LiPoFe4 batteries imported from China

https://www.segeln-forum.de/board1-rund-ums-segeln/board35-bootstechnik-und-elektronik/p2096803-lifepo4-batterien-im-eigenimport/#post2096803

Link to the manufacturer

Link to the product

Data sheet BMS

Lifepo4 Battery Instruction

Worth knowing (German translation)

  • Cheap LiFePo4 batteries imported from China
  • Well-known Chinese manufacturer Bejing XD Batteries with experience in battery construction since 2006
  • 60% Savings compared to products from German retailers
  • CE, UL, ISO9001, RohS certification
  • 5 year guarantee from the Chinese manufacturer
  • By default, a waterproof BMS with 100A is installed at 12V, peak load 300A (+ 50A / 3sec),
    At 24V and 48V standard BMS 150A (peak 450A)
  • higher output possible
  • Up to 4 batteries can be connected and charged in parallel
  • Series connection is not possible (then use the appropriate battery type with a higher voltage)
  • Consists of prismatic cells from Chinese manufacturers
  • Closed, waterproof housing
  • Batteries with flat terminals (screw-on round terminals can be ordered)
  • The configuration of the batteries is variable
    • 12V 100Ah: 326 X 170 X 220 14kg
    • 12V 200Ah: 521 X 238 X 218 22kg
    • 24V 100Ah: 528 X 238 X 218 23kg
    • 24V 200Ah: 483 X 430 X 227 45kg
    • 48V 100Ah: 483 X 225 X 383 46kg
    • 48V 200Ah: 450 X 320 X 250 90kg
  • There were quality problems with some batteries regarding:
    • Incorrect installation position of the cells
    • Fixation of the charging electronics with adhesive tape
    • Space wasted due to oversized housing with foam filling
    • Soldered power cables instead of connections with compression sleeves
    • Loose compression sleeves on power cables
    • Uneven cell charge level on delivery
    • Incorrect display of the battery capacity in the app
    • Sale of user batteries with 1000 charge cycles according to the app
  • Also available with Bluetooth for displaying voltage, current and capacity via an iPhone or Android app (Liontron LX Smart BMS)
    • The Android app is very rudimentary and can do no more than shown in the picture
    • A lot more is possible with the iPhone app

 

Android app from Liontron

 

iPhone app

Pictures of the inside of the battery. As can be seen, only a smaller part of the volume is used in the battery housing and the rest is filled with filling material.

Open housing (above board with BMS and separate Bluetooth module)

Battery pack

DIY boat automation

 

https://www.segeln-forum.de/board194-boot-technik/board35-elektrik-und-elektronik/p2101652-diy-boots-automation/#post2101652

  • Use of components from home automation
  • Connection via WLAN
  • Operation via web browser with mobile phone or tablet
  • Design of your own operating pages with HTML code using predefined widgets and CSS
  • Free configuration of symbols and names via configuration file
  • No JavaScript programming necessary
  • Special open source firmware required for control units (Tasmota)
  • No cloud connection necessary
  • Devices are controlled directly with HTTP commands
  • Device Manager available for device management
  • Big community
  • Well-tested firmware with a wide range of uses
  • Diverse device hardware available
    • 1-channel switch without current measurement
    • 1-channel switch with current measurement 230V AC
    • 4-channel switch potential-free
    • 4-channel switch potential-free with 433MHz radio remote control
    • Valve drive
    • LED light control
    • Temperature sensor
    • Fan
  • Own hardware can be integrated via generic modules
  • Inexpensive from around 30 euros

 

 

 

3D printing for useful parts

https://www.segeln-forum.de/board194-boot-technik/board35-elektrik-und-elektronik/71895-3d-druck/#post2031567

Since 3D printers are cheap to get today, it is worth printing out one or the other useful part yourself. The imagination knows no limits. Basically anything that you need can be printed. But you have to be careful about the strength and sun tolerance of the parts. Not all plastics are suitable for outdoor maritime applications.

There are a large number of printable templates on the Internet that you can use without having to construct anything yourself. A 3D printer can also be used to produce parts that can no longer be procured if something has broken.

On the 3D platform www.tingiverse.com you will find many useful print templates for a wide variety of applications. A small preselection for maritime applications is listed here: