Battery Cell Group Retention for Dense Pack Assembly
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Solution Overview
Problem
Existing battery device manufacturing methods require individual tightening and fixing of battery cells to a cooling plate, leading to poor assembly workability and inefficiency in retaining multiple battery cells.
Innovation Solution
A battery device design featuring an outer packaging with two side walls and a retaining mechanism that applies pressure to multiple battery cell groups in parallel, allowing for high-density battery cell arrangement and easy collective retention without individual fixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery cells are individually tightened and fixed to the cooling plate using fixing protrusions, then the battery cells are securely retained without rattling, but the assembly workability deteriorates due to the need to fix each cell separately
Solution Approach 1:
Multiple fixing protrusions are integrated into a single integrated fixing member that spans across multiple battery cells. This merging approach allows one component to perform the fixing function for multiple cells simultaneously, eliminating the need to individually fix each cell while maintaining secure retention and preventing rattling during vehicle operation
Solution Approach 2:
The integrated fixing member serves multiple functions: it acts as a fixing mechanism for multiple battery cells, provides structural support across the cell array, and maintains spacing between cells. This multi-functionality reduces the number of separate components needed and simplifies the assembly process while ensuring reliable retention
2Quantity of substance
If multiple battery cells are laminated in high density within limited space, then the electrical power capacity increases, but the device complexity increases due to the need for precise retention mechanisms
Solution Approach 1:
The battery device is divided into modular units where battery cells are grouped and retained by integrated fixing members. This segmentation approach allows for systematic arrangement of multiple cells in high density while using standardized fixing structures that reduce overall system complexity and facilitate manufacturing
Solution Approach 2:
The integrated fixing members provide multiple functions including retention, spacing, and structural support, which reduces the number of separate components needed in high-density configurations. This multi-functionality simplifies the retention mechanism while enabling efficient packing of multiple battery cells
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
Enables efficient high-density packing and easy retention of multiple battery cells, improving assembly workability and reducing the size of the battery device while maintaining effective heat exchange.
Implementation Method 1
the retaining mechanism may be configured from a resin (for example, the resin 710 described later) which can expand by chemical reaction, and may apply pressure against the plurality of battery cell groups in a direction separating the battery cell groups and pressing towards the two outer side walls which are opposing, by expansion pressure
Implementation Method 2
the two outer side walls may respectively have a temperature-adjusting medium channel (for example, the temperature-adjusting medium channel 36 described later) in which a temperature-adjusting medium capable of exchanging heat with the battery cells via the outer side walls flows
Implementation Method 3
the retaining mechanism may be configured from a resin (for example, the resin 710 described later), and may apply pressure against the plurality of battery cell groups in a direction separating the battery cell groups and pressing towards the two outer side walls which are opposing, by filling pressure of the resin
Data Source
AI summary
A battery device is provided with: an exterior body having two outer side walls; a plurality of battery cell groups that are arranged in parallel between the two outer side walls and that are each composed of a plurality of laminated battery cells; and holding mechanisms that are arranged between the plurality of battery cell groups and that hold the plurality of respective battery cell groups in the exterior body by applying, to the plurality of battery cell groups, a pressing force in a direction in which the battery cell groups are separated from each other and are pressed towards the two opposite outer side walls.