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Specifications of Lithium Ion battery (Prismatic Type)
8. Precautions on Design of PDA, Charger and Battery Pack
8-1. Precautions on Design of PDA and Charger.
①Charge
･ A battery must be charged with constant current-constant voltage.
･ In case of UF103450P, charge current must be below 2.00A/cell.
･ Charge voltage must be set 4.20V/cell or less.
Concerning charge voltage tolerance of charger, charge voltage is recommended to set
below 4.23V/cell.
Even if the charge control could be out of order, consider the design that can secure
safety.
･ Have pre-charge system in charger.
In case of a battery voltage is below 3.0V, a battery should be charged with pre-charge
that current is below 0.18A. Then a battery voltage reaches over 3.0V, standard charge
starts. And if a battery voltage never reaches to 3.0V in specified period (timer), charger
stop charging.
･ Have full charge detection in charger.
By timer, current detection and open circuit voltage detection, charger detects full
charge. When charger detects full charge, charger stops charging. Do not use the
continuous charging (trickle charging) method.
･ Charge temperature range should be 0～+40℃.
②Discharge
･ Discharge current must be below 2.00A/cell.
･ Discharge temperature range should be -20～＋60℃.
･ Discharge end voltage must be over 2.75V/cell.
③ Over Discharge
･ Do not over discharge a battery below 2.0V/cell.
④ Battery position in PDA and charger.
･ To avoid degradation of battery performance by heat, a battery should set the place
apart from heat generating electronic parts inside PDA and charger.
8-2. Precautions on Battery Pack Design.
① Battery pack Shape, Mechanism and Material
･ Do not make the shape which easy connect to other chargers exclusive of charger.
･ Do not make the shape and mechanism which easy use another equipment exclusive of
PDA and charger.
･ Do not make the terminal shape which easy cause short circuit by metal object such as
necklaces, hairpins, etc. And further, have over current protection function to prevent
outer short circuit.
･ Do not make the terminal shape and mechanism which connect reverse to equipment.
･ Do not make the shape and mechanism which static electricity and water easy go
through the battery pack inside.
･ Make the shape and mechanism which can inspect protection circuit function (specified
paragraph 8-2②) before the battery pack makes completely.
File No
UF103450-849
Energy Company, SANYO Electric Co., Ltd.
Portable Rechargeable Battery Business Group
Lithium-Ion Battery Business Unit
page
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