Battery Pack Authentication via Wired Relay and NFC Matching
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Solution Overview
Problem
In systems where multiple electric vehicles and charging devices share a wireless communication range, there is a risk of controllers incorrectly identifying and controlling the wrong battery packs, compromising safety and security.
Innovation Solution
A method involving wired transmission of identification information from a battery pack to a charging device, which then transmits this information to another battery pack, and subsequent near-field communication authentication by the vehicle to ensure correct identification of the mounted battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used for battery pack identification, then communication convenience is improved, but identification accuracy deteriorates due to multiple vehicles/chargers in range
Solution Approach 1:
The patent introduces wired communication as an intermediary authentication channel between the battery pack and charging device. This wired connection serves as a mediator that establishes a trusted, exclusive communication path to verify identity before allowing wireless communication, thus resolving the conflict between wireless convenience and identification accuracy
Solution Approach 2:
The patent implements preliminary wired communication authentication before wireless communication begins. By performing the identification verification through wired connection in advance, the system ensures accurate battery pack identification before switching to the more convenient wireless mode, preventing misidentification in multi-device environments
2Loss of time
If battery pack replacement mechanism is implemented, then energy supply time is reduced, but system security deteriorates due to potential miscontrol
Solution Approach 1:
The patent implements a feedback mechanism where the battery pack transmits its identification information through wired communication to the charging device, which then provides feedback confirmation. This feedback loop ensures that the correct battery pack is identified and controlled, maintaining system security while enabling rapid replacement operations
Solution Approach 2:
The patent performs preliminary wired authentication of the battery pack identity before the replacement and charging operations begin. This preliminary verification ensures that subsequent rapid replacement operations are performed on the correct device, maintaining security while achieving fast energy supply turnover
Data Source
AI summary
A first power storage pack wiredly transmits identification information retained in the first power storage pack to a charging device when the first power storage pack is detached from an electric movable body. The charging device wiredly transmits the identification information received from the first power storage pack to a second power storage pack. The controller of the second power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The electric movable body collates whether or not the identification information included in the received signal matches the identification information retained in the first power storage pack.