Longitudinal constraints for energy storage devices

Patent metadata

Field	Value
Publication number	US-2018145367-A1
Application number	US-201615572722-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 14, 2015
Publication date	May 24, 2018
Grant date	—

Abstract

A energy storage device for cycling between a charged state and a discharged state, the energy storage device including an enclosure, an electrode assembly and a non-aqueous liquid electrolyte within the enclosure, and a constraint that maintains a pressure on the electrode assembly as the energy storage device is cycled between the charged and the discharged states.

First claim

What is claimed is:

1 . An energy storage device for cycling between a charged state and a discharged state, the energy storage device comprising an enclosure, an electrode assembly and a non-aqueous liquid electrolyte within the enclosure, and a constraint that maintains a pressure on the electrode assembly as the energy storage device is cycled between the charged and the discharged states, the electrode assembly comprising a population of electrode structures, a population of counter-electrode structures and an electrically insulating microporous separator material between members of the electrode and counter-electrode populations wherein
the electrode assembly has opposing first and second longitudinal end surfaces separated along a longitudinal axis, and a lateral surface surrounding the longitudinal axis and connecting the first and second longitudinal end surfaces, a combined surface area of the first and second longitudinal end surfaces being less than 33% of a combined surface area of the lateral surface and the first and second longitudinal end surfaces, members of the electrode population and members of the counter-electrode population are arranged in an alternating sequence in a stacking direction that parallels the longitudinal axis within the electrode assembly, the constraint comprises first and second compression members connected by at least one tension member that pulls the compression members toward each other, and the constraint maintains a pressure on the electrode assembly in the stacking direction that exceeds the pressure maintained on the electrode assembly in each of two directions that are mutually perpendicular and perpendicular to the stacking direction.

2 . The energy storage device of claim 1 , wherein the energy storage device is a secondary battery.

3 . The energy storage device of claim 1 , wherein the constraint comprises first and second compression members that overly the longitudinal end surfaces of the electrode assembly.

4 . The energy storage device of any preceding claim, wherein the constraint comprises at least one compression member that is internal to the longitudinal end surfaces.

5 - 63 . (canceled)

Assignees

• Enovix Corp

Inventors

• Busacca Robert S
• Lahiri Ashok
• Ramasubramanian Murali
• Valdes Bruno A
• Dales Gardner Cameron
• Spindt Christopher J
• Ho Geoffrey Matthew
• Rust Iii Harrold J
• Wilcox James D
• Varni John F
• Lee Kim Han
• Shah Nirav S
• Contreras Richard J
• Van Erden Lynn
• Matsubayashi Ken S
• Dalton Jeremie J

Classifications

• H01M50/497

  Ionic conductivity · CPC title

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/426

  Fluorocarbon polymers · CPC title

• H01M50/417

  Polyolefins · CPC title