CN213304307U

CN213304307U - Power battery sealing structure

Info

Publication number: CN213304307U
Application number: CN202022470888.9U
Authority: CN
Inventors: 马亚强; 吴婷婷; 张万财
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-05-28
Anticipated expiration: 2030-10-30

Abstract

The utility model belongs to the technical field of the battery, a power battery seal structure is disclosed, including top cap (10), be equipped with on top cap (10) and run through notes liquid hole (11) of top cap (10), be equipped with sealed aluminium nail (12) in annotating liquid hole (11), sealed aluminium nail (12) and notes liquid hole (11) interference fit, sealed aluminium nail (12) are including weld portion (121), the below of weld portion (121) is equipped with protruding portion (122) of being connected with weld portion (121), protruding portion (122) overcoat is equipped with rubber portion (13), rubber portion (13) and notes liquid hole (11) interference fit. The utility model discloses in, annotate the sealed efficient in liquid hole, the required equipment of sealed process is few, and is with low costs.

Description

Power battery sealing structure

Technical Field

The utility model belongs to the technical field of the battery, a seal structure of battery top cap is related to, concretely relates to power battery seal structure.

Background

The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. After power battery annotates the liquid at the time of carrying out the secondary, inside in order to prevent that external gas and moisture from entering into electric core in the negative pressure environment in guaranteeing the casing, need seal annotating the liquid hole.

Among the prior art, annotate the liquid hole and seal through the cooperation of sealed glue nail and sealed aluminium nail, sealed glue nail and sealed aluminium nail are two independent parts, need beat sealed glue nail earlier at sealed in-process, weld sealed aluminium nail again, and need pre-compaction earlier during the welding sealed aluminium nail, in advance spot welding, weld in succession again. Such a sealing method has the following disadvantages: 1. the sealing rubber nail beating and the sealing aluminum nail welding are two independent processes, and the sealing efficiency is low; 2. in order to solve the problem of warping of the sealed aluminum nail, prepressing, pre-spot welding and continuous welding are needed to be carried out when the sealed aluminum nail is welded, so that the production efficiency is reduced, and the use cost of equipment is increased.

Therefore, in order to solve these problems, the utility model provides a sealed glue nail and sealed aluminum nail close as an organic whole, and the welding seals glue nail also need not spot welding in advance, directly carries out the power battery seal structure who welds in succession.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power battery seal structure has solved the technical problem that the power battery that prior art exists seals inefficiency, sealed required equipment cost is high, can effectively improve sealed efficiency, reduce cost when it is used.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a power battery seal structure, includes the top cap, be equipped with the notes liquid hole that runs through the top cap on the top cap, annotate the downthehole sealed aluminium nail that is equipped with of liquid, sealed aluminium nail and annotate liquid hole interference fit, sealed aluminium nail includes the weld part, the below of weld part is equipped with the protruding portion with weld part connection, the protruding portion overcoat is equipped with rubber portion, rubber portion and notes liquid hole interference fit.

In any one of the above schemes, preferably, the rubber part is of a cylindrical structure, an installation groove matched with the protruding part is formed in the rubber part, and the protruding part of the sealing aluminum nail is sleeved with the rubber part through the installation groove.

In any one of the above aspects, a vertical portion is preferably provided at an upper end of the welding portion.

In any of the above aspects, preferably, the protruding portion has a truncated cone shape, and a diameter of the protruding portion gradually increases from one end connected to the welded portion to the other end.

In any one of the above aspects, the liquid pouring hole preferably includes a guide portion and an engagement portion, and the guide portion is located above the engagement portion.

In any one of the above embodiments, preferably, the guide portion is chamfered, and an angle between an oblique edge of the guide portion and a horizontal straight line of the mating portion is α 1.

Preferably in any one of the above schemes, the rubber part is in interference fit with the matching part of the liquid injection hole, and the one-side interference is 50-150 um.

In any of the above aspects, the shape of the welding portion is the same as that of the guide portion, and the outer diameter of the welding portion is preferably smaller than the inner diameter of the guide portion.

In any one of the above embodiments, preferably, the lower end of the welded portion is chamfered, an included angle between an oblique edge of the welded portion and a horizontal direction of the protruding portion is α 2, and α 2 < α 1.

The utility model discloses a sealed aluminum nail earlier with the cooperation of rubber portion, seal the notes liquid hole with annotating liquid hole interference fit again.

Compared with the prior art, the utility model, have following advantage:

1. the utility model discloses in, close sealed gluey nail and sealed aluminium nail as an organic whole, reduced the management and control cost of material to reduction in production cost.

2. The utility model discloses in, will annotate the sealed in-process of liquid hole and beat sealed glue nail earlier, the twice process of welding sealed aluminium nail closes one process again, has cancelled the process of pre-compaction and spot welding in advance simultaneously, has reduced the use of equipment, has saved equipment cost, the while still very big improvement sealed aluminium nail's welding efficiency to the sealed efficiency of annotating the liquid hole has been improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a sectional view of the sealing structure of the present invention;

FIG. 2 is a sectional view of the liquid injection hole of the present invention;

fig. 3 is a cross-sectional view of the sealing aluminum nail of the utility model.

Fig. 4 is an enlarged schematic view at a.

Reference numbers and corresponding part names in the drawings:

10-top cover, 11-liquid injection hole, 111-guide part, 112-matching part, 12-sealed aluminum nail, 121-welding part, 1211-vertical part, 122-protruding part and 13-rubber part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail with reference to the following embodiments, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not intended as limitations of the present invention.

Examples

As shown in fig. 1-4, a power battery sealing structure includes a top cover 10, a liquid injection hole 11 penetrating through the top cover 10 is arranged on the top cover 10, a sealing aluminum nail 12 is arranged in the liquid injection hole 11, the sealing aluminum nail 12 is in interference fit with the liquid injection hole 11, the sealing aluminum nail 12 includes a welding portion 121, a protruding portion 122 connected with the welding portion 121 is arranged below the welding portion 121, a rubber portion 13 is sleeved outside the protruding portion 122, and the rubber portion 13 is in interference fit with the liquid injection hole 11.

When this embodiment uses, among the prior art, annotate the liquid hole and seal through sealed glue nail and sealed aluminium nail cooperation, sealed glue nail and sealed aluminium nail are two independent parts, need beat sealed glue nail earlier at sealed in-process, weld sealed aluminium nail again, and need pre-compaction earlier during the sealed aluminium nail of welding, in advance spot welding, weld in succession again. Such sealing is inefficient. In this embodiment, the rubber portion 13 is sleeved on the protruding portion 122 of the aluminum nail 12, so that the aluminum nail 12 and the rubber portion 13 are integrally matched, and the rubber portion 13 is then welded at the welding portion 121 after being in interference fit with the liquid injection hole 11, such a sealing manner will be used to punch the sealing rubber nail first, and then the two steps of welding the aluminum nail are combined into one step of welding the aluminum nail 12 with the rubber portion 13, thereby saving the steps, improving the working efficiency, simultaneously canceling the steps of pre-pressing and pre-spot welding, reducing the use of equipment, and saving the equipment cost.

As a further description of the above embodiment, the rubber part 13 is a cylindrical structure, an installation groove matching with the protrusion 122 is formed in the rubber part 13, and the rubber part 13 is sleeved on the protrusion 122 of the aluminum sealing nail 12 through the installation groove.

When this embodiment uses, rubber portion 13 is the cylinder for seting up the mounting groove, and the shape of mounting groove is the same with the shape of protruding portion 122, thereby the internal diameter of mounting groove equals the external diameter of protruding portion 122 make the mounting groove can with protruding portion 122 just cooperates, makes rubber portion 13 can overlap the protruding portion 122 of locating sealed aluminum nail 12 and play the effect of sealed glue nail. Meanwhile, the rubber part 13 has certain compression capacity, and the rubber part 13 can smoothly enter the installation groove to be connected with the rubber part 13.

As a further description of the above embodiment, the protruding portion 122 is a truncated cone, and the diameter of the protruding portion 122 gradually increases from one end connected to the welding portion 121 to the other end.

When the present embodiment is used, the protruding portion 122 is a truncated cone, and the diameter of the protruding portion 122 gradually increases from one end connected to the welding portion 121 to the other end, so that the protruding portion 122 and the rubber portion 13 can be tightly fitted without slipping.

In this embodiment, the shape of the protruding portion 122 is not limited to the truncated cone, and any other shape may be used to achieve close fitting between the protruding portion 122 and the rubber portion 13 without slipping. If the shape of the protrusion 122 is a trapezoid, the length of the trapezoid gradually increases from one end connected to the welding portion 121 to the other end. The shape of the mounting groove is the same as that of the protrusion 122, so that the two can be matched exactly.

As a further description of the above embodiment, the upper end of the welding part 121 is provided with a vertical part 1211.

In the present embodiment, the vertical portion 1211 is provided to prevent the formation of burrs during the molding of the welding portion 121.

As a further description of the above embodiment, the pour hole 11 includes a guide portion 111 and an engaging portion 112, and the guide portion 111 is located above the engaging portion 112.

When the sealing rubber nail with the rubber part 13 is used in the embodiment, the matching part 112 is in a cylindrical barrel shape, the matching part 112 is in a cone frustum shape, and the diameter of the guide part 111 is gradually increased from one end connected with the matching part 112 to the other end, so that the sealing rubber nail with the rubber part 13 can smoothly enter the matching part 112 through the guide part 111 to seal the liquid injection hole 11.

As a further description of the above embodiment, the guide portion 111 is chamfered, and an angle between a hypotenuse of the guide portion 111 and a horizontal straight line of the fitting portion 112 is α 1, 20 ° < α 1<80 °.

When the embodiment is used, the chamfering treatment of the guide part 111 has the function of guiding and supporting the sealing aluminum nail 12, and prevents the sealing aluminum nail 12 from entering the liquid injection hole 11 and continuing to move downwards to enter the battery core part to damage the battery while ensuring that the sealing aluminum nail 12 enters the liquid injection hole 11 for sealing.

As further described in the above embodiment, the rubber part 13 is in interference fit with the fitting part 112 of the liquid injection hole 11, and the one-sided interference is 50-150 um.

When the present embodiment is used, the interference fit connection between the rubber part 13 and the fitting part 112 of the injection hole 11 is simple, and the connection stability is high.

As a further description of the above embodiment, the shape of the welding portion 121 is the same as that of the guide portion 111 and the outer diameter of the welding portion 121 is smaller than the inner diameter of the guide portion 111.

In the present embodiment, the shape of the welding portion 121 is the same as that of the guiding portion 111, and the outer diameter of the welding portion 121 is smaller than the inner diameter of the guiding portion 111, so as to ensure that the welding portion 121 completely falls into the pour hole 11, and ensure the sealing effect of the welding portion 121 on the pour hole 11.

As a further description of the above embodiment, the lower end of the vertical portion 1211 at which the welding portion 121 is located is chamfered, and an included angle between the oblique side of the welding portion 121 and the horizontal direction of the protruding portion 122 is α 2, 20 ° < α 1<80 °, where α 2 < α 1.

In this embodiment, α 2 < α 1 ensures a certain gap between the guiding portion 111 and the welding portion 121, so as to ensure that the welding portion 121 can smoothly pass through the guiding portion 111 and enter the matching portion 112 to seal the pour hole 11.

The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a power battery seal structure, includes top cap (10), be equipped with on top cap (10) and run through notes liquid hole (11) of top cap (10), be equipped with sealed aluminium nail (12) in annotating liquid hole (11), sealed aluminium nail (12) with annotate liquid hole (11) interference fit, a serial communication port, sealed aluminium nail (12) are including weld portion (121), the below of weld portion (121) is equipped with protruding portion (122) of being connected with weld portion (121), protruding portion (122) overcoat is equipped with rubber portion (13), rubber portion (13) and notes liquid hole (11) interference fit.

2. The power battery sealing structure according to claim 1, wherein the rubber part (13) is a cylindrical structure, an installation groove matched with the protruding part (122) is formed in the rubber part (13), and the rubber part (13) is sleeved on the protruding part (122) of the sealing aluminum nail (12) through the installation groove.

3. A power cell sealing structure according to claim 1, wherein the upper end of the welding portion (121) is provided with a vertical portion (1211).

4. A power cell sealing structure according to claim 1, wherein the protruding portion (122) is a truncated cone, and the diameter of the protruding portion (122) gradually increases from one end connected to the welding portion (121) to the other end.

5. The power battery sealing structure according to claim 1, wherein the liquid injection hole (11) comprises a guide part (111) and a matching part (112), and the guide part (111) is positioned above the matching part (112).

6. The power battery sealing structure according to claim 5, wherein the guiding portion (111) is chamfered, and an included angle between a bevel edge of the guiding portion (111) and a horizontal straight line of the matching portion (112) is α 1.

7. The power battery sealing structure according to claim 5, wherein the rubber part (13) is in interference fit with the fitting part (112) of the liquid injection hole (11), and the single-side interference is 50-150 um.

8. A power cell sealing structure according to claim 5, characterized in that the shape of the welding portion (121) is the same as the guiding portion (111) and the outer diameter of the welding portion (121) is smaller than the inner diameter of the guiding portion (111).

9. The power cell sealing structure according to claim 6, wherein the lower end of the welding portion (121) is chamfered, and the included angle between the inclined edge of the welding portion (121) and the horizontal direction of the protrusion (122) is α 2, wherein α 2 < α 1.