4. Operation and programming
4.1. Operation modes
The BatteryProtect has three operating modes, the appropriate mode can be selected via a programming procedure (see chapter Programming ).
Mode A: Buzzer or LED mode (default).
Mode B: Relay mode.
Mode C: Li-ion mode.
Modes A and B affect the behavior of the alarm output.
Mode C, the Li-ion mode, takes into account lithium batteries that have an external BMS or a BMS with load and/or charge disconnect.
Buzzer or LED mode behaviour
In case of under voltage, a continuous alarm will start after 12 seconds. The BP will disconnect the load after 90 seconds and the alarm will stop. Reconnect delay: 30 seconds.
In case of over voltage, the load will be disconnected immediately and an intermittent alarm will remain on until the overvoltage problem has been corrected. There is no reconnect delay.
Relay mode behaviour
In case of under voltage, the relay will engage after 12 seconds. The BP will disconnect the load after 90 seconds and the relay will disengage.
In case of over voltage, the load will be disconnected immediately and the alarm output will remain inactive. Overvoltage trip levels: 16V (for a 12V system) respectively 32V (for a 24V system).
Li-ion mode behaviour
Only select the Li-Ion mode if your BMS has a load disconnect and/or a charge disconnect output. This is usually not the case for so-called drop-in batteries with internal BMS. For lithium batteries/BMS without load disconnect output, select mode A or B instead.
Connect the load or charge disconnect (depending on application) output of the BMS to the Remote H terminal of the BatteryProtect.
The load or charger is disconnected immediately when the load or charge disconnect output of the BMS switches from ‘high’ to ‘free floating’. The under voltage thresholds and alarm output of the BatteryProtect are inactive in this mode.
It will remain disengaged for 30 seconds, even if it receives a re-engage signal within that time period. After 30 seconds it will respond immediately to a re-engage signal.
4.2. Programming
The BatteryProtect can be programmed by connecting the PROG pin to GND pin method.
4.2.1. Programming via PROG pin to GND pin method
Requirements prior to programming:
The battery positive must be connected to the IN terminal. Do not connect the OUT terminal yet.
The included ground wire must be connected to the battery minus and the GND terminal of the BatteryProtect 12/24V.
The wire loop in the remote on/off terminal block must be removed.
Programming procedure:
Use a wire loop or a wired switch (preferably a push button) between the PROG pin and the GND pin.
While there is a connection between the PROG pin and the GND pin, the 7-segment display will first step through the shutdown and restart voltage combinations, as indicated by the numbers 0..9 (see the Programming table).
Remove the wire loop or release the push button when the desired voltage mode is displayed.
The display will confirm the chosen voltage and default mode (A) twice.
Reconnect the wire loop or press the push button again, if a different operation mode (B, C or D) is required (see the Programming table).
Disconnect the wire loop or release the push button when the required mode is displayed.
The display will confirm the chosen voltage and operation mode twice.
 |
Push button wired to program the BatteryProtect
4.2.2. Programming table
Programming table for BatteryProtect 12/24V
7-segment display | Under voltage shutdown 12V/24V system | Under voltage restart 12V/24V system |
|---|---|---|
0 | 10.5V/21.0V | 12.0V/24.0V |
1 | 10.0V/20.0V | 11.5V/23.0V |
2 | 9.5V/19.0V | 11.5V/23.0V |
3 | 11.25V/22.5V | 13.25V/26.5V |
4 | 11.5V/23.0V | 13.8V/27.6V |
5 | 10.5V/21.0V | 12.8V/25.6V |
6 | 11.5V/23.0V | 12.8V/25.6V |
7 | 11.8V/23.6V | 12.8V/25.6V |
8 | 12.0V/24.0V | 13.0V/26.0V |
9 | 10.0V/20.0V | 13.2V/26.4V |
A | Buzzer or LED mode | |
b | Relay mode | |
C | Lithium mode | |
d | Detect system voltage | |
4.3. Status indicator
The decimal point of the 7-segment display is used for status indication:
Illuminated: the BatteryProtect is attempting to activate the output.
Flash every 5 seconds: output is active.
Flash every 2 seconds whilst in Li-ion mode: output ‘connecting’. When in Li-ion mode the SBP will observe a dead period of 30 seconds after the remote input of the BP has become free floating.
4.4. Remote control and short circuit behavior
This section describes the behaviour of the BatteryProtect when it is controlled via the remote on/off input and when a short circuit has been detected.
The BatteryProtect will connect the load 1 second after the remote input is closed.
The BatteryProtect will disconnect the load immediately when the remote input is opened.
When in Li-ion mode the BP will connect the load 30 seconds after the remote input of the BP has been pulled high by the BMS. This delay increases to 3 minutes in case of frequent switching.
In case of a short circuit, the BatteryProtect will attempt to connect the load every 5 seconds. After two attempts the display will show E1 (short circuit detected).
4.5. Error & Warning modes
There are 4 possible error modes, indicated by the 7-segment display:
E1 Short circuit
E2 Over temperature / P2 Over temperature warning
E3 Under voltage / P3 Under voltage warning
E4 Over voltage
After 5 minutes the error is no longer displayed to reduce current consumption.
Please refer to the appendix chapter Error and Warning codes for more info on each error.