CN113696787B - Power battery heat dissipation method and device, computer equipment and storage medium - Google Patents

Power battery heat dissipation method and device, computer equipment and storage medium Download PDF

Info

Publication number
CN113696787B
CN113696787B CN202110922468.6A CN202110922468A CN113696787B CN 113696787 B CN113696787 B CN 113696787B CN 202110922468 A CN202110922468 A CN 202110922468A CN 113696787 B CN113696787 B CN 113696787B
Authority
CN
China
Prior art keywords
power battery
heat dissipation
acquiring
temperature
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110922468.6A
Other languages
Chinese (zh)
Other versions
CN113696787A (en
Inventor
胡金蕊
庄晓
徐善勇
陈存福
侯志华
王秀鹏
杨浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Jiefang Automotive Co Ltd
FAW Jiefang Qingdao Automobile Co Ltd
Original Assignee
FAW Jiefang Automotive Co Ltd
FAW Jiefang Qingdao Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAW Jiefang Automotive Co Ltd, FAW Jiefang Qingdao Automobile Co Ltd filed Critical FAW Jiefang Automotive Co Ltd
Priority to CN202110922468.6A priority Critical patent/CN113696787B/en
Publication of CN113696787A publication Critical patent/CN113696787A/en
Application granted granted Critical
Publication of CN113696787B publication Critical patent/CN113696787B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3216—Control means therefor for improving a change in operation duty of a compressor in a vehicle
    • 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
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3255—Cooling devices information from a variable is obtained related to temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3269—Cooling devices output of a control signal
    • B60H2001/327—Cooling devices output of a control signal related to a compressing unit
    • B60H2001/3272—Cooling devices output of a control signal related to a compressing unit to control the revolving speed of a compressor
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The application relates to a power battery heat dissipation method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring the temperature difference of the cooling liquid of the power battery; then, acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid; further acquiring the required refrigerant flow of the cab, and determining the total required refrigerant flow according to the required refrigerant flow of the cab and the required heat dissipation refrigerant flow; and finally, acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor. By adopting the method, the required flow of the heat dissipation refrigerant required by the power battery can be calculated by monitoring the temperature of the power battery, and then the required flow of the cab refrigerant required by cab temperature adjustment is obtained, so that the total required flow of the refrigerant is calculated, and finally the work of the compressor is controlled according to the total required flow of the refrigerant. The reliability of the vehicle-mounted power battery cooling system is improved.

Description

Power battery heat dissipation method and device, computer equipment and storage medium
Technical Field
The application relates to the technical field of vehicle control, in particular to a power battery heat dissipation method, a power battery heat dissipation device, computer equipment and a storage medium.
Background
With the development of automobile technology, the requirements for safety and reliability of automobiles are higher and higher. The automobile power battery has large working current and large heat generation quantity, and meanwhile, the battery pack is in a relatively closed environment, so that the temperature of the battery is increased. This is because the electrolyte in a lithium battery functions as a charge conducting element in the lithium battery, and a battery without the electrolyte is a battery that cannot be charged and discharged. At present, most of lithium batteries are composed of flammable and volatile non-aqueous solutions, and compared with batteries composed of aqueous solutions and electrolytes, the composition system has higher specific energy and voltage output and meets higher energy requirements of users. Since the nonaqueous electrolyte is inflammable and volatile, and is soaked in the battery, the non-aqueous electrolyte also forms a combustion source of the battery. Therefore, the working temperature of the two battery materials is not higher than 60 ℃, but the outdoor temperature is close to 40 ℃ at present, and the heat generated by the battery is large, so that the working environment temperature of the battery is increased, and the situation is very dangerous if thermal runaway occurs. To avoid becoming "barbecued," it is important to dissipate heat from the battery. The heat dissipation of the battery pack has two types, namely active and passive, and the efficiency of the battery pack is greatly different from that of the battery pack. The cost required by a passive system is lower, the adopted measures are simpler, but the heat dissipation efficiency is not high. Active systems are relatively complex in construction, require more additional power, are more costly to thermally manage, and are more efficient.
In the prior art, the problem of poor reliability of a heat dissipation system exists in the heat dissipation of a vehicle power battery.
Disclosure of Invention
In view of the above, it is necessary to provide a power battery heat dissipation method, a power battery heat dissipation apparatus, a computer device, and a storage medium, which can improve the reliability of power battery heat dissipation.
A method for dissipating heat from a power battery, the method comprising:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the method comprises the steps of obtaining the required flow of a cab coolant, and determining the total required flow of the coolant according to the required flow of the cab coolant and the required flow of a heat dissipation coolant;
and acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor.
In one embodiment, acquiring the temperature difference of the power battery cooling liquid comprises the following steps:
acquiring the water outlet temperature and the water inlet temperature of the power battery;
and acquiring the temperature difference of the cooling liquid of the power battery according to the difference value of the temperature of the water outlet and the temperature of the water inlet.
In one embodiment, obtaining a required flow rate of a cooling refrigerant according to a temperature difference of a cooling liquid of a power battery includes:
acquiring basic demand flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery;
acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator;
and obtaining the required flow of the heat dissipation refrigerant according to the basic required flow and the required flow correction coefficient of the heat dissipation refrigerant.
In one embodiment, the acquiring of the required flow rate of the coolant in the cab comprises:
and acquiring the required flow of the refrigerant of the cab according to the on-off state of the air conditioner and the refrigeration gear of the air conditioner.
In one embodiment, obtaining the rotation speed of the compressor according to the total refrigerant demand flow includes:
acquiring the current heat dissipation state of the power battery, wherein the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state;
and acquiring the rotating speed of the compressor according to the heat dissipation state and the total required flow of the refrigerant.
In one embodiment, acquiring the current heat dissipation state of the power battery comprises:
acquiring gear information, vehicle speed and power battery temperature;
if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in a normal heat dissipation state;
and if the gear information is neutral, the vehicle speed is lower than the vehicle speed threshold value and the temperature of the power battery is higher than a second temperature threshold value, the power battery is in a degraded heat dissipation state.
In one embodiment, the obtaining of the rotation speed of the compressor according to the heat dissipation state and the total refrigerant demand flow includes:
if the power battery is in a normal heat dissipation state, acquiring the corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model;
if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed and the rotating speed correction coefficient of the compressor.
A power battery heat sink, the device comprising:
the temperature difference acquisition module is used for acquiring the temperature difference of the cooling liquid of the power battery;
the heat dissipation flow acquisition module is used for acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the total flow acquisition module is used for acquiring the required refrigerant flow of the cab and acquiring the total required refrigerant flow according to the sum of the required refrigerant flow of the cab and the required heat dissipation refrigerant flow;
and the rotating speed control module is used for acquiring the rotating speed of the compressor according to the total refrigerant demand flow and controlling the compressor to work according to the rotating speed of the compressor.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the method comprises the steps of obtaining the required flow of a cab coolant, and determining the total required flow of the coolant according to the required flow of the cab coolant and the required flow of a heat dissipation coolant;
and acquiring the rotating speed of the compressor according to the total refrigerant demand flow, and controlling the compressor to work according to the rotating speed of the compressor.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the method comprises the steps of obtaining the required flow of a cab coolant, and determining the total required flow of the coolant according to the required flow of the cab coolant and the required flow of a heat dissipation coolant;
and acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor.
The power battery cooling method, the power battery cooling device, the computer equipment and the storage medium acquire the temperature difference of the power battery cooling liquid; then, acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid; further acquiring the required refrigerant flow of the cab, and determining the total required refrigerant flow according to the required refrigerant flow of the cab and the required heat dissipation refrigerant flow; and finally, acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor. By monitoring the temperature of the power battery, the required heat dissipation refrigerant demand flow of the power battery is calculated, and the required cab refrigerant demand flow for cab temperature adjustment is obtained, so that the total refrigerant demand flow is calculated, and finally, the work of the compressor is controlled according to the total refrigerant demand flow. The reliability of the vehicle-mounted power battery heat dissipation system can be improved.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for dissipating heat from a power battery according to an embodiment;
FIG. 2 is a schematic diagram of a process for obtaining a temperature difference between cooling fluids of a power battery according to an embodiment;
fig. 3 is a schematic flow chart illustrating the process of obtaining the required flow rate of the cooling medium in one embodiment;
FIG. 4 is a graph showing a relationship between a refrigerant demand and a rotational speed of a compressor according to an embodiment;
FIG. 5 is a block diagram of a heat sink of a power battery according to an embodiment;
FIG. 6 is a diagram of the internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
In one embodiment, as shown in fig. 1, a power battery heat dissipation method is provided, and this embodiment is exemplified by applying this method to a planetary hybrid system, it is understood that this method may also be applied to a power battery cooling system, and may also be applied to a vehicle control system including a planetary hybrid system and a power battery cooling system, and is implemented through interaction of the planetary hybrid system and the power battery cooling system. In this embodiment, the method includes the steps of:
and 102, acquiring the temperature difference of the cooling liquid of the power battery.
The power battery is a power supply for providing a power source for tools, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. The power battery generally includes a power battery cooling system that dissipates heat to the power battery by circulating power battery coolant.
Specifically, the temperature difference of the cooling liquid of the power battery is obtained according to the difference value of the temperature of the water outlet and the temperature of the water inlet of the cooling system of the power battery.
And 104, acquiring the required flow of the heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery.
The required flow of the heat dissipation refrigerant refers to the flow of the refrigerant required by the heat dissipation of the power battery.
Specifically, basic demand flow of a heat dissipation refrigerant is obtained according to the temperature difference of cooling liquid of the power battery, then a demand flow correction coefficient is obtained according to the temperature and the pressure of an evaporator of the power battery in the current cooling system of the power battery, and finally the demand flow of the heat dissipation refrigerant is obtained according to the basic demand flow and the demand flow correction coefficient of the heat dissipation refrigerant.
And 106, acquiring the required refrigerant flow of the cab, and determining the total required refrigerant flow according to the required refrigerant flow of the cab and the required heat dissipation refrigerant flow.
The required flow of the coolant in the cab refers to the flow of the coolant required by the temperature regulation of the automobile cab.
Specifically, under the general condition, the automobile cab carries out temperature regulation through the air conditioner, can obtain driver's cabin refrigerant demand flow according to air conditioner on-off state and air conditioner refrigeration gear, then obtains the total demand flow of refrigerant according to the sum calculation of driver's cabin refrigerant demand flow and heat dissipation refrigerant demand flow.
And 108, acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor.
The compressor is an important component in a power battery cooling system, is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is a heart of the cooling system. The compressor sucks low-temperature and low-pressure refrigerant gas from the air suction pipe, drives the piston to compress the refrigerant gas through the operation of the motor, and then discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle, so that the refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption) is realized.
Specifically, the current heat dissipation state of the power battery is judged, the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state, then the rotating speed of the compressor is obtained according to the heat dissipation state, the total refrigerant demand flow and the current model of the compressor, and finally the compressor is controlled to work according to the rotating speed of the compressor.
In the heat dissipation method of the power battery, the temperature difference of the cooling liquid of the power battery is obtained; then, acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery; further acquiring the required refrigerant flow of the cab, and determining the total required refrigerant flow according to the required refrigerant flow of the cab and the required heat dissipation refrigerant flow; and finally, acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor. By monitoring the temperature of the power battery, the required heat dissipation refrigerant demand flow of the power battery is calculated, and the required cab refrigerant demand flow for cab temperature adjustment is obtained, so that the total refrigerant demand flow is calculated, and finally, the work of the compressor is controlled according to the total refrigerant demand flow. The reliability of the vehicle-mounted power battery cooling system can be improved.
In one embodiment, as shown in fig. 2, obtaining the power battery coolant temperature difference includes:
step 202, acquiring the water outlet temperature and the water inlet temperature of the power battery.
Specifically, the temperature of cooling liquid at a water outlet of a power battery cooling system is monitored through a temperature sensor to obtain the temperature of the water outlet of the power battery; and monitoring the temperature of the cooling liquid at the water inlet of the power battery cooling system through a temperature sensor to obtain the temperature of the water inlet of the power battery.
And step 204, acquiring the temperature difference of the cooling liquid of the power battery according to the difference value of the water outlet temperature and the water inlet temperature.
Specifically, the temperature difference of the cooling liquid of the power battery is obtained by reducing the temperature of the water outlet and the temperature of the water inlet.
The temperature difference of the cooling liquid is calculated through the temperature of the water outlet and the temperature of the water inlet of the power battery, and the calculation is simple and convenient.
In one embodiment, as shown in fig. 3, obtaining the required flow rate of the heat dissipation refrigerant according to the temperature difference of the power battery coolant includes:
and 302, acquiring basic required flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery.
Specifically, according to a refrigerant flow curve of a currently used refrigerant, the corresponding basic demand flow of the heat dissipation refrigerant is obtained through the temperature difference of the power battery coolant.
And step 304, acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator.
The evaporator is an important part in a power battery cooling system, and low-temperature condensed liquid is subjected to heat exchange with external air through the evaporator, gasified and absorbs heat, so that the refrigerating effect is achieved. The evaporator mainly comprises a heating chamber and an evaporation chamber, wherein the heating chamber provides heat required by evaporation for liquid to promote the liquid to boil and vaporize, and the evaporation chamber enables gas and liquid phases to be completely separated.
Specifically, the required flow correction coefficient is determined according to the temperature and the pressure of the power battery evaporator in consideration of the characteristics of different power battery cooling systems.
And step 306, obtaining the required flow of the heat dissipation refrigerant according to the basic required flow and the required flow correction coefficient of the heat dissipation refrigerant.
Specifically, the basic demand flow of the heat dissipation refrigerant is multiplied by the demand flow correction coefficient to obtain the demand flow of the heat dissipation refrigerant.
In the embodiment, the basic demand flow of the heat dissipation refrigerant is obtained according to the temperature difference of the cooling liquid of the power battery, the demand flow correction coefficient is obtained according to the temperature and the pressure of the evaporator of the power battery, and the demand flow of the heat dissipation refrigerant is obtained according to the basic demand flow of the heat dissipation refrigerant and the demand flow correction coefficient. The accurate heat dissipation refrigerant demand flow can be obtained according to the temperature difference of the cooling liquid of the power battery, and the purpose of improving the reliability of the vehicle-mounted power battery heat dissipation system is achieved.
In one embodiment, obtaining the required flow rate of the coolant in the cab comprises: and acquiring the required flow of the refrigerant of the cab according to the on-off state of the air conditioner and the refrigeration gear of the air conditioner.
Specifically, if an air conditioner switch in the cab is turned on, the air conditioner refrigerant demand flow is calculated according to the air conditioner refrigeration gear and the related parameters of the air conditioner, and under a normal condition, the air conditioner refrigerant demand flow is also the cab refrigerant demand flow.
In one embodiment, obtaining the rotation speed of the compressor according to the total refrigerant demand flow includes: acquiring the current heat dissipation state of the power battery, wherein the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state; and acquiring the rotating speed of the compressor according to the heat dissipation state and the total required flow of the refrigerant.
Specifically, whether the power battery is in a normal heat dissipation state or a degraded heat dissipation state at present is judged, the normal heat dissipation state refers to a state of the power battery when the vehicle is in normal operation, and the degraded heat dissipation state refers to a state of the power battery when the vehicle is in low-speed operation or neutral. The method comprises the steps that different heat dissipation states are different in the mode of calculating the rotating speed of the compressor, the rotating speed of the compressor is calculated according to the total refrigerant demand flow and the current compressor model in the normal heat dissipation state, and the rotating speed of the compressor is calculated according to the total refrigerant demand flow, the current compressor model and the highest temperature of a power battery in the degraded heat dissipation state.
In one embodiment, acquiring the current heat dissipation state of the power battery comprises: acquiring gear information, vehicle speed and power battery temperature; if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in a normal heat dissipation state; and if the gear information is neutral, the vehicle speed is lower than the vehicle speed threshold value and the temperature of the power battery is higher than a second temperature threshold value, the power battery is in a degraded heat dissipation state.
Specifically, the first temperature threshold may be set to 30 ℃, the second temperature threshold may be set to 35 ℃, and the vehicle speed threshold may be set to 3km/h (kilometers per hour). Acquiring gear information, vehicle speed and power battery temperature, and if the gear of the vehicle is not in neutral and the power battery temperature is more than 30 ℃, enabling the power battery to be in a normal heat dissipation state; and if the vehicle gear is in a neutral gear, the vehicle speed is lower than 3km/h and the temperature of the power battery is higher than 35 ℃, the power battery is in a degraded heat dissipation state.
In one embodiment, obtaining the rotation speed of the compressor according to the heat dissipation state and the total refrigerant demand flow includes: if the power battery is in a normal heat dissipation state, acquiring the corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model; if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed of the compressor and the rotating speed correction coefficient.
Specifically, if the power battery is in a normal heat dissipation state, the corresponding compressor rotation speed is obtained from the total refrigerant demand flow according to the relationship curve between the refrigerant demand and the compressor rotation speed of the current compressor model as shown in fig. 4, the abscissa represents the compressor rotation speed in rpm (revolutions per minute), the ordinate represents the refrigerant flow, and the unit is Q (volume flow), and may also be converted to L/min (liters per minute). If the power battery is in a degraded heat dissipation state, according to a relation curve between the refrigerant demand of the current compressor model and the compressor rotating speed as shown in fig. 4, the corresponding compressor basic rotating speed is obtained according to the total refrigerant demand flow, then the highest temperature of the power battery is obtained, a rotating speed correction coefficient is determined according to the highest temperature of the power battery and the current compressor model, and finally the compressor rotating speed is obtained by multiplying the compressor basic rotating speed and the rotating speed correction coefficient.
In the embodiment, if the power battery is in a normal heat dissipation state, the corresponding compressor rotating speed is obtained according to the total refrigerant demand flow and the current compressor model; if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed and the rotating speed correction coefficient of the compressor. The accurate rotating speed of the compressor can be obtained according to different states of the power battery, and the purpose of improving the reliability of the vehicle-mounted power battery cooling system is achieved.
In one embodiment, a method for dissipating heat of a power battery, taking a cooling system of a power battery as an example, includes: driven by powerTemperature T of battery water outlet out =30 ℃ and power battery water inlet temperature T in Calculating the temperature difference T of the cooling liquid of the power battery at the temperature of =15 DEG C Δ ＝T out -T in =30-15=15 ℃. By the temperature difference T of the power battery cooling liquid Δ =15 ℃, and the basic demand flow Q of the heat dissipation refrigerant is calculated by interpolation according to the refrigerant flow curve b And 10L/min. By power battery evaporator temperature T z =4 ℃ and pressure P z =0.3Mpa, and a required flow correction coefficient eta is calculated by interpolation according to the correction coefficient MAP of the current power battery model 0 =0.9. Battery heat dissipation demand flow Q b =10L/min and flow correction coefficient η 0 =0.9, calculating the heat radiation refrigerant demand flow Q 1 ＝Q b ×η 0 =10 × 0.9=9l/min. Calculating the required flow Q of the refrigerant in the cab according to the current on-off state of the air conditioner in the cab and the refrigeration gear of the air conditioner 2 And =3L/min. According to the required flow Q of the heat dissipation refrigerant 1 And the required flow rate Q of the coolant in the cab 2 The sum of (a) and (b), and obtaining the total refrigerant demand flow Q =9+3=12L/min.
Further, judging the heat dissipation state of the power battery, and if the vehicle is not in neutral and the temperature of the battery is more than 30 ℃, enabling the battery to be in a normal heat dissipation state; and if the vehicle is in a neutral gear, the speed of the vehicle is lower than 3km/h, and the temperature of the battery is higher than 35 ℃, the battery is in a degraded heat dissipation state. If the power battery is in a normal heat dissipation state, interpolating according to a relation curve of refrigerant demand and compressor rotating speed by using total refrigerant demand flow Q =12L/min to obtain the compressor rotating speed N =2500rpm in the normal heat dissipation state; if the power battery is in a degraded heat dissipation state, the maximum temperature T of the power battery is used max =36 ℃, and the rotating speed correction coefficient eta is obtained by interpolation calculation of the current compressor model 1 =0.85, and the compressor rotation speed N of the degraded heat dissipation state is obtained dec ＝N×η 1 ＝2500× 0.85＝2125rpm。
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least some of the steps in fig. 1-3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 5, there is provided a power battery heat sink 500 comprising: a temperature difference obtaining module 501, a heat dissipation flow obtaining module 502, a total flow obtaining module 503, and a rotation speed control module 504, wherein:
the temperature difference acquisition module 501 is used for acquiring the temperature difference of the cooling liquid of the power battery;
a heat dissipation flow obtaining module 502, configured to obtain a required flow of a heat dissipation refrigerant according to a temperature difference of the power battery coolant;
the total flow obtaining module 503 is configured to obtain a required coolant flow rate of the cab, and obtain a total coolant required flow rate according to a sum of the required coolant flow rate of the cab and the required coolant flow rate of the heat dissipation;
and the rotating speed control module 504 is configured to obtain a rotating speed of the compressor according to the total refrigerant demand flow, and control the compressor to work according to the rotating speed of the compressor.
In one embodiment, the temperature difference obtaining module 501 is further configured to obtain a water outlet temperature and a water inlet temperature of the power battery, and obtain a temperature difference of the cooling liquid of the power battery according to a difference between the water outlet temperature and the water inlet temperature.
In one embodiment, the heat dissipation flow obtaining module 502 includes:
and the basic demand flow acquisition submodule is used for acquiring the basic demand flow of the heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery.
And the flow correction coefficient acquisition submodule is used for acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator.
And the refrigerant demand flow acquisition submodule is used for acquiring the heat dissipation refrigerant demand flow according to the heat dissipation refrigerant basic demand flow and the demand flow correction coefficient.
In one embodiment, the total flow obtaining module 503 is further configured to obtain a required flow rate of the coolant in the cab according to an air conditioner on-off state and an air conditioner cooling gear.
In one embodiment, the speed control module 504 includes:
and the heat dissipation state judgment submodule is used for acquiring the current heat dissipation state of the power battery, and the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state.
And the compressor rotating speed acquisition submodule is used for acquiring the rotating speed of the compressor according to the heat dissipation state and the total refrigerant demand flow.
In one embodiment, the heat dissipation state determination submodule is further used for acquiring gear information, vehicle speed and power battery temperature; if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in a normal heat dissipation state; and if the gear information is a neutral gear, the vehicle speed is lower than the vehicle speed threshold value and the temperature of the power battery is higher than a second temperature threshold value, the power battery is in a degraded heat dissipation state.
In one embodiment, the compressor rotation speed obtaining submodule is further configured to obtain a corresponding compressor rotation speed according to the total refrigerant demand flow and the current compressor model if the power battery is in a normal heat dissipation state; if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed and the rotating speed correction coefficient of the compressor.
For specific limitations of the power battery heat dissipation device, reference may be made to the above limitations on the power battery heat dissipation method, and details are not repeated here. All or part of each module in the power battery heat dissipation device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 6. The computer device comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to realize a power battery heat dissipation method. The display screen of the computer equipment can be a vehicle-mounted liquid crystal display screen or a display screen connected with a vehicle control system, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged in a vehicle cab, an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the configuration shown in fig. 6 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory having a computer program stored therein and a processor that when executing the computer program performs the steps of:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
acquiring the required refrigerant flow of a cab, and determining the total required refrigerant flow according to the required refrigerant flow of the cab and the required heat dissipation refrigerant flow;
and acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the water outlet temperature and the water inlet temperature of the power battery;
and acquiring the temperature difference of the cooling liquid of the power battery according to the difference value of the temperature of the water outlet and the temperature of the water inlet.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring basic demand flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery;
acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator;
and obtaining the required flow of the heat dissipation refrigerant according to the basic required flow and the required flow correction coefficient of the heat dissipation refrigerant.
In one embodiment, the processor when executing the computer program further performs the steps of:
and acquiring the required flow of the refrigerant of the cab according to the on-off state of the air conditioner and the refrigeration gear of the air conditioner.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the current heat dissipation state of the power battery, wherein the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state;
and acquiring the rotating speed of the compressor according to the heat dissipation state and the total refrigerant demand flow.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring gear information, vehicle speed and power battery temperature;
if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in a normal heat dissipation state;
and if the gear information is neutral, the vehicle speed is lower than the vehicle speed threshold value and the temperature of the power battery is higher than a second temperature threshold value, the power battery is in a degraded heat dissipation state.
In one embodiment, the processor when executing the computer program further performs the steps of:
if the power battery is in a normal heat dissipation state, acquiring a corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model;
if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed and the rotating speed correction coefficient of the compressor.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery;
the method comprises the steps of obtaining the required flow of a cab coolant, and determining the total required flow of the coolant according to the required flow of the cab coolant and the required flow of a heat dissipation coolant;
and acquiring the rotating speed of the compressor according to the total required flow of the refrigerant, and controlling the compressor to work according to the rotating speed of the compressor.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the water outlet temperature and the water inlet temperature of the power battery;
and acquiring the temperature difference of the cooling liquid of the power battery according to the difference value of the temperature of the water outlet and the temperature of the water inlet.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring basic demand flow of a heat dissipation refrigerant according to the temperature difference of the cooling liquid of the power battery;
acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator;
and obtaining the required flow of the heat dissipation refrigerant according to the basic required flow and the required flow correction coefficient of the heat dissipation refrigerant.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and acquiring the required flow of the coolant in the cab according to the on-off state of the air conditioner and the refrigeration gear of the air conditioner.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the current heat dissipation state of the power battery, wherein the heat dissipation state comprises a normal heat dissipation state and a degraded heat dissipation state;
and acquiring the rotating speed of the compressor according to the heat dissipation state and the total required flow of the refrigerant.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring gear information, vehicle speed and power battery temperature;
if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in a normal heat dissipation state;
and if the gear information is neutral, the vehicle speed is lower than the vehicle speed threshold value and the temperature of the power battery is higher than a second temperature threshold value, the power battery is in a degraded heat dissipation state.
In one embodiment, the computer program when executed by the processor further performs the steps of:
if the power battery is in a normal heat dissipation state, acquiring the corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model;
if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of the power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; and obtaining the rotating speed of the compressor according to the basic rotating speed of the compressor and the rotating speed correction coefficient.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A heat dissipation method for a power battery is characterized by comprising the following steps:
acquiring the temperature difference of the cooling liquid of the power battery;
acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the method comprises the steps of obtaining the required flow of a cab coolant, and determining the total required flow of the coolant according to the required flow of the cab coolant and the required flow of the heat dissipation coolant;
acquiring the current heat dissipation state of the power battery; if the power battery is in a normal heat dissipation state, acquiring the corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model; if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of a power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; obtaining the rotating speed of the compressor according to the basic rotating speed of the compressor and the rotating speed correction coefficient; and controlling the compressor to work according to the rotating speed of the compressor.
2. The method of claim 1, wherein obtaining the power cell coolant temperature differential comprises:
acquiring the water outlet temperature and the water inlet temperature of the power battery;
and acquiring the temperature difference of the cooling liquid of the power battery according to the difference value of the water outlet temperature and the water inlet temperature.
3. The method according to claim 1, wherein the obtaining a required flow rate of a cooling refrigerant according to the temperature difference of the power battery cooling liquid comprises:
acquiring basic demand flow of a heat dissipation refrigerant according to the temperature difference of the power battery coolant;
acquiring a required flow correction coefficient according to the temperature and the pressure of the power battery evaporator;
and obtaining the heat dissipation refrigerant demand flow according to the heat dissipation refrigerant basic demand flow and the demand flow correction coefficient.
4. The method of claim 1, wherein the obtaining of the cab coolant demand flow comprises:
and acquiring the required flow of the coolant in the cab according to the on-off state of the air conditioner and the refrigeration gear of the air conditioner.
5. The method according to claim 1, wherein the obtaining the current heat dissipation state of the power battery comprises:
acquiring gear information, vehicle speed and power battery temperature;
if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in the normal heat dissipation state;
and if the gear information is a neutral gear, the vehicle speed is lower than a vehicle speed threshold value and the temperature of the power battery is greater than a second temperature threshold value, the power battery is in the degraded heat dissipation state.
6. A power battery heat sink, the device comprising:
the temperature difference acquisition module is used for acquiring the temperature difference of the cooling liquid of the power battery;
the heat dissipation flow acquisition module is used for acquiring the required flow of a heat dissipation refrigerant according to the temperature difference of the power battery cooling liquid;
the total flow acquiring module is used for acquiring the required flow of the coolant of the cab and acquiring the total required flow of the coolant according to the sum of the required flow of the coolant of the cab and the required flow of the heat dissipation coolant;
the rotating speed control module is used for acquiring the current heat dissipation state of the power battery; if the power battery is in a normal heat dissipation state, acquiring a corresponding compressor rotating speed according to the total refrigerant demand flow and the current compressor model; if the power battery is in a degraded heat dissipation state, acquiring a corresponding basic rotating speed of the compressor according to the total required flow of the refrigerant and the current model of the compressor; acquiring the highest temperature of a power battery, and acquiring a rotating speed correction coefficient according to the highest temperature of the power battery and the current compressor model; obtaining the rotating speed of the compressor according to the basic rotating speed of the compressor and the rotating speed correction coefficient; and controlling the compressor to work according to the rotating speed of the compressor.
7. The device of claim 6, wherein the heat dissipation flow obtaining module is further configured to obtain a required flow of the coolant in the cab according to an air conditioner on-off state and an air conditioner refrigeration gear.
8. The device of claim 6, wherein the rotation speed control module is further configured to obtain gear information, vehicle speed and power battery temperature; if the gear information is not neutral and the temperature of the power battery is greater than a first temperature threshold value, the power battery is in the normal heat dissipation state; and if the gear information is neutral, the vehicle speed is lower than a vehicle speed threshold value, and the temperature of the power battery is greater than a second temperature threshold value, the power battery is in the degraded heat dissipation state.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
CN202110922468.6A 2021-08-12 2021-08-12 Power battery heat dissipation method and device, computer equipment and storage medium Active CN113696787B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110922468.6A CN113696787B (en) 2021-08-12 2021-08-12 Power battery heat dissipation method and device, computer equipment and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110922468.6A CN113696787B (en) 2021-08-12 2021-08-12 Power battery heat dissipation method and device, computer equipment and storage medium

Publications (2)

Publication Number Publication Date
CN113696787A CN113696787A (en) 2021-11-26
CN113696787B true CN113696787B (en) 2023-02-17

Family

ID=78652374

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110922468.6A Active CN113696787B (en) 2021-08-12 2021-08-12 Power battery heat dissipation method and device, computer equipment and storage medium

Country Status (1)

Country Link
CN (1) CN113696787B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114374025A (en) * 2021-12-03 2022-04-19 东风柳州汽车有限公司 Method, device and system for controlling cooling medium and cooling liquid for cooling power battery
CN114683807B (en) * 2022-05-13 2024-05-07 安徽华菱汽车有限公司 Cooling control method, device and medium
CN117673579B (en) * 2024-02-01 2024-04-09 深圳联钜自控科技有限公司 Battery temperature control method, device, equipment and storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102496747A (en) * 2011-11-18 2012-06-13 中国检验检疫科学研究院 Thermal management device for power batteries and thermal management method for power batteries
CN109028676A (en) * 2018-05-29 2018-12-18 浙江吉利控股集团有限公司 A kind of control method of the motor compressor of new-energy automobile, apparatus and system
CN109599632A (en) * 2017-09-30 2019-04-09 比亚迪股份有限公司 The temperature control method and humidity control system of on-vehicle battery
CN109910591A (en) * 2019-04-12 2019-06-21 重庆市大明汽车电器有限公司 A kind of automotive thermal tube reason system and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190176578A1 (en) * 2017-12-08 2019-06-13 Ford Global Technologies, Llc Electric compressor speed control for battery chiller in electrified vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102496747A (en) * 2011-11-18 2012-06-13 中国检验检疫科学研究院 Thermal management device for power batteries and thermal management method for power batteries
CN109599632A (en) * 2017-09-30 2019-04-09 比亚迪股份有限公司 The temperature control method and humidity control system of on-vehicle battery
CN109028676A (en) * 2018-05-29 2018-12-18 浙江吉利控股集团有限公司 A kind of control method of the motor compressor of new-energy automobile, apparatus and system
CN109910591A (en) * 2019-04-12 2019-06-21 重庆市大明汽车电器有限公司 A kind of automotive thermal tube reason system and method

Also Published As

Publication number Publication date
CN113696787A (en) 2021-11-26

Similar Documents

Publication Publication Date Title
CN113696787B (en) Power battery heat dissipation method and device, computer equipment and storage medium
Hamut et al. Exergy analysis of a TMS (thermal management system) for range-extended EVs (electric vehicles)
CN110600831B (en) Temperature control method and system for battery pack, electronic device and storage medium
US20180222286A1 (en) Method to heat the cabin while cooling the battery during fast charge
US20130164573A1 (en) Rechargeable energy storage system thermal conditioning using ress state of charge
CN108116192B (en) Thermal management system and thermal management method of extended-range electric vehicle
US9618242B2 (en) Method for controlling a thermal storage heat pump system
CN109899122B (en) Control method of exhaust gas waste heat recovery system of marine engine
US8589024B2 (en) Thermal conditioning of rechargeable energy storage systems of vehicles
EP2459858A1 (en) Thermal management system, vehicle, and associated method
CN111347939A (en) Vehicle and power battery temperature control device thereof
CN112072857B (en) New energy automobile motor cooling system control method and device and new energy automobile
CN111361391A (en) New energy automobile integrated heat management unit and control method thereof
CN113002292A (en) Active air inlet grille control method and device, vehicle control unit and new energy automobile
JP5544193B2 (en) Waste heat regeneration system
Guo et al. A novel thermal management system with a heat-peak regulator for fuel cell vehicles
CN112440661A (en) Thermal management system for vehicle
US9211790B2 (en) Rechargeable energy storage system cooling
JP4382584B2 (en) Cooling device and vehicle equipped with the same
CN103625266A (en) Electric vehicle power unit cooling system
CN104953203A (en) Calculating method of rotary speed of fan in power battery for hybrid electric vehicle
CN114750649A (en) Pure electric vehicle battery heating method and device, computer equipment and storage medium
Huang et al. Unmanned autonomous ground hybrid vehicle thermal management system: design and control
CN114312471A (en) Thermal management method and system for power battery of extended-range vehicle and storage medium
CN209780980U (en) Exhaust waste heat recovery system of marine engine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant