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A high current fuse

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

Active Publication Date: 2011-12-21
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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  • A high current fuse
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  • A high current fuse

Examples

Experimental program
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Effect test

Embodiment 1

[0028] now combined with figure 1 To 6 further describe the specific embodiment of the present invention, 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 fla...

Embodiment 2

[0032] like 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 effect ...

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PUM

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Abstract

The invention relates to a high-current fuse, which is used for protecting devices, such as a secondary battery with the carrying rated current of dozens of amp and even hundreds of amp, and the like. The high-current fuse comprises a special non-metal support base, which is used for supporting two metal planar electrodes in parallel. The metal planar electrodes also are high-current terminals connected to a main loop. A plurality of alloy silks with low melting point are connected in parallel to form a fuse capable of bearing high current through the planar electrodes. A resistance heating body tightly and thermally coupled with the planar electrodes is also designed in the high-current fuse. The current of the heating body is supplied by another power supply loop. Under normal conditions, no current flows through the power supply loop; when the current in the main circuit is too high, the voltage is too high, and the temperature of a storage battery is too high, a monitoring circuit sends out instruction so that a heating circuit is electrified; the temperature of the metal planar electrodes can be increased through the heat of the heating body so that the main fuse is molten; furthermore, under the action of assistant fusing agent, each alloy silk can be well disconnected; and a small temperature fuse, temperature of which is higher than the melting temperature of the main fuse, is connected with the heating body in series, therefore, the main fuse is disconnected at first.

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