Carbon fiber composite material lithium battery reinforcing shell

Abstract

The utility model discloses a carbon fiber composite material lithium battery reinforcing shell. The device comprises a structural framework, an outer frame, a limiting piece and a sponge layer, the structural frame is of a square structure composed of four side faces, and a plurality of mortises are formed in the outer surface of each side face at intervals. The outer frame is composed of four outer frame plates, and the inner side face of each outer frame plate is provided with a plurality of tenons matched with mortises in the structural frame in an inserted mode. The sponge layer is clamped between the side face of the structural frame and the outer frame plate. And the plurality of limiting pieces are arranged on the inner surface of the side surface of the structural frame and are connected with the lithium battery through bolts. The structural frame and the outer frame which are made of the carbon fiber composite material are arranged on the outer side of the lithium battery body, so that the overall strength of the lithium battery is improved. Compared with the prior art, the carbon fiber composite material reinforcing shell can effectively increase the overall load bearing capacity of the lithium battery, so that the lithium battery is higher in structural stability, higher in strength and lighter in structure, and has wide application prospects in new energy automobiles, airplanes and other high-performance applications.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite materials and batteries, and specifically relates to a carbon fiber composite material lithium battery reinforced shell. Background Art

[0002] Nowadays, liquid lithium batteries have been widely used in new energy vehicles, but once they are squeezed, they will deform, which may cause battery short circuit and heat generation; in addition, new energy vehicles may also be subjected to external mechanical collisions, causing battery breakage or electrolyte leakage. The battery's own electric sparks or arcs caused by damage to the high-voltage part may ignite the leaked flammable electrolyte or other substances, causing the battery on the vehicle to explode, thereby causing the vehicle to catch fire.

[0003] At present, the shell materials of existing lithium batteries are mainly steel shells and aluminum shells. Most early lithium batteries were steel shells, and were mostly used as mobile phone batteries. Later, due to the low weight-to-energy ratio of steel shells and poor safety, they were gradually replaced by aluminum shells and soft-package lithium batteries. The aluminum shell is light in weight, durable in molding, and has good specific strength, but it should be noted that since aluminum is a metal material, it needs to be insulated to avoid the risk of short circuit. In addition, the mold opening cost of the aluminum shell is relatively high, which may limit its use in certain application scenarios. Therefore, a carbon fiber composite lithium battery reinforcement shell is needed to improve the above problems.

[0004] Compared with steel and aluminum, the tensile strength of T800-grade carbon fiber composite materials is more than 5 times higher than that of steel and more than twice that of aluminum; the elastic modulus is more than 2 times higher than that of steel and more than 1.5 times that of aluminum, with extremely high rigidity; the density is only about 1 / 4 of that of steel and about 1 / 3 of that of aluminum, with extremely high lightweight effect. However, its application in lithium battery packaging has not yet been found. Utility Model Content

[0005] The purpose of the utility model is to provide a carbon fiber composite material lithium battery reinforcement shell to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the carbon fiber composite material lithium battery reinforcement shell provided by the utility model includes a structural frame, an outer frame, a limiting plate and a sponge layer; wherein the structural frame is a U-shaped structure composed of four side surfaces, the interior of which is used to place lithium batteries, and a plurality of mortise holes are formed at intervals on the outer surface of each side surface; the outer frame is composed of four outer frame plates respectively arranged on the outside of the four side surfaces of the structural frame, and the inner side surface of each outer frame plate is provided with a plurality of tenons which are plugged into and matched with the mortise holes on the structural frame to maintain the stability of the connection between the structural frame and the outer frame; the sponge layer is sandwiched between the side surfaces of the structural frame and the outer frame plates; a plurality of limiting plates are installed on the inner surfaces of the side surfaces of the structural frame, and are connected to the lithium batteries by bolts, so as to limit the lithium batteries.

[0007] The structural frame is an integrated structure made of T800 grade carbon fiber composite material.

[0008] The outer frame is made of T800 grade carbon fiber composite material. A plurality of reinforcing convex strips are formed on the outer surface of each outer frame plate, and grooves are formed between adjacent reinforcing convex strips.

[0009] Compared with the prior art, the carbon fiber composite lithium battery reinforced shell provided by the utility model has the following beneficial effects:

[0010] By setting a carbon fiber composite material on the outside of the lithium battery body to make a structural frame and outer frame, the overall strength of the lithium battery is increased. Compared with the existing technology, the carbon fiber composite reinforced shell can effectively increase the overall load bearing capacity of the lithium battery, making its structure more stable, stronger and lighter, so it has a wide range of application prospects in new energy vehicles, aircraft and other high-performance applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the carbon fiber composite material lithium battery reinforced shell provided by the utility model when the battery cover is not added;

[0012] Figure 2 A schematic diagram of the three-dimensional structure of the carbon fiber composite material lithium battery reinforced shell provided by the utility model when a battery cover is added;

[0013] Figure 3 A top view of a carbon fiber composite lithium battery reinforced shell provided by the utility model;

[0014] Figure 4 A side sectional view of a carbon fiber composite lithium battery reinforcement shell provided by the utility model;

[0015] Figure 5 for Figure 1 A magnified image of the middle part;

[0016] Figure 6 for Figure 3 Enlarged view of part B in the middle;

[0017] Figure 7 This is an enlarged view of the tenon in the carbon fiber composite material lithium battery reinforcement shell provided by the utility model;

[0018] Figure 8 This is an enlarged view of the mortise in the carbon fiber composite material lithium battery reinforcement shell provided by the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-8As shown, the carbon fiber composite material lithium battery reinforcement shell provided by the utility model includes a structural frame 1, an outer frame 2, a limiting plate 5 and a sponge layer 6; wherein the structural frame 1 is a U-shaped structure consisting of four sides, the interior of which is used to place a lithium battery 4, and a plurality of mortises 8 are formed at intervals on the outer surface of each side; the outer frame 2 is composed of four outer frame plates respectively arranged on the outside of the four side surfaces of the structural frame 1, and a plurality of tenons 9 that are plugged into and matched with the mortises 8 on the structural frame 1 are provided on the inner side surface of each outer frame plate to maintain the stability of the connection between the structural frame 1 and the outer frame 2; the sponge layer 6 is sandwiched between the side surface of the structural frame 1 and the outer frame plate; a plurality of limiting plates 5 are installed on the inner surface of the side surface of the structural frame 1, and are connected to the lithium battery 4 by bolts, so as to limit the lithium battery 4.

[0020] The structural frame 1 is an integrated structure made of T800 grade carbon fiber composite material. T800 grade carbon fiber composite material has the characteristics of high strength, high modulus, light weight, corrosion resistance and fatigue resistance, with a tensile strength of 5490 to 5880 MPa, a tensile modulus of 294 GPa, a density of 1.80 to 1.81 g / cm3, and a post-impact compression strength of ≥280 MPa, which has significant advantages over steel and aluminum.

[0021] The outer frame 2 is made of T800 grade carbon fiber composite material. A plurality of reinforcing ridges 11 are formed on the outer surface of each outer frame plate, and grooves 3 are formed between adjacent reinforcing ridges 11 .

[0022] The use method and working principle of the carbon fiber composite lithium battery reinforced shell provided by the utility model are described as follows:

[0023] When in use, the lithium battery 4 is placed inside the structural frame 1, and multiple limit plates 5 are connected to the edges of the lithium battery 4 by bolts to limit the position of the lithium battery 4, and the wires 7 of the lithium battery 4 are led out of the reinforcing shell, and then the battery cover 10 is installed at the upper and lower ports of the structural frame 1. If the lithium battery 4 needs to be installed at the bottom of the new energy vehicle, there is no need to install the battery cover 10 at the upper port of the structural frame 1, but the vehicle floor can be used as the battery cover.

[0024] When the carbon fiber composite material lithium battery reinforced shell provided by the utility model is subjected to a side impact, the reinforcing ridges 11 on the outer frame 2 first bear the load and deform within its elastic range, thereby consuming a portion of the impact load; then the sponge layer 6 between the structural frame 1 and the outer frame 2 bears the impact and consumes another portion of the impact load through elastic deformation; the last portion of the impact load is borne by the structural frame 1, and the structural frame 1, the outer frame 2 and the sponge layer 6 work together to bear the load, thereby achieving the purpose of protecting the lithium battery 4.

Claims

1. A carbon fiber composite lithium battery reinforced shell, characterized in that: The carbon fiber composite material lithium battery reinforcement shell comprises a structural frame (1), an outer frame (2), a limiting plate (5) and a sponge layer (6); wherein the structural frame (1) is a square-shaped structure consisting of four side surfaces, the interior of which is used to place a lithium battery (4), and a plurality of mortises (8) are formed at intervals on the outer surface of each side surface; the outer frame (2) is composed of four outer frame plates respectively arranged on the outside of the four side surfaces of the structural frame (1), and the inner side surface of each outer frame plate is provided with a plurality of tenons (9) that are plugged into and matched with the mortises (8) on the structural frame (1) to maintain the stability of the connection between the structural frame (1) and the outer frame (2); the sponge layer (6) is sandwiched between the side surface of the structural frame (1) and the outer frame plate; a plurality of limiting plates (5) are installed on the inner surface of the side surface of the structural frame (1), and are connected to the lithium battery (4) by bolts, and are used to limit the lithium battery (4).

2. The carbon fiber composite lithium battery reinforced shell according to claim 1, characterized in that: The structural frame (1) is an integrated structure made of T800 grade carbon fiber composite material.

3. The carbon fiber composite lithium battery reinforced shell according to claim 1, characterized in that: The outer frame (2) is made of T800 grade carbon fiber composite material, and a plurality of reinforcing convex strips (11) are formed on the outer surface of each outer frame plate, and grooves (3) are formed between adjacent reinforcing convex strips (11).

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