Button battery shell for preparing three-electrode battery

Abstract

The utility model relates to the technical field of batteries, in particular to a button battery case for preparing a three-electrode battery, which comprises a positive pole case, a negative pole case, an insulating ring and a reference electrode, a notch is arranged at the side part of the positive pole case, and one end of the reference electrode extends into the positive pole case through the notch and is used for being communicated with a diaphragm; the insulating ring is embedded into the inner side of the positive electrode shell and downwards abuts against the top of the reference electrode; the cathode shell is buckled at the top of the insulating ring; the utility model provides a button battery shell for preparing a three-electrode battery, which not only can shorten the manufacturing period of the three-electrode battery and reduce the requirements on manual skills, but also can improve the yield and reduce the material waste, and solves the problems of longer manufacturing period, lower yield and serious waste of the existing soft package type three-electrode battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a button cell shell for preparing three electrode battery. BACKGROUND

[0002] With the development of lithium battery technology, people pay more and more attention to the mechanism exploration, failure analysis and performance optimization of the battery, so as to need to prepare three electrode battery for in-depth understanding of the battery electrochemical reaction process.

[0003] Generally, three electrode battery is mostly made in the form of soft package battery, such as the three electrode battery disclosed in CN217405508U. When making, first, the pole piece is prepared into a bare battery cell through a laminating machine, second, the bare battery cell is manually disassembled and implanted with a treated copper wire, the copper wire is fixed with the diaphragm, then the bare battery cell is packaged, and the copper wire is led out, finally, the copper wire is welded with the pole lug into a reference electrode.

[0004] As the above technical scheme, the structure form of the existing soft package battery shell makes the three electrode battery production cycle relatively long, and has certain requirements for the personnel participating in the production, the yield is relatively low, and it is a waste, therefore, it is necessary to provide a button cell shell for preparing three electrode battery. SUMMARY

[0005] Therefore, the utility model provides a button cell shell for preparing three electrode battery, which can shorten the production cycle of three electrode battery, reduce the requirement for manual skill, improve the yield, reduce material waste, and solve the problems of long production cycle, low yield and serious waste of the existing soft package three electrode battery.

[0006] The technical scheme of the utility model is as follows:

[0007] The utility model provides a button cell shell for preparing three electrode battery, which comprises a positive shell, a negative shell, an insulating ring and a reference electrode, wherein,

[0008] The side of the positive shell is provided with a notch, one end of the reference electrode extends into the interior of the positive shell through the notch and is used for connecting the diaphragm;

[0009] The insulating ring is embedded in the inner side of the positive shell and abuts against the top of the reference electrode downward;

[0010] The negative shell is buckled on the top of the insulating ring.

[0011] On the basis of the above technical scheme, preferably, the positive shell, the negative shell and the insulating ring are coaxially arranged.

[0012] On the basis of the above technical scheme, preferably, a ring groove is arranged at the top of the insulating ring, wherein,

[0013] The lower end of the negative electrode shell is embedded in the ring groove.

[0014] On the basis of the above technical scheme, preferably, a positioning groove with an opening downward is arranged at the bottom of the insulating ring, wherein,

[0015] The reference electrode penetrates through the positioning groove, and the top of the reference electrode abuts against the groove bottom of the positioning groove.

[0016] On the basis of the above technical scheme, preferably, the insulating key is further included, wherein,

[0017] A flat key table is arranged at the side of the insulating ring, and an embedding groove is formed between the key table and the positive electrode shell, and the embedding groove is communicated with the notch;

[0018] One end of the insulating key is embedded in the embedding groove, and the other end is embedded in the notch, and the bottom of the insulating key abuts against the top of the reference electrode downward.

[0019] On the basis of the above technical scheme, preferably, the side end of the insulating key abuts against the key table.

[0020] On the basis of the above technical scheme, preferably, the end of the insulating key away from the key table is aligned with the outer side of the positive electrode shell.

[0021] On the basis of the above technical scheme, preferably, a matching groove with an opening downward is arranged at the bottom of the insulating key, wherein,

[0022] The reference electrode penetrates through the matching groove, and the top of the reference electrode abuts against the groove bottom of the matching groove.

[0023] On the basis of the above technical scheme, preferably, a sealing glue filling groove is formed between the inner side of the positive electrode shell and the outer side of the negative electrode shell and the top of the insulating ring.

[0024] On the basis of the above technical scheme, preferably, the copper wire is further included, wherein,

[0025] The copper wire is placed at the bottom of the inner side of the positive electrode shell;

[0026] One end of the copper wire is welded and fixed with one end of the reference electrode inserted into the inside of the positive electrode shell.

[0027] The button cell shell for preparing a three-electrode battery of the utility model has the following advantages

[0028] Beneficial effects:

[0029] (1) By setting the positive shell, negative shell, insulating ring and reference electrode, the structure is relatively simple, and it is convenient to provide convenience for the preparation of the three-electrode battery through the structure, compared with the structure form of the existing soft package type three-electrode battery, through the button cell shell to make the three-electrode battery, not only can shorten the production cycle, reduce the requirement for manual skill, but also can improve the yield, reduce material waste.

[0030] (2) By setting the notch and the positioning groove, the positioning and installation of the reference electrode are facilitated, and the manufacturing efficiency of the three-electrode battery is improved.

[0031] (3) By setting the insulating key and the matching groove, the reference electrode is conveniently fixed again, the stability of the reference electrode is improved, and meanwhile, the notch is sealed by the insulating key, so that the sealing performance of the side of the three-electrode battery is guaranteed.

[0032] (4) By setting the sealing glue filling groove, the sealing glue is filled for sealing, and the sealing performance of the top of the three-electrode battery is guaranteed.

[0033] (5) By setting the copper wire, the flexibility of the connection between the reference electrode and the diaphragm is improved, and the manufacturing efficiency of the three-electrode battery is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0035] Figure 1 It is a perspective view of a button cell shell for preparing a three-electrode battery of the present application;

[0036] Figure 2 It is a top view of a button cell shell for preparing a three-electrode battery of the present application;

[0037] Figure 3 It is a sectional view of A-A of the button cell shell for preparing a three-electrode battery of the present application; Figure 2

[0038] Figure 4 It is an exploded view of the button cell shell for preparing a three-electrode battery of the present application; Figure 1

[0039] Figure 5 It is a partial perspective view of the present application;

[0040] ​​In the figure: 1. Positive electrode shell; 2. Negative electrode shell; 3. Insulating ring; 4. Reference electrode; 5. Insulating key; 6. Copper wire; 101. Notch; 102. Groove; 103. Sealant filling groove; 301. Ring groove; 302. Positioning groove; 303. Keyway; 501. Mating groove. Detailed Implementation

[0041] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] like Figures 1-5 As shown, the present invention provides a button cell casing for preparing a three-electrode battery, comprising a positive electrode casing 1, a negative electrode casing 2, an insulating ring 3, and a reference electrode 4.

[0043] In this structure, a notch 101 is provided on the side of the positive electrode shell 1, through which one end of the reference electrode 4 extends into the interior of the positive electrode shell 1 to connect with the separator; the insulating ring 3 is embedded inside the positive electrode shell 1 and abuts against the top of the reference electrode 4; the negative electrode shell 2 is fastened to the top of the insulating ring 3. This structure introduces a third electrode as a reference electrode based on the existing button cell shell, thereby enabling it to function as a three-electrode battery.

[0044] Compared to the existing pouch-type three-electrode battery structure, using this button cell casing to manufacture three-electrode batteries can not only shorten the manufacturing cycle and cost of three-electrode batteries and reduce the requirements for manual skills, but also improve the yield rate and reduce material waste.

[0045] Specifically, when installing a button cell, the reference electrode 4 is connected to the separator via copper wire 6. For example... Figure 4 As shown, copper wire 6 is placed at the bottom inside the positive electrode shell 1, and one end of copper wire 6 is welded and fixed to the end of the reference electrode 4 that extends into the positive electrode shell 1. Since copper wire 6 can be bent at will and has good flexibility, it facilitates the connection operation between copper wire 6 and the separator, further improving the manufacturing efficiency of the three-electrode battery.

[0046] It should be noted that the reference electrode 4 is a rectangular sheet-shaped nickel electrode. During the fabrication of this button-type three-electrode battery, the copper wire 6 needs to be treated with sulfuric acid to remove surface oxides.

[0047] like Figure 1 As shown, the positive electrode shell 1, the negative electrode shell 2, and the insulating ring 3 are coaxially arranged. During assembly, the insulating ring 3 is first installed inside the positive electrode shell 1, and then the negative electrode shell 2 is installed on the insulating ring 3.Figure 1 In the embodiment, the top of the insulating ring 3 is provided with a ring groove 301, and the lower end of the negative shell 2 is embedded in the ring groove 301 to realize the installation of the negative shell 2.

[0048] As shown in Figures 3-4 , the bottom of the insulating ring 3 is provided with a positioning groove 302 with an opening downward, wherein the reference electrode 4 penetrates through the positioning groove 302, and the top of the reference electrode 4 abuts against the groove bottom of the positioning groove 302. During assembly, one end of the reference electrode 4 extends into the interior of the positive shell 1 through the gap 101, and then the insulating ring 3 is embedded on the inner side of the positive shell 1. After embedding, the positioning groove 302 is sleeved on the outer side of the reference electrode 4, and at the same time, the groove bottom of the positioning groove 302 abuts downward against the reference electrode 4 to fix the extending end of the reference electrode 4 at the bottom of the positive shell 1.

[0049] As shown in Figures 4-5 , the side of the insulating ring 3 is provided with a planar key table 303, and the key table 303 and the positive shell 1 form an embedding groove 102 in communication with the gap 101; one end of the insulating key 5 is embedded in the embedding groove 102, and the other end is embedded in the gap 101, and in combination Figure 3 , the bottom of the insulating key 5 abuts against the top of the reference electrode 4. Specifically, the bottom of the insulating key 5 is provided with a matching groove 501 with an opening downward, wherein the reference electrode 4 penetrates through the matching groove 501, and the top of the reference electrode 4 abuts against the groove bottom of the matching groove 501.

[0050] The shape of the embedding groove 102 is matched with the insulating key 5. When the insulating ring 3 is embedded, the insulating key 5 is embedded in the embedding groove 102, and after embedding, the side end of the insulating key 5 abuts against the key table 303. At the same time, the embedding groove 102 is sleeved on the outer side of the reference electrode 4, and the groove bottom of the embedding groove 102 abuts downward against the reference electrode 4 to fix the reference electrode 4 at the bottom of the gap 101. This mechanism realizes the secondary fixation of the reference electrode 4, improves the stability of the reference electrode 4, and at the same time, seals the gap 101 through the insulating key 5 to ensure the sealing performance of the side of the three-electrode battery.

[0051] The end of the insulating key 5 away from the key table 303 is aligned with the outer side of the positive shell 1. Figure 1 In the embodiment, the positive shell 1, the negative shell 2 and the insulating ring 3 are circular, the end of the insulating key 5 close to the key table 303 is a straight surface, and the other end is an arc surface matched with the outer arc surface of the insulating ring 3. At the same time, the middle of the arc surface is convex, the convex is used to embed in the gap 101, and the outer end of the convex is also arc-shaped, which is matched with the arc surface on the outer side of the positive shell 1.

[0052] As shown in Figure 1 and Figure 3As shown, the inner side of the positive shell 1 and the outer side of the negative shell 2 and the top of the insulating ring 3 form a sealing glue filling groove 103 for filling sealing glue to ensure the sealing of the top of the three-electrode battery.

[0053] The assembly process of the button cell shell for preparing the three-electrode battery is as follows:

[0054] First, the copper wire 6 is welded on the reference electrode 4, then the copper wire 6 is put into the positive shell 1, and one end of the reference electrode 4 is located at the inner side of the notch 101. Then, the insulating ring 3 is embedded in the positive shell 1, after being in place, the reference electrode 4 is located at the inner side of the positioning groove 302, at this time, the copper wire 6 is located at the inner side of the insulating ring 3. Subsequently, the insulating key 5 is embedded in the embedding groove 102, after being in place, the reference electrode 4 is located at the inner side of the embedding groove 102. Finally, the lower end of the negative shell 2 is embedded in the ring groove 301.

[0055] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coin cell battery case for a three-electrode battery comprising a positive electrode case (1), characterized in that: Further comprising a negative electrode shell (2), an insulating ring (3) and a reference electrode (4), wherein, The side of the positive electrode shell (1) is provided with a notch (101), one end of the reference electrode (4) extends into the inside of the positive electrode shell (1) through the notch (101) and is used for connecting the diaphragm; The insulating ring (3) is embedded in the inside of the positive electrode shell (1) and abuts against the top of the reference electrode (4) downwardly; The negative electrode shell (2) is buckled on the top of the insulating ring (3).

2. A coin cell battery case for a three-electrode battery as defined in claim 1, characterized in that: The positive electrode shell (1), the negative electrode shell (2) and the insulating ring (3) are coaxially arranged.

3. A coin cell battery case for a three-electrode battery as defined in claim 1, wherein: The top of the insulating ring (3) is provided with a ring groove (301), wherein, The lower end of the negative electrode shell (2) is embedded in the ring groove (301).

4. The coin cell battery case for a three-electrode battery of claim 1, wherein: The bottom of the insulating ring (3) is provided with a positioning groove (302) with downward opening, wherein, The reference electrode (4) penetrates through the positioning groove (302), and the top of the reference electrode (4) abuts against the groove bottom of the positioning groove (302).

5. The coin cell battery case for a three-electrode battery of claim 1, wherein: Further comprising an insulating key (5), wherein, The side of the insulating ring (3) is provided with a planar key table (303), and an embedded groove (102) is formed between the key table (303) and the positive electrode shell (1), and the embedded groove (102) communicates with the notch (101); One end of the insulating key (5) is embedded in the embedded groove (102), the other end is embedded in the notch (101), and the bottom of the insulating key (5) abuts against the top of the reference electrode (4) downwardly.

6. A coin cell battery case for use in preparing a three electrode battery according to claim 5, wherein: The side end of the insulating key (5) abuts against the key table (303).

7. A coin cell case for a three-electrode battery as defined in claim 5, wherein: The end of the insulating key (5) away from the key table (303) is aligned with the outside of the positive electrode shell (1).

8. A coin cell battery case for use in preparing a three-electrode battery according to claim 7, wherein: The bottom of the insulating key (5) is provided with a matching groove (501) with downward opening, wherein, The reference electrode (4) penetrates through the matching groove (501), and the top of the reference electrode (4) abuts against the groove bottom of the matching groove (501).

9. A coin cell battery case for use in preparing a three electrode battery according to claim 1, wherein: A sealing glue filling groove (103) is formed between the inside of the positive electrode shell (1) and the outside of the negative electrode shell (2) and the top of the insulating ring (3).

10. The coin cell battery case for a three-electrode battery of claim 1, wherein: Further comprising a copper wire (6), wherein, The copper wire (6) is placed at the bottom of the inside of the positive electrode shell (1); One end of the copper wire (6) is welded and fixed with the end of the reference electrode (4) extending into the inside of the positive electrode shell (1).

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