Battery Module Segmented Degassing and Shared End Plates
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Solution Overview
Problem
High-power battery modules face safety challenges due to the generation of gas during electrochemical reactions, which can lead to pressure buildup and potential damage, as existing designs lack efficient gas management and separation mechanisms.
Innovation Solution
A battery module design that separates degassing regions for each sub-module, controlled by a controller, with protrusion holes, a pipe-type degassing member, and a connecting member, allowing for controlled gas discharge and minimizing material usage by mounting end plates only on the outermost sub-modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If gas discharge passages are provided in the battery module, then gas generated from battery cells can be efficiently processed, but pressure buildup and potential damage may still occur due to lack of separation mechanisms
Solution Approach 1:
The battery module is divided into multiple sub-module regions, each with its own dedicated degassing region and gas discharge passage. This segmentation allows gas from each sub-module to be independently managed and discharged, preventing pressure buildup that could affect the entire module. The controller is also divided into multiple control units, each managing a specific sub-module, enabling localized monitoring and response to gas generation issues.
2Strength
If end plates are provided on all sub-modules, then structural support is improved, but material usage and costs increase
Solution Approach 1:
Adjacent sub-modules share common end plates, eliminating the need for separate end plates on each sub-module. This merging approach maintains structural support across multiple sub-modules while significantly reducing the total number of end plates required. The shared end plates are positioned at the outer boundaries of groups of sub-modules, providing structural integrity without redundant material usage.
3Device complexity
If a single controller manages all battery cells, then device complexity is reduced, but the ability to manage gas discharge and safety is compromised
Solution Approach 1:
The controller is divided into multiple control units, with each control unit managing a specific sub-module including its battery cells and degassing region. This segmentation enables localized control and monitoring of gas generation and discharge for each sub-module, improving safety and reliability. Each control unit can independently respond to gas generation issues in its designated sub-module without affecting the entire battery module.
4Device complexity
If degassing regions are not separated, then device complexity is reduced, but pressure buildup and safety risks increase
Solution Approach 1:
The battery module is divided into multiple sub-modules, each with its own dedicated degassing region. This segmentation allows gas generated in each sub-module to be collected and discharged independently, preventing pressure buildup from affecting other sub-modules. The separated degassing regions are connected to the external environment through dedicated gas discharge passages, ensuring that pressure issues are contained and managed locally.
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 safety by ensuring controlled gas discharge for each sub-module, reducing the risk of pressure buildup and material costs, while maintaining efficient gas management and stability.
Implementation Method 1
Each battery cell typically includes an electrode assembly formed with a cathode plate and an anode plate, and an electrolyte, and may generate energy by an electrochemical reaction between the plates and the electrolyte.
Implementation Method 2
the top plate is further provided with protrusion holes discharging the gas generated from the battery cell
Data Source
AI summary
A battery module including a plurality of sub battery modules stacked together, each sub battery module comprising a plurality of battery cells, each of the battery cells having terminals and a vent portion on a first side of the sub battery modules; a pair of end plates, one of the ends plates located at each end of the battery module; a top plate on the first side of the sub battery modules; and a controller configured to control the battery cells for each of the sub battery modules, wherein each of the sub battery modules has an individual degassing region controlled by the controller.