Battery Holder Deformation Section Impact Absorption

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Solution Overview

Problem

Existing battery packs face challenges in impact resistance, as external impacts are not effectively absorbed without using impact-absorbing materials, and ribs directly contacting battery cells can transmit forces to the cells, causing deformation and liquid spills.

Innovation Solution

A battery holder design with deformation sections and space sections between battery cell receiving sections, along with projections on the inner surface of the case, allows for elastic deformation of the holder to absorb external impacts without using impact-absorbing materials, thereby reducing the transmission of force to the battery cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If impact-absorbing material is inserted into the battery pack, then impact resistance is improved, but production cost increases and the number of production processes increases

Engineering Contradiction:

Improveimpact resistanceVSAvoidnumber of production processes

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The impact absorption function is merged into the battery holder structure itself by forming deformation sections as integral parts of the holder. The deformation sections are created during the same injection molding process that forms the battery holder, eliminating the need for separate impact-absorbing materials and additional assembly steps. This combining approach maintains impact resistance while simplifying production.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The battery holder structure provides its own impact absorption capability through the deformation sections that are self-contained within the holder. When impact occurs, the deformation sections elastically deform to absorb the shock, and then return to their original shape, providing automatic impact protection without requiring external components or additional systems.

Inventive Principle:

Principle #25Self-service

2Reliability

If a rib is provided to attenuate impact, then impact resistance is improved, but the rib directly contacts the battery cell and transmits external impact to the cell

Engineering Contradiction:

Improveimpact resistanceVSAvoidimpact transmission to battery cell

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The battery holder is segmented into multiple functional sections: rigid sections that maintain structural integrity, deformation sections that absorb impact through elastic deformation, and space sections that provide clearance. This segmentation allows the holder to attenuate impact while preventing direct force transmission to the battery cells through the rigid sections and properly positioned deformation sections.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The deformation sections act as intermediary elements between the external environment and the battery cells. When impact occurs, these sections deform elastically to mediate the force, absorbing and dissipating energy before it can reach the battery cells, thereby protecting the cells from direct impact transmission.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the battery holder structure is made more rigid to protect battery cells, then impact resistance is improved, but the holder cannot absorb impact energy

Engineering Contradiction:

Improveprotection of battery cellVSAvoidimpact energy absorption

Core Design Contradiction:

StrengthVSLoss of energy

Solution Approach 1:

The battery holder employs local quality variation by having different sections with different mechanical properties. The rigid sections provide structural strength and cell protection, while the deformation sections are designed with lower rigidity to enable elastic deformation and energy absorption. This spatial variation in material properties allows the holder to simultaneously protect cells and absorb impact energy.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The battery holder incorporates dynamic characteristics through the deformation sections that can elastically deform under impact loads and then recover their original shape. This dynamic behavior allows the holder to adapt to impact events by temporarily changing its structural configuration to absorb energy, then returning to its rigid protective state for normal operation.

Inventive Principle:

Principle #15Dynamics

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 the impact resistance of battery packs by dispersing external impacts through elastic deformation, preventing direct transmission to the battery cells and reducing production costs by eliminating the need for impact-absorbing materials.

Implementation Method 1

a deformation section elastically deformed depending on transmission of external impact

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS10195957B2Battery holder, battery receiving case, battery pack, electricity accumulation system, electronic instrument, electric vehicle, and electric power system

Publication Date: 2019.02.05 MURATA MFG CO LTD

AI summary

There is provided a battery holder including: a plurality of battery cell receiving sections for receiving a battery cell. A deformation section elastically deformed depending on transmission of external impact, and a space section for allowing the deformation section to be elastically deformed are formed between a peripheral surface of one battery cell receiving section and a peripheral surface of another battery cell receiving section.