Patent ID: 7125628

Claim:
A battery pack comprising: a plurality of rectangular shaped batteries, wherein each of the plurality of rectangular shaped batteries is formed into a thin rectangular-parallelepiped shape, and wherein the plurality of rectangular shaped batteries are stacked side-by-side in a thickness direction, and each battery includes a pin and a recess, the recess having a slot shape, said slot shape being longer in a width direction of the battery than in a height direction of the battery; and a pair of pressurizing plates, wherein one of the pressurizing plates is located at each end of the stacked rectangular shaped batteries oriented in the thickness direction and one of the plates is fitted with a compression spring which serves as an elastic member, wherein the pressurizing plates are elastically pushed against each other to pressurize the plurality of rectangular shaped batteries using the compression spring, wherein at least a pair of the rectangular shaped batteries stacked adjacent each other are stacked in a manner such that the pin of a first battery of the pair is inserted into the recess of a second battery of the pair so that movement in the height direction of the stacked rectangular shaped batteries, which is orthogonal to the thickness direction, is suppressed, and the pin of the first battery eon slide along the width direction inside the recess of the second battery, wherein a positive terminal plate and a negative terminal plate are provided on respective side surfaces of the rectangular shaped batteries along a width direction of the stacked rectangular shaped batteries, which is orthogonal to the thickness direction, the positive terminal plate being in contact with a negative terminal plate of one adjacent rectangular shaped battery and the negative terminal plate being in contact with a positive terminal plate of the other adjacent rectangular shaved battery.