Energy storage device and energy storage system

Abstract

The utility model belongs to the technical field of batteries, and relates to an energy storage device and an energy storage system. The energy storage device comprises a battery pack, a liquid cooling plate and at least one heat dissipation module arranged between the battery pack and the liquid cooling plate, the heat dissipation module comprises a first heat dissipation plate and a second heat dissipation plate, a first fin set is arranged on the surface of one side of the first heat dissipation plate, a second fin set is arranged on the surface of one side of the second heat dissipation plate, and the first fin set and the second fin set are connected in an inserted mode; the face, away from the first fin set, of the first heat dissipation plate is connected with the battery pack, and the face, away from the second fin set, of the second heat dissipation plate is connected with the liquid cooling plate. According to the invention, the first fin group and the second fin group which are mutually inserted can quickly transfer heat generated by the battery pack into the liquid cooling plate, so that the heat dissipation efficiency is improved, the probability of dislocation movement of the battery pack and the liquid cooling plate is reduced, and the heat dissipation stability of the battery pack is further ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to an energy storage device and an energy storage system. Background Art

[0002] When the energy storage device is transported, the battery pack and the liquid cooling plate in the energy storage device are moved and misaligned, causing the heat conduction area between the liquid cooling plate and the battery pack to change, making it difficult to ensure the heat dissipation stability of the battery pack. Utility Model Content

[0003] The embodiments of the present application provide an energy storage device and an energy storage system for solving the problem of poor heat dissipation stability of battery packs in the prior art.

[0004] In order to solve the above technical problems, the present application provides an energy storage device, which adopts the following technical solution:

[0005] An energy storage device comprises: a battery pack, a liquid cooling plate, and at least one heat dissipation module arranged between the battery pack and the liquid cooling plate; the heat dissipation module comprises a first heat dissipation plate and a second heat dissipation plate, a first fin group is arranged on one side surface of the first heat dissipation plate, a second fin group is arranged on one side surface of the second heat dissipation plate, and the first fin group and the second fin group are plugged into each other; a side of the first heat dissipation plate away from the first fin group is connected to the battery pack, and a side of the second heat dissipation plate away from the second fin group is connected to the liquid cooling plate.

[0006] Furthermore, the first fin group includes a plurality of first heat dissipation fins arranged at intervals, the second fin group includes a plurality of second heat dissipation fins arranged at intervals, one second heat dissipation fin is provided between every two first heat dissipation fins, and one first heat dissipation fin is provided between every two second heat dissipation fins.

[0007] Further, the thickness of the end of the first heat dissipation fin close to the first heat dissipation plate is greater than the thickness of the end of the first heat dissipation fin away from the first heat dissipation plate; and / or

[0008] The thickness of the end portion of the second heat dissipation fin adjacent to the second heat dissipation plate is greater than the thickness of the end portion of the second heat dissipation fin away from the second heat dissipation plate.

[0009] Furthermore, each of the first heat dissipation fins abuts against one of the second heat dissipation fins, and each of the second heat dissipation fins abuts against one of the first heat dissipation fins.

[0010] Further, a first thermal pad is provided between the first heat sink fin and the second heat sink fin. Further, a second thermal pad is provided between the first heat sink and the battery pack; and / or

[0011] A third thermal pad is provided between the second heat dissipation plate and the liquid cooling plate.

[0012] Furthermore, the liquid cooling plate includes a main board and two side boards, the two side boards are respectively arranged at both ends of the main board and are arranged perpendicular to the main board, the main board and the side boards are provided with liquid cooling channels interconnected with each other, the main board presses against one side surface of the battery pack, and the two side boards respectively press against both end surfaces of the battery pack; the heat dissipation module is provided between the main board and / or the side board and the battery pack, and the second heat dissipation plate is provided on a side of the main board and / or the side board adjacent to the battery pack.

[0013] Furthermore, the liquid cooling plate also includes a partition plate, which is arranged on the side wall of the main board and located between the two side plates, and the liquid cooling channel connects the main board and the partition plate; the battery pack includes a plurality of battery modules, and the plurality of battery modules are arranged in sequence on one side of the main board, and the partition plate is provided between two adjacent battery modules, and the first heat dissipation plate is provided on a side of the battery module adjacent to the main board.

[0014] Furthermore, a fourth thermal pad is provided between the partition plate and the battery module.

[0015] In order to solve the above technical problems, the embodiment of the present application provides an energy storage system, which adopts the following technical solutions:

[0016] An energy storage system comprises the energy storage device as described above.

[0017] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects: the first fin group and the second fin group that are plugged into each other can quickly transfer the heat generated by the battery pack to the liquid cooling plate, thereby improving the heat dissipation efficiency and reducing the probability of misalignment and movement between the battery pack and the liquid cooling plate, thereby ensuring the structural stability of the entire energy storage device and further ensuring the heat dissipation stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a structural schematic diagram of an energy storage device provided in an embodiment of the present application;

[0020] Figure 2 yes Figure 1A schematic structural diagram of an embodiment of a heat dissipation module;

[0021] Figure 3 yes Figure 1 A schematic structural diagram of another embodiment of the heat dissipation module.

[0022] Figure numerals: 1. battery pack; 11. battery module; 2. liquid cooling plate; 21. main board; 22. side panel; 23. partition plate; 3. heat dissipation module; 31. first heat dissipation plate; 32. first fin group; 321. first heat dissipation fins; 33. second heat dissipation plate; 34. second fin group; 341. second heat dissipation fins. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] The present application embodiment provides an energy storage device, such as Figure 1 to Figure 2 As shown, the energy storage device includes: a battery pack 1, a liquid cooling plate 2, and at least one heat dissipation module 3 arranged between the battery pack 1 and the liquid cooling plate 2; the heat dissipation module 3 includes a first heat dissipation plate 31 and a second heat dissipation plate 33, one side surface of the first heat dissipation plate 31 is provided with a first fin group 32, one side surface of the second heat dissipation plate 33 is provided with a second fin group 34, and the first fin group 32 and the second fin group 34 are plugged into each other; the first heat dissipation plate 31 is connected to the battery pack 1 at a side away from the first fin group 32, and the second heat dissipation plate 33 is connected to the liquid cooling plate 2 at a side away from the second fin group 34.

[0027] The working principle of an energy storage device provided in an embodiment of the present application is as follows: the heat generated by the battery pack 1 during operation is transferred to the first fin group 32 through the first heat sink 31, the heat adsorbed by the first fin group 32 is conducted to the second fin group 34, and finally the heat is transferred to the liquid cooling plate 2 through the second heat sink 33 to achieve heat dissipation of the battery pack 1.

[0028] The beneficial effects of an energy storage device provided by an embodiment of the present application are as follows: on the one hand, a first fin group 32 is arranged on the first heat dissipation plate 31, and a second fin group 34 is arranged on the second heat dissipation plate 33, so that the heat generated by the battery pack 1 can be quickly transferred to the liquid cooling plate 2, thereby improving the heat dissipation efficiency; on the other hand, the battery pack 1 can only be moved if the force generated when the battery pack 1 is displaced during transportation of the energy storage device is greater than the force caused by the deformation of the first fin group 32 and the second fin group 34. In this way, the first fin group 32 and the second fin group 34 that are plugged into each other reduce the probability of misalignment between the battery pack 1 and the liquid cooling plate 2, thereby ensuring the structural stability of the entire energy storage device, and further ensuring the heat dissipation stability of the battery pack 1.

[0029] Further, the first fin group 32 includes a plurality of first heat dissipation fins 321 arranged at intervals, the second fin group 34 includes a plurality of second heat dissipation fins 341 arranged at intervals, one second heat dissipation fin 341 is provided between every two first heat dissipation fins 321, and one first heat dissipation fin 321 is provided between every two second heat dissipation fins 341. That is, the first heat dissipation fins 321 and the second heat dissipation fins 341 are arranged alternately.

[0030] In the present embodiment, a second heat dissipation fin 341 is provided between every two first heat dissipation fins 321, and a first heat dissipation fin 321 is provided between every two second heat dissipation fins 341, so that the heat generated by the battery pack 1 can be evenly dissipated through the first fin group 32 and the second fin group 34, thereby preventing different heat dissipation effects at different positions of the battery pack 1, thereby improving the heat dissipation stability of the battery pack 1.

[0031] like Figure 3 As shown, further, the thickness of the end of the first heat dissipation fin 321 adjacent to the first heat dissipation plate 31 is greater than the thickness of the end of the first heat dissipation fin 321 away from the first heat dissipation plate 31 .

[0032] In this embodiment, the contact area between the first heat dissipation fin 321 and the first heat dissipation plate 31 is increased, which, on the one hand, improves the heat dissipation effect of the heat dissipation module 3, and on the other hand, makes it difficult for the first heat dissipation fin 321 to deform, thereby requiring a greater force to be overcome when the battery pack 1 is displaced, thereby further reducing the probability of misalignment between the battery pack 1 and the liquid cooling plate 2, ensuring the structural stability of the entire energy storage device, and thus ensuring the heat dissipation effect of the battery pack 1.

[0033] Furthermore, the thickness of the end of the second heat dissipation fin 341 close to the second heat dissipation plate 33 is greater than the thickness of the end of the second heat dissipation fin 341 away from the second heat dissipation plate 33 .

[0034] In this embodiment, the contact area between the second heat dissipation fin 341 and the second heat dissipation plate 33 is increased, which, on the one hand, improves the heat dissipation effect of the heat dissipation module 3, and on the other hand, makes it difficult for the second heat dissipation fin 341 to deform, thereby requiring a greater force to be overcome when the battery pack 1 is displaced, thereby further reducing the probability of misalignment between the battery pack 1 and the liquid cooling plate 2, ensuring the structural stability of the entire energy storage device, and thus ensuring the heat dissipation effect of the battery pack 1.

[0035] Preferably, the thickness of the end of the first heat dissipation fin 321 adjacent to the first heat dissipation plate 31 is greater than the thickness of the end of the first heat dissipation fin 321 away from the first heat dissipation plate 31; and the thickness of the end of the second heat dissipation fin 341 adjacent to the second heat dissipation plate 33 is greater than the thickness of the end of the second heat dissipation fin 341 away from the second heat dissipation plate 33.

[0036] Furthermore, each of the first heat dissipation fins 321 abuts against one of the second heat dissipation fins 341 , and each of the second heat dissipation fins 341 abuts against one of the first heat dissipation fins 321 .

[0037] In this embodiment, the first heat dissipation fin 321 abuts against the second heat dissipation fin 341, thereby increasing the contact area between the first heat dissipation fin 321 and the second heat dissipation fin 341 and forming a continuous heat dissipation path, so that the heat adsorbed on the first heat dissipation fin 321 can be quickly and effectively transferred to the second heat dissipation fin 341, thereby improving the efficiency of heat conduction.

[0038] Furthermore, a first thermal pad (not shown) is disposed between the first heat dissipation fins 321 and the second heat dissipation fins 341 .

[0039] In the present embodiment, a first thermal pad is provided between the first heat dissipation fin 321 and the second heat dissipation fin 341 to increase the heat conduction area of ​​the first heat dissipation fin 321 and the second heat dissipation fin 341, so that the heat adsorbed on the first heat dissipation fin 321 can be quickly and effectively transferred to the second heat dissipation fin 341, thereby improving the efficiency of heat conduction; in addition, the first heat dissipation fin 321 and the second heat dissipation fin 341 are difficult to deform, so that a greater force needs to be overcome when the battery pack 1 is displaced, thereby further reducing the probability of misalignment between the battery pack 1 and the liquid cooling plate 2, thereby ensuring the structural stability of the entire energy storage device and the heat dissipation effect of the battery pack 1.

[0040] Furthermore, a second thermal pad (not shown) is provided between the first heat sink 31 and the battery pack 1 .

[0041] In this embodiment, a second thermal pad is disposed between the first heat sink 31 and the battery pack 1 , which can prevent the first heat sink 31 from rubbing against the battery pack 1 and avoid damage to the battery pack 1 while ensuring heat conduction.

[0042] Furthermore, a third thermal pad (not shown) is provided between the second heat sink 33 and the liquid cooling plate 2 .

[0043] In this embodiment, a third thermal pad is disposed between the second heat sink 33 and the liquid circuit plate to avoid a small heat conduction area between the liquid cooling plate 2 and the second heat sink 33 due to an uneven outer surface of the liquid cooling plate 2 .

[0044] like Figure 1 As shown, further, the liquid cooling plate 2 includes a main board 21 and two side boards 22, the two side boards 22 are respectively arranged at the two ends of the main board 21 and are arranged perpendicular to the main board 21, and the main board 21 and the side boards 22 are provided with liquid cooling channels (not shown) interconnected with each other, the main board 21 presses against one side surface of the battery pack 1, and the two side boards 22 press against the two end surfaces of the battery pack 1 respectively; the heat dissipation module 3 is provided between the main board 21 and / or the side board 22 and the battery pack 1, and the second heat dissipation plate 33 is provided on a side of the main board 21 and / or the side board 22 adjacent to the battery pack 1.

[0045] Optionally, a heat dissipation module 3 is provided between the mainboard 21 and the battery pack 1 , and a second heat dissipation plate 33 is provided on a side of the mainboard 21 adjacent to the battery pack 1 .

[0046] Optionally, a heat dissipation module 3 is provided between the side plate 22 and the battery pack 1 , and a second heat dissipation plate 33 is provided on a side of the side plate 22 adjacent to the battery pack 1 .

[0047] In this embodiment, the liquid cooling plate 2 includes a main board 21 and a side board 22, so that the sides and ends of the battery pack 1 can dissipate heat, and the sides and ends of the battery pack 1 are fixed, which effectively prevents the battery pack 1 from moving, thereby ensuring the heat dissipation stability of the battery pack 1.

[0048] Furthermore, the liquid cooling plate 2 also includes a partition plate 23, which is arranged on the side wall of the main board 21 and between the two side plates 22, and the liquid cooling channel connects the main board 21 and the partition plate 23; the battery pack 1 includes a plurality of battery modules 11, and the plurality of battery modules 11 are arranged in sequence on one side of the main board 21, and the partition plate 23 is provided between two adjacent battery modules 11, and the first heat dissipation plate 31 is provided on a side of the battery module 11 adjacent to the main board 21.

[0049] In this embodiment, when the battery pack 1 includes a plurality of battery modules 11 , a partition plate 23 is provided between two adjacent battery modules 11 to improve the heat dissipation effect of the battery modules 11 and fix the battery modules 11 , thereby ensuring the heat dissipation stability of the battery pack 1 .

[0050] Furthermore, a fourth thermal pad (not shown) is provided between the partition plate 23 and the battery module 11 .

[0051] In this embodiment, a fourth thermal pad is disposed between the partition plate 23 and the battery module 11 to avoid a small heat conduction area between the partition plate 23 and the battery module 11 due to an uneven outer surface of the partition plate 23 in the liquid cooling plate 2 .

[0052] Optionally, the first thermal pad, the second thermal pad, the third thermal pad and the fourth thermal pad are independently one of a silicone sheet, a silicone grease sheet or a silicone film sheet, which can be selected according to actual conditions and is not limited in this application.

[0053] In addition, the first thermal pad, the second thermal pad, the third thermal pad and the fourth thermal pad have a certain elasticity; ensure that the first thermal pad can fit tightly with the first heat sink fin 321 and the second heat sink fin 341, improve the thermal conductivity of the first thermal pad, thereby improving the heat dissipation effect of the heat dissipation module 3; ensure that the second thermal pad can fit tightly with the first heat sink 31 and the battery module 11 of the battery pack 1, improve the thermal conductivity of the second thermal pad, thereby improving the heat dissipation effect of the heat dissipation module 3; ensure that the third thermal pad can fit tightly with the second heat sink 33 and the mainboard 21 of the liquid cooling plate 2, improve the thermal conductivity of the third thermal pad, thereby improving the heat dissipation effect of the heat dissipation module 3; ensure that the fourth thermal pad can fit tightly with the partition plate 23 and the battery module 11 of the battery pack 1, improve the thermal conductivity of the fourth thermal pad, thereby improving the heat dissipation effect of the heat dissipation module 3.

[0054] An embodiment of the present application also provides an energy storage system, which includes the energy storage device as described above.

[0055] In the present embodiment, the energy storage device of the energy storage system is provided with a first fin group 32 on the first heat sink 31 and a second fin group 34 on the second heat sink 33, so that the heat generated by the battery pack 1 can be quickly transferred to the liquid cooling plate 2, thereby improving the heat dissipation efficiency; on the other hand, the battery pack 1 can only be moved if the force generated when the battery pack 1 is displaced in the transport energy storage device is greater than the force of deformation of the first fin group 32 and the second fin group 34. In this way, the first fin group 32 and the second fin group 34 that are plugged into each other reduce the probability of misalignment between the battery pack 1 and the liquid cooling plate 2, thereby ensuring the structural stability of the entire energy storage device, and further ensuring the heat dissipation stability of the battery pack 1.

[0056] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An energy storage device, characterized in that: include: A battery pack (1), a liquid cooling plate (2), and at least one heat dissipation module (3) arranged between the battery pack (1) and the liquid cooling plate (2); the heat dissipation module (3) comprises a first heat dissipation plate (31) and a second heat dissipation plate (33); a first fin group (32) is arranged on one side surface of the first heat dissipation plate (31); a second fin group (34) is arranged on one side surface of the second heat dissipation plate (33); the first fin group (32) and the second fin group (34) are plugged into each other; a side of the first heat dissipation plate (31) away from the first fin group (32) is connected to the battery pack (1); a side of the second heat dissipation plate (33) away from the second fin group (34) is connected to the liquid cooling plate (2).

2. The energy storage device according to claim 1, characterized in that: The first fin group (32) comprises a plurality of first heat dissipation fins (321) arranged at intervals, the second fin group (34) comprises a plurality of second heat dissipation fins (341) arranged at intervals, one of the second heat dissipation fins (341) is arranged between every two of the first heat dissipation fins (321), and one of the first heat dissipation fins (321) is arranged between every two of the second heat dissipation fins (341).

3. The energy storage device according to claim 2, characterized in that: The thickness of the end of the first heat dissipation fin (321) adjacent to the first heat dissipation plate (31) is greater than the thickness of the end of the first heat dissipation fin (321) away from the first heat dissipation plate (31); and / or The thickness of the end of the second heat dissipation fin (341) adjacent to the second heat dissipation plate (33) is greater than the thickness of the end of the second heat dissipation fin (341) away from the second heat dissipation plate (33).

4. The energy storage device according to claim 2, characterized in that: Each of the first heat dissipation fins (321) is respectively in contact with one of the second heat dissipation fins (341), and each of the second heat dissipation fins (341) is respectively in contact with one of the first heat dissipation fins (321).

5. The energy storage device according to claim 2, characterized in that: A first heat conduction pad is provided between the first heat dissipation fin (321) and the second heat dissipation fin (341).

6. The energy storage device according to any one of claims 1 to 5, characterized in that: A second thermal pad is provided between the first heat dissipation plate (31) and the battery pack (1); and / or A third heat conducting pad is provided between the second heat dissipation plate (33) and the liquid cooling plate (2).

7. The energy storage device according to any one of claims 1 to 5, characterized in that: The liquid cooling plate (2) comprises a main board (21) and two side boards (22), the two side boards (22) being respectively arranged at two ends of the main board (21) and being arranged perpendicularly to the main board (21), the main board (21) and the side boards (22) being provided with liquid cooling channels interconnected with each other, the main board (21) pressing against one side surface of the battery pack (1), and the two side boards (22) pressing against two end surfaces of the battery pack (1) respectively; the heat dissipation module (3) being provided between the main board (21) and / or the side boards (22) and the battery pack (1), and the second heat dissipation plate (33) being provided on a side of the main board (21) and / or the side boards (22) adjacent to the battery pack (1).

8. The energy storage device according to claim 7, characterized in that: The liquid cooling plate (2) further comprises a partition plate (23), the partition plate (23) being arranged on the side wall of the main board (21) and between the two side boards (22), the liquid cooling channel being connected to the main board (21) and the partition plate (23); the battery pack (1) comprises a plurality of battery modules (11), the plurality of battery modules (11) being arranged in sequence on one side of the main board (21), the partition plate (23) being arranged between two adjacent battery modules (11), and the first heat dissipation plate (31) being arranged on a side of the battery module (11) adjacent to the main board (21).

9. The energy storage device according to claim 8, characterized in that: A fourth heat-conducting pad is provided between the partition plate (23) and the battery module (11).

10. An energy storage system, characterized in that: Comprising the energy storage device as claimed in any one of claims 1 to 9.

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