CN217114441U

CN217114441U - Battery cathode structure and battery thereof

Info

Publication number: CN217114441U
Application number: CN202220774024.2U
Authority: CN
Inventors: 魏春光; 吴晋; 梁燕
Original assignee: Shenzhen Cubic Science Co ltd
Current assignee: Shenzhen Cubic Science Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-08-02
Anticipated expiration: 2032-04-06

Abstract

The utility model discloses a battery cathode structure and a battery thereof, which comprises a cathode body, a connecting piece connected with the cathode body, and cathode lugs arranged on the connecting piece; the negative electrode body is of a structure made of a hard carbon graphite composite material, the connecting piece is provided with a plurality of protruding marks and dents which are arranged in the protruding marks in a staggered mode, and the protruding marks and the dents are connected with the inner wall of the battery shell. Adopt the structure of this application, the negative pole body is the structure that hard carbon graphite combined material made, and the connection piece is equipped with a plurality of protruding marks, crisscross the dent that sets up in a plurality of protruding marks, protruding mark, dent and battery shell inner wall connection, and this kind of connected mode has increased the area of contact of negative pole structure and shells inner wall, has reduced the internal resistance of battery negative pole structure, has prevented to a certain extent that battery negative pole structure heaies up in the use, has reduced the potential safety hazard of battery charge-discharge in-process.

Description

Battery cathode structure and battery thereof

Technical Field

The utility model relates to a battery technology field especially relates to a battery negative pole structure and battery thereof.

Background

In the current technology, a "lithium battery" is a battery using a non-aqueous electrolyte solution and using lithium metal or lithium alloy as a positive/negative electrode material, the lithium metal battery was originally proposed and researched by Gilbert n. Lewis in 1912, and in the 70 th century, the lithium ion battery was proposed and researched by m. s.whittingham, because the chemical properties of lithium metal are very active, the requirements on the environment for processing, storing and using lithium metal are very high, and the lithium battery has become the mainstream with the development of scientific technology.

At present, a lithium battery is gradually a necessity in life, and many electric devices need the lithium battery, but many problems occur in the use process of the lithium battery, and the alternating current internal resistance (ACR) and the direct current internal resistance (DCR) of the existing battery are large, so that the temperature is obviously increased in the charging and discharging process, and spontaneous combustion is easy.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Disclosure of Invention

In order to satisfy the above requirements, a first object of the present invention is to provide a battery cathode structure.

A second object of the present invention is to provide a battery.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a battery cathode structure comprises a cathode body, a connecting sheet connected with the cathode body and a cathode lug arranged on the connecting sheet;

the negative electrode body is of a structure made of a hard carbon graphite composite material, the connecting piece is provided with a plurality of protruding marks and dents which are arranged in the protruding marks in a staggered mode, and the protruding marks and the dents are connected with the inner wall of the battery shell.

In one embodiment, the connecting sheet is provided with a groove on the other side of the convex mark.

In one embodiment, the connecting piece is provided with a convex mark on the other side of the dent.

In one embodiment, the raised marks are arranged in a row and N columns, where N is an integer greater than 2.

In one embodiment, the convex marks and the concave marks are arranged in a staggered manner.

In one embodiment, the connecting piece is a foil made of copper or aluminum material.

On the other hand, the application provides a battery, including casing and any one of the above-mentioned battery negative pole structure, the casing is inside to be equipped with diaphragm, positive pole, the diaphragm parcel the positive pole, the negative pole body pastes tightly in the surface of diaphragm.

In one embodiment, the device further comprises a cover plate.

In one embodiment, the battery further comprises a positive pole, and the cover plate is provided with a through hole.

In one embodiment, the positive electrode is made of carbon fluoride.

Compared with the prior art, the beneficial effects of the utility model reside in that: adopt the structure of this application, the negative pole body is the structure that hard carbon graphite combined material made, because hard carbon graphite combined material has good heat conductivity, the heat on the better reduction battery guarantees that the battery carries out normal storage to the electric energy, has prolonged the life of lithium cell. And the connecting sheet is provided with a plurality of convex marks and indents which are arranged on the plurality of convex marks in a staggered manner, and the convex marks and the indents are connected with the inner wall of the battery shell, so that the contact area between the cathode structure and the inner wall of the shell is increased, the internal resistance of the cathode structure of the battery is reduced, the temperature rise of the cathode structure of the battery in the using process is prevented to a certain extent, and the potential safety hazard of the battery in the charging and discharging process is reduced.

The invention is further described with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic axial view of a negative electrode structure of a battery according to the present invention;

FIG. 2 is a front diagrammatic view of the arrangement of FIG. 1;

FIG. 3 is a schematic view of the structure of the connecting sheet of FIG. 1;

fig. 4 is a schematic view of another embodiment of the connecting tab of fig. 1.

Reference numerals

101 negative pole body 102 connection piece

103 negative electrode tab 104 convex mark

105 indent 106 groove

107 convex marks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

As shown in fig. 1-4, the present application provides a battery negative electrode structure, which includes a negative electrode body 101, a connecting piece 102 connected to the negative electrode body 101, and a negative electrode tab 103 disposed on the connecting piece 102; the negative electrode body 101 is a structure made of a hard carbon graphite composite material, the connecting sheet 102 is provided with a plurality of protruding marks 104 and dents 105 which are arranged on the plurality of protruding marks 104 in a staggered mode, and the protruding marks 104 and the dents 105 are connected with the inner wall of the battery shell. Correspondingly, battery shell inner wall sets up dent and convex mark to realize the cooperation, and make a plurality of convex marks 104, dent 105 all laminate in shells inner wall, increased negative pole structure and shells inner wall's area of contact, reduced the internal resistance of battery negative pole structure, greatly prevented the intensification of battery negative pole structure in the use, reduced the potential safety hazard of battery charge-discharge in-process.

In one embodiment, as shown in fig. 4, when the connecting piece 102 adopts a pre-formed main body structure and the dent 105 and the protruding mark 104 are post-processed, the connecting piece 102 is provided with a groove 106 on the other side of the protruding mark 104, and the connecting piece 102 is provided with a protruding mark 107 on the other side of the dent 105, wherein the process can be obtained by pressure forming, so that the dent 105 corresponds to the protruding mark 107 and the protruding mark 104 corresponds to the groove 106.

In another embodiment, as shown in fig. 3, the connecting tab 102 is made by pouring liquefied metal into a mold.

In one embodiment, the raised marks 104 are arranged in a row and N columns, where N is an integer greater than 2. The convex marks 104 and the concave marks 105 are arranged in a staggered manner.

In one embodiment, the connecting sheet 102 is a foil made of copper or aluminum material, specifically, the copper foil has good conductivity and can rapidly form an oxidation protection film, the negative electrode body 101 is connected to the inner wall of the casing through the connecting sheet 102, the connecting sheet 102 rapidly forms the oxidation protection film to facilitate the connection with the inner wall of the casing, and the manufacturing process of the copper foil is mature and cheap.

On the other hand, the application provides a battery, including casing and the battery negative pole structure, apron, the anodal utmost point post of above-mentioned arbitrary, the casing is inside to be equipped with diaphragm, anodal, and the diaphragm wraps up anodal, and the negative pole body pastes in the surface of diaphragm tightly.

In one embodiment, the cover plate has a through hole, and the positive electrode is made of carbon fluoride. The battery of this embodiment is one kind of circular lithium cell, pastes the battery negative pole structure on the inner wall of stainless steel, nickel-plated steel, aluminium and titanium or titanium alloy shell, through isolated positive pole and negative pole of diaphragm bag, and it has electrolyte to fill in the casing for the ion between transmission positive pole and the negative pole makes the battery can normally carry out charge-discharge work.

Various other modifications and changes can be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the protection scope of the present invention.

Claims

1. A battery cathode structure is characterized by comprising a cathode body, a connecting piece connected with the cathode body and a cathode lug arranged on the connecting piece;

2. The battery negative electrode structure of claim 1, wherein the connecting sheet is provided with a groove on the other side of the convex mark.

3. The battery negative electrode structure of claim 1, wherein the connecting tab is provided with a convex mark on the other side of the dent.

4. The battery anode structure of claim 1, wherein the raised indentations are arranged in N rows and N columns, where N is an integer greater than 2.

5. The battery negative electrode structure of claim 1, wherein the convex marks and the concave marks are arranged in a staggered manner.

6. The battery negative electrode structure of claim 1, wherein the connecting tab is a foil made of a copper or aluminum material.

7. A battery, characterized in that, including the negative pole structure of battery of any claim 1 to 6 and the casing, be equipped with diaphragm, positive pole in the casing inside, the diaphragm wraps up the positive pole, the negative pole body is hugged closely in the surface of diaphragm.

8. The battery of claim 7, further comprising a cover plate.

9. The battery of claim 8, further comprising a positive electrode post, wherein the cover plate is provided with a through hole.

10. The battery according to claim 9, wherein the positive electrode is made of carbon fluoride.