Electric connection contact reliability detecting method

Abstract

The invention provides an electric connection contact reliability detecting method. A plurality of battery cells are connected in series or parallel to form a battery pack, the electric connection contact reliability detecting method applied to the battery pack comprises the steps of: connecting an AC internal resistance tester to an electrically-connected node to be detected by adopting a wiring manner of a four-terminal testing method; setting measurement gears, a voltage measuring range and a resistance measuring range; acquiring measurement data; transmitting the acquired measurement data to an upper computer for processing; and judging whether a measured resistance value is within an acceptability limit by means of the upper computer, and indicating that a problem exists in the electric connection reliability if the measured resistance value exceeds the acceptability limit. The electric connection contact reliability detecting method adopts the AC internal resistance tester for measuring electric connection contact internal resistance, realizes fast detection of electrical connection parts of products, ensures the reliability and consistency of product quality, and quantifies the reliability of connection by means of numerical values.

Description

technical field [0001] The invention belongs to the field of power battery quality detection, and in particular relates to a method for detecting reliability of electrical connection contacts. Background technique [0002] A power battery is usually made up of several battery cells connected in series, and the battery is made up of several cells connected in parallel. The series-parallel connection of batteries in production is fastened and connected through copper bars using screws, which not only requires the screws to be tightened, but also needs to ensure the consistency of tightening. There are problems such as foreign objects between the screws. If you only tighten them and rely on visual inspection to check whether the contact is good, many abnormalities cannot be found, which will eventually lead to product defects. How to detect the reliability of the connection quality without damage becomes very important, and at the same time, it is necessary to ensure the detec...

AI Technical Summary

Problems solved by technology

The series-parallel connection of batteries in production is fastened and connected through copper bars using screws, which not only requires the screws to be tightened, but also needs to ensure the consistency of tightening. There are problems such as foreign objects between the screws. If you only tighten them and then rely on visual inspection to check whether the contact is good, many abnormalities cannot be found, which will eventually lead to product defects.

Images