| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack capable of directly extracting a midpoint potential between accumulator batteries to a circuit board without performing a wiring work, and of drastically reducing the number of components for wiring.SOLUTION: A plurality of first conduction support pillars 5A support between a pair of holding plates 3A and 3B, and a plurality of second conduction support pillars 5B are coupled to the first conduction support pillars 5A to support between one holding plate 3A and a circuit board 4. In a battery pack 1, connection tabs 6A-6E located at an intermediate part 22 where the cylindrical accumulator batteries 2A-2D are electrically connected in series and that are contacted with electrodes 21 of the cylindrical accumulator batteries 2A-2D, and a conductor part 41 in the circuit board 4 are conducted by means of the first conduction support pillars 5A and the second conduction support pillars 5B. The circuit board 4 is configured to measure a midpoint potential at the intermediate part 22 by using the first conduction support pillars 5A and the second conduction support pillars 5B.SELECTED DRAWING: Figure 1 |
