| 摘要 |
<p>In a battery pack which comprises: a battery set 2 composed of two or more lithium battery cells 21 connected in series; a first protection circuit 32 including a first voltage detect part 321 for detecting the voltage (s) of a part of the two or more battery cells, and a first signal output part 325 for issuing an output signal when a detect voltage detected by the first voltage detect part 321 goes below a given over-discharge judgment voltage value; a second protection circuit 33 including a second voltage detect part 331 for detecting the voltage(s) of another part of the two or more battery cells, and a second signal output part 335 for issuing an output signal when the detect voltage of the battery cell 21 detected by the second voltage detect part 331 goes below a given over-discharge judgment voltage value; and, a switch 31 which is connected to the current path of the battery set 2 and can be turned on or off according to the output signals of the first and second signal output parts 325 and 335, there is further provided dead time means 6 connected between the second signal output part 335 of the second protection circuit 33 for issuing an output not responding to a variation in an input signal occurring within a given time.</p> |
