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My Mutiple Battery charger
2302 18 2015-3-27
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TagTracking
lvl.3

Canada
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IMG_4466.JPG

IMG_4467.JPG

IMG_4468.JPG

Top view

Top view

Top no batt

Top no batt


2015-3-27
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genettico.hotma
lvl.4

United States
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Cool idea. Thanks  for sharing!
2015-3-27
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dundee
Captain
Flight distance : 33550 ft

Thailand
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Hi TagTracking, where did you find these 3 battery holsters mounted in your toolbox? Thanks
2015-3-27
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Colonel Angus
Second Officer

United States
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Dundee  they look the same as what is sitting on my desk.
They are the battery heaters used as holsters! I'm looking at one right now and they are identical, but there is no interface but the top pins for the battery to mount to when inserted. This gent must have drilled and tapped into the wiring thru the plastic casing ..Interesting ...But how??
Ah ha......... I just spied tiny screws at the bottom of the battery heater to separate the casing..
2015-3-27
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TagTracking
lvl.3

Canada
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Colonel Angus is right, these are the battery warmer that I've used in a Plano munition box. The box is weather tight, very nice box but I would have prefered a black one...Curently have 3 batteries but left room for a forth one. I've charged all batteries at the same time and have no heat problems. I'm using one stock DJI charger per battery. So here goes:
1- Remove 4 screws from bottom of warmer

1

1

2- Pry open the case

2

2

3-  The exposed warmer

3

3

4- Unwrap the insulation

4

4

5- Keep going...

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5

6- One of the 30c cut-off

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7-  Another 30c and a 50c cut-off

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8- Cut both side of the heating element wire just next to the cut-off , place warmer case on a board to trace them out.

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9- Tape and apply sillicone of board to the removal top portion of the Plano case.

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9

10- Pre test

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11- Silicone everything (I hate working with silicone:@)

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12- Wire the battery charger to each cut-off respecting the polarity. At this point silicone is everywhere

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13- Bulkhead connector and a 8 foot cord from Digikey. Wow! no silicone here!!

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14- Solder a small power bar wires (look below)...

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15- Silicone and Shrink tube.

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16- Powerbar installed and Velcro-ed to the bottom

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17- Close everything up

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18- Sit back, clean your fingers and Voila!

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19- Also attached one of the remote charger wires so I can charge her too.

19

19

2015-3-27
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dundee
Captain
Flight distance : 33550 ft

Thailand
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Colonel Angus Posted at 2015-3-28 10:41
Dundee  they look the same as what is sitting on my desk.
They are the battery heaters used as holst ...

Would be intresting to see the inside of this heater. (I don't have at the moment)
Realy a good idea but then i have questions.
Hmm, what about dispersing the (heat) of the battery during charging ?
If you keep the casing on, you will insulate the battery and risk to have more heat.
Also you need to cut off the stock plug and then solder the cable to the heater plug.
I'm still not convinced -->  This heater idea versus a 3D printed holster

2015-3-27
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dundee
Captain
Flight distance : 33550 ft

Thailand
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TagTracking Posted at 2015-3-28 11:28
Colonel Angus is right, these are the battery warmer that I've used in a Plano munition box. The box ...

Hi Tag...,
I realy did a good study on this project.
Be sure you have some  power fuse build in there.
A main power switch too.
Also put in a small but good quality ventilator.
Believe me, the stock power supplies they easely get hot.

Be carefull with your design as you can easely charge 1Batt + 1remote on the same power supply
causing it to heat or overheat.
DJI not recommend you charge both with the same power supply.

When you open it again, descending into the silicone , use that kind of insulation i see on
your pics and cover the inside of the plano. (bit more safer if fire break out)
I can see the holes in the body of each holster. Looks good for cooling.

I must say your idea using the stock heaters is Epic.


2015-3-28
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GB44
Captain
Flight distance : 343848 ft
United Kingdom
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Looks like a good effort to me.  

Perhaps DJI could come up with a vehicle charger for two or more batteries.

Certainly makes you think how you could design something if you had a solder gun and  skills etc.

There must be a whole lot of cables though under the surface and worry if these would heat up to an unsafe level  when coiled.
2015-3-28
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Prop-Lock Girl
lvl.4
Flight distance : 2419163 ft
Germany
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Amazing!
I'm waiting for my 4 chargers to arrive an will see if I build something like that.
2015-3-28
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GB44
Captain
Flight distance : 343848 ft
United Kingdom
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Prop-Lock Girl Posted at 2015-3-28 18:40
Amazing!
I'm waiting for my 4 chargers to arrive an will see if I build something like that.

Nice avatar ....

2015-3-28
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TagTracking
lvl.3

Canada
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Dundee, i didn't add any fuses or switch as there are not on the stock charger. I basically just cut the stock charger Y cable and solder it to the contact on the battery warmer. I've kept the cut-off thermistor just as an add-on protection since they were already there. I used to have these chargers all over and always needing a power bar, so I came up with this. I never charge the remote at the same time as battery #1. I'm guessing DJI will have something similar in a couple of months.
2015-3-28
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dundee
Captain
Flight distance : 33550 ft

Thailand
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TagTracking Posted at 2015-3-28 21:19
Dundee, i didn't add any fuses or switch as there are not on the stock charger. I basically just cut ...

Did you see this prototype ?
2015-3-28
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rodger
Captain
Flight distance : 15812070 ft
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United States
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Looks good, nice move on the plug strip with the breaker. I would consider a fan and vent to keep things as cool as possible. Heat is the biggest enemy to electronics. Check the post's for Dundee's setup. H covered all of the bases.
2015-3-28
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Christian
lvl.3

Germany
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This could be interessting too:
http://www.smartpowercharge.com/ ... rod=SPC4500&lang=en

4x Battery Heater 80$ + 4x Charger 200$ + x hours of work
399$ could be an alternative
Anyway: Good and solid work!
Cheers, Christian
2015-3-28
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houston
Second Officer
Flight distance : 11410666 ft
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United States
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Here are some other good ideas from Adam Savage (Myth Busters) experience with his Inspire 1.


Houston
2015-3-28
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houston
Second Officer
Flight distance : 11410666 ft
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United States
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Christian Posted at 2015-3-29 08:02
This could be interessting too:
http://www.smartpowercharge.com/ ... rod=SPC4500&lang=en

That is a really good price considering 4 chargers would cost about the same. Very cool. I put myself on the mailing list for when they come back in stock.
2015-3-28
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GB44
Captain
Flight distance : 343848 ft
United Kingdom
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Christian Posted at 2015-3-29 08:02
This could be interessting too:
http://www.smartpowercharge.com/ ... rod=SPC4500&lang=en

This looks like a good professional Charging System.  I wonder if they will be availble to ship globally or any dealers in UK.
2015-3-29
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smcbrearty
lvl.4

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Finally someone comes up with a killer charging station, DJI where is yours?  As GB44, wonder where we can pick one of these babies up in Canada or US
2015-3-29
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markaguille
Captain
Flight distance : 2031818 ft
Guernsey
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GB44 Posted at 2015-3-29 21:21
This looks like a good professional Charging System.  I wonder if they will be availble to ship glo ...

If you manage to get one to the UK let me know GB.
2015-3-29
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