CN203134738U - An over-current over-voltage protection element - Google Patents
An over-current over-voltage protection element Download PDFInfo
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- CN203134738U CN203134738U CN 201320176198 CN201320176198U CN203134738U CN 203134738 U CN203134738 U CN 203134738U CN 201320176198 CN201320176198 CN 201320176198 CN 201320176198 U CN201320176198 U CN 201320176198U CN 203134738 U CN203134738 U CN 203134738U
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- electrode
- over
- voltage protection
- protection element
- middle electrode
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Abstract
The utility model discloses an over-current over-voltage protection element. The over-current over-voltage protection element comprises a bearing plate, a melting body, a top cover plate, and end face electrodes. A middle electrode on the bearing plate is divided into at least three isolated areas and is covered with the melting body so that electric connection is formed among the isolated areas of the middle electrode. The top cover is a groove structure with an opening facing the bearing plate. A hollow cavity is formed by bonding the opening end of the top cover plate and the bearing plate. The end face electrodes are disposed on the two sides of the bearing plate and the two sides of the top cover plate. Electric connection is formed among a top electrode, the middle electrode, and a bottom electrode. The over-current over-voltage protection element using high-temperature-resistant high molecular material has good heat isolating effect while not influencing the heat-resistant performance of the element. By a vacuum sputtering, a vacuum vapor plating, or a vacuum electroplating mode, the melting body is directly connected with the electrodes. And after heated, the melting body does not partially melt and does not generate drifting. A gap is arranged over the melting body so that melted melting body can be well adsorbed so as not to form a protruding tin hill.
Description
Technical field
The utility model belongs to over-current over-voltage protection element field, is specifically related to a kind of structure for the over-current over-voltage protection element and manufacture method.
Background technology
Be equipped on the protection component of secondary cell, need possess the overcurrent over-voltage protection function, existing overcurrent overvoltage protection element is at the other heater that is provided with of low-temperature melt, its mechanism of action is: first kind of situation, low-temperature melt generates heat because of himself and fuses when electric current is excessive in the circuit, and circuit disconnects; Second kind of situation, when battery charging voltage was excessive, the release current of battery own made the heater heating by heater, and the heat that heater sends reaches the fusing point of low-temperature melt, the low-temperature melt fusion that connects electrode is disconnected, thereby cut off circuit.
As described in patent CN102362328A and CN102468645A, the both adopts pottery as substrate, and pottery has good heat endurance, but itself also has good thermal conductivity.When protection component process infrared ray reflow soldering, be positioned at the easy melted by heat of low-melting-point metal layer on the substrate, be unfavorable for operation; In addition, heater also is positioned on the ceramic substrate, and the heat part that heater sends has been passed to ceramic substrate, postpones the fusing time of low-melting alloy; Melt is arranged on the electrode, utilizes tin cream welding, arc welding, ultrasonic waves welding, laser welding, hot pressing welding or welding to make low-melting alloy sheet and electrode ways of connecting to the having relatively high expectations of equipment by the low-melting alloy sheet, is unfavorable for producing in enormous quantities.
As described in patent CN102362328A; it mainly promotes melting the absorption dynamics of back low-melting alloy by the mode that adopts radial tin paste layer; and patent CN102468645A is described; mainly improve the absorption dynamics of low-melting alloy by bridging structure; yet toward today light, thin, short, little trend development, obvious is not desirable protected mode for present protection component.
The utility model content
At the problems referred to above that over-current over-voltage protection element in the prior art exists, the utility model provides a kind of over-current over-voltage protection element and manufacture method thereof.
The technical solution of the utility model is:
A kind of over-current over-voltage protection element comprises loading plate, melt, upper cover plate and end electrode:
Described loading plate comprises middle electrode, bottom electrode, resistive layer, first insulating barrier, second insulating barrier, electrode separation is at least three isolated zones in described, be provided with resistive layer and resistance electrode between middle electrode and the bottom electrode, be provided with first insulating barrier between bottom electrode and the resistive layer, be provided with second insulating barrier between middle electrode and the resistive layer;
On the electrode, the zone that electrode isolates each other in making formed and is electrically connected during described melt was covered in;
Described upper cover plate is that opening is towards the groove structure of loading plate, comprise openend and the blind end relative with openend, described openend and loading plate adhesive bond form a cavity, and the outside of described blind end is provided with top electrode, and the inboard of described blind end is provided with the layer of fluxing;
Described end electrode is arranged at loading plate and upper cover plate both sides, makes to form between top electrode, middle electrode and the bottom electrode to be electrically connected.
Further, described fluxing is provided with the gap between layer and the melt, is provided with flux in the gap.
Further, described melt comprises the first metal layer and second metal level, between the zone that described second metal level is laid on the middle electrode continuously and middle electrode isolates each other, the zone that electrode isolates each other in making forms electrical connection, and described the first metal layer is arranged on second metal level.
Further, described melt comprises the first metal layer and solder(ing) paste, and described the first metal layer is layer structure, and the first metal layer is connected with the zone that middle electrode isolates each other by solder(ing) paste.
Further, described first insulating barrier and second insulating barrier are resistant to elevated temperatures high-molecular organic material.
Further, the openend of described upper cover plate and loading plate are bonding by adhesive.
Further, the described layer of fluxing is metal flat.
A kind of over-current over-voltage protection element arrays comprises several above-mentioned over-current over-voltage protection elements.
A kind of manufacture method of above-mentioned over-current over-voltage protection element arrays specifically comprises the steps:
(a) preparation loading plate: form the resistive element array a two-sided side that is covered with the substrate of metal forming, described resistive element array comprises resistance electrode array and electric resistance array, opposite side at substrate forms the bottom electrode pattern, attach second insulating barrier in resistive element array one side then, and attach Copper Foil at second insulating barrier, electrod-array in Copper Foil forms forms melt at middle electrode then then;
(b) preparation upper cover plate: upper cover plate one side forms groove array, and forms layer array of fluxing in groove, and the opposite side of groove forms top electrode;
(c) combination: be coated with flux at melt, at upper cover plate and loading plate bond site coating binder, and with upper cover plate and the bonding inner array of cavities that forms of loading plate contraposition, make adhesive solidification;
(d) form end electrode: form via-hole array in X and Y-direction based on cavity, and form end electrode, top electrode, middle electrode and bottom electrode are formed be electrically connected;
(e) cut apart moulding: completed via-hole array substrate is cut apart, formed single over-current over-voltage protection element.
Further, adopt the vacuum sputtering method to form the resistive element array in the step (a).
Further, adopt lithographic method to form bottom electrode in the step (a).
Further, the method that forms melt in the step (a) is: adopt the mode of vacuum sputtering at middle electrode deposition second metal level earlier, and then adopt the mode of electroplating to electroplate the ground floor metal level.
Further, the preparation process of upper cover plate is specially in the step (b): prepare a double-sided copper-clad substrate and an insulated substrate; Adopt the mode of machinery or punching press to carry out via-hole array at insulated substrate; Form top electrode in double-sided copper-clad substrate one side, form the layer of fluxing at opposite side; At the binding site coating adhesive of double-sided copper-clad substrate and insulated substrate, contraposition accurately back is bonding then, and adhesive is solidified.
Further, the preparation process of upper cover plate is specially in the step (b): the copper-clad base plate of preparing a single face; Adopt the machining mode to form groove; In groove, form the layer of fluxing then; Form top electrode in a unnotched side then.
The beneficial effects of the utility model are:
1, adopts high temperature polymeric materials, not influencing the stable on heating while of protection component, good effect of heat insulation is also arranged, make protection component can be smoothly through reflow soldering and melt does not fuse, and when reaching operating current or operation voltage, action can take place and fuse in melt fast;
2, melt does not re-use the mode of welding, and adopts vacuum sputtering, and vacuum evaporation or plating mode directly are connected melt with electrode, fusing that can the part melt after being heated and drifting about;
3, after the melt layer fusing, often the trend of the direction expansion vertical with the melt face is greater than the trend toward planar extension, therefore the utility model is set up the gap above melt, can make fusing after melt well absorbed by the gap rather than form the Xishan of arching upward;
4, be provided with flux in the gap, capillary effect can well be adsorbed flux and can not run off because of fusing.
Description of drawings
Fig. 1 is the three-dimensional effect diagram of the protection component of the utility model first embodiment;
Fig. 2 is the cross-sectional schematic (along the Y-Y direction of Fig. 1) of the protection component of the utility model first embodiment;
Fig. 3 is for making the design sketch after melt fuses after the protection component work of the utility model first embodiment;
Fig. 4 is the schematic diagram after the utility model first embodiment resistance electrode forms;
Fig. 5 is the schematic diagram after the utility model first embodiment bottom electrode forms;
Fig. 6 is the schematic diagram after the utility model first embodiment resistance forms;
Fig. 7 is the schematic diagram after electrode forms among the utility model first embodiment;
Fig. 8 forms the back schematic diagram for the utility model first embodiment melt;
Fig. 9 is the structure for amplifying schematic diagram of a part among Fig. 8;
Figure 10 is ventilating hole plate schematic diagram in the utility model first embodiment loam cake manufacturing process;
Figure 11 is top electrode place plate schematic diagram in the utility model first embodiment loam cake manufacturing process;
Figure 12 is the aspect schematic diagram of fluxing after the utility model first embodiment upper cover plate is finished;
Figure 13 is the pole-face schematic diagram that powers on after the utility model first embodiment upper cover plate is finished;
Figure 14 is the utility model first embodiment upper cover plate and loading plate combination back schematic diagram;
Figure 15 finishes the effect schematic diagram after electroplating for holing in the utility model first embodiment process;
Figure 16 is the schematic diagram of print solder paste figure on the electrode in the loading plate among the utility model second embodiment;
Figure 17 is schematic diagram after low-melting alloy welds on the loading plate among the utility model second embodiment;
Figure 18 is the structure for amplifying schematic diagram of b part among Figure 17;
Figure 19 is the cross-sectional schematic of the protection component of the utility model second embodiment.
Among the figure: 1, middle electrode; 2, bottom electrode; 3, resistive layer; 4, first insulating barrier; 5, second insulating barrier; 6, the first metal layer; 7, upper cover plate; 8, end electrode; 9, resistance electrode; 10, top electrode; 11, the layer of fluxing; 12, flux; 13, gap; 14, the first virtual dividing line; 15, the second virtual dividing line; 16, second metal level; 17, adhesive; 18, solder(ing) paste; 19, low-melting alloy sheet.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
A kind of over-current over-voltage protection element described in the utility model comprises loading plate, melt, upper cover plate 7 and end electrode 8:
Loading plate comprises middle electrode 1, bottom electrode 2, resistive layer 3, first insulating barrier 4, second insulating barrier 5, electrode 1 is divided at least three isolated zones in described, be provided with resistive layer 3 and resistance electrode 9 between middle electrode 1 and the bottom electrode 2, be provided with first insulating barrier 4 between bottom electrode 2 and the resistive layer 3, be provided with second insulating barrier 5 between middle electrode 1 and the resistive layer 3;
On the electrode 1, the zone that electrode 1 isolates each other in making formed and is electrically connected during melt was covered in;
End electrode 8 is arranged at loading plate and upper cover plate 7 both sides, makes to form between top electrode 10, middle electrode 1 and the bottom electrode 2 to be electrically connected.
First kind of embodiment of a kind of over-current over-voltage protection element described in the utility model is: described melt comprises the first metal layer 6 and second metal level 16; between the zone that described second metal level 16 is laid on the middle electrode 1 continuously and middle electrode 1 isolates each other; the zone that electrode 1 isolates each other in making forms and is electrically connected, and described the first metal layer 6 is arranged on second metal level 16.
Second kind of embodiment of a kind of over-current over-voltage protection element described in the utility model is: described melt comprises solder(ing) paste 18 and low-melting alloy sheet 19; described low-melting alloy sheet 19 is laminar, and low-melting alloy sheet 19 is connected with the zone that middle electrode isolates each other by solder(ing) paste 18.
The three-dimensional effect diagram of the protection component of the utility model first embodiment as shown in Figure 1; The cutaway view of the protection component of the utility model first embodiment (along the Y-Y direction of Fig. 1) as shown in Figure 2; Make after the protection component work of the utility model first embodiment after the melt fusing design sketch as shown in Figure 3.
The manufacture method of a kind of above-mentioned over-current over-voltage protection element arrays described in the utility model specifically comprises the steps:
(a) preparation loading plate: form the resistive element array a two-sided side that is covered with the substrate of metal forming, described resistive element array comprises resistance electrode array and electric resistance array, opposite side at substrate forms the bottom electrode pattern, attach second insulating barrier in resistive element array one side then, and attach Copper Foil at second insulating barrier, electrod-array in Copper Foil forms forms melt at middle electrode then then;
(b) preparation upper cover plate: upper cover plate one side forms groove array, and forms layer array of fluxing in groove, and the opposite side of groove forms top electrode;
(c) combination: be coated with flux at melt, at upper cover plate and loading plate bond site coating binder, and with upper cover plate and the bonding inner array of cavities that forms of loading plate contraposition, make adhesive solidification;
(d) form end electrode: form via-hole array in X and Y-direction based on cavity, and form end electrode, top electrode, middle electrode and bottom electrode are formed be electrically connected;
(e) cut apart moulding: completed via-hole array substrate is cut apart, formed single over-current over-voltage protection element.
Below, based on Fig. 4 to Figure 15 first embodiment of protection component of the present utility model is described.
Prepare the substrate of a double-sided metal intermediate insulation, at this preferential double-sided copper-clad substrate of selecting, middle insulating substrate selects heat resisting temperature greater than 400 degrees centigrade insulating material, as shown in Figure 4, form the resistance electrode array in the one side, as shown in Figure 5, form the bottom electrode array in a relative side, can adopt modes such as etching, laser engraving or mechanical engraving, preferably etching mode; Form resistance at resistance electrode then, as shown in Figure 6, active component can adopt vacuum sputtering, electroplates chemical plating, modes such as electron beam welding, preferably vacuum sputtering; Then attach second insulating barrier at resistive element, attach Copper Foil at second insulating barrier then, heating is solidified second insulating barrier, electrod-array in Copper Foil forms then, as shown in Figure 7; Then form melt at middle electrode, three distinct area of electrode during the melt that forms connects, as Fig. 8 and shown in Figure 9, the mode that forms melt can adopt vacuum sputtering, mode such as chemical plating and plating, preferably adopt the mode of vacuum sputtering to deposit the last layer metal level earlier earlier, and then adopt the mode of electroplating to electroplate another layer metal level, the metal level of deposition can be metal or metal alloy such as gold, silver, copper, tin earlier, and back electroplated metal layer can be low-melting tin or ashbury metal.Arrive this, loading plate completes.
Prepare a double-sided copper-clad substrate and an insulated substrate, adopt the mode of machinery or punching press to carry out as shown in figure 10 via-hole array at insulated substrate, adopt etched mode to form top electrode in double-sided copper-clad substrate one side, form the layer of fluxing at opposite side, ready-made double-sided copper-clad substrate as shown in figure 11.At both binding site coating adhesives, contraposition accurately back is bonding, and makes its curing then.Arrive this, upper cover plate completes as Figure 12 and shown in Figure 13.
At the reeded one side of upper cover plate and loading plate the binding site coating binder of the one side of melt is arranged, and be coated with flux at melt, accurately the back is bonding with the two boards contraposition, makes adhesive solidification then.As shown in figure 14.
With the boring of the substrate after bonding, drill through the position, hole as shown in figure 15, expose middle electrode in the boring metapore, form end electrode by chemical plating or plating again, top electrode, middle electrode and bottom electrode are formed be electrically connected.
Describe the particular location of the first virtual dividing line 13 and the second virtual dividing line 14 as shown in figure 15, the protection component of putting in order plate has been cut along this cut-off rule, namely formed single protection component.
Below, based on Figure 16 to Figure 19 second embodiment of protection component of the present utility model is described.At this, the component omission explanation identical with first execution mode.This execution mode is with the different of first execution mode:
The production method of upper cover plate is as follows:
Prepare the copper-clad base plate of a single face, after adopting the machining mode to form groove, in groove, form the layer of fluxing then, form the layer of fluxing and to adopt vacuum sputtering or chemical plating, form top electrode in a unnotched side then, ready-made upper cover plate as shown in figure 12; Can adopt modes such as etching, laser engraving or mechanical engraving, preferably etching mode equally.
The production method of melt is as follows on the loading plate:
Printed solder paste on middle electrode as shown in figure 16, makes the mode of low-melting alloy sheet by radium-shine welding the low-melting alloy sheet to be formed part solder(ing) paste melted by heat be electrically connected, as Figure 17 and shown in Figure 180 with middle electrode; Also can adopt the mode of hot pressing welding; The more low slimming of protection component and the operating chacteristics of protection component of more being conducive to of the thickness of solder(ing) paste.The structure of the single current/voltage protection component that second embodiment makes as shown in figure 19.
The utility model adopts yellow photolithographic techniques to form the figure of electrode and melt, has avoided adopting the thick film screen printing sintering process of a large amount of consumed powers, and is energy-saving and cost-reducing.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong within the protection range of the utility model claim.
Claims (8)
1. over-current over-voltage protection element is characterized in that: comprise loading plate, melt, upper cover plate (7) and end electrode (8):
Described loading plate comprises middle electrode (1), bottom electrode (2), resistive layer (3), first insulating barrier (4), second insulating barrier (5), electrode (1) is divided at least three isolated zones in described, be provided with resistive layer (3) and resistance electrode (9) between middle electrode (1) and the bottom electrode (2), be provided with first insulating barrier (4) between bottom electrode (2) and the resistive layer (3), be provided with second insulating barrier (5) between middle electrode (1) and the resistive layer (3);
Described melt is covered on the middle electrode (1), and the zone that middle electrode (1) is isolated each other forms and is electrically connected;
Described upper cover plate (7) is that opening is towards the groove structure of loading plate, comprise openend and the blind end relative with openend, described openend and loading plate adhesive bond form a cavity, and the outside of described blind end is provided with top electrode (10), and the inboard of described blind end is provided with the layer (11) of fluxing;
Described end electrode (8) is arranged at loading plate and upper cover plate (7) both sides, makes to form between top electrode (10), middle electrode (1) and the bottom electrode (2) to be electrically connected.
2. a kind of over-current over-voltage protection element according to claim 1 is characterized in that: described fluxing is provided with gap (13) between layer (11) and the melt, is provided with flux (12) in gap (13).
3. a kind of over-current over-voltage protection element according to claim 1 and 2; it is characterized in that: described melt comprises the first metal layer (6) and second metal level (16); described second metal level (16) is laid between the zone that middle electrode (1) is gone up and middle electrode (1) isolates each other continuously; the zone that middle electrode (1) is isolated each other forms and is electrically connected, and described the first metal layer (6) is arranged on second metal level (16).
4. a kind of over-current over-voltage protection element according to claim 1 and 2; it is characterized in that: described melt comprises low-melting alloy sheet (19) and solder(ing) paste (18), and low-melting alloy sheet (19) is connected with the zone that middle electrode isolates each other by solder(ing) paste (18).
5. a kind of over-current over-voltage protection element according to claim 1 and 2, it is characterized in that: described first insulating barrier (4) and second insulating barrier (5) are resistant to elevated temperatures high-molecular organic material.
6. a kind of over-current over-voltage protection element according to claim 1 and 2 is characterized in that: the openend of described upper cover plate (7) and loading plate are bonding by adhesive (17).
7. a kind of over-current over-voltage protection element according to claim 1 and 2 is characterized in that: the described layer (11) of fluxing is metal flat.
8. an over-current over-voltage protection element arrays is characterized in that: comprise any described over-current over-voltage protection element in several claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176198 CN203134738U (en) | 2013-04-10 | 2013-04-10 | An over-current over-voltage protection element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320176198 CN203134738U (en) | 2013-04-10 | 2013-04-10 | An over-current over-voltage protection element |
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| Publication Number | Publication Date |
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| CN203134738U true CN203134738U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320176198 Withdrawn - After Issue CN203134738U (en) | 2013-04-10 | 2013-04-10 | An over-current over-voltage protection element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236380A (en) * | 2013-04-10 | 2013-08-07 | 南京萨特科技发展有限公司 | Over-current over-voltage protective element and manufacture method thereof |
| CN114446718A (en) * | 2022-01-19 | 2022-05-06 | 苏州晶讯科技股份有限公司 | Low-current polymer patch fuse and preparation method thereof |
-
2013
- 2013-04-10 CN CN 201320176198 patent/CN203134738U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236380A (en) * | 2013-04-10 | 2013-08-07 | 南京萨特科技发展有限公司 | Over-current over-voltage protective element and manufacture method thereof |
| CN103236380B (en) * | 2013-04-10 | 2015-07-01 | 南京萨特科技发展有限公司 | Over-current over-voltage protective element and manufacture method thereof |
| CN114446718A (en) * | 2022-01-19 | 2022-05-06 | 苏州晶讯科技股份有限公司 | Low-current polymer patch fuse and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20150701 |
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| RGAV | Abandon patent right to avoid regrant |