CN109367438B - Battery thermal management system applied to hybrid electric vehicle type - Google Patents
Battery thermal management system applied to hybrid electric vehicle type Download PDFInfo
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- CN109367438B CN109367438B CN201811442766.XA CN201811442766A CN109367438B CN 109367438 B CN109367438 B CN 109367438B CN 201811442766 A CN201811442766 A CN 201811442766A CN 109367438 B CN109367438 B CN 109367438B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 165
- 239000003507 refrigerant Substances 0.000 claims abstract description 8
- 238000004378 air conditioning Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 19
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 3
- 102100029505 E3 ubiquitin-protein ligase TRIM33 Human genes 0.000 description 3
- 101000634991 Homo sapiens E3 ubiquitin-protein ligase TRIM33 Proteins 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Classifications
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- 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
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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
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
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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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Battery Mounting, Suspending (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a battery thermal management system applied to a hybrid electric vehicle type, which comprises: the water heater comprises an electric heater, an electronic water pump A, an electronic water pump B, a water temperature sensor A, a water temperature sensor B, a water temperature sensor C, a battery pack, a PEU, a battery cooler, an expansion water tank, a three-way valve A, a three-way valve B, a three-way valve C, a three-way valve D, a three-way electromagnetic valve a, a three-way electromagnetic valve B, a two-way electromagnetic valve, a warm air radiator integrated in an air conditioning box, an engine water jacket, a refrigerant loop connected with the battery cooler and a water pipe connected with each component. The invention realizes that the battery pack and the passenger cabin share one electric heater, meets the heating requirement of the battery pack and the passenger cabin by reasonably arranging the electromagnetic valves in a loop and adopting a better logic control mode, shortens the flow path to enable the target temperature to be faster and save the energy consumption of the electric compressor and the electric heater and improves the continuous voyage mileage of the whole vehicle because the circulating medium only exchanges heat with the electric heater or the cooler.
Description
Technical Field
The invention relates to the field of hybrid electric vehicle types, in particular to a battery thermal management system applied to a hybrid electric vehicle type.
Background
With increasing importance of people on environmental protection and global energy bulletin, each large vehicle enterprise is gradually enlarging the layout of new energy vehicles, and the new energy vehicles are increasingly appeared in our lives. Compared with a pure electric vehicle, the plug-in hybrid electric vehicle adopts two sets of power systems of a motor and an engine, so that the consumption of energy sources can be reduced, the driving performance is ensured not to be limited, and the plug-in hybrid electric vehicle is an ideal scheme for replacing the traditional internal combustion engine vehicle at present. The plug-in hybrid electric vehicle is characterized in that components such as a driving motor, a battery pack, a charger and the like are added on the basis of a traditional internal combustion engine vehicle, wherein the performance of the battery pack determines the driving performance, the safety and the service life of the plug-in hybrid electric vehicle. Under the general condition, the working temperature range of the battery pack is-20 ℃ to 50 ℃, when the temperature is higher than 50 ℃ or lower than-20 ℃, the battery pack limits the charging and discharging of current, so that the service life of the battery pack is prolonged, the potential safety hazard caused by high heat of the battery pack is avoided, and in addition, the cost of a vehicle is reduced, and a set of reasonable, efficient, stable and high-cost-performance battery pack thermal management system is required to be designed to ensure that the battery pack works in a reasonable working range.
At present, battery pack thermal management mainly comprises battery pack heating and battery pack cooling, wherein battery pack cooling modes mainly comprise air cooling and liquid cooling, and battery pack heating modes mainly comprise air heating and liquid heating. If CN 202413396U describes a cooling system (air-cooling and air-heating mode of a battery pack) for a power battery pack of a hybrid electric vehicle, the technical scheme conveys air in a passenger compartment to the inside of the battery pack through an air blower, and cools a battery module through air cooling, and the scheme can achieve the effect of cooling the battery pack, but there are some problems, such as the necessity of designing a complex air pipe system, noise problem of the air blower, influence of cooling the battery pack on cooling performance of the passenger compartment, slow preheating speed when the battery pack needs to be heated, and uneven temperature problem of the battery pack. In another example, CN 103287252A describes a thermal management system (a scheme of cooling a battery pack with water and heating fuel) of an electric vehicle, the scheme is composed of a natural cooling system, a forced cooling system and a preheating system of the battery, and the three systems are mutually switched through two three-way valves, so that the battery pack can be well cooled and preheated. However, the fuel oil heater used in the preheating system generally needs a special oil pump, a fuel delivery pipe, an air inlet pipe, an air filter element, an exhaust pipe and an exhaust silencer, so that the system has a complex structure and poor control stability. As another example, CN 106898841A describes a battery pack thermal management system (battery pack water-cooling water-heating scheme) of a hybrid electric vehicle, which adopts an independent electric heater circulation loop to heat the battery pack, and analyzes that the passenger cabin of the hybrid electric vehicle adopts other heating loop designs according to the loop principle, so that two sets of heating loops can increase the cost and weight of the whole vehicle; the battery cooler and the electric heater are connected in series in the same loop, so that the loop flow resistance is larger, a high-power electronic water pump is needed to be selected to provide larger lift and flow, in addition, when the battery pack needs to be cooled or heated, the battery cooler and the electric heater need to be cooled or heated, loop media are more, the time for reaching the target temperature is prolonged, the working time of the electric compressor or the electric heater is prolonged, the power consumption is increased, and the energy consumption and the endurance mileage of the whole car are influenced.
Disclosure of Invention
The invention aims to provide a battery thermal management system applied to a hybrid electric vehicle type, the circuit design of the battery thermal management system can avoid the defects in the prior art, the battery pack and a passenger cabin of the battery thermal management system share one electric heater, the battery pack and the passenger cabin can meet the heating requirement of the battery pack and the passenger cabin by reasonably arranging the electromagnetic valve in the circuit and adopting better logic control, the battery thermal management system has certain cost advantages, meanwhile, when the battery pack is heated or cooled, a circulating medium only exchanges heat with the electric heater or a cooler, the flowing way of the medium is shortened, the cooling or heating time of the medium is shorter, the target temperature can be reached more quickly, the battery pack can exert the maximum performance under different environmental working conditions, the service life of the battery pack is prolonged, the energy consumption of an electric compressor or the electric heater is saved, and the whole vehicle endurance mileage is improved.
The technical scheme adopted by the invention is as follows:
a battery thermal management system for a hybrid vehicle model, comprising: the system comprises an electric heater PTC, an electronic water pump A, an electronic water pump B, a water temperature sensor A, a water temperature sensor B, a water temperature sensor C, a battery pack, a PEU (comprising an OBC charger and a DCDC current converter), a battery cooler, an expansion water tank, a three-way valve A, a three-way valve B, a three-way valve C, a three-way valve D, a three-way electromagnetic valve a, a three-way electromagnetic valve B, a two-way electromagnetic valve, a warm air radiator integrated in an air conditioning box, an engine water jacket, a refrigerant loop connected with the battery cooler and a water pipe connected with all parts;
The outlet of the electronic water pump A is sequentially connected with the inlets of the water temperature sensor A, the electric heater PTC, the water temperature sensor B and the three-way valve B through water pipes, one outlet of the three-way valve B is connected with the inlet end ① of the three-way electromagnetic valve B through water pipes, the outlet end ② of the three-way electromagnetic valve B is sequentially connected with the inlets of the electronic water pump B, the water temperature sensor C, the battery pack, the PEU and the three-way valve C through water pipes, one outlet of the three-way valve C is sequentially connected with the inlets of the two-way electromagnetic valve and the three-way valve A through water pipes, and one outlet of the three-way valve A is connected with the inlet of the electronic water pump A through water pipes;
The other outlet of the three-way valve B is connected with the inlet of the three-way valve D through a water pipe way warm air radiator, two outlets of the three-way valve D are respectively connected with the inlet end ① of the three-way electromagnetic valve a and the inlet of the engine water jacket through a water pipe, the outlet of the engine water jacket is connected with the inlet end ③ of the three-way electromagnetic valve a through a water pipe, the outlet end ② of the three-way electromagnetic valve a is connected with one inlet of the three-way valve A through a water pipe, and the outlet of the three-way valve A is connected with the inlet of the electronic water pump A through a water pipe;
The other outlet of the three-way valve C is sequentially connected with an expansion water tank, a battery cooler and an inlet end ③ of a three-way electromagnetic valve b through a water pipe, wherein the battery cooler is connected into a refrigerant loop through an air conditioner pipeline;
the battery thermal management system applied to the hybrid electric vehicle type is characterized in that: the three-way electromagnetic valves a and b are two-in one-out three-way electromagnetic valves, when the three-way electromagnetic valves are electrified, the inlet end ① of the three-way electromagnetic valve is opened, the inlet end ③ of the three-way electromagnetic valve is closed, and the inlet end ① and the outlet end ② of the three-way electromagnetic valve are communicated; when the three-way solenoid valve is de-energized, the inlet end ① of the three-way solenoid valve is closed, the inlet end ③ is open, and the inlet end ③ and the outlet end ② are conductive.
The battery thermal management system applied to the hybrid electric vehicle type is characterized in that: the two-way electromagnetic valve is a normally open electromagnetic valve, namely, the two-way electromagnetic valve is not electrified to be opened, and the electrified state is closed.
The battery thermal management system applied to the hybrid electric vehicle type is characterized in that: the water temperature sensor A, B, C may be a separate component disposed in the circulation loop.
The battery thermal management system applied to the hybrid electric vehicle type is characterized in that: the water temperature sensors A, B, C can also be respectively integrated in other components, the water temperature sensor A is integrated in the electronic water pump A, the water temperature sensor B is integrated in the electric heater PTC, and the water temperature sensor C is integrated in the battery pack.
In summary, the beneficial effects of the invention are as follows:
the invention realizes that the battery pack and the passenger cabin of the battery thermal management system share one electric heater, and the battery pack and the passenger cabin are reasonably arranged in a loop through the electromagnetic valve and adopt a better logic control mode, so that the requirement of the battery pack and the passenger cabin on heating can be met, certain cost advantages are realized, meanwhile, when the battery pack is heated or cooled, the circulating medium only exchanges heat with the electric heater or the cooler, the flowing path of the medium is shortened, the cooling or heating time of the medium is shorter, the target temperature of the battery pack can be reached more quickly, the battery pack can exert the maximum performance under different environmental working conditions, the service life of the battery pack is prolonged, the plug-in hybrid electric vehicle can normally run under some extreme environmental working conditions, the energy consumption of the electric compressor or the electric heater is saved, and the range of the whole vehicle is improved.
Drawings
Fig. 1 is a schematic diagram of a battery thermal management system circuit design according to the present invention.
In the figure, 1, three-way valves D,2, an engine water jacket, 3, three-way electromagnetic valves a,4, three-way valves a,5, an electronic water pump a,6, a water temperature sensor a,7, an electric heater PTC,8, a water temperature sensor B,9, three-way valves B,10, a warm air radiator, 11, an expansion tank, 12, three-way valves C,13, PEU (including an OBC charger and a DCDC current converter), 14, a battery pack, 15, a water temperature sensor C,16, an electronic water pump B,17, three-way electromagnetic valves B,18, a battery cooler, 19, a refrigerant circuit, 20, and a two-way electromagnetic valve.
Detailed Description
As shown in fig. 1, a battery thermal management system applied to a hybrid vehicle type includes: the electric heater PTC7, the electronic water pump A5, the electronic water pump B16, the water temperature sensor A6, the water temperature sensor B8, the water temperature sensor C15, a battery pack 14, a PEU (including an OBC charger and a DCDC current converter) 13, a battery cooler 18, an expansion tank 11, a three-way valve A4, a three-way valve B9, a three-way valve C12, a three-way valve D1, a three-way electromagnetic valve a3, a three-way electromagnetic valve B17, a two-way electromagnetic valve 20, a warm air radiator 10 integrated in an air conditioner box, an engine water jacket 2, a refrigerant circuit 19 connected with the battery cooler 18 and a water pipe connecting all parts.
The outlet of the electronic water pump A5 is sequentially connected with the inlets of the water temperature sensor A6, the electric heater PTC7, the water temperature sensor B8 and the three-way valve B9 through a water pipe, one outlet of the three-way valve B9 is connected with the inlet end ① of the three-way electromagnetic valve B17 through a water pipe, the outlet end ② of the three-way electromagnetic valve B17 is sequentially connected with the inlets of the electronic water pump B16, the water temperature sensor C15, the battery pack 14, the PEU13 and the three-way valve C12 through a water pipe, one outlet of the three-way valve C12 is sequentially connected with the inlets of the two-way electromagnetic valve 20 and the three-way valve A4 through a water pipe, and one outlet of the three-way valve A4 is connected with the inlet of the electronic water pump A5 through a water pipe;
The other outlet of the three-way valve B9 is connected with the inlet of the three-way valve D1 through a water pipe through the warm air radiator 10, the two outlets of the three-way valve D1 are respectively connected with the inlet end ① of the three-way electromagnetic valve a3 and the inlet of the engine water jacket 2 through a water pipe, the outlet of the engine water jacket 2 is connected with the inlet end ③ of the three-way electromagnetic valve a3 through a water pipe, the outlet end ② of the three-way electromagnetic valve a3 is connected with one inlet of the three-way valve A4 through a water pipe, and the outlet of the three-way valve A4 is connected with the inlet of the electronic water pump A5 through a water pipe;
The other outlet of the three-way valve C12 is sequentially connected with the expansion water tank 11, the battery cooler 18 and the inlet end ③ of the three-way electromagnetic valve b17 through a water pipe, wherein the battery cooler 18 is connected into a refrigerant loop through an air-conditioning pipeline;
The three-way electromagnetic valve a3 and the three-way electromagnetic valve b17 are two-in and one-out three-way electromagnetic valves, when the three-way electromagnetic valves are electrified, the inlet end ① of the three-way electromagnetic valve is opened, the inlet end ③ of the three-way electromagnetic valve is closed, and the inlet end ① and the outlet end ② are communicated; when the three-way solenoid valve is de-energized, the inlet end ① of the three-way solenoid valve is closed, the inlet end ③ is open, and the inlet end ③ and the outlet end ② are conductive. The two-way solenoid valve 20 is a normally open solenoid valve, i.e. is not powered on and is powered off.
The water temperature sensor A6, the water temperature sensor B8, the water temperature sensor C15 may be independent components arranged in the circulation loop; the water temperature sensors A6, B8, C15 may also be integrated in other components, respectively, the water temperature sensor A6 is integrated in the electronic water pump A5, the water temperature sensor B8 is integrated in the electric heater PTC7, and the water temperature sensor C15 is integrated in the battery pack 14.
The working flow of the invention is as follows:
When the engine is not started when the battery pack needs to be heated, through an instruction sent by the HCU, the inlet ends ① of the three-way electromagnetic valve a and the three-way electromagnetic valve B in the loop are opened, the inlet end ③ is closed, the inlet end ① and the outlet end ② are communicated, the two electromagnetic valves are not electrified and opened, the electronic water pump A and the electronic water pump B start to operate, the electric heater PTC is electrified and started to work, the heated cooling liquid flows out of the electric heater PTC, is divided into two paths through the water temperature sensor B at the three-way valve B, one path flows into the three-way electromagnetic valve B, flows into the battery pack through the electronic water pump B and the water temperature sensor C to heat the battery pack, flows out of the battery pack, flows back to the electric heater PTC through the PEU, the three-way valve C, the two-way electromagnetic valves, the three-way valve A, the electronic water pump A and the water temperature sensor A, and circulates according to the paths after being heated by the electric heater PTC, until the temperature of the battery pack reaches the target temperature; the other path of the water flows into the warm air radiator from the three-way valve B, flows back to the electric heater PTC through the three-way valve D, the three-way electromagnetic valve a, the three-way valve A, the electronic water pump A and the water temperature sensor A, meanwhile, if the passenger cabin has heating requirements, hot water flowing into the warm air radiator finishes heat exchange through the warm air radiator to heat the passenger cabin, if the passenger cabin does not have the heating requirements, hot water does not exchange heat during circulation of the loop, the heating power of the electric heater PTC can be adjusted according to the requirements, and particularly, the heating power can be compared and judged according to the measured values of the water temperature sensor A and the water temperature sensor B arranged at the PTC water inlet and the water outlet, the water temperature sensor C of the water inlet of the battery pack and the temperature sensor of the battery pack, meanwhile, the flow of the electronic water pump A and the electronic water pump B in the loop can also be matched with the electric heater PTC, and finally, the heating power of the passenger cabin can be adjusted according to the temperature requirements of the battery pack or the heating requirements of the passenger cabin, and the requirements of the battery pack and the heating requirements of the passenger cabin can be met under the common actions of the electric heater and the PTC and the electronic water pump A, B.
When the battery pack does not need to be heated and only the passenger cabin has heating requirements, the electronic water pump B does not work, the electronic water pump A is started to run, the electric heater PTC starts to work, the electromagnetic valve B in the loop is powered off, the inlet end ① of the electromagnetic valve B is closed, hot water heated by the electric heater PTC does not flow into the battery pack, the three-way electromagnetic valve a can be selected according to whether the engine is started or not, when the engine is not started, the three-way electromagnetic valve a is selected to be electrified, the inlet end ③ of the three-way electromagnetic valve a is closed, the inlet end ① of the three-way electromagnetic valve a is opened to be communicated with the outlet end ②, so that the water in the water jacket of the engine is prevented from entering the circulation to increase heating medium, and therefore the work load and the heating temperature rise time of the electric heater PTC are increased; when the engine is started, in order to prevent hot water with higher temperature of the engine from flowing into the battery pack along the two electromagnetic valves from the three-way valve A, so that the two electromagnetic valves are electrified and closed by sending an instruction through the HCU, meanwhile, the three-way electromagnetic valve a is powered off, the inlet end ① of the three-way electromagnetic valve a is closed, the inlet end ③ is opened, the outlet end ② is communicated, the three-way electromagnetic valve B still keeps a powered-off state, hot water heated by the electric heater PTC flows into the warm air radiator only through the three-way valve B and then flows into the engine water jacket through the three-way valve D, and flows back to the electric heater PTC through the three-way electromagnetic valve a, the three-way valve A, the electronic water pump A and the water temperature sensor A after being converged with hot water of the engine water jacket.
When the temperature of the battery pack is too high and cooling is needed, the two solenoid valves are electrified and closed through an instruction sent by the HCU, the electronic water pump B is started to operate, the battery cooler is started to operate, the electronic water pump A does not operate, then cooling liquid cooled by the battery cooler flows into the battery pack through the three-way solenoid valve B (the inlet end ① of the three-way solenoid valve B is in a power-off state and the inlet end ③ of the three-way solenoid valve B is opened and is communicated with the outlet end ②), the electronic water pump B and the water temperature sensor C flow into the battery pack, heat of the battery pack is carried out from the water outlet of the battery pack and flows into the PEU, and because the two solenoid valves arranged between the three-way valve A and the three-way valve C are in an electrified and closed state at the moment, the cooling liquid after heat exchange flows into the expansion water tank through the three-way valve C and then enters the battery cooler to cool until the temperature of the battery pack reaches the target requirement, and the battery cooler and the electronic water pump B stops operating. Because the two-way electromagnetic valve is arranged between the three-way valve A and the three-way valve C in the loop, the two-way electromagnetic valve is in a closed state when the three-way valve A and the three-way valve C are electrified, when the battery needs to be cooled, if the engine works, hot water of the engine cannot flow into the battery pack cooling circulation loop through the three-way electromagnetic valve a, the three-way valve A and the two-way electromagnetic valve, and therefore normal operation of the battery pack cooling circulation loop is ensured.
Claims (4)
1. A battery thermal management system for a hybrid vehicle model, comprising: the system comprises an electric heater PTC, an electronic water pump A, an electronic water pump B, a water temperature sensor A, a water temperature sensor B, a water temperature sensor C, a battery pack, a PEU, a battery cooler, an expansion water tank, a three-way valve A, a three-way valve B, a three-way valve C, a three-way valve D, a three-way electromagnetic valve a, a three-way electromagnetic valve B, a two-way electromagnetic valve, a warm air radiator integrated in an air conditioning box, an engine water jacket, a refrigerant loop connected with the battery cooler and a water pipe connected with all parts;
The outlet of the electronic water pump A is sequentially connected with the inlets of the water temperature sensor A, the electric heater PTC, the water temperature sensor B and the three-way valve B through water pipes, one outlet of the three-way valve B is connected with the inlet end ① of the three-way electromagnetic valve B through water pipes, the outlet end ② of the three-way electromagnetic valve B is sequentially connected with the inlets of the electronic water pump B, the water temperature sensor C, the battery pack, the PEU and the three-way valve C through water pipes, one outlet of the three-way valve C is sequentially connected with the inlets of the two-way electromagnetic valve and the three-way valve A through water pipes, and one outlet of the three-way valve A is connected with the inlet of the electronic water pump A through water pipes;
The other outlet of the three-way valve B is connected with the inlet of the three-way valve D through a water pipe way warm air radiator, two outlets of the three-way valve D are respectively connected with the inlet end ① of the three-way electromagnetic valve a and the inlet of the engine water jacket through a water pipe, the outlet of the engine water jacket is connected with the inlet end ③ of the three-way electromagnetic valve a through a water pipe, the outlet end ② of the three-way electromagnetic valve a is connected with one inlet of the three-way valve A through a water pipe, and the outlet of the three-way valve A is connected with the inlet of the electronic water pump A through a water pipe;
The other outlet of the three-way valve C is sequentially connected with an expansion water tank, a battery cooler and an inlet end ③ of a three-way electromagnetic valve b through a water pipe, wherein the battery cooler is connected into a refrigerant loop through an air conditioner pipeline;
The three-way electromagnetic valve a and the three-way electromagnetic valve b are two-in three-way electromagnetic valves and one-out three-way electromagnetic valve b, when the three-way electromagnetic valve is electrified, the inlet end ① of the three-way electromagnetic valve is opened, the inlet end ③ of the three-way electromagnetic valve is closed, and the inlet end ① and the outlet end ② are communicated; when the three-way solenoid valve is de-energized, the inlet end ① of the three-way solenoid valve is closed, the inlet end ③ is open, and the inlet end ③ and the outlet end ② are conductive.
2. A battery thermal management system for use with a hybrid vehicle according to claim 1, wherein: the two-way electromagnetic valve is a normally open electromagnetic valve, namely, the two-way electromagnetic valve is not electrified to be opened, and the electrified state is closed.
3. A battery thermal management system for use with a hybrid vehicle according to claim 1, wherein: the water temperature sensor A, the water temperature sensor B and the water temperature sensor C are independent components and are arranged in the circulation loop.
4. A battery thermal management system for use with a hybrid vehicle according to claim 1, wherein: the water temperature sensor A is integrated in the electronic water pump A, the water temperature sensor B is integrated in the electric heater PTC, and the water temperature sensor C is integrated in the battery pack.
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