Metallized film capacitor with flame retardant structure and preparation method thereof

Abstract

The present invention provides a metallized film capacitor with a flame-retardant structure, comprising a capacitor body, an elastic protective layer, a fire extinguishing agent storage ball, and a protective member. The outer side of the capacitor body is wrapped with an elastic protective layer, and the outer wall of the capacitor body is evenly provided with spikes disposed within the elastic protective layer. A fire extinguishing agent storage ball is disposed outside the elastic protective layer, and the fire extinguishing agent storage ball is filled with fire extinguishing agent at high pressure. A protective member is fixed to the outer wall of the capacitor body, and the protective member protrudes to the outside of the fire extinguishing agent storage ball. The advantage of the present invention is that, regardless of whether the metallized film capacitor expands internally or is squeezed by external pressure, a collision between the fire extinguishing agent storage ball and the spikes can occur, causing the fire extinguishing agent in the fire extinguishing agent storage ball to be ejected in a timely manner, thereby preventing the metallized film capacitor from burning and improving the flame retardancy of the metallized film capacitor.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a metallized film capacitor with a flame retardant structure and a preparation method thereof. Background Art

[0002] The role of capacitors in circuits: In DC circuits, capacitors act as circuit breakers. Capacitors are components that store electrical charge and are one of the most commonly used electronic components. They are categorized by structure into three main types: fixed capacitors, variable capacitors, and trimmer capacitors. They are also categorized by electrolyte into organic, inorganic, electrolytic, and air-dielectric capacitors.

[0003] When using existing metallized film capacitors, if an accident occurs inside the metallized film capacitor or a collision occurs outside the metallized film capacitor, it is easy to cause the metallized film capacitor to burn, causing damage to the metallized film capacitor, and there are certain safety hazards, and the use effect is poor. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a metallized film capacitor with a flame retardant structure and a preparation method thereof.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] A metallized film capacitor with a flame-retardant structure includes a capacitor body, an elastic protective layer, a fire extinguishing agent storage ball, and a protective member. The outer side of the capacitor body is wrapped with the elastic protective layer, and the outer wall of the capacitor body is evenly provided with spurs arranged inside the elastic protective layer. The fire extinguishing agent storage ball is provided outside the elastic protective layer, and the fire extinguishing agent storage ball is filled with fire extinguishing agent at high pressure. The protective member is fixed to the outer wall of the capacitor body, and the protective member protrudes outside the fire extinguishing agent storage ball.

[0007] The outer side of the fire extinguishing agent storage ball is provided with a protective layer for limiting the fire extinguishing agent storage ball;

[0008] The inner wall of the protective layer is evenly provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are used to clamp and receive the limited fire extinguishing agent storage ball;

[0009] A fixing plate is provided at the middle position inside the elastic protective layer, and a through hole for the thorn to pass through is opened in the fixing plate.

[0010] Preferably, the protective member includes a protective rod, an arc-shaped fixing rod and a positioning bolt. The two ends of the arc-shaped fixing rod are fixed to the capacitor body by positioning bolts. Multiple protective rods are evenly fixed on the side wall of the arc-shaped fixing rod. The protective rod is vertically fixed on the arc-shaped fixing rod. The arc-shaped side of the arc-shaped fixing rod protrudes outside the fire extinguishing agent storage ball.

[0011] A method for preparing a metallized film capacitor with a flame retardant structure comprises the following steps:

[0012] S1. Spike installation: Evenly adhere the spikes to the outer wall of the capacitor body with glue. The length of the spikes should be less than the thickness of the elastic protective layer.

[0013] S2. Burr wrapping: Cover the capacitor body with an elastic protective layer and wrap the burr;

[0014] S3. Installation of fire extinguishing agent storage balls: First, fill the fire extinguishing agent storage balls with high pressure, and evenly fix the fire extinguishing agent storage balls on the elastic protective layer, with the fire extinguishing agent storage balls corresponding to the punctures one by one;

[0015] S4. Definition of protective element: The protective element is fixed on the outer wall of the capacitor body and is located outside the fire extinguishing agent storage ball;

[0016] S5. Overall fixing of the protective parts: The protective parts on multiple surfaces of the capacitor body are bonded to each other so that the multiple protective parts are connected as a whole.

[0017] Preferably, a fixing plate is provided inside the elastic protective layer, a through hole for passing the spur is provided on the fixing plate, and the fixing plate as a whole limits the position of the spur.

[0018] Preferably, the outer side of the fire extinguishing agent storage ball is wrapped with a protective layer, and the protective layer is an integral structure.

[0019] The advantages of the present invention are that a fire extinguishing agent storage ball filled with high-pressure fire extinguishing agent is provided on the outside of the capacitor body, and a thorn is provided between the fire extinguishing agent storage ball and the capacitor body. With this structural arrangement, no matter whether the metallized film capacitor expands internally or is squeezed by external pressure, the fire extinguishing agent storage ball and the thorn can collide with each other, so that the fire extinguishing agent in the fire extinguishing agent storage ball is sprayed out in time, thereby preventing the metallized film capacitor from burning and improving the flame retardant effect of the metallized film capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a metallized film capacitor with a flame retardant structure according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the connection between the elastic protective layer and the protective layer according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the elastic protective layer according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a protective element according to an embodiment of the present invention;

[0024] Figure 5 2 is a top view of a fixing plate according to an embodiment of the present invention.

[0025] Numbers in the figure: 10, capacitor body, 20, elastic protective layer, 21, fixing plate, 22, thorn, 23, through hole, 30, fire extinguishing agent storage ball, 40, protective part, 41, protective rod, 42, arc-shaped fixing rod, 43, positioning bolt, 50, protective layer. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example

[0027] like Figure 1-2 As shown, the metallized film capacitor with a flame-retardant structure described in this embodiment includes a capacitor body 10, an elastic protective layer 20, a fire extinguishing agent storage ball 30 and a protective member 40. The outer side of the capacitor body 10 is wrapped with an elastic protective layer 20, and the outer wall of the capacitor body 10 is evenly provided with thorns 22 arranged inside the elastic protective layer 20. The outer side of the elastic protective layer 20 is provided with a fire extinguishing agent storage ball 30, and the fire extinguishing agent storage ball 30 is filled with fire extinguishing agent at high pressure. A protective member 40 is fixed on the outer wall of the capacitor body 10, and the protective member 40 protrudes to the outside of the fire extinguishing agent storage ball 30.

[0028] A fire extinguishing agent storage ball 30 filled with high-pressure fire extinguishing agent is provided on the outside of the capacitor body 10, and a thorn 22 is provided between the fire extinguishing agent storage ball 30 and the capacitor body 10. With this structural arrangement, no matter the metallized film capacitor expands internally or is squeezed by external pressure, a collision can occur between the fire extinguishing agent storage ball 30 and the thorn 22, so that the fire extinguishing agent in the fire extinguishing agent storage ball 30 is sprayed out in time, preventing the metallized film capacitor from burning, and making the metallized film capacitor have a better flame retardant effect; in addition, a protective member 40 is fixed on the outside of the capacitor body 10, and the protective member 40 protrudes to the outside of the fire extinguishing agent storage ball 30. This structure can, on the one hand, prevent the capacitor body 10 from accidentally colliding with objects and causing damage to the fire extinguishing agent storage ball 30, and on the other hand, it can provide buffering protection for the capacitor body 10, so that the use effect of the capacitor body 10 is better.

[0029] like Figure 2As shown, a protective layer 50 is provided on the outer side of the fire extinguishing agent storage ball 30 to limit the fire extinguishing agent storage ball 30 .

[0030] By providing the protective layer 50 , on the one hand, the position of the fire extinguishing agent storage ball 30 can be restricted, and on the other hand, the fire extinguishing agent storage ball 30 and the capacitor body 10 can be safely protected, resulting in a better use effect.

[0031] like Figure 2 As shown, the inner wall of the protective layer 50 is evenly provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are used to clamp and limit the fire extinguishing agent storage ball 30. Through this structural setting, the position of the fire extinguishing agent storage ball 30 can be further limited, making the position of the fire extinguishing agent storage ball 30 more stable and preventing shaking. At the same time, this structure can also make the position of the protective layer 50 more stable and achieve better use effect.

[0032] like Figure 3 and Figure 5 As shown, a fixing plate 21 is provided in the middle of the elastic protective layer 20 , and a through hole 23 for the spur 22 to pass through is opened in the fixing plate 21 .

[0033] The fixing plate 21 provided in the elastic protective layer 20 can, on the one hand, make the position of the protrusion 22 more stable and the protrusion 22 will not shake; on the other hand, it can make the overall shape of the elastic protective layer 20 more stable. In addition, through the provision of the elastic protective layer 20, the expansion and contraction range of the elastic protective layer 20 can be reduced, thereby preventing the protrusion 22 from accidentally hitting the fire extinguishing agent storage ball 30, and achieving a better use effect.

[0034] like Figure 4 As shown, the protective member 40 includes a protective rod 41, an arc-shaped fixing rod 42 and a positioning bolt 43. The two ends of the arc-shaped fixing rod 42 are fixed to the capacitor body 10 by the positioning bolts 43. A plurality of protective rods 41 are evenly fixed on the side wall of the arc-shaped fixing rod 42. The protective rod 41 is vertically fixed to the arc-shaped fixing rod 42. The arc-shaped side of the arc-shaped fixing rod 42 protrudes outside the fire extinguishing agent storage ball 30.

[0035] The two ends of the arc-shaped fixing rod 42 are fixed to the capacitor body 10 by positioning bolts 43. A plurality of protective rods 41 are evenly fixed on the side walls of the arc-shaped fixing rod 42. The protective rods 41 are vertically fixed to the arc-shaped fixing rod 42. This structural setting can, on the one hand, provide safe protection for the fire extinguishing agent storage ball 30, and on the other hand, facilitate the assembly and disassembly operations of the protective member 40, so that the protective member 40 can be reused and the use effect is better.

[0036] A method for preparing a metallized film capacitor with a flame retardant structure comprises the following steps:

[0037] S1. Install the spurs 22: Evenly adhere the spurs 22 to the outer wall of the capacitor body 10 with glue. The length of the spurs should be less than the thickness of the elastic protective layer 20.

[0038] S2, wrapping the spur 22: covering the capacitor body 10 with the elastic protective layer 20 and wrapping the spur 22;

[0039] S3. Installing the fire extinguishing agent storage balls 30: First, fill the fire extinguishing agent storage balls 30 with high pressure, and evenly fix the fire extinguishing agent storage balls 30 on the elastic protective layer 20, with the fire extinguishing agent storage balls 30 corresponding to the thorns 22 one by one;

[0040] S4, defining the protective member 40: fixing the protective member 40 on the outer wall of the capacitor body 10, and the protective member 40 is located outside the fire extinguishing agent storage ball 30;

[0041] S5. Fixing the protective members 40 as a whole: The protective members 40 on multiple surfaces of the capacitor body 10 are bonded to each other in pairs, so that the multiple protective members 40 are connected as a whole.

[0042] A fixing plate 21 is provided inside the elastic protective layer 20 . A through hole 23 is provided on the fixing plate 21 for passing through the spur 22 . The fixing plate 21 as a whole restricts the position of the spur 22 .

[0043] The fixing plate 21 provided in the elastic protective layer 20 can, on the one hand, make the position of the protrusion 22 more stable and the protrusion 22 will not shake. On the other hand, it can make the overall shape of the elastic protective layer 20 more stable. In addition, through the provision of the elastic protective layer 20, the expansion and contraction range of the elastic protective layer 20 can be reduced, thereby preventing the protrusion 22 from accidentally hitting the fire extinguishing agent storage ball 30 and causing damage to the fire extinguishing agent storage ball 30, thereby making the overall flame retardant effect of the capacitor body 10 better.

[0044] The fire extinguishing agent storage ball 30 is wrapped with a protective layer 50 on the outside, and the protective layer 50 is an integral structure.

[0045] It should be noted that, in this document, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A metallized film capacitor with a flame retardant structure, characterized in that: The invention comprises a capacitor body (10), an elastic protective layer (20), a fire extinguishing agent storage ball (30) and a protective member (40), wherein the outer side of the capacitor body (10) is wrapped with the elastic protective layer (20), the outer wall of the capacitor body (10) is evenly provided with thorns (22) arranged inside the elastic protective layer (20), the outer side of the elastic protective layer (20) is provided with a fire extinguishing agent storage ball (30), the fire extinguishing agent storage ball (30) is filled with fire extinguishing agent at high pressure, and the protective member (40) is fixed on the outer wall of the capacitor body (10), and the protective member (40) protrudes to the outside of the fire extinguishing agent storage ball (30); A protective layer (50) is provided on the outside of the fire extinguishing agent storage ball (30) to restrict the fire extinguishing agent storage ball (30); The inner wall of the protective layer (50) is evenly provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are used to clamp and engage the limited fire extinguishing agent storage ball (30); A fixing plate (21) is provided at a middle position inside the elastic protective layer (20), and a through hole (23) for the thorn (22) to pass through is provided in the fixing plate (21).

2. The metallized film capacitor with a flame retardant structure according to claim 1, characterized in that: The protective member (40) includes a protective rod (41), an arc-shaped fixing rod (42) and a positioning bolt (43). Both ends of the arc-shaped fixing rod (42) are fixed to the capacitor body (10) by the positioning bolts (43). A plurality of protective rods (41) are evenly fixed on the side wall of the arc-shaped fixing rod (42). The protective rod (41) is vertically fixed to the arc-shaped fixing rod (42). The arc-shaped side of the arc-shaped fixing rod (42) protrudes outside the fire extinguishing agent storage ball (30).

3. The method for preparing a metallized film capacitor with a flame retardant structure according to claim 1, wherein: The following steps are involved: S1. Installation of the thorn (22): Evenly adhere the thorn (22) to the outer wall of the capacitor body (10) by glue, and the length of the thorn is selected to be less than the thickness of the elastic protective layer (20); S2, wrapping the spur (22): covering the capacitor body (10) with the elastic protective layer (20) and wrapping the spur (22); S3, fire extinguishing agent storage ball (30) installation: the fire extinguishing agent storage ball (30) is first filled with fire extinguishing agent at high pressure, the fire extinguishing agent storage ball (30) is evenly fixed on the elastic protective layer (20), and the fire extinguishing agent storage ball (30) corresponds to the thorns (22) one by one; S4. The protective member (40) is defined as follows: the protective member (40) is fixed on the outer wall of the capacitor body (10), and the protective member (40) is located outside the fire extinguishing agent storage ball (30); S5. The protective member (40) is fixed as a whole: the protective members (40) on the multiple surfaces of the capacitor body (10) are bonded to each other, so that the multiple protective members (40) are connected as a whole.

4. The method for preparing a metallized film capacitor with a flame retardant structure according to claim 3, wherein: A fixing plate (21) is provided inside the elastic protective layer (20), and a through hole (23) is provided on the fixing plate (21) for passing through the thorn (22). The fixing plate (21) as a whole limits the position of the thorn (22).

5. The method for preparing a metallized film capacitor with a flame retardant structure according to claim 4, wherein: The fire extinguishing agent storage ball (30) is wrapped with a protective layer (50) on the outside, and the protective layer (50) is an integral structure.

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