Itron Inc. CCU100T Manual Do Utilizador
Chapter 4 Battery Care and Replacement
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CCU 100 and Repeater 100 Installation Guide
Proprietary and Confidential
Battery Storage and Charging
To ensure maximum lifespan and efficiency from your CCU/Repeater batteries, Itron
recommends the following storage and maintenance procedures.
recommends the following storage and maintenance procedures.
Long-Term Storage
Batteries may be stored for up to two years at room temperature (25°C or 77°F), and then
may be recharged with no loss in cell reliability or performance capabilities. The example
storage time versus temperature chart below is a plot of maximum storage time as a
function of storage temperature. This curve shows the maximum number of days at any
given temperature, from 10°C (50°F) to 65°C (149°F), for the battery to discharge from a
fully charged state of about 6.42 volts (2.14 volts per cell) down to a zero charge state of
5.79 volts or (1.93 volts per cell). The battery should not be allowed to discharge below
5.79 volts because of the danger of damaging the performance characteristics of the battery
permanently.
may be recharged with no loss in cell reliability or performance capabilities. The example
storage time versus temperature chart below is a plot of maximum storage time as a
function of storage temperature. This curve shows the maximum number of days at any
given temperature, from 10°C (50°F) to 65°C (149°F), for the battery to discharge from a
fully charged state of about 6.42 volts (2.14 volts per cell) down to a zero charge state of
5.79 volts or (1.93 volts per cell). The battery should not be allowed to discharge below
5.79 volts because of the danger of damaging the performance characteristics of the battery
permanently.
When batteries are stored at or near 25°C (77°F) it is recommend to conduct an open circuit
voltage (OCV) audit every six months and recharge when OCV readings approach 6 volts
(2.00 volts per cell). If storage temperatures are significantly higher than 25°C (77°F), even
for short durations, the frequency of OCV audits must increase.
voltage (OCV) audit every six months and recharge when OCV readings approach 6 volts
(2.00 volts per cell). If storage temperatures are significantly higher than 25°C (77°F), even
for short durations, the frequency of OCV audits must increase.
It is important to recognize that the self-discharge rate of the battery is non-linear. The rate
of self-discharge changes as the state of charge (SOC) of the battery changes. The time
taken for a battery to discharge from a 100% SOC to 90% SOC is different from the time it
takes to self-discharge from a 20% SOC to a 10% SOC.
of self-discharge changes as the state of charge (SOC) of the battery changes. The time
taken for a battery to discharge from a 100% SOC to 90% SOC is different from the time it
takes to self-discharge from a 20% SOC to a 10% SOC.