Lithium chemistry 'secondary' (rechargeable) batteries are an important
technology for electronic, portable power, and backup applications.
Electrode slurries, both 'anode'
and 'cathode' types, are coated directly onto metal foils, 'primed' foils,
or onto release films, for later lamination to foils or expanded foils.
Profile of the electrodes (and the active materials in the electrodes)
is very important for safe, efficient rechargeable batteries.
"Patch Coating" is
the stop/start coating of rectangles of coating material onto foils directly.
Patch sizes are set to accommodate a specific battery design. Length of
the coated and un-coated portions of the coating, as well as the profile
of the "head" and "tail" of the patches is adjustable
with Yasui Seiki battery coaters.
Patch coating is used to conserve
electrode materials, and to leave an un-coated border around the electrode.
Reverse side patch registration is a must for 2-sided electrodes.
Lithium Secondary batteries
of "Lithium Ion", and "Lithium Polymer" chemistries
are used for electronic, medical, and portable power (cordless) applications.
Lithium chemistry rechargeable batteries provide high energy storage.
The performance characteristics and cycle life of these batteries is friendly
to modern electronic devices.
Yasui Seiki Contributions:
Yasui Seiki provides battery
coating machines with optional patch coating capability. Registration
errors of patches, and backside patches is less than 1 mm, and any errors
with the Yasui Seiki system are non-cumulative.
We state electrode thickness
profiles are to be +/- 2.5 pct, however, recent advances have yielded
repeatable performance of +/- 1.5 pct for specific applications, either
with or without patch coating.
Our work continues to improve
our drying technology to push higher coating speeds for thick battery
Yasui Seiki has enhanced battery
electrode profile uniformity and repeatability through improvements in
Slot Dies, Slot Die mounting precision, carrier web speed uniformity,
and web tension uniformity. Contact us, we'll be happy to prove our capabilities
Copyright (c) 2012 MIRWEC Film, Inc.
P.O. Box 2263, 601 S. Liberty Dr, Bloomington, IN 47402 All