Longitudinal constraints for energy storage devices

Patent metadata

Field	Value
Publication number	US-2024170714-A1
Application number	US-202318531197-A
Country	US
Kind code	A1
Filing date	Dec 6, 2023
Priority date	May 14, 2015
Publication date	May 23, 2024
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

1 .- 63 . (canceled)

64 . A sealed secondary battery for cycling between a charged state and a discharged state, the sealed secondary battery comprising an enclosure that seals the contents of the secondary battery, an electrode assembly and a non-aqueous liquid electrolyte within the enclosure, and a constraint within the enclosure that maintains a pressure on the electrode assembly as the sealed secondary battery 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 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, 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.

65 . The secondary battery of claim 64 , wherein the electrically insulating separator material comprises an electrically insulating microporous separator material.

66 . The secondary battery of claim 64 , wherein a combined surface area of the first and second longitudinal end surfaces is less than 33% of a combined surface area of the lateral surface and the first and second longitudinal end surfaces.

67 . The secondary battery of claim 64 , wherein a projection of the members of the electrode population and the counter-electrode populations onto the first longitudinal surface circumscribes a first projected area and a projection of the members of the electrode population and the counter-electrode populations onto the second longitudinal surface circumscribes a second projected area, and wherein the constraint imposes an average compressive force to each of the first and second projected areas of at least 0.7 kPa, averaged over the surface area of the first and second projected areas, respectively.

68 . The secondary battery of claim 67 , wherein the constraint imposes an average compressive force to each of the first and second projected areas of at least 2.8 kPa, averaged over the surface area of the first and second projected areas, respectively.

69 . The secondary battery of claim 67 , wherein the constraint imposes an average compressive force to each of the first and second projected areas of at least 5.25 kPa, averaged over the surface area of the first and second projected areas, respectively.

70 . The secondary battery of claim 67 , wherein constraint imposes an average compressive force to each of the first and second projected areas of at least 8.75 kPa, averaged over the surface area of the first and second projected areas, respectively.

71 . The secondary battery of claim 64 , wherein the constraint and enclosure have a combined volume that is less than 60% of the volume enclosed by the enclosure.

72 . The secondary battery of claim 64 , wherein the constraint and enclosure have a combined volume that is less than 30% of the volume enclosed by the enclosure.

73 . The secondary battery of claim 64 , wherein the microporous separator material comprises a particulate material and a binder, has a void fraction of at least 20 vol. %, and is permeated by the non-aqueous liquid electrolyte.

74 . The secondary battery of claim 64 , wherein the distance between the at least one tension member and the lateral surface is less than 50% of the smallest Feret diameter of the electrode assembly, with the Feret diameter being measured in the same direction as the distance between the at least one tension member and the lateral surface of the electrode assembly.

75 . The secondary battery of claim 64 , wherein the distance between the at least one tension member and the lateral surface is less than 30% of the smallest Feret diameter of the electrode assembly, with the Feret diameter being measured in the same direction as the distance between the at least one tension member and the lateral surface of the electrode assembly.

76 . The secondary battery of claim 64 , wherein the electrode structures comprise an anodically active electroactive material and the counter-electrode structures comprise a cathodically active electroactive material.

77 . The secondary battery of claim 64 , wherein the secondary battery comprises a set of at least two electrode assemblies and the constraint maintains a pressure on the electrode assemblies within the set as the secondary battery is cycled between the charged and the discharged states.

78 . The secondary battery of claim 64 , wherein the electrode assembly comprises at least 5 electrode structures and at least 5 counter-electrode structures.

79 . The secondary battery of claim 64 , wherein the constraint comprises a material having an ultimate tensile strength of at least 10,000 psi (>70 MPa).

80 . The secondary battery of claim 64 , wherein the constraint comprises metal, metal alloy, ceramic, glass, plastic, or a combination thereof.

81 . The secondary battery of claim 64 , wherein the constraint comprises a sheet of material having a thickness in the range of about 10 to about 100 micrometers.

82 . The secondary battery of claim 64 , wherein the compression members exert a pressure on the first and second longitudinal end surfaces that exceeds the pressure maintained on the electrode assembly in each of two directions that are mutually perpendicular and perpendicular to the stacking direction by a factor of at least 3.

83 . The secondary battery of claim 64 , wherein the compression members exert a pressure on the first and second longitudinal end surfaces that exceeds the pressure maintained on the electrode assembly in each of two directions that are mutually perpendicular and perpendicular to the stacking direction by a factor of at least 4.

Assignees

• Enovix Corp

Inventors

• Busacca Robert S
• Lahiri Ashok
• Ramasubramanian Murali S
• 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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M50/426

  Fluorocarbon polymers · CPC title

• H01M50/417

  Polyolefins · CPC title

• H01M50/446

  Composite material consisting of a mixture of organic and inorganic materials · CPC title