CN111009704B - Battery temperature control system, method, device, vehicle and storage medium - Google Patents

Battery temperature control system, method, device, vehicle and storage medium Download PDF

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Publication number
CN111009704B
CN111009704B CN201911358712.XA CN201911358712A CN111009704B CN 111009704 B CN111009704 B CN 111009704B CN 201911358712 A CN201911358712 A CN 201911358712A CN 111009704 B CN111009704 B CN 111009704B
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Prior art keywords
battery
temperature
valve
liquid
controlling
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CN111009704A (en
Inventor
雍安姣
项阳
殷良艳
付永宏
何艳则
叶坚
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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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
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—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
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • 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
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The embodiment of the application provides a control system, a control method, a control device, a control vehicle and a control storage medium for battery temperature, and relates to the technical field of automobiles. The system comprises: a controller, a first circulation path, and a second circulation path; the first circulation passage comprises a communication valve and a first heat exchanger, the communication valve comprises a first valve port and a second valve port, the first valve port and the second valve port are respectively connected with two ends of the first heat exchanger, and the first circulation passage is used for controlling the temperature of the battery; the second circulation path includes a first heat exchanger and a transmission case, and the first heat exchanger is connected end to end with the transmission case. According to the technical scheme provided by the embodiment of the application, waste heat in the gearbox can be recycled, and the energy consumption required for heating the battery is reduced.

Description

Battery temperature control system, method, device, vehicle and storage medium
Technical Field
The embodiment of the application relates to the technical field of automobiles, in particular to a battery temperature control system, a battery temperature control method, a battery temperature control device, a battery temperature control vehicle and a battery temperature storage medium.
Background
For an automobile driven by electric power, in order to ensure the charging efficiency of its battery, it is necessary to control the temperature of the battery pack within a certain range.
In the related art, for a hybrid electric vehicle driven by both oil and electricity, in order to control the temperature of a battery pack within a certain range, when the battery temperature is too low, an electric heater may be used to heat the battery pack; when the temperature of the battery is too high, the electric heater is stopped to heat.
In the above technology, the battery pack is heated only by the electric heater, so that the energy consumption is excessive, and the energy is not saved.
Disclosure of Invention
The embodiment of the application provides a battery temperature control system, a battery temperature control method, a battery temperature control device, a battery temperature control vehicle and a battery temperature storage medium. The technical scheme is as follows:
in one aspect, an embodiment of the present application provides a control system for a battery temperature, the system including: a controller, a first circulation path, and a second circulation path;
the first circulation passage comprises a communication valve and a first heat exchanger, the communication valve comprises a first valve port and a second valve port, the first valve port and the second valve port are respectively connected with two ends of the first heat exchanger, and the first circulation passage is used for controlling the temperature of a battery;
the second circulation path comprises the first heat exchanger and a gearbox, and the first heat exchanger is connected with the gearbox end to end.
Optionally, the system further comprises a third circulation path and a fan;
the third circulation passage comprises a first on-off valve, the communication valve, a radiator and a second on-off valve, and the first on-off valve, the second on-off valve, the communication valve and the radiator are sequentially connected end to end;
the first heat exchanger is connected with a passage between the first on-off valve and the second on-off valve, and the first heat exchanger is connected with a passage between the second valve port and the radiator.
Optionally, the system further comprises an electric heater.
On the other hand, the embodiment of the application provides a vehicle, and the vehicle comprises the battery temperature control system.
In still another aspect, an embodiment of the present application provides a method for controlling a battery temperature, which is applied to a controller of the above system, where the method includes:
acquiring the temperature of a battery;
and in response to the temperature of the battery being lower than a first threshold value and the temperature of the liquid at the outlet of the first heat exchanger in the first circulation passage being higher than the temperature of the battery, controlling the first circulation passage to heat the battery by controlling the opening of the first valve port and the second valve port of the communication valve.
Optionally, the controlling the first circulation path to heat the battery by controlling the opening of the first valve port and the second valve port of the communication valve includes:
responding to the fact that the outlet liquid temperature of the radiator is higher than the first liquid temperature, and cooling liquid passing through the radiator by controlling the first on-off valve to be opened;
and controlling the cooled liquid in the third circulation passage to heat the battery by controlling the second on-off valve, the first valve port and the second valve port to be opened.
Optionally, the cooling the liquid passing through the radiator by controlling the first on-off valve to be opened includes:
the first on-off valve is controlled to be opened, and natural wind is adopted to cool liquid passing through the radiator; or, the liquid passing through the radiator is cooled by controlling the fan to be started.
Optionally, after the first circulation path is controlled to heat the battery by controlling the opening of the first valve port and the second valve port of the communication valve, the method further includes:
and controlling an electric heater to heat the battery in response to the temperature of the liquid for heating the battery in the first circulation passage being lower than the second liquid temperature.
In yet another aspect, an embodiment of the present application provides a device for controlling a temperature of a battery, which is applied to a controller of the above system, and includes:
the temperature acquisition module is used for acquiring the temperature of the battery;
and the battery heating module is used for responding to the condition that the temperature of the battery is lower than a first threshold value and the temperature of liquid at the outlet of the first heat exchanger in the first circulation passage is higher than the temperature of the battery, and controlling the first circulation passage to heat the battery by controlling the opening of a first valve port and a second valve port of the communication valve.
Optionally, the battery heating module includes:
the liquid cooling sub-module is used for responding to the fact that the outlet liquid temperature of the radiator is higher than the first liquid temperature, and cooling liquid passing through the radiator by controlling the first on-off valve to be opened;
and the battery heating submodule is used for controlling the cooled liquid in the third circulation path to heat the battery by controlling the second break valve, the first valve port and the second valve port to be opened.
Optionally, the liquid cooling submodule is used for cooling the liquid passing through the radiator by natural wind by controlling the first on-off valve to be opened; or, the liquid passing through the radiator is cooled by controlling the fan to be started.
Optionally, the battery heating module is further configured to control the electric heater to heat the battery in response to the temperature of the liquid in the first circulation path, i.e. the liquid flowing through the battery, being lower than the second liquid temperature.
In yet another aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored therein, the computer program being loaded and executed by a processor to implement a method of controlling a battery temperature as described above.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
the temperature of the battery is lower than the first threshold value, the temperature of the liquid at the outlet of the first heat exchanger in the first circulation passage is higher than the temperature of the battery, and the first circulation passage is controlled to heat the battery by controlling the opening of the first valve port and the second valve port of the communication valve, so that the waste heat in the gearbox is recycled, and the energy consumption required for heating the battery is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a control system for battery temperature provided in one embodiment of the present application;
FIG. 2 is a block diagram of a battery temperature control system provided in another embodiment of the present application;
FIG. 3 is a flow chart of a battery temperature control method provided in one embodiment of the present application;
FIG. 4 is a flow chart of a battery temperature control method provided in another embodiment of the present application;
fig. 5 is a flowchart of a battery temperature control method provided in another embodiment of the present application;
FIG. 6 is a block diagram of a control device for battery temperature provided in one embodiment of the present application;
fig. 7 is a block diagram of a control device for battery temperature according to another embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of methods that are consistent with some aspects of the present application as detailed in the accompanying claims.
The technical scheme provided by the embodiment of the application can be applied to electric drive or a hybrid power driven vehicle driven by electric drive, and the vehicle can be a land vehicle such as an automobile, a subway, a light rail, a train and the like, a production type vehicle such as an excavator, a bulldozer, a tractor and the like, a water vehicle such as a ship and the like, or an air vehicle such as an airplane, an airship and the like.
Referring to fig. 1, a block diagram of a battery temperature control system according to one embodiment of the present application is shown. The system 100 includes: a controller, a first circulation path, and a second circulation path.
The first circulation path includes a communication valve 101 and a first heat exchanger 102, the communication valve 101 includes a first valve port 1011 and a second valve port 1012, the first valve port 1011 and the second valve port 1012 are connected to both ends of the first heat exchanger 120, respectively, and the first circulation path is used to control the temperature of the battery 10. The controller may control the opening or closing of the first port 1011 and the second port 1012.
The controller is used for calculating and processing logic of a control system responsible for the temperature of the battery. The controller may be an MCU (Microcontroller Unit, micro control unit) or a CPU (Central Processing Unit ).
In some possible embodiments, as shown in fig. 2, the first circulation path further includes a battery pack 104, the battery 10 is disposed within the battery pack 104, and the battery pack 104 is located between the communication valve 101 and the first heat exchanger 102, so that the first circulation path can heat or cool the battery 10 by the liquid flowing through the battery pack 104.
In some possible embodiments, the liquid in the first circulation path may be water, may be oil, or may be other liquid, which is not limited in this embodiment.
In some possible embodiments, as shown in fig. 2, the first circulation path further includes a first liquid pump 105, the first liquid pump 105 being controlled by the controller, the first liquid pump 105 being operable to power the flow of liquid in the first circulation path.
In some possible embodiments, as shown in fig. 2, the first circulation path further includes a first expansion tank 107, and both ends of the first expansion tank 107 are connected to the second valve port 1012 and the first heat exchanger 102, respectively. On the one hand, the first expansion tank 107 may contain water that is increased in the first heat exchanger 102 due to expansion by heat; on the other hand, the first expansion tank 107 may also supplement the first circulation passage with water.
In some possible embodiments, as shown in fig. 2, the system 100 further comprises a second expansion tank 108, the communication valve 101 further comprises a third valve port 1013, and two ends of the second expansion tank 108 are connected to the first liquid pump 105 and the third valve port 1013, respectively. The third valve 1013 and the first liquid pump 105 are controlled by a controller. On the one hand, the second expansion tank 108 may contain water that is increased in the first circulation path due to expansion by heat; on the other hand, the second expansion tank 108 may also supplement the first circulation path with water.
The second circulation path includes a first heat exchanger 102 and a transmission case 103, and the first heat exchanger 102 is connected end to end with the transmission case 103.
In some possible embodiments, as shown in fig. 2, the second circulation path further includes a second liquid pump 117, the first heat exchanger 102, the gearbox 103 and the second liquid pump 117 are connected in sequence, the second liquid pump 117 is controlled by the controller, and the second liquid pump 117 can power the flow of liquid in the second circulation path.
In some possible embodiments, the liquid in the first circulation path may be water, may be oil, or may be other liquid, which is not limited in this embodiment.
In some possible embodiments, as shown in FIG. 2, the system 100 further includes a third circulation path and a fan 109. The third circulation path includes a second on-off valve 106, a communication valve 101, a radiator 110, and a first on-off valve 111, the second on-off valve 106, the communication valve 101, and the radiator 110 being connected end to end in order. Wherein the first heat exchanger 102 is connected to a passage between the second on-off valve 106 and the first on-off valve 111, and the first heat exchanger 102 is connected to a passage between the second valve port 1012 and the radiator 110. The liquid in the third circulation path is the same liquid as the liquid in the first circulation path. The second on-off valve 106 and the first on-off valve 111 are controlled by a controller. On the one hand, the radiator 110 can cool the liquid in the third circulation path, and the fan 109 can further cool the liquid in the third circulation path; on the other hand, the second on-off valve 106 and the first on-off valve 111 may control the third circulation path to be turned on or off.
In some possible embodiments, the heat sink 110 may be a water air heat sink.
In some possible embodiments, as shown in fig. 2, the third circulation path further includes a third liquid pump 112, and the third liquid pump 112 may power the flow of liquid in the third circulation path.
In some possible embodiments, as shown in FIG. 2, the system 100 further includes a fourth circulation path. The fourth circulation path includes a condenser 113, a compressor 114, and a second heat exchanger 115, the condenser 113, the compressor 114, and the second heat exchanger 115 are sequentially connected end to end, and both ends of the second heat exchanger 115 are respectively connected to the first expansion tank 108 and the third valve 1013, so that the battery 10 can be cooled through the fourth circulation path.
In some possible embodiments, as shown in fig. 2, the fourth circulation path further includes an electronic expansion valve 116, and the electronic expansion valve 116 is controlled by the controller, thereby controlling the flow rate of the refrigerant in the fourth circulation path.
In some possible embodiments, the system 100 further includes an electric heater 20 so that the battery 10 can be heated by way of electrical heating.
In summary, the embodiment of the present application provides a battery temperature control system 100, in which the first valve port 1011 and the second valve port 1012 of the communication valve 101 are respectively connected to two ends of the first heat exchanger 120, and the first heat exchanger 102 is connected to the transmission 103 end to end, so that the first circulation path can heat the liquid in the second circulation path through the first heat exchanger 102, and further, the battery 10 is heated.
The exemplary embodiment of the present application also provides a vehicle including the control system of the battery temperature in the embodiment of fig. 1 or the embodiment of fig. 2 described above. The vehicle may be an automobile, a subway, a light rail, a train, an excavator, a bulldozer or a tractor, which is not limited in this embodiment.
Referring to fig. 3, a flowchart of a battery temperature control method according to an embodiment of the present application is shown. In the present embodiment, the method is mainly applied to the controller described above for illustration. The method may comprise the following steps (301-302):
step 301, the temperature of the battery is obtained.
Wherein the battery may be one or more batteries; the temperature of the battery may be an average temperature of the battery, a temperature at the highest temperature of the battery, or a temperature at the lowest temperature of the battery, which is not limited in the embodiment of the present application.
In some possible embodiments, one or more temperature measurement points are provided inside the battery or on the surface of the battery, and the temperature measurement points may be provided with an electronic thermometer, and the temperature of each temperature measurement point may be obtained by obtaining the measurement value of the electronic thermometer.
In step 302, in response to the temperature of the battery being below a first threshold and the temperature of the liquid at the outlet of the first heat exchanger in the first circulation path being above the temperature of the battery, the first circulation path is controlled to heat the battery by controlling the opening of the first and second ports of the communication valve.
In system 100, the gearbox generates more waste heat during operation; the liquid in the second circulation passage is heated by the waste heat in the gearbox when flowing through the gearbox, so that the waste heat in the gearbox is taken away; when the heated liquid in the gearbox flows through the first heat exchanger, the liquid in the second circulation passage heats the liquid in the first circulation passage flowing through the first heat exchanger at the same time, so that the liquid in the first circulation passage is heated, and the battery can be heated through the first circulation passage.
The first threshold may be 0 degrees celsius, may be 5 degrees celsius, may be 10 degrees celsius, may also be 15 degrees celsius, and the specific value of the first threshold is set by the relevant technicians according to actual conditions, which is not limited in this embodiment of the present application.
In summary, in the technical scheme provided by the embodiment of the application, the temperature of the battery is lower than the first threshold value, the temperature of the liquid at the outlet of the first heat exchanger in the first circulation passage is higher than the temperature of the battery, and the first valve port and the second valve port of the communication valve are controlled to be opened, so that the first circulation passage is controlled to heat the battery, and the waste heat in the gearbox is recycled, and the energy consumption required for heating the battery is reduced.
Referring to fig. 4, a flowchart of a battery temperature control method according to an embodiment of the present application is shown. In the present embodiment, the method is mainly applied to the controller described above for illustration. The method may comprise the following steps (401-403):
step 401, obtaining the temperature of the battery.
This step is the same as or similar to the step 301 of the embodiment of fig. 3, and will not be repeated here.
In step 402, in response to the temperature of the battery being below a first threshold and the temperature of the liquid at the outlet of the first heat exchanger in the first circulation path being above the temperature of the battery, the first circulation path is controlled to heat the battery by controlling the opening of the first and second ports of the communication valve.
A partial explanation of this step may refer to step 302 in the embodiment of fig. 3, which is not described herein.
In some possible embodiments, step 402 may further include the following sub-steps (4021-4022):
in step 4021, in response to the temperature of the outlet liquid of the radiator being higher than the first liquid temperature, the liquid passing through the radiator is cooled by controlling the first on-off valve to open.
The outlet liquid temperature of the radiator refers to the temperature of liquid flowing out of the radiator, and the first on-off valve is controlled to be opened, so that the heated liquid flowing out of the first heat exchanger can flow through the radiator and be cooled by the radiator.
In some possible embodiments, natural wind is used to cool the liquid passing through the radiator by controlling the first on-off valve to open.
In some possible embodiments, the liquid passing through the radiator is cooled by controlling the fan on. The fan accelerates the air flow speed, which can accelerate the cooling speed of the liquid in the radiator.
In some possible embodiments, after the fan is turned on, if the outlet liquid temperature of the radiator is still higher than the first liquid temperature, the second on-off valve and the second valve port are closed, the electric heater is turned on, and the battery is heated by the electric heater.
The first liquid temperature may be 40 degrees celsius, may be 42 degrees celsius, may be 50 degrees celsius, may also be 60 degrees celsius, and a specific value of the first liquid temperature is set by a relevant technician according to actual conditions, which is not limited in this embodiment of the present application.
In step 4022, the second on-off valve, the first valve port and the second valve port are controlled to be opened, so that the cooled liquid in the third circulation path is controlled to heat the battery.
The third circulation path is closed by controlling the second opening/closing valve, the first valve port and the second valve port to be opened. The liquid cooled by the radiator flows into the battery pack from the radiator through the communication valve, so that the liquid in the battery pack can heat the battery.
In step 403, in response to the temperature of the liquid in the first circulation path that heats the battery being lower than the second liquid temperature, the electric heater is controlled to heat the battery.
When the temperature of the liquid for heating the battery is lower than the second liquid temperature in the first circulation passage, the temperature of the liquid for heating the battery is too low, and the heating speed for heating the battery is too low, so that the electric heater can be turned on to control the electric heater to synchronously heat the battery, and the temperature of the battery can be increased as soon as possible.
In some possible embodiments, when the temperature of the battery is higher than the battery upper limit temperature, the compressor, the electronic expansion valve, and the first liquid pump are started, and the third valve port is opened, thereby cooling the battery through the fourth circulation path. The fans may also be turned on simultaneously to accelerate cooling of the battery by the fans. The second liquid temperature may be 30 degrees celsius, may be 28 degrees celsius, may be 25 degrees celsius, may be 20 degrees celsius, may be 15 degrees celsius, and the specific value of the second liquid temperature is set by a relevant technician according to the actual situation, which is not limited in this embodiment of the present application.
Alternatively, when the temperature of the battery is higher than the upper limit temperature of the battery, the fan may be turned on to cool the battery.
The upper limit temperature of the battery can be 30 ℃, 35 ℃, 40 ℃, 50 ℃ or 60 ℃, and the specific value of the upper limit temperature of the battery is set by relevant technicians according to actual conditions, which is not limited in the embodiment of the application.
In summary, in the technical solution provided in the embodiments of the present application, on one hand, when the outlet liquid temperature of the radiator is higher than the first liquid temperature, the liquid in the radiator is cooled; on the other hand, after the fan is started, the outlet liquid temperature of the radiator is still higher than the first liquid temperature, the second on-off valve and the second valve port are closed, and the battery is heated by the electric heater. The liquid for heating the battery is not too high, so that the low working efficiency of the battery caused by too high temperature of the battery is avoided.
In this embodiment of the application, through when the temperature of the liquid of heating the battery is less than the second liquid temperature, control electric heater heats the battery, guaranteed the heating efficiency of battery.
Referring to fig. 5, a flowchart of a battery temperature control method according to another embodiment of the present application is shown. The method may include the following steps (501-508):
step 501, obtaining the temperature T of the battery Electric power 。
Step 502, detecting a temperature T of the battery Electric power Whether or not it is greater than the upper limit T of the battery temperature Upper part If yes, executing the steps of503; if not, then step 504 is performed.
Step 503, starting the compressor, the electronic expansion valve, the fan and the first liquid pump, and opening the third valve port.
Step 504, detecting the temperature T of the battery Electric power Whether or not it is lower than a first threshold T 1 If yes, go to step 505; if not, step 505 is performed.
Step 505, keep the electric heater off.
Step 506, detecting the temperature T of the battery Electric power Whether or not it is smaller than the outlet liquid temperature T of the radiator Out of And the outlet liquid temperature T of the radiator Out of Below the upper limit T of the outlet liquid temperature of the radiator 2 If yes, go to step 507; if not, go to step 508.
In step 507, the first circulation path is controlled to heat the battery.
In the first circulation path, when the temperature T of the liquid for heating the battery 3 Lower than the second liquid temperature T 4 The electric heater is turned on.
Step 508, detecting whether the fan is turned on, if so, turning on the electric heater; if not, the fan is turned on.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Referring to fig. 6, a block diagram of a battery temperature control device according to an embodiment of the present application is shown. The device has the function of realizing the method example of controlling the battery temperature, and is applied to the controller of the system, wherein the function can be realized by hardware or can be realized by executing corresponding software by hardware. The device may be the controller described above or may be provided on the controller. The apparatus 600 may include: a temperature acquisition module 610 and a battery heating module 620.
The temperature obtaining module 610 is configured to obtain a temperature of the battery.
The battery heating module 620 is configured to control the first circulation path to heat the battery by controlling the first valve port and the second valve port of the communication valve to open in response to the temperature of the battery being lower than a first threshold and the temperature of the liquid at the outlet of the first heat exchanger in the first circulation path being higher than the temperature of the battery.
In summary, in the step provided in the embodiment of the present application, the temperature of the battery is lower than the first threshold, and the temperature of the liquid at the outlet of the first heat exchanger in the first circulation path is higher than the temperature of the battery, and the first port and the second port of the communication valve are controlled to be opened, so that the first circulation path is controlled to heat the battery, thereby realizing cyclic utilization of waste heat in the gearbox, and reducing energy consumption required for heating the battery.
In an exemplary embodiment, as shown in fig. 7, the battery heating module 620 includes: a liquid cooling sub-module 621 and a battery heating sub-module 622.
The liquid cooling sub-module 621 is configured to cool the liquid passing through the radiator by controlling the first on-off valve to be opened in response to the temperature of the radiator outlet liquid being higher than the first liquid temperature.
The battery heating submodule 622 is configured to control the cooled liquid in the third circulation path to heat the battery by controlling the second on-off valve, the first valve port, and the second valve port to be opened.
In an exemplary embodiment, as shown in fig. 7, the liquid cooling sub-module 621 is configured to cool the liquid passing through the radiator by natural wind by controlling the first on-off valve to be opened; or, the liquid passing through the radiator is cooled by controlling the fan to be started.
In an exemplary embodiment, the battery heating module 620 is further configured to control an electric heater to heat the battery in response to the temperature of the liquid in the first circulation path that is about to flow through the battery being lower than a second liquid temperature.
It should be noted that, in the apparatus provided in the foregoing embodiment, when implementing the functions thereof, only the division of the foregoing functional modules is used as an example, in practical application, the foregoing functional allocation may be implemented by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to implement all or part of the functions described above. In addition, the apparatus and the method embodiments provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the apparatus and the method embodiments are detailed in the method embodiments and are not repeated herein.
In an exemplary embodiment, a computer readable storage medium is also provided, in which a computer program is stored, which, when being executed by a processor, implements the above-mentioned method of controlling battery temperature.
In an exemplary embodiment, a computer program product is also provided, which, when being executed by a processor, is adapted to carry out the above-mentioned method of controlling the temperature of a battery.
It should be understood that references herein to "a plurality" are to two or more. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (7)

1. A system for controlling the temperature of a battery, the system comprising: a controller, a first circulation path, a second expansion tank, a third circulation path, a fan, and a fourth circulation path;
the first circulation passage comprises a communication valve and a first heat exchanger, the communication valve comprises a first valve port and a second valve port, the first valve port and the second valve port are respectively connected with two ends of the first heat exchanger, and the first circulation passage is used for controlling the temperature of a battery;
the second circulation passage comprises the first heat exchanger and a gearbox, and the first heat exchanger is connected with the gearbox end to end;
the third circulation passage comprises a first on-off valve, the communication valve, a radiator and a second on-off valve, and the first on-off valve, the second on-off valve, the communication valve and the radiator are sequentially connected end to end; the first heat exchanger is connected with a passage between the first on-off valve and the second on-off valve, and the first heat exchanger is connected with a passage between the second valve port and the radiator; wherein the liquid in the third circulation path and the liquid in the first circulation path are the same liquid, and the second on-off valve and the first on-off valve are controlled by the controller;
the first circulating passage further comprises a first expansion water tank, and two ends of the first expansion water tank are respectively connected with the second valve port and the first heat exchanger;
the communication valve further comprises a third valve port, and two ends of the second expansion water tank are respectively connected with the first liquid pump and the third valve port;
the fourth circulation path comprises a condenser, a compressor and a second heat exchanger, the condenser, the compressor and the second heat exchanger are connected end to end in sequence, two ends of the second heat exchanger are respectively connected with the second expansion water tank and the third valve, and when the temperature of the battery is higher than the upper limit temperature of the battery, the battery is cooled through the fourth circulation path and the fan.
2. The system of claim 1, further comprising an electric heater.
3. A vehicle, characterized in that it comprises a control system of the battery temperature according to any one of claims 1 to 2.
4. A method of controlling the temperature of a battery, applied to the controller of the system of any one of claims 1 to 2, the method comprising:
acquiring the temperature of a battery;
controlling the first circulation passage to heat the battery by controlling the opening of a first valve port and a second valve port of the communication valve in response to the temperature of the battery being lower than a first threshold value and the temperature of liquid at an outlet of the first heat exchanger in the first circulation passage being higher than the temperature of the battery; wherein, through controlling the first valve port and the second valve port of the communication valve to open, control the first circulation passageway to heat the battery includes: responding to the fact that the outlet liquid temperature of the radiator is higher than the first liquid temperature, and cooling liquid passing through the radiator by natural wind by controlling the first on-off valve to be opened; or, cooling the liquid passing through the radiator by controlling the fan to be started; the second on-off valve, the first valve port and the second valve port are controlled to be opened, and cooled liquid in the third circulation passage is controlled to heat the battery;
when the temperature of the battery is higher than the upper limit temperature of the battery, the fan, the compressor, the electronic expansion valve and the first liquid pump are started, and the third valve port of the communication valve is opened, so that the battery is cooled through the fan and the fourth circulation passage.
5. The method according to claim 4, wherein after the controlling the first circulation path to heat the battery by controlling the opening of the first port and the second port of the communication valve, further comprises:
and controlling an electric heater to heat the battery in response to the temperature of the liquid for heating the battery in the first circulation passage being lower than the second liquid temperature.
6. A control device for battery temperature, characterized by being applied to a controller of the system according to any one of claims 1 to 2, the device comprising:
the temperature acquisition module is used for acquiring the temperature of the battery;
and the battery heating module is used for responding to the condition that the temperature of the battery is lower than a first threshold value and the temperature of liquid at the outlet of the first heat exchanger in the first circulation passage is higher than the temperature of the battery, and controlling the first circulation passage to heat the battery by controlling the opening of a first valve port and a second valve port of the communication valve.
7. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program, which is loaded and executed by a processor to implement the method of controlling the temperature of a battery as claimed in any one of the preceding claims 4 to 5.
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