| 摘要 |
PROBLEM TO BE SOLVED: To prevent any interference with a radio body due to induction to a battery by a radiated wave from a portable radio so as to suppress deterioration of characteristics of the radio by forming shield layers for preventing intrusion of a high-frequency wave into a case, at the inner face of the case containing a battery cell therein. SOLUTION: Shield layers 4 are formed at the inner face of a case 2 made of a plastic resin and the inner face of a bottom cover 10 such that the shield layers are electrically connected to each other to have the same potential when the bottom cover 10 is disposed in the case 2. The shield layers 4 are formed by, e.g. aluminum deposition. Furthermore, the shield layer 4 is electrically connected to a discharge terminal 5 (negative electrode), and an insulative layer 7 is disposed at a section opposite to metal fittings 6, 6... or the like for wiring at its inner faces, thereby keeping electric insulation. Consequently, a radiated wave from a portable radio antenna can hardly intrude into a battery and can be shielded by the shield layers 4. |
