CN-122025707-A - Thermal control method and device

CN122025707ACN 122025707 ACN122025707 ACN 122025707ACN-122025707-A

Abstract

The invention relates to a thermal control method and a thermal control device, and relates to the technical field of energy storage of a flow battery, wherein the thermal control method comprises the steps of obtaining working mode information of the flow battery and temperature information of a plurality of preset positions, wherein the preset positions at least comprise a galvanic pile liquid inlet pipeline, a galvanic pile liquid outlet pipeline, a prefabricated cabin, a storage tank, a magnetic pump and a converter; and controlling the cooling liquid distribution module to adjust the distribution path of the cooling liquid in the cooling liquid loop so as to adjust the flow battery to a thermal control working condition corresponding to the application scene, wherein the thermal control working condition comprises a heating working condition started when the temperature of the outer environment of the prefabricated cabin is lower than a first environmental temperature threshold, a refrigerating working condition started when the temperature of the outer environment of the prefabricated cabin is higher than or equal to a second environmental temperature threshold and a heat recovery working condition started when the working mode is switched.

Inventors

LIU HAOJI
MAO HENGSHAN
LIU XIAOJIE
HU WEIHAO
HAN WENJIE
WANG JIE
LI WEI
WANG TAO
LIU JUN

Assignees

中电建新能源集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. The heat control method is characterized by being applied to a heat control device of a flow battery, wherein the flow battery comprises a galvanic pile, a prefabricated cabin, a storage tank, a magnetic pump and a converter, the heat control device comprises a refrigerant loop, a cooling liquid loop and a cooling liquid split module, the refrigerant loop is used for providing cold or heat, the cooling liquid loop is used for obtaining the cold or heat through heat exchange with the refrigerant loop, and the cooling liquid split module is used for controlling a distribution path of the cold or heat in the cooling liquid loop; the method comprises the following steps: acquiring working mode information of a flow battery and temperature information of a plurality of preset positions, wherein the preset positions at least comprise a galvanic pile liquid inlet pipeline, a galvanic pile liquid outlet pipeline, a prefabricated cabin, a storage tank, a magnetic pump and a converter; determining an application scene of the flow battery according to the working mode information and the temperature information; The control cooling liquid diversion module adjusts a distribution path of cooling liquid in the cooling liquid loop so as to adjust the flow battery to a thermal control working condition corresponding to an application scene, wherein the thermal control working condition comprises a heating working condition started when the temperature of the outer environment of the prefabricated cabin is lower than a first environment temperature threshold value, a refrigerating working condition started when the temperature of the outer environment of the prefabricated cabin is higher than or equal to a second environment temperature threshold value and a heat recovery working condition started when the working mode is switched.
2. The method of claim 1, wherein the heating condition comprises a cold shut down condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: If the working mode information indicates a shutdown mode, the temperature of the electrolyte of the storage tank is lower than a first preset temperature, the temperature of the outside environment of the prefabricated cabin is lower than a first environment temperature threshold value, and the application scene of the flow battery is determined to be the application scene of enabling the cold shutdown working condition; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: Controlling the galvanic pile to convey the electrolyte into the storage tank; and controlling the cooling liquid distribution module to distribute the cooling liquid heated by the refrigerant loop to the heat exchanger corresponding to the storage tank.
3. The method of claim 1, wherein the heating operating condition comprises a cold standby operating condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: if the working mode information indicates a standby mode, the temperature of the electrolyte of the storage tank is higher than or equal to a first preset temperature, the temperature of the electrolyte of the storage tank is lower than a second preset temperature, the temperature of the outside environment of the prefabricated cabin is lower than a first environment temperature threshold value, and an application scene of the flow battery is determined to be an application scene in which a cold standby working condition is to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: And controlling the cooling liquid distribution module to simultaneously distribute the cooling liquid heated by the refrigerant loop to the heat exchanger corresponding to the electric pile liquid inlet pipeline and the heat exchanger corresponding to the storage tank.
4. The method of claim 1, wherein the heating operating condition comprises a cold start operating condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: if the working mode information indicates a charging mode or a discharging mode and the external environment temperature of the prefabricated cabin is lower than a first environment temperature threshold value, determining that the application scene of the flow battery is an application scene in which a cold starting working condition is required to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: if the temperature of the electrolyte at the outlet of the electric pile is lower than a third preset temperature and the temperature of the electrolyte at the inlet of the electric pile is lower than a fourth preset temperature, controlling a cooling liquid splitting module to guide the waste heat generated by the magnetic pump and the converter to a heat exchanger corresponding to a liquid inlet pipeline of the electric pile through cooling liquid; If the temperature of the electrolyte at the outlet of the electric pile is lower than the third preset temperature and the temperature of the electrolyte at the inlet of the electric pile is higher than or equal to the fourth preset temperature, controlling a cooling liquid distribution module to distribute the cooling liquid cooled by the refrigerant loop to a heat exchanger corresponding to the magnetic pump and a heat exchanger corresponding to the converter; If the temperature of the electrolyte at the outlet of the electric pile is higher than or equal to a third preset temperature and the temperature of the environment in the prefabricated cabin is lower than a fifth preset temperature, controlling a cooling liquid splitting module to guide the waste heat generated by the magnetic pump and the converter to a heat exchanger corresponding to the prefabricated cabin through the cooling liquid; If the temperature of the electrolyte at the outlet of the electric pile is higher than or equal to a third preset temperature and the temperature of the environment in the prefabricated cabin is higher than or equal to a fifth preset temperature, the cooling liquid distribution module is controlled to distribute the cooling liquid cooled by the refrigerant loop to a heat exchanger corresponding to a liquid inlet pipeline of the electric pile, a heat exchanger corresponding to a magnetic pump and a heat exchanger corresponding to a converter.
5. The method of claim 1, wherein the heating operating condition comprises a rapid heating operating condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: If the working mode information indicates a charging mode or a discharging mode, the outside environment temperature of the prefabricated cabin is lower than a first environment temperature threshold value, the temperature of the electrolyte at the inlet of the electric pile is lower than a second preset temperature, and the application scene of the flow battery is determined to be the application scene in which the rapid heating working condition is required to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: And controlling the cooling liquid flow dividing module, collecting the heat in the magnetic pump, the converter and the storage prefabricated cabin, and distributing the heat to the heat exchanger corresponding to the electric pile liquid inlet pipeline through cooling liquid.
6. The method of claim 1, wherein the refrigeration condition comprises a hot shut-down condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: if the working mode information indicates a shutdown mode and the prefabricated cabin outer environment temperature is higher than or equal to a second environment temperature threshold value, determining that the application scene of the flow battery is an application scene in which a thermal shutdown working condition is required to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: And if the temperature of the electrolyte of the storage tank is higher than or equal to a second preset temperature, controlling the cooling liquid diversion module to distribute the cooling liquid cooled by the refrigerant loop to the heat exchanger corresponding to the storage tank.
7. The method of claim 1, wherein the cooling condition comprises a hot standby condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: if the working mode information indicates a standby mode and the prefabricated cabin outer environment temperature is higher than or equal to a second environment temperature threshold value, determining that the application scene of the flow battery is an application scene in which a hot start working condition is required to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: And if the temperature of the electrolyte of the storage tank is higher than the fourth preset temperature, controlling the cooling liquid diversion module to distribute the cooling liquid cooled by the refrigerant loop to the heat exchanger corresponding to the storage tank.
8. The method of claim 1, wherein the cooling condition comprises a warm start condition; The determining the application scene of the flow battery according to the working mode information and the temperature information comprises the following steps: If the working mode information indicates a charging mode or a discharging mode and the external environment temperature of the prefabricated cabin is higher than or equal to a second environment temperature threshold value, determining that the application scene of the flow battery is a hot start working condition to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: If the temperature of the electrolyte at the outlet of the electric pile is higher than or equal to a third preset temperature, controlling a cooling liquid diversion module to distribute the cooling liquid cooled by the refrigerant loop to a heat exchanger corresponding to the magnetic pump, a heat exchanger corresponding to the converter and a heat exchanger corresponding to the electric pile liquid inlet pipeline; And if the temperature of the electrolyte at the outlet of the electric pile is lower than a third preset temperature, controlling the cooling liquid diversion module to distribute the cooling liquid cooled by the refrigerant loop to the heat exchanger corresponding to the magnetic pump and the heat exchanger corresponding to the converter.
9. The method of claim 1, wherein determining an application scenario of the flow battery according to the operation mode information and the temperature information comprises: If the working mode information indicates that the charging mode or the discharging mode is switched to the shutdown mode, the temperature of the outer environment of the prefabricated cabin is higher than or equal to a first environmental temperature threshold value, and the temperature of the outer environment of the prefabricated cabin is lower than a fourth environmental temperature threshold value, determining that the application scene of the flow battery is the application scene in which the heat recovery working condition is to be started; The control coolant diversion module adjusts a distribution path of coolant in a coolant loop, comprising: If the temperature of the electrolyte of the storage tank is lower than a fourth preset temperature, controlling a cooling liquid diversion module, and distributing the residual heat of the electric pile, the magnetic pump and the converter to the heat exchanger corresponding to the storage tank through the cooling liquid; If the temperature of the electrolyte of the storage tank is higher than or equal to a fourth preset temperature and the temperature of the environment in the prefabricated cabin is lower than the fourth preset temperature, controlling a cooling liquid distribution module to distribute the waste heat of the electric pile, the magnetic pump and the converter to the heat exchanger corresponding to the prefabricated cabin through the cooling liquid; if the temperature of the electrolyte of the storage tank is higher than or equal to the fourth preset temperature and the temperature of the environment in the prefabricated cabin is higher than or equal to the fourth preset temperature, the cooling liquid distribution module is controlled to distribute the cooling liquid cooled by the refrigerant loop to the heat exchanger corresponding to the liquid inlet pipeline of the electric pile, the heat exchanger corresponding to the magnetic pump and the heat exchanger corresponding to the converter.
10. A thermal control device, characterized in that the thermal control device is applied to a flow battery, the flow battery comprises a pile, a prefabricated cabin, a storage tank, a magnetic pump and a converter, the thermal control device comprises a refrigerant loop, a cooling liquid split module and a controller, the refrigerant loop is used for providing cold or heat, the cooling liquid loop is used for obtaining the cold or heat through heat exchange with the cooling liquid loop, the cooling liquid split module is used for controlling a distribution path of the cold or heat in the cooling liquid loop, and the controller is used for executing the method according to any one of claims 1-9.

Description

Thermal control method and device Technical Field The embodiment of the specification relates to the technical field of energy storage of flow batteries, in particular to a thermal control method and a thermal control device. Background In recent years, the energy storage of the flow battery has become an important choice for large-scale long-term energy storage, and the characteristics of high intrinsic safety and long cycle life are particularly suitable for the scenes of energy storage power stations and the like. However, compared with the currently mainstream lithium battery energy storage, the flow battery still has the problem of lower cycle efficiency. Taking an all-vanadium redox flow battery with higher energy efficiency as an example, the electrochemical conversion efficiency is about 80%, if the energy loss of auxiliary equipment such as a circulating pump, an air conditioner, electric heating, electric power conversion and the like is counted, the comprehensive efficiency of the system is only about 68% -70%, and is obviously lower than the comprehensive efficiency of the lithium battery for storing energy by more than 85%. In the energy loss, the energy consumption of auxiliary equipment such as a pump, an air conditioner, electric heating and the like is about 6%, and optimizing the partial loss has important significance for improving the overall operation efficiency of the system. In addition, the energy storage medium, the electrolyte, of flow batteries is extremely sensitive to temperature. Taking an all-vanadium redox flow battery as an example, the optimal working temperature range of the electrolyte is 35-40 ℃. Irreversible precipitation is easy to cause at a temperature higher than 40 ℃ to lead to capacity attenuation, electrochemical conversion efficiency is reduced at a temperature lower than 35 ℃, and electrolyte can be crystallized if the temperature is lower than 0 ℃, so that normal operation of a system is directly affected. Therefore, the efficient thermal management technology is important to improving the efficiency of the flow battery system, guaranteeing the operation performance and prolonging the service life. At present, the common flow battery thermal management mode is still rough, and low-temperature electricity is adopted to assist the simple means such as heat, high-temperature air conditioner refrigeration, and the energy efficiency is lower, and systematic temperature regulation and control and energy optimization are difficult to realize. Disclosure of Invention The embodiment of the specification aims to provide a thermal control method and a thermal control device, so as to solve the problems that the energy efficiency is low and systematic temperature regulation and energy optimization are difficult to realize in the existing method. In order to solve the above technical problems, the specific technical solutions of the embodiments of the present specification are as follows: In one aspect, an embodiment of the present disclosure provides a thermal control method applied to a flow battery, where the flow battery includes a galvanic pile, a prefabricated cabin, a refrigerant circuit, a coolant circuit, and a coolant split module, and the coolant circuit includes a storage tank, a magnetic pump, and a converter; the method comprises the following steps: acquiring working mode information of a flow battery and temperature information of a plurality of preset positions, wherein the preset positions at least comprise a galvanic pile liquid inlet pipeline, a galvanic pile liquid outlet pipeline, a prefabricated cabin, a storage tank, a magnetic pump and a converter; Determining a target heat control working condition of the flow battery according to the working mode information and the temperature information, wherein the heat control working condition comprises a heating working condition started when the temperature of the outside environment of the prefabricated cabin is lower than a first environmental temperature threshold, a refrigerating working condition started when the temperature of the outside environment of the prefabricated cabin is higher than or equal to a second environmental temperature threshold and a heat recovery working condition started when the working mode is switched; The control coolant split module adjusts a distribution path of coolant in the coolant loop to distribute heat or cold acquired from the coolant loop to components corresponding to the target thermal control condition. On the other hand, the embodiment of the specification provides a heat control device which is applied to a flow battery, the flow battery comprises a galvanic pile, a prefabricated cabin, a storage tank, a magnetic pump and a converter, the heat control device comprises a refrigerant loop, a cooling liquid split module and a controller, the refrigerant loop is used for providing cold or heat, the cooling liquid loop is used for acquiring the cold or heat throug