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Sealed nonaqueous electrolyte secondary battery

A non-aqueous electrolyte and secondary battery technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, non-aqueous electrolytes, etc., can solve problems such as exceeding the specified voltage, and achieve the effect of improving reliability

Active Publication Date: 2014-11-05
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Sealed non-aqueous electrolyte secondary batteries are usually used in a state where the voltage is controlled so as to be limited to a specified range (for example, 3.0V to 4.2V). specified voltage and become overcharged

Method used

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  • Sealed nonaqueous electrolyte secondary battery
  • Sealed nonaqueous electrolyte secondary battery
  • Sealed nonaqueous electrolyte secondary battery

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Embodiment Construction

[0038] In this specification, a "nonaqueous electrolyte secondary battery" refers to a battery including a nonaqueous electrolyte (typically, an electrolyte containing a supporting electrolyte in a nonaqueous solvent). Secondary batteries, commonly referred to as lithium batteries, lithium polymer batteries, lithium ion capacitors, etc., are secondary batteries that use lithium ions as electrolyte ions to achieve charge and discharge through the movement of charges accompanying lithium ions between the positive and negative electrodes. Typical examples of non-aqueous electrolyte secondary batteries included in this specification. In addition, in this specification, "active material" refers to a substance capable of reversibly occluding and releasing chemical species (for example, lithium ions, sodium ions, lithium ions in lithium batteries) serving as charge carriers on the side of the positive electrode or the negative electrode. (compound).

[0039] It should be noted that ...

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Abstract

Provided is a sealed nonaqueous electrolyte secondary battery, which is equipped with a current blocking mechanism that is actuated by an increase in the internal pressure of a battery case, and wherein the mechanism quickly and stably operates at the time of overcharging. This sealed nonaqueous electrolyte secondary battery is obtained by having a battery case contain an electrode body, in which a positive electrode (10) and a negative electrode face each other with a separator interposed therebetween, an electrolyte and an overcharge inhibitor. The positive electrode (10) is provided with a positive electrode collector (12) and a positive electrode active material layer (14) that is formed on the collector and contains a positive electrode active material as a main component. In addition, a conductive material layer (16), which contains a conductive material as a main component, is formed between the positive electrode active material layer (14) and the separator, and the conductive material layer (16) has a porosity of from 35% to 55% (inclusive).

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte secondary battery. More specifically, it relates to a sealed non-aqueous electrolyte secondary battery provided with a current interruption mechanism that operates when internal pressure rises. [0002] It should be noted that this international application claims priority based on Japanese Patent Application No. 2012-037967 filed on February 23, 2012, and the entire contents of this application are incorporated herein as a reference. Background technique [0003] Lithium-ion secondary batteries and other secondary batteries are smaller and lighter than conventional batteries, have higher energy density, and are excellent in output density. Therefore, in recent years, it has been preferably used as a so-called portable power source for personal computers, mobile terminals, and the like, and a power source for driving vehicles. [0004] As one embodiment of the above-mentioned battery, a sealed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131B60L11/18H01M2/10H01M2/34H01M10/052H01M10/0567H01M10/058
CPCH01M2220/20H01M10/0587H01M10/0567H01M10/0525H01M2/34H01M10/0565Y02T10/7011H01M2/1077Y02E60/122H01M4/625H01M10/4235H01M2004/021H01M4/366H01M50/578Y02E60/10Y02E60/50Y02P70/50H01M4/13H01M2200/20H01M50/20H01M50/10H01M50/572H01M4/8889H01M4/8657Y02T10/70H01M10/052H01M2300/0017
Inventor 高畑浩二落合章浩
Owner TOYOTA JIDOSHA KK
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