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Lithium battery and battery apparatus having said battery

A lithium battery, lithium ion technology, applied in battery electrodes, batteries, secondary batteries, etc., can solve the problems of complex control technology and the increase of total battery cost.

Inactive Publication Date: 2004-10-13
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the protection circuit against overcharging requires complex control technology and becomes a significant factor in increasing the total cost of the battery

Method used

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  • Lithium battery and battery apparatus having said battery
  • Lithium battery and battery apparatus having said battery
  • Lithium battery and battery apparatus having said battery

Examples

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Embodiment 1

[0031] Polyethylene terephthalate (PET) nonwoven fabric (thickness 30 μm) was used as a reinforcing material, and polyvinylidene fluoride ( PVDF) resin was integrally formed, and the separator 10 made of a composite resin film was produced. This separator 10 was used as the separator a of Example 1.

Embodiment 2

[0033] Polyvinylidene fluoride (PVDF) resin films are bonded to both sides of the microporous film made of polyethylene (PE) (thickness 30 μm), and composited into a whole to produce a composite resin Membrane separator 10 . This separator 10 was used as the separator b of Example 2.

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Abstract

Provided are a lithium secondary battery that does not cause overcharged state and a battery apparatus equipped with the battery that does not need a protective circuit by means of the lithium secondary battery. The lithium secondary battery is constituted by disposing a negative pole (e.g. graphite) that can absorb and desorb lithium ions and a positive pole using lithium-contained metal oxide (e.g. Li-contained cobalt oxide) as a substance to activate the positive pole by sandwiching a separator containing poly-vinylidene fluoride(PVdF) in between the two poles, and then by injecting a nonaqueous electrolyte. In the lithium secondary battery constituted like this, battery voltage does not rise above the rated voltage even when overcharged.

Description

technical field [0001] The invention relates to a lithium storage battery and a battery device with the lithium storage battery, in particular to a lithium storage battery comprising: a negative electrode capable of absorbing and desorbing lithium ions, a positive electrode with a lithium-containing metal oxide as the positive electrode active material, a non-aqueous Lithium storage battery with electrolyte, separator separating positive and negative electrodes, and battery device having the lithium storage battery. Background technique [0002] In recent years, the miniaturization and weight reduction of electronic devices have been greatly developed, and accordingly, there is a great demand for smaller and lighter batteries that are expected to be used as power sources. Therefore, lithium secondary batteries represented by lithium ion batteries are put into practical use as small, lightweight, high-capacity rechargeable and dischargeable batteries, and are used in portable...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/525H01M4/58H01M4/587H01M10/0525H01M10/36H01M10/42H01M50/417H01M50/426
CPCH01M10/4235Y02E60/122H01M2/1606H01M4/587H01M10/0525H01M2/164H01M4/525H01M2/1653Y02E60/10H01M50/44H01M50/417H01M50/426H01M50/449H01M50/491H01M50/489H01M4/131H01M4/505H01M4/133H01M2200/00
Inventor 渡边浩志中沟紫织生川训
Owner SANYO ELECTRIC CO LTD
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