Power Storage Pack Authentication via Current Pattern Resistance Check
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Solution Overview
Problem
The existing systems for electric moving bodies and charging devices face challenges in securely and efficiently measuring contact resistance after a power storage pack is mounted, which can lead to safety and security issues due to potential misidentification of battery packs.
Innovation Solution
A power storage pack with a controller that performs authentication communication using a current pattern flowing through a power line, allowing for the measurement of contact resistance based on voltage and current values during the authentication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless communication is used for authentication between battery pack and vehicle/charger, then the number of terminals is reduced, but safety and security cannot be secured due to potential misidentification of battery packs
Solution Approach 1:
The patent introduces a current pattern as an intermediary authentication mechanism. During wireless communication, a specific current pattern flows through the power line between the vehicle/charger and battery pack. This current pattern serves as a physical mediator that confirms the actual connection, preventing misidentification even when multiple vehicles or chargers are within wireless communication range.
2Reliability
If authentication is performed using current pattern through power line, then safety and security are improved, but measurement of contact resistance is not efficiently performed
Solution Approach 1:
The patent merges the authentication process with the contact resistance measurement process. The same current pattern that flows through the power line for authentication is simultaneously used to measure contact resistance. By combining these two functions into a single process, the system achieves both security verification and electrical connection assessment without requiring separate measurement steps, thereby improving efficiency.
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 solution enables efficient measurement of contact resistance during the authentication process, improving safety and security by preventing erroneous control of battery packs and reducing the risk of mechanical connection failures.
Implementation Method 1
a controller of the power storage pack measures contact resistance between the power storage pack and the electric moving body based on voltage of the power line on the power storage pack side, voltage of the power line on the electric moving body side received from a controller of the electric moving body, and current at the time of performing communication for authentication
Data Source
AI summary
Controller of power storage pack performs communication for authentication with controller of an electric moving body according to the pattern of a current flowing through a power line in a state where power storage pack is mounted to electric moving body. Controller of power storage pack measures contact resistance between power storage pack and the electric moving body based on voltage of the power line on power storage pack side, voltage of the power line on the electric moving body side received from controller of the electric moving body, and current when communication for authentication is performed according to the pattern of a current flowing through the power line.