Gel Battery

[bobk]

PM for you Terry,
Bobk

[Dot]

Good evening Mr K, how's your knee doing? So you survived the Mr's K's cooking ?

[T1 Terry]

Musta held ya mouth wrong or sometin' cause I didn't get your PM, might need to try again. Unless you sent it to Margaret, I'll ask her to have a look in her inbox

T1 Terry

[bobk]

Still holding my mouth wrong as I wrote a bloody treatise and the damned internet dropped off and I lost it. Suck, Duck and Muck. Hello Dot, yes, the knee is improving, I’m doing hydrotherapy and gym work. And mrsk is currently in the kitchen cooking an apple cake for a picnic lunch tomorrow at the beach!! She loves me!! Terry, after a bit of mucking about I decided to buy a device to capacity test the battery. I pre-charged the battery using a multi stage charger on the Recondition setting at 6A. Using a driving light as load, the capacity test started at 12.78V 4.68A and concluded at 5 hours 40 min 11.89V 4.45A. I believe you said not to take the battery below 11.9V, so using those parameters the battery capacity is only about 26% and obviously not enough. I regret now not accepting the offer made when we were talking. Ke sera. A rethink is required which you could perhaps help with. You may like to PM me if you have a suggestion, and I will figure it out (the PM system).
Regards bobk

[T1 Terry]

Still holding my mouth wrong as I wrote a bloody treatise and the damned internet dropped off and I lost it. Suck, Duck and Muck. Hello Dot, yes, the knee is improving, I’m doing hydrotherapy and gym work. And mrsk is currently in the kitchen cooking an apple cake for a picnic lunch tomorrow at the beach!! She loves me!! Terry, after a bit of mucking about I decided to buy a device to capacity test the battery. I pre-charged the battery using a multi stage charger on the Recondition setting at 6A. Using a driving light as load, the capacity test started at 12.78V 4.68A and concluded at 5 hours 40 min 11.89V 4.45A. I believe you said not to take the battery below 11.9V, so using those parameters the battery capacity is only about 26% and obviously not enough. I regret now not accepting the offer made when we were talking. Ke sera. A rethink is required which you could perhaps help with. You may like to PM me if you have a suggestion, and I will figure it out (the PM system).
Regards bobk

I'll charge and test another battery for you if you like, or you can put the $$ towards a 100Ah battery built from second hand cells out of my Blade. They were still doing the job in the Blade, I just wanted to do the LTO cell upgrade ...... because ...... I've got them sitting in a box? maybe

T1 Terry

[bobk]

Thanks Terry, if you search out a better battery, that may be best. I must say I do like a lot the thought of the lighter weight battery, however I don't know if the proposal is a set-and-forget option considering the technology, and I don't know what the peripheral costs would be, like a dc-dc charger due to needing a higher voltage, and/or whether my folding panel and pwm controller would be adequate. It's all a big question mark.
bobk

[T1 Terry]

Thanks Terry, if you search out a better battery, that may be best. I must say I do like a lot the thought of the lighter weight battery, however I don't know if the proposal is a set-and-forget option considering the technology, and I don't know what the peripheral costs would be, like a dc-dc charger due to needing a higher voltage, and/or whether my folding panel and pwm controller would be adequate. It's all a big question mark.
bobk

Umm, the DC to DC for a lithium battery is to protect the alternator because a lithium battery will drag all it can get, you need the DC to DC higher voltage to charge a lead acid battery of any sort via the alternator if more than a mtr of cabling is involved. Alternators these days don't charge to the 14.4v to 14.8v required to recharge a lead acid battery, because that would boil off the electrolyte in the flooded cell start battery and they no longer have screw caps to replace the lost water .....
I'll check out the pile of AGM's up the back and see what I can find.

T1 Terry

[bobk]

That's a plan, thank you. As an aside, the vehicle is a 2010 Isuzu and I don't believe it has a smart alternator. I have checked it with engine running after driving for some time and the voltage was 14.1V.

[native pepper]

I'll charge and test another battery for you if you like, or you can put the $$ towards a 100Ah battery built from second hand cells out of my Blade. They were still doing the job in the Blade, I just wanted to do the LTO cell upgrade ...... because ...... I've got them sitting in a box? maybe

T1 Terry

Have you installed LTO cells yet Terry, would be interested to hear how you have found them in the Blade compared to lifepo4, or Li-ion which ever you used.

[T1 Terry]

I'll charge and test another battery for you if you like, or you can put the $$ towards a 100Ah battery built from second hand cells out of my Blade. They were still doing the job in the Blade, I just wanted to do the LTO cell upgrade ...... because ...... I've got them sitting in a box? maybe

T1 Terry

Have you installed LTO cells yet Terry, would be interested to hear how you have found them in the Blade compared to lifepo4, or Li-ion which ever you used.

The cells that came out were Winston LFP (lithium ferrous phosphate or LiFeP04) but time has not been on my side to get the LTO cells into the Blade ..... I did get as far as getting one out of the box to look at it and measure it into where I wanted to fit them, but nothing past that.

T1 Terry