Unlock instant, AI-driven research and patent intelligence for your innovation.

Secondary battery

A secondary battery, electrolyte technology, applied in secondary batteries, battery pack parts, battery boxes/jackets, etc., can solve problems such as reduced life characteristics or reliability, reduced battery life, internal short circuits, etc., to improve the cycle. Features, easy price reduction, effect of suppressing internal short circuits

Inactive Publication Date: 2011-10-19
SEKISUI CHEM CO LTD +1
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned lithium ion secondary battery, due to expansion and contraction of the active material layer during charge and discharge, etc., the active material is peeled off or falls off from the active material layer, thereby causing an internal short circuit.
In this way, the occurrence of the internal short-circuit causes a disadvantage that the life of the battery is reduced.
This causes the problem of degradation in life characteristics or reliability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Secondary battery
  • Secondary battery
  • Secondary battery

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0167] figure 1 and figure 2 It is an exploded perspective view of the lithium ion secondary battery according to the first embodiment of the present invention. image 3 It is an overall perspective view of the lithium ion secondary battery according to the first embodiment of the present invention. Figure 4 It is a plan view of the lithium ion secondary battery according to the first embodiment of the present invention. Figure 5 ~ Figure 16 It is a figure for demonstrating the lithium ion secondary battery of 1st Embodiment of this invention. It should be noted, Figure 4 In the drawing, the originally provided sealing plate 80 is removed for drawing so that the inside of the lithium ion secondary battery can be seen clearly. First, refer to Figure 1 to Figure 16 The lithium ion secondary battery 100 according to the first embodiment of the present invention will be described.

[0168] The lithium ion secondary battery 100 of the first embodiment, such as Figure 1...

no. 2 Embodiment approach

[0234] Figure 17 It is an exploded perspective view of a lithium ion secondary battery according to a second embodiment of the present invention. Figure 18 It is a plan view of the lithium ion secondary battery of the second embodiment of the present invention. Figure 19 It is a cross-sectional view schematically showing a lithium ion secondary battery according to a second embodiment of the present invention. Figure 20 ~ Figure 22 It is a figure for demonstrating the lithium ion secondary battery of 2nd Embodiment of this invention. Below, refer to Figure 7 , Figure 9 and Figure 17 ~ Figure 22 , the lithium ion secondary battery 200 according to the second embodiment of the present invention will be described. It should be noted that, in each figure, corresponding components are given the same reference numerals, and duplicative descriptions are appropriately omitted.

[0235] The lithium ion secondary battery 200 of the second embodiment, such as Figure 17 As ...

no. 3 Embodiment approach

[0244] Figure 23 It is an exploded perspective view of a lithium ion secondary battery according to a third embodiment of the present invention. Figure 24 It is an overall perspective view of a lithium ion secondary battery according to a third embodiment of the present invention. Figure 25 ~ Figure 28 It is a figure for demonstrating the lithium ion secondary battery of 3rd Embodiment of this invention. Below, refer to Figure 7 , Figure 9 and Figure 23 ~ Figure 28 , the lithium ion secondary battery 300 according to the third embodiment of the present invention will be described. It should be noted that, in each figure, corresponding components are given the same reference numerals, and duplicative descriptions are appropriately omitted.

[0245] The lithium ion secondary battery 300 of the third embodiment is as Figure 23 As shown, unlike the first and second embodiments described above, a plurality of (two) convex portions 310 are formed on the panel portion 81...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is a reliable secondary battery with improved life characteristics. The lithium-ion secondary battery (secondary battery) has: a positive electrode which includes a positive electrode active material layer; a negative electrode which includes a negative electrode active material layer and which is arranged to face the positive electrode; a housing container in which the positive and negative electrodes are housed; and a lid member which seals the opening of the housing container. The positive and negative electrodes have edge portions respectively, and are housed in the housing container with a pressing force applied to a region of the positive and negative electrode active material layers excluding at least part of the edge portions.

Description

technical field [0001] The present invention relates to secondary batteries. Background technique [0002] In recent years, with the rapid miniaturization, weight reduction and multi-functionalization of civilian mobile phones, portable electronic devices, and portable information terminals, there is a strong demand for the development of small, light-weight, high-energy-density batteries that can be repeatedly charged and discharged for a long time as their power sources. secondary battery. As a secondary battery that satisfies these requirements, a lithium ion secondary battery having a higher energy density than other secondary batteries is most expected, and various researches are being pursued to develop a better lithium ion secondary battery. [0003] In addition, in recent years, in view of environmental problems such as global warming, lithium-ion secondary batteries have begun to be used for power storage. Furthermore, as a reduction in carbon dioxide (CO 2 ) or ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/056H01M50/103H01M50/119H01M50/121H01M50/124H01M50/15H01M50/159H01M50/164H01M50/627
CPCH01M4/13H01M10/0481H01M10/0525H01M10/0585Y02E60/10H01M50/124Y02P70/50H01M50/121H01M50/627H01M50/15H01M50/159H01M50/103H01M50/119H01M50/164B30B7/02
Inventor 佃至弘
Owner SEKISUI CHEM CO LTD