Battery Module Partition Wall Assembly for Chain Ignition Resistance
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Solution Overview
Problem
Existing battery modules face issues with heat transfer between adjacent cells leading to potential chain ignition, insecure cell fixation, increased weight, and prolonged manufacturing times.
Innovation Solution
A method involving a module case with partitioned receiving portions made of thermoplastic and thermosetting resins, including glass bubbles, and an adhesive member to securely fix battery cells, minimizing heat transfer and reducing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If filler is used to wrap battery cells and fill spaces, then heat transfer between cells is inhibited, but manufacturing complexity increases and cells are not securely fixed
Solution Approach 1:
The invention extracts the heat isolation function from the filler material and transfers it to the partition wall structure. The partition wall is made of heat-resistant material specifically to block heat transfer, while the filler only needs to provide cushioning and space filling, simplifying the overall system design and manufacturing process.
Solution Approach 2:
The module case is segmented into multiple partition walls that divide the internal space into separate receiving portions for individual battery cells. This segmentation provides both structural support and heat isolation barriers between adjacent cells, eliminating the need for complex filler-based heat management systems.
2Object-affected harmful factors
If battery cells are disposed spaced apart using filler, then heat transfer is inhibited, but cells are not securely fixed and empty spaces remain
Solution Approach 1:
The module case is divided into multiple partition walls that create separate receiving portions for each battery cell. These partition walls provide both heat isolation barriers and structural support to securely hold cells in place, eliminating the need for additional fixation mechanisms.
Solution Approach 2:
The partition wall is constructed from composite material combining heat-resistant properties and mechanical strength. This composite structure simultaneously provides thermal isolation to prevent heat transfer and structural rigidity to securely fix battery cells in their receiving portions.
3Object-affected harmful factors
If conventional filler is used between battery cells, then heat transfer is partially inhibited, but manufacturing time increases and defect rate increases
Solution Approach 1:
The invention merges the heat isolation function and the structural support function into a single integrated partition wall structure. This eliminates the need for separate filler materials and reduces the number of manufacturing steps, thereby decreasing manufacturing time and defect rate while maintaining effective heat inhibition.
4Power
If multiple battery cells are connected in series or parallel, then capacity and output are increased, but risk of chain ignition increases
Solution Approach 1:
The module case is segmented into multiple partition walls that create physically separated receiving portions for each battery cell. This segmentation isolates thermal energy within each cell's compartment, preventing heat propagation to adjacent cells even when cells are connected in series or parallel, thereby reducing chain ignition risk while maintaining high capacity and output.
Solution Approach 2:
The partition wall acts as an intermediary barrier between adjacent battery cells. Made of heat-resistant material, it mediates the thermal interaction between cells by blocking heat transfer, thus preventing the propagation of thermal runaway while allowing electrical connections between cells for increased capacity and output.
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
The method enhances cell fixation, reduces manufacturing time, and lowers product defects while maintaining high energy density and impact resistance.
Implementation Method 1
a step of performing heating to a predetermined temperature to fix the battery cell (130)
Implementation Method 2
each of the partition walls (113) includes a lower partition wall (113(a)) extending from the lower plate (111) by a predetermined height and an upper partition wall (113(b)) extending from the lower partition wall (113(a)) by a predetermined height
Data Source
AI summary
A method of manufacturing a battery module may prevent chain ignition. The method may include preparing a module case having a plurality of receiving portions formed therein, each of the receiving portions having a space of a predetermined size; disposing a respective battery cell among a plurality battery cells in each of the receiving portions; and heating the module case with the battery cells to a predetermined temperature to fix the battery cells in the respective receiving portions of the module case. The module case comprises a lower plate, a plurality of side plates, and a plurality of partition walls configured to form the receiving portions, and each of the partition walls comprises a lower partition wall extending from the lower plate by a predetermined height and an upper partition wall extending from the lower partition wall by a predetermined height.