CN-121993973-A - Temperature control system and method of double-path liquid cooling machine for energy storage

Abstract

The invention relates to the technical field of liquid cooler temperature control, in particular to a temperature control system and a temperature control method of a double-path liquid cooler for energy storage, wherein the temperature control system comprises a refrigeration module, the refrigeration module comprises a compressor, a condenser and a PACK plate exchanger, and the PACK plate exchanger is used for carrying out heat exchange with a waterway on the PACK side so as to realize forced refrigeration of the waterway on the PACK side; the method is characterized in that when the environment temperature is low, the temperature control requirement can be met by only natural air cooling and heat dissipation, the energy consumption is low, meanwhile, the frequent start-stop problem of a refrigerating module is avoided, under the condition of realizing energy conservation, the temperature control precision is higher, the requirement on the control difficulty is further reduced, mass production and quality control are facilitated, the temperature difference between a high-temperature area and a low-temperature area is fully utilized through forced association and control of the high-temperature and low-temperature, and the heat exchange is performed through PCS plate change by only using one three-way water valve control flow.

Inventors

• WEI WENZHI

Assignees

• 江苏新淼温控系统有限公司

Dates

Publication Date

20260508

Application Date

20260210

Claims (5)

1. 1. The utility model provides a temperature control system of double-circuit liquid cooler for energy storage which characterized in that includes: The refrigerating module comprises a compressor, a condenser and a PACK plate exchanger, wherein the PACK plate exchanger is used for carrying out heat exchange with the waterway of the PACK side, so that forced refrigeration of the waterway of the PACK side is realized; The natural cooling module comprises a water pump, a natural cooling heat exchanger and a PCS plate exchanger, wherein the water pump is used for pumping cooling liquid to the natural cooling heat exchanger, the natural cooling heat exchanger is used for radiating heat outwards, and the PCS plate exchanger is used for carrying out heat exchange with a water channel on the PCS side; The three-way water valve is connected between the PACK plate exchanger and the PCS plate exchanger and used for controlling cooling flow flowing through the PCS plate exchanger to realize heat exchange of cooling liquid of the forced refrigeration module and the natural cooling module; The PTC heater is arranged in the water channel at the PACK side and is used for heating the water channel at the PACK side or the water channels at the PACK side and the PCS side; The fan is shared by a condenser of the refrigeration module and the natural cooling heat exchanger and is used for providing heat dissipation power for the condenser or the natural cooling heat exchanger; the control module is electrically connected with the compressor, the water pump, the three-way water valve, the PTC heater, the fan and the temperature sensor respectively, and the temperature sensor is used for collecting the waterway temperature of the PACK side and the waterway temperature of the PCS side.
2. 2. The temperature control system of the two-way liquid cooling machine for energy storage according to claim 1, wherein the temperature sensor comprises a first sensor group arranged on a PACK side and a second sensor group arranged on a PCS side, and the control module controls the working states of all components according to collected data of the first sensor group and the second sensor group.
3. 3. A temperature control method applied to a temperature control system of a two-way liquid cooling machine for energy storage according to any one of claims 1 to 2, characterized by comprising the following modes: A natural cooling mode, namely when the PCS side temperature is higher than a preset PCS cooling threshold value and the PACK side temperature is lower than a preset PACK cooling threshold value; If the heat radiation capability of the natural cooling module meets the cooling requirement of the PCS side, the control module controls the three-way water valve to be closed, the fan is started by the temperature control of the PCS side, the refrigerating module does not work, and the PCS side is cooled through the natural cooling module; If the heat radiation capability of the natural cooling module cannot meet the PCS side cooling requirement, the control module controls the three-way water valve to be opened, the cooling liquid at the PACK side participates in PCS end cooling, and when the temperature at the PACK side rises to a preset PACK cooling threshold value, the control module starts a compressor of the refrigerating module, and a fan is switched to be controlled by the refrigerating module, and the temperature at the PCS side is controlled through the opening adjustment of the three-way water valve; A forced cooling mode, wherein the temperature of the PACK side is higher than a preset PACK cooling threshold value, and the temperature of the PCS side is lower than a preset PCS cooling threshold value; The control module controls the three-way water valve to be fully opened, cold water of the natural cooling module is exchanged and cooled by the PACK plate and then flows through the PCS plate to be exchanged and cooled by the PCS side, and the fan is controlled by the temperature of the PCS side; When the temperature of the PACK side is continuously increased to a threshold value to be subjected to forced refrigeration, the control module starts a compressor of the refrigeration module, the fan is switched to be controlled by the refrigeration module, and the temperature of the PCS side is regulated and controlled through the opening of the three-way water valve; Heating mode, heating control; when only the PACK side needs to be heated, the control module starts the PTC heater, controls the three-way water valve to be fully closed, and the fan does not work; When the PACK side and the PCS side are heated, the control module starts the PTC heater to control the three-way water valve to be fully opened, and the fan does not work.
4. 4. The method according to claim 3, wherein the control module automatically determines and switches the operation mode by monitoring the water inlet and outlet temperature of the PACK, the water inlet and outlet temperature of the PCS, and the ambient temperature.
5. 5. The method of claim 4, wherein the temperature of the PCS side rises before the PACK side, and when the temperature of the PCS side reaches a preset starting threshold, the control module starts the fan to radiate heat of the natural cooling heat exchanger, the compressor of the refrigeration module is temporarily disabled, and the PCS side is cooled by adopting a natural cooling mode.

Description

Temperature control system and method of double-path liquid cooling machine for energy storage Technical Field The invention relates to the technical field of temperature control of liquid coolers, in particular to a temperature control system and a temperature control method of a double-path liquid cooler for energy storage. Background In the field of electrochemical energy storage temperature control, the electrochemical energy storage temperature control system can play an important role due to the severe requirement of a lithium battery on the operation temperature. Meanwhile, the PCS also has the temperature control requirement, and because the PCS temperature control requirement is different from the battery temperature control requirement, the PCS can generally work at 35-45 ℃, and the battery is generally at 15-35 ℃ and optimally at 25 ℃, different temperature control requirements are caused, if the PCS is easy to condense due to low water supply temperature, and if the PCS is high water outlet temperature, the battery temperature control cannot be ensured. The traditional liquid cooling unit adopts forced refrigeration and is controlled respectively through double waterways, and the traditional liquid cooling unit can complete basic temperature control requirements, but has no advantages in the aspects of energy conservation and condensation prevention. The main temperature control content of the prior art is that a plate in a refrigeration module is changed to provide cold for a waterway on the PACK side, a water-water plate change is added in a backwater test, and the cold is provided for the waterway of the PCS to cool. The temperature control scheme has the main defects that even if the ambient temperature is not high, the refrigeration module needs to be started for cooling, the energy consumption is high, when the PACK does not generate heat and the PCS side needs to be cooled, the refrigeration module also needs to be started, the temperature of the PACK side is possibly too low, and the temperature control difficulty is high. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a temperature control system and a temperature control method of a double-path liquid cooling machine for energy storage. In order to achieve the above purpose, the present invention adopts the following technical scheme: The temperature control system comprises a refrigeration module, wherein the refrigeration module comprises a compressor, a condenser and a PACK plate exchanger, and the PACK plate exchanger is used for carrying out heat exchange with a waterway of a PACK side so as to realize forced refrigeration of the waterway of the PACK side; The natural cooling module comprises a water pump, a natural cooling heat exchanger and a PCS plate exchanger, wherein the water pump is used for pumping cooling liquid to the natural cooling heat exchanger, the natural cooling heat exchanger is used for radiating heat outwards, and the PCS plate exchanger is used for carrying out heat exchange with a water channel on the PCS side; The three-way water valve is connected between the PACK plate exchanger and the PCS plate exchanger and used for controlling cooling flow flowing through the PCS plate exchanger to realize heat exchange of cooling liquid of the forced refrigeration module and the natural cooling module; The PTC heater is arranged in the water channel at the PACK side and is used for heating the water channel at the PACK side or the water channels at the PACK side and the PCS side; The fan is shared by a condenser of the refrigeration module and the natural cooling heat exchanger and is used for providing heat dissipation power for the condenser or the natural cooling heat exchanger; the control module is electrically connected with the compressor, the water pump, the three-way water valve, the PTC heater, the fan and the temperature sensor respectively, and the temperature sensor is used for collecting the waterway temperature of the PACK side and the waterway temperature of the PCS side. Preferably, the temperature sensor comprises a first sensor group arranged on the PACK side and a second sensor group arranged on the PCS side, and the control module controls the working states of all the components according to the acquired data of the first sensor group and the second sensor group. A temperature control method of a temperature control system of a double-path liquid cooling machine for energy storage comprises the following modes: A natural cooling mode, namely when the PCS side temperature is higher than a preset PCS cooling threshold value and the PACK side temperature is lower than a preset PACK cooling threshold value; If the heat radiation capability of the natural cooling module meets the cooling requirement of the PCS side, the control module controls the three-way water valve to be closed, the fan is started by the temperature control of the PCS side, the refr