Battery Module Venting Structure for Bent Flame Discharge
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Solution Overview
Problem
Conventional battery modules face issues with flame discharge that can cause chain ignition and damage adjacent modules due to straight-line propagation of heat, gas, and flame during thermal runaway.
Innovation Solution
The battery module incorporates a venting part with a bent discharge passage design, featuring through holes and cover parts that guide gas and flame discharge in a non-linear manner, using end plates and module frames to disperse and redirect the discharge away from adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a battery module uses a large number of battery cells, then the output power and energy are improved, but the module size and weight increase
Solution Approach 1:
The battery module is divided into multiple battery cell groups, where each group contains a specific number of battery cells (e.g., 5 cells per group). This segmentation allows the module to achieve high power output through parallel connections of multiple groups while maintaining a manageable structure that can be optimized for weight and size.
2Power
If a battery module uses a large number of battery cells, then the output power and energy are improved, but the manufacturing complexity increases
Solution Approach 1:
By dividing the battery module into standardized groups of battery cells with consistent internal connections, the manufacturing process is simplified. Each group can be assembled and tested as a modular unit, reducing the overall complexity of manufacturing large-scale high-power battery modules.
Solution Approach 2:
Multiple battery cell groups are connected in parallel to achieve high power output. This merging approach allows the module to combine the output of multiple standardized groups, simplifying the design and manufacturing process compared to creating a single complex configuration.
3Power
If battery cells are connected in series to increase voltage, then the output power is improved, but the internal resistance increases
Solution Approach 1:
The battery module uses a segmented configuration where battery cells are arranged in series within groups to achieve desired voltage, while multiple groups are connected in parallel. This segmentation allows the module to maintain low internal resistance through parallel connections while achieving high voltage through series connections within each group.
Solution Approach 2:
The patent transitions from a single-dimensional series connection to a two-dimensional configuration combining series connections within groups and parallel connections between groups. This dimensional change allows simultaneous optimization of voltage (through series) and internal resistance (through parallel connections).
Data Source
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AI summary
A battery module according to one embodiment of the present disclosure includes a battery cell stack in which a plurality of battery cells are stacked; a module frame for housing the battery cell stack; and end plates for covering the front and rear surfaces of the battery cell stack, wherein at least one of the module frames or the end plates includes a venting part for discharging gas and flame, and wherein the venting part has a shape that guides the discharge passage of the gas and flame so as to be bent.