EV Battery Pack Maintenance Interface for Safe High-Voltage Access
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Solution Overview
Problem
The maintenance of electric vehicle battery packs is challenging due to varying configurations, high voltages, and safety concerns, especially after accidents, where traditional methods fail to safely discharge or access the battery packs.
Innovation Solution
A battery pack maintenance device that interfaces with the vehicle and battery pack databuses, uses controllable loads and charging circuitry to safely discharge or charge the battery packs, and includes junction boxes for standardized connections, capable of operating with high voltages and isolating logic and control circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maintenance methods are used on battery packs, then the device complexity is low, but the reliability and safety are insufficient due to high voltage and varying configurations
Solution Approach 1:
The patent introduces a maintenance device as an intermediary between the technician and the battery pack. This device includes a junction box that interfaces with the battery pack's communication bus and control circuitry, enabling safe discharging, charging, and diagnostics without direct exposure to high voltage components. The intermediary nature of this device isolates the operator from electrical hazards while maintaining system reliability.
Solution Approach 2:
The maintenance device is designed with multi-functionality to handle various battery pack configurations and maintenance tasks. It can discharge battery packs to safe voltage levels, charge them, perform diagnostics, and communicate with different vehicle systems through standardized junction box interfaces. This universal approach ensures safety across diverse battery systems without requiring custom solutions for each configuration.
2Loss of time
If battery packs are discharged quickly for safe transport, then the loss of time is reduced, but the reliability may be compromised due to safety risks
Solution Approach 1:
The maintenance device dynamically adjusts the discharging rate based on real-time monitoring of battery voltage, current, and temperature parameters. The system can accelerate discharge when safe conditions are met while automatically reducing rate or pausing when safety thresholds are approached. This dynamic control enables quick discharge for transport readiness while maintaining safety through continuous parameter monitoring and adaptive response.
Solution Approach 2:
The device incorporates feedback mechanisms that continuously monitor battery pack parameters during discharge operations. Communication circuitry exchanges data with the battery management system, providing real-time feedback on voltage levels, current flow, and thermal conditions. This feedback loop allows the system to optimize discharge speed while ensuring safety constraints are never violated, balancing speed and reliability.
3Ease of operation
If standardized connections are implemented for battery pack maintenance, then the ease of operation is improved, but the adaptability to varying battery configurations may be reduced
Solution Approach 1:
The junction box incorporates universal communication interfaces and control circuitry that can adapt to different battery pack configurations through standardized protocols. The device recognizes various battery types and adjusts its operation accordingly, maintaining ease of use through a consistent user interface while handling diverse technical specifications. This universal design enables technicians to operate with any battery pack using the same standardized connection methods.
Solution Approach 2:
The maintenance device adapts to varying battery configurations by dynamically adjusting operational parameters such as voltage thresholds, current limits, and communication protocols. The system automatically detects battery pack characteristics and modifies its behavior to match the specific configuration, allowing standardized connections to work across different battery types without sacrificing adaptability to their unique requirements.
Data Source
AI summary
The present invention includes a battery pack maintenance device for performing maintenance on battery packs of hybrid and/or electrical vehicles (referred herein generally as electric vehicles). In various embodiments, the device includes one or more loads for connecting to a battery pack for use in discharging the battery pack, and/or charging circuitry for use in charging the battery pack. Optional input/output circuitry can be provided for communicating with circuitry of in the battery pack and/or circuitry of the vehicle.