Battery Cell Pack Channel Structure for Venting and Thermal Isolation

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Solution Overview

Problem

Existing battery cell configurations in electric vehicles require additional safety measures and thermal insulation, increasing the height and weight of the battery pack, which affects vehicle efficiency and space utilization.

Innovation Solution

A battery cell pack design with a frame and thermal protection plate on the bottom side, featuring intermediate frame walls and a thermal protection plate that form a channel for gas venting, along with a cooling plate on the top side, reducing the need for additional protection barriers and minimizing the battery's height and weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a thermal protection plate is placed between the battery cell and the vehicle cabin floor, then passenger safety is improved, but the battery height increases

Engineering Contradiction:

Improvepassenger safetyVSAvoidbattery height

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent combines the thermal protection plate with the cooling plate into a single integrated component. The cooling plate serves dual functions: it cools the battery cells from above and provides thermal protection to the vehicle cabin from below, eliminating the need for a separate protection barrier and reducing overall battery height

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cooling plate is designed to perform multiple functions simultaneously: thermal management (cooling the cells) and safety protection (shielding the cabin from thermal runaway). This multi-functionality resolves the contradiction by eliminating redundant components

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If additional protection barriers and thermal insulation materials are added, then safety is improved, but the battery pack weight increases

Engineering Contradiction:

ImprovesafetyVSAvoidbattery pack weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent merges the thermal protection plate with the cooling plate structure, eliminating the need for separate protection barriers and thermal insulation materials. This integration reduces the total material used and consequently reduces the battery pack weight while maintaining safety

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated cooling and protection plate performs both safety protection and thermal management functions, eliminating redundant components and reducing overall weight

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If a thermal protection plate is placed between the battery cell and the vehicle cabin, then thermal safety is improved, but space utilization decreases

Engineering Contradiction:

Improvethermal safetyVSAvoidspace utilization

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent combines the thermal protection function with the cooling plate, eliminating the need for additional space-consuming protection barriers and allowing more efficient use of available space in the vehicle

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If intermediate frame walls are placed between terminal openings and vent opening, then short circuit risk is reduced, but device complexity increases

Engineering Contradiction:

Improveshort circuit preventionVSAvoidframe structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The intermediate frame walls are integrated into the overall frame structure as a unified component rather than separate additions. This integration provides electrical isolation between terminals and the vent opening while maintaining structural simplicity and avoiding increased device complexity

Inventive Principle:

Principle #5Merging (Combining)

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

The design provides enhanced safety and thermal management while maintaining a compact structure, reducing the risk of short circuits and thermal runaway, and optimizing space utilization in the vehicle.

Implementation Method 1

a cooling plate on the top side of the battery cell

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

a thermal protection plate extending between the intermediate frame walls... providing a protection barrier for the vehicle cabin

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 3

The cell venting allows flammable gas, produced by an electrolyte in the cell, to be released during battery life

Methodology Applied

Scientific EffectGas venting: Pressure Gradient

Data Source

PatentUS12469903B2Battery cell pack for electric vehicle

Publication Date: 2025.11.11 VOLVO CAR CORP

AI summary

A battery cell pack includes a battery cell having first and second terminals and a gas vent on a bottom side of the battery cell; a frame on the bottom side of the battery cell, the frame including: a frame plate including first and second openings aligned with the first and second terminals and a third opening aligned with the gas vent, and first and second intermediate frame walls extending perpendicular to the frame plate; and a thermal protection plate extending between the intermediate frame walls, wherein the intermediate frame walls and the thermal protection plate form a channel along a length of the bottom side of the battery cell between the terminals. The present disclosure further relates to a battery pack including a plurality of battery cell packs and an electric vehicle including a battery pack.