Split filter based on AC charging pile CP signal processing

Abstract

The utility model discloses a split filter based on AC charging pile CP signal processing, which belongs to the technical field of new energy electric automobiles, and comprises a charging pile and a filter, the filter is connected with an automobile, and the charging pile is connected with the filter; the filter comprises a first split filter and a second split filter, the first split filter is located outside the automobile darkroom, the second split filter is located in the automobile darkroom, the first split filter and the second split filter are connected through the waveguide tube on the darkroom wall, and the first split filter, the second split filter and the automobile darkroom are in common ground. The first split filter is connected with the charging pile, and the second split filter is connected with the automobile. Through the mode, the split filter with a split structure is adopted, signals are transmitted into the automobile electronic darkroom by utilizing a photoelectric conversion principle, and the transmission problem of CP signals in the automobile electronic darkroom is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of new energy electric vehicle technology, specifically to a split filter based on AC charging pile CP signal processing. Background Technology

[0002] With the popularization of new energy vehicles, car charging technology is booming. Among the AC charging technologies currently on the market, the demand for testing of car and charging pile charging in automotive electronic anechoic chambers is increasing, and conventional filters cannot meet the requirements for signal transmission.

[0003] For example, Chinese patent CN211579601U discloses a filter used in new energy vehicle charging piles, which relates to the field of PCB board filters and PCB board technology. It includes a multilayer PCB board and a filter body. The outer side of the multilayer PCB board is fixedly connected to an installation mechanism. The installation mechanism includes a support base and an installation box. The side of the support base near the multilayer PCB board is fixedly connected to the bottom surface of the multilayer PCB board. The upper surface of the support base abuts against the bottom surface of the filter body. The side of the installation box near the multilayer PCB board is fixedly connected to the upper surface of the multilayer PCB board.

[0004] However, the CP signal in the automotive electronic anechoic chamber is transmitted in the form of a PWM square wave. When the PWM square wave passes through the signal filter of the above-mentioned technology, it is very easy to be distorted, or even the signal cannot be transmitted.

[0005] Based on this, this utility model designs a split filter based on AC charging pile CP signal processing to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a split filter based on AC charging pile CP signal processing.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A split-type filter based on AC charging pile CP signal processing includes a charging pile, which includes seven interfaces, namely L1, L2, L3, N, PE, CC, and CP.

[0009] L1, L2, L3, and N are all power interfaces, PE is a ground interface; CC is a charging connection confirmation signal interface, and CP is a control guidance signal interface.

[0010] It also includes a filter, which is connected to the vehicle, and the charging pile is connected to the filter;

[0011] The filter includes a split filter one and a split filter two. The split filter one is located outside the car's anechoic chamber, and the split filter two is located inside the car's anechoic chamber. The split filter one and the split filter two are connected by optical fiber through waveguides on the walls of the anechoic chamber. The split filter one and the split filter two share a common ground with the car's anechoic chamber.

[0012] The first split filter is fixedly installed inside the first outer casing, and the second split filter is fixedly installed inside the second outer casing.

[0013] Both outer casing one and outer casing two are connected to heat dissipation components;

[0014] Both outer cover one and outer cover two are provided with through holes for the inlet and outlet of external airflow;

[0015] The split filter is connected to the charging pile;

[0016] The second split filter is connected to the car.

[0017] Furthermore, the split filter includes a motherboard, an optical transceiver, and a power supply. The motherboard is electrically connected to the optical transceiver, and the optical transceiver is electrically connected to the power supply. The motherboard is also connected to the charging pile.

[0018] Furthermore, the power source and the charging pile share the same ground.

[0019] Furthermore, the motherboard includes an N1 interface, a P1 interface, and positive and negative interfaces on the left side.

[0020] The optical transceiver includes a PE1 interface, a P3 interface, an N3 interface, and positive and negative interfaces on the left and right sides. The positive and negative interfaces on the left side of the motherboard are electrically connected to the positive and negative interfaces on the left side of the optical transceiver, respectively. The N3 interface is electrically connected to the N1 interface. The P1 interface is connected to the split filter 2. The P3 interface is electrically connected to the AC charging pile. The positive and negative terminals of the power supply are electrically connected to the positive and negative interfaces on the right side of the optical transceiver through through-core capacitors C3 and C4, respectively.

[0021] Furthermore, the P1 interface is connected to the split filter two.

[0022] Furthermore, the split filter 2 internally includes a motherboard 2, an optical transceiver 2, and a power supply 2. The motherboard 2 is electrically connected to the optical transceiver 2, the optical transceiver 2 is electrically connected to the power supply 2, and the motherboard 2 is electrically connected to the vehicle. The motherboard 2 is connected to the P1 interface via optical fiber.

[0023] Furthermore, the second power source shares a ground with the vehicle.

[0024] Furthermore, the second motherboard includes an N2 interface, a P2 interface, and positive and negative interfaces on the right side;

[0025] The optical transceiver includes a PE2 interface, a P4 interface, an N4 interface, positive and negative interfaces on the right side, and positive and negative interfaces on the bottom side.

[0026] The N2 interface is electrically connected to the N4 interface, the P2 interface is electrically connected to the P1 interface, the positive and negative interfaces on the right side of the motherboard are electrically connected to the positive and negative interfaces on the upper right side of the optical transceiver, respectively, the positive and negative terminals of the power supply are electrically connected to the positive and negative interfaces on the lower side of the optical transceiver through capacitors C1 and C2, respectively, and the P4 interface is electrically connected to the vehicle through inductor L.

[0027] Furthermore, both the PE1 and PE2 interfaces are grounded, and both the PE1 and PE2 interfaces share a common ground.

[0028] Furthermore, the heat dissipation assembly includes a water pump, a guide pipe, a return pipe, a first fan, a second fan, and a cooling box. The water pump and the cooling box are both fixedly installed on the outside of the first outer cover. The guide pipe is fixedly installed on the inner top of the first and second outer covers. One end of the guide pipe is fixedly connected to and communicates with the water supply end of the cooling box, and the other end of the guide pipe is fixedly connected to and communicates with one end of the return pipe. The other end of the return pipe is fixedly connected to and communicates with the water inlet end of the water pump, and the water outlet end of the water pump is fixedly connected to and communicates with the water inlet end of the cooling box.

[0029] Compared with the prior art, the advantages of this utility model are as follows: 1. This utility model adopts a split filter with a split structure, which uses the photoelectric conversion principle to transmit signals to the automotive electronic anechoic chamber, effectively solving the problem of CP signal transmission in the automotive electronic anechoic chamber.

[0030] 2. The split filter used in this application effectively reduces the problem of high background noise during automotive electronic anechoic chamber testing and reduces mutual electromagnetic interference within the filter.

[0031] 3. This utility model uses a cooling box, a guide pipe, a return pipe, and two fans to dissipate heat from the split filter one and the split filter two, preventing the heat from the split filter one and the split filter two from being too high and affecting their performance. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This invention relates to a connection structure for a split-type filter based on AC charging pile CP signal processing. Figure 1 ;

[0034] Figure 2 This invention relates to a connection structure for a split-type filter based on AC charging pile CP signal processing. Figure 2 ;

[0035] Figure 3 This invention relates to a connection structure for a split-type filter based on AC charging pile CP signal processing. Figure 3 ;

[0036] Figure 4 This is a connection structure diagram of the heat dissipation component of this utility model;

[0037] Figure 5 This is a schematic diagram of the charging pile interface of this utility model.

[0038] The numbers in the figure represent:

[0039] 1. Split Filter I; 11. Mainboard I; 12. Optical Transceiver I; 13. Power Supply I; 2. Split Filter II; 21. Mainboard II; 22. Optical Transceiver II; 23. Power Supply II; 3. Heat Dissipation Components; 31. Water Pump; 32. Flow Guide Pipe; 33. Return Pipe; 34. First Fan; 35. Second Fan; 36. Refrigeration Box; 4. Outer Housing I; 5. Outer Housing II. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0041] Example 1: In some embodiments, please refer to the accompanying drawings. Figure 1-Figure 5 A split-type filter based on AC charging pile CP signal processing includes a charging pile, the charging pile including seven interfaces, the seven interfaces being L1, L2, L3, N, PE, CC, and CP;

[0042] L1, L2, L3, and N are all power interfaces, PE is a ground interface; CC is a charging connection confirmation signal interface, and CP is a control guidance signal interface.

[0043] In the automotive electronic anechoic chamber, L1, L2, L3, and N are processed using a three-phase four-wire power supply filter; PE does not require processing and is directly grounded; the CC interface is processed using a signal filter; and the CP output is a PWM wave.

[0044] The basic principle of Pulse Width Modulation (PWM) is as follows: The control method involves controlling the on / off state of the switching devices in the inverter circuit to obtain a series of pulses with equal amplitude at the output. These pulses replace the sine wave or the desired waveform. In other words, multiple pulses are generated within half a cycle of the output waveform, ensuring that the equivalent voltage of each pulse is a sine wave, resulting in a smooth output with fewer low-order harmonics. By modulating the width of each pulse according to certain rules, the magnitude of the inverter circuit's output voltage and the output frequency can be changed.

[0045] It also includes a filter, which is connected to the vehicle, and the charging pile is connected to the filter;

[0046] The filter includes a split filter 1 and a split filter 2. The split filter 1 is located outside the car's anechoic chamber, and the split filter 2 is located inside the car's anechoic chamber. The split filter 1 and the split filter 2 are connected by optical fiber through waveguides on the walls of the anechoic chamber. The split filter 1, the split filter 2 and the car's anechoic chamber share a common ground.

[0047] Due to the use of a split structure, split filter 1 and split filter 2 need to be electromagnetically shielded separately to prevent their own interference from being transmitted to other devices.

[0048] The split filter 1 is fixedly installed inside the outer casing 4, and the split filter 2 is fixedly installed inside the outer casing 5.

[0049] Both the outer cover 4 and the outer cover 5 are connected to heat dissipation components 3;

[0050] Both outer cover 4 and outer cover 5 are provided with through holes for the inlet and outlet of external airflow.

[0051] The split filter 1 is connected to the charging pile;

[0052] The split filter 2 is connected to the car.

[0053] The split filter 1 includes a motherboard 11, an optical transceiver 12, and a power supply 13. The motherboard 11 is electrically connected to the optical transceiver 12, and the optical transceiver 12 is electrically connected to the power supply 13. The motherboard 11 is connected to a charging pile. The power supply 13 converts the AC power input into a 12VDC voltage to power the optical transceiver 12. The optical transceiver 12 converts the input 12VDC voltage into a 5VDC voltage to power the motherboard 11.

[0054] The power supply 13 shares a ground with the charging pile.

[0055] The motherboard 11 includes an N1 interface, a P1 interface, and positive and negative interfaces on the left side;

[0056] The optical transceiver 12 includes a PE1 interface, a P3 interface, an N3 interface, and positive and negative interfaces on the left and right sides. The positive and negative interfaces on the left side of the motherboard 11 are electrically connected to the positive and negative interfaces on the left side of the optical transceiver 12, respectively. The N3 interface is electrically connected to the N1 interface, the P1 interface is connected to the split filter 2, and the P3 interface is electrically connected to the AC charging pile. The positive and negative terminals of the power supply 13 are electrically connected to the positive and negative interfaces on the right side of the optical transceiver 12 through through-core capacitors C3 and C4, respectively. When supplying power to the optical transceiver 12, through-core capacitors C3 and C4 are provided to prevent interference signals from affecting the motherboard 11 and the optical transceiver 12. Through-core capacitors C3 and C4 can effectively filter out interference signals when power is input, so that the optical transceiver 12 receives clean power.

[0057] To prevent interference signals from affecting the motherboard 11 and optical transceiver 12, the motherboard 11 and optical transceiver 12 need to be shielded, that is, the motherboard 11 and optical transceiver 12 are placed in an electromagnetically sealed housing.

[0058] The P1 interface is connected to the split filter 2.

[0059] When the CP signal is input to the optical transceiver 12, it is transmitted to the N1 interface of the motherboard 11 through the N3 interface. At this time, the optical transceiver 12 converts the PWM wave into a 485 signal, which is then received by the motherboard 11.

[0060] The split filter 2 internally includes a motherboard 21, an optical transceiver 22, and a power supply 23. The motherboard 21 is electrically connected to the optical transceiver 22, the optical transceiver 22 is electrically connected to the power supply 23, and the motherboard 21 is electrically connected to the vehicle. The motherboard 21 is connected to the P1 interface via optical fiber. The power supply 23 converts the AC input into a 12VDC voltage to power the optical transceiver 22, which then converts the input 12VDC voltage into a 5VDC voltage to power the motherboard 21.

[0061] The power supply 23 shares a ground with the vehicle.

[0062] The motherboard 21 includes an N2 interface, a P2 interface, and positive and negative interfaces on the right side;

[0063] The optical transceiver 22 includes a PE2 interface, a P4 interface, an N4 interface, positive and negative interfaces on the right side, and positive and negative interfaces on the bottom side.

[0064] The N2 interface is electrically connected to the N4 interface, and the P2 interface is electrically connected to the P1 interface. The positive and negative interfaces on the right side of the motherboard 21 are electrically connected to the positive and negative interfaces on the upper right side of the optical transceiver 22, respectively. The positive and negative interfaces on the lower right side of the optical transceiver 22 are electrically connected to the positive and negative terminals of the power supply 23, respectively. The P4 interface is electrically connected to the car through an inductor L. The function of the inductor L is to filter out some mega-level interference signals.

[0065] The positive and negative terminals of the power supply 23 are electrically connected to the positive and negative interfaces on the lower side of the optical transceiver 22 through through-core capacitors C1 and C2, respectively.

[0066] When supplying power to optical transceiver 22, to prevent interference signals from affecting motherboard 21 and optical transceiver 22, the input power of power supply 23 needs to be shielded. Through-core capacitors C1 and C2 can effectively filter out interference signals during power input, ensuring a clean power supply for optical transceiver 22. Motherboard 21 and optical transceiver 22 require shielding, meaning they are placed inside an electromagnetically sealed housing.

[0067] Both PE1 and PE2 interfaces are grounded, and they share a common ground.

[0068] Both optical transceiver 12 and optical transceiver 22 adopt existing mature technologies, namely 485 communication optical transceivers.

[0069] Both power supply 13 and power supply 23 adopt existing mature technologies, namely AC / DC power supplies.

[0070] The power supply 13 and power supply 23 convert the mains input into a 12VDC voltage, which supplies power to optical transceiver 12 and optical transceiver 22 respectively.

[0071] When the CP signal of the charging pile is input to optical transceiver 12, it is transmitted to the N1 interface of motherboard 11 through the N3 interface. At this time, the function of optical transceiver 12 is to convert the PWM wave into a 485 signal. Motherboard 11 transmits the received 485 signal to the P2 interface of motherboard 21 through the P1 interface. Motherboard 21 converts the received optical fiber signal into a 485 signal and transmits it to the N4 interface of optical transceiver 22 through the N2 interface. Optical transceiver 22 converts the received 485 signal into a PWM signal and outputs it through the P4 interface.

[0072] This utility model employs a split-type filter with a split structure, which uses the photoelectric conversion principle to transmit signals to the automotive electronic anechoic chamber, effectively solving the problem of CP signal transmission in the automotive electronic anechoic chamber.

[0073] Example 2: In some embodiments, such as Figure 4As shown, in a preferred embodiment of this utility model, the heat dissipation component 3 includes a water pump 31, a guide pipe 32, a return pipe 33, a first fan 34, a second fan 35, and a cooling box 36. The water pump 31 and the cooling box 36 are both fixedly installed on the outside of the outer cover 4. The guide pipe 32 is fixedly installed on the inner top of the outer cover 4 and the outer cover 5. One end of the guide pipe 32 is fixedly connected to and communicates with the water supply end of the cooling box 36, and the other end of the guide pipe 32 is fixedly connected to and communicates with one end of the return pipe 33. The other end of the return pipe 33 is fixedly connected to and communicates with the water inlet end of the water pump 31, and the water outlet end of the water pump 31 is fixedly connected to and communicates with the water inlet end of the cooling box 36.

[0074] When the split filter 1 and split filter 2 generate heat during normal operation, the water pump 31 starts, causing the cooling box 36 to pass cold water into the guide pipe 32 to cool the guide pipe 32. The first fan 34 and the second fan 35 both start, drawing outside air into the outer casing 4 and outer casing 5. The outside air is cooled as it passes through the guide pipe 32, and the cooled air blows onto the split filter 1 and split filter 2 to further cool them. Under the action of the water pump 31, the cold water passes through the guide pipe 32 and enters the return pipe 33 to return to the cooling box 36 for cooling, thus realizing the recycling of cooling water.

[0075] Example 3: In some embodiments, such as Figure 3 As shown, in a preferred embodiment of this utility model, during use, after the car plugs in the gun, the main board 21 detects the vehicle connection status; the main board 21 sends the status data to the optical transceiver 22, the optical transceiver 22 uploads the data to the optical transceiver 12 via optical fiber, and the optical transceiver 12 then uploads the data to the main board 11.

[0076] Optical transceiver 22 converts digital signals into optical signals using an encoder, and then transmits them to optical transceiver 12 via optical fiber. Optical transceiver 12 receives the data and converts the optical signals back into digital signals using a decoder, which are then processed by motherboard 11. Similarly, the process of sending signals from motherboard 11 to motherboard 21 is the same.

[0077] The main board 11 receives the vehicle connection status data and then modifies the CP signal at the charging pile to inform the charging pile that the vehicle is now connected and that it is not in a charging state.

[0078] When the charging station detects that the vehicle is connected, it generates a corresponding PWM signal on the CP according to the preset power output level.

[0079] Motherboard 11 detects a PWM signal from the charging pile and performs pulse width and period detection on the PWM signal, while sending the detection signal to Motherboard 22.

[0080] Motherboard 21 receives the PWM signal and sends it to the vehicle.

[0081] After the vehicle detects the PWM, it changes the vehicle status to a charging-ready state and provides feedback through the PWM signal. Then, after the main board 21 detects this feedback signal, it immediately informs the main board 11, and the main board 11 feeds back the status to the charging pile CP.

[0082] Once the charging station detects this state, it turns on the power output switch to charge the vehicle. During the charging process, the above state remains unchanged.

[0083] When it's time to end charging, this requires analysis based on the charging station's factory settings:

[0084] If the charging station is a low-power plug-and-play type, then the status of the charging gun on the car side will be detected by motherboard 221.

[0085] If the charging pile is set to "key start / stop" regardless of its power output, then the power switch output and PWM signal output at the charging pile end will be turned off first. At this time, the motherboard 11 detects the status of the charging pile end and informs the motherboard 21. Only after the motherboard 21 turns off the PWM output can the charging truly end.

[0086] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A split-type filter based on AC charging pile CP signal processing, comprising a charging pile, characterized in that, It also includes a filter, which is connected to the vehicle, and the charging pile is connected to the filter; The filter includes a split filter one (1) and a split filter two (2). The split filter one (1) is located outside the car's darkroom, and the split filter two (2) is located inside the car's darkroom. The split filter one (1) and the split filter two (2) are connected by optical fiber through waveguides on the walls of the darkroom. The split filter one (1) and the split filter two (2) share the same ground with the car's darkroom. The split filter one (1) is fixedly installed inside the outer casing one (4), and the split filter two (2) is fixedly installed inside the outer casing two (5); Both outer cover one (4) and outer cover two (5) are connected to heat dissipation components (3); Both the outer cover one (4) and the outer cover two (5) are provided with through holes for the inlet and outlet of external airflow; The split filter (1) is connected to the charging pile; The split filter 2 (2) is connected to the car.

2. The split-type filter based on AC charging pile CP signal processing according to claim 1, characterized in that, The split filter 1 (1) includes a motherboard 1 (11), an optical transceiver 1 (12) and a power supply 1 (13). The motherboard 1 (11) is electrically connected to the optical transceiver 1 (12), and the optical transceiver 1 (12) is electrically connected to the power supply 1 (13). The motherboard 1 (11) is connected to the charging pile.

3. The split-type filter based on AC charging pile CP signal processing according to claim 2, characterized in that, The power source (13) shares a ground with the charging pile.

4. The split-type filter based on AC charging pile CP signal processing according to claim 3, characterized in that, The motherboard (11) includes an N1 interface, a P1 interface, and positive and negative interfaces on the left side; The optical transceiver (12) includes a PE1 interface, a P3 interface, an N3 interface, and positive and negative interfaces on the left and right sides. The positive and negative interfaces on the left side of the motherboard (11) are electrically connected to the positive and negative interfaces on the left side of the optical transceiver (12), respectively. The N3 interface is electrically connected to the N1 interface, the P1 interface is connected to the split filter (2), and the P3 interface is electrically connected to the AC charging pile. The positive and negative terminals of the power supply (13) are electrically connected to the positive and negative interfaces on the right side of the optical transceiver (12) through the through-core capacitor C3 and the through-core capacitor C4, respectively.

5. The split-type filter based on AC charging pile CP signal processing according to claim 4, characterized in that, The P1 interface is connected to the split filter two (2).

6. The split-type filter based on AC charging pile CP signal processing according to claim 5, characterized in that, The split filter 2 (2) includes a motherboard 2 (21), an optical transceiver 2 (22) and a power supply 2 (23). The motherboard 2 (21) is electrically connected to the optical transceiver 2 (22), the optical transceiver 2 (22) is electrically connected to the power supply 2 (23), and the motherboard 2 (21) is electrically connected to the car. The motherboard 2 (21) is connected to the P1 interface via optical fiber.

7. The split-type filter based on AC charging pile CP signal processing according to claim 6, characterized in that, The second power source (23) shares a ground with the vehicle.

8. The split-type filter based on AC charging pile CP signal processing according to claim 7, characterized in that, The motherboard 2 (21) includes an N2 interface, a P2 interface and positive and negative interfaces on the right side; The optical transceiver 2 (22) includes a PE2 interface, a P4 interface, an N4 interface, positive and negative interfaces on the right side and positive and negative interfaces on the bottom side; The N2 interface is electrically connected to the N4 interface, the P2 interface is electrically connected to the P1 interface, the positive and negative interfaces on the right side of the motherboard two (21) are electrically connected to the positive and negative interfaces on the upper right side of the optical transceiver two (22), the positive and negative terminals of the power supply two (23) are electrically connected to the positive and negative interfaces on the lower side of the optical transceiver two (22) through the through-core capacitor C1 and the through-core capacitor C2, respectively, and the P4 interface is electrically connected to the car through the inductor L.

9. The split-type filter based on AC charging pile CP signal processing according to claim 8, characterized in that, Both PE1 and PE2 interfaces are grounded, and both PE1 and PE2 interfaces share a common ground.

10. The split-type filter based on AC charging pile CP signal processing according to claim 9, characterized in that, The heat dissipation assembly (3) includes a water pump (31), a guide pipe (32), a return pipe (33), a first fan (34), a second fan (35), and a cooling box (36). The water pump (31) and the cooling box (36) are fixedly installed on the outside of the outer cover (4). The guide pipe (32) is fixedly installed on the inner top of the outer cover (4) and the outer cover (5). One end of the guide pipe (32) is fixedly connected to the water supply end of the cooling box (36) and communicates with it. The other end of the guide pipe (32) is fixedly connected to one end of the return pipe (33) and communicates with it. The other end of the return pipe (33) is fixedly connected to the water inlet end of the water pump (31) and communicates with it. The water outlet end of the water pump (31) is fixedly connected to the water inlet end of the cooling box (36) and communicates with it.

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