CN102923133A - Mining lithium-ion battery electric locomotive power assembly system - Google Patents

Abstract

The invention relates to a mine-used lithium-ion battery electric locomotive power assembly system, comprising a mine-used lithium-ion battery electric locomotive power drive system and two sets of mine-used lithium-ion battery electric locomotive power assemblies; mine-used lithium-ion battery electric locomotive power assembly; The vehicle power supply assembly is composed of explosion-proof box, lithium battery module, lithium battery module management system and assembly control management system; the lithium battery module management system is used to realize the voltage detection of single lithium battery, Balance management, single lithium battery temperature detection, battery pack charge and discharge current detection, circulation blocking caused by voltage difference when multiple battery packs are connected in parallel, charging signal detection and automatic enable and output control interface; When faults such as current flow occur, the lithium battery module management system directly protects the lithium battery module; the mine-used lithium-ion battery electric locomotive powertrain system has the advantages of no pollution and long service life.

Description

A mine-used lithium-ion battery electric locomotive powertrain system

technical field

The invention belongs to a power assembly system, which is suitable for electric locomotives, and in particular relates to a mine-used lithium-ion storage battery electric locomotive power assembly system, which belongs to the field of electrical technology.

Background technique

Mine electric locomotives are an important means of transportation in the coal mining industry, and more and more are used in coal mines. Mine electric locomotives usually use lead-acid batteries as power sources, and lead-acid batteries still dominate at present. Lead-acid battery electric locomotives do not require battery management system control and are relatively simple to use.

In the course of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

1. During use: Acid leakage often occurs, which will burn clothes, and the terminal post is often corroded by sulfuric acid, which often causes poor contact and cannot be used for normal charging, which increases the workload of maintenance personnel.

2. The initial charging and daily charging are very harmful to the human body. Due to the strong volatility and toxicity of sulfuric acid, the pungent odor produced poses a threat to the physical and mental health of the staff.

3. Chemical reaction between sulfuric acid and lead by adding current: Since this equipment is mixed with sulfuric acid and distilled water to generate current to make the coal mine equipment work normally, the combination of acid and water in the initial charging and daily charging must be configured strictly according to the coal mine equipment manual. Otherwise, the service life of coal mine equipment will be shortened. Since the ratio of sulfuric acid and distilled water needs to be adjusted frequently, professionals are required to be responsible for maintenance, which requires a lot of manpower and material resources.

4. The lead-acid battery can be used for 500 cycles, but in actual use, it can only reach 400 cycles, and the service life is low.

5. The service life of lead-acid battery coal mine equipment is generally 2 years.

6. Since lead-acid batteries are made of unenvironmentally friendly lead and acid, the product price is relatively cheap, and the old batteries after use are very polluting to the environment.

Lead-acid batteries are limited in use due to the above disadvantages.

Contents of the invention

The technical problem to be solved by the present invention is to aim at the above deficiencies, to provide a mining lithium-ion battery electric locomotive powertrain system, which overcomes the defects of high toxicity, low service life and difficulty in detecting the charging and discharging state of the lead-acid battery in the prior art , The electric locomotive power assembly system adopting the mine lithium-ion storage battery of the present invention has the advantages of no pollution and long service life.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a mining lithium-ion battery electric locomotive powertrain system, characterized in that: the lithium-ion battery electric locomotive powertrain system includes a set of mining lithium-ion battery Electric locomotive power drive system and two sets of mining lithium-ion battery electric locomotive power assembly;

The power supply assembly of electric locomotive with lithium-ion battery for mining is composed of explosion-proof box, lithium battery module, lithium battery module management system and assembly control management system;

Explosion-proof box includes explosion-proof assembly control box and explosion-proof battery box;

The explosion-proof battery box includes the battery chamber, the explosion-proof battery box control chamber and the explosion-proof battery box wiring chamber. The lithium battery module is placed in the battery chamber, the lithium battery module management system is placed in the explosion-proof battery box control chamber, and the explosion-proof battery box wiring chamber is used for external connection;

The explosion-proof assembly control box includes the explosion-proof assembly control box control cavity and the explosion-proof assembly control box wiring cavity. The assembly control management system is placed in the explosion-proof assembly control box control cavity, and the explosion-proof assembly control box wiring cavity is used for external connection ;

The lithium battery module is composed of a lithium battery, a fuse, a digital temperature sensor and connecting wires. The lithium battery is composed of multiple single lithium batteries connected in series. The output between the lithium battery modules is adjusted by the assembly control management system. The output connection mode is a subset of all lithium battery module combinations;

The lithium battery module management system is used to realize the voltage detection of a single lithium battery, the balanced management during the charging and discharging process of a single lithium battery, the temperature detection of a single lithium battery, the charging and discharging current detection of a battery pack, and the parallel output of multiple battery packs. Circulation blocking caused by voltage difference, charging signal detection and automatic enable and output control interface.

An optimization solution, the assembly control and management system includes an assembly controller, a charging guiding circuit and a charging and discharging interface, a user communication interface, a fault alarm and status display unit, and an explosion-proof interface.

Another optimization scheme, the mine-used lithium-ion battery electric locomotive power drive system is equipped with a contactor switch, a contactor switch, a contactor switch, two DC series-excited motors, and the two DC series-excited motors include the first motor and a second motor;

The first motor is the two front wheel drive motors of the electric locomotive, controlled by IGBT1 chopper, the second motor is the two rear wheel drive motors of the electric locomotive, controlled by IGBT2, the first motor and the second motor can work independently or simultaneously ;

The contactor switch, the contactor switch, and the contactor switch are used to select the power supply for driving the motor, the first lithium-ion power supply is used as a dedicated power supply for the first motor, and the second lithium-ion power supply is used as a dedicated power supply for the second motor;

The first lithium-ion power supply can be used as a backup power supply for the second motor through the contactor switch or the second lithium-ion power supply can be used as a backup power supply for the first motor through the contactor switch.

The driving speed of the electric locomotive is adjusted through the IGBT chopper control, the lithium ion power supply is selected through the switching of the contactor switch, and the driving motor is an explosion-proof motor.

After the present invention adopts the above technical scheme, compared with the prior art, it has the following advantages: the lithium battery module management system can realize the voltage detection of the single lithium battery, the balance management in the charging and discharging process of the single lithium battery, the single lithium battery Temperature detection, charge and discharge current detection of battery packs, circulation blocking caused by voltage differences when multiple battery packs are connected in parallel, charging signal detection and automatic enable and output control interface, as an execution unit, it does not have a balanced decision-making function, that is, lithium The working state of the battery module management system is directly determined by the assembly control management system, but when faults such as undervoltage and overcurrent occur, the lithium battery module management system can directly protect the lithium battery module, and the system as a whole has pollution-free, usable The advantage of long life.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Accompanying drawing 1 is the internal composition diagram of explosion-proof battery box in the embodiment of the present invention;

Accompanying drawing 2 is the internal composition diagram of explosion-proof assembly control box in the embodiment of the present invention;

Accompanying drawing 3 is the power drive system of mine-used lithium-ion storage battery electric locomotive in the embodiment of the present invention

Schematic;

In the figure,

1-Lithium battery module, 2-Lithium battery module management system, 3-Assembly control management system, 4-Explosion-proof battery box, 5-Explosion-proof assembly control box, 6-Battery chamber, 7-Explosion-proof battery box control chamber, 9 -Explosion-proof assembly control box control chamber, 11-lithium battery, 12-fuse, 13-digital temperature sensor, 14-assembly controller, 15-charging guiding circuit, 16-charging and discharging interface, 17-user communication interface , 18-fault alarm and status display unit, 19-electric locomotive controller, 20-charging device, 21-traction motor, 22-first lithium-ion power supply, 23-second lithium-ion power supply.

Detailed ways

Embodiment, as shown in Fig. 1 and Fig. 2, a power assembly system of electric locomotive with lithium-ion battery for mining includes a power drive system for electric locomotive with lithium-ion battery for mining and two sets of power supplies for electric locomotive with lithium-ion battery for mining Assembly.

The power assembly of electric locomotive with lithium-ion batteries for mines adopts the strategy of modular grouping and layered centralized control. It is composed of explosion-proof box, lithium battery module 1, lithium battery module management system 2 and assembly control management system 3. The management system 2 and the assembly control management system 3 are collectively referred to as the lithium power management system.

The explosion-proof box includes an explosion-proof assembly control box 5 and two explosion-proof battery boxes 4. In the figure, only two explosion-proof battery boxes 4 are matched with one explosion-proof assembly control box 5, and multiple explosion-proof battery boxes 4 and one explosion-proof battery box 4 can also be used. Assembly control box 5 cooperates.

The explosion-proof battery box 4 is divided into three explosion-proof chambers: the battery chamber 6, the explosion-proof battery box control chamber 7 and the explosion-proof battery box wiring chamber. The lithium battery module 1 is placed in the battery chamber 6, and the lithium battery module management system 2 is placed in the explosion-proof battery chamber. In the box control cavity 7, the explosion-proof battery box wiring cavity is used for external connection.

The explosion-proof assembly control box 5 is divided into two explosion-proof chambers: the explosion-proof assembly control box control chamber 9 and the explosion-proof assembly control box wiring chamber, the assembly control management system 3 is placed in the explosion-proof assembly control box control chamber 9, the explosion-proof assembly The wiring cavity of the control box is used for external connection.

The interface between the explosion-proof battery box 4 and the explosion-proof assembly control box 5 includes a D-type control signal line and a C-type power bus, and the connection has explosion-proof requirements;

The interface between the lithium battery module 1 and the lithium battery module management system 2 includes a type A cell voltage detection signal line, a type B cell temperature detection signal line, and a type C power bus, all of which are located inside the explosion-proof battery box 4 , the connection has explosion-proof requirements.

The E-type interface between the explosion-proof assembly control box 5 and the charging device, and the F-type interface between the explosion-proof assembly control box 5 and the electric locomotive controller all have explosion-proof requirements.

The lithium battery module 1 is located in the battery cavity 6 in the explosion-proof battery box 4, and is composed of a lithium battery 11, a fuse 12, a digital temperature sensor 13 and connecting wires, and does not contain any other electronic devices. The lithium battery 11 is composed of multiple The capacity of each single lithium battery is not more than 100Ah, and the output between the lithium battery modules 1 is adjusted by the assembly control management system 3, and the output connection mode is the combination of all lithium battery modules 1. set.

If N batteries are connected in series, the number of single voltage detection buses is N+1, the single temperature detection uses digital temperature sensors 13 with 3 buses, and there are 2 output power buses. Each lithium battery module 1 needs a lithium battery module management system 2 to manage and maintain the battery status.

The lithium battery module management system 2 can realize the voltage detection of a single lithium battery, the balanced management of a single lithium battery during charging and discharging, the temperature detection of a single lithium battery, the detection of the charging and discharging current of a battery pack, and the parallel output of multiple battery packs. Circulation blocking caused by voltage difference, charging signal detection and automatic enabling, and output control interface, as an execution unit, it does not have the function of balancing decision-making, that is, the working state of the lithium battery module management system 2 is directly determined by the assembly control management system 3 , but when faults such as undervoltage and overcurrent occur, the lithium battery module management system 2 can directly protect the lithium battery module 1 without the participation of the assembly control management system 3 at this time.

The assembly control management system 3 includes an assembly controller 14, a charging guiding circuit 15, a charging and discharging interface 16, a user communication interface 17, a fault alarm and status display unit 18, and an explosion-proof interface. The model of the assembly controller 14 is STM32F107.

The assembly control management system 3 provides C-type and D-type interfaces for each explosion-proof battery box 4. The status of these interfaces is equivalent. The explosion-proof battery box 4 can be connected to any interface, but these interfaces are interconnected. For those that are not connected, their state is controlled by the assembly controller 14. For example, the class C power busbars are not simply connected in parallel internally, but the connection status of each busbar is controlled by power devices. The assembly control management system 3 can obtain the operation information of any single lithium battery in the lithium battery module 1 through the D-type control interface, monitor the status of each lithium battery module 1, and realize battery status display and data storage. Storage function, when an abnormality occurs, the alarm will be cut off at the same time the connection between the module and the bus.

Since the E-type charging and discharging interface 16 includes power lines, communication lines and control lines, when the battery is charging or discharging, the assembly controller 14 can exchange data and energy with the charging device 20 or the load through the E-type interface. The electric locomotive controller 19 does not need to exchange data, and only uses the F-type power bus connection to supply power to the traction motor 21 of the mine electric locomotive. Other user equipment or PCs can be connected through the user communication interface 17 .

As shown in Figure 3, the mine-used lithium-ion battery electric locomotive power drive system is equipped with two DC series motors, contactors and IGBTs, and the two DC series motors include a first motor M1 and a second motor M2;

The first motor M1 is the two front wheel drive motors of the electric locomotive, controlled by IGBT1 chopper, the second motor M2 is the two rear wheel drive motors of the electric locomotive, controlled by IGBT2, the first motor M1 and the second motor M2 can be Either one works alone, or both can work at the same time. When the output power demand is large, the dual-motor working mode is generally used.

Contactor switch K1, contactor switch K12, and contactor switch K2 are mainly used to select the power supply for driving the motor. Usually, the contactor switch K12 is disconnected, and the first lithium-ion power supply 22 is used as a dedicated power supply for the first motor M1. The lithium-ion power supply 23 is used as a dedicated power supply for the second motor M2. In case of failure or maintenance, the first lithium-ion power supply 22 can be used as a backup power supply for the second motor M2, and the second lithium-ion power supply 23 can be used as a backup power supply for the first motor M1. .

The driving speed of the electric locomotive is adjusted through IGBT chopper control, the lithium ion power supply is selected through the switching of the contactor switch, and the driving motor is an explosion-proof motor.

Those skilled in the art should realize that the above-mentioned specific embodiments are only exemplary, and are intended to enable those skilled in the art to better understand the content of the present invention, and should not be construed as limiting the protection scope of the present invention. The improvements made in the technical solution of the invention all fall into the protection scope of the present invention.

Claims (4)

1. A lithium-ion storage battery electric locomotive powertrain system for mining is characterized in that: the lithium-ion storage battery electric locomotive powertrain system comprises a set of mining lithium-ion storage battery electric locomotive power drive system and two groups of mining lithium-ion storage battery electric locomotive drive systems. Ion battery electric locomotive power assembly; The power supply assembly of electric locomotive with lithium-ion battery for mining is composed of explosion-proof box, lithium battery module (1), lithium battery module management system (2) and assembly control management system (3); The explosion-proof box includes the explosion-proof assembly control box (5) and the explosion-proof battery box (4); The explosion-proof battery box (4) includes the battery chamber (6), the explosion-proof battery box control chamber (7) and the explosion-proof battery box wiring chamber. The lithium battery module (1) is placed in the battery chamber (6), and the lithium battery module management system (2 ) is placed in the control chamber (7) of the explosion-proof battery box, and the wiring chamber of the explosion-proof battery box is used for external connection; The explosion-proof assembly control box (5) includes the explosion-proof assembly control box control cavity (9) and the explosion-proof assembly control box wiring cavity, and the assembly control management system (3) is placed in the explosion-proof assembly control box control cavity (9). The wiring cavity of the explosion-proof assembly control box is used for external connection; The lithium battery module (1) is composed of a lithium battery (11), a fuse (12), a digital temperature sensor (13) and connecting wires. The lithium battery (11) is composed of multiple single lithium batteries connected in series. The lithium battery module (1 ) is adjusted by the assembly control management system (3), and the output connection mode is a subset of the combination of all lithium battery modules (1); Lithium battery module management system (2) is used to realize the voltage detection of single lithium battery, the balance management in the charging and discharging process of single lithium battery, the temperature detection of single lithium battery, the charging and discharging current detection of battery pack, and the detection of multiple battery packs. Circulation blocking caused by voltage difference when outputting in parallel, charging signal detection and automatic enable and output control interface. 2. A mining lithium-ion battery electric locomotive powertrain system according to claim 1, characterized in that: said assembly control management system (3) includes an assembly controller (14), a charging guide circuit (15) and charging and discharging interface (16), user communication interface (17), fault alarm and status display unit (18) and explosion-proof interface. 3. A mining lithium-ion battery electric locomotive powertrain system as claimed in claim 2, characterized in that: the mining lithium-ion battery electric locomotive power drive system is equipped with a contactor switch (K1), a contactor switch (K12), contactor switch (K2), two DC series motors, the two DC series motors include the first motor (M1) and the second motor (M2); The first motor (M1) is the two front wheel drive motors of the electric locomotive, controlled by IGBT1 chopper, the second motor (M2) is the two rear wheel drive motors of the electric locomotive, controlled by IGBT2, the first motor (M1) It can work alone or simultaneously with the second motor (M2); The contactor switch (K1), contactor switch (K12), and contactor switch (K2) are used to select the power supply for driving the motor, and the first lithium-ion power supply (22) is used as a dedicated power supply for the first motor (M1). Two lithium-ion power sources (23) are used as a dedicated power source for the second motor (M2); The first lithium-ion power supply (22) can be used as a backup power supply for the second motor (M2) through the contactor switch (K1), and the contactor switch (K12) or the second lithium-ion power supply (23) through the contactor switch (K2), The contactor switch (K12) can be used as a backup power supply for the first motor (M1). 4. The powertrain system of a mine-used lithium-ion battery electric locomotive as claimed in claim 3, characterized in that: the driving speed of the electric locomotive is adjusted through the IGBT chopper control, and the lithium-ion battery is selected by switching the contactor switch. The power supply, the first motor (M1) and the second motor (M2) are explosion-proof motors.

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