Solid-State Battery Pack Mounting for Vibration Bending Control
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Solution Overview
Problem
Existing battery packs face issues with bending and twisting of battery modules due to vehicle vibrations, which can damage secondary battery cells, and existing solutions either suppress bending on one side while imposing a large load on the cells or fail to address bending in all directions.
Innovation Solution
A battery pack design incorporating self-centering mechanisms with spherical members and plate-shaped components that allow point contact and equalized pressure distribution, along with protrusions to stabilize the stacked body, preventing excessive bending and undulation in all directions without applying a large load on the cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a claw member with inclination is used to suppress bending on the pack side, then bending protruding on the pack side is suppressed, but a large load is applied to the secondary battery cell and bending on the other side cannot be suppressed
Solution Approach 1:
The invention employs a spherical member as the core component of the self-centering mechanism. The spherical shape allows the mechanism to accommodate bending and twisting forces from any direction while maintaining point contact with the battery module, thereby suppressing deformation without applying concentrated loads to the battery cells.
Solution Approach 2:
The self-centering mechanism acts as an intermediary between the battery module and the fixing member. It includes a spherical member with plate-shaped members that can slide on its surface, allowing the mechanism to mediate forces and maintain stable positioning while preventing direct transmission of large loads to the battery cells.
2Stability of the object's composition
If the stacked body is fixed to the fixing member, then bending or undulation can be suppressed, but the battery module cannot accommodate expansion of the solid state battery cells
Solution Approach 1:
The self-centering mechanism incorporates dynamic elements including plate-shaped members that can slide on the spherical member's surface. This dynamic design allows the mechanism to adapt to expansion and contraction of the battery cells while maintaining stable positioning and suppressing bending through point contact.
3Force
If pressure is transmitted from the fixing member to the stacked body, then the battery module is secured, but twisting forces can damage the secondary battery cells
Solution Approach 1:
The spherical member distributes pressure evenly across the contact point with the battery module. This spherical geometry ensures that twisting forces are equalized and transmitted uniformly, preventing concentrated stresses that could damage the secondary battery cells while maintaining secure positioning.
Data Source
AI summary
A battery pack of the present invention includes a stacked body of a plurality of solid state battery cells, end plates connected to both ends of the stacked body in a stacking direction, respectively, first wall members connected to the end plates on the both ends via a first self-centering mechanism, respectively, and a support member configured to support the first wall member, the first self-centering mechanism being constituted by a spherical member and two plate-shaped members slidable on a surface of the spherical member, one of the plate-shaped member being connected to the end plate, and other one of the plate-shaped member being connected to the first wall member.