Anti-corrosion lithium battery cell

Abstract

The utility model discloses an anti-corrosion lithium battery cell which comprises a lithium battery cell shell, a lithium battery cell body is arranged inside the lithium battery cell shell, an anti-corrosion cavity is wrapped outside the lithium battery cell body, the inside of the anti-corrosion cavity is designed to be of a hollow structure, inert gas is filled inside the anti-corrosion cavity, and the inert gas is one or more of helium, neon, argon, krypton and xenon. An anti-corrosion cavity is formed in the lithium battery core shell, an inner buffer layer wraps the anti-corrosion cavity, the inner buffer layer is filled with a plurality of soft rubber particles, the soft rubber particles are hollow spherical rubber particles, an anti-explosion shell wraps the lithium battery core shell, and a plurality of heat dissipation grooves which are linearly distributed at equal intervals are formed in the outer wall of the periphery of the anti-explosion shell. The lithium battery core disclosed by the utility model has better anti-corrosion and anti-explosion characteristics, is high in use safety, long in service life, simple in overall structure, low in manufacturing cost and suitable for popularization and use, and effectively reduces potential safety hazards caused by corrosion and explosion.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery cells, in particular to an anti-corrosion lithium battery cell. Background Art

[0002] Lithium batteries are favored by users at home and abroad for their good safety performance, thin thickness, flexible design and low cost. They combine the basic electrochemical properties of liquid lithium batteries with the unique advantages of polymer lithium batteries in appearance and packaging. They use a liquid electrolyte similar to that of liquid lithium batteries as the medium for lithium ion transmission between the positive and negative electrodes. Packaging reliability is one of the indicators of excellent performance of lithium batteries.

[0003] In the existing lithium battery production process, most of the thermal packaging process is used to achieve battery cell sealing. During the packaging or subsequent folding process, the packaging film is often damaged, causing the packaging film to directly contact the electrolyte to form an ion transmission channel, causing corrosion of the packaging film, affecting the normal use of the battery cell, and at the same time, the damaged battery is prone to short circuit explosion when used, affecting safety. Utility Model Content

[0004] The purpose of the present invention is to provide a corrosion-resistant lithium battery cell to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a corrosion-resistant lithium battery cell, comprising a lithium battery cell shell, a lithium battery cell body being arranged inside the lithium battery cell shell, a corrosion-resistant cavity being wrapped around the outside of the lithium battery cell body, the interior of the corrosion-resistant cavity being a hollow structure, the corrosion-resistant cavity being filled with an inert gas, the inert gas being one or more of helium, neon, argon, krypton, and xenon, an inner buffer layer being wrapped around the outside of the corrosion-resistant cavity, a plurality of soft rubber particles being filled inside the inner buffer layer, the soft rubber particles being hollow spherical rubber particles, the lithium battery cell shell being wrapped around the outside of the explosion-proof shell body, and a plurality of equally spaced linearly distributed heat dissipation grooves being provided on the outer walls around the explosion-proof shell body.

[0006] Preferably, an upper sealing end cover is fixedly mounted on the upper surface of the lithium battery cell housing, and an information identification area is provided in the middle of the upper surface of the upper sealing end cover.

[0007] Preferably, the information identification area is a square identification frame.

[0008] Preferably, one side of the upper surface of the lithium battery cell is electrically connected to a positive electrode post, and the other side of the upper surface of the lithium battery cell is electrically connected to a negative electrode post.

[0009] Preferably, the top ends of the positive electrode column and the negative electrode column are both arranged to pass through the upper sealing end cover.

[0010] Preferably, the outside of the positive electrode column and the negative electrode column are both covered with an insulating sheath, and the insulating sheath is fixedly mounted on the upper surface of the upper sealing end cover.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model is provided with an anti-corrosion cavity, which increases the area of ​​the electrolyte corrosion reaction, thereby increasing the time for the complete reaction of the corrosion reaction and reducing the efficiency of the corrosion reaction. The anti-corrosion cavity is filled with an inert gas, which effectively hinders the corrosion reaction, thereby effectively achieving the anti-corrosion effect of the utility model, avoiding corrosion and damage of the lithium battery core, and increasing the overall service life and safety of the lithium battery core. In addition, due to the presence of the anti-corrosion cavity, when the electrolyte leaks, the distance the liquid flows becomes longer, reducing the risk of leakage, and having the use characteristic of internal corrosion protection.

[0013] Among them, the utility model is coated with an anti-corrosion coating on the outside of the lithium battery shell. The external anti-corrosion coating can effectively protect the outside of the lithium battery from corrosion. By cooperating with the use of the anti-corrosion cavity, the utility model has the characteristics of internal and external dual corrosion protection, greatly reducing corrosion, improving the use effect and overall service life;

[0014] At the same time, the inner buffer layer can provide a certain force buffer for the external impact force when the lithium battery shell is subjected to external impact, and has a good force buffering effect, thereby effectively protecting the internal lithium battery body from damage due to impact, improving the protection performance, and the inner buffer layer and the anti-corrosion cavity can provide a buffer cavity for the deformation caused by the impact, avoiding the deformation effect directly acting on the lithium battery body, better protecting the lithium battery body from the outside, and reducing economic losses;

[0015] The explosion-proof outer shell can effectively improve the structural strength of the lithium battery shell, and the wrapped explosion-proof shell design can effectively provide all-round explosion-proof protection for the internal lithium battery, with a certain explosion-proof effect, which can effectively avoid the splashing of fragments caused by short-circuit explosions, and better provide explosion-proof protection to the outside world. At the same time, the heat dissipation groove can dissipate the internal heat in time, which has a certain heat dissipation effect and improves the overall performance of the shell.

[0016] To sum up, through the coordinated use of the above-mentioned structure, the lithium battery cell of the present invention has good corrosion resistance and explosion-proof properties, high safety in use, effectively reduces the safety hazards caused by corrosion and explosion, has a long service life, and has a simple overall structure and low manufacturing cost, making it suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the overall external structure of a lithium battery cell according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the bottom structure of a lithium battery cell according to an embodiment of the present invention when viewed from above;

[0019] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the lithium battery shell of an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal particle structure of the inner buffer layer of an embodiment of the present utility model.

[0021] In the figure: 1. Lithium battery cell shell; 101. Lithium battery cell body; 2. Explosion-proof outer shell; 3. Upper sealed end cap; 4. Positive electrode; 5. Negative electrode; 6. Information identification area; 7. Heat dissipation groove; 8. Anti-corrosion cavity; 9. Inner buffer layer; 10. Soft rubber particles. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] See also Figure 1-4The utility model provides an embodiment: an anti-corrosion lithium battery cell, including a lithium battery cell shell 1, the outer surface of the lithium battery cell shell 1 is coated with an anti-corrosion coating, a lithium battery cell body 101 is provided inside the lithium battery cell shell 1, the outer surface of the lithium battery cell body 101 is wrapped with an anti-corrosion cavity 8, the interior of the anti-corrosion cavity 8 is a hollow structure design, and the interior of the anti-corrosion cavity 8 is filled with an inert gas, and the inert gas is one or more of helium, neon, argon, krypton, and xenon;

[0026] This structural design, the utility model is provided with an anti-corrosion cavity 8, so that the area of ​​the electrolyte corrosion reaction is increased, thereby increasing the time for the complete reaction of the corrosion reaction and reducing the efficiency of the corrosion reaction, and the anti-corrosion cavity 8 is filled with an inert gas, which effectively hinders the corrosion reaction, thereby effectively achieving the anti-corrosion effect of the utility model, avoiding corrosion and damage of the lithium battery core, and improving the overall service life and safety of the lithium battery core. In addition, due to the presence of the anti-corrosion cavity 8, when the electrolyte leaks, the distance the liquid flows becomes longer, reducing the risk of leakage, and having the use characteristics of internal corrosion protection;

[0027] Among them, the utility model is coated with an anti-corrosion coating on the outside of the lithium battery shell 1. The external anti-corrosion coating can effectively protect the outside of the lithium battery from corrosion. By cooperating with the use of the anti-corrosion cavity 8, the utility model has the characteristics of dual internal and external corrosion protection, greatly reducing corrosion, improving the use effect and overall service life;

[0028] The outside of the anti-corrosion cavity 8 is wrapped with an inner buffer layer 9, and the inside of the inner buffer layer 9 is filled with a plurality of soft rubber particles 10. The soft rubber particles 10 are hollow spherical rubber particles. When the lithium battery shell 1 is subjected to an external impact, the soft rubber particles 10 inside can buffer the external impact force to a certain extent, and have a good force buffering effect. This can effectively protect the internal lithium battery body 101 from damage by the impact, improve the protection performance, and the inner buffer layer 9 and the anti-corrosion cavity 8 can provide a buffer cavity for the deformation caused by the impact, thereby preventing the deformation effect from directly acting on the lithium battery body 101, better protecting the lithium battery body 101 from the outside, and reducing economic losses.

[0029] The outside of the lithium battery cell shell 1 is wrapped with an explosion-proof shell body 2, and a number of equally spaced linearly distributed heat dissipation grooves 7 are provided on the outer walls around the explosion-proof shell body 2. The explosion-proof shell body 2 can effectively improve the structural strength of the lithium battery cell shell 1, and the wrapped explosion-proof shell design can effectively provide all-round explosion-proof protection for the internal lithium battery cell, has a certain explosion-proof effect, can effectively avoid the splashing of fragments caused by short-circuit explosions, and better provide explosion-proof protection to the outside world. At the same time, the heat dissipation grooves 7 can be used to dissipate the internal heat in time, have a certain heat dissipation effect, and improve the overall performance of the shell.

[0030] In this embodiment, an upper sealing end cap 3 is fixedly mounted on the upper surface of the lithium battery cell housing 1, and an information marking area 6 is provided in the middle of the upper surface of the upper sealing end cap 3;

[0031] Furthermore, the information identification area 6 is a square identification frame, and an identification sticker for prompting lithium battery information can be pasted through the information identification area 6, thereby improving usage effect and recognition.

[0032] In this embodiment, in order to ensure the normal use of the lithium battery cell 101, one side of the upper surface of the lithium battery cell 101 is electrically connected to the positive electrode post 4, and the other side of the upper surface of the lithium battery cell 101 is electrically connected to the negative electrode post 5;

[0033] The top ends of the positive electrode column 4 and the negative electrode column 5 are both provided through the upper sealing end cover 3;

[0034] Furthermore, in order to insulate the bottoms of the positive electrode column 4 and the negative electrode column 5 and avoid short circuit due to contact of the wires, the outsides of the positive electrode column 4 and the negative electrode column 5 are both covered with insulating sheaths, which are fixedly mounted on the upper surface of the upper sealing end cover 3.

[0035] Working principle: Those skilled in the art can use the lithium battery cell of the present invention through conventional methods. The present invention is provided with an anti-corrosion cavity 8, which increases the area of ​​the electrolyte corrosion reaction, thereby increasing the time for the complete reaction of the corrosion reaction and reducing the efficiency of the corrosion reaction. The anti-corrosion cavity 8 is filled with an inert gas, which effectively hinders the corrosion reaction, thereby effectively achieving the anti-corrosion effect of the present invention, avoiding corrosion and damage of the lithium battery cell, and improving the overall service life and safety of the lithium battery cell. In addition, due to the presence of the anti-corrosion cavity 8, when the electrolyte leaks, the distance the liquid flows becomes longer, reducing the risk of leakage, and having the use characteristics of internal corrosion protection.

[0036] Among them, the utility model is coated with an anti-corrosion coating on the outside of the lithium battery shell 1. The external anti-corrosion coating can effectively protect the outside of the lithium battery from corrosion. By cooperating with the use of the anti-corrosion cavity 8, the utility model has the characteristics of dual internal and external corrosion protection, greatly reducing corrosion, improving the use effect and overall service life;

[0037] At the same time, the inner buffer layer 9 can be provided so that when the lithium battery shell 1 is subjected to an external impact, the soft rubber particles 10 inside it can buffer the external impact force to a certain extent, and have a good force buffering effect, thereby effectively protecting the internal lithium battery body 101 from damage by the impact, improving the protection performance, and the inner buffer layer 9 and the anti-corrosion cavity 8 can provide a buffer cavity for the deformation caused by the impact, thereby preventing the deformation effect from directly acting on the lithium battery body 101, better protecting the lithium battery body 101 from the outside, and reducing economic losses;

[0038] The explosion-proof outer shell 2 provided can effectively improve the structural strength of the lithium battery cell shell 1, and the wrapped explosion-proof shell design can effectively provide all-round explosion-proof protection for the internal lithium battery cell, has a certain explosion-proof effect, can effectively avoid the splashing of fragments caused by short-circuit explosion, and better provide explosion-proof protection to the outside world. At the same time, the heat dissipation groove 7 provided can dissipate the internal heat in time, has a certain heat dissipation effect, and improves the overall performance of the shell.

[0039] To sum up, through the coordinated use of the above-mentioned structure, the lithium battery cell of the present invention has good corrosion resistance and explosion-proof properties, high safety in use, effectively reduces the safety hazards caused by corrosion and explosion, has a long service life, and has a simple overall structure and low manufacturing cost, making it suitable for promotion and use.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A corrosion-resistant lithium battery cell, comprising a lithium battery cell housing (1), characterized in that: The exterior of the lithium battery cell shell (1) is coated with an anti-corrosion coating, a lithium battery cell (101) is provided inside the lithium battery cell shell (1), an anti-corrosion cavity (8) is wrapped around the exterior of the lithium battery cell (101), the interior of the anti-corrosion cavity (8) is a hollow structure, an inner buffer layer (9) is wrapped around the exterior of the anti-corrosion cavity (8), the interior of the anti-corrosion cavity (8) is filled with an inert gas, the interior of the inner buffer layer (9) is filled with a plurality of soft rubber particles (10), the soft rubber particles (10) are hollow spherical rubber particles, the exterior of the lithium battery cell shell (1) is wrapped with an explosion-proof outer shell (2), and a plurality of heat dissipation grooves (7) distributed linearly at equal intervals are provided on the outer walls of the explosion-proof outer shell (2).

2. The corrosion-resistant lithium battery cell according to claim 1, characterized in that: An upper sealing end cover (3) is fixedly mounted on the upper surface of the lithium battery cell housing (1), and an information marking area (6) is provided in the middle of the upper surface of the upper sealing end cover (3).

3. The corrosion-resistant lithium battery cell according to claim 2, characterized in that: The information identification area (6) is a square identification frame.

4. The corrosion-resistant lithium battery cell according to claim 1, characterized in that: One side of the upper surface of the lithium battery core (101) is electrically connected to a positive electrode post (4), and the other side of the upper surface of the lithium battery core (101) is electrically connected to a negative electrode post (5).

5. The corrosion-resistant lithium battery cell according to claim 4, characterized in that: The top ends of the positive pole (4) and the negative pole (5) are both arranged to pass through the upper sealing end cover (3).

6. The corrosion-resistant lithium battery cell according to claim 4, characterized in that: The outsides of the positive pole (4) and the negative pole (5) are both covered with insulating sheaths, and the insulating sheaths are fixedly mounted on the upper surface of the upper sealing end cover (3).

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