Electrochemical device

An electrochemical and device technology, applied in the field of electrochemical devices, can solve problems such as introduction of electrolyte, decrease in charge and discharge characteristics, and inability to eliminate the decrease in electrolyte volume, and achieve the effect of ensuring productivity and preventing overflow.

Inactive Publication Date: 2015-02-25
SAMSSIN DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the part of the separator protruding outward from the two electrode sheets is the same as the thickness of the part sandwiched by the two electrode sheets, and the degree of liquid absorption is also the same. Immediately introduce the electrolyte into the part sandwiched by the two electrode sheets
In addition, it also interacts with the amount of electrolyte solution impregnated in the part protruding outward from the two electrode sheets in a small amount. When the above phenomenon occurs repeatedly, the gap in the amount of electrolyte solution in the part sandwiched by the two electrode sheets of the separator cannot be eliminated. Decrease, the accumulation of this phenomenon leads to a decrease in charge and discharge characteristics

Method used

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Experimental program
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no. 1 approach

[0049] Figure 1 to Figure 5 An electrochemical device according to the first embodiment of the present invention is shown. figure 1 and figure 2 The illustrated electrochemical device 100 includes a case 11 , a cover 12 , an electrical storage element 13 , a positive terminal 14 , a negative terminal 15 , a positive wiring 16 , and a negative wiring 17 .

[0050]

[0051] The casing 11 is made of an insulating material such as alumina, and is formed in a rectangular parallelepiped shape having a predetermined length, width, and height. Further, on the upper surface of the case 11, a concave portion 11a having a rectangular planar outline and an opening having a predetermined depth is formed. That is, the housing 11 has an opening of the recess 11a on its upper surface, and its lower surface is used as a mounting surface. In addition, at the four corners of the housing 11 viewed from above, notches 11b are formed in the up-down direction in which the plan view outline fo...

no. 2 approach

[0109] Figure 7 An electrochemical device according to a second embodiment of the present invention is shown. In the electrochemical device 200 of this embodiment, the structure of the separator 132c is different from that of the first embodiment described above. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations that are the same as those in the above-mentioned embodiment will be assigned the same reference numerals, and the description will be omitted or simplified.

[0110] The spacer 132c of this embodiment includes: a high liquid absorption portion (first part) 13c1 arranged on the two electrode sheets 13a and 13b, and a low liquid absorption portion (second portion) extending outward from the two electrode sheets 13a and 13b. ) 13c2, a contact portion (third portion) 13c3 provided on the surface area of ​​the low liquid absorption portion 13c2 close to the surface area of ​​the first electrode sheet 13a...

no. 3 approach

[0115] Figure 8 An electrochemical device according to a third embodiment of the present invention is shown. In the electrochemical device 300 of this embodiment, the structure of the separator 133c is different from that of the first embodiment described above. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations that are the same as those in the above-mentioned embodiment will be assigned the same reference numerals to omit or simplify their description.

[0116] The spacer 133c of this embodiment includes: a high liquid absorption portion (first part) 13c1 arranged on the two electrode sheets 13a and 13b, and a low liquid absorption portion (second portion) extending outward from the two electrode sheets 13a and 13b. ) 13c2, a contact portion (third portion) 13c3 respectively provided on the surface area of ​​the first electrode sheet 13a close to the low liquid absorption portion 13c2 and the surface area c...

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Abstract

The invention provides an electrochemical device which is capable of quickly and surely eliminating a phenomenon of electrolyte solution decrease in a portion of a separation sheet, said portion being sandwiched between two electrode sheets, even if the phenomenon occurs frequently. An electrochemical device (100) is provided with an electricity storage element (13) that is configured of a first electrode sheet (13a), a second electrode sheet (13b) and a separation sheet (131c) that is interposed between the electrode sheets (13a, 13b). The separation sheet (131c) comprises: a first portion (a high liquid absorption part) (13c1) that is sandwiched between the electrode sheets (13a, 13b); a second portion (a low liquid absorption part) (13c2) that protrudes from the electrode sheets (13a, 13b), while being out of contact with a lid (12); and a third portion (a contact part) (13c3) that is in contact with an edge surface (13b3) of the second electrode sheet (13b).

Description

technical field [0001] The present invention relates to an electrochemical device enclosing a chargeable and dischargeable energy storage element. Background technique [0002] Electronic devices such as mobile phones, notebook computers, video cameras, and digital cameras use surface-mountable electrochemical devices such as electric double layer capacitors or lithium-ion batteries as power sources suitable for storage and backup purposes. [0003] The electrochemical device generally includes: an insulating case having a concave portion opened on the upper surface, a conductive cover that seals the concave portion of the casing watertightly and airtightly, an electric storage element capable of charging and discharging enclosed in the closed concave portion, and Electrolyte solution, positive terminal and negative terminal provided on the mounting surface of the case, positive wiring for electrically connecting the positive terminal and the positive side of the storage ele...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01G11/52H01G9/08H01G11/00H01M2/02H01M2/14H01M10/04H01M50/406H01M50/463
CPCH01G11/52H01M50/463H01M50/406Y02E60/10H01M50/103Y02P70/50H01G9/145H01M50/40H01M2220/30Y02E60/13
Inventor真野响太郎萩原直人
OwnerSAMSSIN DEVICE CO LTD