Battery pack

A battery pack comprising:

• a battery including a plurality of cells connected in series;
• a detector configured to detect a voltage of each of the plurality of cells;
• and
• a wire harness configured to connect the battery and the detector, wherein
• the wire harness includes
• a first cell voltage line group and a second cell voltage line group, wherein a plurality of cell voltage lines, which are electrically connected to a plurality of voltage detection locations that are one end and other end of series connection of the plurality of cells and at least one midpoint between the cells adjacent to each other in an order of the series connection, are distributed into the first cell voltage line group and the second cell voltage line group in a predetermined order from the cell voltage line at the one end to the cell voltage line at the other end,
• a first harness connector in which a first cell voltage terminal group connected to the first cell voltage line group is arranged in a pattern that maintains the predetermined order, and
• a second harness connector in which a second cell voltage terminal group connected to the second cell voltage line group is arranged in the pattern and which has a same shape as the first harness connector,
• the detector includes
• a first unit connector connected to the first harness connector, and
• a second unit connector connected to the second harness connector,
• the first harness connector and the first unit connector are provided with one or more empty terminal positions where no terminal is disposed,
• the second harness connector and the second unit connector are provided with one or more empty terminal positions where no terminal is disposed, and
• a terminal arrangement in the first harness connector and the first unit connector is different from a terminal arrangement in the second harness connector and the second unit connector.