CN104092274A - Intelligent charger with output voltage changing function - Google Patents

Abstract

The invention discloses an intelligent charger with an output voltage changing function. The intelligent charger comprises a processing unit, a power unit and an interface unit. The processing unit is connected with the power unit and the interface unit. The power unit is connected with the interface unit. The interface unit is connected with an external intelligent terminal. The processing unit conducts handshake and communication with the intelligent terminal through the interface unit and controls the output voltage of the power unit according to handshake and communication results so that the output voltage of the power unit can reach the requirements of the intelligent terminal. The intelligent charger can intelligently switch the output voltages according to the requirements of the intelligent terminal to charge the intelligent terminal and accelerate charging. The invention further discloses a charging method applied to the intelligent charger.

Description

- kind of intelligence can transform the output voltage of the charger

FIELD

[0001] The present invention relates to the field of communications, particularly to a smart charger switchable output voltage and a charging method.

Background technique

[0002] Since more intelligent terminal screen, more applications, such that increasing the power consumption of intelligent terminals, intelligent terminal corresponding battery capacity is also rising, so that the charging time is longer, a long charging time of the user increasingly dissatisfied.

SUMMARY

[0003] The present invention to solve the technical problem of the intelligent terminal charging time is longer, there is a need for a smart may charge faster conversion output voltage charger and a charging method.

[0004] To solve the above problems, the present invention provides an intelligent charger may be converted output voltage, comprising a processing unit, a power supply unit and the interface unit, the processing unit connected to the power supply unit and the interface unit, the power supply means connected to said interface unit, the interface unit is connected to the external smart terminal, said handshaking processing unit and the communication through the interface unit and the intelligent terminal, to control the output voltage of the power supply unit according to a result of the handshaking and communications, the output voltage of the power supply unit meet the requirements of an intelligent terminal.

[0005] Further, the processing unit is a central processor or microprocessor, the output voltage of the power supply unit is a controllable power unit, the interface unit is a USB interface.

[0006] Further, when the processing unit does not issue the instruction to power supply unit, the default output voltage of the power supply unit is + 5V, when the processing unit issues an instruction to the power supply unit when the output voltage of the power supply unit according to an instruction corresponding to the processing unit.

[0007] Further, the power supply unit comprises a switch to switch the voltage value output by the switch.

[0008] Further, the switch is a single pole multi-throw switch, the switching power supply unit in the processing unit controls the single-pole multi-throw switch, connected to the processing unit and the intelligent terminal of the charger handshaking, and as required to control the smart terminal single-pole multi-throw switch.

[0009] Further, the power supply unit comprises a DC / DC converter circuit, the output voltage V pull-up resistor and pull-down resistor, the power supply unit is connected to the + VBUS terminal interface unit, and passes through the pull up and pull down resistor resistor to ground, the pull-up and pull-down node between the resistor as the feedback resistor terminal electrically connected to the DC / DC converter circuit, the pull-down resistor is an adjustable resistor connected to the processing unit may control the pull-down resistor the resistance value of the pull-down resistor VR size, when changing the resistance value of the sampled voltage pull-down resistor, the reference voltage feedback also followed changes, the DC output voltage V + also with the change, the processing unit controls the output voltage of the power supply unit value continuous conversion of the output voltage.

[0010] Further, the smart charger may include converting the output voltage of the power supply unit and the interface processing unit, a power unit, an interface unit, a conversion unit, a voltage difference amplifier and a current sampling resistor, said current sampling resistor provided between the unit size for sampling the output current, the output current of the digital conversion unit converting the sampled is sent to the processing unit for processing the digital signal, the processing unit comprises a central processor, said central processor according to the received digital signal and determines the size of the power supply unit controls the current output, or the output of the processing unit may turn off the power output according to the received output current corresponding to a digital signal controlling the power supply unit.

[0011] The present invention also provides a method for charging intelligent convertible output voltage, comprising the step S01, and a smart charger connected to the intelligent terminal; step S02, the smart charger initial output voltage is + 5V, the intelligent terminal detects smart charger ; step S03, the intelligent terminal by itself arranged via the USB instruct the charger, the charger output so that suitable quick charge voltage; step S04, the command is received and whether the charger answer, "yes" then jumps to step S05, "NO "jumps to step S07; step S05, intelligent terminal response received charger, the charger is ready to inform; step S06, charger according to the requirements of the intelligent terminal and the output charging voltage fast charging begins; step S07, intelligent terminal confiscated response to the charger, the charging continues in a conventional + 5V.

[0012] Advantageous effects of the present invention are: 1, a method of increasing the output voltage to increase the output power of the charger, to meet the end of rapid charging power demand; 2, handshaking communication with the charger, and the intelligent terminal can and communication handshake; 3, this patent handshake communication through the USB charger charging port and the intelligent terminal, and the output of the intelligent terminal can request a different charge voltage; 4, variable output voltage of the charger primarily by two methods achieved: one for single-pole multi-throw switch by switching to more intelligent charger output voltage; second voltage conversion parameters to vary to achieve charger smart charger continuously varying output voltage; 5, this patent charger by detecting the output current magnitude to protect themselves and the load terminal, to ensure the safe operation of the system. The present invention is a battery charger having a communication handshake to increase output power by raising the output voltage, to meet the intelligent terminal and the rapid charging power supply requirements.

BRIEF DESCRIPTION

[0013] FIG. 1 is a schematic view of a connection with the embodiment of the present invention, the intelligent terminal may be an intelligent converting the output voltage of the charger;

[0014] FIG. 2 is a schematic diagram shown in Figure 1 may be converted smart charger output voltage;

[0015] FIG. 3 is a schematic diagram shown in Figure 1 may be converted output voltage of the smart charger power supply unit;

[0016] FIG. 4 is a schematic diagram of another embodiment shown in FIG. 1 embodiment may transform the output voltage of the smart charger;

[0017] FIG. 5 is a block configuration of another embodiment of the present invention may be an intelligent conversion output voltage of the charger is not intended;

[0018] FIG. 6 is a schematic flow diagram of a smart charging method of the present invention can be converted output voltage.

Detailed ways

[0019] In order to shorten the charging time, the need for fast charging, fast charging to the charging power must be increased to improve the charging power must have a high power charger, the charger is a traditional high-power output voltage constant premise to increase the output current, the output current to increase the maximum current is limited to a charging port, charging connections allowed by other devices, and therefore a method to increase the output current to increase the output power of the charger is greatly limited, this patent proposed a method of increasing the output voltage to increase the output power of the charger, and the charger and can handshake communication intelligent terminal, the output voltage is adjusted in accordance with instructions issued by the smart terminal, to best meet the needs of rapid charging intelligent terminal. Accordingly, the present invention provides a smart charging time can be shortened conversion output voltage charger and a charging method.

[0020] In the method of the present invention is to guarantee the power supply current in a range of common interface devices, charging devices such as power connections allowed only mention 1¾ charger output voltage to provide the output power 1¾ charger.

[0021] The charger output power formula: P = UXI

[0022] wherein P is the output power of the charger, U is the output voltage, I is the output current.

[0023] As can be seen from the above equation, in the case of the charger output current I is constant, the output voltage U with the output power P increases in proportion to the increase. The present invention thus increasing the output voltage while maintaining a stable output current, thus speeding up the charge.

[0024] The following description of the invention in conjunction with the accompanying drawings, technical solutions in the embodiments of the present invention will be clearly and completely described, obviously, the described embodiments are part of the embodiments of the present invention rather than all embodiments. Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention. For ease of description, the below-mentioned "charger" or "intelligent charger" refer to generation of the present invention may be smart conversion output voltage of the charger.

[0025] Please refer to FIG. 1, is a schematic view of a connection with the embodiment of the present invention, the intelligent terminal may be transformed intelligent charger output voltage. The output voltage of the switchable smart charger 1 is connected to one end of the external AC power, the other end is connected to the intelligent terminal 2 to be charged. As shown, wherein a charging positive supply VBUS, the smart charger, or an intelligent terminal to a positive power supply; and a positive power supply VBUS power supply circuit to form the charger for charging and supplying power to the intelligent terminal; D + / D- is used to transmit data communication between the charger and the intelligent terminal; ID to detect.

[0026] Referring also to 2, as shown in FIG 1 may converted output voltage charger 1 includes a processing unit 10, the power supply unit 20 and the interface unit 30. The processing unit 10 is a central processing unit (CPU) or a microprocessor (the MCU), the output voltage of the power supply unit 20 is controllable power unit, the interface unit 30 is a USB interface. The processing unit 10 is connected to the power supply unit 20 and the interface unit 30. The power supply unit 20 is connected to the interface unit 30. The interface unit 30 connected to the external smart terminals. The processing unit 10 through the interface unit, and a USB interface 30 handshake intelligent terminal and communication, to control the output voltage of the power supply unit 20 according to the result of handshaking and communications, the output voltage of the power supply unit 20 reaches the intelligent terminal requirements, so as to achieve the purpose of rapid charging high voltage.

[0027] The output voltage of the power supply unit 20 is controlled by the processing unit 10, the processing unit 10 to adjust the output voltage of the power supply unit 10 according to the requirements of the intelligent terminal. When the processing unit 10 does not issue an instruction to the power supply unit 20, the default output voltage of the power supply unit 20 is + 5V, and the normal charger is compatible with the market. When the processing unit 10 issues an instruction to the power supply unit 20, the power supply unit 20 outputs a voltage according to an instruction corresponding to the processing unit 10, thereby accelerating the charging of the intelligent terminal by the intelligent conversion output voltage.

[0028] The communication interface unit 30 may transform the output voltage of the smart charger contact and the intelligent terminal. In the above-described embodiment of the invention, the interface unit 30 using USB interface mode, for powering and charging interfaces through intelligent terminal VBUS and ground. The VBUS of the USB and USB interface interfaces generally vary, VBUS of the USB interface of the default voltage is + 5V, when the charging voltage rises quickly to meet the needs of rapid charging.

[0029] Also, the AC input connector of the present invention may be employed to meet the world's commercial AC voltage and frequency, wide AC input voltage interfaces.

[0030] Please refer to FIG. 3, a schematic diagram of the power supply unit is a configuration diagram of the switchable output voltage of the smart charger. The power supply unit 20 comprises a switch K, to switch the output voltage values, such as + 5V, VI, V2 and so on through the switch K. In the present embodiment, the switch is a single pole multi-throw switch K. In operation, the power switching unit 20 in the processing unit 10 controls the single-pole multi-throw switch K, to achieve + 5V, V1, V2, such as different output voltages. The intelligent terminal processing unit 20 of the charger 2 and the connection handshaking is required to control the single-pole multi-throw switch, so that the output voltage of the charger 2 satisfies the requirements of the intelligent terminal intelligent terminal 2 of the press. Ultimately achieve rapid charging power requirements for high voltage. In the above-described embodiments, V2> VI> + 5V, the charger output different levels of voltage VI or V2 smart terminal according to claim 2, whereby fast charging.

[0031] Please refer to FIG. 4 is a schematic diagram of another embodiment of the embodiment of FIG. 1 may be converted output voltage of the smart charger.

[0032] In the present embodiment, the power supply unit 20 includes a DC / DC conversion circuit, pull-up resistor R and a pull-down resistor VR. Output voltage of the power supply unit V 20 is connected to the + terminal VBUS of the interface unit 30, and passes through the pull-down resistor VR and the resistor R is grounded. A node between the resistor R and the pull-down resistor VR is connected to the DC / DC converter circuit as a feedback terminal electrically. The pull-down resistor is a variable resistor VR, the processing unit 10 is connected to the pull-down resistor VR may control the size of the pull-down resistance value resistor VR.

[0033] The power supply unit 20 adjusts the output voltage by adjusting the resistance value of the voltage conversion circuit and the feedback to meet the end-use method for improving the output voltage of the charger is rapid charging power requirements. Further, the reference voltage feedback point A is:

[0034] VA = [V + / (R + VR)] * VR

[0035] wherein, VA denotes the voltage value at A, the reference voltage value is fed back. The DC / DC conversion circuit samples the feedback reference voltage of the feedback terminal A,

[0036] When the converted voltage sampled resistance value of the pull-down resistor VR, according to the above formula to obtain a feedback reference voltage VA also with the change, the feedback reference voltage changes, the DC output voltage V + also with the change, so that 10 is controlled by the processing unit the output voltage value of the power conversion unit 20 to achieve a continuous output voltage.

[0037] The above-described embodiment, the present invention can transform an intelligent charger output voltage can achieve the purpose of regulating the output voltage, and ultimately improved method charger output voltage to increase the output power, the terminal to meet the large fast charging power demand.

[0038] Please refer to FIG. 5, is a block diagram of the configuration of another embodiment of the present invention may be an intelligent conversion output voltage of the charger embodiment. Converting the output voltage can be the smart charger 10 includes a processing unit, a power supply unit 20, an interface unit 30, conversion unit 40, the voltage difference amplifier 50 and a current sampling resistor R. The current sampling resistor R 20 is provided between the power supply unit and the interface unit 30, for sampling the output current magnitude. The analog-digital conversion unit 40 (also referred to as a conversion unit ADC) to a post-processing unit 10 for processing the sampled output current is converted to a digital signal. The processing unit 10 includes a central processor, said central processor determines according to the received digital signal and controls the power output unit 10 of the magnitude of the current. In operation, the processing unit 10 according to the received output current corresponding to the digital signal control unit 20 outputs the power supply on or off the power output to ensure the security of the entire charging system (intelligent terminal and charger) is.

[0039] Please refer to FIG. 6 is a schematic flow diagram of a smart charging method of the present invention can be converted output voltage. Smart charging method of the present invention may be converted output voltage comprising:

[0040] Step S01, and a smart charger connected to the intelligent terminal;

[0041] step S02, the initial output voltage detection smart charger smart charger is + 5V, the intelligent terminal;

[0042] In step S03, the intelligent terminal by itself arranged via the USB instruct the charger, the charger output so that an appropriate voltage fast charge;

[0043] step S04, the command is received and whether the charger answer, "Yes" then jumps to step S05, "NO" then jumps to step S07;

[0044] Step S05, intelligent terminal response received charger, charger notice when you are ready;

[0045] Step S06, the charger output required and the intelligent terminal starts charging voltage fast charge;

[0046] Step S07, the smart charger terminal did not receive a response, then continue in a conventional + 5V charge.

[0047] Compared to the prior art, the beneficial effects of the present invention:

[0048] 1, a method of increasing the output voltage to increase the output power of the charger, to meet the end of rapid charging power demand.

[0049] 2, the charger has a handshake communication function, can shake hands and communication and intelligent terminal.

[0050] 3, this patent handshake communication through the USB charger charging port and the intelligent terminal, and the output of the intelligent terminal can request a different charge voltage.

[0051] 4, the variable output voltage of the charger is achieved primarily by two methods: one is switched by a single-pole multi-throw switch to more intelligent charger output voltage; second voltage converter to change a charger parameters to achieve intelligent charger output voltage changes continuously.

[0052] 5, this patent charger by detecting magnitude of output current to protect itself and the load terminal, to ensure the safe operation of the system.

[0053] The present invention is a battery charger having a communication handshake to increase output power by raising the output voltage, to meet the intelligent terminal and the rapid charging power supply requirements.

[0054] The embodiments described above are only embodiments of the present invention, not intended to limit the scope of the present invention, all utilize the present specification and drawings taken equivalent structures or equivalent process, or other direct or indirect application Related technical fields shall fall within the scope of protection of the present invention.

Claims (8)

1. An intelligent charger may be converted output voltage, wherein the processing unit comprises a power supply unit and the interface unit, the processing unit connected to the power supply unit and the interface unit, the power supply unit connected to the interface unit, output voltage of the external interface unit connected to the intelligent terminal, said handshaking processing unit and the communication through the interface unit and the intelligent terminal to control the power supply unit according to a result of communication handshaking and output voltage, said power supply unit reaches a smart terminal requirements.

The smart charger output voltage can be converted according to claim 1, wherein the processing unit is a central processor or microprocessor, the output voltage of the power supply unit is a controllable power unit, said interface unit is a USB interface.

The intelligence of the output voltage of a switchable charger as claimed in claim wherein, when the processing unit does not issue the instruction to power supply unit, the default output voltage of the power supply unit is + 5V, when the processing unit issues an instruction to the power supply unit when the power supply unit outputs a voltage according to an instruction corresponding to the processing unit.

The intelligent 3 may be converted to the output voltage of the charger as claimed in claim, wherein said power supply unit includes a switch to switch the voltage value output by the switch.

5. The smart 4 may be converted output voltage charger as claimed in claim, wherein the switch is a single pole multi-throw switch, the switching power supply unit in the processing unit controls the single-pole multi-throw switch, the intelligent terminal processing unit and the charger is connected to a communication handshake, according to the requirements of the intelligent terminal to control the single-pole multi-throw switch.

6. The smart claim 5 convertible charger output voltage, wherein said power supply unit comprises a DC / DC converter circuit, the output voltage V pull-up resistor and pull-down resistor, the power supply unit is connected to the + VBUS terminal interface unit, and in turn is electrically connected to a feedback terminal of the DC / DC converter circuit, the pull-down resistor via said node between resistor and the pull-down resistor to ground, the pull-up resistor and pull-down resistors are adjustable resistor, the processing unit is connected to the pull-down resistor and the pull-down resistor to control the value of the size of resistor VR, when the resistance value of the pull-down converted voltage sampling resistor, the reference voltage feedback also followed changes, also the DC output voltage V + followed changes, the processing unit controls the continuous conversion output of the power supply unit to achieve an output voltage value of the output voltage.

The smart charger output voltage can be converted according to claim 1, wherein said switchable output voltage intelligent charger includes a processing unit, a power unit, an interface unit, a conversion unit, a voltage difference amplifier and a current sampling resistor, said current sampling resistor is provided between the power supply unit and the interface unit, for sampling the output current magnitude, the output current of the digital conversion unit converting the sampled is sent to a digital signal processing unit processing, the processing unit comprises a central processor, said central processor determines and controls the magnitude of the current outputted from the power supply unit, the process according to the received digital signal corresponding to the digital unit may output current received a signal output unit controls the power off or power output.

8. - intelligences convertible output voltage charging method, characterized by comprising: a step S01, and a smart charger connected to the intelligent terminal; step S02, the smart charger initial output voltage is + 5V, the intelligent terminal detects smart charger ; step S03, the intelligent terminal by itself arranged via the USB instruct the charger, the charger output so that suitable quick charge voltage; step S04, the command is received and whether the charger answer, "yes" then jumps to step S05, "NO "jumps to step S07; step S05, intelligent terminal response received charger, the charger is ready to inform; step S06, charger according to the requirements of the intelligent terminal and the output charging voltage fast charging begins; step S07, intelligent terminal confiscated response to the charger, the charging continues in a conventional + 5V.