Composite shell and battery with same
By hot-pressing the composite glass fiber cloth layer and resin layer on the metal plate, the problems of high production difficulty and high cost of composite shells are solved, and the processing difficulty and production cost are achieved are achieved, and the structural strength and lightweight characteristics are improved.
Patent Information
- Application Number
- CN202421430874.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-06-20
AI Technical Summary
In the prior art, the production of composite upper shells is difficult and the production cost is high.
A metal plate is used as the basis, with electrophoretic layers on both sides, and a composite layer is hot-pressed on one side of the metal plate. The composite layer is composed of a glass fiber cloth layer and a resin layer, and the resin layer is arranged on the side of the glass fiber cloth layer facing the metal plate.
It reduces the processing difficulty and production cost of composite shells, while improving structural strength and reducing quality.
Smart Images
Figure CN223006856U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery casings, and in particular to a composite casing and a battery having the same. Background Art
[0002] The contemporary automotive industry is undergoing revolutionary changes, that is, traditional fuel vehicles are gradually being replaced by new energy vehicles, and among them, pure electric vehicles, as a type of new energy vehicle, are emerging. The power battery pack, as one of the core components of an electric vehicle, is composed of components such as battery modules, upper casings, lower casings, and water-cooled plates. The composite upper casing has advantages such as light weight, so it is widely used. However, in related technologies, the production of the composite upper casing is difficult and the production cost is high. Summary of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the utility model is to provide a composite casing with low production difficulty and low production cost.
[0004] The composite casing according to an embodiment of the utility model includes: a metal plate, both sides of which have electrophoretic layers; a composite layer, which is hot-pressed on one side of the metal plate facing the electrode assembly, and the composite layer includes a fiberglass cloth layer and a resin layer, and the resin layer is arranged on the side of the fiberglass cloth layer facing the metal plate.
[0005] For the composite casing according to an embodiment of the utility model, by arranging a composite layer that can be hot-pressed on the metal plate on one side of the metal plate facing the electrode assembly, and the composite layer is composed of a fiberglass cloth layer with advantages such as high strength, high temperature resistance, corrosion resistance, and good electrical insulation, and a resin layer with fluidity arranged on the fiberglass cloth layer, the processing difficulty can be reduced, the cost can be saved, and the composite casing of the present application can also have good structural strength and a light weight.
[0006] In addition, the composite casing according to the utility model may further have the following additional technical features:
[0007] In some embodiments of the utility model, the composite layer further includes a fiberglass mat layer, and the fiberglass mat layer is located on the side of the fiberglass cloth layer facing the metal plate.
[0008] In some embodiments of the utility model, the composite layer further includes a PU film. In the direction from the composite layer to the metal plate, the fiberglass cloth layer and the PU film are arranged in sequence, and the resin layer is arranged on the outer surface of the side of the PU film facing away from the fiberglass cloth layer.
[0009] In some embodiments of the utility model, the resin layer is also arranged on the side of the fiberglass cloth layer facing away from the metal plate.
[0010] In some embodiments of the present utility model, there are at least two layers of fiberglass cloth layers.
[0011] In some embodiments of the present utility model, the thickness H1 of the PU film satisfies: 0.05 mm ≤ H1 ≤ 0.1 mm.
[0012] In some embodiments of the present utility model, the metal plate is a steel plate.
[0013] In some embodiments of the present utility model, the thickness D1 of the steel plate satisfies: 0.7 mm ≤ D1 ≤ 0.8 mm; the thickness D2 of the electrophoretic layer satisfies: D2 > 30 μm.
[0014] In some embodiments of the present utility model, in the projection plane perpendicular to the direction of the metal plate, the metal plate is located within the composite layer, and the distance H2 between the outer peripheral edge of the metal plate and the outer peripheral edge of the composite layer satisfies: 0.5 mm ≤ H2 ≤ 1 mm.
[0015] The present utility model also provides a battery having the composite housing of the above embodiments.
[0016] For the battery according to the embodiments of the present utility model, by providing the composite housing of the above embodiments, the processing cost of the battery can be better reduced.
[0017] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:
[0019] Figure 1 is a layered schematic diagram of the composite housing according to the embodiments of the present utility model.
[0020] Reference numerals:
[0021] Metal plate 1, electrophoretic layer 11;
[0022] Composite layer 2, fiberglass cloth layer 21, fiberglass felt layer 22, PU film 23, resin layer 24. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0026] The following refers to Figure 1 Describe a composite housing according to an embodiment of the present utility model.
[0027] As Figure 1 shown, the composite housing according to an embodiment of the present utility model includes a metal plate 1 and a composite layer 2. Both sides of the metal plate 1 have electrophoretic layers 11. That is to say, the electrophoretic layers 11 can be constructed on both sides of the metal plate 1 by electrophoresis. The electrophoretic layers 11 can improve the corrosion resistance of the metal plate 1, increase the surface aesthetics and improve the durability.
[0028] Furthermore, the composite layer 2 is hot-pressed on one side of the metal plate 1 facing the electrode assembly (not shown). The composite layer 2 includes a fiberglass cloth layer 21 and a resin layer 24, and the resin layer 24 is disposed on the side of the fiberglass cloth layer 21 facing the metal plate 1. That is to say, the resin layer 24 can be first disposed on the surface of the fiberglass cloth layer 21. For example, the resin layer 24 can be sprayed on the fiberglass cloth layer 21 in a spraying manner, so that the resin layer 24 can partially infiltrate into the fiberglass cloth layer 21. Thus, when the composite layer 2 and the metal plate 1 are hot-pressed, the fiberglass cloth layer 21 can be pre-bonded to the metal plate 1 through the resin layer 24 having fluidity, so that the metal plate 1 can be better coated, and the consistency is better after hot pressing. Thereby, the processing difficulty can be reduced and the production cost can be saved.
[0029] Furthermore, the fiberglass cloth layer 21, the full name of the fiberglass cloth is Glass Fiber Fabric, which is a textile woven from glass fibers. The glass fiber filaments are fine filaments drawn from molten glass through a special process, and have the advantages of high strength, high temperature resistance, corrosion resistance, non-combustibility, dimensional stability, good electrical insulation, etc. The fiberglass cloth layer 21 is a cloth-like material layer formed by weaving or knitting these glass fiber filaments through a textile process. In this application, the glass fiber filaments can be woven in a perpendicular manner to construct the fiberglass cloth layer 21, so that the fiberglass cloth layer 21 can have better stress effects in two mutually perpendicular directions.
[0030] Thus, for the composite housing according to the embodiment of the present invention, by providing a composite layer 2 on one side of the metal plate 1 facing the electrode assembly and capable of being hot-pressed on the metal plate 1, and the composite layer 2 is composed of a fiberglass cloth layer 21 having the advantages of high strength, high temperature resistance, corrosion resistance, good electrical insulation, etc., and a resin layer 24 having fluidity disposed on the fiberglass cloth layer 21, the processing difficulty can be reduced and the cost can be saved. Moreover, the composite housing of this application can also have better structural strength and lighter quality.
[0031] In some embodiments of the present invention, as Figure 1 shown, the composite layer 2 further includes a fiberglass mat layer 22, and the fiberglass mat layer 22 is located on the side of the fiberglass cloth layer 21 facing the metal plate 1. The fiberglass mat layer 22 (Glass Fiber Felt) is another non-woven material mainly made of glass fibers. Different from the fiberglass cloth layer 21 woven through a textile process, the fiberglass mat layer 22 is a sheet-like or block-like material layer formed by interweaving or bonding glass fiber filaments, chopped fibers or powders under the action of mechanical or chemical methods. By providing the fiberglass mat layer 22, the resin layer 24 can be better infiltrated, so that the composite layer 2 has better structural strength and can also be better fixedly connected to the metal plate 1.
[0032] In a specific example of the present utility model, as Figure 1 shown, the composite layer 2 further includes a PU film 23. In the direction from the composite layer 2 to the metal plate 1, the fiberglass cloth layer 21, the fiberglass felt layer 22, and the PU film 23 are arranged in sequence, and the resin layer 24 is arranged on the outer surface of the side of the PU film 23 facing away from the fiberglass felt layer 22. The PU film 23, whose full name is Polyurethane Film, is a high-performance film material made of polyurethane. The PU film 23 in this example has good waterproof and insulation properties.
[0033] In some embodiments of the present utility model, as Figure 1 shown, the resin layer 24 is also arranged on the side of the fiberglass cloth layer 21 facing away from the metal plate 1. That is to say, the resin layer 24 can be arranged on both sides of the fiberglass cloth layer 21, which can further improve the waterproof and moisture-proof properties of the composite layer 2, and also improve the durability and surface texture, etc.
[0034] In some embodiments of the present utility model, there are at least two layers of the fiberglass cloth layer 21. Thus, by arranging two or more layers of the fiberglass cloth layer 21, the structural stability can be enhanced, the corrosion resistance of the composite layer 2 can be improved, and the fire resistance and heat insulation performance can also be enhanced.
[0035] In some embodiments of the present utility model, the thickness H1 of the PU film 23 satisfies: 0.05mm ≤ H1 ≤ 0.1mm. Meeting the above conditions, the PU film 23 can better enhance the structural strength of the composite layer 2.
[0036] In some embodiments of the present utility model, the metal plate 1 is a steel plate. Exemplarily, the composite housing is the upper housing of the battery, and the upper housing is used for hoisting under the vehicle body. By making the upper housing a steel plate, the structural strength of the upper housing can be better improved, so that the battery pack can be stably fixed under the vehicle body.
[0037] Exemplarily, the material of the steel plate is high-strength dual-phase steel or high-strength low-alloy steel, and the present utility model does not make any restrictions.
[0038] Optionally, the thickness D1 of the steel plate satisfies: 0.7mm ≤ D1 ≤ 0.8mm; meeting the above conditions, the steel plate can better protect the electrode assembly inside the composite housing, and has high reliability and good stability when hoisting the composite housing.
[0039] Optionally, the thickness D2 of the electrophoresis layer 11 satisfies: D2 > 30μm. Meeting the above conditions can better improve the corrosion resistance, high-temperature resistance, and impact resistance of the metal plate 1.
[0040] In some embodiments of the present utility model, within the projection plane perpendicular to the direction of the metal plate 1, the metal plate 1 is located within the composite layer 2, and the distance H2 between the outer peripheral edge of the metal plate 1 and the outer peripheral edge of the composite layer 2 satisfies: 0.5 mm ≤ H2 ≤ 1 mm. Thus, when hot pressing the composite layer 2 and the metal plate 1, the processing difficulty is relatively low, and the excess composite layer 2 can be cut off after hot pressing is completed.
[0041] Exemplarily, the metal plate 1 has a first through-hole, and the composite layer 2 has a second through-hole, and the first through-hole and the second through-hole are correspondingly arranged, and the aperture of the first through-hole is larger than the aperture of the second through-hole. That is to say, after the composite layer 2 is hot pressed on the metal plate 1, the second through-hole can be formed on the composite layer 2. To reduce the influence or damage to the metal plate 1, the aperture of the second through-hole is made smaller than the aperture of the first through-hole. Such a setting can also reduce the difficulty of processing the second through-hole.
[0042] Exemplarily, the first through-hole can be a mounting hole or a flange hole provided on the outer peripheral edge of the metal plate 1.
[0043] Exemplarily, the resin layer 24 is a polyurethane resin layer.
[0044] Exemplarily, the grammage of the glass fiber felt layer 22 is 200 g.
[0045] The present utility model also provides a battery having the composite housing of the above embodiments.
[0046] For the battery according to the embodiments of the present utility model, by providing the composite housing of the above embodiments, the processing cost of the battery can be preferably reduced.
[0047] Other components and operations of the composite housing and the battery according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.
[0048] In the description of this specification, the descriptions referring to terms such as "some embodiments", "optionally", "further" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0049] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A composite shell, characterized in that: include: A metal plate, both sides of the metal plate having an electrophoretic layer; A composite layer is hot pressed on the side of the metal plate facing the electrode assembly, the composite layer comprises a glass fiber cloth layer and a resin layer, and the resin layer is arranged on the side of the glass fiber cloth layer facing the metal plate.
2. The composite shell according to claim 1, characterized in that: The composite layer further includes a glass fiber felt layer, and the glass fiber felt layer is located on a side of the glass fiber cloth layer facing the metal plate.
3. The composite shell according to claim 1, characterized in that: The composite layer also includes a PU film. In the direction from the composite layer to the metal plate, the glass fiber cloth layer and the PU film are arranged in sequence. The resin layer is arranged on the outer surface of the PU film on a side away from the glass fiber cloth layer.
4. The composite shell according to any one of claims 1 to 3, characterized in that: The resin layer is also arranged on a side of the glass fiber cloth layer away from the metal plate.
5. The composite shell according to claim 1, characterized in that: The glass fiber cloth layer has at least two layers.
6. The composite shell according to claim 3, characterized in that: The thickness H1 of the PU film satisfies: 0.05 mm ≤ H1 ≤ 0.1 mm.
7. The composite shell according to claim 1, characterized in that: The metal plate is a steel plate.
8. The composite shell according to claim 7, characterized in that: The thickness D1 of the steel plate satisfies: 0.7 mm ≤ D1 ≤ 0.8 mm; the thickness D2 of the electrophoretic layer satisfies: D2 > 30 μm.
9. The composite shell according to claim 1, characterized in that: In a projection plane perpendicular to the direction of the metal plate, the metal plate is located in the composite layer, and a distance H2 between an outer periphery of the metal plate and an outer periphery of the composite layer satisfies: 0.5 mm ≤ H2 ≤ 1 mm.
10. A battery, characterized in that: A composite shell comprising any one of claims 1-9.