A method for preparing an integrated energy storage device

Abstract

The present invention relates to the field of energy storage technology, and discloses an integrated energy storage machine, including a battery compartment, a water tank, a heater, a cooling system and a controller. The battery compartment includes a battery pack, a liquid cooling plate and a pipeline; the controller controls the water temperature in the water tank through the cooling system according to the ambient temperature; the pipeline includes a liquid cooling pipeline, a fire protection pipeline and a sprinkler pipeline; a water pump and a control valve are connected and arranged on the pipeline, and the opening and closing of the liquid cooling pipeline and the fire protection pipeline are realized by opening and closing the control valve; the cooling system includes a compressor and a heat exchanger. The present invention effectively reduces the power consumption and use cost of the cooling system. The liquid cooling system and the fire protection system share some pipelines, which reduces the design cost of the integrated energy storage machine. The liquid cooling plate and the water sprinkler jointly continuously extinguish the abnormal battery pack and cool it down, preventing the battery pack from thermal expansion and re-ignition, and improving the safety of the integrated energy storage machine.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a method for preparing an integrated energy storage device. Background Art

[0002] Energy storage systems generally use air cooling or liquid cooling to directly cool and heat the battery system. However, when using air cooling or liquid cooling to directly cool the battery, there are problems with the high power design and energy consumption of the air conditioning or liquid cooling unit; at the same time, an additional fire protection system is required to ensure the safety of the energy storage system, which leads to high design and use costs. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a method for preparing an integrated energy storage machine, which solves the problems of high energy consumption and poor safety performance of the existing integrated energy storage machine.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] An integrated energy storage device includes a battery compartment, a water tank, a heater, a cooling system and a controller. The battery compartment includes a battery pack, a liquid cooling plate and a pipeline; the controller controls the water temperature in the water tank through the cooling system according to the ambient temperature; the pipeline includes a liquid cooling pipeline, a fire protection pipeline and a spray pipeline, and the spray pipeline is used to spray water on the battery pack; the pipeline is connected with a water pump and a control valve, and the opening and closing of the liquid cooling pipeline and the fire protection pipeline are realized by opening and closing the control valve; the cooling system includes a compressor, a heat exchanger and a water pump; when the water temperature is too low, the heater is started to heat the water in the water tank to prevent freezing; when the ambient temperature is low, the water in the water tank is cooled by heat exchange through the heat exchanger; when the ambient temperature is high, the water in the water tank is cooled by refrigeration by the compressor.

[0008] Preferably, a liquid cooling plate is arranged on the battery pack, and the spray pipe is arranged above the battery pack.

[0009] Preferably, a liquid replenishing port is provided on one side of the water tank, and a liquid level gauge is provided in the water tank; the battery compartment is a closed compartment, and a dehumidifier is installed in the battery compartment. When the humidity in the battery compartment is too high, the dehumidifier starts automatically or the controller starts to dehumidify the battery compartment.

[0010] Preferably, the thermal conductivity of the water tank material is less than 0.3 W / (m·K), and the amount of water in the water tank is 0.1 to 10 times the amount of water required to control a thermal runaway battery pack.

[0011] Preferably, the liquid cooling pipeline includes a coolant inlet main pipe, a coolant inlet branch pipe, a coolant return branch pipe and a coolant return main pipe; the coolant inlet branch pipe is a plurality of branch pipes branched from the coolant inlet main pipe, the coolant inlet branch pipe is connected to the liquid inlet of the liquid cooling plate, and the liquid outlet of the liquid cooling plate is connected to the water tank through a plurality of coolant return branch pipes in cooperation with the coolant return main pipe.

[0012] Preferably, the fire-fighting pipeline includes a fire-fighting branch pipe and a fire-fighting main pipe connected to a water tank, the fire-fighting main pipe is connected to the fire-fighting branch pipes matched one by one with the battery packs, a plurality of the sprinkler pipes are provided on the fire-fighting branch pipes, and a water receiving trough is arranged at the bottom of the battery compartment, the water receiving trough is used to collect the fire-fighting liquid sprayed from the sprinkler pipes, and the collected fire-fighting liquid is re-pumped into the water tank through the water pump and the coolant return main pipe.

[0013] A method for preparing an integrated energy storage device, comprising the following steps:

[0014] (1) Install control valve 1 into the liquid cooling pipeline and connect it to the water inlet of the battery pack;

[0015] (2) Install control valve 2 to the fire protection pipeline and connect it to the sprinkler pipe;

[0016] (3) Connect the cooling system to the water tank and the battery compartment;

[0017] (4) Install the dehumidifier in the battery compartment;

[0018] (5) Install the heater and liquid level gauge in the water tank, and install the temperature sensor outside the cabinet, in the water tank, and in the battery compartment respectively;

[0019] (6) Use communication lines to connect the control valve, cooling water pump, heater and liquid level meter in the water tank, fan and compressor in the cooling system, dehumidifier and controller;

[0020] (7) When the battery temperature exceeds the set threshold 1, the controller opens control valve 1, closes control valve 2, starts the cooling system, provides coolant to the liquid cooling plate, and heats or cools the battery pack;

[0021] (8) When the battery temperature exceeds the set threshold 2, the controller opens control valve 1, closes control valve 2, starts the cooling system, and the coolant enters the spray pipe and is sprayed out from the spray port to extinguish the battery pack and cool it down. The circulating water pump is started with a delay to pump the spray water back into the water tank for recycling.

[0022] Preferably, the method further comprises the following steps:

[0023] (9) When the coolant temperature is lower than the set threshold value 3, the controller turns on the heater in the water tank to heat the coolant to above the freezing point;

[0024] (10) When the ambient temperature is within the set threshold 4, the controller turns on the fan in the cooling system to cool the coolant in the water tank;

[0025] (11) When the ambient temperature exceeds the set threshold value 5, the controller turns on the fan and compressor in the cooling system to cool the coolant in the water tank;

[0026] (12) When the humidity in the battery compartment exceeds the set threshold value 6, the dehumidifier automatically starts or the controller starts to dehumidify the battery compartment.

[0027] (III) Beneficial effects

[0028] The present invention has the following beneficial effects:

[0029] The preparation method of the integrated energy storage device, when the battery temperature is high, opens the corresponding control valve on the liquid cooling pipeline to liquid-cool the battery pack; when the battery temperature is too high, opens the corresponding control valve on the fire protection pipeline, and uses the spray pipeline to extinguish the fire and cool the battery pack; uses the liquid cooling plate and water spray to continuously extinguish and cool the abnormal battery pack, prevents the battery pack from thermal expansion and re-ignition, and improves the safety of the integrated energy storage device. When the ambient temperature is low, the water is cooled by the heat exchanger to save energy and reduce consumption. A low-power cooling system is used for long-term cooling / heating during valley power, and the water is stored in a water tank, which reduces the design power and use cost of the cooling system; by controlling the two control valves on the liquid cooling pipeline and the fire protection pipeline, the liquid cooling system and the fire protection system share some pipelines, reducing the design cost of the integrated energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the energy storage integrated machine of the present invention;

[0031] Figure 2 This is a schematic diagram of another connection method of the liquid cooling system in the energy storage integrated machine of the present invention.

[0032] In the figure: 1. Water tank; 11. Liquid filling port; 12. Liquid level gauge; 13. Heater; 2. Cooling system; 21. Compressor; 22. Heat exchanger; 23. Fan; 3. Battery compartment; 31. Battery pack; 32. Liquid cooling plate; 33. Coolant inlet main pipe; 34. Coolant inlet branch pipe; 35. Coolant return branch pipe; 36. Coolant return main pipe; 37. Fire main pipe; 38. Fire branch pipe; 39. Sprinkler pipe; 310. Water tank; 311. Dehumidifier. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 The present invention provides a technical solution: an energy storage integrated machine, including a battery compartment 3, a water tank 1, a heater 13, a cooling system 2 and a controller. The battery compartment 3 includes a battery pack 31, a liquid cooling plate 32 and a pipeline. The controller controls the water temperature in the water tank 1 through the cooling system 2 according to the ambient temperature; the pipeline includes a liquid cooling pipeline, a fire protection pipeline and a spray pipeline. The spray pipeline is used to spray water to extinguish fire and cool the battery pack 31. A water pump and a control valve are connected on the pipeline. The opening and closing of the liquid cooling pipeline and the fire protection pipeline are realized by opening and closing the control valve; the cooling system 2 includes a compressor 21, a heat exchanger 22 and a water pump. When the water temperature is too low, the heater 13 is started to heat the water in the water tank 1 to prevent freezing; when the ambient temperature is low, the water in the water tank 1 is cooled by heat exchange through the heat exchanger 22; when the ambient temperature is high, the water in the water tank 1 is cooled by refrigeration through the compressor 21.

[0035] The energy storage integrated machine of the present invention, when the battery temperature is high, opens the control valve 1 on the liquid cooling pipeline, closes the control valve 2, and performs liquid cooling on the battery pack 31; when the battery temperature is too high, opens the control valve 2 on the fire protection pipeline, closes the control valve 1, and sprays water around the battery pack 31 through the spray pipe 39; uses the liquid cooling plate 32 and the water spray to continuously extinguish and cool the abnormal battery pack 31, prevents the battery pack 31 from thermal expansion and re-ignition, and improves the safety performance of the energy storage integrated machine. When the ambient temperature is low, the water is cooled only through the heat exchanger 22, which saves energy and reduces consumption.

[0036] In this embodiment, a liquid cooling plate 32 is arranged on the battery pack 31, and a spray pipe 39 is arranged above the battery pack 31. Figure 1 and 2 As shown, when the energy storage device is working normally, the controller starts the cooling water pump, closes control valve 2, opens control valve 1, and passes cooling liquid to each liquid cooling plate 32 through the liquid cooling pipeline to cool the battery pack 31; when a fire occurs, the controller opens control valve 2 and closes control valve 1, and the coolant becomes fire fighting liquid, which is used to spray the battery pack 31 for fire extinguishing and cooling. The spray water is pumped into the water tank 1 through the circulating water pump for recycling.

[0037] In this embodiment, a liquid replenishing port 11 is provided on one side of the water tank 1, a liquid level gauge 12 is provided in the water tank 1, the battery compartment 3 is a closed compartment, and a dehumidifier 311 and a humidity sensor are installed in the battery compartment 3. When the humidity in the battery compartment 3 is too high, the dehumidifier 311 automatically starts or the controller starts to dehumidify the battery compartment 3. The liquid level gauge 12 provided in the water tank 1 will alarm to replenish the coolant when the liquid level is lower than the set value. The coolant can be deionized water, or a non-flammable liquid with high specific heat capacity, low freezing point, high boiling point, low viscosity. The dehumidifier 311 is used to reduce the humidity in the battery compartment 3 to prevent condensation water from appearing on the surface of the liquid cooling plate.

[0038] In this embodiment, the thermal conductivity of the water tank 1 material is less than 0.3W / (m·K), and the water volume of the water tank 1 can control 0.1 to 10 times the water volume required for a thermal runaway battery pack 31. Figure 1 and 2 As shown, the cold storage capacity of the water tank 1 can at least meet the cooling capacity of all battery packs 31 during one discharge, thereby preventing heat from spreading to the entire energy storage device when any battery pack 31 has thermal runaway.

[0039] In this embodiment, the liquid cooling pipeline includes a coolant inlet main pipe 33, a coolant inlet branch pipe 34, a coolant return branch pipe 35 and a coolant return main pipe 36. The coolant inlet branch pipe 34 is connected to the liquid inlet of the liquid cooling plate 32, and the liquid outlet of the liquid cooling plate 32 is connected to the water tank 1 through several coolant return branch pipes 35 and the coolant return main pipe 36.

[0040] In this embodiment, the fire-fighting pipeline includes a fire-fighting main pipe 37 connected to the water tank 1, the fire-fighting main pipe 37 is connected to the fire-fighting branch pipes 38 matched one by one with the battery packs 31, and the fire-fighting branch pipes 38 are connected to a plurality of sprinkler pipes 39. A water receiving tank 310 is arranged at the bottom of the battery compartment 3, and the water receiving tank 310 is used to collect the fire-fighting liquid sprayed by the sprinkler pipes 39. Figure 1 and 2 As shown, the controller opens control valve 2 and closes control valve 1, and the coolant becomes fire-fighting liquid, which sprays the battery pack 31 to extinguish the fire and cool it down. The spray water is collected in the water receiving tank 310 and pumped into the water tank 1 for recycling through the circulating water pump.

[0041] A method for preparing an integrated energy storage device, comprising preparing an integrated energy storage device as in any one of the above embodiments by the following steps:

[0042] (1) After installing the control valve 1 to the liquid cooling pipeline, connect it to the water inlet of the battery pack 31;

[0043] (2) Install control valve 2 to the fire protection pipeline and connect it to the sprinkler pipe;

[0044] (3) Use pipes to connect the cooling system 2 with the water tank 1 and the battery compartment 3;

[0045] (4) Install the dehumidifier 311 in the battery compartment 3;

[0046] (5) Install the heater 13 and the liquid level meter 12 in the water tank 1, and install the temperature sensor outside the cabinet, inside the water tank 1 and the battery compartment 3;

[0047] (6) Use a communication line to connect the control valve, cooling water pump, heater 13 and liquid level meter in water tank 1, fan 23 and compressor in cooling system 2, dehumidifier 311 and temperature sensor to the controller to form an energy storage integrated machine;

[0048] (7) When the battery temperature exceeds the set threshold 1, the controller opens control valve 1, closes control valve 2, starts cooling system 2, provides cooling liquid to the liquid cooling plate 32, and heats or cools the battery pack 31;

[0049] (8) When the battery temperature exceeds the set threshold value 2, the controller opens control valve 2, closes control valve 1, starts the cooling water pump, and the coolant enters the spray pipe 39 and is sprayed out from the spray port to extinguish the fire and cool the battery pack 31. The circulating water pump is started with a delay to pump the spray water back into the water tank 1 for recycling.

[0050] In this embodiment, the following steps are also included:

[0051] (9) When the coolant temperature is lower than the set threshold value 3, the controller turns on the heater 13 in the water tank 1 to heat the coolant to above the freezing point;

[0052] (10) When the ambient temperature is within the set threshold value 4, the controller turns on the fan 23 in the cooling system 2 to cool the coolant in the water tank 1;

[0053] (11) When the ambient temperature exceeds the set threshold value 5, the controller turns on the fan 23 and the compressor 21 in the cooling system 2 to cool the coolant in the water tank 1;

[0054] (12) When the humidity in the battery compartment 3 exceeds the set threshold 6, the dehumidifier 311 automatically starts or the controller starts to dehumidify the battery compartment 3.

[0055] Reference Figure 1 and 2 As shown, a low-power cooling system 2 can be used for long-term cooling / heating during off-peak hours and stored in a water tank 1, thereby reducing the design power of the cooling system 2 and the system use cost; by controlling the two control valves on the liquid cooling pipeline and the fire protection pipeline, the liquid cooling system and the fire protection system can share some pipelines, thereby reducing the design cost of the energy storage integrated machine.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated energy storage device, comprising a battery compartment, a water tank, a heater, a cooling system and a controller, wherein the battery compartment comprises a battery pack, a liquid cooling plate and a pipeline, characterized in that: The controller controls the water temperature in the water tank through the cooling system according to the ambient temperature; the pipeline includes a liquid cooling pipeline, a fire protection pipeline and a spray pipeline, and the spray pipeline is used to spray water on the surface of the battery pack; a water pump and a control valve are connected and arranged on the pipeline, and the opening and closing of the liquid cooling pipeline and the fire protection pipeline are realized by opening and closing the control valve; the cooling system includes a compressor, a heat exchanger and a water pump. When the water temperature is too low, the heater is started to heat the water in the water tank to prevent freezing; when the ambient temperature is low, the water in the water tank is cooled by heat exchange through the heat exchanger; when the ambient temperature is high, the water in the water tank is cooled by refrigeration by the compressor.

2. The energy storage integrated device according to claim 1, characterized in that: A liquid cooling plate is arranged on the battery pack, and the spray pipeline is arranged above the battery pack.

3. The energy storage integrated machine according to claim 1, characterized in that: A liquid replenishing port is arranged on one side of the water tank, and a liquid level meter is arranged in the water tank.

4. The energy storage integrated machine according to claim 3, characterized in that: The thermal conductivity of the water tank material is less than 0.3 W / (m·K), and the amount of water in the water tank is 0.1 to 10 times the amount of water required to control a thermal runaway battery pack.

5. The energy storage integrated machine according to claim 1, characterized in that: The battery compartment is a sealed compartment, in which a dehumidifier and a humidity sensor are installed. When the humidity in the battery compartment is too high, the dehumidifier automatically starts or the controller starts to dehumidify the battery compartment.

6. The energy storage integrated machine according to claim 1, characterized in that: The liquid cooling pipeline includes a coolant inlet main pipe, a coolant inlet branch pipe, a coolant return branch pipe and a coolant return main pipe. The coolant inlet branch pipes are a plurality of branch pipes branched from the coolant inlet main pipe. The coolant inlet branch pipes are connected to the liquid inlet of the liquid cooling plate, and the liquid outlet of the liquid cooling plate is connected to the coolant return branch pipe, and the coolant return main pipe is connected to the water tank.

7. The energy storage integrated machine according to claim 5, characterized in that: The fire-fighting pipeline includes a fire-fighting branch pipe and a fire-fighting main pipe connected to a water tank, the fire-fighting main pipe is connected to fire-fighting branch pipes matched one by one with the battery packs, and a plurality of the sprinkler pipes are connected to the fire-fighting branch pipes; a water receiving trough is arranged at the bottom of the battery compartment, the water receiving trough is used to collect the fire-fighting liquid sprayed from the sprinkler pipe, and the collected fire-fighting liquid is pumped back into the water tank through a water pump and the coolant return main pipe.

8. A method for preparing an integrated energy storage device, characterized in that: The energy storage integrated device as claimed in any one of claims 1 to 7 is prepared by the following steps: (1) Install control valve 1 into the liquid cooling pipeline and connect it to the water inlet of the battery pack; (2) Install control valve 2 on the fire protection pipeline and connect it to the sprinkler pipeline; (3) Connect the cooling system to the water tank and the battery compartment; (4) Install the dehumidifier in the battery compartment; (5) Install the heater and liquid level gauge in the water tank, and install the temperature sensor outside the cabinet, in the water tank, and in the battery compartment respectively; (6) Use communication lines to connect the control valve, cooling water pump, heater and liquid level meter in the water tank, fan and compressor in the cooling system, dehumidifier and controller; (7) When the battery temperature exceeds the set threshold 1, the controller opens control valve 1, closes control valve 2, starts the cooling system, provides coolant to the liquid cooling plate, and heats or cools the battery pack; (8) When the battery temperature exceeds the set threshold 2, the controller opens control valve 2, closes control valve 1, starts the cooling system, and the coolant enters the spray pipe and is sprayed out from the spray port to extinguish the battery pack and cool it down. The circulating water pump is started with a delay to pump the spray water into the water tank for recycling.

9. The method for preparing an integrated energy storage device according to claim 8, characterized in that: The following steps are also included: (9) When the coolant temperature is lower than the set threshold value 3, the controller turns on the heater in the water tank to heat the coolant to above the freezing point; (10) When the ambient temperature is within the set threshold 4, the controller turns on the fan in the cooling system to cool the coolant in the water tank; (11) When the ambient temperature exceeds the set threshold value 5, the controller turns on the fan and compressor in the cooling system to cool the coolant in the water tank; (12) When the humidity in the battery compartment exceeds the set threshold value 6, the dehumidifier automatically starts or the controller starts to dehumidify the battery compartment.

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