Battery device, battery management method, and electronic apparatus
The present technique relates to a battery device, a battery management method, and an electronic apparatus that can easily manage a battery device formed with a large number of battery cells. When a battery ( 51 ) has capacitive properties (or when the equivalent circuit of the battery ( 51 ) for an AC signal at a frequency f is a capacitor ( 51 C)), a series circuit formed with a capacitor ( 171 ) and a coil ( 172 ) (=a coil ( 172 - 1 )+a coil ( 172 - 2 )) is provided in parallel to the battery ( 51 ), to form a blocking filter. The capacitor ( 171 ) and the coil ( 172 - 1 ) form a series resonance circuit. The capacitor ( 51 C) and the coil ( 172 - 2 ) form a parallel resonance circuit. The present invention can be applied to an electronic apparatus that includes a large number of battery cells, for example.
1. A battery device, comprising:
at least one battery cell including:
a battery element configured to output DC power via a power line;
an integrated circuit (IC) chip connected in parallel to the battery element,
wherein the IC chip is configured to:
store identification information of the at least one battery cell;
receive an AC signal via the power line;
generate electric power based on load modulation of the AC signal; and
output the identification information of the at least one battery cell based on the electric power; and
a blocking filter, connected in parallel to the battery element, wherein the blocking filter is configured to block input of the AC signal to the battery element.
2. The battery device according to claim 1 , wherein
an equivalent circuit of the battery element for the AC signal is a first capacitor which has a capacitance C 1 , and
the blocking filter comprises a series circuit of a second capacitor which has a capacitance C 2 and a first coil which has an inductance L 1 .
3. The battery device according to claim 2 , further comprising:
a series resonance circuit and a parallel resonance circuit,
wherein the first coil comprises a series connection of a second coil which has an inductance L 11 and a third coil which has an inductance L 12 ,
wherein the series resonance circuit comprises the second capacitor and the second coil,
wherein the series resonance circuit satisfies 2πf=1/√(C 2 ·L 11 ), and
wherein the parallel resonance circuit comprises the first capacitor and the third coil,
wherein the parallel resonance circuit satisfies 2πf=1/√(C 1 ·L 12 ), and
wherein f is a frequency of the AC signal.
4. The battery device according to claim 1 , wherein
an equivalent circuit of the battery element for the AC signal is a first coil which has an inductance L 1 , and
the blocking filter comprises a first capacitor which has a capacitance C 1 .
5. The battery device according to claim 4 , further comprising:
a parallel resonance circuit comprising the first coil and the first capacitor,
wherein the parallel resonance circuit satisfies 2πf=1/√(L 1 ·C 1 ), and
wherein f is a frequency of the AC signal.
6. A battery management method, comprising:
in at least one battery cell that includes, a battery element, an integrated circuit (IC) chip connected in parallel to the battery element, and a blocking filter:
outputting DC power from the battery element via a power line;
storing, by the IC chip, identification information of the at least one battery cell;
receiving, by the IC chip, an AC signal via the power line;
generating, by the IC chip, electric power based on load modulation of the AC signal;
outputting, by the IC chip, the identification information of the battery cell, based on the electric power; and
blocking, by the blocking filter, an input of the AC signal to the battery element.
7. An electronic apparatus, comprising:
a battery device comprising at least one battery cell, wherein the battery cell includes:
a battery element configured to output DC power via a power line;
an integrated circuit (IC) chip connected in parallel to the battery element,
wherein the IC chip is configured to:
store identification information of the at least one battery cell;
receive an AC signal via the power line;
generate electric power based on load modulation of the AC signal; and
output the identification information of the at least one battery cell based on the electric power; and
a blocking filter connected in parallel to the battery element, wherein the blocking filter is configured to block the AC signal to the battery element;
an operating unit configured to operate by the DC power from the battery device; and
a management device configured to:
acquire the identification information of the at least one battery cell based on communication of the AC signal to and from the IC chip via the power line; and
control the DC power from the battery device to the operating unit, based on the identification information of the at least one battery cell.
8. The battery device according to claim 1 , further comprising a DC blocking unit configured to block input of the DC power to the IC chip.
9. The battery device according to claim 1 , wherein the identification information comprises authentication information of the at least one battery cell.
10. The battery device according to claim 1 , further comprising a parallel resonance circuit that includes the blocking filter and the battery element.
11. The battery device according to claim 10 , wherein the battery element in the parallel resonance circuit is a capacitive battery.
12. A battery device, comprising:
at least one battery cell including:
a battery element configured to output DC power via a power line,
wherein an equivalent circuit of the battery element for an AC signal is a first capacitor having a capacitance C 1 ;
an integrated circuit (IC) chip connected in parallel to the battery element,
wherein the IC chip is configured to:
store identification information of the at least one battery cell;
receive the AC signal via the power line;
generate electric power based on load modulation of the AC signal; and
output the identification information of the at least one battery cell based on the electric power; and
a blocking filter, connected in parallel to the battery element,
wherein the blocking filter comprises a series circuit of a second capacitor having a capacitance C 2 and a first coil having an inductance L 1 , and
wherein the blocking filter is configured to block input of the AC signal to the battery element.