CN218975602U

CN218975602U - Core-wrapped low-temperature high-power lithium manganese button cell

Info

Publication number: CN218975602U
Application number: CN202222347541.4U
Authority: CN
Inventors: 徐剑锋
Original assignee: Changzhou Yufeng Battery Co ltd
Current assignee: Changzhou Yufeng Battery Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-05-05
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a core-wrapped low-temperature high-power lithium manganese button cell, which comprises: the positive electrode cover is provided with a lower metal gasket at the inner bottom end, the upper end of the positive electrode lug is connected with a connecting assembly, and the outer end of the middle part of the connecting assembly is provided with a supporting seat; the support rod is arranged at the inner end of the middle part of the positive electrode cover, the upper side of the inner end of the positive electrode cover is connected with a rubber ring, the inner end of the rubber ring is provided with a negative electrode cover, and the inner end of the negative electrode cover is provided with an upper connecting block; the negative pole tab, it sets up in the upper end of connecting the sub-assembly, and the upper end of negative pole tab is connected with the metal gasket, the downside outer end of connecting the sub-assembly is provided with down the connecting block. The core-wrapped low-temperature high-power lithium manganese button cell effectively increases the contact area of the positive electrode plate and the negative electrode plate in the cell, reduces the internal resistance of the cell, and simultaneously limits the parts in the cell to avoid the deviation of the parts in the position due to impact.

Description

Core-wrapped low-temperature high-power lithium manganese button cell

Technical Field

The utility model relates to the technical field of lithium manganese button cells, in particular to a core-pack type low-temperature high-power lithium manganese button cell.

Background

The lithium manganese button cell is also called a lithium metal cell or a manganese dioxide button cell, the positive electrode material is manganese dioxide with stable chemical properties, the negative electrode material is metal lithium, the lithium manganese button cell is a primary cell (non-rechargeable), and compared with other lithium cell systems, the lithium manganese button cell has higher requirements on processing, storage, environment and wide temperature conditions, and is widely applied in life, however, the current core-pack type low-temperature high-power lithium manganese button cell still has some defects, such as;

the utility model with the publication number of CN212571153U discloses a metal circular button cell, which comprises a metal circular button cell shell and an outer explosion-proof nickel sheet, wherein the upper side of the metal circular button cell shell is welded and connected with a metal circular button cell cap, the middle part of the metal circular button cell cap is welded and connected with an inner explosion-proof nickel sheet, a liquid injection hole is formed in the metal circular button cell cap, and steel balls are arranged on the inner side of the liquid injection hole. This circular button cell of metal, the notes liquid hole that a diameter size is 1.2mm is reserved on the circular button cell block of metal, the direct mode that utilizes laser welding carries out sealing welding to circular button cell block of metal and circular button cell shell of metal, the later stage only needs directly to utilize notes liquid hole alright pour into a mould electrolyte, and can be according to the battery model, annotate liquid measure size, annotate liquid several times, let electrolyte fully soak, let electrolyte fully absorbed by the electric core, quick realization battery's assembly, and can not cause the influence to the pouring of electrolyte.

The prior art solutions described above have the following drawbacks: the contact area of the positive electrode plate and the negative electrode plate is small, so that the internal resistance of the battery is increased, and meanwhile, the limit of the internal parts of the battery is inconvenient, so that the utility model provides a core-wrapped low-temperature high-power lithium manganese button battery to solve the problems.

Disclosure of Invention

To solve the problems set forth in the background art. The utility model provides a core-wrapped low-temperature high-power lithium manganese button cell, which has the characteristics of changing the prior core-wrapped low-temperature high-power lithium manganese button cell, increasing the internal resistance of the cell caused by small contact area of an anode plate and a cathode plate, and being inconvenient for limiting internal parts of the cell.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a core-wrap low-temperature high-power lithium manganese button cell comprising:

the positive electrode cover is provided with a lower metal gasket at the inner bottom end, a positive electrode lug is arranged at the upper end of the lower metal gasket, the upper end of the positive electrode lug is connected with a connecting assembly, and a supporting seat is arranged at the outer end of the middle part of the connecting assembly;

the support rod is arranged at the inner end of the middle part of the positive electrode cover, the upper side of the inner end of the positive electrode cover is connected with a rubber ring, the inner end of the rubber ring is provided with a negative electrode cover, and the inner end of the negative electrode cover is provided with an upper connecting block;

the negative pole tab, it sets up in the upper end of connecting the sub-assembly, and the upper end of negative pole tab is connected with metal gasket, the downside outer end of connecting the sub-assembly is provided with down the connecting block, and the circulation groove has been seted up to the inside of connecting block down.

By adopting the technical scheme, the contact areas of the positive plate and the negative plate are increased through the internal winding connection of the connecting assembly.

As a preferable technical scheme of the utility model, the lower metal gasket is in opposite clamping connection with the positive electrode tab, and the longitudinal section of the lower metal gasket is U-shaped.

By adopting the technical scheme, the lower metal gasket is connected with the positive electrode lug in a clamping way, so that the position of the positive electrode lug is conveniently positioned.

As a preferable technical scheme of the utility model, the connecting assembly consists of a positive plate body, a diaphragm and a negative plate body;

the positive plate body is arranged at the upper end of the positive electrode lug;

a diaphragm sheet connected to the inner end of the positive electrode sheet body;

and a negative electrode sheet body mounted on the inner end of the diaphragm sheet.

By adopting the technical scheme, the space is utilized by winding the inside of the connecting assembly in a limited space.

As a preferable technical scheme of the utility model, the positive plate body, the diaphragm and the negative plate body are all connected by winding.

By adopting the technical scheme, the positive electrode plate body, the diaphragm plate and the negative electrode plate body are connected through winding, so that the contact area of the positive electrode and the negative electrode is increased.

As a preferable technical scheme of the utility model, the supporting seats and the supporting rods are arranged in one-to-one correspondence, the supporting rods are arranged at equal angles relative to the center of the positive electrode cover, and the supporting rods are in opposite clamping connection with the negative electrode cover.

By adopting the technical scheme, the connecting assembly is limited through the supporting seat, so that the connecting assembly is prevented from shaking in the battery.

As a preferable technical scheme of the utility model, the rubber ring is oppositely attached and connected with the positive electrode cover.

By adopting the technical scheme, the positive electrode cover is attached to the rubber ring, so that the tightness between the positive electrode cover and the negative electrode cover is improved after electrolyte is added into the battery.

As a preferred technical scheme of the utility model, the circulation grooves are symmetrically arranged on the left and right sides of the vertical central axis of the lower connecting block, and the diameter size of the lower connecting block is larger than the overall diameter size of the connecting assembly.

By adopting the technical scheme, the connecting assembly is positioned through the circulation groove, so that the internal looseness of the connecting assembly is avoided.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the positive plate body, the diaphragm and the negative plate body are arranged, and the diaphragm is connected with the positive plate body and the negative plate body around the fixed edge in a winding way, so that the problem of large internal resistance of the battery caused by small contact area of the positive plate and the negative plate in the market is solved, and the service efficiency of the battery is improved;

2. when the battery is internally installed, the positive electrode tab is clamped on the lower metal gasket, after electrolyte is added, the negative electrode tab is clamped with the upper metal gasket, and the position of the connecting assembly is limited by the support seat corresponding to the support rod, so that the position of internal parts of the battery is prevented from shifting after the battery is impacted, and the normal use of the battery is prevented from being influenced;

3. according to the utility model, the positive electrode cover, the rubber ring and the negative electrode cover are arranged, the positive electrode cover and the rubber ring are relatively and in fit connection, after the positive electrode lug and the lower metal gasket are clamped, a proper amount of electrolyte is added into the positive electrode cover, the negative electrode cover is pressed into the positive electrode cover, the rubber ring increases the tightness of connection between the positive electrode cover and the negative electrode cover, and the electrolyte in the positive electrode cover is prevented from flowing out from a gap between the positive electrode cover and the negative electrode cover.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a front cross-sectional structure of the present utility model;

FIG. 2 is a schematic view of the overall deployment configuration of the connection assembly of the present utility model;

FIG. 3 is a schematic view of the overall structure of the connection assembly and the negative electrode tab of the present utility model;

FIG. 4 is a schematic view of the overall structure of the negative electrode cap of the present utility model;

fig. 5 is a schematic diagram of a top view of the connection between the support base and the support rod according to the present utility model.

In the figure: 1. a positive electrode cover; 2. a lower metal gasket; 3. a positive electrode tab; 4. a connection assembly; 401. a positive electrode sheet body; 402. a diaphragm sheet; 403. a negative electrode sheet body; 5. a support base; 6. a support rod; 7. a rubber ring; 8. a negative electrode cover; 9. an upper connecting block; 10. a metal gasket is arranged on the upper part; 11. a negative electrode tab; 12. a lower connecting block; 13. a flow channel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides the following technical solutions: a core-wrap low-temperature high-power lithium manganese button cell comprising: the cathode cover 1, the lower metal gasket 2, the cathode lug 3, the connecting assembly 4, the supporting seat 5, the supporting rod 6, the rubber ring 7, the cathode cover 8, the upper connecting block 9, the upper metal gasket 10, the cathode lug 11, the lower connecting block 12 and the circulation groove 13;

as shown in fig. 1, fig. 2 and fig. 4, the positive plate body 401 and the negative plate body 403 are respectively pressed on the diaphragm 402, and the positive plate body 401, the diaphragm 402 and the negative plate body 403 are all wound around the fixed edge, wherein the positive plate body 401 is formed by pressing manganese dioxide on a positive current collector (such as a stainless steel mesh or an aluminum foil), and the negative plate body 403 is formed by pressing a lithium belt on a negative current collector (such as a copper foil), so that in a space where a battery is fixed, the contact area of the positive plate and the negative plate is increased, the internal resistance of the battery is prevented from becoming large, and meanwhile, the internal ion migration capacity of the battery is enhanced in a low-temperature state, and the maximization of the discharge efficiency of the battery is realized;

as shown in fig. 1, fig. 3, fig. 4 and fig. 5, the positive electrode tab 3 connected with the lower end of the positive electrode tab body 401 is clamped with the lower metal gasket 2, electrolyte is added into the positive electrode cover 1, the negative electrode cover 8 is pressed downwards from the upper end of the positive electrode cover 1 until the negative electrode tab 11 connected with the upper end of the negative electrode tab body 403 is clamped with the upper metal gasket 10, the lower metal gasket 2 and the upper metal gasket 10 respectively position the connection assembly 4 through the positive electrode tab 3 and the negative electrode tab 11, loose internal winding connection is avoided, the tabs of the positive electrode and the negative electrode are respectively led out from current collectors, meanwhile, the negative electrode cover 8 is clamped with the supporting rods 6, the supporting rods 6 are arranged in one-to-one correspondence with the supporting seats 5, the supporting rods 6 are distributed at equal intervals with the center of the positive electrode cover 1, the supporting seats 5 limit the connection assembly 4, and displacement caused by sliding of internal parts when the battery is avoided.

Finally, it should be noted that: the above is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that the present utility model is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A core-pack low-temperature high-power lithium manganese button cell, comprising:

the positive electrode cover (1), the inside bottom of positive electrode cover (1) is provided with lower metal gasket (2), and the upper end of lower metal gasket (2) installs anodal utmost point ear (3), the upper end of anodal utmost point ear (3) is connected with connection sub-assembly (4), and the middle part outer end of connection sub-assembly (4) is provided with supporting seat (5);

the support rod (6) is arranged at the middle inner end of the positive electrode cover (1), the upper side of the inner end of the positive electrode cover (1) is connected with a rubber ring (7), the inner end of the rubber ring (7) is provided with a negative electrode cover (8), and the inner end of the negative electrode cover (8) is provided with an upper connecting block (9);

the negative electrode lug (11) is arranged at the upper end of the connecting assembly (4), the upper end of the negative electrode lug (11) is connected with the upper metal gasket (10), the lower outer end of the connecting assembly (4) is provided with the lower connecting block (12), and the inside of the lower connecting block (12) is provided with the circulation groove (13).

2. The core-spun, low-temperature, high-power lithium manganese button cell of claim 1, wherein: the lower metal gasket (2) is in opposite clamping connection with the positive electrode lug (3), and the longitudinal section of the lower metal gasket (2) is U-shaped.

3. The core-spun, low-temperature, high-power lithium manganese button cell of claim 1, wherein: the connecting assembly (4) is composed of a positive plate body (401), a diaphragm (402) and a negative plate body (403);

a positive electrode tab body (401) provided at the upper end of the positive electrode tab (3);

a diaphragm (402) connected to the inner end of the positive electrode sheet body (401);

and a negative electrode sheet body (403) mounted on the inner end of the separator sheet (402).

4. A core-in-package low temperature high power lithium manganese button cell according to claim 3, wherein: the positive plate body (401), the diaphragm (402) and the negative plate body (403) are all connected in a winding mode.

5. The core-spun, low-temperature, high-power lithium manganese button cell of claim 1, wherein: the supporting seats (5) are arranged in one-to-one correspondence with the supporting rods (6), the supporting rods (6) are arranged at equal angles relative to the center of the positive electrode cover (1), and the supporting rods (6) are connected with the negative electrode cover (8) in a relatively clamping mode.

6. The core-spun, low-temperature, high-power lithium manganese button cell of claim 1, wherein: the rubber ring (7) is oppositely attached and connected with the positive electrode cover (1).

7. The core-spun, low-temperature, high-power lithium manganese button cell of claim 1, wherein: the flow grooves (13) are symmetrically arranged on the left and right sides of the vertical central axis of the lower connecting block (12), and the diameter size of the lower connecting block (12) is larger than the overall diameter size of the connecting assembly (4).