CN216120626U

CN216120626U - Separator structure for three-electrode battery

Info

Publication number: CN216120626U
Application number: CN202122408008.XU
Authority: CN
Inventors: 徐亚杰; 王茂范; 胡伟东; 胡朝帅
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-03-22
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to a diaphragm structure for a three-electrode battery, which comprises a diaphragm body and a packaging part packaged outside the diaphragm body on the whole structure, wherein protective gas is filled in the packaging part; the diaphragm body is provided with a copper base body, the copper base body is provided with an electric connection end extending out of one side of the diaphragm body, and the diaphragm body is provided with a connection part which can be connected with a diaphragm of the three-electrode battery. According to the diaphragm structure for the three-electrode battery, the sealing part is arranged on the diaphragm body, and the protective gas is filled in the sealing part, so that the sealing part is isolated from the outside to form a sealing space; the diaphragm body is provided with a copper matrix, and the copper matrix is provided with an extended electric connection end so as to be convenient for direct test with external voltage acquisition equipment; in addition, the diaphragm body is provided with a connecting part for connecting the diaphragm of the three-electrode battery, so that the diaphragm structure can be conveniently implanted into the battery.

Description

Separator structure for three-electrode battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a diaphragm structure for a three-electrode battery.

Background

The three-electrode lithium battery refers to a lithium battery implanted with a third electrode as a reference electrode, and the three-electrode lithium battery is mainly manufactured by hand at present. When the copper wire serving as the third electrode is treated, the superfine copper wire is very easy to break in the operation process, so that a lot of time is needed in the manufacturing process, and the surface of the copper wire needs to be soaked in concentrated sulfuric acid for insulating coating. After the copper wires are washed, the treated copper wires can be buried into the middle of the pole group one by one, and in order to prevent the copper wires from moving and being entangled with each other, an additional adhesive tape is needed for fixing. Because there is no clear standard for operation and evaluation, the manner of manually implanting the reference electrode, the differences in the materials used, and the different understanding of the three electrodes by the manufacturer, the three-electrode lithium battery cannot have high consistency, and because of the differences, it is difficult to compare the measurement results in the transverse direction.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a separator structure for a three-electrode lithium battery, so as to achieve rapid manufacturing of the three-electrode lithium battery and improve consistency of the produced products.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a diaphragm structure for a three-electrode battery comprises a diaphragm body and a packaging part packaged outside the diaphragm body, wherein protective gas is filled in the packaging part;

the diaphragm body is provided with a copper base body, the copper base body is provided with an electric connection end extending out of one side of the diaphragm body, and the diaphragm body is provided with a connection part which can be connected with a diaphragm of the three-electrode battery.

Further, the connecting part is a double-sided adhesive tape adhered to the diaphragm body;

the copper substrate is a copper wire which is bonded on the diaphragm body through the double faced adhesive tape.

Furthermore, the copper wires are arranged on the diaphragm body at intervals;

one end of each copper wire extends out of one side of the diaphragm body, and the extending ends of the copper wires are bent to be gathered together to form the electric connection end.

Furthermore, a plurality of copper wires are uniformly arranged.

Furthermore, the double-sided adhesive tapes are at least two arranged at two ends of the diaphragm body respectively.

Further, the electrical connection end is located in the middle of the diaphragm body.

Furthermore, an insulating protective layer is coated outside the electric connection end.

Further, the diaphragm body is rectangular.

Further, the protective gas is nitrogen.

Furthermore, the diaphragm body is made of PP or PE materials.

Compared with the prior art, the utility model has the following advantages:

(1) according to the diaphragm structure for the three-electrode battery, the sealing part is arranged on the diaphragm body, and the protective gas is filled in the sealing part, so that the sealing part is isolated from the outside to form a sealing space; the diaphragm body is provided with a copper matrix, and the copper matrix is provided with an extended electric connection end so as to be convenient for direct test with external voltage acquisition equipment; in addition, the diaphragm body is provided with a connecting part for connecting the diaphragm of the three-electrode battery, so that the diaphragm structure can be conveniently implanted into the battery.

(2) The connecting part is provided with double-sided adhesive tape, not only can fix the copper matrix on the diaphragm body, but also can realize the connection between the diaphragm body and the battery diaphragm, has simple structure and convenient operation,

(3) the copper base member sets up to the copper wire, and the copper wire is a plurality of that the interval set up, and mutual independence contactless between the copper wire can avoid it to take place to buckle and break off, and evenly arranges between a plurality of copper wires to realize the location measurement.

(4) The double faced adhesive tape is at least arranged at two ends of the diaphragm body, so that the two ends of the copper wires can be fixed simultaneously, and the position between the copper wires is ensured to be fixed.

(5) The electric connection end is coated with an insulating protective layer to protect the electric connection end.

(6) The protective gas is nitrogen, and the chemical inertia of the nitrogen is utilized to realize the separation of the inner space and the outer space of the diaphragm body.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view of a separator structure for a three-electrode battery according to an embodiment of the present invention;

fig. 2 is an exploded perspective view of a separator structure for a three-electrode battery according to an embodiment of the present invention;

figure 3 is a schematic structural view of a septum body according to an embodiment of the utility model;

figure 4 is an exploded view of a septum body according to an embodiment of the utility model.

Description of reference numerals:

1. a septum body; 2. a copper wire; 21. an electrical connection terminal; 3. a connecting portion; 4. a packaging section; 5. and an insulating protective layer.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are to be construed as indicating or implying any particular importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The diaphragm structure for the three-electrode battery of the embodiment comprises a diaphragm body 1 and a packaging part 4 packaged outside the diaphragm body 1, wherein the packaging part 4 is filled with protective gas. Wherein, the diaphragm body 1 is provided with a copper matrix, the copper matrix is provided with an electric connection end 21 extending to one side of the diaphragm body 1, and the diaphragm body 1 is provided with a connection part 3 which can be connected with the diaphragm of the three-electrode battery.

The diaphragm structure for the three-electrode battery of the embodiment is isolated from the outside by arranging the packaging part 4 on the diaphragm body 1 and filling the protection gas, so that a sealed space is formed. The diaphragm body 1 is provided with a copper matrix, and the copper matrix is provided with an extended electric connection end 21 so as to be convenient for direct test with external voltage acquisition equipment; in addition, the connecting part 3 for connecting the separator of the three-electrode battery is arranged on the separator body 1, so that the separator structure can be conveniently implanted into the battery.

Based on the above overall design structure, a specific exemplary structure of the separator structure for a three-electrode battery of the present embodiment is shown in fig. 1 and 2, wherein the separator structure of the present embodiment is suitable for three-electrode implantation of a cylindrical, square hard-shell, soft-package lithium battery. In this embodiment, as shown in fig. 2, the sealing portion 4 is of an adhesive film structure, and the adhesive film has a simple structure, a small size, and a small occupied area, so as to avoid the over-thickness of the whole diaphragm structure.

The inside protective gas that is filled with of above-mentioned encapsulation portion 4 to realize the wall in the interior outer space of diaphragm body 1, wherein for realizing better protection effect, protective gas specifically is nitrogen gas (not shown in the figure), the chemical inertness of usable nitrogen gas itself, so that diaphragm body 1 is inside to form independent space, is convenient for avoid the consumption of copper base member to active lithium. In this embodiment, for the appearance structure of adaptation battery, the rectangle is adopted to the appearance of above-mentioned diaphragm body 1, and diaphragm body 1 adopts PP or PE material to make to can tailor diaphragm body 1 according to the size model of the user demand of oneself and battery when using.

With reference to fig. 3 and 4, in this embodiment, the copper substrate is provided with copper wires 2, so as to avoid the occurrence of bending and breaking of the copper wires 2, the copper wires 2 are spaced apart from each other and are disposed on the diaphragm body 1, and the copper wires 2 are uniformly arranged, so that the copper wires 2 are independent from each other and do not contact each other, and therefore positioning measurement is performed, voltage data of each individual copper wire 2 are collected and analyzed in sequence, and the position of lithium analysis can be located by locating the position of the copper wire 2. Wherein, the one end of copper wire 2 all stretches out in diaphragm body 1's one side, and the overhanging one end of each copper wire 2 is buckled and is gathered together, forms above-mentioned electric connection end 21, and this electric connection end 21 is located diaphragm body 1's middle part, and the external voltage acquisition equipment of this electric connection end 21 of accessible is convenient for test.

In the embodiment, in order to protect the electric connection end 21 of the copper wire 2, the electric connection end 21 is covered with the insulating protection layer 5. As shown in fig. 3, the insulating protection layer 5 of the present embodiment adopts a film structure such as an insulating film, which has a small volume and a small occupied space, and is convenient for insulating and protecting the battery when the battery is used; meanwhile, when the test is prepared, the test board is convenient to lead out, the operation is simple, and the time is saved.

In this embodiment, for fixing the position of the copper wire 2, the connecting portion 3 is a double-sided adhesive tape adhered to the diaphragm body 1, one side of the double-sided adhesive tape is adhered to the diaphragm body 1, and the other side of the double-sided adhesive tape does not uncover the protective layer, so that the copper wire 2 inside the diaphragm body 1 can be fixed at the same time when the diaphragm structure is not used, the copper wire 2 is prevented from being bent and broken, and meanwhile, the diaphragm body 1 is effectively prevented from being polluted.

As a preferred embodiment, in this embodiment, as shown in fig. 3 and 4, the two double-sided tapes are disposed at least at two ends of the diaphragm body 1, and the positions of the two double-sided tapes are disposed at the same side of the diaphragm body 1, so as to fix the positions of the upper edge and the lower edge of the copper wire 2. In order to achieve a better fixing effect, the double-faced adhesive tape can be further arranged in a plurality of positions, the double-faced adhesive tape is also arranged in the middle of the copper wire 2, and the copper wire 2 is better fixed.

In addition, in this embodiment, the two double-sided tapes have different width sizes, and because the middle and lower sections of the copper wires 2 are arranged in parallel, the double-sided tape used for fixing the lower ends of the copper wires 2 can be one of the double-sided tapes with a narrow size, so that the use of the double-sided tape can be saved. Of course, the double-sided adhesive tape with the same size can be used for fixing the two ends of the copper wire 2, and the size and the use position of the double-sided adhesive tape are not limited.

When the diaphragm structure for the three-electrode battery is used, the adhesive film is firstly torn, the diaphragm body 1 is taken out, then the protective layers of the double-sided adhesive tapes at the upper end and the lower end of the diaphragm body 1 are removed, and then the diaphragm body 1 is bonded to the position of the battery diaphragm, where three electrodes need to be implanted, through the double-sided adhesive tapes. And then, manufacturing the battery according to a normal manufacturing flow to obtain the three-electrode battery, wherein when the battery is tested, an opening can be formed in advance in a position such as a cover plate or an explosion-proof valve of the battery to lead out an electric connection end 21, and after the insulating protection layer 5 is torn off, external collection equipment can be connected to test the battery.

The diaphragm structure for the three-electrode battery can be directly implanted into the battery in the process of manufacturing the battery by adopting the structure, so that the manufacturing speed of the three-electrode battery can be greatly increased, the consistency can be improved, and a better using effect can be achieved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A separator structure for a three-electrode battery, characterized by: the diaphragm comprises a diaphragm body (1) and a packaging part (4) packaged outside the diaphragm body (1), wherein protective gas is filled in the packaging part (4);

the diaphragm body (1) is provided with a copper base body, the copper base body is provided with an electric connection end (21) extending out of one side of the diaphragm body (1), and the diaphragm body (1) is provided with a connecting part (3) which can be connected with a diaphragm of the three-electrode battery.

2. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the connecting part (3) is a double-sided adhesive tape adhered to the diaphragm body (1);

the copper substrate is a copper wire (2) which is bonded on the diaphragm body (1) through the double faced adhesive tape.

3. The separator structure for a three-electrode battery according to claim 2, characterized in that:

the copper wires (2) are arranged on the diaphragm body (1) at intervals;

one end of each copper wire (2) extends out of one side of the diaphragm body (1), and the extending ends of the copper wires (2) are bent to be gathered together to form the electric connection end (21).

4. The separator structure for a three-electrode battery according to claim 2, characterized in that:

the plurality of copper wires (2) are uniformly arranged.

5. The separator structure for a three-electrode battery according to claim 2, characterized in that:

the double-sided adhesive tapes are at least two arranged at two ends of the diaphragm body (1).

6. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the electrical connection end (21) is located in the middle of the diaphragm body (1).

7. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the electric connection end (21) is coated with an insulating protection layer (5).

8. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the diaphragm body (1) is rectangular.

9. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the protective gas is nitrogen.

10. The separator structure for a three-electrode battery according to claim 1, characterized in that:

the diaphragm body (1) is made of PP or PE materials.