Detachable button cell shell

Abstract

The utility model discloses a detachable button battery shell, which relates to the technical field of batteries, and comprises a cathode shell and an anode shell, buckles are symmetrically arranged on the side wall of the cathode shell, hasps corresponding to the buckles are arranged on the side wall of the anode shell, the cathode shell is clamped at the opening at the upper end of the anode shell, and the buckle is arranged at the lower end of the anode shell. The negative pole shell and the positive pole shell are limited and mounted in the buckle groove through the annular fixing clamp hook rotating on the hasp, and the negative pole shell and the positive pole shell are sealed through the sealing ring. According to the utility model, the annular fixing clamp is hooked in the groove of the buckle, the cathode shell is arranged on the opening side of the anode shell in a limiting manner, and when the cathode shell is disassembled, the lock body is shifted to rotate around the convex block on the lock seat, the annular fixing clamp is separated from the groove of the buckle, and then the annular fixing clamp is rotated to be lapped on the outer side wall of the lock body, so that the cathode shell is disassembled. And the negative shell is separated from the positive shell, and the mounting ring of the negative shell is pulled out of the positive shell, so that the disassembly is convenient, and the appearances of the internal positive plate and the negative plate are not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a detachable button battery shell. Background Art

[0002] Lithium-ion batteries have gradually replaced lead-acid batteries and become the mainstream battery in the market due to their high energy density, long cycle life and good safety performance. At the same time, lithium-ion batteries have also been widely used in various fields such as energy storage power stations, communication base stations, substations and other backup power systems and common laptops. Lithium-ion materials are one of the key factors affecting battery performance, and analysis and testing are necessary means to ensure the quality and performance of lithium-ion battery materials. In order to better understand the material's gram capacity, capacity utilization, first effect, cycle, and electrical properties at different rates, the electrochemical properties will be measured by assembling button batteries.

[0003] Button batteries are mainly composed of a positive electrode shell, a negative electrode shell, a pole piece, a spring, and an electrolyte. The conventional button battery assembly process in the laboratory is: after flattening the metal lithium sheet with a sheet pressing mold, assemble the negative electrode shell, gasket, lithium sheet, isolation membrane, pole piece, gasket, and positive electrode shell in sequence, and finally place the button battery with the negative electrode facing up on the button battery sealing machine mold, adjust the pressure and press for 5 seconds to complete the assembly preparation.

[0004] At present, the commonly used battery shells in the industry are CR2032, CR2025, CR2016, etc. These buckle battery shells are disposable products and cannot be reused; at the same time, disassembling the shell is a destructive action, which seriously affects the surface state of the electrode and is not conducive to the observation of the positive / negative electrode interface. In addition, the buckle battery sealing is completed using a hydraulic or electric sealing machine, in which the sealing pressure cannot be accurately controlled, which will cause poor consistency of the buckle batteries in the same group, affecting the accuracy of the test results, and requiring high technical skills of the operator. Utility Model Content

[0005] The purpose of the utility model is to provide a detachable button battery housing to solve the above-mentioned multiple defects caused by the prior art.

[0006] A detachable button battery shell comprises a negative electrode shell and a positive electrode shell, wherein buckles are symmetrically mounted on the side wall of the negative electrode shell, and buckles corresponding to the buckles are mounted on the side wall of the positive electrode shell, wherein the negative electrode shell is clamped at the upper end opening of the positive electrode shell, and the negative electrode shell and the positive electrode shell are limitedly mounted in buckle grooves by means of an annular fixing clip hook rotating on the buckle, and the negative electrode shell and the positive electrode shell are sealed by means of a sealing ring.

[0007] Preferably, the buckle includes a lock seat installed on the side wall of the positive electrode shell, a lock body is rotatably connected to the protrusion of the lock seat, an annular fixing clip is rotatably connected to the side wall of the lock body, and one end of the annular fixing clip is embedded in the groove of the buckle.

[0008] Preferably, a mounting ring with a "U"-shaped half-section is provided on the lower side of the negative electrode shell, the outer wall of the mounting ring abuts against the inner wall of the positive electrode shell, and the sealing ring is installed in the "U"-shaped ring groove of the mounting ring.

[0009] Preferably, a mesh gasket is installed on the inner bottom side of the positive electrode shell, a positive electrode sheet is installed on the gasket, a separator is installed on the positive electrode sheet, and a negative electrode sheet is installed on the separator.

[0010] The advantages of the utility model are as follows: the utility model hooks the annular fixing clip in the groove of the buckle to limit the installation of the negative electrode shell on the open side of the positive electrode shell. At the same time, when disassembling the negative electrode shell, the lock body is rotated around the protrusion on the lock seat, and the annular fixing clip is disengaged from the groove of the buckle. Then the annular fixing clip is rotated so that the annular fixing clip overlaps the outer wall of the lock body. Subsequently, the negative electrode shell and the positive electrode shell are separated, and the mounting ring of the negative electrode shell is pulled out of the positive electrode shell, so that disassembly is convenient and the appearance of the internal positive and negative electrode sheets will not be damaged. At the same time, the disassembled buckle battery shell (negative electrode shell and positive electrode shell) can be recycled after cleaning, and the difficulty of sealing in the buckle battery assembly is reduced, the consistency of the sealing pressure is ensured, and the accuracy of the test results is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a schematic diagram of the half-section structure of the utility model as a whole.

[0013] Figure 3 The utility model is a schematic diagram of the assembly structure of the buckle and the hasp.

[0014] Figure 4 It is a partial half-section structural schematic diagram of the utility model as a whole.

[0015] Figure 5 For lithium iron phosphate - different personnel use traditional / patented shell assembly buckle test results.

[0016] Figure 6 For graphite - different personnel use traditional / patented shell assembly buckle test results.

[0017] Figure 7 This is the electrode interface after the traditional buckle battery shell is made.

[0018] Figure 8It is the interface of the pole piece after the buckle battery shell of the utility model is manufactured.

[0019] Fig. 9 Under normal temperature and humidity conditions, the color of anhydrous copper sulfate inside the battery changes at different times.

[0020] Among them: 1-negative electrode shell; 2-positive electrode shell; 3-clip; 4-hook; 5-sealing ring; 6-lock seat; 7-lock body; 8-annular fixing clip; 9-mounting ring; 10-gasket; 11-positive electrode sheet; 12-isolation membrane; 13-negative electrode sheet. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 9 As shown, a detachable button battery shell includes a negative electrode shell 1 and a positive electrode shell 2, a buckle 3 is symmetrically installed on the side wall of the negative electrode shell 1, and a buckle 4 corresponding to the buckle 3 is installed on the side wall of the positive electrode shell 2. The negative electrode shell 1 is clamped at the upper end opening of the positive electrode shell 2, and the negative electrode shell 1 and the positive electrode shell 2 are hooked in the groove of the buckle 3 through an annular fixing clip 8 rotating on the buckle 4 for limited installation, and the negative electrode shell 1 and the positive electrode shell 2 are sealed by a sealing ring 5. The negative electrode shell 1 is mainly made of stainless steel, and its surface is a mesh structure. The buckle 3 and the annular fixing clip 8 are both made of stainless steel. One end of the annular fixing clip 8 is hooked in the groove of the buckle 3, and the lock body 7 is attached to the lock seat 6, thereby fixing the positive and negative electrode shells. The lock body 7 plays an adjustable role. The lock body 7 is turned downward to tighten the annular fixing clip 8 to fix the negative electrode shell 1 on the opening side of the positive electrode shell 2, and the lock body 7 is turned upward to loosen the annular fixing clip 8. At this time, the annular fixing clip 8 is rotated so that the annular fixing clip 8 overlaps the outer side wall of the lock body 7, so as to facilitate the use when disassembling the buckle battery shell. The material of the positive electrode shell 2 is stainless steel, which is responsible for accommodating the mesh gasket 10, the positive electrode sheet 11, the isolation membrane 12 and the negative electrode sheet 13. At the same time, the positive electrode shell 2 contains electrolyte.

[0023] In this embodiment, the buckle 4 includes a lock seat 6 mounted on the side wall of the positive electrode shell 2, a lock body 7 is rotatably connected to the projection of the lock seat 6, an annular fixing clip 8 is rotatably connected to the side wall of the lock body 7, and one end of the annular fixing clip 8 is embedded and matched with the groove of the buckle 3. A rotating shaft is rotatably connected to the projection of the lock seat 6, and both ends of the rotating shaft are rotatably connected to the two side walls of the lock body 7, so that the lock body 7 can be conveniently rotated around the projection of the lock seat 6 through the rotating shaft. The lock seat 6 is welded to the outer side wall of the positive electrode shell 2 through a mounting seat, and the buckle 3 is set to an arc concentric with the negative electrode shell 1. The lock seat 6, the lock body 7 and the annular fixing clip 8 all have the same arc as the buckle 3, so that the end of the annular fixing clip 8 that contacts the buckle 3 is conveniently clamped in the groove of the bayonet 3.

[0024] In this embodiment, a mounting ring 9 with a "U"-shaped half-section is provided on the lower side of the negative electrode case 1, the outer side wall of the mounting ring 9 abuts against the inner wall of the positive electrode case 2, and the sealing ring 5 is installed in the "U"-shaped ring groove of the mounting ring 9. The "U"-shaped mounting ring 9 has a certain elasticity. When the negative electrode case 1 inserts the mounting ring 9 into the positive electrode case 2, the outer side wall of the mounting ring 9 is compressed toward the "U"-shaped inner groove direction, so that the outer side wall of the mounting ring 9 abuts against the inner wall of the positive electrode case 2, which plays a certain locking role, and cooperates with the sealing role played by the sealing ring 5.

[0025] In this embodiment, a mesh gasket 10 is installed on the inner bottom side of the positive electrode shell 2 , a positive electrode sheet 11 is installed on the gasket 10 , a separator 12 is installed on the positive electrode sheet 11 , and a negative electrode sheet 13 is installed on the separator 12 .

[0026] In this embodiment, the negative electrode shell 1 and the positive electrode shell 2 need to be ultrasonically cleaned 3 times with anhydrous ethanol before use, and then placed in a 60°C oven to dry for more than 2 hours. The utility model provides the following steps for cleaning the negative electrode shell 1 and the positive electrode shell 2:

[0027] 1. Open the lock body 7 of the patented device upwards and release the annular fixing clip 8;

[0028] 2. Separate the positive electrode shell 2 and the negative electrode shell 1 of the button battery and take them out;

[0029] 3. After ultrasonic cleaning of the positive electrode shell 2 and the negative electrode shell 1 of the button battery for 3 times with anhydrous ethanol, place them in a 60°C oven to dry for more than 2 hours for later use;

[0030] Comparative Example 1: [Using traditional buckle switch shell to make buckle switch]

[0031] 1. Select lithium iron phosphate positive electrode sheet and graphite negative electrode sheet;

[0032] 2. A / B / C laboratory staff use traditional buckle switch shells to make buckle switches, and the number of buckle switches in each group is 6ea;

[0033] 3. Compare the power-off data, disassemble the power-off, and compare the interface status of the electrode;

[0034] Example 1: [Using the patented buckle switch housing to make a buckle switch]

[0035] 1. Select lithium iron phosphate positive electrode sheet and graphite negative electrode sheet;

[0036] 2. A / B / C laboratory personnel use the patented buckle switch housing to make buckle switches, and the number of buckle switches in each group is 6ea;

[0037] 3. Compare the power-off data, disassemble the power-off, and compare the interface status of the electrode;

[0038] Example 2: [Verification of the sealing performance of the patented buckle housing of the utility model]

[0039] 1. Put an appropriate amount of anhydrous copper sulfate powder into the negative electrode shell 1 of the utility model patent and then package it to make 6 buckle batteries;

[0040] 2. Place the six buttons in a normal temperature and humidity environment;

[0041] 3. Take it to the glove box for disassembly after 1h, 4h, 12h, 24h, 48h and 96h respectively;

[0042] 4. Observe the color change of anhydrous copper sulfate powder in the negative electrode shell 1;

[0043] According to Comparative Example 1 and Example 1, the test data of different people using the traditional buckle power housing and the buckle power housing of the present invention are compared:

[0044] Table 1: Lithium iron phosphate - test results of different personnel using traditional / patented housing assembly and power-on test

[0045]

[0046] Lithium iron phosphate - Comparison of test results of different personnel using traditional / patented shell assembly and buckle test (see attached) Figure 5 shown.

[0047] Table 2: Graphite - Test results of different personnel using traditional / patented housing assembly and power-on test

[0048]

[0049] Graphite - Comparison of the test results of different personnel using traditional / patented shell assembly buckle test (see attached) Figure 6 shown.

[0050] Comprehensive analysis:

[0051] From the data of different people using traditional snap-on battery shells and the snap-on battery shells of the present patent to make positive and negative electrode pieces, it can be seen that the test results of the positive and negative poles of the snap-on batteries made by different people using traditional snap-on battery shells have large deviations; while the test results of the positive and negative poles of the snap-on batteries made by different people using the snap-on battery shells of the present patent are relatively consistent; this shows that the snap-on battery shell of the present patent has a significant effect on improving the stability of the test results.

[0052] By disassembling the two types of buckle batteries, it can be found that after the traditional buckle battery shell is disassembled, defects such as powder loss and gaps appear on the interface of the electrode (see the attached Figure 7 ); while the interface of the patented buckle battery case is intact after disassembly (as shown in the attached Figure 8 This provides a guarantee for the subsequent electrode interface analysis.

[0053] And by placing anhydrous copper sulfate powder in the buckle shell to judge the sealing effect of this patent, (normal temperature and humidity conditions---the color change of anhydrous copper sulfate inside the buckle at different times is shown in the attached Fig. 9 As shown in the figure, it can be seen that after being placed at room temperature and humidity for 96 hours, the color of the anhydrous copper sulfate powder does not change, proving that the buckle battery housing of this patent has good sealing performance.

[0054] The working principle of the utility model is as follows: the positive electrode shell 2 of the device is placed on a workbench, and then the gasket 10, the positive electrode sheet 11, the isolation film 12 and the negative electrode sheet 13 are stacked and placed in the positive electrode shell 2 in sequence, and then the electrolyte is dripped on the negative electrode sheet 13 and fills the entire inner cavity of the positive electrode shell 2, and the sealing ring 5 is placed in the "U"-shaped groove of the mounting ring 9, and then the mounting ring 9 at the bottom end of the negative electrode shell 1 is inserted into the positive electrode shell 2, and the buckle 3 is placed at the position corresponding to the buckle 4, the lock body 7 is rotated upward to lift the annular fixing clip 8, and the annular fixing clip 8 is sleeved on the buckle 3, and then the lock body 7 is rotated downward to make the annular fixing clip 8 fall and be stuck in the groove of the buckle 3, and the installation of the negative electrode shell 1 and the positive electrode shell 2 is completed.

[0055] The utility model limits the negative electrode shell 1 to the open side of the positive electrode shell 2 by means of the annular fixing clip hook 8 in the groove of the buckle 3. When the negative electrode shell 1 is disassembled, the lock body 7 is turned to rotate around the protrusion on the lock seat 6, and the annular fixing clip 8 is disengaged from the groove of the buckle 3. Then the annular fixing clip 8 is rotated so that the annular fixing clip 8 overlaps the outer wall of the lock body 7. Then the negative electrode shell 1 and the positive electrode shell 2 are separated, and the mounting ring of the negative electrode shell 1 is pulled out from the positive electrode shell 2, so that the disassembly is convenient and the appearance of the internal positive electrode sheet 12 and the negative electrode sheet 13 will not be damaged. At the same time, the disassembled buckle battery shell (negative electrode shell 1 and positive electrode shell 2) can be recycled after cleaning, which reduces the difficulty of sealing in the buckle battery assembly, ensures the consistency of the sealing pressure, and improves the accuracy of the test results.

[0056] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A detachable button battery housing, characterized in that: The invention comprises a negative electrode shell (1) and a positive electrode shell (2), wherein a buckle (3) is symmetrically mounted on the side wall of the negative electrode shell (1), and a buckle (4) corresponding to the buckle (3) is mounted on the side wall of the positive electrode shell (2), wherein the negative electrode shell (1) is buckled at the upper end opening of the positive electrode shell (2), and the negative electrode shell (1) and the positive electrode shell (2) are hooked in the groove of the buckle (3) by a rotating annular fixing clip (8) on the buckle (4) for limited installation, and the negative electrode shell (1) and the positive electrode shell (2) are sealed by a sealing ring (5).

2. A detachable button battery housing according to claim 1, characterized in that: The buckle (4) comprises a lock seat (6) mounted on the side wall of the positive electrode shell (2); a lock body (7) is rotatably connected to the protrusion of the lock seat (6); an annular fixing clip (8) is rotatably connected to the side wall of the lock body (7); one end of the annular fixing clip (8) is embedded in the groove of the buckle (3).

3. The detachable button battery housing according to claim 1, characterized in that: A mounting ring (9) having a half-section in a "U" shape is provided on the lower side of the negative electrode shell (1); the outer wall of the mounting ring (9) abuts against the inner wall of the positive electrode shell (2), and the sealing ring (5) is installed in the "U"-shaped ring groove of the mounting ring (9).

4. The detachable button battery housing according to claim 1, characterized in that: A mesh gasket (10) is installed on the inner bottom side of the positive electrode shell (2), a positive electrode sheet (11) is installed on the gasket (10), a separator (12) is installed on the positive electrode sheet (11), and a negative electrode sheet (13) is installed on the separator (12).

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