Abstract: Batteries that can have improved power delivery capabilities. One example can provide an anode electrode having an increased surface area. This increase in surface area can improve electrolyte wetting capability and lithium ion diffusion kinetics. The improved electrolyte wetting capability and lithium ion diffusion kinetics can enable better cell charge and discharge capabilities and a longer cycle life. The surface area of the anode electrode can be increased by mechanically forming holes, slots, lines, or other patterns in the surface of the anode electrode. A protective layer can be formed on the surface of the anode electrode using spatial atomic layer deposition. The protective layer can be formed of aluminum oxide.

Abstract: An electrode assembly includes an electrode having a laminated foil disposed between a first active material layer and a second active material layer, where the laminated foil includes a polymer substrate disposed between a first laminate layer and a second laminate layer. The electrode assembly also includes a plurality of perforations extending through the first active material layer, the second active material layer, and the laminated foil.

Abstract: A battery comprising a cover including a cover main wall and a first cover sidewall extending from the cover main wall at a first substantially perpendicular angle, a base including a base main wall and a first base sidewall extending from the base main wall at a second substantially perpendicular angle, a sidewall structure. A first end of the sidewall structure is coupled against the cover main wall and the first cover sidewall to define a first interior corner therebetween. A second end of the sidewall structure is coupled against the base main wall and the first base sidewall to define a second interior corner therebetween. The first and second interior corners include a substantially zero radius. The cover, the base, the sidewall structure, the first interior corner, and the second interior corner define an interior volume. The battery further comprises a battery cell stack positioned in the interior volume.

Abstract: A battery formation system, comprising a first pressing platform, a second pressing platform, and a press assembly configured to move the first pressing platform towards the second pressing platform to apply a pressing force on an unfinished battery. The first pressing platform is coupled to the press assembly and rotatable relative to the second pressing platform. The battery formation system further comprises a pressure film sensor coupled to the pressing platform and configured to output pressure data corresponding to the pressing force, and a computer system in communication with the pressure film sensor. The computer system includes one or more computer processors configured to receive the pressure data from the pressure film sensor, determine, based on the pressure data, pressure information that is representative of the first pressing platform, and send instructions to adjust an angle of the first pressing platform based on the pressure information.

Abstract: A battery electrode matching system includes one or more sensors configured to detect a first characteristic of a first electrode and a second characteristic of a second electrode, one or more signature applicators configured to mark the first electrode with a first signature and the second electrode with a second signature, and memory circuitry. The memory circuitry is configured to store a first profile corresponding to the first electrode, the first profile including first data indicative of the first characteristic and the first signature. The memory circuitry is also configured to store a second profile corresponding to the second electrode, the second profile including second data indicative of the second characteristic and the second signature.

Abstract: The disclosed technology relates to manufacturing a battery cell. Manufacturing the battery cell can include applying a mask onto a first surface of a current collector, coating the first surface of the current collector with an active coating, removing the mask from the first surface of the current collector, stamping the current collector to form an anode layer with an uncoated tab, and arranging a stacked set of layers within an enclosure, such that the stacked set of layers comprise a cathode layer, the anode layer, and a separator layer disposed between the cathode layer and the anode layer.

Abstract: A battery includes a separator having a first side and a second side opposing the first side. The battery also includes an anode having an anode face that faces the first side of the separator, where the anode face includes an anode face surface area. The battery also includes a cathode having a cathode face that faces the second side of the separator, where the cathode face includes a cathode face surface area. A surface area ratio between the anode face surface area and the cathode face surface area is between 1.030 and 1.038.

Abstract: A housing of a battery may be produced to have a reduced flange, such that an interior volume of the housing is increased. The housing may include a can and a cover welded to one another to form a flange of the housing. The cover may be generally planar, and the can may include a curved portion and a planar portion extending from the curved portion. The planar portion may be welded to the cover to form the flange. A weld seam between the can and the cover may begin generally at an end of the planar portion of the can adjacent to the curved portion, and the flange may be cut along or adjacent to the weld seam. In particular, a distance between a transition point of the curved portion of the can and an outermost end of the flange may be less than 300 microns.

Abstract: The disclosed technology relates to manufacturing a battery cell. Manufacturing the battery cell can include applying a mask onto a first surface of a current collector, coating the first surface of the current collector with an active coating, removing the mask from the first surface of the current collector, stamping the current collector to form an anode layer with an uncoated tab, and arranging a stacked set of layers within an enclosure, such that the stacked set of layers comprise a cathode layer, the anode layer, and a separator layer disposed between the cathode layer and the anode layer.

Abstract: Methods and structures for manufacturing and assembling matching parts in a manufacturing line are described. In some embodiments, the parts are portions of a consumer product, such as an electronic device. The matching parts are manufactured and assembled in a way such that the interface between the matching parts is substantially seamless. In some embodiments, the interface has a feature with curved portions. Methods involve measuring the dimensions of a primary part and custom machining a secondary part to seamlessly fit with the primary part. In this way, the secondary part is made to uniquely fit the primary part. The primary and secondary parts can be marked to identify them as matching parts in a manufacturing environment where numerous pairs of parts are made.

Abstract: Methods and structures for manufacturing and assembling matching parts in a manufacturing line are described. In some embodiments, the parts are portions of a consumer product, such as an electronic device. The matching parts are manufactured and assembled in a way such that the interface between the matching parts is substantially seamless. In some embodiments, the interface has a feature with curved portions. Methods involve measuring the dimensions of a primary part and custom machining a secondary part to seamlessly fit with the primary part. In this way, the secondary part is made to uniquely fit the primary part. The primary and secondary parts can be marked to identify them as matching parts in a manufacturing environment where numerous pairs of parts are made.