阅读说明：本技术 一种锂电池封口板用注液孔防护结构 (Lithium cell seals board with annotating liquid hole protective structure ) 是由 郭道传 王必宁 于 2020-10-13 设计创作，主要内容包括：本发明涉及锂电池技术领域,且公开了一种锂电池封口板用注液孔防护结构,包括上盖本体,所述上盖本体的内部设置有防爆阀,所述上盖本体的内部设置有正极结构,所述上盖本体的内部设置有负极结构,所述上盖本体的内部设置有防护装置,所述防爆阀包括防爆孔,所述防爆孔的外壁固定连接有弹性体防护片,所述上盖本体的内部开设有防爆孔,所述上盖本体的外壁接触有弹性体防护片。该锂电池封口板用注液孔防护结构,通过上盖本体的设置,结构简单,正极连接片和负极连接片分别水平延伸至上盖本体长度方向的两侧边,增加了锂电池的电极性能,同时具有较好的防爆性能,安全性高,能够完全避免锂电池过充时的爆炸现象。(The invention relates to the technical field of lithium batteries, and discloses a liquid injection hole protection structure for a lithium battery sealing plate, which comprises an upper cover body, wherein an explosion-proof valve is arranged inside the upper cover body, a positive electrode structure is arranged inside the upper cover body, a negative electrode structure is arranged inside the upper cover body, a protection device is arranged inside the upper cover body, the explosion-proof valve comprises an explosion-proof hole, an elastic body protection sheet is fixedly connected to the outer wall of the explosion-proof hole, the explosion-proof hole is formed inside the upper cover body, and the outer wall of the upper cover body is in contact with the elastic body protection sheet. This lithium cell sealing plate is with annotating liquid hole protective structure, through the setting of upper cover body, simple structure, positive pole connection piece and negative pole connection piece level respectively extend to the both sides limit of upper cover body length direction, have increased the electrode performance of lithium cell, have better explosion-proof ability simultaneously, and the security is high, the explosion phenomenon when can avoiding the lithium cell to overcharge completely.)

1. The utility model provides a lithium cell sealing plate is with annotating liquid hole protective structure, includes upper cover body (1), its characterized in that: the anti-explosion valve (2) is arranged inside the upper cover body (1), the positive electrode structure (3) is arranged inside the upper cover body (1), the negative electrode structure (4) is arranged inside the upper cover body (1), and the protection device (5) is arranged inside the upper cover body (1).

2. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: explosion-proof valve (2) are including explosion-proof hole (201), the outer wall fixedly connected with elastomer protection piece (202) in explosion-proof hole (201), explosion-proof hole (201) have been seted up to the inside of upper cover body (1), the outer wall contact of upper cover body (1) has elastomer protection piece (202).

3. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: the positive pole structure (3) comprises a positive pole seat (301), a first plastic washer (302) is fixedly connected to the outer wall of the positive pole seat (301), a first aluminum rivet (303) is connected to the inner thread of the positive pole seat (301), a positive pole column (304) is fixedly connected to the inner portion of the positive pole seat (301), and a positive connecting sheet (305) is fixedly connected to the inner portion of the positive pole seat (301).

4. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: the negative pole structure (4) comprises a negative pole seat (401), the outer wall of the negative pole seat (401) is fixedly connected with a second plastic washer (402), the inner thread of the negative pole seat (401) is connected with a second aluminum rivet (403), the inner portion of the negative pole seat (401) is fixedly connected with a negative pole post (404), and the inner portion of the negative pole seat (401) is fixedly connected with a negative pole connecting piece (405).

5. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: protector (5) are including seal cover (501), the inside swing joint of seal cover (501) has rubber buffer (502).

6. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: the top outer wall swing joint of seal cover (501) has notes liquid hole body (503), the outer wall fixedly connected with annular separation blade (504) of seal cover (501).

7. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: the upper cover body (1) is internally provided with a liquid injection hole body (503), and the size of the positive electrode seat (301) is the same as that of the negative electrode seat (401).

8. The lithium battery sealing plate liquid injection hole protection structure as claimed in claim 1, wherein: the number of the first aluminum nails (303) is four, the size of each first aluminum nail (303) is the same, and the size of each first aluminum nail (303) is the same as that of each second aluminum nail (403).

Technical Field

The invention relates to the technical field of lithium batteries, in particular to a liquid injection hole protection structure for a lithium battery sealing plate.

Background

With the obvious problem of energy consumption, the lithium ion battery is applied to the power fields of mobile equipment, portable communication equipment, automobiles, rail transit, electric bicycles and the like due to the characteristic of environmental protection, and has a huge development prospect.

The traditional battery upper cover is provided with a liquid injection hole, the liquid injection hole is not sealed after liquid injection is completed in a drying room, then charge and discharge in an open state are carried out in the drying room, and after gas generated by reaction is discharged, sealing of the liquid injection hole is carried out. In the process, the battery is always in a state that the interior of the battery is communicated with the external environment, and the water content of the drying room is controlled within 1 percent at the lowest, so that the quality of the lithium ion battery such as the service life is seriously influenced, and meanwhile, a large amount of energy is consumed by dehumidification of the drying room, so that the battery is not beneficial to being widely applied in production.

The lithium cell has the voltage height, longe-lived, energy density is high, advantages such as light, its application is also constantly expanding, but its security is inferior than other secondary battery, when power lithium cell overcharged, materials such as its inside electrolyte can the schizolysis produce gas for battery case bloatees and breaks, lets oxygen enter and pile up the lithium ion reaction on the negative pole surface, and then explodes, consequently, we have provided a lithium cell sealing plate and have solved above-mentioned problem with annotating liquid hole protective structure.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the liquid injection hole protection structure for the lithium battery sealing plate, which has the advantages of convenience in protecting the liquid injection hole, better explosion-proof performance and the like, and solves the problems that the liquid injection hole has no protection function and is poor in explosion-proof performance.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a lithium cell sealing plate is with annotating liquid hole protective structure, includes the upper cover body, the inside of upper cover body is provided with the explosion-proof valve, the inside of upper cover body is provided with anodal structure, the inside of upper cover body is provided with negative pole structure, the inside of upper cover body is provided with protector.

Further, the explosion-proof valve includes the explosion-proof hole, the outer wall fixedly connected with elastomer protection piece in explosion-proof hole, the explosion-proof hole has been seted up to the inside of upper cover body, the outer wall contact elastomer protection piece of upper cover body.

Further, the positive pole structure includes the anodal seat, the outer wall fixedly connected with first plastic packing ring of anodal seat, the inside threaded connection of anodal seat has first aluminium willow nail, the inside fixedly connected with anodal utmost point post of anodal seat, the inside fixedly connected with anodal connection piece of anodal seat.

Further, the negative pole structure includes the negative pole seat, the outer wall fixedly connected with second plastic packing ring of negative pole seat, the inside threaded connection of negative pole seat has the second aluminium willow nail, the inside fixedly connected with negative pole utmost point post of negative pole seat, the inside fixedly connected with negative pole connection piece of negative pole seat.

Further, protector includes the seal cover, the inside swing joint of seal cover has the rubber buffer, the top outer wall swing joint of seal cover has notes liquid hole body, the outer wall fixedly connected with annular separation blade of seal cover.

Furthermore, a liquid injection hole body is arranged in the upper cover body, the size of the positive electrode seat is the same as that of the negative electrode seat, the number of the first aluminum nails is four, each first aluminum nail is the same in size, and the size of each first aluminum nail is the same as that of each second aluminum nail.

The invention has the beneficial effects that:

1. this lithium cell sealing plate is with annotating liquid hole protective structure, through the setting of upper cover body, simple structure, positive pole connection piece and negative pole connection piece level respectively extend to the both sides limit of upper cover body length direction, have increased the electrode performance of lithium cell, have better explosion-proof ability simultaneously, and the security is high, the explosion phenomenon when can avoiding the lithium cell to overcharge completely.

2. This lithium cell seals board with annotating liquid hole protective structure, through being equipped with annotate the anastomotic soft rubber buffer in liquid hole body aperture, be equipped with the seal cover in the rubber buffer outside simultaneously, and set up annular retaining piece on the seal cover, it is difficult for droing to annotate the liquid in-process, make and annotate the liquid process and keep apart with ambient atmosphere completely, moisture in the environment can not take place the contact with electrolyte, no matter be the ambient humidity size annotate liquid with electrolyte and can not contact, can not produce the problem of electrolyte absorption moisture, it compares with current drying room notes liquid process and not only can overcome lithium cell production and annotate electrolyte technology absorption moisture problem, can also save because of satisfying the dehumidification of drying chamber and consume a large amount of energy, be favorable to using widely in production, have great production practice meaning.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a top view of the structure of the present invention;

FIG. 2 is a bottom view of FIG. 1 of the present invention;

fig. 3 is a schematic view of the protection device of the present invention.

Description of reference numerals: 1. an upper cover body; 2. an explosion-proof valve; 201. an explosion-proof hole; 202. an elastomer protective sheet; 3. a positive electrode structure; 301. a positive electrode holder; 302. a first plastic gasket; 303. a first aluminum spike; 304. a positive pole column; 305. a positive electrode connecting sheet; 4. a negative electrode structure; 401. a negative pole seat; 402. a second plastic washer; 403. a second aluminum spike; 404. a negative electrode post; 405. a negative electrode connecting sheet; 5. a guard; 501. sealing sleeves; 502. a rubber plug; 503. a liquid injection hole body; 504. an annular baffle plate.

Detailed Description

The technical solution in 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.

Referring to fig. 1-3, a protection structure for a liquid injection hole of a sealing plate of a lithium battery includes an upper cover body 1, an explosion-proof valve 2 is disposed inside the upper cover body 1, a positive electrode structure 3 is disposed inside the upper cover body 1, a negative electrode structure 4 is disposed inside the upper cover body 1, and a protection device 5 is disposed inside the upper cover body 1.

Explosion-proof valve 2 includes explosion-proof hole 201, and explosion-proof hole 201's outer wall fixedly connected with elastomer protection piece 202 has seted up explosion-proof hole 201 in the inside of upper cover body 1, and the outer wall contact of upper cover body 1 has elastomer protection piece 202.

Anodal structure 3 includes anodal seat 301, the first plastic packing ring 302 of the outer wall fixedly connected with of anodal seat 301, the inside threaded connection of anodal seat 301 has first aluminium willow nail 303, anodal seat 301's the anodal utmost point post of inside fixedly connected with 304, anodal seat 301's the anodal connection piece 305 of inside fixedly connected with, setting through upper cover body 1, moreover, the steam generator is simple in structure, anodal connection piece 305 and negative pole connection piece 405 level respectively extend to the both sides limit of 1 length direction of upper cover body, the electrode performance of lithium cell has been increased, better explosion-proof performance has simultaneously, the security is high, can avoid the explosion phenomenon when the lithium cell overcharges completely.

Negative pole structure 4 includes negative pole seat 401, and negative pole seat 401's outer wall fixedly connected with second plastic packing ring 402, and negative pole seat 401's inside threaded connection has second aluminium willow nail 403, negative pole seat 401's inside fixedly connected with negative pole post 404, negative pole seat 401's inside fixedly connected with negative pole connection piece 405.

The protection device 5 comprises a sealing sleeve 501, a rubber plug 502 is movably connected inside the sealing sleeve 501, a liquid injection hole body 503 is movably connected on the outer wall of the top of the sealing sleeve 501, an annular baffle piece 504 is fixedly connected on the outer wall of the sealing sleeve 501, a soft rubber plug 502 matched with the aperture of the liquid injection hole body 503 is arranged, the sealing sleeve 501 is arranged outside the rubber plug 502, the annular baffle piece 504 is arranged on the sealing sleeve 501, the liquid injection process is not easy to fall off in the liquid injection process, the liquid injection process is completely isolated from the environment atmosphere, the moisture in the environment can not contact with the electrolyte, no matter the environment humidity is not in contact with the electrolyte injection, the problem that the electrolyte absorbs the moisture can not be generated, compared with the existing liquid injection process of a drying room, the problem that the electrolyte is absorbed by the electrolyte injection process in lithium battery production can, is beneficial to being widely applied in production and has great production practice significance.

The upper cover body 1 is internally provided with a liquid injection hole body 503, the size of the positive electrode holder 301 is the same as that of the negative electrode holder 401, the number of the first aluminum nails 303 is four, each first aluminum nail 303 is the same in size, and the size of the first aluminum nail 303 is the same as that of the second aluminum nail 403.

When in use, through the arrangement of the upper cover body 1, the structure is simple, the positive connecting piece 305 and the negative connecting piece 405 respectively and horizontally extend to two side edges of the length direction of the upper cover body 1, the electrode performance of the lithium battery is increased, and the lithium battery has better explosion-proof performance and high safety, and can completely avoid the explosion phenomenon when the lithium battery is overcharged, through arranging the soft rubber plug 502 which is matched with the aperture of the liquid injection hole body 503, and simultaneously arranging the sealing sleeve 501 outside the rubber plug 502, and arranging the annular retaining sheet 504 on the sealing sleeve 501, the liquid injection process is not easy to fall off, so that the liquid injection process is completely isolated from the environment atmosphere, the moisture in the environment can not contact with the electrolyte, no matter the environment humidity is not in contact with the electrolyte injection process, the problem that the electrolyte absorbs the moisture can not be generated, compared with the liquid injection process of the existing drying room, the problem that the, and a large amount of energy consumed by meeting the dehumidification requirement of the drying room can be saved, the method is favorable for being widely applied in production, and has great production practice significance.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.