Energy storage power supply

Abstract

The present invention relates to the technical field of energy storage devices, and discloses an energy storage power supply comprising a battery pack, an inverter, and a housing. The battery pack and the inverter are both mounted in an inner cavity of the housing. The inverter comprises a plurality of heating elements of varying heights. The housing comprises a first shell, the inverter is fixedly connected to the first shell, a plurality of heat-conducting brackets of varying heights are provided on the inner side of the first shell, and the plurality of heating elements are respectively thermally connected to the heat-conducting brackets of corresponding heights to dissipate heat outward through the first shell. The energy storage power supply provided by the present invention uses the first shell as both a mounting component and a heat dissipation component of the inverter, resulting in a compact structure. The plurality of heat-conducting brackets are respectively thermally connected to the heating elements, significantly improving the efficiency of heat dissipation. There is no need to provide a cooling fan or convection air duct, making it easier to achieve waterproofing.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage equipment, and in particular to an energy storage power supply. Background Art

[0002] Heat generation in energy storage devices primarily occurs in the inverter and battery cells. A common solution to this heat dissipation problem involves installing a heat sink on the inverter, securing the inverter in a separate housing and attaching a fan to the inverter housing. This forced convection from the fan cools heat-generating components like the battery cells, MOSFET (metal-oxide semiconductor field-effect transistor), and transformer. However, air cooling requires additional fans, resulting in a large number of parts and complex assembly. Furthermore, the need for air ducts for convection makes waterproofing the product difficult.

[0003] Therefore, there is an urgent need for energy storage power supplies to solve the above technical problems. Summary of the Invention

[0004] Based on the above, the purpose of the present invention is to provide an energy storage power supply, in which the first shell serves as both the mounting component and the heat dissipation component of the inverter, has a compact structure, and multiple heat-conducting brackets are respectively thermally connected to the heating elements, thereby greatly improving the efficiency of heat dissipation. There is no need to set up a cooling fan and a convection air duct, making it easier to achieve waterproofing.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An energy storage power supply is provided, comprising a battery pack, an inverter, and a housing. The battery pack and the inverter are both installed in an inner cavity of the housing. The inverter includes multiple heating elements of different heights. The housing includes a first shell. The inverter is fixedly connected to the first shell. Multiple heat-conducting brackets of different heights are provided on the inner side of the first shell. The multiple heating elements are respectively thermally connected to the heat-conducting brackets of corresponding heights to dissipate heat outward through the first shell.

[0007] As an optional technical solution for the energy storage power supply, the heating element is pressed against the heat-conducting bracket of corresponding height; and / or

[0008] The heating element is locked to the heat-conducting bracket at a corresponding height.

[0009] As an optional technical solution for the energy storage power supply, the inverter further includes a PCB, and the plurality of heating elements are all arranged on a side of the PCB facing the heat-conducting bracket.

[0010] As an alternative technical solution for the energy storage power supply, the heating element includes a MOS. The MOS includes a main body portion and pins. The main body portion is attached to the heat conducting bracket by screws. One end of the pin is connected to the main body portion along a direction parallel to the board surface of the PCB, and the other end of the pin is bent towards the PCB and connected to the PCB.

[0011] As an alternative technical solution for the energy storage power supply, the housing further includes a second housing. The first housing and the second housing enclose to form the inner cavity, and the battery pack is fixedly connected to the second housing.

[0012] As an alternative technical solution for the energy storage power supply, the battery pack includes a plurality of sub - cell modules and a module support assembly. The module support assembly is fixedly connected to the second housing. The module support assembly is provided with a plurality of through - arranged mounting holes, and the sub - cell modules are respectively inserted into the mounting holes in one - to - one correspondence.

[0013] As an alternative technical solution for the energy storage power supply, the plurality of mounting holes are all arranged to penetrate horizontally. The second housing is arranged in a "凵" - shaped structure with an upward opening. The two side walls of the second housing are respectively in heat conduction connection with the two ends of the plurality of sub - cell modules, or the two side walls of the second housing are respectively thermally isolated from the two ends of the plurality of sub - cell modules.

[0014] As an alternative technical solution for the energy storage power supply, the energy storage power supply further includes a heat conducting cushion layer. The heat conducting cushion layer is arranged between the battery pack and the second housing, and the end of the sub - cell module and the side wall of the second housing are in heat conduction connection through the heat conducting cushion layer; or

[0015] The energy storage power supply further includes a heat insulating cushion layer. The heat insulating cushion layer is arranged between the battery pack and the second housing, and the end of the sub - cell module and the side wall of the second housing are thermally isolated through the heat insulating cushion layer.

[0016] As an alternative technical solution for the energy storage power supply, the first housing is arranged in a "冂" - shaped structure with a downward opening. The first housing and the second housing are arranged opposite to each other and connected, and the side wall of the first housing extends downward to the side of the battery pack.

[0017] As an alternative technical solution for the energy storage power supply, the heat conducting bracket is integrally formed with the first housing or connected by welding.

[0018] As an alternative technical solution for the energy storage power supply, the first housing is made of a metal material; and / or

[0019] The outer side surface of the first housing is provided with first heat dissipation fins integrally formed with it.

[0020] The beneficial effects of the present invention are:

[0021] The energy storage power supply provided by the present invention directly secures the inverter to a first housing, and disposes multiple thermally conductive brackets of varying heights on the inner side of the first housing to thermally connect the various heating elements on the inverter. This allows the heat generated by each heating element to be transferred to the first housing via the thermally conductive brackets and then dissipated. The first housing serves as both the inverter's mounting component and heat dissipation component, dissipating heat through natural heat dissipation. The compact structure significantly improves heat dissipation efficiency by thermally connecting multiple thermally conductive brackets to the heating elements. This eliminates the need for a cooling fan, reduces the number of parts, simplifies assembly steps, reduces noise, and improves the user experience. There is no need to reserve convection ducts for air cooling and heat dissipation, allowing the product to be configured as a sealed structure, making it easier to achieve waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the energy storage power supply provided in the first embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the decomposed structure of the energy storage power supply provided in the first embodiment of the present invention;

[0025] Figure 3 1 is a schematic diagram of the installation structure of the first housing and the inverter provided in the first embodiment of the present invention;

[0026] Figure 4 is a structural schematic diagram of the first shell provided in Example 1 of the present invention;

[0027] Figure 5 1 is a schematic structural diagram of an inverter provided in Embodiment 1 of the present invention;

[0028] Figure 6 is a structural diagram of a first heating element provided in Example 1 of the present invention;

[0029] Figure 7 1 is a schematic diagram of the installation structure of the second housing and the battery pack provided in the first embodiment of the present invention;

[0030] Figure 8 is a cross-sectional view of the installation structure of the second housing and the battery pack provided in the first embodiment of the present invention;

[0031] Figure 9 It is a cross-sectional view of the partial installation structure of the second shell and the battery pack provided in the first embodiment of the present invention.

[0032] In the picture:

[0033] 10. Inverter; 11. First heating element; 111. Main body; 112. Pins; 12. Second heating element; 13. PCB; 131. Mounting clearance hole;

[0034] 20. Battery pack; 21. Sub-cell module; 22. First module bracket; 23. Second module bracket; 24. Busbar; 25. Thermal pad; 201. Mounting hole;

[0035] 30. First housing; 31. Heat-conducting bracket; 32. Mounting bracket; 33. First heat dissipating fin; 34. First inner boss;

[0036] 40. Second housing; 41. Second heat dissipation fins; 42. Second inner boss;

[0037] 50. Front shell; 60. Back shell. DETAILED DESCRIPTION

[0038] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only part of the structures related to the present invention, rather than all of the structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] Example 1

[0043] like Figures 1-9 As shown, this embodiment provides an energy storage power supply, which includes a battery pack 20, an inverter 10 and a shell. The battery pack 20 and the inverter 10 are both installed in the inner cavity of the shell. The shell includes a first shell 30, a second shell 40, a front shell 50 and a rear shell 60. The first shell 30 and the second shell 40 are arranged opposite to each other and are respectively located on the upper and lower sides. The first shell 30, the second shell 40, the front shell 50 and the rear shell 60 together enclose an inner cavity.

[0044] Furthermore, the inverter 10 includes multiple heating elements of different heights. The inverter 10 is fixedly connected to the first shell 30. The inner side of the first shell 30 is provided with multiple heat-conducting brackets 31 of different heights. The heat-conducting brackets 31 and the first shell 30 are both made of a good thermal conductor material. The multiple heating elements are respectively thermally connected to the heat-conducting brackets 31 of corresponding heights to dissipate heat outward through the first shell 30.

[0045] Specifically, the energy storage power supply provided in this embodiment directly fixes the inverter 10 on the first housing 30, and a plurality of heat conducting brackets 31 with different heights are arranged inside the first housing 30 to conductively connect each heating element on the inverter 10, so that the heat generated by each heating element is transferred to the first housing 30 through the heat conducting brackets 31 and then dissipated. The first housing 30 serves as both the installation component and the heat dissipation component of the inverter 10, dissipating heat in the form of natural heat dissipation, with a compact structure. Moreover, by means of respectively conductively connecting the plurality of heat conducting brackets 31 with the heating elements, the efficiency of heat dissipation is greatly improved. There is no need to set up a cooling fan, reducing the number of parts, simplifying the assembly steps, reducing noise and enhancing the user experience. There is also no need to reserve a convection air duct for air cooling. Therefore, the product can be set as a sealed structure, making it easier to achieve waterproofing.

[0046] Exemplarily, as Figure 1 and Figure 2 shown, the first housing 30 is set as a "冂"-shaped structure with the opening facing downwards, forming a top wall at the top and side walls on the left and right sides. A plurality of heat conducting brackets 31 are all arranged on the lower surface of the top wall. The second housing 40 is set as a "凵"-shaped structure with the opening facing upwards, forming a bottom wall at the bottom and side walls on the left and right sides. The first housing 30 and the second housing 40 are arranged facing each other. The front shell 50 is connected to the front openings of the first housing 30 and the second housing 40, and the rear shell 60 is connected to the rear openings of the first housing 30 and the second housing 40.

[0047] In this embodiment, the side walls of the first housing 30 and the side walls of the second housing 40 are buckled with each other. The front shell 50 is connected to the first housing 30 and the second housing 40 by screws, and the rear shell 60 is connected to the first housing 30 and the second housing 40 by screws. Waterproof glue is coated on the connection gaps between the respective housings to achieve sealing and waterproofing. In other embodiments, the first housing 30 and the second housing 40 can also be connected by screws or welding, and the front shell 50 and the rear shell 60 can also be installed through structures such as buckles.

[0048] Exemplarily, as Figure 3-Figure 5 shown, the inverter 10 further includes a PCB (Printed Circuit Board) 13. A plurality of heating elements are all arranged on one side of the PCB 13 facing the heat conducting brackets 31. The heating elements include a first heating element 11 and a second heating element 12. Among them, the first heating element 11 is a MOS, and the second heating element 12 is an inductor or a transformer. The first heating element 11 and the second heating element 12 are both welded to the PCB 13. The height of the first heating element 11 is not equal to the height of the second heating element 12. Therefore, the heights of the plurality of heat conducting brackets 31 are also different. The sum of the height of the heat conducting bracket 31 and the height of its corresponding heating element is equal to the distance between the top wall of the first housing 30 and the PCB 13.

[0049] For example, Figure 3 and Figure 4 As shown, a plurality of mounting brackets 32 are further provided on the inner side of the top wall of the first housing 30 , and the mounting brackets 32 are fastened to the PCB 13 by screws.

[0050] For example, the first housing 30 is made of a metal material such as aluminum alloy or copper alloy, which has good thermal conductivity. Furthermore, the second housing 40, the front housing 50, and the rear housing 60 are all made of a metal material such as aluminum alloy or copper alloy, which makes the overall structure stronger and can cope with ultra-low temperature conditions.

[0051] For example, the heat-conducting bracket 31 is integrally formed with the first housing 30, so that the heat of the heating element can be directly transferred to the first housing 30, avoiding the contact thermal resistance caused by the multi-layer heat-conducting structure. In other embodiments, the heat-conducting bracket 31 and the first housing 30 can also be connected by welding.

[0052] Illustratively, the mounting bracket 32 ​​is integrally formed with the first shell 30 .

[0053] For example, Figure 3 As shown, the heating elements are pressed against the heat-conducting bracket 31 of corresponding height. Specifically, the tops of the first heating element 11 and the second heating element 12 are directly pressed against the corresponding heat-conducting bracket 31 to directly conduct heat.

[0054] For example, Figure 3-Figure 6 As shown, the heating element is locked to the thermal bracket 31 of the corresponding height. In this embodiment, the first heating element 11 is locked to the thermal bracket 31. Specifically, the first heating element 11 includes a main body 111 and a pin 112. The main body 111 is locked to the thermal bracket 31 by screws. The position corresponding to the first heating element 11 on the PCB 13 is provided with an installation clearance hole 131, which allows the operator to pass through the PCB 13 to lock the first heating element 11 to the thermal bracket 31. One end of the pin 112 is connected to the main body 111 along a direction parallel to the board surface of the PCB 13, and the other end of the pin 112 is bent toward the PCB 13 and connected to the PCB 13 to prevent the first heating element 11 from being subjected to stress when tightening the screws, which may cause the pin 112 to crack.

[0055] For example, Figure 3-Figure 6 As shown, the same heat-conducting bracket 31 can be locked and connected to multiple first heating elements 11 to improve the compactness of the structure.

[0056] For example, the heating element may also be connected to the heat-conducting bracket 31 by means of a buckle or other structure.

[0057] Exemplarily, thermal grease is coated between the heating element and the heat-conducting bracket 31 to fill the air gap, further improving the efficiency of the heating element in conducting heat to the heat-conducting bracket 31, thereby improving the heat dissipation effect.

[0058] For example, Figure 1-Figure 3 As shown, the outer side surface of the first housing 30 is provided with a first heat dissipation fin 33 integrally formed therewith, which increases the convection area between the first housing 30 and the outside, further enhancing the heat dissipation effect.

[0059] For example, Figure 2 、 Figure 7-Figure 9 As shown, the battery pack 20 is fixedly connected to the second shell 40. Specifically, the battery pack 20 includes a plurality of sub-cell modules 21 and a module bracket assembly. The module bracket assembly is fixedly connected to the second shell 40. The module bracket assembly is provided with a plurality of mounting holes 201 passing through in the horizontal direction. The sub-cell modules 21 are respectively passed through the mounting holes 201.

[0060] For example, Figure 2 、 Figure 7-Figure 9 As shown, the module bracket assembly includes a first module bracket 22 and a second module bracket 23. The first module bracket 22 and the second module bracket 23 are both fastened to the bottom wall of the second shell 40 by screws. The first module bracket 22 and the second module bracket 23 are snap-fitted together, and the mounting hole 201 passes through the first module bracket 22 and the second module bracket 23.

[0061] For example, Figure 2 、 Figure 7-Figure 9 As shown, the two side walls of the second shell 40 are thermally connected to the two ends of multiple sub-cell modules 21. The sub-cell module 21 can be a number of battery cells arranged side by side, or a single sheet-shaped battery cell. Busbars 24 made of copper or aluminum are respectively provided at both ends of the sub-cell module 21. The poles of each battery cell are welded to form a module through the busbars 24. The sub-cell module 21 is thermally connected to the two side walls of the second shell 40 through the busbars 24 at both ends. Because the second shell 40 is made of a good thermal conductor, the heat generated by the sub-cell module 21 can be dissipated through the second shell 40.

[0062] For example, Figure 1-Figure 4 As shown, the side walls of the first shell 30 extend downward to the side of the battery pack 20, and some sub-cell modules 21 are thermally connected to the two side walls of the first shell 30 through the bus bars 24 at both ends, so that part of the heat from the sub-cell modules 21 is dissipated through the first shell 30.

[0063] For example, Figure 3 and Figure 4As shown, a plurality of first inner bosses 34 are provided on the inner sides of the two side walls of the first shell 30. The first inner bosses 34 assist in defining the installation position of the battery pack 20 on the one hand, and serve as a heat transfer structure to be thermally connected to the bus 24 on the other hand.

[0064] For example, Figure 7-Figure 9 As shown, a plurality of second inner bosses 42 are provided on the inner sides of the two side walls of the second shell 40. The first inner bosses 34 assist in defining the installation position of the battery pack 20 on the one hand, and on the other hand serve as a heat transfer structure to be thermally connected to the bus 24.

[0065] For example, Figure 2 、 Figure 8 and Figure 9 As shown, the energy storage power supply also includes two thermal pads 25, which are respectively arranged between the battery pack 20 and the two side walls of the second shell 40 and the two side walls of the first shell 30. The thermal pads 25 are interference fit with the side walls of the second shell 40, and the ends of the sub-cell modules 21 and the side walls of the second shell 40 and the side walls of the first shell 30 are thermally connected through the corresponding thermal pads 25, thereby improving the thermal conductivity efficiency.

[0066] In this embodiment, the thermal pad layer 25 is made of thermally conductive silicone material.

[0067] For example, Figure 7-Figure 9 As shown, the outer side surface of the second housing 40 is provided with second heat dissipation fins 41 integrally formed therewith, which increase the convection area between the second housing 40 and the outside and further enhance the heat dissipation effect.

[0068] Example 2

[0069] Based on the first embodiment, this embodiment provides another energy storage power supply, which differs from the first embodiment in that:

[0070] The two side walls of the second housing are thermally isolated from both ends of the multiple sub-cell modules, and the two side walls of the first housing are thermally isolated from both ends of the multiple sub-cell modules. In this embodiment, the energy storage power supply does not include a thermally conductive padding layer, but rather includes two thermally insulating padding layers, which are respectively disposed between the battery pack and the two side walls of the second housing, and the two side walls of the first housing. The ends of the sub-cell modules are thermally isolated from the side walls of the second housing by the thermally insulating padding layers.

[0071] Specifically, in an energy storage power supply in which the sub-cell module itself does not generate much heat but is easily affected by the heat generated by the inverter, the provision of the thermal insulation pad can prevent the heat generated by the inverter from being transferred to the sub-cell module through the first shell and the second shell, thereby improving the working stability of the energy storage power supply.

[0072] Exemplarily, the thermal insulation cushion layer is made of thermal insulation foam or silicone foam.

[0073] Example 3

[0074] Based on the second embodiment, this embodiment provides another energy storage power supply, which differs from the second embodiment in that:

[0075] The energy storage power supply does not include an insulating pad. The battery pack is spaced apart from the two side walls of the second shell and the two side walls of the first shell to reduce the heat generated by the inverter from being transferred to the sub-cell module through the first shell and the second shell, thereby improving the working stability of the energy storage power supply.

[0076] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An energy storage power supply comprising a battery pack, an inverter, and a housing, wherein the battery pack and the inverter are both installed in an inner cavity of the housing, and the inverter comprises a plurality of heating elements of different heights, characterized in that: The housing includes a first housing body, the inverter is fixedly connected to the first housing body, and a plurality of heat conduction brackets with different heights are provided inside the first housing body. The plurality of heating elements are respectively in heat conduction connection with the heat conduction brackets corresponding to their heights, so as to dissipate heat outward through the first housing body; The inverter further includes a PCB, the heating element includes a MOS, the MOS includes a main body portion and pins. The main body portion is locked to the heat conduction bracket by screws. One end of the pin is connected to the main body portion along a direction parallel to the plane of the PCB, and the other end of the pin is bent towards the PCB and connected to the PCB; The housing further includes a second housing body. The first housing body and the second housing body enclose to form the inner cavity body, and the battery pack is fixedly connected to the second housing body; The battery pack includes a plurality of sub-cell modules and a module bracket assembly. The module bracket assembly is fixedly connected to the second housing body. A plurality of through holes are provided in the module bracket assembly, and the sub-cell modules are respectively inserted into the through holes in a one-to-one correspondence; the plurality of through holes are all arranged horizontally through, and the second housing body is arranged in a "U" shape with an upward opening; Two side walls of the second housing body are respectively in heat conduction connection with two ends of the plurality of sub-cell modules; the energy storage power supply further includes a heat conduction cushion layer, and the heat conduction cushion layer is arranged between the battery pack and the second housing body. The end of the sub-cell module and the side wall of the second housing body are in heat conduction connection through the heat conduction cushion layer; or Two side walls of the second housing body are respectively thermally isolated from two ends of the plurality of sub-cell modules; the energy storage power supply further includes a heat insulation cushion layer, and the heat insulation cushion layer is arranged between the battery pack and the second housing body. The end of the sub-cell module and the side wall of the second housing body are thermally isolated through the heat insulation cushion layer.

2. The energy storage power supply according to claim 1, characterized in that: [[ID= 6]]The heating element presses against the heat conduction bracket corresponding to its height; and / or The heating element is locked to the heat conduction bracket corresponding to its height.

3. The energy storage power supply according to claim 2, characterized in that: The plurality of heating elements are all arranged on one side of the PCB facing the heat conduction bracket.

4. The energy storage power supply according to claim 1, characterized in that: The first housing body is arranged in a "ㄇ" shape with a downward opening. The first housing body and the second housing body are arranged facing each other and connected, and the side wall of the first housing body extends downward to the side of the battery pack.

5. The energy storage power supply according to any one of claims 1 to 4, characterized in that: The heat conduction bracket is integrally formed with the first housing body or connected by welding.

6. The energy storage power supply according to any one of claims 1 to 4, characterized in that: The first housing body is made of a metal material; and / or The outer side surface of the first housing body is provided with first heat dissipation fins integrally formed with it.

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