High-voltage-resistant end cover of new energy lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a new energy lithium battery high-voltage-resistant end cover which comprises an end cover, and the end cover comprises an aluminum substrate, and an inner insulating layer and an outer insulating layer which are arranged on the inner surface and the outer surface of the aluminum substrate; the aluminum substrate is subjected to anodic oxidation, and then the surface is subjected to injection molding or plastic dipping to obtain an inner insulating layer and an outer insulating layer. The inner insulating layer and the outer insulating layer are made of PE plastic. The PE plastic has good insulation performance and chemical corrosion resistance, the electrical insulation and chemical stability of the end cover are improved, the surface hardness and corrosion resistance of the aluminum substrate are improved through anodic oxidation, and the overall durability of the end cover is improved. And the insulating layer formed by the injection molding or plastic dipping process can effectively improve the insulating property, prevent high-voltage breakdown and ensure the safety of the battery. After the insulating layer is thickened, the voltage endurance capability of the end cover is remarkably improved, and the requirement of a high-voltage battery is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a high-voltage resistant end cover for a new energy lithium battery. Background Art

[0002] With the rapid development of new energy technologies, lithium batteries, as an efficient and environmentally friendly energy storage method, have been widely used in various electronic devices, electric vehicles, and other fields. However, existing lithium battery end cap materials and structures have certain limitations, affecting the stability and safety of battery performance.

[0003] The barley paper and PET plastic end caps currently used in lithium batteries have relatively low strength and are easily affected by external environmental factors such as humidity and high and low temperatures, leading to problems such as cracking during battery operation. These materials also have poor weather resistance and are prone to performance degradation in harsh environments, impacting the battery's insulation performance. The insulation performance of existing materials cannot meet the requirements of high-voltage batteries, potentially leading to battery breakdown during operation.

[0004] In view of the above defects of the prior art, a new energy lithium battery high voltage resistant end cover is proposed to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the technical problem that in the above-mentioned prior art, lithium batteries generally use highland barley paper or PET plastic end cap cover plates, but due to the low strength of both, they are affected by environmental humidity, high and low temperatures, have poor weather resistance, crack, etc., which affects the insulation during battery operation.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A new energy lithium battery high-voltage resistant end cap, comprising an end cap, the end cap comprising an aluminum substrate and an inner insulating layer and an outer insulating layer provided on the inner and outer surfaces of the aluminum substrate;

[0008] After anodizing, the surface of the aluminum substrate is injection molded or dip-molded to obtain an inner insulating layer and an outer insulating layer.

[0009] Preferably, the inner insulating layer and the outer insulating layer are made of PE plastic.

[0010] PE plastic has good insulation properties and chemical corrosion resistance, which improves the electrical insulation and chemical stability of the end cap.

[0011] Preferably, a number of central positioning holes for mounting and positioning the lithium battery are evenly distributed on the end cover, and three auxiliary positioning holes are arranged in a circular pattern with equal distances outside the central positioning hole.

[0012] The central positioning hole facilitates accurate alignment of the battery during installation, improving the efficiency and accuracy of battery assembly. The auxiliary positioning holes provide additional fixing points, increasing the stability of the connection between the end cap and the battery housing.

[0013] Preferably, the central positioning hole is circular.

[0014] Preferably, the inner edge of the auxiliary positioning hole is an arc-shaped edge, the outer edge is a polygonal edge, and the arc-shaped auxiliary positioning hole has a V-shaped structure as a whole.

[0015] Preferably, the three auxiliary positioning holes are connected by a reinforcing strip that is an integral structure with the end cover, thereby increasing the overall strength of the end cover.

[0016] Preferably, a plurality of injection holes are evenly distributed on the end cap to ensure uniform distribution of the electrolyte and improve the performance and life of the battery.

[0017] Compared with the prior art, the technical effects and advantages of the utility model are:

[0018] The high-voltage-resistant end cap of the new energy lithium battery uses an ultra-thin aluminum substrate as the base material. After anodizing treatment, the surface is injection molded or dip-molded to thicken the insulation layer and significantly improve the pressure resistance to over 1500V. The high-voltage-resistant end cap is made of aluminum substrate and PE plastic, which effectively prevents high-voltage breakdown during impact and improves battery safety.

[0019] The end caps feature central and auxiliary positioning holes for easy battery installation and positioning. The arc-shaped and V-shaped auxiliary positioning holes enhance the end cap's strength and stability. Liquid injection holes are evenly spaced throughout the end caps to facilitate liquid injection during battery manufacturing.

[0020] In summary, the design of the high-voltage resistant end cover for lithium batteries of the present invention aims to address the defects of the existing technology, improve the insulation performance, safety and stability of the battery, and provide more reliable protection for the development of the new energy field. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This is an exploded view of the utility model;

[0023] Figure 3 It is a top view of the utility model.

[0024] In the figure: 1. end cap; 11. aluminum substrate; 12. inner insulation layer; 13. outer insulation layer; 14. center positioning hole; 15. auxiliary positioning hole; 16. reinforcement bar; 17. injection hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The following is combined with Figure 1-3 To further explain this application,

[0027] The embodiment of the present application discloses a high-voltage-resistant end cap for a new energy lithium battery, comprising an end cap 1, the end cap 1 comprising an aluminum substrate 11 and an inner insulating layer 12 and an outer insulating layer 13 provided on the inner and outer surfaces of the aluminum substrate 11;

[0028] After anodization, the aluminum substrate 11 is subjected to injection molding or dip molding on its surface to obtain an inner insulating layer 12 and an outer insulating layer 13. The inner insulating layer 12 and the outer insulating layer 13 are made of PE plastic.

[0029] Anodizing increases the surface hardness and corrosion resistance of the aluminum substrate 11, and improves the overall durability of the end cap 1. The insulating layer formed by the injection molding or dipping process can effectively improve the insulation performance, prevent high-voltage breakdown, and ensure the safety of the battery. After the insulating layer is thickened, the pressure resistance of the end cap 1 is significantly improved to meet the needs of high-voltage batteries. PE (polyethylene) plastic has good insulating properties and chemical corrosion resistance, which improves the electrical insulation and chemical stability of the end cap 1. PE plastic is lighter, which helps to reduce the weight of the end cap 1, thereby reducing the weight of the entire battery. PE plastic has a certain degree of flexibility and can absorb part of the impact energy, thereby improving the impact resistance of the end cap 1.

[0030] End cap 1 is provided with a number of evenly spaced central positioning holes 14 for securing and positioning the lithium battery. Three auxiliary positioning holes 15 are arranged equidistantly around the central positioning holes 14. The central positioning holes 14 are circular. The auxiliary positioning holes 15 have arcuate inner edges and polygonal outer edges, forming a V-shaped overall structure.

[0031] The center positioning hole 14 facilitates accurate alignment of the battery during installation, improving the efficiency and accuracy of battery assembly. The auxiliary positioning hole 15 provides an additional fixing point, increasing the stability of the connection between the end cover 1 and the battery housing. The circular hole is simple in design and easy to process, reducing manufacturing costs. The circular hole has a higher tolerance for positioning during installation, improving the adaptability of battery installation. The curved edge helps reduce wear on the battery housing and protects the housing from damage. The polygonal edge provides better support and positioning, increasing the stability of the connection. The V-shaped structure can absorb impact force to a certain extent, improving the durability of the end cover 1.

[0032] The three auxiliary positioning holes 15 are connected by a reinforcing strip 16 that is integrally formed with the end cap 1. This reinforcing strip 16 increases the overall strength of the end cap 1, preventing damage from external impacts. The integrated design simplifies the production process, reduces the number of components, and lowers costs.

[0033] The end cap 1 is provided with a plurality of injection holes 17 arranged evenly. The design of the injection holes 17 facilitates the injection operation during the battery manufacturing process, improving production efficiency. The evenly distributed injection holes 17 ensure that the electrolyte is evenly distributed, improving the performance and life of the battery.

[0034] The high-voltage end cap of the new energy lithium battery is anodized on the surface of the aluminum substrate 11 to enhance the hardness and corrosion resistance of the substrate, and then a PE plastic insulation layer is formed on the inner and outer surfaces of the aluminum substrate 11 by injection molding or dipping. These insulating layers not only improve the electrical insulation performance of the end cap 1, but also prevent high-voltage breakdown. The design of the center positioning hole 14 and the auxiliary positioning hole 15 on the end cap 1 ensure the precise alignment and stable fixation of the battery during the assembly process. The design of the reinforcement bar 16 further enhances the structural strength of the end cap 1, and the setting of the injection hole 17 facilitates the uniform injection of electrolyte during battery manufacturing.

[0035] First, due to the enhanced insulation layer and the use of PE plastic, the electrical insulation and pressure resistance of end cap 1 are significantly improved, effectively preventing battery breakdown under high-voltage conditions, thereby ensuring battery safety. At the same time, the structural design of end cap 1 improves the precision and stability of battery assembly, simplifies the production process, and reduces costs. The uniform arrangement of injection holes 17 allows for a more even distribution of the electrolyte, which not only improves battery performance but also extends the battery's service life, further enhancing the battery's overall quality and reliability.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new energy lithium battery high-voltage resistant end cap, comprising an end cap (1), characterized in that: The end cover (1) comprises an aluminum substrate (11) and an inner insulating layer (12) and an outer insulating layer (13) provided on the inner and outer surfaces of the aluminum substrate (11); After anodizing, the surface of the aluminum substrate (11) is injection molded or dip molded to obtain an inner insulating layer (12) and an outer insulating layer (13).

2. The high-voltage end cap for a new energy lithium battery according to claim 1, characterized in that: The inner insulating layer (12) and the outer insulating layer (13) are made of PE plastic.

3. The high-voltage end cap for a new energy lithium battery according to claim 1, characterized in that: A plurality of central positioning holes (14) for locating and installing the lithium battery are evenly arranged on the end cover (1), and three auxiliary positioning holes (15) are arranged in a circular pattern with equal distances outside the central positioning hole (14).

4. The high-voltage end cap for a new energy lithium battery according to claim 3, characterized in that: The center positioning hole (14) is circular.

5. The high-voltage end cap for a new energy lithium battery according to claim 3, characterized in that: The inner edge of the auxiliary positioning hole (15) is an arc-shaped edge, the outer edge is a polygonal edge, and the arc-shaped auxiliary positioning hole (15) is a V-shaped structure as a whole.

6. The high-voltage end cap for a new energy lithium battery according to claim 3, characterized in that: The three auxiliary positioning holes (15) are connected via a reinforcing strip (16) which is an integral structure with the end cover (1).

7. The high-voltage end cap for a new energy lithium battery according to claim 1, characterized in that: A plurality of liquid injection holes (17) are evenly distributed on the end cover (1).

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