CN105433466A - Kneecap - Google Patents

Kneecap Download PDF

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Publication number
CN105433466A
CN105433466A CN201510290919.3A CN201510290919A CN105433466A CN 105433466 A CN105433466 A CN 105433466A CN 201510290919 A CN201510290919 A CN 201510290919A CN 105433466 A CN105433466 A CN 105433466A
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electrode
bus bar
negative
positive
knee
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CN201510290919.3A
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CN105433466B (en
Inventor
冯欣悦
冯冠平
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Shenzhen Allen Times Technology Co ltd
Shenzhen St. George Graphene Technology Co.,Ltd.
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Individual
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Abstract

The invention relates to a kneecap. The kneecap comprises a kneecap body and a heating film arranged on the kneecap body, wherein the heating film comprises a first insulation layer, a conductive layer formed on the surface of the first insulation layer, an electrode layer formed on the surface of the conductive layer and electrically connected with the conductive layer and a second insulation layer formed on the surface of the electrode layer. The electrode layer comprises positive electrodes and negative electrodes, wherein each positive electrode comprises a positive electrode bus bar and multiple positive electrode inner electrodes extending out of the positive electrode bus bar, each negative electrode comprises a negative electrode bus bar and multiple negative electrode inner electrodes extending out of the negative electrode bus bar, and the positive electrode inner electrodes and the negative electrode inner electrodes are alternatively arranged and are mutually spaced. The kneecap further comprises a connecting line electrically connected with the electrode layer of the heating film. The kneecap has a heating function and can be powered on with low-voltage electricity.

Description

Knee-pad
Technical field
The present invention relates to a kind of knee-pad.
Background technology
At present, knee-pad adopts the resistance good material preparation such as cotton, suede or fur to carry out warming to knee mostly.When in use, these knee-pads self can not release heat, but the heat distributed by accumulation human body is to reach warming object, and when using in the environment of cold, these knee-pads are very limited to the thermal effect of knee, are difficult to the invasion and attack of resisting external cold air.
Heating knee pad generally arranges resistance wire and generates heat in knee pad body, but the supply voltage that metal electric heated filament needs as resistance wire is higher, once leak electricity, entail dangers to life, danger is larger.
Summary of the invention
Based on this, be necessary to provide a kind of knee-pad with heating function that low voltage can be adopted to power.
A kind of knee-pad, comprise knee pad body and be arranged at the heating film in described knee pad body, described heating film comprises:
First insulating barrier;
Conductive layer, is formed at the surface of described first insulating barrier;
Electrode layer, be formed at the surface of described conductive layer and be electrically connected with described conductive layer, described electrode layer comprises positive electrode and negative electrode, described positive electrode comprises positive bus bar and electrode in multiple positive poles that described positive bus bar is extended, described negative electrode comprises negative bus bar and electrode in multiple negative poles that described negative bus bar is extended, and in described positive pole, in electrode and described negative pole, electrode is arranged alternately and spaced; And
Second insulating barrier, is formed at the surface of described electrode layer;
Described knee-pad also comprises the connecting line be electrically connected with the electrode layer of described heating film.
Wherein in an embodiment, described positive bus bar and described negative bus bar are linear and be arranged in parallel, in multiple described positive pole, electrode extends to described negative bus bar near the side of described negative bus bar from described positive bus bar, and in multiple described negative pole, electrode extends to described positive bus bar near the side of described positive bus bar from described negative bus bar.
Wherein in an embodiment, described positive bus bar and described negative bus bar are arc and interval is arranged, in described positive pole, the inner side of electrode negative bus bar described in side direction in described positive bus bar extends, and in described negative pole, the inner side of electrode positive bus bar described in side direction in described negative bus bar extends.
Wherein in an embodiment, described heating film also comprises the auxiliary electrode layer be arranged between described first insulating barrier and described conductive layer, described auxiliary electrode layer is electrically connected with described conductive layer, described auxiliary electrode layer comprises auxiliary positive electrode and auxiliary negative electrode, described auxiliary positive electrode comprises auxiliary positive busbar and electrode in multiple auxiliary positive that described auxiliary positive busbar extends, described auxiliary negative electrode comprises auxiliary negative busbar and electrode in multiple auxiliary negative that described auxiliary negative busbar extends, in described auxiliary positive, in electrode and described auxiliary negative, electrode is arranged alternately and spaced.
Wherein in an embodiment, in the auxiliary positive of described auxiliary electrode layer in electrode and described auxiliary negative electrode in the projection of described conductive layer and the positive pole of described electrode layer in electrode and described negative pole electrode mutually stagger in the projection of described conductive layer.
Wherein in an embodiment, described heating film also comprises the first glue-line and the second glue-line, and described first glue-line is arranged between described first insulating barrier and described conductive layer, and described second glue-line is arranged between described electrode layer and described second insulating barrier.
Wherein in an embodiment, described positive electrode has multiple, multiple described positive electrode series connection;
And/or described negative electrode has multiple, multiple described negative electrode series connection.
Wherein in an embodiment, described heating member also comprises controller and wireless communicator, described controller is electrically connected with described electrode layer, described wireless communicator can receive control instruction, and sending described control instruction to described controller, described controller controls the heating of described heating film according to described control instruction.
Another kind of knee-pad,
Comprise knee pad body and be arranged at the heating film in described knee pad body, described heating film comprises:
First insulating barrier;
First electrode layer, is formed at the surface of described first insulating barrier, and described first electrode layer comprises positive electrode, and described positive electrode comprises positive bus bar and electrode in multiple positive poles that described positive bus bar is extended,
Conductive layer, is formed at the surface of described first electrode layer, and described conductive layer is electrically connected with described first electrode layer;
The second electrode lay, be formed at the surface of described conductive layer and be electrically connected with described conductive layer, described the second electrode lay comprises negative electrode, described negative electrode comprises negative bus bar and electrode in multiple negative poles that described negative bus bar is extended, and in described positive pole, in electrode and described negative pole, electrode to be arranged alternately and spaced in the projection of described conductive layer; And
Second insulating barrier, is formed at the surface of described the second electrode lay;
Described knee-pad also comprises the connecting line be electrically connected with the first electrode layer and the second electrode lay of described heating film.
Above-mentioned knee-pad, because the positive electrode of the electrode layer of heating film comprises electrode in multiple positive pole, negative electrode comprises electrode in multiple negative pole, in positive pole, in electrode and negative pole, electrode is arranged alternately, and reduces the spacing between adjacent interior electrode, thus makes the resistance of the conductive layer in positive pole in electrode and negative pole between electrode less, thus lower power voltage supply can be adopted, even if adopt common lithium battery power supply, the object of heating rapidly can be reached, thus lower power voltage supply can be used.
Accompanying drawing explanation
Fig. 1 is the structural representation of the knee-pad of an embodiment;
Fig. 2 is the structural representation of the heating member of knee-pad in Fig. 1;
Fig. 3 is the structural representation of the heating film of heating member in Fig. 2;
Fig. 4 is the structural representation of the electrode layer of heating film in Fig. 3;
Fig. 5 is the structural representation of the heating film of the knee-pad of another embodiment;
Fig. 6 is the structural representation of the heating film of the knee-pad of another embodiment;
Fig. 7 is the structural representation of the heating film of the knee-pad of another embodiment;
Fig. 8 is the structural representation of the electrode layer of the heating film of the knee-pad of another embodiment;
Fig. 9 is the structural representation of the electrode layer of the heating film of the knee-pad of another embodiment;
Figure 10 is the structural representation of the electrode layer of the heating film of the knee-pad of another embodiment;
Figure 11 is the heating film Temperature Distribution photo of the embodiment 1 of thermal infrared imager shooting;
Figure 12 is the heating film Temperature Distribution photo of the embodiment 2 of thermal infrared imager shooting.
Detailed description of the invention
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
Please refer to Fig. 1 and Fig. 2, the knee-pad 1 of an embodiment, comprises heating member 10 and knee pad body 90.
Heating member 10 comprises heating film 110, outer cover 130, electric supply installation 150, power switch 170, temperature regulating device 180.
Outer cover 130 is sheathed on heating film 110, and heating film 110 is contained in outer cover 130.
Electric supply installation 150, power switch 170 and temperature regulating device 180 are electrically connected with heating film 110 by connecting line (scheme depending on).The material of outer cover 130 can be cloth, can certainly adopt the material that other are commonly used in the industry, as far-infrared material.
In the illustrated embodiment, knee pad body 90 is roughly strip, and heating film 110 is banded, and heating film 110 and outer cover 130 are fixedly arranged in knee pad body 90.Certainly, in other embodiments, knee pad body 90 also can for the sleeve be made up of elastomeric material.It should be noted that, knee pad body 90 can further include internal layer and skin, and between the skin that heating film 110 is directly located in knee pad body 90 and internal layer, now outer cover 130 can omit.Certainly, knee-pad 1 can also comprise for miscellaneous parts such as fixing bandage or thread gluings, does not repeat at this.
Refer to Fig. 3, in the illustrated embodiment, heating film 110 comprises the first insulating barrier 112, conductive layer 114, electrode layer 116 and the second insulating barrier 118 that stack gradually.
First insulating barrier 112 is substrate.The material of the first insulating barrier 112 is glass or polymer.Preferably, polymer is PET, PVC, PE, PMMA, PVDF, PANI or PC.Preferably, the thickness of the first insulating barrier 112 is 10 μm ~ 125 μm.
Conductive layer 114 is formed at a side surface of the first insulating barrier 112.Conductive layer 114 is formed by conductive material.Preferably, the material of conductive layer 114 is silver, copper, aluminium, Graphene, CNT, ITO, FTO or AZO.Preferred further, the material of conductive layer 114 is single-layer graphene or multi-layer graphene.When the material of conductive layer is Graphene, conductive layer 114 can also contain adulterant, and adulterant is organic blended dose or inorganic doping agent.Preferably, the thickness of conductive layer is 10nm ~ 100nm.
Electrode layer 116 is formed at the surface of conductive layer 114, and is electrically connected with conductive layer 114.
Refer to Fig. 4, in the illustrated embodiment, electrode layer 116 comprises positive electrode 1162 and negative electrode 1164.The thickness of electrode layer 116 is 10nm ~ 35 μm.
Positive electrode 1162 comprises positive bus bar 1162a and electrode 1162b in multiple positive poles that positive bus bar 1162a extends.
In the illustrated embodiment, positive bus bar 1162a is roughly strip, the extension (scheming not mark) comprising main body (figure does not mark), connecting portion (figure does not mark) and be connected with connecting portion.Main body, connecting portion and extension are for being straight line strip.One end of connecting portion is connected with one end of main body is vertical, and the other end of connecting portion is connected with one end of extension is vertical, and main body and extension lay respectively at the both sides of connecting portion.
In positive pole, electrode 1162b has multiple, and in multiple positive pole, the side of the equal autonomous agent of electrode 1162b is extended.In the illustrated embodiment, in positive pole, electrode 1162b is linear pattern and all perpendicular to the main body of positive bus bar 1162a.In positive pole, the connecting portion of electrode 1162b and positive bus bar 1162a is in the homonymy of the main body of positive bus bar 1162a.In positive pole, the width of electrode 1162b is 0.5mm ~ 4mm.The width of positive bus bar 1162a is much larger than the width of electrode 1162b in positive pole.The width of positive bus bar 1162a is 6mm ~ 10mm.
Negative electrode 1164 comprises negative bus bar 1164a and electrode 1164b in multiple negative poles that negative bus bar 1164a extends.
In the illustrated embodiment, negative bus bar 1164a is roughly strip, the extension (scheming not mark) comprising main body (figure does not mark), connecting portion (figure does not mark) and be connected with connecting portion.Main body, connecting portion and extension are for being straight line strip.One end of connecting portion is connected with one end of main body is vertical, and the other end of connecting portion is connected with one end of extension is vertical, and main body and extension lay respectively at the both sides of connecting portion.The main body of negative bus bar 1164a and the main body of positive bus bar 1162a are parallel to each other and interval is arranged, in positive pole, electrode 1162b is between the main body and the main body of positive bus bar 1162a of negative bus bar 1164a, and in positive pole electrode 1162b away from one end of positive bus bar 1162a and negative bus bar 1164a main body separately.The connecting portion of negative bus bar 1164a extends to the direction of the connecting portion near positive bus bar 1162a from one end of the main body of negative bus bar 1164a, and the connecting portion of negative bus bar 1164a is roughly concordant with the connecting portion of positive bus bar 1162a.
In negative pole, electrode 1164b has multiple, in negative pole, electrode 1164b all extends from the side of the main body of negative bus bar 1164a near the main body of positive bus bar 1162a, main body towards positive bus bar 1162a extends, and in negative pole the main body of the end of electrode 1164b and positive bus bar 1162a is separately.In the illustrated embodiment, in negative pole, electrode 1164b is linear pattern and the main body of all vertical negative bus bar 1164a.In negative pole, in electrode 1164b and positive pole, electrode 1162b is arranged alternately and spaced, that is, adjacently with electrode 1162b in positive pole be electrode 1164b in negative pole, and adjacent with electrode 1164b in negative pole is electrode 1162b in positive pole.Adjacent interior electrode is from different busbars.Preferably, in electrode layer 116, in positive pole, in electrode 1162b and negative pole, electrode 1164b is uniformly distributed, and the spacing in namely adjacent positive pole in electrode 1162b and negative pole between electrode 1164b is identical, is 2mm ~ 8mm.In negative pole, the connecting portion of electrode 1164b and negative bus bar 1164a is in the homonymy of the main body of negative bus bar 1164a.In negative pole, the width of electrode 1164b is 0.5mm ~ 4mm.The width of negative bus bar 1164a is much larger than the width of electrode 1164b in negative pole.The width of negative bus bar 1164a is 6mm ~ 10mm.
The material of electrode layer 116 is silver, copper, aluminium, platinum, Graphene, CNT, ITO, FTO or AZO.Certainly, electrode layer 116 also can be starched by silver or copper slurry coating Post RDBMS is formed, and now electrode layer 116 is inevitably containing the other materials in slurry.Preferably, electrode layer 116 is one-body molded with conductive layer 114.Preferably, when the material of conductive layer 114 is Graphene, the material of electrode layer 116 is also Graphene, and electrode layer 116 is one-body molded with conductive layer 114.By arranging electrode layer 116, electrode layer 116 being applied to material is on the conductive layer 114 made of single-layer graphene, heating film 110 can be made at the operating at voltages of≤12V, if the material of conductive layer 114 is multi-layer graphene, operating voltage can be reduced further.
Further, in the positive bus bar 1162a of electrode layer 116, positive pole, in electrode 1162b, negative bus bar 1164a and negative pole, electrode 1164b can be same material, also can be differently to plant materials.
Second insulating barrier 118 is formed at the surface of electrode layer 116.The material of the second insulating barrier 118 is glass or polymer.Preferably, polymer is PET, PVC, PE, PMMA, PVDF, PANI or PC.Preferably, the thickness of the second insulating barrier 118 is 10 μm ~ 125 μm.
Please refer to Fig. 1 to Fig. 3, electric supply installation 150 is electrically connected with the electrode layer 116 of heating film 110 by connecting line.Electric supply installation 150 is for powering to heating film 110, and specifically in the present embodiment, electric supply installation 150 is packaged type power supply, such as lithium battery.
Further, electric supply installation 150 is also provided with charging inlet 152 to charge.
Power switch 170 is electrically connected with electric supply installation 150 and electrode layer 116 simultaneously, for whether controlling the power supply of electric supply installation 150 pairs of electrode layers 116.
Temperature regulating device 180 is electrically connected with electric supply installation 150 and electrode layer 116, for controlling the voltage levels that electric supply installation 150 pairs of electrode layers 116 export, thus controls the heating temp of conductive layer 114.
Please refer to Fig. 1 and Fig. 2, electric supply installation 150, power switch 170 and temperature regulating device 180 are fixed on the surface of knee pad body 90, and connecting line 140 is located at the inside of knee-pad 1, externally invisible.In other embodiments, knee-pad 1 also comprises control piece, and electric supply installation 150, power switch 170 and temperature regulating device 180 are all integrated in control piece with handled easily.
Knee-pad 1 also comprises controller and wireless communicator, and controller is electrically connected with electrode layer 116.Wireless communicator can receive control instruction, and sends control instruction to controller, and controller controls the heating of heating film 110 according to control instruction.Control instruction is sent by control end.Control end comprises at least one of remote controller, mobile phone, panel computer, desktop computer and notebook computer.Control end is provided with infrared transceiver module, WIFI module or ZIGBEE module, and control end is communicated with controller by infrared transceiver module, WIFI module or ZIGBEE module.Further, knee-pad 1 is also provided with the temperature sensor be electrically connected with controller, thus the heating-up temperature of temperature information to heating film that controller can be collected according to the temperature sensor received regulates.Further, also can install on mobile phone corresponding APP with facilitate control heating film heating whether and heating-up temperature.
Preferably, in order to for obtaining good temperature homogeneity at lower voltages, for the special construction of electrode layer 116, the spacing in the temperature difference, initial temperature, supply voltage, adjacent positive pole in electrode 1162b and negative pole between electrode 1164b and the square resistance of conductive layer 114 meet following formula:
T=kU 2/d 2R+t(1)
In formula (1):
T---initial temperature, unit is DEG C;
T---the final temperature difference of heating film, unit is DEG C;
U---supply voltage, unit is V, U≤12V;
D---the spacing in adjacent positive pole in electrode 1162b and negative pole between electrode 1164b, unit is cm, and the spacing in adjacent positive pole in electrode 1162b and negative pole between electrode 1164b is according to the distance computation in conductive layer one side;
R---conductive layer square resistance, unit is Ω/;
K---constant, span is that 10-200, k span has different according to the coefficient of conductivity between heating film from air, and the coefficient of conductivity between heating film and air is inversely proportional to.
Further, in order to ensure the uniformity of knee-pad 1 heating-up temperature, the width of positive bus bar 1162a and negative bus bar 1162b and thickness need consider current carrying capacity and the resistivity of material therefor, resistivity is enough little, to reduce the voltage drop on positive bus bar 1162a and negative bus bar 1162b, to ensure in positive pole that electrode 1164b in electrode 1162b and negative pole is arranged on the diverse location ceiling voltage of positive bus bar 1162a or negative bus bar 1162b and minimum voltage difference is no more than 10%, and current carrying capacity determines positive bus bar 1162a and negative bus bar 1162b sectional area and must be greater than a certain numerical value guarantee positive bus bar 1162a and negative bus bar 1162b and do not burnt, there is following formula (2):
n(n+1)lρ l/WHR<1/5(2)
Wherein:
N---the space-number that in positive pole, in electrode 1162b and negative pole, electrode 1164b produces;
ρ 1---positive bus bar 1162a and negative bus bar 1162b resistivity of material, unit is Ω m;
L---the length of electrode 1164b in electrode 1162b and negative pole in positive pole, unit is m;
W---positive bus bar 1162a and negative bus bar 1162b width, unit is m;
H---positive bus bar 1162a and negative bus bar 1162b thickness, unit is m;
The square resistance of R---conductive layer 114, unit is Ω/.
In above-mentioned formula, assuming that positive bus bar 1162a and negative bus bar 1162b material identical, width and thickness are all identical, and in positive pole, electrode 1162b is identical with the length of electrode 1164b in negative pole.
Equally, interior electrode also needs to ensure current carrying capacity and consider that on same interior electrode, maximum voltage difference is no more than 10%.There is following formula (3):
nl 2ρ 2/whLR<1/5(3)
Wherein:
N---the space-number that in positive pole, in electrode 1162b and negative pole, electrode 1164b produces;
L---the length of electrode 1164b in electrode 1162b and negative pole in positive pole, unit is m;
ρ 2---the resistivity of the material of electrode 1164b in electrode 1162b and negative pole in positive pole, unit is Ω m;
W---the width of electrode 1164b in electrode 1162b and negative pole in positive pole, unit is m;
H---the thickness of electrode 1164b in electrode 1162b and negative pole in positive pole, unit is m;
The length of L---positive bus bar 1162a and negative bus bar 1162b, unit m;
The square resistance of R---conductive layer 114, unit is Ω/.
In above-mentioned formula, assuming that positive bus bar 1162a and negative bus bar 1162b is measure-alike, in positive pole, the material of electrode 1162b and electrode 1164b in negative pole, length, width and thickness are all identical.
Above-mentioned knee-pad, by adopting the electrode layer of special construction, by arranging in positive pole electrode in electrode and negative pole, reduce the spacing between adjacent interior electrode, thus make the resistance of the conductive layer in positive pole in electrode and negative pole between electrode less, thus lower power voltage supply can be adopted, even if adopt common lithium battery power supply, the object of heating rapidly can be reached; When the material of conductive layer 114 is single-layer graphene, adopts and can not obtain the heating effect identical with traditional heating film higher than the power voltage supply of 1.5V; By changing the spacing in the area of the positive bus bar 1162a of electrode layer and negative bus bar 1164a, positive pole in electrode 1162b and negative pole between electrode 1164b, thus different heating powers can be realized, meeting different heating-up temperature demands.Adopt lower power voltage supply, even if there is electric leakage, also can not threaten personal safety completely, the heat time is short, lightweight, and body sense is level and smooth, there is not the problems such as heater strip fracture, electromagnetic-radiation-free.
When the material of the conductive layer of knee-pad is Graphene, can adopts the power voltage supply being no more than 7V, adjust temperature simultaneously by temperature regulating device, heating film can send the extremely consistent far infrared of the far ir ray that sends with human body natural, reaches the object for the treatment of.
Refer to Fig. 5, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, its difference is: in the illustrated embodiment, and the heating film 210 of knee-pad comprises the first insulating barrier 212, first glue-line 213, conductive layer 214, electrode layer 216, second glue-line 217 and the second insulating barrier 218 that stack gradually.Conductive layer 214 and the first insulating barrier 212 are bonded by the first glue-line 213, and the second insulating barrier 218 is bonded by the second insulating barrier 218 with electrode layer 216.Preferably, the material of the first glue-line 213 is ultraviolet cured adhesive, PUR or silica gel, and the material of the second glue-line 217 is ultraviolet cured adhesive, PUR or silica gel.
In above-mentioned knee-pad, heating film 210 is prepared by following steps:
Step S310, provide prefabricated board, prefabricated board comprise for the preparation of electrode layer basic unit and be formed at the conductive layer 214 of substrate surface.
Preferably, basic unit is metal forming.Metal forming is Copper Foil, nickel foil or other metal formings, does not limit at this.
In this step, the prefabricated board provided, conductive layer (such as Graphene) is directly grown in basic unit.
Step S320, by the first glue-line 213, first insulating barrier 212 is bonded to the conductive layer 214 of prefabricated board.
Step S330, prepare mask on the surface of basic unit, and etch processes is carried out to basic unit, after removing mask, obtain electrode layer.
In this step, the design of the pattern electrode layer as required of mask.During etch processes, the prefabricated board making mask is placed in etching solution, etching removing is not by the basic unit of mask protection.
Preferably, the material of the electric conductivity can improving conductive layer 214 is contained in etching solution.
Step S340, by the second glue-line 217, second insulating barrier 218 is bonded to the surface of electrode layer 216.
Preferably, the second glue-line 217 and the second insulating barrier 218 offer corresponding to the positive electrode of electrode layer 216 and the through hole of negative electrode to make lead-in wire.
The preparation method of above-mentioned heating film 210 is comparatively simple, saves time and material cost, meanwhile, adopts metal forming to prepare electrode layer, good conductivity, is conducive to the control of the uniformity of heating film temperature.
Preferably, the thickness of the first glue-line 213 and the second glue-line 217 is 25 ~ 75 μm.
Refer to Fig. 6, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, its difference is: in the illustrated embodiment, and the heating film 410 of knee-pad comprises the first insulating barrier 412, conductive layer 414, electrode layer 416, second glue-line 417 and the second insulating barrier 418 that stack gradually.Second insulating barrier 418 is bonded by the second insulating barrier 418 with electrode layer 416.Preferably, the material of the second glue-line 417 is ultraviolet cured adhesive, PUR or silica gel.
In above-mentioned knee-pad, heating film 410 is prepared by following steps:
Step S510, prepare electrode layer 416 at conductive layer 144 surface printing or evaporation that are formed at the first insulating barrier 412 surface.
Step S520, by the second glue-line 417, second insulating barrier 418 is bonded to the surface of electrode layer 416.
Preferably, the second glue-line 417 and the second insulating barrier 418 offer corresponding to the positive electrode of electrode layer 416 and the through hole of negative electrode to make lead-in wire.
The preparation method of above-mentioned heating film 410 is comparatively simple.
Refer to Fig. 7, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, its difference is: in the illustrated embodiment, and the heating film 510 of knee-pad comprises the first insulating barrier 512, auxiliary electrode layer 513, conductive layer 514, electrode layer 516 and the second insulating barrier 518 that stack gradually.Auxiliary electrode layer 513 is electrically connected with conductive layer 514.The structure of auxiliary electrode layer 513 is identical with the structure of electrode layer 516.Auxiliary electrode layer 513 comprises auxiliary positive electrode (scheme depending on) and auxiliary negative electrode (figure does not look).Auxiliary positive electrode comprises auxiliary positive busbar and electrode in multiple auxiliary positive that auxiliary positive busbar extends.Auxiliary negative electrode comprises auxiliary negative busbar and electrode in multiple auxiliary negative that auxiliary negative busbar extends.In auxiliary positive, in electrode and auxiliary negative, electrode is arranged alternately and spaced.Further preferred, in the auxiliary positive of auxiliary electrode layer 513 in electrode and auxiliary negative electrode in the projection of conductive layer 514 and the positive pole of electrode layer 516 in electrode and described negative pole electrode mutually stagger in the projection of conductive layer.
Refer to Fig. 8, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, and its difference is: in the illustrated embodiment, and electrode layer 616 comprises positive electrode 6162, first negative electrode 6164 and the second negative electrode 6166.First negative electrode 6164 is connected with the second negative electrode 6166.Positive electrode 6162 comprises positive bus bar 6162a and electrode 6162b in multiple positive poles that positive bus bar 6162a extends.In positive pole, electrode 6162b has multiple, and in multiple positive pole, electrode 6162b all extends from the side of positive bus bar 6162a.In the illustrated embodiment, in positive pole, electrode 6162b is linear pattern and all vertical positive bus bar 6162a.
First negative electrode 6164 comprises the first negative bus bar 6164a and electrode 6164b in multiple first negative poles that the first negative bus bar 6164a extends.Second negative electrode comprises the second negative bus bar 6166a and electrode 6166b in multiple second negative poles that the second negative bus bar 6166a extends.First negative bus bar 6164a and the second negative bus bar 6166a is linear pattern, first negative bus bar 6164a and the second negative bus bar 6166a all be arranged in parallel with positive bus bar 6162a, first negative bus bar 6164a and the second negative bus bar 6166a is located on the same line and spaced, and the first negative bus bar 6164a away from one end of the second negative bus bar 6166a and one end of positive bus bar 6162a roughly concordant, second negative bus bar 6166a away from one end of the first negative bus bar 6164a and the other end of positive bus bar 6162a roughly concordant.
In positive pole electrode 6162b away from one end of positive bus bar 6162a near the first negative bus bar 6164a or the second negative bus bar 6166a, and with the first negative bus bar 6164a or the second negative bus bar 6166a separately.In first negative pole electrode 6164b from the side of the first negative bus bar 6164a electrode 6162a in positive pole to electrode 6162a in positive pole extend and with electrode 6162a in positive pole separately, and in the first negative pole, electrode 6164b is arranged alternately with electrode 6162b in the positive pole corresponding to the first negative bus bar 6164a.In second negative pole electrode 6166b from the side of the second negative bus bar 6166a electrode 6162a in positive pole to electrode 6162a in positive pole extend and with electrode 6162a in positive pole separately, and in the second negative pole, electrode 6166b is arranged alternately with electrode 6162b in the positive pole corresponding to the second negative bus bar 6166a.
It should be noted that, the first negative electrode 6164 is not limited to the second negative electrode 6166 and connects, and also can be arranged in parallel.Positive electrode also can be multiple, multiple positive electrode serial or parallel connection.Negative electrode is not limited to two, also can be one or is greater than 2.
Refer to Fig. 9, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, and its difference is: in the illustrated embodiment, and positive bus bar 7162a and the negative bus bar 7164a of electrode layer 716 are linear.Negative bus bar 7162a and positive bus bar 7164a interval are arranged and negative bus bar 7164a extends along the bearing of trend of positive bus bar 7162a.In positive pole electrode 7162b from positive bus bar 7162a to negative bus bar 7164a bending extend, in positive pole the end of electrode 7162b near negative bus bar 7164a and with negative bus bar 7164a separately.In negative pole electrode 7164b from negative bus bar 7164a to positive bus bar 7162a bending extend, in negative pole the end of electrode 7164b near positive bus bar 7162a and with positive bus bar separately.
Refer to Figure 10, the knee-pad of another embodiment is roughly the same with the structure of knee-pad 1, its difference is: in the illustrated embodiment, and positive bus bar 8162a and negative bus bar 8164a is arc and interval is arranged, and positive bus bar 8162a and negative bus bar 8164a is enclosed to form annular.In positive pole electrode 8162a side direction negative bus bar 8162b in positive bus bar 8162a inner side extend, in positive pole the end of electrode 8162b near negative bus bar 8164a and with negative bus bar 8164a separately.In negative pole electrode 8164b side direction positive bus bar 8162a in negative bus bar 8164a inner side extend, in negative pole the end of electrode 8164b near positive bus bar 8162a and with positive bus bar separately.In the illustrated embodiment, in positive pole, in electrode 8162b and negative pole, electrode 8164b is linear pattern.
It should be noted that, positive bus bar and negative bus bar are not limited to the shape that above-mentioned several embodiment is enumerated, and also can be other shapes; In positive pole, in electrode and negative pole, electrode is also not limited to the shape that above-mentioned several embodiment enumerates, also can be other shapes, as shaped form or waveform etc., as long as to make in positive pole electrode in electrode and negative pole be arranged alternately, reduce the spacing in electrode and negative pole between electrode in positive pole.
Be appreciated that and positive electrode and negative electrode can also be set respectively in the both sides of conductive layer, positive electrode and negative electrode identical with the structure of conductive layer in above-described embodiment in the projection of conductive layer.
Further illustrate below in conjunction with specific embodiment.
Embodiment 1:
Please refer to Fig. 4 and Fig. 5, single-layer graphene is as the conductive layer of heating film, and electrode layer adopts the printing of silver slurry.
1, at upper transfer one layer graphene of the PET (the first insulating barrier) of area 150mm × 150mm thickness 125 μm, Graphene is overdoping, and sheet resistance is 250 Ω/;
2, screen printing apparatus is used to print ag paste electrode pattern on the Graphene shifted, pattern form as shown in Figure 4, in positive pole, in electrode and negative pole, electrode spacing is 6mm, the long 108mm of electrode in electrode and negative pole in positive pole, wide 1mm, totally 15, positive bus bar and the wide 8mm of negative bus bar, silver slurry thickness 25 μm;
3, the electrode layer printed is placed in baking oven to toast, make the solidification of silver slurry, baking temperature is 130 DEG C, and the time is 40min.
Initial temperature is room temperature (22 DEG C), in such cases, the positive electrode of electrode layer and negative electrode are connected by lead-in wire respectively the both positive and negative polarity of 5V power supply, after tested, within 60 seconds, can reach stable state, now the mean temperature of heating film can reach about 77.5 DEG C (room temperature is 22 DEG C).
The average heating power using heating film during 3.7V power voltage supply is 1500w/m 2left and right.
Preferably, following steps are carried out further:
4, the OCA glue of area 150mm × 150mm thickness 50 μm and PET of the same area are fit together;
5, use PET/OCA that laser cutting device is posting to open square opening, hole size is 5mm × 5mm, and after the position of perforate will ensure that this PET/OCA and electrode layer case are fitted, bus bar termination exposes the electrode of 5mm × 5mm;
6, to behind good position, PET/OCA and electrode layer are fitted;
7, the electrode exposed at aperture goes out to make lead-in wire;
In such cases, recording heating film resistance is 2.7 Ω, lead-in wire is connected respectively the both positive and negative polarity of 5V power supply, after tested, within 60 seconds, stable state can be reached, Figure 11 shows that the heating film Temperature Distribution photo using thermal infrared imager shooting, now the mean temperature of heating film can reach about 66 DEG C (room temperature is 22 DEG C).
Test result shows, and the average heating power using heating film during 3.7V power voltage supply is 1300w/m 2left and right, and when voltage is 3.7V, use traditional heating film average heating power without interior electrode to be 5w/m 2left and right, reach the identical heating effect of heating film newly-designed with us and use voltage to be increased to about 60V, this is considerably beyond human safety voltage.
Embodiment 2:
The present embodiment adopts two layer graphenes as the conductive layer of heating film, and electrode layer adopts the printing of silver slurry.
1, at the PET (the first insulating barrier) of area 120mm × 120mm thickness 125 μm, above transfer two layer graphene is as conductive layer, and Graphene is overdoping, and sheet resistance is 120 Ω/;
2, use screen printing apparatus to print ag paste electrode layer on conductive layer shift, pattern form as shown in Figure 10, busbar outside diameter 96mm, interior electrode spacing is 6mm, wide 1mm, the wide 8mm of busbar, silver-colored starches thickness 25 μm;
3, the electrode pattern printed is placed in baking oven to toast, make the solidification of silver slurry, baking temperature is 130 DEG C, and the time is 40min.
In such cases, lead-in wire is connected respectively the both positive and negative polarity of 5V power supply, after tested, 60S can reach stable state, and now the mean temperature of heating film can reach about 137.7 DEG C (initial temperature is room temperature 22 DEG C).
Test result shows, the electrode design scheme using us to invent, and the average heating power using heating film during 3.7V power voltage supply is 3168w/m 2left and right.
Preferably, following steps are carried out further:
4, the OCA glue of area 120mm × 120mm thickness 50 μm and PET of the same area are fit together;
5, use PET/OCA that laser cutting device is posting to open square opening, hole size is 5mm × 5mm, and after the position of perforate will ensure that this PET/OCA and electrode layer are fitted, bus bar termination exposes the electrode of 5mm × 5mm;
6, to behind good position, PET/OCA and electrode layer are fitted;
7, the electrode exposed at aperture goes out to make lead-in wire;
In such cases, recording heating film resistance is 2 Ω, lead-in wire is connected respectively the both positive and negative polarity of 5V power supply, after tested, 40S clock can reach stable state, Figure 12 shows that the heating film Temperature Distribution photo using thermal infrared imager shooting, now the mean temperature of heating film can reach about 90.9 DEG C (room temperature is 22 DEG C).
Test result shows, and the average heating power using heating film during 3.7V power voltage supply is 1300w/m 2left and right, and when voltage is 3.7V, use traditional heating film average heating power without interior electrode to be 5w/m 2left and right, reach the identical heating effect of heating film newly-designed with us and use voltage to be increased to about 60V, this is considerably beyond human safety voltage.
Embodiment 3:
Refer to Fig. 8, single-layer graphene is as the conductive layer of heating film, and preparation technology is as follows:
1, to be 150mm × 300mm thickness by the Copper Foil having grown Graphene (through overdoping, sheet resistance is 250 Ω/ to Graphene) and size the be PET of 125 μm is by together with UV glue laminating, and Copper Foil size is 140mm × 280mm, and thickness is 25 μm;
2, by UV adhesive curing, wavelength is 365nm, and energy is 1000mJ/cm 2;
3, screen printing apparatus is used to print peelable glue mask on the Copper Foil posted, pattern form as shown in Figure 8, now, is equivalent to heating film and is divided into two, form the effect of the two pieces of heating film series connection in left and right, the actual voltage that utilizes reduces by half, and interior electrode spacing is 3mm, long 108mm, wide 1mm, totally 32, the wide 8mm of busbar, copper thickness 25 μm;
4, the electrode pattern printed is placed in baking oven to toast, peelable glue is solidified, baking temperature is 135 DEG C, and the time is 40min;
5, the sample after baking is placed in the FeCl of 30% 3etch in etching liquid, etching terminates after washing and dries up, and takes the peelable glue of electrode surface off.
In such cases, recording heating film resistance is 1.7 Ω, lead-in wire is connected respectively the both positive and negative polarity (be 1.85V relative to the heating film of half) of 3.7V lithium ion battery, after tested, the temperature that 30S stablizes rear heating film can reach about 46 DEG C (room temperature is 22 DEG C).
Test result shows, and uses electrode design scheme of the present invention, and when using 3.7V voltage (voltage being applied to two electrodes is 1.85V) to power, the average heating power of heating film is 1521w/m 2left and right.
Preferably, following steps are carried out further:
6, the OCA glue of area 150mm × 300mm thickness 50 μm and PET of the same area are fit together;
7, use PET/OCA that laser cutting device is posting to open square opening, hole size is 5mm × 5mm, and after the position of perforate will ensure that this PET/OCA and electrode layer are fitted, bus bar termination exposes the electrode of 5mm × 5mm;
8, to behind good position, PET/OCA and electrode pattern are fitted;
9, the electrode exposed at aperture goes out to make lead-in wire;
Recording heating film resistance is 2.5 Ω, lead-in wire is connected respectively the both positive and negative polarity of 3.7V (the actual voltage that utilizes is equivalent to 1.85V) lithium ion battery, after tested, the temperature that 70S stablizes rear heating film can reach about 45 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=151).
Embodiment 4:
The present embodiment adopts ito thin film as the conductive layer of heating film, and silver slurry is as electrode, and design is with reference to Fig. 4, and preparation technology is as follows:
1, screen printing apparatus is used in sheet resistance for being of a size of 150mm × 150mm, sheet resistance is ito thin film (sheet resistance is 400 Ω/) the upper printing ag paste electrode pattern of 150 Ω, pattern form as shown in Figure 4, interior electrode spacing is 6mm, long 108mm, wide 1mm, totally 15, the wide 8mm of busbar, silver slurry thickness 25 μm;
2, the electrode pattern printed is placed in baking oven to toast, make the solidification of silver slurry, baking temperature is 130 DEG C, and the time is 40min.
3, the OCA glue of area 150mm × 150mm thickness 50 μm and PET of the same area are fit together;
4, use PET/OCA that laser cutting device is posting to open square opening, hole size is 5mm × 5mm, and after the position of perforate will ensure that this PET/OCA and electrode layer are fitted, bus bar termination exposes the electrode of 5mm × 5mm;
5, to behind good position, PET/OCA and electrode pattern are fitted;
6, the electrode exposed at aperture goes out to make lead-in wire;
In such cases, recording heating film resistance is 5 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 12V power supply, after tested, 55S can reach stable state, and now the mean temperature of heating film can reach about 92 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=70).
Embodiment 5:
The present embodiment transparency conducting layer adopts single-layer graphene (250 Ω/), electrode layer adopts 10 layer graphenes, preparation method is roughly the same with embodiment 1, difference is: adopt the mode continuing transfer Graphene on graphene film, be transferred to 11th layer, stop transfer, then 10 layer graphenes are above etched into the electrode layer of patterning, or adopt direct growth multi-layer graphene, make the electrode layer of patterning again, the pattern of the present embodiment electrode layer as shown in Figure 4, interior electrode spacing is 3mm, long 108mm, wide 1mm, totally 15, the wide 8mm of busbar, electrode (10 layer graphene) thick 35nm.
In such cases, recording heating film resistance is 2 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 1.5V power supply, after tested, 85S can reach stable state, and now the mean temperature of heating film can reach about 34 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=120).
Embodiment 6:
The present embodiment adopts 4 layer graphenes (62.5 Ω/) as conductive layer, the material of electrode layer is ITO, preparation method is roughly the same with embodiment 1, difference is: adopt when being printed in by ITO on conductive layer, and electrode patterning design is see Figure 10, and interior electrode spacing is 4mm, wide 1mm, totally 16, the wide 8mm of busbar, silver slurry thickness 25 μm.
In such cases, recording heating film resistance is 1.6 Ω, lead-in wire is connected respectively the both positive and negative polarity of 7.5V power supply, after tested, 100S can reach stable state, and now the mean temperature of heating film can reach about 103 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=90).
Embodiment 7:
Embodiment 7 is roughly the same with embodiment 3, and difference is: as shown in Figure 4, interior electrode spacing is 3mm to the structure of electrode layer, long 108mm, wide 1mm, totally 115, the wide 8mm of busbar, copper platinum thickness 25 μm.
In such cases, recording heating film resistance is 1.7 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 12V power supply, after tested, 100S can reach stable state, and now the mean temperature of heating film can reach about 226 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=32).
Embodiment 8:
Embodiment 8 is roughly the same with embodiment 1, and difference is: electrode layer is made up of Copper Foil, and as shown in Figure 10, interior electrode spacing is 2mm to electrode layer structure, long 108mm, wide 1mm, totally 16, the wide 8mm of busbar, copper thickness 25 μm.Using single-layer graphene as the sheet resistance of the conductive layer of material be 250 Ω/.
In such cases, recording heating film resistance is 2 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 3.7V power supply, after tested, 30S can reach stable state, and now the mean temperature of heating film can reach about 143.8 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=89).
Embodiment 9:
Positive electrode and negative electrode are provided separately the two sides in conductive layer by the present embodiment employing, positive electrode and negative electrode conductive layer projection as shown in Figure 4, the material of conductive layer adopts single-layer graphene (sheet resistance is 250 Ω/), the Graphene of electrode employing 5-10 layer or thickness are the Copper Foil of 10-30 μm, and wherein, positive and negative adjacent inner electrodes spacing is 4mm, long 108mm, wide 1mm, totally 15, the wide 8mm of busbar.
In such cases, recording heating film resistance is 2.1 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 7.5V power supply, after tested, 30S can reach stable state, and now the mean temperature of heating film can reach about 210 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=134).
Embodiment 10:
Embodiment 10 is roughly the same with embodiment 3, and difference is: as shown in Figure 8, conductive layer adopts 6 layer graphenes (sheet resistance is 41.6 Ω/) to the structure of electrode layer, and electrode layer is made up of Copper Foil.Interior electrode spacing is 3mm, wide 1mm, totally 9, the wide 8mm of busbar, copper thickness 25 μm.
In such cases, recording heating film resistance is 1.9 Ω, lead-in wire is connected respectively the both positive and negative polarity of 1.5V power supply, after tested, 30S can reach stable state, and now the mean temperature of heating film can reach about 86.3 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=107).
Embodiment 11:
Embodiment 11 is roughly the same with embodiment 1, and difference is: interior electrode and busbar adopt different materials, and metal platinum is as the material of busbar and the Graphene of the 10 layers material as interior electrode.Single-layer graphene is as the material (sheet resistance is 250 Ω/) of transparency conducting layer.As shown in Figure 4, in Graphene, electrode spacing is 5mm to the structure of electrode layer, long 108mm, wide 1mm, totally 32, the wide 8mm of busbar, thickness 25 μm.
In such cases, recording heating film resistance is 1.9 Ω, and lead-in wire is connected respectively the both positive and negative polarity of 12V power supply, after tested, 30S can reach stable state, and now the mean temperature of heating film can reach about 243 DEG C (room temperature is 22 DEG C), coincidence formula T=kU 2/ d 2r+t (K=96).
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a knee-pad, is characterized in that, comprise knee pad body and be arranged at the heating film in described knee pad body, described heating film comprises:
First insulating barrier;
Conductive layer, is formed at the surface of described first insulating barrier;
Electrode layer, be formed at the surface of described conductive layer and be electrically connected with described conductive layer, described electrode layer comprises positive electrode and negative electrode, described positive electrode comprises positive bus bar and electrode in multiple positive poles that described positive bus bar is extended, described negative electrode comprises negative bus bar and electrode in multiple negative poles that described negative bus bar is extended, and in described positive pole, in electrode and described negative pole, electrode is arranged alternately and spaced; And
Second insulating barrier, is formed at the surface of described electrode layer;
Described knee-pad also comprises the connecting line be electrically connected with the electrode layer of described heating film.
2. knee-pad according to claim 1, it is characterized in that, described positive bus bar and described negative bus bar are linear and be arranged in parallel, in multiple described positive pole, electrode extends to described negative bus bar near the side of described negative bus bar from described positive bus bar, and in multiple described negative pole, electrode extends to described positive bus bar near the side of described positive bus bar from described negative bus bar.
3. knee-pad according to claim 1, it is characterized in that, described positive bus bar and described negative bus bar are linear, described negative bus bar and described positive bus bar interval are arranged and described negative bus bar extends along the bearing of trend of described positive bus bar, in described positive pole, electrode extends to described negative bus bar bending from described positive bus bar, and in described negative pole, electrode extends to described positive bus bar bending from described negative bus bar.
4. knee-pad according to claim 1, it is characterized in that, described positive bus bar and described negative bus bar are arc and interval is arranged, in described positive pole, the inner side of electrode negative bus bar described in side direction in described positive bus bar extends, and in described negative pole, the inner side of electrode positive bus bar described in side direction in described negative bus bar extends.
5. knee-pad according to claim 1, it is characterized in that, described heating film also comprises the auxiliary electrode layer be arranged between described first insulating barrier and described conductive layer, described auxiliary electrode layer is electrically connected with described conductive layer, described auxiliary electrode layer comprises auxiliary positive electrode and auxiliary negative electrode, described auxiliary positive electrode comprises auxiliary positive busbar and electrode in multiple auxiliary positive that described auxiliary positive busbar extends, described auxiliary negative electrode comprises auxiliary negative busbar and electrode in multiple auxiliary negative that described auxiliary negative busbar extends, in described auxiliary positive, in electrode and described auxiliary negative, electrode is arranged alternately and spaced.
6. knee-pad according to claim 5, it is characterized in that, in the auxiliary positive of described auxiliary electrode layer in electrode and described auxiliary negative electrode in the projection of described conductive layer and the positive pole of described electrode layer in electrode and described negative pole electrode mutually stagger in the projection of described conductive layer.
7. knee-pad according to claim 1, it is characterized in that, described heating film also comprises the first glue-line and the second glue-line, and described first glue-line is arranged between described first insulating barrier and described conductive layer, and described second glue-line is arranged between described electrode layer and described second insulating barrier.
8. knee-pad according to claim 1, is characterized in that, described positive electrode has multiple, multiple described positive electrode series connection;
And/or described negative electrode has multiple, multiple described negative electrode series connection.
9. knee-pad according to claim 1, it is characterized in that, described knee-pad also comprises controller and wireless communicator, described controller is electrically connected with described electrode layer, described wireless communicator can receive control instruction, and sending described control instruction to described controller, described controller controls the heating of described heating film according to described control instruction.
10. a knee-pad, is characterized in that, comprise knee pad body and be arranged at the heating film in described knee pad body, described heating film comprises:
First insulating barrier;
First electrode layer, is formed at the surface of described first insulating barrier, and described first electrode layer comprises positive electrode, and described positive electrode comprises positive bus bar and electrode in multiple positive poles that described positive bus bar is extended,
Conductive layer, is formed at the surface of described first electrode layer, and described conductive layer is electrically connected with described first electrode layer;
The second electrode lay, be formed at the surface of described conductive layer and be electrically connected with described conductive layer, described the second electrode lay comprises negative electrode, described negative electrode comprises negative bus bar and electrode in multiple negative poles that described negative bus bar is extended, and in described positive pole, in electrode and described negative pole, electrode to be arranged alternately and spaced in the projection of described conductive layer; And
Second insulating barrier, is formed at the surface of described the second electrode lay;
Described knee-pad also comprises the connecting line be electrically connected with the first electrode layer and the second electrode lay of described heating film.
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CN105465874A (en) * 2015-05-29 2016-04-06 冯欣悦 Heating piece
CN105466005A (en) * 2015-05-29 2016-04-06 冯欣悦 Foot tub

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CN102256394A (en) * 2011-04-28 2011-11-23 上海科特高分子材料有限公司 Electric heating element and manufacturing method thereof
CN204908027U (en) * 2015-05-29 2015-12-30 冯欣悦 Knee pad

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Publication number Priority date Publication date Assignee Title
CN2633039Y (en) * 2003-08-12 2004-08-18 刘键 Electric heating sleeveless sweater
JP2008041298A (en) * 2006-08-02 2008-02-21 Matsushita Electric Ind Co Ltd Flexible ptc heating body
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* Cited by examiner, † Cited by third party
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CN105465874A (en) * 2015-05-29 2016-04-06 冯欣悦 Heating piece
CN105466005A (en) * 2015-05-29 2016-04-06 冯欣悦 Foot tub

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