CN104617614A - Super capacitor charging device - Google Patents

Abstract

The invention relates to a battery charging device and specifically relates to a super capacitor charging device. The super capacitor charging device is used for solving the problems of poor performance, complex structure, inconvenient operations, failure in effectively monitoring the temperatures and the like of the existing super capacitor charging device. The super capacitor charging device comprises a box and an internal circuit; an LCD touch screen is arranged on the box; positive and negative electrodes, a temperature sensor and a cooling fan or a circulating cooling water jacket are further arranged on the box; the internal circuit comprises a charging circuit and a charging control circuit; the charging circuit comprises an IGBT inverter, a transformer, a rectifier circuit and a filter circuit, all of which are orderly connected, as well as a voltage sensor and a current sensor; the charging control circuit comprises a DSP chip and an IR2235 control chip connected with the DSP chip; the output end of the IR2235 control chip is connected with the IGBT control end of the inverter; the voltage sensor, the current sensor and the temperature sensor are connected with the input end of the DSP chip; the output end of the DSP chip is connected with the cooling fan or the circulating cooling water jacket.

Description

Supercapacitor charging device

technical field

The invention relates to a battery charging device, in particular to a supercapacitor charging device.

Background technique

Supercapacitors are a new type of energy storage device developed in the 1970s, also known as gold capacitors and farad capacitors. Its energy storage process does not undergo chemical reactions, it only needs to store energy through polarized electrolytes, so this energy storage process is reversible and can be recharged up to 100,000 times. The power density of a supercapacitor is 100 times that of a chemical battery. It has the advantages of super long life, safety and reliability, green environmental protection, and maintenance-free. It can be charged quickly and can be fully charged in just a few seconds to a few minutes. Now it is widely used in various electronic equipment, renewable energy, electric vehicles, signal detection, military weapons and other fields.

The charging methods of supercapacitors mainly include: constant current charging, constant voltage charging, constant power charging, pulse current charging, and constant current and constant voltage charging. Constant current and constant voltage charging means that the constant current charging is carried out first, and the voltage at both ends of the battery continues to rise. When it rises to a predetermined voltage value, constant voltage charging is carried out. During this process, the current gradually decreases. Finish. Constant voltage and constant current charging can charge supercapacitors quickly and efficiently. In the temperature range of -40°C to 70°C, the performance of the supercapacitor is relatively stable. When the temperature exceeds this range, the performance of the supercapacitor deteriorates sharply. Therefore, it is very necessary to monitor the temperature during the charging and discharging process of the supercapacitor.

The existing supercapacitor charging device has relatively poor performance due to structural defects, and the structure is relatively complicated, and the operation is inconvenient, especially the temperature cannot be effectively monitored.

Contents of the invention

The invention solves the problems of poor performance, complex structure, inconvenient operation, inability to effectively monitor temperature and the like in the existing supercapacitor charging device, and provides a supercapacitor charging device.

The present invention is realized by adopting the following technical scheme: a supercapacitor charging device, including a box body and an internal circuit, an LCD touch screen is arranged on the box body, a supercapacitor card slot is also provided on the box body, and the top surface of the card slot is provided with Positive and negative electrodes, the bottom of the card slot is provided with a temperature sensor, and the lower part of the card slot is provided with a cooling fan or a circulating cooling water jacket; the internal circuit includes a charging circuit and a charging control circuit, and the charging circuit includes an IGBT inverter, transformer, Rectifier circuit and filter circuit, the two output terminals of the filter circuit are respectively connected to the positive and negative electrodes on the top surface of the card slot, the charging circuit also includes a charging voltage sensor and a charging current sensor; the charging control circuit includes a DSP chip and an IR2235 control circuit connected to the DSP chip Chip, the output end of the IR2235 control chip is connected to the IGBT control end of the inverter in the charging circuit, the charging voltage sensor, charging current sensor and the temperature sensor on the bottom of the card slot in the charging circuit are connected to the input end of the DSP chip, the box body The LCD touch screen on the screen is connected to the DSP chip, and the output terminal of the DSP chip is connected to the cooling fan or the circulating cooling water jacket (that is, whether the cooling fan switch or the cooling water circulation in the circulating cooling water jacket is controlled by the output terminal of the DSP chip. As for How the output end of the DSP chip ultimately controls the working state of the cooling fan and the circulating cooling water jacket is a conventional technology well known to those skilled in the art).

The working principle of the present invention is as follows: the supercapacitor to be charged is stuck in the slot on the box body and connected to the positive and negative electrodes. The user sets the preset voltage V _reg for constant voltage charging, the current I _off for ending charging, and the set temperature T _reg through the LCD touch screen. The DC source is input, and the AC power is obtained through the IGBT inverter, and then the supercapacitor battery pack is charged through the transformer and the rectification and filtering circuit. During the charging process, the voltage and current in the charging circuit are continuously monitored by the voltage and current sensors, and fed back to the DSP chip. The DSP chip compares the obtained voltage and current values with the preset V _reg and I _off . According to the ratio of the phase difference, the IR2235 control chip is controlled to output PWM waves with different duty ratios, so as to regulate the inverter, control the voltage and current in the charging circuit, and realize the constant current and constant voltage charging of the supercapacitor. The temperature obtained by the temperature sensor is compared with the preset temperature. When the actual temperature is higher than the set value, the DSP controls the refrigeration device to control the temperature of the supercapacitor. At the same time, the detected current, voltage and temperature values are displayed on the LCD touch screen. It can be seen from the above working process that the software involved in the DSP chip is easily implemented by those skilled in the art.

The present invention realizes parameter setting and display function through LCD touch screen, and carries out real-time monitoring to the voltage of charging circuit, current and the temperature of supercapacitor by voltage sensor, current sensor, temperature sensor, and the detected parameter information is processed as feedback signal by DSP , output PWM signals with different duty ratios to control the voltage and current in the charging circuit, and at the same time adjust the temperature of the supercapacitor through the refrigeration device, realizing the function of temperature-controllable constant current and constant voltage charge and discharge control, with good performance, It has the advantages of simple structure, good man-machine interface and convenient operation.

Description of drawings

Fig. 1 is the box structure schematic diagram of the present invention;

Fig. 2 is the principle block diagram of internal circuit of the present invention;

Fig. 3 is the schematic diagram of charging circuit;

Fig. 4 is a schematic diagram of the charging control circuit;

Wherein, Fig. 3 and Fig. 4 are connected to the end of the line of the same number. In the figure: 1-box, 2-LCD touch screen, 3-positive and negative electrodes, 4-temperature sensor, 5-cooling fan or circulating cooling water jacket.

Detailed ways

The supercapacitor charging device includes a box body 1 and an internal circuit. The box body 1 is provided with an LCD touch screen 2, and the box body is also provided with a supercapacitor card slot. The top surface of the card slot is provided with positive and negative electrodes 3, and the card slot The bottom surface of the card slot is provided with a temperature sensor 4, and the lower part of the card slot is provided with a cooling fan or a circulating cooling water jacket 5; the internal circuit includes a charging circuit and a charging control circuit, and the charging circuit includes an IGBT inverter, a transformer, a rectifier circuit and a filter connected in sequence. circuit, the two output terminals of the filter circuit are respectively connected to the positive and negative electrodes 3 on the top surface of the card slot, the charging circuit also includes a charging voltage sensor U and a charging current sensor A; the charging control circuit includes a DSP chip and an IR2235 control chip connected to the DSP chip , the output end of the IR2235 control chip is connected to the IGBT control end of the inverter in the charging circuit, the charging voltage sensor U, the charging current sensor A and the temperature sensor 4 on the bottom surface of the card slot in the charging circuit are connected to the input end of the DSP chip, The LCD touch screen 2 on the box body is connected with the DSP chip, and the output end of the DSP chip is connected with the cooling fan or the circulating cooling water jacket. The DC source required for the device to work is provided by an AC power source via an adapter.

Claims (1)

1. A supercapacitor charging device, characterized in that it includes a box (1) and an internal circuit, the box (1) is provided with an LCD touch screen (2), and the box is also provided with a supercapacitor card slot, The top surface of the card slot is provided with positive and negative electrodes (3), the bottom surface of the card slot is provided with a temperature sensor (4), and the lower part of the card slot is provided with a cooling fan or a circulating cooling water jacket (5); the internal circuit includes a charging circuit and a charging circuit. The control circuit, the charging circuit includes an IGBT inverter, a transformer, a rectifier circuit and a filter circuit connected in sequence, the two output terminals of the filter circuit are respectively connected to the positive and negative electrodes (3) on the top surface of the card slot, and the charging circuit also includes a charging voltage sensor (U) and charging current sensor (A); the charging control circuit includes a DSP chip and an IR2235 control chip connected to the DSP chip. The output terminal of the IR2235 control chip is connected to the IGBT control terminal of the inverter in the charging circuit. In the charging circuit The charging voltage sensor (U), charging current sensor (A) and the temperature sensor (4) on the bottom of the card slot are connected to the input terminal of the DSP chip, the LCD touch screen (2) on the box is connected to the DSP chip, and the output of the DSP chip The end is connected with a cooling fan or a circulating cooling water jacket.