CN211555974U

CN211555974U - Battery assembly

Info

Publication number: CN211555974U
Application number: CN201922501843.0U
Authority: CN
Inventors: 周华
Original assignee: Jiangsu Jingjujing Environmental Protection Technology Co ltd
Current assignee: Jiangsu Jingjujing Environmental Protection Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-22
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a battery pack, including top cap, bottom, battery case, interior casing, explosion-proof equipment, wherein: be provided with the sealing washer just on the through-hole correspond the through-hole position on the top cap and be provided with explosion-proof valve, the circumference array is provided with the venthole that runs through the valve body just on the explosion-proof valve outer wall corresponds venthole department and is provided with the check valve, the explosion-proof valve is cavity structure just the inside cavity department of explosion-proof valve is provided with the sealing rubber ball, the setting of sealing rubber ball cover through-hole just the setting of explosion-proof valve inner wall top is leaned on the sealing rubber ball surface top, the utility model discloses can prevent the inside electrolyte leakage polluted environment of battery case when to battery pressure release, explosion-proof.

Description

Battery assembly

Technical Field

The utility model belongs to the technical field of the battery preparation, concretely relates to battery pack.

Background

With the rapid development of electronic products, aluminum-case batteries are widely used in the field of large-scale electric devices such as mobile communication devices, portable electronic device electric tools, electric bicycles, electric automobiles, etc., however, because most of the aluminum-case batteries are high-capacity batteries, safety concerns that have been paid extensive attention to are still restricting further development.

However, once the case body is broken by external force such as collision or impact, the inside of the aluminum-case battery is short-circuited between the positive electrode and the negative electrode, which causes irreversible change in the structure of the positive electrode active material and decomposition of the electrolyte, and generates a large amount of gas.

Present battery structure all can additionally set up the explosion-proof piece in inside, when the value reaches the critical value in the battery structure, the explosion-proof piece in the twinkling of an eye with outside intercommunication, realize quick exhaust, reduce the value of pressing in the battery structure, powerful pressure in the quick release battery structure cavity avoids the explosion or reduces the explosion harm, though the explosion-proof piece can avoid the battery structure to press too big, but can make the inside electrolyte of battery leak out, the polluted environment, harm sanitation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery pack to solve foretell technical problem.

In order to achieve the above object, the utility model provides a following technical scheme: a battery assembly, includes top cap, bottom, battery case, explosion-proof valve, check valve, wherein:

a top cover is fixedly arranged at the top of the battery shell, and a bottom cover is fixedly arranged at the bottom of the battery shell;

the battery shell, the top cover and the bottom cover are encircled to form a closed hollow cavity structure;

through holes penetrating through the top cover are symmetrically arranged on the top cover from left to right, and the through holes are designed in a circular structure;

the top cover is provided with a positive electrode electrically connected with the positive electrode of the battery and a negative electrode electrically connected with the negative electrode of the battery;

a sealing ring is arranged on the through hole, and an explosion-proof valve is arranged on the top cover corresponding to the through hole;

the upper circumference of the explosion-proof valve is provided with air outlet holes penetrating through the valve body in an array manner, and the outer wall of the explosion-proof valve is provided with check valves corresponding to the air outlet holes;

the explosion-proof valve is of a hollow cavity structure, a sealing rubber ball is arranged at the position of a cavity inside the explosion-proof valve, the sealing rubber ball covers the through hole, and the outer surface of the sealing rubber ball is arranged against the top end of the inner wall of the explosion-proof valve.

Preferably, the cross section of the explosion-proof valve is in an isosceles trapezoid structure and is arranged at an included angle of 45 degrees.

Preferably, the check valve comprises an exhaust cylinder, an air hole, a connecting plate, a self-cover plate and a hinge column, the exhaust cylinder is provided with the air hole, the air hole and the air outlet are correspondingly arranged, the self-cover plate is movably arranged on the exhaust cylinder through the hinge column, and the self-cover plate can rotate relative to the exhaust cylinder through the hinge column.

Preferably, the connecting plate is fixedly connected with the outer wall of the explosion-proof valve, and the self-cover plate is arranged at the air outlet end of the exhaust funnel at an included angle of 17 degrees.

Preferably, the battery shell is made of stainless steel materials, and a nickel plating layer is arranged on the inner wall of the battery shell.

Preferably, the sealing ring is made of polypropylene material, and the polypropylene material can be softened and/or partially melted at the high temperature of 85-100 ℃.

Preferably, the sealing rubber ball is elastically deformable under an external pressure and is made of a corrosion-resistant material.

The utility model discloses a technological effect and advantage: the battery pack is characterized in that:

1. the electrolyte leakage in the battery shell can be prevented from polluting the environment while the battery is decompressed and explosion-proof.

2. The sealing performance of the battery shell can be improved by the arrangement of the sealing ring and the sealing rubber ball, the sealing ring is prevented from being impacted by external force or being deformed or damaged by the influence of external environment, and dust and rainwater can be prevented from falling and being accumulated to the through hole by the arrangement of the check valve, so that the air leakage efficiency of the battery is influenced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the present invention during pressure relief;

FIG. 3 is an exploded view of the present invention;

fig. 4 is a sectional view of the present invention.

In the figure: 1-top cover, 2-bottom cover, 3-battery shell, 4-explosion-proof valve, 5-air outlet, 6-check valve, 7-sealing ring;

11-a through hole;

41-sealing rubber ball;

61-an exhaust pipe, 62-an air hole, 63-a connecting plate, 64-a self-cover plate and 65-a hinge column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1-4 of the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a battery pack as shown in 1-4 in the picture, including top cap 1, bottom 2, battery housing 3, explosion-proof valve 4, venthole 5, check valve 6, wherein:

the top of the battery shell 3 is fixedly provided with a top cover 1, the bottom of the battery shell 3 is fixedly provided with a bottom cover 2, and the top cover 1 is always placed upwards when the battery is placed.

The battery shell 3, the top cover 1 and the bottom cover 2 are enclosed to form a closed hollow cavity structure, and the battery shell 3, the top cover 1 and the bottom cover 2 can be fixedly connected in a welding mode.

Bilateral symmetry is provided with the through-hole 11 that runs through top cap 1 just on top cap 1 through-hole 11 is circular structural design, and circular structural design's through-hole 11 can with the mutual block of sealing rubber ball 41, and sealing rubber ball 41 can make through-hole 11 be in the off-state, just sealing rubber ball 41 can prevent that sealing washer 7 from receiving external environment to influence to take place deformation or damage.

The top cover 1 is provided with a positive electrode 12 electrically connected with a battery positive electrode and a negative electrode 13 electrically connected with a battery negative electrode, wherein the battery positive electrode is connected with the positive electrode 12 through a lead, and the battery negative electrode is connected with the negative electrode 13 through a lead.

The through hole 11 is provided with the sealing ring 7, the sealing ring 7 is made of polypropylene material, the polypropylene material can be softened and/or partially dissolved at the high temperature of 85-100 ℃, when the battery is in short circuit, the internal temperature of the battery shell 3 rises, when the internal temperature of the battery shell 3 reaches more than 85 ℃, the sealing ring 7 can be softened and/or partially dissolved, the sealing state of the battery shell 3 is destroyed, the gas in the battery can be discharged out of the battery shell 3 from the through hole 11 under the action of pressure, and the explosion caused by the expansion of the battery can be effectively prevented.

The top cover 1 is provided with an explosion-proof valve 4 corresponding to the through hole 11, and the explosion-proof valve 4 can discharge the gas discharged out of the battery shell 3 quickly to prevent the battery shell 3 from expanding to explode.

The circumference array is provided with venthole 5 just that runs through the valve body on the explosion-proof valve 4 the corresponding venthole 5 department of explosion-proof valve 4 outer wall is provided with check valve 6, and check valve 6 can prevent that dust and rainwater from dropping to through-hole 11 under the battery normal conditions, influences the efficiency that the battery loses heart.

Explosion-proof valve 4 is the cavity structure just explosion-proof valve 4 inside cavity department is provided with sealing rubber ball 41, sealing rubber ball 41 covers through-hole 11 and sets up just sealing rubber ball 41 surface top is leaned on explosion-proof valve 4 inner wall top to set up, sealing rubber ball 41 surface can support and hold sealing washer 7 up end and set up in explosion-proof valve 4's inside cavity department.

Elastic deformation just can take place for sealing rubber ball 41 under external pressure sealing rubber ball 41 is made by corrosion resistant material and is regarded as the battery short circuit, the inside a large amount of gases that produces of battery case 3, the inside pressure of battery case 3 is increased in the production of a large amount of gases, because sealing rubber ball 41 has elasticity, the event is when the pressure increases in battery case 3, make sealing rubber ball 41 that covers through-hole 11 receive ascending pressure, compressive deformation, through-hole 11 is opened, the inside gas of battery case 3 is followed through-hole 11 and is let out, the purpose of pressure release has been reached, can effectually prevent the battery explosion.

Specifically, explosion-proof valve 4 is transversal personally submits isosceles trapezoid structure setting and isosceles trapezoid is 45 contained angles and sets up, can make the dust landing naturally, prevents that the dust from piling up in explosion-proof valve 4, influences pressure release efficiency.

Specifically, the check valve 6 includes an exhaust funnel 61, an air hole 62, a connecting plate 63, a self-cover plate 64 and a hinge post 65, the exhaust funnel 61 is provided with an air hole 62, the air hole 62 and the air outlet 5 are arranged correspondingly, the self-cover plate 64 is movably arranged on the exhaust funnel 61 through the hinge post 65, the self-cover plate 64 can rotate relative to the exhaust funnel 61 through the hinge post 65, the connecting plate 63 is fixedly connected with the outer wall of the explosion-proof valve 4, and the self-cover plate 64 is arranged at the air outlet end of the exhaust funnel 61 at an included angle of 17 degrees, when the internal pressure of the battery is increased, the self-cover plate 64 covering the air hole 62 is subjected to pressure from inside to outside, the self-cover plate 64 can be blown open, the air is discharged from the air hole 62, the internal pressure of the battery is reduced, the self-cover plate 64 can cover the air hole 62 under the action of gravity, the purpose of pressure relief is achieved, and, and the self-cover plate 64 can automatically descend when not needed, so that dust is prevented from entering the explosion-proof valve 4 through the air hole 62, and the pressure relief efficiency is prevented from being influenced.

Specifically, battery case 3 adopts stainless steel material just the 3 inner walls of battery case are provided with the nickel coating, can effectively prevent that 3 inner walls of battery case from being corroded by the inside electrolyte of battery.

The working principle is as follows: the battery pack is characterized in that:

when the battery is normally used, the battery shell 3 is in a sealing state through the arrangement of the sealing ring 7 and the sealing rubber ball 41, the sealing performance of the battery shell 3 can be improved through the arrangement of the sealing rubber ball 41, the sealing ring 7 is prevented from being deformed or damaged due to external force impact or external environment influence, and the arrangement of the check valve 5 can effectively prevent dust and rainwater from falling and being accumulated in the through hole 11 to influence the air leakage efficiency of the battery.

If the positive electrode and the negative electrode of the battery are in direct contact due to the damage of a battery diaphragm, the damage of a pole piece or external collision, and an internal short circuit occurs, irreversible change of a positive electrode active material structure and decomposition of electrolyte are caused, a large amount of gas is generated, the temperature of the battery is increased and the internal pressure of the battery is increased, when the internal temperature of the battery shell 3 is increased to be higher than 85 ℃, a sealing ring 7 made of polypropylene material is softened and/or partially dissolved at high temperature, the sealing state of the battery shell 3 is damaged, so that a sealing rubber ball 41 covering a through hole 11 is subjected to upward pressure, extrusion deformation, the through hole 11 is opened, the gas in the battery shell 3 is discharged from the through hole 11, the gas discharged from the battery shell 3 can be discharged from a check valve 6 arranged on an explosion-proof valve 4, the internal pressure of the battery shell 3 is reduced, and the sealing rubber ball 41 rebounds, the through holes 11 are continuously covered, so that the purposes of pressure relief and explosion prevention are achieved, and meanwhile, the electrolyte inside the battery shell 3 can be prevented from leaking to pollute the environment.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a battery pack, includes top cap (1), bottom (2), battery housing (3), explosion-proof valve (4), venthole (5), check valve (6), its characterized in that:

a top cover (1) is fixedly arranged at the top of the battery shell (3), and a bottom cover (2) is fixedly arranged at the bottom of the battery shell (3);

the battery shell (3), the top cover (1) and the bottom cover (2) are encircled to form a closed hollow cavity structure;

through holes (11) penetrating through the top cover (1) are symmetrically arranged on the top cover (1) from left to right, and the through holes (11) are designed in a circular structure;

the top cover (1) is provided with an anode (12) electrically connected with the anode of the battery and a cathode (13) electrically connected with the cathode of the battery;

a sealing ring (7) is arranged on the through hole (11), and an explosion-proof valve (4) is arranged on the top cover (1) corresponding to the through hole (11);

the explosion-proof valve (4) is circumferentially provided with air outlet holes (5) penetrating through the valve body in an array manner, and the outer wall of the explosion-proof valve (4) is provided with check valves (6) corresponding to the air outlet holes (5);

explosion-proof valve (4) are cavity structures just explosion-proof valve (4) inside cavity department is provided with sealing rubber ball (41), sealing rubber ball (41) cover through-hole (11) set up just sealing rubber ball (41) surface top is by explosion-proof valve (4) inner wall top setting.

2. A battery assembly according to claim 1, wherein: the cross section of the explosion-proof valve (4) is of an isosceles trapezoid structure and is arranged at an included angle of 45 degrees.

3. A battery assembly according to claim 1, wherein: check valve (6) include aiutage (61), wind hole (62), connecting plate (63), from apron (64) and hinge post (65), be provided with wind hole (62) on aiutage (61) and wind hole (62) and venthole (5) position correspond to set up, set up on aiutage (61) through hinge post (65) activity from apron (64) and apron (64) accessible hinge post (65) is rotatory for aiutage (61).

4. A battery assembly according to claim 3, wherein: the connecting plate (63) is fixedly connected with the outer wall of the explosion-proof valve (4) and is arranged at the air outlet end of the exhaust funnel (61) at an included angle of 17 degrees from the cover plate (64).

5. A battery assembly according to claim 1, wherein: the battery shell (3) is made of stainless steel materials, and a nickel plating layer is arranged on the inner wall of the battery shell (3).

6. A battery assembly according to claim 1, wherein: the sealing ring (7) is made of polypropylene material, and the polypropylene material can be softened and/or partially melted at the high temperature of 85-100 ℃.

7. A battery assembly according to claim 1, wherein: the sealing rubber ball (41) is elastically deformable under external pressure and the sealing rubber ball (41) is made of a corrosion-resistant material.