A battery system solution. Can I combine these all together?

The application is a system using a 10-cell NiMH battery pack. It should have push-on button, battery over-discharge protection, battery charging circuit, fuel gauge etc.

For battery charging part, i choose LTC4011, please see its demo board circuit below

 

For the push-on button and battery protection part, please see the picture below.

Can I put these two part of circuits all together?

Do I put the second part of the circuit into System Load socket "E1" in the picture 1?

For picture 1, when no Voltage Vin, I assume the battery will support the system load working? Is that right?

Thanks and kind regards,

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  • Hello,

    The idea is that as soon as the charger is plugged-in, the battery will start charging. No switch for this charging circuit. But I assume the charging circuit IC LTC4011 will control the charging process when fully charged, it will shut down the charging process. Am I right?

    That is correct. Based on your requirements, it should work to simply put the push button switch between the LTC4011's system output (E1) and your load. The battery will start charging as soon as VIN is connected, but the load will not be powered until you press the push button.

    The LTC4231's UV threshold will be monitoring the system output voltage which will either be sourced by VIN or the battery. Since VIN is always greater than the battery's full charge voltage, VIN will always be allowed to power the system load given that you have pressed the push button. The battery will be able to power the system load after the push button is pressed until its voltage drops below your UV threshold.

    Regards,

    Zack

Reply
  • Hello,

    The idea is that as soon as the charger is plugged-in, the battery will start charging. No switch for this charging circuit. But I assume the charging circuit IC LTC4011 will control the charging process when fully charged, it will shut down the charging process. Am I right?

    That is correct. Based on your requirements, it should work to simply put the push button switch between the LTC4011's system output (E1) and your load. The battery will start charging as soon as VIN is connected, but the load will not be powered until you press the push button.

    The LTC4231's UV threshold will be monitoring the system output voltage which will either be sourced by VIN or the battery. Since VIN is always greater than the battery's full charge voltage, VIN will always be allowed to power the system load given that you have pressed the push button. The battery will be able to power the system load after the push button is pressed until its voltage drops below your UV threshold.

    Regards,

    Zack

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