Rechargeable Battery Insulation Plate Pivoting Mechanism

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Solution Overview

Problem

Rechargeable batteries face damage due to impacts, particularly in the vertical direction, due to structural vulnerabilities in multi-tab structures and welding failures.

Innovation Solution

A rechargeable battery design featuring a case with an electrode assembly, terminals, a cap plate, and an insulation plate that pivots to balance the electrode assembly, with hooks and coupling openings to secure the insulation plate to gaskets, providing protection against impacts and maintaining the electrode assembly's position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multi-tab structures are used to increase battery capacity, then battery capacity is improved, but structural vulnerability increases due to thickness

Engineering Contradiction:

Improvebattery capacityVSAvoidstructural vulnerability

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The electrode assembly is divided into multiple electrode sub-assemblies connected in parallel, with tabs extending from each sub-assembly. This segmentation allows the thick multi-tab structure to be divided into thinner individual tabs, reducing structural vulnerability while maintaining high capacity through parallel connection of multiple sub-assemblies.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If multi-tab structures are used to increase battery capacity, then battery capacity is improved, but welding failures increase

Engineering Contradiction:

Improvebattery capacityVSAvoidwelding failures

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The multi-tab structure is segmented into multiple electrode sub-assemblies with individual tabs. This reduces the thickness of each tab, improving welding reliability by reducing welding failures while maintaining high capacity through parallel connection of multiple sub-assemblies.

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If the insulation plate is fixed rigidly to the cap plate, then structural stability is improved, but damage from vertical impacts increases

Engineering Contradiction:

Improvestructural stabilityVSAvoiddamage from impacts

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The insulation plate is coupled to the cap plate through protrusions that allow pivoting motion. This dynamic coupling enables the insulation plate to move and pivot in response to vertical impacts, absorbing impact energy and reducing damage to the electrode assembly while maintaining structural stability during normal operation.

Inventive Principle:

Principle #15Dynamics

4Object-affected harmful factors

If the insulation plate is made movable with respect to the cap plate, then protection against impacts is improved, but structural stability deteriorates

Engineering Contradiction:

Improveprotection against impactsVSAvoidstructural stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The insulation plate is coupled to the cap plate through protrusions that enable controlled pivoting motion. This dynamic coupling provides protection against vertical impacts by allowing the insulation plate to move and absorb impact energy, while maintaining structural stability during normal battery operation through the constrained pivoting mechanism.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3168896B1Rechargeable battery

Publication Date: 2019.10.23 SAMSUNG SDI CO LTD

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AI summary

The present invention refers to a rechargeable battery (100, 200) including: a case (110); an electrode assembly (120) including a plurality of electrode sub-assemblies accommodated in the case (110); a plurality of terminals (140, 145) electrically connected to the electrode assembly (120); a cap plate (130) sealing the case (110); and an insulation plate (160) between the electrode assembly (120) and the terminals (140, 145, 250, 255) and being movably coupled to the cap plate (130). The terminals protrude through the cap plate (130).