New energy pure electric bus battery and motor combined thermal management system and method

Abstract

The invention relates to a new energy pure electric bus battery and motor combined thermal management system and method. The thermal management system comprises a radiating module, a heat generation module, a control module and a circulation module. The radiating module comprises a radiator and a radiating fan connected with the radiator. The heat generation module comprises a motor and a motor controller connected with the motor. The control module comprises a whole bus controller and a power lithium battery management system connected with the whole bus controller through a signal line. The circulation module comprises a first circulation water pump, a second circulation water pump, circulation pipelines, a first three-way valve, a second three-way valve, a first solenoid valve and a second solenoid valve. According to the thermal management system, a power lithium battery and the driving motor can be subjected to effective thermal management to enable the power lithium battery and the driving motor to work in the most suitable temperature range to give play to the optimal using performance, the whole bus mass and cost can further be reduced, heat produced in the operation processes of the driving motor and the motor controller is effectively used, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of pure electric buses, in particular to a battery-motor combined thermal management system and thermal management method for new energy pure electric passenger cars. Background technique [0002] With the country's strong support for new energy vehicles, my country's new energy vehicles have achieved rapid development. Both the production and sales of new energy vehicles and key components such as lithium batteries and motors have achieved rapid development. my country's new energy automobile industry has begun to take shape and has officially entered a period of development. However, due to the inherent properties of key components of new energy pure electric buses such as power lithium batteries and drive motors, such as the operating temperature range of lithium batteries is limited to a certain temperature range, the performance of lithium batteries can only be very good within this temperature range...

AI Technical Summary

Problems solved by technology

Although the predetermined cooling effect has been achieved in the actual practical process, the application of the two systems not only increases the cost of the vehicle, but also brings difficulties to the layout of the vehicle. Vehicle quality affects the mileage of a pure electric bus, and the mileage is a technical indicator that end users value very much. Therefore, under the condition that the total battery power and the matching of components such as motors are fixed, the quality of the vehicle can be reduced to ensure power. Both the lithium battery and the drive motor work in the most suitable temperature range, so that the optimal performance of the power battery and motor can be exerted, and the customer's use requirements can be satisfied to the greatest extent.

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