redscott
1 mW
I finally got enough wiring done to attempt a test of the systems and I think I'm having a battery problem.
I have two 12v batts and a 24v controller. I was tryng to figure out which wires on the hand throttle to use and wasn't getting any response at all so I start looking for bad wires. I tried touching the motor's wires directly to the battery posts. The right hand batt will make the motor spin with no problem. When I touch the wires to the posts on the lefthand batt I get nothing.
The batts are Enduring Battery (Zhongshan Hengli)valve regulated lead acid sealed CB 12-12 (12v12ah/20hr)
Printed on the side of the batt it says: "Cycle use: 14.5 - 14.9v 77F 25C / Initial charge current: Less that 3.6a
Standby use: 13.6 - 13.8v 77f 25c / Initial charge current less than 1.8a"
Then it says the usual stuff about risk of fire, explosion etc.
The voltage meter shows the right hand batt has 12.69 v and the left hand shows 12.3
I had the batts sitting on a shelf for about 6 months before I got enough wires done to use them. I know they can discharge to ground, so they were sitting on a plastic shelf. Do you suppose I got a bad set or should they come back if I leave the charger on them for a full day?
Chris Rouse at TNC Scooters, who I bought all the parts from, suggested testing them "under load" - I did that test after having both batteries on the 24v charger overnight. One batt only dropped to 11.5v and then went back up to about 12.1v while the wheels were spinning. The other dropped straight to zer0 and stayed there without spinning the wheels at all. What does that tell me?
He also suggeted "cycling" them - discharge, recharge, etc. I hooked up both batts in parallel to a 12v fan and ran them all night. The cats enjoyed lying on the concrete with the fan blowing across their bellies.
This morning both batts measure about 11.8v while the fan was still running. After they rested a few minutes one read 12.3v and the other reads 12.6v. Now I'm not certain which one was the weaker. Then I tried the load test again and one of them went straight to zer0.
I wired them together in series to use the 24v charger again. Together I get a voltage of 24.9v Now I'm letting them recharge again.
Oddly, I can touch the motor wires to a 9v radio batt and the motor spins - but w/o much torque, of course. The fact that one batt won't even spin the motor seems freaky.
What do you think?
Randy
I have two 12v batts and a 24v controller. I was tryng to figure out which wires on the hand throttle to use and wasn't getting any response at all so I start looking for bad wires. I tried touching the motor's wires directly to the battery posts. The right hand batt will make the motor spin with no problem. When I touch the wires to the posts on the lefthand batt I get nothing.
The batts are Enduring Battery (Zhongshan Hengli)valve regulated lead acid sealed CB 12-12 (12v12ah/20hr)
Printed on the side of the batt it says: "Cycle use: 14.5 - 14.9v 77F 25C / Initial charge current: Less that 3.6a
Standby use: 13.6 - 13.8v 77f 25c / Initial charge current less than 1.8a"
Then it says the usual stuff about risk of fire, explosion etc.
The voltage meter shows the right hand batt has 12.69 v and the left hand shows 12.3
I had the batts sitting on a shelf for about 6 months before I got enough wires done to use them. I know they can discharge to ground, so they were sitting on a plastic shelf. Do you suppose I got a bad set or should they come back if I leave the charger on them for a full day?
Chris Rouse at TNC Scooters, who I bought all the parts from, suggested testing them "under load" - I did that test after having both batteries on the 24v charger overnight. One batt only dropped to 11.5v and then went back up to about 12.1v while the wheels were spinning. The other dropped straight to zer0 and stayed there without spinning the wheels at all. What does that tell me?
He also suggeted "cycling" them - discharge, recharge, etc. I hooked up both batts in parallel to a 12v fan and ran them all night. The cats enjoyed lying on the concrete with the fan blowing across their bellies.
This morning both batts measure about 11.8v while the fan was still running. After they rested a few minutes one read 12.3v and the other reads 12.6v. Now I'm not certain which one was the weaker. Then I tried the load test again and one of them went straight to zer0.
I wired them together in series to use the 24v charger again. Together I get a voltage of 24.9v Now I'm letting them recharge again.
Oddly, I can touch the motor wires to a 9v radio batt and the motor spins - but w/o much torque, of course. The fact that one batt won't even spin the motor seems freaky.
What do you think?
Randy
