Post History
I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to imple...
#7: Post edited
by
Lorenzo Donati
·
2023-08-10T17:10:40Z (over 1 year ago)
Retagged.
#6: Post edited
by
Stefan
·
2022-08-03T08:22:43Z (over 2 years ago)
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- **EDIT:**
Would this circuit work?- 
- The trigger threshold is 4 V, so that when the battery voltage goes to 6 V the [voltage supervisor](https://datasheet.lcsc.com/lcsc/1811141747_onsemi-CAT809JTBI-GT3_C328025.pdf) will set the reset voltage to 0 V turning the upper MOSFET off.
- Another question, what will be the difference if instead of 10 kOhm and 20 kOhm, 10-times bigger values would be used?
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- **EDIT:**
- Would this circuit work? **EDIT 2.0:** The load and battery cells are supposed to be switched in this schematics.
- 
- The trigger threshold is 4 V, so that when the battery voltage goes to 6 V the [voltage supervisor](https://datasheet.lcsc.com/lcsc/1811141747_onsemi-CAT809JTBI-GT3_C328025.pdf) will set the reset voltage to 0 V turning the upper MOSFET off.
- Another question, what will be the difference if instead of 10 kOhm and 20 kOhm, 10-times bigger values would be used?
#5: Post edited
by
Stefan
·
2022-07-28T14:27:37Z (over 2 years ago)
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- **EDIT:**
- Would this circuit work?
- 
The trigger threshold is 4 V, so that when the voltage goes to 6 V the [voltage supervisor](https://datasheet.lcsc.com/lcsc/1811141747_onsemi-CAT809JTBI-GT3_C328025.pdf) will set the reset voltage to 0 V turning the upper MOSFET off.- Another question, what will be the difference if instead of 10 kOhm and 20 kOhm, 10-times bigger values would be used?
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- **EDIT:**
- Would this circuit work?
- 
- The trigger threshold is 4 V, so that when the battery voltage goes to 6 V the [voltage supervisor](https://datasheet.lcsc.com/lcsc/1811141747_onsemi-CAT809JTBI-GT3_C328025.pdf) will set the reset voltage to 0 V turning the upper MOSFET off.
- Another question, what will be the difference if instead of 10 kOhm and 20 kOhm, 10-times bigger values would be used?
#4: Post edited
by
Stefan
·
2022-07-28T14:21:58Z (over 2 years ago)
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load?- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
- **EDIT:**
- Would this circuit work?
- 
- The trigger threshold is 4 V, so that when the voltage goes to 6 V the [voltage supervisor](https://datasheet.lcsc.com/lcsc/1811141747_onsemi-CAT809JTBI-GT3_C328025.pdf) will set the reset voltage to 0 V turning the upper MOSFET off.
- Another question, what will be the difference if instead of 10 kOhm and 20 kOhm, 10-times bigger values would be used?
#3: Post edited
by
Stefan
·
2022-07-28T11:01:05Z (over 2 years ago)
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load?
Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, and if so how?- Or is there a better solution to this problem?
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, with a simple voltage divider?
- Or is there a better solution to this problem?
#2: Post edited
by
Stefan
·
2022-07-27T16:21:38Z (over 2 years ago)
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load?
Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf), and if so how?- Or is there a better solution to this problem?
- I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit.
- Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:
- 
- What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load?
- Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf) or [TPS3840](https://www.ti.com/lit/ds/symlink/tps3840.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1658938815658&ref_url=https%253A%252F%252Fcz.mouser.com%252F) or other, and if so how?
- Or is there a better solution to this problem?
#1: Initial revision
by
Stefan
·
2022-07-27T14:59:38Z (over 2 years ago)
Battery protection circuit
I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to implement reverse battery protection into the circuit. Since n-channel MOSFETs will be used for the [H-bridge](https://electrical.codidact.com/posts/286654), therefore I want to use one for the reverse battery protection as well:  What kind of IC can be used to drive the [MOSFET](https://www.vishay.com/docs/76789/sira14bdp.pdf), so that when the voltage drops below 6.2 V the battery disconnects from the load? Is it possible to use a low voltage detector, for example [R311x](https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r3111-ea.pdf), and if so how? Or is there a better solution to this problem?