After calibration error appears "I Charge 14"

[Val Burk]

Привет,
прекрасная прошивка , очень удобная, однако при изменении IMAX B6 от 80х5 на 80х80 и также при попытке на 200х200 после калибровки появляется ошибка "I Charge 14".
Вопрос: сопротивления шунтов заряда-разряда и коэффициенты усиления соответствующих операционных усилителей 2904.
Заранее благодарен

Валентин

Нello,
great firmware, very convenient, however, when changing from IMAX B6 80x5 to 80x80 and also when trying to 200x200 after calibration, an error appears "I Charge 14".
Q: Resistance of charge-discharge shunts and gains of respective OP 2904 amps.

Thanks in advance
Valentin

[diggit]

Hi,

> ...when changing from IMAX B6 80x5 to 80x80 and also when trying to 200x200...

I don't understand. What are those numbers? Charging/discharging power? Please elaborate.

>Q: Resistance of charge-discharge shunts and gains of respective OP 2904 amps.

What are you asking about?

> "I Charge 14"

Based on sources, this error means, that your charger theoretical maximum output current is out of measurable range. (out of ADC range)

Did you do any HW changes in charger?

If so, please describe them so we can help you find issue.

[Val Burk]

Добрый день.
Спасибо за быстрый ответ.
Хотел описать как можно короче. Итак: IMAX B6 80 Watt Charger, ATMEGA32A , charge 80Watt, dischage 5Watt. Хотел перейти на прошивку CHEALI....80Watt x 80Watt a затем на CHEALI 200Wx200W. Внес следующие изменения: шунт заряда-0.03 ом, шунт разряда-0.1 ом, сопротивление R62 ( lm2904 заряд)  на 600 ом, сопротивление R7 ( lm2904 разряд) -330ом и получил ошибку(calib. Error I charge 14).
Что сделал не правильно?
Поэтому обратился за помощью.

Good afternoon.
Thanks for the quick response.
I wanted to describe it as briefly as possible. So: IMAX B6 80 Watt Charger, ATMEGA32A, charge 80Watt, dischage 5Watt. I wanted to upgrade to CHEALI firmware .... 80Watt x 80Watt and then CHEALI 200Wx200W. Made the following changes: charge shunt-0.03 ohm, discharge shunt-0.1 ohm, resistance R62 (lm2904 charge) at 600 ohm, resistance R7 (lm2904 discharge) -330 ohm and received an error (calib. Error I charge 14).
What did you do wrong?
Therefore, I asked for help.
Best regards

[diggit]

On Thursday, 3 December 2020 at 13:41:29 UTC+1 valb...@gmail.com wrote:

Добрый день.
Спасибо за быстрый ответ.
Хотел описать как можно короче. Итак: IMAX B6 80 Watt Charger, ATMEGA32A , charge 80Watt, dischage 5Watt. Хотел перейти на прошивку CHEALI....80Watt x 80Watt a затем на CHEALI 200Wx200W. Внес следующие изменения: шунт заряда-0.03 ом, шунт разряда-0.1 ом, сопротивление R62 ( lm2904 заряд)  на 600 ом, сопротивление R7 ( lm2904 разряд) -330ом и получил ошибку(calib. Error I charge 14).
Что сделал не правильно?
Поэтому обратился за помощью.

Good afternoon.
Thanks for the quick response.
I wanted to describe it as briefly as possible. So: IMAX B6 80 Watt Charger, ATMEGA32A, charge 80Watt, dischage 5Watt. I wanted to upgrade to CHEALI firmware .... 80Watt x 80Watt and then CHEALI 200Wx200W.

Good, now I understand your notation.

Increase in discharging capabilities is easier. Electrically, it's just about current sense shunt adjustment (optionally also amplifier gain). Also, you have to improve cooling of discharge transistor significantly. My modified 50W B6 (with increased discharging limits) has all power semiconductor components on GPU heat-sink.

Charging is different problem. You'd have to replace inductor to not saturate it with higher currents.

Made the following changes: charge shunt-0.03 ohm, discharge shunt-0.1 ohm, resistance R62 (lm2904 charge) at 600 ohm, resistance R7 (lm2904 discharge) -330 ohm and received an error (calib. Error I charge 14).

Can you please also link schematic, that you get component references from? Ideally mark your changes there (screenshot with markers is fine).

 

What did you do wrong?

Basically, once you calibrate Icharge, charger checks if maximum Icharge value configured in FW can be measure and it found it can't. That means, MCU ADC will reach maximum (measurable) value on lower current than you defined as maximum Icharge.

Solution is to lower Icharge in FW or decrease shunt value or lower amplifier gain.

[Val Burk]

Спасибо большое за Ваш ответ!
Очень приятно, что мы разговариваем на одном профессиональном языке.
Естественно индуктор поменял. Зарядный  транзистор VT8 , разрядный транзистор VT6 поменял на
STB75NF75LT4 75V 75A. Установил диод Шотки 100V 30A ,всё разместил на большом радиаторе
с двумя вентиляторами.
Схема с измениями:

Thank you very much for your answer!
It is very pleasant that we speak the same professional language.
Naturally, the inductor changed. The charging transistor VT8, the discharge transistor VT6 was changed to STB75NF75LT4 75V 75A. Installed a Schottky diode 100V 30A, placed everything on a large radiator
with two fans.

Modified wiring diagram:

[diggit]

On Friday, 4 December 2020 at 16:57:30 UTC+1 valb...@gmail.com wrote:

Спасибо большое за Ваш ответ!
Очень приятно, что мы разговариваем на одном профессиональном языке.
Естественно индуктор поменял. Зарядный  транзистор VT8 , разрядный транзистор VT6 поменял на
STB75NF75LT4 75V 75A. Установил диод Шотки 100V 30A ,всё разместил на большом радиаторе
с двумя вентиляторами.
Схема с измениями:

Thank you very much for your answer!
It is very pleasant that we speak the same professional language.

It's great to see modders with necessary knowledge!

Naturally, the inductor changed. The charging transistor VT8, the discharge transistor VT6 was changed to STB75NF75LT4 75V 75A. Installed a Schottky diode 100V 30A, placed everything on a large radiator

Keep in mind, that STB75NF75LT4 has on +-15 Vgs. I suggest powering charger from voltage not higher than 12V.

Parametrically speaking, you could left VT6 unchanged (IRFZ44N). Rdson is not mandatory here.

I'd rather choose some TO-247 packaged transistor for easier heat transfer to heat-sink.

I am not sure what is your max Icharge value in FW, but according to math, maximum measurable current is...

(5/(10e3+560)*560)/0.03 = 8.8 A

5V - maximum ADC input

Rest are your component values. I sourced them from schematic and it slightly differs from what you posted earlier.

Always include some margin due to component value tolerances, drift, op-amp offset etc.

If you are targeting Icharge = 10A, I'd go for R62 = 680 R (at least)

Just for check, your theoretical maximum Idischarge

(5/(2e3+300)*300)/0.1 = 6.5 A

 

Once we solve this issue, I hope, that you'll post some photos of your mod and achieved results ;)

[Val Burk]

Доброго Вам Дня.
Немного приболел, поэтому отвечаю с oпозданием.
Эмпирически определил напряжение для Icharge в FW- R62-1,8K. Idischarge  R11-10K ,R7-3,6K.
Icharge 8A попробовал на свинце 12V 52 Ah-без особых проблем.
Idischare довел 7,5А сгорел IRFZ44N, а также шунт в цепи Icharge . Видимо рассеиваемая мощность IRFZ44N не достаточна. Заменю на NCE80H16.
И ещё, для градуировки своих мультиметров использую высокоточную IC REF 5025от TI. Попробую заменить TL431 на неё.
Как только закончу всё, опубликую отчет и фото о достигнутых результатах.

Попробую достичь 200ваттХ 200ватт.

Good day to you. I'm a little sick, so I answer with a delay. I empirically determined the voltage for Icharge in FW-R62-1,8K. Idischarge R11-10K, R7-3.6K. Icharge 8A tried it on 12V 52 Ah lead - no problem. Idischare brought 7.5A burned IRFZ44N, as well as a shunt in the Icharge circuit. Apparently the power dissipation of IRFZ44N is not enough. Replace with NCE80H16. And yet, to calibrate my multimeters, I use the high-precision IC REF 5025 from TI. I will try to replace TL431 with it. As soon as I finish everything I will publish a report and a photo of the results achieved. I will try to reach 200 watts x 200 watts

Best regards

[No_Name]

⁶

    Hello everyone, I have a similar problem, calib.  error I discharge 14, and even during calibration at the Expert Danger point - vb0pin = 0v, although I supply 1.5v between the gnd of the board and vb0, I experimentally determined that I have not a standard board, at least because nothing is connected to 13pin HEF4051BT and  there is an additional operational amplifier LM2904 on the board.  I think there should be a separate firmware for this board, please tell me which one.  Attaching photo.

[No_Name]

воскресенье, 14 февраля 2021 г. в 13:48:44 UTC+3, No_Name:

[No_Name]

воскресенье, 14 февраля 2021 г. в 14:22:17 UTC+3, No_Name:

[diggit]

It looks like a variant with fully differential cell measurement (extra op amp). That is common for 80W chargers. If yours is too, then try `cheali-charger-Dual-Power-B6AC-80W-RC`.

[Val Burk]

Доброго дня!  Хочу сообщить следующее: IMAX B6 50-5Watt конвертировал CHEALY CHARGER, достиг следующих результатов.
Напряжение зарядки литиевых аккумуляторов 25V , максимальный ток зарядки 5А (приблизительно 130 Watt);
Напряжение разрядки 25V , ток 4,5А , около 100-110 Watt
Параметры схемы разрядки соостветствуют параметрам указанным на вашей схеме "150W,200W,400W сharger discharger circuit".
Шунты: заряд - 25 mOm, разряд - 50 mOm
Транзисторы: IRF3205,  IRF4905
При настройки  разрядки сжёг очень много транзисторов IRF3205, пока , наконец, не поставил IRFP4229.
Точную причина выхода из строя транзисторов IRF3205 установит не удалось.
IRFP4229 поставил без изоляции на охладитель графиккарты. Вентилятор охлатителя запитал через DC-DC преобразователь.
В качестве блока питания зарядного устройства использовал блок питания сервера 1KW, выходное напряжение модифицировал до 17,00 Volt
Хотелось бы также заметить, что можно и самому сделать подобное зарядное устройство с нуля, но прелесть идеи состоит в том, что, имея промышленное зарядное устройство, можно довести его до очень хороших показателей.

Good day! I would like to inform you the following: IMAX B6 50-5Watt converted CHEALY CHARGER, achieved the following results.
Lithium battery charging voltage 25V, maximum charging current 5A (approximately 130 Watt);
Discharge voltage 25V, current 4.5A, about 100-110 Watt
The parameters of the discharge circuit correspond to the parameters indicated on your diagram "150W, 200W, 400W charger discharger circuit".
Shunts: charge - 25 mOm, discharge - 50 mOm
Transistors: IRF3205, IRF4905
When setting up the discharge, I burned a lot of IRF3205 transistors, until finally I installed IRFP4229.
It was not possible to establish the exact reason for the failure of the IRF3205 transistors.
IRFP4229 installed graphics cards without insulation on the cooler. The cooler fan is powered through a DC-DC converter.
I used a 1KW server power supply as a charger power supply, modified the output voltage to 17.00 Volt
I would also like to note that you can make a similar charger yourself from scratch, but the beauty of the idea is that, having an industrial charger, you can bring it to very good performance.

[Val Burk]

многоуважаемый DIGGIT ! в модернизированном  IMAX зависает функция "измерение ёмкости акамулятора"В чем причина?

Dear DIGGIT! in the upgraded IMAX the function "measuring the capacity of the battery" freezes What is the reason?

[diggit]

Hi,

do you mean in cheali FW? I did not encounter single freeze while using cheaali FW on several chargers.

Can you be more specific? Video could help.

[Val Burk]

Многоуважаемый DIGGIT ! Посылаю три фотографии. В режиме W (wait) зарядка / разрядка останавливается.

Dear DIGGIT! I am sending three photos. In W (wait) mode, charging / discharging stops.

[Val Burk]

[diggit]

Well, It's expected, that charging/discharging stops for duration of wait phase. This time is for cells to rest before current direction changes to minimize stress on them. Duration of wait is configurable in battery settings.

Once the wait phase passes, charging/discharging should start automatically.