Patent Number: 6,294,894

Title: Rechargeable battery arrangement

Abstract: A rechargeable battery arrangement in which total service capacity for discharge from full charging to a final discharge voltage varies according to discharge conditions for discharging charged electric charge, comprising: an integration member which integrates quantity of electric charge discharged between a point of start of discharge after charging and the present; a data storage member for storing a plurality of total service capacities for discharge at a plurality of values of discharge current, respectively in unique association with a specific one of the total service capacities for discharge at a specific one of the values of discharge current; a current detection member for detecting a present value of discharge current; and a calculation member which obtains, from data obtained by the data storage member on the basis of the present value of discharge current detected by the current detection member, a total service capacity corresponding to or closest to the present value of discharge current and calculates, from the total service capacity and an integrated value obtained by the integration member, a residual capacity of electric charge for discharge.

Inventors: Ochiai; Makoto (Oyama, JP), Suzuki; Masato (Toride, JP)

Assignee: Hitachi Maxell, Ltd.

International Classification: G01R 31/36 (20060101); H01M 010/46 ()

Expiration Date: 09/25/2018