The SK48v100 has many menus displaying important information regarding pack statuses. Here’s the layout/flowchart:

Screen Timeout

The screen will automatically turn off after 30 seconds of inactivity. Press the “Menu” button to re-activate the screen.

Controls

Four buttons to the right of the screen exist to provide simple navigation.

  • Menu – Returns to the main menu
  • Enter – Selects the current option
  • Down – Progress through options (and/or pages)
  • ESC – Escape to previous screen

An arrow on the left side of the screen indicates which option is in queue for selection. Use the “Down” button to progress through options and then use the “Enter” button to progress with your selection. If you wish to go back a page, simply use the “ESC” button, or press the “Menu” button to return to the main menu.

Home / Welcome Screen

The default screen shown when BMS is powered on. The only option on this screen is to press the “Menu” button to view the main menu.

Main Menu

Four menu options exist on the main menu:

  • Analog Info – Information such as voltages, state of charge, temperature, etc.
  • BMS Status – Options to view current state of operation, protection status and number of times a protection has tripped.
  • Parameter Settings – Reserved for future features
  • System Settings – View communication baud rate

Analog Info

The analog info section displays analog information such as voltages, temperature, state of charge & battery capacity. Two readouts and three menu options exist on the Analog Info screen.

  • Pack Voltage – The total voltage of the pack, as measured internally
  • Im (Pack Current) – Display of amperage entering or exiting the pack
  • Temperature – Displays a 2-page submenu displaying 6 temperature measurements within the pack. There are 4 cell temperature sensors, a temperature sensor on the circuit board of the BMS, as well as an ambient temperature sensor that can be viewed here.
  • Cell Voltage – Displays a 4-page submenu displaying the individual voltages of each of the 16 cells. The “Down” button is used to scroll between each page of voltages.
  • Cell Capacity – Displays a single-page submenu showing the current state of charge (SOC), Full-Charge-Capacity (FCC), remaining capacity (Rm) and total number of cycles (CC).

BMS Status

BMS Status refers to the current operation mode and any active protections. The menu contains 1 indicator and two submenus.

  • Status – Displays 4 potential status – Charging, Discharging, Idle & Fault. A fault can be either of many scenarios, you can see which fault is active by viewing the second “BMS Status” submenu.
  • Records – Displays a count of how many times a protection has triggered. Abbreviations as described below.
  • BMS Status – Displays any active faults. Abbreviations as described below.

Meaning of “BMS Status” abbreviations

Two levels of statuses exist; Warning & Protection. When a warning setpoint is reached, the battery will continue to operate, so long as the protection setpoint is not reached. In a system setup with closed-loop communications with an inverter, when a warning setpoint is reached the battery will command the inverter to slow or stop to prevent a complete shutdown.

  • OT / OTP – Over Temperature. If the battery is too hot or too cold, at various setpoints the BMS will prevent charging or discharging to protect the cells from damage.
  • OV / OVP – Over Voltage.
  • UV / UVP – Under Voltage.
  • OC / OCP – Over Current. OCP means that more than the rated 100A has been drawn from the battery. Since the battery / BMS is only rated to deliver 100A, the BMS protects the system from damage caused by too much load.
  • SCP – Short Circuit Protection. SCP means that either the DC system has a short circuit, the pre-charge function was not used correctly, or an inverter / set of inverters with a capacitance exceeding the capability of the pre-charge circuit has been connected. This can always be reset by applying charge current to the battery, or can be reset up to 3 times by restarting the BMS (using the RST button). After 3 failed attempts to restart, the BMS will lock out to prevent damage to itself.
  • Failure

Video