CN116780019B - Method for controlling temperature of battery cell of air-cooled energy-storage air conditioner - Google Patents
Method for controlling temperature of battery cell of air-cooled energy-storage air conditioner Download PDFInfo
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- CN116780019B CN116780019B CN202310731921.4A CN202310731921A CN116780019B CN 116780019 B CN116780019 B CN 116780019B CN 202310731921 A CN202310731921 A CN 202310731921A CN 116780019 B CN116780019 B CN 116780019B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004146 energy storage Methods 0.000 title claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 41
- 238000011217 control strategy Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 41
- 230000008569 process Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
-
- 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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a method for controlling the temperature of an electric core of an air-cooled energy-storage air conditioner, which comprises the following steps: 1) Refrigeration control: the battery core temperature control mode adopts different control strategies for different battery pack operation states; when the battery pack is in an operation state, namely, the battery pack is being charged or discharged, the control mode is as follows: when the maximum temperature of the battery cell is greater than or equal to the maximum temperature of the battery cell, the air conditioner enters a refrigerating state when the refrigerating set point of the battery cell temperature is increased by the refrigerating return difference of the battery cell temperature, and the battery pack is cooled, 2) heated and controlled, and 3) air supply is controlled. According to the method for controlling the temperature of the battery cell of the air-cooled energy-storage air conditioner, the battery cell temperature is introduced as a control variable, and compared with a traditional air-conditioner return air temperature control method, the method for controlling the temperature of the battery cell has the advantages of being more accurate in temperature control and lower in energy consumption of the air conditioner, the energy consumption of the air conditioner is maximum in the energy consumption proportion of an energy storage cabinet, and the control method can effectively reduce the energy consumption of the air conditioner and achieve the characteristic of energy conservation.
Description
Technical Field
The invention relates to the technical field of energy storage air conditioners, in particular to a method for controlling the temperature of an electric core of an air-cooled energy storage air conditioner.
Background
In the context of "two carbon" targets, energy storage services have grown vigorously. The battery pack of the energy storage device can be charged and discharged, natural power generation is stored when electricity is used in a valley, the electricity is fed back to the power grid when electricity is used in a peak, the defects of unstable and dispersed power generation of new energy sources such as photoelectric water and electricity are effectively overcome through cooperation with the power grid, and the peak regulation requirement of the power grid is met. Heat is generated in the charging and discharging processes of the battery pack, the battery pack is damaged due to overhigh temperature, the charging and discharging efficiency of the battery pack can be improved maximally in a specific temperature range, the heating value is reduced, the service life of the battery is prolonged, and therefore an energy storage air conditioner specially designed for energy storage equipment is generated.
The existing air-cooled energy-storage air conditioner still adopts a control method of return air temperature, but the existing control method of return air temperature has certain deviation on temperature control, and the energy consumption of the air conditioner cannot be effectively reduced, so a method for controlling the temperature of an electric core of the air-cooled energy-storage air conditioner is provided to solve the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for controlling the temperature of an air-cooled energy-storage air conditioner battery cell, which has the advantages of effectively reducing the energy consumption of the air conditioner, realizing energy conservation and the like, and solves the problems that the existing control method for the return air temperature has a certain deviation on temperature control and the energy consumption of the air conditioner cannot be effectively reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for controlling the temperature of an electric core of an air-cooled energy-storage air conditioner comprises the following steps:
1) Refrigeration control: the battery core temperature control mode adopts different control strategies for different battery pack operation states;
when the battery pack is in an operation state, namely, the battery pack is being charged or discharged, the control mode is as follows:
when the large temperature of the battery cell is greater than or equal to the battery cell temperature refrigeration set point and the battery cell temperature refrigeration return difference, the air conditioner enters a refrigeration state to cool the battery pack;
when the maximum temperature of the battery cell is less than or equal to the battery cell temperature refrigeration set point, the battery cell is in a state of air supply after being out of the refrigeration state, and the battery pack is not cooled any more;
when the battery pack is in a non-running state, namely the battery pack is neither charged nor discharged, the control mode is as follows:
when the maximum temperature of the battery cell is greater than or equal to the maximum temperature refrigerating set point of the battery cell, the refrigerating return difference of the battery cell temperature and the refrigerating return difference of the battery non-operation mode, the air conditioner enters a refrigerating state to cool the battery pack;
when the maximum temperature of the battery core is less than or equal to the battery core temperature refrigeration set point, the battery core is in a state of air-out and enters an air supply state, and the battery pack is not cooled any more;
tmax represents the maximum temperature of the battery cell, tcs represents the temperature refrigeration set point of the battery cell, tcd represents the temperature refrigeration return difference of the battery cell, and Tsd represents the refrigeration return difference of the non-operation state of the battery cell;
2) Heating control: unlike the cooling control, the heating control no longer distinguishes whether the battery is in an operating state;
in the battery cell temperature control mode, the heating control mode is as follows: when the minimum temperature of the battery cell is less than or equal to the temperature heating set point of the battery cell and the temperature heating return difference of the battery cell is reduced, the air conditioner enters a heating state to heat the battery pack;
when the temperature of the battery cell is greater than or equal to a heating set point of the temperature of the battery cell, the battery pack is in an air supply state and is not heated any more;
tmin represents the minimum temperature of the battery cell, ths represents the temperature heating set point of the battery cell, and Thd represents the temperature heating return difference of the battery cell;
when the battery pack is in an operating state, a large amount of heat is generated, which is also a main reason that the energy storage container needs an air conditioner to provide refrigeration, and when the battery needs to be heated, the battery is often in a non-operating state;
3) And (3) air supply control: the air conditioner is in an air supply state when no refrigeration and no heating are required, and the air supply device is started to keep air circulation.
Further, the air conditioner needs to obtain the following parameters from the BMS host computer:
1) Maximum temperature of the battery cell. The maximum temperature of the battery core is used for refrigeration control, and the refrigeration requirement is calculated;
2) And the minimum temperature of the battery cell. The minimum temperature of the battery core is used for heating control, and heating requirements are calculated;
3) Average cell temperature. The average temperature of the battery core is used for auxiliary control, and auxiliary calibration is carried out on refrigerating and heating of the air conditioner;
4) Pool operating conditions. The battery core releases heat in the charging and discharging processes, so that different control strategies are adopted in the battery running state and the battery non-running state.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
according to the method for controlling the temperature of the battery cell of the air-cooled energy-storage air conditioner, the temperature of the battery cell is introduced as a control variable. Compared with the traditional air conditioner return air temperature control method, the battery core temperature control method has the advantages of being more accurate in temperature control and lower in air conditioner energy consumption. The air conditioner energy consumption is the largest in the energy storage cabinet energy consumption duty ratio, and the control method can effectively reduce the air conditioner energy consumption and realize the characteristic of energy saving.
Drawings
FIG. 1 is a schematic diagram of a refrigeration control architecture according to the present invention;
FIG. 2 is a schematic view of a heating control structure according to the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a method for controlling the temperature of an air-cooled energy-storage air conditioner battery cell in this embodiment includes the following steps:
1) Refrigeration control: the battery core temperature control mode adopts different control strategies for different battery pack operation states;
when the battery pack is in an operation state, namely, the battery pack is being charged or discharged, the control mode is as follows:
when the large temperature of the battery cell is greater than or equal to the battery cell temperature refrigeration set point and the battery cell temperature refrigeration return difference, the air conditioner enters a refrigeration state to cool the battery pack;
when the maximum temperature of the battery cell is less than or equal to the battery cell temperature refrigeration set point, the battery cell is in a state of air supply after being out of the refrigeration state, and the battery pack is not cooled any more;
when the battery pack is in a non-running state, namely the battery pack is neither charged nor discharged, the control mode is as follows:
when the maximum temperature of the battery cell is greater than or equal to the maximum temperature refrigerating set point of the battery cell, the refrigerating return difference of the battery cell temperature and the refrigerating return difference of the battery non-operation mode, the air conditioner enters a refrigerating state to cool the battery pack;
when the maximum temperature of the battery core is less than or equal to the battery core temperature refrigeration set point, the battery core is in a state of air-out and enters an air supply state, and the battery pack is not cooled any more;
according to the step 1), tmax represents the maximum temperature of the battery cell, tcs represents the refrigerating set point of the temperature of the battery cell, tcd represents the refrigerating return difference of the temperature of the battery cell, and Tsd represents the refrigerating return difference of the non-operating state of the battery cell.
2) Heating control: unlike the cooling control, the heating control no longer distinguishes whether the battery is in an operating state;
in the battery cell temperature control mode, the heating control mode is as follows: when the minimum temperature of the battery cell is less than or equal to the temperature heating set point of the battery cell and the temperature heating return difference of the battery cell is reduced, the air conditioner enters a heating state to heat the battery pack;
when the temperature of the battery cell is greater than or equal to a heating set point of the temperature of the battery cell, the battery pack is in an air supply state and is not heated any more;
tmin represents the minimum cell temperature, ths represents the cell temperature heating set point, thd represents the cell temperature heating return difference according to step 2).
3) And (3) air supply control: the air conditioner is in an air supply state when no refrigeration and no heating are required, and the air supply device is started to keep air circulation.
The battery pack according to step 2) generates a large amount of heat when in an operating state, which is also a main reason why the energy storage container needs an air conditioner to provide refrigeration, and when the battery needs to be heated, the battery is often in a non-operating state.
The air conditioner needs to obtain the following parameters from the BMS upper computer:
1) Maximum temperature of the battery cell. The maximum temperature of the battery core is used for refrigeration control, and the refrigeration requirement is calculated;
2) And the minimum temperature of the battery cell. The minimum temperature of the battery core is used for heating control, and heating requirements are calculated;
3) Average cell temperature. The average temperature of the battery core is used for auxiliary control, and auxiliary calibration is carried out on refrigerating and heating of the air conditioner;
4) Pool operating conditions. The battery core releases heat in the charging and discharging processes, so that different control strategies are adopted in the battery running state and the battery non-running state.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The method for controlling the temperature of the battery cell of the air-cooled energy-storage air conditioner is characterized by comprising the following steps of:
1) Refrigeration control: the battery core temperature control mode adopts different control strategies for different battery pack operation states;
when the battery pack is in an operation state, namely, the battery pack is being charged or discharged, the control mode is as follows:
when the large temperature of the battery cell is greater than or equal to the battery cell temperature refrigeration set point and the battery cell temperature refrigeration return difference, the air conditioner enters a refrigeration state to cool the battery pack;
when the maximum temperature of the battery cell is less than or equal to the battery cell temperature refrigeration set point, the battery cell is in a state of air supply after being out of the refrigeration state, and the battery pack is not cooled any more;
when the battery pack is in a non-running state, namely the battery pack is neither charged nor discharged, the control mode is as follows:
when the maximum temperature of the battery cell is greater than or equal to the maximum temperature refrigerating set point of the battery cell, the refrigerating return difference of the battery cell temperature and the refrigerating return difference of the battery non-operation mode, the air conditioner enters a refrigerating state to cool the battery pack;
when the maximum temperature of the battery core is less than or equal to the battery core temperature refrigeration set point, the battery core is in a state of air-out and enters an air supply state, and the battery pack is not cooled any more;
tmax represents the maximum temperature of the battery cell, tcs represents the temperature refrigeration set point of the battery cell, tcd represents the temperature refrigeration return difference of the battery cell, and Tsd represents the refrigeration return difference of the non-operation state of the battery cell;
2) Heating control: unlike the cooling control, the heating control no longer distinguishes whether the battery is in an operating state;
in the battery cell temperature control mode, the heating control mode is as follows: when the minimum temperature of the battery cell is less than or equal to the temperature heating set point of the battery cell and the temperature heating return difference of the battery cell is reduced, the air conditioner enters a heating state to heat the battery pack;
when the temperature of the battery cell is greater than or equal to a heating set point of the temperature of the battery cell, the battery pack is in an air supply state and is not heated any more;
tmin represents the minimum temperature of the battery cell, ths represents the temperature heating set point of the battery cell, and Thd represents the temperature heating return difference of the battery cell;
when the battery pack is in an operating state, a large amount of heat is generated, which is also a main reason that the energy storage container needs an air conditioner to provide refrigeration, and when the battery needs to be heated, the battery is often in a non-operating state;
3) And (3) air supply control: the air conditioner is in an air supply state when no refrigeration and no heating are required, and the air supply device is started to keep air circulation.
2. The method for controlling the temperature of the battery cell of the air-cooled energy-storage air conditioner according to claim 1, wherein the method comprises the following steps: the air conditioner needs to obtain the following parameters from the BMS upper computer:
1) Maximum temperature of the battery core; the maximum temperature of the battery core is used for refrigeration control, and the refrigeration requirement is calculated;
2) Minimum temperature of the battery cell; the minimum temperature of the battery core is used for heating control, and heating requirements are calculated;
3) Average temperature of the battery core; the average temperature of the battery core is used for auxiliary control, and auxiliary calibration is carried out on refrigerating and heating of the air conditioner;
4) A battery operating state; the battery core releases heat in the charging and discharging processes, so that different control strategies are adopted in the battery running state and the battery non-running state.
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| CN202310731921.4A CN116780019B (en) | 2023-06-20 | 2023-06-20 | Method for controlling temperature of battery cell of air-cooled energy-storage air conditioner |
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| 动力电池组风冷空调系统研究;赵德华;张中卿;王博;胡义凯;靳曲;;汽车实用技术;20180115(01);全文 * |
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