Method for determining coolant control parameters for electric vehicle power battery

Abstract

The invention discloses a method for determining coolant control parameters for an electric vehicle power battery. The method comprises the steps of correcting a simulation model by using a physical thermal management rack system of the electric vehicle power battery; and determining the coolant control parameters of the electric vehicle power battery under different factors and levels by adopting the corrected simulation model and an orthogonal experiment method. The optimal coolant control parameters of the electric vehicle power battery under different factors and levels are determined by adopting the orthogonal experiment method for combination of multiple factors and multiple levels, so that the accuracy of the simulation test result is ensured, the test frequency is reduced, the test period is shortened, the research and development progress of the electric vehicle is increased, the research and development cost of the electric vehicle is reduced, the optimal coolant control parameters under the multiple factors and levels and on the premise of ensuring the target of low consumption level are ensured, and a reliable test basis is provided for good control on the temperature of the electric vehicle power battery and reduction of the consumption.

Description

technical field [0001] The invention relates to the field of thermal management of electric vehicles, in particular to a method for determining control parameters of cooling liquid of power batteries of electric vehicles. Background technique [0002] Lithium-ion batteries are the first choice for electric vehicle power batteries. The suitable operating temperature range of lithium-ion batteries is 10°C to 30°C, while the operating temperature range of electric vehicles is -30°C to 50°C. It can be seen that the suitable operating temperature range of lithium-ion batteries is far narrower than that of electric vehicles. [0003] Electric vehicles are different from traditional vehicles. The power battery of an electric vehicle is the source of power for all energy input in the vehicle. In order to ensure that electric vehicles can have a long enough mileage and a good driving experience for a single charge, and ensure that the power battery has a long enough service life, th...

AI Technical Summary

Problems solved by technology

In order to control the temperature of the lithium-ion power battery, regardless of the working conditions of the lithium-ion power battery, only a cold liquid medium is introduced in the case of overheating, and a hot liquid medium is introduced in the case of overcooling, which will also cause the entire vehicle Waste of energy, as mentioned earlier, the power battery of an electric vehicle is the power source of all energy input for the whole vehicle, and this method of not controlling the temperature of the liquid medium will also shorten the mileage of an electric vehicle on a single charge

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