CN201402776Y - Strip-shaped thermal fuse - Google Patents
Strip-shaped thermal fuse Download PDFInfo
- Publication number
- CN201402776Y CN201402776Y CN2009200700906U CN200920070090U CN201402776Y CN 201402776 Y CN201402776 Y CN 201402776Y CN 2009200700906 U CN2009200700906 U CN 2009200700906U CN 200920070090 U CN200920070090 U CN 200920070090U CN 201402776 Y CN201402776 Y CN 201402776Y
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- CN
- China
- Prior art keywords
- fusible alloy
- box body
- strip
- metal electrodes
- thermal cutoffs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a strip-shaped thermal fuse comprising two strip-shaped metal electrodes in linear arrangement, an interval is reserved between the two adjacent end parts of the electrodes, a fusible alloy wire is installed in the position of the interval, and the fusible alloy wire serves to connect the two strip-shaped metal electrodes. The thermal fuse further comprises an enclosedcavity enclosing the fusible alloy wire and connecting parts between the wire and the two strip-shaped metal electrodes, and the enclosed cavity comprises a box body and a cover board. The thermal fuse provided by the utility model has the advantages of simple structure, excellent leak tightness, simple manufacturing process and high production efficiency.
Description
Technical field
The utility model relates to the overheat protection electronic devices and components, particularly a kind of banded Thermal Cutoffs.
Background technology
Along with the continuous progress of science and technology, portable electric appts is universal day by day, and mobile phone, MP3, PDA, notebook computer and digital camera etc. have become the part of people's daily life.Therefore, the fail safe as the battery of these portable electric appts important component parts also more and more comes into one's own.Lithium ion chargeable battery has big capacity, and the advantage that volume is little is the main flow in current battery market.But lithium ion chargeable battery is in short circuit, overcharges or charging current when excessive, causes that easily battery acutely heats up, and then the accident of blasting, burning, the harm personal safety.So lithium ion chargeable battery requires excess temperature, overcurrent protective device must be installed.At present, the frequent protection scheme that adopts of lithium ion chargeable battery mainly contains two kinds: PTC thermistor and Thermal Cutoffs.
The operation principle of PTC thermistor is: it is initially low resistance state, and electric current is excessive in circuit, and when temperature raise, its resistance value sharply raise, thus the metering function of playing.And get rid of when fault, after temperature descended, it can recover low resistance state again.Therefore, the PTC thermistor be actually a kind of can self-healing fuse, can use repeatedly.But when the PTC thermistor was in the high resistant guard mode, circuit did not disconnect fully, therefore, still had remaining leakage current to exist in the circuit, and lithium ion chargeable battery is still in running order, and potential safety hazard may exist.
The Thermal Cutoffs major part is the fusible alloy silk, and when battery temperature was elevated to the fusible alloy fusing point, the fusing of fusible alloy silk disconnected, thereby cut off circuit protected cell.Therefore, Thermal Cutoffs is obtaining increasingly extensive application as a kind of safe and reliable battery protection scheme.
Current battery protection Thermal Cutoffs; common structure is two strip metal extraction electrodes; middle with the connection of fusible alloy silk, wherein the fusible alloy silk wraps up flux around connecting, and is sealed in the plastic casing together with being attached thereto a part of strip metal extraction electrode that connects.Described plastic casing is formed by base plate, bonding sheet and cover cap bonding, the metal extraction electrode by hot melting cohesion between base plate and bonding sheet.Because complex structure, bonding interface is many, the slit occurs at bonding interface easily, causes inner flux to reveal, and influences the security of products energy.
The utility model content
Technical problem to be solved in the utility model provides a kind of simple in structure, the Thermal Cutoffs that sealing is good.
For solving the problems of the technologies described above, the Thermal Cutoffs that the utility model provides comprises the two strip metal electrodes that are arranged in a linear, its close both ends have one at interval, and be equiped with a fusible alloy silk in described interval, described fusible alloy silk links described two strip metal electrodes, also comprise an airtight cavity, in it was packaged in described fusible alloy silk and with the connecting portion of two strip metal electrodes, this airtight cavity comprised box body and cover plate.
As a kind of preferred version of the present utility model, described box body surrounds in interior with described fusible alloy silk and with the connecting portion of two strip metal electrodes, and the side is provided with an opening thereon.
As a kind of preferred version of the present utility model, described cover plate links in the opening part and the described box body of described box body.
As a kind of preferred version of the present utility model, described cover plate is that relative box body is crowned.
As a kind of preferred version of the present utility model, in described airtight cavity, be filled with flux, it is layed on the described fusible alloy silk.
As a kind of preferred version of the present utility model, the fusing point of described flux is lower than the fusing point of described fusible alloy.
Technique effect of the present utility model is, obtains the airtight cavity of Thermal Cutoffs by adopting injection mo(u)lding, makes that product hermeticity can be good, has simplified product structure, and manufacturing process is simple simultaneously, the production efficiency height.
Description of drawings
Below in conjunction with accompanying drawing and better embodiment the utility model is described in further detail.
Fig. 1 is the structural representation of first better embodiment of the utility model Thermal Cutoffs; And
Fig. 2 is the generalized section of second better embodiment of the utility model Thermal Cutoffs.
Embodiment
As shown in Figure 1, Thermal Cutoffs of the present utility model comprises that a pair of being in line connects by fusible alloy silk 3 between strip metal electrode 1,2, the two strip metal electrodes of arranging 1,2, is coated with flux 4 around the described fusible alloy silk 3; The part that described fusible alloy silk 3, flux 4 and strip metal electrode 1,2 are connected with fusible alloy silk 3 all is encapsulated in the airtight cavity.Described encapsulation cavity comprises box body 6 and cover plate 5.Described box body 6 surrounds in interior with described fusible alloy silk 3 and with the connecting portion of two strip metal electrodes 1,2, and the side is provided with an opening thereon, and described cover plate 5 links in the opening part and the described box body 6 of described box body 6.
As shown in Figure 2, described flux 4 not only can directly be coated on the fusible alloy silk, also can be pre-filled in the ridge of cover plate 5, then cover plate 5 is welded on the box body 6.
Described box body 6 and cover plate 5 materials are made of the thermoplastic macromolecule resin, are selected from polyethylene, polypropylene, mylar, polyimide resin, polyamide, polyvinylidene fluoride resin, PET resin, PEN resin, PBT resin, Merlon etc.
Described strip metal electrode 1,2, preferably nickel strap also can be the metal material of nickel alloy material or nickel plating.
The contact portion of described strip metal electrode 1,2 and box body 6 is preferably carried out the surface roughening processing, thus the caking property of increase and macromolecule resin.
Described fusible alloy silk 3 is meant the wire that can fuse at a certain temperature.
Described flux 4 is selected for use than fusible alloy silk 3 low-melting materials, such as containing rosin, the hydrochloride composition of stearic acid and diethylamine.
Below preferred embodiment of the present utility model is specified, but the utility model is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of the invention spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (6)
1. banded Thermal Cutoffs, comprise the two strip metal electrodes that are arranged in a linear, its close both ends have one at interval, and be equiped with a fusible alloy silk in described interval, described fusible alloy silk links described two strip metal electrodes, it is characterized in that, also comprises an airtight cavity, in it was packaged in described fusible alloy silk and with the connecting portion of two strip metal electrodes, this airtight cavity comprised box body and cover plate.
2. banded Thermal Cutoffs according to claim 1 is characterized in that, described box body surrounds in interior with described fusible alloy silk and with the connecting portion of two strip metal electrodes, and the side is provided with an opening thereon.
3. banded Thermal Cutoffs according to claim 2 is characterized in that, described cover plate links in the opening part and the described box body of described box body.
4. banded Thermal Cutoffs according to claim 3 is characterized in that, described cover plate is that relative box body is crowned.
5. according to claim 3 or 4 described banded Thermal Cutoffs, it is characterized in that be filled with flux in described airtight cavity, it is layed on the described fusible alloy silk.
6. banded Thermal Cutoffs according to claim 5 is characterized in that, the fusing point of described flux is lower than the fusing point of described fusible alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200700906U CN201402776Y (en) | 2009-04-09 | 2009-04-09 | Strip-shaped thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200700906U CN201402776Y (en) | 2009-04-09 | 2009-04-09 | Strip-shaped thermal fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201402776Y true CN201402776Y (en) | 2010-02-10 |
Family
ID=41662577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200700906U Expired - Lifetime CN201402776Y (en) | 2009-04-09 | 2009-04-09 | Strip-shaped thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201402776Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859664A (en) * | 2009-04-09 | 2010-10-13 | 上海神沃电子有限公司 | Temperature fuse and manufacturing method thereof |
| CN102522263A (en) * | 2011-12-31 | 2012-06-27 | 上海长园维安电子线路保护有限公司 | Temperature fuse capable of being soldered through reflow |
| CN106816766A (en) * | 2017-03-31 | 2017-06-09 | 北京态金科技有限公司 | Electric connector |
-
2009
- 2009-04-09 CN CN2009200700906U patent/CN201402776Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859664A (en) * | 2009-04-09 | 2010-10-13 | 上海神沃电子有限公司 | Temperature fuse and manufacturing method thereof |
| CN101859664B (en) * | 2009-04-09 | 2013-12-04 | 上海神沃电子有限公司 | Temperature fuse and manufacturing method thereof |
| CN102522263A (en) * | 2011-12-31 | 2012-06-27 | 上海长园维安电子线路保护有限公司 | Temperature fuse capable of being soldered through reflow |
| CN106816766A (en) * | 2017-03-31 | 2017-06-09 | 北京态金科技有限公司 | Electric connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100210 |
|
| CX01 | Expiry of patent term |