CN220873517U - Fuse structure and bus bar for vehicle - Google Patents

Abstract

The utility model discloses a fuse structure and a bus bar for a vehicle. The fuse structure comprises a first fuse and at least one second fuse, wherein only one end of any second fuse is connected with the first fuse, and one connected end is implemented as a first end, and the other unconnected end is implemented as a second end; the first fuse and the second fuse all include the copper wire between locating first tip and the second tip, and the copper wire includes at least one first copper wire and two at least second copper wires, and first copper wire and second copper wire set up in turn, and the one end that keeps away from its corresponding first copper wire of second copper wire at both ends is connected with first tip, second tip respectively, and the second copper wire is implemented as fusing portion and is thinner than first copper wire. The length of the second copper wire of the fusible part is shorter, the control of the overall dimension is easier and is not easy to deform, the phenomenon of swing of the fuse can not occur when the fuse is fused, the timeliness of the fuse fusing is not influenced, and the fusing performance is more stable. The first copper wire plays a role in heat dissipation during normal use.

Description

Fuse structure and bus bar for vehicle

Technical Field

The utility model relates to the technical field of fuse structures, in particular to a fuse structure and a bus bar for a vehicle.

Background

A fuse is also called a fuse, and is defined as a "fuse link" in international standards, and is an electrical component connected in series in a circuit, and when a fault current increases to a certain value, the fuse can automatically blow to cut off the circuit, so that other devices in the circuit are protected, and the safe operation of the circuit is ensured. The fuse has the following advantages: when the current fluctuates due to power supply or external interference, a certain range of overload can be born; when a large overload current exists in the circuit, the fuse should cut off the overload current within a specified time to protect the safety of other electronic elements in the circuit; when the circuit is short-circuited and high current is generated, the fuse can safely cut off the circuit and prevent the circuit from being damaged by overcurrent. As shown in fig. 1, a conventional fuse structure, specifically, the fuse includes a length of elongated copper wire 10' with connection pads at both ends. Such a fuse, while also having the advantages described above, has the following drawbacks: because the copper wire of the fuse is thin and long, the thickness is generally between 0.08 and 0.15mm, the overall dimension is unstable in the manufacturing process in the processing process, the control difficulty is high, deformation is easy to occur, the fuse is unstable to fuse, and the product performance is influenced; the fuse is separated from the circuit board in the fusing process, and the copper wire swings due to the fact that the copper wire is thin and long, so that the fusing timeliness is affected; in addition, when the fuse is melted, the fuse needs to be replaced by a new fuse or even the whole busbar, so that the use cost is high. Accordingly, the present utility model has been made to solve the above-mentioned problems.

Disclosure of utility model

In view of at least one of the above problems, an object of the present utility model is to provide a fuse structure and a bus bar for a vehicle.

The technical scheme of the utility model is as follows:

an object of the present utility model is to provide a fuse structure, including a first fuse and at least one second fuse, wherein only one end of any one second fuse is connected to the first fuse, such that one end of the first fuse connected to the second fuse is implemented as a first end and the other end of the second fuse disconnected from the first fuse is implemented as a second end; the first fuse and the second fuse all include the copper wire of locating between first tip and the second tip, the copper wire includes at least one first copper wire and two at least second copper wires, first copper wire and second copper wire set up in turn, are located two at both ends the one end of keeping away from its corresponding first copper wire of second copper wire respectively with first tip, second end connection, the second copper wire is implemented as fusing portion and is than first copper wire is thin.

Another object of the present utility model is to provide a fuse structure, including a first fuse, where the first fuse includes a middle copper wire and connection pads at two ends, the copper wire includes at least one first copper wire and at least two second copper wires, the first copper wire and the second copper wires are alternately arranged, one ends, far away from the first copper wire, of the two second copper wires at two ends are respectively connected to the connection pads at two ends, and the second copper wires are implemented as fusing parts and are thinner than the first copper wires.

Still another object of the present utility model is to provide a bus bar for a vehicle, including the above fuse structure.

Compared with the prior art, the utility model has the advantages that:

According to the fuse structure, the length of the second copper wire of the fusible part is shorter, the control of the external dimension is easier, the shape is not easy to deform, the phenomenon of swinging of the fuse can not occur during fusing, the timeliness of fusing of the fuse can not be influenced, and the fusing performance is more stable. The first copper wire plays a role in heat dissipation during normal use.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic diagram of a fuse structure according to the present utility model before modification;

FIG. 2 is a schematic diagram of a fuse structure according to embodiment 1 of the present utility model;

Fig. 3 is a schematic structural diagram of a fuse structure according to embodiment 2 of the present utility model.

Wherein: 10. a first fuse; 11. a first copper wire; 12. a second copper wire; 13. a connection part; 20. a second fuse; 30. a first bonding pad; 40. a second bonding pad; 50. and a third pad.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Example 1

An embodiment of the present utility model provides a fuse structure, see fig. 2, comprising a first fuse 10 and at least one second fuse 20. The first fuse 10 serves as a main fuse and the second fuse 20 serves as a spare fuse. The first fuse 10 and the second fuse 20 each include a copper wire in the middle and end portions at both ends, i.e., connection pads, and one of the end portions at both ends, i.e., the right end as shown in fig. 2, to which the first fuse 10 and the second fuse 20 are connected is described as a first end portion, and the other end portion, i.e., the left end as shown in fig. 2, is described as a second end portion for convenience of description and distinction. The first fuse 10 and the second fuse 20 have identical copper wire structures, and each include at least one first copper wire 11 and at least two second copper wires 12, and the first copper wires 11 and the second copper wires 12 are alternately arranged. Preferably, in the embodiment of the present utility model, the number of the first copper wires 11 is one, and the number of the second copper wires 12 is two, that is, the copper wires include a middle first copper wire 11 and two end second copper wires 12 as shown in fig. 2 and 3, and the two second copper wires 12 are identical in structure and are implemented as fusible parts and thinner than the first copper wires 11. That is, the prior art, i.e., the entire elongated copper wire shown in fig. 1, is modified to be comprised of three sections of copper wire, wherein the middle section of copper wire is thicker and the two sections of copper wires at the two ends are thinner. It should be noted that, in the fuse structure according to the embodiment of the present utility model, since the length of the second copper wire 12 is smaller than the length of the whole copper wire 10 'in the prior art, in order to ensure the resistivity uniformity, the cross section of the second copper wire 12 needs to be smaller than the cross section of the copper wire 10' in the prior art, i.e. as shown in fig. 1, according to the resistivity formula. That is, compared with the prior art, the length of the second copper wire 12, which is the fusible copper wire, is shorter (not specifically described and limited) than the length of the copper wire 10' of the fuse in the embodiment of the utility model, the control of the external dimension is easier and the external dimension is not easy to deform, and the rear end of any second copper wire 12 is provided with a thicker first copper wire 11, so that the second copper wire 12 does not swing when being fused, the timeliness of fusing the fuse is not affected, and the fusing performance is more stable. The fuse solves the problems that in the prior art, the external dimension is difficult to control in the processing process generated by the fuse design of a whole slender copper wire, and the fusing performance is unstable due to swing when fusing. In the fuse structure provided by the embodiment of the utility model, during normal operation, the first copper wire 11 with wider width plays a certain role in heat dissipation; when the current reaches the fusing current, the fuse can be fused quickly in time when passing through the second copper wire 12 of the first section, and the flow of the current is interrupted quickly. Because the second fuse 20 adopting the same copper wire structural design is additionally arranged as a standby fuse, after the first fuse 10 serving as a main fuse is melted, the second fuse can be directly connected and used through a connecting pad on the second fuse 20, a new fuse is not required to be replaced, maintainability is improved, the whole busbar is not required to be replaced, and replacement time and cost are greatly reduced. In the embodiment of the present utility model, "width" refers to the pitch in the up-down direction as shown in fig. 2 to 3, and "length" refers to the pitch in the left-right direction as shown in fig. 2 to 3.

According to some preferred embodiments of the present utility model, as shown in fig. 2 to 3, the end of any one of the second copper wires 12 remote from the first copper wire 11 is further provided with a connecting portion 13 wider than the second copper wire 12 but thinner than the first copper wire 11. Through the design of this connecting portion 13, as the transition structure that second copper wire and pad are connected, can alleviate the direct action of external force to second copper wire 12 in the pad connection process, reduce the deformation of second copper wire 12 to improve the fusing stability of fuse. The specific width of the connecting portion 13 is not described and limited, and a person skilled in the art can select a design according to actual requirements.

According to some preferred embodiments of the present utility model, the copper wires of the first fuse 10 and the second fuse 20 are of an integral structure, that is, the second copper wires 12 at both ends and the first copper wire 11 in the middle are of an integral structure processed by the same copper sheet. The processing is more convenient, and the structural strength of the integrated structure is better.

According to some preferred embodiments of the present utility model, in order to achieve the mounting connection of the fuse, connection pads should be added to both ends of the fuse. Specifically, as shown in fig. 2 to 3, the first ends of the first fuse 10 and the second fuse 20 are connected to form one first pad 30 having a width greater than the sum of the widths of the two first copper wires 11 of the first fuse 10 and the second fuse 20, the second end of the first fuse 10 having a width greater than the width of the first copper wire 11 of the first fuse 10 and implemented as the second pad 40, and the second end of the second fuse 20 having a width greater than the width of the first copper wire 11 of the second fuse 20 and implemented as the third pad 50. That is, in the fuse structure of the embodiment of the present utility model, when in use, the first bonding pad 30 is connected with the second bonding pad 40 of the first fuse 10, and after the first fuse 10 is melted, the third bonding pad 50 of the second fuse 20 is directly connected, so that the first bonding pad 30 of the fuse does not need to be detached for replacement, thereby greatly reducing the replacement time and cost, being fast and convenient for maintenance, and improving the product life.

According to some preferred embodiments of the present utility model, as shown in fig. 2 to 3, the first pad 30 is T-shaped or L-shaped, the second pad 40 is T-shaped, and the third pad 50 is square. That is, the specific shapes of the first fuse 10 and the second fuse 20 are slightly different, so that the identification of the user can be facilitated.

The shape of the first copper wire 11 is not limited to the waist shape shown in fig. 2 and 3, and may be other shapes known to those skilled in the art, as long as the width of the first copper wire 11 is ensured to be wider than the width of the second copper wires 12 at both ends.

According to some alternative embodiments of the present utility model, the number of the second fuses 20 may be two or more, and the plurality of second fuses 20 are connected to the first fuse 10 through one end such as the right end as shown in fig. 1. Taking two second fuses 20 as an example, the first ends of the two second fuses 20 are directly connected and connected to the first ends of the first fuses 10 to form one large first pad 30. That is, the other end, i.e., the second end, of any second fuse 20 is not connected to the first fuse 10, and the second end of the second fuse 20 is connected to the circuit only when the second fuse 20 is required to be used. The use times of the whole fuse can be improved, and the service life is reduced.

Example 2

As shown in fig. 3, the fuse structure according to the embodiment of the present utility model is different from the fuse structure according to the embodiment 1 in that only one first fuse 10 is provided. Also, the number of the first copper wires 11 is at least one, the number of the second copper wires 12 is at least two, and the first copper wires 11 and the second copper wires 12 are alternately arranged. The connection pads at both ends of the first fuse 10 are described as the first pad 30 and the second pad 40, respectively, in embodiment 1, which will not be described in detail. In the fuse structure of the embodiment of the utility model, the copper wires are designed into the first copper wire 11 in the middle and the second copper wires 12 at the two ends, and the second copper wires 12 are thinner than the first copper wires 11, and the second copper wires 12 serve as fusible parts. The fuse designed by the utility model has the advantages that the control of the external dimension is easier in the processing process, and the fusing performance of the fuse is more stable. In normal use, the first copper wire 11 acts as a heat sink. Compared with embodiment 1, the fuse structure of the embodiment of the utility model has lower manufacturing cost, but when the fuse is used, the fuse needs to be replaced by a new fuse once the fuse is fused, so the use cost is higher.

Example 3

The embodiment of the utility model provides a bus bar for a vehicle, which comprises a fuse structure in embodiment 1 or embodiment 2. The fuse structure of the above embodiment has at least the beneficial effects of the above fuse structure, and is not described in detail. The bus bars for the vehicle in the embodiment of the utility model can be selected from the integrated bus bars and the laminated bus bars on the existing market. The specific manner of connection of the fuse to the bus bar for the vehicle is not described or limited, and is known and readily accomplished by those skilled in the art.

It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.

Claims (8)

1. A fuse structure comprising a first fuse and at least one second fuse, wherein only one end of any one of the second fuses is connected to the first fuse, such that one end of the first fuse connected to the second fuse is implemented as a first end and the other end not connected to the first fuse is implemented as a second end; the first fuse and the second fuse all include the copper wire of locating between first tip and the second tip, the copper wire includes at least one first copper wire and two at least second copper wires, first copper wire and second copper wire set up in turn, are located two at both ends the one end of keeping away from its corresponding first copper wire of second copper wire respectively with first tip, second end connection, the second copper wire is implemented as fusing portion and is than first copper wire is thin.

2. A fuse structure in accordance with claim 1, further comprising a connecting portion provided at an end of any one of said second copper wires remote from said first copper wire, said connecting portion being thicker than said second copper wire and thinner than said first copper wire.

3. A fuse structure according to claim 1 or claim 2, wherein the copper wires of the first and second fuses are of unitary construction.

4. A fuse structure according to claim 1 or 2, wherein the first ends are wider than the widths of the two first copper wires and are embodied as first pads, and the second ends of the first and second fuses are each wider than the widths of the respective first copper wires and are embodied as second and third pads, respectively.

5. The fuse structure of claim 4, wherein the first bonding pad is T-shaped or L-shaped, the second bonding pad is T-shaped, and the third bonding pad is square.

6. The utility model provides a fuse structure, its characterized in that includes first fuse, first fuse includes the connection pad at middle copper wire and both ends, the copper wire includes at least one first copper wire and two at least second copper wires, first copper wire and second copper wire set up in turn, are located two of both ends the second copper wire keep away from first copper wire's one end links to each other with the connection pad at both ends respectively, the second copper wire is implemented as fusing portion and is all than first copper wire is thin.

7. The fuse structure of claim 6, further comprising at least one second fuse disposed in parallel with the first fuse, the second fuse also comprising a middle copper wire and connection pads at both ends, the copper wire also comprising a middle first copper wire and second copper wires at both ends, both the second copper wires being implemented as fusing parts and being thinner than the first copper wires, the second fuse and one end of the first fuse being connected and sharing one connection pad, and the other end being provided with one connection pad, respectively.

8. A bus bar for a vehicle comprising the fuse structure of any one of claims 1-7.