Auxiliary Battery Buffering for Propulsion Protection
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Solution Overview
Problem
In conventional electrically driven vehicle battery systems, the vertical stacking of propulsion and auxiliary batteries leads to simultaneous impact during rear collisions, failing to protect the propulsion battery from rear-end collision impacts.
Innovation Solution
The propulsion battery is positioned in the vehicle's front side space of the rear room, with the auxiliary battery placed rearward and overlapping with the propulsion battery in the longitudinal direction, acting as a buffer to absorb impact energy and protect the propulsion battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the auxiliary battery is disposed on the upper surface of the propulsion battery (vertical stacking layout), then the space utilization is improved, but the propulsion battery cannot be protected from rear collision impact
Solution Approach 1:
The patent changes the spatial arrangement from vertical stacking (one dimension) to longitudinal separation with overlap (another dimension). The auxiliary battery is positioned rearward of the propulsion battery in the longitudinal direction, creating a longitudinal buffer zone that absorbs impact forces while maintaining space efficiency through overlapping布置.
Solution Approach 2:
The auxiliary battery serves as an intermediary buffer between the external impact force and the propulsion battery. By positioning the auxiliary battery rearward, it acts as a mediator that absorbs and dissipates collision energy before it reaches the propulsion battery, protecting the more critical propulsion battery from direct impact.
2Object-affected harmful factors
If the auxiliary battery is positioned rearward of the propulsion battery with longitudinal overlap, then the propulsion battery is protected from rear collision impact, but the space arrangement becomes more complex
Solution Approach 1:
The auxiliary battery serves multiple functions: it provides electrical power for auxiliary equipment and simultaneously acts as a collision buffer protecting the propulsion battery. This multi-functionality simplifies the overall design by eliminating the need for separate protective structures, as the auxiliary battery's positioning provides both functional and protective roles.
Solution Approach 2:
The patent merges the protective function with the existing auxiliary battery component. Instead of adding a separate buffer structure, the design combines the buffer function with the auxiliary battery's natural positioning, creating an integrated solution that reduces overall system complexity while achieving collision protection.
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 uses the auxiliary battery as a buffer to absorb and distribute rear-end collision forces, protecting the propulsion battery from impact damage and enhancing collision protection without additional protective members.
Implementation Method 1
at the time of rear collision, the auxiliary battery, which is disposed in a vehicle rear side space rearward of the propulsion battery and in an position in which the auxiliary battery overlaps with the propulsion battery with respect to the vehicle longitudinal direction, receives the impact force due to a rear end collision first and thus serves as a buffer member for absorbing an impact energy
Data Source
AI summary
A vehicle battery system component layout structure is basically provided with a center room, a rear room, a vehicle propulsion battery and an auxiliary battery. The center room of a vehicle is configured to seat a driver and a passenger. The rear room of the vehicle is disposed rearward of the center room. The vehicle propulsion battery is disposed in a vehicle front side space in the rear room. The auxiliary battery is disposed in a vehicle rear side space in the rear room rearward of the propulsion battery and in a position in which the auxiliary battery overlaps with the propulsion battery in a vehicle longitudinal direction as viewed from a rear end of the vehicle.