Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises a refrigerator; the at least one battery cluster comprises a plurality of layers of battery clusters which are arranged along the height direction of the energy storage system; the multiple cooling structures are arranged at intervals in the height direction of the energy storage system, each cooling structure corresponds to at least one layer of battery clusters, the multiple cooling structures are all connected to the refrigerator, and each cooling structure is used for cooling at least one layer of battery clusters.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage, and particularly relates to an energy storage system. BACKGROUND

[0002] As an important energy storage form in the energy system, the energy storage container is provided with a plurality of battery clusters in the energy storage container, and a forced air cooling system is used to cool the plurality of battery clusters. The forced air cooling system comprises an air conditioner and a cooling air duct, and the cooling air duct is arranged at the top of the battery cluster. Since the battery cluster closer to the air outlet of the air conditioner receives more air volume and lower temperature, the heat dissipation effect of the battery pack at the top layer of the battery cluster is better, and the battery cluster farther from the air outlet of the air conditioner receives less air volume and higher temperature, the heat dissipation effect of the battery pack at the bottom of the battery cluster is poor, so that the cooling air duct has an uneven heat dissipation effect on the battery packs at different positions of the battery cluster in the energy storage container, especially the heat dissipation effect of the battery pack at the top layer of the battery cluster and the battery pack at the bottom layer of the battery cluster has a large difference, thereby causing a large temperature difference between the battery packs at different positions in the energy storage container, and reducing the service life of the whole energy storage container. SUMMARY

[0003] The embodiment of the utility model provides a kind of energy storage system, and the technical problem that the temperature difference of the whole energy storage container is improved.

[0004] First, the embodiment of the utility model provides an energy storage system, comprising:

[0005] Refrigerator;

[0006] At least one battery cluster, the battery cluster includes a plurality of layers of battery clusters arranged along the height direction of the energy storage system;

[0007] A plurality of cooling structures are arranged at intervals along the height direction of the energy storage system, each cooling structure is provided for at least one layer of battery clusters, and a plurality of cooling structures are connected to the refrigerator. Each cooling structure is used to cool at least one layer of battery clusters.

[0008] In an embodiment, the energy storage system includes an energy storage container, the energy storage container includes a box body, the refrigerator is provided with a plurality of pipe interfaces, and a plurality of pipe interfaces are arranged along the height direction of the energy storage system. Wherein, the cooling structure is arranged as a cooling pipe, the cooling pipe is provided with a cooling pipe inlet, and the cooling pipe inlet is connected to the corresponding pipe interface;

[0009] And / or, each cooling pipe is further provided with a plurality of air outlets, each layer of battery clusters includes a plurality of battery packs, each air outlet is arranged opposite to at least one battery pack, and a plurality of air outlets are used to cool a plurality of battery packs of each layer of battery clusters.

[0010] In an embodiment, the battery cluster comprises a first end and a second end opposite to each other along the length direction of the box, the plurality of cooling pipe inlets are equidistant to the first end, or the plurality of cooling pipe ends are equidistant to the second end.

[0011] In an embodiment, the number of at least one battery cluster is set to be multiple, the same layer battery clusters in the plurality of battery clusters are arranged side by side along the length direction of the box to form a battery cluster group, the energy storage container further comprises a battery rack, and the battery cluster group is mounted on the battery rack along the length direction of the box, each cooling pipe extends along the length direction of the box and provides cooling for the plurality of battery packs of the battery cluster group.

[0012] In an embodiment, the battery rack comprises a plurality of columns extending along the height direction of the energy storage system, and each cooling pipe comprises a plurality of reinforcing pieces, each reinforcing piece being fixedly connected to a corresponding column.

[0013] In an embodiment, the cross-sectional area of the cooling pipe gradually decreases in a direction from the inlet end of the cooling pipe to the end of the cooling pipe.

[0014] In an embodiment, the cross-sectional area of the end of the cooling pipe is X, the cross-sectional area of the pipe interface of the refrigerator is X0, the length of the cooling pipe is L, and the cross-sectional area of the cooling pipe at a position n away from the cooling pipe inlet is Xn, wherein Xn and n satisfy the following relationship: X0-Xn=n*(X0-X) / L, and X0 satisfies: 2000mm 3 ≤X0≤5000mm 3 , 3000mm≤L≤8000mm, 500mm 3 ≤X≤1500mm 3 .

[0015] In an embodiment, the height or the width of the cooling pipe gradually decreases in a direction from the inlet end of the cooling pipe to the end of the cooling pipe.

[0016] In an embodiment, along the height direction of the energy storage system, the ratio of the projection area of each cooling pipe to the projection area of the corresponding battery pack gradually increases in a direction from the inlet end of the cooling pipe to the end of the cooling pipe.

[0017] In one embodiment, along the height direction of the energy storage system, the number of battery pack layers included in the battery cluster is n1, and the number of multiple cooling pipes is m1, where n1 equals m1; and / or, along the length direction of the housing, the number of battery packs included in each layer of the battery cluster is n2, and the number of air outlets included in each cooling pipe is m2, where n2 equals m2.

[0018] The beneficial effects of the embodiments of this utility model are as follows:

[0019] In embodiments of this invention, multiple cooling structures are provided in the energy storage system. These cooling structures are spaced apart along the height of the energy storage system. Each cooling structure corresponds to at least one layer of battery clusters, and all cooling structures are connected to a cooler. Each cooling structure provides cooling for at least one layer of battery clusters. Thus, the battery clusters at the top are provided with at least one cooling structure, the battery clusters at the bottom are provided with at least one cooling structure, and the battery clusters in the middle are provided with at least one cooling structure. This ensures that battery clusters at different locations are provided with independent cooling structures, thereby achieving temperature balance among battery clusters at different locations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional schematic diagram of multiple battery clusters and multiple cooling structures of an energy storage system provided in an embodiment of the present invention, from one perspective.

[0022] Figure 2 This is a three-dimensional schematic diagram of the cooling pipe provided in an embodiment of this utility model;

[0023] Figure 3 This is another perspective view of the battery rack and multiple cooling structures of the energy storage system provided by the embodiment of this utility model.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0025] Figure 5 This is a three-dimensional schematic diagram of the battery rack and multiple cooling structures of the energy storage system provided in an embodiment of this utility model from one perspective.

[0026] Icon labels:

[0027] 100. Energy storage system

[0028] 1. battery cluster; 11. single layer battery cluster; 12. battery pack; 13. battery cluster group; 141. first end; 142. second end; 2. chiller; 21. pipe interface

[0029] 3. cooling structure; 31. cooling pipe; 32. cooling pipe inlet; 321. cooling pipe inlet end; 322. end; 33. air outlet; 34. top plate; 35. bottom plate; 36. side plate; 361. first side plate; 362. second side plate; 37. end plate; 38. reinforcing sheet

[0030] 4. battery rack; 41. column; 42. beam; 43. side beam; 441. first column; 442. second column DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used to refer to the up and down of the device in the actual use or working state, and the specific is the direction of the drawing in the drawing. And 'inner' and 'outer' are used in relation to the outline of the device.

[0032] As an important energy storage form in the energy system, the energy storage container has the advantages of high capacity, high reliability, high flexibility and strong environmental adaptability. The heat dissipation system in the energy storage container has an important influence on the use performance of the energy storage container.

[0033] In the related art, the heat dissipation system of the energy storage container adopts an air cooling system, which includes an air conditioner and a cooling air duct. The cooling air duct is arranged at the top of the battery cluster of the energy storage container. Since the battery cluster closer to the air outlet of the air conditioner receives more air flow and lower temperature, the heat dissipation effect of the battery cluster group at the top of the battery cluster is better. The battery cluster farther from the air outlet of the air conditioner receives less air flow and higher temperature, and the heat dissipation effect of the battery cluster group at the bottom of the battery cluster is poor. Therefore, the heat dissipation effects of the battery packs at different positions of the battery cluster of the energy storage container with the cooling air duct are not balanced, especially the heat dissipation effects of the battery packs at the top and bottom of the battery cluster are quite different, resulting in a large temperature difference between the battery packs at different positions in the energy storage container, and thus reducing the service life of the energy storage container as a whole.

[0034] Embodiments of the present application provide an improved cooling structure in the energy storage system container, so that the temperature difference between the battery clusters at different positions in the energy storage container is small, and thus the service life of the energy storage container is improved.

[0035] As shown in Figure 1 The energy storage system 100 includes a refrigeration device 2 and an energy storage container 10. The energy storage container 10 includes a box body (not shown in the figure), at least one battery cluster 1, and a plurality of cooling structures 3.

[0036] The refrigeration device 2 can be an air conditioner for providing cooling air. Alternatively, the refrigeration device 2 can be a liquid cooling unit for providing cooling liquid. Alternatively, the refrigeration device 2 can be a cooling device for providing phase-change refrigerant. Taking the air conditioner as an example, the air conditioner can be a large vertical air conditioner, which can be installed inside the box body of the energy storage container, or can be arranged outside the box body of the energy storage container. In alternative embodiments, the air conditioner can be a small hanging air conditioner, which is installed on the inner side of the box body of the energy storage container.

[0037] The at least one battery cluster 1 is arranged in the box body. The battery cluster 1 includes a plurality of layers of battery clusters arranged in the height direction of the box body, which is arranged in the Z direction as shown. Figure 1 Each layer of battery cluster includes a plurality of battery packs 12 arranged in the length direction of the box body, which is arranged in the X direction as shown. Figure 1 The number of at least one battery cluster can be multiple. The multiple battery clusters are arranged side by side in the length direction of the box body. Each layer of the multiple battery clusters is arranged side by side in the length direction of the box body to form a battery cluster group 13.

[0038] The plurality of cooling structures 3 are arranged in the box body. The plurality of cooling structures 3 are arranged at intervals in the height direction of the box body. Each cooling structure 3 corresponds to at least one layer of battery cluster 11. Each cooling structure is provided for at least one layer of battery cluster.

[0039] By arranging multiple cooling structures 3 inside the box, the multiple cooling structures 3 are arranged at intervals along the height direction of the box, each cooling structure 3 is arranged corresponding to at least one layer of battery clusters 11, and the multiple cooling structures 3 are all connected to the refrigerating device 2, each cooling structure 3 cools at least one layer of battery clusters 11, so that the battery cluster at the top is cooled by at least one cooling structure 3, the battery cluster at the bottom is cooled by at least one cooling structure 3, and the battery cluster in the middle is cooled by at least one cooling structure 3, so that the battery clusters at different positions are all arranged with independent cooling structures 3 for cooling, thereby balancing the temperature between the battery clusters at different positions.

[0040] When the refrigerating device 2 is arranged as an air conditioner, the cooling structure 3 is arranged as a cooling air duct. When the refrigerating device 2 is arranged as a liquid cooling unit, the cooling structure 3 is arranged as a liquid cooling pipe.

[0041] With reference to Figures 1 to 3 , the cooling structure 3 is arranged as a cooling pipe 31, each cooling pipe 31 is provided with a cooling pipe inlet 32, and a plurality of pipe interfaces 21 are arranged on the refrigerating device 2, the cooling pipe inlet 32 of each cooling pipe 31 is connected to a pipe interface 21, so that the multiple cooling pipes 31 have the same refrigeration effect, thereby enabling the multiple cooling pipes 31 arranged corresponding to different positions of the battery cluster 1 to provide the same refrigeration effect.

[0042] Compared with the related art, the cooling pipe inlets 32 of the multiple cooling pipes 31 are respectively connected to the main pipe, and since the cooling air or cooling liquid provided by the refrigerating device gradually weakens in the direction away from the pipe interface of the refrigerating device during the flow in the main pipe, the cooling effect of the cooling pipe connected to different positions of the main pipe has a temperature difference from the cold source, thereby affecting the temperature uniformity between the multiple cooling pipes. In the embodiment of the present application, the cooling pipe inlets 32 of the multiple cooling pipes 31 are all connected to the pipe interfaces 21 of the refrigerating device 2, so that the temperature of the cold source at the inlets of the multiple cooling pipes corresponding to the battery clusters at different positions is the same, and the temperature uniformity of the refrigeration effect of the multiple cooling pipes is improved.

[0043] Among them, the sealing connection structure between the cooling pipe 31 and the pipe interface 21 of the refrigerating device 2 can be a threaded connection or a plug-in connection.

[0044] With reference to Figures 1 to 3, the battery cluster 1 comprises a first end 141 and a second end 142 opposite to each other along the length direction of the box body, each cooling duct 31 comprises an inlet end 321 and a terminal end 322 opposite to each other along the length direction of the box body, wherein the inlet end 321 of the cooling duct 31 is open and forms the cooling duct inlet 32, and the terminal end 322 of the cooling duct 31 is closed, so that the cooling air or cooling liquid flows in the inner cavity of the cooling duct 31. The distance between the plurality of inlet ends 321 of the plurality of cooling ducts 31 and the first end 141 of the battery cluster 1 is the same, and the distance between the plurality of terminal ends 322 of the plurality of cooling ducts 31 and the second end 142 of the battery cluster 1 is the same, so that the cooling duct 31 can provide the same length of cooling flow channel corresponding to each layer of the battery cluster, and the distance between the cooling duct inlet 32 of the plurality of cooling ducts 31 and the first end 141 and the second end 142 of the battery cluster 1 is the same, thereby the cooling effect of the plurality of cooling ducts corresponding to each layer of the battery cluster is the same, thereby improving the temperature uniformity between each layer of the battery cluster.

[0045] With reference to Figures 1 to 3 , the refrigerator 2 is provided as an air conditioner, the cooling duct 31 is provided as a cooling air duct, each cooling duct 31 is provided with a plurality of air outlets 33, the plurality of air outlets 33 are arranged opposite to the battery cluster 1, and each layer of the battery cluster 1 is provided with a plurality of air inlets (not shown in the figure) corresponding to the plurality of battery packs 12, and the air inlets of each battery pack 12 are arranged opposite to the air outlets 33 of the cooling duct 31, so that the cooling air flowing out of the air outlets 33 of the cooling duct 31 can cool the corresponding battery pack 12.

[0046] By arranging a plurality of air outlets 33 on each cooling duct 31 opposite to the side plate 36 where the battery cluster 1 is located, each air outlet 33 is arranged opposite to at least one battery pack, so that each layer of the battery cluster 1 can be sufficiently cooled, and the cooling duct 31 can provide substantially the same cooling effect for the plurality of battery packs 12 of the same layer of the battery cluster 1, thereby preventing temperature difference between the battery packs 12 at different positions of the same layer of the battery cluster 1.

[0047] With reference to Figure 1 and Figure 2 , the number of at least one battery cluster 1 is set to be multiple, and the plurality of battery clusters 1 are arranged at intervals along the length direction X of the box body, and each layer of the plurality of battery clusters 1 is arranged side by side along the length direction of the box body to form a battery cluster group 13. For example, five battery clusters are arranged inside the box body, each layer of a single battery cluster comprises two battery packs, and the five battery clusters are arranged side by side to form a battery cluster group of ten battery packs.

[0048] As Figures 1 to 5As shown, the energy storage container further comprises a battery rack 4 arranged inside the container body, the battery rack 4 comprises a plurality of upright columns 41, a plurality of cross beams 42 and a plurality of side beams 43, wherein the upright columns 41 extend along the height direction of the container body, the cross beams 42 extend along the length direction of the container body, and the side beams 43 extend along the width direction of the container body, the upright columns 41, the cross beams 42 and the side beams 43 are arranged perpendicularly to each other, and the plurality of upright columns 41, the plurality of cross beams 42 and the plurality of side beams 43 combine to form a plurality of battery cavities, each of which is used to accommodate a battery pack, and the battery cluster group 13 is mounted on the battery rack 4 along the length direction of the container body. The plurality of upright columns 41 comprises a first upright column 441 defining one end of the battery rack 4 and a second upright column 442 defining the other end of the battery rack 4, and the cooling pipe inlet end 321 is located on the side of the first upright column 441 away from the second upright column 442, and the end fixing portion 322 of the cooling pipe 31 is fixed on the second upright column 442. The length of the cooling pipe 31 extending along the length direction of the container body is greater than the length of the battery rack 4 extending along the length direction of the container body, so that the cooling pipe 31 can provide cooling effect for all battery packs of the single-layer battery cluster group, thereby improving the temperature uniformity between the plurality of battery clusters and simplifying the structure of the cooling pipe.

[0049] In the embodiment of the present application, the plurality of battery clusters are arranged side by side on the battery rack, and the length of one cooling pipe extending along the length direction of the container body is greater than the length of the battery rack extending along the length direction of the container body, so that one cooling pipe can provide cooling effect for the battery cluster group formed by the plurality of battery clusters, thereby effectively simplifying the structure of the cooling pipe inside the energy storage container and improving the uniformity of the temperature difference between the battery clusters.

[0050] For example, the plurality of battery clusters comprise a first battery cluster, a second battery cluster, a third battery cluster, a fourth battery cluster and a fifth battery cluster arranged side by side, wherein the top layer battery cluster, the middle battery cluster and the bottom layer battery cluster of the first battery cluster are the same distance from the cooling pipe inlet 32, the top layer battery cluster, the middle battery cluster and the bottom layer battery cluster of the second battery cluster are the same distance from the cooling pipe inlet 32, the top layer battery cluster, the middle battery cluster and the bottom layer battery cluster of the third battery cluster are the same distance from the cooling pipe inlet 32, the top layer battery cluster, the middle battery cluster and the bottom layer battery cluster of the fourth battery cluster are the same distance from the cooling pipe inlet 32, and the top layer battery cluster, the middle battery cluster and the bottom layer battery cluster of the fifth battery cluster are the same distance from the cooling pipe inlet 32, so that the cooling effect inside each battery cluster is balanced.

[0051] With reference to the foregoing description, the energy storage container further comprises a cooling pipe 31 arranged inside the container body, the cooling pipe 31 comprises a cooling pipe inlet end 321 and an end fixing portion 322, the cooling pipe inlet end 321 is arranged on one side of the container body, and the end fixing portion 322 is arranged on the other side of the container body, the cooling pipe 31 is arranged to extend along the length direction of the container body, and the cooling pipe 31 is arranged to provide cooling effect for the plurality of battery clusters arranged inside the container body. Figures 2 to 4The cooling pipe 31 comprises a top plate 34, a bottom plate 35, two side plates 36 connected between the top plate 34 and the bottom plate 35, and an end plate 37 connected to the two side plates 36. The two side plates 36 comprise a first side plate 361 and a second side plate 362. The first side plate 361 is arranged close to the battery cluster 1. A plurality of air outlets 33 are arranged on the first side plate 361. The end plate 37 is arranged at the end 322 of the cooling pipe 31 and used to seal the cooling pipe 31. Two reinforcing plates 38 are arranged on the second side plate 362 of the cooling pipe 31. The two reinforcing plates 38 are arranged at two ends of the second side plate 362 respectively. The reinforcing plates 38 are arranged protruding relative to the second side plate 362. The two reinforcing plates 38 arranged at opposite ends of the second side plate 362 are connected to the same vertical column 41 of the battery rack 4. The reinforcing plates 38 and the vertical column 41 of the battery rack 4 can be connected by welding.

[0052] The number of the reinforcing plates 38 arranged at the same side of the second side plate 362 of the cooling pipe 31 is equal to twice the number of the battery clusters 1. That is, two reinforcing plates 38 are arranged at the same side of the second side plate 362 of the cooling pipe 31 corresponding to each battery cluster 1. The two reinforcing plates 38 are fixed to the vertical columns 41 at the two ends of each battery cluster 1. Thus, the cooling pipe 31 is fixed relative to each battery cluster 1. The cooling pipe 31 can provide stable cooling effect for the plurality of battery clusters 1.

[0053] Continuing to refer to Figure 3 and Figure 5 The projection area of the cooling pipe 31 in the height direction of the box body gradually decreases along the direction away from the cooling pipe inlet 32. The height of the internal air duct of the cooling pipe 31 gradually decreases along the direction away from the cooling pipe inlet 32. It can be understood that the farther the cooling air in the cooling pipe 31 is from the cooling pipe inlet 32, the higher the temperature of the cooling air in the cooling pipe 31. By arranging the height-variable air duct in the cooling pipe 31, the height of the internal air duct of the cooling pipe 31 at the position far away from the cooling pipe inlet 32 is smaller. In the case that the width of the cooling pipe 31 remains unchanged, the smaller the height of the cooling pipe 31, the smaller the cross-sectional area of the cooling pipe 31. Thus, the flow of the cooling air is increased, the cooling speed at the position far away from the cooling pipe inlet 32 is enhanced, and the problem of uneven cooling effect of the same layer of battery cluster groups caused by sharing the same cooling pipe 31 is improved. Alternatively, the width of the internal air duct of the cooling pipe 31 gradually decreases along the direction away from the cooling pipe inlet 32. In the case that the height of the cooling pipe 31 remains unchanged, or the height of the cooling pipe 31 is reduced synchronously, the smaller the width of the internal air duct of the cooling pipe 31, the smaller the cross-sectional area of the cooling pipe 31. The height direction of the cooling pipe 31 is the same as the z direction in Figure 1 The width direction of the cooling pipe 31 is the same as the width direction of the box body.

[0054] In some embodiments, the cross-sectional area of the cooling pipe 31 gradually decreases in a direction from the cooling pipe inlet end 321 to the end 322 of the cooling pipe 31.

[0055] In some embodiments, the cross-sectional area of the end 322 of the cooling pipe 31 is X, the cross-sectional area of the pipe interface 21 of the refrigerator 2 is X0, the length of the cooling pipe 31 is L, and the cross-sectional area of the cooling pipe 31 at a distance n from the cooling pipe inlet 32 is Xn, wherein Xn and n satisfy the following relationship: X0-Xn=n*(X0-X) / L, wherein X0 satisfies: 2000mm 3 ≤X0≤5000mm 3 , 3000mm≤L≤8000mm, 500mm 3 ≤X≤1500mm 3 .

[0056] In specific implementations, the cross-sectional area X0 of the pipe interface 21 of the refrigerator 2 can be any value between 2000mm 3 and 5000mm 3 , such as 2000mm 3 , 2500mm 3 , 3000mm 3 , 3500mm 3 , 4000mm 3 , 4500mm 3 , 5000mm 3 , or a value between any two of the above values, or a range between any two of the above values.

[0057] In specific implementations, the length of the cooling pipe 31 can be any value between 3000mm and 8000mm, such as 3000mm, 35000mm, 4000mm, 4500mm, 5000mm, 5500mm, 6000mm, 6500mm, 7000mm, 7500mm, 8000mm, or a value between any two of the above values, or a range between any two of the above values.

[0058] In specific implementations, the cross-sectional area X of the end 322 of the cooling pipe 31 can be 500mm 3 , 600mm 3 , 700mm 3 , 800mm 3 , 900mm 3 , 1000mm 3 , or a value between any two of the above values, or a range between any two of the above values.

[0059] In a specific embodiment, as shown in Figure 2 the top plate 34 and the bottom plate 35 of the cooling duct 31 are arranged at an angle, and the distance between the top plate 34 and the bottom plate 35 gradually decreases in the direction away from the cooling duct inlet 32, thereby enhancing the cooling speed of the rear-end cooling duct to improve the cooling efficiency.

[0060] In a specific embodiment, the cooling duct 31 includes a plurality of air outlets 33, and the cross-sectional areas of the plurality of air outlets 33 are the same, while the width of the cooling duct 31 gradually decreases in the direction away from the cooling duct inlet 32, so that the battery packs corresponding to the same battery cluster group 13 can obtain the same cooling effect, thereby improving the cooling effect of the battery packs at different positions of the same battery cluster group.

[0061] Continuing to refer to Figure 3 and Figure 5 , along the height direction of the container, the number of layers of battery packs contained in the battery cluster 1 is n1, and the number of cooling ducts 31 is m1, where n1 is equal to m1. By arranging one cooling duct 31 at each layer of the battery cluster, the battery cluster 1 at each layer can obtain the same cooling effect, thereby sufficiently reducing the temperature difference between the battery clusters at different layers.

[0062] Continuing to refer to Figure 3 and Figure 5 , along the length direction of the container, the number of battery packs contained in each battery cluster group 13 is n2, and the number of air outlets 33 contained in each cooling duct 31 is m2, where n2 is equal to m2. By arranging one air outlet 33 at each battery pack of each layer of the battery cluster, each battery pack of each layer of the battery cluster can be cooled, thereby sufficiently reducing the temperature difference between the battery packs at different positions of the same layer of the battery cluster.

[0063] In some embodiments, the temperature or air volume of the plurality of air outlets 33 of the cooling duct 31 is arranged to be independently adjustable, so that the battery cluster can be adjusted according to the actual temperature of the battery packs at different positions, for example, if the temperature of one of the battery packs of the battery cluster is relatively high, the temperature of the air outlet corresponding to the battery pack can be reduced or the air volume can be increased, thereby increasing the cooling rate of the cooling duct to the battery pack. For example, if the temperature of another battery pack of the battery cluster is relatively low, the temperature of the air outlet corresponding to the battery pack can be increased or the air volume can be reduced, or the air outlet corresponding to the battery pack can be closed, thereby reducing the cooling efficiency of the cooling duct to the battery pack. By adjusting the actual temperature of the battery packs at different positions of the battery cluster, the temperature difference between the battery packs at different positions of the battery cluster can be reduced, and the service life of the energy storage container can be increased.

[0064] In another embodiment of the present application, a method for regulating temperature of an energy storage system is also provided. The energy storage system includes a chiller and an energy storage container. The energy storage container includes a container body, at least one battery cluster, and a plurality of cooling structures. The at least one battery cluster and the plurality of cooling structures are disposed in the container body. The at least one battery cluster includes a plurality of battery clusters arranged along a height direction of the container body. The plurality of cooling structures are arranged along the height direction of the container body. Each cooling structure corresponds to at least one battery cluster. Each cooling structure includes a plurality of air outlets. The plurality of air outlets correspond to a plurality of battery packs of the same battery cluster. The method for regulating temperature of the energy storage system includes:

[0065] obtaining temperatures of the battery packs of the battery clusters of different layers, determining a layer number of a battery cluster in which a battery pack with the highest temperature is located, and controlling the flow rate of the air outlets of the cooling duct corresponding to the battery cluster to increase or controlling the temperature of the air outlets of the cooling duct corresponding to the battery cluster to decrease, so as to increase the cooling rate of the air outlets of the cooling duct corresponding to the battery cluster.

[0066] obtaining temperatures of the battery packs of the battery clusters of different layers, determining a layer number of a battery cluster in which a battery pack with the lowest temperature is located, and controlling the flow rate of the air outlets of the cooling duct corresponding to the battery cluster to decrease or controlling the temperature of the air outlets of the cooling duct corresponding to the battery cluster to increase, or controlling the air outlets of the cooling duct corresponding to the battery cluster to be closed, so as to decrease the cooling rate of the air outlets of the cooling duct corresponding to the battery cluster.

[0067] obtaining temperatures of different battery packs of the same battery cluster, determining a position of a battery pack with the highest temperature, and controlling the flow rate of the air outlet of the cooling duct corresponding to the battery pack with the highest temperature to increase or controlling the temperature of the air outlet of the cooling duct corresponding to the battery pack with the highest temperature to decrease, so as to increase the cooling rate of the air outlet of the cooling duct corresponding to the battery pack.

[0068] obtaining temperatures of different battery packs of the same battery cluster, determining a position of a battery pack with the lowest temperature, and controlling the flow rate of the air outlet of the cooling duct corresponding to the battery pack with the lowest temperature to increase or controlling the temperature of the air outlet of the cooling duct corresponding to the battery pack with the lowest temperature to increase, or controlling the air outlet of the cooling duct corresponding to the battery pack with the lowest temperature to be closed, so as to decrease the cooling rate of the air outlet of the cooling duct corresponding to the battery pack.

[0069] In some embodiments, the air outlet of the cooling duct is provided with a valve. The opening and closing of the air outlet of the cooling duct are controlled by controlling the opening and closing of the valve.

[0070] In some embodiments, the air outlet of the cooling duct is provided with a flow regulating valve. The air volume of the air outlet of the cooling duct is controlled by controlling the opening degree of the flow regulating valve of the air outlet.

[0071] In some embodiments, a flow regulating valve is provided at each cooling duct inlet, and the air volume of the plurality of air outlets of the cooling duct is controlled by controlling the flow regulating valves at the cooling duct inlets.

[0072] In some embodiments, the temperature at different duct interfaces of the refrigerator is adjustable, and the temperature of the plurality of air outlets of the cooling duct is adjusted by controlling the temperature at the different duct interfaces of the refrigerator.

[0073] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been set forth in this paper by applying specific examples, the above embodiment explanation is only for helping understanding the method of the utility model and its core thought; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An energy storage system, characterized in that, include: Refrigerator; At least one battery cluster, the battery cluster comprising multiple layers of battery clusters arranged along the height direction of the energy storage system; Multiple cooling structures are spaced apart along the height direction of the energy storage system. Each cooling structure corresponds to at least one layer of the battery cluster. All cooling structures are connected to the cooler. Each cooling structure is used to cool at least one layer of the battery cluster.

2. The energy storage system according to claim 1, characterized in that, The energy storage system includes an energy storage container, the energy storage container includes a body, the cooler is provided with multiple pipe interfaces, the multiple pipe interfaces are arranged along the height direction of the energy storage system; wherein, the cooling structure is configured as a cooling pipe, the cooling pipe is provided with a cooling pipe inlet, and the cooling pipe inlet is connected to the corresponding pipe interface; And / or, each of the cooling pipes is further provided with multiple air outlets, each layer of the battery cluster includes multiple battery packs, each air outlet is disposed opposite to at least one of the battery packs, and the multiple air outlets are used to cool the multiple battery packs of each layer of the battery cluster.

3. The energy storage system according to claim 2, characterized in that, The battery cluster includes a first end and a second end opposite each other along the length of the housing, and the inlets of the plurality of cooling pipes are at the same distance from the first end, or the ends of the plurality of cooling pipes are at the same distance from the second end.

4. The energy storage system according to claim 2, characterized in that, The number of at least one battery cluster is set to multiple, and the same layer of battery clusters in the multiple battery clusters are arranged side by side along the length direction of the container to form a battery cluster group. The energy storage container also includes a battery rack, and the battery cluster group is installed on the battery rack along the length direction of the container. Each of the cooling pipes extends along the length direction of the container and provides cooling for the multiple battery packs of the battery cluster group.

5. The energy storage system according to claim 4, characterized in that, The battery rack includes multiple columns extending along the height direction of the energy storage system, and each cooling pipe includes multiple reinforcing plates, each of which is fixedly connected to a corresponding column.

6. The energy storage system according to claim 2, characterized in that, The cross-sectional area of ​​the cooling pipe gradually decreases from the inlet end to the end end of the cooling pipe.

7. The energy storage system according to claim 6, characterized in that, The cross-sectional area of ​​the end of the cooling pipe is X, the cross-sectional area of ​​the pipe interface of the cooler is X0, the length of the cooling pipe is L, and the cross-sectional area of ​​the cooling pipe at a distance n from the cooling pipe inlet is Xn, where Xn and n satisfy the following relationship: X0-Xn=n*(X0-X) / L, where X0 satisfies: 2000mm 3 ≤X0≤5000mm 3 ,3000mm≤L≤8000mm,500mm 3 ≤X≤1500mm 3 .

8. The energy storage system according to claim 6, characterized in that, The height or width of the cooling pipe gradually decreases from the inlet end to the end end of the cooling pipe.

9. The energy storage system according to claim 6, characterized in that, Along the height direction of the energy storage system, the ratio of the projected area of ​​the air outlet of each cooling pipe in the corresponding battery pack to the projected area of ​​the cooling pipe in the corresponding battery pack gradually increases in the direction from the inlet end of the cooling pipe to the end end of the cooling pipe.

10. The energy storage system according to claim 4 or 5, characterized in that, Along the height direction of the energy storage system, the battery cluster includes n1 layers of battery packs and m1 multiple cooling pipes, where n1 equals m1; And / or, along the length of the housing, the number of battery packs included in each layer of the battery cluster is n2, and the number of air outlets included in each cooling pipe is m2, where n2 equals m2.

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