CN211942988U

CN211942988U - Bluetooth control automatic charger

Info

Publication number: CN211942988U
Application number: CN202020328744.7U
Authority: CN
Inventors: 沈玺; 罗洪燕
Original assignee: Chongqing Terminus Technology Co Ltd
Current assignee: Chongqing Terminus Technology Co Ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-11-17
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a bluetooth control automatic charger, including the control unit and power module, the control unit includes host system and bluetooth module, host system is STM32F103 singlechip, STM32F103 singlechip is connected to bluetooth module, power module includes power supply circuit and power module circuit. The utility model takes STM32F103 as a main control chip, and takes a chip power supply circuit and an operational amplification power supply circuit as power supply conversion hardware circuits, so that the utility model can adjust the charging voltage and the charging current, has wireless transmission function, can perform data interaction with equipment with Bluetooth matching end such as mobile phone, and is convenient for controlling charging; the charging system can automatically power off when charging is finished, and can send information to equipment such as a mobile phone and the like at a Bluetooth matching end to remind a user of timely powering off and taking a car.

Description

Bluetooth control automatic charger

Technical Field

The utility model relates to a battery charging field, in particular to automatic charger of bluetooth control.

Background

With the progress of the technical development, electric vehicles are popularized, and electric bicycles are developed rapidly due to the national conditions and low cost performance. At present, the use of electric bicycles in colleges and universities is particularly outstanding, but because the electric charging equipment is limited in the campus, the requirement of charging the electric bicycles in the campus cannot be met, the charging efficiency is low, the damage to batteries is large, and the charging safety cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem that appears in the above-mentioned technique, provide an automatic charger of bluetooth control, this charger simple structure occupies the charging position little, can adjust charging voltage and charging current's size, and has wireless transmission function, can have the bluetooth with cell-phone etc. and join in marriage the equipment data interaction of end, the convenient control that charges to electric bicycle.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

the utility model provides an automatic charger of bluetooth control, includes control unit and power module, control unit includes host system and bluetooth module, host system is STM32F103 singlechip, STM32F103 singlechip is connected to bluetooth module, power module includes power supply circuit and power module circuit, power supply circuit is connected to STM32F103 singlechip power input end, power module circuit includes chip supply circuit and operational amplification supply circuit, chip supply circuit is connected to power supply circuit, operational amplification supply circuit is connected with voltage current amplifier circuit, voltage current amplifier circuit is connected to power output's battery.

Further, as a preferred technical scheme, the STM32F103 single chip microcomputer includes a download circuit, a reset circuit and a crystal oscillator circuit, and the crystal oscillator circuit includes a high-speed clock and a low-speed clock.

Further, as a preferred technical scheme, the crystal oscillator circuit respectively adopts a 32.768MHz crystal oscillator and an 8MHz crystal oscillator, and the 32.768MHz crystal oscillator and the 8MHz crystal oscillator are respectively input from

pins

12 and 13 and

pins

8 and 9 of an STM32F103 singlechip.

Further, as an optimal technical scheme, the reset circuit is connected with a No. 14 pin of the STM32F103 singlechip.

Further, as an optimal technical scheme, the STM32F103 single chip microcomputer is further connected with a display module, the display module comprises a liquid crystal screen, a display module circuit and an SD card, and the display module circuit is respectively connected to the liquid crystal screen and the SD card.

Further, as an optimal technical scheme, the STM32F103 single chip microcomputer is further connected with a key module, and the key module comprises a plurality of independent key circuits.

Further, as a preferred technical scheme, the bluetooth module adopts a bluetooth 2.0 protocol, and can be paired with a terminal with a bluetooth function, and the bluetooth module communication interface adopts a TTL level standard serial port.

The utility model discloses the beneficial effect who has:

the utility model takes STM32F103 as a main control chip, and takes a chip power supply circuit and an operational amplification power supply circuit as power supply conversion hardware circuits, so that the utility model can adjust the charging voltage and the charging current, has wireless transmission function, can perform data interaction with equipment with Bluetooth matching end such as mobile phone, and is convenient for controlling charging; the charging system can automatically power off when charging is finished, and can send information to equipment such as a mobile phone and the like at a Bluetooth matching end to remind a user of timely powering off and taking a car.

Drawings

FIG. 1 is a block diagram of the present invention;

fig. 2 is a circuit diagram of a display module according to the present invention;

FIG. 3 is a power supply circuit diagram of the present invention;

FIG. 4 is a circuit diagram of the key module of the present invention;

fig. 5 is a circuit diagram of the power module of the present invention;

FIG. 6 is a circuit diagram of the chip power supply of the present invention;

FIG. 7 is a diagram of the operational amplifier power supply circuit of the present invention;

fig. 8 is a circuit diagram of the current amplifying circuit of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

Examples

As shown in figure 1, an automatic charger of bluetooth control, including control unit and power module, control unit includes main control module and bluetooth module, main control module is the STM32F103 singlechip, the STM32F103 singlechip is connected to bluetooth module, power module includes power supply circuit and power module circuit, power supply circuit is connected to STM32F103 singlechip power input end, as shown in figure 5, power module circuit includes chip supply circuit and operational amplification power supply circuit, as shown in figure 6 and figure 7, chip supply circuit is connected to power supply circuit, the operational amplification power supply circuit is connected with voltage current amplifier circuit, voltage current amplifier circuit is connected to the battery of power output end. The STM32F103 single chip microcomputer has the function of being responsible for controlling the charger in real time. In the hardware circuit design of the module, because the crystal oscillator is the key for ensuring that the system can operate effectively and has a large influence on the system, the crystal oscillator in the STM32F103 single chip circuit comprises a high-speed clock and a low-speed clock, and the functions of the two clocks are different. The low speed clock allows the system master clock to function properly. The high speed clock helps the auxiliary clock to run normally. The present embodiment employs crystal oscillators of 32.768MHz and 8 MHz. Respectively from

pins

12 and 13 and

pins

8 and 9. The reset circuit is connected with a pin No. 14 of the STM32, namely a reset pin, and when the level of the reset pin is changed from high to low, the chip is reset. The working voltage of the STM32F103 single chip microcomputer in the embodiment is 3.3V, and the voltage of the external adapter is 5V. The power supply circuit needs to convert 5V to 3.3V. As shown in FIG. 3, LM2596-3.3V is selected as the power supply chip in the present embodiment. The LM2596 series of integrated voltage stabilizing chips are internally provided with a protection circuit, and have the advantages of small output voltage error, convenience and simplicity in use, standard packaging and the like. Even if the system fails due to a wrong instruction, the LM2595 circuit cannot be damaged immediately, and the voltage stabilizing chip is safe and high in accuracy. In the embodiment, XL1509 is used for converting a higher power supply voltage into a 12V voltage, 5V is converted into an XL series XL7005 to realize a chip power supply circuit, the power supply of the operational amplification power supply circuit is also directly provided by the power supply voltage, and the power supply voltage is required to be higher than the voltage needing to be output by more than 2V. XL7005A is switching step-down type direct current conversion chip, has simple structure, and the simple characteristics of chip peripheral circuit, and its chip inside has a protection circuit, and when the system short circuit, input current is too big or the system breaks down, this chip can both start protect function, and protection power supply circuit is not burnt. The chip also has the function that the load adjustable rate is not possessed by other voltage conversion chips. Wherein, the power module can communicate the agreement: the overall structure of the control command adopts a command line mode, the communication speed can be selected among four baud rates (2400, 4800, 9600 and 19200), and the machine address codes can be set to be in the range of A-Z for 26. The PC sends out commands, the local machine analyzes and executes the commands, and the results are returned to the PC under the condition that the address codes are consistent, and no information is returned when the address codes are different, so that the method is very suitable for the condition of multi-machine centralized control. As shown in fig. 8, the voltage-current amplification circuit includes a current amplification circuit and a voltage amplification circuit.

As shown in fig. 2, the STM32F103 single chip microcomputer is further connected with a display module, the display module comprises a liquid crystal screen, a display module circuit and an SD card, and the display module circuit is respectively connected to the liquid crystal screen and the SD card. In the embodiment, TFT liquid crystal display is adopted, and TFT is a thin film transistor which is a display module capable of driving each pixel point in liquid crystal through an integrated thin film transistor. The TFT liquid crystal screen has the characteristics of high brightness, high contrast and high-speed color liquid crystal display, and can realize the function of a touch screen after a touch screen module is added. It also supports the display of Chinese characters, pictures, etc., wherein the font size is adjustable, and the number of words displayed on a single screen depends on the size of the liquid crystal screen and the font size. The liquid crystal module is used for visually displaying various required data and is convenient for reading the data. In the intelligent charging control system, a character library is stored in an SD card, and a liquid crystal calls a character matrix from the SD card to display Chinese characters.

As shown in fig. 4, the STM32F103 single chip microcomputer is further connected with a key module, and the key module comprises a plurality of independent key circuits. The key module can realize the human-computer interaction function and can carry out output selection or parameter setting. When the key is off, the input end of the circuit is at low potential, and when the key is on, the input end is at high potential. Through the change of the electric potential, the singlechip can know the operation of reading the user in real time, and realize the corresponding function.

The Bluetooth module adopts a Bluetooth 2.0 protocol and can be matched with a terminal with a Bluetooth function, and a communication interface of the Bluetooth module adopts a TTL level standard serial port.

The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.

Claims

1. The utility model provides an automatic charger of bluetooth control, includes the control unit and power module, its characterized in that, the control unit includes host system and bluetooth module, host system is STM32F103 singlechip, STM32F103 singlechip is connected to bluetooth module, power module includes power supply circuit and power module circuit, power supply circuit is connected to STM32F103 singlechip power input end, power module circuit includes chip supply circuit and operational amplification supply circuit, chip supply circuit is connected to power supply circuit, operational amplification supply circuit is connected with voltage current amplifier circuit, voltage current amplifier circuit is connected to power output's battery.

2. The bluetooth controlled automatic charger according to claim 1, wherein the STM32F103 single chip microcomputer comprises a download circuit, a reset circuit and a crystal oscillator circuit, and the crystal oscillator circuit comprises a high-speed clock and a low-speed clock.

3. The Bluetooth-controlled automatic charger according to claim 2, wherein the crystal oscillator circuit respectively adopts a 32.768MHz crystal oscillator and an 8MHz crystal oscillator, and the 32.768MHz crystal oscillator and the 8MHz crystal oscillator are respectively input from pins 12 and 13 and pins 8 and 9 of an STM32F103 singlechip.

4. The Bluetooth controlled automatic charger according to claim 2, wherein the reset circuit is connected with pin 14 of the STM32F103 singlechip.

5. The Bluetooth-controlled automatic charger according to claim 1, wherein the STM32F103 single chip microcomputer is further connected with a display module, the display module comprises a liquid crystal screen, a display module circuit and an SD card, and the display module circuit is respectively connected to the liquid crystal screen and the SD card.

6. The Bluetooth-controlled automatic charger according to claim 1, wherein the STM32F103 single chip microcomputer is further connected with a key module, and the key module comprises a plurality of independent key circuits.

7. The bluetooth controlled automatic charger according to claim 1, wherein the bluetooth module uses bluetooth 2.0 protocol and can be paired with a terminal having bluetooth function, and the bluetooth module communication interface uses TTL level standard serial port.