JK BMS B2A8S20P Detailed Settings [UPDATED]
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- Опубликовано: 10 фев 2025
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Some features of our smart active balance BMS: intelligent compatible battery string 4-8 S, 8-17 S, 8-24 S, and integrated 1A active balancer, Bluetooth, parallel module, and disconnection protection/wrong-line protection, support APP/PC host/WIFI/CAN/RS485. Inverter BMS Compatible with Growatt/Victron/Deye Inverter
We've actually tested and matched most of the inverter brands on the market.and they work very well,and the BMS can also work offine without battery connection.
We use the CANBUS/RS485 communication protocol to communicate with the inverter,and BMS actively uploads the battery pack data,which is more secure.
Good video...I ask you...can I replace the original cables of the JK BMS with a #18 cable without affecting the BMS balancing process?
Hi can I connect couple jk bms in parallel?
Great stuff, can this setup of 280ah with the JK BMS be connected parallel to another same 280ah with Jk BMS for a total of 560ah. Can the JK BMS handle this, I only ask as I read somewhere a bms parallel module will be needed.
Good evening,
Thank you for all the videos and all these explanations.
I have a problem with the JK BMS connected with a Growatt hybrid inverter and a 16S Lifepo4 battery, the SOC drops from 60% or 50% to 1% in less than a minute. The batteries seem correct to me.
How can I solve this problem.
Thank you for your feedback.
Pascal
Do you have any info on the b2a8s30p?
Why not do OVO = 3.65? There are others that recommends this setting?
He explained it in the video. If your charger is not providing enough charge voltage to hit a cell voltage of 3.65v, the charge mosfet will never shut off, and you'll continue supplying voltage. The battery should never hit above 3.65 at all, and should never just sit under a constant charge above 3.4. The resting 100% SOC voltage of a LiFePo4 cell is 3.4v. But if it never shuts the charger off, it will keep seeing a voltage that is above the rest voltage and never be able to rest, which will cause crystalization within the cell chemistry, and cause damage to the battery over time. Lowering the OCP voltage to a slightly lower target will help ensure that your charger can hit the target, and the battery can stop charging and be allowed to rest.
The difference in actual battery charge capacity between 3.5 v and 3.65 is VERY little, but that slight difference in voltage CAN do significant damage to the battery over time. So you really don't sacrifice any real-world battery capacity, but you gain a ton of safety margin and a longer lasting battery by doing this.
If you want a full service life, pretty much the ONLY time your cells should see 3.65v is when you do the initial top-balance when initially building and commissioning the battery, and then maybe once every year or two if you need to do some maintenance and do a manual top balance charge of each cell, or if you want to do a capacity test for whatever reason.
Realistically, modern a modern BMS with active cell balancing will do a good enough job that it's unlikely that you'll ever need to do a followup top balance; and charging to 3.65v is just going to tear your batteries up and wear them out prematurely, for no benefit.
If you take care of a lifepo4 battery, you'll get 5000-10000 cycles out of that battery, in most cases. That means that even if you're cycling a battery fully, every day, it will take 13-27 years to ever wear it out. Most of us aren't cycling out batteries fully every day, so if you take care of them, these batteries are very likely to have a longer life expectancy than the people who are using them.
More likely that the battery will be obsolete because something better has been invented, than that you'll wear it out through regular use in your adult lifetime, IF you take care of it and put some sane protections in place to prevent unnecessary cell damage.
Делай!
Hello sir..
I am having problem that jk bms going tompshort circuit protection,even there is no problem in load or charge,this inverter is running v good on lead acid battery...but 24v100ah eqquiped with jk bms is creating problem,again &again that short circuit protection....pls advice.what is the sloution
Thank you
Thanks for the video. I have a JK BMS as well and use it for a LiFePO4 4S battery. When I compare it to my JBD BMS and leave it idle (only battery and jk bms) for about a month, I notice that I lose a significant amount of AH with the JK BMS, whereas I don't have this issue with the JBD BMS. The consumption of the JK BMS is dramatically high. Is there anything I can do about this? I have used two of them, and both have shown this problem.
You mean when the battery has no load the JK BMS is discharging the battery rapidly? Or you mean when it has load (which is naturally when the BMS is on)? If there is no load, you can put off the BMS, there is a button for it I think.
Yes when no load, it's drains couple amps per week. With JBD bms I don't have those issues.@@buikemm
what is modify pwd in time ?
Can u say why battery show always 75% remain battery. In your version is 69 or 70. My battery stop on 75% and not get higgher than 3.45v. Is it full already?
Depends on what you put as 100% SOC. If your 100% is 3.45, it should show 100% at 3.45v
In this video you are recommending to charge a battery to 3.55volt/cell or even lover. I fully support this advice. BUT you also recommend to use the BMS to limit the charge voltage by dissable charging at 3.53volt. This do not make any sense and I see that as misleading people comeing here for solid information.
Please revise this advice and let the chargers handle the charging and the BMS to care for the safety of the battery.
If any charger would to fail in some way and try to overcharge the battery, then the BMS should step in and disable charging when a cell hits 3.65volt or whatever ones cells maximum voltage are to be, stated in their datasheet. Not slightly before the charge voltage has been reached. That is just bad practice.
Please show how to calibrate, even if you might have done it in the other video, the BMS for voltage and current so that over voltage protection and over current protection functions as intended instead.
3.0v is too low for balance start. That will overwork the balance circuitry and potentially cause a large imbalance or other issues.
3.375v should be the minimum.
Mine was 3.35 and I changed it to 3.4v
Jesus ..... he either waffles on about inane shit for what seems like hours or bashes out one statement and rolls on without justifying any of it - WTF? For example in his over video from 2 years ago he says - oh yea - Cell OVPR(V) 3.600 is fine its the factory default - NOW he says change it to 3.400 and zooms on without any statement. Shmuck !!