Device for measuring thickness of electric cell of power battery

Abstract

The invention relates to the technical field of power battery testing, in particular to a device for measuring the thickness of an electric cell of a power battery. The device comprises a sealed housing. An insulated pressing plate is fixed at the lower part of the inner side of the housing; an upper pressing plate that can move up and down is arranged above the insulated pressing plate; and the upper part of the upper pressing plate is connected with a lifting mechanism. And a digital display dial gauge extending out of the housing is connected to the upper part of the upper pressing plate. On the basis of the structure, because the flexible pneumatic control is used for replacing measurement by a manual vernier caliper or a thickness gauge, a phenomenon of wrong data judgment caused by changing of the measurement staff or objective dimension measurement estimation is reduced. During the measurement, with the high-precision dial indicator and pressure sensor, the thickness after cold pressing of the battery as well as the accurate read number of pressure application is measured accurately.

Description

technical field [0001] The invention relates to the technical field of power battery detection, in particular to a device for measuring the cell thickness of a power battery. Background technique [0002] When power battery manufacturers produce square aluminum shell and plastic shell power batteries, the production of battery cells is the core of the entire technical process route. The batteries produced by power battery manufacturers generally have two technical manufacturing processes: lamination and winding. Due to the low efficiency of the stacking process and the explosive growth of lithium batteries in recent years, more and more manufacturers have turned to the winding process. The principle of the winding process in the production of batteries is that the positive pole piece, the negative pole piece and the ceramic diaphragm are wound through the winding equipment in a certain order. Since the positive and negative electrode sheets themselves have a certain degree...

AI Technical Summary

Problems solved by technology

In the process of producing positive and negative electrodes, the coating film density is difficult to control, so the internal structure of the battery is often uneven, and the tabs, the end of the diaphragm, and the curling of the side of the battery are easy to cause ultra-thickness.

In the end, when the battery core is inserted into the shell, it is difficult to enter the shell due to the excessive thickness of the battery core, or the overall thickness of the battery is excessive after being forced into the shell, and subsequent sealing welding, chemical formation and other processes cannot be performed.

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