Thermal management system

Abstract

The invention provides a thermal management system and belongs to the field of electric vehicles and hybrid electric vehicles. The system comprises a plurality of cooling units corresponding to a plurality of battery modules respectively, a plurality of flow valves corresponding to the plurality of cooling units respectively, a temperature acquiring module and a controller, wherein each of the cooling units is configured to enable a cooling medium to circulate so as to cool the corresponding battery module, and the plurality of cooling units are used for receiving the cooling medium in a manner of parallel connection; the temperature acquiring module is used for acquiring the temperature of each of the battery modules; the controller is used for determining the opening of the flow valve of the corresponding cooling unit corresponding to each of the battery modules according to the temperature of the battery module and enabling each of the flow valves to open the corresponding opening. With the adoption of the scheme provided by the invention, as the flow rate of the cooling medium flowing through the corresponding cooling unit can be regulated through controlling the opening of the corresponding flow rate, the problem of larger temperature difference between the two adjacent battery modules is solved, so that the performance of power batteries are improved, and the service lives of the power batteries are prolonged.

Description

technical field [0001] The invention relates to a hybrid vehicle or an electric vehicle, in particular to a thermal management system for thermal management of a power battery in a hybrid vehicle or an electric vehicle. Background technique [0002] With the increasingly severe energy situation and the gradual strengthening of people's awareness of environmental protection, electric vehicles have received more and more attention from the whole society, which has led to the continuous development and improvement of electric vehicle batteries and power supply systems. At present, battery overheating and thermal runaway are still the main reasons affecting battery performance and life. Now mainstream automakers are developing and applying liquid cooling systems to power systems to improve battery performance and extend battery life. [0003] Liquid cooling systems generally have three layout forms on the power system: series, parallel, and series-parallel hybrid. The advantag...

AI Technical Summary

Problems solved by technology

However, in the prior art, the problem of large temperature difference between the battery at the liquid inlet and outlet of the system can be solved, but it cannot be solved for the large temperature difference of the battery at other positions such as unfixed positions.

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