Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Batteries and Charging Support > Brand Specific Charger and Battery Support


Brand Specific Charger and Battery Support Brand Specific Charger and Battery Support


Reply
 
Thread Tools Display Modes
Old 07-15-2012, 09:44 AM   #1
dpinvidic
Registered Users
 

Join Date: Apr 2011
Location: Orange County, Ca. USA
Default Just Received Safe 40A ParaBoard V3 - XH with EC3

I just got two of these from EPBuddy ($26 ea.).
I like them. The great thing is that each balance connector is fused with a auto-reset fuse (Poly fuse). Last week I had a brain fart, and plugged in a balance connector backwards, burnt up three copper traces on my unfused para board.

These new boards can only charge 4 batt. at once, but they can be daisychained.
So for $50 I can now charge up to 8 batts. The board from Progressive RC is also nice, but it is $65 and does charge 6 batts.
I think these are much safer than the plain parallel charging cables whic have zero protection against wrong connections.

Dan
Attached Images
File Type: bmp Untitled.bmp (924.8 KB, 159 views)
__________________
Dan AMA# 987374 - T-rex (550DFC,550E, 500FB, 500FBL, 450-Sport, 450-Pro), Blade (400 Mcpx 120SR) - DX-7- And a ton of spare parts
dpinvidic is offline        Reply With Quote
Old 07-15-2012, 10:01 AM   #2
satgod
Registered Users
 
Posts: 4,712
 
My HF Map location
Join Date: Apr 2011
Location: USA,KY,Rineyville
Default

you are right
sooner or later everyone makes that mistake and unfused something is going up in smoke
__________________
Rush 750/stretched V-bar KDE 700XF-495 HV servos Greys reactor CC 160-HV
Trex 600EFL V2 V-Bar ds610 ds650 CC bec/pro Scorpion 130a HV KDE 600XF-530
450L KDE 1750 cc50 4xDS215MG k-bar
X-8 FPV Wing, TBS Discovery FPV, TBS Caipirinha FPV
satgod is offline        Reply With Quote
Old 07-20-2012, 03:55 AM   #3
Corona
Registered Users
 

Join Date: Jul 2007
Location: Sydney, Australia
Default

I also purchased one of these Para boards from EpBuddy with my PL6.

However you need to be aware the Polyfuses only offer protection between a single battery connected the wrong way round and the PL6, if you connect 2 or more packs to the Para Board and connect any one of those packs the wrong way round the smoke will still leak out fast, the fuses won't offer any protection from that fault condition!

And as most of us know, once you let the smoke leak out, it's difficult to get it back in :-)
__________________
What goes up must come down, only why so hard?
Spektrum DX7s, Align 450 Pro, Blade 450 X, Align 500 DFC, Blade mCPX & MQX
Radium Pro Electric Glider. Sydney Australia
Corona is offline        Reply With Quote
Old 07-21-2012, 08:11 AM   #4
dpinvidic
Registered Users
Thread Starter Thread Starter
 

Join Date: Apr 2011
Location: Orange County, Ca. USA
Default Protection is for reversed batteries

[QUOTE=Corona;4122979
However you need to be aware the Polyfuses only offer protection between a single battery connected the wrong way round and the PL6, if you connect 2 or more packs to the Para Board and connect any one of those packs the wrong way round the smoke will still leak out fast, the fuses won't offer any protection from that fault condition!
QUOTE]

Sorry, but this is not correct. The fuses are there to protect the board when you plug in more than one battery, and one is backwards.

First, we must understand that the only problem that can happen is a reverse connection. If I plug in a 3s ballance connecter into a 5s balance plug, and the key slots are on the same side, no problem.even if pin-1 goes to pin-3, as long as the plug is not reversed, each wire is still 3.2v more positive than the lower number pin.

Now notice on the EP board as there seems to be three fuses per connector set. We might first ask "How come we don't see 1 polyfuse per pin".
The best way to explain it is an example of the power leads for a car radio. You only need a fuse in one wire so that when it blows, it opens the circuit. No need to put a fuse in both wires. So on the paraboard, they placed the fuses on alternating pins (and different pins for the groups of balance connectors).
They can do this becasue they are only protecting agains reversed plugs. And when you reverse a plug, there will be one polyfuse in each circuit path between the two batteries. When the polyfuse opens, the circuit is opened and no smoke.

Don't know if I explained this very well, but all of the batteries are protected.

Dan
__________________
Dan AMA# 987374 - T-rex (550DFC,550E, 500FB, 500FBL, 450-Sport, 450-Pro), Blade (400 Mcpx 120SR) - DX-7- And a ton of spare parts

Last edited by dpinvidic; 07-21-2012 at 09:29 AM..
dpinvidic is offline        Reply With Quote
Old 07-21-2012, 06:50 PM   #5
satgod
Registered Users
 
Posts: 4,712
 
My HF Map location
Join Date: Apr 2011
Location: USA,KY,Rineyville
Default

the main leads are all fused so any over current condition will trip the fuse(s)

but if you hook up a balance lead backwards that is a different story all together

you might laugh at this but i've seen it done
__________________
Rush 750/stretched V-bar KDE 700XF-495 HV servos Greys reactor CC 160-HV
Trex 600EFL V2 V-Bar ds610 ds650 CC bec/pro Scorpion 130a HV KDE 600XF-530
450L KDE 1750 cc50 4xDS215MG k-bar
X-8 FPV Wing, TBS Discovery FPV, TBS Caipirinha FPV
satgod is offline        Reply With Quote
Old 07-22-2012, 08:59 AM   #6
dpinvidic
Registered Users
Thread Starter Thread Starter
 

Join Date: Apr 2011
Location: Orange County, Ca. USA
Default I have plugged in balance leads backwards

Quote:
Originally Posted by satgod View Post
the main leads are all fused so any over current condition will trip the fuse(s)

but if you hook up a balance lead backwards that is a different story all together

you might laugh at this but i've seen it done
There are also Polyfuses on the balance connections. They automatically reset, and protect the board if you plug in a balance connector backwards.
Which I have done in the morning before I had my coffee

Dan
__________________
Dan AMA# 987374 - T-rex (550DFC,550E, 500FB, 500FBL, 450-Sport, 450-Pro), Blade (400 Mcpx 120SR) - DX-7- And a ton of spare parts

Last edited by dpinvidic; 07-22-2012 at 07:15 PM..
dpinvidic is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Batteries and Charging Support > Brand Specific Charger and Battery Support


Brand Specific Charger and Battery Support Brand Specific Charger and Battery Support

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com