# US 7,612,523 B2 · Method of recovering voltage of a primary cell and its device

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- Number: US 7,612,523 B2
- Document ID: US7612523B2
- Status: Granted
- Kind: B2
- Application number: 11/782,947
- Filed: 2007-07-25
- Published: 2008-02-21
- Granted: 2009-11-03
- Earliest claimed: 2006-08-15
- Assignees: Promore Environment & Energy Co., Ltd.
- Inventors: Chu-Tsai Li
- Web page: https://patentgrep.com/patent/US7612523B2

## CPC

- H02J 7/875: {Charging or discharging for charge maintenance, battery initiation or rejuvenation}
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

A method of recovering voltage of a primary cell and its device. The method of steps of reading a cell to obtain start voltage, capacitance and number of the cells to be recovered, of imposing sine curve impulse once every 1-3 second on the positive pole of the cell(s) for stimulating chemical substance in the cell(s), of imposing sine curve impulse once every 5-7 seconds when the voltage recovery reaches 70%, of imposing sine curve impulse once every 10-12 seconds when the voltage recovery reaches more than 90%, and of changing sine curve impulse into a small stream of impulse when the voltage recovery reaches more than 99% for stabilizing the chemical substance in the cell(s). The device includes a reading circuit, a stimulating circuit, a control circuit, a control circuit and a voltage transforming and rectifying circuit.

## Claims

### Claim 1

A device for recovering voltage of a primary cell, said device comprising:
a reading circuit connected to two poles of a cell, for obtaining a start voltage and capacitance said cell;
a control circuit for receiving data from said reading circuit;
a stimulating circuit for receiving data from said control circuit, for imposing a sine curve impulse on a positive pole of said cell to excite a chemical substance in said cell and recover the voltage in said cell to a standard voltage; and
a voltage changing and rectifying circuit for receiving data from said control circuit and to adjust a level of voltage inputted in said stimulating circuit,
wherein said stimulating circuit imposes sine curve impulse once every 1-3 seconds for stimulating said chemical substance in said cell;
imposing said sine curve impulse once every 5-7 seconds when the voltage read from said cell has recovered a difference of said start voltage from standard voltage for more than 70%.
imposing said sine curve impulse once every 10-12 seconds when the voltage read from said cell has recovered a difference of said start voltage from said standard voltage for more than 90%; and,
changing said sine curve impulse into a small stream of impulse for stabilizing said chemical substance in said cell when the voltage read from said cell has recovered a difference of said start voltage from said standard voltage for more than 99%.

### Claim 2 (depends on 1)

The device as claimed in claim 1, wherein said sine curve impulse has a level 0.5V-1, 5V higher than a standard voltage of said cell.

### Claim 3 (depends on 1)

The device as claimed in claim 1, wherein said reading circuit is further connected to a temperature control circuit connected to said two poles of said cell, for measuring temperature of said cell during a period of stimulating process.

### Claim 4 (depends on 1)

The device as claimed in claim 1, wherein a power source of said voltage transforming and rectifying circuit is an AC power passing through an AC-DC converter of said voltage transforming and rectifying circuit.

### Claim 5 (depends on 1)

The device as claimed in claim 1, wherein a power source of said voltage transforming and rectifying circuit is a DC power passing through a DC-DC converter of said voltage transforming and rectifying circuit.

### Claim 6

A method of recovering voltage of a primary cell, said method comprising:
(1) a first step of reading a primary cell, for obtaining a start voltage and a capacitance of the cell to be recovered;
(2) a second step of imposing a sine curve impulse once every 1-3 seconds on a positive pole of said cell after the reading of said cell, in order to stimulate chemical substance in said cell;
(3) a third step of imposing a sine curve impulse once every 5-7 seconds when a read of a start voltage from said cell has recovered a difference from a standard voltage for more than 70%;
(4) a fourth step of imposing a sine curve impulse once every 10-12 seconds when a read of a start voltage from said cell has recovered a difference from the standard voltage for more than 90%; and
(5) a fifth step of changing a sine curve impulse into a small stream of impulse for stabilizing said chemical substance in said cell when a read of a start voltage from said cell has recovered a difference from the standard voltage for more than 99%.

### Claim 7 (depends on 6)

The method of recovering voltage of a primary cell as claimed in claim 6, wherein a level of said sine curve impulse of the fifth step is 0.5V-1.5V higher than standard voltage of said cell.

### Claim 8 (depends on 6)

The method of recovering voltage of a primary cell as claimed in claim 6, wherein testing and reading are carried out during a period of non-sine curve impulse.