Vehicular Battery Pack with Separated BMC and Terminal Walls
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Solution Overview
Problem
Current energy storage systems for automobiles face challenges with high production costs and reliability issues due to the use of small cylindrical batteries connected in series and stacked configurations, which result in inefficient energy density and excessive unused space.
Innovation Solution
A battery pack design featuring flat-pouch cells arranged in layers within a parallelepiped-shaped container, where BMC devices form a lateral wall for cooling and monitoring, and safety and power terminals are on an opposite wall, with a longitudinal groove for electrical disconnection, optimizing volume and cooling efficiency while maintaining cell monitoring capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If small cylindrical batteries are connected in series and stacked, then voltage and current values compatible with the inverter are obtained, but a lot of unused space results and energy density is reduced
Solution Approach 1:
The patent changes the cell geometry from cylindrical to flat-pouch configuration, fundamentally altering the physical parameters of the energy storage units. This shape change enables superior space utilization within the battery pack enclosure, eliminating the unused space problems inherent in cylindrical configurations while maintaining the required electrical output parameters through proper series/parallel arrangement of the flat cells
2Ease of manufacture
If cells are stacked without casing, then production costs are reduced, but reliability of the battery pack is not assured
Solution Approach 1:
The patent divides the battery pack into modular sections where each flat-pouch cell is individually housed in its own casing or enclosure. This segmentation approach provides mechanical protection and electrical isolation for each cell, ensuring reliability through proper containment while maintaining cost-effectiveness by using simple, standardized casing designs rather than complex integrated structures
Solution Approach 2:
The patent employs composite construction combining the flat-pouch cell structure with protective casing materials. The casing serves multiple functions: mechanical protection, thermal management interface, and electrical insulation. This composite approach ensures reliability through proper cell containment while keeping production costs reasonable by using practical, manufacturable material combinations
3Temperature
If flat-pouch batteries with wide faces are used, then heat dissipation is improved, but device complexity increases due to BMC devices and monitoring systems
Solution Approach 1:
The patent combines the BMC (Battery Management Control) devices with the structural casing or mounting framework of the battery pack, integrating monitoring functions into the existing physical structure. This merging approach reduces overall device complexity by eliminating separate monitoring housings and consolidating components, while the wide faces of flat-pouch cells continue to provide effective heat dissipation surfaces
Solution Approach 2:
The patent designs the battery pack structure to serve multiple functions simultaneously: the casing provides mechanical protection, thermal management interface, and mounting for BMC devices. The wide faces of flat-pouch cells serve both electrical function and heat dissipation. This multi-functionality approach reduces overall system complexity by making each component perform multiple roles rather than requiring separate dedicated components for each function
4Device complexity
If BMC devices are integrated with cells, then monitoring is simplified, but cooling efficiency is reduced due to occupied space
Solution Approach 1:
The patent extracts the BMC devices from direct integration with individual cells and relocates them to the battery pack structure or casing. This extraction maintains monitoring functionality while freeing up space around the cells for optimal thermal management. The BMC devices are positioned in locations that do not interfere with cooling pathways, air flow, or thermal contact between cells and heat dissipation surfaces
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 design enhances energy density by optimizing the use of space, improves cooling efficiency, and ensures reliable operation by separating BMC devices from cells, allowing for effective monitoring and disconnection of the battery pack while reducing production costs.
Implementation Method 1
said first lateral walls being configured to cool said layers of cells
Implementation Method 2
said first lateral walls being configured to cool said layers of cells
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A vehicular battery pack (BP) comprising a parallelepiped-shaped container, defined by first (S1), second (S2) and third (S3) lateral walls that are mutually perpendicular, wherein cells (C) are arranged in layers (L) one above the other in the container, wherein said third lateral walls are parallel to said layers (L), and wherein relative monitoring and supervision devices (BMC, BMS) of the individual cells are arranged so as to define a first (S2.1) of said second lateral walls (S2), and wherein terminals and safety devices of the battery pack are arranged in a second (S2.2) of said second lateral walls (S2.2), opposite to said first (S2.1) of said second lateral walls (S2).