Cylindrical lithium-ion battery

Abstract

The utility model relates to the technical field of lithium-ion batteries, and discloses a cylindrical lithium-ion battery, which comprises a battery main body, an upper cover, a lower cover, a sealing block and a plug column, the upper cover and the lower cover are respectively arranged at the upper end and the lower end of the battery main body, and the surface of the upper cover is provided with an accommodating groove for accommodating the sealing block. An air outlet communicated with the containing groove is formed in the upper cover, an outer sealing ring is fixedly installed at the bottom of the sealing block, a first groove is formed in the position, corresponding to the outer sealing ring, of the upper cover, the outer sealing ring is inserted into the first groove in a matched mode, and an inner sealing ring is fixedly installed at the position, located on the inner side of the outer sealing ring, of the bottom of the sealing block; a plurality of exhaust ports are formed in the side part of the inner sealing ring at intervals, and a second groove is formed in the position, corresponding to the inner sealing ring, of the upper cover, so that a multi-layer sealing structure can be formed, the sealing effect on the air outlet holes is effectively improved, and water impurities are prevented from easily permeating into the battery main body to cause damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium electronic battery technical field more specifically, the utility model relates to a cylindrical lithium electronic battery. BACKGROUND

[0002] Lithium ion battery is a kind of secondary battery, that is, rechargeable battery, it uses lithium ion as charge carrier to move between positive and negative to work, when charging, lithium ion is deintercalated from positive and is inserted into negative through electrolyte, so that negative electrode reaches rich lithium state, when discharging, it is contrary, cylindrical lithium electronic battery is one of the representatives of modern high-performance battery because of its wide application.

[0003] Through the search, a kind of cylindrical lithium battery is disclosed in Chinese patent authorized publication No. CN 217507603 U, although sealing block is arranged on the upper surface of upper cover, and sealing block is movably covered outside air outlet, when internal pressure of lithium battery is too large, sealing block can be pushed to upper side, so that internal gas is discharged from air outlet, explosion phenomenon caused by internal pressure being too large can be prevented, however, since single-layer sealing structure is formed by only using sealing block to contact the surface of upper cover, the sealing effect of air outlet is poor, water impurities are easily infiltrated into shell and cause damage, affect the service life of battery, based on this, the utility model designs a cylindrical lithium electronic battery, so as to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a cylindrical lithium electronic battery to solve the problems in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A cylindrical lithium electronic battery, including battery main body, upper cover, lower cover, sealing block and plug column, the upper cover and lower cover are respectively arranged at the upper and lower ends of battery main body, the surface of upper cover is provided with containing groove for containing sealing block, the upper cover is provided with air outlet that is communicated with containing groove, the bottom of sealing block is fixedly installed with outer sealing ring, the first recess is set up at the position corresponding to outer sealing ring on the upper cover, the outer sealing ring is matched and is inserted in the first recess, the bottom of sealing block is fixedly installed with inner sealing ring on the inner side of outer sealing ring, the side of inner sealing ring is spaced apart and is provided with a plurality of exhaust ports, the second recess is set up at the position corresponding to inner sealing ring on the upper cover, the inner sealing ring is slidably connected with the second recess, spring is fixedly connected between inner sealing ring and upper cover, plug column is fixedly installed in the middle of the bottom of sealing block, plug column is matched with air outlet.

[0007] As the preferred technical scheme of the utility model, the positive pole is arranged through the upper cover, and the negative pole is arranged through the lower cover.

[0008] As the preferred technical scheme of the utility model, the cross section shape of the sealing block is circular, and the upper end surface of the sealing block is flush with the upper end surface of the upper cover.

[0009] As the preferred technical scheme of the utility model, the number of the exhaust ports is four, and the four exhaust ports are arranged in a ring shape and equidistantly spaced.

[0010] As the preferred technical scheme of the utility model, the number of the springs is two, and the two springs are arranged in a symmetrical manner.

[0011] As the preferred technical scheme of the utility model, the bottom of the plug column is provided with a gas collecting groove, and the cross section shape of the gas collecting groove is arc-shaped.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] 1、The utility model discloses a sealing structure of cylindrical lithium electronic battery, which comprises an upper cover, a battery main body, a sealing block, a plug column, an outer sealing ring, a first groove, an inner sealing ring, a second groove and a spring.

[0014] 2、The utility model discloses a sealing structure of cylindrical lithium electronic battery, which comprises an upper cover, a battery main body, a sealing block, a plug column, an outer sealing ring, a first groove, an inner sealing ring, a second groove and a spring.

[0015] 3、The utility model discloses a sealing structure of cylindrical lithium electronic battery, which comprises an upper cover, a battery main body, a sealing block, a plug column, an outer sealing ring, a first groove, an inner sealing ring, a second groove and a spring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model of cylindrical lithium electronic battery;

[0017] Figure 2 It is a sectional structure schematic view of the utility model of cylindrical lithium electronic battery;

[0018] Figure 3 It is Figure 2 It is an enlarged structure schematic view of part A;

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the sealing block in the cylindrical lithium electronic battery.

[0020] In the figure: 1, battery main body; 2, upper cover; 201, positive electrode; 3, lower cover; 301, negative electrode; 4, containing groove; 5, sealing block; 501, outer sealing ring; 502, inner sealing ring; 503, exhaust port; 504, plug column; 505, gas collecting groove; 6, gas outlet hole; 7, first groove; 8, second groove; 801, spring. Specific embodiments

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] As Figures 1 to 4 shown, the utility model provides a cylindrical lithium electronic battery, including battery main body 1, upper cover 2, lower cover 3, sealing block 5 and plug column 504, upper cover 2 and lower cover 3 are arranged at the upper and lower ends of battery main body 1 respectively, the surface of upper cover 2 is provided with containing groove 4 for containing sealing block 5, upper cover 2 is provided with gas outlet hole 6 that communicates with containing groove 4, the bottom of sealing block 5 is fixedly installed with outer sealing ring 501, the first groove 7 that corresponds with outer sealing ring 501 is set up on upper cover 2, outer sealing ring 501 is inserted in first groove 7, the bottom of sealing block 5 is fixedly installed with inner sealing ring 502 on the inner side of outer sealing ring 501, a plurality of exhaust ports 503 are spaced apart and arranged on the side of inner sealing ring 502, the second groove 8 that corresponds with inner sealing ring 502 is set up on upper cover 2, inner sealing ring 502 and second groove 8 are connected slidingly, spring 801 is fixedly connected between inner sealing ring 502 and upper cover 2, plug column 504 is fixedly installed in the middle of the bottom of sealing block 5, plug column 504 is adapted to gas outlet hole 6, so that plug column 504 can be embedded in gas outlet hole 6 for plugging.

[0023] As Figure 1 shown, the positive electrode 201 is arranged through upper cover 2, and the negative electrode 301 is arranged through lower cover 3.

[0024] As Figure 1 and Figure 3 shown, the cross-sectional shape of the sealing block 5 is circular, the upper end surface of the sealing block 5 is flush with the upper end surface of the upper cover 2, so that the sealing block 5 can be embedded in the containing groove 4, and the sealing block 5 is effectively hidden, achieving the purpose of ensuring the overall appearance of the cylindrical lithium electronic battery.

[0025] AsFigure 3 and Figure 4 As shown, there are four exhaust ports 503, which are arranged in a ring at equal intervals.

[0026] Among them, such as Figure 3 As shown, there are two springs 801, which are arranged symmetrically.

[0027] Among them, such as Figure 3 As shown, a gas collecting groove 505 is provided at the bottom of the plunger 504. The cross-sectional shape of the gas collecting groove 505 is arc-shaped. If the internal gas pressure of the battery body 1 is too high, the gas can rush into the gas collecting groove 505, thereby forming a gas action part.

[0028] The working principle of this utility model:

[0029] During use, by inserting the outer sealing ring 501 into the first groove 7, sliding the inner sealing ring 502 into the second groove 8, connecting the spring 801 between the inner sealing ring 502 and the top cover 2, and sealing the vent 6 with the plug 504, a multi-layer sealing structure is formed, which effectively improves the sealing effect of the vent and prevents water and impurities from easily seeping into the battery body 1 and causing damage. If the internal air pressure of the battery body 1 is too high, the gas flows rapidly through the vent 6, pushing the sealing block 5 and the plug 504 upward, stretching the spring 801, disengaging the outer sealing ring 501 from the first groove 7, and sliding the inner sealing ring 502 upward along the second groove 8. The gas can be discharged by the exposed part of the vent 503 on the inner sealing ring 502, thus preventing the battery body 1 from exploding due to excessive internal pressure.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cylindrical lithium electrochemical cell characterized by: The battery includes a battery body (1), an upper cover (2), a lower cover (3), a sealing block (5) and a plug column (504). The upper cover (2) and the lower cover (3) are arranged at the upper and lower ends of the battery body (1) respectively, the surface of the upper cover (2) is provided with a containing groove (4) for containing the sealing block (5), the upper cover (2) is provided with a gas outlet hole (6) communicated with the containing groove (4), the bottom of the sealing block (5) is fixedly provided with an outer sealing ring (501), the upper cover (2) is provided with a first groove (7) corresponding to the outer sealing ring (501), and the outer sealing ring (501) is inserted into the first groove (7). The bottom of the sealing block (5) is fixedly provided with an inner sealing ring (502) on the inner side of the outer sealing ring (501), the side of the inner sealing ring (502) is provided with a plurality of exhaust ports (503) at intervals, the upper cover (2) is provided with a second groove (8) corresponding to the inner sealing ring (502), the inner sealing ring (502) is slidably connected with the second groove (8), springs (801) are fixedly connected between the inner sealing ring (502) and the upper cover (2), and the plug column (504) is fixedly arranged at the middle of the bottom of the sealing block (5).

2. A cylindrical lithium electrochemical cell according to claim 1, wherein: The upper cover (2) is provided with a positive electrode (201) penetrating through, and the lower cover (3) is provided with a negative electrode (301) penetrating through.

3. A cylindrical lithium electrochemical cell according to claim 1, wherein: The cross-sectional shape of the sealing block (5) is circular, and the upper end surface of the sealing block (5) is flush with the upper end surface of the upper cover (2).

4. A cylindrical lithium electrochemical cell according to claim 1, wherein: The number of the exhaust ports (503) is four, and the four exhaust ports (503) are arranged in a ring shape at equal intervals.

5. A cylindrical lithium electrochemical cell according to claim 1, wherein: The number of the springs (801) is two, and the two springs (801) are arranged in a symmetrical manner.

6. A cylindrical lithium electrochemical cell according to claim 1, wherein: The bottom of the plug column (504) is provided with a gas collecting groove (505), and the cross-sectional shape of the gas collecting groove (505) is arc-shaped.

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