Modular Battery System for Electric Two-Wheelers
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Solution Overview
Problem
The existing battery systems for electrically driven vehicles, particularly two-wheelers, face challenges in being space-optimized and flexible due to limited space, requiring a modular design that can adapt to different vehicle types and engines while simplifying electronic control and communication.
Innovation Solution
A battery system is designed with main and secondary modules, where the main module handles electronic control and communication, and secondary modules are connected in series or parallel to optimize voltage and amperage, with each module having its own fuse and Cell Monitoring Unit (CMU) for diagnostics, and a semiconductor contactor for protection, allowing for flexible scaling and reduced complexity in electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single large battery module is used, then the electrical output (voltage and current) can be increased, but the available space is exceeded and the system becomes less flexible for different vehicle configurations
Solution Approach 1:
The battery system is divided into multiple independent battery modules, each with its own housing and electronic components. This segmentation allows the system to achieve high electrical output by connecting multiple modules in series or parallel while maintaining a compact form factor that fits within limited vehicle space, particularly for two-wheelers.
2Reliability
If electronic control components are distributed across all modules, then each module can operate independently, but the device complexity and wiring requirements increase
Solution Approach 1:
Multiple battery modules are electrically connected in series or parallel to form a single integrated battery system with unified voltage and current output. This merging approach reduces overall system complexity compared to fully distributed architectures while maintaining operational reliability through the modular structure.
Solution Approach 2:
The battery system is designed with universal mounting and connection interfaces that allow the same modular components to be configured in different series/parallel arrangements. This multi-functionality enables the system to adapt to various vehicle types and power requirements without changing the fundamental module design.
3Power
If the battery system is designed for high voltage, then the electrical output is increased, but the electrical connection complexity increases
Solution Approach 1:
The high voltage system is segmented into multiple modules operating at lower individual voltages, which are then connected in series to achieve the desired total voltage. This segmentation simplifies the electrical connections within each module compared to designing a single high-voltage module, as each module uses standard low-voltage connection techniques.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a battery system for an electrically driven vehicle which has at least one main module (12), which comprises a plurality of battery cells (18) and which is connected to at least one secondary module (14), which comprises a plurality of battery cells (18). The main module (12) is connected to vehicle electronics (36) directly, and the secondary module (14) is connected to said vehicle electronics only by means of the main module (12).