WO2014187415A1

WO2014187415A1 - Charging cable and charging system

Info

Publication number: WO2014187415A1
Application number: PCT/CN2014/079641
Authority: WO
Inventors: 李现华; 达民权
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-12-27
Filing date: 2014-06-10
Publication date: 2014-11-27
Also published as: CN203722283U

Abstract

A charging cable and charging system, wherein the charging cable includes: a charging chip, a charger determination module and a configuration resistor, wherein the charging chip and the charger determination module are connected, the charger determination module is used for determining an input voltage magnitude, the charging chip outputs current on the basis of determination results of the charger determination module, one end of the configuration resistor is connected to the charging chip, the other end is grounded, and the configuration resistor is used to configure a charging current.

Description

Charging cable and charging system

The invention discloses a charging cable and a charging system, in particular to a charging cable and a charging system applied to terminal charging. Background technique

At present, smart phones have become one of the indispensable items for consumers' life work. With the rapid development of smart phones, the screens are getting bigger and bigger, and the scope of application is more and more extensive. Coupled with the approaching of the 4G era, energy consumption is coming. The bigger. In order to meet the battery life, the battery capacity must be bigger and bigger, and the problem that arises is the charging efficiency problem. When charging every day, if the charging time is too long, it will waste the time of the consumer and affect the work and life of the consumer. . Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a charging cable and a charging system.

An embodiment of the present invention provides a charging cable, including a charging chip, a charger judging module, and a configuration resistor, wherein the charging chip is connected to a charger judging module, and the charger judging module is configured to determine an input voltage magnitude, The charging chip performs current output according to the determination result of the charger judging module. One end of the configuration resistor is connected to the charging chip, and the other end is grounded. The configuration resistor is used to configure the charging current.

The charging cable further includes a power inductor, and the power inductor is connected to the output end of the charging chip.

The charging chip receives an input voltage threshold ranging from 5V to 16V and an output current threshold of up to 4A.

The two ends of the charging cable are USB interfaces. The embodiment of the present invention further provides a charging system, including a charging cable and a terminal matching the charging cable, the charging cable, including a charging chip, a charger judging module, and a configuration resistor, wherein the charging chip and the charger The determining module is connected, the charger determining module is configured to determine the input voltage, and the charging chip performs current output according to the determination result of the charger determining module, wherein the configuration resistor is connected to the charging chip at one end and grounded at the other end. The configuration resistor is configured to configure a charging current;

The terminal includes a P-channel MOSFET controlled by a baseband processing chip.

The terminal also includes a fuel gauge.

The interfaces at both ends of the charging cable are USB interfaces.

The charging system further includes a power adapter, and the power adapter interface is a USB interface. The charging system also includes a computer having a USB interface.

Compared with the prior art, the embodiment of the present invention has at least the following advantages: It can solve the problem of fast charging of a large-capacity smart phone and improve charging efficiency. The charging circuit in the existing mobile phone is transplanted into the charging cable provided by the embodiment of the present invention. On the one hand, the area of the smart phone main board can be saved, and on the other hand, the heat consumption generated by the charging circuit can be reduced, and the system stability can be improved. DRAWINGS

1 is a schematic diagram of a charging cable according to an embodiment of the present invention;

2 is a schematic diagram of a charging system according to an embodiment of the present invention;

Figure 3 is a schematic illustration of a prior charging system. detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. 1 is an embodiment of a charging cable provided by the present invention. As shown in Figure 1, the charge The electric cable includes a charging chip, a charger judging module, that is, a CHARGER judging chip in FIG. 1, and a configuration resistor, wherein the charging chip is connected to the charger judging module, and the charger judging module is configured to determine the input voltage level. The charging chip performs current output according to the determination result of the charger determining module. The one end of the configuration resistor is connected to the charging chip, and the other end is grounded. The configuration resistor is set to configure the charging current.

The charging cable further includes a power inductor, the power inductor is connected to the output end of the charging chip, the charging chip receives an input voltage threshold range of 5V-16V, and the output current threshold is up to 4A, the charging cable The interfaces on both ends are USB interfaces.

Figure 1 is a USB cable charging cable. The charging circuit module is built into the cable near the mobile phone. The charging circuit module is connected in series on the VBUS signal. The charging chip can be adapted to the 5V-16V input level. The maximum output can reach 4A. The external power inductor is an ultra-low DC impedance power inductor, which reduces energy loss, and an external charging current configuration resistor for configuring a fixed maximum charging current. The USB and CHARGER (charger) judgment chip is used to identify the charging device. The PC is also a charger to adjust the charging current at both charging interfaces.

2 is an embodiment of a charging system provided by the present invention. As shown in Figure 2, the module is an AC/DC power adapter that increases the output voltage of the traditional smartphone charger from 5V to 16V, increases the output current to 4A, USB interface, D+, D- internal short.

Module 2 is a charging cable with USB interface. The charging circuit module is built in the cable near the mobile phone. The charging circuit module is connected in series on the VBUS signal. The charging chip can be adapted to the input level of 5V-16V, and the maximum output can reach 4A. The external power inductor is super ^ DC impedance power inductor, reducing energy loss, external charging current configuration resistor, used to configure a fixed maximum charging current, USB and CHARGER judgment chip is used to identify the charging device as a PC or a charger , thereby adjusting the charging current at the two charging interfaces.

Module 3 is a charging management module built into the smartphone. The fuel gauge is used to monitor whether the battery is fully charged. When it is full, the charging channel can be turned off by turning off the P-channel mosfet to complete charging. Connect one end of module two to module one, and the other end is connected to the USB interface of smart phone; when the mobile phone is turned off, if module 3 detects that the VBUS voltage of the USB interface of the mobile phone is less than the constant current charging level threshold set by the system, the baseband chip passes control P The -mos is turned on, so that the system works in trickle charge mode until the VBUS level reaches the constant current charge level threshold, and the system is turned on and enters the constant current mode.

Module 2 contains the charger judgment chip. This chip can judge whether the module is a type of device by shorting the D+ and D- signals of the USB. When D+, D- is shorted, the module is a charger, when D+, When D- is not shorted, the module one is a PC. When the module one is a charger, it is connected to the mobile phone through the module 2. The charger in the second module determines that the chip outputs a high level, indicating that the charging chip switches to the high current output mode; when the module one is a PC, connects to the mobile phone through the module 2, the module The second charger determines that the chip outputs a low level, indicating that the charging chip is switched to the normal current output mode. At the same time that the charging device is connected, the baseband processing chip of the mobile phone recognizes that after the charger is inserted through the analog-to-digital conversion (ADC) module, the baseband processing chip opens the P-channel mosfet of the module three, and enters the fast charging mode, and the constant current charging is performed. The current is 4A. When the battery voltage reaches 4.2V, it automatically enters the constant voltage mode to charge, and the charging current is gradually reduced.

The fuel gauge in module 3 can record the charge during the charging process. The battery charge is recorded by the fuel gauge. During the charging process, the fuel gauge of module 3 always monitors the battery charge. When the battery reaches the full state, the fuel gauge will be full. The information is reported to the baseband processing chip through the I2C interface, and the baseband processing chip outputs a control signal to turn off the P-channel mosfet, and the mobile phone interface pops up "charging is completed."

Figure 3 is a schematic illustration of a prior charging system. The charging circuit is placed in the mobile phone. Compared with the prior art, the charging system provided by the embodiment of the present invention transplants the charging path in the existing mobile phone to the charging cable provided by the embodiment of the present invention, and on the one hand, can save intelligence. The area of the mobile phone motherboard, on the other hand, can reduce the heat consumption generated by the charging circuit and improve the stability of the system.

The above description is only one embodiment of the present invention, and is not all or the only embodiment. Those skilled in the art can learn from the technical solution of the present invention by reading the specification of the present invention. Whatever equivalent changes are covered by the claims of the present invention. Industrial applicability

The invention provides a charging cable and a charging system, which can realize fast charging of a large-capacity smart phone and improve charging efficiency. The charging circuit in the existing mobile phone is transplanted into the charging cable provided by the invention, on the one hand, the area of the smart phone main board can be saved, and on the other hand, the heat consumption generated by the charging circuit can be reduced, and the stability of the system can be improved.

Claims

claims

1. A charging cable, including a charging chip, a charger judgment module and a configuration resistor. The charging chip is connected to the charger judgment module. The charger judgment module is used to judge the input voltage. The charging chip is based on The judgment result of the charger judgment module performs current output. One end of the configuration resistor is connected to the charging chip and the other end is connected to ground. The configuration resistor is used to configure the charging current.

2. The charging cable according to claim 1, further comprising a power inductor connected to the output end of the charging chip.

3. The charging cable according to claim 1, wherein the input voltage threshold range received by the charging chip is 5V-16V, and the maximum output current threshold is 4A.

4. The charging cable according to any one of claims 1 to 3, wherein the interfaces at both ends of the charging cable are USB interfaces.

5. A charging system, including a charging cable and a terminal matching the charging cable. The charging cable includes a charging chip, a charger judgment module and a configuration resistor, wherein the charging chip is connected to the charger judgment module, and the The charger judgment module is used to judge the input voltage. The charging chip performs current output according to the judgment result of the charger judgment module. One end of the configuration resistor is connected to the charging chip and the other end is connected to ground. The configuration resistor Used to configure charging current;

The terminals include P-channel MOSFETs controlled by a baseband processing chip.

6. The charging system of claim 5, wherein the terminal further includes a fuel gauge.

7. The charging system according to claim 5, wherein the input voltage threshold range received by the charging chip is 5V-16V, and the maximum output current threshold is 4A.

8. The charging system according to claim 5, wherein the interfaces at both ends of the charging cable are USB interfaces.

9. The charging system according to any one of claims 5 to 8, further comprising a power supply suitable for The power adapter interface is a USB interface.

10. The charging system according to any one of claims 5 to 8, further comprising a computer, and the computer has a USB interface.