BMS in LG CHEM ESS modules

[floydR]

I see it is well balanced.
I don't know if anyone has shared a smart daly bms settings here
This is for a genric smart bms
low voltagecut off per cell 3.45v battery pack 48.3
you can go lower but not much capacity below 3.4v
high voltage cut off is often set to per cell 3.9v-4.15v Battery pack voltage 54.6v- 58.1v
Can you set when the balance starts? I would start it at 3.8v but from the looks of things you don't need balancing very often at first. 4mv is not a much. usually there is a setting that triggers balancing such as >than 30mv
battery tempature high 60c* low 0c
** I would set this lower probably 50c
Later floyd

 

[matthewjporter]

Hi Guys

Finally got back to these batteries after getting a cable and found/made and one of them has a fault on it. When powering on either on its own or stacked it shows the red light and second blue from the right and are both solid

Reading the manual says the following:
The lowest cell voltage is lower than the tolerance limit. Try these steps:
1. Check the conditions of the battery module using any available method.
2. Manipulate the higher level system to charge the ESS with a current less than or equal to the maximum battery current until the lowest cell voltage is higher than 3 V.
3. Re-activate the ESS when the red indicator turns off. The ESS recharges for 10 minutes before performing a diagnosis after it is activated.

If the problem persists, contact LG Chem for technical assistance.

I have tried contacting LG Chem but no response on email.


I have had the battery connected to my inverter, force charged but the battery just shuts down again

Has anyone got any idea if I could bring this battery back to life?

TIA. Matthew

 

[frogman17]

I just purchased 4 of these LG batteries from battery hookup. I'm wondering if anyone was able to get a BMS to communicate with the data port in the front of the battery or i have to do something like David poz on YouTube did.
Thanks

 

[MrNoo]

Sorry to resurrect this thread, have managed to get hold of 8x EM048218P5BD's the same as the original poster has except mine are 11172Wh and 218Ah. I have the same inbuilt BMS as pictured.
Question is has anyone found a way of using these? I got mine free from a solar farm that was built here, they had 48 they sent for scrap, I managed to get 8 but no more. I was going to use a DALy BMS spliced into the existing BMS wires but would also like to use 2 packs, guessing I would need a DALy for each pack.
Am using a semi off grid inverter 12kw, same as the Voltacon, it is an Iconica.

 

[juz]

Hey all. Are you all happy with these LG chem ESS units? I have 2 of the type from the original post and was going to fit a new BMS with can bus to them and run through a SOFAR ME3000. I'm just a little twitchy as it seems these units are mainly recalls after an incident in the USA where an explosion occurred! (LG CHEM did their own independent investigation after the findings and concluded it wasn't their cells at fault). I'm hoping as so many people seem to still be purchasing and using them, that with a new BMS and some stringent settings they can be kept within safe limits? Any thoughts would be appreciated! Thanks

 

[Thor_Sten]

Hi.
I´m using them since 2 years and have 6 of them.
The problem of explosion was overtemperature by using maximum current for loading.
You can check your serial numbers here: https://www.lgessbattery.com/m/au/home-battery/checkSN.lg
I´m using them with fans in all units, loading them 100% once a month and the maximum loading/charging power is 4600 watts.
They´re running fine with a SMA Sunny Island without any modifications.

 

[juz]

Hi.
I´m using them since 2 years and have 6 of them.
The problem of explosion was overtemperature by using maximum current for loading.
You can check your serial numbers here: https://www.lgessbattery.com/m/au/home-battery/checkSN.lg
I´m using them with fans in all units, loading them 100% once a month and the maximum loading/charging power is 4600 watts.
They´re running fine with a SMA Sunny Island without any modifications.

Hi Thor_Sten,

Thanks for the reply. It puts my mind a ease a little! I think the reason I need a new BMS for mine is I have the slightly different models to yours, (EM048126P3BA) without the lights and comms ports on the front and from what I can see so far, nobody has had any luck communicating with this type? I was definitely going down the fan route and I'm also going to make sure the room is well ventilated just to mitigate any risk from gas build up if there was ever a problem! I'll also check the serial numbers when I get home!

 

[MrNoo]

Hey all. Are you all happy with these LG chem ESS units? I have 2 of the type from the original post and was going to fit a new BMS with can bus to them and run through a SOFAR ME3000. I'm just a little twitchy as it seems these units are mainly recalls after an incident in the USA where an explosion occurred! (LG CHEM did their own independent investigation after the findings and concluded it wasn't their cells at fault). I'm hoping as so many people seem to still be purchasing and using them, that with a new BMS and some stringent settings they can be kept within safe limits? Any thoughts would be appreciated! Thanks

Well they've just used 49Mw worth of them here on a new build solar farm, I think if there were issues then they wouldn't be using them, especially for what the storage cost.
Mine are EM048218P5BD's, I sold one and the chap has connected up a JK BMS and I believe has just connected yesterday (although weather been lousy here yest and today, so hopefully I should know how he gets on soon, sun forecast tomorrow.

 

[juz]

Well they've just used 49Mw worth of them here on a new build solar farm, I think if there were issues then they wouldn't be using them, especially for what the storage cost.
Mine are EM048218P5BD's, I sold one and the chap has connected up a JK BMS and I believe has just connected yesterday (although weather been lousy here yest and today, so hopefully I should know how he gets on soon, sun forecast tomorrow.

Hi MrNoo, I think they’ve changed the way they are manufactured now. The recall ones contained cells manufactured between 2017 and September 2019 and I think mine are September 2019 (if I’m reading the serial number correctly!) LG Chem insist they are not faulty and “can become warm in extreme conditions” or something along those lines. But then they recalled them, so……
It does seem that quite a lot of people are using them still without issue though. Weather is also awful here atm (UK) which is a big reason why I want some battery assistance on my bills while the solar panels are being lazy

 

[juz]

So I finally received my SEPLOS BMS from China in the week and gave it a quick test yesterday! For the connection to the battery I removed the stock BMS and hacked off the connector to solder the wires onto it as shown. No inverter/charger set up yet, but I can communicate with the battery and see the cells/temperatures so we’re off to a start at least. Just waiting on my 3D printer to print a case for the BMS!

 

[juz]

Thermistor cables extended and taped to cells. BMS enclosure printed and fitted. If anybody else is thinking of using the same BMS the enclosure is on Thingiverse and it’s absolutely perfect.

 

[juz]

So I’m all up and running. Just testing the capabilities of one ESS before I start purchasing the bits to connect the second. I’m also waiting on an active balancer to arrive as one big issue with the Seplos BMS is it’s balancing is awful! One question. Does anybody have a source or have for sale in the W0ss’ breakout boards for these ESS’ in the UK? Thanks.

 

[ehamstad]

They are the 9.6kwh. There is no RJ48 on them that I can find. There is a pair of 8 pin connector's on the front though. If you have any other info or could PM me a link I would appreciate it.
Thanks,
Will


View attachment 8050

Is there any information about the pin out of the 8-pin connector?

 

[topsolar2023]

I've 4 modules.
At the beginning 2 were quite empty, but BMS has managed it.

Hi,

Which inverter are you using?. I have three batteries and I want to connect to MPP-Solar Inverter

MPP Solar Inc » PIP-MT SERIES (Dual Output)

www.mppsolar.com

MPP Solar PIP-6048MT

Do you know the full pins configuration for the battery? I don't know if my inverter will be able to work with CanBus as it needs update or later model. However, I want to try RS485.


Thanks

 

[topsolar2023]

So I’m all up and running. Just testing the capabilities of one ESS before I start purchasing the bits to connect the second. I’m also waiting on an active balancer to arrive as one big issue with the Seplos BMS is it’s balancing is awful! One question. Does anybody have a source or have for sale in the W0ss’ breakout boards for these ESS’ in the UK? Thanks.

View attachment 28912View attachment 28915View attachment 28913View attachment 28914View attachment 28916

Hi,

How is the progress with these? I have three batteries and wanted to removed the stock BMS and install a new BMS to be able to communicate with MPP solar inverter.

Thanks

 

[jerryqiu]

Hi,

How is the progress with these? I have three batteries and wanted to removed the stock BMS and install a new BMS to be able to communicate with MPP solar inverter.

Thanks

Hi this Jerry from offical Seplos. Our BMS can communicate with MPP solar inverter (as rebrand of Voltronincs) via RS485 communication.

 

[juz]

Hi,

How is the progress with these? I have three batteries and wanted to removed the stock BMS and install a new BMS to be able to communicate with MPP solar inverter.

Thanks

Hi,

Seems to be working ok. It's hard to tell at the minute as the sun is refusing to shine in the UK atm! The only Issue I've had with the seplos is that the software uses the negative from a different cell to the stock BMS to calculate the voltages, so for a while I was getting incorrect voltages from the software (so it looked like I had a massive voltage delta). I changed the negative to the positive position of the cell the Seplos requires and it improved the readings greatly, although they are not 100% consistent with readings taken from a voltage checker directly on the pack! I've also added a little compensation point in the software (as advised by Seplos engineer) and this has bought it closer again. When the sun eventually decides to shine enough to put a good charge into the pack I will play around again. Beginning to wish I'd bought a wind turbine rather than solar panels

 

[OffGridLG]

Yes, I´ve made up both cables.
The type designation depends on the seller. Sometimes they called the 10P10C RJ45 or RJ48, but it´s a RJ50.
For you it´s important that the battery has 10 pins !

Thorsten, any chance you know the CANbus protocol the LG rack battery is using?

 

[OffGridLG]

All good, it is the same keep-alive signal as the LG RESU series of batteries, though it doesn't probe the bus every second like the RESU does. The rack mount battery responds with voltage/SOC/Health etc after you issue the keep alive command. Issue it once a second to be safe.

CANbus2.0 protocol, 11-bit Address (standard mode), 500kbps data speed. Keep alive packet: 00000305 8 00 00 00 00 00 00 00 00 (Address 305), 8byte payload, all 0x00's.

Refer to https://www.photovoltaikforum.com/t...ms-von-lg-chem-resu-6-4ex-nedap-sma/?pageNo=2 for more information.

Hope this helps the next person!

 

[waza007]

So, Just to make sure I am getting this. I have attached my invert pinouts from the solax manual and guess this is exactly what the "converter" is doing in the SolaX case

I am going to get made up the following up for the inverter to battery

Inverter - Battery:
PIN 1 - PIN 8
PIN 2 - PIN 6
PIN 6 - PIN 1 ?

Which is the ground pin on the battery side. Is it the same as the intra-battery cable? Am going to get the connector and multimeter so will find out soon

Just wanted to be 100% as I am gettign them made up rather than doing myself this time

The Intra-Battery seems straight forward, well crossed over but you know what i mean
PIN 1 - PIN 1
PIN 9 - PIN10
PIN 10 - PIN 9

Thank you so very much for the pin out info... been searching for the last few weeks to make my LG batteries work with my new SP Pro