Patent ID: 6749649
Filing Date: 2004-06-15
Classification: H01M,Y02E,Y10T

Abstract:
A method of attaching a battery cell in an apparatus acted upon by centrifugal force, comprising:providing the battery cell which includes a positive polarity material and a negative polarity material which are placed in opposition in a battery case with an intervening separator disposed between the positive polarity material and the negative polarity material extending generally alone preference plane of the battery case, said battery cell further including a liquid electrolyte packed inside said battery case; and mounting said battery cell in said apparatus, the battery cell being oriented such that a negative polarity material side of said battery cell faces generally in a direction in which said centrifugal force acts on said apparatus, and an angle of inclination of a thickness direction of said battery cell which runs perpendicular to said reference plane is within a range of 0 to about 60 degrees relative to the direction of said centrifugal force such that an extreme decline in discharge capacity of said battery cell is avoided when acted upon by the centrifugal force.