JK-B2A24S15P
for 16 x 280Ah Lifepo4JK-B2A24S20P
for 16 x 310Ah Lifepo4abnormal current sensor
abnormal release of current sensor
abnormal current sensor
abnormal release of current sensor
Hi everybody,
I have two JK-BMS
These two batteries are connected in parallel.
JK-B2A24S15P
for 16 x 280Ah Lifepo4JK-B2A24S20P
for 16 x 310Ah Lifepo4
For a few last months everything works fine, but today I spotted on both bms-es "loop" of these two errors as well
abnormal current sensor abnormal release of current sensor abnormal current sensor abnormal release of current sensor
Unfortunately, i didn't check the firmware version.
Does anybody understand what these particular errors means?
Nope, I had this error at around 60-70 SOCWelcome to the mysterious "abnormal current sensor" problem.
Did it occur after a full charge too?
I observe this issue anytime until the battery is full. With the full battery, MPPT delivers power just for the load. At max there are observed negative ripples on the battery end. Thus the condition for alternating positive and negative low frequency sampling of the current are not met. This issue is simply bad design of the current sensor in JK BMS. To have proper coulomb (AH) meter and also current value, there should be about 1 ms sampling of the current flow for the systems with 50/60 Hz output (about 10 times higher than 100/120 Hz ripple frequency propagated from higher loaded inverter where the internal bus and battery capacitors are not able to smooth fluctuations).Welcome to the mysterious "abnormal current sensor" problem.
Did it occur after a full charge too?
I have the same problem. Also my Current Reading on the "Main Page" shows the real current for about 30seconds before dropping down to zero again. But in Reality there are 30A incoming...I could not make out what this "Abnormal current sensor" issue is all about.
View attachment 101265
Any idea?
It comes and goes and I have no idea what is happening.
Thanks
Dan
I have the same problem with a JK with older firmware, is not distance related, my inverter is 4 meters from batteries.I have the same problem with the JKBMS as described in this thread :/
@Dave21 you talked about the inverter too close to the BMS/battery.
I am seeing som strange voltage fluctuation in the BMS when the inverter is on.
Do you think my problem below can be caused by the inverter being too close to the BMS ?
I have made a new thread with pictures and description.
Cell voltage fluctuation
Hi I have a jkbms setup with 8 cells. In this setup I have problems with the voltage measurement on specific cells (measured by the bms). When I measure with a meter the voltage is stable. Below is a picture of cell 7 and 1 voltages over 20min. As you can ser cell 7 is all over the place when...diysolarforum.com
One word: Chinese!!!i'm having the same issue. hopefully it is truly a software issue and none of the hardware is suffering. why in the world the jk has a 50 item limit in the system log and why they use a horrible timestamp notation (timestamp is counting backwards to the fault) -- i cannot for the life of me comprehend why the designers did this.
You are right. I compared my database records with jkbms's "timestamps" and they happened just at the time of changing the current sign (direction)..... They are doing low frequency sampling of the current and then post-processing the sequence of samples to come up with the current reading. If the sequence of samples contains alternating positive and negative values, this error is shown. Such regular fluctuation between positive and negative values happens usually if your inverter load is high enough and is very close to your PV power....
Tanks for this idea......
This error on JK BMS is not causing any issues. It automatically disappear when the fluctuation between positive and negative samples is gone. The only negative effect I found so far is that this affect also the remaining AH capacity calculation inside JK BMS. When this error is active, the remaininig AH capacity is not computed correctly........