Battery negative electrode bottom cover

Abstract

The utility model discloses a battery negative electrode bottom cover which comprises a positive electrode shell, a negative electrode bottom cover body is installed on the inner side of an upper port of the positive electrode shell, a partition plate is clamped on the inner side of the positive electrode shell and located below the negative electrode bottom cover body, the negative electrode bottom cover body is arranged to be in a circular truncated cone shape, and a buckling edge bent upwards is fixed to the edge of a lower port of the negative electrode bottom cover body. An insulation sleeve is clamped between the outer side of the negative electrode bottom cover and the inner side of the positive electrode shell, a clamping ring bent inwards is fixed to the edge of an upper end opening of the partition plate, a buckling edge at the edge of the lower end of the negative electrode bottom cover is clamped to the inner side of the upper end opening of the partition plate, and the upper end of the buckling edge abuts against the lower side of the clamping ring. When the negative electrode bottom cover is mounted, the partition plate is clamped on the inner side of the positive electrode shell, then the lower end part of the negative electrode bottom cover is clamped into the inner side of the positive electrode shell and is inserted into the inner side of the partition plate, and the negative electrode bottom cover is clamped and fixed through the matching of the buckling edge and the clamping ring; therefore, the negative electrode bottom cover is more convenient and quicker to mount.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a negative electrode bottom cover of a battery. Background Art

[0002] The negative bottom cover of the battery mainly has the functions of supporting the sealing ring, contact conductivity, and safe gas discharge. The negative bottom cover is an indispensable part of the battery.

[0003] A Chinese patent with announcement number CN214753933U discloses a negative electrode bottom cover of a battery; it includes a negative electrode bottom cover arranged in the upper end of a positive electrode shell, and a first flange extending upward and close to the positive electrode shell is arranged on the outer side of the lower end of the negative electrode bottom cover; a current collector fixing block is arranged in the lower end of the negative electrode bottom cover, and a negative electrode current collector compressed vertically downward is fixedly arranged at the lower end of the current collector fixing block; a partition arranged coaxially with the negative electrode current collector is sleeved on the outer side of the middle part of the negative electrode current collector, and a U-shaped bent portion with a downwardly bent cross-section is arranged on the outer side of the partition; the utility model can not only generate an outward thrust on the negative electrode bottom cover and the first flange to ensure the sealing performance of the second flange through the arrangement of an auxiliary support ring, but also can form a buffer chamber with the U-shaped bent portion, and can achieve a buffering purpose by compressing the air in the buffer chamber when the product is bloated or exploded.

[0004] When the above-mentioned battery negative electrode bottom cover is installed in the positive electrode shell, it needs to be installed on the inner side of the upper port of the positive electrode shell and pressed downward against the partition, and then filled and sealed with insulating glue, and finally the upper port of the positive electrode shell is shrunken to complete the fixation of the negative electrode bottom cover, which has certain inconveniences in the installation and fixation of the negative electrode bottom cover. Utility Model Content

[0005] In order to solve the problem that the above-mentioned battery negative electrode bottom cover has certain inconveniences in the installation and fixation of the negative electrode bottom cover, the present application provides a battery negative electrode bottom cover, which adopts the following technical solution:

[0006] A negative electrode bottom cover of a battery comprises a positive electrode shell, wherein the negative electrode bottom cover is installed on the inner side of an upper port of the positive electrode shell, and a partition is clamped on the inner side of the positive electrode shell below the negative electrode bottom cover, the negative electrode bottom cover is arranged in a truncated cone shape, and a buckle edge bent upward is fixed on the edge of the lower port of the negative electrode bottom cover, an insulating sleeve is clamped between the outer side of the negative electrode bottom cover and the inner side of the positive electrode shell, a clamping ring bent inwardly is fixed on the edge of the upper port of the partition, the buckle edge of the lower end edge of the negative electrode bottom cover is clamped on the inner side of the upper port of the partition, and the upper end of the buckle edge is pressed against the lower side of the clamping ring, and a negative electrode current collector fixedly connected to the negative electrode bottom cover is arranged at the inner center of the positive electrode shell.

[0007] Optionally, an annular convex rib is fixed to the upper end surface of the negative electrode bottom cover, and a fixing sleeve for fixing the negative electrode current collector is fixed to the inner top of the negative electrode bottom cover.

[0008] Optionally, the separator is made of insulating material, and the outer diameter of the separator is the same as the inner diameter of the positive electrode shell.

[0009] Optionally, an annular buckle groove is provided on the outer surface of the positive electrode shell, and an inner curling edge that is turned inward is fixed on the inner side of the upper port of the positive electrode shell, the lower end of the inner curling edge is inclined toward the inner wall of the positive electrode shell, and the lower end of the inner curling edge is pressed against the upper side of the clamping ring.

[0010] Optionally, the upper surface edge of the insulating sleeve is fixed with a rim that is sleeved on the upper port edge of the positive electrode shell, and the lower side of the insulating sleeve is fixed with a sleeve edge inserted between the negative electrode bottom cover and the positive electrode shell, and the outer side of the sleeve edge is fixed with a raised retaining rib.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, when the negative electrode bottom cover is installed, the partition is clamped on the inner side of the positive electrode shell, and then the lower end of the negative electrode bottom cover is clamped into the inner side of the positive electrode shell and inserted into the inner side of the partition, and the clamping and fixing of the negative electrode bottom cover is achieved through the cooperation of the buckle edge and the clamping ring, so that the installation of the negative electrode bottom cover is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a cross-sectional view of a negative electrode bottom cover of a battery of the utility model;

[0015] Figure 2 It is a schematic diagram of a negative electrode bottom cover of a battery negative electrode bottom cover shown in the utility model;

[0016] Figure 3 It is a schematic diagram of a separator of a negative electrode bottom cover of a battery shown in the utility model;

[0017] Figure 4 It is a schematic diagram of a positive electrode shell of a battery negative electrode bottom cover shown in the utility model;

[0018] Figure 5 It is a schematic diagram of an insulating sleeve of a battery negative electrode bottom cover shown in the utility model.

[0019] In the figure: 1, positive electrode shell; 11, annular buckle groove; 12, inner curling edge; 2, insulating sleeve; 21, edging; 22, clamping rib; 23, sleeve edge; 3, negative electrode bottom cover; 31, buckle edge; 32, convex rib; 33, fixing sleeve; 4, negative electrode current collector; 5, separator; 51, clamping ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0021] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, a negative electrode bottom cover of a battery comprises a positive electrode shell 1, a negative electrode bottom cover 3 is installed on the inner side of the upper port of the positive electrode shell 1, and a partition 5 is clamped on the inner side of the positive electrode shell 1 below the negative electrode bottom cover 3, the negative electrode bottom cover 3 is set to be truncated, and a buckle edge 31 bent upward is fixed on the edge of the lower port of the negative electrode bottom cover 3, an insulating sleeve 2 is clamped between the outer side of the negative electrode bottom cover 3 and the inner side of the positive electrode shell 1, a clamp ring 51 bent inwardly is fixed on the edge of the upper port of the partition 5, and the buckle edge 31 of the lower end edge of the negative electrode bottom cover 3 is clamped on The inner side of the upper port of the separator 5, and the upper end of the buckle edge 31 is pressed against the lower side of the clamping ring 51, and the inner center of the positive electrode shell 1 is provided with a negative electrode collector 4 fixedly connected to the negative electrode bottom cover 3. When installing the negative electrode bottom cover 3, the separator 5 is clamped on the inner side of the positive electrode shell 1, and then the lower end of the negative electrode bottom cover 3 is clamped into the inner side of the positive electrode shell 1 and inserted into the inner side of the separator 5. The clamping and fixing of the negative electrode bottom cover 3 is realized by the cooperation of the buckle edge 31 and the clamping ring 51, so that the installation of the negative electrode bottom cover 3 is more convenient and quick.

[0022] Please refer to Figure 2 As shown, the upper end surface of the negative electrode bottom cover 3 is fixed with an annular convex rib 32 to facilitate conductive contact with the outside, and the inner top of the negative electrode bottom cover 3 is fixed with a fixing sleeve 33 for fixing the negative electrode current collector 4, and the fixing sleeve 33 is used to fit and fix the negative electrode current collector 4.

[0023] Please refer to Figure 3As shown, the separator 5 is made of insulating material to play an insulating role, and the outer diameter of the separator 5 is the same as the inner diameter of the positive electrode shell 1 to achieve better sealing.

[0024] Please refer to Figure 4 As shown, an annular buckle groove 11 is provided on the outer surface of the positive electrode shell 1, and the annular buckle groove 11 protrudes into the positive electrode shell 1 to limit and block the partition 5. An inner curling edge 12 that is turned inward is fixed to the inner side of the upper port of the positive electrode shell 1 to limit and block the clamping ring 51 of the partition 5. The lower end of the inner curling edge 12 is inclined towards the inner wall direction of the positive electrode shell 1 to better achieve the installation and clamping fit of the insulating sleeve 2, and the lower end of the inner curling edge 12 is pressed against the upper side of the clamping ring 51 to limit the upper side of the clamping ring 51.

[0025] Please refer to Figure 5 As shown, the edge of the upper surface of the insulating sleeve 2 is fixed with a rim 21 that is sleeved on the edge of the upper port of the positive electrode shell 1 for sealing the edge of the upper port of the positive electrode shell 1, and the lower side of the insulating sleeve 2 is fixed with a sleeve edge 23 that is inserted between the negative electrode bottom cover 3 and the positive electrode shell 1 and is inserted in the cavity between the negative electrode bottom cover 3 and the positive electrode shell 1, and the outer side of the sleeve edge 23 is fixed with a raised clamping rib 22 to achieve clamping close to the inclined surface of the lower end of the inner curling edge 12.

[0026] Working principle: When installing the negative electrode bottom cover 3, directly insert its lower end into the inner side of the upper port of the positive electrode shell 1 and continue to press downward so that the edge of the lower port of the negative electrode bottom cover 3 is inserted into the inner side of the partition 5 and installed and fixed under the obstruction of the clamping ring 51, and then put the insulating sleeve 2 on the outer side of the negative electrode bottom cover 3 and press downward to complete the sealing process of the negative electrode bottom cover 3 after installation.

[0027] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery negative electrode bottom cover, comprising a positive electrode shell (1), characterized in that: A negative electrode bottom cover (3) is installed on the inner side of the upper port of the positive electrode shell (1), and a partition (5) is clamped on the inner side of the positive electrode shell (1) below the negative electrode bottom cover (3). The negative electrode bottom cover (3) is arranged in a truncated cone shape, and a buckle edge (31) bent upward is fixed on the edge of the lower port of the negative electrode bottom cover (3). An insulating sleeve (2) is clamped between the outer side of the negative electrode bottom cover (3) and the inner side of the positive electrode shell (1). A clamping ring (51) bent inward is fixed on the edge of the upper port of the partition (5). The buckle edge (31) of the lower end edge of the negative electrode bottom cover (3) is clamped on the inner side of the upper port of the partition (5), and the upper end of the buckle edge (31) is pressed against the lower side of the clamping ring (51). A negative electrode current collector (4) fixedly connected to the negative electrode bottom cover (3) is arranged at the inner center of the positive electrode shell (1).

2. A battery negative electrode bottom cover according to claim 1, characterized in that: An annular convex rib (32) is fixed to the upper end surface of the negative electrode bottom cover (3), and a fixing sleeve (33) for fixing the negative electrode current collector (4) is fixed to the inner top of the negative electrode bottom cover (3).

3. A battery negative electrode bottom cover according to claim 1, characterized in that: The separator (5) is made of insulating material, and the outer diameter of the separator (5) is the same as the inner diameter of the positive electrode shell (1).

4. A battery negative electrode bottom cover according to claim 3, characterized in that: An annular buckle groove (11) is provided on the outer surface of the positive electrode shell (1), and an inner curling edge (12) that is turned inward is fixed to the inner side of the upper end of the positive electrode shell (1), the lower end of the inner curling edge (12) is inclined in the direction of the inner wall of the positive electrode shell (1), and the lower end of the inner curling edge (12) is tightly pressed against the upper side of the clamping ring (51).

5. A battery negative electrode bottom cover according to claim 4, characterized in that: The upper surface edge of the insulating sleeve (2) is fixed with a rim (21) which is sleeved on the upper end edge of the positive electrode shell (1), and the lower side of the insulating sleeve (2) is fixed with a sleeve edge (23) inserted between the negative electrode bottom cover (3) and the positive electrode shell (1), and the outer side of the sleeve edge (23) is fixed with a raised clamping rib (22).

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