Battery Pack Bus Switching for Same-ID CAN Identification
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Solution Overview
Problem
The challenge in recycling electric vehicle battery packs is identifying and managing multiple battery packs with the same ID, which complicates the recycling process and increases man-hours due to the need for reprogramming or detaching terminating resistance in CAN communication systems.
Innovation Solution
A bus connection system with a control device and a bus connection device that includes a contact switching circuit to sequentially open and close switches, generating identification data to differentiate between battery packs connected to the same bus, allowing the control device to identify and communicate with each pack effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery packs with the same ID are connected to the same bus for recycling, then the quantity of recyclable battery packs increases, but the complexity of identifying and managing individual packs increases
Solution Approach 1:
A bus connection device is introduced as an intermediary between the control device and multiple battery packs. This intermediary generates unique identification data for each battery pack by controlling switch states, enabling the control device to distinguish between battery packs with identical IDs without modifying the packs themselves.
Solution Approach 2:
The bus connection device automatically generates identification data based on the switching states of its internal switches. The system self-manages the identification process without requiring external intervention or modification of the battery packs, reducing manual work and maintaining recycling advantages.
2Measurement precision
If IDs are reprogrammed or terminating resistance is detached to identify battery packs, then individual identification is achieved, but the work man-hours for recycling increase enormously
Solution Approach 1:
The bus connection device serves as an intermediary that handles the identification task without requiring physical modification of battery packs. By using switch state combinations to generate identification data, it eliminates the time-consuming processes of ID reprogramming or terminating resistance detachment while maintaining precise identification capability.
Solution Approach 2:
The patent replaces mechanical/manual operations (detaching terminating resistance or reprogramming IDs) with an automated electronic switching system. The bus connection device uses electronic switches controlled by a contact switching circuit to generate identification data, substituting manual labor with automated electronic control.
3Adaptability or versatility
If multiple battery packs are connected in series and parallel for power storage equipment, then the capacity and versatility of the system increase, but the complexity of managing and operating the battery packs becomes complex
Solution Approach 1:
The system segments the identification and management functions by introducing a dedicated bus connection device that handles identification tasks. This allows the control device to focus on power management while the bus connection device manages packet identification through switch state combinations, dividing the overall system complexity into manageable segments.
Solution Approach 2:
The bus connection device provides multi-functionality by serving both as a connection interface for multiple battery packs and as an identification generator. Through its switching circuit, it enables the same hardware to perform both connection management and unique identification, reducing the need for additional specialized components.
Data Source
AI summary
A bus connection system according to an embodiment of the invention includes a control device that is connected to one end of a first bus and operates as a first node, and a bus connection device that is located between another end of the first bus and a first battery pack operating as a second node and between the other end of the first bus and a second battery pack operating as the second node. The bus connection device includes a first switch located between the first battery pack and the other end of the first bus, a second switch located between the second battery pack and the other end of the first bus, and a contact switching circuit sequentially opening and closing the first switch and the second switch.