CN212907627U

CN212907627U - Heavy current fuse device with variable cross section fuse-element

Info

Publication number: CN212907627U
Application number: CN202021651072.XU
Authority: CN
Inventors: 刘业军; 金宝
Original assignee: Anhui Canbang Electric Co ltd
Current assignee: Anhui Canbang Electric Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-04-06
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a heavy current fuse device with variable cross section fuse-element, include: the two variable cross-section melts are arranged in parallel; the melting tubes are respectively arranged at the upper opening and the lower opening of the outer ring of the two variable cross-section melts, the melting tubes are as high as the variable cross-section melts, and arc extinguishing media are arranged between the melting tubes and the variable cross-section melts; the device comprises a plurality of parallel-connected fusion tubes and a busbar connected to the upper end and the lower end of the variable cross-section melt, wherein the busbar is provided with a plurality of external leading contacts, and a heat dissipation channel capable of dissipating heat is formed between the two parallel-connected fusion tubes on the busbar. The utility model discloses simple structure, production cycle is short, has improved the long-term steady operation of direct current cabinet that converges among the energy storage system, has ensured energy storage system's reliability, has alleviateed the routine maintenance cost of fortune dimension, has played fine promotion effect to energy storage system's long-term reliable operation.

Description

Heavy current fuse device with variable cross section fuse-element

Technical Field

The utility model relates to a new forms of energy storage electric wire netting field specifically is a heavy current fuse device with variable cross section fuse-element.

Background

In recent years, with the support of the country on the development of new energy, new energy products have been rapidly developed in recent years, and as an important development direction of new energy systems, energy storage systems have been greatly developed. Particularly, according to the policy of the national energy agency in the present year, all new energy power generation projects including photovoltaic power generation and wind power generation need to be provided with energy storage equipment of a certain scale as supporting facilities for peak clipping and valley balancing, and are designed and built together with the new energy power generation projects, otherwise, the projects cannot be approved by the national energy agency and the development and improvement committee. The energy storage system is a system which is connected with a power grid through an energy storage inverter after a plurality of energy storage batteries are converged. The electric quantity output of the battery in the system is direct current, after confluence combination, the voltage can reach DC1000V-DC1500V, and the current can reach 4000-. But in the aspect of overload, short-circuit protection, because many melts need be arranged in a fusion tube to the production preparation of heavy current fuse, with the requirement of satisfying high voltage heavy current, the electric current is big more, the overall dimension of fuse is big more, the voltage is high more, the length of fuse is long more, so, just to the welding of melt, the mode of arranging, and the material of fusion tube, size and structural style have proposed higher requirement, make the density of arranging of melt bigger and bigger, the degree of difficulty is higher and higher, it is more and more difficult to dispel the heat, the burning degree of fusion tube is also bigger and bigger, the cost is higher and higher. When the technical difficulty is not overcome or the product cost is quite high, a plurality of low-current fuses are connected in parallel on a line for use (for example, 4 fuses with 500A rated current are connected in parallel to meet the protection and use requirements of electric equipment with 2000A rated current, and 6 fuses with 600A are connected in parallel to meet the use requirements of 3500A rated current), but the technical requirements of the scheme that the plurality of fuses are connected in parallel for installation and use are too high, the phenomenon of inconsistent bearing current is easily generated, and the fuses are easily damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heavy current fuse device with variable cross section fuse-element to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a high current fuse device having a variable cross-section melt, comprising:

the two variable cross-section melts are arranged in parallel;

the melting tubes are respectively arranged at the upper opening and the lower opening of the outer ring of the two variable cross-section melts, the melting tubes are as high as the variable cross-section melts, and arc extinguishing media are arranged between the melting tubes and the variable cross-section melts;

the device comprises a plurality of parallel-connected fusion tubes and a busbar connected to the upper end and the lower end of the variable cross-section melt, wherein the busbar is provided with a plurality of external leading contacts, and a heat dissipation channel capable of dissipating heat is formed between the two parallel-connected fusion tubes on the busbar.

As a further aspect of the present invention: the arc extinguishing medium is high-purity quartz sand subjected to special chemical treatment and special chemical substances.

As a further aspect of the present invention: the variable cross-section melt is made of silver flakes with a purity of 99.99%.

As a further aspect of the present invention: the material of the fusion tube is 95# ceramic.

As a further aspect of the present invention: the fuse tube is arranged on the side, far away from the heat dissipation channel, of the fuse tube and used for feeding a fusing signal back to the background.

As a further aspect of the present invention: the external leading contact is a wiring hole which is arranged on the busbar at the upper end and the lower end of the heat dissipation channel.

As a further aspect of the present invention: the applied voltage is DC1000V-DC1500V, and the applied current is 4000A-5000A.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses novel structure specifically makes the variable cross section fuse-element by the pure silver piece that purity reaches 99.99%, then encapsulates this fuse-element in the 95# ceramic fusion tube of high strength, has filled the arc extinguishing medium that high-purity quartz sand and special chemical constitute through special chemical treatment in the fusion tube, and spot welding and the firm electricity of contact are connected to the both ends of fuse-element adoption, considers the resistivity and the heat dissipation demand of conductor, divide into the purpose that two parts are parallelly connected together and realize break-make heavy current with the heavy current. The silver plate has good electric transmission characteristic, high conductivity, small resistivity and good electrical performance, the arc extinguishing medium consisting of quartz sand and special chemical substances has high arc extinguishing performance and can reach 50KA subsection capacity, and the parallel structure design prevents the phenomenon that the heat dissipation problem can not be solved due to the infinite increase of the current carrying rate. The 4000-5000A direct current circuit after confluence has the short-circuit protection function after being additionally provided with the fuse device, and the device has short production period. The long-term stable operation of the direct current header cabinet in the energy storage system is improved, the reliability of the energy storage system is ensured, the daily maintenance cost of operation and maintenance is reduced, and the long-term reliable operation of the energy storage system is well promoted.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a top view of the present invention.

In the figure: 1-variable cross section melt, 2-arc extinguishing medium, 3-fusion tube, 4-busbar, 5-external leading contact, 6-heat dissipation channel and 7-microswitch.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, a large current fuse device with a variable cross-section fuse element includes two variable cross-section fuse elements 1, and the two variable cross-section fuse elements are arranged in parallel; the arc extinguishing medium device comprises a melting tube 3 which is respectively arranged at the upper opening and the lower opening of the outer ring of two variable cross-section melts 1, the melting tube and the variable cross-section melts 1 are equal in height, and an arc extinguishing medium 2 is arranged between the melting tube 3 and the variable cross-section melts; the fuse tube is connected with two parallelly connected fuse tubes 3 and female arranging 4 of the upper and lower end of variable cross section fuse-element 1, female arranging is provided with a plurality of and draws the contact 5 outward, two parallelly connected on female arranging 4 fuse tube 3 is formed with radiating heat dissipation channel 6 between.

Specifically, the variable cross-section melt 1 is made of silver sheets with the purity of 99.99%, flanges extend from the upper end and the lower end of the variable cross-section melt 1, the two variable cross-section melts 1 are arranged in parallel, the silver sheets have good electricity transmission characteristics, the electric conductivity is high, the resistivity is small, the electrical performance is good, the purpose of switching on and off large current is achieved by dividing the large current into two parts which are connected in parallel in consideration of the resistivity and the heat dissipation requirements of conductors, and the phenomenon that the heat dissipation problem caused by the fact that the current bearing rate is increased infinitely is solved is prevented through the design of a parallel structure. The shape of the variable cross-section melt 1 can be changed according to different requirements, so that satisfactory protection characteristics can be obtained, and the special requirements can be met. The specific shape and size of the variable cross-section melt are generally determined by a method of repeated tests, and have specificity and strong adaptability.

Specifically, the arc extinguishing medium 2 is high-purity quartz sand obtained by chemical treatment and sulfur hexafluoride inert gas, the quartz sand is purified by a composite process combining magnetic separation, flotation and acid leaching, the impurity content in quartz sand concentrate is greatly reduced, the high-purity quartz sand is obtained, impurities are further removed by the chemical treatment of acid leaching, the purity of the quartz sand is remarkably improved by the combination of the three processes, and the sulfur hexafluoride inert gas has strong insulating property and achieves the arc extinguishing effect. The arc extinguishing medium 2 consisting of the high-purity quartz sand and the sulfur hexafluoride inert gas has high arc extinguishing performance, and can reach 50KA subsection capacity.

Specifically, the material of the fusion tube 3 is 95# ceramic, the ceramic strength of the type is high, the fusion tube 3 is vertically opened, and the fusion tube 3 is as high as the variable cross-section melt 1.

Specifically, female 4 of arranging is the material of T2, and copper content is more than 99.99%, female 4 welding of arranging sets up fusion tube 3 and variable cross section fuse-element 1 upper and lower extreme, female 4 of arranging with fusion tube 3 and variable cross section fuse-element 1 link to each other.

Specifically, the external leading contact 5 is a wiring hole, which is arranged on the busbar 4 at the upper end and the lower end of the heat dissipation channel 6 and is used for connecting a cable.

Specifically, the heat dissipation channel 6 is formed by connecting two fusion tubes 3 in parallel in a space formed by two ends of the busbar, so that heat dissipation of the fuse is facilitated.

Specifically, still include micro-gap switch 7, it sets up fusion tube 3 keeps away from one side of heat dissipation channel 6, if the condition accessible of fusing appears micro-gap switch 7 feedback fusing signal to backstage protection device reminds operation maintainer.

Specifically, through the experiment, the utility model discloses a fuse in 6 seconds, fuse in 0.02 seconds, fuse in 0.005 seconds through 20 times overcurrent when fusing in 6 times overcurrent, through 12 times overcurrent, realization short-circuit protection function that can be fine.

The following tests were performed for high current fuses of different melt sizes:

example 1

A large-current fuse device with the melt width of 20mm and the thickness of 5mm is connected into a short-circuit protection circuit, the circuit is electrified with 1000V direct current voltage and 4000A direct current, and the voltage, the current, the temperature, the humidity and the resistivity are measured through a CRONOS-PL3 data acquisition system, a ZDR-F20 temperature and humidity recorder, an electronic stopwatch and a megohmmeter.

Example 2

A high-current fuse device with the melt width of 30mm and the thickness of 8mm is connected into a short-circuit protection circuit, the circuit is electrified with 1000V direct current voltage and 4000A direct current, and the voltage, the current, the temperature, the humidity and the resistivity are measured through a CRONOS-PL3 data acquisition system, a ZDR-F20 temperature and humidity recorder, an electronic stopwatch and a megohmmeter.

Example 3

A high-current fuse device with the melt width of 40mm and the thickness of 10mm is connected into a short-circuit protection circuit, the circuit is electrified with 1000V direct current voltage and 4000A direct current, and the voltage, the current, the temperature, the humidity and the resistivity are measured through a CRONOS-PL3 data acquisition system, a ZDR-F20 temperature and humidity recorder, an electronic stopwatch and a megohmmeter.

According to examples 1 to 3, it can be seen that the temperature of the narrow portion of the variable cross-section melt 1 rises rapidly under a large current, so that the narrow portion first reaches the melting point and fuses. The electric arc is divided into several sections according to the narrow part of the melt, and the voltage of each electric arc is lower, so that the electric arc is easy to extinguish. In addition, when the melt is fused, the melt with a large section falls down due to dead weight, so that a larger space gap can be formed, and arc extinction is facilitated.

The utility model discloses novel structure, the operation is stable, the utility model discloses when using, will the utility model discloses an it can to draw contact 5 to connect in the circuit outward.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A high current fuse device having a variable cross-section melt, comprising:

the variable cross-section melt processing device comprises two variable cross-section melts (1), wherein the two variable cross-section melts are arranged in parallel, the thickness of each variable cross-section melt (1) is 5-10mm, and the width of each variable cross-section melt is 20-40 mm;

the arc extinguishing medium (2) is arranged between the melting tube (3) and the variable cross-section melt;

connect two parallelly connected the fusion tube (3) and female arranging (4) of lower extreme on variable cross section fuse-element (1), female arranging is provided with a plurality of and draws contact (5) outward, two parallelly connected on female arranging (4) be formed with heat dissipation channel (6) that can dispel the heat between fusion tube (3).

2. A high current fuse device with a variable cross-section fuse element as claimed in claim 1, further comprising a microswitch (7) arranged on the side of the fuse tube (3) remote from the heat dissipating channel (6) for feeding back a fuse signal to the background.

3. A high current fuse device with a variable cross-section fuse element according to claim 1, characterized in that the external leading contacts (5) are wire holes arranged on the busbar (4) at the upper and lower ends of the heat dissipating channel (6).

4. A high current fuse device having a variable cross-section fuse element as claimed in claim 1, wherein the application voltage of the high current fuse device having a variable cross-section fuse element is DC1000V-DC1500V, and the application current is 4000A-5000A.