CN211062779U

CN211062779U - Novel laminate polymer battery relief valve and laminate polymer battery

Info

Publication number: CN211062779U
Application number: CN201922119745.0U
Authority: CN
Inventors: 陈新虹
Original assignee: Suzhou Yilai Kede Technology Co ltd
Current assignee: Suzhou Yilai Kede Technology Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-07-21
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a novel soft package battery relief valve, which comprises a pressure pipe and a pressure cap which are fixedly connected, wherein the pressure pipe is hollow inside, the pressure pipe is provided with a first end far away from the pressure cap and a second end close to the pressure cap, the first end is funnel-shaped, a ball valve is arranged inside, the diameter of the ball valve is larger than the narrow caliber of the first end, a communicated pressure relief hole is also arranged in the pressure cap, the pressure relief hole is communicated with the second end, and an elastic component is arranged between the ball valve and the second end; the pressure relief valve has a sealing state and a pressure relief state, in the sealing state, the elastic part is in a natural state, and the peripheral surface of the ball valve abuts against the first end to seal the space between the first end and the soft package battery; under the pressure release state, elastomeric element is compressed, and ball valve and first end separation, first end and laminate polymer battery intercommunication. This relief valve simple structure, the volume is less, can install this relief valve to laminate polymer battery through the white glue on, this relief valve can discharge laminate polymer battery too big pressure, ensures its security performance.

Description

Novel laminate polymer battery relief valve and laminate polymer battery

Technical Field

The utility model relates to a laminate polymer battery to and a relief valve that is used for laminate polymer battery.

Background

At present, the conventional pressure release valve is only used in a hard-shell battery use scene, but no pressure release valve is designed particularly for a soft package battery. The traditional soft package battery only has a sealing structure. Due to the characteristics of plastic package packaging of the soft package battery, the plastic package film is soft, so that the soft package battery is lack of reliable installation of a local support pressure release valve. In addition, the soft package battery is usually small in size, and the sealed edge of the soft package battery is smaller in size and is generally about 5-10 mm. However, the existing pressure relief valve has a large volume and cannot meet the size requirement of being installed on a soft package battery. The conventional pressure release valve has the defects that the conventional pressure release valve cannot be applied to a soft package battery, so that the soft package battery cannot meet the requirement on safety during work and abnormal work, and the situation of danger such as battery explosion caused by overlarge pressure during abnormal work exists.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the prior art, the embodiment of the utility model provides a novel laminate polymer battery relief valve, this relief valve simple structure realizes the miniaturization easily, can install on laminate polymer battery.

The pressure relief valve comprises a pressure pipe and a pressure cap, wherein the pressure pipe is fixedly connected with the pressure cap, the pressure pipe is hollow, the pressure pipe is provided with a first end far away from the pressure cap and a second end close to the pressure cap, the first end is funnel-shaped, a ball valve is arranged in the first end, the diameter of the ball valve is larger than the narrow caliber of the first end, a through pressure relief hole is further formed in the pressure cap, the pressure relief hole is communicated with the second end of the pressure pipe, and an elastic component is arranged between the ball valve and the second end;

the pressure relief valve has a sealing state and the pressure relief state, in the sealing state, the elastic part is in a natural state, and the outer peripheral surface of the ball valve abuts against the first end so that the space between the first end and the soft package battery is closed;

under the pressure release state, elastomeric element is compressed, the ball valve with first end separation, first end with laminate polymer battery intercommunication.

Further, the ball valve is coaxially arranged with the pressure relief hole and the pressure pipe.

Further, the pressure cap has a body portion and a protrusion extending into the pressure tube from the second end, and the spring is sleeved outside the protrusion.

Further, the pressure pipe has an internal thread, the body portion of the pressure cap has an external thread, and the pressure pipe and the pressure cap are threadedly connected.

Further, the pressure cap has an edge portion that is pressed against an end of the pressure tube.

Further, the middle part outside of pressure pipe wraps and is provided with the white glue, the relief valve passes through the white glue with laminate polymer battery's plastic-aluminum membrane hot melt encapsulation extremely laminate polymer battery is last.

Further, the thickness of the white glue is 100 μm.

Further, the white glue is made of a PP material; the white glue can be replaced by black glue and yellow glue.

Further, the pressure release valve can be mounted at any position of the edge sealing of the soft package battery, and the diameter of the pressure release valve is 10 mm.

Further, the utility model discloses still include a laminate polymer battery, laminate polymer battery is last to be provided with as above the relief valve.

The utility model has the advantages as follows:

this relief valve simple structure, the volume is less, can install to laminate polymer battery through the white glue on, prevents laminate polymer battery's the too big circumstances such as explosion that leads to of pressure. Meanwhile, the air leakage can be prevented under normal conditions, and the electrolyte is prevented from leaking and conducting in a single direction under certain pressure.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a pouch battery and a pressure relief valve in an embodiment of the present invention;

fig. 2 is a schematic view of a pressure relief valve in a sealed state according to an embodiment of the present invention;

fig. 3 is a schematic diagram of the pressure relief valve in the embodiment of the present invention in a pressure relief state.

Reference numerals of the above figures: a pressure relief valve-100; a pressure pipe-1; a first end-11; a second end-12; internal threads-121; a flow-through passage-14; a ball valve-2; an elastic member-3; a pressure cap-4; a pressure relief hole-41; a body portion-42; an edge portion-421; external thread-422; a projection-43; 5, white glue; laminate polymer battery-200.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

In order to achieve the above object, the utility model provides a relief valve for laminate polymer battery, as shown in fig. 1 ~ 3. This relief valve 100 includes pressure pipe 1 and pressure cap 4, pressure pipe 1 with pressure cap 4 fixed connection, the inside cavity of pressure pipe 1, pressure pipe 1 has and keeps away from the first end 11 of pressure cap 4, and is close to the second end 12 of pressure cap 4, first end 11 is hourglass hopper-shaped, be provided with ball valve 2 in the first end 11. And the diameter of the ball valve 2 is larger than the narrow caliber of the first end 11. The pressure cap 4 is further provided with a through pressure relief hole 41, the pressure relief hole 41 is communicated with the second end 12 of the pressure pipe 1, and an elastic component 3 is arranged between the ball valve 2 and the second end 12.

The pressure relief valve 100 has a sealed state and a pressure relief state, in the sealed state, as shown in fig. 2, the elastic component 3 is in a natural state, and the outer peripheral surface of the ball valve 2 abuts against the first end 11 so that the space between the first end 11 and the soft package battery 200 is closed;

in the pressure relief state, as shown in fig. 3, the elastic component 3 is compressed, the ball valve 2 is separated from the first end 11, and the first end 11 is communicated with the pouch battery 200.

The utility model discloses in can with 11 looks butt's of first end ball valve 2 through the setting, under the out-of-work or normal operating state of laminate polymer battery 200, this ball valve 2 can cut off the intercommunication between 11 and the laminate polymer battery 200 of first end, seals pressure pipe 1 for relief valve 100 is in encapsulated situation. When laminate polymer battery 200 abnormal work, laminate polymer battery 200 to pressure is given to first end 11, can overcome elastomeric element 3's elasticity when this pressure value reaches the certain degree and promote ball valve 2 and remove and keep away from first end 11, make ball valve 2 break away from first end 11, first end 11 and laminate polymer battery 200 are linked together, consequently pressure pipe 1 is held 12 through first end 11 and second, form circulation route 14 between the pressure release hole 41, like the arrow direction in fig. 3, thereby laminate polymer battery 200 and external intercommunication, and then can discharge the pressure in laminate polymer battery 200 to the external world through relief valve 100, the emergence of dangerous situations such as laminate polymer battery 200 explosion has been avoided.

Preferably, in this embodiment, the elastic component 3 is a spring, and the ball valve 2 is arranged coaxially with the pressure relief hole 41 and the pressure pipe 1. When the relief valve 100 is in the relief state, the pressure acting on the ball valve 2 is more balanced, and the pressure can be maximally discharged from the relief hole 41.

Specifically, in the present embodiment, the pressure cap 4 has a main body 42 and a protrusion 43, the protrusion 43 extends into the pressure tube 1 from the second end 12, and the spring is sleeved outside the protrusion 43. The body portion 42 of the pressure cap 4 has external threads 422. Preferably, the second end 12 of the pressure tube 1 is of the groove type, the side walls of which are provided with an internal thread 121. The pressure pipe 1 and the pressure cap 4 are screwed together. In addition, the body portion 42 of the pressure cap 4 has a rim portion 421, and the rim portion 421 presses against the end of the pressure tube 1, so that the pressure tube 1 is fixedly connected with the pressure cap 4.

Regarding the installation of the pressure release valve 100, the middle outside of the pressure pipe 1 is wrapped by white glue 5, and the pressure release valve 100 is packaged on the soft package battery 200 through the white glue 5 and the aluminum plastic film of the soft package battery 200 by hot melting.

Preferably, the white glue 5 is made of a PP material. In addition, the white glue 5 forms a packaging area, and the pressure relief valve 100 can be installed at any position of the edge sealing of the soft package battery 200.

In the present embodiment, the thickness of the white glue 5 is 100 μm. The diameter of the pressure release valve 100 is 10 mm. In other embodiments, the white glue 5 can be replaced by black glue or yellow glue.

Compared with the conventional relief valve, the relief valve 100 has a simple structure, is small in size, and can be miniaturized, as shown in fig. 1. The pressure relief valve 100 can be mounted on the pouch battery 200 by the pressure relief valve 100 through the white glue 5. The technical problem that the pressure release valve is not easy to install in the soft package battery 200 is solved. Meanwhile, the air leakage can be prevented under normal conditions, and the electrolyte is prevented from leaking and conducting in a single direction under certain pressure.

The utility model discloses still include a laminate polymer battery 200, be provided with above-mentioned relief valve 100 on this laminate polymer battery 200.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The novel pressure release valve for the soft package battery is characterized by comprising a pressure pipe and a pressure cap, wherein the pressure pipe is fixedly connected with the pressure cap, the pressure pipe is hollow inside, the pressure pipe is provided with a first end far away from the pressure cap and a second end close to the pressure cap, the first end is funnel-shaped, a ball valve is arranged in the first end, the diameter of the ball valve is larger than the narrow caliber of the first end, a through pressure release hole is further formed in the pressure cap, the pressure release hole is communicated with the second end of the pressure pipe, and an elastic component is arranged between the ball valve and the second end;

the pressure relief valve has a sealing state and a pressure relief state, in the sealing state, the elastic part is in a natural state, and the outer peripheral surface of the ball valve abuts against the first end so that the space between the first end and the soft package battery is closed;

2. The novel laminate battery pressure relief valve as claimed in claim 1, wherein said ball valve is coaxially disposed with said pressure relief hole and said pressure tube.

3. The new pouch-cell pressure relief valve of claim 2 wherein said pressure cap has a body portion and a protrusion extending into said pressure tube from said second end, said spring being sleeved outside said protrusion.

4. The new pouch-cell pressure relief valve as defined in claim 3 wherein said pressure tube has internal threads and said body portion of said pressure cap has external threads, said pressure tube and said pressure cap being threadably connected.

5. The new pouch cell pressure relief valve as defined in claim 4 wherein the pressure cap has a rim portion that presses against the end of the pressure tube.

6. The novel pressure release valve for the soft package battery as claimed in claim 5, wherein a white glue is wrapped around the outside of the middle part of the pressure pipe, and the pressure release valve is packaged on the soft package battery through hot melting of the white glue and an aluminum plastic film of the soft package battery.

7. The novel pressure relief valve for the pouch battery as defined in claim 6, wherein the thickness of the white glue is 100 μm.

8. The novel pressure release valve for the soft package battery according to claim 7, wherein the white glue is made of PP (polypropylene); the white glue can be replaced by black glue and yellow glue.

9. The novel pressure relief valve for the soft package battery according to claim 8, wherein the pressure relief valve can be mounted at any position of the edge sealing of the soft package battery, and the diameter of the pressure relief valve is 10 mm.

10. A soft package battery is characterized in that the pressure release valve is arranged on the soft package battery, and the pressure release valve is as claimed in any one of claims 1 to 9.