Electric energy storage device with cell energy control, and method of controlling cell energy
First Claim
1. An energy storage device comprising a unit energy storage device having a plurality of capacitor cells or secondary battery cells connected in series to each other;
- and a cell energy adjusting device which transfers energy charged in one cell selected from said plurality of cells to input/output terminals of said unit energy storage device from the selected one cell, said cell energy adjusting device comprising;
a transformer having a plurality of primary coils and a secondary coil electrically insulated and mutually coupled magnetically;
a switching circuit which opens and closes a connection circuit connecting between said selected one cell and one coil among said plurality of primary coils;
a circuit connecting the secondary coil of said transformer to the input/output terminals of said unit energy storage device through a rectifying circuit; and
, a control circuit which, by driving said switching circuit, adjusts the energy amount stored in said selected one cell to a specific ratio with respect to the overall energy amount stored by said unit energy storage device.
2 Assignments
0 Petitions
Accused Products
Abstract
An energy adjusting device is provided which transfers energy charged in an arbitrary cell to the input/output terminals of a unit energy storage device. The energy adjusting device includes a transformer having a plurality of primary coils and a secondary coil mutually coupled magnetically but electrically insulated, switching circuits which open and close the circuits of the primary coils of the transformer connected to the arbitrary cell, a circuit connecting the secondary coil of the transformer via a rectifying circuit to the input/output terminals of the unit energy storage device, and a control circuit which, by operating the switching circuits, adjusts the amount of energy stored in the cells to a specific ratio with respect to the amount of energy stored by the unit energy storage device.
-
Citations
33 Claims
-
1. An energy storage device comprising a unit energy storage device having a plurality of capacitor cells or secondary battery cells connected in series to each other;
- and a cell energy adjusting device which transfers energy charged in one cell selected from said plurality of cells to input/output terminals of said unit energy storage device from the selected one cell, said cell energy adjusting device comprising;
a transformer having a plurality of primary coils and a secondary coil electrically insulated and mutually coupled magnetically;
a switching circuit which opens and closes a connection circuit connecting between said selected one cell and one coil among said plurality of primary coils;
a circuit connecting the secondary coil of said transformer to the input/output terminals of said unit energy storage device through a rectifying circuit; and
,a control circuit which, by driving said switching circuit, adjusts the energy amount stored in said selected one cell to a specific ratio with respect to the overall energy amount stored by said unit energy storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
energy allocation means comprising at least one of a circuit and software for determining a ratio of energy amount to be stored in each of the cells in said unit energy storage device with respect to the energy amount stored by said unit energy storage device, when charging and discharging of the unit energy storage device are performed repeatedly, the unit energy storage device is left standing in a state in which an arbitrary amount of energy is stored, or the unit energy storage device is repeatedly left and charged/discharged; and
a function for learning the appropriate amount to be stored in each of the cells from at least one of characteristics of each cell including an initial state thereof, and prediction of charging/discharging of the unit energy storage device.
- and a cell energy adjusting device which transfers energy charged in one cell selected from said plurality of cells to input/output terminals of said unit energy storage device from the selected one cell, said cell energy adjusting device comprising;
-
12. A large-capacity energy storage device comprising a plurality of unit energy storage devices connected in series to each other, each of the unit energy storage devices comprising a plurality of capacitor cells or secondary battery cells connected in series to each other, said large capacity energy storage device having a higher terminal voltage than each of the unit energy storage devices while storing a larger amount of energy than each of the unit energy storage devices, and said large-capacity energy storage device including a cell energy amount adjusting device which is a device to transfer energy charged in one selected cell to the input/output terminals of one said unit energy storage device from the one selected cell, and which comprises a transformer having a plurality of primary coils electrically insulated and mutually magnetically coupled and a secondary coil;
- a switching circuit to open and close a connection circuit connecting between said one selected cell and one of said primary coils of said transformer;
a circuit connecting the secondary coil of said transformer to the input/output terminals of the one said unit energy storage device through a rectifying circuit; and
a control circuit for driving said switching circuit to adjust the amount of energy stored in each of the cells to a specific ratio with respect to the energy amount stored by the one said unit energy storage device; and
whereina relationship between said unit energy storage devices and the large-capacity energy storage device is made similar to another relationship between said energy cells and the one said unit energy storage device, or connections of said unit energy storage devices are further expanded to a prescribed number of layers.
- a switching circuit to open and close a connection circuit connecting between said one selected cell and one of said primary coils of said transformer;
-
13. An energy storage device comprising a plurality of unit energy storage devices connected to each other, each having a single electrical energy storage cell or a plurality of electrical energy storage cells;
- wherein
each of said unit energy storage devices has a cell energy adjustment device which measures the amount of energy of the unit, memorizes and processes said measured amount of energy, and controls operation of switching circuits, to transfer energy charged in a selected one unit energy storage device via a transformer;
a plurality of coils are provided corresponding to each of said unit energy storage devices;
transformers are provided corresponding to respective unit energy storage devices;
a circuit is configured connecting transformer coils, switching circuits, and rectifying circuits; and
energy is directly transferred from the selected one unit energy storage device to another unit energy storage device. - View Dependent Claims (14, 15, 16, 17)
- wherein
-
18. A cell energy adjustment method in which a plurality of energy storage devices each comprising a single electrical energy storage cell or a plurality of electrical energy storage cells, are connected in series to each other;
- a device for measuring the energy amounts of respective energy storage devices to memorize and process the measured results is provided; and
energy charged in a selected one of the energy storage devices is transferred through a transformer by operating switching circuits controlled by the device;wherein transformers are provided corresponding to the respective energy storage devices, coils of said transformers are connected to the switching circuits and rectifying circuits, and energy is transferred directly from any one of the energy storage devices to another one of the energy storage devices. - View Dependent Claims (19, 20, 21, 22)
- a device for measuring the energy amounts of respective energy storage devices to memorize and process the measured results is provided; and
-
23. An electrical energy storage device comprising a plurality of unit energy storage devices connected in series to each other each having a single electrical energy storage cell or a plurality of electrical energy storage cells, and comprising a cell energy adjustment device;
- wherein
said cell energy adjustment device is provided with a device to measure the energy amounts of each of the unit energy storage devices, to memorize and process said measured energy amount, and to control operation of switching circuits, to transfer, via a transformer, energy charged in any one of the unit energy storage devices; and
a plurality of coils are provided corresponding to each of said unit energy storage devices;
transformers are provided corresponding to respective energy storage devices;
a circuit is configured connecting the transformer coils, switching circuits, and rectifying circuits; and
energy is transferred directly from a selected one unit energy storage device to another unit energy storage device.
- wherein
-
24. An energy storage device comprising a plurality of energy storage cells connected in series to each other and a cell energy adjustment device to adjust the energy amount of each of the cells;
- wherein
said energy adjustment device comprises first switching circuits connected in series to said energy storage cells, and a first transformer comprising a plurality of coils connecting said first switching circuits to said series of the energy storage cells; and
each of said first switching circuits comprises a first FET and either one of a diode connected in series to and in a direction opposed to a first parasitic diode of said first FET or a second FET having a second parasitic diode in a direction opposed to said first parasitic diode of said first FET.
- wherein
-
25. An energy storage device comprising a plurality of first energy storage devices connected in series to each other, and an energy adjustment device which adjusts the energy amounts of said first energy storage devices;
- wherein
said energy adjustment device comprises first switching circuits connected in series with said first energy storage devices, and a first transformer comprising a plurality of coils connecting said first switching circuits to said first energy storage devices; and
each of said first switching circuits comprises a first FET, and either one of a diode connected in series to and in a direction opposed to a first parasitic diode of said first FET or a second FET having a second parasitic diode in a direction opposed to said first parasitic diode of said first FET. - View Dependent Claims (26, 27, 28)
each of said first energy storage devices comprises a plurality of second energy storage devices; - and second switching circuits connected in series to said respective second energy storage devices;
each of said switching circuits is connected in series to each of said second energy storage devices and one of the coils of a second transformer comprising a plurality of coils; and
,
each of said second switching circuits comprises a third FET and either one of a diode connected in series to and in a direction opposed to a third parasitic diode of said third FET or a fourth FET having a fourth parasitic diode in a direction opposed to said third parasitic diode of said third FET.
- wherein
-
27. The energy storage device according to claim 26, wherein each of said second energy storage devices comprises a single capacitor or a single secondary battery.
-
28. The energy storage device according to claim 26, wherein each of said second energy storage devices comprises a plurality of capacitors or a plurality of secondary batteries, connected in series to each other.
- 29. A cell energy adjustment device for adjusting the energy amount of each of cells in a plurality of first energy storage devices, wherein a first switching circuit is formed by a FET and Schottky barrier diode connected in parallel to each other, said first switching circuit is connected in series to one of said first energy storage devices and to one coil of a first transformer comprising a plurality of coils, and a plurality of first energy storage devices connected to coils of said first transformer are connected in series to each other.
Specification