Battery Cooling Plate Cutouts for Insulation Inspection Access

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Solution Overview

Problem

Existing cooling plates in battery assemblies can obstruct insulation inspections by interfering with inspection terminals, making it difficult to evaluate short-circuits between metal components.

Innovation Solution

Incorporating cutouts or through-holes in the side surface portions of the cooling plate allows inspection terminals to access the laminating film's metal layer without contacting the cooling plate, enabling effective insulation inspection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a cooling plate is used for heat dissipation in battery assemblies, then heat dissipation performance is improved, but insulation inspection becomes difficult due to obstruction by the cooling plate

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidinsulation inspection difficulty

Core Design Contradiction:

TemperatureVSDifficulty of detecting and measuring

Solution Approach 1:

The cooling plate is segmented by forming cutouts or through-holes in its side surface portions, dividing the solid structure into sections that allow inspection terminals to pass through and access the metal layer for insulation inspection while maintaining heat dissipation functionality in the remaining portions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cutout or through-hole acts as an intermediary passage that enables the inspection terminal to reach the metal layer without direct contact with the cooling plate, facilitating insulation inspection while the cooling plate continues to perform its heat dissipation function

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Facilitates accurate evaluation of short-circuits between the metal layer and current collector terminal, and between the metal layer and the cooling plate, ensuring reliable insulation inspection without obstructing heat dissipation.

Implementation Method 1

heat generated from the laminated type battery in the charging and discharging is conducted to the case side and thus each unit cell is cooled

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20250216478A1Cooling plate for battery, battery assembly, and inspection method therefor

Publication Date: 2025.07.03 TOYOTA JIDOSHA KK

AI summary

A cooling plate for battery of the present disclosure includes a flat surface portion, and a pair of side surface portions facing each other. In the cooling plate for battery, a cutout or through-hole is formed in at least one of the side surface portions. A battery assembly of the present disclosure includes the cooling plate for battery, and a battery disposed on the flat surface portion of the cooling plate for battery. The battery in the battery assembly includes an electrode stack, a current collector terminal, and a laminating film. The laminating film includes a fusion resin layer, a metal layer, and a protection resin layer, and an extending portion. The extending portion is bent toward the electrode stack, and the cooling plate for battery is disposed such that at least one of the side surface portions of the cooling plate for battery faces the bent extending portion.