Cooling control system and method for power battery of hybrid electric vehicle

Abstract

The invention relates to a cooling control system for a power battery of a hybrid electric vehicle. By adoption of the cooling control system, influence of the vehicle operation working condition to the battery pack cooling is analyzed and evaluated comprehensively; and air cooling, water cooling and compressor refrigerating are controlled to realize in-time and effective cooling by virtue of integration of the working environment temperature of the battery pack, the residual electric quantity of the battery and the battery output power according to different requirements in battery cooling, so that compatibility and part sharing with the conventional automobile thermal management system are realized, and power consumption management can be realized easily. The invention also relates to a cooling control method for the power battery of the hybrid electric vehicle; the cooling control method comprises three cooling modes, including a natural water cooling mode, a fan water cooling mode and a forced cooling mode, so that requirements of different levels in battery pack cooling can be satisfied, stable transition of different cooling modes can be realized, and energy-saving design of the system is also taken into consideration.

Description

technical field [0001] The invention relates to a temperature control technology of a power battery, in particular to a cooling control system and method for a power battery of a hybrid electric vehicle. Background technique [0002] The power battery will generate heat during charging and discharging. If the heat cannot be dissipated in time under high temperature conditions, it will not only affect its working efficiency, but also affect its service life, and even cause safety hazards. [0003] The power battery thermal management system of hybrid electric vehicles uses air cooling, water cooling or oil cooling to cool the battery pack. The air cooling method does not require complex pipeline layout, but the heat dissipation capacity is limited, the heat dissipation is uneven, and the design requirements for the overall structure of the engine compartment are high. The oil cooling method can dissipate heat evenly, and the heat dissipation capacity is also good, but the de...

AI Technical Summary

Problems solved by technology

The operating conditions of the car are complex and changeable, which has a great impact on the cooling control of the battery pack. For example, the ambient temperature of the battery is an important factor affecting the heating and cooling of the battery. The power battery has a high requirement for the working environment. It is difficult for one refrigeration method to meet the cooling needs under various working conditions

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