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High-current fuse

A fuse and high-current technology, which is applied in the field of high-current fuses for secondary battery protection, can solve the problems of large volume, high cost, and hidden contact resistance of contactors, and achieve the effects of small size, simple structure, and convenient installation

Active Publication Date: 2014-04-02
XIAMEN SET ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of contactor has a large volume and relatively high cost, and because the contact is used to cut off the current, there will also be hidden dangers caused by the ability of the contact to withstand current and its own contact resistance.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] now combined with figure 1 To 6 the specific embodiment of the present invention is further described, in the appended figure 1 Among them are specific preferred embodiments of the present invention. This high-current fuse for secondary battery protection includes a group of main fuses composed of multiple low-melting-point alloy wires (3), which can also be called main temperature fuses (1). The low-melting-point alloy of this embodiment The melting temperature is 130°C; a pair of L-shaped metal plate electrodes (6) and (7), a non-metal shell (4), a non-metal support seat (5), two resistive heating elements (8) and (9 ), a small temperature fuse (10); the above-mentioned non-metal support seat (5) is designed to have notches (16a), (16b) for fixing metal electrodes (6) or (7), no special measures are required A pair of metal electrodes can be fixed so that the two metal flat electrodes can be placed in parallel, and one direction of the above-mentioned L-shaped metal...

Embodiment 2

[0032] Such as Figure 7 to Figure 8 Shown, its structure is similar to embodiment 1, and its circuit structure is as attached Figure 7 As shown, the structure of the main thermal fuse (1) is exactly the same, the difference is that a small thermal fuse (28) is added to the support seat (27), and its two lead wires are independently drawn outward;

[0033] Structurally, the resistive heating element (26) is bonded to the flat metal electrode (7) and permanently fixed with rivets (22). There is direct heat conduction between the heating element and the flat metal electrode. Similarly, the resistive heating element ( 25) It fits with the metal plate electrode (6), and is also fixed by rivets; the non-metal support seat (27) is also provided with notches (16a), (16b) for fixing the metal plate electrodes (6), (7 ); Also be provided with two grooves inside non-metal support seat (27), groove (23) is used for fixing small temperature fuse (10), its effect is identical with its effe...

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PUM

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Abstract

A controlled high current fuse-link is provided, which can protect a rechargeable battery and carry a rating working current of scores or hundreds of Amperes. The controlled high current fuse-link comprises a non-metallic housing (5), which supports two metal plates (6,7). One end of each of the metal plates (6,7) is connected to a high current circuit. The metal plates (6,7) are arranged in parallel, and one side of each of the metal plates (6,7) is designed like a comb by welding strips (11a,11b). Some low melting point alloy wires (3) arranged in parallel to constitute a main fuse-link (1) are linked with the welding strips (11a,11b). The controlled high current fuse-link has two heaters (8,9), which are thermally coupled to the metal plates (6,7) and are powered by another current loop which has no current flowing through normally. When the current of a main circuit is abnormal or the temperature of a battery is abnormal, a monitor circuit will energize the heaters (8,9),and the metal plates (6,7) will be heated up by the heaters (8,9), then the main fuse-link (1) will melt with each of the alloy wires (3) broken completely by the action of fluxes. Furthermore, there is a small thermal fuse (10) connected in series to the heaters (8,9). As the melting temperature of the small thermal fuse (10) is higher than that of the main fuse-link (1), the main fuse-link (1) is broken earlier.

Description

technical field [0001] The invention relates to a high-current fuse, in particular to a high-current fuse for secondary battery protection working at low voltage Background technique [0002] In recent years, the technical development of secondary batteries has been increasingly advanced, and power batteries for various purposes have also been developed. Electric bicycles, sightseeing cars, buses, electric vehicles, communications, post and telecommunications, railways, military ships and other fields will drive the vigorous development of the entire power lithium battery industry. Efficient new energy. Generally, the discharge current of these power battery packs is above tens of amperes, and some even reach hundreds of amperes. Due to the widespread use of power batteries, there is a problem of protecting the charging and discharging of power battery packs. For example, there has been a power battery management system composed of electronic circuits, which is a contacto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H85/041H01H85/05H01H85/12
CPCH01H85/0047H01H85/12
Inventor 徐忠厚许由生江鸿盛
Owner XIAMEN SET ELECTRONICS