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Battery pack
| Details |
Inventors: Hayama, Hideki; Tanaka, Haruhiko; Takeishi, Ryuta; Kurihara, Yu;
Assignee: Toshiba Battery Co., Ltd. (Tokyo, JP)
Primary Examiner: Tso; Edward H.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
A battery pack has a flat battery cell, which includes a flat electric power generating element, at least one armor material for sealing the electric power generating element, and positive and negative tabs (1a, 2a) extending from the electric power generating element to the outside of the armor material through a sealing of the armor material; a circuit board (6) connected to the positive and negative tabs; and a container (16) having two main walls extending along two main surfaces of the flat battery cell. At least a portion of the circuit board is positioned in a space (8) defined by a sealing of the armor material beside the circuit board and the inner surface of the container. At least one of the two main walls of the container is at least partially formed of a metal plate (12a, 14a). |
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DETAILED DESCRIPTION It is an object of the present invention to provide a battery pack comprising a container which is reduced in wall thickness while ensuring a required strength thereof.
It is another object of the present invention to provide a battery pack which can be reduced in size, particularly, in the two-dimensional size, by making use of a dead space within a container.
It is a further object of the present invention to provide a battery pack which is capable of providing a firm engagement between a connection of an electronic device and a connection of the battery pack mounted thereto, so that a failed electric connection is avoided even when an external force is applied to cause deformation of the electronic device and/or the battery pack.
It is a further object of the present invention to provide a battery pack which can be further reduced in thickness by reducing the height dimension of sealings of an armor material, which are bent in the height direction of a battery cell, on the circuit board side.
It is a further object of the present invention to provide a battery pack which is reduced in the two-dimensional size by electrically connecting positive and negative tabs of a flat battery cell directly to connection terminals of a circuit board.
It is a further object of the present invention to provide a battery pack which simplifies a feature involved in electric connection between the battery pack and an electronic device, to which the battery pack is mounted, and has a reduced dimension in the height direction of the battery pack in this electric connection feature.
It is a further object of the present invention to provide a battery pack which increases the strength of connection between positive and negative tabs of a flat battery cell and lands of a circuit board.
It is a further object of the present invention to provide a battery pack which has an excellent excessive current protection function for protecting a battery cell from an excessive current due to external short-circuiting
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Metal Working 
