Mining flame-proof and intrinsically safe lithium ion storage battery power supply device

By introducing a variety of circuits and hardware modules into the mine explosion-proof and intrinsically safe lithium-ion battery power supply device, the problem of single output voltage level of the existing power supply is solved, and the output of stable voltage levels is achieved, and the safety is improved. and flexibility.

CN222464162UActive Publication Date: 2025-02-11SHANXI JIAN ELECTRIC
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Patent Information

Application Number
CN202420475571.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-12
Publication Date
2025-02-11
Estimated Expiration
2034-03-12

AI Technical Summary

Technical Problem

The existing explosion-proof and intrinsically safe lithium-ion battery power supply output voltage level is single and cannot be applied to equipment with different voltage levels at the same time, resulting in the need of an external electric control box underground in the coal mine, which increases the difficulty of carrying, inconvenience of maintenance and cost.

Method used

By introducing transformers, inverters, rectifier modules and multiple power modules into the mine explosion-proof and intrinsically safe lithium-ion battery power supply device, combining the BMS management system and an isolated safety gate, a stable output of different levels of voltages is achieved, and The security and flexibility of the power supply are improved through improved circuit structure and combined connection of hardware modules.

Benefits of technology

It realizes the output of stable voltages of different levels, reduces costs, improves the safety of maintenance personnel, and facilitates the carrying and maintenance of equipment. At the same time, the non-intrinsic safety power supply is converted into intrinsic safety power supply through the intrinsic safety power supply module, providing a wider range of voltages support.

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Abstract

The utility model discloses a mining flameproof and intrinsically safe lithium ion storage battery power supply device, and belongs to the technical field of mining power supplies. The technical problem to be solved is to provide a storage battery power supply device capable of simultaneously outputting different levels of direct current and alternating current. According to the technical scheme, the device comprises a device cavity, a transformer is arranged in the device cavity, the first output end of the transformer is electrically connected with an inverter, the second output end of the transformer is electrically connected with a rectifier module and a charger, and the rectifier module is electrically connected with the inverter, a first power module and the output end of the charger. The first power supply module is connected in series with the intrinsic safety power supply module and then connected to the intrinsic safety circuit, the output end of the charger is electrically connected with a battery pack and a second power supply module, the battery pack is further electrically connected with a BMS management system, the BMS management system is electrically connected with the charger and a display device, and the second power supply module is electrically connected with a display device and an isolated safety barrier. The display device is electrically connected with the isolation type safety barrier; the mining explosion-proof power supply is applied to mining explosion-proof power supplies.
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Description

Technical Field

[0001] The utility model provides a mine-used explosion-proof and intrinsically safe lithium-ion storage battery power supply device, belonging to the technical field of mine-used power supplies. Background Art

[0002] With the development of the coal industry and the upgrading and transformation of coal mine intelligence, coal mine underground substations have gradually realized unmanned operation, and the power monitoring system, monitoring communication system, and emergency shelter facilities have increasingly higher requirements for the capacity of explosion-proof power supplies. At present, the existing flameproof and intrinsically safe lithium-ion battery power supply has a single output voltage level and cannot be used for equipment with different voltage level requirements at the same time. If other voltage levels are required in coal mines, an additional electric control box is often required, which makes multiple electric control boxes inconvenient to carry, not conducive to maintenance, and greatly increases costs. Utility Model Content

[0003] In order to solve the technical problem of flameproof and intrinsically safe lithium-ion battery power supply outputting different levels of voltage, the utility model proposes a flameproof and intrinsically safe lithium-ion battery power supply device for mining, and aims to realize the flameproof and intrinsically safe lithium-ion battery power supply outputting stable, safe and different levels of voltage by improving the circuit structure of the flameproof and intrinsically safe lithium-ion battery power supply or improving the combined connection of hardware modules and / or circuits, thereby improving the safety of maintenance personnel during maintenance.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a mine explosion-proof and intrinsically safe lithium-ion battery power supply device, comprising an equipment cavity, a transformer is arranged in the equipment cavity, the input end of the transformer is connected in series with a main switch and then connected to a three-phase AC power supply, the first output end of the transformer is electrically connected to an inverter, the second output end of the transformer is connected in parallel to the input end of a rectifier module and the input end of a charger, and the DC output end of the rectifier module is connected in parallel to the input end of the inverter, the input end of the first power module and the output end of the charger;

[0005] A diode is connected in series between the output end of the rectifier module and the output end of the charger;

[0006] The output end of the first power supply module is connected in series with an intrinsically safe power supply module and then connected to an intrinsically safe circuit;

[0007] The output end of the charger is connected in parallel to one end of the main switch, one end of the second power module and the input end of the inverter;

[0008] The other end of the main switch is connected in series with the battery pack maintenance switch and then electrically connected to the battery pack;

[0009] A switch board is connected in series between the output end of the charger and the main switch;

[0010] The switch board is also electrically connected to a BMS management system;

[0011] The other end of the battery pack is electrically connected to a BMS management system;

[0012] The BMS management system is also electrically connected to a control terminal of the charger and an input terminal of the display device;

[0013] The other end of the second power module is connected in parallel to one end of the display device and one end of the isolation safety barrier. The other end of the display device is electrically connected to the other end of the isolation safety barrier. The isolation safety barrier is also electrically connected to an intrinsically safe circuit.

[0014] Furthermore, the main switch is arranged in the isolation cavity.

[0015] Furthermore, the battery pack is arranged in a battery cavity, and a battery voltage sampling board, a battery temperature sampling board, a fuse and a manual isolating switch are also arranged in the battery cavity.

[0016] Furthermore, the BMS management system is provided with a battery temperature and voltage monitoring device, an over-temperature and over-pressure alarm device, an over-charge and over-discharge alarm device, a charge and discharge over-current alarm device and a battery status display device.

[0017] Furthermore, the battery pack is a plurality of single explosion-proof batteries connected in series, and the battery components are assembled in two layers, upper and lower.

[0018] Furthermore, the model of the transformer is SG series.

[0019] Furthermore, the inverter model is LXD series.

[0020] Furthermore, the model of the charger is XN series.

[0021] Furthermore, the model of the switch board is SKG series.

[0022] Furthermore, the model of the isolated safety barrier is BM series.

[0023] The beneficial effects of the present invention compared with the prior art are as follows:

[0024] 1. The utility model can output stable voltages of different levels and supply power to devices that require different voltage levels at the same time, thereby reducing costs. It can directly output AC power through a transformer or output DC power through a sorting module. When the mains fails, the required DC or AC voltage level can also be provided to the outside through a battery pack;

[0025] 2. The utility model unifies and organizes related equipment and cables through the equipment cavity, isolation cavity, battery cavity and wiring cavity, which is easy to carry. The main switch and battery pack maintenance switch are placed in the isolation cavity, which is convenient for later maintenance and improves the safety of maintenance personnel when repairing the equipment cavity;

[0026] 3. The utility model can convert a non-intrinsically safe power supply into an intrinsically safe power supply through an intrinsically safe power supply module, and provide an intrinsically safe power supply to the outside through the outlet terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] Figure 1 This is a circuit structure diagram of the utility model;

[0029] In the figure: 1 is the main switch, 2 is the transformer, 3 is the rectifier module, 4 is the charger, 5 is the switch board, 6 is the battery pack, 7 is the BMS management system, 8 is the first power module, 9 is the display device, 10 is the isolation safety barrier, 11 is the inverter, 12 is the intrinsically safe power module, 13 is the battery pack maintenance switch, and 14 is the second power module. DETAILED DESCRIPTION

[0030] The principle of the present utility model will be further described below in conjunction with specific embodiments and drawings.

[0031] like Figure 1 As shown, the utility model provides a mining explosion-proof and intrinsically safe lithium-ion battery power supply device, including an equipment chamber, an isolation chamber, a battery chamber and a wiring chamber. The equipment chamber includes a transformer 2. The input end of the transformer 2 is connected in series with a main switch 1 and then connected to a three-phase AC power supply. The first output end of the transformer 2 is electrically connected to an inverter 11. The second output end of the transformer 2 is connected in parallel to the input end of a rectifier module 3 and the input end of a charger 4. The output end of the rectifier module 3 is connected in parallel to a DC output end, the inverter 11, one end of a first power module 8 and the charger 4. At the output end of the motor 4, the transformer 2 provides power for the charger 4, the positive output end of the charger 4 is electrically connected to the main switch 1, the battery pack maintenance switch 13 and the positive electrode of the battery pack 6 in sequence, and the negative output end of the charger 4 is electrically connected to the switch board 5, the main switch 1, the battery pack maintenance switch 13 and the negative electrode of the battery pack 6 in sequence. The charger 4 charges the lithium-ion battery pack 6, and the battery pack 6 is connected in series with the BMS management system 7, which is electrically connected to the control end of the charger 4, the input end of the display device 9 and one end of the switch board 5;

[0032] The switch board 5 has the functions of current sampling and controlling the on-off of charging and discharging. The switch board 5 transmits the collected charging and discharging current signals to the BMS management system 7 in a timely manner. The BMS management system 7 is provided with a battery temperature monitoring device, a battery voltage monitoring device, an over-temperature and over-pressure alarm device, an over-charge and over-discharge alarm device, a charging and discharging over-current alarm device and a battery status display device 9 to monitor the working status of the battery pack 6 in real time. The BMS management system 7 controls the charger 4 and the switch board 5 according to the collected information of the battery pack 6, and further controls the charger 4 to charge and discharge the battery pack 6. At the same time, the BMS management system 7 uploads the collected battery working information to the display device 9.

[0033] A diode is connected in series between the positive output terminal of the rectifier module 3 and the positive output terminal of the charger 4 to prevent the rectifier module 3 from reversely charging the battery pack 6;

[0034] The output end of the charger 4 is also connected in parallel to one end of a second power module 14, and the other end of the second power module 14 is connected in parallel to a display device 9 and an isolated safety barrier 10. The display device 9 and the isolated safety barrier 10 are electrically connected, and the isolated safety barrier 10 is also electrically connected to an intrinsically safe circuit. The second power module 14 supplies power to the display device 9 and the isolated safety barrier 10.

[0035] The output end of the inverter 11 is connected in series with the AC output end. The inverter 11 inverts the DC power output by the battery pack 6 and the DC power output by the rectifier module 3 into AC power, and provides stable AC power to the outside through the AC output end.

[0036] The other end of the first power module 8 is connected in series with the intrinsically safe power module 12 and then connected to the intrinsically safe circuit. The first power module 8 provides power to the intrinsically safe power module 12, converts the non-intrinsically safe power into intrinsically safe power, and provides intrinsically safe power to the outside through the outlet terminal.

[0037] The main switch 1 is arranged in the isolation cavity, and is used to isolate and control the AC input power supply and the battery pack 6 input power supply, thereby improving the safety of maintenance personnel when performing equipment cavity maintenance.

[0038] The battery pack 6 is arranged in the battery cavity, and a battery voltage sampling board, a battery temperature sampling board, a fuse and a manual isolation switch are also provided in the battery cavity. The BMS management system 7 is responsible for the management and protection functions of the power supply during the charging and discharging process. The display device 9 outputs the received data through RS485 communication and the isolation safety barrier 10 to improve the safety, stability and reliability of the power supply.

[0039] The working principle of the utility model is:

[0040] After the utility model is connected to the main switch 1, the city power is converted into the voltage required by the equipment through the transformer 2, and then the AC power is converted into DC power through the rectifier module 3, and a stable DC power supply is output externally; at the same time, the transformer 2 also supplies power to the charger 4, and the output end of the charger 4 supplies power to the lithium-ion battery pack 6 through the main switch 1 and the battery pack maintenance switch 13. When the lithium-ion battery pack 6 is discharged, the battery pack 6 provides the required power to the outside through the diode and the switch board 5. The switch board 5 transmits the collected charge and discharge current signals to the BMS management system 7 in time, and the BMS management system 7 monitors the working status of the battery pack 6 in real time. The BMS management system 7 transmits the received data to the display device 9 through RS485, and the display device 9 transmits the received data to the outside through the isolation safety barrier 10, ensuring the safe, stable and reliable operation of the power supply, and improving the safety of the maintenance personnel.

[0041] The model of the transformer is SG series, the model of the inverter is LXD series, the model of the charger is XN series, the model of the switch board is SKG series, the model of the isolation safety barrier is BM series, and the first power module and the second power module are both DC / DC power modules.

[0042] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A flameproof and intrinsically safe lithium-ion battery power supply device for mining, characterized in that: The device comprises an equipment cavity, in which a transformer (2) is arranged, the input end of the transformer (2) is connected in series with a main switch (1) and then connected to a three-phase AC power supply, the first output end of the transformer (2) is electrically connected to an inverter (11), the second output end of the transformer (2) is connected in parallel to the input end of a rectifier module (3) and the input end of a charger (4), and the DC output end of the rectifier module (3) is connected in parallel to the input end of the inverter (11), the input end of a first power module (8) and the output end of the charger (4); A diode is connected in series between the output end of the rectifier module (3) and the output end of the charger (4); The output end of the first power module (8) is connected in series with an intrinsically safe power module (12) and then connected to an intrinsically safe circuit; The output end of the charger (4) is connected in parallel to one end of the main switch (1), one end of the second power module (14) and the input end of the inverter (11); The other end of the main switch (1) is connected in series with a battery pack maintenance switch (13) and then electrically connected to a battery pack (6); A switch board (5) is connected in series between the output end of the charger (4) and the main switch (1); The switch board (5) is also electrically connected to a BMS management system (7); The other end of the battery pack (6) is electrically connected to a BMS management system (7); The BMS management system (7) is also electrically connected to a control terminal of the charger (4) and an input terminal of the display device (9); The other end of the second power module (14) is connected in parallel to one end of the display device (9) and one end of the isolation safety barrier (10); the other end of the display device (9) is electrically connected to the other end of the isolation safety barrier (10); and the isolation safety barrier (10) is also electrically connected to an intrinsically safe circuit.

2. A mine-use explosion-proof and intrinsically safe lithium-ion battery power supply device according to claim 1, characterized in that: The main switch (1) is arranged in the isolation cavity.

3. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1 is characterized in that: The battery pack (6) is arranged in a battery cavity, and a battery voltage sampling board, a battery temperature sampling board, a fuse and a manual isolation switch are also arranged in the battery cavity.

4. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The BMS management system (7) is provided with a battery temperature and voltage monitoring device, an over-temperature and over-pressure alarm device, an over-charge and over-discharge alarm device, a charge and discharge over-current alarm device and a battery status display device (9).

5. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The battery pack (6) is a plurality of single explosion-proof batteries connected in series, and the battery pack (6) is assembled in two layers, upper and lower.

6. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The model of the transformer (2) is SG series.

7. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The inverter (11) is of the LXD series.

8. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The model of the charger (4) is XN series.

9. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The model of the switch plate (5) is SKG series.

10. The explosion-proof and intrinsically safe lithium-ion battery power supply device for mining according to claim 1, characterized in that: The model of the isolation type safety barrier (10) is BM series.