Electric vehicle power battery box liquid leakage detection system and detection method thereof

Abstract

The invention relates to an electric vehicle power battery box liquid leakage detection system and a detection method thereof. The liquid leakage detection system comprises a plurality of liquid leakage detection devices, a signal processing unit, and an alarm unit, which are arranged in a power battery box. The output terminals of the liquid leakage detection devices are connected to the input terminal of the signal processing unit, and the output terminal of the signal processing unit is connected to the control terminal of the alarm unit. According to the detection method, the liquid leakage detection devices can detect whether liquid leakage happens in the battery box in real time, once the liquid leakage is detected, the signal processing unit can trigger the alarm unit to give off an alarm, moreover, the liquid leakage alarm can also be graded, thus a driver or related personnel can clearly know the leakage degree and carry out a corresponding treatment more pertinently. The using is more flexible, the intelligent degree is high, and the traveling safety is improved.

Description

technical field [0001] The invention relates to the field of electric vehicle manufacturing, in particular to a liquid leakage detection system and a detection method for a power battery box of an electric vehicle. Background technique [0002] With the development of new energy, a large number of lithium-ion batteries are used in electric vehicles. In order to make charging and battery replacement faster and more convenient, the power batteries on electric vehicles generally exist in the form of battery boxes, that is, to install multiple lithium-ion batteries. Into the box to form a modular power battery. At present, the power battery pack is mainly assembled with a soft-packed polymer lithium-ion battery. The three sides of the aluminum-plastic film casing that constitutes the single battery are sealed by heat and pressure, and there is a risk of leakage from the plastic-sealed side. Moreover, electric vehicles will inevitably vibrate during driving. The friction and ext...

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Problems solved by technology

[0003] The present invention mainly solves the problem that the vibration that occurs during the driving of the electric vehicle may easily cause mutual friction and extrusion between the single battery and the module casing, which may easily cause damage to the aluminum-plastic film casing of the single battery and cause electrolyte leakage, and the loss of the electrolyte will cause Attenuate the battery failure capacity, thereby affecting the performance of the entire power battery pack. At the same time, the leaked electrolyte will also corrode the battery box and the circuit system, and there is a technical problem of great potential safety hazards; provide a leakage of the power battery box of an electric vehicle The detection system and its detection method can detect in real time whether there is leakage of the battery during the use of the power battery pack, and once the leakage is detected, an alarm signal will be sent to remind relevant personnel to take corresponding measures in time to improve driving safety

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