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UPS – Powerbank LifePO4 12V 15AH  3D Printer File Image 1
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UPS – Powerbank LifePO4 12V 15AH

Desmen avatarDesmen

January 5, 2025

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Description

English/Spanish
Translated from Spanish with Google Translator. In Spanish at the end


UPS – Powerbank LifePO4 12V 15AH

  • Direct output with XT60 connector. The maximum output voltage is 14.6v at maximum load and 10v at minimum. The maximum current is 20A, limited by the fuse. It can be used, for example, as a power supply for balanced LIPO battery chargers for FPV drones.
  • USB A and USB C outputs. The USB C has a maximum load of 65w, valid for charging laptops, smartphones, etc.
  • Jack outputs. Sockets stabilized at 12V 5A (it doesn't really reach 4A) to use for example as a UPS for a Router or NAS at home.

Features

  • 4 LIFEPO4 32140 15AH batteries in series
  • BMS with protection against voltage and current overload, short circuit, temperature
  • 4S LIFEPO4 10A battery charger (it really sucks and I have not seen it go over 4A). When it charges the batteries to the maximum it really cuts off earlier, even though it marks 100%) and the batteries stabilize at 75% after a day or two. I should have looked for a better one but the budget was skyrocketing.
  • 4S external active balancer. We ensure that all batteries always have the same voltage - 6th 1.25-30v Boost/Buck converter (regulated to 12V). I have not managed to get it to go over 4A either

Clarifications

  • Do not try to assemble it if you do not have knowledge of electronic and batteries. If you do this it is at your own risk
  • In the 3mf file for the bambu Lab printer: The front plate is printed with a pause in the middle for the color change since I don't have AMS. There are several TPU plugs to fit the battery with the sides of the box
  • The rear switch bypasses the charging diode. In normal mode it should be open. In that case the battery would never be charged to 100% as the diode has a voltage drop of 0.6v and the maximum charging voltage that would reach the batteries would be 14v. If we close it, it would charge at 14.6v (100%) which is less advisable and there would also be a small discharge current through the charger when the power supply was removed. If you want maximum charge, close the switch and once charged and disconnected from the 220v input, put the switch back in the normal position.
  • The charger fan is replaced with a larger one (60x60x15) and placed on the back. The charging LED is unsoldered and placed on the front of the case.
  • I add photos of the assembly, electrical diagram and link to the main components

 
UPS – Powerbank LifePO4 12V 15AH
- Salida directa con conector XT60. La tensión máxima de salida es de 14.6v a la máxima carga y de 10v a la mínima. La corriente máxima es de 20A, limitado por el fusible. Se puede usar, por ejemplo, como alimentación de cargadores balanceados de baterías LIPO para drones FPV.
- Salidas USB A y USB C. El USB C tiene una carga máxima de 65w, valida para cargar portátiles, smartphones, etc.
- Salidas Jack. Tomas estabilizadas a 12V 5A (realmente no llega a 4A) para usar por ejemplo como UPS para un Router o NAS en casa.

Características
- 4 Baterias LIFEPO4 32140 15AH en serie
- BMS Con protección contra sobrecarga de tensión y corriente, cortocircuito, temperatura
- Cargador de baterías 4S LIFEPO4 10A (realmente es una mierda y no le he visto pasar de 4A). Cuando carga las baterías al máximo realmente corta antes, aunque marque el 100%) y las baterías al pasar un día o dos se estabilizan al 75%. Debería haber buscado uno mejor pero el presupuesto se disparaba.
- Balanceador activo externo 4S. Aseguramos que todas las baterías tengan siempre la misma tensión
- Convertidor Boost/Buck 6ª 1.25-30v (regulado a 12V). Tampoco he conseguido que de más de 4A

Aclaraciones
- No intentes montarlo si no tienes conocimientos de electrónica y baterías. Si lo haces es bajo tu propia responsabilidad
- En el fichero 3mf para la impresora bambu Lab: La placa frontal está impresa con una pausa en medio para el cambio de color ya que no tengo AMS. Hay varios tacos de TPU para encajar la batería con los laterales de la caja
- El interruptor trasero puentea el diodo de carga. En modo normal debería estar abierto. En ese caso la batería nunca se cargaría al 100% ya que el diodo tiene una caída de tensión de 0.6v y la máxima tensión de carga que le llegaría a las baterías serían 14v. Si lo cerramos cargaría a los 14.6v (100%) menos aconsejable y además habría una pequeña corriente de descarga a través del cargador cuando se hubiera quitado la alimentación. Si quieres carga máxima cierra el interruptor y una vez cargado y desconectado de la entrada de 220v vuelve a poner el interruptor en posición normal.
- El ventilador del cargador se sustituye por otro más grande (60x60x15) y se situa en la trasera. El LED de carga se desuelda y se pone en el frontal de la caja
- Añado fotos del montaje, esquema eléctrico y enlace a los componentes principales


If you want to pay me a coffee: https://www.paypal.com/paypalme/BlancoR
Si quieres pagarme un café: https://www.paypal.com/paypalme/BlancoR


License:

Creative Commons - Attribution - Non-Commercial - No Derivatives

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