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Typical discharging curve for Ni based batteries, obtained from 2 NiCd cells of 700 mAH capacity. The sampling interval was 2 mins.  

Typical discharging curve for Ni based batteries, obtained from 2 NiCd cells of 700 mAH capacity. The sampling interval was 2 mins.  

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Article
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This paper introduces a theory for the development of a fully automated multiple chemistry battery charger. This can be possible through the detection of battery chemistry. The paper presents an algorithm to differentiate between Ni based, Li-ion and Sealed Lead Acid (SLA) batteries through the analysis of voltage profile during charging and discha...

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... parameters defined previously would be used to find the EOD. From Figure 2, it is clearly visible that difference between V peak and V trough starts increasing near the EOD and V trough shows a sharp decrease which is char- acterized by the parameter N , where the difference between V peak and V trough is taken into account by dv. Sometimes, in order to perceive the sharp decrease of V trough , rate of increase of N may have to be checked, for which dN is defined. ...

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Citations

... Autonomous determination would provide a wide range of new capabilities and depending on the method, could provide a great deal of insight into the battery condition or SoH. A detection algorithm was proposed for a smart charger in [7] but requires a full discharge of the battery. Reference [8] presented a battery chemistry identification scheme through defining a battery voltage gradient, but required heavy discharge rates to work and was only verified and tested on smaller cell capacities. ...
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