Battery pack
AssigneeNEC Infrontia Corporation
InventorHirotsugu Matsuyama
Life of this patent
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Abstract
A chargeable battery or a battery pack stores electrical energy, and supplies the electrical energy to a portable terminal device connected to the battery pack. A display device of the battery pack derives a value of a current flowing through a sensor which is connected to the chargeable battery. The display device derives the remaining amount of electrical energy stored in the chargeable battery, by adding up the derived current value. The display device includes a plurality of photodiodes, and shows the remaining amount of electrical energy stored in the chargeable battery, by lighting up corresponding number of photodiodes corresponding to the derived remaining amount.
Claims11
A battery pack comprising:
- a chargeable battery which provides electrical energy;
- a resistor circuit connected to said battery;
- a connection to an external power source that provides electrical energy;
- a solar panel that converts light energy into electrical energy;
- a power source interface connected to said solar panel and to said connection to an external power source, said power source interface providing electrical power from one of said solar panel and said connection to an external power source to said battery to charge said battery;
- a microcomputer which derives a remaining amount of electrical energy available from said battery by adding current flowing through said resistor circuit;
- and
- a first display which shows the remaining amount derived by said microcomputer.
A battery pack comprising:
- a chargeable battery which provides electrical energy;
- a solar panel that converts light energy into electrical energy;
- a connection to an external source of electrical energy;
- an interface that connects said battery to a one of said solar panel and said connection that provides a greater amount of electrical energy, to charge said battery;
- a microcomputer which derives a remaining amount of electrical energy available from said battery by adding current flow to and from said battery;
- and
- a first display which shows the remaining amount derived by said microcomputer.
Dependencies are inferred from the claim text.