Battery heating assembly detection method

Abstract

The invention discloses a battery heating assembly detection method. The battery heating assembly detection method comprises the steps of circuit connection and signal detection executed in sequence;PTC connectors in each battery module are connected in series in sequence to be connected between the signal output end and the signal recovery end of a battery management system, so that a working staff can perform comparison between a detection signal emitted from the signal output end and a final signal received from the signal recovery end, and can directly judge that whether there is a PTC connector, which is not connected or in an abnormal operation, of the battery module or not through the comparison result, thereby quickly and accurately detecting the connecting state of the battery heating assembly.

Description

technical field [0001] The invention relates to the technical field of supporting battery components, in particular to a detection method for a battery heating component. Background technique [0002] At present, as the world's oil resources are increasingly scarce, major international and domestic automakers are devoting themselves to the development of new energy vehicles to advocate energy conservation and emission reduction; The mainstream choice of major car companies. [0003] As one of the core components of new energy vehicles, power batteries have greatly reduced discharge performance and charging capacity at low temperatures, which will affect the power performance and driving range of electric vehicles in severe cold regions, and even cause the vehicles to fail to charge. In order to better play the charge and discharge performance of the battery, most battery systems have added a heating function, and the current mainstream heating methods include heating film, ...

AI Technical Summary

Problems solved by technology

[0004] 1. During off-line detection, the battery management system controls the closed heating device to heat the battery, and observes the temperature rise of each module after a period of time. This detection method takes a long time, usually more than 15 minutes, which seriously restricts the battery. The overall production and processing efficiency of components is greatly affected by the ambient temperature, and the test results are not accurate and reliable;

[0005] 2. During off-line detection, the closed heating state is controlled by the battery management system, and the current of the heating circuit is detected. This detection method takes a short time, but because the PTC is connected in parallel in the entire circuit, even if a certain PTC is not connected, it will still fail due to The overall circuit can be turned on normally but the unconnected PTC cannot be detected, and the detection result is unreliable, which will cause hidden dangers to the normal use of subsequent battery components

Images