Patent ID: 9246198
Filing Date: 2016-01-26
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A method for determining an end of charging condition of a battery pack assembly, the battery pack assembly comprising a stack of a plurality of lithium ion accumulators, each of the accumulators having a negative electrode formed with at least one alloy and being held in place with a lateral mechanical support laid out in a plane normal to a direction in which a main deformation of the accumulator occurs, the method comprising: detecting a surface pressure with a determined force between external portions of facing accumulators, said surface pressure being generated by a thickness increase of one or more of the accumulators, due to ion insertion at its negative electrode and thereby defining the end of charging condition, the thickness increase being detected by contactors or force sensors positioned on an external portion of packaging of the facing accumulators, each of the contactors or force sensors being capable of being in a first state or a second state, the first state corresponding to a discharge state in which the contactor or the force sensor of one of the facing accumulators is at a distance from or bearing upon a surface under the determined force from the external portion of the packaging of another one of the facing accumulators, the second state corresponding to a charge state in which the contactor or the force sensor of the one of the facing accumulators bears upon the surface against the external portion of the packaging of the other one of the facing accumulators with the determined force.