Pulse type charging gun control circuit

Abstract

The utility model provides a pulse type charging gun control circuit. The circuit comprises a pulse signal input circuit, a relay, an energy storage capacitor and an electromagnetic lock, the pulse signal input circuit comprises a triode and a diode which are connected in sequence, a base b of the triode is connected to a signal input end through a first resistor, and an anode of the diode is connected with a collector C of the triode; a port A of the electromagnetic lock is connected with a pin 1 of the relay, a port B of the electromagnetic lock is connected with a pin 2 of the relay through the energy storage capacitor, and the relay unlocks or locks the electromagnetic lock through a level signal output by the pulse signal input circuit. The utility model relates to the field of automobile charging guns.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile charging gun, especially to a pulse type charging gun control circuit. BACKGROUND

[0002] The charging gun electromagnetic lock is a device applied to new energy vehicles, responsible for controlling the safety and efficiency of the charging process. It is part of the new energy vehicle related technology, which uses unconventional vehicle fuel or new vehicle power devices, has the characteristics of advanced technology, new structure, etc., and has small or even zero tail gas emissions, which can effectively reduce the emission of nitrogen dioxide and has important significance for sustainable development.

[0003] The conventional electromagnetic lock on the market needs to be powered for a long time, which requires a lot of energy consumption. Therefore, a pulse type gun control circuit that does not need long-term continuous power supply is developed, which can better save energy. UTILITY MODEL CONTENT

[0004] In view of the problems existing in the prior art, the utility model provides a pulse type charging gun control circuit. It aims to better save energy.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is: a pulse type charging gun control circuit, comprising a pulse signal input circuit, a relay, an energy storage capacitor and an electromagnetic lock, the pulse signal input circuit comprises a triode and a diode connected in turn, the base b of the triode is connected to the signal input end through a first resistor, the anode of the diode is connected with the collector C of the triode, the port A of the electromagnetic lock is connected with the pin 1 of the relay, the port B of the electromagnetic lock is connected with the pin 2 of the relay through the energy storage capacitor, and the relay is unlocked or locked by the level signal output by the pulse signal input circuit.

[0006] Based on the above, the utility model utilizes the characteristic that the voltage of the energy storage capacitor cannot be suddenly changed, adjusts the capacity of the energy storage capacitor to adjust the delay time of the electromagnetic lock, is more energy-saving compared with the traditional power supply type, and reduces the loss of resources. At the same time, the triode can amplify the electric signal, improve the stability of signal transmission, and make the locking and unlocking of the electromagnetic lock more stable and accurate. In addition, the diode can prevent the reverse high-voltage current from causing breakdown of the triode, and plays a role in protecting the circuit.

[0007] Furthermore, the relay includes a relay coil, a first normally closed contact, a second normally closed contact, a first normally open contact, and a second normally open contact. One end of the first normally closed contact is connected to one end of the first normally open contact, and the other end of the first normally open contact is connected to the negative terminal of the power supply. The other end of the first normally closed contact is connected to one end of the second normally closed contact, and the other end of the second normally closed contact is connected to the second normally open contact. The other end of the second normally open contact is connected to the positive terminal of the power supply.

[0008] Based on the above, different voltages are input to the relay coil to control the opening or closing state of each contact.

[0009] Furthermore, a second resistor is provided between the base b and the emitter e of the transistor, and the emitter e of the transistor is grounded.

[0010] Based on the above, the second resistor can stabilize the bias point of the transistor and reduce uncertainties caused by temperature changes or other factors. Simultaneously, it provides a discharge path when the transistor is turned off, quickly releasing residual charge in the transistor, reducing time lag, and thus improving the circuit's response speed.

[0011] Furthermore, the internal resistance of the electromagnetic lock is 10Ω.

[0012] To more clearly illustrate the above-mentioned features of this utility model and the objectives it aims to achieve, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0014] like Figure 1 As shown, a pulse-type charging gun control circuit includes a pulse signal input circuit L1, a relay K, an energy storage capacitor E1, and an electromagnetic lock LK. The pulse signal input circuit L1 includes a transistor Q1 and a diode D1 connected in sequence. The base b of the transistor Q1 is connected to the signal input terminal Vin through a first resistor R1. The anode of the diode D1 is connected to the collector C of the transistor Q1. Port A of the electromagnetic lock LK is connected to pin 1 of the relay K, and port B of the electromagnetic lock LK is connected to pin 2 of the relay K through the energy storage capacitor E1. The internal resistance of the electromagnetic lock LK is 10Ω, and it requires continuous power-on for 40ms to lock or unlock. The relay K unlocks or locks the electromagnetic lock LK based on the level signal output from the pulse signal input circuit L1.

[0015] Further, the relay K includes a relay coil KA, a first normally closed contact K1, a second normally closed contact K2, a first normally open contact K3 and a second normally open contact K4, one end of the first normally closed contact K1 is connected with one end of the first normally open contact K3, the other end of the first normally open contact K3 is connected with a negative pole of a power supply, the other end of the first normally closed contact K1 is connected with one end of the second normally closed contact K2, the other end of the second normally closed contact K2 is connected with the second normally open contact K4, the other end of the second normally open contact K4 is connected with a positive pole of the power supply.

[0016] Further, the base b of the transistor Q1 is connected with the emitter e through a second resistor R2, and the emitter e of the transistor Q1 is grounded. The second resistor R2 can stabilize the bias point of the transistor Q1 and reduce the uncertainty caused by temperature change or other factors. Meanwhile, the second resistor R2 can provide a discharge path when the transistor Q1 is turned off, quickly release the residual charge in the transistor, reduce the time lag, and thus improve the response speed of the circuit.

[0017] The specific implementation of the embodiment is as follows:

[0018] Locked state: the signal input end Vin inputs a high level, and the level signal is transmitted to the relay coil KA through signal amplification of the transistor Q1, so that the first normally open contact K3 and the second normally open contact K4 are closed. At the moment of closing, the B port of the electromagnetic lock LK is a positive power supply, the A port is a negative power supply, and the electromagnetic lock LK is in a locked state. At this time, 8V-12V voltage acts on the electromagnetic lock LK, and the action time is as follows:

[0019]

[0020] Unlocked state: the signal input end Vin inputs a low level, and the level signal is transmitted to the relay coil KA through signal amplification of the transistor Q1, so that the first normally open contact K3 and the second normally open contact K4 are opened. At the moment of opening, the A port of the electromagnetic lock LK is a positive power supply, the B port is a negative power supply, and the electromagnetic lock LK is in an unlocked state. At this time, 8V-12V voltage acts on the electromagnetic lock LK, and the action time is as follows:

[0021]

[0022] Adjust the capacitance of the energy storage capacitor E1 to 10000μF, and the t≈40.55ms can be calculated through the above formula, which meets the requirement of the electromagnetic lock LK that needs to be powered for 40ms.

[0023] The above merely describes the best solution embodiment of the present application, and is not used to limit the present application. Various modifications or replacements of the present application made by those skilled in the art without departing from the essence and protection scope of the present application shall be within the protection scope of the present application.

Claims

1. A pulsed charging gun control circuit, characterized by: It includes pulse signal input circuit (L1), relay (K), energy storage capacitor (E1) and electromagnetic lock (LK), the pulse signal input circuit (L1) includes the triode (Q1) and diode (D1) connected in sequence, the base b of the triode (Q1) is connected to the signal input end (Vin) through the first resistance (R1), the anode of the diode (D1) is connected with the collector C of the triode (Q1), the port A of the electromagnetic lock (LK) is connected with the pin 1 of the relay (K), the port B of the electromagnetic lock (LK) is connected with the pin 2 of the relay (K) through the energy storage capacitor (E1), the relay (K) is unlocked or locked to the electromagnetic lock (LK) through the level signal output by the pulse signal input circuit (L1).

2. A control circuit for a pulse type charging gun as defined in claim 1, characterized in that: The relay (K) includes relay coil (KA), first normally closed contact (K1), second normally closed contact (K2), first normally open contact (K3) and second normally open contact (K4), one end of the first normally closed contact (K1) is connected with one end of the first normally open contact (K3), the other end of the first normally open contact (K3) is connected to the negative electrode of power supply, the other end of the first normally closed contact (K1) is connected with one end of the second normally closed contact (K2), the other end of the second normally closed contact (K2) is connected with the second normally open contact (K4), the other end of the second normally open contact (K4) is connected to the positive electrode of power supply.

3. A control circuit for a pulse type charging gun as defined in claim 1, wherein: The base b of the triode (Q1) is provided with the second resistance (R2) between the emitter e, the emitter e of the triode (Q1) is grounded.

4. The pulsed charging gun control circuit of claim 1, wherein: The internal resistance of the electromagnetic lock (LK) is 10 Ω.

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