Conductive Battery Casing Grounding for EV Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost and complexity of assembly associated with connecting a battery controller and a module base using a thick ground wire in electrical storage devices for vehicles.
Innovation Solution
An electrical storage device design where the battery house casing is conductively connected to the chassis, eliminating the need for a separate ground wire by integrating the control unit's negative terminal with the casing, which is then mounted on the battery house casing to manage battery cells and provide a ground path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick ground wire is used to connect the battery controller and module base, then reliable grounding is achieved, but cost and assembly complexity increase
Solution Approach 1:
The patent merges the grounding function with the battery house casing structure itself. The control unit is mounted directly on the conductive battery house casing, which serves as the ground path to the chassis, eliminating the need for a separate ground wire and simplifying the grounding structure while maintaining reliability
2Reliability
If a thick ground wire is used to connect the battery controller and module base, then reliable grounding is achieved, but cost increases
Solution Approach 1:
The grounding function is merged into the battery house casing structure. The conductive casing serves dual purposes: housing the battery cells and providing the ground path. This eliminates the need for expensive thick ground wires while maintaining grounding reliability
Solution Approach 2:
The battery house casing is given multiple functions: it serves as both the structural housing for battery cells and as the ground path for the control unit. This multi-functionality eliminates the need for separate grounding components, reducing manufacturing cost
3Reliability
If a separate ground wire connection is implemented, then grounding is provided, but wiring complexity increases
Solution Approach 1:
The grounding connection is merged with the mechanical mounting structure. The control unit is mounted on the conductive battery house casing, which directly provides the ground connection to the chassis, eliminating separate wiring and reducing wiring complexity
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
Simplifies the grounding structure, reduces wiring complexity, and prevents noise contamination, while maintaining effective electrical connectivity without the need for a special ground wire.
Implementation Method 1
a conductive battery house casing electrically connected to a chassis; a control unit that comprises a circuit that manages the plurality of battery cells and is mounted on the battery house casing so that a negative terminal of the circuit and the battery house casing are electrically conducting
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electrical storage device includes: a conductive battery house casing 110 electrically connected to a chassis 500; a plurality of battery cells 140 held in the battery house casing 110; and a control unit 900 that comprises a circuit that manages the plurality of battery cells 140 and is mounted on the battery house casing 110 so that a negative terminal of the circuit and the battery house casing 110 are electrically conducting.