Enovix Corporation

Enovix Operations Inc.

Gardner Cameron Dales

Murali Ramasubramanian

Robert S Busacca

John F Varni

Bruno A Valdes

Ashok Lahiri

Harrold Jones Rust, Iii

Nirav S Shah

Kim Han Lee

Richard J Contreras

Christopher J Spindt

James D Wilcox

Lynn Van Erden

Geoffrey Matthew Ho

Jeremie James Dalton

Ken S Matsubayashi

Jason N Howard

Robert Keith Rosen

Kim Lester Fortunati

Michael J Armstrong

Anthony Calcaterra

Neelam Singh

Jeffrey Glenn Buck

Jonathan C Doan

Joshua David Winans

Thomas John Schuerlein

Neal Sarswat

Vladimir K Dioumaev

Benjamin L Cardozo

Robert F Kinchen

Benjamin J Cardozo

Gunther A Koblmiller

An apparatus for merging webs for the production of an electrode assembly for a secondary battery includes first and second webs of base material wound on a first spool and a second spool, respectively. The apparatus also includes first and second rotating assemblies configured to move the first and second webs of base material along a first web merge path and a second web merge path, respectively. The first and second rotating assemblies are configured to control a tension of the respective web of base material in a down web direction along a portion of the respective web merge path located between the respective spool and rotating assembly. The apparatus also includes a receiving member configured to receive the first and second webs of base material at first and second web merge locations, respectively, such that the second web of base material overlays the first web of base material.

Apparatus including rotating assemblies to move webs along merge paths and receiving member to overlay webs, and methods for the production of electrodes assemblies

A secondary battery is provided for cycling between a charged and a discharged state, the secondary battery including a battery enclosure, an electrode assembly, carrier ions, a non-aqueous liquid electrolyte within the battery enclosure, and a set of electrode constraints. The set of electrode constraints includes a primary constraint system having first and second primary growth constraints and at least one primary connecting member, the first and second primary growth constraints separated from each other in the longitudinal direction, wherein the primary constraint array restrains growth of the electrode assembly in the longitudinal direction such that any increase in the Feret diameter of the electrode assembly in the longitudinal direction over 20 consecutive cycles of the secondary battery is less than 20%. The set of electrode constraints further includes a secondary constraint system having first and second secondary growth constraints connected by at least one secondary connecting member, wherein the secondary constraint system at least partially restrains growth of the electrode assembly in a second direction upon cycling of the secondary battery.

Dimensional constraints for three-dimensional batteries

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.

Longitudinal constraints for energy storage devices

Embodiments of secondary batteries having electrode assemblies are provided. A secondary battery can comprise an electrode assembly having a stacked series of layers, the stacked series of layers having an offset between electrode and counter-electrode layers in a unit cell member of the stacked series. A set of constraints can be provided with a primary constraint system with first and second primary growth constraints separated from each other in a longitudinal direction, and connected by at least one primary connecting member, and a secondary constraint system comprises first and second secondary growth constraints separated in a second direction and connected by members of the stacked series of layers. The primary constraint system may at least partially restrain growth of the electrode assembly in the longitudinal direction, and the secondary constraint system may at least partially restrain growth in the second direction that is orthogonal to the longitudinal direction.

Electrode assembly and secondary battery

Embodiments of a method for the preparation of an electrode assembly, include removing a population of negative electrode subunits from a negative electrode sheet, the negative electrode sheet comprising a negative electrode sheet edge margin and at least one negative electrode sheet weakened region that is internal to the negative electrode sheet edge margin, removing a population of separator layer subunits from a separator sheet, and removing a population of positive electrode subunits from a positive electrode sheet, the positive electrode sheet comprising a positive electrode edge margin and at least one positive electrode sheet weakened region that is internal to the positive electrode sheet edge margin, and stacking members of the negative electrode subunit population, the separator layer subunit population and the positive electrode subunit population in a stacking direction to form a stacked population of unit cells.

Electrode assembly manufacture and device

A secondary battery for cycling between a charged and a discharged state, wherein a 2D map of the median vertical position of the first opposing vertical end surface of the electrode active material in the X-Z plane, along the length LE of the electrode active material layer, traces a first vertical end surface plot, EVP1, a 2D map of the median vertical position of the first opposing vertical end surface of the counter-electrode active material layer in the X-Z plane, along the length LC of the counter-electrode active material layer, traces a first vertical end surface plot, CEVP1, wherein for at least 60% of the length LC of the first counter-electrode active material layer (i) the absolute value of a separation distance, SZ1, between the plots EVP1 and CEVP1 measured in the vertical direction is 1000 μm≥|SZ1|≥5 μm.

Constrained electrode assembly

Secondary batteries and methods of manufacture thereof are provided. A secondary battery can comprise an offset between electrode and counter-electrode layers in a unit cell. Secondary batteries can be prepared by removing a population of negative electrode subunits from a negative electrode sheet, the negative electrode sheet comprising a negative electrode sheet edge margin and at least one negative electrode sheet weakened region that is internal to the negative electrode sheet edge margin, removing a population of separator layer subunits from a separator sheet, and removing a population of positive electrode subunits from a positive electrode sheet, the positive electrode sheet comprising a positive electrode edge margin and at least one positive electrode sheet weakened region that is internal to the positive electrode sheet edge margin, and stacking members of the negative electrode subunit population, the separator layer subunit population and the positive electrode subunit population.

Electrode assembly, secondary battery, and method of manufacture

A secondary battery for cycling between a charged and a discharged state, wherein a 2D map of the median vertical position of the first opposing vertical end surface of the electrode active material in the X-Z plane, along the length LE of the electrode active material layer, traces a first vertical end surface plot, EVP1, a 2D map of the median vertical position of the first opposing vertical end surface of the counter-electrode active material layer in the X-Z plane, along the length LC of the counter-electrode active material layer, traces a first vertical end surface plot, CEVP1, wherein for at least 60% of the length Lc of the first counter-electrode active material layer (i) the absolute value of a separation distance, SZ1, between the plots EVP1 and CEVP1 measured in the vertical direction is 1000 &#x3bc;m&#x2265;|SZ1|&#x2265;5 &#x3bc;m.

A process for merging webs for the production of an electrode assembly for a secondary battery, the process comprising: moving a first web comprising a population of first components for electrode sub-units, the first components delineated by corresponding weakened patterns, and a population of first conveying features. Moving a second web comprising a population of second components for the electrode sub-units, the second components delineated by corresponding weakened patterns, and a population of second conveying features. Conveying a receiving member, the receiving member comprising a plurality of projections. Receiving the first web on the receiving member. Overlaying, the second web on the first web such that the first components are aligned with the second components and the conveying features of the second web are engaged by the plurality of projections on the receiving member. The second web merge location being spaced from the first web merge location.

Apparatus, systems and methods for the production of electrodes, electrode stacks and batteries

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Los Gatos, CA, United States of America

Gardner Cameron Dales