Battery thermal management strategy of plug-in hybrid vehicle type

Abstract

A battery thermal management strategy of a plug-in hybrid vehicle type comprises the steps of establishing an interaction strategy of a refrigerant loop state machine and a battery loop state machine,and switching between different state machines to achieve the purpose of switching between a cooling mode and a cooling capacity; judging the gear of a fixed pump according to the battery loop statemachine, and establishing a pump request strategy of a battery loop; controlling according to the battery loop state machine, a battery water pump request, a battery inlet water temperature, a batteryinlet water temperature target value, an environment temperature, an engine rotating speed, a compressor request and the like, and establishing a fan request strategy of the cooling loop; and establishing a valve request strategy of the battery loop and the refrigerant loop. The energy consumption of the battery loop is reduced, the operation of the fan and the pump can be actively controlled, and the working efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a battery thermal management strategy for a plug-in hybrid vehicle. Background technique [0002] Traditional fuel vehicles do not have a battery system, so there is no strategy for battery thermal management. As for plug-in hybrid vehicles with battery systems, domestic research and development on the control methods of their battery cooling systems is still in its infancy in recent years. The thermal management control strategy of the battery circuit is that the thermal management controller controls the work of water pumps, fans, etc. according to the input of the IPU (Intelligence Processing Unit). The control strategy is single, and it can only passively accept instructions and cannot actively judge. Contents of the invention [0003] In view of this, the present invention provides a battery thermal management strategy for a plug-in hybrid vehicle. [0004] T...

AI Technical Summary

Problems solved by technology

[0002] Traditional fuel vehicles do not have a battery system, so there is no strategy for battery thermal management

As for plug-in hybrid vehicles with battery systems, domestic research and development on the control methods of their battery cooling systems is still in its infancy in recent years. The thermal management control strategy of the battery circuit is that the thermal management controller controls the work of water pumps and fans according to the input of the IPU (Intelligence Processing Unit). The control strategy is single, and it can only passively accept instructions and cannot actively judge. There is a certain amount of energy waste and excessive control.

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