| 摘要 |
A secondary battery device charging apparatus includes a number of first terminals, a pair of second terminals, a power supply circuit, a switching element and a control circuit. The secondary battery device includes an even number of secondary batteries arranged with electrodes facing in mutually opposite directions, a middle spacer set up between the secondary batteries, a thermistor set up at the middle spacer so as to be thermally in contact with the secondary batteries, a pair of electrodes set up at the middle spacer and a uniting member for uniting the secondary batteries together into a single item. The pair of electrodes are arranged symmetrically with respect to the mechanical center of the secondary batteries and the thermistor is connected to the pair of electrodes. When the secondary battery device is installed, the number of first terminals come into contact with each of their corresponding second battery electrodes. When the secondary battery charging device is installed, the switching element is turned on by the control circuit so that a charging current from the power supply circuit is supplied via the two first terminals which are positioned at the beginning and the end of the number of first terminals so as to charge the secondary batteries. At the time of charging, the temperature of the secondary batteries is detected from the voltage for the pair of second terminals so that when the detected temperature is not a suitable temperature for passing a current through the secondary batteries, the switching element is turned off and charging is halted.
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