Patent ID: 9548484
Date: 2017-01-17
CPC Classifications: H01M,Y02E

Claim:
1. A battery unit comprising: a battery; a control board on which an electronic device is mounted to control an operation of the battery; a storage case in which the battery and the control board are installed, the storage case including a first casing member and a second casing member joined to the first casing member, the first casing member having a bottom on which the battery is mounted and an upright wall which extends from the bottom and surrounds the battery, the second casing member having the battery interposed between itself and the first casing member, the second casing member also having an extension which extends vertically, the extension having an upper end joined to the second casing member and a lower end opposed to the upper end, the lower end extends toward the bottom of the first casing member, the lower end faces the bottom inside the upright wall of the first casing member; a substrate with a mounting surface, the substrate extending vertically; a water detector which is mounted on the mounting surface of the substrate, the mounting surface being secured to a lower end of the extension and extending in a vertical direction of the storage case, the water detector working to detect presence of water having entered the storage case; and an electric conductor which extends from the substrate, passing through the thickness of the extension vertically and further extending upward from the upper end of the extension, the electric conductor being electrically joined to the water detector, the electric conductor being also mechanically joined to the control board at a point vertically above the upper end of the extension, so as to establish an electrical connection with the control board which is mounted in place within the storage case.