CN106936178B - Charging method and charging circuit of direct current handshake - Google Patents
Charging method and charging circuit of direct current handshake Download PDFInfo
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- CN106936178B CN106936178B CN201611212899.9A CN201611212899A CN106936178B CN 106936178 B CN106936178 B CN 106936178B CN 201611212899 A CN201611212899 A CN 201611212899A CN 106936178 B CN106936178 B CN 106936178B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 62
- 210000001503 joint Anatomy 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H02J7/0077—
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- H02J7/045—
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H02J2007/10—
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
Abstract
The invention discloses a charging method of direct current handshake, which comprises the following steps: performing PWM modulation on the charged direct-current voltage to obtain a PWM charging voltage; and the charging equipment and the charged equipment carry out charging handshake in an idle period of the PWM charging voltage, wherein the idle period is a low-level time period of the PWM charging voltage. The invention also discloses a charging circuit for the direct-current handshake. The invention can realize handshake charging without changing the existing communication interface, judge the legality of the charged equipment, avoid the equipment damage and the safety accident, and can also pre-charge the charged equipment without a power supply.
Description
Technical Field
The present invention relates to a dc charging method, and in particular, to a charging method and a charging circuit for dc handshaking.
Background
As more and more devices use mobile power sources, charging becomes an important issue. How to make charging device can provide charging voltage and charging current according to the requirement of the equipment that is charged to reach the purpose of quick, effective, safe charging and become for charging device's research direction, current implementation is to add a communication line beside the charging wire, realizes that the action of shaking hands of charging reaches individualized charging requirement, but installs the shape that the communication line will change the interface additional, is unfavorable for using widely.
Disclosure of Invention
The invention mainly aims to provide a charging method and a charging circuit of a direct current handshake, and aims to realize charging handshake by using the existing communication interface.
In order to achieve the above object, the present invention provides a charging method for dc handshake, which includes the following steps:
performing PWM modulation on the charged direct-current voltage to obtain a PWM charging voltage;
and the charging equipment and the charged equipment carry out charging handshake in an idle period of the PWM charging voltage, wherein the idle period is a low-level time period of the PWM charging voltage.
Preferably, the charging handshake manner is that the charging device or the charged device loads a handshake signal on an idle period of the PWM charging voltage.
Preferably, the charging method for the dc handshake includes a waiting state, a handshake state and a charging state, where the waiting state is a state in which the charging device is not docked with the charged device, the handshake state is a state in which the charging device and the charged device are already docked and handshake communication is being performed, and the charging state is a charging state in which the charging device and the charged device are already docked and handshake communication is performed; the butt joint is that the charged device continuously receives a signal sent by the charging device within the time period of T, namely, the charging device and the charged device are judged to be in butt joint.
Preferably, the handshake signal includes information of the waiting current and the waiting voltage sent by the charging device in the waiting state, and adjustment information sent to the charging device by the charged device after the waiting current and the waiting voltage sent by the charging device are received and found to be beyond the allowable range of the charged device.
Preferably, the handshake signal further includes requirement information sent by the charged device to the charging device in the handshake state, where the requirement information includes required current and voltage values of the charged device.
Preferably, the handshake signals sent by the charging device and the handshake signals sent by the charged device alternately appear in idle periods.
Preferably, after the docking is successful, the device to be charged sends out the requirement information, and if the confirmation information sent out by the charging device is not received within the time T', the requirement information is sent out again, and when the number of times of sending out the requirement information is greater than N, the device to be charged closes the charging channel.
Preferably, the charging handshake manner is that the charging device or the device to be charged performs charging handshake by detecting the voltage of the charging port.
The invention also provides a charging circuit using the charging method, which comprises a charging circuit and a charged circuit, wherein the charging circuit comprises a rectifying module, a first switch, a first communication chip, a first level conducting switch and a first charging interface which are sequentially connected; when the first switch is disconnected, the second communication chip sends a high level or a low level to the first level conducting switch through the second charging interface and the first charging interface, so that the first level conducting switch is switched on or off, the first communication chip receives low level or high level information, or the first communication chip sends a high level or a low level to the second level conducting switch through the first charging interface and the second charging interface, so that the second level conducting switch is switched on or off, and the second communication chip receives low level or high level information.
The invention also provides another charging circuit using the charging method, which comprises a charging circuit and a charged circuit, wherein the charging circuit comprises a rectifying module, a first switch, a first communication chip, a first voltage division circuit and a first charging interface which are connected in sequence; when the first switch is closed and the second switch is opened, the first communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the second voltage division circuit; when the first switch is turned off and the second switch is turned on, the first communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the second voltage division circuit.
The invention can realize handshake charging without changing the existing communication interface, judge the legality of the charged equipment, avoid the equipment damage and the safety accident, and can also pre-charge the charged equipment without a power supply.
Drawings
FIG. 1 is a diagram illustrating a waiting state of a charging method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a handshake state according to an embodiment of a charging method;
FIG. 3 is a schematic diagram of a charging state of the charging method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a charging circuit according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a charging method of direct current handshake, referring to fig. 1-3, in a first embodiment, the charging method includes the following steps:
performing PWM modulation on the charged direct-current voltage to obtain a PWM charging voltage;
and loading the handshake signals in an idle period of the PWM charging voltage to perform charging handshake, wherein the idle period is a low-level time period of the PWM charging voltage.
The charging voltage in the form of square waves is obtained by performing PWM modulation on the existing direct-current voltage, so that the charging equipment and the charged equipment can communicate in the idle period of the PWM charging voltage, and the charging equipment and the charged equipment can communicate by using a charging interface.
Based on the first embodiment, in the second embodiment, the charging method for dc handshake includes a waiting state, a handshake state and a charging state, where the waiting state is a state where the charging device is not docked with the charged device, the handshake state is a state where the charging device and the charged device are already docked and handshake communication is being performed, and the charging state is a charging state where the charging device and the charged device are already docked and handshake-finished; the butt joint is that the charged equipment continuously receives signals sent by the charging equipment within the time period of T, namely, the butt joint of the charging equipment and the charged equipment is judged;
the period of the PWM charging voltage in the waiting state and the handshaking state is Tht, the low-level charging voltage is Vh, the duration is Th, the idle period is Th0, Tht = Th + Th0, and DRh = Th/Tht; the period of the PWM charging voltage in the charging state is Tct, the high-level charging voltage is Vc, the duration time is Tc, the idle period is Tc0, Tct = Tc + Tc0, and DRc = Tc/Tct.
The charging equipment controls the output current to be a very small value through DRh in a waiting state, at the moment, a device cannot be damaged even if a charging port is short-circuited, and Vh output in the waiting state is used for supplying power to the charged equipment without a power supply, so that the charged equipment can work and receives a handshaking signal; the value of Vh can be selected and set between 2/3-3/4 Vc, and the value of Vc is selected from the actual working environment.
Based on the above embodiments, in a third embodiment, the handshake signal includes information of a waiting current and a waiting voltage sent by the charging device in a waiting state, and adjustment information sent to the charging device by the charged device after the waiting current and the waiting voltage are found to exceed an allowable range of the charged device after the charged device receives the information of the waiting current and the waiting voltage sent by the charging device; when the charging device is in a handshake state, the charged device sends out demand information to the charging device, wherein the demand information comprises current and voltage values required by the charged device;
the charge state may not have a handshake signal, but when the charge state has a handshake signal, the handshake signal may be information of a charge voltage and a charge current sent by the charging device;
handshake signals: between the PWM DC high levels, some rectangular pulses, which the charging device and the device to be charged can resolve to a digital signal. Vt is a high level voltage of the communication signal, and Vt is less than or equal to Vh.
In order to make the communication orderly, the handshake signals sent by the charging device and the handshake signals sent by the charged device can be alternately generated in the idle period.
Based on the above embodiments, in the fourth embodiment, after the docking is successful, the charged device sends out the demand information, and if the confirmation information sent out by the charging device is not received within the time T', the demand information is sent out again, and when the number of times of sending out the demand information is greater than N, the charged device closes the charging channel.
Referring to fig. 4, the present invention further provides a charging circuit using the above charging method, including a charging circuit and a charged circuit, where the charging circuit includes a rectifying module, a first switch, a first communication chip, a first level conducting switch and a first charging interface, which are connected in sequence, the charging circuit further includes a first communication voltage, the first communication voltage is connected between the first communication chip and the first level conducting switch through a resistor, the charged circuit includes a second charging interface, a second communication chip and a second level conducting switch, which are connected in sequence, the charged circuit further includes a second communication voltage, and the second communication voltage is connected between the second communication chip and the second level conducting switch through a resistor; when the first switch is disconnected, the second communication chip sends a high level or a low level to the first level conducting switch through the second charging interface and the first charging interface, so that the first level conducting switch is switched on or off, the first communication chip receives low level or high level information, or the first communication chip sends a high level or a low level to the second level conducting switch through the first charging interface and the second charging interface, so that the second level conducting switch is switched on or off, and the second communication chip receives low level or high level information.
In this embodiment, the first level conducting switch and the second level conducting switch are both triacs, the connection modes are that the emitter and the base are connected to two ends of the charging port, the collector is connected to the communication port of the first communication chip and the communication port of the second communication chip, and the first charging port is further connected in parallel with a voltage regulator tube.
The invention also provides a charging method of the direct-current handshake, which comprises the following steps:
performing PWM modulation on the charged direct current to obtain PWM charging current;
the charging handshake is performed by detecting the voltage of the charging port.
The charging voltage in the form of square waves is obtained by performing PWM modulation on the existing direct-current voltage, so that the charging equipment and the charged equipment can communicate in the idle period of the PWM charging voltage, and the charging equipment and the charged equipment can communicate by using a charging interface.
The invention also provides a charging circuit for direct-current handshake, which comprises a charging circuit and a charged circuit, wherein the charging circuit comprises a rectifying module, a first switch, a first communication chip, a first voltage division circuit and a first charging interface which are connected in sequence; when the first switch is closed and the second switch is opened, the first communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the second voltage division circuit; when the first switch is turned off and the second switch is turned on, the first communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the second voltage division circuit.
In this embodiment, the voltage collecting end of the first communication chip and the voltage collecting end of the second communication chip are both connected to two ends of the charging interface through resistors respectively, and a voltage regulator tube is further connected to the first charging interface in parallel.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A charging method of direct current handshake is characterized by comprising the following steps:
performing PWM modulation on the charged direct-current voltage to obtain a PWM charging voltage;
charging equipment and charged equipment perform charging handshake in an idle period of PWM charging voltage, wherein the idle period is a low-level time period of the PWM charging voltage;
the charging method of the direct-current handshake comprises a waiting state, a handshake state and a charging state, wherein the waiting state is a state that the charging equipment is not in butt joint with the charged equipment, the handshake state is a state that the charging equipment and the charged equipment are in butt joint and are in handshake communication, and the charging state is a charging state after the charging equipment and the charged equipment are in butt joint and handshake; the butt joint is that the charged equipment continuously receives signals sent by the charging equipment within the time period of T, namely, the butt joint of the charging equipment and the charged equipment is judged;
the period of the PWM charging voltage in the waiting state and the handshaking state is Tht, the duration is Th, the idle period is Th0, Tht = Th + Th0, the ratio of Th to Tht is defined as DRh, and the charging device controls the output current according to the DRh value in the waiting state.
2. The charging method of claim 1, wherein the charging handshake manner is that a charging device or a charged device applies a handshake signal to an idle period of the PWM charging voltage.
3. The charging method according to claim 2, wherein the handshake signals include information of the waiting current and the waiting voltage sent by the charging device in the waiting state, and adjustment information sent by the charged device to the charging device after receiving the information of the waiting current and the waiting voltage sent by the charging device and finding that the waiting current and the waiting voltage are beyond the allowable range of the charged device.
4. The charging method of claim 2, wherein the handshake signals further include demand information issued by the charged device to the charging device during the handshake state, the demand information including required current and voltage values of the charged device.
5. The charging method according to claim 2, wherein the handshake signals issued by the charging device and the handshake signals issued by the charged device alternately occur in idle periods.
6. The charging method according to claim 4, wherein after the docking is successful, the device to be charged sends out the demand information, and if the confirmation information sent out by the charging device is not received within the time T', the demand information is sent out again, and when the number of times of sending out the demand information is greater than N, the device to be charged closes the charging channel.
7. The charging method according to claim 1, wherein the charging handshake manner is that the charging device or the device to be charged performs charging handshake by detecting a voltage of the charging port.
8. A charging circuit using the charging method according to any one of claims 1 to 6, comprising a charging circuit and a charged circuit, wherein the charging circuit comprises a rectifying module, a first switch, a first communication chip, a first level conducting switch and a first charging interface which are connected in sequence, the charging circuit further comprises a first communication voltage, the first communication voltage is connected between the first communication chip and the first level conducting switch through a resistor, the charged circuit comprises a second charging interface, a second communication chip and a second level conducting switch which are connected in sequence, the charged circuit further comprises a second communication voltage, and the second communication voltage is connected between the second communication chip and the second level conducting switch through a resistor; when the first switch is disconnected, the second communication chip sends a high level or a low level to the first level conducting switch through the second charging interface and the first charging interface, so that the first level conducting switch is switched on or off, the first communication chip receives low level or high level information, or the first communication chip sends a high level or a low level to the second level conducting switch through the first charging interface and the second charging interface, so that the second level conducting switch is switched on or off, and the second communication chip receives low level or high level information.
9. A charging circuit using the charging method according to claim 7, comprising a charging circuit and a charged circuit, wherein the charging circuit comprises a rectifying module, a first switch, a first communication chip, a first voltage dividing circuit and a first charging interface which are connected in sequence, and the charging circuit comprises a second charging interface, a second communication chip, a second voltage dividing circuit, a second switch and a power module of a charged device which are connected in sequence; when the first switch is closed and the second switch is opened, the first communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charging voltage of the charging circuit through the voltage value obtained by the second voltage division circuit; when the first switch is turned off and the second switch is turned on, the first communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the first voltage division circuit, and the second communication chip obtains the charged voltage of the charging circuit through the voltage value obtained by the second voltage division circuit.
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| CN201611212899.9A CN106936178B (en) | 2016-12-25 | 2016-12-25 | Charging method and charging circuit of direct current handshake |
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| CN201611212899.9A CN106936178B (en) | 2016-12-25 | 2016-12-25 | Charging method and charging circuit of direct current handshake |
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| CN106936178B true CN106936178B (en) | 2020-04-21 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855780A (en) * | 2012-11-28 | 2014-06-11 | 瑞萨电子株式会社 | Semiconductor integrated circuit and operation method of the same |
| CN104065149A (en) * | 2014-07-09 | 2014-09-24 | 昂宝电子（上海）有限公司 | Charge control circuit, flyback type power source transformation system and charge control method |
| CN104701583A (en) * | 2015-04-09 | 2015-06-10 | 福州瑞芯微电子有限公司 | Battery charging method based on USB interface, adapter, electric equipment and system |
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| US10348102B2 (en) * | 2014-08-20 | 2019-07-09 | Walter Lee Davis | Magnetic capacitor energy module and applications thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855780A (en) * | 2012-11-28 | 2014-06-11 | 瑞萨电子株式会社 | Semiconductor integrated circuit and operation method of the same |
| CN104065149A (en) * | 2014-07-09 | 2014-09-24 | 昂宝电子（上海）有限公司 | Charge control circuit, flyback type power source transformation system and charge control method |
| CN104701583A (en) * | 2015-04-09 | 2015-06-10 | 福州瑞芯微电子有限公司 | Battery charging method based on USB interface, adapter, electric equipment and system |
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