Battery Assembly Side-Mounted Protection Circuit Layout
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Solution Overview
Problem
The challenge of reducing the size of battery assemblies while maintaining or enhancing the functionality and precision of protective circuit modules in secondary batteries is unresolved due to the increasing size and complexity of these modules.
Innovation Solution
A battery assembly design that positions the protective circuit module on one side surface of the battery cell, with electrode terminals on opposing surfaces, and a connection unit that includes connecting parts to electrically link these terminals to the circuit module, allowing for an expanded area for the module without increasing the overall assembly size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protective circuit module is enhanced with more chips and functionality, then operational precision and functionality are improved, but the size of the battery assembly increases
Solution Approach 1:
The patent positions the protective circuit module on the side surface of the battery cell rather than inside the battery interior, utilizing the external surface area for module placement. This dimensional relocation allows the module to access additional space without increasing the battery's internal volume, enabling enhanced functionality while maintaining compact size.
Solution Approach 2:
The battery assembly is segmented into distinct functional zones: the battery cell interior for energy storage and the side surface for housing the protective circuit module. This segmentation allows independent optimization of each component, enabling the circuit module to be enhanced with additional chips and functionality without compromising the battery cell's compact design.
2Adaptability or versatility
If the protective circuit module size is increased to accommodate more chips, then functionality is improved, but the available space in the battery cell is reduced
Solution Approach 1:
The protective circuit module is relocated from the battery cell interior to the side surface, transitioning from two-dimensional internal space utilization to three-dimensional external surface utilization. This dimensional change provides abundant mounting area for additional chips and components without encroaching on the battery cell's internal volume.
Solution Approach 2:
The connection unit serves as an intermediary component that bridges the battery cell and the protective circuit module. It includes conducting parts that extend from the battery cell terminals to the module on the side surface, enabling electrical connection while allowing the module to be positioned externally where space is not constrained.
3Reliability
If electrode terminals are positioned on opposing surfaces for optimal connection, then electrical connection is improved, but the complexity of the connection unit increases
Solution Approach 1:
The connection unit incorporates flexible conducting parts that can adapt their configuration to connect electrode terminals positioned on opposing surfaces. These conducting parts include bent sections and extending portions that dynamically adjust to bridge the spatial gap between terminals and the circuit module, maintaining reliable electrical connection despite the complex spatial arrangement.
Data Source
AI summary
A battery assembly includes a battery cell that accommodates an electrode assembly and includes a first electrode terminal on a first side surface of the battery cell and a second electrode terminal on a second side surface of the battery cell different from the first side surface, a protective circuit module on the first side surface of the battery cell, and a connection unit electrically connecting the first electrode terminal to the protective circuit module and the second electrode terminal to the protective circuit module.