Battery Pack Mounting Structure With Low Cable Lead-Out
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Solution Overview
Problem
In existing battery pack mounting structures for vehicles, internal cables within the battery case are prone to getting wet when water enters, and the external cables can constrain vehicle compartment space.
Innovation Solution
The internal cable is positioned above the batteries, and the cable lead out part is located lower than the battery case's upper ends, allowing the external cable to be disposed at a low position, reducing the height of the floor panel and preventing water ingress while maintaining assembly ease and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal cable is disposed below the upper face of the battery module, then the cable lead out part can be positioned at a lower height, but the internal cable becomes prone to wetting when water enters the battery case
Solution Approach 1:
The patent transitions from a two-dimensional layout (cable below battery upper face) to a three-dimensional arrangement (cable above battery upper face), utilizing vertical space to resolve the contradiction between cable protection and floor panel height
2Reliability
If the cable lead out part is positioned at a higher location to protect the internal cable, then water ingress is prevented, but the vehicle compartment space is constrained
Solution Approach 1:
The patent utilizes the vertical dimension by positioning the cable lead out part at a lower height than the battery upper face, thereby protecting the cable while maintaining adequate vehicle compartment space
3Reliability
If the external cable is routed at a higher position, then internal cable protection is improved, but the bending curvature increases and assembly becomes more difficult
Solution Approach 1:
The patent employs vertical positioning of the cable lead out part below the battery upper face to create a more favorable routing path, reducing bending curvature and simplifying assembly operations
Data Source
AI summary
In a structure for mounting a battery pack on a vehicle, even if a battery case housing a plurality of batteries is disposed beneath a floor panel, due to an internal cable within the battery case being disposed above the batteries, it is possible to prevent the internal cable from becoming wet. Furthermore, if the internal cable disposed above the batteries were connected to an external cable via a high voltage connector without changing the height, the height of the floor panel would increase to thus constrain the vehicle compartment space, but since the high voltage connector is disposed at a position that is lower than the upper end of the battery, it is possible to decrease the height of the floor panel by disposing the external cable at a low position, thereby ensuring the vehicle compartment space.