Patent ID: 7846577
Filing Date: 2010-12-07
Classification: B25F,H01M,Y02E

Abstract:
1. A battery pack comprising: a plurality of prismatic rechargeable batteries, each of which is formed by accommodating an electrode assembly and a liquid electrolyte in a battery case and sealing an open end of the case with a sealing plate, an electrode terminal being provided in the sealing plate; a circuit substrate formed with a battery management circuit for managing the operating state of each rechargeable battery; and a pack case for accommodating the rechargeable batteries and the circuit substrate, wherein: the plurality of rechargeable batteries are held by a frame in such an arrangement that the batteries are oriented in the same direction on their sealing-plate side, whereby the plurality of rechargeable batteries are integrated; the circuit substrate is mounted to the frame for holding the sealing-plate side of the plurality of rechargeable batteries; and a resin mold is provided for covering a necessary surface of the circuit substrate with a resin after the circuit substrate is electrically connected to the rechargeable batteries and to input and output terminals; and the plurality of rechargeable batteries are surrounded by the frame, the frame including a center frame having a plurality of battery accommodating openings, each battery accommodating opening having a shape and dimensions matching the cross section of the lengthwise center of the battery, the battery accommodating openings holding center parts of the batteries and arranging the rechargeable batteries in parallel spaced relationship; a bottom frame having bottom accommodating parts that receive bottoms of the rechargeable batteries; and a terminal side frame attached to the circuit substrate and having sealing part accommodating parts that receive sealing plate sides of the rechargeable batteries.