Battery Module Busbar Frame Venting for Chain Ignition Prevention
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Solution Overview
Problem
Conventional battery modules face issues with high-temperature heat, gas, and flame discharge during ignition, which can damage adjacent modules and cause chain ignition in battery packs due to inadequate venting and dispersion mechanisms.
Innovation Solution
A battery module design featuring a first busbar frame with a venting-preventing part between electrode leads, a cushioning member, and a second end plate with a venting hole to direct and suppress the discharge of high-temperature heat, gas, and flame, minimizing damage to adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional battery modules are arranged in a battery pack with end plates facing each other, then the battery pack can achieve high capacity and power output, but high-temperature heat, gas, and flame discharged from one module can damage adjacent modules and cause chain ignition
Solution Approach 1:
A partition wall is introduced as an intermediary structure between adjacent battery modules. This partition wall includes a venting hole that allows controlled passage of heat, gas, and flame while preventing direct contact between modules. The partition wall acts as a mediator that manages the harmful discharge effects without compromising the high power output capability of the battery pack configuration
Solution Approach 2:
The battery pack is segmented into separate modules with partition walls between them. This segmentation isolates the harmful discharge effects to specific modules while allowing the overall system to maintain high capacity and power output through the modular arrangement. Each module can be independently managed and protected
2Ease of manufacture
If battery modules are configured with standard end plate designs, then manufacturing is simple and cost-effective, but the end plates cannot effectively disperse high-temperature heat and flame during ignition events
Solution Approach 1:
The end plate design incorporates local quality modifications by adding partition walls with venting holes at specific locations. These localized structural changes enhance the heat and flame dispersal capability without requiring complete redesign of the entire end plate, maintaining manufacturing simplicity while improving safety performance
3Quantity of substance
If battery cells are stacked in a compact arrangement, then the battery module achieves high energy density, but heat generated during charging and discharging cannot be effectively dissipated
Solution Approach 1:
The partition wall structure with venting holes extracts and removes heat, gas, and flame from the compact battery cell arrangement. This allows the high energy density configuration to be maintained while providing a pathway for thermal energy to be taken out and dissipated, preventing excessive temperature buildup
Data Source
AI summary
A battery module including: a battery cell stack including a plurality of battery cells and electrode leads protruding in mutually opposite directions; a housing that houses the battery cell stack; and a first busbar frame arranged on one surface of the battery cell stack in a protruding direction of the electrode leads. The first busbar frame includes a first venting-preventing part protruding in a direction between the electrode leads of adjacent battery cells.