Cooling system, energy storage equipment and energy storage system

Abstract

The utility model discloses a cooling system, energy storage equipment and an energy storage system, and relates to the technical field of energy storage equipment. The cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively located on different sides of the cooling plate; the liquid inlet and the liquid outlet are communicated through a plurality of first flow channels. According to the cooling system provided by the utility model, the liquid inlet and the liquid outlet in the cooling plate are formed in the positions of different sides of the cooling plate, so that the length of the first flow channel for communicating the liquid inlet and the liquid outlet is reduced, the stroke of a cooling medium is shortened, the temperature difference between the liquid inlet and the liquid outlet is reduced, the heat dissipation effect of the cooling system is improved, and the service life of the cooling system is prolonged. Meanwhile, the energy consumption of the liquid cooling unit is reduced, and the service life of the cooling system is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage device technical field more specifically, relate to a cooling system, energy storage device and energy storage system. BACKGROUND

[0002] The heat dissipation mode of the traditional battery module is to set a cooling plate at the bottom of the battery module, set a cooling pipeline on the cooling plate, and set the liquid inlet and the liquid outlet on the same side of the cooling plate. When working, the cooling liquid enters from the liquid inlet, passes through the serpentine cooling pipeline, and then flows out from the liquid outlet on the same side of the liquid inlet. However, since the liquid inlet and the liquid outlet are arranged on the same side of the cooling plate, the cooling liquid has a long travel distance from the liquid inlet to the liquid outlet, resulting in a large temperature difference between the liquid inlet and the liquid outlet, and poor heat dissipation effect of the cooling system.

[0003] Therefore, how to improve the heat dissipation effect of the cooling system has become a technical problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a cooling system to improve the heat dissipation effect of the cooling system.

[0005] Another purpose of the utility model is to provide an energy storage device with the above cooling system.

[0006] Another purpose of the utility model is to provide an energy storage system with the above energy storage device.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A cooling system for heat dissipation of an energy storage device, comprising:

[0009] A cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are located on opposite sides of the cooling plate, respectively. The liquid inlet and the liquid outlet are connected by a plurality of first flow channels.

[0010] Optionally, in the above cooling system, the liquid inlet and the liquid outlet are arranged on opposite sides of the cooling plate.

[0011] Optionally, in the above cooling system, the liquid inlet and the liquid outlet are coaxially arranged, and each first flow channel is arranged in parallel.

[0012] Optionally, in the above cooling system, at least one partition is arranged on the cooling plate in the direction from the liquid inlet to the liquid outlet, and a second flow channel is arranged in the partition.

[0013] The liquid inlet end of the second flow channel is in communication with the liquid inlet of the cooling plate; and the liquid outlet end of the second flow channel is in communication with the liquid outlet of the cooling plate.

[0014] The plane of the partition plate and the plane of the cooling plate have a non-zero included angle.

[0015] An energy storage device comprising a cabinet and a cooling system arranged in the cabinet, the cooling system being the cooling system according to any one of the preceding items.

[0016] The cabinet is provided with a plurality of battery modules, and the cooling plate is adapted to the battery module.

[0017] Optionally, in the energy storage device, the cooling plates are in communication through a main pipe, and the main pipe comprises a liquid inlet main pipe for communicating with the liquid inlets of the cooling plates and a liquid outlet main pipe for communicating with the liquid outlets of the cooling plates.

[0018] Optionally, in the energy storage device, the liquid inlets and / or the liquid outlets are connected to the main pipe through arc-shaped pipes, and the curvatures of the arc-shaped pipes are different along the flow direction of the liquid inlet main pipe.

[0019] Optionally, in the energy storage device, the included angle between the first flow channel and the main pipe is not less than 90°.

[0020] Optionally, in the energy storage device, the included angle between the first flow channel and the main pipe is 90°, and the diameters of the liquid inlets and the liquid outlets on the cooling plates change in turn along the flow direction of the cooling liquid in the liquid inlet main pipe.

[0021] Optionally, in the energy storage device, a plurality of battery clusters are included.

[0022] The liquid inlet main pipe of at least one of the battery clusters and the liquid outlet main pipe of an adjacent battery cluster are located on the same side of the cabinet; or,

[0023] The liquid inlet main pipe and the liquid outlet main pipe of at least one of the battery clusters are located on the same side of the cabinet.

[0024] Optionally, in the energy storage device, the liquid inlet main pipe and the liquid outlet main pipe are inclinedly arranged on the side of the cabinet.

[0025] An energy storage system comprising the energy storage device according to any one of the preceding items.

[0026] The cooling system provided by the utility model, through setting the liquid inlet and liquid outlet on the cooling plate on the positions of different sides of the cooling plate, and the liquid inlet and liquid outlet are communicated through the first flow channel, thereby the length of the first flow channel connecting the liquid inlet and liquid outlet can be reduced, the stroke of the cooling medium is shortened, the temperature difference between the liquid inlet and liquid outlet is reduced, the heat dissipation effect of the cooling system is improved, the energy consumption of the liquid cooling unit is reduced, and the service life of the cooling system is prolonged.

[0027] The technical features mentioned above, the technical features mentioned below and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible combinations of features are explicitly described herein. Any one of the multiple features included in the same sentence can be applied independently, and does not have to be applied together with other features. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0029] Figure 1 Structure diagram of a traditional cooling system Figure 1

[0030] Figure 2 Structure diagram of a traditional cooling system Figure 2

[0031] Figure 3 Structure diagram of a traditional cooling system Figure 3

[0032] Figure 4 Structure diagram of the cooling system provided by the first embodiment of the utility model;

[0033] Figure 5 Structure diagram of the cooling system provided by the second embodiment of the utility model;

[0034] Figure 6 Structure diagram of the cooling system provided by the third embodiment of the utility model;

[0035] Figure 7 Structure diagram of the cooling system provided by the fourth embodiment of the utility model;

[0036] Figure 8 ​​​The utility model discloses a cooling system's structure schematic drawing for the embodiment five of the utility model provides.

[0037] Figure 9 The utility model discloses a cooling system's structure schematic drawing for the embodiment six of the utility model provides.

[0038] Figure 10 The utility model discloses a cooling system's structure schematic drawing for the embodiment seven of the utility model provides.

[0039] Figure 11 The utility model discloses a cooling system's structure schematic drawing for the embodiment eight of the utility model provides.

[0040] Figure 12 The utility model discloses a cooling system's structure schematic drawing for the embodiment nine of the utility model provides.

[0041] Figure 13 The utility model discloses a cooling system's structure schematic drawing for the embodiment one of the utility model provides.

[0042] Figure 14 The utility model discloses a cooling system's structure schematic drawing for the embodiment two of the utility model provides.

[0043] Among them, 100 is cooling plate, 101 is first flow channel, 101a is second flow channel, 102 is liquid inlet, 103 is liquid outlet, 104 is main pipeline, 1041 is liquid inlet main pipeline, 1042 is liquid outlet main pipeline, 1043 is arc pipeline, 105 is baffle, 106 is side plate. DETAILED DESCRIPTION

[0044] The utility model discloses a cooling system to improve the heat dissipation effect of cooling system.

[0045] Another core of the utility model lies in providing a kind of energy storage equipment with the cooling system described above.

[0046] Another core of the utility model lies in providing a kind of energy storage system with the energy storage equipment described above.

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0048] Liquid cooling battery module technology, referred to as liquid cooling PACK technology, is an integrated solution for efficient thermal management of battery modules in energy storage equipment by using liquid cooling technology. Specifically, liquid cooling PACK technology directly or indirectly contacts battery modules with cooling liquid to achieve precise control of battery temperature, thereby ensuring that the battery works normally within the appropriate working temperature range.

[0049] As shown in Figure 1 and Figure 2 , the heat dissipation mode of the conventional battery module is to set a cooling plate 100 at the bottom of the battery module, and set 101 on the cooling plate 100, and set the liquid inlet 102 and the liquid outlet 103 on the same side of the cooling plate 100. When working, as shown in Figure 1 , the cooling liquid enters from the liquid inlet 102, passes through the serpentine first flow channel 101, and then flows out from the liquid outlet 103 on the same side as the liquid inlet 102, resulting in a long travel of the cooling liquid, and a large temperature difference between the liquid inlet 102 and the liquid outlet 103. Of course, as shown in Figure 2 , the first flow channel 101 can also be arranged in a U-shaped distribution, although the travel of the cooling liquid is shortened, but the temperature difference between the liquid inlet 102 and the liquid outlet 103 is still large. Due to the fact that the liquid inlet 102 and the liquid outlet 103 are arranged on the same side of the cooling plate 100, the cooling liquid travels a long distance from the liquid inlet 102 to the liquid outlet 103, resulting in a large temperature difference between the liquid inlet 102 and the liquid outlet 103, and poor heat dissipation effect of the cooling system.

[0050] At the same time, as shown in Figure 3 , when a plurality of cooling plates 100 are connected through the main pipeline 104, the liquid inlets 102 of the cooling plates 100 are connected to the liquid inlet main pipeline 1041, and the liquid outlets 103 of the cooling plates 100 are connected to the liquid outlet main pipeline 1042. However, due to the influence of the high and low potential of the main pipeline 104, the liquid flow rate increases from top to bottom, resulting in that the cooling plate 100 at the bottom has a better heat dissipation effect and the temperature of the liquid outlet 103 is lower, while the cooling plate 100 at the top has a poor heat dissipation effect and the temperature of the liquid outlet 103 is higher, resulting in poor temperature uniformity between different battery modules, thereby causing temperature difference between different battery modules, and further causing instability of the entire energy storage equipment.

[0051] Therefore, as shown in Figures 4 to 12The utility model discloses an embodiment shown in a kind of cooling system for heat dissipation of energy storage equipment, including cooling plate 100.Through the inlet 102 and outlet 103 on cooling plate 100 are set in the position of different side of cooling plate 100, to reduce the length of first flow channel 101 that inlet 102 and outlet 103 are communicated, to shorten the journey of cooling medium in turn, reduce the temperature difference of inlet 102 and outlet 103, improve the heat dissipation effect of cooling system, while the energy consumption of liquid cooling unit can be reduced, improve the service life of cooling system.

[0052] The utility model discloses an embodiment shown in a kind of cooling system for heat dissipation of energy storage equipment, including cooling plate 100.Through the inlet 102 and outlet 103 on cooling plate 100 are set in the position of different side of cooling plate 100, to reduce the length of first flow channel 101 that inlet 102 and outlet 103 are communicated, to shorten the journey of cooling medium in turn, reduce the temperature difference of inlet 102 and outlet 103, improve the heat dissipation effect of cooling system, while the energy consumption of liquid cooling unit can be reduced, improve the service life of cooling system. Figures 4 to 12 The utility model discloses an embodiment shown in a kind of cooling system for heat dissipation of energy storage equipment, including cooling plate 100.Through the inlet 102 and outlet 103 on cooling plate 100 are set in the position of different side of cooling plate 100, to reduce the length of first flow channel 101 that inlet 102 and outlet 103 are communicated, to shorten the journey of cooling medium in turn, reduce the temperature difference of inlet 102 and outlet 103, improve the heat dissipation effect of cooling system, while the energy consumption of liquid cooling unit can be reduced, improve the service life of cooling system.

[0053] Among them, cooling plate 100 is provided with inlet 102 and outlet 103 that are communicated by first flow channel 101, and inlet 102 and outlet 103 are located at the different side of cooling plate 100 respectively, that is, inlet 102 and outlet 103 are located at the different side position of cooling plate 100 respectively, and inlet 102 and outlet 103 are communicated by several first flow channels 101, to reduce the length of first flow channel 101 that inlet 102 and outlet 103 are communicated, to shorten the journey of cooling medium in turn, reduce the temperature difference of inlet and outlet, improve the heat dissipation effect of cooling system, while the energy consumption of liquid cooling unit can be reduced, improve the service life of cooling system.

[0054] Among them, as shown in the figure, Figures 4 to 7 Cooling plate 100 can adopt rectangular plate, and cooling plate 100 has the pair of setting short side and long side, inlet 102 and outlet 103 can be located at the short side and long side perpendicular to each other on cooling plate 100, or can be located at the short side or long side oppositely arranged on cooling plate 100, to effectively shorten the journey of cooling medium by inlet 102 injection from outlet 103, reduce the temperature difference of inlet 102 and outlet 103, improve the heat dissipation effect of cooling system, while the energy consumption of liquid cooling unit is reduced, improve the service life of cooling system.

[0055] In some embodiments, when the liquid inlet 102 and the liquid outlet 103 are located on the short side and the long side of the cooling plate 100 perpendicular to each other, the first flow channel 101 can directly connect the liquid inlet 102 and the liquid outlet 103 by using a straight pipe, or the first flow channel 101 can connect the liquid inlet 102 and the liquid outlet 103 by using a pipe with a preset angle, which can be 30°, 45°, 135°, etc. Of course, the preset angle can also be 90°, that is, the first flow channel 101 adopts an L-shaped pipe to reduce the length of the first flow channel 101 connecting the liquid inlet 102 and the liquid outlet 103, and shorten the travel of the cooling medium. In addition, the first flow channel 101 can also adopt an arc-shaped elbow pipe, or a combination of a pipe with a preset angle and a straight pipe, etc., which is not limited herein.

[0056] In some embodiments, as shown in Figure 4 and Figure 5 , the liquid inlet 102 and the liquid outlet 103 can be arranged on opposite sides of the cooling plate 100, that is, the liquid inlet 102 and the liquid outlet 103 are arranged on opposite short sides or long sides of the cooling plate 100 and are connected by a plurality of first flow channels 101. Preferably, the liquid inlet 102 and the liquid outlet 103 are arranged on opposite short sides of the cooling plate 100. At the same time, in order to ensure the shortest travel of the cooling medium, the liquid inlet 102 and the liquid outlet 103 are arranged on the two short sides of the cooling plate 100, and the liquid inlet 102 and the liquid outlet 103 are coaxially arranged, that is, the liquid inlet 102 and the liquid outlet 103 are arranged opposite to each other, and each first flow channel 101 is arranged parallel to the cooling plate 100. According to the principle that the straight line between two points is the shortest, the liquid inlet 102 and the liquid outlet 103 are arranged on the two short sides of the cooling plate 100, which greatly shortens the travel of the cooling medium, and the parallel arrangement of the first flow channel 101 ensures the smooth flow of the cooling medium, reduces the energy consumption of the liquid cooling unit, and improves the service life of the cooling system. At the same time, by arranging the first flow channel 101 in a straight line, the temperature difference between the liquid inlet 102 and the liquid outlet 103 is reduced, the temperature distribution is more uniform, and the service life of the energy storage equipment is improved.

[0057] In the above embodiments, the cooling plate 100 can adopt but is not limited to a rectangular plate, and the cooling plate 100 can also adopt a square plate or a polygonal plate, in which case only the liquid inlet 102 and the liquid outlet 103 need to be arranged on different sides of the cooling plate 100.

[0058] In some embodiments, the first flow channel 101 on the cooling plate 100 can adopt a front-in and rear-out manner, as shown in Figure 4 . Of course, the first flow channel 101 on the cooling plate 100 can also adopt a right-in and left-out manner, as shown in Figure 5As shown in FIG. 1, the cooling medium is injected from the liquid inlet 102, flows through each first flow channel 101, and then flows out from the liquid outlet 103, thereby taking away the heat of the battery cell. It should be noted that "front" in the above embodiment refers to the lower part of the cooling plate 100, and "back" in the above embodiment refers to the upper part of the cooling plate 100, that is, the "front" is the injection direction of the cooling medium, and the "back" is the outflow direction of the cooling medium. Figure 4 Figure 4

[0059] In some embodiments, as shown in FIG. 2 and FIG. 3, in order to improve the spatial heat dissipation effect of the cooling system, a baffle 105 can be arranged on the cooling plate 100, and the plane where the baffle 105 is located has a non-zero angle with the plane where the cooling plate 100 is located. The angle between the plane where the baffle 105 is located and the plane where the cooling plate 100 is located can be 30°, 45°, 90°, etc., which is not limited herein. As shown in FIG. 2, the baffle 105 can be located at the middle position of the cooling plate 100, and a second flow channel 101a is arranged on the baffle 105, so that the cooling medium can flow through the second flow channel 101a on the baffle 105, thereby increasing the heat dissipation effect of the cooling plate 100 in the direction perpendicular to the plate surface. The baffle 105 can be provided with a plurality of parallel second flow channels 101a, or a second flow channel 101a with a larger width can be arranged on the baffle 105, so as to ensure a larger heat dissipation area of the baffle 105, thereby improving the spatial heat dissipation effect of the cooling system. Of course, the baffle 105 can also be arranged on one side or both sides of the cooling plate 100, and for the convenience of understanding, the baffle 105 arranged on one side of the cooling plate 100 is defined as a side plate 106. As shown in FIG. 3, the baffle 105 is arranged on both sides of the cooling plate 100, and a second flow channel 101a is arranged on the inner wall of the side plate 106. Of course, the second flow channel 101a on each side plate 106 can adopt a plurality of parallel second flow channels 101a, or a second flow channel 101a with a larger width can be arranged on each side plate 106, so as to ensure a larger heat dissipation area of the side plate 106 on both sides of the cooling plate 100, thereby improving the spatial heat dissipation effect of the cooling system. Of course, the baffle 105 and the side plate 106 can also be arranged on the cooling plate 100 at the same time, so as to arrange more heat dissipation channels and improve the spatial heat dissipation effect of the cooling system. The specific arrangement mode can be flexibly selected according to the actual application scene. Figure 6 Figure 7 Figure 6 Figure 7

[0060] The utility model embodiment further discloses a kind of energy storage equipment, including cabinet and the cooling system being arranged in cabinet, which adopts the cooling system disclosed in above embodiment, so it has all the technical effects of above cooling system, which will not be repeated here.The cabinet is provided with a plurality of battery modules, and the cooling plate 100 of the cooling system is matched with the battery module, that is, the cooling plate 100 is arranged one by one with the battery module. ​​​​​​

[0061] In some embodiments, as shown in Figures 8 to 12 The main pipe 104 can be connected between each cooling plate 100. The main pipe 104 includes an inlet main pipe 1041 connected to the liquid inlet 102 of each cooling plate 100 and an outlet main pipe 1042 connected to the liquid outlet 103 of each cooling plate 100. The cooling medium flows into the inlet main pipe 1041 and enters the first flow channel 101 of each cooling plate 100 through the liquid inlet 102, and flows out of the liquid outlet 103 of each cooling plate 100 into the outlet main pipe 1042, thereby taking away the heat of the battery cells of each battery module and achieving heat dissipation of the energy storage device.

[0062] In some embodiments, as shown in Figure 8 and Figure 9 The inlet main pipe 1041 and the outlet main pipe 1042 can be arranged in parallel on the side of the cabinet, and the angle between the first flow channel 101 of each cooling plate 100 and the main pipe 104 can be 90°, i.e. the first flow channel 101 is perpendicular to the main pipe 104. The liquid inlet 102 on each cooling plate 100 is connected to the inlet main pipe 1041, and the liquid outlet 103 on each cooling plate 100 is connected to the outlet main pipe 1042. When the cooling medium flows into the inlet main pipe 1041 and enters the first flow channel 101 of each cooling plate 100 through the liquid inlet 102, and flows out of the liquid outlet 103 of each cooling plate 100 into the outlet main pipe 1042, thereby taking away the heat of the battery cells of each battery module and achieving heat dissipation of the energy storage device.

[0063] In order to ensure the temperature uniformity between different battery modules and reduce the temperature difference between different battery modules, as shown in Figure 8 and Figure 9 The diameter of the liquid inlet 102 and the liquid outlet 103 on each cooling plate 100 connected to the inlet main pipe 1041 and the outlet main pipe 1042 can be controlled to control the flow rate of the cooling medium, thereby reducing the temperature difference between different battery modules and ensuring the safe and stable operation of the entire energy storage device.

[0064] In some embodiments, as shown in Figure 8As shown, when the liquid inlet main pipeline 1041 and the liquid outlet main pipeline 1042 are arranged in parallel along the vertical direction on the side of the cabinet, the diameters of the liquid inlet port 102 and the liquid outlet port 103 on each cooling plate 100 can be sequentially reduced along the flow direction of the liquid inlet main pipeline 1041, that is, from top to bottom, so that under the same fluid pressure, the flow rate of the cooling medium increases by reducing the diameters of the liquid inlet port 102 and the liquid outlet port 103, and under the same flow of the cooling medium, the time increases, resulting in a decrease in the overall heat dissipation speed, so that the temperature of the battery module on each cooling plate 100 is more uniform, the temperature difference between different battery modules is reduced, and the safe and stable operation of the entire energy storage equipment is ensured.

[0065] In some embodiments, as Figure 9 As shown, when the liquid inlet main pipeline 1041 and the liquid outlet main pipeline 1042 are arranged in parallel along the horizontal direction on the side of the cabinet, each cooling plate 100 is arranged in parallel along the vertical direction between the liquid inlet main pipeline 1041 and the liquid outlet main pipeline 1042. Among them, the liquid inlet port 102 on each cooling plate 100 is in communication with the liquid inlet main pipeline 1041, and the liquid outlet port 103 on each cooling plate 100 is in communication with the liquid outlet main pipeline 1042. The cooling medium flows into the liquid inlet main pipeline 1041 under the power of the liquid cooling unit, and the cooling medium slows down with longer travel and enters the first flow channel 101 of the cooling plate 100 through the liquid inlet port 102 of each cooling plate 100, and flows out from the liquid outlet port 103 of each cooling plate 100 into the liquid outlet main pipeline 1042, thereby taking away the heat of the battery cell of each layer of battery module and achieving heat dissipation of the energy storage equipment. In order to ensure the temperature uniformity between different battery modules and reduce the temperature difference between different battery modules, as Figure 9 As shown, the diameters of the liquid inlet port 102 and the liquid outlet port 103 on each cooling plate 100 can be sequentially increased along the flow direction of the liquid inlet main pipeline 1041, so that the flow of the cooling medium flowing into each cooling plate 100 along the flow direction of the liquid inlet main pipeline 1041 is sequentially increased in the same time, thereby ensuring that the flow rate of the cooling medium at the liquid inlet port 102 position of the liquid inlet main pipeline 1041 of each cooling plate 100 is equal, and thereby realizing the equal flow rate of the cooling medium of the liquid inlet port 102 and the liquid outlet port 103 on each cooling plate 100, to ensure the temperature uniformity between different battery modules.

[0066] In order to ensure the temperature uniformity between different battery modules and reduce the temperature difference between different battery modules, as Figure 10 and Figure 11As shown, when the cross-sectional area of ​​the main pipeline 104 and the first flow channel 101 on the cooling plate 100 is the same, the liquid inlet main pipeline 1041 and the liquid outlet main pipeline 1042 can also be inclinedly arranged on the side of the cabinet so that the included angle between the first flow channel 101 and the main pipeline 104 is not less than 90°. The included angle between the first flow channel 101 and the main pipeline 104 can be 120°, 135°, 145°, etc., so that the flow rate of the cooling medium at the liquid inlet 102 and the liquid outlet 103 on the cooling plate 100 at different positions on the main pipeline 104 is equal, so as to achieve temperature uniformity between different battery modules.

[0067] In some embodiments, such as Figure 10 As shown, the liquid inlet main line 1041 and the liquid outlet main line 1042 can be arranged vertically and inclined towards the center of the liquid inlet main line 1041 and the liquid outlet main line 1042 on the side of the cabinet. That is, the distance between the top of the liquid inlet main line 1041 and the liquid outlet main line 1042 gradually decreases to the distance between the bottom of the liquid inlet main line 1041 and the liquid outlet main line 1042. This ensures that the flow rate of the cooling medium at the liquid inlet 102 and the liquid outlet 103 on the cooling plate 100 located at the high and low points of the main line 104 is equal, so as to achieve temperature uniformity between different battery modules.

[0068] In some embodiments, such as Figure 11 As shown, the liquid inlet main line 1041 and the liquid outlet main line 1042 can also be arranged horizontally and inclined towards the center of the liquid inlet main line 1041 and the liquid outlet main line 1042 on the side of the cabinet. That is, the distance between the liquid inlet main line 1041 and the liquid outlet main line 1042 gradually decreases from left to right. This ensures that the cooling medium flow rate at the liquid inlet 102 position of each cooling plate 100 is equal under the power of the liquid cooling unit, thereby ensuring that the cooling medium flow rate at the liquid inlet 102 and the liquid outlet 103 on each cooling plate 100 is equal, so as to ensure the temperature uniformity between different battery modules.

[0069] In the above embodiments, the liquid inlet main line 1041 and the liquid outlet main line 1042 may also be arranged parallel to the diagonal of the side of the cabinet, or the liquid inlet main line 1041 and the liquid outlet main line 1042 may be located on both sides of the diagonal of the side of the cabinet and inclined towards the diagonal, etc., which will not be elaborated here.

[0070] To ensure temperature uniformity between different battery modules and reduce temperature differences between them, such as Figure 12 As shown, the inlet 102 and / or outlet 103 of the cooling plate 100 can also be connected to the main pipeline 104 by an arc-shaped pipeline 1043, and the curvature of each arc-shaped pipeline 1043 is different along the flow direction of the main inlet pipeline 1041.

[0071] In some embodiments, such as Figure 12 As shown, when the main inlet 104 is vertically positioned on the side of the cabinet, the liquid inlets 102 on each cooling plate 100 are connected to the main inlet 1041 via arc-shaped pipes 1043. By controlling the curvature of each arc-shaped pipe 1043, the axial angle between the liquid inlets 102 on each cooling plate 100 and the main inlet 1041 is adjusted, thereby regulating the flow rate of the liquid inlets 102 on each cooling plate 100. For example... Figure 12 As shown, the arc-shaped pipe 1043 can be rigidly connected to the liquid inlet main pipe 1041 using curved rigid pipes with different radii of curvature. By changing the curvature of the arc-shaped pipe 1043, the axial angle between the liquid inlet 102 on each cooling plate 100 and the liquid inlet main pipe 1041 can be adjusted, thereby adjusting the flow rate of the liquid inlet 102 on each cooling plate 100. This ensures that the flow rate of the cooling medium at the liquid inlet 102 on the cooling plates 100 located at high and low positions on the liquid inlet main pipe 1041 is equal, thereby achieving temperature uniformity between different battery modules. Of course, the outlet 103 on each cooling plate 100 can also be connected to the main outlet pipeline 1042 by an arc-shaped pipeline 1043. By controlling the curvature of each arc-shaped pipeline 1043, the axial angle between the outlet 103 on each cooling plate 100 and the main pipeline 104 can be adjusted, thereby adjusting the flow rate of the outlet 103 on each cooling plate 100. Alternatively, the inlet 102 and outlet 103 on each cooling plate 100 can both be connected to the main inlet pipeline 1041 and the main outlet pipeline 1042 by an arc-shaped pipeline 1043, thereby adjusting the flow rate of the inlet 102 and outlet 103 on each cooling plate 100. This will not be elaborated further in this paper.

[0072] like Figure 13 and Figure 14 As shown, the energy storage device includes multiple battery clusters, each battery cluster may include multiple battery modules, and at least one battery cluster's liquid inlet main line 1041 and the adjacent battery cluster's liquid outlet main line 1042 are located on the same side of the cabinet, that is, the battery cluster's liquid inlet main line 1041 and the adjacent battery cluster's liquid outlet main line 1042 share an adjacent cabinet side, as shown. Figure 13 As shown. It should be noted that the battery clusters used in the above example are not limited to one; there can be two, three, or more, which is not limited here.

[0073] Of course, the inlet main line 1041 and outlet main line 1042 of the same battery cluster can also be located on the same side of the cabinet, such as... Figure 14 As shown. It should be noted that the battery clusters used in the above example are not limited to one; there can be two, three, or more, which is not limited here.

[0074] It should be noted that the cooling medium in the above embodiments can adopt liquid water, oil and other fluid medium, which is not limited herein.

[0075] The utility model embodiment further discloses a kind of energy storage systems, including energy storage equipment, which uses the energy storage equipment disclosed in the above embodiment, so it has all the technical effects of the above energy storage equipment, which is not repeated herein.

[0076] The terms "first" and "second" and the like in the description and claims of the utility model and the above drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can include steps or units that are not listed.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling system for heat dissipation of an energy storage device, characterized in that, The cooling plate (100) is provided with an inlet (102) and an outlet (103), and the inlet (102) and the outlet (103) are located on the opposite sides of the cooling plate (100), respectively. The inlet (102) and the outlet (103) are coaxially arranged, and each first flow channel (101) is arranged in parallel.

2. The cooling system of claim 1, wherein, At least one partition (105) is arranged on the cooling plate (100) in the direction from the inlet (102) to the outlet (103), and the partition (105) is provided with a second flow channel (101a).

3. The cooling system of claim 2, wherein, The inlet end of the second flow channel (101a) is communicated with the inlet (102) of the cooling plate (100), and the outlet end of the second flow channel (101a) is communicated with the outlet (103) of the cooling plate (100).

4. Cooling system according to any one of claims 1-3, characterized in that The plane of the partition (105) and the plane of the cooling plate (100) have a non-zero included angle.

5. An energy storage device comprising a cabinet and a cooling system arranged in the cabinet, wherein the cooling system is the cooling system according to any one of claims 1-4. The cabinet is provided with a plurality of battery modules, and the cooling plate (100) is matched with the battery modules. Each cooling plate (100) is communicated by a main pipeline (104), and the main pipeline (104) comprises an inlet main pipeline (1041) for communicating with the inlet (102) of each cooling plate (100) and an outlet main pipeline (1042) for communicating with the outlet (103) of each cooling plate (100). The inlet (102) and / or the outlet (103) and the main pipeline (104) are connected by an arc-shaped pipeline (1043), and the curvature of each arc-shaped pipeline (1043) is different along the flow direction of the inlet main pipeline (1041).

6. The energy storage device of claim 5, wherein, The included angle between the first flow channel (101) and the main pipeline (104) is not less than 90°.

7. The energy storage device of claim 6, wherein, The included angle between the first flow channel (101) and the main pipeline (104) is 90°, and the diameters of the inlet (102) and the outlet (103) on each cooling plate (100) change in turn along the flow direction of the cooling liquid in the inlet main pipeline (1041).

8. The energy storage device of claim 6, wherein, The energy storage device comprises a plurality of battery clusters.

9. The energy storage device of claim 8, wherein, The inlet main pipeline (1041) of at least one battery cluster and the outlet main pipeline (1042) of an adjacent battery cluster are located on the same side of the cabinet, or 10. The energy storage device of claim 6, wherein, The inlet main pipeline (1041) and the outlet main pipeline (1042) of at least one battery cluster are located on the same side of the cabinet. The inlet main pipeline (1041) and the outlet main pipeline (1042) are arranged obliquely on the side of the cabinet. The energy storage device comprises the energy storage device according to any one of claims 5-11.

11. The energy storage device of claim 6, wherein, ​ 12. An energy storage system characterized by, ​

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