Hybrid vehicle battery warming-up method

Abstract

The invention discloses a battery warm-up method for hybrid cars, and the method is that when the temperature of a car battery is lower, the battery can be recharged or discharged with small capacity to increase the internal temperature of the battery, so that the battery can work within the best using temperature range. The main steps are as follows: the temperature of storage batteries is checked and the car running state is determined; the SOC of the storage batteries is checked, if the SOC is lower than some set value, the rotating speed of an engine is increased in order to drive a hybrid motor to recharge the storage batteries; and if the SOC is higher than some set value, the storage batteries provide electricity for the hybrid motor to drive the engine until the electric energy is consumed to be lower than some set value, then the rotating speed of the engine is increased in order to drive the hybrid motor to recharge the storage batteries. The method makes use of the recharging or discharging work on the car storage batteries, so that the battery temperature is increased to the appropriate temperature without adding any hardware, and the method is simple and effective, and has high operability and practicability.

Description

technical field [0001] The invention relates to a method for using a battery, in particular to a warm-up method for keeping the temperature of a power battery higher than a certain threshold in a hybrid electric vehicle so that the battery can obtain high efficiency and life. Background technique [0002] A hybrid vehicle travels by driving force from at least one of an engine such as an internal combustion engine and an electric motor such as a rotary electric machine. The engine and the electric motor of the hybrid vehicle are selectively used according to the running state of the vehicle to effectively utilize the respective characteristics of the engine and the electric motor. Hybrid vehicles generally consume less fuel and emit less exhaust gas (exhaust gas) than vehicles that run with only an engine. The power battery is a very important part of a hybrid vehicle. There is evidence that power batteries can obtain higher efficiency and longer service life only in certa...

AI Technical Summary

Problems solved by technology

China Invention Patent Application No. 200610137882.1 discloses an integrated power supply control platform for hybrid vehicles. In this platform, a cooling system is provided to ensure that the battery works below a certain temperature. The temperature may be too low, especially in cold places / times, such as when you wake up in the morning and start the engine the next day in winter, or in crowded streets / intersections, the vehicle moves slowly or even stagnates for a long time, the power battery Due to the low frequency of use, the temperature becomes very low due to heat dissipation, etc.

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