Distributed Battery Management System Architecture
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Solution Overview
Problem
Existing battery management systems face increased computational complexity and maintenance challenges as the number of battery sets grows, particularly when updating information, leading to high labor costs and inefficiencies.
Innovation Solution
A modularized battery management system architecture that distributes measurement and processing of battery information across unit battery modules, reducing the computation load on the master control circuit and simplifying the replacement of battery sets through a current and coulomb measurement circuit and unit battery management circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized management architecture is used to manage all battery sets, then the system can store and process data from each battery set, but the computation load increases significantly as the number of battery sets increases
Solution Approach 1:
The patent divides the centralized battery management system into distributed unit battery modules, where each module independently manages its own battery set. Each unit battery module includes a unit battery management circuit that calculates battery information locally, eliminating the need for the master control circuit to process all data centrally. This segmentation reduces the computation load on the master control circuit while maintaining comprehensive battery management capability.
2Quantity of substance
If the number of battery sets in the battery system increases, then the system capacity increases, but the computation load and maintenance difficulty increase significantly
Solution Approach 1:
By segmenting the battery management system into independent unit battery modules, each managing a specific battery set, the patent enables scalable system expansion. When battery sets are added or replaced, only the corresponding unit battery module needs to be updated or replaced, not the entire system. This significantly reduces maintenance difficulty and labor costs as the number of battery sets increases.
Solution Approach 2:
Each unit battery management circuit autonomously calculates battery information for its associated battery set using locally available data (cell voltage, cell temperature, system current value, and system coulomb value). This self-service capability eliminates the need for centralized processing of each battery set's data, reducing both computation load and maintenance complexity as the system scales.
3Reliability
If centralized processing is used for battery information, then all battery data can be managed, but updating information for changed battery sets requires updating the whole system
Solution Approach 1:
The patent segments the battery management system into independent unit battery modules, each responsible for a specific battery set. When a battery set is replaced or its information changes, only the corresponding unit battery module needs to be updated or replaced, not the entire system. This significantly reduces update time and labor costs while maintaining data consistency through the modular architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances maintenance efficiency, reduces computational burdens, and simplifies the replacement process, thereby lowering costs and improving system reliability by decentralizing data processing and storage within each unit battery module.
Implementation Method 1
generates the system coulomb value by integrating the system current value
Data Source
AI summary
A battery system includes a unit battery module, a current and coulomb measurement circuit and a master control circuit. The unit battery module stores electricity and calculates battery information of the battery set according to a system current value, a system coulomb value, a cell voltage and a cell temperature of the battery set. The current and coulomb measurement circuit is coupled to the unit battery module, generates the system current value according to the current flowing though the battery set, generates the system coulomb value by integrating the system current value, and provides the system current value and the system coulomb value to the unit battery module. The master control circuit is coupled to the unit battery module, receives the battery information from the unit battery module, generates a system battery information according to the battery information and provides the system battery information to an external device.