There is quite a bit of information here,
http://liionbms.com/php/bms_options.php
and here,
http://liionbms.com/php/bms-selector.php
http://liionbms.com/php/battery_modules.php
This is the main page that has several different categories listed, including
motor controls
On Jul 24, 2014, at 5:54 AM, Rod Hower rodho...@ameritech.net wrote:
This is the main page that has several different categories listed, including
motor controls
http://liionbms.com/php/index.php
Wow -- that is an amazing resource, one that'll keep me quite busy for a while.
Thanks!
b
On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV ev@lists.evdl.org
wrote:
For example, the CALB 40ah cells I mentioned are rated for a maximum
discharge of 2C (80 amps). At 144v, 80a is 11.5kW. Allowing for losses,
that's only about 12hp from your motor!
I think I may be a bit
Amps add in parallel, volts add in series.
Given your assumptions, you can put 45 of those 40Ah cells can produce
3.2v at 3600A if you arrange them in parallel, but 80 A at 144V if you
arrange them in series. But you can't have your cake and eat it too
and get 3600A at 144V...
On Thu, Jul 24,
Ben,
I'm not an engineer but I don't think you can add up the amps in a series
configuration. If the batteries are connected in series, the same current
flows through all of them at the same time (it doesn't spread out the
current load). Think of a chain is only as strong as its weakest link -
Vehicle Discussion List
Subject: Re: [EVDL] How crazy am I?
On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV
ev@lists.evdl.org wrote:
For example, the CALB 40ah cells I mentioned are rated for a maximum
discharge of 2C (80 amps). At 144v, 80a is 11.5kW. Allowing for
losses,
that's only
: http://www.cvandewater.info
Skype: cor_van_de_water Tel: +1 408 383 7626
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Ben Goren via
EV
Sent: Thursday, July 24, 2014 2:38 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] How crazy am I
p.m.
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] How crazy am I?
Another factor to consider is that while power capability varies by design,
as a general rule, smaller cells are usually capable of lower power output.
For example, the CALB 40ah cells I mentioned are rated for a maximum
On Jul 22, 2014, at 7:47 PM, EVDL Administrator via EV ev@lists.evdl.org
wrote:
On 22 Jul 2014 at 10:24, Ben Goren via EV wrote:
Wikipedia says curb weight is 2,445. I don't see this ending up at 3,500
after
conversion...but I also like estimating pessimistically.
I see that too. But
On Jul 23, 2014, at 3:45 AM, Ben Apollonio via EV ev@lists.evdl.org wrote:
On the contrary. Tesla cells discharge at a very LOW current. When you have
85kWh of battery, you only need 3.5C to make 300kW, and C/5 to cruise at
55MPH. Even the 120kW 'supercharger' tops out at about 2C (for
David,
I can corroborate your numbers on pack sizing. You pretty much summed up my
conversion. I have 45 cells of ThunderSky 100Ah cells in a Honda del Sol for a
nominal 144V pack and 13 kWh. In that car, I have a 50 mile range (barely).
When new, I drove it 46 miles without issues, but I
Another factor to consider is that while power capability varies by design,
as a general rule, smaller cells are usually capable of lower power output.
For example, the CALB 40ah cells I mentioned are rated for a maximum
discharge of 2C (80 amps). At 144v, 80a is 11.5kW. Allowing for losses,
The discharge rate of the cells should play into the calculations as well. If
the cells have a 3C max rate, 45 90 ah cells could produce about 52 HP (270
amps max@144v), resulting in a somewhat underpowered vehicle.
How much does exceeding the discharge rate reduce the life of the pack? Is
I would consider my ThunderSky cells as 1C normal draw with bursts of 2C or
maybe a little more. I have rarely seen 3C even in the best conditions. If
they are cold, don't even expect 2C.
They work OK, but they are not a high performance pack.
Mike
On July 22, 2014 2:20:42 AM MDT, EVDL
I assumed people know, but guess I should specifically point out that
ThunderSky is the previous name for the company now known as Winston. I don't
know how much their chemistry varies between the two company names.
My cells are more than 4 years old, so it is quite possible for new cells to
On 07/22/2014 08:29 AM, Mike Nickerson via EV wrote:
I would consider my ThunderSky cells as 1C normal draw with bursts of 2C or
maybe a little more. I have rarely seen 3C even in the best conditions. If
they are cold, don't even expect 2C.
With my ~2008 vintage TS-LFP260s, I can pull at
On Jul 21, 2014, at 10:21 PM, EVDL Administrator via EV ev@lists.evdl.org
wrote:
On 21 Jul 2014 at 14:12, Ben Goren via EV wrote:
I'm really only looking for a battery pack big enough for local trips;
a couple dozen miles would be plenty. I suspect that the smallest pack
that puts out the
On Tue Jul 22 10:24:59 PDT 2014 ev@lists.evdl.org said:
How about CALB? The smallest one EVSource sells (that's not an endorsement,
it's just one place I found offering them online) is 40ah.
That's actually what I was using for my own back-of-the-envelope calculations,
but from EVWest's site.
On Jul 22, 2014, at 1:20 AM, EVDL Administrator via EV ev@lists.evdl.org
wrote:
Another factor to consider is that while power capability varies by design,
as a general rule, smaller cells are usually capable of lower power output.
Um. I was unaware that that was something that needed to be
On 07/22/2014 12:33 PM, John Lussmyer via EV wrote:
Have you thought about Leaf modules? That's what I'm using in my
truck.
http://hybridautocenter.com/HAC4/index.php?option=com_hikashopctrl=producttask=showcid=4name=new-11kw-h-battery-block-182v-60ahItemid=605
-- Try my
What are the BMS
Ben, Consider the Micro-hybrid with a electric motorcycle motor belt
driven from a belt from the harmonic balancer in the front end of the crank
of the ICE and placed in the location of the original alternator. The
electric motor is used to start the ICE after pausing and eliminates the
need to
On 22 Jul 2014 at 10:24, Ben Goren via EV wrote:
Wikipedia says curb weight is 2,445. I don't see this ending up at 3,500 after
conversion...but I also like estimating pessimistically.
I see that too. But that's probably for an early 170 six with 3-speed stick
and no options. Remember, in
David,
Thanks for your detailed and thoughtful analysis! I *think* I'm dodging most of
the worst pitfalls you caution against. Specifically:
The result is that your hybrid isn't going to be optimized as either an ICEV
or an EV. It's likely that its EV range will be less than a similar
On Jul 19, 2014, at 2:58 PM, Dennis Miles via EV ev@lists.evdl.org wrote:
On the question, I have an opinion. The only very successful Real Hybrid
conversions have been those which replace the ICE with a smaller unit and
transmission and added an Electric (AC) Motor.
May I ask...what do you
On 21 Jul 2014 at 14:12, Ben Goren via EV wrote:
I'm really only looking for a battery pack big enough for local trips;
a couple dozen miles would be plenty. I suspect that the smallest pack
that puts out the necessary voltage is going to be just about the
right size ...
Hmm. Maybe. Let's
, July 21, 2014 2:12 PM
To: EVDL Administrator; Electric Vehicle Discussion List
Subject: Re: [EVDL] How crazy am I?
David,
Thanks for your detailed and thoughtful analysis! I *think* I'm dodging
most of the worst pitfalls you caution against. Specifically:
The result is that your hybrid isn't
Ben,
Sounds like a fun project that surely would be possible. Probably complex,
but surely possible!
I can comment about owning a conversion in Phoenix as this is the third
summer I've had my EV on the road (http://evalbum.com/2358). My pack is
large, 45x CALB 180's and is in the trunk. I
On Mon Jul 21 22:23:18 PDT 2014 ev@lists.evdl.org said:
Someone on this list did a Ford F-350 IIRC and I am not sure if that was
a straight EV, my memory seems to suggest that he added an electric
motor
in between engine and driveshaft (transmission?), just like you are
planning. I believe it was
Hi Ben,
I'm a little surprised at the light response you've gotten to your question.
I would have thought there'd be more folks here who at least have put some
thought into homebrewing a hybrid this way, if not done it themselves.
So, even though I'm about the worst person to do so since I'm a
-Jul-14 1:16:45 PM
Subject: Re: [EVDL] How crazy am I?
Hi Ben,
I'm a little surprised at the light response you've gotten to your
question.
I would have thought there'd be more folks here who at least have put
some
thought into homebrewing a hybrid this way, if not done it themselves.
So, even
For quite some time, I've had vague plans of getting an electric vehicle of
some sort. When I put the solar array on my roof a couple years ago, I
intentionally oversized it so I'd have enough extra to charge a car and still
have (roughly, of course) net zero electric use.
Until recently, the
did back in the 80's.
Roland
- Original Message -
From: Ben Goren via EVmailto:ev@lists.evdl.org
To: ev@lists.evdl.orgmailto:ev@lists.evdl.org
Sent: Thursday, July 17, 2014 9:58 PM
Subject: [EVDL] How crazy am I?
For quite some time, I've had vague plans of getting
transmission, you than could
use engine vacuum load sensors like I did back in the 80's.
Roland
- Original Message -
From: Ben Goren via EV
To: ev@lists.evdl.org
Sent: Thursday, July 17, 2014 9:58 PM
Subject: [EVDL] How crazy am I?
For quite some time, I've had vague plans
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