Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Rush Dougherty via EV]

Hi Marco and all,

You can also use the heat pump for heating/cooling combined with an idea of Lee 
Hart's. Make a cold/hot plate out of coiled copper tubing that the battery pack 
sits on. Sandwich the copper coils between an aluminum plate that the Bat pack 
sits on and an insulating base. And if you really get industrious you can make 
the 
walls of the bat pack out of the heating/cooling plate and even the rows 
separating your batteries.

Rush Dougherty
Tucson AZ 85719


> -Original Message-
> From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco Gaxiola via EV
> Sent: Sunday, April 09, 2017 8:48 PM
> To: Peter C. Thompson; Electric Vehicle Discussion List
> Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)
>
> Ohh those pads looks nice..
>
> Thanks for the advices, Yes, I think cooling the batteries in the summer time 
> won't be a big
> problem (compared to the Arizona's / Sonora's wheater; excessive heat) Since 
> I 
> found the
> average temperature there doesn't go avobe 25°C
>
> my biggest concern was the idea of using the AC as a heat pump, but you have 
> clarified this,
> thanks!
>
>
> Marco Gaxiola
>
> On Sun, Apr 9, 2017 at 8:22 PM, Peter C. Thompson via EV <ev@lists.evdl.org>
> wrote:
>
> > You can also get heating pads designed for lead-acid batteries - these
> > tend to be rugged and acid proof.
> >
> > Example:
> > https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_
> > ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T
> >
> > Cheers, Peter
> >
> >
> > On 4/9/17 9:07 AM, ROBERT via EV wrote:
> >
> >> Why re-invent the wheel.  I have some aircraft NICAD batteries.  They
> >> have a heating pad in each battery box and a thermostat.  Each
> >> battery box has a inlet and outlet for forced air circulation.  Just
> >> buy some of these heating pad.
> >>
> >>
> >> 
> >> From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water
> >> via EV <ev@lists.evdl.org>
> >> Sent: Saturday, April 8, 2017 6:29 PM
> >> To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka Järvinen
> >> Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat
> >> pump)
> >>
> >> Marco,
> >> If you are concerned about battery temp in summer, then you can
> >> always Add a fan that pushes air into the box and an exhaust with
> >> self-closing flap At a high (warm) point that will let air out when
> >> the fan pressurizes the box.
> >>
> >> What others have found is that you try to balance the amount of
> >> insulation Such that the pack will stay warm enough long enough, but
> >> not as much insulation That it will overheat easily, so essentially
> >> you need to estimate how much heat You produce charging and driving
> >> and then size the insulation value accordingly.
> >> If this gives an unrealistic solution then active heating (resistive
> >> typically on Shore power only) and possibly active cooling (just
> >> blowing ambient air through The box, typically, no A/C for batteries
> >> please, we don't need a new EV1.
> >>
> >> Hope this clarifies,
> >> Cor.
> >>
> >> -Original Message-
> >> From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco
> >> Gaxiola via EV
> >> Sent: Saturday, April 08, 2017 10:49 AM
> >> To: Jukka Järvinen
> >> Cc: Electric Vehicle Discussion List
> >> Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat
> >> pump)
> >>
> >> Thanks for the reply...
> >>
> >> its in Norway..
> >>
> >> Thanks for the advice. We've been thinking on a heat pump system, but
> >> not sure if it worths all the complexity of the system to put in the
> >> vehicle considering heat is for sure gonna to be used during winter,
> >> but what about summer time? do they use the AC for colling in the summer?
> >>
> >> Otherwise, just a resistive heating element would be the simplest way
> >> to go?
> >>
> >>
> >> Marco Gaxiola
> >> energyev.com
> >>
> >> On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen
> >> <akkuju...@akkujukka.fi>
> >> wrote:
> >>
> >> What do you consider 'a very cold area in north europe"?
> >>>
> >>> Easy advice for batteries:
> >>> Insulation, insulation, insulation.
> >>>
> >>> :)
>

Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Cor van de Water via EV]

I expect that this means "do not power up the pads when it is not freezing"
But it might be good to find more application documentation.
Cor.

-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Peter C. Thompson via 
EV
Sent: Sunday, April 09, 2017 9:11 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

More research is definitely called for - their notes include this: "Do not use 
when the temperature is above 0C." :(

Cheers, Peter

On 4/9/17 8:47 PM, Marco Gaxiola wrote:
> Ohh those pads looks nice..
>
> Thanks for the advices, Yes, I think cooling the batteries in the 
> summer time won't be a big problem (compared to the Arizona's / 
> Sonora's wheater; excessive heat) Since I found the average 
> temperature there doesn't go avobe 25°C
>
> my biggest concern was the idea of using the AC as a heat pump, but 
> you have clarified this, thanks!
>
>
> Marco Gaxiola
>
> On Sun, Apr 9, 2017 at 8:22 PM, Peter C. Thompson via EV 
> <ev@lists.evdl.org <mailto:ev@lists.evdl.org>> wrote:
>
> You can also get heating pads designed for lead-acid batteries -
> these tend to be rugged and acid proof.
>
> Example:
> 
> https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T
> 
> <https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encodi
> ng=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T>
>
> Cheers, Peter
>
>
> On 4/9/17 9:07 AM, ROBERT via EV wrote:
>
> Why re-invent the wheel.  I have some aircraft NICAD
> batteries.  They have a heating pad in each battery box and a
> thermostat.  Each battery box has a inlet and outlet for
> forced air circulation.  Just buy some of these heating pad.
>
>
> 
> From: EV <ev-boun...@lists.evdl.org
> <mailto:ev-boun...@lists.evdl.org>> on behalf of Cor van de
> Water via EV <ev@lists.evdl.org <mailto:ev@lists.evdl.org>>
>     Sent: Saturday, April 8, 2017 6:29 PM
> To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka
> Järvinen
> Subject: Re: [EVDL] Electric compressor for EV+Battery heating
> (heat pump)
>
> Marco,
> If you are concerned about battery temp in summer, then you
> can always
> Add a fan that pushes air into the box and an exhaust with
> self-closing flap
> At a high (warm) point that will let air out when the fan
> pressurizes the box.
>
> What others have found is that you try to balance the amount
> of insulation
> Such that the pack will stay warm enough long enough, but not
> as much insulation
> That it will overheat easily, so essentially you need to
> estimate how much heat
> You produce charging and driving and then size the insulation
> value accordingly.
> If this gives an unrealistic solution then active heating
> (resistive typically on
> Shore power only) and possibly active cooling (just blowing
> ambient air through
> The box, typically, no A/C for batteries please, we don't need
> a new EV1.
>
> Hope this clarifies,
> Cor.
>
> -Original Message-
> From: EV [mailto:ev-boun...@lists.evdl.org
> <mailto:ev-boun...@lists.evdl.org>] On Behalf Of Marco Gaxiola
> via EV
> Sent: Saturday, April 08, 2017 10:49 AM
> To: Jukka Järvinen
> Cc: Electric Vehicle Discussion List
> Subject: Re: [EVDL] Electric compressor for EV+Battery heating
> (heat pump)
>
> Thanks for the reply...
>
> its in Norway..
>
> Thanks for the advice. We've been thinking on a heat pump
> system, but not sure if it worths all the complexity of the
> system to put in the vehicle considering heat is for sure
> gonna to be used during winter, but what about summer time? do
> they use the AC for colling in the summer?
>
> Otherwise, just a resistive heating element would be the
> simplest way to go?
>
>
> Marco Gaxiola
> energyev.com <http://energyev.com>
>
> On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen
> <akkuju...@akkujukka.fi <mailto:akkuju...@akkujukka.fi>>
> wrote:
>
> What do you consider 'a very cold area in north europe"?
>
> Easy advice for batteries:
> Insula

Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Peter C. Thompson via EV]

More research is definitely called for - their notes include this: "Do 
not use when the temperature is above 0C." :(


Cheers, Peter

On 4/9/17 8:47 PM, Marco Gaxiola wrote:

Ohh those pads looks nice..

Thanks for the advices, Yes, I think cooling the batteries in the 
summer time won't be a big problem (compared to the Arizona's / 
Sonora's wheater; excessive heat) Since I found the average 
temperature there doesn't go avobe 25°C


my biggest concern was the idea of using the AC as a heat pump, but 
you have clarified this, thanks!



Marco Gaxiola

On Sun, Apr 9, 2017 at 8:22 PM, Peter C. Thompson via EV 
<ev@lists.evdl.org <mailto:ev@lists.evdl.org>> wrote:


You can also get heating pads designed for lead-acid batteries -
these tend to be rugged and acid proof.

Example:

https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T

<https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T>

Cheers, Peter


On 4/9/17 9:07 AM, ROBERT via EV wrote:

Why re-invent the wheel.  I have some aircraft NICAD
batteries.  They have a heating pad in each battery box and a
thermostat.  Each battery box has a inlet and outlet for
forced air circulation.  Just buy some of these heating pad.



From: EV <ev-boun...@lists.evdl.org
<mailto:ev-boun...@lists.evdl.org>> on behalf of Cor van de
Water via EV <ev@lists.evdl.org <mailto:ev@lists.evdl.org>>
Sent: Saturday, April 8, 2017 6:29 PM
To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka
    Järvinen
    Subject: Re: [EVDL] Electric compressor for EV+Battery heating
(heat pump)

Marco,
If you are concerned about battery temp in summer, then you
can always
Add a fan that pushes air into the box and an exhaust with
self-closing flap
At a high (warm) point that will let air out when the fan
pressurizes the box.

What others have found is that you try to balance the amount
of insulation
Such that the pack will stay warm enough long enough, but not
as much insulation
That it will overheat easily, so essentially you need to
estimate how much heat
You produce charging and driving and then size the insulation
value accordingly.
If this gives an unrealistic solution then active heating
(resistive typically on
Shore power only) and possibly active cooling (just blowing
ambient air through
The box, typically, no A/C for batteries please, we don't need
a new EV1.

Hope this clarifies,
Cor.

-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org
<mailto:ev-boun...@lists.evdl.org>] On Behalf Of Marco Gaxiola
via EV
Sent: Saturday, April 08, 2017 10:49 AM
To: Jukka Järvinen
Cc: Electric Vehicle Discussion List
    Subject: Re: [EVDL] Electric compressor for EV+Battery heating
(heat pump)

Thanks for the reply...

its in Norway..

Thanks for the advice. We've been thinking on a heat pump
system, but not sure if it worths all the complexity of the
system to put in the vehicle considering heat is for sure
gonna to be used during winter, but what about summer time? do
they use the AC for colling in the summer?

Otherwise, just a resistive heating element would be the
simplest way to go?


Marco Gaxiola
energyev.com <http://energyev.com>

On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen
<akkuju...@akkujukka.fi <mailto:akkuju...@akkujukka.fi>>
wrote:

What do you consider 'a very cold area in north europe"?

Easy advice for batteries:
Insulation, insulation, insulation.

:)

For cabin one can direct charger cooling fan to circulate
air over night.
Most important is to keep moist out as people tend to
cloth themselves
during beach weather (-10C) and when it's actually cold
(-35C and below).
It is pretty unconfortable if cabin is too warm (>+18C).

-Jukka


to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV
<ev@lists.evdl.org <mailto:ev@lists.evdl.org>>
kirjoitti:

 I'm helping a friend to design a conversion
battery pack for a
very cold area in north europe and was wondering if
someone here has
used an electric AC unit as a heat pump, either for
heating up and
comfort of the passe

Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Marco Gaxiola via EV]

Ohh those pads looks nice..

Thanks for the advices, Yes, I think cooling the batteries in the summer
time won't be a big problem (compared to the Arizona's / Sonora's wheater;
excessive heat) Since I found the average temperature there doesn't go
avobe 25°C

my biggest concern was the idea of using the AC as a heat pump, but you
have clarified this, thanks!


Marco Gaxiola

On Sun, Apr 9, 2017 at 8:22 PM, Peter C. Thompson via EV <ev@lists.evdl.org>
wrote:

> You can also get heating pads designed for lead-acid batteries - these
> tend to be rugged and acid proof.
>
> Example:
> https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_
> ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T
>
> Cheers, Peter
>
>
> On 4/9/17 9:07 AM, ROBERT via EV wrote:
>
>> Why re-invent the wheel.  I have some aircraft NICAD batteries.  They
>> have a heating pad in each battery box and a thermostat.  Each battery box
>> has a inlet and outlet for forced air circulation.  Just buy some of these
>> heating pad.
>>
>>
>> 
>> From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via
>> EV <ev@lists.evdl.org>
>> Sent: Saturday, April 8, 2017 6:29 PM
>> To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka Järvinen
>> Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)
>>
>> Marco,
>> If you are concerned about battery temp in summer, then you can always
>> Add a fan that pushes air into the box and an exhaust with self-closing
>> flap
>> At a high (warm) point that will let air out when the fan pressurizes the
>> box.
>>
>> What others have found is that you try to balance the amount of insulation
>> Such that the pack will stay warm enough long enough, but not as much
>> insulation
>> That it will overheat easily, so essentially you need to estimate how
>> much heat
>> You produce charging and driving and then size the insulation value
>> accordingly.
>> If this gives an unrealistic solution then active heating (resistive
>> typically on
>> Shore power only) and possibly active cooling (just blowing ambient air
>> through
>> The box, typically, no A/C for batteries please, we don't need a new EV1.
>>
>> Hope this clarifies,
>> Cor.
>>
>> -Original Message-
>> From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco Gaxiola
>> via EV
>> Sent: Saturday, April 08, 2017 10:49 AM
>> To: Jukka Järvinen
>> Cc: Electric Vehicle Discussion List
>> Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)
>>
>> Thanks for the reply...
>>
>> its in Norway..
>>
>> Thanks for the advice. We've been thinking on a heat pump system, but not
>> sure if it worths all the complexity of the system to put in the vehicle
>> considering heat is for sure gonna to be used during winter, but what about
>> summer time? do they use the AC for colling in the summer?
>>
>> Otherwise, just a resistive heating element would be the simplest way to
>> go?
>>
>>
>> Marco Gaxiola
>> energyev.com
>>
>> On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen <akkuju...@akkujukka.fi>
>> wrote:
>>
>> What do you consider 'a very cold area in north europe"?
>>>
>>> Easy advice for batteries:
>>> Insulation, insulation, insulation.
>>>
>>> :)
>>>
>>> For cabin one can direct charger cooling fan to circulate air over night.
>>> Most important is to keep moist out as people tend to cloth themselves
>>> during beach weather (-10C) and when it's actually cold (-35C and below).
>>> It is pretty unconfortable if cabin is too warm (>+18C).
>>>
>>> -Jukka
>>>
>>>
>>> to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV
>>> <ev@lists.evdl.org>
>>> kirjoitti:
>>>
>>>  I'm helping a friend to design a conversion battery pack for a
>>>> very cold area in north europe and was wondering if someone here has
>>>> used an electric AC unit as a heat pump, either for heating up and
>>>> comfort of the passengers on board, as well; and most important; to
>>>> keep the battery pack warm enough on blow freezing temperatures.
>>>>
>>>> Marco Gaxiola
>>>> energyev.com
>>>> -- next part -- An HTML attachment was
>>>> scrubbed...
>>>> URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/
>>>> attachments/20170406/51844

Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Peter C. Thompson via EV]

You can also get heating pads designed for lead-acid batteries - these 
tend to be rugged and acid proof.


Example:
https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8=ECZS9XXRJF00=I1DAV5PWDDSP7T

Cheers, Peter

On 4/9/17 9:07 AM, ROBERT via EV wrote:

Why re-invent the wheel.  I have some aircraft NICAD batteries.  They have a 
heating pad in each battery box and a thermostat.  Each battery box has a inlet 
and outlet for forced air circulation.  Just buy some of these heating pad.



From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via EV 
<ev@lists.evdl.org>
Sent: Saturday, April 8, 2017 6:29 PM
To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka Järvinen
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

Marco,
If you are concerned about battery temp in summer, then you can always
Add a fan that pushes air into the box and an exhaust with self-closing flap
At a high (warm) point that will let air out when the fan pressurizes the box.

What others have found is that you try to balance the amount of insulation
Such that the pack will stay warm enough long enough, but not as much insulation
That it will overheat easily, so essentially you need to estimate how much heat
You produce charging and driving and then size the insulation value accordingly.
If this gives an unrealistic solution then active heating (resistive typically 
on
Shore power only) and possibly active cooling (just blowing ambient air through
The box, typically, no A/C for batteries please, we don't need a new EV1.

Hope this clarifies,
Cor.

-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco Gaxiola via EV
Sent: Saturday, April 08, 2017 10:49 AM
To: Jukka Järvinen
Cc: Electric Vehicle Discussion List
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

Thanks for the reply...

its in Norway..

Thanks for the advice. We've been thinking on a heat pump system, but not sure 
if it worths all the complexity of the system to put in the vehicle considering 
heat is for sure gonna to be used during winter, but what about summer time? do 
they use the AC for colling in the summer?

Otherwise, just a resistive heating element would be the simplest way to go?


Marco Gaxiola
energyev.com

On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen <akkuju...@akkujukka.fi>
wrote:


What do you consider 'a very cold area in north europe"?

Easy advice for batteries:
Insulation, insulation, insulation.

:)

For cabin one can direct charger cooling fan to circulate air over night.
Most important is to keep moist out as people tend to cloth themselves
during beach weather (-10C) and when it's actually cold (-35C and below).
It is pretty unconfortable if cabin is too warm (>+18C).

-Jukka


to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV
<ev@lists.evdl.org>
kirjoitti:


 I'm helping a friend to design a conversion battery pack for a
very cold area in north europe and was wondering if someone here has
used an electric AC unit as a heat pump, either for heating up and
comfort of the passengers on board, as well; and most important; to
keep the battery pack warm enough on blow freezing temperatures.

Marco Gaxiola
energyev.com
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Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[ROBERT via EV]

Why re-invent the wheel.  I have some aircraft NICAD batteries.  They have a 
heating pad in each battery box and a thermostat.  Each battery box has a inlet 
and outlet for forced air circulation.  Just buy some of these heating pad.



From: EV <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via EV 
<ev@lists.evdl.org>
Sent: Saturday, April 8, 2017 6:29 PM
To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka Järvinen
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

Marco,
If you are concerned about battery temp in summer, then you can always
Add a fan that pushes air into the box and an exhaust with self-closing flap
At a high (warm) point that will let air out when the fan pressurizes the box.

What others have found is that you try to balance the amount of insulation
Such that the pack will stay warm enough long enough, but not as much insulation
That it will overheat easily, so essentially you need to estimate how much heat
You produce charging and driving and then size the insulation value accordingly.
If this gives an unrealistic solution then active heating (resistive typically 
on
Shore power only) and possibly active cooling (just blowing ambient air through
The box, typically, no A/C for batteries please, we don't need a new EV1.

Hope this clarifies,
Cor.

-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco Gaxiola via EV
Sent: Saturday, April 08, 2017 10:49 AM
To: Jukka Järvinen
Cc: Electric Vehicle Discussion List
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

Thanks for the reply...

its in Norway..

Thanks for the advice. We've been thinking on a heat pump system, but not sure 
if it worths all the complexity of the system to put in the vehicle considering 
heat is for sure gonna to be used during winter, but what about summer time? do 
they use the AC for colling in the summer?

Otherwise, just a resistive heating element would be the simplest way to go?


Marco Gaxiola
energyev.com

On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen <akkuju...@akkujukka.fi>
wrote:

> What do you consider 'a very cold area in north europe"?
>
> Easy advice for batteries:
> Insulation, insulation, insulation.
>
> :)
>
> For cabin one can direct charger cooling fan to circulate air over night.
> Most important is to keep moist out as people tend to cloth themselves
> during beach weather (-10C) and when it's actually cold (-35C and below).
> It is pretty unconfortable if cabin is too warm (>+18C).
>
> -Jukka
>
>
> to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV
> <ev@lists.evdl.org>
> kirjoitti:
>
>> I'm helping a friend to design a conversion battery pack for a
>> very cold area in north europe and was wondering if someone here has
>> used an electric AC unit as a heat pump, either for heating up and
>> comfort of the passengers on board, as well; and most important; to
>> keep the battery pack warm enough on blow freezing temperatures.
>>
>> Marco Gaxiola
>> energyev.com
>> -- next part -- An HTML attachment was
>> scrubbed...
>> URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/
>> attachments/20170406/51844c9c/attachment.htm>
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Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Cor van de Water via EV]

Marco,
If you are concerned about battery temp in summer, then you can always
Add a fan that pushes air into the box and an exhaust with self-closing flap
At a high (warm) point that will let air out when the fan pressurizes the box.

What others have found is that you try to balance the amount of insulation
Such that the pack will stay warm enough long enough, but not as much insulation
That it will overheat easily, so essentially you need to estimate how much heat
You produce charging and driving and then size the insulation value accordingly.
If this gives an unrealistic solution then active heating (resistive typically 
on
Shore power only) and possibly active cooling (just blowing ambient air through
The box, typically, no A/C for batteries please, we don't need a new EV1.

Hope this clarifies,
Cor.

-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Marco Gaxiola via EV
Sent: Saturday, April 08, 2017 10:49 AM
To: Jukka Järvinen
Cc: Electric Vehicle Discussion List
Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

Thanks for the reply...

its in Norway..

Thanks for the advice. We've been thinking on a heat pump system, but not sure 
if it worths all the complexity of the system to put in the vehicle considering 
heat is for sure gonna to be used during winter, but what about summer time? do 
they use the AC for colling in the summer?

Otherwise, just a resistive heating element would be the simplest way to go?


Marco Gaxiola
energyev.com

On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen <akkuju...@akkujukka.fi>
wrote:

> What do you consider 'a very cold area in north europe"?
>
> Easy advice for batteries:
> Insulation, insulation, insulation.
>
> :)
>
> For cabin one can direct charger cooling fan to circulate air over night.
> Most important is to keep moist out as people tend to cloth themselves 
> during beach weather (-10C) and when it's actually cold (-35C and below).
> It is pretty unconfortable if cabin is too warm (>+18C).
>
> -Jukka
>
>
> to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV 
> <ev@lists.evdl.org>
> kirjoitti:
>
>> I'm helping a friend to design a conversion battery pack for a 
>> very cold area in north europe and was wondering if someone here has 
>> used an electric AC unit as a heat pump, either for heating up and 
>> comfort of the passengers on board, as well; and most important; to 
>> keep the battery pack warm enough on blow freezing temperatures.
>>
>> Marco Gaxiola
>> energyev.com
>> -- next part -- An HTML attachment was 
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>> group/NEDRA)
>>
>>
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Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Marco Gaxiola via EV]

Thanks for the reply...

its in Norway..

Thanks for the advice. We've been thinking on a heat pump system, but not
sure if it worths all the complexity of the system to put in the vehicle
considering heat is for sure gonna to be used during winter, but what about
summer time? do they use the AC for colling in the summer?

Otherwise, just a resistive heating element would be the simplest way to go?


Marco Gaxiola
energyev.com

On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen 
wrote:

> What do you consider 'a very cold area in north europe"?
>
> Easy advice for batteries:
> Insulation, insulation, insulation.
>
> :)
>
> For cabin one can direct charger cooling fan to circulate air over night.
> Most important is to keep moist out as people tend to cloth themselves
> during beach weather (-10C) and when it's actually cold (-35C and below).
> It is pretty unconfortable if cabin is too warm (>+18C).
>
> -Jukka
>
>
> to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV 
> kirjoitti:
>
>> I'm helping a friend to design a conversion battery pack for a very
>> cold area in north europe and was wondering if someone here has used an
>> electric AC unit as a heat pump, either for heating up and comfort of the
>> passengers on board, as well; and most important; to keep the battery pack
>> warm enough on blow freezing temperatures.
>>
>> Marco Gaxiola
>> energyev.com
>> -- next part --
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>> URL: > attachments/20170406/51844c9c/attachment.htm>
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>> Read EVAngel's EV News at http://evdl.org/evln/
>> Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/
>> group/NEDRA)
>>
>>
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Re: [EVDL] Electric compressor for EV+Battery heating (heat pump)

[Jukka Järvinen via EV]

What do you consider 'a very cold area in north europe"?

Easy advice for batteries:
Insulation, insulation, insulation.

:)

For cabin one can direct charger cooling fan to circulate air over night.
Most important is to keep moist out as people tend to cloth themselves
during beach weather (-10C) and when it's actually cold (-35C and below).
It is pretty unconfortable if cabin is too warm (>+18C).

-Jukka


to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV 
kirjoitti:

> I'm helping a friend to design a conversion battery pack for a very
> cold area in north europe and was wondering if someone here has used an
> electric AC unit as a heat pump, either for heating up and comfort of the
> passengers on board, as well; and most important; to keep the battery pack
> warm enough on blow freezing temperatures.
>
> Marco Gaxiola
> energyev.com
> -- next part --
> An HTML attachment was scrubbed...
> URL: <
> http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170406/51844c9c/attachment.htm
> >
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> Read EVAngel's EV News at http://evdl.org/evln/
> Please discuss EV drag racing at NEDRA (
> http://groups.yahoo.com/group/NEDRA)
>
>
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[EVDL] Electric compressor for EV+Battery heating (heat pump)

[Marco Gaxiola via EV]

I'm helping a friend to design a conversion battery pack for a very
cold area in north europe and was wondering if someone here has used an
electric AC unit as a heat pump, either for heating up and comfort of the
passengers on board, as well; and most important; to keep the battery pack
warm enough on blow freezing temperatures.

Marco Gaxiola
energyev.com
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