Cooling pipeline, cooling module and energy storage system

Abstract

The utility model provides a cooling pipeline, a cooling module and an energy storage system, and the energy storage system comprises a battery cluster group which comprises a plurality of battery clusters; the refrigerator comprises a pipeline connector; the cooling pipeline comprises a main pipeline and an auxiliary pipeline, the main pipeline is provided with a main cavity, the main cavity is communicated with the pipeline connector, the cavity wall of the main cavity is provided with a plurality of main pipeline outlets, the auxiliary pipeline is provided with an auxiliary cavity, the auxiliary cavity is communicated with the pipeline connector, and the cavity wall of the auxiliary cavity is provided with an opening; wherein the plurality of battery clusters comprise a front battery cluster and a rear battery cluster which are arranged along the flowing direction of the cooling medium of the main pipeline, and the plurality of main pipeline outlets are used for cooling the front battery cluster and the rear battery cluster; and the opening is communicated with the main cavity and corresponds to the outlet of the main pipeline corresponding to the rear battery cluster.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a cooling pipe, a cooling module, and an energy storage system. Background Technology

[0002] As an important form of energy storage in energy systems, energy storage containers house multiple battery clusters, which are cooled by an air-cooling system. This system includes air conditioning and cooling pipes connected to the air conditioning vents. Essentially, battery clusters closer to the vents receive more airflow and thus better cooling, while those farther away receive less airflow and thus poorer cooling. This uneven cooling effect leads to significant differences in the overall cooling performance of the container, resulting in large temperature variations among the individual batteries and ultimately reducing the overall lifespan of the energy storage system. Utility Model Content

[0003] The embodiments of this utility model provide a cooling pipe, a cooling module, and an energy storage system, which can improve the technical problem of uneven cooling effect of energy storage containers.

[0004] In a first aspect, embodiments of the present invention provide an energy storage system, comprising:

[0005] Battery clusters, comprising multiple battery clusters;

[0006] Refrigerator, including pipe connections; and

[0007] A cooling pipe includes a main pipe and an auxiliary pipe. The main pipe has a main cavity that is connected to the pipe interface. The main cavity has multiple main pipe outlets on its cavity wall. The auxiliary pipe has an auxiliary cavity that is connected to the pipe interface. The auxiliary cavity has an opening on its cavity wall.

[0008] The plurality of battery clusters include a front battery cluster and a rear battery cluster arranged along the flow direction of the cooling medium in the main pipe. The plurality of main pipe outlets are used to cool the front battery cluster and the rear battery cluster. The openings are connected to the main cavity and correspond to the main pipe outlets corresponding to the rear battery clusters.

[0009] In one embodiment, the plurality of battery clusters further includes a middle battery cluster located between the front battery cluster and the rear battery cluster, and the plurality of main pipe outlets are used to cool the front battery cluster, the middle battery cluster and the rear battery cluster, wherein the cross-sectional area of ​​the plurality of main pipe outlets is increased in the flow direction of the cooling medium in the main pipes.

[0010] In one embodiment, the ratio of the cross-sectional areas of two adjacent outlets of the main pipe in the direction of flow of the cooling medium in the main pipe ranges from 1.1 to 1.5.

[0011] In one embodiment, the cavity wall of the auxiliary cavity is further provided with a plurality of communication ports, which are used to connect the main cavity to connect the plurality of main pipe outlets corresponding to the central battery cluster.

[0012] In one embodiment, the cross-sectional area of ​​the plurality of connecting ports is increased in the flow direction of the cooling medium in the auxiliary pipe.

[0013] In one embodiment, the ratio of the cross-sectional areas of two adjacent connecting ports in the flow direction of the cooling medium in the auxiliary pipe ranges from 1.1 to 2.

[0014] In one embodiment, the auxiliary pipe is disposed within the main cavity, and the opening is disposed at the end of the auxiliary pipe.

[0015] In one embodiment, the ratio of the length of the auxiliary pipe to the length of the main cavity is not less than 2 / 3 and not greater than 5 / 6.

[0016] In one embodiment, the main pipe includes two main pipe side plates and a top plate and a bottom plate connected between the two main pipe side plates. The auxiliary pipe includes two auxiliary pipe side plates, which are spaced apart between the two main pipe side plates. The top of the two auxiliary pipe side plates is connected to the top plate, and the bottom of the two auxiliary pipe side plates is connected to the bottom plate.

[0017] Secondly, embodiments of this utility model provide a cooling pipe for an energy storage system, the cooling pipe including the cooling pipe of the energy storage system described above.

[0018] Thirdly, embodiments of this utility model provide a cooling module for an energy storage system, the cooling module including the cooling pipes and cooler of the energy storage system described above.

[0019] The beneficial effects of the embodiments of this utility model are as follows:

[0020] In an embodiment of this utility model, the cooling pipes are configured as main pipes and auxiliary pipes. The main cavity of the main pipe and the auxiliary cavity of the auxiliary pipe are both connected to the pipe interface of the cooler. The opening of the auxiliary cavity of the auxiliary pipe is connected to the main cavity of the main pipe and corresponds to the multiple main pipe outlets of the rear battery cluster. The front battery clusters of the battery cluster group are cooled through the main pipes, and the rear battery clusters of the battery cluster group are cooled through the main pipes and auxiliary pipes. This makes the cooling effect of the main pipes on the front battery clusters basically the same as the cooling effect of the main pipes and auxiliary pipes on the rear battery clusters, thereby reducing the difference in heat dissipation effect between the multiple battery clusters of the battery cluster group. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a perspective view of an energy storage system provided in one embodiment of the present invention;

[0023] Figure 2 This is a three-dimensional schematic diagram of a viewing cooling module provided in one embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of another perspective cooling module provided in one embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of a cooling pipe provided in one embodiment of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the cooling pipe after the top cover has been removed, according to one embodiment of the present invention.

[0027] Icon labels:

[0028] 100. Energy storage system;

[0029] 1. Battery cluster; 10. Battery cluster; 101. Front battery cluster; 102. Middle battery cluster; 103. Rear battery cluster; 111. Top surface; 112. Bottom surface; 113. Side surface; 12. Battery pack; 13. Air inlet;

[0030] 2. Refrigerator; 21. Pipe joint;

[0031] 3. Cooling pipe; 31. Main pipe; 311. Main pipe inlet; 312. Main cavity; 3121. First main cavity; 3122. Second main cavity; 313. Outlet; 3131. First main pipe outlet; 3132. Second main pipe outlet; 313a. First outlet; 313b. Second outlet; 32. Auxiliary pipe; 321. Auxiliary pipe inlet; 322. Auxiliary cavity; 323. Inlet end; 324. End end; 325. Opening; 33. Main pipe side plate; 331. First main pipe side plate; 332. Second main pipe side plate; 34. Auxiliary pipe side plate; 341. First auxiliary pipe side plate; 342. Second auxiliary pipe side plate; 35. Top plate; 36. Bottom plate; 371. First connecting port; 372. Second connecting port; 37a. First through hole; 37b. Second through hole; Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0033] As an important form of energy storage in the energy system, energy storage containers have advantages such as high capacity, high reliability, high flexibility, and strong environmental adaptability. The heat dissipation system in the energy storage container has a significant impact on its performance.

[0034] In related technologies, battery clusters are installed inside energy storage containers. Each battery cluster consists of multiple battery clusters arranged side-by-side, and a wind-cooling system is used to dissipate heat from these clusters. The wind-cooling system includes air conditioning and cooling pipes. The cooling pipes are connected to the air conditioning vents. It can be understood that the closer the cooling pipe vent is to the air conditioning vent, the greater the airflow provided to the corresponding battery cluster, resulting in better heat dissipation. Conversely, the farther the cooling pipe vent is from the air conditioning vent, the less airflow is provided to the corresponding battery cluster, resulting in poorer heat dissipation. This leads to varying cooling effects on battery clusters at different locations, resulting in significant differences in the heat dissipation of the battery clusters. This, in turn, affects the overall heat dissipation of the energy storage container, causing large temperature differences among the individual batteries within the energy storage system, and ultimately reducing the overall lifespan of the energy storage system.

[0035] The embodiments of this application provide an energy storage system that improves the cooling pipe structure inside the energy storage container to provide essentially the same cooling effect to battery clusters at different locations from the air conditioning vent, thereby improving the overall temperature uniformity of the battery clusters.

[0036] refer to Figures 1 to 3 The embodiments of this application provide an energy storage system 100, which includes a battery cluster housing (not shown in the figure), a battery cluster group 1, a cooler 2, a cooling pipe 3, and a battery rack.

[0037] The battery cluster housing is constructed in the form of a container. The battery cluster group 1, cooling pipe 3 and battery rack are all located inside the battery cluster housing. Depending on the number of battery clusters contained inside the battery cluster housing, the battery cluster housing can be equipped with multiple cabinet doors, and the multiple cabinet doors correspond to the different battery cluster settings of the battery cluster group 1.

[0038] Battery cluster 1 includes multiple battery clusters 10 arranged side-by-side along the length of the energy storage system, the length of which is defined as the length of the battery cluster housing. The length of the energy storage system is as follows: Figure 1 The x-direction is shown. Each battery cluster 10 includes multiple battery packs arranged side-by-side along the height direction of the energy storage system. The number of batteries in each battery pack can be one or more, wherein the height direction of the energy storage system is set as the height direction of the battery cluster housing, as shown in the figure. Figure 1The Z-direction is shown. Each battery pack includes a battery pack housing and multiple battery modules disposed inside the battery pack housing. The multiple battery modules are arranged side by side along the length direction x or width direction y of the energy storage system. The battery cluster has a top surface 111 and a bottom surface 112 opposite each other along the height direction Z of the energy storage system, as well as multiple side surfaces 113, including opposite front and rear side surfaces, and opposite left and right side surfaces. The battery pack housing of each battery pack is provided with multiple air inlets 13, which typically correspond to the front and / or rear side surfaces of the battery cluster. The cooling medium enters the battery pack housing through the air inlets 13 and flows rapidly, thereby facilitating the cooling of each battery module inside the battery pack.

[0039] Battery racks are located inside the battery cluster housing and are used to install battery packs. When a battery cluster comprises multiple battery clusters, multiple battery racks are correspondingly installed inside the battery cluster housing, with each rack housing one battery cluster. Each battery rack includes multiple uprights, multiple crossbeams, and multiple side beams. The uprights extend along the height direction of the energy storage system, the crossbeams extend along the length direction of the energy storage system, and the side beams extend along the width direction of the energy storage system. The uprights, crossbeams, and side beams are arranged perpendicularly to each other. Multiple uprights, crossbeams, and side beams combine to form multiple battery cavities, each of which houses one battery pack.

[0040] The cooler 2 can be an air conditioner, used to provide cooling air. Alternatively, the cooler 2 can be a liquid-cooled unit, used to provide coolant. Or, the cooler 2 can be a cooling device, used to provide phase-change refrigerant. Taking an air conditioner as an example, the air conditioner can be a large, floor-standing unit, which can be installed inside or outside the battery cluster housing. In alternative embodiments, the air conditioner can be a small, wall-mounted unit, installed on the inner side of the battery cluster housing. The cooler 2 is provided with a pipe interface 21.

[0041] Continue to refer to Figures 3 to 5 The cooling pipe 3 includes a main pipe 31 and an auxiliary pipe 32. Both the main pipe inlet 311 and the auxiliary pipe inlet 321 are connected to the same pipe interface 21 of the cooler 2. The main pipe 31 has a main cavity 312 and multiple outlets 313. The cooling medium in the main cavity 312 is supplied to multiple battery clusters 10 through the multiple outlets 313. The multiple outlets 313 are arranged at intervals along the length x of the energy storage system, so that the main pipe 31 provides cooling to the multiple battery clusters 10. The multiple battery clusters 10 include a front battery cluster 101, a middle battery cluster 102, and a rear battery cluster 103 arranged along the flow direction of the cooling medium in the main pipe 31. The multiple outlets 313 of the main pipe 31 correspond to the front battery cluster 101, the middle battery cluster 102, and the rear battery cluster 103, respectively.

[0042] The auxiliary pipe 32 includes an auxiliary cavity 322. One end of the auxiliary cavity 322 is connected to the pipe interface 21. The cavity wall of the auxiliary cavity 322 is provided with an opening 325, which is connected to the main cavity 312 of the main pipe 31 and corresponds to the outlet 313 of the main pipe 31 corresponding to the rear battery cluster 103.

[0043] Understandably, since the front battery cluster 101 is cooled through the corresponding outlet 313 of the main pipe 31, and the rear battery cluster 103 is cooled through the corresponding outlet 313 of the main pipe 31, and the opening 325 of the auxiliary cavity 322 of the auxiliary pipe 32 connects to the main cavity 312 of the main pipe 31 corresponding to the outlet 313 of the rear battery cluster 103, the rear battery cluster 103 can be cooled simultaneously by both the main pipe 31 and the auxiliary pipe 32. Although the temperature of the cooling medium in the main cavity 312 of the main pipe 31 corresponds to that of the rear battery cluster 103... Compared to the main cavity 312 of the main pipe 31, the temperature of the cooling medium corresponding to the front battery cluster 101 increases. However, the cooling medium of the auxiliary cavity 322 of the auxiliary pipe 32 exchanges heat with the front battery cluster 101. Therefore, the cooling medium supplied to the main cavity 312 through the opening 325 of the auxiliary cavity 322 of the auxiliary pipe 32 is sufficient to enhance the cooling effect on the rear battery cluster 103, so that the cooling effect on the front battery cluster 101 and the rear battery cluster 103 is basically the same, thereby significantly reducing the temperature difference between the front battery cluster 101 and the rear battery cluster 103.

[0044] In some embodiments, the main pipe 31 includes two main pipe side plates 33, a main pipe top plate 35, and a main pipe bottom plate 36, wherein the two main pipe side plates 33 are connected between the main pipe top plate 35 and the main pipe bottom plate 36, and the two main pipe side plates 33 include a first main pipe side plate 331 and a second main pipe side plate 332. The main pipe 31 has a main pipe inlet end and a main pipe end end that are opposite to each other along the length direction x of the energy storage system, wherein the main pipe inlet end is provided with a main pipe inlet 311, and the main pipe end is set as a closed end.

[0045] The auxiliary pipe 32 includes two auxiliary pipe side plates 34, an auxiliary pipe top plate, and an auxiliary pipe bottom plate, wherein the two auxiliary pipe side plates 34 are connected between the auxiliary pipe top plate and the auxiliary pipe bottom plate. The auxiliary pipe top plate and the main pipe top plate 35 can be integrally installed, or they can be separately installed with the auxiliary pipe top plate connected to the main pipe top plate 35. The auxiliary pipe bottom plate and the main pipe bottom plate 36 can be integrally installed, or they can be separately installed with the auxiliary pipe bottom plate connected to the main pipe bottom plate 36.

[0046] Two auxiliary pipe side plates 34 are located between two main pipe side plates 33, dividing the main cavity 312 into a first main cavity 3121 and a second main cavity 3122. The auxiliary pipe 32 is located between the first main cavity 3121 and the second main cavity 3122. The height of the auxiliary pipe 32 is basically the same as the height of the main pipe 31. The inlet end of the main pipe 31 is flush with the inlet end 323 of the auxiliary pipe 32. This ensures that the flow rate of the cooling medium in the first main cavity 3121, the auxiliary cavity 322 and the second main cavity 3122 remains basically the same, which helps to improve the consistency of the cooling effect of the main pipe and the auxiliary pipe.

[0047] In some embodiments, the multiple outlets 313 of the main pipe 31 include multiple first main pipe outlets 3131 and multiple second main pipe outlets 3132 located on the base plate 36. The multiple first main pipe outlets 3131 and multiple second main pipe outlets 3132 are distributed at intervals along the length x-direction of the energy storage system. The cooling medium in the first main cavity 3121 is supplied to the corresponding front battery cluster 101, middle battery cluster 102, and rear battery cluster 103 through the multiple first main pipe outlets 3131. The cooling medium in the second main cavity 3122 is supplied to the corresponding front battery cluster 101, middle battery cluster 102, and rear battery cluster 103 through the multiple second main pipe outlets 3132. In a specific embodiment, the multiple first main pipe outlets 3131 and multiple second main pipe outlets 3132 are all configured as square holes, which helps to increase the heat exchange efficiency between the main pipe 31 and the multiple battery clusters 10.

[0048] In some embodiments, a plurality of first main pipe outlets 3131 and a plurality of second main pipe outlets 3132 are configured to correspond one-to-one, thereby ensuring that the cooling effect of the two parts of the main pipe 31 is balanced.

[0049] The cross-sectional area of ​​the first main pipe outlet 3131 and / or the cross-sectional area of ​​the second main pipe outlet 3132 increases in the direction away from the main pipe inlet 311. As a result, the cooling medium flowing out of a portion of the first main pipe outlet 3131 and / or a portion of the second main pipe outlet 3132 closer to the main pipe inlet 311 has a lower temperature but a smaller flow rate. Meanwhile, the cooling medium flowing out of another portion of the first main pipe outlet 3131 and / or another portion of the second main pipe outlet 3132 farther from the main pipe inlet 311 has a higher temperature but a larger flow rate. Furthermore, the cooling medium maintains a synchronous relationship of decreasing temperature and increasing flow rate in the flow direction. This helps to maintain a balanced cooling effect of the cooling pipe 3 as a whole, thereby maintaining a temperature balance among multiple battery clusters.

[0050] In some embodiments, the plurality of first main pipe outlets 3131 and the plurality of second main pipe outlets 3132 each include a plurality of adjacent first outlets 313a and second outlets 313b, wherein the second outlets 313b are disposed away from the main pipe inlet 311 relative to the first outlets 313a, and the ratio of the cross-sectional area of ​​the second outlet 313b to the cross-sectional area of ​​the first outlet 313a is 1.1 to 1.5. In specific implementations, the ratio of the cross-sectional area of ​​the second outlet 313b to the cross-sectional area of ​​the first outlet 313a can be 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, or any value between any two of the above values, or a range between any two of the above values.

[0051] The inventors discovered through research that when the ratio of the cross-sectional area of ​​the second outlet 313b to the cross-sectional area of ​​the first outlet 313a is greater than 1.5, the flow rate of the cooling medium along its flow direction increases significantly. This results in the flow rate of the cooling medium in the first half of the main pipe being significantly lower than that in the second half. The increased cooling effect due to the increased flow rate in the main pipe is significantly greater than the decreased cooling effect due to the increased temperature in the same direction, thus maintaining an inconsistent cooling effect along the flow direction of the main pipe. Conversely, when the ratio of the cross-sectional area of ​​the second outlet 313b to the cross-sectional area of ​​the first outlet 313a is less than 1.1, the increase in the flow rate of the cooling medium along its flow direction is less significant. This results in a smaller difference in flow rate between the first and second halves of the main pipe. The increased cooling effect due to the increased flow rate in the main pipe is significantly less than the decreased cooling effect due to the increased temperature in the same direction, again maintaining an inconsistent cooling effect along the flow direction of the main pipe.

[0052] In some embodiments, the two auxiliary pipe side plates 34 include a first auxiliary pipe side plate 341 and a second auxiliary pipe side plate 342. The first auxiliary pipe side plate 341 is provided with a plurality of first connecting ports 371, and the second auxiliary pipe side plate 342 is provided with a plurality of second connecting ports 372. The auxiliary cavity 322 is connected to the first main cavity 3121 through the plurality of first connecting ports 371, and the auxiliary cavity 322 is connected to the second main cavity 3122 through the plurality of second connecting ports 372. The plurality of first connecting ports 371 and the plurality of second connecting ports 372 are all configured to run along the energy storage system. The auxiliary cavity 322 and the main cavity 312 are spaced apart along the length direction x, so that, in addition to being connected through the opening 325, the cooling medium in the auxiliary cavity 322 can be supplied to the middle part of the first main cavity 3121 and the middle part of the second main cavity 3122 through multiple spaced first connecting ports 371 and multiple second connecting ports 372 respectively along the flow direction of the cooling medium, thereby gradually increasing the cooling effect of the cooling medium of the middle battery cluster 102 corresponding to the middle part of the first main cavity 3121 and / or the middle part of the second main cavity 3122.

[0053] Understandably, the front battery cluster 101 is cooled through the outlet 313 of the front section of the main pipe 31, and the rear battery cluster 103 is cooled through the outlet 313 of the rear section of the main pipe 31. The outlet 313 of the rear section of the main pipe 31 corresponds to the opening 325 of the auxiliary cavity 322 of the auxiliary pipe 32, thus ensuring that both the front battery cluster 101 and the rear battery cluster 103 are adequately cooled. The outlet 313 of the main pipe 31 corresponding to the middle battery cluster 102 is located in the middle section of the main cavity 312. Therefore, the cooling effect of the middle battery cluster 102 is less than that of the front battery cluster 101 and the rear battery cluster 103. By providing connecting ports on the two auxiliary pipe side plates 34 of the auxiliary pipe 32, which are connected to the middle section of the main cavity 312 of the main pipe 31, the cooling effect on the middle battery cluster 102 is enhanced. It should be noted that the cross-sectional area of ​​the first connecting port 371 and / or the cross-sectional area of ​​the second connecting port 372 are significantly smaller than the cross-sectional area of ​​the opening 325. Therefore, the cooling medium in the auxiliary pipe 32 mainly enters the rear half of the main cavity 312 through the opening 325.

[0054] In some embodiments, the plurality of first connecting ports 371 and the plurality of second connecting ports 372 are configured to correspond one-to-one, thereby ensuring that the cooling effect of the auxiliary pipe 32 on the two parts of the main pipe 31 is balanced.

[0055] The inner diameters of the multiple first connecting ports 371 and / or the multiple second connecting ports 372 increase in the direction away from the auxiliary pipe inlet 321. It is understood that this increase in the inner diameters of the multiple first connecting ports 371 and / or the multiple second connecting ports 372 in the direction away from the auxiliary pipe inlet 321 will increase the flow rate of the cooling medium along its flow direction, thereby gradually enhancing the cooling effect of the cooling medium flowing out of the auxiliary pipe 32 on the main pipe 31.

[0056] In some embodiments, the plurality of first connecting ports 371 and / or the plurality of second connecting ports 372 each include a plurality of adjacent first through holes 37a and second through holes 37b. The second through holes 37b are disposed further away from the auxiliary pipe inlet 321 relative to the first through holes 37a, and the ratio of the inner diameter of the second through hole 37b to the inner diameter of the first through hole 37a is 1.1 to 2. In specific implementations, the ratio of the inner diameter of the second through hole 37b to the inner diameter of the first through hole 37a can be 1.1, 1.15, 1.2, 1.26, 1.3, 1.37, 1.4, 1.48, 1.5, 1.52, 1.6, 1.63, 1.7, 1.73, 1.8, 1.84, 1.9, 1.95, 2.0, or any value between any two of the above values, or a range between any two of the above values.

[0057] The inventors discovered through research that when the ratio of the inner diameter of the second through hole 37b to the inner diameter of the first through hole 37a is less than 1, the enhanced cooling effect resulting from the increased flow rate of the multiple first connecting ports 371 and / or multiple second connecting ports 372 along the flow direction of the cooling medium cannot balance the weakening of the cooling effect caused by the temperature rise of the cooling medium during the flow process, thus hindering the maintenance of a balanced cooling effect in the overall cooling pipe. When the ratio of the inner diameter of the second through hole 37b to the inner diameter of the first through hole 37a is greater than 2, the enhanced cooling effect resulting from the significantly increased flow rate of the multiple first connecting ports 371 and / or multiple second connecting ports 372 along the flow direction of the cooling medium is significantly greater than the weakening of the cooling effect caused by the temperature rise of the cooling medium during the flow process, thus hindering the maintenance of a balanced cooling effect in the overall cooling pipe.

[0058] An auxiliary conduit 32 extends within the main cavity 312. The auxiliary conduit 32 has an inlet end 323 and an end end 324. An inlet 321 is located at the inlet end 323, and the end end 324 has an opening 325 that connects the auxiliary cavity 322 and the main cavity 312. Furthermore, the ratio of the distance d that the auxiliary conduit 32 extends within the main cavity 312 to the length L of the main cavity 312 is not less than 2 / 3 and not greater than 5 / 6.

[0059] Understandably, the cooling medium in the cooler 2 can be simultaneously supplied to the main pipe 31 and the auxiliary pipe 32 through the pipe interface 21, and the cooling medium in the main cavity 312 is supplied to multiple battery clusters 10 through multiple outlets 313. The cooling medium in the main cavity 312 has two sources: the first source is provided by the cooler 2 through the pipe interface 21, and the second source is provided by the cooling medium in the auxiliary pipe 32 through the opening 325 to the main pipe 31. The opening 325 of the auxiliary pipe 32 is located at the end of the auxiliary pipe 32. The ratio of the distance d that the auxiliary pipe 32 extends in the main cavity 312 to the length L of the main cavity 312 is not less than 2 / 3 and not greater than 5 / 6, so that the cooling medium in the latter half of the main cavity 312 away from the pipe interface 21 is supplemented by the auxiliary pipe 32, thereby effectively balancing the difference between the cooling effect of the first half of the main pipe 31 near the pipe interface 21 and the cooling effect of the latter half of the main pipe 31 away from the pipe interface 21.

[0060] In specific implementation, the ratio of the distance d that the auxiliary pipe 32 extends in the main cavity 312 to the length L of the main cavity 312 can be 2 / 3, 3 / 4, 4 / 5, 5 / 6, or any value between any two of the above values, or a range between any two of the above values.

[0061] Furthermore, the inventors discovered through research that when the ratio of the distance d from which the auxiliary pipe 32 extends in the main cavity 312 to the length L of the main cavity 312 is less than 2 / 3, the length of the composite cooling cavity formed after the auxiliary pipe 32 connects with the main pipe 31 is not less than 1 / 3 of the length of the main cavity 312. This results in a difference in cooling effect between the front and rear sections of the composite cooling cavity. When the ratio of the distance d from which the auxiliary pipe 32 extends in the main cavity 312 to the length L of the main cavity 312 is greater than 5 / 6, the length of the composite cooling cavity formed after the auxiliary pipe 32 connects with the main pipe 31 is not greater than 1 / 6 of the length of the main cavity 312. Therefore, only a small portion of the battery modules corresponding to the battery clusters at the tail end can receive the cooling effect provided by the main pipe 31 enhanced by the auxiliary pipe 32, which is detrimental to the overall cooling effect of the cooling pipe 3.

[0062] An embodiment of this application also provides a cooling module, which includes the cooling pipes and cooler provided in the above embodiments.

[0063] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An energy storage system, characterized in that, include: Battery clusters, comprising multiple battery clusters; Refrigerator, including pipe connections; as well as A cooling pipe includes a main pipe and an auxiliary pipe. The main pipe has a main cavity that is connected to the pipe interface. The main cavity has multiple main pipe outlets on its cavity wall. The auxiliary pipe has an auxiliary cavity that is connected to the pipe interface. The auxiliary cavity has an opening on its cavity wall. The plurality of battery clusters include a front battery cluster and a rear battery cluster arranged along the flow direction of the cooling medium in the main pipe. The plurality of main pipe outlets are used to cool the front battery cluster and the rear battery cluster. The openings are connected to the main cavity and correspond to the main pipe outlets corresponding to the rear battery clusters.

2. The energy storage system according to claim 1, characterized in that, The plurality of battery clusters also includes a middle battery cluster located between the front battery cluster and the rear battery cluster, and the plurality of main pipe outlets are used to cool the front battery cluster, the middle battery cluster and the rear battery cluster, and the cross-sectional area of ​​the plurality of main pipe outlets increases in the flow direction of the cooling medium in the main pipes.

3. The energy storage system according to claim 2, characterized in that, In the flow direction of the cooling medium in the main pipeline, the ratio of the cross-sectional areas of two adjacent outlets of the main pipeline ranges from 1.1 to 1.

5.

4. The energy storage system according to claim 2, characterized in that, The auxiliary cavity wall is also provided with multiple connecting ports, which are used to connect to the main cavity to connect to multiple main pipe outlets corresponding to the central battery cluster.

5. The energy storage system according to claim 4, characterized in that, In the flow direction of the cooling medium in the auxiliary pipe, the cross-sectional area of ​​the plurality of connecting ports increases.

6. The energy storage system according to claim 5, characterized in that, In the flow direction of the cooling medium in the auxiliary pipe, the ratio of the cross-sectional areas of two adjacent connecting ports ranges from 1.1 to 2.

7. The energy storage system according to any one of claims 1 to 6, characterized in that, The auxiliary pipe is disposed within the main cavity, and the opening is disposed at the end of the auxiliary pipe.

8. The energy storage system according to claim 7, characterized in that, The ratio of the length of the auxiliary pipe to the length of the main cavity is not less than 2 / 3 and not greater than 5 / 6.

9. The energy storage system according to claim 7, characterized in that, The main pipeline includes two main pipeline side plates and a top plate and a bottom plate connected between the two main pipeline side plates. The auxiliary pipeline includes two auxiliary pipeline side plates, which are spaced apart between the two main pipeline side plates. The top of the two auxiliary pipeline side plates is connected to the top plate, and the bottom of the two auxiliary pipeline side plates is connected to the bottom plate.

10. A cooling pipe for an energy storage system, characterized in that, The cooling pipe includes the cooling pipe of the energy storage system according to any one of claims 1-9.

11. A cooling module for an energy storage system, characterized in that, The cooling module includes the cooling pipes and cooler as described in any one of claims 1-9.

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