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Date: 29-11-14

Lithium-ion battery can be tested within in a minute

The newly launched Hioki BT4560 Battery Impedance Meter allows measurement of lithium ion battery within one minute.

Generally testing of lithium-ion battery takes longer due to charging and discharging process, whereas BT4560 offers a new measurement approach that delivers roughly the same ability to evaluate battery performance and quality as the conventional approach but with measurement times of approximately 10 seconds.

These days lithium batteries are heavily used not only in smart phones and mobile phones but also in electric and hybrid vehicles, who's market is expanding year by year. Testing is an important stage for batteries before they go into the application system.

A method known as DC-IR measurement has been used to measure the internal resistance of lithium-ion batteries as a way to evaluate their performance and quality. In this method, the internal resistance is measured after charging the battery and then discharging it by allowing a large current to flow from the battery so as to produce a voltage drop. Since the initial charging process takes from several minutes to several tens of minutes, the entire internal resistance measurement process required by the conventional approach takes up to an hour, explains Hioki.

Hioki solved the long testing time of batteries by using low-frequency AC-IR measurement, which enables performance and quality to be evaluated in roughly the same manner as the conventional DC-IR measurement method. Specifically, the battery's internal impedance is measured at a low frequency of 1 Hz or less, eliminating the need for a time-consuming charging process. Consequently, the BT4560 can complete AC-IR measurement in about 10 seconds, versus several tens of minutes to about one hour for the conventional approach claims Hioki.

To know more visit: Hioki.com

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