Mobile terminal and rapid charging method

• US 10,110,038 B2
• Filed: 03/07/2016
• Issued: 10/23/2018
• Est. Priority Date: 08/05/2015
• Status: Active Grant

• Current Assignee: Hisense International Company Limited (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.), Hisense USA Corporation (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.)
• Original Assignee: Hisense International Company Limited (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.), Hisense Mobile Communications Technology Co., Ltd. (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.), Hisense USA Corporation (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.)
• Inventors: Li, Chunqian, Huang, Yaling, Zhao, Yufeng, Zhang, Naifeng, Du, Wenjuan
• Primary Examiner(s): Nguyen, Nha
• Application Number:
  US15/062,658
• Publication Number:
  US 20170040822A1
• Time in Patent Office: 960 Days
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries

Abstract

The disclosure discloses a mobile terminal and a rapid charging method, where the mobile terminal includes a microprocessor configured to detect voltage of a battery core thereof upon detecting that the USB interface is connected with the DC-charging power source adaptor, if the voltage of the battery core is in a range [S1, S2] delimited by preset DC-charging thresholds, to calculate a target charging voltage value V_out from the voltage of the battery core, the maximum terminal voltage supported by the battery as well as at least one of a resistance value on a charging line, a resistance value on a circuit board of the mobile terminal, an inner resistance of the battery, and to send the target charging voltage value V_out to the DC-charging power source adaptor to control the DC-charging power source adaptor to output charging voltage to DC-charge the battery.

Claims

1. A mobile terminal, comprising:

a battery configured to store electric energy, the battery including a battery core;

a USB interface configured to connect with a DC-charging power source adaptor;

a microprocessor configured to detect a voltage of the battery core upon detecting that the USB interface is connected with the DC-charging power source adaptor, and if the voltage of the battery core is in a range [S1, S2] delimited by preset DC-charging thresholds, calculate a target charging voltage value V_out based on the voltage of the battery core, a maximum terminal voltage supported by the battery, a resistance value on a charging line, a resistance value on a circuit board of the mobile terminal, and an inner resistance of the battery, and send the target charging voltage value V_out to the DC-charging power source adaptor to control the DC-charging power source adaptor to output a charging voltage to charge the battery, wherein the charging voltage is a target charging voltage determined by the DC-charging power source adaptor from the target charging voltage value V_out; and

a power source managing chip connected between the USB interface and the battery, the microprocessor configured to control the power source to charge the battery in a preset charging mode upon detecting that the voltage of the battery core is out of the range [S1, S2] delimited by the preset DC-charging thresholds.

2. The mobile terminal of claim 1, further comprising a DC switch connected between the USB interface and the battery, the microprocessor configured to control the DC switch to transmit the charging voltage output by the DC-charging power source adaptor directly to the battery to charge the battery upon detecting that the voltage of the battery core is in the range [S1, S2] delimited by the preset DC-charging thresholds.

3. The mobile terminal of claim 1, wherein the microprocessor is configured to, upon detecting that the voltage of the battery core is less than S1, communicate with the DC-charging power source adaptor to instruct the DC-charging power source adaptor to output a constant charging voltage, and start the power source managing chip to pre-charge the battery at a small current;

and wherein the microprocessor is configured to, upon detecting that the voltage of the battery core is more than S2, instruct the DC-charging power source adaptor to output a constant charging voltage, and start the power source managing chip to charge the battery at the constant charging voltage.

4. A rapid charging method, comprising:

detecting, by a mobile terminal, a voltage of a battery core in a battery of the mobile terminal;

if the voltage of the battery core is out of a range [S1, S2] delimited by preset DC-charging thresholds, charging the battery in a preset charging mode;

if the voltage of the battery core is in the range [S1, S2] delimited by the preset DC-charging thresholds, calculating a target charging voltage value V_out based on the voltage of the battery core, a maximum terminal voltage supported by the battery, a resistance value on a charging line, a resistance value on a circuit board of the mobile terminal, and an inner resistance of the battery, and sending the target charging voltage value V_out to a DC-charging power source adaptor; and

transmitting, by the mobile terminal, a charging voltage output by the DC-charging power source adaptor to the battery to charge the battery, wherein the charging voltage is a target charging voltage determined by the DC-charging power source adaptor from the target charging voltage value V_out.

5. The rapid charging method of claim 4, wherein:

the target charging voltage value V_out is determined based on a target charging current value I_targ;

the target charging current value I_tug is determined based on a charging current maximum value I_max; and

the charging current maximum value I_max is determined based on the maximum terminal voltage supported by the battery and the inner resistance of the battery.

6. The rapid charging method of claim 5, further comprising:

detecting, by the mobile terminal, a real charging current I_chg received by the mobile terminal; and

if the real charging current I_chg is less than the target charging current value I_targ, adjusting up the target charging voltage value V_out by a preset value.

7. The rapid charging method of claim 5, further comprising:

detecting, by the mobile terminal, a real charging current I_chg received by the mobile terminal; and

if the absolute value of the difference between the real charging current I_chg and the target charging current value I_targ is more than a preset value representing a controllable range of the difference between the real charging current value and the target charging current value, stopping the battery from being charged.

8. The rapid charging method of claim 5, further comprising:

detecting, by the mobile terminal, a real charging current I_chg received by the mobile terminal; and

if the real charging current I_chg is larger than the charging current maximum value I_max, stopping the battery from being charged.

9. The rapid charging method of claim 5, wherein V_out, I_targ and I_max are calculated in the equations of:

V_out=V_{bat_real}+I_targ*(R_line+R_board+R_bat);

I_targ=I_max−

Δ

I; and

I_max=min((V_{bat_max}−

V_{bat_real})/R_bat,I_allow),

wherein V_{bat_real} represents the voltage of the battery core, R_line represents the resistance value on the charging line, R_board represents the resistance value on the circuit board of the mobile terminal, R_bat represents the inner resistance value of the battery, V_{bat_max} represents the maximum terminal voltage value supported by the battery, I_allow represents the maximum safe charging current value selected while ensuring the safety of the battery being charged, and Δ

I represents a preset difference in current.

10. The rapid charging method of claim 4, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.

11. The rapid charging method of claim 5, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.

12. The rapid charging method of claim 6, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.

13. The rapid charging method of claim 7, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.

14. The rapid charging method of claim 8, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.

15. The rapid charging method of claim 9, wherein charging the battery in a preset charging mode includes:

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is less than S1, the DC-charging power source adaptor to output a constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to pre-charge the battery at a small current; and

instructing, by the mobile terminal, upon detecting that the voltage of the battery core is more than S2, the DC-charging power source adaptor to output the constant charging voltage, transmit the constant charging voltage to a power source managing chip, and start the power source managing chip to charge the battery at the constant charging voltage.