KR20230008547A - High voltage battery protection pack - Google Patents

Abstract

A high voltage battery protection pack according to an embodiment of the present invention includes: an upper case having a coupling plate protruding along the outer circumferential surface and a plurality of coupling holes formed at intervals on the coupling plate; a lower case in which a plurality of weld bolts passing through the coupling holes of the upper case are welded to the upper part of a connection plate protruding from the outer circumferential surface; and a gasket having a protective hole covering the head of the weld bolts while sealing a gap between the upper case and the lower case.

Description

High voltage battery protection pack {HIGH VOLTAGE BATTERY PROTECTION PACK}

The present invention relates to a high voltage battery protection pack.

In general, a watertight structure of a battery is welded with weld bolts and nuts in a state where a hole is drilled in a lower case. Since such a welded portion does not guarantee complete airtightness, moisture may penetrate into the inside of the gasket.

Inside the gasket, there is a bush that creates torque and axial force. When moisture flows into such a bush, frictional force is lowered and screw loosening may occur.

Here, since the gasket and the bush are not integral, the bush must be force-fitted to the gasket through a separate manual operation. This soon causes an increase in working time.

In addition, the gasket in which the bush is forcibly fitted has a problem in that the bush is often separated during logistics, which can cause quality problems.

The present invention has been proposed to solve the above problems, and the purpose of the present invention is to provide a high voltage battery protection pack that can reduce costs as well as improve airtight performance by removing the welding hole and bush of the lower case, which was a water penetration path. there is

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned herein will be clearly understood by those skilled in the art from the following description.

A high voltage battery protection pack according to an embodiment of the present invention includes an upper case having a fastening plate protruding along an outer circumferential surface, a plurality of fastening holes formed at intervals in the fastening plate, and a plurality of fastening holes penetrating the upper case. It includes a lower case in which weld bolts are welded to an upper portion of a connecting plate protruding from an outer circumferential surface, and a gasket having a protective hole that seals between the upper case and the lower case and surrounds the head of the weld bolt.

The connection plate is made in a form corresponding to the fastening plate, and the head of the weld bolt is welded to the upper surface at intervals.

A weld groove recessed in a shape corresponding to the head portion of the connection plate is formed on an upper surface where the head portion of the weld bolt is welded.

In the connection plate, a weld groove recessed in a relatively wider shape than the head portion is formed on an upper surface to which the head portion of the weld bolt is welded, and a weld bead is formed between the weld groove and the head portion.

A bracket having a connection hole corresponding to the fastening hole of the upper case is fastened to the upper portion of the fastening plate.

The bracket is made in a form corresponding to the fastening plate, and is provided with a reinforcing plate for each section.

The assembly nut is inserted into the end of the shaft of the weld bolt while sequentially passing through the fastening hole of the upper case and the connection hole of the bracket, and the gasket is compressed as the distance between the head of the weld bolt and the assembly nut is reduced. Make sure the bottom case is tight.

The gasket has steps protruding upwards and downwards, respectively, and upper and lower fixing grooves are formed in the upper and lower cases, respectively, at portions in contact with the steps of the gasket.

The protective hole of the gasket has a relatively larger diameter than the head portion of the weld bolt.

A high voltage battery protection pack according to another embodiment of the present invention includes an upper case including a fastening plate protruding along an outer circumferential surface; a lower case in airtight contact with the upper case; and a bracket having a shape corresponding to the fastening plate and disposed above the fastening plate.

At this time, the lower case includes a connecting plate protruding from an outer circumferential surface and disposed below the fastening plate, and a weld bolt welded to the upper part of the connecting plate and passing through the fastening plate and the bracket and fixed with an assembly nut.

An end of the connection plate may be bent upward to be fastened with the fastening plate by a snap-fit.

It is preferable that the upper and lower cases are airtightly fastened in a spaced apart state by the head portion of the weld bolt.

The bracket has a connecting hole through which the shaft of the weld bolt passes.

The fastening plate has fastening holes through which shafts of weld bolts pass.

A high voltage battery protection pack according to another embodiment of the present invention includes an upper case having a fastening plate protruding along an outer circumferential surface and a plurality of fastening holes formed at intervals in the fastening plate; A lower case in which a connecting plate having a shape corresponding to the fastening plate protrudes from an outer circumferential surface and a weld nut (or stud nut) communicating with the fastening hole of the upper case is welded to the upper part of the connecting plate; A gasket sealing between the upper case and the lower case and having a protective hole surrounding the weld nut; and an assembly bolt that passes through the fastening hole of the upper case and is fitted and fastened to the weld nut.

The assembly bolt includes a head portion that comes into contact with the fastening plate of the upper case, and a shaft portion extending from the head portion and having a screw thread on an outer circumferential surface.

The length of the shaft portion is formed relatively shorter than the laminated thickness of the fastening plate, the connection plate, and the gasket.

At this time, the high voltage battery protection pack according to another embodiment of the present invention further includes a bracket having a connection hole communicating with the fastening hole and disposed on the upper portion of the fastening plate.

Here, the assembling bolt is preferably inserted into the weld nut after penetrating the fastening hole in the state of penetrating the connecting hole.

The assembling bolt includes a head portion in contact with the bracket of the upper case, and a shaft portion extending from the head portion and having a screw thread on an outer circumferential surface.

The length of the shaft portion is preferably shorter than or equal to the laminated thickness of the bracket, fastening plate, connecting plate, and gasket.

According to the present invention, the penetration of moisture can be prevented by removing the welding hole of the lower case and the bush, which are moisture penetration paths. Accordingly, the present invention can reduce cost along with improvement in airtight performance.

In addition, the present invention provides an effect of reducing work time and significantly reducing the occurrence rate of defective products by improving the conventional method of forcibly fitting the bush into the gasket.

1 is a perspective view showing a high voltage battery protection pack according to a first embodiment of the present invention;
2 is an exploded perspective view illustrating a high voltage battery protection pack according to a first embodiment of the present invention.
3 is a partial perspective view showing each component in the high voltage battery protection pack according to the first embodiment of the present invention.
4 is an upper assembly view of a high voltage battery protection pack according to a first embodiment of the present invention.
5 is an exploded view of the upper assembly of the high voltage battery protection pack according to the first embodiment of the present invention.
6 is a lower assembly view of the high voltage battery protection pack according to the first embodiment of the present invention.
7 is a partial cross-sectional view of a high voltage battery protection pack according to a first embodiment of the present invention.
8 is a partial cross-sectional view of a high voltage battery protection pack according to a second embodiment of the present invention.
9 is a partial cross-sectional view of a modified example of a high voltage battery protection pack according to a second embodiment of the present invention.
10 is a partial cross-sectional view of a high voltage battery protection pack according to a third embodiment of the present invention.
11 is a partial cross-sectional view of a high voltage battery protection pack according to a fourth embodiment of the present invention.
12 is a partial cross-sectional view of a modified example of a high voltage battery protection pack according to a fourth embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is defined by the description of the claims. Meanwhile, terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" or "comprising" means the presence or absence of one or more other elements, steps, operations and/or elements other than the recited elements, steps, operations and/or elements; do not rule out additions.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

1 is a perspective view showing a high voltage battery protection pack according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a high voltage battery protection pack according to an embodiment of the present invention, and FIG. In the high voltage battery protection pack according to, it is a partial perspective view showing each component.

Referring to FIGS. 1 to 3 , the high voltage battery protection pack 100 includes an upper case 110 , a lower case 120 , a gasket 130 and a bracket 140 .

The upper case 110 includes a fastening plate 111 and a fastening hole 112 .

Here, the fastening plate 111 is formed in a protruding form along the outer circumferential surface of the upper case 110 . The fastening holes 112 are formed at intervals on the fastening plate 111 and consist of a plurality.

The lower case 120 is disposed below the upper case 110 and has a structure assembled with the upper case 110 . A connecting plate 121 protrudes from the upper outer circumferential surface of the lower case 120 . A plurality of weld bolts 150 passing through the fastening holes 112 of the upper case 110 are welded to the upper portion of the connection plate 121 .

The gasket 130 seals between the upper case 110 and the lower case 120 . To this end, the gasket 130 is made of a rubber material capable of elastic deformation. At this time, the gasket 130 has a protective hole 131 surrounding the head portion 151 of the weld bolt 150 .

The protective hole 131 of the gasket 130 preferably has a relatively larger diameter than the head portion 151 of the weld bolt 150 . This is because the gasket 130 can be smoothly fixed between the upper and lower cases 110 and 120 . As a result, the working time can be effectively shortened.

In the conventional gasket, bushes (not shown) are forcibly fitted into a plurality of holes formed in the longitudinal direction in order to generate torque and axial force. However, when moisture is introduced into the bush, screw loosening occurs due to a decrease in frictional force.

In addition, since the conventional gasket is not integral with the bush, it is inconvenient to manually forcefully fit the bush into the gasket.

In order to solve this conventional problem, the gasket 130 of the present invention has a bush removed. In the case of the present invention, since the axial force of the gasket 130 is created by the head portion 151 of the weld bolt 150, there is no problem with durability.

Meanwhile, the gasket 130 has steps 132 protruding upward and downward, respectively. At this time, upper and lower fixing grooves (not shown) may be formed in the upper case 110 and the lower case 120 at portions of the gasket 130 that come into contact with the stepped 132 . This structure provides an effect of improving airtight performance while the gasket 130 is more firmly fixed between the upper and lower cases 110 and 120 .

The bracket 140 is disposed above the fastening plate 111 of the upper case 110 . The bracket 140 has a connection hole 141 corresponding to the fastening hole 112 of the upper case 110 . At this time, the bracket 140 is formed in a form corresponding to the fastening plate 111. In addition, the bracket 140 is provided with a reinforcing plate 142 for every partial section, so durability is good.

4 is an upper assembly view of a high voltage battery protection pack according to an embodiment of the present invention, FIG. 5 is an exploded upper assembly view of the high voltage battery protection pack according to an embodiment of the present invention, and FIG. 6 is an upper assembly view of the high voltage battery protection pack according to an embodiment of the present invention It is a lower assembly view of the high voltage battery protection pack according to the example.

Referring to FIGS. 4 to 6 , the connection plate 121 has a shape corresponding to the fastening plate 111 . The head part 151 of the weld bolt 150 is welded to the upper surface of the connecting plate 121 at intervals.

There is no separate hole at the bottom of the connection plate 121. Conventionally, the weld bolt 150 was inserted into a separate hole and welded, but there was a problem of moisture infiltrating the welded portion.

Accordingly, in the lower case 120 of the present invention, the weld bolt 150 is not inserted and welded as in the prior art, and the head portion 151 is welded to the upper part of the connecting plate 121, thereby blocking contact with the outside at all. . Due to this, since the upper case 110 and the lower case 120 are made of an airtight structure, the watertight performance is improved compared to the prior art.

7 is a partial cross-sectional view of a high voltage battery protection pack according to an embodiment of the present invention.

Referring to FIG. 7 , a gasket 130 is disposed between the upper case 110 and the lower case 120 . A weld bolt 150 is welded to an upper portion of the connecting plate 121 of the lower case 120 .

That is, the head portion 151 of the weld bolt 150 is welded to the connecting plate 121, and the shaft portion 152 of the weld bolt 150 is connected to the fastening hole (112 in FIG. 3) of the upper case 110 and the bracket. It passes through the connection hole (141 in FIG. 3) of 140.

At this time, the assembly nut 160 is fitted to the end of the shaft portion 152 of the weld bolt 150. Between the outer circumferential surface of the shaft portion 152 of the weld bolt 150 and the inner circumferential surface of the assembly nut 160, a screw thread structure having a tooth and a pubic bone may be formed.

For example, when the assembling nut 160 is rotated in one direction along the longitudinal direction of the shaft portion 152, the gap between the head portion 151 and the assembling nut 160 is reduced, and the gasket 130 is attached to the upper case 110 And is compressed between the lower case (120). Due to this, the gasket 130 seals between the upper case 110 and the lower case 120 .

In other words, when the distance between the assembly nut 160 and the shaft portion 152 of the weld bolt 150 is reduced, the gasket 130 is compressed by the compressive force and becomes relatively smaller than the initial thickness, but the adhesion becomes stronger by that much, so that the upper case 110 ) and the lower case 120 can be airtightly protected.

The protective hole ( 131 in FIG. 3 ) of the gasket 130 surrounds both ends of the head portion 151 of the weld bolt 150 to prevent penetration of moisture between the upper case 110 and the lower case 120. have

Second embodiment

8 is a partial cross-sectional view of a high voltage battery protection pack according to a second embodiment of the present invention.

According to FIG. 8 , the high voltage battery protection pack 200 has an airtight structure where the upper case 210 and the lower case 220 are assembled, so that external moisture can be suppressed. In addition, the high voltage battery protection pack 200 reduces the size of the gasket 230 by forming the connection plate 221 of the lower case 220 in embossed and intaglio shapes, and enables position regulation of the weld bolt 250. Significant.

That is, at the upper end of the connecting plate 221 of the lower case 220, a welding groove 222 formed in a negative shape and a raised portion 223 formed in an embossed shape and tightly engaged with the gasket 230 are formed.

Here, the welding groove 222 has a recessed structure corresponding to the head portion 251 on the upper surface where the head portion 251 of the weld bolt 250 is welded. The structure of the welding groove 222 may be applied as one modified embodiment to allow the weld bolt 250 to be more firmly fixed to the connecting plate 221 .

In another modified embodiment, the connecting plate 221 has a weld groove (not shown) recessed in a relatively wider shape than the head portion 251 on the upper surface where the head portion 251 of the weld bolt 250 is welded. may be formed. At this time, it is preferable that a weld bead is formed between the weld groove and the head portion 251 .

Meanwhile, the upper portion of the gasket 230 and the lower portion of the upper case 210 may be fastened with a snap-fit. In other words, a pin protruding upward may be formed at an upper end of the gasket 230 , and a pin groove corresponding to a pin of the gasket 230 may be formed at a lower end of the upper case 210 . Alternatively, as shown in FIG. 8 , a pin hole through which a pin of the gasket 230 passes may be formed at the lower end of the upper case 210 .

Modification of the second embodiment

9 is a partial cross-sectional view of a modified example of a high voltage battery protection pack according to a second embodiment of the present invention.

FIG. 9 is a view showing a modified example of FIG. 8 . The high voltage battery protection pack 200 in FIG. 9 has a gap between the upper case 210 and the lower case 220 so as to be airtightly connected even without a gasket. It has a structure in which the raised portion 223 on the upper end of the connection plate 221 surrounding the head portion 251 of the weld bolt 250 is formed in an embossed shape.

At this time, the raised portion 223 is bent upward and comes into contact with the upper case 210 . A portion where the raised portion 223 and the upper case 210 come into contact is in surface contact with each other. Here, a separate suction sheet (not shown) may be provided at the upper end of the raised portion 223 that comes into contact with the upper case 210 to increase adhesion with the upper case 210 .

Meanwhile, since it is preferable that the upper case 210 and the lower case 220 are airtightly fastened while being spaced apart by the head portion 251 of the weld bolt 250, the upper end of the raised portion 223 and the upper case in contact therewith. The lower end of 210 may be fastened with a snap-fit.

Third embodiment

10 is a partial cross-sectional view of a high voltage battery protection pack according to a third embodiment of the present invention.

The high voltage battery protection pack 300 in FIG. 10 shows a structure in which a weld nut 380 is positioned between the upper and lower cases 310 and 320 and welded instead of the weld bolt.

In the lower case 320, a connection plate 321 having a shape corresponding to the fastening plate (111 in FIG. 3) protrudes from the outer circumferential surface and communicates with the fastening hole (112 in FIG. 3) of the upper case 310. A weld nut 380 is welded to the top of the connecting plate 321.

The gasket 330 seals between the upper case 310 and the lower case 320 and has a protective hole surrounding the weld nut 380 .

The assembly bolt 370 passes through the fastening hole of the upper case 310 and is inserted into the weld nut 380.

The assembly bolt 370 includes a head portion contacting the fastening plate of the upper case 310 and a shaft portion extending from the head portion and having a screw thread on an outer circumferential surface.

It is preferable that the length of the shaft portion is relatively shorter than the laminated thickness of the fastening plate, the connection plate 321, and the gasket 330.

The high voltage battery protection pack 300 is significant in that it reduces the size of the gasket 330 by forming the connection plate 321 of the lower case 320 in a negative shape, and enables position regulation of the weld nut 380 .

That is, a welding groove 322 formed in a negative shape is formed at an upper end of the connecting plate 321 of the lower case 320 . At this time, the connection plate 321 is airtightly engaged with the gasket 330 around the welding groove 322 .

The weld groove 322 has a recessed structure corresponding to the weld nut 380 on the upper surface where the weld nut 380 is welded. The structure of the weld groove 322 may be applied as one modified embodiment to allow the weld nut 380 to be more firmly fixed to the connection plate 321 .

4th embodiment

11 is a partial cross-sectional view of a high voltage battery protection pack according to a fourth embodiment of the present invention.

The high voltage battery protection pack 400 in FIG. 11 shows a structure in which a gasket 430 is fixed by applying a gasket groove 422 to a connection plate 421 .

At this time, the gasket groove 422 is a product formed by forming the connection plate 421 in an embossed shape, and in addition to regulating the position of the gasket 430, it prevents moisture from penetrating into the lower gap of the gasket 430. It has a characteristic.

In this case, the gasket 430 may be fastened with the lower end of the upper case 410 and the snap fit so as to be fixed between the lower end of the upper case 410 and the upper end of the lower case 420 without shaking.

Modification of the fourth embodiment

12 is a partial cross-sectional view of a modified example of a high voltage battery protection pack according to a fourth embodiment of the present invention.

According to FIG. 12, since the gasket 430 is basically aimed at preventing moisture from penetrating between the upper case 410 and the lower case 420, the fusion formed in an embossed shape on the top of the connecting plate 421 It has an airtight groove 431 corresponding to the base 423.

The gasket 430 may be fixed between the upper case 410 and the lower case 420 without shaking as the airtight groove 431 comes into contact with the raised portion 423 and is compressed.

Meanwhile, the gasket groove 422 located on the top of the connection plate 421 primarily fixes the gasket 430, and secondarily, the head portion 451 of the weld bolt 450 is spaced apart from the head portion 451. A space in which a welding bead can be filled is provided so that the upper end of the portion 451 and the connection plate 421 are welded securely.

The present invention is not limited to the above-described embodiments, and can be implemented with various modifications within the scope permitted by the technical spirit of the present invention.

100, 200, 300, 400: High Voltage Battery Protection Pack
110, 210, 310, 410: upper case
111: fastening plate
112: fastener
120, 220, 320, 420: lower case
121, 221, 321, 421: connecting plate
130, 230, 330, 430: gasket
131: protection hole
132: stepped
140, 240, 340, 440: bracket
141, 241, 341, 441: connection hole
142, 242, 342, 442: reinforcing plate
150: weld bolt
151, 251, 451: head part
152, 252, 452: shaft part
160, 260: assembly nut
222: bolt groove
223, 423: forming unit
322: nut groove
370: assembly bolt
380: weld nut (or stud nut)
422: gasket groove
431 confidential home

Claims (14)

An upper case having a fastening plate protruding along an outer circumferential surface and a plurality of fastening holes formed at intervals in the fastening plate;
a lower case in which a plurality of weld bolts passing through the fastening holes of the upper case are welded to an upper portion of a connection plate protruding from an outer circumferential surface;
a gasket sealing a space between the upper case and the lower case and having a protective hole surrounding the head of the weld bolt; and
The connecting plate
A high voltage battery protection pack, wherein a weld groove recessed in a shape corresponding to the head portion is formed on an upper surface where the head portion of the weld bolt is welded.
According to claim 1,
The weld groove is
It is made in a recessed form relatively wider than the head of the weld bolt,
A high voltage battery protection pack, wherein a weld bead is formed between the weld groove and the head portion.
According to claim 1,
The high voltage battery protection pack, wherein the connection plate is formed with raised portions formed embossed toward the upper case at every partial section along the longitudinal direction.
According to claim 1,
The high-voltage battery protection pack, wherein the connecting plate is formed with weld grooves formed intaglio to the outside at every partial section along the length direction, so that the weld bolt can be fixed in position.
According to claim 1,
The gasket has a pin protruding upward,
The high voltage battery protection pack of claim 1 , wherein a pin groove is formed in a portion of the upper case in contact with a pin of the gasket.
According to claim 1,
The gasket has a pin protruding upward,
A high voltage battery protection pack, wherein a pin hole through which a pin of the gasket passes is formed in the upper case.
According to claim 1,
The high voltage battery protection pack, wherein the upper end of the gasket and the lower end of the upper case 210 are fastened with a snap-fit.
According to claim 1,
At the top of the fastening plate
The high voltage battery protection pack to which a bracket having a connection hole corresponding to the fastening hole of the upper case is fastened.
According to claim 8,
the bracket
A high-voltage battery protection pack made in a form corresponding to the fastening plate and having a reinforcing plate for each section.
According to claim 8,
The shaft of the weld bolt
An assembly nut is fitted and fastened to the end in a state of sequentially passing through the fastening hole of the upper case and the connection hole of the bracket,
As the gap between the head of the weld bolt and the assembly nut decreases, the gasket is compressed so that the upper and lower cases come into close contact with each other.
An upper case having a fastening plate protruding along an outer circumferential surface and a plurality of fastening holes formed at intervals in the fastening plate;
a lower case airtightly contacting the upper case; and
A weld bolt disposed between the upper case and the lower case to maintain axial force,
the lower case
The high-voltage battery protection pack, wherein a connection plate having a shape corresponding to the fastening plate and having a raised portion partially formed in an embossed shape protrudes from an outer circumferential surface.
According to claim 11,
The ridge is
The high voltage battery protection pack, which is in airtight contact with the fastening plate with the head of the weld bolt interposed therebetween.
According to claim 12,
The ridge is
A high-voltage battery protection pack formed by bending upward and making surface contact with the lower end of the fastening plate.
According to claim 11,
A high voltage battery protection pack, wherein a suction sheet is provided between the raised portion and the fastening plate.

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