Rolling Press Conductivity Detector for Battery Electrode Manufacturing

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Solution Overview

Problem

Conventional methods for manufacturing lithium-ion battery electrodes require separate testing of conductivity after pressing, which increases processing time and does not allow for real-time measurement of conductivity changes during the pressing process.

Innovation Solution

A rolling press system integrated with a conductivity detector that includes non-conductive rollers and bases, and gold electrodes positioned on the rollers and base to measure conductivity in situ by forming a circuit during the pressing process, enabling simultaneous contact and measurement of conductivity while setting the desired thickness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conductivity testing is performed after pressing, then conductivity measurement is possible, but processing time increases

Engineering Contradiction:

Improveconductivity measurementVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent combines the conductivity detection function with the pressing device by integrating detection electrodes directly into the pressing structure. The first detection electrode is arranged on the first pressing component and the second detection electrode is arranged on the second pressing component, allowing conductivity measurement to occur simultaneously with the pressing operation, thereby eliminating the need for separate post-pressing testing and reducing overall processing time.

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If separate testing equipment is used, then conductivity measurement is possible, but device complexity increases

Engineering Contradiction:

Improveconductivity measurementVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent integrates the conductivity detection system into the pressing device structure. The detection electrodes are arranged on the pressing components themselves, and the control system receives signals from these electrodes during the pressing operation. This integration eliminates the need for separate testing equipment and reduces overall system complexity while maintaining measurement capability.

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

This solution allows for real-time conductivity measurement during the pressing process, reducing processing time and enabling precise control over electrode thickness and porosity, thereby improving the manufacturing efficiency of lithium-ion battery electrodes.

Implementation Method 1

a conductivity detector having a first electrode configured to contact a first side of the battery electrode and a second electrode configured to contact a second side of the battery electrode

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10468666B2Rolling press and conductivity detector for the manufacture of lithium-ion battery electrodes

Publication Date: 2019.11.05 NISSAN MOTOR CO LTD

AI summary

A rolling press for the manufacture of a battery electrode includes a first roller of a non-conductive material, a base of a non-conductive material spaced from the first roller equal to a desired thickness of the battery electrode, and a conductivity detector having a first electrode configured to contact a first side of the battery electrode and a second electrode configured to contact a second side of the battery electrode.