CN217848101U - Automatic cooling system of liquid cooling energy storage equipment - Google Patents

Abstract

The utility model provides a liquid cooling energy storage equipment automatic cooling system, liquid cooling energy storage equipment automatic cooling system includes the outer machine of cooling water set, energy storage cabinet, liquid cooling. The utility model provides a liquid cooling energy storage equipment automatic cooling system has first three-way valve through the liquid outlet at the liquid return pipe and the inlet department intercommunication of the outer machine of liquid cooling and evaporimeter, liquid outlet and the inlet of condenser and the intercommunication of feed liquor pipe department have the second three-way valve outside the liquid cooling, can be when the inside heat of energy storage cabinet is higher, through adjusting first three-way valve and second three-way valve, make the secondary refrigerant carry to the energy storage cabinet inside after through the evaporimeter cooling, and the evaporimeter can carry to the inside cooling of condenser through the outer machine of liquid cooling, and can be when the outer machine of liquid cooling locates ambient temperature lower, can directly carry to the inside cooling of energy storage cabinet through the secondary refrigerant after adjusting first three-way valve and second three-way valve messenger outer machine of liquid cooling, the energy consumption of water chilling unit is saved, energy saving and consumption reduction's effect is played.

Description

Automatic cooling system of liquid cooling energy storage equipment

Technical Field

The utility model belongs to the technical field of the energy storage equipment refrigeration, concretely relates to liquid cooling energy storage equipment automatic cooling system.

Background

Inside large-scale energy storage equipment, be provided with the battery module, can produce a large amount of heats in the battery module working process. Consequently need be equipped with corresponding heat sink in energy storage equipment usually, the mode that present efficient heat sink adopted the liquid cooling generally cools down to the battery module, through being provided with the heat exchange tube in energy storage equipment is inside, carries the lower secondary refrigerant of temperature to the inside battery module that cools down of energy storage equipment. The secondary refrigerant is cooled through external refrigeration equipment and then conveyed into the energy storage equipment, the secondary refrigerant is cooled through the combined action of a water chilling unit and a liquid cooling outer unit, and a cold water pipe in the condenser is used for cooling the secondary refrigerant in the condenser through external cold air or a spraying system. When the external temperature is low, the effect of cooling the energy storage equipment can be achieved only by heat exchange between the external temperature and the secondary refrigerant, the existing cooling device cannot reasonably utilize the external low-temperature environment, and the water chilling unit still needs to normally work, so that the energy consumption of a refrigeration system in the energy storage equipment is high, and the energy efficiency is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a liquid cooling energy storage equipment automatic cooling system aims at solving among the prior art energy storage equipment problem that the energy consumption is big, the efficiency is low at the operation in-process refrigerating system energy consumption.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is an automatic cooling system of a liquid cooling energy storage device, comprising:

the water chilling unit comprises an evaporator and a condenser;

the cooling heat exchanger used for cooling the battery module in the energy storage cabinet is arranged in the energy storage cabinet, a liquid inlet pipe is communicated with a liquid inlet of the cooling heat exchanger, a liquid outlet of the cooling heat exchanger is communicated with a liquid return pipe, and the liquid inlet pipe is communicated with a liquid outlet of the evaporator;

the liquid cooling outdoor unit is communicated with a liquid outlet of the liquid return pipe through a first three-way valve, the other two interfaces of the first three-way valve are respectively communicated with a liquid inlet of the liquid cooling outdoor unit and a liquid inlet of the evaporator, the liquid outlet of the liquid cooling outdoor unit is communicated with a second three-way valve, the other two interfaces of the second three-way valve are respectively communicated with a liquid inlet of a condenser and the liquid inlet pipe, and a liquid outlet of the condenser is communicated with a liquid inlet of the liquid cooling outdoor unit;

the inlet department of condenser is provided with and is used for carrying the secondary refrigerant extremely the inside first water pump of condenser, be provided with on the feed liquor pipe be used for to the inside second water pump of carrying the secondary refrigerant of energy storage cabinet.

In a possible implementation manner, the first three-way valve and the second three-way valve are both electric three-way valves, the first three-way valve and the second three-way valve are electrically connected with a controller for controlling the working states of the first three-way valve and the second three-way valve, the liquid inlet pipe and the liquid return pipe are respectively provided with a first temperature sensor and a second temperature sensor which are electrically connected with the controller, and the controller is electrically connected with the first water pump and the second water pump for controlling the working states of the first water pump and the second water pump.

In one possible implementation, the liquid-cooled external unit includes:

the refrigeration room, the indoor spray set that is used for cooling the secondary refrigerant that is provided with of refrigeration, spray set with controller electric connection, still be provided with in the refrigeration room be used for with the first passageway of refrigeration room and external intercommunication, the air outlet department of first passageway be provided with controller electric connection's fan.

In a possible implementation manner, a third temperature sensor and a fourth temperature sensor electrically connected with the controller are respectively arranged at the liquid inlet and the liquid outlet of the liquid cooling outdoor unit.

In a possible implementation manner, the energy storage cabinet is multiple, the cooling heat exchangers in the multiple battery modules are all communicated with the liquid inlet pipe and the liquid return pipe, an electric flow regulating valve and a fifth temperature sensor are arranged at a liquid outlet of each cooling heat exchanger, and the electric flow regulating valve and the fifth temperature sensor are all electrically connected with the controller.

In a possible implementation manner, a temperature and humidity sensor used for measuring the internal environment temperature of the energy storage cabinet and a sixth temperature sensor used for measuring the internal environment temperature of the battery module are arranged inside the energy storage cabinet, and the temperature and humidity sensor and the sixth temperature sensor are electrically connected with the controller.

In a possible implementation manner, an energy storage water tank for containing cooling liquid is arranged at the liquid inlet of the liquid inlet pipe, and a heating device electrically connected with the controller is arranged inside the energy storage water tank.

In a possible implementation manner, a first pressure sensor is communicated with a liquid outlet of the second water pump, and the first pressure sensor is electrically connected with the controller.

In a possible implementation manner, a heat exchanger used for cooling the gas in the first channel is further arranged in the first channel, a spray pipe is arranged above the heat exchanger, and the spray pipe is communicated with a water outlet of the spray device.

In a possible implementation manner, a second channel for accelerating the heat exchange rate of the heat exchanger is arranged on the heat exchanger, one end of the second channel is communicated with the outside of the refrigeration chamber, and the other end of the second channel is communicated with the air inlet of the fan.

Compared with the prior art, the scheme shown in the embodiment of the application comprises a water chilling unit, the water chilling unit comprises an evaporator and a condenser, the evaporator is used for cooling the secondary refrigerant returned in the energy storage cabinet, and the effect of cooling and heat exchange in the energy storage cabinet is achieved. When the external temperature is higher, the external temperature can not meet the requirement of cooling the energy storage cabinet for cooling the secondary refrigerant, the water chilling unit is opened, the liquid return pipe is communicated with the liquid inlet of the evaporator by controlling the first three-way valve and the second three-way valve, the liquid outlet of the liquid cooling outdoor unit is communicated with the liquid inlet of the condenser, the water chilling unit is enabled to enter a working state, and the first water pump and the second water pump are opened to provide sufficient cooling liquid for the energy storage cabinet. When the external temperature is lower, only the liquid cooling outer unit is needed to meet the refrigeration effect on the interior of the energy storage cabinet, the liquid outlet of the liquid cooling outer unit is communicated with the liquid inlet pipe by controlling the first three-way valve and the second three-way valve, the liquid return pipe is communicated with the liquid inlet of the liquid cooling outer unit, only the second water pump is opened and the water chilling unit is closed, and the secondary refrigerant conveyed by the liquid cooling outer unit can meet the requirement of cooling heat generated by the battery module in the energy storage cabinet. The power consumption generated by the water chilling unit and the first water pump can be saved. Make whole liquid cooling energy storage equipment automatic cooling system can be according to external environment temperature's change, can satisfy when cooling down the heat that produces the inside battery module of energy storage cabinet, make entire system can reach the minimum energy consumption, reduce the consumption of the energy, save the cost.

Drawings

Fig. 1 is a schematic structural diagram of an automatic cooling system of a liquid-cooled energy storage device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a water chilling unit according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a liquid cooling outdoor unit according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the energy storage cabinet provided by the embodiment of the present invention.

Description of reference numerals:

1. a water chilling unit; 11. an evaporator; 12. a condenser; 13. a first three-way valve; 14. a second three-way valve; 15. a first water pump; 151. a second pressure sensor; 16. a second water pump; 161. a first pressure sensor; 17. a reservoir; 171. a heating device; 2. an energy storage cabinet; 21. cooling the heat exchanger; 22. a liquid inlet pipe; 221. a first temperature sensor; 23. a liquid return pipe; 24. a fifth temperature sensor; 25. an electric flow regulating valve; 26. a temperature and humidity sensor; 27. a sixth temperature sensor; 231. a second temperature sensor; 3. a liquid-cooled external unit; 31. a refrigeration compartment; 311. a first channel; 312. a fan; 313. a third temperature sensor; 314. a fourth temperature sensor; 315. a second channel; 32. a spraying device; 321. a water spraying pipe; 322. a shower pipe; 33. a heat exchanger; 4. a controller; 41. a central control unit; 42. a first control unit; 43. a second control unit; 44. a third control unit.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the automatic cooling system of the liquid-cooled energy storage device according to the present invention will now be described. The automatic cooling system of the liquid cooling energy storage equipment comprises a water chilling unit 1, an energy storage cabinet 2 and a liquid cooling external unit 3. The water chilling unit 1 comprises an evaporator 11 and a condenser 12; a cooling heat exchanger 21 for cooling the battery module in the energy storage cabinet 2 is arranged in the energy storage cabinet 2, a liquid inlet pipe 22 is communicated with a liquid inlet of the cooling heat exchanger 21, a liquid outlet of the cooling heat exchanger 21 is communicated with a liquid return pipe 23, and the liquid inlet pipe 22 is communicated with a liquid outlet of the evaporator 11; a liquid outlet of the liquid-cooled outdoor unit 3 is communicated with a first three-way valve 13, the other two interfaces of the first three-way valve 13 are respectively communicated with a liquid inlet of the liquid-cooled outdoor unit 3 and a liquid inlet of the evaporator 11, the liquid outlet of the liquid-cooled outdoor unit 3 is communicated with a second three-way valve 14, the other two interfaces of the second three-way valve 14 are respectively communicated with a liquid inlet of the condenser 12 and a liquid inlet pipe 22, and a liquid outlet of the condenser 12 is communicated with a liquid inlet of the liquid-cooled outdoor unit 3; a first water pump 15 for conveying the secondary refrigerant to the interior of the condenser 12 is arranged at the liquid inlet of the condenser 12, and a second water pump 16 for conveying the secondary refrigerant to the interior of the energy storage cabinet 2 is arranged on the liquid inlet pipe 22.

Compared with the prior art, the automatic cooling system of liquid cooling energy storage equipment that this embodiment provided, through being provided with cooling water set 1, cooling water set 1 includes evaporimeter 11 and condenser 12, and evaporimeter 11 is used for cooling to the inside high temperature secondary refrigerant who returns of energy storage cabinet 2, reaches the effect to 2 inside heat exchanges of cooling of energy storage cabinet. When the external temperature is high, the external temperature cannot meet the requirement for cooling the energy storage cabinet 2 by cooling the secondary refrigerant, the water chilling unit 1 is opened, the liquid return pipe 23 is communicated with the liquid inlet of the evaporator 11 by controlling the first three-way valve 13 and the second three-way valve 14, the liquid outlet of the liquid cooling outdoor unit 3 is communicated with the liquid inlet of the condenser 12, the water chilling unit 1 is enabled to enter the working state, and the first water pump 15 and the second water pump 16 are opened to provide sufficient cooling liquid for the energy storage cabinet 2. When the external temperature is low, only the liquid cooling outer unit 3 is needed to satisfy the refrigeration effect on the interior of the energy storage cabinet 2, the liquid outlet of the liquid cooling outer unit 3 is communicated with the liquid inlet pipe 22 by controlling the first three-way valve 13 and the second three-way valve 14, the liquid return pipe 23 is communicated with the liquid inlet of the liquid cooling outer unit 3, only the second water pump 16 is opened and the water chilling unit 1 is closed, and the secondary refrigerant conveyed by the liquid cooling outer unit 3 can satisfy the requirement of cooling the heat generated by the battery module in the energy storage cabinet 2. The power consumption generated by the water chilling unit 1 and the first water pump 15 can be saved. Make whole liquid cooling energy storage equipment automatically cooling system can be according to external environment temperature's change, can satisfy when cooling down the heat that 2 internal battery modules of energy storage cabinet produced, make entire system can reach the minimum energy consumption, reduce the consumption of the energy, save the cost.

Specifically, in this embodiment, the water chilling unit 1 further includes a compressor and a throttling mechanism, the throttling mechanism may be an expansion valve, when the water chilling unit 1 is in operation, a refrigerant is cooled by the condenser 12 to become a low-temperature high-pressure liquid, and the low-temperature high-pressure liquid is changed by the throttling mechanism to become a low-temperature low-pressure liquid, and then enters the evaporator 11 to exchange heat with a secondary refrigerant inside the cooling heat exchanger to become a low-temperature low-pressure gas, and the low-temperature low-pressure gas is conveyed to the compressor, and is changed into a high-temperature high-pressure gas by the compressor, and the high-temperature high-pressure gas is conveyed to the inside of the condenser 12 to be cooled and circulated.

In some embodiments, the water chiller 1 may be configured as shown in fig. 1 and 2. Referring to fig. 1 and 2, the first three-way valve 13 and the second three-way valve 14 are electric three-way valves, the first three-way valve 13 and the second three-way valve 14 are electrically connected to a controller 4 for controlling the operating states of the first three-way valve 13 and the second three-way valve 14, the liquid inlet pipe 22 and the liquid return pipe 23 are respectively provided with a first temperature sensor 221 and a second temperature sensor 231 which are electrically connected to the controller 4, and the controller 4 is electrically connected to the first water pump 15 and the second water pump 16 for controlling the operating states of the first water pump 15 and the second water pump 16. In this embodiment, the controller 4 includes a first control unit 42 for monitoring and controlling the state of the liquid-cooled external unit 3, a second control unit 43 for monitoring and controlling the water chilling unit 1, and a third control unit 44 for controlling the coolant delivery condition inside the energy storage cabinet 2. And a central control unit 41 electrically connected to the first control unit 42, the second control unit 43, and the third control unit 44. When the liquid cooling system operates, the first temperature sensor 221 and the second temperature sensor 231 detect the temperatures of the coolant in the liquid inlet pipe 22 and the liquid outlet pipe respectively and feed back the temperatures to the second control unit 43, the second control unit 43 sets the highest value and the lowest value of the second temperature sensor 231, when the second temperature sensor 231 senses that the temperature in the liquid return pipe 23 exceeds the highest value, the second control unit 43 sends a control command and controls the first three-way valve 13 to communicate the liquid return pipe 23 with the liquid inlet of the evaporator 11, and the second three-way valve 14 communicates the liquid outlet of the liquid cooling external unit 3 with the liquid inlet of the condenser 12. And simultaneously turning on the first water pump 15 and the second water pump 16, the second control unit 43 sends a signal to the central control unit 41, and the central control unit 41 controls the liquid-cooled external unit 3 to be in the on working state. On the contrary, when the second temperature sensor 231 senses that the temperature of the secondary refrigerant in the liquid return pipe 23 is lower than the set minimum value, the second control unit 43 controls the first three-way valve 13 to communicate with the liquid return pipe 23 and the liquid inlet of the liquid cooling outdoor unit 3, the second three-way valve 14 communicates with the liquid outlet of the liquid cooling outdoor unit 3 and the liquid inlet pipe 22, the first water pump 15 is turned off, the second water pump 16 is turned on, and only the liquid cooling outdoor unit 3 needs to exchange heat and cool the secondary refrigerant, and the secondary refrigerant is conveyed to the inside of the energy storage cabinet 2, so that the effect of automatic control and energy conservation is achieved.

In some embodiments, the liquid-cooled outdoor unit 3 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3 together, the liquid-cooled outdoor unit 3 includes a refrigeration chamber 31, a spraying device 32 for cooling the secondary refrigerant is disposed in the refrigeration chamber 31, the spraying device 32 is electrically connected to the controller 4, a first passage 311 for communicating the refrigeration chamber 31 with the outside is further disposed in the refrigeration chamber 31, and a fan 312 electrically connected to the controller 4 is disposed at an air outlet of the first passage 311. The spraying device 32 is electrically connected to the first control unit 42, and in this embodiment, the secondary refrigerant is cooled by the external air cooling and the spraying device 32, so that natural resources are reasonably utilized to cool the secondary refrigerant.

Optionally, in this embodiment, an air heat exchanger 33 is installed at an air inlet of the first passage 311, the air inlet of the air heat exchanger 33 is communicated with the outside, an air outlet of the air heat exchanger 33 is connected with an air inlet of the fan 312, and a gas flow passage of the air heat exchanger 33 forms a second passage 315. And a spray pipe 322 communicating with the liquid outlet of the spray device 32 is installed above the air heat exchanger 33. The secondary refrigerant can be sprayed to the upper part of the air heat exchanger 33, so that the air heat exchanger 33 is cooled and the air in the first channel 311 is cooled, and therefore the secondary refrigerant flowing into the liquid cooling outdoor unit 3 is effectively cooled, and the efficiency is improved.

Optionally, in this embodiment, the spraying device 32 includes: the water storage tank 17 is installed at the bottom of the refrigerating chamber 31 and is communicated with the inside of the refrigerating chamber 31, the refrigerating chamber 31 is internally provided with a refrigerating pipe for circulating secondary refrigerant output from the energy storage cabinet 2, and the water spraying pipe 321 is installed above the refrigerating pipe. The water inlet pipe of the water delivery pump is communicated with the reservoir 17, and the water outlet pipe of the water delivery pump is communicated with the water spraying pipe 321 and the spraying pipe 322. Fan 312 installs at the top of refrigeration room 31 to fan 312's air intake department is provided with the breakwater, and the breakwater slope sets up in fan 312's air intake department, and the air outlet of second passageway 315 is located the below of breakwater, can cool down the vapour that first passageway 311 flows out to recondenstion flow to cistern 17 inside, the air intake department of second passageway 315 also is located the top of cistern 17 and communicates with cistern 17 simultaneously. A side wall of the second channel 315 close to the inside of the refrigeration compartment 31 extends toward the inside of the reservoir 17 and is provided with a gap for circulating the coolant with the bottom of the reservoir 17.

Optionally, an electric shutter is further disposed at the air outlet of the second passage 315, and a seventh temperature sensor is further disposed at the outer side of the liquid-cooled external unit 3, the seventh temperature sensor is electrically connected to the first control unit 42 and configured to send a monitoring signal to the first control unit 42, and the electric shutter is electrically connected to the first control unit 42, so that the first control unit 42 can control the opening and closing degree of the electric shutter. When the outside temperature is high, the opening and closing degree of the electric louver can be increased, and the flow rate of the gas in the second passage 315 is increased, so that the cooling of the gas in the first passage 311 is increased. The liquid cooling outer machine 3 can cool the secondary refrigerant with the maximum efficiency.

In some embodiments, the liquid-cooled outdoor unit 3 may have a structure as shown in fig. 1, 2, and 3. Referring to fig. 1, 2 and 3, a third temperature sensor 313 and a fourth temperature sensor 314 electrically connected to the controller 4 are respectively disposed at the liquid inlet and the liquid outlet of the liquid-cooled outdoor unit 3. The third temperature sensor 313 and the fourth temperature sensor 314 are electrically connected to the first control unit 42, and are configured to send monitoring signals to the first control unit 42. In this embodiment, the fan 312 is a variable frequency fan 312, and the first control unit 42 controls the operation state of the fan 312. The delivery pump is a variable frequency water pump, and the operation state of the delivery pump is controlled by the first control unit 42. In this embodiment, the coolant temperature signal sensed by the third temperature sensor 313 or the fourth temperature sensor 314 is fed back to the first control unit 42, and when the coolant temperature flowing into or out of the liquid-cooled external unit 3 increases, the first control unit 42 controls the frequency of the transport pump and the fan 312 to increase, thereby improving the cooling effect. When the temperature of the coolant flowing into or out of the liquid-cooled external unit 3 decreases, the first control unit 42 controls the control fan 312 and the feed pump to decrease the frequency, thereby reducing the operation power consumption of the liquid-cooled external unit 3 to the maximum extent.

Specifically, in this embodiment, a plurality of temperature phases may be set inside the first control unit 42, and when the temperatures sensed by the third temperature sensor 313 and the fourth temperature sensor 314 are within one of the temperature phase ranges, the blower 312 and the delivery pump are controlled to operate at the power of the phase.

In some embodiments, the energy storage cabinet 2 may adopt a structure as shown in fig. 1, 3 and 4. Referring to fig. 1, 3 and 4 together, the energy storage cabinet 2 is multiple, and the cooling heat exchangers 21 in the multiple battery modules are all communicated with the liquid inlet pipe 22 and the liquid return pipe 23, and the liquid outlet of the cooling heat exchangers 21 is provided with an electric flow control valve 25 and a fifth temperature sensor 24, and the electric flow control valve 25 and the fifth temperature sensor 24 are all electrically connected with the controller 4. The automatic cooling system that this application provided can provide the secondary refrigerant to multiunit energy storage cabinet 2 simultaneously to can make the inside temperature of a plurality of energy storage cabinets 2 all reach the equilibrium. The fifth temperature sensor 24 is used to monitor the return temperature at the outlet of the cooling heat exchanger 21 and feed it back to the third control unit 44. The third control unit 44 controls the opening and closing size of the electric flow rate adjustment valve 25 according to the return temperature. When the reflux temperature is higher, the flow of the electric flow regulating valve 25 is increased, and when the reflux temperature is lower, the flow of the electric flow regulating valve 25 is controlled to be reduced, so that the effect of controlling the temperature in the energy storage cabinets 2 in a balanced manner is achieved.

In some embodiments, the energy storage cabinet 2 may adopt a structure as shown in fig. 1, 3 and 4. Referring to fig. 1, fig. 3 and fig. 4 together, the inside humiture sensor 26 that is used for the inside ambient temperature and humidity of energy storage cabinet 2 who measures respectively and the sixth temperature-sensing ware 27 that is used for measuring the inside electric core temperature of battery module that is provided with of energy storage cabinet 2, humiture sensor 26 and sixth temperature-sensing ware 27 all with controller 4 electric connection. The third control unit 44 is internally provided with an upper limit value and a lower limit value of the temperature and humidity sensor 26 and the sixth temperature sensor 27, when the temperatures detected by the temperature and humidity sensor 26 and the sixth temperature sensor 27 reach the upper limit value, the third control unit 44 controls the electric flow control valve 25 to be opened and sends a signal to the central control unit 41, and the central control unit 41 generates a signal to the first control unit 42 and the second control unit 43 and controls the water chilling unit 1 and the liquid cooling outdoor unit 3 to enter a working state.

In some embodiments, the water chiller 1 may be configured as shown in fig. 2. Referring to fig. 2, an energy storage tank for containing cooling fluid is disposed at the liquid inlet of the liquid inlet pipe 22, and a heating device 171 electrically connected to the controller 4 is disposed inside the energy storage tank. The energy storage water tank can store the secondary refrigerant into the energy storage water tank when the secondary refrigerant is conveyed into the energy storage cabinet 2, and can keep the secondary refrigerant warm after the second water pump 16 is closed for a period of time. Meanwhile, when the temperature and humidity sensor 26 and the second temperature sensor 231 sense that the temperature inside the energy storage cabinet 2 reaches the lower limit value, the third control unit 44 generates a signal to the second control unit 43, the second control unit 43 is electrically connected with the heating device 171, and controls the heating device 171 to be in a working state, so that the secondary refrigerant can be heated, and the temperature inside the energy storage cabinet 2 is ensured to be within a reasonable range.

Specifically, in this embodiment, the energy storage water tank is integrally a sealed structure, and an exhaust valve is disposed at the top of the energy storage water tank.

In some embodiments, the second water pump 16 may be configured as shown in fig. 2 and 4. Referring to fig. 2 and 4, a first pressure sensor 161 is connected to the liquid outlet of the second water pump 16, and the first pressure sensor 161 is electrically connected to the controller 4. The second water pump 16 is a variable frequency pump, when the first pressure sensor 161 detects that the pressure inside the liquid inlet pipe 22 is large, the signal can be sent to the second control unit 43, and the second control unit 43 controls the second water pump 16 to reduce the frequency, so that the effects of energy conservation and consumption reduction are achieved.

Specifically, in the present embodiment, when the flow controlled by the electric flow control valve 25 inside the energy storage cabinet 2 is small, the pressure inside the liquid inlet pipe 22 is increased to control the operating frequency or power of the second water pump 16 by the induction of the first pressure sensor 161.

Specifically, in the present embodiment, a second pressure sensor 151 is provided at the water outlet end of the first water pump 15. The first water pump 15 is an inverter pump, and the operating state of the first water pump 15 can be controlled by the third temperature sensor 313, the second temperature sensor 231, and the second pressure sensor 151.

In some embodiments, the liquid-cooled outdoor unit 3 may have a structure as shown in fig. 3. Referring to fig. 3, a heat exchanger 33 for cooling the gas in the first passage 311 is further disposed inside the first passage 311, a spray pipe 322 is disposed above the heat exchanger 33, and the spray pipe 322 is communicated with a water outlet of the spray device 32. Through the setting of heat exchanger 33, can play the effect of cooling to the gas in the first passageway 311, can effectively improve the cooling effect.

Optionally, in this embodiment, the heat exchanger 33 is a water-wind heat exchanger, and a liquid channel for conveying cooling water in the water-wind heat exchanger is arranged in a vertical direction. The cooling liquid sprayed by the spraying pipe 322 flows into the reservoir 17 again through the liquid channel of the water-air heat exchanger, and the air inlet channel of the water-air heat exchanger is communicated with the first channel 311.

In some embodiments, the liquid-cooled outdoor unit 3 may have a structure as shown in fig. 3. Referring to fig. 3, the heat exchanger 33 is provided with a second channel 315 for increasing the heat exchange rate of the heat exchanger 33, one end of the second channel 315 is communicated with the outside of the refrigeration chamber 31, and the other end is communicated with the air inlet of the fan 312. The second passage 315 is not in communication with the first passage 311, and coolant sprayed from the spray pipe 322 flows into the reservoir 17 of the spray device 32 through the second passage 315. So that the refrigerating medium can be recycled.

In some possible embodiments, the automatic cooling control method for the liquid-cooled energy storage device further includes starting the first mode when the external temperature is high, the battery module generates heat to cause the sixth temperature sensor 27 to sense a temperature increase, when the temperature fed back by the sixth temperature sensor 27 received by the third control unit 44 reaches a certain value, the third control unit 44 controls the electric flow control valve 25 to be fully opened and generates a signal to the central control unit 41, the central control unit 41 generates a signal to the second control unit 43, the second control unit 43 controls the first three-way valve 13 to communicate the liquid return pipe 23 with the liquid inlet of the evaporator 11, and controls the second three-way valve 14 to communicate the liquid outlet of the liquid-cooled external unit 3 with the liquid inlet of the condenser 12, and the liquid outlet of the condenser 12 closes the liquid inlet of the liquid-cooled external unit 3 through the first three-way valve 13, so as to communicate with the liquid inlet of the liquid-cooled external unit 3. The second control unit 43 preferentially controls the second water pump 16 to start, after the second water pump 16 starts, the temperature of the coolant gradually rises, and when the second temperature sensor 231 on the water return pipe senses that the return temperature of the coolant rises to a certain value, the second control unit 43 controls the first water pump 15 to open, and sends a signal to the central control unit 41, and the central control unit 41 controls the liquid-cooled outdoor unit 3 to work. Meanwhile, the third control unit 44 controls the opening and closing degree of the electric flow regulating valve 25 by comparing the sensed temperature of the fifth temperature sensor 24 with the sensed temperature of the second temperature sensor 231, so that the return water temperatures in the plurality of energy storage cabinets 2 are kept consistent. When the flow rate in the liquid return pipe 23 decreases, the pressure of the first pressure sensor 161 increases, so that the second control unit 43 controls the second water pump 16 to decrease the working frequency, thereby achieving the effect of saving energy. Meanwhile, the second control unit 43 monitors the sensing temperature of the first temperature sensor 221 and the second temperature sensor 231 at any time, so as to ensure that the battery module inside the energy storage cabinet 2 is kept in a stable operation state. Meanwhile, when the first control unit 42 receives that the temperature of the third stable sensor or the fourth stable sensor rises to a certain value, it controls the fan 312 and the spraying device 32 inside the liquid-cooled external unit 3 to be switched to the working state.

In some possible embodiments, a seventh temperature sensor is disposed outside the liquid-cooled external unit 3, when the first control unit 42 monitors that the seventh temperature sensor senses that the external stability is lower than a certain value, the seventh temperature sensor feeds back a signal to the central control unit 41, the first mode is closed, the second mode is entered, the first control unit 42 sends a signal to the central control unit 41, the temperature value of the coolant in the return pipe sensed by the second temperature sensor 231, which is acquired by the second control unit 43, is still higher than a preset value, the second control unit 43 controls the water chilling unit 1 to stop working, the first water pump 15 and the second water pump 16 stop working after a time delay, and after a time delay, the first three-way valve 13 is switched to communicate the liquid return pipe 23 with the liquid inlet of the liquid-cooled external unit 3, and the second three-way valve 14 is switched to communicate the liquid outlet of the liquid-cooled external unit 3 with the liquid inlet pipe 22. When the first three-way valve 13 and the second three-way valve 14 are switched in place, the second control unit 43 controls the second water pump 16 to enter a working state, at this time, the liquid-cooled external unit 3 directly conveys coolant to the inside of the energy storage cabinet 2, and the liquid-cooled external unit 3 controls the operation power of the conveying pump and the fan 312 in the spraying device 32 through the condition detected by the third temperature sensor 313 or the second temperature sensor 231.

In this embodiment, when the transfer pump and the blower 312 in the spraying device 32 reach the maximum operating power and the temperature value detected by the fourth temperature sensor 314 reaches the set maximum value, the first control unit 42 feeds back a signal to the central control unit 41, and the second mode is turned off and the first mode is re-entered.

In some possible embodiments, when the transfer pump and the fan 312 in the spraying device 32 reach the lowest operating power and reach the set lowest value according to the temperature value detected by the fourth temperature sensor 314, the spraying device enters a standby mode, in which the first control unit 42 controls the entire liquid-cooled external unit 3 to be in a shutdown state and feeds back a signal to the central control unit 41, the central control unit 41 generates a signal to the second control unit 43, the second control unit 43 controls the second water pump 16 to be turned off, and after a time delay, the second control unit 43 controls the second three-way valve 14 to switch the liquid outlet of the liquid-cooled external unit 3 to be communicated with the liquid inlet of the condenser 12. The first three-way valve 13 is switched to the liquid return pipe 23 to be communicated with the liquid inlet of the evaporator 11. When the three-way valve is switched in place, the second control unit 43 controls the second water pump 16 to enter the working state, and the coolant-isolating liquid external unit 3 directly enters the internal circulation.

In this embodiment, when the heating device 171 inside the energy storage water tank is in the off state, and the second water pump 16 is in the high-frequency state, when the temperature and humidity sensor 26 or the sixth temperature sensor 27 senses that the temperature inside the battery module or the energy storage cabinet 2 reaches a certain value, the central control unit 41 controls to switch out the standby mode. Switching to the second mode.

According to the automatic cooling system, the first mode, the second mode and the standby mode can be switched in time according to the change condition of the external temperature, and the energy consumption of the whole automatic cooling system can be effectively reduced.

Specifically, in the present application, the electrical connection relationship between the first control unit 42 and the spraying device 32 and the fan 312 is the prior art, and is not described herein.

The electrical connection relationship between the second control unit 43 and the first water pump 15, the second water pump 16, the first three-way valve 13, and the second three-way valve 14 is the prior art, and is not described herein.

The electrical connection between the third control unit 44 and the electric flow control valve 25 is conventional and will not be described herein.

Specifically, in this embodiment, a medium such as an aqueous ethylene glycol solution is used as the coolant.

Specifically, in this embodiment, air bag type constant pressure tanks are disposed at the liquid inlet of the first water pump 15 and the liquid inlet of the second water pump 16. And ensuring that the system operating pressure is in a proper range.

Specifically, in this embodiment, a filter is disposed at the liquid inlet of the first water pump 15 and the liquid inlet of the second water pump 16, and a check valve is disposed at the liquid outlet of the first water pump 15 and the liquid outlet of the second water pump 16.

Specifically, in this embodiment, the top of the liquid return pipe 23 in the energy storage cabinet 2 and the highest point of the whole circulation pipeline are both provided with an exhaust valve.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. An automatic cooling system of a liquid-cooled energy storage device, comprising:

the water chilling unit comprises an evaporator and a condenser;

the cooling heat exchanger used for cooling the battery module in the energy storage cabinet is arranged in the energy storage cabinet, a liquid inlet pipe is communicated with a liquid inlet of the cooling heat exchanger, a liquid outlet of the cooling heat exchanger is communicated with a liquid return pipe, and the liquid inlet pipe is communicated with a liquid outlet of the evaporator;

the liquid cooling outdoor unit is characterized in that a liquid outlet of the liquid return pipe is communicated with a first three-way valve, the other two interfaces of the first three-way valve are respectively communicated with a liquid inlet of the liquid cooling outdoor unit and a liquid inlet of the evaporator, a liquid outlet of the liquid cooling outdoor unit is communicated with a second three-way valve, the other two interfaces of the second three-way valve are respectively communicated with a liquid inlet of a condenser and the liquid inlet pipe, and a liquid outlet of the condenser is communicated with a liquid inlet of the liquid cooling outdoor unit;

the inlet department of condenser is provided with and is used for carrying the secondary refrigerant extremely the inside first water pump of condenser, be provided with on the feed liquor pipe be used for to the inside second water pump of carrying the secondary refrigerant of energy storage cabinet.

2. The automatic cooling system of claim 1, wherein the first three-way valve and the second three-way valve are both electrically operated three-way valves, the first three-way valve and the second three-way valve are both electrically connected to a controller for controlling the operating states of the first three-way valve and the second three-way valve, the liquid inlet pipe and the liquid return pipe are respectively provided with a first temperature sensor and a second temperature sensor electrically connected to the controller, and the controller is electrically connected to the first water pump and the second water pump for controlling the operating states of the first water pump and the second water pump.

3. The liquid-cooled energy storage device auto-cooling system of claim 2, wherein said liquid-cooled external unit comprises:

the refrigeration room, the indoor spray set who is used for cooling secondary refrigerant that is provided with of refrigeration, spray set with controller electric connection, still be provided with in the refrigeration room be used for with the first passageway of refrigeration room and external intercommunication, the air outlet department of first passageway be provided with controller electric connection's fan.

4. The automatic cooling system of claim 3, wherein a third temperature sensor and a fourth temperature sensor electrically connected to the controller are disposed at the inlet and the outlet of the liquid-cooled external unit, respectively.

5. The automatic cooling system of claim 2, wherein the energy storage cabinet is provided with a plurality of cooling heat exchangers in a plurality of battery modules, the cooling heat exchangers are all communicated with the liquid inlet pipe and the liquid return pipe, an electric flow control valve and a fifth temperature sensor are arranged at a liquid outlet of each cooling heat exchanger, and the electric flow control valve and the fifth temperature sensor are both electrically connected with the controller.

6. The automatic cooling system of claim 2, wherein a temperature and humidity sensor for measuring the internal environment of the energy storage cabinet and a sixth temperature sensor for measuring the core temperature of the battery module are disposed inside the energy storage cabinet, and both the temperature and humidity sensor and the sixth temperature sensor are electrically connected to the controller.

7. The automatic cooling system of claim 6, wherein an energy storage tank for containing cooling fluid is disposed at the inlet of the fluid inlet pipe, and a heating device electrically connected to the controller is disposed inside the energy storage tank.

8. The automatic cooling system of a liquid-cooled energy storage device of claim 6, wherein a first pressure sensor is connected to the outlet of the second water pump, and the first pressure sensor is electrically connected to the controller.

9. The automatic cooling system of a liquid-cooled energy storage device of claim 3, wherein a heat exchanger for cooling the gas in the first channel is further arranged in the first channel, and a spray pipe is arranged above the heat exchanger and communicated with a water outlet of the spray device.

10. The automatic cooling system of a liquid-cooled energy storage device of claim 9, wherein the heat exchanger is provided with a second channel for increasing the heat exchange rate of the heat exchanger, one end of the second channel is communicated with the outside of the refrigeration chamber, and the other end of the second channel is communicated with the air inlet of the fan.

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