RC EVOLUTION - 遙控工房 - 香港RC遙控車討論區

標題: Li-Po 電一問 [打印本頁]

作者: ThomasKwok 時間: 2012-6-12 12:53
標題: Li-Po 電一問
新手一問
我有兩排朋友比既 SE 4200 30C舊電，不過越charge越漲，唔知可以再用呢?
另外，一般charge Li-Po電應該用什麼setting charge (V and mA)呢?
玩完舊電是否需要放電?

作者: felita 時間: 2012-6-12 14:42
The old batteries will explode (like a balloon) and get fire if you continue to charge them.

For storage, you should recharge the lipo batteries under storeage mode (between 3.2v to 3.8v)!

作者: Allan007 時間: 2012-6-12 18:37

ThomasKwok 發表於 2012-6-12 12:53

登錄/註冊後可看大圖

新手一問
我有兩排朋友比既 SE 4200 30C舊電，不過越charge越漲，唔知可以再用呢?
另外，一般charge Li-P ...

你個朋友都算夠朋友嚕

用1C叉，玩完做storage，不是放電。

作者: ThomasKwok 時間: 2012-6-12 23:09
回復 Allan007 的帖子

咁0的電完之後, 駛唔駛放完先charge storage

作者: Allan007 時間: 2012-6-12 23:22

ThomasKwok 發表於 2012-6-12 23:09

登錄/註冊後可看大圖

回復 Allan007 的帖子

咁0的電完之後, 駛唔駛放完先charge storage

不用放，部叉機會同你搞掂

作者: ThomasKwok 時間: 2012-6-14 16:09
咁,
是否如果玩完0的電最好用storage mode來叉電?
而叉完之後隔左一, 兩星期玩是否都不用再叉?

另外, 是否0的電一漲就唔用得?

作者: Allan007 時間: 2012-6-14 17:25

ThomasKwok 發表於 2012-6-14 16:09

登錄/註冊後可看大圖

咁,
是否如果玩完0的電最好用storage mode來叉電?
而叉完之後隔左一, 兩星期玩是否都不用再叉?

玩完係”一定”要用storage mode。
鋰電自行放電極慢，storage完一兩個月先check一次都得。
只要唔好脹得好離譜，我都照玩，小心D咁解。

作者: ThomasKwok 時間: 2012-6-14 21:26
現在用緊storage mode叉電，setting 是7.4V, 1A
不知是否正確

作者: Allan007 時間: 2012-6-14 21:41

ThomasKwok 發表於 2012-6-14 21:26

登錄/註冊後可看大圖

現在用緊storage mode叉電，setting 是7.4V, 1A
不知是否正確

Storage用1C叉都無問題

作者: ThomasKwok 時間: 2012-6-14 22:14
WHAT IS 1C？

作者: Allan007 時間: 2012-6-14 22:29

ThomasKwok 發表於 2012-6-14 22:14

登錄/註冊後可看大圖

WHAT IS 1C？

即係話例如你舊電係5600mAh，1C即係5.6A，如此類推。

作者: Chrischu33 時間: 2012-6-14 22:29

i think u shouldthrow the fat lipos away first.....

作者: ThomasKwok 時間: 2012-6-14 22:41
回復 Allan007 的帖子

the max. current of my charger is 1A in storage mode. ~_~
So, I cannot set 1C ~_~

作者: Allan007 時間: 2012-6-14 23:19

ThomasKwok 發表於 2012-6-14 22:41

登錄/註冊後可看大圖

回復 Allan007 的帖子

the max. current of my charger is 1A in storage mode. ~_~

Oh, then you need to wait longer for it to complete the storage.

作者: ThomasKwok 時間: 2012-6-14 23:38
yes, over 80mins for 4200mA battery

作者: ThomasKwok 時間: 2012-6-15 23:44
回復 felita 的帖子

附件為兩舊舊既叉電，請問是否兩舊都唔用得？
現況再漲多少少
[attach]632344[/attach]

作者: Allan007 時間: 2012-6-16 00:33

ThomasKwok 發表於 2012-6-15 23:44

登錄/註冊後可看大圖

回復 felita 的帖子

附件為兩舊舊既叉電，請問是否兩舊都唔用得？

漲到破殼而出就真係唔好用啦

作者: ThomasKwok 時間: 2012-6-16 23:20
成日聽人講危險，其實有無人真係試過爆電？

作者: ThomasKwok 時間: 2012-6-17 23:20
回復 ThomasKwok 的帖子

作者: gimsink 時間: 2012-6-18 10:51
你可以上 youtube 睇睇人地 LiPO 起火的情況, 睇完你就唔會问有冇師兄試過了...

作者: ThomasKwok 時間: 2012-6-18 17:03
BTW, I want to buy one or two more Li-Po battery for TA05 RC,
Which one is better? Cost efficiency
PS: The max. output current of my charger is 5A in balance, fast and charge mode.

作者: Allan007 時間: 2012-6-18 22:18

ThomasKwok 發表於 2012-6-18 17:03

登錄/註冊後可看大圖

BTW, I want to buy one or two more Li-Po battery for TA05 RC,
Which one is better? Cost efficiency
...

TA05第一樣要考慮既就係放得落咩電，因為佢原本既電兜係預你用NiMH直電或橫電，LiPo磚電未必舊舊方得落，但一般只要動動手術都應該OK。要留意即使買圓身鋰電都未必一定擺得落，因為通常都長過NiMH直電。講咁耐，如過擺得落當然用蕉通LiPo磚電最好。平平地我覺得都係SMC 50C可以一玩，不過小心唔好玩死電。

作者: ThomasKwok 時間: 2012-6-19 10:18
回復 Allan007 的帖子

smc 50c係幾多ma既model? 大約幾$?
我之前買左silver back 5000mah, 想買其他款比較0下

作者: Allan007 時間: 2012-6-19 10:41

ThomasKwok 發表於 2012-6-19 10:18

登錄/註冊後可看大圖

回復 Allan007 的帖子

smc 50c係幾多ma既model? 大約幾$?

好似係5200mAh，一樓賣$270。

作者: tsfai 時間: 2012-6-20 15:19

ThomasKwok 發表於 2012-6-19 10:18

登錄/註冊後可看大圖

回復 Allan007 的帖子

smc 50c係幾多ma既model? 大約幾$?

Ching,
How much was silver back 5000mah? Tks.

作者: edwardchusing 時間: 2012-6-20 15:24
http://www.youtube.com/watch?v=ZEkewCjiDs0

作者: ThomasKwok 時間: 2012-6-20 20:54
回復 tsfai 的帖子

5000 silver black - $270
Just bought another 5200 silver black yesterday.
$330

作者: tsfai 時間: 2012-6-20 21:51
回復 ThomasKwok 的帖子

Seems a good deal Ching.
Where did you buy it?
How many C is it for 5000mah and 5200mah?
I am also planning to buy one. Thanks.

作者: ThomasKwok 時間: 2012-6-20 21:55
回復 tsfai 的帖子

40C

極X

作者: tsfai 時間: 2012-6-20 22:11
本帖最後由 tsfai 於 2012-6-20 22:12 編輯

回復 ThomasKwok 的帖子

You got a big discount Ching.
I bought 4200mah 40C silverback at $278 last week at 極X...

作者: 阿寶 時間: 2012-6-22 08:29
又學到野呀..

作者: kenjiwu 時間: 2012-6-27 16:04
搭單一問,
各位師兄用邊部差機.
點樣可以charge storage,
小弟岩岩玩, 完全唔識有關鋰電既野.
如果可以, 有冇類似差鋰電既教學.
我知好似問得好低能, 希望有師兄幫到手.

作者: kahungboy 時間: 2012-6-27 16:11

kenjiwu 發表於 2012-6-27 16:04

登錄/註冊後可看大圖

搭單一問,
各位師兄用邊部差機.
點樣可以charge storage,

差機人人都唔同
睇下你預幾多米
平平地首選imax b6 連火牛under$400
<<<差得慢~隱定性都幾好

作者: kenjiwu 時間: 2012-6-27 22:42
回復 kahungboy 的帖子

即係要部差機有Storage mode先得?
我得部i5, 即係要買過部.
咁平時係唔係差番1C就得?

作者: kahungboy 時間: 2012-6-28 08:10
本帖最後由 kahungboy 於 2012-6-28 08:10 編輯

kenjiwu 發表於 2012-6-27 22:42

登錄/註冊後可看大圖

回復 kahungboy 的帖子

即係要部差機有Storage mode先得?

如果你部機有balance mode
平時預返太約差到3.8~3.9V/cell 就可存放很久
d人話1C差電姐係你舊電係3000mah就3A差, 5000mah就5A差

作者: tsfai 時間: 2012-6-28 09:25
本帖最後由 tsfai 於 2012-6-28 09:29 編輯

Ching,
After balance charge, my 2S new lipo gets 8.31v only? Charger shows 8.4V but voltmeter shows 8.31V. I check the individual cells, they add up to 8.31V also. Is that normal? Tks.

作者: Allan007 時間: 2012-6-28 09:47

tsfai 發表於 2012-6-28 09:25

登錄/註冊後可看大圖

Ching,
After balance charge, my 2S new lipo gets 8.31v only? Charger shows 8.4V but voltmeter shows ...

Either your charger or your voltmeter is not accurate. Did you measure the voltage after the charging was completed or while the pack was still connected to the charger?

作者: tsfai 時間: 2012-6-28 11:02
本帖最後由 tsfai 於 2012-6-28 11:03 編輯

Allan007 發表於 2012-6-28 09:47

登錄/註冊後可看大圖

Either your charger or your voltmeter is not accurate. Did you measure the voltage after the char ...

Allan Hing,

I did both - while charging and immediately after the charger shows full. I also measured it both while it was connected to charger and then disconnected from the charger right after the charge completed - both readings from the voltmeter read 8.31V. The charger is new too, bought in less than one week. The lipo pack was played for 2 times only and each time it discharged(started at ~ 7.89v) when doing storage after playing so difinitely it was not over discharged in playing.

I am pretty sure the voltmeter is quite accurate as I have a power supply which reads 13.8V on its display and the voltmeter shows 13.8V too.

作者: Allan007 時間: 2012-6-28 11:28
回復 tsfai 的帖子

Fai Hing,

If your packs are new, they shouldn't drop from 8.4V to 8.31V within a short period. My guess would be you charger may not have really fully charged the pack. The 8.4V may include the real internal voltage (8.31V) and the voltage drop (0.09V) across the cells due to the final charging current. Once you have disconnected the charger, the charging current is interrupted and the 0.09V vanishes.

A good charger should have a very very small final charging current so the 8.4V can be fully "plugged" into the pack.

作者: tsfai 時間: 2012-6-28 16:56
本帖最後由 tsfai 於 2012-6-28 16:59 編輯

回復 Allan007 的帖子

Allan Hing,

Thanks for your comment. I just returned back to RC world after 8 years.
I did an experiment and probably it is the battery problem.
I have 2 new lipo chargers - one AC/DC max 6A and the other 20A - both bought within one month. I have 2 new 4200mAH 40C lipo packs bought within one month as well. After storage, both packs can only be fed with less than 2000mAH with balance charge. Previously I used the 20A one and the final vlotage was 8.31V after a while from completing the charge. I just balance charged the 2 packs this afternoon with the 6A one and they both showed ~8.31 - 8.32V after a while from completion. Both chargers gave out the similar(but not 8.4V) final voltage after full charge. I set 4.8A to charge in both chargers. What a disappoinment? Maybe the chargers and the lipo packs are all bad....

作者: Allan007 時間: 2012-6-28 17:42

tsfai 發表於 2012-6-28 16:56

登錄/註冊後可看大圖

回復 Allan007 的帖子

Allan Hing,

Sometimes the more information our chargers give us, the more worried we appear. As long as you can bash happily with the Li-Po packs, don't bother too much with all the figures. 8.31V is not bad after all.

作者: tsfai 時間: 2012-6-29 11:53
回復 Allan007 的帖子

Yes, agreed. so i decide to play happily first as long as the packs provide reasonable play times. Thanks Ching. Hope to meet you sometimes in JV. Still learning and trying different settings as the car(DF02 but playing on-road) is not designed for on-road. Changed all the original plastic turnbuckles and steering tod to adjustable ones. It looks much better and seems to go straighter

. Please bear with me if you see a "new hand" playing terribly with a DF02 in JV.

作者: kenjiwu 時間: 2012-6-29 16:10

kahungboy 發表於 2012-6-28 08:10

登錄/註冊後可看大圖

如果你部機有balance mode
平時預返太約差到3.8~3.9V/cell 就可存放很久
d人話1C差電姐係你舊電係30 ...

師兄,我買左個有balance既差機了.
入面都有storage mode,
我既電係5200mah 45c
咁我玩之前就set佢balance差 5A同2cell(7.4v)
玩完就set佢storage mode差, 都係5A同2cell(7.4v)
咁樣有冇問題同有冇野要注意?

作者: kahungboy 時間: 2012-6-29 16:18

kenjiwu 發表於 2012-6-29 16:10

登錄/註冊後可看大圖

師兄,我買左個有balance既差機了.
入面都有storage mode,
我既電係5200mah 45c

無問題
總之玩就keep住由4.2v玩到3.4v停或esc set3.2(保守)
保存就3.8~3.9v
係咁簡單了

作者: kahungboy 時間: 2012-6-29 16:23

kenjiwu 發表於 2012-6-29 16:10

登錄/註冊後可看大圖

師兄,我買左個有balance既差機了.
入面都有storage mode,
我既電係5200mah 45c

其實我機乎唔會用storage mode(臨尾balance時太慢)

balance 5A 差返每cell 3.8v停
or
放電去到每cell 3.95v就算

歡迎光臨 RC EVOLUTION - 遙控工房 - 香港RC遙控車討論區 (https://www.rc-evo.com/xbbs/)