Battery Pack for Use with Hand-Held Electric Power Tool

A battery pack (10;

• 110) adapted for use with a hand-held, electric power tool, comprising:
• a housing (18) comprised of a rigid material, the housing containing a cooling air passage (54) therein, which is in gaseous communication with the outside environment, and at least one isolated space (52), which is isolated from the cooling air passage;
• at least one isolating wall (44) disposed inside the housing so as to physically separate and isolate the cooling air passage from the at least one isolated space;
• and
• a circuit board (36) disposed within the housing and extending through the at least one isolating wall such that an end portion (36a) of the circuit board is disposed within the at least one isolated space (52) and an intermediate portion (36b) of the circuit board is disposed adjacent to the cooling air passage (54),
• wherein:
• at least one second portion (82) of the at least one isolating wall (44) contacting the circuit board (36) is comprised of a material that is more flexible and/or elastic than the rigid material of the housing (18).