KR-20260067818-A - A Classification method of battery cell

KR20260067818AKR 20260067818 AKR20260067818 AKR 20260067818AKR-20260067818-A

Abstract

The present invention relates to a method for classifying battery cells, comprising the steps of: photographing a pouch-type secondary battery including a pouch and a data matrix printed on a certain area of the pouch through a camera module; obtaining "cell exterior image data," which is dimensional information obtained through data obtained by photographing the exterior image of the pouch-type secondary battery; obtaining "data matrix data," which is dimensional information obtained by photographing the data matrix; and comparing the "cell exterior image data" with the "data matrix data," and classifying the pouch-type secondary battery as a corresponding battery cell if the comparison values are identical or within an error range. The invention provides a method for classifying battery cells that can accurately classify target objects of various types according to their respective types and automate the classification process.

Inventors

박병희
권도윤
이나라

Assignees

(재)대구기계부품연구원

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (4)

A step of photographing a pouch-type secondary battery comprising a pouch and a data matrix printed on a certain area of the pouch through a camera module; A step of securing "cell exterior image data," which is dimensional information obtained through data obtained by capturing an exterior image of the above pouch-type secondary battery; A step of obtaining "data matrix data," which is dimensional information obtained by photographing the above data matrix; and A method for classifying battery cells comprising the step of comparing the above "cell appearance image data" and the above "data matrix data," and classifying the pouch-type secondary battery as the corresponding battery cell if the comparison value is the same value or within the error range value.
In Article 1, A method for classifying battery cells characterized in that the above error range value is ± 5% of the above same value.
In Article 2, It includes a battery cell classification device for classifying the above battery cells, and A battery cell classification device comprising: a mounting portion on which the pouch-type secondary battery is mounted; a first camera module positioned on the upper part of the mounting portion for photographing the upper surface of the pouch-type secondary battery; a second camera module positioned on the side of the mounting portion for photographing the side of the pouch-type secondary battery; and an up-and-down inversion module for up-and-down inversion of the pouch-type secondary battery.
In Paragraph 3, The above "cell exterior image data" is dimensional information obtained through data obtained by capturing an exterior image of the pouch-type secondary battery through a battery cell classification device, and A method for classifying battery cells, characterized in that the above "data matrix data" is dimensional information obtained by photographing the data matrix through the battery cell classification device.

Description

A Classification method of battery cell The present invention relates to a method for classifying battery cells, and more specifically, to a method for classifying battery cells that can accurately classify various types of battery cells according to each type. Recently, the method of using pouches as outer materials to seal electrode assemblies in rechargeable batteries is gaining popularity. Using pouches offers many advantages, including higher energy density per unit weight and volume, the ability to make batteries thinner and lighter, and reduced material costs for the outer casing. At this time, the pouch-type secondary battery must contain electrodes and electrolytes to have a larger capacity within a relatively small pouch in order to form a battery with a higher capacity; to this end, it is desirable to gradually reduce the peripheral sealing portion of the pouch that is not directly related to battery capacity or capacity. This is because reducing the width of the sealing portion of a pouch-type secondary battery allows for the accommodation of a larger capacity electrode assembly inside, while reducing the size of the sealing portion itself, which is not directly related to capacity. FIG. 1 is a schematic perspective view illustrating a typical pouch-type interest cell, FIG. 2 is a schematic side view illustrating a typical pouch-type interest cell, and FIG. 3 is a schematic top view illustrating a typical pouch-type interest cell. Referring to FIGS. 1 to 3, a general pouch-type battery (1) comprises a pouch (10) having a space for accommodating an electrode assembly (not shown), and the pouch (10) comprises an upper pouch (11); and a lower pouch (12) that is sealed with the upper pouch (11). At this time, at least one of the upper pouch and the lower pouch includes a space for accommodating the electrode assembly, for example, the upper pouch includes the space, and the electrode assembly is accommodated in the space, and with the electrode assembly accommodated in the space, the lower pouch is sealed with the upper pouch, so that the space of the upper pouch can be sealed. In addition, alternatively, the lower pouch includes the space, and the electrode assembly is accommodated in the space, and with the electrode assembly accommodated in the space, the upper pouch is sealed with the lower pouch, so that the space of the lower pouch can be sealed. In addition, alternatively, the upper pouch includes a first space and the lower pouch includes a second space, and the electrode assembly is accommodated in the first space and the second space, and with the electrode assembly accommodated in the first space and the second space, the lower pouch is sealed with the upper pouch so that the first space of the upper pouch and the second space of the lower pouch can be sealed. Accordingly, the shape and structure of the pouch in the present invention are not limited, however, the pouch in a general pouch-type secondary battery includes an electrode assembly placement portion (A) and a sealing portion (B) located in the outer region of the electrode assembly placement portion (B). At this time, as described above, if the width of the sealing portion of the pouch-type secondary battery is reduced, an electrode assembly with a larger capacity can be accommodated inside, and the sealing portion itself, which is not directly related to capacity, can be reduced, and consequently, the capacity of the secondary battery of the pouch can be determined by the dimensions of the electrode assembly placement portion (A). Meanwhile, the aforementioned pouch-type secondary battery can be classified into multiple product types based on capacity. When manufacturing the pouch-type secondary battery, if separate production lines and equipment are installed for each type, the manufactured pouch-type secondary battery will correspond to a single type. However, this entails space constraints due to the need to install equipment for each production line, and results in the problem of production being unevenly distributed among specific types. To address these issues, establishing a production line capable of mixed-model production of various products not only resolves the problem of limited installation space but also enables proactive response to the manufacturing of secondary batteries for each product type based on order volume by selectively manufacturing product groups with high order volumes. However, in the case of a production line capable of mixed-model production of multiple product types, for example, since the manufactured pouch-type secondary batteries come in various varieties, an additional sorting process is required to classify the aforementioned pouch-type secondary batteries by type. At this time, while the process of classifying various types of pouch-type secondary batteries by type can be considered to be carried out manually by a worker, if the sizes of each type do not differ significantly, not only is it