Mining energy storage multipath power supply output device

Abstract

The utility model relates to a mining energy storage multipath power supply output device, comprising an AC / DC conversion board and a current conversion circuit, the current conversion circuit comprises a current control chip, a transformer, a filter circuit B, a three-stage overvoltage protection circuit and an output circuit, and the primary side of the transformer is connected with a voltage stabilizing circuit. The control end of the transformer is connected with the output end of the current control chip, the secondary side of the transformer is connected with a filter circuit B and a three-stage overvoltage protection circuit, the output end of the three-stage overvoltage protection circuit is connected with a power switch module, and an isolation circuit is arranged between the power switch module and the three-stage overvoltage protection circuit. The output end of the power switch module is connected with an output circuit, the output circuit is provided with a power resistor, and the output circuit is connected with a standby battery and an output terminal; the standby battery is provided with a BMS module. According to the utility model, a photoelectric isolation design is adopted, multi-path output is designed, overvoltage and overcurrent protection is carried out by combining a three-stage overvoltage protection circuit and a power resistor, and multi-path intrinsically safe power supply output is realized.

Description

Technical Field

[0001] The utility model relates to the field of intrinsically safe power supplies for mines, and particularly to a multi-channel power output device for mine energy storage. Background Art

[0002] Many electrical equipment are needed in mining operations. The existing safety power supply systems include power supply through lines or using battery power. The structure of the line power supply system is relatively complex and the output is relatively single. Moreover, the mine power supply system needs to be intrinsically safe designed so that the line power supply system can be used in flammable and explosive environments. Due to the long lines, it is inconvenient to maintain, and the equipment cannot be powered continuously after a power outage. In the existing battery power supply system, due to the need to meet the use in flammable and explosive environments, it needs to be intrinsically safe designed, resulting in few output channels and few output types, and it is impossible to supply power to multiple electrical equipment at the same time. At the same time, for safety reasons, the charging of the battery power supply is relatively troublesome.

[0003] Therefore, there is an urgent need for a multi-channel power output device that can provide safety protection, stable output and convenient charging. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a multi-channel power output device for mine energy storage, which is provided with an AC-DC circuit and a DC-DC circuit, adopts opto-isolation design and designs multiple outputs, combines a three-stage overvoltage protection circuit and a power resistor for overvoltage and overcurrent protection, realizes multi-channel intrinsically safe power output, and combines a BMS module to complete the charging of the backup battery.

[0005] A multi-channel power output device for mine energy storage includes an AC-DC conversion board, a current conversion circuit, a backup battery and output terminals. The AC-DC conversion board is connected to an AC power supply, and the output end of the AC-DC conversion board is connected to the current conversion circuit. The current conversion circuit is connected to a load and a backup battery. The AC-DC conversion board includes an R-type transformer, a rectification circuit, a filtering circuit A and a voltage stabilization circuit. The secondary side of the R-type transformer is connected to the rectification circuit, which is connected to the voltage stabilization circuit through the filtering circuit A. The output end of the voltage stabilization circuit is connected to the current conversion circuit. The current conversion circuit includes a current control chip, a transformer, a filtering circuit B, a three-stage overvoltage protection circuit and an output circuit. The primary side of the transformer is connected to the voltage stabilization circuit, and the control end of the transformer is connected to the output end of the current control chip. The secondary side of the transformer is connected to the filtering circuit B and the three-stage overvoltage protection circuit. The output end of the three-stage overvoltage protection circuit is connected to a power switch module. An isolation circuit is arranged between the power switch module and the three-stage overvoltage protection circuit. The output end of the power switch module is connected to the output circuit. The output circuit is provided with a power resistor. The output circuit is connected to the backup battery and the output terminals;

[0006] The backup battery is provided with a BMS module.

[0007] Further, a fuse is provided between the voltage stabilizing circuit and the transformer, and a high-efficiency diode is provided between the secondary side of the transformer and the filter circuit B;

[0008] A feedback circuit is provided between the high-efficiency diode and the filter circuit B. The feedback circuit includes an optocoupler element 1, and the output end of the optocoupler element 1 is connected to a current control chip.

[0009] The feedback circuit is used for current feedback, which is transmitted to the current control chip through the optocoupler element 1. The current control chip performs current sensing and comparison, and realizes electrical isolation between control and output through the optocoupler element 1 to improve circuit safety.

[0010] Further, a MOS tube is provided between the current control chip and the control end of the transformer. The G pole of the MOS tube is connected to the current control chip, and the S pole is connected to the control end of the transformer.

[0011] The current control chip controls the on and off of the MOS tube, and adjusts the circuit output by using the PWM control method.

[0012] Further, the three-stage overvoltage protection circuit includes a thyristor and a zener diode. The positive pole of the zener diode is connected to the output end of the thyristor, and the input end of the thyristor is connected to the filter circuit B.

[0013] When the output voltage is higher than the set value, the thyristor is driven to short-circuit to the ground, forcing the external fuse to fail, avoiding sparks generated in other external circuits due to output overvoltage, and thus improving the use safety of the circuit.

[0014] Further, the number of the isolation circuit, the power switch module and the output circuit is multiple;

[0015] The isolation circuit includes an optocoupler element 2. One end of the optocoupler element 2 is connected to the three-stage overvoltage protection circuit, and the other end is connected to the power switch module. The power switch module includes a VBA2625 chip, and the output end of the power switch module is connected to the output circuit.

[0016] The electrical isolation between each output and control is ensured through the optocoupler element 2 to ensure the use safety of the circuit.

[0017] Further, the AC-DC conversion board, the current conversion circuit and the backup battery are provided with a housing. The housing is a hollow square structure made of flameproof material, and the output terminals are provided on the outer side surface of the housing.

[0018] The flameproof housing is provided to protect the internal circuit, and at the same time, the intrinsically safe design is adopted to avoid the generation of sparks in the internal circuit.

[0019] Through the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] The present utility model can achieve multi-channel intrinsically safe power output. An AC-DC conversion board is provided to achieve AC-DC conversion, and a current conversion circuit is provided for DC-DC conversion. Among them, the current control chip adjusts the output size through PWM control mode, and multi-channel output is carried out through the power switch module. A three-stage overvoltage protection circuit is provided to force the external fuse to fail. The three-stage protection adopts the same design to avoid the failure of a certain path and prevent sparks from being generated in other external circuits due to overvoltage output. A power resistor is provided for overcurrent protection to meet the requirements of intrinsically safe circuit design and achieve multi-channel intrinsically safe power output. In addition, a BMS module is provided to charge the backup battery, so that the backup battery supplies power to the load after the power supply stops. Provide a safe and stable power supply for the load. Description of the Drawings

[0021] Figure 1 It is one of the circuit diagrams of a mine energy storage multi-channel power output device of the present utility model;

[0022] Figure 2 It is the second circuit diagram of a mine energy storage multi-channel power output device of the present utility model;

[0023] Figure 3 It is the third circuit diagram of a mine energy storage multi-channel power output device of the present utility model;

[0024] Figure 4 It is the structural schematic diagram of a mine energy storage multi-channel power output device of the present utility model.

[0025] Reference numerals in the drawings: 1 is the backup battery, 2 is the output terminal, 3 is the R-type transformer, 4 is the rectifying circuit, 5 is the filtering circuit B, 6 is the voltage stabilizing circuit, 7 is the current control chip, 8 is the transformer, 9 is the three-stage overvoltage protection circuit, 10 is the output circuit, 11 is the power switch module, 12 is the isolation circuit, 13 is the power resistor, 14 is the fuse, 15 is the high-efficiency diode, 17 is the feedback circuit, 18 is the MOS tube, 19 is the housing. Detailed Embodiments

[0026] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0027] Embodiment 1

[0028] As Figures 1 to 4As shown in the figure, a multi-channel power output device for mine energy storage includes an AC-DC conversion board, a current conversion circuit, a backup battery 1, and output terminals 2. The AC-DC conversion board is connected to an AC power supply, and the output end of the AC-DC conversion board is connected to the current conversion circuit. The current conversion circuit is connected to a load and the backup battery 1. The AC-DC conversion board includes an R-type transformer 3, a rectification circuit 4, a filter circuit A, and a voltage stabilization circuit 6. The secondary side of the R-type transformer 3 is connected to the rectification circuit 4, which is connected to the voltage stabilization circuit 6 via the filter circuit A. The output end of the voltage stabilization circuit 6 is connected to the current conversion circuit. The current conversion circuit includes a current control chip 7, a transformer 8, a filter circuit B5, a three-stage overvoltage protection circuit 9, and an output circuit 10. The primary side of the transformer 8 is connected to the voltage stabilization circuit 6, the control end of the transformer 8 is connected to the output end of the current control chip 7, the secondary side of the transformer 8 is connected to the filter circuit B5 and the three-stage overvoltage protection circuit 9, and the output end of the three-stage overvoltage protection circuit 9 is connected to a power switch module 11. An isolation circuit 12 is provided between the power switch module 11 and the three-stage overvoltage protection circuit 9, and the output end of the power switch module 11 is connected to the output circuit 10. The output circuit 10 is provided with a power resistor 13, and the output circuit 10 is connected to the backup battery 1 and the output terminals 2;

[0029] The backup battery 1 is provided with a BMS module.

[0030] In this embodiment, the rectification circuit 4 is a bridge rectification circuit, the current control chip 7 is a UC3844BDR2G chip, the transformer 8 is a TRANS6A, and the filter circuit B5 includes a PDUUAT98-102MLN common mode filter.

[0031] A fuse 14 is provided between the voltage stabilization circuit 6 and the transformer 8, and a high-efficiency diode 15 is provided between the secondary side of the transformer 8 and the filter circuit B5;

[0032] A feedback circuit 17 is provided between the high-efficiency diode 15 and the filter circuit B5. The feedback circuit 17 includes an optocoupler element 1, and the output end of the optocoupler element 1 is connected to the current control chip 7.

[0033] During operation, the fuse 14 performs overcurrent protection. The input current is output through the transformer 8. After the high-efficiency diode 15 conducts, the current passes through the optocoupler element 1, and the optocoupler element 1 conducts and the current control chip 7 receives the signal of the optocoupler element 1.

[0034] A MOS tube 18 is provided between the current control chip 7 and the control end of the transformer 8. The G pole of the MOS tube 18 is connected to the current control chip 7, and the S pole is connected to the control end of the transformer 8.

[0035] The current control chip 7 completes the output control of the transformer 8 by controlling the on-off frequency of the MOS transistor 18, thereby regulating the circuit output.

[0036] The three-stage overvoltage protection circuit 9 includes a thyristor and a zener diode. The positive pole of the zener diode is connected to the output end of the thyristor, and the input end of the thyristor is connected to the filter circuit B5.

[0037] During operation, when the output voltage is higher than the set value, the thyristor conducts and is shorted to the ground, and the external fuse fails.

[0038] The number of the isolation circuit 12, the power switch module 11 and the output circuit 10 is multiple;

[0039] The isolation circuit 12 includes an optocoupler element 2. One end of the optocoupler element 2 is connected to the three-stage overvoltage protection circuit 9, and the other end is connected to the power switch module 11. The power switch module 11 includes a VBA2625 chip, and the output end of the power switch module 11 is connected to the output circuit 10.

[0040] The AC-DC conversion board, the current conversion circuit and the backup battery 1 are provided with a housing 19. The housing 19 is a square structure with a hollow interior made of explosion-proof material, and the output terminal 2 is arranged on the outer side surface of the housing 19.

[0041] In this embodiment, 2-way DC12V outputs and 4-way DC18V outputs are provided. The backup battery 1 uses a lithium iron phosphate battery, and the BMS module adopts an independent protection mechanism for each battery cell. If any battery cell has an abnormality, the BMS will immediately disconnect the battery cell, and at the same time, other battery cells can work normally. The BMS module automatically adjusts the threshold setting of the output protection, making the use process safer and more standardized. In this embodiment, the BMS module adopts the N83524 type BMS module produced by NGI.

[0042] In this embodiment, the input currents are AC660V, AC380V, AC220V and AC127V power supplies.

[0043] During operation, the AC power supply is stepped down by the R-type transformer 3, and then rectified, filtered and regulated by the rectifier circuit 4, the filter circuit A and the voltage regulator circuit 6 to output a stable DC24V DC power supply. The DC24V power supply is output through the transformer 8. The output of the transformer 8 is controlled by the current control chip 7 through the MOS transistor, and finally the power switch module 11 outputs two-way DC12V and four-way DC18V currents. During this period, overvoltage and overcurrent protection are carried out, and finally the two-way DC12V and four-way DC18V intrinsically safe power supplies are output to provide a stable DC power supply for the load. At the same time, it also charges the backup battery 1. The BMS module manages the charging of the backup battery 1.

[0044] The above-described embodiments are only the preferred embodiments of the present utility model and do not limit the scope of implementation of the present utility model. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present utility model patent shall be included within the scope of the patent application of the present utility model.

Claims

1. A mine-used energy storage multi-channel power output device, comprising an AC-DC conversion board, a current conversion circuit, a backup battery (1) and output terminals (2). The AC-DC conversion board is connected to an AC power supply, the output end of the AC-DC conversion board is connected to the current conversion circuit, and the current conversion circuit is connected to a load and the backup battery (1), characterized in that, The AC-DC conversion board includes an R-type transformer (3), a rectification circuit (4), a filter circuit A, and a voltage stabilization circuit (6). The secondary side of the R-type transformer (3) is connected to the rectification circuit (4), which is connected to the voltage stabilization circuit (6) via the filter circuit A. The output end of the voltage stabilization circuit (6) is connected to a current conversion circuit. The current conversion circuit includes a current control chip (7), a transformer (8), a filter circuit B (5), a three-stage overvoltage protection circuit (9), and an output circuit (10). The primary side of the transformer (8) is connected to the voltage stabilization circuit (6), the control end of the transformer (8) is connected to the output end of the current control chip (7), the secondary side of the transformer (8) is connected to the filter circuit B (5) and the three-stage overvoltage protection circuit (9). The output end of the three-stage overvoltage protection circuit (9) is connected to a power switch module (11). An isolation circuit (12) is provided between the power switch module (11) and the three-stage overvoltage protection circuit (9). The output end of the power switch module (11) is connected to the output circuit (10). The output circuit (10) is provided with a power resistor (13). The output circuit (10) is connected to a backup battery (1) and an output terminal (2). The backup battery (1) is provided with a BMS module.

2. The mine energy storage multi-channel power output device according to claim 1, characterized in that, A fuse (14) is provided between the voltage stabilization circuit (6) and the transformer (8), and a high-efficiency diode (15) is provided between the secondary side of the transformer (8) and the filter circuit B (5). A feedback circuit (17) is provided between the high-efficiency diode (15) and the filter circuit B (5). The feedback circuit (17) includes an optocoupler element 1. The output end of the optocoupler element 1 is connected to the current control chip (7).

3. The multi-path power output device for mine energy storage according to claim 1, wherein A MOS tube (18) is provided between the current control chip (7) and the control end of the transformer (8). The G pole of the MOS tube (18) is connected to the current control chip (7), and the S pole is connected to the control end of the transformer (8).

4. The multi-path power output device for mine energy storage according to claim 1, characterized in that, The three-stage overvoltage protection circuit (9) includes a thyristor and a zener diode. The positive pole of the zener diode is connected to the output end of the thyristor, and the input end of the thyristor is connected to the filter circuit B (5).

5. The mine energy storage multi-channel power output device according to claim 1, wherein The number of the isolation circuit (12), the power switch module (11), and the output circuit (10) is multiple. The isolation circuit (12) includes an optocoupler element 2. One end of the optocoupler element 2 is connected to the three-stage overvoltage protection circuit (9), and the other end is connected to the power switch module (11). The power switch module (11) includes a VBA2625 chip. The output end of the power switch module (11) is connected to the output circuit (10).

6. The multi-channel power output device for mine energy storage according to claim 1, characterized in that, The AC-DC conversion board, the current conversion circuit, and the backup battery (1) are provided with a housing (19). The housing (19) is a square structure with a hollow interior made of explosion-proof material. The output terminal (2) is provided on the outer side surface of the housing (19).

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