CN116130842A - Temperature control method and device of energy storage system and nonvolatile storage medium - Google Patents
Temperature control method and device of energy storage system and nonvolatile storage medium Download PDFInfo
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- CN116130842A CN116130842A CN202310245852.6A CN202310245852A CN116130842A CN 116130842 A CN116130842 A CN 116130842A CN 202310245852 A CN202310245852 A CN 202310245852A CN 116130842 A CN116130842 A CN 116130842A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application discloses a temperature control method and device of an energy storage system and a nonvolatile storage medium. Wherein the method comprises the following steps: acquiring an operating parameter of the energy storage system, wherein the operating parameter comprises at least one of the following: operating current and operating power; determining an operating state of the energy storage system as a function of the operating parameter, wherein the operating state comprises at least one of: a charged state, a discharged state, and a stationary state; determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop; and controlling the start and stop of the cooling equipment according to the equipment start strategy. The method solves the technical problems of refrigeration hysteresis and low temperature equalizing rate caused by the fact that the temperature of the energy storage system is regulated by controlling the start-stop of the internal circulating fan or the internal circulating water pump and the start-stop of the compressor or the heater to be consistent in the related art.
Description
Technical Field
The present disclosure relates to the field of temperature control technologies, and in particular, to a temperature control method and apparatus for an energy storage system, and a nonvolatile storage medium.
Background
The energy storage system comprises a plurality of electric cores, and the temperature of the energy storage system needs to be controlled at a temperature suitable for the operation of the electric cores in order to ensure the normal operation of the energy storage system; if the internal circulation fan is controlled to be frequently opened, the problems of high energy consumption of the temperature control system and shortened service life of the internal circulation fan are caused; the related art adjusts the temperature of the energy storage system by controlling the start-stop of the internal circulation fan and the compressor or the heater to be consistent, so that the technical problems of refrigeration hysteresis and low temperature equalizing rate exist.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a temperature control method and device of an energy storage system and a nonvolatile storage medium, which at least solve the technical problems of refrigeration hysteresis and low temperature equalizing rate caused by the fact that the temperature of the energy storage system is regulated by controlling an internal circulating fan or an internal circulating water pump to be consistent with the start and stop of a compressor or a heater in the related technology.
According to an aspect of an embodiment of the present application, there is provided a temperature control method of an energy storage system, including: acquiring an operating parameter of the energy storage system, wherein the operating parameter comprises at least one of the following: operating current and operating power; determining an operating state of the energy storage system as a function of the operating parameter, wherein the operating state comprises at least one of: a charged state, a discharged state, and a stationary state; determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop; and controlling the start and stop of the cooling equipment according to the equipment start strategy.
Optionally, determining the operation state of the energy storage system according to the operation parameter includes: under the condition that the operation parameter is larger than a preset value, determining that the operation state of the energy storage system is a charging state or a discharging state; and under the condition that the operation parameter is equal to a preset value, determining that the operation state of the energy storage system is a standing state.
Optionally, controlling start-stop of the cooling device according to a device start-up policy includes: when the operating state of the energy storage system is a charging state or a discharging state, a cooling device is started, wherein the cooling device comprises at least one of the following components: air cooling equipment and liquid cooling equipment; and when the running state of the energy storage system is a standing state, acquiring a temperature value of the energy storage system, and controlling the cooling equipment according to the temperature value.
Optionally, the temperature value of the energy storage system includes: the temperature value of air conditioner return air in the energy storage system and a plurality of temperature values of a plurality of electric cores in the energy storage system; controlling the cooling device in dependence on the temperature value, comprising: when the temperature value of the return air of the air conditioner is smaller than a first preset threshold value, controlling the cooling equipment and an electric heater in the energy storage system to be started simultaneously; or under the condition that the temperature value of any one of the plurality of electric cores is smaller than a second preset threshold value, controlling the cooling equipment and the electric heater to be started simultaneously.
Optionally, when the electric heater stops operating and the operating state of the energy storage system is a stationary state, the temperature control method of the energy storage system further includes: acquiring temperatures of a plurality of battery cores in an energy storage system, obtaining a plurality of temperature values, and determining a highest temperature value and a lowest temperature value in the plurality of temperature values; determining the difference value between the highest temperature value and the lowest temperature value as the temperature difference of the energy storage system; the cooling device is controlled in dependence on the temperature difference.
Optionally, controlling the cooling device in dependence of the temperature difference comprises: controlling the cooling equipment to continue to operate under the condition that the temperature difference is larger than a third preset threshold value; and controlling the cooling equipment to stop running under the condition that the temperature difference is smaller than a third preset threshold value.
Optionally, the temperature control method of the energy storage system further comprises: monitoring the state of a compressor in the energy storage system under the condition that the temperature difference is equal to a third preset threshold value; and when the state of the compressor is monitored to be a starting state, controlling the cooling equipment to start simultaneously with the compressor.
According to another aspect of the embodiments of the present application, there is also provided a temperature control device of an energy storage system, including: the system comprises an acquisition module for acquiring operation parameters of the energy storage system, wherein the operation parameters comprise at least one of the following: operating current and operating power; the first determining module is used for determining the operation state of the energy storage system according to the operation parameters, wherein the operation state comprises at least one of the following steps: a charged state, a discharged state, and a stationary state; the second determining module is used for determining a device starting strategy corresponding to the running state, wherein the device starting strategy is used for indicating the triggering conditions of the cooling device of the energy storage system in different running states, and the triggering conditions are used for triggering the cooling device to start or stop; and the control module is used for controlling the start and stop of the cooling equipment according to the equipment start strategy.
According to another aspect of the embodiments of the present application, there is further provided a non-volatile storage medium, where a computer program is stored in the non-volatile storage medium, where a device in which the non-volatile storage medium is located executes the above-mentioned temperature control method of the energy storage system by running the computer program.
According to another aspect of the embodiments of the present application, there is also provided an energy storage temperature control system, including: cooling equipment, an electric heater, and a compressor; the cooling equipment is used for reducing the temperature in the energy storage system to a preset temperature when the energy storage system is in a charging state or a discharging state; the electric heater is used for increasing the temperature of the energy storage system to a preset temperature when the temperature value of any one energy storage module (battery core) in the plurality of energy storage modules (battery cores) is smaller than a fourth preset threshold value; and the compressor is used for maintaining the temperature of the energy storage system at a preset temperature when the energy storage system is in a non-heating state.
According to another aspect of the embodiments of the present application, there is also provided an electronic device, including: a memory in which a computer program is stored, and a processor configured to execute the control method of the temperature control system described above by the computer program.
In an embodiment of the present application, obtaining an operation parameter of the energy storage system is adopted, where the operation parameter includes at least one of the following: operating current and operating power; determining an operating state of the energy storage system as a function of the operating parameter, wherein the operating state comprises at least one of: a charged state, a discharged state, and a stationary state; determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop; the method has the advantages that the method controls the start and stop of the cooling equipment according to the equipment start strategy, achieves the aim of rapidly responding to the heat dissipation requirement of the system by controlling the timely start and stop of the internal circulating fan of the air-cooled air conditioner and the circulating water pump of the liquid cooling unit, thereby realizing the technical effects of reducing the running energy consumption of the internal fan and the circulating water pump of the air-cooled air conditioner, prolonging the service life of the temperature control system, reducing the failure rate of the system and improving the running reliability, and further solving the technical problems of refrigeration hysteresis and low temperature equalization rate caused by the fact that the temperature of the energy storage system is regulated by the method of controlling the start and stop of the internal circulating fan or the internal circulating water pump and the compressor or the heater to be consistent in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a flow chart of a method of temperature control of an energy storage system according to an embodiment of the present application;
FIG. 2 is a block diagram of a temperature control device of an energy storage system according to an embodiment of the present application;
FIG. 3 is a flow chart of temperature control of an energy storage system in an air-cooled mode according to an embodiment of the present application;
FIG. 4 is a flow chart of temperature control of an energy storage system in a liquid cooling mode according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an energy storage temperature control system according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the related art, an internal circulation fan in an energy storage temperature control system is kept in a normally open state or is kept consistent with the start and stop of a compressor; because a great amount of standing time exists when the energy storage system actually operates, the internal circulation fan is kept in a normally open state, so that more energy consumption is wasted; if the start and stop of the internal circulation fan and the compressor or the heater are kept consistent, the uniform temperature rate of the system is greatly reduced; when the internal circulation fan is closed, the air conditioner cannot monitor the actual temperature of air in the battery compartment and cannot refrigerate in time when the battery cell heats; therefore, there are problems of refrigeration hysteresis and low average temperature rate. In order to solve this problem, related solutions are provided in the embodiments of the present application, and are described in detail below.
According to embodiments of the present application, there is provided a method embodiment of a temperature control method for an energy storage system, it being noted that the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and that although a logical sequence is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in a different order than what is illustrated herein.
Fig. 1 is a flowchart of a temperature control method of an energy storage system according to an embodiment of the present application, as shown in fig. 1, the method includes the following steps:
step S102, obtaining operation parameters of the energy storage system, wherein the operation parameters comprise at least one of the following: operating current and operating power.
In the temperature control method of the energy storage system provided by the embodiment of the application, different starting strategies are set according to different operation states of the energy storage system, so that when the temperature of the energy storage system is regulated, firstly, the operation parameters of the energy storage system are obtained through step S102 to determine the current operation state of the energy storage system according to the operation parameters of the energy storage system, wherein the operation parameters can be the operation current of the energy storage system or the operation power of the energy storage system, and can also be other operation parameters capable of judging the current operation state of the energy storage system.
Step S104, determining an operation state of the energy storage system according to the operation parameters, wherein the operation state comprises at least one of the following: a charged state, a discharged state, and a stationary state.
In step S104, it is determined whether the energy storage system is currently in an operating state or in a stationary state according to the operation parameters of the energy storage system acquired in step S102, wherein the operating state includes both a charging state and a discharging state.
Step S106, determining a device starting strategy corresponding to the operation state, wherein the device starting strategy is used for indicating the triggering conditions of the cooling device of the energy storage system in different operation states, and the triggering conditions are used for triggering the cooling device to start or stop.
In step S106, after determining the operating state of the energy storage system, different device start-up policies are applied for different states.
Step S108, controlling the start-stop of the cooling equipment according to the equipment start-up strategy.
In step S108, the cooling device in the energy storage system is triggered to start or stop operating under different triggering conditions according to the different starting strategies determined in step S106.
Through the steps, the timely start and stop of the circulating fan in the air conditioner or the circulating water pump of the liquid cooling unit can be controlled, the quick response of the temperature control system in the energy storage system is realized, the temperature in the energy storage system is quickly balanced, and the energy saving to the greatest extent is realized on the premise of reducing the running cost of the system.
According to an alternative embodiment of the present application, determining an operating state of an energy storage system based on an operating parameter includes: under the condition that the operation parameter is larger than a preset value, determining that the operation state of the energy storage system is a charging state or a discharging state; and under the condition that the operation parameter is equal to a preset value, determining that the operation state of the energy storage system is a standing state.
In this embodiment, the method for determining the operation state of the energy storage system according to the operation parameters of the energy storage system is as follows: comparing the operation parameters of the energy storage system acquired in the step S102 with preset values, and if the operation parameters of the energy storage system are larger than the preset values, confirming that the energy storage system is in a current working state (comprising a charging state and a discharging state); and if the operation parameters of the energy storage system are equal to preset values, determining that the energy storage system is in a standing state currently. In practical application, the operation state of the energy storage system is judged through the operation parameters such as the operation power or the operation current of the energy storage system, for example, the preset value is set to 0, and when the operation current of the energy storage system is greater than 0 or the operation power of the energy storage system is greater than 0, the operation state of the energy storage system is considered to be a charging/discharging state; when the operation power of the energy storage system is equal to 0 or the operation current is equal to 0, the operation state of the energy storage system is considered to be a standing state.
According to another alternative embodiment of the present application, controlling start-up and shut-down of a cooling device according to a device start-up strategy includes: when the operating state of the energy storage system is a charging state or a discharging state, a cooling device is started, wherein the cooling device comprises at least one of the following components: air cooling equipment and liquid cooling equipment; and when the running state of the energy storage system is a standing state, acquiring a temperature value of the energy storage system, and controlling the cooling equipment according to the temperature value.
In the embodiment of the application, different equipment starting strategies are set for the working states (including a charging state and a discharging state) of the energy storage system; because the energy storage system is in a charging state or a discharging state and operates to release heat, the temperature in the energy storage system is increased, in this embodiment, the charging state and the discharging state are considered to belong to the working states of the energy storage system, in this embodiment, the energy storage system in the charging state and the discharging state share one equipment starting strategy, and the energy storage system in the standing state adopts another equipment starting strategy. Specifically, when the energy storage system is monitored to be in a charging state or a discharging state, a cooling device in the energy storage system is started, when the energy storage system is monitored to be in a standing state, the current temperature of the energy storage system is obtained, and whether the cooling device in the energy storage system is started or the cooling device in the energy storage system is closed is determined according to the current temperature of the energy storage system.
It should be noted that, the method provided by the embodiment of the application is simultaneously applicable to the energy storage system in the air cooling mode and the energy storage system in the liquid cooling mode, if the energy storage system is cooled by the air cooling mode, an air cooling device in the energy storage system, such as an internal circulation fan, is started, and if the energy storage system is cooled by the liquid cooling mode, a liquid cooling device in the energy storage system, such as a circulating water pump, is started.
According to the method of determining whether to start or shut down a cooling device in an energy storage system according to a current temperature of the energy storage system mentioned in the previous embodiment, wherein the temperature value of the energy storage system comprises: the temperature value of air conditioner return air in the energy storage system and a plurality of temperature values of a plurality of electric cores in the energy storage system; controlling the cooling device in dependence on the temperature value, comprising: when the temperature value of the return air of the air conditioner is smaller than a first preset threshold value, controlling the cooling equipment and an electric heater in the energy storage system to be started simultaneously; or under the condition that the temperature value of any one of the plurality of electric cores is smaller than a second preset threshold value, controlling the cooling equipment and the electric heater to be started simultaneously.
In this embodiment, when it is monitored that the energy storage system is in a standing state, the method of determining whether to start the cooling device in the energy storage system or to close the cooling device in the energy storage system according to the current temperature of the energy storage system is as follows, where the current temperature of the energy storage system may be determined according to the temperature of the battery cell in the energy storage system or may be determined according to the return air temperature of the air conditioner in the energy storage system. When the temperature of the energy storage system is determined according to the air-conditioning return temperature, the air-conditioning return temperature of the circulating system is obtained, the air-conditioning return temperature is compared with a preset air-conditioning return temperature minimum value (namely a first preset threshold), if the air-conditioning return temperature is lower than the preset air-conditioning return temperature minimum value (namely the first preset threshold), the electric heater is determined to be started to heat the energy storage system, and meanwhile, the internal circulating fan or the circulating water pump is started to avoid the temperature in the energy storage system from being too high. When the temperature of the energy storage system is determined according to the temperature of the electric cores in the energy storage system, the temperature of each electric core in the energy storage system is obtained, the temperature of each electric core is compared with the preset lowest temperature (namely the second preset threshold value) of the electric core, as long as the temperature of one electric core in the energy storage system is lower than the preset lowest temperature (namely the second preset threshold value) of the electric core, the electric heater is determined to be started to heat the energy storage system, and meanwhile, the internal circulation fan or the circulating water pump is started to avoid the overhigh temperature in the energy storage system.
According to the above embodiment, when the electric heater is stopped and the operation state of the energy storage system is a stationary state, the temperature control method of the energy storage system further includes: acquiring temperatures of a plurality of battery cores in an energy storage system, obtaining a plurality of temperature values, and determining a highest temperature value and a lowest temperature value in the plurality of temperature values; determining the difference value between the highest temperature value and the lowest temperature value as the temperature difference of the energy storage system; the cooling device is controlled in dependence on the temperature difference.
In this embodiment, the purpose of heating the energy storage system is to control the temperature in the energy storage system within a temperature range suitable for the operation of the battery cell, so when the energy storage system is in a static state, it is determined whether the electric heater is operated, and as long as the electric heater is operated, the cooling device (an internal circulation fan or a circulation water pump) in the energy storage system is in an operation state in order to avoid the excessive temperature in the energy storage system; if the energy storage system is in a standing state and the electric heater is detected to be turned off, determining whether to turn off the cooling device according to a temperature difference in the energy storage system, wherein the temperature difference of the energy storage system is determined by the following method: the method comprises the steps of obtaining a temperature value of each electric core in the energy storage system, determining a highest temperature value and a lowest temperature value from the temperature values of a plurality of electric cores, and determining a difference value between the highest temperature value and the lowest temperature value of the electric cores as a temperature difference value of the energy storage system.
According to an alternative embodiment of the present application, a cooling device is controlled in accordance with a temperature difference, comprising: controlling the cooling equipment to continue to operate under the condition that the temperature difference is larger than a third preset threshold value; and controlling the cooling equipment to stop running under the condition that the temperature difference is smaller than a third preset threshold value.
In this embodiment, the method for controlling the internal circulation fan/water pump in the energy storage system according to the temperature difference determined by the highest temperature of the battery cell and the lowest temperature of the battery cell mentioned in the previous embodiment is as follows: the temperature difference of the energy storage system is recorded as delta T, and the preset temperature difference threshold value (namely a third preset threshold value) is recorded as T 0 The temperature difference delta T is compared with the temperature difference threshold T 0 (i.e., a third preset threshold) T 0 For comparison, if Δt>T 0 Controlling a cooling device in an energy storage system based on maintaining an operational state if Δt<T 0 And controlling the cooling equipment in the energy storage system to be closed.
According to some preferred embodiments of the present application, the method for controlling the temperature of the energy storage system further comprises: monitoring the state of a compressor in the energy storage system under the condition that the temperature difference is equal to a third preset threshold value; and when the state of the compressor is monitored to be a starting state, controlling the cooling equipment to start simultaneously with the compressor.
In the present embodiment, if the temperature difference Δt of the energy storage system is equal to the temperature difference threshold T 0 (namely, a third preset threshold value), monitoring the running state of a compressor in the energy storage system in real time, and starting cooling equipment (an internal circulation fan/water pump) of the energy storage system when the running of the compressor is monitored, so as to ensure the compressor and the water pump of the energy storage systemThe cooling device is started at the same time.
Fig. 2 is a block diagram of a temperature control device of an energy storage system according to an embodiment of the present application, as shown in fig. 2, the device includes: an obtaining module 20, configured to obtain an operation parameter of the energy storage system, where the operation parameter includes at least one of: operating current and operating power; a first determining module 22, configured to determine an operation state of the energy storage system according to the operation parameter, where the operation state includes at least one of: a charged state, a discharged state, and a stationary state; a second determining module 24, configured to determine a device start policy corresponding to an operation state, where the device start policy is configured to instruct a triggering condition of a cooling device of the energy storage system in a different operation state, where the triggering condition is configured to trigger the cooling device to start or stop; a control module 26 for controlling the start-up and shut-down of the cooling device according to a device start-up strategy.
Fig. 3 is a flow chart of temperature control of an energy storage system in an air cooling mode, when the temperature control device provided in this embodiment is applied to the energy storage system in the air cooling mode as shown in fig. 3, the operation parameters (operation power or operation current) of the energy storage system are collected by the obtaining module 20, the operation state of the energy storage system and the corresponding equipment starting policy are determined according to the operation parameters of the energy storage system by the first determining module 22 and the second determining module 24, when the energy storage system is determined to be in a working state (a charging state and a discharging state), the air cooling equipment such as an internal circulation fan is started by the control module 26, if the operation state of the energy storage system is in a standing state, whether the system needs to be heated is determined according to a plurality of battery core temperature values or air conditioner return temperature values in the energy storage system, when the energy storage system needs to be heated, the electric heater and the internal circulation fan in the energy storage system are controlled by the control module 26 to be started simultaneously, otherwise, if the energy storage system does not need to be heated, the compressor in the energy storage system is controlled to be started simultaneously with the internal circulation fan by the control module 26. In addition, under the condition that the energy storage system is not required to be heated (namely when the electric heater stops running), the highest temperature and the lowest temperature of the battery cell in the energy storage system are collected, the difference value between the highest temperature and the lowest temperature is determined as the temperature difference delta T of the energy storage system, and the temperature difference delta T is compared with the temperature difference threshold T 0 In contrast, if the temperature difference Deltat is less than the temperature difference threshold T 0 The internal circulation fan is controlled to continue to operate by the control module 26, if the temperature difference delta T is greater than the temperature difference threshold T 0 The internal circulation fan is controlled to stop running by the control module 26.
Fig. 4 is a flow chart of temperature control of an energy storage system in a liquid cooling mode, where when the temperature control device provided in this embodiment is applied to the energy storage system in the liquid cooling mode as shown in fig. 4, the operation parameters (operation power or operation current) of the energy storage system are collected by the obtaining module 20, the operation states of the energy storage system and the corresponding device starting policy are determined according to the operation parameters of the energy storage system by the first determining module 22 and the second determining module 24, when the energy storage system is determined to be in a working state (a charging state and a discharging state), the liquid cooling device, such as a circulating water pump, is started by the control module 26, if the operation state of the energy storage system is in a standing state, it is determined that the system needs to be heated according to a plurality of electric core temperature values or air conditioner return temperature values in the energy storage system, when the energy storage system needs to be heated, the electric heater and the circulating water pump in the energy storage system are controlled by the control module 26 to be started simultaneously, otherwise, if the energy storage system does not need to be heated, the compressor and the circulating water pump in the energy storage system are controlled to be started simultaneously by the control module 26. In addition, under the condition that the energy storage system is not required to be heated (namely when the electric heater stops running), the highest temperature and the lowest temperature of the battery cell in the energy storage system are collected, the difference value between the highest temperature and the lowest temperature is determined as the temperature difference delta T of the energy storage system, and the temperature difference delta T is compared with the temperature difference threshold T 0 In contrast, if the temperature difference Deltat is less than the temperature difference threshold T 0 The circulating water pump is controlled to continue to operate through the control module 26, if the temperature difference delta T is larger than the temperature difference threshold T 0 The circulating water pump is controlled to stop running by the control module 26.
By the method provided by the embodiment of the application, the temperature control system in the energy storage system is controlled to be in a normally open state when the energy storage system is in a working state (comprising a charging state and a discharging state); when the energy storage system stands still, whether the cooling equipment is closed or not is judged according to the working state of an electric heater in the energy storage system and the temperature difference of the energy storage system, so that the problems of high energy consumption of the energy storage system and short service life of the cooling equipment caused by the fact that the cooling equipment (an internal circulating fan and a circulating water pump) is normally opened are avoided; on the premise of ensuring the rapid response system heat dissipation and temperature equalization requirements, the running energy consumption of the internal circulation fan and the circulating water pump is greatly reduced, the running economy of the energy storage system is improved, and the maximum energy conservation is realized.
It should be noted that, the preferred implementation manner of the embodiment shown in fig. 2 may refer to the related description of the embodiment shown in fig. 1, which is not repeated herein.
The embodiment of the application also provides a nonvolatile storage medium, wherein the nonvolatile storage medium stores a computer program, and equipment where the nonvolatile storage medium is located executes the temperature control method of the energy storage system by running the computer program.
The above-described nonvolatile storage medium is used to store a program that performs the following functions: acquiring an operating parameter of the energy storage system, wherein the operating parameter comprises at least one of the following: operating current and operating power; determining an operating state of the energy storage system as a function of the operating parameter, wherein the operating state comprises at least one of: a charged state, a discharged state, and a stationary state; determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop; and controlling the start and stop of the cooling equipment according to the equipment start strategy.
According to another aspect of the embodiments of the present application, there is also provided an energy storage temperature control system, including: cooling equipment, an electric heater, and a compressor; the cooling equipment is used for reducing the temperature in the energy storage system to a preset temperature when the energy storage system is in a charging state or a discharging state; the electric heater is used for increasing the temperature of the energy storage system to a preset temperature when the temperatures of the energy storage modules (battery cells) are smaller than a fourth preset threshold value; and the compressor is used for maintaining the temperature of the energy storage system at a preset temperature when the energy storage system is in a non-heating state.
FIG. 5 is a schematic diagram of an energy storage temperature control system, as shown in FIG. 5, including the following devices/modules: the cooling equipment is used for cooling the energy storage system when the energy storage system is in a charging state or a discharging state, wherein the cooling equipment is an internal circulating fan if the energy storage system is in an air cooling mode, and is a circulating water pump if the energy storage system is in a liquid cooling mode; the electric heater is used for heating the energy storage system when the temperatures of the plurality of energy storage modules (battery cells) in the energy storage system are lower than a battery cell temperature threshold (namely a fourth preset threshold) or the air conditioner return air temperature of the energy storage system is lower than an air conditioner return air temperature threshold; and a compressor for maintaining the temperature in the energy storage system at a temperature suitable for cell operation (i.e., a preset temperature).
The embodiment of the application also provides an electronic device, which comprises: a memory in which a computer program is stored, and a processor configured to execute the above control method of the temperature control system by the computer program.
The processor in the electronic device is configured to execute a program that performs the following functions: acquiring an operating parameter of the energy storage system, wherein the operating parameter comprises at least one of the following: operating current and operating power; determining an operating state of the energy storage system as a function of the operating parameter, wherein the operating state comprises at least one of: a charged state, a discharged state, and a stationary state; determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop; and controlling the start and stop of the cooling equipment according to the equipment start strategy.
It should be noted that, each module in the temperature control device of the energy storage system may be a program module (for example, a set of program instructions for implementing a specific function), or may be a hardware module, and for the latter, it may be represented by the following form, but is not limited thereto: the expression forms of the modules are all a processor, or the functions of the modules are realized by one processor.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be essentially or a part contributing to the related art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (10)
1. A method of controlling the temperature of an energy storage system, comprising:
acquiring an operating parameter of the energy storage system, wherein the operating parameter comprises at least one of the following: operating current and operating power;
determining an operating state of the energy storage system according to the operating parameter, wherein the operating state comprises at least one of the following: a charged state, a discharged state, and a stationary state;
determining a device start strategy corresponding to the operation state, wherein the device start strategy is used for indicating trigger conditions of cooling devices of the energy storage system in different operation states, and the trigger conditions are used for triggering the cooling devices to start or stop;
and controlling the start and stop of the cooling equipment according to the equipment start strategy.
2. The method of claim 1, wherein determining the operating state of the energy storage system based on the operating parameter comprises:
determining that the operating state of the energy storage system is the charging state or the discharging state under the condition that the operating parameter is larger than a preset value;
and under the condition that the operation parameter is equal to the preset value, determining the operation state of the energy storage system as the standing state.
3. The method of claim 1, wherein controlling the start-up and shut-down of the cooling device in accordance with the device start-up strategy comprises:
and when the operating state of the energy storage system is the charging state or the discharging state, starting the cooling equipment, wherein the cooling equipment comprises at least one of the following components: air cooling equipment and liquid cooling equipment;
and when the running state of the energy storage system is a standing state, acquiring a temperature value of the energy storage system, and controlling the cooling equipment according to the temperature value.
4. The method of claim 3, wherein the temperature value of the energy storage system comprises: the temperature value of air conditioner return air in the energy storage system and a plurality of temperature values of a plurality of electric cores in the energy storage system; controlling the cooling device in dependence on the temperature value, comprising:
controlling the cooling equipment and an electric heater in the energy storage system to be started simultaneously under the condition that the temperature value of the return air of the air conditioner is smaller than a first preset threshold value; or alternatively, the process may be performed,
and controlling the cooling equipment and the electric heater to be started simultaneously under the condition that the temperature value of any one of the plurality of electric cores is smaller than a second preset threshold value.
5. The method of claim 4, wherein when the electric heater is deactivated and the operating state of the energy storage system is the stationary state, the method further comprises:
acquiring temperatures of a plurality of battery cells in the energy storage system, obtaining a plurality of temperature values, and determining a highest temperature value and a lowest temperature value in the plurality of temperature values;
determining a difference between the maximum temperature value and the minimum temperature value as a temperature difference of the energy storage system;
and controlling the cooling equipment according to the temperature difference.
6. The method of claim 5, wherein controlling the cooling apparatus in accordance with the temperature differential comprises:
controlling the cooling equipment to continue to operate under the condition that the temperature difference is larger than a third preset threshold value;
and controlling the cooling equipment to stop running under the condition that the temperature difference is smaller than the third preset threshold value.
7. The method of claim 6, wherein the method further comprises:
monitoring a state of a compressor in the energy storage system if the temperature difference is equal to the third preset threshold;
and when the state of the compressor is monitored to be a starting state, controlling the cooling equipment to start simultaneously with the compressor.
8. A temperature control device for an energy storage system, comprising:
the system comprises an acquisition module for acquiring operation parameters of the energy storage system, wherein the operation parameters comprise at least one of the following: operating current and operating power;
a first determining module, configured to determine an operation state of the energy storage system according to the operation parameter, where the operation state includes at least one of: a charged state, a discharged state, and a stationary state;
the second determining module is used for determining an equipment starting strategy corresponding to the running state, wherein the equipment starting strategy is used for indicating triggering conditions of cooling equipment of the energy storage system in different running states, and the triggering conditions are used for triggering the cooling equipment to start or stop;
and the control module is used for controlling the start and stop of the cooling equipment according to the cooling equipment start strategy.
9. A non-volatile storage medium, wherein a computer program is stored in the non-volatile storage medium, and wherein a device in which the non-volatile storage medium is located executes the temperature control method of the energy storage system according to any one of claims 1 to 7 by running the computer program.
10. An energy storage temperature control system, comprising: cooling equipment, an electric heater, and a compressor;
the cooling equipment is used for reducing the temperature in the energy storage system to a preset temperature when the energy storage system is in a charging state or a discharging state;
the electric heater is used for increasing the temperature of the energy storage system to the preset temperature when the temperature value of any one of the energy storage modules (electric cores) in the plurality of energy storage modules (electric cores) is smaller than a fourth preset threshold value;
the compressor is used for maintaining the temperature of the energy storage system at the preset temperature when the energy storage system is in a non-heating state.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505136A (en) * | 2023-06-25 | 2023-07-28 | 宁德时代新能源科技股份有限公司 | Thermal management control method, device, equipment and storage medium |
| CN116914317A (en) * | 2023-08-10 | 2023-10-20 | 无锡柯诺威新能源科技有限公司 | Low-temperature starting method of energy storage thermal management system |
| CN117276749A (en) * | 2023-11-22 | 2023-12-22 | 江苏天合储能有限公司 | Temperature control method and device of energy storage system and electronic equipment |
| CN117393911A (en) * | 2023-12-11 | 2024-01-12 | 江苏天合储能有限公司 | Thermal management method for energy storage system, energy management system, energy storage system and medium |
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2023
- 2023-03-09 CN CN202310245852.6A patent/CN116130842A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505136A (en) * | 2023-06-25 | 2023-07-28 | 宁德时代新能源科技股份有限公司 | Thermal management control method, device, equipment and storage medium |
| CN116505136B (en) * | 2023-06-25 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Thermal management control method, device, equipment and storage medium |
| CN116914317A (en) * | 2023-08-10 | 2023-10-20 | 无锡柯诺威新能源科技有限公司 | Low-temperature starting method of energy storage thermal management system |
| CN117276749A (en) * | 2023-11-22 | 2023-12-22 | 江苏天合储能有限公司 | Temperature control method and device of energy storage system and electronic equipment |
| CN117276749B (en) * | 2023-11-22 | 2024-04-16 | 江苏天合储能有限公司 | Temperature control method and device of energy storage system and electronic equipment |
| CN117393911A (en) * | 2023-12-11 | 2024-01-12 | 江苏天合储能有限公司 | Thermal management method for energy storage system, energy management system, energy storage system and medium |
| CN117393911B (en) * | 2023-12-11 | 2024-04-16 | 江苏天合储能有限公司 | Thermal management method for energy storage system, energy management system, energy storage system and medium |
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