FoundingPower
10 W
- Joined
- Nov 13, 2012
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- 73
alarm will not be sound when bleeding.Please look at the "state" of battery.You can screenshot to me.mark133 said:
foundingpower programmable bms
- Thread starter nechaus
- Start date
FoundingPower
10 W
- Joined
- Nov 13, 2012
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- 73
Bazaki said:
I do have the CS BMS et Alu casing and I think Im going to like it but maybe someone can help me with the wiring ?
I use 18s lipo made of 3 x 6s turnigy 5000mah
Eason sent me the above diagram but I have a 18s Lipo pack, all cells connected in series, I do not understand pin 16 and 17, V10 is not a – it is the + of batt V10, becasue it is next to Batt v9+, then ofcourse v10 is not a – but a +
And pin 1 and 2 are going to the same cell tab right ?
It is confusing, the Jst connectors of the turnigy are have 7 pins, pin 7 of 6s pack nr 1 is the same as pin 1 of 6s pack nr 2 right ? So I connect them to each other and see it as only 1 pin ? The same for pack 2 pin 7 and pack 3 with pin 1
I hope someone can help me out.
18s cells connection:
Connector 1: V- V- 1+ 2+ 3+ 4+ 5+ 6+ 7+ 8+ 9+ / / / 9+
Connector 2:10-(9+) 10-(9+) 10+ 11+ 12+ 13+ 14+ 15+ 16+ 17+ 18+ / / / 18+
Please connect your cells according to this table.
mark133
10 W
FoundingPower said:
FoundingPower
10 W
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mark133 said:
Please note there is "over voltage" alarm.some of your cells are over voltage.
Please check the "OV limit" parameters you set in 2nd page.and you also can screen shot the 2nd page to me .
mark133
10 W
Heres the screen shot
NeilP
1 GW
If you want to make a pack of 34s LiPo, can you use two of these units and will they connect to each other..so What I am asking is can you daisy chain as may as these as you need to make bigger packs?
FoundingPower
10 W
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Please look at cell 16.mark133 said:
It probably has been over voltage so that BMS alarms "OV".
BMS will stop alarming until it is lower than CHG recover.
FoundingPower
10 W
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NeilP said:
No you can not yet.
We are developing a "daisy chain" moudel.
When finish developing ,you may at most use 120S(5*24S) BMS main moudel.
NeilP
1 GW
Look forward to it
Many thanks
Many thanks
NeilP
1 GW
I have not read the whole thread yet. Need to read up and see what this can really do. I mean will it be suitable to fit to a bike for someone with NO knowledge..I build the pack..give it to them and then it is just plug, charge, use and forget?
mr.electric
10 kW
I'm about ready to try something easy like one of these. I am getting tired of pluging and unpluging the wiring mess to my rc pack
mark133
10 W
Hi Eason heres a link to whats happening!!!!!!!
Even with all cells sitting below 3450mv and start charging it just keeps going until the first cell (No 16) hits 3650mv and then bleeds all of them with the alarm sounding.
http://www.youtube.com/watch?v=6uZ9g5kKNJs
Even with all cells sitting below 3450mv and start charging it just keeps going until the first cell (No 16) hits 3650mv and then bleeds all of them with the alarm sounding.
http://www.youtube.com/watch?v=6uZ9g5kKNJs
agniusm
1 MW
Hi. Have you tried changing hvc to 3490mv? One cell is charging faster than the others, might be solved after few full cycles.
FoundingPower
10 W
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I can not visit youtube in China.mark133 said:
I think Agniusm is right.Your 16 cells is charging faster than others,and it could easy to reach OV(3650),so BMS alarm "OV".
Please set CHG limit to lower value or you can set the OV limit to higher value.
mark133
10 W
Hi, I've tried all sorts this afternoon but to no avail,
Could someone explain what is meant to happen in the charging and balancing process?
Cell 16 just seems to race past the chg_limit until it hits the overvoltage limit and the alarm sounds
Yours
Well confused
Could someone explain what is meant to happen in the charging and balancing process?
Cell 16 just seems to race past the chg_limit until it hits the overvoltage limit and the alarm sounds
Yours
Well confused
agniusm
1 MW
The way i understand it:
Charging starts, when one/few of the cells hits HVC, charging stops and it is discharge to the level of other cells than charging kicks in again. This is repeated until all cells are at the same voltage fully charged. If it is capacitor bms than high voltage is transferred to other cells.
Have you tried to discharge the pack then charge it again? Perhaps couple of cycles would help?
Charging starts, when one/few of the cells hits HVC, charging stops and it is discharge to the level of other cells than charging kicks in again. This is repeated until all cells are at the same voltage fully charged. If it is capacitor bms than high voltage is transferred to other cells.
Have you tried to discharge the pack then charge it again? Perhaps couple of cycles would help?
mark133
10 W
Am going for a discharge right now, is there a quicker way to discharge the pack as I have it connected to the bike on full throttle but I think it will take ages with no load on the motor
What voltage would you recommend I take the cells down to?
What voltage would you recommend I take the cells down to?
cassschr1
10 kW
I see this happening also with a power lab 8. If your charging with say above 4-5 amps you will drive the voltage up quickly on that particular cell. Apparently the charger can't cope with it. And the others aren't really to far behind, but it goes into a safety charge of .5a and brings the other cells down to all the same voltage. If charging with lower current the balancing seems to go better. Oh these are a123 20a cells which I'm getting 17.5ah out of and doesn't matter the load.
FoundingPower
10 W
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mark133 said:
Please give the info of your charger.If the current of your charger is higher than 10A,
I suggest you to change the CHG_STOP_Current to 2000mA.
When charging to CV,current of charger become lower,hall sensor you got is +-200A,maybe <2A charging current will not be monitored by hall sensor,then bms will think charging stops and will not cut off at CHG_LIMIT,but charger continue to charge in a lower current until cells OV.
mark133
10 W
The charger is
Battery type* = LiFepo4 A123
Charge voltage* = 60v (18s) 18*3.65=65.7V
Amps= 10
600w
It came from:
http://www.bmsbattery.com/alloy-shell/27-alloy-shell-600w-lifepo4li-ionlead-acid-battery-ebike-charger.html
will still carry on discharging the battery tonight
Battery type* = LiFepo4 A123
Charge voltage* = 60v (18s) 18*3.65=65.7V
Amps= 10
600w
It came from:
http://www.bmsbattery.com/alloy-shell/27-alloy-shell-600w-lifepo4li-ionlead-acid-battery-ebike-charger.html
will still carry on discharging the battery tonight
FoundingPower
10 W
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mark133 said:
Ok.please set CHG_STOP_CURRENT to 2000mA
drewjet
10 kW
Foundingpower, your BMS's are very interesting. Your website however, is difficult. I have a 21 series 6 Parallel A123 pack of 20AH cells(6 of the A123 Packs from Victpower), and may go up to 24S . I want a BMS for charging only, I do not want restrictions on Discharge, and would like to charge with up to 40 Amps. Which BMS does this, and how much is it, and how do I order?
mark133
10 W
Hi Eason
I changed the CHG_STOP_CURRENT to 2000mA and discharged the battery down to 50%.
While it was charging at one point I thought it was looking good when it was bleeding all cells except one that was catching up and it did this for ages.
At this point 17 cells were very close to each other (17 red lights flashing on and off) and one cell only 25mv out from the highest cell with no red light
And then for some reason the highest voltage cell had its red light on and just rose to the OV figure and the alarm sounded and it just keep going round in a loop charge/OV/discharge
Again it was cell sixteen that was the culprit (charging faster than the rest)
Do you think I should swap this cell out for another as i have a few spares?
I changed the CHG_STOP_CURRENT to 2000mA and discharged the battery down to 50%.
While it was charging at one point I thought it was looking good when it was bleeding all cells except one that was catching up and it did this for ages.
At this point 17 cells were very close to each other (17 red lights flashing on and off) and one cell only 25mv out from the highest cell with no red light
And then for some reason the highest voltage cell had its red light on and just rose to the OV figure and the alarm sounded and it just keep going round in a loop charge/OV/discharge
Again it was cell sixteen that was the culprit (charging faster than the rest)
Do you think I should swap this cell out for another as i have a few spares?
cassschr1
10 kW
Eason, Do all your bms,s balance cells on the way up to 3.65 ?
Or does balancing start at a certain voltage?
How about when discharging?
Or does balancing start at a certain voltage?
How about when discharging?
