Battery pack box body

Abstract

The utility model belongs to the technical field of power batteries, and discloses a battery pack box body, which comprises a frame, lifting lugs are arranged on two opposite sides of the frame, each lifting lug is detachably connected with the frame through a plurality of fasteners, each fastener comprises a flange part arranged between each lifting lug and the frame, the inner side surface of each flange part is fixedly connected with the outer side surface of the frame, and the inner side surface of each flange part is fixedly connected with the outer side surface of the frame. The outer side face of the flange part makes contact with the lifting lug. The fastener of the box body structure is provided with the flange part, so that the contact area between the frame and the lifting lug is increased, and the stress is reduced; a plurality of fasteners are arranged to fix the lifting lugs, and the fasteners play a role of reinforcing ribs, so that the integral rigidity of the box body structure can be enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and specifically relates to a battery pack housing. Background Technology

[0002] As new energy develops rapidly, the industry's demand for cost reduction is gradually increasing. As a key component for cost reduction, the price advantage of using steel housings for battery packs has led to an increasing market share for roll-formed steel housings.

[0003] The existing roll-formed steel box bodies have the following problems:

[0004] 1. Due to the current process characteristics of roll-formed steel and the high energy density of battery packs, the profiles used in existing roll-formed steel boxes are generally thin-walled and simple in structure. When used as the frame of the box, the overall rigidity of the box is relatively weak.

[0005] 2. When the lifting lugs of the battery pack box are screwed, an adapter plate needs to be welded to the frame, and nuts / bolts need to be welded to the adapter plate. This results in more structural parts and more welding, which can easily cause welding deformation and dimensional deviation.

[0006] Therefore, we consider designing a box structure that enhances the rigidity of roll-formed steel to meet the wider application requirements of roll-formed steel boxes. Utility Model Content

[0007] To address the above problems, this utility model provides a battery pack housing, employing the following technical solution:

[0008] A battery pack housing includes a frame, with lifting lugs on opposite sides. Each lifting lug is detachably connected to the frame via a plurality of fasteners. Each fastener includes a flange portion disposed between the lifting lug and the frame. The inner side of the flange portion is fixedly connected to the outer side of the frame, and the outer side of the flange portion contacts the lifting lug.

[0009] Furthermore, the fasteners also include nuts and bolts. The frame has multiple mounting holes on the side connected to the lifting lug, and each mounting hole contains a nut. The nut is fixedly connected to the frame. The flange is integrally formed with the nut. The bolt passes through the lifting lug and is connected to the nut.

[0010] Furthermore, the end of the nut away from the flange extends to the outside of the mounting hole, the end of the nut away from the flange is sealed to the frame, and the inner side of the flange is sealed to the outer side of the frame.

[0011] Furthermore, the frame includes a first crossbeam, a second crossbeam, a first longitudinal beam, a second longitudinal beam, a first inclined beam, and a second inclined beam;

[0012] The first crossbeam and the second crossbeam are provided with the lifting lugs on their outer surfaces, and the first crossbeam and the second crossbeam are provided with a plurality of mounting holes on their outer surfaces.

[0013] The two ends of the first longitudinal beam are respectively connected to one end of the first crossbeam and one end of the second crossbeam. One end of the second longitudinal beam is connected to the other end of the first crossbeam through the first inclined beam, and the other end of the second longitudinal beam is connected to the other end of the second crossbeam through the second inclined beam.

[0014] Furthermore, the frame also includes multiple reinforcing beams, each of which is connected at both ends to the first crossbeam and the second crossbeam, and each reinforcing beam is provided with weight-reducing holes.

[0015] Furthermore, the frame also includes a third crossbeam, one end of which is connected to the middle of the first longitudinal beam, and the other end of which is connected to the middle of the second longitudinal beam.

[0016] Furthermore, each of the reinforcing beams has a groove at its top that matches the cross-section of the third crossbeam, the third crossbeam passes through the groove on each of the reinforcing beams and is connected therethrough, and the bottom surface of the third crossbeam is flush with the bottom surfaces of the multiple reinforcing beams.

[0017] Furthermore, the lifting lug includes a bolt connection part and a lifting part, wherein the bolt connection part is provided with a connection hole, and each nut is provided with a corresponding connection hole. The inner side of the bolt connection part contacts the outer side of the flange part, and the bolt passes through the connection hole and connects with the nut.

[0018] Furthermore, the cross-section of the lifting lug is T-shaped, the lifting part is provided with multiple lifting holes along the length direction, and the bolt connection part is provided with connection holes on both sides of each lifting hole.

[0019] The beneficial effects of this utility model are:

[0020] 1. The fasteners of the box structure of this utility model have flanges, which increase the contact area between the frame and the lifting lugs and reduce stress; by setting multiple fasteners to fix the lifting lugs, the fasteners act as reinforcing ribs, which can enhance the overall rigidity of the box structure.

[0021] 2. The box structure of this utility model does not require welding of the adapter plate to the frame, which reduces welds and avoids deformation and dimensional deviation of the frame caused by welding.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An isometric view of a battery pack housing according to an embodiment of the present invention is shown;

[0025] Figure 2 A schematic diagram of the installation of the lifting lug and the second crossbeam according to an embodiment of the present invention is shown;

[0026] Figure 3 A schematic diagram of the installation of the flange, frame, and lifting lugs according to an embodiment of the present invention is shown.

[0027] In the diagram: 1. Frame; 2. Fastener; 3. Lifting lug; 4. Mounting hole; 101. First crossbeam; 102. Second crossbeam; 103. First longitudinal beam; 104. Second longitudinal beam; 105. First diagonal beam; 106. Second diagonal beam; 107. Reinforcing beam; 108. Weight reduction hole; 109. Third crossbeam; 110. Groove; 201. Flange; 202. Nut; 203. Bolt; 301. Bolted connection; 302. Lifting part; 303. Connection hole; 304. Lifting hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0030] This utility model provides a battery pack housing that solves the problem of weak rigidity of roll-formed steel battery pack housings, reduces structural components and welds, and avoids dimensional deviations caused by welding deformation.

[0031] like Figure 1 As shown, a battery pack housing includes a frame 1, fasteners 2 and lifting lugs 3. The frame 1 is provided with lifting lugs 3 on both opposite sides, and each lifting lug 3 is detachably connected to the frame 1 by multiple fasteners 2.

[0032] like Figure 3 As shown, the fastener 2 includes a flange 201 disposed between the lifting lug 3 and the frame 1. The inner side of the flange 201 is fixedly connected to the outer side of the frame 1. For example, the inner side of the flange 201 is welded to the outer side of the frame 1, and the outer side of the flange 201 is in contact with the lifting lug 3.

[0033] The fastener 2 of the box structure of this utility model has a flange portion 201, which increases the contact area between the frame 1 and the lifting lug 3 and reduces stress; by setting multiple fasteners 2 to fix the lifting lug 3, the fastener 2 acts as a reinforcing rib of the frame 1, which can enhance the overall rigidity of the box structure.

[0034] like Figure 2 As shown, for example, fastener 2 also includes a nut 202 and a bolt 203. The frame 1 has multiple mounting holes 4 on the side connected to the lifting lug 3, and each mounting hole 4 contains a nut 202. The nut 202 is fixedly connected to the frame 1, for example, by welding. The flange 201 is integrally formed with the nut 202, and the bolt 203 passes through the lifting lug 3 and is threadedly connected to the nut 202.

[0035] For example, the end of the nut 202 away from the flange 201 extends to the outside of the mounting hole 4, and the end of the nut 202 away from the flange 201 is fully welded to the frame 1 to form a fillet weld. The inner side of the flange 201 is fully welded to the outer side of the frame 1 to form a fillet weld, thereby increasing the weld strength.

[0036] like Figure 1As shown, for example, frame 1 is formed by welding roll-formed steel profiles and includes a first crossbeam 101, a second crossbeam 102, a first longitudinal beam 103, a second longitudinal beam 104, a first inclined beam 105, and a second inclined beam 106.

[0037] The first crossbeam 101 and the second crossbeam 102 are parallel to each other. The outer surfaces of the first crossbeam 101 and the second crossbeam 102 are provided with lifting lugs 3, and the outer surfaces of the first crossbeam 101 and the second crossbeam 102 are provided with multiple mounting holes 4.

[0038] The first horizontal beam 101 is perpendicular to the first vertical beam 103. The first vertical beam 103 and the second vertical beam 104 are parallel to each other. The two ends of the first vertical beam 103 are connected to one end of the first horizontal beam 101 and one end of the second horizontal beam 102, respectively. One end of the second vertical beam 104 is connected to the other end of the first horizontal beam 101 through the first inclined beam 105. The other end of the second vertical beam 104 is connected to the other end of the second horizontal beam 102 through the second inclined beam 106.

[0039] For example, the frame 1 also includes a plurality of reinforcing beams 107, each of which is connected at both ends to the first crossbeam 101 and the second crossbeam 102 respectively. Each reinforcing beam 107 is provided with a waist-shaped weight-reducing hole 108. For example, the plurality of reinforcing beams 107 are parallel to each other and are perpendicular to the first crossbeam 101 and the second crossbeam 102. For example, the distance between two adjacent reinforcing beams 107 in the plurality of end plates is equal.

[0040] For example, the frame 1 also includes a third crossbeam 109, which is parallel to the first crossbeam 101 and the second crossbeam 102. One end of the third crossbeam 109 is detachably connected to the middle of the first longitudinal beam 103 by bolts 203, and the other end of the third crossbeam 109 is detachably connected to the middle of the second longitudinal beam 104 by bolts 203.

[0041] For example, each reinforcing beam 107 has a groove 110 at its top that matches the cross section of the third crossbeam 109. The third crossbeam 109 passes through the groove 110 on each reinforcing beam 107 and is fully welded together. The bottom surface of the third crossbeam 109 is flush with the bottom surface of the multiple reinforcing beams 107.

[0042] like Figure 2 and Figure 3 As shown, for example, the lifting lug 3 includes a bolt connection part 301 and a lifting part 302. The bolt connection part 301 is provided with a connection hole 303. Each nut 202 is provided with a corresponding connection hole 303. The inner side of the bolt connection part 301 contacts the outer side of the flange part 201. The bolt 203 passes through the connection hole 303 and is threadedly connected to the nut 202 to fix the lifting lug 3 on the frame 1.

[0043] For example, the cross-section of the lifting lug 3 is T-shaped, the lifting part 302 and the bolt connection part 301 are perpendicular to each other, the lifting part 302 is provided with multiple lifting holes 304 along the length direction, and both ends of the lifting part 302 are provided with rounded corners.

[0044] For example, the bolt connection part 301 is provided with a connection hole 303 on both sides of each lifting hole 304. For example, the bolt connection part 301 is provided with a connection hole 303 on both sides of each lifting hole 304 at the upper position of the lifting part 302. The connection holes 303 are arranged around the lifting hole 304 to increase the structural strength of the lifting position.

[0045] For example, the end faces of the bolt connection part 301 and the upper and lower parts of the hoisting part 302 are both inclined surfaces. The connection surface of the bolt connection part 301 and the hoisting part 302 is set as an inclined surface, which plays a role in strengthening the connection strength.

[0046] The fastener 2 connecting the lifting lug 3 of this utility model has a flange 201, which can increase the contact area with the lifting lug 3 and reduce stress; the nut 202 penetrates the frame 1 and is fully welded on the inside and outside to increase the weld strength. Multiple fasteners 2 are set to connect the lifting lug 3. The fasteners 2 act as reinforcing ribs, which can improve the overall rigidity of the box structure. It can replace the aluminum alloy box in mid-to-high-end battery packs and realize the wider application of roll-formed steel box.

[0047] The box structure of this utility model does not require welding of the adapter plate to the frame 1, which reduces the number of welds and avoids deformation and dimensional deviation of the frame 1 caused by welding.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack housing, characterized in that, The frame (1) includes a frame (1) with lifting lugs (3) on both sides. Each lifting lug (3) is detachably connected to the frame (1) by a plurality of fasteners (2). The fasteners (2) include a flange (201) disposed between the lifting lug (3) and the frame (1). The inner side of the flange (201) is fixedly connected to the outer side of the frame (1), and the outer side of the flange (201) contacts the lifting lug (3).

2. The battery pack housing according to claim 1, characterized in that, The fastener (2) further includes a nut (202) and a bolt (203). The frame (1) has a plurality of mounting holes (4) on the side connected to the lifting lug (3). Each mounting hole (4) is provided with a nut (202). The nut (202) is fixedly connected to the frame (1). The flange (201) is integrally formed with the nut (202). The bolt (203) passes through the lifting lug (3) and is connected to the nut (202).

3. The battery pack housing according to claim 2, characterized in that, The nut (202) extends from the flange (201) to the outside of the mounting hole (4), and the end of the nut (202) away from the flange (201) is sealed to the frame (1). The inner side of the flange (201) is sealed to the outer side of the frame (1).

4. The battery pack housing according to claim 2, characterized in that, The frame (1) includes a first crossbeam (101), a second crossbeam (102), a first longitudinal beam (103), a second longitudinal beam (104), a first diagonal beam (105), and a second diagonal beam (106); The first crossbeam (101) and the second crossbeam (102) are provided with the lifting lugs (3) on their outer sides, and the first crossbeam (101) and the second crossbeam (102) are provided with a plurality of mounting holes (4) on their outer sides. The two ends of the first longitudinal beam (103) are respectively connected to one end of the first crossbeam (101) and one end of the second crossbeam (102). One end of the second longitudinal beam (104) is connected to the other end of the first crossbeam (101) through the first inclined beam (105), and the other end of the second longitudinal beam (104) is connected to the other end of the second crossbeam (102) through the second inclined beam (106).

5. The battery pack housing according to claim 4, characterized in that, The frame (1) also includes a plurality of reinforcing beams (107), each of which is connected at both ends to the first crossbeam (101) and the second crossbeam (102), and each of the reinforcing beams (107) is provided with a weight-reducing hole (108).

6. The battery pack housing according to claim 5, characterized in that, The frame (1) also includes a third crossbeam (109), one end of which is connected to the middle of the first longitudinal beam (103), and the other end of which is connected to the middle of the second longitudinal beam (104).

7. The battery pack housing according to claim 6, characterized in that, Each of the reinforcing beams (107) has a groove (110) at its top that matches the cross section of the third crossbeam (109). The third crossbeam (109) passes through the groove (110) on each of the reinforcing beams (107) and is connected to it. The bottom surface of the third crossbeam (109) is flush with the bottom surface of the multiple reinforcing beams (107).

8. The battery pack housing according to any one of claims 2-7, characterized in that, The lifting lug (3) includes a bolt connection part (301) and a lifting part (302). The bolt connection part (301) is provided with a connection hole (303). Each nut (202) is provided with a corresponding connection hole (303). The inner side of the bolt connection part (301) contacts the outer side of the flange part (201). The bolt (203) passes through the connection hole (303) and connects with the nut (202).

9. The battery pack housing according to claim 8, characterized in that, The cross-section of the lifting lug (3) is T-shaped, and the lifting part (302) is provided with a plurality of lifting holes (304) along the length direction. The bolt connection part (301) is provided with a connection hole (303) on both sides of each lifting hole (304).

Images