CN206451738U - Vapour Vehicular dynamic battery bag sealing structure - Google Patents

Abstract

The utility model provides a sealing structure for a power battery pack for an automobile, which includes a sealing cover, a sealing gasket, a tray panel, a pressing plate and a fixing component. The upper sealing edge of the tray panel includes a main body of the tray panel and a lower sealing edge extending from the top of the main body of the tray panel to the surroundings. The pressure plate, the upper sealing edge and the lower sealing edge are arranged from top to bottom Stacked in sequence, the sealing gasket is arranged between the upper sealing edge and the lower sealing edge, and the fixing component fixes the pressing plate, the upper sealing edge, the sealing gasket and the lower sealing edge together. The sealing structure of the power battery pack for automobiles of the utility model has good sealing effect.

Description

Automotive power battery pack sealing structure

technical field

The utility model relates to the technical field of power batteries for automobiles, in particular to a sealing structure of power battery packs for automobiles.

Background technique

The power battery pack is the only source of power energy for pure electric vehicles at present. As the core component of pure electric vehicles, the safety of the battery pack directly affects the safety of the entire vehicle. Therefore, the sealing performance of the battery pack must meet the IP67 standard. The sealing structure design of the bag puts forward higher requirements.

As shown in FIG. 1 , the sealing structure of the battery pack in the prior art includes a mounting beam 101 , a tray panel 102 , an outer reinforcing plate 103 , a sealing strip 104 , mounting bolts 105 and welding nuts 106 .

The welding nut 106 is pre-welded on the mounting beam 101 by a fixed spot welder to provide a battery pack installation point, and the outer reinforcement plate 103 is welded on the tray panel 102 to form a battery tray assembly. Before the battery pack is installed, the sealing strip 104 is pre-laid in the sealing groove of the tray panel 102, and the battery pack is installed on the installation beam 101 through the installation bolt 105. When the installation bolt 101 is tightened, the tray panel 102 and the installation beam 101 Squeeze the sealing strip 104 to meet the sealing requirements of the battery pack.

The battery pack sealing structure in the prior art has the following disadvantages:

1. The sealing surface and the installation surface are coplanar. Due to the vibration of the battery pack during the driving of the vehicle, the sealing gap between the tray panel and the installation beam will change continuously, so that the compression of the sealing strip will also change accordingly. Because the sealing performance of the sealing strip requires a certain amount of compression to ensure, it is difficult to guarantee the sealing performance of this structure, and may even fail.

2. During the stamping process of the pallet panel, it is difficult to ensure the accuracy of the sealing groove features. This factor will also directly affect the uneven compression of the sealing strip, which will affect the sealing performance of the structure; moreover, the sealing strip can only be made of rubber materials. , its aging resistance and failure cycle are much shorter than the 6-year 150,000-kilometer warranty period of the battery pack. During this period, if the sealing strip is replaced, it will cost a lot of manpower, material resources and time.

3. The installation point of the battery pack in this structure is only composed of two layers of sheet metal. Due to the heavy weight of the battery pack, when the vehicle is driving in complex road conditions, it will cause deformation of the installation hole, fatigue cracking and other failures, which will eventually lead to installation and sealing. Completely ineffective.

Utility model content

The purpose of the utility model is to provide a sealing structure of a power battery pack for an automobile to solve the above-mentioned technical problems.

The embodiment of the utility model provides a sealing structure for a power battery pack for automobiles, including a sealing cover, a sealing gasket, a tray panel, a pressure plate and a fixing component. The sealing cover includes a main body of the sealing cover and a The upper sealing edge formed by extension, the tray panel includes the main body of the tray panel and the lower sealing edge formed by extending from the top of the main body of the tray panel to the surroundings, the pressure plate, the upper sealing edge and the lower sealing edge are formed from the upper And the bottom is stacked in turn, the sealing gasket is arranged between the upper sealing edge and the lower sealing edge, and the fixing component seals the pressure plate, the upper sealing edge, the sealing gasket and the lower sealing edge. The sides are fixed together.

Further, an end of the lower sealing edge away from the main body of the tray panel extends downwards to form a stepped flange.

Further, the sealing structure of the battery pack further includes an outer reinforcing plate, and the outer reinforcing plate is welded on the bottom of the flange.

Further, the sealing structure of the battery pack includes a mounting seat plate, a backup plate and a support sleeve, the two ends of the support sleeve are respectively welded to the backup plate and the mounting seat plate, and the backup plate is located on the The top of the seat plate is installed and welded on the bottom of the flange.

Further, the fixing assembly includes blind rivet nuts and mounting bolts, and the mounting bolts pass through the pressure plate, the sealing gasket, the upper sealing plate and the lower sealing edge and are locked into the blind rivet nuts. Inside, the pressure plate, the upper sealing edge, the sealing gasket and the lower sealing edge are fixed together.

Further, the number of the fixing components is multiple, the sealing gasket, the upper sealing plate and the lower sealing edge are all provided with a plurality of via holes for the mounting bolts to pass through at intervals, along the In the extending direction of the length of the upper sealing plate, the distance between two adjacent via holes is 100mm-150mm.

Further, the material of the gasket is silicone foam.

Further, a single-sided adhesive is provided on the surface of the gasket that is attached to the lower sealing flange. .

The beneficial effects of the utility model are:

1. The utility model adopts a structure in which the sealing surface is separated from the installation surface of the battery pack. Only in this way can the self-sealing design of the battery pack be truly realized, and the entire battery pack can be avoided due to vibration of the battery pack and local deformation of the installation point. At the same time, the separated mounting point adopts the structural form of mounting seat, support sleeve and backup plate, which effectively improves the local strength and rigidity of the battery pack mounting point, thereby further reducing the probability of battery pack seal failure. A self-sealing cover is added to realize the self-sealing of the battery pack, avoiding the risk of sealing due to the limitation of the installation structure of the vehicle body.

2. The utility model adopts the sealing gasket of closed silicone foam, which saves the mold opening cost of the rubber gasket, and at the same time greatly improves the sealing stability, prolongs the service life of the gasket, and can also achieve the effect of weight reduction. It is to avoid the work of disassembling the battery pack, opening the sealing cover, dismantling the wiring and water pipes (the cooling system needs to be vacuumed and filled) due to the failure of the gasket, which requires a lot of manpower, material and resources. The cost of time, but also affect the reputation of the product brand.

3. The fasteners of the sealing surface of the pallet panel in the utility model adopt blind hole riveting nuts, which can not only avoid the local deformation of the sealing surface of the pallet panel and the increased installation workload caused by welding nuts and mounting nuts, but also The thickness of the flat head of the flange of the riveting nut can be used to precisely control the compression of the gasket to completely control the sealing risk of the battery pack, and it can also save the increased development cost due to the newly developed metal guide sleeve.

4. In the utility model, a mounting platen with high rigidity is added on the sealing surface of the upper cover to prevent the deformation and failure of the sealing cover at the installation point and the local arching of the sealing cover between the installation points, and to make the sealing gasket each The amount of compression should be as uniform as possible to ensure the stability of the seal.

Description of drawings

FIG. 1 is a partial schematic diagram of a cross-sectional structure of a sealing structure of a power battery pack for an automobile in the prior art.

Fig. 2 is a partial structural schematic diagram of a cross-section of a sealing structure of a power battery pack for an automobile according to an embodiment of the present invention.

Fig. 3 is another partial schematic diagram of the cross-sectional structure of the sealing structure of the automotive power battery pack according to the embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the following will further describe the implementation of the utility model in conjunction with the accompanying drawings.

Fig. 2 is a partial schematic cross-sectional structure of the sealing structure of the automotive power battery pack according to the embodiment of the utility model, wherein the sealing part of the sealing structure of the battery pack can be seen at the cut position in Fig. 2 . Please refer to FIG. 2 , the embodiment of the present invention provides a battery pack sealing structure, including a sealing cover 1 , a sealing gasket 6 , a tray panel 2 , a pressing plate 5 and a plurality of fixing components.

The sealing cover 1 includes a sealing cover main body 10 and an upper sealing edge 11 extending from the bottom of the sealing cover main body 10 to the surroundings. The tray panel 2 includes a tray panel body 20 and a lower sealing edge 21 extending from the top of the tray panel body 20 to the surroundings. The pressing plate 5, the upper sealing edge 11 and the lower sealing edge 21 are stacked sequentially from top to bottom, the sealing gasket 6 is arranged between the upper sealing edge 11 and the lower sealing edge 21, and the fixing assembly connects the pressing plate 5, the upper sealing edge 11, the sealing gasket 6 and the lower sealing edge 21 are fixed together.

In this embodiment, the end of the lower sealing edge 21 away from the tray panel main body 10 extends downwards to form a stepped flange 22 to improve the flatness accuracy of the lower sealing edge 21 and improve the rigidity of the lower sealing edge 21 to prevent The lower sealing edge 21 is deformed due to bumps and the like during logistics and installation.

In this embodiment, the sealing structure of the battery pack further includes an outer reinforcing plate 3 welded to the bottom of the flange 22 to enhance the structural strength of the tray panel 2 .

In this embodiment, the fixing assembly includes a blind hole riveting nut 4 and a mounting bolt 7, and the mounting bolt 7 penetrates the pressure plate 5, the sealing gasket 6, the upper sealing plate 11 and the lower sealing edge 21 and is locked into the blind hole riveting nut 4, and the The pressing plate 5, the upper sealing edge 11, the gasket 6 and the lower sealing edge 21 are fixed together.

In this embodiment, the number of fixing components is multiple, and the sealing gasket 6, the upper sealing plate 11 and the lower sealing edge 21 are evenly provided with a plurality of via holes for the mounting bolts 7 to pass through, and along the upper sealing plate In the extending direction of the length of 11, the distance between two adjacent via holes is 100 mm to 150 mm, so as to ensure the uniformity of the compression amount of the gasket 6 .

Let the thickness of the gasket 6 be a, and the thickness of the flange of the blind riveting nut 4 be b, then let the compression amount of the gasket 6 be W, and W=a-b/a*100% will be satisfied between the three, which can be passed Reasonably design the thickness a of the gasket 6 and the thickness b of the flat head of the flange of the blind rivet nut 4 to accurately control the compression amount of the gasket 6 to control the sealing performance. In addition, the width of the gasket 6 inside the blind rivet nut 4 is the width of the effective sealing surface. According to the material properties of the gasket, the widths of the effective upper sealing flange 11 and the lower sealing flange 21 are reasonably selected to ensure the sealing performance. Preferably, in this embodiment, the sealing gasket 6 is made of silicone foam. Further, a single-sided adhesive is provided on the surface of the sealing gasket 6 that is bonded to the lower sealing flange 21 to facilitate bonding with the lower sealing flange 21 .

Fig. 3 is another partial schematic diagram of the cross-sectional structure of the sealing structure of the automotive power battery pack according to the embodiment of the present invention, where the installation part of the sealing structure of the battery pack can be seen at the section in Fig. 3 . Please refer to FIG. 3 . In this embodiment, the sealing structure of the battery pack includes a mounting seat plate 8 , a backup plate 9 and a supporting sleeve 10 . The two ends of the support sleeve 10 are welded together with the spare plate 9 and the mounting seat plate 8 respectively. The spare plate 9 is located above the mounting seat plate 8 and welded on the bottom of the flange 22 to provide a mounting point for the battery pack. The seat plate 8, the backup plate 9 and the support sleeve 10 together form a three-dimensional mounting seat structure. The structure of the mounting seat structure is strong and rigid, and the mounting seat is not easy to deform or fail when it is impacted, thereby reducing the risk of seal failure.

The beneficial effects of the utility model are:

1. The utility model adopts a structure in which the sealing surface is separated from the installation surface of the battery pack. Only in this way can the self-sealing design of the battery pack be truly realized, and the entire battery pack can be avoided due to vibration of the battery pack and local deformation of the installation point. At the same time, the separated mounting point adopts the structural form of mounting seat, support sleeve and backup plate, which effectively improves the local strength and rigidity of the battery pack mounting point, thereby further reducing the probability of battery pack seal failure. A self-sealing cover is added to realize the self-sealing of the battery pack, avoiding the risk of sealing due to the limitation of the installation structure of the vehicle body.

2. The utility model adopts the sealing gasket of closed silicone foam, which saves the mold opening cost of the rubber gasket, and at the same time greatly improves the sealing stability, prolongs the service life of the gasket, and can also achieve the effect of weight reduction. It is to avoid the work of disassembling the battery pack, opening the sealing cover, disassembling the wiring and water pipe cooling system due to the failure of the gasket, which requires a lot of manpower, material resources and time. cost, but also affect the reputation of the product brand.

3. The fasteners of the sealing surface of the pallet panel in the utility model adopt blind hole riveting nuts, which can not only avoid the local deformation of the sealing surface of the pallet panel and the increased installation workload caused by welding nuts and mounting nuts, but also The thickness of the flat head of the flange of the riveting nut can be used to precisely control the compression of the gasket to completely control the sealing risk of the battery pack, and it can also save the increased development cost due to the newly developed metal guide sleeve.

4. The utility model adds a mounting platen with higher rigidity on the upper sealing edge of the sealing cover to prevent deformation failure of the sealing cover at the installation point and partial arching of the sealing cover between the installation points, and to make the sealing gasket The amount of compression everywhere is as uniform as possible to ensure the stability of the seal.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. a kind of vapour Vehicular dynamic battery bag sealing structure, it is characterised in that including closure (1), sealing gasket (6), pallet face Plate (2), pressing plate (5) and fixation kit, the closure (1) include cap body (10) and from the cap body (10) The bottom upper sealing strip (11) to be formed to extending around, the tray panel (2) includes tray panel main body (20) and from institute State the top of tray panel main body (20) the lower sealing strip (21) to be formed to extending around, the pressing plate (5), the upper sealing strip (11) be sequentially stacked from top to bottom with the lower sealing strip (21), the sealing gasket (6) be arranged at the upper sealing strip (11) with Between the lower sealing strip (21), the fixation kit is by the pressing plate (5), the upper sealing strip (11), the sealing gasket (6) And the lower sealing strip (21) is fixed together.

2. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 1, it is characterised in that the lower sealing strip (21) is remote One end from the tray panel main body (20) is downwardly extending step-like flange (22).

3. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 2, it is characterised in that the battery bag sealing structure Also include external reinforcing plate for car (3), the external reinforcing plate for car (3) is welded on the bottom of the flange (22).

4. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 2, it is characterised in that the battery bag sealing structure Including installation seat plate (8), slave board (9) and support set, the two ends of the support set respectively with the slave board (9) and the mounting seat Plate (8) welds together, and the slave board (9) is located at the top of the installation seat plate (8) and is welded on the bottom of the flange (22) In portion.

5. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 1, it is characterised in that the fixation kit includes blind Hole riveting nut (4) and installation bolt (7), the installation bolt (7) wears the pressing plate (5), the sealing gasket (6), described Upper sealing strip (11) and the lower sealing strip (21) are locked in the blind hole riveting nut (4), by the pressing plate (5), it is described on Sealing strip (11), the sealing gasket (6) and the lower sealing strip (21) are fixed together.

6. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 5, it is characterised in that the quantity of the fixation kit To be multiple, the sealing gasket (6), the upper sealing strip (11) and compartment of terrain is provided with multiple confession institutes on the lower sealing strip (21) State the via that installation bolt (7) is worn, along the length bearing of trend of the upper sealing strip (11), the two neighboring via it Between spacing in 100mm~150mm.

7. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 1, it is characterised in that the material of the sealing gasket (6) Matter is silica gel foam.

8. vapour Vehicular dynamic battery bag sealing structure as claimed in claim 1, it is characterised in that the sealing gasket (6) with The face of lower sealing strip (21) laminating is provided with one side glue.