Patent ID: 9196879
Filing Date: 2015-11-24
Classification: H01M,Y02E

Abstract:
1. A battery pack configured to be able to be mounted on a tool body of an electric tool as a power source of the electric tool, the battery pack comprising: a housing case configured as an outer cover, the housing having a first side wall and a second side wall, the second side wall extending substantially in parallel with the first side wall; a plurality of battery cells disposed in the housing case, the plurality of battery cells being disposed such that longitudinal axes of the plurality of battery cells extend substantially parallel to each other from a side of the first side wall toward a side of the second side wall, a drainage device provided at a bottom portion of the housing case and having a drain hole communicating between an inside and an outside of the housing case, the drainage device being configured to discharge water introduced into the housing case to the outside of the housing case through the drain hole, and a first terminal member and a second terminal member each connected to at least one of electrodes of the plurality of battery cells, both the first terminal member and the second terminal member being disposed adjacent to the first side wall and along the first side wall so that the first terminal member and the second terminal member face the first side wall, wherein the drainage device is disposed at least between the first terminal member and the second terminal member.