Search found 302 matches

by tmho
Jun 23 2020 2:58am
Forum: Battery Technology
Topic: 18650 battery pack design for a powerbank
Replies: 15
Views: 387

Re: 18650 battery pack design for a powerbank

I don't understand what you mean by It has a charging function/mode which uses a different output connection (green colour one but not the red one). I can't access aliexpress today; everything just comes up blank but with colored shapes where blocks of data should be. (this happens with some freque...
by tmho
Jun 22 2020 7:41am
Forum: Battery Technology
Topic: 18650 battery pack design for a powerbank
Replies: 15
Views: 387

Re: 18650 battery pack design for a powerbank

Or use an adustable-voltage adjustable-current CC/CV power supply (often called an LED PSU or Lab PSU), that can be set to the voltage you want. Hi amberwolf, I am using the way you mentioned to charge some of my batteries, and it works for me. Recently, I came across a power supply. It has a charg...
by tmho
May 23 2020 12:16am
Forum: Battery Technology
Topic: BMS Questions
Replies: 4
Views: 151

Re: BMS Questions

Thanks for your replies.

Do you mean BMS should draw current from the whole battery pack instead of from just certain group of cells, except while balancing? And in my case, the BMS is damaged.
by tmho
May 22 2020 2:27pm
Forum: Battery Technology
Topic: BMS Questions
Replies: 4
Views: 151

BMS Questions

Recently, after changing the BMS of my 10S4P battery pack, I found that the voltage of group 7 will gradually decrease (much more when compared with other groups) even if the battery is not being used. When I disconnect the balancing connector, then the voltage of group 7 will stay just like the oth...
by tmho
May 22 2020 1:20pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

Is there a physical difference between lipo and lifepo4 bms versions? Possible to program lifepo4 to work on lipo cells? I am using the "ANT" bluetooth bms. For ANT, all versions can be used for all chemistry. Just choose the versions matching the no. of S group. And you set the voltages you like f...
by tmho
May 11 2020 11:03am
Forum: Battery Technology
Topic: 60V 100A BMS 65mm and Thinner Than 21mm?
Replies: 9
Views: 486

Re: 60V 100A BMS 65mm and Thinner Than 21mm?

This one can meet your requirements. I am using it. https://www.aliexpress.com/item/32997552090.html?spm=a2g0o.cart.0.0.743f3c00LjPB27&mp=1 Check with the seller on the exact size before you buy it. It won't fit my 18650 builds but good to know for my 21700 although the main wires are sticking out ...
by tmho
May 10 2020 1:47am
Forum: Battery Technology
Topic: Charger compatibility
Replies: 10
Views: 282

Re: Charger compatibility

I haven't bought the battery yet but according to the ad is is "High Capacity Security 7.2V 4000mAh Rechargeable Low Self Discharge NiMH Battery Pack". The charger I have, used to be for something else and I measured it to have an output of 8.3V but on the charger it says it has an output of 7.5V a...
by tmho
May 09 2020 1:26pm
Forum: Battery Technology
Topic: 60V 100A BMS 65mm and Thinner Than 21mm?
Replies: 9
Views: 486

Re: 60V 100A BMS 65mm and Thinner Than 21mm?

This one can meet your requirements. I am using it. https://www.aliexpress.com/item/32997552090.html?spm=a2g0o.cart.0.0.743f3c00LjPB27&mp=1 Check with the seller on the exact size before you buy it. It won't fit my 18650 builds but good to know for my 21700 although the main wires are sticking out ...
by tmho
May 09 2020 12:58pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

Hello all, I have the 7S-16S 320A version of this: https://www.aliexpress.com/item/33014476298.html?spm=a2g0s.12269583.0.0.651f3a5cxEIxvi Does anyone know how to wire in an On/off button to shutdown the BMS? IMG_20200417_085139 (2).jpg I have activated the BMS by momentarily applying 4V to the two ...
by tmho
May 08 2020 4:23pm
Forum: Battery Technology
Topic: 60V 100A BMS 65mm and Thinner Than 21mm?
Replies: 9
Views: 486

Re: 60V 100A BMS 65mm and Thinner Than 21mm?

This one can meet your requirements. I am using it.

https://www.aliexpress.com/item/3299755 ... jPB27&mp=1

Check with the seller on the exact size before you buy it.
by tmho
Apr 24 2020 1:11pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

Sorry tmho, I was just responding to serious sam. We're using JBD brand units, and I haven't tried an ANT one yet. It wouldn't surprise me if there was some similar "accessibility" requirements with the ANT software though, as in accessible data to mine for China . You're sure the ANT BMS is all co...
by tmho
Apr 24 2020 1:00pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

I guess the above post from thundercamel is for me. If I am wrong, then sorry, English is just my second language. I just checked my gps setting. Under Settings, Privacy, Location Services, I could not find the "ANT BMS" so as to enable to use gps. Will it because of my iphone is too old (iphone 6)?
by tmho
Apr 24 2020 11:21am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

I have the ANT BMS. I have no problem in using the Android App.

But when I try to use the app for iphone (downloaded from App Store), it just keeps on scanning (as shown in the attached photo) and cannot connect to the BMS. Could somebody kindly help me on this?
IMG_3722.PNG
IMG_3722.PNG (96.42 KiB) Viewed 923 times
by tmho
Apr 22 2020 3:52pm
Forum: Battery Technology
Topic: Questions about CC charging
Replies: 12
Views: 527

Re: Questions about CC charging

I just don't understand the purpose of the CC phase. Why not just use CV mode, aka set the voltage to maximum battery voltage, provide a constant amount of amps, and let the battery draw what it wants? Then either disconnect when maximum voltage is reached (for fast charging), or let it continue ch...
by tmho
Mar 26 2020 12:54pm
Forum: Battery Technology
Topic: What do think of this BMS?
Replies: 10
Views: 655

Re: What do think of this BMS?

ebike11 wrote:
Feb 28 2020 11:00am
maccoa wrote:
Feb 28 2020 10:43am
i have the 100Aversion , work fine .
Do u know the app name? I cant seem to find it
The one for iphone is called ANT BMS. Go to App Store and key in ANT BMS and search. You will find it but part of the name is in Chinese.
by tmho
Mar 26 2020 11:09am
Forum: Battery Technology
Topic: What do think of this BMS?
Replies: 10
Views: 655

Re: What do think of this BMS?

I have one with the same brand name "ant". So far it is good. According to one seller from Aliexpress, one App is good for all models. He also will email the Apps to you even if you are not buying it. I had tried that and got the Apps from him/her. Try to search the bms from Aliexpress again and fin...
by tmho
Dec 10 2019 3:56pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

I finally finished my battery pack with the bluetooth BMS. But something strange that I cannot understand why. I set the no. of cell (14s) and the capacity (13.5AH) of the pack. And I got the following readings from the app. Voltage of the pack: 51.7V Capacity of the pack: 7.006AH (52%) Highest vol...
by tmho
Dec 10 2019 6:33am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

Also, I have downloaded the app for iphone hoping that it will be normal. But after opening the app, it just keeping scanning and cannot connect to the battery. Could somebody help me on this please?
by tmho
Dec 10 2019 2:22am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

I finally finished my battery pack with the bluetooth BMS. But something strange that I cannot understand why. I set the no. of cell (14s) and the capacity (13.5AH) of the pack. And I got the following readings from the app. Voltage of the pack: 51.7V Capacity of the pack: 7.006AH (52%) Highest vol...
by tmho
Aug 14 2019 1:41pm
Forum: E-Bike General Discussion
Topic: Front suspension forks question
Replies: 43
Views: 1909

Re: Front suspension forks question

That's why the add the lawyer lips to the dropout Sorry, translation please? There's a lip on the outer side of the fork ends that capture the quick release, even when unlatched. They call them Lawyer lips, because they were added to protect the companies from being sued by riders who don't know to...
by tmho
Aug 14 2019 11:20am
Forum: E-Bike General Discussion
Topic: Front suspension forks question
Replies: 43
Views: 1909

Front suspension forks question

I need a front suspension forks for one of my bikes. I saw a post selling one which I would like to buy. But from its photos, I found that there is a place that it is different from the front suspension forks of my other bikes. The difference is the angle of the drop out. Mine are parallel to the ve...
by tmho
Jun 23 2019 1:15pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

Depends on how that BMS is calculating %SoC. All of the various methodologies are guesstimates at best. Accuracy can only be (approximately) benchmarked against constant-current load testing. Thanks for your reply. I think the capacity increase after charging has stopped is not the real situation. ...
by tmho
Jun 23 2019 3:35am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

I finally finished my battery pack with the bluetooth BMS. But something strange that I cannot understand why. I set the no. of cell (14s) and the capacity (13.5AH) of the pack. And I got the following readings from the app. Voltage of the pack: 51.7V Capacity of the pack: 7.006AH (52%) Highest volt...
by tmho
May 26 2019 12:40am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

are there any programmable bluetooth bms that are just 1 cell high? i need to make a flat battery and 7cm is my thickness limit. Mine is 70mm x 138mm x 17mm excluding the wires. Mine is the 7s-16s 100A version. I got it from taobao.com. You can find it from https://www.aliexpress.com/item/Bluetooth...
by tmho
May 25 2019 12:56pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1502
Views: 184654

Re: bluetooth BMS?

flippy wrote:
May 25 2019 3:38am
are there any programmable bluetooth bms that are just 1 cell high? i need to make a flat battery and 7cm is my thickness limit.
Mine is 70mm x 138mm x 17mm excluding the wires.