a
> EV
> Sent: Thursday, July 24, 2014 2:38 PM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] How crazy am I?
>
> On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV
> wrote:
>
>> For example, the CALB 40ah cells I mentioned are rated for a maximum
Vehicle Discussion List
Subject: Re: [EVDL] How crazy am I?
On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV
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 o
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" -
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, 201
On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV
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 confused.
If a singl
On Jul 24, 2014, at 5:54 AM, Rod Hower 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&
-- next par
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
http://liionbms.com/php/i
On Jul 23, 2014, at 3:45 AM, Ben Apollonio via EV 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 the smaller
> 60
On Jul 22, 2014, at 7:47 PM, EVDL Administrator via EV
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 that's p
On Jul 22, 2014, at 12:06 PM, Dennis Miles wrote:
> 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.
That was actually the ori
our hand
> around.
>
> -Original Message-
> From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of EVDL Administrator
> via EV
> Sent: Tuesday, 22 July 2014 8:21 p.m.
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] How crazy am I?
>
> Ano
8:21 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 ma
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
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 i
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_hikashop&ctrl=product&task=show&cid=4&name=new-11kw-h-battery-block-182v-60ah&Itemid=605
-- Try my
What are the BMS
On Jul 22, 2014, at 1:20 AM, EVDL Administrator via EV
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 taken into
cons
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
On Jul 21, 2014, at 10:21 PM, EVDL Administrator via EV
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 necessary
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 lea
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
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 Admin
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
th
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,
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
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
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 just
, 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 hybr
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. Le
On Jul 19, 2014, at 2:58 PM, Dennis Miles via EV 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 mean by both
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 BEV'
ill need it for running the dash accessories, etc.
>
> Peri
>
>
> ------ Original Message --
> From: "EVDL Administrator via EV"
> To: "Electric Vehicle Discussion List"
> Sent: 19-Jul-14 1:16:45 PM
> Subject: Re: [EVDL] How crazy am I?
>
>
t: 19-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 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 though I'm about the worst person to do so since I'm a
Roland,
Thanks for all the detailed information. At the least, it's good to know that
the basic idea isn't *completely* nuts.
I think I'm looking for something a bit simpler from a mechanical and
engineering perspective -- keep the Mustang's engine and transmission basically
unmodified, and us
Hello Ben,
I have done this method of connecting a motor to a engine back in 1980. The
motor was between the engine and the transmission. The transmission was a GM
TH-400 automatic with a manual valve body, so I can selected the gear manually
right at the sweet spot of a 11 inch motor.
Th
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