A solid-state prefabricated arc extinguishing module

Abstract

The present invention discloses a solid-state prefabricated arc extinguishing module, which includes a melt, at least one set of arc extinguishing components, and a housing for encapsulating the arc extinguishing components; the melt, the arc extinguishing components, and the housing are sequentially and adhesively encapsulated from the inside to the outside; each set of arc extinguishing components is coaxially and adhesively sleeved from the inside to the outside in sequence; each set of the arc extinguishing components is respectively composed of at least two arc extinguishing parts, and the arc extinguishing parts within each set are mutually joined; the melt is arranged in the gap formed by the joining of the arc extinguishing parts, and both ends of the melt are located outside the arc extinguishing components and are used for connecting external circuits, wherein the arc extinguishing parts are formed by curing arc extinguishing sand. The present invention adopts arc extinguishing parts prefabricated and cured with arc extinguishing sand. When in use, it is combined with the melt. More than two pieces are pressed tightly, and then wrapped and fixed with a thin film shell or a paper shell, so that the melt is easy to position during assembly, not easily damaged, the assembly is simple, the relative weight is lighter, the volume is smaller, and the arc extinguishing consistency is high.

Description

Technical Field

[0001] The present invention relates to the field of fuses, and particularly to a solid prefabricated arc extinguishing module. Background Art

[0002] Currently, thermal fuses are commonly used as circuit protection devices in electric vehicle battery packs. As Figure 1 shown, the structure of a thermal fuse includes a contact blade, a cover plate, a fuse element, arc extinguishing sand, a porcelain tube, a sealing cap, etc. The fuse element of most thermal fuses is arranged in a bent shape inside the porcelain tube. The working principle of a thermal fuse is as follows: when the current in the circuit exceeds the specified value, that is, when a fault current appears, the circuit current passes through the fuse element via the contact blade. Utilizing the current heat accumulation effect, the current sensing point (neck) of the fuse element melts and breaks within a certain time to extinguish the arc, thereby safely interrupting the fault current.

[0003] Currently, there are some deficiencies in the production and use of traditional fuses. For example, the bent fuse element of the fuse is not easy to position during assembly, and it is prone to excessive self - folding or being damaged by force; traditional fuses mostly use porcelain tubes as the fuse housing, which are heavy in weight and large in volume; traditional fuses mostly use quartz sand as the arc extinguishing material. During the production process, the quartz sand is filled into the space around the fuse element through a sand vibrating process, and it is very easy to have the problem of uneven sand vibration, which greatly affects the arc extinguishing performance and the arc extinguishing consistency is not high. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems existing in the above - mentioned prior art, and provide a solid prefabricated arc extinguishing module. The arc extinguishing parts are prefabricated and solidified with arc extinguishing sand. When in use, they are combined with the fuse element. Two or more of them are pressed tightly, and then wrapped and fixed with a thin film shell or a paper shell, so that the fuse element is easy to position during assembly, not easy to be damaged, the assembly is simple, the relative weight is lighter, the volume is smaller, and the arc extinguishing consistency is high.

[0005] To this end, the present invention provides a solid prefabricated arc extinguishing module, including a fuse element, at least one set of arc extinguishing components, and a housing for encapsulating the arc extinguishing components; the fuse element, the arc extinguishing components, and the housing are sequentially and adhesively encapsulated from the inside to the outside; each group of arc extinguishing components is sequentially and coaxially sleeved and adhered from the inside to the outside; each group of the arc extinguishing components is respectively composed of at least two arc extinguishing parts, and the arc extinguishing parts within each group are mutually pieced together; the fuse element passes through the gap formed by the fitting and splicing of the arc extinguishing parts, and both ends of the fuse element are located outside the arc extinguishing components and are used for connecting an external circuit.

[0006] Further, the arc extinguishing part is formed by solidifying arc extinguishing sand.

[0007] Furthermore, the arc extinguishing sand is one or a mixture of at least two of quartz sand, aluminum oxide sand, ceramic particles, or glass powder.

[0008] Further, there is at least one set of the arc extinguishing components. The arc extinguishing component located in the innermost layer is a solid structure, and the remaining arc extinguishing components are all hollow structures. The surfaces where two adjacent sets of arc extinguishing components are fitted and sleeved correspond to each other.

[0009] Furthermore, the arc extinguishing component with a solid structure is a columnar structure, and the columnar structure includes a cylindrical structure, a triangular prism structure, a quadrangular prism structure, or a polygonal prism structure.

[0010] Furthermore, the inner surface of the shape of the arc extinguishing component with a hollow structure corresponds to the outer surface of the shape of the arc extinguishing component with a solid structure.

[0011] Furthermore, when the arc extinguishing component with a solid structure is formed by splicing two arc extinguishing parts, the splicing surfaces of the two spliced arc extinguishing parts correspond to each other in a concave-convex manner; the cross-sectional shapes of the two arc extinguishing parts are L-shaped, E-shaped, F-shaped, or U-shaped.

[0012] Furthermore, in the arc extinguishing component with a solid structure, one of the arc extinguishing parts is provided with a groove on its splicing surface, and the other arc extinguishing part is provided with a protrusion on its splicing surface that matches the groove.

[0013] Further, the shape of the slit corresponds to the shape of the melt located inside the arc extinguishing component.

[0014] Further, the melt located inside the arc extinguishing component is bent along its length direction. The melt has at least one bent portion, and at least one narrow neck portion is provided on at least one side of at least one bent portion of the melt. The narrow neck portion is located inside the arc extinguishing component.

[0015] Further, at least one of the melts is arranged inside the arc extinguishing component in the innermost layer.

[0016] Further, the outer shell is a thin film shell or a paper shell.

[0017] Further, the slits in each set of arc extinguishing components are distributed in a staggered manner with the slits in the adjacent arc extinguishing components.

[0018] A solid prefabricated arc extinguishing module provided by the present invention has the following beneficial effects:

[0019] 1. Simplify the process, and directly assemble the arc extinguishing parts;

[0020] 2. The arc extinguishing parts can position the bent shape of the melt sheet, avoiding breakdown or short circuit caused by excessive self-folding of the melt sheet and insufficient insulation distance, and also avoiding damage to the melt due to force;

[0021] 3. The arc extinguishing parts are in full contact with the melt, improving the arc extinguishing reliability and the arc extinguishing consistency;

[0022] 4. It can be made into lightweight products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 6 is a schematic structural diagram of an existing thermal fuse;

[0024] Figure 2 FIG. 10 is an exploded structural diagram of Example 1;

[0025] Figure 3 FIG. 14 is a schematic structural diagram of Example 1 after assembly;

[0026] Figure 4 FIG. 18 is an exploded structural diagram of Example 2;

[0027] Figure 5 FIG. 22 is a schematic structural diagram of Example 2 after assembly.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS:

[0029] 101 - First outer shell; 102 - First arc extinguishing part; 103 - First fuse element; 104 - Second arc extinguishing part; 201 - Second outer shell; 202 - Third arc extinguishing part; 203 - Second fuse element; 204 - Third fuse element; 205 - Fourth arc extinguishing part; 206 - Fifth arc extinguishing part; 207 - Sixth arc extinguishing part; 208 - Seventh arc extinguishing part; 209 - Eighth arc extinguishing part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following describes in detail multiple specific embodiments of the present invention with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0031] Specifically, an embodiment of the present invention provides a solid - state prefabricated arc extinguishing module, including a fuse element, at least one set of arc extinguishing components, and an outer shell for encapsulating the arc extinguishing components; the fuse element, the arc extinguishing components, and the outer shell are sequentially and adhesively encapsulated from the inside to the outside; each set of arc extinguishing components is coaxially and adhesively sleeved from the inside to the outside in sequence; each set of the arc extinguishing components is respectively composed of at least two arc extinguishing parts, and the arc extinguishing parts within each set are mutually joined; the fuse element is arranged in the gap formed by the joining of the arc extinguishing parts, and both ends of the fuse element are located outside the arc extinguishing components and are used to connect an external circuit.

[0032] In the present invention, the arc extinguishing parts are formed by curing arc extinguishing sand, and the arc extinguishing sand is one or a mixture of at least two of quartz sand, aluminum oxide sand, ceramic particles, or glass powder. The outer shell is a thin - film shell or a paper shell.

[0033] Two specific embodiments (embodiment 1 and embodiment 2) are used below to introduce in detail a solid prefabricated arc extinguishing module of the present invention. Prior to this, we first understand the shape of the arc extinguishing assembly of the present invention and the specific splicing method.

[0034] Regarding the shape of the arc extinguishing assembly of the present invention, the arc extinguishing assembly located in the innermost layer is a solid structure, and the remaining arc extinguishing assemblies are all hollow structures, and the surfaces of the two adjacent groups of arc extinguishing assemblies that fit and sleeve correspond to each other. The arc extinguishing assembly with a solid structure is a columnar structure, and the columnar structure includes a cylindrical structure (Example 2), a triangular prism structure, a quadrangular prism structure (Example 1) or a multi-prism structure. In the present invention, the arc extinguishing assembly with a solid structure located in the innermost layer is a necessary condition for arc extinguishing, and the arc extinguishing assembly with a hollow structure on its periphery is to enhance the arc extinguishing effect. The shape of the arc extinguishing assembly with a hollow structure corresponds to the shape of the arc extinguishing assembly with a solid structure, that is, the inner surface of the arc extinguishing assembly on the outer side is completely consistent with the outer surface shape of the adjacent inner arc extinguishing assembly, as long as it can be sleeved on the arc extinguishing assembly inside it. The arc extinguishing assembly with a solid structure is composed of two arc extinguishing parts, and the concave and convex surfaces of the two arc extinguishing parts correspond to each other; the cross-sectional shape of the two arc extinguishing parts is L-shaped, E-shaped, F-shaped or U-shaped. In the arc extinguishing assembly of a solid structure, one of the arc extinguishing parts is provided with a groove on its spliced ​​surface, and the other arc extinguishing part is provided with a protrusion matching the groove on its spliced ​​surface.

[0035] For the splicing method of the present invention, the shape of the slit corresponds to the shape of the melt located inside the arc extinguishing assembly. The slits in each group of arc extinguishing assemblies are staggered with the slits in the adjacent arc extinguishing assemblies. At least one of the melts is inserted into the innermost arc extinguishing assembly. The melt located inside the arc extinguishing assembly is bent along its length, and the melt has at least one bend. At least one narrow neck is provided on at least one side of at least one bend in the melt, and the narrow neck is located inside the arc extinguishing assembly.

[0036] Example 1

[0037] In this embodiment, the arc extinguishing assembly is a quadrangular prism. Specifically, the arc extinguishing assembly is a group, and the arc extinguishing assembly includes two L-shaped arc extinguishing parts, wherein the two L-shaped arc extinguishing parts are symmetrically arranged. The shape of the joint surface of the two L-shaped arc extinguishing parts corresponds to the shape of the melt.

[0038] In this embodiment, one fuse (first fuse) and two arc-extinguishing parts (first arc-extinguishing part 102 and second arc-extinguishing part 104) are used to assemble and manufacture the product.

[0039] This embodiment provides a solid prefabricated arc extinguishing module, seeFigure 2 and Figure 3 。

[0040] The solid-state prefabricated arc extinguishing module of this embodiment is composed of a first housing 101, a first arc extinguishing part 102, a first fuse 103, a second arc extinguishing part 104, etc.

[0041] The first arc extinguishing part 102 and the second arc extinguishing part 104 are structures prefabricated and solidified with arc extinguishing substances such as arc extinguishing sand. The shape of the arc extinguishing part where the fuse is assembled can be set to match the bending shape of the fuse, so as to facilitate the support and positioning of the fuse, and the fuse is pressed tightly in the arc extinguishing part, making arc extinguishing more reliable.

[0042] The first arc extinguishing part 102 and the second arc extinguishing part 104 are two L-shaped cross-section structures that cooperate with each other.

[0043] The first fuse 103 is generally in a bent shape, and at least one narrow neck is provided on one side or both sides of the first fuse at the bent part.

[0044] The first housing 101 cooperates and fixes the two arc extinguishing parts (the first arc extinguishing part 102 and the second arc extinguishing part 104). After the arc extinguishing parts and the fuse are assembled, the housing is assembled on the outer wall surface of the arc extinguishing parts. The housing can be a thin film shell or a paper shell, which is used to wrap the arc extinguishing component to ensure the integrity of the arc extinguishing module.

[0045] Embodiment 2

[0046] In this embodiment, there are a total of three groups of arc extinguishing components. The innermost arc extinguishing component is a cylinder, and the other two groups of arc extinguishing components are both cylindrical bodies, and each group of arc extinguishing components is coaxially encapsulated and arranged from inside to outside in sequence; each group of the arc extinguishing components includes two of the arc extinguishing parts. The connection line at the splicing place in each group of arc extinguishing components forms a 90-degree angle with the connection line at the splicing place in the adjacent arc extinguishing component. The number of the fuses is two, which are wrapped in the innermost arc extinguishing component; except for the innermost arc extinguishing parts, they are all semi-cylindrical. The innermost arc extinguishing parts are all semi-cylindrical; one of the innermost arc extinguishing parts is provided with a groove on the splicing surface, and the other innermost arc extinguishing part is provided with a protrusion matching the groove on the corresponding splicing surface; the shapes of the surfaces where the groove and the protrusion contact respectively correspond to the shape of the fuse.

[0047] In this embodiment, two fuses (the second fuse 203 and the third fuse 204) and six arc extinguishing parts (the third arc extinguishing part 202, the fourth arc extinguishing part 205, the fifth arc extinguishing part 206, the sixth arc extinguishing part 207, the seventh arc extinguishing part 208, and the eighth arc extinguishing part 209) are used for the assembly and production of the product.

[0048] A solid-state prefabricated arc extinguishing module provided by this embodiment, see Figure 4 、Figure 5 。

[0049] The solid-state prefabricated arc extinguishing module of this embodiment is composed of a second housing 201, a third arc extinguishing part 202, a second fuse 203, a third fuse 204, a fourth arc extinguishing part 205, a fifth arc extinguishing part 206, a sixth arc extinguishing part 207, a seventh arc extinguishing part 208, an eighth arc extinguishing part 209, etc.

[0050] The third arc extinguishing part 202, the fourth arc extinguishing part 205, the fifth arc extinguishing part 206, the sixth arc extinguishing part 207, the seventh arc extinguishing part 208, and the eighth arc extinguishing part 209 are structures prefabricated and solidified with arc extinguishing substances such as sand. The third arc extinguishing part 202 and the fourth arc extinguishing part 205 cooperate to assemble the fuse, and they are arc extinguishing parts in direct contact with the fuse. The shape of the cooperation between the third arc extinguishing part 202 and the fourth arc extinguishing part 205 for assembling the fuse can be set to match the bending shape of the fuse, so as to facilitate the support and positioning of the fuse, and the fuse is pressed tightly in the arc extinguishing part, making arc extinguishing more reliable.

[0051] The outer perimeters of the third arc extinguishing part 202 and the fourth arc extinguishing part 205 combine to form a complete cylindrical structure, and two fuses are assembled inside in cooperation; the fifth arc extinguishing part 206 and the sixth arc extinguishing part 207 are assembled on the outer peripheral walls of the third arc extinguishing part 202 and the fourth arc extinguishing part 205. The cross-sections of the fifth arc extinguishing part 206 and the sixth arc extinguishing part 207 are semi-circular rings, and when assembled, they are arranged in a certain angular misalignment at the joint gap where the third arc extinguishing part 202 and the fourth arc extinguishing part 205 assemble the fuse; the seventh arc extinguishing part 208 and the eighth arc extinguishing part 209 are assembled on the outer peripheral walls of the fifth arc extinguishing part 206 and the sixth arc extinguishing part 207. The cross-sections of the seventh arc extinguishing part 208 and the eighth arc extinguishing part 209 are semi-circular rings, and when assembled, they are arranged in a certain angular misalignment at the joint gap with the fifth arc extinguishing part 206 and the sixth arc extinguishing part 207. In this way, the gaps are staggered layer by layer, which can minimize the air gap as much as possible and is beneficial to arc extinguishing.

[0052] The fifth arc extinguishing part 206 and the sixth arc extinguishing part 207 can be set to the same structure, with a step fit provided at the semi-circular end, which can further achieve sealing, or a flat end face can be directly set. The fifth arc extinguishing part 206 and the sixth arc extinguishing part 207 can also be set to different structures, such as being set to a large-section ring and a small-section ring cross-section structure respectively. The same applies to the seventh arc extinguishing part 208 and the eighth arc extinguishing part 209.

[0053] The second fuse 203 and the third fuse 204 are generally in a bent shape.

[0054] The second housing 201 fits and fixes the arc extinguishing parts. After assembling the arc extinguishing parts and the fuses, the housing is assembled on the outer wall surface of the arc extinguishing parts. The housing can be a thin film shell or a paper shell.

[0055] The above are only several specific embodiments of the present invention disclosed. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A solid-state prefabricated arc extinguishing module, characterized in that, It includes a melt, at least one set of arc extinguishing components, and a housing for encapsulating the arc extinguishing components; The melt, the arc extinguishing components, and the housing are sequentially and conformally encapsulated from the inside to the outside; each set of arc extinguishing components is sequentially and coaxially and conformally sleeved from the inside to the outside; Each set of the arc extinguishing components is respectively composed of at least two arc extinguishing parts, and the arc extinguishing parts within each set are mutually joined; The melt is disposed in the gap formed by the joining of the arc extinguishing parts, and both ends of the melt are respectively located outside the arc extinguishing components and are used for connecting external circuits; The arc extinguishing parts are formed by curing arc extinguishing sand; The shape of the gap corresponds to the shape of the melt located inside the arc extinguishing components; The melt located inside the arc extinguishing components is bent along its length direction, the melt has at least one bent portion, at least one narrow neck is provided on at least one side of at least one bent portion of the melt, and the narrow neck is located inside the arc extinguishing components.

2. The solid-state prefabricated arc extinguishing module according to claim 1, wherein The arc extinguishing sand is one or a mixture of at least two of quartz sand, aluminum oxide sand, ceramic particles, or glass powder.

3. The solid-state prefabricated arc extinguishing module according to claim 1, wherein There is at least one set of the arc extinguishing components. The arc extinguishing component located in the innermost layer is of a solid structure, and the remaining arc extinguishing components are of hollow structures. The surfaces where adjacent two sets of arc extinguishing components are conformally sleeved correspond to each other.

4. The solid-state prefabricated arc extinguishing module according to claim 3, wherein The arc extinguishing component of the solid structure is of a columnar structure, and the columnar structure includes a cylindrical structure, a triangular prism structure, a quadrangular prism structure, or a polygonal prism structure.

5. The solid-state prefabricated arc extinguishing module according to claim 4, wherein The shape of the inner surface of the arc extinguishing component of the hollow structure corresponds to the shape of the outer surface of the arc extinguishing component of the solid structure.

6. The solid-state prefabricated arc extinguishing module according to claim 4, wherein, When the arc extinguishing component of the solid structure is formed by joining two arc extinguishing parts, the joining surfaces of the two joined arc extinguishing parts are concavo-convex corresponding; the cross-sectional shapes of the two arc extinguishing parts are L-shaped, E-shaped, F-shaped, or U-shaped.

7. The solid-state prefabricated arc extinguishing module according to claim 6, wherein In the arc extinguishing component of the solid structure, one of the arc extinguishing parts is provided with a groove on its joining surface, and the other arc extinguishing part is provided with a protrusion matching the groove on its joining surface.

8. The solid-state prefabricated arc extinguishing module according to claim 1, wherein, At least one melt is disposed in the arc extinguishing component located in the innermost layer.

9. The solid-state prefabricated arc extinguishing module according to claim 1, characterized in that The housing is a thin film shell or a paper shell.

10. The solid-state prefabricated arc extinguishing module according to claim 1, wherein, The gaps in each set of arc extinguishing components are distributed in a staggered manner with the gaps in its adjacent arc extinguishing components.

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