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Apparatus and method for measuring thickness of unit cell

A unit cell and measuring unit technology, which is applied to measuring devices, battery pack components, secondary battery testing, etc., can solve problems such as difficulty in applying measurement methods and only selection of inspection methods, achieve highly accurate thickness and reduce failures rate, the effect of highly accurate measurement

Pending Publication Date: 2022-02-25
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to select only defective products by this sample inspection method
In addition, since the lamination process has a high production speed, it is difficult to apply the measurement method according to the related art that measures the thickness by physical contact

Method used

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  • Apparatus and method for measuring thickness of unit cell
  • Apparatus and method for measuring thickness of unit cell
  • Apparatus and method for measuring thickness of unit cell

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no. 1 approach

[0039] In the present invention, as a first embodiment, a method for measuring the thickness of the unit cell 10 is provided. Such as figure 1 , which shows the sequence of the method for measuring the thickness according to the first embodiment of the present invention, the measuring method of the present invention is characterized in that the thickness from the fixed position to the unit cell 10 is measured during the transfer of the unit cell 10 The thickness of the unit cell 10 is measured by changing the distance.

[0040] refer to figure 2 , which schematically shows the thickness measuring device of the present invention, describes the thickness measurement of the unit cell 10 of the present invention. When the unit cells 10 are transported by the transport rollers 20 arranged side by side at a predetermined distance from each other, light is irradiated from the upper side and the lower side of each unit cell 10 to the upper and lower surfaces of the unit cells 10, a...

no. 2 approach

[0055] Furthermore, in the present invention, as a second embodiment, there is provided a thickness measuring device for the unit cell 10 that can measure the thickness of the unit cell 10 by the measuring method according to the first embodiment.

[0056] In this embodiment, the thickness measuring device includes: a plurality of conveying rollers 20 which sequentially convey the unit cells 10 and are spaced apart from each other by a predetermined distance; The moving path of 10 irradiates light and counts the time when reflected light is received, thereby measuring the thickness of each unit cell 10 .

[0057] The thickness sensor includes an upper thickness sensor 40 disposed above the conveying rollers 20 to irradiate light onto the top surfaces of the unit cells 10 passing between the conveying rollers 20, and count the time when the reflected light is received, thereby measuring the distance from the unit cell 10; and a lower thickness sensor 50 disposed below the conve...

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Abstract

An apparatus for measuring the thickness of a unit cell according to the present invention is characterized by comprising: a plurality of transfer rollers which sequentially transfer unit cells and are arranged to be spaced apart from each other; and a thickness sensor at a fixed location which irradiates light in the path in which the unit cells move and calculates a time of the received light so as to measure a thickness of the unit cells. A method for measuring the thickness of a unit cell according to the present invention is characterized by comprising: a unit cell transfer step (S1) of transferring unit cells through a plurality of transfer rollers arranged to be spaced apart from each other; a distance measuring step (S2) of irradiating light on the upper surface of the unit cells through an upper thickness sensor, irradiating light on the lower surface of the unit cells through a lower thickness sensor, and calculating a light receiving time of the light so as to measure the distance between the upper thickness sensor and the upper surface of the unit cells and the distance between the lower thickness sensor and the lower surface of the unit cells, respectively; and a thickness calculation step (S3) of subtracting a distance measurement value between the upper thickness sensor and the upper surface of the unit cells and a distance measurement value between the lower thickness sensor and the lower surface of the unit cells, from a distance between the upper thickness sensor and the lower thickness sensor, so as to calculate a thickness of the unit cells.

Description

technical field [0001] This application claims the benefit of priority from Korean Patent Application No. 10-2019-0105416 filed on August 27, 2019, which is hereby incorporated by reference in its entirety. [0002] The present invention relates to an apparatus and method for measuring the thickness of a unit cell, and more particularly, to an apparatus and method for measuring the thickness of a unit cell that emits light to measure the thickness in real time during transfer of the unit cell. Background technique [0003] In the fields of mobile devices, electric vehicles, etc., the demand for high-efficiency secondary batteries is rapidly increasing. However, among secondary batteries, a lithium secondary battery having high energy density and low self-discharge characteristics and capable of maintaining a relatively high voltage has been commercialized and widely used, and research for improving the lithium secondary battery has been actively carried out. Performance res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/06
CPCG01B11/0691H01M10/42Y02E60/10G01B11/0608H01M50/105G01B11/06H01M10/4285G01B11/026
Inventor 崔珉準金显泰
Owner LG ENERGY SOLUTION LTD
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