Balanced heat dissipation liquid cooling system for power battery based on thermal shrinkage material and control method thereof

Abstract

The invention discloses a balanced heat dissipation liquid cooling system for a power battery based on a thermal shrinkage material and a control method of the balanced heat dissipation liquid coolingsystem. The thermal shrinkage material is mounted on the surface of the liquid cooling plate runner; the turbulence degree of cooling liquid flowing is increased; the lower part is in contact with aheat conduction block prepared from a high-heat-conduction silicon material; the heating sheet transmits heat to the thermal shrinkage material through the heat conduction block; the invention discloses a liquid cooling system. The controller controls the circulating flow of the cooling liquid and the power output of the heating sheet in real time according to the temperature information of the battery module; the heating sheet generates high temperature during working; through the thermal conduction of the thermal conduction block, the thermal shrinkable material above the thermal conductionblock is heated to expand and deform; the rapid reduction of the maximum temperature and the maximum temperature difference between the modules and in a single module is realized; meanwhile, the controller can adjust the output power of each heating piece in real time according to the temperature information of the module, the temperature balance in the cooling process is achieved, the heat dissipation rapidity of the power battery is improved, the temperature rise and the temperature difference of the battery module are effectively controlled, the use performance of the battery is improved, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the heat management technology of a power battery for a new energy vehicle, in particular to a liquid cooling plate for balanced heat dissipation, a liquid cooling system composed of the same, and a liquid cooling control method. Background technique [0002] Facing the increasingly serious energy crisis and environmental pollution problems, energy-saving and environmentally friendly new energy vehicles have attracted more and more attention. Automakers from various countries have increased their investment in research and development of pure electric vehicles (EV) and hybrid electric vehicles (HEV). As early as 2011, my country promulgated the "Energy Saving and New Energy Vehicle Industry Development Plan (2011-2020)" at the national level, which enabled the rapid development of the new energy vehicle industry. At present, one of the key factors restricting the further popularization of new energy vehicles is the mileage pro...

AI Technical Summary

Problems solved by technology

The shortcomings of the above patents are: 1) the temperature difference between the battery modules cannot be effectively reduced in time; 2) the temperature rise and temperature difference between the single batteries in the module cannot be effectively reduced; 3) the heat dissipation process is relatively slow

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