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  #4561  
Old 02-13-2019, 07:51 PM
Iamnuts Iamnuts is offline
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Posts: 258
Looking.

I keep on researching battery systems and came across the Toyota synergy
motor-generator system.
I was intrigued and tried out an ancient Prius.
I couldn't see how the electric transmission was going to be as efficient as
a conventional gearbox.
The old Prius was smooth and went OK. but was rather steady on hills.
What was impressive was the MPG.
The battery was a weedy 6.5ah. Ni Mh, 210v. prismatic. IMG_3846.JPG
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  #4562  
Old 02-13-2019, 11:17 PM
Iamnuts Iamnuts is offline
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Found this.

http://www.energeticforum.com/attach...1&d=1550099834
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  #4563  
Old 02-14-2019, 10:28 AM
thaelin thaelin is offline
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Posts: 84
Looking...

It was only supposed to get you to a set speed then over to gas. As a battery, it had no guts so to speak. Then there was the cost, around 9K in the beginning. That was the batt tech for the Chev Volt too. Designed for it in fact.


Quote:
Originally Posted by Iamnuts View Post
I keep on researching battery systems and came across the Toyota synergy
motor-generator system.
I was intrigued and tried out an ancient Prius.
I couldn't see how the electric transmission was going to be as efficient as
a conventional gearbox.
The old Prius was smooth and went OK. but was rather steady on hills.
What was impressive was the MPG.
The battery was a weedy 6.5ah. Ni Mh, 210v. prismatic. IMG_3846.JPG
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  #4564  
Old 02-14-2019, 12:29 PM
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altrez altrez is online now
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Hello,

I got most of my equipment in yesterday. I ordered another DC load tester that has two channels. That way I can run a control load and also the load for the 3 battery test at the same time.

The two ways that I have now to log is with my USB data logger and with the mooshie meter. I am also going to take pictures as often as I can of my watt meters while the tests are running.

Here are a few staging pics for the weekend:






Lots of work to do!!!

-Altrez
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  #4565  
Old 02-14-2019, 05:40 PM
bistander bistander is online now
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Mooshie meter

Hi Altrez,

Went to use mine this morning and failed to connect Bluetooth-wise. Batteries were down to 1.3V. I replaced them and back to normal. I'd heard these meters go thru the cells rapidly. Something to watch for and keep spares on-hand.

Regards,

bi
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  #4566  
Old 02-14-2019, 10:32 PM
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altrez altrez is online now
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Quote:
Originally Posted by bistander View Post
Hi Altrez,

Went to use mine this morning and failed to connect Bluetooth-wise. Batteries were down to 1.3V. I replaced them and back to normal. I'd heard these meters go thru the cells rapidly. Something to watch for and keep spares on-hand.

Regards,

bi
Hello bi,

Yes I have noticed that my battery's are already at 50%!

-Altrez
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  #4567  
Old 02-15-2019, 01:03 AM
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altrez altrez is online now
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A question for the group,

I have 4 brand new 7ah battery's that I am testing. They all show about the same voltage under load and capacity with my tester. It shows they are 66% full.

I put one on my charger at a rate of 3.6 amps and let it run for 90 minutes. The charger was still blinking saying it was not fully charged. So I took it off charge and let it rest for 2 hours. When I tested it again it showed 91% capacity.

I charged the second battery at less then one amp and the charger shut off in 10 minutes. I tested it 30 minutes later and it shows 78% capacity.

I am a bit confused as I do not understand what the correct charging rate should be and if I should leave it at the higher amp rate or just let it stop at a smaller charge?

The 3 amp charge had brought the battery up from 12.9 to 13.3 and was still going. the lower charge rate at less then an amp stops running at 13 volts.

The Analyzer is certified so I guess I do not understand what I should be looking for in a fully charged 7ah battery? Do I trust the smart charger or do I trust the tester?



-Altrez
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Last edited by altrez; 02-15-2019 at 01:16 AM.
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  #4568  
Old 02-15-2019, 04:17 PM
ricards ricards is offline
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altrez,

probably much better not to think the batteries are literal storage of energy..

the charger applies current to the batteries in order to reverse the chemical process done by discharging..

I came to this realization after charging my battery a few years back by about a week by a small pulsing circuit @ 2amps, only to find it not full at the end (13.8v).. it is a bad 70ah battery that is still usable for small loads.. I always wondered where all the energy went to..
Then I thought maybe I wasn't hitting the battery enough with high voltage so I built a larger pulsing circuit and charged the battery again @ 4 amps, overnight It went up over that..
after that I concluded that the battery will not charge no matter how much amperage your charges uses unless you hit it with a certain higher voltage... that it is a 100% chemical process.. and in no way related to the energy you use to charge it..

after reading this thread I see people telling the same thing..

your charger probably is designed only to charge at a certain voltage..
and your batteries though all new, have different conditions..

nice equipment btw..

good luck with the documentation..
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  #4569  
Old 02-15-2019, 04:27 PM
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altrez altrez is online now
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Quote:
Originally Posted by ricards View Post
altrez,

probably much better not to think the batteries are literal storage of energy..

the charger applies current to the batteries in order to reverse the chemical process done by discharging..

I came to this realization after charging my battery a few years back by about a week by a small pulsing circuit @ 2amps, only to find it not full at the end (13.8v).. it is a bad 70ah battery that is still usable for small loads.. I always wondered where all the energy went to..
Then I thought maybe I wasn't hitting the battery enough with high voltage so I built a larger pulsing circuit and charged the battery again @ 4 amps, overnight It went up over that..
after that I concluded that the battery will not charge no matter how much amperage your charges uses unless you hit it with a certain higher voltage... that it is a 100% chemical process.. and in no way related to the energy you use to charge it..

after reading this thread I see people telling the same thing..

your charger probably is designed only to charge at a certain voltage..
and your batteries though all new, have different conditions..

nice equipment btw..

good luck with the documentation..
ricards,

Thank you so much for the post. I do agree with you that its all about the battery's chemistry makeup and finding the right voltage. I am not sure how to test part of it yet so I am trying to get as close to I can of some type of starting point for solid documentation.

The 4 battery's all came from the same supplier and are the same type.

-Altrez
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  #4570  
Old 02-15-2019, 10:34 PM
Iamnuts Iamnuts is offline
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Interesting

EV-Power | Your Complete Power Solutions
https://www.ev-power.eu
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  #4571  
Old 02-15-2019, 11:35 PM
Iamnuts Iamnuts is offline
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New to me.

Apparently these have been around for a long time but they're ne to me.
They look to have a lot of good points, really impressive is the number of
cycles and fast charge ability.

https://en.m.wikipedia.org/wiki/Lith...tanate_battery.
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  #4572  
Old Yesterday, 03:34 PM
Iamnuts Iamnuts is offline
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Impressive.

Wow! I could hardly believe this, could it be true?

1. Extremely Long Lifetime

As discussed above, the advanced nanotechnology consisting of lithium-titanate nanocrystals and their increased surface area are especially designed to enhance the lifetime of these batteries. With an over 30 times larger surface area, this technology is able to recharge substantially faster than its more traditional alternative, the Li-Ion battery. The cycle count of a Lithium Titanate battery is 20,000 in comparison of only 2000 in a regular lithium battery, marking a revolutionary approach to energy storage.
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  #4573  
Old Yesterday, 03:38 PM
Iamnuts Iamnuts is offline
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Second attempt

Chart

http://www.energeticforum.com/attach...1&d=1550331454
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