Fuse

Abstract

The utility model belongs to the technical field of electronic devices, and particularly relates to a fuse which comprises a shell and a conductive part arranged on the shell. The heating element is arranged adjacent to the conductive part, the heating element is electrically connected to the first fusing element, and the first fusing element and the heating element are arranged in the shell; a blocking part is arranged in the shell, at least part of the heating piece abuts against the blocking part, a second fusing piece is arranged in a containing cavity defined by the blocking part and the shell, at least part of the conductive part is connected with the second fusing piece, and a concave part is arranged on the edge of the conductive part. According to the utility model, the protection response is fast, the circuit can be automatically cut off when the main circuit is short-circuited, and the circuit can be actively cut off by using external current, so that the effect of protecting the circuit is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of electronic device technology, and specifically relates to a fuse. Background Technology

[0002] With the development of the energy storage industry, the energy storage capacity of chemical batteries has become a bottleneck in energy storage development. To solve this problem, battery capacity is increasing, and platform voltage is being raised to reduce reactive power loss. However, this leads to many safety hazards, such as short circuits. If the power cannot be cut off in time when a circuit fault occurs, large-capacity, high-voltage batteries may cause huge property damage. Therefore, fuses are installed in the circuit. Traditional fuses disconnect when the fuse body senses temperature and reaches the melting point of the dielectric material (alloy, etc.). The circuit protection effect of this type of fuse has a lag.

[0003] Currently, single-circuit overheat fuses account for over 95% of the overheat fuse market. However, single-circuit overheat fuses have always suffered from slow response during protection, causing protected components to burn out due to rapid overheating before the fuse can provide protection. To address this, a two-circuit design—a main circuit and a control circuit—was designed for auxiliary rapid heating, significantly improving the slow response of the traditional single-circuit design. This effectively and quickly protects components from burnout, achieving true rapid protection. However, due to space limitations such as height on circuit boards, the fuse with the two-circuit design is relatively large. Therefore, further development and optimization are needed for its application in space-constrained electrical products. Furthermore, in auxiliary heating fuses, because the auxiliary heating zone and the temperature sensing zone are designed in the same space, the flux in the temperature sensing zone needs to be saturated. However, at high temperatures, the flux will vaporize and expand excessively, potentially causing an explosion.

[0004] Therefore, there is an urgent need to propose a new technical solution to address the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a fuse that addresses the shortcomings of existing technologies, thereby solving the problems of slow response and inability to be used in electrical products with limited space.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fuse, comprising:

[0008] Housing and conductive portion disposed on the housing;

[0009] A heating element and a conductive part are disposed adjacent to each other. The heating element is electrically connected to a first fuse. Both the first fuse and the heating element are disposed inside the housing.

[0010] The housing has an internal barrier portion, at least a portion of the heating element abuts against the barrier portion, a second fusible element is provided in the cavity formed by the barrier portion and the housing, at least a portion of the conductive portion is connected to the second fusible element, and a recess is provided on the edge of the conductive portion.

[0011] Preferably, at least two of the heating elements are disposed opposite each other inside the housing, and a heat transfer channel is provided between the two oppositely disposed heating elements, wherein the first fusible element is disposed in the heat transfer channel.

[0012] Preferably, the projected area of ​​the heating element along the height direction of the housing is not greater than the projected area of ​​the heating element along the width direction of the housing.

[0013] Preferably, at least two of the heating elements are disposed opposite each other on the side of the second fuse element, and all the heating elements are disposed within the cavity.

[0014] Preferably, the heating element is cylindrical, and the second fusible element is sleeved inside the heating element.

[0015] Preferably, the conductive part includes a first conductor and a second conductor connected to each other, the first conductor extending to the outside of the housing, the second conductor located inside the housing, and the second conductor having clamping teeth for holding the second fuse.

[0016] Preferably, the barrier includes a first partition and a plurality of second partitions respectively abutting against the first partition, the heating element abutting against the first partition, the first partition being disposed between the first fuse and the plurality of second partitions, the clamping teeth and the second fuse each having a plurality, and the plurality of clamping teeth having a clamping groove for clamping the second partition.

[0017] Preferably, the connection between the first conductor and the second conductor has a through hole, which corresponds to the interior of the housing.

[0018] Preferably, the side of the housing has a first positioning groove, and the first conductor is disposed in the first positioning groove.

[0019] Preferably, the side of the housing has a second positioning groove, and the end of the heating element has a lead wire, which is disposed in the second positioning groove.

[0020] Preferably, a cover is provided on one side of the housing, the surface of the cover has at least one through hole corresponding to the interior of the housing, and the side of the cover facing the interior of the housing has multiple protrusions.

[0021] Preferably, the interior of the housing is filled with a heat-conducting layer that encloses the heating element, the first fuse, and the second fuse.

[0022] The beneficial effects of this utility model are as follows: This utility model includes a housing and a conductive part disposed in the housing, and a heating element disposed adjacent to the conductive part. The heating element is electrically connected to a first fuse. Both the first fuse and the heating element are disposed inside the housing. The housing has a blocking part inside, and at least a portion of the heating element abuts against the blocking part. A second fuse is disposed in the cavity formed by the blocking part and the housing. At least a portion of the conductive part is in contact with the second fuse, and a recess is provided on the edge of the conductive part. In use, this utility model can monitor the working status of the circuit in real time. When an abnormally large current passes through the conductive part, the second fuse will melt, or when the circuit of the heating element receives an external current, it will heat up rapidly, causing the second fuse to melt. The two work together to protect the circuit. Furthermore, the blocking part separates the second fuses, avoiding mutual interference between the second fuses and ensuring the stable operation of the circuit. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0024] Figure 2 This is a schematic diagram of the circuit connection structure between the heating element and the first fuse element in Embodiment 2 of this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the heating element, the first fuse element, and the second fuse element in Embodiment 3 of this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of the heating element, the first fuse element, and the second fuse element in Embodiment 4 of this utility model.

[0027] Figure 5 This is a schematic diagram of the connection structure of the conductive part and the second fuse in Embodiment 5 of this utility model.

[0028] Figure 6 This is a schematic diagram of the overall structure of the cap of this utility model.

[0029] Figure 7 This is a schematic diagram of the overall structure of the shell of this utility model.

[0030] Wherein: 1-shell; 10-barrier part; 101-first partition; 102-second partition; 11-cavity; 12-first positioning groove; 13-second positioning groove; 2-conductive part; 20-recessed part; 21-first conductor; 22-second conductor; 23-clamping tooth; 24-clamping groove; 25-through hole; 3-heating element; 4-first fuse; 5-second fuse; 6-cap; 61-through hole; 62-protrusion; 7-wire; H-height of shell; W-width of shell. Detailed Implementation

[0031] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0032] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The following is in conjunction with the appendix Figures 1-7 The present invention will be further described in detail with reference to specific embodiments, but this is not intended to limit the present invention.

[0035] Example 1

[0036] like Figure 1As shown, this embodiment provides a fuse, including a housing 1 and a conductive part 2 disposed on the housing 1; a heating element 3 disposed adjacent to the conductive part 2, the heating element 3 being electrically connected to a first fuse 4, the first fuse 4 and the heating element 3 being disposed inside the housing 1; the housing 1 has a blocking part 10 inside, at least a portion of the heating element 3 abutting against the blocking part 10, a second fuse 5 being disposed in the cavity 11 formed by the blocking part 10 and the housing 1, at least a portion of the conductive part 2 being connected to the second fuse 5, and a recess 20 being disposed on the edge of the conductive part.

[0037] When the fuse is in operation, it can monitor the working status of the circuit in real time. When an abnormally large current passes through the conductive part 2, the second fuse 5 will melt. Alternatively, when the circuit of the heating element 3 receives an external current, it will heat up rapidly, causing the second fuse 5 to melt. The two work together to protect the circuit. Furthermore, the blocking part 10 separates the second fuses 5, avoiding mutual interference between them and ensuring the stable operation of the circuit.

[0038] Example 2

[0039] like Figure 2 As shown, unlike Embodiment 1, at least two heating elements 3 are disposed opposite each other inside the housing 1, and a heat transfer channel is formed between the two oppositely disposed heating elements 3. A first fuse 4 is disposed in the heat transfer channel. The heat transfer channel can quickly concentrate heat to the vicinity of the first fuse 4. After the second fuse 5 melts normally, the heating element 3 continues to heat up. After reaching the melting temperature of the first fuse 4, the first fuse 4 melts, disconnecting the current, and the entire circuit stops working. The heating element 3 can be a ceramic heating element or other heating elements with high heating efficiency.

[0040] In this embodiment, the projected area of ​​the heating element 3 along the height direction of the housing 1 is not greater than the projected area of ​​the heating element 3 along the width direction of the housing 1. The heating element 3 is generally sheet-shaped and is placed vertically and tightly against one side of the conductive part. This design allows the heat inside the heating element 3 to dissipate quickly and increases the contact area between the heating element 3 and the conductive part 2, enabling rapid heat conduction to the conductive part 2 and shortening the melting time of the second fuse 5.

[0041] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0042] Example 3

[0043] like Figure 3 As shown, unlike Embodiment 1, at least two heating elements 3 are disposed opposite each other on the side of the second fuse 5, and all heating elements 3 are disposed within the cavity 11. Distributing the heating elements 3 near the second fuse 5 allows heat to be quickly conducted to the second fuse 5, thus accelerating the fusing efficiency.

[0044] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0045] Example 4

[0046] like Figure 4 As shown, unlike Embodiment 1, the heating element 3 is cylindrical, and the second fusing element 5 is sleeved inside the heating element 3. This increases the contact area between the heating element 3 and the second fusing element 5, allowing more heat to be conducted to the second fusing element 5 and accelerating the fusing efficiency.

[0047] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0048] Example 5

[0049] like Figures 5-7 As shown, unlike Embodiment 1, the conductive part 2 includes a first conductor 21 and a second conductor 22 connected together. The first conductor 21 extends to the outside of the housing 1, and the second conductor 22 is located inside the housing 1. The second conductor 22 has clamping teeth 23 for holding the second fuse 5. One end of the first conductor 21 is perpendicularly connected to one end of the second conductor 22, allowing the second conductor 22 to fit more closely to the housing 1 and also allowing the heating element 3 to be arranged parallel to the second conductor 22, thus accelerating the efficiency of heat transfer. The clamping teeth 23 serve to fix the second fuse 5. When the circuit is working normally, it can conduct current, and when melting is required, it transfers heat to the second fuse 5 to disconnect the circuit in time. The lateral diameter of the end of the second conductor 22 closest to the first conductor 21 is smaller than the lateral diameter of the other end. On the one hand, this reduces the amount of material used in the conductive part 2, and on the other hand, it allows for the connection of more second fuses 5, enhancing the conductivity of the fuse.

[0050] In this embodiment, the barrier 10 includes a first partition 101 and a plurality of second partitions 102 respectively abutting against the first partition 101. The heating element 3 abuts against the first partition 101. The first partition 101 is disposed between the first fuse element 4 and the plurality of second partitions 102. The clamping teeth 23 and the second fuse element 5 each have a plurality of clamping teeth 23. The plurality of clamping teeth 23 have clamping grooves 24 for clamping the second partitions 102. The first partition 101 separates the heating element 3 and the second fuse element 5, avoiding mutual interference between them. The second partition 102 and the first partition 101 cooperate to provide the second fuse element 5 with an independent space, allowing it to fuse normally without interference from adjacent fuse elements 5. The first partition 101 can be a ceramic cover or other hard material with good thermal conductivity. The clamping groove 24 cooperates with the second partition 102 to prevent the conductive part 2 from shifting laterally, allowing it to be fixed in the housing 1 and enhancing the overall stability of the fuse. The second fuse element 5 can be a fusible alloy. After the end of the second fuse element 5 is dipped in flux, it is melted and welded to the clamping teeth 23 using current welding or laser welding.

[0051] In this embodiment, the connection between the first conductor 21 and the second conductor 22 has a through hole 25, which corresponds to the interior of the housing 1. A heat-conducting layer can be injected into the interior of the housing 1 through the through hole, thereby improving production efficiency.

[0052] In this embodiment, the side of the housing 1 has a first positioning groove 12, and the first conductor 21 is disposed in the first positioning groove 12. The first positioning groove 12 can fix the first conductor 21 and prevent the first conductor 21 from shifting, causing the second fuse 5 to loosen.

[0053] In this embodiment, the side of the housing 1 has a second positioning groove 13, and the end of the heating element 3 has a lead wire 7, which is disposed in the second positioning groove 13. The second positioning groove 13 fixes the lead wire 7 in a designated position for easy location by the user.

[0054] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0055] Example 5

[0056] Unlike Embodiment 1, the interior of the housing 1 is filled with a heat-conducting layer that encloses the heating element 3, the first fuse 4, and the second fuse 5. This heat-conducting layer accelerates heat transfer, enhances the fusing efficiency of the first fuse 4 and the second fuse 5, and shortens the fusing time. Furthermore, when the second fuse 5 fuses, the heat-conducting layer penetrates into the fusing gap, providing insulation and further strengthening the fusing effect. The heat-conducting layer can be epoxy resin or other insulating materials with good thermal conductivity.

[0057] In this embodiment, a cover 6 is provided on one side of the housing 1. The surface of the cover 6 has at least one through hole 61 corresponding to the interior of the housing 1. The side of the cover 6 facing the interior of the housing 1 has multiple protrusions 62. The cover 6 and the housing 1 are fitted together to form a sealed container. The through hole 61 can play a role in venting during the injection of the heat-conducting layer in the production of the fuse. Secondly, when the cover 6 is installed, the heat-conducting layer can be added to the fuse through the through hole 61. The protrusions 62 in the middle of the cover 6 can effectively increase the adhesion between the cover 6 and the heat-conducting layer. The protrusions 62 at the four corners of the cover can effectively increase the bonding force between the housing 1 and the corners of the cover 6. The mutual cooperation between the protrusions 62 makes the connection between the cover 6 and the housing 1 more firm, increasing the overall stability of the fuse.

[0058] The other structures in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0059] Obviously, this utility model can solve the problems of slow response and inability to be used in electrical products with limited space in existing fuses. During use, the working status of the circuit can be monitored in real time. When an abnormally large current passes through the conductive part, the second fuse will melt, or when the circuit of the heating element receives an external current, it will heat up rapidly, causing the second fuse to melt. The two work together to protect the circuit.

[0060] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A fuse, characterized in that, include: The housing (1) and the conductive part (2) disposed on the housing (1); A heating element (3) is provided adjacent to the conductive part (2). The heating element (3) is electrically connected to a first fuse (4). Both the first fuse (4) and the heating element (3) are provided inside the housing (1). The interior of the housing (1) has a barrier (10), at least a portion of the heating element (3) abuts against the barrier (10), a second fuse (5) is provided in the cavity (11) formed by the barrier (10) and the housing (1), at least a portion of the conductive part (2) is connected to the second fuse (5), and a recess (20) is provided on the edge of the conductive part (2).

2. The fuse as described in claim 1, characterized in that: At least two of the heating elements (3) are disposed opposite to each other inside the housing (1), and a heat transfer channel is provided between the two heating elements (3) disposed opposite to each other, and the first fuse (4) is disposed in the heat transfer channel.

3. The fuse as described in claim 2, characterized in that: The projected area of ​​the heating element (3) along the height direction of the housing (1) is not greater than the projected area of ​​the heating element (3) along the width direction of the housing (1).

4. The fuse as described in claim 1, characterized in that: At least two of the heating elements (3) are disposed opposite to each other on the side of the second fuse (5), and the heating elements (3) are all disposed in the cavity (11).

5. The fuse as described in claim 1, characterized in that: The heating element (3) is cylindrical, and the second fuse (5) is sleeved inside the heating element (3).

6. The fuse as described in claim 1 or 2, characterized in that: The conductive part (2) includes a first conductor (21) and a second conductor (22) connected to each other. The first conductor (21) extends to the outside of the housing (1), and the second conductor (22) is located inside the housing (1). The second conductor (22) has clamping teeth (23) for clamping the second fuse (5).

7. The fuse as described in claim 6, characterized in that: The barrier (10) includes a first partition (101) and a plurality of second partitions (102) respectively abutting against the first partition (101). The heating element (3) abuts against the first partition (101). The first partition (101) is disposed between the first fuse (4) and the plurality of second partitions (102). The clamping teeth (23) and the second fuse (5) each have a plurality of clamping teeth (23). The plurality of clamping teeth (23) have clamping grooves (24) for clamping the second partitions (102).

8. The fuse as claimed in claim 6, characterized in that: The connection between the first conductor (21) and the second conductor (22) has a through hole (25), which corresponds to the interior of the housing (1).

9. The fuse as claimed in claim 6, characterized in that: The side of the housing (1) has a first positioning groove (12) and a second positioning groove (13), the first conductor (21) is disposed in the first positioning groove (12), and the end of the heating element (3) has a lead wire (7), which is disposed in the second positioning groove (13).

10. The fuse as claimed in claim 1 or 2, characterized in that: A cover (6) is provided on one side of the housing (1). The surface of the cover (6) has at least one through hole (61) corresponding to the interior of the housing (1). The side of the cover (6) facing the interior of the housing (1) has a plurality of protrusions (62).

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