Cylindrical Battery Pack With Insulative Mounting Member
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Solution Overview
Problem
Conventional cylindrical battery cells are not optimally suited for semi-middle-sized devices, requiring a modified structure to provide sufficient power and capacity, and existing battery packs for these devices often compromise on energy density due to the use of prismatic or pouch-shaped batteries.
Innovation Solution
A secondary battery pack design featuring a cylindrical battery cell with an insulative mounting member and a protection circuit module (PCM) assembly, where the cathode and anode terminals are electrically connected to external terminals via connecting members, allowing for a simple assembly and secure power supply without modifying the cylindrical battery cell, using a metal container for mechanical strength and ensuring safety through the PCM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional cylindrical battery cells are used for semi-middle-sized devices, then the battery structure can be simple and manufacturing can be easy, but the power and capacity are insufficient for these devices
Solution Approach 1:
The patent divides the battery system into modular components: multiple cylindrical battery cells are segmented and arranged in specific configurations (series/parallel connections) to achieve the required power and capacity levels for semi-middle-sized devices, while maintaining the simplicity of individual cylindrical cell structures
Solution Approach 2:
The patent creates a universal battery pack structure that can accommodate different numbers and arrangements of cylindrical battery cells, allowing the same basic design to serve multiple device power requirements through flexible configuration of the battery cells in series and parallel connections
2Power
If prismatic or pouch-shaped batteries are used for semi-middle-sized devices, then the power and capacity requirements can be met, but the energy density is reduced
Solution Approach 1:
The patent changes the physical form parameter of the battery from prismatic or pouch-shaped to cylindrical configuration, which inherently provides higher energy density. By maintaining the cylindrical shape and optimizing the arrangement and connection parameters of multiple cells, the system achieves both high power output and high energy density simultaneously
3Power
If cylindrical battery cells are modified to suit semi-middle-sized devices, then the power and capacity can be increased, but the structure becomes complex and manufacturing becomes difficult
Solution Approach 1:
Rather than modifying the cylindrical battery cell structure itself, the patent segments the system into multiple standard cylindrical cells that are arranged and connected in modular configurations. This maintains the simplicity of individual cell structures while achieving the required power levels through systematic arrangement
Solution Approach 2:
The patent combines multiple standard cylindrical battery cells into a unified battery pack system with integrated control circuits and connection mechanisms. By merging multiple simple units into a coordinated system, the patent achieves high power output without modifying the fundamental simplicity of the cylindrical cell design
Data Source
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AI summary
Disclosed herein is a secondary battery pack including a cylindrical battery cell having an electrode assembly of a cathode/separator/anode structure mounted in a battery case together with an electrolyte in a sealed state, an insulative mounting member having an opening, through which a cathode terminal of the battery cell is exposed upward, the insulative mounting member being configured to have a structure in which a protection circuit module (PCM) assembly is disposed at the top of the insulative mounting member, the insulative mounting member being mounted to the top of the battery cell, a PCM assembly including a PCM having an external input and output terminal formed at the top thereof and connecting members coupled to the bottom of the PCM, the connecting members being connected to a protection circuit of the PCM, and an insulative cap coupled to the top of the battery cell so that the insulative cap surrounds the PCM assembly in a state in which the external input and output terminal is exposed, wherein the cathode terminal and an anode terminal of the battery cell are electrically connected to external input and output terminals via the connecting members through the PCM in a state in which the insulative mounting member and the PCM assembly are disposed on the battery cell.