CN213546422U

CN213546422U - Explosion-proof valve protection paster, secondary battery and car

Info

Publication number: CN213546422U
Application number: CN202022648951.3U
Authority: CN
Inventors: 何金磊
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-25
Anticipated expiration: 2030-11-16

Abstract

An embodiment of the utility model provides an explosion-proof valve protection paster, secondary battery and car relates to the secondary battery field. This explosion-proof valve protection paster includes protection paster body and ring flange, and the protection paster body has relative first surface and second surface, is provided with the air vent that runs through first surface and second surface on the protection paster body, and ring flange sets up in the first surface, and the air vent runs through ring flange, and the second surface is used for laminating with explosion-proof valve. The embodiment of the utility model provides an explosion-proof valve protection paster can avoid or reduce electrolyte and dip the explosion-proof valve to avoid the protection paster inefficacy because of the high pressure causes.

Description

Explosion-proof valve protection paster, secondary battery and car

Technical Field

The utility model relates to a secondary battery field particularly, relates to an explosion-proof valve protection paster, secondary battery and car.

Background

The existing explosion-proof valve protection patch protects the immersion of electrolyte and simultaneously forms a cavity together with the explosion-proof valve. Under the condition that high temperature heating can appear at electricity core stoving or ageing etc. this air cavity can expand in the heating process, leads to the protection paster to be arched, drops even, leads to spare part impaired.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof valve protection paster, secondary battery and car, it can avoid or reduce electrolyte and dip the explosion-proof valve to avoid becoming invalid because of the protection paster that the high pressure caused.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides an explosion-proof valve protection paster for laminate with explosion-proof valve, explosion-proof valve protection paster includes protection paster body and ring flange, protection paster body has relative first surface and second surface, be provided with on the protection paster body and run through the first surface with the air vent of second surface, ring flange set up in the first surface, just the air vent runs through ring flange, the second surface be used for with the laminating of explosion-proof valve.

The embodiment of the utility model provides an in, this explosion-proof valve protection paster when the condition of heating appears in electric core, if ageing, high temperature toasts etc. gas thermal expansion can be along setting up the air vent exhaust on protection paster body to reach the unanimous effect of inside and outside atmospheric pressure, be favorable to avoiding producing pressure differential too big, lead to the paster inefficacy. In addition, when electrolyte splashes from the liquid injection hole, even if a small amount of electrolyte falls on the anti-explosion valve protection patch, the side edge of the annular flange can shield most of the electrolyte on the two sides. And for the electrolyte which is individually dropped near the vent hole, the electrolyte is attached to the annular flange due to the surface tension of the electrolyte, and cannot enter the explosion-proof valve along the vent hole. That is to say, the embodiment of the utility model provides a can effectively prevent electrolyte and dip, also can avoid inside cavity atmospheric pressure too big, the spare part that leads to is impaired.

In an alternative embodiment, the vent is centrally located in the protective patch body.

In an alternative embodiment, the central axis of the annular flange coincides with the central axis of the vent hole.

In an alternative embodiment, the shape of the annular flange comprises a circle or a square, and the vent hole is shaped to conform to the annular flange.

In an alternative embodiment, the annular flange is integrally formed with the protective patch body.

In an alternative embodiment, the protective patch body is a PET flat film.

In an alternative embodiment, the annular flange and the protective patch body form an arc transition therebetween; or the annular flange and the first surface form an included angle.

In an alternative embodiment, the annular flange projects relative to the first surface by a height in the range of greater than or equal to 0.2 mm.

In a second aspect, the present invention provides a secondary battery, a battery main body, an explosion-proof valve and an explosion-proof valve protection patch as in any one of the above embodiments, wherein the explosion-proof valve is disposed on the battery main body, and the first surface is attached to the explosion-proof valve.

In the embodiment of the utility model provides an in, the laminating has foretell explosion-proof valve protection paster on secondary cell's the explosion-proof valve. The explosion-proof valve protection patch comprises a protection patch body, and an air vent and an annular flange which are arranged on the protection patch body. When the condition of heating appears in electric core, if ageing, high temperature toast etc. gas is heated the inflation, can be along setting up the air vent exhaust on the protection paster body to reach the unanimous effect of inside and outside atmospheric pressure, be favorable to avoiding producing pressure differential too big, lead to the paster to become invalid. In addition, when electrolyte splashes from the liquid injection hole, even if a small amount of electrolyte falls on the anti-explosion valve protection patch, the side edge of the annular flange can shield most of the electrolyte on the two sides. And for the electrolyte which is individually dropped near the vent hole, the electrolyte is attached to the annular flange due to the surface tension of the electrolyte, and cannot enter the explosion-proof valve along the vent hole. That is to say, the embodiment of the utility model provides a can effectively prevent electrolyte and dip, also can avoid inside cavity atmospheric pressure too big, the spare part that leads to is impaired.

In a third aspect, the present invention provides an automobile including the secondary battery according to the foregoing embodiment.

The automobile comprises the secondary battery, and the beneficial effects of the secondary battery at least comprise the beneficial effects of the secondary battery, namely the immersion of the electrolyte can be effectively prevented, and the internal and external air pressures can be balanced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an explosion-proof valve protection patch according to an embodiment of the present invention when applied to a secondary battery;

fig. 2 is a schematic structural view of an explosion-proof valve protection patch according to an embodiment of the present invention;

FIG. 3 is a schematic view of the explosion-proof valve protection patch of FIG. 2 from another perspective;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic structural view of the annular flange of FIG. 2;

fig. 6 is a schematic cross-sectional view of the explosion-proof valve protection patch of fig. 4.

Icon: 100-explosion-proof valve protection patch; 110-a protective patch body; 111-a first surface; 112-a second surface; 113-a vent; 120-an annular flange; 200-an explosion-proof valve; 300-a top cover; 400-pole; 500-liquid injection hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, an embodiment of the present invention provides an explosion-proof valve protection patch 100. The explosion-proof valve protection patch 100 is used for being attached to an explosion-proof valve 200 and can play a role in protection. The embodiment of the utility model provides an explosion-proof valve protection paster 100 can avoid inside cavity atmospheric pressure too big when effectual prevention electrolyte is immersed, and the spare part that leads to is impaired.

It should be understood that the explosion-proof valve 200 according to the embodiment of the present invention may be an explosion-proof valve 200 on a secondary battery, and the secondary battery may be applied to and provide power for an electric device. For example, the secondary battery is applied to a new energy automobile, and the new energy automobile can be powered by the secondary battery. The top cap 300 of the secondary battery is provided with an explosion-proof valve 200, a liquid injection hole 500, and a post 400, and the explosion-proof valve protection patch 100 is attached to the explosion-proof valve 200.

In the embodiment of the present invention, the explosion-proof valve protection patch 100 includes a protection patch body 110 and an annular flange 120, the protection patch body 110 has a first surface 111 and a second surface 112 opposite to each other, an air vent 113 is disposed on the protection patch body 110 and runs through the first surface 111 and the second surface 112, the annular flange 120 is disposed on the first surface 111, the air vent 113 runs through the annular flange 120, and the second surface 112 is used for being attached to the explosion-proof valve 200.

It should be noted that in the embodiment of the present invention, this explosion-proof valve protection patch 100, when the condition of heating appears in electric core, like ageing, high temperature toasts etc. gas thermal expansion can be along setting up the air vent 113 exhaust on protection patch body 110 to reach the unanimous effect of inside and outside atmospheric pressure, be favorable to avoiding producing the pressure differential too big, lead to the patch to become invalid. In addition, when the electrolyte is sprayed from the liquid inlet 500, even if a small amount of electrolyte falls on the explosion-proof valve protection patch 100, the side edge of the annular flange 120 shields most of the electrolyte on both sides. The electrolyte falling near the vent hole 113 is attached to the annular flange 120 due to the surface tension of the electrolyte itself, and does not enter the explosion-proof valve 200 along the vent hole 113. That is to say, the embodiment of the utility model provides a can effectual prevention electrolyte dip, also can avoid inside cavity atmospheric pressure too big, the spare part that leads to is impaired.

Optionally, the annular flange 120 is generally shaped as a ring structure, and the vent hole 113 extends through the protective patch body 110 and the annular flange 120. The ring structure of the annular flange 120 may be a circular ring structure, a square ring structure, or another ring structure. The embodiment of the present invention does not require the specific shape of the annular flange 120.

Further, in the embodiment shown in fig. 2, the annular flange 120 has a circular ring-shaped structure.

Optionally, the vent 113 is located in the center of the protective patch body 110. That is, the vent hole 113 is formed at the center of the protection patch body 110, and the position of the vent hole 113 substantially corresponds to the vent hole of the explosion-proof valve 200.

Note that the vent hole 113 being located at the center of the protection patch body 110 means that the center of the protection patch body 110 is located inside the vent hole 113; the shape of the vent hole 113 may not be required, and when the vent hole 113 is a regular shape, for example: circular, square, rectangular, rhombus, regular polygon, etc., and the central axis of the annular flange 120 may or may not coincide with the central axis of the vent hole 113.

As shown in fig. 3, in the embodiment of the present invention, the center of the protection patch body 110 substantially coincides with the center of the vent 113, so that the adhesion force when the protection patch body 110 is attached to the explosion-proof valve 200 is substantially maintained uniform, and the failure probability of the explosion-proof valve protection patch 100 is reduced.

Further, the shape of the annular flange 120 includes a circle or a square, and the vent holes 113 have a shape conforming to the annular flange 120. In the embodiment shown in fig. 5, the annular flange 120 is substantially circular, and the ventilation holes 113 may be circular. The protection patch body 110 is substantially rectangular and has rounded corners or arcs at the corners.

In an alternative embodiment, the annular flange 120 is integrally formed with the protective patch body 110. In this case, the protection patch body 110 may be a PET flat film (abbreviated as PET, polyester resin).

Optionally, when manufacturing the explosion-proof valve protection patch 100 provided by the embodiment of the present invention, an opening, i.e. a vent hole, may be formed on the PET flat film, and then the annular flange 120 is formed by a thermal shrinkage molding process. Of course, without limitation, in other embodiments of the present invention, the manufacturing of the explosion-proof valve protection patch 100 may be realized by other processes.

Optionally, an arc-shaped transition is formed between the annular flange 120 and the protection patch body 110; alternatively, the annular flange 120 is disposed at an angle to the first surface 111. In fig. 4 and 6, the annular flange 120 transitions arcuately with the body 110 of the protective patch, or the annular flange 120 is radiused with the first surface 111.

In an alternative embodiment, the annular flange 120 protrudes relative to the first surface 111 by a height in a range greater than or equal to 0.2 mm for better electrolyte-shielding.

The utility model provides a secondary battery, battery subject, explosion-proof valve 200 and as any one of the explosion-proof valve protection paster 100 in the aforesaid embodiment, explosion-proof valve 200 sets up on battery subject, and first surface 111 is laminated on explosion-proof valve 200.

The utility model provides an automobile, including secondary battery as aforementioned embodiment. The automobile can be a new energy automobile and the like, and the secondary battery can provide power for the new energy automobile.

Referring to fig. 1 to fig. 6, an embodiment of the present invention provides an explosion-proof valve protection patch 100, a secondary battery, and an automobile: the explosion proof valve protection patch 100 includes a protection patch body 110, and a vent hole 113 and an annular flange 120 provided on the protection patch body 110. When the condition of heating appears in electric core, if ageing, high temperature toast etc. gas is heated the inflation, can be along setting up the air vent 113 exhaust on protection paster body 110 to reach the unanimous effect of inside and outside atmospheric pressure, be favorable to avoiding producing pressure differential too big, lead to the paster inefficacy. In addition, when the electrolyte is sprayed from the liquid inlet 500, even if a small amount of electrolyte falls on the explosion-proof valve protection patch 100, the side edge of the annular flange 120 shields most of the electrolyte on both sides. The electrolyte falling near the vent hole 113 is attached to the annular flange 120 due to the surface tension of the electrolyte itself, and does not enter the explosion-proof valve 200 along the vent hole 113. That is to say, the embodiment of the utility model provides a can effectively prevent electrolyte and dip, also can avoid inside cavity atmospheric pressure too big, the spare part that leads to is impaired. The secondary battery and the automobile both comprise the explosion-proof valve protection patch 100, so that the invasion of electrolyte can be prevented, the internal pressure and the external pressure can be balanced, and the damage of battery parts caused by overlarge pressure can be avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an explosion-proof valve protection patch for laminate with explosion-proof valve (200), its characterized in that, explosion-proof valve protection patch (100) is including protection patch body (110) and ring flange (120), protection patch body (110) have relative first surface (111) and second surface (112), be provided with on protection patch body (110) and run through first surface (111) with air vent (113) of second surface (112), ring flange (120) set up in first surface (111), just air vent (113) run through ring flange (120), second surface (112) be used for with explosion-proof valve (200) laminate.

2. Explosion proof valve protection patch according to claim 1, characterized in that the vent hole (113) is located in the center of the protection patch body (110).

3. Explosion proof valve protection patch according to claim 1 or 2 characterized in that the central axis of the annular flange (120) coincides with the central axis of the vent hole (113).

4. An explosion vent valve protection patch as recited in claim 1, wherein the shape of the annular flange (120) comprises a circle or a square, and the vent hole (113) is shaped to conform to the annular flange (120).

5. An explosion vent protection patch as recited in claim 1, wherein the annular flange (120) is integrally formed with the protection patch body (110).

6. Explosion-proof valve protection patch according to claim 5, characterized in that the protection patch body (110) is a PET planar film.

7. An explosion proof valve protection patch as claimed in claim 5 or 6 wherein the transition between the annular flange (120) and the protection patch body (110) is arcuate; alternatively, the annular flange (120) is disposed at an angle to the first surface (111).

8. An anti-explosion valve protection patch as claimed in claim 1, wherein the annular flange (120) projects relative to the first surface (111) by a height in the range of greater than or equal to 0.2 mm.

9. A secondary battery characterized by a battery main body, an explosion-proof valve (200), and the explosion-proof valve protection patch (100) of any one of claims 1 to 8, the explosion-proof valve (200) being disposed on the battery main body, the first surface (111) being attached to the explosion-proof valve (200).

10. An automobile characterized by comprising the secondary battery according to claim 9.