| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that when a load is connected to a middle point terminal between secondary battery cells connected in series, electric discharging cannot be prohibited until voltage reaches set voltage of over-discharging, and when power source is supplied to the middle point terminal, electric charging cannot be prohibited until the voltage reaches set voltage of overcharging.SOLUTION: A battery pack comprises: a plurality of secondary battery cells connected in series; at least one middle point terminal that is connected at least to a connection part between the secondary battery cells among the plurality of secondary battery cells; and at least one switch connected between the connection part and the middle point terminal. |
