Power management circuit, intelligent terminal, and charging method

Patent metadata

Field	Value
Publication number	US-11005273-B2
Application number	US-201615756985-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Sep 2, 2015
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

The present disclosure relates to a power management circuit including a control circuit, a first switch module, a second switch module, and a voltage conversion circuit. A first input end of the control circuit receives a main battery activeness detection signal, a first output end is connected to an enabling end of the second switch module which is connected to the voltage conversion circuit and an energy recovery component, and a second output end is connected to an enabling end of the first switch module which is connected to the voltage conversion circuit, a secondary battery, and a main battery. According to the received activeness detection signal, a channel used by the energy recovery component to charge the secondary battery is connected, or a channel used by the secondary battery or the energy recovery component to charge the main battery is connected.

First claim

What is claimed is:

1. A power management circuit, wherein the power management circuit comprises a control circuit, a first switch module, a second switch module, and a voltage conversion circuit;
the control circuit comprises a first input end, a first output end, and a second output end, wherein the first input end is configured to receive a main battery activeness detection signal, the first output end is connected to an enabling end of the second switch module, and the second output end is connected to an enabling end of the first switch module;
the first switch module is connected to the voltage conversion circuit, a secondary battery, and a main battery;
the second switch module is connected to the voltage conversion circuit and an energy recovery component; and
according to the received main battery activeness detection signal, the control circuit controls the first switch module to be closed or opened, and controls the second switch module to either not receive any-signal, or receive a valid signal or an invalid signal, wherein when the valid signal is received by the second switch module and the first switch module is controlled to be opened, the second switch module is caused to be in a first state where a first channel used by the energy recovery component to charge the secondary battery is connected, and wherein invalid signal is received by the second switch module and the first switch module is controlled to be opened, the second switch module is caused to be in a second state where a second channel used by the secondary battery or the energy recovery component to charge the main battery is connected.

2. The power management circuit according to claim 1 , wherein when the main battery activeness detection signal received by the control circuit is an invalid detection signal, the control circuit controls the first switch module to be closed and controls the enabling end of the second switch module not to receive any signal; and when the second switch module is in the first state, the energy recovery component and the voltage conversion circuit is connected, and the voltage conversion circuit converts a voltage signal received from the energy recovery component and outputs the voltage signal to the secondary battery, so that the channel used by the energy recovery component to charge the secondary battery is connected.

3. The power management circuit according to claim 1 , wherein
when the main battery activeness detection signal received by the control circuit is a valid detection signal, the control circuit controls the first switch module to be opened and controls the enabling end of the second switch module to input the second signal comprising the valid signal; and when, the second switch module is in the second state, the control circuit and the voltage conversion circuit is connected, and the voltage conversion circuit converts a voltage signal received from the secondary battery and outputs the voltage signal to the main battery, so that the channel used by the secondary battery to charge the main battery is connected.

4. The power management circuit according to claim 1 , wherein
when the main battery activeness detection signal received by the control circuit is a valid detection signal, the control circuit controls the first switch module to be opened and controls the enabling end of the second switch module to input the second signal comprising the invalid signal; and
when the second switch module is in the second state, the energy recovery component and the voltage conversion circuit is connected, and the voltage conversion circuit converts a voltage signal received from the energy recovery component and outputs the voltage signal to the main battery, so that the channel used by the energy recovery component to charge the main battery is connected.

5. A charging method, wherein the method comprises:
receiving, by a first input end of a control circuit, a main battery activeness detection signal; and
according to the received main battery activeness detection signal, controlling a first switch module to be closed or opened, and controlling a second switch module to either not receive any signal, or receive a valid signal or an invalid signal, wherein when the valid signal is received by the second switch module and the first switch module is controlled to be opened, the second switch module is caused to be in a first state where a first channel used by the energy recovery component to charge the secondary battery is connected, and wherein invalid signal is received by the second switch module and the first switch module is controlled to be opened, the second switch module is caused to be in a second state where a second channel used by the secondary battery or the energy recovery component to charge the main battery is connected.

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Ruimin
• Qin Muyun
• Jiang Jianhui
• Qi Shaomin

Classifications

• H02J2105/44

  Portable electronic devices · CPC title

• H02J7/50 Primary

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title

• H02J7/342

  The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68) · CPC title

• H02J7/007

  Electricity · mapped topic