Buggies Gone Wild Golf Cart Forum - View Single Post

cramermy · 01-03-2019, 10:02 PM

Hi All, I have a late model year 2013 Ezgo RXV Fleet with stock Curtis 1206AC-5201 controller. I have the 4 @12v model. I hate my FLA batteries and they are just about shot so I want to upgrade to a nice 48V nominal Lifepo4 battery pack. I have been reading all the great info you have shared on lithium conversions, so thanks for all the great threads.

I've been communicating with a supplier in China who makes custom packs for lots of applications including golf cars. I'd love some advice on the suitability of the specs we have been discussing as outlined below for my specific cart model.

Thanks in advance for your comments.

• 48V 100Ah lifepo4 battery pack (Made by 32pcs 3.2V 50Ah lifepo4 in a 16s2p configuration) (single cell 3.2V 50Ah )
o Prismatic cells
o All wiring sized to handle peak discharge current
• BMS for the battery pack
o With LED display. The wire between the battery pack and LED display is about 8 feet
o Continuous discharging current 100A
o Peak discharging current (less than 5 seconds) 250A
o Discharging and charging port is the same port to accommodate the electric motor brake and regenerative braking
o Discharge voltage range 57.6V to 43.2V (2.7 v each cell)
o Discharge cutoff voltage 43.2
o Balancing voltage 3.5V difference of <=20mA
• Metal case(IP Rating--65) for the battery pack
o Maximum dimensions 333× 537×289mm,length,width,height.
• Charger for the battery pack with a charging current of 25A CC-CV

BMS (Battery management system specification) specification
• Single cell over-charge protection Voltage 3.70±0.03V, Delay 1.0±0.5S, Dismiss 3.40±0.03V
• Single cell over-discharge protection Voltage 2.70±0.05V, Delay 1.0±0.5S, Dismiss 3.10±0.05V, Charging
• Discharge over-current protection First rank 110±5A, Delay ≤2500mS, Second rank 130±5A, Delay ≤10mS
• Charging over-current protection 60A±5A, Short circuit, Current 180±10A Load short, circuit Delay ≤800μS
• Short circuit protection dismiss Charging cut off or disconnect the load
• Charge High temperature protection 65±3℃, Recover 55±3℃
• Low temperature protection -10±3℃, recover -1±3℃
• Discharge High temperature protection 75±3℃, Recover 65±3℃
• Low temperature protection -30±3℃, Recover -20±3℃

01-03-2019, 10:02 PM	#1
cramermy Not Yet Wild Join Date: Feb 2018 Location: NY Capital Region Posts: 21	Lifepo4 Pack Specificatons Hi All, I have a late model year 2013 Ezgo RXV Fleet with stock Curtis 1206AC-5201 controller. I have the 4 @12v model. I hate my FLA batteries and they are just about shot so I want to upgrade to a nice 48V nominal Lifepo4 battery pack. I have been reading all the great info you have shared on lithium conversions, so thanks for all the great threads. I've been communicating with a supplier in China who makes custom packs for lots of applications including golf cars. I'd love some advice on the suitability of the specs we have been discussing as outlined below for my specific cart model. Thanks in advance for your comments. • 48V 100Ah lifepo4 battery pack (Made by 32pcs 3.2V 50Ah lifepo4 in a 16s2p configuration) (single cell 3.2V 50Ah ) o Prismatic cells o All wiring sized to handle peak discharge current • BMS for the battery pack o With LED display. The wire between the battery pack and LED display is about 8 feet o Continuous discharging current 100A o Peak discharging current (less than 5 seconds) 250A o Discharging and charging port is the same port to accommodate the electric motor brake and regenerative braking o Discharge voltage range 57.6V to 43.2V (2.7 v each cell) o Discharge cutoff voltage 43.2 o Balancing voltage 3.5V difference of <=20mA • Metal case(IP Rating--65) for the battery pack o Maximum dimensions 333× 537×289mm,length,width,height. • Charger for the battery pack with a charging current of 25A CC-CV BMS (Battery management system specification) specification • Single cell over-charge protection Voltage 3.70±0.03V, Delay 1.0±0.5S, Dismiss 3.40±0.03V • Single cell over-discharge protection Voltage 2.70±0.05V, Delay 1.0±0.5S, Dismiss 3.10±0.05V, Charging • Discharge over-current protection First rank 110±5A, Delay ≤2500mS, Second rank 130±5A, Delay ≤10mS • Charging over-current protection 60A±5A, Short circuit, Current 180±10A Load short, circuit Delay ≤800μS • Short circuit protection dismiss Charging cut off or disconnect the load • Charge High temperature protection 65±3℃, Recover 55±3℃ • Low temperature protection -10±3℃, recover -1±3℃ • Discharge High temperature protection 75±3℃, Recover 65±3℃ • Low temperature protection -30±3℃, Recover -20±3℃