Battery Pack Layout With Nested HV Wiring for Crash Safety
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Solution Overview
Problem
The existing battery pack structure in electric vehicles is prone to safety issues during crashes, as the battery modules can deform and hit or crush the electrical connection assembly, leading to potential damage and safety risks.
Innovation Solution
The proposed battery pack design includes a housing with a bottom plate featuring an accommodating portion, where the high-voltage connection assembly is housed inside the bottom plate, and the control device and low-voltage connection assembly are positioned in the gap between the battery modules, enhancing compactness and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electrical connection assembly is configured in the gap between the battery modules, then the size of the battery pack is reduced, but the safety is worsened due to deformation or breakage of wiring harness during side impact
Solution Approach 1:
The electrical connection assembly is divided into two separate parts: the high-voltage connection assembly is disposed inside the bottom plate, while the control device and low-voltage connection assembly are disposed in the gap between battery modules. This segmentation allows each component to be positioned in an optimal location for its specific function and safety requirements.
Solution Approach 2:
The high-voltage connection assembly is nested inside the bottom plate of the housing, utilizing the internal space of the bottom plate structure. This nesting approach reduces the overall battery pack volume while protecting the high-voltage wiring harness from external impacts.
2Device complexity
If the high-voltage connection assembly is disposed outside the bottom plate, then the structure is simpler, but the safety is worsened due to risk of being struck by foreign objects or deformation during crash
Solution Approach 1:
The high-voltage connection assembly is nested inside the bottom plate, utilizing the internal cavity of the bottom plate structure to house the wiring harness. This nested configuration provides natural protection against foreign objects and crash deformation while maintaining structural integrity.
Solution Approach 2:
The design transitions from a two-dimensional surface arrangement to a three-dimensional spatial utilization by disposing the high-voltage connection assembly within the thickness dimension of the bottom plate, creating a protected internal chamber.
3Volume of moving object
If the control device and low-voltage connection assembly are disposed in the gap, then the space utilization is improved, but the operation accessibility may be affected
Solution Approach 1:
The electrical connection assembly is segmented into high-voltage and low-voltage components, with the control device and low-voltage connection assembly disposed in the gap between battery modules. This segmentation allows these components to be positioned in an accessible location for maintenance while the high-voltage assembly is protected inside the bottom plate.
Data Source
AI summary
The present disclosure provides a battery pack and a vehicle capable of improving safety. A battery pack includes: a housing including a bottom plate, the bottom plate being provided with an accommodating portion; battery modules arranged above the bottom plate and including first battery modules and second battery modules, with a gap between the first battery modules and the second battery modules that overlaps with the accommodating portion when viewed in the up-down direction; a control device configured in the gap; a low-voltage connection assembly electrically connecting the battery modules and the control device and configured in the gap; and a high-voltage connection assembly electrically connecting the battery modules and accommodated in the accommodating portion.