KR20240087349A - Battery Case - Google Patents

Abstract

The battery case of the present invention includes a support portion on which a plurality of battery modules are seated and supported; An inner frame coupled to the upper surface of the support portion and dividing the seating portion of the battery module; and an external frame coupled to the outer surface of the support unit, wherein the internal frame includes a full-trusion member made of a fiber-reinforced plastic composite material and provided with a plurality of fastening holes on the upper surface, and the full-trusion member. It is inserted and mounted on the front member and includes a reinforcing member supporting the plurality of fastening hole portions.

Description

Battery Case

The present invention relates to a battery case, and more specifically, to the structure of a battery case composed of a full-trusion member whose inner frame is full-trusion molded with a fiber-reinforced plastic composite and a reinforcing member inserted into the full-trusion member.

Recently, as environmental issues have emerged as a major issue, major changes are occurring in the automobile industry. Globally, fuel efficiency regulations for automobiles are becoming increasingly stringent, and in response to this, the automobile industry is developing technologies to reduce the weight of hybrid vehicles, electric vehicles, and automobile parts, and these are actually being commercialized.

In particular, in relation to the development of technology to reduce the weight of electric vehicle parts, changes in materials for the battery case that supports electric vehicle batteries are required, and changes in the bonding structure between each component are required to improve productivity and durability.

In other words, the battery case according to the prior art has a problem in that the weight of the vehicle body increases as it is made of metal. In addition, if the battery case is made of a plastic composite material to reduce the weight of the car body, the impact strength may be weakened, and the assembly process between the parts that make up the battery case is implemented in a manner similar to adhesion between dissimilar materials, thereby increasing the cost. This increasing problem occurs.

Registered Patent Publication No. 10-1315741

The present invention provides a battery case in which the internal frame is composed of a full-trusion member made of a fiber-reinforced plastic composite and a reinforcing member inserted into the full-trusion member, thereby reducing the weight and satisfying sufficient impact properties and fastening strength. The purpose.

The battery case of the present invention for achieving the above object includes a support portion on which a plurality of battery modules are seated and supported; An inner frame coupled to the upper surface of the support portion and dividing the seating portion of the battery module; and an external frame coupled to the outer surface of the support unit, wherein the internal frame includes a full-trusion member made of a fiber-reinforced plastic composite material and provided with a plurality of fastening holes on the upper surface, and the full-trusion member. It is inserted and mounted on the front member and includes a reinforcing member supporting the plurality of fastening hole portions.

In the internal frame of the battery case according to the first embodiment of the present invention, the full trusion member includes glass fiber as a reinforcing fiber, and the reinforcing member may be molded with SMC (Sheet Molding Compound) containing glass fiber. .

The full trusion member may include a tubular portion having a rectangular cross-section, a plurality of fastening holes formed on an upper surface of the tubular portion, and a support rib portion integrally formed on an inner surface of the tubular portion.

The reinforcing member may include a base plate portion supported by the pair of support ribs, and a plurality of boss portions that support the plurality of fastening hole portions and into which the fastening member is inserted.

The reinforcing member may further include a connecting rib connected between a pair of boss portions, and a reinforcing rib integrally formed on the upper surface of the base plate portion to intersect the connecting rib and extend in the longitudinal direction.

In the internal frame of the battery case according to the second embodiment of the present invention, the full trusion member includes glass fiber as a reinforcing fiber, and the reinforcing member may be molded from a metal plate.

The full trusion member may include a tubular portion having a rectangular cross-section, a plurality of fastening holes formed on an upper surface of the tubular portion, and a support rib portion integrally formed on an inner surface of the tubular portion.

The reinforcing member includes a flat portion that is inserted into contact with the ceiling surface of the tubular portion and the fastening member is inserted into a plurality of holes corresponding to the plurality of fastening holes, and a pair of side walls that are bent on both sides of the flat portion and extend downward. It may include a portion and a pair of support rib portions bent at the bottom of the pair of side wall portions and extending inward.

In the internal frame of the battery case according to the third embodiment of the present invention, the full trusion member includes glass fiber as a reinforcing fiber and a plurality of fastening holes are formed in the horizontal plate at the top, and the reinforcing member is molded from a metal plate. Each may be mounted to support the plurality of fastening hole portions.

The full trusion member may include a lower tubular portion having a rectangular cross-section, a vertical connection portion extending in the longitudinal direction from the upper surface of the lower tubular portion, and a horizontal plate portion integrally formed at the top of the vertical connection portion.

The reinforcing member includes a lower plate portion supported on the upper surface of the lower tubular portion, a side wall portion bent upward from the lower plate portion and supported on a side surface of the vertical connection portion, and a lower surface portion of the horizontal plate portion bent outward from the top of the side wall portion. It may include an upper plate that is in contact with.

A fastening hole corresponding to the fastening hole of the full trusion member may be formed through the upper plate of the reinforcing member.

According to the battery case of the present invention described above, the internal frame is composed of a full-trusion member formed by full-trusion molding of a fiber-reinforced plastic composite material and a reinforcing member inserted into the full-trusion member, thereby reducing the weight while satisfying sufficient impact properties and fastening strength. You can.

1 is a perspective view showing a battery case according to an embodiment of the present invention.
Figure 2 is a perspective view showing the internal frame structure according to the first embodiment of the present invention.
Figure 3 is a partially cut away perspective view showing the internal frame structure of Figure 2.
Figure 4 is a cross-sectional view showing the internal frame structure of Figure 2 and a modification thereof.
Figure 5 is a partially cut away perspective view showing the internal frame structure according to the second embodiment of the present invention.
Figure 6 is a partial perspective view showing the internal frame structure of Figure 5.
Figure 7 is a partially cut away perspective view showing the internal frame structure of Figure 5.
Figure 8 is a perspective view showing the internal frame structure according to the third embodiment of the present invention.
Figure 9 is a partial perspective view showing the internal frame structure of Figure 8.

Since the present invention can be modified in various ways and have various embodiments, specific embodiments will be exemplified and explained in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as 'include' or 'have' are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. At this time, note that in the attached drawings, like components are indicated by the same symbols whenever possible. Additionally, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically shown in the accompanying drawings.

Figure 1 is a perspective view showing a battery case according to an embodiment of the present invention, Figure 2 is a perspective view showing an internal frame structure according to a first embodiment of the present invention, and Figure 3 is a portion showing the internal frame structure of Figure 2. It is a cut-away perspective view, and FIG. 4 is a cross-sectional view showing the internal frame structure of FIG. 2 and its modification.

Referring to FIG. 1, the battery case 1000 of the present invention supports a battery module (not shown), protects the battery module from external shock, and is used to cool the battery module. The battery case 1000 of the present invention constitutes a lower case that supports the battery module from below, and can be combined with a cover case (not shown) that covers the battery module.

As shown in FIG. 1, the battery case 1000 of the present invention includes a support portion 100 on which a plurality of battery modules are seated and supported, an internal frame 300 coupled to the upper surface of the support portion and dividing the seating portion of the battery module, And it includes an external frame 200 coupled to the outer surface of the support part.

In the support unit 100, a plurality of battery modules may be seated and supported in seating units partitioned by the internal frame 300. The support portion 100 may be composed of a heat sink or a lower protective plate, may be composed of a heat sink and a cooling block, or may include all of a heat sink, a cooling block, and a lower protective plate.

The internal frame 300 may be coupled to the upper surface of the support unit 100 to partition the seating portion of the plurality of battery modules.

The outer frame 200 is coupled to surround the outside of the inner frame 300. The external frame 200 may have a rectangular shape with a pair of long sides and a pair of short sides connected to each other.

The external frame 200 includes a side wall portion 210 that extends upward from the edge to surround the lower sides of the plurality of battery modules, and a pair of outer frames that extend horizontally outward from the outer surface of the side wall portion and are coupled to the vehicle body. It may include a bracket portion 220 and a pair of stepped portions 230 that are formed to be stepped on the lower portion of the inner surface of the side wall portion and are coupled to the ends of the inner frame 300.

The side wall portion 210 may be formed to extend upward from the edge portion to a predetermined height to surround the lower sides of the plurality of battery modules. The side wall portion may be formed into an approximately rectangular shape.

The outer bracket portion 220 may be formed to extend outward in the horizontal direction from the outer surface of the side wall portion 210. The outer bracket portion 220 may extend horizontally to a predetermined length from the middle height of the outer surfaces of the two long sides of the rectangular side wall portion 210.

The pair of step portions 230 may be coupled to the step portions formed at the lower ends of both ends of the internal frame 300 using an adhesive or fastening member.

As shown in FIGS. 2 and 3, the internal frame 300 includes a pultrusion member 310 that is pultrusion molded from a fiber-reinforced plastic composite material and has a plurality of fastening holes 313 on the upper surface. , It is inserted and mounted on the full trusion member and may include a reinforcing member 320 supporting the plurality of fastening holes 313.

The full trusion member 310 may be full trusion molded from a fiber-reinforced plastic composite material containing glass fiber as a reinforcing fiber.

The pultrusion molding method is a method of continuously molding products by impregnating continuous fibers with resin, drawing them through a heated mold with a constant cross-sectional shape, and curing them. This forming method is used to manufacture products with the same longitudinal cross-section, such as long tubes, rods, channels, etc. Full-trusion molding consists of a reinforcing fiber spool, a resin bath, a heating mold, a puller, and a cutter. As the reinforcing fiber supplied from the reinforcing fiber spool passes through a resin impregnation tank, the reinforcing fiber is impregnated with resin. The resin-impregnated reinforcing fibers pass through a heated mold to harden the composite material, and the composite product that exits the mold is continuously pulled by a puller. The molded composite product can be cut to a desired length by a cutter and finally completed.

A plurality of fastening holes 313 are formed in the full trusion member 310 and can be coupled to the support part 100 by a plurality of fastening members.

The reinforcing member 320 is installed by being inserted into the full trusion member 310 in the longitudinal direction and is in close contact with the plurality of fastening holes 313 of the full trusion member 310 to form the plurality of fastening holes 313. I can support it.

The reinforcing member 320 may be molded from SMC (Sheet Molding Compound) containing glass fiber. SMC (Sheet Molding Compound) composite material is a type of fiber-reinforced plastic composite material and includes a sheet that is a composite of matrix resin and reinforcing fibers. For example, the sheet may include long fibers as a matrix resin and reinforcing fibers, or may include a fabric woven with continuous fibers as a matrix resin and reinforcing fibers. The fiber-reinforced plastic composite may include a laminated sheet in which a plurality of such sheets are stacked.

In general, sheet molding compound (SMC) is an intermediate material processed into a sheet by mixing thermosetting resin and long fibers (2 to 50 mm), and refers to fiber-reinforced plastic that is hardened through a heat press. In the present invention, sheet molding compound (SMC) is an intermediate material processed into a sheet form with no limitations on the length and type of fiber, and SMC is defined as a fiber-reinforced plastic composite that can be hardened through a heat press.

In the present invention, SMC may include reinforcing fibers in the form of a fabric woven from continuous fibers, or may also include a case where a fiber-reinforced plastic composite containing continuous fibers oriented in one direction as reinforcing fibers is made into a sheet-shaped intermediate material.

In addition, in the present invention, SMC mainly includes glass fiber as a reinforcing fiber, but is not limited by the type of fiber (glass fiber, carbon fiber, aramid fiber, nylon, polypropylene fiber, etc.).

SMC (Sheet Molding Compound) composite material is a mixture of resin materials, glass fibers, fillers, catalysts, and release materials, and has excellent moldability, corrosion resistance, and weather resistance. In particular, long-fiber SMC has the advantage of superior mechanical properties compared to short-fiber composite materials and higher productivity compared to continuous-fiber composite materials. The resin material is a thermosetting resin and may include, for example, unsaturated polyester, epoxy, phenol, etc. The resin material may be made of one type of thermosetting resin, or may be made of multiple types of thermosetting resin.

As shown in Figures 3 and 4, the full trusion member 310 includes a tubular portion 311 having a rectangular cross-section, a plurality of fastening holes 313 formed on the upper surface of the tubular portion, and an inner surface of the tubular portion. It may include a support rib portion 315 formed integrally with the.

The tubular portion 311 may be formed in the shape of a rectangular tubular body with a predetermined thickness. As shown in FIG. 2, a plurality of fastening holes 313 and two circular through holes larger than the fastening holes 313 may be formed on the upper surface of the tubular portion 311. As shown in Figure 1, a boss for screw fastening is installed in the through hole so that the battery case can be coupled to the vehicle body.

The inner frame 300 can be coupled to the support portion 100 by fastening screws or bolts to each of the plurality of fastening holes 313.

As shown in FIGS. 3 and 4, the reinforcing member 320 supports the base plate portion 321 supported by the support rib portion 315 and a plurality of fastening holes 313 and has a plurality of fastening members into which the fastening members are inserted. It may include a boss portion 323.

The base plate portion 321 may be formed in the form of an elongated rectangular plate with a predetermined thickness and width. The length of the base plate portion 321 is formed to be the same as the length of the full truss member 310, so that the full truss member 310 can be reinforced in the longitudinal direction.

The plurality of boss portions 323 may be formed integrally with the base plate portion 321 to match the portions of each fastening hole 313. The plurality of fastening holes 313 may be arranged two in a row on the upper surface of the full truss member 310, and the plurality of boss parts 323 may also be arranged two in a row at positions corresponding to the plurality of fastening holes 313. It can be.

A fastening member 330 capable of fastening a fastening member such as a bolt to each boss portion 323 may be insert injection molded integrally with the reinforcing member 320. The fastening member 330 may have threads formed on its inner peripheral surface like a nut. The fastening member 330 is molded from a metal material and may have sufficient fastening strength.

The reinforcing member 320 is formed integrally with a connecting rib 324 connected between a pair of boss portions 323 and extending longitudinally across the connecting rib 324 on the upper surface of the base plate portion 321. It is desirable to further include reinforcing ribs 325.

The connecting rib 324 may be integrally formed to be connected between the pair of boss portions 323 and the upper surface of the base plate portion 321. The height of the connecting rib 324 may be approximately half the height of the boss portion 323. The thickness of the connecting rib 324 may be similar to the thickness of the base plate portion 321.

The reinforcing rib 325 may be integrally formed on the upper surface of the base plate portion 321, crossing the connecting rib 324, and spanning the entire length of the reinforcing member 320. The thickness and height of the reinforcing rib 325 may be formed to be the same as those of the connecting rib 324.

In addition, a pair of guide rib portions 322 may be formed on the lower surface of the base plate portion 321 to protrude downward from edge portions on both sides in the width direction. A groove into which the pair of guide rib portions 322 is inserted is formed on the upper surface of the pair of support rib portions 315, and the pair of support rib portions 315 are formed in the groove portion of the pair of guide rib portions 322. can be guided and supported.

In addition, in the internal frame structure according to the first embodiment shown in FIG. 4(a), the support rib portions 315 of the full trusion member 310 may be formed so that a pair of them extends to face each other on both inner sides of the tubular portion. there is.

In the case of the modified example shown in FIG. 4(b), the support rib portion 315 of the full trusion member 310 may be formed to be integrally connected to the inner surface of the tubular portion along the entire width direction. In the case of a modified example, the guide rib portion 322 may not be formed on the lower surface of the base plate portion 321, and the groove portion may not be formed on the upper surface of the support rib portion 315.

According to the battery case according to the first embodiment of the present invention, it is possible to secure sufficient collision performance to withstand impacts applied in the longitudinal direction while lightweighting the internal frame, and when fastening bolts through fastening holes of plastic composite material, the reinforcing member is used. Sufficient fastening strength can be secured by fastening to the fastening member inserted into the boss portion of .

FIG. 5 is a partially cut-away perspective view showing the internal frame structure according to the second embodiment of the present invention, FIG. 6 is a partial perspective view showing the internal frame structure of FIG. 5, and FIG. 7 is a partially cut-away view showing the internal frame structure of FIG. 5. It is a perspective view.

As shown in Figures 5 to 7, the internal frame 400 according to the second embodiment of the present invention is also full-trusion molded from a fiber-reinforced plastic composite and has a plurality of fastening holes 413 on the upper surface. It may include a full trusion member 410 and a reinforcing member 420 that is inserted and mounted on the full trusion member and supports a plurality of fastening hole portions.

Here, the full trusion member 410 includes glass fiber as a reinforcing fiber, and the reinforcing member 420 may be molded from a metal plate. The internal frame 400 of the second embodiment is the same as the first embodiment in the material and forming method of the full trusion member 410, but is different from the first embodiment in that the reinforcing member 420 is made of a metal plate.

The full truss member 410 includes a tubular portion 411 having a rectangular cross-section, a plurality of fastening holes 413 formed on the upper surface of the tubular portion, and a pair of support rib portions integrally formed on both sides of the inner side of the tubular portion ( 415) may be included.

5 to 7 show only half or less of the internal frame 400 cut away, rather than the entire internal frame 400.

The tubular portion 411 may be formed in the shape of a rectangular tubular body with a predetermined thickness. As shown in FIG. 5, a plurality of fastening holes 413 and two circular through holes 412 larger than the fastening holes 413 may be formed on the upper surface of the tubular portion 411. As shown in FIG. 1, each through hole 412 is equipped with a screw fastening boss so that the battery case can be coupled to the vehicle body.

The inner frame 300 can be coupled to the support portion 100 by fastening screws or bolts to each of the plurality of fastening holes 413.

A pair of support rib portions 415 may be formed to protrude inward from both inner sides of the tubular portion 411. A pair of support rib portions 415 may be formed integrally at a position higher than half the height of the tubular portion 411.

The reinforcing member 420 formed of a metal plate may be formed using a roll forming method. Roll forming is a plastic processing method in which a metal coil is sequentially formed by passing a metal coil through several sets of forming rollers lined up in a row and folded into the desired cross-sectional shape. Because it is performed sequentially, the appearance and appearance of the product are improved. It is a highly economical processing method because the accuracy is good and mass production is possible. The reinforcing member 420 can be manufactured by forming a metal plate using a roll forming method and then punching a plurality of fastening holes and through holes.

The reinforcing member 420 is inserted into contact with the ceiling surface of the tubular portion 411 and includes a flat portion 421 into which the fastening member 430 is inserted into a plurality of holes corresponding to the plurality of fastening holes 413, and a flat portion of the flat portion. It may include a pair of side wall portions 423 that are bent from both sides and extend downward, and a pair of support rib portions 425 that are bent at the bottom of the pair of side walls and extend inward.

The flat plate portion 421, the pair of side wall portions 423, and the pair of support rib portions 425 may be formed integrally by molding a metal plate. A plurality of holes into which the fastening members 430 are respectively inserted and mounted may be formed in the flat portion 421 at positions corresponding to the plurality of fastening holes 413. The fastening member 430 may be composed of a blind nut or a welded nut, and threads may be formed on the inner peripheral surface so that a bolt or screw can be fastened to the fastening member 430. The length of the flat plate portion 421 is formed to be the same as that of the full trusion member 410, so that it can withstand longitudinal impact applied to the internal frame 400.

The pair of side wall portions 423 may be formed by bending vertically at both ends of the flat portion 421 to contact the inner surface of the tubular portion 411. The height of the pair of side wall portions 423 may be equal to or slightly smaller than the height from the top of the inner surface of the tubular portion 411 to the upper surface of the support rib portion 415.

The pair of support rib portions 425 may be formed by bending the pair of side wall portions 423 in an inward direction at the lower ends. The width of the support rib portion 425 is formed to be the same as that of the support rib portion 415, so that the support rib portion 425 can be supported on the support rib portion 415.

According to the internal frame according to the second embodiment of the present invention, the internal frame is composed of a full-trusion member full-trusion molded from a fiber-reinforced plastic composite and a reinforcing member molded from a metal plate, thereby improving longitudinal impact performance and fastening strength. can be sufficiently secured.

Figure 8 is a perspective view showing the internal frame structure according to the third embodiment of the present invention, and Figure 9 is a partial perspective view showing the internal frame structure of Figure 8.

The internal frame 500 according to the third embodiment of the present invention includes a pultrusion member 510 that is pultrusion molded from a fiber-reinforced plastic composite material and has a plurality of fastening holes 516 on the upper surface, and a pultrusion member 510 that is made of a fiber-reinforced plastic composite material. It is inserted and mounted on the truss member and may include a reinforcing member 420 that supports each of the plurality of fastening hole portions.

Here, the full trusion member 510 includes glass fiber as a reinforcing fiber, and the reinforcing member 520 may be molded from a metal plate. The internal frame 500 of the third embodiment is the same as the second embodiment in terms of the material and forming method of the full truss member 510, but its shape is different, and a plurality of reinforcing members 520 are formed of metal plates and are fastened to each other. It is different from the second embodiment in that it is mounted to support the ball portion.

That is, the full truss member 510 includes glass fiber as a reinforcing fiber and a plurality of fastening holes 516 are formed in the horizontal plate at the top, and the reinforcing member 520 is molded from a metal plate and has a plurality of fastening hole portions. Each can be installed to support .

In FIGS. 8 and 9, only one reinforcing member 520 is shown mounted on one fastening hole 516, but one reinforcing member 520 may be mounted on each fastening hole 516. That is, a plurality of reinforcing members 520 may be formed much shorter than the length of the full trusion member 510 and may be installed one at a time in each fastening hole 516.

The full trusion member 510 includes a lower tubular portion 511 having a rectangular cross-section, a vertical connection portion 513 extending longitudinally from the upper surface of the lower tubular portion, and a horizontal plate portion integrally formed at the top of the vertical connection portion ( 515) may be included.

The full trusion member 510 includes a lower tubular portion 511, a vertical connecting portion 513, and a horizontal plate portion 515, and may have a cross-section that is the same in the longitudinal direction.

The lower tubular portion 511 may be formed in the form of a rectangular tubular body with a predetermined size and thickness.

The vertical connection portion 513 may be formed at the center of the upper surface of the lower tubular portion 511 extending upward to a predetermined height.

The horizontal plate portion 515 may be integrally connected to the upper end of the vertical connecting portion 513 to have the same area as the upper surface of the lower tubular portion 511. A plurality of pairs of fastening holes 516 may be formed through the horizontal plate portion 515 at predetermined intervals.

The reinforcing member 520 includes a lower plate portion 521 supported on the upper surface of the lower tubular portion 511, a side wall portion 522 bent upward from the lower plate portion and supported on the side of the vertical connection portion 513, and a side wall portion 522. It may include an upper plate portion 523 that is bent outward from the top and contacts the lower surface of the horizontal plate portion 515.

The reinforcing member 520 may be formed as one body by bending the lower plate 521, the side wall 522, and the upper plate 523 made of a metal plate perpendicular to each other. Therefore, the reinforcing member 520 may have a “L” shaped cross section.

A fastening hole 524 corresponding to the fastening hole 516 of the full trusion member 510 may be formed through the upper plate portion 523 of the reinforcing member 520. The fastening hole 524 may not be formed in the longitudinal center of the upper plate portion 523 but may be formed near one end of the upper plate portion 523 in the longitudinal direction. A blind nut is inserted into the fastening hole 524 to firmly fasten the fastening member.

Since the full truss member 510 is formed in a shape in which the upper cross section is open laterally, the plurality of reinforcing members 520 can be easily inserted and installed at the positions of the fastening holes on both sides in the width direction.

According to the internal frame according to the third embodiment of the present invention, the internal frame is composed of a full-trusion member molded from a fiber-reinforced plastic composite and a plurality of reinforcing members molded from a metal plate, so that the full-trusion member is Reinforcement members can be easily installed and sufficient fastening strength can be secured.

Above, an embodiment of the present invention has been described, but those skilled in the art will be able to understand the addition, change, deletion or addition of components without departing from the spirit of the present invention as set forth in the claims. The present invention may be modified and changed in various ways, and this will also be included within the scope of the rights of the present invention.

1000: Battery case
100: support part
200: External frame
210: side wall portion
220: Outer bracket part
230: Step part
300: Internal frame (first embodiment)
310: Full truss member 311: Tubular part
313: Fastening hole 315: Support rib part
320: Reinforcing member 321: Base plate part
322: Guide rib part 323: Boss part
324: Connecting rib 325: Reinforcing rib
330: fastening member
400: Internal frame (second embodiment)
410: Full truss member 411: Tubular part
412: Through hole 413: Fastening hole
415: Support rib part
420: Reinforcing member 421: Flat plate part
423: side wall portion 425: support rib portion
430: fastening member
500: Internal frame (third embodiment)
510: Full truss member 511: Lower tubular part
513: vertical connection part 515: horizontal plate part
516: fastener
520: Reinforcing member 521: Lower plate part
522: side wall 523: top plate
524: Fastener

Claims (12)

A support portion on which a plurality of battery modules are seated and supported;
An inner frame coupled to the upper surface of the support portion and dividing the seating portion of the battery module; and
It includes an external frame coupled to the outer surface of the support part,
The internal frame is
A pultrusion member that is pultrusion molded from a fiber-reinforced plastic composite and has a plurality of fastening holes on the upper surface,
A battery case including a reinforcing member that is inserted and mounted on the full trusion member and supports the plurality of fastening hole portions. According to paragraph 1,
The full truss member includes glass fiber as reinforcing fiber,
A battery case wherein the reinforcing member is molded from SMC (Sheet Molding Compound) containing glass fiber. According to paragraph 2,
The full truss member is
A tubular portion with a rectangular cross-section,
A plurality of fastening holes formed on the upper surface of the tubular portion,
A battery case comprising a support rib portion formed integrally with the inner surface of the tubular portion. According to paragraph 3,
The reinforcing member is
A base plate portion supported on the support rib portion,
A battery case comprising a plurality of boss parts that support the plurality of fastening hole portions and into which a fastening member is inserted. According to clause 4,
The reinforcing member is
A connecting rib connected between a pair of boss portions,
The battery case further includes a reinforcing rib integrally formed on the upper surface of the base plate portion to extend longitudinally across the connecting rib. According to paragraph 1,
The full truss member includes glass fiber as reinforcing fiber,
A battery case wherein the reinforcing member is formed of a metal plate. According to clause 6,
The full truss member is
A tubular portion with a rectangular cross-section,
A plurality of fastening holes formed on the upper surface of the tubular portion,
A battery case comprising a support rib portion formed integrally with the inner surface of the tubular portion. In clause 7,
The reinforcing member is
a flat portion inserted into contact with the ceiling surface of the tubular portion and into which a fastening member is inserted into a plurality of holes corresponding to the plurality of fastening holes;
a pair of side wall portions bent on both sides of the flat plate portion and extending downward;
A battery case comprising a pair of support rib parts bent at the bottom of the pair of side walls and extending inward. According to paragraph 1,
The full truss member includes glass fiber as a reinforcing fiber, and a plurality of fastening holes are formed in the horizontal plate at the top,
A battery case, characterized in that the reinforcing members are molded from metal plates and each installed to support the plurality of fastening hole portions. According to clause 9,
The full truss member is
A lower tubular portion having a rectangular cross-section,
a vertical connecting portion extending longitudinally from the upper surface of the lower tubular portion;
A battery case comprising a horizontal plate integrally formed at the top of the vertical connection. According to clause 10,
The reinforcing member is
A lower plate portion supported on the upper surface of the lower tubular portion,
a side wall portion bent upward from the lower plate portion and supported on a side surface of the vertical connection portion;
A battery case comprising an upper plate portion bent outward from the top of the side wall portion and in contact with the lower surface of the horizontal plate portion. According to clause 11,
A battery case, characterized in that a fastening hole corresponding to the fastening hole of the full trusion member is formed through the upper plate of the reinforcing member.

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