CN115693053A

CN115693053A - Power battery filling opening plugging device

Info

Publication number: CN115693053A
Application number: CN202211455126.9A
Authority: CN
Inventors: 陈小明
Original assignee: Pem China Co ltd
Current assignee: Pem China Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-02-03

Abstract

The invention discloses a plugging device for a liquid injection port of a power battery, which is used for plugging the liquid injection port on a cover plate of the power battery and comprises: the device comprises a device body, a liquid inlet and a liquid outlet, wherein a first end and a second end are respectively formed on two sides of the device body, and a connecting part used for being connected with the liquid inlet is arranged on the outer part of the device body in the circumferential direction; the elastic unit is arranged in the device body and is made of elastic rubber; the liquid injection unit is provided with a needle head part and a liquid storage cavity communicated with the needle head part, the needle head part can penetrate through the elastic unit, and one end, far away from the liquid storage cavity, of the needle head part is provided with a liquid outlet hole. The invention ensures that the performance of the power battery is more stable, the existing cover plate is not required to be improved, and the whole plugging device is energy-saving, high-efficiency and reliable in plugging performance. In addition, the effect of conveniently and quickly replacing or updating the electrolyte can be achieved.

Description

Power battery annotates liquid mouth plugging device

Technical Field

The invention relates to the field of power battery parts, in particular to a plugging device for a liquid injection port of a power battery.

Background

With the large-scale appearance of electric vehicles, the power battery used in the electric vehicle is also becoming the key for the development of the power vehicle. The power battery in the prior art is shown in fig. 1 and mainly comprises a pipe body and a cover plate connected with the pipe body, wherein a key step of the conventional power battery is to fill electrolyte into the pipe body. However, in the prior art, a welding method needs to be adopted in the plugging process, and heat generated in the welding process can cause irreversible influence and damage to the quality of the electrolyte, so that the power battery cannot achieve the optimal performance. In addition, due to the irreversibility of the welding mode, when the electrolyte needs to be replaced or filled, the power battery in the prior art is difficult to achieve the corresponding effect, and therefore the problem of low reusability exists.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides a power battery liquid filling port plugging device which is used for solving one or more of the problems.

The embodiment of the application discloses: the utility model provides a power battery annotates liquid mouth plugging device for annotate liquid mouth to on the power battery apron and carry out the shutoff, include: the device comprises a device body, a first end and a second end are respectively formed on two sides of the device body, a connecting part used for being connected with the liquid injection port is arranged on the outer portion of the device body in the circumferential direction of the device body, the inner portion of the device body is arranged in a penetrating mode, and after the liquid injection port is connected with the connecting part, the liquid injection port and the connecting part are closed; the elastic unit is arranged in the device body and is made of elastic rubber, and two sides of the elastic unit are respectively communicated with the first end and the second end; the liquid injection unit is provided with a needle head part and a liquid storage cavity communicated with the needle head part, the needle head part can penetrate through the elastic unit, and one end of the needle head part, which is far away from the liquid storage cavity, is provided with a liquid outlet hole; after the needle head penetrates through the elastic unit, the liquid outlet hole and the liquid storage cavity are respectively positioned at two sides of the elastic unit.

Further, the elastic unit is a fluorosilicone rubber piece.

Further, the elastic unit is provided with a plurality of layers, and the plurality of layers of elastic units are stacked in the thickness direction of the device body.

Further, the elastic unit is connected with the device body in a press riveting mode.

Further, the connecting part is connected with the liquid injection port in a press riveting mode.

Furthermore, the connecting part is arranged between the first end and the second end, the connecting part is connected with the liquid injection port in a rivet turning mode, and after rivet turning, a flanging is formed on the device body around the first end.

Further, the connecting part is provided with a thread, and the connecting part is in threaded connection with the liquid injection port.

The invention has the following beneficial effects:

1. the plugging device can be connected with the mounting port firstly, so that after electrolyte is filled, the risk of irreversible influence and damage to the quality of the electrolyte due to welding heat is avoided, the performance of the power battery is more stable, the existing cover plate does not need to be improved, and the whole plugging device is energy-saving and efficient and has reliable plugging performance. In addition, the effect of conveniently and quickly replacing or updating the electrolyte can be realized.

2. Because fluorine silicon rubber spare has better corrosion resisting property and high and low temperature, and its elasticity is better to can make whole elastic element's reuse performance higher, and then make whole plugging device's life more of a specified duration.

3. The multilayer elastic unit's setting can make the limit of tearing that forms have the multilayer, and multilayer tear the limit and can form the range upon range of effect of multilayer tear the limit again after resilience to make after resilience the elastic unit has better leakproofness.

In order to make the aforementioned and other objects, features and advantages of the 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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a power battery cover plate in the prior art according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a cover plate corresponding to a plugging device for a liquid injection port of a power battery in an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a power battery liquid filling port plugging device before riveting in the embodiment of the invention;

FIG. 4 is a schematic structural diagram of a plugging device for a liquid injection port of a power battery after riveting in the embodiment of the invention;

FIG. 5 is a schematic structural diagram of a power battery liquid filling port plugging device before rivet turning in the embodiment of the invention;

FIG. 6 is a schematic structural diagram of the plugging device for the liquid injection port of the power battery after being riveted in the embodiment of the invention;

FIG. 7 is a schematic structural diagram of a power battery liquid filling port plugging device in the embodiment of the invention, which is matched with a liquid filling unit after riveting;

FIG. 8 is a schematic structural diagram of a power battery liquid filling port plugging device in the embodiment of the invention when the power battery liquid filling port plugging device is matched with a liquid filling unit after being turned over and riveted;

FIG. 9 is a schematic structural diagram of a liquid injection unit in an embodiment of the present invention;

reference numerals of the above figures: 1. a device body; 11. a first end; 12. a second end; 2. a connecting portion; 3. an elastic unit; 4. a cover plate; 5. a liquid injection port; 6. a liquid injection unit; 61. a needle head section; 611. a liquid outlet hole; 62. a liquid storage cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 2 to 9, the power battery liquid filling opening blocking device of the present embodiment is used for blocking a liquid filling opening 5 on a power battery cover plate 4, in the present embodiment, the cross-sectional shape of the liquid filling opening 5 is circular, but of course, in other alternative embodiments, the shape of the liquid filling opening 5 may be adjusted according to actual needs. The occlusion device comprises:

in this embodiment, the first end 11 is an upper end in fig. 3 to 8, and the second end 12 is a lower end in fig. 3 to 8, and in other optional embodiments, specific positions of the first end 11 and the second end 12 may be adjusted according to actual needs. The exterior of the device body 1 is provided with a connecting portion 2 for connecting with the pouring port 5 in the circumferential direction thereof, so that the device body 1 can be connected with the pouring port 5 in the circumferential direction thereof, and the first end 11 and the second end 12 can be located on both sides of the pouring port 5, respectively. The connecting part 2 may be riveted to the liquid inlet 5, but in other alternative embodiments, the connecting part 2 may be connected to the liquid inlet 5 in other sealing manners. The device body 1 can be arranged in a through mode, after the liquid injection port 5 is connected with the connecting part 2, the liquid injection port 5 is closed with the connecting part 2, and therefore electrolyte is prevented from flowing out of the middle of the liquid injection port 5 and the connecting part 2.

The elastic unit 3 is arranged inside the device body 1, the elastic unit 3 is made of elastic rubber, and two sides of the elastic unit 3 are communicated with the first end 11 and the second end 12 respectively, so that the elastic unit 3 can isolate the first end 11 from the second end 12 in an initial state, and an electrolyte sealing effect is achieved.

The liquid injection unit 6 is provided with a needle head part 61 and a liquid storage cavity 62 communicated with the needle head part 61, electrolyte can be arranged in the liquid storage cavity 62, the needle head part 61 can penetrate through the elastic unit 3, and a liquid outlet hole 611 is arranged at one end, far away from the liquid storage cavity 62, of the needle head part 61, so that the liquid outlet hole 611 can be arranged on one side, close to the second end 12, of the elastic unit 3 along with the needle head part 61, and then the effect of filling or replacing the electrolyte is realized by applying different-direction pressure to the liquid storage cavity 62.

In this embodiment, before filling the electrolyte, the connecting portion 2 is already connected to the injection port 5, and the needle portion 61 is used to penetrate the elastic unit 3, so that the liquid outlet hole 611 can be disposed on the side of the elastic unit 3 adjacent to the second end 12 along with the needle portion 61, and after the needle portion 61 penetrates the elastic unit 3, the liquid outlet hole 611 and the liquid storage chamber 62 are respectively located on both sides of the elastic unit 3, in this process, the elastic unit 3 forms a tear edge around the needle portion 61. When electrolyte needs to be filled, positive pressure is applied to the liquid storage cavity 62, so that the electrolyte in the liquid storage cavity 62 can be injected into the inner side of the cover plate 4, namely into the tube body of the power battery, through the liquid outlet hole 611; when electrolyte needs to be extracted, the liquid outlet hole 611 is in contact with the electrolyte inside the power battery, and reverse pressure is applied to the liquid storage cavity 62, so that the electrolyte inside the liquid storage cavity 62 can be sucked out of the inner side of the cover plate 4 through the liquid outlet hole 611, that is, the electrolyte inside the tube body of the power battery is sucked into the liquid storage cavity.

After filling or extracting the electrolyte, the tip segment 61 is removed from the elastic unit 3, and under the elastic recovery of the elastic material itself, the tearing edges are close to each other to block the area where the original tip segment 61 exists. Thereby again achieving the effect of isolating the first end 11 from the second end 12. In addition, because the back is annotated or changed electrolyte, inside the body of whole power battery is flooded to electrolyte to can make the liquid of electrolyte to the even effort of applying of elastic element 3, thereby further make elastic element 3 realize the effect that resets.

Borrow by above-mentioned structure, can be connected plugging device and installing port earlier for after filling electrolyte, do not cause irreversible influence and the risk of destruction because of the welding heat to the electrolyte quality, and then make power battery's performance more stable, and can not need to improve current apron 4, whole plugging device is energy-conserving high-efficient, the shutoff dependable performance. In addition, the effect of conveniently and quickly replacing or updating the electrolyte can be realized.

Specifically, the elastic unit 3 is a fluorosilicone rubber member. Because fluorine silicon rubber spare has better corrosion resisting property and high and low temperature, and its elasticity is better to can make whole elastic element 3's reuse performance higher, and then make whole plugging device's life more of a specified duration.

Specifically, the elastic unit 3 is provided with a plurality of layers, and the plurality of layers of the elastic units 3 are stacked in the thickness direction of the device body 1. In this embodiment, the elastic unit 3 has 3 layers, so that the cost is saved as much as possible on the premise of ensuring the sealing performance. Of course, in other alternative embodiments, the number of layers of the elastic units 3 may be adjusted according to actual situations. The arrangement of the elastic units 3 with multiple layers can enable the formed tearing edges to have multiple layers, and the multilayer tearing edges can form the laminating effect of the multilayer tearing edges after rebounding, so that the rebounded elastic units 3 have better sealing performance.

Specifically, the elastic unit 3 is connected to the device body 1 by riveting. Preferably, the apparatus body 1 is press-riveted and fixed to an edge portion of the elastic unit 3. So that the elastic unit 3 can be positioned inside the device body 1 after being clinched, and the elastic unit 3 can have a good fixing effect.

Specifically, the connecting part 2 is connected with the liquid injection port 5 in a press riveting manner. In this embodiment, connecting portion 2 has from closing on the outside a plurality of step faces of device body 1, the step face can be for the curved surface of its internal concave to make after the riveting connection, can provide the holding position for apron 4, thereby make connecting portion 2 with annotate the linkage effect of liquid mouth 5 better. In this embodiment, during the press riveting process, the second end 12 is first inserted into the liquid injection port 5, and then the press riveting is completed. By adopting the connection mode, the connection between the connecting part 2 and the liquid injection port 5 can be ensured, and the mode of high temperature generated by welding and the like can be avoided, so that the effect of protecting the electrolyte in the cover plate 4 can be achieved. In addition, the whole processing process has no welding process, and the qualification rate, the processing efficiency and the product cost of the power battery are greatly improved compared with the prior art.

Specifically, the connecting portion 2 is disposed between the first end 11 and the second end 12, so that the connecting portion 2 around the first end 11 can subsequently form a flange, the connecting portion 2 is connected with the liquid injection port 5 in a rivet-turning manner, and after the rivet-turning manner, the device body 1 around the first end 11 forms a flange. In this embodiment, the connecting portion 2 has a plurality of outward step surfaces adjacent to the device body 1, and the step surfaces may be curved surfaces recessed toward the inside thereof, so that after the rivet is turned over and connected, a holding position can be provided for the cover plate 4, and the connecting portion 2 and the liquid injection port 5 are better in connection effect. In this embodiment, in the rivet-turning process, the first end 11 firstly extends into the liquid injection port 5, then the rivet-turning is completed, and then the cover plate 4 is connected with the pipe body. By adopting the connection mode, on the premise of ensuring the connection effect of the connecting part 2 and the liquid injection port 5, the mode of generating high temperature such as welding and the like is avoided, so that the effect of protecting the electrolyte in the cover plate 4 can be achieved.

Specifically, the connecting part 2 has a screw thread, and the connecting part 2 is screwed with the liquid injection port 5. By adopting the connection mode, the mode that high temperature is generated by welding and the like can be avoided on the premise of ensuring the connection effect of the connecting part 2 and the liquid injection port 5, so that the effect of protecting the electrolyte in the liquid injection port 4 can be achieved.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a liquid mouth plugging device is annotated to power battery for annotate liquid mouth to power battery apron on carry out the shutoff, its characterized in that includes:

the device comprises a device body, a first end and a second end are respectively formed on two sides of the device body, a connecting part used for being connected with the liquid injection port is arranged on the outer part of the device body in the circumferential direction of the device body, the inner part of the device body is arranged in a through mode, and after the liquid injection port is connected with the connecting part, the liquid injection port and the connecting part are closed;

the elastic unit is arranged in the device body and is made of elastic rubber, and two sides of the elastic unit are respectively communicated with the first end and the second end;

the liquid injection unit is provided with a needle head part and a liquid storage cavity communicated with the needle head part, the needle head part can penetrate through the elastic unit, and one end of the needle head part, far away from the liquid storage cavity, is provided with a liquid outlet hole;

after the needle head penetrates through the elastic unit, the liquid outlet hole and the liquid storage cavity are respectively positioned at two sides of the elastic unit.

2. The plugging device for the liquid injection port of the power battery according to claim 1, wherein the elastic unit is a fluorosilicone rubber piece.

3. The power battery electrolyte injection port plugging device according to claim 1, wherein the elastic unit is provided with a plurality of layers, and the plurality of layers of elastic units are stacked in the thickness direction of the device body.

4. The power battery electrolyte injection port plugging device according to claim 1, wherein the elastic unit is press-riveted with the device body.

5. The power battery electrolyte injection port plugging device of claim 1, wherein the connecting portion is press-riveted with the electrolyte injection port.

6. The power battery liquid injection port plugging device according to claim 1, wherein the connecting portion is disposed between the first end and the second end, the connecting portion is connected with the liquid injection port through a rivet, and after the rivet is turned, a flange is formed on the device body around the first end.

7. The device for blocking the liquid filling port of the power battery according to claim 1, wherein the connecting part is provided with a thread, and the connecting part is in threaded connection with the liquid filling port.