POWER SUPPLYING APPARATUS

• US 20100231167A1
• Filed: 03/10/2010
• Published: 09/16/2010
• Est. Priority Date: 03/11/2009
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: OHNUKI, Yasumichi
• Granted Patent: US 8,536,833 B2
• Time in Patent Office: Days
• US Class Current: 320/119
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/0018 using separate charge circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A power supplying apparatus for supplying power to a plurality of loads has been needed. Therefore, a power supplying apparatus for supplying power to a plurality of loads, including: a rectifying circuit connected to each of the plurality of loads; an AC circuit to sequentially connect between the rectifying circuits; and an AC generating circuit to apply AC voltage to the AC circuit, in which the AC circuit includes a capacitor and an inductor connected in series is provided.

Claims

1. A power supplying apparatus for supplying power to a plurality of loads connected in series, comprising:

a plurality of rectifying circuits connected to the plurality of loads respectively;

one or more AC circuits to sequentially connect the adjacent rectifying circuits; and

a plurality of AC generating circuits to apply AC voltages to the respective AC circuits;

wherein each of the AC circuits comprises a capacitor and an inductor connected in series.

2. The power supplying apparatus of claim 1, wherein:

products of the equivalent capacitances of the plurality of capacitors connected in series from the AC generating circuits to the respective rectifying circuits and the equivalent inductances of the plurality of inductors from the AC generating circuits to the respective rectifying circuits are set to be the same in any combination of the loads.

3. The power supplying apparatus of claim 1, wherein:

the AC circuits are configured to transmit two or more phases alternating currents.

4. The power supplying apparatus of claim 1, wherein:

the AC generating circuits generate AC voltages having frequencies which approximate to resonance frequencies of the series circuits of the capacitors and the inductors.

5. The power supplying apparatus of claim 1, wherein:

when AC voltages having frequencies which approximate to the resonance frequencies of the series circuits of the capacitors and the inductors are generated by the AC generating circuits and the amplitudes of input voltages of the respective rectifying circuits have deviations, the AC generating circuits adjust the frequencies of the generated AC voltages to keep the amplitudes of the input voltages constant.

6. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus is connected between the AC generating circuit and the AC circuit.

7. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus is connected between the rectifying circuit and the AC circuit.

8. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus has a first capacitor connected between the AC generating circuit and the AC circuit.

9. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus has a second capacitor connected between the rectifying circuit and the AC circuit.

10. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus has switch elements, which can be opened and closed, connected between the loads and the rectifying circuits, so that the switch elements can be opened and closed to select the loads to be power supplied from the plurality of loads.

11. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus is connected to an assembled battery in which cell modules composed of at least one cell are connected in series, wherein the cell modules are connected as portions of the loads, and the cell modules are charged.

12. The power supplying apparatus of claim 1, wherein:

the power supplying apparatus connected to the assembled battery in which cell modules composed of at least one cell are connected in series, wherein the cell modules are connected as portions of the loads, comprises;

switch elements to connect the cell modules and the rectifying circuits,

wherein the AC generating circuits are connected to the cell modules, so as to use the cell modules as power sources to generate AC voltages; and

the AC generating circuits are operated to discharge cell modules connected thereto, meanwhile the switch elements of other cell modules are closed so that DC voltages output from the rectifying circuits are applied to the cell modules connected thereto.

13. A power supplying apparatus for supplying power to a plurality of loads, comprising:

rectifying circuits connected to the plurality of loads respectively;

AC circuits to sequentially connect between the rectifying circuits; and

AC generating circuits to apply AC voltages to the AC circuits,

wherein the AC circuits comprise capacitors connected in series, frequencies of AC voltages generated by the AC generating circuits are variable in accordance with the transfer characteristics of the AC circuits formed between the AC generating circuits and the selected rectifying circuits.

14. A power supplying apparatus for independently adjusting charged amounts of cell modules of an assembled battery in which the cell modules composed of at least one cell are connected in series, comprising:

a plurality of control modules connected to positive and negative electrodes of the cell modules;

wherein each of the control modules comprises;

a positive terminal and a negative terminal connected to each of the cell modules;

an AC generating circuit which is connected to the positive terminal and the negative terminal and generates an AC voltage by using the cell module as a power source;

a rectifying circuit to rectify the AC voltage;

a control terminal which connects the output side of the AC generating circuit to the input side of the rectifying circuit and to which the AC voltage is applied; and

a switch element to connect or disconnect between at least one of the positive terminal and the negative terminal and the output terminal of the rectifying circuit;

wherein capacitors are connected between the control terminals of the adjacent control modules, and

the AC generating circuit in any one of the control modules is operated to discharge cell modules connected thereto, meanwhile the switch elements in other control modules are closed so that DC voltages output from the rectifying circuits are applied to the cell modules connected thereto.

15. The power supplying apparatus of claim 14, wherein:

the rectifying circuit outputs a DC voltage having a value larger than the peak-to-peak value of its input AC voltage.

16. The power supplying apparatus of claim 14, wherein:

the AC generating circuit generates an AC voltage having a peak-to-peak value larger than the value of the applied DC voltage.

17. The power supplying apparatus of claim 14, wherein:

the AC generating circuit generates a further AC voltage having phase inverted relative to the phase of the AC voltage;

the control module has further control terminal to output the further AC voltage;

the rectifying circuit performs full-wave rectification on the voltages applied on the control terminals and the further control terminals;

further capacitors are connected between the further control terminals of the adjacent control modules.

18. The power supplying apparatus of claim 14, wherein:

the AC generating circuit generates in-phase AC voltages;

the control module further comprises m−

1 control terminals to output the m-phase AC voltages together with the control terminal;

the rectifying circuit performs m-phase full-wave rectification on the m-phase voltages applied on the in control terminals;

m capacitors are connected between the in control terminals of the adjacent control modules.

19. The power supplying apparatus of claim 14, wherein:

the AC voltage generating circuit generates AC voltages having rectangular waveforms.

20. The power supplying apparatus of claim 14, wherein:

communication clock signals for performing serial communication between the control modules are supplied in a manner that the respective control modules are concatenated;

the communication clock signals function as the oscillating sources of the AC generating circuits.

21. The power supplying apparatus of claim 14, wherein:

communication clock signals for indicating the states of the control modules are supplied in a manner that the respective control modules are concatenated;

the communication clock signals function as the oscillating sources of the AC generating circuits.