CN118412589B - Water cooling unit control method and energy storage system - Google Patents
Water cooling unit control method and energy storage system Download PDFInfo
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- CN118412589B CN118412589B CN202410875570.9A CN202410875570A CN118412589B CN 118412589 B CN118412589 B CN 118412589B CN 202410875570 A CN202410875570 A CN 202410875570A CN 118412589 B CN118412589 B CN 118412589B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 328
- 238000001816 cooling Methods 0.000 title claims abstract description 227
- 238000004146 energy storage Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005057 refrigeration Methods 0.000 claims abstract description 7
- 239000000498 cooling water Substances 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 12
- 239000000110 cooling liquid Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000000352 storage cell Anatomy 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
-
- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
-
- 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
-
- 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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The application provides a water cooling unit control method and an energy storage system, wherein the method comprises the steps of obtaining a first ambient temperature of an environment where a water cooling unit is located after the water cooling unit is started for refrigeration, obtaining first pressure data of an exhaust port of a compressor of the water cooling unit if the first ambient temperature is greater than a first temperature threshold value, operating a fan of the water cooling unit at a first operating frequency if the first pressure data is greater than the first pressure threshold value, wherein the first operating frequency is greater than 80% of the maximum operating frequency of the fan, obtaining second pressure data of the exhaust port of the compressor of the water cooling unit after the fan is operated at the first operating frequency for a specified period, and controlling the water cooling unit to stop and outputting a fault alarm signal if the second pressure data is greater than the first pressure threshold value. By the method, the operation safety of the water cooling unit can be improved.
Description
Technical Field
The application relates to the technical field of energy storage system control, in particular to a water cooling unit control method and an energy storage system.
Background
Energy storage systems may suffer from performance degradation if used in environments with lower or higher temperatures. The current use of the energy storage system may ignore the influence of the ambient temperature on the energy storage system and the water cooling system for performing thermal management on the energy storage system, which may cause the situation that the water cooling system running the energy storage system may have an over-temperature or over-cold environment to affect the safety of the water cooling system.
Disclosure of Invention
The application aims to provide a water-cooling unit control method and an energy storage system, which can improve the operation safety of the water-cooling unit of the energy storage system.
The invention provides a control method of a water cooling unit, which comprises the steps of obtaining a first environmental temperature of an environment where the water cooling unit is located after the water cooling unit is started to refrigerate, obtaining first pressure data of an exhaust port of a compressor of the water cooling unit if the first environmental temperature is larger than a first temperature threshold value, operating a fan of the water cooling unit at a first operating frequency if the first pressure data is larger than the first pressure threshold value, wherein the first operating frequency is larger than 80% of the maximum operating frequency of the fan, obtaining second pressure data of the exhaust port of the compressor of the water cooling unit after the fan is operated for a specified duration at the first operating frequency, and controlling the water cooling unit to stop and outputting a fault alarm signal if the second pressure data is larger than the first pressure threshold value.
In the above embodiment, the operation of the water-cooling unit can be matched based on the identification of the temperature and the pressure of the exhaust port of the compressor, so that the operation of the energy storage system can be suitable for the current temperature and pressure conditions, and the operation of the water-cooling unit and the energy storage system can be safer. The fan can be operated at a larger operation frequency, so that rapid cooling can be realized, the energy storage system can be operated in a safe environment, and the operation safety of the water cooling unit and the energy storage system is improved. If the pressure of the exhaust port of the compressor is not the super threshold value caused by the influence of the ambient temperature under the cooling effect of the fan, the operation safety of the compressor can be improved by alarming and stopping for the safety of the compressor.
In an optional implementation mode, the method further comprises the steps of obtaining third pressure data of an exhaust port of a compressor of the water-cooling unit after the fan runs for a specified duration at the first running frequency, and outputting an abnormality alarm signal if the third pressure data is not greater than the first pressure threshold.
In the above implementation manner, if the pressure of the exhaust port of the compressor has been reduced under the cooling effect of the fan, it may be indicated that the pressure of the exhaust port of the compressor is due to the super-threshold value caused by the influence of the ambient temperature, so that the normal pressure may be recovered after the ambient temperature is reduced, and therefore only an alarm signal may be output to indicate that the temperature is abnormal, and the water-cooling unit may continue to operate.
In an alternative embodiment, the method further comprises determining a required operating frequency of a fan of the water-cooling unit based on the third pressure data and controlling the fan to operate at the required operating frequency if the third pressure data is not greater than the first pressure threshold, obtaining a water outlet temperature of the water-cooling unit, and controlling the operating frequency of the compressor based on the water outlet temperature.
In the implementation manner, since various parameters of the water cooling unit of the energy storage system are normal, thermal management can be realized based on actual environment temperature, pressure data of the compressor and thermal management requirements of the energy storage battery.
In an alternative embodiment, the method further comprises outputting an alarm signal if the first ambient temperature is less than a second temperature threshold.
In the above implementation, if the energy storage system is in a relatively low temperature environment, indicating that the energy storage system is not safe in operation, an alarm may be output for prompting.
In an alternative implementation mode, the output of the alarm signal comprises the steps of obtaining fourth pressure data of an air suction port of the compressor, and controlling the water cooling unit to stop and outputting a fault alarm signal if the fourth pressure data is smaller than a second pressure threshold value.
In the above embodiment, when the ambient temperature is low, the pressure of the intake port of the compressor may be further determined, and if the pressure of the intake port of the compressor is too low, there is a possibility that the intake amount of the compressor is reduced, and the compressor may be damaged due to poor heat dissipation and lubrication failure. Therefore, the water cooling system can be stopped under the condition, and an alarm signal is output, so that the operation safety of the water cooling unit is improved.
In an alternative implementation mode, the outputting the alarm signal comprises obtaining fifth pressure data of the air suction port of the compressor, and outputting the alarm signal if the fifth pressure data is not smaller than a second pressure threshold value.
In the above embodiment, when the ambient temperature is low, the pressure of the air inlet of the compressor can be further determined, and if the pressure of the air inlet of the compressor is normal, the compressor can normally operate to dissipate heat, so that only an alarm signal for prompting can be output, a warning effect can be also achieved, and the operation safety of the water cooling unit can be improved.
In an alternative embodiment, the water cooling unit provides a thermal management function for the energy storage battery, and the method further comprises controlling a fan of the water cooling unit and a compressor of the water cooling unit to operate according to the thermal management requirement of the energy storage battery if the first ambient temperature is within the limited interval.
In an alternative embodiment, the control of the fan of the water cooling unit and the compressor of the water cooling unit operates according to the refrigeration requirement of the battery cluster includes obtaining a temperature difference between cooling water of a water supply loop of the water cooling unit at a water inlet of the energy storage battery and cooling water of a water supply loop of the water cooling unit at a water outlet of the energy storage battery, and dynamically controlling operation of the fan of the water cooling unit and the compressor of the water cooling unit according to the temperature difference.
In the implementation manner, when the ambient temperature meets the operation requirement of the energy storage system, the energy storage system can be operated based on the actual refrigeration or heating requirement of the battery cluster so as to provide the required refrigeration and heating for the energy storage battery, thereby improving the working safety of the energy storage battery.
The invention provides an energy storage system, which comprises an energy storage battery, a water cooling unit, a first temperature sensor, a first detector and a water cooling unit, wherein the water cooling unit is used for providing heat management for the energy storage battery, the first temperature sensor is arranged on the water cooling unit and used for detecting the ambient temperature in the environment where the water cooling unit is located, the first detector is arranged at an exhaust port of a compressor of the water cooling unit and used for detecting pressure data of the exhaust port of the compressor, and the water cooling unit is used for executing the steps in the water cooling unit control method based on the ambient temperature acquired by the first temperature sensor and the pressure data acquired by the first detector.
In an alternative embodiment, the air-cooling system further comprises a second detector which is arranged at the air suction port of the compressor of the water-cooling unit and used for detecting pressure data of the air suction port of the compressor, and the water-cooling unit is further used for operating based on the pressure data acquired by the second detector.
In an alternative embodiment, the water cooling unit further comprises a third detector, a fourth detector and a water cooling unit, wherein the third detector is arranged on a water supply loop of the water cooling unit and is used for collecting temperature data of a water inlet of the energy storage battery, the fourth detector is arranged on the water supply loop and is used for collecting temperature data of a water outlet of the energy storage battery, and the water cooling unit is further used for operating based on the temperature data collected by the third detector and the temperature data collected by the fourth detector.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an energy storage system according to an embodiment of the present application;
FIG. 2 is a flow chart of a water chiller control method according to an embodiment of the present application;
FIG. 3 is another flow chart of a water chiller control method according to an embodiment of the present application;
FIG. 4 is a flowchart of a water chiller control method according to an embodiment of the present application;
fig. 5 is a flowchart of a water chiller control method according to an embodiment of the present application.
The icons are 100-water cooling units, 110-first temperature sensors, 121-first detectors, 122-second detectors, 123-third detectors, 124-fourth detectors, 130-compressors, 140-condensers, 141-fans, 150-reservoirs, 160-throttle valves, 170-heat exchangers, 180-heaters, 190-expansion tanks, 191-vapor-liquid separators, 192-water pumps, 200-energy storage batteries, 210-battery clusters, and 220-second temperature sensors.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
The energy storage system is used for supplying power, and along with the progress of supplying power, the battery in the energy storage system can generate heat, and the long-time state that is in too high temperature can influence the life-span of battery, also can have some potential safety hazards. Therefore, in the practical use of the energy storage system, the battery needs to be subjected to a cooling process. In some low temperature environments, for example, when the outdoor temperature is below zero, in order to enable the energy storage system to supply power more stably, it is necessary to supply power after the battery of the energy storage system returns to its temperature. Based on this, a water cooling system is generally configured in the energy storage system for performing a cooling and heating process for each battery.
The existing energy storage system pays more attention to the safety of each battery in the energy storage system, and the operation safety of the water cooling system is ignored.
Based on the current situation, the application provides a water-cooling unit control method and an energy storage system, and the operation safety of the water-cooling unit can be improved by detecting the environment of the water-cooling unit and controlling the operation of the water-cooling unit based on the detected parameters, so that the operation safety of the whole energy storage system can be further improved.
For the convenience of understanding the present embodiment, an operation environment for executing a water-cooling unit control method disclosed in the embodiment of the present application will be described first.
The energy storage system provided by the embodiment of the application comprises an energy storage battery 200, a water cooling unit 100, a first temperature sensor 110 and a first detector 121.
The energy storage battery 200 may include a battery cluster 210. Illustratively, the energy storage battery 200 may include a plurality of battery clusters 210. Each battery cluster 210 may include one or more battery modules. Each battery module may include one or more battery cells.
The battery modules included in the battery cluster 210 may be connected in series, the battery modules included in the battery cluster 210 may be connected in parallel, and the battery modules included in the battery cluster 210 may be connected in series.
The water cooling unit 100 is used for providing heat management for the energy storage battery 200.
Optionally, the energy storage battery 200 is connected to the water chiller 100. The energy storage battery 200 and the water cooling unit 100 can be associated through a water supply circuit.
Alternatively, the energy storage battery 200 may be provided with a cold water plate, which may be connected to the water chiller 100. The cold water plate may be connected to the water chiller 100 through a water supply circuit. The water chiller 100 may provide cooling water to the cold water plate, which may be in contact with each of the energy storage cells 200 for thermal management.
One cold water plate may be provided for each of the battery clusters 210 for thermal management of the battery clusters 210, or one cold water plate may be commonly used for a plurality of the battery clusters 210 for thermal management of the plurality of the battery clusters 210.
The energy storage system may further include a Battery MANAGEMENT SYSTEM (BMS for short), and the water cooling unit 100 may further include a water cooling controller, and the Battery management system may be communicatively connected to the water cooling controller.
The first temperature sensor 110 may be installed on the water chiller 100 to detect an ambient temperature in an environment in which the water chiller 100 is located. For example, the first temperature sensor 110 may be installed at a location where the ambient temperature can be obtained in the water chiller 100. For example, the first temperature sensor 110 may be installed on an outer surface of any equipment in the water-cooling unit 100, and then the temperature in the air of the outer surface of any equipment may be taken as the ambient temperature.
Optionally, the water-cooling unit 100 may include a fan 141, and the first temperature sensor 110 may be installed at an air inlet of the fan 141 of the water-cooling system, where the air inlet temperature may be an ambient temperature of an environment where the water-cooling unit 100 is located, or may be an ambient temperature of the environment where the water-cooling unit 100 is located.
The first detector 121 may be installed at the discharge port of the compressor 130 of the water chiller 100 for detecting pressure data of the discharge port of the compressor 130. Alternatively, the first detector 121 may be a two-in-one sensor for detecting the temperature and pressure of the discharge port of the compressor 130.
The discharge port of the compressor 130 may also be mounted with a first temperature sensor 110 for detecting the discharge port of the compressor 130.
In this embodiment, the water-cooling unit 100 is configured to operate based on the ambient temperature acquired by the first temperature sensor 110 and the pressure data acquired by the first detector 121.
The water-cooling unit 100 may further include a water-cooling controller that may control the operation of various components in the water-cooling unit 100 based on the ambient temperature acquired by the first temperature sensor 110 and the pressure data acquired by the first detector 121.
In this embodiment, the energy storage battery 200 may include a plurality of battery clusters 210, and four battery clusters 210, namely, a first cluster, a second cluster, a third cluster, and a fourth cluster, are shown in the example shown in fig. 1. Of course, in actual use, the energy storage cell 200 may include more or fewer clusters 210. For example, more clusters 210 may be provided where a greater capacity of the energy storage battery 200 is desired, and fewer clusters 210 may be provided where a relatively lesser capacity of the energy storage battery 200 is desired.
Optionally, a second temperature sensor 220 may be further installed on the battery cluster 210 to detect the temperature of the battery cluster 210.
Optionally, as shown in FIG. 1, the energy storage system may further include a second detector 122 installed at the suction port of the compressor 130 of the water chiller 100 for detecting pressure data of the suction port of the compressor 130.
A second detector 122 may be further installed at the suction port of the compressor 130 of the water cooling unit 100 to detect the temperature of the suction port of the compressor 130. Alternatively, the second detector 122 may be a two-in-one sensor for detecting the temperature and pressure of the suction port of the compressor 130.
In this embodiment, the water chiller 100 is further configured to operate based on the pressure data acquired by the second detector 122. For example, the water cooling controller of the water cooling unit 100 may obtain pressure data collected by the second detector 122 and then control the operation of the various components in the water cooling unit 100 based on the pressure sensor.
The energy storage system of this embodiment may further include a third detector 123 and a fourth detector 124. The third detector 123 may be installed in the water supply circuit of the water chiller 100 to collect temperature data of the cooling water of the water supply circuit at the entrance of the battery cluster 210, that is, temperature data of the water inlet of the energy storage battery 200. The water inlet may be a water inlet of one battery cluster 210 of the energy storage battery, or may be a uniform water inlet integrally provided with a plurality of battery clusters 210 included in the energy storage battery 200.
Alternatively, the third detector 123 may be installed at a position near the water inlet of the battery cluster 210 in the water supply circuit.
The fourth detector 124 may be installed in the water supply circuit of the water chiller 100 to collect temperature data of the cooling water flowing into the water supply circuit from the battery cluster 210, that is, temperature data of the water outlet of the energy storage battery 200.
The water outlet may be a water outlet of one battery cluster 210 of the energy storage battery, or may be a uniform water outlet integrally provided with a plurality of battery clusters 210 included in the energy storage battery 200.
Alternatively, the fourth detector 124 may be mounted in the water supply circuit near the water outlet of the battery cluster 210.
The water chiller 100 is also configured to operate based on temperature data acquired by the third detector 123 and temperature data acquired by the fourth detector 124.
Illustratively, the water cooling controller of the water cooling unit 100 may obtain temperature data collected by the third detector 123 and the fourth detector 124, so that the operation of each component in the water cooling unit 100 may be controlled based on the temperature difference determined by the temperature data.
By way of example, the temperature difference between the outlet water temperature and the return water temperature of the water-cooling unit 100 can be determined according to the temperature data of the water inlet detected by the third detector 123 and the temperature data of the water outlet detected by the fourth detector 124, and if the temperature difference is smaller, the heat exchange effect can be poor, and if the temperature difference is larger, the heat exchange effect can be good.
For example, the outlet water temperature of the water chiller 100 may represent the temperature of the water supply circuit to which the water chiller 100 is connected at a location proximate to the energy storage battery 200. For example, the energy storage battery 200 is provided with a water inlet for connecting with a water supply circuit, and the temperature of the water supply circuit at the water inlet connected with the energy storage battery 200 represents the water outlet temperature of the water cooling unit 100. The return water temperature of the water chiller 100 may represent the temperature of the water supply circuit to which the water chiller 100 is connected at a location proximate to the energy storage battery 200. For example, the energy storage battery 200 is provided with a water outlet for connecting with a water supply circuit and recovering cooling water into the water supply circuit, and the temperature of the water supply circuit at the water outlet connected with the energy storage battery 200 represents the return water temperature of the water cooling unit 100.
Therefore, when the heat exchanging effect is poor, the working force of the water cooling unit 100 can be improved to enhance the heat exchanging effect.
The energy storage system of this embodiment may further include a first pressure sensor and a second pressure sensor. The first pressure sensor may be installed in the water supply circuit of the water cooling unit 100 for collecting pressure data of the cooling water of the water supply circuit entering the battery cluster 210 side. The first pressure sensor may be installed at a position near the water inlet of the battery cluster 210 in the water supply circuit, for example.
The second pressure sensor may be installed in a water supply circuit of the water cooling unit 100 for collecting pressure data of the cooling water flowing into the water supply circuit from the battery cluster 210 side. The first pressure sensor may be mounted in the water supply circuit near the water outlet of the battery cluster 210, for example.
The water-cooling unit 100 is further configured to operate based on the pressure data acquired by the first pressure sensor and the pressure data acquired by the second pressure sensor.
For example, the water cooling controller of the water cooling unit 100 may obtain pressure data collected by the first pressure sensor and the second pressure sensor, so that the operation of each component in the water cooling unit 100 may be controlled based on the pressure difference determined by the pressure data.
By way of example, the pressure difference between the outlet water pressure and the return water pressure of the water-cooling unit 100 can be determined by the pressure data of the water inlet detected by the first pressure sensor and the pressure data of the water outlet detected by the second pressure sensor, and if the pressure difference is smaller, the water flow can be indicated to be large, and if the pressure difference is larger, the water flow can be indicated to be small. The smaller water flow may further determine whether there is a blockage in the water circuit inside the energy storage battery cluster 210.
Alternatively, the third detector 123 and the first pressure sensor may be two independent sensors for detecting temperature and pressure data, respectively. Alternatively, the third detector 123 and the first pressure sensor may be two-in-one sensors, and temperature data and pressure data may be detected.
Alternatively, the fourth detector 124 and the second pressure sensor may be two separate sensors for detecting temperature and pressure data, respectively. Alternatively, the fourth detector 124 and the second pressure sensor may be two-in-one sensors, and temperature data and pressure data detection may be implemented.
As shown in fig. 1, the water-cooling unit 100 may further include a compressor 130, a condenser 140, a liquid reservoir 150, a throttle valve 160, a heat exchanger 170, a heater 180, an expansion tank 190, a vapor-liquid separator 191, and a water pump 192.
The compressor 130 is connected to a condenser 140, the condenser 140 is connected to a reservoir 150, the reservoir 150 is connected to a throttle valve 160, and the throttle valve 160 is connected to a heat exchanger 170. The heat exchanger 170 may be further connected to a vapor-liquid separator 191, and the vapor-liquid separator 191 may be further connected to the compressor 130 to form a circulation path.
The heat exchanger 170 is connected to one end of the water pump 192, and the other end of the water pump 192 is connected to a water supply pipe of the water supply circuit, which is connected to a water inlet of the battery pack 210. The water outlet of the battery cluster 210 is in turn connected to a return line of the water supply circuit, which is in turn connected to the heater 180 and the expansion tank 190.
Illustratively, the energy storage system may further include a cold water plate in contact with the battery cluster 210. The heat exchanger 170 is connected to one end of the water pump 192, and the other end of the water pump 192 is connected to a water supply pipe of the water supply circuit, which is connected to a water inlet of the cold water plate in contact with the battery pack 210. The water outlet of the cold water plate contacted by the battery cluster 210 is again connected to the return pipe of the water supply circuit, which is again connected to the heater 180 and the expansion tank 190. In this example, the third detector 123 may be installed at a position near the water inlet of the cold water plate in the water supply circuit. The fourth detector 124 may be mounted in the water supply circuit near the water outlet of the cold water plate.
Alternatively, the heater 180 may be a PTC heater. Alternatively, the heat exchanger 170 may be a plate heat exchanger, simply referred to as a plate heat exchanger.
The principles of operation of the water chiller 100 are described below in connection with equipment that the water chiller 100 may include.
When the water cooling unit 100 is operated, the high-temperature and high-pressure gas refrigerant discharged from the compressor 130 of the water cooling unit 100 is changed into a medium-temperature and high-pressure supercooled liquid refrigerant through the condenser 140, and the heat of the refrigerant is dissipated to the environment through the condenser 140 and the fan 141. The first temperature sensor 110 may be disposed at an air inlet of the fan 141, the air inlet temperature may represent an ambient temperature, the temperature of the air increases after passing through the condenser 140 and the fan 141, and the air outlet temperature increases. The refrigerant is stored in the accumulator 150, enters the throttle valve 160, becomes a low-temperature low-pressure two-phase flow refrigerant, then enters the plate-change evaporation heat absorption device, exchanges heat with the high-temperature cooling liquid returned from the energy storage battery 200, becomes a low-temperature low-pressure superheated gas, and enters the compressor 130 for recirculation after passing through the vapor-liquid separator 191. Wherein a second detector 122 provided on the suction pipe of the compressor 130 may be used to collect suction pressure. The second detector 122 provided in the intake pipe may be a sensor capable of detecting both pressure and temperature, and may be used to detect the temperature of the intake pipe of the compressor 130. And the cooling liquid of which the cooling liquid loop is subjected to plate exchange cooling enters the corresponding battery through the two-way sealing valve of each battery through each water pump 192 to absorb heat, the heat of the battery in the battery is taken out, and the cooling liquid with high temperature enters the plate again to release heat. When the battery in the energy storage battery 200 needs to be heated, the temperature of the cooling liquid is increased after the cooling liquid is heated by the PTC heater 180, the high-temperature cooling liquid enters the battery to release heat, the temperature of the cooling liquid is reduced after the cooling liquid releases heat, and the cooling liquid enters the PTC heater 180 again to be heated for secondary circulation, and at the moment, the refrigerant circuit components such as the compressor 130 and the like do not operate. A return connected expansion tank 190 may be used to hold excess coolant. And temperature and pressure sensors respectively arranged on the water supply loop and the water inlet and the water outlet of the energy storage battery 200 are used for detecting the pressure and the temperature of the water inlet and the water outlet.
In order to reduce the number of components mounted on the water cooling system, the second detector 122 mounted on the suction port of the compressor 130 may be a sensor integrating pressure detection and temperature detection.
By arranging the detection devices for detecting the temperature or the pressure at each position in the water-cooling unit 100, the water-cooling controller can operate adaptively based on the data detected by each detection device, each device of the water-cooling unit 100 can operate under the condition that the pressure and the temperature are suitable, the operation safety of the water-cooling unit 100 is improved, and the operation safety of the energy storage system can be further improved.
Referring to fig. 2, a flow chart of a water chiller control method according to an embodiment of the present application is shown. The water-cooling unit control method provided by the embodiment of the application can be applied to a water-cooling unit, and the water-cooling unit can comprise a water-cooling controller for executing steps in the water-cooling unit control method. The specific flow shown in fig. 2 will be described in detail.
And step 310, after the water cooling unit starts refrigeration, acquiring a first environment temperature of the environment where the water cooling unit is located.
For example, the lower temperature limit may be determined based on the withstand conditions of the water chiller. For example, the lower the value of the lower temperature limit is for a water-cooled plant with a higher cold resistance, and the higher the value of the lower temperature limit is for a water-cooled plant with a lower cold resistance. The lower temperature limit may be, for example, from-30 ℃ to-50 ℃, for example, the lower temperature limit may be set to a temperature of-40 ℃, 30 ℃, 35 ℃, 50 ℃, or the like.
For example, the first temperature sensor for collecting the environment where the water cooling unit is located may collect temperature data according to a set time rule. For example, the temperature data collected by the first temperature sensor may be stored in a memory to which the first temperature sensor is connected, and the temperature data may be obtained from the memory when needed.
Optionally, after the first temperature data is obtained, it may be determined whether the first temperature data is lower than a lower temperature limit, and if not, the water pump of the water cooling unit is started again. The following steps 320 to 330 are performed. If the first ambient temperature is greater than the first temperature threshold, step 320 is performed.
At step 320, first pressure data for a discharge port of a compressor of a water chiller is obtained.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the first pressure data, the water-cooled controller obtaining the first pressure data from the first detector when the first pressure data is desired to be used.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the first pressure data, and the first detector may transmit the pressure data detected by the first detector to the water-cooled controller in real time. And after the first environment temperature is determined to be greater than a first temperature threshold value, acquiring pressure data transmitted by the first detector in real time as the first pressure data.
Alternatively, the first detector may collect and store pressure data of the exhaust port of the compressor according to a set time rule. For example, the first detector may be coupled to a memory in which the collected pressure data is stored in real time. When the first pressure data is needed to be used, the water cooling controller screens the first pressure data from the pressure data stored in the memory. For example, the pressure data detected by the first detector may be screened out and the pressure data detected after determining that the first ambient temperature is greater than the first temperature threshold.
Optionally, after the first ambient temperature is greater than the first temperature threshold and it is determined that the water pump of the water chiller 100 is started, the first pressure data is obtained.
The first temperature threshold may be, for example, 55 ℃, 60 ℃, 50 ℃, etc.
Optionally, if the first pressure data is not within the safe pressure interval, the components of the water cooling unit may be started to cool the temperature of the environment where the water cooling unit is located, so as to adjust the operation environment of the water cooling unit, so as to improve the operation safety of the water cooling unit. If the first pressure data is greater than the first pressure threshold, step 330 is performed.
The first pressure threshold may represent an upper pressure limit for safe operation of the compressor, where damage may occur when the pressure at the discharge of the compressor exceeds the first pressure threshold, and safe operation may occur when the pressure at the discharge of the compressor does not exceed the first pressure threshold.
The first pressure threshold may be calibrated based on an actual operating capacity of the compressor. For each type of compressor, for example, the pressure data of its discharge opening can be recorded during its safe operation, and the upper pressure limit during safe operation can be selected as the first pressure threshold.
Step 330, operating at a first operating frequency of a fan of the water chiller.
The first operating frequency may be a relatively large operating frequency, for example, the first operating frequency may be greater than 80% of the maximum operating frequency of the fan.
Consider that in actual use, if the ambient temperature is high, there may be a situation where the pressure at the discharge port of the compressor is virtually high, for example, where the pressure at the discharge port of the compressor is virtually high, the pressure at the discharge port of the compressor may drop, under the control of the heat exchanger and the fan, i.e. not more than the set upper pressure limit. By controlling the first operating frequency of the fan in the step 330, the cooling treatment of the ambient temperature can be implemented, so as to improve the environment where the water cooling unit is located.
For example, the first operating frequency of the fans of the water-cooled units of the different energy storage systems may be different, e.g., as the maximum operating frequency of the different fans is different. The maximum operating frequency may be a maximum operating frequency calibrated based on the actual operating capacity of the blower.
Alternatively, the first pressure data is within the safe pressure interval, and operation of the water chiller may be controlled based on actual thermal management requirements of the energy storage battery.
The safe pressure interval may be a range in which the compressor can safely operate. Illustratively, the compressor operates at a maximum pressure of B' kpa, which may damage the compressor if the pressure of the discharge port exceeds the maximum pressure when the compressor is operating. Thus, the normal range may be a range less than the B' kpa. Illustratively, the compressor operating maximum pressure is Bkpa, then the normal range may be a range less than the Bkpa, and the B is a value less than B'.
The water cooling unit can obtain the water outlet temperature of the water cooling unit, and the operation of the water cooling unit is controlled based on the temperature and the actual thermal management requirement of the energy storage battery. The temperature of the cooling water output by the water cooling unit can be determined based on the actual thermal management requirement of the energy storage battery, and then the operation of the air conditioning unit is controlled based on the outlet water temperature of the water cooling unit and the temperature of the cooling water output by the required water cooling unit.
Optionally, during operation of the water-cooling unit, pressure data at the exhaust port of the compressor of the water-cooling unit may also be monitored to determine whether the compressor is operating within a safe pressure interval. If the pressure data monitored during the operation of the compressor is not within the safe pressure interval, an alarm signal can be output to indicate that the operation of the compressor may have a potential safety hazard.
In the implementation method, the influence of the ambient temperature and the pressure on the water cooling unit of the energy storage system is considered. Under the condition of determining the temperature range of the ambient temperature, the control of the operation of the water-cooling unit is realized based on the pressure data of the exhaust port of the compressor, so that the operation of the water-cooling unit can be better adapted to the current environment, and the operation safety of the water-cooling unit is improved.
In the implementation manner, the fan can be operated at the first operating frequency, so that the environment where the water cooling unit is located can be cooled rapidly, and the operating environment of the water cooling unit is restored to a safe temperature environment.
Consider that in the case of temperature and environmental safety, one is that the pressure of the discharge port of the compressor is abnormally high and may decrease with a decrease in the ambient temperature, and the other is that the pressure of the discharge port of the compressor is not decreased with a decrease in the ambient temperature. Different treatment modes can be adopted according to different conditions, so that the operation safety of the water cooling unit is improved better.
The water cooling unit control method provided by the embodiment of the application can further comprise a step 340 and a step 350.
And 340, after the fan runs for a specified time period at the first running frequency, obtaining second pressure data of an exhaust port of a compressor of the water cooling unit.
Alternatively, the specified duration may be set according to actual requirements, for example, the set first temperature threshold may be set relatively high, the first specified duration may be relatively long, and the set first temperature threshold may be set relatively low, the first specified duration may be relatively short.
Optionally, the specified duration may be set according to an actual working cooling effect of the fan, for example, the first specified duration may be relatively shorter if the actual working cooling effect of the fan is good, and the first specified duration may be relatively longer if the actual working cooling effect of the fan is general.
Alternatively, the first specified duration may be a value set at random. For example, the first specified duration may be a duration of 7min, 10min, 12min, 15min, etc.
If the second pressure data is greater than the first pressure threshold, step 350 may be performed.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the second pressure data, the water-cooled controller obtaining the second pressure data from the first detector when the second pressure data is desired to be used.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the second pressure data, and the first detector may transmit the pressure data detected by the first detector to the water-cooled controller in real time. And after the fan operates at the first operating frequency for a specified period of time, acquiring pressure data transmitted by the first detector in real time as the second pressure data.
Alternatively, the first detector may collect and store pressure data of the exhaust port of the compressor according to a set time rule. For example, the first detector may be coupled to a memory in which the collected pressure data is stored in real time. And when the second pressure data is needed to be used, the water cooling controller screens the second pressure data from the pressure data stored in the memory. For example, the pressure data detected by the first detector may be filtered out, and the pressure data is detected after the fan is operated at the first operating frequency for a specified period of time.
And 350, controlling the water cooling unit to stop and outputting a fault alarm signal.
Considering that if the pressure data of the discharge port of the compressor is not sufficiently lowered after the fan is subjected to the cooling process at a relatively high operating frequency, it may be indicated that the pressure data of the discharge port of the compressor is not a virtual high due to an excessively high ambient temperature. Under the condition, the water cooling unit can be stopped to better protect the operation safety of the water cooling unit.
For example, the fault alert signal may be used to indicate that the ambient temperature of the water chiller is too high and that the pressure at the compressor discharge is too high, and that there may be a fault in the water chiller.
The fault alert signal may be presented by an indicator light. The indicator light may be presented in a variety of colors, for example, the various colors being used to represent different alert signals. For example, a red signal light may represent a fault alarm signal.
The fault alarm signal can also be displayed through a display interface of the water cooling unit. The malfunction alerting signal content may include sound signal, picture signal, etc.
The fault alert signal may also be transmitted to a terminal device through which the specified user is presented. The fault alert signal content may include text information.
In the implementation mode, the fault alarm signal can be output, so that a warning effect is achieved, the running of the water cooling unit under unsafe conditions is reduced, and the overall safety and the running reliability of the water cooling unit are improved.
As shown in FIG. 3, the water chiller control method provided by the embodiment of the application can further comprise a step 360 and a step 370.
Step 360, obtaining third pressure data of the exhaust port of the compressor of the water cooling unit after the fan operates at the first operating frequency for a specified period of time.
If the third pressure data is not greater than the first pressure threshold, step 370 may be performed.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the third pressure data, the water-cooled controller obtaining the third pressure data from the first detector when the third pressure data is desired to be used.
Alternatively, the water-cooled controller may establish a communication connection with a first detector that detects the third pressure data, and the first detector may transmit the pressure data detected by the first detector to the water-cooled controller in real time. And after the fan operates at the first operating frequency for a specified period of time, acquiring pressure data transmitted by the first detector in real time as the third pressure data.
Alternatively, the first detector may collect and store pressure data of the exhaust port of the compressor according to a set time rule. For example, the first detector may be coupled to a memory in which the collected pressure data is stored in real time. And when the third pressure data is needed to be used, the water cooling controller screens the third pressure data from the pressure data stored in the memory. For example, the pressure data detected by the first detector may be filtered out, and the pressure data is detected after the fan is operated at the first operating frequency for a specified period of time.
And step 370, outputting an abnormality alarm signal.
The abnormal alarm signal can be presented through an indicator lamp, can be presented through a display interface of the water cooling unit, and can be transmitted to terminal equipment passing through a designated user for presentation through the terminal equipment.
For example, the anomaly alarm signal may be used to indicate that the ambient temperature of the water chiller unit is too high.
In the implementation manner, even if the third pressure data is not greater than the first pressure threshold, an alarm signal can be output so as to prompt that the environment temperature is too high, so that a relevant user can conveniently and accurately know the change condition of the actual running environment of the water cooling unit, and the running safety of the water cooling unit is improved.
In one embodiment, if the third pressure data is not greater than the first pressure threshold, as shown in fig. 4, the method in this embodiment may further include steps 381 to 383.
Step 381, determining a required operation frequency of the fan of the water-cooled unit based on the third pressure data, and controlling the fan to operate at the required operation frequency.
The water cooling unit can be pre-stored with operation logic, and can be operated according to the refrigeration or heating requirement of an actual energy storage battery under the conditions that the surrounding environment is normal and the pressure of an exhaust port of the compressor is also normal. Different fan operation frequencies can be configured according to different pressures of the exhaust ports of the compressors, and fan operation frequencies corresponding to the pressures of the exhaust ports of the different compressors are stored in advance. When the fan operation needs to be controlled, the required operation frequency of the fan matched with the third pressure data can be obtained from the pre-stored data based on the third pressure data.
In step 382, the outlet water temperature of the water cooling unit is obtained.
Optionally, the water outlet temperature of the water cooling unit can be realized by a third detector arranged in a water supply loop of the water cooling unit and at a water inlet of the energy storage battery. The third detector can collect the water outlet temperature of the water cooling unit according to a set time rule.
Alternatively, the real-time temperature data collected by the third detector may be obtained when the outlet water temperature of the water chiller is desired.
Optionally, the third detector may store the temperature data collected by the third detector in time sequence, and may acquire the temperature data of the required time when the outlet water temperature of the water chiller is required.
And 383, controlling the working frequency of the compressor based on the outlet water temperature.
For example, the water chiller may obtain a temperature at the water inlet of the energy storage battery, and control operation of the water chiller based on the temperature and the actual thermal management requirements of the energy storage battery.
The water inlet may be a water inlet of one battery cluster contained in the energy storage battery, or may be a water inlet shared by a plurality of battery clusters contained in the energy storage battery.
The pressure change at the compressor discharge may be monitored during operation of the compressor and the fan, and when the pressure exceeds the first pressure threshold, the first operating frequency provided above for the fan may be employed, followed by the logic process of steps 340 through 370. The logic of steps 381 through 383 described above may be employed when the pressure does not exceed the first pressure threshold.
In order to further increase the safety of the operation of the water-cooling unit, a correlation process may also be performed in the region of the first ambient temperature that is not within the reliable temperature range of the water-cooling unit. Based on this, as shown in fig. 5, if the first ambient temperature is less than the second temperature threshold, the water-cooling unit control method provided by the embodiment of the present application may further include step 390 of outputting an alarm signal.
The alarm signal can be presented through an indicator lamp, can be presented through a display interface of the water cooling unit, and can be transmitted to terminal equipment passing through a designated user for presentation through the terminal equipment.
The second temperature threshold may be-35 ℃, -40 ℃, -30 ℃ for example.
Optionally, outputting the alarm signal comprises acquiring fourth pressure data of the air suction port of the compressor, and if the fourth pressure data is smaller than a second pressure threshold value, controlling the water cooling unit to stop and outputting a fault alarm signal.
When the pressure of the suction port of the compressor is small, the suction amount of the suction port of the compressor is small, and this state also causes poor heat dissipation and lubrication failure of the compressor, which may seriously cause damage to the compressor.
Therefore, when the ambient temperature is lower than the second temperature threshold value and the pressure of the air suction port of the compressor is lower than the second pressure threshold value, the influence on the water cooling unit is relatively serious, and therefore, the water cooling unit can be stopped and a fault alarm signal can be output, so that the safety of the water cooling unit is better protected.
Optionally, outputting the alarm signal includes acquiring fifth pressure data of the suction port of the compressor, and outputting the alarm signal if the fifth pressure data is not less than a second pressure threshold.
The warning alarm signal can be used for prompting that the environmental temperature of the water cooling unit is too low.
When the ambient temperature is lower than the second temperature threshold value, but the pressure of the air suction port of the compressor is not lower than the second pressure threshold value, the operation reliability of the water cooling unit is not affected, so that only a warning signal for achieving a warning effect can be output, and the safety of the water cooling unit is better protected.
The second pressure threshold may be set in accordance with the actual operating capacity of the compressor.
Through the implementation mode, when the ambient temperature can not meet the operation standard of the water-cooling unit, the water-cooling unit can be adaptively adjusted to alarm strategies, and the operation safety of the water-cooling unit is improved.
When the ambient temperature cannot meet the standard of safe operation of the water-cooling unit, the flow can be used for better protecting the safety of the water-cooling unit. And when the ambient temperature is within the standard interval of safe operation of the water-cooling unit, the control can be based on the actual requirement of the energy storage battery. The water cooling unit in the embodiment is used for providing a thermal management function for the energy storage battery. Based on this, as shown in FIG. 5, if the first ambient temperature is within the defined interval, the water-cooling unit control method may further include step 3100, controlling the fan of the water-cooling unit and the compressor of the water-cooling unit to operate according to the thermal management requirements of the energy storage battery.
The thermal management requirements may be heating requirements, cooling requirements, etc. The thermal management requirements may also include, for example, a target temperature to which to tune.
The limited interval can be a temperature interval in which the water cooling unit can safely operate. The defined interval may be, for example, an interval defined by the first temperature threshold and the second temperature threshold.
Illustratively, this step 3100 may include a step 3101 and a step 3102.
Step 3101, obtaining a temperature difference between a water inlet of the water supply loop of the water cooling unit and a water outlet of the energy storage battery.
The water inlet of the energy storage battery can be a water inlet of a battery cluster, and can also be a unified water inlet integrally arranged by a plurality of battery clusters.
Step 3102, dynamically controlling operation of the fan of the water-cooling unit and the compressor of the water-cooling unit according to the temperature difference.
For example, the water chiller may have a thermal management strategy for the water chiller pre-stored. The thermal management strategy of the water-cooled unit may include operating frequencies of fans and compressors of the water-cooled unit under different thermal management requirements.
When necessary, the operation frequencies of the fans and the compressors of the water cooling unit can be determined from the thermal management strategy of the water cooling unit, and the water cooling unit is operated according to the operation frequencies.
According to the method provided by the embodiment of the application, the environmental temperature and the pressure of equipment in the water cooling unit are controlled and identified in stages, and when the temperature and the pressure are in different stages, different means can be adopted to realize warning.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
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| CN112909375A (en) * | 2021-03-22 | 2021-06-04 | 扬州嘉和新能源科技有限公司 | Control method of battery thermal management unit |
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| CN117096502A (en) * | 2023-08-08 | 2023-11-21 | 湖州微蜂新能源科技有限公司 | Water cooling control method for battery |
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| CN112909375A (en) * | 2021-03-22 | 2021-06-04 | 扬州嘉和新能源科技有限公司 | Control method of battery thermal management unit |
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