Mixed Battery Cluster Control for Safe Parallel Energy Exchange
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Solution Overview
Problem
The mixing of different brands and models of battery clusters, as well as new and old batteries, leads to imbalanced charging and discharging due to varying internal resistances, resulting in reduced performance, resource waste, and safety risks such as explosions and leakage.
Innovation Solution
A battery mix system that controls electrical energy exchange by determining target battery clusters based on demand and capability, establishing connections for efficient energy exchange, and prioritizing power-type batteries in insufficient scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different brands and models of battery clusters are mixed in use, then resource utilization and system flexibility improve, but safety and reliability deteriorate due to uncontrollable current magnitude and internal resistance variations
Solution Approach 1:
The system segments the battery clusters into different groups (first battery cluster and second battery cluster) with distinct connection configurations. The first battery cluster is connected in a first configuration while the second battery cluster is connected in a second configuration, allowing each segment to operate within its optimal current range and contributing differently to the wheel motor power output.
Solution Approach 2:
The system dynamically adjusts the connection configurations of battery clusters based on real-time operating conditions. The control device can switch between series and parallel connections for different battery clusters depending on the power demand, state of charge, and temperature conditions, enabling adaptive optimization of safety and performance.
2Productivity
If different brands and models of battery clusters are mixed in use, then resource utilization improves, but performance balance deteriorates due to internal resistance variations causing bias current
Solution Approach 1:
The system segments battery clusters with different internal resistance characteristics into separate groups. The first battery cluster with higher internal resistance is connected in series configuration to limit current, while the second battery cluster with lower internal resistance is connected in parallel configuration to provide higher current capacity, thereby balancing the overall system performance.
Solution Approach 2:
Different connection configurations are applied to different battery clusters based on their specific characteristics. High-capacity battery clusters are connected in parallel to provide high current, while low-capacity or high-resistance battery clusters are connected in series to limit current and prevent overheating, optimizing each cluster's contribution according to its local properties.
3Quantity of substance
If high-capacity battery clusters are mixed with low-capacity battery clusters, then system energy capacity improves, but maximum potential utilization deteriorates due to bias current from low-capacity batteries
Solution Approach 1:
The control device dynamically switches between different connection configurations based on power demand. During high-power demand periods, high-capacity battery clusters are connected in parallel to maximize current output. During low-power or charging periods, they are connected in series to optimize voltage and prevent overcurrent conditions that would limit their potential.
Solution Approach 2:
The system separates high-capacity and low-capacity battery clusters into different groups with different connection configurations. High-capacity clusters are dedicated to parallel connections for high current output, while low-capacity clusters are assigned to series connections for voltage contribution, allowing each group to operate at its maximum potential without being constrained by the other.
4Manufacturing precision
If a single type of long-life batteries or high-rate charge/discharge batteries is used throughout the system, then battery performance consistency improves, but resource waste occurs due to inability to mix different battery types
Solution Approach 1:
The system segments battery clusters into different functional groups based on their characteristics. Long-life batteries optimized for energy storage are placed in series configurations for voltage contribution, while high-rate charge/discharge batteries optimized for power delivery are placed in parallel configurations for current contribution. This segmentation allows each battery type to be used in its optimal application.
Solution Approach 2:
The battery system is designed to accommodate multiple types of battery clusters with different characteristics and functions. The control device can manage and switch between different battery types (lithium iron phosphate, nickel cobalt manganese, lithium titanate, etc.) based on operating conditions, making the system universally adaptable to various battery technologies and their specific strengths.
Data Source
AI summary
Provided are a battery mix system, a control method and a control device thereof, and a storage medium. The battery mix system includes N battery clusters, the N battery clusters being connected in parallel, N being an integer greater than 1. The method includes: obtaining an electric energy exchange capability of the N battery clusters after receiving an electric energy exchange demand sent by external electric energy exchange terminal; determining one or more target battery clusters from the N battery clusters according to the electric energy exchange demand and the electric energy exchange capability of the N battery clusters; and establishing electrical connections between the one or more target battery clusters and the external electrical energy exchange terminal for electrical energy exchange with the external electrical energy exchange terminal.