Battery temperature compensating device for battery...

H - Electricity – 02 – J

Patent

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H02J 7/10 (2006.01) H02J 7/00 (2006.01)

Patent

CA 2121338

A retro-fit temperature compensating device (T.S., JP3, JP2, J1, S) regulates the output voltage (V) of a rectifier (R) or "charger" connected to a rack or bank (B) of serially connected batteries (BAT). The temperature (T) of the battery (BAT) is sensed (S) and the temperature compensating device (TS) regulates the effective voltage (V) applied by the rectifier or charger (R) to the battery terminals (JP2, JP1) according to a pre-selected slope (figure 2) as the manufacturer may have determined from a referenced temperature, generally fixed at 25 °C. The device (TS, JP3, JP2, JP1, S) may be retro-fitted to existing charging units (R) and the device maintains the float voltage on, for instance, a 48V battery string (B) at the manufacturer's recommended charge rate, having a deviation or slope, of 72 mV for every °C of temperature change about the reference voltage 25 °C of the string (B) or single battery (BAT); hence, life expectancy of each battery (BAT) of the string (BB) for the full life term of 10 years may be more adequately achieved.

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