Dynamic control method and system for flow rate of cooling liquid of power battery

Abstract

The invention relates to the field of electric vehicle battery management systems, in particular to a dynamic control method and system for the flow speed of power battery cooling liquid, and the system comprises a battery management system BMS, an environment temperature detector, an initial temperature determination module, an outer circulation module and a flow control valve module. The outer circulation module comprises a cooling liquid water pump and a cooling liquid flow speed adjusting controller, and according to the experimental simulation result, the power consumption of the cooling system can be reduced by 30% or above by means of the control scheme.

Description

technical field [0001] The invention relates to the field of electric vehicle battery management systems, in particular to a dynamic control method and system for a cooling fluid flow rate of a power battery. Background technique [0002] As more and more countries begin to pay attention to energy and environmental issues, the electric vehicle industry is developing rapidly, sales of electric vehicles are increasing year by year, and their overall performance is also improving, but there are still some shortcomings. question. [0003] In order to solve the damage to the working performance caused by the long-term high temperature of the power battery of the electric vehicle, the battery pack of the existing electric vehicle is designed with a cooling system, and the flow rate of the coolant in the cooling system will affect the heat dissipation effect of the battery pack. . If the coolant flow rate is too small, the overall temperature of the battery module will be too hig...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the damage to the working performance of the power battery of the electric vehicle at a high temperature for a long time, the battery pack of the existing electric vehicle is designed with a cooling system, and the flow rate of the coolant in the cooling system will affect the heat dissipation effect of the battery pack

If the coolant flow rate is too small, the overall temperature of the battery module will be too high, and if the flow rate is too high, the energy consumption of the coolant pump will be increased

The energy consumed by the coolant pump is provided by the battery. The greater the energy, the less energy the battery provides to drive the electric vehicle, which ultimately leads to a reduction in cruising range.

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