Energy storage device and energy storage system

Abstract

This application discloses an energy storage device and system, belonging to the field of battery technology. The energy storage device includes a housing, a battery module, a power conversion module, and a first heat dissipation component. The housing has a first opening, and both the battery module and the power conversion module are disposed inside the housing. The first heat dissipation component is connected to the housing and seals the first opening. The first heat dissipation component is thermally connected to both the battery module and the power conversion module. By simultaneously thermally connecting the power conversion module and the battery module to the first heat dissipation component, and allowing both the power conversion module and the battery module to share the same heat dissipation component, this application improves both space utilization and the overall heat dissipation efficiency of the energy storage device.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to an energy storage device and energy storage system. Background Technology

[0002] Energy storage devices with power conversion modules can achieve more efficient photovoltaic-storage synergy, and are therefore more widely used in residential photovoltaic systems. They can store excess electricity during the day for nighttime use, reducing dependence on the grid. However, the battery modules and power conversion modules within the energy storage device generate relatively more heat, which can affect the overall efficiency of the energy storage device. Summary of the Invention

[0003] Purpose of the invention: This application provides an energy storage device to solve the problem that the battery module and power conversion module in existing energy storage devices generate a lot of heat, which affects the overall efficiency of the energy storage device; another purpose of this application is to provide an energy storage system.

[0004] Technical solution: An energy storage device according to an embodiment of this application includes:

[0005] The box has a first opening;

[0006] Both the battery module and the power conversion module are housed inside the enclosure;

[0007] The first heat dissipation component is connected to the housing and covers the first opening; the first heat dissipation component is thermally connected to the battery module and the power conversion module respectively.

[0008] In some embodiments, the battery module and the power conversion module are spaced apart; the power conversion module includes:

[0009] Heat shield;

[0010] A power conversion circuit is disposed inside the heat insulation cover, and the power conversion circuit is thermally connected to the first heat dissipation component.

[0011] The insulation layer is attached to the inner wall of the heat insulation cover.

[0012] In some embodiments, the heat shield is sealed to the first heat dissipation component to form a closed heat-insulating space;

[0013] The power conversion circuit is disposed within the heat insulation space and is thermally connected to the first heat dissipation component.

[0014] The first heat dissipation component is detachably connected to the housing.

[0015] In some embodiments, the heat insulation cover has a closed heat insulation space, the heat insulation cover includes a cover body and a heat-conducting wall, the heat-conducting wall is connected to the cover body to form the heat insulation space; the heat-conducting wall is thermally connected to the first heat dissipation component;

[0016] The power conversion circuit is disposed within the heat-insulating space and is thermally connected to the heat-conducting wall.

[0017] The insulation layer is attached to the inner wall of the cover.

[0018] In some embodiments, the first heat dissipation component includes:

[0019] The main body is connected to the housing and seals the first opening; the main body is thermally connected to the battery module and the power conversion module respectively.

[0020] Multiple heat sinks are disposed on the side of the body away from the first opening and are all connected to the body, with the multiple heat sinks spaced apart.

[0021] In some embodiments, the first heat dissipation component further includes a heat-conducting part connected to the side of the body away from the heat sink and thermally connected to the battery module.

[0022] In some embodiments,

[0023] The housing has a second opening, which is positioned opposite to the first opening.

[0024] The energy storage device also includes a cover plate, which is connected to the housing and seals the second opening. The cover plate is thermally connected to the battery module.

[0025] In some embodiments, the energy storage device further includes a first heat-conducting element disposed between the battery module and the cover plate, and abutting against the battery module and the cover plate respectively.

[0026] In some embodiments,

[0027] The box also has a third opening, which is located on one side of the box along a first direction, and the first opening is located on one side of the box along a second direction.

[0028] The energy storage device further includes a second heat dissipation component, which is connected to the housing and covers the third opening, and is thermally connected to the battery module.

[0029] The first direction intersects with the second direction.

[0030] In some embodiments, the second heat dissipation component includes:

[0031] A fixing part is provided on the outside of the box body and connected to the box body;

[0032] A heat dissipation part is connected to the fixing part and at least partially passes through the third opening. The heat dissipation part is thermally connected to the battery module.

[0033] In some embodiments, the energy storage device further includes a second heat-conducting element disposed between the battery module and the heat dissipation section, and abutting against the battery module and the heat dissipation section respectively.

[0034] In some embodiments, the fixing part is detachably connected to the housing.

[0035] In some embodiments, the energy storage device further includes a third heat-conducting element disposed between the battery module and the first heat dissipation component, and abutting against the battery module and the first heat dissipation component respectively.

[0036] In some embodiments, the first heat dissipation component is detachably connected to the housing.

[0037] Accordingly, the energy storage system described in this application includes the energy storage device as described in any of the foregoing embodiments.

[0038] Beneficial Effects: Compared with the prior art, an energy storage device according to an embodiment of this application includes a housing, a battery module, a power conversion module, and a first heat dissipation component. The housing has a first opening, and both the battery module and the power conversion module are disposed inside the housing. The first heat dissipation component is connected to the housing and seals the first opening. The first heat dissipation component is thermally connected to both the battery module and the power conversion module. By setting both the power conversion module and the battery module to be thermally connected to the first heat dissipation component simultaneously, and allowing the power conversion module and the battery module to share the same heat dissipation component, this application can improve both space utilization and the overall heat dissipation efficiency of the energy storage device.

[0039] Compared with the prior art, an energy storage system according to an embodiment of this application includes the energy storage device as described in any of the foregoing embodiments. It is understood that the energy storage system of this application includes all the technical features and effects of the aforementioned energy storage devices, which will not be repeated here. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure of an energy storage device according to an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the structure of the first heat dissipation component of an energy storage device according to an embodiment of this application bursting open;

[0043] Figure 3 This is a cross-sectional view of an energy storage device according to an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the structure of an energy storage device according to an embodiment of this application after removing the cover plate;

[0045] Figure 5 This is a schematic diagram of the structure of the second heat dissipation component of an energy storage device according to an embodiment of this application;

[0046] Figure 6 This is a schematic diagram of the connection between the first heat dissipation component and the power conversion module of an energy storage device according to an embodiment of this application;

[0047] Figure 7 This is a cross-sectional view of the connection between the first heat dissipation component and the power conversion module of an energy storage device according to an embodiment of this application;

[0048] Figure 8 This is a schematic diagram of the structure of one embodiment of the heat insulation cover of an energy storage device according to an embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100. Box body; 110. First opening; 120. Second opening; 130. Third opening;

[0051] 200. Battery module;

[0052] 300. Power conversion module; 310. Heat insulation cover; 311. Heat insulation space; 312. Cover body; 313. Heat-conducting wall; 320. Power conversion circuit; 330. Insulation layer;

[0053] 400, First heat dissipation component; 410, Body; 420, Heat sink; 430, Heat-conducting part;

[0054] 500, cover plate;

[0055] 600. First heat-conducting component;

[0056] 700. Second heat dissipation component; 710. Fixing part; 720. Heat dissipation part;

[0057] 800. Second heat-conducting component;

[0058] 900. Third heat-conducting component;

[0059] X, the first direction; Y, the second direction. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0061] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0062] It should also be noted that in the accompanying drawings of this application, arrows labeled X indicate the first direction X, and arrows labeled Y indicate the second direction Y. In the embodiments of this application, the first direction X is the direction in which the first opening 110 and the second opening 120 are arranged opposite each other, and it is also the thickness direction of the energy storage device; the second direction Y is the height direction of the energy storage device; the first direction X and the second direction Y are introduced to facilitate the description of the structural positional relationship of the components of the energy storage device, thereby facilitating the understanding of its structure. In the embodiments of this application, the first direction X and the second direction Y are preferably perpendicular to each other.

[0063] With the continuous increase in global household photovoltaic penetration, the demand for supporting energy storage systems has surged. Energy storage systems with power conversion equipment (specifically, DC-DC converters) can achieve more efficient photovoltaic-storage synergy. However, power conversion equipment and batteries are relatively heat-generating components. Excessive heat generation inside the enclosure may lead to derating of the components and affect the overall system efficiency.

[0064] In view of this, embodiments of this application provide an energy storage device and an energy storage system, which aim to solve the above problems.

[0065] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This application provides an energy storage device, including a housing 100, a battery module 200, a power conversion module 300, and a first heat dissipation component 400. The housing 100 has a first opening 110. The battery module 200 and the power conversion module 300 are both disposed inside the housing 100. The first heat dissipation component 400 is connected to the housing 100 and covers the first opening 110. The first heat dissipation component 400 is thermally connected to the battery module 200 and the power conversion module 300, respectively.

[0066] In this embodiment, by setting the power conversion module 300 and the battery module 200 to be thermally connected to the first heat dissipation component 400, the power conversion module 300 and the battery module 200 share the heat dissipation of the first heat dissipation component 400, which can improve space utilization and the overall heat dissipation efficiency of the energy storage device.

[0067] Specifically, in the energy storage device of this application embodiment, both the power conversion module 300 and the battery module 200 are devices that generate a lot of heat. High temperatures can easily lead to device derating, affecting the overall system efficiency. Therefore, this application achieves coordinated heat dissipation for the two major heat sources by setting a first heat dissipation component 400 that is thermally connected to both the battery module 200 and the power conversion module 300. Compared to traditional independent heat dissipation methods, the first heat dissipation component 400 directly dissipates heat to the outside, allowing heat to be conducted to the outside more quickly, reducing the temperature of the battery module 200 and the power conversion module 300, minimizing performance degradation and shortened lifespan caused by high temperatures, ensuring that the devices operate within a suitable temperature range, and significantly improving the stability and reliability of the system. At the same time, the battery module 200 and the power conversion module 300 share a heat dissipation component, allowing for a more compact arrangement of the various components within the limited space of the enclosure 100, reducing the overall size of the energy storage device, meeting the space efficiency requirements of home photovoltaic energy storage, and facilitating installation and use. Furthermore, by sharing a heat dissipation component between the battery module 200 and the power conversion module 300, this application effectively reduces the number and complexity of the 720 heat dissipation components, thereby lowering material and processing costs. Simultaneously, the simplified heat dissipation structure also reduces the difficulty and cost of subsequent maintenance and repair.

[0068] like Figure 3 As shown, in some embodiments, the battery module 200 and the power conversion module 300 are spaced apart.

[0069] In this embodiment, by setting the battery module 200 and the power conversion module 300 apart, physical isolation between them can be achieved. This reduces the transfer of high heat generated by the power conversion module 300 during operation to the battery module 200, thereby improving the safety of the energy storage device and reducing the risk of thermal runaway. Simultaneously, the spacing between the battery module 200 and the power conversion module 300 facilitates the replacement and maintenance of the power conversion equipment, improving maintenance convenience.

[0070] Additionally, it should be noted that in this embodiment, by setting the battery module 200 and the power conversion module 300 to be spaced apart and both connected to the first heat dissipation component 400, it is more conducive for the first heat dissipation component 400 to dissipate the heat generated by the battery module 200 and the power conversion module 300, thus avoiding mutual interference between the battery module 200 and the power conversion module 300 when they are dissipating heat through the first heat dissipation component 400.

[0071] like Figure 7 As shown, in some embodiments, the power conversion module 300 includes a heat insulation cover 310, a power conversion circuit 320, and a heat insulation layer 330. The heat insulation cover 310 is connected to the first heat dissipation component 400, and the power conversion circuit 320 is disposed inside the heat insulation cover 310 and is thermally connected to the first heat dissipation component 400. The heat insulation layer 330 is attached to the inner sidewall of the heat insulation cover 310 and is partially located between the heat insulation cover 310 and the power conversion circuit 320.

[0072] In this embodiment, the power conversion module 300 can isolate the heat generated by the operation of the power conversion circuit 320 by setting a heat insulation cover 310 and a heat insulation layer 330, and dissipate heat through the first heat dissipation component 400. At this time, the heat generated by the power conversion circuit 320 can be isolated from the battery module 200, effectively improving the safety of the energy storage device.

[0073] Specifically, by setting up a heat insulation cover 310 and a thermal insulation layer 330, the power conversion circuit 320 is effectively thermally isolated. This reduces thermal interference between the power conversion module 300 and the battery module 200, protecting the safety of the battery module 200. Furthermore, the power conversion module 300 of this application, by setting up an efficient heat conduction path for the first heat dissipation component 400 of the power conversion circuit 320, and utilizing the thermal insulation effect of the heat insulation cover 310 and the thermal insulation layer 330, achieves efficient direct heat transfer from the power conversion circuit 320 to the first heat dissipation component 400. Compared to the heat diffusion into the housing 100 and then heat dissipation in a transmission scheme, this improves the heat dissipation efficiency of the power conversion circuit 320.

[0074] In this embodiment, the heat insulation cover 310 can also be fixedly connected to the power conversion circuit 320. In this case, the power conversion circuit 320 can be connected to the heat insulation cover 310 and the first heat dissipation component 400 respectively to fix the power conversion circuit 320, which is beneficial to maintaining structural stability and heat transfer.

[0075] Furthermore, the insulation layer 330 can be attached to the inner wall of the heat insulation cover 310, which can achieve the heat insulation effect and ensure that there is enough space inside the heat insulation cover 310 to accommodate the power conversion circuit 320.

[0076] It should be noted that the power conversion circuit 320 of this application may include a power conversion circuit 320 board, on which multiple electronic components with high heat dissipation are integrated.

[0077] like Figure 7 As shown, in some embodiments, the heat shield 310 is sealed to the first heat dissipation component 400 to form a closed heat insulation space 311; the power conversion circuit 320 is disposed in the heat insulation space 311 and is thermally connected to the first heat dissipation component 400; the first heat dissipation component 400 is detachably connected to the housing 100.

[0078] In this embodiment, after the heat shield 310 and the first heat dissipation component 400 form a sealed heat-insulating space 311, the power conversion circuit 320 generates heat within the heat-insulating space 311. At this time, the heat diffuses within the heat-insulating space 311 without spreading to the outside of the heat shield 310. Simultaneously, the first heat dissipation component 400 dissipates the heat generated by the power conversion circuit 320, achieving effective heat dissipation within the heat-insulating space 311 and the power conversion circuit. Therefore, the sealed heat-insulating space 311 effectively prevents the heat generated by the power conversion circuit 320 from being transferred to the battery module, and the first heat dissipation component 400 enables directional and rapid heat dissipation and cooling.

[0079] In some embodiments, the first heat dissipation component 400 is detachably connected to the housing 100.

[0080] In this embodiment, the first heat dissipation component 400 is detachably connected to the limiting body, which allows the first opening 110 to be opened, facilitating the replacement and maintenance of the power conversion module 300.

[0081] like Figure 7 As shown, the power conversion module 300 can be connected to the first heat dissipation component 400 but not to the housing 100. In this case, the power conversion module 300 can be removed from the housing 100 at the same time as the first heat dissipation component 400 is removed, making it easier to disassemble and maintain the power conversion module 300. Since the top cover does not need to be removed, the maintainability and ease of maintenance of the energy storage device are improved.

[0082] Understandably, the first heat dissipation component 400 faces outwards to dissipate heat into the environment, and there is no other fixation around it. Compared with the cover plate 500 being connected to other equipment, it is easier to remove the first heat dissipation component 400, thus improving maintenance convenience.

[0083] like Figure 8 As shown, in some embodiments, the heat insulation cover 310 has a closed heat insulation space 311. The heat insulation cover 310 includes a cover body 312 and a heat-conducting wall 313. The heat-conducting wall 313 is connected to the cover body 312 to form the heat insulation space 311. The heat-conducting wall 313 is thermally connected to the first heat dissipation component 400. The power conversion circuit 320 is disposed in the heat insulation space 311 and is thermally connected to the heat-conducting wall 313. The heat insulation layer 330 is attached to the inner sidewall of the cover body 312.

[0084] In this embodiment, the heat insulation cover 310 may also have its own enclosed heat insulation space 311. In this case, the heat insulation cover 310 may include two parts: a cover body 312 and a heat-conducting wall 313. The cover body 312 and the heat-conducting wall 313 are connected to form a sealed heat insulation space 311. The power conversion circuit 320 is disposed within the heat insulation space 311 to prevent the heat from the power conversion circuit 320 from diffusing into the housing 100. At the same time, the heat-conducting wall 313 is connected to the first heat dissipation component 400, thereby enabling the heat in the heat insulation space 311 to be quickly diffused out through the first heat dissipation component 400, achieving rapid heat dissipation and cooling, and ensuring the normal operation of the power conversion circuit 320.

[0085] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the housing 100 has a second opening 120, which is disposed opposite to the first opening 110; the energy storage device further includes a cover plate 500, which is connected to the housing 100 and covers the second opening 120, and the cover plate 500 is thermally connected to the battery module 200.

[0086] In this embodiment, the second opening 120 is positioned opposite to the first opening 110, and the cover plate 500 is thermally connected to the battery module 200, thereby achieving double-sided heat dissipation on both sides of the battery module 200, which effectively improves the heat dissipation efficiency of the battery module 200 and helps to improve the safety of the energy storage device.

[0087] It should be noted that the cover plate 500 in this application can be a conventional aluminum alloy plate or a plate with a high heat dissipation rate. Of course, the cover plate 500 can also be replaced with a heat dissipation plate similar to the first heat dissipation component 400, in order to improve the heat dissipation efficiency of the energy storage device.

[0088] It should be noted that the first opening 110 and the second opening 120 in this embodiment are both large openings, which facilitates the disassembly and replacement of the battery module 200 and the power conversion module 300.

[0089] like Figure 3 As shown, in some embodiments, the energy storage device further includes a first heat-conducting element 600, which is disposed between the battery module 200 and the cover plate 500, and abuts against the battery module 200 and the cover plate 500 respectively.

[0090] In this embodiment, by providing the first heat-conducting element 600, the heat from the battery module 200 can be transferred to the cover plate 500 more quickly and efficiently, thereby improving heat dissipation efficiency.

[0091] It should be noted that the first thermal conductive element 600 of this application can be a deformable thermal conductive medium, such as thermally conductive silicone. In this case, the first thermal conductive element 600 is attached to the surface of the battery module 200 and the cover plate 500 by means of pasting or coating. At the same time, the first thermal conductive element 600 abuts against the cover plate 500 and the battery module 200 respectively, so that the first thermal conductive element 600 can have full contact with the cover plate 500 and the battery module 200 respectively, thereby ensuring that the first thermal conductive element 600 has high thermal conductivity and realizing rapid heat dissipation of the battery module 200 by the cover plate 500.

[0092] Please refer to the following: Figure 3 and Figure 4 In some embodiments, the housing 100 further has a third opening 130, which penetrates the housing 100 along a first direction X, and the first opening 110 penetrates the housing 100 along a second direction Y; the energy storage device further includes a second heat dissipation component 700, which is connected to the housing 100 and covers the third opening 130, and is thermally connected to the battery module 200; the first direction X intersects the second direction Y.

[0093] In this embodiment of the application, by providing a third opening 130 on the housing 100 and a second heat dissipation component 700 in the third opening 130, effective heat dissipation can be achieved on the other side of the battery module 200, further improving the heat dissipation efficiency of the energy storage device and further improving the safety of the energy storage device.

[0094] It should be noted that, in this embodiment of the application, the second heat dissipation component 700, the first heat dissipation component 400 and the cover plate 500 cooperate with each other to achieve effective heat dissipation on three sides of the battery module 200, which greatly improves the heat dissipation efficiency of the battery module 200, and thus improves the safety of the energy storage device during use.

[0095] It should be noted that the thermally conductive connection mentioned in the embodiments of this application can be a direct contact connection or an indirect contact connection. Specifically, a direct contact connection can be between the second heat dissipation component 700 and the battery module 200, between the first heat dissipation component 400 and both the battery module 200 and the power conversion module 300, or between the cover plate 500 and the battery module 200. Indirect contact connection can be achieved by placing a thermally conductive medium between the heat dissipation part 720 and the heat-generating component, using the thermally conductive medium to transfer the heat generated by the heat-generating component to the heat dissipation part 720 for heat dissipation.

[0096] Please refer to the following: Figure 3 and Figure 5 In some embodiments, the second heat dissipation component 700 includes a fixing part 710 and a heat dissipation part 720. The fixing part 710 is disposed on the outside of the housing 100 and is detachably connected to the housing 100. The heat dissipation part 720 is connected to the fixing part 710 and at least partially passes through the third opening 130. The heat dissipation part 720 is thermally connected to the battery module 200.

[0097] In this embodiment, the fixing part 710 is used for fixed connection with the housing 100, and the heat dissipation part 720 is used for thermally conductive connection with the battery module 200. This achieves effective heat dissipation from the bottom of the battery module 200.

[0098] It should be noted that the fixing part 710 in this embodiment can be detachably connected to the housing 100. In this case, the second heat dissipation component 700 can be detached, and the appropriate second heat dissipation component 700 can be replaced according to the specific fixing position of the battery module 200.

[0099] like Figure 3As shown, in some embodiments, the energy storage device further includes a second heat-conducting element 800, which is disposed between the battery module 200 and the heat dissipation part 720, and abuts against the battery module 200 and the heat dissipation part 720 respectively.

[0100] In this embodiment, by providing a second heat-conducting component 800, it can effectively fit and abut against the battery module 200 and the heat dissipation part 720, thereby improving the heat transfer efficiency from the battery module 200 to the heat dissipation part 720, and further improving the heat dissipation efficiency of the second heat dissipation component 700.

[0101] In some embodiments, the fixing part 710 is detachably connected to the housing 100.

[0102] In this embodiment, by providing a detachable connection between the fixing part 710 and the housing 100, the installation and removal of the second heat dissipation component 700 and the energy storage device housing 100 can be achieved. Specifically, if the second heat-conducting element 800 fails to make contact with the battery module 200 and the heat dissipation part 720, a second heat-conducting element 800 of appropriate thickness can be promptly replaced, thereby ensuring that a suitable second heat-conducting element 800 can guarantee heat conduction efficiency and the heat dissipation efficiency of the second heat dissipation component 700.

[0103] Please refer to the following: Figure 3 and Figure 6 In some embodiments, the first heat dissipation assembly 400 includes a body 410 and a plurality of heat dissipation components 420. The body 410 is connected to the housing 100 and covers the first opening 110. The body 410 is thermally connected to the battery module 200 and the power conversion module 300 respectively. The plurality of heat dissipation components 420 are disposed on the side of the body 410 away from the first opening 110 and are all connected to the body 410. The plurality of heat dissipation components 420 are spaced apart.

[0104] In this embodiment, the body 410 is used to connect to the housing 100 and to transfer heat between the power conversion module 300 and the battery module 200. Multiple heat sinks 420 can be connected to the body 410, increasing the heat dissipation area and thus improving heat dissipation efficiency. This structure of the first heat dissipation assembly 400 can simultaneously dissipate heat for both the power conversion module 300 and the battery module 200, ensuring high heat dissipation efficiency. The spaced arrangement of the multiple heat sinks 420 provides heat dissipation space for each heat sink 420, thereby ensuring heat dissipation efficiency.

[0105] It should be noted that the heat sink 420 in this embodiment can be perpendicular to the body 410 or have a certain angle with the body 410, and can be flexibly set according to space requirements and heat dissipation requirements.

[0106] It should also be noted that in this embodiment, the battery module is thermally connected to the cover plate 500 on one side and to the first heat dissipation assembly 400 on the other side. The first heat dissipation assembly 400 is provided with multiple heat dissipation elements 420, which can be heat dissipation fins. Since the heat dissipation area of ​​the multiple heat dissipation elements 420 is much larger than that of the cover plate 500, the heat dissipation efficiency of the first heat dissipation assembly 400 is higher than that of the cover plate 500. In this case, there may be uneven heat dissipation on both sides of the battery module, which may damage the performance of the battery module. In this application, both the power conversion module and the battery module are connected to the first heat dissipation assembly 400, and the first heat dissipation assembly 400 dissipates and cools both the power conversion module and the battery module simultaneously. Since the power conversion module generates a lot of heat during operation, the heat from the power conversion module can be used to distribute the heat dissipation capacity of the first heat dissipation assembly 400, thus achieving a balanced heat dissipation effect on both sides of the battery module, thereby maintaining the performance and safety of the battery module.

[0107] Please refer to the following: Figure 3 and Figure 6 In some embodiments, the first heat dissipation component 400 further includes a heat-conducting part 430, which is connected to the side of the body 410 away from the heat sink 420 and is thermally connected to the battery module 200.

[0108] In this embodiment, the heat-conducting part 430 is used to make a heat-conducting connection with the battery module 200 and transfer the heat transferred by the battery module 200 to the body 410, thereby ensuring the heat dissipation efficiency of the first heat dissipation component 400 for the battery module 200.

[0109] Specifically, since the battery module 200 is located inside the housing 100 and needs to be fixedly connected to the housing 100, and since the size of the battery module 200 may vary, there may be a large gap between the corresponding battery module 200 and the main body 410. In this case, the heat-conducting part 430 is designed to partially extend into the housing 100, thereby reducing the gap between the battery module 200 and the first heat dissipation component 400. The battery module 200 and the heat-conducting part 430 can be directly contacted for heat conduction or indirectly contacted for heat conduction. Indirect contact can be achieved by setting a heat-conducting medium between the battery module 200 and the heat-conducting part 430 for heat conduction.

[0110] like Figure 3 As shown, in some embodiments, the energy storage device further includes a third heat-conducting element 900, which is disposed between the battery module 200 and the first heat dissipation component 400, and abuts against the battery module 200 and the first heat dissipation component 400 respectively.

[0111] In this embodiment of the application, by setting a third heat-conducting element 900 and making the third heat-conducting element 900 abut against the battery module 200 and the first heat dissipation component 400 respectively, the heat of the battery module 200 can be quickly transferred to the first heat dissipation component 400 by the third heat-conducting element 900, thereby achieving efficient heat dissipation of the battery module 200 by the first heat dissipation component 400.

[0112] It should be noted that the first heat-conducting component 600, the second heat-conducting component 800, and the third heat-conducting component 900 can all be flexible heat-conducting media such as thermally conductive silicone. They are connected and locked to the housing 100 through the first heat dissipation component 400, the second heat dissipation component 700, and the cover plate 500, thereby compressing the corresponding heat-conducting components and ensuring that the heat-conducting components are in contact with the battery module 200 and the corresponding heat dissipation part 720, achieving efficient heat conduction and utilizing the battery module 200 to quickly dissipate heat.

[0113] This application also provides an energy storage system, including the energy storage device as described in any of the foregoing embodiments.

[0114] It is understood that the energy storage system of this application includes all the technical features and effects of the aforementioned energy storage device, which will not be repeated here.

[0115] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0116] The above provides a detailed description of an energy storage device and system provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage device, characterized by, include: The box (100) has a first opening (110); The battery module (200) and the power conversion module (300) are both housed within the enclosure (100); The first heat dissipation component (400) is connected to the housing (100) and covers the first opening (110); the first heat dissipation component (400) is thermally connected to the battery module (200) and the power conversion module (300) respectively.

2. The energy storage device according to claim 1, characterized in that, The battery module (200) and the power conversion module (300) are spaced apart; the power conversion module (300) includes: Heat shield (310); A power conversion circuit (320) is disposed inside the heat insulation cover (310), and the power conversion circuit (320) is thermally connected to the first heat dissipation component (400); The insulation layer (330) is attached to the inner wall of the heat insulation cover (310).

3. The energy storage device according to claim 2, characterized in that, The heat insulation cover (310) is sealed to the first heat dissipation component (400) to form a closed heat insulation space (311); The power conversion circuit (320) is disposed in the heat insulation space (311) and is thermally connected to the first heat dissipation component (400); The first heat dissipation component (400) is detachably connected to the housing (100).

4. The energy storage device according to claim 2, characterized in that, The heat insulation cover (310) has a closed heat insulation space (311). The heat insulation cover (310) includes a cover body (312) and a heat-conducting wall (313). The heat-conducting wall (313) is connected to the cover body (312) to form the heat insulation space (311). The heat-conducting wall (313) is thermally connected to the first heat dissipation component (400). The power conversion circuit (320) is disposed in the heat insulation space (311) and is thermally connected to the heat-conducting wall (313); The insulation layer (330) is attached to the inner wall of the cover (312).

5. The energy storage device of claim 1, wherein, The first heat dissipation component (400) includes: The main body (410) is connected to the housing (100) and covers the first opening (110); the main body (410) is thermally connected to the battery module (200) and the power conversion module (300) respectively; Multiple heat sinks (420) are disposed on the side of the body (410) away from the first opening (110) and are all connected to the body (410). The multiple heat sinks (420) are spaced apart.

6. The energy storage device of claim 5, wherein, The first heat dissipation component (400) further includes a heat-conducting part (430), which is connected to the side of the body (410) away from the heat sink (420) and is thermally connected to the battery module (200).

7. The energy storage device according to claim 1, characterized in that, The housing (100) has a second opening (120), which is disposed opposite to the first opening (110); The energy storage device also includes a cover plate (500), which is connected to the housing (100) and covers the second opening (120). The cover plate (500) is thermally connected to the battery module (200).

8. The energy storage device of claim 7, wherein, The energy storage device further includes a first heat-conducting component (600), which is disposed between the battery module (200) and the cover plate (500) and abuts against the battery module (200) and the cover plate (500) respectively.

9. The energy storage device according to claim 1, characterized in that, The box (100) also has a third opening (130), which is located on one side of the box (100) along the first direction (X), and the first opening (110) is located on one side of the box (100) along the second direction (Y). The energy storage device further includes a second heat dissipation component (700), which is connected to the housing (100) and covers the third opening (130). The second heat dissipation component (700) is thermally connected to the battery module (200). The first direction (X) intersects with the second direction (Y).

10. The energy storage device of claim 9, wherein, The second heat dissipation component (700) includes: A fixing part (710) is provided on the outside of the housing (100) and is detachably connected to the housing (100); The heat dissipation part (720) is connected to the fixing part (710) and at least partially passes through the third opening (130). The heat dissipation part (720) is thermally connected to the battery module (200).

11. The energy storage device of claim 10, wherein, The energy storage device further includes a second heat-conducting component (800), which is disposed between the battery module (200) and the heat dissipation part (720) and abuts against the battery module (200) and the heat dissipation part (720) respectively.

12. The energy storage device of claim 1, wherein, The energy storage device further includes a third heat-conducting component (900), which is disposed between the battery module (200) and the first heat dissipation component (400) and abuts against the battery module (200) and the first heat dissipation component (400) respectively.

13. The energy storage device of claim 1, wherein, The first heat dissipation component (400) is detachably connected to the housing (100).

14. An energy storage system characterized by, Includes the energy storage device as described in any one of claims 1 to 13.

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