US-12620663-B2 - Battery pack mounting structure for vehicle

US12620663B2US 12620663 B2US12620663 B2US 12620663B2US-12620663-B2

Abstract

The present disclosure includes a frame side member forming a chassis frame and disposed on both sides of a vehicle in a forward-backward direction, a battery disposed to overlap inwardly from the frame side member in a horizontal direction, and a battery case surrounding the battery and coupled to the frame side member, wherein a cross section of the frame side member forms a plurality of closed spaces.

Inventors

Won Hae LEE
Seung Hak LEE
Seung Min Jeong
Nam Ho Kim
Dae Ki Jeong
Su Jin Lee
Jun Woo Park
Jeong Hoon Han
Eun Bi Kim
Sun Keun Park
Byung Joo CHUNG

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260505
Application Date: 20230510
Priority Date: 20221205

Claims (18)

1 . A battery pack mounting structure for a vehicle, the battery pack mounting structure comprising: a frame side member forming a chassis frame and disposed to extend over a predetermined distance on first and second sides of a vehicle in a forward-backward direction of the vehicle; a battery disposed to overlap inwardly from the frame side member in a horizontal direction; and a battery case surrounding the battery and coupled to the frame side member, wherein a cross-section of the frame side member forms a plurality of closed spaces, wherein the frame side member includes a frame reinforcement panel therein to form the plurality of closed spaces, wherein a locker to which a case mounting bolt for coupling the battery case to the frame side member is fastened is provided to be supported by the frame reinforcement panel, and wherein the locker is provided in a state of passing through the frame reinforcement panel.
2 . The battery pack of claim 1 , wherein the frame reinforcement panel is provided inside the frame side member to a bulkhead in the horizontal direction, and wherein the locker extends over a predetermined distance vertically so that the case mounting bolt fastened to pass through from a lower side of the frame side member is coupled to the locker.
3 . The battery pack of claim 2 , wherein the locker is disposed at a center portion of the cross-section of the frame side member.
4 . The battery pack of claim 2 , wherein the locker is provided so that a length of a portion thereof which is coupled to the case mounting bolt is 9 mm or more than 9 mm.
5 . The battery pack of claim 2 , wherein the battery case includes: an upper cover surrounding an upper side of the battery; a case lower plate supporting a lower side of the battery; and a case side unit provided between the upper cover and the case lower plate to form a side surface of the battery case, wherein the case side unit includes a vertical cross-section unit coupled between the case lower plate and the upper cover and including a cross-section which extends in a vertical direction, and wherein a horizontal cross-section unit protruding in a predetermined distance in a transverse direction of the vehicle from the vertical cross-section unit and coupled to the lower side of the frame side member.
6 . The battery pack of claim 5 , wherein the horizontal cross-section unit is provided with a sleeve contacting with the lower side of the frame side member, and wherein the case mounting bolt passes through the sleeve of the horizontal cross-section unit and is fastened to the locker of the frame side member.
7 . The battery pack of claim 6 , wherein the sleeve includes a protruding margin portion protruding upwards from the frame side member to provide a predetermined gap between the horizontal cross-section unit and the frame side member.
8 . The battery pack of claim 5 , wherein a plurality of bulkheads are formed in the vertical cross-section unit of the case side unit to divide an inside of the vertical cross-section unit into a plurality of closed spaces.
9 . The battery pack of claim 8 , wherein the plurality of bulkheads provided in the vertical cross-section are spaced from each other in the vertical direction and parallel to each other, and wherein one of the bulkheads is disposed to be aligned on a same horizontal plane as the frame reinforcement panel of the frame side member.
10 . The battery pack of claim 9 , wherein a vehicle body side chamber is disposed outside the frame side member, wherein a side chamber reinforcement panel is provided to form at least one closed space inside a cross-section of the vehicle body side chamber, and wherein at least one of portions where the side chamber reinforcement panel is horizontally disposed is aligned on the same horizontal plane as the frame reinforcement panel of the frame side member.
11 . A battery pack mounting structure for a vehicle, the battery pack mounting structure comprising: a frame side member forming a chassis frame and disposed to extend over a predetermined distance on first and second sides of a vehicle in a forward-backward direction of the vehicle; a battery disposed to overlap inwardly from the frame side member in a horizontal direction; and a case side unit coupled to a lower side of the frame side member and including an “L” shaped cross-section when viewed on a side surface of a battery case surrounding the battery, wherein a frame reinforcement panel forming a bulkhead in the horizontal direction is provided inside the frame side member, and wherein the frame side member includes a closed cross-section with an upper horizontal unit and a lower horizontal unit parallel to an upper side and a lower side of the frame reinforcement panel, respectively, and wherein the lower horizontal unit and the frame reinforcement panel are supported with a locker coupled to a case mounting bolt fastened through the case side unit.
12 . The battery pack of claim 11 , wherein the locker includes a lower flange coupled to an upper side of the lower horizontal unit of the frame side member, and an upper side of the locker is fixed by passing through the frame reinforcement panel.
13 . The battery pack of claim 12 , wherein the locker is disposed at a center portion of the cross-section of the frame side member.
14 . The battery pack of claim 12 , wherein the case side unit includes: a vertical cross-section unit between an upper cover surrounding an upper side of the battery and a case lower plate supporting a lower side of the battery, and coupled to form a side surface of the battery case as a predetermined cross-section in a vertical direction, and a horizontal cross-section unit protruding over a predetermined distance in a transverse direction of the vehicle from the vertical cross-section unit and coupled to the frame side member.
15 . The battery pack of claim 14 , wherein the vertical cross-section unit is provided with a plurality of bulkheads spaced from each other in the vertical direction, and one of the bulkheads is disposed to be aligned on a same horizontal plane as the frame reinforcement panel of the frame side member.
16 . The battery pack of claim 14 , wherein a vehicle body side chamber is disposed outside the frame side member, wherein a side chamber reinforcement panel is provided inside a cross-section of the vehicle body side chamber, and wherein at least one of portions where the side chamber reinforcement panel is horizontally disposed is aligned on a same horizontal plane as one of the frame reinforcement panel of the frame side member and the bulkhead of a vertical cross-section unit.
17 . The battery pack of claim 14 , wherein the horizontal cross-section unit is provided with a sleeve contacting with the lower side of the frame side member, and wherein the sleeve is provided on the horizontal cross-section unit and contacts with the lower side of the frame side member.
18 . The battery pack of claim 17 , wherein the sleeve includes a protruding margin portion protruding upwards from the frame side member to provide a predetermined gap between the horizontal cross-section unit and the frame side member.

Description

CROSS REFERENCE TO RELATED APPLICATION The present application claims priority to Korean Patent Application No. 10-2022-0167906 filed on Dec. 5, 2022, the entire contents of which is incorporated herein for all purposes by this reference. BACKGROUND OF THE PRESENT DISCLOSURE Field of the Present Disclosure The present disclosure relates to a technology for mounting a battery pack required for an electric vehicle or the like on a vehicle. Description of Related Art A vehicle with a BODY ON FRAME structure means a vehicle having a structure in which a vehicle body is mounted on an upper side of a chassis frame, in particular, using chassis frames with chassis components required to drive the vehicle for common use, and considering to be easily mounted by changing the vehicle body mounted on an upper side thereof into various states desired by a customer. When an electric vehicle has the BODY ON FRAME structure as described above, a battery pack is preferably provided on the chassis frame side. The battery pack generally includes a battery module including battery cells, and a battery case surrounding, protecting, and supporting a plurality of battery modules. Hereinafter, simply ‘battery’ refers to a battery cell or a battery module in the battery case. The information included in this Background of the present disclosure is only for enhancement of understanding of the general background of the present disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. BRIEF SUMMARY Various aspects of the present disclosure are directed to providing a battery pack mounting structure for a vehicle to effectively protect a battery required for driving a vehicle, while ensuring an ease of getting on or off of a passenger and maximizing a space in the passenger's room in a vehicle with a BODY ON FRAME structure, securing safety of a mounted battery and greatly increasing a commercial property of the vehicle. The battery pack mounting structure for a vehicle according to an exemplary embodiment of the present disclosure to achieve the above object includes a frame side member forming a chassis frame and disposed to extend over a long distance on both sides of a vehicle in a forward-backward direction, a battery disposed to overlap inwardly from the frame side member in a horizontal direction, and a battery case surrounding the battery and coupled to the frame side member, wherein a cross-section of the frame side member forms a plurality of closed spaces. The frame side member may have a frame reinforcement panel therein to form the plurality of closed spaces, and a locker to which a case mounting bolt for coupling the battery case to the frame side member is fastened may be provided to be supported by the frame reinforcement panel. The frame reinforcement panel may be provided inside the frame side member to form a bulkhead in a horizontal direction, and the locker may be provided in a state of passing through the frame reinforcement panel to extend over a long distance vertically so that the case mounting bolt fastened to pass through from a lower side of the frame side member is coupled to the locker in a bolt-and-nut fastening manner. The locker may be disposed at the center portion of the cross-section of the frame side member. The locker may be provided so that a length of a portion thereof which is coupled to the case mounting bolt in a bolt-and-nut manner is 9 mm or more than 9 mm. The battery case may include an upper cover surrounding an upper side of the battery, a case lower plate supporting a lower side of the battery, and a case side unit provided between the upper cover and the case lower plate to form a side surface of the battery case, wherein the case side unit may include a vertical cross-section unit is between the upper cover surrounding the upper side of the battery and the case lower plate supporting the lower side of the battery and coupled to form a side surface of the battery case as a long cross-section in the vertical direction, and a horizontal cross-section unit protruding in a predetermined distance in a transverse direction of the vehicle from the vertical cross-section unit and coupled to the lower side of the frame side member. The horizontal cross-section unit may be provided with a sleeve contacting with the lower side of the frame side member, and the case mounting bolt may pass through a sleeve of the horizontal cross-section unit and may fasten to the locker of the frame side member. The plurality of bulkheads may be formed in the vertical cross-section unit of the case side unit to divide inside of the vertical cross-section unit into a plurality of closed spaces. The plurality of bulkheads provided in the vertical cross-section may be spaced from each other in the vertical direction and parallel to each other, and one of the bulkheads may be disposed to be aligned on a same h