CN2433729Y

CN2433729Y - Thin temp. fuse

Info

Publication number: CN2433729Y
Application number: CN 00246178
Authority: CN
Inventors: 吕俊杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-10
Filing date: 2000-08-10
Publication date: 2001-06-06
Anticipated expiration: 2010-08-10

Abstract

The utility model relates to a thin temperature fuse. Low-melting alloy is connected between two conductive pieces, and the two conductive pieces are coated with a layer of resin thin film. The utility model is mainly used in a lithium secondary battery of a cell phone and is used for protecting the safety of the lithium battery and the cell phone. Aiming to the problem that when the battery is charged or continuously discharge electricity, the temperature slowly rise and overheats, the lithium battery is destroyed, and electronic components in the cell phone are also be influenced, the utility model controls the fuse with the temperature and generates actuation to form a broken circuit when the temperature of the lithium battery is too high, the current can not be conducted, and the safety of the lithium battery and the cell phone is protected.

Description

The thin temperature fuse

The utility model is a kind of thin temperature fuse, refers to especially be used in the lithium secondary battery, and thin temperature fuse that just can start in certain temperature range.

Recent years, communications industry is flourishing day by day, and especially aspect radio communication, it almost is everyone staff one machine that the market of mobile phone has spread to.At present the battery of mobile phone generally all adopts lithium secondary battery, because of its have compact, and the good characteristic of endurance.But common people when charging regular meeting because factor such as busy, and lithium battery is put for a long time in charger, even is had many people to fill the charger of formula with travelling.Of a specified duration if charge, probably be directed at battery and damage, even mobile phone also can be affected, can cause also perhaps that what is more electric wire cocks off and leads to the anxiety of fire.So being set, fuse protected its necessity in lithium battery.And general fuse is the electric current fuse, and its start principle is: undesired electric current or electric current are excessive as if having, and surpass the load of this fuse, and this fuse just becomes an off state and can't switch on, and just can not respond during as if current stabilization.But this kind electric current fuse still has following shortcoming:

(1) even under the state of current stabilization, characteristic according to all electronic building bricks, the rising that its temperature still can continue, temperature be if continue to raise cathode block precipitating metal lithium and touch the anode seat gradually in lithium battery, promptly can cause short circuit thus and destroy lithium battery even mobile phone.

2) again, because of it is produced under a stabling current persistently overheating, so known electric current fuse can not react to some extent.If temperature is too high, then electronic building brick probably has the anxiety of burning.

The purpose of this utility model provides a kind ofly utilizes temperature to control but not with the thin temperature fuse of Current Control, the fuse assembly in this thin temperature fuse adopts low-melting alloy, and its actuation temperature is

Spend between Celsius temperature 110 degree in Celsius temperature 90, this low-melting alloy just can fuse and form off state in case be above standard, and under this temperature, can't have influence on the normal operation of electronic building brick and cathode block also can the precipitating metal lithium, so can guarantee the safety of lithium battery when discharging and recharging.

The purpose of this utility model is achieved in that a kind of thin temperature fuse, is made up of guide card, fuse assembly and protective sheet; It is characterized in that: two straight lines of guide card are arranged side by side, separate with distance between certain, and be connected with a fuse assembly between two guide cards, and two guide cards connect into a linearity; Closed state is all combined closely into mutually by two protective sheet institute's double team and two protective sheet in above-mentioned guide card, its two sides of fuse assembly; The fuse assembly of thin temperature fuse is made of low-melting alloy, and the actuation temperature of this low-melting alloy is to spend to Celsius temperature 110 degree in Celsius temperature 90; The fuse assembly of thin temperature fuse is to be connected by hot melt with connected mode between the guide card; Fuse assembly is to be connected by the gummed method with connected mode between the guide card; The protective sheet of thin temperature fuse is made of resin film.

The utility model has the advantages that: the fail safe of protection lithium battery and mobile phone; at battery in charging or during continuous discharge; it is overheated that temperature slowly raises; not only can destroy lithium battery itself; and to the problem that electronic building brick in the mobile phone also can exert an influence, utilize temperature to control this fuse, when the temperature of lithium battery too high; then this Thermal Cutoffs generation start forms off state and can't conduct electricity, and then the safety of protection lithium battery and mobile phone.

Now just cooperate icon that technology contents of the present utility model is done a detailed description:

The icon simple declaration

Fig. 1 is a stereoscopic schematic diagram of the present utility model.

Fig. 2 is a structural profile schematic diagram of the present utility model.

Fig. 3 is the stereoscopic schematic diagram of the utility model electrode body and storage battery.

Fig. 4 is the utility model electrode body STRUCTURE DECOMPOSITION schematic diagram.

Fig. 5 is the utility model anode seat plane graph.

Fig. 6 is the utility model cathode block plane graph.

Fig. 7 is the utility model lithium secondary battery stereoscopic schematic diagram.

At first seeing also Figure 1 and Figure 2, is the stereoscopic and the structural profile schematic diagram of the utility model thin temperature fuse 1.As shown in the figure, it is that two guide cards 11 are in line side by side, and separates configuration with certain interval, and then the mode with hot melt or gummed is connected with a fuse assembly 12 between two guide cards 11, and two guide cards 11 are connected into a linearity.Moreover closed state is all combined closely into mutually by 13 double teams of protective sheet and two protective sheet 13 in above-mentioned guide card 11, fuse assembly 12 its two sides.This protective sheet 13 is made of resin film, and it possesses insulating properties and thermal endurance, is to be used for protecting fuse assembly 12 not corroded by electrolyte.And this fuse assembly is made of low-melting alloy, and its actuation temperature is spent to Celsius temperature 110 degree in Celsius temperature 90.

Now the utility model example is illustrated.See also Fig. 3, Fig. 4, Fig. 5, Figure 6 and Figure 7.Lithium secondary battery is with ribbon anode seat 21, cathode block 22 and after division board 23 backrush simultaneously become the electrode body 2 of flat turbine-like, inserts storage battery 3 again and forms.Its anode seat 21 is to coat anode mixture such as lithium and cobalt oxides as the two sides of the aluminium foil 212 of collector body and form anode mixture coating 211 (representing with cross hatching among the figure), but be not coated with anode mixture 211 so that continue an aluminium guide card 4 in its end, and the end of this aluminium guide card 4 is given prominence to above electrode body 2.In like manner, its cathode block 22 is to coat the negative electrode mixture and form negative electrode mixture coating 221 on the two sides of a Copper Foil 222, and also is not coated with the negative electrode mixture and the Thermal Cutoffs 1 that continues in its end, and 11 of guide cards of this Thermal Cutoffs 1 are given prominence to above electrode body 2.Then from an end according to fixed range repeatedly folding be rolled into flat turbine-like electrode body 2, insert storage battery 3 again, add electrolyte at last, promptly form lithium secondary battery 5.The utility model thin temperature fuse 1, be to utilize temperature to control its start but not utilize Current Control, the actuation temperature of this fuse assembly 12 is to spend to Celsius temperature 110 degree in Celsius temperature 90, this fuse assembly 12 that is above standard promptly fuses and forms off state, and under this temperature, cathode block 22 can't the precipitating metal lithium, so can not cause short circuit.Thereby can guarantee the safety of lithium secondary battery 5 when discharging and recharging.

The above is the utility model preferred embodiment, when can not with qualification the utility model practical range.So, all belong to the utility model protection category at the embodiment that does not change the utility model essence.

The legend explanation

Thin temp. fuse 1 guide card 11

Fuse assembly 12 protective sheet 13

Electrode body 2 anode seats 21

Anode closes 211 aluminium foils 212

Cathode block 22 negative electrode mixture coatings 221

Copper Foil 222 division boards 23

Storage battery 3 aluminium guide cards 4

Resin seat 41 lithium secondary batteries 5

Claims

1 one kinds of thin temperature fuses are made up of guide card (11), fuse assembly (12) and protective sheet (13); It is characterized in that: (11) two straight lines of this guide card are arranged side by side, separate with distance between certain, and be connected with a fuse assembly (12) between two guide cards (11), and two guide cards (11) connect into a linearity; Closed state is all combined closely into mutually by two protective sheet (13) institute's double team and two protective sheet (13) in above-mentioned guide card (11), its two sides of fuse assembly (12).

2 thin temperature fuses according to claim 1 is characterized in that fuse assembly (12) is made of low-melting alloy, and the actuation temperature of this low-melting alloy is to spend to Celsius temperature 110 degree in Celsius temperature 90.

3 thin temperature fuses according to claim 1 is characterized in that fuse assembly (12) is to be connected by hot melt with connected mode between the guide card (11).

4 thin temperature fuses according to claim 1 is characterized in that fuse assembly (12) is to be connected by the gummed method with connected mode between the guide card (11).

5 thin temperature fuses according to claim 1 is characterized in that protective sheet (13) is made of resin film.