Battery pack liquid leakage detection device and battery pack liquid leakage detection method

Abstract

The invention belongs to the technical field of power batteries, and discloses a battery pack liquid leakage detection device and a battery pack liquid leakage detection method. The battery pack liquid leakage detection device comprises: a detection circuit; a first liquid leakage detection belt and a middle liquid leakage detection belt which are arranged between two adjacent battery modules and are respectively arranged on two sides of the first liquid cooling plate, wherein the first liquid leakage detection belt is selectively and electrically connected to the detection circuit and is used for detecting liquid leakage of the top surface of the first liquid cooling plate, and the middle liquid leakage detection belt is selectively and electrically connected to the detection circuit and is used for detecting liquid leakage of the bottom surface of the first liquid cooling plate; and a second liquid leakage detection belt which is arranged between the second liquid cooling plate and the battery module located at the bottommost layer, and the second liquid leakage detection belt is selectively and electrically connected to the detection circuit and is used for detecting liquid leakage of the top surface of the second liquid cooling plate. The battery pack liquid leakage detection device can quickly position the general position of liquid leakage, and is good in reliability.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a battery pack leakage detection device and a battery pack leakage detection method. Background technique [0002] One of the important components of electric vehicles is the power battery, and the battery pack of the power battery is a unit that obtains electric energy from the outside and can output electric energy to the outside. The battery pack may generate a lot of heat during long-term operation. In order to ensure that the battery pack can dissipate heat in time, the existing cooling methods for the battery pack include natural heat dissipation, forced air cooling and liquid cooling. With the promotion of new energy vehicles to high-temperature and alpine regions, especially the demand for fast charging and hybrid power, the battery packs of new energy vehicles currently use liquid cooling methods, but in the various working conditions of new energy vehicles, ther...

AI Technical Summary

Problems solved by technology

[0004] First, judge whether there is liquid leakage through insulation detection or setting a liquid level sensor. In order to detect liquid leakage in time, it is necessary to increase the number of liquid level sensors to cover all the leaking points as much as possible, and the number of sensors and other parts is large , the structure is more complicated and the cost is higher

[0005] Second, for battery module or single-layer battery pack leakage detection, it is not suitable for multi-layer battery packs, can not play the function of leakage protection of multi-layer battery packs, and cannot detect the leakage location of multi-layer battery packs in time Detection and prediction, poor sensitivity, low reliability

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