TWI658675B - Adapter and charging control method - Google Patents

Abstract

An embodiment of the present invention provides an adapter and a charging control method. The adapter includes a power conversion unit for converting an input AC power to obtain an output voltage and an output current of the adapter. The power conversion unit includes a primary filtering unit; a control unit Connected to the secondary filter unit. When the adapter works in the first charging mode, the control unit controls the secondary filter unit to work, so that the adapter outputs constant DC power. When the adapter works in the second charging mode, the control unit controls The secondary filtering unit stops working, so that the adapter outputs AC power or pulsating DC power. The adapter provided by the embodiment of the present invention can reduce the lithium precipitation phenomenon of the battery and improve 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 a charging control method.

The adapter is also called a power adapter and is used to charge a device (such as a terminal) to be charged. At present, adapters on the market usually use a constant voltage to charge a device to be charged (such as a terminal). Since the battery in the device to be charged is generally a lithium battery, using a constant voltage to charge the device to be charged tends to cause the phenomenon of lithium evolution, resulting in a reduction in the battery life.

The embodiments of the present invention provide an adapter and a charging control method, so as to reduce the lithium precipitation phenomenon of the battery and improve the service life of the battery.

According to a first aspect, an adapter is provided. The adapter supports a first charging mode and a second charging mode. The adapter includes a power conversion unit for converting an input AC power to obtain an output voltage and an output current of the adapter. The power conversion unit includes a primary filtering unit; a control unit connected to the secondary filtering unit; and when the adapter works in the first charging mode, the control unit controls the secondary filtering unit to work so that the adapter It outputs constant DC power. When the adapter works in the second charging mode, the control unit controls the secondary filtering unit to stop working, so that the adapter outputs AC power or pulsating DC power.

In a second aspect, a charging control method is provided. The method is applied to an adapter. The adapter includes a power conversion unit for converting the input AC power to obtain the output voltage and output current of the adapter. The conversion unit includes a primary filtering unit, and the method includes: controlling the secondary filtering unit of the adapter to work when the adapter works in the first charging mode, so that the adapter outputs a constant DC power; and the adapter works on the second charging In the case of the mode, the secondary filtering unit is controlled to stop working, so that the adapter outputs AC power or pulsating DC power.

When the adapter of the embodiment of the present invention outputs AC power or pulsating DC power to charge the battery, it can reduce the lithium precipitation phenomenon of the battery, reduce the probability and strength of arcing of the contacts of the charging interface, and improve the life of the charging interface. In addition, the invention implements The example adapter can also flexibly switch between different charging modes.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person having ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A related art mentions a first adapter for charging a device to be charged (such as a terminal). The first adapter works 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 to be directly loaded to both ends of the battery, but needs to be converted by a conversion circuit in the device to be charged (such as a terminal) to obtain the expected value of the battery in the device to be charged (such as a terminal). Charging voltage and / or charging current.

The conversion circuit is used to convert the voltage output by the first adapter to meet the expected charging voltage and / or charging current requirements of the battery.

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

For example, the battery charging procedure may include one or more of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase. In the trickle charging stage, the conversion circuit can use a current feedback loop so that the current entering the battery during the trickle charging stage meets the expected charging current of the battery (such as the first charging current). In the constant current charging phase, the conversion circuit can use a current feedback loop to make the current entering the battery during the constant current charging phase meet the expected charging current of the battery (for example, the second charging current, which can be greater than the first charging current) . In the constant-voltage charging phase, the conversion circuit can use a voltage feedback loop to make the voltage loaded across the battery during the constant-voltage charging phase meet the expected charging voltage of the battery.

As an example, when the voltage output by the first adapter is greater than the expected charging voltage of the battery, the conversion circuit may 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 voltage. Charging voltage requirements. As yet another example, when the voltage output by the first adapter is less than the expected charging voltage of the battery, the conversion circuit may be used to perform boost processing on the voltage output by the first adapter so that the charging voltage obtained after boost conversion meets the requirements of the battery. Expected charging voltage requirements.

As yet another example, taking the first adapter outputting a constant voltage of 5V as an example, when the battery includes a single battery cell (taking a lithium battery cell as an example, the charging cut-off voltage of a single battery cell is 4.2V), the conversion circuit (such as Buck The step-down circuit) can perform a step-down process on the voltage output by the first adapter, so that the charging voltage obtained after the step-down can meet the expected charging voltage requirement of the battery.

As another example, take the first adapter to output a constant voltage of 5V as an example. When the first adapter is a battery with two or more single cells connected in series (take a lithium battery cell as an example, the charge cut-off voltage of a single cell) When charging at 4.2V, a conversion circuit (such as a Boost boost circuit) can boost the voltage output by the first adapter so that the charging voltage obtained after the boost can meet the expected charging voltage requirement of the battery.

The conversion circuit is limited by the low conversion efficiency of the circuit, which causes the electrical energy of the unconverted part to be lost in the form of heat. This part of the heat will be focused inside the device to be charged (such as a terminal). The design space and heat dissipation space of the device to be charged (such as a terminal) are small (for example, the physical size of the mobile terminal used by users is becoming thinner and thinner, and a large number of electronic components are densely arranged in the mobile terminal to improve the mobile terminal ’s Performance), which not only increases the difficulty of designing the conversion circuit, but also causes the heat that is focused in the device to be charged (such as a terminal) to be removed in a timely manner, thereby causing an abnormality in 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 the electronic components to malfunction. As another example, the heat accumulated on the conversion circuit may shorten the service life of the conversion circuit and nearby electronic components. For another example, the heat accumulated on the conversion circuit may cause thermal interference to the battery, which may cause abnormal charging and discharging of the battery. Another example is that the heat accumulated on the conversion circuit may cause the temperature of the device to be charged (such as a terminal) to rise, affecting the user's experience during charging. For another example, the heat accumulated on the conversion circuit may cause a short circuit in the conversion circuit itself, so that the voltage output by the first adapter is directly loaded at both ends of the battery, causing an abnormal charging. If the battery is in an overvoltage charging state for a long time, it may even Causes the battery to explode, endangering user safety.

An embodiment of the present invention provides a second adapter with adjustable output voltage. The second adapter can obtain the status information of the battery. The battery status information may include current battery power information and / or voltage information. The second adapter can adjust the output voltage of the second adapter itself according to the obtained status information of the battery, so as to meet the expected charging voltage and / or charging current requirements of the battery. Further, in the constant current charging stage of the battery charging process, the voltage output by the second adapter after adjustment can be directly loaded at both ends of the battery to charge the battery.

The second adapter may have a function of a voltage feedback module and a function of a current feedback module, so as to implement management of a charging voltage and / or a charging current of a battery.

The adjustment of the output voltage of the second adapter by the second adapter according to the obtained battery status information may refer to: the second adapter can obtain the status information of the battery in real time, and according to the obtained instant status information of the battery each time To adjust the voltage output by the second adapter itself 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 battery status information obtained in real time. The second adapter can obtain the current status of the battery at different times in the charging program as the battery voltage in the charging program continues to rise. The state information, and according to the current state information of the battery, the output voltage of the second adapter itself is adjusted in real time to meet the expected charging voltage and / or charging current requirements of the battery.

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

For the trickle charging stage and the constant voltage charging stage, the voltage output by the second adapter can be processed in a manner similar to that of the first adapter, that is, transformed by the conversion circuit in the device to be charged (such as a terminal) to obtain the device to be charged (such as Terminal) the expected charging voltage and / or charging current of the battery.

FIG. 1 is a schematic structural diagram of a second adapter according to an embodiment of the present invention. The second adapter 10 in FIG. 1 includes a power conversion unit 11 and a control unit 12.

The power conversion unit 11 is configured to convert the input AC power to obtain an output voltage and an output current of a second adapter 10. The power conversion unit 11 includes a primary filtering unit;

The control unit 12 is connected to the secondary filter unit. When the second adapter 10 works in the first charging mode, the control unit 12 controls the secondary filter unit to work so that the second adapter 10 outputs a constant DC power. In the case of the second charging mode, the control unit 12 controls the secondary filtering unit to stop working, so that the second adapter 10 outputs AC power or pulsating DC power.

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

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

When the second adapter of the embodiment of the present invention outputs AC power or pulsating DC power to charge the battery, it can reduce the lithium precipitation phenomenon of the battery, reduce the probability and strength of arcing of the contacts on the charging interface, and improve the life of the charging interface. The second adapter of the embodiment of the invention can also flexibly switch between different charging modes.

It was pointed out above that the second adapter can output AC power or pulsating DC power (that is, the current of the pulsating waveform) in the second charging mode. The pulsating waveform here can be a complete pulsating waveform, or the complete pulsating waveform can be cut. Pulse waveform obtained after peak processing. The so-called peak clipping processing refers to filtering out a part of the pulsation waveform that exceeds a certain threshold value, so as to control the peak value of the pulsation waveform. In the embodiment shown in FIG. 2A, the pulsation waveform is a complete pulsation waveform. 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 works in the first charging mode, the secondary filtering unit works normally, and the current coupled from the primary to the secondary of the power conversion unit 11 undergoes filtering processing by the secondary filtering unit after rectification, and then Output constant DC current (or current with stable current value). When the second adapter 10 works in the second charging mode, the secondary filtering unit stops working. In some embodiments, the primary coupling of the power conversion unit 11 to the secondary can be directly output or output after simple processing. The output current of the second adapter 10 may be alternating current. In other embodiments, the primary-to-secondary current of the power conversion unit 11 may be rectified, and then the rectified current is output after simple processing. At this time, The output current of the second adapter 10 is a pulsating DC power.

The second adapter 10 of the embodiment of the present invention can charge a device (such as a terminal) to be charged. 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 wired line (such as 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 (e.g., for cellular networks, wireless LANs) (wireless local area network (WLAN), digital TV networks such as digital video broadcasting handheld (DVB-H) networks, satellite networks, amplitude modulation-frequency modulation (AM-FM) Broadcast transmitter, and / or a device for receiving / transmitting communication signals through a wireless interface of another communication terminal. A communication terminal configured to communicate through a wireless interface may be referred to as a “wireless communication terminal”, a “wireless terminal”, and / or a “mobile terminal”. Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; and can include radiotelephones, pagers, Personal Digital Assistant (PDA) for Internet / Intranet access, Web browser, notepad, calendar, and / or global positioning system (GPS) receiver; and regular laptop And / or a palm-type receiver or other electronic device including a radiotelephone transceiver.

In some embodiments, the second adapter 10 may include a charging interface, but the embodiment of the present invention does not specifically limit the type of the charging interface. For example, it 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 may also control the charging process to improve the intelligence of the second adapter. Specifically, the control unit 12 may be configured to perform two-way communication with a device to be charged (such as a terminal), so as to obtain an instruction or status information of the device (such as a terminal) to be charged (such as a current voltage of a battery of the device to be charged (such as a terminal), a battery The temperature of the charging device (such as a terminal), etc., so as to control the charging procedure of the second adapter based on the 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 embodiments of the present invention are not limited thereto, and the control unit 12 may also be other types of chips or circuits.

Optionally, in some embodiments, the capacitor 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 above-mentioned secondary filtering unit may include a plurality of solid capacitors, and the plurality of solid capacitors may be connected to the secondary bus and the ground of the second adapter. Taking Figure 3 as an example, the secondary filtering unit may include 4 solid capacitors, and the 4 solid capacitors 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 solid capacitors included in the secondary filtering unit may also be another value, which is not limited in the embodiment of the present invention. When the total capacity of the capacitors in the secondary filtering unit is constant, by using small capacitors in parallel, the equivalent resistance and equivalent inductance of the capacitor can be effectively reduced, and the DC power output by the secondary filtering unit is more stable.

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

Optionally, in some embodiments, a ceramic capacitor may be connected to the VBUS end of the second adapter to filter out the clutter in the output voltage and output current of the second adapter.

As shown in Figure 4, the control unit 12 can be connected to the secondary filtering unit through a MOS transistor. In Figure 4, the gate of the MOS transistor is connected to the control unit 12, the source of the MOS transistor is grounded, and the MOS transistor is grounded. The drain of the crystal is connected to one end of a capacitor in the secondary filtering unit. The control unit 12 can control the on / off of the MOS transistor by outputting a PWM signal. For example, when the PWM signal is at a high potential, the source and the drain of the MOS transistor are turned on, and the secondary filter unit is in a working state. When the PWM signal is When the low potential is on time, the source and 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 may also control the on-off of the MOS transistor by using other types of signals besides the PWM signal. The 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 may also use other devices capable of acting as a switch to control whether the secondary filtering unit works, which is not limited in the embodiment of the present invention.

Optionally, in some embodiments, the second adapter 10 may support a first charging mode and a second charging mode. In the second charging mode, the second adapter 10 charges a device (such as a terminal) to be charged faster than the second adapter 10 charges a device (such as a terminal) in the first charging mode. In other words, compared to the second adapter 10 working in the first charging mode, the second adapter 10 working in the second charging mode is full of battery consumption in a device (such as a terminal) to be charged with the same capacity. Time is shorter.

The second adapter 10 includes a control unit. In a program in which the second adapter 10 is connected to the device to be charged (such as a terminal), the control unit performs two-way communication with the device to be charged (such as a terminal) to control the charging procedure in the second charging mode. . The control unit may be the control unit in any of the foregoing embodiments. For example, the control unit may be the control unit in the first adjustment unit or the 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. This ordinary charging mode refers to the second adapter outputting a relatively small current value (usually less than 2.5A) or charging the battery in a charging device (such as a terminal) with a relatively small power (usually less than 15W). In charging mode, it takes a few hours to fully charge a large-capacity battery (such as a 3000mAh battery). In fast charging mode, the second adapter can output a relatively large current ( It is usually greater than 2.5A, such as 4.5A, 5A or even higher) or charging the battery in a charging device (such as a terminal) with a relatively large power (usually greater than or equal to 15W), compared to the ordinary charging mode, The charging time required for the second adapter to fully charge a battery of the same capacity 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 between the control unit of the second adapter and the device to be charged (such as a terminal), and the control mode of the output of the second adapter in the second charging mode by the control unit. For example, the control unit may Communicate with the 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 current of the second adapter based on the current voltage or current of the battery. The communication content between the control unit and the device to be charged (such as a terminal) and the control mode of the output of the second adapter in the second charging mode by the control unit are described in detail below with reference to specific embodiments.

Optionally, in some embodiments, the program for the control unit to perform bidirectional communication with the device to be charged (such as a 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 ( (Such as a terminal) to perform 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 adopt the second charging mode for fast charging of a device to be charged (such as a terminal), but performs two-way communication with the device to be charged (such as a terminal) to negotiate whether the second adapter can adopt the first The two charging modes perform fast charging on charging devices (such as terminals), which can improve the safety of the charging process.

Specifically, the control unit performs two-way communication with the device to be charged (such as a terminal) to negotiate a charging mode between the second adapter and the device to be charged (such as a terminal) may include: the control unit sends a A first instruction, the first instruction is used to query whether a device to be charged (such as a terminal) turns on the second charging mode; the control unit receives a response instruction to the first instruction sent by the device to be charged (such as a terminal), and the response instruction is used to instruct Whether the device to be charged (such as a terminal) agrees to enable the second charging mode; and when the device to be charged (such as a terminal) agrees to enable the second charging mode, the control unit uses the second charging mode to charge the device (such as a terminal) to be charged.

The above description of the embodiment of the present invention does not limit the master-slave nature of the second adapter (or the control unit of the second adapter) and the device to be charged (such as a terminal). In other words, the control unit and the device to be charged (such as Any one of the terminals can initiate a two-way communication session as the master device, and accordingly the other party can act as a slave device to make a first response or a first reply to the communication initiated by the master device. As a feasible method, in the communication program, the identity of the master and slave devices can be confirmed by comparing the potential levels of the second adapter side and the side of the device to be charged (such as a terminal) with respect 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 a 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 (such as a terminal) as the master device, and accordingly the other party as the slave device makes a first response or a first reply to the communication session initiated by the master device. The master device side can make a second response to the first response or the first reply of the slave device side, that is, it can be considered that the negotiation process of the charging mode between the master device and the slave device is completed. As a feasible implementation mode, the master and slave devices can perform the charging operation between the master and slave devices after the negotiation of multiple charging modes is completed to ensure that the negotiated charging procedure is safely and reliably performed. carried out.

One way that the master device can respond to the first response or the first response of the slave device to the communication session may be: the master device can receive the first response made by the slave device to the communication session. A response or a first reply, and make a targeted second response based on the received first response or the first reply of the slave device. As an example, when the master device side receives the first response or the first reply of the slave device to the communication session within a preset time, the master device side will respond to the first response or the first reply of the slave device. The second response is as follows: the master device and the slave device have completed a negotiation of the charging mode, and the master device and the slave device perform a charging operation according to the negotiation result according to the first charging mode or the second charging mode, that is, The second adapter works in the first charging mode or the second charging mode to charge the device (such as a terminal) to be charged according to the negotiation result.

One way that the master device side can make a further second response based on the first response or the first response of the slave device side to the communication session may also be that the master device side does not receive the slave device within a preset time Party ’s first response or first response to the communication session, the master device side will also make a targeted second response to the slave ’s first response or first response. As an example, when the master device side does not receive the first response or the first reply of the slave device to the communication session within the preset time, the master device side will also do the first response or the first reply to the slave device. The targeted second response is specifically: the master device and the slave device have completed a negotiation of the charging mode, and the master device and the slave device perform the charging operation according to the first charging mode, that is, the second adapter works at the first Charge a device (such as a terminal) to be charged in a charging mode.

Optionally, in some embodiments, when the device to be charged (such as a terminal) initiates a communication session as a master device, the second adapter (or a control unit of the second adapter) as a slave device makes a communication session initiated by the master device side. After the first response or the first response, the second adapter (or the second adapter) can be regarded as the second adapter (or the second adapter) without the targeted second response of the second adapter or the first response by the device to be charged (such as a terminal). Control unit) and the device to be charged (such as a terminal) have completed the negotiation procedure of a charging mode, and the second adapter can determine whether the first charging mode or the second charging mode is the device to be charged (such as a terminal) according to the negotiation result. Charge it.

Optionally, in some embodiments, the program for the control unit to perform bidirectional communication with the device to be charged (such as a 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 (such as Terminal) to perform bidirectional communication to determine the charging voltage output by the second adapter in the second charging mode for charging a device to be charged (such as a terminal); the control unit adjusts the output voltage of the second adapter so that 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 a device to be charged (such as a terminal).

Specifically, the control unit performs bidirectional communication with the device to be charged (such as a terminal) to determine the charging voltage output by the second adapter in the second charging mode for charging the device to be charged (such as a terminal) may include: a control unit Send a second instruction to the device to be charged (such as a terminal). The second instruction is used to query whether the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (such as a terminal); the control unit receives the device to be charged (such as A terminal) sends a reply command of a second command, and the reply command of the second command is used to indicate that the output voltage of the second adapter matches the current voltage of the battery, is high or low. Alternatively, the second instruction may be used to inquire whether the current output voltage of the second adapter is suitable as the charging voltage output by the second adapter in the second charging mode for charging a device to be charged (such as a terminal). The command reply command can be used to indicate that the current output voltage of the second adapter 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 output by the second adapter in the second charging mode for charging a device to be charged (such as a terminal). Can refer to the current output voltage (or the peak value of 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 (or the peak value of the current output voltage) of the second adapter and the current voltage of the battery Within a preset range (usually on the order of hundreds of millivolts).

Optionally, in some embodiments, the control unit performs bidirectional communication with the device to be charged (such as a terminal) to control the charging procedure output by the second adapter in the second charging mode, which may include: the control unit and the device to be charged ( (Such as a terminal) to perform two-way communication to determine the charging current output by the second adapter in the second charging mode for charging the device to be charged (such as the terminal); the control unit outputs the second adapter (or the second adapter) The peak value of the output current of the second adapter is adjusted so 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 output by the second adapter in the second charging mode for charging the device to be charged .

Specifically, the control unit performs bidirectional communication with the device to be charged (such as a terminal) to determine the charging current output by the second adapter in the second charging mode for charging the device to be charged (such as a terminal) may include: a control unit Send a third instruction to the device to be charged (such as a terminal). The third instruction is used to query the maximum charging current currently supported by the device to be charged (such as a terminal); the control unit receives a third instruction sent by the device to be charged (such as a terminal) The reply instruction of the third instruction is used to indicate the maximum charging current currently supported by the device to be charged (such as a 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 a terminal). The charging current output by the second adapter for charging a device to be charged (such as a terminal). It should be understood that there are various ways for the control unit to determine the charging current output by the second adapter in the second charging mode for charging the device to be charged (eg, the terminal) according to the maximum charging current currently supported by the device to be charged (eg, the terminal). For example, the second adapter may determine the maximum charging current currently supported by the device to be charged (such as the terminal) as the charging current output by the second adapter in the second charging mode for charging the device to be charged (such as the terminal) ( 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 a terminal) and its own current output capability, the output of the second adapter in the second charging mode is determined for treatment. The charging current used by a charging device (such as a terminal) for charging.

Optionally, in some embodiments, the program for the control unit to perform bidirectional communication with the device to be charged (such as a terminal) to control the output of the second adapter in the second charging mode may include using the second adapter in the second adapter. In the charging mode, the control unit performs two-way communication with the device to be charged (such as a terminal) to adjust the output current of the second adapter.

Specifically, the control unit performs two-way communication with the device to be charged (such as a terminal) to adjust the output current of the second adapter may include: the control unit sends a fourth instruction to the device to be charged (such as a terminal), and the fourth instruction is used to query The current voltage of the battery of the device to be charged (such as a terminal); the control unit receives a reply instruction of a fourth instruction sent by the second adapter, the reply instruction of the fourth instruction is used to indicate the current voltage of the battery; 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 perform two-way communication with the device to be charged (such as a terminal) through the data line 52 in the charging interface 51.

Optionally, in some embodiments, a program in which the control unit performs two-way communication with the device to be charged (such as a 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 (such as Terminal) for two-way communication to determine if the charging interface is badly contacted.

Specifically, the control unit performs two-way communication with the device to be charged (such as a terminal) in order to determine whether the charging interface is in poor contact. The method may include: the control unit sends a fourth instruction to the device to be charged (such as a terminal). The current voltage of the battery of the charging device (such as the terminal); the control unit receives a reply instruction of a fourth instruction sent by the device to be charged (such as the terminal), and the reply instruction of the fourth instruction is used to indicate the battery of the device (such as the terminal) to be charged The current voltage of the control unit; the control unit determines whether the charging interface has a bad contact according to the output voltage of the second adapter and the current voltage of the battery of the device to be charged (such as a terminal). For example, if the control unit determines that the pressure difference between the output voltage of the second adapter and the current voltage of the device to be charged (such as a terminal) is greater than a preset voltage threshold, it indicates that the pressure difference at this time is divided by the current value output by the second adapter. The obtained impedance is greater than a preset impedance threshold, and the charging interface can be determined to have poor contact.

Optionally, in some embodiments, the poor contact of the charging interface may also be determined by the device to be charged (such as a terminal): the device to be charged (such as a terminal) sends a sixth instruction to the control unit, and the sixth instruction is used to query the second adapter The output voltage of the device to be charged (such as a terminal) receives a response instruction of the sixth instruction sent by the control unit. The response instruction of the sixth instruction is used to indicate the output voltage of the second adapter; The current voltage of the battery (such as a terminal) and the output voltage of a second adapter determine whether the charging interface is in poor contact. After the to-be-charged device (such as a terminal) determines that the charging interface has a poor contact, the to-be-charged device (such as a terminal) sends a fifth instruction to the control unit, and the fifth instruction is used to indicate that the charging interface has a 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 (such as a terminal) is described in more detail with reference to FIG. 5B. It should be noted that the example in FIG. 5B is only for helping those skilled in the art to understand 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 scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes according to the example shown in FIG. 5B, and such modifications or changes also fall within the scope of the embodiments of the present invention.

As shown in FIG. 5B, in the second charging mode, the output of the second adapter is a charging procedure of the device to be charged (such as a terminal), that is, the charging procedure may include five stages.

Phase 1: After the device to be charged (such as the terminal) is connected to the power supply device, the device to be charged (such as the terminal) can detect the type of the power supply device through the data lines D + and D-. When it is detected that the power supply device is the second adapter , The current absorbed by the device to be charged (such as a terminal) may be greater than a preset current critical value I2 (for example, it 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 time period (for example, continuous T1 time), the control unit may consider that the device to be charged (such as a terminal) is The type identification of the provided device has been completed, the control unit starts the negotiation procedure between the second adapter and the device to be charged (such as a terminal), and sends an instruction 1 (corresponding to the above first instruction) to the device to be charged (such as a terminal) to inquire Whether the device to be charged (such as a terminal) agrees to the second adapter to charge the device to be charged (such as a terminal) in the second charging mode.

When the control unit receives a reply instruction of instruction 1 sent by the device to be charged (such as a terminal), and the reply instruction of the instruction 1 indicates that the device to be charged (such as the terminal) does not agree with the second adapter to treat the device to be charged (such as (Terminal) When 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 (for example, it may be continuous T1 time), the control unit sends a command 1 to the device to be charged (such as a terminal) again to inquire about the device to be charged (Such as the terminal) whether the second adapter is allowed to charge the charging device (such as the terminal) in the second charging mode. The control unit repeats the above steps of stage 1 until the device to be charged (such as the terminal) agrees to charge the device to be charged (such as the terminal) in the second charging mode, or the output current of the second adapter no longer meets or exceeds I2 conditions of.

After the device to be charged (such as the terminal) agrees to the second adapter to charge the device to be charged (such as the terminal) in the second charging mode, the communication process enters the second stage.

Phase 2: The output voltage of the second adapter may include multiple gears. The control unit sends a command 2 (corresponding to the above-mentioned second command) to the device to be charged (such as a terminal) to inquire whether the output voltage (current output voltage) of the second adapter matches the current voltage of the battery of the device to be charged (such as a terminal). .

The device to be charged (such as a terminal) sends a reply instruction of 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 a terminal), is high or low. If the response to the command 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 by one division and send the command 2 to the device to be charged (such as a terminal) again. , And ask again whether the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (such as a terminal). Repeat the above steps of stage 2 until the device to be charged (such as the terminal) determines 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), and enter the third stage.

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

Phase 4: The control unit determines the charging current output by the second adapter for charging the device to be charged (eg, the terminal) according to the maximum charging current currently supported by the device to be charged (eg, the terminal), and then enters the phase 5, the constant current charging phase.

Phase 5: After entering the constant current charging phase, the control unit can send a command 4 (corresponding to the fourth command) to the device to be charged (such as the terminal) at intervals, and to 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) may send a response instruction of instruction 4 to the control unit to feedback the current voltage of the battery of the device to be charged (such as a terminal). The control unit can determine whether the contact of the charging interface is good and whether the output current of the second adapter needs to be reduced according to the current voltage of the battery of the device (such as a terminal) to be charged. When the second adapter determines that the charging interface has a poor contact, it can send a command 5 (corresponding to the fifth command above) to the device to be charged (such as a terminal). The second adapter will exit the second charging mode, and then reset and re-enter stage 1 .

Optionally, in some embodiments, in phase 1, when the device to be charged (such as a terminal) sends a response instruction of instruction 1, the response instruction of instruction 1 may carry the path impedance of the device to be charged (such as a terminal). Data (or information). The path impedance data of the device to be charged (such as a terminal) can be used to determine whether the contact of the charging interface is good at stage 5.

Optionally, in some embodiments, in stage 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 charge the second The time it takes for the output voltage of the adapter to adjust to a suitable charging voltage can be controlled within a certain range. If the time exceeds the predetermined range, the second adapter or the device to be charged (such as a terminal) may determine that the fast charging communication program is abnormal and reset to re-enter Phase 1.

Optionally, in some embodiments, in phase 2, when the output voltage of the second adapter is higher than the current voltage of the battery of the device to be charged (such as a terminal) by ΔV (ΔV can be set to 200 ~ 500mV), the device to be charged is (For example, the terminal) may send a response instruction of the 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 (for example, 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 adjustment speed being too fast. The charging process of the output device (such as a terminal) is abnormal.

Optionally, in some embodiments, in phase 5, the variation range of the output current of the second adapter may be controlled within 5%.

Optionally, in some embodiments, in phase 5, the control unit may 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 and output current of the second adapter and the current voltage of the battery fed back by the device to be charged (such as a terminal). When "the path impedance of the charging circuit"> "the path impedance of the device to be charged (such as a terminal) + the impedance of the charging cable", it can be considered that the charging interface has a poor contact, and the second adapter stops charging a battery to be charged in the second charging mode. Device (such as a terminal) for charging.

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, the communication time interval between the control unit and the device to be charged (such as a terminal) may be Control within a certain range to avoid abnormal communication procedures caused by too short communication intervals.

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

For example, when it is detected that the battery of the device to be charged (such as a terminal) is full or the charging interface is in poor contact, the charging process is stopped, the charging communication process is reset, and the charging process re-enters stage 1. Then, the device to be charged (such as a terminal) does not agree with the second adapter to charge a device to be charged (such as a terminal) in the second charging mode, and the communication process does not enter stage 2. The stop of the charging procedure in this case can be regarded as an irrecoverable stop.

As another example, when a communication abnormality occurs between the control unit and a device to be charged (such as a terminal), the charging procedure is stopped, the charging communication procedure is reset, and the charging procedure enters stage 1 again. After meeting the requirements of stage 1, the device to be charged (such as a terminal) agrees to the second adapter to charge a device to be charged (such as a terminal) in the second charging mode to resume the charging process. The stop of the charging procedure in this case can be regarded as a recoverable stop.

For another example, when the battery to be charged (such as a terminal) detects that the battery is abnormal, the charging process stops, the charging communication program resets, and the charging process re-enters stage 1. Then, the device to be charged (such as a terminal) does not agree with the second adapter to charge 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 stage 1, 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. The stop of the fast charge procedure in this case can be regarded as a recoverable stop.

The communication steps or operations shown in FIG. 5B are merely examples. For example, in 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 a terminal) and the control unit can 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 a command 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 response instruction from the control unit and instructs the control unit to agree to the second adapter to charge a device to be charged (such as a terminal) in the second charging mode, the second adapter starts in the second charging mode. Next, charge the battery of a device to be charged (such as a terminal).

As another example, after stage 5, a constant voltage charging stage may be further 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 shifts from the constant current charging phase to the constant voltage. Charging phase. During the constant voltage charging phase, the charging current gradually decreases. When the current drops to a certain threshold, the entire charging process is stopped, indicating that the battery of the device to be charged (such as a terminal) has been fully charged.

Optionally, in some embodiments, the second adapter directly loads the output current of the second adapter to both ends of a battery of a device to be charged (such as a terminal) to directly charge the battery.

Specifically, direct charging may refer to directly loading (or directing to) the output voltage and output current of the second adapter at both ends of a battery of a device (such as a terminal) to be charged, and charging the battery of the device (such as a terminal). In the middle, there is no need to transform the output current or output voltage of the second adapter through a conversion circuit to avoid energy loss caused by the conversion process. 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 completes the conversion of the charging voltage or charging current. It can reduce the load on the device to be charged (such as a terminal) and reduce the heat generation of the device to be charged.

The second adapter 10 according to the embodiment of the present invention can work 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 usually charged in a segmented constant current mode in the constant current mode.

Multi-stage constant current charging has N charging stages (N is an integer not less than 2). Segmented constant current charging can start the first stage charging with a predetermined charging current. The N charging stages of this segmented constant current charging are sequentially executed from the first stage to the (N-1) th stage. When the previous charging stage in the charging stage is transferred to the next charging stage, the charging current value becomes smaller. ; When the battery voltage reaches the critical value of the charging termination voltage, the previous charging phase in the charging phase will transfer 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 hoe wave current), The waveform of the pulsating DC current is shown in FIG. 6.

Optionally, in some embodiments, when the output current of the second adapter is a pulsating DC power, the constant current mode may refer to a charging mode that controls the peak or average value of the pulsating DC power, that is, controls the 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 alternating current, and the alternating current can also reduce the phenomenon of lithium precipitation of the lithium battery and increase the service life of the battery.

The device embodiments of the present invention are described in detail above with reference to FIGS. 1 to 7, and the method embodiments of the embodiments of the present invention are described in detail with reference to FIG. 8. It should be understood that the description on the method side and the device side description are mutually Correspondingly, for brevity, repeated descriptions are appropriately omitted.

FIG. 8 is a schematic flowchart of a charging control method according to an embodiment of the present invention. The method in FIG. 8 may be performed by the second adapter in the foregoing. For example, the method may be the second adapter described in FIGS. 1 to 7. Specifically, the second adapter includes a power conversion unit. It is used to convert the input AC power to obtain the output voltage and output current of a second adapter. The power conversion unit includes a primary filter unit.

The method of FIG. 8 includes the following actions.

810. In a case where the second adapter works in the first charging mode, control the secondary filtering unit of the second adapter to work so that the second adapter outputs constant DC power.

820. In a case where the second adapter works in the second charging mode, control the secondary filter unit to stop working, so that the second adapter outputs AC power or pulsating DC power.

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

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

Optionally, in some embodiments, the second adapter charges a device to be charged faster in the second charging mode than the second adapter charges the device to be charged in the first charging mode. The method of FIG. 8 may further include: performing a two-way communication with the device to be charged in a program in which the second adapter is 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 performing bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode includes: performing bidirectional 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 inquire whether the device to be charged turns on the second charging mode; receiving 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 Turn on the second charging mode; and when the device to be charged agrees to turn on the second charging mode, use the second charging mode to charge the device to be charged.

Optionally, in some embodiments, the program for performing bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode includes: performing bidirectional communication with the device to be charged, Determine the charging voltage output by the second adapter for charging the device to be charged in the second charging mode; adjust the output voltage of the second adapter so that the output voltage of the second adapter is equal to A 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 to determine a charging voltage output by the second adapter in the second charging mode for charging the device to be charged includes: : Sending a second instruction to the device to be charged, the second instruction is used to inquire whether the output voltage of the second adapter matches the current voltage of a battery of the device to be charged; receiving the second signal sent by the device to be charged A reply instruction to the instruction. The reply instruction to 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 performing bidirectional communication with the device to be charged to control the output of the second adapter in the second charging mode includes: performing bidirectional communication with the device to be charged, Determine the charging current output by the second adapter for charging the device to be charged in the second charging mode; adjust the output current of the second adapter so that the output current of the second adapter is equal to A charging current output by the second adapter in the second charging mode for charging the device to be charged.

Optionally, in some embodiments, the bidirectional communication with the device to be charged to determine a charging current output by the second adapter in the second charging mode for charging the device to be charged includes: : Sending a third instruction to the device to be charged, the third instruction is used to inquire the maximum charging current currently supported by the device to be charged; receiving a reply instruction of the third instruction sent by the device to be charged, and the third instruction The reply instruction is used to indicate the maximum charging current currently supported by the device to be charged; and 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 is used to perform the operation on the device to be charged. Charging charging current.

Optionally, in some embodiments, the program for performing two-way communication with the device to be charged to control the output of the second adapter in the second charging mode includes: 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 bidirectional communication with the device to be charged to adjust the output current of the second adapter includes: a fourth instruction sent to the device to be charged, where the fourth instruction is used for Querying the current voltage of a battery of the device to be charged; receiving a reply instruction of the fourth instruction sent by the second adapter, the reply instruction of the fourth instruction is used to indicate the current voltage of the battery; according to the current voltage of the battery, The output current of the second adapter is adjusted.

Optionally, in some embodiments, the second adapter includes 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.

Optionally, in some embodiments, in the second charging mode, the output current of the second adapter is a pulsating DC power.

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 output current of the second adapter are directly loaded on both ends of a battery of the device to be charged to directly charge the battery.

Optionally, in some embodiments, the second adapter includes a control unit for controlling a charging program, and the control unit is 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 the “second adapter” herein are only for convenience of description, and are not intended to limit the specific type of the adapter in the embodiment of the present invention.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by 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 technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working procedures of the systems, devices, and units described above can refer to the corresponding procedures in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, plural units or elements may be combined or integrated into Another system, or some features, can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this 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 separately physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially a part that contributes to the previous technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several The instructions are used to cause 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 in each embodiment of the present invention. The aforementioned storage media include: various types of programs that can store code such as flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM, random access memory), magnetic disks, or optical disks Media.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the patent application scope.

10‧‧‧ adapter

11‧‧‧Power Conversion Unit

12‧‧‧Control unit

51‧‧‧Charging interface

52‧‧‧ Data Line

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are just some embodiments of the present invention. Those of ordinary skill in the art can obtain other drawings according to the drawings without paying creative labor. FIG. 1 is a schematic structural diagram of a second adapter according to an embodiment of the present invention. 2A and 2B are schematic diagrams of a pulsation waveform according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 5A is a schematic diagram of a connection manner between a second adapter and a device to be charged according to an 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. FIG. 6 is a schematic diagram of a current waveform of a pulsating DC power. FIG. 7 is a schematic diagram of a pulsating DC power in a constant current mode according to an embodiment of the present invention. FIG. 8 is a schematic flowchart of a charging control method according to an embodiment of the present invention.

Claims (36)

An adapter supporting a first charging mode and a second charging mode, characterized in that the adapter includes: a power conversion unit for converting the input AC power to obtain the output voltage and output current of the adapter The power conversion unit includes a primary filtering unit; a control unit connected to the secondary filtering unit, and when the adapter works in the first charging mode, the control unit controls the secondary filtering unit to work, so that the The adapter outputs a constant DC power. When the adapter works in the second charging mode, the control unit controls the secondary filtering unit to stop working, so that the adapter outputs AC power or pulsating DC power. The adapter according to item 1 of the scope of patent application, wherein the capacitor in the secondary filtering unit is a solid capacitor. The adapter according to item 2 of the scope of patent application, wherein the secondary filtering unit includes a plurality of solid capacitors, and the plurality of solid capacitors are all connected to the secondary bus and ground of the adapter. The adapter according to any one of claims 1 to 3, wherein the adapter charges a device to be charged faster in the second charging mode than the adapter in the first charging mode. For the charging speed of the device to be charged, in a program in which the adapter is connected to the device to be charged, 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 adapter according to item 4 of the scope of patent application, wherein the program for the control unit to communicate with the device to be charged to control the output of the adapter in the second charging mode includes 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 according to item 5 of the scope of patent application, wherein the control unit and the to-be-charged device perform two-way communication to negotiate a charging mode between the adapter and the to-be-charged device, including: the control unit supplies the to-be-charged The device sends a first instruction, the first instruction is used to inquire whether the device to be charged turns on the second charging mode; the control unit receives a reply instruction of the first instruction sent by the device to be charged, a reply of the first instruction The instruction 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 enable the second charging mode, the control unit uses the second charging mode to charge the device to be charged. The adapter according to item 4 of the scope of patent application, wherein the program for the control unit to communicate with the device to be charged to control the output of the adapter in the second charging mode includes the control unit and the The to-be-charged device performs two-way communication to determine a charging voltage output by the adapter in the second charging mode for charging the to-be-charged device; the control unit adjusts the output voltage of the adapter so that the adapter ’s The output voltage is equal to the charging voltage output by the adapter for charging the device to be charged in the second charging mode. The adapter according to item 7 of the scope of patent application, wherein the control unit and the to-be-charged device communicate bidirectionally to determine the output of the adapter for charging the to-be-charged device in the second charging mode. The charging voltage includes: the control unit sends a second instruction to the device to be charged, the second instruction is used to query whether the output voltage of the adapter matches the current voltage of a battery of the device to be charged; the control unit receives the The reply command of the second command sent by the device to be charged, the reply command of the second command is used to indicate that the output voltage of the adapter matches the current voltage of the battery, is high or low. The adapter according to item 4 of the scope of patent application, wherein the program for the control unit to communicate with the device to be charged to control the output of the adapter in the second charging mode includes the control unit and the The to-be-charged device performs bidirectional communication to determine a charging current output by the adapter in the second charging mode for charging the to-be-charged device; the control unit adjusts the output current of the adapter so that the adapter ’s The output current is equal to the charging current output by the adapter for charging the device to be charged in the second charging mode. The adapter according to item 9 of the scope of patent application, 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 instruction to the device to be charged, the third instruction is used to query the maximum charging current currently supported by the device to be charged; and the control unit receives the third instruction sent by the device to be charged A reply instruction of the instruction, and 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 the second charging mode according to the 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 according to item 4 of the scope of patent application, wherein 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, including: using the second In the charging mode of the charging mode, the control unit performs two-way communication with the device to be charged to adjust the output current of the adapter. The adapter according to item 11 of the scope of patent application, wherein the control unit performs two-way communication with the device to be charged to adjust the output current of the adapter, including: a fourth instruction sent by the control unit to the device to be charged The fourth instruction is used to query the current voltage of a battery of the device to be charged; the control unit receives a reply instruction of the fourth instruction sent by the adapter, and the reply instruction of the fourth instruction is used to indicate the current voltage of the battery ; The control unit adjusts the output current of the adapter according to the current voltage of the battery. The adapter according to item 4 of the scope of patent application, wherein the adapter includes a charging interface, and the control unit performs two-way communication with the device to be charged through a data cable in the charging interface. The adapter according to item 1 of the scope of patent application, wherein in the second charging mode, the output current of the adapter is a pulsating DC power. The adapter according to item 1 of the scope of patent application, wherein in the second charging mode, the output current of the adapter is alternating current. The adapter according to item 1 of the scope of patent application, wherein in the second charging mode, the output voltage and output current of the adapter are directly loaded on both ends of a battery of the device to be charged, and the battery is directly charged. Charge. The adapter according to item 1 of the scope of patent application, wherein the control unit is a micro control unit MCU. The adapter according to item 1 of the scope of patent application, wherein the adapter includes a charging interface, and the charging interface is a universal serial bus USB interface. A charging control method, which is characterized in that the method is applied to an adapter. The adapter includes a power conversion unit. The power conversion unit is used to convert the input AC power to obtain the output voltage and output current of the adapter. The unit includes a primary filtering unit. The method includes: controlling the secondary filtering unit of the adapter to work when the adapter works in a first charging mode, so that the adapter outputs a constant DC power; and the adapter works in a second charging mode. In the case, the secondary filtering unit is controlled to stop working, so that the adapter outputs AC power or pulsating DC power. The method according to item 19 of the application, wherein the capacitor in the secondary filtering unit is a solid capacitor. The method of claim 20, wherein the secondary filtering unit includes a plurality of solid capacitors, and the plurality of solid capacitors are all connected to the secondary bus and ground of the adapter. The method according to any one of claims 19 to 21, wherein the adapter charges a device to be charged in the second charging mode faster than the adapter in the first charging mode. For the charging speed of the to-be-charged device, the method further includes: performing a two-way communication with the to-be-charged device in a program connecting the adapter to the to-be-charged device to control the output of the adapter in the second charging mode. The method according to item 22 of the scope of patent application, wherein the program for performing two-way communication with the device to be charged to control the output of the adapter in the second charging mode includes: performing two-way communication with the device to be charged Communicating to negotiate a charging mode between the adapter and the device to be charged. The method according to item 23 of the patent application, 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: sending a first to the device to be charged Instruction, the first instruction is used to inquire whether the device to be charged turns on the second charging mode; receiving a reply instruction of the first instruction sent by the device to be charged, the reply instruction of the first instruction is used to instruct the device to be charged Whether to agree to enable the second charging mode; and when the device to be charged agrees to enable the second charging mode, use the second charging mode to charge the device to be charged. The method according to item 22 of the scope of patent application, wherein the program for performing two-way communication with the device to be charged to control the output of the adapter in the second charging mode includes: performing two-way communication with the device to be charged Communicating to determine the charging voltage output by the adapter for charging the device to be charged in the second charging mode; adjusting the output voltage of the adapter so that the output voltage of the adapter is equal to the second charging A charging voltage output by the adapter in a mode for charging the device to be charged. The method as described in claim 25, wherein the two-way communication with the device to be charged is used to determine a charging voltage output by the adapter in the second charging mode for charging the device to be charged. Including: sending a second instruction to the device to be charged, the second instruction being used to inquire whether the output voltage of the adapter matches the current voltage of a battery of the device to be charged; receiving the second sent by the device to be charged A reply command of the command. The reply command of the second command is used to indicate that the output voltage of the adapter matches the current voltage of the battery, is higher or lower. The method according to item 22 of the scope of patent application, wherein the program for performing two-way communication with the device to be charged to control the output of the adapter in the second charging mode includes: performing two-way communication with the device to be charged Communicating to determine the charging current output by the adapter in the second charging mode for charging the device to be charged; adjusting the output current of the adapter so that the output current of the adapter is equal to the second charging A charging current output by the adapter in a mode for charging the device to be charged. The method according to item 27 of the scope of patent application, wherein the two-way communication with the device to be charged is used to determine a charging current output by the adapter in the second charging mode for charging the device to be charged Including: sending a third instruction to the device to be charged, the third instruction for inquiring the maximum charging current currently supported by the device to be charged; receiving a reply instruction of the third instruction sent by the device to be charged, the third instruction The reply instruction of the instruction is used to indicate the maximum charging current currently supported by the device to be charged; and 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 determining the device to be charged is determined. Charging charging current. The method according to item 22 of the scope of patent application, wherein the program for bidirectional communication with the device to be charged to control the output of the adapter in the second charging mode includes: using the second charging mode During the charging process, two-way communication is performed with the device to be charged to adjust the output current of the adapter. The method according to item 29 of the scope of patent application, wherein the two-way communication with the device to be charged to adjust the output current of the adapter includes: a fourth instruction sent to the device to be charged, the fourth instruction For inquiring the current voltage of a battery of the device to be charged; receiving a reply instruction of the fourth instruction sent by the adapter; the reply instruction of the fourth instruction is used to indicate the current voltage of the battery; according to the current voltage of the battery, Adjust the output current of the adapter. The method as described in claim 22, wherein the adapter includes a charging interface, and the control unit performs two-way communication with the device to be charged through a data cable in the charging interface. The method as described in claim 19, wherein in the second charging mode, the output current of the adapter is a pulsating DC power. The method as described in claim 19, wherein in the second charging mode, the output current of the adapter is alternating current. The method according to item 19 of the scope of patent application, wherein in the second charging mode, the output voltage and output current of the adapter are directly loaded on both ends of a battery of the device to be charged, and the battery is directly charged. Charge. The method according to item 19 of the patent application scope, wherein the adapter includes a control unit for controlling a charging program, and the control unit is a micro control unit MCU. The method according to item 19 of the scope of patent application, wherein the adapter includes a charging interface, and the charging interface is a universal serial bus USB interface.