| 摘要 |
<p>CPU power consumption is throttled in relation to the discharge current 62 of a battery pack 40 to prevent battery cells of the battery pack from reaching a critical temperature. When a discharge current measuring circuit 68 detects that discharge current exceeds a threshold level 72, a throttle signal 74 is activated. In response, a CPU stop control line 52 is modulated to reduce CPU power consumption. When the discharge current falls below another threshold and/or after a prescribed time delay, the throttle signal is withdrawn. The duty cycle T of the CPU stop control line is determined as a function of the excess discharge current (i.e., actual discharge current level less safety threshold current level). The more excessive the actual discharge current, the larger the duty cycle on the CPU stop modulation line, and the greater the degree that CPU power consumption is reduced. <IMAGE></p> |
