Energy storage liquid cooling pipeline system with balancing function

Abstract

The utility model provides an energy storage liquid cooling pipeline system with a balancing function. The energy storage liquid cooling pipeline system comprises a first-stage pipeline, a plurality of second-stage pipelines and a plurality of third-stage pipelines, the primary pipeline comprises a first liquid inlet pipeline and a first liquid return pipeline; the first liquid inlet pipeline is communicated with a liquid inlet of the liquid cooling unit; the first liquid return pipeline is communicated with a liquid return port of the liquid cooling unit; the height difference between the first liquid inlet pipeline and the first liquid return pipeline is greater than or equal to 1.6 m; the secondary pipelines are arranged below the first liquid inlet pipeline; the first liquid inlet pipeline and the first liquid return pipeline are each provided with a water flow acceleration device. Through reasonable arrangement of the liquid cooling pipeline, the cooling liquid flows in and out in an upper-in and lower-out manner, so that uniform liquid feeding is ensured, the cooling efficiency of the battery pack is effectively improved, the uniformity of the temperature of each part in the battery pack in the three-stage pipeline is ensured, and the balance of the whole liquid cooling pipeline system is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy large -scale energy storage system heat equalization technical field especially relates to a liquid cooling pipeline system with equalizing function for energy storage. BACKGROUND

[0002] The existing liquid cooling system basically cools the liquid along the liquid cooling pipeline to the bottom of the battery module, then utilizes heat conduction to take away the excess heat, realizes the temperature reduction of the energy storage system in the whole operating condition and prevents overheating. However, with the increasing demand of the energy storage industry, the large-capacity and high-density energy storage system is getting larger and larger, and the original liquid cooling system cannot meet the current product demand. The representative problem is that the higher the energy storage battery rack is, the smaller the pressure of the cooling liquid on the top battery module is, and the slower the flow rate is. The temperature of the whole energy storage system is not uniform, which poses a severe challenge to the thermal control of the whole energy storage system.

[0003] CN221057519U discloses a liquid cooling pipeline for energy storage system, which utilizes an inlet pipe, a shunt pipe, a plurality of overcurrent pipe groups and an outlet pipe. The shunt pipe is arranged at the front end of the inlet pipe. When the liquid flows through the shunt pipe, the liquid flows into the interior of the overcurrent pipe group through different shunt cavities, thereby realizing liquid distribution. Through a large number of shunt pipes, the liquid in the interior of each overcurrent pipe group flows equally. However, the above scheme greatly increases the pipeline arrangement workload and the assembly area of the pipeline.

[0004] CN107403975A discloses a liquid cooling system flow equalization device and method for energy storage battery, which comprises a plurality of parallel battery modules. Each battery module is connected to a liquid cooling system and is provided with a cooling liquid inlet. A throttle pipe is arranged in the cooling liquid inlet, and a throttle hole is arranged on the throttle pipe. The cooling liquid in the cooling liquid inlet is adjusted to the same pressure through the throttle pipe. The scheme adjusts the pipeline pressure by arranging the throttle pipe, but it still increases the pipeline arrangement workload.

[0005] In summary, the above schemes have the problems of low feasibility, complex structure, high cost and difficulty in actual application. Therefore, it is an urgent technical problem for those skilled in the art to provide a liquid cooling pipeline system for energy storage that can solve the above problems. SUMMARY

[0006] The utility model aims at providing a liquid cooling pipeline system for energy storage with equalizing function, which realizes uniform liquid delivery by reasonably arranging the liquid cooling pipeline and making the cooling liquid flow in and out in the up-in and down-out mode, effectively improves the cooling efficiency of the battery pack, ensures the uniformity of the temperature in the battery pack in the three-stage pipeline, and further improves the equalization of the overall liquid cooling pipeline system.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] The utility model provides a liquid cooling pipeline system for energy storage with a balancing function, wherein the liquid cooling pipeline system for energy storage includes a primary pipeline, a plurality of secondary pipelines and a plurality of tertiary pipelines;

[0009] The primary pipeline includes a first liquid inlet pipeline and a first liquid return pipeline; the first liquid inlet pipeline is connected to the liquid inlet of the liquid cooling unit; the first liquid return pipeline is connected to the liquid return port of the liquid cooling unit;

[0010] The height difference between the first liquid inlet pipeline and the first liquid return pipeline is ≥1.6m; the secondary pipelines are all arranged below the first liquid inlet pipeline;

[0011] The first liquid inlet pipeline and the first liquid return pipeline are both provided with a water flow acceleration device;

[0012] The secondary pipeline includes a second liquid inlet pipeline and a second liquid return pipeline; the second liquid inlet pipeline is connected to the first liquid inlet pipeline; the second liquid return pipeline is connected to the first liquid return pipeline;

[0013] The tertiary pipeline includes a third liquid inlet pipeline and a third liquid return pipeline; one end of the third liquid inlet pipeline is connected to the second liquid inlet pipeline, and the other end is connected to the battery assembly; one end of the third liquid return pipeline is connected to the second liquid return pipeline, and the other end is connected to the battery assembly.

[0014] In the present invention, the height difference between the first liquid inlet pipeline and the first liquid return pipeline is ≥1.6m, for example, it can be 1.65m, 1.7m, 1.75m, 1.8m, 1.85m, 1.9m, 1.95m or 2m, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0015] In this utility model, throttle valves are installed at the connection between the primary and secondary pipelines, as well as at the connection between the secondary and tertiary pipelines, to control the flow rate of the coolant. The first liquid inlet pipeline and the first liquid return pipeline are both arranged in a gate shape, effectively improving space utilization.

[0016] The liquid cooling pipeline system for energy storage provided by the present invention, through the reasonable arrangement of the liquid cooling pipeline, allows the coolant to flow in and out in an upward-input and downward-outflow manner, ensuring balanced pressure at various locations in the liquid cooling pipeline system, achieving uniform liquid delivery, effectively improving the cooling efficiency of the battery pack, and ensuring uniform temperature at various locations in the battery pack within the three-stage pipeline, thereby improving the balance of the overall liquid cooling pipeline system.

[0017] It is worth noting that by controlling the height difference between the first liquid inlet pipeline and the first liquid return pipeline, and controlling the second pipeline to be arranged below the first liquid inlet pipeline, the cooling liquid flows in the first pipeline, the second pipeline and the third pipeline of the liquid cooling pipeline in the up-down flow mode, which can not only reduce the flow resistance, reduce the power consumption of the pump body, realize uniform liquid delivery, increase the product safety, but also improve the cooling efficiency.

[0018] As a preferred technical scheme of the utility model, the intermediate section of the first liquid inlet pipeline and the first liquid return pipeline is provided with a water flow accelerating device.

[0019] In the utility model, in order to avoid the insufficient lift of the second half of the first pipeline, the water flow accelerating device is arranged in the intermediate section, secondary pressurization is started, and then the cooling liquid flow rate of the second half is ensured to meet the demand, and the uneven cooling liquid flow rate is avoided.

[0020] As a preferred technical scheme of the utility model, the length of the first liquid return pipeline is 4-6m, for example, it can be 4.2m, 4.5m, 4.6m, 4.8m, 5m, 5.2m, 5.5m, 5.6m or 5.8m, but not limited to the listed values, other values within the value range are also applicable.

[0021] In the utility model, by reasonably setting the length of the first liquid return pipeline, the pressure drop of the cooling liquid in the pipeline is reduced, and the energy consumption of the system is improved.

[0022] As a preferred technical scheme of the utility model, the distance between adjacent second liquid inlet pipelines is 75-100cm, for example, it can be 76cm, 78cm, 80cm, 82cm, 85cm, 86cm, 88cm, 90cm, 92cm, 95cm, 96cm or 98cm, but not limited to the listed values, other values within the value range are also applicable.

[0023] In the utility model, the distance between adjacent second liquid return pipelines is 75-100cm.

[0024] In the utility model, by controlling the distance between adjacent second liquid inlet pipelines (second liquid return pipelines), not only the flow resistance of the cooling liquid can be reduced, but also the heat exchange efficiency can be improved, and the safety and reliability of the liquid cooling pipeline system are provided.

[0025] As a preferred technical scheme of the utility model, the water outlet of the third liquid inlet pipeline is arranged at the top of the battery assembly and located above the water inlet of the third liquid return pipeline.

[0026] In the utility model, the cooling liquid flows from the top of the battery assembly to the bottom in sequence to reduce the flow resistance and increase the product reliability.

[0027] In the utility model, the battery assembly comprises a battery system and / or a PCS, preferably a battery pack.

[0028] As the preferred technical scheme of the utility model, the inner diameter of the first pipeline is 23-28mm, for example, it can be 23.5mm, 24mm, 24.5mm, 25mm, 25.5mm, 26mm, 26.5mm, 27mm or 27.5mm, but is not limited to the listed values, and other values within the value range are also applicable.

[0029] Preferably, the inner diameter of the second pipeline is 13-15mm, for example, it can be 13.2mm, 13.5mm, 13.6mm, 13.8mm, 14mm, 14.2mm, 14.5mm, 14.6mm or 14.8mm, but is not limited to the listed values, and other values within the value range are also applicable.

[0030] Preferably, the inner diameter of the third pipeline is 8.5-9.5mm, for example, it can be 8.6mm, 8.7mm, 8.8mm, 8.9mm, 9mm, 9.1mm, 9.2mm, 9.3mm or 9.4mm, but is not limited to the listed values, and other values within the value range are also applicable.

[0031] In the utility model, by controlling the inner diameter range of the first pipeline, the second pipeline and the third pipeline, not only the flow of the cooling liquid in the third pipeline can be uniform, but also the cooling liquid can be evenly distributed between the battery packs, reducing the temperature difference.

[0032] As the preferred technical scheme of the utility model, the second pipelines are arranged in parallel along the length direction of the first pipeline.

[0033] Preferably, the third pipelines are arranged in parallel at intervals along the length direction of the second pipeline.

[0034] In the utility model, each third pipeline is connected with a battery assembly, by arranging the second pipelines and the third pipelines, the space occupation of the energy storage system can be reduced, and the space utilization can be effectively improved.

[0035] As the preferred technical scheme of the utility model, the water inlets of the second pipelines are respectively independently provided with first temperature detection devices and first control valves.

[0036] Preferably, the first control valve is used for controlling the opening and closing of the second liquid inlet pipeline.

[0037] Preferably, the water outlets of the second liquid return pipelines are respectively independently provided with second temperature detection devices and second control valves.

[0038] Preferably, the second control valve is used for controlling the opening and closing of the second liquid return pipeline.

[0039] In the utility model, through setting temperature detection device and control valve in the inlet and outlet of two-stage pipeline, ensure that two-stage pipeline is controllable, can automatically regulate and control the cooling liquid flow in single battery rack through liquid cooling unit terminal, avoid that the whole liquid cooling pipeline flow resistance is in disorder after water flow accelerating device pressurizes.

[0040] As the preferred technical scheme of the utility model, the water inlets of the third liquid inlet pipelines are respectively independently provided with third temperature detection devices and third control valves.

[0041] Preferably, the third control valve is used for controlling the opening and closing of the third liquid inlet pipeline.

[0042] Preferably, the water outlets of the third liquid return pipelines are respectively independently provided with fourth temperature detection devices and fourth control valves.

[0043] Preferably, the fourth control valve is used for controlling the opening and closing of the third liquid return pipeline.

[0044] In the utility model, through setting temperature detection device and control valve in the inlet and outlet of three-stage pipeline, the failure of heat source can be conveniently and accurately judged, the whole system does not need to be checked, can also be fed back to control assembly, and then the flow rate of the whole system is automatically balanced through liquid cooling unit terminal, refrigerating capacity is adjusted, so that the uniformity of the temperature in battery pack in three-stage pipeline is realized.

[0045] In the utility model, the first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves.

[0046] As the preferred technical scheme of the utility model, the liquid cooling pipeline system for energy storage further includes a control assembly.

[0047] Preferably, the control assembly is respectively independently connected with the liquid cooling unit, the water flow accelerating device, the temperature detection device and the control valve through signals.

[0048] The utility model also provides a kind of control method of the liquid cooling pipeline system for energy storage as described above, and the control method comprises:

[0049] The cooling liquid flowing out of the liquid cooling unit flows into the first liquid inlet pipeline, the second liquid inlet pipeline and the third liquid inlet pipeline in turn in an up-down manner, and then is delivered into the battery assembly, after heat exchange, the cooling liquid flows back to the liquid cooling unit through the third liquid return pipeline, the second liquid return pipeline and the first liquid return pipeline, and the flow rate of the cooling liquid is controlled by the water flow accelerating device.

[0050] The control method provided by the utility model adopts the up-down flowing manner of the cooling liquid, reduces the flow resistance and the power consumption of the pump body, realizes uniform liquid delivery, and pressurizes the cooling liquid through the water flow accelerating device, ensures the stability of the flow rate of the cooling liquid in the whole liquid cooling pipeline system, and further ensures the uniformity of the temperature of the battery pack in the three-stage pipeline, and further improves the balance of the whole liquid cooling pipeline system and the stability of the battery pack.

[0051] In the utility model, the cooling liquid in the third liquid inlet pipeline flows into the upper part of the battery assembly, and then flows out from the lower part of the battery assembly into the third liquid return pipeline.

[0052] In the utility model, the flow rate of the cooling liquid is adjusted according to the real-time temperature of the first temperature detecting device, the second temperature detecting device, the third temperature detecting device and the fourth temperature detecting device. Whether the secondary pipeline is faulty is judged according to the temperature difference between the first temperature detecting device and the second temperature detecting device. Whether the heat source is faulty is judged according to the temperature difference between the third temperature detecting device and the fourth temperature detecting device.

[0053] Compared with the prior art, the utility model has the following beneficial effects:

[0054] (1) The liquid cooling pipeline system for energy storage provided by the utility model realizes uniform liquid delivery by the reasonable setting of the liquid cooling pipeline, the setting of the water flow accelerating device and the temperature detecting device, ensures the pressure balance of the liquid cooling pipeline system at all places, effectively improves the cooling efficiency of the battery pack, guarantees the uniformity of the temperature of the battery pack at all places in the three-stage pipeline, and further improves the balance of the whole liquid cooling pipeline system, wherein the maximum temperature difference between the battery packs is less than 3 DEG C.

[0055] (2) The liquid cooling pipeline system for energy storage provided by the utility model has high feasibility, low cost, simple structure, can reduce the occupation of the space of the energy storage system, and effectively improves the space utilization rate. DRAWINGS

[0056] Figure 1 The structural schematic view of the liquid cooling pipeline system for energy storage provided for the embodiment 1 is shown in the figure.

[0057] Figure 2 The front view of the liquid cooling pipeline system for energy storage provided for the embodiment 1 is shown in the figure.

[0058] Figure 3 For Figure 2 A front view of the cooling liquid flow direction in the middle part of the pipeline;

[0059] Figure 4 For Figure 2 A side view of the cooling liquid flow direction in the middle part of the pipeline;

[0060] 1-liquid cooling unit; 2-first liquid inlet pipeline; 3-first temperature detection device, 4-first electromagnetic control valve; 5-second liquid inlet pipeline; 6-water flow accelerating device; 7-third liquid inlet pipeline; 8-first liquid return pipeline; 9-second liquid return pipeline; 10-third liquid return pipeline; 11-fourth temperature detection device; 12-third electromagnetic control valve;

[0061] Wherein, the arrow indicates the flow direction of the cooling liquid. DETAILED DESCRIPTION

[0062] It should be understood that in the description of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0063] It should be noted that in the description of the present application, unless otherwise specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0064] The technical scheme of the present application will be further illustrated by specific embodiments in conjunction with the drawings.

[0065] In the following examples and comparative examples, the first pipeline and the second pipeline are connected, and the second pipeline and the third pipeline are connected, and the throttling valve is provided; the number of the second pipeline is determined according to the length of the first liquid return pipeline and the distance between the second liquid inlet pipeline and the second liquid return pipeline; the number of the third pipeline is adjusted according to the size of the battery pack, and the person skilled in the art can determine it according to the actual situation.

[0066] Example 1

[0067] The embodiment provides a liquid cooling pipeline system with a balancing function for energy storage (as shown in the figure), and the liquid cooling pipeline system for energy storage comprises a primary pipeline, a plurality of secondary pipelines and a plurality of tertiary pipelines. Figures 1-4

[0068] The plurality of secondary pipelines are arranged in parallel along the length direction of the primary pipeline; the plurality of tertiary pipelines are arranged in parallel at intervals along the length direction of the secondary pipeline; the inner diameter of the primary pipeline is 25 mm; the inner diameter of the secondary pipeline is 14 mm; and the inner diameter of the tertiary pipeline is 9 mm.

[0069] The primary pipeline comprises a first liquid inlet pipeline 2 and a first liquid return pipeline 8; the first liquid inlet pipeline 2 is connected with the liquid inlet of a liquid cooling unit 1; and the first liquid return pipeline 8 is connected with the liquid return of the liquid cooling unit 1.

[0070] The height difference between the first liquid inlet pipeline 2 and the first liquid return pipeline 8 is 1.8 m; and the secondary pipelines are all arranged below the first liquid inlet pipeline 2.

[0071] The first liquid inlet pipeline 2 and the first liquid return pipeline 8 are both arranged in a door shape; and the middle sections of the first liquid inlet pipeline 2 and the first liquid return pipeline 8 are both provided with water flow accelerating devices 6.

[0072] The secondary pipeline comprises a second liquid inlet pipeline 5 and a second liquid return pipeline 9; the second liquid inlet pipeline 5 is connected with the first liquid inlet pipeline 2; and the second liquid return pipeline 9 is connected with the first liquid return pipeline 8.

[0073] The length of the first liquid return pipeline 8 is 5 m; and the interval between adjacent second liquid inlet pipelines 2 (or second liquid return pipelines 9) is 80 cm.

[0074] The tertiary pipeline comprises a third liquid inlet pipeline 7 and a third liquid return pipeline 10; one end of the third liquid inlet pipeline 7 is connected with the second liquid inlet pipeline 5, and the other end is connected with a battery pack; one end of the third liquid return pipeline 10 is connected with the second liquid return pipeline 9, and the other end is connected with the battery pack; and the water outlet of the third liquid inlet pipeline 7 is arranged at the top of the battery pack and located above the water inlet of the third liquid return pipeline 10.

[0075] ​The water inlet of the second liquid inlet pipeline 5 is respectively independently provided with a first temperature detection device 3 and a first electromagnetic control valve 4; the first electromagnetic control valve 4 is used for controlling the on-off of the second liquid inlet pipeline 5; the water outlet of the second liquid return pipeline 9 is respectively independently provided with a second temperature detection device and a second electromagnetic control valve; the second electromagnetic control valve is used for controlling the on-off of the second liquid return pipeline 9; the water inlet of the third liquid inlet pipeline 7 is respectively independently provided with a third temperature detection device and a third electromagnetic control valve 12; the third electromagnetic control valve 12 is used for controlling the on-off of the third liquid inlet pipeline 7; the water outlet of the third liquid return pipeline 10 is respectively independently provided with a fourth temperature detection device 11 and a fourth electromagnetic control valve; the fourth electromagnetic control valve is used for controlling the on-off of the third liquid return pipeline 10.

[0076] The energy storage liquid cooling pipeline system further comprises a control assembly; the control assembly is respectively independently connected with the liquid cooling unit, the water flow accelerating device, the temperature detection device and the control valve through signals.

[0077] Example 2

[0078] The embodiment provides a liquid cooling pipeline system for energy storage with a balancing function, wherein, except that the height difference between the first liquid inlet pipeline and the first liquid return pipeline is 2m, the length of the first liquid return pipeline is 6m, and the spacing between adjacent second liquid inlet pipelines (or second liquid return pipelines) is 100cm, other conditions are the same as those in example 1.

[0079] Example 3

[0080] The embodiment provides a liquid cooling pipeline system for energy storage with a balancing function, wherein, except that the height difference between the first liquid inlet pipeline and the first liquid return pipeline is 1.6m, the length of the first liquid return pipeline is 4m, and the spacing between adjacent second liquid inlet pipelines (or second liquid return pipelines) is 75cm, other conditions are the same as those in example 1.

[0081] Example 4

[0082] The embodiment provides a liquid cooling pipeline system for energy storage with a balancing function, wherein, except that the spacing between adjacent second liquid inlet pipelines (or second liquid return pipelines) is 50cm, other conditions are the same as those in example 1.

[0083] Example 5

[0084] The embodiment provides a liquid cooling pipeline system for energy storage with a balancing function, wherein, except that the spacing between adjacent second liquid inlet pipelines (or second liquid return pipelines) is 130cm, other conditions are the same as those in example 1.

[0085] Example 6

[0086] The embodiment provides a liquid cooling pipeline system with a balancing function for energy storage, wherein, except that the inner diameter of the secondary pipeline is 25 mm, other conditions are the same as those in embodiment 1.

[0087] Embodiment 7

[0088] The embodiment provides a liquid cooling pipeline system with a balancing function for energy storage, wherein, except that the inner diameter of the secondary pipeline is 9 mm, other conditions are the same as those in embodiment 1.

[0089] Embodiment 8

[0090] The embodiment provides a liquid cooling pipeline system with a balancing function for energy storage, wherein, except that the water inlet of the second liquid inlet pipeline and the water outlet of the second liquid return pipeline are not provided with temperature detection devices, other conditions are the same as those in embodiment 1.

[0091] Comparative example 1

[0092] The comparative example provides a liquid cooling pipeline system for energy storage, wherein, except that the height difference between the first liquid inlet pipeline and the first liquid return pipeline is 1 m, other conditions are the same as those in embodiment 1.

[0093] Comparative example 2

[0094] The comparative example provides a liquid cooling pipeline system for energy storage, wherein, except that the height difference between the first liquid inlet pipeline and the first liquid return pipeline is 0.3 m, and the secondary pipeline is arranged above the first liquid inlet pipeline, other conditions are the same as those in embodiment 1.

[0095] Comparative example 3

[0096] The comparative example provides a liquid cooling pipeline system for energy storage, wherein, except that the intermediate sections of the first liquid inlet pipeline and the first liquid return pipeline are not provided with water flow accelerating devices, other conditions are the same as those in embodiment 1.

[0097] In the following application examples and comparative application examples, the liquid cooling pipeline system for energy storage is subjected to air tightness test, vacuum pumping, cooling liquid injection and start-up debugging in sequence before operation.

[0098] Application example 1

[0099] The application example provides a balancing control method of a liquid cooling pipeline system for energy storage, wherein the balancing control method is performed by using the liquid cooling pipeline system for energy storage provided in embodiment 1, and the balancing control method comprises the following steps.

[0100] The cooling liquid flowing out of the liquid cooling unit flows into the first liquid inlet pipeline, the second liquid inlet pipeline and the third liquid inlet pipeline in turn in the top-in and bottom-out mode, and then flows into the battery pack along the top of the battery pack, exchanges heat, and then flows out along the bottom of the battery pack into the third liquid return pipeline, and then flows back to the liquid cooling unit in turn through the second liquid return pipeline and the first liquid return pipeline;

[0101] The flow rate of the cooling liquid is controlled by the water flow accelerating device, the flow rate of the cooling liquid is adjusted by the throttle valve according to the real-time temperatures of the first temperature detection device, the second temperature detection device, the third temperature detection device and the fourth temperature detection device, whether the secondary pipeline is faulty is judged according to the temperature difference between the first temperature detection device and the second temperature detection device, and whether the battery pack is faulty is judged according to the temperature difference between the third temperature detection device and the fourth temperature detection device.

[0102] Application Example 2-8 and Comparative Application Example 1-3

[0103] In addition to using the liquid cooling pipeline system for energy storage provided in Example 2-9 and Comparative Example 1-3, other conditions are the same as those in Application Example 1.

[0104] The maximum temperature difference between the battery packs in the liquid cooling pipeline system for energy storage in the above application examples and comparative application examples is recorded, and the results are analyzed; the above results are shown in Table 1.

[0105] Table 1

[0106]

[0107]

[0108] Wherein, " / " represents that the temperature difference between each battery pack in the liquid cooling pipeline system cannot be effectively measured.

[0109] As can be seen from Table 1, the liquid cooling pipeline system for energy storage provided by the utility model makes the cooling liquid flow in and out in the top-in and bottom-out mode through the reasonable setting of the liquid cooling pipeline, ensures the realization of uniform liquid feeding, effectively improves the cooling efficiency of the battery pack, and guarantees the uniformity of the temperature at each place in the battery pack in the three-stage pipeline, thereby improving the balance of the overall liquid cooling pipeline system.

[0110] The applicant declares that the above description is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and those skilled in the art should understand that any change or replacement within the technical range disclosed by the utility model can be easily thought of by any person skilled in the art, and falls within the protection scope and disclosure range of the utility model.

Claims

1. A liquid cooling pipeline system for energy storage with a balancing function, characterized in that: The energy storage liquid cooling pipeline system includes a primary pipeline, a plurality of secondary pipelines and a plurality of tertiary pipelines; The primary pipeline includes a first liquid inlet pipeline and a first liquid return pipeline; the first liquid inlet pipeline is connected to the liquid inlet of the liquid cooling unit; the first liquid return pipeline is connected to the liquid return port of the liquid cooling unit; The height difference between the first liquid inlet pipeline and the first liquid return pipeline is ≥1.6m; the secondary pipelines are all arranged below the first liquid inlet pipeline; The first liquid inlet pipeline and the first liquid return pipeline are both provided with a water flow acceleration device; The secondary pipeline includes a second liquid inlet pipeline and a second liquid return pipeline; the second liquid inlet pipeline is connected to the first liquid inlet pipeline; the second liquid return pipeline is connected to the first liquid return pipeline; The tertiary pipeline includes a third liquid inlet pipeline and a third liquid return pipeline; one end of the third liquid inlet pipeline is connected to the second liquid inlet pipeline, and the other end is connected to the battery assembly; one end of the third liquid return pipeline is connected to the second liquid return pipeline, and the other end is connected to the battery assembly.

2. The energy storage liquid cooling pipeline system with a balancing function according to claim 1 is characterized in that: The middle sections of the first liquid inlet pipeline and the first liquid return pipeline are both provided with water flow acceleration devices.

3. The energy storage liquid cooling pipeline system with a balancing function according to claim 1 is characterized in that: The length of the first liquid return pipeline is 4-6m.

4. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: The distance between adjacent second liquid inlet pipelines is 75-100 cm.

5. The energy storage liquid cooling pipeline system with a balancing function according to claim 1 is characterized in that: The water outlet of the third liquid inlet pipeline is arranged on the top of the battery assembly and is located above the water inlet of the third liquid return pipeline.

6. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: The inner diameter of the primary pipeline is 23-28 mm; The inner diameter of the secondary pipeline is 13-15 mm; The inner diameter of the tertiary pipeline is 8.5-9.5 mm.

7. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: A plurality of the secondary pipelines are arranged in parallel along the length direction of the primary pipeline; A plurality of the tertiary pipelines are arranged in parallel at intervals along the length direction of the secondary pipeline.

8. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: The water inlets of the second liquid inlet pipeline are each independently provided with a first temperature detection device and a first control valve; The first control valve is used to control the on-off of the second liquid inlet pipeline; The water outlets of the second liquid return pipeline are each independently provided with a second temperature detection device and a second control valve; The second control valve is used to control the on-off of the second liquid return pipeline.

9. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: The water inlets of the third liquid inlet pipeline are each independently provided with a third temperature detection device and a third control valve; The third control valve is used to control the on-off of the third liquid inlet pipeline; The water outlets of the third liquid return pipeline are each independently provided with a fourth temperature detection device and a fourth control valve; The fourth control valve is used to control the on-off of the third liquid return pipeline.

10. The energy storage liquid cooling pipeline system with a balancing function according to claim 1, characterized in that: The energy storage liquid cooling pipeline system also includes a control component; The control component is independently connected to the liquid cooling unit, the water flow acceleration device, the temperature detection device and the control valve through signals.

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