Protective elements and batteries
A flame-retardant, heat-reflective protective element for lithium-ion batteries locally breaks at vents during thermal runaway, controlling gas release and preventing cell-to-cell ignition, addressing the rapid spread of thermal runaway.
JP2026518054APending Publication Date: 2026-06-03サン-ゴバン アドフォース ソシエテ アノニム
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- サン-ゴバン アドフォース ソシエテ アノニム
- Filing Date
- 2024-05-22
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Lithium-ion batteries are prone to thermal runaway, which can rapidly spread from one cell to adjacent cells, causing explosions, toxic gas release, and pressure buildup, due to instability in the separator and potential short circuits.
Method used
A protective element with a fibrous layer coated with a flame-retardant and heat-reflective coating is applied to battery cells, designed to break locally at vents during thermal runaway, allowing controlled gas release and preventing propagation to adjacent cells.
Benefits of technology
The protective element effectively contains thermal runaway by allowing controlled gas release, cooling the gases, and maintaining integrity to prevent further cell ignition, thus safeguarding adjacent cells.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026518054000001_ABST
Abstract
The present invention relates to a protective element for thermal insulation and / or protection of a rechargeable battery, preferably a lithium-ion battery or a sodium-ion battery and / or a traction battery for an electric vehicle, wherein the protective element has a particularly woven, fibrous layer, preferably the fibers and / or fibrous layer having a flame-retardant finish, the finish particularly containing a metal oxide. According to the present invention, the fibrous layer is preferably coated with a heat-reflective, flame-retardant, and / or dustproof coating. In a further embodiment, the present invention also relates to a rechargeable battery having several battery cells arranged adjacent to each other, wherein the battery cells have vents, which are configured to allow hot gases and / or particles to be released through the vents of the battery cells in the event of thermal runaway in the battery cells, and the battery includes a protective element covering one or more of the vents in particular.
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