Battery Pack NFC Authentication for Accurate Charger Pairing
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Solution Overview
Problem
In systems where replaceable battery packs are used in electric vehicles and charging devices, there is a risk of incorrect identification and control of battery packs due to multiple vehicles and chargers within communication range, leading to safety and security issues in the charging process.
Innovation Solution
A method involving wired transmission of identification information from a charging device to a battery pack controller, followed by near-field communication to authenticate the pack's identity, ensuring correct pairing and preventing erroneous control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If wireless communication is used to control battery packs, then convenience and automation of charging are improved, but reliability and security deteriorate due to potential misidentification of battery packs
Solution Approach 1:
The patent introduces an intermediary authentication mechanism using near-field communication (NFC) tags and readers as a mediator between the wireless communication system and battery packs. The NFC tag stores unique identification information that must be read and verified before charging begins, ensuring that the correct battery pack is selected even when multiple packs are within wireless communication range. This intermediary step prevents misidentification while maintaining automated charging control.
Solution Approach 2:
The system performs preliminary authentication actions before the actual charging process begins. The NFC reader reads the identification information from the NFC tag on the battery pack, and the control device verifies this information against the target battery pack identification before initiating wireless charging. This preliminary verification ensures reliability is established before automation executes the charging operation.
2Adaptability or versatility
If multiple battery packs are within communication range, then versatility and adaptability of the charging system are improved, but security and safety worsen due to risk of erroneous control
Solution Approach 1:
The NFC authentication system serves as an intermediary verification layer that distinguishes between multiple battery packs within communication range. Each battery pack has a unique NFC tag with identification information, and the control device must successfully read and verify this information before charging. This prevents erroneous control of wrong battery packs while maintaining the ability to charge multiple packs selectively.
Solution Approach 2:
The system implements feedback through the NFC authentication process where the control device receives confirmation of battery pack identity through the NFC reader. This feedback loop ensures that the control device has verified it is charging the intended battery pack before proceeding, reducing the risk of harmful erroneous control while maintaining versatility.
3Device complexity
If wireless communication alone is used for battery pack identification, then device complexity is reduced, but measurement precision and identification accuracy deteriorate
Solution Approach 1:
The patent merges two communication technologies: wireless communication (for control signals and power transfer) and near-field communication (for identification verification). This combination maintains relatively simple device structure while significantly improving identification precision. The NFC tag and reader add minimal complexity but provide reliable positive identification of battery packs.
Solution Approach 2:
The NFC authentication system acts as an intermediary verification mechanism that complements wireless communication. While wireless communication handles the main control functions, the NFC intermediary provides precise identification verification, achieving high measurement precision without substantially increasing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures accurate identification and control of mounted battery packs, enhancing the safety and security of the charging system by preventing misidentification and unauthorized use.
Implementation Method 1
transmitting via near-field communication, by the controller of the power storage pack, a signal including the identification information received from the charging device
Data Source
AI summary
A charging device wiredly transmits identification information to a power storage pack after the power storage pack is mounted. The power storage pack transmits via near-field communication a signal including the identification information received from the charging device. The charging device collates whether or not the identification information included in the received signal matches the identification information wiredly transmitted.