CN220042049U

CN220042049U - Top patch for battery, cover plate assembly and battery

Info

Publication number: CN220042049U
Application number: CN202321715851.5U
Authority: CN
Inventors: 李龙
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-11-17
Anticipated expiration: 2033-06-30

Abstract

The utility model discloses a top patch for a battery, a cover plate assembly for the battery and the battery. According to the top patch for the battery, provided by the embodiment of the utility model, the notch area is arranged on the top patch, so that the explosion-proof valve can be covered, and the explosion-proof valve can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery, having a simple structure and being easy to construct and being beneficial to reducing the manufacturing cost.

Description

Top patch for battery, cover plate assembly and battery

Technical Field

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

Background

The battery needs to be insulated in the use process so as to ensure the use safety of the battery module and the battery pack. In order to achieve the insulating effect, an insulating layer is generally laid on the outer surface of the shell in the related art, and a top patch is covered on a cover plate of the battery to protect the battery and insulate the battery. In order to prevent the explosion of the battery core caused by fire when the battery core is out of control, an explosion-proof valve is arranged on a battery core cover plate, an explosion-proof valve film is arranged on the outer side of the explosion-proof valve, and electrolyte is prevented from polluting the explosion-proof valve in the battery core manufacturing process.

However, for ease of assembly, there is an assembly gap between the top patch and the explosion proof valve patch, which can expose the cover plate of the cover plate assembly, risking electrical connection to the environment.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present utility model is to provide a top patch for a battery, which can cover an explosion-proof valve and can be ruptured to realize exhaust when the explosion-proof valve is opened, thereby improving the safety of the battery, having a simple structure and easy construction, and being beneficial to reducing the manufacturing cost.

Another object of the utility model is to propose a cover assembly for a battery comprising a top patch as described above.

It is a further object of the present utility model to provide a battery comprising the aforementioned cover plate assembly or top patch.

According to the top patch for the battery, provided by the embodiment of the utility model, the top patch is provided with the notch area which is arranged corresponding to the explosion-proof valve through hole, the notch area is internally provided with the notch, and the depth of the notch is smaller than the thickness of the notch area.

According to the top patch for the battery, provided by the embodiment of the utility model, the notch area is arranged on the top patch, so that the explosion-proof valve can be covered, and the explosion-proof valve can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery, having a simple structure and being easy to construct and being beneficial to reducing the manufacturing cost.

In addition, the top patch for a battery according to the above-described embodiment of the present utility model may have the following additional technical features:

in some examples of the utility model, the score region has a thickness e and the score depth is δ, wherein δ+.e. -0.2mm.

In some examples of the utility model, at least a portion of the score extends from one side of the score zone to an opposite side of the score zone.

In some examples of the utility model, the score comprises a first score line and a second score line, the first score line and the second score line intersecting, and two ends of the first score line extending to opposite sides of the score zone, respectively.

In some examples of the utility model, the first score line and the second score line intersect in a "ten" or "X" shape.

In some examples of the utility model, the score further comprises a third score line that is annular or square extending along the perimeter of the score zone.

In some examples of the utility model, the length of the explosion proof valve through hole is L1, and the width of the explosion proof valve through hole is H1; the length of the scoring area is L2, and the width of the scoring area is H2, wherein L1-0.5mm is less than or equal to L2 and less than or equal to L1+0.5mm; h1-0.5mm is less than or equal to H2 and less than or equal to H1+0.5mm.

According to an embodiment of the present utility model, a cap plate assembly for a battery includes: the cover plate is provided with an explosion-proof valve through hole; the top patch is laminated on the cover plate, and the notch area is opposite to the explosion-proof valve through hole.

According to the cover plate assembly for the battery, disclosed by the embodiment of the utility model, through the application of the top patch, the sealing cover of the explosion-proof valve can be realized, and the explosion-proof valve can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery, and being simple in structure and easy to construct.

In some examples of the present utility model, the cover plate is provided with a first post and a second post, the first post and the second post are spaced on opposite sides of the through hole of the explosion-proof valve, the top patch is further provided with a first through hole and a second through hole, the first through hole and the second through hole are spaced on opposite sides of the notch area, the first post passes through the first through hole, the second post passes through the second through hole, and the top patch is attached to the cover plate along the stacking direction.

In some examples of the utility model, the projected area of the top patch in the stacking direction is greater than or equal to the projected area of the cover plate in the stacking direction.

The battery according to the embodiment of the utility model comprises the top patch for the battery or the cover plate assembly for the battery.

According to the battery provided by the embodiment of the utility model, the explosion-proof valve can be covered by the top patch or the cover plate assembly, and the explosion-proof valve can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery, and the battery has a simple structure and is easy to construct, and the manufacturing cost is reduced.

Drawings

Fig. 1 is a schematic view of a battery in accordance with some embodiments of the utility model;

FIG. 2 is an exploded view of a battery in some embodiments of the utility model;

FIG. 3 is a schematic view of a cover plate according to some embodiments of the utility model;

FIG. 4 is a top view of a cover plate in some embodiments of the utility model;

FIG. 5 is a schematic view of the construction of a top patch according to some embodiments of the present utility model;

FIG. 6 is a schematic view of the construction of a top patch according to other embodiments of the present utility model;

FIG. 7 is a schematic view of the construction of a top patch according to still other embodiments of the present utility model;

fig. 8 is a schematic structural view of a top patch according to still other embodiments of the present utility model.

Reference numerals:

100. a battery; 10. a top patch; 110. a scoring area; 11. a first score line; 12. a second score line; 13. a third score line; 101. a first through hole; 102. a second through hole; 20. a cover plate; 21. an explosion-proof valve; 210. an explosion-proof valve through hole; 201. a first pole; 202. a second post; 22. a pole group; 30. a bottom support plate; 40. a first protective film; 50. a housing; 60. and a second protective film.

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 and intended to explain the present utility model and should not be construed as limiting the utility model.

Referring to fig. 1 to 8, according to the top sheet 10 for a battery of the embodiment of the present utility model, the top sheet 10 may have an effect of protecting the battery 100 and insulation, the explosion-proof valve 21 is adapted to be installed in the explosion-proof valve through hole 210, the top sheet 10 has the score area 110 provided corresponding to the explosion-proof valve through hole 210, and the score area 110 of the top sheet 10 may have an effect of protecting the explosion-proof valve 21, and may prevent the explosion-proof valve 21 from being exposed and from being electrically connected to the outside. Further, a score is provided in the score region 110, and the depth of the score is smaller than the thickness of the score region 110. Thus, the score may be ruptured under predetermined conditions to vent outwardly, venting may be achieved when the explosion-proof valve 21 is opened or the battery is abnormal, and the score does not penetrate the top patch 10, which is advantageous in improving the effect of sealing the explosion-proof valve 21 in the score region 110 in a general state, and the explosion-proof valve 21 may be prevented from being connected to the outside.

According to the top patch 10 for the battery, provided by the embodiment of the utility model, the notch area 110 is arranged on the top patch 10, so that the explosion-proof valve 21 can be covered, and the explosion-proof valve 21 can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery 100, having a simple structure and being easy to construct and being beneficial to reducing the manufacturing cost.

In some embodiments of the present utility model, the score region 110 has a thickness e and a score depth delta, where delta is less than or equal to e-0.2mm, whereby the score remains stable in a normal state such that the score region 110 can cover the vent valve 21 to enhance protection.

Referring to fig. 5 to 8, in some embodiments of the present utility model, at least a portion of the score extends from one side of the score region 110 to the opposite side of the score region 110, which is advantageous for extending the length of the score, so that the score is easier to crack when the explosion-proof valve 21 is opened, and the ventilation area after cracking is larger, which is advantageous for improving the ventilation effect.

In some embodiments of the present utility model, referring to fig. 6 to 8, the score includes a first score line 11 and a second score line 12, which can increase the ventilation area when the score is ruptured, and the first score line 11 and the second score line 12 cross each other, so that when one of the first score line 11 or the second score line 12 is ruptured, the impact force can be more easily transferred to the other score line, so that the score is ruptured, and both ends of the first score line 11 extend to opposite sides of the score area 110 respectively, so that the score line can be prolonged, and the vent effect after the rupture can be improved, so that the score line is easy to rupture, and the phenomenon that the score line cannot be ruptured when the explosion-proof valve 21 is opened is avoided.

Referring to fig. 6 to 8, in some embodiments of the present utility model, the first score line 11 and the second score line 12 intersect to form a cross shape or an X shape, so as to facilitate the transmission of impact force, improve the cracking effect when the first score line 11 and the second score line 12 crack, and facilitate the manufacturing.

In some embodiments of the present utility model, referring to fig. 5, 6 and 8, the score further includes a third score line 13, and the third score line 13 has a ring shape or a square shape extending along the circumference of the score region 110, so as to improve the degassing effect when the score is ruptured. Specifically, the third score line 13 may be determined according to the shape of the score region 110, for example, the score region 110 is circular, oval, square, or according to the shape of the vent hole 210 of the explosion-proof valve, etc., the third score line 13 is disposed along the periphery of the score region 110, so that the length of the third score line 13 may be extended, and in addition, when the third score line 13 is split, the periphery of the score region 110 disposed corresponding to the explosion-proof valve 21 may be fully split, which is beneficial to improving the venting capacity and improving the venting uniformity.

Further, referring to fig. 6 and 8, the score region 110 may have a first score line 11, a second score line 12 and a third score line 13 at the same time, wherein the third score line 13 extends along the circumference of the score region 110, two ends of the first score line 11 and the second score line 12 extend to the circumference of the score region 110, respectively, and two ends of the first score line 11 and the second score line 12 are connected to the third score line 13, respectively, and the first score line 11 and the second score line 12 cross at the middle region of the score region 110, for example, cross in a "ten" shape or an "X" shape. In this way, the first score line 11, the second score line 12 and the third score line 13 may be disposed at various regions of the score region 110 so as to be ruptured under predetermined conditions, and when a certain score line is partially ruptured, impact force may be transmitted to other score lines connected to the score line, thereby facilitating rapid opening of the score region 110 to improve the degassing effect. When the explosion-proof valve 21 is opened, or when the explosion-proof valve 21 is abnormal, for example, in the case of local overheating, a plurality of score lines are arranged in the score region 110, so that the sensitivity of the score region 110 is higher, the feedback efficiency is improved, and the safety of the battery 100 is improved.

Referring to fig. 3 and 4, in some embodiments of the present utility model, the length of the explosion proof valve through hole 210 is L1, and the width of the explosion proof valve through hole 210 is H1; the length of the scoring area 110 is L2, and the width of the scoring area 110 is H2, wherein L1-0.5mm is less than or equal to L2 and less than or equal to L1+0.5mm; h1-0.5mm is less than or equal to H2 and less than or equal to H1+0.5mm. That is, the size of the score area 110 is relatively close to the size of the explosion-proof valve through hole 210, so that the protection, insulation and exhaust effects can be improved, and a certain error may exist between the size of the score area 110 and the size of the explosion-proof valve through hole 210, so that the processing and the manufacturing are facilitated. Thus, the top patch 10 can be ensured to cover the upper surface of the cover plate 20, the notch area 10 can cover the upper surface of the explosion-proof valve 21, insulation from the outside is realized, and the notch area 110 can be ensured to crack or burst when the explosion-proof valve 21 is opened, so that the exhaust is smooth. Specifically, the top patch 10 may be adhered to the cover sheet 20, and the scored area 110 covers the vent hole 210 of the cover sheet 20. If the size of the score area 110 is larger than the explosion-proof valve through hole 210, the bonding area is larger, the bonding force is stronger, and the impact force when the explosion-proof valve 21 is opened may be smaller than the bonding force, so that the score on the score area 110 cannot be cracked, thereby affecting the exhaust.

Of course, during practical application, the size can be adjusted according to practical application conditions, so that when the explosion-proof valve 21 is opened, the notch area 110 can be cracked, and the opened exhaust area is moderate, thereby being beneficial to increasing the exhaust space and improving the exhaust effect, and further improving the safety of the battery 100 during use.

Referring to fig. 1 to 8, a cap plate assembly for a battery according to an embodiment of the present utility model includes: the cover plate 20 and the top patch 10 are provided with the explosion-proof valve through hole 210, and the explosion-proof valve 21 can be installed in the explosion-proof valve through hole 210, so that the explosion-proof valve 21 can be assembled. The top patch 10 is laminated on the cover plate 20, and can play a role in protection and insulation, wherein the scored area 110 is opposite to the explosion-proof valve through hole 210, so that the scored area 110 can cover the explosion-proof valve 21 in the explosion-proof valve through hole 210, and the protection effect and the exhaust effect are improved.

According to the cover plate assembly for the battery, disclosed by the embodiment of the utility model, by applying the top patch 10, the cover of the explosion-proof valve 21 can be realized, and the explosion-proof valve 21 can be cracked when being opened so as to realize exhaust, thereby being beneficial to improving the safety of the battery 100, and being simple in structure, easy to construct and beneficial to reducing the manufacturing cost.

In the related art, a through hole is arranged on the top patch, and an explosion-proof valve film is arranged on the explosion-proof valve to protect the explosion-proof valve. During assembly, an assembly gap exists between the top patch and the explosion-proof valve film, the assembly gap can expose the cover plate, the risk of being electrically connected with the outside exists, and the process and materials for manufacturing the cover plate are increased due to the fact that the explosion-proof valve film is stuck on the explosion-proof valve, and accordingly cost is increased. In the present utility model, by providing the notch area 110 on the top patch 10, the notch area 110 covers the explosion-proof valve 21, so that the top patch through hole and the explosion-proof valve film in the related art are not required to be provided, and the top patch 10 can be integrally covered on the cover plate 20, so that the assembly gap is not existed during the assembly, and the safety of the battery 100 is improved. In addition, the score on the score area 110 may be ruptured to vent when the explosion proof valve 21 is opened, so as to achieve the effect of explosion proof valve lamination in the related art, and the explosion proof valve lamination may be omitted. Thus, the top sheet 10 of the present utility model can improve the assembly effect, simplify the structure of the battery 100, facilitate the improvement of the safety of the battery 100, and reduce the manufacturing cost.

In some embodiments of the present utility model, the cover 20 is provided with the first pole 201 and the second pole 202, the first pole 201 and the second pole 202 are disposed at opposite sides of the through hole 210 of the explosion-proof valve at intervals, the top patch 10 is further provided with the first through hole 101 and the second through hole 102, the first through hole 101 and the second through hole 102 are disposed at opposite sides of the scoring area 110 at intervals, the first pole 201 passes through the first through hole 101, the second pole 202 passes through the second through hole 102, and the top patch 10 is attached to the cover 20 along the lamination direction, so that the matching effect of the cover 20 and the top patch 10 can be improved, and the overall structural compactness and stability of the battery 100 can be improved.

In some embodiments of the present utility model, the projected area of the top patch 10 along the stacking direction is greater than or equal to the projected area of the cover plate 20 along the stacking direction, so that the top patch 10 can completely cover the cover plate 20, avoiding gaps between the top patch 10 and the cover plate 20 after assembly, and avoiding the risk of electrical connection with the outside.

Referring to fig. 1 and 2, according to the battery 100 of the embodiment of the present utility model, the battery 100 further includes a pole group 22, a bottom plate 30, a first protective film 40, a case 50, and a second protective film 60. Specifically, the top sheet 10, the cover plate 20, the pole group 22, the bottom plate 30, the first protective film 40, the case 50, and the second protective film 60 may be assembled to be connected in order in the lamination direction to form the battery 100. The first protective film 40 wraps around the pole group 22 and is housed in the case 50 together with the pole group 22, with the bottom plate 30 between the pole group 22 and the case 50.

More specifically, the second protective film 60 covers the outer surface of the housing 50 and partially covers the cover assembly. Alternatively, the first protective film 40 may be a mylar film and the second protective film 60 may be a blue film. The lamination direction may be the up-down direction.

According to the battery 100 of the embodiment of the utility model, the top patch 10 for the battery or the cover plate assembly for the battery is included, and by applying the top patch 10 or the cover plate assembly on the battery 100, the explosion-proof valve 21 can be covered, and the explosion-proof valve 21 can be cracked when being opened to realize the exhaust, so that the safety of the battery 100 is improved, the structure is simple and easy to construct, and the manufacturing cost is reduced.

In the description of the present utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question 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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The top patch for the battery is characterized in that a notch area corresponding to the explosion-proof valve through hole is formed in the top patch, a notch is formed in the notch area, and the depth of the notch is smaller than the thickness of the notch area.

2. The top patch for a battery of claim 1, wherein the score region has a thickness e and the score depth δ, wherein δ is +.e-0.2 mm.

3. The top patch for a battery of claim 1, wherein at least a portion of the score extends from one side of the score zone to an opposite side of the score zone.

4. A top patch for a battery according to claim 3, wherein said score comprises a first score line and a second score line, said first score line intersecting said second score line, and wherein two ends of said first score line extend to opposite sides of said score zone, respectively.

5. The top patch for a battery of claim 4, wherein the first score line and the second score line intersect in a "ten" or "X" shape.

6. The top patch for a battery of any one of claims 1-5, wherein the score further comprises a third score line that is annular or square extending along a perimeter of the score zone.

7. The top sheet for a battery according to any one of claims 1 to 5, wherein the length of the explosion-proof valve through hole is L1, and the width of the explosion-proof valve through hole is H1; the length of the scoring area is L2, and the width of the scoring area is H2, wherein L1-0.5mm is less than or equal to L2 and less than or equal to L1+0.5mm; h1-0.5mm is less than or equal to H2 and less than or equal to H1+0.5mm.

8. A cover assembly for a battery, comprising:

the cover plate is provided with an explosion-proof valve through hole;

a top patch according to any one of claims 1 to 7, the top patch being laminated to the cover plate, the scored area being directly opposite the vent hole of the explosion proof valve.

9. The cover plate assembly for a battery according to claim 8, wherein a first post and a second post are provided on the cover plate, the first post and the second post are provided at opposite sides of the explosion-proof valve through hole at intervals, the top patch is further provided with a first through hole and a second through hole, the first through hole and the second through hole are provided at opposite sides of the score zone at intervals, the first post passes through the first through hole, the second post passes through the second through hole, and the top patch is attached to the cover plate along the lamination direction; and/or

The projection area of the top patch along the stacking direction is larger than or equal to the projection area of the cover plate along the stacking direction.

10. A battery comprising a top patch for a battery according to any one of claims 1 to 7 or a cover plate assembly for a battery according to claim 8 or 9.