想買叉機, 有咩平靚正推介?

seasky 發表於 2013-5-13 08:39

                               
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好唔好架?

佢得2條電線, 6排電, 個差板咪要串聯?

佢係並聯, 就算唔同容量電池都可以一齊叉, 只要每一舊電o既串連值一樣就可以, 不過廠方都係建議唔同容量電池分開叉, 因為較高容量電池有機會叉唔足電

seasky 發表於 2013-5-13 09:25

                               
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純討論下

如果並聯, 咁每排電唔同情況. ie, 6排2s 電, 每排每 cell 放淨 3.40v,3.45v, 3.50v,

例如你同時叉4舊 5000mAH, 用 1C 去叉, 佢就會用 20A 黎叉, 塊平衡板有一條平衡線駁返去部 PowerLab 度

一般叉機你都會見到叉電時電流不停咁上上落落, 係因為要叉下又做下平衡, 而 PowerLab 係叉電同平衡同時進行, 所以無呢個情況

seasky 發表於 2013-5-13 12:32

                               
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又有問題,
4排串明白.
但平衡佢得1排線入, 可以做到4排2s 同時平衡架啦?

可以, 有兩個連接方法, 一係買佢塊 MPA 最多可以連接6排電, 另外就係買幾塊 parallel adapters 再加幾條 stackable 40A banana plug cables 黎並聯多過一排電

hon718 發表於 2013-5-13 12:44

                               
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請問６同８有咩分別？幾錢度平衡板須要額外買嗎?

6 係 1000W, 8 係 1344W, 最大分別係叉到6S同8S, MPA要另買

參考價可以上翻 Revolectrix 個網睇

seasky 發表於 2013-5-13 14:20

                               
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明明地, 又唔太明.

你可以上Revolectix個網, 佢有video show畀你睇點用, 或者search youtube都大把

gtimax 發表於 2013-5-14 01:27

                               
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6.5A同時差6排要幾多A既power supply 呢
又要頭痕買一個堅40A既supply啦
唔知會唔會好似開冷氣咁貴:l ...

6.5A同時叉6排電，如果係12Voutput就要36A，24Voutput就18A

Chrispo 發表於 2013-5-15 08:59

                               
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請問如用PL8v2＋MPA同時充６排鋰電, 分別是２排5000mAh、２排6300mAh及２排6800mAh，這樣可以嗎? 謝! ...

只要所有電S數一樣就可以，參考翻十三樓我個post

Htse 發表於 2013-5-19 00:47

                               
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其實我係叉1/8 buggy 電.... 我而家一次要叉2排先玩得, 但個叉機叉得一排, 唔知買咩叉機, parallel 咁叉 ...

PowerLab 唔使自己去計，只需要差電前選擇並聯多少排電同差電電流（以一排電計），部機就會幫你自動計數

fbs 發表於 2013-5-20 17:43

                               
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部機只出兩條大電流差電線，轉接板上無control大電流線路。所以只能串聯差電，六排電串聯後充满要差吾多50V ...

fbs, 我真係叫聲你C兄, 你既偉論真係精彩, 不過我夠膽講一句, 你既電學智識近乎零, 你不如買部PowerLab同佢塊平衡板返去研究下, 試下佢係以並聯定係串聯去差多過一排電先出黎發表偉論, 唔好自己試都無試過, 你覺得係串聯差電就一口咬定話係串聯差電黎誤導其他人

fbs 發表於 2013-5-21 13:13

                               
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Sorry that I just can type english with this computer. I just base on Kirchhoff's law to guess the c ...

Try to think about it, if your theory is correct, a single battery pack constructed with more than 1 cell in parallel, that will be damaged when charging in high current with one charging cable and a balance cable, that's mean all the charger manaufacturers are doing something very wrong (of course not)

fbs 發表於 2013-5-21 15:35

                               
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That is why it is not prefer to buy the pack with cells in parallel. For example if a 7.4V pack has  ...

Do you know many flight packs are constructed in cells parallel?

fbs 發表於 2013-5-21 17:16

                               
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To connect the cell in this way is difference as there are charging circuit for each individual cell ...

fbs, Many people  have the wrong concept like you, none of the chargers can control how to charge individual cell in high current, according to your theory, it also damage the battery packs even in serial connecting.  But, did you aware that some chargers are reducing current bit by bit when batteries reached to about 80-90%, and some chargers are stop charging and switch to balance mode and then switch back to charge mode over and over during charge?  This is how chargers can prevent damage the batteries and control how to balance the batteries.

fbs 發表於 2013-5-21 19:05

                               
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That is why the charger require balance cable to monitor individual cells so that it can switch betw ...

Omg, you still not understand what I mean, you mentioned the batteries would be damaged in parallel charging, now I tell you it will not damage the batteries, that was what I mean.

The only thing you have to concern with in parallel charging is, it may not fully charged all battery packs that I have mentioned in my previous post.

fbs 發表於 2013-5-21 20:36

                               
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The primary function of charger is fully charge the pack connected. I personally cannot accept a cha ...

All chargers have the same situation, not only PowerLab.  Other than that, time concern is what I concern about, I really don't want to take a day to manage all my batteries before play or after play.  Definitely, it is my personal opinion and I am not asking your agreement or force you to follow, in all our discussions, the main point is I want you to know never make a conclusion before you fully understand that and tell others that just what you guess.