Temperature control method for battery pack of hybrid electric vehicle

Abstract

The invention discloses a temperature control method for the battery pack of a hybrid electric vehicle, wherein a heating device is arranged for the battery pack, and the heating device is connected with a vehicle controller through a CAN bus; when the temperature of the battery pack is higher than a predetermined heating device opening threshold or closing threshold, the vehicle controller controls the heating device to stop heating; when the temperature of the battery pack is higher than a predetermined heating device opening threshold or closing threshold, the heating device stops heating;The vehicle controller controls the heating device to turn on heating when the battery pack temperature is lower than a predetermined heating device turning on threshold or turning off threshold. A method for heat a battery pack in winter or in a low temperature environment, keeping the battery pack at an efficient operating temperature, The invention improves the efficiency of the battery, enables the vehicle to realize the accelerating power of the motor all-weather, and realizes the efficient energy recovery and parallel charging, maintains the electric quantity balance and prolongs the battery life, is not affected by the changes of the season and the temperature, and greatly improves and expands the driving experience of the user and the application range of the vehicle.

Description

technical field [0001] The invention relates to a control method, in particular to a temperature control method for a battery pack of a hybrid electric vehicle. Background technique [0002] A battery pack, an electric motor, and an engine are provided in a hybrid vehicle. [0003] In the existing technology, especially when the temperature is low in winter in the north, the efficiency of the battery pack is greatly reduced, which cannot meet the power demand for acceleration and boosting, and the performance of energy recovery and parallel charging is also greatly reduced, making the hybrid electric vehicle in one year. Most of the time, the motor is in a state of no power assistance, which greatly affects the performance of the hybrid vehicle system, and the driving experience is extremely poor. Contents of the invention [0004] Aiming at the drawbacks of the prior art, the invention provides a method for controlling the temperature of a battery pack of a hybrid electr...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, especially when the temperature is low in winter in the north, the efficiency of the battery pack is greatly reduced, which cannot meet the power demand for acceleration and boosting, and the performance of energy recovery and parallel charging is also greatly reduced, making the hybrid electric vehicle in one year. Most of the time is in the state of no power assistance from the motor, which greatly affects the performance of the hybrid vehicle system, and the driving experience is extremely poor

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