Control method for battery heating

Abstract

The invention discloses a battery heating control method. The control method comprises the following steps: a controller acquires the residual mileage and the unit mileage power consumption of the running mileage, and then calculates the electric energy required by the residual mileage; the controller acquires the discharge rate mean value of a battery in the running mileage; the controller judges whether the residual electric quantity of the battery can meet the requirement of the residual mileage or not according to the electric energy required by the residual mileage, the discharge rate mean value and the residual electric quantity of the battery at the current temperature; if the residual electric quantity of the battery can meet the requirement of the residual mileage, the battery does not need to be heated; and if the residual electric quantity of the battery can not meet the requirement of the residual mileage, the controller calculates the set temperature of the battery to be heated according to the added value of the electric quantity of the battery, acquired by heating, and the controller controls an electric heater at the battery to heat the battery to the preset temperature. The control method can relatively accurately evaluate the temperature of the battery to be heated, can not waste the electric energy required by heating, is safe and reliable, and can meet the requirement of the endurance mileage of an electric vehicle.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for controlling battery heating. Background technique [0002] At present, electric vehicles are popularized rapidly in some areas, but their mileage is significantly shortened at low temperatures. A large part of the reason is that the low-temperature activity of batteries is poor and the effective capacity is reduced. [0003] Therefore, the battery needs to be heated during charging to ensure that its effective capacity can meet the needs of the next trip, but the energy consumption of the next trip is not completely determined by the specific customer, which is a basic premise. [0004] In addition, the battery needs to be kept at a certain temperature while driving. At least the battery needs to be heated when the battery needs to release its due power at the end. You can heat the battery to 18, 20 or 25 degrees Celsius at will. If the temperature reached by heat...

AI Technical Summary

Problems solved by technology

[0004] In addition, the battery needs to be kept at a certain temperature while driving. At least the battery needs to be heated when the battery needs to release its due power at the end. You can heat the battery to 18, 20 or 25 degrees Celsius at will. If the temperature reached by heating is too high, the battery power will be wasted. In addition, if the battery temperature is too high, its effective capacity exceeds the demand for vehicle operation. High temperatures such as 28, 30, and 35 degrees Celsius will also cause a certain degree of damage to the battery, especially its life, and even cause the battery to overheat and cause the danger of combustion and explosion

Therefore, in the second half of driving, if the battery energy can meet the destination, the battery does not need to be heated; if the electric energy in the battery cannot meet the needs of reaching the destination under the current low temperature condition, the battery needs to be heated; but heated to What degree is cost-effective, there is no good solution in the industry

Images