Vehicular power battery pack detection system and detection method and vehicle

Abstract

The invention relates to the field of power battery systems, provides a vehicular power battery pack detection system and detection method and a vehicle and aims to detect whether power battery pack cooling media leak or not. The detection system comprises a medium absorption unit, a storage unit, a liquid level detection unit and a control unit. The medium absorption unit is used for absorbing aleaked cooling medium of a power battery pack and changes own resistance value after absorption of the cooling medium; the storage unit is used for storing the power battery pack cooling medium; the liquid level detection unit is used for measuring cooling medium capacity of the storage unit; the control unit is connected with the medium absorption unit and the liquid level detection unit and usedfor judging whether the cooling medium leaks from the power battery pack or not according to the own resistance value of the medium absorption unit and / or the capacity measured by the liquid level detection unit. The problem of cooling liquid leakage detection failure caused by failure in insulation resistance decline due to the fact that a small quantity of cooling liquid leaks or the leaked cooling liquid does not intrudes a direct-current circuit in the prior art is solved.

Description

technical field [0001] The invention relates to the field of power battery systems, in particular to a detection system for a vehicle power battery pack, a detection method thereof, and a vehicle. Background technique [0002] With the increasingly severe energy situation, people's awareness of environmental protection has gradually strengthened, and new energy vehicles have gradually entered people's daily life, so the related technologies of new energy vehicles are also being innovated all the time. Among them, improving the safety indicators of vehicles and developing new safety warning mechanisms have become the main directions of vehicle research and development today. The cooling of the power battery of a new energy vehicle has a great impact on the performance, life and safety of the battery, and the cooling system of the battery is relatively complicated. Once the coolant leaks in the battery pack, it is likely to cause dangers such as short circuit of the battery. ...

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a detection system for vehicle power battery packs to solve the problem that in the prior art, the insulation resistance value will not drop due to a small part of the coolant leakage or when the leaked coolant does not invade the DC circuit. , making it impossible to detect coolant leaks

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