Modular Battery Maintenance Stack for Safe EV Pack Discharge
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Solution Overview
Problem
Existing battery maintenance systems for electric vehicles face challenges in efficiently and safely discharging battery packs, particularly after accidents, due to varying battery configurations and the need for precise electrical connections amidst potential damage, which complicates access and discharging procedures.
Innovation Solution
A modular battery maintenance system comprising separable units with integrated power supply, voltage input-output circuitry, and an operator interface, allowing for flexible configuration and safe operation, including the ability to interface with vehicle and battery pack databuses to manage high voltages and control charging/discharging processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional battery maintenance systems are used, then battery testing and maintenance can be performed, but the system lacks flexibility in configuration and cannot efficiently handle varying battery pack arrangements in different vehicle types
Solution Approach 1:
The battery maintenance system is divided into multiple separable units, each capable of performing specific maintenance functions. These modular units can be independently configured and connected to accommodate different battery pack arrangements in various vehicle types, providing configuration flexibility without increasing overall system complexity
Solution Approach 2:
The maintenance system is designed with universal interfaces and standardized connection mechanisms that allow the same modular units to work with different battery pack configurations across various vehicle types (electric, hybrid, traditional), enabling one system to serve multiple functions and applications
2Productivity
If battery discharge operations are performed quickly, then maintenance efficiency is improved, but safety risks increase due to potential damage and high voltage management challenges
Solution Approach 1:
Before performing rapid battery discharge operations, the system performs preliminary assessments and preparations, including detecting battery pack integrity, verifying connection stability, and establishing appropriate discharge parameters. This preliminary action ensures that quick discharge operations can proceed safely without compromising operational safety
Solution Approach 2:
The maintenance system incorporates real-time monitoring and feedback mechanisms that continuously track battery voltage, current, and system status during discharge operations. This feedback allows the system to dynamically adjust discharge rates and terminate operations if safety thresholds are approached, enabling fast maintenance while maintaining operational safety
3Ease of operation
If standardized physical connectors are used for modular units, then ease of assembly and configuration is improved, but manufacturing precision requirements increase to ensure proper alignment and connection
Solution Approach 1:
The physical connectors are designed with asymmetric features including positioning pins, keyed interfaces, and non-symmetric contact arrangements. This asymmetry provides self-aligning characteristics that guide modular units into proper connection positions during assembly, reducing the need for high manufacturing precision while maintaining ease of assembly
Solution Approach 2:
The connector design incorporates nested structural elements where outer housing components provideç²— positioning and alignment, while inner contact elements provide fine alignment and electrical connection. This nested approach distributes precision requirements across multiple levels, making assembly easier while maintaining connection reliability
Data Source
AI summary
A battery maintenance system includes a first unit comprising a battery maintenance device, a second unit comprising a battery maintenance device, a third unit having a power supply and voltage input-output circuitry configured to couple to a battery and a fourth unit having an operator interface. Each of the first, second, third and fourth units are encased in a housing and include physical connectors that allow the first unit, the second unit, the third unit and the fourth unit to be coupled together in a stacked configuration in a user selectable order.