Direct current charging pile for electric vehicle

Abstract

The utility model discloses an electric vehicle DC charging pile, which comprises a main control board, an intelligent charger, a charging interface and a temperature sensor, the main control board is provided with a main control chip, a power supply module and a remote communication module, the main control chip comprises a reading module, the intelligent charger is a voltage-adjustable charger, the intelligent charger is connected with a power supply, and the temperature sensor is connected with the charging interface. The temperature sensor is a DS18B20 sensor, the charging interface comprises a male head installed at the output end of the intelligent charger and a female head installed at the input end of an electric vehicle battery, the male head and the female head each comprise a power supply end and an identification end, the identification end of the male head is electrically connected with the intelligent charger and the reading module, and the temperature sensor is electrically connected with the identification end of the female head. The reading module obtains battery information through connection of the male head identification end and the female head identification end. According to the utility model, the DS18B20 temperature sensor is connected with the reading module through the identification end, so that the main control chip and the intelligent charger can obtain the information of the rechargeable battery, the intelligent charger is charged by a user at an adaptive voltage, and the charging safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging piles and relates to a direct current charging pile for electric vehicles. Background Art

[0002] Electric vehicles are a common means of transportation, and a large number of charging piles need to be installed in densely populated areas such as residential areas or schools. When using the charging piles, car owners need to use their own chargers to plug directly into the charging sockets, or even connect multiple chargers through external socket strips, which is prone to danger during charging. Utility Model Content

[0003] In view of the above problems, the utility model proposes a DC charging pile for electric vehicles, which well solves the problems in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An electric vehicle DC charging pile, comprising:

[0006] A main control board, on which a main control chip, a power supply module, a prompt module and a remote communication module are arranged, the main control chip includes a reading module, and the power supply module, the remote communication module and the prompt module are electrically connected to the main control chip;

[0007] Smart charger: the smart charger is an adjustable voltage charger, and the smart charger is connected to the power supply;

[0008] The charging interface includes a male connector installed at the output end of the smart charger and a female connector installed at the input end of the electric vehicle battery. Both the male connector and the female connector include a power supply end and an identification end. The male connector identification end is electrically connected to the smart charger and the reading module.

[0009] Temperature sensor, the temperature sensor is a DS18B20 sensor, the temperature sensor is electrically connected to the female head identification end, and the reading module obtains battery information through the male and female head identification ends;

[0010] Among them, the power supply module includes an AC-DC module, the input end of the AC-DC module is used to connect to the power supply, the output end of the AC-DC module provides 5V power supply on the main control board, and the output end of the AC-DC module is electrically connected to the DC-DC isolation module.

[0011] Optionally, the remote communication module is a 4G-CAT1 module.

[0012] Optionally, the DC-DC isolation module includes an isolation power supply module and a 485 serial port module, the 485 serial port module includes a digital isolation chip and a 485 chip, and the 485 serial port module is electrically connected to the smart charger, the charging interface and the main control chip.

[0013] Optionally, the prompt module includes an indicator light, and the indicator light indicates different charging states through different colors.

[0014] Optionally, the prompt module includes a power amplifier module, the power amplifier module is located on the main control board, and the power amplifier module on the main control board is electrically connected to a speaker.

[0015] Optionally, the remote communication module is powered by a switching power supply chip XL1509-ADJE1 with a regulated 8V voltage.

[0016] Optionally, the main control chip is powered by a power chip AMS1117-3V3 with a 3V voltage regulator.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The S18B20 temperature sensor connects to the reading module through the identification end, so that the main control chip and the smart charger can obtain the information of the rechargeable battery, and then obtain the user's authority and charging requirements by matching the user information input by the remote communication module, so that the smart charger can charge the user with the voltage adapted to improve the safety of charging and reduce the inconvenience of users carrying chargers. At the same time, the main control chip reads and matches the user information from the DS18B20 temperature sensor for charging, reducing the occurrence of uncivilized phenomena such as freeloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall framework of an embodiment of the utility model;

[0020] Figure 2 It is a partial circuit diagram of the temperature sensor of the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the circuit of the charging interface of an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of a 5V power supply circuit of an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the circuit of the main control chip of the embodiment of the utility model;

[0024] Figure 6 It is a partial circuit diagram of a remote communication module of an embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the isolated power supply circuit of an embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the 485 serial port circuit of an embodiment of the utility model;

[0027] Fig. 9 This is a schematic diagram of the circuit of the indicator light of an embodiment of the utility model;

[0028] Fig.10 It is a partial circuit diagram of a power amplifier module of an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1 , is a DC charging pile for electric vehicles disclosed in an embodiment of the utility model, including a main control board, an intelligent charger, a charging interface and a temperature sensor. The main control board is provided with a main control chip, a power supply module, a remote communication module and a prompt module. The main control chip includes a reading module. The remote communication module, the power supply module and the prompt module are electrically connected to the main control chip. The intelligent charger is an adjustable voltage charger. The intelligent charger is connected to the power supply. The temperature sensor is a DS18B20 sensor. The charging interface includes a male head installed at the output end of the intelligent charger and a female head at the input end of the battery of the electric vehicle. Both the male head and the female head include a power supply end and an identification end. The male head identification end is electrically connected to the intelligent charger and the reading module. The temperature sensor is electrically connected to the female head identification end. The reading module obtains battery information through the male and female head identification ends. Among them, the power supply module includes an AC-DC module. The input end of the AC-DC module is used to connect to the power supply. The output end of the AC-DC module provides 5V power supply on the main control board. The output end of the AC-DC module is electrically connected to a DC-DC isolation module.

[0031] For more details, see Figure 1-3 A charging interface female head with an identification terminal and a DS18B20 temperature sensor are set at the battery end of the electric vehicle. The battery information is set in the EEPROM storage of the DS18B20 temperature sensor. The reading module of the main control chip and the smart charger connect to the temperature sensor through the identification terminal and read the battery information. The battery information is fed back to the smart charger through the main control chip. The smart charger adjusts to the appropriate voltage to charge the vehicle. A remote communication module is connected to the main control chip, and the charging battery information is input to the charging pile through the remote communication module. The charging pile adapts the battery information to confirm the charging authority and charging requirements.

[0032] In this way, the DS18B20 temperature sensor connects to the reading module through the identification end, so that the main control chip and the smart charger can obtain the information of the rechargeable battery, and then obtain the user's authority and charging requirements by matching the user information input by the remote communication module, so that the smart charger can charge the user with the voltage adapted to improve the safety of charging and reduce the inconvenience of users carrying chargers. At the same time, the main control chip reads and matches the user information from the DS18B20 temperature sensor for charging, reducing the occurrence of uncivilized phenomena such as freeloading.

[0033] For some possible approaches, see Figure 4 The power supply module completes the conversion from AC to DC through the 220V power supply input AC-DC module, and provides 5V power to the module on the main control board. At the same time, the 220V power supply inputs the smart charger to charge the lithium battery through the smart charger. The AC-DC module is electrically connected to the DC-DC isolation module to achieve isolation between strong and weak electricity and protect the circuit.

[0034] The main control chip uses STM32G030F6P6 microcontroller, please refer to Figure 5 It uses the power chip AMS1117-3V3 to provide a 3V regulated power supply, and the charging interface adopts the national standard 2+4 structure, which includes two power input interfaces and four communication interfaces, namely the power supply end and the identification end.

[0035] The AC-DC module, DC-DC isolation module and smart charger are all existing technologies and will not be described in detail here.

[0036] As a specific implementation of an electric vehicle DC charging pile provided in the application, the remote communication module is a 4G-CAT1 module.

[0037] It should be understood that by setting up a 4G-CAT1 module, the charging pile can be provided with full network access and multi-band communication based on the SIM card to adapt to different usage environments.

[0038] In some feasible ways, the 4G-CAT1 module uses the EC800MCN-GA control chip and adopts the OPEN-MCU development method to complete the task scheduling of the main control chip, battery ID information monitoring, and remote upgrade of the charging pile system in the later stage through the 4G-CAT1 module. Figure 6 , the 4G-CAT1 module uses the switching power supply chip XL1509-ADJE1 to provide a regulated 8V power supply.

[0039] As a specific implementation of an electric vehicle DC charging pile provided in the application, the DC-DC isolation module includes an isolation power supply module and a 485 serial port module, the 485 serial port module includes a digital isolation chip and a 485 chip, and the 485 serial port module is electrically connected to the smart charger, the charging interface and the main control chip.

[0040] It should be understood that by setting up a 485 serial port module to connect the smart charger, the charging interface and the main control chip, the smart charger can complete communication through the 485 modbus communication protocol and control the output DC voltage and current.

[0041] For some possible approaches, see Figure 7 , the isolated power supply module uses B0505S-1WR3, please refer to Figure 8 The digital isolation chip and 485 chip use π131U31 and SIT3088EESA respectively.

[0042] As another specific implementation of an electric vehicle DC charging pile provided in the application, the prompt module includes an indicator light, and the indicator light indicates different charging states through different colors.

[0043] In combination with specific usage scenarios, indicator lights are set to display different status through lights of different colors. For example, when the charging pile is idle, the status indicator shows red standby, and when the charging pile is charging, the green light is always on. When the equipment fails, such as abnormal charger communication or battery ID communication, the red indicator light flashes to prompt.

[0044] Furthermore, the prompt module includes a power amplifier module, which is located on the main control board, and the power amplifier module on the main control board is electrically connected to a speaker.

[0045] It should be understood that by providing a power amplifier module and a speaker, voice prompts and reminders can be given to users using the charging pile.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC charging pile for electric vehicles, characterized in that: include: A main control board, on which a main control chip, a power supply module, a prompt module and a remote communication module are arranged, the main control chip includes a reading module, and the power supply module, the remote communication module and the prompt module are electrically connected to the main control chip; A smart charger, wherein the smart charger is an adjustable voltage charger, and the smart charger is connected to a power supply; A charging interface, the charging interface comprising a male connector installed at the output end of the smart charger and a female connector at the input end of the electric vehicle battery, the male connector and the female connector both comprising a power supply end and an identification end, the male connector identification end electrically connecting the smart charger and the reading module; A temperature sensor, wherein the temperature sensor is a DS18B20 sensor, the temperature sensor is electrically connected to the female head identification end, and the reading module obtains battery information through the male and female head identification ends; Among them, the power supply module includes an AC-DC module, the input end of the AC-DC module is used to connect to the power supply, the output end of the AC-DC module provides 5V power supply on the main control board, and the output end of the AC-DC module is electrically connected to a DC-DC isolation module.

2. The electric vehicle DC charging pile according to claim 1, characterized in that: The remote communication module is a 4G-CAT1 module.

3. The electric vehicle DC charging pile according to claim 1, characterized in that: The DC-DC isolation module includes an isolation power supply module and a 485 serial port module. The 485 serial port module includes a digital isolation chip and a 485 chip. The 485 serial port module is electrically connected to the smart charger, the charging interface and the main control chip.

4. The electric vehicle DC charging pile according to claim 1, characterized in that: The prompt module includes an indicator light, and the indicator light indicates different charging states through different colors.

5. The electric vehicle DC charging pile according to claim 4, characterized in that: The prompt module includes a power amplifier module, the power amplifier module is located on the main control board, and the main control board power amplifier module is electrically connected to a speaker.

6. The electric vehicle DC charging pile according to claim 2, characterized in that: The remote communication module is powered by a switching power supply chip XL1509-ADJE1 with a regulated 8V voltage.

7. The electric vehicle DC charging pile according to claim 1, characterized in that: The main control chip adopts the power chip AMS1117-3V3 to provide 3V stable power supply.

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