Adapter and Charging Method

Abstract

The present application provides an adapter and charging method, comprising: at least one filter capacitor, the capacity of which is less than a preset threshold, configured to filter rectified alternating current to generate a pulsating direct current; and a voltage transformer module configured to transform the pulsating direct current to generate a voltage and current for charging a device to be charged. The battery charging adapter provided in embodiments of the present application can reduce the size of the adapter, thereby achieving miniaturization.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of charging technology, and more particularly, to an adapter and a charging method. Background Art

[0002] Currently, the adapter is relatively large in size. The reasons for this include the large size of the electrolytic capacitor used for filtering, which makes it inconvenient to carry. Therefore, how to reduce the size of the adapter is a problem to be solved. Summary of the Invention

[0003] The present application provides an adapter and a charging method, which can reduce the volume of the adapter and achieve miniaturization of the adapter.

[0004] In a first aspect, an adapter is provided, comprising: at least one filter capacitor, wherein the capacity of the at least one filter capacitor is less than a preset threshold, and is used to filter the rectified AC current to obtain a pulsating DC current; and a transformer module, which is used to transform the pulsating DC current to obtain a voltage and current for charging a device to be charged.

[0005] In a second aspect, a charging method is provided, including: the charging method is applied to an adapter, the adapter includes at least one filter capacitor and a transformer module, and the method includes: filtering the rectified AC current to obtain a pulsating DC current; and transforming the pulsating DC current to obtain a voltage and current for charging a device to be charged.

[0006] In a third aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method according to any one of the second aspect or its various implementations.

[0007] In a fourth aspect, a computer program product is provided, characterized in that it includes computer program instructions, which enable a computer to execute the method of any one of the above-mentioned second aspect or its various implementations.

[0008] In the adapter provided by the embodiment of the present application, the capacity of the filter capacitor in the adapter is less than a certain threshold value, which can reduce the volume of the filter capacitor, thereby reducing the volume of the adapter and achieving miniaturization of the adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of an adapter provided in one embodiment of the present application;

[0010] Figure 2 is a schematic structural diagram of an adapter provided in one embodiment of the present application;

[0011] Figure 3 is a schematic structural diagram of an adapter provided in another embodiment of the present application;

[0012] Figure 4 is a schematic structural diagram of an adapter provided in yet another embodiment of the present application;

[0013] Figure 5 A schematic structural diagram of a charging system provided by one embodiment of the present application;

[0014] Figure 6 is a schematic structural diagram of a charging system provided in another embodiment of the present application;

[0015] Figure 7a This is a schematic diagram of the relationship between the output voltage and time of the adapter during the charging process under different filter capacitors provided by the present application;

[0016] Figure 7b This is a schematic diagram of a curve showing the relationship between the output current and time of the adapter during the charging process under different filter capacitors provided by the present application;

[0017] Figure 8 is a schematic flow chart of a charging method provided in one embodiment of the present application;

[0018] Figure 9 This is a schematic structural diagram of a wired charging system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0020] In order to understand this application more clearly, the following Figure 1 The working principle and process of the adapter are introduced to facilitate the subsequent understanding of the solution of this application. However, it should be understood that the following introduction is only for a better understanding of this application and should not be used to limit this application.

[0021] like Figure 1 As shown in FIG, it is a schematic structural diagram of the adapter 100 provided in an embodiment of the present application. Figure 1 As shown, the adapter 100 may include an input interface 110, a rectifier module 111, a filter module 112, a switching power supply 113, a transformer 114, a filter module 115, an output interface 116, a current control module 117, an output voltage control module 118 and a voltage and current feedback modulation module 119.

[0022] Among them, after the AC current is input into the adapter through the input interface 110, DC power can be obtained after rectification processing by the rectifier module 111. The DC power can be filtered by the filter module 112 to obtain a relatively stable DC power. The switching power supply 113 can chop and modulate the DC power obtained after filtering. For example, the size of the output DC power can be achieved by controlling and adjusting the duty cycle of the switching power supply. The transformer 114 can step down the voltage modulated by the switching power supply 113. The filter module 115 can further filter the DC power converted by the transformer 114 to obtain the DC voltage and DC current required by the battery, and charge the battery through the charging interface.

[0023] The current control module 117 in the embodiment of the present application can sample the current output by the switching power supply 113, the output voltage control module 118 can sample the output DC voltage, and the voltage-current feedback modulation module 119 can control and adjust the duty cycle of the switching power supply 113 according to the voltage and current sampled by the current control module 117 and the output voltage control module 118, so as to adjust the magnitude of the output DC power.

[0024] The adapter in the embodiment of the present application is generally large in size. The reasons for the large size include the large size of the transformer used in the adapter, the large size of the electrolytic capacitor used for filtering, or the low degree of integration and modularization of the circuit.

[0025] The adapter provided in the embodiment of the present application can reduce the volume of the adapter and achieve miniaturization of the adapter.

[0026] The battery in the embodiments of the present application may be a battery in an electronic device, the "electronic device" may include, but is not limited to, a satellite or cellular phone; a personal communication system (PCS) terminal that can combine a cellular radio phone with data processing, fax, and data communication capabilities; a personal digital assistant (PDA) that may include a radio phone, a pager, Internet / intranet access, a web browser, a notepad, a calendar, and / or a global positioning system (GPS) receiver; and conventional laptop and / or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In some embodiments, the device to be charged may refer to a mobile terminal device or a handheld terminal device, such as a mobile phone, a pad, etc. In some embodiments, the device to be charged mentioned in the embodiments of the present application may refer to a chip system, in which case the battery of the device to be charged may or may not belong to the chip system.

[0027] In addition, terminals can also include other devices requiring charging, such as mobile phones, mobile power banks (such as power banks and travel chargers), electric vehicles, laptops, drones, tablets, e-books, e-cigarettes, smart devices requiring charging, and small electronic products. Examples of smart devices requiring charging include watches, bracelets, smart glasses, and robot vacuums. Examples of small electronic products include wireless headphones, Bluetooth speakers, electric toothbrushes, and rechargeable wireless mice.

[0028] The following combination Figure 2 , the adapter 200 provided in the embodiment of the present application is introduced in detail. The adapter 200 may include at least one filter capacitor 210 and a transformer module 220.

[0029] At least one filter capacitor 210, the capacity of which is less than a preset threshold, is used to filter the rectified AC current to obtain a pulsating DC current.

[0030] The voltage transformation module 220 is used to transform the pulsating DC current to obtain a voltage and current for charging the device to be charged.

[0031] In the embodiment of the present application, at least one capacitor 210 may be Figure 1 The capacitor included in the filter module 112, the transformer module 220 may include Figure 1 The switching power supply 113 and the transformer 114 in the.

[0032] The capacity of the filter capacitor in the embodiment of the present application can be less than a preset threshold, for example, less than 100 F. When the capacity of the filter capacitor is less than the preset threshold, its volume is also relatively small, so the volume of the adapter can be minimized.

[0033] It is understood that in the embodiments of the present application, in order to reduce the volume of the adapter, the volume of the filter capacitor can be reduced. In other words, the embodiment of the present application does not need to consider the capacity of the filter capacitor, as long as the volume of the adapter is reduced.

[0034] In the adapter provided by the embodiment of the present application, the capacity of the filter capacitor in the adapter is less than a certain threshold value, which can reduce the volume of the filter capacitor, thereby reducing the volume of the adapter and achieving miniaturization of the adapter.

[0035] Optionally, in some embodiments, Figure 3 As shown, the voltage transformation module 220 may include a switch module 221 and a transformer 222. The adapter 200 may further include a first detection module 231 and a control module 240.

[0036] The first detection module 231 is configured to detect the voltage and / or current of the pulsating direct current.

[0037] The control module 240 is configured to control the on-time of the switch module according to the voltage and / or current detection results of the pulsating direct current, so as to control the output power of the transformer.

[0038] The switch module 221 in the embodiment of the present application can be Figure 1 The switching power supply 113 and the transformer 114 can be Figure 1 The first detection module 231 may include Figure 1 The current control module 117 and the output voltage control module 118 in the control module 240 can be Figure 1 The voltage and current feedback modulation module 119 in.

[0039] In the embodiment of the present application, the first detection module 231 can detect the voltage of the DC current obtained after filtering by the filter capacitor 210, so that the control module 240 can control the conduction time of the switch module 221 according to the voltage of the DC current detected by the first detection module 231.

[0040] Similarly, the first detection module 231 can detect the DC current obtained after filtering by the filter capacitor 210, so that the control module 240 can control the on-time of the switch module 221 according to the current size of the DC current detected by the first detection module 231.

[0041] The above describes that the control module can control the conduction time of the switch module according to the voltage and / or current of the pulsating DC current detected by the first detection module. The following will specifically introduce how the control module controls the conduction time of the switch module according to the voltage of the detected pulsating DC current.

[0042] Optionally, in some embodiments, the control module is further used to: reduce the conduction time of the switch module when the voltage of the pulsating direct current is less than a first preset voltage threshold; and / or reduce the conduction time of the switch module when the current of the pulsating direct current is less than a first preset current threshold.

[0043] In the embodiment of the present application, voltage is used as an example for explanation. In the present application, the first detection module 231 can detect the voltage of the pulsating DC current after filtering by the filter capacitor 210 to control the on-time of the switch module 221. If the voltage of the pulsating DC current detected by the first detection module 231 is less than a first preset voltage threshold, for example, less than 100V, the control module 240 can control the on-time of the switch module 221 to be reduced, thereby reducing the output power when the input voltage of the adapter is low, and further, improving the overall output efficiency of the adapter.

[0044] It should be understood that the on-time of the switch module 221 may be correlated with the current flowing through the switch module 221 , that is, the longer the on-time of the switch module 221 , the greater the current flowing through the switch module 221 ; and the shorter the on-time of the switch module 221 , the smaller the current flowing through the switch module 221 .

[0045] Similarly, the first detection module 231 may also detect the current magnitude of the pulsating DC current filtered by the filter capacitor 210 to control the on-time of the switch module 221 , which will not be described in detail here for the sake of brevity.

[0046] Optionally, in some embodiments, Figure 4 As shown, the adapter may further include an operational amplifier module 250 .

[0047] The operational amplifier module 250 is used to convert the voltage value of the pulsating DC current into a current value. One end of the operational amplifier module is connected to the output end of the at least one capacitor, and the other end is connected to the first detection module. The control module is further used to: control the conduction time of the switching module according to the converted current value to control the output power of the transformer.

[0048] Optionally, in some embodiments, the control module is configured to reduce the on-time of the switch module when the converted current value is less than a second preset current threshold.

[0049] In an embodiment of the present application, the voltage of the pulsating DC current output by the filter capacitor 210 can be converted by the operational amplifier module 250, and the voltage can be converted into a current. The first detection module 231 detects the current obtained after the conversion, and the control module 240 can adjust the on-time of the switch module 221 according to the converted current detected by the first detection module 231. If the converted current is less than the second preset current threshold, the on-time of the switch module 221 can be controlled to be reduced. For example, assuming that the preset current threshold is 50A, if the first detection module 231 detects that the current converted by the operational amplifier module 250 is 40A, which is less than the second preset current threshold, the control module 240 can control the current flowing through the switch module 221 to be reduced, such as controlling the on-time of the switch module 221 to be reduced, thereby reducing the output power when the voltage of the input adapter is low, and further, improving the overall output efficiency of the adapter.

[0050] Optionally, in some embodiments, Figure 4 As shown, the adapter further includes a second detection module 232 .

[0051] The second detection module 232 is used to detect the current and / or voltage outputted from the secondary side of the transformer 222; the control module 240 is further used to control the conduction time of the switch module according to the current and / or voltage detection results outputted from the secondary side of the transformer, combined with the voltage and / or current detection results of the pulsating DC current, so as to control the output power of the transformer.

[0052] In the embodiment of the present application, voltage is used as an example for explanation. The present application can also control the on-time of the switch module 221 by detecting the voltage output on the secondary side of the transformer 222 and combining it with the voltage of the pulsating DC current. If the voltage output on the secondary side of the transformer 222 detected by the second detection module 232 is less than a preset threshold, for example, less than 10V, and the voltage of the pulsating DC current is less than a preset threshold, for example, less than 30V, the control module 240 can control the on-time of the switch module to be reduced, thereby reducing the output power when the voltage of the input adapter is low, and further improving the overall output efficiency of the adapter.

[0053] The method for controlling the on-time of the switch module according to the magnitude of the current is similar to the above method and will not be described again for the sake of brevity.

[0054] like Figure 5 FIG2 is a schematic structural diagram of a charging system 500 provided for implementation of the present application. Specifically, the charging system 500 may include an adapter 500a and an electronic device 500b, wherein the adapter 500a may be the adapter 200 mentioned above.

[0055] The adapter 500a in the embodiment of the present application may include a rectifier module 510, a filter module 520, a conversion module 530, an operational amplifier module 540, a first control module 550, a second control module 560, and a switch module 570. The filter module 520 in the embodiment of the present application may include a filter C1, wherein the filter C1 may be the filter capacitor 210 described above, the switch module 570 may be the switch module 221 described above, the conversion module 530 may be the transformer 222 described above, and the first control module 550 and the second control module 560 may both be the control module 240 described above.

[0056] In the embodiment of the present application, when the switch module 570 is disconnected, if the power supply device charges the battery through the input interface of the adapter, since the switch module 570 is in the disconnected state, the AC current input through the input interface passes through the rectifier module 510 and the filter module 520, and then outputs a DC current, which directly charges the battery through the conversion module 530. However, this excessive DC current may damage the adapter. Therefore, further improvements to the adapter are possible, as will be described in detail below.

[0057] Optionally, in some embodiments, Figure 6 As shown, the adapter further includes: a clamping module 580, which is used to absorb the leakage inductance energy of the transformer and release the absorbed energy to the output end of the transformer when the switch module is disconnected.

[0058] like Figure 6 As shown, the control module in the embodiment of the present application can be Figure 6 One end of the clamping module in the embodiment of the present application can be connected to the output end of the at least one filter capacitor, and the other end can be connected to the first control module 550.

[0059] The clamping module 580 in the embodiment of the present application may include a capacitor C2, which can absorb all or part of the leakage inductance energy of the transformer when the switch module 570 is disconnected. The energy processed by the clamping module 580 can be input to the output terminal of the transformer to charge the battery.

[0060] Due to the presence of the clamping module 580, the rigidity of the switch tube included in the switch module 570 can be reduced, and a switch tube with a lower conductivity can be used, thereby reducing costs and improving the conversion efficiency of the adapter.

[0061] It should be understood that the clamping module 580 and the switch module 570 in the embodiment of the present application operate in a complementary mode, that is, when the switch module 570 is in a closed state, the clamping module 580 can be disconnected; when the switch module 570 is in an open state, the clamping module 580 can be closed.

[0062] Specifically, when the switch module 570 is in a closed state, the clamping module 580 can be disconnected. In this case, the DC current output after passing through the filter can be chopped by the switch module 570, and the DC current processed by the conversion module 530 can be used to charge the battery; when the switch module 570 is in an open state, the clamping module 580 can be closed. In this case, part or all of the leakage inductance energy of the transformer can be absorbed by the clamping module 580, and the clamping module 580 then releases the absorbed energy to the output end of the conversion module 530 for charging the battery.

[0063] Optionally, in some embodiments, the adapter further includes a communication module for receiving voltage and / or current information fed back by the device to be charged; the control module is further used to control the conduction time of the switching module based on the fed back voltage and / or current information and the voltage detection result of the pulsating DC current.

[0064] Optionally, in some embodiments, the adapter further includes a communication module for receiving voltage and / or current information fed back by the device to be charged; the control module is further used to control the conduction time of the switching module based on at least one of the following information: the fed back voltage and / or current information, the current and / or voltage detection results output by the secondary side of the transformer, and the voltage and / or current detection results of the pulsating direct current.

[0065] In the embodiments of this application, voltage is used as an example for illustration. In one implementation, the adapter and the device to be charged can communicate with each other, and the device to be charged can feed back information about the voltage of the input battery to the adapter. After receiving the voltage information fed back by the device to be charged, the adapter combines the voltage detection result of the pulsating DC current to determine whether to increase or decrease the on-time of the switch module. If the voltage value is increased, the on-time of the switch module can be controlled to increase; if the voltage value is decreased, the on-time of the switch module can be controlled to decrease.

[0066] The method of determining the on-time of the switch module based on the current is similar to the above method and will not be described here for the sake of brevity.

[0067] Continuing with the voltage example, in another implementation, the adapter and the device to be charged can communicate, with the device to be charged providing feedback on the voltage of its battery input to the adapter. After receiving the voltage information from the device to be charged, the adapter can combine the voltage detection results of the transformer's secondary output and the voltage detection results of the pulsating DC power to determine whether to increase or decrease the switch module's on-time. If the voltage and / or current value is determined to be increased, the switch module's on-time can be increased; if the voltage and / or current value is determined to be decreased, the switch module's on-time can be decreased.

[0068] Alternatively, the device to be charged can feed back the voltage and / or current information of the input battery to the adapter. After receiving the voltage information fed back by the device to be charged, the adapter can determine whether to increase or decrease the conduction time of the switch module in combination with the voltage detection result outputted by the secondary side of the transformer.

[0069] Alternatively, the voltage and / or current information of the input battery can be fed back to the adapter by the device to be charged. After receiving the voltage information fed back by the device to be charged, the adapter can determine whether to increase or decrease the conduction time of the switch module based on the fed back voltage information.

[0070] The adapter in the embodiment of the present application can be used in a wired charging process. The pulsating DC current output from the adapter can be directly used to charge electronic devices.

[0071] Optionally, in some embodiments, the filter capacitor includes a chip capacitor, a film capacitor, or an electrolytic capacitor with a capacity smaller than the preset threshold.

[0072] The chip capacitor in the embodiment of the present application may refer to a multi-layer ceramic chip capacitor (MLCC), wherein the MLCC is made of parallel layers of ceramic materials and electrode materials; the film capacitor may be a capacitor having a cylindrical structure with metal foil as the electrode, which is overlapped with a plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate at both ends and then wound into a cylindrical structure.

[0073] The filter capacitor in the embodiment of the present application may also be other capacitors, such as a supercapacitor, etc., and the present application does not make any specific limitation on this.

[0074] It should be understood that when the filter capacitor in the embodiment of the present application is a chip capacitor or a thin film capacitor, if the capacitance of the capacitor is less than a preset threshold, the volume of the capacitor can be reduced, thereby reducing the volume of the adapter, and the rectified AC current can also be filtered.

[0075] For electrolytic capacitors, if the capacitance is less than a preset threshold, its volume can also be reduced, thereby achieving a smaller adapter. However, if the filter capacitor is an electrolytic capacitor with a capacitance less than the preset threshold, the filtering function of the electrolytic capacitor will be affected. For example, if the capacitance of the electrolytic capacitor is small, the ripple it generates will be relatively large.

[0076] The ripple in the embodiments of the present application may be caused by voltage fluctuations of a DC stabilized power supply. Since a DC stabilized power supply is generally formed by an AC power supply through rectification and voltage stabilization, it is inevitable that there are some AC components in the DC stabilized quantity. This AC component superimposed on the DC stabilized quantity is called ripple.

[0077] It can be understood that although an electrolytic capacitor with a capacity less than the preset threshold will produce a larger ripple, it can reduce the size of the adapter overall, and the DC current can be further filtered through a filter. Therefore, an electrolytic capacitor with a capacity less than the preset threshold can also be used in the embodiments of the present application.

[0078] In the adapter provided by the embodiment of the present application, the filter capacitor in the adapter can be a chip capacitor, a film capacitor, or an electrolytic capacitor with a capacity less than the preset threshold. When the capacity of the chip capacitor, the film capacitor, or the electrolytic capacitor with a capacity less than the preset threshold is small, its volume is relatively small, thereby reducing the volume of the adapter. In addition, the chip capacitor or film capacitor with a smaller capacity can withstand larger ripples, and its effect is relatively better than that of the electrolytic capacitor with a capacity less than the preset threshold. That is, the adapter can be miniaturized and can withstand the larger ripples caused by the reduced capacity.

[0079] In an embodiment of the present application, as shown in FIG7 , when the capacitor in the filter module adopts a chip capacitor or a film capacitor or an electrolytic capacitor with a capacity less than the preset threshold, the adapter may output a pulsating DC current.

[0080] Figure 7a The figure shows the relationship between the output voltage and time of the adapter during the charging process under different filter capacitors provided by the embodiment of the present application. Figure 7a As shown in the figure, curve 7a-1 is a curve showing the change in output voltage and time of the adapter during the charging process when the filter capacitor is an electrolytic capacitor with a capacity greater than a preset threshold; curve 7a-2 is a curve showing the change in output voltage and time of the adapter during the charging process when the filter capacitor is a chip capacitor or a film capacitor or an electrolytic capacitor with a capacity less than the preset threshold.

[0081] from Figure 7aIt can be seen that when an adapter uses an electrolytic capacitor with a capacity greater than the preset threshold, the output voltage is a relatively stable constant DC voltage; when a chip capacitor or a film capacitor or an electrolytic capacitor with a capacity less than the preset threshold is used to replace the electrolytic capacitor with a capacity greater than the preset threshold, the output voltage of the adapter is a pulsating DC voltage.

[0082] Figure 7b The figure shows the relationship between the output current and time of the adapter during the charging process under different filter capacitors provided by the embodiment of the present application. Figure 7b As shown in the figure, curve 7b-1 is a curve showing the change in output current and time of the adapter during the charging process when the filter capacitor is an electrolytic capacitor with a capacity greater than a preset threshold; curve 7b-2 is a curve showing the change in output current and time of the adapter during the charging process when the filter capacitor is a chip capacitor or a film capacitor or an electrolytic capacitor with a capacity less than the preset threshold.

[0083] from Figure 7b It can be seen that the adapter using an electrolytic capacitor with a capacity greater than the preset threshold value outputs a constant DC current; when a chip capacitor or a film capacitor or an electrolytic capacitor with a capacity less than the preset threshold value is used to replace the electrolytic capacitor with a capacity greater than the preset threshold value, the adapter outputs a pulsating DC current, wherein the frequency of the pulsating DC current may be the same as the mains frequency.

[0084] In the embodiment of the present application, since the filter capacitor is a chip capacitor or a thin film capacitor or an electrolytic capacitor with a capacity less than the preset threshold, the adapter outputs a pulsating DC current. When charging the electronic device, the electronic device will not be continuously charged with a large current. That is, after charging the electronic device with a large current for a period of time, the current can be reduced or even stopped, thereby reducing the loss to the battery and further extending the battery life.

[0085] Optionally, in some embodiments, the number of the filter capacitors is determined by the required capacitance.

[0086] Optionally, in some embodiments, the filter capacitor includes a plurality of capacitors connected in series or a plurality of capacitors connected in parallel.

[0087] In the embodiment of the present application, the number of the filter capacitors can be one or more, which can be determined based on the required capacitance. The filter capacitor in the embodiment of the present application can include multiple capacitors connected in series or multiple capacitors connected in parallel.

[0088] Specifically, assuming the required capacitance is 10uF, if the capacitance of a filter capacitor is 5uF, two filter capacitors can be connected in parallel to meet the required capacitance. If the capacitance of a filter capacitor is 20uF, two filter capacitors can be connected in series to meet the required capacitance.

[0089] It should be understood that the above numerical values are only for illustration and other numerical values are also possible, and should not constitute a particular limitation to the present application.

[0090] Combined with the above Figure 1 - Figure 7, describes in detail the device embodiment of the present application, and the following Figure 8 , describes the method embodiments of the present application. The method embodiments correspond to the device embodiments, so for parts that are not described in detail, please refer to the previous device embodiments.

[0091] like Figure 8 As shown, a charging method 800 provided in an embodiment of the present application is provided. The method 800 can be applied to an adapter. The adapter can include at least one filter capacitor and a transformer module. The method 800 can include steps 810-820.

[0092] 810 , filtering the rectified AC current to obtain a pulsating DC current.

[0093] 820 , transform the pulsating direct current to obtain a voltage and current for charging the device to be charged.

[0094] Optionally, in some embodiments, the adapter further includes a first detection module and a control module, the voltage transformation module includes a switch module and a transformer, and the method 800 further includes: detecting the voltage and / or current of the pulsating DC current; and controlling the conduction time of the switch module according to the detection results of the voltage and / or current of the pulsating DC current to control the output power of the transformer.

[0095] Optionally, in some embodiments, controlling the on-time of the switch module based on the voltage and / or current detection results of the pulsating direct current includes: reducing the on-time of the switch module when the voltage of the pulsating direct current is less than a first preset voltage threshold; and / or reducing the on-time of the switch module when the current of the pulsating direct current is less than a first preset current threshold.

[0096] Optionally, in some embodiments, the adapter further includes an operational amplifier module, one end of the operational amplifier module is connected to the output end of the at least one capacitor, and the other end is connected to the first detection module, and the method 800 further includes: converting the voltage value of the pulsating DC current into a current value; controlling the conduction time of the switch module according to the voltage and / or current detection results of the pulsating DC current includes: controlling the conduction time of the switch module according to the converted current value.

[0097] Optionally, in some embodiments, controlling the on-time of the switch module according to the converted current value includes: reducing the on-time of the switch module when the converted current value is less than a second preset current threshold.

[0098] Optionally, in some embodiments, the adapter further includes a second detection module, and the method 800 further includes: detecting the current and / or voltage outputted by the secondary side of the transformer; controlling the conduction time of the switch module according to the voltage and / or current detection results of the pulsating direct current, including: controlling the conduction time of the switch module according to the current and / or voltage detection results outputted by the secondary side of the transformer, combined with the voltage and / or current detection results of the pulsating direct current, so as to control the output power of the transformer.

[0099] Optionally, in some embodiments, the method 800 further includes: when the switch module is disconnected, absorbing leakage inductance energy of the transformer and releasing the absorbed energy to the output end of the transformer.

[0100] Optionally, in some embodiments, the adapter further includes a communication module, and the method 800 further includes: receiving voltage and / or current information fed back by the device to be charged; controlling the on-time of the switch module according to the voltage and / or current detection results of the pulsating DC current includes: controlling the on-time of the switch module according to the fed-back voltage and / or current information in combination with the voltage and / or current detection results of the pulsating DC current.

[0101] Optionally, in some embodiments, the adapter further includes a communication module, and the method 800 further includes: receiving voltage and / or current information fed back by the device to be charged; controlling the conduction time of the switch module based on the current and / or voltage detection results output by the secondary side of the transformer, combined with the voltage and / or current detection results of the pulsating direct current, including: controlling the conduction time of the switch module based on at least one of the following information: the fed back voltage and / or current information, the current and / or voltage detection results output by the secondary side of the transformer, and the voltage and / or current detection results of the pulsating direct current.

[0102] Optionally, in some embodiments, the filter capacitor includes a chip capacitor or a film capacitor.

[0103] Optionally, in some embodiments, the number of the filter capacitors is determined by the required capacitance.

[0104] Optionally, in some embodiments, the filter capacitor includes a plurality of capacitors connected in series or a plurality of capacitors connected in parallel.

[0105] The embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute any one of the above-mentioned charging methods 800.

[0106] An embodiment of the present application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute any one of the above-mentioned charging methods 800.

[0107] The solution of the embodiment of the present application can be applied in a wired charging process or in a wireless charging process, and the embodiment of the present application does not make any specific limitations on this.

[0108] The following combination Figure 9 , describes the wired charging process applied in the embodiment of the present application.

[0109] Figure 9 1 is a schematic structural diagram of a charging system provided in an embodiment of the present application. The charging system includes a power supply device 10, a battery management circuit 20, and a battery 30. The battery management circuit 20 can be used to manage the battery 30. The power supply device 10 in the embodiment of the present application can be the adapter 200 or 500a described above.

[0110] As an example, the battery management circuit 20 can manage the charging process of the battery 30, such as selecting a charging channel, controlling the charging voltage and / or charging current, etc.; as another example, the battery management circuit 20 can manage the cells of the battery 30, such as balancing the voltages of the cells in the battery 30, etc.

[0111] The battery management circuit 20 may include a first charging channel 21 and a communication control circuit 23 .

[0112] The first charging channel 21 may be configured to receive a charging voltage and / or a charging current provided by the power supply device 10 , and apply the charging voltage and / or the charging current to both ends of the battery 30 to charge the battery 30 .

[0113] The power supply device 10 may be the power supply device with adjustable output voltage described above, but the present embodiment does not specifically limit the type of the power supply device 10. For example, the power supply device 10 may be a device specifically used for charging, such as an adapter or a power bank, or may be other devices capable of providing power and data services, such as a computer.

[0114] The first charging channel 21 can be a direct charging channel, which can directly load the charging voltage and / or charging current provided by the power adapter 10 to both ends of the battery 30. In order to realize the direct charging mode, the embodiment of the present application introduces a control circuit with a communication function in the battery management circuit 20, namely, a communication control circuit 23. The communication control circuit 23 can maintain communication with the power supply device 10 during the direct charging process to form a closed-loop feedback mechanism, so that the power supply device 10 can know the status of the battery in real time, thereby continuously adjusting the charging voltage and / or charging current injected into the first charging channel to ensure that the charging voltage and / or charging current provided by the power supply device 10 match the voltage and / or current currently required by the battery 30.

[0115] The solution in the embodiment of the present application can also be applied in the wireless charging process.

[0116] Traditional wireless charging technology generally connects a power supply device (such as an adapter) to a wireless charging device (such as a wireless charging base), and transmits the output power of the power supply device to the device to be charged wirelessly (such as electromagnetic waves) through the wireless charging device, thereby wirelessly charging the device to be charged. The device to be charged can be the electronic device mentioned above.

[0117] Wireless charging methods are primarily categorized by their principles: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves. Currently, mainstream wireless charging standards include Qi, the Power Matters Alliance (PMA), and the Alliance for Wireless Power (A4WP). Both Qi and PMA utilize magnetic coupling for wireless charging, while the A4WP utilizes magnetic resonance.

[0118] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0119] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in 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. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0120] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0121] When used in this application, although the terms "first," "second," etc. may be used in this application to describe various devices, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device can be called a second device, and similarly, a second device can be called a first device, without changing the meaning of the description, as long as all occurrences of "first device" are renamed consistently and all occurrences of "second device" are renamed consistently. The first device and the second device are both devices, but they do not have to be the same device.

[0122] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0123] In addition, each functional unit in each embodiment of the present application 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.

[0124] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An adapter, characterized in that: include: at least one filter capacitor, wherein the capacity of the at least one filter capacitor is less than a preset threshold value and is used to filter the rectified AC current to obtain a pulsating DC current; A voltage transformation module, configured to transform the pulsating DC current to obtain a voltage and current for charging the device to be charged; wherein the voltage transformation module comprises: a switch module and a transformer; The adapter further comprises: A first detection module, configured to detect the voltage and / or current of the pulsating direct current; an operational amplifier module, configured to convert the voltage value of the pulsating DC current into a current value, one end of the operational amplifier module being connected to the output end of the at least one filter capacitor, and the other end being connected to the first detection module; the first detection module detecting the voltage and / or current of the pulsating DC current including detecting the current value obtained after the conversion by the operational amplifier module; a control module, configured to control the on-time of the switch module according to the converted current value, so as to control the output power of the transformer; The control module is further configured to reduce the on-time of the switch module when the converted current value is less than a second preset current threshold.

2. The adapter according to claim 1, wherein: The control module is further configured to control the on-time of the switch module according to the voltage and / or current detection results of the pulsating direct current, so as to control the output power of the transformer.

3. The adapter according to claim 2, wherein: The control module is further configured to: reduce the on-time of the switch module when the voltage of the pulsating direct current is less than a first preset voltage threshold; and / or When the current of the pulsating direct current is less than a first preset current threshold, the on-time of the switch module is reduced.

4. The adapter according to claim 2, wherein: The adapter further comprises: A second detection module, configured to detect the current and / or voltage outputted by the secondary side of the transformer; The control module is further used to: control the conduction time of the switch module according to the current and / or voltage detection results output by the secondary side of the transformer, combined with the voltage and / or current detection results of the pulsating direct current, so as to control the output power of the transformer.

5. The adapter according to any one of claims 2 to 4, characterized in that The adapter further comprises: The clamping module is used to absorb the leakage inductance energy of the transformer and release the absorbed energy to the output end of the transformer when the switch module is disconnected.

6. The adapter according to any one of claims 2 to 4, characterized in that The adapter further includes a communication module for receiving voltage and / or current information fed back by the device to be charged; The control module is further configured to control the on-time of the switch module according to the feedback voltage and / or current information in combination with the voltage and / or current detection results of the pulsating direct current.

7. The adapter according to claim 4, wherein: The adapter further includes a communication module for receiving voltage and / or current information fed back by the device to be charged; The control module is further configured to control the on-time of the switch module according to at least one of the following information: The feedback voltage and / or current information, the current and / or voltage detection result outputted by the secondary side of the transformer, and the voltage and / or current detection result of the pulsating direct current.

8. The adapter according to any one of claims 1 to 4, characterized in that The filter capacitor includes a chip capacitor, a film capacitor, or an electrolytic capacitor with a capacity smaller than the preset threshold.

9. The adapter according to any one of claims 1 to 4, characterized in that The number of the filter capacitors is determined by the required capacitance.

10. The adapter according to any one of claims 1 to 4, characterized in that The filter capacitor includes a plurality of capacitors connected in series or a plurality of capacitors connected in parallel.

11. A charging method, characterized in that: The charging method is applied to an adapter, the adapter including at least one filter capacitor and a voltage conversion module, and the method includes: Filtering the rectified AC current to obtain a pulsating DC current; Transforming the pulsating direct current to obtain a voltage and current for charging the device to be charged; The adapter further includes an operational amplifier module and a first detection module, one end of the operational amplifier module is connected to the output end of the at least one filter capacitor, and the other end is connected to the first detection module, the voltage transformation module includes a switch module and a transformer, and the method further includes: Converting the voltage value of the pulsating direct current into a current value; Detecting the voltage and / or current of the pulsating direct current includes: detecting the current value obtained after conversion; Wherein, the method further includes: controlling the on-time of the switch module according to the converted current value; The controlling the on-time of the switch module according to the converted current value includes: When the converted current value is less than a second preset current threshold, the on-time of the switch module is reduced.

12. The method according to claim 11, characterized in that The method further comprises: According to the voltage and / or current detection results of the pulsating direct current, the conduction time of the switch module is controlled to control the output power of the transformer.

13. The method according to claim 12, characterized in that The controlling the on-time of the switch module according to the voltage and / or current detection result of the pulsating direct current includes: When the voltage of the pulsating direct current is less than a first preset voltage threshold, reducing the on-time of the switch module; and / or When the current of the pulsating direct current is less than a first preset current threshold, the on-time of the switch module is reduced.

14. The method according to claim 12, characterized in that The adapter further includes a second detection module, and the method further includes: detecting a current and / or a voltage outputted by the secondary side of the transformer; The controlling the on-time of the switch module according to the voltage and / or current detection result of the pulsating direct current includes: According to the current and / or voltage detection results outputted from the secondary side of the transformer, combined with the voltage and / or current detection results of the pulsating direct current, the conduction time of the switch module is controlled to control the output power of the transformer.

15. The method according to any one of claims 12 to 14, characterized in that The method further comprises: When the switch module is disconnected, the leakage inductance energy of the transformer is absorbed and the absorbed energy is released to the output end of the transformer.

16. The method according to any one of claims 12 to 13, characterized in that The adapter further includes a communication module, and the method further includes: Receiving voltage and / or current information fed back by the device to be charged; The controlling the on-time of the switch module according to the voltage and / or current detection results of the pulsating direct current includes: The conduction time of the switch module is controlled according to the feedback voltage and / or current information and in combination with the voltage and / or current detection results of the pulsating direct current.

17. The method according to claim 14, characterized in that The adapter further includes a communication module, and the method further includes: Receiving voltage and / or current information fed back by the device to be charged; The controlling the on-time of the switch module according to the current and / or voltage detection result outputted from the secondary side of the transformer in combination with the voltage and / or current detection result of the pulsating direct current comprises: Controlling the on-time of the switch module according to at least one of the following information: The feedback voltage and / or current information, the current and / or voltage detection result outputted by the secondary side of the transformer, and the voltage and / or current detection result of the pulsating direct current.

18. The method according to any one of claims 11 to 14, characterized in that The filter capacitor includes a chip capacitor or a film capacitor.

19. The method according to any one of claims 11 to 14, characterized in that The number of the filter capacitors is determined by the required capacitance.

20. The method according to any one of claims 11 to 14, characterized in that The filter capacitor includes a plurality of capacitors connected in series or a plurality of capacitors connected in parallel.

21. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the method according to any one of claims 11 to 20.

Images