MOBILE TERMINAL AND RAPID CHARGING METHOD

• US 20170040822A1
• Filed: 03/07/2016
• Published: 02/09/2017
• 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 Mobile Communications Technology Co., Ltd. (Qingdao Huatong State-Owned Capital Operation (Group) Co., Ltd.)
• Inventors: LI, Chunqian, HUANG, Yaling, ZHAO, Yufeng, ZHANG, Naifeng, DU, Wenjuan
• Granted Patent: US 10,110,038 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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;

a USB interface configured to be connected with a DC-charging power source adaptor; and

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, and 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, and 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, and 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, wherein the charging voltage is a target charging voltage determined by the DC-charging power source adaptor from the received target charging voltage value V_out.

2. The mobile terminal of claim 1, further comprises:

a DC switch, connected between the USB interface and the battery, configured to be controlled by the microprocessor upon detecting that the voltage of the battery core is in the range [S1, S2] delimited by the preset DC-charging thresholds, to be closed to transmit the charging voltage output by the DC-charging power source adaptor directly to the battery to DC-charge the battery; and

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

3. The mobile terminal of claim 2, wherein the microprocessor is configured, upon detecting that the voltage of the battery core is less than S1, to communicate with the DC-charging power source adaptor to instruct the DC-charging power source adaptor to output constant charging voltage, and to start the power source managing chip to pre-charge the battery at small current;

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

4. A rapid charging method, comprising:

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

if the voltage of the battery core is in a range [S1, S2] delimited by preset DC-charging thresholds, then calculating a target charging voltage value V_out from the voltage of the battery core, and 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, 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, received charging voltage output by the DC-charging power source adaptor to the battery to DC-charge the battery, wherein the charging voltage is a target charging voltage determined by the DC-charging power source adaptor from the received target charging voltage value V_out.

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

the target charging voltage value V_out is determined from a target charging current value I_targ, the resistance value on the charging line, the resistance value on the circuit board of the mobile terminal, and the inner resistance of the battery;

the target charging current value I_targ is determined from a charging current maximum value I_max; and

the charging current maximum value I_max is determined from 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, then adjusting up the target charging voltage value V_out by a preset value Δ

V.

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 Ie representing a controllable range of the difference between the real charging current value and the target charging current value, then stopping the battery from being charged.

8. The rapid charging method of claim 5, wherein

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, then 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, further comprising:

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

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

11. The rapid charging method of claim 4, further comprising:

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

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

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

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

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

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

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

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

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

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

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

15. The rapid charging method of claim 9, further comprising:

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

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