CN220963575U - Lower box of battery pack - Google Patents
Lower box of battery pack Download PDFInfo
- Publication number
- CN220963575U CN220963575U CN202322362755.3U CN202322362755U CN220963575U CN 220963575 U CN220963575 U CN 220963575U CN 202322362755 U CN202322362755 U CN 202322362755U CN 220963575 U CN220963575 U CN 220963575U
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- CN
- China
- Prior art keywords
- main body
- frame
- battery pack
- inner tray
- lower case
- Prior art date
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- 239000002131 composite material Substances 0.000 claims abstract description 25
- 239000003365 glass fiber Substances 0.000 claims abstract description 16
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 16
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 16
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 44
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- -1 steel and aluminum Chemical class 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to the technical field of automobile parts, and discloses a battery pack lower box body, which comprises: the inner tray and the main body are integrally arranged, and are sequentially arranged from top to bottom; wherein: a placement area for arranging a battery core or a battery module is arranged on one side of the inner tray far away from the main body, and a first connecting structure for connecting a battery upper cover is arranged on the inner tray; the main body is provided with a second connecting structure which can be connected with the chassis of the automobile; the main body is made of a continuous fiber reinforced thermoplastic composite material, and the inner tray is made of a glass fiber felt reinforced thermoplastic composite material. The lower box body of the battery pack has the advantages of high strength, light weight and easiness in manufacturing.
Description
Technical Field
The utility model relates to the technical field of automobile accessories, in particular to a battery pack lower box body.
Background
The electric car has wider market share because of the advantages of energy conservation, environmental protection and the like. The battery pack is one of the core modules of the electric car, and the battery pack lower case is an important component of the battery pack, and it is required to facilitate assembly with components such as the battery upper cover, in addition to having sufficient mechanical strength.
The existing battery pack lower box body mainly comprises the following components:
The battery pack lower box body formed by welding high-strength steel or aluminum alloy has high process maturity and large market dosage. However, the welding process tends to deform the product, and the welding area has a problem of low strength and insufficient sealing property.
The battery pack lower box body formed by injection molding aims to reduce the weight of products. But the mechanical properties are low, complex ribs are required to be added in the connecting area to ensure the mounting strength, and the problems of injection molding defects, stress concentration and the like are easy to occur in the molding process.
Scheme of bonding with metal/continuous fiber composite by injection molding. The frame is required to be processed firstly, then the injection molding box body is processed, and the manufacturing is complex; and the frame is single in shape, so that the structural layout of the product is limited.
Disclosure of utility model
Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: a battery pack lower case is provided which has high strength, light weight, and easy manufacturing.
The utility model provides a battery pack lower box body, which solves the technical problems and comprises:
the inner tray and the main body are integrally arranged, and the inner tray and the main body are sequentially arranged from top to bottom; wherein:
A placement area for arranging a battery core or a battery module is arranged on one side of the inner tray away from the main body, and a first connecting structure for connecting a battery upper cover is arranged on the inner tray; the main body is provided with a second connecting structure which can be connected with the automobile chassis;
the main body is made of a continuous fiber reinforced thermoplastic composite material, and the inner tray is made of a glass fiber felt reinforced thermoplastic composite material.
Further, an outer reinforcing layer is arranged on one side, far away from the inner tray, of the main body, and the inner tray, the main body and the outer reinforcing layer are integrally arranged.
Further, the material of the outer reinforcing layer is glass fiber felt reinforced thermoplastic composite material.
Further, the inner tray, the main body and the outer additive layer are integrally formed by compression molding.
Further, the outer reinforcement layer comprises a first frame body and a plurality of lugs extending outwards along the edge of the first frame body, and a plurality of reinforcing ribs are arranged between the lugs and the first frame body.
Further, a plurality of reinforcing bosses are arranged on one side, far away from the main body, of the outer reinforcing layer, and metal inserts are embedded on the reinforcing bosses;
The material of the reinforcing boss is glass fiber mat reinforced thermoplastic composite material, and the metal insert, the reinforcing boss and the outer reinforcing layer are integrally arranged.
Further, the reinforcing boss comprises a cylinder and a plurality of rib plates arranged along the circumference of the cylinder, and the metal insert is embedded on the cylinder.
Further, the main body comprises a second frame body, and the second connecting structure is a through hole formed in the outer convex edge of the second frame body;
The inner tray comprises a third frame body, the third frame body is positioned in the second frame body, and the first connecting structure is a through hole formed in the outer protruding edge of the third frame body.
Further, a plurality of keels are formed on the bottom plates of the second frame body and the third frame body in an upward convex mode, and the keels on the second frame body and the third frame body are arranged in a one-to-one correspondence mode.
Compared with the prior art, the utility model has at least the following beneficial effects:
in the utility model, the inner tray and the main body are integrally arranged, the main body is made of a continuous fiber reinforced thermoplastic composite material (CFRTP), and is used as a structural main body, so that the inner tray has enough mechanical strength, has stronger weight than metals such as steel, aluminum and the like, has low heat conductivity coefficient and better heat insulation than metals, and is beneficial to heat management of a battery pack; the inner tray is made of glass fiber mat reinforced thermoplastic composite material (namely GMT), has good material fluidity and strong plasticity, and is convenient for forming a reinforcing rib structure to increase local strength and rigidity. And an outer reinforcing layer can be arranged on the outer side of the main body, and the outer reinforcing layer is made of glass fiber felt reinforced thermoplastic composite material. The two materials are mixed, so that inserts can be conveniently added on the inner side and the outer side of the lower box body of the battery pack, subsequent assembly is convenient, and the battery pack can be integrally molded and is convenient to manufacture.
Drawings
FIG. 1 is a schematic view of the structure of a lower case of a battery pack according to the present utility model;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of the structure of FIG. 1 from another perspective;
fig. 4 is a schematic structural view of the reinforcing protrusion and the metal insert.
In the figure:
1. An inner tray; 10. a third frame; 101. a placement area; 102. a first connection structure; 120. a keel;
2. a main body; 20. a second frame; 201. a second connection structure;
3. An outer reinforcing layer; 30. a first frame; 31. a lug; 310. reinforcing ribs; 32. reinforcing the boss; 321. a cylinder; 322. rib plates; 33. a metal insert.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
As shown in fig. 1-2, a battery pack lower case mainly includes: the inner tray 1, the main body 2 and the outer reinforcing layer 3, wherein the inner tray 1 and the main body 2 are necessary structures of the lower box body of the battery pack, and the outer reinforcing layer 3 is a preferable optimal structure of the lower box body of the battery pack.
The inner tray 1 and the main body 2 are integrally arranged and integrally formed. The inner tray 1 and the main body 2 are arranged in sequence from top to bottom, that is, the inner tray 1 is positioned at the inner side of the main body 2. Wherein: a placement area 101 for arranging battery cores or battery modules is arranged on one side, away from the main body 2, of the inner tray 1, the battery cores or the battery modules can be uniformly arranged on the placement area 101, and a first connecting structure 102 for connecting an upper cover of the battery is arranged on the inner tray 1; the main body 2 is provided with a second connection structure 201 which can be connected with the chassis of the automobile. Specifically, the main body 2 includes a second frame 20, the second connection structure 201 is a through hole formed on an outer flange of the second frame 20, the second frame 20 has a plurality of outer flanges extending outwards, a plurality of through holes are formed on the outer flange, and bolts can pass through the through holes to fixedly mount the main body 2 on the chassis of the automobile. The inner tray 1 comprises a third frame 10, the third frame 10 is positioned in the second frame 20, the first connecting structure 102 is a through hole formed on the outer convex edge of the third frame 10, and the inner tray 1 can be fixedly connected with the upper cover of the battery through the through hole of the third frame 10 by bolts.
And, a plurality of keels 120 are formed on the bottom plates of the second frame body 20 and the third frame body 10 in a convex shape, and the keels 120 on the second frame body 20 and the third frame body 10 are arranged in a one-to-one correspondence. The first frame 30 is also provided with a plurality of keels 120 corresponding to the keels 120 on the first frame 30 and the second frame 20 one by one, and the keels 120 can improve the structural strength of the lower box product of the battery pack, and if no keels 120 are arranged, the large plane is easy to deform, and the flatness is poor and the strength is poor.
In this embodiment, the main body 2 is made of a continuous fiber reinforced thermoplastic composite material (CFRTP), and the inner tray 1 is made of a glass fiber mat reinforced thermoplastic composite material (GMT).
It should be noted that CFRTP (Continuous Fiber-Reinforced Thermoplastic Composites): is a composite material with continuous fibers as a reinforcing material and thermoplastic resin as a matrix. The reinforcing fiber mainly comprises carbon fiber, glass fiber, aramid fiber and the like, and the resin matrix comprises PP, PA, PC, PEI, PPS, PEEK and the like. CFRTP, as a novel thermoplastic composite material with high strength, high rigidity, high toughness and recyclability, can have comparable strength, lighter weight and higher energy absorbing capacity than steel and aluminum alloys. GMT (Glass Mat reinforced Thermoplastics) is short for glass fiber felt reinforced thermoplastic composite material, which is composite material with thermoplastic resin as matrix and glass fiber felt as reinforced skeleton. The molding process adopts a hot material cold mold molding process. It is a novel engineering plastic.
In this embodiment, the inner tray 1 and the main body 2 are integrally arranged, and the main body 2 is made of a continuous fiber reinforced thermoplastic composite material (CFRTP), so that the main body 2 is a structural main body 2, which has enough mechanical strength, has a weight stronger than metals such as steel and aluminum, has a low heat conductivity coefficient, has better heat insulation than metals, and is beneficial to heat control of a battery pack; the inner tray 1 is made of glass fiber mat reinforced thermoplastic composite material (namely GMT), and has good material fluidity and strong plasticity, and the reinforcing rib 310 structure is conveniently formed to increase local strength and rigidity.
Preferably, the outer reinforcement layer 3 is disposed on the side of the main body 2 away from the inner tray 1, wherein the outer reinforcement layer 3 is made of glass fiber mat reinforced thermoplastic composite (i.e. GMT). The inner tray 1, the main body 2 and the outer reinforcing layer 3 are integrally arranged, specifically, the inner tray 1, the main body 2 and the outer reinforcing layer 3 are integrally formed by compression molding, and the lower box body of the battery pack is simple to form.
As shown in fig. 3 to 4, the outer reinforcing layer 3 includes a first frame 30 and a plurality of lugs 31 extending outwards along the edge of the first frame 30, and a plurality of reinforcing ribs 310 are disposed between the lugs 31 and the first frame 30, so that the outer reinforcing layer 3 is convenient to set various local reinforcing structures due to good flowability of GMT materials, and forming defects are not easy to generate. Wherein, as a further preference, the side of outer enhancement layer 3 keeping away from main part 2 is equipped with a plurality of boss 32 of strengthening, strengthens and inlays on the boss 32 and is equipped with metal insert 33, and this metal insert 33 is hollow cylinder, the convenient tapping to box and other structure assembly connection under the battery package of being convenient for. The reinforcing boss 32 is made of glass fiber mat reinforced thermoplastic composite material, and the metal insert 33 and the reinforcing boss 32 are integrally arranged with the outer reinforcing layer 3. The reinforcing boss 32 includes a cylinder 321 and a plurality of rib plates 322 circumferentially arranged along the cylinder 321, and the metal insert 33 is embedded on the cylinder 321.
In the embodiment, the upper layer and the lower layer of the lower box body of the battery pack are made of GMT materials, the middle bearing layer is made of CFRTP materials, the two materials are mixed and used, the battery pack can be integrally formed, an assembling and welding step does not exist, the air tightness is better, the comprehensive density of the battery pack is 1.5-2kg/m & lt 3 & gt, the battery pack is smaller than a steel and aluminum structure, and the weight of a product is lighter. The CFRTP is a plate formed by overlapping a plurality of groups of continuous unidirectional fibers, has anisotropy, can be used for angle adjustment and thickness adjustment according to different mechanical property requirements, and is convenient for adjusting the mechanical property according to the requirements. The GMT material has good fluidity and can be embedded with the metal insert 33.
In this scheme, this box under battery package intensity is high, light in weight (light high strength), and easily makes.
Claims (9)
1. A battery pack lower case, comprising:
the inner tray and the main body are integrally arranged, and the inner tray and the main body are sequentially arranged from top to bottom; wherein:
A placement area for arranging a battery core or a battery module is arranged on one side of the inner tray away from the main body, and a first connecting structure for connecting a battery upper cover is arranged on the inner tray; the main body is provided with a second connecting structure which can be connected with the automobile chassis;
the main body is made of a continuous fiber reinforced thermoplastic composite material, and the inner tray is made of a glass fiber felt reinforced thermoplastic composite material.
2. The battery pack lower case according to claim 1, wherein an outer reinforcing layer is provided on a side of the main body remote from the inner tray, and the inner tray, the main body and the outer reinforcing layer are integrally provided.
3. The battery pack lower case according to claim 2, wherein the material of the outer reinforcing layer is a glass fiber mat reinforced thermoplastic composite material.
4. The battery pack lower case according to claim 2 or 3, wherein the inner tray, the main body, and the outer reinforcing layer are integrally molded.
5. A battery pack lower case according to claim 2 or 3, wherein the outer reinforcing layer comprises a first frame and a plurality of lugs extending outwardly along the edges of the first frame, a plurality of reinforcing ribs being provided between the lugs and the first frame.
6. The battery pack lower case according to claim 2 or 3, wherein a plurality of reinforcing bosses are provided on a side of the outer reinforcing layer away from the main body, and metal inserts are embedded on the reinforcing bosses;
The material of the reinforcing boss is glass fiber mat reinforced thermoplastic composite material, and the metal insert, the reinforcing boss and the outer reinforcing layer are integrally arranged.
7. The battery pack lower case according to claim 6, wherein the reinforcing boss comprises a cylinder and a plurality of rib plates provided along a circumference of the cylinder, and the metal insert is embedded on the cylinder.
8. The battery pack lower case according to claim 1, wherein the main body includes a second frame body, and the second connection structure is a through hole formed on an outer protruding edge of the second frame body;
The inner tray comprises a third frame body, the third frame body is positioned in the second frame body, and the first connecting structure is a through hole formed in the outer protruding edge of the third frame body.
9. The battery pack lower case according to claim 8, wherein a plurality of keels are formed on the bottom plates of both the second frame and the third frame in an upward convex shape, and the keels on both the second frame and the third frame are arranged in a one-to-one correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362755.3U CN220963575U (en) | 2023-08-31 | 2023-08-31 | Lower box of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362755.3U CN220963575U (en) | 2023-08-31 | 2023-08-31 | Lower box of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220963575U true CN220963575U (en) | 2024-05-14 |
Family
ID=91010146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322362755.3U Active CN220963575U (en) | 2023-08-31 | 2023-08-31 | Lower box of battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220963575U (en) |
-
2023
- 2023-08-31 CN CN202322362755.3U patent/CN220963575U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |