Alternating current charging pile output short circuit safety detection device
By introducing an output short-circuit detection device into the charging pile, and using integrated circuits and other electronic components to detect the output short-circuit, the safety hazards caused by the charging pile are solved and the charging safety is ensured.
Patent Information
- Application Number
- CN202421849766.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The lack of output short-circuit detection of existing charging piles, which may burn the charging device, electric shock and fire when charging.
The output short-circuit detection protection device and the output short-circuit detection device are added to the charging device, and the output short-circuit detection device is used to detect the output short-circuit using components such as integrated circuits, MOS tubes, diodes, capacitors and relays, and then charge them after normal detection.
It effectively avoids safety problems such as damage to the charging device, electric shock to the human body and fire caused by output short circuit.
Smart Images
Figure CN223155207U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric vehicle charging, in particular to an alternating current charging pile output short - circuit safety detection device. Background Art
[0002] With the rapid development of new energy vehicles, the electric vehicle industry has won the favor of the public, and its market share has increased rapidly. However, at present, the charging pile does not have output short - circuit detection. Electric vehicles will continue to charge because the output is short - circuited before charging but not detected, resulting in the burning of the charging pile. Seriously, it will cause safety problems such as electric shock and fire. Content of the Utility Model
[0003] In view of the problems existing in the prior art, the utility model discloses an alternating current charging pile output short - circuit safety detection device, including an output short - circuit detection protection device and an output short - circuit detection device;
[0004] The output short - circuit detection protection device includes an integrated circuit IC1, a P - channel MOS transistor Q1, a diode D2, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a capacitor C2, and a capacitor C3; Pin 1 of the integrated circuit IC1 is sequentially connected in series with a resistor R4 and a resistor R2 and then connected to the negative electrode of the diode D2; Both ends of the capacitor C3 are respectively connected to the negative electrode of the diode D2 and pin 2 of the integrated circuit IC1; Both ends of the resistor R5 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; One end of the resistor R6 is connected to pin 3 of the integrated circuit IC1, and the other end is grounded; One end of the capacitor C2 is connected to pin 4 of the integrated circuit IC1, and the other end is grounded. The G - pole and S - pole of the P - channel MOS transistor Q1 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; The output short - circuit detection device includes a relay, a triode Q2, a capacitor C1, a resistor R1, a resistor R3, a resistor R7, a resistor R8, a resistor R9, and a diode D3; Relay pin 1 is connected to the D - pole of the P - channel MOS transistor Q1; Relay pin 4 is sequentially connected in series with a resistor R3 and a resistor R1 and then connected to VCC1; One end of the resistor R8 is connected to relay pin 9, and the other end is grounded; The positive electrode of the diode D3 is connected to relay pin 12, and the negative electrode is connected to relay pin 1; The C - pole of the triode Q2 is connected to relay pin 12, the B - pole is connected to the resistor R7, and the E - pole is grounded; One end of the resistor R9 is connected to the B - pole of the triode Q2, and the other end is grounded;
[0005] The positive electrode of the diode D2 and relay pin 5 are connected to LOUT, and pin 2 of the integrated circuit IC1 and relay pin 8 are connected to NOUT.
[0006] As a preferred technical solution of the utility model, pin 4 of the integrated circuit IC1 is connected to VCC2.
[0007] As a preferred technical solution of the present utility model, a CPU is connected between the resistor R1 and the resistor R3 for voltage sampling.
[0008] As a preferred technical solution of the present utility model, the relay control signal is input from the other end of the resistor R7.
[0009] Beneficial effects of the present utility model: The present utility model adds an output short - circuit detection protection device and an output short - circuit detection device to the charging device, which can detect whether the output is short - circuited. After normal detection, charging is carried out, avoiding safety problems such as the charging device being burned out, electric shock to the human body, and fire caused by output short - circuit. Description of the Drawings
[0010] In order to more clearly illustrate the specific implementation manners of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. In all the drawings, the elements or parts do not necessarily draw according to the actual proportion.
[0011] Figure 1 It is the schematic diagram of the present utility model;
[0012] Figure 2 It is the schematic diagram of the circuit connection of the present utility model; Specific Implementation Manner
[0013] Embodiment 1
[0014] Such as Figures 1 to 2As shown in the figure, the utility model discloses an output short - circuit safety detection device for an AC charging pile, which includes an output short - circuit detection and protection device and an output short - circuit detection device; the output short - circuit detection and protection device includes an integrated circuit IC1, a P - channel MOS transistor Q1, a diode D2, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a capacitor C2, and a capacitor C3; pin 1 of the integrated circuit IC1 is sequentially connected in series with the resistor R4 and the resistor R2 and then connected to the negative electrode of the diode D2; both ends of the capacitor C3 are respectively connected to the negative electrode of the diode D2 and pin 2 of the integrated circuit IC1; both ends of the resistor R5 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; one end of the resistor R6 is connected to pin 3 of the integrated circuit IC1, and the other end is grounded; one end of the capacitor C2 is connected to pin 4 of the integrated circuit IC1, and the other end is grounded. The G - pole and S - pole of the P - channel MOS transistor Q1 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; the output short - circuit detection device includes a relay, a triode Q2, a capacitor C1, a resistor R1, a resistor R3, a resistor R7, a resistor R8, a resistor R9, and a diode D3; pin 1 of the relay is connected to the D - pole of the P - channel MOS transistor Q1; pin 4 of the relay is sequentially connected in series with the resistor R3 and the resistor R1 and then connected to VCC1; one end of the resistor R8 is connected to pin 9 of the relay, and the other end is grounded; the positive electrode of the diode D3 is connected to pin 12 of the relay, and the negative electrode is connected to pin 1 of the relay; the C - pole of the triode Q2 is connected to pin 12 of the relay, the B - pole is connected to the resistor R7, and the E - pole is grounded; one end of the resistor R9 is connected to the B - pole of the triode Q2, and the other end is grounded. Before the electric vehicle is charged, the output end is detected, and a protection circuit is set up, which can effectively avoid safety problems such as the charging device being burned out, human body electric shock, and fire caused by output short - circuit.
[0015] The working principle of the utility model is as follows: VCC1 is connected to pin 1 and pin 4 of the relay through the resistor R1 and the resistor R3, and pin 5 of the relay is connected to the output LOUT. Pin 9 of the relay is grounded through R8, and pin 8 of the relay is connected to the output NOUT. The connection point A between the resistor R1 and the resistor R3 is connected to the CPU for sampling. Before charging, the relay is controlled to close. Pin 4 and pin 5 of the relay are conducted, and pin 9 and pin 8 of the relay are conducted. When the output LOUT and NOUT are not short - circuited, the voltage at point A is at a high potential. When the output LOUT and NOUT are short - circuited, the voltage at point A is directly pulled to 0, thereby judging whether the output is short - circuited.
[0016] After the output short - circuit detection is completed, charging starts, and there is voltage at the output end. At this time, through the rectification and filtering of the diode D2 and the capacitor C2, through the resistor R2, the resistor R4, the integrated circuit IC1, the resistor R5, the resistor R6, the P - channel MOS transistor Q1, the power supply of the control relay at point C is disconnected, and both software and hardware perform the anti - trigger action of the relay to ensure the safety of the circuit.
[0017] Components not described in detail in this document are prior art.
[0018] Although the specific embodiments of the present utility model have been described in detail above, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model, and modifications or deformations that do not involve creative labor are still within the protection scope of the present utility model.
Claims
1. An output short-circuit safety detection device for an AC charging pile, characterized in that: It includes an output short-circuit detection protection device and an output short-circuit detection device; The output short-circuit detection protection device includes an integrated circuit IC1, a P-channel MOS transistor Q1, a diode D2, a resistor R2, a resistor R4, a resistor R5, a resistor R6, a capacitor C2, and a capacitor C3; Pin 1 of the integrated circuit IC1 is sequentially connected in series with the resistor R4 and the resistor R2 and then connected to the negative electrode of the diode D2; Both ends of the capacitor C3 are respectively connected to the negative electrode of the diode D2 and pin 2 of the integrated circuit IC1; Both ends of the resistor R5 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; One end of the resistor R6 is connected to pin 3 of the integrated circuit IC1, and the other end is grounded; One end of the capacitor C2 is connected to pin 4 of the integrated circuit IC1, and the other end is grounded. The G pole and S pole of the P-channel MOS transistor Q1 are respectively connected to pin 3 and pin 4 of the integrated circuit IC1; The output short-circuit detection device includes a relay, a triode Q2, a capacitor C1, a resistor R1, a resistor R3, a resistor R7, a resistor R8, a resistor R9, and a diode D3; The relay pin 1 is connected to the D pole of the P-channel MOS transistor Q1; Relay pin 4 is sequentially connected in series with the resistor R3 and the resistor R1 and then connected to VCC1; One end of the resistor R8 is connected to relay pin 9, and the other end is grounded; The positive electrode of the diode D3 is connected to relay pin 12, and the negative electrode is connected to relay pin 1; The C pole of the triode Q2 is connected to relay pin 12, the B pole is connected to the resistor R7, and the E pole is grounded; One end of the resistor R9 is connected to the B pole of the triode Q2, and the other end is grounded; The positive electrode of the diode D2 and relay pin 5 are connected to LOUT, and integrated circuit IC1 pin 2 and relay pin 8 are connected to NOUT.
2. The output short-circuit safety detection device for an AC charging pile according to claim 1, characterized in that: Integrated circuit IC1 pin 4 is connected to VCC2.
3. The output short-circuit safety detection device for an AC charging pile according to claim 1, characterized in that: A CPU is connected between the resistor R1 and the resistor R3 for voltage sampling.
4. The output short-circuit safety detection device for an AC charging pile according to claim 1, characterized in that: The relay control signal is input from the other end of the resistor R7.