Energy management system and management method of pure electric paver

Abstract

The invention relates to an energy management system and management method of a pure electric paver. The energy management system comprises a power battery, a storage battery, a TMS, a BMS, a VCU, a GPS vehicle-mounted terminal, an RIMS platform and a PDU. The TMS and the BMS are respectively in control connection with the power battery; the BMS is in control connection with the PDU; the DC / DC is in control connection with the storage battery; the TMS, the BMS, the VCU and the GPS vehicle-mounted terminal are sequentially connected through a data bus; the GPS vehicle-mounted terminal and the RIMS platform carry out data transmission through a wireless network; the RIMS platform sends equipment information to a user and service personnel through a wireless network; according to the energy management method, the storage battery is automatically and intelligently charged when the paver is dormant for a long time. The method is simple and convenient to operate, high in reliability, low in use cost and capable of effectively avoiding the low-voltage storage battery lack of electricity, diagnosing the states of the low-voltage storage battery and the power battery and feeding back the states to workers in time.

Description

Technical Field

[0001] The invention relates to an energy management system and a management method for a pure electric paver, belonging to the technical field of paver equipment. Background Art

[0002] Pavers are mainly used for paving stabilized soil and asphalt concrete on roads. The construction materials are delivered to the screed plate through the feeding mechanism, and then the screed plate is flattened and the vibrating mechanism is used for initial compaction to achieve paving of the construction materials. When paving asphalt materials, the screed plate can be heated through the screed plate bottom plate heating device to achieve high-temperature paving.

[0003] For a pure electric paver, the power battery is the only energy source. The power battery drives the transfer case through the motor control to provide power to the entire paver; the power battery provides control power to the paver through DC / DC and charges the low-voltage battery; the power battery also provides power for the ironing plate heating rod. Since it is normal for paver equipment to be parked for a long time, the low-voltage battery is prone to power loss and damage during long-term storage. The stability and safety of the power battery also need to be managed and monitored. Therefore, the management and monitoring of the power battery and low-voltage battery of the paver is particularly important.

[0004] The existing battery energy management system of pure electric drive pavers is relatively complex and has low reliability. The low-voltage battery is prone to power loss. When the low-voltage battery and power battery fail, they cannot be handled in time, resulting in a high failure rate and high cost of use. Therefore, there is an urgent need for a battery energy management, monitoring and warning system and management method suitable for pure electric drive pavers, which can distribute the energy of the power battery when the paver is operating normally, automatically replenish the low-voltage battery during long-term dormancy to prevent it from being damaged due to power loss, monitor the safety status of the power battery, and promptly notify the staff to handle the system failure when it occurs, so as to avoid further expansion of the failure, reduce maintenance costs, and reduce use costs. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an energy management system and management method for a pure electric paver which is easy to operate, highly reliable and has low use cost, which can effectively avoid low-voltage battery depletion, and can diagnose the status of low-voltage batteries and power batteries, and provide timely feedback to staff.

[0006] The object of the present invention is achieved in that: An energy management system for a pure electric paver, comprising a power battery and a storage battery, a thermal management system unit TMS, a battery management system unit BMS, a vehicle central control unit VCU, a GPS vehicle terminal, a RIMS platform, and an energy distribution unit PDU; The TMS and BMS are respectively connected to the power battery control; the BMS is connected to the PDU control; the PDU is respectively connected to the screed heating, DC / DC and motor controller of the paver; the DC / DC is connected to the battery control; The TMS, BMS, VCU and GPS vehicle terminal are connected in sequence via a data bus to achieve bidirectional data transmission; The GPS vehicle-mounted terminal and the RIMS platform perform data transmission via a wireless network; the RIMS platform sends device information to users and service personnel via a wireless network.

[0007] Furthermore, the DC / DC and the battery are also respectively connected to the low-voltage control system of the paver to supply power to the low-voltage system of the entire vehicle.

[0008] Furthermore, the motor controller is connected to the motor control of the paver, and the motor drives the transfer case and then drives the pump of the paver to perform paving operations.

[0009] Furthermore, the BMS includes a battery management module, a control module, a display module and a collection module for collecting battery cell information of the power battery.

[0010] Furthermore, the PDU uses circuit breakers, contactors, distributors, and relays to supply power to the ironing plate heating, DC / DC, and motor controller from the power battery.

[0011] Furthermore, the wireless network is a mobile communication network; and the data bus is a CAN bus.

[0012] An energy management method for a pure electric paver is implemented based on any of the above energy management systems for the pure electric paver, and includes two working conditions: Working condition 1. Normal working condition: The power of the power battery is provided to the PDU by the BMS, and the PDU distributes and outputs it to the screed heating, DC / DC and motor controller according to the needs of the VCU to meet the needs of paving operations; Working condition 2: Long-term dormancy state: Step S101, VCU detects battery voltage: the VCU detects battery voltage and sends data to the GPS vehicle terminal, and then sends data to the RIMS platform through the GPS vehicle terminal; Step S102, the RIMS platform records the battery voltage: the RIMS platform summarizes and records the received battery voltage data and forms a battery health status table; Step S103, battery power failure: when the VCU detects that the battery is power-deficient, it triggers the intelligent power replenishment strategy to replenish the battery, wakes up the BMS and requests high voltage to charge the battery, thus ending the power failure state; Step S104, BMS detects that it does not have the upper high voltage: When BMS detects that it does not have the upper high voltage, the fault is sent to VCU, and VCU sends it to RIMS platform through GPS vehicle terminal to request manual processing; BMS and VCU resume dormant state, and no intelligent power replenishment is performed before manual reset; Step S105, RIMS platform notifies manual processing: RIMS platform sends warning information to users and service personnel according to the degree of harm to the equipment.

[0013] Furthermore, the intelligent power replenishment strategy includes the following steps: Step S201, entering the dormant state: When the key switch is powered off, the intelligent charging enable is set to "1"; the VCU, BMS, and GPS vehicle terminal enter a dormant state; the VCU monitors the battery voltage, and the BMS monitors the power battery status; Step S202: The battery is low on power. When the VCU detects that the battery voltage is less than the first voltage threshold V1 and the smart charging enable is "1", the BMS is woken up and steps S203 to S203 to S208 are executed; otherwise, step S209 is executed; Step S203, requesting high voltage: VCU sends a high voltage request to BMS; BMS detects the high voltage condition. If BMS tests the power battery and finds a fault, or the power battery is insufficient, the high voltage fails and sends a fault code to VCU, and then executes step S209; otherwise, BMS feedbacks that the high voltage can be increased and continues to execute; Step S204, BMS high voltage: BMS controls the power battery to output power to the PDU; Step S205, PDU distributes power: PDU outputs power from the power battery to the DC / DC; Step S206, DC / DC voltage conversion: If the DC / DC module test finds no fault, the DC / DC will reduce the high voltage power allocated by the PDU and transmit it to the battery, and then go to step S207; otherwise, the DC / DC will send a fault code to the VCU, and then go to step S209; Step S207, battery charging: If the charging voltage does not reach the second voltage threshold V2 within a certain time T1, the BMS will lower the high voltage, the charging fails, and the smart charging enable is set to "0", and then execute step S209; if the charging voltage reaches the second voltage threshold V2 within T1, continue to execute the following; Step S208, the power replenishment is successful: the BMS reduces the high voltage, sets the smart charging enable to "1", and each device unit returns to sleep mode; Step S209, fault handling: The VCU sends the received fault code to the GPS vehicle terminal, which forwards it to the RIMS platform. The RIMS platform sends the warning information to users and service personnel according to the degree of harm to the equipment. Manual intervention is required for maintenance. After the maintenance is completed, the smart charging enable is manually set to "1".

[0014] Compared with the prior art, the present invention has the following beneficial effects: The energy management system of the pure electric paver of the present invention distributes the electric energy of the power battery to the heating of the screed plate, DC / DC, and the power supply of the motor controller through TMS, BMS, VCU, and PDU during the paving operation to meet the energy demand of the paving operation. During long-term dormancy, the TMS, BMS, VCU, and GPS vehicle-mounted terminal connected in sequence through the CAN bus, the BMS and VCU respectively monitor the status of the power battery and the power-deficient status of the battery. Once the battery is found to be power-deficient, the BMS is awakened to recharge the battery; if a fault occurs, the fault information is sent to the RIMS platform through the GPS vehicle-mounted terminal, and the RIMS platform notifies users and service personnel to prevent the fault from further expanding, thereby reducing equipment maintenance costs and equipment use costs; The energy management method for the pure electric paver of the present invention can automatically recharge the battery when the paver is dormant, and record the battery power health curve for the convenience of users to view. At the same time, if the power battery failure or power loss is found during the automatic recharging process, and the battery failure causes the inability to automatically recharge, the warning information will be automatically sent to the user and service personnel through the RIMS platform, requesting personnel to intervene and handle it. The vehicle enters an active dormant state to prevent the problem from further expanding, reduce maintenance costs, and reduce use costs. It is easy to operate, highly reliable, and economical to use. It can effectively avoid battery power loss, and can diagnose the status of batteries and power batteries, reduce equipment failure rates, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of an energy management system for a pure electric paver of the present invention.

[0016] Figure 2 This is a workflow diagram of an energy management method for a pure electric paver according to the present invention.

[0017] in: TMS1, BMS2, power battery 3, vehicle central control unit VCU4, GPS on-board terminal 5, RIMS platform 6, user 7, service personnel 8, energy distribution unit PDU 9, ironing board heating 10, DC / DC 11, low-voltage control system 12, battery 13, motor controller 14, motor 15, transfer case 16, pump 17. DETAILED DESCRIPTION Example

[0018] See also Figure 1 The present invention relates to an energy management system for a pure electric paver, comprising a thermal management system unit TMS1, a battery management system unit BMS2, a power battery 3, a vehicle central control unit VCU4, a GPS vehicle terminal 5, a RIMS platform 6, an energy distribution unit PDU9, a screed heating 10, a DC / DC 11, a low-voltage control system 12 and a battery 13; the TMS1, BMS2, VCU4 and the GPS vehicle terminal 5 are connected in sequence through a CAN bus to realize bidirectional data transmission; The TMS1 and BMS2 are respectively connected to the power battery 3. TMS is a thermal management system for the power battery, which adjusts the temperature of the power battery so that it works at a suitable temperature and improves the efficiency and safety of the power battery. BMS is a battery management system, which is used to intelligently manage and maintain each battery cell of the power battery 3, prevent overcharging and overdischarging of the battery, extend the battery life, and monitor the battery status. It includes a battery management module, a control module, a display module, and a collection module for collecting battery cell information of the power battery; TMS1 and BMS2 are connected via a CAN bus bidirectional data connection. TMS1 adjusts the temperature of the power battery 3 according to the temperature of the power battery 3 fed back by BMS2, so that the power battery 3 works at a suitable temperature and works in an optimal state. BMS2 and VCU4 are connected via a CAN bus bidirectional data connection, and can wake each other up during sleep. For example, during sleep, if VCU4 detects that the battery 13 is low on power, VCU4 wakes up BMS2 via the CAN bus and requests high voltage power to recharge the battery 13. During sleep, if fast charging is selected to charge the power battery 3 and the charging plug is plugged in to activate BMS2, BMS2 wakes up VCU4 via a hard line and enters fast charging mode. The BMS2 is controlled and connected with the PDU9, and the PDU9 is controlled and connected with the screed heating 10, DC / DC 11 and motor controller 14 of the paver respectively; the PDU is an electric energy distribution unit, which supplies power to the screed heating 10, DC / DC 11 and motor controller 14 through components such as circuit breakers, contactors, distributors and relays. The DC / DC 11 is connected to the battery 13; the electric energy output from the power battery 3 by the BMS2 is distributed through the PDU 9, and the DC / DC 11 converts the voltage to charge the battery 13; the DC / DC 11 and the battery 13 are also connected to the low-voltage control system 12 of the paver for power supply, so as to supply power to the low-voltage system of the whole vehicle, such as VCU 4; The motor controller 14 is connected to the motor 15 of the paver, and the motor 15 drives the transfer case 16 and then drives the pump 17 of the paver to perform paving operations; The VCU4 and the GPS vehicle terminal 5 perform data transmission via the CAN bus. In the dormant state, the transmission frequency is reduced and only key parameters are sent; The RIMS platform integrates business modules such as after-sales service, equipment monitoring, testing equipment, information query, etc., builds a bridge for communication between construction machinery OEMs and end users, and creates intelligent and branded products. It includes a RIMS server and a RIMS terminal user mobile client, and communicates through a mobile communication network; The GPS vehicle terminal 5 and the RIMS platform 6 perform data transmission via a mobile communication network, such as a 5G network. In a dormant state, the transmission frequency is reduced and only key parameters are sent; the RIMS platform 6 sends device information to communication devices carried by users 7 and service personnel 8, such as mobile phones, via a mobile communication network to notify users 7 and service personnel 8; The energy management system of the pure electric paver of this embodiment distributes the electric energy of the power battery 3 to the screed heating 10, DC / DC 11, and the motor controller 14 through TMS1, BMS2, VCU4, and PDU9 during the paving operation to meet the energy requirements of the paving operation. During long-term dormancy, TMS1, BMS2, VCU4, and GPS vehicle terminal 5 connected in sequence through the CAN bus monitor the status of the power battery 3 and the power-deficient status of the battery 13 respectively by BMS2 and VCU4. Once the battery 13 is found to be power-deficient, BMS2 is awakened to recharge the battery 13; if a fault occurs, the fault information is sent to the RIMS platform 6 through the GPS vehicle terminal 5, and the RIMS platform 6 notifies the user 7 and the service personnel 8 to prevent the fault from further expanding, reduce the equipment maintenance cost, and reduce the equipment use cost. Example

[0019] The energy management method of a pure electric paver according to the present invention is implemented based on the energy management system of a pure electric paver in the above-mentioned embodiment 1, and includes two working conditions: Working condition 1. Normal working condition: The power of the power battery 3 is provided by the BMS 2 to the PDU 9, and the PDU 9 distributes and outputs the power to the screed heating 10, the DC / DC 11 and the motor controller 14 according to the requirements of the VCU 4 to meet the requirements of the paving operation; Working condition 2: Long-term dormancy state: Step S101, VCU detects battery voltage: the VCU 4 detects the voltage of the battery 13, and sends the data to the GPS vehicle terminal 5, and then sends it to the RIMS platform 6 through the GPS vehicle terminal 5; Step S102, RIMS platform records battery voltage: the RIMS platform 6 summarizes and records the received battery 13 voltage data and forms a battery 13 health status table; Step S103, battery power failure: when VCU4 detects that the battery 13 is power-deficient, it triggers the intelligent power replenishment strategy to replenish the battery 13, wakes up BMS2 and requests high voltage to charge the battery 13, thus ending the power failure state; Step S104, BMS detects that it does not have the upper high voltage: When BMS2 detects that it does not have the upper high voltage, it sends the fault to VCU4, and VCU4 sends it to RIMS platform 6 through GPS vehicle terminal 5, requesting manual processing; BMS2 and VCU4 resume the dormant state, and no longer perform intelligent power replenishment before manual reset; Step S105, RIMS platform notifies manual processing: RIMS platform 6 sends warning information to users and service personnel according to the degree of harm to the equipment.

[0020] Specifically, the workflow diagram of the intelligent power replenishment strategy is shown in the attached Figure 2 , including the following steps: Step S201, entering the dormant state: When the key switch is powered off, the intelligent charging enable is set to "1"; VCU4, BMS2, and GPS vehicle terminal 5 enter a dormant state; VCU4 monitors the voltage of the storage battery 13, and BMS2 monitors the status of the power battery 3; Step S202: The battery is low on power. When VCU4 detects that the voltage of the battery 13 is less than the first voltage threshold V1 and the smart charging enable is "1", BMS2 is awakened and steps S203 to S203 to S208 are executed; otherwise, step S209 is executed; Step S203, requesting high voltage: VCU4 sends a high voltage request to BMS2; BMS2 detects the high voltage condition. If BMS2 tests the power battery 3 and finds a fault, or the power battery 3 is insufficient, the high voltage fails, and a fault code is sent to VCU4, and then step S209 is executed; otherwise, BMS2 feedbacks that the high voltage can be applied and continues to execute; Step S204, BMS high voltage: BMS2 controls the power battery 3 to output electric energy to PDU9; Step S205, PDU distributes power: PDU9 outputs power from power battery 3 to DC / DC 11; Step S206, DC / DC voltage conversion: If the DC / DC11 module is tested and no fault is found, the DC / DC11 steps down the high voltage electricity allocated by the PDU9 and transmits it to the battery 13, and then goes to step S207; otherwise, the DC / DC11 sends the fault code to the VCU4, and then executes step S209; Step S207, battery charging: If the charging voltage does not reach the second voltage threshold V2 within a certain time T1, the BMS2 will reduce the high voltage, the charging fails, and the smart charging enable is set to "0", and then execute step S209; if the charging voltage reaches the second voltage threshold V2 within T1, continue to execute the following; Step S208, the power replenishment is successful: BMS2 reduces the high voltage, and sets the smart charging enable to "1", and each device unit returns to sleep mode; Step S209, fault handling: VCU4 sends the received fault code to GPS vehicle terminal 5, which forwards it to RIMS platform 6. RIMS platform 6 sends the warning information to users and service personnel according to the degree of harm to the equipment. Manual intervention is required for maintenance. After the maintenance is completed, the intelligent charging enable is manually set to "1".

[0021] The energy management method for the pure electric paver of the present embodiment can automatically recharge the battery 13 when the paver is dormant, and record the battery power health curve for the convenience of users to view. At the same time, if the power battery 3 is found to be faulty or low in power during the automatic recharging process, or the battery 13 is faulty and cannot be automatically recharged, a warning message will be automatically sent to the user and service personnel through the RIMS platform 6, requesting personnel to intervene and handle it. The vehicle enters an active dormant state to prevent the problem from further expanding, reduce maintenance costs, and reduce usage costs.

[0022] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. An energy management system for a pure electric paver, comprising a power battery (3) and a storage battery (13), characterized in that: It also includes a thermal management system unit TMS (1), a battery management system unit BMS (2), a vehicle central control unit VCU (4), a GPS vehicle terminal (5), a RIMS platform (6), and a power distribution unit PDU (9); The TMS (1) and the BMS (2) are respectively connected to the power battery (3); the BMS (2) is connected to the PDU (9); the PDU (9) is respectively connected to the screed heating (10), the DC / DC (11) and the motor controller (14) of the paver; the DC / DC (11) is connected to the storage battery (13); The TMS (1), BMS (2), VCU (4) and GPS vehicle-mounted terminal (5) are connected in sequence via a data bus to achieve bidirectional data transmission; The GPS vehicle-mounted terminal (5) and the RIMS platform (6) perform data transmission via a wireless network; the RIMS platform (6) sends device information to a user (7) and a service personnel (8) via the wireless network.

2. The energy management system of a pure electric paver according to claim 1, characterized in that: The DC / DC (11) and the storage battery (13) are also respectively connected to the low-voltage control system (12) of the paving machine for power supply, so as to supply power to the low-voltage system of the entire vehicle.

3. The energy management system of a pure electric paver according to claim 1, characterized in that: The motor controller (14) is controllably connected to the motor (15) of the paver, and the motor (15) drives the transfer case (16) and further drives the pump (17) of the paver to perform paving operations.

4. The energy management system of a pure electric paver according to claim 1, characterized in that: The BMS (2) comprises a battery management module, a control module, a display module and a collection module for collecting battery cell information of a power battery.

5. The energy management system of a pure electric paver according to claim 1, characterized in that: The PDU (9) uses a circuit breaker, a contactor, a distributor, and a relay to respectively supply power from the power battery (3) to the screed heating (10), the DC / DC (11), and the motor controller (14).

6. The energy management system of a pure electric paver according to claim 1, characterized in that: The wireless network is a mobile communication network; the data bus is a CAN bus.

7. An energy management method for a pure electric paver, characterized in that: It is realized based on the energy management system of any one of claims 1 to 6 of the pure electric paver, and includes two working conditions: Working condition 1. Normal working condition: The electric energy of the power battery (3) is provided to the PDU (9) by the BMS (2), and the PDU (9) distributes and outputs the electric energy to the screed heating (10), the DC / DC (11) and the motor controller (14) according to the requirements of the VCU (4), so as to meet the requirements of the paving operation; Working condition 2: Long-term dormancy state: Step S101, VCU detects battery voltage: the VCU (4) detects the battery (13) voltage and sends the data to the GPS vehicle terminal (5), and then sends the data to the RIMS platform (6) through the GPS vehicle terminal (5); Step S102, the RIMS platform records the battery voltage: the RIMS platform (6) summarizes and records the received battery (13) voltage data and forms a battery (13) health status table; Step S103, battery power failure: when the VCU (4) detects that the battery (13) is power-deficient, the intelligent power replenishment strategy is triggered to replenish the battery (13), the BMS (2) is awakened and a high voltage is requested to charge the battery (13), thereby ending the power failure state; Step S104, BMS detects that it does not have the upper high voltage: When the BMS (2) detects that it does not have the upper high voltage, it sends the fault to the VCU (4), and the VCU (4) sends it to the RIMS platform (6) through the GPS vehicle terminal (5) to request manual processing; the BMS (2) and the VCU (4) resume the dormant state and no longer perform intelligent power replenishment before manual reset; Step S105, RIMS platform notifies manual processing: RIMS platform (6) sends warning information to users and service personnel according to the degree of harm to the equipment.

8. The energy management method for a pure electric paver according to claim 7, characterized in that: The intelligent power replenishment strategy includes the following steps: Step S201, entering the dormant state: When the key switch is powered off, the intelligent charging enable is set to "1"; the VCU (4), the BMS (2) and the GPS vehicle terminal (5) enter a dormant state; the VCU (4) monitors the voltage of the storage battery (13), and the BMS (2) monitors the state of the power battery (3); Step S202: The battery is low on power. When the VCU (4) detects that the voltage of the battery (13) is less than the first voltage threshold V1 and the smart charging enable is "1", the BMS (2) is awakened and steps S203 to S208 are executed; otherwise, step S209 is executed; Step S203, requesting high voltage: the VCU (4) sends a high voltage request to the BMS (2); the BMS (2) detects the high voltage condition. If the BMS (2) tests the power battery (3) and finds that there is a fault, or the power battery (3) is insufficient, the high voltage fails to be applied, and a fault code is sent to the VCU (4), and then step S209 is executed; otherwise, the BMS (2) feedbacks that the high voltage can be applied and continues to execute the following steps; Step S204, BMS high voltage: BMS (2) controls the power battery (3) to output electric energy to the PDU (9); Step S205, PDU distributes power: the PDU (9) outputs power from the power battery (3) to the DC / DC (11); Step S206, DC / DC voltage conversion: If the DC / DC (11) module test finds no fault, the DC / DC (11) reduces the high voltage power distributed by the PDU (9) and transmits it to the battery (13), and then proceeds to step S207; otherwise, the DC / DC (11) sends a fault code to the VCU (4), and then proceeds to step S209; Step S207, battery charging: If the charging voltage does not reach the second voltage threshold V2 within a certain time T1, the BMS (2) lowers the high voltage, the charging fails, and sets the smart charging enable to "0", and then executes step S209; if the charging voltage reaches the second voltage threshold V2 within T1, the execution continues; Step S208: Power replenishment is successful: BMS (2) reduces high voltage and sets the smart charging enable to "1", and each device unit returns to sleep mode; Step S209, fault handling: the VCU (4) sends the received fault code to the GPS vehicle terminal (5), which forwards it to the RIMS platform (6). The RIMS platform (6) sends the warning information to the user and service personnel according to the degree of harm to the equipment. The service personnel intervene manually for maintenance. After the maintenance is completed, the intelligent charging enable is manually set to "1".

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