CN213649312U

CN213649312U - Battery case mounting structure of electric automobile

Info

Publication number: CN213649312U
Application number: CN202022578249.4U
Authority: CN
Inventors: 刘妍妍; 郑超; 杜文灿
Original assignee: FAW Volkswagen Automotive Co Ltd
Current assignee: FAW Volkswagen Automotive Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-07-09
Anticipated expiration: 2030-11-10

Abstract

The utility model provides an electric automobile battery case mounting structure, strengthen fixed frame including battery package casing and battery package. The battery shell comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably connected and enclose a battery cavity for placing a battery; the upper shell is provided with an upper sealing edge around the periphery, and the lower shell is provided with a lower sealing edge around the periphery; the lower surface of the upper sealing edge is divided into a first sealing surface close to the outer side part and a second sealing surface close to the inner side part; the first sealing surface is tightly attached to the lower sealing edge, a gap is formed between the second sealing surface and the lower sealing edge, and the gap is filled with foaming cotton. The fixed frame is fixed on the automobile body is strengthened to the battery package, and the middle part is formed with battery package casing accommodation space, and battery package casing detachably connects on fixed frame is strengthened to the battery package. The battery shell mounting structure can not only ensure the light weight requirement of the battery pack, improve the energy density of the battery pack, but also meet the requirement of a higher-standard whole vehicle.

Description

Battery case mounting structure of electric automobile

Technical Field

The utility model relates to an electric automobile technical field, concretely relates to electric automobile battery case mounting structure.

Background

The energy density is one of the vital parameters of the current electric vehicle, in order to improve the energy density of the battery pack, one direction is to improve the total energy of the battery pack, the other direction is to reduce the weight of the battery pack, wherein the weight reduction of the battery pack shell is an important direction. The shell of the battery pack cannot reduce weight at one step, the shell is used as a protective cover of the battery pack and is a key part of an electric automobile, and the safety, reliability and durability of the shell are important for the electric automobile and determine the performance of the whole automobile.

In addition, when the weight of the battery pack shell is reduced, the firm connection between the battery pack shell and the vehicle body is guaranteed, and the important influence on the driving safety is also achieved. Further, recycling of the battery pack case and the mounting structure thereof is also one of the current research directions.

In view of the above problems, the inventor of the present invention has finally obtained the present invention through long-term research and practice.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an electric automobile battery case mounting structure, its lightweight requirement that had both guaranteed battery package itself can satisfy the whole car requirement of higher standard again, ensures whole car safety.

The utility model discloses a technical scheme lie in:

the battery shell mounting structure of the electric automobile comprises a battery pack shell and a battery pack reinforcing and fixing frame;

the battery shell comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably connected and enclose a battery cavity for placing a battery; the upper shell is provided with an upper sealing edge around the periphery, and the lower shell is provided with a lower sealing edge around the periphery; the lower surface of the upper sealing edge is divided into a first sealing surface close to the outer side part and a second sealing surface close to the inner side part; the first sealing surface is tightly attached to the lower sealing edge, a gap is formed between the second sealing surface and the lower sealing edge, and foaming cotton is filled in the gap;

the battery pack reinforcing and fixing frame is fixed on the vehicle body, the top surface of the battery pack reinforcing and fixing frame is open, the bottom surface of the battery pack reinforcing and fixing frame is closed, the middle part of the battery pack reinforcing and fixing frame is provided with an accommodating space for accommodating the battery pack shell, and the battery pack shell is detachably connected to the battery pack reinforcing and fixing frame.

Further, fixed frame is strengthened to battery package is including strengthening frame and bottom reinforcing plate, the bottom reinforcing plate is fixed in the bottom of strengthening the frame forms the closed bottom surface, it forms to strengthen the frame the lateral wall of accommodation space, the last sealed limit of battery package casing and lower sealed limit detachably connect in strengthen the top surface of frame.

Furthermore, FDS screws sequentially penetrate through the first sealing surface of the upper sealing edge, the lower sealing edge and the top surface of the reinforcing frame to fix the battery pack shell on the battery pack reinforcing and fixing frame, and the first sealing surface is tightly attached to the lower sealing edge to form sealing.

Furthermore, the foamed cotton is adhered to the second sealing surface and is connected with the lower sealing edge in a compression joint mode through the upper sealing edge and the lower sealing edge to form a sealing structure.

Further, the bottom reinforcing plate comprises a bottom plate and a reinforcing beam, and the reinforcing beam is fixed on the bottom plate.

Furthermore, the reinforcing beams are arranged in parallel at equal intervals, the reinforcing beams and the bottom plate are fixed by laser welding, the bottom plate and the reinforcing frame are fixedly connected by FDS screws, and the reinforcing beams and the reinforcing frame are fixed by welding.

Furthermore, a fixing module is fixed on the bottom surface of the battery cavity, a through hole is formed in the reinforcing beam corresponding to the fixing module, a threaded hole is formed in the joint of the fixing module and the bottom surface of the battery cavity, and a fixing bolt penetrates through the through hole in the reinforcing beam to be in threaded connection with the fixing module, so that the reinforcing beam is fixedly connected with the battery can shell.

Further, the fixing modules are arranged at intervals along two sides of the battery cavity.

Further, the material of the upper shell and the lower shell is 5-series aluminum plates.

Furthermore, the reinforced fixing frame of the battery pack is made of steel, and the foamed cotton is polyurethane foamed cotton.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses an electric automobile battery case mounting structure makes battery package casing weight reduce as far as possible, can effectively improve battery package energy density.

2. The utility model discloses an electric automobile battery case mounting structure adopts the battery package of special construction to strengthen fixed frame, has both ensured the safe and reliable of battery package casing, makes the battery package casing be connected more firmly with the automobile body again, has ensured safety requirements such as whole car bump and trafficability characteristic.

3. The utility model discloses an electric automobile battery case mounting structure makes battery package casing and battery package strengthen fixed frame two parts and possesses the detachability, but reuse battery package casing and strengthen fixed frame structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a structural exploded view of a battery case mounting structure of an embodiment of the present invention;

fig. 2 shows a schematic structural view of a battery pack case according to an embodiment of the present invention;

FIG. 3 is a cross-sectional block diagram of the location B-B in FIG. 2;

fig. 4 shows a schematic structural view of a reinforced frame according to an embodiment of the present invention;

fig. 5 shows a schematic structural view of a bottom stiffener according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a battery pack reinforcing and fixing frame according to an embodiment of the present invention;

FIG. 7 shows a cross-sectional block diagram of the C-C location of FIG. 6;

FIG. 8 is a cross-sectional block diagram of the D-D location of FIG. 6;

fig. 9 shows a top view of a battery case mounting structure of an embodiment of the present invention;

FIG. 10 is a cross-sectional structural view showing the position E-E in FIG. 9;

fig. 11 is a sectional structural view showing a position F-F in fig. 9.

Detailed Description

The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, the inner side is the side close to the battery cavity, and the outer side is the side close to the outside of the mounting structure.

As shown in fig. 1, the battery case mounting structure for an electric vehicle includes a battery pack case 1 and a battery pack reinforcing fixing frame 3. The battery pack housing includes an upper case 11 and a lower case 12, and the upper case 11 and the lower case 12 are detachably coupled to each other and enclose a battery chamber 2 for housing a battery. Preferably, the upper shell 11 and the lower shell 12 are made of 5 series aluminum plates, and the 5 series aluminum plates are light in weight, good in corrosion resistance, high in plasticity, good in processability, good in heat conductivity and strong in pressure resistance. The weight of the battery pack shell is reduced, and other performance indexes of the battery pack shell are met. Fixed frame 3 is strengthened to the battery package is fixed on the automobile body, and its top surface is open, and the bottom surface is sealed, and the middle part is formed with the accommodation space that is used for holding battery package casing 1, and battery package casing 1 detachably connects on fixed frame 3 is strengthened to the battery package.

Utilize the battery package to strengthen fixed frame 3 and the automobile body is fixed integrative structure of formation alone, can conveniently fix, make the connection more firm, and then guarantee battery package casing 1 and the reliability of being connected of automobile body, guarantee safety of traveling. And peripheral protection is formed to battery package casing 1, strengthens security, reliability and durability for battery package casing 1 weight reduces as far as possible, can effectively improve battery package energy density. The battery pack shell 1 and the battery pack reinforcing and fixing frame 3 have detachability, and the battery pack shell and the reinforcing and fixing frame structure can be repeatedly utilized.

As shown in fig. 2 and 3, the upper case 11 of the battery pack case 1 is formed with an upper sealing rim 111 around the periphery thereof, and the lower case 12 is formed with a lower sealing rim 121 around the periphery thereof; the lower surface of the upper sealing edge 111 has a first sealing surface 1112 on the outboard side and a second sealing surface 1111 on the inboard side. A gap is reserved between the second sealing surface 111 and the lower sealing edge 121, the second sealing surface 1111 region is subjected to laser cleaning treatment (the adhesive force of the aluminum plate is increased), and then polyurethane foam is bonded. The first sealing surface 1112 area of the upper sealing edge 111 is provided with an FDS through hole, an FDS screw penetrates through the FDS through hole, and the first sealing surface 1112 of the upper sealing edge 111 and the lower sealing edge 121 are tightly attached and connected through an FDS connection technology at a torque of 8 Nm. Meanwhile, the second sealing surface 1111 presses the polyurethane foam to the lower sealing edge 121, and further sealing is formed by utilizing the compression resilience of the polyurethane foam. The upper and

lower casings

11, 12 are connected by FDS and the compression resilience of the foam ensures the sealing and corrosion prevention of the casings. Through the special design of the battery pack shell 1, the weight of the shell is reduced as much as possible, and meanwhile, the sealing and corrosion prevention requirements of the shell are guaranteed.

As shown in fig. 4 to 8, the middle of the pack reinforcing and fixing frame 3 is formed with an accommodating space for accommodating the pack case 1. The battery pack reinforcing and fixing frame 3 includes a reinforcing rim 31 and a bottom reinforcing plate 32. The bottom reinforcing plate 32 is fixed to the bottom end of the reinforcing frame 31 to form a closed bottom surface, and the reinforcing frame 31 forms a side wall of the accommodating space. The bottom reinforcing plate 32 includes a bottom plate 321 and a reinforcing beam 322, and the reinforcing beam 322 is fixed to the bottom plate 321. The material of the bottom reinforcement plate 32 is a steel plate. The reinforcing beams 322 are arranged in parallel at equal intervals, and the side edges of the reinforcing beams are connected with the combination area A of the bottom plate through laser welding to form an integral structure.

In order to reduce the weight on the basis of ensuring the strength, the reinforced frame 31 is formed by spot welding bent steel plates, the reinforced frame 31 is of a hollow structure, a first reinforced rib plate 311 is welded in a cavity of the vertical part, and a second reinforced rib plate 312 is welded in a cavity of the horizontal part, so that the strength of the reinforced frame 31 is enhanced. The bottom plate 321 of the bottom reinforcing plate 32 is fixedly connected with the bottom of the reinforcing frame 31 through the FDS screws 33. The reinforcing beam 322 is welded and fixed with the bottom of the reinforcing frame 31. The double fixation of the bottom plate 321, the reinforcing beam 322 and the reinforcing frame 31 ensures the overall strength of the battery pack reinforcing and fixing frame 3.

As shown in fig. 9 and 11, the upper sealing edge 111 of the upper case 11 and the lower sealing edge 121 of the lower case 12 of the battery pack case 1 are detachably attached to the top surface of the reinforcing frame 31. In a specific embodiment, the FDS screws 13 sequentially penetrate through the first sealing surface 1112 of the upper sealing edge 111, the lower sealing edge 121, and the top surface of the reinforcing frame to fix the battery pack case 1 to the battery pack reinforcing and fixing frame 3. It is understood that the sealing connection between the upper and

lower cases

11, 12 of the battery pack case 1 and the connection of the battery pack case 1 to the top surface of the reinforcing frame 31 are simultaneously accomplished through the FDS connection process. The detachable connection is realized while the sealing is ensured. Preferably, the top of the reinforcing frame 31 is an overlapped joint of the bent steel plates, so that the thickness of the top of the reinforcing frame 31 is increased, and the connection between the reinforcing frame and the battery pack case 1 is firmer.

As shown in fig. 1 and 10, a plurality of fixing modules 21 are fixed to the bottom surface of the battery cavity 2 of the battery pack case 1, and the fixing modules 21 are arranged at equal intervals along both sides of the battery cavity 2. The bottom surface of the fixed module 21 is tightly attached to the bottom surface of the battery cavity 2, a threaded hole is formed in the attachment area, the threaded hole penetrates through the bottom surface of the battery cavity 2 and extends into the fixed module 21, and the battery cavity 2 is sealed and isolated from the threaded hole through tight attachment of the bottom surface of the fixed module 21 and the bottom surface of the battery cavity 2. The position of the reinforcing beam 322 corresponding to the fixing module 21 is provided with a through hole, a stud bolt passes through the through hole and is in threaded connection with a threaded hole of the fixing module 21, and the lower end of the stud bolt is fixed by matching with a nut. The reinforcing beam 322 is fixedly connected to the battery pack case 1 without damaging the sealing performance in the battery cavity 2 of the battery pack case 1. Preferably, the fixing module 21 is also fixedly connected to the side wall of the battery cavity 2, so that the reliability of the connection between the reinforcing beam 322 and the battery pack case 1 is improved. This connection structure makes and forms good detachability, easy dismounting between battery package casing 1 and the battery package strengthens fixed frame 3. Through detachable battery package casing and fixed frame structure of strengthening, both guaranteed the national standard experiment requirement of battery package itself, can satisfy the whole car requirement of higher standard again, ensure whole car safety.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative, not limiting. The utility model discloses in all can change to some extent structure and connected mode etc. of each part all be in the utility model discloses equal transform and the improvement of going on technical scheme's the basis all should not get rid of the utility model discloses an outside the protection scope.

Claims

1. A battery shell mounting structure of an electric automobile is characterized by comprising a battery pack shell and a battery pack reinforcing and fixing frame;

2. The battery pack case mounting structure according to claim 1, wherein the battery pack reinforcing and fixing frame includes a reinforcing frame and a bottom reinforcing plate, the bottom reinforcing plate is fixed to a bottom end of the reinforcing frame to form a closed bottom, the reinforcing frame forms a sidewall of the accommodating space, and an upper sealing edge and a lower sealing edge of the battery pack case are detachably connected to a top surface of the reinforcing frame.

3. The battery pack case mounting structure according to claim 2, wherein FDS screws penetrate the first sealing surface of the upper sealing edge, the lower sealing edge and the top surface of the reinforcing frame in this order to fix the battery pack case to the battery pack reinforcing and fixing frame, and the first sealing surface and the lower sealing edge are tightly fitted to form a seal.

4. The battery case mounting structure for electric vehicles according to claim 3, wherein the foam is bonded to the second sealing surface and is pressed against the lower sealing edge by the connection of the upper and lower sealing edges to form a sealing structure.

5. The battery case mounting structure for electric vehicles according to any one of claims 2 to 4, wherein the bottom reinforcing plate includes a bottom plate and a reinforcing beam, and the reinforcing beam is fixed to the bottom plate.

6. The battery case mounting structure of claim 5, wherein the plurality of reinforcing beams are arranged in parallel and at equal intervals, the reinforcing beams are fixed to the bottom plate by laser welding, the bottom plate is fixedly connected to the reinforcing frame by FDS screws, and the reinforcing beams are fixed to the reinforcing frame by welding.

7. The battery housing mounting structure of claim 5, wherein a fixing module is fixed to a bottom surface of the battery cavity, a through hole is formed in the reinforcing beam at a position corresponding to the fixing module, a threaded hole is formed at a connection portion of the fixing module and the bottom surface of the battery cavity, and a fixing bolt is threaded through the through hole in the reinforcing beam to be connected with the fixing module, so that the reinforcing beam is fixedly connected with the battery housing body.

8. The battery case mounting structure for electric vehicles according to claim 7, wherein the fixing modules are plural and are uniformly spaced along both sides of the battery cavity.

9. The battery case mounting structure for electric vehicles according to claim 1, wherein the material of the upper case and the lower case is 5-series aluminum plate.

10. The battery case mounting structure for electric vehicles according to claim 9, wherein the reinforcing fixing frame of the battery pack is made of steel, and the foam is polyurethane foam.