Gregb
100 W
to the "10" in the yellow quadrant at 7 o'clock I would say. and note the duty cycle....if it gets to 10A get it off before 10 secs and wait 15 mins for it to cool down.if u leave it on for 10 secs.....
new 48 volt battery won't charge past 38 volts.
- Thread starter omnivore
- Start date
dnmun
1 PW
you should read those tutorials and try to understand some simple circuit analysis first so you understand how current flows and where.
e-beach
10 MW
OK, if you are busy, then lets take this in easy doses....mjlorton is long winded, but thorough.....try to digest this as quickly as possable. If it takes a week or so, then so-be-it.
[youtube]ZBbgiBU96mM[/youtube]
[youtube]Kqa51Femytw[/youtube]
[youtube]EVFkKBFJsZg[/youtube]
[youtube]InJhgwmj2So[/youtube]
[youtube]ZBbgiBU96mM[/youtube]
[youtube]Kqa51Femytw[/youtube]
[youtube]EVFkKBFJsZg[/youtube]
[youtube]InJhgwmj2So[/youtube]
friendly1uk
1 MW
omnivore said:
No, that will smoke it.
Were the links offered no good? I didn't check.
To measure currant, it must flow through the meter as if it were part of the circuit. You don't just poke at what is there. You have to break the circuit, then complete it again using the meter.
Hillhater
100 TW
I seriously suspect some of these questions are a "wind up".
Even if not, be careful what advice you give,.... You don't want to be leading someone into a situation where they can hurt themselves.
Even if not, be careful what advice you give,.... You don't want to be leading someone into a situation where they can hurt themselves.
alsmith
100 kW
omnivore said:
OTT
999zip999
100 TW
Bro don't worry it comes with an open forum.
e-beach
10 MW
All right everybody....This is ES! Information not confrontation please! And I am not even one of the moderators.... 
@omnivore, I have found a 4 minute video on what you need to do to follow dnmun's suggestion to find if your BMS is balancing without opening the battery case. First spend 4 minutes with this video.
[youtube]7lwZkl0yBqA[/youtube]
Once you have studied that video a bit, think about this mjlorton drawing. The 10 amp represents your charger and the light bulb represents your battery pack.
Now start considering just how you are going to get you DMM leads in series with your charger and battery pack. In this picture you can see that I have built an extension to my charger where the wires are exposed and can be cut if I decide to put a DMM (or anything else) in series with my charging circuit. BUT, before you start cutting or soldering, please post a picture of your charger plugs so we can get this done right without blowing anything up.
@omnivore, I have found a 4 minute video on what you need to do to follow dnmun's suggestion to find if your BMS is balancing without opening the battery case. First spend 4 minutes with this video.
[youtube]7lwZkl0yBqA[/youtube]
Once you have studied that video a bit, think about this mjlorton drawing. The 10 amp represents your charger and the light bulb represents your battery pack.
Now start considering just how you are going to get you DMM leads in series with your charger and battery pack. In this picture you can see that I have built an extension to my charger where the wires are exposed and can be cut if I decide to put a DMM (or anything else) in series with my charging circuit. BUT, before you start cutting or soldering, please post a picture of your charger plugs so we can get this done right without blowing anything up.
dnmun
1 PW
he doesn't have to do that if he is busy. i would say just leave it charging for days and days and see if the pack voltage climbs. that doesn't require alotta time and it can happen while he deals with his other stuff.
e-beach
10 MW
I am beginning to think that their is nothing wrong with your battery.
The cell voltages as you posted all read 3.6 to 3.7, although you have missed one battery as you pack is listed as 13p (or 13 cells connected in parallel. That means all 13 cells are connected positive to negative to positive to negative etc.)
What is the reading of the missing cell?
Also, try to isolate each cell reading instead of adding them all together. Fully charged each cell should be about 4.20v.
So, I would recommend that you give it a full overnight charge and check the reading again and see what the individual cells read.
List them like this...
1. X.XX volts
2. X.XX volts...
and so on until you have all the cell reading completed.
Also, if you can post pictures of your opened battery, it could help. Just make sure the picts are clear and under 500kb
so you can post them here. 640x480 pixels usually dose it.
The cell voltages as you posted all read 3.6 to 3.7, although you have missed one battery as you pack is listed as 13p (or 13 cells connected in parallel. That means all 13 cells are connected positive to negative to positive to negative etc.)
What is the reading of the missing cell?
Also, try to isolate each cell reading instead of adding them all together. Fully charged each cell should be about 4.20v.
So, I would recommend that you give it a full overnight charge and check the reading again and see what the individual cells read.
List them like this...
1. X.XX volts
2. X.XX volts...
and so on until you have all the cell reading completed.
Also, if you can post pictures of your opened battery, it could help. Just make sure the picts are clear and under 500kb
so you can post them here. 640x480 pixels usually dose it.
dnmun
1 PW
yep, it is totally normal for the voltage to drop when you start discharging the battery.
999zip999
100 TW
Whoops.
dnmun
1 PW
you can pull the BMS up out of the case and take off the shrink wrap and on the backside on the lower pcb you will see how the pins of the sense wire plug are soldered into the pcb all in a row. you can measure using the 20V scale between each two adjacent solder spots on the pcb to measure the individual cell voltages. it looks like your first channel measured 0V in that video.
but you wanna measure the cell voltages while the charger is charging the pack and record the numbers to .01V and write them down for later.
but you wanna measure the cell voltages while the charger is charging the pack and record the numbers to .01V and write them down for later.
dnmun
1 PW
no, there is nothing wrong with leaving the battery on the charger. i could tell anything from your video and i am not really into video stuff like you guys are.
e-beach
10 MW
dnmun said:
Considering I have produced and directed 3 feature documentaries, did production sound on 35 feature films, 12 tv pilots, and a dozen commercials not to mention all the editing, Foley, script doctoring and forgotten small sundery and unsundry film / video duties I have done, all I can say is you are a better man for not being into the "video stuff." :lol:
@omnivore...Put it on the charger buddy! Leave it over night. If you are really worried about a fire, charge it outside. Just let it go on the charger for at least 12 hours and then post you numbers again!
e-beach
10 MW
omnivore said:
Yea, no animal loss is worth a fire due to carelessness! So, OK, just let it charge as long as you can. If you feel better about it, check your pack for heat regularly. Every 1/2 hour or so.
Let us know how it goes.
omnivore
100 W
- Joined
- Nov 14, 2013
- Messages
- 109
8.3
12.5
16.6
20.8
25.0
29.1
33.3
37.5
41.7
45.9
50.1
54.2
still no 13th unless im supposed to check the blue wire there?
these are the readings after it set on the charger all day! Look any better?
I also included some photos for you DNUM!
I lifted up the BMS on one end... theres nothing under it... go figure. I dont see anywhere where these split off into singular connections to check each cells? but I obviously don't know much, so I could be looking right at it and not know.
thanks again guys.
12.5
16.6
20.8
25.0
29.1
33.3
37.5
41.7
45.9
50.1
54.2
still no 13th unless im supposed to check the blue wire there?
these are the readings after it set on the charger all day! Look any better?
I also included some photos for you DNUM!
I lifted up the BMS on one end... theres nothing under it... go figure. I dont see anywhere where these split off into singular connections to check each cells? but I obviously don't know much, so I could be looking right at it and not know.
thanks again guys.
Similar threads
