Removable EV Battery Anti-Theft System
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Solution Overview
Problem
Existing antitheft systems for removable batteries in electric vehicles are inadequate in preventing theft, as they do not effectively restrict usage outside designated time periods or require user authentication.
Innovation Solution
A vehicular removable battery system that includes a time acquirer, time period storage, and an electric power supply controller, which only allows power supply during specified time periods and requires matching dedicated codes for activation, preventing unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a removable battery is adopted in an electric vehicle to enable continuous travel through battery replacement, then the productivity and flexibility of the vehicle are improved, but the battery becomes vulnerable to theft
Solution Approach 1:
The system performs preliminary authentication actions before allowing battery operation. The time acquirer obtains current time, compares it with the stored time period in advance, and the electric power supply controller checks authentication results before enabling power supply. This preliminary verification prevents unauthorized use before it can occur.
Solution Approach 2:
The patent introduces an intermediary authentication mechanism between the battery and the vehicle system. The time period storage and electric power supply controller act as intermediaries that verify temporal authorization and authentication codes, allowing only properly authenticated batteries to supply power to the vehicle.
2Reliability
If an antitheft device is built into a permanently mounted battery, then vehicle security is improved, but portable replacement batteries used for swapping remain unprotected
Solution Approach 1:
The authentication system is designed to be universal and work with any removable battery that contains the time period storage and time acquirer components. This multi-functional approach protects both permanently mounted batteries and portable replacement batteries, allowing the same security mechanism to serve multiple battery types and mounting configurations.
Solution Approach 2:
The battery unit performs self-authentication using its own time acquirer and time period storage components. The battery independently checks whether the current time falls within its authorized time period and verifies authentication codes, without requiring external security hardware in the vehicle. This self-service approach enables portable batteries to protect themselves.
3Reliability
If the electric power supply controller continuously monitors authentication status to prevent theft, then security is improved, but the device complexity and energy consumption increase
Solution Approach 1:
Instead of continuous monitoring, the system performs periodic authentication checks at specific intervals - when the battery is first connected and when the vehicle is activated. The time acquirer periodically obtains the current time and compares it with the stored time period, and the electric power supply controller periodically verifies authentication status. This periodic approach maintains security while reducing complexity and energy consumption compared to continuous monitoring.
Data Source
AI summary
A vehicular removable battery removably mountable in an electric vehicle includes a time acquirer configured to acquire a current time, a time period storage storing a time period in which electric power is supplied, and an electric power supply controller configured to control the supply of the electric power stored in an electric power storage to the electric vehicle. After the electric power supply controller detects that an activation instruction of the electric vehicle has been issued, the electric power supply controller is configured to enable the supply of the stored electric power to the electric vehicle in a case where the acquired current time is included in the stored time period. The electric power supply controller is configured to prohibit the supply of the electric power to the electric vehicle in a case where the acquired current time is not included in the stored time period.