CN-122008797-A - Motor waste heat, battery cooling and passenger cabin integrated thermal management system based on multi-way valve

CN122008797ACN 122008797 ACN122008797 ACN 122008797ACN-122008797-A

Abstract

The invention discloses a motor waste heat, battery cooling and passenger cabin integrated heat management system based on a multi-way valve, and belongs to the technical field of new energy automobile heat management. The system comprises a whole car thermal control module and an intelligent multi-way valve; the whole-vehicle thermal control module collects whole-vehicle thermal management parameters of a vehicle in real time, judges a thermal management mode according to a preset temperature control logic according to the whole-vehicle thermal management parameters, wherein the thermal management mode comprises a summer high-temperature refrigeration mode, a winter low-temperature waste heat recovery mode and a spring and autumn steady energy-saving mode, and combines a heat or cold accounting result with a thermal management strategy library to generate a flow channel regulation instruction; the intelligent multi-way valve adaptively switches the on-off state of the runner and the flow distribution ratio of the runner according to the runner regulation and control instruction. The invention realizes the integrated cooperative control of the motor waste heat recovery, the battery temperature control and the passenger cabin temperature adjustment, effectively improves the energy utilization rate, ensures the battery safety and the endurance, and reduces the system energy consumption.

Inventors

LI BAOMIN
LI YUJIANG
ZHOU JINCHENG
YANG JIAN

Assignees

江苏嘉和热系统股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (9)

1. The motor waste heat, battery cooling and passenger cabin integrated thermal management system based on the multi-way valve comprises a whole vehicle thermal control module and an intelligent multi-way valve, wherein the whole vehicle thermal control module is in communication connection with the intelligent multi-way valve through a CAN bus; The intelligent multi-way valve is used for self-adaptively switching the on-off state of the runner and the flow distribution ratio of the runner according to the runner regulation and control instruction and is used for the utilization of motor waste heat control, the temperature control of a power battery and the temperature regulation of a passenger cabin.
2. The multi-way valve-based motor waste heat, battery cooling and passenger compartment integrated thermal management system of claim 1, wherein the whole vehicle global thermal management parameters include drive motor temperature, MCU temperature, power battery pack temperature, passenger compartment temperature, coolant temperature and external ambient temperature.
3. The multi-way valve-based motor waste heat, battery cooling and passenger compartment integrated thermal management system of claim 2, wherein the preset temperature control logic is: When the temperature of the passenger cabin is greater than the preset cabin refrigeration target temperature or the temperature of the power battery pack is greater than the preset battery cooling starting threshold, the thermal management mode is a summer high-temperature refrigeration mode; When the external environment temperature is less than a preset low-temperature judgment threshold value, the power battery pack temperature is less than a preset battery preheating starting threshold value or the passenger cabin temperature is less than a preset cabin heating target temperature, the thermal management mode is a winter low-temperature waste heat recovery mode; otherwise, the thermal management mode is a spring and autumn steady state energy saving mode.
4. The multi-way valve-based motor waste heat, battery cooling and passenger cabin integrated thermal management system according to claim 3, wherein the flow channel regulation and control instruction generation method is as follows: Extracting flow channel on-off combination logic in a current thermal management mode from a thermal management strategy library, simultaneously respectively calculating the motor residual heat, the power battery heat/cold required by the motor and the passenger cabin heat/cold required by the passenger cabin based on global thermal management parameters of the whole vehicle, and calculating flow distribution proportionality coefficients of all open flow channel ports according to the opening and closing states of all flow channel ports in the flow channel on-off combination logic by taking the motor residual heat, the power battery heat/cold required by the motor and the passenger cabin heat/cold required by the motor as quantification basis; the flow channel on-off combination logic is converted into a multi-way valve position control signal, the flow distribution proportion coefficient is converted into an intelligent multi-way valve opening control signal, and accordingly flow channel regulation and control instructions containing the multi-way valve position control signal and the opening control signal are integrated and generated.
5. The multi-way valve-based motor waste heat, battery cooling and passenger cabin integrated thermal management system according to claim 4, wherein the flow passage on-off combination logic of the high-temperature refrigeration mode in summer is that an intelligent multi-way valve closes an auxiliary heating and heat supplementing branch, and a power battery control Wen Zhilu, a passenger cabin temperature control branch, a radiator radiating branch and a motor waste heat recovery branch are conducted.
6. The multi-way valve-based motor waste heat, battery cooling and passenger cabin integrated thermal management system as claimed in claim 4, wherein the flow passage on-off combination logic of the winter low-temperature waste heat recovery mode is that the intelligent multi-way valve is used for conducting a motor waste heat recovery branch, a power battery control Wen Zhilu and a passenger cabin control Wen Zhilu, and a radiator radiating branch and an auxiliary heating complementary heat branch are closed.
7. The multi-way valve-based motor waste heat, battery cooling and passenger cabin integrated thermal management system according to claim 4, wherein the flow passage on-off combination logic of the spring and autumn steady-state energy-saving mode is that an intelligent multi-way valve is used for conducting a motor waste heat recovery branch and a radiator radiating branch, and a power battery control Wen Zhilu, a passenger cabin temperature control branch and an auxiliary heating and supplementing branch are closed.
8. The multi-way valve based motor waste heat, battery cooling and passenger compartment integrated thermal management system of claim 6, wherein the motor waste heat Heat required by power battery And the heat required by the passenger cabin When unbalance of supply and demand occurs, the whole vehicle heat control module executes heat supply and demand balance control, and the heat supply and demand balance is as follows: If it is If the heat gap is judged to exist, the whole vehicle heat control module controls the PTC auxiliary heater to start heating circulation cooling liquid to supplement the heat gap, and meanwhile, an auxiliary heating and heat supplementing branch is conducted; If it is And if the excessive heat exists, the whole vehicle heat control module conducts a heat dissipation branch of the radiator to output the excessive heat to the external environment.
9. The motor waste heat, battery cooling and passenger cabin integrated thermal management system based on the multi-way valve according to claim 1, wherein the intelligent multi-way valve is an integrated electric control multi-way valve and comprises at least 5 runner on-off control interfaces, and a flow regulating actuator arranged in the intelligent multi-way valve is used for realizing flow distribution ratio regulation and control of ports of each runner.

Description

Motor waste heat, battery cooling and passenger cabin integrated thermal management system based on multi-way valve Technical Field The invention relates to the technical field of heat management of new energy automobiles, in particular to a motor waste heat, battery cooling and passenger cabin integrated heat management system based on a multi-way valve. Background The heat management performance of the new energy automobile directly influences the power output of the whole automobile, the safe service life of the power battery and the endurance mileage, and the driving motor, the power battery and the passenger cabin are used as core temperature control objects, and the heat management requirements of the driving motor, the power battery and the passenger cabin are different and are related to each other. In the prior art, most new energy automobiles still adopt separate heat management subsystems to respectively realize motor heat dissipation, battery temperature control and passenger cabin temperature adjustment, waste heat generated by motor operation is not effectively recycled, a PTC auxiliary heater is required to be independently started for passenger cabin heating and battery preheating in winter, power battery energy is greatly consumed, the whole automobile endurance mileage is obviously attenuated, and meanwhile, valve elements and pipelines of the separate systems are redundant, so that the whole automobile arrangement difficulty and the system operation failure rate are increased. In order to improve the defects of a discrete system, partial schemes attempt to build an integrated thermal management architecture, but the schemes are mainly used for judging a thermal management mode and switching on and off of a runner according to single parameters such as ambient temperature, component temperature and the like, do not combine actual heat and cold quantity requirements of all temperature control objects to do quantitative accounting, the flow distribution of the runner lacks scientific quantitative basis, heat loss caused by heat transmission loss of a pipeline is not considered, the problem of unbalanced heat supply and demand in the waste heat recovery process is easy to occur, the temperature control precision is insufficient, the waste heat recovery efficiency of a motor is low, the accurate cooperative regulation and control of the waste heat of the motor, the temperature control of a battery and the temperature regulation of a passenger cabin cannot be realized, and the temperature control effect and the energy utilization efficiency of the whole vehicle thermal management are difficult to be considered. Disclosure of Invention The invention provides a motor waste heat, battery cooling and passenger cabin integrated thermal management system based on a multi-way valve, which aims to solve the problems that the existing thermal management system is low in waste heat recovery efficiency, free of quantitative basis for temperature control and incapable of accurate collaborative regulation. In order to solve the problems, according to one aspect of the invention, the invention discloses a motor waste heat, battery cooling and passenger cabin integrated thermal management system based on a multi-way valve, which comprises a whole vehicle thermal control module and an intelligent multi-way valve, wherein the whole vehicle thermal control module is in communication connection with the intelligent multi-way valve through a CAN bus; The whole-vehicle thermal control module collects whole-vehicle whole-domain thermal management parameters in real time, judges the thermal management mode of the whole-vehicle whole-domain thermal management parameters according to preset temperature control logic, generates corresponding flow channel regulation and control instructions and sends the flow channel regulation and control instructions to the intelligent multi-way valve; The intelligent multi-way valve is used for self-adaptively switching the on-off state of the runner and the flow distribution ratio of the runner according to the runner regulation and control instruction and is used for the utilization of motor waste heat control, the temperature control of a power battery and the temperature regulation of a passenger cabin. Further, the global thermal management parameters of the whole vehicle are obtained by a vehicle-mounted temperature sensor and a flow sensor in a cooling liquid circulation loop and are transmitted to a thermal control module of the whole vehicle in real time through a CAN bus, wherein the global thermal management parameters comprise the temperature of a driving motorMCU (motor controller) temperaturePower battery pack temperatureCabin temperatureTemperature of coolantAnd external ambient temperature。 Further, the preset temperature control logic is: When the temperature of the passenger cabin is greater than the preset target temperature for refrigerating in the cabin Or the pow