Lipo 電好用又安全

其實多D人分享咪了解多LI-PO 特性 lu

Any recommendation of Li-Po pack for newbies?

pls refer to my old post

要一提嘅係, 鋰電最好run in 3-5次先, 意思係頭幾次放一半左右就好收手, 咁做可以活化入面d lithium polymer, 舊電會長命d同爆d

How do I know the 鋰電"放一半左右"?  Do you mean using a voltmeter to measure the voltage?

再用一個可測每cell電有幾多V o既工具睇下每cell電相差有幾多V(一cell約4.2v), 如每cell相差多過0.4v, 我就會用 balancer, 將排電 balance 一下

What is this "可測每cell電有幾多V o既工具" ?  Multimeter?

原帖由 kwok7660 於 2007-11-22 11:12 發表

                               
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我都玩o左 Li-PO 半年
分享下小弟o既心得 :
電我用Premium Power 20C 4700mah
差機用 ICE
M車用 GTB 加 SMART STOP , 行11.5R
415 用 LRP 行 11.5R
通常玩到排電比 SMART STOP CUT OFF (大約 6.25V 一會排 ...

咁balancer有乜好介紹??? 唔知使唔使4舊水???

Cell master 可以差 1(3.7V)-3CELL(11.1V) 不過係用 1A 差

Just check the CTX manual, it does not say whether the amperage is adjustable or not.  If charging a 3000mah Li-Po with 1A current, then it'll take approx 3 hours?  Also, would someone explain the function of a balancer?

Thanks.

其實lipo之外有另一隻更好嘅電叫A123，佢無lipo嘅缺點，唔怕過放，唔會爆，仲可以15分鐘充飽，但可惜size大左少少，唔係就perfect。詳情請睇我之前個post

http://bbs.rc-evo.com/viewthread ... ght=a123&page=1

Thanks 各位！獲益良多。

原帖由 herbert1 於 2007-11-22 18:34 發表

                               
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咁balancer有乜好介紹??? 唔知使唔使4舊水???

我用呢隻 : Hyperion LBA10A Net
都要成 $3xx

http://bbs.rc-evo.com/viewthread.php?tid=58849&highlight=

原帖由 SnackEater 於 2007-11-23 00:22 發表

                               
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其實lipo之外有另一隻更好嘅電叫A123，佢無lipo嘅缺點，唔怕過放，唔會爆，仲可以15分鐘充飽，但可惜size大左少少，唔係就perfect。詳情請睇我之前個post

http://bbs.rc-evo.com/viewthread.php?tid= ...

師兄:
其實我都想試下你o果隻 A123, 但我部 ICE 差唔到呀, 唔想投資咁多

原帖由 Ang 於 2007-11-22 19:08 發表

                               
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Just check the CTX manual, it does not say whether the amperage is adjustable or not.  If charging a 3000mah Li-Po with 1A current, then it'll take approx 3 hours?  Also, would someone explain the f ...

我諗應該部差機無得SET0.1A-1A差只可以用1A差

BALANCER 的作用係 差O果時平均分配電比 每一 cell 鋰電, 唔好比兩cell V 數相差咁遠   
我如果無用 BALANCER 差, 差完先BALANCE到都做呢果效果, 個BALANCER佢會張其中一 CELL多o既電放走, 等兩cell 電平均, 時間會比用BALANCER差快好多  
有錯請指教

原帖由 kwok7660 於 2007-11-23 11:56 發表

                               
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師兄:
其實我都想試下你o果隻 A123, 但我部 ICE 差唔到呀, 唔想投資咁多

新出嘅差機寫住LiFe或者A123就差到，我都係有一個差機差到，有時趕住差會用普通鋰電差機，限住佢差幾多mAh。

轉左用無刷4.5R之後跑到14-16分鐘，剛好係充電時間，玩左幾十次個performance都無咩點跌，最主要係唔洗點補養，玩原唔洗話要放電定充一半之類，帶兩排電循環用就玩成晚。

不過用到10A差嘅差機都幾貴，成$1200，暫時得Hyperion 同 MegaPower差到10A咁高。

原帖由 sn-10 於 2007-11-23 14:09 發表

                               
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我都係用lba10,打孖上,可以一次差12cells.

衣家唔洗打孖上架喇，MegaPower有隻12S balancer，佢其實等如兩隻6S balancer，慳返啲駁線，老實講駁線起黎真係好亂！

原帖由 sn-10 於 2007-11-23 14:09 發表

                               
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我都係用lba10,打孖上,可以一次差12cells.

我試過差兩排 4 cell, 不過仲慢
又試過 一 排玩o左一半, 一排玩晒, 跟住差好玩,
發覺兩排玩o既時間比較, 玩晒o果排玩比玩o左一排較為快用完
咁請問sn-10兄, 係咪兩排電要玩清先好差呢?

ps: 我部ice 最多差 5 cell

[ 本帖最後由 kwok7660 於 2007-11-23 14:27 編輯 ]

其實要兩排電一齊充，就算有balancer情況下，都要兩排電電壓接近先好咁做，因為balancer要一段長時間先可以balance兩排電壓好唔同嘅電，到充滿一排電時，第排好可能未滿，咁會將早充門嗰一排電過充，好危險！唔信你可以試下用電錶度下，我都試過咁嘅情況。

要同時充幾排電，最好先用balancer balance左先，然後再充，但咁做時間當然耐，變左無著數。

原帖由 SnackEater 於 2007-11-23 14:39 發表

                               
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其實要兩排電一齊充，就算有balancer情況下，都要兩排電電壓接近先好咁做，因為balancer要一段長時間先可以balance兩排電壓好唔同嘅電，到充滿一排電時，第排好可能未滿，咁會將早充門嗰一排電過充，好危 ...

OIC
THX SnackEater 兄

hi all brother
i would like to ask if after full charge the lipo battery
mine is 4700 and use meter to check, it will drop to 8.19 to 8.2x.....is my lipo battery start have problem? and it have life cycle? because i feel them start not very powerful now
i use them around half year...week week play
i also have one new buy and play around two month.....it also drop after full charge but drop less...around 8.36 and still very powerful
i use imax b5
battery is Premium Power 4700 20c
play white pig to 8T motor...
are yours also have this problem
thx any help

同其他電一樣，鋰電當然有壽命，質數差嘅可以玩十次之內就無晒力，排電質數好而且保養好可以玩過百次都仲保持水準，但我覺得鋰電放落車仔玩好容易過放，因為好難知係咪放到電尾，察覺架車慢其實已經過放，而且同人鬥緊車好容易忘形之下過放。

玩完之後最好每次都用電錶度每cell電壓，玩完十分鐘後度先準確，度到3.8V以上為最理想，對鋰電黎講放電放得越深對壽命影響越大。

充電之後好快跌到4.1V per cell呢個情況係典型死電例子，排電唔係唔用得，但性能大不如前，如果用電錶度你會發覺一有loading電壓就跌得好快，無左loading電壓就升返上黎，表示容量同放電性能都大大減低，丟得。但你都用左佢半年，唔算死得快但都算回本了。

thx a lot
one more question
if use this 4700 play fast car (8T to 11T)
how many time play is good le ?
i play it 6 min x2 ...12 min and check it around 7V after play
normally cut voltage is 6.25v....is it when i check it...it just go up from low 6.25v (let say 6v) to around 7v when i check....
then i overrun it le...
i haven't install any detect like novak one, just feel slow then stop play and check voltage...the worst case check around 6.5v after play...never under 6.25v le...sigh and charge it back around 4200mah with imax...
i play them half year...week week play...should be charge and play over 30 times.....
it still can use but just not like new buy one (very powerful)....so any comment about the life cycle....over 50 time have power ? over 100 time still very power ?
compare with thoes nimh about the powerful time....is nimh can have power more time then lipo..let say have full power play over 30 time charge and discharge then drop performance?
anyway.... i still feel lipo is good due to it easy manage...
may be just i overrun it and make it drop performance....

2S 7V，最樂觀都3.5V per cell，已經過放得很，咁都玩到30次都算你好彩，更何況通常都唔會咁平均兩cell都係3.5V，有一cell通常行先一步...

至於玩幾耐，人地講你都唔好信晒，靠自己度最安全，續啲時間加上去，以玩完之後度到3.8V以上為安全(隔十分鐘先度)。