Processes for the manufacture of conductive particle films for lithium ion batteries and lithium ion batteries
AssigneeDragonfly Energy Corp.
InventorsDenis Phares, Justin S. Ferranto
Life of this patent
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Abstract
The invention is directed to a process for forming a particle film on a substrate. Preferably, a series of corona guns, staggered to optimize film thickness uniformity, are oriented on both sides of a slowly translating grounded substrate (copper or aluminum for the anode or cathode, respectively). The substrate is preferably slightly heated to induce binder flow, and passed through a set of hot rollers that further induce melting and improve film uniformity. The sheeting is collected on a roll or can be combined in-situ and rolled into a single-cell battery. The invention is also directed to products formed by the processes of the invention and, in particular, batteries.
Claims15
A method for forming a conductive particle film, the method comprising:
- spraying a mixture of conductive particles and a binder toward a substrate;
- electrically contacting an uncoated section of the substrate using a first electrode;
- electrically contacting a coated section of the substrate through the conductive particle film using a second electrode;
- and
- generating heat in the substrate between the uncoated section and the coated section of the substrate by passing current between the first and second electrodes.
Dependencies are inferred from the claim text.