A new energy-saving vehicle thermal management system and implementation method

Abstract

The application discloses a novel energy-saving whole vehicle thermal management system and an implementation method, and belongs to the whole vehicle thermal management field of new energy vehicles. The system comprises a heat dissipation water circuit, a heat pump system water circuit, a heater water circuit, an air conditioner water circuit and a battery heat exchange water circuit. The system has the following advantages: the heat pump system is combined, cooling liquid is used for refrigeration and heating, the heat pump system, the heater, the water pump and the valve are combined for use, multiple systems are combined and multiple working modes are realized, the energy consumption in the working process of the whole vehicle thermal management system is reduced, the heating efficiency of the system in a low-temperature environment is improved, and the electric energy of the battery is saved.

Description

TECHNICAL FIELD

[0001] The application is a new energy-saving whole vehicle thermal management system and implementation method, and particularly relates to the field of new energy vehicle whole vehicle thermal management. BACKGROUND

[0002] The existing new energy vehicle thermal management system mainly includes: a passenger compartment temperature control system, which meets the demand for passenger compartment refrigeration and heating; a battery thermal management system, which maintains the appropriate working temperature of the battery during charging and discharging; and a motor cooling system, which maintains the temperature of the motor control during use.

[0003] The passenger compartment temperature control system: under the condition of requiring refrigeration, the electric compressor works to compress the low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, which is then released to the outside environment by the electronic fan through the condenser, and the high-temperature and high-pressure gaseous refrigerant is changed into medium-temperature and high-pressure gaseous refrigerant, which is then changed into low-temperature and low-pressure liquid refrigerant through the passenger compartment side electronic expansion valve, and the low-temperature and low-pressure liquid refrigerant exchanges heat with the surrounding air through the evaporator to absorb the heat of the surrounding air, and then the air cooled by the air blower is blown into the passenger compartment to produce a refrigeration effect; under the condition of requiring heating, the passenger compartment PTC runs to heat the surrounding air, and then the heated air is blown into the passenger compartment by the air blower to produce a heating effect.

[0004] The battery thermal management system: under the condition of requiring refrigeration, the battery works basically the same as the passenger compartment temperature control system, and the difference is that the low-temperature and low-pressure liquid refrigerant exchanges heat with the cooling liquid driven by the water pump through the battery chiller to reduce the temperature of the cooling liquid, and then the cooling liquid cools the battery.

[0005] The motor cooling system: the motor control continuously generates heat during operation, and the cooling liquid driven by the water pump carries away the heat, and then the heat is released to the outside environment by the electronic fan through the low-temperature water tank.

[0006] Based on the above scheme, the defects are that the passenger compartment heating mode and the battery heating mode both use electric heaters, and all the heat is converted from electric energy, so the utilization of electric energy is relatively low.

[0007] In order to solve the above problems, the existing automobile heat pump system uses the characteristics of the refrigerant to heat the passenger compartment, and the heat pump air conditioner increases the refrigerant reversing valve on the basis of the original system, so that the evaporator and the condenser are functionally exchanged through the reversing valve in winter, and the heat pump can absorb heat from the outside low-temperature environment during heating, thereby improving the utilization of battery electric energy.

[0008] But the above scheme has the following defects, the heat pump system is over certain low temperature range, due to the low temperature of the outside, the ability of refrigerant from the outside absorbs heat is reduced, only by continuously improving the compressor power consumption, can maintain the refrigerant from the outside to absorb heat, the lower the temperature, the worse the heating capacity of the heat pump, the higher the power consumption; The heater needs to be heated twice to assist the heat pump to work; Because the heater is connected in series in the battery heating pipeline, the water temperature cannot be too high during the heating process of the heater assisted heat pump, otherwise the high water temperature will cause the battery cell temperature alarm; Because the heater cannot provide high water temperature, the temperature of the passenger compartment rises slowly during the heating process; Therefore, the heat pump system has certain technical barriers when used at low temperature in winter. SUMMARY

[0009] The technical problem to be solved by the present application is the defects in the prior art, and a novel energy-saving whole vehicle thermal management system is provided, which combines a heat pump system, uses coolant for refrigeration and heating, and combines the heat pump system, a heater, a water pump and a valve to realize multiple system combination and multiple working modes, reduce the energy consumption of the whole vehicle thermal management system during working process, improve the heating efficiency of the system in low temperature environment, and save the electric energy of the battery.

[0010] To solve the above technical problems, the following technical solutions are adopted in the present application:

[0011] A novel energy-saving whole vehicle thermal management system, comprising a heat dissipation waterway, a heat pump system waterway, a heater waterway, an air conditioner waterway and a battery heat exchange waterway.

[0012] The heater waterway comprises a heater, one end of the heater is connected with one end of an unit electromagnetic valve EV2 and a 3# passage of a unit three-way valve TWV1 through a pipeline, and the other end of the heater is connected with one end of an unit electromagnetic valve EV4 through a pipeline.

[0013] The heat pump system waterway comprises an evaporator and a condenser, an electronic expansion valve EXV and an electric compressor HP are installed on the pipeline connecting the evaporator and the condenser, one end of the condenser is connected with one end of an unit electromagnetic valve EV4 through a pipeline, the other end of the condenser is connected with one end of a water pump WP3 through a pipeline, the other end of the water pump WP3 is connected with a 3# passage of a unit three-way valve TWV2 and a 3# passage of a unit three-way valve TWV3 through a pipeline, one end of the evaporator is connected with one end of an unit electromagnetic valve EV3 and a 2# passage of a unit three-way valve TWV1, the other end of the evaporator is connected with one end of a water pump WP2, and the other end of the water pump WP2 is connected with a 2# passage of a unit three-way valve TWV2 and a 2# passage of a unit three-way valve TWV3 through a pipeline.

[0014] Further, the battery heat exchange water circuit comprises a water pump WP1, one end of the water pump WP1 is connected with one end of the battery through a pipeline, the other end of the water pump WP1 and the other end of the battery are both connected with a water-water heat exchanger through a pipeline, the water-water heat exchanger is connected with a 1# passage of a unit three-way valve TWV1 and a 1# passage of a unit three-way valve TWV2 through a pipeline.

[0015] Further, the air conditioner water circuit comprises a warm air core W1 and a cold air core W2, one end of the warm air core W1 is connected with the other end of a unit electromagnetic valve EV2 through a pipeline, the other end of the warm air core W1 is connected with a 3# passage of a unit three-way valve TWV2 and a 3# passage of a unit three-way valve TWV3 through a pipeline; one end of the cold air core W2 is connected with one end of a unit electromagnetic valve EV1 through a pipeline, the other end of the cold air core W2 is connected with a 2# passage of the unit three-way valve TWV2 and a 2# passage of the unit three-way valve TWV3 through a pipeline, the other end of the unit electromagnetic valve EV1 is connected with one end of a unit electromagnetic valve EV3 and a 2# passage of a unit three-way valve TWV1 through a pipeline.

[0016] Further, the heat dissipation water circuit comprises a radiator and a motor electronic control, two ends of the radiator are connected with a 2# passage of a unit three-way valve TWV4 and a 1# passage of a unit three-way valve TWV5 through a pipeline respectively, two ends of the motor electronic control are connected with a 3# passage of the unit three-way valve TWV4 and a 1# passage of a unit three-way valve TWV6 through a pipeline respectively, a 3# passage of the unit three-way valve TWV6 is connected with a 2# passage of the unit three-way valve TWV4, a 2# passage of the unit three-way valve TWV5 is connected with a 3# passage of the unit three-way valve TWV4, a 3# passage of the unit three-way valve TWV5 and a 2# passage of the unit three-way valve TWV6 are connected with a 1# passage of a unit three-way valve TWV3 through a pipeline, a 1# passage of the unit three-way valve TWV4 is connected with the other end of a unit electromagnetic valve EV4 and the other end of a unit electromagnetic valve EV3 through a pipeline.

[0017] A new energy-saving vehicle thermal management system implementation method, including battery heating mode, battery cooling mode, passenger compartment heating mode, passenger compartment cooling mode, passenger compartment and battery heating mode, passenger compartment and battery cooling mode and motor electronic control cooling mode.

[0018] The working principle of the battery heating mode is that the water pump WP1 works, the unit electromagnetic valve EV1, the unit electromagnetic valve EV2, and the unit electromagnetic valve EV4 are disconnected, and the unit electromagnetic valve EV3 is powered on to open; the 1# and 3# passages of the unit three-way valve TWV1 and the unit three-way valve TWV2 are opened, the 1# and 2# passages of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5, and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3, and the fan CF of the radiator work, the heat pump system water circuit works, the heater is in standby state, the fan CF of the radiator absorbs heat from the external environment to the radiator water circuit, the motor electric control releases the heat generated during work to the radiator water circuit, the radiator water circuit transports the heat to the evaporator through the water pump WP2, the evaporator transfers the heat in the water circuit to the refrigerant, the electric compressor HP carries the refrigerant to the condenser, the hot water exchanged by the condenser enters the water-water heat exchanger, and the water pump WP1 transports the heat in the water-water heat exchanger to the battery side. The battery uses the temperature difference of the water-water heat exchanger to meet the water temperature required by the battery heating.

[0019] Further, the working principle of the battery cooling mode is that the water pump WP1 works, the unit electromagnetic valve EV1, the unit electromagnetic valve EV2, and the unit electromagnetic valve EV3 are disconnected, and the unit electromagnetic valve EV4 is powered on to open; the 1# and 2# passages of the unit three-way valve TWV1 and the unit three-way valve TWV2 are opened, the 1# and 3# passages of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5, and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3, and the fan CF of the radiator are powered on to work, the evaporator absorbs the heat transported by the water circuit of the water-water heat exchanger, the electric compressor HP transports the heat to the condenser, the condenser receives the heat transported by the evaporator and transfers it to the radiator water circuit, and the motor electric control releases the heat generated during work to the radiator water circuit. The heat in the radiator water circuit enters the radiator, the fan CF of the radiator releases the heat in the water circuit to the environment, and transports the cooled water to the condenser, the condenser transports the cold water to the evaporator, the cold water exchanged by the evaporator enters the water-water heat exchanger, and the cold water flowing through the water-water heat exchanger exchanges heat with the water solution flowing out of the battery side, achieving the purpose of cooling the battery.

[0020] Further, the working principle of the passenger compartment heating mode is that the water pump WP1 does not work, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are disconnected, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are powered on, the 1# passage and the 2# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened; the water pump WP2, the water pump WP3 and the fan CF of the radiator work, the water circuit of the heat pump system works, the heater is in standby state, the fan CF of the radiator absorbs heat from the external environment to the heat dissipation water circuit, the motor electric control releases the heat generated during work to the heat dissipation water circuit, the heat dissipation water circuit transports the heat to the evaporator through the water pump WP2, the evaporator transfers the heat in the water circuit to the refrigerant, the electric compressor HP carries the refrigerant to the condenser, the hot water exchanged by the condenser enters the warm air core W1, and the warm air core W1 heats the passenger compartment.

[0021] Further, the working principle of the passenger compartment cooling mode is that the water pump WP1 does not work, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are disconnected, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are powered on, the 1# passage and the 3# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator are powered on and work, the water circuit of the heat pump system works, the evaporator absorbs the heat transported by the water-water heat exchanger through the water circuit, the electric compressor HP transports the heat to the condenser, the condenser receives the heat transferred by the evaporator to the heat dissipation water circuit, and the motor electric control releases the heat generated during work to the heat dissipation water circuit, the heat in the heat dissipation water circuit enters the radiator, the fan CF of the radiator releases the heat in the water circuit to the environment, and transports the cooled water to the condenser, the condenser transports the cold water to the evaporator, and the cold water exchanged by the evaporator enters the cold air core W2. The solution flowing through the cold air core W2 is heat-exchanged in this way, the passenger compartment is provided with a blower, and the blower blows the cold air core W2 to exchange heat with air to achieve the purpose of cooling the passenger compartment.

[0022] Further, the working principle of the passenger compartment and battery cooling mode is that the water pump WP1 works, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are disconnected, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are powered on, the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator are powered on and work, the heat pump system water circuit works, the evaporator absorbs heat transmitted by the water circuit, the electric compressor HP transmits heat to the condenser, the condenser receives heat transmitted by the evaporator and transmits the heat to the heat dissipation water circuit, the motor electric control releases heat to the heat dissipation water circuit, the heat in the heat dissipation water circuit enters the radiator, the fan CF of the radiator releases heat in the water circuit to the environment, and the cooled water is transmitted to the condenser, the condenser transmits the cold water to the evaporator, the cold water exchanged by the evaporator enters the cold air core W2 and the water-water heat exchanger, the solution flowing through the cold air core W2 is exchanged in this way, the passenger compartment is provided with a blower, and the blower exchanges heat between the cold air core W2 and air to achieve the purpose of refrigeration of the passenger compartment, the cold water flowing through the water-water heat exchanger is exchanged with the water solution flowing out of the battery pack to achieve the purpose of battery cooling, the water solution of the evaporator does not directly enter the battery, the water temperature required for cooling of the passenger compartment is different from the water temperature required for cooling of the battery, the water temperature required for cooling of the passenger compartment is lower, and the heat exchange temperature difference generated when the water-water heat exchanger exchanges heat meets the cooling requirement of the battery.

[0023] Further, the working principle of the passenger compartment and battery heating mode is that the water pump WP1 works, the 1# passage of the unit three-way valve TWV1 and the unit three-way valve TWV2 is opened, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are powered on, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are disconnected, the 1# passage and the 2# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator work, the fan CF of the radiator absorbs heat from the environment to the heat dissipation water circuit, the motor electric control releases heat to the heat dissipation water circuit, the heat dissipation water circuit transmits heat to the evaporator through the water pump WP2, the evaporator transmits heat in the water circuit to the refrigerant, the electric compressor HP transmits the refrigerant to the condenser, the hot water exchanged by the condenser enters the warm air core W1 and the water-water heat exchanger to heat the passenger compartment and the battery, the water temperature required for the passenger compartment is high, and the water temperature required for the battery is also met by the temperature difference of the water-water heat exchanger, and the size of the temperature difference is realized by the difference in flow rate, and the size of the flow rate needs to be calibrated according to the actual situation.

[0024] Compared with the prior art, the above technical scheme has the following technical effects:

[0025] In combination with the heat pump system, the cooling liquid is used for refrigeration and heating, the heat pump system, the heater, the water pump and the valve are combined for use, multiple system combination and multiple working mode are realized, the energy consumption in the working process of the whole vehicle thermal management system is reduced, the heating efficiency of the system in the low temperature environment is improved, and the electric energy of the battery is saved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0027] Figure 1 It is a schematic diagram of the new energy-saving whole vehicle thermal management system in the present application;

[0028] Figure 2 It is a schematic diagram of the battery heating mode in the present application;

[0029] Figure 3 It is a schematic diagram of the battery cooling mode in the present application;

[0030] Figure 4 It is a schematic diagram of the passenger compartment heating mode and the passenger compartment and battery heating mode in the present application;

[0031] Figure 5 It is a schematic diagram of the passenger compartment cooling mode and the passenger compartment and battery cooling mode in the present application;

[0032] Figure 6 It is a schematic diagram of the motor electric control cooling mode in the present application. DETAILED DESCRIPTION

[0033] An embodiment, as shown in FIG. 1, a new energy-saving whole vehicle thermal management system, comprising a heat dissipation waterway, a heat pump system waterway, a heater waterway, an air conditioning waterway and a battery heat exchange waterway.

[0034] The heater waterway comprises a heater, one end of the heater is connected with one end of an electric valve EV2 and a 3# passage of a three-way valve TWV1 through a pipeline, and the other end of the heater is connected with one end of an electric valve EV4 through a pipeline.

[0035] The battery heat exchange waterway comprises a water pump WP1, one end of the water pump WP1 is connected with one end of a battery through a pipeline, the other end of the water pump WP1 and the other end of the battery are both connected with a water-water heat exchanger through a pipeline, and the water-water heat exchanger is connected with a 1# passage of a three-way valve TWV1 and a 1# passage of a three-way valve TWV2 through a pipeline.

[0036] The air conditioning water circuit comprises a warm air core W1 and a cold air core W2, one end of the warm air core W1 is connected with one end of a unit electromagnetic valve EV2 through a pipeline, the other end of the warm air core W1 is connected with a 3# passage of a unit three-way valve TWV2 and a 3# passage of a unit three-way valve TWV3 through a pipeline; one end of the cold air core W2 is connected with one end of a unit electromagnetic valve EV1 through a pipeline, the other end of the cold air core W2 is connected with a 2# passage of the unit three-way valve TWV2 and a 2# passage of the unit three-way valve TWV3 through a pipeline, the other end of the unit electromagnetic valve EV1 is connected with one end of a unit electromagnetic valve EV3 and a 2# passage of a unit three-way valve TWV1 through a pipeline.

[0037] The heat pump system water circuit comprises an evaporator and a condenser, an electronic expansion valve EXV and an electric compressor HP are installed in a pipeline connected with the evaporator and the condenser, one end of the condenser is connected with one end of a unit electromagnetic valve EV4 through a pipeline, the other end of the condenser is connected with one end of a water pump WP3 through a pipeline, the other end of the water pump WP3 is connected with a 3# passage of a unit three-way valve TWV2 and a 3# passage of a unit three-way valve TWV3 through a pipeline, one end of the evaporator is connected with one end of a unit electromagnetic valve EV3 and a 2# passage of a unit three-way valve TWV1, the other end of the evaporator is connected with one end of a water pump WP2, the other end of the water pump WP2 is connected with a 2# passage of the unit three-way valve TWV2 and a 2# passage of the unit three-way valve TWV3 through a pipeline.

[0038] The heat dissipation water circuit comprises a heat sink and a motor electronic control, two ends of the heat sink are respectively connected with a 2# passage of a unit three-way valve TWV4 and a 1# passage of a unit three-way valve TWV5 through pipelines, two ends of the motor electronic control are respectively connected with a 3# passage of the unit three-way valve TWV4 and a 1# passage of a unit three-way valve TWV6 through pipelines, a 3# passage of the unit three-way valve TWV6 is connected with a 2# passage of the unit three-way valve TWV4, a 2# passage of the unit three-way valve TWV5 is connected with a 3# passage of the unit three-way valve TWV4, a 3# passage of the unit three-way valve TWV5 and a 2# passage of the unit three-way valve TWV6 are connected with a 1# passage of a unit three-way valve TWV3 through a pipeline, a 1# passage of the unit three-way valve TWV4 is connected with the other end of a unit electromagnetic valve EV4 and the other end of a unit electromagnetic valve EV3 through a pipeline.

[0039] The implementation method of the new energy-saving whole vehicle thermal management system comprises a battery heating mode, a battery cooling mode, a passenger compartment heating mode, a passenger compartment cooling mode, a passenger compartment and battery heating mode, a passenger compartment and battery cooling mode, and a motor electronic control cooling mode.

[0040] As Figure 2As shown, the working principle of the battery heating mode is that the water pump WP1 works, the unit electromagnetic valve EV1, the unit electromagnetic valve EV2, and the unit electromagnetic valve EV4 are disconnected, and the unit electromagnetic valve EV3 is powered on; the 1# and 3# passages of the unit three-way valve TWV1 and the unit three-way valve TWV2 are opened, the 1# and 2# passages of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5, and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3, and the fan CF of the radiator work, the heat pump system water circuit works, the heater is in standby state, the fan CF of the radiator absorbs heat from the external environment to the radiator water circuit, the motor electric control releases the heat generated during work to the radiator water circuit, the radiator water circuit transports the heat to the evaporator through the water pump WP2, the evaporator transfers the heat in the water circuit to the refrigerant, the electric compressor HP carries the refrigerant to the condenser, the heat water exchanged by the condenser enters the water-water heat exchanger, the water pump WP1 transports the heat in the water-water heat exchanger to the battery side, and the battery uses the temperature difference of the water-water heat exchanger to meet the water temperature required by the battery heating.

[0041] As shown in Figure 3 As shown, the working principle of the battery cooling mode is that the water pump WP1 works, the unit electromagnetic valve EV1, the unit electromagnetic valve EV2, and the unit electromagnetic valve EV3 are disconnected, and the unit electromagnetic valve EV4 is powered on; the 1# and 2# passages of the unit three-way valve TWV1 and the unit three-way valve TWV2 are opened, the 1# and 3# passages of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5, and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3, and the fan CF of the radiator are powered on and work, the evaporator absorbs the heat transported by the water circuit of the water-water heat exchanger, the electric compressor HP transports the heat to the condenser, the condenser receives the heat transported by the evaporator and transfers it to the radiator water circuit, at the same time, the motor electric control releases the heat generated during work to the radiator water circuit, the heat in the radiator water circuit enters the radiator, the fan CF of the radiator releases the heat in the water circuit to the environment, and transports the cooled water to the condenser, the condenser transports the cold water to the evaporator, the cold water exchanged by the evaporator enters the water-water heat exchanger, and the cold water flowing through the water-water heat exchanger exchanges heat with the water solution flowing out of the battery side, achieving the purpose of battery cooling.

[0042] As shown in Figure 4As shown, the working principle of the passenger compartment heating mode is that the water pump WP1 does not work, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are disconnected, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are powered on, the 1# passage and the 2# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened; the water pump WP2, the water pump WP3 and the fan CF of the radiator work, the water circuit of the heat pump system works, the heater is in standby state, the fan CF of the radiator absorbs heat from the external environment to the heat dissipation water circuit, the motor control releases the heat generated during work to the heat dissipation water circuit, the heat dissipation water circuit transports the heat to the evaporator through the water pump WP2, the evaporator transfers the heat in the water circuit to the refrigerant, the electric compressor HP carries the refrigerant to the condenser, the hot water exchanged by the condenser enters the warm air core W1, and the warm air core W1 heats the passenger compartment.

[0043] As shown in Figure 5 The working principle of the passenger compartment cooling mode is that the water pump WP1 does not work, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are disconnected, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are powered on, the 1# passage and the 3# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator are powered on and work, the water circuit of the heat pump system works, the evaporator absorbs the heat transported by the water-water heat exchanger through the water circuit, the electric compressor HP transports the heat to the condenser, the condenser receives the heat transferred by the evaporator to the heat dissipation water circuit, and the motor control releases the heat generated during work to the heat dissipation water circuit, the heat in the heat dissipation water circuit enters the radiator, the fan CF of the radiator releases the heat in the water circuit to the environment, and transports the cooled water to the condenser, the condenser transports the cold water to the evaporator, and the cold water exchanged by the evaporator enters the cold air core W2. The solution flowing through the cold air core W2 is heat-exchanged in this way, the passenger compartment is provided with a blower, and the blower blows the cold air core W2 to exchange heat with air to achieve the purpose of cooling the passenger compartment.

[0044] As shown in Figure 5As shown, the working principle of the passenger cabin and battery cooling mode is that the water pump WP1 works, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are disconnected, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are powered on, the 1# passage and the 3# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator are powered on and work, the heat pump system water circuit works, the evaporator absorbs the heat transmitted by the water circuit, the electric compressor HP transmits the heat to the condenser, the condenser receives the heat transmitted by the evaporator and transmits the heat to the heat dissipation water circuit, the motor electric control releases the heat to the heat dissipation water circuit, the heat in the heat dissipation water circuit enters the radiator, the fan CF of the radiator releases the heat in the water circuit to the environment, and the cooled water is transmitted to the condenser, the condenser transmits the cold water to the evaporator, the cold water exchanged by the evaporator enters the cold air core W2 and the water-water heat exchanger, the solution flowing through the cold air core W2 is exchanged in this way, the passenger cabin is provided with a blower, and the blower exchanges heat between the cold air core W2 and the air to achieve the purpose of refrigeration of the passenger cabin, the cold water flowing through the water-water heat exchanger is exchanged with the water solution flowing out of the battery pack to achieve the purpose of battery cooling, the evaporator water solution does not directly enter the battery, the water temperature required for cooling the passenger cabin is different from the water temperature required for cooling the battery, the water temperature required for cooling the passenger cabin is lower, and the heat exchange temperature difference generated when the water-water heat exchanger exchanges heat meets the cooling requirement of the battery.

[0045] As shown in Figure 4 the working principle of the passenger cabin and battery heating mode is that the water pump WP1 works, the 1# passage of the unit three-way valve TWV1 and the unit three-way valve TWV2 is opened, the unit electromagnetic valve EV2 and the unit electromagnetic valve EV3 are powered on, the unit electromagnetic valve EV1 and the unit electromagnetic valve EV4 are disconnected, the 1# passage and the 2# passage of the unit three-way valve TWV3, the unit three-way valve TWV4, the unit three-way valve TWV5 and the unit three-way valve TWV6 are opened, the water pump WP2, the water pump WP3 and the fan CF of the radiator work, the fan CF of the radiator absorbs heat from the outside environment to the heat dissipation water circuit, the motor electric control releases the heat to the heat dissipation water circuit, the heat dissipation water circuit transmits the heat to the evaporator through the water pump WP2, the evaporator transmits the heat in the water circuit to the refrigerant, the electric compressor HP transmits the refrigerant to the condenser, the hot water exchanged by the condenser enters the warm air core W1 and the water-water heat exchanger to heat the passenger cabin and the battery, the water temperature required for the passenger cabin is high, and the water temperature required for the battery is also met by the temperature difference of the water-water heat exchanger, and the size of the temperature difference is realized by the difference between the two flow rates, and the size of the flow rate needs to be calibrated according to the actual situation.

[0046] As shown in Figure 6As shown, the working principle of the motor electric control cooling mode is that the unit electromagnetic valves EV1, EV2 and EV3 are disconnected, the unit electromagnetic valve EV4 is powered on to open, the 1# and 3# passages of the unit three-way valves TWV3, TWV4, TWV5 and TWV6 are opened, the unit water pump WP3 and the fan CF of the radiator are powered on to work, the heat pump system and the heater are not worked, the motor electric control releases heat to the water, and the fan CF of the radiator releases heat in the water circuit to the environment.

[0047] The heat transfer of the battery heating mode, the passenger compartment heating mode and the passenger compartment and battery heating mode can also be performed by the heater working, at this time, the water circuit of the heat pump system can work or not work, the heat pump works, the heater does not work, the heat pump does not work, the heater works, and the heat pump and the heater both work, and the three working states are worked according to the actual situation.

[0048] The passenger compartment refrigeration and heating are manually input (driver operation), when the driver operates the air conditioning panel, the signal is transmitted to the vehicle controller, the vehicle controller sends a signal to the thermal management system. The thermal management system adjusts the fan flow, the water pump flow and the unit power output according to the demand to achieve the required input. The battery refrigeration and heating demand, the battery internal temperature sensor, monitors the battery cell temperature deviation from the normal range and sends the refrigeration or heating signal to the vehicle controller, the vehicle controller transmits the signal to the thermal management system, and the thermal management system adjusts the fan flow, the water pump flow and the unit power output according to the demand to achieve the required input. The passenger compartment refrigeration and heating and the battery refrigeration and heating, and the cooling of the motor, are temperature conversion signals, and the fan flow, the water pump flow and the unit power are controlled by judging the temperature value. The fan flow, the water pump flow and the unit power corresponding to a certain temperature are calibrated according to the actual application. The passenger compartment and the battery are respectively opened or double opened, and the opening and closing directions of the valves are adjusted according to the demand signal to realize it. (The fan and the water pump are PWM speed regulation, the heat pump unit (electric compressor) is speed regulated through CAN signal, and the valve is realized through CAN signal).

[0049] The description of the present application is given for example and description, and is not exhaustive or limits the present application to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The selection and description of embodiments are to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A method for implementing a novel energy-saving vehicle thermal management system, characterized in that: The thermal management system includes heat dissipation water circuits, heat pump system water circuits, heater water circuits, air conditioning water circuits, and battery heat exchange water circuits. The heater water circuit includes a heater, one end of which is connected to one end of the unit solenoid valve EV2 and the 3# passage of the unit three-way valve TWV1 via a pipeline, and the other end of which is connected to one end of the unit solenoid valve EV4 via a pipeline. The heat pump system water circuit includes an evaporator and a condenser. The pipes connecting the evaporator and condenser are equipped with an electronic expansion valve EXV and an electric compressor HP. One end of the condenser is connected to one end of the unit solenoid valve EV4 via a pipe, and the other end of the condenser is connected to one end of the water pump WP3 via a pipe. The other end of the water pump WP3 is connected to the 3# passage of the unit three-way valve TWV2 and the 3# passage of the unit three-way valve TWV3 via a pipe. One end of the evaporator is connected to one end of the unit solenoid valve EV3 and the 2# passage of the unit three-way valve TWV1. The other end of the evaporator is connected to one end of the water pump WP2, and the other end of the water pump WP2 is connected to the 2# passage of the unit three-way valve TWV2 and the 2# passage of the unit three-way valve TWV3 via a pipe. The battery hot water exchange circuit includes a water pump WP1. One end of the water pump WP1 is connected to one end of the battery through a pipeline. The other end of the water pump WP1 and the other end of the battery are both connected to a water-to-water heat exchanger through pipelines. The water-to-water heat exchanger is connected to the No. 1 passage of the unit's three-way valve TWV1 and the No. 1 passage of the unit's three-way valve TWV2 through pipelines. The air conditioning water circuit includes a heating core W1 and a cooling core W2. One end of the heating core W1 is connected to the other end of the unit's solenoid valve EV2 via a pipe. The other end of the heating core W1 is connected to the 3# passage of the unit's three-way valve TWV2 and the 3# passage of the unit's three-way valve TWV3 via a pipe. One end of the cooling core W2 is connected to one end of the unit's solenoid valve EV1 via a pipe. The other end of the cooling core W2 is connected to the 2# passage of the unit's three-way valve TWV2 and the 2# passage of the unit's three-way valve TWV3 via a pipe. The other end of the unit's solenoid valve EV1 is connected to one end of the unit's solenoid valve EV3 and the 2# passage of the unit's three-way valve TWV1 via a pipe. The cooling water circuit includes a radiator and a motor control unit. The two ends of the radiator are connected to the 2# passage of the unit's three-way valve TWV4 and the 1# passage of the unit's three-way valve TWV5 respectively via pipes. The two ends of the motor control unit are connected to the 3# passage of the unit's three-way valve TWV4 and the 1# passage of the unit's three-way valve TWV6 respectively via pipes. The 3# passage of the unit's three-way valve TWV6 is connected to the 2# passage of the unit's three-way valve TWV4. The 2# passage of the unit's three-way valve TWV5 is connected to the 3# passage of the unit's three-way valve TWV4. The 3# passage of the unit's three-way valve TWV5 and the 2# passage of the unit's three-way valve TWV6 are connected to the 1# passage of the unit's three-way valve TWV3 via pipes. The 1# passage of the unit's three-way valve TWV4 is connected to the other end of the unit's solenoid valve EV4 and the other end of the unit's solenoid valve EV3 via pipes. The implementation methods include battery heating mode, battery cooling mode, passenger compartment heating mode, passenger compartment cooling mode, passenger compartment and battery heating mode, passenger compartment and battery cooling mode, and motor and electronic control cooling mode. The battery heating mode operates as follows: water pump WP1 is activated, solenoid valves EV1, EV2, and EV4 are deactivated, and solenoid valve EV3 is energized and opened. The 1# and 3# passages of unit three-way valves TWV1 and TWV2 are opened, as are the 1# and 2# passages of unit three-way valves TWV3, TWV4, TWV5, and TWV6. Water pumps WP2 and WP3, and the radiator fan CF are activated, thus activating the heat pump system's water circuit. When the radiator is in standby mode, the radiator fan CF absorbs heat from the external environment and transfers it to the cooling water circuit. The motor and electronic control release the heat from the operation into the cooling water circuit. The cooling water circuit, through the water pump WP2, transfers the heat to the evaporator. The evaporator transfers the heat from the water circuit to the refrigerant. The electric compressor HP transports the refrigerant to the condenser. The hot water from the condenser enters the water-to-water heat exchanger. The water pump WP1 transfers the heat from the water-to-water heat exchanger to the battery side. The battery uses the temperature difference from the water-to-water heat exchanger to meet the water temperature required for battery heating.

2. The method for implementing a novel energy-saving vehicle thermal management system as described in claim 1, characterized in that: The battery cooling mode operates as follows: water pump WP1 is activated, solenoid valves EV1, EV2, and EV3 are deactivated, solenoid valve EV4 is energized and opened, and passages 1 and 2 of three-way valves TWV1 and TWV2 are opened. Passages 1 and 3 of three-way valves TWV3, TWV4, TWV5, and TWV6 are also opened. Water pumps WP2 and WP3, and the radiator fan CF are energized. The evaporator absorption water-water heat exchanger delivers water through the water circuit. The heat supplied by the evaporator is transferred to the condenser by the electric compressor HP. The condenser receives the heat from the evaporator and transfers it to the cooling water circuit. At the same time, the motor and electronic control release the heat from the operation into the cooling water circuit. The heat in the cooling water circuit enters the radiator. The radiator fan CF releases the heat from the water circuit into the environment and delivers the cooled water to the condenser. The condenser delivers the cold water to the evaporator. The cold water from the evaporator enters the water-to-water heat exchanger. The cold water flowing through the water-to-water heat exchanger exchanges heat with the aqueous solution flowing out from the battery side to achieve the purpose of cooling the battery.

3. The implementation method of a novel energy-saving vehicle thermal management system as described in claim 1, characterized in that: The operating principle of the crew compartment heating mode is as follows: water pump WP1 is not working, unit solenoid valves EV1 and EV4 are disconnected, unit solenoid valves EV2 and EV3 are energized and opened, and the 1# and 2# passages of unit three-way valves TWV3, TWV4, TWV5, and TWV6 are opened. Water pumps WP2 and WP3, and the radiator fan CF are operating, the heat pump system water circuit is working, the heater is in standby mode, the radiator fan CF absorbs heat from the external environment into the cooling water circuit, the motor and electronic control release the heat from the operation into the cooling water circuit, the cooling water circuit transfers the heat to the evaporator through water pump WP2, the evaporator transfers the heat in the water circuit to the refrigerant, the electric compressor HP transports the refrigerant to the condenser, the hot water from the condenser heat exchange enters the heating core W1, the heating core W1 heats the passenger compartment.

4. The implementation method of a novel energy-saving vehicle thermal management system as described in claim 1, characterized in that: The operating principle of the passenger compartment cooling mode is as follows: water pump WP1 is not working, unit solenoid valves EV2 and EV3 are disconnected, unit solenoid valves EV1 and EV4 are energized and opened, and the #1 and #3 passages of unit three-way valves TWV3, TWV4, TWV5, and TWV6 are opened. Water pumps WP2 and WP3 and the radiator fan CF are energized and working, the heat pump system water circuit is working, the evaporator absorbs the heat transferred through the water circuit by the water-to-water heat exchanger, and the electric compressor HP transfers the heat to the condenser. In the unit, the condenser receives heat from the evaporator and transfers it to the cooling water circuit. At the same time, the motor and electronic control release the heat from the operation into the cooling water circuit. The heat in the cooling water circuit enters the radiator. The radiator's fan CF releases the heat from the water circuit into the environment and delivers the cooled water to the condenser. The condenser delivers the cold water to the evaporator. The cold water from the evaporator enters the cold air core W2. The solution flowing through the cold air core W2 exchanges heat in this way. The passenger compartment is equipped with a blower. The blower blows air to exchange heat between the cold air core W2 and the air to achieve the purpose of cooling the passenger compartment.

5. The implementation method of a novel energy-saving vehicle thermal management system as described in claim 1, characterized in that: The operating principle of the passenger compartment and battery cooling mode is as follows: Water pump WP1 operates, solenoid valves EV2 and EV3 are disconnected, solenoid valves EV1 and EV4 are energized and opened, and the 1# and 3# passages of three-way valves TWV3, TWV4, TWV5, and TWV6 are opened. Water pumps WP2 and WP3, and the radiator fan CF are energized and operate, thus activating the heat pump system's water circuit. The evaporator absorbs heat transferred through the water-to-water heat exchanger, and the electric compressor HP transfers this heat to the condenser. The condenser receives the heat from the evaporator and transfers it to the cooling water circuit. Simultaneously, the motor and electronic control system release heat from the operation into the cooling water circuit, where the heat enters the radiator and dissipates. The heater's fan CF releases heat from the water circuit into the environment and delivers the cooled water to the condenser. The condenser then delivers the cooled water to the evaporator. The cooled water from the evaporator enters the cooling air core W2 and the water-to-water heat exchanger. The solution flowing through the cooling air core W2 exchanges heat in the following way: The passenger compartment has a blower that blows air to exchange heat between the cooling air core W2 and the air, achieving the purpose of cooling the passenger compartment. The cooled water flowing through the water-to-water heat exchanger exchanges heat with the aqueous solution flowing out of the battery pack, achieving the purpose of cooling the battery. The aqueous solution in the evaporator does not directly enter the battery. The water temperature required for cooling the passenger compartment is different from the water temperature required for cooling the battery. The water temperature for cooling the passenger compartment is lower, and the heat exchange temperature difference generated during the water-to-water heat exchanger meets the battery cooling requirements.

6. The implementation method of a novel energy-saving vehicle thermal management system as described in claim 1, characterized in that: The operating principle of the crew compartment and battery heating mode is that the water pump WP1 is working, and the No. 1 passage of the unit three-way valve TWV1 and the unit three-way valve TWV2 is opened; Unit solenoid valves EV2 and EV3 are energized and opened, while unit solenoid valves EV1 and EV4 are disconnected; the 1# and 2# passages of unit three-way valves TWV3, TWV4, TWV5, and TWV6 are opened. Water pumps WP2 and WP3, and the radiator fan CF operate. The radiator fan CF absorbs heat from the external environment and transfers it to the cooling water circuit. The motor and electronic control release the heat from the operation into the cooling water circuit. The cooling water circuit, through water pump WP2, transfers the heat to the evaporator. The evaporator transfers the heat from the water circuit to the refrigerant. The electric compressor HP transports the refrigerant to the condenser. The hot water from the condenser enters the heater core W1 and the water-to-water heat exchanger to heat the passenger compartment and the battery. The passenger compartment requires a higher water temperature. On the battery side, the temperature difference from the water-to-water heat exchanger is used to meet the water temperature requirements for battery heating. The size of the temperature difference is achieved by the difference in flow rates on both sides. The flow rate needs to be calibrated according to the actual situation.

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