Dual-path switching charging device

Abstract

This application belongs to the field of charging technology, and particularly relates to a dual-branch switching charging device, comprising: an input terminal of a conversion circuit connected to AC power; an output terminal of an output circuit connected to a terminal device; a first energy storage circuit comprising: a first switch, a second switch, and a first energy storage component, wherein the input terminal of the first energy storage component is connected to the first output terminal of the conversion circuit through the first switch, and the output terminal of the first energy storage component is connected to the first input terminal of the output circuit through the second switch; a second energy storage circuit comprising: a third switch, a fourth switch, and a second energy storage component, wherein the input terminal of the second energy storage component is connected to the second output terminal of the conversion circuit through the third switch, and the output terminal of the second energy storage component is connected to the second input terminal of the output circuit through the fourth switch; and a control circuit; this dual-branch switching charging device, by setting the first energy storage circuit and the second energy storage circuit, can flexibly switch the charging branch according to the actual situation during charging and discharging.

Description

Technical Field

[0001] This application relates to the field of charging technology, and in particular to a dual-branch switching charging device. Background Technology

[0002] Many consumers are accustomed to using their phones while charging, a practice that poses a safety hazard of electrical leakage. This risk increases significantly, especially when critical components in the circuit, such as Y capacitors and transformers, experience insulation failure, seriously threatening consumers' lives. Y capacitors, as crucial safety components in circuits, are primarily used for filtering and bypassing, making their insulation performance paramount. Transformers, responsible for voltage conversion, also require adequate insulation.

[0003] Currently, the industry commonly uses a series connection of two Y capacitors to address the insulation failure problem of Y capacitors. This design can reduce the risk of simultaneous failure of both Y capacitors to some extent, thereby improving circuit safety. However, this solution cannot completely eliminate the risk, as Y capacitor failure can be caused by various factors, such as manufacturing defects and environmental factors. These factors may cause one Y capacitor to fail, thus affecting the safety of the entire circuit. More seriously, transformers operating in high-temperature environments for extended periods are prone to aging, leading to a decline in the performance of the insulation materials and ultimately causing insulation failure.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this application provides a dual-branch switching charging device.

[0006] This application provides a dual-branch switching charging device, comprising:

[0007] A conversion circuit, whose input terminal is connected to AC power, is used to convert AC power into DC power.

[0008] The output circuit is connected to the terminal device and is used to power the terminal device.

[0009] The first energy storage circuit includes: a first switch, a second switch, and a first energy storage component. The input terminal of the first energy storage component is connected to the first output terminal of the conversion circuit through the first switch, and the output terminal of the first energy storage component is connected to the first input terminal of the output circuit through the second switch.

[0010] The second energy storage circuit includes a third switch, a fourth switch, and a second energy storage component. The input terminal of the second energy storage component is connected to the second output terminal of the conversion circuit through the third switch, and the output terminal of the second energy storage component is connected to the second input terminal of the output circuit through the fourth switch.

[0011] The control circuit is connected to the detection signal terminal of the conversion circuit, the detection signal terminal of the first energy storage component, the detection signal terminal of the second energy storage component, the detection signal terminal of the output circuit, the control terminal of the first switch, the control terminal of the second switch, the control terminal of the third switch, and the control terminal of the fourth switch.

[0012] In some possible implementations, the control circuit is configured such that when AC power is detected and no terminal device is inserted, a first switch closes, a second switch opens, and the first energy storage component is in a charging state; and a third switch closes, a fourth switch opens, and the second energy storage component is in a charging state.

[0013] In some possible implementations, the control circuit is configured such that when AC power is detected and no terminal device is inserted, the first switch closes, the second switch opens, and the first energy storage component is in a charging state; or the third switch closes, the fourth switch opens, and the second energy storage component is in a charging state.

[0014] In some possible implementations, the control circuit is configured such that when AC power is detected and a terminal device is inserted, the first switch closes, the second switch opens, and the first energy storage component is in a charging state; and the third switch opens, the fourth switch closes, and the second energy storage component is in a discharging state.

[0015] Alternatively, when AC power is detected and a terminal device is inserted, the first switch opens, the second switch closes, and the first energy storage component is in a discharging state; and the third switch closes, the fourth switch opens, and the second energy storage component is in a charging state.

[0016] In some possible implementations, the control circuit is configured such that when no AC power is detected and a terminal device is inserted, the first switch is opened, the second switch is closed, and the first energy storage component is in a discharging state; or the third switch is opened, the fourth switch is closed, and the second energy storage component is in a discharging state.

[0017] In some possible implementations, the first energy storage component is a lithium battery pack.

[0018] In some possible implementations, the second energy storage component is a lithium battery pack.

[0019] In some possible implementations, the first switch, the second switch, the third switch, and the fourth switch are all field-effect transistors.

[0020] One of the above technical solutions has at least one of the following advantages or beneficial effects: This dual-branch switching charging device, by setting a first energy storage circuit and a second energy storage circuit, can flexibly switch the charging branch according to the actual situation during charging and discharging, avoiding the interruption of the entire charging process due to a problem in a single branch, thereby improving the charging efficiency and continuity, and ensuring that the terminal equipment can stably obtain power.

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the dual-branch switching charging device provided in an embodiment of this application; Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] like Figure 1 As shown, this embodiment provides a dual-branch switching charging device, including: a conversion circuit 100, an output circuit 200, a first energy storage circuit 300, a second energy storage circuit 400, and a control circuit 500.

[0026] The input terminal 110 of the conversion circuit 100 is connected to AC power, and the conversion circuit 100 is used to convert AC power to DC power; the output terminal 210 of the output circuit 200 is connected to the terminal device, and the output circuit 200 is used to power the terminal device; the first energy storage circuit 300 includes: a first switch 310, a second switch 320, and a first energy storage component 330, the input terminal 331 of the first energy storage component 330 is connected to the first output terminal 120 of the conversion circuit 100 through the first switch 310, and the output terminal 332 of the first energy storage component 330 is connected to the first input terminal 220 of the output circuit 200 through the second switch 320; the second energy storage circuit 400 includes: a third switch 410, a fourth switch 420, and a second energy storage group. The input terminal 431 of the second energy storage component 430 is connected to the second output terminal 130 of the conversion circuit 100 through the third switch 410, and the output terminal 432 of the second energy storage component 430 is connected to the second input terminal 230 of the output circuit 200 through the fourth switch 420. The control circuit 500 is connected to the detection signal terminal 140 of the conversion circuit 100, the detection signal terminal 333 of the first energy storage component 330, the detection signal terminal 433 of the second energy storage component 430, the detection signal terminal 240 of the output circuit 200, the control terminal 311 of the first switch 310, the control terminal 321 of the second switch 320, the control terminal 411 of the third switch 410, and the control terminal 421 of the fourth switch 420.

[0027] The dual-branch switching charging device provided in this embodiment, by setting up a first energy storage circuit 300 and a second energy storage circuit 400, can flexibly switch charging branches according to actual conditions during charging and discharging, avoiding the interruption of the entire charging process due to a problem in a single branch, thereby improving charging efficiency and continuity and ensuring that the terminal device can stably obtain power. Furthermore, this dual-branch switching charging device has two energy storage components, which can store energy separately and are connected to the output circuit 200 through their respective switches. Under normal circumstances, the two energy storage components can simultaneously supply power to the terminal device, meeting the power needs of the terminal device in different operating states. Moreover, when there is a brief fluctuation or interruption in the AC power input, the energy storage components can continue to provide power to the output circuit 200, maintaining the normal operation of the terminal device, effectively enhancing the stability of the entire power supply system and reducing the risk of damage to the terminal device caused by power instability. The dual-branch design and the comprehensive monitoring and control functions of the control circuit 500 give this charging device a better ability to cope with various complex situations.

[0028] In some embodiments, the control circuit 500 is configured to: when AC power is detected to be connected and no terminal device is inserted, the first switch 310 is closed, the second switch 320 is open, and the first energy storage component 330 is in a charging state; and the third switch 410 is closed, the fourth switch 420 is open, and the second energy storage component 430 is in a charging state.

[0029] When the control circuit 500 receives a signal from the detection signal terminal 140 of the conversion circuit 100, it indicates that the device is connected to AC power. Simultaneously, if the control circuit 500 does not receive a signal from the detection signal terminal 240 of the output circuit 200, it indicates that no terminal device is inserted. At this time, the control circuit 500 can control the first switch 310 to close, the third switch 410 to close, the second switch 320 to open, and the fourth switch 420 to open, based on the power signals emitted from the detection signal terminal 333 of the first energy storage component 330 and the second energy storage component 430, thereby charging the first energy storage component 330 and the second energy storage component 430.

[0030] In some embodiments, the control circuit 500 is configured to: when AC power is detected and no terminal device is inserted, the first switch 310 is closed, the second switch 320 is open, and the first energy storage component 330 is in a charging state; or the third switch 410 is closed, the fourth switch 420 is open, and the second energy storage component 430 is in a charging state.

[0031] When the control circuit 500 receives a signal from the detection signal terminal 140 of the conversion circuit 100, it indicates that the device is connected to AC power. Simultaneously, if the control circuit 500 does not receive a signal from the detection signal terminal 240 of the output circuit 200, it indicates that no terminal device is inserted. At this time, the control circuit 500 can charge one of the energy storage components based on the power signal emitted from the detection signal terminal 333 of the first energy storage component 330 and the power signal emitted from the detection signal terminal 433 of the second energy storage component 430.

[0032] In some embodiments, the control circuit 500 is configured to: when a connection to AC power is detected and a terminal device is inserted, the first switch 310 is closed, the second switch 320 is open, and the first energy storage component 330 is in a charging state; and the third switch 410 is open, the fourth switch 420 is closed, and the second energy storage component 430 is in a discharging state.

[0033] Alternatively, when AC power is detected and a terminal device is inserted, the first switch 310 is opened, the second switch 320 is closed, and the first energy storage component 330 is in a discharging state; and the third switch 410 is closed, the fourth switch 420 is opened, and the second energy storage component 430 is in a charging state.

[0034] When the control circuit 500 receives a signal from the detection signal terminal 140 of the conversion circuit 100, it indicates that the device is connected to AC power. Simultaneously, when the control circuit 500 receives a signal from the detection signal terminal 240 of the output circuit 200, it indicates that a terminal device has been inserted. At this time, the control circuit 500 can compare the power levels of the first energy storage component 330 and the second energy storage component 430 based on the power level signals from their respective detection signal terminals, and then select the energy storage component with the larger power level to charge the terminal device. The other energy storage component with the smaller power level can then enter the charging state.

[0035] In some embodiments, the control circuit 500 is configured to: when a terminal device is inserted and no AC power is detected, the first switch 310 is opened, the second switch 320 is closed, and the first energy storage component 330 is in a discharging state; or the third switch 410 is opened, the fourth switch 420 is closed, and the second energy storage component 430 is in a discharging state.

[0036] When the control circuit 500 does not receive a signal from the detection signal terminal 140 of the conversion circuit 100, it indicates that the device is not connected to AC power. Simultaneously, if the control circuit 500 receives a signal from the detection signal terminal 240 of the output circuit 200, it indicates that a terminal device has been inserted. At this time, the control circuit 500 can compare the power levels of the first energy storage component 330 and the second energy storage component 430 based on the power level signals from their respective detection signal terminals, and then select the energy storage component with the higher power level to charge the terminal device.

[0037] In some embodiments, the conversion circuit 100 includes a rectifier circuit, a step-down circuit, and a filter circuit connected in sequence. The input terminal of the rectifier circuit is connected to AC power, and the output terminal of the filter circuit is connected to the first switch 310 and the third switch 410, respectively.

[0038] In some embodiments, the first energy storage component 330 is a lithium battery pack. The second energy storage component 430 is a lithium battery pack.

[0039] In some embodiments, the first switch 310, the second switch 320, the third switch 410, and the fourth switch 420 are all field-effect transistors.

[0040] In some embodiments, the output circuit 200 includes a voltage regulation circuit, the input terminals of which are connected to the second switch 320 and the fourth switch 420 respectively, and the output terminal of which is used to connect to a terminal device.

[0041] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A dual leg switching charging device, comprising: include: A conversion circuit, wherein the input terminal of the conversion circuit is connected to AC power, and the conversion circuit is used to convert AC power into DC power; An output circuit, the output terminal of which is connected to a terminal device, is used to power the terminal device. A first energy storage circuit, comprising: a first switch, a second switch, and a first energy storage component, wherein the input terminal of the first energy storage component is connected to the first output terminal of the conversion circuit via the first switch, and the output terminal of the first energy storage component is connected to the first input terminal of the output circuit via the second switch; The second energy storage circuit includes a third switch, a fourth switch, and a second energy storage component. The input terminal of the second energy storage component is connected to the second output terminal of the conversion circuit through the third switch, and the output terminal of the second energy storage component is connected to the second input terminal of the output circuit through the fourth switch. The control circuit is connected to the detection signal terminal of the conversion circuit, the detection signal terminal of the first energy storage component, the detection signal terminal of the second energy storage component, the detection signal terminal of the output circuit, the control terminal of the first switch, the control terminal of the second switch, the control terminal of the third switch, and the control terminal of the fourth switch.

2. The dual-branch switching charging device according to claim 1, characterized in that, The first energy storage component is a lithium battery pack.

3. The dual leg switched charging device of claim 1, wherein, The second energy storage component is a lithium battery pack.

4. The dual leg switched charging device of claim 1, wherein, The first switch, the second switch, the third switch, and the fourth switch are all field-effect transistors.

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