Edge beam structure, box frame and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a boundary beam structure, a box frame and a battery pack. The boundary beam structure comprises a boundary beam and a mounting piece. And the mounting piece is connected with the edge beam. The mounting piece comprises at least two mounting sheets which are overlapped with each other. And the mounting sheets are respectively connected to different positions of the edge beam in the height direction. Therefore, the mounting piece can form a plurality of connecting point positions in the height direction of the edge beam, so that the connecting strength between the mounting piece and the edge beam is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a side beam structure, a box frame, and a battery pack. Background Technology

[0002] In related technologies, the side beams of the battery box typically require mounting brackets to secure the battery box to the vehicle body. However, the current mounting brackets are positioned in a concentrated manner, resulting in insufficient connection strength between the brackets and the side beams. This could lead to the brackets detaching from the side beams, posing a safety hazard. Utility Model Content

[0003] The embodiments of this utility model provide a side beam structure, a box frame, and a battery pack, which can improve the connection strength between the mounting component and the side beam and improve the connection stability of the mounting component.

[0004] In a first aspect, embodiments of the present invention provide a side beam structure, comprising:

[0005] Edge beam;

[0006] A mounting bracket is connected to the side beam. The mounting bracket includes at least two overlapping mounting plates, wherein each mounting plate is connected to a different position in the height direction of the side beam.

[0007] In one embodiment, the side beam is constructed with at least two mounting areas spaced apart along its height, and each mounting plate is connected to one of the mounting areas.

[0008] In one embodiment, the side beam is configured with a connecting portion extending toward the mounting member. The at least two mounting areas include: a first connecting area and a second connecting area located on the connecting portion, and a third connecting area located on the side beam. The first connecting area and the second connecting area are respectively located on opposite sides of the connecting portion in the height direction. The third connecting area is spaced apart from the connecting portion along the height direction of the side beam. The at least two mounting pieces include a first mounting piece, a second mounting piece, and a third mounting piece stacked sequentially. The first mounting piece is connected to the first connecting area, the second mounting piece is connected to the second connecting area, and the third mounting piece is connected to the third connecting area.

[0009] In one embodiment, a sleeve is connected between the first mounting plate and the third mounting plate, the second mounting plate is provided with a mounting hole, and the sleeve passes through the mounting hole, wherein the sleeve is configured to be connected to the vehicle body by a fastener.

[0010] In one embodiment, the side beam is a roll-formed steel side beam, and the mounting component is a stamped sheet metal mounting component.

[0011] Secondly, embodiments of this utility model provide a box frame, comprising:

[0012] The frame includes at least three beams, at least one of which adopts the edge beam structure as described above;

[0013] A reinforcing beam assembly is disposed within the frame and is connected to the beam body.

[0014] In one embodiment, the border includes:

[0015] The first beam pair includes two spaced-apart side beams, at least one of which adopts the edge beam structure as described above;

[0016] The second beam pair includes two spaced-apart end beams, and the two side beams and the two end beams together form the frame.

[0017] In one embodiment, the reinforcing beam assembly includes:

[0018] The first reinforcing beam is provided at least two at intervals along the first direction, and the two ends of the first reinforcing beam are respectively connected to the two side beams;

[0019] The second reinforcing beam is connected at an angle to the first reinforcing beam, wherein a second reinforcing beam is provided between every two adjacent first reinforcing beams.

[0020] In one embodiment, the side beam facing the first reinforcing beam is provided with a support member, the support member having a groove into which the end of the first reinforcing beam is engaged.

[0021] In one embodiment, an adhesive layer is provided between the first reinforcing beam and the groove wall of the slot, and / or the first reinforcing beam is connected to the support member by fasteners.

[0022] In one embodiment, at least a portion of the connection between the first reinforcing beam and the second reinforcing beam has a recessed area, and a connector is connected within the recessed area, the connector being connected to both the first reinforcing beam and the second reinforcing beam.

[0023] In one embodiment, a mounting beam is connected between one of the end beams and the first reinforcing beam located at the edge, the mounting beam being configured to connect electrical components.

[0024] In one embodiment, the first beam pair, the second beam pair, and the reinforcing beam assembly are made of dissimilar materials.

[0025] In one embodiment, the first beam pair is a roll-formed steel beam, the second beam pair is a stamped sheet metal beam, and the reinforcing beam assembly is an aluminum extrusion reinforcing beam.

[0026] Thirdly, embodiments of this utility model provide a battery pack, including a battery box, wherein the battery box adopts the box frame as described above.

[0027] The beneficial effects of the embodiments of this utility model are as follows:

[0028] In embodiments of this invention, the mounting component comprises at least two overlapping mounting plates, with each mounting plate connected to a different position along the height of the side beam. This allows the mounting component to form multiple connection points along the height of the side beam, thereby increasing the connection strength between the mounting component and the side beam. Furthermore, the fact that a mounting component is composed of multiple overlapping mounting plates also enhances the structural strength of the mounting component itself, improving the safety and reliability of the side beam structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the side beam provided in an embodiment of the present utility model;

[0031] Figure 2 yes Figure 1 Exploded view;

[0032] Figure 3 yes Figure 1 The main view;

[0033] Figure 4 This is a schematic diagram of the structure of the box frame provided in this embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the side beam provided in an embodiment of the present invention;

[0035] Figure 6 This is an exploded view of the reinforcing beam assembly provided in this embodiment of the utility model;

[0036] Figure 7 This is a structural schematic diagram of the reinforcing beam assembly and connecting beam provided in an embodiment of this utility model.

[0037] Figure label:

[0038] 10-Side beam, 110-Connecting part, 120-First connecting area, 130-Second connecting area, 140-Third connecting area, 20-Hanger piece, 210-First hanging piece, 220-Second hanging piece, 230-Third hanging piece, 240-Mounting hole, 30-Frame, 310-Side beam, 320-End beam, 330-Support piece, 340-Slot, 40-Reinforcing beam assembly, 410-First reinforcing beam, 420-Second reinforcing beam, 430-Recessed area, 440-Notch, 50-Connecting piece, 60-Mounting beam, 610-Connecting lug. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0040] like Figures 1 to 3 As shown, this application embodiment provides a side beam structure. The side beam structure includes a side beam 10 and a mounting member 20. The mounting member 20 is connected to the side beam 10. The mounting member 20 includes at least two overlapping mounting plates. Each mounting plate is connected to a different position in the height direction of the side beam 10.

[0041] In this embodiment, the mounting member 20 includes at least two overlapping mounting plates, with each mounting plate connected to a different position along the height of the side beam 10. This allows the mounting member 20 to form multiple connection points along the height of the side beam 10, thereby increasing the connection strength between the mounting member 20 and the side beam 10. Furthermore, since a mounting member 20 is composed of multiple overlapping mounting plates, the structural strength of the mounting member 20 itself is also enhanced, improving the safety and reliability of the side beam structure.

[0042] It is understood that the mounting component 20 extends along the length of the side beam 10. At each position along the length of the side beam 10, there are at least two connection points between the mounting component 20 and the side beam 10, thereby improving the connection strength between the mounting component 20 and the side beam 10.

[0043] In some embodiments, the side beam 10 is configured with at least two mounting areas spaced apart along its height direction, and each mounting plate is connected to a corresponding mounting area.

[0044] It is understandable that by forming multiple installation areas spaced apart along the height direction on the side beam 10, each mounting piece is connected to a corresponding installation area, so that there are multiple connection points spaced apart along the height direction between the mounting piece 20 and the side beam 10, thereby improving the connection strength between the mounting piece 20 and the side beam 10.

[0045] In some embodiments, the side beam 10 is configured with a connecting portion 110 extending toward the mounting member 20. At least two mounting areas include: a first connecting area 120 and a second connecting area 130 located on the connecting portion 110, and a third connecting area 140 located on the side beam 10. The first connecting area 120 and the second connecting area 130 are located on opposite sides of the connecting portion 110 in the height direction. The third connecting area 140 is spaced apart from the connecting portion 110 along the height direction of the side beam 10. At least two mounting pieces include a first mounting piece 210, a second mounting piece 220, and a third mounting piece 230 stacked sequentially. The first mounting piece 210 is connected to the first connecting area 120. The second mounting piece 220 is connected to the second connecting area 130, and the third mounting piece 230 is connected to the third connecting area 140.

[0046] It is understood that the lower and upper surfaces of the connecting part 110 can respectively form a first connecting area 120 and a second connecting area 130, and the area of ​​the side beam 10 above the connecting part 110 can form a third connecting area 140. The first mounting plate 210, the second mounting plate 220, and the third mounting plate 230 are respectively connected to the first connecting area 120, the second connecting area 130, and the third connecting area 140, thereby creating three connection positions between the mounting member 20 and the side beam 10 in the height direction, ensuring the reliability of the connection between the mounting member 20 and the side beam 10, and ensuring the connection strength between the mounting member 20 and the side beam 10.

[0047] In some embodiments, the first mounting plate 210 can be connected to the first connection area 120 by plug welding. The second mounting plate 220 can also be connected to the second connection area 130 by plug welding. The third mounting plate 230 can be connected to the third connection area 140 by laser welding.

[0048] In some embodiments, the first mounting plate 210 can be connected to the second mounting plate 220 by spot welding. The third mounting plate 230 can be connected to both the first mounting plate 210 and the second mounting plate 220 by spot welding.

[0049] In some embodiments, the connecting portion 110 is integrally formed with the side beam 10. The side beam 10 can be a hollow beam of H-shaped rolled steel, and the middle of the side beam 10 has a reinforcing rib to strengthen the structure. The connecting portion 110 integrally formed with the side beam 10 can also be a hollow beam structure.

[0050] like Figure 1 and Figure 2 As shown, both the first mounting plate 210 and the second mounting plate 220 have downwardly convex regions, while the third mounting plate 230 has an upwardly convex region. The downward convexity of the first mounting plate 210 is greater than that of the second mounting plate 220. This creates cavities between the first and second mounting plates 210, and also between the second and third mounting plates 220. Consequently, the mounting component 20 formed by the first, second, and third mounting plates 210 possesses good structural strength, preventing the mounting component 20 from shaking vertically.

[0051] In some embodiments, a sleeve is connected between the first mounting plate 210 and the third mounting plate 230. The second mounting plate 220 is configured with a mounting hole 240. The sleeve passes through the mounting hole 240. The sleeve is configured to be connected to the vehicle body via fasteners.

[0052] Understandably, by installing a sleeve between the first mounting plate 210 and the third mounting plate 230, the sleeve can be connected to the vehicle body via fasteners, thereby achieving the connection between the mount 20 and the vehicle body. Since the second mounting plate 220 is located between the first mounting plate 210 and the third mounting plate 230, mounting holes 240 need to be provided on the second mounting plate 220 to allow the sleeve to pass through, preventing interference during sleeve installation. Furthermore, the sleeve also enhances the connection strength of the first mounting plate 210, the second mounting plate 220, and the third mounting plate 230, thus giving the mount 20 good structural strength and preventing it from shaking up and down.

[0053] In some embodiments, the sleeve is configured as a cylindrical structure, and the mounting hole 240 is a circular hole. Fasteners can pass through the sleeve and connect to the vehicle body to achieve the connection between the mounting plate and the vehicle body. The first mounting plate 210 and the third mounting plate 230 are respectively provided with connecting holes, which communicate with the channel of the sleeve and are aligned with the mounting hole 240. Therefore, the sleeve can be inserted between the first mounting plate 210 and the third mounting plate 230 from either connecting hole, and the fastener can pass through one connecting hole into the sleeve and out through the other connecting hole, thereby achieving the connection between the sleeve and the vehicle body using fasteners.

[0054] In some embodiments, the sleeve can be welded to the first mounting plate 210 and the third mounting plate 230 by laser welding.

[0055] In some embodiments, a skid plate connector may also be installed on the side of the first mounting plate 210 away from the side beam 10. The skid plate connector is used to connect body skid plates, underbody skid plates, etc. The skid plate connector can be fixed to the first mounting plate 210 by spot welding.

[0056] In some embodiments, the side beam 10 is a roll-formed steel side beam 10. The mounting component 20 is a stamped sheet metal mounting component 20.

[0057] Side beam 10 is made of H-shaped roll-formed steel, and the thickness of the roll-formed steel can be set to 1.2 mm. The roll-formed steel can be high-strength steel such as HC420 / 780TR to give side beam 10 good rigidity and strength. Side beam 10 extends along the length of the vehicle and is located on one side of the vehicle's width. Therefore, the H-shaped roll-formed steel side beam 10 can meet the requirements of lateral compression of the battery pack and overall vehicle side-impact safety.

[0058] The mounting component 20 is formed by bending stamped sheet metal, and the thickness of the stamped sheet metal can be set to 1.2 mm. The stamped sheet metal can be made of high-strength steel HC340 / 590DP. Since the mounting component 20 can be welded from the first mounting piece 210, the second mounting piece 220, and the third mounting piece 230, the stamped sheet metal mounting component 20 also has sufficient rigidity and strength to meet the battery pack load-bearing requirements.

[0059] like Figures 4 to 7 As shown in the illustration, this application also provides a box frame. The box frame includes a side frame 30 and a reinforcing beam assembly 40. The side frame 30 includes at least three beams. At least one beam adopts the side beam structure as described in the previous embodiments. The reinforcing beam assembly 40 is disposed within the side frame 30. The reinforcing beam assembly 40 is connected to the beams.

[0060] In this embodiment, the mounting member 20 includes at least two overlapping mounting plates, with each mounting plate connected to a different position along the height of the side beam 10. This allows the mounting member 20 to form multiple connection points along the height of the side beam 10, thereby increasing the connection strength between the mounting member 20 and the side beam 10. Furthermore, since a mounting member 20 is composed of multiple overlapping mounting plates, the structural strength of the mounting member 20 itself is also enhanced, improving the safety and reliability of the side beam structure.

[0061] Understandably, the reinforcing beam assembly 40 is connected to the interior of the frame 30, thereby structurally strengthening the frame 30 and improving its overall strength. The reinforcing beam assembly 40 can also be connected to the liquid-cooled base plate and bottom protective plate of the battery box, thus integrating the box frame with these components. Specifically, the reinforcing beam assembly 40 can be connected to the liquid-cooled base plate and bottom protective plate using fasteners.

[0062] In some embodiments, at least three beams are welded together to form a frame 30. Typically, the frame 30 is square, consisting of four welded beams. Of course, different frame formations can be used to meet different application requirements, and the number of beams can be selected accordingly. The length, shape, material, and other parameters of each beam can be the same or different.

[0063] like Figure 4 As shown, in some embodiments, the frame 30 includes a first beam pair and a second beam pair. The first beam pair includes two spaced-apart side beams 310. At least one side beam 310 adopts the edge beam structure as described in the previous embodiments. The second beam pair includes two spaced-apart end beams 320. The two side beams 310 and the two end beams 320 enclose and form the frame 30.

[0064] It is understood that a square frame 30 is formed by the first beam pair and the second beam pair. The two side beams 310 of the first beam pair are parallel to each other, and the two end beams 320 of the second beam pair are parallel to each other.

[0065] After the box frame is applied to the vehicle, the side beams 310 extend along the length of the vehicle, and the two side beams 310 are spaced apart along the width of the vehicle. The end beams 320 extend along the width of the vehicle, and the two end beams 320 are spaced apart along the width of the vehicle.

[0066] In some embodiments, the two side beams 310 have the same structure, and both side beams 310 adopt the edge beam structure as described in the foregoing embodiments. Alternatively, the two side beams 310 have different structures, with only one side beam 310 adopting the edge beam structure as described in the foregoing embodiments.

[0067] In some embodiments, the two end beams 320 have the same structure. Alternatively, the two end beams 320 have different structures. Figure 4 As shown, one end beam 320 is a bent beam, and the other end beam 320 is a straight beam.

[0068] In some embodiments, the reinforcing beam assembly 40 includes a first reinforcing beam 410 and a second reinforcing beam 420. At least two first reinforcing beams 410 are spaced apart along a first direction. The two ends of each first reinforcing beam 410 are connected to two side beams 310. The second reinforcing beam 420 is connected to the first reinforcing beam 410 at an angle. A second reinforcing beam 420 is provided between every two adjacent first reinforcing beams 410.

[0069] It is understood that the angled first reinforcing beam 410 and second reinforcing beam 420 can structurally reinforce the interior of the frame 30 in two directions to improve the structural strength of the frame 30. Specifically, the first reinforcing beam 410 and the second reinforcing beam 420 are connected perpendicularly. Alternatively, the first reinforcing beam 410 and the second reinforcing beam 420 are connected at an acute angle. Or, the first reinforcing beam 410 and the second reinforcing beam 420 are connected at an obtuse angle.

[0070] In some embodiments, the first reinforcing beam 410 and the second reinforcing beam 420 may be welded together. For example, the first reinforcing beam 410 and the second reinforcing beam 420 may be connected using a TIG welding process (Tungsten Inert Gas Welding).

[0071] like Figure 6 and Figure 7 As shown, in some embodiments, three first reinforcing beams 410 and two second reinforcing beams 420 are provided. This forms a king-shaped reinforcing beam assembly 40. After the king-shaped reinforcing beam assembly 40 is disposed inside the frame 30, it forms a grid-like structure, thereby creating four mounting areas. These four mounting areas can be used to place the battery module. The battery module can abut against the perimeter of the mounting areas (including the first reinforcing beams 410, second reinforcing beams 420, side beams 310, and end beams 320), thereby being constrained by the beams to prevent the battery module from expanding and deforming.

[0072] like Figure 4 and Figure 5 As shown, in some embodiments, the side beam 310 has a support member 330 on the side facing the first reinforcing beam 410. The support member 330 has a groove 340. The end of the first reinforcing beam 410 is engaged in the groove 340.

[0073] It is understandable that since the side beam 310 and the first reinforcing beam 410 are made of dissimilar materials, they cannot be connected by welding. Therefore, a support member 330 is constructed on the side beam 310, and a groove 340 is formed on the support member 330, allowing the end of the first reinforcing beam 410 to engage within the groove 340, thereby achieving the connection between the side beam 310 and the first reinforcing beam 410.

[0074] like Figure 5 As shown, the support member 330 can be U-shaped. The width of the slot 340 formed by the support member 330 is the same as the width of the first reinforcing beam 410, so that the first reinforcing beam 410 can be engaged in the slot 340. Figure 7As shown, a notch 440 may be provided on the lower side of the end of the first reinforcing beam 410 to form a stepped structure at the end of the first reinforcing beam 410, which facilitates the quick snap-fit ​​positioning of the first reinforcing beam 410. Furthermore, after the stepped structure is engaged with the support member 330, the upper side of the first reinforcing beam 410 can be made basically flush with the upper side of the side beam 310.

[0075] In some embodiments, the support member 330 may include a first U-shaped member that fits against the side beam 310, and a second U-shaped member that is perpendicularly connected to the first U-shaped member. The first U-shaped member and the second U-shaped member are welded together to facilitate the forming of the support member 330. The support member 330 is welded to the side beam 310, and the support member 330 and the side beam 310 are made of the same material.

[0076] In some embodiments, an adhesive layer is provided between the first reinforcing beam 410 and the groove wall of the slot 340. And / or, the first reinforcing beam 410 is connected to the support member 330 by fasteners.

[0077] Understandably, the adhesive layer can bond the first reinforcing beam 410 and the support member 330 together, thereby achieving a reliable connection between the reinforcing beam and the support member 330. Fasteners can also ensure a reliable connection between the first reinforcing beam 410 and the support member 330.

[0078] For example, after the end of the first reinforcing beam 410 is engaged in the slot 340, the first reinforcing beam 410 and the support member 330 are bonded together using only an adhesive layer.

[0079] For example, after the end of the first reinforcing beam 410 is engaged with the slot 340, the first reinforcing beam 410 and the support member 330 are fixedly connected by fasteners.

[0080] For example, after the end of the first reinforcing beam 410 is engaged in the slot 340, the first reinforcing beam 410 and the support member 330 are fixedly connected by the use of adhesive layer and fasteners.

[0081] When fasteners are needed to connect the first reinforcing beam 410 and the support member 330, both the first reinforcing beam 410 and the support member 330 are provided with connection holes. Fasteners are sequentially inserted into the two connection holes to achieve a reliable connection between the reinforcing beam and the support member 330. For example, the fasteners may include nuts pre-embedded in the first reinforcing beam 410, and bolts extending from the lower end of the support member 330 through the two connection holes and the nut.

[0082] In some embodiments, the adhesive layer may be formed by curing an adhesive. The adhesive may be a structural adhesive.

[0083] like Figure 6As shown, in some embodiments, a recessed area 430 is formed at at least part of the connection between the first reinforcing beam 410 and the second reinforcing beam 420. A connector 50 is connected within the recessed area 430. The connector 50 is connected to both the first reinforcing beam 410 and the second reinforcing beam 420.

[0084] It is understandable that the connector 50 can be used to connect the first reinforcing beam 410 and the second reinforcing beam 420, so that the first reinforcing beam 410 and the second reinforcing beam 420 can be connected secondary by the connector 50 on the basis of welding, thereby improving the connection strength and reliability of the first reinforcing beam 410 and the second reinforcing beam 420.

[0085] In this embodiment, the connector 50 is positioned within the recessed area 430 to prevent it from protruding beyond the reinforcing beam assembly 40 and affecting the wiring on the beam. It is understood that wiring needs to be routed along the upper surface of the beam within the battery pack. If the connector 50 protrudes beyond the reinforcing beam assembly 40, the gap between the reinforcing beam assembly 40 and the battery box cover will be insufficient for wiring.

[0086] like Figure 6 As shown, recessed areas 430 are formed at the center of the T-shaped reinforcing beam assembly 40 and on the side away from the mounting beam 60. The recessed area 430 at the center of the reinforcing beam assembly 40 can be cross-shaped, and the corresponding connector 50 can also be cross-shaped. The recessed area 430 on the side away from the mounting beam 60 can be T-shaped, and the corresponding connector 50 can also be T-shaped.

[0087] In some embodiments, the connector 50 can be connected to the first reinforcing beam 410 and the second reinforcing beam 420 by fasteners. For example, connecting holes are constructed on the connector 50, the first reinforcing beam 410, and the second reinforcing beam 420, and fasteners are sequentially inserted through the connecting holes of the connector 50 and the first reinforcing beam 410, or the fasteners are sequentially inserted through the connecting holes of the connector 50 and the second reinforcing beam 420, thereby achieving a reliable connection between the connector 50 and the first reinforcing beam 410 and the second reinforcing beam 420. The fasteners include, but are not limited to, blind rivets and blind screws.

[0088] Please continue reading. Figure 4 In some embodiments, a mounting beam 60 is connected between one end beam 320 and a first reinforcing beam 410 located at the edge. The mounting beam 60 is configured to connect electrical components.

[0089] Understandably, the area between one of the end beams 320 and the first reinforcing beam 410 located at the edge can form an electrical compartment for mounting electrical components. Specifically, the electrical components can be fixed to the mounting beam 60.

[0090] It should be noted that electrical components include BMS (BATTERY MANAGEMENT SYSTEM) and BDU (Battery Drive Unit). The methods for securing electrical components include, but are not limited to, welding and fastener fixing.

[0091] In some embodiments, the mounting beam 60 can be a stamped sheet metal beam, and the thickness of the stamped sheet metal beam can be set to 1.5 mm. The stamped sheet metal beam can be made of high-strength steel HC340 / 590DP.

[0092] In some embodiments, the mounting beam 60 is a stamped sheet metal beam, and the second beam pair is also a stamped sheet metal beam, both made of HC340 / 590DP high-strength steel. Thus, the mounting beam 60 and the end beam 320 can be fixed together by welding.

[0093] In some embodiments, the mounting beam 60 is a stamped sheet metal beam, and the first reinforcing beam 410 is an extruded aluminum profile reinforcing beam. Therefore, the mounting beam 60 and the first reinforcing beam 410 cannot be fixed together by welding. Figure 7 As shown, the end of the mounting beam 60 facing the first reinforcing beam 410 can be bent to form a connecting lug 610. The connecting lug 610 fits against the first reinforcing beam 410 and is fixed by fasteners. For example, connecting holes are constructed on both the connecting lug 610 and the first reinforcing beam 410. Blind rivets are sequentially inserted into the two connecting holes to achieve a reliable connection between the mounting beam 60 and the first reinforcing beam 410.

[0094] In some embodiments, the first beam pair, the second beam pair, and the reinforcing beam assembly 40 are made of dissimilar materials.

[0095] Understandably, since the three components are made of dissimilar materials, appropriate materials can be selected based on their respective positions, allowing the box frame to meet design strength and rigidity requirements while also offering advantages such as light weight and low cost. For example, the first beam pair is a roll-formed steel beam using HC420 / 780TR high-strength steel to provide good rigidity and strength. The second beam pair is formed by stamping and bending sheet metal using HC340 / 590DP high-strength steel, resulting in lower production costs and facilitating the installation of high and low pressure components, explosion-proof valves, etc. The reinforcing beam assembly 40 is an aluminum extrusion reinforcing beam using AL6061-T6 aluminum, giving it advantages of light weight and good rigidity.

[0096] In some embodiments, the first beam pair is a roll-formed steel beam, the second beam pair is a stamped sheet metal beam, and the reinforcing beam assembly 40 is an aluminum extrusion reinforcing beam.

[0097] Each side beam 310 of the first beam pair uses roll-formed steel in a H-shape, and the thickness of the roll-formed steel can be set to 1.2 mm. The roll-formed steel can be high-strength steel HC420 / 780TR to give the first beam pair good rigidity and strength. The first beam pair is usually spaced along the width direction of the vehicle to meet the requirements of lateral compression of the battery pack and side impact safety of the entire vehicle.

[0098] Each end beam 320 of the second beam pair is formed by bending stamped sheet metal, and the thickness of the stamped sheet metal can be set to 1.2 mm. The stamped sheet metal can be made of high-strength steel HC340 / 590DP. Compared with the first beam pair, the second beam pair is weaker in strength, but its production cost is lower. The second beam pairs are usually spaced along the length of the vehicle. Forming the second beam pair based on stamped sheet metal facilitates the installation of high and low pressure components, explosion-proof valves, etc.

[0099] Both the first reinforcing beam 410 and the second reinforcing beam 420 are made of extruded aluminum profiles, and the thickness of the extruded aluminum profiles can be set to 2 mm. The extruded aluminum profiles can be made of AL6061-T6 aluminum. This gives the reinforcing beam assembly 40 the advantages of being lightweight and having high rigidity, thus improving the overall battery pack performance. The reinforcing beam assembly 40 can form a U-shaped structure, and its interior can be used to house the battery module. Based on the high strength of the reinforcing beam assembly 40, it can also resist the expansion of the battery module and prevent battery module deformation.

[0100] In related technologies, the battery pack's housing frame is typically made of a single material. For example, it may be a stamped sheet metal housing frame, a roll-formed steel housing frame, or an extruded aluminum profile housing frame. While stamped sheet metal housing frames are relatively inexpensive, they suffer from drawbacks such as heavy weight, poor strength, and low rigidity. Roll-formed steel housing frames, while also being relatively inexpensive and offering good strength and rigidity, are heavy and require expensive molds. Extruded aluminum profile housing frames, while lightweight and possessing good strength and rigidity, are relatively expensive. In this embodiment, by using roll-formed steel beams for the first beam pair, stamped sheet metal beams for the second beam pair, and aluminum extrusion reinforcing beams for the reinforcing beam assembly 40, a steel-aluminum composite housing frame can be formed. This ensures the housing frame possesses advantages such as high rigidity, high strength, and light weight, while also effectively reducing the production cost of the housing frame and increasing the overall energy density of the battery pack.

[0101] This application also provides a battery pack. The battery pack includes a battery case. The battery case adopts the case frame as described in the foregoing embodiments.

[0102] In this embodiment, the mounting member 20 includes at least two overlapping mounting plates, with each mounting plate connected to a different position along the height of the side beam 10. This allows the mounting member 20 to form multiple connection points along the height of the side beam 10, thereby increasing the connection strength between the mounting member 20 and the side beam 10. Furthermore, since a mounting member 20 is composed of multiple overlapping mounting plates, the structural strength of the mounting member 20 itself is also enhanced, improving the safety and reliability of the side beam structure.

[0103] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A side beam structure, characterized in that, include: Edge beam; A mounting bracket is connected to the side beam. The mounting bracket includes at least two overlapping mounting plates, wherein each mounting plate is connected to a different position in the height direction of the side beam.

2. The edge beam structure according to claim 1, characterized in that, The side beam has at least two installation areas spaced apart along its height, and each mounting plate is connected to one of the installation areas.

3. The edge beam structure according to claim 2, characterized in that, The side beam has a connecting portion extending toward the mounting component. The at least two mounting areas include a first connecting area and a second connecting area located on the connecting portion, and a third connecting area located on the side beam. The first connecting area and the second connecting area are located on opposite sides of the connecting portion in the height direction. The third connecting area is spaced apart from the connecting portion along the height direction of the side beam. The at least two mounting pieces include a first mounting piece, a second mounting piece, and a third mounting piece stacked sequentially. The first mounting piece is connected to the first connecting area, the second mounting piece is connected to the second connecting area, and the third mounting piece is connected to the third connecting area.

4. The edge beam structure according to claim 3, characterized in that, A sleeve is connected between the first mounting plate and the third mounting plate. The second mounting plate has a mounting hole, and the sleeve passes through the mounting hole. The sleeve is configured to be connected to the vehicle body by fasteners.

5. The edge beam structure according to any one of claims 1-4, characterized in that, The side beam is a roll-formed steel side beam, and the mounting component is a stamped sheet metal mounting component.

6. A box frame, characterized in that, include: The frame includes at least three beams, at least one of the beams being an edge beam structure as described in any one of claims 1-5; A reinforcing beam assembly is disposed within the frame and is connected to the beam body.

7. The box frame according to claim 6, characterized in that, The border includes: The first beam pair includes two spaced-apart side beams, at least one of which is the edge beam structure; The second beam pair includes two spaced-apart end beams, and the two side beams and the two end beams together form the frame.

8. The box frame according to claim 7, characterized in that, The reinforcing beam assembly includes: The first reinforcing beam is provided at least two at intervals along the first direction, and the two ends of the first reinforcing beam are respectively connected to the two side beams; The second reinforcing beam is connected at an angle to the first reinforcing beam, wherein a second reinforcing beam is provided between every two adjacent first reinforcing beams.

9. The box frame according to claim 8, characterized in that, The side beam has a support member on the side facing the first reinforcing beam, and the support member has a groove in which the end of the first reinforcing beam is engaged.

10. The box frame according to claim 9, characterized in that, An adhesive layer is provided between the first reinforcing beam and the groove wall of the slot, and / or the first reinforcing beam is connected to the support member by fasteners.

11. The box frame according to any one of claims 8-10, characterized in that, At least a portion of the connection between the first reinforcing beam and the second reinforcing beam has a recessed area, and a connector is connected within the recessed area, the connector being connected to both the first reinforcing beam and the second reinforcing beam.

12. The box frame according to any one of claims 8-10, characterized in that, One of the end beams is connected to the first reinforcing beam located at the edge by a mounting beam configured to connect electrical components.

13. The box frame according to any one of claims 8-10, characterized in that, The first beam pair, the second beam pair, and the reinforcing beam assembly are made of dissimilar materials.

14. The box frame according to claim 13, characterized in that, The first beam pair is a roll-formed steel beam, the second beam pair is a stamped sheet metal beam, and the reinforcing beam assembly is an aluminum extrusion reinforcing beam.

15. A battery pack, comprising a battery case, characterized in that, The battery box adopts the box frame as described in any one of claims 6-14.

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