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Batteries, electrolyte layers, battery packs, electronic equipment, electric vehicles, power storage devices, and power systems

一种电解质层、电子设备的技术，应用在电力系统领域，能够解决剧烈放出、隔离膜破裂、热量大等问题，达到抑制热分解反应的效果

Active Publication Date: 2017-10-13
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, regarding applications in electric tools, electric vehicles, etc., there are many cases in which heat dissipation cannot keep up with heat generation caused by large current discharge even for a short time, and there are cases where the temperature increase of the battery cannot be avoided
In particular, when the battery is short-circuited externally or internally, there is a risk that the heat released from the negative electrode side is large, and this heat ruptures the separator so that the short-circuit can be further extended, or the positive electrode is heated to a thermal decomposition temperature, and Will violently emit heat or gas from the battery

Method used

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  • Batteries, electrolyte layers, battery packs, electronic equipment, electric vehicles, power storage devices, and power systems
  • Batteries, electrolyte layers, battery packs, electronic equipment, electric vehicles, power storage devices, and power systems
  • Batteries, electrolyte layers, battery packs, electronic equipment, electric vehicles, power storage devices, and power systems

Examples

Experimental program
Comparison scheme
Effect test

no. 4 approach

[0036] 4. Fourth embodiment (example of power storage system)

[0037] 5. Other implementations (modifications)

[0038] 1. The first embodiment

[0039] (1-1) Configuration of non-aqueous electrolyte battery

[0040] In the first embodiment, a composite thin film type battery will be explained.

[0041] figure 1 The configuration of the nonaqueous electrolyte battery 62 according to the first embodiment is shown. This non-aqueous electrolyte battery 62 is a so-called composite film type battery in which a wound electrode assembly 50 equipped with a positive electrode lead 51 and a negative electrode lead 52 is accommodated inside a film-shaped exterior member 60 .

[0042] The positive electrode lead 51 and the negative electrode lead 52 are drawn out from the inside of the exterior member 60 toward the outside, for example, in the same direction, respectively. For example, the positive electrode lead 51 and the negative electrode lead 52 are respectively made of a metal...

no. 1 example

[0147] [First example: Production method based on phase separation]

[0148] The resin material constituting the resin layer and the particles are mixed in a predetermined ratio, the mixture is added to a dispersion solvent (for example, N-methyl-2-pyrrolidone), and a resin solution is obtained by dissolving the resin material. Subsequently, this resin solution is coated or transferred on at least one surface of the separator 55 . At the same time, apply or transfer the resin solution, adjust the amount of particles per unit area to meet the conditions of this technology, and the total heat capacity per unit area should be 0.0001J / Kcm 2 above. One example of a method of applying the resin solution is a method of applying using a bar coater or the like.

[0149] Subsequently, the separator 55 on which the resin solution is applied is submerged into a water tank so that the resin solution undergoes phase separation, thus forming a resin layer. The resin solution applied on th...

no. 2 example

[0161] [Second example: production method based on high temperature drying]

[0162] The resin material and particles constituting the resin layer are mixed by a predetermined mass ratio, and the mixture is added to a dispersion solvent (for example, 2-butanone (methyl ethyl ketone; MEK) or N-methyl-2-pyrrolidone (NMP)) , and dissolve the mixture to obtain a resin solution. Subsequently, this resin solution is coated on at least one surface of the separator. At the same time, the resin solution is coated, and the amount of particles per unit area is adjusted to meet the conditions of this technology, and the total heat capacity per unit area should be 0.0001J / Kcm 2 above.

[0163]Subsequently, the resin solution-coated separator 55 is dried, for example, by a method such as passing the separator through a drying oven to volatilize the dispersion solvent, thereby forming a resin layer. At this time, it is preferable to set the temperature at the time of drying sufficiently h...

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Abstract

A gel electrolyte layer provided between a positive electrode and a negative electrode, comprising particles, a resin material, and a polymer compound for holding the resin material, wherein the heat capacity per unit surface area is equal to or greater than 0.0001 J / Kcm2 and The heat capacity per unit volume is equal to or less than 3.0J / Kcm3.

Description

technical field [0001] The technology relates to a battery. Furthermore, the present invention relates to an electrolyte layer provided between electrodes of a battery, a battery pack, electronic equipment, an electric vehicle, an electric storage device, and an electric power system each using the battery. Background technique [0002] In recent years, with the popularization of portable information-related electronic devices such as mobile phones, video cameras, and laptop computers, performance improvement, size reduction, and weight reduction of these devices have been promoted. For the power supply of these devices, disposable primary batteries or secondary batteries that can be reused are used; The demand for non-aqueous electrolyte batteries, especially for lithium-ion secondary batteries, is increasing. Also, these settings are being further enhanced in performance, reduced in size, etc., and there is also a new demand for increasing the energy density of nonaqueou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/052H01M10/0562H01M10/44H01M50/434H01M50/469H01M50/489
CPCH01M10/052H01M10/0562H01M10/0565B60L58/10H01M10/056H01M2300/0025H01M2300/0065H01M2300/0085Y02E60/10Y02T10/70H01M50/469H01M50/434H01M50/489H01M10/0525H01M2220/20H01M2220/30H02J7/0068
Inventor 八田一人镜庆一下坂畅明小野敏嗣古贺景三
Owner MURATA MFG CO LTD
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