Resin Gap Filling in All-Solid-State Battery Casing
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Solution Overview
Problem
All-solid-state batteries housed in metal outer casings are prone to deterioration due to movement within the casing, leading to short-circuiting and damage of fragile active material layers, which results in battery degradation.
Innovation Solution
An all-solid-state battery design featuring a metal outer casing with a resin sealing body that penetrates the gap between the battery element and the casing, forming a gap filling body to prevent movement and secure the battery elements, using protrusions from the current collector layers to anchor the battery in place, and employing a production method involving the injection and curing of a resin to create this sealing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the all-solid-state battery element is housed in a metal outer casing, then the battery structure is simplified and manufacturing is easier, but the battery element moves within the casing due to vibration causing short-circuiting and damage
Solution Approach 1:
A resin sealing body is introduced as an intermediary material between the all-solid-state battery element and the metal outer casing. This resin penetrates into the gap between them to form a gap filling body, which acts as a mediator that prevents direct contact while securing the battery element against movement and vibration, thereby eliminating short-circuiting risks without complicating the manufacturing process
Solution Approach 2:
The resin sealing body is applied in advance to fill the gap between the battery element and casing before final assembly completion. This preliminary action of penetrating and curing the resin creates a pre-established protective structure that prevents movement issues from occurring during subsequent handling and operation
2Reliability
If the battery element is secured firmly in the metal outer casing, then movement and short-circuiting are prevented, but the fragile active material layers may be damaged during installation
Solution Approach 1:
The resin sealing body serves as a cushioning intermediary that fills the gap between the battery element and metal casing. This soft, penetrable material provides gradual support rather than rigid constraint, securing the battery element against movement while distributing mechanical stresses to protect the fragile active material layers from damage during installation and operation
3Reliability
If a resin sealing body is used to prevent battery element movement, then reliability is improved, but the device complexity increases
Solution Approach 1:
The resin sealing body performs multiple functions simultaneously: it seals the opening of the metal outer casing, penetrates to fill the gap between the battery element and casing, provides mechanical support to prevent movement, and offers cushioning protection. This multi-functionality consolidates several protective mechanisms into a single component, improving reliability without proportionally increasing device complexity
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 solution effectively prevents movement and deterioration of the battery elements, thereby enhancing the stability and longevity of the all-solid-state battery by securely anchoring the battery within the casing and preventing short-circuiting and breakage of active material layers.
Implementation Method 1
the resin sealing body penetrates at least part of a gap between the outer circumference of the all-solid-state battery element and the inner circumference of the metal outer casing to form a gap filling body
Data Source
AI summary
To provide an all-solid-state battery and a production method thereof, ensuring that deterioration of the all-solid-state battery resulting from movement of an all-solid-state battery element inside a metal outer casing is prevented.An all-solid-state battery comprising an all-solid-state battery element, a metal outer casing having an opening at least at one end, in which the all-solid-state battery element is housed, a resin sealing body sealing the opening and contacting with an all-solid-state battery element surface facing the opening, and a negative electrode current collector layer protrusion and a positive electrode current collector layer protrusion, each protruding from the resin sealing body to the opposite side of the all-solid-state battery element, wherein the resin sealing body penetrates at least part of a gap between the outer circumference of the all-solid-state battery element and the inner circumference of the metal outer casing to form a gap filling body.