Electric vehicle thermal management control method and system

Abstract

The invention discloses an electric vehicle heat management control method and an electric vehicle heat management control system. The electric vehicle heat management control method comprises the following steps: performing temperature detection, namely detecting and recording the temperature of a battery or a battery core; performing temperature judgment, namely judging whether the temperature of the battery or the battery core is within a high-temperature working temperature range; if the temperature of the battery or the battery core is within the high-temperature working temperature range, executing temperature comparison; performing temperature comparison, namely comparing the current temperature with the last temperature; if the current temperature is higher than the last temperature, executing a cooling operation; cooling, namely proportionally increasing the rotation speed of a power component of cooling equipment; repeating the former step until the power component of the cooling equipment is in full-speed operation. According to the electric vehicle heat management control method and the electric vehicle heat management control system, through setting of an adjusting proportion, the rotation speed of the power component of the cooling equipment is increased according to the set proportion, and the adjusting proportion can be revised to the optimal adjusting proportion according to an actual situation, an optimal operating state of the whole equipment is met and the energy consumption is lowered; the before and after temperatures of the battery core are compared,the power of the cooling equipment is timely adjusted for cooling, the battery is adjusted to the optimal working temperature range in the most energy-saving way, and the energy consumption is loweredwhile the working efficiency of the battery is improved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a thermal management method and system for an electric vehicle. Background technique [0002] In the existing electric vehicle thermal management control method, the control of the cooling equipment mainly adopts the three-stage time control method. When the cell temperature reaches a, the first gear speed is used; when the cell temperature reaches b, the second gear speed is used; When the cell temperature reaches c, the 3rd gear speed is used to control the cell temperature; however, this control is not intelligent, resulting in waste of electric energy, loud noise, and reduced driving experience for passengers. [0003] If it is assumed that the maximum working temperature of the battery cell needs to be controlled below 40C, when the speed of the water pump / fan is used to block a, the temperature of the battery cell is 42C, which still exceeds the standard 40C. Therefore, it ...

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Problems solved by technology

[0002] In the existing electric vehicle thermal management control method, the control of the cooling equipment mainly adopts the three-stage control method. When the temperature of the battery core reaches a, the first gear speed is used; when the battery temperature reaches b, the second gear speed is used; When the temperature of the battery core reaches c, use the 3rd gear speed to control the temperature of the battery core; but this control is not intelligent, resulting in waste of electric energy, high noise, and poor driving experience for passengers

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