CN103021598A - Over-current protecting component - Google Patents
Over-current protecting component Download PDFInfo
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- CN103021598A CN103021598A CN2011102915590A CN201110291559A CN103021598A CN 103021598 A CN103021598 A CN 103021598A CN 2011102915590 A CN2011102915590 A CN 2011102915590A CN 201110291559 A CN201110291559 A CN 201110291559A CN 103021598 A CN103021598 A CN 103021598A
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Abstract
The invention provides an over-current protecting component. The over-current protecting component comprises a resistance element, an insulating layer, an electrode layer and at least one conductive connecting member, wherein the resistance element contains a first electrode foil, a second electrode foil and a positive temperature coefficient material layer which is stacked between the first electrode foil and the second electrode foil; the insulating layer is arranged on the surface of the first electrode foil; the electrode layer is arranged on the surface of the insulating layer; the conductive connecting member at least penetrates through the electrode layer, the insulating layer and the first electrode foil so as to electrically connect the electrode layer with the first electrode foil; the conductive connecting member is electrically isolated from the second electrode foil; and either the first electrode foil or the second electrode foil is used for being electrically connected with the surface of a protective circuit module (PCM), and the other one of the first and second electrode foils is used for being electrically connected with an electrode terminal of a battery to be protected.
Description
Technical field
The present invention relates to a kind of passive component, relate in particular to a kind of over-current protecting element.
Background technology
Existing positive temperature coefficient (Positive Temperature Coefficient; PTC) resistance value of element is worked as sharp to the reacting phase of variations in temperature.When PTC element during in normal behaviour in service, its resistance can be kept utmost point low value and make circuit be able to normal operation.But when overcurrent occurs or crosses the phenomenon of high temperature and when making temperature rise to a critical temperature, its resistance value can the moment spring to a high resistance state (for example 10
4More than the ohm) and excessive electric current is oppositely offseted, to reach the purpose of protection battery or circuit element.
With reference to Fig. 1, US Patent No. 6,713,210 disclose the board structure of circuit of a tool overcurrent protection.One IC element 2 is arranged at a protective circuit module (Protective Circuit Module; PCM) on 1,3 of PTC elements are fixedly arranged on this PCM 1 surface in the surface mount mode.This PTC element 3 is a stepped construction, a ptc layer 6 be arranged at nickel foil (or nickel plating Copper Foil) 7,7 ' between, this nickel foil 7,7 ' as the electrode foil of ptc layer 6.One nickel sheet 4 is fixed in the upper surface of this nickel foil 7 as the usefulness of external electrode.Nickel foil 7 ' lower surface (namely adjacent to PCM 1 surface) weld in addition a copper electrode 5, with respect to 3 one-tenth one symmetrical structures of PTC element.
Must bear larger voltage, electric current when considering follow-up spot welding (spot welding), this PTC element 3 can't directly carry out spot welding, and need in advance in conjunction with this nickel sheet 4, its thickness preferably needs more than the 0.3mm approximately, destroy when avoiding follow-up spot welding the nickel foil 7,7 of PTC element '.Yet this nickel sheet 4 need to be incorporated in artificial mode this PTC element usually, is unfavorable for a large amount of the manufacturing and the reduction cost.
Summary of the invention
The purpose of this invention is to provide a kind of over-current protecting element, can be applicable to the protective circuit module (PCM) of battery.This over-current protecting element can utilize the modes such as surface mount, reflow or spot welding to carry out combination with PCM or external electrode sheet, makes in a large number and be suitable for mechanization, and then can effectively reduce manufacturing time and cost.
The over-current protecting element of one embodiment of the invention comprises resistive element, insulating barrier, electrode layer and at least one conducting connecting part.Resistive element comprises one first electrode foil, one second electrode foil and is stacked at PTC material layer between this first electrode foil and the second electrode foil.Insulating barrier is located at this first electrode foil surface.Electrode layer is located at the surface of this insulating barrier.Conducting connecting part runs through this electrode layer, insulating barrier and the first electrode foil at least, in order to be electrically connected this electrode layer and the first electrode foil.This conducting connecting part and the second electrode foil electrical isolation.One in this first electrode foil and the second electrode foil is used for electrical connection PCM surface, and another one is used for the electrode tip of electrical connection wish protection battery.
Among one embodiment, over-current protecting element comprises the weld pad of being located at the second electrode foil surface in addition, and this second electrode foil surface beyond in this weld pad zone arranges anti-welding enamelled coating (Solder Mask).In the present embodiment, over-current protecting element can utilize this weld pad to be welded in the surface of PCM.Electrode layer can reflow or the spot welding mode connect the external electrode layer.
Among the another embodiment, the electrode layer of over-current protecting element can utilize the modes such as surface mount or reflow to be connected in the PCM surface.The second electrode foil can be Copper Foil, and its surface can form the tin metal layer, can utilize reflow or spot welding mode to connect the external electrode layer.
Over-current protecting element of the present invention can be applicable to the protective circuit module (PCM) of battery.This over-current protecting element can utilize the modes such as surface mount, reflow or spot welding to carry out combination with PCM or external electrode sheet, makes in a large number and be suitable for mechanization, and then can effectively reduce manufacturing time and cost.
Description of drawings
Fig. 1 is the application schematic diagram of existing PTC element on PCM.
Fig. 2 A to 2C is the over-current protecting element schematic diagram of first embodiment of the invention.
Fig. 3 A to 3C is the over-current protecting element schematic diagram of second embodiment of the invention.
Fig. 4 A to 4B is the over-current protecting element schematic diagram of third embodiment of the invention.
Fig. 5 A to 5B is the over-current protecting element schematic diagram of fourth embodiment of the invention.
Fig. 6 A to 6C is the application schematic diagram of over-current protecting element of the present invention.
Wherein, description of reference numerals is as follows:
1 protective circuit module
2 IC elements
3 PTC elements
4 nickel sheets
5 copper electrodes
6 ptc layers
7,7 ' nickel foil
10,30,40,50 over-current protecting elements
11 resistive elements
12 first electrode foils
13 PTC material layers
14 second electrode foils
15 insulating barriers
16 electrode layers
17 anti-welding enamelled coatings
18 conductive through holes
19,29 conducting connecting parts
20 weld pads
25 semicircle conductive holes
41 filling perforation glue
42,45 tin metal layers
43,44 anti-welding enamelled coatings
60 PCM
61 external electrode sheets
Embodiment
Fig. 2 A to 2C is the schematic diagram of the over-current protecting element of first embodiment of the invention.Fig. 2 A is the stereochemical structure of over-current protecting element 10, and Fig. 2 B is along the generalized section of 1-1 hatching among Fig. 2 A.Fig. 2 C is the bottom view of over-current protecting element 10.Over-current protecting element 10 mainly comprises resistive element 11, insulating barrier 15, electrode layer 16 and conducting connecting part 19.Resistive element 11 comprise the first electrode foil 12, the second electrode foil 14 and be stacked at the first electrode foil 12 and the second electrode foil 14 between PTC material layer 13.Insulating barrier 15 is located at the first electrode foil 12 surfaces, and electrode layer 16 is located at the surface of insulating barrier 15, and wherein resistive element 11, insulating barrier 15 and electrode layer 16 form stepped constructions.
Conducting connecting part 19 is penetrating electrode layer 16, insulating barrier 15 and the first electrode foil 12 at least, in order to be electrically connected electrode layer 16 and the first electrode foil 12.Should be noted that conducting connecting part 19 and the second electrode foil 14 are electrical isolation.
In the present embodiment, conducting connecting part 19 is coated with the conductive channel 18 of conductive layer for the surface.Further it, the conductive channel of present embodiment 18 is for running through the conductive hole of over-current protecting element 10 centre.
During practical application, the second electrode foil 14 can utilize surface mount (Surface Mounting) mode to be fixed in the PCM surface, electrode layer 16 can electroplate the mode of thickening or select thickness greater than the thicker Copper Foil of 50 μ m in the mode of spot welding in conjunction with external electrode sheet (not shown), or in electrode layer 16 surfaces the metal electrode (not shown) is set in addition and uses as follow-up manufacturing process.Among another embodiment, for asking better for quality and convenience, the bottom surface of over-current protecting element 10 can be arranged at the weld pad 20 on the second electrode foil 14 surfaces in addition, and with the anti-welding enamelled coating 17 that insulate of the second electrode foil 14 surface-coateds beyond weld pad 20 zones.In the present embodiment, weld pad 20 conducting connecting part 19 both sides that are placed in.Preferably, the thickness of weld pad 20 is equal to or is slightly larger than the thickness of anti-welding enamelled coating 17, thereby weld pad 20 can be equal to or slightly protrude from the surface of anti-welding enamelled coating 17.Base this, can utilize weld pad 20 as the welding interfaces, and over-current protecting element 10 is fixedly arranged on the PCM surface.
Among one embodiment, electrode layer 16 can be selected Copper Foil, nickel foil or other metal formings, uses as reflow or spot welding.Aforementioned Copper Foil also can be in plating nickel on surface, with anti-oxidation.In addition, electrode layer 16 also can select the tin-coated copper paper tinsel as the follow-up usefulness that metal electrode is set in addition in the surface.The material of weld pad 20 can be selected tin or other metals.Insulating barrier 15 can be selected polypropylene, glass fibre or epoxy resin etc.
Fig. 3 A to 3C is the schematic diagram of the over-current protecting element of second embodiment of the invention.Fig. 3 A is the stereochemical structure of over-current protecting element 30, and Fig. 3 B is along the generalized section of 2-2 hatching among Fig. 3 A.Fig. 3 C is the bottom view of over-current protecting element 30.The over-current protecting element 10 of the basic structure of over-current protecting element 30 and the first embodiment is roughly the same, and difference is in: the conductive through hole 18 semicircle conductive hole 25 with over-current protecting element 30 two sides and substitutes.The surface of semicircle conductive hole 25 can plate conductive layer to form conducting connecting part 29.Conducting connecting part 29 is penetrating electrode layer 16, insulating barrier 15 and the first electrode foil 12 at least, in order to be electrically connected electrode layer 16 and the first electrode foil 12.Should be noted that conducting connecting part 29 and the second electrode foil 14 are electrical isolation.
Above-mentioned conducting connecting part 19,29 also can adopt a plurality of or other patterns, is equal to effect and provide.
Fig. 4 A to Fig. 4 B is the schematic diagram of the over-current protecting element 40 of third embodiment of the invention.Utilize electrode layer 16 in conjunction with the external electrode sheet compared to the over-current protecting element 10 shown in Fig. 2 A to 2C; and utilize weld pad 20 to connect the PCM surface; over-current protecting element 40 is similar is inverted element; utilize electrode layer 16 to be connected in the PCM surface with surface mount or reflow mode; and the second electrode foil 14 generally can be Copper Foil; and can be in electroplating surfaces with tin metal level 42, and utilize anti-welding enamelled coating 43 (being located at conducting connecting part 19 1 ends of element central authorities) to carry out the electrical isolation of 42 on conducting connecting part 19 and the second electrode foil 14 and tin metal layer.Tin metal layer 42 can connect external electrode sheet (not shown), and it can be connected to the electrode tip of battery.In fact, the effect of the combination of the second electrode foil 14 and tin metal layer 42 namely is equivalent to electrode layer 16, substitutes and be able to single Copper Foil, nickel foil, nickel plating Copper Foil or other metal formings.In addition, the emptying aperture of 19 of conducting connecting parts can be inserted insulation filling perforation glue 41.
Fig. 5 A to 5B is the schematic diagram of the over-current protecting element 50 of fourth embodiment of the invention.Utilize electrode layer 16 in conjunction with the external electrode sheet compared to the over-current protecting element 30 shown in Fig. 3 A to 3C; and utilize weld pad 20 to connect the PCM surface; over-current protecting element 50 is similar is inverted element; utilize electrode layer 16 to be connected in the PCM surface with surface mount or reflow mode; and the second electrode foil 14 generally can be Copper Foil; and present embodiment is in the second electrode foil 14 electroplating surfaces with tin metal levels 45, and utilizes anti-welding enamelled coating 44 to carry out the electrical isolation of 45 on conducting connecting part 29 and the second electrode foil 14 and tin metal layer.Tin metal layer 45 can reflow or the spot welding mode connect external electrode sheet (not shown), it can be connected to the electrode tip of battery.
The semicircle conducting connecting part 29 of Fig. 5 A and 5B is arranged at elements on either side, and it also can be arranged at four corners of element (1/4 circle conducting connecting part), also can adopt the conducting connecting part of a plurality of or other patterns, is equal to effect and provide.
By the design of previous embodiment, over-current protecting element 10,30,40 and 50 one sides are fixed on the PCM, and another side then can connect the external electrode sheet.With reference to Fig. 6 A, as an example of over-current protecting element 40 example (can element 10,30,50 substitute), it be fixed on the PCM 60, and the other end then connects external electrode sheet 61.This external electrode sheet 61 generally can be nickel sheet or other sheet metals, can connect the electrode tip of the secondary cells such as lithium ion or lithium macromolecule battery.External electrode sheet 61 can be combined with the electrode of over-current protecting element 40 or battery with reflow or spot welding mode.
The external electrode sheet 61 of Fig. 6 A is strip, and it also can be complied with the design of battery and be various other shapes, and the bending of for example L-type of Fig. 6 B, or Fig. 6 C is conveniently to be connected to the electrode tip of battery.
Traditional PTC element be because can't directly utilizing spot welding to be combined with nickel sheet or other sheet metals, and needs carry out combination in the mode of tin cream reflow, and reflow (reflow) temperature often needs greater than 230 ℃, and probably will affect the healing properties of PTC element.Weld because of utilisation point during over-current protecting element of the present invention welding external electrode, it only need consider curing (curing) temperature of the thermosetting plastic that element is contained, and it is usually less than 200 ℃, and is unlikely the healing properties that affects the PTC element.
Technology contents of the present invention and technical characterstic disclose as above, yet those skilled in the art still may be based on teaching of the present invention and announcements and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by following claim scope.
Claims (18)
1. an over-current protecting element is applied to a protective circuit module, it is characterized in that, comprising:
One resistive element comprises one first electrode foil, one second electrode foil and is stacked at PTC material layer between this first electrode foil and the second electrode foil;
One insulating barrier is located at this first electrode foil surface;
One electrode layer is located at the surface of this insulating barrier; And
At least one conducting connecting part runs through this electrode layer, this insulating barrier and this first electrode foil at least, in order to being electrically connected this electrode layer and this first electrode foil, and this conducting connecting part and this second electrode foil electrical isolation;
Wherein the one in this first electrode foil and the second electrode foil is used for this protective circuit Modular surface of electrical connection, and another one is used for the electrode tip of electrical connection battery.
2. according to claim 1 over-current protecting element is characterized in that this second electrode foil is welded in the interface of this protective circuit Modular surface as this over-current protecting element.
3. according to claim 1 over-current protecting element is characterized in that, this conducting connecting part is coated with the conductive channel of conductive layer for the surface.
4. according to claim 1 over-current protecting element is characterized in that this conducting connecting part runs through the conductive hole of this over-current protecting element.
5. according to claim 1 over-current protecting element is characterized in that this conducting connecting part is located at the semicircle conductive hole of this over-current protecting element side.
6. according to claim 1 over-current protecting element is characterized in that, also comprises the weld pad of being located at this second electrode foil surface, is welded in the interface of this protective circuit Modular surface as this over-current protecting element.
7. according to claim 6 over-current protecting element is characterized in that, this weld pad conducting connecting part both sides that are placed in.
8. according to claim 6 over-current protecting element is characterized in that, also comprises anti-welding enamelled coating, is located at this second electrode foil surface beyond this weld pad zone.
9. according to claim 8 over-current protecting element is characterized in that this weld pad is equal to or protrudes from the surface of anti-welding enamelled coating.
10. according to claim 1 over-current protecting element is characterized in that this over-current protecting element is to utilize this second electrode foil to be fixed in the surface of this protective circuit module in the surface mount mode.
11. over-current protecting element according to claim 1 is characterized in that, also comprises the anti-welding enamelled coating of being located at this conducting connecting part one end, is used for this second electrode foil of electrical isolation and this conducting connecting part.
12. over-current protecting element according to claim 11 is characterized in that, this anti-welding enamelled coating is positioned at central authorities or the both sides of this over-current protecting element.
13. over-current protecting element according to claim 1 is characterized in that, also comprises the tin metal layer of being located at this second electrode foil surface, is used for connecting the usefulness of external electrode sheet.
14. over-current protecting element according to claim 13 is characterized in that, this external electrode sheet is to utilize reflow or spot welding mode to be connected in this tin metal layer.
15. over-current protecting element according to claim 1 is characterized in that, this over-current protecting element is to utilize this electrode layer to be fixed in the surface of this protective circuit module with surface mount or reflow mode.
16. over-current protecting element according to claim 1 is characterized in that, also comprises an external electrode sheet, is electrically connected this first electrode foil or this second electrode foil, and is electrically connected in this electrode tip of this battery.
17. over-current protecting element according to claim 16 is characterized in that, this external electrode sheet is connected in this electrode layer with reflow or spot welding mode.
18. over-current protecting element according to claim 16 is characterized in that, this external electrode sheet be shaped as strip, Curved or L shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110291559.0A CN103021598B (en) | 2011-09-26 | 2011-09-26 | Over-current protecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110291559.0A CN103021598B (en) | 2011-09-26 | 2011-09-26 | Over-current protecting element |
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| CN103021598A true CN103021598A (en) | 2013-04-03 |
| CN103021598B CN103021598B (en) | 2016-05-25 |
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| CN201110291559.0A Expired - Fee Related CN103021598B (en) | 2011-09-26 | 2011-09-26 | Over-current protecting element |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356170A (en) * | 2015-07-16 | 2017-01-25 | 聚鼎科技股份有限公司 | overcurrent protection element |
| CN107527928A (en) * | 2016-06-21 | 2017-12-29 | 胜丽国际股份有限公司 | Optical module encapsulating structure |
| CN108389669A (en) * | 2018-01-26 | 2018-08-10 | 上海神沃电子有限公司 | A kind of preparation method of double-pressure type PTC self- recoverage safety devices |
| CN113614860A (en) * | 2019-04-17 | 2021-11-05 | Koa株式会社 | Current detection resistor |
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| US20020146547A1 (en) * | 2001-04-06 | 2002-10-10 | Inpaq Technology Co. Ltd. | End electrode structure of surface adhesive over-current protection device and its manufacturing process |
| CN2575817Y (en) * | 2002-08-20 | 2003-09-24 | 聚鼎科技股份有限公司 | Arc contactor module |
| JP2004172502A (en) * | 2002-11-21 | 2004-06-17 | Hokuriku Electric Ind Co Ltd | Resistor for surface-mounting |
| CN101295570A (en) * | 2007-04-25 | 2008-10-29 | 聚鼎科技股份有限公司 | Protection circuit board and overcurrent protection element thereof |
| CN101414499A (en) * | 2007-10-19 | 2009-04-22 | 佳邦科技股份有限公司 | Multi-layer type over-current and over-temperature protection structure, and preparation method thereof |
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2011
- 2011-09-26 CN CN201110291559.0A patent/CN103021598B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020146547A1 (en) * | 2001-04-06 | 2002-10-10 | Inpaq Technology Co. Ltd. | End electrode structure of surface adhesive over-current protection device and its manufacturing process |
| CN2575817Y (en) * | 2002-08-20 | 2003-09-24 | 聚鼎科技股份有限公司 | Arc contactor module |
| JP2004172502A (en) * | 2002-11-21 | 2004-06-17 | Hokuriku Electric Ind Co Ltd | Resistor for surface-mounting |
| CN101295570A (en) * | 2007-04-25 | 2008-10-29 | 聚鼎科技股份有限公司 | Protection circuit board and overcurrent protection element thereof |
| CN101414499A (en) * | 2007-10-19 | 2009-04-22 | 佳邦科技股份有限公司 | Multi-layer type over-current and over-temperature protection structure, and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356170A (en) * | 2015-07-16 | 2017-01-25 | 聚鼎科技股份有限公司 | overcurrent protection element |
| CN106356170B (en) * | 2015-07-16 | 2019-01-29 | 聚鼎科技股份有限公司 | Overcurrent protection element |
| CN107527928A (en) * | 2016-06-21 | 2017-12-29 | 胜丽国际股份有限公司 | Optical module encapsulating structure |
| CN108389669A (en) * | 2018-01-26 | 2018-08-10 | 上海神沃电子有限公司 | A kind of preparation method of double-pressure type PTC self- recoverage safety devices |
| CN108389669B (en) * | 2018-01-26 | 2019-08-20 | 上海神沃电子有限公司 | A kind of preparation method of double-pressure type PTC self- recoverage safety device |
| CN113614860A (en) * | 2019-04-17 | 2021-11-05 | Koa株式会社 | Current detection resistor |
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| CN103021598B (en) | 2016-05-25 |
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Granted publication date: 20160525 Termination date: 20210926 |