CN113794004A - Cooling system and method - Google Patents
Cooling system and method Download PDFInfo
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- CN113794004A CN113794004A CN202111089534.2A CN202111089534A CN113794004A CN 113794004 A CN113794004 A CN 113794004A CN 202111089534 A CN202111089534 A CN 202111089534A CN 113794004 A CN113794004 A CN 113794004A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/635—Control systems based on ambient temperature
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- 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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- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the invention provides a cooling system and a cooling method, and relates to the technical field of heat exchange. The cooling system comprises a first heat exchange assembly, a second heat exchange assembly, a control valve, a first pipeline, a second pipeline and a third pipeline, the first pipeline and the third pipeline are connected end to form a first circulation loop, the second pipeline and the third pipeline are connected end to form a second circulation loop, the first heat exchange assembly and the control valve are arranged on the first pipeline, the second heat exchange assembly is arranged on the second pipeline, and the energy storage battery cabinet is arranged on the third pipeline; the valve is controlled to be opened under the condition that the environmental temperature value is less than or equal to a first preset temperature value, so that the first heat exchange assembly exchanges heat with the cooling liquid; and the control valve is closed under the condition that the environmental temperature value is greater than the first preset temperature value, so that the second heat exchange assembly exchanges heat with the cooling liquid. Different modes can be switched to carry out heat exchange on cooling liquid in the cooling system under the condition of different environmental temperatures, and the energy consumption of the whole cooling system can be reduced.
Description
Technical Field
The invention relates to the technical field of cooling, in particular to a cooling system and a cooling method.
Background
The cooling system is connected with the energy storage battery cabinet and used for cooling the battery pack in the energy storage battery cabinet, the cooling system cools the cooling liquid circulating between the cooling system and the energy storage battery cabinet, and the battery pack is cooled through the cooling liquid. However, in the process of cooling the cooling liquid by the existing cooling system, the cooling liquid is directly subjected to heat exchange, and the cooling liquid is cooled by adopting the same mode under different conditions, so that the energy consumption of the system is large, and the energy waste is caused.
Disclosure of Invention
The invention aims to provide a cooling system and a cooling method, which can switch different modes to exchange heat for cooling liquid in the cooling system under the condition of different environmental temperatures, and can reduce the energy consumption of the whole cooling system.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a cooling system for cooling a battery pack in an energy storage battery cabinet, where the cooling system includes: the energy storage battery cabinet comprises a first heat exchange assembly, a second heat exchange assembly, a control valve, a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline and the third pipeline are connected end to form a first circulation loop;
the control valve is opened under the condition that the environmental temperature value is less than or equal to a first preset temperature value, so that the first heat exchange assembly exchanges heat with the cooling liquid;
and when the environmental temperature value is greater than the first preset temperature value, the control valve is closed, so that the second heat exchange assembly exchanges heat with the cooling liquid.
In an alternative embodiment of the present invention, the first heat exchange assembly includes a cryogenic heat exchanger disposed on the first pipeline.
In an optional embodiment of the present invention, the second heat exchange assembly includes a compressor, a condenser, an expansion valve, and a plate exchanger, the compressor, the condenser, the expansion valve, and the plate exchanger are sequentially connected, and the plate exchanger is disposed on the second pipeline.
In an optional embodiment of the present invention, the cooling system further includes a heat sink, and the heat sink is disposed corresponding to the first heat exchange assembly and the second heat exchange assembly.
In an optional embodiment of the present invention, the first heat exchange assembly and the second heat exchange assembly are disposed opposite to each other.
In an alternative embodiment of the present invention, the cooling system further comprises a water pump disposed on the third pipeline.
In a second aspect, an embodiment of the present invention provides a cooling method, which is applied to the cooling system provided in the first aspect, and the cooling method includes:
acquiring an environmental temperature value;
judging whether the environmental temperature value is less than or equal to a first preset temperature value or not;
if the environmental temperature value is less than or equal to the first preset temperature value, controlling the control valve to be opened to enable the first heat exchange assembly to exchange heat with the cooling liquid;
and if the environmental temperature value is greater than the first preset temperature value, controlling the control valve to be closed, so that the second heat exchange assembly exchanges heat with the cooling liquid.
In an alternative embodiment of the present invention, after the step of controlling the control valve to close and open the second heat exchange assembly, the cooling method further comprises:
judging whether the environment temperature value is less than or equal to a second preset temperature value, wherein the second preset temperature value is greater than the first preset temperature value;
if the ambient temperature value is less than or equal to the second preset temperature value, acquiring the charge-discharge multiplying power of the battery pack;
judging whether the charge-discharge multiplying power is smaller than a preset multiplying power value or not;
and if the charge-discharge multiplying power is smaller than the preset multiplying power value, controlling the first heat exchange assembly to be closed and the control valve to be opened.
In an alternative embodiment of the present invention, the cooling method further comprises:
and if the charging and discharging multiplying power is larger than or equal to the preset multiplying power value, continuing to execute the step of controlling the control valve to close and opening the second heat exchange assembly to enable the second heat exchange assembly to exchange heat with the cooling liquid.
In an alternative embodiment of the present invention, the cooling method further comprises:
and if the environmental temperature value is greater than the second preset temperature value, continuing to execute the step of controlling the control valve to close and starting the second heat exchange assembly to enable the second heat exchange assembly to exchange heat with the cooling liquid.
The embodiment of the invention has the following beneficial effects: the cooling system comprises a first heat exchange assembly, a second heat exchange assembly, a control valve, a first pipeline, a second pipeline and a third pipeline, the first pipeline and the third pipeline are connected end to form a first circulation loop, the second pipeline and the third pipeline are connected end to form a second circulation loop, the first heat exchange assembly and the control valve are arranged on the first pipeline, the second heat exchange assembly is arranged on the second pipeline, and the energy storage battery cabinet is arranged on the third pipeline; the valve is controlled to be opened under the condition that the environmental temperature value is less than or equal to a first preset temperature value, so that the first heat exchange assembly exchanges heat with the cooling liquid; and the control valve is closed under the condition that the environmental temperature value is greater than the first preset temperature value, so that the second heat exchange assembly exchanges heat with the cooling liquid.
In the embodiment of the invention, the current environmental temperature value is relatively low under the condition that the environmental temperature value is less than or equal to the first preset temperature value, the first heat exchange assembly can be adopted to exchange heat for the cooling liquid by utilizing the environmental temperature, and the second heat exchange assembly is adopted to exchange heat for the cooling liquid to quickly cool the cooling liquid if the environmental temperature value is greater than the first preset temperature value, which indicates that the current environmental temperature value is higher and cannot quickly cool the cooling liquid. Adopt first heat exchange assembly to carry out the heat transfer to the coolant liquid under the condition that ambient temperature value is less than or equal to first preset temperature value, adopt second heat exchange assembly to carry out the heat transfer under the condition that ambient temperature value is greater than first preset temperature value, can switch different modes under the ambient temperature's of difference condition and carry out the heat transfer to the coolant liquid in the cooling system, can reduce whole cooling system's energy consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a cooling system according to a first embodiment of the present invention.
Fig. 2 is a flow chart of a cooling method according to a second embodiment of the present invention.
Icon: 100-a cooling system; 110-a first heat exchange assembly; 112-a cryogenic heat exchanger; 120-a second heat exchange assembly; 121-a compressor; 123-a condenser; 125-an expansion valve; 127-plate exchange; 130-a control valve; 140 — a first conduit; 150-a second conduit; 160-a third line; 170-a heat sink; 180-water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
First embodiment
Referring to fig. 1, the present embodiment provides a cooling system 100, the cooling system 100 provided in the present embodiment is mainly used for being connected to an energy storage battery cabinet and cooling a battery pack in the energy storage battery cabinet, and the cooling system 100 provided in the present embodiment can switch different ways to exchange heat with a cooling liquid in the cooling system 100 under different environmental temperatures, so as to reduce energy consumption of the entire cooling system 100.
The cooling system 100 is connected with the energy storage battery cabinet and used for cooling the battery pack in the energy storage battery cabinet, the cooling system 100 cools the cooling liquid circulating between the cooling system 100 and the energy storage battery cabinet, and the battery pack is cooled through the cooling liquid. However, in the process of cooling the cooling liquid by the conventional cooling system 100, the cooling liquid is directly subjected to heat exchange, and the cooling liquid is cooled in the same manner under different conditions, which results in large energy consumption of the system and energy waste. The cooling system 100 provided by the embodiment can improve the above problem, and can switch different modes to exchange heat with the cooling liquid in the cooling system 100 under different ambient temperatures, thereby reducing the energy consumption of the whole cooling system 100.
In the present embodiment, the cooling system 100 includes: the energy storage battery cabinet comprises a first heat exchange assembly 110, a second heat exchange assembly 120, a control valve 130, a first pipeline 140, a second pipeline 150 and a third pipeline 160, wherein the first pipeline 140 and the third pipeline 160 are connected end to form a first circulation loop, the second pipeline 150 and the third pipeline 160 are connected end to form a second circulation loop, the first heat exchange assembly 110 and the control valve 130 are arranged on the first pipeline 140, the second heat exchange assembly 120 is arranged on the second pipeline 150, and the energy storage battery cabinet is arranged on the third pipeline 160;
the control valve 130 is opened under the condition that the environmental temperature value is less than or equal to the first preset temperature value, so that the first heat exchange assembly 110 exchanges heat with the cooling liquid;
and when the ambient temperature value is greater than the first preset temperature value, the control valve 130 is closed, so that the second heat exchange assembly 120 exchanges heat with the cooling liquid.
In this embodiment, it is described that the current ambient temperature value is relatively low under the condition that the ambient temperature value is less than or equal to the first preset temperature value, the first heat exchange assembly 110 may be adopted to exchange heat with the coolant by using the ambient temperature, and it is described that the current ambient temperature value is relatively high under the condition that the ambient temperature value is greater than the first preset temperature value, so that the coolant cannot be rapidly cooled, and then the second heat exchange assembly 120 is adopted to exchange heat with the coolant, so that the coolant is rapidly cooled. Adopt first heat exchange assembly 110 to carry out the heat transfer to the coolant liquid under the condition that ambient temperature value is less than or equal to first preset temperature value, adopt second heat exchange assembly 120 to carry out the heat transfer under the condition that ambient temperature value is greater than first preset temperature value, can switch different modes under the ambient temperature's of difference condition and carry out the heat transfer to the coolant liquid in cooling system 100, can reduce whole cooling system 100's energy consumption.
Preferably, in this embodiment, the first preset temperature value is 0 degrees.
In the present embodiment, the first heat exchange assembly 110 includes a cryogenic heat exchanger 112, and the cryogenic heat exchanger 112 is disposed on the first pipeline 140.
Under the condition that the environmental temperature value is less than or equal to the first preset temperature value, the control valve 130 is opened to enable the cooling liquid to enter the low-temperature heat exchanger 112, and the environmental temperature value is low, so that the cooling liquid entering the low-temperature heat exchanger 112 can be directly subjected to heat exchange by utilizing the environmental temperature value, and the cooling liquid can be rapidly cooled.
The cooling system 100 further includes a heat sink 170, and the heat sink 170 is disposed corresponding to the first heat exchange assembly 110 and the second heat exchange assembly 120.
In this embodiment, in the process of performing heat exchange by using the low-temperature heat exchanger 112, in order to accelerate the heat exchange between the coolant and the environment, the heat sink 170 is disposed at the low-temperature heat exchanger 112 to accelerate the volatilization of heat of the coolant and accelerate the heat exchange of the coolant.
It is easy to understand that the low temperature heat exchanger 112 directly uses the environment to exchange heat with the cooling liquid, and does not need to use other mediums to exchange heat, thereby reducing the energy loss.
In this embodiment, the second heat exchange assembly 120 includes a compressor 121, a condenser 123, an expansion valve 125, and a plate exchanger 127, the compressor 121, the condenser 123, the expansion valve 125, and the plate exchanger 127 are sequentially connected, and the plate exchanger 127 is disposed on the second pipeline 150.
In this embodiment, the second heat exchange assembly 120 is equivalent to an air conditioner, and under the condition that the ambient temperature value is greater than the first preset temperature value, the control valve 130 is closed, and the heat exchange medium flows to the plate and changes 127 places, and changes 127 through the plate and carries out heat exchange with the heat exchange medium, thereby rapidly cooling the coolant.
The radiator 170 is arranged at the low-temperature heat exchanger 112 and the condenser 123, and the radiator 170 is adopted to dissipate heat no matter the first heat exchange assembly 110 or the second heat exchange assembly 120 is adopted to exchange heat with the cooling liquid, so that the number of elements of the whole cooling system 100 can be reduced, and the cost of the cooling system 100 can be saved.
In this embodiment, the first heat exchanging assembly 110 and the second heat exchanging assembly 120 are disposed opposite to each other.
The low-temperature heat exchanger 112 and the condenser 123 are both arranged close to the radiator 170, and when the ambient temperature value is less than or equal to the first preset temperature value, the control valve 130 is opened, the cooling liquid enters the first pipeline 140, and the radiator 170 exchanges heat with the low-temperature heat exchanger 112. Under the condition that the ambient temperature value is greater than the first preset temperature value, the control valve 130 is closed, the cooling liquid enters the second pipeline 150, and the radiator 170 exchanges heat with the condenser 123.
In this embodiment, the cooling system 100 further includes a water pump 180, and the water pump 180 is disposed on the third pipeline 160.
Wherein, water pump 180 mainly used provides the power of coolant liquid circulation, and the coolant liquid after making the cooling can flow to energy storage battery cabinet department, gives the battery package heat dissipation in the energy storage battery cabinet, and the cooling is again through first heat exchange assembly 110 or second heat exchange assembly 120 afterwards, so the circulation.
The working principle of the cooling system 100 provided by the embodiment is as follows: in this embodiment, the control valve 130 is opened to exchange heat with the cooling liquid through the low temperature heat exchanger 112 under the condition that the link temperature value is less than or equal to the first preset temperature value. Under the condition that the environmental temperature value is greater than the first preset temperature value, the control valve 130 is closed to exchange heat for the cooling liquid through the plate exchanger 127.
In summary, in the cooling system 100 provided in this embodiment, it is described that the current ambient temperature value is relatively low under the condition that the ambient temperature value is less than or equal to the first preset temperature value, the first heat exchange assembly 110 may be adopted to exchange heat with the cooling liquid by using the ambient temperature, and it is described that the current ambient temperature value is relatively high under the condition that the ambient temperature value is greater than the first preset temperature value, and the cooling liquid cannot be cooled rapidly, and then the second heat exchange assembly 120 is adopted to exchange heat with the cooling liquid, so that the cooling liquid is cooled rapidly. Adopt first heat exchange assembly 110 to carry out the heat transfer to the coolant liquid under the condition that ambient temperature value is less than or equal to first preset temperature value, adopt second heat exchange assembly 120 to carry out the heat transfer under the condition that ambient temperature value is greater than first preset temperature value, can switch different modes under the ambient temperature's of difference condition and carry out the heat transfer to the coolant liquid in cooling system 100, can reduce whole cooling system 100's energy consumption.
Second embodiment
Referring to fig. 2, the present embodiment provides a cooling method, which can switch different ways to exchange heat for the cooling liquid in the cooling system 100 under different environmental temperatures, so as to reduce energy consumption of the entire cooling system 100.
For the sake of brief description, where this embodiment is not mentioned, reference may be made to the first embodiment.
Step S100, an environmental temperature value is obtained.
In this embodiment, the ambient temperature value is a temperature value of an environment where the current energy storage battery cabinet is located, and if the ambient temperature value is low, whether the control valve 130 is opened or not can be determined through the ambient temperature value.
Step S200, judging whether the environmental temperature value is less than or equal to a first preset temperature value.
The current ambient temperature value is relatively low when the ambient temperature value is smaller than or equal to the first preset temperature value, the first heat exchange assembly 110 can be used for exchanging heat for the cooling liquid by using the ambient temperature, the current ambient temperature value is higher when the ambient temperature value is larger than the first preset temperature value, the cooling liquid cannot be cooled quickly, and then the second heat exchange assembly 120 is used for exchanging heat for the cooling liquid, so that the cooling liquid is cooled quickly.
In this embodiment, whether to open the control valve 130 may be determined by determining whether the ambient temperature value is less than or equal to a first preset temperature value.
In step S300, if the ambient temperature value is less than or equal to the first preset temperature value, the control valve 130 is controlled to open, so that the first heat exchange assembly 110 exchanges heat with the cooling liquid.
In this embodiment, when the ambient temperature value is less than or equal to the first preset temperature value, it is indicated that the current ambient temperature value is relatively low, and the first heat exchange assembly 110 may be adopted to exchange heat with the coolant by using the ambient temperature.
In step S400, if the ambient temperature value is greater than the first preset temperature value, the control valve 130 is controlled to close, so that the second heat exchange assembly 120 exchanges heat with the cooling liquid.
In this embodiment, it is described that the current ambient temperature value is higher under the condition that the ambient temperature value is greater than the first preset temperature value, and the coolant cannot be cooled rapidly, then the second heat exchange assembly 120 is adopted to exchange heat with the coolant, so that the coolant is cooled rapidly.
Step S500, determining whether the ambient temperature value is less than or equal to a second preset temperature value, wherein the second preset temperature value is greater than the first preset temperature value.
In this embodiment, when the ambient temperature value is greater than the first preset temperature value, it is continuously determined whether the ambient temperature value is less than or equal to the second preset temperature value. When the ambient temperature value is greater than the first preset temperature value and less than or equal to the second preset temperature value, it indicates that the current ambient temperature value is low, and the first heat exchange assembly 110 can be used for exchanging heat with the cooling liquid under the condition that the temperature of the battery pack is low.
If the environmental temperature value is greater than the second preset temperature value, the steps of controlling the control valve 130 to close and opening the second heat exchange assembly 120 to enable the second heat exchange assembly 120 to exchange heat with the cooling liquid are continuously executed.
Wherein the second preset temperature value is 10 degrees.
Step S600, if the environmental temperature value is less than or equal to a second preset temperature value, acquiring the charge and discharge multiplying power of the battery pack.
In this embodiment, the charge/discharge rate can reflect the temperature value of the battery pack, and the smaller the charge/discharge rate, the smaller the temperature value of the battery pack is, and the smaller the required cooling capacity of the coolant is. Conversely, the larger the charge/discharge rate of the battery pack is, the larger the temperature value of the battery pack is, and the larger the cooling capacity of the coolant is required.
Step S700, judging whether the charge-discharge multiplying power is smaller than a preset multiplying power value.
In this embodiment, the relationship between the charge and discharge multiplying power and the preset multiplying power value is determined, and it may be determined whether the temperature value of the battery pack is higher or lower, if the charge and discharge multiplying power is smaller than the preset multiplying power value, the temperature value of the battery pack is considered to be lower, and if the charge and discharge multiplying power is greater than or equal to the preset multiplying power value, the temperature value of the battery pack is considered to be higher.
Step S800, if the charge-discharge multiplying power is smaller than the preset multiplying power value, the second heat exchanging assembly 120 is controlled to be closed and the control valve 130 is controlled to be opened.
If the charge-discharge multiplying power is smaller than the preset multiplying power value, it is indicated that the temperature value of the current battery pack is small, the first heat exchange assembly 110 can be used for exchanging heat with the cooling liquid, the compressor 121 of the second heat exchange assembly 120 is controlled to be closed, and the control valve 130 is controlled to be opened.
In the present embodiment, the predetermined magnification value is 0.1 degrees.
If the charging and discharging multiplying power is greater than or equal to the preset multiplying power value, the steps of controlling the control valve 130 to close and opening the second heat exchange assembly 120 to enable the second heat exchange assembly 120 to exchange heat with the cooling liquid are continuously executed.
The working principle of the cooling method provided by the embodiment is as follows: and under the condition that the link temperature value is less than or equal to the first preset temperature value, the control valve 130 is opened to exchange heat for the cooling liquid through the low-temperature heat exchanger 112. Under the condition that the environmental temperature value is greater than the first preset temperature value, the control valve 130 is closed to exchange heat for the cooling liquid through the plate exchanger 127.
In summary, in the cooling system 100 provided in this embodiment, it is described that the current ambient temperature value is relatively low under the condition that the ambient temperature value is less than or equal to the first preset temperature value, the first heat exchange assembly 110 may be adopted to exchange heat with the cooling liquid by using the ambient temperature, and it is described that the current ambient temperature value is relatively high under the condition that the ambient temperature value is greater than the first preset temperature value, and the cooling liquid cannot be cooled rapidly, and then the second heat exchange assembly 120 is adopted to exchange heat with the cooling liquid, so that the cooling liquid is cooled rapidly. Adopt first heat exchange assembly 110 to carry out the heat transfer to the coolant liquid under the condition that ambient temperature value is less than or equal to first preset temperature value, adopt second heat exchange assembly 120 to carry out the heat transfer under the condition that ambient temperature value is greater than first preset temperature value, can switch different modes under the ambient temperature's of difference condition and carry out the heat transfer to the coolant liquid in cooling system 100, can reduce whole cooling system 100's energy consumption.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A cooling system for cooling a battery pack in an energy storage battery cabinet, the cooling system comprising: the energy storage battery cabinet comprises a first heat exchange assembly, a second heat exchange assembly, a control valve, a first pipeline, a second pipeline and a third pipeline, wherein the first pipeline and the third pipeline are connected end to form a first circulation loop;
the control valve is opened under the condition that the environmental temperature value is less than or equal to a first preset temperature value, so that the first heat exchange assembly exchanges heat with the cooling liquid;
and when the environmental temperature value is greater than the first preset temperature value, the control valve is closed, so that the second heat exchange assembly exchanges heat with the cooling liquid.
2. The cooling system of claim 1, wherein the first heat exchange assembly comprises a cryogenic heat exchanger disposed on the first conduit.
3. The cooling system of claim 1, wherein the second heat exchange assembly comprises a compressor, a condenser, an expansion valve, and a plate exchanger, the compressor, the condenser, the expansion valve, and the plate exchanger are connected in sequence, and the plate exchanger is disposed on the second pipeline.
4. The cooling system of claim 1, further comprising a heat sink disposed in correspondence with the first heat exchange assembly and the second heat exchange assembly.
5. The cooling system of claim 4, wherein the first heat exchange assembly and the second heat exchange assembly are disposed opposite to each other.
6. The cooling system according to claim 1, further comprising a water pump provided on the third pipeline.
7. A cooling method applied to the cooling system according to any one of claims 1 to 6, the cooling method comprising:
acquiring an environmental temperature value;
judging whether the environmental temperature value is less than or equal to a first preset temperature value or not;
if the environmental temperature value is less than or equal to the first preset temperature value, controlling the control valve to be opened to enable the first heat exchange assembly to exchange heat with the cooling liquid;
and if the environmental temperature value is greater than the first preset temperature value, controlling the control valve to be closed, so that the second heat exchange assembly exchanges heat with the cooling liquid.
8. The cooling method according to claim 7, wherein after the step of controlling the control valve to close and open the second heat exchange assembly, the cooling method further comprises:
judging whether the environment temperature value is less than or equal to a second preset temperature value, wherein the second preset temperature value is greater than the first preset temperature value;
if the ambient temperature value is less than or equal to the second preset temperature value, acquiring the charge-discharge multiplying power of the battery pack;
judging whether the charge-discharge multiplying power is smaller than a preset multiplying power value or not;
and if the charge-discharge multiplying power is smaller than the preset multiplying power value, controlling the first heat exchange assembly to be closed and the control valve to be opened.
9. The cooling method according to claim 8, further comprising:
and if the charging and discharging multiplying power is larger than or equal to the preset multiplying power value, continuing to execute the step of controlling the control valve to close and opening the second heat exchange assembly to enable the second heat exchange assembly to exchange heat with the cooling liquid.
10. The cooling method according to claim 8, further comprising:
and if the environmental temperature value is greater than the second preset temperature value, continuing to execute the step of controlling the control valve to close and starting the second heat exchange assembly to enable the second heat exchange assembly to exchange heat with the cooling liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111089534.2A CN113794004A (en) | 2021-09-16 | 2021-09-16 | Cooling system and method |
Applications Claiming Priority (1)
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| CN114583336A (en) * | 2022-03-04 | 2022-06-03 | 阳光电源股份有限公司 | Anti-icing method and device for liquid-cooled battery, cooling system and energy storage system |
| CN117239304A (en) * | 2023-11-16 | 2023-12-15 | 深圳永泰数能科技有限公司 | Liquid cooling energy storage thermal management system and method |
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| CN209487668U (en) * | 2019-02-22 | 2019-10-11 | 奇瑞汽车股份有限公司 | The battery cooling system of electric car |
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| CN114583336A (en) * | 2022-03-04 | 2022-06-03 | 阳光电源股份有限公司 | Anti-icing method and device for liquid-cooled battery, cooling system and energy storage system |
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