Pure electric power system of mine heavy truck

Abstract

According to the pure electric power system of the mine heavy truck, innovative layout and optimal design are carried out on the power system, and a direct-current battery energy storage unit system meeting a high-power, high-capacity and high-voltage platform is built by connecting a plurality of large-string battery clusters in parallel; alternating current for supplying different requirements and direct current for auxiliary power utilization of the mine heavy truck are output through a plurality of converter units of the electric control device system; the direct-current end of an electric control device unit system is connected with a high-voltage direct-current bus, the direct-current end of an inversion unit of the electric control device unit system is connected with a high-voltage direct-current power line, and the output end of the inversion unit of the electric control device unit system is connected with an electric wheel alternating-current load. The output end of the control system is connected with an electric direct current load of auxiliary power utilization, and the control system is connected with a corresponding controlled power conversion unit and a controlled switch through an electric control device control bus, so that pure power supply of the mine heavy truck is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of mining vehicles, and in particular relates to a pure electric power system of a mining heavy truck. Background Art

[0002] The power system of mining heavy trucks is characterized by high power, large capacity, and high voltage platform; the power system powered by diesel has the defects of high energy consumption, high pollution, high operating cost, and high maintenance cost. Replacing the diesel power system with a pure electric power system can be environmentally friendly and energy-saving, reduce operating costs, reduce operation and maintenance costs, and improve economic benefits. The application of the pure electric power system of mining heavy trucks requires solving the high-voltage platform battery unit system and the electronic control unit system and the charging system of the high-voltage platform, as well as the pure electric power system architecture of mining heavy trucks and the design of system power supply conversion and distribution. Since there is no mature technology and system to refer to, it is necessary to solve the innovative layout and optimized design of the power system.

[0003] In order to meet the high voltage and high current requirements of electric wheels, the pure electric power system of mining heavy trucks needs to build and adopt a DC battery energy storage unit system that meets the high power, large capacity and high voltage platform. The inverter unit output of the electronic control system supplies a wide range of high voltage AC power and auxiliary power supply for mining heavy trucks.

[0004] It needs to be solved that multiple battery string clusters that meet the high-voltage DC platform are connected to the high-voltage DC bus through a battery cluster regulation module and a DC high-voltage cabin to form a high-voltage DC platform.

[0005] A design solution is required, where the DC end of the electronic control device unit system is connected to the high-voltage DC bus, and the DC end of the inverter unit of the electronic control device unit system is connected to the high-voltage DC bus, the output end of the inverter unit is connected to the electric wheel AC load, and at the same time, the DC input end of the DC conversion unit of the electronic control device is connected to the high-voltage DC bus, and the output end of the DC conversion unit is connected to the auxiliary power supply DC load, and the electronic control device control bus is connected to the corresponding controlled power conversion unit and controlled switch to form a pure electric power supply and power distribution and control system for mining heavy trucks. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a pure electric power system for a mining heavy truck, in which a battery cluster is connected to a battery high-voltage DC bus through a corresponding high-voltage box, and a DC charging terminal is connected to the battery high-voltage DC bus at the same time. The battery high-voltage DC bus is connected to an electronic control device system through a DC switch, and the electronic control device system is respectively connected to the AC auxiliary power supply terminal, the DC auxiliary power supply terminal, the left electric wheel power supply terminal and the right electric wheel power supply terminal, and the communication interface of the electronic control device system is respectively connected to the battery cluster, the high-voltage box, the DC switch, the DC charging terminal, the AC auxiliary power supply terminal, the DC auxiliary power supply terminal, the vehicle condition information collection terminal, the control device, and the battery management system BMS through a system control bus, thereby forming a control link of the pure electric power system of the mining heavy truck.

[0007] The pure electric power system of a mining heavy truck is characterized in that the power control method and process of the pure electric power system are as follows:

[0008] S100: The system performs a self-test on power-on to check the battery power and temperature, controlled components, communication lines, and vehicle condition information; if abnormal, an alarm is given; if normal, the system selects to execute S110 driving mode or S120 charging mode;

[0009] S110: driving mode;

[0010] S111: monitor the battery power SOC value. If it is abnormal, execute S130; if it is normal, execute S112;

[0011] S112: The monitored battery power SOC value is within a set range of the battery power;

[0012] S113: distributing power according to the received control command;

[0013] S114: real-time monitoring of operating parameters, at least monitoring of battery state of charge, battery temperature, battery health, environmental parameters and operating parameters of controlled components, and comparing within a set parameter value range; if abnormal, execute S130; if normal, execute S115;

[0014] S115: Detect and determine whether to continue running. If yes, execute S111; otherwise, execute S116;

[0015] S116: Control and complete the stop operation.

[0016] S120: Charging mode;

[0017] S121: Detect whether the charging connection is normal, at least detect whether the power connection and the communication connection and the communication signal are normal; if abnormal, execute S130; if normal, execute S122;

[0018] S122: Real-time monitoring of battery power SOC value and corresponding parameters;

[0019] S123: confirming that the monitored battery power SOC value is within a set range of the battery power;

[0020] S124: accept charging power and continue charging;

[0021] S125: Real-time detection of whether the current charging task is completed, if yes, execute S126; otherwise, execute S122;

[0022] S126: Notify completion of this charging task;

[0023] S130: Alarm prompt.

[0024] The pure electric power system of a mining heavy truck is characterized in that the electronic control device system is connected to the DC / DC module, the DC / AC converter module, the left inverter module, and the right inverter module through the DC power line by the DC bus connection terminal; it is also characterized in that the DC / DC module is connected to the DC auxiliary power supply terminal, the DC / AC converter module is connected to the AC auxiliary power supply terminal, the left inverter module is connected to the left electric wheel power supply terminal through the left AC power line, and the right inverter module is connected to the right electric wheel power supply terminal through the right AC power line; it is also characterized in that the controller is connected to the DC bus connection terminal, the DC / DC module, the DC / AC converter module, the left inverter module, the right inverter module, the communication interface and the vehicle condition information collection communication terminal through the control communication line.

[0025] The pure electric power system of the mining heavy truck is characterized in that the battery cluster is composed of a first battery cluster, a second battery cluster, and an nth battery cluster, and each battery cluster is composed of a plurality of battery cells connected in series.

[0026] The pure electric power system of a mining heavy truck is characterized in that the high-voltage box is composed of a first high-voltage box, a second high-voltage box, and an nth high-voltage box, and each high-voltage box corresponds to a battery cluster.

[0027] The pure electric power system of the mining heavy truck is characterized in that the battery management system BMS is connected to each battery cell of the corresponding battery cluster to monitor the voltage and temperature parameters of the battery and the current parameters of the battery cluster.

[0028] The present invention discloses a pure electric power system for a heavy-duty truck for mining, which has an innovative layout and optimized design for the power system. A DC battery energy storage unit system that meets the high-power, large-capacity, and high-voltage platform is constructed by connecting a plurality of large-group string battery clusters in parallel. The AC power with different demands and the DC power for auxiliary power of the heavy-duty truck for mining are supplied by the output of a plurality of converter units of an electric control device system. The DC end of the electric control device unit system is connected to a high-voltage DC bus, and the DC end of an inverter unit of the electric control device unit system is connected to a high-voltage DC power line, and the output end is connected to an AC load of an electric wheel. At the same time, the DC input end of a DC conversion unit of the electric control device is connected to a high-voltage DC power line, and the output end is connected to an electric DC load for auxiliary power. The corresponding controlled power conversion unit and the controlled switch are connected through a control bus of the electric control device to realize a control system for pure electric power supply of the heavy-duty truck for mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic block diagram of the principle of the pure electric power system of a mining heavy truck.

[0030] Figure 2 The invention discloses a power control method and flow chart of a pure electric power system of a mining heavy truck.

[0031] Figure 3 The present invention is a schematic block diagram of the principle of the electronic control device system structure of a pure electric power system of a mining heavy truck. DETAILED DESCRIPTION

[0032] As an implementation example, a pure electric power system of a mining heavy truck is described in conjunction with the accompanying drawings. However, the described embodiment is a partial embodiment of the present invention applied to a pure electric power system of a mining heavy truck, rather than a complete embodiment. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention; the technology and solutions of the present invention are not limited to the contents given in this implementation example.

[0033] like Figure 1As shown, a pure electric power system of a heavy-duty mining truck comprises a battery cluster (1) connected to a battery high-voltage DC bus (5) through a corresponding high-voltage box (2), a DC charging terminal (6) connected to the battery high-voltage DC bus (5), the battery high-voltage DC bus (5) connected to an electronic control device system (3) through a DC switch (4), the electronic control device system (3) respectively connected to an AC auxiliary power supply terminal (8), a DC auxiliary power supply terminal (9), a left electric wheel power supply terminal (101) and a right electric wheel power supply terminal (102), and the electronic control device system (3) respectively connected to a battery cluster (1), a high-voltage box (2), a DC switch (4), a DC charging terminal (6), an AC auxiliary power supply terminal (8), a DC auxiliary power supply terminal (9), a vehicle condition information collection terminal (50), a control device (60) and a battery management system BMS (1n1) through a system control bus (7), thereby forming a control link of the pure electric power system of the heavy-duty mining truck.

[0034] like Figure 2 As shown, the pure electric power system of a mining heavy truck is characterized in that the power control method and process of the pure electric power system are as follows:

[0035] S100: The system performs a self-test on power-on to check the battery power and temperature, controlled components, communication lines, and vehicle condition information; if abnormal, an alarm is given; if normal, the system selects to execute S110 driving mode or S120 charging mode;

[0036] S110: driving mode;

[0037] S111: monitor the battery power SOC value. If it is abnormal, execute S130; if it is normal, execute S112;

[0038] S112: The monitored battery power SOC value is within a set range of the battery power;

[0039] S113: distributing power according to the received control command;

[0040] S114: real-time monitoring of operating parameters, at least monitoring of battery state of charge, battery temperature, battery health, environmental parameters and operating parameters of controlled components, and comparing within a set parameter value range; if abnormal, execute S130; if normal, execute S115;

[0041] S115: Detect and determine whether to continue running. If yes, execute S111; otherwise, execute S116;

[0042] S116: Control and complete the stop operation.

[0043] S120: Charging mode;

[0044] S121: Detect whether the charging connection is normal, at least detect whether the power connection and the communication connection and the communication signal are normal; if abnormal, execute S130; if normal, execute S122;

[0045] S122: Real-time monitoring of battery power SOC value and corresponding parameters;

[0046] S123: confirming that the monitored battery power SOC value is within a set range of the battery power;

[0047] S124: accept charging power and continue charging;

[0048] S125: Real-time detection of whether the current charging task is completed, if yes, execute S126; otherwise, execute S122;

[0049] S126: Notify completion of this charging task;

[0050] S130: Alarm prompt.

[0051] like Figure 3 As shown, the pure electric power system of a mining heavy truck is characterized in that the electronic control device system (3) is connected to the DC / DC module (34), the DC / AC converter module (35), the left inverter module (36), and the right inverter module (37) through a DC bus connection terminal (33) through a DC power line; it is also characterized in that the DC / DC module (34) is connected to the DC auxiliary power supply terminal (44), the DC / AC converter module (35) is connected to the AC auxiliary power supply terminal (45), and the left inverter module (36) is connected to the AC auxiliary power supply terminal (46). The left AC power line (42) is connected to the left electric wheel power supply terminal (38), and the right inverter module (37) is connected to the right electric wheel power supply terminal (39) via the right AC power line (43); the controller (31) is also characterized in that the controller (31) is respectively connected to the DC bus connection terminal (33), the DC / DC module (34), the DC / AC converter module (35), the left inverter module (36), the right inverter module (37) and the disconnect 3 communication interface (40) and the vehicle condition information collection communication terminal (46) via the control communication line (32).

[0052] The pure electric power system of a mining heavy truck is characterized in that the battery cluster (1) is composed of a first battery cluster (11), a second battery cluster (12), and an nth battery cluster (1n), and each battery cluster is composed of a plurality of battery cells connected in series.

[0053] The pure electric power system of a mining heavy truck is characterized in that the high-voltage box (2) is composed of a first high-voltage box (21), a second high-voltage box (22), and an nth high-voltage box (2n), and each high-voltage box corresponds to a battery cluster.

[0054] The pure electric power system of the mining heavy truck is characterized in that the battery management system BMS (1n1) is connected to each battery cell of the corresponding battery cluster to monitor the voltage and temperature parameters of the battery and the current parameters of the battery cluster.

[0055] The present invention discloses a pure electric power system for a heavy-duty truck for mining, which has an innovative layout and optimized design for the power system. A DC battery energy storage unit system that meets the requirements of a high-power, large-capacity, and high-voltage platform is constructed by connecting battery clusters of multiple large battery strings in parallel. The multiple converter units of an electronic control device system output AC power of different demands and DC power for auxiliary power of a heavy-duty truck for mining; a high-voltage DC platform is formed by connecting multiple battery string clusters in parallel to a high-voltage DC bus through a battery cluster adjustment module and a DC high-voltage cabin; the high-voltage DC bus is connected through the DC end of the electronic control device unit system, and the DC end of the inverter unit of the electronic control device unit system is connected to the high-voltage DC power line, and the output end is connected to the AC load of an electric wheel; at the same time, the DC input end of the DC conversion unit of the electronic control device is connected to the high-voltage DC power line, and the output end is connected to the DC load for auxiliary power; the corresponding controlled power conversion unit and the controlled switch are connected through the electronic control device control bus to realize a control system for pure electric power supply of a heavy-duty truck for mining.

[0056] Specific implementation methods are given above, but the present invention is not limited to the described implementation methods. For those skilled in the art, it does not require creative work to design various modified layouts, combinations, formulas, and parameters according to the technical solution of the present invention, and changes, modifications, substitutions, and variations of the implementation methods without departing from the principles and conceptual framework of the present invention still fall within the protection scope of the present invention.

Claims

1. A pure electric power system for a mining heavy truck, wherein a battery cluster is connected to a battery high-voltage DC bus through a corresponding high-voltage box, and a DC charging terminal is connected to the battery high-voltage DC bus at the same time, and the battery high-voltage DC bus is connected to an electronic control device system through a DC switch, and the electronic control device system is respectively connected to an AC auxiliary power supply terminal, a DC auxiliary power supply terminal, a left electric wheel power supply terminal and a right electric wheel power supply terminal, and the communication interface of the electronic control device system is respectively connected to a battery cluster, a high-voltage box, a DC switch and protection device, a DC charging terminal, an AC auxiliary power supply terminal, a DC auxiliary power supply terminal, a vehicle condition information collection terminal, a control device, and a battery management system BMS through a system control bus, thereby forming a control link of a pure electric power system for a mining heavy truck.

2. The pure electric power system of a mining heavy truck according to claim 1, characterized in that: The power control method and process of its pure electric power system are as follows: S100: The system performs a self-test on power-on to check the battery power and temperature, controlled components, communication lines, and vehicle condition information; if abnormal, an alarm is given; if normal, the system selects to execute S110 driving mode or S120 charging mode; S110: driving mode; S111: monitor the battery power SOC value. If it is abnormal, execute S130; if it is normal, execute S112; S112: The monitored battery power SOC value is within a set range of the battery power; S113: distributing power according to the received control command; S114: real-time monitoring of operating parameters, at least monitoring of battery state of charge, battery temperature, battery health, environmental parameters and operating parameters of controlled components, and comparing within a set parameter value range; if abnormal, execute S130; if normal, execute S115; S115: Detect and determine whether to continue running. If yes, execute S111; otherwise, execute S116; S116: Control and complete the stop operation. S120: Charging mode; S121: Detect whether the charging connection is normal, at least detect whether the power connection and the communication connection and the communication signal are normal; if abnormal, execute S130; if normal, execute S122; S122: Real-time monitoring of battery power SOC value and corresponding parameters; S123: confirming that the monitored battery power SOC value is within a set range of the battery power; S124: accept charging power and continue charging; S125: Real-time detection of whether the current charging task is completed, if yes, execute S126; otherwise, execute S122; S126: Notify completion of this charging task; S130: Alarm prompt.

3. The pure electric power system of a mining heavy truck according to claim 1 is characterized in that Electronic Control The device system is characterized in that the DC / DC module, the DC / AC converter module, the left inverter module, and the right inverter module are connected to the DC bus connection terminal through the DC power line; the DC / DC module is connected to the DC auxiliary power supply terminal, the DC / AC converter module is connected to the AC auxiliary power supply terminal, the left inverter module is connected to the left electric wheel power supply terminal through the left AC power line, and the right inverter module is connected to the right electric wheel power supply terminal through the right AC power line; the controller is characterized in that the DC bus connection terminal, the DC / DC module, the DC / AC converter module, the left inverter module, the right inverter module, the communication interface and the vehicle condition information collection communication terminal are connected to the controller through the control communication line.

4. The pure electric power system of a mining heavy truck according to claim 1 is characterized in that The battery cluster is composed of a plurality of battery clusters including a first battery cluster, a second battery cluster, and an nth battery cluster, and each battery cluster includes a plurality of battery cells connected in series.

5. The pure electric power system of a mining heavy truck according to claim 1 is characterized in that The high-voltage box is composed of a first high-voltage box, a second high-voltage box, and an nth high-voltage box, and each high-voltage box corresponds to a battery cluster.

6. The pure electric power system of a mining heavy truck according to claim 1 is characterized in that: The battery management system BMS is connected to each battery cell of the corresponding battery cluster and monitors the voltage and temperature parameters of the battery as well as the current parameters of the battery cluster.

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