, and assembly precision of the power housing. The mounting slots are located on the inner wall of the rear side wall of the power housing and can be die-cast integrally with the housing. The wiring slots are located on both sides of the mounting slots, making full use of the internal space of the power housing and resulting in smaller dimensions in the front-to-back direction.

[0014] In the above technical solution, the power housing has a first mounting port on the side facing the battery housing, and the connecting plate 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. The angle between the plane of the power circuit board and the plane of the first mounting port is less than a preset angle.

[0015] A first mounting port and a second mounting port are respectively provided on the power housing and the battery housing. Through the precise docking design of the first and second mounting ports, combined with the parallel or near-parallel layout of the plate and the mounting port plane, efficient assembly is achieved. The housing 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 their 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 in the battery housing, and the power circuit board is installed in 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.

[0016] In the above technical solution, the power housing also includes: multiple connecting posts located on the inner wall surface of the rear wall of the power housing, and the power circuit board having connecting holes adapted to the connecting posts; wherein, the connecting piece passes through the connecting hole and cooperates with the connecting post to achieve a detachable connection between the power circuit board and the power housing.

[0017] The power circuit board is detachably connected to the power housing. Specifically, it can be fixed to the power housing by means of threaded engagement. In particular, the power housing is provided with a connecting post, one end of which is provided with a threaded hole. By providing a connecting hole on the power circuit board, the power circuit board can be connected to the power housing under the action of the connector, thereby realizing the detachable connection between the power circuit board and the power housing.

[0018] In the above technical solution, some of the multiple heating elements are provided with an insulating and heat-conducting structure between them and the inner wall surface of the rear wall of the power housing, and there is a gap between another part of the multiple heating elements and the inner wall surface of the rear wall of the power housing.

[0019] In the above technical solution, the energy storage device further includes: a battery management protection board, which is located inside the power housing and on the other side of the power circuit board away from the heat-generating components; a support plate, which is located between the battery management protection board and the power circuit board, and the support plate is detachably connected to the power housing and the battery management protection board is detachably connected to the support plate; wherein, the battery management protection board is electrically connected to the battery module.

[0020] By incorporating a battery management protection board, some or all of its structure is housed within the power housing and positioned on the side of the power circuit board facing the first mounting port (i.e., the mating surface near the battery housing). The small distance between the battery management protection board and the power circuit board allows for a concentrated arrangement of the two structures. When connecting them, the wiring harness distance is short, enabling the use of board-to-board connectors. Connection can be achieved simply by plugging and unplugging, reducing interference and shortening unnecessary wiring harnesses.

[0021] In the above technical solution, the energy storage device further includes: a pressure plate structure, which is located inside the battery casing. The pressure plate structure is located on the side of the battery module facing the power casing, and the pressure plate structure is used to fix and press the battery module; wherein, the battery management protection board is located between the pressure plate structure and the support plate. Attached Figure Description

[0022] Figure 1 shows a schematic diagram of the structure of an energy storage device according to an embodiment of the present invention;

[0023] Figure 2 shows a schematic diagram of the power housing according to an embodiment of the present invention;

[0024] Figure 3 shows a schematic diagram of the power housing according to an embodiment of the present invention;

[0025] Figure 4 shows a schematic diagram of the power housing according to an embodiment of the present invention;

[0026] Figure 5 shows a schematic diagram of the structure of a power circuit board according to an embodiment of the present invention;

[0027] Figure 6 shows an exploded structural diagram of an energy storage device according to an embodiment of the present invention;

[0028] Figure 7 shows a schematic diagram of the power housing according to an embodiment of the present invention;

[0029] Figure 8 shows an exploded structural diagram of an energy storage device according to an embodiment of the present invention;

[0030] Figure 9 shows a schematic diagram of an energy storage system according to an embodiment of the present invention;

[0031] Figure 10 shows a schematic diagram of an energy storage system according to an embodiment of the present invention;

[0032] Figure 11 shows a schematic diagram of the structure of a battery casing according to an embodiment of the present invention.

[0033] The correspondence between the reference numerals and component names in Figures 1 to 11 is as follows:

[0034] 100: Energy storage device; 102: Housing structure; 104: Power housing; 1042: First mounting port; 106: Battery housing; 1062: Second mounting port; 108: Power circuit board; 1082: Board body; 1084: Heating component; 110: Battery module; 114: Battery management and protection board; 116: Support plate; 118: Heat sink fins; 1262: Mounting slot; 1264: Wiring slot; 128: Heat sink; 130: Terminal interface; 1322: Connecting post; 1324: Connecting hole; 134: Pressure plate structure; 1362: Photovoltaic positive terminal; 1364: Photovoltaic negative terminal; 1366: Antenna; 1368: Vent valve; 1370: Grounding terminal; 138: Insulating and heat-conducting structure;

[0035] 200: Energy storage system; 202: Power supply device. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] The energy storage device provided according to some embodiments of the present invention is described below with reference to Figures 1 to 11.

[0039] In view of this, as shown in Figures 1 and 8, this application 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. The housing structure 102 includes a power housing 104 and a battery housing 106. The battery module 110 is disposed within the battery housing 106. Heat dissipation fins 118 are integrated on the power housing 104, which can effectively reduce the space required for separately disposed heat dissipation fins 118. It can be understood that in this solution, the heat dissipation fins 118 are disposed on the side of the power housing 104 away from the battery housing 106. The power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-back direction, thereby effectively reducing the overall size of the energy storage device 100 in the front-back direction.

[0040] Specifically, the power housing 104 and the battery housing 106 are arranged side by side in the front-to-back direction, avoiding vertical stacking. On this basis, by providing an integrally die-cast heat dissipation fin 118 on the outer surface of the rear side wall of the power housing 104, the heat dissipation structure is integrated into the rear side of the housing, which significantly reduces the overall size of the energy storage device 100 in the front-to-back direction. It can be understood that the rear wall of the power housing 104 is connected to the battery housing 106 to protect the internal structure, and also has a heat dissipation function.

[0041] Furthermore, the heat dissipation fins 118 and the power housing 104 are integrally formed by high-pressure die casting process, and guide grooves can be provided between adjacent heat dissipation fins 118, with the guide grooves arranged along the direction of gravity.

[0042] For outdoor applications, a hydrophobic coating can be sprayed onto the surface of the heat dissipation fins 118.

[0043] In some embodiments, the extension direction of the heat dissipation fins 118 is optionally the direction of gravity. On the one hand, when the heat dissipation fins 118 receive heat from the power circuit board 108, they will heat the air near the heat dissipation fins 118. Under the action of its own density, the hot air will naturally move upward through the convection channel formed by the vertical heat dissipation fins 118, and a better heat dissipation effect can be achieved without additional equipment such as fans. On the other hand, when the energy storage device 100 is used in outdoor scenarios, when water droplets fall on the outside of the power housing 104, the vertical heat dissipation fins 118 can serve as a water channel to drain the water in time and avoid water accumulation.

[0044] In some embodiments, as shown in Figures 2 and 7, a heat dissipation groove 128 is provided on the outer wall surface of the rear sidewall, and the heat dissipation groove 128 and the heat dissipation fins 118 are nested together. The heat dissipation groove 128 is provided on the outer wall surface of the rear sidewall of the power housing 104 and extends along the direction of gravity. One end of the heat dissipation fins 118 in the front-rear direction is integrally formed with the bottom of the groove of the heat dissipation groove 128, and the extension dimension in the front-rear direction is not greater than the groove depth of the heat dissipation groove 128.

[0045] Furthermore, the first clearance groove is formed in the reinforcing rib area between the heat dissipation grooves 128, and its depth matches that of the heat dissipation grooves 128 to avoid weakening the overall strength of the casing.

[0046] It is understandable that the heat dissipation fins 118 are embedded in the heat dissipation groove 128, and the heat is conducted through the side wall of the groove, which can significantly increase the effective heat dissipation area.

[0047] In this way, by limiting the extension dimension of the heat dissipation fins 118 to no greater than the depth of the heat dissipation groove 128, the fins are completely embedded in the groove, and the overall front-to-back dimension of the machine only increases the groove depth.

[0048] In some embodiments, optionally as shown in FIG3, a terminal interface 130 is provided on the power housing 104, and the position of the terminal interface 130 is limited to one or more sides of the heat dissipation fins 118. Under the action of the terminal interface 130, different types of wiring terminals can be connected to meet the wiring requirements of the energy storage device 100.

[0049] Specifically, the terminals provided at the terminal interface 130 include, but are not limited to, high-voltage cables and low-voltage signal lines.

[0050] Furthermore, the high-voltage cable includes positive and negative terminals for connecting the photovoltaic system, namely, photovoltaic positive terminal 1362 and photovoltaic negative terminal 1364 as shown in Figure 6, and low-voltage signal line as shown in Figure 1, including antenna 1366 for communication, grounding terminal 1370, etc. In addition, a vent valve 1368 is provided on the terminal interface 130, which is located on the same side of the power housing as antenna 1366 and grounding terminal 1370.

[0051] In some embodiments, the terminals of the terminal interface 130 may further include a grid-connected port, an AC output port, a DC output port, a parallel communication input port, an Ethernet wired port, and a USB port / Wifi communication port.

[0052] Furthermore, the high-voltage cable is located on one side of the heat sink fin 118, and the low-voltage cable is located on the other side of the heat sink fin 118, thereby minimizing mutual interference.

[0053] Furthermore, the terminal interface 130 is configured with a stepped layered structure, with high-voltage cables arranged on the upper step and low-voltage signal lines located on the lower step. The distance between the upper and lower steps in the height direction is ≥10mm to reduce electromagnetic interference.

[0054] In some embodiments, as shown in FIG4, a mounting groove 1262 and a wiring groove 1264 are optionally provided in the power housing 104. The composite design of the mounting groove 1262 nested with the wiring groove 1264 further optimizes the space utilization, heat dissipation efficiency and assembly accuracy of the power housing 104. The mounting groove 1262 is located on the inner wall surface of the rear side wall of the power housing 104 and can be integrally die-cast with the housing. The wiring groove 1264 is located on both sides of the mounting groove 1262, making full use of the internal space of the power housing 104 and reducing the size in the front-rear direction.

[0055] Furthermore, the power circuit board 108 is fixed to the positioning reference surface of the mounting slot 1262 by four countersunk screws.

[0056] On both sides of the mounting groove 1262, specifically on the left and right sides, wiring grooves 1264 are added opposite to the terminal interface 130 and extend along the direction of gravity. The specific extension dimension can be the same as the mounting groove 1262 or slightly longer than the dimension of the mounting groove 1262 in the direction of gravity, so as to facilitate wiring in the wiring groove 1264.

[0057] The terminal interface 130 is located on the left and right sides of the groove wall of the wiring groove 1264.

[0058] Furthermore, a stepped layered structure can be set inside the wiring groove 1264 to accommodate the layered fixing of cables of different diameters.

[0059] Furthermore, the wall of the wiring trough 1264 has pre-set mounting holes for securing nylon cable ties or metal clamps.

[0060] The wiring groove 1264 and the power housing 104 are integrally die-cast.

[0061] Furthermore, the edge of the wiring trough 1264 is provided with a rounded corner guide structure to prevent the cable from being bent and damaged.

[0062] Furthermore, high-voltage cables are placed on the upper step, while low-voltage signal lines are located on the lower step, with a spacing of ≥10mm to reduce electromagnetic interference.

[0063] Alternatively, the high-voltage cable can be placed in the wiring slot 1264 on one side of the mounting slot 1262, and the low-voltage signal cable can be placed in the wiring slot 1264 on the other side of the mounting slot 1262, so as to minimize mutual interference.

[0064] The high-voltage cables include positive and negative terminals for connecting the photovoltaic system, while the low-voltage signal lines include antennas and grounding wires for communication.

[0065] In some embodiments, optionally as shown in Figures 4, 8, and 11, a first mounting port 1042 and a second mounting port 1062 are respectively provided on the power housing 104 and the battery housing 106. Through the precise alignment design of the first mounting port 1042 and the second mounting port 1062, combined with the parallel or approximately parallel layout of the plate 1082 and the mounting port plane, efficient assembly is achieved. 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, i.e., the power housing... The power housing 104 and the battery housing 106 are arranged adjacent to each other in the front-to-back direction. A first mounting port 1042 is opened on the contact surface of the power housing 104, and a second mounting port 1062 is opened on the contact surface of the battery housing 106. After installation, the battery module 110 is installed inside the battery housing 106, and the power circuit board 108 is installed inside 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.

[0066] By restricting the plane of the plate 1082 to be parallel or approximately parallel to the plane of the first mounting port 1042, the overall structure has a smaller size in the front-to-back direction when the plate 1082 is assembled onto the power housing 104. The plate 1082 is parallel to the mounting port plane (i.e., perpendicular to the heat dissipation fins 118), and the heat from the heat-generating component 1084 is directly conducted to the root of the fins.

[0067] The heat dissipation airflow is perpendicular to the 1082 plane of the board, resulting in lower airflow resistance and improved convection heat dissipation efficiency.

[0068] In some embodiments, the power circuit board 108 is optionally detachably connected to the power housing 104. Specifically, it can be fixed to the power housing 104 by means of threaded engagement. As shown in FIG3, a connecting post 1322 is provided on the power housing 104, and one end of the connecting post 1322 is provided with a threaded hole. As shown in FIG5, by providing a connecting hole 1324 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 connector, thereby realizing the detachable connection between the power circuit board 108 and the power housing 104.

[0069] Furthermore, 6 to 10 connecting posts 1322 can be provided on the power circuit board 108, distributed in a rectangular array. The connecting posts 1322 are provided with M3 threaded holes, and the corresponding positions of the power circuit board 108 are provided with threadless connecting holes 1324. The connecting parts can be screws, and the connection between the power circuit board 108 and the power housing 104 can be achieved by tightening the screws.

[0070] The top of the connecting post 1322 is provided with a 2mm guide cone angle, which automatically corrects the positional deviation when inserted into the connecting hole.

[0071] The connecting column 1322 and the power housing 104 can be integrally machined.

[0072] In some embodiments, optionally, an insulating thermally conductive contact area and a gap isolation area are designed differently on the inner wall surface of the rear side wall of the power housing 104 to achieve directional and efficient heat dissipation. An insulating thermally conductive structure 138, such as a gasket or elastic thermal insulation foam, is filled between the inner wall surface of the rear wall and the heat-generating component 1084.

[0073] Among them, high-heat-generating components such as Insulated-Gate Bipolar Transistors (IGBTs) and Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) are in direct contact with the inner wall surface of the rear wall through an insulating thermally conductive structure. Low-heat-generating components such as resistors and signal capacitors can maintain a gap with the inner wall surface of the rear wall and rely on natural convection for heat dissipation, avoiding excessive heat conduction that could lead to localized overheating of the casing.

[0074] The gap area is filled with silicone rubber foam, which expands and deforms by absorbing heat from the components.

[0075] Among them, high-heat-generating components can be positioned directly opposite the center of the heat-conducting protrusion for directional heat conduction.

[0076] In some embodiments, optionally, as shown in FIG6, the energy storage device 100 is further provided with a battery management protection board 114. Part or all of the structure of the battery management protection board 114 is disposed in the power housing 104 and disposed 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.

[0077] 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.

[0078] Furthermore, a bracket plate 116 is provided inside the power housing 104 and is detachably connected to the power housing 104. The battery management protection board 114 and the power circuit board 108 are respectively placed on both sides of the bracket plate 116. On the one hand, it can reduce electromagnetic interference between the battery management protection board 114 and the power circuit board 108 and ensure 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, it reduces the heat transfer to the battery module 110.

[0079] 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.

[0080] 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.

[0081] In some embodiments, optionally as shown in FIG6, a pressure plate structure 134 is provided in the battery housing 106 and is located on the rear side of the battery module 110. During assembly, the battery module 110 can be pressed and compacted to achieve fixation and prevent the battery module 110 from shaking. In addition, under the action of the pressure plate structure 134, the heat of the power circuit board 108 and the battery protection board is prevented from being conducted to the battery module 110. Overheating of the battery module 110 will reduce the charging and discharging efficiency, that is, the pressure plate structure 134 plays a certain heat insulation role.

[0082] In addition, this application also provides an embodiment of an energy storage system 200, in which at least one power supply device 202 is provided at the bottom of the energy storage device 100. Specifically, as shown in FIG9, one 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 shown in FIG10, two power supply devices 202 are provided 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 in that, 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 and the battery housing are detachably connected. The power housing has multiple spaced heat dissipation fins on the side away from the battery housing. The power housing and the heat dissipation fins are integrally formed. A power circuit board is disposed inside the power housing. One side of the power circuit board has multiple heat-generating components. The power circuit board is detachably connected to the power housing. A battery module is disposed inside the battery housing. The battery module is electrically connected to the power circuit board.

2. The energy storage device according to claim 1, characterized in that, The heat dissipation fins extend along the direction of gravity.

3. The energy storage device according to claim 1, characterized in that, The power housing further includes a heat dissipation groove disposed on the outer wall surface of the rear wall of the power housing, wherein one end of the heat dissipation fins in the front-rear direction is connected to the bottom of the heat dissipation groove, and the extension dimension of the heat dissipation fins in the front-rear direction is not greater than the groove depth of the heat dissipation groove.

4. The energy storage device according to claim 3, characterized in that, The power housing further includes a terminal interface disposed on the power housing, and the terminal interface is disposed on at least one side of the heat dissipation fins.

5. The energy storage device according to claim 4, characterized in that, The power housing includes: a mounting groove disposed on the inner wall surface of the rear wall of the power housing; and wiring grooves disposed on both sides of the mounting groove, the wiring grooves extending along the direction of gravity; wherein the wiring grooves are disposed opposite to the terminal interface.

6. The energy storage device according to claim 4, characterized in that, 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. The angle between the plane of the power circuit board and the plane of the first mounting port is less than a preset angle.

7. The energy storage device according to any one of claims 1 to 6, characterized in that, The power housing further includes: a plurality of connecting posts disposed on the inner wall surface of the rear wall of the power housing; the power circuit board is provided with connecting holes adapted to the connecting posts; wherein, a connector passes through the connecting holes and cooperates with the connecting posts to achieve a detachable connection between the power circuit board and the power housing.

8. The energy storage device according to claim 7, characterized in that, Some of the multiple heating elements have an insulating and heat-conducting structure between them and the inner wall of the rear wall of the power housing, while another portion of the multiple heating elements have a gap between them and the inner wall of the rear wall of the power housing.

9. The energy storage device according to any one of claims 1 to 6, characterized in that, Also includes: A battery management protection board is disposed inside the power housing, and the battery management protection board is disposed on the other side of the power circuit board away from the heat-generating components; 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 detachably connected to the bracket plate. The battery management protection board is electrically connected to the battery module.

10. The energy storage device according to claim 9, characterized in that, The energy storage device further includes: a pressure plate structure disposed inside the battery housing, the pressure plate structure being disposed on the side of the battery module facing the power housing, the pressure plate structure being used to fix and press the battery module; wherein, the battery management protection board is disposed between the pressure plate structure and the support plate.

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