Rapid temperature increase control method for vehicle power battery

Abstract

The invention provides a rapid temperature increase control method for a vehicle power battery. A first control plate is used for acquiring battery pack total voltage, battery pack total current, battery pack module voltage, and battery pack temperature in real time; according to the battery pack total voltage, the battery pack total current and the battery pack module voltage, battery pack SOC isestimated in real time; a second control plate, according to the size of the initial battery pack SOC, controls an engine to pull a motor or the motor to positively drive for charging / discharging thebattery; then the battery is charged / discharged repeatedly, so that the SOC of the battery pack is maintained to between a second limit value (B) and a first limit value (A) always until the temperature of the battery pack is higher than -10 DEG C, thereby satisfying power demand of the whole vehicle. The method is simple and available, is high in temperature increase speed of the battery, and has relative consistency on battery temperature.

Description

technical field [0001] The invention relates to a method for controlling rapid temperature rise of a vehicle power battery. Background technique [0002] As an important part of new energy vehicles, the power battery pack will determine its charge and discharge capacity due to the low temperature characteristics of the battery itself during use in an extremely cold environment, making the battery temperature low, and the power battery pack cannot be used normally. The fuel consumption increases, which requires an additional thermal management solution to quickly heat up the battery, thereby rapidly improving the power of the power battery pack. Although this can quickly increase the battery temperature, it requires additional cost of parts and components. The cost is high, which is not conducive to long-term development. ; In the prior art, for the rapid temperature rise control of the battery pack, the battery is usually heated by adding a battery heating device, which cons...

AI Technical Summary

Problems solved by technology

[0002] As an important part of new energy vehicles, the power battery pack will determine its charge and discharge capacity due to the low temperature characteristics of the battery itself during use in an extremely cold environment, making the battery temperature low, and the power battery pack cannot be used normally. The fuel consumption increases, which requires an additional thermal management solution to quickly heat up the battery, thereby quickly improving the power of the power battery pack. Although this can quickly increase the battery temperature, it requires additional cost of parts and components. The cost is high, which is not conducive to long-term development. ; In the prior art, for the rapid temperature rise control of the battery pack, the battery is usually heated by adding a battery heating device, which consumes a large part of energy, which is a challenge to the economy of the whole vehicle, and During the heating process of the battery, it will cause uneven heating between the batteries, which will cause the battery to age, and ultimately affect the performance of the battery pack and the life of the battery pack