CN101859664B - Temperature fuse and manufacturing method thereof - Google Patents
Temperature fuse and manufacturing method thereof Download PDFInfo
- Publication number
- CN101859664B CN101859664B CN2009100489996A CN200910048999A CN101859664B CN 101859664 B CN101859664 B CN 101859664B CN 2009100489996 A CN2009100489996 A CN 2009100489996A CN 200910048999 A CN200910048999 A CN 200910048999A CN 101859664 B CN101859664 B CN 101859664B
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- China
- Prior art keywords
- box body
- fusible alloy
- strip metal
- alloy silk
- cover plate
- 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.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910000743 fusible alloy Inorganic materials 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims description 25
- 229920005989 resin Polymers 0.000 claims description 25
- 230000004907 flux Effects 0.000 claims description 15
- 229920002521 macromolecule Polymers 0.000 claims description 13
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 229910052759 nickel Inorganic materials 0.000 description 8
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000008117 stearic acid Substances 0.000 description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000005041 Mylar™ Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- CBPYOHALYYGNOE-UHFFFAOYSA-M potassium;3,5-dinitrobenzoate Chemical compound [K+].[O-]C(=O)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1 CBPYOHALYYGNOE-UHFFFAOYSA-M 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229910000634 wood's metal Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
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Abstract
The invention discloses a flat temperature fuse and a manufacturing method thereof. The temperature fuse comprises two ribbon-like metal electrodes and a closed cavity, wherein the two ribbon-like metal electrodes are linearly arranged, a space is arranged between the opposite ends of the two metal electrodes, and the space is provided with a fusible alloy wire; the fusible alloy wire connects the two ribbon-like metal electrodes; the joints of the fusible alloy wire and the two ribbon-like metal electrodes are packaged in the closed cavity; and the closed cavity comprises a box body and a cover plate. The temperature fuse has the advantages of simple structure, favorable tightness, simple manufacturing technique and high production efficiency.
Description
Technical field
The present invention relates to electronic devices and components and manufacture method, particularly a kind of flat Thermal Cutoffs and manufacture method thereof for overheat protection.
Background technology
Along with the continuous progress of science and technology, portable electric appts is day by day universal, 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 large 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, overcharge or charging current when excessive, easily cause that battery acutely heats up, so that 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 protection scheme that lithium ion chargeable battery often adopts mainly contains two kinds: PTC thermistor and Thermal Cutoffs.
The operation principle of PTC thermistor is: it is initially low resistance state, and in circuit, electric current is excessive, and when temperature raises, its resistance value sharply raises, thus the metering function of playing.And get rid of when fault, after temperature descends, it can recover low resistance state again.Therefore, the PTC thermistor be actually a kind of can self-healing fuse, can Reusability.But the PTC thermistor is when the high resistant guard mode, circuit does not disconnect fully, therefore, in circuit, still has remaining leakage current to exist, 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 is elevated to the fusible alloy fusing point, the fusing of fusible alloy silk disconnects, thereby cuts off circuit protected cell.Therefore, Thermal Cutoffs, as a kind of safe and reliable battery protection scheme, is obtaining increasingly extensive application.
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 together with being attached thereto a part of strip metal extraction electrode connect, is sealed in plastic casing.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.Due to complex structure, bonding interface is many, easily at bonding interface, gap occurs, causes inner flux to reveal, and affects the security performance of product.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of simple in structure, the Thermal Cutoffs that sealing is good and manufacture method thereof.
For solving the problems of the technologies described above, Thermal Cutoffs provided by the invention comprises the two strip metal electrodes that are arranged in a linear, it has an interval in both ends in opposite directions, 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 is packaged in by described fusible alloy silk and with the connecting portion of two strip metal electrodes, this airtight cavity comprises box body and cover plate.
As a preferred embodiment of the present invention, described box body encloses in interior by described fusible alloy silk and with the connecting portion of two strip metal electrodes, and side is provided with an opening thereon.
As a preferred embodiment of the present invention, described cover plate links in opening part and the described box body of described box body.
As a preferred embodiment of the present invention, described cover plate is that relative box body is crowned.
As a preferred embodiment of the present invention, be filled with flux in described box body, it is layed on described fusible alloy silk.
As a preferred embodiment of the present invention, the fusing point of described flux is lower than the fusing point of described fusible alloy, the hydrochloride composition that it contains rosin, stearic acid and diethylamine.
As a preferred embodiment of the present invention, described box body and cover plate materials consist of the thermoplastic macromolecule resin, are selected from polyethylene, polypropylene, mylar, polyimide resin, polyamide, polyvinylidene fluoride resin, PET resin, PEN resin, PBT resin and/or Merlon.
The manufacture method of Thermal Cutoffs provided by the invention comprises the steps:
(1) both ends of a pair of strip metal electrode are in line relatively layout, and leave an interval between both ends, and put it in injection mold, utilize injection molding machine to inject macromolecule resin, obtain the box body that two ends embed the strip metal electrode, the top of described box body is provided with an opening;
(2) a fusible alloy silk is installed in to described interval, and it is welded in to the opposed end of described two strip metal electrodes, flux is covered on described fusible alloy silk simultaneously;
(3) separately get macromolecule resin small pieces as cover plate, by ultrasonic bonding, by it, the opening in described box body links, thereby described fusible alloy silk and scaling powder are packaged in described box body and cover plate.
As a preferred embodiment of the present invention, the manufacture method of Thermal Cutoffs provided by the invention comprises the steps:
(1) both ends of a pair of strip metal electrode are in line relatively layout, and leave an interval between both ends, and put it in injection mold, utilize injection molding machine to inject macromolecule resin, obtain the box body that two ends embed the strip metal electrode, the top of described box body is provided with an opening;
(2) a fusible alloy silk is installed in to described interval, and it is welded in to the opposed end of described two strip metal electrodes;
(3) separately get macromolecule resin small pieces as cover plate, described cover plate is crowned, be pre-charged with flux in this ridge, then by ultrasonic bonding, by it, the opening in described box body links, thereby described fusible alloy silk and scaling powder are packaged in described box body and cover plate.
Technique effect of the present invention is, by adopting injection mo(u)lding, obtains the airtight cavity of Thermal Cutoffs, makes the product hermeticity energy good, has simplified product structure, and manufacturing process is simple simultaneously, and production efficiency is high.
The accompanying drawing explanation
Below in conjunction with accompanying drawing and better embodiment, the present invention is further detailed explanation.
The structural representation that Fig. 1 is Thermal Cutoffs of the present invention;
Fig. 2 A to Fig. 2 D is the manufacture process schematic diagram of the first better embodiment of the manufacture method of Thermal Cutoffs of the present invention; And
Fig. 3 A to Fig. 3 D is the manufacture process schematic diagram of the second better embodiment of the manufacture method of Thermal Cutoffs of the present invention.
Embodiment
As shown in Figure 1, Thermal Cutoffs of the present invention, comprise that a pair of being in line connects by fusible alloy silk 3 between strip metal electrode 1,2, the two strip metal electrodes 1,2 of arranging, and is coated with flux 4 around described fusible alloy silk 3; The part that described fusible alloy silk 3, scaling powder 4 and strip metal electrode 1,2 are connected with fusible alloy silk 3 all is encapsulated in an airtight cavity.Described encapsulation cavity comprises box body 6 and cover plate 5.
Described box body and cover plate materials consist 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, can be also 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 refers to the wire that can fuse at a certain temperature.
Described flux 4 is selected than the low-melting material of fusible alloy silk 3, such as containing rosin, and the hydrochloride composition of stearic acid and diethylamine.
The manufacture method of Thermal Cutoffs of the present invention, comprise the steps:
(1) two strip metal electrodes are in line arrange and are placed in injection mold, utilize injection molding machine to inject macromolecule resin, obtain the box body that two ends embed the strip metal electrode; Wherein two metal electrode both ends are separated by a distance, so that weld the fusible alloy silk in the future;
(2) welding fusible alloy silk between two strip metal electrodes, and flux is covered above the fusible alloy silk; The welding of described fusible alloy silk and metal band-shaped electrode can adopt one of sweat soldering, resistance welded, ultrasonic bonding, laser welding or soft electron beam welding.
(3) separately get a slice macromolecule resin small pieces as cover plate, cover on said structure, ultrasonic bonding, by fusible alloy silk and scaling powder encapsulation.
At this example, flux can directly be coated on the fusible alloy silk, but is not limited to this, also can be pre-filled in the ridge of cover plate, then bridge welding is connected on box body.
The first step, as shown in Figure 2 A, the nickel strap that is 0.1mm by two thickness 21,22 is in line to arrange and is placed in mould, nickel strap size 2mm*10mm, the both ends 1mm of being separated by, then utilize injection molding machine to inject the PET resin, obtains the box body 26 that two ends embed the strip metal electrode;
Second step, as shown in Fig. 2 B, utilize the Lipowitz's alloy silk of length 2.5mm 23 to be laser-welded on nickel strap 21,22 terminations.
The 3rd step, as shown in Figure 2 C, the flux 24 that rosin, stearic acid and diethylamine hydrochloride are reconciled into, after heating and melting, drip around fusible alloy silk 23.
The 4th step, the PET resin sheet that to get thickness be 0.1mm, utilize rectangle small pieces that Presser Dashing makes 5mm * 3mm as cover plate 25, then utilizes the ultrasonic bonding mode, as shown in Figure 2 D, above being welded on, finally encapsulates.
The first step, as shown in Figure 3A, the nickel strap that is 0.1mm by two thickness 31,32 is in line to arrange and is placed in mould, nickel strap size 2mm*10mm, the both ends 1mm of being separated by, then utilize injection molding machine to inject the PET resin, obtains the box body 36 that two ends embed the strip metal electrode;
Second step, as shown in Figure 3 B, utilize the Lipowitz's alloy silk of length 2.5mm 33 to be laser-welded on nickel strap 31,32 terminations.
The 3rd step, as shown in Figure 3 C, the PET resin sheet that to get thickness be 0.1mm, utilize rectangle small pieces that Presser Dashing makes 5mm * 3mm as cover plate 35, and position compacting elliptic bulge section therebetween, and the protrusion height is 0.3mm.The flux 34 that rosin, stearic acid and diethylamine hydrochloride are reconciled into, after heating and melting, be filled in the ridge of cover plate 35.
The 3rd step, as shown in Figure 3 D, fill cover plate with facing down of flux, utilizes the ultrasonic bonding mode, above being welded on, finally encapsulates.
Below preferred embodiment of the present invention is illustrated, but the present invention is not limited to described embodiment, those of ordinary skill in the art also can make all modification be equal to or replacement under the prerequisite without prejudice to the invention spirit, and the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (2)
1. the manufacture method of a Thermal Cutoffs, is characterized in that, comprises the steps:
(1) both ends of a pair of strip metal electrode are in line relatively layout, and leave an interval between both ends, and put it in injection mold, utilize injection molding machine to inject macromolecule resin, obtain the box body that two ends embed the strip metal electrode, the top of described box body is provided with an opening;
(2) a fusible alloy silk is installed in to described interval, and it is welded in to the opposed end of described two strip metal electrodes, flux is covered on described fusible alloy silk simultaneously;
(3) separately get macromolecule resin small pieces as cover plate, by ultrasonic bonding, by it, the opening in described box body links, thereby described fusible alloy silk and scaling powder are packaged in described box body and cover plate.
2. the manufacture method of a Thermal Cutoffs, is characterized in that, comprises the steps:
(1) both ends of a pair of strip metal electrode are in line relatively layout, and leave an interval between both ends, and put it in injection mold, utilize injection molding machine to inject macromolecule resin, obtain the box body that two ends embed the strip metal electrode, the top of described box body is provided with an opening;
(2) a fusible alloy silk is installed in to described interval, and it is welded in to the opposed end of described two strip metal electrodes;
(3) separately get macromolecule resin small pieces as cover plate, described cover plate is crowned, be pre-charged with flux in this ridge, then by ultrasonic bonding, by it, the opening in described box body links, thereby described fusible alloy silk and scaling powder are packaged in described box body and cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100489996A CN101859664B (en) | 2009-04-09 | 2009-04-09 | Temperature fuse and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100489996A CN101859664B (en) | 2009-04-09 | 2009-04-09 | Temperature fuse and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101859664A CN101859664A (en) | 2010-10-13 |
| CN101859664B true CN101859664B (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100489996A Active CN101859664B (en) | 2009-04-09 | 2009-04-09 | Temperature fuse and manufacturing method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102769120B (en) * | 2012-07-24 | 2016-03-30 | 深圳市雄韬电源科技股份有限公司 | Battery pack connecting device, battery system and electric equipment |
| CN105161356A (en) * | 2015-08-24 | 2015-12-16 | 兴勤（常州）电子有限公司 | Temperature fuse module |
| CN113436944A (en) * | 2021-07-05 | 2021-09-24 | 东莞市贝特电子科技股份有限公司 | Temperature fuse with novel sealing structure and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334580A (en) * | 2000-07-21 | 2002-02-06 | 松下电器产业株式会社 | Temp. fuse, battery and temp. fuse mfg. method |
| CN101299404A (en) * | 2008-04-17 | 2008-11-05 | 上海神沃电子有限公司 | Temperature safety wire and method for manufacturing the same |
| CN201402776Y (en) * | 2009-04-09 | 2010-02-10 | 上海神沃电子有限公司 | Strip-shaped thermal fuse |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004127569A (en) * | 2002-09-30 | 2004-04-22 | Anzen Dengu Kk | Lead conductor for thin thermal fuse and thin thermal fuse |
| US7659804B2 (en) * | 2004-09-15 | 2010-02-09 | Littelfuse, Inc. | High voltage/high current fuse |
-
2009
- 2009-04-09 CN CN2009100489996A patent/CN101859664B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334580A (en) * | 2000-07-21 | 2002-02-06 | 松下电器产业株式会社 | Temp. fuse, battery and temp. fuse mfg. method |
| CN101299404A (en) * | 2008-04-17 | 2008-11-05 | 上海神沃电子有限公司 | Temperature safety wire and method for manufacturing the same |
| CN201402776Y (en) * | 2009-04-09 | 2010-02-10 | 上海神沃电子有限公司 | Strip-shaped thermal fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101859664A (en) | 2010-10-13 |
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Effective date of registration: 20240318 Address after: Block A, Building 1, No. 180 Chengye Road, Sheshan Town, Songjiang District, Shanghai, February 2016 Patentee after: SHANGHAI KETER NEW MATERIALS CO.,LTD. Country or region after: China Patentee after: SHANGHAI SHENWO ELECTRONICS CO.,LTD. Address before: 201108, No. 4, building 123, 1165 lane, Jin Du Road, Shanghai, Minhang District Patentee before: SHANGHAI SHENWO ELECTRONICS CO.,LTD. Country or region before: China |
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