CN-121989621-A - Thermal management system, operation method of thermal management system and vehicle using thermal management system

CN121989621ACN 121989621 ACN121989621 ACN 121989621ACN-121989621-A

Abstract

The invention discloses a thermal management system, an operation method of the thermal management system and a vehicle applying the thermal management system, and relates to the technical field of thermal management systems, wherein the thermal management system selectively enters one of the following operation modes: cab cooling mode, battery cooling mode, cab and battery cooling mode, battery heating mode, battery self-circulation heat dissipation mode, electric energy conversion part heat dissipation mode, battery and electric energy conversion part low temperature heat dissipation mode, cab heating mode and waste heat utilization type battery heating mode. The invention mainly solves the problem of how to provide a thermal management system for a new energy automobile, and has the characteristics of high integration degree, rich functions, multiple operation modes, high reliability, good controllability, high electricity utilization efficiency and good economy, thereby improving the performance, stability, comfort and service life of the automobile.

Inventors

LIU ZHONGQIANG
ZHENG YUJIE
QIAO JUNHAO
Tang Zeliang
YANG SHUANGFA
LI JINQIANG
XIE SHIJIAN
CHEN QIANFA

Assignees

东莞市深合电气有限公司

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. A thermal management system for use with a vehicle including at least a battery pack, an electrical energy conversion component, and an engine; the heat management system is characterized by comprising a refrigerant circulation module, a liquid cooling medium circulation module, an engine waste heat utilization circulation module, a cab air conditioning module and a main fan; The refrigerant circulation module at least comprises a compressor, a condenser, a first throttling device, a cab air-conditioning evaporator, a second throttling device and an evaporation heat exchanger, wherein the compressor, the condenser, the first throttling device and the cab air-conditioning evaporator of the refrigerant circulation module are sequentially and circularly communicated to form a first refrigerant circulation branch; The liquid cooling medium circulation module at least comprises a battery side water pump, a heating device, a liquid heat exchanger, an electric energy side water pump and an air radiator; The liquid cooling medium circulation module is provided with: the battery pack independent heat management loop is formed by sequentially and circularly communicating the battery side water pump, the heating device, the liquid heat exchanger, the liquid cooling medium channel of the evaporation heat exchanger and the liquid cooling medium channel of the battery pack; the electric energy conversion component independent heat management loop is formed by sequentially and circularly communicating the electric energy side water pump, the air radiator and the liquid cooling medium channel of the electric energy conversion component; the battery pack and the electric energy conversion component are connected in series with a heat management loop, wherein the heat management loop is formed by sequentially and circularly communicating a battery side water pump, a liquid cooling medium channel of the electric energy conversion component, the electric energy side water pump, the air radiator, the heating device, the liquid heat exchanger, a liquid cooling medium channel of the evaporation heat exchanger and a liquid cooling medium channel of the battery pack; the engine waste heat utilization and circulation module at least comprises a warm air heat exchange core body; The engine waste heat utilization cycle module is provided with: the cab heating loop is formed by introducing a liquid cooling medium of the engine into the warm air heat exchange core; the waste heat utilization type battery pack heating loop is formed by introducing a liquid cooling medium of the engine into the liquid heat exchanger; the cab air conditioning evaporator of the refrigerant circulation module and the warm air heat exchange core of the engine waste heat utilization circulation module are both positioned in the cab air conditioning module; The main fan can perform forced convection on the condenser of the refrigerant circulation module and/or the air radiator of the liquid cooling medium circulation module.
2. The thermal management system of claim 1, wherein the refrigerant circulation module further comprises a first refrigerant tee and a second refrigerant tee; The compressor, the condenser, the port a and the port b of the first refrigerant three-way pipe, the first throttling device, the cab air conditioner evaporator and the port b and the port a of the second refrigerant three-way pipe are sequentially and circularly communicated to form a first refrigerant circulation branch; The compressor, the condenser, the port a and the port c of the first refrigerant three-way pipe, the second throttling device, the refrigerant channel of the evaporation heat exchanger, the port c and the port a of the second refrigerant three-way pipe are sequentially and circularly communicated to form a second refrigerant circulation branch.
3. The thermal management system of claim 1 or 2, wherein the refrigerant circulation module further comprises a gas-liquid separator; The gas-liquid separator is connected to the low pressure side of the compressor.
4. The thermal management system of claim 1, wherein the liquid-cooled medium circulation module further comprises a liquid-cooled medium four-way valve; the liquid-cooled medium four-way valve comprises an a port, a b port, a c port and a d port which can be selectively opened/closed; The battery pack independent heat management loop is formed by sequentially and circularly communicating a battery side water pump, a c port and a b port of the liquid cooling medium four-way valve, the heating device, the liquid heat exchanger, a liquid cooling medium channel of the evaporation heat exchanger and a liquid cooling medium channel of the battery pack; The independent heat management loop of the electric energy conversion component is formed by sequentially and circularly connecting the electric energy side water pump, the air radiator, an a port and a d port of the liquid cooling medium four-way valve and a liquid cooling medium channel of the electric energy conversion component; The battery pack and the electric energy conversion component serial connection type thermal management loop is formed by sequentially and circularly communicating a battery side water pump, a c port and a d port of the liquid cooling medium four-way valve, a liquid cooling medium channel of the electric energy conversion component, the electric energy side water pump, the air radiator, an a port and a b port of the liquid cooling medium four-way valve, the heating device, the liquid heat exchanger, a liquid cooling medium channel of the evaporation heat exchanger and a liquid cooling medium channel of the battery pack.
5. The thermal management system of claim 1 or 4, wherein the liquid-cooled medium four-way valve further comprises a first expansion tank and a second expansion tank; the first expansion kettle is connected at any node of the independent thermal management loop of the battery pack; The second expansion kettle is connected at any node of the independent heat management loop of the electric energy conversion component.
6. The thermal management system of claim 1, wherein the engine waste heat utilization cycle module further comprises a liquid-cooled medium three-way valve, a liquid-cooled medium one-way valve, and a liquid-cooled medium three-way pipe; the waste heat utilization type battery pack heating loop is formed by sequentially and circularly communicating a liquid cooling medium channel of the engine, the liquid cooling medium three-way valve, the liquid heat exchanger, the liquid cooling medium one-way valve and the liquid cooling medium three-way pipe.
7. The thermal management system of claim 1, wherein the cab air conditioning module further comprises a cab blower; the cab fan can perform forced convection on the cab air conditioner evaporator of the refrigerant circulation module and/or the warm air heat exchange core of the engine waste heat utilization circulation module.
8. A method of operating a thermal management system, as defined in any one of claims 1 to 7, The method comprises the following steps: Selectively entering one of the following operating modes based on at least one operating condition signal of the vehicle and/or the thermal management system: A cab refrigeration mode, in which a compressor and a first throttling device of the refrigerant circulation module are started to start a first refrigerant circulation branch; A battery pack refrigeration mode, which is to start a compressor and a second throttling device of the refrigerant circulation module to start a second refrigerant circulation branch, and start a battery side water pump of the liquid cooling medium circulation module to start an independent thermal management loop of the battery pack; a cab and a battery pack refrigerating mode, wherein a compressor, a first throttling device and a second throttling device of the refrigerant circulating module are started to simultaneously start the first refrigerant circulating branch and the second refrigerant circulating branch, and a battery side water pump of the liquid cooling medium circulating module is started to start an independent thermal management loop of the battery pack; A battery pack heating mode, namely starting a battery side water pump of the liquid cooling medium circulation module to start an independent thermal management loop of the battery pack and starting a heating device of the liquid cooling medium circulation module; A battery pack self-circulation heat dissipation mode, namely starting a battery side water pump of the liquid cooling medium circulation module to start an independent heat management loop of the battery pack; the electric energy conversion part heat dissipation mode is that an electric energy side water pump of the liquid cooling medium circulation module is started to start an independent heat management loop of the electric energy conversion part, and the main fan is selectively turned on/off; starting a battery side water pump and an electric energy side water pump of the liquid cooling medium circulation module to start a thermal management loop of the battery pack and the electric energy conversion component in series, wherein the main fan is selectively turned on/off; A cab heating mode, namely introducing a liquid cooling medium of an engine into a warm air heat exchange core of an engine waste heat utilization circulation module to start a cab heating loop; And the residual heat utilization type battery pack heating mode is to start a battery side water pump of the liquid cooling medium circulation module to start an independent battery pack heat management loop, and to introduce the liquid cooling medium of the engine into a liquid heat exchanger to start the residual heat utilization type battery pack heating loop.
9. The method of claim 8, wherein the liquid-cooled medium circulation module further comprises a liquid-cooled medium four-way valve; the liquid-cooled medium four-way valve comprises an a port, a b port, a c port and a d port which can be selectively opened/closed; The battery pack independent heat management loop is formed by sequentially and circularly communicating a battery side water pump, a c port and a b port of the liquid cooling medium four-way valve, the heating device, the liquid heat exchanger, a liquid cooling medium channel of the evaporation heat exchanger and a liquid cooling medium channel of the battery pack; The independent heat management loop of the electric energy conversion component is formed by sequentially and circularly connecting the electric energy side water pump, the air radiator, an a port and a d port of the liquid cooling medium four-way valve and a liquid cooling medium channel of the electric energy conversion component; The battery pack and the electric energy conversion component serial connection type thermal management loop is formed by sequentially and circularly communicating a battery side water pump, a c port and a d port of the liquid cooling medium four-way valve, a liquid cooling medium channel of the electric energy conversion component, the electric energy side water pump, the air radiator, an a port and a b port of the liquid cooling medium four-way valve, the heating device, the liquid heat exchanger, a liquid cooling medium channel of the evaporation heat exchanger and a liquid cooling medium channel of the battery pack; When the battery pack cooling mode, the cab and battery pack cooling mode, the battery pack heating mode, the battery pack self-circulation heat dissipation mode and the waste heat utilization type battery pack heating mode are adopted, the c port and the b port of the liquid cooling medium four-way valve are communicated with each other; In the heat dissipation mode of the electric energy conversion component, an a port and a d port of the liquid-cooling medium four-way valve are communicated with each other; And in the low-temperature heat radiation mode of the battery pack and the electric energy conversion component, the port c and the port d of the liquid-cooling medium four-way valve are communicated with each other, and the port a and the port b of the liquid-cooling medium four-way valve are communicated with each other.
10. A vehicle comprising the thermal management system of any one of claims 1-7.

Description

Thermal management system, operation method of thermal management system and vehicle using thermal management system Technical Field The invention relates to the technical field of thermal management systems, in particular to a thermal management system, an operation method of the thermal management system and a vehicle using the thermal management system. Background The battery pack, the motor and the controller of the new energy automobile taking the motor as one of driving force can generate a large amount of heat, heat dissipation is needed in a high-temperature environment, otherwise, the performance, the safety and the service life of the new energy automobile are influenced, the low-temperature environment is extremely easy to influence the endurance of the battery pack, so that the battery pack of the new energy automobile is needed to be subjected to heat preservation/heating treatment in the low-temperature environment, meanwhile, the cab of the new energy automobile also has temperature control requirements (namely air conditioning refrigeration and heating), and the waste heat of a generator of the new energy automobile (such as a hybrid electric automobile or an extended-range automobile) provided with an engine is energy which can be utilized. Based on the above considerations, new energy automobiles are generally configured with a thermal management system to achieve the temperature control of each region, wherein the liquid cooling type thermal management system is a thermal management system scheme widely applied to the field of new energy automobiles. In the prior art, a part of the new energy automobile is provided with independent heat management systems (at least comprising a plurality of refrigerating devices and a plurality of liquid cooling waterways) for the battery pack, the motor and the controller respectively, so that the problems of overlarge energy consumption, high system complexity and overlarge weight of the whole automobile are obviously caused, and the new energy automobile also comprises a part of the new energy automobile, wherein a set of refrigerating devices are used as cores of the heat management systems, and the independent liquid cooling waterways are respectively provided for the battery pack, the motor, the controller and other parts, so that the energy consumption and the weight of the whole automobile can be reduced to a certain extent, but the system complexity is not effectively reduced, and the new energy automobile still has higher energy consumption and the weight of the whole automobile. In summary, how to provide a thermal management system with excellent thermal management performance, rich and controllable functional modes, high integration level and low energy consumption for a new energy automobile is a problem to be solved. Disclosure of Invention The object of the present invention is to provide a thermal management system, a method of operating a thermal management system and a vehicle using the same, In order to achieve the above purpose, the invention provides a thermal management system which is applied to a vehicle, wherein the vehicle at least comprises a battery pack, an electric energy conversion component and an engine; the heat management system comprises a refrigerant circulation module, a liquid cooling medium circulation module, an engine waste heat utilization circulation module, a cab air conditioning module and a main fan, wherein the refrigerant circulation module at least comprises a compressor, a condenser, a first throttling device, a cab air conditioning evaporator, a second throttling device and an evaporation heat exchanger, the compressor, the condenser, the first throttling device and the cab air conditioning evaporator of the refrigerant circulation module are sequentially and circularly communicated to form a first refrigerant circulation branch, refrigerant channels of the compressor, the condenser, the second throttling device and the evaporation heat exchanger of the refrigerant circulation module are sequentially and circularly communicated to form a second refrigerant circulation branch, the first refrigerant circulation branch and the second refrigerant circulation branch can respectively perform refrigeration circulation, the liquid cooling medium circulation module at least comprises a battery side water pump, a heating device, a liquid heat exchanger, an electric energy side water pump and an air radiator, the liquid cooling medium circulation module is provided with a battery pack independent heat management loop, the battery pack independent heat management loop comprises the battery side water pump, the heating device, the liquid cooling medium channels of the evaporation heat exchanger and the battery medium circulation branch, the electric energy side water pump and the heat exchanger are sequentially and circularly communicated to form a heat management loop, and the heat exchange loop comprises a battery