Electric Vehicle Battery Anti-Collision Structure

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Electric vehicles face increased kinetic energy in collisions due to heavier battery packs, requiring a new vehicle body structure that can safely absorb forces and protect the battery pack during rear collisions, while also accommodating the space occupied by the battery pack.

Innovation Solution

A vehicle body structure for electric vehicles that includes a floor panel, a battery pack anti-collision structure, and a motor placement strategy, where the battery pack anti-collision structure is positioned between the battery pack and the motor to prevent the motor from crashing into the battery pack during rear collisions, thereby changing the motor's movement trajectory to avoid the battery pack and enhance collision safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If more storage batteries are equipped on an electric vehicle to improve endurance mileage, then the weight of the vehicle is greatly increased, but the kinetic energy in collision is increased requiring the vehicle body to bear larger forces

Engineering Contradiction:

Improveendurance mileageVSAvoidcollision force

Core Design Contradiction:

Duration of action of moving objectVSForce

Solution Approach 1:

The vehicle body structure is segmented into distinct functional zones: a first force transmission path for longitudinal collision forces and a second force transmission path for lateral collision forces. The battery pack is isolated from the motor through structural segmentation, with the motor mounted on a motor mounting structure separated from the battery pack by lateral beams and longitudinal beams, preventing direct force transmission between components during collision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a three-dimensional force transmission system with separate longitudinal and lateral force transmission paths. The motor mounting structure uses lateral beams extending in the lateral direction and longitudinal beams extending in the longitudinal direction to create independent force transmission dimensions, allowing the vehicle to handle increased collision forces from heavier battery packs without compromising safety.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If storage battery pack is disposed in the electric vehicle, then much space under the vehicle body is occupied, but classic vehicle body collision safety structure technologies cannot be used

Engineering Contradiction:

Improvestorage battery capacityVSAvoidvehicle body structure

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The lateral beams and longitudinal beams serve multiple functions: they form the motor mounting structure to support the motor, create force transmission paths for collision safety, and establish structural boundaries between the battery pack and motor. This multi-functionality allows the vehicle body structure to accommodate large battery packs while maintaining classic collision safety design principles.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The motor mounting structure acts as an intermediary between the battery pack and the vehicle body structure. It includes lateral beams connected to longitudinal beams, creating a mounted structure that mediates force transmission during collision and prevents direct impact between the motor and battery pack, enabling safe integration of large battery packs.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Volume of moving object

If the motor is positioned behind the battery pack, then space utilization is optimized, but the motor may crash into the battery pack during rear collision

Engineering Contradiction:

Improvespace utilizationVSAvoidcollision damage to battery pack

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The motor mounting structure is designed with lateral beams and longitudinal beams that create a protective framework before collision occurs. The lateral beams extend from the longitudinal beams to form a mounted structure that positions the motor behind the battery pack while preventing forward movement into the battery pack during rear collision, proactively preventing harmful contact.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent converts the potential harmful effect of the motor being positioned behind the battery pack into a beneficial safety feature. The motor mounting structure uses the same spatial arrangement to optimize space utilization while the lateral and longitudinal beams create force transmission paths that redirect collision forces away from the battery pack, turning the proximity arrangement into a safety advantage.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS11161401B2Electric vehicle and vehicle body structure of electric vehicle

Publication Date: 2021.11.02 BYD CO LTD

AI summary

A vehicle body structure of an electric vehicle is provided, including a floor panel and a battery pack anti-collision structure. A battery pack and a motor are disposed below the floor panel, and the motor is located behind the battery pack. The battery pack anti-collision structure is disposed between the battery pack and the motor, and is configured to prevent the motor from crashing into the battery pack when a rear collision occurs to the electric vehicle.