Ultrathin cylindrical battery module packaging plastic shell

Abstract

The utility model discloses an ultrathin cylindrical battery module packaging plastic shell, and relates to the technical field of cylindrical high-voltage batteries. Comprising upper cavities and lower cavities, a plurality of upper cavities form an upper plastic shell, a plurality of lower cavities form a lower plastic shell, the upper plastic shell and the lower plastic shell are welded together in an ultrasonic hot melting mode to form a hollow sealed cavity, round holes are formed in the middle of the sealed cavity, and the part, between every two round holes, of the cavity is filled with foaming materials. The cylindrical battery pack is reasonable in structural design, the cylindrical battery pack can be effectively isolated, a certain single battery is prevented from burning, other single batteries are not affected, and the aim of reducing the spontaneous combustion risk is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylindrical high-voltage batteries, and particularly relates to a plastic shell for packaging an ultra-thin cylindrical battery module. Background Technique

[0002] The cylindrical high-voltage battery is one of the three cores of new energy vehicles, providing power for the motor and playing a decisive role in the driving range of new energy vehicles. The battery pack is located at the bottom of the vehicle body. During the vehicle's driving, long-term collisions and vibrations will accelerate battery aging. If a battery cell fails due to a short circuit and the battery module experiences thermal runaway, a chain reaction will be triggered, leading to vehicle fires. To address this safety hazard, the utility model designs a plastic shell for packaging an ultra-thin cylindrical battery module. Content of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a plastic shell for packaging an ultra-thin cylindrical battery module with a reasonable structural design, which can effectively isolate the cylindrical battery pack, prevent a single battery from burning without affecting other single batteries, and achieve the purpose of reducing the risk of spontaneous combustion.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions: A plastic shell for packaging an ultra-thin cylindrical battery module includes an upper cavity and a lower cavity. Multiple upper cavities form an upper plastic shell, and multiple lower cavities form a lower plastic shell. The upper plastic shell and the lower plastic shell are welded together by ultrasonic hot melting to form a hollow sealed cavity. There is a round hole in the middle of the sealed cavity, and the cavity part between each round hole is filled with foaming material.

[0005] Preferably, the wall thickness of the upper plastic shell and the lower plastic shell does not exceed 0.3 mm.

[0006] Preferably, a 0.7-mm flange is provided at the splicing shell opening of the upper plastic shell and the lower plastic shell.

[0007] Preferably, a flange is provided at the outer sealing position of the upper plastic shell and the lower plastic shell, and the inner sealing position is concave. The joint position of the upper plastic shell and the lower plastic shell can move up and down and does not necessarily have to be in the middle.

[0008] Preferably, a battery with a diameter of 18 mm is installed inside the round hole.

[0009] Preferably, the upper plastic shell and the lower plastic shell are made of ABS fiberglass material through an injection molding process.

[0010] Advantages of the present utility model: The structure of the present utility model is reasonably designed. The plastic shell is composed of an upper cavity and a lower cavity, both of which are made of ABS fiberglass material through an injection molding process. This material has high strength and stiffness, can withstand mechanical stress and impact strength, and has good chemical resistance and good electrical insulation properties. In the sealed cavity, the foaming material is injected into the plastic cavity through a foaming potting process to wrap the cylindrical battery module, achieving the best adhesion and optimal performance of the foaming material, and meeting the market requirements for the safety, lightweight, and thermal management of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be described in detail below with reference to the drawings and specific embodiments;

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model. SPECIFIC EMBODIMENTS

[0013] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] Referring to Figure 1 , the following technical solutions are adopted in this specific embodiment: An ultra-thin cylindrical battery module packaging plastic shell, including an upper cavity 1 and a lower cavity 2. A plurality of upper cavities 1 form an upper plastic shell, and a plurality of lower cavities 2 form a lower plastic shell. The upper plastic shell and the lower plastic shell are welded together by ultrasonic heat melting to form a hollow sealed cavity. There is a round hole 3 in the middle of the sealed cavity, and the cavity part between each round hole 3 is filled with a foaming material 5.

[0015] It should be noted that the wall thickness of the upper plastic shell and the lower plastic shell does not exceed 0.3 mm.

[0016] It should be noted that a 0.7 mm flange is provided at the splicing shell opening of the upper plastic shell and the lower plastic shell.

[0017] It should be noted that a bead 4 is provided at the external sealing position of the upper plastic shell and the lower plastic shell, and the internal sealing position is concave. The joint position of the upper plastic shell and the lower plastic shell can move up and down and is not necessarily in the middle.

[0018] It should be noted that a battery with a diameter of 18 mm is installed inside the round hole 3.

[0019] In addition, the upper plastic shell and the lower plastic shell are made of ABS fiberglass material through an injection molding process.

[0020] In this specific embodiment, the plastic housing is required to have a wall thickness not exceeding 0.3 mm after injection molding. In order to join the upper and lower plastic outer shells together, a 0.7-mm flange is provided at the joint opening. The upper and lower plastic outer shells are welded together by ultrasonic heat melting, finally forming a hollow sealed cavity. There can be a rim at the external sealing position, but it cannot protrude inside. There can be local concavities, and the joint position can be moved up and down, not necessarily in the middle. The inner cavity needs to be non-breaking (tentatively) under 3 atmospheres of pressure, but it can be deformed. When the inside is filled with water, the part still has the ability to maintain its shape, and an object with a diameter of 18 mm can pass through the inner circular hole. In the sealed cavity, the foaming material is injected into the plastic cavity through the foaming potting process to wrap the cylindrical battery module, achieving the best adhesion and optimal performance of the foaming material, and meeting the market requirements for the safety, lightweight, and thermal management of the battery module.

[0021] The above has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-thin cylindrical battery module packaging plastic shell, characterized in that: The invention comprises an upper cavity (1) and a lower cavity (2), wherein a plurality of upper cavities (1) form an upper plastic shell, and a plurality of lower cavities (2) form a lower plastic shell. The upper plastic shell and the lower plastic shell are welded together by ultrasonic hot melting to form a hollow sealed cavity. A circular hole (3) is provided in the middle of the sealed cavity, and a cavity portion between each circular hole (3) is filled with a foaming material (5).

2. The ultra-thin cylindrical battery module packaging plastic shell according to claim 1, characterized in that: The wall thickness of the upper plastic shell and the lower plastic shell does not exceed 0.3 mm.

3. The ultra-thin cylindrical battery module packaging plastic shell according to claim 1, characterized in that: The joint shell openings of the upper plastic shell and the lower plastic shell are provided with a 0.7 mm flange.

4. The ultra-thin cylindrical battery module packaging plastic shell according to claim 1, characterized in that: The outer sealing portions of the upper plastic shell and the lower plastic shell are provided with edges (4), and the inner sealing portions are concave.

5. The ultra-thin cylindrical battery module packaging plastic shell according to claim 1, characterized in that: A battery with a diameter of 18 mm is installed inside the circular hole (3).

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