Search

CN-122001038-A - Mining flameproof and intrinsically safe lithium ion storage battery power supply

CN122001038ACN 122001038 ACN122001038 ACN 122001038ACN-122001038-A

Abstract

The embodiment of the application relates to the field of lithium ion battery power supplies, in particular to a mining flameproof and intrinsically safe lithium ion battery power supply. The specific implementation mode of the method comprises the steps of supporting 3 low-voltage grade access, namely 1140V, 660V and 127V respectively, supplying 3 input voltages to a transformer after passing through a measuring loop 1, wherein the measuring loop 1 is used for measuring voltage values, current values and active power values of the input voltages, the transformer outputs alternating current 127V, the alternating current 127V passes through a measuring circuit 2 and is divided into two branches, one branch is output to a rear-stage alternating current load after passing through an alternating current output detection and protection circuit, the measuring circuit 2 is used for measuring the voltage values, the current values and the active power values of the transformer output, the other branch is supplied to intrinsic safety output detection and protection modules and a charging circuit after passing through an AD/DC power module, and a main control MCU is used for monitoring the efficiency and the operation condition of the transformer according to measurement data of the measuring circuit 1 and the measuring circuit 2. The embodiment realizes a lithium ion battery power supply suitable for supplying power to multiple intrinsically safe loads and supplying power to an alternating current 127V load.

Inventors

  • LANG FUWEI
  • WANG JIANJUN

Assignees

  • 河南康洛迈科技有限公司

Dates

Publication Date
20260508
Application Date
20251104

Claims (9)

  1. 1. A mining flameproof and intrinsically safe lithium ion battery power supply is characterized in that: 3 low-voltage grade accesses are supported, namely 1140V, 660V and 127V respectively; The 3 input voltages are supplied to the transformer after passing through the measuring loop 1, wherein the measuring loop 1 is used for measuring the voltage value, the current value and the active power value of the input voltage; the transformer outputs alternating current 127V, the alternating current 127V is divided into two branches after passing through the measuring circuit 2, and one branch is output to be supplied to a post-stage alternating current load after passing through the alternating current output detection and protection circuit, wherein the measuring circuit 2 is used for measuring a voltage value, a current value and an active power value output by the transformer; the other branch is supplied to each intrinsic safety output detection protection module and the charging circuit after passing through the AD/DC power supply module; The main control MCU is used for monitoring the efficiency and the running condition of the transformer according to the measurement data of the measurement circuit 1 and the measurement circuit 2.
  2. 2. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 1, further comprising a 6-path intrinsically safe output detection protection module; the intrinsic safety output detection protection module is divided into three specifications of 12V, 18V and 24V; the mode of plug-in type quick electric connection and standard part fastening is adopted between each intrinsic safety output detection protection module and the main board; and a unified communication protocol is adopted between the intrinsic safety output detection protection modules with different voltage levels and the main control MCU, wherein after the system is started or the intrinsic safety output detection protection modules with new specifications are inserted, the main control MCU is used for collecting the working parameter information of each intrinsic safety output detection protection module.
  3. 3. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 2, wherein the intrinsically safe output detection and protection module further comprises an output state monitoring function, wherein, The dual overvoltage and overcurrent protection signals of the intrinsic safety output detection protection module are transmitted to the switch K1 and the switch K2 and are used for executing protection operation, and are transmitted to the intrinsic safety output monitoring MCU; The intrinsic safety output monitoring MCU is used for judging whether the power supply is subjected to overvoltage or overcurrent protection according to the logic level states sent by the received overvoltage detection circuit 1, the overvoltage detection circuit 2, the overcurrent detection circuit 1 and the overcurrent detection circuit 2, and then judging that the protection switch K1 or K2 is in a closed state according to the state that the power supply output current monitored by the measuring circuit 3 is changed from a non-zero value to a zero value in response to the fact that the overvoltage or overcurrent protection is determined.
  4. 4. The mining flameproof and intrinsically safe lithium ion battery power supply according to claim 3, wherein for each intrinsically safe direct current regulated power supply output, the length and the sectional area of a cable for supplying power to a load, which is externally connected, are set, the cable core is in a state of single-core use or parallel use, and the lowest working voltage and the rated working current of the intrinsically safe load are set, The intrinsic safety output monitoring MCU and the main control MCU can output source side voltage and load current according to intrinsic safety measured by the measuring circuit 3, and respond to the determination that the tail end voltage supplied to the load side is lower than the set minimum working voltage by combining the measured line voltage drop from the source side to the load side, and send out alarm information.
  5. 5. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 4, the mining flameproof and intrinsically safe lithium ion battery power supply is characterized by further comprising: The system comprises an intrinsic safety type Ethernet communication port and an intrinsic safety type RS485 communication port, wherein the RS485 communication port is used for being connected into substation equipment and then being converged into a monitoring system; the Ethernet port comprises an optical port and an electric port, and is used for directly accessing the switch and converging into the monitoring system.
  6. 6. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 5, the mining flameproof and intrinsically safe lithium ion battery power supply is characterized by further comprising: And the Bluetooth communication port is used for being connected with the mobile terminal equipment underground the coal mine so as to perform on-site operation on the mining flameproof and intrinsically safe lithium ion storage battery power supply.
  7. 7. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 6, the mining flameproof and intrinsically safe lithium ion battery power supply is characterized by further comprising: The infrared remote control port is used for carrying out in-situ operation on the mining flameproof and intrinsically safe lithium ion battery power supply through the intrinsically safe infrared remote controller under the coal mine.
  8. 8. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 7, the mining flameproof and intrinsically safe lithium ion battery power supply is characterized by further comprising: the 4G/5G communication port is used for entering the monitoring system by connecting a 4G or 5G mobile communication network in the coal mine; The 4G/5G communication port is further used for being connected with a cloud server to realize a backup function on power supply historical operation data and remotely monitor the power supply operation state through the cloud server.
  9. 9. The mining flameproof and intrinsically safe lithium ion battery power supply of claim 8, the mining flameproof and intrinsically safe lithium ion battery power supply is characterized by further comprising: the temperature and humidity sensor is used for monitoring the relative humidity inside the battery cavity and the equipment cavity in real time and automatically sending out desiccant replacement reminding information in response to the fact that the determined humidity exceeds the set limit value.

Description

Mining flameproof and intrinsically safe lithium ion storage battery power supply Technical Field The embodiment of the application relates to the field of lithium ion battery power supplies, in particular to a mining flameproof and intrinsically safe lithium ion battery power supply. Background In the situations of a shaft bottom car yard, a lifting machine room, a main ventilation machine room, a transformer substation, a charging chamber, a machine head and a machine tail of an adhesive tape conveyor, a mining working surface and the like, a plurality of intrinsic safety type electric loads can be intensively deployed, wherein the intrinsic safety type electric loads comprise a camera, a temperature sensor, a gas sensor, a carbon monoxide sensor, an LED (LIGHT EMITTING Diode) light supplementing lamp, emergency broadcasting and the like, the power supply of the intrinsic safety loads basically adopts a distributed power supply mode (shown in figure 3), namely, an intrinsic safety device is powered by an explosion-proof and intrinsic safety type direct current stabilized power supply, or is powered by an explosion-proof pouring and intrinsic safety type power supply, the alternating current input of the distributed power supplies needs to introduce 127V (volts) from a lighting switch, the lighting switch needs to introduce 1140V or 660V of alternating current power supply voltage from a low-voltage feed switch, and the 127V voltage needs to be distributed through a plurality of explosion-proof junction boxes, so that the on-site maintenance work load is very large, and the whole power supply reliability is obviously reduced. Most of coal mine monitoring and communication equipment, especially safety monitoring systems, personnel position monitoring systems and video monitoring systems play an important role in safe, normal and orderly operation of mines, and most of power supply of related products and devices of the systems is derived from alternating current 127V output of a lighting switch. Most of intrinsically safe power supplies used in the coal mine at present only realize dual overvoltage and overcurrent protection basic functions, and the output state and stability of the intrinsically safe power supply are lack of monitoring means, so that the intrinsically safe power supply cannot be found in time when in an unstable working state until the intrinsically safe power supply is thoroughly exposed due to the problem of shutdown caused by faults. The intrinsic safety power supply instability mainly changes into an intrinsic safety power supply 'hiccup' protection phenomenon caused by charging impact current of an intrinsic safety power supply loop cable distribution capacitor and an intrinsic safety power supply An Fuzai input capacitor when the intrinsic safety power supply initially supplies power to an intrinsic safety load, a 'hiccup' protection phenomenon caused by mismatching of the intrinsic safety power supply An Fuzai input inductance and the intrinsic safety power supply input capacitance with the intrinsic safety power supply output inductance and the output capacitance, and a frequent 'hiccup' protection phenomenon caused by intrinsic safety load performance degradation, particularly power consumption increase. When the intrinsic safety power supply is used for supplying power to an intrinsic safety load in the existing coal mine site, according to different power supply distances, power supply cables with different lengths are needed, power consumption current of different power supplies An Fuzai is different, voltage drop formed on a cable with a certain length is also different, when the An Fuzai power consumption is larger or the power supply cable length is longer, excessive voltage drop can be formed on the cable, so that terminal voltage supplied to the intrinsic safety load cannot meet the normal working requirement of the intrinsic safety load, and the power supply cable with larger cross section area is needed to be replaced temporarily, so that time and labor are wasted. In coal mines, particularly in underground coal mines, the humidity in the air is generally high, explosion-proof equipment is very sensitive to humidity, particularly condensation caused by the breathing effect, and the electrical insulation performance of the equipment is reduced, even faults occur. At present, a main means of dehumidification of coal mine electrical equipment is that a desiccant is placed in the equipment, the desiccant fails after absorbing excessive moisture and needs to be replaced, the failure period of the desiccant is related to the use frequency of the equipment, seasons, the production state of the coal mine and the like, and at present, a mode of manually checking the color of the desiccant on site frequently is mainly adopted to judge whether the desiccant fails or not and whether the desiccant needs to be replaced or not, so that the efficiency is low and the risk of misjudgment