CN220209118U

CN220209118U - Battery package wire hole seal structure

Info

Publication number: CN220209118U
Application number: CN202321431821.1U
Authority: CN
Inventors: 张宇平; 黄良取; 侯龙建; 宋华伟; 唐旋
Original assignee: Wuxi Power Battery Regeneration Technology Co ltd
Current assignee: Wuxi Power Battery Regeneration Technology Co ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-12-19
Anticipated expiration: 2033-06-06

Abstract

The utility model discloses a battery pack wire outlet sealing structure, which comprises a battery pack shell and a fixed sealing part; a wire outlet hole is formed in the battery pack shell, and one side of the wire outlet hole extends from the circumferential edge of the wire outlet hole to a direction away from the wire outlet hole to form a tubular connecting part; the fixing and sealing component comprises a heat shrinkage pipe, the heat shrinkage pipe is sleeved on the tubular connecting part, the wire harness passes through the heat shrinkage pipe and the tubular connecting part at the same time, and the heat shrinkage pipe can be contracted by heating the heat shrinkage pipe through the hot air gun so as to fix and seal the wire harness in the wire outlet hole. The utility model solves the technical problems that the gram head can not be used for sealing the wire outlet hole when the installation space is smaller and the cost is higher in the prior art.

Description

Battery package wire hole seal structure

Technical Field

The utility model relates to the technical field of battery pack sealing, in particular to a battery pack wire hole sealing structure.

Background

The new energy battery pack has higher requirements on dust prevention and water prevention, and the protection requirement often reaches over IP67, and the battery pack shell is required to be subjected to sealing treatment. Generally, the place where the battery pack housing has a gap to be sealed includes a joint of the upper and lower battery packs, a screw hole for locking, an explosion-proof valve, an output and input connector, and a wire hole. The part which is difficult to seal is the position of the wire outlet hole, the wire outlet hole is the wire harness which extends out of the opening of the battery package body shell as the name implies, and the wire harness is movable during installation and is of a soft structure, so that the sealing is not good.

At present, the sealing mode of the wire harness wire outlet hole of the main stream is to use a gram head, and the sealing mode has the effects of dust prevention, water prevention, stable wire harness fixing, safety and reliability. However, there are some situations where it is not suitable to use a glan head, for example, because the glan head is required to be screwed, when the installation space is small, the hand and the tool cannot be extended to operate, and thus cannot be installed; and the gram head has complicated structure and higher cost, so that the design of an additional sealing mode of the battery pack wire outlet is necessary.

Disclosure of Invention

The utility model provides a hole sealing structure for a battery pack, aiming at the defects in the prior art, so as to solve the technical problems that the prior art cannot seal a wire outlet hole by adopting a gram head when the installation space is smaller and the cost is higher.

The technical scheme adopted by the utility model for solving the technical purpose is as follows:

a battery pack wire outlet sealing structure comprises a battery pack shell, a wire outlet and a fixed sealing part; the wire outlet Kong Kaishe is arranged on the battery pack shell, and one side of the wire outlet hole extends from the circumferential edge of the wire outlet hole to a direction away from the wire outlet hole to form a cylindrical connecting part; the fixing and sealing component comprises a heat shrinkage pipe, the heat shrinkage pipe is sleeved on the tubular connecting part, a wire harness penetrates through the heat shrinkage pipe and the tubular connecting part, and the heat shrinkage pipe can be contracted by heating the heat shrinkage pipe through a hot air gun so as to fix and seal the wire harness in the wire outlet hole.

Preferably, the fixing seal member further includes an adhesive layer including a first adhesive layer and a second adhesive layer, the first adhesive layer being provided outside the tubular connection portion, and the second adhesive layer being provided outside the wire harness to be fixed.

Preferably, the width of the first adhesive layer is equal to or greater than half the length of the tubular connecting portion.

Preferably, the first adhesive layer and the second adhesive layer are coated on the inner wall of the heat shrinkage tube.

Preferably, the first adhesive layer is coated on an inner wall of one side of the heat shrinkage tube, which is in contact with the tubular connection part.

Preferably, the second adhesive layer is smeared on the inner wall of one side, which is contacted with the heat shrinkage tube and the wire harness, of the heat shrinkage tube.

Preferably, the first adhesive layer, the second adhesive layer and the heat shrinkage tube are of an integrated structure.

Preferably, the length of the tubular connection portion is 10mm or more.

Preferably, the tubular connection part and the battery pack housing are of an integrally formed structure.

Preferably, the tubular connection portion is welded to the battery pack case.

Compared with the prior art, the utility model has the beneficial effects that:

according to the sealing structure of the battery pack wire outlet hole, the tubular connecting part is arranged on one side of the wire outlet hole, the heat shrinkage pipe is used as the fixed sealing part, the heat shrinkage pipe is directly sleeved on the tubular connecting part during installation, then the wire harness passes through the heat shrinkage pipe and the tubular connecting part at the same time, the heat shrinkage pipe is heated through the heat gun, so that the heat shrinkage pipe is contracted, and the wire harness is fixed and sealed in the wire outlet hole. The scheme of the utility model can meet two basic requirements of fixing and sealing, only the heat shrinkage tube is assembled on the basis and blown by adopting a hot air gun, and the utility model does not need hands or tools to extend into the battery pack shell to screw the screw, does not need excessive operations, and has the advantage of convenient installation; and the heat shrinkage tube has lower cost and greatly reduces the cost.

Drawings

Fig. 1 is a schematic structural view of embodiment 1;

fig. 2 is a schematic structural diagram of embodiment 2.

Reference numerals in the drawings are as follows:

100-battery pack case;

200-wire outlet holes and 210-tubular connecting parts;

300-fixing sealing part, 310-heat shrinkage tube, 320-bonding layer, 321-first bonding layer, 322-second bonding layer.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In order to solve the technical problem that the conventional solution of sealing the gram head of the battery pack outlet Kong Caiyong cannot be installed in a narrow space, as shown in fig. 1, embodiment 1 of the present utility model provides a battery pack outlet sealing structure, which comprises a battery pack housing 100, an outlet 200 and a fixed sealing member 300, wherein the outlet 200 is formed on the battery pack housing 100, and one side of the outlet 200 extends from the circumferential edge of the outlet 200 to a direction away from the outlet 200 to form a tubular connection portion 210; the fixing seal member 300 includes a heat shrinkage tube 310. During installation, the heat shrinkage tube 310 is first sleeved on the tubular connection portion 210, then the wire harness passes through the heat shrinkage tube 310 and the tubular connection portion 210 at the same time, and finally the heat shrinkage tube 310 is heated by the heat gun, so that the heat shrinkage tube 310 is shrunk and the wire harness is fixed and sealed in the wire outlet hole 200. Compared with the prior art, the sealing scheme of the utility model does not need hands or tools to extend into the battery pack shell to screw the screws, does not need excessive operations, and has the obvious advantage of convenient installation.

In this embodiment, in order to achieve a better sealing function, the fixing seal member 300 further includes an adhesive layer 320. Since the sealing function of this structure requires sealing of two parts, namely, sealing between the heat shrink tube 310 and the tubular connection portion 210 and sealing between the heat shrink tube 310 and the wire harness, the adhesive layer 320 includes a first adhesive layer 321 disposed outside the tubular connection portion 210 and a second adhesive layer 322 disposed outside the wire harness where the wire harness is to be fixed.

Preferably, the width of the first adhesive layer 321 is equal to or greater than half the length of the tubular connecting portion 210.

Preferably, the first adhesive layer 321 and the second adhesive layer 322 are both formed by smearing structural adhesive, and the specific process is as follows when in installation:

1. a thin first adhesive layer 321 is smeared on the outer part of the tubular connecting part 210, and the heat shrinkage pipe 310 is sleeved on the tubular connecting part 210 coated with the first adhesive layer 321;

2. threading the wire harness into the heat shrinkage tube 310 and the tubular connection part 210 at the same time, and coating a second adhesive layer 322 on the position where the wire harness needs to be fixed;

3. and placing the wire harness and the heat shrinkage tube 310 at a proper position, heating the heat shrinkage tube 310 by using a hot air gun, and fixedly sealing the wire harness in the wire outlet hole 200 by shrinkage of the heat shrinkage tube 310, and completing assembly after the structural adhesive is solidified.

The above-described structure of embodiment 1 is that the wire harness is fixed to the wire outlet hole 200 by the heat shrinkage tube 310 and the adhesive layer 320, and is firm and reliable, and can withstand a certain external force to pull.

As shown in fig. 2, embodiment 2 of the present utility model also provides a battery pack outlet sealing structure having a structure substantially the same as that of embodiment 1, except that in this embodiment 2, the first adhesive layer 321 and the second adhesive layer 322 are both coated on the inner wall of the heat shrink tubing 310, specifically, the first adhesive layer 321 is coated on the inner wall of the heat shrink tubing 310 on the side contacting the tubular connection part 210, and the second adhesive layer 322 is coated on the inner wall of the heat shrink tubing 310 on the side contacting the wire harness; that is, the first adhesive layer 321, the second adhesive layer 322 and the heat shrinkable tube 310 are integrally formed, which is a product "heat shrinkable tube with adhesive" that is mature in the market, and the inner wall of the heat shrinkable tube is coated with a hot melt adhesive, so that the adhesive is hot melted to generate adhesion when heated, and the convenience and the sealing performance are excellent. The specific procedure of this example 2 at the time of installation is as follows:

1. sleeving the glued heat-shrinkable tube 310 on the tubular connecting part 210;

2. threading the wire harness into the heat shrinkage tube 310 and the tubular connection portion 210 at the same time;

3. after the wire harness and the tubular connection part 210 are put in place, the heat shrinkage tube 310 is heated by using a hot air gun, the heat shrinkage tube 310 is shrunk to fixedly seal the wire harness in the wire outlet hole 200, and after the structural adhesive is solidified, the assembly is completed.

Compared with the prior art adopting the gram head for sealing, the technical schemes of the embodiments 1 and 2 of the utility model have the advantages that the heat-shrinkable tube 310 has low cost, the material cost only needs a small section of the heat-shrinkable tube 310 and a little structural adhesive, or the material cost only needs the cost of the heat-shrinkable tube with adhesive, and the material cost is almost negligible; the scheme of the utility model is fast to assemble, does not occupy space, only needs to sleeve the heat shrinkage tube 310 on the tubular connecting part 210 in advance and finally heat-shrink, has few operation steps and short time, does not need hands or tools to extend into the battery pack shell 100, greatly improves the assembly efficiency of the production line, and reduces the assembly cost of the production line.

It should be noted that, the positions of the wire outlet holes 200 on the battery pack case 100 are flexibly designed according to the wire outlet positions required by the product design; the length of the tubular connection portion 210 cannot be too short, if the area of the heat-shrinkable tube 310 attached to the surface of the wire hole 200 after heat shrinkage is too small, the heat-shrinkable tube is liable to fall off, but the length of the tubular connection portion 210 is not a fixed value, the larger the diameter of the wire hole 200 or the heat-shrinkable tube 310 is, the longer the length of the tubular connection portion 210 is, the specific value can be obtained according to a drawing test (drawing determination mode: the heat-shrinkable tube 310 is heat-shrunk on the tubular connection portion 210, and still does not fall off from the tubular connection portion 210 when the heat-shrinkable tube is stretched and white to generate cracks, namely, the length of the tubular connection portion 210 is determined to meet the requirement), so that the length of the tubular connection portion 210 is more than or equal to 10mm in terms of the wire diameter 14AWG and the 16AWG wire harness which are the most used by our current products.

The tubular connection portion 210 may be integrally formed with the battery pack case 100, the tubular connection portion 210 may be welded to the battery pack case 100, and the tubular connection portion 210 may be formed by punching a sprouting hole.

The above-described embodiments of the present utility model do not limit the scope of the present utility model. Any of various other corresponding changes and modifications made according to the technical idea of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. The battery pack wire outlet sealing structure is characterized by comprising a battery pack shell and a fixed sealing part;

a wire outlet hole is formed in the battery pack shell, and one side of the wire outlet hole extends from the circumferential edge of the wire outlet hole to a direction away from the wire outlet hole to form a tubular connecting part;

the fixing and sealing component comprises a heat shrinkage pipe, the heat shrinkage pipe is sleeved on the tubular connecting part, the wire harness passes through the heat shrinkage pipe and the tubular connecting part at the same time, and the heat shrinkage pipe can be contracted by heating the heat shrinkage pipe through the hot air gun so as to fix and seal the wire harness in the wire outlet hole.

2. The battery pack outlet hole sealing structure according to claim 1, wherein the fixing sealing member further comprises an adhesive layer including a first adhesive layer provided outside the tubular connection portion and a second adhesive layer provided outside the wire harness to be fixed.

3. The battery pack outlet hole sealing structure according to claim 2, wherein the width of the first adhesive layer is equal to or greater than half the length of the tubular connecting portion.

4. The battery pack outlet hole sealing structure according to claim 2, wherein the first adhesive layer and the second adhesive layer are coated on the inner wall of the heat shrinkage tube.

5. The battery pack outlet hole sealing structure according to claim 4, wherein the first adhesive layer is applied to an inner wall of a side of the heat shrinkage tube in contact with the tubular connection portion.

6. The battery pack outlet hole sealing structure according to claim 5, wherein the second adhesive layer is coated on an inner wall of a side of the heat shrinkage tube in contact with the wire harness.

7. The battery pack outlet hole sealing structure according to claim 6, wherein the first adhesive layer, the second adhesive layer and the heat shrinkage tube are integrally formed.

8. The battery pack outlet hole sealing structure according to any one of claims 1 to 7, wherein the length of the tubular connection portion is 10mm or more.

9. The battery pack outlet hole sealing structure according to claim 8, wherein the cylindrical connecting portion and the battery pack case are integrally formed.

10. The battery pack outlet hole sealing structure according to claim 8, wherein the tubular connection portion is welded to the battery pack case.