阅读说明：本技术 一种电池托盘密封结构 (Battery tray seal structure ) 是由 丁为广 陈智家 郭大洲 于 2021-07-07 设计创作，主要内容包括：本发明公开了一种电池托盘密封结构,包括车身、内部具有电池模组的电池托盘,在电池托盘的边缘设有环形的下密封面,在车身下侧设有与下密封面相对的上密封面,在上密封面和下密封面之间设有密封条,在上密封面以及下密封面上分别设有若干间隔布置的螺栓过孔,在上密封面的背面对应螺栓过孔处设有凸焊螺母,在密封条对应螺栓过孔处设有螺栓通孔,所述靠近下密封面的螺栓通孔内嵌设有限位钢套,在电池托盘上设有依次穿过下密封面的螺栓过孔、限位钢套、螺栓通孔、上密封面的螺栓过孔后与凸焊螺母螺纹连接的紧固螺栓。本发明既可简化车辆电池包部分的制造、检测工序和初期投资,继而降低生产成本,又有利于加快整车的生产节拍,提高生产效率。(The invention discloses a battery tray sealing structure which comprises a vehicle body and a battery tray internally provided with a battery module, wherein an annular lower sealing surface is arranged at the edge of the battery tray, an upper sealing surface opposite to the lower sealing surface is arranged at the lower side of the vehicle body, a sealing strip is arranged between the upper sealing surface and the lower sealing surface, a plurality of bolt through holes which are arranged at intervals are respectively arranged on the upper sealing surface and the lower sealing surface, a projection welding nut is arranged at the back surface of the upper sealing surface corresponding to a bolt through hole, a bolt through hole is arranged at the sealing strip corresponding to the bolt through hole, a limiting steel sleeve is embedded in the bolt through hole close to the lower sealing surface, and a fastening bolt which sequentially penetrates through the bolt through hole of the lower sealing surface, the limiting steel sleeve, the bolt through hole and the bolt through hole of the upper sealing surface and is in threaded connection with the projection welding nut. The invention can simplify the manufacturing and detecting procedures and initial investment of the vehicle battery pack part, thereby reducing the production cost, being beneficial to accelerating the production beat of the whole vehicle and improving the production efficiency.)

1. The utility model provides a battery tray seal structure, includes automobile body, the inside battery tray that has the battery module, characterized by is equipped with annular lower seal face at battery tray's edge, is equipped with the upper seal face relative with lower seal face at the automobile body downside, is equipped with the sealing strip between upper seal face and lower seal face, is equipped with the bolt via hole of a plurality of interval arrangements respectively on upper seal face and lower seal face, corresponds bolt through hole department at the back of upper seal face and is equipped with projection nut, is equipped with the bolt through hole department at the sealing strip corresponds bolt via hole, the bolt through hole that is close to lower seal face is embedded to be equipped with spacing steel bushing, is equipped with the fastening bolt who passes bolt via hole, spacing steel bushing, bolt through hole, the bolt via hole of upper seal face and projection nut threaded connection of passing in proper order on battery tray.

2. The battery tray sealing structure of claim 1, wherein the sealing strip is bonded to the lower sealing surface.

3. A battery tray sealing structure according to claim 3, wherein a counterbore is provided at an end of said bolt through hole adjacent to the lower sealing surface, and said restraining steel sleeve is fitted as an insert in said counterbore when the sealing strip is molded.

4. The battery tray sealing structure according to claim 1, wherein the inner hole opening end of the limiting steel sleeve is provided with a guide chamfer.

5. The battery tray sealing structure according to claim 1, wherein the vehicle body includes an inner threshold, the upper sealing surface is provided on the inner threshold, a threshold reinforcing plate is welded to an upper side of the inner threshold, and the projection nut is provided on the threshold reinforcing plate.

6. The battery tray sealing structure according to claim 5, wherein the sealing strip is a silicon-based foam rubber strip having a width of 25 ± 5mm and a thickness of 5 ± 2 mm.

7. The battery tray sealing structure according to claim 3, wherein the counter bore is a conical bore with a larger opening and a smaller bottom, the diameter of the opening of the counter bore is 2-3mm larger than that of the bottom, and the depth of the counter bore is 2-3 mm.

8. The battery tray sealing structure of claim 6, wherein the compression amount of the sealing strip is 40-60% of the thickness of the sealing strip.

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a battery tray sealing structure.

Background

With the rapid development of economy and the continuous enhancement of environmental awareness of people, electric vehicles using lithium batteries are rapidly popularized.

As an electric vehicle, it is known that it generally includes a separate battery pack assembly, and the existing battery pack assembly includes an upper case, a lower case, and battery modules disposed in the upper case and the lower case, which are covered together, and of course, a sealing tape is required to be disposed between the upper case and the lower case to achieve sealing between the upper case and the lower case. That is, the battery pack assembly is assembled as a stand-alone assembly in the entire production line. When the whole vehicle needs to be assembled, the battery pack assembly is assembled to the lower portion of the vehicle body through the bolts.

However, such a battery pack assembly has the following technical drawbacks: firstly, when manufacturing the battery pack assembly, related performance detection is required, when the battery pack assembly is assembled on a vehicle body so as to complete the assembly of the whole vehicle, the performance of the battery pack assembly and the matching performance of the battery pack assembly and the whole vehicle are required to be tested in a related manner, and therefore corresponding detection procedures and cost can be increased. Secondly, in order to realize the sealing between the upper shell and the lower shell, a circle of annular sealing surface is required to be arranged on the lower side of the edge of the upper shell and the upper side of the edge of the lower shell respectively, a plurality of rivet nuts arranged at intervals are arranged on the lower side of the edge of the lower shell along the sealing surface, a plurality of bolt through holes arranged at intervals are arranged on the edge of the upper shell along the sealing surface, and bolt through holes are arranged on the sealing strip at the positions corresponding to the rivet nuts. When we need to assemble the upper shell and the lower shell into the battery pack assembly, the sealing strip needs to be positioned on the edge sealing surface of the lower shell, then the upper shell is placed and positioned on the lower shell, and then the fastening bolt is arranged in the bolt through hole of the upper shell and is in threaded connection with the rivet nut on the lower shell after penetrating through the bolt through hole and the bolt through hole in the sealing strip. In addition, bolt through holes connected with the vehicle body need to be formed in the edge of the battery pack assembly, and corresponding rivet bolts need to be arranged on the vehicle body, so that the assembly workload is increased meaninglessly. It can be understood that the rivet nut requires a special rivet device to complete the fixed connection, so that only the corresponding rivet device needs to be prepared in the production and manufacturing departments of the battery pack assembly and the whole vehicle assembly department, which increases the initial investment cost, and the rivet nut has a large axial height dimension, thereby increasing the outer dimension of the lower case and the whole battery pack assembly or the vehicle body.

Disclosure of Invention

The invention aims to provide a battery tray sealing structure which can simplify the manufacturing and detecting processes and initial investment of a battery pack part of a vehicle, further reduce the production cost, and is beneficial to accelerating the production rhythm of the whole vehicle and improving the production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a battery tray seal structure, includes automobile body, inside has the battery tray of battery module, is equipped with annular lower seal face at the edge of battery tray, is equipped with the upper seal face relative with lower seal face at the automobile body downside, is equipped with the sealing strip between upper seal face and lower seal face, is equipped with the bolt via hole of a plurality of interval arrangements respectively on upper seal face and lower seal face, corresponds bolt through hole department at the back of upper seal face and is equipped with projection nut, corresponds bolt via hole department at the sealing strip and is equipped with the bolt through-hole, the embedded spacing steel bushing that is equipped with of bolt through hole that is close to lower seal face is equipped with bolt via hole, spacing steel bushing, bolt through hole, the bolt via hole back and the projection nut threaded connection's of upper seal face fastening bolt via hole that pass lower seal face in proper order on the battery tray.

First, the present invention provides an annular lower seal surface at the edge of the battery tray, and an upper seal surface opposite to the lower seal surface at the lower side of the vehicle body. Thus, we can assemble the battery module into the battery tray in-line and then place and position the sealing strip at the lower sealing surface to form an open-top battery pack assembly. When the whole vehicle is assembled, only the battery pack assembly with the opening at the upper part is assembled to the lower side of the vehicle body through the fastening bolt, and the sealing strip can realize the sealing between the upper sealing surface and the lower sealing surface. That is to say, the invention makes full use of the sheet metal structures such as the floor, the threshold and the like of the vehicle body to replace the existing upper shell, thereby reducing the number of spare parts and production cost, and the battery pack assembly can be assembled and detected on line in advance so as to avoid influencing the assembly beat of the whole vehicle.

In addition, the existing vehicle body is generally provided with a rivet nut for fixing a battery pack, which not only needs special roughening equipment, but also has high axial height, and thus the effective utilization of the space at the bottom of the vehicle body is influenced. The projection welding nut is arranged at the position, corresponding to the bolt through hole, on the back surface of the upper sealing surface, so that the nut fixing strength is ensured, the processing and the manufacturing are convenient, the axial height is reduced, and the space at the bottom of the vehicle body is more compact.

Particularly, the limiting steel sleeve is arranged in the bolt through hole of the sealing strip, so that the sealing strip can be effectively prevented from being damaged when the fastening bolt penetrates through the bolt through hole, and the sealing effect of the sealing strip is ensured.

Preferably, the sealing strip is bonded to the lower sealing surface.

Because the sealing strip is bonded on the lower sealing surface of the battery tray, the displacement of the sealing strip when the battery pack assembly is assembled on the vehicle body can be avoided, and the installation and the fixation of the sealing strip on the battery tray are convenient.

Preferably, a counter bore is formed in one end, close to the lower sealing surface, of the bolt through hole, and when the sealing strip is molded, the limiting steel sleeve is embedded in the counter bore as an insert.

Because the limiting steel sleeve is embedded in the counter bore of the bolt through hole, the sealing strip can be tightly attached to the upper sealing surface and the lower sealing surface, the sealing effect of the sealing strip can be further ensured, and meanwhile, the displacement and the falling off of the limiting steel sleeve can be avoided.

Preferably, the opening end of the inner hole of the limiting steel sleeve is provided with a guide chamfer.

The guide chamfer is convenient for the fastening bolt to pass through the inner hole of the limiting steel sleeve, and is favorable for improving the assembly efficiency.

Preferably, the vehicle body comprises an inner threshold, the inner threshold is provided with the upper sealing surface, the upper side of the inner threshold is welded with a threshold reinforcing plate, and the projection welding nut is arranged on the threshold reinforcing plate.

The inner door is welded with the threshold reinforcing plate, and the projection welding nut is arranged on the threshold reinforcing plate, so that the fixing strength and rigidity of the projection welding nut can be effectively improved, and the reliable connection of the battery pack assembly and the vehicle body is ensured.

Preferably, the sealing strip is a silicon foaming rubber strip, the width of the sealing strip is 25 +/-5 mm, and the thickness of the sealing strip is 5 +/-2 mm.

The sealing strip made of the silicon foaming adhesive tape has good elasticity, so that the long-term effectiveness of the sealing strip is ensured.

The invention controls the size of the sealing strip in the following range: the width is 25mm 5mm, and thickness is 5mm 2mm, can ensure that the sealing strip has sufficient compressive capacity and laminating area, then ensures its sealed effect, forms the compression to the sealing strip when being convenient for again the battery package assembly.

Preferably, the counter bore is a conical bore with a larger opening and a smaller bottom, the diameter of the opening of the counter bore is 2-3mm larger than that of the bottom, and the depth of the counter bore is 2-3 mm.

The counter bore is set to be the conical bore, and correspondingly, the limiting steel sleeve is also conical in shape, so that the limiting steel sleeve is conveniently embedded in the counter bore. In particular, the conical counter bore is provided with a suitable taper by reasonably controlling the diameter difference of the large end and the small end of the counter bore. When the sealing strip is extruded, the outer side surface of the limiting steel sleeve can form downward extrusion component force on the sealing strip, so that the sealing strip can be tightly attached to the upper sealing surface and the lower sealing surface, and the limiting steel sleeve is prevented from generating relative displacement in the counter bore.

Preferably, the compression amount of the sealing strip is 40-60% of the thickness of the sealing strip.

The invention reasonably controls the compression amount of the sealing strip, and is convenient to assemble on the premise of ensuring good sealing effect.

When the compression amount of the sealing strip is less than 40% of the thickness of the sealing strip, the sealing effect is influenced; when the compression amount of the sealing tape is more than 60% of the thickness of the sealing tape, assembling difficulty is caused and the sealing tape may be subject to creep by excessive pressing.

Therefore, the invention has the following beneficial effects: the manufacturing and detecting processes and initial investment of the vehicle battery pack part can be simplified, so that the production cost is reduced, the production beat of the whole vehicle is accelerated, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of one configuration of the vehicle body of the present invention.

Fig. 2 is a schematic view of a structure of the battery tray of the present invention.

Fig. 3 is a schematic view of a connection structure of the battery tray and the vehicle body.

Fig. 4 is a partially enlarged schematic view of fig. 3.

In the figure: 1. the vehicle body 11, the upper sealing surface 111, the bolt through hole 12, the inner threshold 13, the threshold reinforcing panel 2, the battery tray 21, the lower sealing surface 3, the sealing strip 31, the bolt through hole 311, the counter bore 32, the upper side 33, the lower side 34, the left side 35, the side 36, the gas tube 361, the neck 4, the projection welding nut 5, the limiting steel sleeve 51, the guide chamfer 6 and the fastening bolt.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

As shown in fig. 1, 2, 3 and 4, a battery tray sealing structure includes a vehicle body 1, a battery tray 2 having a battery module (not shown) therein and having an upper opening, an annular lower sealing surface 21 is arranged at the edge of the battery tray, an upper sealing surface 11 opposite to the lower sealing surface is arranged at the lower side of the vehicle body, a sealing strip 3 is arranged between the upper sealing surface and the lower sealing surface, a plurality of bolt through holes 111 which are arranged at intervals are respectively arranged on the upper sealing surface and the lower sealing surface, a projection welding nut 4 is arranged at the back of the upper sealing surface corresponding to the bolt through hole, a bolt through hole 31 is arranged at the sealing strip corresponding to the bolt through hole, a limiting steel sleeve 5 is embedded at one end of the bolt through hole close to the lower sealing surface, and a fastening bolt 6 which sequentially penetrates through the bolt through hole of the lower sealing surface, the limiting steel sleeve and the bolt through hole on the sealing strip and the bolt through hole of the upper sealing surface from bottom to top and is in threaded connection with the projection welding nut is arranged on the battery tray.

That is, we can assemble the battery module into the battery tray in-line and then place and position the sealing tape at the lower sealing surface, thereby forming an open-top battery pack assembly. When the whole vehicle is assembled, only the battery pack assembly with the opening at the upper part is assembled to the lower side of the vehicle body through the fastening bolt, the sealing strip at the moment can realize the sealing between the upper sealing surface and the lower sealing surface, so that the upper shell of the existing battery pack can be omitted, then the parts are reduced, the production cost is reduced, and the battery pack assembly can be assembled and detected on line in advance, so that the assembling beat of the whole vehicle cannot be influenced due to the overlong assembling time of the battery pack assembly.

It should be noted that, the existing vehicle body for fixing the battery pack is generally a rivet nut, which not only needs a special roughening device, but also has a high axial height, which affects effective utilization of the vehicle body bottom space. The projection welding nut is arranged at the position, corresponding to the bolt through hole, on the back surface of the upper sealing surface, so that the nut fixing strength is ensured, the processing and the manufacturing are convenient, the axial height is reduced, and the space at the bottom of the vehicle body is more compact.

In addition, the limiting steel sleeve arranged in the bolt through hole of the sealing strip can effectively prevent the fastening bolt from damaging the sealing strip when the fastening bolt penetrates through the bolt through hole, and the sealing effect of the sealing strip is ensured.

Preferably, the sealing strip is bonded to the lower sealing surface, so that the sealing strip is prevented from being displaced when the battery pack assembly is assembled to the vehicle body, and the battery tray of the sealing strip is conveniently fixed.

In addition, one end of the bolt through hole, which is close to the lower sealing surface, can be provided with a counter bore 311, and when the sealing strip is molded, the limiting steel sleeve can be embedded in the counter bore as an insert, so that the sealing strip is tightly attached to the upper sealing surface and the lower sealing surface, the sealing effect of the sealing strip is favorably ensured, and the displacement and the falling off of the limiting steel sleeve can be avoided.

Furthermore, the counter bore can be made into a conical bore with a large opening and a small bottom, and correspondingly, the limiting steel sleeve is conical in shape, so that the limiting steel sleeve is conveniently embedded in the counter bore. And the diameter of the opening of the counter bore is 2-3mm larger than that of the bottom, the preferred value is 2.5mm, the depth of the counter bore is 2-3mm, and the preferred value is 2.5 mm. Therefore, when the sealing strip is extruded, the outer side surface of the limiting steel sleeve can form a downward extrusion component force on the sealing strip, so that the sealing strip can be tightly attached to the upper sealing surface and the lower sealing surface, and the limiting steel sleeve is prevented from generating relative displacement in the counter bore.

Furthermore, the compression amount of the sealing strip can be controlled between 40% and 60% of the thickness of the sealing strip, and the sealing strip is convenient to assemble on the premise of ensuring good sealing effect.

Certainly, the opening end of the inner hole of the limiting steel sleeve can be provided with a guide chamfer 51, so that the fastening bolt can conveniently penetrate through the inner hole of the limiting steel sleeve, and the assembly efficiency can be improved.

As a preferable scheme, the vehicle body comprises an inner doorsill 12, the inner doorsill is provided with the upper sealing surface, a doorsill reinforcing plate 13 is welded on the upper side of the inner doorsill, and the projection welding nuts are welded on the doorsill reinforcing plate, so that the fixing strength and rigidity of the projection welding nuts can be effectively improved, and the reliable connection of the battery pack assembly and the vehicle body is ensured.

In order to ensure the sealing effect of the sealing strip, the sealing strip is a silicon foaming rubber strip so as to ensure that the sealing strip has good elasticity and long-term effectiveness. In addition, the cross section of sealing strip is the rectangle, and the width of sealing strip is 25 ± 5mm, and thickness is 5 ± 2mm, and preferably, the width of sealing strip is 25mm, and thickness is 5mm, both can ensure that the sealing strip has sufficient compressive capacity and laminating area, ensure its sealed effect then, form the compression to the sealing strip when being convenient for again battery package assembly assembles.

Of course, in order to increase the fixing strength of the sealing strip, the sealing strip can be glued and sealed for the second time on the side surface after being locked.