sla battery changed for lifepo4 24v 30a goped esr

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harryo
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Last seen: 9 years 5 months ago
Joined: Sunday, May 23, 2010 - 12:13
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sla battery changed for lifepo4 24v 30a goped esr

I recently upgraded my goped esr battery(sla)for (ping)lifepo4 24v 30a battery(see specs under).Put the red/black(thick) on the controller wires and the thin wires to the charger,with no one on it it works just fine(normal and turbo) but when i'm driving with it and when i want to go fast it just turns off i have to put it off and on and then it do just the same.Is there anyone who knows what the problem is because i want to drive with it soon on my holiday 22052010581.jpg thanx

Specifications:
Suitable Wattage of Motor: up to 800W rated motor, 600 Watt suggested
Applications: E-Bike, Electric Bike, E-Scooter, Electric Scooter

Voltage: 24 Volts
Capacity: 30 Amp Hours
Dimension: 300x105x150 mm / 11.9x4.1x5.9 inches
Weight: 7.50 kg / 16.5 lbs
Charging Voltage: 30 Volts
Charging Current: <10 Amps
Rated Discharging Amperage: 30 Amps
Max Continuous Discharging Amperage: 60 Amps
Maximum Discharging Current: 100 Amps
Discharging Cut-off Protection: 75 Amps
Lifecycle of the whole pack: >85% capacity after 1000 cycles. Lifecycle of single cell: >85% capacity after 1500 cycles, >70% capacity after 3000 cycles. (<1C discharge rate and <1C charge rate

antiscab
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Last seen: 1 week 6 days ago
Joined: Saturday, July 7, 2007 - 23:55
Points: 1686
Re: sla battery changed for lifepo4 24v 30a goped esr

I recently upgraded my goped esr battery(sla)for (ping)lifepo4 24v 30a battery(see specs under).Put the red/black(thick) on the controller wires and the thin wires to the charger,with no one on it it works just fine(normal and turbo) but when i'm driving with it and when i want to go fast it just turns off i have to put it off and on and then it do just the same.

Its the BMS complaining about the high(ish) current draw.
they are a bit over cautious.

simple fix is to have the bms power a contactor (a kilovac EV200 is my favourite), rather than have the main power wires running through it.
that means:
the BMS no longer protects from overcurrent (not really an issue anyway)
the BMS still protects from overdischarge and overcharge
the BMS is less likely to fry silicon in the event of sustained high currents.

Matt

Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst 2 x TC Charger & MC
conversion

harryo
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Last seen: 9 years 5 months ago
Joined: Sunday, May 23, 2010 - 12:13
Points: 4
Re: sla battery changed for lifepo4 24v 30a goped esr

24052010590.jpgOk thanx for your answer.Is this the only way(cheapest,fastest,safest way)and if yes how do i connect this contactor(kilovac ev 200)(see my picture/situation)in my goped?gr.Harry

antiscab
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Last seen: 1 week 6 days ago
Joined: Saturday, July 7, 2007 - 23:55
Points: 1686
Re: sla battery changed for lifepo4 24v 30a goped esr

connect like so:

contactor+BMS.JPG

a contactor is much like a relay.
theres two small signal wires, and two heavy wires for the switch.

Matt

Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst 2 x TC Charger & MC
conversion

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