bcassedy
New Member
I am in the process of designing and building a "portable" 280 AH LiFePo4 battery. "Potable" in that I will be moving it between our popup camper and large (41') Marinette Marquis cabin cruiser boat. We can't be in 2 places at one time so it seemed reasonable (and economical!) to have the ability to have a battery that could move between the two with us. We don't use the camper that often so the movement between the two will be minimal.
The construction will use a large tool box as the housing of the components. All below components will fit (some already acquired) inside of housing)
- 4 - 280AH LiFePo4 cells (acquired),
- the 280AH cells are to have a 1/16" to 1/8" separator between them,
- 1/4" foam medium density foam cushion (think 'walk/stand on "fatigue reducing mat") on the bottom of the box to absorb jarring during vehicle movement (highly likely pulling camper on road trip),
- a single 20A Victron DC - DC charger, (acquired)
- a Daly 200A BMS (acquired)
- Heavy gauge battery thru wall battery connectors for hookup to the vehicle's feed from the house battery, (acquired)
- #1 (#2 or ???) gauge cables to battery side of 2000watt inverters (1 each in each vehicle - camper already has 1 as I used 2 - 6V golf cart batteries initially but their several years old. Boat' never had an inverter system)
- (not part of 'portable battery' but just FYI) 2000w inverter.
My primary question:
The 280 AH cells I bought (from 18650 battery store) utilize dual buss bar welded on terminals. They came with solid straight nickel coated copper buss bars. My concern is with jostling and possible movement/shifting and the buss bars potential for movement/loss of solid connectivity. To mitigate this, I'm considering making up my own buss bars using welding cable & crimp on lugs. I have a hydraulic crimper to ensure a solid fit/connection.
--> what gauge copper cable would you recommend for the intended buss bars?
.... or do you recommend anything, buss bar-wise, else?
The construction will use a large tool box as the housing of the components. All below components will fit (some already acquired) inside of housing)
- 4 - 280AH LiFePo4 cells (acquired),
- the 280AH cells are to have a 1/16" to 1/8" separator between them,
- 1/4" foam medium density foam cushion (think 'walk/stand on "fatigue reducing mat") on the bottom of the box to absorb jarring during vehicle movement (highly likely pulling camper on road trip),
- a single 20A Victron DC - DC charger, (acquired)
- a Daly 200A BMS (acquired)
- Heavy gauge battery thru wall battery connectors for hookup to the vehicle's feed from the house battery, (acquired)
- #1 (#2 or ???) gauge cables to battery side of 2000watt inverters (1 each in each vehicle - camper already has 1 as I used 2 - 6V golf cart batteries initially but their several years old. Boat' never had an inverter system)
- (not part of 'portable battery' but just FYI) 2000w inverter.
My primary question:
The 280 AH cells I bought (from 18650 battery store) utilize dual buss bar welded on terminals. They came with solid straight nickel coated copper buss bars. My concern is with jostling and possible movement/shifting and the buss bars potential for movement/loss of solid connectivity. To mitigate this, I'm considering making up my own buss bars using welding cable & crimp on lugs. I have a hydraulic crimper to ensure a solid fit/connection.
--> what gauge copper cable would you recommend for the intended buss bars?
.... or do you recommend anything, buss bar-wise, else?
