Energy storage device

Abstract

The embodiment of the utility model provides an energy storage device, and relates to the technical field of energy storage. The energy storage device comprises a battery assembly and a first heat dissipation piece, the battery assembly comprises a supporting piece and at least two battery packs, and the supporting piece comprises a containing cavity; the at least two battery packs are arranged in the accommodating cavity at intervals; a heating piece is arranged at the bottom of each battery pack; the first heat dissipation piece is arranged in the containing cavity and located between the adjacent battery packs. According to the embodiment of the invention, the battery pack can better adapt to the external environment, so that the optimal performance of the battery pack can be realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of energy storage, and in particular, to an energy storage device. Background Art

[0002] With the continuous expansion of the scale of the mobile electronic product market, the demand for portable energy storage products, such as household energy storage devices, has gradually increased. Among them, a household energy storage device is used to store electric energy and can be carried to environments without grid radiation, such as the suburbs or outdoor travel sites, etc., and can provide power for common household appliances such as rice cookers, induction cookers, or electric grills, etc., and can also be used for emergency needs such as outdoor camping lighting.

[0003] The use of battery packs in household energy storage devices has strict requirements for capacity, safety, and lifespan. Both overcooling and overheating will affect the battery cycle life. Therefore, it is necessary to strictly control to ensure the operating temperature of the battery. However, current household energy storage devices cannot better adapt to the external environment, and thus cannot better exert the optimal performance of the battery pack. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide an energy storage device that can better adapt to the external environment, thereby ensuring that the battery pack can exert its optimal performance.

[0005] To achieve the above object, the embodiments of the present application provide the following technical solutions:

[0006] The embodiments of the present application provide an energy storage device, which includes:

[0007] A battery assembly, the battery assembly includes a support member and at least two battery packs, the support member includes a receiving cavity; at least two of the battery packs are spaced apart and disposed in the receiving cavity; a heating member is disposed at the bottom of each battery pack;

[0008] A first heat dissipation member, the first heat dissipation member is disposed in the receiving cavity and located between adjacent battery packs.

[0009] In a possible implementation manner, the support member includes a first support plate and a second support plate disposed opposite to each other in a first direction; the first support plate and the second support plate enclose a receiving cavity;

[0010] At least two of the battery packs are spaced apart and disposed in the receiving cavity in a second direction; the second direction intersects the first direction.

[0011] In a possible implementation manner, an air inlet is disposed on one of the first support plate and the second support plate, and an air outlet is disposed on one of the first support plate and the second support plate;

[0012] The first heat dissipation component is disposed on the support plate where the air outlet is located and covers the air outlet.

[0013] In a possible implementation manner, the air outlet is disposed on the first support plate, and the number of the air outlets is multiple;

[0014] The multiple air outlets are arranged in multiple columns on the first support plate.

[0015] In a possible implementation manner, the number of the battery assemblies is two, and one of the battery assemblies is disposed on the other battery assembly.

[0016] In a possible implementation manner, a second heat dissipation component is further included. The second heat dissipation component is disposed on opposite sides of the battery pack in the second direction and is connected to the battery pack.

[0017] In a possible implementation manner, the battery pack includes a box body and a battery module;

[0018] The box body includes an installation cavity that penetrates the box body along the second direction; the battery module is installed in the installation cavity;

[0019] The second heat dissipation component is installed in the installation cavity and covers an opening of the installation cavity in the second direction.

[0020] In a possible implementation manner, the battery module is fixed in the installation cavity through a fixing frame.

[0021] In a possible implementation manner, the battery module includes a plurality of battery cell monomers, and the plurality of battery cell monomers are arranged along the first direction;

[0022] The heating component is disposed at the bottom of the plurality of battery cell monomers;

[0023] The sides of the plurality of battery cell monomers in the second direction are connected to the second heat dissipation component through heat conduction pads.

[0024] In a possible implementation manner, the energy storage device further includes a support base; the battery assembly is disposed on the support base.

[0025] In the energy storage device provided by the embodiment of the present application, both a heating component and a first heat dissipation component are included. When the battery pack is overheated, the first heat dissipation component can be used for heat dissipation, so that the heat generated during the charging and discharging process of the battery pack is timely diffused to the external environment, avoiding heat accumulation in the battery pack and improving the safety of the battery pack. When the energy storage device is in a cold environment, the heating component can heat the battery assembly, so that the energy storage device can also operate at a lower temperature, thereby exerting the optimal performance of the battery pack.

[0026] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by the energy storage device provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manners. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 Structural schematic diagram of the energy storage device provided by the embodiments of the present application;

[0029] Figure 2 Partial structural schematic of the energy storage device provided by the embodiments of the present application Figure 1 ;

[0030] Figure 3 Partial structural schematic of the energy storage device provided by the embodiments of the present application Figure 2 ;

[0031] Figure 4 Distribution diagram of the air outlet provided by the embodiments of the present application;

[0032] Figure 5 Schematic diagram of the first heat dissipation member provided by the embodiments of the present application;

[0033] Figure 6 Explosion schematic diagram of the battery pack provided by the embodiments of the present application;

[0034] Figure 7 Schematic of the battery module provided by the embodiments of the present application Figure 1 ;

[0035] Figure 8 Schematic of the battery module provided by the embodiments of the present application Figure 2 ;

[0036] Figure 9 Schematic of the battery module provided for the embodiments of the application Figure 3 。

[0037] Description of the reference numerals:

[0038] 100: Support member; 110: First support plate; 120: Second support plate; 130: Accommodation cavity; 140: Air outlet;

[0039] 200: Battery pack; 210: Box body; 211: Installation cavity; 220: Battery module; 230: Fixing frame; 231: First fixing frame; 232: Second fixing frame; 233: Connecting beam; 240: Connecting plate; 250: Single battery cell; 260: Bottom plate; 270: Cover plate; 280: Battery management module; 290: Packing belt;

[0040] 300: Heating element;

[0041] 400: First heat dissipation member; 410: Housing; 420: Fan blade; 430: Mounting hole;

[0042] 500: Second heat dissipation member;

[0043] 600: Thermal conductive pad;

[0044] 700: Gel sheet;

[0045] 800: Insulating sheet;

[0046] 900: Support base. Detailed implementation manners

[0047] As described in the background art, the energy storage device in the related art cannot better adapt to the external environment, and thus cannot better exert the optimal performance of the battery pack. Through research by the inventor, it is found that the reason for this problem is that the current management of the battery pack basically focuses on how to cool the battery pack, ignoring the fact that when the energy storage device is in a low-temperature environment, the optimal performance of the battery pack cannot be exerted.

[0048] In view of the above technical problems, the embodiment of the present application provides an energy storage device, which includes both a heating element and a first heat dissipation member at the same time. When the battery pack is overheated, the first heat dissipation member can be used for heat dissipation, so that the heat generated during the charging and discharging process of the battery pack can be timely diffused to the external environment, avoiding the accumulation of heat in the battery pack and improving the safety of the battery pack. When the energy storage device is in a cold environment, the heating element can heat the battery assembly, so that the energy storage device can also operate at a lower temperature, thereby exerting the optimal performance of the battery pack.

[0049] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0050] The embodiment of the present application provides an energy storage device, which is used to supply power to electrical equipment. Among them, the energy storage device has small size and portability, and can be used in environments without power grid radiation, such as suburbs or outdoor travel locations.

[0051] Please refer to the attached Figure 1 and the attached Figure 2 . The energy storage device includes a battery assembly, and the battery assembly includes a support member 100 and at least two battery packs 200. Among them, the support member 100 serves as a support component for supporting at least two battery packs 200. For example, the support member 100 includes a receiving cavity 130, and at least two battery packs 200 are arranged in the receiving cavity 130. It should be noted that in this embodiment, the receiving cavity 130 can be defined by two support plates or four support plates.

[0052] Exemplarily, please refer to the attached Figure 2 . The support member 100 includes a first support plate 110 and a second support plate 120. The first support plate 110 and the second support plate 120 are arranged at intervals along a first direction. A receiving cavity 130 is enclosed between the first support plate 110 and the second support plate 120. Among them, the first direction can be the Y direction in the attached Figure 2 .

[0053] At least two battery packs 200 are arranged at intervals in the receiving cavity 130; a heating element 300 is arranged at the bottom of each battery pack 200. For example, at least two battery packs 200 are arranged at intervals in the receiving cavity 130 along a second direction. The second direction intersects the first direction, and the second direction can be the X direction in the attached Figure 2 . In this embodiment, at least two battery packs 200 can include two, three, four or even more. Exemplarily, at least two battery packs 200 include three, and there is a gap between adjacent battery packs 200.

[0054] The energy storage device further includes a first heat dissipation member 400, and the first heat dissipation member 400 is arranged in the receiving cavity 130 and is located between adjacent battery packs 200. In this embodiment, the first heat dissipation member 400 can include a cooling fan. Please refer to the attached Figure 5, the first heat dissipation component 400 may include a housing 410 and a fan blade 420 disposed within the housing 410. Among them, the housing 410 is usually made of plastic or metal and is used to support and protect the fan blade 420 or other components. In addition, mounting holes 430 are provided on the housing 410, and the first heat dissipation component 400 can be mounted to the support plate through bolts. For example, the first heat dissipation component 400 is mounted to the first support plate 110. In addition, the size of the first heat dissipation component 400 is 50mm * 50mm * 15mm, and the air volume is 0.28m 3 / min.

[0055] The energy storage device provided by the embodiment of the present application includes both a heating component 300 and a first heat dissipation component 400; when the battery pack overheats, the first heat dissipation component 400 can be used for heat dissipation, so that the heat generated during the charging and discharging process of the battery pack is timely diffused into the external environment, avoiding the accumulation of heat in the battery pack and improving the safety of the battery pack. When the energy storage device is in a cold environment, the heating component 300 can heat the battery assembly, enabling the energy storage device to operate even at a lower temperature, thereby exerting the optimal performance of the battery pack.

[0056] In a possible implementation manner, an air inlet (not shown in the figure) is provided on one of the first support plate 110 and the second support plate 120, and an air outlet 140 is provided on one of the first support plate 110 and the second support plate 120. In one example, the air inlet is provided on the first support plate 110, and correspondingly, the air outlet 140 is provided on the second support plate 120. In another example, the air inlet is provided on the second support plate 120, and correspondingly, the air outlet 140 is provided on the second support plate 120.

[0057] The first heat dissipation component 400 is disposed on the support plate where the air outlet 140 is located and covers the air outlet 140. In this example, the air inlet and the air outlet 140 are oppositely arranged, which can achieve effective air circulation, contribute to improving the internal heat dissipation efficiency of the energy storage device, and ensure that the energy storage device maintains an appropriate temperature during operation. In addition, by respectively providing the air inlet and the air outlet 140 on different support plates, the internal structure design of the energy storage device can be simplified, the interference of internal components can be reduced, and the overall stability and reliability of the energy storage device can be improved.

[0058] In a possible implementation manner, the air outlet 140 is provided on the first support plate 110, and the number of the air outlets 140 is multiple; the multiple air outlets 140 are arranged in multiple columns on the first support plate 110. The design of the multiple air outlets 140 can significantly increase the air circulation area, enabling the hot air to be discharged outside the energy storage device more quickly and evenly, improving the heat dissipation efficiency, and ensuring that the energy storage device maintains an appropriate temperature during high-load operation.

[0059] Among them, there are multiple options for the arrangement of the plurality of air outlets 140. In one example, along the length direction of the first support plate 110, the number of air outlets in each column first increases and then decreases. In another example, the number of air outlets 140 in two adjacent columns may be equal or unequal; for example, the plurality of air outlets 140 are arranged in seven columns, wherein the plurality of air outlets 140 are symmetrically arranged with respect to the fourth column, and among them, the number of air outlets 140 in the first column and the second column are equal, both being one, the number of air outlets 140 in the third column is two, and the number of air outlets 140 in the fourth column is three.

[0060] In one possible implementation, the number of battery modules is two, and one battery module is disposed on top of the other. That is to say, the two battery modules are stacked, which can increase the number of batteries in a limited space, thereby increasing the total battery capacity of the energy storage device, which helps to extend the battery life of the energy storage device and meet the needs of long-term use. In addition, the stacked design makes the layout of the battery modules more compact, and further makes the layout of the energy storage device more compact, improving the stability and robustness of the energy storage device, and helping to enhance the earthquake resistance and shock resistance of the device.

[0061] Please continue to refer to Appendix Figure 1 to Appendix Figure 3 As shown in the figure, the energy storage device further includes a second heat dissipation member 500, which is disposed on opposite sides of the battery pack 200 in the second direction and is connected to the battery pack 200. Among them, the second heat dissipation member 500 may include heat dissipation fins. The second heat dissipation member 500 is disposed on both sides of the battery pack 200 and is connected to the battery pack 200, which can effectively increase the heat dissipation area, significantly improve the heat dissipation efficiency, and ensure that the battery pack maintains an appropriate temperature during high-load operation. In addition, the second heat dissipation member 500 complements the first heat dissipation member 400 to maximize the heat dissipation effect of the energy storage device.

[0062] In one possible implementation, please refer to Appendix Figure 6 As shown in the figure, the battery pack 200 includes a box body 210 and a battery module 220. Among them, the box body 210 includes an installation cavity 211, and the installation cavity 211 penetrates through the box body 210 in the second direction, so that the installation cavity 211 is a through cavity that is connected left and right. The battery module 220 is installed in the installation cavity 211, and the box body 210 is used to protect the battery module 220, improving the safety of the battery pack 200. Among them, the material of the box body 210 may include aluminum, which can reduce the weight of the energy storage device, facilitate the carrying of the energy storage device, and improve the carrying convenience of the energy storage device.

[0063] The second heat dissipation member 500 is installed in the installation cavity 211 and covers the opening of the installation cavity 211 in the second direction. With such a setting, it helps the heat generated during the operation of the battery module 220 to be dissipated in time, preventing the battery module 220 from overheating, thereby extending the service life of the battery pack 200 and improving its working efficiency. In addition, it can also make the maintenance and replacement of the battery module 220 more convenient. Users can easily check and replace the battery module 220, reducing the maintenance cost.

[0064] It should be noted that the battery module 220 can be directly installed in the installation cavity 211, or there can be other installation methods. Exemplarily, the battery module 220 is fixed in the installation cavity 211 through the fixing frame 230. For example, the battery module 220 can be first fixedly connected to the fixing frame 230, and then the fixing frame 230 is installed in the installation cavity 211. In this way, the installation of the battery module 220 and the box body 210 can be facilitated, and the assembly convenience between the battery module 220 and the box body 210 can be improved.

[0065] In this embodiment, the fixing frame 230 includes a first fixing frame 231, a second fixing frame 232, and a connecting beam 233 connecting the first fixing frame 231 and the second fixing frame 232. Among them, the number of the connecting beams 233 can be four, which is beneficial to improving the structural strength of the fixing frame 230.

[0066] In order to facilitate the connection between the battery module 220 and the fixing frame 230 and reduce the damage to the end plate of the battery module 220, the battery module 220 in this embodiment is connected to the fixing frame 230 through the connecting plate 240.

[0067] Please refer to the appendix Figure 7 and the appendix Figure 8 , the battery module 220 includes a plurality of battery cells 250, and the plurality of battery cells 250 are arranged along the first direction; the heating member 300 is disposed at the bottom of the plurality of battery cells 250; the plurality of battery cells 250 are heated by the heating member 300, so that the energy storage device can meet a colder environment and ensure the normal operation of the energy storage device.

[0068] In this example, the heating member 300 can include a heating film, and the material of the heating film is silicone rubber. The silicone heating film has good wear resistance. There is no need for adhesive treatment between the silicone heating film and the battery cell 250, and there is no risk of glue tearing. Under the action of the overall downward pressure of the battery cell 250, it can be stably fixed at the bottom and will not fall off due to long-term use, resulting in a dry burning risk.

[0069] Please continue to refer to the appendix Figure 7, in this embodiment, the sides of multiple battery cell monomers 250 in the second direction are connected to the second heat sink 500 through a thermal pad 600. The thermal pad 600 can effectively conduct the heat generated by the battery cell monomers 250 to the second heat sink 500. In this way, the heat can be quickly transferred from the battery cell monomers 250 to the second heat sink 500, thereby accelerating the heat dissipation, preventing the battery cells from overheating, and improving the heat dissipation efficiency of the battery pack. In addition, the thermal pad 600 helps to evenly distribute the heat of the battery cell monomers 250 and avoid local overheating. This uniform temperature distribution helps all the battery cell monomers 250 to maintain a consistent working state, thereby improving the overall performance and reliability of the battery pack.

[0070] In this embodiment, in order to ensure the performance and safety of the energy storage battery pack, a 3-mm 700 is arranged between every 4 battery cell monomers 250 in sequence, an insulating sheet 800 with a thickness of 0.5 mm is arranged between every 2 battery cell monomers 250, and an insulating sheet 800 with a thickness of 0.5 mm is also placed between the end plate and the battery cell monomers; there are a total of 3 gel sheets 700 and 14 insulating sheets 800 in the battery pack, which can take into account the protection against thermal runaway of the battery cells while reducing the cost.

[0071] In this embodiment, the battery module 220 further includes a bottom plate 260 and a cover plate 270, and the bottom plate 260 and the cover plate 270 are respectively arranged at the bottom and the top of the multiple battery cell monomers 250; among them, the thickness of the bottom plate 260 is 1 mm, which has the functions of fire prevention barrier and insulation safety protection.

[0072] The battery module 220 further includes a battery management module 280, and the battery management module 280 is fixed on the connecting beam 233 through an electrical fixing plate. In this way, not only the structural stability and space utilization rate of the battery module are improved, but also the installation process is simplified, the reliability of the electrical connection and the seismic performance are enhanced, which is convenient for heat dissipation management and system integration, and finally the maintenance cost is reduced.

[0073] Please refer to the appendix Figure 8 , the battery module 220 further includes a strapping band 290, and the multiple battery cell monomers 250 can be fixed by using the strapping band 290, which improves the structural stability of the battery module 220.

[0074] In a possible implementation manner, the energy storage device provided by the embodiment of the present application further includes a support base 900; the battery assembly is arranged on the support base 900. The support base 900 provides a stable foundation for the battery assembly, prevents the battery assembly from shifting or toppling due to vibration or external force during use, and thus improves the overall structural stability of the energy storage device. In addition, the support base 900 can be designed into a structure with shock-absorbing functions, which can effectively absorb and buffer external vibrations and impacts, protect the battery assembly from mechanical damage, and improve the durability and reliability of the energy storage device.

[0075] In the present specification, the various embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0076] It should be noted that the "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily each embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining a specific feature, structure or characteristic with an embodiment, it is within the knowledge scope of those skilled in the art to implement such feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. An energy storage device, characterized in that: include: A battery assembly, the battery assembly comprising a support member and at least two battery packs, the support member comprising a receiving cavity; at least two battery packs are arranged in the receiving cavity at intervals; a heating element is arranged at the bottom of each battery pack; The first heat sink is disposed in the accommodating cavity and between adjacent battery packs.

2. The energy storage device according to claim 1, characterized in that: The support member comprises a first support plate and a second support plate which are arranged opposite to each other in a first direction; the first support plate and the second support plate enclose a containing cavity; At least two of the battery packs are arranged in the accommodating cavity at intervals along a second direction; the second direction intersects with the first direction.

3. The energy storage device according to claim 2, characterized in that: An air inlet is provided on one of the first support plate and the second support plate, and an air outlet is provided on one of the first support plate and the second support plate; The first heat dissipation element is arranged on the support plate where the air outlet is located, and covers the air outlet.

4. The energy storage device according to claim 3, characterized in that: The air outlet is arranged on the first supporting plate, and the number of the air outlet is multiple; The plurality of air outlets are arranged in a plurality of rows on the first support plate.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: There are two battery assemblies, one of which is arranged on the other battery assembly.

6. The energy storage device according to any one of claims 1 to 4, characterized in that: It also includes a second heat sink, which is disposed on two opposite sides of the battery pack in a second direction and connected to the battery pack.

7. The energy storage device according to claim 6, characterized in that: The battery pack includes a box body and a battery module; The box body comprises an installation cavity, and the installation cavity penetrates the box body along the second direction; the battery module is installed in the installation cavity; The second heat dissipation element is installed in the installation cavity and covers the opening of the installation cavity in the second direction.

8. The energy storage device according to claim 7, characterized in that: The battery module is fixed in the installation cavity by a fixing frame.

9. The energy storage device according to claim 7, characterized in that: The battery module comprises a plurality of battery cells, and the plurality of battery cells are arranged along a first direction; The heating element is arranged at the bottom of the plurality of battery cells; The side surfaces of the plurality of battery core units in the second direction are connected to the second heat sink through the thermal pads.

10. The energy storage device according to any one of claims 1 to 4, characterized in that: The energy storage device also includes a support base; the battery assembly is arranged on the support base.

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