CN111590922A

CN111590922A - Composite material battery box body and manufacturing method thereof

Info

Publication number: CN111590922A
Application number: CN202010442273.7A
Authority: CN
Inventors: 谈源; 徐华; 汤娟; 王小清; 钱亚刚; 李嘉俊
Original assignee: Changzhou Xinchuang Intelligent Technology Co Ltd
Current assignee: Changzhou New Intelligent Technology Co Ltd; Changzhou Xinchuang Intelligent Technology Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-08-28
Anticipated expiration: 2040-05-22
Also published as: CN111590922B

Abstract

The invention belongs to the technical field of battery box bodies, and particularly relates to a composite material battery box body which comprises: the skin structure is enclosed into a cavity structure for accommodating the storage battery, and at least one end of the cavity structure is an opening for the storage battery to enter; the supporting frame comprises a plurality of supporting structures which are arranged in parallel, and the supporting structures support the inner wall of the skin structure; the door body is arranged at the opening and used for sealing the opening; the skin structure, the supporting structure and the door body are all composite material structures. In the invention, the battery box body made of metal materials is replaced by the composite material structure, the weight of the structure is effectively reduced, in the using process, the whole structure obtains a stable accommodating space through the arrangement of the supporting structure, and the arrangement of the skin structure and the door body enables the whole space to be effectively sealed, so that an independent space for stable work of the storage battery is formed. Meanwhile, the invention also claims a manufacturing method of the composite material battery box body.

Description

Composite material battery box body and manufacturing method thereof

Technical Field

The invention belongs to the technical field of battery box bodies, and particularly relates to a composite material battery box body and a manufacturing method thereof.

Background

The battery hangs equipment under for among the subway train, and the battery case is the frame construction that the installation battery used, and the battery case still need install the slide rail that is used for the pull battery and movable inspection door etc. except main body frame. The existing main frame is made of carbon steel, the trolley, the inner and outer rails, the outer cover plate, the box door and the control box are made of stainless steel, the weight of the whole structure is about 450Kg, each group of batteries installed in the storage battery box is about 394Kg, and the total weight of 2 groups of batteries is about 788Kg, so that how to reduce the weight of the storage battery box becomes a technical problem to be solved urgently by the technical personnel in the field.

In view of the above problems, the present inventors have conducted extensive practical experience and professional knowledge for many years in engineering application of such products, and have conducted active research and innovation in cooperation with the application of theory, in order to create a composite battery case and a method for manufacturing the same, which are more practical.

Disclosure of Invention

The invention aims to provide a composite material battery box body, which effectively reduces the weight of a storage battery box and simultaneously requests to protect a manufacturing method of the composite material battery box body, and the composite material battery box body has the same technical effects.

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

a composite battery case, comprising:

the battery storage device comprises a skin structure, a battery cover and a battery cover, wherein the skin structure is enclosed into a cavity structure for accommodating a storage battery, and at least one end of the cavity structure is an opening for the storage battery to enter;

the supporting frame comprises a plurality of supporting structures which are arranged in parallel, and the supporting structures support the inner wall of the skin structure;

the door body is arranged at the opening and used for sealing the opening;

the skin structure, the supporting structure and the door body are all composite material structures.

Further, each support structure is attached and connected.

Further, each of the support structures is spaced apart.

Further, the support structure comprises a first part and a second part which are both ring-shaped structures, the two parts are butted along a first direction in which the support structures are juxtaposed, wherein at least one part is provided with an open end in the first direction, and the open end is sealed by the other part to form a ring-shaped cavity.

Further, after the first part and the second part are butted, overlapped side wall parts are formed on part of the annular cavity, and the overlapped side wall parts are arranged in an annular shape.

Furthermore, a limiting structure used for limiting the limit position of the contact action is arranged on the first part and/or the second part.

Furthermore, a filling body is at least partially arranged in the annular cavity.

Furthermore, the supporting structure partially penetrates through the skin structure to form a connecting part for mounting the battery box body.

Further, two parallel plane-type inner walls are formed at least on two sides of the width direction of the battery box body on the inner side of the ring of the supporting structure and used for installing a guide rail structure.

Furthermore, a through hole is formed in the planar inner wall, and a connecting piece connected with the guide rail structure is inserted into the through hole; and the supporting structure and the through hole are provided with operating holes communicated with the inside and the outside of the annular cavity at corresponding positions, and the operating holes are used for providing operating positions for fixing the connecting piece.

Furthermore, a local connection part of the skin structure and the support structure is provided with a mounting hole communicated with the inside and the outside of the cavity structure, and the mounting hole is used for a connecting piece connected with the guide rail structure to penetrate through.

Further, the supporting structure is a thin-wall ring structure, and a groove structure is arranged on the outer side of the ring structure.

Furthermore, the groove body structures penetrate through and cover the thin-wall structures along the first direction in which the supporting structures are arranged side by side, and the groove body structures correspondingly arranged on the supporting structures are filled with integrated reinforcing ribs attached to the inner wall of the skin structure.

Furthermore, the support structure is a thin-wall ring structure, a convex edge is arranged in the ring structure, and the convex edge is positioned at the end part of the ring structure in the first direction parallel to the support structures.

Furthermore, the convex edge is provided with mounting hole sites for directly or indirectly mounting the guide rail structure.

A manufacturing method of a composite material battery box body comprises the following steps:

forming a supporting frame: performing layering operation on a prepreg on a mould to enable the prepreg to obtain a profile shape corresponding to the mould, placing the prepreg and the mould in a vacuum bag, performing vacuumizing operation to form an integral structure, and placing the integral structure in a hot-pressing tank for molding;

forming a skin structure: fixing the support frames through a mold, forming surfaces for laying prepreg outside the mold and each support frame, performing prepreg laying operation on the surfaces, placing the prepreg, the support frames and the mold in a vacuum bag, performing vacuumizing operation to form an integral structure, and placing the integral structure in a hot-pressing tank for molding.

Further, the vacuum bag includes an inner fill pocket and an outer wrap pocket.

Through the technical scheme of the invention, the following technical effects can be realized:

in the invention, the battery box body made of metal materials is replaced by the composite material structure, the weight of the structure is effectively reduced, in the using process, the whole structure obtains a stable accommodating space through the arrangement of the supporting structure, and the arrangement of the skin structure and the door body enables the whole space to be effectively sealed, so that an independent space for stable work of the storage battery is formed. Meanwhile, the invention also claims a manufacturing method of the composite material battery box body.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of a composite battery case;

FIG. 2 is a schematic view of a first external structure of a composite battery case;

FIG. 3 is a schematic partial cross-sectional view of a support structure;

FIG. 4 is a schematic view of a first docking mode of the first and second portions;

FIG. 5 is a schematic view of a second mating arrangement of the first and second portions;

FIG. 6 is a schematic view of a third docking mode of the first and second portions;

FIG. 7 is a schematic view of a positioning structure;

FIG. 8 is a schematic view of a first arrangement of the filling body;

FIG. 9 is a schematic view of a second arrangement of the filling body;

FIG. 10 is a schematic view of a first arrangement of the connecting portion (at A in FIG. 1);

FIG. 11 is a schematic view of a second arrangement of the connecting portion;

FIG. 12 is a partial enlarged view of FIG. 11 at B;

FIG. 13 is a schematic view of a second configuration of a composite battery case;

FIG. 14 is an enlarged view of a portion of FIG. 13 at D;

FIG. 15 is an enlarged view of a portion of FIG. 11 at C;

FIG. 16 is a schematic view of a support structure for a thin-walled ring structure;

FIG. 17 is a schematic view of a third external configuration of a composite battery case;

FIG. 18 is an enlarged view of a portion of FIG. 17 at E;

fig. 19 is a cross-sectional view of the composite battery case of fig. 17;

FIG. 20 is an enlarged view of a portion of FIG. 19 at F;

FIG. 21 is an enlarged view of a portion of FIG. 19 at G;

reference numerals: the structure comprises a skin structure 1, a cavity structure 11, a planar inner wall 12, a through hole 12a, an operation hole 12b, a mounting hole 12c, a support structure 2, a first part 21, a second part 22, an open end 23, an annular cavity 24, a limiting structure 25, a filling body 26, a connecting part 27, a groove body structure 28, a convex edge 29, a door body 3, a reinforcing rib 4, an L-shaped plate 5 and a sealing structure 6.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

As shown in fig. 1 and 2, a composite battery case includes: the battery protection device comprises a skin structure 1, a battery protection device and a battery protection device, wherein the skin structure 1 is enclosed into a cavity structure 11 for accommodating a battery, and at least one end of the cavity structure 11 is an opening for the battery to enter; the supporting framework comprises a plurality of supporting structures 2 which are arranged in parallel, and the supporting structures 2 support the inner wall of the skin structure 1; the door body 3 is arranged at the opening and used for sealing the opening; the skin structure 1, the support structure 2 and the door body 3 are all composite material structures.

In the invention, the battery box body made of metal materials is replaced by the composite material structure, the weight of the structure is effectively reduced, in the using process, the whole structure obtains a stable accommodating space through the arrangement of the supporting structure 2, and the arrangement of the skin structure 1 and the door body 3 enables the whole space to be effectively sealed, so that an independent space for stable work of the storage battery is formed.

On the premise of ensuring the structural strength of the battery box body, the supporting structures 2 can be connected in a fitting manner, so that the inside of the skin structure 11 can be effectively supported in a full range, or the supporting structures 2 can be arranged at intervals, so that the inside of the skin structure 11 can be partially supported, the two structural forms are both within the protection range of the invention, but in the practical application process, the supporting structures 2 in the two structural forms can have differences in terms of weight.

As a preference of the above embodiment, as shown in fig. 3, in the present preferred embodiment, a specific structural form of the support structure 2 is provided, and the support structure 2 includes a first portion 21 and a second portion 22 which are both ring-shaped structures and are butted along a first direction in which the support structures 2 are juxtaposed, wherein at least one portion has an open end 23 in the first direction, and the open end 23 is sealed by the other portion to form a ring-shaped cavity 24. As a specific embodiment, first portion 21 and second portion 22 are both U-shaped in cross section, and the open end 23 of first portion 21 can be closed by inserting second portion 22 into the U-shaped structure of first portion 21 along a first direction, wherein the outer side wall of second portion 22 can be attached to the inner side wall of first portion 21, that is, second portion 22 is embedded in first portion 21, as shown in fig. 4; it is also within the scope of the present invention that one side wall of the second portion 22 is located inside the first portion 21, and the other side wall is located outside the first portion 21, and the side walls are attached to form a sealed annular cavity 24.

In the above embodiment, the stability of the structure is better by the form of sidewall fitting, wherein after the first portion 21 and the second portion 22 are butted, the overlapped sidewall portions are formed in the part of the annular cavity 24, and preferably, the overlapped sidewall portions are also annularly arranged, so that the stress of the whole supporting structure 2 has relative balance. For the purpose of structural simplification, however, the first portion 21 and the second portion 22 may alternatively be sealed at the open end 23 of the other by directly using a plate structure, as shown in fig. 6.

As a preference of the above embodiment, the first portion 21 and/or the second portion 22 is provided with a limiting structure 25 for limiting a limit position of the abutting action, as shown in fig. 7, a specific structural form of the limiting structure 25 is shown, the limiting structure 25 is a structure that is partially protruded at the periphery of the second portion 22, such a structural form can be integrally formed in the process of forming the second portion 22, the first portion 21 can be blocked after forming, the limiting structure 25 can limit the abutting action, and control the size of the partially overlapped portion of the side wall of the annular cavity 24, and in addition, the structure can also serve the purpose of increasing the strength.

In practical applications, the support structure 2 may have a relatively weak portion, or the support structure 2 may be used to realize other connection relationships besides supporting the skin structure 1, such as fixing the relevant mounting structure of the battery, so that in the preferred embodiment, the annular cavity 24 is at least partially provided with the filling body 26. As shown in fig. 8 and 9, the filling body 26 serves as a support part of the annular cavity 24, and may be of a composite material structure, a metal structure, or a structure through which a connecting member passes.

In the process of using the whole battery box body, the whole battery box body needs to be fixed in an equipment cabin of a subway train, so a corresponding connecting structure needs to be arranged outside the skin structure 1, and the connecting structure is obtained by an additional connecting piece aiming at the battery box body with a metal structure at present, however, in the invention, as shown in fig. 10, a connecting part 27 for installing the battery box body is formed by locally penetrating the skin structure 1 through a supporting structure 2, the structural form is related to the forming mode of the whole skin structure 1, the purpose of simplifying the structure is achieved, and of course, in order to improve the reliability of connection and fixation, a corresponding filling body 26 can be arranged in the connecting part 27. Of course, in the implementation process, the form of the external connection portion 27 shown in fig. 11 is also within the protection scope of the present invention, wherein the external connection portion 27 may be a metal structure or a composite material structure, and the specific connection manner with the skin structure 1 may also adopt a connection member or an adhesion manner, which is within the protection scope of the present invention.

As a preference of the above embodiment, as shown in fig. 12, the support structure 1 is formed with two parallel planar inner walls 12 at least at both sides of the width direction of the battery case inside the loop for installing the rail structure, and through the arrangement of the rail structure, the purpose is to realize the drawing of the support structure of the storage battery, thereby facilitating the installation and replacement of the storage battery, etc., wherein the arrangement of the planar inner walls 12 makes the installation of the rail structure more stable.

Wherein, the plane inner wall 12 is provided with a through hole 12a, and the through hole 12a is used for inserting a connecting piece connected with the guide rail structure; as shown in fig. 13 and 14, the supporting structure 2 is provided with an operation hole 12b communicating the inside and the outside of the annular cavity 24 at a position corresponding to the through hole 12a for providing an operation position for fixing the connecting member, the installation manner of the guide rail structure enables the outer surface of the whole battery box body to have no protruding structure, so that better appearance quality is obtained, and the size of the operation hole 12b needs to be proper, so that the structural strength is ensured. In the present preferred embodiment, the through-hole 12a and the operation hole 12b are both obtained by performing post-processing after molding.

On the premise of reducing the requirement on aesthetic property, in order to reduce the installation difficulty, the following rail structure installation mode can be adopted to replace the above mode, specifically, a local connection part of the skin structure 1 and the support structure 2 is provided with an installation hole 12c communicating the inside and the outside of the cavity structure 11, and the installation hole 12c is used for a connecting piece connected with the rail structure to penetrate through, so that the connecting piece can be fixed outside the battery box body through a nut and other structures.

As a preference of the above embodiment, the support structure 2 may also be a thin-walled ring structure relative to the support structure 1 having the internal annular cavity 24, so as to reduce the difficulty of processing, but in the implementation process, because the thin-walled structure is weaker than the structural strength having the cavity, in order to solve the above problem, as shown in fig. 16, a groove structure 28 is arranged on the outer side of the ring structure, so as to form a relative protruding structure on the inner side of the ring structure, so that the entire thin-walled structure is effectively strengthened.

In order to make the strength enhancing effect more excellent, the channel structure 28 penetrates through the thin-wall covering structure along the first direction in which the support structures 2 are arranged, as shown in fig. 17 and 18, the channel structure 28 correspondingly arranged on each support structure 2 is filled with the reinforcing ribs 4 attached to the inner wall of the skin structure 1. By the arrangement of the reinforcing ribs 4, an effective connection of the individual support structures 2 is obtained, and by the filling of the channel structure 28, a structural reinforcement is obtained. In the preferred embodiment, the reinforcing rib 4 is also preferably made of a composite material, and specifically, the reinforcing rib is of a solid structure, a hollow structure or a thin-wall structure, which is within the protection scope of the present invention.

As another structure reinforcing method, as shown in fig. 16, the supporting structures 2 are thin-walled ring structures, the protruding edges 29 are arranged inside the structure, and the protruding edges 29 are located at the first direction end portions of the ring structures parallel to the supporting structures 2, so that the structure reinforcing function is achieved, and the supporting structures 2 can be effectively connected through the connecting members when the supporting structures 2 are attached and connected.

It is of course also possible to provide the channel structure 28 and the lip 29 simultaneously for a double purpose.

When the guide rail structure is installed, the convex edge 29 is provided with an installation hole position for directly or indirectly installing the guide rail structure, two modes are selected according to the self structure of the guide rail structure, as shown in fig. 19 and 20, an indirect installation mode is shown, and the L-shaped plate 5 connected with the convex edge 29 is connected with the guide rail structure, wherein the L-shaped plate 5 can be a metal structure or a composite material structure, and the specific connection can also be realized through a connecting piece.

In the implementation process, the door body 3 simplifies the structure as much as possible, and when being installed, the door body can be connected with the skin structure 1 or the support structure 2, and preferably, a sealing structure 6 is arranged at the joint of the door body and the skin structure 1, wherein the sealing structure 6 can be a sealing strip which is wrapped on the edge of the skin structure 1 and has a U-shaped section.

and (3) forming the supporting frame 2: laying up the prepreg on a mould to enable the prepreg to obtain a profile shape corresponding to the mould, placing the prepreg and the mould in a vacuum bag, performing vacuumizing operation in the vacuum bag to form an integral structure, and placing the integral structure in a hot-pressing tank for molding;

and (3) forming the skin structure 1: fixing the support frames through the mold, forming surfaces for prepreg laying outside the mold and each support frame, performing prepreg laying operation on the surfaces, placing the prepreg, the support frames and the mold in a vacuum bag and performing vacuumizing operation to form an integral structure, and placing the integral structure in a hot-pressing tank for molding.

Through the manufacturing method in this embodiment, the battery box structure in the above embodiment can be formed, wherein the vacuum bag includes an internal filling bag body and an external wrapping bag body, the internal filling bag body needs to be arranged in the annular cavity 24 inside the support frame 2, and the internal shape is obtained through filling of the bag body, after the external wrapping bag body and the internal filling bag body are vacuumized, the required shape is obtained through a mode of being attached to a mold and a prepreg, wrapping of the vacuum bag is removed after heating forming, and the required battery box structure can be obtained by removing the mold. The number of the layers of the prepreg in the skin structure 1 can be selected according to actual needs, and in addition, when the support structures 2 are attached and connected, a local prepreg layer can be arranged to reinforce the gap between the two support structures 2. The supporting structure 2 which is formed at first obtains a stable shape, can be directly attached to the prepreg which is laid subsequently, and can also be positioned better in a bonding mode, so that the position in the subsequent heating process is stable and reliable.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A composite battery case, comprising:

the door body is arranged at the opening and used for sealing the opening;

2. The composite battery case of claim 1, wherein the support structure comprises a first portion and a second portion each of a ring-like configuration, the portions abutting along a first direction in which the support structures are juxtaposed, wherein at least one portion has an open end in the first direction, and the open end is sealed by the other portion to form a ring-like cavity.

3. The composite battery box body as claimed in claim 2, wherein the first part and/or the second part is/are provided with a limiting structure for limiting the limit position of the butt joint action.

4. The composite battery case of claim 2, wherein a filler is at least partially disposed within the annular cavity.

5. The composite battery case of claim 1 wherein the support structure extends partially through the skin structure to form a connection for mounting the battery case.

6. The composite battery case according to claim 1 or 2, wherein the support structure has two parallel planar inner walls formed on the inner side of the ring at least on both sides in the width direction of the battery case for mounting a rail structure.

7. The composite material battery box body as claimed in claim 1, wherein the support structure is a thin-walled ring structure, and a groove structure is arranged outside the ring structure.

8. The composite battery box body as claimed in claim 7, wherein the groove structures penetrate and cover the thin-wall structures along a first direction in which the support structures are juxtaposed, and the groove structures correspondingly arranged on the support structures are filled with integrated reinforcing ribs attached to the inner wall of the skin structure.

9. The composite battery box of claim 1, wherein the support structure is a thin-walled ring structure having a ledge disposed therein at a first end of the ring structure in a direction parallel to the support structures.

10. A manufacturing method of a composite material battery box body is characterized by comprising the following steps: