The Suitable charging temperature
Posted on July 30th, 2010 in Uncategorized | Comments
Charging at high and low temperatures
Rechargeable laptop battery operate in a reasonably wide temperature range. However, this does not automatically allow a charge in the same temperature range. While the use of batteries in hot or cold environment can not be avoided, the users, the conditions during the load somewhat under control. The charge should be strictly carried out at moderate temperatures.
In general, older battery technologies, such as Nickel-cadmium, tolerant loading at extreme temperatures. Nickel-cadmium DELL Inspiron B120 battery, Dell Inspiron 8600 battery can be recharged with a quick charge within approximately 1 hours. Such a fast charging should be done within the temperature range from 5 ° to 45 ° C. An even narrower temperature range from 10 ° to 25 ° C, however, yields better results.
Charging below 5 ° C caused a reduced Ladekoeffizienten of 0.1 C (one tenth of the capacity). This is in the area where oxygen and hydrogen inside the cell can be reduced. Due to the declining settings at lower temperatures, leading to a too fast charging excessive cell pressure, which can lead to a Zellenleck. Such as Dell Inspiron 5100 battery ,Dell XPS M140 battery can be charged under these conditions fully before.
Industrial Dell XPS M1210 battery that require rapid charging at low temperatures, include a thermal circuit to keep the battery in a temperature range to be allowed. As soon as the charging temperature is lower than is produced during the loading process gas, which in turn leads to a warming, and thus improve the loading conditions. The ideal charger automatically adjusts itself so that there is a balance between gas and charging.
Note the use of charging temperature on the Ni-MH battery that is particularly important. Should be in the 0 ° C to 40 ° C of ambient temperature batteries. Below 0 ° C under an internal rechargeable battery charge will not normally lead to irreversible performance continued to decline. Higher than 40 ° C charge, will lead to the possibility of leakage.
MAX8671X include thermal management, even in the heat conditions are not ideal for small handheld devices are also able to avoid overheating. When the temperature exceeds 100 ℃ die, it will be in compliance with the 5% / ℃ reduce the input current. In all circumstances, ISYS higher priority than current feedstock, therefore, reduce the input current is reduced when the first charge current. If the charge current is reduced, the junction temperature reaches 120 ℃ well, no more, the current input power from the battery to power the system load. Chip temperature limit circuit and thermistor input (THM) has nothing to do, work processes independently, THM general use of the external thermistor input monitors the battery temperature (typical applications).
