CN214625261U

CN214625261U - Power battery box body with sealing structure

Info

Publication number: CN214625261U
Application number: CN202120766071.8U
Authority: CN
Inventors: 刘威
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-05
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a seal structure power battery box, include: the lower box body is hollow, and a groove is formed in the top of the lower box body; the bottom of the upper box body is provided with a lug which is matched with the groove; the sealing ring is placed at the top of the lower box body; and the fastener is used for fixedly connecting the lower box body and the upper box body, and the fastener driving lug is close to the inner surface of the bottom of the groove so as to press the sealing ring. The utility model discloses in, be close to the bottom internal surface of recess through fastener drive lug with the extrusion seal circle to box, last box, sealing washer form a sealed overall structure down in the messenger, under lug and recess cooperation, only need lug and recess to laminate mutually when fastening at every turn, guaranteed to exert the power on the sealing washer at every turn unchangeable, also can not appear the too big or undersize condition of dynamics.

Description

Power battery box body with sealing structure

Technical Field

The utility model relates to a sealed technical field especially relates to a seal structure power battery box.

Background

At present, the box seal structure of power battery includes: the box cover, the box body and the sealing ring (placed between the box cover and the box body) are connected with the box cover and the box body through bolts in a locking mode, and the bolts compress the sealing ring in the locking process to achieve the sealing function of the box body sealing structure. When the sealing ring is compressed, if the compression amount is too small, the sealing effect is not good, and if the compression amount is too large, the sealing failure is easily caused.

In order to solve the problems, in the prior art, a limit part gasket is often added in a box sealing structure, and the compression amount of a sealing ring is controlled through the gasket.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a seal structure power battery box is provided to it compresses tightly the improper problem of sealing washer dynamics in the current seal structure power battery box to solve.

The utility model discloses a following technical means realizes solving above-mentioned technical problem:

a sealed power cell housing, comprising:

the lower box body is hollow, and a groove is formed in the top of the lower box body;

the bottom of the upper box body is provided with a lug which is matched with the groove;

the sealing ring is placed at the top of the lower box body;

and the fastener is used for fixedly connecting the lower box body and the upper box body, and the fastener driving lug is close to the inner surface of the bottom of the groove so as to press the sealing ring.

The lug is driven by the fastener to be close to the inner surface of the bottom of the groove so as to extrude the sealing ring, so that the lower box body, the upper box body and the sealing ring form a sealed integral structure, and the lug and the groove are matched, so that the lug and the groove are only required to be attached to each other when being fastened at each time, the force exerted on the sealing ring at each time is unchanged, and the situation of overlarge or undersize force can not occur.

As a further aspect of the present invention: and a lower sealing surface and a threaded hole extend outwards from the top of the peripheral side wall of the lower box body.

As a further aspect of the present invention: and the matched surface of the upper box body and the lower box body extends outwards to form an upper sealing surface.

As a further aspect of the present invention: the top of the lower box body is provided with a groove, and the peripheral side wall of the upper box body is fixedly provided with an integrated lug.

As a further aspect of the present invention: the fastener is a fastening bolt, a plurality of first threaded holes are uniformly formed in the peripheral side of the lower sealing surface, a plurality of second threaded holes corresponding to the first threaded holes are formed in the upper sealing surface, a plurality of third threaded holes corresponding to the threaded holes are formed in the sealing ring, and the fastener is screwed into the first threaded holes, the second threaded holes and the third threaded holes in sequence to fix the lower box body and the upper box body.

As a further aspect of the present invention: the box body is characterized by further comprising an I-shaped steel, wherein a fourth threaded hole used for fastening the lower box body and the upper box body is formed in the I-shaped steel.

As a further aspect of the present invention: the device also comprises concave steel formed by welding a vertical plate and two transverse plates, threaded holes are formed in the two transverse plates, and the device can be fixed through external nuts.

As a further aspect of the present invention: the thickness of the tab is the same as the width of the groove.

As a further aspect of the present invention: the width of the lower sealing surface of the lower box body is larger than that of the sealing gasket; the width of the upper sealing surface of the upper cover plate is larger than that of the sealing ring; the upper cover plate and the lower box body are formed through metal plates.

The utility model has the advantages that:

1. the utility model discloses in, be close to the bottom internal surface of recess through fastener drive lug with the extrusion seal circle to box, last box, sealing washer form a sealed overall structure down in the messenger, under lug and recess cooperation, only need lug and recess to laminate mutually when fastening at every turn, guaranteed to exert the power on the sealing washer at every turn unchangeable, also can not appear the too big or undersize condition of dynamics.

Drawings

Fig. 1 is a front view of a power battery box with a sealing structure according to an embodiment of the present invention.

Fig. 2 is a perspective view of a power battery box with a sealing structure provided by an embodiment of the present invention.

Fig. 3 is a schematic diagram of a lower box body in a power battery box body with a sealed structure provided by an embodiment of the present invention.

Fig. 4 is a top view of the lower box body in the power battery box body with a sealed structure provided by the embodiment of the present invention.

Fig. 5 is a schematic diagram of an upper cover plate in a power battery box with a sealed structure according to an embodiment of the present invention.

Fig. 6 is a top view of an upper cover plate in a power battery box with a sealing structure according to an embodiment of the present invention.

In the figure, 1, a lower box body, 11, a lower sealing surface, 12, a first threaded hole, 13 and a groove; 2. an upper box body; 21. an upper sealing surface; 22. a second threaded hole, 23, a tab; 3. and (5) sealing rings.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, fig. 1 is a front view of a power battery box with a sealed structure provided in an embodiment of the present invention, fig. 2 is a perspective view of a power battery box with a sealed structure provided in an embodiment of the present invention, fig. 3 is a schematic view of a lower box in a power battery box with a sealed structure provided in an embodiment of the present invention, fig. 4 is a top view of a lower box in a power battery box with a sealed structure provided in an embodiment of the present invention, and fig. 5 is a schematic view of an upper cover plate in a power battery box with a sealed structure provided in an embodiment of the present invention; a sealed power cell housing, comprising:

the device comprises a lower box body 1, wherein the lower box body 1 is hollow, and a groove 13 is formed in the top of the lower box body 1;

the bottom of the upper box body 2 is provided with a lug 23 matched with the groove 13;

the sealing ring 3 is placed at the top of the lower box body 1;

the fastener 4, the fastener 4 for fixedly connecting the lower box body 1 and the upper box body 2 drives the lug 23 to be close to the bottom inner surface of the groove 13 so as to press the sealing ring 3.

The lug 23 is driven by the fastener 4 to be close to the inner surface of the bottom of the groove 13 so as to extrude the sealing ring 3, so that the lower box body 1, the upper box body 2 and the sealing ring 3 form a sealed integral structure, under the matching of the lug 23 and the groove 13, the lug 23 is only required to be attached to the groove 13 when being fastened at every time, the force exerted on the sealing ring 3 at every time is ensured to be unchanged, and the situation of overlarge or undersize force can not occur.

In the solution of the embodiment of the present disclosure, in fig. 3, a lower sealing surface 11 and a first threaded hole 12 extend outward from a top portion of a peripheral sidewall of the lower case 1, and a recess 13 is formed in the top portion of the lower case 1.

In the actual design process, if the groove 13 is disposed at the lower sealing surface 11, the overall strength of the lower sealing surface 11 is not high, and the sealing performance is not good, and the process of processing the groove on the side wall of the lower box 1 is simpler than the process of forming the groove on the lower sealing surface, so in the embodiment of the disclosure, the groove 13 is located right above the top of the peripheral side wall of the lower box 1, and is not formed on the lower sealing surface, so as to improve the sealing performance.

In the solution of the disclosed embodiment, referring to fig. 5, the mating surface of the upper case 2 and the lower case 1 extends outward to form an upper sealing surface 21, an integral protruding piece 23 is fixedly arranged on the peripheral side wall of the upper case 2, and the thickness of the protruding piece 23 is the same as the width of the groove 13.

In the actual use process, the square lower sealing surface 11 and the square upper sealing surface 21 are easy to touch people or objects, so that four corners of the lower sealing surface 11 and the upper sealing surface 21 are smoothly processed and polished into circular arc shapes, and the safety performance is improved.

In order to better explain fastener 4, in the embodiment of the present disclosure, refer to fig. 1 and 6, and fig. 6 is a top view of the upper cover plate in the power battery box with a sealed structure provided in the embodiment of the present disclosure, fastener 4 is a fastening bolt, a plurality of first threaded holes 12 are uniformly opened on the circumferential side of lower sealing surface 11 at this time, a plurality of second threaded holes 22 corresponding to first threaded holes 12 are opened on upper sealing surface 21, a plurality of third threaded holes 31 corresponding to threaded holes are opened on sealing ring 3, first threaded holes 12, second threaded holes 22, and third threaded holes 31 are screwed in sequence, so that lower box 1 and upper box 2 are close to each other and fastened together.

Specifically, for convenience of understanding, assuming that the height of the groove 13 is h1 and the width is w1, the height of the protruding piece 23 is h2, and h2< h1, and the thickness is w1, the gasket 3 is sandwiched between the lower sealing surface 11 and the upper sealing surface 21, and the initial thickness of the gasket 3 before compression is T, in the battery case according to the present invention, when the nut is used to pass through the second threaded hole 22 of the upper cover plate 2, the third threaded hole 31 of the gasket 3, and the first threaded hole 12 rotationally fixed to the lower case 1, if the original distance d between the protruding piece 23 of the upper cover plate 2 and the groove 13 of the lower case 1 is h1-h2, which is an appropriate compression amount of the gasket, and d is smaller than the initial thickness of the gasket 3 before compression, which is T, T > d. When the fastening piece 4 rotates downwards, the upper convex surface of the convex piece 23 of the upper cover plate 2 approaches to the lower concave surface of the groove 13 of the lower box body 1, when the two surfaces just contact, the nut column stops rotating downwards, the compression amount of the sealing ring 3 is just d, and the convex piece of the upper cover plate and the groove of the lower box body are overlapped to form a new sealing surface, so that reliable sealing is ensured.

As a further scheme of the embodiment of the present disclosure, the device may further include an i-beam, a threaded hole for fastening the lower case 1 and the upper case 2 is formed in the i-beam, and the device may be fixed by an external nut.

As a further scheme of the embodiment of the disclosure, the device can further comprise concave steel formed by welding a vertical plate and two transverse plates, threaded holes are formed in the two transverse plates, and the device can be fixed through external nuts.

In addition, the width of the lower sealing surface 11 of the lower box body 1 is larger than that of the sealing ring 3; the width of the upper sealing surface 21 of the upper cover plate 2 is larger than that of the sealing ring 3; the upper cover plate 2 and the lower box body 1 are formed by metal plates.

The working principle is as follows: when the nut is used to pass through the second threaded hole 22 of the upper box 2, the third threaded hole 31 of the seal ring 3 and the first threaded hole 12 of the lower box 1 and is rotationally fixed, as the fastening piece 4 rotates downwards, the upper convex surface of the convex piece 23 of the upper cover plate 2 approaches the lower concave surface of the groove 13 of the lower box 1, when the two surfaces just contact, the nut column stops rotating downwards, and the convex piece of the upper cover plate and the groove of the lower box overlap to form a new sealing surface, so that reliable sealing is ensured.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a seal structure power battery box which characterized in that includes:

the device comprises a lower box body (1), wherein the lower box body (1) is hollow, and a groove (13) is formed in the top of the lower box body (1);

the bottom of the upper box body (2) is provided with a lug (23) matched with the groove (13);

the sealing ring (3) is placed at the top of the lower box body (1);

the fastener (4) is used for fixedly connecting the lower box body (1) and the upper box body (2), and the fastener (4) drives the lug (23) to be close to the inner surface of the bottom of the groove (13) so as to extrude the sealing ring.

2. The power battery case with a sealed structure according to claim 1, wherein a lower sealing surface (11) and a first screw hole (12) extend outward from the top of the peripheral sidewall of the lower case (1).

3. A sealed structure power battery box according to claim 2, characterized in that the upper box (2) and the lower box (1) are provided with an upper sealing surface (21) extending outwards.

4. The power battery box body with the sealing structure as claimed in claim 1, wherein the top of the lower box body (1) is provided with a groove (13), and the peripheral side wall of the upper box body (2) is fixedly provided with an integrated lug (23).

5. The power battery box body with the sealing structure according to claim 3, wherein the fastening piece (4) is a fastening bolt, a plurality of first threaded holes (12) are uniformly formed in the peripheral side of the lower sealing surface (11), a plurality of second threaded holes (22) corresponding to the first threaded holes (12) are formed in the upper sealing surface (21), a plurality of third threaded holes (31) corresponding to the threaded holes are formed in the sealing ring (3), and the fastening piece (4) is screwed into the first threaded holes (12), the second threaded holes (22) and the third threaded holes (31) in sequence to fix the lower box body (1) and the upper box body (2).

6. The power battery box body with the sealing structure as claimed in claim 5, further comprising an I-shaped steel, wherein a fourth threaded hole for fastening the lower box body (1) and the upper box body (2) is formed in the I-shaped steel.

7. The power battery box body with the sealing structure as claimed in claim 5, further comprising concave steel welded by a vertical plate and two transverse plates, wherein the two transverse plates are provided with threaded holes.

8. The power battery case with a sealing structure according to claim 4, wherein: the thickness of the lug (23) is the same as the width of the groove (13).

9. The power battery box body with the sealing structure as claimed in claim 3, wherein the width of the lower sealing surface (11) of the lower box body (1) is larger than that of the sealing ring (3); the width of an upper sealing surface (21) of the upper box body (2) is larger than that of the sealing ring (3); the upper box body (2) and the lower box body (1) are formed through sheet metal.