Distributed cell formation systems for lithium containing secondary batteries

Patent metadata

Field	Value
Publication number	US-11616258-B2
Application number	US-202217851955-A
Country	US
Kind code	B2
Filing date	Jun 28, 2022
Priority date	Jun 30, 2021
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A cell formation system for lithium containing secondary batteries includes a population of formation clusters, each formation cluster includes a connector configured for connecting to a lithium containing secondary battery, a charging module connected to the connector and configured to charge the battery, a pre-lithiation module connected to the connector and configured to diffuse lithium to electrode active material layers of the battery, a discharging module connected to the connector and configured to discharge the battery, and a communication interface for communicatively coupling the formation cluster to a central controller. In response to received instructions from the central controller, the formation cluster is configured to charge the battery using the charging module, diffuse lithium to the electrode active material layers of the battery using the pre-lithiation module, and discharge the secondary battery using the discharging module after lithium has been diffused to the electrode active material layers of the battery.

First claim

What is claimed is:

1. A cell formation system for lithium containing secondary batteries, each lithium containing secondary battery comprising a population of bilayers, an electrode busbar, and a counter-electrode busbar, wherein each bilayer of the population of bilayers comprises an electrode structure, a separator structure, and a counter-electrode structure, the electrode structure of each member of the bilayer population comprises an electrode current collector and an electrode active material layer, and the counter-electrode structure of each member of the bilayer population comprises a counter-electrode current collector and a counter-electrode active material layer, the cell formation system comprising:
a population of formation clusters, each formation cluster of the population of formation clusters including:
a connector configured for connecting to a lithium containing secondary battery;
a charging module connected to the connector and configured to charge the lithium containing secondary battery connected to the connector;
a pre-lithiation module connected to the connector and configured to diffuse lithium to the electrode active material layers of the lithium containing secondary battery connected to the connector;
a discharging module connected to the connector and configured to discharge the lithium containing secondary battery connected to the connector; and
a communication interface for communicatively coupling the formation cluster to a central controller, wherein in response to received instructions from the central controller, the formation cluster is configured to:
charge the lithium containing secondary battery connected to the connector using the charging module;
diffuse lithium to the electrode active material layers of the lithium containing secondary battery using the pre-lithiation module after the lithium containing secondary battery has been charged; and
discharge the lithium containing secondary battery using the discharging module after lithium has been diffused to the electrode active material layers of the lithium containing secondary battery using the pre-lithiation module.

2. The cell formation system of claim 1 , wherein the central controller comprises a processor, a memory, and a controller communication interface for communicatively coupling the central controller to the population of formation clusters, wherein the central controller is programmed by instructions stored in the memory and executed by the processor to provide instructions to the population of formation clusters.

3. The cell formation system of claim 1 , wherein each formation cluster further comprises a power connection configured for connection to a power source, wherein the power connection is coupled to the charging module, the pre-lithiation module, and the discharging module.

4. The cell formation system of claim 1 , wherein each formation cluster further comprises a formation cluster controller including a processor and a memory, wherein the formation cluster controller is programmed by instructions stored in the memory and executed by the processor to control the charging module, the pre-lithiation module, and the discharging module in response to the received instructions from the central controller.

5. The cell formation system of claim 4 , wherein the formation cluster controller comprises a microcontroller.

6. The cell formation system of claim 4 , wherein each formation cluster further comprises at least one sensor, wherein the formation cluster controller is programmed receive a signal output by the at least one sensor and to transmit the received signal output to the central controller using the communication interface, and wherein the at least one sensor comprises a temperature sensor, a voltage sensor, or a current sensor.

7. The cell formation system of claim 1 , wherein the charging module, the pre-lithiation module, and the discharging module of each formation cluster each further comprises a module controller including a processor and a memory, wherein each module controller is programmed by instructions stored in the memory and executed by the processor to control its associated one of the charging module, the pre-lithiation module, and the discharging module in response to the received instructions from the central controller.

8. The cell formation system of claim 7 , wherein the module controllers comprise microcontrollers.

9. The cell formation system of claim 7 , wherein each formation cluster further comprises at least one sensor, wherein at least one of the module controllers is programmed receive a signal output by the at least one sensor and to transmit the received signal output to the central controller using the communication interface.

10. The cell formation system of claim 9 , wherein the at least one sensor comprises a temperature sensor, a voltage sensor, or a current sensor.

11. The cell formation system of claim 1 , further comprising a housing supporting the population of formation clusters.

12. The cell formation system of claim 1 , further comprising a communication network connected to the communication interface of each formation cluster of the population of formation clusters.

13. The cell formation system of claim 1 , wherein the communication interface of each formation cluster of the population of formation clusters comprises a wireless communication interface.

14. The cell formation system of claim 1 , further comprising a population of additional formation clusters, each additional formation cluster of the population of additional formation clusters including:
a connector configured for connection to a lithium containing secondary battery;
a charging module connected to the connector and configured to charge a lithium containing secondary battery connected to the connector;
a pre-lithiation module connected to the connector and configured to diffuse lithium to the electrode active material layers of a lithium containing secondary battery connected to the connector;
a discharging module connected to the connector and configured to discharge a lithium containing secondary battery connected to the connector; and
a communication interface for communicatively coupling the formation cluster to the central controller, wherein in response to received instructions from the central controller, the formation cluster is configured to:
charge a lithium containing secondary battery connected to the connector using the charging module;
diffuse lithium to the electrode active material layers of the lithium containing secondary battery using the pre-lithiation module after the lithium containing secondary battery has been charged; and
discharge the lithium containing secondary battery using the discharging module after lithium has been diffused to the electrode active material layers of the lithium containing secondary battery using the pre-lithiation module.

15. The cell formation system of claim 14 , further comprising an additional housing supporting the population of additional formation clusters.

Assignees

• Enovix Operations Inc
• Enovix Corp

Inventors

• Fosler Ross M

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M10/486

  for measuring temperature · CPC title

• H01M10/441 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/46

  Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) · CPC title