Portable integrated service digital network (OTA) upgrading equipment and method for electric vehicle instrument

Abstract

The invention discloses a portable integrated service digital network OTA upgrading device for an electric vehicle instrument. The portable integrated service digital network OTA upgrading device comprises a device shell, a program storage module, an interface module, a power management module, an integrated service digital network communication module and a man-machine interaction module. The external upgrading interface reserved by the instrument is connected with the integrated service digital network communication module, so that the shell dismounting operation is avoided, the structural integrity of the instrument is protected, the upgrading safety and efficiency are improved, the upgrading can be completed by several seconds instead of tens of minutes of original dismounting, and the equipment integrates storage, control and communication functions without depending on a PC (Personal Computer) or a special programmer; the intelligent instrument upgrading system can be placed in a pocket and is suitable for field scenes such as a production line, an after-sales service station and a maintenance station, the program storage module arranged in the intelligent instrument upgrading system can store upgrading programs of multiple types of target instruments, full-automatic intelligent upgrading can be achieved, automatic instrument model identification, automatic program matching and automatic burning triggering are supported, the technical requirements for operators are greatly lowered, and the intelligent instrument upgrading system is high in practicability and high in practicability. And human errors are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle electronic control, in particular to a portable one-wire OTA upgrade device and method for electric vehicle instrument. BACKGROUND

[0002] The electric vehicle instrument panel is a device for displaying various operating states and key information of the electric vehicle, and is an important interface for communication between the driver and the vehicle.

[0003] At present, if the electric vehicle instrument needs to update the firmware after leaving the factory, such as repairing software defects, adding new functions, etc., the traditional physical burning method is generally used. This method usually includes the following steps: first, disassemble the instrument shell to expose the internal debugging interface; then use a special programmer to connect to the interface through a Dupont line or a probe; finally, run the burning software on the PC to complete the program flashing.

[0004] However, the above prior art has the following significant defects: (1) Complicated operation and easy damage to the device: frequent disassembly and assembly of the instrument shell not only consumes time and effort, but also easily damages the shell buckle or internal structure, affecting the sealing and reliability of the instrument; (2) High professional threshold: the operator needs to have electronic engineering knowledge and be able to accurately identify and connect the debugging pins, and wiring errors may cause damage to the instrument or programmer; (3) Dependence on external equipment: must be connected to a computer and a special programmer, cannot achieve on-site quick response, poor flexibility; (4) Lack of universality: different models of instruments usually require different firmware and burning configurations, and the tool is difficult to reuse.

[0005] Therefore, we propose a portable one-wire OTA upgrade device and method for electric vehicle instrument. SUMMARY

[0006] The purpose of the present application is to provide a portable one-wire OTA upgrade device and method for electric vehicle instrument to solve the problems in the background art.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a portable one-wire OTA upgrade device for electric vehicle instrument, comprising: Device housing: the device housing is used for component installation and bearing; Master control module: the master control module is used to control the electric vehicle instrument upgrade process; Program storage module: the program storage module is integrated in the main control module, the main control module is electrically connected with the program storage module, and the program storage module is used for storing upgrade program files of a plurality of target instruments and automatically matching with the identified target instruments; Interface module: the interface module is a data and power supply composite interface of the equipment, and the interface module is used for downloading instrument program of different models of electric vehicles and storing the program; Power management module: the power management module is electrically connected with the interface module, and the power management module is used for supplying power to the equipment module; One-wire communication module: the one-wire communication module is electrically connected with the main control module, and the one-wire communication module realizes the bidirectional data communication between the main control module and the target instrument; Man-machine interaction module: the man-machine interaction module is used for prompting the device state and program burning action.

[0008] As a further description of the above technical solution: The main control module adopts a microcontroller MCU, and the interface module selects a Type-C interface.

[0009] As a further description of the above technical solution: The man-machine interaction module includes an OLED display screen and a plurality of groups of LED indicator lights, and the OLED display screen and the plurality of groups of LED indicator lights are used for displaying the running state of the equipment.

[0010] As a further description of the above technical solution: The interface module is electrically connected with the main control module and the power management module respectively, the output end of the main control module is electrically connected with the program storage module, the one-wire communication module and the man-machine interaction module respectively, the one-wire communication module includes a signal line and a ground wire, one end of the signal line is connected with an external upgrade interface reserved by the target instrument, and the other end of the signal line is electrically connected with the microcontroller MCU of the main control module.

[0011] As a further description of the above technical solution:

[0012] The program storage module selects a Flash memory built in a microcontroller MCU, and the program storage module selects the microcontroller MCU to interact with the main control module.

[0013] As a further description of the above technical solution:

[0014] The power management module selects an AMS117-3.3LDO voltage stabilizing chip, the AMS117-3.3LDO voltage stabilizing chip stabilizes the voltage input by the interface module to 3.3V, and the power management module supplies power to the main control module, the one-wire communication module and the man-machine interaction module.

[0015] As a further description of the above technical solutions: The one-line communication module comprises: The power input end is used for accessing external power supply; The voltage conversion unit is electrically connected with the power input end, and is used for converting the input voltage into stable 5V direct current voltage; The signal driving unit is electrically connected with the output end of the voltage conversion unit, and comprises an NPN transistor and a base bias resistor network matched with the NPN transistor, the collector of the NPN transistor is connected to the 5V power supply, the emitter of the NPN transistor is grounded, and the base of the NPN transistor is connected to the communication output pin of the microcontroller through a resistor; The communication interface comprises a single-wire signal line and a ground wire, one end of the single-wire signal line is connected between the collector of the NPN transistor and an upper pull resistor, and the other end of the single-wire signal line is connected with the boot program communication interface of the external electric vehicle instrument.

[0016] As a further description of the above technical solutions: The one-line OTA upgrading method for the portable electric vehicle instrument comprises the following steps: Step one: program pre-storage: download and store the upgrading program files corresponding to multiple target instrument models into the program storage module through the interface module; Step two: physical connection: connect the signal line and the ground wire into the upgrading interface reserved in the target instrument; Step three: target instrument automatic identification and upgrading: turn on the power supply of the target instrument by using the working power supply of the electric vehicle, and actively send the program files that need to be upgraded to the target instrument through the signal line for data upgrading; Step four: upgrading display: after the target instrument is successfully upgraded, the OLED display screen and multiple groups of LED indicator lights of the man-machine interaction module emit the upgrading completion indication.

[0017] As a further description of the above technical solutions: The step three target instrument automatic identification and upgrading comprises the following steps: Step S1: after the power supply of the target instrument is turned on, the target instrument is provided with a boot program, and the boot program sends a handshake signal or target instrument model information to the upgrading device through the signal line; Step S2: after the target instrument model information is received by the signal line by the master control module, the target instrument model information is compared with the data of the program storage module, and the program storage module matches the upgrading program files adapted to the target instrument model; Step S3: The main control module sends the upgrade program file to the target instrument through the signal line; Step S4: The boot program of the target instrument receives the upgrade program file, and then the boot program performs the erase, burn and check work.

[0018] Compared with the prior art, the present application has the following beneficial effects: (1) The present application uses the external upgrade interface reserved by the instrument to connect with the one-line communication module, avoids disassembly operation, protects the integrity of the instrument structure, improves the upgrade safety and efficiency, and can improve the original disassembly time of dozens of minutes to several seconds of upgrade completion; (2) The device of the present application integrates storage, control and communication functions, does not need to rely on PC or special programmer, can be put into the pocket, and is suitable for on-site scenes such as production line, after-sales, maintenance station, etc.; (3) The program storage module provided in the present application can store upgrade programs of multiple types of target instruments, can realize full-automatic intelligent upgrade, supports automatic identification of instrument model, automatic matching of program, automatic triggering of burning, greatly reduces the technical requirements for operators, and reduces human errors. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the system principle of the present application;

[0020] Figure 2 is a schematic diagram of the physical structure of the present application;

[0021] Figure 3 is a schematic diagram of the system principle of the upgrade method of the present application;

[0022] Figure 4 is a schematic diagram of the one-line communication module circuit of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Embodiment one: Please refer to Figures 1-4 The present application provides a technical solution: a portable one-line OTA upgrade device for electric vehicle instrument, which comprises: Device housing: the device housing is used for component installation and bearing; The main control module is used for being responsible for controlling the instrument upgrade process of the electric vehicle; The program storage module is integrated in the main control module, and the main control module is electrically connected with the program storage module. The interface module is a data and power supply composite interface of the device, and is used for downloading and storing programs of different models of electric vehicle instruments. The power management module is electrically connected with the interface module, and is used for supplying power to the device module. The one-wire communication module is electrically connected with the main control module, and realizes the bidirectional data communication between the main control module and the target instrument. The man-machine interaction module is used for prompting the device state and the program burning action.

[0025] The one-wire communication module is directly connected with the instrument reserved interface, without disassembling the instrument shell, which avoids the risk of component damage caused by disassembling the instrument, and shortens the upgrade operation time from dozens of minutes to dozens of seconds in the traditional way, significantly improving the operation efficiency in the scenes of after-sales and production line, and the program storage module is integrated in the main control module and supports multiple program storage, which realizes the rapid upgrade without professional electronic knowledge of the operator, and the interface module has the functions of data transmission and power supply, without the need of additional special programmer, computer and other equipment, and the device can independently complete the program pre-storage and on-site upgrade, realize the portable experience of pocket-level tool, adapt to mobile operation scenes such as outdoor and vehicle site, and the program storage module is integrated in the main control module, which reduces the external wiring and the number of components, reduces the probability of device failure, realizes the adaptation of one tool to multiple instruments by pre-storing multiple model programs, reduces the tool procurement and management cost, the man-machine interaction module prompts the device state and the upgrade progress in real time, the operator can quickly confirm the upgrade result, avoids invalid waiting or misjudgment, and further improves the operation efficiency.

[0026] The main control module adopts a microcontroller MCU, and the interface module selects a Type-C interface.

[0027] The microcontroller MCU has high integration and low power consumption characteristics, can stably bear the control logic of the upgrade process, can control the overall cost of the equipment, is suitable for batch production and tooling application scenarios, and supports peripheral interface expansion, can adapt to the access needs of different types of one-line communication modules and storage modules, is convenient for subsequent upgrading of equipment functions according to new instrument models, and prolongs the life cycle of the tool. The Type-C interface is a current mainstream universal interface, which can directly match common devices such as computer and mobile phone chargers, is convenient for technical personnel to quickly download multi-model upgrade programs, and can supply power to the equipment at any time.

[0028] The human-computer interaction module includes an OLED display screen and a plurality of groups of LED indicator lights, the OLED display screen and the plurality of groups of LED indicator lights are used to show the running state of the equipment, and the plurality of groups of LED indicator lights can select different colors to display different system update situations.

[0029] The combination of the OLED display screen and the plurality of groups of LED indicator lights can provide real-time feedback of the system upgrade state.

[0030] The interface module is electrically connected with the main control module and the power management module, the output end of the main control module is electrically connected with the program storage module, the one-line communication module and the human-computer interaction module, the one-line communication module includes a signal line and a ground line, one end of the signal line is connected with the external upgrade interface reserved by the target instrument, and the other end of the signal line is electrically connected with the microcontroller MCU of the main control module.

[0031] The program storage module selects the Flash memory built in the microcontroller MCU, and the program storage module selects the microcontroller MCU to interact with the main control module.

[0032] The program storage module selects the Flash memory built in the microcontroller MCU, and the program storage module selects the microcontroller MCU to interact with the main control module.

[0033] The power management module selects an AMS117-3.3LDO voltage stabilizing chip, the AMS117-3.3LDO voltage stabilizing chip stabilizes the voltage input by the interface module to 3.3V, and the power management module supplies power to the main control module, the one-line communication module and the human-computer interaction module.

[0034] The AMS117-3.3LDO voltage stabilizing chip has excellent voltage stabilizing precision and ripple suppression capability, can stabilize the voltage input by the Type-C interface to 3.3V standard working voltage, avoids interference on sensitive circuits such as the main control module and the communication module caused by voltage fluctuation, greatly reduces the risk of program transmission failure and module damage of the equipment caused by abnormal power supply during the upgrading process, and the AMS117-3.3LDO voltage stabilizing chip is a mature general voltage stabilizing chip, the input voltage range of which is adapted to the 5V output of the Type-C interface, and no additional voltage conversion circuit needs to be designed.

[0035] Embodiment two: Please refer to Figure 4 , the one-wire communication module comprises: The power input end is used for accessing external power supply; The voltage conversion unit is electrically connected with the power input end, and is used for converting the input voltage into stable 5V direct current voltage; The signal driving unit is electrically connected with the output end of the voltage conversion unit, the signal driving unit comprises an NPN transistor and a base bias resistor network matched with the NPN transistor, the collector of the NPN transistor is connected to the 5V power supply, the emitter of the NPN transistor is grounded, and the base of the NPN transistor is connected to the communication output pin of the microcontroller through a resistor; The communication interface comprises a single-wire signal line and a ground wire, one end of the single-wire signal line is connected between the collector of the NPN transistor and an upper pull resistor, and the other end of the single-wire signal line is connected with the boot program communication interface of the external electric vehicle instrument; The collector of the NPN transistor is connected to the 5V power supply through an upper pull resistor, the emitter of the NPN transistor is grounded, the base of the NPN transistor is connected to the main control module through a current limiting resistor, the collector of the NPN transistor simultaneously serves as a communication signal output point and is connected to the target instrument, when the main control module outputs a high level, the base of the NPN transistor is current-conductive, at this time, the NPN transistor is saturated and conductive, the collector of the NPN transistor is pulled down to close to 0V, at this time, the single-wire signal line outputs a low level, at this time, the device actively sends a "0" signal to the instrument, when a high level is sent, when the main control chip outputs a low level or a high resistance state, the NPN transistor is cut off, at this time, the collector of the NPN transistor is no longer grounded, the upper pull resistor pulls the signal line to 5V, at this time, the single-wire signal line presents a high level, at this time, if the target instrument needs to send data, bidirectional communication can also be realized by pulling down the bus through the internal pull-down structure of the target instrument; When data needs to be received, the main control module switches to input mode. By reading the pin level of the main control module, it can be determined whether the bus is high or low, thereby receiving the model information, ACK / NACK and other response signals returned by the instrument. This setting uses only one signal line to achieve bidirectional communication, without the need for separate TX / RX lines or clock lines, which greatly simplifies the interface design. It is especially suitable for scenarios where only two solder points are reserved on the instrument housing. Moreover, it only requires one general-purpose NPN transistor and multiple resistors and capacitors. There are no dedicated ICs or high-frequency signals, the PCB layout is simple, and it is not easily affected by noise interference. Compared with optocouplers, digital isolators and other solutions, it is more economical and suitable for consumer electric vehicle products. The signal driving unit, under the control of the microcontroller, can drive the single-wire signal line to a high level and hold it to a low level, thereby completing single-wire bidirectional data transmission. The communication module does not require an additional clock line or data line, and only relies on the single-wire signal line to achieve full-duplex communication between the master and slave devices. It also supports automatic identification of the instrument model and triggering the firmware burning process. The voltage conversion unit uses an MC34060 integrated voltage regulator chip, whose input terminal is connected to an external power supply and whose output terminal outputs a 5V voltage. It also includes a bypass capacitor to suppress ripple. The single-wire signal line in the communication interface is also connected in series with a reverse protection diode to prevent module damage due to wiring errors.

[0036] Example 3: Please see Figures 1-4 The portable one-wire OTA upgrade method for electric vehicle instrument panels includes the following steps: Step 1: Program Pre-storage: Download and store the upgrade program files corresponding to multiple target instrument models into the program storage module via the interface module; Step 2: Physical connection: Connect the signal line and grounding line to the upgrade interface reserved in the target instrument; Step 3: Automatic identification and upgrade of target instrument: Power on the target instrument using the electric vehicle's power supply, and actively send the program file to be upgraded to the target instrument via a signal line to perform data upgrade; Step 4: Upgrade Demonstration: After the target instrument is successfully upgraded, the upgrade is completed by displaying an indicator on the OLED screen of the human-machine interaction module and multiple LED indicators.

[0037] The device connects directly to the instrument's reserved interface via a one-line communication module, eliminating the need to disassemble the instrument casing. This avoids the risk of component damage caused by disassembly and reduces upgrade operation time from tens of minutes to tens of seconds, significantly improving operational efficiency in after-sales and production line scenarios. The included program storage module is integrated into the main control module and supports multiple program storage. Combined with the main control module's automatic identification function, operators do not need professional electronics knowledge to perform matching upgrades upon power connection, effectively avoiding human error in program selection and improving upgrade consistency. The interface module combines data transmission and power supply functions, eliminating the need for additional dedicated programmers, computers, or other equipment. The device can independently complete program pre-storage and on-site upgrades. The program storage module integrated into the main control module reduces the number of external wiring and components, lowering the probability of equipment failure and enabling "one tool to adapt to multiple instruments" by pre-storing multiple models of programs, reducing tool procurement and management costs.

[0038] Please see Figures 1-4 The third step, automatic target instrument identification and upgrade, includes the following steps: Step S1: After the target instrument is powered on, the target instrument has a built-in boot program. The boot program sends a handshake signal or the target instrument model information to the upgrade device through the signal line. Step S2: After the main control module receives the target instrument model information via the signal line, it compares the target instrument model information with the data in the program storage module, and the program storage module matches the upgrade program file that is compatible with the target instrument model. Step S3: The main control module actively sends the upgrade program file to the target instrument via the signal line; Step S4: The target instrument's bootloader receives the upgrade program file, and then the bootloader performs the erase, write, and verification operations.

[0039] The entire process, from the instrument actively sending model information and the main control module automatically matching the program, to actively transmitting the upgrade package and the instrument automatically performing erase and write verification, requires no manual intervention. Operators only need to complete physical wiring and power-on. The instrument actively reports its model and the main control module automatically compares the stored data, replacing the traditional manual program selection. This completely eliminates problems such as instrument firmware damage and functional abnormalities caused by selecting the wrong upgrade package, significantly improving the accuracy and security of the upgrade process. Moreover, the main control module actively sends the upgrade package to the instrument after matching the program, without the need for manual triggering of transmission commands. Combined with the automatic erase and write verification of the instrument's boot program, the upgrade process time is greatly reduced, significantly improving the efficiency of on-site operations. Furthermore, the instrument's built-in boot program completes the entire process of erasing, writing, and verification, avoiding interference from external operations on the instrument system. At the same time, the verification process can verify the integrity of the upgrade package in real time, further reducing the probability of upgrade failure and ensuring the stable operation of the instrument after the upgrade.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable one-wire OTA upgrade device for electric vehicle instrument panels, characterized in that: The portable one-wire OTA upgrade device for electric vehicle instruments comprises: A device shell for component mounting and bearing; A master control module for controlling the electric vehicle instrument upgrade process; A program storage module integrated in the master control module, which is electrically connected to the master control module and is used to store upgrade program files of multiple target instruments and automatically match with the identified target instrument; An interface module, which is a data and power supply composite interface of the device, and is used to download and store programs of different models of electric vehicle instruments; A power management module, which is electrically connected to the interface module and provides power for the device modules; A one-wire communication module, which is electrically connected to the master control module and realizes bidirectional data communication between the master control module and the target instrument; A human-computer interaction module, which is used to display the device state and program burning action prompt.

2. The portable one-wire OTA upgrade device for electric vehicle gauges of claim 1, wherein: The master control module adopts a microcontroller MCU, and the interface module selects a Type-C interface.

3. The portable one-wire OTA upgrade device for an electric vehicle gauge of claim 2, wherein: The human-computer interaction module comprises an OLED display screen and multiple groups of LED indicator lights, which are used to display the device running state.

4. The portable one-wire OTA upgrade device for an electric vehicle gauge of claim 3, wherein: The interface module is electrically connected to the master control module and the power management module, the output end of the master control module is electrically connected to the program storage module, the one-wire communication module and the human-computer interaction module, the one-wire communication module comprises a signal line and a ground line, one end of the signal line is connected to the external upgrade interface reserved by the target instrument, and the other end of the signal line is electrically connected to the microcontroller MCU of the master control module.

5. The portable one-wire OTA upgrade device for an electric vehicle gauge of claim 3, wherein: The program storage module selects a Flash memory built in the microcontroller MCU, and the program storage module selects the microcontroller MCU to interact with the master control module.

6. The portable one-wire OTA upgrade device for an electric vehicle gauge of claim 5, wherein: The power management module selects an AMS117-3.3 LDO voltage stabilizing chip, the AMS117-3.3 LDO voltage stabilizing chip stabilizes the input voltage of the interface module to 3.3V, and the power management module provides power for the master control module, the one-wire communication module and the human-computer interaction module.

7. The portable one-wire OTA upgrade device for an electric vehicle gauge of claim 6, wherein: The one-wire communication module comprises: A power input end for connecting external power supply; A voltage conversion unit electrically connected to the power input end, which is used to convert the input voltage into stable 5V direct current voltage; A signal driving unit electrically connected to the output end of the voltage conversion unit, which comprises an NPN transistor and a base bias resistor network matched with the NPN transistor, the collector of the NPN transistor is connected to a 5V power supply, the emitter of the NPN transistor is grounded, and the base of the NPN transistor is connected to the communication output pin of the microcontroller through a resistor. The communication interface comprises a single signal line and a ground wire, one end of the single signal line is connected between the collector of the NPN transistor and the pull-up resistor, and the other end of the single signal line is connected with the boot program communication interface of the external electric vehicle instrument.

8. A portable one-wire OTA upgrade method for electric vehicle instrument, applicable to the portable one-wire OTA upgrade device for electric vehicle instrument as claimed in any one of claims 1-7, characterized in that: The one-line communication OTA upgrading method for the electric vehicle instrument comprises the following steps: Step one: program pre-storage: download and store the upgrading program files corresponding to multiple target instrument models into the program storage module through the interface module; Step two: physical connection: connect the signal line and the ground wire into the upgrading interface reserved by the target instrument; Step three: target instrument automatic identification and upgrading: turn on the power supply of the target instrument by using the working power supply of the electric vehicle, and actively send the program files to be upgraded to the target instrument through the signal line for data upgrading; Step four: upgrading display: after the target instrument is successfully upgraded, the OLED display screen and multiple groups of LED indicator lights of the human-computer interaction module are used to indicate the completion of the upgrading.

9. The portable one-wire OTA upgrade method for electric vehicle gauges of claim 8, wherein: The step three target instrument automatic identification and upgrading comprises the following steps: Step S1: after the power supply of the target instrument is turned on, the target instrument is provided with a boot program, the boot program sends a handshake signal or target instrument model information to the upgrading device through the signal line; Step S2: after the target instrument model information is received by the main control module through the signal line, the target instrument model information is compared with the data of the program storage module, the program storage module matches the upgrading program files adapted to the target instrument model; Step S3: the main control module actively sends the upgrading program files to the target instrument through the signal line; Step S4: the boot program of the target instrument receives the upgrading program files, and then the boot program performs the erasing, burning and checking work.

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