A new energy automobile charging control device

Abstract

A new energy automobile charging control device, including controller, the controller includes charging protocol interaction module and switch trigger module;The charging protocol interaction module is used for interacting charging control signal with vehicle controller according to national standard charging protocol;The switch trigger module is used for controlling the on-off of the vehicle-mounted charger and the charging power supply;It also includes contactor, the contactor is connected with the switch trigger module for realizing the on-off of the charging power supply and the vehicle-mounted charger;The contactor includes self-locking mechanism connected with the switch trigger module.This application uses electronic switch to control the contactor self-locking in the way of point operation to realize the on-off of the charging power supply of new energy automobile alternating current charging pile, instead of PCB board-mounted large current relay, and enhances the use reliability of charging equipment, and the application also provides a compatible machine mode that the charging pile can freely select component assembly.

Description

Technical Field

[0001] This application relates to the field of new energy vehicles, and in particular to the field of new energy vehicle charging pile technology. Background Technology

[0002] Currently, most AC charging piles use relays mounted on PCBs to switch the live and neutral wires of the car charging power supply. However, relays are not suitable for high-current applications above 10A, especially for the popular 7KW power of home AC charging piles, whose 32A current is unsuitable for using relays on the PCB as switching devices. Contactors are the preferred high-current switching devices, capable of withstanding frequent high-power load switching operations and providing overload, short-circuit, and undervoltage protection. Furthermore, using PCB-mounted relays to continuously control the charging power supply results in the relay coil generating heat over a long period, leading to overheating, accelerated aging, reduced reliability, and potential safety hazards. Contactors are more reliable than relays in terms of continuous energization. Designed specifically for high-current switching, contactors have undergone 60 years of development and four generations of upgrades in China, and their reliability and durability have been widely proven. In particular, the self-locking mechanism of contactors makes them more reliable than continuous current control via PCBs.

[0003] On the other hand, current AC charging stations are delivered as complete units, with a single PCB board integrating charging protocol control, power on / off control, leakage detection, and many other functions. This is not suitable for ordinary users to purchase parts and assemble themselves, and repairs are also very troublesome if a fault occurs. Personal computer OEMs allow ordinary users to choose the quality and price of computer components by purchasing and assembling them individually, similarly, ordinary users would prefer to purchase individual components and assemble the charging station themselves, just like with PC OEMs. Summary of the Invention

[0004] In view of the above technical background, the purpose of this application is to provide a new energy vehicle charging control device, which uses a contactor separate from the PCB board as the power supply switching component, and controls the contactor to self-lock energize by means of onboard relay jogging, thereby increasing the reliability of the charging pile and realizing a compatible machine mode in which the charging pile can freely select components for assembly. To achieve this objective, the technical solution of this application is as follows.

[0005] A new energy vehicle charging control device includes a controller, which comprises a charging protocol interaction module and a switch triggering module. The charging protocol interaction module is used to interact with the vehicle controller to exchange charging control signals according to the charging protocol. The switch triggering module is used to control the connection and disconnection between the on-board charger and the charging power supply. The switch triggering module includes a normally open electronic switch and a normally closed electronic switch. The normally open electronic switch is used to control the connection between the charging power supply and the on-board charger in a jogging manner. The normally closed electronic switch is used to control the disconnection between the charging power supply and the on-board charger in a jogging manner.

[0006] Optionally, a contactor is included, which is connected to a switch trigger module to realize the switching between the charging power supply and the on-board charger; the contactor includes a self-locking mechanism connected to the switch trigger module.

[0007] Optionally, the self-locking mechanism includes a normally open auxiliary mechanism, which includes a 13NO common terminal and a 14NO normally open terminal; the normally closed electronic switch includes a normally closed relay, and the normally open electronic switch includes a normally open relay; the A1 contact of the contactor coil is connected to the live wire, and the A2 contact is connected to the 14NO normally open terminal; the common pin of the normally closed relay is connected to the neutral wire, and its NC normally closed pin is connected to the 13NO common terminal; the common pin of the normally open relay is connected to the NC normally closed pin of the normally closed relay, and its NO normally open pin is connected to the A2 contact and the 14NO normally open terminal.

[0008] Optionally, the controller includes a power detection module, which is connected to the normally open pin 14NO of the contactor, i.e., the normally open pin NO of the normally open relay, and is used to detect the on / off status of the contactor to coordinate with the jogging control of the normally closed relay and the normally open relay.

[0009] Optional components include one or more of the following: a charging gun conforming to national standards, a controller, a contactor, a residual current device (RCD), a universal rail, and a universal housing; the L and N lines of the charging gun are connected to the contactor, and the PE and CP lines of the charging gun are connected to the charging protocol interaction module; the universal rail is used to install the controller, contactor, and RCD.

[0010] This application employs an electronic switch to control the contactor's self-locking mechanism via jogging to switch the charging power supply of the AC charging pile for new energy vehicles on and off, replacing the high-current relay on the PCB board and enhancing the reliability of the charging equipment. This application also provides a separate design for the main components of the charging equipment, allowing for installation on a universal rail, increasing the diversity of main component selection to achieve a compatible charging pile assembly mode where components can be freely chosen.

[0011] The present application and its working principle are further explained below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a circuit and structural view of an embodiment of this application; Figure 2 This is a structural view of an embodiment of this application. Detailed Implementation

[0013] This embodiment discloses a new energy vehicle charging control device, such as... Figure 1 and Figure 2 As shown, the system includes a controller 1, which includes a charging protocol interaction module 2 and a switch triggering module 3. The charging protocol interaction module 2 is used to interact with the vehicle controller to exchange charging control signals according to the national standard charging protocol. The switch triggering module 3 is used to control the on-board charger and the charging power supply.

[0014] In this embodiment, the switch trigger module 3 includes a normally closed relay 4 and a normally open relay 5; the normally open relay 5 is used to control the connection between the charging power supply and the on-board charger in a jogging manner; the normally closed relay 4 is used to control the disconnection between the charging power supply and the on-board charger in a jogging manner.

[0015] This embodiment discloses a new energy vehicle charging control device including a contactor 6, which is connected to a switch trigger module 3 to realize the connection and disconnection between the charging power supply and the on-board charger.

[0016] The new energy vehicle charging control device disclosed in this embodiment also includes a charging gun 7 conforming to national standards, a leakage current protector 8, a universal guide rail 9, and a universal distribution box 10. Together with the controller 1 and the contactor 6, it forms a new energy vehicle AC charging pile that can charge new energy vehicles. The universal guide rail 9 is fixed inside the universal distribution box 10, and the controller 1, the contactor 6, and the leakage current protector 8 are connected and fixed to the universal guide rail 9.

[0017] In this embodiment, after the AC power supply passes through the leakage current protector 8, its L live wire 11 and N neutral wire 12 are respectively connected to the 1L1 contact 13 and 3L2 contact 14 of the contactor 6; the L wire and N wire of the charging gun 7 are respectively connected to the 2T1 contact 15 and 4T2 contact 16 of the contactor 6. The PE wire 19 and CP wire 20 of the charging gun are respectively connected to the PE contact 32 and CP contact 31 of the charging protocol interaction module 2.

[0018] In this embodiment, the contactor 6 includes a self-locking mechanism, which includes a normally open auxiliary mechanism. The normally open auxiliary mechanism includes a 13NO common terminal 21 and a 14NO normally open terminal 22. The A1 contact 23 of the contactor coil is connected to the L live wire 11, and the A2 contact 24 is connected to the 14NO normally open terminal 22. The power contact 33 of the controller 1 is connected to the L live wire 11. The COM1 common pin 25 of the normally closed relay 4 is connected to the N neutral wire 12, and its NC normally closed pin 26 is connected to the 13NO common terminal 21. The COM2 common pin 27 of the normally open relay 5 is connected to the NC normally closed pin 26 of the normally closed relay 4, and its NO normally open pin 28 is connected to the A2 contact 24 and the 14NO normally open terminal 22.

[0019] This embodiment discloses a new energy vehicle charging control device including a power detection module 29. The detection point 30 of the power detection module 29 is connected to the normally open terminal 22 of the contactor 14NO, which is equivalent to the detection point 30 also being connected to the normally open pin 28 of the normally open relay NO. The power detection module is used to detect the on / off status of the contactor to cooperate with the jogging control of the normally closed electronic switch and the normally open electronic switch.

[0020] In this embodiment, when the charging gun 7 is inserted into the charging socket of the new energy vehicle, after the charging protocol interaction module 2 correctly interacts with the vehicle controller to exchange charging signals according to the national standard, the switch trigger module 3 controls the coil of the normally open relay 5 to be energized and engaged. The COM2 common pin 27 and the NO normally open pin 28 are connected, so that the A2 contact 24 of the contactor 6 coil is connected to the N neutral line 12. Then the contactor 6 coil is energized, so that the 13NO common terminal 21 and the 14NO normally open terminal 22 are connected, the 1L1 contact 13 and the 2T1 contact 15 are connected, and the 3L2 contact 14 and the 4T2 contact 16 are connected. That is, the on-board charger is connected to the charging power supply and charging begins. At this time, the power detection module 29 detects... If the detection point 30 is found to be connected to the L live wire, it is determined that the contactor 6 is in the energized state. Then, the switch trigger module 3 controls the normally open relay 5 coil to be de-energized, and the COM2 common pin 27 and the NO normally open pin 28 are disconnected. Since the 13 NO common terminal 21 and the 14 NO normally open terminal 22 remain connected, even though the COM2 common pin 27 and the NO normally open pin 28 are disconnected, the A2 contact 24 and the N neutral wire 12 are still connected, so that the coil of the contactor 6 continues to be energized. This process is a momentary control, that is, the normally open relay 5 coil only needs to be energized for less than 1 second to keep the coil of the contactor 6 energized, thereby keeping the on-board charger and the charging power supply connected.

[0021] In this embodiment, when the charging protocol interaction module 2 confirms that charging is finished, the switch trigger module 3 controls the coil of the normally closed relay 4 to be energized and engaged. The COM1 common pin 25 and NC normally closed pin 26 of the normally closed relay 4 are disconnected, causing the A2 contact 24 to be disconnected from the N neutral line 12. The coil of the contactor 6 is de-energized, causing the 13NO common terminal 21 and 14NO normally open terminal 22 to be disconnected, the 1L1 contact 13 and 2T1 contact 15 to be disconnected, and the 3L2 contact 14 and 4T2 contact 16 to be disconnected. The on-board charger and the charging power supply are cut off and charging cannot be performed. At this time, the power detection module 29 detects that the detection point 30 is disconnected from the L live wire, that is, it determines that the contactor 6 is in the disconnected state. Then, the switch trigger module 3 controls the normally closed relay 4 coil to de-energize, so that the COM1 common pin 25 and the NC normally closed pin 26 are closed. Since the 13NO common terminal 21 and the 14NO normally open terminal 22 are already disconnected, and the COM2 common pin 27 and the NO normally open pin 28 of the normally open relay 5 are also in the disconnected state, although the COM1 common pin 25 and the NC normally closed pin 26 are connected, the A2 contact 24 and the N neutral wire 12 are still in the disconnected state, so that the coil of the contactor 6 is continuously de-energized and maintains the disconnected state. This process is also a momentary control, that is, the coil of the normally closed relay 4 is energized for less than 1 second to keep the coil of the contactor 6 continuously de-energized, thereby ensuring that the on-board charger and the charging power supply are disconnected.

[0022] In this embodiment, it should be noted that the other two contacts 5L3 and 6T3 of the contactor 6 have the same effect on self-locking control and on the 13NO common terminal 21 and the 14NO normally open terminal 22. That is, replacing the 13NO common terminal 21 with the 5L3 contact and replacing the 14NO normally open terminal 22 with the 6T3 contact is also a technical solution of this embodiment.

[0023] In this embodiment, a relay is used to control the contactor's self-locking engagement via a momentary action to switch the charging power supply of the AC charging pile for new energy vehicles on and off, replacing the high-current relay on the PCB board. This enhances the reliability of the charging pile and further protects the electrical safety of the equipment. It also provides a separate design for the main components of the charging pile and allows for installation on a universal rail, increasing the diversity of main component options and enabling a compatible assembly mode where users can freely choose which components to assemble. Because a universal electrical mounting rail is used, maintenance and replacement of parts are more convenient and cost-effective, and functional expansion is easily achieved. For example, to add surge protectors, electricity metering, or other functions, universal parts can be purchased and installed on a universal rail, ensuring good compatibility and allowing users to assemble charging piles like assembling a computer.

[0024] The national standard mentioned in this embodiment refers to Chinese standard GB / T 18487.1-2023 Electric Vehicle Conductive Charging System Part 1: General Requirements, and other relevant national standards. This embodiment is accompanied by... Figure 1This is not a complete circuit diagram, but a schematic diagram of the circuit principle, used to help understand the technical solution of this embodiment. (See attached diagram.) Figure 1 Based on this, those skilled in the art can derive a complete circuit schematic and implement this embodiment.

[0025] The above provides a detailed description of a new energy vehicle charging control device provided by this utility model. The description of the above embodiments is only for the purpose of helping to understand the core design concept of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the principles of this application. Therefore, the content of this specification should not be construed as a limitation of the invention.

Claims

1. A charging control device for new energy vehicles, characterized in that: The system includes a controller, which comprises a charging protocol interaction module and a switch triggering module. The charging protocol interaction module is used to interact with the vehicle controller to exchange charging control signals according to the charging protocol; the switch triggering module is used to control the connection and disconnection between the on-board charger and the charging power supply; the switch triggering module includes a normally open electronic switch and a normally closed electronic switch; the normally open electronic switch is used to control the connection between the charging power supply and the on-board charger in a jogging manner; the normally closed electronic switch is used to control the connection between the charging power supply and the on-board charger in a jogging manner.

2. The new energy vehicle charging control device as described in claim 1, characterized in that: The device includes a contactor connected to the switch triggering module for switching the charging power supply on and off with the on-board charger; the contactor includes a self-locking mechanism connected to the switch triggering module.

3. The new energy vehicle charging control device as described in claim 2, characterized in that: The self-locking mechanism includes a normally open auxiliary mechanism, which includes a 13NO common terminal and a 14NO normally open terminal; the normally closed electronic switch includes a normally closed relay, and the normally open electronic switch includes a normally open relay; the A1 contact of the contactor coil is connected to the live power wire, and the A2 contact is connected to the 14NO normally open terminal; the common pin of the normally closed relay is connected to the neutral power wire, and its NC normally closed pin is connected to the 13NO common terminal; the common pin of the normally open relay is connected to the NC normally closed pin of the normally closed relay, and its NO normally open pin is connected to the A2 contact and the 14NO normally open terminal.

4. The new energy vehicle charging control device as described in claim 3, characterized in that: The controller includes a power detection module connected to the 14NO normally open terminal, used to detect the on / off status of the contactor to coordinate with the jog control of the normally closed relay and the normally open relay.

5. A new energy vehicle charging control device as described in any one of claims 1-4, characterized in that: It includes one or more of the following: a charging gun conforming to national standards, a controller, a contactor, a leakage current protector, a universal rail, and a universal housing; the L and N lines of the charging gun are connected to the contactor, and the PE and CP lines of the charging gun are connected to the charging protocol interaction module; the universal rail is used to install the controller, the contactor, and the leakage current protector.

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