Low-power-consumption anti-plugging monitoring device based on OBD interface

Abstract

The utility model relates to the technical field of new energy automobiles, in particular to a low-power-consumption anti-plugging monitoring device based on an OBD (On-Board Diagnostic) interface, which comprises an OBD interface, a voltage division circuit, a voltage acquisition module, a main CPU (Central Processing Unit) control unit, a small battery, a first conversion module, a second conversion module and a third conversion module, the first end of the voltage division circuit is connected with the OBD interface, the second end of the voltage division circuit is connected with the first end of the main CPU control unit through the voltage acquisition module, the third end of the voltage division circuit is connected with the second end of the main CPU control unit through the first conversion module, and the third end of the voltage division circuit is further connected with the peripheral circuit through the second conversion module. The fourth end of the voltage division circuit is connected with the small battery through the third conversion module. Therefore, the monitoring device provided by the utility model is lower in circuit power consumption, can be powered by a small battery, and can operate in a lower power consumption mode by collecting the voltage in the voltage division circuit and controlling the state of the peripheral circuit and the interaction between the monitoring device and the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a low-power consumption anti-plugging monitoring device based on an OBD interface. Background Art

[0002] New energy vehicles, particularly their power battery systems, are a crucial component of vehicle safety. Due to factors such as battery materials, manufacturing processes, and operating environment, the performance and safety of power batteries may degrade over time and under varying operating conditions. Monitoring can provide real-time access to battery status parameters such as voltage, current, and temperature, as well as analysis of battery health and risks. This allows for the timely identification and resolution of potential performance degradation and safety hazards, extending battery life and preventing safety incidents such as fires and explosions.

[0003] With the rapid development and widespread adoption of new energy vehicles, the requirements for vehicle monitoring systems are becoming increasingly stringent. The OBD (On-Board Diagnostics) interface is a standardized diagnostic interface used to connect on-board diagnostic equipment to the vehicle's ECU (Electronic Control Unit) for real-time monitoring and diagnosis of the vehicle's operating status. Its performance and efficiency are directly related to the vehicle's overall performance and user experience.

[0004] However, current OBD-based monitoring devices on the market generally suffer from power consumption deficiencies. For example, some monitoring devices, due to poor design or the use of high-power components, consume high amounts of energy over extended periods of use. This places a strain on the battery or other power source, impacting battery life. This not only increases charging frequency and costs, reducing user experience, but can also cause the vehicle battery to run low, preventing the vehicle from starting properly. Furthermore, if the monitoring device is unplugged during vehicle monitoring, the real-time monitoring function will be interrupted, preventing real-time access to the vehicle's location and operational status. This impacts the timeliness, accuracy, and comprehensiveness of vehicle fault diagnosis, depriving the driver of a crucial early warning method and potentially leading to more serious consequences due to failure to detect faults in a timely manner. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a low-power anti-plugging monitoring device based on the OBD interface, so as to overcome the problem that the current existing technology of automobile battery monitoring devices generally has insufficient power consumption.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] The first utility model, an embodiment of the present application provides a low-power anti-plugging monitoring device based on an OBD interface, comprising: an OBD interface, a voltage divider circuit, a voltage acquisition module, a main CPU control unit, a small battery and a conversion module, wherein the conversion module comprises a first conversion module, a second conversion module and a third conversion module;

[0008] The first end of the voltage divider circuit is connected to the OBD interface, the second end of the voltage divider circuit is connected to the first end of the main CPU control unit through the voltage acquisition module, the third end of the voltage divider circuit is connected to the second end of the main CPU control unit through the first conversion module, the third end of the voltage divider circuit is also connected to the peripheral circuit through the second conversion module, and the fourth end of the voltage divider circuit is connected to the small battery through the third conversion module;

[0009] The voltage acquisition module is used to collect the voltage in the voltage divider circuit and transmit the voltage to the main CPU control unit. The main CPU control unit is used to cut off or connect the connection between the voltage divider circuit and the peripheral circuit, and its interaction with the vehicle based on the voltage.

[0010] Furthermore, in some embodiments of the present application, a control circuit is further included, wherein the control circuit includes a diode and an inverter;

[0011] The third terminal of the main CPU control unit is connected to the second conversion module through the control circuit, and the control circuit is used to cut off or conduct the connection between the voltage divider circuit and the peripheral circuit under the control of the main CPU control unit.

[0012] Furthermore, in some embodiments of the present application, the conversion module includes a DC / DC module.

[0013] Furthermore, in some embodiments of the present application, the OBD interface includes a 16-pin female connector of a vehicle OBD interface.

[0014] Furthermore, in some embodiments of the present application, the voltage in the OBD interface includes a first voltage, a second voltage and a third voltage, the first voltage being the voltage provided by the vehicle power supply when the vehicle is in normal working mode, the second voltage being the voltage provided by the vehicle power supply when the vehicle is turned off, and the third voltage being the voltage provided by the small battery.

[0015] Furthermore, in some embodiments of the present application, diodes are provided between the OBD interface and the voltage divider circuit, and between the third conversion module and the voltage divider circuit.

[0016] Furthermore, in some embodiments of the present application, the small battery provides a 6.5V voltage through the third conversion module.

[0017] Furthermore, in some embodiments of the present application, the main CPU control unit is configured to cut off or connect the connection between the voltage divider circuit and the peripheral circuit based on the voltage, including:

[0018] When the voltage of the voltage divider circuit is the first voltage, the main CPU control unit switches on the connection between the voltage divider circuit and the peripheral circuit, and the main CPU control unit exchanges information with the vehicle;

[0019] When the voltage of the voltage divider circuit is less than the first voltage and greater than the second voltage, the main CPU control unit cuts off the connection between the voltage divider circuit and the peripheral circuit, and the main CPU control unit does not exchange information with the vehicle;

[0020] When the voltage of the voltage-dividing circuit is lower than the second voltage, the main CPU control unit sends an early warning signal to a preset cloud.

[0021] The present application provides a low-power anti-plug monitoring device based on an OBD interface, comprising: an OBD interface, a voltage divider circuit, a voltage acquisition module, a main CPU control unit, a small battery and a conversion module, wherein the conversion module comprises a first conversion module, a second conversion module and a third conversion module; the first end of the voltage divider circuit is connected to the OBD interface, the second end of the voltage divider circuit is connected to the first end of the main CPU control unit through the voltage acquisition module, the third end of the voltage divider circuit is connected to the second end of the main CPU control unit through the first conversion module, the third end of the voltage divider circuit is also connected to the peripheral circuit through the second conversion module, and the fourth end of the voltage divider circuit is connected to the small battery through the third conversion module; the voltage acquisition module is used to collect the voltage in the voltage divider circuit and transmit the voltage to the main CPU control unit, and the main CPU control unit is used to cut off or conduct the connection between the voltage divider circuit and the peripheral circuit based on the voltage, and to interact with the vehicle. In this way, the circuit power consumption of the monitoring device provided by the present application is low, and it can also be powered by a small battery, and by collecting the voltage in the voltage divider circuit, controlling the state of the peripheral circuit, and the interaction between the monitoring device and the vehicle, it can further reduce power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1It is a structural diagram of a low-power anti-plugging monitoring device based on the OBD interface provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] Application Overview:

[0026] Existing OBD-based monitoring devices primarily collect data such as voltage, current, and temperature from the BMS via the OBD interface. The data is then transmitted to the vehicle's control unit (ECU) for analysis and processing to determine the performance status of the power battery. The power required for the devices' operation comes from the vehicle's power system, namely the battery. Due to the continuous operation of monitoring devices, prolonged use of the OBD interface or excessive power consumption of external application circuits can lead to rapid battery depletion, impacting normal vehicle operation. Furthermore, for safe operation and management, vehicle monitoring should be a continuous process. If the device itself fails or is unplugged during monitoring, preventing vehicle status feedback and diagnostic information, this could potentially lead to numerous safety issues. Adding an anti-unplug feature, which detects device voltage to determine whether the device is functioning properly and issues an immediate warning of device issues or unplugging, could guide drivers, management, and operations personnel to take timely countermeasures. This would improve the accuracy and stability of monitoring and ensure the proper functioning of vehicle monitoring and management.

[0027] Figure 1 This is a schematic diagram of the structure of the low-power anti-plugging monitoring device based on the OBD interface provided by the embodiment of the present application. Figure 1 The device may include: an OBD interface, a voltage divider circuit, a voltage acquisition module, a main CPU control unit, a small battery and a conversion module, wherein the conversion module includes a first conversion module, a second conversion module and a third conversion module.

[0028] The first end of the voltage divider circuit is connected to the OBD interface, the second end of the voltage divider circuit is connected to the first end of the main CPU control unit through the voltage acquisition module, the third end of the voltage divider circuit is connected to the second end of the main CPU control unit through the first conversion module, the third end of the voltage divider circuit is also connected to the peripheral circuit through the second conversion module, and the fourth end of the voltage divider circuit is connected to the small battery through the third conversion module; the voltage acquisition module is used to collect the voltage in the voltage divider circuit and transmit the voltage to the main CPU control unit. The main CPU control unit is used to cut off or turn on the connection between the voltage divider circuit and the peripheral circuit based on the voltage, and to interact with the vehicle itself.

[0029] Specifically, in the present application, the low-power anti-plugging monitoring device based on the OBD interface mainly utilizes the characteristics of the 16-pin female connector of the OBD interface. Pin 4 of the OBD interface is the vehicle body ground (GND pin), which is one of the negative poles of the OBD interface and is used to provide a ground connection; Pin 16 is the positive pole of the normal power supply (constant power supply) and is defined as the VCC pin. It is connected to the vehicle power supply, i.e., the vehicle battery (small battery), through the vehicle's electrical system, and together with the GND pin, provides power for the connected device module. The OBD interface mentioned in this application is pin 16. In this way, in the monitoring device provided in the present application, the vehicle battery can power the peripheral circuits (such as the CAN data receiving module, the 4G module communication module, and the SD card storage, etc.) and the monitoring device through the OBD interface, the voltage divider circuit, and the second conversion module.

[0030] In the monitoring device provided by the present application, through the above circuit setting, when the vehicle is in normal working mode (READY state or charging state), the on-board charger converts the higher voltage provided by the car power supply to charge the vehicle battery (small battery, normal voltage 12V), which is equivalent to adding a charging voltage to the small battery. The voltage of the small battery rises to a certain extent, generally reaching 13V. At this time, the monitoring device can be powered by the OBD interface, and the voltage in the voltage divider circuit is 13V at this time; on the other hand, when the vehicle is in the off state, the monitoring device can also be provided with a slightly lower voltage by this method; at this time, the voltage in the voltage divider circuit is lower than 13V, generally 12V; and the small battery of the monitoring device can also power the monitoring device through the voltage divider circuit. When the vehicle is disconnected from the monitoring device, the small battery powers the monitoring device. At this time, the voltage in the voltage divider circuit is greater than or equal to the voltage provided by the small battery. In the embodiment of the present application, the voltage that the small battery can provide is 6.5V. That is, the power source of the monitoring device provided by the present application has two paths, one is the voltage from the OBD interface, and the other is the constant voltage converted by the backup small battery through the boost converter.

[0031] That is to say, in the monitoring device provided in the present application, there can be three types of voltages in the voltage divider circuit in the above circuit: the first is when the vehicle is in normal working mode (READY state or charging state), the vehicle battery provides the monitoring device with a voltage (13V, which is the state in which the on-board charger charges the vehicle battery) through the OBD interface, that is, the first voltage; the second is when the vehicle is turned off, the vehicle battery provides the monitoring device with a normal power (12V) through the OBD interface, that is, the second voltage; the third is when the monitoring device is disconnected from the vehicle, the fixed voltage (6.5V) of the small battery of the monitoring device after DC / DC conversion, that is, the third voltage.

[0032] On this basis, the voltage acquisition module is used to collect the voltage in the voltage divider circuit and transmit the voltage to the main CPU control unit. The main CPU control unit is used to cut off or turn on the connection between the voltage divider circuit and the peripheral circuit based on the voltage, and to interact with the vehicle.

[0033] For example, when the voltage in the voltage divider circuit is detected to be 13V, the main CPU control unit sends a corresponding signal, which is used to control the monitoring device to work in normal mode, including turning on the connection between the voltage divider circuit and the peripheral circuit, and maintaining information interaction with the vehicle; when the voltage in the voltage divider circuit is detected to be lower than 13V, specifically 12-13V, the main CPU control unit similarly controls the monitoring device to work in low power mode, including disconnecting the connection between the voltage divider circuit and the peripheral circuit, and stopping information interaction with the vehicle; in addition, when the voltage in the voltage divider circuit is detected to be lower than the vehicle battery voltage, such as 6.5-12V (because in actual application, it is not necessarily the ideal value of 6.5V), the main CPU control unit controls the monitoring device to work in low power mode while sending positioning warning information to the preset cloud, thereby providing relevant personnel through the cloud to realize the unplugging warning of the monitoring device. In this way, the monitoring device circuit provided by the present application not only has low power consumption itself, but can also be powered by a small battery, and by collecting the voltage in the voltage divider circuit, controlling the state of the peripheral circuit, and the interaction between the monitoring device and the vehicle, it can further reduce power consumption and also realize anti-plugging warning.

[0034] It should be noted that the solution provided above in this application is essentially to collect the voltage value in the voltage divider circuit and the main CPU control unit matches the corresponding signal. The content of voltage value and signal matching is the existing technology in the technology and can be implemented through existing functional modules. Therefore, this application does not involve improvements to software methods.

[0035] Based on the above embodiments, Figure 1As shown, in some embodiments of the present application, the monitoring device may further include a control circuit, which may specifically include a diode and an inverter. The third terminal of the main CPU control unit is connected to the second conversion module via the control circuit, and the control circuit is used to disconnect or connect the voltage divider circuit and the peripheral circuit under the control of the main CPU control unit. Furthermore, the first, second, and third conversion modules may each be DC / DC modules, and diodes may be provided between the OBD interface and the voltage divider circuit, and between the third conversion module and the voltage divider circuit, further improving the practicality of the monitoring module and reducing power consumption.

[0036] At this time, when the vehicle is in normal operating mode (READY state or charging state), the on-board charger charges the vehicle battery (small battery), and then powers the monitoring device through the OBD interface. After rectification by diode 11, it flows into the voltage divider circuit. The voltage divider circuit is connected to different DC / DC converters (i.e., the first conversion module, the second conversion module and the third conversion module). The first conversion module converts the voltage down to the working voltage of the main CPU control unit, and the second conversion module converts the voltage down to the corresponding working voltage of the main peripheral circuit (CAN data reception, 4G module communication, SD card storage, etc.).

[0037] In some embodiments of the present application, the first conversion module supplies power to the main CPU control unit, which only requires 3.3V; the second conversion module supplies power to the peripheral circuit, which includes multiple control terminals, each of which requires a voltage greater than 3.3V. Therefore, the first conversion module and the second conversion module are not combined into the same voltage conversion module.

[0038] In this way, the main CPU control unit in the monitoring device monitors the voltage in the voltage divider circuit through a voltage acquisition module such as an A / D acquisition module to control the working state of the monitoring equipment: when the voltage in the circuit is equal to or higher than 13V, the monitoring device is in normal working mode, the main CPU control unit and the vehicle exchange information, and at the same time, the peripheral circuit is connected by controlling the control circuit; when the voltage in the circuit is monitored to be lower than 13V, specifically between 12V-13V, the main CPU control unit controls the monitoring device to enter low power consumption mode, stops exchanging information with the vehicle, and at the same time cuts off the peripheral circuit through the control circuit.

[0039] Among them, in low-power mode, when the main CPU control unit receives a wake-up signal (which can be achieved through periodic pulse signal timed wake-up or external vibration wake-up to further reduce power consumption), the voltage in the voltage divider circuit is monitored through A / D acquisition. When the voltage reaches 13V, the main CPU control unit and the vehicle exchange information, the peripheral circuit is connected, and the monitoring device starts the normal working mode; when the voltage value is lower than between 12V-13V, the main CPU control unit controls the monitoring device to enter low-power mode, stops information exchange with the vehicle, and cuts off the peripheral circuit through the control circuit; when the voltage value is less than the battery voltage (range between 6.5V-12V), the main CPU control unit instantly sends a positioning warning message to the cloud (monitoring device unplugs the warning), and then enters low-power mode, and repeats this cycle.

[0040] The low-power anti-plug monitoring device based on the OBD interface provided by this application has low power consumption. At the same time, when the vehicle is turned off, the low-power anti-plug monitoring device based on the OBD interface enters low-power mode again, and the main CPU control unit controls the peripheral circuits to shut down, effectively reducing the vehicle's energy consumption when parked, which is beneficial for saving energy and extending the service life of the vehicle battery. In addition, the monitoring device provided by this application can adapt to the voltage changes of the vehicle in different states based on the voltage divider circuit, including normal operating mode (13V), normal power (12V) when the vehicle is turned off, and a fixed voltage (6.5V) when the monitoring device is disconnected from the vehicle. This design enables the monitoring device to automatically adjust the operating mode according to different voltage states, accurately improving energy utilization efficiency. And in low-power mode, when the monitored voltage value is less than the battery voltage (range between 6.5V-12V), the main CPU control unit will instantly send a positioning warning message (monitoring device unplug warning) to the cloud, which helps to promptly detect and handle abnormal situations. Ensure the stability of the device connection and the continuity and integrity of the monitoring process, as well as the immediacy of fault diagnosis and warning.

[0041] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is at least two.

[0042] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0043] It should be understood that the various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0044] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0045] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0046] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0047] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A low-power anti-plug monitoring device based on OBD interface, characterized in that: include: OBD interface, voltage dividing circuit, voltage acquisition module, main CPU control unit, small battery and conversion module, the conversion module includes a first conversion module, a second conversion module and a third conversion module; The first end of the voltage divider circuit is connected to the OBD interface, the second end of the voltage divider circuit is connected to the first end of the main CPU control unit through the voltage acquisition module, the third end of the voltage divider circuit is connected to the second end of the main CPU control unit through the first conversion module, the third end of the voltage divider circuit is also connected to the peripheral circuit through the second conversion module, and the fourth end of the voltage divider circuit is connected to the small battery through the third conversion module; The voltage acquisition module is used to collect the voltage in the voltage divider circuit and transmit the voltage to the main CPU control unit. The main CPU control unit is used to cut off or connect the connection between the voltage divider circuit and the peripheral circuit, and its interaction with the vehicle based on the voltage.

2. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: Also included is a control circuit, the control circuit including a diode and an inverter; The third terminal of the main CPU control unit is connected to the second conversion module through the control circuit, and the control circuit is used to cut off or conduct the connection between the voltage divider circuit and the peripheral circuit under the control of the main CPU control unit.

3. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: The conversion module includes a DC / DC module.

4. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: The OBD interface includes a 16-pin female connector of the vehicle OBD interface.

5. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: The voltage in the OBD interface includes a first voltage, a second voltage and a third voltage. The first voltage is the voltage provided by the car power supply when the vehicle is in normal working mode, the second voltage is the voltage provided by the car power supply when the vehicle is turned off, and the third voltage is the voltage provided by the small battery.

6. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: Diodes are provided between the OBD interface and the voltage divider circuit, and between the third conversion module and the voltage divider circuit.

7. The low-power anti-plugging monitoring device based on the OBD interface according to claim 1, characterized in that: The small battery provides a 6.5V voltage through the third conversion module.

8. The low-power anti-plugging monitoring device based on the OBD interface according to claim 5, characterized in that: The main CPU control unit is used to cut off or connect the connection between the voltage divider circuit and the peripheral circuit based on the voltage, and its interaction with the vehicle includes: When the voltage of the voltage divider circuit is the first voltage, the main CPU control unit switches on the connection between the voltage divider circuit and the peripheral circuit, and the main CPU control unit exchanges information with the vehicle; When the voltage of the voltage divider circuit is less than the first voltage and greater than the second voltage, the main CPU control unit cuts off the connection between the voltage divider circuit and the peripheral circuit, and the main CPU control unit does not exchange information with the vehicle; When the voltage of the voltage-dividing circuit is lower than the second voltage, the main CPU control unit sends an early warning signal to a preset cloud.

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