TW201804705A - Adapter and charging control method - Google Patents

Abstract

Embodiments of the present disclosure provide an adapter and a charging control method. The adapter includes a power converting unit, configured to convert an input alternating current to obtain an output voltage and an output current of the adapter, the power converting unit includes a secondary filtering unit, a controlling unit, connected to the secondary filtering unit. When the adapter is working in a first charging mode, the controlling unit controls the secondary filtering unit to work to enable the adapter to output a constant direct current. When the adapter is working in a second charging mode, the controlling unit controls the secondary filtering unit to stop working to enable the adapter to output an alternating current or a pulsating direct current. The adapter according to embodiment of the present disclosure can reduce lithium precipitating phenomenon of a battery and improve the battery life.

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 supporting a first charging mode and a second charging mode, 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 power conversion unit includes a primary filtering unit, and the control unit is connected to the secondary filtering unit. When the adapter operates in the first charging mode, the control unit controls the secondary filtering unit to operate, so that the adapter The constant DC power is output. When the adapter operates in the second charging mode, the control unit controls the secondary filtering unit to stop working, so that the adapter outputs alternating current or pulsating direct current.

In a second aspect, a charging control method is provided, the method being applied to an adapter, the 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, the power The conversion unit includes a primary filtering unit, the method comprising: controlling the secondary filtering unit of the adapter to operate such that the adapter outputs a constant direct current when the adapter operates in the first charging mode; and operating the second charging in the adapter In the case of the mode, the secondary filtering unit is controlled to stop working, so that the adapter outputs alternating current or pulsating direct current.

The adapter of the embodiment of the invention can reduce the lithium deposition phenomenon of the battery when outputting alternating current or pulsating direct current to charge the battery, reduce the probability and intensity of the arcing of the contact of the charging interface, and improve the life of the charging interface, and further, the implementation of the invention The adapters of the example are also capable of flexible switching between different charging modes.

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 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 a plurality of trickle charging phases, 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).

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 and a control unit 12.

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, and the power conversion unit 11 includes a primary filtering unit;

The control unit 12 is connected to the secondary filtering unit. In the case where the second adapter 10 operates in the first charging mode, the control unit 12 controls the secondary filtering unit to operate such that the second adapter 10 outputs a constant direct current and operates in the second adapter. In the case of the second charging mode, the control unit 12 controls the secondary filtering unit to stop operating, so that the second adapter 10 outputs alternating current or pulsating direct current.

Optionally, in some embodiments, the first charging mode may be a constant voltage mode.

Optionally, in some embodiments, the foregoing second charging mode may be a constant current mode.

The second adapter of the embodiment of the invention can reduce the lithium deposition phenomenon of the battery when outputting alternating current or pulsating direct current to charge the battery, reduce the probability and intensity of the arcing of the contact of the charging interface, and improve the life of the charging interface. The second adapter of the inventive embodiment is also capable of flexible switching between different charging modes.

As indicated above, the second adapter can output alternating current or pulsating direct current (that is, the current of the pulsating waveform) in the second charging mode, where the pulsating waveform can be a complete pulsating waveform or a complete pulsating waveform can be cut. The pulsation waveform obtained after peak processing. 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 when the second adapter 10 operates in the first charging mode, the secondary filtering unit operates normally, and the primary coupled to the secondary current of the power conversion unit 11 is rectified and subjected to filtering by the secondary filtering unit, and then A constant direct current (or a current with a stable current value) is output. When the second adapter 10 is operating in the second charging mode, the secondary filtering unit stops operating. In some embodiments, the current of the primary coupling of the power conversion unit 11 to the secondary may be directly output or output after simple processing. The output current of the second adapter 10 may be an alternating current. In other embodiments, the current coupled to the secondary of the power conversion unit 11 may be rectified, and then the rectified current is simply processed and output. The output current of the second adapter 10 is a pulsating direct current.

The second adapter 10 of the embodiment of the present invention can charge a device to be charged, such as a terminal. 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 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, but the type of the charging interface is not specifically limited in the embodiment of the present invention, for example, may be a Universal Serial Bus (USB) interface, the USB interface. It can be a standard USB interface, a micro USB interface, or a Type-C interface.

In some embodiments, the control unit 12 can also control the charging procedure to increase the level of intelligence of the second adapter. Specifically, the control unit 12 can be configured to perform bidirectional communication with a device to be charged (such as a terminal) to obtain an instruction or status information of a device to be charged (such as a terminal) (such as a current voltage of a battery of a device to be charged (such as a terminal), to be The temperature of the charging device (such as a terminal), etc., thereby controlling the charging procedure of the second adapter based on an instruction or status signal of the device to be charged (such as a terminal). Further, in some embodiments, the control unit 12 may be a Microcontroller Unit (MCU), but the embodiment of the present invention is not limited thereto, and the control unit 12 may also be other types of chips or circuits.

Optionally, in some embodiments, the capacitance in the secondary filtering unit is a solid capacitor. It should be understood that the number of the solid capacitors may be one or plural.

Further, the secondary filtering unit may include a plurality of solid capacitors, and the plurality of solid capacitors may be connected to the secondary bus of the second adapter and the ground. Taking Figure 3 as an example, the secondary filtering unit can include four solid capacitors that are connected in parallel. It should be understood that the secondary filtering unit in FIG. 3 is only a specific example, and the number of the solid capacitors included in the secondary filtering unit may also be other values, which is not limited in the embodiment of the present invention. In the case where the total capacity of the capacitors in the secondary filtering unit is constant, by using a plurality of small capacitors in parallel, the equivalent resistance and the equivalent inductance of the capacitor can be effectively reduced, so that the direct current output from the secondary filtering unit is more stable.

In addition, the capacity and/or the number of capacitors in the secondary filtering unit may be determined based on a maximum current allowed by the second adapter in the first charging mode. In the first charging mode, if it is desired to increase the second adapter to allow output The maximum current can increase the capacity and/or the number of capacitors in the secondary filtering unit.

Optionally, in some embodiments, the VBUS terminal of the second adapter may also be connected with some ceramic capacitors to filter out the output voltage of the second adapter and the clutter in the output current.

As shown in FIG. 4, the control unit 12 can be connected to the secondary filtering unit through the MOS transistor. In FIG. 4, the gate of the MOS transistor is connected to the control unit 12, and the source of the MOS transistor is grounded, and the MOS is The drain of the crystal is connected to one end of the capacitor in the secondary filter unit. The control unit 12 can control the on and off of the MOS transistor by outputting a PWM signal. For example, when the PWM signal is high potential, the source and the drain of the MOS transistor are turned on, and the secondary filter unit is in operation. When the PWM signal is When the low potential is on time, the source and the drain of the MOS transistor are not turned on, and the secondary filter unit is in a stopped state.

It should be understood that the control unit 12 in the embodiment of the present invention can also control the on and off of the MOS transistor by other types of signals than the PWM signal. The above MOS transistor may be an N-channel enhancement type MOS transistor, or may be another type of MOS transistor. In addition, the control unit 12 can also use other devices that can function as a switch to control whether the secondary filtering unit operates. This embodiment of the present invention does not limit this.

Optionally, in some embodiments, the second adapter 10 can support a first charging mode and a second charging mode. The second adapter 10 charges the charging device (such as the terminal) in a second charging mode faster than the charging speed of the second adapter 10 in a first charging mode to a device to be charged (such as a terminal). 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 a charging device (such as a terminal) to the device to be charged. a first instruction, the first instruction is used to ask whether a device to be charged (such as a terminal) turns on the 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 command is used to indicate Whether the device to be charged (such as a terminal) agrees to turn on the second charging mode; in the case that the device to be charged (such as a 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 a 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. The master device can make a second response to the first response or the first reply of the slave device, that is, the negotiation procedure of the one charging mode is completed between the master and the slave device. 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 of 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, the second adapter (or the second adapter) can be considered as no need to make a targeted second response to the first response or the first response of the second adapter by the charging device (such as the terminal). 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 (or the peak value of the 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, 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 command to the device to be charged (such as the 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 receives the device to be charged (eg The terminal sends a reply command of a second instruction, 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 may mean that the current output voltage of the second adapter (or the peak value of the current output voltage) is slightly higher than the current voltage of the battery, and the difference between the output voltage of the second adapter (or the peak value of the current output voltage) and the current voltage of the battery Within the preset range (usually on the order of a few 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 for charging a device to be charged (eg, a terminal) output by the second adapter in the second charging mode; and output current to the second adapter by the control unit (or a second adapter) The peak value of the output current is adjusted such that the output current of the second adapter (or the peak value of the output current of the second adapter) is equal to the charging current for charging the device to be charged 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 the 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 a third command sent by the device to be charged (such as the terminal) The reply command of the third instruction is used to indicate the maximum charging current currently supported by the device to be charged (such as the terminal); 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 second adapter outputs a charging current 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 ( Or the peak value of the charging current), after considering factors such as the maximum charging current currently supported by the device to be charged (such as the terminal) and its own current output capability, the second adapter output in the second charging mode is determined for treatment. A charging device (such as a terminal) charges the 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, in the program 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 output current of the second adapter.

Specifically, the two-way communication between the control unit and the device to be charged (such as the terminal) to adjust the output current of the second adapter 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 current voltage of the battery of the device to be charged (such as the terminal); the control unit receives a reply command of a 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 , adjust the output current of the second adapter.

Optionally, in some embodiments, as shown in FIG. 5A, the second adapter 10 includes a charging interface 51. Further, in some embodiments, the control unit in the second adapter 10 can communicate bidirectionally with the device to be charged (such as a terminal) through the data line 52 in the charging interface 51.

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 current voltage of the battery of the charging device (such as the terminal); the control unit receives a reply command of a 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 battery of the device to be charged (such as the terminal) The current 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. 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 a 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., the terminal) will be described in more detail below in conjunction with FIG. 5B. It should be noted that the example of FIG. 5B 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 accordance with the example of FIG. 5B, and such modifications or variations are also within the scope of the embodiments of the present invention.

As shown in FIG. 5B, the charging procedure of the second adapter to the charging device (such as the terminal) in the second charging mode, that is, the charging procedure, may 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 instruction 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 (such as 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 a terminal) sends a reply command of instruction 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 instruction 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 (such as the terminal), and whether it is necessary to reduce the output current of the second adapter. 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 a terminal) sends the reply command of the instruction 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 a device to be charged (such as a terminal) in the second charging mode to the control unit to be the second The time it takes for the adapter's output voltage to adjust to the proper 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 A reply command of instruction 2 can be sent to the control unit (eg, the terminal) to indicate that the output voltage of the second adapter matches the battery voltage of the device to be charged (eg, 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", it can be considered that the charging interface is in poor contact, and the second adapter stops charging in the second charging mode. The device (such as a terminal) is charged.

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

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

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 device to be charged (such as the terminal) does not agree that the second adapter charges a device to be charged (such as a 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 (such as the terminal) agrees that the second adapter charges a device to be charged (such as a terminal) in the second charging mode to resume the charging process. 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 the terminal) does not agree that the second adapter charges a device to be charged (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 a device to be charged (such as a 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 Figure 5B 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 charging device (such as a terminal) receives a reply command from the control unit to instruct the control unit to agree that the second adapter charges a device to be charged (such as a terminal) in the second charging mode, the second adapter starts in the second charging mode. The battery of a device to be charged (such as a 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.

Optionally, in some embodiments, the second adapter loads the output current of the second adapter 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.

Optionally, in some embodiments, in the second charging mode, the output current of the second adapter is a pulsating direct current (or a unidirectional pulsating output current, or a pulsating waveform current, or a sinusoidal current), The waveform of the pulsating direct current is shown in Fig. 6.

Optionally, in some embodiments, in a case where the output current of the second adapter is a pulsating direct current, the constant current mode may refer to a charging mode that controls a peak or a mean value of the pulsating direct current, that is, controls an output current of the second adapter. The peak value does not exceed the current corresponding to the constant current mode, as shown in Figure 7.

Optionally, in some embodiments, in the second charging mode, the output current of the second adapter is an alternating current, and the alternating current can also reduce the lithium deposition phenomenon of the lithium battery and improve the service life of the battery.

The device embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 7. The following describes the method embodiment of the embodiment of the present invention in detail with reference to FIG. 8. It should be understood that the description of the method side and the description of the device side are mutually related. Correspondingly, for the sake of brevity, repeated descriptions are omitted as appropriate.

Fig. 8 is a schematic flow chart of a charging control method according to an embodiment of the present invention. The method of FIG. 8 may be performed by the second adapter above, as may be the second adapter described in FIGS. 1 to 7, in particular, the second adapter includes a power conversion unit, the power conversion unit The utility model is configured to convert the input alternating current to obtain an output voltage and an output current of a second adapter, and the power conversion unit comprises a primary filtering unit.

The method of Figure 8 includes the following actions.

810. When the second adapter operates in the first charging mode, control the secondary filtering unit of the second adapter to operate, such that the second adapter outputs a constant direct current.

820. If the second adapter operates in the second charging mode, control the secondary filtering unit to stop working, so that the second adapter outputs alternating current or pulsating direct current.

Optionally, in some embodiments, the capacitance in the secondary filtering unit is a solid capacitor.

Optionally, in some embodiments, the secondary filtering unit includes a plurality of solid capacitors connected to the secondary bus and ground of the second adapter.

Optionally, in some embodiments, the second adapter charges the device to be charged in the second charging mode faster than the charging device in the first charging mode. The method of FIG. 8 may further include: performing bidirectional communication with the device to be charged in the program 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 comprises: 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 a charging mode between the second adapter and the device to be charged includes: 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; receive a reply command of the first instruction sent by the device to be charged, and the reply command of the first instruction is used to indicate whether the device to be charged agrees Turning on the second charging mode; and using the second charging mode to charge the device to be charged 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 comprises: 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 device is in two-way communication with the device to be charged to determine a charging voltage output by the second adapter for charging the device to be charged in the second charging mode, including Sending a second command to the device to be charged, the second command is used to query whether the output voltage of the second adapter matches the current voltage of a battery of the device to be charged; and receive the second signal sent by the device to be charged The reply instruction of the instruction, the reply instruction of the second instruction is used to indicate that the output voltage of the second adapter matches, is higher or lower than the current voltage of the battery.

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 comprises: performing two-way 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 an output current of the second adapter, so that an output current of the second adapter 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 device is in two-way communication with the device to be charged to determine a charging current output by the second adapter for charging the device to be charged in the second charging mode, including Transmitting, to the device to be charged, a third command for inquiring about a maximum charging current currently supported by the device to be charged; 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 comprises: charging using the second charging mode In the program, two-way communication is performed with the device to be charged to adjust the output current of the second adapter.

Optionally, in some embodiments, the two-way communication with the device to be charged to adjust the output current of the second adapter includes: a fourth command sent to the device to be charged, the fourth command is used for Querying a current voltage of a 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, Adjust the output current of the second adapter.

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

Optionally, in some embodiments, in the second charging mode, the output current of the second adapter is pulsed direct current.

Optionally, in some embodiments, in the second charging mode, the output current of the second adapter is alternating current.

Optionally, in some embodiments, in the second charging mode, the output voltage and the output current of the second adapter are directly loaded on both ends of a battery of the device to be charged, and the battery is directly charged.

Optionally, in some embodiments, the second adapter includes a control unit for controlling the charging program, the control unit being a micro control unit MCU.

Optionally, in some embodiments, the second adapter includes a charging interface, and the charging interface is a universal serial bus 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 scope of the claims.

10‧‧‧Adapter
11‧‧‧Power Conversion Unit
12‧‧‧Control unit
51‧‧‧Charging interface
52‧‧‧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. 5A 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. FIG. 5B is a schematic diagram of a fast charge communication program according to an embodiment of the present invention. Figure 6 is a schematic diagram of the current waveform of the pulsating direct current. Fig. 7 is a view showing the pulsating direct current in the constant current mode of the embodiment of the present invention. Figure 8 is a schematic flow chart of a charging control method according to an embodiment of the present invention.

10‧‧‧Adapter

11‧‧‧Power Conversion Unit

12‧‧‧Control unit

Claims (36)

An adapter supporting a first charging mode and a second charging mode, wherein the adapter comprises: a power conversion unit for converting an input alternating current to obtain an output voltage and an output current of the adapter The power conversion unit includes a primary filtering unit; a control unit is coupled to the secondary filtering unit, and the control unit controls the secondary filtering unit to operate when the adapter operates in the first charging mode The adapter outputs a constant direct current. When the adapter operates in the second charging mode, the control unit controls the secondary filtering unit to stop operating, so that the adapter outputs alternating current or pulsating direct current. The adapter of claim 1, wherein the capacitor in the secondary filtering unit is a solid capacitor. The adapter of claim 2, wherein the secondary filtering unit comprises a plurality of solid capacitors connected to the secondary bus and the ground of the adapter. The adapter of any one of claims 1 to 3, wherein the adapter charges the device to be charged faster than the adapter in the first charging mode in the second charging mode. The charging speed of the device to be charged in the mode, in the program connected between the adapter and the device to be charged, 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 4, 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 Two-way communication with the device to be charged to negotiate a charging mode between the adapter and the device to be charged. The adapter of claim 5, 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 The charging device sends a first command for inquiring whether the device to be charged turns on the second charging mode; the control unit receives a reply command of the first command sent by the device to be charged, the first command The reply command is used to indicate whether the device to be charged agrees to enable 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 according to any one of claims 4 to 6, wherein 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 program includes: the control unit performs two-way communication with the device to be charged to determine a charging voltage output by the adapter for charging the device to be charged in the second charging mode; the control unit is the adapter The output voltage is adjusted such that the 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 adapter of claim 7, wherein the control unit performs bidirectional communication with the device to be charged to determine the output of the adapter in the second charging mode for the device to be charged. The charged charging voltage includes: the control unit sends a second command to the to-be-charged device, 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; the control unit Receiving a reply instruction of the second instruction sent by the device to be charged, 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 according to any one of claims 4 to 8, 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. The program includes: the control unit performs two-way communication with the device to be charged to determine a charging current output by the adapter for charging the device to be charged in the second charging mode; the control unit is the adapter The output current is adjusted such that the output current of the adapter 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 9 is characterized in that the control unit performs two-way communication with the device to be charged to determine the output of the adapter in the second charging mode for the device to be charged. The charging current of the charging includes: the control unit sends a third command to the to-be-charged device, 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 a reply instruction of the third instruction, the reply instruction of the third instruction is used to indicate a maximum charging current currently supported by the device to be charged; the control unit determines, according to the maximum charging current currently supported by the device to be charged, in the second charging mode The adapter outputs a charging current for charging the device to be charged. The adapter according to any one of claims 4 to 10, characterized in that the control unit performs two-way communication with the device to be charged to control the output of the adapter in the second charging mode. The program includes: in a program for charging using the second charging mode, the control unit performs bidirectional communication with the device to be charged to adjust an output current of the adapter. The adapter of claim 11, wherein the control unit performs bidirectional communication with the device to be charged to adjust an output current of the adapter, and includes: a first unit sent by the control unit to the device to be charged a fourth command for inquiring about a current voltage of a 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 Current voltage; The control unit adjusts the output current of the adapter according to the current voltage of the battery. The adapter of any one of claims 4 to 12, 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 any one of claims 1 to 13, wherein in the second charging mode, the output current of the adapter is pulsating direct current. The adapter according to any one of claims 1 to 13, wherein in the second charging mode, an output current of the adapter is an alternating current. The adapter according to any one of claims 1 to 15, wherein in the second charging mode, an output voltage and an output current of the adapter are directly loaded in the device to be charged. Both ends of the battery are directly charged for the battery. The adapter of any one of claims 1 to 16, wherein the control unit is a micro control unit MCU. The adapter of any one of clauses 1 to 17, wherein the adapter comprises a charging interface, and the charging interface is a universal serial bus USB interface. A charging control method, characterized in that the method is applied to an adapter, 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 power conversion The unit includes a primary filtering unit, the method comprising: controlling the secondary filtering unit of the adapter to operate such that the adapter outputs a constant direct current when the adapter operates in the first charging mode; operating the second charging mode in the adapter In case, the secondary filtering unit is controlled to stop working, so that the adapter outputs alternating current or pulsating direct current. The method of claim 19, wherein the capacitor in the secondary filtering unit is a solid capacitor. The method of claim 20, wherein the secondary filtering unit comprises a plurality of solid capacitors connected to the secondary bus and the ground of the adapter. The method of any one of claims 19 to 21, wherein the adapter charges the device to be charged faster than the adapter in the first charging mode in the second charging mode. The charging speed of the device to be charged in the mode, the method further comprising: performing bidirectional communication with the device to be charged in the program connected to the device to be charged to control the adapter in the second charging mode Output. The method of claim 22, 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 method of claim 23, 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 comprises: transmitting one 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 waiting Whether the charging device agrees to turn on the second charging mode; and in the case that the to-be-charged device agrees to turn on the second charging mode, the second charging mode is used to charge the device to be charged. The method of any one of claims 22 to 24, characterized in that the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode is The method includes: performing two-way communication with the device to be charged 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 to enable the The 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 method of claim 25, wherein the device to be charged performs two-way communication to determine 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 for inquiring whether an output voltage of the adapter matches a current voltage of a battery of the device to be charged; receiving the A reply instruction of the second instruction, 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 method of any one of claims 22 to 26, characterized in that the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode is The method includes: performing two-way communication with the device to be charged to determine a charging current output by the adapter for charging the device to be charged in the second charging mode; adjusting an output current of the adapter to enable the The output current of the adapter is equal to the charging current output by the adapter in the second charging mode for charging the device to be charged. The method of claim 27, wherein the device to be charged performs two-way communication to determine the 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 the 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 for charging the to-be-charged device The charging current that the device is charging. The method of any one of claims 22 to 28, characterized in that the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode is The method includes: in a program for charging using the second charging mode, performing bidirectional communication with the device to be charged to adjust an output current of the adapter. The method of claim 29, wherein the two-way communication with the device to be charged to adjust the output current of the adapter includes: a fourth command sent to the device to be charged, the first The fourth command is used to query the current voltage of a 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 the current voltage of the battery; according to the current current of the battery Voltage, adjust the output current of the adapter. The method of any one of claims 22 to 30, wherein the adapter comprises a charging interface, and the control unit performs two-way communication with the device to be charged through a data line in the charging interface. . The method of any one of claims 19 to 31, wherein in the second charging mode, the output current of the adapter is pulsating direct current. The method of any one of claims 19 to 31, wherein in the second charging mode, the output current of the adapter is an alternating current. The method of any one of claims 19 to 33, wherein in the second charging mode, the output voltage and the output current of the adapter are directly loaded in the device to be charged Both ends of the battery are directly charged for the battery. The method of any one of claims 19 to 34, wherein the adapter comprises a control unit for controlling the charging program, the control unit being a micro control unit MCU. The method of any one of claims 19 to 35, wherein the adapter comprises a charging interface, and the charging interface is a universal serial bus USB interface.