All-in-one power supply system and method for hydrogen fuel cell vehicle on-board battery

Abstract

The application discloses a kind of hydrogen fuel cell vehicle on-board battery multi-in-one power supply system, including vehicle controller, data monitoring center, wireless transceiver and detection system and power supply system.The wireless transceiver and detection system include vehicle remote terminal TBOX and battery management system BMS;The TBOX is connected between the cloud platform by mobile wireless;The BMS has the function of timing wake-up and the function of collecting vehicle storage battery voltage;The power supply system includes fuel cell system, fuel cell DC / DC boost component, multi-in-one control system, vehicle lithium battery system, vehicle low-voltage storage battery system, DC / DC step-down component.Based on the power supply method of the power supply system, three power supply modes can be realized, for power supply to lithium battery system or low-voltage storage battery system alone, or simultaneous power supply of them.The multi-in-one power supply system and method of the application optimize the power supply circuit, reduce energy consumption and improve power supply efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen fuel cell vehicles, and relates to a multi-in-one power supplementing system and method for a hydrogen fuel cell vehicle on-board storage battery. BACKGROUND

[0002] Hydrogen fuel cell vehicles have gradually become one of the important measures for countries to solve these problems. Due to the immaturity of hydrogen fuel cell vehicles and the lack of hydrogen refueling stations, most hydrogen fuel cell vehicles are stored for more than running time, so the state of charge of high-voltage lithium batteries and low-voltage storage batteries of fuel cell vehicles in storage needs special attention. At present, the monitoring of the fuel cell system usually adopts manual real-time data collection of the on-site fuel cell system, and each check is susceptible to human limitations and time-consuming, and the reaction speed is slow. Once an error occurs, it will cause huge economic losses and difficulties in the management of the fuel cell system.

[0003] The Chinese patent application with the publication number CN112776674A discloses an intelligent power supplementing system and method for a hydrogen energy vehicle, which comprises a control system, an execution system and a display system. The control system comprises a vehicle-mounted T-BOX and a VCU. The execution system comprises a fuel cell system, a lithium battery system, a boost DC / DC and a 12V DC / DC. The display system comprises a cloud platform and a mobile phone APP. The vehicle-mounted T-BOX and the VCU are connected through CAN communication. The output end of the fuel cell system is connected with the boost DC / DC. The output ends of the lithium battery system and the boost DC / DC are connected with the 12V DC / DC. The output end of the 12V DC / DC is connected with a 12V storage battery. The output end of the vehicle-mounted T-BOX is connected with the cloud platform. The cloud platform is connected with the mobile phone APP. The intelligent power supplementing system and method for the hydrogen energy vehicle supplement the power of the 12V storage battery through the VCU control of the high-voltage lithium battery system and the fuel cell system according to the power monitoring of the battery by the vehicle-mounted T-BOX. The power supplementing mode is single, and the power supplementing circuit is complex.

[0004] Therefore, it is a technical problem to be solved to develop an intelligent power supplementing system for a hydrogen fuel cell vehicle on-board storage battery which can solve the power supplementing problems of the power lithium battery and the low-voltage storage battery and simplify the circuit. SUMMARY

[0005] In view of the above defects of the prior art, the present application provides a multi-in-one power supplementing system and method for a hydrogen fuel cell vehicle on-board storage battery to solve the problems of intelligent power supplementing for the power lithium battery and the low-voltage storage battery and complex circuit.

[0006] To achieve the above object, in one aspect, the application provides a hydrogen fuel cell vehicle on-board battery multi-in-one power supply system, comprising a vehicle controller and a data monitoring center, the data monitoring center comprising a cloud platform and a data display screen, characterized in that it further comprises a wireless transceiving and detecting system and a power supply system; the wireless transceiving and detecting system comprises a vehicle remote terminal TBOX and a battery management system BMS; the TBOX and the cloud platform are connected through mobile wireless connection; the BMS has a timing wake-up function and a function of collecting the voltage of the on-board battery; the power supply system comprises a fuel cell system, a fuel cell DC / DC voltage boosting assembly, a multi-in-one control system, a vehicle lithium battery system, a vehicle low-voltage storage battery system and a DC / DC voltage reducing assembly; the TBOX, the BMS, the DC / DC voltage reducing assembly, the fuel cell system and the vehicle controller are connected through CAN communication; the fuel cell system, the fuel cell DC / DC voltage boosting assembly, the lithium battery system, the DC / DC voltage reducing assembly and the low-voltage storage battery system are connected through a high-voltage direct-current bus in sequence.

[0007] Preferably, the mobile wireless connection between the TBOX and the cloud platform is carried out through LTE, FDD / LTE or TDD / TD-SCDMA / WCDMA / CDMA / GSM network mode.

[0008] Preferably, the timing wake-up function of the BMS comprises that the BMS is woken up once every 24 hours in a sleep state to detect the voltage.

[0009] Preferably, the function of the BMS of collecting the voltage of the on-board battery comprises collecting the voltage of the low-voltage storage battery and the lithium battery.

[0010] Preferably, the BMS has a voltage collection module to collect the voltage of the 12V or 24V low-voltage storage battery to determine the power of the storage battery.

[0011] Preferably, the BMS collects the voltage data of the lithium battery monomer collected by the lithium battery panel slave collection unit.

[0012] In another aspect, the application provides a hydrogen fuel cell vehicle on-board battery multi-in-one power supply method, characterized in that it comprises the following steps:

[0013] The BMS sleeps for a period of time, and when the timing wake-up time is reached, the BMS starts to detect the voltage of the low-voltage storage battery and the lithium battery. If the power of the storage battery or the voltage of the lithium battery is lower than the respective set threshold, the power supply process is started. If neither condition is met, the BMS enters a power-off sleep strategy and waits for the next wake-up time.

[0014] After starting the power compensation process, the BMS reports the power compensation instruction to the vehicle network. After the vehicle controller is woken up by the BMS, it is determined whether the power compensation can be performed by monitoring the vehicle state. If all nodes are not faulty, the vehicle controller enables the low-voltage power of the nodes and parts of the system to be compensated, enters the remote power compensation mode, and uploads to the cloud platform through the TBOX. The cloud platform displays the current state and the expected power compensation time through the data monitoring center and notifies the user through the mobile phone message.

[0015] The power compensation mode includes three types, i.e., a power compensation mode M1, a power compensation mode M2 and a power compensation mode M3, and the vehicle controller determines which mode to enter.

[0016] The power compensation mode M1 is to compensate the lithium battery and the low-voltage storage battery by the fuel cell system; the power compensation mode M2 is to compensate the lithium battery by the fuel cell system; and the power compensation mode M3 is to compensate the low-voltage storage battery by the lithium battery.

[0017] Preferably, the power compensation mode M1 needs to wake up the fuel cell system, the fuel cell DC / DC booster assembly, the vehicle-mounted lithium battery system, the vehicle-mounted low-voltage storage battery system and the DC / DC step-down assembly by the multi-in-one control system.

[0018] Preferably, the power compensation mode M2 needs to wake up the fuel cell system, the fuel cell DC / DC booster assembly and the vehicle-mounted lithium battery system by the multi-in-one control system.

[0019] Preferably, the power compensation mode M3 needs to wake up the vehicle-mounted lithium battery system, the vehicle-mounted low-voltage storage battery system and the DC / DC step-down assembly by the multi-in-one control system.

[0020] Compared with the prior art, the above-mentioned application has the following advantages or beneficial effects:

[0021] (1) According to the state of the vehicle and the vehicle-mounted lithium battery and the low-voltage storage battery, the power compensation mode is selected, and the corresponding components are woken up and operated according to different power compensation modes, so as to reduce the energy consumption and improve the power compensation efficiency.

[0022] (2) Through the design of the multi-in-one signal communication line and the high-voltage bus line, the functionality of the line is realized, and the power compensation line is optimized.

[0023] (3) The power of the vehicle-mounted lithium battery and the low-voltage storage battery is monitored and intelligently compensated by the BMS, so as to avoid the high energy consumption caused by the frequent wake-up of the vehicle.

[0024] (4) The intelligent power compensation system is connected to the cloud platform through the remote terminal, so as to realize the whole-process monitoring of the power compensation process.

[0025] The application discloses a hydrogen fuel cell vehicle-mounted storage battery multi-in-one power supply system, which comprises a vehicle controller, a data monitoring center, a wireless transceiving and detecting system and a power supply system. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application and its features, shapes and advantages will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference signs indicate the same parts throughout the drawings. The drawings are not necessarily drawn to scale, the emphasis being on illustrating the principle of the application.

[0027] Figure 1 A low-voltage signal circuit diagram of the multi-in-one power supply system of the application;

[0028] Figure 2 A high-voltage power circuit diagram of the multi-in-one power supply system of the application;

[0029] Figure 3 A working flowchart of the multi-in-one power supply method of the application. DETAILED DESCRIPTION

[0030] The structure of the application will be further described below in combination with the drawings and specific embodiments, but is not limited to the application.

[0031] Example 1

[0032] As Figure 1 and Figure 2As shown, a hydrogen fuel cell vehicle on-board battery all-in-one power supply system includes a vehicle controller, a data monitoring center including a cloud platform and a data display screen, and a wireless transceiving and detection system and a power supply system; the wireless transceiving and detection system includes a vehicle-mounted remote terminal TBOX and a battery management system BMS; the TBOX and the cloud platform are wirelessly connected through a 4G FDD / LTE network; the BMS has a timing wake-up function and a function of collecting the voltage of the on-board battery; the timing wake-up function of the BMS includes that the BMS is woken up once every 24 hours in a sleep state to detect the voltage. The BMS can simultaneously collect the voltage and capacity of the on-board lithium battery and the voltage of the 12V / 24V low-voltage storage battery. The BMS collects the voltage data of the lithium battery monomer collected by the lithium battery panel slave collection unit. The power supply system includes a fuel cell system, a fuel cell DC / DC boost component, an all-in-one control system, an on-board lithium battery system, an on-board low-voltage storage battery system, and a DC / DC step-down component; the TBOX, the BMS, the DC / DC step-down component, the fuel cell system, and the vehicle controller are connected through CAN communication; the fuel cell system, the fuel cell DC / DC boost component, the lithium battery system, the DC / DC step-down component, and the low-voltage storage battery system are sequentially connected through a high-voltage DC bus.

[0033] The mobile wireless connection between the TBOX and the cloud platform can also be through an LTE or TDD / TD-SCDMA / WCDMA / CDMA / GSM network mode.

[0034] Embodiment 2

[0035] As Figure 3 As shown, a method for using the all-in-one power supply system in embodiment 1 to supply power to the on-board battery of a hydrogen fuel cell vehicle includes the following steps:

[0036] When the vehicle key (KL15) is in an off state, the BMS is in a normal timing wake-up state, and if the 24-hour condition is met, the BMS is woken up and enters a power supply process judgment.

[0037] If the lithium battery meets the power supply condition or the low-voltage storage battery meets the power supply condition, the VCU is woken up; if the power supply condition is not met, the BMS enters a low-voltage power-off link and waits for the next 24-hour condition to be met to wake up. The power supply condition of the lithium battery is that the SOC, system total voltage, monomer voltage, or system average voltage is lower than the respective threshold value. The power supply condition of the low-voltage storage battery is that for a 24V system, the voltage is lower than 20V; for a 12V system, the voltage is lower than 10V.

[0038] The vehicle controller judges the fault conditions of each node of the vehicle, if there is no fault, the high voltage power-on condition is met, and the remote power supply mode is entered, and the TBOX is uploaded to the cloud platform, the cloud platform is displayed through the data monitoring center, and the user is notified through the mobile phone message, the current state and the expected power supply time.

[0039] If the lithium battery and the low-voltage storage battery both meet the power supply condition, the power supply mode M1 is entered, and the lithium battery and the low-voltage storage battery are supplied power together. The power supply mode M1 needs the multi-in-one control system to wake up the fuel cell system, the fuel cell DC / DC boost component, the vehicle-mounted lithium battery system, the vehicle-mounted low-voltage storage battery system and the DC / DC buck component. If only the lithium battery meets the power supply condition, the power supply mode M2 is entered, and only the lithium battery is supplied power. The power supply mode M2 needs the multi-in-one control system to wake up the fuel cell system, the fuel cell DC / DC boost component and the vehicle-mounted lithium battery system. If only the low-voltage storage battery meets the power supply condition, the power supply mode M3 is entered, and the low-voltage storage battery is supplied power by the lithium battery. The power supply mode M3 needs the multi-in-one control system to wake up the vehicle-mounted lithium battery system, the vehicle-mounted low-voltage storage battery system and the DC / DC buck component. When the power supply is completed, the power supply flag bit is set to 1, the vehicle controller judges the set 1 power supply flag bit, enters the high voltage power-off process, issues a high voltage power-off request, and after the high voltage power-off is completed, the vehicle controller makes the low voltage power-off, at this time, the power supply is completed, and the power supply is ended.

[0040] In summary, the multi-in-one power supply system of the hydrogen fuel cell vehicle vehicle-mounted storage battery disclosed by the application comprises a vehicle controller, a data monitoring center, a wireless transceiving and detecting system and a power supply system. The wireless transceiving and detecting system comprises a vehicle-mounted remote terminal TBOX and a battery management system BMS; the TBOX is connected with the cloud platform through mobile wireless connection; the BMS has the functions of timing wake-up and collecting vehicle-mounted storage battery voltage; the power supply system comprises a fuel cell system, a fuel cell DC / DC boost component, a multi-in-one control system, a vehicle-mounted lithium battery system, a vehicle-mounted low-voltage storage battery system and a DC / DC buck component. The power supply method based on the power supply system can realize three power supply modes, which are used for supplying power to the lithium battery system or the low-voltage storage battery system alone or realizing the simultaneous power supply of the lithium battery system and the low-voltage storage battery system. The multi-in-one power supply system and method optimize the power supply circuit, reduce energy consumption and improve power supply efficiency.

[0041] Those skilled in the art should understand that those skilled in the art can realize the variants in combination with the prior art and the above-mentioned embodiments, which are not described here. Such variants do not affect the essential content of the application, and are not described here.

[0042] The preferred embodiments of the present application have been described. It is to be understood that the application is not limited to the above specific embodiments, and that devices and structures not described in detail should be understood to be implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, still belongs to the scope of protection of the technical solutions of the present application.

Claims

1. A method for charging a hydrogen fuel cell vehicle on-board battery, characterized by, The application discloses a multi-in-one power supplement system of a hydrogen fuel cell vehicle on-board storage battery, which comprises a vehicle controller and a data monitoring center; the data monitoring center comprises a cloud platform and a data display screen, and further comprises a wireless transceiving and detecting system and a power supplement system. The wireless transceiving and detecting system comprises a vehicle on-board remote terminal TBOX and a battery management system BMS; the TBOX is connected with the cloud platform through mobile wireless connection; the BMS is provided with a timing wake-up function and a function of collecting the voltage of the vehicle on-board storage battery. The power supplement system comprises a fuel cell system, a fuel cell DC / DC voltage boosting assembly, a multi-in-one control system, a vehicle on-board lithium battery system, a vehicle on-board low-voltage storage battery system and a DC / DC voltage reducing assembly. The TBOX, the BMS, the DC / DC voltage reducing assembly, the fuel cell system and the vehicle controller are connected through CAN communication. The fuel cell system, the fuel cell DC / DC voltage boosting assembly, the vehicle on-board lithium battery system, the DC / DC voltage reducing assembly and the low-voltage storage battery system are sequentially connected through a high-voltage direct-current bus. The multi-in-one power supplement method comprises the following steps: The BMS is in a sleep state, and when the timing wake-up time is reached, the BMS starts to detect the voltage of the low-voltage storage battery and the lithium battery; if the voltage of the low-voltage storage battery or the lithium battery is lower than the set threshold value, the power supplement process is started; if none of the conditions is met, the BMS enters a power-off sleep strategy and waits for the next wake-up time. After the power supplement process is started, the BMS reports the power supplement instruction to the vehicle network; after the vehicle controller is woken up by the BMS, whether the power can be supplemented is confirmed by monitoring the vehicle state; if all nodes are free from faults, the vehicle controller supplies low-voltage power to the nodes and parts of the battery system to be supplemented, enters a remote power supplement mode, and simultaneously uploads to the cloud platform; the cloud platform displays through the data monitoring center and notifies the user through a mobile phone short message about the current state and the expected power supplement time. The remote power supplement mode comprises three categories, namely, a power supplement mode M1, a power supplement mode M2 and a power supplement mode M3, and the vehicle controller determines which mode to enter. The power supplement mode M1 is that the fuel cell system supplements power for the lithium battery and the low-voltage storage battery; the power supplement mode M2 is that the fuel cell system supplements power for the lithium battery; and the power supplement mode M3 is that the lithium battery supplements power for the low-voltage storage battery. The power supplement mode M1 wakes up the fuel cell system, the fuel cell DC / DC voltage boosting assembly, the vehicle on-board lithium battery system, the vehicle on-board low-voltage storage battery system and the DC / DC voltage reducing assembly through the multi-in-one control system. The power supplement mode M2 wakes up the fuel cell system, the fuel cell DC / DC voltage boosting assembly and the vehicle on-board lithium battery system through the multi-in-one control system. The power supplement mode M3 wakes up the vehicle on-board lithium battery system, the vehicle on-board low-voltage storage battery system and the DC / DC voltage reducing assembly through the multi-in-one control system.

2. The multi-functional charging method for on-board batteries of a hydrogen fuel cell vehicle according to claim 1, characterized in that, The mobile wireless connection between the TBOX and the cloud platform is carried out through LTE, FDD / LTE or TDD / TD-SCDMA / WCDMA / CDMA / GSM network mode.

3. The multi-functional charging method for on-board batteries of a hydrogen fuel cell vehicle according to claim 1, characterized in that, The timing wake-up function of the BMS includes that the BMS is woken up once every 24 hours in a sleep state to perform voltage detection.

4. The multi-functional charging method for on-board batteries of a hydrogen fuel cell vehicle according to claim 1, characterized in that, The BMS has a collection module to collect 12V or 24V low-voltage battery voltage to judge the battery capacity through the voltage.

5. The multi-functional charging method for on-board batteries of a hydrogen fuel cell vehicle according to claim 1, characterized in that, The BMS collects voltage data of lithium battery monomers collected by a lithium battery panel slave collection unit.

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