Shared PCM Battery Pack Assembly for Compact Cell Protection
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Solution Overview
Problem
Conventional battery pack designs face challenges in space-saving due to the need for separate protection circuit modules (PCMs) for each battery cell, which reduces available space for additional battery capacity or PCM components.
Innovation Solution
The implementation of a battery pack design where two batteries share a single PCM, with the electrodes connected to a common protection circuit board (PCB), allowing for a more compact protection circuit packaging and freeing up space for additional battery capacity or a slimmer design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PCMs are used for each battery cell, then battery safety and protection functionality are ensured, but battery pack volume increases and space efficiency decreases
Solution Approach 1:
The patent combines multiple separate PCMs into a single shared PCM that serves multiple battery cells. The protection circuit board integrates protection functionality for multiple cells, eliminating the need for individual PCMs for each cell. This merging approach maintains comprehensive protection coverage while significantly reducing the overall volume occupied by protection circuits in the battery pack.
Solution Approach 2:
The shared PCM is designed with universal functionality to protect multiple different battery cells simultaneously. The protection circuit board incorporates multiple sets of protection circuits that can monitor and control different cells, making a single PCM unit serve multiple purposes and multiple cells, thereby improving space utilization while ensuring reliable protection.
2Reliability
If separate PCMs are used for each battery cell, then individual cell protection is achieved, but available space for additional battery capacity is reduced
Solution Approach 1:
By merging individual cell protection circuits into a single shared PCM, the space previously occupied by multiple separate PCMs is now available for additional battery capacity. The integrated protection circuit board provides the same level of individual cell protection while freeing up valuable space that can be utilized for adding more battery cells or increasing overall battery capacity.
3Volume of stationary object
If compact PCM packaging is implemented, then battery pack space is optimized, but PCM component placement space may be constrained
Solution Approach 1:
The shared PCM utilizes three-dimensional space efficiently by stacking battery cells vertically and positioning the protection circuit board to serve multiple cells in a compact arrangement. This dimensional optimization allows adequate component placement area on the protection circuit board while maintaining a compact overall battery pack volume, resolving the conflict between compact packaging and component placement space.
Data Source
AI summary
A battery pack comprises a pair of physically separate battery cells share a single protection circuit module (PCM). Each further saw comprises a respective pair of electrodes, with both pairs of electrodes being connected to a single, common protection circuit board (PCB) of the PCM. The common PCM may be located in a spacing between adjacent ends of the batteries such that a widthwise dimension of the PCB has an upright orientation between the two batteries.