RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 922 views POST REPLY
HomeAircraftHelicopter
e-
Electric Battery-Charger-pSupply
› Lipo Gurus please help
03-05-2008 03:25 AM  10 years agoPost 1
BungeeMike

rrApprentice

Honolulu, Hawaii

My Posts: All  Forum  Topic

Aloha Group
I have an interesting and costly problem.
I have had 3 sets of lipos puff or swell in 3 weeks and I am trying to figure out the cause. Your help appreciated. Here is the situation.

Helicopter is maxi joker v1 and maxi v2 running 10s
Charger is TP1010 or schultz 6330d
Balancer is TP205 v
All lipos are just under 1 year old
First 2 sets of batteries are TP 5s4p 8000 mah used as a set bought at same time. Always balanced and never pushed more than 4000 mah, never exceeded a temp of 104. Always babied, one set got soft puff kinda spongy one set of the other group puffed like a marshmellow 1 week later. All 4 batts under a year old and under 75 cycles

3rd set is Tanic 5s3p 7500, same as above soft puff on one pack.

I thought maybe I had a magnet out on my motor but it happened on my new maxi, never had a problem until recently, weather not unusally hot. The batts did sit fully charged for 1.5 months during rainy weather but flew fine several flights after and charged normally.
I have one more set of tanics not affected yet but I am scared to put a $10k machine in the air with it. TP has offered replacements at a reasonable cost which is great but overall I am still shelling out close to $3k in new batteries and dont want to have it happen again.
Any help or guidance appreciated.

Mahalo
Bungee

PM  EMAIL  Attn:RR  Quote
03-05-2008 08:30 AM  10 years agoPost 2
ROSSM

rrNovice

UK

My Posts: All  Forum  Topic

Too much violent 3D sucking the batteries?
Charger slight malfuntion? Could be anything. Expensive!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-05-2008 08:37 AM  10 years agoPost 3
BungeeMike

rrApprentice

Honolulu, Hawaii

My Posts: All  Forum  Topic

3d is out its an aerial photography bird mellow easy flying
bungee

PM  EMAIL  Attn:RR  Quote
03-05-2008 09:45 AM  10 years agoPost 4
fergus

rrKey Veteran

Ireland

My Posts: All  Forum  Topic

Had you been charging them on their own or in series or parallel?

Regards

Fergus

Regards

Fergus

PM  EMAIL  GALLERY  Attn:RR  Quote
03-05-2008 10:24 AM  10 years agoPost 5
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

My Posts: All  Forum  Topic

The most common cause of puffed cells IMO is over charge or discharge, which can be caused by one cell going bad and either the balancing equipment not being able to keep up, or the single cell becomes over discharged due to the loads placed on it in flight.

One test you could do would be to cycle the pack, with balancer in place, and to check the the cells all balance well during the charge and discharge cycle, and to see what capacity the pack has in it. The only difference between this test and putting the cells in the heli are:
- heli will place a greater discharge load
- packs will not (should not) be discharged as much when in the heli

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-05-2008 10:35 AM  10 years agoPost 6
fergus

rrKey Veteran

Ireland

My Posts: All  Forum  Topic

Have you a wattmeter you can place in line with the battery to the ESC. After flight you will be able to see the mAh taken out of the pack, the minimum voltage and the peak amps. It should give you some insight as to whats going on.

I have used a few of them and find this 'inspector wattmeter' to be the best.

https://www.tanicpacks.com/index.ph...b0a03fc5364846e

This combined with the good Doctors suggestion should help you get tp the bottom of the problem and also be in a better position to monitor pack behaviour in the future. As already said the cause is usually a cell being overcharged or over disscharged.

Regards

Fergus

Regards

Fergus

PM  EMAIL  GALLERY  Attn:RR  Quote
03-05-2008 11:25 AM  10 years agoPost 7
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

My Posts: All  Forum  Topic

Using a wattmeter on the heli is a great idea, as you need to know exactly what's going on - current draw, energy taken from cells etc. Without facts, you cannot draw conclusions.

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-17-2008 12:52 PM  10 years agoPost 8
slash1010

rrNovice

ireland

My Posts: All  Forum  Topic

puffing
i notice you said 205v balancer. that wont balance 10s batteries will it.

as others said, too much discharge or heavy consistant amps draw are
big causes of puffing

PM  EMAIL  Attn:RR  Quote
03-17-2008 06:36 PM  10 years agoPost 9
BungeeMike

rrApprentice

Honolulu, Hawaii

My Posts: All  Forum  Topic

Slash
They are 2 ea 5s batteries I run as 10s so yeah the 205v will work if I charge them individually which I do
Mahalo
Mike

PM  EMAIL  Attn:RR  Quote
03-17-2008 06:53 PM  10 years agoPost 10
murp

rrApprentice

Nova Scotia, Canada

My Posts: All  Forum  Topic

As already mentioned, I think your best next step is to determine what the load current is under flight conditions. I use a Micrologger to do this when setting up my heli power systems.

PM  EMAIL  Attn:RR  Quote
03-20-2008 04:18 AM  10 years agoPost 11
John Oakley

rrNovice

morgan utah usa

My Posts: All  Forum  Topic

mike,
we had some problems with a 205 balancer that was over charging cells and we puffed a few packs. it was the same cells on each pack, put a volt meter on each cell.

john

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
WATCH
 1 page 922 views POST REPLY
HomeAircraftHelicopter
e-
Electric Battery-Charger-pSupply
› Lipo Gurus please help
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Tuesday, June 19 - 7:29 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online