Electric vehicle thermal management system, method and apparatus
A thermal management system and technology for electric vehicles, applied in the field of electric vehicle thermal management systems, can solve problems such as the inability of external heat exchangers to work stably, system performance degradation, and thermal management efficiency reduction, so as to improve thermal management efficiency and system performance. Stable and guarantee the effect of system performance
Active Publication Date: 2019-05-14
HUAWEI TECH CO LTD
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Problems solved by technology
[0006] This application provides a thermal management system, method and device for an electric vehicle, which is used to solve the problem that in the prior art, when the external environment temperature is low, the heat exchanger outside the vehicle will not be able to work stably due to frosting, resulting in a decrease in system performance. The problem of reduced thermal management efficiency
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[0170] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0171] Before introducing the embodiments of the present invention in detail, the application scenarios and implementation environments involved in the embodiments of the present invention are briefly introduced.
[0172] First, the application scenarios involved in the embodiments of the present invention are briefly introduced.
[0173] In real life, since the battery in an electric vehicle usually has a battery operating temperature, the battery operating temperature includes a maximum operating temperature and a minimum operating temperature, therefore, it is necessary to perform thermal management on the battery of the electric vehicle. Further, as the outdoor temperature changes, people may have different requirements for t...
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The invention discloses an electric vehicle thermal management system, method and apparatus, belonging to the technical field of electric vehicles. The electric vehicle thermal management system is characterized in that the first end of a compressor in the system is connected to an exterior heat exchanger through a reversing valve, and a stop valve is arranged on a connecting passage with the exterior heat exchanger; the second end of the compressor is connected to a battery heat exchanger through the reversing valve, and a stop valve is arranged on the connecting passage; the exterior heat exchanger is connected with an electric heater and a heat exchanger in turn; the heat exchanger is connected to the battery heat exchanger through an expansion valve, and the heat exchanger is in parallel connection with a power system liquid cooling loop through a three-way valve; the system realizes thermal management of the battery by controlling the reversing valve, each stop valve and each expansion valve; and in the thermal management process, the exterior heat exchanger is heated by controlling the three-way valve and/or the electric heater when the exterior heat exchanger is required tobe heated. The electric vehicle thermal management system can achieve the defrosting effect, so that the exterior heat exchanger can work stably to ensure the stability of the system performance and improve the thermal management efficiency.
Description
technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a thermal management system, method and device for electric vehicles. Background technique [0002] Compared with traditional fuel vehicles, because electric vehicles use batteries as power sources, they have the characteristics of energy saving and environmental protection, which has become a trend in the development of automobiles. In practical application scenarios, it is usually necessary to perform thermal management on management objects such as the cabin, battery and power system, so that the temperature of these objects can be maintained within the operating temperature range. For example, this thermal management includes cooling and heating management, Wherein, the power system includes but not limited to a motor, a motor controller, and a power device. [0003] In related technologies, in order to realize the thermal management of electric vehicles,...
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IPC IPC(8): B60H1/00B60H1/32
Inventor 胡浩茫莫维赵晓鹏
Owner HUAWEI TECH CO LTD
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