KR102486872B1 - Frame type protecting apparatus for battery of car - Google Patents

Abstract

The present invention can greatly reduce the weight of a product by reducing the number of parts using a square tubular integrated frame with a simplified structure, improve crash performance, and significantly improve compressive strength in the front and rear and left and right directions. It relates to a frame-type battery protection device for a vehicle, comprising: an integrated frame in which a battery module accommodating portion is formed and at least one square tubular member is connected to each other; A cooling system installed in the integrated frame to cool heat generated from the battery module; an upper cover installed above the integrated frame to protect the battery module; and an under cover installed under the integrated frame to protect the battery module.

Description

Frame type protecting apparatus for battery of car}

The present invention relates to a frame-type vehicle battery protection device, and more particularly, can greatly reduce the weight of a product by reducing the number of parts by using a square tubular integrated frame having a simplified structure, and improves crash performance, The present invention relates to a frame-type vehicle battery protection device capable of significantly improving compressive strength in front-back and left-right directions.

In general, a battery case of a large-capacity electric vehicle is a device for storing a battery module and protecting the battery from an external environment and collision, and conventionally has a closed curved cross section, that is, a sheet material bent in a monocoque manner to form a closed cross section. Although side members of a simple cross section were formed by welding them to each other, the monocoque structure, that is, the battery case structure formed by adding inner and outer plates to the panel tray increases the number of plates installed, and when assembling the plates There were problems in that the unit cost of the product increased due to a long welding time, and the weight increased due to the increase in the number of parts and plates.

In addition, since the plates, which are relatively thin in thickness compared to their width or length, are easily deformed by external force or impact, they are structurally very vulnerable to protect the battery module from front-and-back and left-right collisions or compressive loads.

In particular, in the prior art, contact between the battery case cover and the battery module occurs due to excessive deformation of the side structure during a collision in the lateral direction, and as a result, when the side member and the battery case cover interfere with the battery module and collide, the battery pack The risk of major accidents such as ignition and explosion may increase significantly.

Korean Patent Application No. 10-1996-0045865

The present invention is to solve various problems, including the above problems, by using a square tubular integrated frame having a simplified structure, the number of parts can be reduced to greatly reduce the weight of the product, improve crash performance, The compressive strength in the front-back and left-right directions can be greatly improved, and the impact performance in the front-back and left-right directions can be improved by using an integral inner bracket bent in a zigzag shape, and the compressive strength can be greatly improved. An object of the present invention is to provide a frame-type vehicle battery protection device capable of significantly improving module and vehicle safety. However, these tasks are illustrative, and the scope of the present invention is not limited thereby.

A frame-type vehicle battery protection device according to the spirit of the present invention for solving the above problems includes an integrated frame having a battery module accommodating portion formed therein and having at least one or more square tubular members connected to each other; A cooling system installed in the integrated frame to cool heat generated from the battery module; an upper cover installed above the integrated frame to protect the battery module; and an under cover installed under the integrated frame to protect the battery module.

In addition, according to the present invention, the integrated frame, the front member installed to correspond to the front of the vehicle; a rear member installed to correspond to the rear of the vehicle; a side member installed on the left or right side of the vehicle to connect one end of the front member to one end of the rear member; at least one vertical member installed in a longitudinal direction between the front member and the rear member so as to respond to a front-and-back collision; and at least one horizontal member installed in a horizontal direction between a side member installed on the left side of the vehicle and a side member installed on the right side of the vehicle so as to respond to a left-right collision.

In addition, according to the present invention, the vertical member may be formed of a square tube having a shape in which a vertical hollow part and a horizontal hollow part are connected in an L shape as a whole while forming a closed curve as a whole by applying a roll forming method.

In addition, according to the present invention, the integrated frame further includes a reinforcing member installed below the inner side of the side member so as to reinforce the side member, and the reinforcing member has a rectangular cross section as a whole while forming a closed curve. It may be made of a square tube in which a square hollow part is formed.

In addition, according to the present invention, the transverse member may be formed of a square tube having a square hollow portion formed with a closed curve in a rectangular shape as a whole and concave portions formed on the left and right side surfaces of the transverse member.

In addition, according to the present invention, the side member is composed of a square tube having an upper hollow portion and a lower hollow portion formed therein, wherein the cross section of the side member forms a closed curve in which the upper and lower portions protrude outward and the outside of the central portion forms a concave concave portion. ; an inner support plate formed in a shape capable of covering the concave portion of the side member; an integrated inner bracket installed on the inner support plate, erected toward the side of the vehicle, and bent in a zigzag shape as a whole along the longitudinal direction of the side member; and an external bending plate installed on the side member and formed in a shape surrounding the inner support plate and the integrated inner bracket.

In addition, according to the present invention, the integrated inner bracket, a plurality of first peaks formed high between the left inclined portion and the right inclined portion to a first height; a plurality of first valleys formed low to a second height between the left inclined part and the right inclined part; and a plurality of mounting parts formed at an intermediate height between the first height and the second height in the middle of the first valley, the positions of which are fixed by fixtures vertically penetrating the side member. there is.

In addition, according to the present invention, the upper surface of the first peak is formed as flat as the first length so as to be in contact with or welded to the inner surface ceiling of the outer bending plate, and the lower surface of the first valley is of the outer bending plate. It can be formed flat as a second length so that it can be welded or contacted with the bottom of the inner surface.

Further, according to the present invention, the mounting part may be formed flat as much as the third length, and a mounting bush may be formed to correspond to the fixture.

In addition, according to the present invention, the front member, the upper and lower parts of the cross section as a whole protrude outward, and the outside of the central portion forms a closed curve forming a concave concave portion, so that the upper hollow portion and the lower hollow portion are formed inside. It can be made of a square tube. .

In addition, according to the present invention, the integrated frame is made of a material containing a steel component, the cooling system is made of a material containing an aluminum component, a refrigerant flow path is installed therein, and the integrated frame and the fixture are made of a material. and may be sealed and bonded to the integrated frame and the sealing member.

According to some embodiments of the present invention made as described above, the weight of a product can be greatly reduced by reducing the number of parts using a square tubular integrated frame having a simplified structure, improving crash performance, and It is possible to greatly improve the compressive strength in the left and right directions, and improve the impact performance in the front and rear directions and the left and right directions by using an integrated inner bracket bent in a zigzag shape, and greatly improve the compressive strength, and through this, the battery module and the vehicle It has the effect of greatly improving the safety of Of course, the scope of the present invention is not limited by these effects.

1 is an exploded perspective view showing a frame-type vehicle battery protection device according to some embodiments of the present invention.
FIG. 2 is an external perspective view illustrating an integrated frame of the frame-type vehicle battery protection device of FIG. 1 .
FIG. 3 is a plan view illustrating an integrated frame of the vehicle battery protection device of the frame type of FIG. 2 .
4 is a perspective view and a cross-sectional view showing a vertical member of the frame-type vehicle battery protection device of FIG. 2 .
5 is a perspective view illustrating a reinforcing member of the frame-type vehicle battery protection device of FIG. 2 .
6 is a perspective view and a cross-sectional view showing a horizontal member of the frame-type vehicle battery protection device of FIG. 2 .
FIG. 7 is a perspective view and a cross-sectional view illustrating a side member of the frame-type vehicle battery protection device of FIG. 2 .
8 is an exploded perspective view of parts and a cross-sectional view of a side member of the frame-type vehicle battery protection device of FIG. 7 .
9 is a perspective view and a cross-sectional view showing a front member of the frame-type vehicle battery protection device of FIG. 2 .
10 is a graph showing the reaction force of the compressive load in the left and right directions of the frame-type vehicle battery protection device of FIG. 1 .
11 is a graph showing the reaction force of the compressive load in the front and rear directions of the frame-type vehicle battery protection device of FIG. 1 .

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

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified in many different forms, and the scope of the present invention is as follows It is not limited to the examples. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of explanation.

Hereinafter, embodiments of the present invention will be described with reference to drawings schematically showing ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, depending on, for example, manufacturing techniques and/or tolerances. Therefore, embodiments of the inventive concept should not be construed as being limited to the specific shape of the region shown in this specification, but should include, for example, a change in shape caused by manufacturing.

1 is an exploded perspective view showing a frame-type vehicle battery protection device 100 according to some embodiments of the present invention.

First, as shown in FIG. 1, the frame-type vehicle battery protection device 100 according to some embodiments of the present invention has a battery module accommodating portion 10a formed therein, and at least one square tube type. An integrated frame 10 formed by connecting members to each other, a cooling system 20 installed in the integrated frame 10 to cool heat generated from the battery module, and the integrated frame 20 to protect the battery module. An upper cover 30 installed above the frame 10 and an under cover 40 installed below the integrated frame 10 to protect the battery module may be included.

Here, as shown in FIG. 1, the integrated frame 10, unlike the conventional monocoque method of bending and joining plate materials, individually welds rectangular pipes having closed curves in cross section and connects them integrally to each other. As a frame-type integrated framework, individual prismatic pipes can be mass-produced at relatively low cost using the roll forming method, so cost can be greatly reduced, and since they are structurally integrated, they can be lightly weighted. It can also withstand heavy loads.

In addition, as shown in FIG. 1 , the cooling system 20 is assembled and adhered to the lower surface of the integrated frame 10 to support the battery module accommodated in the battery module accommodating portion 10a and simultaneously It may be formed in a panel shape as a whole to protect the battery module from moisture or impact.

More specifically, for example, the cooling system 20 is made of a material containing an aluminum component having excellent thermal conductivity so as to cool the heat generated from the battery module, for example, two plate materials are combined, and between them A refrigerant passage C may be installed in the inner space.

As shown in FIG. 1, the cooling system 20 is fixed to the integrated frame 10 with a fixture such as a bolt, screw, bracket, or the like, and the integrated frame 10 and a sealing member such as an adhesive. It can be sealed bonded. However, the shape, material, or structure of the cooling system 20 is not necessarily limited to the drawings, and can be applied in a variety of shapes or materials.

In addition, as shown in FIG. 1 , the upper cover 30 may cover the upper surface of the integrated frame 10 to protect the battery module from water and foreign substances, and the under cover 40 may cover the integrated frame 10 . The battery module and the cooling system 20 may be protected from water and foreign substances by covering the lower surfaces of the (10), respectively.

Here, the integrated frame 10, the upper cover 30, and the under cover 40 may be made of a material containing a steel component so as to have excellent mechanical strength and durability.

2 is an external perspective view showing the integrated frame 10 of the frame-type vehicle battery protection device 100 of FIG. 1, and FIG. 3 is the integrated frame 10 of the frame-type vehicle battery protection device 100 of FIG. It is a plan view showing

More specifically, for example, as shown in FIGS. 2 and 3 , the integrated frame 10 of the vehicle battery protection device 100 of a frame type according to some embodiments of the present invention, the front and A front member 11 installed to correspond, a rear member 12 installed to correspond to the rear of the vehicle, and one end of the front member 11 and one end of the rear member 12 connected to the vehicle A side member 13 installed on the left or right side of and at least one vertical member 14 installed in the longitudinal direction between the front member 11 and the rear member 12 so as to respond to a front-and-back collision And, at least one horizontal member 15 installed in the horizontal direction between the side member 13 installed on the left side of the vehicle and the side member 13 installed on the right side of the vehicle so as to respond to a left-right collision. and a reinforcing member 16 installed below the inner side of the side member 13 to reinforce the side member 13 .

Therefore, the plurality of vertical members 14 and the reinforcing members 16 are installed between the front member 11 and the rear member 12 to increase the compressive load reaction force against the front-and-back collision, A plurality of transverse members 15 are installed between the two side members 13 to increase a compressive load reaction force against a left-right collision.

FIG. 4 is a perspective view and a cross-sectional view showing the vertical member 14 of the frame-type vehicle battery protection device 100 of FIG. 2 .

As shown in (a) of FIG. 4, the vertical member 14 applies a roll forming method to form a closed curve as a whole, and as shown in (b) of FIG. 4, the vertical member 14 ), may be made of a rectangular pipe, that is, an angular pipe shape, in which the vertical hollow part 14a and the horizontal hollow part 14b are connected in an L shape as a whole.

Therefore, the vertical member 14 is an integral square tube structure having a closed curve in a roll-formed cross section, and the vertical hollow part 14a and the horizontal hollow part 14b are formed in an L shape as a whole to move in the vertical or horizontal direction. The reaction force against the compressive load can be greatly improved.

FIG. 5 is a perspective view illustrating a reinforcing member 16 of the vehicle battery protection device 100 of the frame type of FIG. 2 .

As shown in FIG. 5 , the reinforcing member 16 may be formed of a square tube in which a square hollow part 16a is formed while forming a closed curve in a rectangular shape as a whole by applying a roll forming method.

Accordingly, the reinforcing member 16 may be installed below the inside of the side member 13 to reinforce a reaction force against a compressive load in the left and right directions concentrated downward.

FIG. 6 is a perspective view and a cross-sectional view showing the horizontal member 15 of the frame-type vehicle battery protection device 100 of FIG. 2 .

As shown in (a) of FIG. 6, the cross section of the horizontal member 15 forms a closed curve in a rectangular shape as a whole by applying the roll forming method, and as shown in (b) of FIG. 6, the cross member 15 (15) may be formed of a square tube having a square hollow portion 15a formed therein and concave portions 15b formed on left and right side surfaces.

Therefore, the transverse member 15 is an integral square tube structure having a closed curve in a roll-formed cross section, and the square hollow part 15a and the concave part 15b have a reaction force against a compressive load in the vertical direction or the horizontal direction. can be greatly improved.

7 is a perspective view and a cross-sectional view showing the side member 13 of the frame-type vehicle battery protection device 100 of FIG. 2 , and FIG. 8 is a side member 13 of the frame-type vehicle battery protection device 100 of FIG. 7 . ) It is an exploded perspective view of parts and a cross-sectional view of the side member 131 showing.

As shown in FIGS. 7 and 8 , the side member 13 is composed of a plurality of parts, and the side member 13 includes a side member 131, an internal support plate 132, and an integrated body. An inner bracket 133 and an outer bending plate 134 may be included.

More specifically, for example, the side member 131, as shown in (a) of FIG. 8, by applying the roll forming method, the upper and lower sections protrude outward as a whole, and in FIG. 8 (b) As shown in ), the outer side of the central portion forms a closed curve forming the concave concave portion 131a, so that the upper hollow portion 131b and the lower hollow portion 131c are formed inside the square tube.

Accordingly, the side member 131 is an integral square tube structure having a closed curve in a roll-formed cross section, and has a total thickness of 8 mm by the concave portion 131a, the upper hollow portion 131b, and the lower hollow portion 131c. It is intricately bent in a ruler shape, so that the reaction force against the compressive load in the left-right direction, the front-back direction, or the vertical direction can be greatly improved.

In addition, for example, as shown in (a) of FIG. 8, the inner support plate 132 is formed in a shape capable of covering the concave portion 131a of the side member 131 to form the integrated inner bracket ( 133) can be firmly supported so that it does not slide backward.

Accordingly, by using the plate-shaped internal support plate 132 to complicate the internal structure of the side member 13, the reaction force against the compressive load in the left-right direction, front-back direction, or vertical direction can be greatly improved.

In addition, for example, as shown in (a) of FIG. 8, the integrated inner bracket 133 is installed on the inner support plate 132 and is built toward the side of the vehicle, and a roll forming method is applied. Thus, it may be a kind of bending plate structure that is bent in a zigzag shape as a whole along the longitudinal direction of the side member 131 .

More specifically, for example, as shown in the enlarged portion of FIG. 8 (a), the integral inner bracket 133 has a first height between the left inclined portion 1331 and the right inclined portion 1332. A plurality of first hills 1333 formed high with a plurality of first valleys 1334 formed low with a second height between the left inclined part 1331 and the right inclined part 1332, and the first A plurality of mounting parts 1335 formed at an intermediate height between the first height and the second height in the middle of the valley 1334 and fixed in position by fixtures vertically penetrating the side member 131 can include

Here, the upper surface of the first mountain portion 1333 is formed flat as much as a first length so as to be in contact with or welded to the inner surface ceiling of the external bending plate 134, and the lower surface of the first valley portion 1334 is It may be formed as flat as the second length so as to be welded or brought into contact with the inner bottom of the outer bending plate 134 .

In addition, as shown in the enlarged portion of FIG. 8 (a), the mounting portion 1335 may be formed flat as much as a third length, and a mounting bush 1336 may be formed to correspond to the fixture. .

Therefore, the integrated inner bracket 133 can greatly improve the reaction force against the compressive load in the left-right direction or the front-back direction or the vertical direction by forming the internal structure by forming as many polygonal structures as possible to complicate the internal structure. In addition, Since it can be firmly fixed to the vehicle body using the mounting part 1335 and the mounting bush 1336, the strength and durability can be greatly improved by increasing the bonding force between parts.

In addition, for example, as shown in (a) of FIG. 8, the outer bending plate 134 is installed on the side member 131, and the inner support plate 132 and the integral body are applied by a roll forming method. It may be a bending plate structure formed in a shape surrounding the inner bracket 133.

Accordingly, the external bending plate 134 may protect the integral inner bracket 133 and at the same time form an external appearance of the side member 13 to absorb a primary impact or external force.

9 is a perspective view and a cross-sectional view showing the front member 11 of the vehicle battery protection device 100 of the frame type of FIG. 2 .

As shown in FIG. 9, the front member 11 has a cross section of a closed curve in which the upper and lower parts protrude outward, and the outside of the central part forms a concave part 11a, so that the upper hollow part 11b is formed inside. ) and a square tube in which a lower hollow part 11c is formed.

Therefore, the front member 11 is an integral square tube structure having a closed curve in a roll-formed cross section, and has a total thickness of 8 by the concave portion 11a, the upper hollow portion 11b, and the lower hollow portion 11c. It is intricately bent in a ruler shape, so that the reaction force against the compressive load in the left-right direction, the front-back direction, or the vertical direction can be greatly improved.

FIG. 10 is a graph showing the reaction force of the compressive load in the left and right directions of the vehicle battery protection device 100 of the frame type of FIG. 1 .

As shown in FIG. 10, when the reaction force against the compression load is measured with respect to the compression load in the left and right directions of the vehicle, the maximum compression load reaction force is as small as 280.7 kN in the "prior art", whereas in the "present invention" It was confirmed that it was improved by more than 9% compared to the prior art with 306.8kN.

FIG. 11 is a graph showing the reaction force of the compressive load in the front and rear directions of the frame-type vehicle battery protection device 100 of FIG. 1 .

As shown in FIG. 11, when the reaction force against the compression load is measured with respect to the compression load in the front and rear directions of the vehicle, the maximum compression load reaction force is as small as 211.0 kN in the "prior art", whereas in the "present invention" 222.1 kN, it was confirmed that it is improved by more than 5% compared to the prior art.

In addition, the compressive load reaction force can be greatly improved, and the weight can be reduced from a total weight of 96.7 kg to a total weight of 92.9 kg by simplifying parts of the cooling system and integrated frame described above, thereby achieving a weight saving effect.

Therefore, according to the present invention, the weight of the product can be greatly reduced by reducing the number of parts using the integrated frame 10 having a simplified structure, and the crash performance is improved, and the compression in the front and rear and left and right directions is reduced. The strength can be greatly improved, and the impact performance in the front and rear directions and the left and right directions can be improved by using the integrated inner bracket 133 bent in a zigzag shape, and the compressive strength can be greatly improved, and through this, the battery module and the vehicle safety can be greatly improved.

Here, each of the above-described members may be formed by roll-forming a steel plate or by welding roll-formed steel plates to each other, and various members formed long in the longitudinal direction in a wide variety of shapes may be applied without necessarily being limited to the drawings.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: integrated frame
10a: battery module accommodating portion
11: front member
11a: concave portion
11b: upper hollow part
11c: lower hollow part
12: rear member
13: side member
131: side member
131a: concave portion
131b: upper hollow
131c: lower hollow
132: inner support plate
133: integrated inner bracket
134: external bending plate
1331: left slope
1332: right slope
1333: 1st obstetrics
1334: first bone
1335: mounting part
1336: mounting bush
14: vertical member
14a: vertical hollow
14b: horizontal hollow
15: horizontal member
15a: square hollow part
15b: concave portion
16: reinforcing member
16a: square hollow part
20: cooling system
C: refrigerant passage
30: upper cover
40: under cover
100: frame type vehicle battery protection device

Claims (11)

An integrated frame in which a battery module accommodating portion is formed and at least one square tubular member is connected to each other;
A cooling system installed in the integrated frame to cool heat generated from the battery module;
an upper cover installed above the integrated frame to protect the battery module; and
an under cover installed below the integrated frame to protect the battery module; including,
The integrated frame,
a front member installed to correspond to the front of the vehicle;
a rear member installed to correspond to the rear of the vehicle;
A side member installed on the left or right side of the vehicle to connect one end of the front member and one end of the rear member,
The side member,
A side member made of a square pipe having an upper and lower portion protruding outward in cross section and forming a closed curve forming a concave concave portion on the outside of the central portion, and having an upper hollow portion and a lower hollow portion formed therein;
an inner support plate formed in a shape capable of covering the concave portion of the side member;
an integrated inner bracket installed on the inner support plate, erected toward the side of the vehicle, and bent in a zigzag shape as a whole along the longitudinal direction of the side member; and
an external bending plate installed on the side member and formed in a shape surrounding the inner support plate and the integrated inner bracket;
Including, frame-type vehicle battery protection device. According to claim 1,
The integrated frame,
at least one vertical member installed in a longitudinal direction between the front member and the rear member so as to respond to a front-and-back collision; and
at least one horizontal member installed in a horizontal direction between a side member installed on the left side of the vehicle and a side member installed on the right side of the vehicle so as to respond to a left-right collision;
Further comprising a frame type vehicle battery protection device. According to claim 2,
The vertical member is composed of a square tube having a shape in which the vertical hollow part and the horizontal hollow part are connected in an L shape as a whole while the cross section is formed with a closed curve as a whole by applying the roll forming method. According to claim 2,
The integrated frame,
Further comprising a reinforcing member installed below the inner side of the side member to reinforce the side member,
The reinforcing member is a frame-type vehicle battery protection device consisting of a square tube having a square hollow portion while forming a closed curve in a rectangular shape as a whole in cross section. According to claim 2,
The horizontal member,
A frame-type vehicle battery protection device comprising a square tube having a rectangular closed curve in cross section as a whole, a square hollow portion being formed, and concave portions formed on left and right side surfaces. delete According to claim 1,
The integrated inner bracket,
a plurality of first peaks formed at a first height between the left and right slopes;
a plurality of first valleys formed low to a second height between the left inclined part and the right inclined part; and
a plurality of mounting parts formed at an intermediate height between the first height and the second height in the middle of the first valley, the positions of which are fixed by fixtures vertically penetrating the side member;
Containing, frame-type vehicle battery protection device. According to claim 7,
The upper surface of the first peak is formed flat by a first length so as to be in contact with or welded to the inner surface of the outer bending plate,
The lower surface of the first valley is formed flat as much as the second length so that it can be welded or contacted with the bottom inner surface of the outer bending plate, the frame type vehicle battery protection device. According to claim 7,
The mounting part is formed as flat as a third length, and a mounting bush is formed to correspond to the fixture, a frame type vehicle battery protection device. According to claim 1,
The front member is composed of a square tube having an upper hollow part and a lower hollow part formed therein by forming a closed curve in which the upper and lower parts protrude outward and the outer side of the central part protrudes outward, and the upper hollow part and the lower hollow part are formed inside. Battery protection device for a frame type vehicle. According to claim 2,
The integrated frame is made of a material containing a steel component,
The cooling system is made of a material containing an aluminum component, a refrigerant flow path is installed therein, the integrated frame is fixed with a fixture, and the integrated frame is sealed and bonded with a sealing member. .

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