A system for charging cars using a charger compatible with car charging stations.

Abstract

This utility model relates to a system for charging electric vehicles using a charger compatible with charging piles, comprising: a switching power supply module for converting input AC power into DC power adapted to the battery; and a signal control module electrically connected to the switching power supply module, including: a CC signal detection unit for detecting the closed state of the mechanical switch S3 of the charging gun head, and determining the integrity of the connection by measuring the resistance value of the CC pin to ground; and a CP signal interaction unit for interacting with the charging pile via PWM signals, adjusting the voltage of the CP pin through a voltage divider resistor network, and triggering the output of the charging pile's main circuit. By adding a signal control module inside the charger, it simulates the CC / CP signal interaction logic of an electric vehicle, causing the charging pile to mistakenly identify as a legitimate load, thereby outputting AC power to the switching power supply module for DC conversion. This not only expands the application scenarios of the charger but also ensures the stability and safety of the battery charging process.

Description

Technical Field

[0001] This utility model relates to the field of battery charger technology, and in particular to a system for charging vehicles using a charger compatible with car charging stations. Background Technology

[0002] Chargers need to meet the needs of multiple usage scenarios, not only for connecting to AC power but also for connecting to car charging stations. Existing battery chargers only support AC power input and cannot be directly used with car charging stations. This is because charging stations require the detection of CC / CP signals (compliant with GB / T 18487.1 standard) before allowing current output, and ordinary chargers lack signal simulation capabilities. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a system that allows a charger to be compatible with car charging stations. This system is a hardware structure improvement solution that adds a signal control module inside the charger to simulate the CC / CP signal interaction logic of an electric vehicle. This causes the charging station to be mistakenly identified as a legitimate load, thereby outputting AC power to the switching power supply module for DC conversion. This not only expands the application scenarios of the charger but also ensures the stability and safety of the battery charging process.

[0004] The above-mentioned utility model objective is achieved through the following technical solution:

[0005] A system for charging vehicles using a charger compatible with a car charging station includes:

[0006] A switching power supply module is used to convert input AC power into DC power adapted to the battery;

[0007] A signal control module, electrically connected to the switching power supply module, includes:

[0008] The CC signal detection unit is used to detect the closed state of the mechanical switch S3 of the charging gun head and to determine the integrity of the connection by measuring the resistance value of the CC pin to ground.

[0009] The CP signal interaction unit is used to interact with the charging pile via PWM signals. It adjusts the voltage of the CP pin through a voltage divider resistor network to trigger the output of the charging pile's main circuit.

[0010] As a further technical solution of this utility model: the CC signal detection unit includes a grounding resistor RC. When the mechanical switch S3 is closed, the resistance value of the CC pin to ground is RC, and when it is not closed, it is an RC series resistor R3.

[0011] As a further technical solution of this utility model: the CP signal interaction unit includes voltage divider resistors R1 and R2 and MOS transistor S2;

[0012] The initial voltage of the CP pin is 12V;

[0013] After connecting the charger, the voltage divider R1 / R2 causes the CP voltage to drop to 9V;

[0014] After the charging pile outputs a 9V PWM signal, it closes S2 to reduce the CP voltage to 6V, triggering the charging pile to close the main relays K1 and K2.

[0015] As a further technical solution of this utility model: the duty cycle of the PWM signal determines the output current of the charging pile, and the range is dynamically adjusted by the charger controller.

[0016] As a further technical solution of this utility model: the power supply of the charging pile must simultaneously meet the following requirements: the resistance value of the CC pin is RC and the CP pin is a 6V PWM signal.

[0017] In summary, this utility model has at least one of the following beneficial technical effects:

[0018] This utility model discloses a system for charging electric vehicles using a charger compatible with charging piles, belonging to the field of battery charging technology. The system includes a switching power supply module and a signal control module. The signal control module consists of a CC signal detection unit and a CP signal interaction unit. The CC signal detection unit determines the integrity of the connection by measuring the resistance (RC) of the CC pin to ground on the charging gun head. The CP signal interaction unit achieves a step change in the CP pin voltage (12V→9V→6V) through a voltage divider resistor network (R1, R2) and a MOSFET S2, and analyzes the PWM duty cycle to set the output current. Its innovation lies in simulating the CC / CP signal interaction logic of an electric vehicle through hardware circuitry, enabling the charging pile to recognize the charger as a legitimate load, thus simultaneously supporting both mains power and charging pile power supply. This structure solves the problem that ordinary chargers cannot trigger the charging pile output, expands the application scenarios, and the dual signal verification mechanism ensures charging safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the charging pile and charging gun head of this utility model.

[0021] Figure 3 This is a schematic diagram of the internal components of the charger and the communication part of the charging pile of this utility model. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Example 1:

[0026] Reference Figure 1-3 This utility model discloses a system for charging a car charging station compatible with a charger, comprising: a switching power supply module for converting input AC power into DC power adapted to the battery; and a signal control module electrically connected to the switching power supply module, including: a CC signal detection unit for detecting the closed state of the mechanical switch S3 of the charging gun head and determining the integrity of the connection by measuring the resistance value of the CC pin to ground; and a CP signal interaction unit for interacting with the charging station via PWM signals, adjusting the voltage of the CP pin through a voltage divider resistor network, and triggering the output of the main circuit of the charging station.

[0027] This system first checks if the charging pile plug and charger socket are fully connected. Then, it determines whether to supply power to the charger and sets the power supply current by detecting the voltage and duty cycle. Unlike ordinary chargers that can only use AC power, this system can connect to car charging piles. When designing battery chargers, the usage scenario is a critical parameter. For a charging pile to output AC power, it needs to detect the CC and CP signals on the charging gun head. The charging pile will only output power when certain conditions are met; simply connecting L, N, and PE will not output power. Therefore, corresponding circuitry needs to be added to the charger to meet the charging pile's detection of CC and CP signals. This design not only expands the charger's usage scenarios but also ensures the stability and safety of the battery charging process.

[0028] The CC signal detection unit includes a grounding resistor RC. When the mechanical switch S3 is closed, the resistance of the CC pin to ground is RC; when it is not closed, it is RC in series with resistor R3. The CC pin is used to detect the resistance value of this pin to ground to determine whether the mechanical switch S3 on the charging head is fully closed. When fully closed, the resistance of CC to ground is RC; when the mechanical switch is not closed, the resistance of CC to ground is RC plus R3. The charging pile main circuit will only output when fully closed.

[0029] The CP signal interaction unit includes voltage divider resistors R1 and R2 and MOSFET S2; initially, the CP pin voltage is 12V; after connecting the charger, the voltage divider R1 / R2 reduces the CP voltage to 9V; after the charging pile outputs a 9V PWM signal, S2 is closed, reducing the CP voltage to 6V, triggering the charging pile to close the main relays K1 and K2.

[0030] The CP signal is used to detect the voltage value of this pin relative to ground. When the charger is not connected, the initial voltage of the CP pin is 12V. After the charger is connected, the voltage is divided by a voltage divider resistor, and the voltage of the CP pin is 9V. At this time, the S1 switch inside the charging pile is connected to the PWM signal source inside the charging pile, and the CP pin becomes a PWM signal with an amplitude of 9V. After the charger detects this PWM signal, it closes the MOSFET S2. The switch closure causes the voltage divider resistor under the CP pin to decrease, and the CP pin becomes a PWM signal with an amplitude of 6V. At this point, the system considers the signal detection to be complete, and the main circuit can output power. The charging pile closes the K1 and K2 switches on the internal main circuit, and the charging pile supplies power to the charger. At the same time, the duty cycle of the PWM signal determines the magnitude of the charging pile's output current.

[0031] The duty cycle of the PWM signal determines the output current of the charging pile, and the range is dynamically adjusted by the charger controller. The charging pile power supply must simultaneously meet the following requirements: the CC pin resistance is RC and the CP pin provides a 6V PWM signal.

[0032] The charging process requires both CC and CP signals to be met simultaneously before the charging station supplies power to the charger. Both conditions are indispensable, ensuring charging safety. Compared to existing technologies, this invention expands the charger's application scenarios, simultaneously supporting both mains power and car charging station power, bringing convenience to users.

[0033] The specific working steps of this utility model are divided into the following stages:

[0034] The charging gun head is not connected to the charger: At this time, the CC pin switch S3 is open and the CC pin is floating; the CP pin is connected to the internal 12V source and the CP voltage is 12V.

[0035] When the charging gun head is connected to the charger: At this time, the CC pin is connected to the charger, switch S3 is closed, and the charger detects that the resistance of the CC pin to ground is RC; after the CP signal is connected to the charger, it becomes a voltage divider of R1 and R2, which is 9V. At this time, the internal switch S1 of the charger is connected to the internal PWM signal source, and CP becomes a PWM signal with an amplitude of 9V. The duty cycle of the PWM signal determines the current output of the charging pile. After the charger controller detects that the CP signal is a PWM signal with an amplitude of 9V, it closes the internal switch S2 of the charger, causing the CP signal to become a PWM signal with an amplitude of 6V. After the charging pile detects that the CP signal is a PWM signal with an amplitude of 6V, it assumes that all detections are completed, closes the K1 and K2 switches on the main circuit of the charging pile, and the charging pile supplies power to the charger, and the charger charges the battery.

[0036] Battery fully charged: The battery voltage detection circuit inside the charger detects that the battery voltage is fully charged, disconnects the internal switch S2 of the charger, and the CP signal becomes a PWM signal with an amplitude of 9V. After the charging pile detects this signal, it disconnects the main circuit switches K1 and K2, and the charging pile stops supplying power to the charger. At the same time, the internal switch S1 of the charging pile is connected to the 12V source, the mechanical switch S3 is turned on, the charging gun head is pulled out, and the charging is completed.

[0037] The implementation principle of this utility model is as follows: This utility model discloses a system for charging electric vehicles using a charger compatible with charging piles, belonging to the field of battery charging technology. The system includes a switching power supply module and a signal control module; the signal control module consists of a CC signal detection unit and a CP signal interaction unit. The CC signal detection unit determines the integrity of the connection by measuring the resistance (RC) of the CC pin to ground on the charging gun head; the CP signal interaction unit achieves a step change in the CP pin voltage (12V→9V→6V) through a voltage divider resistor network (R1, R2) and a MOSFET S2, and analyzes the PWM duty cycle to set the output current. Its innovation lies in simulating the CC / CP signal interaction logic of an electric vehicle through hardware circuitry, enabling the charging pile to recognize the charger as a legitimate load, thus simultaneously supporting both mains power and charging pile power supply. This structure solves the problem that ordinary chargers cannot trigger the charging pile output, expands the application scenarios, and the dual signal verification mechanism ensures charging safety.

[0038] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A system for charging vehicles using a charger compatible with car charging stations, characterized in that, include: A switching power supply module is used to convert input AC power into DC power adapted to the battery; A signal control module, electrically connected to the switching power supply module, includes: The CC signal detection unit is used to detect the closed state of the mechanical switch S3 of the charging gun head and to determine the integrity of the connection by measuring the resistance value of the CC pin to ground. The CP signal interaction unit is used to interact with the charging pile via PWM signals. It adjusts the voltage of the CP pin through a voltage divider resistor network to trigger the output of the charging pile's main circuit.

2. The system of claim 1, wherein the charger is a charger compatible with a vehicle charging station. The CC signal detection unit includes a grounding resistor RC. When the mechanical switch S3 is closed, the resistance value of the CC pin to ground is RC, and when it is not closed, it is an RC series resistor R3.

3. The system of claim 1, wherein the charger is a charger compatible with a vehicle charging station. The CP signal interaction unit includes voltage divider resistors R1 and R2 and a MOSFET S2; The initial voltage of the CP pin is 12V; After connecting the charger, the voltage divider R1 / R2 causes the CP voltage to drop to 9V; After the charging pile outputs a 9V PWM signal, it closes S2 to reduce the CP voltage to 6V, triggering the charging pile to close the main relays K1 and K2.

4. The system of claim 1, wherein the charger is a charger compatible with a vehicle charging station. The duty cycle of the PWM signal determines the output current of the charging pile, and the range is dynamically adjusted by the charger controller.

5. A system for charging vehicles using a charger compatible with a charging station according to any one of claims 1-4, characterized in that, The power supply for the charging pile must simultaneously meet the following requirements: the resistance value of the CC pin is RC and the CP pin is a 6V PWM signal.

Images