Liquid cooling system of energy storage equipment

Abstract

The utility model provides a liquid cooling system of energy storage equipment, which belongs to the technical field of liquid cooling of energy storage equipment and comprises an energy storage cabin cabinet body, a liquid cooling pipeline, a liquid cooling circulation module, a refrigeration module and a plurality of liquid cooling plates. A plurality of energy storage modules which are arranged in sequence are arranged in the energy storage cabin cabinet body; each energy storage module comprises a plurality of energy storage boxes which are vertically and sequentially arranged layer by layer; each energy storage box is internally provided with a plurality of battery cells which are arranged in the same layer in rows and columns, and the battery cells are connected in series; a liquid cooling plate is arranged at the lower part of the battery cells arranged in rows and columns of each energy storage box; each liquid cooling plate is communicated with the liquid cooling circulation module through a liquid cooling pipeline; and the liquid cooling circulation module is connected with the refrigeration module. The liquid cooling plates are distributed to the energy storage modules in the energy storage system according to the energy storage boxes, so that liquid cooling heat dissipation of the intensive energy storage system is realized, the heat dissipation effect is good, the fan is introduced into the refrigeration module to realize combination of liquid cooling and air cooling, and the liquid cooling cost is further reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid cooling of energy storage equipment, and in particular relates to a liquid cooling system for energy storage equipment. Background Art

[0002] Energy storage systems are a key technology for balancing electricity supply and demand and improving grid flexibility, and their importance is growing. Energy storage systems generate significant heat during operation, especially during high-rate charge and discharge. This heat accumulation can cause a sharp rise in internal battery temperatures, impacting battery performance, lifespan, and even safety. Therefore, ensuring the heat dissipation performance of energy storage systems is crucial. Currently, energy storage systems primarily utilize air cooling and liquid cooling. Air cooling is widely used in some energy storage systems due to its simplicity, low cost, and ease of maintenance. However, with the continuous increase in energy storage system capacity and increasing cell integration, the heat generated by battery packs during heat dissipation has also increased significantly. In particular, with the increasing demand for intensive energy storage system development, energy storage systems require higher heat dissipation efficiency and improved temperature uniformity. Air cooling alone is clearly insufficient. If heat cannot be dissipated promptly, it can accumulate within the battery cells, causing them to overheat. This can negatively impact performance at best, or even lead to thermal runaway and serious safety incidents. Liquid cooling has become the preferred heat dissipation method for energy storage systems due to its high heat dissipation performance, good temperature uniformity, and low noise. However, as energy storage systems become increasingly dense, designing liquid cooling for them has become a current challenge.

[0003] This is a shortcoming of the existing technology. Therefore, it is very necessary to provide a liquid cooling system for energy storage equipment to address the above-mentioned defects in the existing technology. Summary of the Invention

[0004] In view of the above-mentioned defect of the prior art in that it is difficult to design liquid cooling and heat dissipation for a dense energy storage system, the present invention provides a liquid cooling system for an energy storage device to solve the above-mentioned technical problem.

[0005] The utility model provides a liquid cooling system for energy storage equipment, comprising an energy storage cabin cabinet, a liquid cooling pipeline, a liquid cooling circulation module, a refrigeration module and a plurality of liquid cooling plates;

[0006] The energy storage compartment cabinet is provided with a number of energy storage modules arranged in sequence;

[0007] Each energy storage module includes a number of energy storage boxes arranged vertically in layers;

[0008] Each energy storage box is equipped with a number of battery cells arranged in rows and columns on the same layer, and the battery cells are connected in series;

[0009] A liquid cooling plate is provided under the battery cells arranged in rows and columns in each energy storage box;

[0010] Each liquid cooling plate is connected to the liquid cooling circulation module through a liquid cooling pipeline;

[0011] The liquid cooling circulation module is connected to the refrigeration module.

[0012] Furthermore, the liquid cooling pipeline includes a liquid supply main pipe, a liquid return main pipe, a plurality of liquid supply branch pipes and a plurality of liquid return branch pipes;

[0013] The liquid supply pipe and liquid return pipe are installed at the bottom of the energy storage tank cabinet, and each liquid supply branch pipe and each liquid return branch pipe are installed vertically;

[0014] Each energy storage module corresponds to a liquid supply branch pipe and a liquid return branch pipe. The lower part of each liquid supply branch pipe is connected to the liquid supply main pipe, and each liquid return branch pipe is connected to the liquid return main pipe.

[0015] The liquid supply branch pipe and the liquid return branch pipe of each energy storage module are arranged on two sides opposite to each other.

[0016] Furthermore, a liquid cooling channel is provided inside the liquid cooling plate, and a liquid inlet and a liquid return port are provided on one side of the liquid cooling plate;

[0017] One end of the liquid cooling channel is connected to the liquid inlet, and the other end of the liquid cooling channel is connected to the liquid outlet;

[0018] The liquid inlet of each liquid cooling plate is also connected to the liquid supply branch pipe of the energy storage module through a connecting pipe, and the liquid return port of the liquid cooling plate is also connected to the liquid return branch pipe of the energy storage module through a connecting pipe.

[0019] Furthermore, the liquid cooling circulation module includes a circulation pipeline and a circulation controller. The circulation pipeline is provided with a liquid supply port, a liquid return port and a circulation pump. The liquid supply port is connected to the liquid supply main pipe, and the liquid return port is connected to the liquid return main pipe; the circulation controller is connected to the circulation pump.

[0020] Furthermore, a pressure sensor is provided on the circulation pipeline;

[0021] The pressure sensor is connected to the circulation controller.

[0022] Furthermore, a heat exchanger and a temperature sensor are provided on the circulation pipeline;

[0023] The temperature sensor is connected to the circulation controller;

[0024] The heat exchanger is connected to the refrigeration module.

[0025] Furthermore, the heat exchanger includes a heat exchange plate, a first pipeline and a second pipeline;

[0026] The first pipeline and the second pipeline are arranged in close contact;

[0027] The first pipeline is communicated with the circulation pipeline, and the second pipeline is communicated with the refrigeration module.

[0028] Furthermore, the refrigeration module includes a refrigeration pipeline;

[0029] The refrigeration pipeline includes the refrigeration main pipeline, liquid branch pipe and gas branch pipe;

[0030] The refrigeration main line is equipped with a gas-liquid separator and a compressor in the direction of circulation, and the rear end of the compressor is connected to the parallel liquid branch pipe and gas branch pipe;

[0031] A proportional valve is provided on the liquid branch pipe, and a condenser and a drying filter are provided on the gas branch pipe in sequence according to the circulation direction; a fan is provided outside the condenser.

[0032] Furthermore, a heating module is provided on the circulation pipeline;

[0033] The heating module is connected to the circulation controller.

[0034] Furthermore, a refrigeration cycle valve is provided on the refrigeration main line;

[0035] The refrigeration cycle valve is connected to the cycle controller.

[0036] The beneficial effects of the present invention are:

[0037] The liquid cooling system of the energy storage equipment provided by the utility model realizes liquid cooling and heat dissipation of the intensive energy storage system by allocating liquid cooling plates to the energy storage modules in the energy storage system according to the energy storage boxes, with good heat dissipation effect. A fan is introduced into the refrigeration module to realize the combination of liquid cooling and air cooling, further reducing the liquid cooling cost.

[0038] In addition, the utility model has a reliable design principle, a simple structure and a very wide application prospect. It can be seen that the utility model has substantial characteristics and progress compared with the prior art, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 This is a schematic diagram of the layout of the liquid cooling plates in the liquid cooling system of the energy storage device of the utility model.

[0041] Figure 2 It is a schematic diagram of the liquid cooling system circulation of the energy storage device of the present utility model.

[0042] Figure 3 It is a control schematic diagram of the liquid cooling system of the energy storage device of the present utility model.

[0043] Description of main reference numerals

[0044] 1. Liquid cooling circulation module, 2. Refrigeration module, 3. Liquid cooling plate, 4. Energy storage module, 5. Energy storage tank, 6. Liquid supply main pipe, 7. Liquid return main pipe, 8. Liquid supply branch pipe, 9. Liquid return branch pipe, 10. Circulation controller, 11. Circulation pump, 12. Pressure sensor, 13. Heat exchanger, 14. Temperature sensor; 15. Compressor, 16. Proportional valve, 17. Condenser, 18. Dry filter, 19. Fan; 20. Gas-liquid separator. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0046] See also Figure 1 The figure shows a liquid cooling system of an energy storage device in a specific implementation, including an energy storage cabin cabinet, liquid cooling pipelines, a liquid cooling circulation module 1, a refrigeration module 2 and a plurality of liquid cooling plates 3;

[0047] The energy storage compartment cabinet is provided with a number of energy storage modules 4 arranged in sequence;

[0048] Each energy storage module 4 includes a plurality of energy storage boxes 5 arranged vertically in layers;

[0049] Each energy storage box 5 is provided with a number of battery cells arranged in rows and columns in the same layer, and the battery cells are connected in series;

[0050] A liquid cooling plate 3 is provided at the bottom of the battery cells arranged in rows and columns of each energy storage box 5;

[0051] Each liquid cooling plate 3 is connected to the liquid cooling circulation module 1 through a liquid cooling pipeline;

[0052] The liquid cooling circulation module 1 is connected to the refrigeration module 2 .

[0053] It should be noted that, usually an energy storage module consists of 8 energy storage boxes arranged in layers, each energy storage box usually has 52 battery cells connected in series, and the 52 battery cells are arranged in rows and columns according to 4 columns and 13 rows.

[0054] In this embodiment, taking three energy storage modules as an example, the liquid cooling pipeline includes a liquid supply main pipe 6, a liquid return main pipe 7, three liquid supply branch pipes 8 and three liquid return branch pipes 9;

[0055] The liquid supply main pipe 6 and the liquid return main pipe 7 are arranged at the bottom of the energy storage compartment cabinet, and three liquid supply branch pipes 8 and three liquid return branch pipes 9 are arranged vertically;

[0056] Each energy storage module 4 corresponds to a liquid supply branch pipe 8 and a liquid return branch pipe 9. The lower part of each liquid supply branch pipe 8 is connected to the liquid supply main pipe 6, and the lower part of each liquid return branch pipe 9 is connected to the liquid return main pipe 7.

[0057] The liquid supply branch pipe 8 and the liquid return branch pipe 9 of each energy storage module 4 are arranged on both sides opposite to each other;

[0058] A liquid cooling channel is provided inside the liquid cooling plate 3, and a liquid inlet and a liquid return port are provided on one side of the liquid cooling plate 3;

[0059] One end of the liquid cooling channel is connected to the liquid inlet, and the other end of the liquid cooling channel is connected to the liquid outlet;

[0060] The liquid inlet of each liquid cooling plate 3 is also connected to the liquid supply branch pipe 8 of the corresponding energy storage module 4 through a connecting pipe, and the liquid return port of the liquid cooling plate 3 is also connected to the liquid return branch pipe 9 of the corresponding energy storage module 4 through a connecting pipe.

[0061] In certain embodiments, as Figure 2 and Figure 3 As shown, the liquid cooling circulation module 1 includes a circulation pipeline and a circulation controller 10. The circulation pipeline is provided with a liquid supply port, a liquid return port and a circulation pump 11. The liquid supply port is connected to the liquid supply main pipe 6, and the liquid return port is connected to the liquid return main pipe 7;

[0062] The circulation controller 10 is communicated with the circulation pump 11;

[0063] A pressure sensor 12 is also provided on the circulation pipeline;

[0064] The pressure sensor 12 is connected to the circulation controller 10;

[0065] The circulation pipeline is also provided with a heat exchanger 13 and a temperature sensor 14;

[0066] The temperature sensor 14 is connected to the circulation controller 10;

[0067] The heat exchanger 13 is connected to the refrigeration module 2;

[0068] The heat exchanger 13 includes a heat exchange plate, a first pipeline and a second pipeline;

[0069] The first pipeline and the second pipeline are arranged in close contact;

[0070] The first pipeline is connected to the circulation pipeline, and the second pipeline is connected to the refrigeration module 2;

[0071] The refrigeration module includes a refrigeration pipeline;

[0072] The refrigeration pipeline includes the refrigeration main pipeline, liquid branch pipe and gas branch pipe;

[0073] The refrigeration main line is provided with a gas-liquid separator 20 and a compressor 15 in sequence according to the circulation direction, and the rear end of the compressor 15 is connected to a liquid branch pipe and a gas branch pipe in parallel;

[0074] The liquid branch pipe is provided with a proportional valve 16, and the gas branch pipe is provided with a condenser 17 and a drying filter 18 in sequence according to the circulation direction;

[0075] A fan 19 is provided on the outside of the condenser 17;

[0076] It should be noted that the combination of liquid cooling and air cooling is achieved through the fan 19, which reduces the number of liquid cooling cycles and reduces the liquid cooling cost.

[0077] In some embodiments, a heating module is further provided on the circulation pipeline;

[0078] The heating module is connected to the circulation controller 10;

[0079] A refrigeration cycle valve is also provided on the refrigeration main line;

[0080] The refrigeration cycle valve is connected to the cycle controller 10;

[0081] It should be noted that in addition to requiring cooling, the battery compartment cannot work normally when the battery core temperature is too low. Therefore, the heating module can heat the liquid cooling medium in the circulation pipeline. At this time, the heating module needs to be started and the refrigeration module needs to be turned off through the refrigeration circulation valve.

[0082] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A liquid cooling system for an energy storage device, characterized in that: It includes energy storage cabinet, liquid cooling pipeline, liquid cooling circulation module, refrigeration module and several liquid cooling plates; The energy storage compartment cabinet is provided with a number of energy storage modules arranged in sequence; Each energy storage module includes a number of energy storage boxes arranged vertically in layers; Each energy storage box is equipped with a number of battery cells arranged in rows and columns on the same layer, and the battery cells are connected in series; A liquid cooling plate is provided under the battery cells arranged in rows and columns in each energy storage box; Each liquid cooling plate is connected to the liquid cooling circulation module through a liquid cooling pipeline; The liquid cooling circulation module is connected to the refrigeration module.

2. The liquid cooling system for energy storage equipment according to claim 1, wherein: The liquid cooling pipeline includes a liquid supply main pipe, a liquid return main pipe, a plurality of liquid supply branch pipes and a plurality of liquid return branch pipes; The liquid supply pipe and liquid return pipe are installed at the bottom of the energy storage tank cabinet, and each liquid supply branch pipe and each liquid return branch pipe are installed vertically; Each energy storage module corresponds to a liquid supply branch pipe and a liquid return branch pipe. The lower part of each liquid supply branch pipe is connected to the liquid supply main pipe, and each liquid return branch pipe is connected to the liquid return main pipe. The liquid supply branch pipe and the liquid return branch pipe of each energy storage module are arranged on two sides opposite to each other.

3. The liquid cooling system for energy storage equipment according to claim 2, wherein: There is a liquid cooling channel inside the liquid cooling plate, and a liquid inlet and a liquid return port are provided on one side of the liquid cooling plate; One end of the liquid cooling channel is connected to the liquid inlet, and the other end of the liquid cooling channel is connected to the liquid outlet; The liquid inlet of each liquid cooling plate is also connected to the liquid supply branch pipe of the energy storage module through a connecting pipe, and the liquid return port of the liquid cooling plate is also connected to the liquid return branch pipe of the energy storage module through a connecting pipe.

4. The liquid cooling system for energy storage equipment according to claim 2, wherein: The liquid cooling circulation module includes a circulation pipeline and a circulation controller. The circulation pipeline is provided with a liquid supply port, a liquid return port and a circulation pump. The liquid supply port is connected to the liquid supply main pipe, and the liquid return port is connected to the liquid return main pipe. The circulation controller is communicated with the circulation pump.

5. The liquid cooling system for energy storage equipment according to claim 4, characterized in that: There is also a pressure sensor on the circulation pipeline; The pressure sensor is connected to the circulation controller.

6. The liquid cooling system for energy storage equipment according to claim 4, wherein: The circulation pipeline is also equipped with a heat exchanger and a temperature sensor; The temperature sensor is connected to the circulation controller; The heat exchanger is connected to the refrigeration module.

7. The liquid cooling system for energy storage equipment according to claim 6, wherein: The heat exchanger includes a heat exchange plate, a first pipeline and a second pipeline; The first pipeline and the second pipeline are arranged in close contact; The first pipeline is communicated with the circulation pipeline, and the second pipeline is communicated with the refrigeration module.

8. The liquid cooling system for energy storage equipment according to claim 6, wherein: The refrigeration module includes a refrigeration pipeline; The refrigeration pipeline includes the refrigeration main pipeline, liquid branch pipe and gas branch pipe; The refrigeration main line is equipped with a gas-liquid separator and a compressor in the direction of circulation, and the rear end of the compressor is connected to the parallel liquid branch pipe and gas branch pipe; A proportional valve is provided on the liquid branch pipe, and a condenser and a drying filter are provided on the gas branch pipe in sequence according to the circulation direction; a fan is provided outside the condenser.

9. The liquid cooling system for energy storage equipment according to claim 6, wherein: A heating module is also provided on the circulation pipeline; The heating module is connected to the circulation controller.

10. The liquid cooling system for energy storage equipment according to claim 9, characterized in that: A refrigeration cycle valve is also provided on the refrigeration main line; The refrigeration cycle valve is connected to the cycle controller.

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