CN-122008785-A - Five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system

CN122008785ACN 122008785 ACN122008785 ACN 122008785ACN-122008785-A

Abstract

The invention relates to the technical field of heat management of new energy automobiles, in particular to a five-way valve-based step-by-step enhanced integrated heat management system of a pure electric automobile. The intelligent electric drive device comprises a plurality of valves, a passenger cabin heating loop, an electric drive intelligent temperature control loop and a battery thermal management loop, wherein the valves are used for realizing loop circulation through control of the valves, the passenger cabin heating loop is used for communicating a first five-way valve to realize passenger cabin heating, the electric drive intelligent temperature control loop is used for cooling electric drive components, and the battery thermal management loop is used for realizing active heating and active refrigeration of a battery pack. According to the five-way valve-based progressive enhanced pure electric vehicle integrated thermal management system, the five-way valve is used as a core, intelligent control of heat dissipation/heat preservation of an electric drive loop is achieved, a foundation is laid for subsequent upgrading, pipelines are simplified, cost is reduced, and energy channels between electric drive waste heat and two large demand ends of a battery and a cabin are opened by adding the three-way valve, the four-way valve and the five-way valve step by step, so that waste heat recovery under all working conditions is achieved, PTC heating energy consumption is greatly reduced, and low-temperature endurance mileage is remarkably improved.

Inventors

He Liange
WANG BO
ZHANG YAN
WU LIMIN
LIN CHUNJING
Qi chuang
LIU ZILIN
ZHANG YUEMANG

Assignees

重庆理工大学

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (9)

1. Five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system, which is characterized by comprising: The valves are used for realizing loop circulation through the control of the valves; The valve is at least one of a five-way valve, a three-way valve and a four-way valve (22); the passenger cabin heating loop is used for communicating the first five-way valve (14) to heat the passenger cabin; An electric drive intelligent temperature control loop flows out from an opening a of a first five-way valve (14), is driven by a motor water pump (19) and cools electric drive components of Mcu (18), an auxiliary drive four-in-one (17) and a motor (16); and the battery thermal management loop is used for realizing active heating and active refrigeration of the battery pack (8).
2. The five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system according to claim 1 is characterized in that a passenger cabin heating loop is arranged around a c-e port of the first five-way valve (14) and comprises a passenger cabin water pump (13), a second PTC (12) and a warm air core (11), wherein the passenger cabin heating loop is led out from a d port of the first five-way valve (14), flows into the warm air core (11) after being heated by the passenger cabin water pump (13) and the second PTC (12), and flows back to an e port of the first five-way valve (14).
3. The five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system according to claim 2, further comprising a motor heat source loop, wherein the motor heat source loop comprises Mcu (18), an auxiliary driving four-in-one (17) and a motor (16), is led in from a c port and led out from a d port of the first five-way valve (14), and is used for injecting motor waste heat into the passenger cabin heating loop.
4. The five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system is characterized in that the electrically-driven intelligent temperature control loop is arranged around an a-c port of the first five-way valve (14) and comprises a low-temperature radiator (15), a motor (16), auxiliary driving four-in-one (17) and Mcu (18) and a motor water pump (19), cooling liquid flows out from the a port of the first five-way valve (14), and is driven by the motor water pump (19) to cool an electrically-driven component, and after cooling, one of an electrically-driven uniform temperature/heat preservation mode and an electrically-driven heat dissipation mode is selected.
5. The five-way valve-based step-by-step enhanced integrated thermal management system for a pure electric vehicle according to claim 4, wherein the electric drive temperature equalization/heat preservation mode is used for enabling an electric drive component to quickly reach and maintain an optimal working temperature under a cold start or low load working condition, and the cooling liquid bypasses the low-temperature radiator (15) and directly returns from a c port of the first five-way valve (14) to realize small circulation and reduce heat loss.
6. The five-way valve-based step-by-step enhancement type pure electric vehicle integrated thermal management system according to claim 4, wherein the electric dissipating heat mode is used for realizing large-cycle heat dissipation after cooling liquid is guided to flow through the low-temperature radiator (15) for full cooling under a high-load working condition and returns from the port b of the first five-way valve (14).
7. The five-way valve step-by-step enhanced pure electric vehicle integrated thermal management system is characterized in that the battery thermal management loop is an independent closed loop system and comprises a battery water pump (10), a battery pack (8), a water-cooling evaporator (7) and a first PTC (9), and the battery water pump (10) drives cooling liquid to flow through the first PTC (9) for heating or flow through the water-cooling evaporator (7) for refrigerating, so that active heating and active refrigerating of the battery pack (8) are realized.
8. The five-way valve-based progressive enhancement integrated thermal management system for a battery electric vehicle of claim 1, further comprising a second five-way valve (24) and a second three-way valve (26); The passenger cabin heating loop and the battery heating loop are reconstructed through a second five-way valve (24), and the method comprises the following steps: The passenger cabin heating loop flows out from the port b of the second five-way valve (24), sequentially passes through the second PTC (12) and the warm air core (11), and finally returns to the port d of the second five-way valve (24); The battery heating loop flows out from the c port of the second five-way valve (24), sequentially passes through the first PTC (9) and the battery pack (8), and finally returns to the d port of the second five-way valve (24); the reconstruction and intelligent bypass of the electric drive cooling loop are realized through a second three-way valve (26), and the method comprises the following steps: The electric drive cooling loop flows out from a c port of the first five-way valve (14) and is connected to a b port of the second three-way valve (26), an a port of the second three-way valve (26) is connected with an electric drive component consisting of a motor (16), an auxiliary drive four-in-one (17) and Mcu (18), a c port of the second three-way valve (26) is connected with the low-temperature radiator 15, and an inlet of the electric drive component and an outlet of the low-temperature radiator (15) are converged together and then returned to the b port of the first five-way valve (14).
9. The five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system according to claim 1, further comprising an advanced heat pump architecture consisting of a four-way valve (22) and a water-cooled condenser (23), wherein the four-way valve (22) and the first five-way valve (14) are cooperatively controlled to realize flexible coupling of a refrigerant loop and a cooling liquid loop and direct heating of a battery loop, and high-grade heat energy released by the water-cooled condenser (23) is utilized to efficiently heat a battery and a passenger cabin.

Description

Five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system Technical Field The invention relates to the technical field of heat management of new energy automobiles, in particular to a five-way valve-based step-by-step enhanced integrated heat management system of a pure electric automobile. Background The pure electric vehicle (BEV) integrates a plurality of heat sources/temperature control components such as a driving motor, a motor controller, a power battery, an auxiliary driving four-in-one component and the like. The core task of the thermal management system is to ensure that each component works in an optimal temperature range and provide a comfortable temperature and humidity environment for the passenger cabin. The existing heat management system generally adopts a discrete or simple serial architecture, namely, circuits such as electric motor cooling, battery heat management, air conditioner warm air and the like are independent or are coupled only through a simple heat exchanger. These systems achieve basic cooling and heating functions through a combination of a plurality of solenoid valves, water pumps, radiators, and the like. The prior art has the following disadvantages when in use: The system has a complex structure and high cost, and the traditional architecture needs a large number of independent valves, pipelines, sensors and controllers to realize the on-off and switching of the fluid of different loops, so that the system has high hardware cost, complex assembly, large occupied space and more potential leakage and fault points. The energy utilization rate is low, the waste is serious, and each loop is relatively independent, so that the heat cannot be flexibly and efficiently allocated in the whole system. For example, a large amount of waste heat generated by the drive motor during operation is directly discharged into the atmosphere through the radiator under most working conditions, resulting in great waste of energy. The low-temperature performance is poor, and the cruising is influenced, namely, under the low-temperature environment in winter, a large amount of electric energy is consumed for battery heat preservation and cabin heating (mainly through a PTC heater), the existing system is insufficient in waste heat recycling, so that the energy consumption in winter is increased rapidly, and the cruising mileage is seriously reduced. The system has the advantages of single functional mode and poor adaptability, and the simple serial-parallel structure limits the achievable operation modes of the system, is difficult to cope with complex environment temperature and driving conditions, and cannot realize efficient compound type such as 'motor waste heat is used as a heat pump heat source'. The traditional design scheme is relatively fixed, and gradual improvement of functions is difficult to realize by increasing and decreasing a small number of components on the same basic framework, so that the platform development and modularized development are not facilitated, and the requirements of vehicle types with different cost and performance positioning cannot be met. Therefore, the five-way valve-based step-by-step enhanced integrated thermal management system for the pure electric vehicle is designed and used for providing another technical scheme for the technical problems. Disclosure of Invention Based on this, it is necessary to provide a five-way valve-based step-by-step enhanced integrated thermal management system for a pure electric vehicle to solve the technical problems set forth in the background art. In order to solve the technical problems, the invention adopts the following technical scheme: five-way valve-based step-by-step enhanced pure electric vehicle integrated thermal management system comprises: The valves are used for realizing loop circulation through the control of the valves; the valve is at least one of a first five-way valve, a first three-way valve and a four-way valve; The passenger cabin heating loop is used for communicating the first five-way valve to heat the passenger cabin; An electric drive intelligent temperature control loop flows out from an opening a of a first five-way valve, is driven by a motor water pump and cools Mcu and auxiliary drive four-in-one electric drive components; and the battery thermal management loop is used for realizing active heating and active refrigeration of the battery pack. As a preferred embodiment of the integrated thermal management system for the pure electric vehicle based on the five-way valve step-by-step enhancement, the integrated thermal management system further comprises a second five-way valve 24 and a second three-way valve 26; the passenger cabin heating loop and the battery heating loop are reconstructed through the second five-way valve 24 as follows: The passenger cabin heating loop flows out from the port b of the second five-way valve 24, sequentially passe