CN113013967A - Charging device and electronic apparatus - Google Patents
Charging device and electronic apparatus Download PDFInfo
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- CN113013967A CN113013967A CN202110269922.2A CN202110269922A CN113013967A CN 113013967 A CN113013967 A CN 113013967A CN 202110269922 A CN202110269922 A CN 202110269922A CN 113013967 A CN113013967 A CN 113013967A
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- 238000004146 energy storage Methods 0.000 claims abstract description 124
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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Abstract
The application discloses charging device and electronic equipment belongs to electron technical field. The charging device comprises an input rectifying module, an input filtering module, a voltage conversion module, an output filtering module, an energy storage module and a control module, wherein the input rectifying module is used for rectifying received power voltage and outputting rectified voltage, the input filtering module is used for filtering the rectified voltage, and the voltage conversion module and the output filtering module are used for converting and filtering the filtered rectified voltage so as to output charging voltage. The control module controls the energy storage module to store power under a first preset condition and controls the energy storage module to discharge power under a second preset condition. The energy storage module is used for supplying power to the charging device when the charging voltage is low, so that the situation that an input filtering module with large volume is arranged in the charging device can be avoided, and the volume of the charging device can be reduced.
Description
Technical Field
The application belongs to the technical field of electronics, concretely relates to charging device and electronic equipment.
Background
With the development of electronic technology, electronic devices such as mobile phones, notebook computers, wearable devices and the like have increasingly wide application range in work and life. In order to meet the demand of fast pace, higher requirements are put on the charging speed of electronic equipment.
In the prior art, in order to increase the charging speed of the electronic device, a high-power charging device is generally used for charging the electronic device, but the high-power charging device has a large volume and is inconvenient to carry and use.
Disclosure of Invention
An object of the embodiments of the present application is to provide a charging device and an electronic apparatus, which can solve the problem that a large-power charging device is large in size.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging device, including: the device comprises an input rectifying module, an input filtering module, a voltage conversion module, an output filtering module, an energy storage module and a control module;
the output end of the input rectifying module is respectively connected with the input filtering module and the voltage conversion module in parallel, and is used for rectifying the received power supply voltage and outputting a first rectified voltage;
the input filtering module is used for filtering the first rectified voltage, so that the voltage conversion module receives a filtered second rectified voltage;
the output end of the voltage conversion module is respectively connected with the energy storage module and the output filtering module in parallel and is used for converting the second rectified voltage to obtain a converted voltage;
the output filtering module is used for filtering the converted voltage to enable the voltage conversion module to output the filtered charging voltage;
the control module is respectively connected with the energy storage module and the voltage conversion circuit, and the voltage conversion circuit is composed of the input rectification module, the input filtering module, the voltage conversion module and the output filtering module; the control module is used for controlling the energy storage module to store electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a first preset condition, and controlling the energy storage module to discharge electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a second preset condition.
In a second aspect, an embodiment of the present application provides an electronic device, including the charging apparatus described in the first aspect.
In the embodiment of the application, the charging device comprises an input rectifying module, an input filtering module, a voltage conversion module, an output filtering module, an energy storage module and a control module, wherein the input rectifying module is used for rectifying the received power voltage and outputting a first rectified voltage, and the input filtering module is used for filtering the first rectified voltage so that the voltage conversion module receives a second rectified voltage after filtering; the voltage conversion module is used for converting the second rectified voltage to obtain a converted voltage, and the output filtering module is used for filtering the converted voltage to enable the voltage conversion module to output the filtered charging voltage. The control module is used for controlling the energy storage module to store electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a first preset condition, and controlling the energy storage module to discharge electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a second preset condition. The energy storage module is used for supplying power to the charging device when the charging voltage is low, so that the input filter module with large volume can be prevented from being used for smooth filtering, the input filter module with large volume can be prevented from being arranged in the charging device, and the volume of the charging device can be reduced.
Drawings
Fig. 1 is a schematic circuit structure diagram of a charging device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a waveform of a power supply voltage provided by an embodiment of the present application;
FIG. 3 is a schematic waveform diagram of a first rectified voltage and a second rectified voltage provided by an embodiment of the present application;
FIG. 4 is a schematic waveform diagram of a charging voltage, a first rectified voltage and a second rectified voltage provided by an embodiment of the present application;
fig. 5 is a schematic structural diagram of another charging device provided in the embodiment of the present application;
fig. 6 is a schematic structural diagram of another charging device provided in the embodiment of the present application;
fig. 7 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
In order to facilitate understanding of the technical solution of the present application, first, a basic circuit principle of a charging device related to the present application is briefly introduced, as shown in fig. 1, fig. 1 is a schematic circuit structure diagram of a charging device provided in an embodiment of the present application, where the charging device includes an input rectifying module, an input filtering module, a voltage converting module, an output filtering module, and a control module. The input rectifying module, the input filtering module, the voltage conversion module and the output filtering module form a voltage conversion circuit, and the voltage conversion circuit converts power supply voltage into charging voltage to charge the electronic equipment. The voltage conversion module may include a power conversion module and an output rectification module, and the control module may include a power logic control module, a secondary side logic control module, and a feedback module. The input rectifying module and the input filtering module are primary circuits in the voltage conversion circuit, the output rectifying module and the output filtering module are secondary circuits in the voltage conversion circuit, and the power conversion module is used for connecting the primary circuits and the secondary circuits. The primary circuit is used for converting alternating-current power supply voltage into high-voltage direct current, the power conversion module is used for converting the high-voltage direct current into low-voltage alternating current, the secondary circuit is used for converting the low-voltage alternating current into low-voltage direct current, and the low-voltage direct current is charging voltage.
For example, the power supply voltage of the charging device may be 220v ac voltage provided by an ac power grid, as shown in fig. 2, fig. 2 is a waveform schematic diagram of a power supply voltage provided in an embodiment of the present application, the waveform of the power supply voltage is a sine wave 201, an abscissa in fig. 2 is a time axis in seconds, and an ordinate is a voltage axis in volts. As shown in fig. 1, an ac input interface for connecting to an ac power grid may be provided in the charging device, and an input end of the input rectifying module is connected to the ac input interface to receive 220V ac voltage provided by the ac power grid. The input rectifying module may be a high-voltage rectifier, and the high-voltage rectifier may rectify the received ac voltage to obtain a dc voltage, i.e., a first rectified voltage. The input filter module may be an energy storage filter capacitor 101 shown in fig. 1, one end of the energy storage filter capacitor 101 is connected to the output end of the input rectification module, the other end of the energy storage filter capacitor 101 is grounded, and the energy storage filter capacitor 101 may perform smoothing filtering on the first rectified voltage to obtain a smooth second rectified voltage. As shown in fig. 3, fig. 3 is a schematic waveform diagram of a first rectified voltage and a second rectified voltage provided in an embodiment of the present application, in fig. 3, a clock wave 301 is a waveform of the first rectified voltage, and a sawtooth wave 302 is a waveform of the second rectified voltage.
Referring to fig. 3, since the waveform of the first rectified voltage is a steamed bread wave, the maximum voltage value of the first rectified voltage may reach 310V, the minimum voltage value is 0V, and the ripple of the first rectified voltage is large. The input filtering module can filter out alternating current components in the first rectified voltage, and can reduce ripple factors of the first rectified voltage to obtain second rectified voltage with smooth waveform. As shown in fig. 3, the sawtooth wave 302 has a smaller ripple and a smoother waveform than the steamed bun wave 301, and the sawtooth wave 302 is the output voltage of the primary circuit.
After the second rectified voltage is obtained, the power conversion module 102 in the voltage conversion module may invert the second rectified voltage to obtain a secondary input voltage, where the secondary input voltage is a low-voltage alternating current; the output rectifying module may rectify the low-voltage ac output by the power conversion module 102 to obtain low-voltage dc, i.e., a converted voltage; the output filtering module can carry out smooth filtering on the converted voltage to obtain charging voltage, and the charging voltage can be output through a direct current output interface in the charging device to charge the electronic equipment connected to the direct current output interface. For example, the power conversion module may be an inverter, and the inverter may invert the 310V high voltage dc power into 9V low voltage ac power, that is, invert the sawtooth wave 302 in fig. 3 into 9V low voltage ac power. The output rectifying module can be a low-voltage rectifier, and the low-voltage rectifier can rectify the 9V low-voltage alternating current into 9V low-voltage direct current. The output filtering module may be an energy storage filtering capacitor 103 shown in fig. 1, and the energy storage filtering capacitor 103 may filter the low-voltage direct current of 9V to obtain a smooth low-voltage direct current, that is, a charging voltage of 9V. The output end of the output rectifying module can be connected with the direct current output interface, and the charging voltage is output through the direct current output interface.
In the conventional high-power charging device, in order to smooth the second rectified voltage, the first rectified voltage needs to be smoothed by using the energy storage smoothing capacitor 101 with a large capacity. When the capacity of the energy storage filter capacitor 101 is increased, the volume of the input filter module is increased, and finally the volume of the charging device is increased. When the size of the input filter module is reduced, the capacity of the energy storage filter capacitor 101 is reduced, and when the capacity of the energy storage filter capacitor 101 is smaller, a smaller voltage value may occur in the second rectified voltage, so that the power conversion module 102 cannot obtain enough electric energy from the primary side circuit, and therefore the secondary side input voltage is reduced, and when the secondary side input voltage is reduced, the charging voltage is reduced, and the electronic device cannot be normally charged. As shown in fig. 4, fig. 4 is a waveform diagram of a charging voltage, a first rectified voltage and a second rectified voltage provided in an embodiment of the present application, in fig. 4, a straight line 401 in a first coordinate system represents a lowest operating voltage of a power conversion module, a steamed bread wave 402 represents the first rectified voltage, a sawtooth wave 403 represents the second rectified voltage, a straight line 404 in a second coordinate system is the charging voltage, and time axes of the first coordinate system and the second coordinate system are the same. As shown in fig. 4, when the capacity of the energy storage filter capacitor 101 is small, the second rectified voltage is lower than the lowest operating voltage of the power conversion module between the time T1 and the time T2, and the secondary input voltage output by the power conversion module is lower, so that the converted voltage rectified by the output rectification module is lower, and the charging voltage filtered by the output filter module is lower than the voltage value shown by the straight line 404, so that the electronic device cannot be normally charged. The time period between the time T1 and the time T2 is between two adjacent sawtooth waves, the time period when the second rectified voltage is lower than the lowest operating voltage of the power conversion module occurs periodically in the second rectified voltage because the power supply voltage is a periodic voltage.
It should be noted that the low voltage in this embodiment refers to a charging voltage of an electronic device such as a mobile phone, a notebook computer, and a wearable device, and the charging voltage is, for example, a low dc voltage such as 9V or 5V. High voltage refers to high voltage relative to the charging voltage, such as 220V ac voltage from the ac grid output, or rectified 310V dc voltage.
In order to solve the problem of a large volume of the charging device, the embodiment provides the charging device and the electronic device. The charging device provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another charging device provided in an embodiment of the present application, and as shown in fig. 5, the charging device may include: the device comprises an input rectifying module, an input filtering module, a voltage conversion module, an output filtering module, a control module and an energy storage module.
The output end of the input rectifying module is respectively connected with the input filtering module and the voltage conversion module in parallel, and is used for rectifying the received power supply voltage and outputting a first rectified voltage; the input filtering module is used for filtering the first rectified voltage, so that the voltage conversion module receives the filtered second rectified voltage; the output end of the voltage conversion module is respectively connected with the energy storage module and the output filtering module in parallel and is used for converting the second rectified voltage to obtain converted voltage; the output filtering module is used for filtering the converted voltage, so that the voltage conversion module outputs the filtered charging voltage.
In one embodiment, the input rectifying module may be a high voltage rectifier, and the input filtering module may be the energy storage filtering capacitor 501 shown in fig. 5. The input rectifying module may be connected to an ac power grid through an electromagnetic interference (EMI) filtering module and an ac input interface to receive an ac voltage output by the ac power grid. As shown in fig. 5, an ac input interface may be provided in the charging device, and an input end of the ac input interface is used for connecting to an ac power grid to receive an ac voltage. The output end of the alternating current input interface is connected with the input end of the EMI filtering module, the output end of the EMI filtering module is connected with the input end of the input rectifying module, one end of the energy storage filtering capacitor 501 is connected with the output end of the input rectifying module, and the other end of the energy storage filtering capacitor is grounded. The alternating current input interface, the EMI filtering module, the input rectifying module and the input filtering module form a primary circuit in the voltage conversion circuit, the alternating current input interface forms an input end of the primary circuit, an output end of the input rectifying module forms an output end of the primary circuit, and the primary circuit is used for rectifying power supply voltage to obtain first rectified voltage and performing smooth filtering on the first rectified voltage to obtain second rectified voltage.
In practical application, when the EMI filter module is disposed in the primary circuit, the EMI filter module can prevent electromagnetic interference in the ac power grid from entering the charging device, so that the charging device can stably operate.
In one embodiment, the voltage conversion module may include a power conversion module and an output rectification module; the input end of the power conversion module is respectively connected with the input filtering module and the input rectifying module; the output end of the power conversion module is connected with the input end of the output rectification module; the output end of the output rectifying module is connected with the output filtering module. For example, as shown in fig. 5, the power conversion module 503 may be an inverter, the output rectifying module may be a low-voltage rectifier, the output filtering module may be an energy storage filter capacitor 502, one end of the energy storage filter capacitor 502 is connected to the output end of the output rectifying module, and the other end is grounded. The charging device may further include a dc output interface, and the dc output interface is respectively connected to the output end of the output rectifying module and the energy storage filter capacitor 502. The output rectifying module, the output filtering module and the direct current output interface form a secondary circuit in the voltage conversion circuit.
In this embodiment, the energy storage filter capacitor 501 is disposed between the input rectifying module and the power converting module, and the energy storage filter capacitor 501 is connected to the output end of the input rectifying module and the input end of the power converting module 503 respectively. With reference to the above example, when the power voltage is 220V ac voltage, in the primary circuit, the power voltage is first filtered by the EMI filter module, and then is rectified by the input rectifier module and smoothed by the energy storage filter capacitor 501, so that the 220V ac voltage is converted into a second rectified voltage with a smooth waveform. The power conversion module 503 may invert the second rectified voltage into an ac voltage of 9V, i.e., a secondary input voltage, and input and output the secondary input voltage to and from the rectification module. In the secondary side circuit, the output rectifying module firstly rectifies 9V alternating current voltage to obtain 9V conversion voltage, and the conversion voltage is direct current voltage. Then, the energy storage filter capacitor 502 performs smoothing filtering on the converted voltage to obtain a charging voltage with a smooth waveform. When the direct current output interface is connected with the electronic equipment, the electronic equipment can be charged through the charging voltage. The specific structures and types of the ac input interface, the EMI filter module, the input rectifier module, the input filter module, the power conversion module, the output rectifier module, and the output filter module may be set as required, which is not limited in this embodiment.
The control module is respectively connected with the energy storage module and the voltage conversion circuit, and the voltage conversion circuit consists of an input rectifying module, an input filtering module, a voltage conversion module and an output filtering module; the control module is used for controlling the energy storage module to store electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a first preset condition, and controlling the energy storage module to discharge electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a second preset condition.
In this embodiment, the first preset condition indicates that the input voltage of the power conversion module is greater than or equal to the lowest operating voltage of the power conversion module, and the charging voltage output by the charging device is stabilized within a preset voltage range, so as to charge the electronic device. The second preset condition indicates that the input voltage of the power conversion module is lower than the lowest working voltage of the power conversion module, the charging voltage cannot be stabilized within a preset voltage range, and the electronic device cannot be charged. As shown in fig. 4, the voltage value of the sawtooth wave 403 is lower than the lowest operating voltage indicated by the straight line 401 between the time T1 and the time T2, and the charging voltage becomes lower and cannot be stabilized within the preset voltage range due to the fact that the voltage value of the sawtooth wave 403 is lower than the lowest operating voltage between the time T1 and the time T2, and the voltage state of the voltage conversion circuit meets the second preset condition. In other time periods except for the time between T1 and T2, the voltage value of the sawtooth wave 403 is not lower than the lowest working voltage of the power conversion module, the charging voltage is stabilized within a preset voltage range, and the voltage state of the voltage conversion circuit meets a first preset condition.
Optionally, the control module includes a detection sub-module and a control sub-module; the detection submodule is connected with the control submodule; the control submodule is connected with the energy storage module; the detection submodule is also connected with the output end of the input rectification module, or the detection submodule is also connected with the output end of the voltage conversion module.
Optionally, the detection submodule is further configured to output a discharge signal to the control submodule when it is detected that the voltage state of the voltage conversion circuit meets a second preset condition; the control submodule is also used for determining that the voltage state of the voltage conversion circuit meets a second preset condition after receiving the discharge signal; or the detection submodule is also used for detecting the voltage state of the voltage conversion circuit and sending the voltage state to the control submodule.
In an embodiment, in a case that the detection submodule is further connected to the output terminal of the voltage conversion module, a third connection point between the detection submodule and the output rectification module is located on a side of a fourth connection point away from the output rectification module, and the fourth connection point is a connection point between the output filtering module and the output rectification module.
In this embodiment, the control module includes a detection submodule and a control submodule, the detection submodule may be disposed at an output end of the voltage conversion module to detect the charging voltage, and the control submodule may determine that the voltage state of the voltage conversion circuit meets a first preset condition when the charging voltage is not lower than a preset charging threshold. Conversely, the control sub-module may determine that the voltage state of the voltage conversion circuit meets a second preset condition when the charging voltage is lower than the preset charging threshold. As shown in fig. 5, a connection point between the detection sub-module and the output rectifier module is a third connection point, a connection point between the energy storage filter capacitor 502 and the output rectifier module is a fourth connection point, and the third connection point is located behind the fourth connection point and is far away from the output rectifier module. At this time, the detection submodule may detect the charging voltage obtained after filtering by the output filtering module.
Optionally, a fifth connection point between the energy storage module and the output rectification module is located on a side of the third connection point away from the output rectification module.
Illustratively, the preset charging threshold may be a charging voltage as indicated by line 404 in fig. 4, and the detection submodule may be a voltage detector. As shown in fig. 5, the detection sub-module is disposed between the energy storage filter capacitor 502 and the energy storage module, a connection point between the energy storage module and the output rectifying module is a fifth connection point, and the fifth connection point is located on the right side of the third connection point and is far away from the output rectifying module. The detection submodule may detect a charging voltage between the energy storage filter capacitor 502 and the energy storage module, and send the charging voltage to the control submodule. The control submodule receives the charging voltage sent by the detection submodule, and can determine that the voltage state of the voltage conversion circuit meets a second preset condition when the charging voltage is lower than a preset charging threshold value, namely, the charging voltage is lower than a voltage value shown by a straight line 404. On the contrary, when the charging voltage is not lower than the preset charging threshold, the control sub-module determines that the voltage state of the voltage conversion circuit meets the first preset condition.
In one embodiment, the charging device further comprises a charging interface; the charging interface is located on one side, far away from the output rectifying module, of the fifth connecting point and is connected with the output rectifying module, the output filtering module and the energy storage module in parallel respectively. As shown in fig. 5, the charging interface is a dc output interface, the charging interface is disposed on one side of the energy storage module away from the output rectifying module, that is, on one side of the fifth connection point away from the output rectifying module, and the charging interface is connected to the output rectifying module, the energy storage filter capacitor 502, and the energy storage capacitor 504, respectively. The charging interface is arranged to facilitate the connection of the charging device and the electronic equipment, so as to charge the electronic equipment.
In practical application, the detection submodule is arranged behind the output filtering module, the charging voltage obtained by filtering can be detected, and whether the charging device can charge the electronic equipment or not can be determined more accurately.
In another embodiment, the detection sub-module may send an electrical discharge signal to the control sub-module to notify the control sub-module that the voltage state of the voltage conversion circuit meets the second preset condition. With reference to the foregoing example, after the detection submodule detects the charging voltage, if it is determined that the charging voltage is lower than the preset charging threshold, it may be determined that the voltage state of the voltage conversion circuit meets the second preset condition, and at this time, the detection submodule may send the discharge signal to the control submodule. Accordingly, the control sub-module may determine that the voltage state of the voltage conversion circuit meets the second preset condition after receiving the discharging signal. On the contrary, after the detection submodule detects the charging voltage, if the charging voltage is judged to be not lower than the preset charging threshold, it can be determined that the voltage state of the voltage conversion circuit meets the first preset condition, and at this time, the detection submodule can send a discharging stop signal to the control submodule. The control sub-module may determine that the state of the voltage conversion circuit meets a second preset condition after receiving the discharge stopping signal.
In practical application, the detection submodule detects the charging voltage and determines the voltage state of the voltage conversion circuit according to the charging voltage, so that whether the charging device can charge the electronic equipment can be more accurately determined.
In this embodiment, the control sub-module may include a power logic control module, a secondary side logic control module, and a feedback module shown in fig. 5, where the power logic control module is connected to the secondary side logic control module through the feedback module in a communication manner. The secondary side logic control module can be connected with the direct current output interface to determine whether the direct current output interface is connected with the electronic equipment to be charged. When the direct current output interface is connected with the electronic equipment, the secondary side logic control module can send a charging signal to the power logic control module through the feedback module. Correspondingly, after receiving the charging signal, the power logic control module may send a close signal to the power switch, and the power switch may start the power conversion module to operate, output the secondary input voltage to the secondary circuit, and generate the charging voltage for the electronic device. On the contrary, when the direct current output interface is not connected with the electronic device, the secondary side logic control module can send a stop signal to the power logic control module through the feedback module, after receiving the stop signal, the power logic control module can send a disconnection signal to the power switch, the power switch can stop the power conversion module, at this moment, the secondary side circuit cannot generate the charging voltage, and the charging device stops charging.
For example, the power switch may be an N-Metal-Oxide-Semiconductor field effect transistor (NMOS) shown in fig. 5, a gate of the NMOS 506 is connected to the power logic control module, a drain of the NMOS is connected to the control terminal of the power conversion module, and a source of the NMOS is grounded. After receiving the charging signal, the power logic control module may output a high level signal, i.e., a close signal, to the gate of the NMOS transistor 506. At this time, the NMOS transistor 506 is turned on, and the power conversion module 503 starts to operate. Conversely, after the power logic control module receives the stop signal, it may output a low level signal, i.e., a turn-off signal, to the gate of the NMOS transistor 506. At this time, the NMOS transistor 506 is turned off, and the power conversion module 503 stops operating. The specific structure of the control submodule can be set according to the requirement, and this embodiment does not limit this.
Optionally, the energy storage module comprises an energy storage unit and a discharge switch connected in series; the discharge switch is connected with the control module; the control module is used for controlling the discharge switch to be conducted under the condition that the voltage state of the voltage conversion circuit is determined to accord with the second preset condition.
In one embodiment, the energy storage module may include an energy storage unit for storing an amount of electricity and a discharge switch for controlling the energy storage unit. As shown in fig. 5, the energy storage unit may be an energy storage capacitor 504, and the discharge switch may be an NMOS transistor 505. The energy storage module is arranged between the detection submodule and the direct current output interface, one end of the energy storage capacitor 504 is connected with the direct current output interface, the other end of the energy storage capacitor is connected with the drain electrode of the NMOS tube 505, the source electrode of the NMOS tube 505 is grounded, and the grid electrode of the NMOS tube is connected with the secondary side logic control module, namely the control submodule. With reference to the above example, the secondary side logic control module may output a high level signal to the gate of the NMOS transistor 505 to control the NMOS transistor 505 to be turned on, that is, control the discharge switch to be turned on, so that the energy storage capacitor 505 is in a working state and discharges to the dc output interface, when it is determined that the voltage state of the voltage conversion circuit meets the second preset condition. The voltage output by the energy storage capacitor 505 can stabilize the charging voltage output by the dc output interface within a preset voltage range, so that the charging device can normally charge the electronic device. The specific structure and the preset voltage range of the energy storage module can be set according to requirements, and the implementation is not limited to this.
It should be noted that the output voltage of the energy storage module may not be lower than the minimum value of the charging voltage and not higher than the maximum value of the charging voltage, and when the voltage value output by the output rectifying module is lower than the minimum value of the charging voltage, the energy storage module may enable the voltage value of the dc output interface to be above the minimum value of the charging voltage, so as to normally charge the electronic device. Meanwhile, when the output voltage of the energy storage module is not higher than the maximum value of the charging voltage, the damage to the electronic equipment caused by the overhigh voltage value output by the energy storage module can be avoided. Meanwhile, referring to fig. 4, the discharging time of the energy storage module is not less than the time difference between the T1 time and the T2 time, so that the energy storage module can continuously supply power to the dc output interface under the second preset condition.
In one embodiment, the capacitance value of the energy storage capacitor may be determined from the output current of the charging device. For example, if the maximum current value of the charging device is I and the time difference between T1 and T2 is T, the capacitance C of the energy storage capacitor is I × T ÷ U, and U is the charging voltage. Since the lowest operating voltage of the power conversion module can be determined according to the power conversion module, and the voltage value of the sawtooth wave 403 in fig. 4 can be determined according to the energy storage filter capacitor 501, the time difference T between the time T1 and the time T2 can be determined according to the energy storage filter capacitor 501 and the power conversion module.
In practical application, the energy storage module consists of the energy storage unit and the discharge switch, so that the energy storage module has a simple circuit structure, and the increase of the volume of the charging device can be avoided.
Optionally, the control module is further configured to control the discharge switch to be turned off or to be turned off after the discharge switch is turned on for a preset time period, in a case that it is determined that the voltage state of the voltage conversion circuit meets a third preset condition.
In this embodiment, the voltage conversion module may also charge the energy storage module, and with reference to fig. 4 and fig. 5, when the energy storage module is composed of the energy storage capacitor 504 and the NMOS transistor 505, after the energy storage capacitor 504 supplies power to the dc output interface, that is, after time T2, the voltage state of the voltage conversion circuit meets the first preset condition, at this time, the energy storage capacitor 504 is connected in parallel with the dc output interface, and the energy storage capacitor 504 is charged by the charging voltage.
For example, the secondary side logic control module may start timing when the voltage state of the voltage conversion circuit is determined to meet the second preset condition, and control the discharge switch to be turned on. The timed duration is equal to the sum of the time difference T between time T1 and time T2 and the charging time of the energy storage capacitor 504. At the time T1, the secondary side logic control module determines that the voltage state of the voltage conversion circuit meets a second preset condition, controls the energy storage capacitor 504 to supply power to the dc output interface, and starts timing; at time T2, the voltage value of the sawtooth wave 403 is higher than the lowest operating voltage of the power conversion module, the charging voltage recovers, the voltage state of the voltage conversion circuit meets the first preset condition, and the charging voltage starts to charge the energy storage capacitor 504. When the timing duration reaches the preset duration, the on duration of the discharge switch reaches the preset time period, and the energy storage of the energy storage capacitor 504 is completed. At this time, the secondary side logic control module may output a low level signal to the NMOS transistor 505, control the NMOS transistor 505 to turn off, and stop charging the energy storage capacitor 504. It should be noted that the energy storage capacitor is located in the secondary side circuit, and the capacity is small, so that charging can be completed in a short time.
In practical application, the control module controls the energy storage module to discharge to the output end of the voltage conversion module under the second preset condition, and controls the voltage conversion module to charge the energy storage module under the first preset condition, so that a charging circuit can be prevented from being added to the energy storage module in the charging device, and the size of the charging device is prevented from being increased.
Optionally, under the condition that the detection submodule is further connected to the output end of the input rectification module, the first connection point between the detection submodule and the input rectification module is located between the second connection point and the voltage conversion module, and the second connection point is a connection point between the input filtering module and the input rectification module.
Referring to fig. 6, fig. 6 is a schematic structural diagram of another charging device according to an embodiment of the present disclosure, the detection submodule may be disposed between the energy storage filter capacitor 501 and the power conversion module 503, a connection point between the energy storage filter capacitor 501 and the input rectification module is a second connection point, a connection point between the detection submodule and the input rectification module is a first connection point, and the first connection point is located behind the second connection point, that is, located between the second connection point and the voltage conversion module. At this time, the detection sub-module may detect the second rectified voltage, i.e., detect the voltage value of the sawtooth wave shown in fig. 4. The detection submodule may determine a voltage state of the voltage conversion circuit based on the second rectified voltage. For example, the detection sub-module may determine that the voltage state of the voltage conversion circuit meets the first preset condition when the second rectified voltage is not lower than the first preset rectified voltage, and determine that the voltage state of the voltage conversion circuit meets the second preset condition when the second rectified voltage is lower than the first preset rectified voltage. The first preset rectified voltage may be a voltage value of the second rectified voltage corresponding to a point where the straight line 401 intersects the sawtooth wave 403 in fig. 4.
Similarly, the detection sub-module may determine that the state of the voltage conversion circuit meets a third preset condition when it is detected that the second rectified voltage is higher than the preset turn-off threshold. At this time, the detection sub-module sends a turn-off signal to the power logic control module. As shown in fig. 4, the preset turn-off threshold is a voltage value shown by a straight line 405, and when the second rectified voltage is higher than the preset turn-off threshold, the energy storage capacitor has completed charging. The power logic control module may send a turn-off signal to the secondary side logic control module through the feedback module, and the secondary side logic control module may control the NMOS transistor 505 to be turned off, and stop charging the energy storage capacitor 504.
In another embodiment, the detection submodule may be disposed between the input rectifying module and the input filtering module, that is, the first connection point is located before the second connection point, and the detection submodule may detect the first rectified voltage. The detection submodule may determine a voltage state of the voltage conversion circuit based on the first rectified voltage. For example, the detection sub-module may determine that the voltage state of the voltage conversion circuit meets the first preset condition when the first rectified voltage is not lower than the second preset rectified voltage, and determine that the voltage state of the voltage conversion circuit meets the second preset condition when the first rectified voltage is lower than the second preset rectified voltage. The second preset rectified voltage may be a voltage value of the first rectified voltage corresponding to a point where the straight line 401 intersects the steamed bread wave 403 in fig. 4.
Similarly, the detection sub-module may determine that the state of the voltage conversion circuit meets a third preset condition when it is detected that the first rectified voltage is higher than the preset turn-off threshold. At this time, the detection sub-module sends a turn-off signal to the power logic control module. As shown in fig. 4, the preset turn-off threshold is a voltage value shown by a straight line 405, and when the first rectified voltage is higher than the preset turn-off threshold, the energy storage capacitor has completed charging. The power logic control module may send a turn-off signal to the secondary side logic control module through the feedback module, and the secondary side logic control module may control the NMOS transistor 505 to be turned off, and stop charging the energy storage capacitor 504.
After detecting the first rectified voltage and the second rectified voltage, the detection sub-module may determine a voltage state of the voltage conversion circuit according to the first rectified voltage and the second rectified voltage, and send the discharge signal to the control sub-module.
In practical application, the detection module detects the first rectified voltage or the second rectified voltage, and the first rectified voltage or the second rectified voltage determines the voltage state of the voltage conversion circuit.
In one embodiment, the energy storage filter capacitor and the energy storage capacitor may use a super capacitor, and the super capacitor may reduce the volume of the energy storage filter capacitor and the energy storage capacitor, so that the volume of the charging device may be further reduced.
To sum up, in this embodiment, the charging device includes an input rectifying module, an input filtering module, a voltage converting module, an output filtering module, an energy storage module, and a control module, where the input rectifying module is configured to rectify a received power voltage and output a first rectified voltage, and the input filtering module is configured to filter the first rectified voltage, so that the voltage converting module receives a filtered second rectified voltage; the voltage conversion module is used for converting the second rectified voltage to obtain a converted voltage, and the output filtering module is used for filtering the converted voltage to enable the voltage conversion module to output the filtered charging voltage. The control module is used for controlling the energy storage module to store electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a first preset condition, and controlling the energy storage module to discharge electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a second preset condition. The energy storage module is used for supplying power to the charging device when the charging voltage is low, so that the input filter module with large volume can be prevented from being used for smooth filtering, the input filter module with large volume can be prevented from being arranged in the charging device, and the volume of the charging device can be reduced.
With reference to fig. 4 and fig. 5, the energy storage filter capacitor 501 in the input filter module may select a capacitor with a smaller volume and capacity, and when the capacity of the energy storage filter capacitor 501 is smaller, the second rectified voltage is lower than the lowest operating voltage between time T1 and time T2, and the charging voltage becomes lower. At the moment, the energy storage module is used for supplementing electricity, so that the charging device can be charged normally. The energy storage filter capacitor 501 in the input filter module needs to perform smoothing filtering on a higher voltage, and the energy storage module performs power compensation on a lower charging voltage, so the volume of the energy storage filter capacitor is much larger than that of the energy storage module.
The embodiment of the application provides electronic equipment comprising the charging device in the embodiment.
Fig. 7 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
The electronic device 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.
In this embodiment, the electronic device may include the charging device described in the above embodiments.
Those skilled in the art will appreciate that the electronic device 700 may also include a power supply (e.g., a battery) for powering the various components, and the power supply may be logically coupled to the processor 710 via a power management system, such that the functions of managing charging, discharging, and power consumption may be performed via the power management system. The electronic device structure shown in fig. 7 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
It should be understood that in the embodiment of the present application, the input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics Processing Unit 7041 processes image data of still pictures or videos obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts of a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein. Memory 709 may be used to store software programs as well as various data, including but not limited to applications and operating systems. Processor 710 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Claims (10)
1. A charging device, comprising: the device comprises an input rectifying module, an input filtering module, a voltage conversion module, an output filtering module, an energy storage module and a control module;
the output end of the input rectifying module is respectively connected with the input filtering module and the voltage conversion module in parallel, and is used for rectifying the received power supply voltage and outputting a first rectified voltage;
the input filtering module is used for filtering the first rectified voltage, so that the voltage conversion module receives a filtered second rectified voltage;
the output end of the voltage conversion module is respectively connected with the energy storage module and the output filtering module in parallel and is used for converting the second rectified voltage to obtain a converted voltage;
the output filtering module is used for filtering the converted voltage to enable the voltage conversion module to output the filtered charging voltage;
the control module is respectively connected with the energy storage module and the voltage conversion circuit, and the voltage conversion circuit is composed of the input rectification module, the input filtering module, the voltage conversion module and the output filtering module; the control module is used for controlling the energy storage module to store electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a first preset condition, and controlling the energy storage module to discharge electricity under the condition that the voltage state of the voltage conversion circuit is determined to meet a second preset condition.
2. The charging device of claim 1,
the energy storage module comprises an energy storage unit and a discharge switch which are connected in series; the discharge switch is connected with the control module;
the control module is used for controlling the discharge switch to be conducted under the condition that the voltage state of the voltage conversion circuit is determined to meet the second preset condition.
3. A charging arrangement as claimed in claim 2,
the control module is further configured to control the discharge switch to be turned off or control the discharge switch to be turned off after the discharge switch is turned on for a preset time period, when it is determined that the voltage state of the voltage conversion circuit meets a third preset condition.
4. Charging apparatus according to any one of claims 1-3,
the control module comprises a detection submodule and a control submodule; the detection submodule is connected with the control submodule; the control sub-module is connected with the energy storage module;
the detection submodule is further connected with the output end of the input rectification module, or the detection submodule is further connected with the output end of the voltage conversion module.
5. The charging device of claim 4, wherein in a case where the detection submodule is further connected to the output terminal of the input rectification module, a first connection point between the detection submodule and the input rectification module is located between a second connection point and the voltage conversion module, and the second connection point is a connection point between the input filter module and the input rectification module.
6. The charging device of claim 4, wherein the voltage conversion module comprises: the power conversion module and the output rectification module;
the input end of the power conversion module is respectively connected with the input rectification module and the input filtering module;
the output end of the power conversion module is connected with the input end of the output rectification module;
the output end of the output rectifying module is connected with the output filtering module;
under the condition that the detection submodule is further connected with the output end of the voltage conversion module, a third connection point between the detection submodule and the output rectification module is located on one side, far away from the output rectification module, of a fourth connection point, and the fourth connection point is a connection point between the output filtering module and the output rectification module.
7. A charging arrangement as claimed in claim 6, in which a fifth connection point between the energy storage module and the output rectifying module is located on the side of the third connection point remote from the output rectifying module.
8. The charging device of claim 7, further comprising a charging interface; the charging interface is positioned on one side of the fifth connecting point, which is far away from the output rectifying module, and is respectively connected with the output rectifying module, the output filtering module and the energy storage module in parallel.
9. A charging arrangement as claimed in claim 4,
the detection submodule is further used for outputting a discharge signal to the control submodule under the condition that the voltage state of the voltage conversion circuit is detected to meet the second preset condition; the control submodule is further used for determining that the voltage state of the voltage conversion circuit meets the second preset condition after receiving the discharge signal;
or, the detection submodule is further configured to detect a voltage state of the voltage conversion circuit, and send the voltage state to the control submodule.
10. An electronic device characterized by comprising a charging apparatus according to any one of claims 1 to 9.
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