Let's talk batteries

[slabghost]

Here's another option that isn't even a battery at all.
https://www.youtube.com/watch?v=8miq6sDy0wA

 

[Ansimp]

Interesting :yes:

 

[Dusterdude]

This is what im going to use

 

[Dusterdude]

Ill see how it does

 

[joedrum]

great ..this will be interesting ...

 

[slabghost]

Looks like a good one. Does it include the pigtail and other connector? That should wire up to ground and battery side of the solenoid.

 

[Dusterdude]

The big plug is to the ign switch and ground,the little plug is the charging plug.ill have to figure which wire goes to the generator

 

[Ansimp]

Looks like a good choice :good:

 

[Dusterdude]

Lets hope,thanks

 

[Dusterdude]

Found out the lipo wont work without a lot of fussing around with it,bought a 7 amp agm.we'll see how that works

 

[zman]

The Lithium ion requires a lower charging rate then out stock 14.5 volts, they can explode with stock set ups.

 

[Dusterdude]

The thing that threw me off is,those batteries have a power out side and a charging input side.the guy i was going to buy the battery from told me it had to be charged with a charger designed for them.i could run the battery total loss but i didnt want to push it

 

[ekvh]

I found with mine that it needed the normal charging rate. When I ran a relay, it would slowly kill the charge. When I removed the relay, it has been fine. Standard charge of LiPO4 batteries is 3.3 volts. Four of them equal 14.2 volts. With the relay and sense wire directly reading to the battery, I figured it was slowly allowing the battery to be discharged as it wasn't brought up to full charge. With the relay in place, it would keep a steady 13.6 volts iirc. It wasn't able to crank the motor over for more than 4-5 series of cranks without a recharge. My guess is that it was slowly losing it's charge??? All I know is I put it back to stock wiring and it has been fine ever since. There are warnings not to overcharge or undercharge them much. I haven't checked it much since. I read it once this summer and it was sitting overnight at 14.7 volts. A bit higher than I'd like to see. When I started it, it dropped and ran a steady 14.2 at idle. I should check it with a different meter. My meter could be wrong. It spins it over very easily now and can handle a series of compression checks and wiring checks without needing the charger. An adjustable regulator or LiPO4 specific regulator might be needed on these. The voltages and battery differences between lead acid and LiPO4 might be different enough to warrant this. I believe Hybrids use these batteries. I wonder what they have for regulating the charging cycle?

 

[Dusterdude]

Eric,do you have a pic of your battery?

 

[ekvh]

the pic in the bike doesn't reveal a lot because it was wrapped with foam.

 

[Dusterdude]

Neat look to it

 

[zman]

ekvh » Sun Oct 11, 2015 5:49 am[/url]":3t19j6i5]
I found with mine that it needed the normal charging rate. When I ran a relay, it would slowly kill the charge. When I removed the relay, it has been fine. Standard charge of LiPO4 batteries is 3.3 volts. Four of them equal 14.2 volts. With the relay and sense wire directly reading to the battery, I figured it was slowly allowing the battery to be discharged as it wasn't brought up to full charge. With the relay in place, it would keep a steady 13.6 volts iirc. It wasn't able to crank the motor over for more than 4-5 series of cranks without a recharge. My guess is that it was slowly losing it's charge??? All I know is I put it back to stock wiring and it has been fine ever since. There are warnings not to overcharge or undercharge them much. I haven't checked it much since. I read it once this summer and it was sitting overnight at 14.7 volts. A bit higher than I'd like to see. When I started it, it dropped and ran a steady 14.2 at idle. I should check it with a different meter. My meter could be wrong. It spins it over very easily now and can handle a series of compression checks and wiring checks without needing the charger. An adjustable regulator or LiPO4 specific regulator might be needed on these. The voltages and battery differences between lead acid and LiPO4 might be different enough to warrant this. I believe Hybrids use these batteries. I wonder what they have for regulating the charging cycle?

I agree some kind of limiter/safety would be needed, sometimes these charging systems run wild with a faulty regulator or connection to the regulator, most times not noticed till something fails or one just happen to be checking the battery voltage or a boil over condition, seen may posts about 15+ volts. Would at least feel better with a Mosfet regulator but another safety would be better.

 

[slabghost]

Joe moved his reg/rec sense wire to the battery. Charge has been very steady and reliable since then. Seems as reliable now as the mosfet regulators.

 

[pidjones]

With a Lipo, I'd sure have a dependable charge regulator. And contain it properly! Ever seen a Lipo blow up? Check Youtube and think of where your battery sets.

 

[Denver]

Like the guy at the Deka battery store said, not just yet, :nea: but more than likely in the future, because of the weight factor,if nothing else. :good: At the present time A G M's are the best bet in his opinion, & mine so far, they don't have the bad tendency of BLOWING UP . :yes: Gave me good advice over 10+ years ago when he told me to spend the extra money, & buy the A G M battery. :whistling: