SAFIERY UNIVERSITY
LITHIUM BATTERIES
MULTIPLE SETS IN PARALLEL AND SERIES HAS MAJOR ADVANTAGES.
This technical article is designed to give value to the reader through more knowledge on Lithium Batteries.
Lithium Batteries consist of 4 sets of Lithium cells connected in series and make up the bulk of the Lithium Battery casing. The cells run in vertical layers longitudinally along the battery length.
At the top of the battery casing are the management units.
Safiery Lithium Batteries are fitted with not just a Cell Balancing Management Unit but an additional Battery Management Unit which allows these batteries to be installed in parallel or series connection. This additional management unit is included in the price.
Here is a photo in the factory test bay of 6 Safiery 125Ahr batteries under test in parallel configuration. They are being stressed to maximum charge and discharge. There is a total of 6 x 125 = 700 Ahrs of capacity here.
The benefit of multiple Lithium Batteries in parallel compared to a single battery of similar capacity are:
- Can provide power to larger inverter and operate any of the devices in the table below:
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|
Required for Nespresso Mini Espresso |
Required for Microwave and Induction cooktop |
Required for Aircon from Battery |
|
Rating in kw |
Mini Expresso 1240W |
Induction 2000W or Microwave 1600W |
Startup 4.3kw Operating current with Truma rooftop unit is 70A DC after startup |
|
Continuous |
100A |
80-120A |
120A |
|
Burst discharge |
|
160A Max for 15 min |
460A for 1-2 secs |
|
2 x 125 Ahr Safiery Batteries |
200A Continuous |
200A Continuous |
200A Continuous 700A burst for 3 secs |
- In normal everday use, 2 x 125 Ahr will have a lower depth of discharge compared to a single 200Ahr Battery. A lower depth of discharge contributes to a longer cycle life of the batteries.
- Safiery 125 Ahr can be installed on any side except they can’t be inverted. The shape combinations give more flexibility in locating with ease of access. Combination sizes are:
|
All in mm |
Placed on top of each other lengthwise terminals facing forward |
Placed side by side, terminals facing in up position |
Placed side by side with small face down, terminals facing forward |
|
Combined Dimensions of 2 x 125 ahr Safiery lithium |
318 L 430 H 165 D |
318 L 215 H 330 D |
330 L 318 H 215 D |
|
|
In Parallel Sets |
In Series Set |
In Series and Parallel |
|
Combined Voltage and Ahrs of Multiple 125 ahr Safiery lithium |
6 x 125 ahr Safiery lithium 12.8V 700Ahrs |
4 x 125 ahr Safiery lithium 51.2 V 125 Ahrs |
6 x 125 ahr Safiery lithium 25.6 V 375 Ahrs |
Battery Management Unit maps to Safiery App so the user can see the exact value of the Lithium cells.
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