CN215578823U

CN215578823U - Sealed battery box and battery

Info

Publication number: CN215578823U
Application number: CN202121002900.1U
Authority: CN
Inventors: 叶斌; 张国祥
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-01-18
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a sealed battery box and a battery, wherein the sealed battery box comprises an upper box body, a lower box body and a sealing element, wherein the upper box body is provided with a first sealing part, and the first sealing part is provided with a first sealing hole for a bolt to pass through; the lower box body is provided with a second sealing part, a second sealing hole is formed in the second sealing part, the second sealing hole and the first sealing hole are coaxially arranged, the second sealing part is also provided with a limiting boss extending towards the upper box body, and the limiting boss is used for abutting against the first sealing part; the seal is disposed between the first seal portion and the second seal portion in a compressed state. According to the sealed battery box, the limiting boss extending towards the upper box body is arranged on the lower box body, so that the limiting boss is abutted against the upper box body in the process of folding the upper box body and the lower box body, the compression range of the sealing element is limited, sealing failure is prevented on the premise of ensuring the sealing effect of the sealing element, the production process is simple, the production speed is high, and the assembly precision is high.

Description

Sealed battery box and battery

Technical Field

The utility model relates to the field of battery structure design, in particular to a sealed battery box and a battery.

Background

Because the problems of non-renewable petroleum energy and environmental pollution are more and more valued by governments of various countries, new energy automobiles are greatly popularized in the global scope in recent years, and the proportion of new energy automobiles in the automobile market is increased day by day. With the increase of the market share of new energy vehicles, the manufacturing cost and safety performance of corresponding core components such as batteries are also the focus of attention of manufacturers of various large vehicles.

The existing battery generally comprises an upper box body, a lower box body, a rivet nut, a bolt and a sealing gasket, wherein the sealing gasket is arranged between the upper box body and the lower box body, a hole for the rivet nut to pass through is formed in the lower box body, the compression amount of the sealing gasket reaches a preset value, the boss part of the rivet nut needs to be exposed on the upper surface of the lower box body, so that when the upper box body and the lower box body are folded, the boss part of the rivet nut can be firstly directly abutted against the upper box body, therefore, the sealing gasket can be compressed to a preset compression range by the upper box body and the lower box body, and the bolt arranged on the upper box body passes through a position avoiding hole of the sealing gasket and is connected with the rivet nut.

However, the rivet nut adopted in the prior art is used as a connecting piece, and has the following disadvantages: the rivet nut is installed and need fill in the downthehole of box under with rivet nut earlier on the box under, adopts the rivet process again to make the rivet nut fix under on the box, and the production beat is slow, the cost of labor is high, moreover inefficacy easily. In addition, the rivet nut is arranged on the lower box body and needs to be subjected to two procedures of box body hole opening and rivet, two tolerance accumulations exist, the size precision is low, and the assembly precision of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides the sealed battery box and the battery, which have the advantages of simple production process, high production speed and high assembly precision.

The purpose of the utility model is realized by the following technical scheme:

a sealed battery box comprises an upper box body, a lower box body and a sealing element, wherein a first sealing part is arranged on the upper box body, and a first sealing hole for a bolt to pass through is formed in the first sealing part;

the lower box body is provided with a second sealing part, the second sealing part is opposite to the first sealing part, a second sealing hole is formed in the second sealing part, the second sealing hole and the first sealing hole are coaxially arranged, a limiting boss extending towards the upper box body is further arranged on the second sealing part in a protruding mode, and the limiting boss is used for being abutted to the first sealing part;

the seal is disposed in a compressed state between the first seal portion and the second seal portion.

In one embodiment, the first sealing portion is arranged around the periphery of the upper box body, the second sealing portion is arranged around the periphery of the lower box body, the sealing elements are connected end to form a closed loop, one surface of each sealing element is abutted with the first sealing portion, and the other surface of each sealing element is abutted with the second sealing portion.

In one embodiment, the first sealing holes are provided in plurality, and the first sealing holes are arranged on the first sealing portion at intervals, the second sealing holes are provided in plurality, and the second sealing holes and the first sealing holes are arranged on the second sealing portion in a one-to-one correspondence manner.

In one embodiment, the sealing element is provided with a clearance hole, the clearance hole and the second sealing hole are arranged on the same center line, and the clearance hole is used for a bolt to pass through.

In one embodiment, the limiting boss is integrally formed with the lower box body.

In one embodiment, an internal thread or a wire thread insert is arranged in the second sealing hole.

In one embodiment, the seal is a silicone piece.

In one embodiment, the second sealing part is provided with an extension boss protruding away from the first sealing part, and the extension boss extends along the axis of the second sealing hole.

In one embodiment, the second sealing portion further has a rib disposed on an outer surface of the extension boss.

A battery comprising the sealed battery case of any one of the above.

Compared with the prior art, the utility model has at least the following advantages:

1. according to the sealed battery box, the upper box body, the lower box body and the sealing element are arranged, and the limiting boss extending towards the upper box body is arranged on the lower box body, so that the limiting boss is abutted against the upper box body in the process of folding the upper box body and the lower box body, the compression range of the sealing element is limited, sealing failure is prevented on the premise of ensuring the sealing effect of the sealing element, the production process is simple, the production speed is high, and the assembly precision is high.

2. In one embodiment, the extension boss is arranged on the second sealing part of the lower box body, so that the thread meshing part of the bolt on the lower box body is extended, the connection strength between the upper box body and the lower box body is increased, and the sealing performance and the structural strength of the sealed battery box are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded view of a sealed battery case according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a sealed battery case according to an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure of a sealed battery box according to an embodiment of the present invention;

fig. 4 is another schematic structural diagram of a sealed battery box according to an embodiment of the present invention.

Description of reference numerals:

sealing the battery case 10; an upper case 100; a first seal portion 110; a first seal hole 111; a lower case 200; a second seal portion 210; a second seal hole 211; a limit boss 212; an extension boss 213; reinforcing ribs 214; a sealing member 300; and an escape aperture 310.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The existing battery generally comprises an external box body and an internal battery core, and in order to protect the internal battery core from water entering and short circuit, sealing measures are often required to be made on the box body, wherein the most common method is to adopt a sealing ring sealing mode, and a sealing ring is placed between an upper box body and a lower box body and is connected with the upper box body and the lower box body so as to extrude the sealing ring.

The compression amount of sealing washer has predetermined scope, and prior art often sets up bolt or other fasteners on last box, trompil on the corresponding position of box down simultaneously to place the blind rivet nut in the downthehole, make the boss part of blind rivet nut expose in the upper surface of box down, the height of blind rivet nut boss part is less than the thickness of sealing washer moreover. When the bolt of the upper box body is in threaded connection with the rivet nut of the lower box body, the sealing ring is continuously compressed along with the screwing of the bolt until the upper box body is in rigid butt joint with the boss part of the rivet nut, the sealing ring reaches a preset compression amount at the moment, the compression amount of the sealing ring is determined by the height of the boss of the rivet nut, and the sealing performance of the battery box body can be adjusted by adjusting the height of the boss of the rivet nut.

However, the prior art generally uses the projection of the blind rivet nut to abut against the upper box body to limit the compression of the gasket, which has some disadvantages, such as: the rivet nut is small in effective sealing width with the sealing ring, the seal failure of the battery box body can be caused due to the fact that rivet is not in place, the rivet nut needs to be additionally provided with one rivet process, the production rhythm is slow, labor cost is high, the rivet nut needs to pass through two processes of box body opening and rivet, two tolerance accumulation exists, the size precision is low, the box body assembling precision can be reduced, and the problem of poor sealing is further caused.

To solve the above problems, the present invention provides a sealed battery case 10.

Referring to fig. 1, 2, 3 and 4, a sealed battery box 10 includes an upper box 100, a lower box 200 and a sealing member 300, wherein the upper box 100 is provided with a first sealing portion 110, and the first sealing portion 110 is provided with a first sealing hole 111 for a bolt to pass through;

a second sealing part 210 is arranged on the lower box body 200, the second sealing part 210 is arranged opposite to the first sealing part 110, a second sealing hole 211 is arranged on the second sealing part 210, the second sealing hole 211 and the first sealing hole 111 are coaxially arranged, a limiting boss 212 extending towards the upper box body 100 is further arranged on the second sealing part 210 in a protruding mode, and the limiting boss 212 is used for being abutted to the first sealing part 110;

the seal 300 is disposed between the first sealing portion 110 and the second sealing portion 210 in a compressed state.

It should be noted that, both the upper case 100 and the lower case 200 may be provided with an inwardly recessed cavity for accommodating a battery, the first sealing portion 110 provided on the upper case 100 may be a flange on the outer periphery of the upper case 100, the first sealing portion 110 is provided with a first sealing hole 111 for a bolt to pass through, the lower case 200 is provided with a second sealing portion 210, the second sealing portion 210 may be a flange provided on the outer periphery of the lower case 200, the second sealing portion 210 is opposite to the first sealing portion 110, the second sealing portion 210 is further provided with a protruding limiting boss 212 extending in a direction close to the upper case 100, the limiting boss 212 may annularly surround the second sealing hole 211, the limiting boss 212 may also be provided at any position on one side of the second sealing portion 210 close to the upper case 100, as long as the limiting boss 212 may abut against the first sealing portion 110 of the upper case 100, the sealing element 300 may be a silicone element or a rubber element, etc., the sealing element 300 can be adhered to the second sealing portion 210 by glue, the sealing element 300 can be provided with a clearance hole 310 for the limiting boss 212 to pass through, and the sealing element 300 can also be positioned on one side of the limiting boss 212, when the sealing element 300 is in a natural state, the thickness of the sealing element 300 is greater than the height of the limiting boss 212, that is, in the process that the upper box body 100 and the lower box body 200 are mutually folded and the sealing element 300 is extruded, the sealing element 300 is extruded and compressed, when the sealing element 300 is compressed to a preset compression amount, the first sealing portion 110 is abutted to the limiting boss 212, so that the upper box body 100 and the lower box body 200 cannot be continuously close to each other, and therefore the compression amount of the sealing element 300 is ensured to be neither too large nor too small. Finally, bolts sequentially penetrate through the first sealing hole 111 and the second sealing hole 211 from top to bottom, and then nuts or threads arranged on the inner wall of the second sealing hole 211 are used for fixedly connecting the upper box body 100 and the lower box body 200.

Referring to fig. 1 and 2, in one embodiment, the first sealing portion 110 is disposed around the outer periphery of the upper case 100, the second sealing portion 210 is disposed around the outer periphery of the lower case 200, the sealing members 300 are connected end to form a closed loop, one surface of the sealing member 300 abuts against the first sealing portion 110, and the other surface of the sealing member 300 abuts against the second sealing portion 210.

It should be noted that the first sealing portion 110 may be a flange disposed on the outer side of the upper case 100, the second sealing portion 210 may be a flange disposed on the outer side of the lower case 200, and the first sealing portion 110 and the second sealing portion 210 are adapted, and the sealing member 300 is disposed between the first sealing portion 110 and the second sealing portion 210, when the upper case 100 and the lower case 200 are folded, the sealing member 300 is compressed, and the sealing member 300 connected end to end separates the inside and the outside of the sealed battery case 10, thereby achieving a sealing effect.

Referring to fig. 1 and 2, in one embodiment, a plurality of first sealing holes 111 are disposed, the plurality of first sealing holes 111 are disposed on the first sealing portion 110 at intervals, a plurality of second sealing holes 211 are disposed, and the plurality of second sealing holes 211 and the plurality of first sealing holes 111 are disposed on the second sealing portion 210 in a one-to-one correspondence manner.

It should be noted that, the plurality of first sealing holes 111 are provided at intervals in the first sealing portion 110, and the plurality of second sealing holes 211 are provided at corresponding positions in the second sealing portion 210, so that the upper case 100 and the lower case 200 can be fixed by using a plurality of bolts at the same time, thereby improving structural strength and connection stability.

Referring to fig. 2, in one embodiment, the sealing element 300 is provided with an avoiding hole 310, the avoiding hole 310 and the second sealing hole 211 are arranged on the same center line, and the avoiding hole 310 is used for a bolt to pass through.

It should be noted that, in this embodiment, the bolts sequentially pass through the first sealing hole 111, the avoiding hole 310 and the second sealing hole 211 from top to bottom, so that the connection is stable, the position of the sealing member 300 is limited by the bolts and is not easy to move, and the sealing performance of the sealed battery box 10 is improved.

In one embodiment, the stop boss 212 is integrally formed with the lower case 200.

It should be noted that the limiting boss 212 may be integrally cast with the lower case 200, so as to improve the production efficiency of the sealed battery box 10 and save the production cost.

In one embodiment, an internal thread or wire thread insert is disposed within the second sealing bore 211.

It should be noted that, an internal thread may be disposed in the second sealing hole 211, so that the production cost is low, and a wire thread insert may also be disposed, so that the connection strength is higher.

In one embodiment, the seal 300 is a silicone piece.

Referring to fig. 2, 3 and 4, in one embodiment, the second sealing portion 210 is provided with an extension boss 213 protruding in a direction away from the first sealing portion 110, and the extension boss 213 extends along an axis of the second sealing hole 211.

It should be noted that, in order to make the length of the engagement portion between the bolt and the second sealing portion 210 longer, in this embodiment, an extension boss 213 enveloping the axis of the second sealing hole 211 is further provided, so that the bolt can be inserted into the extension boss 213, and the engagement length between the bolt and the second sealing hole 211 is extended, thereby improving the connection stability between the upper box 100 and the lower box 200.

Referring to fig. 3, in one embodiment, the second sealing portion 210 further includes a rib 214, and the rib 214 is disposed on an outer surface of the extension boss 213.

In order to improve the structural strength of the extension boss 213, a rib 214 is further provided on the outer surface of the extension boss 213.

A battery comprising the sealed battery case 10 of any one of the above.

It should be noted that, the battery includes any one of the sealed battery box 10 described above and the battery cell, and the battery cell is placed inside the sealed battery box 10, and the battery cell is protected by using the good sealing performance of the sealed battery box 10, so as to prevent the short circuit of the battery cell.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A sealed battery case, comprising:

the bolt sealing device comprises an upper box body, a first sealing part and a second sealing part, wherein the upper box body is provided with a first sealing part, and the first sealing part is provided with a first sealing hole for a bolt to pass through;

the lower box body is provided with a second sealing part, the second sealing part is arranged opposite to the first sealing part, a second sealing hole is formed in the second sealing part, the second sealing hole and the first sealing hole are coaxially arranged, a limiting boss extending towards the upper box body is further arranged on the second sealing part in a protruding mode, and the limiting boss is used for being abutted to the first sealing part;

a seal disposed in a compressed state between the first seal portion and the second seal portion.

2. The sealed battery box of claim 1, wherein the first sealing portion is circumferentially disposed around an outer periphery of the upper box, the second sealing portion is circumferentially disposed around an outer periphery of the lower box, the sealing member is connected end to form a closed loop, and one face of the sealing member abuts against the first sealing portion and the other face of the sealing member abuts against the second sealing portion.

3. The sealed battery box according to claim 2, wherein the first sealing hole is provided in plurality, and a plurality of the first sealing holes are provided at intervals on the first sealing portion, and a plurality of the second sealing holes are provided in plurality, and a plurality of the second sealing holes and a plurality of the first sealing holes are provided in the second sealing portion in one-to-one correspondence.

4. The sealed battery box of claim 1 or 2, wherein the sealing element is provided with a clearance hole, the clearance hole and the second sealing hole are arranged on the same center line, and the clearance hole is used for a bolt to pass through.

5. The sealed battery box of claim 1, wherein the limiting boss is integrally formed with the lower case body.

6. The sealed battery box according to claim 1 or 5, wherein an internal thread or a wire thread insert is provided in the second sealing hole.

7. The sealed battery compartment of claim 1, wherein the seal is a silicone.

8. The sealed battery case of claim 1, wherein the second sealing portion is provided with an extension boss protruding away from the first sealing portion, and the extension boss extends along an axis of the second sealing hole.

9. The sealed battery case of claim 8, wherein the second sealing portion is further provided with a reinforcing rib disposed on an outer surface of the extension boss.

10. A battery comprising the sealed battery case of any one of claims 1 to 9.