CN106300565A - Conversion equipment and the method for realization charging conversion thereof for quick charger - Google Patents
Conversion equipment and the method for realization charging conversion thereof for quick charger Download PDFInfo
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- CN106300565A CN106300565A CN201610949742.8A CN201610949742A CN106300565A CN 106300565 A CN106300565 A CN 106300565A CN 201610949742 A CN201610949742 A CN 201610949742A CN 106300565 A CN106300565 A CN 106300565A
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 27
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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Abstract
The invention discloses a kind of conversion equipment for quick charger, it is characterized in that, including: input, Voltage stabilizing module, identification module, control module and outfan, input is connected with Voltage stabilizing module and identification module respectively, Voltage stabilizing module is connected with identification module and control module respectively, identification module is connected with control module, and control module is connected with outfan；Wherein, Voltage stabilizing module receives supply voltage by input and carries out voltage stabilizing process, and exports the supply voltage after voltage stabilizing processes to identification module and control module；Control module reads the conversion voltage of outfan, generates conversion signal group according to conversion voltage and exports to identification module；Identification module generates handshake according to conversion signal group and identifies voltage signal, and is exported by input.The invention also discloses the implementation method utilizing this conversion equipment that quick charger is charged conversion.Pass through apparatus and method of the present invention, it is possible to make the equipment being not carried out filling soon that quick charger can also be used to be charged, extend the range of application of quick charger.
Description
Technical Field
The invention relates to the technical field of charging, in particular to a conversion device for a quick charger and a method for realizing charging conversion through the conversion device.
Background
High-pass QC2.0/3.0(Quick Charge 2.0/3.0, fast-Charge technology 2.0/3.0) is a topic which is popular in the whole fast-Charge industry at present. Before this, the quick charging can only be achieved by raising the current, but the 5V/2A (i.e. 10W power) that Micro USB (Micro USB) can bear has reached the critical point, and the increase of the current will double the defect rate of Micro USB. At this time, the QC2.0 fast charge converter with high voltage is rapidly touted by consumers without changing the Micro USB interface.
A large number of QC2.0/3.0 fast chargers exist in the market at present, but the devices without the QC2.0/3.0 fast charging technology are more and cannot be compatible, so that the devices without the QC2.0/3.0 fast charging technology cannot be charged by the QC2.0/3.0 fast charging charger.
Some fast charging converters also appear at present, but are limited by technical limitations of the current fast charging converters, and the current fast charging converters select to output multi-level fast charging voltages through keys and two-bit or multi-bit switches, that is, the fast charging converters need to be manually implemented, which is very inconvenient, the performance is not high (for example, higher charging voltage cannot be output), and the keys are easy to damage.
Disclosure of Invention
According to an aspect of the present invention, there is provided a switching device for a fast charger, comprising: the input end is respectively connected with the voltage stabilizing module and the identification module, the voltage stabilizing module is respectively connected with the identification module and the control module, the identification module is connected with the control module, and the control module is connected with the output end; the voltage stabilizing module receives the power supply voltage through the input end to perform voltage stabilizing processing and outputs the power supply voltage after voltage stabilizing processing to the identification module and the control module; the control module reads the conversion voltage at the output end, generates a conversion signal group according to the conversion voltage and outputs the conversion signal group to the identification module; the identification module generates a handshake signal and an identification voltage signal according to the conversion signal group and outputs the handshake signal and the identification voltage signal through the input end.
The conversion device provided by the invention can adjust the conversion voltage through the output end according to the charging voltage requirement, the control module controls according to the conversion voltage so as to generate different handshaking signals and identification voltage signals at the input end through the identification module, the handshaking is established with the quick charger through the handshaking signals, and the output voltage mode of the quick charger is controlled through the identification voltage signals, so that the output of multi-level quick charging voltage is automatically realized according to the requirement, and the equipment without the quick charging function is charged by the quick charger. In addition, the device of the invention also carries out voltage stabilization treatment through the voltage stabilization module so as to provide stable power supply voltage for the identification module and the control module, and provides overcurrent protection for the device through constant voltage, thereby avoiding abnormity caused by current or voltage fluctuation and improving the performance of the conversion device.
In some embodiments, the control module includes a second control chip, and a storage unit and a control unit configured in the second control chip, the control module is connected to the output terminal through a third pin of the second control chip, and is connected to the identification module through a first pin, a fourth pin, and a sixth pin of the second control chip, wherein the storage unit is configured to store reference range data of the converted voltage, and the control unit is configured to read the converted voltage data of the third pin of the second control chip and match the reference range data of the storage unit, generate a converted signal group according to a matching result, and output the converted signal group through the first pin, the fourth pin, and the sixth pin of the second control chip. From this, control module controls the handshake signal and the identification voltage signal that identification module generated through the different conversion signal group of output according to the data value of conversion voltage, realizes communicating with quick charger to reach the effect that the charging voltage of control quick charger output according to external charging equipment's demand, in order to utilize quick charger to charge to the equipment of non-quick charge.
In some embodiments, the output end includes a first resistor, a second resistor and a third resistor, the third resistor is connected in series with the first resistor, the first resistor is connected with the positive electrode of the power supply, the third resistor is connected with the ground wire of the power supply, a monitoring point is arranged between the first resistor and the third resistor, one end of the second resistor is connected with the monitoring point, and the other end of the second resistor is connected with the third pin of the second control chip. Through being equipped with control point, power positive pole and power ground wire jack at the output, can realize according to the difference of the joint that charges of connection and the dynamic adjustment output is at the resistance value of control point to adjust the resistance value according to the charging voltage that the battery charging outfit of connection needs, realize exporting the purpose of different conversion voltage.
In some embodiments, the identification module is a resistor bridge circuit and includes a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor, wherein the sixth resistor and the eighth resistor are connected in series, the sixth resistor is connected to the voltage stabilizing module, and the eighth resistor is connected to the fourth pin of the second control chip; the seventh resistor is connected in series with the ninth resistor, the seventh resistor is connected with the first pin of the second control chip, and the ninth resistor is connected with the sixth pin of the second control chip; a first detection point is arranged between the sixth resistor and the eighth resistor, a second detection point is arranged between the seventh resistor and the ninth resistor, the first detection point is connected to the positive pole of the data line of the input end, and the second detection point is connected to the negative pole of the data line of the input end. From this, control module just can carry out the resistance value through the switching signal group control resistance bridge circuit of output and adjust to at first check point and the different voltage signal of second check point output, so that the voltage value of two data lines of input switches between the voltage value of time sequence agreement, thereby produce signal and the discernment voltage signal of shaking hands through resistance bridge circuit, shake hands and communicate with quick charger, in order to produce the charging voltage who accords with the demand according to the time sequence agreement according to the quick charger of discernment voltage control.
In some embodiments, the voltage regulation module is an LDO regulator circuit, and the LDO regulator circuit includes a first capacitor, a second capacitor, and a first control chip, wherein one end of the first capacitor is connected to the positive power supply terminal of the input terminal and the input pin of the first control chip, respectively, and the other end is connected to the power supply ground; one end of the second capacitor is connected with the reference voltage and the output pin of the first control chip respectively, and the other end of the second capacitor is connected with the power supply ground wire. Therefore, stable power supply voltage can be provided for the identification module and the control module through the LDO voltage stabilizer circuit, and the performance of the converter is guaranteed.
In some embodiments, the device further comprises an adapter, the adapter is divided into a 5V-shift adapter, a 9V-shift adapter, a 12V-shift adapter, a 14.5V-shift adapter, and a 20V-shift adapter, and the adapters are connected to the output terminal and control the value of the converted voltage output by the output terminal. Therefore, the resistance value of the monitoring point of the output end can be adjusted by matching the conversion head containing the resistors with different resistance values to output different conversion voltages, so that the purpose of outputting 5V, 9V, 12V, 14.5V and 20V multi-level charging voltages is achieved, the identification process of the output end is simplified, the identification accuracy is improved, the identification error caused by incompatibility is reduced, the range of the output charging voltage is better controlled, and the universality of the conversion device is improved. In addition, by matching with the adapter connectors of different types, the output charging voltage can reach the maximum value of 20V, so that more equipment such as a notebook computer can be charged by using the quick charger, the quick charger is very intelligent, the application range of the quick charger is greatly improved, and the application value of the quick charging technology is maximized.
According to another aspect of the present invention, there is also provided a method for implementing charge conversion by the above fast charge conversion device, the method including:
the output end outputs corresponding conversion voltage according to the type of the connected charging connector;
the control module reads the conversion voltage data and generates a conversion signal group according to the conversion voltage data;
the identification module generates a handshake signal and an identification voltage signal according to the conversion signal group, and outputs the generated handshake signal and identification voltage signal through an input end.
By the method, the output charging voltage can be converted and controlled through the conversion device, so that the quick charger is used for charging the charging equipment, whether the charging equipment realizes a quick charging protocol or not is judged, the application range of the quick charger is expanded, the problem that the charging equipment is incompatible with the quick charger is solved, and the universality of the quick charger is improved.
In some embodiments, the control module includes a second control chip, and a storage unit and a control unit configured in the second control chip, the control module is connected to the output terminal through a third pin of the second control chip, and is connected to the identification module through a first pin, a fourth pin, and a sixth pin of the second control chip, reading the converted voltage data, and generating the converted signal group according to the converted voltage data includes:
reading the converted voltage data through a third pin of the second control chip;
the control unit compares the read conversion voltage data with reference range data stored in the storage unit in advance, and generates a conversion signal group according to a comparison result and outputs the conversion signal group through a first pin, a fourth pin and a sixth pin of the second control chip.
In some embodiments, the conversion signal group includes a dynamically changing voltage signal and a stable voltage signal, and generating the handshake signal and the identification voltage signal output from the conversion signal group includes:
generating handshake signals according to the dynamically changed voltage signals in the conversion signal group, and loading the handshake signals on the positive electrode end and the negative electrode end of the data line of the input end;
and generating identification voltage signals according to the stable voltage signals in the conversion signal group, and loading the identification voltage signals on the positive electrode end and the negative electrode end of the data line of the input end.
In some embodiments, wherein the types of the connected charging connectors include a 5V-shift conversion connector, a 9V-shift conversion connector, a 12V-shift conversion connector, a 14.5V-shift conversion connector, and a 20V-shift conversion connector, the outputting the corresponding conversion voltages according to the types of the connected charging connectors includes:
when the output end is connected with the 5V gear conversion head, the monitoring point at the output end is connected with the resistance value of 4.32K to the positive pole of the power supply so as to output 3.387V-3.810V conversion voltage to the third pin of the second control chip;
when the output end is connected with the 9V gear conversion head, the resistance value of the monitoring point at the output end to the power supply positive electrode connection 24K is used for outputting the conversion voltage of 1.6V-1.8V to the third pin of the second control chip;
when the output end is connected with the 14.5V gear conversion head, the resistance value of the monitoring point at the output end to the power supply positive electrode connection 240K is used for outputting the conversion voltage of 0.533V-0.6V to the third pin of the second control chip;
when the output end is connected with the 20V gear conversion head, the resistance value of the monitoring point at the output end to the power ground wire is 7.87K, so that the conversion voltage of 0.169V-0.192V is output to the third pin of the second control chip. The device and the method can output multi-level charging voltage, and the charging voltage can reach the highest 20V, so that the notebook computer can be charged by utilizing the quick charger, and the application range is very wide.
Drawings
Fig. 1 is a schematic block diagram of a fast charge conversion device according to an embodiment of the present invention;
fig. 2 is a schematic circuit implementation diagram of a module structure of the fast charge conversion device shown in fig. 1;
FIG. 3 is a circuit schematic of the input and regulator circuit of the embodiment of FIG. 2;
FIG. 4 is a circuit schematic of the control module in the embodiment of FIG. 2;
FIG. 5 is a circuit schematic of the resistive bridge circuit of the embodiment of FIG. 2;
FIG. 6 is a circuit schematic of an output terminal in the embodiment of FIG. 2;
fig. 7 schematically shows a flow chart of a method for implementing charge conversion by the fast charge conversion device shown in fig. 2.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 schematically shows a module structure of a rapid charge conversion apparatus according to an embodiment of the present invention.
As shown in fig. 1, the switching device includes an input terminal 101, a voltage regulator module 20, an identification module 30, a control module 40, and an output terminal 501. The voltage stabilizing module 20 has one end connected to the input end 101 to obtain the input voltage, and the other end connected to the identification module 30 and the control module 40, respectively, and the voltage stabilizing module 20 performs voltage stabilizing processing on the input voltage obtained from the input end 101 and outputs the input voltage to the identification module 30 and the control module 40, so as to provide a stable power supply voltage for the identification module 30 and the control module 40. The control module 40 is connected to the output terminal 501 and the identification module 30, detects the conversion voltage output by the output terminal 501 for judgment, and generates a conversion signal group according to the judgment result to output to the identification module 30. The identification module 30 is connected to the input terminal 101, generates a handshake signal and an identification voltage signal according to the received conversion signal group, and outputs the handshake signal and the identification voltage signal through the input terminal 101. When the conversion device of the embodiment of the invention is used, the input end 101 is connected with the quick charger, and the output end 501 is connected with the charging equipment or the conversion head, so that the quick charger can be used for charging the non-quick charging equipment.
In an embodiment, the regulator module 20 may be any circuit or device for performing a voltage regulation process to provide a regulated voltage source, and an embodiment of the present invention is preferably an LDO regulator circuit. The control module 40 may be any device or circuit capable of reading the converted voltage to generate the converted signal set, and embodiments of the present invention preferably include a programmable control IC having a memory function. The identification module 30 may be any device or circuit capable of receiving the converted signal set of the control module 40 for determination, thereby generating a handshake signal and an identification voltage signal output, and a resistance bridge circuit is preferred in the embodiment of the present invention. The output terminal 501 needs to have an adjustable voltage circuit to output a converted voltage with different amplitudes according to the requirements of the connected external devices (such as a charging device or a converter). Fig. 2 shows an implementation principle of the conversion apparatus shown in fig. 1, by taking the input terminal as a USB a male input terminal, the voltage stabilizing module 20 as an LDO regulator circuit, the control module 40 as a controller, the identification module 30 as a resistor bridge circuit, and the output terminal 501 including a variable resistor monitor point circuit as an example. The conversion means is described in detail below with reference to fig. 2.
As shown in fig. 2, the LDO regulator circuit 201 is connected to the positive power supply at the input end, and performs voltage stabilization on the voltage output from the positive power supply, thereby providing a constant power supply voltage to the resistor bridge circuit 301 and the controller 401. The controller 401 reads the switching voltage from the output terminal 501, performs determination based on the read switching voltage data value, generates a switching signal group based on the determination result, and outputs the switching signal group to the resistance bridge circuit 301. The resistance bridge circuit 301 receives the conversion signal group output by the controller 401, and generates a handshake signal and an identification voltage signal according to the conversion signal group, and the generated handshake signal and identification voltage signal are both loaded at two ends of two differential signals D + (i.e. DP) and D- (i.e. DM) of the input terminal 101, so that the handshake signal and the identification voltage signal can be output to the fast charger through D + and D-of the input terminal. After receiving the signal, the quick charger can handshake with the conversion device according to the handshake signal, and adjust the PWM signal through the identification voltage signal, so that the output voltage (namely the charging voltage) is stabilized at a corresponding amplitude.
In a specific implementation, the generation of the conversion signal group, the handshake signal and the identification voltage signal is implemented according to a timing protocol and a fast charging protocol of a connected fast charger. For example, according to the quick charge protocol of QC2.0/3.0, the output charging voltage range is 5V-20V, and the timing protocol is:
the handshake is established when both D + and D-are 0.6V and hold for about 1.5s, then D-becomes 0V and holds for 50 ms. When D + and D-are kept at the following voltage values after the handshake is established, the charging voltage output by the QC2.0/3.0 quick charger is according to the stable voltage output of D + and D-:
in this case, in a specific application, the controller generates the conversion signal group to output to the resistance bridge circuit according to the conversion voltage and the above timing protocol, and according to the above timing protocol, the content of the conversion signal group necessarily includes two parts, one part is used for establishing handshake, and the other part is used for controlling the output charging voltage, wherein the conversion signal group for establishing handshake is a dynamically changing signal, and the conversion signal group for controlling the output charging voltage is a stable signal. After the resistance bridge circuit receives the conversion signal group, a handshake signal is generated according to the dynamic part in the conversion signal group, and an identification voltage signal is generated according to the stable part. The handshake signals are according to the timing protocol: a voltage of 0.6V is output at both D + and D-and maintained for about 1.5s, and then the output voltage of D-is changed to 0C and maintained for about 50 ms. After the handshake signals generated by the positive pole DP (namely D +) of the data line and the negative pole (namely D-) of the data line at the input end are loaded, the resistance bridge circuit can establish handshake with the quick charger. After the handshake protocol is applied (i.e., D + and D-are both output at 0.6V and held for about 1.5s, and then D-is output at 0V and held for 50ms), the resistor bridge circuit 301 applies an identification voltage signal to the positive electrode DP of the data line and the negative electrode DM of the data line at the input terminal to control the charging voltage output by the fast charger. According to the time sequence protocol, the control is specifically as follows: when the two differential signals D + and D-are fixed at 0.6V by the resistance bridge circuit 301, the QC3.0 fast charger stabilizes the output voltage at 12V according to the QC3.0 fast protocol; when the D + and the D-are respectively fixed at 3.3V and 0.6V by the resistance bridge circuit 301, the QC3.0 fast charger stabilizes the output voltage at 9V according to the QC3.0 fast protocol; when the two differential signals D + and D-are fixed at 3.3V by the resistance bridge circuit 301, the QC3.0 fast charger stabilizes the output voltage at 20V according to the QC3.0 fast protocol. Therefore, the quick charger only needs to identify the handshake signals loaded on the positive electrode DP of the data line and the negative electrode DM of the data line at the input end according to the self timing protocol, and after the handshake is established, the stable level signal values loaded on the positive pole DP of the data line and the negative pole DM of the data line are judged, therefore, charging voltage with corresponding amplitude is output according to self protocol, handshake signals and identification voltage signals loaded on D + (DP) and D- (DM) are completely controlled by the controller through the generated conversion signal group, i.e. handshaking and communication with the fast charger is actually achieved by the controller by regulating the voltage of the resistive bridge circuit, the actual charging equipment does not need to interact with the quick charger, so that the equipment without the quick charging function is charged through the quick charger, and the compatibility between a product and a power supply is realized. The device only needs to follow the mature quick charging protocol to perform handshaking and communication with the quick charger so as to control the quick charger to output corresponding charging voltage. Therefore, no matter how the fast charging technology and the fast charging protocol are changed, any technical scheme that the conversion signal group is generated by adjusting the conversion voltage according to the external requirement and reading the conversion voltage through the control module, and the conversion signal group is adjusted to be the handshake signal and the identification voltage signal through the identification module to be output to the fast charger so as to control the output of the fast charger is included in the protection scope of the present invention.
A more specific implementation of the modules of a preferred embodiment is given in fig. 3-6, which are set forth in more detail below in conjunction with the figures.
FIG. 3 schematically shows a circuit schematic of an LDO regulator circuit. As shown in fig. 3, the LDO regulator circuit 201 includes a first capacitor C1, a second capacitor C2, and a first control chip U1. One end of the first capacitor C1 is connected with the positive electrode of the power supply of the input end 101 and the input pin of the first control chip U1, and the other end is connected with the ground wire of the power supply; one end of the second capacitor C2 is connected with the reference voltage and the output pin of the first control chip U1, and the other end is connected with the power ground. The first control chip U1 stabilizes the voltage of the positive power supply terminal of the input terminal 101, and outputs the power supply voltage consistent with the reference voltage through the output pin, thereby stabilizing the input voltage of the input terminal, and ensuring that the supplied power supply voltage is constant at the voltage value of the reference voltage, for example, as shown in the figure, the circuit of the present embodiment stably outputs the power supply voltage of 3.3V.
Fig. 4 schematically shows a circuit schematic of the control module. As shown in fig. 4, the controller 401 includes a second controller chip U2, and a memory unit and a control unit disposed in the second controller chip U2. The storage unit is configured to store reference range data of the conversion voltage, the control unit is configured to read conversion voltage data of the third pin of the second control chip U2 to match the reference range data of the storage unit, generate a conversion signal group according to a matching result, and output the conversion signal group through the first pin, the fourth pin and the sixth pin of the second control chip U2. The second control chip U2 is preferably a TM57PA16-QC3D control chip. The reference range data of the conversion voltage stored in the storage unit is set according to the charging voltage value which needs to be output, for example, for a QC3.0 quick charger which can output a voltage range of 5V to 20V, the reference ranges of the conversion voltage corresponding to the output voltages of 5V gear, 9V gear, 14.5V gear and 20V gear can be respectively stored in the storage unit as follows:
for the 5V gear, the reference range of the conversion voltage corresponding to the gear stored in the storage unit is 3.387V-3.810V;
for the 9V gear, the reference range of the conversion voltage corresponding to the gear stored in the storage unit is 1.6V-1.8V;
for the 14.5V gear, the reference range of the conversion voltage corresponding to the gear stored in the storage unit is 0.533V-0.6V;
for the 20V gear, the reference range of the conversion voltage corresponding to the gear stored in the storage unit is 0.169V-0.192V.
In the present embodiment, the third pin (i.e., the AD port) of the second controller chip U2 is connected to the output terminal 501, and the first pin, the fourth pin, and the sixth pin of the second controller chip U1 are connected to the resistor bridge circuit 301. Thus, the second control chip U2 can read the converted voltage from the output terminal 501 through its third pin (i.e., AD port). And then, the control unit compares the conversion voltage with a reference range in the storage unit, generates a corresponding conversion signal group according to the reference range in which the conversion voltage is positioned, and outputs the conversion signal group to the resistance bridge circuit through the first pin, the fourth pin and the sixth pin. For example, when the switching voltage read from the output terminal is within a reference range of 5V gear (e.g., 3.387V), the control unit generates a switching signal group corresponding to 5V gear, and outputs the switching signal group to the resistor bridge circuit through the first pin, the fourth pin, and the sixth pin of the second control chip U2. The resistance bridge circuit can generate a handshake signal and an identification voltage signal according to the conversion signal group corresponding to the 5V gear to establish handshake and communication with the rapid charger, so that the rapid charger can stably output a charging voltage of 5V.
Wherein the content of the conversion signal group generated by the control unit is generated according to a fast-charging time sequence protocol. For example, for the QC2.0/3.0 fast charger timing protocol (see the detailed description of QC2.0/3.0 timing protocol above), the generated conversion signal set comprises:
(1) when the conversion voltage is in the reference range of 5V gear, the generated conversion signal group is as follows: outputting 3.3V voltage at a first pin, outputting 0V voltage at a fourth pin and outputting 0V voltage at a sixth pin of a second control chip, keeping the voltage for about 1.5s in the state, outputting 0V voltage at the first pin and outputting 0V voltage at the sixth pin, keeping the voltage for about 50ms in the state, and stabilizing the voltages output by the three pins into 0V voltage output by the first pin, 0V voltage output by the fourth pin and 0V voltage output by the sixth pin;
(2) when the conversion voltage is in the reference range of the 9V gear, the generated conversion signal group is as follows: outputting 3.3V voltage at a first pin, outputting 0V voltage at a fourth pin and outputting 0V voltage at a sixth pin of a second control chip, keeping the voltage for about 1.5s in the state, outputting 0V voltage at the first pin and outputting 0V voltage at the sixth pin, keeping the voltage for about 50ms in the state, and stabilizing the voltages output by the three pins into 3.3V voltage at the first pin, 3.3V voltage at the fourth pin and 0V voltage at the sixth pin;
(3) when the conversion voltage is in the reference range of 12V gear, the generated conversion signal group is: outputting 3.3V voltage at a first pin, outputting 0V voltage at a fourth pin and outputting 0V voltage at a sixth pin of a second control chip, keeping the voltage for about 1.5s in the state, outputting 0V voltage at the first pin and outputting 0V voltage at the sixth pin, keeping the voltage for about 50ms in the state, and stabilizing the voltages output by the three pins into 3.3V voltage at the first pin, 0V voltage at the fourth pin and 0V voltage at the sixth pin;
(4) when the conversion voltage is in the reference range of 14.5V gear, the generated conversion signal group is: outputting 3.3V voltage at a first pin, outputting 0V voltage at a fourth pin and outputting 0V voltage at a sixth pin of a second control chip, keeping the voltage for about 1.5s in the state, outputting 0V voltage at the first pin and outputting 0V voltage at the sixth pin, keeping the voltage for about 50ms in the state, and stabilizing the voltages output by the three pins into 3.3V voltage at the first pin, 0V voltage at the fourth pin and 3.3V voltage at the sixth pin;
(5) when the conversion voltage is in the reference range of the 20V gear, the generated conversion signal group is as follows: and outputting 3.3V voltage at the first pin, outputting 0V voltage at the fourth pin and outputting 0V voltage at the sixth pin of the second control chip, keeping the voltage for about 1.5s in the state, outputting 0V voltage at the first pin and outputting 0V voltage at the sixth pin, keeping the voltage for about 50ms in the state, and stabilizing the voltages output by the three pins into 3.3V voltage at the first pin, 3.3V voltage at the fourth pin and 3.3V voltage at the sixth pin.
Fig. 5 schematically shows a circuit schematic of a resistive bridge circuit. As shown in fig. 5, the resistor bridge circuit 301 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The sixth resistor R6 is connected in series with the eighth resistor R8, and the seventh resistor R7 is connected in series with the ninth resistor R9. In addition, the sixth resistor R6 is connected to an output pin of the first control chip of the LDO regulator circuit 201 to obtain a stable power supply voltage, and the seventh resistor R7, the eighth resistor R8, and the ninth resistor R9 are respectively connected to the first pin, the fourth pin, and the sixth pin of the second control chip U2 to obtain a conversion signal group. A first detection point is arranged between the sixth resistor R6 and the eighth resistor R8, a second detection point is arranged between the seventh resistor R7 and the ninth resistor R9, the first detection point is connected to the positive electrode DP of the data line of the input terminal 101, and the second detection point is connected to the negative electrode DM of the data line of the input terminal 101. The control unit of the second control chip U2 generates the switching signal group corresponding to the corresponding gear according to the switching voltage control of the output terminal 501, after the resistance bridge circuit 301 receives the switching signal group through the first pin, the fourth pin and the sixth pin, respectively generating a handshake signal and an identification voltage signal according to the conversion signal group, loading the handshake signal and the identification voltage signal on the positive pole DP of the data line and the negative pole DM of the data line, transmitting the signals to a control chip of the quick charger through an input end, thereby enabling the second control chip U2 of the converter to handshake and communicate with the control chip of the fast charger, and according to the stable level loaded on the positive electrode DP of the data line and the negative electrode DM of the data line, the quick charger is controlled to output stable voltage (such as 5V or 9V or 14.5V or 20V) with corresponding amplitude, and the quick charger is used for charging non-quick-charging equipment. As can be seen from the foregoing description, the resistance bridge circuit 301 generates the handshake signals according to the converted signal group, wherein the handshake signals are generated according to the changed voltage values in the converted signal group, and the identification voltage signals are generated according to the stabilized voltage values in the converted signal group. For example, according to the content of the conversion signal group generated by the above-mentioned timing protocol corresponding to the QC2.0/3.0 fast charger, for the content of the conversion signal group in the 9V range, the resistance bridge circuit 301 first outputs a 3.3V voltage at the first pin, a 0V voltage at the fourth pin, and a 0V voltage at the sixth pin, and keeps about 1.5s in this state, and then outputs a 0V voltage at the first pin, outputs a 0V voltage at the sixth pin, and keeps about 50ms in this state, and generates a handshake signal; and then generating an identification voltage signal according to the content of a conversion signal group of stabilizing the voltage output by the three pins into a voltage of 3.3V output by the first pin, a voltage of 3.3V output by the fourth pin and a voltage of 0V output by the sixth pin. Wherein, according to the content of the switching signal group, referring to the resistance bridge circuit of fig. 5, the generated handshake signals are to generate a voltage of 0.6V at the position of the first detection point and maintain about 1.5s, and simultaneously generate a voltage of 0.6V at the position of the second detection point and maintain about 1.5s, and then generate a voltage of 0V at the position of the second detection point and maintain about 50 ms. Thus, the generated handshake signals are output at the positive electrode DP of the data line and the negative electrode DM of the data line of the input terminal, and the fast charger can detect the handshake signals and establish handshake with the conversion device through the handshake signals. Then, the resistance bridge circuit generates the identification voltage signal to generate a stabilized voltage of 3.3V at the position of the first detection point and a stabilized voltage of 0.6V at the position of the second detection point according to the content of the conversion signal group. Thus, the identification voltage signal is generated and outputted between the positive electrode DP of the data line and the negative electrode DM of the data line at the input terminal, and the fast charger enters a 9V mode according to the detected identification voltage signal, thereby stably outputting a 9V charging voltage. Therefore, the control module can control the level change of the first detection point and the second detection point of the resistance bridge circuit through the generated conversion signal group, so that the voltage signals output by the positive electrode DP of the data line and the negative electrode DM of the data line at the input end are switched according to the time sequence protocol of the quick charger, and the quick charger is controlled to output the charging voltage meeting the requirement.
Fig. 6 schematically shows a circuit schematic of the output. As shown in fig. 6, the output terminal 501 includes a first resistor R1, a second resistor R2, and a third resistor R3, the third resistor R3 is connected in series with the first resistor R1, the first resistor R1 is connected to the positive pole of the power supply, and the third resistor R3 is connected to the ground of the power supply, wherein a monitor point VR is disposed between the first resistor R1 and the third resistor R3, and the monitor point is connected to the third pin (i.e., the AD port) of the second control chip U2 through the second resistor R2. In specific use, the output end 501 is connected with a charging head of the charging device or connected with a matching conversion head, so that the resistance range of the resistor of the output end can be adjusted according to the voltage requirement of the charging head or the conversion head, different resistances are generated at a monitoring point VR, and the purpose of outputting different conversion voltages to a third pin of the second control chip U2 is achieved. The resistance of the output terminal 501 may be adjusted by providing the converters with different voltage amplitudes, such as the 5V-shift converter, the 9V-shift converter, the 12V-shift converter, the 14.5V-shift converter, and the 20V-shift converter, and providing the resistors with corresponding resistance values in the converters. When the switching head is used, the switching head is inserted into a monitoring point VR wiring hole, a VBUS wiring hole and a ground wire hole of the output end 501, so that the resistors in the switching head are connected with the first resistor R1 in parallel at the VBUS end and the VR end or connected with the third resistor R3 in parallel at the VR end and the power ground wire end, and therefore the resistance value of the monitoring point VR is adjusted, and the purpose of adjusting the switching voltage of the AD port is achieved. The implementation scheme of providing resistors with different resistance values in the converter or the charging head to adjust the resistance of the output end may specifically be, for example, when the output end is connected to a 5V charging head or the converter, connecting a resistance value of 4.32K to the positive power supply VBUS at the monitoring point VR, so that the conversion voltage output to the third pin of the second control chip U2 is within a reference range of 3.387V-3.810V; when the output end is connected with a 9V charging head or a conversion head, the resistance value of the power supply anode VBUS at the monitoring point VR to the 24K is connected, so that the conversion voltage output to the third pin of the second control chip U2 is in a reference range of 1.6V-1.8V; when the output end is connected with a 14.5V charging head or a conversion head, the resistance value of the power supply positive electrode VBUS to the monitoring point VR is connected with 240K, so that the conversion voltage output to the third pin of the second control chip U2 is in a reference range of 0.533V-0.6V; or when the output terminal is connected with the 20V conversion head, the resistance value of the monitoring point VR to the power ground wire 7.87K is ensured, so that the conversion voltage output to the third pin of the second control chip U2 is in the reference range of 0.169V-0.192V. Therefore, the control unit in the second control chip U2 can generate a corresponding switching signal group according to the read switching voltage, so as to control the resistance bridge circuit 301 to output different levels, so that the fast charger outputs a voltage matched with the charging head or the switching head.
The conversion device provided by the embodiment of the invention can realize charging of more devices by using a quick charging technology, not only can charge devices such as a smart phone, but also can thoroughly reach a high voltage of 20V, and realize charging of a notebook computer and the like. And different conversion heads are matched, so that the charging of the non-quick-charging equipment can be realized, the quick-charging of the non-quick-charging equipment can also be realized, and the regulation of the charging voltage is very flexible and convenient.
In a specific application corresponding to the QC2.0/3.0 fast charging technology, in order to ensure that the output terminal 501 and the resistor bridge circuit 301 can output corresponding voltage values, it is preferable to set the first resistor R1 in the output terminal 501 to 100K, the second resistor R2 to 1.5K, and the third resistor R3 to 10K, and the resistance values of the resistors in the conversion head can be set according to the type of the conversion head, so as to achieve the above-described purpose of adjusting the resistance values. In a specific application, the resistance values can also be set to other values, and the adjustment can be realized by connecting other resistors in parallel, such as connecting a fourth resistor, a fifth resistor and the like in parallel on a third resistor, and the purpose of adjusting the voltage value of the converted voltage as required is considered to be within the scope of the disclosure of the present invention. For the resistor bridge circuit, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 in the resistor bridge circuit 301 may be set to 10K, the seventh resistor R7 and the eighth resistor R8 may be set to 2.2K, and the ninth resistor R9 may be set to 470 ohms, so as to ensure that voltage outputs of 0V, 0.6V or 3.3V are generated at the first detection point and the second detection point according to the switching signal set output from the first pin, the fourth pin and the sixth pin of the second control chip, so as to perform handshaking and communication with the fast charger based on the fast charging protocol. The resistance values of the resistors in the resistor bridge circuit can be other values as long as the voltages of the first detection point and the second detection point can be switched between 0V, 0.6V and 3.3V according to the output of the conversion signal group.
Fig. 7 schematically shows a flow of a method for charge conversion by the fast charge conversion device shown in fig. 2. As shown in fig. 7, the method includes:
step S700: the input end of the quick charging conversion device is connected to the quick charger, and the output end of the quick charging conversion device is connected to the charging equipment through the charging head or the conversion head.
When charging is started, the charging device is first connected to the quick charger through the quick charge conversion device of the embodiment of the present invention. Specifically, the input end of the fast charge conversion device is connected to the fast charger, and the output end of the fast charge conversion device is connected to the charging equipment. The output end can be directly connected to the charging device through a charging head of the charging device, or can be connected to the charging device through a matched conversion head. According to different voltage values required by the charging equipment, the conversion heads can comprise a 5V-gear conversion head, a 9V-gear conversion head, a 12V-gear conversion head, a 14.5-gear conversion head and a 20V-gear conversion head, so as to be connected through the corresponding conversion heads according to the requirements of the charging equipment. For example, when a general mobile phone is charged by using the fast charger, 5V charging can be realized by directly connecting the mobile phone to the output terminal, and if a notebook computer is charged by using the fast charger, the connection is performed by using a 20V-shift conversion head.
Step S701: the output end outputs the converted voltage to a third pin of the second control chip according to the type of the connected charging head or the type of the connected converting head.
The fast charge converting device recognizes the type of the charging head or the converting head, and adjusts the resistance value thereof according to the type of the charging head or the converting head (e.g., 5V gear, 20V gear, etc.), so as to generate a varying resistance value at the monitoring point VR, and further generate a different converted voltage value at the AD, and output the converted voltage to the third pin of the second control chip U2. For example, when the output terminal is connected with a 5V charging head or a conversion head, the resistance value of the power supply positive electrode VBUS is connected with 4.32K at the monitoring point VR, so that the conversion voltage output to the third pin of the second control chip U2 is in a reference range of 3.387V-3.810V; when the output end is connected with a 9V charging head or a conversion head, the resistance value of the power supply anode VBUS at the monitoring point VR to the 24K is connected, so that the conversion voltage output to the third pin of the second control chip U2 is in a reference range of 1.6V-1.8V; when the output end is connected with a 14.5V charging head or a conversion head, the resistance value of the power supply positive electrode VBUS to the monitoring point VR is connected with 240K, so that the conversion voltage output to the third pin of the second control chip U2 is in a reference range of 0.533V-0.6V; or when the output terminal is connected with the 20V conversion head, the resistance value of the monitoring point VR to the power ground wire 7.87K is ensured, so that the conversion voltage output to the third pin of the second control chip U2 is in the reference range of 0.169V-0.192V.
Step S702: and the second control chip performs matching according to the read conversion voltage value and the stored reference range of the conversion voltage, generates a conversion signal group, and outputs the conversion signal group through the first pin, the fourth pin and the sixth pin.
And the control unit of the second control chip reads the data of the third pin, acquires the reference range from the storage unit for judgment, generates a corresponding conversion signal group according to the judgment result, and outputs the conversion signal group through the first pin, the fourth pin and the sixth pin. The generated conversion signal set can refer to the foregoing description, and is not described herein again.
Step S703: and the resistance bridge circuit generates identification voltage signals at the first detection point and the second detection point according to the received conversion signal group and outputs the identification voltage signals through the input end.
The resistance bridge circuit receives corresponding conversion signals (namely voltage output) through a first pin, a fourth pin and a sixth pin of the second control chip respectively, so that different voltage values (including a handshake signal and an identification voltage signal) are formed at a first detection point and a second detection point, the D + and D-voltages at the input end are switched among 0.6V, 3.3V and 0V according to a time sequence protocol, handshake and communication are carried out with the quick charger, and the handshake signal and the identification voltage signal are transmitted to the quick charger. The generated handshake signal and the identification voltage signal may be implemented according to a fast charging protocol, which may refer to the foregoing description and will not be described in detail herein.
Step S704: the quick charger stably outputs the charging voltage with corresponding amplitude by reading the identification voltage signal output by the input end.
The quick charger reads handshake signals of the positive electrode of the data line and the negative electrode of the data line at the input end to establish handshake with the conversion device, reads identification voltage signals at the input end after the handshake, and outputs corresponding charging voltage according to a time sequence protocol. Therefore, the step S700 to the step S704 realize that the conversion device of the present invention is used to control the fast charger, so as to use the fast charger to charge various devices, especially devices that do not realize the fast charging technology, which expands the application range of the fast charger and improves the expandability of the fast charger. Moreover, the conversion device of the invention can enable the charging voltage output by the quick charger to reach the maximum value of 20V, thereby realizing the application of the quick charger on equipment such as a notebook computer and the like and expanding the application range of the quick charger.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A switching device for a fast charger, comprising: the intelligent voltage regulation system comprises an input end (101), a voltage regulation module (20), an identification module (30), a control module (40) and an output end (501), wherein the input end (101) is respectively connected with the voltage regulation module (20) and the identification module (30), the voltage regulation module (20) is respectively connected with the identification module (30) and the control module (40), the identification module (30) is connected with the control module (40), and the control module (40) is connected with the output end (501); wherein,
the voltage stabilizing module (20) receives the power supply voltage through the input end (101) to perform voltage stabilizing processing, and outputs the power supply voltage after voltage stabilizing processing to the identification module (30) and the control module (40);
the control module (40) reads the conversion voltage of the output end (501), generates a conversion signal group according to the conversion voltage and outputs the conversion signal group to the identification module (30);
the identification module (30) generates a handshake signal and an identification voltage signal according to the conversion signal group and outputs the handshake signal and the identification voltage signal through the input end (101).
2. The switching device according to claim 1, wherein the control module (40) comprises a second control chip (U2), and a memory unit and a control unit arranged in the second control chip (U2), the control module (40) is connected to the output terminal (501) via a third pin of the second control chip (U2), and is connected to the identification module (30) via a first pin, a fourth pin and a sixth pin of the second control chip (U2), wherein,
the memory unit is configured to store reference range data of a conversion voltage, and the control unit is configured to read conversion voltage data of a third pin of the second control chip (U2) to match the reference range data of the memory unit, generate a conversion signal group according to a matching result, and output the conversion signal group through a first pin, a fourth pin, and a sixth pin of the second control chip (U2).
3. The conversion arrangement according to claim 2, wherein the output terminal (501) comprises a first resistor (R1), a second resistor (R2) and a third resistor (R3), the third resistor (R3) being connected in series with the first resistor (R1), the first resistor (R1) being connected to the positive supply terminal and the third resistor (R3) being connected to the ground supply terminal, wherein,
a monitoring point (VR) is arranged between the first resistor (R1) and the third resistor (R3), one end of the second resistor (R2) is connected with the monitoring point (VR), and the other end of the second resistor is connected with the third pin of the second control chip (U2).
4. The conversion arrangement according to claim 2, characterized in that the identification module (30) is a resistor bridge circuit (301) comprising a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8) and a ninth resistor (R9), wherein,
the sixth resistor (R6) and an eighth resistor (R8) are connected in series, the sixth resistor (R6) is connected with the voltage stabilizing module (20), and the eighth resistor (R8) is connected with a fourth pin of the second control chip (U2);
the seventh resistor (R7) and a ninth resistor (R9) are connected in series, the seventh resistor (R7) is connected with the first pin of the second control chip (U2), and the ninth resistor (R9) is connected with the sixth pin of the second control chip (U2);
a first detection point is arranged between the sixth resistor (R6) and the eighth resistor (R8), a second detection point is arranged between the seventh resistor (R7) and the ninth resistor (R9), the first detection point is connected to the positive electrode (DP) of the data line of the input end (101), and the second detection point is connected to the negative electrode (DM) of the data line of the input end (101).
5. The conversion arrangement according to any of claims 1 to 4, wherein the regulator module (20) is an LDO regulator circuit (201), the LDO regulator circuit (201) comprising a first capacitor (C1), a second capacitor (C2) and a first control chip (U1), wherein,
one end of the first capacitor (C1) is respectively connected with the positive power supply electrode of the input end (101) and the input pin of the first control chip (U1), and the other end of the first capacitor (C1) is connected with the power supply ground wire;
one end of the second capacitor (C2) is respectively connected with the reference voltage and the output pin of the first control chip (U1), and the other end of the second capacitor is connected with the power supply ground wire.
6. The switching device according to claim 5, further comprising a switching connector, wherein the switching connector is divided into a 5V shift switching head, a 9V shift switching head, a 12V shift switching head, a 14.5V shift switching head and a 20V shift switching head, and the switching heads are connected to the output terminal to control the value of the switching voltage output by the output terminal.
7. Method for performing charging conversion by means of a conversion device according to any one of claims 1 to 6, comprising:
the output end outputs corresponding conversion voltage according to the type of the connected charging connector;
the control module reads the conversion voltage data and generates a conversion signal group according to the conversion voltage data;
the identification module generates a handshake signal and an identification voltage signal according to the conversion signal group, and outputs the generated handshake signal and identification voltage signal through an input end.
8. The method of claim 7, wherein the control module (40) includes a second control chip (U2), and a memory unit and a control unit configured in the second control chip (U2), the control module (40) is connected to the output terminal (501) through a third pin of the second control chip (U2) and to the identification module (30) through a first pin, a fourth pin, and a sixth pin of the second control chip (U2), the reading the conversion voltage data, and the generating the conversion signal group according to the conversion voltage data includes:
reading the converted voltage data through a third pin of the second control chip;
the control unit compares the read conversion voltage data with reference range data stored in the storage unit in advance, and generates a conversion signal group according to a comparison result and outputs the conversion signal group through a first pin, a fourth pin and a sixth pin of the second control chip.
9. The method of claim 8, wherein the conversion signal group includes a dynamically changing voltage signal and a stable voltage signal, the generating a handshake signal and an identification voltage signal from the conversion signal group, and outputting the generated handshake signal and identification voltage signal through an input terminal includes:
generating handshake signals according to the dynamically changed voltage signals in the conversion signal group, and loading the handshake signals on the positive electrode end and the negative electrode end of the data line of the input end;
and generating identification voltage signals according to the stable voltage signals in the conversion signal group, and loading the identification voltage signals on the positive electrode end and the negative electrode end of the data line of the input end.
10. The method according to any one of claims 7 to 9, wherein the types of the connected charging connectors include a 5V gear conversion connector, a 9V gear conversion connector, a 12V gear conversion connector, a 14.5V gear conversion connector and a 20V gear conversion connector, and the outputting the corresponding conversion voltages according to the types of the connected charging connectors includes:
when the output end is connected with the 5V gear conversion head, the monitoring point at the output end is connected with the resistance value of 4.32K to the positive pole of the power supply so as to output 3.387V-3.810V conversion voltage to the third pin of the second control chip;
when the output end is connected with the 9V gear conversion head, the resistance value of the monitoring point at the output end to the power supply positive electrode connection 24K is used for outputting the conversion voltage of 1.6V-1.8V to the third pin of the second control chip;
when the output end is connected with the 14.5V gear conversion head, the resistance value of the monitoring point at the output end to the power supply positive electrode connection 240K is used for outputting the conversion voltage of 0.533V-0.6V to the third pin of the second control chip;
when the output end is connected with the 20V gear conversion head, the resistance value of the monitoring point at the output end to the power ground wire is 7.87K, so that the conversion voltage of 0.169V-0.192V is output to the third pin of the second control chip.
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