Battery pack sealing detection system and electric vehicle

Abstract

The invention belongs to the field of power batteries, and discloses a battery pack sealing detection system and an electric vehicle. The battery pack sealing detection system comprises a gas flow generation device, a gas flow sensor, an alarm device and a controller. The gas flow generation device is connected to a sealing detection interface of the battery pack through a sealing detection pipe and is suitable for generating a gas flow according to preset air pressure; the gas flow sensor is arranged in the sealing detection interface, and the signal output end of the gas flow sensor is electrically connected to one input port of the controller; a signal input end of the alarm device is electrically connected to one output port of the controller; and a mapping table of preset air pressureand the gas flow is pre-stored in the controller, the controller is suitable for comparing a detection value Q1 of the gas flow sensor with a gas flow pre-stored value Q0 in the mapping table, if theQ1 is greater than the Q0, an alarm signal is output to the alarm device, and meanwhile the alarm device starts alarming according to the alarm signal. According to the invention, the sealing performance of the battery pack can be detected in real time, and the use safety of the battery pack is improved.

Description

technical field [0001] The invention belongs to the field of power batteries, and in particular relates to a battery pack sealing performance detection system and an electric vehicle. Background technique [0002] At present, traditional fuel vehicles are gradually being replaced by new energy vehicles. Many traditional fuel vehicle platforms directly replace the engine structure with a power battery pack structure, replacing the vehicle's power source from fuel to batteries. The light weight of the battery pack is related to the energy density of the battery pack, which in turn is related to the improvement space of the mileage of the vehicle. [0003] In order to reduce the weight of the battery pack, while reducing the weight of the battery pack, the wall thickness of the case is also correspondingly thinned. For most power battery packs located under the floor of the vehicle, since there are often large foreign objects such as speed bumps and stones on the road, it is i...

AI Technical Summary

Problems solved by technology

The bottom impact of foreign matter on the road surface is very harmful to the battery pack, which will cause deformation or even rupture of the bottom shell of the battery pack, damage to the sealing strip, damage to the explosion-proof valve, and loosening of the fixing bolts of the shell, etc., resulting in failure of the seal of the whole pack

However, the failure of the seal m

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