Automobile battery box lower cover weld joint gas leakage position detection device and method

Abstract

The invention belongs to the technical field of machinery and provides an automobile battery box lower cover weld joint gas leakage position detection device and method. A sealed cavity formed betweenan inflation mechanism and a sealing cover plate is inflated with gas through a gas inlet of the inflation mechanism; a leak detector is manually used for detecting a weld joint after a period of time; and when the leak detector gives an alarm, it shows that gas leakage occurs at a corresponding position, and the position is a weld joint gas leakage position. With the automobile battery box lowercover weld joint gas leakage position detection device and method of the invention adopted, the problem of finding the gas leakage position of the lower cover of a multi-position arc welding batterybox is solved, workers can repair welding for sealing conveniently, the rejection rate is reduced, operation is easy, detection is rapid, judgment is accurate, the cost rate is increased, and therefore, economic benefits are increased.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to a device and method for detecting the air leakage position of the welding seam of the lower cover of an automobile battery box. Background technique [0002] Electric vehicle (BEV) refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and meets the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional vehicles, its prospects are widely optimistic; among electric vehicles Batteries are an essential part. At present, lithium-ion batteries are more and more widely used in the automotive industry due to their advantages of small size, light weight, environmental protection and reusability. However, the production process of car battery boxes requires strict To ensure that the internal airtightness meets the design requirements, the airtightness test of the overall weld is ...

AI Technical Summary

Problems solved by technology

[0002] Electric vehicle (BEV) refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and meets the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional vehicles, its prospects are widely optimistic; among electric vehicles Batteries are an essential part. At present, lithium-ion batteries are more and more widely used in the automotive industry due to their advantages of small size, light weight, environmental protection and reusability. However, the production process of car battery boxes requires strict To ensure that the internal airtightness meets the design requirements, the airtightness test of the overall weld is generally carried out. When the overall airtightness is found to be unable to meet the requirements, the workpiece is scrapped, and the loss cost is high; therefore, the lower cover of the battery box and the battery box are required The upper cover meets the airtightness requirements respectively. In the prior art, the lower cover of the battery box is spliced ​​by several aluminum profiles and aluminum plate arc welding. Due to the uneven distribution of joints, it is difficult to make a separate closed space for air tightness testing; for the lower cover of the car battery box formed by arc welding of aluminum profiles, due to the complexity of the mechanism, there has been no good method for detecting the position of the weld seam leak. It is necessary to provide a new technical solution to provide a basis for workers to repair welding and reduce product scrap rate, so as to solve the above technical problems

Images