CN206401314U - Protection element - Google Patents
Protection element Download PDFInfo
- Publication number
- CN206401314U CN206401314U CN201720045170.0U CN201720045170U CN206401314U CN 206401314 U CN206401314 U CN 206401314U CN 201720045170 U CN201720045170 U CN 201720045170U CN 206401314 U CN206401314 U CN 206401314U
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- Prior art keywords
- fuse
- heater
- protection element
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Abstract
The utility model discloses a kind of protection element, and it includes a substrate；One heater, is arranged on the substrate；One fuse, is arranged above the heater, is fused by after heater heating；And an outer cover, on the substrate, upper plate and side wall are included, the inner space for accommodating the heater and the fuse is formed；One adsorption plate, located at the upper plate lower surface and above the fuse, adsorbs the molten metal during blown fuse.The utility model has the function of overvoltage, overcurrent and/or over-temperature protection, can lift the fusing effect of wherein fuse, make fusing time more accurate.
Description
【Technical field】
The utility model is related to electronic circuit technology field, and having in particular to one kind prevents overvoltage, overcurrent
Or the protection element of excess temperature function.
【Background technology】
Mobile device is highly popular in recent years, and the information products such as mobile phone, notebook computer are seen everywhere such as so that people
Usage amount to information products increases.However, having the battery on portable type electronic products such as mobile phones frequently in discharge and recharge
During the news exploded.Therefore, manufacturer progressively improves foregoing overcurrent and the design of overvoltage protection element, lifting electricity
Safeguard measure of the pond during discharge and recharge, to prevent battery from being burnt during discharge and recharge because of overvoltage or overcurrent
Ruin.
On overcurrent protection, the fuse being made up of the low-melting-point metal body such as lead, tin, antimony is there are known to extensively.Afterwards,
In terms of overcurrent and overvoltage is prevented, sustainable development goes out protection element, and it includes on one substrate sequentially lamination heater
And fuse.In overvoltage, heater can be generated heat, and heat is transmitted bottom-up, will carry the heated by electrodes of fuse, and be melted
Break the fuse, cuts off the electric current flowed through, to protect the circuit or electronic installation of correlation.
For detailed construction, existing protection element has substrate, heater, fuse and outer cover.Outer cover outer rim is set
Substrate surface is placed in, and inner space is provided and accommodates heater and fuse.Heater is configured on substrate, and electrical connection two is sent out
Hot body electrode.Fuse is configured above heater.Heater adstante febre can directly melt fuse so that fuse melting and
Flowed to electrode, therefore the backward connected electrode aggregation of fuse melting, cause whole piece metal of the fuse from script,
Polylith is broken up into after melting, and chopping current reaches protection purpose.This prior art is because these electrode zones are all in fuse
Lower section, and fuse surface easily produces different degrees of oxidation when being heated at high temperature melting, hinder molten metal to these
Electrode is assembled, and causes this fuse to be difficult fusing, and has the problem of fusing time is inaccurate.
Therefore, it is necessary to design a kind of new protection element to solve the above problems.
【Utility model content】
The purpose of this utility model is to provide a kind of protection element, and there is overvoltage, overcurrent and/or excess temperature to protect for it
The function of shield, can lift the fusing effect of wherein fuse, make fusing time more accurate.
The utility model is achieved through the following technical solutions above-mentioned purpose：A kind of protection element, it includes
One substrate；
One heater, is arranged on the substrate；
One fuse, is arranged above the heater, is fused by after heater heating；And
One outer cover, on the substrate, comprising upper plate and side wall, forms the inside for accommodating the heater and the fuse
Space；
One adsorption plate, located at the upper plate lower surface and above the fuse, adsorbs the melting during blown fuse
Metal.
Further, the adsorption plate includes capillary through holes.
Further, the adsorption plate towards the surface of the fuse be male and fomale(M＆F).
Further, in addition to it is covered in the insulating barrier on the heater top, the first electrode on the substrate and
Two electrodes, the target on the insulating barrier.
Further, the fuse is connected with the first electrode, the second electrode and the target.
Further, the upper plate includes thermal vias.
Further, there is gap between the adsorption plate and the fuse, the gap is filled with tin cream.
Further, the adsorption plate and the fuse surface are directly contacted.
Different from traditional technology, the embodiment of the present utility model not only has the electrode of three lower sections in fuse, can
To adsorb the molten metal of fuse, also there is the ability that adsorption plate possesses absorption molten metal in the top of fuse in addition.Cause
This starts heating when heater, and when transferring heat to fuse, fuse starts melting, and adsorbs by the adsorption plate of top,
Oxide layer is set to be difficult to be formed.In addition, when heat is toward three electrodes descended into below fuse, then court exists the molten metal of fuse
Three electrode adsorptions are gone over below, so that fuse wire.The utility model is by from top adsorption plate and lower electrode one
Neat absorption molten metal, can overcome the problem of traditional technology fusing time is inaccurate.
The heater and fuse of protection element of the present utility model can use printing technology to make, and can make slim
Structure.Furthermore, compared to traditional protection element structure design, the fusing time of protection element of the present utility model more collects
In, and have less standard deviation, with superior quality stability.
【Brief description of the drawings】
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the circuit diagram of the utility model embodiment；
Fig. 3 is the structural representation on the surface of the utility model embodiment adsorption plate one；
Fig. 4 is the structural representation on another surface of the utility model embodiment adsorption plate.
Description of reference numerals：
10 protection elements
11 substrates
12 heaters
13 insulating barriers
14 fuses
The fuses of 14a first
The fuses of 14b second
15 adsorption plates
16 outer covers
17 targets
18 heater electrodes
19 first electrodes
20 second electrodes
151 capillary through holes
152 male and fomale(M＆F)s
161 thermal vias
【Embodiment】
For above and other technology contents of the present utility model, feature and advantage can be become apparent, it is cited below particularly go out
Related embodiment, and coordinate Figure of description, it is described in detail below.
Fig. 1 is the diagrammatic cross-section of protection element 10 of the present utility model, and foregoing protection mechanism equally can be achieved in it.Fig. 2
For the corresponding circuit diagram of protection element 10.Protection element 10 has substrate 11, heater 12, insulating barrier 13, fuse 14, absorption
Plate 15 and outer cover 16.The outer rim cover of outer cover 16 is arranged at the surface of substrate 11, and provides inner space and accommodate heater 12, insulating barrier
13rd, fuse 14 and adsorption plate 15.Heater 12 is configured on substrate 11, and two heater electrodes 18 of electrical connection.Fuse
First electrode 19, second electrode 20 and a target 17 for 14 connection both sides.Insulating barrier 13 covers heater 12 and hair
Hot body electrode 18.Fuse 14 is configured at the top of insulating barrier 13, and is formed separately by target 17 comprising 2 the first fuses
14a and the second fuse 14b circuit.The heater electrode 18 of the electrical connection heater 12 of target 17 one end, the other end
Heater electrode 18 be used as connection external circuit interface.Outer cover 16 includes upper plate and side wall, and adsorption plate 15 is arranged at upper plate
Lower surface, and positioned at the top of the about central part of fuse 14, for assembling or adsorbing the melting of presentation before fuse 14 blows
Metal.Overheat may be such that outer cover 16 produces slight crack, and the top of adsorption plate 15 can be located in outer cover 16 or neighbouring part makes
Thermal vias 161 come strengthen radiating, to prevent outer cover 16 to be cracked.
Substrate 11 is as supporting substrate, and it can be the insulated substrate of square panes, and material can select such as aluminum oxide, nitrogen
Change aluminium, zirconium oxide or glass-fiber-plate etc..First electrode 19 and second electrode 20, target 17, heater electrode 18 can comprising silver,
Gold, copper, tin, nickel or other conducting metals, thickness is about 0.01~1mm.The material of fuse 14 can select low-melting-point metal or
Its alloy, such as Sn-Pb-Ag, Sn-Ag, Sn-Sb, Sn-Ag-Cu.And the magnitude of current depending on being required through, the length of fuse 14
Degree can be adjusted with width, but without departing from substrate 11, its thickness is between 0.001mm to 1mm.Thicker fuse 14 is used in
High current such as 50~100A application.The material of insulating barrier 13 can select glass (glass), epoxy resin (epoxy), oxidation
Aluminium or silica gel (silicone) etc..
Protection element 10, which is acted, can substantially divide three sections, and can be described as three-stage protection element.When detecting voltage more than one
When default value (overvoltage) or temperature are more than a default value (excess temperature), electric current flows through heater 12 so that heater 12 generates heat
(first paragraph).Heater 12, which generates heat, fuses fuse 14 (second segment), and then provides the protection of overvoltage or excess temperature.Serve as
When electric current occurs, substantial amounts of electric current, which flows through fuse 14, can make fuse 14 generate heat and fuse, and then reach overcurrent protection (the
Three sections).
Specifically, heater 12, which can generate heat, directly heats fuse 14 so that fuse 14 is melted and to the of both sides
One electrode 19, second electrode 20 and target 17 flow, therefore both sides first electrode 19, second electrode 20 and target 17
This three electrode zone, is that fuse 14 melts this backward three region clustering, causes whole piece metal of the fuse 14 from script, melt
Three pieces are broken up into after melting, and chopping current reaches protection purpose.Because three electrode zones are all in the lower section of fuse 14, produce
The situation that the molten metal of fuse 14 is adsorbed downwards.Adsorption plate 15 of the present utility model is arranged at the top of fuse 14, so
The situation that the molten metal of absorption fuse 14 is adsorbed upwards is produced in addition.In other words, fuse 14 can be after melting simultaneously
Adsorb up and down, contribute to the fusing rapidly of fuse 14, and have and more accurately melt the disconnected time.
Adsorption plate 15 can be metal adsorption plate, use silver paste mode of printing, or prepared with plating mode.The shape of adsorption plate 15
Shape is not limited, can with odd number or multiple strips, bulk etc., composition can for silver, gold, copper, nickel, tin, lead, antimony, etc. metal or alloy.Inhale
Attached plate 15 can directly contact or retain a gap with fuse 14.This gap is no more than 1.5mm, preferably no more than 1mm, and is able to
This gap is inserted with tin cream (not shown).The effect of adsorption plate 15 and tin cream be from top adsorpting aggregation fuse 14 melt when
Metal, it is to avoid it flows everywhere, and this gap can also use rosin or other soft metals or scaling powder to insert, but still must tool
The function of the standby molten metal from top adsorpting aggregation fuse 14.The position of heater 12 corresponds to fuse 14, so hair
The heat that hot body 12 is produced can effectively be transferred to fuse 14, to melt the fuse 14.
Reference picture 3, in order to which the molten metal for increasing adsorption plate 15 is assembled and adsorption effect, except producing alloy using high temperature
Outside the phenomenon adsorbed each other, multiple capillary through holes 151 can also be made in adsorption plate 15, it has appropriate aperture, is able to profit
With capillary (capillary) principle increase aggregation adsorption effect.Or, male and fomale(M＆F) 152 is set in the surface of adsorption plate 15, utilized
Coarse male and fomale(M＆F) increases surface area to increase aggregation adsorption effect, as shown in Figure 4.
At high temperature heat, some are covered in the protection of the chemicals such as the scaling powder on the surface of fuse 14 to traditional protection element
Film can lose de-protected effect because being lost in or volatilizing, and cause the surface of fuse 14 easily to aoxidize, and form oxide-film.This oxide-film
It is covered on the surface of fuse 14 of melting, hinders the three electrode zones aggregation of molten metal downwards, cause fuse 14
Fusing is difficult, and has the problem of fusing time is inaccurate.The utility model is increased on fuse 14 using the structure design of innovation
The adsorption plate 15 of side is there is provided the ability adsorbed upwards, and can break through the problem of being difficult fusing makes fusing time more accurate.In addition,
Further adsorption effect can be promoted by way of capillary theory and increase surface area.
Test result of the present utility model carries out fusing time test, whether in 6W or 4.5V test, and this practicality is new
The fusing time of the protection element of type all shows relatively low standard deviation value.As can be seen here, compared to traditional structure design,
The fusing time distribution of protection element of the present utility model is more concentrated, and has relatively low standard deviation, therefore can tie up in volume production
More preferably quality stability is held, also ensures that protection element can fuse rapidly and accurately and provide protection.
The equivalent circuit of the protection element 10 of previous embodiment includes 2 fuses and 1 heater, but can also profit
Designed with other different structural circuits, make the circuit form comprising such as 2 fuses and 2 heaters, and be still this reality
Covered with new innovative technology.
The utility model can break through traditional protection element fusing be difficult with fusing time it is not accurate the problem of.Because high temperature is produced
Alloy and the phenomenon adsorbed each other so that in addition to the molten metal of fuse is adsorbed downwards, while also assembling upward, and prevent
Oxide layer is only produced at high temperature, so that fuse can smoothly fuse, the utility model effectively breaks through tradition and is difficult fusing
Problem, and fusing time can be made more accurate.Compared to traditional protection element structure design, protection element of the present utility model
Fusing time more concentrate, and have less standard deviation, with more superior quality stability.
Technology contents and technical characterstic of the present utility model are disclosed as above, but relevant technical staff in the field still may
A variety of replacements and modification without departing substantially from the utility model spirit are made based on disclosure of the present utility model and enlightenment.Therefore, this reality
Should be not limited to new protection domain shown in embodiment, and should include it is various without departing substantially from replacement of the present utility model and modification,
And covered by claim.
Claims (8)
1. a kind of protection element, it is characterised in that：It includes
One substrate；
One heater, is arranged on the substrate；
One fuse, is arranged above the heater, is fused by after heater heating；And
One outer cover, on the substrate, comprising upper plate and side wall, forms the inside sky for accommodating the heater and the fuse
Between；
One adsorption plate, located at the upper plate lower surface and above the fuse, adsorbs the molten metal during blown fuse.
2. protection element as claimed in claim 1, it is characterised in that：The adsorption plate includes capillary through holes.
3. protection element as claimed in claim 1, it is characterised in that：The adsorption plate is concavo-convex towards the surface of the fuse
Face.
4. protection element as claimed in claim 1, it is characterised in that：Also include be covered in the heater top insulating barrier,
First electrode and second electrode on the substrate, the target on the insulating barrier.
5. protection element as claimed in claim 4, it is characterised in that：The fuse and the first electrode, the second electrode with
And target connection.
6. protection element as claimed in claim 1, it is characterised in that：The upper plate includes thermal vias.
7. protection element as claimed in claim 1, it is characterised in that：There is gap between the adsorption plate and the fuse, between being somebody's turn to do
Gap is filled with tin cream.
8. protection element as claimed in claim 1, it is characterised in that：The adsorption plate and the fuse surface are directly contacted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045170.0U CN206401314U (en) | 2017-01-12 | 2017-01-12 | Protection element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045170.0U CN206401314U (en) | 2017-01-12 | 2017-01-12 | Protection element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206401314U true CN206401314U (en) | 2017-08-11 |
Family
ID=59517888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720045170.0U Active CN206401314U (en) | 2017-01-12 | 2017-01-12 | Protection element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206401314U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987204A (en) * | 2017-06-02 | 2018-12-11 | 聚鼎科技股份有限公司 | Protection element and its circuit protection device |
| CN109103521A (en) * | 2018-08-23 | 2018-12-28 | 江门市钧崴电子科技有限公司苏州分公司 | Battery protecting apparatus and its heating structure, electronic equipment |
| CN115910697A (en) * | 2022-12-29 | 2023-04-04 | 深圳市良胜电子有限公司 | Three-terminal fuse preparation method and three-terminal fuse |
| WO2023140065A1 (en) * | 2022-01-20 | 2023-07-27 | デクセリアルズ株式会社 | Protective element, and battery pack |
-
2017
- 2017-01-12 CN CN201720045170.0U patent/CN206401314U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987204A (en) * | 2017-06-02 | 2018-12-11 | 聚鼎科技股份有限公司 | Protection element and its circuit protection device |
| CN108987204B (en) * | 2017-06-02 | 2019-12-17 | 聚鼎科技股份有限公司 | Protection element and circuit protection device thereof |
| CN109103521A (en) * | 2018-08-23 | 2018-12-28 | 江门市钧崴电子科技有限公司苏州分公司 | Battery protecting apparatus and its heating structure, electronic equipment |
| CN109103521B (en) * | 2018-08-23 | 2024-05-03 | 钧崴电子科技股份有限公司 | Battery protection device, heating structure thereof and electronic equipment |
| WO2023140065A1 (en) * | 2022-01-20 | 2023-07-27 | デクセリアルズ株式会社 | Protective element, and battery pack |
| CN115910697A (en) * | 2022-12-29 | 2023-04-04 | 深圳市良胜电子有限公司 | Three-terminal fuse preparation method and three-terminal fuse |
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