CN104425088A - Over-current protection apparatus and battery assembly using same - Google Patents
Over-current protection apparatus and battery assembly using same Download PDFInfo
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- CN104425088A CN104425088A CN201310363519.1A CN201310363519A CN104425088A CN 104425088 A CN104425088 A CN 104425088A CN 201310363519 A CN201310363519 A CN 201310363519A CN 104425088 A CN104425088 A CN 104425088A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
An over-current protection apparatus and a battery assembly using the same. The over-current protection apparatus comprises a positive temperature coefficient component, which is provided with a first surface and a second surface, in an opposite manner, and a circumferential end; a first electrode layer and a second electrode layer, which are respectively and successively connected to the first surface and the second surface of the positive temperature coefficient component; a first conductive wire and a second conductive wire, which are respectively and successively connected to the first electrode layer and the second electrode layer; and a first heat dissipating layer and a second heat dissipating layer, which are formed by a heat dissipating electrical-insulation material with a thermal-conductive coefficient being higher than 1.7 W/mK. The first conductive wire and the second conductive wire are respectively provided with a first end part and a second end part, wherein the first end part is overlapped with the positive temperature coefficient component and the second end part is extended from the first end part and is stretched out from the circumferential end of the positive temperature coefficient component. The first heat dissipating layer and the second heat dissipating layer are respectively and successively connected to and wrap the first electrode layer and the second electrode layer and first ends of the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer and the first ends of the first conductive wire and the second conductive wire are coated respectively by the first heat dissipating layer and the second heat dissipating layer. The battery assembly comprises the over-current protection apparatus and a cell unit electrically connected thereto.
Description
Technical field
The present invention relates to a kind of overcurrent protective device and use the battery component of this device; particularly relate to one and comprise positive temperature coefficient (positive temperature coefficient, be called for short PTC) element and by the heat dissipating layer there is a heat dissipation electrical insulating material (heat dissipating and electrically insulative material) being greater than the conductive coefficient of 1.7W/mK forming.
Background technology
Positive temperature coefficient element, and can as overcurrent protective device owing to having positive temperature coefficient effect, such as resettable fuse (resettable fuse).Overcurrent protective device comprises a positive temperature coefficient element, and is formed in first and second electrode on two corresponding surfaces of this positive temperature coefficient element.
United States Patent (USP) the 4th, 255, No. 698 disclose a kind of rechargeable battery, comprise multiple battery unit, and to be electrically connected with described battery unit by series system and to have the ptc device resisting the function of overcurrent between described battery unit charge period.
See Fig. 1; United States Patent (USP) the 5th; 801; No. 612 battery components 8; comprise multiple battery unit 82,83; and the ptc device 81 that protects described battery unit 82,83 under overheated and overcurrent condition, this ptc device 81 is electrically connected with described battery unit 82,83 by series system.This ptc device 81 comprises a positive temperature coefficient element 811, and is connected to first and second electrode 812,813 on two corresponding surfaces of this positive temperature coefficient element 811.
Because charging current is higher, described battery unit 82,83 can complete charging sooner, therefore wishes the maintenance electric current of ptc device 81 (hold current) to be improved.So-called " maintenance electric current " (or be called by electric current, pass current) be represent the maximum stable electric current (maximumsteady current) that can not be caused escape (trip) by ptc device.In theory, the maintenance electric current that increase ptc device 81 can by increasing the surface area of this ptc device 81.But the increase of surface area will inevitably increase the overall dimensions of this battery component 8, and the trend with regard to current electronic product microminiaturization is disadvantageous.
Summary of the invention
The first object of the present invention is to provide a kind of overcurrent protective device that can overcome the shortcoming of foregoing prior art.
Overcurrent protective device of the present invention, comprises:
One positive temperature coefficient element, has first and second surface of opposition, and one week end;
First and second electrode layer, be connected in order respectively this first and second surface;
First and second conductive lead wire, is connected to this first and second electrode layer respectively in order, and has a first end and the second end respectively; This first end is overlapping with this positive temperature coefficient element, and this second end is extended by this first end and exceeds the Zhou Duan of this positive temperature coefficient element; And
First and second heat dissipating layer be made up of a heat dissipation electrical insulating material, connects in order respectively and is coated on the first end of this first and second electrode layer and this first and second conductive lead wire; Wherein, this heat dissipation electrical insulating material has the conductive coefficient that is greater than 1.7W/mK.
The first object of the present invention can also adopt following technological means to realize further.
This heat dissipation electrical insulating material is selected from by following formed group: epoxies composite material, acrylic compounds composite material, and polyesters composite material.
This positive temperature coefficient element formed by a positive temperature coefficient constituent comprising a conductive particle filler and a polymer system, this polymer system contains a host polymer unit and a strengthening polyolefin, and this host polymer unit comprises a basic polyolefin and optionally a graft type polyolefin; This basic polyolefin has a melt flow rate between 10g/10min to 100g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238; This strengthening polyolefin has a melt flow rate between 0.01g/10min to 1.0g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238.
This strengthening polyolefin has one between 600,000g/mole to 1, the weight average molecular weight between 500,000g/mole.
This basic polyolefin has a weight average molecular weight between 50,000g/mole to 300,000g/mole.
This basic polyolefin and this strengthening polyolefin are high density polyethylene (HDPE).
This graft type polyolefin is the high density polyethylene (HDPE) of carboxylic acid anhydrides grafting.
This conductive particle filler is selected from following formed group: titanium carbide, zirconium carbide, vanadium carbide, niobium carbide, ramet, chromium carbide, molybdenum carbide, tungsten carbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, surface degree nickel glass marble, plating nickel on surface graphite, titanium tantalum solid solution, tungsten titanium tantalum chromium solid solution, tungsten tantalum solid solution, tungsten titanium tantalum niobium solid solution, tungsten titanium tantalum solid solution, tungsten titanium solid solution, tantalum niobium solid solution and aforesaid combination.
The second object of the present invention is to provide a kind of battery component comprising aforementioned overcurrent protective device.
So battery component of the present invention, comprises:
One battery unit; And
One overcurrent protective device be electrically connected with this battery unit, and it comprises:
One positive temperature coefficient element, has first and second surface of opposition, and one week end;
First and second electrode layer, be connected in order respectively this first and second surface;
First and second conductive lead wire, is connected to this first and second electrode layer respectively in order, and has a first end and the second end respectively; Wherein, this first end is overlapping with this positive temperature coefficient element, and this second end is extended by this first end and exceeds the Zhou Duan of this positive temperature coefficient element; And
First and second heat dissipating layer be made up of a heat dissipation electrical insulating material, connects in order respectively and is coated on the first end of this first and second electrode layer and this first and second conductive lead wire;
Wherein, this heat dissipation electrical insulating material has the conductive coefficient that is greater than 1.7W/mK.
The second object of the present invention can also adopt following technological means to realize further.
This heat dissipation electrical insulating material is selected from by following formed group: epoxies composite material, acrylic compounds composite material, and polyesters composite material.
Beneficial effect of the present invention is: overcurrent protective device of the present invention comprises first and second heat dissipating layer that the heat dissipation electrical insulating material that is greater than 1.7W/mK by conductive coefficient is formed; this overcurrent protective device under the prerequisite not increasing surface area, can reach the object promoting and keep electric current.
Accompanying drawing explanation
Fig. 1 is a schematic diagram, and United States Patent (USP) the 5th is described, the battery component disclosed in 801, No. 612;
Fig. 2 is a part of profile, and the preferred embodiment of battery component of the present invention is described;
Fig. 3 is an experimental data figure, illustrates at-20 DEG C, the relation between the maintenance electric current of the test sample of conductive coefficient and embodiment 1 to 3 and comparative example 1 to 5;
Fig. 4 is an experimental data figure, illustrates at 23 DEG C, the relation between the maintenance electric current of the test sample of conductive coefficient and embodiment 1 to 3 and comparative example 1 to 5; And
Fig. 5 is an experimental data figure, illustrates at 60 DEG C, the relation between the maintenance electric current of the test sample of conductive coefficient and embodiment 1 to 3 and comparative example 1 to 5.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Before the present invention is described in detail, should be noted that in the following description content, similar element represents with identical numbering.
Fig. 2 describes the preferred embodiment of battery component of the present invention.This battery component, comprises two battery units 51,52, and the overcurrent protective device 100 that is electrically connected with described battery unit 51,52 in the mode of series connection.
This overcurrent protective device 100 comprises: one has first and second surface of opposition and the positive temperature coefficient element 1 of one week end; be connected to first and second electrode layer 21,22 on this first and second surface respectively in order; and be connected to first and second conductive lead wire 31,32 of this first and second electrode layer 21,22 respectively in order, and first and second heat dissipating layer 41,42 be made up of a heat dissipation electrical insulating material.First and second conductive lead wire 31,32 has a first end 311,321 and the second end 312,322 respectively; Wherein, this first end 311,321 is overlapping with this positive temperature coefficient element 1, and this second end 312,322 is extended by this first end 311,321 and exceeded the Zhou Duan of this positive temperature coefficient element 1; And first and second heat dissipating layer 41,42 to be made up of a heat dissipation electrical insulating material, connect in order respectively and be coated on the first end 311,321 of this first and second electrode layer 21,22 and this first and second conductive lead wire 31,32.This heat dissipation electrical insulating material has the conductive coefficient that is greater than 1.7W/mK.
The example of this heat dissipation electrical insulating material include, but are not limited to: heat conductivity binder (thermal conductive adhesive), heat conductivity adhesive plaster (tape), and heat conductivity film (film).Preferably, this heat dissipation electrical insulating material is selected from by following formed group: epoxies composite material (epoxy-based composite material), acrylic compounds composite material (acrylic-based composite material), and polyesters composite material (polyester-based composite material).
Preferably, this positive temperature coefficient element 1 comprises a polymer system 12 by one and a positive temperature coefficient constituent being scattered in the conductive particle filler 11 of this polymer system 12 formed.This polymer system 12 is containing a host polymer unit and a strengthening polyolefin.This host polymer unit comprises a basic polyolefin and an optionally graft type polyolefin.This basic polyolefin has a melt flow rate between 10g/10min to 100g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238; This strengthening polyolefin has a melt flow rate between 0.01g/10min to 1.0g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238.
Preferably, this basic polyolefin has a weight average molecular weight between 50,000g/mole to 300,000g/mole, and this strengthening polyolefin has one between 600,000g/mole to 1, the weight average molecular weight between 500,000g/mole.
Preferably, this basic polyolefin and this strengthening polyolefin are the high density polyethylene (HDPE) (high density polyethylene is called for short HDPE) with Different Weight mean molecule quantity.
Preferably, this graft type polyolefin is carboxylic acid anhydrides graft type high density polyethylene (HDPE).This graft type polyolefin is for promoting the cohesive force of this positive temperature coefficient element 1 to this first and second electrode layer 21,22.
Preferably, this host polymer unit accounts for 50 to the 95wt% of this polymer system 12 weight, and this strengthening polyolefin accounts for 5 to the 50wt% of this polymer system 12 weight.More preferably, this host polymer unit accounts for 75 to the 95wt% of this polymer system 12 weight, and this strengthening polyolefin accounts for 5 to the 25wt% of this polymer system 12 weight.
Preferably, this strengthening polyolefin accounts for 0.5 to the 10wt% of this positive temperature coefficient element 1 weight, this host polymer unit accounts for 5 to the 20wt% of this positive temperature coefficient element 1 weight, this conductive particle filler 11 accounts for 70 to the 90wt% of this positive temperature coefficient element 1 weight, and best, this strengthening polyolefin accounts for 0.5 to the 6wt% of this positive temperature coefficient element 1 weight, this host polymer unit accounts for 9 to the 18wt% of this positive temperature coefficient element 1 weight, and this conductive particle filler 11 accounts for the 76-90wt% of this positive temperature coefficient element 1 weight.
Preferably, this conductive particle filler 11 is selected from following formed group: titanium carbide, zirconium carbide, vanadium carbide, niobium carbide, ramet, chromium carbide, molybdenum carbide, tungsten carbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, plating nickel on surface glass marble (nickel-metallized glass beads), plating nickel on surface graphite, titanium tantalum solid solution (Ti-Ta solid solution), tungsten titanium tantalum chromium solid solution, tungsten tantalum solid solution, tungsten titanium tantalum niobium solid solution, tungsten titanium tantalum solid solution, tungsten titanium solid solution, tantalum niobium solid solution and aforesaid combination.More preferably, this conductive particle filler 11 formed by nickel or titanium disilicide.
The present invention will be described further with regard to following examples, but it is to be understood that this embodiment is only and illustrates use, and should not be interpreted as restriction of the invention process.
< embodiment >
< embodiment 1 (E1) >
Get 4g as the polyolefinic high density polyethylene (HDPE) of this strengthening (purchased from Ticona company, marque: GHR8110, weight average molecular weight 600, 000g/mole, at 230 DEG C, M.F.I. (melt flow rate) (for 0.96g/10min) under 12.6kg, 9g as the high density polyethylene (HDPE) of this basic polyolefin (purchased from Formosa plastic Corp., marque: HDPE9002, weight average molecular weight 150, 000g/mole, at 230 DEG C, M.F.I under 12.6kg is 45g/10min), 9g as this graft type polyolefinic unsaturated carboxylic acid graft type high density polyethylene (HDPE) (purchased from Dupont company, marque: MB100D, weight average molecular weight 80, 000g/mole, at 230 DEG C, M.F.I. under 12.6kg is 75g/10min), with 178g as the nickel powder of this conductive particle filler (purchased from Novamet SpecialtyProducts company, marque: N525) add in a Brabender mixing roll mixing.Refining temperature is 200 DEG C; Mixing speed is 50rpm; Pressurization weight is 5kg; Mixing time is 10 minutes.
The mixture of mixing rear gained is carried out hot pressing, to form the positive temperature coefficient element thin slice that a thickness is 0.43mm, wherein hot pressing temperature is 200 DEG C, hot pressing time is 4 minutes, hot pressing pressure is 80kg/cm
2.
First and second surface of this positive temperature coefficient element thin slice will be fitted in respectively as two Copper Foils of first and second electrode layer 21,22, and in 200 DEG C, 80kg/cm
2under carry out hot pressing 4 minutes to form the positive temperature coefficient laminate of a sandwich structure.This positive temperature coefficient laminate is cut into multiple testing wafer being of a size of 4.5mm × 3.2mm, and take total radiation dosage as cobalt-60 source irradiation of 130kGy by each testing wafer.
With welding material, first and second conductive lead wire 31,32 is individually fixed in first and second electrode layer 21,22 of each testing wafer.By a heat dissipation electrical insulating material (purchased from T-Global Technology Co.; Ltd.; marque: Li98C; there is conductive coefficient 1.8W/mK) connect and the first end 311,321 of this first and second electrode layer 21,22 coated and this first and second conductive lead wire 31,32; to form this first and second heat dissipating layer 41,42 respectively on this first and second electrode layer 21,22, and form the test sample of small-sized belt (strap type) overcurrent protective device.
The average resistance measuring the test sample obtained by embodiment 1 is as shown in table 1.In table 1, " PE/m-PE " represents the basic polyolefin (PE) of this host polymer unit and this graft type polyolefin (m-PE), and " R " represents average resistance (ohm).
Positive temperature coefficient element 1 obtained by embodiment 1 comprises 2wt% and strengthens polyolefin, 9wt% host polymer unit (this basic polyolefin and the polyolefinic weight ratio of this graft type are 1:1) and 89wt% conductive particle filler 11.In addition, obtained polymer system 12 comprises 81.8wt% host polymer unit and 18.2wt% strengthens polyolefinic macromolecular composition.
< embodiment 2 and 3 (E2 and E3) >
Preparation method and the condition of embodiment 2 and 3 (E2 and E3) are similar to Example 1, and difference is in used heat dissipation electrical insulating material (see table 1).
Embodiment 2 heat dissipation electrical insulating material used is an epoxies composite material (purchased from T-Global Technology Co., Ltd., marque: A98AB, has conductive coefficient 2.5W/mK).
Embodiment 3 heat dissipation electrical insulating material used is a composite material comprising polyesters composite material and metallic film (purchased from T-Global Technology Co., Ltd., marque: PH3, has conductive coefficient 5W/mK).
The average resistance measuring the test sample obtained by embodiment 2 and 3 is as shown in table 1.
< comparative example 1 (CE1) >
Preparation method and the condition of comparative example 1 (CE1) are similar to Example 1, and difference is in and does not comprise heat dissipation electrical insulating material (see table 1) in comparative example 1.
The composition of this positive temperature coefficient element 1 is recorded in table 1, and measure the average resistance (as shown in table 1) of the test sample obtained by comparative example 1.
< comparative example 2 to 5 (CE2 to CE5) >
The preparation method of comparative example 2 to 5 (CE2 to CE5) and condition are similar to Example 1, and difference is in used heat dissipation electrical insulating material (see table 1).
Comparative example 2 heat dissipation electrical insulating material used is a polyester adhesive plaster (having conductive coefficient 0.3W/mK).
Comparative example 3 heat dissipation electrical insulating material used is an epoxies composite material (purchased from Wellunion Electronics Materials Co., Ltd., marque: CF-16, has conductive coefficient 0.6W/mK).
Comparative example 4 heat dissipation electrical insulating material used is an acrylic compounds composite material (purchased from T-Global Technology Co., Ltd., marque: Li98, has conductive coefficient 0.95W/mK).
Comparative example 5 heat dissipation electrical insulating material used is a phase-transition material (purchased from T-Global Technology Co., Ltd., marque: PC99, has conductive coefficient 1.5W/mK).
The composition of the positive temperature coefficient element 1 of comparative example 2 to 5 is recorded in table 1, and measures the average resistance (as shown in table 1) of the test sample obtained by comparative example 2 to 5.
< performance test >
Measure and keep electric current:
The test sample of embodiment 1 to 3 and comparative example 1 to 5 is carried out the measurement keeping electric current, to observe each test sample maximum stable electric current at different temperatures.
The maintenance electric current of described test sample at-20 DEG C, 23 DEG C and 60 DEG C, bestows alternating voltage 12V respectively and keeps not carrying out measurement 15 minutes escape.Test result is recorded in table 2 and Fig. 3 to 5.
Measure the escape time (time-to trip):
The test sample of embodiment 1 to 3 and comparative example 1 to 5 is carried out respectively at different temperatures the measurement of escape time.The definition of this escape time refers to that overcurrent protective device is issued to the time required for escape at the voltage fixed and a specific Tripping Current.The test of this escape time at-20 DEG C, 23 DEG C and 60 DEG C, bestows alternating voltage 12V and Tripping Current 15A respectively to each test sample.Test result is recorded in table 2.
Table 2
Fig. 3 to 5 is relations of the conductive coefficient of display heat dissipation electrical insulating material and the maintenance electric current of test sample respectively at-20 DEG C, 23 DEG C and 60 DEG C of embodiment 1 to 3 (comprising the heat dissipation electrical insulating material that conductive coefficient is greater than 1.7W/mK) and comparative example 1 to 5 (comprising the heat dissipation electrical insulating material that conductive coefficient is less than 1.7W/mK).
As shown in table 2 and Fig. 3 to 5, test result shows, and the overcurrent protective device of embodiment 1 to 3 can bear the maximum stable electric current larger compared with comparative example 1 to 5 at-20 DEG C, 23 DEG C and 60 DEG C to be passed through.
As shown in table 2, at-20 DEG C, 23 DEG C and 60 times, embodiment 1 to 3 and comparative example 1 to 5 all have the similar escape time.
In sum; first and second heat dissipating layer that overcurrent protective device of the present invention is formed by comprising the heat dissipation electrical insulating material that is greater than 1.7W/mK by conductive coefficient; namely the maintenance electric current of this overcurrent protective device can significantly be promoted when not increasing surface area, so really object of the present invention can be reached.
As described above, be only preferred embodiment of the present invention, and when not limiting scope of the invention process with this, the simple equivalence namely generally done according to claims of the present invention and description changes and modifies, and all still belongs to the scope that the present invention is contained.
Claims (10)
1. an overcurrent protective device, is characterized in that: it comprises:
One positive temperature coefficient element, has first and second surface of opposition, and one week end;
First and second electrode layer, be connected in order respectively this first and second surface;
First and second conductive lead wire, is connected to this first and second electrode layer respectively in order, and has a first end and the second end respectively; This first end is overlapping with this positive temperature coefficient element, and this second end is extended by this first end and exceeds the Zhou Duan of this positive temperature coefficient element; And
First and second heat dissipating layer be made up of a heat dissipation electrical insulating material, connects in order respectively and is coated on the first end of this first and second electrode layer and this first and second conductive lead wire; Wherein, this heat dissipation electrical insulating material has the conductive coefficient that is greater than 1.7W/mK.
2. overcurrent protective device according to claim 1, is characterized in that: this heat dissipation electrical insulating material is selected from by following formed group: epoxies composite material, acrylic compounds composite material, and polyesters composite material.
3. overcurrent protective device according to claim 1, it is characterized in that: this positive temperature coefficient element formed by a positive temperature coefficient constituent comprising a conductive particle filler and a polymer system, this polymer system contains a host polymer unit and a strengthening polyolefin, and this host polymer unit comprises a basic polyolefin and an optionally graft type polyolefin; This basic polyolefin has a melt flow rate between 10g/10min to 100g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238; This strengthening polyolefin has a melt flow rate between 0.01g/10min to 1.0g/10min measured under 230 DEG C with 12.6Kg pressure according to ASTMD-1238.
4. overcurrent protective device according to claim 3, is characterized in that: this strengthening polyolefin has one between 600,000g/mole to 1, the weight average molecular weight between 500,000g/mole.
5. overcurrent protective device according to claim 3, is characterized in that: this basic polyolefin has a weight average molecular weight between 50,000g/mole to 300,000g/mole.
6. overcurrent protective device according to claim 3, is characterized in that: this basic polyolefin and this strengthening polyolefin are high density polyethylene (HDPE).
7. overcurrent protective device according to claim 3, is characterized in that: this graft type polyolefin is the high density polyethylene (HDPE) of carboxylic acid anhydrides grafting.
8. overcurrent protective device according to claim 3, it is characterized in that: this conductive particle filler is selected from following formed group: titanium carbide, zirconium carbide, vanadium carbide, niobium carbide, ramet, chromium carbide, molybdenum carbide, tungsten carbide, titanium nitride, zirconium nitride, vanadium nitride, niobium nitride, tantalum nitride, chromium nitride, titanium disilicide, zirconium disilicide, niobium disilicide, tungsten silicide, gold, silver, copper, aluminium, nickel, surface degree nickel glass marble, plating nickel on surface graphite, titanium tantalum solid solution, tungsten titanium tantalum chromium solid solution, tungsten tantalum solid solution, tungsten titanium tantalum niobium solid solution, tungsten titanium tantalum solid solution, tungsten titanium solid solution, tantalum niobium solid solution and aforesaid combination.
9. a battery component, is characterized in that: it comprises:
One battery unit; And
One overcurrent protective device be electrically connected with this battery unit, and it comprises:
One positive temperature coefficient element, has first and second surface of opposition, and one week end;
First and second electrode layer, be connected in order respectively this first and second surface;
First and second conductive lead wire, is connected to this first and second electrode layer respectively in order, and has a first end and the second end respectively; This first end is overlapping with this positive temperature coefficient element, and this second end is extended by this first end and exceeds the Zhou Duan of this positive temperature coefficient element; And
First and second heat dissipating layer be made up of a heat dissipation electrical insulating material, connects in order respectively and is coated on the first end of this first and second electrode layer and this first and second conductive lead wire; Wherein, this heat dissipation electrical insulating material has the conductive coefficient that is greater than 1.7W/mK.
10. battery component according to claim 9, is characterized in that: this heat dissipation electrical insulating material is selected from by following formed group: epoxies composite material, acrylic compounds composite material, and polyesters composite material.
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| CN109841364A (en) * | 2017-11-24 | 2019-06-04 | 富致科技股份有限公司 | PTC circuit protective device and preparation method thereof |
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| CN107732055A (en) * | 2016-08-10 | 2018-02-23 | 深圳市沃特玛电池有限公司 | Electric automobile chassis device and cell |
| CN109841364A (en) * | 2017-11-24 | 2019-06-04 | 富致科技股份有限公司 | PTC circuit protective device and preparation method thereof |
| TWI744625B (en) * | 2019-04-15 | 2021-11-01 | 富致科技股份有限公司 | PTC circuit protection device |
| CN114413191A (en) * | 2022-01-04 | 2022-04-29 | 东莞市信意铝制品有限公司 | Aluminium system LED fluorescent tube convenient to heat dissipation |
| CN114413191B (en) * | 2022-01-04 | 2024-02-06 | 东莞市信意铝制品有限公司 | Aluminum LED lamp tube convenient for heat dissipation |
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