Battery Pack CCS Sealing Structure for Compact Integration

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Solution Overview

Problem

The existing battery pack sealing designs occupy significant internal space, which is not compatible with the demand for a compact and highly integrated battery structure.

Innovation Solution

A sealant component is configured between the battery box and the CCS assembly to seal the assembly clearance, eliminating the need for additional space-consuming sealing ribs, and is extended along the peripheral direction to enhance sealing and space utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sealing ribs are used to seal the battery pack, then sealing reliability is improved, but space utilization deteriorates

Engineering Contradiction:

Improvesealing reliabilityVSAvoidspace utilization

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent replaces the mechanical sealing rib structure with a sealant material that is injected into the sealing cavity. The sealant fills the clearance between the upper box cover and lower box body, achieving sealing through material filling rather than mechanical protrusion. This substitution eliminates the space-consuming sealing rib while maintaining sealing effectiveness.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the sealing approach from a rigid mechanical structure (sealing rib) to a flexible material-based solution (sealant). The sealant can adapt to varying clearance dimensions and provides sealing through its material properties rather than fixed geometric form, allowing for better space utilization while maintaining reliable sealing.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If sealing ribs are configured on the battery box, then sealing performance is improved, but device complexity increases

Engineering Contradiction:

Improvesealing performanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the sealing function from the mechanical sealing rib structure and transfers it to a separate sealant material. The sealant is injected into the sealing cavity as a distinct component, separating the sealing function from the structural components (upper box cover and lower box body). This simplifies the overall structure by eliminating the need for integrated sealing ribs.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sealant acts as an intermediary material between the upper box cover and lower box body. Instead of the structural components directly providing sealing through integrated ribs, the sealant mediates the sealing function by filling the clearance between these components. This intermediary approach simplifies the structural design while maintaining sealing performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250309490A1Battery pack and electrical apparatus

Publication Date: 2025.10.02 EVE ENERGY CO LTD

AI summary

Disclosed is a battery pack, including a cell contact system, CCS, assembly; a battery box, in which the CCS assembly is mounted and fixed in the battery box; and a sealant component, in which the sealant component is provided between the battery box and the CCS assembly, and the sealant component is extended along a peripheral direction of the CCS assembly to seal an assembly clearance between the CCS assembly and the battery box.