CN218351541U - Liquid cooling temperature control system for electrochemical energy storage battery - Google Patents

Abstract

The utility model discloses an electrochemistry energy storage battery liquid cooling temperature control system, including refrigerant return circuit and secondary heat transfer liquid cooling return circuit, the refrigerant return circuit is including the compressor, condenser, condensation fan, electronic expansion valve and the plate heat exchanger that connect gradually, secondary heat transfer liquid cooling return circuit passes through plate heat exchanger and refrigerant return circuit heat exchange, the refrigerant return circuit still includes first electromagnetic three-way valve, fluorine pump, second electromagnetic three-way valve, first electromagnetic three-way valve is located the front side of compressor to connect in compressor one side and form first branch road, the fluorine pump is located the rear side of condenser, second electromagnetic three-way valve is located the front side of fluorine pump to connect in fluorine pump one side and form the second branch road, electronic expansion valve one side forms the third branch road, the utility model discloses set up changeable air-cooled return circuit in the refrigerant return circuit, need not to start the compressor and can satisfy the control by temperature when external environment temperature is not high, promoted the efficiency of complete machine system.

Description

Liquid cooling temperature control system for electrochemical energy storage battery

Technical Field

The utility model relates to an electrochemistry energy storage battery control by temperature change technical field, concretely relates to electrochemistry energy storage battery liquid cooling temperature control system.

Background

At present, the battery temperature control scheme used in the electrochemical energy storage industry at home and abroad is a liquid cooling scheme which comprises the following systems: compressor, condenser, liquid storage pot, expansion valve, refrigerant pipeline, board trade, water pump, battery cold water board and secondary refrigerant pipeline etc. its theory of operation: when the unit is in operation, heat absorbed by an evaporator (plate heat exchanger) from a secondary refrigerant circulating system is absorbed by evaporation of a refrigerant, the refrigerant is compressed by a compressor and then enters a condenser, the heat is released into the ambient air environment by condensation of the refrigerant, the condensed refrigerant returns to the evaporator through an expansion valve and then is evaporated, the circulation is repeated, the heat absorbed by a battery cold plate by the secondary refrigerant is released by the evaporator, the heat is re-entered into the cold plate by using power generated by operation of a water pump to absorb heat generated in the charging and discharging processes of the battery, however, the compressor needs to be started for refrigeration to provide a cold source under various working conditions, the problem of frequent starting and stopping is caused when the temperature of the external environment is low, and the unit has the pain points of low energy efficiency, high energy consumption and the like of the whole system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrochemistry energy storage battery liquid cooling temperature control system to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an electrochemistry energy storage battery liquid cooling temperature control system, includes refrigerant return circuit and secondary heat transfer liquid cooling return circuit, the refrigerant return circuit is including the compressor, condenser, condensation fan, electronic expansion valve and the plate heat exchanger that connect gradually, secondary heat transfer liquid cooling return circuit is including the heating pipe, cold water board and the water pump that connect gradually, the cold water board is used for adjusting energy storage battery's temperature, secondary heat transfer liquid cooling return circuit passes through plate heat exchanger and refrigerant return circuit heat exchange, the refrigerant return circuit still includes first electromagnetic three-way valve, fluorine pump, second electromagnetic three-way valve, first electromagnetic three-way valve is located the front side of compressor to connect in compressor one side and form first branch, first branch is equipped with first check valve, the fluorine pump is located the rear side of condenser, second electromagnetic three-way valve is located the front side of fluorine pump to connect in fluorine pump one side and form the second branch, the second branch is equipped with the second check valve, electronic expansion valve one side forms the third branch, the third branch is equipped with the solenoid valve.

Further, the front side and the rear side of the compressor are respectively provided with an air separator and an oil separator.

Further, a liquid storage tank is arranged between the condenser and the fluorine pump.

Furthermore, a drying filter is arranged on the rear side of the fluorine pump.

Furthermore, the number of the cold water plates is more than 2, and the cold water plates are arranged in parallel.

Furthermore, the secondary heat exchange liquid cooling loop is also provided with a liquid supplementing system, and the liquid supplementing system is positioned at the rear side of the water pump and comprises a liquid supplementing water tank, a liquid supplementing water pump and a water valve which are sequentially connected.

The utility model discloses set up changeable forced air cooling return circuit in the refrigerant return circuit, the forced air cooling return circuit of opening of the judgement selectivity of the external ambient temperature of the control unit accessible need not to start the compressor when external ambient temperature is not high promptly and can satisfy the control by temperature change requirement, has promoted complete machine system's efficiency, reaches energy saving and emission reduction's purpose.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the liquid cooling temperature control system for the electrochemical energy storage battery comprises a refrigerant loop 1 and a secondary heat exchange liquid cooling loop 2, wherein the refrigerant loop 1 comprises a compressor 11, a condenser 12, a condensing fan 13, an electronic expansion valve 14 and a plate heat exchanger 15 which are sequentially connected, a refrigerant in the refrigerant loop 1 is compressed by the compressor 11 and then enters the condenser 12 for condensation, heat is released to the ambient air environment through the condensing fan 13, the condensed refrigerant enters the plate heat exchanger 15 through the throttling of the electronic expansion valve 14, and the heat absorption and evaporation in the plate heat exchanger 15 achieve the refrigeration effect; the secondary heat exchange liquid cooling loop 2 is used for adjusting the temperature of the energy storage battery 3 and realizing secondary cooling through internal secondary refrigerant, the secondary refrigerant in the embodiment comprises ethanol and water, the secondary heat exchange liquid cooling loop 2 exchanges heat with the refrigerant loop 1 through the plate heat exchanger 15, the secondary heat exchange liquid cooling loop 2 comprises a heating pipe 21, a cold water plate 22 and a water pump 23 which are sequentially connected, the cold water plate 22 directly contacts with the energy storage battery 3 for heat exchange, and the secondary refrigerant takes away heat so as to cool the energy storage battery 3, the method is suitable for the environment with higher external temperature so as to provide enough cold energy to dissipate heat of the energy storage battery 3, and furthermore, in the embodiment, more than 2 cold water plates 22 are arranged, and are arranged in parallel, flow regulating valves 24 are respectively and independently arranged at the front sides of the cold water plates 22 for regulating the flow of the secondary refrigerant, to meet the heat dissipation requirements of batteries of different types, the water pump 23 is used for providing power for the secondary heat exchange liquid cooling loop 2 to circulate the secondary heat exchange liquid, preferably, a water valve 25 is arranged at the front side of the water pump 23, to cut off the water supply during the maintenance, and further, a Y-shaped filter 26 is provided at the rear side of the cold water plate 22, the secondary heat exchange liquid cooling loop 2 is also provided with a liquid supplementing system 8, the liquid supplementing system 8 is positioned at the rear side of the water pump 23 and comprises a liquid supplementing water tank 81, a liquid supplementing water pump 82 and a liquid supplementing valve 83 which are sequentially connected, the liquid supplementing valve 83 is used for controlling liquid supplementing, the liquid supplementing water pump 82 is used for pumping the secondary refrigerant out of the liquid supplementing water tank 81, when the external environment temperature is lower, the energy storage battery needs to be started after being preheated by the heating pipe 21 so as to avoid difficult starting at low temperature and damage to the energy storage battery caused by too low ambient temperature.

Further, when the temperature of the external environment is neither high nor low, the refrigerant circuit 1 further includes a first electromagnetic three-way valve 16, a fluorine pump 17, and a second electromagnetic three-way valve 18, the first electromagnetic three-way valve 16 is located at the front side of the compressor 11, and is connected to form a first branch at one side of the compressor, the first branch is provided with a first one-way valve 161, the fluorine pump 17 is located at the rear side of the condenser 12, and is used for providing power for refrigerant circulation, the second electromagnetic three-way valve 18 is located at the front side of the fluorine pump 17, and is connected to form a second branch at one side of the fluorine pump, the second branch is provided with a second one-way valve 181, the electronic expansion valve 14 is formed at one side thereof, the third branch is provided with a solenoid valve 19, when the compressor is not required to refrigerate, the compressor 11 and the electronic expansion valve 14 are closed, the first electromagnetic three-way valve 16 is connected to the second one-way valve 161, the second electromagnetic three-way valve 18 is connected to the fluorine pump 17, the electronic expansion valve 19 is opened, in this mode, the refrigerant enters the condenser 12 and then flows into the condenser 13, the condenser 15, and the liquid refrigerant is filtered, so that the refrigerant flows into the compressor 11 and the liquid refrigerant is filtered, and then flows into the compressor 4, and then the liquid refrigerant is filtered, the liquid refrigerant 4, and the liquid refrigerant is further compressed into the heat exchanger 11, so that the compressor 4 is filtered, and the compressor 4, and the refrigerant is further, the refrigerant is filtered, and is filtered, preferably, the oil component 5 returns the filtered oil to the compressor 11 through the oil return pipe 51 to ensure the normal operation thereof, further, since the amount of the refrigerant in the refrigerant circuit 1 can change due to the working condition of the plate heat exchanger, a liquid storage tank 6 is arranged between the condenser 12 and the fluorine pump 17 for storing excessive refrigerant, and further, in order to ensure the refrigeration effect, a drying filter 7 is arranged at the rear side of the fluorine pump 17 for filtering impurities in the pipeline.

The working principle is as follows: the liquid temperature control system of the electrochemical energy storage battery provided by the utility model carries out temperature control adjustment through an external control unit (not shown in the figure), namely, the control unit sets the threshold value of the environment temperature, starts different temperature control modes when different threshold value settings are reached, the control unit is at least but not limited to be electrically connected with a first electromagnetic three-way valve 16, a compressor 11, a condensing fan 13, a second electromagnetic three-way valve 18, a fluorine pump 17, an electronic expansion valve 14, an electromagnetic valve 19, a heating pipe 21 and a water pump 23, when sensing that the ambient temperature is higher, the control unit controls the compressor 11, the condensing fan 13, the electronic expansion valve 14 and the water pump 23 to be opened, the electromagnetic valve 19 to be closed, the first electromagnetic three-way valve 16 to be communicated with the compressor 11, the second electromagnetic three-way valve 18 to be communicated with the second one-way valve 181, the secondary heat exchange liquid cooling loop 2 carries out heat exchange through the plate heat exchanger 15 to provide enough cold for the secondary refrigerant to cool the energy storage battery, when sensing that the ambient temperature is not high or low, the control unit controls the condensing fan 13, the fluorine pump 17, the electromagnetic valve 19 and the water pump 23 to be started, the compressor 11 and the electronic expansion valve 14 are closed, the first electromagnetic three-way valve 16 is communicated with the first one-way valve 161, the second electromagnetic three-way valve 18 is communicated with the fluorine pump 17, at the moment, the refrigerant loop 1 only provides cold energy through the condensing fan 13, the secondary heat exchange liquid cooling loop 2 exchanges heat through the plate heat exchanger 15, when sensing that the ambient temperature is low, the control unit only controls the heating pipe 21 and the water pump 23 to be started, carry out temperature compensation to the secondary refrigerant through heating pipe 21 in order to guarantee energy storage battery's normal start work, the utility model discloses a set up changeable forced air cooling return circuit in refrigerant return circuit 1, promoted complete machine system's efficiency, reach energy saving and emission reduction's purpose.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an electrochemistry energy storage battery liquid cooling temperature control system, includes refrigerant return circuit (1) and secondary heat transfer liquid cooling return circuit (2), the refrigerant return circuit is including compressor (11), condenser (12), condensing fan (13), electronic expansion valve (14) and plate heat exchanger (15) that connect gradually, secondary heat transfer liquid cooling return circuit is including heating pipe (21), cold water plate (22) and water pump (23) that connect gradually, the cold water plate is used for adjusting the temperature of energy storage battery (3), secondary heat transfer liquid cooling return circuit passes through plate heat exchanger and refrigerant return circuit heat exchange, its characterized in that: the refrigerant circuit further comprises a first electromagnetic three-way valve (16), a fluorine pump (17) and a second electromagnetic three-way valve (18), wherein the first electromagnetic three-way valve is located on the front side of the compressor and connected on one side of the compressor to form a first branch, the first branch is provided with a first one-way valve (161), the fluorine pump is located on the rear side of the condenser, the second electromagnetic three-way valve is located on the front side of the fluorine pump and connected on one side of the fluorine pump to form a second branch, the second branch is provided with a second one-way valve (181), a third branch is formed on one side of the electronic expansion valve, and the third branch is provided with an electromagnetic valve (19).

2. The electrochemical energy storage cell liquid cooling temperature control system of claim 1, wherein: the front side and the rear side of the compressor are respectively provided with an air separator (4) and an oil separator (5).

3. The electrochemical energy storage cell liquid cooling temperature control system of claim 1, wherein: a liquid storage tank (6) is arranged between the condenser and the fluorine pump.

4. The electrochemical energy storage cell liquid cooling temperature control system of claim 1, wherein: and a drying filter (7) is arranged on the rear side of the fluorine pump.

5. The electrochemical energy storage cell liquid cooling temperature control system of claim 1, wherein: the number of the cold water plates is more than 2, and the cold water plates are arranged in parallel.

6. The electrochemical energy storage cell liquid cooling temperature control system of claim 1, wherein: the secondary heat exchange liquid cooling loop is further provided with a liquid supplementing system (8), the liquid supplementing system is located on the rear side of the water pump and comprises a liquid supplementing water tank (81), a liquid supplementing water pump (82) and a liquid supplementing valve (83) which are connected in sequence.

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