Power supply unit for electronic appliances
First Claim
Patent Images
1. A power supply unit for an electronic appliance, comprising:
- a power generator for generating electricity;
a power storage portion connected to the power generator and an electronic appliance, said power storage portion being formed of a plurality of cells having same capacities and arranged parallel to each other;
switches connected to the cells, one switch being connected to one cell in series, respectively, and one switch being arranged between the cells for connecting the cells in series;
a voltage detector circuit for detecting voltage supplied to the electronic appliance and providing signals to the switches so that arrangement of the cells is switched between a parallel connection and a series connection; and
an additional cell having a capacity smaller than that of the cells, said additional cell being arranged parallel to the cells so that a switching between the parallel connection and the series connection is smoothly made while a sudden voltage change in switching is absorbed.
1 Assignment
0 Petitions
Accused Products
Abstract
A power supply unit having a power generation portion 1 and a power storage portion 4 to supply power to an electronic watch 3. The power storage portion is formed by a plurality of cells 41, 42, each having the same capacity and having switches 51, 52 connected in series, a switch 53 is connected in series between the plurality of cells 41, 42, and these switches 51, 52, and 53 are switched by signals from a voltage detector circuit 6. This arrangement reduces initial actuation time and expands the time for which the electronic appliance continues to operate.
10 Citations
10 Claims
-
1. A power supply unit for an electronic appliance, comprising:
-
a power generator for generating electricity; a power storage portion connected to the power generator and an electronic appliance, said power storage portion being formed of a plurality of cells having same capacities and arranged parallel to each other; switches connected to the cells, one switch being connected to one cell in series, respectively, and one switch being arranged between the cells for connecting the cells in series; a voltage detector circuit for detecting voltage supplied to the electronic appliance and providing signals to the switches so that arrangement of the cells is switched between a parallel connection and a series connection; and an additional cell having a capacity smaller than that of the cells, said additional cell being arranged parallel to the cells so that a switching between the parallel connection and the series connection is smoothly made while a sudden voltage change in switching is absorbed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification