Solar Stik 21-0202317, Руководство оператора и по техническому обслуживанию

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| 19 April 2022 | Solar Stik® Inc.
Operator and Maintenance Manual for the 24VDC Li ESM 2000
Figure 9. SOH value reported by ESM 2000 and End of Life
ESM 2000 End of Life (EOL)
A new, unused ESM 2000 has a rated useful capacity of 82 Ah. The “industry standard” states a
battery is at EOL when the battery SOH drops to 80%. As such, EOL for this 82 Ah battery is actually
a battery with 66 Ah remaining capacity (see Figure 9 below) even though the Battery Status Indicator
reports 0% SOH. The battery can certainly be used beyond an SOH reading of 0% and may indeed
contain more capacity than expected. This is a predictive algorithm so it’s important to remember
that it is only an estimated useful lifetime.
ESM State of Health (SOH)
The battery implements a State of Health algorithm that predictively estimates the useful lifetime of
the battery cells. As shipped at beginning of life, the ESM 2000 is configured to deliver a nameplate
capacity of 82 Ah. As the battery is charged/discharged, heated/cooled, and calendar time elapses,
the cells will age and their useful capacity will decrease. The SOH algorithm keeps track of many
battery parameters and uses them along with characteristics from the cells themselves to estimate
the battery’s life.
Batteries such as the ESM 2000 are consumable components of a Hybrid Power System. Monitoring
and understanding HPS performance with respect to the battery SOH will assist in knowing when to
replace the batteries. Generally speaking, as the SOH decreases, generator runtime will increase, fuel
consumption will increase and the ability to support surge loads may be compromised. If the ESMs
are being used for an uninterruptible power supply (UPS), the length of time they can maintain the
load in the absence of prime power will decrease as SOH decreases. Proper planning is required to
ensure the usable battery capacity is sufficient to support the application or mission.
0%
0 Ah
82 Ah 66 Ah 49 Ah 33 Ah 16 Ah
SOH:
Capacity:
82 Ah
66 Ah
Capacity:
20% 40% 60% 80% 100%
SOH:
100%
0%
EOL
Industry-standard life span
Actual battery
capacity values
How to read the SOH meter:
When the Battery Status Indicator reports
85% SOH as shown below, the ESM has
lost 15% (2.4 Ah) of the top 16 Ah. The
actual remaining capacity is 79.4 Ah.
16 Ah
Values reported on
Battery Status Indicator
EOL