Hong Kong RC Sailplane Forum 香港滑翔機發燒友論壇

This forum is dedicated to r/c sailplane enthusiasts 此論壇專為遙控滑翔機發燒友而設
It is currently 19 Dec 2017 12:38 am

All times are UTC + 8 hours




Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: DLG 用的各類电池
PostPosted: 05 Dec 2012 10:52 am 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
因以前用 4s 1.2v 的Ni-Cad 或 Ni-Mh 电話电池, 經常差死.
容量也不足, 很易飛飛o下冇電. :(

所以現在找不同的替代方法,以保安全 !
以下是一些1s li-po 大容量电池, 大家有勿意見 ? :D

Li-po 14500 3.7v 750mAh 20.6g
Image

Li-po 18500 3.7v 1500mAh 34.5g
Image

Li-po 18650 3.7v 2600mAh 46g
Image

Li-ion 16340 3.6v 880mAh
Image


Last edited by K.Y.Mak on 12 Dec 2012 11:44 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: 05 Dec 2012 04:11 pm 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
Mak, if you use rudder, a ~1200mah cell is perfect. If you use rudderless, you can use a 2400+mah cell (~40g) in most planes I've seen. Set alarm to 3.7v.

I love 1S lipo, hehehe


Top
 Profile  
 
PostPosted: 05 Dec 2012 11:22 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
I've just measured my DLGs current setup,
it's 53g ! so any of the above betteries will fit my over weighted ship :lol:


Top
 Profile  
 
PostPosted: 07 Dec 2012 04:22 pm 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
53g!! My god!! haha, use 2600mah and dont forget to charge it again before 2014 :D

Maybe your plane can improve a lot simply by changing to lighter tails!


Top
 Profile  
 
PostPosted: 12 Dec 2012 12:17 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
上個星期上網找到嘅 Lipo 1s 电池巳經運到啦

Image

由左至右係 : (dimension in mm) (mAh from 4.2v ->3v@0.5A) (mAh from 4.2v ->3.7v@0.5A)

1. Ah Kin 的 600mAh Lipo 1s : 11.62g W=20 H=6 L=46 500mAh
2. 淘寶貨 AA size Lipo : 19.10g, AA size 596mAh
3. 淘寶貨 14650 size Lipo : 24.86g, D=14 L=650
4. 日本Air Craft 賣的 Hyperion 550mAh Lipo : 14.21g, W=18.8 H=6.2 L=58.8
5. 淘寶貨 18500 size Lipo : 33.56g, D=18 L=500 1588mAh 810mAh
6. 淘寶貨 18650 size Lipo : 45.64g, D=18 L=650

昨晚把 18500 lipo 差到4.2v, 然後0.5A 放电至3v
共放了約 1600mA. 用呢舊电真係有排飛 :mrgreen:
Image

Ah Kin 借比我嘅 Lipo 600mAh, 比Hyperion 550mAh輕,但电量更高 :shock:
等我下次測試比較吓佢o地先 :D


Last edited by K.Y.Mak on 19 Dec 2012 10:50 am, edited 9 times in total.

Top
 Profile  
 
PostPosted: 12 Dec 2012 03:32 pm 

Joined: 02 Aug 2004 10:14 am
Posts: 621
亞Mak做咗消委会測試中心?, 俾埋尺吋就好嘞! :)
用0.5A放電未必設合DLG的應用, 此外Discharge cut off 在3V???. 長氣未必夠平穩电壓 . 唔知亞堅粒鴨記Lipo有無拆走跟电的IC板. 應該拆走然后駁正負綫 (拆時小心Short! 警告咗先!!!!!)


Top
 Profile  
 
PostPosted: 12 Dec 2012 05:23 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
已加尺吋 :o

咁一般 DLG 放電量用幾多Amp呀?


Top
 Profile  
 
PostPosted: 12 Dec 2012 11:50 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
今晚把Ah Kin 借比我嘅 Lipo 差到4.2v, 然後0.5A 放电至3v. 有500mA

如用1A放电, voltage立刻 < 3.7v :!:


Top
 Profile  
 
PostPosted: 13 Dec 2012 12:23 pm 

Joined: 02 Aug 2004 10:14 am
Posts: 621
1A is ok to simulate the application in DLG.
Battery performs differently when loaded.

If the lipo can stay flat at 3.7V for a long while when discharge at 1A, it is still safe for our application.


Top
 Profile  
 
PostPosted: 14 Dec 2012 12:13 am 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Hi Yeung,

Not even the Sanyo 1600mAh 1s battery can retain above 3.7V while discharging at a constant 1A current.

I bet while a DLG is flying, servos are not moving all the time, hence no need for 1A constant current ! ?

Ah Kin's battery was used in his DLG without problem, but the voltage droped well below 3.7V under 1A load, on my battery discharge mode.


Top
 Profile  
 
PostPosted: 15 Dec 2012 12:38 am 

Joined: 09 Sep 2004 04:57 pm
Posts: 688
我比你果粒电我依家早操一個半小時(1.5 hours).剛好drop 到3.6v 之后就warning .剛剛好,天天時間都差唔多,在 3.7v 時間是最長大約30-45分鈡.呢粒鴨記(昌記五金) 600 mah,記得焊走塊線路板.因為唔知係乜東東.千祈唔好要尼塊野! D 电用時間長短,很取决你D拉桿(spring )和live hinge 鬆緊,好直接影響.不過JR xg-8有电池display 睇.絕對可靠 :D


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC + 8 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron

RCSAIL Home

WindGURU at Ma On Shan, Clearwater Bay and Fei Ngo Shan

Powered by phpBB® Forum Software © phpBB Group