CN219067127U

CN219067127U - Cover plate assembly and battery thereof

Info

Publication number: CN219067127U
Application number: CN202223449375.5U
Authority: CN
Inventors: 李龙
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-23
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a cover plate component and a battery thereof, wherein the cover plate component comprises: the cover plate body is provided with a first through hole; the fixing seat comprises a body part and a convex edge part, the body part is arranged in the first through hole, the convex edge part is connected to the side part of the body part and is arranged around the edge of the body part, and the body part is provided with a mounting groove and an explosion-proof hole penetrating through the mounting groove; the welding block is arranged on one side of the cover plate body, which is close to the battery shell, and is connected with the fixing seat; the explosion-proof valve, the welding block and the fixing seat are made of the same materials, and the explosion-proof valve is welded in the mounting groove. The cover plate component can fix the explosion-proof valve on the steel shell and the cover plate body, thereby meeting the requirements of production, safety and stability.

Description

Cover plate assembly and battery thereof

Technical Field

The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery thereof.

Background

At present, in order to improve the energy density of the battery, the wall thickness of a battery cell shell is thinner and thinner. A common battery case material is 3-series aluminum, with a melting point temperature of about 600 ℃. The thinner case is easily cracked or burned by the gas generated from the battery cell, and the thermal safety of the battery cannot be ensured. Therefore, some manufacturers start developing steel shells, but the existing explosion-proof valve is made of aluminum materials, cannot be connected with the steel shells and the cover plate body in a welding mode, and is in a research stage, immature and has the problems of uncontrollable explosion-starting pressure and large explosion-starting pressure.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an objective of the present utility model is to provide a cover plate assembly to solve the problem that the explosion-proof valve in the prior art cannot be connected with the steel housing and the cover plate body by welding.

The utility model also aims to provide a battery for applying the cover plate assembly.

A cover plate assembly according to an embodiment of the present utility model includes: the cover plate body is provided with a first through hole; the fixing seat comprises a body part and a convex edge part, the body part is arranged in the first through hole, the convex edge part is connected to the side part of the body part and is arranged around the edge of the body part, a mounting groove is formed in the convex edge part, and an explosion-proof hole penetrating through the body part is formed in the mounting groove; the welding block is arranged on one side, close to the battery shell, of the cover plate body and is connected with the fixing seat; the explosion-proof valve, the explosion-proof valve the welding piece with the material of fixing base is the same, explosion-proof valve welding is in the mounting groove.

According to the cover plate assembly provided by the embodiment of the utility model, the explosion-proof valve is welded in the mounting groove of the fixed seat, the welding block is connected with the fixed seat, and meanwhile, the explosion-proof valve, the welding block and the fixed seat are made of the same materials, so that the explosion-proof valve can be fixed on the steel shell and the cover plate body, and the requirements on production, safety and stability are met.

In some embodiments, a first step part is arranged on the inner wall of the mounting groove, and the explosion-proof valve is stopped on the first step part.

In some embodiments, a second step portion and a third step portion are disposed on an inner wall of the mounting groove, and the second step portion, the first step portion and the third step portion are sequentially disposed along a direction perpendicular to the cover plate body.

In some embodiments, the cover plate assembly further includes a seal ring including a first portion disposed between the body portion and the cover plate body and a second portion connected to and disposed about the first portion, the second portion disposed between the welding block and the cover plate body.

In some embodiments, the seal ring further comprises a third portion connecting and surrounding the second portion, the third portion abutting against a circumferential side of the weld block.

In some embodiments, the cover plate assembly further comprises: the upper plastic part is arranged between the convex edge part and the cover plate body, a groove is formed between the first part and the second part, and the part of the upper plastic part is arranged in the groove.

In some embodiments, an annular groove is formed in one end, close to the upper plastic part, of the fixing seat, an annular boss is arranged on the upper plastic part, and the annular boss abuts against the annular groove.

In some embodiments, the cover plate assembly further comprises: the explosion-proof valve patch is arranged on the fixing seat and covers the mounting groove.

In some embodiments, the cover plate assembly further comprises: the lower plastic part is arranged on one side, far away from the cover plate body, of the welding block and is connected with the cover plate body.

The battery comprises the cover plate assembly.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a cover plate assembly in an embodiment of the utility model;

FIG. 2 is a schematic cross-sectional view of a cover plate assembly in accordance with an embodiment of the present utility model;

FIG. 3 is an enlarged view of section I of FIG. 2 in accordance with the present utility model;

FIG. 4 is a schematic view of a holder according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a seal ring in an embodiment of the utility model;

FIG. 6 is a schematic illustration of an upper molding in an embodiment of the utility model.

Reference numerals:

100. a cover plate assembly;

10. a cover plate body; 101. a first through hole;

20. a fixing seat; 201. a body portion; 202. a convex edge portion; 2021. a first step portion; 2022. a second step portion; 2023. a third step portion; 203. an annular groove;

30. a welding block;

40. an explosion-proof valve;

50. a seal ring; 501. a first portion; 502. a second portion; 5021. a groove; 503. a third section;

60. applying a plastic part; 601. an annular boss;

70. an explosion-proof valve patch;

80. and (5) lower plastic parts.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring now to fig. 1-6, a cover plate assembly 100 according to an embodiment of the present utility model is described.

As shown in fig. 1 and 2, a cap plate assembly 100 according to an embodiment of the present utility model includes: the explosion-proof valve comprises a cover plate body 10, a fixed seat 20, a welding block 30 and an explosion-proof valve 40.

The cover plate body 10 is provided with a first through hole 101; the fixing seat 20 comprises a body part 201 and a convex edge part 202, the body part 201 is arranged in the first through hole 101, the convex edge part 202 is connected to the side part of the body part 201 and is arranged around the edge of the body part 201, a mounting groove is formed on the convex edge part 202, and an explosion-proof hole penetrating through the body part 201 is formed on the mounting groove; the welding block 30 is arranged on one side of the cover plate body 10, which is close to the battery shell, and is connected with the fixed seat 20; the explosion-proof valve 40, the welding block 30 and the fixing base 20 are made of the same materials, and the explosion-proof valve 40 is welded in the mounting groove.

It can be understood that the explosion-proof valve 40 is welded in the explosion-proof hole of the mounting groove of the fixing seat 20, the convex edge 202 in the fixing seat 20 passes through the first through hole 101 on the cover plate body 10 and is connected with the welding block 30 below the cover plate body 10, so that the explosion-proof valve 40, the welding block 30 and the fixing seat 20 are fixed on the cover plate body 10, and meanwhile, the materials of the explosion-proof valve 40, the welding block 30 and the fixing seat 20 are the same, and can be connected through welding, thereby solving the problem that the explosion-proof valve 40 is mounted on the steel cover plate body 10 through welding. It should be noted that, the cover body 10 and the explosion-proof valve 40 are made of two materials with different melting points, and the melting point of the material of the cover body 10 is far greater than that of the material of the explosion-proof valve 40. Meanwhile, the explosion-proof valve 40 is preferably made of aluminum, and the cover plate body 10 is preferably made of stainless steel.

According to the cover plate assembly 100 of the embodiment of the utility model, the explosion-proof valve 40 is welded in the mounting groove of the fixed seat 20, the welding block 30 and the fixed seat 20 are connected with each other, and meanwhile, the explosion-proof valve 40, the welding block 30 and the fixed seat 20 are made of the same materials, so that the explosion-proof valve 40 can be fixed on the steel shell and the cover plate body 10, and the requirements of production, safety and stability are met.

In some embodiments, referring to fig. 4, a first step 2021 is provided on the inner wall of the mounting groove, and the explosion-proof valve 40 is stopped against the first step 2021. It will be appreciated that the explosion proof valve 40 is placed on the first step 2021, thereby better installing the explosion proof valve 40.

In some embodiments, referring to fig. 4, the second step 2022 and the third step 2023 are provided on the inner wall of the mounting groove, and the second step 2022, the first step 2021 and the third step 2023 are sequentially provided in a direction perpendicular to the cover body 10. It will be appreciated that the first step 2021 is provided between the second step 2022 and the third step 2023, and the explosion-proof valve 40 is placed on the first step 2021 such that the explosion-proof valve 40 has a sufficient gap in the up-down direction, so that the force applied to the explosion-proof valve 40 is uniform. The "direction perpendicular to the cover plate body 10" is the up-down direction in fig. 4.

In some embodiments, referring to fig. 2 and 5, the cover assembly 100 further includes a seal ring 50, the seal ring 50 including a first portion 501 and a second portion 502, the first portion 501 being disposed between the body portion 201 and the cover body 10, the second portion 502 being connected to the first portion 501 and disposed around the first portion 501, the second portion 502 being disposed between the solder bump 30 and the cover body 10. It will be appreciated that by the above arrangement, the fixing base 20 and the cover plate body 10 are insulated and sealed axially therebetween.

In some embodiments, referring to fig. 2 and 5, the seal ring 50 further includes a third portion 503, the third portion 503 being connected to the second portion 502 and surrounding the second portion 502, the third portion 503 abutting against a circumferential side of the weld block 30. It will be appreciated that by the above arrangement, the sealing performance of the seal ring 50 is further improved.

In some embodiments, referring to fig. 2 and 6, the cover assembly 100 further includes an upper molding member 60, the upper molding member 60 is disposed between the flange 202 and the cover body 10, a groove 5021 is formed between the first portion 501 and the second portion 502, and a portion of the upper molding member 60 is disposed in the groove 5021. It can be understood that the upper plastic member 60 is provided to insulate the upper end surfaces of the fixing base 20 and the cover body 10 from each other.

In some embodiments, referring to fig. 2 and 6, an annular groove 203 is disposed at an end of the fixing base 20 near the upper plastic part 60, an annular boss 601 is disposed on the upper plastic part 60, and the annular boss 601 abuts against the annular groove 203. It can be understood that through the above arrangement, the fixing base 20 is more stably arranged on the upper plastic part 60, and insulation reliability of the fixing base 20 and the cover plate body 10 is further improved.

In some embodiments, referring to fig. 2, the cover plate assembly 100 further includes an explosion proof valve patch 70, the explosion proof valve patch 70 being disposed on the mounting base 20 and covering the mounting slot. It will be appreciated that by providing the explosion proof valve patch 70, foreign matter is prevented from contaminating the explosion proof valve 40.

In some embodiments, referring to fig. 2, the cover assembly 100 further includes a lower molding member 80, the lower molding member 80 being disposed at a side of the welding block 30 remote from the cover body 10, the lower molding member 80 being connected to the cover body 10. It can be appreciated that the above arrangement makes the overall structure of the cover plate assembly 100 stable and reliable.

A battery according to an embodiment of the present utility model includes the above-described cap plate assembly 100.

One specific embodiment of the cover plate assembly 100 of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1-6, the cover plate assembly 100 includes: the explosion-proof valve comprises a cover plate body 10, a fixed seat 20, a welding block 30, an explosion-proof valve 40, a sealing ring 50, an upper plastic part 60, an explosion-proof valve patch 70 and a lower plastic part 80.

The cover plate body 10 is provided with a first through hole 101; the fixing seat 20 comprises a body part 201 and a convex edge part 202, the body part 201 is arranged in the first through hole 101, the convex edge part 202 is connected to the side part of the body part 201 and is arranged around the edge of the body part 201, a mounting groove is formed on the convex edge part 202, and an explosion-proof hole penetrating through the body part 201 is formed on the mounting groove; the welding block 30 is arranged on one side of the cover plate body 10, which is close to the battery shell, and is connected with the fixed seat 20; the explosion-proof valve 40, the welding block 30 and the fixing base 20 are made of the same materials, and the explosion-proof valve 40 is welded in the mounting groove. The seal ring 50 includes a first portion 501 and a second portion 502, the first portion 501 is provided between the body portion 201 and the cap plate body 10, the second portion 502 is connected to the first portion 501 and provided around the first portion 501, and the second portion 502 is provided between the solder bump 30 and the cap plate body 10. The upper plastic part 60 is disposed between the flange 202 and the cover body 10, a groove 5021 is formed between the first portion 501 and the second portion 502, and a portion of the upper plastic part 60 is disposed in the groove 5021. The explosion-proof valve patch 70 is provided on the fixing base 20 and covers the installation groove. The lower plastic part 80 is arranged at one side of the welding block 30 far away from the cover plate body 10, and the lower plastic part 80 is connected with the cover plate body 10.

The sealing ring 50 further comprises a third portion 503, the third portion 503 being connected to the second portion 502 and surrounding the second portion 502, the third portion 503 being stopped against the circumferential side of the welding block 30. The inner wall of the installation groove is provided with a first step 2021, and the explosion-proof valve 40 is stopped against the first step 2021. The inner wall of the mounting groove is provided with a second step 2022 and a third step 2023, and the second step 2022, the first step 2021 and the third step 2023 are provided in this order in a direction perpendicular to the cover body 10. An annular groove 203 is arranged at one end of the fixed seat 20, which is close to the upper plastic part 60, an annular boss 601 is arranged on the upper plastic part 60, and the annular boss 601 is stopped on the annular groove 203.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, comprising:

the cover plate body is provided with a first through hole;

the fixing seat comprises a body part and a convex edge part, the body part is arranged in the first through hole, the convex edge part is connected to the side part of the body part and is arranged around the edge of the body part, a mounting groove is formed in the convex edge part, and an explosion-proof hole penetrating through the body part is formed in the mounting groove;

the welding block is arranged on one side, close to the battery shell, of the cover plate body and is connected with the fixing seat;

the explosion-proof valve, the explosion-proof valve the welding piece with the material of fixing base is the same, explosion-proof valve welding is in the mounting groove.

2. The cover plate assembly of claim 1, wherein a first step is provided on an inner wall of the mounting groove, and the explosion-proof valve is stopped against the first step.

3. The cover plate assembly according to claim 2, wherein a second step portion and a third step portion are provided on an inner wall of the installation groove, and the second step portion, the first step portion and the third step portion are sequentially provided in a direction perpendicular to the cover plate body.

4. The cover plate assembly of claim 1, further comprising a seal ring comprising a first portion disposed between the body portion and the cover plate body and a second portion connected to and disposed about the first portion, the second portion disposed between the welding block and the cover plate body.

5. The cover plate assembly of claim 4, wherein the seal ring further comprises a third portion that connects to and surrounds the second portion, the third portion abutting against a circumferential side of the weld block.

6. The cover plate assembly of claim 4, further comprising:

the upper plastic part is arranged between the convex edge part and the cover plate body, a groove is formed between the first part and the second part, and the part of the upper plastic part is arranged in the groove.

7. The cover plate assembly according to claim 6, wherein an annular groove is formed in one end, close to the upper plastic part, of the fixing seat, an annular boss is arranged on the upper plastic part, and the annular boss abuts against the annular groove.

8. The cover plate assembly of claim 1, further comprising:

the explosion-proof valve patch is arranged on the fixing seat and covers the mounting groove.

9. The cover plate assembly of claim 1, further comprising:

the lower plastic part is arranged on one side, far away from the cover plate body, of the welding block and is connected with the cover plate body.

10. A battery comprising a cover assembly as claimed in any one of claims 1 to 9.