System and method for vehicle-used battery thermal management

Abstract

The invention discloses a system and method for vehicle-used battery thermal management. The system adopts the structure that the output end of a water tank is connected in series with a liquid circulating pump through a pipeline; a refrigerator is fixedly arranged at the upper part inside the water tank; a flat aluminum tube is wound among single batteries; one end of the flat aluminum tube is connected with the liquid circulating pump, and the other end of the flat aluminum tube is connected with the input end of the water tank; a silica gel heating sheet is embedded between the flat aluminum tube and the biggest surface of each single battery; a temperature sensor is arranged on a vehicle-used battery; a fan is arranged outside a battery box and faces an air inlet; a battery control unit is connected with the temperature sensor through a control wire, connected with the fan through a control switch S1, connected with the liquid circulating pump through a control switch S2, connected with the refrigerator through a control switch S3, and connected with the silica gel heating sheet through a control switch S4. The system for vehicle-used battery thermal management has the advantages that two cooling systems are adopted; when the two cooling systems work simultaneously under a high-temperature condition, the effect of heat dissipation can be improved, and the period of heat dissipation can be shortened; if one cooling system breaks down, the other cooling system can still work.

Description

technical field [0001] The invention relates to power batteries of hybrid electric vehicles and electric vehicles, in particular to the field of heat control of power batteries, and is a vehicle battery management system. Background technique [0002] Hybrid vehicles and electric vehicles have become the transportation tools that will be developed in the future because of their advantages of greatly reducing or eliminating exhaust emissions and reducing energy consumption. The power battery is the energy carrier driven by hybrid electric vehicles and electric vehicles, and its performance greatly affects the performance of the whole vehicle. Power batteries are usually composed of a large number of single cells connected in parallel and in series. The current power battery cells cannot work normally in extreme low temperature (less than -30°C) and extreme high temperature (greater than 50°C) environments, resulting in the following Vehicles with power batteries as energy so...

AI Technical Summary

Problems solved by technology

Existing battery thermal management systems all use a separate cooling method to dissipate heat from the battery. The disadvantages are: when the temperature is not very high, using liquid cooling alone will waste a large part of energy; when the temperature is high , a single cooling method cannot quickly dissipate heat

When the cooling system fails, the battery cannot be dissipated, thus affecting the performance of the power battery

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