CN116387701A - Control method and control device of liquid cooling energy storage system and liquid cooling energy storage system - Google Patents
Control method and control device of liquid cooling energy storage system and liquid cooling energy storage system Download PDFInfo
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- 238000001816 cooling Methods 0.000 title claims abstract description 157
- 239000007788 liquid Substances 0.000 title claims abstract description 154
- 238000004146 energy storage Methods 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 194
- 238000004590 computer program Methods 0.000 claims description 13
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000003190 augmentative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- 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
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Abstract
The application discloses a control method and device of a liquid cooling energy storage system and the liquid cooling energy storage system, and belongs to the technical field of energy storage. The liquid cooling energy storage system comprises an energy storage battery, a heat exchange unit and a liquid cooling device communicated with a water side pipeline of the heat exchange unit, wherein the liquid cooling device is used for radiating heat of the energy storage battery; the control method comprises the following steps: acquiring the water pressure of a target position of the liquid cooling device; controlling a water pump of the heat exchange unit to reduce the flow under the condition that the water pressure at the target position reaches a first target value P1; and controlling the opening target time of the pressure relief valve on the water side pipeline of the heat exchange unit under the condition that the water pump has reduced the flow and the water pressure of the target position reaches the second target value P2. According to the control method of the liquid cooling energy storage system, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the system is improved, the system is not stopped due to the reduction of the flow of the water pump and the physical pressure relief, and the operation of the energy storage battery is ensured to the greatest extent.
Description
Technical Field
The application belongs to the technical field of energy storage, and particularly relates to a control method and device of a liquid cooling energy storage system and the liquid cooling energy storage system.
Background
The energy storage system is used in large scale as a key link of power grid peak-valley adjustment or clean energy storage. The energy storage system generally adopts an energy storage battery, the energy storage battery needs to be subjected to thermal management in the charging and discharging process, and a mature and effective thermal management mode is a liquid cooling thermal management system.
A liquid cooling plate in a heat management system of the liquid cooling energy storage system is communicated with a water side pipeline of the heat exchange unit through a pipeline. Most of water side pipelines of the heat exchanger unit are made of stainless steel or nylon, and the water side pipelines are high in pressure bearing capacity and can bear 6 Bar-8 Bar water pressure. The liquid cooling plates are mostly punched or blown, and have weaker bearing capacity, generally below 3Bar. When the system is blocked to cause overlarge water pressure or the system water pump is out of control, the liquid cooling plate is easy to damage, and the liquid cooling plate is usually clung to the energy storage battery or integrated in a battery box body where the energy storage battery is located, the damage of the liquid cooling plate can lead to scrapping of the energy storage battery, and huge economic loss is caused.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a control method, a control device and a liquid cooling energy storage system for a liquid cooling energy storage system, so that the risk of overpressure damage of the liquid cooling device is reduced from multiple dimensions.
In a first aspect, the present application provides a control method of a liquid cooling energy storage system, where the liquid cooling energy storage system includes an energy storage battery, a heat exchange unit, and a liquid cooling device that is communicated with a water side pipeline of the heat exchange unit, and the liquid cooling device is used for dissipating heat from the energy storage battery; the control method comprises the following steps:
acquiring the water pressure of the target position of the liquid cooling device;
controlling a water pump of the heat exchange unit to reduce the flow under the condition that the water pressure of the target position reaches a first target value P1;
and under the condition that the water pump has reduced flow and the water pressure at the target position reaches a second target value P2, controlling the pressure release valve on the water side pipeline of the heat exchange unit to be opened for a target duration, wherein P1 is smaller than P2.
According to the control method of the liquid cooling energy storage system, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the system is improved, the system is not stopped due to the reduction of the flow rate of the water pump and the physical pressure relief, the operation of the energy storage battery is ensured to the greatest extent, and the stability of the system is improved.
According to one embodiment of the present application, after the controlling the pressure release valve on the water side line of the heat exchange unit to open for a target period of time, the method further includes:
and under the condition that the water pressure of the target position reaches a third target value P3, controlling the heat exchange unit to stop, wherein P2 is smaller than P3.
According to one embodiment of the present application, the following are satisfied:
2.8Bar<P1<3.0Bar；3.0Bar<P2<3.2Bar；3.2Bar<P3<3.5Bar。
according to one embodiment of the application, the heat exchange unit comprises a heat exchanger, a compressor and the water pump, wherein a heat exchange medium passage of the heat exchanger is connected with the compressor, and a water side pipeline of the heat exchanger is connected with the liquid cooling device through the water pump;
the control of the shutdown of the heat exchange unit comprises the following steps: and controlling the compressor and the water pump to be powered off.
According to an embodiment of the application, the water pump is a variable frequency pump, the control the water pump of heat exchange unit reduces the flow, includes:
and controlling the water pump to reduce the frequency.
According to one embodiment of the present application, in a case where it is determined that the water pressure at the target position reaches the first target value P1, controlling the water pump of the heat exchange unit to reduce the flow rate includes:
and under the condition that the water pressure at the target position reaches the first target value P1, controlling the water pump of the heat exchange unit to reduce the flow rate, and outputting alarm information.
According to one embodiment of the present application, the target position is a position where the pressure of the liquid cooling device is maximum.
According to an embodiment of the application, the liquid cooling device comprises a plurality of liquid cooling plates which are connected in parallel, an inlet of the liquid cooling plates is connected with a water side pipeline water supply side of the heat exchange unit through an inlet branch pipe, an outlet of the liquid cooling plates is connected with a water side pipeline backwater side of the heat exchange unit through an outlet branch pipe, and the target position is the closest inlet branch pipe of the water side pipeline water supply side.
In a second aspect, the present application provides a control device of a liquid cooling energy storage system, where the liquid cooling energy storage system includes an energy storage battery, a heat exchange unit, and a liquid cooling device that is communicated with a water side pipeline of the heat exchange unit, and the liquid cooling device is used for dissipating heat from the energy storage battery; the control device includes:
the first acquisition module is used for acquiring the water pressure of the target position of the liquid cooling device;
the first control module is used for controlling the water pump of the heat exchange unit to reduce the flow rate under the condition that the water pressure of the target position reaches a first target value P1;
and the second control module is used for controlling the opening target duration of the pressure release valve on the water side pipeline of the heat exchange unit under the condition that the water pump has reduced flow and the water pressure of the target position reaches a second target value P2, wherein P1 is smaller than P2.
According to the control device of the liquid cooling energy storage system, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the system is improved, the system is stopped due to the fact that the flow of the water pump is reduced and the physical pressure is relieved, the operation of the energy storage battery is guaranteed to the greatest extent, and the stability of the system is improved.
In a third aspect, the present application provides a liquid-cooled energy storage system comprising: the device comprises an energy storage battery, a heat exchange unit, a liquid cooling device communicated with a water side pipeline of the heat exchange unit and the control device.
According to the liquid cooling energy storage system provided by the embodiment of the application, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the liquid cooling energy storage system is high, the system shutdown can not be caused by the reduction of the flow rate of the water pump and the physical pressure relief, the operation of the energy storage battery is ensured to the maximum extent, and the stability of the liquid cooling energy storage system is high.
In a fourth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the method for controlling the liquid cooling energy storage system according to the first aspect when executing the computer program.
In a fifth aspect, the present application provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements a method for controlling a liquid-cooled energy storage system according to the first aspect.
In a sixth aspect, the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the control method of the liquid cooling energy storage system according to the first aspect.
In a seventh aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements a method for controlling a liquid-cooled energy storage system according to the first aspect.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a schematic flow chart of a control method of a liquid-cooled energy storage system according to an embodiment of the present disclosure;
FIG. 2 is a second flow chart of a control method of the liquid-cooled energy storage system according to the embodiment of the present application;
FIG. 3 is a third flow chart of a control method of the liquid-cooled energy storage system according to the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a liquid-cooled energy storage system according to an embodiment of the present disclosure;
fig. 5 is a schematic layout structure of a liquid-cooled energy storage system according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a control device of a liquid-cooled energy storage system according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Reference numerals:
the energy storage battery 410, an inlet branch pipe 422, an outlet branch pipe 423, a pressure sensor 424 and a water side pipeline 430.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
The terms first, second and the like in the description and in the claims, 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, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The control method of the liquid cooling energy storage system, the control device of the liquid cooling energy storage system, the electronic equipment and the readable storage medium provided by the embodiment of the application are described in detail below by means of specific embodiments and application scenes of the specific embodiments with reference to the accompanying drawings.
The control method of the liquid cooling energy storage system can be applied to the terminal, and can be specifically executed by hardware or software in the terminal.
The execution main body of the liquid cooling energy storage system control method provided by the embodiment of the application may be an electronic device or a functional module or a functional entity capable of implementing the liquid cooling energy storage system control method in the electronic device, where the electronic device in the embodiment of the application includes, but is not limited to, a host, a server, a computer, or the like of the liquid cooling energy storage system, and the liquid cooling energy storage system control method provided by the embodiment of the application is described below by taking the electronic device as an execution main body as an example.
The liquid cooling energy storage system comprises an energy storage battery 410, a heat exchange unit and a liquid cooling device, wherein the liquid cooling device is used for radiating heat for the energy storage battery 410, and the liquid cooling device is communicated with a water side pipeline 430 of the heat exchange unit.
The heat exchanger unit may include a heat exchanger, where the heat exchanger includes a water side pipeline 430, the water side pipeline 430 is communicated with the liquid cooling device, and a water pump is further installed on the water side pipeline 430.
In operation, the water pump drives liquid cold water to flow between the water side pipeline 430 and the liquid cooling device, and when flowing through the liquid cooling device, the liquid cold water takes away heat of the energy storage battery 410, and when flowing through the heat exchanger, the liquid cold water dissipates heat.
The heat exchanger may take a variety of forms.
For example, the heat exchanger may be in the form of fins, which may be combined with a fan.
Alternatively, the heat exchanger may have a cooling side line, in which embodiment the heat exchanger unit may comprise a cooling system in communication with the cooling side line. In this way, the liquid-cooled water flow exchanges heat with the medium in the cooling-side line when passing through the heat exchanger, and the medium in the cooling-side line is cooled when passing through the cooling system.
The cooling system may take a variety of forms, for example the cooling system may comprise a compressor and the medium may be a refrigerant, respectively.
As shown in fig. 1, the control method of the liquid cooling energy storage system includes: step 110, step 120 and step 130.
Step 110, obtaining the water pressure of a target position of the liquid cooling device;
in this step, the water pressure at the location may be monitored by a pressure sensor 424, such as by installing the pressure sensor 424 within a liquid cooling plate, or by installing the pressure sensor 424 at the inlet of a liquid cooling plate.
In actual implementation, it may be designed that the pressure sensor 424 periodically collects pressure data, or that the pressure sensor 424 periodically transmits pressure data, such as transmitting water pressure every 3 s.
Step 120, controlling a water pump of the heat exchange unit to reduce the flow rate under the condition that the water pressure at the target position reaches a first target value P1;
in this step, the first target value P1 may be a preliminarily calibrated constant value.
Alternatively, the first target value P1 may be a value determined by the processor based on the current state, for example, the first target value P1 may be determined based on the service life of the liquid cooling device, and it may be understood that as the service life increases, the pressure bearing capability of the liquid cooling device decreases to some extent, and accordingly, the first target value P1 corresponding to the current actual situation may be determined.
In some examples, the first target value P1 satisfies: 2.8Bar < P1<3.0Bar, such as p1=2.9 Bar.
Step 120 may include issuing a first control command to a water pump of the heat exchanger unit, where it is determined that the water pressure at the target location reaches a first target value P1, the first control command being for instructing the water pump to reduce the flow rate.
After the water pump reduces the flow, the water pressure in the water side pipeline 430 of the liquid cooling device and the heat exchange unit can be reduced, so that the risk of damage to the liquid cooling device is reduced, and the reliability of the system is improved.
In some examples, the water pump may be a variable frequency pump, controlling the water pump of the heat exchange unit to reduce flow, including: and controlling the water pump to reduce the frequency.
In addition, in this step, the liquid cooling device is not completely stopped, the cooling water in the liquid cooling device still keeps circulating, and the heat exchange unit also continues to work, and cools the cooling water in the water side pipeline 430, that is, in this case, the liquid cooling energy storage system is not stopped, so that the operation of the energy storage battery 410 is ensured to the greatest extent, and the system stability is high.
For some normal water pressure fluctuation, the mode can effectively prevent the abnormal shutdown of the system, and the risk can be reduced in advance by reducing the flow rate of the water pump.
And 130, controlling a relief valve on a water side pipeline 430 of the heat exchange unit to open for a target duration, wherein P1 is smaller than P2 under the condition that the water pump has reduced flow and the water pressure at the target position reaches a second target value P2.
Step 130 may include sending a second control command to a pressure relief valve of the heat exchange unit, where the water pump is determined to have reduced flow and the water pressure at the target location reaches a second target value P2, where the second control command is used to instruct the pressure relief valve to open for a target period of time.
In some examples, the second target value P2 satisfies: 3.0Bar < P2<3.2Bar, such as p2=3.1 Bar.
In this step, the second target value P2 may be a preliminarily calibrated constant value.
Alternatively, the second target value P2 may be a value determined by the processor based on the current state, for example, the second target value P2 may be determined based on the usage time of the liquid cooling device, and it may be understood that as the usage time increases, the pressure bearing capability of the liquid cooling device may be reduced to a certain extent, and accordingly, the second target value P2 corresponding to the current situation may be determined.
In other words, step 130 is a post-response of step 120, after step 120 is performed, the water pressure continues to rise, step 130 is performed again, and step 130 is a physical pressure relief, so that a certain amount of cooling water is discharged, so as to reduce the water pressure in the liquid cooling device, thereby reducing the risk of damage to the liquid cooling device and improving the reliability of the system.
The target duration may be a pre-calibrated fixed value or the target duration may be a value determined by the processor based on the current state, such as the second target value P2 may be determined based on the actual water temperature.
In addition, in this step, the liquid cooling device is not completely stopped, the cooling water in the liquid cooling device still keeps circulating flow, and the heat exchange unit also continues to work, and cools the cooling water in the water side pipeline 430, that is, in this case, the liquid cooling energy storage system is not stopped, so that the operation of the energy storage battery 410 is ensured to a greater extent, and the system stability is high.
According to the control method of the liquid cooling energy storage system, provided by the embodiment of the application, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the system is improved, the system is stopped due to the fact that the flow of the water pump is reduced and the physical pressure is relieved, the operation of the energy storage battery is guaranteed to the greatest extent, and the stability of the system is improved.
In some embodiments, in step 120, in a case where it is determined that the water pressure at the target position reaches the first target value P1, controlling the water pump of the heat exchange unit to reduce the flow rate includes:
and under the condition that the water pressure at the target position reaches the first target value P1, controlling the water pump of the heat exchange unit to reduce the flow rate, and outputting alarm information.
The alert information may be transmitted to a server, which in turn issues to a target terminal, such as a manager of the device, or the alert information may be directly transmitted to the target terminal, or the alert information may be directly displayed on a screen or output through sound information.
In other words, in step 120, in addition to taking preliminary safety measures to reduce the flow rate of the water pump, alarm information is also output so as to prompt the manager of possible risks in time.
In some embodiments, step 120, in a case where it is determined that the water pump has reduced the flow rate and the water pressure at the target position reaches the second target value P2, controlling the pressure release valve on the water side line 430 of the heat exchange unit to open for a target period of time includes: in case it is determined that the water pump has lowered the flow rate and the water pressure at the target position reaches the second target value P2, the pressure release valve on the water side pipe 430 of the heat exchanger unit is controlled to be opened for a target period of time, and alarm information is outputted.
In other words, in step 130, in addition to taking the preliminary physical pressure relief safety measure, alarm information is also output so as to prompt the manager of possible risks in time.
In some embodiments, as shown in fig. 2, after controlling the pressure release valve on the water side line 430 of the heat exchanger unit to open for a target period of time in step 130, the control method may further include:
and 140, controlling the heat exchange unit to stop under the condition that the water pressure at the target position reaches a third target value P3, wherein P2 is smaller than P3.
In this step, the third target value P3 may be a preliminarily calibrated constant value.
Alternatively, the third target value P3 may be a value determined by the processor based on the current state, for example, the third target value P3 may be determined based on the usage time of the liquid cooling device, and it may be understood that as the usage time increases, the pressure bearing capability of the liquid cooling device may be reduced to a certain extent, and accordingly, the third target value P3 according with the current situation may be determined.
In some examples, the third target value P3 satisfies: 3.2Bar < P3<3.5Bar, such as p3=3.4 Bar.
Step 140 may include issuing a third control command to the heat exchanger unit to indicate that the heat exchanger unit is shut down if it is determined that the water pressure at the target location reaches a third target value P3.
In other words, step 140 is a post response of step 130, after step 130 is executed, the water pressure continues to rise, that is, step 120 and step 130 are determined to be invalid, step 140 is executed, and step 140 directly controls the shutdown of the heat exchanger unit to effectively protect the liquid cooling device.
In some examples, the heat exchange unit may include a heat exchanger, a compressor, and a water pump, wherein a heat exchange medium passage of the heat exchanger is connected to the compressor, and a water side pipeline 430 of the heat exchanger is connected to the liquid cooling device through the water pump; the controlling of the heat exchange unit shutdown in step 140 includes: and controlling the power off of the compressor and the water pump.
Therefore, the water pump can not continuously pressurize the liquid cooling device, the compressor can not continuously cool the heat exchanger, the risk of damage caused by overpressure of the liquid cooling device can be reduced, supercooling and icing of cooling water can be prevented, and the safety of the whole liquid cooling energy storage system is protected.
In some examples, the first, second, and third target values P1, P2, and P3 may satisfy:
2.8Bar<P1<3.0Bar；3.0Bar<P2<3.2Bar；3.2Bar<P3<3.5Bar。
such as p1=2.85 Bar, p2=3.05 Bar, p3=3.3 Bar.
Through the calibration of the target value, the multistage pressure protection of the liquid cooling device can be realized, the overpressure damage risk of the liquid cooling device is reduced, the operation of the energy storage battery is ensured to the greatest extent, and the system stability is improved.
In some examples, as shown in fig. 3, the control method of the liquid-cooled energy storage system includes three stages of protection:
under the condition that the water pressure at the target position reaches a first target value P1, adopting primary protection, and performing frequency-reducing operation on the water pump;
under the condition that primary protection is adopted but the water pressure at the target position continuously rises to reach a second target value P2, secondary protection is adopted, and physical pressure relief is started;
in the case where the second-stage protection is adopted but the water pressure at the target position continues to rise to reach the third target value P3, the third-stage protection is adopted, and forced stop is performed.
It can be understood that when the liquid cooling energy storage system works, if abnormality occurs, the water pressure is gradually increased from small to large, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions through multistage protection treatment, the reliability of the system is improved, the system is not stopped due to the reduction of the flow of the water pump and the physical pressure relief, the operation of the energy storage battery is ensured to the greatest extent, and the stability of the system is improved.
In some embodiments, the target location is where the pressure of the liquid cooling device is greatest.
Therefore, the control method does not need to monitor the pressure of all liquid cooling plates in the system, only monitors the maximum pressure, and has low implementation cost.
The target position may be determined by simulation or actual measurement. The pressure sensor 424 is connected in series on the cold plate connecting pipeline, and the measuring range can meet the pressure measuring requirement.
In some embodiments, as shown in fig. 4 and 5, the liquid cooling device includes a plurality of liquid cooling plates connected in parallel, an inlet of the liquid cooling plates is connected to a water supply side of a water side pipeline 430 of the heat exchange unit through an inlet branch pipe 422, and an outlet of the liquid cooling plates is connected to a water return side of the water side pipeline 430 of the heat exchange unit through an outlet branch pipe 423, where a target position is the inlet branch pipe 422 closest to the water supply side of the water side pipeline 430.
The water pressure of the inlet tap 422 is substantially equal to the maximum water pressure of the liquid cooling plate, and the water pressure of the inlet tap 422 closest to the water supply side of the water side line 430 is the maximum water pressure of all the inlet taps 422.
In other words, the mode does not need to modify the liquid cooling plate or the battery pack box body, and only needs to replace one section of the inlet branch pipe 422, so that the implementation is convenient.
According to the control method of the liquid cooling energy storage system, the execution main body can be a control device of the liquid cooling energy storage system. In this embodiment of the present application, a control device of a liquid cooling energy storage system is described by taking a control method for executing the liquid cooling energy storage system by using a control device of the liquid cooling energy storage system as an example.
The embodiment of the application also provides a control device of the liquid cooling energy storage system.
The liquid cooling energy storage system comprises an energy storage battery 410, a heat exchange unit and a liquid cooling device communicated with a water side pipeline 430 of the heat exchange unit, wherein the liquid cooling device is used for radiating heat of the energy storage battery 410.
As shown in fig. 6, the control device of the liquid-cooled energy storage system includes: a first acquisition module 610, a first control module 620, and a second control module 630.
A first obtaining module 610, configured to obtain a water pressure at a target position of the liquid cooling device;
a first control module 620, configured to control a water pump of the heat exchanger unit to reduce a flow rate when it is determined that the water pressure at the target position reaches a first target value P1;
the second control module 630 is configured to control a pressure release valve on the water side pipeline 430 of the heat exchanger unit to open for a target period of time, where P1< P2, when it is determined that the water pump has reduced the flow rate and the water pressure at the target position reaches the second target value P2.
According to the control device of the liquid cooling energy storage system, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the system is improved, the system is stopped due to the fact that the flow of the water pump is reduced and the physical pressure is relieved, the operation of an energy storage battery is guaranteed to the greatest extent, and the stability of the system is improved.
In some embodiments, the control device of the liquid-cooled energy storage system may further include: and the third control module is used for controlling the shutdown of the heat exchange unit under the condition that the water pressure at the target position reaches a third target value P3 after controlling the opening of the pressure relief valve on the water side pipeline 430 of the heat exchange unit for a target time period, and P2 is smaller than P3.
In some embodiments, the following are satisfied:
2.8Bar<P1<3.0Bar；3.0Bar<P2<3.2Bar；3.2Bar<P3<3.5Bar。
in some embodiments, the heat exchange unit comprises a heat exchanger, a compressor and a water pump, wherein a heat exchange medium passage of the heat exchanger is connected with the compressor, and a water side pipeline 430 of the heat exchanger is connected with the liquid cooling device through the water pump; and the third control module is also used for controlling the power-off of the compressor and the water pump.
In some embodiments, the water pump is a variable frequency pump, and the first control module 620 is further configured to control the water pump to frequency down.
In some embodiments, the first control module 620 is further configured to control the water pump of the heat exchange unit to reduce the flow rate and output an alarm message when it is determined that the water pressure at the target position reaches the first target value P1.
In some embodiments, the target location is where the pressure of the liquid cooling device is greatest.
In some embodiments, the liquid cooling device comprises a plurality of liquid cooling plates connected in parallel, wherein an inlet of the liquid cooling plates is connected with a water supply side of a water side pipeline 430 of the heat exchange unit through an inlet branch pipe 422, an outlet of the liquid cooling plates is connected with a water return side of the water side pipeline 430 of the heat exchange unit through an outlet branch pipe 423, and a target position is the inlet branch pipe 422 closest to the water supply side of the water side pipeline 430.
The control device of the liquid cooling energy storage system in the embodiment of the application may be an electronic device, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, the electronic device may be a mobile phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, mobile internet appliance (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/Virtual Reality (VR) device, robot, wearable device, ultra-mobile personal computer, UMPC, netbook or personal digital assistant (personal digital assistant, PDA), etc., but may also be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the embodiments of the present application are not limited in particular.
The control device of the liquid cooling energy storage system in the embodiment of the application may be a device with an operating system. The operating system may be a microsoft (Windows) operating system, an Android operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
The control device of the liquid cooling energy storage system provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 1 to 3, and in order to avoid repetition, a detailed description is omitted here.
The embodiment of the application also provides a liquid cooling energy storage system.
The liquid-cooled energy storage system includes: the device comprises an energy storage battery, a heat exchange unit, a liquid cooling device communicated with a water side pipeline of the heat exchange unit and any one of the control devices.
According to the liquid cooling energy storage system provided by the embodiment of the application, through a multi-level water pressure protection strategy, the risk of the overpressure damage of the liquid cooling device can be reduced from multiple dimensions, the reliability of the liquid cooling energy storage system is high, the system shutdown can not be caused by the reduction of the flow rate of the water pump and the physical pressure relief, the operation of the energy storage battery is ensured to the maximum extent, and the stability of the liquid cooling energy storage system is high.
In some embodiments, as shown in fig. 7, the embodiment of the present application further provides an electronic device 700, including a processor 701, a memory 702, and a computer program stored in the memory 702 and capable of running on the processor 701, where the program when executed by the processor 701 implements the respective processes of the above-mentioned embodiments of the method for controlling a liquid-cooled energy storage system, and the same technical effects are achieved, and for avoiding repetition, a detailed description is omitted herein.
The electronic device in the embodiment of the application includes the mobile electronic device and the non-mobile electronic device described above.
The embodiment of the application further provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above-mentioned control method embodiment of the liquid cooling energy storage system, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application also provides a computer program product, which comprises a computer program, and the computer program realizes the control method of the liquid cooling energy storage system when being executed by a processor.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or an instruction, implementing each process of the control method embodiment of the liquid cooling energy storage system, and achieving the same technical effect, so as to avoid repetition, and no further description is provided here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
It should be noted that, in this document, 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. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. The control method of the liquid cooling energy storage system is characterized in that the liquid cooling energy storage system comprises an energy storage battery, a heat exchange unit and a liquid cooling device communicated with a water side pipeline of the heat exchange unit, wherein the liquid cooling device is used for radiating heat of the energy storage battery; the control method comprises the following steps:
acquiring the water pressure of the target position of the liquid cooling device;
controlling a water pump of the heat exchange unit to reduce the flow under the condition that the water pressure of the target position reaches a first target value P1;
and under the condition that the water pump has reduced flow and the water pressure at the target position reaches a second target value P2, controlling the pressure release valve on the water side pipeline of the heat exchange unit to be opened for a target duration, wherein P1 is smaller than P2.
2. The method of controlling a liquid-cooled energy storage system according to claim 1, wherein after the controlling the pressure release valve on the water side line of the heat exchanger unit to open for a target period of time, the method further comprises:
and under the condition that the water pressure of the target position reaches a third target value P3, controlling the heat exchange unit to stop, wherein P2 is smaller than P3.
3. The method for controlling a liquid-cooled energy storage system according to claim 2, wherein:
2.8Bar<P1<3.0Bar；3.0Bar<P2<3.2Bar；3.2Bar<P3<3.5Bar。
4. the control method of the liquid cooling energy storage system according to claim 2, wherein the heat exchange unit comprises a heat exchanger, a compressor and the water pump, a heat exchange medium passage of the heat exchanger is connected with the compressor, and a water side pipeline of the heat exchanger is connected with the liquid cooling device through the water pump;
the control of the shutdown of the heat exchange unit comprises the following steps: and controlling the compressor and the water pump to be powered off.
5. The method for controlling a liquid-cooled energy storage system according to claim 1, wherein the water pump is a variable frequency pump, and the controlling the water pump of the heat exchanger unit to reduce the flow rate comprises:
and controlling the water pump to reduce the frequency.
6. The method according to claim 1, wherein controlling the water pump of the heat exchanger unit to reduce the flow rate in the case where it is determined that the water pressure at the target position reaches the first target value P1, comprises:
and under the condition that the water pressure at the target position reaches the first target value P1, controlling the water pump of the heat exchange unit to reduce the flow rate, and outputting alarm information.
7. The method of any one of claims 1-6, wherein the target location is where the pressure of the liquid cooling device is maximum.
8. The method of any one of claims 1-6, wherein the liquid cooling device comprises a plurality of liquid cooling plates connected in parallel, an inlet of the liquid cooling plates is connected to a water side pipeline water supply side of the heat exchange unit through an inlet branch pipe, an outlet of the liquid cooling plates is connected to a water side pipeline water return side of the heat exchange unit through an outlet branch pipe, and the target position is an inlet branch pipe nearest to the water side pipeline water supply side.
9. The control device of the liquid cooling energy storage system is characterized by comprising an energy storage battery, a heat exchange unit and a liquid cooling device communicated with a water side pipeline of the heat exchange unit, wherein the liquid cooling device is used for radiating heat of the energy storage battery; the control device includes:
the first acquisition module is used for acquiring the water pressure of the target position of the liquid cooling device;
the first control module is used for controlling the water pump of the heat exchange unit to reduce the flow rate under the condition that the water pressure of the target position reaches a first target value P1;
and the second control module is used for controlling the opening target duration of the pressure release valve on the water side pipeline of the heat exchange unit under the condition that the water pump has reduced flow and the water pressure of the target position reaches a second target value P2, wherein P1 is smaller than P2.
10. A liquid-cooled energy storage system, comprising: an energy storage battery, a heat exchange unit, a liquid cooling device communicated with a water side pipeline of the heat exchange unit and a control device as claimed in claim 9.
11. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of controlling the liquid-cooled energy storage system of any one of claims 1-8 when the program is executed by the processor.
12. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a method of controlling a liquid-cooled energy storage system according to any one of claims 1-8.
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| CN202310228499.0A CN116387701A (en) | 2023-03-06 | 2023-03-06 | Control method and control device of liquid cooling energy storage system and liquid cooling energy storage system |
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