Flame-retardant coated battery cover

Abstract

The utility model relates to a flame-retardant film-coated battery cover in the technical field of film coating, which comprises a cover body and a protective convex plate, the cover body is a base layer, a metal film layer is electroplated on the outer side surface of the base layer, a hollow filling groove is arranged in the cover body, a fireproof glass magnesium board is filled in the filling groove, and the protective convex plate is arranged in the fireproof glass magnesium board. A gap between the fireproof glass magnesium board and the filling groove is filled with a flame retardant for improving the flame retardant property; when a battery is broken and flames are generated, the flames may be in a bundle shape due to uneven pressure, the phenomenon of jetting occurs under the acting force of the pressure, the jetted bundle-shaped flames are primarily protected through the flame retardant, the flames are prevented from leaking out, and when the flame retardant rushes out of the hole shape by the pressure and is exposed out of the surface of the fireproof glass magnesium board, the flame retardant is prevented from leaking out of the surface of the fireproof glass magnesium board. The fireproof glass magnesium board is used for carrying out secondary protection on bunchy flames, the flames are prevented from leaking outwards, the flame is protected twice, the respective protection effect is achieved, and therefore the flame-retardant effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating technology, in particular to a flame-retardant coated battery cover. Background Art

[0002] A battery cover is a mechanical structure used in mechanical assembly to prevent the battery from falling. The battery cap functions to provide battery sealing, provide the function of a safety valve, or serve as a top cover. Electroplating is a process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It is a process of attaching a metal film to the surface of metal or other material parts by electrolysis to prevent metal oxidation, such as rust. The function of coating the battery cover is to increase the wear resistance, electrical conductivity, reflectivity, corrosion resistance of the battery cover, such as copper sulfate, and enhance aesthetics.

[0003] There is a Chinese patent with the publication number CN216808662U for reference. It discloses a battery cover made of glass fiber-reinforced halogen-free flame-retardant PP material for new energy vehicles, which relates to the technical field of battery covers. To solve the problem that in the existing battery cover, if the round holes on the battery box are not sealed and used for a long time, some dust will enter through the round holes on the battery box, and when too much dust accumulates, it may cause a short circuit. It includes a battery top cover, the battery top cover is a rectangular structure, and through holes are opened at both left and right ends of the battery top cover; a protective cover, through holes are opened at both left and right ends of the protective cover, and the protective cover is slidably installed on the top of the battery top cover; a fixing block, the fixing block is a rectangular structure. In this utility model, the round holes on the battery top cover and the protective cover are respectively blocked, so that dust cannot enter the battery box, avoiding the short circuit that may be caused by too much dust in the battery box.

[0004] Although this patent discloses the structure of a battery cover made of halogen-free flame-retardant PP material, it does not have the effect of secondary flame retardancy inside. When the battery ruptures and generates flames, due to uneven pressure, the flames may appear in a bundle shape and spray under the action of pressure. Under the pressure spray of the bundle-shaped flames, the halogen-free flame-retardant PP material may be broken through by the pressure, causing the flames to leak out. Since it does not have a secondary protection structure inside, it may cause the flames to spread to the outside of the battery cover. Therefore, the inventor of this application proposes a flame-retardant coated battery cover to solve the above technical problem of adding a secondary protection structure inside the battery cover to reduce the flame leakage caused by the pressure spray of the bundle-shaped flames. Summary of the Utility Model

[0005] The utility model aims to provide a technical solution to overcome the above deficiencies.

[0006] A flame-retardant coated battery cover includes a cover body and a protective convex plate. The cover body and the protective convex plate are of an integrally formed structure. The cover body is the base layer, and a metal film layer is electroplated on the outer side of the base layer. A hollow filling groove is formed inside the cover body. The cover body and the filling groove are in a C shape. One end of the filling groove is open. A fireproof magnesium oxychloride board is filled inside the filling groove. A flame retardant for enhancing the flame-retardant performance is filled in the gap between the fireproof magnesium oxychloride board and the filling groove. The fireproof magnesium oxychloride board has excellent fireproof performance. Even when facing a high temperature of 800 - 1200 °C, it will not catch fire, can absorb heat, and resist high temperature for up to 3 hours. It belongs to a non-combustible board, and the flame continuous burning time is zero. In a humid environment, the fireproof magnesium oxychloride board can maintain stable performance, reduce the probability of deformation or distortion due to humidity, and can also effectively isolate moisture. When the battery ruptures and generates a flame, due to uneven pressure, the flame may appear in a bundle shape and spray under the action of pressure. The flame retardant initially protects the sprayed bundle-shaped flame to prevent the flame from leaking out. When the flame retardant is flushed out of the hole by the pressure and exposes the surface of the fireproof magnesium oxychloride board, the fireproof magnesium oxychloride board provides secondary protection for the bundle-shaped flame to prevent the flame from leaking out, thus achieving the flame-retardant effect.

[0007] The metal film layer is composed of metallic zinc; electroplating metallic zinc is used to protect the surface of the battery cover from corrosion. Electrogalvanizing is a surface finishing method that forms a zinc layer on the metal surface through electrochemical deposition. It provides a cheap but efficient method to protect metal objects from corrosion. Electrogalvanizing has the characteristics of good corrosion resistance, fine and uniform combination, and is not easily penetrated by corrosive gases or liquids. Using metallic zinc as the material of the metal film layer can effectively protect the surface of the battery cover for a long time and increase its service life.

[0008] Furthermore, the flame retardant is composed of a PP non-halogen flame retardant. The main components of the PP non-halogen flame retardant are inorganic phosphorus-nitrogen flame retardant monomers, mainly including piperazine pyrophosphate, ammonium polyphosphate, aluminum hypophosphite, aluminum hydroxide and other formulation systems. The flame retardant mechanism of the PP non-halogen flame retardant is that the phosphorus, nitrogen, and carbon components in the flame retardant jointly produce non-combustible gases with flame-retardant effects, a phosphate ester coating layer, and a carbon layer with an insulating effect. The three work together synergistically to achieve the flame-retardant effect. Using the PP non-halogen flame retardant as the flame retardant and cooperating with the fireproof magnesium oxychloride board for flame retardancy can reduce the phenomenon of flame leakage when the battery sprays flames.

[0009] Further, a sealing cover is connected to the surface of the cover body, and an interference fit is provided between the sealing cover and the filling groove; the interference fit can ensure a tight contact between the sealing cover and the filling groove, effectively preventing external impurities, dust or liquid from entering, ensuring the purity and safety of the internal environment. Moreover, the interference fit makes the sealing cover not easy to loosen or fall off when subjected to external forces, improving the stability of the overall structure. At the same time, it helps to reduce wear and damage, thus extending the service life of the product. It also prevents the fireproof magnesite board and the flame retardant from leaking from the inside of the cover body to the outside of the cover body.

[0010] Further, one end of the cover body is a convex platform, and the cover body and the convex platform are of an integrally formed structure; adopting this structure makes the connection between the cover body and the convex platform stronger, not easy to loosen or fall off, thereby enhancing the stability and reliability of the overall structure. Secondly, the integrally formed structure reduces the assembly steps in the production process, improves production efficiency, and reduces production costs. The integrally formed structure also makes there be no gap at the connection between the cover body and the convex platform, reducing the accumulation of dust and dirt, and being easy to clean and maintain.

[0011] Further, reinforcing ribs for increasing the connection stability are respectively provided at both ends of the protective convex plate, and one end of the reinforcing rib extends beyond the surface of the protective convex plate; the extended reinforcing rib forms a stronger bond with adjacent components during connection, thereby enhancing the overall connection strength of the cover body, further improving the stability and firmness of the connection. At the same time, when subjected to external forces or pressure, the extended reinforcing rib can better disperse these forces, playing a role in stress dispersion, reducing the direct impact on the protective convex plate, and thus extending the service life of the component.

[0012] Further, a positioning block for paired connection with an external battery compartment is provided at one end of the cover body, and a card slot for paired connection with the external battery compartment is opened on the surface of the cover body, and the card slot penetrates the surface of the cover body; since the positioning block is positioned with the positioning slot of the external battery compartment, the paired connection with the external battery compartment is more direct, without additional operations, greatly improving the connection efficiency. When the external battery compartment is paired with the card slot, due to the through design of the card slot, the connection between the battery compartment and the cover body is closer, enhancing the stability of the overall structure.

[0013] Further, a number of anti-slip lines for increasing friction are provided on the surface of the cover body, and the anti-slip lines are linearly arranged on the surface of the cover body, and the distance between adjacent two anti-slip lines is equally spaced; the equally spaced anti-slip lines can ensure the uniform distribution of the friction force on the surface of the cover body. When the user uses or operates the cover body, whether the hand or other objects contact it, a stable and consistent anti-slip effect can be obtained, improving the safety and stability of use.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: A hollow filling groove is provided inside the cover body, and a fireproof magnesium oxychloride board is filled inside the filling groove. A flame retardant for enhancing the flame retardant performance is filled in the gap between the fireproof magnesium oxychloride board and the filling groove. When the battery ruptures and generates a flame, due to uneven pressure, the flame may appear in a beam shape and be ejected under the action of the pressure. The flame retardant initially protects the ejected beam-shaped flame to prevent the flame from leaking out. When the flame retardant is flushed out of the holes by the pressure and exposes the surface of the fireproof magnesium oxychloride board, the fireproof magnesium oxychloride board provides secondary protection for the beam-shaped flame to prevent the flame from leaking out. By protecting the flame twice and playing a role of separate protection, the flame retardant effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of a flame retardant coated battery cover;

[0016] Figure 2 is another perspective view of a flame retardant coated battery cover;

[0017] Figure 3 is a schematic diagram of the internal structure of a flame retardant coated battery cover;

[0018] In the figure: cover body - 1, protective convex plate - 2, base layer - 3, metal layer - 4, filling groove - 5, fireproof magnesium oxychloride board - 6, flame retardant - 7, sealing cover - 8, convex platform - 9, reinforcing rib - 10, positioning block - 11, card slot - 12, anti-slip pattern - 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.

[0020] In this embodiment, please refer to Figures 1 - 3, A flame-retardant coated battery cover in its specific implementation includes a cover body 1 and a protective convex plate 2. The cover body 1 and the protective convex plate 2 are of an integrally formed structure. The cover body 1 is a base layer 3, and a metal film layer 4 is electroplated on the outer side of the base layer 3. A hollow filling groove 5 is provided inside the cover body 1. The cover body 1 and the filling groove 5 are in a C shape. One end of the filling groove 5 is open. A fireproof magnesium oxychloride board 6 is filled inside the filling groove 5. A flame retardant 7 for enhancing the flame retardant performance is filled in the gap between the fireproof magnesium oxychloride board 6 and the filling groove 5. The fireproof magnesium oxychloride board 6 has excellent fireproof performance. Even when facing a high temperature of 800 - 1200 °C, it will not catch fire, can absorb heat, and resist high temperature for up to 3 hours. It belongs to a non-combustible board, and the flame continuous burning time is zero. In a humid environment, the fireproof magnesium oxychloride board 7 can maintain stable performance, reduce the probability of deformation or distortion due to humidity, and can also effectively isolate moisture. When the battery ruptures and generates a flame, due to uneven pressure, the flame may appear in a bundle shape and spray under the action of pressure. The flame retardant 7 initially protects the sprayed bundle-shaped flame to prevent the flame from leaking out. When the flame retardant 7 is washed out by pressure and exposes the surface of the fireproof magnesium oxychloride board 6, the fireproof magnesium oxychloride board 6 provides secondary protection for the bundle-shaped flame to prevent the flame from leaking out, thereby achieving the flame retardant effect;

[0021] The metal film layer 4 is composed of metallic zinc; electroplating metallic zinc protects the surface of the battery cover from corrosion; electrogalvanizing is a surface finishing method that forms a zinc layer on the metal surface through electrochemical deposition. It provides a cheap but efficient method to protect metal objects from corrosion. Electrogalvanizing has the characteristics of good corrosion resistance, fine and uniform combination, and not being easily penetrated by corrosive gases or liquids. Using metallic zinc as the material of the metal film layer 4 can effectively protect the surface of the battery cover for a long time and increase its service life.

[0022] The flame retardant 7 is composed of a PP non-halogen flame retardant. The main components of the PP non-halogen flame retardant are inorganic phosphorus-nitrogen flame retardant monomers, mainly including piperazine pyrophosphate, ammonium polyphosphate, aluminum hypophosphite, aluminum hydroxide and other formulation systems. The flame retardant mechanism of the PP non-halogen flame retardant is that the phosphorus, nitrogen, and carbon components in the flame retardant jointly produce non-combustible gases with flame retardant effects, a phosphate ester coating layer, and a carbon layer with an insulating effect. The three work together synergistically to achieve the flame retardant effect. Using the PP non-halogen flame retardant as the flame retardant 7 and cooperating with the fireproof magnesium oxychloride board 6 for flame retardancy can reduce the phenomenon of flame leakage when the battery sprays flames.

[0023] A sealing cover 8 is connected to the surface of the cover body 1, and an interference fit is provided between the sealing cover 8 and the filling groove 5; the interference fit can ensure a tight contact between the sealing cover 8 and the filling groove 5, effectively preventing external impurities, dust or liquid from entering, ensuring the purity and safety of the internal environment. Moreover, the interference fit makes the sealing cover 8 not easy to loosen or fall off when subjected to external forces, improving the stability of the overall structure. At the same time, it helps to reduce wear and damage, thus extending the service life of the product. It also prevents the fireproof magnesite board 6 and the flame retardant 7 from leaking from the inside of the cover body 1 to the outside of the cover body 1.

[0024] One end of the cover body 1 is a boss 9, and the cover body 1 and the boss 9 are of an integrally formed structure; adopting this structure makes the connection between the cover body 1 and the boss 9 more firm, not easy to loosen or fall off, thus enhancing the stability and reliability of the overall structure. Secondly, the integrally formed structure reduces the assembly steps in the production process, improves production efficiency, and reduces production costs. The integrally formed structure also makes there be no gap at the connection between the cover body 1 and the boss 9, reducing the accumulation of dust and dirt, and being easy to clean and maintain.

[0025] Reinforcing ribs 10 for increasing connection stability are respectively provided at both ends of the protective convex plate 2, and one end of the reinforcing rib 10 extends beyond the surface of the protective convex plate 2; the extended reinforcing rib 10 forms a firmer combination with adjacent components during connection, thus enhancing the overall connection strength of the cover body 1, further improving the stability and firmness of the connection. At the same time, when subjected to external forces or pressures, the extended reinforcing rib 10 can better disperse these forces, playing a role in stress dispersion, reducing the direct impact on the protective convex plate 2, and thus extending the service life of the component.

[0026] A positioning block 11 for paired connection with an external battery compartment is provided at one end of the cover body 1, and a card slot 12 for paired connection with the external battery compartment is opened on the surface of the cover body 1, and the card slot 12 penetrates the surface of the cover body 1; since the positioning block 11 is positioned with the positioning slot of the external battery compartment, the paired connection with the external battery compartment is more direct, without additional operations, greatly improving the connection efficiency. When the external battery compartment is paired with the card slot 12, due to the through design of the card slot 12, the connection between the battery compartment and the cover body is tighter, enhancing the stability of the overall structure.

[0027] A number of anti-slip lines 13 for increasing friction are provided on the surface of the cover body 1, and the anti-slip lines 13 are linearly arranged on the surface of the cover body 1, and the distance between adjacent two anti-slip lines 13 is equally spaced; the equally spaced anti-slip lines 13 can ensure the uniform distribution of the friction force on the surface of the cover body 1. When the user uses or operates the cover body, whether the hand or other objects contact it, a stable and consistent anti-slip effect can be obtained, improving the safety and stability of use.

[0028] The design key point of the present utility model lies in that: a hollow filling groove 5 is provided inside the cover body 1, and a fireproof magnesium oxychloride board 6 is filled inside the filling groove 5. A flame retardant 7 for increasing the flame retardant performance is filled in the gap between the fireproof magnesium oxychloride board 6 and the filling groove 5. When the battery bursts and generates a flame, due to the uneven pressure, the flame may appear in a bundle shape and be ejected under the action of the pressure. The flame retardant 7 initially protects the ejected bundle-shaped flame to prevent the flame from leaking out. When the flame retardant 7 is flushed out of the hole and exposes the surface of the fireproof magnesium oxychloride board 6, the fireproof magnesium oxychloride board 6 provides secondary protection for the bundle-shaped flame to prevent the flame from leaking out. Through the two protections of the flame, the role of separate protection is achieved, thereby achieving the flame retardant effect.

[0029] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, which should all be regarded as the protection scope of the present utility model.

Claims

1. A flame-retardant coated battery cover, comprising a cover body and a protective convex plate, characterized in that: The cover body and the protective convex plate are of an integrally formed structure. The cover body is the base layer, and a metal film layer is electroplated on the outer side surface of the base layer. A hollow filling groove is formed inside the cover body. The cover body and the filling groove are in a U-shaped configuration. One end of the filling groove is open. A fireproof magnesium oxychloride board is filled inside the filling groove, and a flame retardant for increasing the flame retardant property is filled in the gap between the fireproof magnesium oxychloride board and the filling groove.

2. The flame-retardant coating battery cover according to claim 1, wherein: The flame retardant is composed of a PP halogen-free flame retardant.

3. The flame-retardant coated battery cover according to claim 1, wherein: A sealing cover is connected to the surface of the cover body, and an interference fit is provided between the sealing cover and the filling groove.

4. A flame-retardant coated battery cover according to any one of claims 1-3, characterized in that: One end of the cover body is a convex platform, and the cover body and the convex platform are of an integrally formed structure.

5. A flame-retardant coated battery cover according to any one of claims 1-3, characterized in that: Reinforcing ribs for increasing the connection stability are respectively provided at both ends of the protective convex plate, and one end of the reinforcing rib extends beyond the surface of the protective convex plate.

6. A flame-retardant coated battery cover according to any one of claims 1-3, characterized in that: A positioning block for paired connection with an external battery compartment is provided at one end of the cover body, and a card slot for paired connection with the external battery compartment is formed on the surface of the cover body, and the card slot penetrates through the surface of the cover body.

7. A flame-retardant coated battery cover according to any one of claims 1-3, characterized in that: A plurality of anti-slip lines for increasing the friction force are provided on the surface of the cover body. The anti-slip lines are linearly arranged on the surface of the cover body, and the distance between adjacent two anti-slip lines is equally spaced.

Images