CP signal generation circuit of new energy automobile charging pile
Through the integrated CP signal generation circuit of the combination of operational amplifier and transistor, the problem of many components and poor driving capabilities in the prior art is solved, and the effect of fewer components generating CP signals and enhancing driving capabilities is achieved.
Patent Information
- Application Number
- CN202421567296.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The CP signal generation circuit of the existing charging device has problems such as large number of components, poor consistency, large circuit size and poor driving capability, and is easily disturbed.
A new energy vehicle charging pile CP signal generation circuit was designed. By integrating the operational amplifier and transistor combination, CP signals were generated using fewer components, and the two transistors were output complementary to enhance driving capabilities.
The CP signal is generated through fewer components, which enhances the driving capability and avoids the problems of large circuit size and susceptibility to interference.
Smart Images
Figure CN222802838U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of switching power supplies, and in particular relates to a CP signal generating circuit for a new energy vehicle charging pile. Background Art
[0002] As the new energy vehicle market continues to grow, the demand for AC charging piles is becoming increasingly prominent. During the charging process, users have higher expectations for the convenience and safety of charging. The CP signal (Control Pilot Function, referred to as CP signal) plays a vital role in the AC charging pile. It is a bridge for communication between the charging pile and the car to ensure accurate control of the charging current and status. When the electric vehicle is charging, the charging pile will generate a CP signal, send instructions to the vehicle through the communication line between the charging socket and the vehicle, and adjust the charging current. The signal covers various states of the charging gun, such as plugging and unplugging, preparing, starting and stopping charging, etc. It is a real-time monitoring of the interaction between the charging pile and the new energy vehicle to ensure the safety and efficiency of the charging process. The CP signal can also effectively prevent safety hazards such as overload and short circuit between the vehicle and the charging pile. However, some of the CP signal generation circuits of existing charging devices are built using discrete components, resulting in a large number of components, poor consistency, and large circuit size. Some circuits use integrated circuits, but have poor driving capabilities and are easily interfered over long distances. Utility Model Content
[0003] In view of the above-mentioned defects in the prior art, the purpose of the present utility model is to provide a new energy vehicle charging pile CP signal generating circuit, which can realize the generation of CP signal through fewer components and has strong driving capability.
[0004] The purpose of this utility model will be achieved through the following technical solutions:
[0005] A new energy vehicle charging pile CP signal generating circuit includes a positive input terminal of an integrated operational amplifier connected to a PWM signal input terminal, a negative input terminal of the integrated operational amplifier connected to a third resistor, an output terminal of the integrated operational amplifier connected to a tenth resistor, a first and a second output terminal of the tenth resistor respectively connected to two triodes, and a CP signal output terminal connected between the two triodes.
[0006] Preferably, the transistors are respectively NPN transistors and PNP transistors.
[0007] Preferably, the PWM signal is connected from the PWM signal input end to the positive input end of the integrated operational amplifier via the first capacitor and the eighth resistor respectively, and the negative input end of the integrated operational amplifier is connected to the grounded third resistor.
[0008] Preferably, the negative input terminal of the integrated operational amplifier is also connected to a third capacitor, the other end of the third capacitor is connected to a sixth resistor through a first diode, the second end of the sixth resistor is respectively connected to a grounded second resistor and a CP signal detection terminal, and a grounded second capacitor is also connected between the CP signal detection terminal and the second resistor input terminal.
[0009] Preferably, the power supply interface of the integrated operational amplifier is connected to a ±15V operating voltage, and the negative power supply interface of the operational amplifier is also connected to a fourth resistor, the other end of the fourth resistor is connected to the fifth resistor through the first capacitor and the eighth resistor, and the other end of the fifth resistor is connected to the 15V operating voltage.
[0010] The outstanding effect of the utility model is that the CP signal can be generated from the PWM signal through fewer components, and the complementary output is achieved through two triodes, and the driving ability is stronger than that of the existing CP signal generation circuit.
[0011] The specific implementation methods of the utility model are further described below in combination with the accompanying drawings of the embodiments, so that the technical solution of the utility model is easier to understand and grasp. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 It is a schematic diagram of the circuit structure of the utility model. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following Figure 1 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0015] The utility model discloses a new energy vehicle charging pile CP signal generating circuit, including a positive input terminal of an integrated operational amplifier U1 connected to a PWM signal input terminal, and the PWM signal is connected to the positive input terminal of the integrated operational amplifier U1 via a first capacitor C1 and an eighth resistor R8 from the PWM signal input terminal.
[0016] The negative input terminal of the integrated operational amplifier U1 is connected to a third resistor R3, and the other end of the third resistor R3 is grounded. The output terminal of the integrated operational amplifier U1 is connected to the tenth resistor R10, and the first and second output terminals of the tenth resistor R10 are respectively connected to two transistors, and the CP signal output terminal is placed between the two transistors. In this embodiment, the transistors are respectively an NPN transistor Q2 and a PNP transistor Q1, and the NPN transistor Q2 is connected in series with the PNP transistor Q1, one end of the NPN transistor Q2 is connected to the positive electrode of the power supply, and one end of the PNP transistor Q1 is connected to the negative electrode of the power supply to form a push-pull circuit. At the same time, due to the series connection between the two transistors, when the signal at the tenth resistor R10 is suddenly changed (i.e., there is a sharp pulse), the two transistors are connected in series to form a certain delay characteristic, and the CP signal output terminal will not be affected by the sharp pulse. The stability is affected.
[0017] After the PWM signal is input from the input end, it passes through the first capacitor C1 and the eighth resistor R8 in succession, reaches the positive input end of the integrated operational amplifier U1 for signal method, and passes through the tenth resistor R10 from the output end of the integrated operational amplifier U1. When the potential at the tenth resistor R10 reaches the bias voltage of the NPN transistor Q2, and the input voltage is positive, the NPN transistor Q2 is turned on and the PNP transistor Q1 is turned off. When the input voltage is negative, the NPN transistor Q2 is turned off and the PNP transistor Q1 is turned on. At the same time, the current after conduction is further amplified, thereby increasing the driving capability.
[0018] The negative input terminal of the integrated operational amplifier U1 is also connected to a third capacitor C3, the other end of the third capacitor C3 is connected to a sixth resistor R6 through a first diode D1, the second end of the sixth resistor R6 is respectively connected to a grounded second resistor R2 and a CP signal detection terminal, and a grounded second capacitor C2 is also connected between the CP signal detection terminal and the input terminal of the second resistor R2. The power interface of the integrated operational amplifier U1 is connected to a ±15V working voltage, the negative power interface of the integrated operational amplifier U1 is also connected to a fourth resistor R4, the other end of the fourth resistor R4 is connected to a fifth resistor R5 through the first capacitor C1 and the eighth resistor R8, and the other end of the fifth resistor R5 is connected to a 15V working voltage.
[0019] Finally, it should be noted that the terms “first”, “second” and “third” are only used for descriptive purposes with respect to the illustrations in the drawings of the specification and should not be understood as indicating or implying relative importance.
[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A new energy vehicle charging pile CP signal generation circuit, characterized in that: The invention comprises a positive input terminal of an integrated operational amplifier connected to a PWM signal input terminal, a negative input terminal of the integrated operational amplifier connected to a third resistor, an output terminal of the integrated operational amplifier connected to a tenth resistor, a first output terminal and a second output terminal of the tenth resistor connected to two transistors respectively, and a CP signal output terminal connected between the two transistors.
2. A new energy vehicle charging pile CP signal generating circuit as claimed in claim 1, characterized in that: The transistors are respectively an NPN transistor and a PNP transistor.
3. A new energy vehicle charging pile CP signal generating circuit as claimed in claim 2, characterized in that: The PWM signal is connected from the PWM signal input end to the positive input end of the integrated operational amplifier via the first capacitor and the eighth resistor respectively, and the negative input end of the integrated operational amplifier is connected to the third resistor connected to the ground.
4. A new energy vehicle charging pile CP signal generating circuit as claimed in claim 3, characterized in that: The negative input terminal of the integrated operational amplifier is also connected to a third capacitor, the other end of the third capacitor is connected to a sixth resistor through a first diode, the second end of the sixth resistor is respectively connected to a grounded second resistor and a CP signal detection terminal, and a grounded second capacitor is also connected between the CP signal detection terminal and the second resistor input terminal.
5. A new energy vehicle charging pile CP signal generating circuit as claimed in claim 4, characterized in that: The power supply interface of the integrated operational amplifier is connected to a ±15V operating voltage, and the negative power supply interface of the operational amplifier is also connected to a fourth resistor. The other end of the fourth resistor is connected to the fifth resistor through the first capacitor and the eighth resistor, and the other end of the fifth resistor is connected to the 15V operating voltage.