Datasheet

Hitachi Maxell, Ltd.
2-18-2, Iidabashi, Chiyoda-ku, Tokyo 102-8521, Japan
http://www.maxell.com
• Data and dimensions are just reference values. For further details,
please contact us at your nearest Maxell office.
• Contents on this website are subject to change without notice.
Warnings
ER Lithium Thionyl Chloride Battery
2/2
Supplied voltage to load
Because a diode and a resistor generate the voltage drop on operating, please take into consideration these voltage drops for supplied voltage to load.
Using diodes to prevent charging
Please choose diodes with leak current of no more than 0.5A.
Using and setting a protective resistor
A protective resistor is used to prevent the battery from being charged by large surges of current during diode failure. Please set the resistor so that the
maximum current shown in the right table is not exceeded. For example, say an ER6 battery is used in sample circuit A in combination with a main power
source 5 volt. Since the permitted charge current is 100A and this battery's voltage is 3.6V, let the resistor be R
>
=
(5V-3.6V)/100A=14k ohm, meaning that
at least 14k ohm is required.
Note: If the diodes broke down, it is necessary for safety to replace them as soon as possible even though using a protective resistor. Considering the
trouble of diodes and a resistor, other safety measures should be incorporated in the circuit design.
The battery may be regulated by national or local regulation. Please follow the instructions of proper regulation. As
electric capacity is left in a discarded battery and it comes into contact with other metals, it could lead to distortion,
leakage, overheating, or explosion, so make sure to cover the (+) and (-) terminals with friction tape or some other
insulator before disposal.
Minimum transient voltage
The various tests have shown that the minimum transient voltage is influenced greatly by the actual conditions of use and storage. Therefore, please design
your circuits using no more than the standard discharge current, taking into account the voltage drop due to the minimum transient voltage. Please consult
with Maxell beforehand if you are unsure of anything.
Installing, removing, and disposing of batteries
1) When installing a battery in a device, make sure that the positive terminal is facing up, or at least to the side. As this battery uses liquid thionyl chloride
as the positive active material, placing the positive terminal at the bottom will cause the thionyl chloride to become maldistributed, which could prevent the
needed performance from being obtained when a large amount of current is used.
2) Please have the installation, removal, and disposal of this battery performed by a technician with a thorough understanding of the Warnings and Cautions
on handling.
Storage
Avoiding storing the battery in direct sunlight, or in excessively hot and humid locations, and store it out of the way of rainwater and other adverse
environmental elements.
Bundling
When bundling the battery with a product, be sure to use cushioning and other packing to protect the battery (and especially the positive terminal) from jolts
and shocks during transportation.
(Example of battery insulation)
Diode
Example (A) Example (B)
Diode
Battery
Load
5V
Diode
Diode
Diode
Battery
Load
5V
Protective
resistor
Protective
resistor
Type Maximum Current
ER18/50 125A
ER17/50 125A
ER6 100A
ER6C 100A
ER17/33 70A
ER3 50A
ER3S 40A
Tape
Tape
+
–
This is a primary battery and cannot be charged. If used in memory or RTC back-up applications, be sure to use diodes to prevent charging from the main
power source or other batteries, and a protective resistor to regulate the current as shown in the figure below. Note that the points described below should
be taken into careful consideration when selecting diodes and a protective resistor.
Circuit Design for Back-up Use
WARNINGS
Disposal
WARNINGS
Handling
CAUTION