| 摘要 |
A battery monitoring apparatus is built in a device having a primary battery. The battery monitoring apparatus includes a voltage measuring module configured to obtain an open circuit voltage of the primary battery and an output voltage of the primary battery at the time when a load current flows, a current measuring module configured to obtain the load current, a first resistance value calculating module configured to obtain a first internal resistance of the primary battery based on the open circuit voltage, the load current and the output voltage, a second resistance value calculating module configured to obtain a second internal resistance of the primary battery at which the device can operate normally based on the open circuit voltage, the load current and the minimum drive voltage, and an alarm outputting module configured to output a battery life alarm when the first internal resistance is larger than the second internal resistance. |
