CN-122000209-A - Super capacitor cell and capacitor

CN122000209ACN 122000209 ACN122000209 ACN 122000209ACN-122000209-A

Abstract

The invention discloses a super capacitor cell and a capacitor, wherein the cell comprises inner electrolytic paper, positive electrode aluminum foil, middle electrolytic paper and negative electrode aluminum foil, the positive electrode aluminum foil comprises positive electrode base aluminum foil and positive electrode pure aluminum layer, the negative electrode aluminum foil comprises negative electrode base aluminum foil and negative electrode pure aluminum layer, the extending directions of the positive electrode pure aluminum layer and the negative electrode pure aluminum layer are opposite, the thickness of the positive electrode base aluminum foil is larger than that of the positive electrode pure aluminum layer, and/or the thickness of the negative electrode base aluminum foil is larger than that of the negative electrode pure aluminum layer. The super capacitor cell and the capacitor can greatly improve the current carrying capacity of current and the charge and discharge functions of the capacitor, so that the safety performance of the capacitor in heavy-load situations of frequent rapid acceleration and energy recovery is improved.

Inventors

YIN ZHIHUA
LI LIANG
YIN CHAO

Assignees

深圳江浩电子有限公司

Dates

Publication Date: 20260508
Application Date: 20251215

Claims (10)

1. A super capacitor cell is characterized by comprising inner electrolytic paper, positive electrode aluminum foil, middle electrolytic paper and negative electrode aluminum foil, wherein the positive electrode aluminum foil comprises a positive electrode base layer aluminum foil and a positive electrode pure aluminum layer extending from one longitudinal end edge of the positive electrode base layer aluminum foil, the negative electrode aluminum foil comprises a negative electrode base layer aluminum foil and a negative electrode pure aluminum layer extending from one longitudinal end edge of the negative electrode base layer aluminum foil, the thickness of the positive electrode pure aluminum layer and/or the negative electrode pure aluminum layer is 30-50 mu m, the aluminum purity is 99.999% or more, the extending directions of the positive electrode pure aluminum layer and the negative electrode pure aluminum layer are opposite, the thickness of the positive electrode base layer aluminum foil is larger than the thickness of the positive electrode pure aluminum layer, and/or the thickness of the negative electrode base layer aluminum foil is larger than the thickness of the negative electrode pure aluminum layer.
2. The supercapacitor cell of claim 1, wherein the inner layer of electrolytic paper, the anode aluminum foil, the middle layer of electrolytic paper, and the cathode aluminum foil are wound together, wherein one end of the cell is a wound multilayer anode pure aluminum layer and the other end is a wound multilayer cathode pure aluminum layer.
3. The supercapacitor cell of claim 2, wherein the outer surface of the wound cell is a positive aluminum foil layer, a ring of electrolytic paper layers and a ring of negative pure aluminum layers.
4. The supercapacitor cell of claim 2, wherein one end of the cell leads to the positive electrode of the capacitor and the other end leads to the negative electrode of the capacitor.
5. A capacitor is characterized by comprising the battery cell of any one of claims 1-4, an aluminum shell for accommodating the battery cell, and a terminal cover plate assembly for packaging the battery cell in the aluminum shell.
6. The capacitor of claim 5 wherein the terminal cover assembly comprises a cover body, a bolt conductive post and an explosion-proof valve mounted on the cover body, an anchor, and a rubber ring disposed between the anchor and the cover body.
7. The capacitor of claim 6, wherein the anchor is electrically connected to the aluminum housing to provide a positive or negative electrode of the capacitor.
8. The capacitor of claim 6 wherein the cover plate body has a three-stage frustoconical shape comprising a first frustoconical surface, a second frustoconical surface, and a third frustoconical surface.
9. The capacitor of claim 8 wherein the stud conductive post is provided with an annular boss comprising a first boss, a second boss, and a third boss.
10. The capacitor of claim 6, wherein the bolt conductive post is provided with a screw hole in the center axial direction, and an inner wall of the screw hole is provided with an inner thread for connecting with an external stud.

Description

Super capacitor cell and capacitor Technical Field The invention belongs to the technical field of electronic devices, and particularly relates to a super capacitor cell and a capacitor. Background At present, in the light-load field such as computer data storage power supply, low-voltage energy feeding, instrument and meter data safety, power supply filtering below 48V and the like, the traditional super capacitor is widely applied because of the advantages of high charge and discharge speed, long cycle life and the like. However, with the development of new energy sources, smart grids, large industrial equipment and the like, extremely high requirements are put on the instantaneous power output capacity of an energy storage device, namely, a super capacitor capable of bearing hundreds of amperes or even thousands of amperes of instantaneous current is needed, so that in the fields of high-power energy feeding, energy storage and power supply, the traditional super capacitor is not ideal in performance, and the discharge current is small, particularly, under the condition that the charging and discharging life of a string is 50 ten thousand times and the single body is discharged 100 ten thousand times, the whole super capacitor cannot be well utilized. The battery cell is taken as an important component of the capacitor, the influence on the performance of the capacitor is very large, on a new energy automobile, the defects of the traditional super capacitor battery cell are more remarkable under the heavy-load scene of frequent rapid acceleration and energy recovery, the capacitor manufactured by the traditional super capacitor battery cell can not meet the requirements of the new energy automobile, and therefore development and research are needed to be carried out in order to provide a solution of the super capacitor battery cell, and the heavy-load charging and discharging scene of the new energy automobile and the like can be met. The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present application and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application. Disclosure of Invention The invention aims to provide a super capacitor cell and a capacitor, which are used for solving at least one of the problems in the background technology. In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows: the super capacitor cell comprises inner-layer electrolytic paper, positive electrode aluminum foil, middle-layer electrolytic paper and negative electrode aluminum foil, wherein the positive electrode aluminum foil comprises a positive electrode base layer aluminum foil and a positive electrode pure aluminum layer extending from one longitudinal end edge of the positive electrode base layer aluminum foil, the negative electrode aluminum foil comprises a negative electrode base layer aluminum foil and a negative electrode pure aluminum layer extending from one longitudinal end edge of the negative electrode base layer aluminum foil, the thickness of the positive electrode pure aluminum layer and/or the negative electrode pure aluminum layer is 30-50 mu m, the aluminum purity is 99.999% or more, the extending directions of the positive electrode pure aluminum layer and the negative electrode pure aluminum layer are opposite, the thickness of the positive electrode base layer aluminum foil is larger than the thickness of the positive electrode pure aluminum layer, and/or the thickness of the negative electrode base layer aluminum foil is larger than the thickness of the negative electrode pure aluminum layer. In some embodiments, the inner layer electrolytic paper, the positive electrode aluminum foil, the middle layer electrolytic paper and the negative electrode aluminum foil are wound together, wherein one end of the battery cell is a wound multi-layer positive electrode pure aluminum layer, and the other end of the battery cell is a wound multi-layer negative electrode pure aluminum layer. In some embodiments, the outer surface of the wound cell is a positive aluminum foil layer, a ring of electrolytic paper layers and a ring of negative pure aluminum layers. In some embodiments, one end of the cell leads to the positive electrode of the capacitor and the other end leads to the negative electrode of the capacitor. Another technical scheme of the invention is a capacitor, which comprises the battery cell according to any one of the embodiments of the preceding technical scheme, an aluminum case for accommodating the battery cell, and a terminal cover plate assembly for packaging the battery cell in the aluminum case. In some embodi