CAN bus intelligent power distribution module based on special vehicle

Abstract

The invention relates to the technical field of intelligent power distribution, in particular to a CAN bus intelligent power distribution module based on a special vehicle. The CAN bus intelligent power distribution module comprises a main control board, a power board, eight load aviation plug interfaces, two power supply aviation plug interfaces, a CAN bus aviation plug interface, a debugging aviation plug interface and a mechanical shell. According to the invention, a high-power low-voltage direct-current power supply can be reasonably distributed to eight electric devices through the intelligent power distribution module according to the power utilization requirements of different electric devices, so that reasonable use of energy is realized, output control can be carried out through a CAN bus, and the effects of saving energy and reducing consumption are achieved; the voltage and current of each eight-path electric equipment can be monitored, and corresponding short circuit, overvoltage and overcurrent protection values can be set, so that faults such as short circuit, overvoltage and overcurrent can be prevented; the running state of the electric equipment is monitored, overcurrent and overvoltage protection is provided, the power utilization state and fault alarm information can be reported through a bus, and reliable work of the electric equipment is guaranteed.

Description

Technical Field

[0001] This invention relates to the technical field of intelligent power distribution, and specifically to a CAN bus intelligent power distribution module for special vehicles. Background Technology

[0002] In recent years, with the development of information technology in special vehicles, the requirements for electrification and intelligence of special vehicles have become increasingly higher, and the power supply needs of various controllers and actuators have become increasingly complex. At present, most of the intelligent power distribution devices in special vehicles use manual control of thermal protection switches to distribute power to electrical equipment. The power distribution branches can only be protected by the overload function of the thermal protection switches themselves, and cannot monitor the power supply output status and voltage and current parameters of each electrical device. It is impossible to keep track of the operating status of the electrical equipment in a timely manner. At the same time, the configuration device structure of special vehicles is relatively simple, the space utilization is not sufficient, the control efficiency is not outstanding, it is difficult to implement more complex logic control, and it is difficult to manage the power distribution branches, which cannot meet the needs of intelligent power distribution management. Summary of the Invention

[0003] (I) The technical problem to be solved by the present invention

[0004] To address the aforementioned problems in existing technologies, this invention proposes a CAN bus intelligent power distribution module for special vehicles. Applied to a similar type of special vehicle, it can not only monitor the power supply output status and voltage and current parameters of various electrical devices, but also promptly grasp the operating status of the electrical devices, realizing relatively complex power distribution logic control and meeting the intelligent management needs of replacing manual operation of multiple power distribution branches.

[0005] (II) Technical Solution of the Invention

[0006] This invention designs a CAN bus intelligent power distribution module based on special vehicles, including a main control board (1), a power board (2), a load connector interface 1 (3), a load connector interface 2 (4), a load connector interface 3 (5), a load connector interface 4 (6), a load connector interface 5 (7), a load connector interface 6 (8), a load connector interface 7 (9), a load connector interface 8 (10), a power connector interface 1 (11), a power connector interface 2 (12), a CAN bus connector interface (13), and a debugging connector interface (14); Load connector interface 1 (3), Load connector interface 2 (4), Load connector interface 8 (15), CAN bus connector interface 9, CAN bus connector interface 10, CAN bus connector interface 11, CAN bus connector interface 12, CAN bus connector interface 13, CAN bus connector interface 14; Load connector interface 1 (3), Load connector interface 2 (4), Load connector interface 10, CAN bus connector interface 11, CAN bus connector interface 12, CAN bus connector interface 13, CAN bus connector interface 14, CAN bus connector interface 15, CAN bus connector interface 16, CAN bus connector interface 17, CAN bus connector interface 18, CAN bus connector interface 19, CAN bus ... The three (5), four (6), five (7), six (8), seven (9), eight (10), one (11), two (12), one (13), one (14), one (15), one (15), one (16), one (17), one (18), one (19), one (10), one (10), one (11), one (12), one (13), one (14), one (15), one (10), one (11), one (12), one (13), one (14), one (15), are installed on the mechanical housing (15), and the main control board (1) and the power board (2) are installed inside the mechanical housing (15); the main control board includes an MCU control circuit, an 8-channel power drive circuit, a voltage acquisition circuit, a current acquisition circuit, a storage circuit, a CAN1 integrated circuit, a CAN2 integrated circuit, and a power supply;

[0007] The CAN1 integrated circuit and CAN2 integrated circuit are connected to the CAN bus connector (13) and are mainly used to receive power distribution control commands from the vehicle terminal and send the operating status information of the electrical equipment.

[0008] The main control board is connected to the 8 MOSFET switches of the power board through 8 power drive circuits; the power drive circuits of the main control board control the on and off of the MOSFET switches of the power board to realize the power distribution of the electrical equipment; the current acquisition circuit and voltage acquisition circuit of the main control board acquire the voltage and current parameter information of the electrical equipment.

[0009] The 8-channel MOSFET switch of the power board is connected to the load connector 1 (3), load connector 2 (4), load connector 3 (5), load connector 4 (6), load connector 5 (7), load connector 6 (8), load connector 7 (9), and load connector 8 (10).

[0010] Power connector interface 1 (11) and power connector interface 2 (12) are connected to the main control board and the power board respectively, mainly to provide stable DC power to the main control board and the power board;

[0011] The debugging interface (14) is connected to the main control board and is mainly used for system software upgrades and simulation debugging.

[0012] Furthermore, the MCU control circuit adopts the ARM series.

[0013] Furthermore, the power board includes 8 MOSFET switches, manganese-copper alloy resistors, and a power input.

[0014] Furthermore, the storage circuit uses an EEPROM memory, which is capable of 1 million erase and write cycles.

[0015] Furthermore, the voltage acquisition circuit can acquire voltages from 10 channels.

[0016] Furthermore, the current acquisition circuit can complete the acquisition of 8 current channels.

[0017] Furthermore, the main control board uses a DC-DC regulated power supply to convert the vehicle's power supply into the main control board's power supply.

[0018] The beneficial effects of this invention are:

[0019] The intelligent power distribution module can achieve 8-channel DC 24V power distribution output, with 2 CAN interfaces and 1 programming interface; it features on / off function, load current detection function, output voltage and current acquisition function, input voltage undervoltage protection function, output current overload protection function, output short circuit protection function, fault reset function, and status indication function; it can set overcurrent, overvoltage, and short circuit parameters via CAN bus, and can also set device address and query the fault reporting method; it can realize 8-channel low-voltage DC power distribution, and each channel can carry up to 120A; it has scalability and flexibility, if the user's power distribution channel requirement is greater than 8 channels, simply increase the number of intelligent power distribution modules to meet the user's needs. Attached Figure Description

[0020] Figure 1 , Figure 2 This is a schematic diagram of the components of the present invention;

[0021] Figure 3 This is a schematic diagram of the electrical principle of the system of the present invention; Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1 to 2The CAN bus intelligent power distribution module for special vehicles shown in this invention mainly consists of the following components: main control board (1), power board (2), load connector interface 1 (3), load connector interface 2 (4), load connector interface 3 (5), load connector interface 4 (6), load connector interface 5 (7), load connector interface 6 (8), load connector interface 7 (9), load connector interface 8 (10), power connector interface 1 (11), power connector interface 2 (12), CAN bus connector interface (13), debugging connector interface (14), and mechanical housing (15). Load connector 1 (3), load connector 2 (4), load connector 3 (5), load connector 4 (6), load connector 5 (7), load connector 6 (8), load connector 7 (9), load connector 8 (10), power connector 1 (11), power connector 2 (12), CAN bus connector (13), and debugging connector (14) are installed on the mechanical housing (15), and the main control board (1) and power board (2) are installed inside the mechanical housing (15).

[0024] The main control board (1) is the core of the intelligent power distribution device, used for data acquisition, processing, logic operation and control, etc. It can also internally store and record configuration data such as overvoltage, overcurrent and short circuit protection values ​​for each channel. It mainly consists of MCU control circuit, 8-channel power drive circuit, voltage acquisition circuit, current acquisition circuit, storage circuit, CAN1 integrated circuit, CAN2 integrated circuit and power supply. The MCU control circuit adopts ARM series and supports 2-channel CAN bus communication. The storage circuit adopts EEPROM memory, which can complete 1 million erase and write cycles and supports 10-channel voltage acquisition, 8-channel current acquisition and 8-channel drive NMOS interface resources.

[0025] The power board mainly consists of 8 MOSFET switches, manganese-copper alloy resistors, and power input.

[0026] The MCU control circuit is used to acquire data received and buffered by the CAN1 and CAN2 integrated circuits, convert it into level signals according to the bus protocol, and control the corresponding 8 power drive circuits; it converts the analog voltage signals from the voltage acquisition circuit and current acquisition circuit into discrete digital signals for measurement, acquisition and processing; and it controls the reading and writing of the storage circuit to save key information about the device status.

[0027] The main control board (1) is connected to the CAN bus connector (13) through the CAN1 integrated circuit and the CAN2 integrated circuit. It is mainly used to receive the power distribution control command of the vehicle terminal and send the working status information of the electrical equipment.

[0028] The main control board (1) is connected to the 8 MOS transistor switches of the power board through 8 power drive circuits. The 8 MOS transistor switches of the power board (2) are connected to the load connector interface 1 (3), load connector interface 2 (4), load connector interface 3 (5), load connector interface 4 (6), load connector interface 5 (7), load connector interface 6 (8), load connector interface 7 (9), and load connector interface 8 (10). The power drive circuit of the main control board (1) controls the on and off of the MOS transistor switches of the power board (2) to realize the power distribution of the electrical equipment. At the same time, the current acquisition circuit and voltage acquisition circuit of the main control board (1) are used to collect and obtain information such as voltage and current parameters of the electrical equipment.

[0029] Power connector interface 1 (11) and power connector interface 2 (12) are connected to the main control board and the power board respectively, mainly to provide stable DC power to the main control board and the power board.

[0030] The debugging interface (14) is connected to the main control board and is mainly used for system software upgrades and simulation debugging.

[0031] The main control board uses a DC-DC regulated power supply to convert the vehicle's power supply to the main control board's power supply. With the help of a filter circuit, the power supply ripple of the main control board can be kept within 4‰.

[0032] The specific implementation process of the CAN bus intelligent power distribution module based on special vehicles is as follows:

[0033] (1) As Figure 1-3 As shown, the vehicle power supply enters from power connector one (11) and power connector two (12), respectively, to provide control power to the main control board and the power board.

[0034] (2) Figure 1-3 As shown, the vehicle terminal sends power distribution control commands through the CAN connector interface. After the main control board receives the power distribution control commands through the CAN1 and CAN2 integrated circuits, the MCU control circuit obtains the data received and buffered by the CAN1 and CAN2 integrated circuits, converts it into a level signal according to the bus protocol, and controls the corresponding 8 power drive circuits to take effect through the IO level signal, thereby controlling the on / off state of the 8 MOSFET switches on the power board, and outputting power distribution from the 8 load connector interfaces to realize the power supply and shutdown of the 8 electrical devices.

[0035] (3) Figure 1-3 As shown, the current acquisition circuit of the main control board amplifies the load operating current of the 8-channel MOSFET switch output terminal of the power board. The MCU control circuit converts the amplified analog value of the current into an A / D converter and sends the converted current data to the vehicle terminal device connected to the CAN connector via the CAN1 and CAN2 integrated circuits for display of the current value.

[0036] (4) Figure 1-3 As shown, the voltage acquisition circuit of the main control board performs voltage division processing on the load operating voltage at the output terminal of the MOS transistor switch (1-8) of the power board. The MCU control circuit performs A / D encoding conversion on the analog value of the voltage division processing, and sends the converted voltage data to the vehicle terminal device connected to the CAN connector through the CAN1 integrated circuit and CAN2 integrated circuit for display of the voltage value.

[0037] (5) Figure 1-3 As shown, the operating status of the electrical equipment, output current values, voltage values, and overcurrent / overvoltage fault alarm information are monitored from eight load connectors. The voltage and current acquisition circuits of the main control board collect these current values, voltage values, and overcurrent / overvoltage fault alarm information and send them to the MCU control circuit. The MCU control circuit then transmits the data to the vehicle terminal connected to the CAN connector via the CAN1 and CAN2 integrated circuits. Users can view the current operating status and power parameters of the electrical equipment in real time through the vehicle terminal. This system effectively improves the reliability of the low-voltage power distribution system.

[0038] (6) Figure 1-3 As shown, after the main control board receives the instruction to set protection value parameters through the CAN1 and CAN2 integrated circuits, the MCU control circuit extracts the data received and buffered by the CAN1 and CAN2 integrated circuits and saves the configuration data such as the set overvoltage, overcurrent, and short circuit protection values ​​to the storage circuit.

[0039] This invention has a simple structure and is easy to control. It can rationally distribute high-power low-voltage DC power to eight electrical devices through an intelligent power distribution module according to the power needs of different electrical devices, so as to realize the rational use of energy. At the same time, it can also perform output control through CAN bus, which can play a role in energy saving and consumption reduction.

[0040] The intelligent power distribution module can monitor the voltage and current of each of the eight electrical devices and can set corresponding short-circuit, overvoltage, and overcurrent protection values ​​to prevent faults such as short circuits, overvoltage, and overcurrent. It protects the intelligent power distribution device and the electrical equipment, improving the reliability of the power distribution system.

[0041] The intelligent power distribution module receives control commands from the host computer's CAN bus to control the power supply of in-vehicle electrical equipment. It can also monitor the operating status of the equipment and provide overcurrent and overvoltage protection. Furthermore, it can report power status and fault alarm information via the bus to ensure the reliable operation of the equipment.

[0042] This invention is scalable and flexible. If the user's power distribution channel requirement is greater than 8 channels, the user's needs can be met simply by increasing the number of intelligent power distribution devices.

[0043] This invention has been successfully installed on a special vehicle in China, and the system has been integrated and informatized along with the vehicle as it passed the initial acceptance test.

Claims

1. A CAN bus intelligent power distribution module for special vehicles, characterized in that, Main control board (1), power board (2), load connector 1 (3), load connector 2 (4), load connector 3 (5), load connector 4 (6), load connector 5 (7), load connector 6 (8), load connector 7 (9), load connector 8 (10), power connector 1 (11), power connector 2 (12), CAN bus connector (13), debugging connector (14), mechanical housing (15), load connector 1 (3), load connector 2 (4), load connector 3 (5), load connector Interfaces 4 (6), 5 (7), 6 (8), 7 (9), 8 (10), 1 (11), 2 (12), 3 (13), and 4 (14) are mounted on the mechanical housing (15). The main control board (1) and power board (2) are mounted inside the mechanical housing (15). The main control board includes an MCU control circuit, an 8-channel power drive circuit, a voltage acquisition circuit, a current acquisition circuit, a storage circuit, a CAN1 integrated circuit, a CAN2 integrated circuit, and a power supply. The CAN1 integrated circuit and CAN2 integrated circuit are connected to the CAN bus connector (13) and are mainly used to receive power distribution control commands from the vehicle terminal and send the operating status information of the electrical equipment. The main control board is connected to the 8 MOSFET switches of the power board through 8 power drive circuits; the power drive circuits of the main control board control the on and off of the MOSFET switches of the power board to realize the power distribution of the electrical equipment. The main control board's current acquisition circuit and voltage acquisition circuit acquire voltage and current parameter information of the electrical equipment. The 8-channel MOSFET switch of the power board is connected to the load connector 1 (3), load connector 2 (4), load connector 3 (5), load connector 4 (6), load connector 5 (7), load connector 6 (8), load connector 7 (9), and load connector 8 (10). Power connector interface 1 (11) and power connector interface 2 (12) are connected to the main control board and the power board respectively, mainly to provide stable DC power to the main control board and the power board; The debugging interface (14) is connected to the main control board and is mainly used for system software upgrades and simulation debugging.

2. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The MCU control circuit uses the ARM series.

3. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The power board includes 8 MOSFET switches, manganese-copper alloy resistors, and a power input.

4. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The storage circuit uses EEPROM memory, which can complete 1 million erase and write cycles.

5. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The voltage acquisition circuit can acquire voltage data from 10 channels.

6. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The current acquisition circuit can acquire current from 8 channels.

7. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The main control board uses a DC-DC regulated power supply to convert the vehicle's power supply to the main control board's power supply.

8. The CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The vehicle terminal sends power distribution control commands through the CAN connector interface. After the main control board receives the power distribution control commands through the CAN1 and CAN2 integrated circuits, the MCU control circuit obtains the data received and buffered by the CAN1 and CAN2 integrated circuits, converts it into a level signal according to the bus protocol, and controls the corresponding 8 power drive circuits to take effect through the IO level signal, thereby controlling the on / off state of the 8 MOSFET switches on the power board, and outputting power distribution from the 8 load connector interfaces to realize the power supply and shutdown of the 8 electrical devices.

9. A CAN bus intelligent power distribution module for special vehicles as described in claim 1, characterized in that, The operating status of the electrical equipment, output current value, voltage value, and overcurrent and overvoltage fault alarm information are monitored from the eight load connectors. The voltage acquisition circuit and current acquisition circuit of the main control board collect the above current value, voltage value, and overcurrent and overvoltage fault alarm information and send them to the MCU control circuit. The MCU control circuit sends the information to the vehicle terminal connected to the CAN connector through the CAN1 integrated circuit and CAN2 integrated circuit. Users can view the current operating status and power parameters of the electrical equipment in real time through the vehicle terminal.

10. A CAN bus intelligent power distribution module for special vehicles as described in claim 5 or 6, characterized in that, The main control board's current acquisition circuit amplifies the load operating current at the output terminals of the 8 MOSFET switches on the power board. The MCU control circuit performs A / D encoding conversion on the amplified analog value and sends the converted current data to the vehicle terminal device connected to the CAN connector via the CAN1 and CAN2 integrated circuits for display. The main control board's voltage acquisition circuit divides the load operating voltage at the output terminals of the MOSFET switches (1-8) on the power board. The MCU control circuit performs A / D encoding conversion on the divided analog value and sends the converted voltage data to the vehicle terminal device connected to the CAN connector via the CAN1 and CAN2 integrated circuits for display.

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