Rechargeable battery electrode testing device

Details Rechargeable battery electrode testing device Rechargeable battery electrode testing device

G - Physics

01

R

G01R 31/36 (2006.01) G01B 7/24 (2006.01) H01M 10/42 (2006.01) H01M 10/48 (2006.01) H01M 6/50 (2006.01)

Patent

CA 2329410

A testing device which measures minute changes in battery electrode thickness due to repeated charge/discharge cycles. The testing device uses a moving wall to detect changes in electrode dimensions, typically thickness. The moving wall is adjacent a surface of the electrode, and is connected a sensor that measures wall displacement induced by electrode dimensional changes. Also included in the testing device is a thermocouple that senses the temperature of the device, allowing the data sampling and processing means to correct for thermal expansion/contraction during operation. The testing device can be used during the battery cycling as it does not interfere with the charge/ discharge/recharge process. The testing device can be used to measure either a single electrode, or a plurality of electrodes assembled into an electrode stack and incorporated either into a test cell or into a working battery.

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