# US 12,191,453 B2 · Lithium-ion battery formation process

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- Number: US 12,191,453 B2
- Document ID: US12191453B2
- Status: Granted
- Kind: B2
- Application number: 18/184,974
- Filed: 2023-03-16
- Published: 2023-07-13
- Granted: 2025-01-07
- Earliest claimed: 2020-11-16
- Assignees: Ford Global Technologies, LLC
- Applicants: Ford Global Technologies, LLC
- Inventors: Kent Snyder; Minghong Liu
- Web page: https://patentgrep.com/patent/US12191453B2

## CPC

- H01M 10/058: Construction or manufacture
- H01M 4/0447: {of complete cells or cells stacks}
- H01M 10/049: {Processes for forming or storing electrodes in the battery container}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H01M 10/446: {Initial charging measures}
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/105: Pouches or flexible bags
- H01M 50/609: Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M 50/636: Closing or sealing filling ports, e.g. using lids
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL 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

A method of producing a lithium-ion battery includes filling at least one cell of the battery with an electrolyte followed directly with a first step of sealing the at least one cell and a second step of applying pulsating compression to the at least one cell during formation charging, the pulsating compression comprising alternating a first time period of applying a first compression force F1 greater than zero and a second time period of applying a second compression force F2, wherein F1>F2, and the formation charging includes a first charge of the battery.

## Claims

### Claim 1

A method of producing a lithium-ion battery, comprising:
filling at least one cell of the battery with an electrolyte followed directly by sealing the at least one cell and then applying pulsating compression to the at least one cell during formation charging, the pulsating compression comprising alternating repetitions between applying a first compression force greater than zero for a first time period and applying a second compression force lower than the first compression force for a second time period, and the formation charging including a first charge of the battery.

### Claim 2 (depends on 1)

The method of claim 1, wherein application of the pulsating compression and formation charging are simultaneous.

### Claim 3 (depends on 1)

The method of claim 1, wherein the method is free of cell soaking prior to the sealing of the cell.

### Claim 4 (depends on 1)

The method of claim 1, wherein the at least one cell includes a plurality of cells stacked in an array.

### Claim 5 (depends on 1)

The method of claim 1, wherein the at least one cell includes a plurality of components, the method further comprising wetting of the plurality of components with the electrolyte during the pulsating compression.

### Claim 6 (depends on 1)

The method of claim 1, wherein the pulsating compression is applied for an entire duration of the formation charging.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first and second time periods have a same length.