CN217334287U - Battery package box frame connection structure - Google Patents

Abstract

The utility model relates to a battery package box frame connection structure, including framework and bottom plate, the framework includes a plurality of frames and the adapter of same quantity, connect through the adapter between the frame and form the framework, the both sides of adapter are equipped with the bolt, the both ends of frame are equipped with the slot, the bolt is pegged graft in the slot, be formed with the first pinhole that link up between bolt and the frame, still include the pin, the pin is pegged graft in first pinhole, with the relative slip of restriction bolt and frame, compare in prior art battery package box frame switching department through the overlap joint tailor-welding, the welding seam bearing capacity is low, the not enough problem of joint strength, the utility model discloses joint strength between the box frame is better, has promoted the anti-vibration fatigue characteristic of battery package, anti extrusion performance, shock resistance and collision performance.

Description

Battery package box frame connection structure

Technical Field

The utility model relates to a new energy automobile battery package technical field, concretely relates to battery package box frame connection structure.

Background

The battery pack box is a bearing part of a new energy automobile power battery, is generally arranged at the lower part of an automobile body, is mainly used for accommodating a battery pack module and related components and sealing internal structural parts of the battery pack; in addition, the battery pack box body plays a role in protecting internal structures such as the battery pack module, so that the internal structures such as the battery pack module are not damaged under working conditions such as vibration impact, collision and extrusion. The frames of the existing battery pack box body are connected with the bottom plate through tailor welding, the corner positions of the adjacent frames are tailor welded through angle joint, and the welding method is manual electric arc welding.

The existing scheme has the following defects: 1) the frame joint is welded in a lap joint mode, so that the welding seam has low bearing capacity and insufficient strength; furthermore, manual arc welding deteriorates the strength of the material around its heat affected zone; 2) the welding seam is used for connecting the frames, so that the dimensional tolerance cannot be absorbed, and the tolerance gap needs the width of the welding seam for compensation, so that the quality of the welding seam cannot be ensured; 3) the manual electric arc welding process has poor consistency, the structure of a corner is complex, welding is not easy, the defects of insufficient welding, false welding, uneven welding seams and the like are easy to occur, and therefore welding is unreliable and the defective rate is high.

Due to the defects of frame welding, the connection strength of the frame of the battery pack box body is insufficient, and under the action of working conditions such as vibration impact, collision and extrusion, a welding line is easy to crack, so that structural connection failure and poor sealing are caused, and even serious consequences such as fire explosion of the battery pack are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an: the battery pack box body frame connecting structure is provided for solving the problems that in the prior art, the frame connecting part of a battery pack box body is welded through lap joint, the welding seam bearing capacity is low, and the connecting strength is insufficient.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a battery package box frame connection structure, includes framework and bottom plate, the framework includes a plurality of frames and the adapter of the same quantity, pass through between the frame the adapter is connected and is formed the framework, the both sides of adapter are equipped with the bolt, the both ends of frame are equipped with the slot, the bolt is pegged graft in the slot, be formed with the first pinhole that link up between bolt and the frame, still include the pin, the pin is pegged graft in the first pinhole, in order to restrict the bolt with the relative slip of frame.

Adopt aforementioned technical scheme the utility model discloses, through setting up the frame that the adapter of taking the bolt connects the battery package box to spacing with the pin, box frame, adapter and pin form interlocking structure, compare in prior art battery package box frame switching department through the overlap joint tailor-welding, the welding seam bearing capacity is low, problem that joint strength is not enough, the utility model discloses joint strength between the box frame is better, has promoted performances such as the anti-vibration fatigue characteristic of battery package, anti extrusion performance, impact collision resistance.

Further, the pin with the frame welding, just the pin with scribble sealed glue between the frame, the welding pin prevents that it from dropping from first pinhole, scribbles sealed glue and increases the gas tightness.

Further, first pinhole sets up along vertical direction, the top and the bottom of pin do not all exceed the upper and lower surface of frame prevent that the pin from influencing the installation of the upper cover and the bottom plate of battery package box.

Further, the cover is equipped with seal ring on the bolt, seal ring laminating compress tightly in the end of frame with between the adapter, seal ring compensation box body frame's dimensional tolerance and other tolerance that warp and produce make the battery package sealed more reliable, the gas tightness is better.

Furthermore, the sealing washer comprises an inner ring washer and an outer ring washer which are connected, the inner ring washer and the outer ring washer have different compressibility, and the part of the washer with poor compressibility can not be compressed after being compressed to a certain position, so that the limiting effect can be achieved, and the other parts of the washers can be prevented from being crushed and losing elasticity.

Furthermore, a through second pin hole is formed in the frame, a through third pin hole is formed in the bolt, the second pin hole and the third pin hole are identical in cross-sectional shape and size, the second pin hole and the third pin hole are staggered to form a first pin hole, the cross-sectional area of the first pin hole is smaller than that of the second pin hole, and the bolt is inserted into the first pin hole, well attached to the bolt and the frame and not prone to loosening.

Furthermore, the cross sections of the second pin hole and the third pin hole are rhombic, the cross section of the first pin hole formed by the second pin hole and the third pin hole in a staggered mode is also rhombic, the cross section of the plug pin is also rhombic, the shape is regular, and production and manufacturing are facilitated.

Compared with the prior art, the beneficial effects of the utility model are that: the connection strength between the box body frames is better, and the vibration fatigue resistance, the extrusion resistance, the impact collision resistance and other properties of the battery pack are improved; the sealing washer compensates the dimensional tolerance of the frame of the box body and the tolerance generated by other deformation, so that the battery pack is more reliably sealed and has better air tightness; the assembly process is simple, the frame welding seam connection is replaced, the product quality consistency is better, the defective rate is lower, and therefore the production cost is saved.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of a frame attachment structure;

FIG. 3 is a top view of the frame attachment structure;

FIG. 4 is a schematic view of a second frame structure;

FIG. 5 is a schematic view of a first step installation;

FIG. 6 is a second installation schematic;

fig. 7 is a schematic view of the third installation step.

The labels in the figure are: 1-frame, 11-first frame, 12-second frame, 13-third frame, 14-fourth frame, 2-adapter, 3-bolt, 4-sealing washer, 5-second pin hole, 6-pin, 7-third pin hole, 8-first pin hole and 9-slot.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The embodiment provides a battery pack box body frame connecting structure, as shown in fig. 1-4, which comprises a frame body and a bottom plate, wherein the frame body comprises a plurality of frames 1 and a same number of adapters 2, the frames 1 are connected through the adapters 2 to form the frame body, two sides of each adapter 2 are provided with a plug pin 3, two ends of each frame 1 are provided with a slot 9, the plug pins 3 are inserted into the slots 9, a through first pin hole 8 is formed between each plug pin 3 and each frame 1, and each battery pack box body frame connecting structure further comprises a pin 6, the pin 6 is inserted into the first pin hole 8 to limit the relative sliding between each plug pin 3 and each frame 1;

the pin 6 is welded with the frame 1, and sealant is coated between the pin 6 and the frame 1;

the first pin holes 8 are arranged along the vertical direction, and the top and the bottom of the pin 6 do not exceed the upper surface and the lower surface of the frame 1;

a sealing washer 4 is sleeved on the bolt 3, and the sealing washer 4 is tightly attached and pressed between the end of the frame 1 and the adapter 2; the sealing washer 4 is not too thick nor too thin, in the embodiment, the thickness of the sealing washer 4 is 2mm after being pressed, and the cross section of the sealing washer is consistent with that of the frame 1;

the sealing washer 4 comprises an inner ring washer and an outer ring washer which are connected, and the compressibility of the inner ring washer is different from that of the outer ring washer; the outer ring gasket is made of a material which is good in compressibility and large enough in rigidity after being compressed, the material of the inner ring gasket cannot be compressed after being compressed to a certain position, for example, the material can be selectively compressed to 40% of the original thickness, the material is specifically determined according to a compression and elasticity curve of the outer ring gasket, and the inner ring gasket is set for limiting and preventing the outer layer gasket from being crushed and losing elasticity; the material characteristics and functions of the inner and outer ring gaskets can be interchanged;

a through second pin hole 5 is formed in the frame 1, a through third pin hole 7 is formed in the plug pin 3, the second pin hole 5 and the third pin hole 7 are identical in cross section shape and size, first pin holes 8 are formed between the second pin hole 5 and the third pin hole 7 in a staggered mode, and the cross section area of the first pin holes 8 is smaller than that of the second pin holes 5;

the cross-sectional shapes of the second pin hole 5 and the third pin hole 7 are rhombus.

When installing, the steps are as follows:

1) as shown in fig. 5, a first frame 11 on one side is fixed by a tool, a sealing washer 4 is sleeved on a plug pin 3 of an adapter 2, then the plug pins 3 of the adapter 2 are respectively arranged in corresponding slots 9 on two sides of the first frame 11, after the sealing washer 4 is sufficiently compressed, a first pin hole 8 is formed between the plug pin 3 and the first frame 11, a pin 6 is arranged in the first pin hole 8, so that the top and the bottom of the pin 6 are not exposed out of the surface of the first frame 11, the top and the bottom of the pin 6 are respectively fixed with the first frame 11 by spot welding, the pin 6 is prevented from falling off, and finally a sealant is coated around the pin 6 to complete the first-step assembly;

2) as shown in fig. 6, the frames assembled in the first step shown in fig. 5 are fixed by tools, and the slots 9 of the second frame 12 and the fourth frame 14 on the other two sides in fig. 6 are respectively assembled with the pins 3 of the adapter 2 assembled in the first step shown in fig. 5. The installation method of the adapter 2, the pin 6 and the frame is the same as that of the first step, and meanwhile, the bottom plate of the box body is well installed and correspondingly welded;

3) as shown in fig. 7, the first step is repeated for the third frame 13, after that, the second step of assembled box body shown in fig. 6 is fixed by using a tool, the assembled third frame 13 shown in fig. 7 is taken as a whole to be installed into the assembly body shown in fig. 7, the installation and locking method is the same as that of the first step, and the structure of the assembled box body is shown in fig. 1.

By adopting the technical scheme, the utility model discloses, through setting up the frame that the adapter of taking the bolt connects the battery package box, and spacing with the pin, box frame, adapter and pin form interlocking structure, compare in prior art battery package box frame switching department through the overlap joint tailor-welding, the welding seam bearing capacity is low, the problem of joint strength insufficiency, the utility model discloses joint strength between the box frame is better, has promoted the performance such as anti-vibration fatigue characteristic, anti extrusion performance, anti-impact collision of battery package; meanwhile, the sealing washer compensates the dimensional tolerance of the frame of the box body and the tolerance generated by other deformation, so that the battery pack is more reliably sealed and has better air tightness; the assembly process is simple, the frame welding seam connection is replaced, the product quality consistency is better, the defective rate is lower, and therefore the production cost is saved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a battery package box frame connection structure, includes framework and bottom plate, its characterized in that: the framework includes a plurality of frames (1) and adapter (2) of the same quantity, pass through between frame (1) adapter (2) are connected and are formed the framework, the both sides of adapter (2) are equipped with bolt (3), the both ends of frame (1) are equipped with slot (9), bolt (3) are pegged graft in slot (9), be formed with first pinhole (8) that link up between bolt (3) and frame (1), still include pin (6), pin (6) are pegged graft in first pinhole (8), in order to restrict bolt (3) with the relative slip of frame (1).

2. The battery pack box frame connecting structure according to claim 1, characterized in that: the pin (6) with frame (1) welding, just pin (6) with scribble sealed glue between frame (1).

3. The battery pack box frame connecting structure of claim 2, wherein: the first pin holes (8) are arranged in the vertical direction, and the tops and the bottoms of the pins (6) do not exceed the upper surface and the lower surface of the frame (1).

4. The battery pack box frame connecting structure according to claim 1, characterized in that: the cover is equipped with seal ring (4) on bolt (3), seal ring (4) laminating compress tightly in the end of frame (1) with between adapter (2).

5. The battery pack box frame connecting structure of claim 4, wherein: the sealing washer (4) comprises an inner ring washer and an outer ring washer which are connected, and the compressibility of the inner ring washer is different from that of the outer ring washer.

6. The battery pack box frame connecting structure of claim 4, wherein: the frame (1) is provided with a through second pin hole (5), the bolt (3) is provided with a through third pin hole (7), the second pin hole (5) is identical to the third pin hole (7) in cross section shape and size, the second pin hole (5) is staggered with the third pin hole (7) to form a first pin hole (8), and the cross section area of the first pin hole (8) is smaller than that of the second pin hole (5).

7. The battery pack box frame connection structure of claim 6, wherein: the cross sections of the second pin hole (5) and the third pin hole (7) are rhombic.

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