Wireless charging system of wireless clamp type graph phase voltammeter

Abstract

The utility model discloses a wireless charging system of a wireless clamp type pattern phase voltammeter. The wireless charging system comprises a wireless charging transmitting terminal and a wireless charging receiving terminal. The wireless charging transmitting terminal comprises an inverter circuit and a transmitting coil. The wireless charging receiving end comprises a receiving coil, a rectifying circuit, a battery unit and a power management unit; the transmitting coil is used for generating electromagnetic induction with the receiving coil and transmitting and receiving wireless signals; the input end of the inverter circuit receives an external direct current power supply and is used for converting direct current into alternating current; the transmitting coil is connected with the output end of the inverter circuit; the rectifying circuit is connected with the receiving coil and is used for converting alternating current into direct current and transmitting the direct current to the power management unit; the power management unit is connected with the battery unit and used for controlling charging of the battery unit. The electric terminal equipment is a phase voltammeter and a current clamp. According to the utility model, the problem that the current clamp wireless acquisition cannot be realized by the current graph phase voltammeter is solved.

Description

Technical Field

[0001] The utility model relates to a wireless charging technology, in particular to a wireless charging system of a wireless clamp-type graphic phase volt-ampere meter. Background Art

[0002] With the rapid development of science and technology, lithium batteries are widely used as the main power source in electric energy metering devices, especially in graphic phase volt-ampere meters and other equipment, where the use of lithium batteries has become dominant. This is mainly due to the excellent characteristics of lithium batteries, such as high energy density, excellent service life, strong power tolerance, low self-discharge rate, excellent high and low temperature adaptability, and green and environmentally friendly production process. However, despite the many advantages of lithium batteries, regular charging operations are still required during their use to ensure the continuous operation of the equipment.

[0003] The traditional charging method requires users to physically connect the charging module to the device equipped with the lithium battery through a charging cable, and then plug the charging module into a power outlet for charging. This operation method is not only inefficient, but may also cause wear and tear on the device interface due to frequent plugging and unplugging, increasing the maintenance cost of the device. At the same time, the existence of the charging cable also limits the scope of use of the device and reduces the portability of the device. In addition, improper charging operation may also cause safety issues such as electric shock, short circuit, etc., bringing potential risks to users. Therefore, it is particularly important to develop a new type of wireless charging system to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a wireless charging system for a wireless clamp-type graphic phase volt-ampere meter to solve the problem that the current graphic phase volt-ampere meter cannot achieve wireless current clamp collection.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] A wireless charging system for a wireless clamp-type graphic phase volt-ampere meter, comprising a wireless charging transmitting end and a wireless charging receiving end;

[0007] The wireless charging transmitting end includes an inverter circuit and a transmitting coil;

[0008] The wireless charging receiving end includes a receiving coil, a rectifier circuit, a battery unit and a power management unit;

[0009] The transmitting coil is used to generate electromagnetic induction with the receiving coil to send and receive wireless signals;

[0010] The input end of the inverter circuit receives an external DC power supply for converting DC power into AC power; the transmitting coil is connected to the output end of the inverter circuit;

[0011] The rectifier circuit is connected to the receiving coil to convert AC power into DC power and transmit it to the power management unit; the power management unit is connected to the battery unit to control the charging of the battery unit; the power management unit is also used to connect to the power terminal equipment, which is a phase volt-ampere meter and a current clamp.

[0012] Furthermore, the wireless charging transmitter also includes a transmitter control circuit, which is connected to the inverter circuit and the receiving coil respectively, and is used to control the inverter circuit and receive information from the transmitting coil and perform detection.

[0013] Furthermore, the wireless charging receiving end also includes a receiving end control circuit, which is used to collect the real-time charging voltage value of the battery unit and adjust the charging current according to the received real-time charging voltage value; the receiving end control circuit is also used to control the receiving coil, modulate the signal sent by the receiving coil, and demodulate the amplitude shift keying signal coupled into the receiving coil.

[0014] Furthermore, the battery unit includes a battery module and a battery monitoring unit; the battery module is used to store rechargeable lithium batteries of power-consuming terminal equipment, and the battery monitoring unit is used to measure the real-time voltage value of the lithium battery.

[0015] Furthermore, the wireless charging receiving end also includes a temperature collection unit for collecting the temperature of the power terminal or the lithium battery.

[0016] Furthermore, the inverter circuit is a half-bridge inverter circuit or a full-bridge inverter circuit.

[0017] Furthermore, the rectifier circuit is a full-bridge rectifier circuit, and the number of K controllable switch tubes of the full-bridge rectifier circuit is four.

[0018] Furthermore, the inverter chip of the inverter circuit is NCE4606.

[0019] Furthermore, the control circuit chip is a JR5218B chip.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] When using the wireless charging system of the wireless clamp-type graphic phase volt-ampere meter provided by this embodiment, when you want to charge, you only need to place the phase volt-ampere meter and its clamp meter at the position of the wireless charging transmitter to achieve wireless charging. The new wireless charging system of the wireless clamp-type graphic phase volt-ampere meter can not only solve the efficiency problems and safety risks brought by traditional wired charging, but also adapt to special shapes and structures of equipment such as graphic phase volt-ampere meters, improving the convenience and efficiency of charging. The introduction of wireless charging technology will greatly improve the user experience of electric energy metering devices, reduce maintenance costs, and improve the safety and service life of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the composition of a wireless charging system of a wireless clamp-type graphic phase volt-ampere meter provided in an embodiment of the utility model;

[0023] Figure 2 An inverter circuit for the wireless charging transmitter of a wireless clamp-type graphic phase volt-ampere meter;

[0024] Figure 3 A wireless charging receiving end circuit for a wireless clamp-type graphic phase volt-ampere meter;

[0025] In the figure: 1. wireless charging transmitter; 2. wireless charging receiver; 11. inverter circuit; 12. transmitter control circuit; 13. transmitter coil; 21. receiver coil; 22. rectifier circuit; 23. receiver control circuit; 24. battery unit; 25. power management unit. DETAILED DESCRIPTION

[0026] Example:

[0027] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] See also Figure 1-3 As shown, the wireless charging system of the wireless clamp-type graphic phase volt-ampere meter provided in this embodiment mainly includes a wireless charging transmitting end 1 and a wireless charging receiving end 2.

[0029] The wireless charging transmitting end 1 includes an inverter circuit 11 and a transmitting coil 13 ; the wireless charging receiving end 2 includes a receiving coil 21 , a rectifier circuit 22 , a battery unit 24 and a power management unit 25 .

[0030] The inverter circuit 11 can be a half-bridge inverter circuit or a full-bridge inverter circuit. The input end of the inverter circuit 11 is used to receive an external DC 5V power supply and convert DC power into AC power. The transmitting coil 13 is connected to the output end of the inverter circuit 11. The transmitting coil 13 of the wireless charging transmitting end 1 is used to generate electromagnetic induction with the receiving coil 21 of the wireless charging receiving end 2 to send and receive wireless signals.

[0031] The rectifier circuit 22 is connected to the receiving coil 21 to convert AC power into DC power and transmit the output stable voltage to the power management unit 25. The power management unit 25 is connected to the battery unit 24 to control the battery charging and can also be connected to the power consumption terminal, i.e., the phase volt-ampere meter and the current clamp, to directly power the phase volt-ampere meter and the current clamp, thereby realizing wireless charging.

[0032] It can be seen that when using the wireless charging system of the wireless clamp-type graphic phase volt-ampere meter provided in this embodiment, when charging is desired, it is only necessary to place the phase volt-ampere meter and its clamp meter at the position of the wireless charging transmitter to realize wireless charging.

[0033] Preferably, the wireless charging transmitter 1 further includes a transmitter control circuit 12, which is used to control the inverter circuit 11, and can also receive and detect information received by the transmitter coil 13, modulate the signal sent by the transmitter coil 13, and demodulate the amplitude shift keying signal coupled into the transmitter coil 13. When the transmitter coil 13 receives the signal transmitted by the wireless charging receiving terminal 2, it is necessary to detect, judge the information received by the transmitter coil 13, and return the information to the 4-pin DIN1 of the JR5208B energy wireless transmission dedicated chip, so as to further control the transmission energy of the transmitter coil 13.

[0034] Preferably, the wireless charging receiving end 2 further includes a receiving end control circuit 23, which is used to control the receiving coil 21. The receiving end control circuit is used to collect the real-time charging voltage value of the battery unit, adjust the charging current according to the received real-time charging voltage value, and can also be used to control the receiving coil 21, modulate the signal sent by the receiving coil 21, and demodulate the amplitude shift keying signal coupled to the receiving coil 21. The chip of the receiving end control circuit 23 is a JR5218B lithium battery end energy receiving dedicated chip.

[0035] In a specific implementation, the inverter chip of the inverter circuit 11 is NCE4606, the chip of the transmitter control circuit 12 is a JR5208B energy wireless transmission dedicated chip, the 5-pin POUT1 of the transmitter control circuit 12 is the power output control terminal, the output signal drives the inverter through the diode BAT54S, and the 1 and 3 pins of the inverter are grounded and the external DC power supply 5V respectively. The inverter converts DC power into AC power signal, and outputs it to capacitor C5 through pin 5678. The capacitor is 220nF / 250V. The capacitor isolates the output signal from DC and converts it into AC signal for transmission to the transmitting coil.

[0036] In a specific implementation, the battery unit 24 includes a battery module and a battery monitoring unit. The battery module is used to store multiple lithium batteries that need to be rechargeable for power terminal devices. When there is one power terminal device, a lithium battery is directly placed in the battery module. When there are multiple power terminal devices that need to be charged, multiple battery slots are correspondingly arranged in the battery module. The number of power terminals is determined according to whether the wireless clamp-type graphic phase volt-ampere meter is single-phase or three-phase, and whether the host needs wireless charging. The battery module is used to collect the charging voltage of each lithium battery being charged. When there is one lithium battery that needs to be charged, the battery monitoring unit directly measures the real-time voltage value of the lithium battery, that is, completes the collection of the charging voltage; when there are multiple lithium batteries that need to be charged, the battery monitoring unit measures the real-time voltage value of each lithium battery being charged respectively. The collected voltage value is transmitted to the control circuit, and the control circuit adjusts the charging current according to the received charging voltage. For example, when there is only one rechargeable lithium battery, when the charging voltage on it is lower than a preset threshold, the control circuit adjusts the charging current to charge the rechargeable lithium battery quickly; when the charging voltage on the lithium battery reaches a preset threshold, the control circuit reduces or cuts off the charging current to avoid damage to the lithium battery due to excessively high charging voltage. Through the above adjustment process, the lithium battery is effectively protected during the charging process.

[0037] In a specific embodiment, the rectifier circuit 22 is a full-bridge rectifier circuit, and the number of K controllable switch tubes can be four, and the four controllable switch tubes are of model B5817WS, including a first diode D9, a second diode D10, a third diode D11 and a fourth diode D12, and the connection relationship is as follows: Figure 3 The working principle of the power management circuit is as follows: the AC voltage received by the receiving coil is rectified by the bridge rectifier D9-D12, and then filtered by the capacitor C116. The output DC voltage is connected to the source S of the field effect transistor Q9, and the drain D of the field effect transistor Q9 is connected to the power output terminal. The output DC voltage is connected to the gate G of the field effect transistor Q9 through the resistor R62.

[0038] The working principle of the battery detection unit circuit is as follows: the 6-pin BVC of the control circuit chip JR5218B is the battery voltage detection terminal, and the 7-pin BIC is the battery current detection terminal. The voltage flowing through the line charges the lithium battery, and the BVC terminal detects the voltage of the battery after the voltage is divided by R59 and R64.

[0039] The wireless charging transmitter can receive the charging status information from the receiving coil of the wireless charging receiver through the transmitting coil. The charging status information received by the transmitting coil is information modulated by ASK. The wireless charging transmitter can demodulate the charging status information modulated by ASK through the control circuit. The charging status information can carry the charging capacity information of the rechargeable battery and the charging capacity information of the power-consuming device. If the charging capacity information does not reach the threshold, a fast charging information is sent to the wireless charging receiver. If the charging capacity information reaches the threshold, a stop charging information is sent to the wireless charging receiver. The wireless charging transmitter and the receiver can communicate the protocol and identify the type of power-consuming device and the voltage and current capabilities.

[0040] The wireless charging receiving end may also include a temperature acquisition unit for collecting the temperature of the power terminal or the lithium battery. The temperature acquisition unit is connected to the power management unit, and is used to reduce the current charging current when the terminal temperature collected by the temperature acquisition unit is greater than the preset temperature threshold, and charge the battery according to the reduced current. In this way, the overheating protection of the battery can be achieved, ensuring that the temperature of the battery and the back shell of the terminal is not too high, avoiding damage to the battery life, and also reducing the overall temperature of the terminal, balancing and ensuring the charging efficiency, charging freedom and charging speed, and improving the user experience.

[0041] It can be seen that the wireless charging system of the wireless clamp-type graphic phase volt-ampere meter provided in this embodiment can not only solve the efficiency problems and safety risks brought by traditional wired charging, but also adapt to devices with special shapes and structures such as graphic phase volt-ampere meters, improving their charging convenience and efficiency. The introduction of wireless charging technology will greatly improve the user experience of electric energy metering devices, reduce maintenance costs, and improve the safety and service life of equipment.

[0042] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable ordinary technicians in the field to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the essence of the content of the utility model should be included in the protection scope of the utility model.

Claims

1. A wireless charging system for a wireless clamp-type graphic phase volt-ampere meter, characterized in that: Including a wireless charging transmitter and a wireless charging receiver; The wireless charging transmitting end includes an inverter circuit and a transmitting coil; The wireless charging receiving end includes a receiving coil, a rectifier circuit, a battery unit and a power management unit; The transmitting coil is used to generate electromagnetic induction with the receiving coil to send and receive wireless signals; The input end of the inverter circuit receives an external DC power supply for converting DC power into AC power; the transmitting coil is connected to the output end of the inverter circuit; The rectifier circuit is connected to the receiving coil to convert AC power into DC power and transmit it to the power management unit; the power management unit is connected to the battery unit to control the charging of the battery unit; the power management unit is also used to connect to the power terminal equipment, which is a phase volt-ampere meter and a current clamp.

2. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter according to claim 1, characterized in that: The wireless charging transmitter also includes a transmitter control circuit, which is connected to the inverter circuit and the receiving coil respectively, and is used to control the inverter circuit and receive information from the transmitting coil and perform detection.

3. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter according to claim 1 or 2, characterized in that: The wireless charging receiving end also includes a receiving end control circuit, which is used to collect the real-time charging voltage value of the battery unit and adjust the charging current according to the received real-time charging voltage value; the receiving end control circuit is also used to control the receiving coil, modulate the signal sent by the receiving coil, and demodulate the amplitude shift keying signal coupled into the receiving coil.

4. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter as claimed in claim 3, characterized in that: The battery unit includes a battery module and a battery monitoring unit; the battery module is used to store the rechargeable lithium battery of the power terminal equipment, and the battery monitoring unit is used to measure the real-time voltage value of the lithium battery.

5. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter as claimed in claim 4, characterized in that: The wireless charging receiving end also includes a temperature collection unit for collecting the temperature of the power terminal or the lithium battery.

6. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter according to claim 1, characterized in that: The inverter circuit is a half-bridge inverter circuit or a full-bridge inverter circuit.

7. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter according to claim 1, characterized in that: The rectifier circuit is a full-bridge rectifier circuit, and the number of K controllable switch tubes of the full-bridge rectifier circuit is four.

8. The wireless charging system of the wireless clamp-type graphic phase volt-ampere meter according to claim 1 or 6, characterized in that: The inverter chip of the inverter circuit is NCE4606.

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