US12573666USUSPTO Grant XML

Electrode plate, nonaqueous electrolyte secondary battery, and electrode plate manufacturing method

This positive electrode plate, included in a rolled electrode body, is characterized by comprising a belt-shape positive electrode core, a positive electrode active material layer which, along the long direction of the positive electrode core, is formed in a belt shape on at least part of the surface of the positive electrode core, and a positive electrode tab which extends in the short direction of the positive electrode core from the active material layer-uncoated area of the surface of the positive electrode core where the positive electrode active material layer is not formed, and the root width H 1 and the maximum width H 2 of the positive electrode tab satisfy the relation 0.4 H 2 H 1 0.9 H 2.

Patent

Brief

Patent brief

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Novelty

Fire-resistant electrolytes is reinforced by front-page matches on electrolyte, electrode.

Uses

Lithium-ion cells, EV batteries, Grid storage

Assignee

SANYO Electric Co., Ltd.

Published

Mar 10, 2026

Inventors

Kentaro Tsukamoto, Atsutoshi Ako, Yoshifumi Magari

Domain

Mobility / storage

Plain-English summary

Problem

How can battery fires and thermal runaway in EV packs be prevented?

Solution

Key novelty

Fire-resistant electrolytes is reinforced by front-page matches on electrolyte, electrode.

Applications

Lithium-ion cellsEV batteriesGrid storageContaminant removal

Relevant search intents

electrolyteelectrode

Claims preview

1 . An electrode plate to be included in a wound shape electrode assembly, having: a belt-shaped electrode plate core body having a first side and a second side which are opposite to each other and extend in a longitudinal direction, the first side extending straight in the longitudinal direction; an active material layer formed in a belt shape on at least a part of a surface of the electrode plate core body along the longitudinal direction of the electrode plate core body; and a tab extending in a short-length direction of the electrode plate core body from the first side of the electrode plate core body, wherein the active material layer is located away for the first side of the electrode plate such that the surface of the electrode plate core body includes an active material layer-uncoated part which includes the first side and on which where the active material layer is not formed, the tab has two sides which are opposite to each other and extend from two intersection points on the first side of the electrode plate core body in directions away from the electrode plate core body, wherein at the two intersection points, an angle formed by the first side of the electrode plate core body and each of the two sides of the tab is an acute angle at a base of the tab, and a base width H 1 of the tab which is a distance between the two intersection points and a maximum width H 2 of the tab satisfy a relationship of 0.4 H 2 H 1 0.9 H 2 . 2 . The electrode plate according to claim 1 , wherein the base width H 1 of the tab is 12 mm or less. 3 . The electrode plate according to claim 1 , wherein the active material layer has a filling density of 3.5 g/cm 3 or more and 3.7 g/cm 3 or less.

Linked approaches

Fire-resistant electrolytes

Electrolyte formulations that suppress ignition and heat release.

Electrochemical treatment

Electrochemical processes that separate or degrade contaminants in water.

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