Sealing detection device and method for battery pack and battery pack

Abstract

The invention discloses a sealing performance detection device and method used for a cell pack and the cell pack. The device comprises an air pressure acquisition module configured to acquire the current air pressure in the cell pack, and a control module configured to controlling an alarm device to gives out alarms when the current air pressure meets a preset alarm condition. In this way, a cell group can be prevented from being damaged by the water damage in the cell pack, or performance of the cell group is prevented from being affected by gathered dust in the cell pack; a worker can be efficiently and timely prompted of possible problems in the current sealing performance of the cell pack, so the worker is capable of conveniently taking solving measures as soon as possible; and effects of maintaining optimal performance of the cell pack and prolonging the service lifetime of the cell pack are finally achieved.

Description

technical field [0001] The present invention relates to the field of leak detection of battery packs, in particular to a leak detection device and method for battery packs and a battery pack. Background technique [0002] The sealing and waterproof performance of battery packs is an important safety requirement for power battery packs, and the battery packs in certain locations have strict protection level (IP level) requirements. For example, the battery pack arranged at the bottom has an airtightness rating of IP67. When the airtightness of these battery packs does not meet the requirements, it will cause dust, moisture or even water leakage in the battery pack. These situations will lead to damage to the battery system, and more serious may lead to safety accidents. At present, the commonly used method for detecting the airtightness of the battery pack is to judge whether the airtightness of the battery pack is leaked or not. However, there are certain defects in the a...

AI Technical Summary

Problems solved by technology

However, there are certain defects in the above detection method

For example, only when the battery pack is seriously flooded (a certain potential point in the battery pack is short-circuited by the water on the body), the leakage of the battery pack can only be detected, but often at this time, the battery system has been damaged

In addition, the leakage of the battery pack is not necessarily caused by poor sealing and water ingress, so when the leakage is detected, it cannot be directly judged that the cause of the fault is poor sealing, and the sealing of the battery pack cannot be accurately and effectively detected

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