用電趨向

如題, 依家大家用電既趨向仍然係3a ni-mh電定有新趨向?li-fe??

Li -PO ...la

16vale 發表於 2013-4-2 15:58
Li -PO ...la

你開玩笑?

暫時仲係Nimh多,因為比賽都係用Nimh

如果用2S LIPO, 塊板頂得住無? 叉滿電應該有8V左右

I've been using Ni-Zn batteries for more than a month now.  Nominal voltage is 1.6 per cell.  Very very powerful!.

kevt2005 發表於 2013-4-4 14:18

                               
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I've been using Ni-Zn batteries for more than a month now.  Nominal voltage is 1.6 per cell.  Very v ...

請問可否用 Ni MH program 來叉 Ni-Zn?

allblue 發表於 2013-4-4 19:19

                               
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請問可否用 Ni MH program 來叉 Ni-Zn?

Never use NiMH charger to charge NiZn batteries.  Different chemistry.  Use only the NiZn charger or chargers with NiZn mode, such as PowerLab6/8 chargers.

kevt2005 發表於 2013-4-4 14:18

                               
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I've been using Ni-Zn batteries for more than a month now.  Nominal voltage is 1.6 per cell.  Very v ...

Ni-Zn x4 ?

jj1985 發表於 2013-4-4 22:25

                               
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Ni-Zn x4 ?

I'm not sure what's your question.  I'm using AAA size NiZn batteries.  Mini-Z requires 4xAAA.

allblue 發表於 2013-4-4 19:19

                               
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請問可否用 Ni MH program 來叉 Ni-Zn?

要用原厰充否則D電會义爆。

kevt2005 發表於 2013-4-4 14:18

                               
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I've been using Ni-Zn batteries for more than a month now.  Nominal voltage is 1.6 per cell.  Very v ...

師兄係車場定屋企玩?

Track of course, but not MMS nor CT.

kevt2005 發表於 2013-4-4 22:44
I'm not sure what's your question.  I'm using AAA size NiZn batteries.  Mini-Z requires 4xAAA.

Thanks C Hing. 咁想再請教一下, MR03可唔可以用到 2S LIPO, 叉滿2粒LIPO電,會唔會燒板?

jj1985 發表於 2013-4-6 11:14

                               
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Thanks C Hing. 咁想再請教一下, MR03可唔可以用到 2S LIPO, 叉滿2粒LIPO電,會唔會燒板? ...

I have not seen LiPo batteries for Mini-Z on the market yet.  As far as I know and I've seen, for Lithium chemistry, there is only LiFe batteries that fits a MR03 chassis (still requires some modification).  Generally speaking, voltage of around 6V will not kill the board.  Using Ni-Zn as an example, it has characteristics similar to LiPo chemistry and it has nominal voltage of 1.6V per cell (AAA size).  I've tried running Ni-Zn on MR03 stock (without FETs) with PN50T and AD Stock motor without problem.  As a matter of fact, Ni-Zn can actually be charged up to 1.9V.  So, in my tests (not very objective and comprehensive though) the MR03 boards (both with and without TikiTiki mode) should be fine to deal with higher voltage batteries.  However, I would recommend to add FETs though if you would be playing with the car continuously with packs of batteries as Ni-Zn batteries are very hot after playing.
So, back to your question, if you can find LiPo batteries that fits on MR03, the above comments should still hold true.

kevt2005 發表於 2013-4-7 15:47
I have not seen LiPo batteries for Mini-Z on the market yet.  As far as I know and I've seen, for  ...

咁CHING知唔知MR03 Without takiki 塊板最大頂到幾高電壓?用6粒NiHM 得唔得呢?我而家自己改咗,加咗1粒外接電池箱,THX

jj1985 發表於 2013-4-7 18:25

                               
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咁CHING知唔知MR03 Without takiki 塊板最大頂到幾高電壓?用6粒NiHM 得唔得呢?我而家自己改咗,加咗1粒外 ...

I have not tested the MR03 board to its limit and so I cannot say what's the actual max voltage the board can accommodate.  I would recommend you to measure the actual voltage output of your modified battery pack.  Under 6.5V should be OK.  6xNiMh should be something like 1.2V*6=7.2V.  Mind you that 1.2V is the nominal voltage.  Actual can be something like 1.25V per cell and so 6 NiMh will be very likely kill the board even for the latest board and I would not recommend you to even try.  Anyway, if you still want to try, accept the risk and be ready to lose a board.  Good luck.

kevt2005 發表於 2013-4-7 20:09
I have not tested the MR03 board to its limit and so I cannot say what's the actual max voltage th ...

多謝CHING 詳細回覆,又學到野. 不過我英文唔係咁好, 想再確認一下, MR03 可用4粒 NI-ZN 電?
4粒電壓介乎 1.6X4=6.4 至 1.9X4=7.6 之間? 都唔會燒板? 謝謝ching!!!

I think a charge up NiMh battery will be around 1.4-1.5V so that 6x is around 9V max.
For NiZn, 4x1.9 is around 7.6V and still a lot less than 6xNiMh.
So I recommend you not try to use 6xNiMh or you will push it to the limit too soon.

jj1985 發表於 2013-4-8 11:31

                               
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多謝CHING 詳細回覆,又學到野. 不過我英文唔係咁好, 想再確認一下, MR03 可用4粒 NI-ZN 電?
4粒電壓介乎  ...

Sorry, my computer doesn't have chinese character input now.  You are correct.  I was just trying to be conservative.  Max Charge-up voltage of a Ni-Zn is around 1.907V but it will quickly drop to below 1.8XV as soon as you remove it from the charging rack.  It'll continue to drop to 1.6X and maintain for a long period and then drop sharply at the 3rd stage.
See the attached graphs of Ni-Zn discharging and charging.

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