Battery pack protective circuit with external terminals on opposite side of part mounting surface of circuit board
AssigneeMitsumi Electric Co., Ltd.
InventorsMasaki Mori, Yasuhisa Higashijima
Life of this patent
Estimating the term…
Abstract
What is proposed is a battery pack incorporating a lithium ion battery. The battery pack has: a circuit board (10A) of the type that parts are mounted on one surface thereof, on the part-mounting surface (11A) of which a plurality of circuit parts (20) forming a protective circuit (60) for preventing the over-charge and over-discharge of the battery; and resin (30A) which seals the whole part-mounting surface of the circuit board after the circuit parts have been mounted thereon. Transistors (Q1 and Q2) and ICs (IC1 and IC2) employed as the circuit parts are bear chips.
Claims4
A battery pack incorporating a lithium ion battery comprising:
- a circuit board incorporated within a mobile communication device said circuit board having parts mounted on only a single surface thereof, said part-mounting surface including a plurality of circuit parts including bare chips forming a protective circuit for preventing over-charge and over-discharge of said battery;
- resin sealing the whole part-mounting surface of said circuit board including all of said circuit parts forming the protective circuit;
- and
- external connecting terminals of said protective circuit formed on a surface opposite to said part-mounting surface of said circuit board,
- wherein said protective circuit is connected through through-holes to said external connecting terminals.
A battery pack incorporating a lithium ion battery comprising:
- a circuit board incorporated within a mobile communication device said circuit board having parts mounted on only a single surface thereof, said part-mounting surface including a plurality of circuit parts forming a protective circuit for preventing over-charge and over-discharge of said battery;
- resin sealing at least said protective circuit of said part-mounting surface of said circuit board after said circuit parts have been mounted thereon;
- and
- external connecting terminals of said protective circuit formed on a surface opposite to said part-mounting surface of said circuit board, and connected through through-holes to said protective circuit,
- wherein said circuit parts including transistors and integrated circuits are bare chips.
Dependencies are inferred from the claim text.