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督,or not to 督,This is the question.
Poll ended at 28 Mar 2004 12:56 am
督,睇佢漏 D 乜出黎! 67%  67%  [ 6 ]
唔督,睇佢谷幾耐! 33%  33%  [ 3 ]
Total votes : 9
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 Post subject: 塊鋰電脹卜卜
PostPosted: 20 Mar 2004 12:51 am 
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Joined: 26 Feb 2004 05:08 pm
Posts: 2944
Location: Hong Kong
攪攪下電腦,望下放係一旁的電池,嚇然發現 pack 3s2p 的其中一 cell 脹到好似個波,按一下發現壓力好好大,請問各位大佬,知唔知係乜事? Pack 電放係度幾個月都冇用過,又冇過熱。

塊電就肯定唔要得,但係諗緊督唔督爆佢好,唔督,又驚佢爆炸,督,又唔知佢漏 D 咩出黎。

另外其餘五 cell 又用唔用得?

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 Post subject:
PostPosted: 22 Mar 2004 09:33 pm 
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Joined: 26 Feb 2004 10:52 pm
Posts: 586
Location: Shatin
一定要督, 否則爆炸便會更危險!!!


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 Post subject: 裏面係 D 勿
PostPosted: 22 Mar 2004 10:27 pm 
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Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
CM,
我好有興趣睇裏面係 :?: 點既樣。
會唔會係一塊塊片,中間就哩電池水哩!


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 Post subject:
PostPosted: 22 Mar 2004 11:26 pm 
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Joined: 26 Feb 2004 03:51 pm
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Location: Hong Kong
Lithium ion 可能有毒,督爆佢時要特別小心!


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 Post subject:
PostPosted: 22 Mar 2004 11:37 pm 
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Joined: 26 Feb 2004 05:08 pm
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Location: Hong Kong
據講 Lithium ion 有毒,所以 Lithium ion 電池要用金屬殼包裝,Lithium Polymer 解決了有毒的問題,所以可用較輕便的包裝。但安全計,我已把那電池用膠袋封好,遲些再決定怎樣處置。

嘩唔掂 :shock: 我電腦隔黎仲有兩舊 Lithium ion,個金屬殼"谷"哂,好似又想穿咁 . . .


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 Post subject: Re: 塊鋰電脹卜卜
PostPosted: 23 Mar 2004 12:10 am 
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Joined: 26 Feb 2004 07:54 pm
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Location: Tai Po, HK
CM Cheng wrote:
另外其餘五 cell 又用唔用得?


CM, 我覺得你 pack 電都係由幾塊獨立既電所組合而成。就好似 D receiver 電咁,cut 粒死既出就變成一pack 低 volt D 既電?
:wink: 如果係我,就會係個防火既位置試佢用唔用得先。


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 Post subject: Re: 塊鋰電脹卜卜
PostPosted: 23 Mar 2004 12:30 am 

Joined: 02 Mar 2004 10:18 pm
Posts: 208
[quote="K.Y.Mak"][quote="CM Cheng"]另外其餘五 cell 又用唔用得?[/quote]

CM, 我覺得你 pack 電都係由幾塊獨立既電所組合而成。就好似 D receiver 電咁,cut 粒死既出就變成一pack 低 volt D 既電?
:wink: 如果係我,就會係個防火既位置試佢用唔用得先。[/quote]
cut 粒死電volt數唔會低,但A數就少啦,就咁睇photo 係唔係每片2200mA鋰電呀?

CM,你D電咁死法,會唔會個叉機唔得呀?


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 Post subject:
PostPosted: 23 Mar 2004 03:15 am 
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Joined: 26 Feb 2004 05:08 pm
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Location: Hong Kong
我估其餘五塊應該正常,但問題係為何有一塊會壞? 純粹質量問題,還是錯誤使用? (實際上並無正式使用過,只係在差機上 cycle 過幾次而已。)

現在只有五塊,唯一的組合是 5s,推馬達電流不足! 我考慮把它們用在 F3F timer 上,較輕便。

hendry:
那些是 2000mAh LiPo,差機是Schulze,我想該差機應沒問題,我用它來充另一 pack 1300mAh LiPo 都很正常。

************
剛想到一個可能性,由於 3s2p 是 close loop,如果有一塊跟其它的參數差太遠,會不會被"谷"死? 現在那塊脹卜卜電已軟林林,可能是因已被切離線路。


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 Post subject:
PostPosted: 24 Mar 2004 06:22 pm 
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Joined: 02 Mar 2004 09:03 am
Posts: 35
朋友們!其實有冇D充電機係充Li-ion又可充Ni-MH及Ni-CD,可以介紹下嗎?


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 Post subject:
PostPosted: 24 Mar 2004 09:42 pm 
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Joined: 26 Feb 2004 05:08 pm
Posts: 2944
Location: Hong Kong
Hello Kevin, Schulze 的充電機係一個唔錯既選擇,基本上乜電都充到,包括架車舊水電!

http://www.schulze-elektronik-gmbh.com/index_uk.htm


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 Post subject:
PostPosted: 24 Mar 2004 10:15 pm 
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Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Orbit MICROLADER V6.3 can charge many types of batteries. I've been using it for a while, it's good.
check the following link.
http://www.orbitronic.de/


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 Post subject:
PostPosted: 24 Mar 2004 10:39 pm 
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Joined: 26 Feb 2004 05:31 pm
Posts: 741
Location: 沙田
一般可以差埋鋰電既 Ni-Cd/Ni-MH 差機都幾貴﹐未必適合初初開始玩既朋友。偉高有賣台灣伸泰出既鋰電專用充電器﹐非常平。可以考慮。


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 Post subject:
PostPosted: 25 Mar 2004 12:45 am 
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Joined: 26 Feb 2004 03:51 pm
Posts: 3626
Location: Hong Kong
講開又講,請問各位機友有見過大約4寸X1.2寸、3cells嘅鋰電,同時最大電流至少可出18A?
我有隻電Switchblade,由於機小無足夠空間放大嘅電池,現時只可挽強放600mAh嘅NiCD,玩5分鐘左右就完。曾經放過750mAH嘅NiMH,但摩打扯到13A左右電變就Cut電。希望可以換個大容量少少,又輕啲鋰電,各位機友有冇好介紹?


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 Post subject:
PostPosted: 25 Mar 2004 01:37 am 

Joined: 02 Mar 2004 10:18 pm
Posts: 208
[quote="Stanley"]講開又講,請問各位機友有見過大約4寸X1.2寸、3cells鋰電,同時最大電流至少可出18A?
我有隻電Switchblade,由於機小無足夠空間放大電池,現時只可挽強放600mAhNiCD,玩5分鐘左右就完。曾經放過750mAHNiMH,但摩打扯到13A左右電變就Cut電。希望可以換個大容量少少,又輕鋰電,各位機友有冇好介紹?[/quote]
CyberLipo V.3. 70x40.5x24.5, 140gm, 6A/8C
call Cyberheli Stephen for more......


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 Post subject:
PostPosted: 26 Mar 2004 10:33 am 
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Joined: 02 Mar 2004 09:03 am
Posts: 35
多謝Y C Lui, K.Y.Mak, CM Cheng 既提供,不過果D德國嘢要成兩千幾蚊真係幾貴,都係用返D國貨好D啦! :lol: 多謝!多謝!


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 Post subject: Information from AMA
PostPosted: 26 Apr 2004 11:38 am 
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Joined: 26 Feb 2004 10:52 pm
Posts: 586
Location: Shatin
EMERGENCY SAFETY ALERT
Lithium Battery Fires
Lithium batteries are becoming very popular for powering the control and power systems in our models. This is true because of their very high energy density (amp-hrs/wt. ratio) compared to NiCads or other batteries. With high energy comes increased risk in their use. The, principal, risk is FIRE which can result from improper charging, crash damage, or shorting the batteries. All vendors of these batteries warn their customers of this danger and recommend extreme caution in their use. In spite of this many fires have occurred as a result of the use of Lithium Polymer batteries, resulting in loss of models, automobiles, and other property. Homes and garages and workshops have also burned. A lithium battery fire is very hot (several thousand degrees) and is an excellent initiator for ancillary (resulting) fires. Fire occurs due to contact between Lithium and oxygen in the air. It does not need any other source of ignition, or fuel to start, and burns almost explosively.

These batteries must be used in a manner that precludes ancillary fire. The following is recommended:

Store, and charge, in a fireproof container; never in your model.
Charge in a protected area devoid of combustibles. Always stand watch over the charging process. Never leave the charging process unattended.
In the event of damage from crashes, etc, carefully remove to a safe place for at least a half hour to observe. Physically damaged cells could erupt into flame, and, after sufficient time to ensure safety, should be discarded in accordance with the instructions which came with the batteries. Never attempt to charge a cell with physical damage, regardless of how slight.
Always use chargers designed for the specific purpose, preferably having a fixed setting for your particular pack. Many fires occur in using selectable/adjustable chargers improperly set. Never attempt to charge Lithium cells with a charger which is not, specifically, designed for charging Lithium cells. Never use chargers designed for Nickel Cadmium batteries.
Use charging systems that monitor and control the charge state of each cell in the pack. Unbalanced cells can lead to disaster if it permits overcharge of a single cell in the pack. If the batteries show any sign of swelling, discontinue charging, and remove them to a safe place outside as they could erupt into flames.
Most important: NEVER PLUG IN A BATTERY AND LEAVE IT TO CHARGE UNATTENDED OVERNIGHT. Serious fires have resulted from this practice.
Do not attempt to make your own battery packs from individual cells.
These batteries CANNOT be handled and charged casually such as has been the practice for years with other types of batteries. The consequence of this practice can be very serious resulting in major property damage and/ or personal harm

Safety Committee
Academy of Model Aeronautics

5161 E Memorial Drive
Muncie, IN 47302


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 Post subject:
PostPosted: 01 May 2004 01:28 am 
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Joined: 26 Feb 2004 05:08 pm
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Location: Hong Kong
隔左一個月,pack 電又有兩塊發漲,睇黎成 pack 電都係唔可以用,不過就係唔明點解 . . . . :?:

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 Post subject:
PostPosted: 02 May 2004 08:23 pm 
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Joined: 26 Feb 2004 05:31 pm
Posts: 741
Location: 沙田
塊電漲到極點唔知會唔會咁...
http://www.helihobby.com/videos/LithiumBattery.wmv


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