WO2022218255A1

WO2022218255A1 - Charging apparatus

Info

Publication number: WO2022218255A1
Application number: PCT/CN2022/086099
Authority: WO
Inventors: 李达寰
Original assignee: 维沃移动通信有限公司
Priority date: 2021-04-16
Filing date: 2022-04-11
Publication date: 2022-10-20
Also published as: CN112953189A; CN112953189B

Abstract

The present application belongs to the technical field of intelligent charging, and disclosed are a charging apparatus, a charging control method and apparatus and a storage medium. The charging apparatus comprises: a rectifier module, which is used for rectifying an accessed electrical signal, so as to obtain a rectified charging signal; a sampling module, which is connected to an output end of the rectifier module and is used for collecting a voltage value of the charging signal; a first filtering module, wherein a first end of the filtering module is connected to the output end of the rectifier module; a first switch device, which is connected to the first filter module, wherein the first filter module is grounded in series by means of the first switch device; and a control module, which is connected to the sampling module and the first switch device, wherein the control module is used for controlling, according to the voltage value, the first switch device to operate.

Description

charging device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202110412730.2 filed in China on Apr. 16, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The present application belongs to the technical field of intelligent charging, and specifically relates to a charging device, a charging control method, a device, and a storage medium.

Background technique

Among related technologies, fast charging technology greatly improves the charging experience. However, as the charging power increases, the requirements for harmonic suppression become more stringent. Therefore, the existing "fast charging" charging equipment is generally equipped with a power factor control (Active Power Factor Correction, APFC) module.

However, the APFC module has a large volume and a high cost, which makes the "fast charging" charging equipment expensive and is not conducive to miniaturized design.

How to effectively suppress harmonics without using APFC modules is a technical problem to be solved urgently.

SUMMARY OF THE INVENTION

The present application aims to provide a charging device, a charging control method, a device, and a storage medium, at least to achieve the technical effect of reducing the volume of the charger without using APFC under the condition of satisfying the harmonic requirements.

In a first aspect, an embodiment of the present application provides a charging device, including:

The rectifier module is used to rectify the connected electrical signal to obtain a rectified charging signal;

The sampling module is connected with the output terminal of the rectifier module, and is used for collecting the voltage value of the charging signal;

a first filter module, the first end of the first filter module is connected with the output end of the rectifier module;

a first switching device connected to a first filtering module, and the first filtering module is grounded in series through the first switching device;

The control module is connected with the sampling module and the first switching device, and the control module is used for controlling the operation of the first switching device according to the voltage value.

In the embodiment of the present application, the charging device at least includes a rectification module, a sampling module, a first filtering module, a first switching device and a control module. The rectifying module rectifies the connected AC mains to obtain a rectified DC charging signal. The DC charging signal can be adjusted by power devices such as a power change module to charge electrical equipment.

The sampling module samples the voltage of the charging signal output by the filtering module in real time, and adjusts the opening and closing of the first switching device according to the voltage, that is, controls whether the first filtering module performs charging or discharging. Specifically, when the detected voltage is low, the first switching device is controlled to be closed, and the first filter module is charged or discharged according to the actual voltage. A filter module is in a charging state, and when the input waveform is in a falling phase, that is, when the voltage is reduced, the first filter module is in a discharging phase.

When it is detected that the voltage is high, the first switching device is controlled to be turned off, and the first filter module does not work at this time, so it is equivalent to reducing the total working time of the first filter module, so that the working time of the first filter module can be limited. Within the set range, the time for the input current to charge the first filter module is reduced. Therefore, under the input voltage cycle, the time for the input current to directly supply power to the electrical equipment can be prolonged, thereby effectively reducing the output current and The harmonics caused by the different input voltage phases meet the harmonic suppression requirements of high-power charging equipment.

In a second aspect, an embodiment of the present application provides a charging control method for controlling the charging device according to the first aspect, including: collecting a charging signal output by a collection module of the charging device to determine a voltage value of the charging signal; according to the voltage value and a preset voltage threshold, the first switching device of the charging device is controlled to be turned on or off.

In a third aspect, an embodiment of the present application provides a charging control device for controlling the charging device according to the first aspect, including: a collection unit for collecting a charging signal output by a collection module of the charging device to determine the voltage of the charging signal value; the control unit is configured to control the first switching device of the charging device to be closed or open according to the voltage value and the preset voltage threshold.

In a fourth aspect, an embodiment of the present application provides a readable storage medium, where a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the charging control method of the second aspect are implemented.

In the charging device provided by the present application, by arranging a first switching device connected in series with the first filter module, the first switching device is controlled to be closed or disconnected according to the voltage value of the rectified charging signal, thereby reducing the time for the first filter module to act. , so that the charging device of the embodiment of the present application can meet the harmonic suppression requirements of the high-power charging device without setting the power factor control module, so the volume and cost of the charging device can be effectively reduced, which is beneficial to the charging device. Miniaturization, light weight and price, improve the competitiveness of "fast charging" charging products.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 shows one of the schematic structural diagrams of a charging device according to an embodiment of the present application;

FIG. 2 shows a comparison diagram of a voltage curve and a supply current curve according to an embodiment of the present application;

FIG. 3 shows the second schematic structural diagram of a charging device according to an embodiment of the present application;

FIG. 4 shows a third schematic structural diagram of a charging device according to an embodiment of the present application;

FIG. 5 shows a flowchart of a charging control method according to an embodiment of the present application

FIG. 6 shows a structural block diagram of a charging control apparatus according to an embodiment of the present application.

Reference number:

100 charging device, 102 rectifier module, 104 sampling module, 106 first filter module, 108 first switching device, 110 control module, 112 second filter module, 114 drive module, 116 third filter module, 118 fourth filter module, 120 fifth filter module, 122 second switch device, 124 third switch device, 126 fourth switch device, 128 sixth filter module, 130 first unidirectional conduction element, 132 second unidirectional conduction element, 134 third single conduction element To the conducting element, 600 charging control device, 602 acquisition unit, 604 control unit.

Detailed ways

The following will describe in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The features of the terms "first" and "second" in the description and claims of this application may expressly or implicitly include one or more of such features. In the description of this application, unless stated otherwise, "plurality" means two or more. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

The following describes a charging device, a charging device control method, a charging control device, and a storage medium according to embodiments of the present application with reference to FIGS. 1 to 6 .

In some embodiments of the present application, a charging device is provided. FIG. 1 shows one of the schematic structural diagrams of the charging device according to an embodiment of the present application. As shown in FIG. 1 , the charging device includes:

The rectification module 102 is used to rectify the connected electrical signal to obtain a rectified charging signal;

The sampling module 104 is connected to the output end of the rectification module 102, and is used for collecting the voltage value of the charging signal;

a first filter module 106, the first end of the first filter module 106 is connected to the output end of the rectifier module 102;

The first switching device 108 is connected to the first filtering module 106, and the first filtering module 106 is connected to ground in series through the first switching device 108;

The control module 110 is connected to the sampling module 104 and the first switching device 108 , and the control module 110 is configured to control the operation of the first switching device 108 according to the voltage value.

In the embodiment of the present application, the charging device 100 at least includes a rectifying module 102 , a sampling module 104 , a first filtering module 106 , a first switching device 108 and a control module 110 . The rectification module 102 rectifies the connected AC mains to obtain a rectified DC charging signal. The DC charging signal can be adjusted by power devices such as a power change module to charge electrical equipment. .

The sampling module 104 samples the voltage of the charging signal output by the filtering module in real time, and adjusts the opening and closing of the first switching device 108 according to the voltage, that is, controls whether the first filtering module 106 performs charging or discharging. Specifically, when the detected voltage is low, the first switching device 108 is controlled to be closed, and the first filter module 106 is charged or discharged according to the actual voltage at this time, wherein, when the input waveform is in the rising stage, that is, the voltage rising stage , the first filtering module 106 is in a charging state, and when the input waveform is in a falling phase, that is, when the voltage is reduced, the first filtering module 106 is in a discharging phase.

When it is detected that the voltage is high, the first switching device 108 is controlled to be turned off, and the first filtering module 106 does not work at this time, which is equivalent to reducing the total working time of the first filtering module 106, so that the The working time can be limited within the set range, that is, the time for the input current to charge the first filter module 106 is reduced. Therefore, under the input voltage cycle, the time for the input current to directly supply power to the electrical equipment can be extended, which can effectively Reduce the harmonics caused by the difference between the output current and the input voltage phase, so as to meet the needs of high-power charging equipment for harmonic suppression.

By applying the embodiments provided in this application, by setting the first switching device 108 in series with the first filtering module 106, the first switching device 108 is controlled to be turned on or off according to the voltage value of the rectified charging signal, thereby reducing the number of first switching devices. The working time of the filter module 106 enables the charging device 100 of the embodiment of the present application to meet the harmonic suppression requirements of the high-power charging device 100 without setting the power factor control module 110 , so that the charging device 100 can be effectively reduced. The volume and cost of the charging device 100 are beneficial to the miniaturization, light weight and price reduction of the charging device 100, and improve the competitiveness of the "fast charging" type of charging products.

In some embodiments of the present application, as shown in FIG. 1 , the charging device 100 further includes: a second filter module 112 , the first section of the second filter module 112 is connected to the first end of the first filter module 106 , the second filter module 112 The second end of the second filter module 112 is grounded.

In the embodiment of the present application, the charging device 100 further includes a second filter module 112, the first end of the second filter module 112 is connected to the output end of the rectifier module 102, and the second end of the second filter module 112 is grounded, so that the first end of the second filter module 112 is connected to the output end of the rectifier module 102. The second filter module 112 is connected in parallel with the first filter module 106 . When the charging device adjusts the first switching device 108 to switch on or off according to the voltage value of the charging signal output by the rectifier module 102, the voltage change in the circuit will be clamped by the second filter module 112, so as to avoid cutting/disconnecting When the first filter module 106 is connected, the voltage in the circuit changes rapidly, resulting in overvoltage or overcurrent, which can effectively protect the components in the charging device 100 , especially the precise components such as the control module 110 , which work stably.

In some embodiments of the present application, as shown in FIG. 1 , the charging device 100 further includes:

The driving module 114 is connected to the control module 110 and the first switching device 108, and the driving module 114 is used to drive the first switching device 108 to open or close according to the control signal of the control module 110;

In the embodiment of the present application, the charging device 100 includes a driving module 114, and the driving module 114 can respond to a control command from the control module 110 and generate a corresponding driving signal according to the control command, thereby driving the first switching device 108 to change the conduction state. The first switching device 108 is a controllable switching device, and the first switching device 108 can change state according to the driving signal, and the driving signal includes a closing driving signal and an opening driving signal, which correspond to closing the first switching device 108 and opening the first switching device 108 respectively. switching device 108 .

In some embodiments of the present application, the control module 110 is further configured to: control the first switching device 108 to turn off when the voltage value is greater than the preset first voltage threshold value, and when the voltage value is less than or equal to the first voltage threshold value In the case of , the first switching device 108 is controlled to be closed.

In the embodiment of the present application, if the voltage value of the charging signal collected by the sampling module 104 is greater than the preset first voltage threshold, the control module 110 generates a corresponding disconnection control signal, and the control drive module 114 generates a disconnection drive signal, The first switching device 108 is driven to turn off, and at this time, the first filter module 106 is cut off from the circuit, neither charging nor discharging.

Correspondingly, if the voltage value of the charging signal collected by the acquisition module is less than or equal to the first voltage threshold, the control module 110 generates a corresponding closing control signal, and the control driving module 114 generates a closing drive signal to drive the first switching device 108 to close, At this time, the first filter module 106 is connected to the circuit. In the voltage drop stage, if the voltage value is lower than the voltage value of the first filter module 106, the first filter module 106 discharges compensation. In the voltage rise stage, if the voltage value is higher than the voltage value of the first filter module 106 A voltage value of the filter module 106, the first filter module 106 is charged.

Specifically, in the embodiment shown in FIG. 1 , when the commercial power is in the falling stage, the voltage value of the charging signal output by the filtering module also decreases synchronously. The sampling module 104 detects the voltage value of the point HVDC ( FIG. 1 ) in real time, and transmits it to the control module 110 synchronously. The control module 110 controls the release driving module 114 to adjust the on-off state of the first switching device 108 by comparing the voltage value with the preset first voltage threshold.

Specifically, step 1: when the power is turned on, the electric energy passes through the third filter module 116 to obtain relatively clean electric energy, and after rectification by the rectification module 102, a DC charging signal is obtained and reaches the point HVDC.

The power of the HVDC point includes two parts, wherein the first part of the power is supplied to the control module 110 and the first drive module 114 is supplied with power at the same time.

The second part of the power is supplied to the second filter module 112 . Since the second filter module 112 has an energy storage filter function, during the switching process of the first switching device 108 , the voltage change in the circuit will be clamped by the second filter module 112 , so the variation range is small, which can ensure the stability of the control module 110 .

Step 2: When the voltage of the HVDC point is lower than the preset first voltage threshold V32, the size of the first voltage threshold V32 can be set according to the first filter module 106 and the requirements for harmonics, and its setting range can be 65V to 200V, if set to 120V. If the voltage of the HVDC point is lower than the preset first voltage threshold V32, the first switching device 108 is closed.

After that, after the first part of the electrical energy flows to the control module 110 , part of the electrical energy flows through the sampling module 104 , and another part of the electrical energy flows to the driving module 1143 to supply power to the first driving module 114 .

The sampling module 104 samples the voltage value V31 of the partial electric energy flowing therethrough, and transmits the V31 signal to the control module 110, and the control module 110 determines the voltage value of the charging signal according to V31.

Further, the control module 110 compares the voltage value of the charging signal with the preset first voltage threshold V32, and if the sampling value V31 is less than the preset value V32, the control module 114 outputs an on signal to close the switch module. On the contrary, if the sampled value V31 is greater than the preset value V32, the driving module 114 is controlled to output a shutdown signal to turn off the switch module.

By adjusting and comparing the preset value V32 and the sampling value V31 to control the on and off of the first filter module 106 to change the harmonics, the power supply time of the input current can be significantly prolonged, and the current harmonics can be significantly improved.

FIG. 2 shows a comparison diagram of the voltage curve and the supply current curve according to the embodiment of the present application. As shown in FIG. 2 , after the embodiment of the present application is applied, the changes of the voltage curve and the current curve are improved from part A to part B.

In some embodiments of the present application, FIG. 3 shows the second schematic structural diagram of the charging device 100 according to the embodiment of the present application. As shown in FIG. 3 , the charging device 100 further includes:

the fourth filter module 118, the first end of the fourth filter module 118 is connected to the output end of the rectifier module 102;

The fifth filter module 120 is connected in series with the fourth filter module 118, the first end of the fifth filter module 120 is connected with the second end of the fourth filter module 118, and the second end of the fifth filter module 120 is grounded;

In some embodiments of the present application, as shown in FIG. 3 , the charging device 100 further includes:

the second switching device 122, the first end of the second switching device 122 is connected to the output end of the rectification module 102, and the second end of the second switching device 122 is connected to the first end of the fifth filtering module 120;

The third switching device 124, the first end of the third switching device 124 is connected to the second end of the fourth filtering module 118, and the second end of the third switching device 124 is grounded.

In this embodiment of the present application, the charging device 100 further includes a fourth filtering module 118 and a fifth filtering module 120 , and the harmonics are further suppressed by the fourth filtering module 118 and the fifth filtering module 120 . Specifically, when the voltage value is relatively large, such as the rising stage of the voltage signal, the fourth filtering module 118 and the fifth filtering module 120 are charged in series. And when the voltage value is low, such as the falling stage of the voltage signal, the fourth filter module 118 and the fifth filter module 120 can discharge simultaneously.

The charging device 100 further includes a second switching device 122 and a third switching device 124, the second switching device 122 is respectively connected to the output end of the rectifier module 102 and the second end of the fourth switching device 126, and the third switching device 124 is respectively connected to the fourth switching device 126. The first terminal of the switching device 126 and ground.

Wherein, when the second switch device 122 and the third switch are disconnected, the fourth filter module 118 and the fifth filter module 120 are connected in series, and at this time, the fourth filter module 118 and the fifth filter can be charged in series. When the second switching device 122 and the third switching device 124 are closed, the fourth filtering module 118 and the fifth filtering module 120 are connected in parallel, and at this time, the fourth filtering module 118 and the fifth filtering can be discharged in parallel.

Since the fourth filter module 118 and the fifth filter module 120 are provided, the charging device 100 provided by the present application can increase the current synchronously when the voltage is high, thereby making the power factor (PF) of the charging device 100 higher. high, and can achieve better suppression of harmonics in the circuit.

The fourth switching device 126 is connected in series with the fourth filtering module 118 and the fifth filtering module 120 , and the fourth switching device 126 is located between the second end of the second switching device 122 and the first end of the third switching device 124 .

In the embodiment of the present application, the charging device 100 further includes a fourth switching device 126, and the fourth switching device 126 is connected in series with the fourth filtering module 118 and the fifth filtering module 120. When the fourth switching device 126 is closed, the second switching device 126 is closed. When 122 and the third switch are disconnected, the fourth filter module 118 and the fifth filter module 120 are connected in series, and at this time, the fourth filter module 118 and the fifth filter can be charged in series. When the fourth switching device 126 is turned off and the second switching device 122 and the third switching device 124 are turned on, the fourth filtering module 118 and the fifth filtering module 120 are connected in parallel, and at this time the fourth filtering module 118 and the fifth filtering can be performed discharge in parallel.

In some embodiments of the present application, the control module 110 is further configured to:

When the voltage value is raised to be greater than or equal to the second voltage threshold, the fourth switching device 126 is controlled to be closed, and the second switching device 122 and the third switching device 124 are controlled to be opened;

Controlling the second switching device 122 , the third switching device 124 and the fourth switching device 126 to be turned off when the voltage value is reduced to less than or equal to the preset third voltage threshold;

When the voltage value is reduced to less than or equal to the fourth voltage threshold, controlling the fourth switching device 126 to be turned off, and controlling the second switching device 122 and the third switching device 124 to be turned on;

The second voltage threshold is determined according to the sum of the voltages of the fourth filtering module 118 and the fifth filtering module 120, the third voltage threshold is greater than the first voltage threshold, and the third voltage threshold is less than the second voltage threshold, and the fourth voltage threshold is Half of the third voltage threshold, and the fourth voltage threshold is less than the first voltage threshold.

In the embodiment of the present application, the control module 110 detects the voltage value of the charging signal obtained by the sampling module 104 in real time, and if the voltage value is greater than or equal to the second voltage threshold, generates a corresponding control command to control the fourth switching device 126 to close, and simultaneously The second switching device 122 and the third switching device 124 are controlled to be turned off. At this time, the fourth filter module 118 and the fifth filter module 120 are charged in series. The second voltage threshold VC1 is determined according to the sum of the voltages of the fourth filter module 118 and the fifth filter module 120, that is, the voltage of the charging signal output by the rectifier module 102 is greater than the fourth filter module 118 and the fifth filter module 118 connected in series. The total voltage of the module 120.

It can be understood that if the voltage of the charging signal output by the rectifier module 102 is lower than the total voltage of the fourth filter module 118 and the fifth filter module 120 connected in series, the fourth filter module 118 and the fifth filter module 120 cannot be charged.

Further, if the voltage value drops below the third voltage threshold during the falling stage of the input signal, the second switching device 122 , the third switching device 124 and the fourth switching device 126 are controlled to be turned off, and the fourth filtering module is at this time. 118 and the fifth filter module 120 are cut off from the circuit of the charging device 100 and neither charge nor discharge, so the fourth filter module 118 and the fifth filter module 120 have no effect on the charging device 100 in this stage. The third voltage threshold VC2 is a preset value, and in some embodiments, optionally, VC2>VC1, and VC2<2VC1.

Further, if the input signal continues to drop and the voltage value drops to the fourth voltage threshold, the second switching device 122 and the third switching device 124 are controlled to be closed, and the fourth switching device 126 is controlled to remain open. The filter module 118 and the fifth filter module 120 are discharged in parallel. The fourth voltage threshold is equal to half of the third voltage threshold VC2, that is, 1/2VC2. It can be understood that the third voltage threshold is greater than the first voltage threshold, and the fourth voltage threshold is less than the first voltage threshold. Therefore, in this stage, the first filtering module 106, the fourth filtering module 118 and the fifth filtering module 120 are simultaneously discharge.

Specifically, in the embodiment shown in FIG. 3 , on the basis of the embodiment shown in FIG. 1 , the embodiment of the present application adds a fourth filter module 118 and a fifth filter module 120 , and the fourth filter module 118 and the fifth filter module 120 The filter modules 120 are charged in series and discharged in parallel.

Specifically, the control steps are as follows:

Step 1: When the power is turned on, the electric energy passes through the third filter module 116 to obtain relatively clean electric energy, and after being rectified by the rectification module 102, a DC charging signal is obtained and reaches the point HVDC.

Step 2, at time t1, the voltage value input by the grid is small, so the voltage Vin output by the rectifier module 102 is also small. At this time, the control module 110 controls the first switching device 108 to conduct, so that the first filter module 106 stores energy.

At time t2, the voltage input by the grid increases, and after Vin reaches the preset first voltage threshold Vm, the control module 110 controls the first switching device 108 to turn off, so that the first filtering module 106 does not work. Wherein, the size of Vm in this embodiment can be set in the range of 100V to 200V according to the specific design of the charging device.

In the t2-t3 stage, the charging device directly supplies power to the electrical device through the input alternating current (mains).

At time t3, when the value of Vin reaches VC1, the fourth filter module 118 and the fifth filter module 120 are charged in series, wherein VC1 is determined by the sum of the voltage value of the fourth filter module 118 and the voltage value of the fifth filter module 120.

At time t4, the value of Vin gradually decreases from the maximum value to VC2, and the fourth filtering module 118 and the fifth filtering module 120 stop charging.

In the t4-t5 stage, the charging equipment directly supplies power to the electrical equipment through the input alternating current (mains).

At time t5, Vin begins to be smaller than Vm, and at this time, the first switching device 108 is closed, and the first filtering module 106 begins to discharge.

In stages t5-t6, the charging device supplies power to the electrical device through the first filtering module 106.

At time t6, Vin decreases to less than half of VC2, at which time the fourth filter module 118 and the fifth filter module 120 start to discharge. At this time, the charging device simultaneously supplies power to the electrical device through the first filtering module 106 , the fourth filtering module 118 and the fifth filtering module 120 .

The embodiment of the present application adds a fourth filter module 118 and a fifth filter module 120 on the basis of the embodiment shown in FIG. 1 , so when the voltage is larger, the current is increased, the PF value is higher, and the harmonics are smaller.

In some embodiments of the present application, FIG. 4 shows the third schematic structural diagram of a charging device 100 according to an embodiment of the present application. As shown in FIG. 4 , the charging device 100 further includes:

The sixth filtering module 128 is connected in series with the first filtering module 106;

The first one-way conduction element 130 is connected in series between the first filter module 106 and the sixth filter module 128, and the first one-way conduction element 130 conducts in the direction from the first filter module 106 to the sixth filter module 128;

The second one-way conduction element 132, the first end of the second one-way conduction element 132 is connected to the common terminal of the first filter module 106 and the first one-way conduction element 130, the second end of the second one-way conduction element is grounded, The second one-way module conducts in the direction from the ground terminal to the first filter module 106;

The third one-way conducting element 134, the first end of the third one-way conducting element 134 is connected to the common end of the first one-way conducting element 130 and the sixth filter module 128, and the second end of the third one-way conducting element 134 is connected to the The output terminals of the rectifier module 102 are connected to each other, and the third one-way conducting element conducts in the direction from the sixth filter module 128 to the output terminal of the rectifier module 102 .

In the embodiment of the present application, the charging device 100 further includes a sixth filter module 128 , a first one-way conduction element 130 , a second one-way conduction element 132 and a third one-way conduction element 134 . The sixth filter module 128 is connected in series with the first filter module 106, the first one-way conduction element 130 is connected in series between the first filter module 106 and the sixth filter module 128, and the input end of the second one-way conduction element 132 is grounded , the output end of the second one-way conducting element 132 is connected with the input end of the first one-way conducting element 130, the input end of the third one-way conducting element 134 is connected with the output end of the first one-way conducting element 130, The output end of the three-way conducting element 134 is connected to the output end of the rectifier module 102 .

Wherein, the first one-way conduction element 130 , the second one-way conduction element 132 and the third one-way conduction element 134 can all be configured as diodes.

Wherein, when the first switching device 108 is closed, the sixth filtering module 128 is short-circuited. When the first switching device 108 is turned off, the first filter module 106 and the sixth filter module 128 are connected in series in the direction from the output terminal of the rectifier module 102 to the ground terminal. When the voltages of the module 106 and the sixth filter module 128 are summed, the first filter module 106 and the sixth filter module 128 are charged in series.

After entering the voltage drop interval, as the voltage decreases, the first filter module 106 and the sixth filter module 128 stop charging, and when the voltage value is less than the first voltage threshold, the first switching device 108 is closed, and the first filter module 108 is closed. The filter module 106 begins to discharge. When the voltage continues to decrease to be lower than the voltage of the sixth filter module 128, the sixth filter module 128 also starts to discharge.

In the embodiment of the present application, the current can be increased synchronously when the voltage is relatively high, thereby making the power factor (PF) of the charging device 100 higher, and can achieve a better suppression effect on harmonics in the circuit. Fewer filter modules are provided, thereby saving costs and further reducing the size of the charging device.

In the embodiment shown in FIG. 4 , the embodiment of the present application adds a sixth filtering module 128 on the basis of the embodiment shown in FIG. 1 .

Specifically, the control steps are as follows:

The electrical energy of the HVDC point includes two parts, wherein the first part of the electrical energy is supplied to the control module 110, and the first driving module 114 is supplied with power at the same time.

Step 2, at time t1, when the value of the voltage Vin is small, the control module 110 controls the first switching device 108 to be turned on, so that the first filtering module 106012 stores energy.

At time t2, the value of the voltage vin input by the grid reaches the preset value Vm, and the control module 110 controls the first switching device 108 to be turned off, so that the first filtering module 106 does not work.

At time t3, the value of the voltage Vin reaches VC1, and the first filter module 106 and the sixth filter module 128 are charged in series.

At time t4, the value of Vin reaches the maximum value and begins to gradually decrease, and the first filtering module 106 and the sixth filtering module 128 stop charging.

At time t5, Vin is less than Vm, the first switching device 108 is turned on, and the first filtering module 106 starts to discharge.

At time t6, Vin is less than half of VC2, and the first filter module 106 and the sixth filter module 128 discharge simultaneously. At this time, the charging device supplies power to the electrical device through the first filtering module 106 and the sixth filtering module 128 .

In some embodiments of the present application, the first one-way conduction element 130 , the second one-way conduction element 132 and the third one-way conduction element 134 are diodes.

In the embodiment of the present application, the first one-way conduction element 130 , the second one-way conduction element 132 and the third one-way conduction element 134 are all set as diodes. Due to the small size and low cost of the diodes, it is beneficial to realize the charging device. Miniaturization and Affordability.

In some embodiments of the present application, the charging device 100 further includes:

The electromagnetic interference filtering module 116 is disposed at the input end of the rectification module 102 and is used for filtering the electrical signal.

In the embodiment of the present application, the charging device 100 further includes an electromagnetic interference filter module 116. By setting the electromagnetic interference (Electromagnetic Interference, EMI) filter module 116, the clutter in the power grid can be further filtered, electromagnetic interference can be reduced, and signal sampling efficiency can be improved. Accuracy.

In some embodiments of the present application, a charging control method is provided for controlling the charging device provided in any of the above embodiments. FIG. 5 shows a flowchart of the charging control method according to an embodiment of the present application, As shown in Figure 5, the method includes:

Step 502, collecting the charging signal output by the rectifier module to determine the voltage value of the charging signal;

Step 504, according to the voltage value and the preset voltage threshold value, control the first switching device to be turned on or off.

In the embodiment of the present application, the voltage of the charging signal output by the filtering module is sampled in real time by the sampling module, and the opening and closing of the first switching device is adjusted according to the voltage, that is, whether the first filtering module is charged or discharged is controlled. Specifically, when the detected voltage is lower than the voltage threshold, the first switching device is controlled to be closed, and at this time the first filter module is charged or discharged according to the actual voltage, wherein, when the input waveform is in the rising phase, that is, the voltage rising phase , the first filter module is in a charging state, and when the input waveform is in a falling phase, that is, when the voltage is reduced, the first filter module is in a discharging phase.

When the voltage value is higher than the voltage threshold, the first switching device is controlled to be turned off, and the first filter module does not work at this time, which is equivalent to reducing the total working time of the first filter module, so that the working time of the first filter module is reduced. It can be limited within the set range, that is, the time for the input current to charge the first filter module is reduced. Therefore, under the input voltage cycle, the time for the input current to directly supply power to the electrical equipment can be prolonged, which can effectively reduce the output caused by the output. The harmonics caused by the different phases of the current and the input voltage meet the needs of high-power charging equipment for harmonic suppression.

By applying the embodiments provided in the present application, by setting the first switching device in series with the first filtering module, the first switching device is controlled to be closed or disconnected according to the voltage value of the rectified charging signal, thereby reducing the effect of the first filtering module. time, so that the charging device of the embodiment of the present application can meet the harmonic suppression requirements of the high-power charging device without setting the power factor control module, so the volume and cost of the charging device can be effectively reduced, which is conducive to charging The miniaturization, light weight and price of the device will improve the competitiveness of "fast charging" charging products.

In some embodiments of the present application, controlling the first switching device to be turned on or off according to the voltage value and the preset voltage threshold value includes:

When the voltage value is greater than the preset first voltage threshold, controlling the first switching device to be turned off;

When the voltage value is less than or equal to the first voltage threshold, the first switching device is controlled to be closed.

In some embodiments of the present application, if the voltage value of the charging signal collected by the sampling module is greater than the preset first voltage threshold, the control module generates a corresponding disconnection control signal, controls the drive module to generate a disconnection drive signal, and drives the When the first switching device is turned off, the first filter module is cut off from the circuit, neither charging nor discharging.

Correspondingly, if the voltage value of the charging signal collected by the acquisition module is less than or equal to the first voltage threshold, the control module generates a corresponding closing control signal, and the control driving module generates a closing drive signal to drive the first switching device to close, at this time the first switching device is closed. A filter module is connected to the circuit. In the voltage drop stage, if the voltage value is lower than the voltage value of the first filter module, the first filter module discharges compensation. In the voltage rise stage, if the voltage value is higher than the voltage value of the first filter module , the first filter module is charged. The embodiments of the present application can change the harmonics, significantly prolong the power supply time of the input current, and significantly improve the current harmonics.

In some embodiments of the present application, when the charging device includes a fourth filtering module, a fifth filtering module, a second switching device, a third switching device, and a fourth switching device, the method further includes:

When the voltage value is raised to be greater than or equal to the second voltage threshold, controlling the fourth switching device to be closed, and controlling the second switching device and the third switching device to be disconnected;

Controlling the second switching device, the third switching device and the fourth switching device to be turned off when the voltage value is reduced to less than or equal to a preset third voltage threshold;

When the voltage value is reduced to less than or equal to the fourth voltage threshold, controlling the fourth switching device to be turned off, and controlling the second switching device and the third switching device to be turned on;

The second voltage threshold is determined according to the sum of the rated voltages of the fourth filter module and the fifth filter module, the third voltage threshold is smaller than the second voltage threshold, and the fourth voltage threshold is half of the third voltage threshold.

In this embodiment of the present application, the control module detects the voltage value of the charging signal acquired by the sampling module in real time, and if the voltage value is greater than or equal to the second voltage threshold, generates a corresponding control command, controls the fourth switching device to close, and simultaneously controls the second voltage threshold. The switching device and the third switching device are turned off. At this time, the fourth filter module and the fifth filter module are charged in series. The second voltage threshold VC1 is determined according to the sum of the voltages of the fourth filter module and the fifth filter module, that is, the voltage of the charging signal output by the rectifier module is greater than the total voltage of the fourth filter module and the fifth filter module connected in series .

It can be understood that if the voltage of the charging signal output by the rectifier module is lower than the total voltage of the fourth filter module and the fifth filter module connected in series, the fourth filter module and the fifth filter module cannot be charged.

Further, if the voltage value drops below the third voltage threshold during the falling stage of the input signal, the second switching device, the third switching device and the fourth switching device are controlled to be turned off, and the fourth filtering module and the fifth The filter module is cut off from the circuit of the charging device, neither charging nor discharging, so in this stage, the fourth filter module and the fifth filter module have no influence on the charging device. The third voltage threshold VC2 is a preset value, and in some embodiments, optionally, VC2>VC1, and VC2<2VC1.

Further, if the input signal continues to drop and the voltage value drops to the fourth voltage threshold, the second switching device and the third switching device are controlled to be closed, and the fourth switching device is controlled to remain open, and at this time, the fourth filter The module and the fifth filter module are discharged in parallel. The fourth voltage threshold is equal to half of the third voltage threshold VC2, that is, 1/2VC2. It can be understood that the third voltage threshold is greater than the first voltage threshold, and the fourth voltage threshold is less than the first voltage threshold. Therefore, in this stage, the first filter module, the fourth filter module and the fifth filter module discharge simultaneously.

In the embodiment of the present application, a fourth filter module and a fifth filter module are added on the basis of the embodiment shown in FIG. 1 , so when the voltage is larger, the current is increased, the PF value is higher, and the harmonics are smaller.

In some embodiments of the present application, a charging control device is provided for controlling the charging device in any of the above embodiments. FIG. 6 shows a structural block diagram of the charging control device according to an embodiment of the present application, such as As shown in FIG. 6 , the charging control device 600 includes:

The collection unit 602 is used to collect the charging signal output by the rectifier module to determine the voltage value of the charging signal;

The control unit 604 is configured to control the first switching device to be turned on or off according to the voltage value and the preset voltage threshold.

In some embodiments of the present application, the control unit 604 is specifically configured to:

In some embodiments of the present application, when the charging device includes a fourth filtering module, a fifth filtering module, a second switching device, a third switching device, and a fourth switching device, the control unit 604 is further configured to:

In some embodiments of the present application, a readable storage medium is provided on which a program or instruction is stored, and when the program or instruction is executed by a processor, implements the steps of the charging control method provided in any of the foregoing embodiments Therefore, the readable storage medium also includes all the beneficial effects of the charging control method provided in any of the above-mentioned embodiments, which will not be repeated here in order to avoid repetition.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims

A charging device, comprising:

The rectifier module is used to rectify the connected electrical signal to obtain a rectified charging signal;

a sampling module, connected to the output end of the rectification module, for collecting the voltage value of the charging signal;

a first filter module, the first end of the first filter module is connected to the output end of the rectifier module;

a first switch device, connected to the first filter module, and the first filter module is grounded in series through the first switch device;

The control module is connected with the sampling module and the first switching device, and the control module is used for controlling the operation of the first switching device according to the voltage value.
The charging device of claim 1, further comprising:

The second filter module, the first end of the second filter module is connected to the first end of the first filter module, and the second end of the second filter module is grounded.
The charging device of claim 1, further comprising:

A driving module is connected to the control module and the first switching device, and the driving module is configured to drive the first switching device to open or close according to a control signal of the control module.
The charging device according to claim 1, wherein the control module is further configured to:

When the voltage value is greater than a preset first voltage threshold, the first switching device is controlled to be turned off, and when the voltage value is less than or equal to the first voltage threshold, the first switching device is controlled The switching device is closed.
The charging device of claim 4, further comprising:

a fourth filter module, the first end of the fourth filter module is connected to the output end of the rectifier module;

A fifth filter module is connected in series with the fourth filter module, the first end of the fifth filter module is connected to the second end of the fourth filter module, and the second end of the fifth filter module is grounded ;

a second switch device, the first end of the second switch device is connected to the output end of the rectifier module, and the second end of the second switch device is connected to the first end of the fifth filter module;

A third switching device, the first end of the third switching device is connected to the second end of the fourth filter module, and the second end of the third switching device is grounded.
The charging device of claim 5, further comprising:

a fourth switching device connected in series with the fourth filtering module and the fifth filtering module, the fourth switching device is located at the second end of the second switching device and the first end of the third switching device between.
The charging device according to claim 6, wherein the control module is further used for:

When the voltage value is raised to be greater than or equal to a second voltage threshold, controlling the fourth switching device to be closed, and controlling the second switching device and the third switching device to be disconnected;

Controlling the second switching device, the third switching device and the fourth switching device to be turned off when the voltage value is reduced to less than or equal to a preset third voltage threshold;

When the voltage value is reduced to less than or equal to a fourth voltage threshold, controlling the fourth switching device to be turned off, and controlling the second switching device and the third switching device to be turned on;

Wherein, the second voltage threshold is determined according to the voltages of the fourth filtering module and the fifth filtering module, the third voltage threshold is greater than the first voltage threshold, and the third voltage threshold is less than the A second voltage threshold, the fourth voltage threshold is half of the third voltage threshold, and the fourth voltage threshold is smaller than the first voltage threshold.
The charging device according to any one of claims 1 to 4, further comprising:

a sixth filter module, connected in series with the first filter module;

A first one-way conduction element is connected in series between the first filter module and the sixth filter module, and the first one-way conduction element is in the direction from the first filter module to the sixth filter module turn on;

The second one-way conduction element, the first end of the second one-way conduction element is connected to the common end of the first filter module and the first one-way conduction element, the first end of the second one-way conduction element is Both ends are grounded, and the second one-way module conducts in the direction from the ground end to the first filter module;

The third one-way conduction element, the first end of the third one-way conduction element is connected to the common end of the first one-way conduction element and the sixth filter module, the third one-way conduction element The two ends are connected to the output end of the rectifier module, and the third one-way conducting element conducts in the direction from the sixth filter module to the output end of the rectifier module.
The charging device according to claim 8, wherein the first one-way conduction element, the second one-way conduction element and the third one-way conduction element are diodes.
The charging device according to any one of claims 1 to 4, further comprising:

The electromagnetic interference filter module is arranged at the input end of the rectifier module, and is used for filtering the electrical signal.
A charging control method for controlling the charging device according to any one of claims 1 to 10, comprising:

collecting the charging signal output by the collecting module of the charging device to determine the voltage value of the charging signal;

According to the voltage value and the preset voltage threshold value, the first switching device of the charging device is controlled to be turned on or off.
The method according to claim 11, wherein, according to the voltage value and a preset voltage threshold, controlling the first switching device of the charging device to be turned on or off comprises:

When the voltage value is greater than the preset first voltage threshold, controlling the first switching device to be turned off;

When the voltage value is less than or equal to the first voltage threshold, the first switching device is controlled to be closed.
The method according to claim 11, wherein when the charging device comprises a fourth filter module, a fifth filter module, a second switching device, a third switching device and a fourth switching device, the method Also includes:

When the voltage value is raised to be greater than or equal to a second voltage threshold, controlling the fourth switching device to be closed, and controlling the second switching device and the third switching device to be disconnected; or

Controlling the second switching device, the third switching device and the fourth switching device to be turned off when the voltage value is reduced to less than or equal to a preset third voltage threshold; or

When the voltage value is reduced to less than or equal to a fourth voltage threshold, controlling the fourth switching device to be turned off, and controlling the second switching device and the third switching device to be turned on;

Wherein, the second voltage threshold is determined according to the sum of the rated voltages of the fourth filter module and the fifth filter module, the third voltage threshold is smaller than the second voltage threshold, and the fourth voltage threshold is half of the third voltage threshold.
A charging control device for controlling the charging device according to any one of claims 1 to 10, comprising:

a collection unit, configured to collect the charging signal output by the collection module of the charging device to determine the voltage value of the charging signal;

The control unit is configured to control the first switching device of the charging device to be turned on or off according to the voltage value and a preset voltage threshold.
The device according to claim 14, wherein the control unit is specifically configured to:

When the voltage value is greater than the preset first voltage threshold, controlling the first switching device to be turned off;

When the voltage value is less than or equal to the first voltage threshold, the first switching device is controlled to be closed.
The device according to claim 14, wherein, in the case that the charging device includes a fourth filter module, a fifth filter module, a second switching device, a third switching device and a fourth switching device, the control Units are also used to:

When the voltage value is raised to be greater than or equal to a second voltage threshold, controlling the fourth switching device to be closed, and controlling the second switching device and the third switching device to be disconnected; or

Controlling the second switching device, the third switching device and the fourth switching device to be turned off when the voltage value is reduced to less than or equal to a preset third voltage threshold; or

When the voltage value is reduced to less than or equal to a fourth voltage threshold, controlling the fourth switching device to be turned off, and controlling the second switching device and the third switching device to be turned on;

Wherein, the second voltage threshold is determined according to the sum of the rated voltages of the fourth filter module and the fifth filter module, the third voltage threshold is smaller than the second voltage threshold, and the fourth voltage threshold is half of the third voltage threshold.
A readable storage medium on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the charging control method according to any one of claims 11 to 13 are implemented.