Battery pack lower box body for new energy automobile

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack lower box for a new energy automobile, which comprises a light frame main body and a light support frame body arranged in the light frame main body and connected to the inner side wall of the light frame main body, and the light frame main body is a glass fiber frame main body or a carbon fiber frame main body. The light supporting frame body is a glass fiber supporting frame body or a carbon fiber supporting frame body. The light frame body and the light supporting frame body arranged in the light frame body enable the lower box body to form a partially-hollowed-out structure, the overall weight of the lower box body is effectively reduced, in addition, the light frame body is a glass fiber frame body or a carbon fiber frame body, and the light supporting frame body is a glass fiber supporting frame body or a carbon fiber supporting frame body. And compared with the existing metal lower box body, the light weight degree is high, so that the light weight degree of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery packs, in particular to a battery pack lower box for a new energy vehicle. BACKGROUND

[0002] As the core of an electric vehicle, the safety of a battery pack has a great influence on the normal operation of the electric vehicle. The battery pack usually comprises a battery module and a lower box. The lower box in the prior art is usually made of steel or aluminum alloy, which increases the weight of the lower box and is not conducive to the lightweight of the battery pack. Therefore, further improvement is needed. CONTENT OF THE UTILITY MODEL

[0003] In order to realize the lightweight of the lower box, the application provides a battery pack lower box for a new energy vehicle.

[0004] The application provides a battery pack lower box for a new energy vehicle, which adopts the following technical scheme:

[0005] The battery pack lower box for the new energy vehicle comprises a lightweight frame body and a lightweight support frame body which is built in the lightweight frame body and connected to the inner side wall of the lightweight frame body. The lightweight frame body is a fiberglass frame body or a carbon fiber frame body. The lightweight support frame body is a fiberglass support frame body or a carbon fiber support frame body.

[0006] By adopting the above technical scheme, the lightweight frame body and the lightweight support frame body built in the lightweight frame body form a partially hollow structure, effectively reducing the overall weight of the lower box. In addition, the lightweight frame body is a fiberglass frame body or a carbon fiber frame body, and the lightweight support frame body is a fiberglass support frame body or a carbon fiber support frame body. Compared with the existing metal lower box, the degree of lightweight is high, thereby improving the degree of lightweight of the battery pack.

[0007] Preferably, the lightweight support frame body comprises a plurality of lightweight longitudinal beams which are spaced apart and a plurality of lightweight cross beams which are detachably connected to the side walls of the lightweight longitudinal beams. The end faces of the lightweight longitudinal beams are detachably connected to the inner side wall of the lightweight frame body. The end faces of the lightweight cross beams are detachably connected to the inner side wall of the lightweight frame body.

[0008] By adopting the above technical scheme, when the lower box is installed, the lightweight longitudinal beams and the lightweight cross beams can be assembled first, then the lightweight support frame body is placed in the lightweight frame body, and finally the end portions of the lightweight cross beams / the end portions of the lightweight longitudinal beams are installed on the inner side wall of the lightweight frame body.

[0009] Preferably, the end face of the lightweight longitudinal beam is provided with a longitudinal weight-reducing groove which penetrates along the length direction of the lightweight longitudinal beam.

[0010] By adopting the above technical scheme, the weight of the lightweight longitudinal beam is reduced, thereby effectively reducing the overall weight of the lower box.

[0011] Preferably, the two ends of the lightweight longitudinal beam are provided with longitudinal connector pieces detachably connected to the inner side walls of the lightweight frame body, the longitudinal connector piece is a metal piece, the longitudinal connector piece comprises a first mounting plate and a first plug-in column fixedly connected to the first mounting plate, the first plug-in column is inserted into the longitudinal light reduction groove, the lightweight longitudinal beam is provided with a first fixing piece for fixing the first plug-in column, and the first mounting plate is detachably connected to the inner side walls of the lightweight frame body.

[0012] By adopting the above technical scheme, the end of the lightweight longitudinal beam is provided with a longitudinal connector piece, the longitudinal connector piece is a metal piece, the connection strength between the lightweight longitudinal beam and the lightweight frame body is improved, and the connection stability of the lightweight support frame body is improved.

[0013] Preferably, the end side wall of the lightweight longitudinal beam is provided with a first mounting hole communicated with the longitudinal light reduction groove, the first plug-in column is provided with a first limiting hole, the first fixing piece is a first fixing bolt threaded through the first mounting hole and the first limiting hole, and the threaded section of the first fixing bolt is threadedly connected with a first fixing nut.

[0014] By adopting the above technical scheme, after the first plug-in column is inserted into the longitudinal light reduction groove, the first limiting hole and the first mounting hole are corresponded, the first fixing bolt is threaded through the first mounting hole and the first limiting hole, and then the first fixing nut is locked, so that the first plug-in column and the lightweight longitudinal beam are fixed.

[0015] Preferably, the end face of the lightweight transverse beam is provided with a transverse light reduction groove along the length direction of the lightweight transverse beam.

[0016] By adopting the above technical scheme, the weight of the lightweight transverse beam is reduced, and the overall weight of the lower box body is effectively reduced.

[0017] Preferably, the two ends of the lightweight transverse beam are provided with transverse connector pieces for connecting the inner side walls of the lightweight frame body / the side walls of the lightweight longitudinal beam, the transverse connector piece is a metal piece, the transverse connector piece comprises a second mounting plate and a second plug-in column fixedly connected to the second mounting plate, the second plug-in column is inserted into the transverse light reduction groove, the lightweight transverse beam is provided with a second fixing piece for fixing the second plug-in column, and the second mounting plate is detachably connected to the inner side walls of the lightweight frame body / the side walls of the lightweight longitudinal beam.

[0018] By adopting the above technical scheme, the end of the lightweight transverse beam is provided with a transverse connector piece, the transverse connector piece is a metal piece, the connection strength between the lightweight transverse beam and the lightweight frame body / the lightweight longitudinal beam is improved, and the connection stability of the lightweight support frame body is improved.

[0019] Preferably, the end side wall of the light cross beam is provided with a second mounting hole communicated with the cross weight reduction groove, the second plug-in column is provided with a second limiting hole, and the second fixing member is a second fixing bolt penetrating through the second mounting hole and the second limiting hole, and a second fixing nut is threadedly connected with a threaded section of the second fixing bolt.

[0020] By adopting the above technical scheme, after the second plug-in column is inserted into the cross weight reduction groove, the second limiting hole and the second mounting hole are corresponded, the second fixing bolt is penetrated through the second mounting hole and the second limiting hole, and then the second fixing nut is locked, so that the second plug-in column and the light cross beam are fixed.

[0021] Preferably, the lower surface of the light frame body is provided with a liquid cooling plate.

[0022] By adopting the above technical scheme, the liquid cooling plate is additionally arranged, on one hand, the lower surface of the light frame body is sealed to place the battery module, and on the other hand, the heat generated by the battery module during work is absorbed by the liquid cooling plate to cool the battery module.

[0023] In summary, the utility model has the following beneficial effects:

[0024] 1. The light frame body and the light support frame body built-in the light frame body make the lower cabinet form a partial hollow structure, effectively reducing the overall weight of the lower cabinet, in addition, the light frame body is a glass fiber frame body or a carbon fiber frame body, and the light support frame body is a glass fiber support frame body or a carbon fiber support frame body, compared with the existing metal lower cabinet, the lightness degree is high, thereby improving the lightness degree of the battery pack.

[0025] 2. The end of the light longitudinal beam is provided with a longitudinal connector, and the longitudinal connector is a metal piece, thereby improving the connection strength between the light longitudinal beam and the light frame body, and improving the connection stability of the light support frame body.

[0026] 3. The end of the light cross beam is provided with a transverse connector, and the transverse connector is a metal piece, thereby improving the connection strength between the light cross beam and the light frame body / light longitudinal beam, and improving the connection stability of the light support frame body. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a kind of battery pack lower cabinet's overall structure schematic view for new energy automobile;

[0028] Figure 2 It is the structure schematic view for showing lower protective cover plate;

[0029] Figure 3 It is the structure explosion schematic view of battery pack lower cabinet;

[0030] Figure 4is a schematic view of the connection structure of the frame corner code and the horizontal frame strip and the vertical frame strip;

[0031] Figure 5 is a schematic view of the structure of the light support frame body;

[0032] Figure 6 is a schematic view of the connection structure of the vertical joint member and the light vertical beam;

[0033] Figure 7 is a schematic view of the connection structure of the horizontal joint member and the light horizontal beam;

[0034] Figure 8 is Figure 3 is a local enlarged schematic view at A.

[0035] In the figure, 1, light frame body; 11, horizontal frame strip; 12, vertical frame strip; 13, frame corner code; 131, horizontal insertion column; 132, vertical insertion column; 14, sealing washer; 141, positioning hole; 15, pull rivet nut column; 16, frame weight reduction groove; 2, light support frame body; 21, light vertical beam; 211, vertical weight reduction groove; 212, first mounting hole; 22, light horizontal beam; 221, horizontal weight reduction groove; 222, second mounting hole; 23, first fixing bolt; 231, first fixing nut; 24, second fixing bolt; 241, second fixing nut; 3, upper protective cover plate; 31, fireproof plate; 4, lower protective cover plate; 41, liquid cooling plate; 5, vertical joint member; 51, first mounting plate; 52, first insertion column; 521, first limiting hole; 6, horizontal joint member; 61, second mounting plate; 62, second insertion column; 621, second limiting hole. DETAILED DESCRIPTION

[0036] The following will be described in detail with reference to the accompanying drawings. Figures 1-8 The application is further described in detail.

[0037] The embodiment of the application discloses a battery pack lower box for a new energy automobile, referring to Figure 1 , Figure 2 , comprising a light frame body 1, a light support frame body 2 which is built-in the light frame body 1 and connected to the inner side wall of the light frame body 1, an upper protective cover plate 3 which is installed on the upper surface of the light frame body 1 and a lower protective cover plate 4 which is installed on the lower surface of the light frame body 1.

[0038] Referring to Figure 3 , Figure 4The lightweight frame body 1 can be a fiberglass frame body or a carbon fiber frame body. In the present embodiment, the lightweight frame body 1 is a fiberglass frame body. The fiberglass frame body is made of glass fiber and is cured by impregnation with resin. Furthermore, the fiberglass frame body is made of Z-TEX series fiberglass materials. Specifically, the lightweight frame body 1 includes a pair of horizontal frame bars 11 and a pair of vertical frame bars 12. The two ends of the vertical frame bars 12 are respectively installed at the ends of the two horizontal frame bars 11. The end faces of the horizontal frame bars 11 and the vertical frame bars 12 are provided with frame weight-reducing grooves 16, so that the horizontal frame bars 11 and the vertical frame bars 12 are hollow structures, thereby reducing the weight of the horizontal frame bars 11 and the vertical frame bars 12. A frame corner code 13 is provided between the connection between the horizontal frame bars 11 and the vertical frame bars 12. The frame corner code 13 is a metal part.

[0039] The frame bracket 13 comprises a horizontal connecting post 131 and a vertical connecting post 132 fixedly connected to the sidewall of one end of the horizontal connecting post 131, giving the frame bracket 13 an L-shape. The end of the horizontal connecting post 131 is inserted into the frame reduction groove 16 of the horizontal frame bar 11, and the horizontal frame bar 11 and the horizontal connecting post 131 are locked together by bolts. The end of the vertical connecting post 132 is inserted into the frame reduction groove 16 of the vertical frame bar 12, and the vertical frame bar 12 and the vertical connecting post 132 are locked together by bolts. Structural adhesive is applied to the joints between the horizontal frame bar 11 and the vertical frame bar 12.

[0040] Reference Figure 3 、 Figure 5 The lightweight support frame 2 can be a glass fiber support frame or a carbon fiber support frame. In this embodiment, the lightweight support frame 2 is a glass fiber support frame. The glass fiber support frame is made of glass fiber and is impregnated with resin and cured. Furthermore, the glass fiber support frame is made of Z-TEX series glass fiber material. The lightweight support frame 2 includes a plurality of spaced-apart lightweight longitudinal beams 21 and a plurality of lightweight cross beams 22 detachably connected to the side walls of the lightweight longitudinal beams 21. The end surfaces of the lightweight longitudinal beams 21 are detachably connected to the inner side walls of the lightweight frame body 1, and the end surfaces of the lightweight cross beams 22 are detachably connected to the inner side walls of the lightweight frame body 1.

[0041] Reference Figure 6 The end surface of the lightweight longitudinal beam 21 is provided with a longitudinal mass-reducing groove 211 extending along its length, giving the lightweight longitudinal beam 21 a hollow structure and reducing its weight. In this embodiment, two longitudinal mass-reducing grooves 211 are provided, distributed vertically. Both ends of the lightweight longitudinal beam 21 are provided with longitudinal connectors 5 that are detachably connected to the inner sidewall of the lightweight frame body 1. Specifically, the longitudinal connectors 5 are metal components and include a first mounting plate 51 and a first plug-in column 52 fixedly connected to the middle portion of one side of the first mounting plate 51, giving the longitudinal connector 5 a T-shape. The first mounting plate 51 is fixedly connected to the inner sidewall of the horizontal frame bar 11 by bolts.

[0042] The first plug-in column 52 is inserted into the longitudinal light reduction groove 211, and the light longitudinal beam 21 is provided with a first fixing member for fixing the first plug-in column 52. The end side wall of the light longitudinal beam 21 is provided with a first mounting hole 212 communicated with the longitudinal light reduction groove 211, and the first plug-in column 52 is provided with a first limiting hole 521. The first fixing member is a first fixing bolt 23 penetrating through the first mounting hole 212 and the first limiting hole 521, and the threaded segment of the first fixing bolt 23 is threadedly connected with a first fixing nut 231.

[0043] Referring to Figure 7 , the end surface of the light transverse beam 22 is provided with a transverse light reduction groove 221 along the length direction of the light transverse beam 22, so that the light transverse beam 22 is hollowly arranged to reduce the weight of the light transverse beam 22. In the embodiment, the transverse light reduction groove 221 is provided with two grooves and is distributed in an upper and lower manner. The two ends of the light transverse beam 22 are provided with a transverse joint member 6 for connecting the inner side wall of the longitudinal frame strip 12 / the side wall of the light longitudinal beam 21. The transverse joint member 6 is a metal member, and the transverse joint member 6 includes a second mounting plate 61 and a second plug-in column 62 fixedly connected to the middle of one side of the second mounting plate 61, so that the transverse joint member 6 is in a T shape. The first mounting plate 51 is fixedly connected to the inner side wall of the longitudinal frame strip 12 / the side wall of the light longitudinal beam 21 by a bolt.

[0044] The second plug-in column 62 is inserted into the transverse light reduction groove 221, and the light transverse beam 22 is provided with a second fixing member for fixing the second plug-in column 62. The end side wall of the light transverse beam 22 is provided with a second mounting hole 222 communicated with the transverse light reduction groove 221, and the second plug-in column 62 is provided with a second limiting hole 621. The second fixing member is a second fixing bolt 24 penetrating through the second mounting hole 222 and the second limiting hole 621, and the threaded segment of the second fixing bolt 24 is threadedly connected with a second fixing nut 241. The connection between the light support frame body 2 and the light bezel main body 1 is coated with structural glue.

[0045] Referring to Figure 3 , Figure 8 , the upper surfaces of the transverse frame strip 11 and the longitudinal frame strip 12 are fixedly connected with a sealing gasket 14. In the embodiment, the sealing gasket 14 is a silica foam sealing gasket. The upper surfaces of the transverse frame strip 11 and the longitudinal frame strip 12 are protrusively provided with a pull rivet nut column 15. The sealing gasket 14 is provided with a positioning hole 141 for inserting the pull rivet nut column 15. The upper protective cover plate 3 is a glass fiber plate. The edges of the upper protective cover plate 3 are locked with the pull rivet nut column 15 by a bolt. The lower surface of the upper protective cover plate 3 abuts against the upper surface of the sealing gasket 14. The lower surface of the upper protective cover plate 3 is fixedly connected with a fireproof plate 31 by a bolt. The fireproof plate 31 is used for covering the battery module. Specifically, the fireproof plate 31 is a glass fiber fireproof plate, which improves the fireproof performance of the lower box body.

[0046] Referring to Figure 3The lower surface of the horizontal frame strip 11 and the vertical frame strip 12 is bolted with the liquid cooling plate 41 to seal the lower surface of the light frame body 1 and the light support frame body 2, form a bottom support for placing the battery module, and the heat generated by the battery module during operation is transmitted and absorbed by the liquid cooling plate 41, thereby cooling the battery module. The lower protective cover plate 4 is a glass fiber plate, and the lower protective cover plate 4 is bolted to the lower surface of the liquid cooling plate 41.

[0047] The implementation principle of the battery pack lower box of the embodiment of the application is that the light frame body 1 and the light support frame body 2 built in the light frame body 1 form a hollow structure, effectively reducing the overall weight of the lower box, in addition, the light frame body 1 is a glass fiber frame body, and the light support frame body 2 is a glass fiber support frame body, compared with the existing metal lower box, the degree of light weight is high, thereby improving the degree of light weight of the battery pack.

[0048] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A battery pack lower box for a new energy vehicle, characterized in that: The light frame body (1) is a fiberglass frame body or a carbon fiber frame body, and the light support frame body (2) is a fiberglass support frame body or a carbon fiber support frame body.

2. The battery pack lower box for a new energy vehicle according to claim 1, characterized in that: The light support frame body (2) comprises a plurality of light longitudinal beams (21) distributed at intervals and a plurality of light cross beams (22) detachably connected to the side walls of the light longitudinal beams (21), the end faces of the light longitudinal beams (21) are detachably connected to the inner side walls of the light frame body (1), and the end faces of the light cross beams (22) are detachably connected to the inner side walls of the light frame body (1).

3. The battery pack lower box for a new energy vehicle according to claim 2, characterized in that: The end face of the light longitudinal beam (21) is provided with a longitudinal light reduction groove (211) penetrating along the length direction of the light longitudinal beam (21).

4. The battery pack lower box for a new energy vehicle according to claim 3, characterized in that: The two ends of the light longitudinal beam (21) are provided with longitudinal connector pieces (5) detachably connected to the inner side walls of the light frame body (1), the longitudinal connector pieces (5) are metal pieces, the longitudinal connector pieces (5) comprise first mounting plates (51) and first plug-in columns (52) fixedly connected to the first mounting plates (51), the first plug-in columns (52) are inserted into the longitudinal light reduction grooves (211), the light longitudinal beam (21) is provided with first fixing pieces for fixing the first plug-in columns (52), and the first mounting plates (51) are detachably connected to the inner side walls of the light frame body (1).

5. The battery pack lower box for a new energy vehicle according to claim 4, characterized in that: The end side wall of the light longitudinal beam (21) is provided with a first mounting hole (212) communicating with the longitudinal light reduction groove (211), the first plug-in column (52) is provided with a first limiting hole (521), the first fixing piece is a first fixing bolt (23) penetrating the first mounting hole (212) and the first limiting hole (521), and the threaded section of the first fixing bolt (23) is threadedly connected with a first fixing nut (231).

6. The battery pack lower box for a new energy vehicle according to claim 2, characterized in that: The end face of the light cross beam (22) is provided with a transverse light reduction groove (221) penetrating along the length direction of the light cross beam (22).

7. The battery pack lower box for a new energy vehicle according to claim 4, characterized in that: The two ends of the light cross beam (22) are provided with transverse connector pieces (6) for connecting the inner side walls of the light frame body (1) and / or the side walls of the light longitudinal beams (21), the transverse connector pieces (6) are metal pieces, the transverse connector pieces (6) comprise second mounting plates (61) and second plug-in columns (62) fixedly connected to the second mounting plates (61), the second plug-in columns (62) are inserted into the transverse light reduction grooves (221), the light cross beam (22) is provided with second fixing pieces for fixing the second plug-in columns (62), and the second mounting plates (61) are detachably connected to the inner side walls of the light frame body (1) and / or the side walls of the light longitudinal beams (21). 8.The battery pack lower box for a new energy vehicle of claim 5, characterized in that: The end side wall of the light cross beam (22) is provided with a second mounting hole (222) communicating with the transverse light reduction groove (221), the second plug-in column (62) is provided with a second limiting hole (621), the second fixing piece is a second fixing bolt (24) penetrating the second mounting hole (222) and the second limiting hole (621), and the threaded section of the second fixing bolt (24) is threadedly connected with a second fixing nut (241). 9.The battery pack lower box for a new energy vehicle of claim 1, wherein: The lower surface of the light frame body (1) is provided with a liquid cooling plate (41).

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