# US 2014/0197799 A1 · Electrochemical Cell Or Battery With Reduced Impedance And Method For Producing Same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0197799 A1
- Document ID: US20140197799A1
- Status: Published application
- Kind: A1
- Application number: 14/156,563
- Filed: 2014-01-16
- Published: 2014-07-17
- Earliest claimed: 2013-01-16
- Assignees: Bathium Canada Inc.
- Applicants: Bathium Canada Inc.
- Inventors: Patrick Leblanc; Frederic Cotton; Thierry Guena; Cedric Reboul-Salze; Marc Deschamps; Thomas Calvez; Vincent Bodenez; Philippe Bernardo; Mathieu Dru
- Web page: https://patentgrep.com/patent/US20140197799A1

## CPC

- H02J 7/875: {Charging or discharging for charge maintenance, battery initiation or rejuvenation}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The invention disclosed is a method for decreasing the internal resistance or impedance of a battery or electrochemical cell is described which comprises the step of discharging the battery or cell until it reaches an overdischarge condition and maintaining the battery or cell in the overdischarge condition for a period of time sufficient to effect a diminution of the internal resistance or impedance of a battery or electrochemical cell; and a battery or electrochemical cell having a reduced impedance.

## Claims

### Claim 1

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell comprising the step of discharging the battery or electrochemical cell until it reaches an overdischarge condition and maintaining the battery or cell in the overdischarge condition for a period of time sufficient to effect a diminution of the internal resistance or impedance of a battery or electrochemical cell.

### Claim 2 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell as defined in claim 1 wherein the battery or cell is maintained in an overdischarge condition until the battery or electrochemical cell reaches between 102% and 140% of its rated discharge capacity.

### Claim 3 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell as defined in claim 1 wherein the battery or cell is maintain in an overdischarge condition until the battery or electrochemical cell reaches between 108% and 120% of its rated discharge capacity.

### Claim 4 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell as defined in claim 1, wherein the battery or cell comprises at least one anode and at least one cathode and wherein the least one cathode is electrochemically reduced through a forced overdischarge to effect the diminution of internal resistance or impedance.

### Claim 5 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell as defined in claim 1, wherein the step of discharging the battery or electrochemical cell until it reaches the overdischarge condition is performed when the battery or electrochemical cell is new.

### Claim 6 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery or electrochemical cell as defined in claim 1, wherein multiple discharges reaching the overdischarge condition of short periods of time are done which add up to the period of time sufficient to effect a diminution of the internal resistance or impedance.

### Claim 7 (depends on 1)

A method for decreasing the internal resistance or impedance of a battery as defined in claim 1, wherein the battery is floated at a floating voltage until all the electrochemical cells of the battery reach the same voltage prior to discharging the battery until it reaches the overdischarge condition.

### Claim 8

A battery or electrochemical cell having an internal resistance or impedance reduced by a process of discharging the battery or electrochemical cell until it reaches an overdischarge condition and maintaining the battery or cell in the overdischarge condition for a period of time sufficient to effect a diminution of the internal resistance or impedance of a battery or electrochemical cell.