Detection method for preventing printing mixing during SE battery production process

A technology of production process and detection method, applied in circuits, electrical components, semiconductor/solid-state device testing/measurement, etc., can solve problems such as mixing, loss, and difficulty in observation, so as to achieve zero mixing in production lines and avoid losses. , to avoid the effect of a large number of mixed films
CN110211890AActive Publication Date: 2019-09-06TONGWEI SOLAR (ANHUI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGWEI SOLAR (ANHUI) CO LTD
Publication Date
2019-09-06

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Abstract

The invention discloses a detection method for preventing printing mixing during the SE battery production process. The step of shooting detection is added between SE laser doping and back-surface laser groove formation and is used for whether a batter piece after SE laser doping is consistent with the specification of a battery piece before the back-surface laser groove formation. A shooting table is additionally arranged between SE laser doping and back-surface laser groove formation, placement and detection of different types of battery pieces are handled by a coordinate system which is built in advance, contrast by camera shooting and a coordinate system is more convenient to identify compared with naked-eye observation, so that whether the type of the battery piece right subjected toSE laser doping is consistent with the type of the battery piece before back-surface laser groove formation is or not is determined, the situation that a large amount of pieces are mixed during subsequent production is prevented, and loss is prevented.
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Description

technical field

[0001] The invention relates to the technical field of printing and slotting of SE batteries, in particular to a detection method for preventing printing mixed sheets in the production process of SE batteries. Background technique

[0002] With the continuous development of crystalline silicon technology, the expansion of solar cell production scale and the continuous reduction of cell prices, reducing production costs and improving efficiency are the focus of cell technology development. For existing conventional PERC cells, the front side has a higher junction depth and phosphorus concentration, and the high recombination of the reflector will lead to lower open voltage and short-circuit current, and the selective emitter (SE) electrode is because it receives Low-concentration doping in the illuminated area and high doping under the metal grid line form a lateral high-low junction structure to increase the potential difference between the P-N junctions, red...

Claims

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