ScrotpusGobbleBottom
Corn Pop was a bad dude.
If that would be easy enough. I would like that for sure!
I am using one shunt per battery and one for total
YamBMS JK-BMS-CAN with new Cut-Off Charging Logic (open-source)
- Thread starter Sleeper85
- Start date
I am using one shunt per battery and one for total
I use this component:
GitHub - KinDR007/VictronMPPT-ESPHOME: Victron Mppt charger ve.direct to esphome node
Victron Mppt charger ve.direct to esphome node. Contribute to KinDR007/VictronMPPT-ESPHOME development by creating an account on GitHub.
github.com
Perfect. I have extra jst/wire from my other Victron esp32 project. Just need to map it to an open pin on the S3 with yambms. Will work on this after more testing of non shunt solution.I use this component:
GitHub - KinDR007/VictronMPPT-ESPHOME: Victron Mppt charger ve.direct to esphome node
Victron Mppt charger ve.direct to esphome node. Contribute to KinDR007/VictronMPPT-ESPHOME development by creating an account on GitHub.
@Sleeper85
I'm aware that I'm likely part of a very small group with a 15s battery pack. My solar system is installed in my home country, and recently, one of the cells failed, so I had a friend remove it.
The challenge I'm facing is that the minimum absorption voltage (among other settings) is fixed at 54, which isn't suitable for my 15s pack. As a result, I need to modify the YAML configuration to adjust the minimum value to fit my pack's range.
While this is a minor issue, it requires me to manually change these values with each update. Would it be possible to expand the default range to accommodate a wider variety of setups like mine?
I'm aware that I'm likely part of a very small group with a 15s battery pack. My solar system is installed in my home country, and recently, one of the cells failed, so I had a friend remove it.
The challenge I'm facing is that the minimum absorption voltage (among other settings) is fixed at 54, which isn't suitable for my 15s pack. As a result, I need to modify the YAML configuration to adjust the minimum value to fit my pack's range.
While this is a minor issue, it requires me to manually change these values with each update. Would it be possible to expand the default range to accommodate a wider variety of setups like mine?
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ScrotpusGobbleBottom
Corn Pop was a bad dude.
Im in this unfortunate group as well. This REALLY sucks as I bought all the stuff I needed for this, this morning.
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ScrotpusGobbleBottom
Corn Pop was a bad dude.
What would you like for an absorbtion voltage? I think the low could be 51.75 or maybe 50.75 or even 50?
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I currently use 51.8v which is roughly 3.45v per cell. I adjusted all the minimum ranges down to 49v.
You can edit the yaml as I did.
ScrotpusGobbleBottom
Corn Pop was a bad dude.
Yes, I will dutifully.
@Fahmula @ScrotpusGobbleBottom
Sorry, I will adapt the application to make it easier for you. It is not as simple as changing the minimum value to 50.0V because this value cannot be lower than the number of cells in series * 3.37V for LFP.
I already have an idea to do this better.
Sorry, I will adapt the application to make it easier for you. It is not as simple as changing the minimum value to 50.0V because this value cannot be lower than the number of cells in series * 3.37V for LFP.
I already have an idea to do this better.
Testing it now. Setting BMS parameters from HA it's a huge step forward, like this broadcast button and debug parameters.
Excellent job guys!
@Sleeper85 Consider registering on https://buymeacoffee.com/ so people can send some coffee's to You
widget4145
New Member
I agree, he needs a button for that. I believe lots of people here are willing to buy him a beer. He well deserve it, and all other contributors.Testing it now. Setting BMS parameters from HA it's a huge step forward, like this broadcast button and debug parameters.
Excellent job guys!
@Sleeper85 Consider registering on https://buymeacoffee.com/ so people can send some coffee's to You
gfjardim
New Member
@Sleeper85, one question: I saw that the inverter offset voltage is summed with n the requested charge voltage; isn’t the case of adding the offset on the battery total voltage?
No, the Inverter offset V. is used to correct the offset between inverter and BMS to reach the target Bulk voltage (55.2V by default). The offset is not counted in the charging logic, the goal is to reach 55.2V on the BMS side.
@Sleeper85 Consider registering on https://buymeacoffee.com/ so people can send some coffee's to You
Good idea, I'll think about it.
@MrPablo @shvm @Der_Hannes and other
@Fahmula @ScrotpusGobbleBottom
To simplify and meet the different configurations 15S/16S or LFP/Li-ion/LTO I think I will remove a lot of options to modify before compiling by something simpler. The default values will be automatically calculated according to the battery chemistry and the number of cells.
I will take safe values as defaults like for example for LFP :
If I take the example of a 15S LFP the values will be:
What do you think?
Now :
After :
@Fahmula @ScrotpusGobbleBottom
To simplify and meet the different configurations 15S/16S or LFP/Li-ion/LTO I think I will remove a lot of options to modify before compiling by something simpler. The default values will be automatically calculated according to the battery chemistry and the number of cells.
I will take safe values as defaults like for example for LFP :
- Bulk : 3.45V
- Float : 3.35V
- Rebulk : 3.3V
- Absorption Offset : 0.1V
- Inverter Offset V. : 0.0V
If I take the example of a 15S LFP the values will be:
- Bulk min : 3.37 * 15 = 50.55V
- Bulk max : 3.65 * 15 = 54.75V
- Bulk default : 3.45 * 15 = 51.75V
What do you think?
Now :
YAML:
yambms1: !include
file: packages/yambms/yambms.yaml
vars:
# Please read the cut off charging logic README to understand how the YamBMS works
yambms_id: 'yambms1'
yambms_name: 'YamBMS 1'
yambms_update_interval: '1s'
# Input numbers can be displayed as a slider or an input box, options are 'slider' or 'box'.
yambms_input_number_mode: 'slider'
# Number of cells in series, 16S by default
# In the case where a cell is defective with a BMS reporting one cell less than reality, this avoids sending bad charging parameters to the inverter.
yambms_cell_count: '16'
# Bulk / Absorption Voltage : corresponds to the Bulk voltage that will be used to charge the battery. (55.2V = 3.45V/Cell for 16S battery)
yambms_bulk_v: '55.2'
# Float Voltage : corresponds to the voltage at which the battery would be maintained at the end of the absorption phase. (53.6V = 3.35V/Cell for 16S battery)
yambms_float_v: '53.6'
# Rebulk voltage, voltage less than FLOAT at which BMS requests rebulk. (52.8V = 3.3V/Cell for 16S battery)
yambms_rebulk_v: '52.8'
# Allows the charging process to complete within 30 minutes even if the cells are still equalizing
# This timer can be deactivated with a switch
yambms_eoc_timer: '30'
# Time in seconds during which the end of charge conditions must be respected (cut-off + cells not equalizing)
yambms_cutoff_timer: '60'
# Absorption Offset V.
yambms_absorption_offset_v: '0.1'
yambms_absorption_offset_v_slider: 'false' # true: the slider is hidden, false: the slider is available
# Inverter Offset V. allows you to correct the inverter charging voltage.
# Requested Charging Voltage = Bulk. V + Inverter Offset V.
yambms_inverter_offset_v: "0.1"
yambms_inverter_offset_v_slider: 'false' # true: the slider is hidden, false: the slider is available
# Maximum charging cycles is used to calculate the battey SOH, LF280K v3 =8000.0, LF280K v2 =6000.0, LF280=3000.0 (decimal is required)
yambms_max_cycles: '6000.0'
# Cutoff Charging Logic
yambms_cutoff_cvmin: '3.37' # LFP 3.37 - Li-ion 3.90
yambms_cutoff_cvmax: '3.65' # LFP 3.65 - Li-ion 4.20After :
YAML:
yambms1: !include
file: packages/yambms/yambms.yaml
vars:
# Please read the cut off charging logic README to understand how the YamBMS works
yambms_id: 'yambms1'
yambms_name: 'YamBMS 1'
yambms_update_interval: '1s'
# Input numbers can be displayed as a slider or an input box, options are 'slider' or 'box'.
yambms_input_number_mode: 'slider'
# Battery Chemistry
yambms_battery_chemistry: '1' # 1-LFP | 2-Li-ion | 3-LTO
# Number of cells in series, 16S by default
# In the case where a cell is defective with a BMS reporting one cell less than reality, this avoids sending bad charging parameters to the inverter.
yambms_cell_count: '16'
# Allows the charging process to complete within 30 minutes even if the cells are still equalizing
# This timer can be deactivated with a switch
yambms_eoc_timer: '30'
# Time in seconds during which the End Of Charge conditions must be respected (cut-off + cells not equalizing)
yambms_cutoff_timer: '60'
# Maximum charging cycles is used to calculate the battey SOH, LF280K v3 =8000.0, LF280K v2 =6000.0, LF280=3000.0 (decimal is required)
yambms_max_cycles: '6000.0'ScrotpusGobbleBottom
Corn Pop was a bad dude.
widget4145
New Member
Good idea. As long as invidual/previous values are still configurable for some "weird" requirements in separate yaml or whatever.
I think I might have already recommended this beginning of the year
For anyone who wants to use this board i just want to let you know that this RS485 board does have 120ohm termination but this is not active unless you bridge the contacts circled in red.
Shazhenla
New Member
Hi everyone, I have little experience and I need help with YamBMS. In stock 2 Jk-PB BMS. 32 Batteries EVE 280.
I'm confused about what to buy for YamBMS.
YamBMS works fine with resistive balancer? Is it possible to set up balancing on a schedule?
I want to use a Victron smart shunt. Can you tell me what components I need to buy? The solar station is under construction. Inverter Deye SUN-12K-SG02LP1-EU-AM3
I don't know English, I use a translator.
I'm confused about what to buy for YamBMS.
YamBMS works fine with resistive balancer? Is it possible to set up balancing on a schedule?
I want to use a Victron smart shunt. Can you tell me what components I need to buy? The solar station is under construction. Inverter Deye SUN-12K-SG02LP1-EU-AM3
I don't know English, I use a translator.
Atom S3 + Atomic CAN base + RS485 unit
The easiest solution but with the disadvantage of having few GPIOs would be what I showed in the links above.
This solution is able to supervise several JK-PB BMS on a RS485 bus and a shunt (requires soldering two wires on the Atomic CAN base).
Why do you want to add balancers when there is already an active balancer in the JK-PB?
Atom S3 Lite can be replaced by Atom S3 which has a screen.
I also invite you to read the documentation, I put the links on the first post of this topic.
Shazhenla
New Member
I don't like using active balancer for batteries LiFePO4
The previous station uses a 7A passive balancer. It works well.
I read the documentation. I didn't understand which pins to connect to Victron smart shunt.
Sorry for asking stupid questions. This is my first time working with ESP32.
The previous station uses a 7A passive balancer. It works well.
I read the documentation. I didn't understand which pins to connect to Victron smart shunt.
Sorry for asking stupid questions. This is my first time working with ESP32.
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