Method for detecting through-wall welding spots of lead-acid storage battery

Abstract

The invention discloses a lead-acid storage battery through-wall welding spot detection method. The method comprises the following steps of detecting five welding spots of a battery by using a weldingspot detection machine, dissecting the welding spots of a rejected defective product, and after dissecting, carrying out precision calibration on the welding spot detection machine by using a calibration tool if the quality of the welding spots is intact, in the calibration process, the five detection clamps being used for detecting the voltages at the two ends of the same welding spot respectively, and the positions, loaded at the two ends of the welding spot, of the detection clamps being adjusted in the front-back direction and the left-right direction beyond the voltage deviation range. The method is advantaged in that detection accuracy of the through-wall welding spot detection machine is improved, detection deviation caused by position deviation of the detection clamp is avoided, and storage batteries with quality problems of through-wall welding spots are effectively removed.

Description

technical field [0001] The invention relates to a method for detecting through-wall welding spots of lead-acid storage batteries, which belongs to the technical field of storage batteries. Background technique [0002] Through-wall welding is mainly used for the series connection of lead-acid batteries. The welding quality of through-wall welding directly affects the quality of the battery. During the use of the battery, the solder joints are opened and the internal resistance of the battery increases, which causes the battery to be scrapped and seriously affects the service life of the battery. The quality of through-wall welding determines the reliability and life of the battery, so 100% accurate inspection of the quality of through-wall welding joints has become an extremely important process. [0003] At present, the inspection of through-wall welding welding quality of lead-acid batteries at home and abroad is mainly carried out through the through-wall welding spot in...

AI Technical Summary

Problems solved by technology

[0004] The through-wall solder joint inspection machine used in the lead-acid battery industry has high sensitivity and relatively good detection accuracy. However, during the long-term use of the through-wall solder joint inspection machine, the detection clamp is loaded on both sides The position of the terminal will be shifted, resulting in a large deviation in the voltage detection values ​​at the two ends of the five solder joints of the battery, resulting in the fact that the actual quality of the solder joints cannot be effectively judged due to the detection deviation of the detector

In addition, it is very difficult for technicians to set the range of process parameters for qualified solder joint inspection. The narrow range of process parameters can effectively ensure the quality of solder joints, but it is easy to reject qualified products and cause losses; the range of process parameters is set wide. In the case of defects in the through-wall solder joints, although the voltage values ​​at both ends of the five solder joints of the same battery detected by the existing detector are quite different, the detected voltage values ​​are all within the detection voltage deviation range (Generally, the detection voltage is required to be less than 5mV). At this time, the problematic product will still be classified as a qualified product, which will cause problems in the subsequent battery and affect the service life of the battery.

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