| Title |
Temperature-compensated Overcharge Protction Indirect Measurement Circuit |
| Authors |
연진욱(JinUk Yeon) ; 오인열(Innyeal Oh) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.8.912 |
| Keywords |
Battery; Battery Management System(BMS); Isolation; Indirect Voltage Measurement; LED |
| Abstract |
Recently, many problems have been caused by battery fires. The existing BMS measured the voltage of each cell of the battery through the physical connection between the battery and the control module. However, if a battery with up to 1000 VDC becomes inoperable due to an external factor, the battery is damaged, and accordingly, a large current of the battery breaks the control unit of the BMS with 5 VDC to 24 VDC, putting the BMS inoperable. If the BMS continues to operate the battery inoperable, it poses a risk of battery fire. This paper physically separated the battery and control module by measuring the battery voltage depending on the strength of the LED by connecting the battery and LED and designed it to have an error within 5 mV even if a temperature changes from 20 to +60 . In addition, it was designed 刪 ? ? to operate at a low output level of 200 W to 360 W ? ? using the subthreshold section of the LED. This paper designed a slab board that directly measures battery voltage and operates by a master board that can handle up to 256 pieces. It is configured to correspond to a system composed of a plurality of battery cells. |