Residual life monitoring system for built-in button battery of vehicle combination instrument

Abstract

The invention relates to a residual life monitoring system for a built-in button cell of a vehicle combination instrument, and solves the problems that when the combination instrument is actually used, the time for replacing the button cell after the electricity of the button cell is used up is difficult to judge manually, and the time information displayed by the combination instrument is invalid due to power failure of the built-in button cell of the combination instrument. After the combination instrument is powered on, the built-in button battery does not supply power to the outside, the combination instrument sends on-line information to the service life monitoring display screen, after the combination instrument is powered off, the built-in button battery supplies power to the outside, and the combination instrument does not send on-line information. And the service life monitoring display screen takes the information as input information, processes the information according to time recorded by an internal clock and on the basis of an internal preset total service life time parameter of the built-in button battery of the combination instrument, and then displays the residual service life time of the built-in button battery of the combination instrument to remind personnel to replace the battery in time. According to the invention, workers can conveniently master the information of vehicle parts, and clear guidance information is provided for vehicle maintenance.

Description

Technical Field

[0001] This invention relates to a battery life monitoring system, specifically to a system for monitoring the remaining life of a button battery built into a vehicle's instrument cluster. Background Technology

[0002] Most vehicle instrument clusters have a built-in button battery that serves as an uninterruptible power supply for the internal clock unit. However, the power supply time of this built-in button battery is limited, and in actual use, it is difficult for a person to determine when the battery needs to be replaced. A power outage will cause the time information displayed on the instrument cluster to become invalid. Summary of the Invention

[0003] The purpose of this invention is to develop a system for monitoring the remaining life of a built-in button battery in a vehicle's instrument cluster. When the instrument cluster is powered on, the built-in button battery does not supply power externally, and the instrument cluster sends online information to the life monitoring display screen. After power-off, the built-in button battery supplies power externally, and the instrument cluster does not send online information. The life monitoring display screen uses this as input information and, based on the time recorded by its internal clock and a preset parameter for the total lifespan of the built-in button battery, processes the data and displays the remaining lifespan of the built-in button battery, reminding personnel to replace the battery in a timely manner.

[0004] This invention is achieved through the following technical solutions: A vehicle instrument cluster with a built-in button battery remaining life monitoring system includes an instrument cluster and a life monitoring display screen; The life monitoring display screen has a built-in rechargeable battery, display screen and main control unit. The CAN transceiver and clock unit are integrated into the main control unit. After the vehicle is powered on, the external power supply powers the rechargeable battery. The vehicle's own starter battery charges the rechargeable battery after starting the vehicle, ensuring that the built-in rechargeable battery of the life monitoring display screen will not run out of power during the entire life cycle of the vehicle. The rechargeable battery provides continuous power to the main control unit in real time. Its built-in clock unit can record the time in real time during the vehicle's life cycle and use it as the reference clock time for the life monitoring system. The instrument cluster incorporates a non-rechargeable BR1632 button cell battery, a power switch, a main control unit, and a clock unit. The CAN transceiver is integrated into the main control unit. When the vehicle is powered on, an external power supply is activated, powering the main control unit and switching the power switch to external power to power the clock unit. When the vehicle is powered off, the external power supply is deactivated, the main control unit stops working, and the power switch switches back to the button cell battery to power the clock unit. When the button cell battery is depleted, the built-in clock unit in the instrument cluster stops working when the vehicle is powered off. This results in the instrument cluster displaying the default initial time after power-on, requiring the current time to be reset each time the vehicle is powered on. After the vehicle is powered on, the instrument cluster main controller operates and sends an online message via the CAN transceiver. The life monitoring display receives this message via the CAN transceiver, and its preset remaining lifespan of the instrument cluster's built-in button battery remains unchanged. After the vehicle is powered off, the instrument cluster stops sending online messages. The life monitoring display, unable to receive these messages via the CAN transceiver, then subtracts the preset initial value of the instrument cluster's built-in button battery's basic remaining lifespan based on the time variation of the life monitoring display's reference clock, thus calculating and displaying the remaining lifespan of the instrument cluster's button battery. When the remaining time of the button battery reaches its end of life, it alerts staff to replace it promptly. After replacement, the life monitoring display is manually operated to confirm the battery replacement. Once confirmed, the remaining lifespan of the instrument cluster's button battery displayed on the life monitoring display returns to its initial value, and the remaining lifespan is recalculated.

[0005] This invention uses a life monitoring display screen to show the remaining lifespan of the button battery built into the instrument cluster, promptly reminding staff to replace it. It can also be expanded to display the lifespan of all vehicle components and provide expiration reminders, making it easier for staff to grasp vehicle component information and providing clearer guidance for vehicle maintenance. Attached Figure Description

[0006] Figure 1 Schematic diagram of a button battery remaining life monitoring system; Figure 2 A schematic diagram of the lifespan monitoring display screen interface. Detailed Implementation

[0007] like Figure 1 As shown, the vehicle instrument cluster built-in button battery remaining life monitoring system of the present invention includes two parts: the instrument cluster and the life monitoring display screen.

[0008] The life monitoring display screen integrates a rechargeable battery, a display screen, and a main control unit, with the CAN transceiver and clock unit integrated within the main control unit. The rechargeable battery's power supply can meet the display screen's power needs for up to three months. When the battery level drops below 20%, the display screen enters a low-power mode, and the main control unit cuts off power to the display screen. In low-power mode, the display screen's power consumption drops to less than 10% of normal mode. When the vehicle is powered on, an external power source supplies power to the rechargeable battery. The vehicle's built-in starter battery can automatically recharge itself within three months, while the vehicle maintenance manual requires the battery to be recharged every three months when the vehicle is stationary. This ensures that the built-in rechargeable battery of the life monitoring display screen will not be depleted throughout the vehicle's entire lifespan. Because the main control unit can be continuously powered, its built-in clock unit can record the time in real time throughout the vehicle's lifespan, which can be used as the reference clock for the life monitoring system.

[0009] The instrument cluster incorporates a non-rechargeable BR1632 button cell battery, a power switch, a main control unit, and a clock unit. The CAN transceiver is integrated into the main control unit. The BR1632 button cell battery has a theoretical average range of 200 days. When the vehicle is powered on, an external power source is connected, powering the main control unit and switching the power switch to power the clock unit. When the vehicle is powered off, the external power source is disconnected, powering the main control unit and switching the power switch back to powering the clock unit from the button cell battery. When the button cell battery is depleted, the clock unit in the instrument cluster stops working when the vehicle is powered off. This results in the instrument cluster displaying a default initial time upon power-up, requiring a reset of the current time each time the vehicle is powered on.

[0010] After the vehicle is powered on, the instrument cluster main controller operates and sends an online message via the CAN transceiver, as shown in Table 1. The life monitoring display receives this message via the CAN transceiver, and its preset remaining lifespan of the instrument cluster's built-in button battery remains unchanged. After the vehicle is powered off, the instrument cluster stops sending online messages, and the life monitoring display can no longer receive these messages via the CAN transceiver. The preset base remaining lifespan of the instrument cluster's built-in button battery, initially set to 200*24h, is then subtracted based on the change in the life monitoring display's reference clock time to calculate and display the remaining lifespan of the instrument cluster's button battery. Figure 2 As shown, when the remaining time of the button battery is reduced to 48 hours, indicating that its lifespan has expired, the staff is reminded to replace it in time. After replacement, the life monitoring display screen is manually operated to confirm that the battery has been replaced. After confirming that the battery has been replaced, the remaining lifespan of the button battery displayed on the life monitoring display screen is reset to 4800 hours and the remaining lifespan of the button battery is recalculated.

[0011] Table 1. Online Messages of Combined Instruments This invention has the following characteristics: 1. It can display the remaining lifespan of the built-in button battery in the instrument cluster, promptly reminding staff to replace it.

[0012] 2. The life monitoring display screen can provide a reference clock time throughout the entire life cycle of the vehicle. It can be expanded to display the life time of all life components of the vehicle and provide expiration reminder functions, providing data basis for the regular maintenance of the vehicle.

Claims

1. A device for monitoring the remaining life of a button battery built into a vehicle instrument cluster, characterized in that: Includes combination instruments and life monitoring displays; The life monitoring display screen has a built-in rechargeable battery, display screen and main control unit. The CAN transceiver and clock unit are integrated into the main control unit. After the vehicle is powered on, the external power supply powers the rechargeable battery. The vehicle's own starter battery charges the rechargeable battery after starting the vehicle, ensuring that the built-in rechargeable battery of the life monitoring display screen will not run out of power during the entire life cycle of the vehicle. The rechargeable battery provides continuous power to the main control unit in real time. Its built-in clock unit can record the time in real time during the vehicle's life cycle and use it as the reference clock time for the life monitoring system. The instrument cluster incorporates a non-rechargeable button battery, a power switch, a main control unit, and a clock unit. The CAN transceiver is integrated into the main control unit. When the vehicle is powered on, an external power supply is activated, powering the main control unit and switching the power switch to external power to power the clock unit. When the vehicle is powered off, the external power supply is deactivated, the main control unit stops working, and the power switch switches back to the button battery to power the clock unit. When the button battery is depleted, the built-in clock unit in the instrument cluster stops working when the vehicle is powered off. This results in the instrument cluster displaying the default initial time after power-on, requiring the current time to be reset each time the vehicle is powered on. After the vehicle is powered on, the instrument cluster main controller operates and sends an online message via the CAN transceiver. The life monitoring display receives this message via the CAN transceiver, and its preset remaining lifespan of the instrument cluster's built-in button battery remains unchanged. After the vehicle is powered off, the instrument cluster stops sending online messages. The life monitoring display, unable to receive these messages via the CAN transceiver, then subtracts the preset initial value of the instrument cluster's built-in button battery's basic remaining lifespan based on the time variation of the life monitoring display's reference clock, thus calculating and displaying the remaining lifespan of the instrument cluster's button battery. When the remaining time of the button battery reaches its end of life, it alerts staff to replace it promptly. After replacement, the life monitoring display is manually operated to confirm the battery replacement. Once confirmed, the remaining lifespan of the instrument cluster's button battery displayed on the life monitoring display returns to its initial value, and the remaining lifespan is recalculated.

2. The vehicle instrument cluster built-in button battery remaining life monitoring system according to claim 1, characterized in that: The rechargeable button battery model is BR1632.

3. A method for monitoring the remaining life of a button battery built into a vehicle's instrument cluster, characterized in that: The system includes a combination instrument cluster and a life monitoring display screen. When the combination instrument cluster is powered on, its built-in button battery does not provide external power, and it sends online information to the life monitoring display screen. When powered off, the built-in button battery provides external power, and the combination instrument cluster does not send online information. The life monitoring display screen uses this as input information and, based on the time recorded by its internal clock and the preset total lifespan parameter of the combination instrument's built-in button battery, processes the data and displays the remaining lifespan of the combination instrument's built-in button battery, reminding personnel to replace the battery in a timely manner.

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