CN106229574B - cooling method and system for battery pack - Google Patents
cooling method and system for battery pack Download PDFInfo
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- CN106229574B CN106229574B CN201610685897.5A CN201610685897A CN106229574B CN 106229574 B CN106229574 B CN 106229574B CN 201610685897 A CN201610685897 A CN 201610685897A CN 106229574 B CN106229574 B CN 106229574B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring 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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Automation & Control Theory (AREA)
Abstract
The embodiment of the invention provides a cooling method and system for a battery pack. The cooling method of the battery pack provided by the embodiment of the invention comprises the following steps: detecting the temperature of a battery pack, comparing the temperature of the battery pack with a preset temperature threshold, if the temperature of the battery pack is greater than the temperature threshold, determining the target temperature of cooling liquid according to the temperature of the battery pack, and cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature. The cooling method for the battery pack provided by the embodiment of the invention realizes that the target temperature of the cooling liquid required by cooling the battery pack is determined by using the temperature of the battery pack, improves the flexibility of a cooling mode for the battery pack, reduces the consumption of electric energy in the battery pack, improves the rationality of electric energy distribution of the battery pack, and effectively prolongs the service life of the battery pack.
Description
Technical Field
the invention relates to the technical field of batteries, in particular to a battery pack cooling method and system.
Background
at present, with the rapid development of new energy industry, the battery application field is wider, for example, the battery is used in automobiles, and a power battery system is used for providing electric energy for electric automobiles, so that the electric energy becomes a power source of the electric automobiles, and the use of non-renewable resources is reduced.
generally, a battery generates a certain amount of heat in a discharge state, and when the heat is too high, the temperature of the battery exceeds a normal temperature range, the performance of the battery is reduced, and the cycle life of the battery is shortened. This requires cooling the battery system to an optimum state.
In the prior art, when the battery is cooled by water cooling, the adopted cooling mode is simple opening and closing, when the cooling function is opened, the cooling system is in a full-load working state, namely, the battery is cooled by cooling liquid at a fixed temperature by water cooling, so that the energy consumption is high easily, and the energy waste is caused. Moreover, the number of cycles available to the battery is reduced due to the continuous supply of the battery, reducing the useful life of the battery.
Disclosure of Invention
The invention provides a cooling method and a cooling system for a battery pack, which aim to solve the problems that the cooling mode adopted by the prior art is easy to cause higher energy consumption, energy waste is caused, and the service life of a battery is shortened.
The invention provides a cooling method of a battery pack, which comprises the following steps:
Detecting the temperature of the battery pack;
Comparing the temperature of the battery pack with a preset temperature threshold, and if the temperature of the battery pack is greater than the temperature threshold, determining a target temperature of cooling liquid according to the temperature of the battery pack;
and cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature.
further, in the above method, the determining a target temperature of the cooling liquid according to the temperature of the battery pack includes: obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
And according to the temperature of the battery pack, obtaining the corresponding temperature of the cooling liquid from the corresponding relation to be used as the target temperature.
further, in the above method, the cooling the battery pack with the coolant having the temperature less than or equal to the target temperature includes:
detecting the current temperature of the cooling liquid;
If the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to enable the temperature of the cooling liquid to be reduced to the target temperature;
and cooling the battery pack by using the cooling liquid subjected to cooling treatment.
further, in the above method, the cooling the battery pack with the coolant having the temperature less than or equal to the target temperature includes:
Detecting the current temperature of the cooling liquid;
And if the current temperature of the cooling liquid is less than or equal to the target temperature of the cooling liquid, cooling the battery pack by using the cooling liquid.
further, in the above method, the method further includes:
detecting the current temperature of the cooling liquid;
and if the temperature of the battery pack is less than or equal to the temperature threshold value, stopping cooling the battery pack.
the invention also provides a cooling system of the battery pack, which comprises a sensor, a battery monitoring system and a refrigeration control system;
The sensor is used for detecting the temperature of the battery pack and sending the detected temperature of the battery pack to the battery control system;
the battery control system is used for comparing the temperature of the battery pack detected by the sensor with a preset temperature threshold, determining a target temperature of cooling liquid according to the temperature of the battery pack if the temperature of the battery pack is greater than the temperature threshold, and sending the target temperature to the refrigeration control system;
and the refrigeration control system is used for cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature.
Further, in the above system, the battery control system is specifically configured to:
Obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
and according to the temperature of the battery pack, obtaining the corresponding temperature of the cooling liquid from the corresponding relation to be used as the target temperature.
Further, in the above system, the refrigeration control system is specifically configured to:
Detecting the current temperature of the cooling liquid;
if the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to enable the temperature of the cooling liquid to be reduced to the target temperature;
and cooling the battery pack by using the cooling liquid subjected to cooling treatment.
Further, in the above system, the refrigeration control system is specifically configured to:
Detecting the current temperature of the cooling liquid;
and if the current temperature of the cooling liquid is less than or equal to the target temperature of the cooling liquid, cooling the battery pack by using the cooling liquid.
Further, in the above system, the battery control system is further configured to:
And comparing the temperature of the battery pack detected by the sensor with a preset temperature threshold, and if the temperature of the battery pack is less than or equal to the temperature threshold, triggering the refrigeration control system to stop cooling the battery pack.
the cooling method and the cooling system for the battery pack provided by the embodiment of the invention determine whether the battery pack needs to be cooled by comparing the detected temperature of the battery pack with a preset temperature threshold, if the temperature of the battery pack is greater than the temperature threshold, the battery pack needs to be cooled, the target temperature of cooling liquid is determined according to the temperature of the battery pack, and then the battery pack is cooled by using the cooling liquid with the temperature less than or equal to the target temperature. The problem of the energy waste that leads to has higher flexibility, has reduced energy consumption, has avoided the energy waste, has improved the rationality of battery package electric energy distribution, the effectual life who prolongs the battery package.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
fig. 1 is a schematic flow chart illustrating a cooling method for a battery pack according to an embodiment of the present invention;
fig. 2 is a first relationship diagram of a cooling time and a battery temperature of a cooling method for a battery pack according to an embodiment of the present invention;
Fig. 3 is a second relationship diagram of the temperature reduction time and the battery temperature of the cooling method for the battery pack according to the embodiment of the invention;
Fig. 4 is another schematic flow chart of a cooling method for a battery pack according to an embodiment of the present invention;
Fig. 5 is a first structural schematic diagram of a cooling system of a battery pack according to an embodiment of the present invention;
fig. 6 is a second structural schematic diagram of a cooling system of a battery pack according to an embodiment of the present invention.
Reference numerals:
10-Battery pack
11-sensor
101-cooling duct
12-Battery control System
13-refrigeration control system
131-compressor
132-condenser
133-evaporator
134-Water Pump
135-temp. sensor
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. 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.
example one
fig. 1 is a schematic flow chart of a cooling method for a battery pack according to an embodiment of the present invention, and as shown in fig. 1, the cooling method for a battery pack according to the embodiment may specifically include the following steps:
101. The temperature of the battery pack is detected.
Under the general condition, the battery package has an optimum temperature range, work efficiency is the highest when the temperature of battery package is in optimum temperature range, and be favorable to prolonging the life of battery package, when the temperature of battery package is not in optimum temperature range, if in the higher environment of temperature, the heat that the battery package produced distributes slowly, all can influence the performance of battery, consequently, in order to reduce the temperature of the battery package that surpasss optimum temperature range, can improve cooling efficiency again, can adopt the form of water-cooling to cool down the battery package.
In the embodiment of the invention, the cooling method of the battery pack is provided, and can be applied to the automobile which takes electric energy as a power source.
In the embodiment of the invention, the temperature of the battery pack is detected firstly, and the temperature is used for confirming whether the temperature of the battery pack is at the optimal temperature or not and whether the temperature of the battery pack needs to be reduced or not.
in one particular implementation, a temperature sensor may be used to detect the temperature of the battery pack.
102. and comparing the temperature of the battery pack with a preset temperature threshold, and determining the target temperature of the cooling liquid according to the temperature of the battery pack if the temperature of the battery pack is greater than the temperature threshold.
specifically, the optimum temperature of the battery may be used as a temperature threshold, the detected temperature of the battery pack is compared with a preset temperature threshold to determine whether the battery pack meets the optimum temperature, and if the temperature of the battery pack is greater than the temperature threshold, it indicates that the temperature of the battery pack does not meet the optimum temperature, and the battery pack needs to be cooled.
For example, the optimal temperature of the battery pack may be 30 ℃, and if the temperature of the battery pack is 35 ℃, the temperature of the battery pack does not meet the optimal temperature at this time, and the battery pack needs to be cooled.
since the battery pack needs to be cooled, the most suitable cooling liquid temperature for cooling the battery pack is determined according to the temperature of the battery pack, so that the electric energy can be saved to the maximum extent.
For example, fig. 2 is a first relation graph of a cooling time and a battery temperature of a cooling method of a battery pack according to an embodiment of the present invention, and fig. 3 is a second relation graph of a cooling time and a battery temperature of a cooling method of a battery pack according to an embodiment of the present invention, as shown in fig. 2, when a temperature of a battery is 50 ℃, the battery pack is cooled by using water at 20 ℃, 22 ℃, 24 ℃, 26 ℃ and 28 ℃, respectively, and it can be seen from the graph that when a cooling liquid at 22 ℃ is used to cool the battery pack, the temperature of the battery pack can be reduced to about 30 ℃, that is, the temperature of the battery pack is reduced to an optimal temperature. As shown in fig. 3, when the temperature of the battery is 40 ℃, the battery pack is cooled by using the cooling liquids of 20 ℃, 22 ℃, 24 ℃, 26 ℃ and 28 ℃, respectively, and it can be seen from the figure that when the battery pack is cooled by using water of 24 ℃, the temperature of the battery pack can be reduced to about 30 ℃, that is, the temperature of the battery pack is reduced to the optimum temperature.
Wherein, determining the target temperature of the cooling fluid according to the temperature of the battery pack may include:
Obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
According to the temperature of the battery pack, the corresponding temperature of the cooling liquid is obtained from the correspondence as a target temperature.
Specifically, in the embodiment of the present invention, the correspondence between the temperature of the battery pack and the temperature of the cooling liquid may be obtained by specific experimental data, since the temperature change of the battery pack has a certain continuity, and only a part of the data is listed as a representative in the embodiment of the present invention.
table 1 is an example of a correspondence relationship between the temperature of the battery pack and the temperature of the coolant, and table 1 is a table of correspondence relationship between the temperature of the battery pack and the temperature of the coolant in the cooling method for the battery pack according to the embodiment of the present invention.
TABLE 1
As shown in table 1, the first row in the table represents the temperature of the battery, the first column represents the temperature of the coolant, and the middle temperature represents the temperature that can be reached after the battery is cooled, and it can be seen from the table that the temperature of the battery is reduced by using the coolant of 20 ℃, 22 ℃, 24 ℃, 26 ℃ and 28 ℃ when the temperature of the battery is 30 ℃, and the temperature of the battery can be finally reduced to 29.6 ℃ when the temperature of the coolant is 28 ℃. When the temperature of the battery is 35 ℃, the battery is cooled by using cooling liquid with the temperature of 20 ℃, 22 ℃, 24 ℃, 26 ℃ and 28 ℃, and when the temperature of the cooling liquid is 26 ℃, the temperature of the battery can be finally reduced to 30 ℃, and so on. An optimum temperature at which the battery pack can be cooled is determined by the correspondence between the temperature of the battery pack and the temperature of the cooling liquid, and this optimum temperature is taken as the target temperature.
103. and cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature.
According to the corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid, after the corresponding target temperature is obtained, the temperature of the cooling liquid for cooling the battery pack by a user is detected, if the detected temperature of the cooling liquid is higher than the target temperature, the temperature of the cooling liquid for cooling the battery pack needs to be adjusted to reach the target temperature, and then the adjusted cooling liquid is used for cooling the battery pack.
Alternatively, if the detected temperature of the coolant is less than or equal to the target temperature, the battery pack may be cooled by the coolant as it is.
In the cooling method for the battery pack provided by the embodiment of the invention, whether the battery pack needs to be cooled is determined by comparing the detected temperature of the battery pack with the preset temperature threshold, if the temperature of the battery pack is greater than the temperature threshold, the battery pack needs to be cooled, the target temperature of the cooling liquid is determined according to the temperature of the battery pack, and then the battery pack is cooled by the cooling liquid with the temperature less than or equal to the target temperature. The problem of the energy waste that leads to has higher flexibility, has reduced energy consumption, has avoided the energy waste, has improved the rationality of battery package electric energy distribution, the effectual life who prolongs the battery package.
example two
Fig. 4 is another schematic flow chart of a cooling method for a battery pack according to an embodiment of the present invention, and as shown in fig. 4, the cooling method for a battery pack according to the embodiment may specifically include the following steps:
201. The temperature of the battery pack is detected.
in the embodiment of the present invention, a specific process for detecting the temperature of the battery pack is described in detail in step 101 in the above embodiment, and the principle and implementation process in the embodiment of the present invention are the same, and are not described herein again.
202. And comparing the temperature of the battery pack with a preset temperature threshold, and determining the target temperature of the cooling liquid according to the temperature of the battery pack if the temperature of the battery pack is greater than the temperature threshold.
In the embodiment of the present invention, a specific process for determining the target temperature of the cooling liquid according to the temperature of the battery pack is described in detail in step 102 in the above embodiment, and the principle and implementation process in the embodiment of the present invention are the same, and are not described again here.
203. and cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature.
after the target temperature of the cooling liquid is determined according to the temperature of the battery pack, the battery pack can be cooled according to the cooling liquid at the target temperature.
for example, the current temperature of the cooling liquid may be detected; if the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to reduce the temperature of the cooling liquid to the target temperature; further, the battery pack is cooled by the coolant subjected to the temperature reduction treatment.
specifically, the current temperature of the cooling liquid cooled by the battery pack can be detected by using the temperature sensor, if the detected current temperature of the cooling liquid is greater than the target temperature of the cooling liquid, the cooling liquid can be cooled by using the refrigeration control system, and after the current temperature of the cooling liquid is reduced to the target temperature, the refrigeration control system controls to start the circulation of the cooling liquid to cool the battery pack. In order to save electric energy, the temperature of the cooling liquid with the current temperature being higher than the target temperature is only required to be reduced to the target temperature, so that more electric energy can be used by other components, and the utilization rate of the electric energy is improved.
for example, the temperature of the battery pack is 40 ℃, the battery pack needs to be cooled by using a cooling liquid with a target temperature of 24 ℃, if the current temperature of the cooling liquid is 30 ℃, the temperature of the cooling liquid needs to be reduced to 24 ℃, and then the refrigeration control system controls the start cycle to cool the battery pack.
Alternatively, if the current temperature of the coolant is less than or equal to the target temperature of the coolant, the coolant does not need to be cooled, and the battery pack may be directly cooled by the coolant.
for example, the temperature of the battery pack is 40 ℃, the battery pack needs to be cooled by using a cooling liquid with a target temperature of 24 ℃, and if the current temperature of the cooling liquid is detected to be 24 ℃, the refrigeration control system can directly start a cycle to cool the battery pack.
204. And if the temperature of the battery pack is less than or equal to the temperature threshold value, stopping cooling the battery pack.
And the other temperature of the battery is continuously reduced along with the circulation of the cooling liquid, and when the temperature of the battery pack is less than or equal to the temperature threshold value, the refrigeration control system closes the circulation and stops cooling the battery pack. Therefore, the consumption of electric energy is saved, more electric energy can be supplied to other parts, and the utilization rate of the electric energy is improved.
according to the cooling method for the battery pack provided by the embodiment of the invention, whether the battery pack needs to be cooled is determined by comparing the detected temperature of the battery pack with the preset temperature threshold, if the temperature of the battery pack is greater than the temperature threshold, the battery pack needs to be cooled, the target temperature of the cooling liquid is determined according to the temperature of the battery pack, then the battery pack is cooled by the cooling liquid with the temperature less than or equal to the target temperature, and the cooling of the battery pack is stopped after the temperature of the battery pack is reduced to the temperature threshold. In the cooling method for the battery pack provided by the embodiment of the invention, the target temperature of the cooling liquid required by cooling the battery pack is determined according to the temperature of the battery pack, and then the battery pack is cooled according to the target temperature, so that the temperature adjustment of the cooling liquid used in cooling is realized, the problem of energy waste caused by high energy consumption due to the fact that the cooling system uses the cooling liquid with fixed temperature to cool the battery pack when the cooling function is started in the prior art is solved, the flexibility is high, the energy consumption is reduced, the energy waste is avoided, the rationality of electric energy distribution of the battery pack is improved, and the service life of the battery pack is effectively prolonged.
EXAMPLE III
Fig. 5 is a schematic view of a first structure of a cooling system of a battery pack according to an embodiment of the present invention, and as shown in fig. 5, the cooling system of the battery pack according to the embodiment may specifically include: sensor 11, battery control system 12, refrigeration control system 13.
A sensor 11 for detecting the temperature of the battery pack and transmitting the detected temperature of the battery pack to a battery control system 12;
The battery control system 12 is used for comparing the temperature of the battery pack detected by the sensor 11 with a preset temperature threshold, determining the target temperature of the cooling liquid according to the temperature of the battery pack if the temperature of the battery pack is greater than the temperature threshold, and sending the target temperature to the refrigeration control system 13;
And the refrigeration control system 13 is used for cooling the battery pack by using the cooling liquid with the temperature less than or equal to the target temperature.
further, the battery control system 12 is specifically configured to:
obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
according to the temperature of the battery pack, the corresponding temperature of the cooling liquid is obtained from the correspondence as a target temperature.
Further, the refrigeration control system 13 is specifically configured to:
detecting the current temperature of the cooling liquid;
If the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to enable the temperature of the cooling liquid to be reduced to the target temperature;
And cooling the battery pack by using the cooling liquid subjected to temperature reduction treatment.
further, the refrigeration control system 13 is specifically configured to:
Detecting the current temperature of the cooling liquid;
And if the current temperature of the cooling liquid is less than or equal to the target temperature of the cooling liquid, cooling the battery pack by using the cooling liquid.
optionally, the battery control system 12 is further configured to:
the temperature control system is used for comparing the temperature of the battery pack detected by the sensor with a preset temperature threshold value, and if the temperature of the battery pack is smaller than or equal to the temperature threshold value, the refrigeration control system is triggered to stop cooling the battery pack.
Fig. 6 is a second structural schematic diagram of a cooling system of a battery pack according to an embodiment of the present invention, as shown in fig. 6, in an embodiment of the present invention, a battery pack 10 may include: the sensor 11, the battery cell (not shown in the figure), and the cooling pipe 101; the refrigeration control system 13 may include at least: compressor 131, condenser 132, evaporator 133, water pump 134, and temperature sensor 135. After detecting the temperature of the battery pack 10, the sensor 11 sends the temperature to the battery control system 12, the battery control system 12 compares the temperature of the battery pack 10 detected by the sensor 11 with a preset temperature threshold, if the temperature of the battery pack 10 is greater than the temperature threshold, a target temperature of the cooling liquid is determined according to the temperature of the battery pack 10, and the target temperature is sent to the refrigeration control system 13, the refrigeration control system 13 detects the temperature of the cooling liquid in the cooling pipeline 101 through the temperature sensor 135 according to the target temperature, and then the temperature of the cooling liquid is adjusted by respectively controlling the compressor 131, the condenser 132, the evaporator 133 and the water pump 134, so as to cool the battery pack.
In the cooling system for a battery pack according to the embodiment of the present invention, the temperature of the battery pack 10 is detected by the sensor, the detected temperature of the battery pack 10 is sent to the battery control system 12, then the battery control system 12 compares the temperature of the battery pack 10 detected by the sensor 11 with a preset temperature threshold, if the temperature of the battery pack 10 is greater than the temperature threshold, the target temperature of the cooling liquid is determined according to the temperature of the battery pack 10, the target temperature is sent to the refrigeration control system 13, and finally the refrigeration control system 13 cools the battery pack 10 by using the cooling liquid with the temperature less than or equal to the target temperature, in the cooling system for a battery pack according to the embodiment of the present invention, the target temperature of the cooling liquid required for cooling the battery pack 10 is determined according to the temperature of the battery pack 10, and the battery pack 10 is cooled according to the target temperature, realized using the temperature adjustment of coolant liquid when cooling, avoided among the prior art when opening the cooling function, the cooling is that the coolant liquid that uses fixed temperature carries out the water-cooling to battery package 10 and cools down the energy resource consumption that causes is higher, the extravagant problem of the energy that leads to, has higher flexibility, has reduced energy resource consumption, has avoided the energy extravagant, has improved the rationality of battery package 10 electric energy distribution, effectual extension battery package 10's life.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on at least two network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. a method of cooling a battery pack, comprising:
Detecting the temperature of the battery pack;
Comparing the temperature of the battery pack with a preset temperature threshold, and if the temperature of the battery pack is greater than the temperature threshold, determining a target temperature of cooling liquid according to the temperature of the battery pack;
Cooling the battery pack by using a cooling liquid with the temperature less than or equal to the target temperature;
The determining a target temperature of the cooling fluid according to the temperature of the battery pack includes:
Obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
According to the temperature of the battery pack, obtaining the corresponding temperature of the cooling liquid from the corresponding relation to serve as the target temperature;
Wherein the cooling the battery pack with the coolant having the temperature less than or equal to the target temperature includes:
Detecting the current temperature of the cooling liquid;
If the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to enable the temperature of the cooling liquid to be reduced to the target temperature;
Cooling the battery pack by using the cooling liquid subjected to temperature reduction treatment;
if the current temperature of the cooling liquid is less than or equal to the target temperature of the cooling liquid, cooling the battery pack by using the cooling liquid;
The method further comprises the following steps:
and if the temperature of the battery pack is less than or equal to the temperature threshold value, stopping cooling the battery pack.
2. a cooling system of a battery pack is characterized by comprising a sensor, a battery control system and a refrigeration control system;
the sensor is used for detecting the temperature of the battery pack and sending the detected temperature of the battery pack to the battery control system;
The battery control system is used for comparing the temperature of the battery pack detected by the sensor with a preset temperature threshold, determining a target temperature of cooling liquid according to the temperature of the battery pack if the temperature of the battery pack is greater than the temperature threshold, and sending the target temperature to the refrigeration control system;
The refrigeration control system is used for cooling the battery pack by using cooling liquid with the temperature less than or equal to the target temperature;
The battery control system is specifically configured to:
Obtaining a corresponding relation between the temperature of the battery pack and the temperature of the cooling liquid;
according to the temperature of the battery pack, obtaining the corresponding temperature of the cooling liquid from the corresponding relation to serve as the target temperature;
The refrigeration control system is specifically configured to:
Detecting the current temperature of the cooling liquid;
If the current temperature of the cooling liquid is higher than the target temperature of the cooling liquid, cooling the cooling liquid to enable the temperature of the cooling liquid to be reduced to the target temperature;
cooling the battery pack by using the cooling liquid subjected to temperature reduction treatment;
If the current temperature of the cooling liquid is less than or equal to the target temperature of the cooling liquid, cooling the battery pack by using the cooling liquid;
The battery control system is further configured to:
and comparing the temperature of the battery pack detected by the sensor with a preset temperature threshold, and if the temperature of the battery pack is less than or equal to the temperature threshold, triggering the refrigeration control system to stop cooling the battery pack.
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| CN107132865B (en) * | 2017-04-07 | 2020-03-27 | 上海蔚来汽车有限公司 | Active cooling power calibration method and system for energy storage unit of test vehicle |
| CN107845843B (en) * | 2017-09-15 | 2020-01-17 | 宝沃汽车（中国）有限公司 | Power battery system and vehicle |
| CN109752659A (en) * | 2018-12-30 | 2019-05-14 | 蜂巢能源科技有限公司 | The PACK test macro and method of liquid cooling battery |
| CN111628237B (en) * | 2019-02-27 | 2021-07-23 | 北京新能源汽车股份有限公司 | Control method and device of battery thermal management system and controller |
| CN110661059B (en) * | 2019-09-30 | 2021-04-13 | 恒大恒驰新能源汽车科技(广东)有限公司 | Vehicle battery thermal management method, device and system |
| CN113809440B (en) * | 2020-06-11 | 2023-05-26 | 广汽埃安新能源汽车有限公司 | Control method and system for coolant flow of liquid-cooled power battery and automobile |
| CN113829960B (en) * | 2021-09-07 | 2023-10-20 | 岚图汽车科技有限公司 | Electric automobile control method and device, medium and electronic equipment |
| CN113871759A (en) * | 2021-09-26 | 2021-12-31 | 恒大新能源汽车投资控股集团有限公司 | Temperature adjusting method and device of battery thermal management system and electronic equipment |
| CN114335792B (en) * | 2021-11-29 | 2024-02-23 | 三一重型装备有限公司 | Battery temperature control method and device, storage medium and computer equipment |
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