Hydrogen filling machine control device

Abstract

The utility model relates to the field of hydrogen filling machine control, in particular to a hydrogen filling machine control device. According to the scheme, the hydrogen filling machine control system comprises a hydrogen filling gun interface module, a hydrogen detection module and a control module, the hydrogen filling gun interface module achieves signal isolation and electrical isolation through an isolation transceiver U500, the hydrogen detection module achieves signal isolation and electrical isolation through an isolation amplifier U902 and a photoelectric coupler, and the safety of hydrogen filling machine control is greatly improved. The device is suitable for the hydrogen filling machine, signal isolation and electrical isolation are achieved through the isolation transceiver, the hydrogen detection module is additionally arranged, the isolation amplifier and the photoelectric coupler are adopted in the hydrogen detection module, signal isolation and electrical isolation are achieved, and the use safety of the hydrogen filling machine is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen filling machine control, and particularly relates to a hydrogen filling machine control device. Background Art

[0002] With the continuous growth of the global demand for clean energy, hydrogen energy, as an efficient and environmentally friendly energy form, is receiving increasing attention. As an important supporting facility for hydrogen energy applications, the performance of the control device of the hydrogen filling machine directly affects the efficiency and safety of hydrogen filling. However, there are still some problems in the existing hydrogen filling machine control devices, such as low control accuracy, lack of hydrogen detection circuit, lack of signal isolation ability of the device, complex operation, etc. These problems limit the safe use and wide application of hydrogen filling machines. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a hydrogen filling machine control device, which improves the safety of the hydrogen filling machine during use.

[0004] The utility model adopts the following technical solutions to achieve the above object. The utility model provides a control device for a hydrogen filling machine, which includes a hydrogen filling gun interface module, a hydrogen detection module, and a control module. The hydrogen filling gun interface module includes an isolation transceiver U500, a first transient suppression diode T500, a second transient suppression diode T501, a third transient suppression diode T502, a first resistor R500, a second resistor R501, a third resistor R502, a fourth resistor R503, a fifth resistor R504, a sixth resistor R505, a seventh resistor R506, a first capacitor C500, and a first connector CON4. The first pin 1 and the second pin 2 of the isolation transceiver U500 are respectively connected to the control module through the first resistor R500 and the second resistor R501. The third pin 3 of the isolation transceiver U500 is grounded. The fourth pin 4 of the isolation transceiver U500 is grounded through the first capacitor C500. The fifth pin 5 of the isolation transceiver U500 is connected to the seventh pin 7 of the isolation transceiver U500 through the sixth resistor R505. The fifth pin 5 of the isolation transceiver U500 is also respectively connected to one end of the first transient suppression diode T500 and the second transient suppression diode T501. The other ends of the first transient suppression diode T500 and the second transient suppression diode T501 are respectively connected to the seventh pin 7 of the isolation transceiver U500 and the sixth pin 6 of the isolation transceiver U500. The seventh pin 7 of the isolation transceiver U500 is connected to the sixth pin 6 of the isolation transceiver U500 through the third resistor R502, the seventh resistor R506, and the fourth resistor R503. One end of the third resistor R502 is connected to the sixth pin 6 of the isolation transceiver U500, and the other end is connected to the seventh pin 7 of the isolation transceiver U500. The eighth pin 8 of the isolation transceiver U500 is connected to the sixth pin 6 of the isolation transceiver U500 through the fifth resistor R504. The sixth pin 6 and the seventh pin 7 of the isolation transceiver U500 respectively output RS485 signals to the first connector CON4.

[0005] Furthermore, the hydrogen detection module includes an isolation amplifier U902, an operational amplifier U1201A, an eighth resistor R911, a ninth resistor R912, a tenth resistor R913, an eleventh resistor R914, a twelfth resistor R915, and a second connector CON8. The non-inverting input terminal of the operational amplifier U1201A is connected to the third pin of the second connector CON8 through the eighth resistor R911 and grounded through the ninth resistor R912. The inverting input terminal of the operational amplifier U1201A is connected to the output terminal. The output terminal is connected to the second pin 2 of the isolation amplifier U902 through the tenth resistor R913. The second pin 2 of the isolation amplifier U902 is connected to the third pin 3 of the isolation amplifier U902 through the eleventh resistor R914. The third pin 3 and the fourth pin 4 of the isolation amplifier U902 are grounded. The sixth pin 6 of the isolation amplifier U902 is grounded. The seventh pin 7 of the isolation amplifier U902 is connected to the control module through the twelfth resistor R915.

[0006] Furthermore, the hydrogen detection module further includes a first optocoupler U906, a second optocoupler U907, a thirteenth resistor R916, a fourteenth resistor R917, a fifteenth resistor R918, a sixteenth resistor R919, a second capacitor C900, and a third capacitor C901;

[0007] The first pin of the first optocoupler U906 is connected to the fifth pin of the second connector CON8 through the thirteenth resistor R916. The second pin of the first optocoupler U906 is grounded. The third pin of the first optocoupler U906 is connected to an external power supply through the fourteenth resistor R917. The fourth pin of the first optocoupler U906 is grounded. The second capacitor C900 is connected between the first pin and the second pin of the first optocoupler U906. The first pin of the second optocoupler U907 is connected to the sixth pin of the second connector CON8 through the fifteenth resistor R918. The second pin of the second optocoupler U907 is grounded. The third pin of the second optocoupler U907 is connected to an external power supply through the sixteenth resistor R919. The third capacitor C901 is connected between the first pin and the second pin of the second optocoupler U907.

[0008] Furthermore, the model of the isolation amplifier U902 is AMC1200BDWV, and the models of the first optocoupler U906 and the second optocoupler U907 are CT181GB.

[0009] Furthermore, the model of the control module is GD32F450.

[0010] Further, the isolation transceiver U500 is of model TD301M485, and the first transient suppression diode T500, the second transient suppression diode T501, and the third transient suppression diode T502 are of model SMF6.5CA.

[0011] Advantages of the present utility model:

[0012] The hydrogen filling gun interface module of the present utility model realizes signal isolation and electrical isolation through an isolation transceiver, and adds a hydrogen detection module. An isolation amplifier and an optocoupler are adopted in the hydrogen detection module to realize signal isolation and electrical isolation, greatly improving the safety of the hydrogen filling machine. Description of the drawings

[0013] Figure 1 is a structural block diagram of a hydrogen filling machine control device provided by an embodiment of the present utility model;

[0014] Figure 2 is a circuit structure diagram of a control module provided by an embodiment of the present utility model;

[0015] Figure 3 is a circuit structure diagram of a hydrogen filling gun interface module provided by an embodiment of the present utility model;

[0016] Figure 4 is a circuit structure diagram of a first connector CON4 provided by an embodiment of the present utility model;

[0017] Figure 5 is a circuit structure diagram of a hydrogen detection module provided by an embodiment of the present utility model;

[0018] Figure 6 is a circuit structure diagram of an optocoupler provided by an embodiment of the present utility model;

[0019] Figure 7 is a circuit structure diagram of a second connector CON8 provided by an embodiment of the present utility model. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0021] The present utility model provides a hydrogen filling machine control device, as Figure 1 shown, including a hydrogen filling gun interface module, a hydrogen detection module, and a control module.

[0022] Specifically, the control module is as Figure 2As shown, the GD32F450 of GigaDevice is used as the main controller. The GD32F450 has extremely high computing performance. The maximum main frequency of the processor can reach 200MHz, and it provides a complete DSP instruction set, parallel computing ability and a dedicated floating-point unit FPU, thus integrating 32-bit control with leading digital signal processing technology to meet advanced computing requirements. Executing code directly in the flash memory has zero wait state. The GD32F450 is equipped with 512KB to 3072KB of on-chip Flash and 256KB to 512KB of SRAM. The dual-bank flash memory allows synchronous read and write operations, thus facilitating safe program upgrades without affecting application performance while updating software.

[0023] The peripheral interface resources include 8 USARTs, 6 SPIs, 3 fast I2Cs, 2 I2Ss, 2 CAN2.0Bs, 1 SDIO interface, 1 10 / 100M Ethernet controller MAC, and for the first time, it is equipped with two USB2.0 OTG interfaces, including a Full-Speed, 12Mbps and a High-Speed, 480Mbps interface, which can provide multiple transmission modes such as Device, HOST, and OTG.

[0024] Specifically, such as Figure 3As shown, the hydrogen filling gun interface module includes an isolation transceiver U500, which realizes the electrical isolation of communication signals and RS485 level conversion. The first transient suppression diode T500, the second transient suppression diode T501, and the third transient suppression diode T502 achieve surge protection for the hydrogen filling gun communication circuit. The first resistor R500, the second resistor R501, the third resistor R502, the fourth resistor R503, the fifth resistor R504, the sixth resistor R505, the seventh resistor R506, the first capacitor C500, and the first connector CON4. The first pin 1 and the second pin 2 of the isolation transceiver U500 are respectively connected to the control module through the first resistor R500 and the second resistor R501. The third pin 3 of the isolation transceiver U500 is grounded. The fourth pin 4 of the isolation transceiver U500 is grounded through the first capacitor C500. The fifth pin 5 of the isolation transceiver U500 is connected to the seventh pin 7 of the isolation transceiver U500 through the sixth resistor R505. The fifth pin 5 of the isolation transceiver U500 is also respectively connected to one end of the first transient suppression diode T500 and the second transient suppression diode T501. The other ends of the first transient suppression diode T500 and the second transient suppression diode T501 are respectively connected to the seventh pin 7 of the isolation transceiver U500 and the sixth pin 6 of the isolation transceiver U500. The seventh pin 7 of the isolation transceiver U500 is connected to the sixth pin 6 of the isolation transceiver U500 through the third resistor R502, the seventh resistor R506, and the fourth resistor R503. One end of the third resistor R502 is connected to the sixth pin 6 of the isolation transceiver U500, and the other end is connected to the seventh pin 7 of the isolation transceiver U500. The eighth pin 8 of the isolation transceiver U500 is connected to the sixth pin 6 of the isolation transceiver U500 through the fifth resistor R504. The sixth pin 6 and the seventh pin 7 of the isolation transceiver U500 respectively output RS485 signals to the first connector CON4. The circuit structure of the first connector CON4 is as Figure 4 shown.

[0025] In this embodiment, the model of the isolation transceiver U500 is TD301M485, and the models of the first transient suppression diode T500, the second transient suppression diode T501, and the third transient suppression diode T502 are SMF6.5CA.

[0026] Specifically, as Figure 5As shown in the figure, the hydrogen detection module includes an isolation amplifier U902, which amplifies the input 4-20mA current signal and provides electrical isolation from the control circuit. The operational amplifier U1201A, the eighth resistor R911, the ninth resistor R912, the tenth resistor R913, the eleventh resistor R914, the twelfth resistor R915, the second connector CON8, the first optocoupler U906, and the second optocoupler U907 are used to electrically isolate and input two stop signals of the hydrogen filling gun. The thirteenth resistor R916, the fourteenth resistor R917, the fifteenth resistor R918, the sixteenth resistor R919, the second capacitor C900, and the third capacitor C901. The non-inverting input terminal of the operational amplifier U1201A is connected to the third pin of the second connector CON8 through the eighth resistor R911 and grounded through the ninth resistor R912. The inverting input terminal of the operational amplifier U1201A is connected to its output terminal. The output terminal is connected to the second pin 2 of the isolation amplifier U902 through the tenth resistor R913. The second pin 2 of the isolation amplifier U902 is connected to the third pin 3 of the isolation amplifier U902 through the eleventh resistor R914. The third pin 3 of the isolation amplifier U902 and the fourth pin 4 of the isolation amplifier U902 are grounded. The sixth pin 6 of the isolation amplifier U902 is grounded. The seventh pin 7 of the isolation amplifier U902 is connected to the control module through the twelfth resistor R915.

[0027] As Figure 6 shown, the first pin of the first optocoupler U906 is connected to the fifth pin of the second connector CON8 through the thirteenth resistor R916. The second pin of the first optocoupler U906 is grounded. The third pin of the first optocoupler U906 is connected to an external power supply through the fourteenth resistor R917. The fourth pin of the first optocoupler U906 is grounded. The second capacitor C900 is connected between the first pin and the second pin of the first optocoupler U906. The first pin of the second optocoupler U907 is connected to the sixth pin of the second connector CON8 through the fifteenth resistor R918. The second pin of the second optocoupler U907 is grounded. The third pin of the second optocoupler U907 is connected to an external power supply through the sixteenth resistor R919. The third capacitor C901 is connected between the first pin and the second pin of the second optocoupler U907. The circuit structure of the second connector CON8 is as Figure 7 shown.

[0028] Specifically, the model of the isolation amplifier U902 is AMC1200BDWV, and the models of the first optocoupler U906 and the second optocoupler U907 are CT181GB.

[0029] The working principle of the present utility model:

[0030] The controller runs a predetermined hydrogen filling program, outputs control signals through the UART interface, and the control signals are electrically isolated from the external circuit and converted from TTL level to RS485 level through U500. The control signals output by the controller are transmitted to the hydrogen filling gun interface module through the RS485 bus to achieve the control of the hydrogen filling gun.

[0031] During the hydrogen filling process, the 4~20mA analog input signal of the sensor is detected simultaneously. After being electrically isolated and amplified by the front-end isolation operational amplifier, the signal is input to the corresponding pin of the controller. After completing the A / D conversion, it is supplied to the CPU for arithmetic processing, and the closed-loop control of the hydrogen filling gun is achieved according to the result.

[0032] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A hydrogen filling machine control device, characterized in that, It includes a hydrogen filling gun interface module, a hydrogen detection module and a control module. The hydrogen filling gun interface module includes an isolation transceiver (U500), a first transient suppression diode (T500), a second transient suppression diode (T501), a third transient suppression diode (T502), a first resistor (R500), a second resistor (R501), a third resistor (R502), a fourth resistor (R503), a fifth resistor (R504), a sixth resistor (R505), a seventh resistor (R506), a first capacitor (C500), and a first connector (CON4). The first pin (1) and the second pin (2) of the isolation transceiver (U500) are respectively connected to the control module through the first resistor (R500) and the second resistor (R501). The third pin (3) of the isolation transceiver (U500) is grounded. The fourth pin (4) of the isolation transceiver (U500) is grounded through the first capacitor (C500). The fifth pin (5) of the isolation transceiver (U500) is connected to the seventh pin (7) of the isolation transceiver (U500) through the sixth resistor (R505). The fifth pin (5) of the isolation transceiver (U500) is also respectively connected to one end of the first transient suppression diode (T500) and the second transient suppression diode (T501). The other ends of the first transient suppression diode (T500) and the second transient suppression diode (T501) are respectively connected to the seventh pin (7) of the isolation transceiver (U500) and the sixth pin (6) of the isolation transceiver (U500). The seventh pin (7) of the isolation transceiver (U500) is connected to the sixth pin (6) of the isolation transceiver (U500) through the third resistor (R502), the seventh resistor (R506) and the fourth resistor (R503). One end of the third resistor (R502) is connected to the sixth pin (6) of the isolation transceiver (U500), and the other end is connected to the seventh pin (7) of the isolation transceiver (U500). The eighth pin (8) of the isolation transceiver (U500) is connected to the sixth pin (6) of the isolation transceiver (U500) through the fifth resistor (R504). The sixth pin (6) and the seventh pin (7) of the isolation transceiver (U500) respectively output RS485 signals to the first connector (CON4).

2. The hydrogen filling machine control device according to claim 1, wherein, The hydrogen detection module includes an isolation amplifier (U902), an operational amplifier (U1201A), an eighth resistor (R911), a ninth resistor (R912), a tenth resistor (R913), an eleventh resistor (R914), a twelfth resistor (R915), and a second connector (CON8). The non-inverting input terminal of the operational amplifier (U1201A) is connected to the third pin of the second connector (CON8) through the eighth resistor (R911) and grounded through the ninth resistor (R912). The inverting input terminal of the operational amplifier (U1201A) is connected to the output terminal. The output terminal is connected to the second pin (2) of the isolation amplifier (U902) through the tenth resistor (R913). The second pin (2) of the isolation amplifier (U902) is connected to the third pin (3) of the isolation amplifier (U902) through the eleventh resistor (R914). The third pin (3) of the isolation amplifier (U902) and the fourth pin (4) of the isolation amplifier (U902) are grounded. The sixth pin (6) of the isolation amplifier (U902) is grounded. The seventh pin (7) of the isolation amplifier (U902) is connected to the control module through the twelfth resistor (R915).

3. The hydrogen filling machine control device according to claim 2, wherein The hydrogen detection module further includes a first optocoupler (U906), a second optocoupler (U907), a thirteenth resistor (R916), a fourteenth resistor (R917), a fifteenth resistor (R918), a sixteenth resistor (R919), a second capacitor (C900), and a third capacitor (C901); The first pin of the first optocoupler (U906) is connected to the fifth pin of the second connector (CON8) through the thirteenth resistor (R916). The second pin of the first optocoupler (U906) is grounded. The third pin of the first optocoupler (U906) is connected to an external power supply through the fourteenth resistor (R917). The fourth pin of the first optocoupler (U906) is grounded. The second capacitor (C900) is connected between the first pin and the second pin of the first optocoupler (U906). The first pin of the second optocoupler (U907) is connected to the sixth pin of the second connector (CON8) through the fifteenth resistor (R918). The second pin of the second optocoupler (U907) is grounded. The third pin of the second optocoupler (U907) is connected to an external power supply through the sixteenth resistor (R919). The third capacitor (C901) is connected between the first pin and the second pin of the second optocoupler (U907).

4. The hydrogen filling machine control device according to claim 3, characterized in that, The model of the isolation amplifier (U902) is AMC1200BDWV, and the models of the first optocoupler (U906) and the second optocoupler (U907) are CT181GB.

5. The hydrogen filling machine control device according to claim 1, characterized in that, The model of the control module is GD32F450.

6. The hydrogen filling machine control device according to claim 1, characterized in that, The model of the isolation transceiver (U500) is TD301M485, and the models of the first transient suppression diode (T500), the second transient suppression diode (T501), and the third transient suppression diode (T502) are SMF6.5CA.

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