CN112117816A - A charging adapter - Google Patents

Abstract

The invention relates to a charging transfer device. The charging switching device includes: an AC input integrated circuit board connected to an AC power source, two voltage-current conversion modules connected to the AC input integrated circuit board, an output integrated circuit board connected to the voltage-current conversion module, and a package The AC input integrated circuit board, the voltage-current conversion module and the housing of the output integrated circuit board; wherein, the AC input integrated circuit board includes two AC power output ports, each of the AC power output ports and the voltage The current conversion module is connected, and the output integrated circuit board includes a DC output port; between the AC input integrated circuit board and the voltage-current conversion module, the voltage-current conversion module and the output integrated circuit board pass through the socket socket child connection. Through this case, the cost of the charging adapter is reduced.

Description

A charging adapter

technical field

The invention relates to the technical field of electrical equipment, in particular to a charging adapter.

Background technique

The existing 24V charger converts AC_220V/16A AC input into DC_24V/120A DC output through the AC to DC device. The input and output of the 24V charger are connected by a total of 25 electrical wiring harnesses, and 4 copper bars are set , for charging 24V lithium battery. The 24V charger uses bus copper bars and electrical wiring harnesses as input and output terminals. During the design and use process, 10 25mm ² power lines, 15 22AWG signal lines and 4 copper bars are used in a large number of wiring harnesses, which increases the number of sheet metal parts. The layout design makes the charger huge and bulky, which is inconvenient for customers to use; in terms of safety, in the long-term use process, the aging and falling off of the outer insulation layer of the wiring harness is extremely likely to cause a short circuit, resulting in safety hazards, and the equipment will fail if it is small. If it is too big, it will cause personal accidental injury; for production and assembly, it also increases the risk of installation errors and installation time. During the installation process, the wiring harness is very dense, which is easy to cause installation errors and missing installations during the installation process. Spending a lot of time on installation is not efficient for product production. For the above problems, in the prior art, wire bundles are bundled into bundles and wrapped with winding tubes, or hidden by wire grooves, or bundled with cable ties. The principle of bundling is the separation of strong and weak electricity.

However, although the prior art can solve the problem that it is difficult to distinguish the wire harnesses when there are too many wire harnesses, it cannot prevent the insulation layer of the wire harnesses from falling off due to aging, and cannot practically solve the problems of wrong installation and missing installation of wiring harnesses.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a charging adapter device for the above problems.

A charging switching device, comprising: an AC input integrated circuit board connected to an AC power supply, two voltage-current conversion modules connected to the AC input integrated circuit board, an output integrated circuit board connected to the voltage-current conversion module, and A casing for encapsulating the AC input integrated circuit board, the voltage-current conversion module and the output integrated circuit board; wherein the AC input integrated circuit board includes two AC power output ports, each of the AC power output ports and the The voltage-current conversion module is connected, and the output integrated circuit board includes a DC output port; between the AC input integrated circuit board and the voltage-current conversion module, the voltage-current conversion module and the output integrated circuit board are connected by plugging socket connection.

In one embodiment, the AC input integrated circuit board adopts the minimum theoretical value width of copper foil and the wiring method of slot isolation on the PCB board: wherein, the PCB board is a double-layer board, and the live wire is laid on the top layer of the PCB board, A neutral line is arranged on the bottom layer of the PCB board.

In one embodiment, the voltage-current conversion module is an MR241800 module, and the MR241800 module includes a power input connection port, an RS485 communication port and a low-voltage DC output port; wherein the power input connection port and the AC power output port port connection.

In one embodiment, the output integrated circuit board further includes an RS485 communication port and a low-voltage DC input port, the RS485 communication port of the output integrated circuit board is connected to the RS485 communication port of the MR241800 module, and the low-voltage DC input The port is connected with the low-voltage direct current output port.

In one embodiment, the output integrated circuit board is made of FR-4 material, and copper foil is used for wiring on the PCB board, and the thickness of the copper foil is 2oZ.

In one embodiment, the copper foil is a copper bus bar, and two ends of the copper bus bar are covered with insulation reinforcement material.

In one embodiment, the output integrated circuit board further includes a CAN communication port.

In one embodiment, the output integrated circuit board further includes heat dissipation vias.

In one embodiment, the AC power source is a 220V/16A AC power source, and the voltage-current conversion module outputs a 24V/120A DC power.

The charging transfer device described in the above-mentioned embodiment adopts the integrated connection method of the circuit board as a whole, which saves the space occupied by the connecting harness and reduces the volume of the charging transfer device. Due to the method of fixing the positioning feet, if the wrong plug-in is inserted, it cannot be connected to the module, and the time for alignment and installation of wire harness marks is saved, so the problems of installation errors and excessive installation time are solved, and the charging performance is improved. The overall installation efficiency of the adapter.

Description of drawings

1 is a schematic diagram of an installation structure of a charging adapter in an embodiment;

2 is a schematic diagram of a circuit structure of a charging adapter in an embodiment;

FIG. 3 is a schematic structural diagram of an output integrated circuit board in an embodiment.

Detailed ways

In one of the embodiments, as shown in FIG. 1 , a charging adapter is provided, comprising: an AC input integrated circuit board 100 connected to an AC power supply, and two voltages connected to the AC input integrated circuit board 100 A current conversion module 200, an output integrated circuit board 300 connected to the voltage-to-current conversion module 200, and a casing 600 encapsulating the AC input integrated circuit board 100, the voltage-to-current conversion module 200 and the output integrated circuit board 300; wherein, the The AC input integrated circuit board 100 includes two AC power output ports, each of the AC power output ports is connected to the voltage-current conversion module 200, and the output integrated circuit board 300 includes a DC output port 500; the AC input integrated Between the circuit board 100 and the voltage-current conversion module 200, the voltage-current conversion module 200 and the output integrated circuit board 300 are connected through a socket.

Wherein, the AC power supply can be commercial power, the circuit current input integrated circuit board 100 is connected to the commercial power supply, and is output in two ways, as shown in FIG. The power output ports J2 and J3 are output, and the AC power output port includes a live wire interface N, a neutral wire interface L and a ground interface GND. The circuit flow input integrated circuit board 100 is connected to the AC power supply through the 16A AC plug 400, and the AC input cable is installed with a copper nose. For example, as shown in FIG. 2, the power input interface J1 of the circuit flow input integrated circuit board 100 includes a The live wire interface N, a neutral wire interface L and a ground interface GND are connected to the input cable through the copper nose.

The voltage and current conversion module is used for voltage and current conversion of the input electricity. For example, the input voltage and current conversion module has a voltage of 220V and a current of 16A, and the output voltage and current conversion module has a voltage of 24V and a current of 120A.

The output integrated circuit board 300 is connected to the voltage-current conversion module and then output to the charged device, for example, the charged device is a lithium battery. The DC output port 500 of the output integrated circuit board 300 and the DC output cable are installed with copper noses, and are connected to the charged device through the copper noses.

The casing 600 can be made of insulating material, and heat dissipation holes are provided in the casing to dissipate heat from the internal circuit.

The above-mentioned charging adapter device is connected through the integrated circuit board as a whole, which saves the space occupied by the connection harness and reduces the volume of the charging adapter device, and adopts the plug socket to connect through the plug-in method. The method of positioning the feet, if the wrong plug-in is inserted, it cannot be connected to the module, and the time for the alignment and installation of the wiring harness mark is saved, so the problems of installation errors and excessive installation time are solved, and the overall charging adapter device is improved. installation efficiency.

In one embodiment, the AC input integrated circuit board 100 adopts the minimum theoretical value width of copper foil and the wiring method of slot isolation on the PCB board: wherein, the PCB board is a double-layer board, and the live wire is laid on the top layer of the PCB board. , and route the zero line on the bottom layer of the PCB board. In this embodiment, the minimum theoretical width of the copper foil and the wiring method of slot isolation on the PCB board can be used to achieve the maximum electrical creepage distance and ensure the safety and reliability of the circuit board.

In one embodiment, as shown in FIG. 2 , the voltage-to-current conversion module 200 is an MR241800 module, and the MR241800 module includes a power input connection port, an RS485 communication port, and a low-voltage DC output port; wherein, the power input connection port The port is connected with the AC power output port. For example, as shown in Figure 2, the power input connection port of the MR241800 module includes a live wire interface N, a neutral wire interface L and a ground interface GND, which are connected to the live wire interface N, neutral wire interface L and ground interface GND of the AC power output port. Corresponding connection is used to connect electricity. The RS485 communication port includes two positive and negative power output terminals and two positive and negative 485 communication interfaces. The low-voltage DC output port is the converted DC output port, and the low-voltage DC output port is used to send the load Output low voltage.

The voltage-to-current conversion module 200 further includes heat dissipation holes 201 , and the heat-dissipation holes 201 are used to dissipate heat from the voltage-to-current conversion module 200 .

In one embodiment, as shown in FIG. 2 , the output integrated circuit board 300 further includes an RS485 communication port and a low-voltage DC input port, the RS485 communication port of the output integrated circuit board and the RS485 communication port of the MR241800 module connected, the low-voltage direct current input port is connected with the low-voltage direct current output port.

In one embodiment, the output integrated circuit board 300 is made of FR-4 material, and copper foil is used for wiring on the PCB board, and the thickness of the copper foil is 2oZ. Among them, oZ is the imperial measurement unit, called ounce in Chinese, and 2oZ is equal to 70 microns.

Wherein, as shown in FIG. 3 , the copper foil is a copper bus bar, and both ends of the copper bus bar are covered with insulation reinforcement materials. The main function of the output integrated circuit board is to integrate the wiring harness and pass large current, adopt the combination of the copper busbar and the PCB, and connect the copper busbar according to the designed model (the model is a tin-plated copper strip with a size of 7*149*1mm, tin-plated It can greatly reduce the virtual soldering situation during soldering) solder on the PCB board, adopt reflow soldering, and add insulation reinforcement materials at both ends of the bus copper bars to prevent the copper bars from being soldered and caused by defects such as long-term device aging. Falling off occurs to ensure safety and reliability. The circuit board also integrates CAN signals and balanced current lines, as well as external power supply ports. The design uses a lot of heat dissipation methods, adds vias, and opens windows and tin in special areas to increase the overcurrent capability and temperature rise. Experiments have shown that in the actual test, when the maximum over-continuous current is 120A, the maximum temperature rise is 32 degrees Celsius, and the temperature rise of the PCB board is only 10 degrees Celsius, reaching the IEC60065 safety standard <+85°C.

In one embodiment, the output integrated circuit board 300 further includes a CAN communication port J6. Among them, the CAN communication port J6 includes a positive and negative 485 interface, a 5V voltage interface, a ground interface, a positive and negative power supply interface, and a high and low level CAN interface. In this embodiment, the control of the output integrated circuit board 300 by the external circuit can be realized through the CAN communication port J6.

In one embodiment, the output integrated circuit board 300 further includes heat dissipation vias 307 . In this embodiment, the heat dissipation vias 307 can ensure rapid heat dissipation of the output integrated circuit board 300 under the condition of high current, thereby ensuring the safety of the circuit board.

In one embodiment, the AC power source is a 220V/16A AC power source, and the voltage-current conversion module outputs a 24V/120A DC power.

In a specific embodiment, as shown in FIG. 3 , the bus bar 304 of the output integrated circuit board 300 is welded on the PCB board 308; The low-voltage DC output port of 200 is connected; the CAN communication port J6 303 is the signal line output terminal, which can be used to collect the power supply of the output integrated circuit board 300; the DC output port 500 includes a positive output interface 306 and a negative initial interface 305; on the PCB board 308 A plurality of heat dissipation vias 307 are provided.

The charging transfer device described in the above embodiment connects the AC input integrated circuit board, the voltage-current conversion module and the output integrated circuit board through the circuit board integration method and the plug-in method. On the one hand, it can facilitate the installation of each component, and on the other hand On the one hand, the space occupied by the connection lines can be saved. Through the solution in the embodiment of the present application, 25 external wire harnesses are integrated into the circuit board, and 4 copper bars are also turned into 2 bus bars welded on the PCB board, thereby making All the space required for the placement of busbars and wire harnesses has been released, saving 3375cm ² of layout space, making the structure simple and the product compact and convenient; the integration of the busbars through the output integrated circuit board overcomes the long-term use of the electrical wiring harness. Insulation If the layer falls off, there will be no risk of short circuit due to aging of the electrical connecting lines inside the device; the output integrated circuit board adopts the methods of depositing copper on the upper and lower sides to flow through the vias, heat dissipation vias, and adding solder to increase the flow capacity, which can meet the PCB requirements. The board continues to have a high current of 120A; the AC input integrated circuit board adopts isolation to ensure the safety and reliability of the adapter board to meet the AC input. size; in the embodiment of the present application, the charging adapter device reduces the structure of the sheet metal parts and the identification required for the wiring harness, and reduces the cost of the device as a whole.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (9)

1. A charge transfer device, comprising: the device comprises an alternating current input integrated circuit board connected with an alternating current power supply, two voltage and current conversion modules connected with the alternating current input integrated circuit board, an output integrated circuit board connected with the voltage and current conversion modules, and a shell for packaging the alternating current input integrated circuit board, the voltage and current conversion modules and the output integrated circuit board;

the alternating current input integrated circuit board comprises two alternating current power supply output ports, each alternating current power supply output port is connected with the voltage-current conversion module, and the output integrated circuit board comprises a direct current output port; the alternating current input integrated circuit board is connected with the voltage and current conversion module, and the voltage and current conversion module is connected with the output integrated circuit board through the plug-in sockets.

2. The charging adapter device of claim 1, wherein the ac input ic board adopts a wiring manner of minimum theoretical width of copper foil and isolation in a slot of a PCB: the PCB is a double-layer board, a live wire is distributed on the top layer of the PCB, and a zero line is distributed on the bottom layer of the PCB.

3. The charging adapter device according to claim 1, wherein the voltage-current conversion module is an MR241800 module, and the MR241800 module includes a power input connection port, an RS485 communication port, and a low-voltage dc output port; and the power input connecting port is connected with the alternating current power output port.

4. The charging adapter device according to claim 3, wherein the output IC board further comprises an RS485 communication port and a low-voltage DC input port, the RS485 communication port of the output IC board is connected with the RS485 communication port of the MR241800 module, and the low-voltage DC input port is connected with the low-voltage DC output port.

5. The charging adapter of claim 1, wherein the output ic is FR-4, and a copper foil is used for the wiring of the PCB, and the thickness of the copper foil is 2 oZ.

6. The charging adapter according to claim 5, wherein the copper foil is a bus bar copper bar, and an insulating reinforcing material is coated at both end points of the bus bar copper bar.

7. The charge-transfer device of claim 1, wherein the output ic board further comprises a CAN communication port.

8. The charging hub device of any one of claims 1-7, wherein the output integrated circuit board further comprises a thermal dissipating via.

9. The charging adapter device of claim 1, wherein the ac power source is a 220V/16A ac power source, and the voltage-to-current conversion module outputs a 24V/120A dc power.

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