Victron energy LiFePO4 Battery 12,8V/60Ah Smart, Руководство пользователя

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The indication of imbalance is that the BMS frequently disables the charger. On a well-balanced battery the charger would not be
disabled – not even once the batteries are fully charged.
More details can be seen with the VictronConnect App. Be aware that checking the cell balance can be done only near the end of
a charge cycle. It’s best to wait for the battery voltage to reach 14.2V, and then check the individual cell voltages. They should all
be between 3.50 and 3.60V. And over time they will all become equal at 3.55V. By that time the battery will be completely charged
and balanced.
In case the charger is already in its float cycle, and because of that, the voltage has dropped to 13.5V (27V), restart the charger to
lift the battery voltage back up to 14.2V (28.4V).
The screenshot below shows a fully balanced battery. Note the two above explained indications: (a) the battery voltage is 14.2V,
meaning that it is OK to now check the balance, and (b) the cell voltages are each exactly one fourth of that value: 3.55V and are
all equal.
A balanced battery
How to re-balance a battery
To re-balance, fully charge the battery once more. The balancing occurs at the end of the charge cycle. This is when the charger
is in the “fixed“ 2-hour length absorption stage.
Once all cells show 3.55V, the battery is properly balanced again.
Restart the charger in case the charger already finishes its absorption stage before the cell balance is restored.
8.2.2. Less capacity than expected
If the battery capacity is less than its rated capacity these are the possible reasons for that:
• The battery has a cell imbalance, causing premature low voltage alarms, which in turn cause the BMS to turn loads off. Please
refer to paragraph “Charge battery before use”.
• The battery is old and is near its maximum cycle life. Check how long the system has been in operation, check how many
cycles the battery has gone through and to what average depth of discharge the battery has been discharged? A way to find
this information is to look at the history of a battery monitor (if available).
• The battery bas been too far discharged and one or more cells in the battery are permanently damaged. These bad cells will
have a low cell voltage faster than the other cells and this will cause the BMS to turn loads of prematurely. Has the battery
perhaps been through a very deep discharge event?ischarged? A way to find this information is to look at the history of a
battery monitor (if available).
Lithium Battery Manual
Page 29 Troubleshooting, support and warranty