Thermal management energy-saving control system for battery of pure electric vehicle

Abstract

The invention discloses a thermal management energy-saving control system for a battery of a pure electric vehicle, wherein the system comprises a thermal management system, a cold car starting working condition strategy module, a driving working condition strategy module and a stable working condition strategy module; the cold car starting working condition strategy module, the driving working condition strategy module and the stable working condition strategy module are used for formulating heat management control strategies under different working conditions, and the heat management system is used for executing the heat management control strategies under the different working conditions; and the heat management system comprises a control unit system, a passenger compartment air conditioning system, a battery heat management heating system and a battery heat exchanger water chilling unit assembly. The thermal management system adopts different control strategies according to different use conditions of the whole vehicle, so that the basic discharge activity of a battery cell of the battery can be ensured, the working efficiency of the battery is improved, the heating rate is increased, and excessive energy consumption of a PTC heater and heat loss of an external system caused by repeated temperature adjustment can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of battery heat management and control for pure electric vehicles, in particular to a battery heat management and energy-saving control system for pure electric vehicles. Background technique [0002] The power battery life and mileage of pure battery vehicles are closely related to the temperature of the battery core. The optimal charging and discharging temperature of the battery core is around 15°C. In order to ensure that the battery works in a constant temperature area, the battery liquid cooling technology has become increasingly mature; All batteries need to be heated. The energy utilization rate during the heating process is related to the battery life attenuation of the whole vehicle. The optimal battery thermal management strategy is crucial to the power consumption of the battery during winter heating; [0003] At present, the battery heating scheme adopted by liquid-cooled batteries in the indust...

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Problems solved by technology

[0003] At present, the battery heating scheme adopted by liquid-cooled batteries in the industry is to heat the PTC through water, and heat the coolant in the water-cooled plate inside the battery to exchange heat with the battery cells to achieve the purpose of battery heating; the adopted schemes include: 1. Air conditioning heater Two independent PTCs are used for the heating of the battery and the air conditioner in the passenger cabin and independent heating according to the respective needs of the battery. This solution uses two independent PTCs, which is expensive to use and poor in economy; Heating the PTC; this solution also has the problem of high cost; therefore, the present invention proposes a battery thermal management and energy-saving control system for pure electric vehicles to solve the deficiencies in the prior art

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