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, the power shell and the battery shell are detachably connected, the side, away from the battery shell, of the power shell is a rear side wall, the outer wall face of the rear side wall is provided with a plurality of heat dissipation fins arranged at intervals, and the heat dissipation fins are arranged on the outer wall face of the rear side wall; the power shell and the radiating fins are integrally formed; the power circuit board is arranged in the power shell, and the power circuit board comprises a plurality of heating components; the plurality of first avoiding grooves are formed in the inner wall surface of the rear side wall of the power shell, and the plurality of first avoiding grooves are respectively arranged corresponding to the plurality of heating components; 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, the local space is reconstructed under the action of the first receding groove, and the size of the overall structure in the front-back direction can be further reduced on the basis that the heat dissipation effect is guaranteed.

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 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. A 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 electric energy, and the energy storage system generally uses energy storage devices such as storage batteries or lithium batteries to store the excess electric energy for emergencies. In related technologies, due to the need for structures such as batteries, inverter boards, and radiators in household energy storage devices, the functions of each structure are independent of each other and all require independent spaces for placement, resulting in a relatively large volume. When placing it at home, the occupied space is relatively large. Summary of the Invention

[0003] In order to solve or improve the technical problem of the relatively large volume 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, the power housing and the battery housing are detachably connected, the side of the power housing away from the battery housing is a rear side wall, and a plurality of spaced-apart heat dissipation fins are provided on the outer wall surface of the rear side wall, and the power housing and the heat dissipation fins are integrally formed; a power circuit board, arranged in the power housing, the power circuit board includes a main board body and a plurality of heat generating components arranged on the main board body, the main board body is detachably connected to the power housing, and the heat generating components are arranged on the side of the main board body away from the battery housing; a plurality of first avoidance grooves, arranged on the inner wall surface of the rear side wall of the power housing, and the plurality of first avoidance grooves are respectively arranged corresponding to the plurality of heat generating components; a battery module, arranged in the battery housing, and the battery module is electrically connected to the power circuit board.

[0005] The energy storage device provided by the present invention includes a box structure and a power circuit board and a battery module arranged in the box structure, wherein the box structure includes a power housing and a battery housing, the battery module is arranged in the battery housing, and heat dissipation fins are integrated on the power housing, which can effectively reduce the space for separately setting heat dissipation fins. It can be understood that in this solution, the heat dissipation fins are arranged on the side of the power housing away from the battery housing, and the power housing and the battery housing are arranged adjacent to each other in the front-to-back direction, thereby effectively reducing the overall size of the energy storage device in the front-to-back direction. It should be emphasized that on this basis, this solution makes structural avoidance for the shape of the power housing for the heat-generating components with large heat generation on the power circuit board, that is, under the action of one or more first avoidance grooves, the local space is reconstructed, and the heat generated by the heat-generating components can be conducted to the outside through the heat dissipation fins in the corresponding area of ​​the first avoidance groove, so that on the basis of ensuring the heat dissipation effect, the size of the overall structure in the front-to-back direction can be further reduced.

[0006] In the above technical solution, the power circuit board further includes: at least one expansion board, the at least one expansion board is electrically connected to the main board body, and the at least one expansion board is arranged on the rear side of the main board body.

[0007] By setting up additional expansion boards, different functions can be set up according to needs. Since the expansion boards are set on the rear side of the main board body, the size of the heat-generating components protruding from the main board body is utilized. On the one hand, the possibility of integrating the components of each expansion board into the main board body so as to make the area of ​​the main board body too large is reduced. On the other hand, the volume increase caused by setting up additional boards separately is minimized as much as possible, the size of the power circuit board in the front-to-back direction is reduced, and the redundant space between the rear side wall of the power housing and the main board body is utilized to improve space utilization.

[0008] In the above technical solution, the power housing further includes: at least one second avoidance groove, which is arranged on the inner wall surface of the rear side wall of the power housing, and the at least one second avoidance groove is respectively arranged corresponding to the at least one expansion plate.

[0009] One or more second avoidance grooves are arranged on the inner wall surface of the rear side wall of the power housing, which can correspond one-to-one with the projection area corresponding to the expansion board, so as to avoid the expansion board and make full use of the protruding size of the heat-generating components. Without additionally extending the size of the power housing in the front and rear directions, the functions of multiple expansion boards are taken into account.

[0010] In the above technical solution, the dimension of the heat dissipation fin in the front-to-back direction is greater than the depth of any first avoidance groove.

[0011] By limiting the size relationship between the heat dissipation fins and the first avoidance grooves, that is, the size of the heat dissipation fins in the front-to-back direction is greater than the groove depth of any first avoidance groove, the maximization of heat dissipation efficiency and the compactness of the structure can be taken into account.

[0012] In the above technical solution, the power housing further includes: a mounting groove provided on the inner wall surface of the rear side wall of the power housing; wherein, a first avoidance groove is provided at the bottom of the mounting groove, and the first avoidance groove is recessed backward in the front-rear direction.

[0013] Through the composite design of nesting the first avoidance groove in the mounting groove, the space utilization rate, heat dissipation efficiency and assembly accuracy of the power housing are further optimized. Among them, the mounting groove is provided on the inner wall surface of the rear side wall of the power housing, and the mounting groove can be integrally die-cast with the housing. The first avoidance groove is located at the bottom of the mounting groove and is recessed backward in the front-rear direction, so that the mounting groove nests the first avoidance groove, and the size of the power housing in the front-rear direction is smaller.

[0014] In the above technical solution, the power housing further includes: wiring grooves provided on both sides of the mounting groove, and the wiring grooves extend in the direction of gravity.

[0015] On both sides of the mounting groove of the power housing, specifically on the left and right sides, wiring grooves are added and extend in the direction of gravity. The specific extension dimension can be the same as that of the mounting groove or slightly longer than the dimension of the mounting groove in the direction of gravity to facilitate wiring in the wiring grooves.

[0016] In the above technical solution, the power housing further includes: heat-conducting protrusions provided on the inner wall surface of the rear side wall, and the heat-conducting protrusions are arranged opposite to the heat-generating components; wherein, an insulating heat-conducting structure is provided between at least part of the heat-generating components and the heat-conducting protrusions, and there is a gap between at least part of the heat-generating components and the heat-conducting protrusions.

[0017] By providing heat-conducting protrusions on the inner wall surface of the rear side wall of the power housing and differentiating the design of the insulating heat-conducting contact area and the gap isolation area, directional and efficient heat dissipation is achieved.

[0018] In the above technical solution, a first mounting opening is provided on one side of the power housing facing the battery housing, a second mounting opening is provided on one side of the battery housing facing the power housing, and the battery housing and the power housing are detachably connected through the first mounting opening and the second mounting opening; wherein, the plane where the main board body is located is parallel to the plane where the first mounting opening is located or the included angle therebetween is less than a preset angle.

[0019] Through the precise docking design of the first installation port and the second installation port, combined with the parallel or approximately parallel layout of the main board body and the plane of the installation port, efficient assembly is achieved. The box structure includes a power housing and a battery housing. The power housing and the battery housing are respectively provided with a first installation port and a second installation port on the opposite sides. That is, the power housing and the battery housing are arranged adjacent to each other in the front-rear direction. The first installation port is opened on the contact surface of the power housing, and the second installation port is opened on the contact surface of the battery housing. After installation, a battery module is arranged in the battery housing, and a power circuit board is arranged in the power housing. Through the (heat-sensitive) compartment layout of the power circuit board and the battery module, since the power circuit board will generate relatively large electromagnetic interference during operation, and the battery module is highly sensitive to electromagnetic interference, through compartmentalization, the mutual interference between the two can be reduced.

[0020] In the above technical solution, the power housing further includes: a heat dissipation groove, provided on the outer wall surface of the rear side wall. One end of the heat dissipation fin in the front-rear direction is connected to the bottom of the heat dissipation groove, and the extension dimension of the heat dissipation fin in the front-rear direction is not greater than the depth of the heat dissipation groove; wherein, the depth of any first avoidance groove is not greater than the depth of the heat dissipation groove.

[0021] By providing a heat dissipation groove on the outer wall surface of the rear side wall and adopting the nested design of the heat dissipation groove and the heat dissipation fin, the heat dissipation groove is provided on the outer wall surface of the rear side wall of the power housing and extends along the gravity direction. One end of the heat dissipation fin in the front-rear direction is integrally formed with the bottom of the heat dissipation groove, and the extension dimension in the front-rear direction is not greater than the depth of the heat dissipation groove.

[0022] In the above technical solution, the energy storage device further includes: a connecting column, provided on the inner wall surface of the rear side wall. A first connection hole is provided inside the connecting column; a second connection hole is provided on the main board body; wherein, a connecting piece passes through the second connection hole and is threadedly connected to the first connection hole.

[0023] The power circuit board is fixed to the power housing through threaded cooperation. Specifically, a connecting column is provided on the power housing, and a first connection hole with threads is provided at one end of the connecting column. By providing a second connection hole on the main board body of the power circuit board, under the action of the connecting piece, 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.

[0024] In the above technical solution, the energy storage device further includes: a positioning column, provided on the inner wall surface of the rear side wall along the front-rear direction. The positioning column includes a column body and a positioning protrusion provided at one end of the column body; a positioning hole is provided on the main board body, and the shape of the positioning hole is adapted to the shape of the positioning protrusion; wherein, the main board body abuts against one end of the column body through the cooperation of the positioning hole and the positioning protrusion.

[0025] Since multiple heat-generating components are arranged on one side of the main board body of the power circuit board facing the rear side wall, and multiple first avoidance grooves with matching shapes are arranged on the rear side wall of the power housing, when the main board body is assembled onto the power housing, the protruding heat-generating components may collide with the first avoidance grooves, resulting in detachment or failure. Therefore, through the precise cooperation design of the positioning posts and positioning holes, the pre-positioning of the main board body is achieved.

[0026] In the above technical solution, the heat-generating components include capacitor components and inductor components. The shapes of some of the multiple first avoidance grooves are adapted to the shapes of the capacitor components, and the shapes of some of the multiple first avoidance grooves are adapted to the shapes of the inductor components.

[0027] The heat-generating components are classified into capacitor components and inductor components according to their categories. For the multiple first avoidance grooves, the shapes and positions of the first avoidance grooves are set according to the specific types and corresponding positions of the heat-generating components. On the one hand, it can improve the utilization rate of space, and on the other hand, it can increase the heat dissipation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shows a schematic structural diagram of an energy storage device according to an embodiment of the present invention;

[0029] Figure 2 Shows a schematic structural diagram of a power housing according to an embodiment of the present invention;

[0030] Figure 3 Shows a schematic structural diagram of a power housing according to an embodiment of the present invention;

[0031] Figure 4 Shows a schematic structural diagram of a power circuit board according to an embodiment of the present invention;

[0032] Figure 5 Shows an exploded structural diagram of an energy storage device according to an embodiment of the present invention;

[0033] Figure 6 Shows a schematic structural diagram of a power housing according to an embodiment of the present invention;

[0034] Figure 7 Shows a schematic structural diagram of a power housing according to an embodiment of the present invention;

[0035] Figure 8 Shows an exploded structural diagram of an energy storage device according to an embodiment of the present invention;

[0036] Figure 9 Shows a schematic diagram of an energy storage component according to an embodiment of the present invention;

[0037] Figure 10 Shows a schematic diagram of an energy storage component according to an embodiment of the present invention;

[0038] Figure 11 Shows a schematic structural diagram of a power housing according to an embodiment of the present invention;

[0039] Figure 12 Shows a schematic structural diagram of a power circuit board according to an embodiment of the present invention;

[0040] Figure 13 Shows a schematic structural diagram of a battery housing according to an embodiment of the present invention.

[0041] Wherein, Figures 1 to 13 The corresponding relationship between the reference numerals and the component names in the figures is as follows:

[0042] 100: Energy storage device; 102: Box structure; 104: Power housing; 1042: First mounting opening; 106: Battery housing; 1062: Second mounting opening; 108: Power circuit board; 1082: Main board body; 1084: Heating component; 1085: Capacitor component; 1086: Inductor component; 1088: Extension board; 1088a: Input filter board; 1088b: Low-voltage drive board; 1088c: High-voltage drive board; 1088d: Main control board; 1088e: Insulated gate bipolar transistor; 110: Battery module; 114: Battery management and protection board; 116: Bracket board; 118: Heat dissipation fin; 1242: First avoidance groove; 1244: Second avoidance groove; 1246: Heat conduction protrusion; 1262: Mounting groove; 1264: Wiring groove; 128: Heat dissipation groove; 1302: Connecting column; 1304: First connection hole; 1306: Second connection hole; 1322: Positioning column; 1324: Column body; 1326: Positioning protrusion; 1328: Positioning hole;

[0043] 200: Energy storage component; 202: Power-on device. Detailed implementation manners

[0044] In order to more clearly understand the above-mentioned 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.

[0045] In the following description, many specific details are set forth 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 to the limitations of the specific embodiments disclosed below.

[0046] The following refers toFigures 1 to 13 Describe an energy storage device provided according to some embodiments of the present invention.

[0047] In view of this, as Figure 1 and Figure 8 shown, an embodiment of an energy storage device 100 is provided in this application, including a box structure 102, a power circuit board 108 and a battery module 110 disposed in the box structure 102. Among them, the box structure 102 includes a power housing 104 and a battery housing 106. The battery module 110 is disposed in the battery housing 106. Heat dissipation fins 118 are integrally provided on the power housing 104, which can effectively reduce the space for separately arranging the 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, and the power housing 104 and the battery housing 106 are adjacent in the front-rear direction, so as to effectively reduce the size of the overall energy storage device 100 in the front-rear direction. It should be emphasized that on this basis, the shape of the power housing 104 is structurally avoided for the heat-generating components 1084 with relatively large heat generation on the power circuit board 108, that is, under the action of one or more first avoidance grooves 1242 as shown in Figure 3 shown, the local space is reconfigured, and the heat generated by the heat-generating components 1084 can be conducted to the outside through the heat dissipation fins 118 in the corresponding area of the first avoidance groove 1242, so that on the basis of ensuring the heat dissipation effect, the size of the overall structure in the front-rear direction can be further reduced.

[0048] Furthermore, the heat dissipation fins 118 and the power housing 104 are integrally formed by a high-pressure die-casting process. A diversion groove is provided between two adjacent heat dissipation fins 118, which can be limited to be consistent with the direction of natural convection or forced air-cooled air flow to optimize the air flow distribution. In addition, the heat is directly conducted to the root of the corresponding fin through the bottom of the first avoidance groove 1242, shortening the heat transfer path and improving the heat dissipation efficiency.

[0049] Furthermore, a transverse reinforcing rib is designed at the root of the fin to improve the bending stiffness and also reduce the deformation amount under vibration conditions.

[0050] Furthermore, the first avoidance groove 1242 is opened on the inner wall surface of the rear side wall of the power housing 104 and corresponds to the heat-generating components 1084 one by one. For example Figure 4The insulated gate bipolar transistor 1088e (Insulate-Gate Bipolar Transistor, i.e., IGBT) and the metal-oxide-semiconductor field-effect transistor (i.e., Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) in it may have a width slightly larger than the projection of the heat-generating component 1084. For example, the single-direction dimension is 3 mm larger. Further, an insulating ceramic coating may be applied in the first avoidance groove 1242.

[0051] Among them, the components located on the power circuit board 108 may further include ordinary components. At this time, a third avoidance groove may be provided on the power housing 104, and space can be saved under the action of the third avoidance groove corresponding to the ordinary components.

[0052] After being assembled in place, a small spacing may be provided between the bottom of the first avoidance groove 1242 and the surface of the heat-generating component 1084. For example, it is not greater than 0.5 mm, and high thermal conductivity silicone grease is filled therein.

[0053] By embedding components in the first avoidance groove 1242, compared with the traditional 3-mm safety gap, the value of the safety spacing can be effectively reduced. For example, it is reduced to 0.5 mm, thereby reducing the thickness of the power housing 104 and finally reducing the total dimension of the whole machine in the front-rear direction.

[0054] In some embodiments, optionally, as Figure 4 and Figure 5 shown, by providing an additional expansion board 1088, different functions can be set according to requirements. Since the expansion board 1088 is provided on the rear side of the main board body 1082 and arranged using the dimension by which the heat-generating component 1084 protrudes from the main board body 1082, on the one hand, the possibility that the components of each expansion board 1088 are integrated onto the main board body 1082 to make the area of the main board body 1082 too large is reduced. On the other hand, the volume increase caused by separately providing an additional board body is minimized as much as possible, the dimension of the power circuit board 108 in the front-rear direction is reduced, and the redundant space between the rear side wall of the power housing 104 and the main board body 1082 is utilized to improve the space utilization rate.

[0055] Further, the expansion board 1088 can be connected to the main board body 1082 through an L-shaped bracket, so that the expansion board 1088 is perpendicular to the main board body 1082.

[0056] Further, the power circuit board 108 and the expansion board 1088 are electrically connected through a board-to-board connector or a flexible circuit.

[0057] Among them, the types of the expansion board 1088 include but are not limited to an input filter board 1088a, a low-voltage drive board 1088b, a high-voltage drive board 1088c, and a main control board 1088d.

[0058] In some embodiments, optionally, as Figure 2 shown, one or more second avoidance grooves 1244 are provided on the inner wall surface of the rear side wall of the power housing 104, which can correspond one-to-one to the projection area corresponding to the extension board 1088, so as to facilitate avoiding the extension board 1088, make full use of the protruding size of the heat generating component 1084, and take into account the functions of multiple extension boards 1088 without additionally extending the size of the power housing 104 in the front-back direction.

[0059] Furthermore, an insulating step may be provided at the edge of the second avoidance groove 1244.

[0060] When there are relatively protruding components on the extension board 1088, they can be arranged in the area corresponding to the second avoidance groove 1244. It can be understood that the shape of the second avoidance groove 1244 should be adapted to the shape of the extension board 1088 with the protruding components. The greater the degree of protrusion of the component, the larger the notch size of the second avoidance groove 1244, the larger the size of the extension board 1088, and the deeper the groove depth of the second avoidance groove 1244.

[0061] Furthermore, a positioning boss is provided at the edge of the extension board 1088, which is in clearance fit with the side wall of the second avoidance groove 1244.

[0062] Furthermore, the width of the second avoidance groove 1244 is 4 mm larger than the maximum outer contour size of the extension board 1088 (with a tolerance of 2 mm on each side).

[0063] In some embodiments, optionally, the dimensional relationship between the heat dissipation fins 118 and the first avoidance groove 1242 is defined, that is, in the front-back direction, the size of the heat dissipation fins 118 is larger than the groove depth of any first avoidance groove 1242, which can take into account the maximization of the heat dissipation efficiency and the compactness of the structure.

[0064] Furthermore, the root of the heat dissipation fins 118 is flush with the bottom of the first avoidance groove 1242, and the fins extend in the front-back direction, covering the avoidance groove area and expanding outward.

[0065] Furthermore, a flow guiding inclined surface is provided at the edge of the outer side surface of the first avoidance groove 1242, and the specific inclination angle can be selected as 45°, so as to guide the air flow into the fin gap.

[0066] Among them, the first avoidance groove 1242 only needs to be shallowly grooved to provide expansion space for the components, avoid weakening the strength of the housing by traditional deep grooves, the heat dissipation fins 118 extend in the front-back direction, reuse the external space of the housing, and the size increase of the whole machine in the front-back direction is less compared with the single-color heat dissipation fins 118 and the housing alone, and the degree of miniaturization is higher.

[0067] In some embodiments, optionally, the composite design of the installation groove 1262 nested in the first avoidance groove 1242 further optimizes the space utilization rate, heat dissipation efficiency, and assembly accuracy of the power housing 104. Among them, the installation groove 1262 is provided on the inner wall surface of the rear side wall of the power housing 104. The installation groove 1262 can be integrally die-cast with the housing. The first avoidance groove 1242 is located at the bottom of the installation groove 1262 and is recessed backward in the front-rear direction, so that the installation groove 1262 nests the first avoidance groove 1242, and the size of the power housing 104 in the front-rear direction is smaller.

[0068] Further, the power circuit board 108 is fixed to the positioning reference surface of the installation groove 1262 by four-corner countersunk screws.

[0069] Among them, the heat dissipation path of the heat-generating component 1084 is as follows: heat-generating component 1084 → phase change material → first avoidance groove 1242 → installation groove 1262 housing → heat dissipation fin 118.

[0070] Further, the first avoidance groove 1242 is embedded inside the installation groove 1262, reducing the size of the whole machine in the front-rear direction.

[0071] Further, a tapered flow channel is formed by the inner wall of the installation groove 1262 and the diversion inclined surface of the first avoidance groove 1242, improving the air flow velocity.

[0072] In some embodiments, optionally, wiring grooves 1264 are added on both sides of the installation groove 1262 of the power housing 104, specifically on the left and right sides, and extend along the gravity direction. The specific extension dimension can be the same as that of the installation groove 1262 or slightly longer than the dimension of the installation groove 1262 in the gravity direction, facilitating wiring in the wiring grooves 1264.

[0073] Further, a stepped hierarchical structure can be provided in the wiring groove 1264 to adapt to the hierarchical fixation of cables with different wire diameters.

[0074] Further, the groove wall of the wiring groove 1264 is pre-set with wire clamping buckle mounting holes for fixing nylon cable ties or metal clamps.

[0075] Among them, the wiring groove 1264 and the power housing 104 are integrally die-cast.

[0076] Further, a rounded corner guiding structure is provided at the edge of the groove opening of the wiring groove 1264 to prevent cable bending damage.

[0077] Further, high-voltage cables are arranged on the upper step, and low-voltage signal lines are located on the lower step, with a spacing ≥ 10 mm, reducing electromagnetic interference.

[0078] Alternatively, the high-voltage cable is disposed in the wiring groove 1264 on one side of the installation groove 1262, and the low-voltage signal line is disposed in the wiring groove 1264 on the other side of the installation groove 1262 to minimize the interference between them as much as possible.

[0079] Among them, the high-voltage cable includes positive and negative terminal connectors for connecting the photovoltaic system, and the low-voltage signal line includes an antenna for communication, a ground wire, etc.

[0080] In some embodiments, optionally, as Figure 2 shown, heat-conducting protrusions 1246 are provided on the inner wall surface of the rear side wall of the power housing 104, and the insulating and heat-conducting contact area and the gap isolation area are designed differently to achieve directional and efficient heat dissipation.

[0081] Furthermore, the heat-conducting protrusion 1246 is a cylindrical or square-columnar boss, and the diameter / side length matches the projection of the heat-generating component 1084. The surface of the protrusion is precision milled, and an insulating and heat-conducting structure, such as a gasket or an elastic heat-insulating foam, is filled between the heat-conducting protrusion 1246 and the heat-generating component 1084.

[0082] Among them, high heat-generating components such as IGBTs and MOS transistors are in direct contact with the heat-conducting protrusion 1246 through the insulating and heat-conducting structure, while low heat-generating components such as resistors and signal capacitors can maintain a gap with the heat-conducting protrusion 1246 and rely on natural convection for heat dissipation to avoid local overheating of the housing caused by excessive heat conduction.

[0083] Among them, the gap area is filled with silicone rubber foam, which expands and deforms by absorbing the heat of the components.

[0084] Among them, the high heat-generating components can be aligned with the center of the heat-conducting protrusion 1246, and the heat is conducted directionally.

[0085] In some embodiments, optionally, as Figure 8 、 Figure 11 and Figure 13As shown, through the precise docking design of the first installation port 1042 and the second installation port 1062, combined with the parallel or approximately parallel layout of the main board body 1082 and the installation port plane, efficient assembly is achieved. 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 port 1042 and a second installation port 1062 on the facing side. That is, the power housing 104 and the battery housing 106 are adjacent to each other in the front-rear direction. The first installation port 1042 is opened on the contact surface of the power housing 104, and the second installation port 1062 is opened on the contact surface of the battery housing 106. After installation, a battery module 110 is arranged in the battery housing 106, and a 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 highly sensitive to electromagnetic interference, the mutual interference between the two can be reduced through compartmentalization.

[0086] By restricting the plane of the main board body 1082 to be parallel or approximately parallel to the plane of the first installation port 1042, when the main board body 1082 is assembled onto the power housing 104, the overall structure has a relatively small size in the front-rear direction. The main board body 1082 is parallel to the installation port plane (i.e., perpendicular to the heat dissipation fins 118), and the heat of the heat-generating components 1084 is directly conducted to the root of the fins.

[0087] The heat dissipation air duct is perpendicular to the plane of the main board body 1082, and the air flow resistance is relatively low, which can improve the convective heat dissipation efficiency.

[0088] In some embodiments, optionally, as Figure 6 and Figure 7 shown, a heat dissipation groove 128 is provided on the outer wall surface of the rear side wall. Through the nested design of the heat dissipation groove 128 and the heat dissipation fins 118, the heat dissipation groove 128 is arranged on the outer wall surface of the rear side wall of the power housing 104 and extends along the gravity direction. One end of the heat dissipation fins 118 in the front-rear direction is integrally formed with the bottom 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.

[0089] Furthermore, the first avoidance groove 1242 is opened in the rib region between the heat dissipation grooves 128, and the depth is matched with that of the heat dissipation groove 128 to avoid weakening the overall strength of the housing.

[0090] It can be understood that the heat dissipation fins 118 are embedded in the heat dissipation groove 128, and by using the heat conduction of the groove side wall, the effective heat dissipation area can be significantly increased.

[0091] Among them, by restricting the extension dimension of the heat dissipation fins 118 not to be greater than the depth of the heat dissipation groove 128, the fins are completely embedded in the groove, and the overall front-rear dimension of the whole machine only increases by the groove depth.

[0092] In some embodiments, optionally, the power circuit board 108 is fixed to the power housing 104 by a threaded fit. Specifically, as Figure 11 and Figure 12 shown, connection posts 1302 are provided on the power housing 104. A first connection hole 1304 with a thread is provided at one end of the connection post 1302. By providing a second connection hole 1306 on the main board 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 a connecting member, thereby realizing the detachable connection between the power circuit board 108 and the power housing 104.

[0093] Furthermore, 6 to 10 connection posts 1302 can be provided on the power circuit board 108 and are distributed in a rectangular array. An M3 threaded hole, that is, the first connection hole 1304, is provided inside the connection post 1302. A second connection hole 1306 without a thread is provided at the corresponding position of the power circuit board 108. The second connecting member can be a screw, and the connection between the power circuit board 108 and the power housing 104 can be realized by tightening the screw.

[0094] Among them, a 2mm guiding taper angle is provided at the top of the connection post 1302 to automatically correct the position deviation when inserting into the second connection hole 1306.

[0095] Among them, the connection post 1302 and the power housing 104 can be integrally processed and formed.

[0096] In some embodiments, optionally, since a plurality of heat generating components 1084 are provided on the side of the main board body 1082 of the power circuit board 108 facing the rear side wall, and a plurality of first avoidance grooves 1242 with matching shapes are provided on the rear side wall of the power housing 104. When assembling the main board body 1082 onto the power housing 104, the protruding heat generating components 1084 may collide with the first avoidance grooves 1242, resulting in detachment or failure. Therefore, through the precise fit design of the positioning post 1322 and the positioning hole 1328, pre-positioning of the main board body 1082 is realized.

[0097] Specifically, the positioning post 1322 includes a column body 1324 and a positioning protrusion 1326. The column body 1324 is arranged on the inner wall surface of the rear side wall of the power housing 104 in the front-rear direction, and the positioning protrusion 1326 is arranged at the front end of the column body 1324. The shape of the positioning hole 1328 is mirror-symmetrical to the positioning protrusion 1326. For example, a D-shaped protrusion corresponds to a D-shaped hole. After the main board body 1082 is connected to the column body 1324 through the cooperation of the positioning hole 1328 and the positioning protrusion 1326, locking and fixing can be realized through the cooperation of the above-mentioned first connection hole 1304, second connection hole 1306 and the connecting member.

[0098] Furthermore, an annular reinforcing rib is provided at the root of the main body.

[0099] In some embodiments, optionally, asFigure 4 As shown, the heating components 1084 are classified into capacitor components 1085 and inductor components 1086 according to their categories. For the multiple first avoidance grooves 1242, the shapes and positions of the first avoidance grooves 1242 are set according to the specific types and corresponding positions of the heating components 1084. For example, the shape of the first avoidance groove 1242 corresponding to the capacitor component 1085 can be a cylindrical groove adapted to an electrolytic capacitor or a rectangular parallelepiped groove adapted to a thin film capacitor. The size of the first avoidance groove 1242 needs to be larger than the outer diameter of the capacitor component 1085, specifically 1 mm to 2 mm larger. The shape of the first avoidance groove 1242 corresponding to the inductor component 1086 can be a U-shaped groove or a stepped groove, and the groove depth needs to cover at least 90% of the height of the inductor component 1086.

[0100] In addition, the present application also provides an embodiment of an energy storage system 200. At least one power supply device 202 is provided at the bottom of the energy storage device 100, specifically as Figure 9 shown, 1 power supply device 202 is provided at the bottom of the energy storage device 100 to enhance the electricity storage capacity of the energy storage system 200, or as Figure 10 shown, 2 power supply devices 202 are provided at the bottom of the energy storage device 100 to further enhance the electricity storage capacity.

[0101] In some embodiments, optionally, as Figure 5 shown, a battery management and protection board 116 is provided. Part or all of the structure of the battery management and protection board 114 is arranged in the power housing 104 and is arranged on the side of the power circuit board 108 facing the first mounting opening 1042 (i.e., the docking surface close to the battery housing 106), with a small distance from the power circuit board 108, so that structures such as the battery management and protection board 114 and the power circuit board 108 are centrally arranged. When connecting the two, the wiring 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 wiring harnesses at the same time.

[0102] Furthermore, the battery management and protection board 114 is located in the docking area between the power housing 104 and the battery housing 106, and 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.

[0103] In some embodiments, optionally, a support plate 116 detachably connected to the power housing 104 is provided inside the power housing 104. 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, it can reduce the electromagnetic interference between the battery management and protection board 114 and the power circuit board 108, ensuring the normal operation of the circuit board. On the other hand, under the action of the support plate 116, it can play a certain heat insulation effect, separating the heat of the power circuit board 108 and the heat of the battery management and protection board 114 as much as possible, and at the same time reducing the heat transfer to the battery module 110.

[0104] 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.

[0105] 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.

[0106] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" 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.

[0107] 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 construed as a limitation of the present invention.

[0108] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means 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 can be combined in a suitable manner in any one or more embodiments or examples.

[0109] 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, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, 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: include: A box structure, the box structure comprising a power housing and a battery housing adjacently arranged in the front-to-back direction, the power housing and the battery housing being detachably connected, the side of the power housing away from the battery housing being a rear side wall, the outer wall surface of the rear side wall being provided with a plurality of heat dissipation fins arranged at intervals, the power housing and the heat dissipation fins being integrally formed; A power circuit board is arranged in the power housing, the power circuit board includes a main board body and a plurality of heating components arranged on the main board body, the main board body is detachably connected to the power housing, and the heating components are arranged on a side of the main board body away from the battery housing; A plurality of first avoidance grooves are arranged on the inner wall surface of the rear side wall of the power housing, and the plurality of first avoidance grooves are respectively arranged corresponding to the plurality of heat generating components; A battery module is disposed in the battery housing, and the battery module is electrically connected to the power circuit board.

2. The energy storage device according to claim 1, characterized in that: The power circuit board also includes: At least one expansion board is electrically connected to the main board body, and the at least one expansion board is arranged on the rear side of the main board body.

3. The energy storage device according to claim 2, characterized in that: The power housing also includes: At least one second avoidance groove is arranged on the inner wall surface of the rear side wall of the power housing, and the at least one second avoidance groove is arranged corresponding to the at least one expansion board respectively.

4. The energy storage device according to claim 1, characterized in that: The dimension of the heat dissipation fin in the front-to-rear direction is greater than the depth of any one of the first avoidance grooves.

5. The energy storage device according to claim 1, characterized in that: The power housing also includes: A mounting groove is provided on the inner wall surface of the rear side wall of the power housing; Wherein, the first avoidance groove is arranged at the groove bottom of the installation groove, and the first avoidance groove is recessed backward along the front-rear direction.

6. The energy storage device according to claim 5, characterized in that: The power housing also includes: The wiring grooves are arranged on both sides of the installation groove, and the wiring grooves extend along the direction of gravity.

7. The energy storage device according to claim 5, characterized in that: The power housing also includes: A heat-conducting protrusion is arranged on the inner wall surface of the rear side wall, and the heat-conducting protrusion is arranged opposite to the heat-generating component; Among them, an insulating heat-conducting structure is provided between at least part of the heat-generating components and the heat-conducting protrusions, and a gap exists between at least part of the heat-generating components and the heat-conducting protrusions.

8. The energy storage device according to any one of claims 1 to 7, characterized in that: A first mounting opening is provided on a side of the power housing facing the battery housing, and a second mounting opening is provided on a side of the battery housing facing the power housing, and the battery housing and the power housing are detachably connected through the first mounting opening and the second mounting opening; Wherein, the plane where the main board body is located is parallel to the plane where the first mounting opening is located, or the angle between them is smaller than a preset angle.

9. The energy storage device according to any one of claims 1 to 7, characterized in that: The power housing also includes: A heat dissipation groove is provided on the outer wall surface of the rear side wall, wherein one end of the heat dissipation fin in the front-to-back direction is connected to the groove bottom of the heat dissipation groove, and the extension dimension of the heat dissipation fin in the front-to-back direction is not greater than the groove depth of the heat dissipation groove; Wherein, the groove depth of any one of the first avoidance grooves is not greater than the groove depth of the heat dissipation groove.

10. The energy storage device according to any one of claims 1 to 7, characterized in that: The energy storage device also includes: A connecting column, arranged on the inner wall surface of the rear side wall, wherein a first connecting hole is arranged in the connecting column; A second connection hole is provided on the main board; Wherein, the connecting piece passes through the second connecting hole and is threadedly connected to the first connecting hole.

11. The energy storage device according to any one of claims 1 to 7, characterized in that: Also includes: A positioning column, arranged on the inner wall surface of the rear side wall along the front-to-back direction, the positioning column comprising a column body and a positioning protrusion arranged at one end of the column body; A positioning hole is provided on the main board body, and the shape of the positioning hole matches the shape of the positioning protrusion; Wherein, the main board body is stopped at one end of the column through the cooperation between the positioning hole and the positioning protrusion.

12. The energy storage device according to claim 1, characterized in that: The heat generating components include capacitor components and inductor components. The shapes of some of the first avoidance grooves among the plurality of the first avoidance grooves are adapted to the shapes of the capacitor components, and the shapes of some of the first avoidance grooves among the plurality of the first avoidance grooves are adapted to the shapes of the inductor components.

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