Battery case for electric vehicle

Abstract

The present invention discloses an invention for a battery case for an electric vehicle that improves structural durability and safety by reinforcing the rigidity of an extended cover panel, which is formed extending perpendicularly to both sides in the width direction of a cover plate, through a rigidity reinforcing member. The disclosed battery case for an electric vehicle is characterized by comprising: a cover plate covering a battery module; an extension cover panel extending perpendicularly on each side in the width direction of the cover plate to cover the perimeter of the battery module; a connecting cover panel supportedly connected to the cover plate and the extension cover panel to cover the perimeter of the battery module so as to be disposed on both sides in the length direction of the cover plate; and a rigidity reinforcing member fixedly mounted on the extension cover panel to reinforce the rigidity of the extension cover panel.

Description

Technology Field

[0001] The present invention relates to a battery case for an electric vehicle, and more specifically, to a battery case for an electric vehicle that improves structural durability and safety by reinforcing the rigidity of an extended cover panel, which is formed extending perpendicularly to both sides in the width direction of a cover plate, through a rigidity reinforcing member. Background Technology

[0003] With the steady development of electric vehicles driven by recent environmental pollution issues and the development of alternative energy, the demand for high-capacity batteries for vehicles is rapidly increasing.

[0004] Accordingly, many manufacturers have recently been developing and launching PHEV (Plug-in Hybrid Electric Vehicle) systems alongside HEV (Hybrid Electric Vehicle). Unlike conventional HEVs, PHEVs are equipped with high-capacity and high-performance batteries and can be charged outside the vehicle using electricity from homes or buildings.

[0005] Battery modules used in these electric and hybrid vehicles frequently utilize pouch-type battery cell units, in which a single battery cell is housed within a pouch. Here, multiple battery cell units are accommodated by stacking them inside a single battery pack case, and the number of battery cell units is determined according to the required power size.

[0006] Such battery modules comprise a case, battery cells disposed inside the case, and end plates coupled to both ends of the case. In this case, the end plates are recently being developed with a structure in which synthetic resin and metal are interconnected.

[0007] However, the end plate of a battery module according to the prior art has a problem in that the connection between the synthetic resin plate and the metal plate is not robust, and the overall durability is reduced because a separate jig is attached to the synthetic resin plate.

[0008] Therefore, there is a need to improve this.

[0009] A related background technology is Korean Registered Patent Publication No. 10-2729391 (Registered Nov. 08, 2024, Title: Battery Module Case for Electric Vehicles). The problem to be solved

[0011] The present invention was created in response to the aforementioned necessity, and aims to provide a battery case for an electric vehicle that improves structural durability and safety by reinforcing the rigidity of an extended cover panel, which is formed extending perpendicularly on both sides of the cover plate in the width direction, through a rigidity reinforcing member. means of solving the problem

[0013] To achieve the above objective, the battery case for an electric vehicle according to the present invention is characterized by comprising: a cover plate covering a battery module; an extension cover panel extending perpendicularly on each side in the width direction of the cover plate to cover the perimeter of the battery module; a connecting cover panel supportably connected to the cover plate and the extension cover panel to cover the perimeter of the battery module so as to be disposed on both sides in the length direction of the cover plate; and a rigidity reinforcing member fixedly mounted on the extension cover panel to reinforce the rigidity of the extension cover panel.

[0014] The above rigidity reinforcing member is characterized by comprising an insulating panel disposed to be in contact with the inner surface of the extension cover panel, a finishing panel disposed to be in contact with the periphery of the extension cover panel, and a position fixing connecting member that connects the insulating panel and the finishing panel to the extension cover panel so that the insulating panel and the finishing panel are fixed in position while in contact with the extension cover panel.

[0015] The above position-fixing connecting portion is characterized by including a plurality of through-hole portions formed through a set position of the extension cover panel, a plurality of communication hole portions formed through the finishing panel to communicate with the through-hole portions, and a fusion catch projection provided on the insulating panel that is inserted through the through-hole portions and the communication hole portions, and then deformed by heat to catch around the communication hole portions.

[0016] The above-described finishing panel supports a battery module so as to be mounted by means of a mounting support member, and the mounting support member is characterized by including a plurality of support straps spaced apart between the finishing panels to support the battery module, and an extension joining member formed to extend orthogonally on each side in the longitudinal direction of the support straps and joined to the periphery of the finishing panel.

[0017] One of the above-mentioned connecting cover panels is provided with a support bracket, and another of the above-mentioned connecting cover panels is provided with a mounting bracket capable of being mounted on the support bracket of the other connecting cover panel. Effects of the invention

[0019] According to the battery case for an electric vehicle of the present invention, the extended cover panels formed extending perpendicularly on both sides in the width direction of the cover plate have their rigidity reinforced by a rigidity reinforcing member, thereby having the effect of improving structural durability and safety. Brief explanation of the drawing

[0021] FIG. 1 is a perspective view illustrating a battery case for an electric vehicle according to one embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating a battery case for an electric vehicle according to one embodiment of the present invention. FIG. 3 is a bottom exploded perspective view illustrating a battery case for an electric vehicle according to one embodiment of the present invention. FIG. 4 is a side cross-sectional view illustrating a battery case for an electric vehicle according to one embodiment of the present invention. FIG. 5 is an operational diagram illustrating the operating state of a connection cover panel in a battery case for an electric vehicle according to one embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, a preferred embodiment of a battery case for an electric vehicle according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation.

[0023] Furthermore, the terms described below are defined in consideration of their functions in the present invention, and these may vary depending on the intent or practice of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0025] FIG. 1 is a perspective view illustrating a battery case for an electric vehicle according to an embodiment of the present invention, FIG. 2 is an exploded perspective view illustrating a battery case for an electric vehicle according to an embodiment of the present invention, FIG. 3 is a bottom exploded perspective view illustrating a battery case for an electric vehicle according to an embodiment of the present invention, FIG. 4 is a side cross-sectional view illustrating a battery case for an electric vehicle according to an embodiment of the present invention, and FIG. 5 is an operation diagram illustrating the operating state of a connecting cover panel in a battery case for an electric vehicle according to an embodiment of the present invention.

[0027] As illustrated in FIGS. 1 to 5, a battery case for an electric vehicle according to one embodiment of the present invention includes a cover plate (10), an extension cover panel (20), a connecting cover panel (30), and a rigidity reinforcing part (40).

[0028] The cover plate (10) covers the upper side of the battery module. This cover plate (10) is press-formed from a rectangular metal material and serves to provide a space for installing the extension cover panel (20) and the connecting cover panel (30).

[0029] Additionally, the extension cover panel (20) is formed to extend perpendicularly on each side in the width direction of the cover plate (10) to cover the perimeter of the battery module (not shown).

[0030] These extension cover panels (20) cover a portion positioned at the edge along the longitudinal direction of the cover plate (10) in the battery module, while simultaneously providing a space in which a rigidity reinforcing member (40) can be fixedly installed.

[0031] Additionally, the connecting cover panel (30) is configured to be supportedly connected to the cover plate (10) and the extension cover panel (20) so as to be positioned on each side in the longitudinal direction of the cover plate (10), thereby covering the perimeter of the battery module.

[0032] These connecting cover panels (30) cover the portions placed along the edges along the width direction of the cover plate (10) in the battery module.

[0033] At this time, the extension cover panel (20) is provided with a welding support member (21) on each side in the longitudinal direction, and the connecting cover panel (30) has a first welding fixing member (31) formed extending on both sides in the longitudinal direction that is fixedly connected by welding to the outer surface of the welding support member (21), and a second welding fixing member (32) formed extending on one side in the width direction that is fixed by welding to the outer surface of the cover plate (10).

[0034] Additionally, one of the connecting cover panels (30) may be provided with a plurality of support brackets (33), and another of the connecting cover panels (30) may be provided with a plurality of mounting brackets (34) that can be mounted on the support brackets (33) of the other connecting cover panel (30).

[0035] At this time, a first coupling guide hole (33a) is formed through the support bracket (33), and a second coupling guide hole (34a) that communicates with the first coupling guide hole (33a) when seated on the support bracket (33) may be formed through the seating bracket (34).

[0036] That is, the support bracket (33) can be connected to the mounting bracket (34) of another connecting cover panel (30) through the fastening of a bolt and a nut, and the mounting bracket (34) can be connected to the support bracket (33) of another connecting cover panel (30) through the fastening of a bolt and a nut.

[0037] Meanwhile, the rigidity reinforcement member (40) is configured to be fixedly mounted on the extension cover panel (20) to reinforce the rigidity of the extension cover panel (20).

[0038] Specifically, the rigidity reinforcement member (40) may include an insulating panel (41) positioned to be in contact with the inner surface of the extension cover panel (20), a finishing panel (42) positioned to be in contact with the periphery of the extension cover panel (20), and a position fixing connection member (43) that connects the insulating panel (41) and the finishing panel (42) to the extension cover panel (20) so that the insulating panel (41) and the finishing panel (42) are fixed in position while in contact with the extension cover panel (20).

[0039] Here, the insulating panel (41) is preferably molded from an insulating plastic material, and the finishing panel (42) is preferably press-formed from a metal material.

[0040] At this time, the finishing panel (42) can support the battery module so that it can be seated by the seating support member (50). The seating support member (50) includes a plurality of support straps (51) that are spaced apart and support the battery module between the finishing panels (42), and an extension joining member (52) that is formed to extend orthogonally on each side of the support strap (51) in the longitudinal direction and is joined to the periphery of the finishing panel (42).

[0041] Accordingly, the support strap (51) supports the battery module while maintaining the end panel (42) at a set interval through the extension joint (52), thereby limiting the deformation of the extension cover panel (20) due to the springback phenomenon.

[0042] In addition, the position-fixing connection part (43) may include a plurality of through-hole portions (43a) formed through a set position of the extension cover panel (20), a plurality of communication hole portions (43b) formed through a finishing panel (42) to communicate with the through-hole portions (43a), and a compression catch projection (43c) provided in the insulation panel (41) and compressed to catch around the communication hole portions (43b) after being axially inserted into the through-hole portions (43a) and the communication hole portions (43b).

[0043] That is, after inserting the compression catch projection (43c) into the through hole portion (43a) and the communication hole portion (43b), if the end of the fusion catch projection (43c) protruding from the communication hole portion (43b) is compressed by thermal deformation, the compression catch projection (43c) is caught around the communication hole portion (43b), so that the insulation panel (41) and the finishing panel (42) can be fixed in position while in close contact with the extension cover panel (20).

[0045] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom.

[0046] Therefore, the true technical scope of protection of the present invention should be determined by the patent claims. Explanation of the symbols

[0048] 10: Cover plate 20: Extension cover panel 21: Welding support 30: Connecting cover panel 31: 1st weld fixing part 32: 2nd weld fixing part 33: Support bracket 34: Mounting bracket 40: Rigidity reinforcement section 41: Insulation panel 42: Finishing panel 43: Position fixing connector 50: Seating support part 51: Support strap 52: Extension joint

Claims

Claim 1 A cover plate covering a battery module; an extension cover panel extending perpendicularly on each side in the width direction of the cover plate to cover the perimeter of the battery module; a connecting cover panel supportedly connected to the cover plate and the extension cover panel to cover the perimeter of the battery module so as to be positioned on both sides in the length direction of the cover plate; and a rigidity reinforcing member fixedly mounted on the extension cover panel to reinforce the rigidity of the extension cover panel.The rigidity reinforcing member includes an insulating panel disposed to be in contact with the inner surface of the extension cover panel, a finishing panel disposed to be in contact with the periphery surface of the extension cover panel, and a position fixing connecting member that connects the insulating panel and the finishing panel to the extension cover panel so that the insulating panel and the finishing panel are fixed in position while in contact with the extension cover panel; the position fixing connecting member includes a plurality of through-hole portions formed through a set position of the extension cover panel, a plurality of communication-hole portions formed through the finishing panel to communicate with the through-hole portions, and a fusion-locking projection provided on the insulating panel to be inserted axially into the through-hole portions and the communication-hole portions, and then deformed by heat to catch around the communication-hole portions; the finishing panel supports the battery module so as to be seated by a seating support member, and the seating support member includes a plurality of support straps spaced apart between the finishing panels to support the battery module, and each extending orthogonally on both sides in the longitudinal direction of the support straps A battery case for an electric vehicle, comprising an extension joint that is joined to the periphery of a finishing panel, wherein one of the connecting cover panels is provided with a support bracket, and another of the connecting cover panels is provided with a mounting bracket capable of being seated on the support bracket of the other connecting cover panel, wherein the support strap limits springback deformation of the connecting cover panel when the extension joint is joined to the finishing panel, wherein the extension cover panel is provided with welding support members on both sides in the longitudinal direction, and wherein the connecting cover panel has a first welding fixing member extended on both sides in the longitudinal direction that is fixedly connected by welding to the outer surface of the welding support member, and a second welding fixing member extended on one side in the width direction that is fixed by welding to the outer surface of the cover plate. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete

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