Battery Stack Bus Bar Restraint for Cell Expansion Deformation
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Solution Overview
Problem
The existing battery stack configurations are prone to deformation in the top-bottom direction due to the expansion of battery cells, which is not effectively addressed without increasing the number of parts.
Innovation Solution
A power storage device design that incorporates a stack of battery cells with a smoke exhaust duct and a bus bar module, where an elastic body is placed between the bus bar module and the smoke exhaust duct to restrain deformation, using the bus bar module to press the smoke exhaust duct and thereby stabilize the stack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a separate member is provided for restraining the stack from being deformed, then the deformation of the stack can be restrained, but the number of parts increases
Solution Approach 1:
The bus bar module is designed to perform dual functions: electrical connection and mechanical restraint of the stack. By integrating the restraint function into the existing bus bar module structure, the patent eliminates the need for separate restraint members, thereby reducing the number of parts while maintaining effective stack stabilization
Solution Approach 2:
The bus bar module is transformed from a single-function electrical component into a multi-functional element that simultaneously provides electrical connectivity and mechanical support. The frame member and pressing members of the bus bar module are configured to restrain stack deformation while maintaining their primary electrical function
2Stability of the object's composition
If the smoke exhaust duct is pressed by the bus bar module, then the stack deformation is restrained, but additional parts (elastic body) are required
Solution Approach 1:
An elastic body is introduced as an intermediary element between the bus bar module and the smoke exhaust duct. This elastic body serves as a mediator that transmits the pressing force from the bus bar module to the smoke exhaust duct while accommodating dimensional variations and providing cushioning, thereby enabling effective restraint without requiring additional complex mechanisms
Solution Approach 2:
The elastic body undergoes deformation (change in shape and volume) in response to the pressing force from the bus bar module. This parameter change allows the system to accommodate thermal expansion and dimensional variations of the battery cells while maintaining continuous restraint force on the smoke exhaust duct
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 configuration effectively restricts the deformation of the battery stack in the top-bottom direction while minimizing the number of additional parts required, providing stable fixation of the stack through the combined action of the bus bar module and the elastic body.
Implementation Method 1
an elastic body placed on the smoke exhaust duct... The elastic body is placed between the bus bar module and the smoke exhaust duct
Data Source
AI summary
A power storage device includes: a stack formed of a plurality of battery cells arrayed in an X direction (array direction); a smoke exhaust duct placed on the stack and extending in the X direction; a bus bar module including a plurality of bus bars connected to the stack; and a sponge (elastic body) placed on the smoke exhaust duct. The bus bar module covers at least a part of the smoke exhaust duct. The sponge is placed between the bus bar module and the smoke exhaust duct.