TWI653520B - Adapter and charging control method - Google Patents

Abstract

An adapter and a charging control method are provided, the adapter comprising: a power conversion unit for converting an input alternating current to obtain an output voltage and an output current of the adapter, the output current of the adapter is a current of the first pulsating waveform; and the sampling and holding unit And connected to the power conversion unit, when the sample holding unit is in the sampling state, the sample holding unit is configured to sample the current of the first pulsation waveform, and the sample holding unit is configured to maintain the first pulsation waveform when the sample holding unit is in the holding state The current collecting control unit is connected to the sample holding unit for determining whether the sample holding unit is in the hold state, and collecting the first pulsation held by the sample holding unit while determining that the sample holding unit is in the hold state The peak value of the current of the waveform. The adapter of the embodiment of the invention can increase the service life of the battery.

Description

Adapter and charging control method

Embodiments of the present invention relate to the field of charging and, more particularly, to an adapter and charging control method.

The adapter, also known as a power adapter, is used to charge a device to be charged, such as a terminal. Currentlyadays, adapters on the market usually charge a device to be charged (such as a terminal) in a constant voltage manner. Since the battery in the device to be charged is generally a lithium battery, charging the device to be charged by using a constant voltage method is liable to cause lithium deposition, resulting in a decrease in the life of the battery.

Embodiments of the present invention provide an adapter and a charging control method to reduce lithium deposition of a battery and improve the service life of the battery.

In a first aspect, an adapter is provided, the adapter includes: a power conversion unit configured to convert an input alternating current to obtain an output voltage and an output current of the adapter, wherein an output current of the adapter is a current of a first pulsating waveform; a sample holding unit connected to the power conversion unit, wherein the sample holding unit is configured to sample a current of the first pulsation waveform when the sample holding unit is in a sampling state, and the sampling is performed when the sample holding unit is in a holding state The holding unit is configured to maintain a peak value of the current of the first pulsation waveform; the current collection control unit is connected to the sample and hold unit, and the current collection control unit is configured to determine whether the sample and hold unit is in a hold state, and determine the sampling When the holding unit is in the holding state, the peak value of the current of the first pulsation waveform held by the sample holding unit is acquired.

In a second aspect, a charging control method is provided, the method being applied to an adapter, the adapter comprising a power conversion unit and a sample and hold unit, wherein the power conversion unit is configured to convert an input alternating current to obtain an output voltage and an output current of the adapter The output current of the adapter is a current of a first pulsation waveform, and the sample holding unit is connected to the power conversion unit, and the sample holding unit is configured to apply current to the first pulsation waveform when the sample holding unit is in a sampling state Sampling, the sample holding unit is configured to maintain a peak value of the current of the first pulsation waveform when the sample holding unit is in a hold state, the method comprising: determining whether the sample hold unit is in a hold state; determining the sample hold When the cell is in the hold state, the peak value of the current of the first pulsation waveform held by the sample hold unit is acquired.

The output current of the adapter of the embodiment of the present invention is a current of a pulsating waveform (or pulsating direct current), and the current of the pulsating waveform can reduce the lithium deposition phenomenon of the battery. In addition, the current of the pulsating waveform can reduce the probability and intensity of the arcing of the contacts of the charging interface and increase the life of the charging interface.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

A first adapter for charging a device to be charged, such as a terminal, is mentioned in the related art. The first adapter operates in a constant voltage mode. In the constant voltage mode, the voltage output by the first adapter is maintained substantially constant, such as 5V, 9V, 12V or 20V.

The voltage output by the first adapter is not suitable for direct loading to both ends of the battery, but needs to be converted by a conversion circuit in a device to be charged (such as a terminal) to obtain a battery expected in the device to be charged (such as a terminal). Charging voltage and / or charging current. A conversion circuit is used to transform the voltage output by the first adapter to meet the demand for the charging voltage and/or charging current expected by the battery.

As an example, the conversion circuit may refer to a charge management module, such as a charging integrated circuit (IC). In the charging process of the battery, it is used to manage the charging voltage and/or charging current of the battery. The conversion circuit has the function of a voltage feedback module and/or has the function of a current feedback module to implement management of the charging voltage and/or charging current of the battery.

For example, the charging procedure of the battery may include one or a plurality of trickle charging phases, a constant current charging phase, and a constant voltage charging phase. In the trickle charge phase, the conversion circuit can utilize the current feedback loop such that the current entering the battery during the trickle charge phase meets the magnitude of the charge current expected by the battery (eg, the first charge current). In the constant current charging phase, the conversion circuit can utilize the current feedback loop such that the current entering the battery during the constant current charging phase satisfies the magnitude of the charging current expected by the battery (eg, the second charging current, which can be greater than the first charging current) . In the constant voltage charging phase, the conversion circuit can utilize the voltage feedback loop such that the voltage loaded across the battery during the constant voltage charging phase meets the expected charging voltage of the battery.

As an example, when the voltage output by the first adapter is greater than the charging voltage expected by the battery, the conversion circuit can be used to step down the voltage output by the first adapter, so that the charging voltage obtained after the step-down conversion meets the expected battery The charging voltage is required. As still another example, when the voltage output by the first adapter is less than the charging voltage expected by the battery, the conversion circuit may be configured to perform a voltage boosting process on the voltage output by the first adapter, so that the charging voltage obtained after the boosting conversion satisfies the battery Expected charging voltage requirements.

As another example, taking the first adapter outputting a constant voltage of 5V as an example, when the battery includes a single battery core (taking a lithium battery cell as an example, the charge cutoff voltage of a single cell is 4.2V), the conversion circuit (for example, Buck is lowered). The voltage circuit can perform a step-down process on the voltage outputted by the first adapter, so that the charging voltage obtained after the voltage reduction satisfies the charging voltage demand expected by the battery.

As another example, taking the first adapter outputting a constant voltage of 5V as an example, when the first adapter is a battery having two or more single cells connected in series (taking a lithium battery cell as an example, a charging cutoff voltage of a single cell) When charging 4.2V), a conversion circuit (such as a boost voltage boosting circuit) can boost the voltage outputted by the first adapter so that the charging voltage obtained after boosting satisfies the charging voltage demand expected by the battery.

The conversion circuit is limited by the low conversion efficiency of the circuit, so that the electric energy of the unconverted portion is dissipated as heat. This part of the heat will be focused inside the device to be charged (such as the terminal). The design space and heat dissipation space of the device to be charged (such as the terminal) are small (for example, the physical size of the mobile terminal used by the user is getting thinner and lighter, and a large number of electronic components are densely arranged in the mobile terminal to enhance the mobile terminal. Performance), which not only improves the design difficulty of the conversion circuit, but also causes the heat concentrated in the device to be charged (such as the terminal) to be difficult to remove in time, thereby causing an abnormality of the device to be charged (such as a terminal).

For example, the heat accumulated on the conversion circuit may cause thermal interference to the electronic components near the conversion circuit, causing abnormal operation of the electronic components. As another example, the heat accumulated on the conversion circuit may shorten the life of the conversion circuit and nearby electronic components. Another example is that the heat accumulated on the circuit may cause thermal interference to the battery, which may cause abnormal battery charging and discharging. Another example is the heat accumulated on the circuit, which may cause the temperature of the device to be charged (such as the terminal) to rise, affecting the user's experience in charging. For another example, the heat accumulated on the conversion circuit may cause a short circuit of the conversion circuit itself, so that the voltage outputted by the first adapter is directly loaded at both ends of the battery, causing charging abnormality. If the battery is in an overvoltage state for a long time, even Causes battery explosion, endangering user safety.

Embodiments of the present invention provide a second adapter whose output voltage is adjustable. The second adapter is capable of acquiring status information of the battery. The status information of the battery may include current battery information and/or voltage information of the battery. The second adapter can adjust the output voltage of the second adapter itself according to the acquired state information of the battery to meet the demand of the charging voltage and/or the charging current expected by the battery. Further, during the constant current charging phase of the battery charging program, the voltage output by the second adapter can be directly loaded at both ends of the battery to charge the battery.

The second adapter can have the function of a voltage feedback module and the function of the current feedback module to implement management of the charging voltage and/or charging current of the battery.

The second adapter adjusts the output voltage of the second adapter according to the acquired state information of the battery. The second adapter can obtain the status information of the battery in real time, and according to the instantaneous status information of the obtained battery. The voltage output by the second adapter itself is adjusted to meet the expected charging voltage and/or charging current of the battery.

The second adapter adjusts the output voltage of the second adapter according to the state information of the battery that is acquired immediately. The second adapter can obtain the current state of the battery at different times in the charging process as the battery voltage increases continuously during the charging process. Status information, and instantly adjust the output voltage of the second adapter itself according to the current state information of the battery to meet the demand of the battery's expected charging voltage and/or charging current.

For example, the charging procedure of the battery may include one or more of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase. During the trickle charge phase, the second adapter can utilize the current feedback loop such that the current output by the second adapter during the trickle charge phase and the current entering the battery meets the demand for the battery's expected charging current (eg, the first charging current). In the constant current charging phase, the second adapter can utilize the current feedback loop such that the current output by the second adapter during the constant current charging phase and the current entering the battery meets the demand for the charging current expected by the battery (eg, the second charging current, the second The charging current can be greater than the first charging current), and in the constant current charging phase, the second adapter can load the output charging voltage directly across the battery to charge the battery. During the constant voltage charging phase, the second adapter can utilize the voltage feedback loop such that the voltage output by the second adapter during the constant voltage charging phase meets the demand for the charging voltage expected by the battery.

For the trickle charging phase and the constant voltage charging phase, the voltage output by the second adapter may be processed in a manner similar to that of the first adapter, that is, through a conversion circuit in a device to be charged (eg, a terminal) to obtain a device to be charged (eg, The expected charging voltage and/or charging current of the battery within the terminal).

In order to improve the reliability and safety of the battery charging procedure, the embodiment of the present invention controls the second adapter to output a voltage/current having a pulsating waveform. The second adapter of the embodiment of the present invention will be described in detail below with reference to FIG.

Fig. 1 is a schematic structural view of a second adapter of an embodiment of the present invention. The second adapter 10 of FIG. 1 includes a power conversion unit 11, a sample holding unit 12, and a current collection control unit 13.

The power conversion unit 11 is configured to convert the input alternating current to obtain an output voltage and an output current of the second adapter 10. The output current of the second adapter 10 is the current of the first pulsation waveform.

The sample and hold unit 12 is connected to the power conversion unit 11. When the sample hold unit 12 is in the sampling state, the sample hold unit 12 is configured to sample the current of the first pulsation waveform. When the sample hold unit 12 is in the hold state, the sample hold unit 12 is used to hold (or lock) the peak value of the current of the first pulsation waveform.

The current collection control unit 13 is connected to the sample hold unit 12. The current collection control unit 13 is for determining whether the sample hold unit 12 is in the hold state, and collecting the peak value of the current of the first pulsation waveform held by the sample hold unit 12 in the case where it is determined that the sample hold unit 12 is in the hold state.

The output current of the second adapter of the embodiment of the present invention is a current of a pulsating waveform (or pulsating direct current), and the current of the pulsating waveform can reduce the lithium deposition phenomenon of the battery. In addition, the current of the pulsating waveform can reduce the probability and intensity of the arcing of the contacts of the charging interface and increase the life of the charging interface.

The second adapter generally adjusts the output current of the second adapter according to actual conditions. Taking the second adapter supporting the constant current mode as an example, the second adapter generally adjusts the output current of the second adapter based on the battery voltage of the device to be charged (such as the terminal) to charge the battery in the form of a piecewise constant current. Therefore, in the charging process, it is necessary to immediately detect and control the output current of the second adapter. If the current value of the output current of the second adapter is constant, the detection and control of the output current of the second adapter is relatively easy to implement. However, in the embodiment of the present invention, the output current of the second adapter is a current having a first pulsation waveform, and the amplitude of the current of the first pulsation waveform is fluctuating, and the detection and control manner of the output current of the special second adapter needs to be designed. .

In view of this, the embodiment of the present invention introduces the sample and hold unit 12 and the current collection control unit 13, and based on the sample and hold unit 12 and the current collection control unit 13, the peak value of the output current of the second adapter can be collected, thereby ensuring that the second adapter pair can be Effective control of the output current.

As indicated above, the output current of the second adapter is the current of the first pulsating waveform. The pulsation waveform herein may be a complete pulsation waveform, or may be a pulsation waveform obtained after peak shaving of a complete pulsation waveform. The so-called peak clipping process may refer to filtering out a portion of the pulsation waveform that exceeds a certain critical value, thereby achieving control of the peak value of the pulsation waveform. In the embodiment shown in Fig. 2A, the pulsation waveform is a complete pulsation waveform, and in the embodiment shown in Fig. 2B, the pulsation waveform is a pulsation waveform after the peak clipping process.

It should be understood that the manner in which the power conversion unit 11 exchanges the alternating current into the current of the first pulsation waveform is not specifically limited. For example, the primary filter unit and the secondary filter unit in the power conversion unit 11 can be removed to form a current of the first pulsation waveform. This not only enables the second adapter 10 to output the current of the first pulsation waveform, but also greatly reduces the volume of the second adapter 10, which facilitates miniaturization of the second adapter 10.

The device to be charged used in the embodiment of the present invention may be a “communication terminal” (or simply “terminal”), including but not limited to being configured to be connected via a wire line (eg, via a public switched telephone network). , PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks) (wireless local area network, WLAN), digital television network such as handheld digital video broadcasting (DVB-H) network, satellite network, amplitude modulation-frequency modulation (AM-FM) A device for receiving/transmitting a communication signal by a broadcast transmitter, and/or a wireless interface of another communication terminal. Communication terminals that are configured to communicate over a wireless interface may be referred to as "wireless communication terminals," "wireless terminals," and/or "mobile terminals." Examples of mobile terminals include, but are not limited to, satellite or cellular cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, faxing, and data communication capabilities; may include radio telephones, pagers, Internet/internet access, web browser, memo pad, calendar, and/or personal digital assistant (PDA) for global positioning system (GPS) receivers; and regular laptops And/or a palm-sized receiver or other electronic device including a radiotelephone transceiver.

In some embodiments, the second adapter 10 may include a charging interface (see the charging interface 191 of FIG. 19A). However, the type of the charging interface is not specifically limited in the embodiment of the present invention, for example, it may be a universal serial bus (Universal Serial). Bus, USB) interface, the USB interface can be a standard USB interface, a micro USB interface, or a Type-C interface. The implementation of the sample and hold unit 12 is not specifically limited in the embodiment of the present invention. Generally, the sample and hold unit 12 can implement sampling and holding of signals based on capacitance. The specific form of the sample holding unit 12 will be described in detail below with reference to FIG.

Alternatively, in some embodiments, as shown in FIG. 3, the sample and hold unit 12 may include a current sampling unit 14 and a current holding unit 15. The current sampling unit 14 is connected to the power conversion unit 11 for detecting the current of the first pulsation waveform, obtaining a sampling current, and converting the sampling current into a sampling voltage. The sampled voltage is used to indicate the magnitude of the current of the first pulsation waveform. The current holding unit 15 is connected to the current sampling unit 14 and the current collection control unit 13. The current holding unit 15 receives the sampling voltage from the current sampling unit 14, and charges the capacitance (not shown in FIG. 3) in the current holding unit 15 based on the sampling voltage. The current acquisition control unit 13 acquires the peak value of the current of the first pulsation waveform by collecting the voltage across the capacitance in the current acquisition control unit 13.

When the first pulsation waveform is at the rising edge, the capacitance in the current holding unit 15 rises as the current value of the current of the first pulsation waveform rises, and the sample holding unit 12 is in the sampling state. When the first pulsation waveform is at the peak or falling edge, the voltage across the capacitor in the current holding unit 15 remains unchanged, and the sample hold unit 12 is in the hold state.

The embodiment of the present invention collects the peak value of the current of the first pulsation waveform held by the sample holding unit 12 by the current acquisition control unit 13. In some embodiments, the current acquisition control unit 13 may include an Analog-to-Digital Converte (ADC), and the current acquisition control unit 13 may acquire a peak value of the current of the first pulsation waveform based on the ADC. In some embodiments, the current control unit 13 may further include a control unit, which may be, for example, a Microcontroller Unit (MCU). The control unit includes an ADC port, and the control unit can be connected to the capacitor in the sample and hold unit 12 through the ADC, and collect the peak value of the current of the first pulsation waveform by collecting the voltage across the capacitor.

When the sample-and-hold unit 12 is in the sampling state, the voltage across the capacitor increases as the current value of the current of the first pulsation waveform increases, which is equivalent to the charging procedure. When the sample and hold unit 12 is in the hold state, the voltage across the capacitor reaches a maximum value. The correspondence between the voltage across the capacitor and the current value of the first ripple waveform can be established in advance. In this way, the current acquisition control unit 13 can obtain the peak value of the current of the first pulsation waveform by collecting the voltage value across the capacitor.

Optionally, in some embodiments, the current collection control unit 13 is further configured to control the sample hold unit 12 to transition from the hold state to the sample state after acquiring the peak value of the current of the first pulsation waveform.

Specifically, the peak value of the current of the first pulsation waveform may be instantaneously changed, so that the peak value of the current of the first pulsation waveform needs to be continuously detected to ensure the immediacy and accuracy of the current information, thereby ensuring the entire charging procedure. Going smoothly. Based on this, the current collecting control unit 13 provided by the embodiment of the present invention can control the sampling and holding unit 12 to enter the sampling state after collecting the peak value of the current of the first pulsating waveform, and resample the current of the first pulsating waveform to ensure The immediacy and accuracy of current peak acquisition of the first pulsating waveform.

Further, in some embodiments, the current acquisition control unit 13 may complete the acquisition of a peak in each cycle of the first pulsation waveform, and immediately after the acquisition of the peak, control the sample-and-hold unit 12 to switch from the hold state to Sampling status. In this way, the peak value of the current of the first pulsation waveform collected by the current acquisition control unit 13 is updated in real time in units of the period of the first pulsation waveform, thereby ensuring the immediacy and accuracy of the current peak collection of the first pulsation waveform. As can be seen from the above, the output current of the second adapter 10, that is, the charging current is the current of the first pulsation waveform. The charging current can charge the battery in an intermittent manner, and the period of the charging current can follow the grid frequency change. In some embodiments, the frequency corresponding to the period of the charging current may be an integer multiple or a reciprocal of the grid frequency. In other words, the charging current can charge the battery in an intermittent manner. In some embodiments, the charging current can be comprised of one or a set of pulses that are synchronized with the grid.

It should be understood that the current collection control unit 13 can control the sampling and holding unit 12 to switch from the hold state to the acquisition state in various manners. For example, the current sampling unit 13 can control the discharge of the capacitor in the sample and hold unit 12 to clear the charge across the capacitor, so that When the next sampling period comes, the capacitance in the sample and hold unit 12 can be recharged.

Alternatively, in some embodiments, as shown in FIG. 4, the sample hold unit 12 may maintain the peak value of the current of the first pulsation waveform based on the capacitance in the sample hold unit 12 (not shown in FIG. 4). The current collection control unit 13 may include a discharge unit 16 and a control unit 17. The discharge cells 16 are connected to the capacitances in the control unit 17 and the sample and hold unit 12, respectively. The discharge unit 16 is for releasing the charge across the capacitance in the sample hold unit 12 under the control of the control unit 17, thereby causing the sample hold unit 12 to transition from the hold state to the sample state. Further, the acquisition of the peak value of the current of the first pulsation waveform held by the sample holding unit 12 can be completed by the control unit 17.

The discharge unit 16 can be implemented in a variety of ways. For example, discharge unit 16 may include a switch and a resistor in series with the capacitance in sample hold unit 12. When a discharge is required, the control unit 17 controls the switch to close so that the capacitor discharges the resistor, thereby consuming the charge across the capacitor.

The embodiment of the present invention does not specifically limit the manner in which the current collection control unit 13 determines whether the sample and hold unit 12 is in the hold state, and is described in detail below in conjunction with specific embodiments.

Optionally, in some embodiments, the current collection control unit 13 can immediately detect the current value sampled by the sample and hold unit 12, and if the current values obtained by the two consecutive tests remain unchanged, it indicates that the sample and hold unit 12 is in the hold state.

Optionally, in some embodiments, the current collection control unit 13 is configured to receive the synchronization signal, and determine whether the sample and hold unit 12 is in the hold state based on the synchronization signal. The period of the sync signal is 1/N of the period of the first pulsation waveform, and N is an integer greater than or equal to 1.

Since the current in the first pulsating form periodically changes, the time interval between the sampling state and the holding state of the sample holding unit 12 is related to the period of the current of the first pulsation waveform (the time interval may be the first pulsation waveform) 1/2 of the period of the current. Based on this, the embodiment of the present invention introduces a synchronization signal having a specific relationship with the period of the first pulsation waveform (ie, the period of the synchronization signal is 1/N of the period of the first pulsation waveform), and determines the sample and hold unit 12 based on the synchronization signal. Working status. For example, the relationship between the synchronization signal and the period and/or phase of the first pulsation waveform can be utilized to determine whether the first pulsation waveform is at a peak or a falling edge. If the first pulsation waveform is at the peak or falling edge, it is judged that the sample holding unit 12 is in the hold state. Determining whether the first pulsation waveform is at a peak or a falling edge herein means determining whether the first pulsation waveform is at a peak or a falling edge of the first pulsation waveform. Alternatively, determining whether the first pulsation waveform is at a peak or a falling edge determines whether the current output current of the second adapter is at a peak or a falling edge of the first pulsation waveform, or whether the current output current of the second adapter is The current of the peak or falling edge of the first pulsation waveform.

Optionally, as an implementation manner, the period of the first pulsation waveform is the same as the period of the synchronization signal. Further, in some embodiments, the first pulsation waveform can be in phase with the synchronization signal. In other words, if the sync signal is at the rising edge, the first pulsation waveform is at the rising edge, and if the sync signal is at the peak or falling edge, the first pulsation waveform is at the peak or falling edge. Since the first pulsation waveform is at the peak or falling edge, the sample hold unit 12 is in the hold state, and therefore, when it is judged when the sync signal is at the peak or the falling edge, it is judged when the sample hold unit 12 is in the hold state. In other embodiments, the phase of the first pulsation waveform may differ from the phase of the synchronization signal by a fixed value, such as 90 degrees out of phase, or 180 degrees out of phase. In this case, it is also possible to judge when the first pulsation waveform is at the peak or the falling edge based on the relationship between the period and the phase between the two, thereby judging when the sample holding unit 12 is in the hold state.

If the period of the synchronization signal is 1/2, 1/3, 1/4, etc. of the first pulsation waveform period, the operation state of the sample and hold unit 12 can also be performed based on the relationship between the phase and the period of the synchronization signal and the first pulsation waveform. Judge. As shown in Fig. 5, the waveform of the sync signal is indicated by a solid line, and the waveform of the first pulsation waveform is indicated by a broken line. The period of the synchronization signal is 1/2 of the first pulsation waveform period. When the synchronization signal is in the negative half cycle, the first pulsation waveform is at the peak or falling edge, and the sample hold unit 12 is in the hold state. Therefore, it is only necessary to judge when the waveform of the synchronous signal is in the negative half cycle to determine when the first pulsation waveform is at the peak or the falling edge. Other situations are similar, and are not enumerated here.

In addition, the synchronization signal may be a synchronization signal of a pulsating waveform, a synchronization signal of a triangular waveform, or another type of synchronization signal, which is not specifically limited in the embodiment of the present invention. In the embodiment of the present invention, the manner of acquiring the synchronization signal is not specifically limited. The following describes an optional acquisition manner of the synchronization signal according to the specific embodiment.

Optionally, in some embodiments, the current acquisition control unit 13 is connected to the power conversion unit 11 to acquire a synchronization signal from the power conversion unit 11.

It should be understood that the synchronization signal acquired from the power conversion unit 11 may be an AC signal received by the power conversion unit 11, a current/voltage signal obtained by the power conversion unit 11 after primary rectification, and a primary coupling of the power conversion unit 11 to the secondary. The current/voltage signal, the current/voltage signal after the secondary rectification, and the like are not specifically limited in the embodiment of the present invention.

Alternatively, in some embodiments, as shown in FIG. 6, power conversion unit 11 may include primary unit 18 and secondary unit 19. The current collection control unit 13 is connected to the secondary unit 19 to acquire a synchronization signal from the secondary unit 19.

It should be understood that there are various ways to obtain synchronization signals from the secondary unit 19. For example, the synchronization signal can be obtained directly from the bus (VBUS) of the secondary unit 19. Specifically, since the second adapter 10 outputs the current of the first pulsating waveform, and the output of the second adapter 10 is connected to the busbar of the secondary unit 19, the busbar of the secondary unit 19 should also have the first pulsation. The current of the waveform can be directly obtained from the bus of the secondary unit 19. As another example, as shown in FIG. 7, the secondary unit 19 may include a first rectifying unit 20. The first rectifying unit 20 is connected to the current collecting control unit 13. The first rectifying unit 20 is configured to rectify the current coupled to the secondary unit 19 by the primary unit 18 to obtain a voltage in the second pulsating form, and send the voltage of the second pulsating waveform as a synchronization signal to the current collecting control unit 13.

The secondary unit 19 itself contains a secondary rectifying unit. The secondary rectifying unit and the first rectifying unit 20 described above may be two independent rectifying units. The secondary rectifying unit is configured to rectify the current coupled to the secondary to obtain the output current of the second adapter. The first rectifying unit is configured to rectify the current coupled to the secondary to obtain a synchronization signal. Referring to Fig. 21, the unit shown by reference numeral 39 in Fig. 21 is a secondary rectifying unit. Both the secondary rectifying unit 39 and the first rectifying unit 20 can be located on the side of the secondary winding close to the transformer T1, thereby rectifying the current from the primary coupling to the secondary of the second adapter.

Alternatively, in some embodiments, as shown in FIG. 8, the power conversion unit 11 may include a primary unit 18 and a secondary unit 19. The current acquisition control unit 13 is connected to the primary unit 18 to acquire a synchronization signal from the primary unit 18.

It should be understood that there are many ways to obtain synchronization signals from the primary unit 18. For example, the AC signal can be obtained directly from the primary unit 18 and sent to the current acquisition control unit 13 as a synchronization signal. For another example, the pulsating DC signal obtained by rectifying the rectifier circuit in the primary unit 18 can be sent to the current collecting control unit 13 as a synchronization signal.

Specifically, as shown in Fig. 9, the primary unit 18 rectifies the alternating current AC to obtain the voltage of the third pulsation waveform. The third pulsation waveform is the same as the first pulsation waveform period. The primary unit 18 can couple the voltage of the third pulsation waveform from the primary to the secondary of the second adapter 10 through the optocoupler unit 21 to obtain the voltage of the fourth pulsation waveform, and send the voltage of the fourth pulsation waveform as a synchronization signal to the synchronization signal. Current acquisition control unit 13. The optocoupler unit 21 can function to isolate mutual interference between the primary and secondary. As an alternative, the primary unit 18 can also directly transmit the voltage of the third pulsation waveform to the current collection control unit 13 without passing through the optocoupler unit 21, which is not specifically limited in the embodiment of the present invention.

The manner of obtaining the synchronization signal from the power conversion unit 11 is described in detail above with reference to the specific embodiment. However, the manner of acquiring the synchronization signal is not limited thereto. Other acquisition methods of the synchronization signal are given below.

Alternatively, in some embodiments, the current acquisition control unit 13 may acquire the synchronization signal from the sample and hold unit 12.

Specifically, the sampling and holding unit 12 samples the output current of the second adapter, that is, the current of the first pulsation waveform, to obtain a sampling current, and the sampling current obtained by the sampling and holding unit 12, or the sampling voltage corresponding to the sampling current, etc. The current period and phase are the same as those of the first pulsation waveform. The sampling current or the sampling voltage is used as the synchronization signal to simplify the determination logic of the operation state of the sample holding unit 12.

In general, the sample hold unit 12 samples the current of the first pulsation waveform to obtain a sampling current, and converts the sampling current into a sampling voltage. The sampled voltage can be used to indicate the magnitude of the current of the first pulsating waveform. The sample and hold unit 12 can transmit the sampled voltage as a synchronization signal to the current collection control unit 13. For example, referring to Fig. 21, the voltage signal output from the output 埠 (OUTPUT) of the galvanometer of Fig. 21 can be used as the synchronization signal.

The above mainly describes the manner of acquiring the synchronization signal. Hereinafter, the manner of determining whether the first pulsation waveform is at the peak or the falling edge based on the synchronization signal is described in detail with reference to the specific embodiment.

Optionally, in some embodiments, the current collection control unit 13 determines whether the first pulsation waveform is at a peak or a falling edge based on the synchronization signal, and collects sampling when it is determined that the first pulsation waveform is at a peak or a falling edge. The peak value of the current of the first pulsation waveform held by the unit 12 is maintained.

Specifically, the sample hold unit 12 can switch between the sampling state and the hold state based on the charge and discharge of the capacitor. When the first pulsation waveform is at the rising edge, the capacitance in the sample-and-hold unit 12 is in a state of charge, and the voltage across the capacitor increases in accordance with the increase in the current of the first pulsation waveform, at which time the sample-and-hold unit 12 is in the sampling state. When the first pulsation waveform is at the peak or falling edge, the voltage across the capacitor no longer continues to increase, at which time the sample hold unit 12 is in the hold state. Therefore, it is judged when the sample holding unit 12 is in the hold state by judging when the first pulsation waveform is at the peak or the falling edge. Since the period and phase of the synchronization signal are in a fixed relationship with the period and phase of the first pulsation waveform, it is possible to determine whether the first pulsation waveform is at a peak or a falling edge based on the period and/or phase of the synchronization signal. For example, when the sync signal is in phase with the first pulsation waveform, the first pulsation waveform is at the peak or falling edge when the sync signal is at the peak or falling edge. For another example, the synchronization signal is the same as the first pulsation waveform period, and the phase is different by half a period. When the synchronization signal is at the rising edge, the first pulsation waveform is also at the peak or the falling edge.

There are many ways to detect the phase of the sync signal. For example, the current or voltage of the synchronous signal can be detected instantaneously by an ammeter or a voltmeter to determine the phase of the synchronous signal, thereby determining whether the first pulsation waveform is at a peak or a falling edge. However, this implementation requires an additional current-voltage detection circuit, which is complicated to implement. Two comparator-based implementations are presented below that compare the voltage of the sync signal with the reference voltage to easily determine if the first ripple waveform is at the peak or falling edge.

Alternatively, in some embodiments, as shown in FIG. 10, the current acquisition control unit 13 may include a comparator 22 and a control unit 23. The first input of the comparator 22 is for receiving a synchronization signal, and the second input of the comparator 22 is for receiving a reference voltage. The control unit 23 is connected to the output of the comparator 22, and determines whether the first pulsation waveform is at a peak or a falling edge based on a comparison result of the voltage of the synchronization signal and the reference voltage. In some embodiments, the first input is a non-inverting input of the comparator and the second input is an inverting input of the comparator. In other embodiments, the first input is the inverting input of the comparator and the second input is the non-inverting input of the comparator.

It should be understood that the method for selecting the voltage value of the reference voltage is not specifically limited in the embodiment of the present invention. Taking the pulsation waveform signal whose synchronization signal is a zero-crossing point as an example, the voltage value of the reference voltage may be selected to be greater than 0 and smaller than the peak value of the synchronization signal. a certain voltage value. For example, the synchronous signal is an alternating current signal, and the voltage value of the reference voltage can be selected as 0.

In addition, in the embodiment of the present invention, the manner of determining whether the first pulsation waveform is at a peak or a falling edge is not specifically limited by comparing the voltage of the synchronous signal and the reference voltage, and the period and phase of the synchronization signal and the first pulsation waveform. The period is related to the phase. The following is a description of the manner in which the peak or falling edge of the first pulsation waveform is judged by taking the same period of the synchronization signal and the first pulsation waveform as an example in conjunction with FIG. 11 and FIG. In the embodiments of Figs. 11 and 12, the current acquisition control unit 13 acquires the peak value of the current of the first pulsation waveform held by the sample holding unit in each cycle of the first pulsation waveform. After the acquisition is completed, the current acquisition control unit 13 immediately supplies a control voltage to the MOS transistor in the discharge cell, controls the MOS transistor in the discharge cell to be turned on, and discharges the charge across the capacitor in the sample and hold unit 12. However, the 11th and 12th drawings are merely illustrative, and the embodiment of the present invention is not limited thereto. For example, the current acquisition control unit 13 may acquire the peak value of the current of the first pulsation waveform once every plural period. In addition, the discharge unit can also adopt other implementations than the MOS transistor, such as using other types of switching elements to achieve the conduction and turn-off of the discharge cells.

In the embodiment of Fig. 11, the synchronization signal and the first pulsation waveform (the first pulsation waveform is a pulsation waveform after the peak clipping process) are in phase. As can be seen from Fig. 11, since the sync signal and the first pulsation waveform are in phase, the first pulsation waveform is also at the peak or falling edge when the sync signal is at the peak or falling edge. Therefore, as long as it is judged when the synchronization signal is at the peak or falling edge of the waveform of the synchronization signal, it can be known when the first pulsation waveform is at the peak or the falling edge.

Further, in order to determine when the sync signal is at a peak or a falling edge, the embodiment of Fig. 11 introduces a comparator. The comparator compares the voltage values of the synchronous signal and the reference voltage to obtain a curve of the output potential of the comparator, that is, a rectangular wave as shown in FIG. It can be seen from the rectangular wave that the first pulsation waveform is at the falling edge when the output potential of the comparator is switched from the high potential to the low potential (hereinafter referred to as the target time). At this time, the capacitance in the sample holding unit 12 is in the hold state. Therefore, in the embodiment of the present invention, the target time is taken as the peak sampling point, and the control current collecting control unit 13 collects the voltage across the capacitor in the sample holding unit 12, thereby obtaining the peak value of the current of the first pulsation waveform, and collecting the first pulsation. Immediately after the peak of the waveform current, the MOS transistor in the discharge cell is turned on, releasing the charge across the capacitor in the sample and hold unit 12 to prepare for the acquisition of the next cycle.

In the embodiment of Fig. 12, the phases of the synchronization signal and the first pulsation waveform are 180° out of phase, and the first pulsation waveform is a pulsation waveform after the peak clipping process. As can be seen from Fig. 12, since the phase of the sync signal and the first pulsation waveform are 180° out of phase, when the sync signal is at the peak or rising edge, the first pulsation waveform is at the peak or falling edge. Therefore, as long as it is judged when the sync signal is at the peak or rising edge, it can be known when the first pulsation waveform is at the peak or the falling edge.

Further, in order to determine when the sync signal is at a peak or a rising edge, the embodiment of Fig. 12 introduces a comparator. The comparator compares the voltage values of the synchronous signal and the reference voltage to obtain a curve of the output potential of the comparator, that is, the rectangular wave shown in FIG. It can be seen from the rectangular wave that the first pulsation waveform is at the falling edge when the output potential of the comparator is switched from the low potential to the high potential (hereinafter referred to as the target time). At this time, the capacitance in the sample holding unit 12 is in the hold state. Therefore, in the embodiment of the present invention, the target time is taken as the peak sampling point, and the control current collecting control unit 13 collects the voltage across the capacitor in the sample holding unit 12, thereby obtaining the peak value of the current of the first pulsation waveform, and collecting the first pulsation. Immediately after the peak of the waveform current, the MOS transistor in the discharge cell is turned on, releasing the charge across the capacitor in the sample and hold unit 12 to prepare for the acquisition of the next cycle.

Alternatively, in other embodiments, as shown in FIG. 13, the current acquisition control unit 13 may include a comparison unit 24 and a control unit 25. Comparison unit 24 can include a capacitor 26 and a comparator 27. The capacitor 26 is configured to receive the synchronization signal and filter the DC signal in the synchronization signal to obtain an AC signal of the zero crossing point. The first input of comparator 27 is coupled to capacitor 26 for receiving an AC signal. The second input of comparator 27 is for receiving a reference voltage. The comparator 27 is for comparing the voltage of the alternating signal with the reference voltage. The control unit 25 is connected to the output of the comparator 27, and determines whether the first pulsation waveform is at a peak or a falling edge based on a comparison result of the voltage of the alternating current signal and the reference voltage. Further, in the embodiment of the present invention, the voltage value of the reference voltage may be set to zero. In some embodiments, the first input is a non-inverting input of the comparator and the second input is an inverting input of the comparator. In other embodiments, the first input is the inverting input of the comparator and the second input is the non-inverting input of the comparator.

For example, if the synchronous signal is a pulsating waveform signal, the pulsating waveform signal can be regarded as a signal obtained by mixing a direct current signal (or a direct current component) and a zero-crossing alternating current signal (or an alternating current component). The capacitor 26 can filter out the DC signal in the pulsating waveform signal, leaving the AC signal of the zero crossing. In this implementation, the phase of the sync signal can be conveniently determined by setting the reference voltage of comparator 27 to zero (e.g., grounding the second input of the comparator).

Further, in the embodiment of the present invention, determining whether the first pulsation waveform is at a peak or a falling edge based on the alternating signal and the reference voltage determination synchronization signal is different from the period and phase of the alternating signal and the period of the first pulsation waveform. It is related to the phase. The specific judgment method is similar to the judgment method described in Fig. 11 and Fig. 12, and will not be described in detail here.

The manner in which the current peak of the first pulsation waveform is acquired is described in detail above. Hereinafter, the control method of the charging program based on the current peak value of the acquired first pulsation waveform will be described in detail with reference to a specific embodiment.

Optionally, in some embodiments, as shown in FIG. 14, the second adapter 10 may further include a voltage adjustment unit 28. The voltage adjustment unit 28 is connected to the power conversion unit 11 for detecting and adjusting the output voltage of the second adapter 10. The current acquisition control unit 13 is connected to the voltage adjustment unit 28, and the voltage adjustment unit 28 adjusts the peak value of the current of the first pulsation waveform.

It should be understood that the most basic function of the voltage adjustment unit 28 is to achieve an adjustment of the output voltage of the second adapter. Specifically, the voltage adjustment unit 28 can detect the output voltage of the second adapter 10 through the power conversion unit 11 and adjust the output voltage of the second adapter 10 through the power conversion unit 11. In other words, the voltage adjustment unit 28 and the power conversion unit 11 form a feedback control system for the output voltage of the second adapter, which may also be referred to as a voltage feedback loop. It should be understood that in the case where the output power of the second adapter is constant, the adjustment of the voltage also causes a change in the current. Therefore, after collecting the peak value of the current of the first pulsation waveform, the current acquisition control unit 13 of the embodiment of the present invention can implement current adjustment by using the voltage feedback loop. For example, after collecting the current peak value of the current of the first pulsation waveform, if the current peak value is desired to be adjusted to the target peak value, the peak value of the current of the first pulsation waveform can be adjusted to the target peak value by software calculation. At this time, the target value of the output voltage of the corresponding second adapter 10 is then adjusted to the target value by the voltage feedback loop described above.

In the embodiment of the present invention, the current collecting control unit 13 and the voltage feedback loop form a feedback control system for the peak value of the output current of the second adapter. This feedback control system can also be referred to as a current feedback loop. That is, the embodiment of the present invention includes both a voltage feedback loop (implemented by hardware) and a current feedback loop (based on a voltage feedback loop, implemented by software calculation), so that the second adapter can achieve the output voltage of the second adapter. The control can also realize the control of the output current of the second adapter, enrich the function of the second adapter, and improve the wisdom of the second adapter.

There are various ways in which the current collecting control unit 13 adjusts the peak value of the current of the first pulsation waveform by the voltage adjusting unit 28, which will be exemplified below with reference to FIGS. 15 and 17.

Alternatively, in some embodiments, as shown in FIG. 15, the voltage adjustment unit 28 may include a voltage sampling unit 29, a voltage comparison unit 30, and a voltage control unit 31. The voltage sampling unit 29 is connected to the power conversion unit 11 for sampling the output voltage of the second adapter 10 to obtain a first voltage. The input of the voltage comparison unit 30 is connected to the voltage sampling unit 29 for comparing the first voltage with the first reference voltage. The input of voltage control unit 31 is coupled to the output of voltage comparison unit 30. The output of the voltage control unit 31 is connected to the power conversion unit 11. The voltage control unit 31 controls the output voltage of the second adapter 10 based on the comparison result of the first voltage and the first reference voltage. The current acquisition control unit 13 is connected to the voltage comparison unit 30, and adjusts the peak value of the current of the first pulsation waveform by adjusting the voltage value of the first reference voltage.

Specifically, the input of the voltage sampling unit 29 can be connected to the bus bar (VBUS) of the second adapter to collect the output voltage of the second adapter. In some embodiments, voltage sampling unit 29 can be a wire. In this way, the first voltage sampled by the voltage sampling unit 29 is the output voltage of the second adapter. In other embodiments, voltage sampling unit 29 may include two resistors for voltage division. In this way, the first voltage sampled by the voltage sampling unit 29 is the voltage obtained after the two resistors are divided. The voltage comparison unit 30 can be implemented by an op amp. One input of the operational amplifier is for receiving the first voltage input by the voltage sampling unit 29, and the other input is for receiving the first reference voltage. The output of the operational amplifier generates a voltage feedback signal to indicate whether the first voltage and the first reference voltage are equal. The voltage control unit 31 can be implemented based on a device such as an optocoupler and a PWM controller, and adjusts the output voltage of the second adapter based on the voltage feedback signal provided by the voltage comparison unit 30. In the case where the output power of the second adapter is constant, the current acquisition control unit 13 may calculate the expected value of the output voltage of the corresponding second adapter based on the expected value of the peak value of the current of the first pulsation waveform. Then, adjusting the output voltage of the second adapter to a desired value of the output voltage of the second adapter by adjusting the voltage value of the first reference voltage, thereby adjusting the peak value of the current of the first pulsation waveform to the current of the first pulsation waveform The expected value of the peak.

The current acquisition control unit 13 can adjust the voltage value of the first reference voltage in a plurality of ways. Optionally, as an embodiment, as shown in FIG. 16, the current collection control unit 13 may include a control unit 32 and a digital to analog converter (DAC) 33. The input of DAC 33 is coupled to control unit 32, and the output of DAC 33 is coupled to voltage comparison unit 30. The control unit 32 adjusts the voltage value of the first reference voltage through the DAC 33 to adjust the peak value of the current of the first pulsation waveform. Optionally, as another embodiment, the control unit 32 can also implement the adjustment of the voltage value of the first reference voltage by using an RC unit, a digital potentiometer, or the like, which is not specifically limited in this embodiment of the present invention.

Alternatively, in some embodiments, as shown in FIG. 17, the voltage adjustment unit 28 may include a voltage dividing unit 34, a voltage comparison unit 30, and a voltage control unit 31. The input end of the voltage dividing unit 34 is connected to the power conversion unit 11 for dividing the output voltage of the second adapter 10 according to the set voltage dividing ratio to generate a second voltage. The input of the voltage comparison unit 30 is connected to the output of the voltage dividing unit 34 for comparing the second voltage with the second reference voltage. The input of voltage control unit 31 is coupled to the input of voltage comparison unit 30. The output of the voltage control unit 31 is connected to the power conversion unit 11. The voltage control unit 31 controls the output voltage of the second adapter 10 based on the comparison result of the second voltage and the second reference voltage. The current acquisition control unit 13 is connected to the voltage comparison unit 30, and adjusts the voltage division ratio to adjust the peak value of the current of the first pulsation waveform.

The embodiment of the present invention is similar to the embodiment of Fig. 15, except that the embodiment of the present invention introduces a voltage dividing unit. The partial pressure ratio of the voltage dividing unit is adjustable. Further, the current collection control unit 13 in the embodiment of the present invention does not adjust the peak value of the current of the first pulsation waveform by adjusting the reference voltage of the voltage comparison unit 30, but adjusts the voltage division ratio of the voltage dividing unit 34. The peak value of the current of a pulsating waveform is adjusted. The embodiment of the invention realizes the sampling of the output voltage of the second adapter based on the voltage dividing unit, and realizes the adjustment of the peak value of the current of the first pulsating waveform, which simplifies the circuit structure of the second adapter.

It should be understood that the embodiment of the present invention achieves adjustment of the peak value of the current of the first pulsation waveform by adjusting the voltage division ratio of the voltage dividing unit. Therefore, the reference voltage of the voltage comparison unit in the embodiment of the present invention (ie, the second reference voltage in the above) may be a fixed value.

There are various implementations of the voltage dividing unit 34 of the embodiment of the present invention. For example, it can be realized by a digital potentiometer, or the functions of the above partial pressure and voltage division ratio adjustment can be realized by discrete resistors, switches and the like.

Taking the implementation of the digital potentiometer as an example, as shown in FIG. 18, the current collecting control unit 13 includes a control unit 32, and the voltage dividing unit 34 includes a digital potentiometer 35. The high potential end of the digital potentiometer 35 is connected to the power conversion unit 11. The low potential end of the digital potentiometer 35 is connected to the ground. The output of the digital potentiometer 35 is connected to a voltage comparison unit 30. The control unit 32 is connected to the control terminal of the digital potentiometer 35, and the voltage dividing ratio of the digital potentiometer 35 is adjusted by the control terminal of the digital potentiometer 35 to adjust the peak value of the current of the first pulsation waveform.

Alternatively, in some embodiments, the second adapter 10 can support the first charging mode and the second charging mode. The second adapter 10 charges the charging device (such as the terminal) in the second charging mode faster than the charging speed of the charging device (such as the terminal) in the first charging mode of the second adapter 10 (the current of the first pulsating waveform) It may be the output current of the second adapter in the second charging mode). In other words, compared to the second adapter 10 operating in the first charging mode, the second adapter 10 operating in the second charging mode is filled with the battery in the same capacity of the device to be charged (such as the terminal). It is shorter.

The second adapter 10 includes a control unit. In the program in which the second adapter 10 is connected to a device to be charged (such as a terminal), the control unit performs bidirectional communication with the device to be charged (such as a terminal) to control the charging procedure of the second charging mode. The control unit may be the control unit in any of the above embodiments, such as a control unit in the first adjustment unit or a control unit in the second adjustment unit.

The first charging mode may be a normal charging mode, and the second charging mode may be a fast charging mode. The normal charging mode means that the second adapter outputs a relatively small current value (typically less than 2.5 A) or a relatively small power (typically less than 15 W) to charge the battery in the charging device (eg, the terminal). In charging mode, it is usually necessary to fully charge a large capacity battery (such as a 3000 mAh battery), which usually takes several hours; in the fast charging mode, the second adapter can output a relatively large current ( Usually greater than 2.5A, such as 4.5A, 5A or higher) or charging the battery in a charging device (such as a terminal) with relatively large power (usually greater than or equal to 15W), compared to the normal charging mode. The charging time required for the second adapter to fully charge the same capacity battery in the fast charging mode can be significantly shortened and the charging speed is faster.

The embodiment of the present invention does not specifically limit the communication content of the control unit of the second adapter and the device to be charged (such as the terminal), and the control mode of the output of the second adapter in the second charging mode. For example, the control unit may Communicate with a device to be charged (such as a terminal), interact with the current voltage or current power of the battery in the device to be charged (such as a terminal), and adjust the output voltage or output current of the second adapter based on the current voltage or current power of the battery. The communication content between the control unit and the device to be charged (such as the terminal) and the control mode of the control unit for the output of the second adapter in the second charging mode will be described in detail below in conjunction with a specific embodiment.

Optionally, in some embodiments, the program that the control unit performs bidirectional communication with the device to be charged (eg, the terminal) to control the output of the second adapter in the second charging mode may include: the control unit and the device to be charged ( For example, the terminal performs two-way communication to negotiate a charging mode between the second adapter and a device to be charged (such as a terminal).

In the embodiment of the present invention, the second adapter does not blindly use the second charging mode to quickly charge the charging device (such as the terminal), but performs two-way communication with the device to be charged (such as the terminal), and negotiates whether the second adapter can adopt the first The second charging mode performs fast charging on a charging device (such as a terminal), which can improve the safety of the charging program.

Specifically, the two-way communication between the control unit and the device to be charged (such as the terminal) to negotiate the charging mode between the second adapter and the device to be charged (such as the terminal) may include: the control unit sends the first to the device to be charged (such as the terminal) An instruction for inquiring whether a device to be charged (such as a terminal) turns on a second charging mode; the control unit receives a reply command sent by the device to be charged (such as a terminal) for the first instruction, and the reply instruction is used to indicate that Whether the charging device (such as the terminal) agrees to turn on the second charging mode; in the case that the device to be charged (such as the terminal) agrees to turn on the second charging mode, the control unit uses the second charging mode to charge the device to be charged (such as the terminal). The above description of the embodiments of the present invention does not limit the master-slave of the second adapter (or the control unit of the second adapter) and the device to be charged (such as the terminal), in other words, the control unit and the device to be charged (eg, Any one of the terminals may initiate a two-way communication session as the master device, and accordingly the other party may make a first response or a first reply as the slave device initiates communication to the master device. As a possible way, the identity of the master and slave devices can be confirmed in the communication program by comparing the potential level of the potential of the second adapter side and the device to be charged (such as the terminal) relative to the ground.

The embodiment of the present invention does not limit the specific implementation of the two-way communication between the second adapter (or the control unit of the second adapter) and the device to be charged (such as the terminal), that is, the second adapter (or the second adapter) The control unit) initiates a communication session with any one of the devices to be charged (eg, the terminal) as the master device, and accordingly the other party acts as the first response or the first reply to the communication session initiated by the slave device to the master device side, and simultaneously The master device can make a second response to the first response or the first reply of the slave device, and can conclude that the master and slave devices complete the negotiation procedure of one charging mode. As a feasible implementation manner, after the negotiation between the master and slave devices is completed, the charging operation between the master and slave devices can be performed to ensure the safe and reliable charging procedure after the negotiation. carried out.

One way that the master device can make a second response according to the slave device's first response or first reply to the communication session may be that the master device can receive the slave device's first response to the communication session. A response or a first reply, and making a targeted second response based on the received first response or first reply of the slave device. For example, when the master device receives the first response or the first reply of the slave device for the communication session within a preset time, the master device may make a response to the first response or the first response of the slave device. The second response is specifically: the master device and the slave device complete the negotiation of the charging mode, and the charging operation is performed between the master device and the slave device according to the negotiation result according to the first charging mode or the second charging mode, that is, The second adapter operates to charge the device to be charged (eg, the terminal) in the first charging mode or the second charging mode according to the negotiation result.

As a way for the master device to make a further second response according to the first response or the first reply of the slave device for the communication session, the master device may not receive the slave device within a preset time. For the first response or the first reply of the communication session, the master device also makes a targeted second response to the first response or the first reply of the slave device. For example, when the master device does not receive the first response or the first reply of the slave device for the communication session within a preset time, the master device also performs the first response or the first reply to the slave device. The targeted second response is specifically: the master device side and the slave device side complete the negotiation of one charging mode, and the charging operation is performed between the master device side and the slave device side according to the first charging mode, that is, the second adapter works in the first Charging a device to be charged (such as a terminal) in a charging mode.

Optionally, in some embodiments, when a device to be charged (such as a terminal) initiates a communication session as a master device, the second adapter (or the control unit of the second adapter) acts as a communication session initiated by the slave device to the master device side. After the first response or the first reply, there is no need for the charging device (such as the terminal) to make a targeted second response to the first response or the first response of the second adapter, and the second adapter (or the second adapter) can be considered. The control unit) completes a negotiation procedure of the charging mode with the device to be charged (such as the terminal), and the second adapter can determine, according to the negotiation result, the device to be charged (such as the terminal) in the first charging mode or the second charging mode. Charge it.

Optionally, in some embodiments, the program for bidirectional communication between the control unit and the device to be charged (eg, the terminal) to control the output of the second adapter in the second charging mode may include: the control unit and the device to be charged (eg, The terminal performs bidirectional communication to determine a charging voltage for charging the device to be charged (such as a terminal) output by the second adapter in the second charging mode; and the control unit adjusts the output voltage of the second adapter to make the second The output voltage of the adapter is equal to the charging voltage output by the second adapter in the second charging mode for charging the device to be charged, such as a terminal.

Specifically, the control unit performs bidirectional communication with the device to be charged (eg, the terminal) to determine that the charging voltage for charging the device to be charged (eg, the terminal) output by the second adapter in the second charging mode may include: the control unit Sending a second instruction to the device to be charged (such as a terminal) for inquiring whether the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (such as the terminal); the control unit receiving the device to be charged (such as the terminal) And the reply instruction of the second instruction is used to indicate that the output voltage of the second adapter matches the current voltage of the battery, and is higher or lower. Alternatively, the second instruction may be used to query whether the current output voltage of the second adapter is suitable as the charging voltage for charging the device to be charged (eg, the terminal) as the second adapter output in the second charging mode, second The command's reply command can be used to indicate that the current second adapter's output voltage is appropriate, high or low. The current output voltage of the second adapter matches the current voltage of the battery, or the current output voltage of the second adapter is suitable as the charging voltage for charging the device to be charged (eg, the terminal) as the second adapter output in the second charging mode It can be said that the current output voltage of the second adapter is slightly higher than the current voltage of the battery, and the difference between the output voltage of the second adapter and the current voltage of the battery is within a preset range (usually on the order of several hundred millivolts) .

Optionally, in some embodiments, the charging unit that performs bidirectional communication with the device to be charged (eg, the terminal) to control the output of the second adapter in the second charging mode may include: the control unit and the device to be charged ( Performing bidirectional communication, such as terminal, to determine a charging current output by the second adapter in the second charging mode for charging the charging device (eg, the terminal); and the control unit adjusting the peak value of the current of the first pulsating waveform, The peak value of the current of the first pulsation waveform is equal to the charging current for charging the device to be charged output by the second adapter in the second charging mode.

Specifically, the control unit performs bidirectional communication with the device to be charged (eg, the terminal) to determine that the charging current for charging the device to be charged (eg, the terminal) output by the second adapter in the second charging mode may include: the control unit Sending a third command to the device to be charged (such as a terminal), the third command is used to query the maximum charging current currently supported by the device to be charged (such as the terminal); and the control unit receives the response of the third command sent by the device to be charged (such as the terminal) The command, the reply command of the third command is used to indicate the maximum charging current currently supported by the device to be charged (such as the terminal); and the control unit determines the second charging mode according to the maximum charging current currently supported by the device to be charged (such as the terminal). The charging current output by the second adapter for charging a charging device such as a terminal. It should be understood that the control unit determines, according to the maximum charging current currently supported by the device to be charged (such as the terminal), the charging current for charging the device to be charged (such as the terminal) output by the second adapter in the second charging mode. For example, the second adapter may determine the maximum charging current currently supported by the device to be charged (eg, the terminal) as the charging current for charging the device to be charged (eg, the terminal) output by the second adapter in the second charging mode, It is also possible to determine the maximum charging current currently supported by the device to be charged (such as the terminal) and the current output capability of the device, and determine the output of the second adapter in the second charging mode for the device to be charged (eg, the terminal). Charging current.

Optionally, in some embodiments, the program that the control unit performs bidirectional communication with the device to be charged (eg, the terminal) to control the output of the second adapter in the second charging mode may include: using the second in the second adapter In the charging mode for charging a device to be charged (such as a terminal), the control unit performs bidirectional communication with the device to be charged (such as a terminal) to adjust the peak value of the current of the first pulsation waveform.

Specifically, the two-way communication between the control unit and the device to be charged (such as the terminal) to adjust the peak value of the current of the first pulsation waveform may include: the control unit sends a fourth instruction to the device to be charged (such as the terminal), and the fourth instruction is used for Inquiring about the current voltage of the battery of the device to be charged (such as the terminal); the control unit receives the reply command of the fourth command sent by the second adapter, the reply command of the fourth command is used to indicate the current voltage of the battery; and the control unit is based on the current voltage of the battery , adjusting the peak value of the current of the first pulsation waveform.

Optionally, in some embodiments, as shown in FIG. 19A, the second adapter 10 includes a charging interface 191. Further, in some embodiments, the control unit (such as the MCU in FIG. 21) in the second adapter 10 can communicate bidirectionally with the device to be charged (such as a terminal) through the data line 192 in the charging interface 191.

Optionally, in some embodiments, the program for bidirectional communication between the control unit and the device to be charged (eg, the terminal) to control the output of the second adapter in the second charging mode may include: the control unit and the device to be charged (eg, The terminal) performs two-way communication to determine whether the charging interface is in poor contact. Specifically, the two-way communication between the control unit and the device to be charged (such as the terminal) to determine whether the charging interface is in poor contact may include: the control unit sends a fourth command to the device to be charged (such as the terminal), and the fourth command is used to query the charging to be charged. The current voltage of the battery of the device (such as the terminal); the control unit receives the reply command of the fourth command sent by the device to be charged (such as the terminal), and the reply command of the fourth command is used to indicate the current battery of the device to be charged (such as the terminal) Voltage; the control unit determines whether the charging interface is in poor contact according to the output voltage of the second adapter and the current voltage of the battery of the device to be charged (eg, the terminal). For example, the control unit determines that the voltage difference between the output voltage of the second adapter and the current voltage of the device to be charged (eg, the terminal) is greater than a preset voltage threshold, indicating that the voltage difference is divided by the current current value output by the second adapter. The obtained impedance is greater than the preset impedance threshold to determine the poor contact of the charging interface.

Optionally, in some embodiments, the charging interface contact failure may also be determined by a device to be charged (such as a terminal): the device to be charged (such as a terminal) sends a sixth command to the control unit, and the sixth command is used to query the second adapter. The output voltage; the device to be charged (such as a terminal) receives the reply command of the sixth command sent by the control unit, the reply command of the sixth command is used to indicate the output voltage of the second adapter; the device to be charged (such as the terminal) according to the device to be charged (such as the terminal) the current voltage of the battery and the output voltage of the second adapter to determine whether the charging interface is in poor contact. After the charging device (such as the terminal) determines that the charging interface is in poor contact, the device to be charged (such as the terminal) sends a fifth command to the control unit, and the fifth command is used to indicate that the charging interface is in poor contact. After receiving the fifth instruction, the control unit may control the second adapter to exit the second charging mode.

The communication procedure between the control unit in the second adapter and the device to be charged (e.g., terminal) will be described in more detail below in conjunction with FIG. 19B. It should be noted that the example of FIG. 19B is merely for the purpose of facilitating the understanding of the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to the specific numerical values or specific examples illustrated. A person skilled in the art will be able to make various modifications or changes in the form of the embodiment of FIG. 19B, and such modifications or variations are also within the scope of the embodiments of the present invention. As shown in Fig. 19B, in the second charging mode, the charging procedure of the second adapter to be charged to the charging device (e.g., terminal), i.e., the charging procedure, can include five stages.

Stage 1: After the device to be charged (such as a terminal) is connected to the power supply device, the device to be charged (such as a terminal) can detect the type of the power supply device through the data lines D+, D-, and when detecting that the power supply device is the second adapter The current to be absorbed by the device to be charged (eg, the terminal) may be greater than a preset current threshold I2 (eg, may be 1A). When the control unit in the second adapter detects that the output current of the second adapter is greater than or equal to I2 within a preset duration (eg, may be continuous T1 time), the control unit may consider the device to be charged (eg, the terminal) to be powered The type identification of the providing device has been completed, the control unit opens a negotiation procedure between the second adapter and the device to be charged (such as the terminal), and sends an instruction 1 (corresponding to the first instruction) to the device to be charged (such as the terminal) to inquire Whether the device to be charged (such as a terminal) agrees to charge the second adapter in a second charging mode to charge the device (such as a terminal).

When the control unit receives the reply command of the instruction 1 sent by the device to be charged (such as the terminal), and the reply command of the command 1 indicates that the device to be charged (such as the terminal) does not agree with the second adapter to treat the device in the second charging mode (such as When the terminal is charging, the control unit detects the output current of the second adapter again. When the output current of the second adapter is still greater than or equal to I2 within a preset continuous time period (for example, may be continuous T1 time), the control unit again sends an instruction 1 to the device to be charged (such as the terminal) to inquire about the device to be charged. Whether the terminal, for example, the terminal, agrees to charge the charging device (e.g., terminal) in the second charging mode. The control unit repeats the above steps of phase 1 until the device to be charged (such as the terminal) agrees that the second adapter charges the device to be charged (such as the terminal) in the second charging mode, or the output current of the second adapter no longer satisfies greater than or equal to I2 conditions of.

When the device to be charged (such as a terminal) agrees that the second adapter charges the charging device (such as a terminal) in the second charging mode, the communication flow enters the second stage.

Phase 2: The output voltage of the second adapter can include a plurality of gears. The control unit sends an instruction 2 (corresponding to the second instruction) to the device to be charged (such as the terminal) to inquire whether the output voltage of the second adapter (current output voltage) matches the current voltage of the battery of the device to be charged (such as the terminal) . The device to be charged (such as a terminal) sends a reply command of the command 2 to the control unit to indicate that the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (eg, the terminal), is high or low. If the reply command for the instruction 2 indicates that the output voltage of the second adapter is high or low, the control unit may adjust the output voltage of the second adapter to a grid position and send the instruction 2 to the device to be charged (such as the terminal) again. Re-inquiring whether the output voltage of the second adapter matches the current voltage of the battery to be charged (such as the terminal). The above steps of phase 2 are repeated until the device to be charged (e.g., the terminal) determines that the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (e.g., the terminal), and proceeds to the third stage.

Stage 3: The control unit sends an instruction 3 (corresponding to the above-mentioned third instruction) to the device to be charged (such as the terminal), and queries the maximum charging current currently supported by the device to be charged (such as the terminal). The device to be charged (such as the terminal) sends a reply command of the command 3 to the control unit to indicate the maximum charging current currently supported by the device to be charged (such as the terminal), and enters the fourth stage.

Stage 4: The control unit determines, according to the maximum charging current currently supported by the device to be charged (such as the terminal), the charging current for charging the device to be charged (such as the terminal) output by the second adapter in the second charging mode, and then enters the stage. 5, that is, the constant current charging phase.

Stage 5: After entering the constant current charging phase, the control unit may send an instruction 4 (corresponding to the fourth instruction) to the device to be charged (such as the terminal) at intervals, and query the current voltage of the battery of the device to be charged (such as the terminal). . The device to be charged (such as a terminal) can send a reply command of the command 4 to the control unit to feed back the current voltage of the battery of the device to be charged (such as the terminal). The control unit can determine whether the contact of the charging interface is good according to the current voltage of the battery of the device to be charged (eg, the terminal), and whether it is necessary to lower the peak value of the current of the first pulsation waveform. When the second adapter determines that the charging interface is in poor contact, the instruction 5 (corresponding to the fifth instruction) may be sent to the device to be charged (such as the terminal), the second adapter will exit the second charging mode, and then reset and re-enter the phase 1. . Optionally, in some embodiments, in the phase 1, when the device to be charged (such as the terminal) sends the reply command of the command 1, the reply command of the command 1 may carry the path impedance of the device to be charged (such as the terminal). Information (or information). The path impedance data of the device to be charged (e.g., the terminal) can be used to determine if the contact of the charging interface is good at stage 5.

Optionally, in some embodiments, in phase 2, the device to be charged (such as a terminal) agrees that the second adapter charges the charging device (such as a terminal) in the second charging mode to the control unit to the second adapter. The time it takes for the output voltage to adjust to the appropriate charging voltage can be controlled within a certain range. If the time is outside the predetermined range, the second adapter or the device to be charged (such as the terminal) can determine that the fast charge communication program is abnormal and reset to re-enter phase 1. Optionally, in some embodiments, in stage 2, when the output voltage of the second adapter is higher than the current voltage of the battery to be charged (eg, the terminal) by ΔV (ΔV may be set to 200-500 mV), the device to be charged (e.g., the terminal) may send a reply command of instruction 2 to the control unit to indicate that the output voltage of the second adapter matches the battery voltage of the device to be charged (e.g., the terminal).

Optionally, in some embodiments, in stage 4, the adjustment speed of the output current of the second adapter can be controlled within a certain range, so as to avoid the second adapter in the second charging mode due to the too fast adjustment speed. An abnormality occurs in the output of the charging program to be charged to the charging device (such as the terminal). Alternatively, in some embodiments, in stage 5, the magnitude of the change in the output current of the second adapter may be controlled within 5%.

Alternatively, in some embodiments, in stage 5, the control unit can immediately monitor the path impedance of the charging circuit. Specifically, the control unit may monitor the path impedance of the charging circuit according to the output voltage of the second adapter, the output current, and the current voltage of the battery to be fed back by the device to be charged (eg, the terminal). When "the path impedance of the charging circuit" > "the path impedance of the device to be charged (such as the terminal) + the impedance of the charging cable", the charging interface may be considered to be in poor contact, and the second adapter stops in the second charging mode to be charged to the device ( Such as the terminal) to charge.

Optionally, in some embodiments, after the second adapter is turned on to charge the device to be charged (such as the terminal) in the second charging mode, the communication time interval between the control unit and the device to be charged (such as the terminal) may be controlled at Within a certain range, avoid the communication interval is too short and cause the communication program to be abnormal.

Optionally, in some embodiments, the stopping of the charging procedure (or the stopping of the charging procedure of the charging device (such as a terminal) of the second adapter in the second charging mode) may be divided into a recoverable stop and an unrecoverable stop. Two.

For example, when it is detected that the battery of the device to be charged (such as the terminal) is full or the charging interface is poorly contacted, the charging process is stopped, the charging communication program is reset, and the charging procedure re-enters Phase 1. Then, the charging device (such as the terminal) does not agree that the second adapter charges the charging device (such as the terminal) in the second charging mode, and the communication flow does not enter phase 2. The stop of the charging procedure in this case can be considered as an unrecoverable stop.

For another example, when a communication abnormality occurs between the control unit and the device to be charged (such as a terminal), the charging process is stopped, the charging communication program is reset, and the charging procedure re-enters Phase 1. After the requirements of phase 1 are met, the device to be charged (eg, the terminal) agrees that the second adapter charges the charging device (eg, the terminal) in the second charging mode to resume the charging procedure. The stop of the charging program in this case can be regarded as a recoverable stop.

For another example, when the device to be charged (such as the terminal) detects that the battery is abnormal, the charging process is stopped, the charging communication program is reset, and the charging procedure re-enters Phase 1. Then, the device to be charged (such as a terminal) does not agree that the second adapter charges the charging device (such as a terminal) in the second charging mode. When the battery returns to normal and meets the requirements of Phase 1, the device to be charged (such as the terminal) agrees that the second adapter charges the charging device (such as the terminal) in the second charging mode. The stop of the fast charge program in this case can be regarded as a recoverable stop.

The communication steps or operations shown above for FIG. 19B are merely examples. For example, in the phase 1, after the device to be charged (such as a terminal) is connected to the second adapter, the handshake communication between the device to be charged (such as the terminal) and the control unit may also be initiated by the device to be charged (such as a terminal), that is, The device to be charged (such as a terminal) sends an instruction 1 to inquire whether the control unit turns on the second charging mode. When the device to be charged (such as a terminal) receives a reply command from the control unit instructing the control unit to agree that the second adapter is to charge the device (such as a terminal) in the second charging mode, the second adapter starts to treat in the second charging mode. The battery of the charging device (such as the terminal) is charged.

As another example, after phase 5, a constant voltage charging phase can also be included. Specifically, in phase 5, the device to be charged (such as a terminal) can feed back the current voltage of the battery to the control unit. When the current voltage of the battery reaches the threshold value of the constant voltage charging voltage, the charging phase is switched from the constant current charging phase to the constant voltage. Charging phase. In the constant voltage charging phase, the charging current is gradually decreased, and when the current drops to a certain critical value, the entire charging process is stopped, indicating that the battery of the device to be charged (such as the terminal) has been fully charged.

Further, as shown in FIG. 20, on the basis of any of the above embodiments, the second adapter 10 can support the first charging mode and the second charging mode, and the second adapter is to be charged in the second charging mode (eg, The charging speed of the terminal is faster than the charging speed of the second adapter in the first charging mode to the charging device (such as the terminal). The power conversion unit 11 may include a secondary filtering unit 37, and the second adapter 10 may include a control unit 36 that is coupled to the secondary filtering unit 37. In the first charging mode, the control unit 36 controls the secondary filtering unit 37 to operate such that the voltage value of the output voltage of the second adapter 10 is constant. In the second charging mode, the control unit 36 controls the secondary filtering unit 37 to stop operating such that the output current of the second adapter 10 is the current of the first pulsating waveform.

In the embodiment of the present invention, the control unit may control whether the secondary filtering unit operates, so that the second adapter can output a common direct current with a constant current value or a pulsating direct current with a changed current value, thereby being compatible with the existing charging mode.

Optionally, in some embodiments, the second adapter loads the current of the first pulsating waveform directly across the battery of the device to be charged (eg, the terminal) to directly charge the battery.

Specifically, the direct charge may refer to directly loading (or directly guiding) the output voltage and the output current of the second adapter to the battery of the device to be charged (such as the terminal) to charge the battery of the device to be charged (such as the terminal). In the middle, there is no need to change the output current or output voltage of the second adapter through the conversion circuit to avoid energy loss caused by the conversion program. In the process of charging using the second charging mode, in order to be able to adjust the charging voltage or charging current on the charging circuit, the second adapter can be designed as a smart adapter, and the second adapter can complete the charging voltage or the charging current conversion. The burden on the device to be charged (such as the terminal) can be reduced, and the amount of heat generated by the device to be charged can be reduced.

The second adapter 10 of the embodiment of the present invention can operate in a constant current mode. The constant current mode herein refers to a charging mode that controls the output current of the second adapter, and does not require that the output current of the second adapter be kept constant. In practice, the second adapter is typically charged in a constant current mode using a piecewise constant current.

Multi-stage constant current charging has N charging phases (N is an integer not less than 2). The piecewise constant current charging can start the first stage charging with a predetermined charging current. The N charging phases of the segmented constant current charging are sequentially performed from the first phase to the (N-1)th phase, and the charging current value becomes smaller after the previous charging phase in the charging phase is transferred to the next charging phase. When the battery voltage reaches the charge termination voltage threshold, the previous charging phase in the charging phase will move to the next charging phase.

Further, in the case that the output current of the second adapter is pulsating direct current, the constant current mode may refer to a charging mode that controls the peak value or the average value of the pulsating direct current, that is, the peak value of the output current of the second adapter is controlled not to exceed the constant current mode. Corresponding current.

Embodiments of the present invention are described in more detail below with reference to specific examples. It should be noted that the examples of the 21st to the 22nd drawings are only for the purpose of facilitating the understanding of the embodiments of the present invention, and the embodiments of the present invention are not limited to the specific numerical values or specific examples illustrated. It will be obvious to those skilled in the art that various modifications and changes can be made without departing from the scope of the embodiments of the present invention.

The second adapter comprises a power conversion unit (corresponding to the power conversion unit 11 above), as shown in Fig. 21, the power conversion unit may comprise an input of an alternating current AC, a primary rectification unit 38, a transformer T1, a secondary rectification unit 39 and the first rectifying unit 20.

Specifically, the input of the alternating current AC introduces mains (typically 220V AC) and then transmits the mains to the primary rectification unit 38.

The primary rectifying unit 38 is for converting the mains to the current of the second pulsating waveform, and then transmitting the second pulsating direct current to the transformer T1. The primary rectification unit 38 can be a bridge rectification unit. For example, it may be a full-bridge rectifying unit as shown in FIG. 21, or may be a half-bridge rectifying unit, which is not specifically limited in the embodiment of the present invention.

Transformer T1 is used to couple the first pulsating direct current from the primary to the secondary of the transformer. The transformer T1 can be an ordinary transformer or a high frequency transformer with an operating frequency of 50 kHz to 2 MHz. The number of the primary windings of the transformer T1 and the connection form are related to the type of the switching power supply used in the second adapter, which is not specifically limited in the embodiment of the present invention. As shown in Fig. 21, the second adapter may be a flyback switching power supply, one end of the primary winding of the transformer is connected to the primary rectifying unit 38, and the other end of the primary winding is connected to a switch controlled by the PWM controller. Of course, the second adapter can also be a second adapter that uses a forward switching power supply or a push-pull switching power supply. The primary rectifying units and transformers in different types of switching power supplies have their own connection forms, which are not listed here for brevity.

The secondary rectifying unit 39 is configured to rectify the current initially coupled to the secondary to obtain a current of the first pulsating waveform. There are various forms of the secondary rectifying unit 39, and Fig. 21 shows a typical secondary synchronous rectification circuit. The synchronous rectification circuit comprises a Synchronous Rectifier (SR) chip, a Metal Oxide Semiconductor (MOS) tube controlled by the SR wafer, and a diode connected to the source and the drain of the MOS transistor. . The SR chip sends a PWM control signal to the gate of the MOS transistor to control the on and off of the MOS transistor, thereby achieving secondary synchronous rectification.

The first rectifying unit 20 is configured to rectify the current coupled to the secondary to obtain a synchronization signal. As shown in Fig. 21, the first rectifying unit 20 may be a forward rectifying circuit. The synchronization signal is a forward voltage of the forward rectifier circuit output.

Further, the second adapter may include a sample holding unit (corresponding to the sample holding unit 12 above). The sample hold unit includes a current sampling unit (corresponding to the current sampling unit 14 above) and a current holding unit (corresponding to the current holding unit 15 above). Specifically, as shown in FIG. 21, the current sampling unit specifically includes a current detecting resistor R3 and a galvanometer. The galvanometer detects the current of the first pulsation waveform through the current detecting resistor R3, obtains a sampling current, and converts the sampling current into a corresponding sampling voltage (the sampling voltage is used to indicate the magnitude of the current of the first pulsating waveform) .

The circuit holding unit includes voltage dividing resistors R4 and R5, and a capacitor C1. The circuit holding unit first divides the sampling voltage of the output 埠 (OUTPUT) output of the galvanometer through the voltage dividing resistors R4 and R5, and then charges the capacitor C1 by using the voltage obtained by dividing the voltage, so that the voltage across the capacitor C1 follows the first The current of a pulsating waveform changes as a function of current. When the first pulsation waveform reaches the peak or falling edge, the voltage across the capacitor C1 reaches a maximum value (this maximum value can correspond to the peak value of the current of the first pulsation waveform), and the sample holding unit enters the hold state.

Further, the second adapter includes a current acquisition control unit (corresponding to the current acquisition control unit 13 above). The current collection control unit may include an MCU (corresponding to the control unit above), a comparison unit 24, and a discharge unit 16.

In particular, comparison unit 24 may include a comparator. The first input of the comparator is for receiving a synchronization signal. The second input of the comparator is for receiving a reference voltage. In some embodiments, the first input is a non-inverting input and the second input is an inverting input. In other embodiments, the first input is an inverting input and the second input is a non-inverting input. The comparator sends the comparison result to the MCU.

The MCU determines when the first pulsation waveform is at a peak or a falling edge based on the comparison result of the comparator. When the first pulsation waveform is at the peak or falling edge, it indicates that the sample and hold circuit is in the hold state. The MCU collects the voltage across the capacitor C1 through the ADC to determine the peak value of the current of the first ripple waveform.

The discharge unit 16 may include a switching transistor Q3 and a resistor R6. After the MCU collects the peak value of the current of the first pulsation waveform, the MCU controls the switching transistor Q3 to be turned on, and the capacitor C1 discharges the resistor R6 to release the charge across the capacitor C1. In this way, the voltage across the capacitor C1 can be changed by following the change of the current of the first pulsation waveform, which indicates that the sample-and-hold unit is switched from the hold state to the sample state.

Further, the second adapter may include a voltage adjustment unit (corresponding to the voltage adjustment unit 28 above). The voltage adjustment unit may include a voltage sampling unit (corresponding to the voltage sampling unit 29 above), a voltage comparison unit (corresponding to the voltage comparison unit 30 above), and a voltage control unit (corresponding to the voltage control unit 31 above).

Specifically, as shown in FIG. 21, the voltage sampling unit includes a resistor R1 and a resistor R2 for dividing the output voltage of the second adapter to obtain a first voltage.

The voltage comparison unit includes an op amp OPA. The inverting input of the OPA is for receiving a first voltage. The non-inverting input of the OPA is coupled to the DAC for receiving a first reference voltage provided by the DAC. The DAC is connected to the MCU. The MCU can adjust the first reference voltage through the DAC to adjust the output voltage and/or output current of the second adapter.

The voltage control unit includes an optocoupler unit 40 and a PWM controller. The input of the optocoupler unit 40 is coupled to the output of the OPA. When the output voltage of the OPA is lower than the operating voltage VDD of the photo-coupling unit 40, the photo-coupling unit 40 starts operating to supply a feedback voltage to the FB terminal of the PWM controller. The PWM controller controls the duty cycle of the PWM signal output by the PWM terminal by comparing the voltages of the CS terminal and the FB terminal. When the output voltage of the OPA is 0, the voltage at the FB terminal is stable, and the duty ratio of the PWM control signal outputted by the PWM terminal of the PWM controller is kept constant. The PWM terminal of the PWM controller is connected to the primary winding of the transformer T1 through the switching transistor Q2 for controlling the output voltage and output current of the second adapter. When the duty ratio of the control signal sent from the PWM terminal is constant, the output voltage and output current of the second adapter remain stable.

In addition, the MCU can also include a communication interface. Through the communication interface, two-way communication can be performed with a device to be charged (such as a terminal) to control the charging process of the second adapter. For example, the charging interface is a USB interface, and the communication interface can also be the USB interface. Specifically, the second adapter can use a power line in the USB interface to charge a device to be charged (such as a terminal), and use a data line (D+ and/or D-) in the USB interface and a device to be charged (such as a terminal). communication. In addition, the photo-coupling unit 40 can also be connected to the voltage stabilizing unit such that the operating voltage of the optocoupler remains stable. As shown in FIG. 21, the voltage stabilizing unit in the embodiment of the present invention can be implemented by using a Low Dropout Regulator (LDO).

The embodiment of Fig. 22 is similar to the embodiment of Fig. 21 except that the voltage collecting unit composed of the resistor R1 and the resistor R2 in Fig. 21 is replaced with a digit potentiometer (the digit potentiometer corresponds to the above) The voltage dividing unit 34) connects the inverting input terminal of the OPA to a fixed second reference voltage, and the MCU adjusts the output voltage and the output current of the second adapter by adjusting the voltage dividing ratio of the digital potentiometer. For example, if the output voltage of the second adapter is desired to be 5V, the voltage division ratio of the digital potentiometer can be adjusted such that when the output voltage of the second adapter is 5V, the voltage at the output of the digital potentiometer is equal to the second reference voltage. Similarly, if the output voltage of the second adapter is desired to be 3V, the voltage dividing ratio of the digital potentiometer can be adjusted so that the output voltage of the digital adapter is equal to the second reference voltage when the output voltage of the second adapter is 3V.

In the embodiment shown in FIG. 21 to FIG. 22, the synchronization signal is rectified by the first rectifying unit 20. The embodiment of the present invention is not limited thereto, and the synchronization signal may be obtained from the primary of the second adapter. The implementation shown in Figure 9. Alternatively, the synchronization signal can be obtained from the sample holding unit as obtained from the output 埠 (OUTPUT) of the galvanometer shown in Figs. 21 to 22.

In the embodiment shown in FIGS. 21 to 22, the comparing unit 24 directly compares the synchronization signal with the reference voltage to determine whether the sample holding unit is in the hold state, but the embodiment of the present invention is not limited thereto. It is also possible to use the implementation shown in FIG. 13 to filter the DC signal in the synchronous signal by capacitor to obtain the AC signal of the zero crossing point, and then compare the AC signal of the zero crossing point with the reference voltage to determine whether the sampling and holding unit is in the On hold.

The control units identified herein by different reference numerals may be separate control units or the same control unit. Optionally, in some embodiments, the second adapter includes an MCU, and the control unit herein refers to the MCU.

The apparatus embodiments of the present invention are described in detail above with reference to FIGS. 1 through 22, and the method embodiments of the embodiments of the present invention are described in detail below with reference to FIG. It should be understood that the description of the method side corresponds to the description of the device side, and the duplicated description is appropriately omitted for the sake of brevity.

FIG. 23 is a schematic flowchart of a charging control method provided by an embodiment of the present invention. The method of Figure 23 can be applied to a second adapter, such as the second adapter, which can be described in Figures 1 through 22. The second adapter can include a power conversion unit and a sample and hold unit. The power conversion unit can be configured to convert the input alternating current to obtain an output voltage and an output current of the second adapter. The output current of the second adapter is the current of the first pulsating waveform. The sample and hold unit is coupled to the power conversion unit. The sample hold unit is configured to sample the current of the first pulsation waveform when the sample hold unit is in the sampling state. The sample holding unit is configured to maintain a peak value of a current of the first pulsation waveform when the sample holding unit is in a hold state.

The method of Fig. 23 includes the following actions.

2310. Determine whether the sample and hold unit is in a hold state.

2320. When it is determined that the sample holding unit is in the holding state, collect a peak value of a current of the first pulsation waveform held by the sample holding unit.

Optionally, in some embodiments, determining whether the sampling and holding unit is in the hold state may include: receiving a synchronization signal, wherein a period of the synchronization signal is 1/N of a period of the first pulsation waveform, and N is greater than or An integer equal to 1; determining whether the sample holding unit is in a hold state based on the synchronization signal.

Optionally, in some embodiments, the receiving the synchronization signal may include: acquiring the synchronization signal from the power conversion unit.

Optionally, in some embodiments, the power conversion unit includes a primary unit and a secondary unit. The obtaining the synchronization signal from the power conversion unit may include: acquiring the synchronization signal from the secondary unit.

Optionally, in some embodiments, the secondary unit comprises a first rectifying unit. The first rectifying unit is connected to the current collecting control unit. The first rectifying unit is configured to rectify a current of the primary unit coupled to the secondary unit to obtain a voltage in a second pulsating form, and send the voltage of the second pulsating waveform as the synchronous signal to the current collecting control unit.

Optionally, in some embodiments, the power conversion unit can include a primary unit and a secondary unit. The obtaining the synchronization signal from the power conversion unit may include: acquiring the synchronization signal from the primary unit.

Optionally, in some embodiments, the primary unit is configured to rectify the alternating current to obtain a voltage of the third pulsating waveform. The third pulsation waveform is the same as the first pulsation waveform period. The primary unit couples the voltage of the third pulsation waveform from the primary of the second adapter to the secondary of the second adapter through the optocoupler unit to obtain a voltage of the fourth pulsation waveform, and uses the voltage of the fourth pulsation waveform as The synchronization signal is sent to the current acquisition control unit.

Optionally, in some embodiments, the receiving the synchronization signal may include: acquiring the synchronization signal from the sampling and holding unit.

Optionally, in some embodiments, the sample holding unit is configured to sample a current of the first pulsation waveform, obtain a sampling current, convert the sampling current into a sampling voltage, and send the sampling voltage as a synchronization signal to the Current acquisition control unit. The sampled voltage is used to indicate the magnitude of the current of the first pulsation waveform.

Optionally, in some embodiments, determining whether the sampling and holding unit is in the hold state based on the synchronization signal may include: determining, according to the synchronization signal, whether the first pulsation waveform is at a peak or a falling edge; In the case where a pulsation waveform is at a peak or a falling edge, it is determined that the sample holding unit is in a hold state.

Optionally, in some embodiments, determining whether the first pulsation waveform is at a peak or a falling edge based on the synchronization signal may include: determining the first pulsation based on a comparison result of a voltage of the synchronization signal and a reference voltage Whether the waveform is at the peak or falling edge.

Optionally, in some embodiments, determining whether the first pulsation waveform is at a peak or a falling edge based on the synchronization signal may include: filtering a DC signal in the synchronization signal to obtain an AC signal of a zero crossing; and comparing the The voltage of the alternating signal and the reference voltage; determining whether the first ripple waveform is at a peak or a falling edge based on a comparison between the voltage of the alternating signal and the reference voltage, wherein the voltage value of the reference voltage is zero.

Optionally, in some embodiments, the period of the first pulsation waveform is the same as the period of the synchronization signal.

Optionally, in some embodiments, the method of FIG. 23 may further include: controlling the sampling and holding unit to switch from the hold state to the sampling state after acquiring the peak value of the current of the first pulsation waveform.

Optionally, in some embodiments, the sample and hold unit comprises a capacitor. The sample hold unit maintains a peak value of a current of the first pulsation waveform based on a capacitance in the sample hold unit. The controlling the switching of the sample holding unit from the hold state to the sample state may include releasing the charge across the capacitor in the sample hold unit such that the sample hold unit transitions from the hold state to the sample state.

Optionally, in some embodiments, the second adapter further includes a voltage adjustment unit. The voltage adjustment unit is connected to the power conversion unit for detecting and adjusting an output voltage of the second adapter. The method of FIG. 23 may further include: adjusting a peak value of the current of the first pulsation waveform by the voltage adjustment unit.

Optionally, in some embodiments, the voltage adjustment unit includes: a voltage sampling unit, a voltage comparison unit, and a voltage control unit. The voltage sampling unit is connected to the power conversion unit for sampling the output voltage of the second adapter to obtain a first voltage. An input end of the voltage comparison unit is coupled to the voltage sampling unit for comparing the first voltage with the first reference voltage. An input of the voltage control unit is coupled to an output of the voltage comparison unit. An output of the voltage control unit is coupled to the power conversion unit. The voltage control unit controls an output voltage of the second adapter according to a comparison result of the first voltage and the first reference voltage. The adjusting the peak value of the current of the first pulsation waveform by the voltage adjusting unit may include adjusting a peak value of the current of the first pulsation waveform by adjusting a voltage value of the first reference voltage.

Optionally, in some embodiments, adjusting the peak value of the current of the first pulsation waveform by adjusting the voltage value of the first reference voltage may include: adjusting a voltage value of the first reference voltage by using a digital DAC to adjust The peak value of the current of the first pulsating waveform.

Optionally, in some embodiments, the voltage adjustment unit includes a voltage dividing unit, a voltage comparison unit, and a voltage control unit. The input end of the voltage dividing unit is connected to the power conversion unit, and is configured to divide the output voltage of the second adapter according to the set voltage dividing ratio to generate a second voltage. An input end of the voltage comparison unit is connected to an output end of the voltage dividing unit for comparing the second voltage and the second reference voltage. An input of the voltage control unit is coupled to an input of the voltage comparison unit. An output of the voltage control unit is coupled to the power conversion unit. The voltage control unit controls an output voltage of the second adapter according to a comparison result of the second voltage and the second reference voltage. The adjusting the peak value of the current of the first pulsation waveform by the voltage adjusting unit may include adjusting a peak value of the current of the first pulsation waveform by adjusting the voltage dividing ratio.

Optionally, in some embodiments, the voltage dividing unit comprises a digital potentiometer. The high potential end of the digital potentiometer is connected to the power conversion unit. The low potential end of the digital potentiometer is connected to the ground. The output of the digital potentiometer is connected to the voltage comparison unit. By adjusting the voltage dividing ratio, adjusting the peak value of the current of the first pulsation waveform may include adjusting a voltage dividing ratio of the digital potentiometer to adjust a peak value of the current of the first pulsation waveform.

Optionally, in some embodiments, the sample and hold unit may include a current sampling unit and a current holding unit. The current sampling unit is connected to the power conversion unit for detecting the current of the first pulsation waveform, obtaining a sampling current, and converting the sampling current into a sampling voltage. The sampled voltage is used to indicate the magnitude of the current of the first pulsation waveform. A current holding unit is coupled to the current sampling unit and the current acquisition control unit. The current holding unit receives the sampling voltage from the current sampling unit and charges the capacitance in the current holding unit based on the sampling voltage. The collecting the peak value of the current of the first pulsation waveform held by the sample holding unit may include acquiring a peak value of the current of the first pulsation waveform by collecting a voltage across the capacitor in the sample holding unit.

Optionally, in some embodiments, the collecting the peak value of the current of the first pulsation waveform held by the sample holding unit may include: acquiring a peak value of the current of the first pulsation waveform based on the ADC.

Optionally, in some embodiments, the second adapter supports the first charging mode and the second charging mode. The second adapter charges the charging device faster in the second charging mode than the charging speed of the second adapter in the first charging mode. The current of the first pulsation waveform is the output current of the second adapter in the second charging mode. The method of FIG. 23 may further include: performing two-way communication with the device to be charged in the program of the second adapter connected to the device to be charged to control the output of the second adapter in the second charging mode.

Optionally, in some embodiments, the program for bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode may include: performing two-way communication with the device to be charged, To negotiate a charging mode between the second adapter and the device to be charged.

Optionally, in some embodiments, the two-way communication with the device to be charged to negotiate the charging mode between the second adapter and the device to be charged may include: sending a first instruction to the device to be charged, The first instruction is used to query whether the to-be-charged device turns on the second charging mode; and receives a reply instruction of the first instruction sent by the device to be charged, and the reply instruction of the first instruction is used to indicate whether the device to be charged agrees to open The second charging mode is configured to charge the device to be charged using the second charging mode when the device to be charged agrees to turn on the second charging mode.

Optionally, in some embodiments, the program for bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode may include: performing two-way communication with the device to be charged, Determining, by the second adapter in the second charging mode, a charging voltage for charging the device to be charged; adjusting an output voltage of the second adapter such that an output voltage of the second adapter is equal to The charging voltage output by the second adapter in the second charging mode for charging the device to be charged.

Optionally, in some embodiments, the two-way communication with the device to be charged determines that a charging voltage for charging the device to be charged output by the second adapter in the second charging mode may be The method includes: sending a second instruction to the device to be charged, the second command is used to query whether an output voltage of the second adapter matches a current voltage of a battery of the device to be charged; and receiving the second command sent by the device to be charged The reply instruction of the second instruction is used to indicate that the output voltage of the second adapter matches the current voltage of the battery, being high or low.

Optionally, in some embodiments, the program for bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode may include: performing bidirectional communication with the device to be charged Determining, by the second adapter in the second charging mode, a charging current for charging the device to be charged; adjusting a peak value of the current of the first pulsating waveform to make the first pulsating waveform The peak value of the current is equal to the charging current output by the second adapter in the second charging mode for charging the device to be charged.

Optionally, in some embodiments, the two-way communication with the device to be charged determines that the charging current output by the second adapter in the second charging mode for charging the device to be charged may be The method includes: sending a third command to the device to be charged, the third command is used to query a maximum charging current currently supported by the device to be charged; and receiving a reply command of the third command sent by the device to be charged, the third command The reply command is used to indicate a maximum charging current currently supported by the device to be charged; determining, according to the maximum charging current currently supported by the device to be charged, the output of the second adapter in the second charging mode for performing the device to be charged Charging current.

Optionally, in some embodiments, the program for bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode may include: charging using the second charging mode In the program, two-way communication is performed with the device to be charged to adjust the peak value of the current of the first pulsation waveform.

Optionally, in some embodiments, the bidirectional communication with the device to be charged to adjust the peak value of the current of the first pulsation waveform may include: a fourth instruction sent to the device to be charged, the fourth instruction a current voltage for inquiring the battery of the device to be charged; receiving a reply command of the fourth command sent by the second adapter, the reply command of the fourth command is used to indicate a current voltage of the battery; according to a current voltage of the battery And adjusting the peak value of the current of the first pulsation waveform.

Optionally, in some embodiments, the second adapter includes a charging interface, and the second adapter performs bidirectional communication with the device to be charged through a data line in the charging interface.

Optionally, in some embodiments, the second adapter supports the first charging mode and the second charging mode. The first charging mode is a constant voltage mode. The second charging mode is a constant current mode. The current of the first pulsation waveform is the output current of the second adapter in the second charging mode. The second adapter includes a control unit. The power conversion unit includes a secondary filtering unit. The control unit is coupled to the secondary filtering unit. The method of FIG. 23 may further include: controlling, in the first charging mode, the secondary filtering unit to operate such that a voltage value of the output voltage of the second adapter is constant; and in the second charging mode, controlling the secondary The filtering unit stops working such that the output current of the second adapter is the current of the first pulsating waveform.

Optionally, in some embodiments, the second adapter directly loads the current of the first pulsating waveform on both ends of the battery of the device to be charged, and directly charges the battery.

Optionally, in some embodiments, the second adapter is a second adapter for charging a mobile terminal.

Optionally, in some embodiments, the second adapter includes a control unit for controlling the charging program, the control unit being an MCU. Optionally, in some embodiments, the second adapter includes a charging interface, and the charging interface is a USB interface.

It should be understood that the "first adapter" and "second adapter" herein are for convenience of description only, and are not intended to limit the specific types of adapters of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in the form of an electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention. A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working procedures of the system, the device and the unit described above can refer to the corresponding programs in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, a plurality of units or components may be combined or may be integrated into Another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

This function, if implemented as a software functional unit and sold or used as a standalone product, can be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in part of the prior art, and the computer software product is stored in a storage medium, including several The instructions are for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of various embodiments of the present invention. The foregoing storage medium includes: a flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or a compact disk, and the like. Media.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the patent application.

10‧‧‧second adapter

11‧‧‧Power Conversion Unit

12‧‧‧Sampling and holding unit

13‧‧‧ Current Acquisition Control Unit

14‧‧‧current sampling unit

15‧‧‧current holding unit

16‧‧‧discharge unit

17, 23, 25, 32‧‧‧ control unit

18‧‧‧Primary unit

19‧‧‧Secondary unit

20‧‧‧First rectification unit

21‧‧‧optocoupler unit

22, 27‧‧‧ comparator

24‧‧‧Comparative unit

26‧‧‧ Capacitance

28‧‧‧Voltage adjustment unit

29‧‧‧Voltage sampling unit

30‧‧‧Voltage comparison unit

31‧‧‧Voltage control unit

33‧‧‧Digital to Analog Converter (DAC)

34‧‧‧Dividing unit

35‧‧‧Digital potentiometer

38‧‧‧Primary rectifier unit

39‧‧‧Secondary rectifier unit

40‧‧‧Photoelectric coupling unit

191‧‧‧Charging interface

192‧‧‧Information line

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work. Fig. 1 is a schematic structural view of a second adapter of one embodiment of the present invention. 2A and 2B are schematic views of the pulsation waveforms of the embodiment of the present invention. Fig. 3 is a schematic structural view of a second adapter according to another embodiment of the present invention. Fig. 4 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Fig. 5 is a view showing an example of the phase relationship between the sync signal and the first pulsation waveform in the embodiment of the present invention. Fig. 6 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Fig. 7 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Fig. 8 is a schematic structural view of a second adapter according to still another embodiment of the present invention. FIG. 9 is a diagram showing an example of a method of acquiring a synchronization signal according to an embodiment of the present invention. Fig. 10 is a schematic structural view of a current collecting control unit according to an embodiment of the present invention. Figure 11 is a diagram showing the relationship between the reference voltage, the output potential of the comparator, and the output current of the second adapter in accordance with one embodiment of the present invention. Fig. 12 is a view showing the relationship between the reference voltage, the output potential of the comparator, and the waveform of the output current of the second adapter according to another embodiment of the present invention. Figure 13 is a schematic structural view of a current collecting control unit of another embodiment of the present invention. Figure 14 is a schematic structural view of a second adapter of still another embodiment of the present invention. Figure 15 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Figure 16 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Figure 17 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Figure 18 is a schematic structural view of a second adapter according to still another embodiment of the present invention. FIG. 19A is a schematic diagram showing the connection manner of the second adapter and the device to be charged according to the embodiment of the present invention. Figure 19B is a schematic diagram of a fast charge communication program in accordance with an embodiment of the present invention. Figure 20 is a schematic structural view of a second adapter according to still another embodiment of the present invention. Figure 21 is a circuit diagram showing the structure of a second adapter according to an embodiment of the present invention. Figure 22 is a circuit diagram showing the structure of a second adapter according to another embodiment of the present invention. Figure 23 is a schematic flow chart of a charging control method according to an embodiment of the present invention.

Claims (52)

An adapter, comprising: a power conversion unit, configured to convert an input alternating current to obtain an output voltage and an output current of the adapter, wherein an output current of the adapter is a current of a first pulsating waveform a sample holding unit connected to the power conversion unit, wherein the sample holding unit is configured to sample a current of the first pulsation waveform when the sample holding unit is in a sampling state, when the sample holding unit is in a hold state, The sampling and holding unit is configured to maintain a peak value of the current of the first pulsation waveform; a current collection control unit is connected to the sample and hold unit, and the current collection control unit is configured to determine whether the sample and hold unit is in a hold state, and is determining The peak value of the current of the first pulsation waveform held by the sample holding unit is acquired in the case where the sample holding unit is in the hold state; wherein the adapter is an adapter for charging the mobile terminal. The adapter of claim 1, wherein the adapter further comprises: a voltage adjustment unit connected to the power conversion unit for detecting and adjusting an output voltage of the adapter; wherein the current collection The control unit is connected to the voltage adjustment unit, and the peak of the current of the first pulsation waveform is adjusted by the voltage adjustment unit. The adapter of claim 2, wherein the voltage adjustment unit comprises: a voltage dividing unit, the input end of the voltage dividing unit is connected to the power conversion unit, and the adapter is used according to the set voltage dividing ratio The output voltage is divided to generate a second voltage; a voltage comparison unit, the input end of the voltage comparison unit is connected to the output end of the voltage dividing unit for comparing the second voltage and a second reference voltage; a voltage control unit, an input end of the voltage control unit is connected to an input end of the voltage comparison unit, an output end of the voltage control unit is connected to the power conversion unit, and the voltage control unit is configured according to the second voltage and the second reference voltage Comparing results, controlling the output voltage of the adapter; The current acquisition control unit is connected to the voltage comparison unit, and adjusts the voltage division ratio to adjust a peak value of the current of the first pulsation waveform. The adapter of claim 3, wherein the current collecting control unit comprises a control unit, the voltage dividing unit comprises a digital potentiometer, and the high potential end of the digital potentiometer is connected to the power converting unit, The low potential end of the digital potentiometer is connected to the ground, and the output end of the digital potentiometer is connected to the voltage comparison unit, and the control unit is connected to the control end of the digital potentiometer, and the digital potential is adjusted by the control end of the digital potentiometer The voltage division ratio of the device to adjust the peak value of the current of the first pulsation waveform. The adapter of any one of the preceding claims, wherein the current collection control unit is configured to receive a synchronization signal, and determine, according to the synchronization signal, whether the sample and hold unit is in a hold state, wherein The period of the synchronization signal is 1/N of the period of the first pulsation waveform, and N is an integer greater than or equal to 1. The adapter of claim 5, wherein the current acquisition control unit determines whether the first pulsation waveform is at a peak or a falling edge based on the synchronization signal, and determines that the first pulsation waveform is at a peak or a falling edge. In the case of the current, the peak value of the current of the first pulsation waveform held by the sample holding unit is acquired. The adapter of claim 6, wherein the current collection control unit comprises: a comparator and a control unit, the first input of the comparator is configured to receive the synchronization signal, and the second of the comparator The input end is configured to receive a reference voltage, and the control unit is connected to the output end of the comparator, and based on a comparison result of the voltage of the synchronous signal and the reference voltage, determining whether the first pulsation waveform is at a peak or a falling edge. The adapter of claim 5, wherein the period of the first pulsation waveform is the same as the period of the synchronization signal. The adapter of claim 1, wherein the current acquisition control unit is further configured to control the sampling and holding unit to switch from the hold state to the sample state after collecting the peak value of the current of the first pulsation waveform. The adapter of claim 9, wherein the sample holding unit comprises a capacitor, and the sample holding unit maintains a peak value of a current of the first pulsation waveform based on a capacitance in the sample holding unit, the current collection control unit A discharge unit and a control unit are respectively connected to the capacitors in the control unit and the sample and hold unit, and the discharge unit is configured to release the charge across the capacitor in the sample and hold unit under the control of the control unit Thereby, the sample holding unit is switched from the hold state to the sample state. The adapter of claim 1, wherein the sample holding unit comprises: a current sampling unit connected to the power conversion unit for detecting a current of the first pulsation waveform, obtaining a sampling current, and Sampling current is converted into a sampling voltage, the sampling voltage is used to indicate the magnitude of the current of the first pulsating waveform; a current holding unit is connected to the current sampling unit and the current collecting control unit, and the current holding unit is from the current sampling unit Receiving the sampling voltage, and charging the capacitor in the current holding unit based on the sampling voltage; wherein the current collecting control unit collects a peak value of the current of the first pulsation waveform by detecting a voltage across the capacitor in the sampling and holding unit. The adapter of claim 1, wherein the current acquisition control unit comprises an analog digital converter ADC, and the current acquisition control unit acquires a peak value of the current of the first pulsation waveform based on the ADC. The adapter of claim 1, wherein the adapter supports a first charging mode and a second charging mode, and the adapter charges the device to be charged in the second charging mode. The electrical speed is faster than the charging speed of the adapter to the device to be charged in the first charging mode, the current of the first pulsating waveform is the output current of the adapter in the second charging mode, the adapter includes a control unit, The program is connected to the device to be charged, and the control unit performs bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode. The adapter of claim 13, wherein the control unit performs bidirectional communication with the device to be charged to control an output of the adapter in the second charging mode, comprising: the control unit and the The device to be charged performs two-way communication to negotiate a charging mode between the adapter and the device to be charged. The adapter of claim 14, wherein the control unit performs two-way communication with the device to be charged to negotiate a charging mode between the adapter and the device to be charged, including: the control unit is to be charged The device sends a first command, the first command is used to query whether the device to be charged is enabled to turn on the second charging mode; the control unit receives a reply command of the first command sent by the device to be charged, and the reply of the first command The instruction is used to indicate whether the device to be charged agrees to turn on the second charging mode; and when the device to be charged agrees to turn on the second charging mode, the control unit uses the second charging mode to charge the device to be charged. The adapter of claim 13, wherein the control unit performs bidirectional communication with the device to be charged to control an output of the adapter in the second charging mode, comprising: the control unit and the The charging device performs two-way communication to determine a charging voltage output by the adapter for charging the device to be charged in the second charging mode; the control unit adjusts an output voltage of the adapter to make the adapter The output voltage is equal to the charging voltage output by the adapter in the second charging mode for charging the device to be charged. The adapter of claim 16, wherein the control unit performs two-way communication with the device to be charged to determine the output of the adapter for charging the device to be charged in the second charging mode. The charging voltage includes: the control unit sends a second instruction to the device to be charged, the second command is used to query whether an output voltage of the adapter matches a current voltage of a battery of the device to be charged; and the control unit receives the The reply instruction of the second instruction sent by the charging device, the reply instruction of the second instruction is used to indicate that the output voltage of the adapter matches the current voltage of the battery, being high or low. The adapter of claim 13, wherein the control unit performs bidirectional communication with the device to be charged to control an output of the adapter in the second charging mode, comprising: the control unit and the The charging device performs two-way communication to determine a charging current output by the adapter for charging the device to be charged in the second charging mode; the control unit adjusts a peak value of the current of the first pulsating waveform, The peak value of the current of the first pulsation waveform is equal to the charging current output by the adapter in the second charging mode for charging the device to be charged. The adapter of claim 18, wherein the control unit performs two-way communication with the device to be charged to determine the output of the adapter for charging the device to be charged in the second charging mode. The charging current includes: the control unit sends a third command to the device to be charged, the third command is used to query a maximum charging current currently supported by the device to be charged; and the control unit receives the third device sent by the device to be charged a reply command of the command, the reply command of the third command is used to indicate a maximum charging current currently supported by the device to be charged; and the control unit determines the current charging mode in the second charging mode according to a maximum charging current currently supported by the device to be charged A charging current output by the adapter for charging the device to be charged. The adapter of claim 13, wherein the control unit performs bidirectional communication with the device to be charged to control an output of the adapter in the second charging mode, including: using the second In the charging mode charging process, the control unit performs bidirectional communication with the device to be charged to adjust the peak value of the current of the first pulsation waveform. The adapter of claim 20, wherein the control unit performs bidirectional communication with the device to be charged to adjust a peak value of the current of the first pulsation waveform, including: the control unit sends the device to the device to be charged a fourth command for inquiring about a current voltage of the battery of the device to be charged; the control unit receiving a reply command of the fourth command sent by the adapter, the reply command of the fourth command is used to indicate the battery The current voltage; the control unit adjusts the peak value of the current of the first pulsation waveform according to the current voltage of the battery. The adapter of claim 13, wherein the adapter comprises a charging interface, and the control unit performs bidirectional communication with the device to be charged through a data line in the charging interface. The adapter of claim 1, wherein the adapter supports a first charging mode and a second charging mode, the first charging mode is a constant voltage mode, and the second charging mode is a constant current mode, The current of the first pulsation waveform is the output current of the adapter in the second charging mode, the adapter includes a control unit, and the power conversion unit includes a primary filtering unit, and the control unit is connected to the secondary filtering unit. In the first charging mode, the control unit controls the secondary filtering unit to operate such that the voltage value of the output voltage of the adapter is constant; in the second charging mode, the control unit controls the secondary filtering unit to stop working, so that the The output current of the adapter is the current of the first pulsating waveform. The adapter of claim 1, wherein the adapter directly loads the current of the first pulsation waveform at both ends of the battery of the device to be charged, and directly charges the battery. The adapter of claim 1, wherein the adapter comprises a control unit for controlling a charging program, the control unit being a micro control unit MCU. The adapter of claim 1, wherein the adapter comprises a charging interface, and the charging interface is a universal serial bus USB interface. A charging control method is characterized in that the method is applied to an adapter, the adapter comprising a power conversion unit and a sample and hold unit, the power conversion unit is configured to convert an input alternating current to obtain an output voltage and an output of the adapter a current, wherein the output current of the adapter is a current of a first pulsating waveform, the sample holding unit is connected to the power conversion unit, and the sample holding unit is configured to use the first pulsation waveform when the sample holding unit is in a sampling state The current is sampled, and the sample holding unit is configured to maintain a peak value of the current of the first pulsation waveform when the sample holding unit is in a hold state, the method comprising: determining whether the sample hold unit is in a hold state; The sample holding unit is in the hold state, and collects a peak value of the current of the first pulsation waveform held by the sample holding unit; wherein the adapter is an adapter for charging the mobile terminal. The charging control method of claim 27, wherein the adapter further comprises a voltage adjusting unit connected to the power converting unit for detecting and adjusting an output voltage of the adapter; The method includes: adjusting, by the voltage adjusting unit, a peak value of a current of the first pulsation waveform. The charging control method of claim 28, wherein the voltage adjusting unit comprises: a voltage dividing unit, the input end of the voltage dividing unit is connected to the power conversion unit, and is configured to divide the output voltage of the adapter according to the set voltage dividing ratio to generate a second voltage; a voltage comparing unit, the voltage The input end of the comparison unit is connected to the output end of the voltage dividing unit for comparing the second voltage and a second reference voltage; a voltage control unit, the input end of the voltage control unit is connected to the input end of the voltage comparison unit An output end of the voltage control unit is connected to the power conversion unit, and the voltage control unit controls an output voltage of the adapter according to a comparison result of the second voltage and the second reference voltage; and the voltage adjustment unit adjusts the The peak value of the current of the first pulsation waveform includes: adjusting the peak value of the current of the first pulsation waveform by adjusting the voltage division ratio. The charging control method according to claim 29, wherein the voltage dividing unit comprises a digital potentiometer, and the high potential end of the digital potentiometer is connected to the power converting unit, and the low potential end of the digital potentiometer is Connected to the ground, the output end of the digital potentiometer is connected to the voltage comparison unit, and the peak of the current of the first pulsation waveform is adjusted by adjusting the voltage division ratio, including: adjusting a voltage division ratio of the digital potentiometer to adjust The peak value of the current of the first pulsating waveform. The charging control method according to any one of claims 27 to 30, wherein the determining whether the sampling and holding unit is in a hold state comprises: receiving a synchronization signal, wherein a period of the synchronization signal is 1/N of the period of the first pulsation waveform, N is an integer greater than or equal to 1; based on the synchronization signal, it is determined whether the sample holding unit is in a hold state. The charging control method of claim 31, wherein determining whether the sampling and holding unit is in a hold state based on the synchronization signal comprises: determining whether the first pulsation waveform is at a peak or a drop based on the synchronization signal In the case where it is judged that the first pulsation waveform is at the peak or the falling edge, it is determined that the sample holding unit is in the hold state. The charging control method of claim 32, wherein the determining, according to the synchronization signal, whether the first pulsation waveform is at a peak or a falling edge comprises: comparing a voltage based on the synchronization signal with a reference voltage And determining whether the first pulsation waveform is at a peak or a falling edge. The charging control method according to claim 31, wherein the period of the first pulsation waveform is the same as the period of the synchronization signal. The charging control method according to claim 27, wherein the method further comprises: after collecting the peak value of the current of the first pulsation waveform, controlling the sampling and holding unit to switch from the holding state to the sampling state. The charging control method according to claim 35, wherein the sample holding unit includes a capacitor, and the sample holding unit maintains a peak value of a current of the first pulsation waveform based on a capacitance in the sample holding unit, wherein the sampling is controlled The transition of the holding unit from the hold state to the sample state includes releasing the charge across the capacitor in the sample hold unit such that the sample hold unit transitions from the hold state to the sample state. The charging control method of claim 27, wherein the sampling and holding unit comprises: a current sampling unit connected to the power conversion unit for detecting a current of the first pulsation waveform to obtain a sampling current, And converting the sampling current into a sampling voltage, the sampling voltage is used to indicate the magnitude of the current of the first pulsating waveform; a current holding unit is connected to the current sampling unit and the current collecting control unit, and the current holding unit is Receiving, by the current sampling unit, the sampling voltage, and charging the capacitor in the current holding unit based on the sampling voltage; collecting the peak value of the current of the first pulsation waveform held by the sampling and holding unit, including: The peak value of the current of the first pulsation waveform is obtained by collecting the voltage across the capacitor in the sample and hold unit. The charging control method of claim 27, wherein the collecting the peak value of the current of the first pulsation waveform held by the sampling and holding unit comprises: collecting the current of the first pulsation waveform based on an analog-to-digital converter ADC Peak. The charging control method according to claim 27, wherein the adapter supports a first charging mode and a second charging mode, and the adapter charges the charging device faster than the charging device in the second charging mode. The charging speed of the adapter to the charging device in the first charging mode, the current of the first pulsating waveform is the output current of the adapter in the second charging mode, the method further comprising: the adapter and the to be charged In the program connected to the device, two-way communication with the device to be charged is performed to control the output of the adapter in the second charging mode. The charging control method of claim 39, wherein the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode comprises: Two-way communication is performed to negotiate a charging mode between the adapter and the device to be charged. The charging control method according to claim 40, wherein the two-way communication with the device to be charged to negotiate a charging mode between the adapter and the device to be charged includes: transmitting to the device to be charged a first instruction, the first instruction is used to query whether the to-be-charged device turns on the second charging mode, and receives a reply instruction of the first instruction sent by the to-be-charged device, where the reply instruction of the first instruction is used to indicate the Whether the device to be charged agrees to turn on the second charging mode; The second charging mode is used to charge the device to be charged when the device to be charged agrees to turn on the second charging mode. The charging control method of claim 39, wherein the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode comprises: charging with the to-be-charged The device performs two-way communication to determine a charging voltage output by the adapter for charging the device to be charged in the second charging mode; adjusting an output voltage of the adapter such that an output voltage of the adapter is equal to The charging voltage output by the adapter in the second charging mode for charging the device to be charged. The charging control method of claim 42, wherein the two-way communication with the device to be charged determines the output of the adapter in the second charging mode for charging the device to be charged The charging voltage includes: sending a second command to the device to be charged, the second command is used to query whether an output voltage of the adapter matches a current voltage of a battery of the device to be charged; and receiving the The reply instruction of the second instruction is used to indicate that the output voltage of the adapter matches the current voltage of the battery, being high or low. The charging control method of claim 39, wherein the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode comprises: charging with the to-be-charged The device performs two-way communication to determine a charging current output by the adapter for charging the device to be charged in the second charging mode; adjusting a peak value of the current of the first pulsation waveform to make the first pulsation The peak value of the current of the waveform is equal to the charging current output by the adapter in the second charging mode for charging the device to be charged. The charging control method according to claim 44, wherein the two-way communication with the device to be charged determines two-way output of the adapter in the second charging mode for charging the device to be charged The charging current includes: sending a third command to the device to be charged, the third command is used to query a maximum charging current currently supported by the device to be charged; and receiving a reply command of the third command sent by the device to be charged, The reply instruction of the third instruction is used to indicate a maximum charging current currently supported by the device to be charged; determining, according to the maximum charging current currently supported by the device to be charged, the output of the adapter in the second charging mode is used for the to-be-charged device The charging device charges the charging current. The charging control method of claim 39, wherein the program for bidirectional communication with the device to be charged to control an output of the adapter in the second charging mode comprises: using the In the charging mode charging process, two-way communication is performed with the device to be charged to adjust the peak value of the current of the first pulsation waveform. The charging control method according to claim 46, wherein the two-way communication with the device to be charged to adjust a peak value of the current of the first pulsation waveform includes: transmitting a first to the device to be charged a fourth command for inquiring about a current voltage of the battery of the device to be charged; receiving a reply command of the fourth command sent by the adapter, the reply command of the fourth command is used to indicate a current voltage of the battery; The current voltage of the battery adjusts the peak value of the current of the first pulsation waveform. The charging control method according to claim 39, wherein the adapter comprises a charging interface, and the adapter performs bidirectional communication with the device to be charged through a data line in the charging interface. The charging control method according to claim 27, wherein the adapter supports a first charging mode and a second charging mode, the first charging mode is a constant voltage mode, and the second charging mode is a constant current mode. The current of the first pulsation waveform is an output current of the adapter in the second charging mode, the adapter includes a control unit, the power conversion unit includes a secondary filtering unit, and the control unit is connected to the secondary filtering unit, The method further includes: controlling, in the first charging mode, the secondary filtering unit to operate such that a voltage value of the output voltage of the adapter is constant; in the second charging mode, controlling the secondary filtering unit to stop operating, such that The output current of the adapter is the current of the first pulsating waveform. The charging control method according to claim 27, wherein the adapter directly loads the current of the first pulsation waveform at both ends of the battery of the device to be charged, and directly charges the battery. The charging control method according to claim 27, wherein the adapter comprises a control unit for controlling a charging program, the control unit being a micro control unit MCU. The charging control method of claim 27, wherein the adapter comprises a charging interface, and the charging interface is a universal serial bus USB interface.