Electric vehicle thermal management method and system
A thermal management system and electric vehicle technology, applied in the field of electric vehicle thermal management methods and systems, can solve problems affecting battery life of electric vehicles, etc.
Active Publication Date: 2021-02-26
VOYAH AUTOMOBILE TECH CO LTD
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Problems solved by technology
[0005] The embodiment of the present application provides a thermal management method and system for an electric vehicle to solve the problem that the residual heat of the motor in the related art cannot heat the battery to an ideal temperature under all driving conditions, so that the battery has a good discharge capacity. May affect the battery life of electric vehicles
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[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.
[0042] The embodiment of the present application provides a thermal management method for electric vehicles, which can solve the problem that the waste heat of the motor in the related art cannot heat the battery to an ideal temperature under all driving conditions, so that the battery has a good discharge capacity. It may affect the ba...
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The invention relates to an electric vehicle thermal management method and system, and the method comprises the following steps: obtaining the operation state of an electric vehicle, wherein the operation state comprises a short-distance state and a long-distance state; in a short-distance state, if the temperature of the battery is lower than a set heating temperature, using the waste heat of themotor to heat the battery; in a long-distance state, if the battery is in a first state, heating the battery to a second temperature by using an electric heater PTC, otherwise, heating the battery toa temperature not lower than a set heating temperature by using motor waste heat, wherein the first state is that the temperature of the battery is between the first temperature and the second temperature, and the SOC (State Of Charge) of the battery is in a set low-electric-quantity critical interval. According to the application, the problem that the battery cannot be heated to an ideal temperature by the waste heat of the motor in all driving states in the prior art, so that the battery has very good discharge capacity, and the endurance of the electric vehicle is possibly influenced can be solved.
Description
technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a method and system for thermal management of electric vehicles. Background technique [0002] As countries around the world pay more and more attention to environmental and energy issues, pure electric vehicles have been widely favored by all walks of life. However, the development of pure electric vehicles is still in its infancy, and there are many key problems to be solved. Constraints on the technical maturity of the management system. An excellent vehicle thermal management system has a very significant contribution to reducing battery energy consumption, increasing cruising range, and improving vehicle reliability and comfort. [0003] Electric vehicles have been pursuing high battery life. All the heat on pure electric vehicles ultimately comes from the electricity output by the battery. The efficiency of the motor and motor controller for battery pow...
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Login to View More IPC IPC(8): B60L58/27B60H1/03B60H1/00
CPCB60L58/27B60H1/034B60H1/00278B60H1/00392B60H2001/00307Y02T10/70
Inventor 王文龙常海涛马德慧张永仁周通
Owner VOYAH AUTOMOBILE TECH CO LTD