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CN-224210864-U - Thermal management system of plug-in hybrid electric vehicle

CN224210864UCN 224210864 UCN224210864 UCN 224210864UCN-224210864-U

Abstract

The utility model discloses a thermal management system of a plug-in hybrid electric vehicle, and belongs to the technical field of plug-in hybrid electric vehicles. The intelligent air conditioner mainly comprises a motor electric control loop, a passenger cabin heating loop, a passenger cabin refrigerating loop, an engine loop and a battery loop, wherein a warm air core body and a liquid-liquid heat exchanger for heating are arranged in the passenger cabin heating loop, a cooler chip for refrigerating is arranged in the passenger cabin refrigerating loop, the motor electric control loop is connected with the passenger cabin heating loop in series, the warm air core body is connected with the liquid-liquid heat exchanger in parallel and then is communicated with the battery loop, and the cooler chip is connected with the liquid-liquid heat exchanger in series and then is communicated with the battery loop. According to the utility model, the motor electric control loop is connected with the passenger cabin heating loop in series, the warm air core body and the liquid-liquid heat exchanger are connected in parallel to the passenger cabin heating loop and the battery loop, so that the cooperative utilization of multiple heat sources is realized, the heating stability is improved, meanwhile, the PTC or heat pump pipeline is omitted, the production cost is reduced, the additional energy consumption is greatly reduced, and the energy utilization rate of the whole vehicle is improved.

Inventors

  • WANG JIANQIU
  • YANG GUANG
  • FENG GANG

Assignees

  • 北京汽车制造厂(青岛)有限公司

Dates

Publication Date
20260508
Application Date
20250523

Claims (6)

  1. 1. A thermal management system of an electric plug-in hybrid electric vehicle comprises a motor electric control loop (1), a passenger cabin heating loop (3), a passenger cabin refrigerating loop (4), an engine loop (2) and a battery loop (5), wherein a warm air core (304) and a liquid-liquid heat exchanger (305) for heating are arranged in the passenger cabin heating loop (3), and a cooler child (401) for cooling is arranged in the passenger cabin refrigerating loop (4), and is characterized in that the motor electric control loop (1) is connected in series with the passenger cabin heating loop (3), the warm air core (304) is connected in parallel with the liquid-liquid heat exchanger (305) and then is connected with the battery loop (5), and the cooler child (401) is connected with the battery loop (5) after being connected in series with the liquid-liquid heat exchanger (305).
  2. 2. The thermal management system of the plug-in hybrid electric vehicle according to claim 1, wherein the motor electric control loop (1) comprises a first water pump (102), a first DCDC & OBC module (103), a second GCU module (104), a MCU module (105), a driving motor (106), a generator (107) and a low-temperature radiator (109), and cooling channels of the first water pump (102), the first DCDC & OBC module (103), the second GCU module (104), the MCU module (105), the driving motor (106), the generator (107) and the low-temperature radiator (109) are connected in series.
  3. 3. The thermal management system of the plug-in hybrid electric vehicle according to claim 2, further comprising a motor electric control loop kettle (101), wherein the motor electric control loop kettle (101) is communicated with the motor electric control loop (1) through a three-way valve, a three-way proportional valve I (108) is arranged between the generator (107) and the low-temperature radiator (109), an A port of the three-way proportional valve I (108) is communicated with a cooling channel of the generator (107), a B port of the three-way proportional valve I (108) is communicated with the low-temperature radiator (109), and a C port of the three-way proportional valve I (108) is communicated with the passenger cabin heating loop (3).
  4. 4. The thermal management system of the plug-in hybrid electric vehicle according to claim 1, wherein the battery loop (5) comprises a water pump III (501) and a high-voltage battery (502), the water pump III (501) is communicated with a cooling channel of the high-voltage battery (502), the liquid-liquid heat exchanger (305) and a cooler child (401) are sequentially connected in series, and the cooler child (401) is communicated with the water pump III (501).
  5. 5. The heat management system of the plug-in hybrid electric vehicle according to claim 1, wherein the passenger cabin heating loop (3) further comprises a second three-way proportional valve (301), a third three-way proportional valve (302) and a second water pump (303), an A port of the third three-way proportional valve (302) is communicated with the second water pump (303), a B port of the third three-way proportional valve (302) is communicated with the liquid-liquid heat exchanger (305), a C port of the third three-way proportional valve (302) is communicated with a warm air core (304), and pipelines after the warm air core (304) is connected with the liquid-liquid heat exchanger (305) in parallel are respectively communicated with the second water pump (303) and the engine loop (2) through the second three-way proportional valve (301).
  6. 6. The heat management system of the plug-in hybrid electric vehicle according to claim 5, wherein an A port of the second three-way proportional valve (301) is respectively communicated with a motor electric control loop (1) and a pipeline after a warm air core (304) is connected with the liquid-liquid heat exchanger (305) in parallel through a three-way valve, and a C port of the second three-way proportional valve (301) is respectively connected with the engine loop (2) and the second water pump (303) through a three-way valve.

Description

Thermal management system of plug-in hybrid electric vehicle Technical Field The utility model belongs to the technical field of plug-in hybrid electric vehicles, and particularly relates to a thermal management system of a plug-in hybrid electric vehicle. Background As a travel tool, automobiles are required to meet the daily heating requirements of passenger cabins. Compared with the traditional fuel oil vehicle, the plug-in hybrid electric vehicle can not utilize the waste heat of the engine to heat the passenger cabin under partial working conditions, such as when the engine is not in an intervening (pure electric mode). Accordingly, the thermal management system design of plug-in hybrid vehicles is often more complex. The patent with the publication number of CN218197822U discloses a hybrid vehicle type thermal management system, which comprises an engine main body, an engine radiating piece and a warm air subsystem, wherein the warm air subsystem comprises a plate heat exchanger, the plate heat exchanger is also connected with a power driving subsystem, the warm air subsystem comprises the plate heat exchanger, a PTC water pump and a PTC heater, the engine main body is connected with the PTC heater through a first three-way valve, a liquid channel communicated with the engine main body is further arranged between the PTC water pump and the PTC heater, the power driving subsystem comprises a battery cooler, an outlet of the battery cooler is connected with the plate heat exchanger, and the other valve port of the second three-way valve is indirectly connected between the plate heat exchanger and an outlet of the battery cooler. Through the design, the engine high-temperature cooling liquid circulation passage is regulated, and the PTC service environment can be optimized according to conditions. The scheme mainly utilizes the heat pump or the PTC to heat the passenger cabin of the plug-in hybrid electric vehicle, namely utilizes the waste heat of the engine to heat under the hybrid working condition, and utilizes the heat pump or the PTC to heat under the pure electric working condition. The heat pump type PTC heating system has the advantages that 1, the heat pump or PTC heating is adopted, the heat management system comprises a plurality of elements, the cost is high, the pipeline connection is complex, inconvenience is brought to the whole vehicle development, 2, the PTC heater only radiates heat through an engine cooling liquid loop, when the engine does not run (pure electric mode) and the PTC works under high load, the temperature of the cooling liquid can continuously rise, and the PTC overheat protection is triggered frequently, so that the heating stability is affected. Disclosure of utility model The utility model aims to solve the technical problems of overcoming the defects of the prior art, providing the thermal management system of the plug-in hybrid electric vehicle, which is connected with a passenger cabin heating loop in series through a motor electric control loop, and a warm air core body and a liquid-liquid heat exchanger are connected in parallel to the passenger cabin heating loop and a battery loop, so that the multi-heat-source cooperative utilization is realized, the heating stability is improved, meanwhile, a PTC (Positive temperature coefficient) or heat pump pipeline is eliminated, the production cost is reduced, the additional energy consumption is greatly reduced, and the energy utilization rate of the whole vehicle is improved. The thermal management system of the plug-in hybrid electric vehicle comprises a motor electric control loop, a passenger cabin heating loop, a passenger cabin refrigerating loop, an engine loop and a battery loop, wherein a warm air core body and a liquid-liquid heat exchanger for heating are arranged in the passenger cabin heating loop, a cooler chip for refrigerating is arranged in the passenger cabin refrigerating loop, the motor electric control loop is connected with the passenger cabin heating loop in series, the warm air core body is connected with the liquid-liquid heat exchanger in parallel and then is communicated with the battery loop, and the cooler chip is connected with the liquid-liquid heat exchanger in series and then is communicated with the battery loop. Preferably, the motor electric control loop comprises a water pump I, a DCDC & OBC module, a GCU module, an MCU module, a driving motor, a generator and a low-temperature radiator, wherein the cooling channels of the water pump I, the DCDC & OBC module, the GCU module, the MCU module, the driving motor, the generator and the low-temperature radiator are connected in series. Preferably, the electric control system further comprises a motor electric control loop kettle, wherein the motor electric control loop kettle is communicated with the motor electric control loop through a three-way valve, a three-way proportional valve I is arranged between the generator and the low-tempera