# US 12,002,621 B2 · Electrochemical cells for high discharge

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- Number: US 12,002,621 B2
- Document ID: US12002621B2
- Status: Granted
- Kind: B2
- Application number: 18/137,570
- Filed: 2023-04-21
- Published: 2023-08-10
- Granted: 2024-06-04
- Earliest claimed: 2016-05-19
- Assignees: Battarix Enterprises, LLC
- Applicants: Battarix Enterprises, LLC
- Inventors: Nir Kapelushnik
- Web page: https://patentgrep.com/patent/US12002621B2

## CPC

- H01G 11/26: characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G 11/50: specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
- H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
- H01G 11/70: characterised by their structure
- H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/502: {for non-aqueous cells (H01M4/505 takes precedence)}
- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/052: Li-accumulators
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 10/658: by thermal insulation or shielding
- H02J 7/90: Regulation of charging or discharging current or voltage
- H01G 11/46: Metal oxides
- H01G 11/56: Solid electrolytes, e.g. gels; Additives therein
- H01G 11/72: specially adapted for integration in multiple or stacked hybrid or EDL capacitors
- H01M 2010/4292: {Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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

Provided herein is an electrochemical cell designed for high current discharge, which includes a cathode strip, an anode strip, and at least two separator strips, being longitudinally stacked to form an electrodes set that is folded into at least four segments and designed to exhibit a ratio of its nominal capacity per its active area lower than 12 mAh/cm2, such that the cell is characterized by a discharge efficiency at room temperature of at least 30% to a cut-off voltage of ⅔ of its original voltage at a discharge current of 1,250 m A. Also provided are process of manufacturing, and uses of the cell, which is particularly useful in high drain-rate applications as charging a cellular phone.

## Claims

### Claim 1

A method of forming an electrochemical cell, the method comprising providing a cathode having a cathode geometric volume and a cathode active area; providing an anode having an anode geometric volume and an anode active area;
providing at least two separators;
arranging at least one of said separators at least between the cathode active area and the anode active area; and
folding the anode and the cathode to form at least four segments, wherein a ratio of a nominal capacity of the cell to said active area is lower than 12 mAh/cm2;
a ratio of at least one of the anode geometric volume and the cathode geometric volume to the anode active area and the cathode active area, respectively, is less than 195.5×10−6 cm.

### Claim 2 (depends on 1)

The method of claim 1, wherein a ratio mass equivalent of said anode to said cathode ranges from 1.5 to 0.9.

### Claim 3 (depends on 1)

The method of claim 1, wherein a thickness of said cathode is less than 200+/−5 microns.

### Claim 4 (depends on 1)

The method of claim 1, wherein a width of said anode or said cathode ranges from 60 mm to 20 mm.

### Claim 5 (depends on 1)

The method of claim 1, wherein folding the anode and the cathode to form at least four segments comprises folding the anode and cathode into a flattened jellyroll configuration.

### Claim 6 (depends on 1)

The method of claim 1, wherein each of said segments is substantially rectangular.

### Claim 7 (depends on 1)

The method claim 1, further comprising folding at least one of said anode or cathode into at least 5 segments.

### Claim 8 (depends on 1)

The method of claim 1, wherein said nominal capacity of the cell is 775+/−25 mAh.

### Claim 9 (depends on 1)

The method of claim 1, further comprising encasing the cell in a sealed container.

### Claim 10 (depends on 9)

The method of claim 9, wherein said container is heat insulating.

### Claim 11 (depends on 1)

The method of claim 1, wherein an anode active material comprises at least one of lithium, aluminum, silicon, carbon, zinc, and alloys and/or combinations thereof.

### Claim 12 (depends on 1)

The method of claim 1, wherein a cathode active material comprises at least one of MnO2, FeS2, CoO2, NiMnCoO2, FePO4, NiCoAlO2, Ti5Oi2, CFX (mono fluorinated carbon), and alloys, and/or combinations thereof.

### Claim 13 (depends on 1)

The method of claim 1, wherein the ratio of a nominal capacity of the cell to said active area ranges from 12 mAh/cm2 to 5 mAh/cm2.

### Claim 14 (depends on 1)

The method of claim 1, wherein the cell is characterized by a discharge efficiency at room temperature of at least 30% to a cut-off voltage of ⅔ of an original voltage at a discharge current of 1,250 m A.

### Claim 15 (depends on 1)

The method of claim 1, wherein folding the anode and the cathode to form at least four segments comprises folding said anode into at least 4 segments, folding said cathode into fewer segments than the anode, and an inner segment consists of an anode segment.

### Claim 16 (depends on 4)

The method of claim 4, wherein a length of said cathode is at least 110+/−2 mm.

### Claim 17 (depends on 1)

The method of claim 1, wherein a thickness of said anode is 130+/−5 microns or less.

### Claim 18 (depends on 1)

The method of claim 1, wherein an anode active material comprises lithium.

### Claim 19 (depends on 1)

The method of claim 1, wherein a cathode active material comprises MnO2.

### Claim 20 (depends on 1)

The method of claim 1, further comprising conductively connecting at least two contact terminals with each of said anode and said cathode, respectively.