Flow battery temperature control method and system and flow battery

Abstract

According to the flow battery temperature control method and system and the flow battery, the electrolyte temperature, the pump operation power, the charging and discharging power, the heater temperature and the environment temperature of the flow battery can be obtained in real time in the operation process, and then analysis and calculation are conducted by combining the electrolyte temperature, the pump operation power, the charging and discharging power and the environment temperature; a given temperature of a heater of the flow battery is determined. Finally, the operating power of the heater is adjusted in combination with the heater temperature and the given temperature to change the temperature of the electrolyte. According to the scheme, the pump operation power, the charging and discharging power and the environment temperature in the operation process of the flow battery are comprehensively considered, the temperature adjustment of the electrolyte is realized by changing the operation power of the heater, and the temperature control precision is relatively high.

Description

Technical Field

[0001] The present application relates to the technical field of flow batteries, and particularly to a method and system for controlling the temperature of a flow battery and a flow battery. Background Art

[0002] A flow battery is a new type of energy storage battery in which the positive electrolyte and the negative electrolyte are circulated separately. With the rapid development of renewable energy, flow batteries have become important candidates in the energy storage field due to their high capacity, wide application fields, high efficiency, safety, etc. The temperature control of the electrolyte of a flow battery is crucial for the performance and life of the battery.

[0003] However, in related technologies, it is difficult to maintain the electrolyte temperature within the optimal temperature operating range, and there is a disadvantage of poor control accuracy. Summary of the Invention

[0004] Based on this, it is necessary to provide a method and system for controlling the temperature of a flow battery and a flow battery to solve the problem of poor control accuracy of the electrolyte temperature of the flow battery.

[0005] A method for controlling the temperature of a flow battery includes: obtaining in real time the electrolyte temperature, pump operating power, charge-discharge power, heater temperature, and ambient temperature of the flow battery; analyzing and calculating based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the set temperature of the heater of the flow battery; adjusting the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the flow battery.

[0006] In one embodiment, the analyzing and calculating based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the set temperature of the heater of the flow battery includes: predicting the temperature rise based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the temperature rise parameter of the electrolyte of the flow battery; determining the set temperature of the heater of the flow battery according to the temperature rise parameter and a preset target electrolyte temperature.

[0007] In one embodiment, the temperature rise parameter includes a first temperature rise component and a second temperature rise component. The predicting the temperature rise based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the temperature rise parameter of the electrolyte of the flow battery includes: predicting the temperature rise based on the electrolyte temperature, charge-discharge power, and ambient temperature to determine the first temperature rise component; predicting the temperature rise based on the electrolyte temperature, pump operating power, and ambient temperature to determine the second temperature rise component.

[0008] In one embodiment, the step of predicting the temperature rise according to the electrolyte temperature, the charge-discharge power, and the ambient temperature to determine the first temperature-rise component includes: analyzing and calculating according to the electrolyte temperature, the charge-discharge power, the ambient temperature, and a preset corresponding relationship between the electrolyte temperature, the charge-discharge power, the ambient temperature, and the temperature-rise component to determine the first temperature-rise component; and / or, the step of predicting the temperature rise according to the electrolyte temperature, the pump operating power, and the ambient temperature to determine the second temperature-rise component includes: analyzing and calculating according to the electrolyte temperature, the pump operating power, the ambient temperature, and a preset corresponding relationship between the electrolyte temperature, the pump operating power, the ambient temperature, and the temperature-rise component to determine the second temperature-rise component.

[0009] In one embodiment, the step of predicting the temperature rise according to the electrolyte temperature, the charge-discharge power, and the ambient temperature to determine the first temperature-rise component includes: predicting the first temperature-rise component according to the electrolyte temperature, the charge-discharge power, the ambient temperature, and a first preset temperature-rise prediction model; and / or, the step of predicting the temperature rise according to the electrolyte temperature, the pump operating power, and the ambient temperature to determine the second temperature-rise component includes: predicting the second temperature-rise component according to the electrolyte temperature, the pump operating power, the ambient temperature, and a second preset temperature-rise prediction model.

[0010] In one embodiment, the step of determining the set temperature of the heater of the flow battery according to the temperature-rise parameter and the preset target electrolyte temperature includes: calculating according to the temperature-rise parameter and the preset target electrolyte temperature to determine a first temperature error; performing PID operation analysis according to the first temperature error to determine the set temperature of the heater of the flow battery.

[0011] In one embodiment, the number of the heaters is multiple. The step of performing PID operation analysis according to the first temperature error to determine the set temperature of the heater of the flow battery includes: performing PID operation analysis according to the first temperature error to determine a total set temperature; performing distribution processing according to the total set temperature to determine the set temperature of each heater in the flow battery.

[0012] In one embodiment, the step of adjusting the operating power of the heater according to the heater temperature and the set temperature includes: determining a second temperature error according to the heater temperature and the set temperature; performing PID adjustment according to the second temperature error to change the operating power of the heater.

[0013] A liquid flow battery temperature control system includes a first temperature collector, a second temperature collector, a heater, and a controller. The first temperature collector, the second temperature collector, and the heater are respectively connected to the controller. The first temperature collector is used to collect the electrolyte temperature of the liquid flow battery. The second temperature collector is used to collect the heater temperature of the heater. The heater is used to heat the electrolyte. The controller is used to execute the steps of the above-mentioned liquid flow battery temperature control method.

[0014] A liquid flow battery includes the above-mentioned liquid flow battery temperature control system.

[0015] The above-mentioned liquid flow battery temperature control method, system, and liquid flow battery can obtain the electrolyte temperature, pump operating power, charge-discharge power, heater temperature, and ambient temperature of the liquid flow battery in real time during operation. Then, through analysis and calculation in combination with the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature, the set temperature of the heater of the liquid flow battery is determined. Finally, the operating power of the heater is adjusted in combination with the heater temperature and the set temperature to change the temperature of the electrolyte. The above solution comprehensively considers the pump operating power, charge-discharge power, and ambient temperature during the operation of the liquid flow battery, and realizes the temperature regulation of the electrolyte by changing the operating power of the heater, with high temperature control accuracy. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the structure of a liquid flow battery in an embodiment of the present application;

[0018] Figure 2 It is a schematic flow chart of a liquid flow battery temperature control method in an embodiment of the present application;

[0019] Figure 3 It is a schematic flow chart of a liquid flow battery temperature control method in another embodiment of the present application;

[0020] Figure 4 It is a schematic flow chart of a liquid flow battery temperature control method in yet another embodiment of the present application;

[0021] Figure 5 It is a schematic flow chart of a liquid flow battery temperature control method in still another embodiment of the present application;

[0022] Figure 6Schematic diagram of the liquid flow battery temperature control method in another embodiment of the present application;

[0023] Figure 7 Flow chart of the liquid flow battery temperature control method in an embodiment of the present application. Detailed implementation manners

[0024] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0025] The liquid flow battery temperature control method of the embodiments of the present application is applied to Figure 1 the liquid flow battery shown, which includes a stack, a positive electrolyte storage tank for storing positive electrolyte, a negative electrolyte storage tank for storing negative electrolyte, as well as components such as a circulation pump and a battery management system. Among them, the positive electrode liquid and the negative electrode liquid circulate independently, so circulation pipelines and circulation pumps need to be provided at the positive electrolyte storage tank and the negative electrolyte storage tank respectively to transport the positive electrolyte and the negative electrode liquid to the stack respectively.

[0026] Therefore, when controlling the temperature of the liquid flow battery, the electrolyte temperatures of the positive electrolyte and the negative electrolyte are adjusted independently, that is, both the positive electrolyte and the negative electrode liquid can adopt the liquid flow battery temperature control method provided by the present application to independently realize the adjustment of their respective electrolyte temperatures.

[0027] The liquid flow battery temperature control method of the present application is specifically executed by the controller of the liquid flow battery. Among them, the controller can be a device independently provided outside the battery management system or the battery management system of the liquid flow battery, and no specific limitation is made, and it can be selected according to actual needs.

[0028] Please refer to Figure 2 , the present application provides a liquid flow battery temperature control method, including step 202, step 204 and step 206.

[0029] Step 202, obtain the electrolyte temperature, pump operating power, charge and discharge power, heater temperature and ambient temperature of the liquid flow battery in real time.

[0030] Specifically, the electrolyte temperature refers to the temperature of the electrolyte in the flow battery. The way to obtain it is not unique. A temperature collector can be respectively set in the storage spaces of the positive electrolyte storage tank or the negative electrolyte storage tank, and the electrolyte temperature can be obtained through this temperature collector. In another embodiment, multiple temperature collectors can also be respectively set in the storage spaces of the positive electrolyte storage tank or the negative electrolyte storage tank, and the controller analyzes and calculates according to the collection results of the multiple temperature collectors (such as mean value calculation), and finally determines the electrolyte temperature.

[0031] It should be noted that in the actual scenario, depending on the electrolyte for which temperature regulation is required, the electrolyte temperature can be the temperature of the positive electrolyte or the temperature of the negative electrolyte, and no specific limitation is made.

[0032] The pump operating power refers to the operating power of the circulation pump used to promote the circulation of the electrolyte during the operation of the flow battery. The charge-discharge power refers to the charging power or the discharging power during the actual operation of the flow battery. It can be understood that if the flow battery is in the charging operation, it is the charging power, and if the flow battery is in the discharging operation, it is the discharging power. The heater temperature refers to the temperature of the heater itself during the heating operation. The ambient temperature refers to the temperature of the environment where the flow battery is located.

[0033] Combined with the actual adjustment requirements, the controller can obtain the temperature of the positive electrolyte, the pump operating power of the circulation pump that promotes the circulation of the positive electrolyte, the temperature of the heater that heats the positive electrolyte, as well as the charge-discharge power and the ambient temperature of the flow battery, and control the temperature of the positive electrode liquid. And / or obtain the temperature of the negative electrolyte, the pump operating power of the circulation pump that promotes the circulation of the negative electrolyte, the temperature of the heater that heats the negative electrolyte, as well as the charge-discharge power and the ambient temperature of the flow battery, and control the temperature of the negative electrode liquid.

[0034] Step 204, perform analysis and calculation based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the set temperature of the heater of the flow battery.

[0035] Specifically, the set temperature refers to the temperature that the heater needs to reach during operation. The heater is a device set in the flow battery to heat the electrolyte of the flow battery. The type, quantity, and installation position of the heater are not unique, as long as it can achieve the heating of the electrolyte, and no specific limitation is made. In one embodiment, heaters are respectively set for the positive electrolyte and the negative electrolyte for heating, and the number of heaters set at the positive electrolyte and the number of heaters set at the negative electrolyte can be the same or different, and can be specifically set according to the actual requirements.

[0036] After obtaining the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature, the controller will perform analysis and calculation based on these to obtain the temperature that the heater needs to reach when adjusting the electrolyte temperature to the required temperature, that is, the set temperature.

[0037] Step 206: Adjust the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the flow battery.

[0038] Specifically, after the controller obtains the heater temperature and the set temperature, if the heater temperature and the set temperature are inconsistent, the heater temperature can be adjusted to the set temperature by increasing or decreasing the operating power of the heater, and the operating power of the heater is changed to achieve the adjustment of the electrolyte temperature.

[0039] The above flow battery temperature control method can obtain the electrolyte temperature, pump operating power, charge-discharge power, heater temperature, and ambient temperature of the flow battery in real time during operation, and then perform analysis and calculation in combination with the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the set temperature of the heater of the flow battery. Finally, the operating power of the heater is adjusted in combination with the heater temperature and the set temperature to change the temperature of the electrolyte. The above solution comprehensively considers the pump operating power, charge-discharge power, and ambient temperature during the operation of the flow battery, and realizes the adjustment of the electrolyte temperature by changing the operating power of the heater, with high temperature control accuracy.

[0040] Please refer to Figure 3 , in one of the embodiments, step 204 includes step 302 and step 304.

[0041] Step 302: Perform temperature rise prediction based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the temperature rise parameter of the electrolyte of the flow battery.

[0042] Step 304: Determine the set temperature of the heater of the flow battery according to the temperature rise parameter and the preset target electrolyte temperature.

[0043] Specifically, the temperature rise prediction is to predict the change temperature of the electrolyte caused by the operation of the circulation pump, charge-discharge cycle, and ambient temperature. Specifically, if the temperature rise parameter obtained by the temperature rise prediction is positive, it means that the current operating state will cause the electrolyte temperature to rise, and if the temperature rise parameter is negative, it means that the current operating state will cause the electrolyte temperature to drop. The preset target electrolyte temperature is the normal operating temperature of the electrolyte set in advance. According to actual needs, the preset target electrolyte temperature can be a temperature threshold or a temperature range, and is not specifically limited.

[0044] In an actual scenario, the operation of the circulation pump, the ambient temperature, and the charge and discharge operation of the flow battery will all cause temperature changes in the electrolyte. Therefore, in the solution of this embodiment, the temperature changes of the electrolyte caused by the operation of the circulation pump, charge and discharge cycles, and ambient temperature are actually considered, and the electrolyte temperature is adjusted in advance so that the electrolyte temperature can better follow the application scenario and operate at a preset target electrolyte temperature, effectively ensuring the temperature stability of the electrolyte.

[0045] Please refer to Figure 4 , in one embodiment, the temperature rise parameter includes a first temperature rise component and a second temperature rise component, and step 302 includes step 402 and step 404.

[0046] Step 402, perform a temperature rise prediction based on the electrolyte temperature, charge and discharge power, and ambient temperature to determine the first temperature rise component.

[0047] Step 404, perform a temperature rise prediction based on the electrolyte temperature, pump operation power, and ambient temperature to determine the second temperature rise component.

[0048] Specifically, the first temperature rise component refers to the temperature change amount of the electrolyte caused by the combined action of the ambient temperature and charge and discharge cycles. The second temperature rise component refers to the temperature change amount of the electrolyte caused by the combined action of the ambient temperature and the circulation pump. In the solution of this embodiment, the controller can perform a primary temperature rise prediction by combining the electrolyte temperature, charge and discharge power, and ambient temperature, perform another temperature rise prediction by combining the electrolyte temperature, pump operation power, and ambient temperature, and perform the given temperature calculation of the heater by combining the finally obtained first temperature rise component and second temperature rise component, as well as the preset target electrolyte temperature, with relatively high given temperature calculation accuracy.

[0049] It can be understood that in other embodiments, it is also possible to perform temperature rise predictions separately with the charge and discharge power, pump operation power, and ambient temperature respectively to obtain three temperature rise components, and perform the given temperature calculation based on this. That is, perform a primary temperature rise prediction by combining the electrolyte temperature and charge and discharge power, perform another temperature rise prediction by combining the electrolyte temperature and pump operation power, and perform another temperature rise prediction by combining the electrolyte temperature and ambient temperature, and specifically select according to actual requirements.

[0050] In one embodiment, performing a temperature rise prediction based on the electrolyte temperature, charge and discharge power, and ambient temperature to determine the first temperature rise component includes: performing a matching analysis based on historical temperature rise data, electrolyte temperature, charge and discharge power, and ambient temperature to determine the first temperature rise component; and / or, performing a temperature rise prediction based on the electrolyte temperature, pump operation power, and ambient temperature to determine the second temperature rise component includes: performing a matching analysis based on historical temperature rise data, electrolyte temperature, pump operation power, and ambient temperature to determine the second temperature rise component.

[0051] Specifically, the historical temperature rise data refers to the relevant historical data of the temperature rise of the electrolyte of the flow battery following the changes in the charge-discharge power, pump operation power, and ambient temperature. When predicting the temperature rise of the electrolyte, the specific prediction method is not unique. The solution of this embodiment can analyze in combination with the historical temperature rise data of the electrolyte and use the temperature rise under the same historical working conditions as the temperature rise component. For example, in one embodiment, a working condition where the electrolyte temperature, pump operation power, and ambient temperature are all the same as the current ones is found in the historical temperature rise data, and the temperature rise under this working condition is used as the first temperature rise component.

[0052] In the above solution, the first temperature rise component and / or the second temperature rise component are determined by predicting with the historical temperature rise data, without complex operation calculations, which can effectively relieve the calculation pressure.

[0053] In one embodiment, predicting the temperature rise based on the electrolyte temperature, charge-discharge power, and ambient temperature to determine the first temperature rise component includes: analyzing and calculating according to the electrolyte temperature, charge-discharge power, ambient temperature, and the preset corresponding relationship between the electrolyte temperature, charge-discharge power, ambient temperature, and the temperature rise component to determine the first temperature rise component; and / or, predicting the temperature rise based on the electrolyte temperature, pump operation power, and ambient temperature to determine the second temperature rise component includes: analyzing and calculating according to the electrolyte temperature, pump operation power, ambient temperature, and the preset corresponding relationship between the electrolyte temperature, pump operation power, ambient temperature, and the temperature rise component to determine the second temperature rise component.

[0054] Specifically, the preset corresponding relationship between the electrolyte temperature, charge-discharge power, ambient temperature, and the temperature rise component refers to the preset corresponding relationship in which the temperature rise component changes following the changes in these three factors: the electrolyte temperature, charge-discharge power, and ambient temperature; this corresponding relationship can be measured through multiple experiments in advance and stored in the controller. The preset corresponding relationship between the electrolyte temperature, pump operation power, ambient temperature, and the temperature rise component refers to the preset corresponding relationship in which the temperature rise component changes following the changes in these three factors: the electrolyte temperature, pump operation power, and ambient temperature; this corresponding relationship can also be measured through multiple experiments in advance and stored in the controller.

[0055] It should be noted that the above two corresponding relationships are not unique. In one embodiment, they can be stored in the form of a graph, table, or database. In other embodiments, this corresponding relationship can also be a relationship curve or functional relationship fitted based on experimental data, and no specific limitation is made.

[0056] In one embodiment, temperature rise prediction is performed based on the electrolyte temperature, charge-discharge power, and ambient temperature to determine a first temperature rise component, including: predicting the first temperature rise component according to the electrolyte temperature, charge-discharge power, ambient temperature, and a first preset temperature rise prediction model; and / or, performing temperature rise prediction based on the electrolyte temperature, pump operating power, and ambient temperature to determine a second temperature rise component, including: predicting the second temperature rise component according to the electrolyte temperature, pump operating power, ambient temperature, and a second preset temperature rise prediction model.

[0057] Specifically, the first preset temperature rise prediction model and the second preset temperature rise prediction model can be obtained through machine learning or model training by combining the historical heating data of the flow battery. Specifically, machine learning or model training can be performed by combining the heating data of multiple flow batteries of the same type under different working conditions, which will not be elaborated here.

[0058] The solution of this embodiment can obtain the first preset temperature rise prediction model and the second preset temperature rise prediction model in advance through machine learning, model training, etc., and then use the prediction model for prediction to obtain the first temperature rise component and / or the second temperature rise component, with relatively high temperature rise prediction accuracy.

[0059] Please refer to Figure 5 , in one embodiment, step 304 includes step 502 and step 504.

[0060] Step 502, calculate according to the temperature rise parameter and the preset target electrolyte temperature to determine a first temperature error.

[0061] Step 504, perform PID operation analysis according to the first temperature error to determine the set temperature of the heater of the flow battery.

[0062] Specifically, PID (Proportional Integral Derivative) is a control method that forms a control deviation based on the given value and the actual output value, and forms a control quantity through linear combination of the deviation by proportion (P), integral (I), and differential (D) to control the controlled object. In the solution of this embodiment, a temperature deviation, that is, a first temperature error, is formed according to the temperature rise parameter and the preset target electrolyte temperature, and the first temperature error is linearly combined according to proportion-integral-differential to obtain a control quantity for regulating the electrolyte temperature. After that, after processing such as normalization and energy mapping of the control quantity, the electrolyte temperature required under this control quantity is mapped to the temperature required by the heater, that is, the set temperature of the heater.

[0063] The solution of this embodiment converts the adjustment of the electrolyte temperature into the adjustment of the heater temperature in the form of PID operation, with relatively high accuracy in analyzing the set temperature.

[0064] Please refer to Figure 6 , in one embodiment, the number of heaters is multiple, and step 504 includes step 602 and step 604.

[0065] Step 602, perform PID operation analysis according to the first temperature error to determine the total set temperature.

[0066] Step 604, perform distribution processing according to the total set temperature to determine the set temperature of each heater in the flow battery.

[0067] Specifically, the total set temperature refers to the set temperature that the heaters need to reach as a whole when adjusting the electrolyte temperature to the preset target electrolyte temperature in the current scenario. In the solution of this embodiment, the number of heaters is multiple. To make the set temperature finally shown by the heaters be the total set temperature, different heaters need to be adjusted to their respective corresponding set temperatures respectively, and this set temperature is processed by combining the total set temperature for distribution.

[0068] Specifically, in one embodiment, the controller will determine the total energy required to be generated by the heaters in combination with the total set temperature, and then distribute the total energy to each heater according to a certain ratio. The energy distributed to each heater can be further converted into the temperature that the heater needs to adjust. Combining the current heater temperature and the temperature that needs to be adjusted, the set temperature of each heater can be obtained.

[0069] In the above solution, during the process of heating the electrolyte by multiple heaters, PID operation analysis can be performed in combination with the first temperature error to configure corresponding set temperatures for different heaters. By controlling each heater to operate at the corresponding set temperature respectively, the electrolyte heating is completed, further improving the heating control accuracy and reducing the temperature error.

[0070] In one embodiment, adjusting the operating power of the heater according to the heater temperature and the set temperature includes: determining a second temperature error according to the heater temperature and the set temperature; performing PID adjustment according to the second temperature error to change the operating power of the heater.

[0071] Specifically, after the controller obtains the heater temperature and the set temperature, it will use the difference between the two as the deviation and the set temperature as the set value for PID adjustment. By changing the operating power of the heater, the temperature of the heater is adjusted to the set temperature. In this way, the adjustment of the electrolyte temperature is decomposed into the control of the heater temperature. As long as the temperature of each heater is adjusted to the set temperature, the electrolyte temperature can be accurately adjusted to the preset target electrolyte temperature, and the temperature control response speed and accuracy are improved in the way of multi-stage PID control.

[0072] It should be noted that, in one embodiment, the flow battery provided by the embodiments of the present application should also be configured with a cooling system. The electrolyte temperature can be lowered through the cooling system. The cooling system and the heater of the present application operate independently. The method for controlling the temperature of the flow battery in this embodiment is mainly used to raise the electrolyte temperature when the electrolyte temperature is too low. When the electrolyte temperature is already relatively high, the heater can be turned off (i.e., the set temperature is configured to 0), and it can be set specifically according to actual requirements.

[0073] Please refer to Figure 7 , for the convenience of understanding the technical solution of the present application, the present application will be explained in detail below with reference to relatively detailed embodiments.

[0074] During the operation of the flow battery, the controller real-time obtains the electrolyte temperature, pump operation power, charge and discharge power, heater temperature, and ambient temperature, and combines the historical temperature rise data, electrolyte temperature, charge and discharge power, and ambient temperature to perform temperature rise prediction to obtain the first temperature rise component. Combine the historical temperature rise data, electrolyte temperature, pump operation power, and ambient temperature to perform temperature rise prediction to obtain the second temperature rise component.

[0075] After that, calculate by combining the electrolyte temperature, the first temperature rise component, the second temperature rise component, and the preset target electrolyte temperature to determine the first temperature error. Perform PID analysis with the first temperature error as the deviation to obtain the control amount required at this time, and perform conversion processing with this control amount to obtain the total set temperature of the heater. After that, the controller determines the heating amount according to the total set temperature, distributes the heating amount to the first heater and the second heater, and determines the set temperatures of the first heater and the second heater.

[0076] Finally, for the two heaters, the controller calculates the second temperature error respectively according to their set temperatures and heater temperatures, and performs PID adjustment with this as the deviation to obtain the operating power required by the heater, and changes the heater temperature by adjusting the operating power of the heater, thereby realizing the adjustment of the electrolyte temperature.

[0077] It should be understood that although the steps in the flowcharts involved in the above-mentioned embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps in other steps.

[0078] Based on the same inventive concept, an embodiment of the present application further provides a liquid flow battery temperature control device for implementing the liquid flow battery temperature control method involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the liquid flow battery temperature control device provided below can refer to the limitations on the liquid flow battery temperature control method in the foregoing, and will not be elaborated here.

[0079] A liquid flow battery temperature control device includes a parameter acquisition module, a temperature analysis module, and a power adjustment module. The parameter acquisition module is used to obtain the electrolyte temperature, pump operating power, charge and discharge power, heater temperature, and ambient temperature of the liquid flow battery in real time; the temperature analysis module is used to perform analysis and calculation based on the electrolyte temperature, pump operating power, charge and discharge power, and ambient temperature to determine the set temperature of the heater of the liquid flow battery; the power adjustment module is used to adjust the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the liquid flow battery.

[0080] In one embodiment, the temperature analysis module is further used to perform temperature rise prediction based on the electrolyte temperature, pump operating power, charge and discharge power, and ambient temperature to determine the temperature rise parameter of the electrolyte of the liquid flow battery; and determine the set temperature of the heater of the liquid flow battery according to the temperature rise parameter and the preset target electrolyte temperature.

[0081] In one embodiment, the temperature analysis module is further used to perform temperature rise prediction based on the electrolyte temperature, charge and discharge power, and ambient temperature to determine the first temperature rise component; and perform temperature rise prediction based on the electrolyte temperature, pump operating power, and ambient temperature to determine the second temperature rise component.

[0082] In one embodiment, the temperature analysis module is further used to perform calculation based on the temperature rise parameter and the preset target electrolyte temperature to determine the first temperature error; and perform PID operation analysis based on the first temperature error to determine the set temperature of the heater of the liquid flow battery.

[0083] In one embodiment, the temperature analysis module is further used to perform PID operation analysis based on the first temperature error to determine the total set temperature; and perform distribution processing based on the total set temperature to determine the set temperature of each heater in the liquid flow battery.

[0084] In one embodiment, the power adjustment module is further used to determine the second temperature error according to the heater temperature and the set temperature; and perform PID adjustment based on the second temperature error to change the operating power of the heater.

[0085] Each module in the above-mentioned liquid flow battery temperature control device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in the processor of a computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0086] This application also provides a computer device, which can be a terminal. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a liquid flow battery temperature control method.

[0087] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0088] Obtain the electrolyte temperature, pump operating power, charge and discharge power, heater temperature, and ambient temperature of the liquid flow battery in real time; perform analysis and calculation based on the electrolyte temperature, pump operating power, charge and discharge power, and ambient temperature to determine the set temperature of the heater of the liquid flow battery; adjust the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the liquid flow battery.

[0089] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the following steps are implemented:

[0090] Obtain the electrolyte temperature, pump operating power, charge and discharge power, heater temperature, and ambient temperature of the liquid flow battery in real time; perform analysis and calculation based on the electrolyte temperature, pump operating power, charge and discharge power, and ambient temperature to determine the set temperature of the heater of the liquid flow battery; adjust the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the liquid flow battery.

[0091] In one embodiment, a computer program product is provided, including a computer program which, when executed by a processor, implements the following steps:

[0092] Obtain in real time the electrolyte temperature, pump operating power, charge-discharge power, heater temperature, and ambient temperature of the flow battery; perform analysis and calculation based on the electrolyte temperature, pump operating power, charge-discharge power, and ambient temperature to determine the set temperature of the heater of the flow battery; adjust the operating power of the heater according to the heater temperature and the set temperature to change the temperature of the electrolyte of the flow battery.

[0093] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAMs), magnetoresistive random access memories (MRAMs), ferroelectric random access memories (FRAMs), phase change memories (PCMs), graphene memories, etc. Volatile memories can include random access memory (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0094] The present application also provides a temperature control system for a flow battery, which includes a first temperature collector, a second temperature collector, a heater, and a controller. The first temperature collector is disposed in the electrolyte of the flow battery, and the second temperature collector is disposed on the heater. The first temperature collector, the second temperature collector, and the heater are respectively connected to the controller. The heater is used to heat the electrolyte, and the controller is used to execute the steps of the above-mentioned flow battery temperature control method.

[0095] Specifically, the specific implementation manner of the flow battery temperature control method is as shown in the above various embodiments and the drawings, and will not be elaborated herein. During the operation of this flow battery temperature control system, the electrolyte temperature, pump operation power, charge-discharge power, heater temperature, and ambient temperature of the flow battery can be obtained in real time. Then, by combining the electrolyte temperature, pump operation power, charge-discharge power, and ambient temperature for analysis and calculation, the set temperature of the heater of the flow battery is determined. Finally, by combining the heater temperature and the set temperature, the operation power of the heater is adjusted to change the temperature of the electrolyte. The above solution comprehensively considers the pump operation power, charge-discharge power, and ambient temperature during the operation of the flow battery, and realizes the temperature adjustment of the electrolyte by changing the operation power of the heater, having a relatively high temperature control accuracy.

[0096] A flow battery includes the above-mentioned flow battery temperature control system.

[0097] Specifically, the flow battery temperature control system is as shown above, and its controller can be the battery management system in the flow battery. During the operation of this flow battery, the electrolyte temperature, pump operation power, charge-discharge power, heater temperature, and ambient temperature of the flow battery can be obtained in real time. Then, by combining the electrolyte temperature, pump operation power, charge-discharge power, and ambient temperature for analysis and calculation, the set temperature of the heater of the flow battery is determined. Finally, by combining the heater temperature and the set temperature, the operation power of the heater is adjusted to change the temperature of the electrolyte. The above solution comprehensively considers the pump operation power, charge-discharge power, and ambient temperature during the operation of the flow battery, and realizes the temperature adjustment of the electrolyte by changing the operation power of the heater, having a relatively high temperature control accuracy.

[0098] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0099] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A flow battery temperature control method, characterized in that: include: Real-time acquisition of flow battery electrolyte temperature, pump operating power, charge and discharge power, heater temperature and ambient temperature; Determining a given temperature of the heater of the flow battery by analyzing and calculating according to the electrolyte temperature, the pump operating power, the charge and discharge power and the ambient temperature; The operating power of the heater is adjusted according to the heater temperature and the given temperature to change the temperature of the electrolyte of the flow battery.

2. The flow battery temperature control method according to claim 1, characterized in that: The step of analyzing and calculating according to the electrolyte temperature, the pump operating power, the charge and discharge power and the ambient temperature to determine the given temperature of the heater of the flow battery comprises: Predicting the temperature rise according to the electrolyte temperature, the pump operating power, the charge and discharge power and the ambient temperature to determine the temperature rise parameter of the electrolyte of the flow battery; The given temperature of the heater of the flow battery is determined according to the temperature rise parameter and the preset target electrolyte temperature.

3. The flow battery temperature control method according to claim 2, characterized in that: The temperature rise parameter includes a first temperature rise component and a second temperature rise component, and the temperature rise prediction is performed according to the electrolyte temperature, the pump operating power, the charge and discharge power and the ambient temperature to determine the temperature rise parameter of the electrolyte of the flow battery, including: Perform temperature rise prediction according to the electrolyte temperature, the charge and discharge power and the ambient temperature to determine a first temperature rise component; A temperature rise prediction is performed based on the electrolyte temperature, the pump operating power and the ambient temperature to determine a second temperature rise component.

4. The flow battery temperature control method according to claim 3, characterized in that: The predicting of temperature rise according to the electrolyte temperature, the charge and discharge power and the ambient temperature to determine the first temperature rise component includes: analyzing and calculating according to the electrolyte temperature, the charge and discharge power, the ambient temperature, and a preset correspondence relationship among the electrolyte temperature, the charge and discharge power, the ambient temperature and the temperature rise component to determine the first temperature rise component; And / or, the temperature rise prediction is performed according to the electrolyte temperature, the pump operating power and the ambient temperature to determine the second temperature rise component, including: analyzing and calculating according to the electrolyte temperature, the pump operating power, the ambient temperature, and the corresponding relationship between the preset electrolyte temperature, pump operating power, ambient temperature and temperature rise component to determine the second temperature rise component.

5. The flow battery temperature control method according to claim 3, characterized in that: The step of predicting the temperature rise according to the electrolyte temperature, the charge and discharge power, and the ambient temperature to determine the first temperature rise component includes: predicting the first temperature rise component according to the electrolyte temperature, the charge and discharge power, the ambient temperature, and a first preset temperature rise prediction model; And / or, performing temperature rise prediction based on the electrolyte temperature, the pump operating power and the ambient temperature to determine the second temperature rise component includes: predicting the second temperature rise component based on the electrolyte temperature, the pump operating power, the ambient temperature and a second preset temperature rise prediction model.

6. The flow battery temperature control method according to any one of claims 2 to 5, characterized in that: The step of determining a given temperature of the heater of the flow battery according to the temperature rise parameter and a preset target electrolyte temperature includes: Calculating according to the temperature rise parameter and a preset target electrolyte temperature to determine a first temperature error; A PID operation analysis is performed according to the first temperature error to determine a given temperature of the heater of the flow battery.

7. The flow battery temperature control method according to claim 6, characterized in that: The number of the heaters is multiple, and the PID operation analysis is performed according to the first temperature error to determine the given temperature of the heater of the flow battery, including: Perform PID operation analysis according to the first temperature error to determine the total given temperature; A distribution process is performed according to the total given temperature to determine the given temperatures of the individual heaters in the liquid flow battery.

8. The flow battery temperature control method according to any one of claims 1 to 5, characterized in that: The step of adjusting the operating power of the heater according to the heater temperature and the given temperature comprises: determining a second temperature error according to the heater temperature and the given temperature; PID regulation is performed according to the second temperature error to change the operating power of the heater.

9. A liquid flow battery temperature control system, characterized in that: The invention comprises a first temperature collector, a second temperature collector, a heater and a controller, wherein the first temperature collector, the second temperature collector and the heater are respectively connected to the controller, the first temperature collector is used to collect the electrolyte temperature of the flow battery, the second temperature collector is used to collect the heater temperature of the heater, the heater is used to heat the electrolyte, and the controller is used to execute the steps of the flow battery temperature control method according to any one of claims 1 to 8.

10. A liquid flow battery, characterized in that: Including the liquid flow battery temperature control system as described in claim 9.

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