# US 2019/0245482 A1 · Photovoltaic device

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- Number: US 2019/0245482 A1
- Document ID: US20190245482A1
- Status: Published application
- Kind: A1
- Application number: 16/309,834
- Filed: 2016-10-20
- Published: 2019-08-08
- Earliest claimed: 2016-09-09
- Inventors: Doo Ill KIM
- Web page: https://patentgrep.com/patent/US20190245482A1

## CPC

- H02S 40/38: Energy storage means, e.g. batteries, structurally associated with PV modules
- G01R 19/165: Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R 22/06: by electronic methods
- G01R 31/40: Testing power supplies (testing photovoltaic devices H02S50/10)
- H02J 7/35: with light sensitive cells
- H02M 7/48: using discharge tubes with control electrode or semiconductor devices with control electrode
- H02S 50/00: Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H10F 77/42: directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
- H10F 77/484: {Refractive light-concentrating means, e.g. lenses}
- Y02E 10/50: Photovoltaic [PV] energy
- Y02E 10/52: PV systems with concentrators
- Y02E 10/56: Power conversion systems, e.g. maximum power point trackers
- Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a photovoltaic device comprising: light concentration unit for concentrating incident solar energy; a solar cell module converting the concentrated solar energy into electrical energy and outputting direct current (DC) power; a light amount detection unit for detecting the light amount of the solar energy; a battery module charged by receiving the DC power; a power detection unit for detecting the DC power; a first comparator comparing the DC power with a charged voltage of the battery module and outputting a first comparison result signal; a second comparator, which compares the detected light amount of the solar energy with reference light amount data indicating the light amount sufficient enough to be converted into electrical energy and outputs a second comparison result signal; a third comparator comparing the charged voltage of the battery module with overdischarge reference voltage data and outputting a third comparison result signal; a fourth comparator comparing the charged voltage of the battery module with overcharge reference voltage data and outputting a fourth comparison result signal; an auxiliary power generation unit, which operates when the light amount of the solar energy is less than the reference light amount data, rotates an AC motor or a DC motor by means of the DC power, decelerates or accelerates the number of revolutions of motive power, and generates and outputs auxiliary electrical energy; a distribution controller for controlling the supply and cut-off of the DC power from the solar cell module to the battery module; and an AC output driver converting charged power of the battery module or the DC power from the solar cell module into AC power having a frequency of 400 Hz to 1200 Hz and outputting the AC power to a load.

## Claims

### Claim 1

A photovoltaic device compromising:
a light concentration unit for concentrating incident solar energy;
a solar cell module converting the solar energy concentrated in the light concentration unit into electrical energy and outputting direct current (DC) power;
a light amount detection unit for detecting a light amount of the solar energy;
a battery module charged by receiving the DC power from the solar cell module;
a power detection unit for detecting the DC from the solar cell module;
a first comparator comparing the DC power from the solar cell module detected by the power detection unit with a charged voltage of the battery module, and outputting a first comparison result signal;
a second comparator comparing a light amount of the solar energy detected by the light amount detection unit with reference light amount data indicating a light amount enough to be converted into the electrical energy, and outputting a second comparison result signal;
a third comparator comparing the charged voltage of the battery module with over-discharge reference voltage data, and outputting a third comparison result signal;
a fourth comparator comparing a charged voltage of the battery module with over-charge reference voltage data and outputting a fourth comparison result signal;
an auxiliary power generation unit, which operates when a light amount of the solar energy is less than the reference light amount data, rotates an AC motor or a DC motor by means of the DC power, decelerates or accelerates the number of revolutions of motive power, and generates and outputs auxiliary electrical energy;
a distribution controller for controlling the supply and cut-off of the DC power from the solar cell module to the battery module according to the first, second, third and fourth comparison result signals; and
an AC output driver converting charged power of the battery or the DC power from the solar cell module into alternating current (AC) power having a frequency of 400 Hz to 1200 Hz and outputting the AC power to a load.

### Claim 2

The photovoltaic device according to claim wherein when the detected DC power is higher than a charged voltage of the battery module, the distribution controller controls the supply of the DC power from the solar cell module to the battery module, and
when the detected DC power is lower than or equal to a charged voltage of the battery module, the distribution controller controls the cut-off of the DC power from the solar cell module to the battery module.

### Claim 3 (depends on 1)

The photovoltaic device according to claim 1, wherein when the detected light amount of the solar energy is more than equal to the light amount data, the distribution controller controls the supply of the DC power from the solar cell module to the battery module, and
when the detected light amount of the solar energy is less than the reference light amount data, the distribution controller controls the cut-off of the DC power from the solar cell module to the battery module.

### Claim 4 (depends on 1)

The photovoltaic device according to claim 1, wherein when the charged voltage of the battery module is lower than or equal to the over-discharge reference voltage data, the distribution controller controls the supply of the DC power from the solar cell module to the battery module, and
when the charged voltage of the battery module is less than the over-discharge reference voltage data, the distribution controller controls the cut-off of the DC power from the solar cell module to the battery module.

### Claim 5

The photovoltaic device according to claim I wherein when a charged voltage of the battery module is less than the over-charge reference voltage data, the distribution controller controls the supply of the DC power to the battery module, and
when a charged voltage of the battery module is more than or equal to the over-charge reference voltage data, the distribution controller controls the cut-off of the DC power to the battery module.

### Claim 6 (depends on 1)

The photovoltaic device according to claim 1, wherein the photovoltaic device further comprises a memory that stores the reference light amount data, the over-discharge reference voltage data, and the over-charge reference voltage data.