CN211062778U

CN211062778U - A relief valve and laminate polymer battery for laminate polymer battery

Info

Publication number: CN211062778U
Application number: CN201922119650.9U
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 relief valve for laminate polymer battery, including pressure pipe and pressure cap, the pressure pipe has entrance portion and exit portion, pressure pipe and pressure cap fixed connection, the first end of pressure pipe far away from the pressure cap is hopper-shaped, the first end is connected with the entrance portion, the inside of pressure pipe is provided with end cap and stifled pole, stifled pole and end cap fixed connection to wear to establish to the pressure cap from the pressure pipe, still be provided with at least one pressure release hole that link up in the pressure cap, the pressure release hole communicates with the exit portion of pressure pipe; the pressure relief valve has a sealing state and a pressure relief state, and in the sealing state, the plug blocks the first end of the pressure pipe to seal the pressure pipe; under the pressure release state, the first end of pressure pipe is kept away from to end cap and stifled pole, and the pressure pipe passes through first end and import portion intercommunication. This relief valve simple structure can realize the miniaturization, and the rethread white glue can be installed to laminate polymer battery on and prevent that laminate polymer battery pressure from leading to the circumstances such as explosion too big.

Description

A relief valve and laminate polymer battery for 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 relief valve for laminate polymer battery, 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 provided with an inlet part and an outlet part, the pressure pipe is fixedly connected with the pressure cap, the pressure pipe is hollow, the first end, far away from the pressure cap, of the pressure pipe is funnel-shaped, the first end is connected with the inlet part, a plug and a blocking rod are arranged in the pressure pipe, the plug is close to the first end, the outer side wall of the plug is matched with the inner side wall of the first end, the blocking rod is fixedly connected with the plug and penetrates through the pressure pipe to the pressure cap, at least one through pressure relief hole is further arranged in the pressure cap, and the pressure relief hole is communicated with the outlet part of the pressure pipe;

The pressure relief valve has a sealing state and a pressure relief state, and in the sealing state, the plug blocks the first end of the pressure pipe to seal the pressure pipe;

In the pressure relief state, the plug and the plug rod are far away from the first end of the pressure pipe, and the pressure pipe is communicated with the inlet part through the first end, so that the inlet part is communicated with the outlet part.

Furthermore, a through hole is formed in the pressure cap, the blocking rod penetrates through the pressure cap through the through hole, the blocking rod is located in the pressure cap in the sealing state, and the blocking rod partially protrudes out of the pressure cap in the pressure relief state.

Furthermore, the plugging rod is provided with a body part and a plugging rod head, the plugging rod head extends into the plug, a spring is further arranged on the periphery of the body part, one end of the spring props against the plugging rod head, and the other end of the spring props against an outlet part of the pressure pipe.

Further, the plug is provided with a sunken part, the plug head is provided with a flange and a disc part, the flange is matched with the sunken part, the disc part props against the end part of the plug, and one end of the spring props against the disc part.

Further, the plug is made of rubber.

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

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 microns, and a PP material is adopted; 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:

The pressure release valve is simple in structure, small in size, only 10 mm in diameter and suitable for being used on the pressure release valve;

Link to each other with plastic-aluminum membrane hot melt through the white glue and can encapsulate the relief valve on laminate polymer battery, can solve laminate polymer battery and go up the technical problem who is difficult for installing the relief valve to prevent laminate polymer battery's the too big circumstances such as explosion that leads to of 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; an inlet section-10; an outlet portion-11; a first end-12; a second end-13; an internal thread-131; a flow-through passage-14; a plug-2; a recess-21; a blocking rod-3; a plugging rod head-31; a flange-311; a disc portion-312; a body portion-32; a spring-4; a pressure cap-5; a pressure relief vent-51; a through-hole-52; external thread-53; 6, 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 purpose, the utility model provides a relief valve for laminate polymer battery, as shown in fig. 1 ~ 3. The periphery of this relief valve 100 is wrapped up in white glue 6, and relief valve 100 encapsulates to laminate polymer battery 200 on through white glue 6 and laminate polymer battery 200's plastic-aluminum membrane hot melt connection. The technical problem that the conventional pressure release valve is not easy to install on the soft package battery is solved. The pressure relief valve 100 includes a pressure pipe 1 and a pressure cap 5, the pressure pipe 1 and the pressure cap 5 are fixedly connected, and both ends of the pressure pipe 1 in the axial direction thereof have an inlet portion 10 and an outlet portion 11, respectively. The pressure pipe 1 is hollow, the end part of the pressure pipe 1 far away from the pressure cap 5 is a first end 12, and the end part close to the pressure cap 5 is a second end 13. The first end 12 is funnel-shaped, and the first end 12 is connected to the inlet portion 10, preferably, a narrow mouth of the funnel-shaped is connected to the inlet portion 10. The pressure pipe 1 is provided with end cap 2 and stifled pole 3 in the inside, end cap 2 is close to first end 12, the lateral wall of end cap 2 agrees with the inside wall of first end 12. The blocking rod 3 is fixedly connected with the blocking head 2 and penetrates through the pressure pipe 1 to the pressure cap 5, at least one through pressure relief hole 51 is further formed in the pressure cap 5, and the pressure relief hole 51 is communicated with the outlet portion 11 of the pressure pipe 1.

The pressure relief valve 100 has a sealed state in which the plug 2 blocks the first end 12 of the pressure tube 1 to seal the pressure tube 1, as shown in fig. 2, and the pressure relief state.

In the pressure relief state, as shown in fig. 3, the plug 2 and the plug rod 3 are far away from the first end 12 of the pressure tube 1, and the pressure tube 1 is communicated with the inlet part 10 through the first end 12, so that the inlet part is communicated with the outlet part.

The utility model discloses in can with the end cap 2 that the inboard wall of first end 12 agrees with through the setting, under the out-of-work or the state of normal work of laminate polymer battery 200, this end cap 2 can cut off the intercommunication between first end 12 and the import portion 10, seals pressure pipe 1 for relief valve 100 is in encapsulated situation. When laminate polymer battery 200 abnormal work, laminate polymer battery 200 to import portion 10 gives pressure, can promote end cap 2 to remove when this pressure value reaches the certain degree and keep away from first end 12, make end cap 2 and first end 12 alternate segregation, import portion 10 and first end 12 are linked together, consequently pressure pipe 1 is through first end 12 and import portion 10, form circulation route 14 between the pressure release hole 51, 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.

Specifically, in this embodiment, the outer side wall of the plug 2 is conical and can be engaged with the inner side wall of the first end 12, and the plug 2 has a recess 21. The blocking rod 3 comprises a body part 32 and a blocking rod head 31, the blocking rod head 31 comprises a flange 311 and a disc part 312, the flange 311 extends into the concave part 21 and is matched with the concave part, and the disc part 312 is propped against the end part of the plug 2, so that the fixed connection between the plug 2 and the blocking rod 3 is realized.

Further, a through hole 52 is provided in the pressure cap 5, and the body portion 32 of the stem 3 is inserted into the through hole 52 from the pressure tube 1. In the pressure relief state, the plug 2 can move along the through hole 52 along with the blocking rod 3, and the through hole 52 provides a guiding function for the movement of the plug 2 and the blocking rod 3. In addition, the blocking rod 3 can move in the through hole 52, and in a sealing state, the blocking rod 3 is positioned in the pressure cap 5; in the pressure relief state, the blocking rod 3 partially protrudes from the pressure relief cap, so that the pressure relief valve 100 can be clearly known to be in the pressure relief state, and whether the pressure relief valve 100 is in the sealing state or the pressure relief state can be clearly distinguished.

Preferably, the plug 2 is made of rubber, so that the plug 2 is attached to the first end 12 more tightly, and a better sealing effect is obtained.

Further, the spring 4 is provided on the outer periphery of the body portion 32 of the stem 3, and one end of the spring 4 abuts against the disk portion 312 of the stem head 31 and the other end abuts against the outlet portion 11 of the pressure tube 1. In the sealing state, the spring 4 is in the original state; when the pressure relief state, end cap 2 removes and makes spring 4 obtain the elastic force by the compression, and when laminate polymer battery 200's pressure release finished, under the effect of elastic force, can drive end cap 2 and be close to first end 12 and move until blocking up first end 12 again. Consequently spring 4 can make end cap 2 automatic re-setting, and automatic recovery to encapsulated situation after laminate polymer battery 200 pressure release finishes need not artifical manual reset, and is more convenient.

Preferably, the second end 13 of the pressure tube 1 is of the groove type, said outlet portion 11 being located at the bottom of the groove, the side wall of the groove being provided with an internal thread 131. The pressure cap 5 has a protruding portion and an edge portion, the edge portion of the pressure cap 5 being pressed against the end of the second end 13. The outer side wall of the protruding part is provided with an external thread 53, the protruding part extends into the groove, and the external thread 53 of the protruding part is matched with the internal thread 131 of the groove, so that the pressure pipe 1 is fixedly connected with the pressure cap 5.

The relief valve 100 is simpler in structure and smaller in volume than a conventional relief valve, and can be set to a diameter of 10 mm, and can be made smaller than the pouch battery 200, as shown in fig. 1. The miniaturized pressure relief valve 100 is more suitable for the pouch battery 200.

Regarding the installation of the pressure relief valve 100, white glue 6 with the thickness of 100 μm is wrapped around the outer side of the middle part of the pressure pipe 1, and the pressure relief valve 100 is packaged on the soft package battery 200 through the hot melting connection of the white glue 6 and the aluminum plastic film of the soft package battery 200.

Preferably, the white glue 6 is made of a PP material. In addition, the white glue 6 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 other embodiments, the pressure relief valve 100 may be packaged onto the pouch battery 200 with black glue, yellow glue, or the like.

This relief valve 100 has realized miniaturization through simple structure, and this relief valve 100 can be installed on laminate polymer battery 200 through white glue 6 again. The technical problem that the pressure release valve is not easy to install on the soft package battery 200 is solved.

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. A pressure release valve for a soft package battery is characterized by comprising a pressure pipe and a pressure cap, wherein the pressure pipe is provided with an inlet part and an outlet part, the pressure pipe is fixedly connected with the pressure cap, the pressure pipe is hollow inside, a first end, far away from the pressure cap, of the pressure pipe is funnel-shaped, the first end is connected with the inlet part, a plug and a blocking rod are arranged inside the pressure pipe, the plug is close to the first end, the outer side wall of the plug is matched with the inner side wall of the first end, the blocking rod is fixedly connected with the plug and penetrates through the pressure pipe to the pressure cap, at least one through pressure release hole is further formed in the pressure cap, and the pressure release hole is communicated with the outlet part of the pressure pipe;

2. The pressure release valve for the laminate polymer battery as claimed in claim 1, wherein a through hole is provided in the pressure cap, the blocking rod passes through the pressure cap through the through hole, the blocking rod is located in the pressure cap in the sealing state, and the blocking rod partially protrudes out of the pressure cap in the pressure release state.

3. The pressure release valve for the laminate polymer battery as claimed in claim 2, wherein the stopper rod has a body part and a stopper rod head, the stopper rod head extends into the stopper rod, a spring is further arranged on the outer periphery of the body part, one end of the spring abuts against the stopper rod head, and the other end of the spring abuts against the outlet part of the pressure pipe.

4. The pressure relief valve for the soft package battery according to claim 3, wherein the plug has a recess, the plug head has a flange and a disk portion, the flange is fitted with the recess, the disk portion abuts against an end of the plug, and one end of the spring abuts against the disk portion.

5. The pressure release valve for the laminate battery according to claim 4, wherein the plug is made of rubber.

6. The pressure relief valve for pouch cells as defined in claim 5 wherein said pressure tube has internal threads, said pressure cap has external threads, and said pressure tube and said pressure cap are threadedly connected.

7. The pressure release valve for the soft package battery according to claim 6, 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.

8. The pressure release valve for the soft package battery according to claim 7, wherein the thickness of the white glue is 100 μm, and the white glue is made of PP (polypropylene); the white glue can be replaced by black glue and yellow glue.

9. The 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.