Charging control apparatuses, devices to be charged, and charging control methods

Patent metadata

Field	Value
Publication number	US-11837892-B2
Application number	US-201816968031-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Oct 30, 2018
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A charging control apparatus, a device to be charged, and a charging control method are provided. The charging control apparatus includes: a first charging channel configured to charge a plurality of cells coupled in series according to a charging signal provided by a first-type power supply device; a second charging channel configured to charge a part of the cells in the plurality of cells according to a charging signal provided by a second-type power supply device; and an equalizing circuit configured to equalize a voltage of the plurality of cells during an operating process of the second charging channel.

First claim

What is claimed is:

1. A charging control apparatus, comprising:
a first charging channel, configured to charge a plurality of cells coupled in series according to a charging signal provided by a first-type power supply device;
a second charging channel, configured to charge a part of the plurality of cells according to a charging signal provided by a second-type power supply device;
an equalizing circuit, configured to equalize voltages of the plurality of cells; and
a control circuit, configured to turn on the second charging channel and the equalizing circuit when it is detected that the second-type power supply device is coupled to the charging control apparatus.

2. The charging control apparatus of claim 1 , wherein,
the control circuit is further configured to determine a magnitude of an equalizing current in the equalizing circuit according to a magnitude of a charging current provided by the second-type power supply device, so as to ensure that a current flowing into the part of the plurality of cells is equal to a current flowing into a remaining of the plurality of cells.

3. The charging control apparatus of claim 2 , wherein,
the charging control apparatus is further configured to acquire at least one of current electric quantities or current voltages of the plurality of cells; and
the control circuit is further configured to adjust the magnitude of the equalizing current in the equalizing circuit according to one or more difference values among the at least one of the current electric quantities or the current voltages of the plurality of cells.

4. The charging control apparatus of claim 1 , wherein the control circuit is further configured to turn on the first charging channel and turn off the equalizing circuit when it is detected that the first-type power supply device is coupled to the charging control apparatus.

5. The charging control apparatus of claim 1 , further comprising:
a communication circuit, configured to communicate with the power supply device, so that the charging signal provided by the first-type power supply device or the second-type power supply device is matched with a current charging stage of the cells.

6. The charging control apparatus of claim 1 , wherein the equalizing circuit is a Cuk circuit, the charging control apparatus further comprises a control circuit,
configured to, during an operating process of the second charging channel, transmit a driving signal to the Cuk circuit to drive the Cuk circuit, so that the plurality of cells transfer energy through the Cuk circuit, so as to equalize the voltages of the plurality of cells.

7. The charging control apparatus of claim 6 , wherein the charging control apparatus is further configured to acquire at least one of current electric quantities or current voltages of the plurality of cells; and
the control circuit is configured to:
when one or more difference values among the at least one of the current electric quantities or the current voltages of the plurality of cells are greater than a preset threshold, transmit the driving signal to the Cuk circuit to drive the Cuk circuit.

8. The charging control apparatus of claim 7 , wherein the control circuit is further configured to adjust a duty ratio of the driving signal to adjust a magnitude of a current in the Cuk circuit.

9. The charging control apparatus of claim 8 , further comprising:
a current detection circuit, configured to detect the current in the Cuk circuit; and
the control circuit being configured to adjust the duty ratio of the driving signal to adjust the magnitude of the current in the Cuk circuit, by acts:
determining, by the control circuit, a target value of the current in the Cuk circuit according to the one or more difference values among the at least one of the current electric quantities or the current voltages of the plurality of cells; and
adjusting, by the control circuit, the duty ratio of the driving signal so that the current of the Cuk circuit, detected by the current detection circuit, reaches the target value.

10. The charging control apparatus of claim 1 , wherein the equalizing circuit is an equalizing circuit based on an RLC series circuit or an equalizing circuit based on Buck-Boost.

11. The charging control apparatus of claim 1 , wherein the plurality of cells comprises two cells, and the part of the plurality of cells comprises one of the two cells.

12. A device to be charged, comprising:
a battery, comprising a plurality of cells coupled with each other in series; and
a charging control apparatus, comprising:
a first charging channel, configured to charge a plurality of cells coupled in series according to a charging signal provided by a first-type power supply device:
second charging channel, configured to charge a part of the plurality of cells according to a charging signal provided by a second-type power supply device:
an equalizing circuit, configured to equalize voltages of the plurality of cells; and
a control circuit, configured to turn on the second charging channel and the equalizing circuit when it is detected that the second-type power supply device is coupled to the charging control apparatus.

13. A method of charging control for a charging control apparatus,
the charging control apparatus comprising: a first charging channel, configured to charge a plurality of cells coupled in series according to a charging signal provided by a first-type power supply device; a second charging channel, configured to charge a part of the plurality of cells according to a charging signal provided by a second-type power supply device; an equalizing circuit, configured to equalize voltages of the plurality of cells; and a control circuit, configured to turn on the second charging channel and the equalizing circuit when it is detected that the second-type power supply device is coupled to the charging control appartus,
the method comprising:
turning on the second charging channel and the equalizing circuit when it is detected that the second-type power supply device is coupled to the charging control apparatus.

14. The method of claim 13 , comprising:
determining a magnitude of an equalizing current in the equalizing circuit according to a magnitude of a charging current provided by the second-type power supply device, so as to ensure that a current flowing into the part of the plurality of cells is equal to a current flowing into a remaining of the plurality of cells.

15. The method of claim 14 , comprising:
acquiring at least one of current electric quantities or current voltages of the plurality of cells; and
adjusting the magnitude of the equalizing current in the equalizing circuit according to one or more difference values among the at least one of the current electric quantities or the current voltages of the plurality of cells.

16. The method of claim 13 , further comprising:
turning on the first charging channel and turning off the equalizing circuit when it is detected that the first-type power supply device is coupled to the charging control apparatus.

17. The method of claim 13 , further comprising:
communicating with the power supply device, so that the charging signal provided by the power supply device is matched with a current charging stage of the cells.

18. The method of claim 13 , wherein the equalizing circuit is a Cuk circuit, and the method comprises:
transmitting a driving signal to the Cuk circuit to drive the Cuk circuit, so that the plurality of cells transfer energy through the Cuk circuit, so as to equalize the voltages o

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Chen Shebiao
• Tian Chen

Classifications

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/56 Primary

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H02J7/52

  for charge balancing, e.g. equalisation of charge between batteries · CPC title

• H02J7/44

  between battery management systems and power sources · CPC title

• H02J7/0019 Primary

  Electricity · mapped topic