Electric Vehicle Battery Pack High-Power Switch Layout
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Solution Overview
Problem
Existing battery pack structures for electric vehicles face challenges in securing both vehicle body floor upper space and battery mounting space due to the placement of high-power cut-off switches, either leading to increased vehicle height or reduced battery module mounting area.
Innovation Solution
A battery pack structure that divides the inside space of the battery pack case into two areas, with the high-power cut-off switch positioned on the vehicle front or rear side, allowing for independent determination of switch height and battery module mounting area without interference, thus securing both upper space and mounting space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the high-power cut-off switch is mounted on the upper surface of the battery case, then the switch is easily accessible, but the vehicle body floor upper space becomes narrow
Solution Approach 1:
The patent relocates the high-power cut-off switch from the vertical dimension (upper surface of battery case) to the horizontal dimension (front or rear side of battery case in vehicle front-rear direction). This dimensional transition allows the switch to remain accessible while preventing it from protruding upward and encroaching on vehicle body floor upper space.
2Reliability
If the high-power cut-off switch is arranged parallel to the battery module in vehicle width direction, then the switch is protected, but the battery mounting space decreases
Solution Approach 1:
The patent repositions the high-power cut-off switch from the vehicle width direction (parallel to battery module) to the vehicle front-rear direction (perpendicular to battery module). This dimensional reorientation allows the switch to be located in an area that does not overlap with the battery module mounting space, thereby maximizing battery capacity while maintaining switch protection through case coverage.
Data Source
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AI summary
An object of the present invention is to secure both of vehicle body floor upper space and battery mounting space, in setting of a mounting position of a high-power cut-off switch to a battery pack case. Battery pack case 1 having battery modules 2 and SD switch 4 that cuts off battery high-power circuit by manual operation is arranged in a lower position of vehicle body floor 100. In this battery pack structure for electric vehicle, an inside space of the battery pack case 1 is divided into two areas in a vehicle front-and-rear direction, and one of the two areas is defined as a battery module mounting area 7. SD switch 4 is provided in an upper surface position of the case that covers an electrical component mounting area 8, which is the other area, located on a vehicle front side with respect to battery module mounting area 7.