Onboard Device Program Rewriting Battery Power Management
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Solution Overview
Problem
During the rewriting of a control program in an onboard device, large data volume communication between a mobile terminal and the device can deplete the vehicle's battery power, potentially leading to insufficient power and unintended interruption of the communication or program execution.
Innovation Solution
The onboard device only performs data communication with the mobile terminal when the vehicle is in a chargeable state, using a power generator to recharge the battery, and includes a notification system to inform the user of the required time for data communication, ensuring power conservation and preventing unintentional stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data communication of a rewriting program is performed between the mobile terminal and the onboard device, then the control program can be updated, but the battery power may be excessively consumed
Solution Approach 1:
The system checks the battery charge level before initiating data communication of the rewriting program. If the battery charge is below the threshold, the communication is prevented in advance, avoiding the problem of power depletion during the update process.
Solution Approach 2:
The power generator acts as an intermediary condition that must be active (providing sufficient power) for the data communication to proceed. The system mediates between the communication need and power availability by requiring the power generator to be in a state that can support the communication process.
2Reliability
If data communication of the rewriting program is performed when battery power is low, then the program can be updated, but the communication or execution may be unintentionally stopped
Solution Approach 1:
The system performs a preliminary check of battery charge levels before allowing data communication to start. By verifying sufficient power availability in advance, the system prevents situations where communication or execution might be interrupted due to power depletion.
Solution Approach 2:
The system cushions against potential power failure by establishing a minimum charge threshold that must be met before communication begins. This beforehand cushioning ensures that even if power consumption increases during communication, the battery will not be depleted mid-process.
3Use of energy by moving object
If the vehicle is always in a chargeable state for data communication, then power depletion is prevented, but the communication opportunities are limited
Solution Approach 1:
The system dynamically adjusts communication availability based on the real-time state of the power generator and battery charge levels. When the power generator is active and charging the battery, communication is permitted; when not, it is restricted. This dynamic approach maximizes communication opportunities while ensuring power safety.
Data Source
AI summary
An onboard device includes a storage unit configured to store a control program for controlling the onboard device and a communication unit configured to perform data communication with a mobile terminal. The communication unit performs data communication of a rewriting program with the mobile terminal when the communication unit has received a rewriting notification signal indicating rewriting of the control program stored from the mobile terminal and the vehicle is in a chargeable state in which the battery is able to be charged by the power generator. The communication unit does not perform data communication of the rewriting program with the mobile terminal when the vehicle is not in the chargeable state.