curiouscarbon
Science Penguin
- Joined
- Jun 29, 2020
- Messages
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From March to mid April 2022. Jikong will update and produce a BMS that supports 4S configuration and active balance function,I am starting a thread specific to he Heltec 200A Smart BMS with 2A Active Balance. 200A max charge. 350A max discharge
I have 4 of them and I bought them from the Alibaba Heltec store here - https://www.alibaba.com/product-detail/14-24S-200A-Smart-BMS-with_62544207027.html
edit: I forgot to mention this BMS is the same as JK brand. In fact the JK site has more up to date software that can be downloaded from play store or Apple. Check here for more info - https://www.jkbms.com/
Someone asked me to do a review of this BMS. I am not really ready to do a full review because I am new to DIY batteries and it takes me a long time to test these BMSs thoroughly. I actually have only used one so far. I am just getting ready to set up a second one.
And, I just wanted to start a place specific to this BMS so I can add my thoughts as I learn new information.
Of course I also want to hear from others using this BMS
My highest discharge current so far has only been about 70A and that was for a short time. My highest charge current was about 100A.
I hope to test a sustained discharge rate of at least 100A someday. My planned system would need changes for me to test higher than that and it could be years before I come to the conclusion that I need more amps. I don't expect that day to come but as I said I am new to this so I may change my mind someday.
I am very satisfied with this BMS so far.
The software is great.
The active balance is really cool. I had heard that 2A wouldn't be enough but my findings are that 2A is extremely useful and for my purposes I doubt 5A or 10A would be any better.
2A takes a long time but it keeps cells balanced perfectly. I can use 80% of battery capacity and be confident it will stay balanced. But, a passive balancer could probably do that too.
I love how it balances the cells perfectly whenever charging stops. It does even better when ever I am floating above the balance trigger.
Sometimes it can't completely keep up when charging / discharging high amps.
Sometimes it can't keep up in the knees. But so far it can always keep up enough so I am balanced if I only use 80% capacity and stay out of the knees.
I am very concerned about the needs of customers, so I will watch the forum from time to time and improve it in time according to the correct feedback from customers,If you have any questions, please contact me directly. Thank you. We are the person in charge of hankzor store and can solve the BMS problems of friends Daly, JBD, Jikong and ant,
Nami,If you have any questions, please contact me directly. Thank you. We are the person in charge of hankzor store and can solve the BMS problems of friends Daly, JBD, Jikong and ant,
Nami,
I'm using the 8S 24V, 2A balancing version. I noticed that when the inverter is connected and charging or discharging, the amperage reading in the Android app is fluctuating. I noticed the same with a Daly BMS.
What causes this ( I read something about interference? ) and how can it be solved?
Sorry, I don't understand.The current detection frequency of BMS is twice per second. Since the inverter is generally a sine wave inverter, the current fluctuation is relatively frequent, so the BMS current display will fluctuate greatly. We are preparing to reduce the current acquisition frequency of BMS, which will reduce the fluctuation. The current fluctuation will not affect the balance and protection function of BMS
Sorry, I don't understand.
As far as I can see, the inverter/charger is pulling or pushing a (fairly) steady current. In my test, I was pulling about 1200W 230V AC continually, which was about a 56A pull from the battery (24V DC).
Here's the graph.
Yet, the app was fluctuating wildly, to well above the 56A pull. The JK at least has a delay before shutting down because of an over-current situation, so no problem there are the moment, but I wonder what happens if I pull a higher current and if the current reading will go above the limit (for too long) with the incorrect reading.
View attachment 79471View attachment 79472
So there will be a firmware update for the BMS?I understand your concern. You want to confirm whether BMS will be protected due to current fluctuation, which requires more professional knowledge. I see you use victron inverter. Due to the characteristics of the inverter, the current displayed by the inverter is processed by sine wave, and the BMS collects instantaneous current, so the current collected by the BMS is not completely consistent with the current displayed by the inverter. We have received many similar problems, so we are trying to reduce the acquisition frequency. Thank you
I am starting a thread specific to he Heltec 200A Smart BMS with 2A Active Balance. 200A max charge. 350A max discharge
I have 4 of them and I bought them from the Alibaba Heltec store here - https://www.alibaba.com/product-detail/14-24S-200A-Smart-BMS-with_62544207027.html
edit: I forgot to mention this BMS is the same as JK brand. In fact the JK site has more up to date software that can be downloaded from play store or Apple. Check here for more info - https://www.jkbms.com/
Someone asked me to do a review of this BMS. I am not really ready to do a full review because I am new to DIY
I think one thing I have to remind you is, https://www.jkbms.com/ It is not the official website of Jikong. You can clearly see that the logo of Jikong is different from that on the website. My factory has contacted the person in charge of the website, but there is no result. Thank you for your supportI am starting a thread specific to he Heltec 200A Smart BMS with 2A Active Balance. 200A max charge. 350A max discharge
I have 4 of them and I bought them from the Alibaba Heltec store here - https://www.alibaba.com/product-detail/14-24S-200A-Smart-BMS-with_62544207027.html
edit: I forgot to mention this BMS is the same as JK brand. In fact the JK site has more up to date software that can be downloaded from play store or Apple. Check here for more info - https://www.jkbms.com/
Someone asked me to do a review of this BMS. I am not really ready to do a full review because I am new to DIY batteries and it takes me a long time to test these BMSs thoroughly. I actually have only used one so far. I am just getting ready to set up a second one.
And, I just wanted to start a place specific to this BMS so I can add my thoughts as I learn new information.
Of course I also want to hear from others using this BMS
My highest discharge current so far has only been about 70A and that was for a short time. My highest charge current was about 100A.
I hope to test a sustained discharge rate of at least 100A someday. My planned system would need changes for me to test higher than that and it could be years before I come to the conclusion that I need more amps. I don't expect that day to come but as I said I am new to this so I may change my mind someday.
I am very satisfied with this BMS so far.
The software is great.
The active balance is really cool. I had heard that 2A wouldn't be enough but my findings are that 2A is extremely useful and for my purposes I doubt 5A or 10A would be any better.
2A takes a long time but it keeps cells balanced perfectly. I can use 80% of battery capacity and be confident it will stay balanced. But, a passive balancer could probably do that too.
I love how it balances the cells perfectly whenever charging stops. It does even better when ever I am floating above the balance trigger.
Sometimes it can't completely keep up when charging / discharging high amps.
Sometimes it can't keep up in the knees. But so far it can always keep up enough so I am balanced if I only use 80% capacity and stay out of the knees.
batteries and it takes me a long time to test these BMSs thoroughly. I actually have only used one so far. I am just getting ready to set up a second one.
And, I just wanted to start a place specific to this BMS so I can add my thoughts as I learn new information.
Of course I also want to hear from others using this BMS
My highest discharge current so far has only been about 70A and that was for a short time. My highest charge current was about 100A.
I hope to test a sustained discharge rate of at least 100A someday. My planned system would need changes for me to test higher than that and it could be years before I come to the conclusion that I need more amps. I don't expect that day to come but as I said I am new to this so I may change my mind someday.
I am very satisfied with this BMS so far.
The software is great.
The active balance is really cool. I had heard that 2A wouldn't be enough but my findings are that 2A is extremely useful and for my purposes I doubt 5A or 10A would be any better.
2A takes a long time but it keeps cells balanced perfectly. I can use 80% of battery capacity and be confident it will stay balanced. But, a passive balancer could probably do that too.
I love how it balances the cells perfectly whenever charging stops. It does even better when ever I am floating above the balance trigger.
Sometimes it can't completely keep up when charging / discharging high amps.
Sometimes it can't keep up in the knees. But so far it can always keep up enough so I am balanced if I only use 80% capacity and stay out of the knees.
We will update the acquisition chip of BMSSo there will be a firmware update for the BMS?
Oh darn, no firmware update :-(We will update the acquisition chip of BMS
Use a less sensitive current acquisition chip to reduce the acquisition frequency,
Thank you for your time and answers and good luck solving the issues.We are studying this matter with engineers because we have received many similar problems. The current solution is to reduce the acquisition frequency. Of course, we will also consider the average value you said. Because it is approaching the Chinese new year, we will get the latest upgrade results from February to March,
I'd be happy to help you,Thank you for your time and answers and good luck solving the issues.
Do you have any more specific info on when a 4S version will be available?From March to mid April 2022. Jikong will update and produce a BMS that supports 4S configuration and active balance function,
I have a JK-BMS on my battery bank, and I know exactly what you are talking about. Let me see if I can explain it a little better.I'm using the 8S 24V, 2A balancing version. I noticed that when the inverter is connected and charging or discharging, the amperage reading in the Android app is fluctuating. I noticed the same with a Daly BMS.
What causes this ( I read something about interference? ) and how can it be solved?