CN204205645U - A kind of coal mine flame-proof type lithium battery starts power supply - Google Patents

Abstract

The utility model discloses a coal mine explosion-proof lithium battery starting power supply, which comprises a power supply circuit, a power supply management circuit, a control room circuit, a charging and discharging protection circuit, a charging circuit and a starting circuit. There is a lithium battery management unit on the power management circuit, and an intermediate relay and a DC contactor on the charge and discharge protection circuit. Through the lithium battery management unit, the voltage, temperature, and current detection and alarm of the single battery can be realized; and when the lithium battery After the charging of the battery pack is completed, the lithium battery management unit will automatically control the disconnection of the intermediate relay, so that the DC contact is disconnected, and the charging of the lithium battery pack is terminated; when the lithium battery pack is in abnormal use, the lithium battery management unit controls the intermediate relay. Disconnect to disconnect the DC contact, realize the termination of charge and discharge of the lithium battery pack, and protect the lithium battery pack. In addition, through the first diode and the second diode, the charger can be used to supply power to the lithium battery management unit when the lithium battery pack is completely out of power.

Description

A coal mine explosion-proof lithium battery starting power supply

technical field

The utility model relates to a coal mine explosion-proof lithium battery starting power supply.

Background technique

At present, the starting power supply of diesel locomotives in coal mines is mostly flameproof starting lead-acid batteries, which have the disadvantages of small capacity, large self-discharge, short life and serious environmental pollution. Lithium-ion batteries have remarkable characteristics such as high specific power and specific energy, green and pollution-free, and long service life. They are the best substitute products for lead-acid batteries and the development direction of new secondary batteries. Anbiao National Center issued five documents including "Safety Technical Requirements for Mining Lithium-ion Batteries (Trial)" and "Safety Technical Requirements for Mining Explosion-proof (and Intrinsically Safe) Lithium-ion Batteries (Trial)", which marks the lithium-ion The application of ion storage battery in the underground has entered a substantive stage. Therefore, it is of great significance for coal mines to apply lithium batteries to the starting power supply of coal mines.

Utility model content

The purpose of the utility model is to propose a coal mine explosion-proof lithium battery starting power supply, which can be used as a starting power supply for coal mine diesel locomotives to replace the existing lead-acid storage battery starting power supply.

In order to achieve the above object, the utility model adopts the following technical solutions:

A coal mine explosion-proof lithium battery starting power supply, including a power supply circuit, a power management circuit, a control room circuit, a charging and discharging protection circuit, a charging circuit and a starting circuit; wherein,

Power circuit, including a lithium battery pack and a master mechanical switch;

A power management circuit, connected in parallel to the power circuit, includes a lithium battery management unit and a first diode;

The control room circuit is connected in parallel to the power circuit, including a first switch and a control room interface;

A charging circuit, including a second switch and a charger interface;

A starting circuit, including a third switch and a starter interface;

Charge and discharge protection circuit, including an intermediate relay and a DC contactor;

The intermediate relay is connected in parallel to the lithium battery management unit;

After the DC contactor is connected in series with the parallel circuit formed by the charging circuit and the starting circuit, they are connected in parallel to the power circuit;

After the charger interface is connected in series with a second diode, they are connected in parallel to the lithium battery management unit;

The lithium battery management unit is used to complete the voltage, temperature, and current detection and alarm of the single battery of the lithium battery pack, and control the charge and discharge protection circuit to realize the charge/discharge protection of the lithium battery pack.

Further, when the lithium battery pack is completely out of power, the lithium battery management unit is powered through the charger interface, the first diode and the second diode.

Further, when the lithium battery pack is in abnormal use, the lithium battery management unit disconnects the DC contactor by controlling the intermediate relay to disconnect, so as to realize the termination of charging and discharging of the lithium battery pack;

Among them, abnormal use conditions include over-temperature, over-voltage, or under-voltage of the lithium battery pack.

Further, when the charging of the lithium battery pack is completed, the lithium battery management unit automatically controls the disconnection of the intermediate relay to disconnect the DC contactor, and the charging of the lithium battery pack is terminated.

Further, the above-mentioned lithium battery management unit includes an MCU, and the MCU is provided with an SPI interface, at least one CAN bus interface, two GPIO interfaces, two AD interfaces and a DC/DC interface; wherein,

A dedicated chip for voltage detection of series battery packs is connected to the SPI interface;

A TFT liquid crystal display unit is connected to the CAN bus interface through a CAN bus;

A temperature sensor is connected to a GPIO interface;

Connect the intermediate relay on another GPIO interface;

A first single-supply current Hall sensor is connected to an AD interface;

A second single-supply current Hall sensor is connected to another AD interface;

A DC/DC power supply is connected to the DC/DC interface;

Wherein, the first single-supply current Hall sensor and the second single-supply Hall sensor have different measuring ranges.

Further, a coal mine explosion-proof lithium battery starting power supply also includes an explosion-proof box, including a battery chamber, a control chamber and a wiring chamber; wherein,

The lithium battery pack is located inside the battery cavity;

The lithium battery management unit, the total mechanical switch, the first switch, the second switch and the third switch are located inside the control chamber;

The control room interface, charger interface and starter interface are located inside the wiring compartment.

The utility model has the following advantages:

The starting power supply mentioned in the utility model includes a power supply circuit, a power supply management circuit, a control room circuit, a charging and discharging protection circuit, a charging circuit and a starting circuit. There is a lithium battery management unit on the power management circuit, and an intermediate relay and a DC contactor on the charge and discharge protection circuit. Through the lithium battery management unit, the voltage, temperature, and current detection and alarm of the single battery can be realized; and when the lithium battery After the charging of the battery pack is completed, the lithium battery management unit will automatically control the disconnection of the intermediate relay, so that the DC contact is disconnected, and the charging of the lithium battery pack is terminated; when the lithium battery pack is in abnormal use, the lithium battery management unit controls the intermediate relay. Disconnect to disconnect the DC contact, realize the termination of charge and discharge of the lithium battery pack, and protect the lithium battery pack. In addition, through the first diode and the second diode, the charger can be used to supply power to the lithium battery management unit when the lithium battery pack is completely out of power, ensuring that the lithium battery management unit can work normally under any circumstances. The utility model meets the special requirements of coal mines, has complete functions, and has the advantages of small volume, large discharge current, large capacity, small volume, long life and little pollution.

Description of drawings

Fig. 1 is the circuit block diagram of coal mine explosion-proof type lithium battery starter power supply in the utility model;

Fig. 2 is a structural block diagram of the lithium battery management unit in Fig. 1;

Fig. 3 is the physical connection diagram of the coal mine explosion-proof type lithium battery starter power supply in the utility model;

Among them, 1-lithium battery pack, 2-general mechanical switch, 3-lithium battery management unit, 4-first diode, 5-first switch, 6-control room interface, 7-intermediate relay, 8-DC contact Device, 9-second switch;

10-charger interface, 11-third switch, 12-starter interface, 13-second diode, 14-special chip for voltage detection of series battery pack, 15-TFT liquid crystal display unit, 16-temperature sensor, 17- The first single-supply current Hall sensor, 18-the second single-supply current Hall sensor, 19-DC/DC power supply;

20-battery chamber, 21-control chamber, 22-wiring chamber.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, a coal mine flameproof lithium battery starting power supply includes a power supply circuit, a power management circuit, a control room circuit, a charging and discharging protection circuit, a charging circuit and a starting circuit. in,

The power supply circuit includes a lithium battery pack 1 and a master mechanical switch 2.

The power management circuit is connected in parallel to the power circuit, and includes a lithium battery management unit 3 and a first diode 4 .

The control room circuit is connected in parallel to the power supply circuit, and includes a first switch 5 and a control room interface 6, and the control room interface 6 can be connected to lighting lamps and other equipment.

The charging circuit includes a second switch 9 and a charger interface 10, and the charger interface 10 is connected to the charger for charging the lithium battery pack.

The starting circuit includes a third switch 11 and a starter interface 12, and the starter interface 12 is connected to the starter for realizing the starting function. The charging circuit is connected in parallel with the starting circuit.

The charging and discharging protection circuit includes an intermediate relay 7 and a DC contactor 8, wherein,

The intermediate relay 7 is connected in parallel on the lithium battery management unit 3;

The parallel circuit formed by the charging circuit and the starting circuit is connected in parallel with the DC contactor 8 and then connected in parallel to the power supply circuit.

After the charger interface 12 is connected in series with a second diode 13 , they are connected to the lithium battery management unit 3 in parallel.

The lithium battery management unit 3 is used to detect and alarm the voltage, temperature, and current of the single cells of the lithium battery pack, and control the charge and discharge protection circuit to realize the charge/discharge protection of the lithium battery pack.

Its general working process is as follows:

When in use, the user first closes the main mechanical switch 2, and at this time, the lithium battery management unit 3 starts to work. Then the first switch 5 is closed, and the lithium battery pack 1 supplies power to the control room.

When the lithium battery pack 1 works normally, the lithium battery management unit 3 controls the pull-in of the intermediate relay 7 to make the DC contact 8 conductive. At this time, the user only needs to manually close the third switch 11 to complete the starting function.

After the startup is completed, the activated power equipment drives the charger to start working, and the user can manually close the second switch 9 to realize the charging of the lithium battery pack 1 by the charger.

When the charging of the lithium battery pack 1 is completed, the lithium battery management unit 3 will automatically control the intermediate relay 7 to disconnect, so that the DC contact 8 is disconnected, and the charging of the lithium battery pack 1 is terminated.

When the lithium battery pack is in abnormal use, the lithium battery management unit 3 disconnects the DC contact 8 by controlling the intermediate relay 7, so that the charging and discharging of the lithium battery pack 1 is terminated, so that the lithium battery pack 1 is protected;

Among them, abnormal use conditions include over-temperature, over-voltage, or under-voltage and so on.

Among them, the diodes D1 and D2 realize the function of using an external power source such as a charger to supply power to the lithium battery management unit 3 when the lithium battery pack 1 is completely out of power, ensuring that the lithium battery management unit 3 can work normally under any circumstances.

As shown in FIG. 2 , the lithium battery management unit 3 includes an MCU, and the MCU is provided with an SPI interface, at least one CAN bus interface, two GPIO interfaces, two AD interfaces and a DC/DC interface. in,

On the SPI interface, a special chip 14 for voltage detection of series battery packs is connected, and the voltage detection is performed by the special chip 14 for voltage detection of series battery packs;

A TFT liquid crystal display unit 15 is connected to the CAN bus interface through a CAN bus;

A temperature sensor 16 is connected to a GPIO interface, and temperature detection is performed through the temperature sensor 16 of single-bus communication;

Connect the intermediate relay 7 to another GPIO interface;

A first single-supply current Hall sensor 17 is connected to an AD interface;

A second single-supply current Hall sensor 18 is connected to another AD interface;

A DC/DC power supply 19 is connected to the DC/DC interface;

Wherein, the first single-supply current Hall sensor 17 and the second single-supply Hall sensor 18 have different ranges, and current detection is performed by two single-supply current Hall sensors HALL1 and HALL2 with different ranges.

The TFT liquid crystal display unit 15 is connected with the lithium battery management unit 3 through the CAN bus, and the TFT liquid crystal display unit 15 also has its own MCU to control the TFT screen, and receives the information sent by the lithium battery management unit 3 through the CAN bus provided by the MCU. data.

Through the control of the TFT screen by the MCU, the first interface designed mainly displays the voltage of the single battery, the temperature of the single battery, and the charging and discharging current, and the second alarm interface mainly displays alarms such as overvoltage, overtemperature, and disconnection of the detection line. .

In addition, the coal mine explosion-proof lithium battery starting power supply also includes an explosion-proof box.

The explosion-proof box includes a battery chamber 20 , a control chamber 21 and a wiring chamber 22 . in,

The lithium battery pack 1 and the temperature sensor 16 are located inside the battery cavity 20;

The lithium battery management unit 3, the main mechanical switch 2, the first switch 5, the second switch 9 and the third switch 11 are located inside the control cavity 21;

The control room interface 6 , the charger interface 10 and the starter interface 12 are located inside the wiring cavity 22 .

Of course, the above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that any person skilled in the art can make all Equivalent substitutions and obvious deformation forms all fall within the essential scope of this specification and should be protected by the utility model.

Claims (6)

1. A coal mine explosion-proof type lithium battery starter power supply is characterized in that it comprises a power supply circuit, a power management circuit, a control room circuit, a charging and discharging protection circuit, a charging circuit and a starting circuit; wherein, Power circuit, including a lithium battery pack and a master mechanical switch; A power management circuit, connected in parallel to the power circuit, includes a lithium battery management unit and a first diode; The control room circuit is connected in parallel to the power circuit, including a first switch and a control room interface; A charging circuit, including a second switch and a charger interface; A starting circuit, including a third switch and a starter interface; Charge and discharge protection circuit, including an intermediate relay and a DC contactor; The intermediate relay is connected in parallel to the lithium battery management unit; After the DC contactor is connected in series with the parallel circuit formed by the charging circuit and the starting circuit, they are connected in parallel to the power circuit; After the charger interface is connected in series with a second diode, they are connected in parallel to the lithium battery management unit; The lithium battery management unit is used to complete the voltage, temperature, and current detection and alarm of the single battery of the lithium battery pack, and control the charge and discharge protection circuit to realize the charge/discharge protection of the lithium battery pack. 2. A kind of coal mine explosion-proof type lithium battery starter power supply according to claim 1 is characterized in that, when the lithium battery pack is completely out of power, through the charger interface, the first diode and the second diode are The lithium battery management unit supplies power. 3. A coal mine explosion-proof lithium battery starter power supply according to claim 1, characterized in that, when the lithium battery pack is in abnormal use, the lithium battery management unit disconnects the DC contactor by controlling the intermediate relay. Disconnect to realize the termination of charge and discharge of the lithium battery pack; Among them, abnormal use conditions include over-temperature, over-voltage, or under-voltage of the lithium battery pack. 4. A kind of coal mine explosion-proof type lithium battery starter power supply according to claim 1, it is characterized in that, after the charging of the lithium battery pack is completed, the lithium battery management unit automatically controls the disconnection of the intermediate relay to disconnect the DC contactor, and the lithium battery Charging of the battery pack is terminated. 5. A kind of coal mine explosion-proof type lithium battery starter power supply according to claim 1, it is characterized in that, described lithium battery management unit comprises an MCU, is provided with an SPI interface, at least one CAN bus interface, Two GPIO interfaces, two AD interfaces and one DC/DC interface; among them, A dedicated chip for voltage detection of series battery packs is connected to the SPI interface; A TFT liquid crystal display unit is connected to the CAN bus interface through a CAN bus; A temperature sensor is connected to a GPIO interface; Connect the intermediate relay on another GPIO interface; A first single-supply current Hall sensor is connected to an AD interface; A second single-supply current Hall sensor is connected to another AD interface; A DC/DC power supply is connected to the DC/DC interface; Wherein, the first single-supply current Hall sensor and the second single-supply Hall sensor have different measuring ranges. 6. A coal mine explosion-proof lithium battery starting power supply according to any one of claims 1 to 5, characterized in that it also includes an explosion-proof box, including a battery chamber, a control chamber and a wiring chamber; wherein, The lithium battery pack is located inside the battery cavity; The lithium battery management unit, the total mechanical switch, the first switch, the second switch and the third switch are located inside the control chamber; The control room interface, charger interface and starter interface are located inside the wiring compartment.