Multi-channel conference unit charging device

Abstract

The utility model relates to a multichannel conference unit charging device which comprises an input unit and a charging management unit. The input unit comprises a first protection switch, a power conversion module and a second protection switch; the charging management unit comprises a weak current conversion protection module and a charging interface module; the charging interface module comprises a plurality of wired charging interfaces and a plurality of wireless charging interfaces; the power supply conversion module receives the alternating-current mains supply transmitted by the first protection switch and converts the alternating-current mains supply into direct current; the weak current conversion protection module carries out filtering and voltage dividing processing on the direct current, then generates working voltage needed by the charging management unit and provides a charging signal for the charging interface module. And the plurality of wired charging interfaces and / or the plurality of wireless charging interfaces transmit charging signals to one or more accessed conference units. According to the utility model, a plurality of conference units can be charged at the same time on the premise that the battery does not need to be disassembled, and the charging efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging, and more specifically to a charging device for a multi-channel conference unit. Background Art

[0002] Currently, most wireless conference units on the market are powered by lithium batteries, and there are two main ways to charge them. The first is to remove the battery and then charge it; the second is to charge the conference units one by one.

[0003] However, both of the above two charging methods have their shortcomings. For the first method, disassembling the battery for charging is prone to cause safety accidents, and multiple disassembly and installation will reduce the service life of the conference unit. For the second method, the conference units are charged one by one, the charging efficiency is too low and there is no charging management, which makes it difficult to meet the user's efficient conference needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a multi-channel conference unit charging device.

[0005] The technical solution adopted by the utility model to solve the technical problem is: constructing a multi-channel conference unit charging device, including: an input unit and a charging management unit;

[0006] The input unit includes: a first protection switch, a power conversion module and a second protection switch;

[0007] The charging management unit includes: a weak current conversion protection module and a charging interface module; the charging interface module includes: a plurality of wired charging interfaces and a plurality of wireless charging interfaces;

[0008] The input end of the first protection switch is connected to the AC mains, the output end of the first protection switch is connected to the input end of the power conversion module, the output end of the power conversion module is connected to the input end of the second protection switch, the output end of the second protection switch is connected to the input end of the weak current conversion protection module, and the output end of the weak current output module is connected to the charging interface module;

[0009] The power conversion module receives the AC mains power transmitted through the first protection switch, and converts the AC mains power into DC power, so as to transmit the DC power to the weak current conversion protection module through the second protection switch;

[0010] The weak current conversion protection module performs filtering and voltage division processing on the direct current to generate the working voltage required by the charging management unit and provides a charging signal to the charging interface module;

[0011] The multiple wired charging interfaces are used to transmit the charging signal to one or more connected conference units, and the multiple wireless charging interfaces are used to transmit the charging signal to one or more connected conference units.

[0012] In the multi-channel conference unit charging device described in the utility model, the charging management unit further includes: an MCU control module and a voltage and current monitoring module;

[0013] The voltage and current monitoring module is connected to the MCU control module, and is used to perform voltage and current monitoring on the connected conference unit according to the control of the MCU control module and output charging information of the connected conference unit.

[0014] In the multi-channel conference unit charging device described in the utility model, the charging management unit further includes: a display module and an alarm indication module connected to the MCU control module;

[0015] The display module displays the charging information transmitted by the MCU control module;

[0016] The alarm indication module performs an alarm output according to the alarm signal output by the MCU control module.

[0017] In the multi-channel conference unit charging device described in the utility model, the charging management unit further includes: an overcharge and overcurrent protection module;

[0018] The overcharge and overcurrent protection module is connected to the connected conference unit, and performs overcharge and overcurrent monitoring and protection on the connected conference unit.

[0019] In the multi-channel conference unit charging device described in the utility model, the weak current conversion protection module includes: a voltage processing module and a plurality of voltage conversion modules;

[0020] The voltage processing module is connected to the output end of the second protection switch, and the output ends of the voltage processing module are respectively connected to the multiple voltage conversion modules;

[0021] The voltage processing module is used to filter the direct current to obtain the first working voltage and the charging signal;

[0022] Each of the voltage conversion modules performs voltage division processing on the first operating voltage to generate a second operating voltage.

[0023] In the multi-channel conference unit charging device described in the utility model, the voltage processing module includes: a second capacitor, a third capacitor, a first chip, a first voltage regulator, a first inductor, a fourth capacitor, a fifth capacitor, a first resistor, a second light-emitting diode and a first capacitor; each voltage conversion module includes: a step-down chip;

[0024] The first end of the second capacitor, the first end of the third capacitor and the first pin of the first chip are connected to the output end of the second protection switch, the second end of the second capacitor and the second end of the third capacitor are grounded, the second pin of the first chip is respectively connected to the cathode of the first voltage regulator and the first end of the first inductor, the anode of the first voltage regulator is grounded, the second end of the first inductor is connected to the first end of the fourth capacitor, the first end of the fifth capacitor, the first end of the first resistor and the first end of the first capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the second end of the first capacitor are grounded, the second end of the first resistor is connected to the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is grounded;

[0025] The first end of the first capacitor generates the first operating voltage and the charging signal; the input end of the buck chip is connected to the first end of the first capacitor, and the output end of the buck chip outputs the second operating voltage.

[0026] In the multi-channel conference unit charging device described in the utility model, the voltage and current monitoring module includes: a multi-channel voltage and current detection circuit; the overcharge and overcurrent protection module includes: a multi-channel overcharge and overcurrent protection circuit;

[0027] Each of the voltage and current detection circuits is respectively connected to the MCU control module, and is used to perform voltage and current detection on the conference unit connected thereto according to the control of the MCU control module and output corresponding charging information;

[0028] Each of the overcharge and overcurrent protection circuits performs overcharge and overcurrent monitoring and protection on the conference unit connected thereto.

[0029] In the multi-channel conference unit charging device described in the utility model, each voltage and current detection circuit includes: a voltage and current detection chip and a sampling circuit;

[0030] The communication end of the voltage and current detection chip is connected to the MCU control module, and the sampling end of the voltage and current detection chip is connected to the sampling circuit;

[0031] The sampling circuit samples the voltage and current of the conference unit connected thereto and outputs a sampling signal;

[0032] The voltage and current detection chip processes the sampling signal and outputs charging information to the MCU control module.

[0033] In the multi-channel conference unit charging device of the utility model, each of the overcharge and overcurrent protection circuits comprises: an overcharge and overcurrent protection chip and a charging indication module;

[0034] The overcharge and overcurrent protection chip is connected to the connected conference unit and is used to perform overcharge and overcurrent detection and protection on the connected conference unit;

[0035] The charging indication module is connected to the overcharge and overcurrent protection chip, and is used to execute charging indication according to the control of the overcharge and overcurrent protection chip.

[0036] In the multi-channel conference unit charging device described in the utility model, the alarm indication module includes: a multi-channel LED alarm indication circuit and a buzzer alarm indication circuit;

[0037] Each LED alarm indication circuit is connected to the MCU control module respectively, and the buzzer alarm indication circuit is connected to the MCU control module;

[0038] Each LED alarm indication circuit includes: a current limiting resistor and an LED indicator light; the buzzer alarm indication circuit includes: an input resistor, a first transistor and a buzzer;

[0039] The input end of the current limiting resistor is connected to the second working voltage, the output end of the current limiting resistor is connected to the anode of the LED indicator light, and the cathode of the LED indicator light is connected to the MCU control module; the input end of the input resistor is connected to the MCU control module, the output end of the input resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the second working voltage, the emitter of the first transistor is connected to the input end of the buzzer, and the output end of the buzzer is grounded.

[0040] The implementation of the multi-channel conference unit charging device of the utility model has the following beneficial effects: including: an input unit and a charging management unit; the input unit includes: a first protection switch, a power conversion module and a second protection switch; the charging management unit includes: a weak current conversion protection module and a charging interface module; the charging interface module includes: multiple wired charging interfaces and multiple wireless charging interfaces; the power conversion module receives the AC mains power transmitted through the first protection switch and converts the AC mains power into DC power; the weak current conversion protection module generates the working voltage required by the charging management unit after filtering and dividing the DC power and provides a charging signal to the charging interface module; multiple wired charging interfaces and / or multiple wireless charging interfaces transmit the charging signal to one or more connected conference units. The utility model can charge multiple conference units at the same time without removing the battery, which significantly improves the charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0042] Figure 1It is a functional block diagram of the multi-channel conference unit charging device provided by the utility model;

[0043] Figure 2 It is a circuit diagram of the weak current conversion module provided by the utility model;

[0044] Figure 3 It is a circuit diagram of the MCU control module provided by the utility model;

[0045] Figure 4 It is an interface circuit diagram of the alarm indication module and the display module provided by the utility model;

[0046] Figure 5 and Figure 6 This is a circuit diagram of an 8-way voltage and current monitoring module provided by the utility model;

[0047] Figure 7 It is a circuit diagram of 8 wireless charging interfaces provided by the utility model;

[0048] Figures 8 to 11 It is a circuit diagram of an 8-way overcharge and overcurrent protection circuit provided by the utility model;

[0049] Fig.12 and Fig.13 It is a circuit diagram of 8 wired charging interfaces provided by the utility model. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] Figure 1 The functional block diagram of a preferred embodiment of the multi-channel conference unit charging device provided by the utility model is shown.

[0052] like Figure 1 As shown, the multi-channel conference unit charging device includes: an input unit 10 and a charging management unit 20.

[0053] Among them, the input unit 10 includes: a first protection switch 11, a power conversion module 12 and a second protection switch 13. The charging management unit 20 includes: a weak current conversion protection module 21 and a charging interface module 27; the charging interface module 27 includes: multiple wired charging interfaces and multiple wireless charging interfaces. The input end of the first protection switch 11 is connected to the AC mains, the output end of the first protection switch 11 is connected to the input end of the power conversion module 12, the output end of the power conversion module 12 is connected to the input end of the second protection switch 13, the output end of the second protection switch 13 is connected to the input end of the weak current conversion protection module 21, and the output end of the weak current output module is connected to the charging interface module 27.

[0054] The power conversion module 12 receives the AC mains power transmitted through the first protection switch 11, and converts the AC mains power into DC power, so as to transmit the DC power to the weak current conversion protection module 21 through the second protection switch 13; the weak current conversion protection module 21 generates the working voltage required by the charging management unit 20 after filtering and voltage division processing of the DC power, and provides a charging signal to the charging interface module 27; multiple wired charging interfaces are used to transmit the charging signal to one or more connected conference units, and multiple wireless charging interfaces are used to transmit the charging signal to one or more connected conference units. In this example, the first protection switch 11 is a strong current protection switch, which is a switch commonly used for the AC mains input port in the circuit. It plays a role of strong current protection. If the voltage exceeds its load, it can be disconnected to achieve the purpose of protecting the charging device. The second protection switch 13 is a weak current protection switch, which plays a role of weak current protection. That is, when the voltage or current flowing through it exceeds its load, it will also be disconnected, which also achieves the purpose of protecting the charging device. The power conversion module 12 can adopt an existing module as long as it can rectify, filter and step down the AC 220V into 5V DC.

[0055] Specifically, when the multi-channel conference unit charging device is not working, the first protection switch 11 and the second protection switch 13 are in the open state. When the multi-channel conference unit charging device is working, the first protection switch 11 and the second protection switch 13 are closed. At this time, the 220V AC mains is connected to the power conversion module 12 through the first protection switch 11, and the power conversion module 12 converts, filters, and steps down the 220V AC mains into a 5V DC output, and then inputs it into the weak current conversion protection module 21 in the charging management unit 20 through the second protection switch 13. The weak current conversion protection module 21 filters and divides the 5V DC to obtain the working voltage required by each module in the charging management unit 20 and provides a 5V / 1.5A charging signal for multiple wireless charging interfaces and multiple wired charging interfaces; when one or more conference units are connected to one or more wireless charging interfaces or one or more wired charging interfaces, the corresponding charging interface outputs a charging signal to the conference unit to charge it, thereby achieving the purpose of charging multiple conference units at the same time, achieving high efficiency, high reliability, visual intelligent charging, and improving user experience. During actual use, the conference unit only needs to be directly connected to the wired charging interface or the wireless charging interface, and the first protection switch 11 and the second protection switch 13 are closed to charge the conference unit without removing the battery, and multiple conference units can be charged at the same time.

[0056] Optionally, in this embodiment, the weak current conversion protection module 21 includes: a voltage processing module and multiple voltage conversion modules; the voltage processing module is connected to the output end of the second protection switch 13, and the output end of the voltage processing module is respectively connected to multiple voltage conversion modules; the voltage processing module is used to filter the direct current to obtain a first working voltage and a charging signal; each voltage conversion module divides the first working voltage to generate a second working voltage.

[0057] Furthermore, in this embodiment, if Figure 1 As shown, the charging management unit 20 also includes: an MCU control module 22 and a voltage and current monitoring module 23.

[0058] The voltage and current monitoring module 23 is connected to the MCU control module 22 and is used to perform voltage and current monitoring on the connected conference unit according to the control of the MCU control module 22 and output charging information of the connected conference unit.

[0059] Optionally, in this embodiment, the voltage and current monitoring module 23 includes: multiple voltage and current detection circuits; each voltage and current detection circuit is respectively connected to the MCU control module 22, and is used to perform voltage and current detection on the conference unit connected thereto according to the control of the MCU control module 22 and output corresponding charging information.

[0060] Each voltage and current detection circuit includes: a voltage and current detection chip and a sampling circuit; the communication end of the voltage and current detection chip is connected to the MCU control module 22, and the sampling end of the voltage and current detection chip is connected to the sampling circuit; the sampling circuit samples the voltage and current of the conference unit connected thereto and outputs a sampling signal; the voltage and current detection chip processes the sampling signal and outputs charging information to the MCU control module 22. The sampling circuit uses Kelvin wiring.

[0061] like Figure 1 As shown, the charging management unit 20 further includes: a display module 26 and an alarm indication module 25 connected to the MCU control module 22 .

[0062] The display module 26 displays the charging information transmitted by the MCU control module 22 ; the alarm indication module 25 outputs an alarm according to the alarm signal output by the MCU control module 22 .

[0063] Optionally, in this embodiment, the alarm indication module 25 includes: multiple LED alarm indication circuits and buzzer alarm indication circuits; each LED alarm indication circuit is respectively connected to the MCU control module 22, and the buzzer alarm indication circuit is connected to the MCU control module 22; each LED alarm indication circuit includes: a current limiting resistor and an LED indicator light; the buzzer alarm indication circuit includes: an input resistor, a first transistor and a buzzer; the input end of the current limiting resistor is connected to the second working voltage, the output end of the current limiting resistor is connected to the anode of the LED indicator light, and the cathode of the LED indicator light is connected to the MCU control module 22; the input end of the input resistor is connected to the MCU control module 22, the output end of the input resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the second working voltage, the emitter of the first transistor is connected to the input end of the buzzer, and the output end of the buzzer is grounded.

[0064] like Figure 1 As shown, the charging management unit 20 also includes: an overcharge and overcurrent protection module 24; the overcharge and overcurrent protection module 24 is connected to the connected conference unit, and performs overcharge and overcurrent monitoring and protection on the connected conference unit.

[0065] Optionally, in this embodiment, the overcharge and overcurrent protection module 24 includes: a plurality of overcharge and overcurrent protection circuits; each overcharge and overcurrent protection circuit performs overcharge and overcurrent monitoring and protection on the conference unit connected thereto.

[0066] Among them, each overcharge and overcurrent protection circuit includes: an overcharge and overcurrent protection chip and a charging indication module; the overcharge and overcurrent protection chip is connected to the connected conference unit, and is used to perform overcharge and overcurrent detection and protection on the connected conference unit; the charging indication module is connected to the overcharge and overcurrent protection chip, and is used to execute charging instructions according to the control of the overcharge and overcurrent protection chip.

[0067] In this embodiment, the display module 26 can be used to display the current voltage, current, power and other charging information of each charging conference unit. The charging indication module is used to indicate the charging of the conference unit, such as charging (indicated by a red light) and fully charged (indicated by a green light). By setting the overcharge and overcurrent protection module 24, the maximum charging voltage and current of the conference unit battery can be limited to prevent the conference unit from overcharging, overcurrent and heating and causing safety accidents; the alarm indication module 25 can beep and indicate the alarm for abnormal moderate, open circuit, overcurrent, overcharging and other faults detected by the system; the MCU control module 22 can realize electrical control of various functional modules of the charging unit. Among them, the MCU control module 22 is connected through I 2 C realizes the control of the voltage and current detection module; realizes the control of the display module 26 through SPI; realizes the control of each alarm indication function through GPIO.

[0068] The multi-channel conference unit charging device integrates a variety of charging protection measures, effectively protecting against abnormal conditions such as overcharging, overcurrent, open circuit, short circuit, etc., to prevent equipment from causing safety accidents. It can monitor the voltage, current and power information of the charging conference unit in real time, and can realize charging management of multiple conference units at the same time (such as Figure 1 As shown, the charging management of conference unit 1, conference unit 2, ..., conference unit N, a total of N conference units, can be performed simultaneously), and two charging methods, USB wired charging and contact wireless charging, are supported, achieving high-efficiency, high-reliability, visual intelligent charging, and improving user experience.

[0069] The following is a specific example for explanation. Figures 2 to 13 The following is a circuit diagram of a preferred embodiment of the utility model.

[0070] Figure 2 This is the circuit diagram of the weak current conversion module. Figure 2 As shown, in this embodiment, the voltage processing module includes: a second capacitor C2, a third capacitor C3, a first chip U1, a first voltage regulator ZD1, a first inductor L1, a fourth capacitor C4, a fifth capacitor C5, a first resistor R1, a second light-emitting diode D2 and a first capacitor C1; each voltage conversion module includes: a step-down chip.

[0071] The first end of the second capacitor C2, the first end of the third capacitor C3 and the first pin of the first chip U1 are connected to the output end of the second protection switch 13, the second end of the second capacitor C2 and the second end of the third capacitor C3 are grounded, the second pin of the first chip U1 is respectively connected to the cathode of the first voltage regulator ZD1 and the first end of the first inductor L1, the anode of the first voltage regulator ZD1 is grounded, the second end of the first inductor L1 is connected to the first end of the fourth capacitor C4, the first end of the fifth capacitor C5, the first end of the first resistor R1 and the first end of the first capacitor C1, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5 and the second end of the first capacitor C1 are grounded, the second end of the first resistor R1 is connected to the anode of the second light-emitting diode D2, and the cathode of the second light-emitting diode D2 is grounded; the first end of the first capacitor C1 generates a first working voltage and a charging signal; the input end of the buck chip is connected to the first end of the first capacitor C1, and the output end of the buck chip outputs a second working voltage. Among them, the first working voltage is 5V, and the second working voltage is 3.3V.

[0072] like Figure 2 As shown, U1 is the first chip, U4, U5, and U6 are step-down chips, wherein the second working voltage (i.e., BL3.3V) output by U4 is transmitted to the alarm indication module 25, the second working voltage (i.e., F310-3.3V) output by U5 is transmitted to the MCU control module 22, and the second working voltage (i.e., POWER-3.3V) output by U6 is transmitted to the MCU control module 22.

[0073] Figure 3 FIG. 2 is a circuit diagram of the MCU control module 22. Figure 3 As shown, the MCU control module 22 includes: an MCU control chip U10 and peripheral circuits. Among them, the fourth pin of U10 is connected to the F310-3.3V voltage, the 9th and 10th pins of U10 are used to control 8-way voltage and current detection circuits, the 19th to 23rd pins of U10 are used to control 5-way LED alarm indication circuits, the 26th pin of U10 is used to control the buzzer, the 2nd, 32nd, 31st and 30th pins of U10 are used to control the display screen, and the interface of the display screen is as shown in FIG. Figure 4 As shown in CN1 in .

[0074] like Figure 4As shown, in this embodiment, the 5-way LED alarm indication circuit includes: LEDGND1, LEDGND2, LEDGND3, LEDGND4 and LEDGND5. LEDGND1 includes a resistor R65 and a light-emitting diode D3; LEDGND2 includes: a resistor R69 and a light-emitting diode D4; LEDGND3 includes: a resistor R66 and a light-emitting diode D5; LEDGND4 includes: a resistor R67 and a light-emitting diode D6; LEDGND5 includes: a resistor R68 and a light-emitting diode D7.

[0075] like Figure 4 As shown, the first end of the resistor R65 is connected to BL3.3V, the second end of the resistor R65 is connected to the anode of the light-emitting diode D3, and the cathode of the light-emitting diode D3 is connected to the 23rd pin of U10; the first end of the resistor R69 is connected to BL3.3V, the second end of the resistor R69 is connected to the anode of the light-emitting diode D4, and the cathode of the light-emitting diode D4 is connected to the 22nd pin of U10; the first end of the resistor R66 is connected to BL3.3V, the second end of the resistor R66 is connected to the anode of the light-emitting diode D5, and the cathode of the light-emitting diode D5 is connected to the 21st pin of U10; the first end of the resistor R67 is connected to BL3.3V, the second end of the resistor R67 is connected to the anode of the light-emitting diode D6, and the cathode of the light-emitting diode D6 is connected to the 20th pin of U10; the first end of the resistor R68 is connected to BL3.3V, the second end of the resistor R68 is connected to the anode of the light-emitting diode D7, and the cathode of the light-emitting diode D7 is connected to the 19th pin of U10. A first end of resistor R63 is connected to pin 26 of U10, a second end of resistor R63 is connected to the base of transistor Q1, a collector of transistor Q1 is connected to INA1-3.30V, an emitter of transistor Q1 is connected to pin 1 of the buzzer, and a second pin of the buzzer is grounded.

[0076] like Figure 5 and Figure 6 The figure shows the circuit diagram of the 8-way voltage and current detection circuit. The structure and principle of each voltage and current detection circuit are the same, that is, the 8-way voltage and current detection circuit uses INA226 to monitor the charging of the 8-way conference unit. The following is an explanation of one of the circuits (U2) as an example.

[0077] like Figure 5 As shown, the voltage and current detection circuit includes: voltage and current detection chip U2 and its peripheral circuits, and the sampling circuit includes: resistor R2, resistor R4, resistor R5 and capacitor C6. Figure 5As shown, the 4th pin of U2 is connected to the 9th pin of U10 through the resistor R9, the 5th pin of U2 is connected to the 10th pin of U10 through the resistor R14, the 10th pin of U2 is connected to the second end of the resistor R4 and the first end of the capacitor C6, the first end of the resistor R4 and the first end of the resistor R2 are connected and connected to VCC5V, the second end of the resistor R2 is connected to the first end of the resistor R5, and the connection end between the second end of the resistor R2 and the first end of the resistor R5 is also connected to the charging interface (i.e., the 1st pin of the contact J1 and the 1st pin of the USB interface J9), and the second end of the resistor R5 is connected to the second end of the capacitor C6 and the 9th pin of U2.

[0078] in, Figure 7 The circuit diagram of 8 wireless charging interfaces is a contact interface, specifically J1 to J8 in the figure; Fig.12 and Fig.13 This is the circuit diagram of 8 wireless charging interfaces, all of which are USB charging interfaces. Fig.12 As shown in J9, J11, J12, J13, J14, J15, J16 and J17.

[0079] like Figures 8 to 11 As shown in the figure, it is a circuit diagram of 8-way overcharge and overcurrent protection circuit, wherein the structure and principle of each overcharge and overcurrent protection circuit are the same, that is, the 8-way overcharge and overcurrent protection circuit realizes overcharge and overcurrent detection and protection through ZXCT1009FTA. The following takes one of the circuits (U15) as an example for explanation.

[0080] like Figure 8 As shown, U15 is an overcharge and overcurrent protection chip, and resistor R84, resistor R90, resistor R87, transistor S8050, resistor R94, resistor R91, resistor R96, MOS tube Q6, light-emitting diode D12, resistor R82, resistor R86, MOS tube Q3, light-emitting diode D10 and resistor R80 are a charging indication module.

[0081] The second pin of U15 is connected to the first end of R78 and the second end of the fuse FB1, the first end of the fuse FB1 is connected to a 5V voltage, the third pin of U15 is connected to the second end of the resistor R78 and connected to the BAT-E charging interface, the first pin of U15 is connected to ground through resistors R84 and R90 in sequence, the first end of resistor R87 is connected to the connection end of resistors R84 and R90, the second end of resistor R87 is connected to the base of transistor S8050, the collector of transistor S8050 and the first end of resistor R82 are connected to VCC5V, the emitter of transistor S8050 is connected to VCC5V through the voltage The resistor R94 is grounded and connected to the gate of the MOS tube Q6 through the resistor R91. The source of the MOS tube Q6 is grounded. The resistor R96 is connected between the gate and the source of the MOS tube Q6. The drain of the MOS tube Q6 is connected to the cathode of the light-emitting diode D12 and the first end of the resistor R86. The anode of the light-emitting diode D12 is connected to the second end of the resistor R82. The second end of the resistor R86 is connected to the gate of the MOS tube Q3. The source of the MOS tube Q3 is grounded. The drain of the MOS tube Q3 is connected to the cathode of the light-emitting diode D10. The anode of the light-emitting diode D10 is connected to VCC5V through the resistor R80.

[0082] like Figure 8 As shown, when the conference unit connected to BAT-E is charging, the light-emitting diode D12 lights up red, indicating that the conference unit is in a charging state; when the conference unit is fully charged, the light-emitting diode D12 goes out, and at this time, the light-emitting diode D10 lights up green, indicating that the conference unit is fully charged.

[0083] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model. All equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A multi-channel conference unit charging device, characterized in that: include: Input unit and charge management unit; The input unit includes: a first protection switch, a power conversion module and a second protection switch; The charging management unit includes: a weak current conversion protection module and a charging interface module; the charging interface module includes: a plurality of wired charging interfaces and a plurality of wireless charging interfaces; The input end of the first protection switch is connected to the AC mains, the output end of the first protection switch is connected to the input end of the power conversion module, the output end of the power conversion module is connected to the input end of the second protection switch, the output end of the second protection switch is connected to the input end of the weak current conversion protection module, and the output end of the weak current output module is connected to the charging interface module; The power conversion module receives the AC mains power transmitted through the first protection switch, and converts the AC mains power into DC power, so as to transmit the DC power to the weak current conversion protection module through the second protection switch; The weak current conversion protection module performs filtering and voltage division processing on the direct current to generate the working voltage required by the charging management unit and provides a charging signal to the charging interface module; The multiple wired charging interfaces are used to transmit the charging signal to one or more connected conference units, and the multiple wireless charging interfaces are used to transmit the charging signal to one or more connected conference units.

2. The multi-channel conference unit charging device according to claim 1, characterized in that: The charging management unit also includes: an MCU control module and a voltage and current monitoring module; The voltage and current monitoring module is connected to the MCU control module, and is used to perform voltage and current monitoring on the connected conference unit according to the control of the MCU control module and output charging information of the connected conference unit.

3. The multi-channel conference unit charging device according to claim 2, characterized in that: The charging management unit also includes: a display module and an alarm indication module connected to the MCU control module; The display module displays the charging information transmitted by the MCU control module; The alarm indication module performs an alarm output according to the alarm signal output by the MCU control module.

4. The multi-channel conference unit charging device according to claim 2, characterized in that: The charging management unit also includes: an overcharge and overcurrent protection module; The overcharge and overcurrent protection module is connected to the connected conference unit, and performs overcharge and overcurrent monitoring and protection on the connected conference unit.

5. The multi-channel conference unit charging device according to claim 2, characterized in that: The weak current conversion protection module includes: a voltage processing module and a plurality of voltage conversion modules; The voltage processing module is connected to the output end of the second protection switch, and the output ends of the voltage processing module are respectively connected to the multiple voltage conversion modules; The voltage processing module is used to filter the direct current to obtain the first working voltage and the charging signal; Each of the voltage conversion modules performs voltage division processing on the first operating voltage to generate a second operating voltage.

6. The multi-channel conference unit charging device according to claim 5, characterized in that: The voltage processing module includes: a second capacitor, a third capacitor, a first chip, a first voltage regulator, a first inductor, a fourth capacitor, a fifth capacitor, a first resistor, a second light-emitting diode and a first capacitor; each voltage conversion module includes: a step-down chip; The first end of the second capacitor, the first end of the third capacitor and the first pin of the first chip are connected to the output end of the second protection switch, the second end of the second capacitor and the second end of the third capacitor are grounded, the second pin of the first chip is respectively connected to the cathode of the first voltage regulator and the first end of the first inductor, the anode of the first voltage regulator is grounded, the second end of the first inductor is connected to the first end of the fourth capacitor, the first end of the fifth capacitor, the first end of the first resistor and the first end of the first capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the second end of the first capacitor are grounded, the second end of the first resistor is connected to the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is grounded; The first end of the first capacitor generates the first operating voltage and the charging signal; the input end of the buck chip is connected to the first end of the first capacitor, and the output end of the buck chip outputs the second operating voltage.

7. The multi-channel conference unit charging device according to claim 4, characterized in that: The voltage and current monitoring module includes: a multi-channel voltage and current detection circuit; the overcharge and overcurrent protection module includes: a multi-channel overcharge and overcurrent protection circuit; Each of the voltage and current detection circuits is respectively connected to the MCU control module, and is used to perform voltage and current detection on the conference unit connected thereto according to the control of the MCU control module and output corresponding charging information; Each of the overcharge and overcurrent protection circuits performs overcharge and overcurrent monitoring and protection on the conference unit connected thereto.

8. The multi-channel conference unit charging device according to claim 7, characterized in that: Each voltage and current detection circuit includes: a voltage and current detection chip and a sampling circuit; The communication end of the voltage and current detection chip is connected to the MCU control module, and the sampling end of the voltage and current detection chip is connected to the sampling circuit; The sampling circuit samples the voltage and current of the conference unit connected thereto and outputs a sampling signal; The voltage and current detection chip processes the sampling signal and outputs charging information to the MCU control module.

9. The multi-channel conference unit charging device according to claim 7, characterized in that: Each of the overcharge and overcurrent protection circuits comprises: an overcharge and overcurrent protection chip and a charging indication module; The overcharge and overcurrent protection chip is connected to the connected conference unit and is used to perform overcharge and overcurrent detection and protection on the connected conference unit; The charging indication module is connected to the overcharge and overcurrent protection chip, and is used to execute charging indication according to the control of the overcharge and overcurrent protection chip.

10. The multi-channel conference unit charging device according to claim 3, characterized in that: The alarm indication module includes: a multi-channel LED alarm indication circuit and a buzzer alarm indication circuit; Each LED alarm indication circuit is connected to the MCU control module respectively, and the buzzer alarm indication circuit is connected to the MCU control module; Each LED alarm indication circuit includes: a current limiting resistor and an LED indicator light; the buzzer alarm indication circuit includes: an input resistor, a first transistor and a buzzer; The input end of the current limiting resistor is connected to the second working voltage, the output end of the current limiting resistor is connected to the anode of the LED indicator light, and the cathode of the LED indicator light is connected to the MCU control module; the input end of the input resistor is connected to the MCU control module, the output end of the input resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the second working voltage, the emitter of the first transistor is connected to the input end of the buzzer, and the output end of the buzzer is grounded.

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