CN209786022U

CN209786022U - Box body sealing structure of lithium battery pack

Info

Publication number: CN209786022U
Application number: CN201920748055.9U
Authority: CN
Inventors: 张剑; 丁希罕; 陈洋波; 邵先辉
Original assignee: HANGZHOU SKYRICH POWER Co Ltd
Current assignee: HANGZHOU SKYRICH POWER Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2019-12-13
Anticipated expiration: 2029-05-23

Abstract

The utility model relates to a lithium cell group box seal structure belongs to the lithium cell field, to the problem that the sealed effect of current box is not good, adopts technical scheme as follows: the utility model provides a box seal structure of lithium cell group, is located the sealing washer between case lid and the box including the box that is used for bearing lithium cell group, the case lid of lid on the box to and two at least fasteners that are used for fastening case lid and box, the lateral wall on box upper portion is concave after the punching press and is formed heavy platform, the sealing washer tight-fitting is between heavy platform and case lid, the fastener is located heavy platform below. The sealing washer tight-fitting has guaranteed to have better sealed between case lid and the box between heavy platform and the case lid, and the fastener setting ensures that the sealing washer can not deviate from in heavy platform below, has further guaranteed the leakproofness between case lid and the box, effectively prevents rainwater, mud or dust and lithium cell group contact, avoids lithium cell group short circuit or damage.

Description

Box body sealing structure of lithium battery pack

Technical Field

the utility model belongs to the lithium cell field, in particular to box seal structure of lithium cell group.

Background

At present, electric bicycles running on the market generally adopt lead-acid battery packs, and the lead-acid battery packs can cause serious pollution to the environment easily. The state advocates now and uses lithium cell group, and lithium cell group generally adopts the panel beating box, and the panel beating box mainly comprises box and last case lid down. The lithium battery pack has strict requirements on the use environment, and if rainwater, dust or slurry enters the lithium battery pack, short circuit or damage in the lithium battery pack can be caused. Electric bicycle is restricted to self volume and weight reason, generally can not set up the solitary sealed storehouse body for lithium cell group, and this sealing performance who just requires lithium cell group self is good. Therefore, it is necessary to provide a sealing structure of a lithium battery pack box.

SUMMERY OF THE UTILITY MODEL

To the problem of prior art, the utility model mainly aims at providing a box seal structure of lithium cell group, this seal structure can obviously promote the sealing performance of lithium cell group box, prevents that rainwater, mud or dust from getting into lithium cell group.

The utility model adopts the technical scheme as follows: the utility model provides a box seal structure of lithium cell group, is located the sealing washer between case lid and the box including the box that is used for bearing lithium cell group, the case lid of lid on the box to and two at least fasteners that are used for fastening case lid and box, the lateral wall on box upper portion is concave after the punching press and is formed heavy platform, the sealing washer tight-fitting is between heavy platform and case lid, the fastener is located heavy platform below.

The sealing washer tight-fitting has guaranteed to have better sealed between case lid and the box between heavy platform and the case lid, and the fastener setting ensures that the sealing washer can not deviate from in heavy platform below, has further guaranteed the leakproofness between case lid and the box, effectively prevents rainwater, mud or dust and lithium cell group contact, avoids lithium cell group short circuit or damage.

Furthermore, the peripheral edge of the box cover extends downwards until the box cover covers the outer side of the box body, the sealing ring and the sinking platform are enclosed, the fastening pieces are fastening screws and fastening nuts which are used in a matched mode, and the fastening screws are riveted and pressed on the peripheral edge of the box cover and the side wall of the box body in an interference mode and matched with the corresponding fastening nuts to finish fastening the box cover and the box body. In this setting, fastening screw and case lid and box interference riveting have reduced the installation degree of difficulty to further guarantee the tight-fitting effect of sealing washer and box, case lid, in order to ensure good leakproofness.

Further, the cross-section of sealing washer is the shape of falling the U, encloses on the lateral wall and the roof of the inside and outside both sides of heavy platform, the thickness of sealing washer lateral wall is more than or equal to the case lid inside wall and sinks the distance between the platform lateral wall to guarantee the tight fit between sealing washer and box and the case lid, guarantee good sealed effect.

Further, the sealing ring is an elastic part, preferably an ethylene propylene diene monomer rubber part. The elastic sealing ring reduces the abrasion to the box cover when the box cover is installed, the tight fit between the box body and the box cover is ensured, the sealing ring made of ethylene propylene diene monomer rubber is not easy to damage, and the service life is longer.

During installation, the sealing gasket is installed on the sinking platform, the box body covers the box body and the outer side of the sinking platform, a heavy object is placed on the box cover, the sealing ring is compressed by 30% -50%, then the fastening screw and the fastening nut are installed, after the heavy object is removed, the sealing ring rebounds, the gap between the box body and the box cover is filled, and a good sealing effect is achieved.

The utility model discloses beneficial effect who has: the sealing washer tight-fitting has guaranteed to have better sealed between case lid and the box between heavy platform and the case lid, and the fastener setting ensures that the sealing washer can not deviate from in heavy platform below, has further guaranteed the leakproofness between case lid and the box, effectively prevents rainwater, mud or dust and lithium cell group contact, avoids lithium cell group short circuit or damage.

Drawings

FIG. 1 is a schematic cross-sectional view;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the seal ring;

In the figure: 1-a box body; 2-box cover; 3-sealing ring; 4-fastening a nut; 5-fastening screws; 6-weight.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

The lithium battery pack box sealing structure of the embodiment is shown in fig. 1 to 3, and comprises a box body 1 for bearing a lithium battery pack, a box cover 2 covered on the box body 1, a sealing ring 3 positioned between the box cover 2 and the box body 1, and at least two fasteners for fastening the box cover 2 and the box body 1, wherein the side wall of the upper part of the box body 1 is inwards concave after being punched to form a sinking platform, the sealing ring 3 is tightly matched between the sinking platform and the box cover 2, and the fasteners are positioned below the sinking platform.

Sealing washer 3 tight-fitting has guaranteed to have better sealed between case lid 2 and the box 1 between sinking platform and the case lid 2, and the fastener setting is in sinking platform below, ensures that sealing washer 3 can not deviate from, has further guaranteed the leakproofness between case lid 2 and the box 1, effectively prevents rainwater, mud or dust and lithium cell group contact, avoids lithium cell group short circuit or damage.

the peripheral edge of the box cover 2 extends downwards until covering the outer side of the box body 1 to surround the sealing ring 3 and the sinking platform, the fastening pieces are fastening screws 5 and fastening nuts 4 which are used in a matched mode, and the fastening screws 5 are riveted on the peripheral edge of the box cover 2 and the side wall of the box body 1 in an interference mode and matched with the corresponding fastening nuts 4 to finish fastening the box cover 2 and the box body 1. In this setting, fastening screw 5 and case lid 2 and 1 interference riveting of box have reduced the installation degree of difficulty to further guarantee sealing washer 3 and box 1, case lid 2's tight-fitting effect, in order to ensure good leakproofness.

The cross-section of sealing washer 3 is for falling the U-shaped, encloses on the lateral wall and the roof of the inside and outside both sides of sinking the platform, the thickness of 3 lateral walls of sealing washer is more than or equal to 2 inside walls of case lid and sinks the distance between the platform lateral wall to guarantee that sealing washer 3 and box 1 and 2 between the tight fit, guarantee good sealed effect.

The sealing ring 3 is an elastic part, preferably an ethylene propylene diene monomer rubber part. The elastic sealing ring 3 reduces the abrasion to the box cover 2 when the box cover 2 is installed, the tight fit between the box body 1 and the box cover 2 is ensured, the sealing ring 3 made of ethylene propylene diene monomer is not easy to damage, and the service life is longer.

During installation, the sealing gasket is installed on the sinking platform, the box body 1 covers the box body 1 and the outer side of the sinking platform, the weight 6 is placed on the box cover 2, the sealing ring 3 is compressed by 30% -50%, then the fastening screw 5 and the fastening nut 4 are installed, after the weight 6 is removed, the sealing ring 3 rebounds, the gap between the box body 1 and the box cover 2 is filled, and a good sealing effect is achieved.

the above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a box seal structure of lithium cell group, its characterized in that, is located the sealing washer between case lid and the box including the box that is used for bearing lithium cell group, the case lid of lid on the box to and two at least fasteners that are used for fastening case lid and box, the lateral wall on box upper portion is concave after the punching press and is formed heavy platform, the sealing washer tight fit is between heavy platform and case lid, the fastener is located heavy platform below.

2. The lithium battery pack box sealing structure according to claim 1, wherein the peripheral edge of the box cover extends downwards until covering the outer side of the box body to surround the sealing ring and the sinking platform, the fastening members are fastening screws and fastening nuts which are used in a matched mode, and the fastening screws are riveted on the peripheral edge of the box cover and the side wall of the box body in an interference mode and matched with the corresponding fastening nuts to finish fastening the box cover and the box body.

3. The lithium battery pack box sealing structure according to claim 1 or 2, wherein the sealing ring has an inverted U-shaped cross section and surrounds the inner and outer sidewalls and the top wall of the sink, and the thickness of the outer sidewall of the sealing ring is greater than or equal to the distance between the inner sidewall of the box cover and the outer sidewall of the sink.

4. The lithium battery pack box sealing structure of claim 3, wherein the sealing ring is an elastic member.

5. The lithium battery pack box sealing structure according to claim 4, wherein the sealing ring is an ethylene propylene diene monomer rubber.