Gallium nitride rapid charger

Abstract

The utility model relates to the technical field of chargers, in particular to a gallium nitride rapid charger which comprises a shell, a working cavity is arranged in the shell, an input loop, a switch control loop, a transformer output loop and a protocol output loop which are electrically connected in sequence are arranged in the working cavity, and a plug connected with the input loop is arranged on the shell. The switch control loop comprises a switch control chip, a gallium nitride power switch and a temperature sensor, one end of the gallium nitride power switch is connected with the input loop, the other end of the gallium nitride power switch is connected with the transformer output loop, and the switch control chip is connected with the gallium nitride power switch. The switch control chip is used for controlling power regulation of the gallium nitride power switch, and the temperature sensor is installed at the position of the gallium nitride power switch and electrically connected with the switch control chip. The problem that in the prior art, a gallium nitride rapid charger monitors the temperature of a heating element through a thermistor, and the control accuracy is affected is solved.

Description

Technical Field

[0001] This utility model relates to the field of charger technology, specifically to a gallium nitride fast charger. Background Technology

[0002] In existing technologies, gallium nitride (GaN)-based fast chargers consist of an input circuit, a switch control circuit, a transformer output circuit, a protocol chip control circuit, and an output port circuit. Currently, the switch control chip primarily uses offline flyback technology to control GaN MOSFETs. During operation, the main heat-generating components are the GaN MOSFETs, as fast chargers are increasingly focused on miniaturization. Heat dissipation is primarily achieved through PCB conduction, such as... Figure 1 As shown. In the traditional method, heat is conducted to the thermistor, which then changes its resistance upon sensing the heat. The thermistor is connected in series at the OTP pin of the switch control circuit chip, thereby altering the loop current and voltage parameters. These changes in current and voltage parameters cause changes in the control logic of the switch control chip, resulting in corresponding control commands to control the MOS-FETs. Traditional circuitry suffers from a delay due to the time required for heat conduction. Furthermore, the limitations of PCB thermal conductivity in traditional circuitry can lead to less precise control. Utility Model Content

[0003] The purpose of this invention is to provide a gallium nitride (GaN) fast charger that solves the problem in the prior art where the temperature of the heating element is monitored by a thermistor, and the monitoring accuracy of the thermistor is affected by the difference in thermal conductivity of the PCB, thus affecting the control precision.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A gallium nitride (GaN) fast charger includes a housing with a working cavity inside. The working cavity contains an input circuit, a switch control circuit, a transformer output circuit, and a protocol output circuit, all electrically connected in sequence. The housing has a plug for connecting to the input circuit and a socket for connecting to the protocol output circuit. The switch control circuit includes a switch control chip, a GaN power switch, and a temperature sensor. One end of the GaN power switch is connected to the input circuit, and the other end is connected to the transformer output circuit. The switch control chip is connected to the GaN power switch and controls its power regulation. The temperature sensor is installed at the location of the GaN power switch to detect the temperature at that location. The temperature sensor is electrically connected to the switch control chip.

[0006] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0007] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0008] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0009] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0010] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0011] Further, the shell is internally provided with a plug cavity, and the surface of the shell is provided with two sliding-out holes communicating with the plug cavity; the plug comprises two metal sheets and a connecting rod, the two metal sheets are arranged in parallel, and the two metal sheets are respectively aligned with the two sliding-out holes, the connecting rod is between the two metal sheets, and the two ends of the connecting rod are respectively connected with the two metal sheets; the shell is provided with a first long hole communicating with the plug cavity on the side adjacent to the sliding-out hole, and a push bar is slidingly arranged in the first long hole, one end of the push bar is connected with a pushing block on the surface of the shell, and the other end of the push bar is connected with the connecting rod in the plug cavity.

[0012] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1, through setting up temperature sensor, can pass through temperature sensor directly with the temperature of gallium nitride power switch position transmission to switch control chip, and this temperature monitoring mode compares with traditional thermistor monitoring mode, and monitoring is more accurate, and reaction is faster, when the temperature of gallium nitride power switch exceeds critical value, can pass through switch control chip to adjust the power of gallium nitride power switch, thereby avoiding gallium nitride power switch to continue to heat, and leading to the emergence of charger failure. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a gallium nitride rapid charging circuit framework schematic diagram in the prior art.

[0014] Figure 2The utility model relates to a kind of charging circuit frame schematic diagram of gallium nitride quick charger.

[0015] Figure 3 The utility model relates to a kind of whole schematic diagram of gallium nitride quick charger.

[0016] Figure 4 The utility model relates to a kind of side view of gallium nitride quick charger.

[0017] Figure 5 The utility model relates to a kind of side profile schematic diagram of gallium nitride quick charger.

[0018] Figure 6 The utility model relates to a kind of plug schematic diagram of gallium nitride quick charger.

[0019] Icon: 1-shell, 2-working cavity, 3-plug, 4-plug cavity, 5-sliding hole, 6-metal sheet, 7-connecting rod, 8-first long hole, 9-dial bar, 10-push block, 11-contact cavity, 12-contact bar, 13-second long hole, 14-connecting strip, 15-contact block, 16-elastic sheet, 17-radiating hole, 18-heat conduction strip. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following is combined with the drawings and examples, and the utility model is further described in detail.It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0021] Figures 2 to 6 As shown in the utility model embodiment.

[0022] Example 1:

[0023] As Figure 2 , 3 As shown in a kind of gallium nitride quick charger, including shell 1, working cavity 2 is provided in shell 1, input loop, switch control loop, transformer output loop and protocol output loop are sequentially arranged in working cavity 2, plug is provided on shell 1 and is connected with input loop, and plug-in 3 is connected with protocol output loop, switch control loop includes switch control chip, gallium nitride power switch and temperature sensor, one end of gallium nitride power switch is connected with input loop, the other end is connected with transformer output loop, the switch control chip is connected with the gallium nitride power switch, for controlling the power regulation of gallium nitride power switch, the temperature sensor is installed in the position of the gallium nitride power switch, for detecting the temperature at the position of gallium nitride power switch, the temperature sensor and the switch control chip are electrically connected.

[0024] By setting the temperature sensor, the temperature of the gallium nitride power switch position can be directly transmitted to the switch control chip through the temperature sensor. Compared with the traditional thermistor monitoring method, the monitoring is more accurate and faster. When the temperature of the gallium nitride power switch exceeds the critical value, the power of the gallium nitride power switch can be adjusted through the switch control chip, so as to avoid the gallium nitride power switch from continuing to heat up and causing the charger to malfunction.

[0025] The temperature sensor is an infrared temperature sensor.

[0026] Embodiment 2:

[0027] On the basis of embodiment 1, as shown in Figures 4-6 The shell 1 is further provided with a plug cavity 4, and the surface of the shell 1 is provided with two sliding holes 5 which are in communication with the plug cavity 4; the plug comprises two metal sheets 6 and a connecting rod 7, the two metal sheets 6 are arranged in parallel, and the two metal sheets 6 are respectively aligned with the two sliding holes 5, the connecting rod 7 is between the two metal sheets 6, and the two ends of the connecting rod 7 are respectively connected with the two metal sheets 6; the shell 1 is provided with a first long hole 8 which is in communication with the plug cavity 4 on the side adjacent to the sliding hole 5, and a push bar 9 is slidably arranged in the first long hole 8, one end of the push bar 9 is connected with a pushing block 10 on the surface of the shell 1, and the other end is connected with the connecting rod 7 in the plug cavity 4. By setting the plug cavity 4, the metal sheets 6 can be pushed out of the sliding holes 5 when the charger is needed, so that the two metal sheets 6 can be connected with the external power supply. When the charger is not needed, the metal sheets 6 can be retracted into the plug cavity 4 by the pushing block 10, so that the metal sheets 6 of the charger do not scratch the bag used for storage. By setting the connecting rod 7, the two metal sheets 6 can be simultaneously extended or retracted into the plug cavity 4 when the pushing block 10 is pushed.

[0028] The shell 1 is provided with a contact cavity 11 between the plug cavity 4 and the working cavity 2, and a contact bar 12 is arranged in the contact cavity 11, the contact bar 12 is connected with the input circuit, and the contact bar 12 is provided in two; the plug cavity 4 and the contact cavity 11 are connected through two second long holes 13, and a connecting bar 14 is slidably arranged in each of the two second long holes 13, one end of the connecting bar 14 is connected with the metal sheet 6, and the other end is connected with the contact bar 12. By setting the contact cavity 11 and the contact bar 12, the metal sheet 6 can be connected with the input circuit through the contact bar 12, so that the metal sheet 6 can be connected with the input circuit when it is pushed out or retracted into the plug cavity 4, and the connection is not exposed to the outside to avoid accidental touch.

[0029] The connecting bar 14 is connected with the contact bar 12 through a contact block 15, one end of the contact block 15 is connected with the connecting bar 14, and the other end is connected with the contact bar 12.

[0030] The contact block 15 is provided with an elastic sheet 16 at one end of the contact block 15, and the elastic sheet 16 is in contact with the contact strip 12. By providing the contact block 15, the contact block 15 can be better connected with the contact strip 12, and the elastic sheet can be kept in contact with the contact strip 12 at any time by clamping the contact block 15 in the contact cavity 11. The connecting strip 14, the contact block 15 and the elastic sheet 16 are all made of conductive material, so that the external power supply can be connected to the input circuit.

[0031] The plug cavity 4 and the working cavity 2 are connected through the heat dissipation hole 17, and the heat dissipation hole 17 is arranged on the cavity wall of the plug cavity 4 away from the sliding hole 5. By providing the heat dissipation hole 17, the working cavity 2 and the outside can have a certain air flow during the charging process of the charger through the heat dissipation hole 17, and the air enters and exits the working cavity 2 through the first long hole 8 and the heat dissipation hole 17, so that heat dissipation is achieved by air flow, avoiding the temperature in the working cavity 2 from rising too fast, so that the charger can be in a high-efficiency charging state, thereby improving the charging efficiency.

[0032] The heat dissipation hole 17 is slidably provided with a heat conduction strip 18, one end of the heat conduction strip 18 is arranged in the working cavity 2, and the other end is connected to the end of the metal sheet 6 away from the sliding hole 5 in the plug cavity 4, and the heat conduction strip 18 and the metal sheet 6 are connected through the insulating block. By providing the heat conduction strip 18, the temperature in the working cavity 2 can be further absorbed by the heat conduction strip 18, and then the heat can be brought into the plug cavity 4 by the heat conduction strip 18, and heat dissipation is achieved through the first long hole 8.

[0033] Although the utility model has been described herein with reference to a number of explanatory embodiments of the utility model, it should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope and spirit of the disclosure. More specifically, various modifications and improvements can be made to the constituent components and / or layout of the subject combination layout within the scope of the disclosure, drawings and claims. In addition to the modifications and improvements to the constituent components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A gallium nitride fast charger, comprising a shell (1), a working cavity (2) is arranged in the shell (1), an input circuit, a switch control circuit, a transformer output circuit and a protocol output circuit are sequentially and electrically connected in the working cavity (2), a plug connected with the input circuit is arranged on the shell (1), and a socket (3) connected with the protocol output circuit is arranged on the shell (1), characterized in that, The switch control circuit comprises a switch control chip, a gallium nitride power switch and a temperature sensor, one end of the gallium nitride power switch is connected with the input circuit, the other end is connected with the transformer output circuit, the switch control chip is connected with the gallium nitride power switch and is used for controlling the power adjustment of the gallium nitride power switch, the temperature sensor is installed at the position of the gallium nitride power switch and is used for detecting the temperature at the position of the gallium nitride power switch, and the temperature sensor is electrically connected with the switch control chip.

2. The gallium nitride fast charger of claim 1, wherein: The shell (1) is further provided with a plug cavity (4), and the surface of the shell (1) is provided with two sliding holes (5) which are communicated with the plug cavity (4); The plug comprises two metal sheets (6) and a connecting rod (7), the two metal sheets (6) are arranged in parallel, and the two metal sheets (6) are aligned with the two sliding holes (5) respectively, the connecting rod (7) is between the two metal sheets (6), and the two ends of the connecting rod (7) are connected with the two metal sheets (6) respectively; The shell (1) is provided with a first long hole (8) which is communicated with the plug cavity (4) on the side adjacent to the sliding hole (5), a sliding knob (9) is arranged in the first long hole (8), one end of the sliding knob (9) is connected with a pushing block (10) on the surface of the shell (1), and the other end of the sliding knob (9) is connected with the connecting rod (7) in the plug cavity (4).

3. A gallium nitride fast charger according to claim 2, wherein: The shell (1) is provided with a contact cavity (11) between the plug cavity (4) and the working cavity (2), and a contact strip (12) is arranged in the contact cavity (11), the contact strip (12) is connected with the input circuit, and the contact strip (12) is provided in two pieces; The plug cavity (4) and the contact cavity (11) are communicated through two second long holes (13), and a connecting strip (14) is arranged in each of the two second long holes (13), one end of the connecting strip (14) is connected with the metal sheet (6), and the other end of the connecting strip (14) is connected with the top of the contact strip (12).

4. The gallium nitride fast charger of claim 3, wherein: The connecting strip (14) is connected with the top of the contact strip (12) through a contact block (15), one end of the contact block (15) is connected with the connecting strip (14), and the other end of the contact block (15) is connected with the top of the connecting strip (14).

5. A gallium nitride fast charger according to claim 4, wherein: One end of the contact block (15) is provided with an elastic sheet (16) which is arranged towards the contact strip (12), and the elastic sheet (16) is in close contact with the top of the contact strip (12).

6. The gallium nitride fast charger of claim 2, wherein: The plug cavity (4) and the working cavity (2) are communicated through a heat dissipation hole (17), and the heat dissipation hole (17) is arranged on the cavity wall of the plug cavity (4) away from the sliding hole (5).

7. A gallium nitride fast charger according to claim 6, wherein: A heat conduction strip (18) is arranged in the heat dissipation hole (17), one end of the heat conduction strip (18) is arranged in the working cavity (2), the other end of the heat conduction strip (18) is connected with one end of the metal sheet (6) away from the sliding hole (5) in the plug cavity (4), and the heat conduction strip (18) and the metal sheet (6) are connected through an insulating block.

Images