Connecting Lithium Batteries In Series And Parallel - Whisper Power Lithium Plus User Manual

Minus (-)
Figure 15. Three Lithium batteries in parallel with external relay
OK: Equally divided battery current.
All batteries contribute equally to the current into the load.
NOT OK: Current not equally divided.
Batteries closest to load will have the highest contribution to the current into the load.
Whereas batteries further away from load will have lesser current contribution.
Wear and tear will be higher on the Lithium battery close to the load.
When using Lithium batteries in parallel configuration CAN balancing is not required.
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4.6.5. Connecting Lithium batteries in series and parallel

Caution! B efore connecting 2 or more Lithium batteries,
Caution! F or more than 4 Lithium batteries in series and
Caution! D epending on the installation a precharge circuit is needed. For further
WhisperPower Lithium Plus 12 V 210 Ah 340 Ah
OK
J1_BREL
X2
BT4
J2_IO
X1
J3_CAN
J1_BREL
X2
J2_IO BT5
X1
J3_CAN
J1_BREL
X2
J2_IO BT6
X1
J3_CAN
Plus (+)
Load
the Lithium batteries must be charged to 100% SoC.
parallel connection consult Whisper Power or your dealer.
information consult WhisperPower or your dealer.
NOT OK
J1_BREL
X2
BT1
J2_IO
X1
J3_CAN
J1_BREL
X2
J2_IO BT2
X1
J3_CAN
J1_BREL
X2
J2_IO BT3
X1
J3_CAN
Minus (-)
Plus (+)
Load
25