There is disclosed a battery pack, which has a plate-shaped resin-formed body to divide an internal space of the battery pack into at least two spaces in a thickness direction thereof, so that a battery is received in a first internal space, while a wiring substrate having a control circuit packaged thereon is placed in a second internal space, thereby allowing the battery pack to hold an input/output circuit or the like of a memory card securely in a limited space in the battery pack, while ensuring that a sufficient insulation is provided to the battery, when the battery pack is used for PDA'S, for instance.
1. A battery pack attached to an electronic apparatus for supplying a power thereto, comprising:
a battery for outputting said power;
a resin-formed body laminated together with said battery to be held by said battery; and
an exterior housing for holding said battery and said resin-formed body;
wherein said resin-formed body holds, along said battery, a first wiring substrate having electronic components surface-mounted on a battery side-face thereof and a second wiring substrate having electronic components surface-mounted on the opposite face to the battery side-face of said first wiring substrate while having no surface-mounted electronic component on a battery side-face thereof; and
said electronic components surface-mounted on said first wiring substrate include a control circuit for controlling the power of said battery.
2. The battery pack according to claim 1 , wherein said first wiring substrate is connected to said second wiring substrate, and said second wiring substrate is connected to said electronic apparatus in a portion of said exterior housing in which a terminal for outputting the power is provided.
3. The battery pack according to claim 1 , wherein said second wiring substrate is connected to said electronic apparatus through said first wiring substrate.
4. The battery pack according to claim 1 , wherein said resin-formed body has openings on portions that correspond to the electronic components mounted on said second wiring substrate.
5. The battery pack according to claim 1 , wherein said electronic components surface-mounted on said second wiring substrate configure an input/output circuit between an external apparatus and the battery pack.
6. The battery pack according to claim 5 , wherein said external apparatus is a cash card-shaped IC card, and said exterior housing and said resin-formed body have a space for receiving said IC card, said space being formed on the opposite side to the battery side thereof.
7. The battery pack according to claim 1 , wherein said battery is a non-aqueous secondary battery, and said control circuit not only controls the supply of said power from said battery but also controls a charging of said battery.