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Post by vmrod on Apr 1, 2009 14:57:20 GMT -3
I believe these cells are used in LifeBatts, but not really sure.
They have 144V 10aH packs. They also have chargers, BMS, and are ready to ship now. They will also make a custom size for you.
Their new 'Red Cell' will ship out this year. I wonder what specs that has?
Anyway this looks promising.
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Post by vmrod on May 9, 2009 22:30:28 GMT -3
So far, I can easily cram enough batts to give me a great voltage (168V) and a decent aH. I want to be able to start out at 10aH in the tunnel (just for testing the system), but be able to easily add predesigned packs to increase the aH in factors of 10. 40aH is my target goal. 60+ would be better. Here's a current design pic...
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Post by vmrod on May 12, 2009 22:35:00 GMT -3
The battery layout has been reworked. I'll post a pic later. 5 battery banks (168v - 10aH each) can be installed. It is designed for the following;
1. Battery pack (BP) #1 gets installed in the tunnel. This will be used for testing the vehicle.
2. BP #2 & #3 gets installed in the front area. With these 3 packs, a 30 mile range should be achievable.
3. BP #4 can be installed at any time after step #2 above. This pack is actually broken into smaller packs located in the front area, and also 16 extra cells in the tunnel area. These mini packs are wired in series with each other to achieve 168V.
4. BP #5 can also be installed at any time after step #2 above. this pack consists of a large pack located right over the motor and 2 small packs located under and to the side of the motor. These 3 packs are also wired in series to achieve 168V.
I spoke with the engineer at BMI, and he said that the battery management modules can be located away from the cells. This means the BMS can be installed in the rear compartment, or anywhere I desire.
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Post by vmrod on May 15, 2009 22:03:00 GMT -3
Allright, here is that pic. I also posted it in the construction blog, so don't feel short-changed if you see the same picture again. I posted a pic of the VMS (voltage monitoring system) cards there too. However I won't repost the pic here, cuz someone will just accuse me of double-posting stuff, just to look like I am really super busy.
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Post by bbonewibb on Jun 4, 2009 11:58:32 GMT -3
Whoa, that is really cool!
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Post by vmrod on Feb 18, 2010 17:40:02 GMT -3
Well, I thought really hard about it, and decided that it probably isn't worth the trouble and time to repack all of those cells into my own boxes. I've played with the various battery sizes and came up with something that I can test-out, then expand to the configuration like the pic, then add another pack or possibly 2. Since I would be using the standard battery pack, the VMS is built in and I won't have to do anything but wire it up! The A/C compressor got modelled today, and there is just enough room to squeeze it in with this pack configuration. It is in the rear of the tunnel. The battery packs can now be ordered in 15aH, something to consider.
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Post by vmrod on Jun 5, 2010 22:04:52 GMT -3
Getting pricing right now on the batts. Currently looking to order the following: (2) 72VDC - 15aH XPS2E-series (1) 12VDC - 15aH XPS2E-series and (1) 156VDC batter charger (120VAC/15amps input) The batts will get wired in series, so as to provide 156VDC-15aH. This should provide for roughly 15+ miles of travel. Plenty enough for testing. This is the website where I am getting them. lithbattoz.com.au/ If I am delighted with the performance, I may ask to distribute them in the USA. Wouldn't you rather buy from an experienced person, than someone that is just a 'drop-shipper'?
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Post by vmrod on Jun 6, 2010 15:16:16 GMT -3
The battery pack will be right under $4,200 shipped to my door. This is for a 156VDC - 15aH pack. This purchase will be made in a couple weeks. Although it sounds very costly, in the long run, it will pay off greatly. I should be getting a discount for the next 2 packs. Would be nice!
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Post by vmrod on Jun 17, 2010 8:24:41 GMT -3
I decided to up the pack voltage to 168V. This is achieved by connecting a 72V and 96V battery in series. I will not go higher for this application. At least not now.
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Post by vmrod on Jul 12, 2010 20:05:17 GMT -3
Look what the nice UPS man dropped off today! ;D ;D ;D
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Post by vmrod on Jul 26, 2010 19:59:49 GMT -3
Since I am unsure of these batteries, I need to put them through some sort of test. The voltage seems easy enough to check, a no brainer there. What I would really like to see, is how many amps are being delivered to the controller.
The Cycle-Analysis is supposed to show me a true reading on how many amps are flowing through the system at any given time. Well, how do you verify that? I checked the programming parameters on the Cycle-Analysis, and everything is fine there. I even did the math myself to make sure the reading was correct.
Test #1 - Road Trip around the block: The highest amps recorded on the e-meter was 40 amps and the Zilla was set for 100amps max for both the battery and the motor. Max motor voltage was set at 160V. (My pack is 168Volt nominal, but is delivering 187Volts right now) The car performed allright, but with junior electric car performance. I don't know why the e-motor showed 40amps when the max limits were twice as high. Was the battery not delivering? The voltage was not sagging during the times of maximum usage either. (If so, it was hardly at all)
Test #2 - Pull into garage and tweak Zilla: Bumped up the max motor and battery amp settings on the Zilla to 150amps. There was a nice difference here. Still not what I had hoped for, but a nice taste. A run up and down the street recorded a max of 51.2 amps on the e-meter. Again, I expected a higher amp draw. The battery showed little (if any) voltage sag.
Test #3 - today in the garage. So I thought about it and thought I would bump up the settings again. I adjusted the max battery amps to 225 (max per manufacturer), and 300amps on the motor. I also set the motor to 165volts. Wow! What a difference! A quick push on the pedal and the tires chirped in reverse, first gear, and even second gear! This is the power I had hoped for, and so far it comes from only the first battery pack! After this fun test, I brought the settings all back down to 100amp max for motor and battery pack, and the motor voltage to 160. The motor should get broke-in at 100amps for a bit before it gets pushed to higher amps. (Something about the brushes getting worn-in.)
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Post by vmrod on Sept 7, 2010 9:29:17 GMT -3
Road testing is going great. Although I have achieved 190WH/mile during neighborhood driving, and 220WH/mile for slightly spirited neighborhood driving, I'll have to predict that 250WH/mile is what this vehicle will be seeing. This should take into acount a completed body, and also higher speeds. If you are building an EV and can afford these batts, then by all means, jump on them. The power they can dish out is amazing! Since they have relatively low Ah ratings, you will need more of them to increase your range. It will get expensive to say the least, but these are, hands down, extremly powerful batteries! While the VMS (voltage monitoring system) is included inside the battery, it is still a little akward in getting useful signals out of the battery without extra equipment. Also after rebuilding one of my batteries and having to take apart the other one, I am having problems with a couple of the VMS boards. Hopefully this is something that can be remedied easy later on. I do not like the idea of taking these packs apart again. (Fortunately, getting to the VMS boards only requires a few screws to be removed.)
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Post by vmrod on Oct 4, 2010 8:28:23 GMT -3
What fun what fun! I have done a wire transfer for the second set of batteries, and guess what? The funds are not seen on the receiving end!!!! They were taken from my account all right, but where did it go? A trace will be put on it today, and we'll see what comes up. Wow! I hope I don't have to go through this when I get the other half of batteries! Paypal or a credit card would be nice to pay with!
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Post by onebadz on Oct 4, 2010 16:22:30 GMT -3
It looks good Little Man! Good luck with the transaction.
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Post by vmrod on Oct 7, 2010 13:14:48 GMT -3
Figured it all out! The bank had left off a piece of info, and the transfer was cancelled.
It was resent today!
Hiya Onebadz!
** edit **
The funds have been confirmed as sent! Woohoo!
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