Method and system for controlling battery temperature of electric vehicle

Abstract

The invention discloses a method and a system for controlling battery temperature of an electric vehicle. The method comprises the steps of: when a first preset condition and a second preset condition are met, acquiring a temperature signal on an air outlet of a vehicle battery, wherein the first preset condition is that the air inlet temperature of a battery pack is within a preset temperature range, the second preset condition is that after the air inlet temperature is acquired, time is delayed by a period, and the period is the time on flowing from the air inlet to the air outlet by air; judging whether the temperature of the air outlet is larger than a preset temperature at normal temperature or not, if so, opening a heat radiating air duct; or else, starting a heating board. The method and the system for controlling the battery temperature of the electric vehicle not only can be used for radiating heat for the battery in hot weather, but also can be used for heating the battery in cold weather; and meanwhile, the method and the system can intelligently judge whether ambient temperature is suitable for driving or not and carry out corresponding treatment, and can guarantee the battery to work in a comparatively appropriate operation environment to a certain extent.

Description

technical field [0001] The present application relates to the technical field of automobile batteries, in particular to a method and system for controlling the temperature of electric automobile batteries. Background technique [0002] An electric vehicle is a vehicle powered by an on-board power supply, and the motor drives the wheels. At present, the on-board power supply used in electric vehicles is usually a storage battery. Lithium batteries have the advantages of high specific energy (specific energy refers to the energy per unit weight or unit volume), long service life, high rated voltage, and low self-discharge rate. And widely used in electric vehicles. However, the temperature control and management of lithium batteries in electric vehicles is still far from perfect. Therefore, there is an urgent need for a method and system for controlling the temperature of automotive batteries to ensure that the temperature field of automotive batteries is uniform during use, ...

AI Technical Summary

Problems solved by technology

However, at present, the temperature control and management of lithium batteries in electric vehicles is still far from perfect. Therefore, there is an urgent need for a method and system for controlling the temperature of automotive batteries to ensure that the temperature field of automotive batteries is uniform during use, so that automotive batteries can work in a more suitable environment.

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