Cylindrical battery steel ball deviation detection method and system
A cylindrical battery and detection method technology, which is applied in the field of lithium-ion batteries, can solve problems such as liquid leakage and deflection of steel balls, and achieve the effects of reducing misjudgment and solving liquid leakage
Active Publication Date: 2022-01-28
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to solve the liquid leakage problem caused by the deflection of the steel ball when the cylindrical battery is sealed with the steel ball
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[0043] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention will be further described in conjunction with the accompanying drawings.
[0044] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.
[0045] refer to figure 1 and figure 2 , this embodiment discloses a method for detecting deflection of a steel ball in a cylindrical battery,
[0046] S1. Use a 2D camera to take pictures of the upper end of the cylindrical battery to obtain a picture P1 of the cylindrical battery;
[0047...
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The invention discloses a cylindrical battery steel ball deviation detection method and system, a 2D camera is used for photographing, a cylindrical battery picture is obtained, the state of a steel ball is identified through an algorithm, and whether steel ball missing and steel ball deviation exist or not is mainly detected. According to the method, misjudgment is reduced mainly by optimizing a detection algorithm and detection logic, and the detection process mainly comprises the steps of firstly detecting whether a battery exists or not, then detecting whether a two-dimensional code exists or not, further identifying a layer groove circle near the steel ball hole, searching the steel ball in a circle processing mode, finally searching an outer ellipse in a fitting mode, and calculating the distance between the long axis and the short axis, and calculating a deviation value of steel ball deviation, and judging whether the steel ball is deviated or not. By optimizing the process and the algorithm, whether the steel balls are deviated or not can be effectively detected, and misjudgment is reduced.
Description
technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method and system for detecting deflection of steel balls in cylindrical batteries. Background technique [0002] At present, the lithium-ion battery production process, the steel ball sealing process of the cylindrical battery cell, and the battery production scrap rate are extremely high, resulting in high production costs. This is mainly due to the liquid leakage problem caused by the misalignment of the steel ball when sealing the steel ball. The existing equipment detects whether the steel ball is misaligned using manual inspection or visual inspection. Manual inspection has great risks and there are missed inspections; In some visual inspection systems, there are disadvantages in the inspection process, and there are often missed inspections, which cause bad batteries that have deflected steel balls to flow into the subsequent process, causing battery pack l...
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IPC IPC(8): G01B11/00G01B11/02H01M10/058
CPCG01B11/00G01B11/022H01M10/058Y02E60/10Y02P70/50
Inventor 黄立军
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY