External Battery State Correction for Multi-Brand Battery Packs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional secondary battery management systems face challenges in accurately detecting and managing the state of secondary batteries across different manufacturers, leading to inconsistent charging and discharging control, increased costs due to high-performance processors, and difficulty in unified management of state values.
Innovation Solution
A secondary battery management device that externally manages the state of secondary batteries by requesting voltage and state values from connected units, calculating correction values based on received data, and applying them at designated times, allowing for unified correction and control without relying on individual manufacturer techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If state information is managed independently inside each secondary battery unit by different manufacturers, then each manufacturer can implement their own control methods, but accurate ascertainment of battery state and unified control become difficult
Solution Approach 1:
The patent introduces a management device as an intermediary between multiple secondary battery units from different manufacturers and the external system. This mediator collects state information from all battery units, performs unified management and correction according to a single algorithm, and coordinates charging/discharging control. This resolves the contradiction by maintaining manufacturer independence while achieving unified accurate state management through the intermediary management device.
2Measurement precision
If high-performance processors are used inside secondary battery units for accurate state management, then state detection accuracy improves, but system cost increases
Solution Approach 1:
The patent extracts the complex state management functions and correction algorithms from the individual secondary battery units and relocates them to an external management device. The battery units themselves use simpler processors that only need to collect basic state information (voltage, current, temperature) and transmit it to the management device. This extraction of complex processing functions reduces the computational requirements and cost of processors inside the battery units while maintaining accurate state management through the external device.
3Measurement precision
If state information is collected frequently for real-time monitoring, then state ascertainment accuracy improves, but communication load and system complexity increase
Solution Approach 1:
The patent implements preliminary action by having secondary battery units perform self-diagnosis and preliminary state assessment before transmitting information to the management device. The units only communicate when state changes exceed predetermined thresholds or at scheduled intervals, rather than continuously transmitting all state data. This preliminary filtering and threshold-based communication reduces the frequency and volume of communications while maintaining adequate state monitoring accuracy.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A secondary battery management device is communicably connected to a secondary battery unit including a secondary battery, and manages the secondary battery unit. The secondary battery management device is configured to: request the secondary battery unit to transmit a voltage and a state value of the secondary battery; receive the voltage and the state value of the secondary battery transmitted from the secondary battery unit; calculate a value of correction of the state value on the basis of the voltage and the state value which have been received; and transmit the calculated value of correction to the secondary battery unit in order to apply the calculated value of correction.