CN220189543U

CN220189543U - Fuse link for protecting battery and battery system

Info

Publication number: CN220189543U
Application number: CN202321791587.3U
Authority: CN
Inventors: 戎峰; 仇利民; 龚建; 吴辉
Original assignee: Semitel Electronics Co Ltd
Current assignee: Semitel Electronics Co Ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2023-12-15
Anticipated expiration: 2033-07-10

Abstract

The utility model provides a fuse link for protecting a battery and a battery system, which comprises a fusion pipe, contact plates, melts, quartz sand filling bodies and impactors, wherein the contact plates are arranged at two ends of the fusion pipe, a flat plate matched with an inner cavity of the fusion pipe is arranged on the inner side of each contact plate, a plurality of melts are arranged between the two contact plates, the quartz sand filling bodies filled between the melts are arranged in the inner cavity of the fusion pipe, and the impactors are arranged outside the fusion pipe and are connected with a fusing indicator arranged in an indicating hole of the fusion pipe; a plurality of groups of row holes which are arranged in an array manner are arranged in the length direction of the melt, each row of holes comprises a plurality of waist-shaped holes which are arranged in an array manner, and narrow diameters with the length L are arranged between every two adjacent waist-shaped holes; v-shaped bending parts are arranged between the adjacent row holes. The utility model can be used in DC 1000V, DC V and DC2000V systems, the rated current of the single body is up to 4000A, the breaking capacity is up to 250kA, the fusing characteristic is stable, and the utility model can completely meet the high-current application occasion of energy storage equipment.

Description

Fuse link for protecting battery and battery system

Technical Field

The utility model relates to the technical field of fuse links, in particular to a fuse link for protecting a battery and a battery system.

Background

Low voltage fuses have been of interest in the marketplace as protective components. According to different application occasions, the fuse can be divided into a common low-voltage fuse link, a fuse link for protecting semiconductor equipment and a fuse link for protecting a solar photovoltaic system. Common low-voltage fuses are mainly used for alternating current systems, but with continuous updating of applications, the use of direct current systems is gradually increased, and particularly the rise of energy storage industry is raised, and more direct current-based fuses are needed to be selected for system protection. Most rated currents in the existing similar products are not large, and a plurality of fuses are usually required to be connected in parallel to meet the protection requirements of high-current application occasions. In addition, the fuse-link mainly comprises a fusion tube, a melt, a filler, an end cover and the like, and the fusion tube selected for the common fuse-link is a common ceramic tube, so that the high-temperature resistance and the corrosion resistance are poor, and the fuse-link is not attractive.

Disclosure of Invention

The utility model aims to provide a fuse link for protecting a battery and a battery system, which overcomes the defects in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a battery and battery system protection are with fuse-link, includes fusion tube, contact plate, fuse-element, quartz sand filling body, impacter, the both ends of fusion tube are equipped with the contact plate, the contact plate inboard is equipped with the dull and stereotyped with fusion tube inner chamber adaptation, is equipped with a plurality of fuse-elements between two the contact plate, be equipped with the quartz sand filling body of filling between the fuse-element in the fusion tube inner chamber, the impacter is located the fusion tube outside and is connected with the fusing indicator that locates in the fusion tube instruction hole; a plurality of groups of row holes which are arranged in an array manner are arranged in the length direction of the melt, each row of holes comprises a plurality of waist-shaped holes which are arranged in an array manner, and narrow diameters with the length L are arranged between every two adjacent waist-shaped holes; v-shaped bending parts are arranged between the adjacent row holes.

Further, in the battery and the fuse for protecting a battery system, the length L of the narrow diameter is 2 to 4mm.

Further, the battery and the fuse link for protecting the battery system are characterized in that the end plates are fixed at two ends of the fuse tube, the end plates are formed by stamping and connected with the fuse tube through fasteners, and the contact plates are fixed at two ends of the fuse tube through assembly with the end plates.

Further, the battery and the fuse link for protecting the battery system, wherein the inner surface of the contact plate flat plate is provided with a plurality of positioning lines symmetrically arranged in a central line manner, two ends of the melt are provided with connecting parts bent in the same direction, and the connecting parts are welded on the contact plate in an aligned manner with the positioning lines, so that the melt and the axis of the melting pipe are arranged in the inner cavity of the melting pipe in parallel.

Furthermore, the fuse link for protecting the battery and the battery system is characterized in that the fuse tube is made of high-strength alumina ceramics.

Further, the fuse body for protecting the battery and the battery system is made of 99.9% pure silver.

Furthermore, the battery and the fuse link for protecting the battery system are characterized in that connecting pieces are arranged at two ends of the striker and are fixed on the end plate through the connecting pieces.

Furthermore, the battery and the fuse link for protecting the battery system are formed by heating and curing quartz sand by a curing agent.

Compared with the prior art, the utility model has the beneficial effects that:

1, rated current is larger, and the maximum rated current is 4000A;

2, the rated voltage is higher, and the maximum rated voltage reaches DC2000V;

and 3, the breaking capacity is improved, and the maximum breaking capacity is up to 250kA.

4, the fusing characteristic is stable, and the protection of the circuit is more reliable;

5, the structure of the melt improves the electrical property and the thermal property, and the working temperature rise and the heat dissipation capacity are improved;

and 6, adopting high-strength alumina ceramic as a melting pipe, so that the appearance of the fuse link is more attractive.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic view showing the external structure of a fuse link for protecting a battery and a battery system according to the present utility model;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic view of the melt structure of the battery and battery system protection fuse link of the present utility model;

FIG. 4 is a schematic view showing a partial structure of a melt of the fuse link for battery and battery system protection of the present utility model;

FIG. 5 is a schematic partial cross-sectional view of a battery and battery system protection fuse of the present utility model;

FIG. 6 is a schematic view of the positioning wires of the battery and battery system protection fuse of the present utility model;

in the figure: 1. a fusion pipe; 2. a contact plate; 21. a positioning line; 3. a melt; 31. arranging holes; 32. a waist-shaped hole; 33. a bending part; 34. a connection part; 4. a quartz sand filler; 5. a striker; 6. a fuse indicator; 7. an end plate; 8. and a connecting sheet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-6, the fuse link for protecting the battery and the battery system comprises a fuse tube 1, a contact plate 2, a melt 3, a quartz sand filling body 4 and a striker 5, wherein the fuse tube 1 is made of high-strength alumina ceramic, and the material has good high-temperature resistance, corrosion resistance and insulation performance, improves the expansion resistance, and has attractive appearance; the utility model discloses a smelting pipe, including smelting pipe 1, end plate 7, contact plate 2 inboard is equipped with the dull and stereotyped with the inner chamber adaptation of smelting pipe 1, and smelting pipe 1 inner chamber is square or circular, smelting pipe 1 both ends are fixed with end plate 7, end plate 7 stamping forming is connected with smelting pipe 1 through the fastener, contact plate 2 is fixed at the both ends of smelting pipe 1 through with the assembly of end plate 7.

In the above structure, as shown in fig. 3-5, a plurality of melts 3 are arranged between two contact plates 2, and the melts 3 are made of 99.9% pure silver; a plurality of groups of row holes 31 which are arrayed are arranged in the length direction of the melt 3, each row hole 31 comprises a plurality of waist-shaped holes 32 which are arrayed, a narrow diameter with the distance delta is arranged between every two adjacent waist-shaped holes 32, and the length L of the narrow diameter is 2mm; the conventional row holes 32 are round holes, the narrow diameters among the round holes are small, the breaking current limiting capacity is limited under the condition of high voltage direct current, the waist-shaped holes 32 are arranged, so that the length of the narrow diameters is extended, current is collected on the small narrow diameters, when a short-circuit current exists in the system, the short-circuit current can be rapidly cut off, and the breaking current limiting performance is good; the V-shaped bending parts 33 are arranged between the adjacent row holes 32, and because of the use environment of high voltage and high current, the external dimension of the melt 3 is widened and lengthened to a certain extent, and a V-shaped bending part is added between each row hole 32 and each row hole 32 of the melt 3, so that the elasticity of the melt 3 can be increased, and the heat dissipation effect can be realized during working.

As shown in fig. 5, a quartz sand filling body 4 filled between the melts 3 is arranged in the inner cavity of the melting tube 1, and the quartz sand filling body 4 is formed by heating and solidifying quartz sand by a solidifying agent. Specifically, quartz sand is filled into the inner cavity of the melting pipe through different vibration frequencies and time, and the quartz sand particles can be compacted through different vibration frequencies; slowly injecting the curing agent into the quartz sand through the equipment until the quartz sand is full; and then heating and drying the fused mass to solidify the quartz sand, and wrapping the fused mass 3 inside the fused mass after solidification, so that the breaking capacity of the fuse link can be greatly improved.

In addition, as shown in fig. 1, 2 and 5, the impactor 5 is arranged outside the fusion tube 1 and is connected with the fusing indicator 6 arranged in the indicating hole of the fusion tube 1, and two ends of the impactor 5 are provided with connecting sheets 8 and are fixed on the end plate 7 through the connecting sheets, so that the connection is stable and reliable.

In addition, as shown in fig. 5 and 6, the inner surface of the flat plate of the contact plate 2 is provided with a plurality of positioning lines 21 with central lines symmetrically arranged, two ends of the melt 3 are provided with connecting parts 34 bent towards the same direction, and the connecting parts 34 are aligned with the positioning lines 21 and welded on the contact plate 2, so that the melt 3 and the axis of the melting tube 1 are arranged in the inner cavity of the melting tube 1 in parallel. By means of the positioning lines 21 on the contact plates 2, the melt 3 can be positioned more conveniently and accurately during spot welding, the phenomenon of abnormal temperature rise or arc explosion when short-circuit current is fused due to lap joint between the melt 3 is avoided, the stability of the fuse link is guaranteed, and the service life of the fuse link is prolonged.

Example 2

In the above structure, as shown in fig. 3-5, a plurality of melts 3 are arranged between two contact plates 2, and the melts 3 are made of 99.9% pure silver; a plurality of groups of row holes 31 which are arrayed are arranged in the length direction of the melt 3, each row hole 31 comprises a plurality of waist-shaped holes 32 which are arrayed, a narrow diameter with a distance delta is arranged between every two adjacent waist-shaped holes 32, and the length L of the narrow diameter is 4mm; the conventional row holes 32 are round holes, the narrow diameters among the round holes are small, the breaking current limiting capacity is limited under the condition of high voltage direct current, the waist-shaped holes 32 are arranged, so that the length of the narrow diameters is extended, current is collected on the small narrow diameters, when a short-circuit current exists in the system, the short-circuit current can be rapidly cut off, and the breaking current limiting performance is good; the V-shaped bending parts 33 are arranged between the adjacent row holes 32, and because of the use environment of high voltage and high current, the external dimension of the melt 3 is widened and lengthened to a certain extent, and a V-shaped bending part is added between each row hole 32 and each row hole 32 of the melt 3, so that the elasticity of the melt 3 can be increased, and the heat dissipation effect can be realized during working.

In summary, the fuse link for protecting the battery and the battery system is suitable for a direct current system, and the characteristics of the battery and the battery system are considered, when fault current is encountered in use, the part with the width delta narrow diameter in the melt 4 can be rapidly melted, an instant arc is generated, the arc can be cooled by solidified quartz sand and extinguished, and reliable protection is provided for related circuits and components. The battery and the fuse link for protecting the battery system can be used in a DC 1000V, DC V and DC2000V system, the rated current of a single body is up to 4000A, the breaking capacity is up to 250kA, and the requirement of energy storage equipment can be completely met.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A fuse link for battery and battery system protection, characterized in that: the device comprises a fusion pipe, contact plates, melts, quartz sand filling bodies and impactors, wherein the contact plates are arranged at two ends of the fusion pipe, a flat plate matched with an inner cavity of the fusion pipe is arranged on the inner side of each contact plate, a plurality of melts are arranged between the two contact plates, the quartz sand filling bodies filled between the melts are arranged in the inner cavity of the fusion pipe, and the impactors are arranged outside the fusion pipe and connected with fusing indicators arranged in an indicating hole of the fusion pipe; a plurality of groups of row holes which are arranged in an array manner are arranged in the length direction of the melt, each row of holes comprises a plurality of waist-shaped holes which are arranged in an array manner, and narrow diameters with the length L are arranged between every two adjacent waist-shaped holes; v-shaped bending parts are arranged between the adjacent row holes.

2. The battery and battery system protecting fuse link of claim 1, wherein: the length L of the narrow diameter is 2-4mm.

3. The battery and battery system protecting fuse link of claim 1, wherein: end plates are fixed at two ends of the fusion tube, the end plates are formed by stamping and are connected with the fusion tube through fasteners, and the contact plates are fixed at two ends of the fusion tube through being assembled with the end plates.

4. The battery and battery system protecting fuse link of claim 1, wherein: the inner surface of the contact plate flat plate is provided with a plurality of positioning lines symmetrically arranged in a central line, two ends of the melt are provided with connecting parts bent in the same direction, and the connecting parts are welded on the contact plate in an aligned manner with the positioning lines, so that the melt and the axis of the melting pipe are arranged in the inner cavity of the melting pipe in parallel.

5. The battery and battery system protecting fuse link of claim 1, wherein: the melting pipe is made of high-strength alumina ceramics.

6. The battery and battery system protecting fuse link of claim 1, wherein: the melt was made with 99.9% pure silver.

7. The battery and battery system protecting fuse link of claim 3, wherein: connecting pieces are arranged at two ends of the impactor and are fixed on the end plate through the connecting pieces.

8. The battery and battery system protecting fuse link of claim 1, wherein: the quartz sand filling body is formed by heating and curing quartz sand through a curing agent.