Charging pile water immersion detection system

Abstract

The utility model relates to a charging pile water immersion detection system which comprises a water immersion sensor, an MCU, a main control chip output module, a power supply module and a circuit breaker, the power supply end of the power supply module is connected with the input end of the MCU, and the power supply end of the power supply module is connected with the input end of the water immersion sensor. The power supply end of the power supply module is connected with the input end of the main control chip output module, the output end of the water sensor is connected with the input end of the MCU, the output end of the MCU is connected with the input end of the main control chip output module, and the output end of the main control chip output module is connected with the controlled end of the circuit breaker. According to the utility model, the water immersion early warning function can be automatically completed, so that the purpose of avoiding water immersion short circuit is achieved.

Description

Technical Field

[0001] The utility model relates to the field of sensing detection circuits and relates to a water immersion detection system for a charging pile. Background Art

[0002] New energy charging piles are the infrastructure for electric vehicle charging. Since the batteries of electric vehicles need direct current for charging, new energy charging piles access alternating current through the power grid, then convert the alternating current into direct current through the internal power conversion device, and then connect to the electric vehicle through the charging gun to charge the direct current into the vehicle battery.

[0003] After retrieval, the patent: An electrode type water immersion detection circuit and a water immersion sensor (CN201921256765.6), includes: a first electrode signal input unit, which is used to convert and amplify the first PWM signal received at the input end and is coupled to the first electrode through the output end; a second electrode signal input unit, which is used to convert and amplify the second PWM signal received at the input end and is coupled to the second electrode through the output end; a comparison unit, whose first input end is coupled to the first electrode and the second input end is coupled to the reference voltage signal, and is used to compare the voltage of the first electrode and the reference voltage signal; and a signal output unit, whose input end is coupled to the output end of the comparison unit, and is used to amplify the output signal of the comparison unit and output it as a detection signal; wherein, the PWM signals output by the first electrode signal input unit and the second electrode signal input unit to the electrodes have the same period and pulse width, the phase sequence difference is 180 degrees, and the signal duty cycle D≤5%. The above protection circuit is relatively complex and requires comparison, resulting in low efficiency and slow response.

[0004] In view of the above defects, the designer actively conducts research and innovation in order to create a water immersion detection system for a charging pile with a new structure, making it more valuable in industrial applications. Summary of the Utility Model

[0005] To solve the above technical problems, the purpose of the utility model is to provide a water immersion detection system for a charging pile.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A water immersion detection system for a charging pile includes a water immersion sensor, an MCU, a main control chip output module, a power supply module, and a circuit breaker. The power supply end of the power supply module is connected to the input end of the MCU, the power supply end of the power supply module is connected to the input end of the water immersion sensor, the power supply end of the power supply module is connected to the input end of the main control chip output module, the output end of the water immersion sensor is connected to the input end of the MCU, the output end of the MCU is connected to the input end of the main control chip output module, and the output end of the main control chip output module is connected to the controlled end of the circuit breaker.

[0008] Preferably, for the described charging pile water immersion detection system, the model of the MCU is STM32F103C8T6.

[0009] Preferably, for the described charging pile water immersion detection system, the power supply module includes chip U29 and chip U30. The first pin of chip U29 is connected to the eighth pin of chip U2 through capacitor C13. The second pin of chip U2 is connected to DC24V through switch SW1. Between the second pin of chip U2 and switch SW1, there are capacitors C9, C10, and C11 connected in parallel. Capacitor C9 is grounded. The second pin of chip U2 is connected to DC12V. The second pin of chip U2 is connected to the third pin of chip U2 through resistor R13. The third pin of chip U2 is grounded through resistor R9. The fourth pin of chip U2 is grounded through capacitor C12. The eighth pin of chip U2 is connected to the third pin of chip U30 through inductor L1. The seventh pin of chip U2 is connected to the anode of diode D2. The cathode of diode D2 is connected to one end of inductor L1. The sixth pin of chip U2 is grounded through capacitor C17. Capacitor C17 is in parallel with the series-connected capacitors C14 and resistor R14. The fifth pin of chip U2 is grounded through resistor R17. Resistor R17 is connected to DC5V through the series-connected resistors R15 and R16. Between inductor L1 and the third pin of chip U30, there are capacitors C26, C27, and C30 connected in parallel. The second pin of chip U30 is connected to the fourth pin of chip U30. The first pin of chip U30 is grounded. The fourth pin of chip U30 is connected to the anode of LED1 through resistor R92. The cathode of LED1 is grounded. The fourth pin of chip U30 is connected to the parallel-connected capacitors C41 and C40. The fourth pin of chip U30 is connected to DC3.3V.

[0010] Preferably, for the described charging pile water immersion detection system, the model of U29 is TPS54331DR, and the model of chip U30 is AMS1117-3.3.

[0011] Preferably, for the described charging pile water immersion detection system, the switch SW1 uses K8-5855D-L1.

[0012] Preferably, for the described water immersion detection system of a charging pile, it is characterized in that: the main control chip output module includes chip U1. The first pin of chip U1 is connected to the USART1_RXD terminal, the fourth pin of chip U1 is connected to the USART1_TXD terminal, the second pin and the third pin of chip U1 are connected and then grounded. A resistor R2 and a resistor R3 are connected between the first pin and the fourth pin of chip U1. A connection between resistor R2 and resistor R3 is connected to DC3.3V. The bottom board pin of chip U1 is grounded through a capacitor C5. The seventh pin and the sixth pin of chip U1 are connected to a circuit breaker. The fifth pin of chip U1 is grounded. Capacitor C5 is connected to DC3.3V through series-connected resistors R8, R9, and R10, where resistor R10 is connected to the seventh pin and the sixth pin of chip U1.

[0013] Preferably, for the described water immersion detection system of a charging pile, the model of chip U1 is MAX13085.

[0014] By means of the above solution, the present utility model has at least the following advantages:

[0015] The water immersion signal processor of the present utility model, which consists of a water immersion sensor and an MCU, processes the analog signal received by the sensor through stm32 and outputs it as a digital signal, and controls the circuit breaker to open through the rs485 communication network, which can automatically complete the early warning function of water immersion to achieve the purpose of avoiding water immersion short circuit, protecting the equipment, and thus reducing the maintenance cost.

[0016] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the description, the following takes the preferred embodiment of the present utility model and describes it in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 is the principle block diagram of the present utility model;

[0019] Figure 2 is the circuit diagram of the MCU of the present utility model;

[0020] Figure 3 is the circuit diagram of the water immersion sensor of the present utility model;

[0021] Figure 4 is the circuit diagram of the main control chip output module of the present utility model;

[0022] Figure 5 is the circuit diagram of the power supply module of the present utility model. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Generally, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0025] Embodiment

[0026] As Figures 1 to 5 shown, a charging pile water immersion detection system includes a water immersion sensor 1, an MCU 2, a main control chip output module 3, a power supply module 4, and a circuit breaker 5. The power supply end of the power supply module 4 is connected to the input end of the MCU 2, the power supply end of the power supply module 4 is connected to the input end of the water immersion sensor 1, the power supply end of the power supply module 4 is connected to the input end of the main control chip output module 3, the output end of the water immersion sensor 1 is connected to the input end of the MCU 2, the output end of the MCU 2 is connected to the input end of the main control chip output module 3, and the output end of the main control chip output module 3 is connected to the controlled end of the circuit breaker 5.

[0027] In the present utility model, the model of the MCU 2 is STM32F103C8T6.

[0028] In the present utility model, the power supply module 4 includes a chip U29 and a chip U30. The first pin of the chip U29 is connected to the eighth pin of the chip U2 through a capacitor C13. The second pin of the chip U2 is connected to DC24V through a switch SW1. A parallel combination of a capacitor C9, a capacitor C10, and a capacitor C11 is connected between the second pin of the chip U2 and the switch SW1. The capacitor C9 is grounded. The second pin of the chip U2 is connected to DC12V. The second pin of the chip U2 is connected to the third pin of the chip U2 through a resistor R13. The third pin of the chip U2 is grounded through a resistor R9. The fourth pin of the chip U2 is grounded through a capacitor C12. The eighth pin of the chip U2 is connected to the third pin of the chip U30 through an inductor L1. The seventh pin of the chip U2 is connected to the anode of a diode D2. The cathode of the diode D2 is connected to one end of the inductor L1. The sixth pin of the chip U2 is grounded through a capacitor C17. The capacitor C17 is in parallel with a series combination of a capacitor C14 and a resistor R14. The fifth pin of the chip U2 is grounded through a resistor R17. The resistor R17 is connected to DC5V through a series combination of a resistor R15 and a resistor R16. A parallel combination of a capacitor C26, a capacitor C27, and a capacitor C30 is connected between the inductor L1 and the third pin of the chip U30. The second pin of the chip U30 is connected to the fourth pin of the chip U30. The first pin of the chip U30 is grounded. The fourth pin of the chip U30 is connected to the anode of an LED1 through a resistor R92. The cathode of the LED1 is grounded. The fourth pin of the chip U30 is connected to a parallel combination of a capacitor C41 and a capacitor C40. The fourth pin of the chip U30 is connected to DC3.3V.

[0029] Among them, the model of the U29 is TPS54331DR, and the model of the chip U30 is AMS1117-3.3; the switch SW1 adopts K8-5855D-L1.

[0030] In the present utility model, the main control chip output module 3 includes a chip U1. The first pin of the chip U1 is connected to the USART1_RXD terminal. The fourth pin of the chip U1 is connected to the USART1_TXD terminal. The second pin and the third pin of the chip U1 are connected and then grounded. A resistor R2 and a resistor R3 are connected between the first pin and the fourth pin of the chip U1. DC3.3V is connected between the resistor R2 and the resistor R3. The bottom board pin of the chip U1 is grounded through a capacitor C5. The seventh pin and the sixth pin of the chip U1 are connected to a circuit breaker 5. The fifth pin of the chip U1 is grounded. The capacitor C5 is connected to DC3.3V through a series combination of a resistor R8, a resistor R9, and a resistor R10. Among them, the resistor R10 is connected to the seventh pin and the sixth pin of the chip U1. Among them, the model of the chip U1 is MAX13085.

[0031] The working principle of the present utility model is as follows:

[0032] During specific operation, after the water immersion sensor senses, it transmits the signal to the MCU. After the MCU processes it by itself, if it reaches the set range (set by those skilled in the art), the MCU controls the circuit breaker through the main control chip output module, disconnects the circuit breaker, and thus protects the charging pile.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0037] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A charging pile water immersion detection system, characterized in that: It includes a water immersion sensor (1), an MCU (2), a main control chip output module (3), a power supply module (4), and a circuit breaker (5). The power supply terminal of the power supply module (4) is connected to the input terminal of the MCU (2), the power supply terminal of the power supply module (4) is connected to the input terminal of the water immersion sensor (1), the power supply terminal of the power supply module (4) is connected to the input terminal of the main control chip output module (3), the output terminal of the water immersion sensor (1) is connected to the input terminal of the MCU (2), the output terminal of the MCU (2) is connected to the input terminal of the main control chip output module (3), and the output terminal of the main control chip output module (3) is connected to the controlled terminal of the circuit breaker (5).

2. The water immersion detection system for a charging pile according to claim 1, wherein: The model of the MCU (2) is STM32F103C8T6.

3. The water immersion detection system for a charging pile according to claim 1, wherein: The power supply module (4) includes chip U29 and chip U30. The first pin of chip U29 is connected to the eighth pin of chip U2 through capacitor C13. The second pin of chip U2 is connected to DC24V through switch SW1. A parallel combination of capacitor C9, capacitor C10, and capacitor C11 is connected between the second pin of chip U2 and switch SW1. Capacitor C9 is grounded. The second pin of chip U2 is connected to DC12V. The second pin of chip U2 is connected to the third pin of chip U2 through resistor R13. The third pin of chip U2 is grounded through resistor R9. The fourth pin of chip U2 is grounded through capacitor C12. The eighth pin of chip U2 is connected to the third pin of chip U30 through inductor L1. The seventh pin of chip U2 is connected to the anode of diode D2. The cathode of diode D2 is connected to one end of inductor L1. The sixth pin of chip U2 is grounded through capacitor C17. Capacitor C17 is in parallel with the series combination of capacitor C14 and resistor R14. The fifth pin of chip U2 is grounded through resistor R17. Resistor R17 is connected to DC5V through the series combination of resistor R15 and resistor R16. A parallel combination of capacitor C26, capacitor C27, and capacitor C30 is connected between inductor L1 and the third pin of chip U30. The second pin of chip U30 is connected to the fourth pin of chip U30. The first pin of chip U30 is grounded. The fourth pin of chip U30 is connected to the anode of LED1 through resistor R92. The cathode of LED1 is grounded. The fourth pin of chip U30 is connected to the parallel combination of capacitor C41 and capacitor C40. The fourth pin of chip U30 is connected to DC3.3V.

4. The water immersion detection system of a charging pile according to claim 3, characterized in that: The model of U29 is TPS54331DR, and the model of chip U30 is AMS1117-3.

3.

5. The water immersion detection system of a charging pile according to claim 3, wherein: The switch SW1 uses K8-5855D-L1.

6. The water immersion detection system of a charging pile according to claim 1, characterized in that: The main control chip output module (3) includes a chip U1. The first pin of the chip U1 is connected to the USART1_RXD terminal, the fourth pin of the chip U1 is connected to the USART1_TXD terminal, the second pin and the third pin of the chip U1 are connected and then grounded. A resistor R2 and a resistor R3 are connected between the first pin and the fourth pin of the chip U1. A connection between the resistor R2 and the resistor R3 is connected to DC3.3V. The bottom pin of the chip U1 is grounded through a capacitor C5. The seventh pin and the sixth pin of the chip U1 are connected to a circuit breaker (5). The fifth pin of the chip U1 is grounded. The capacitor C5 is connected to DC3.3V through a series connection of a resistor R8, a resistor R9, and a resistor R10, where the resistor R10 is connected to the seventh pin and the sixth pin of the chip U1.

7. The water immersion detection system for a charging pile according to claim 6, characterized in that: The model of the chip U1 is MAX13085.

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