So I finally got everything in place to test the Sealed lead acid and NiMH battery packs together.
My particular Nkpk (nimh pack) shows a charge voltage of 13.5o or so after resting overnight. I put together and 18ah pack comprised of (3) 12v 18ah batteries. Each battery is made up of 2 sub batteries make up of ten c cell nimh batteries. Each of the 12v 18ah batteries is actually 20 c cells. ten in series and then two sets of the ten in parallel. Then of course 3 of the 12v 18ah batteries are strung in series to make 36v.
That battery pack was connected in parallel with a very old 12ah SLA 36v pack (slak). It left the house at approx the same voltage as the NKPK.
I chose the old 12ah pack to start my test because it had done two miles before it had a sever drop in voltage just s few days ago. So with everything set and a few false starts to get the wires tight, (Waiting for connectors from china to make a more solid wiring pack) I was off for my test.
I decided to take the exact route where the sla batteries failed at two miles. The first thing I noticed was that the bike had more torque than usual. I could climb hills with throtte way under the wot position I had been using. The test bike has no suspension, I was also pulling a trailer so I didn't try a speed test. I did do all the speed I wanted and there was plenty of throttle left for increases on the hills.
When I hit the two mile mark the battery pack was still running great so I swung the bike onto my test track. After another mile the battery was till in good shape, so I swung it onto the second mile of the test track. At the four mile mark (Double the distance of the year old slak) the bike was still running strong but a wire came loose so I took it home. The slak read 13v. It still had at least another mile in it. The NKPK had 13.25v plenty of power to boost the slak another mile at least possibly more.
Now this thing needs a lot more testing but at this moment I have to admit I like it, I didn't even use the other 10ah NKPK pack. If these finding hold up, I for sure will not be buying 17ah or 30ah sla batteries. I wonder what a 7ah slak would do with the 27ah NKPK. Now wouldn't that just be groovy.
PS when the wire got loose on the slak I pulled the bike in with the power from the NKPK only. It ran like a pig but it was helpful with the pedaling. The test bike has the chain ring from a 16 bike so without the NKPK there would have been a whole lot of pedaling required.
My particular Nkpk (nimh pack) shows a charge voltage of 13.5o or so after resting overnight. I put together and 18ah pack comprised of (3) 12v 18ah batteries. Each battery is made up of 2 sub batteries make up of ten c cell nimh batteries. Each of the 12v 18ah batteries is actually 20 c cells. ten in series and then two sets of the ten in parallel. Then of course 3 of the 12v 18ah batteries are strung in series to make 36v.
That battery pack was connected in parallel with a very old 12ah SLA 36v pack (slak). It left the house at approx the same voltage as the NKPK.
I chose the old 12ah pack to start my test because it had done two miles before it had a sever drop in voltage just s few days ago. So with everything set and a few false starts to get the wires tight, (Waiting for connectors from china to make a more solid wiring pack) I was off for my test.
I decided to take the exact route where the sla batteries failed at two miles. The first thing I noticed was that the bike had more torque than usual. I could climb hills with throtte way under the wot position I had been using. The test bike has no suspension, I was also pulling a trailer so I didn't try a speed test. I did do all the speed I wanted and there was plenty of throttle left for increases on the hills.
When I hit the two mile mark the battery pack was still running great so I swung the bike onto my test track. After another mile the battery was till in good shape, so I swung it onto the second mile of the test track. At the four mile mark (Double the distance of the year old slak) the bike was still running strong but a wire came loose so I took it home. The slak read 13v. It still had at least another mile in it. The NKPK had 13.25v plenty of power to boost the slak another mile at least possibly more.
Now this thing needs a lot more testing but at this moment I have to admit I like it, I didn't even use the other 10ah NKPK pack. If these finding hold up, I for sure will not be buying 17ah or 30ah sla batteries. I wonder what a 7ah slak would do with the 27ah NKPK. Now wouldn't that just be groovy.
PS when the wire got loose on the slak I pulled the bike in with the power from the NKPK only. It ran like a pig but it was helpful with the pedaling. The test bike has the chain ring from a 16 bike so without the NKPK there would have been a whole lot of pedaling required.