Battery Mounting Structure for Side-Impact and Vibration Isolation

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Solution Overview

Problem

Existing vehicle structures with batteries are prone to impact loads and abnormal noise due to side collisions and vibrations, which can be exacerbated by increasing the rigidity of battery fixation portions, leading to increased weight and noise.

Innovation Solution

A vehicle structure with a battery placement portion surrounded by a front cross member, rear cross member, and vehicle body side frame, incorporating a battery fixation portion and concave portion to prevent impact loads and vibrations, using a reinforcement patch to enhance rigidity without increasing weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the rigidity of the battery fixation portion is increased to prevent vibration and abnormal noise, then the stability of the battery placement portion is improved, but the weight of the fixation portion increases

Engineering Contradiction:

Improvestability of battery placement portionVSAvoidweight of fixation portion

Core Design Contradiction:

Stability of the object's compositionVSWeight of moving object

Solution Approach 1:

The patent applies composite materials by combining the battery fixation portion with a reinforcement patch made of different material properties. The reinforcement patch is attached to the battery fixation portion to enhance its rigidity and strength without significantly increasing weight, resolving the contradiction between stability and weight.

Inventive Principle:

Principle #40Composite materials

2Reliability

If the battery is fastened and fixed to the front cross member and rear cross member, then the battery is protected from side collision impact loads, but the impact load is transmitted from the cross members to the battery

Engineering Contradiction:

Improveprotection from side collisionVSAvoidimpact load transmission

Core Design Contradiction:

ReliabilityVSForce

Solution Approach 1:

The patent introduces the battery fixation portion as an intermediary element between the battery and the cross members. This fixation portion absorbs and distributes the impact load, preventing direct transmission of force from the cross members to the battery while maintaining protection during side collisions.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If the battery is fastened and fixed only to the front cross member and rear cross member, then the structure is simple, but the battery is subjected to large loads from side collisions, torsion, and road noise

Engineering Contradiction:

Improvesimplicity of fixation structureVSAvoidload on battery

Core Design Contradiction:

Device complexityVSForce

Solution Approach 1:

The patent segments the fixation system by adding the battery fixation portion as a separate, dedicated component. This segmentation allows the fixation portion to specifically handle loads from side collisions, torsion, and road noise, reducing the overall load on the battery while maintaining structural simplicity.

Inventive Principle:

Principle #1Segmentation

4Reliability

If a bottom panel is provided below the battery to protect the battery, then the battery is protected, but the bottom panel vibrates and generates abnormal noise due to its large shape

Engineering Contradiction:

Improvebattery protectionVSAvoidabnormal noise from vibration

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the physical parameters of the bottom panel by adding the reinforcement patch, which modifies its rigidity and vibrational characteristics. This parameter change reduces the panel's tendency to vibrate and generate abnormal noise while maintaining its protective function.

Inventive Principle:

Principle #35Parameter changes

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

Prevents impact loads and abnormal noise from side collisions and vibrations while maintaining vehicle weight, by using the battery as a mass to stabilize the fixation portion and incorporating a reinforcement patch for additional rigidity.

Implementation Method 1

the battery can act as a mass for the battery placement portion. Therefore, it is possible to prevent the occurrence of abnormal noise due to vibration by preventing the vibration of the battery placement portion using the battery

Methodology Applied

Scientific EffectMass stabilization: Inertia

Implementation Method 2

incorporating a reinforcement patch to enhance rigidity without increasing weight

Methodology Applied

Scientific EffectStructural reinforcement: Composite Materials

Implementation Method 3

the battery placement portion includes a battery fixation portion that is provided on the outer side in the vehicle width direction and is connected to the battery... it is possible to prevent an impact load input due to a side collision from being input to the battery

Methodology Applied

Scientific EffectImpact load absorption: Impact Force

Data Source

PatentUS12594898B2Vehicle structure with battery

Publication Date: 2026.04.07 HONDA MOTOR CO LTD

AI summary

A vehicle structure with a battery includes a battery placement portion, a front cross member, a rear cross member, and left and right rear side frames. The front cross member is disposed at a vehicle forward position of the battery placement portion. The rear cross member is disposed at a vehicle rearward position of the battery placement portion. The left and right rear side frames are disposed on left and right outer sides of the battery placement portion. The battery placement portion includes a battery fixation portion that is provided on an outer side in a vehicle width direction and is connected to a battery.