| 摘要 |
The battery pack has a battery block 10 having a plurality of battery cells 1 housed in a battery holder 2, a first circuit board 6 attached to the battery holder 2 to carry a first protection circuit 25 that can detect battery cell 1 abnormality and cut-off current flow, a second circuit board 9 to carry a second protection circuit 26 which is capable of detecting battery cell 1 abnormality and cutting-off current flow independently from the first protection circuit 25, an outer case 4 to house the battery block 10, and an output connector 15 established on the outside the outer case 4 to deliver battery block 10 output to the outside. The second circuit board 9 is smaller than the first circuit board 6 and is disposed in a corner region inside the outer case 4 physically separated from the first circuit board 6. |
