CN104919670A - Protection element - Google Patents
Protection element Download PDFInfo
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- CN104919670A CN104919670A CN201480004548.1A CN201480004548A CN104919670A CN 104919670 A CN104919670 A CN 104919670A CN 201480004548 A CN201480004548 A CN 201480004548A CN 104919670 A CN104919670 A CN 104919670A
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- Prior art keywords
- temperature fuse
- protection component
- ptc element
- fuse parts
- current
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
- H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
- H01H2085/0283—Structural association with a semiconductor device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/12—Two or more separate fusible members in parallel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/103—Fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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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
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Ceramic Engineering (AREA)
- Power Engineering (AREA)
- Fuses (AREA)
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention provides a protection element capable of providing protection against excessive voltage and/or excessive current while enabling the flowing of a larger current. This protection element comprises a PTC element (18) including a laminar PTC element (12), a first conductive metal layer (14) located on one main surface of the laminar PTC element (12) and a second conductive metal layer (16) located on the other surface of the laminar PTC element, an insulating layer (20) located on the second conductive metal layer (16) of the PTC element (18), a temperature fuse member (22) located on the insulating layer (20), a first lead (24) connected to an edge of the temperature fuse member, and a second lead (26) connected to the other edge of the temperature fuse member, a part of the second lead (26) being electrically connected to the second conductive metal layer (16).
Description
Technical field
The present invention relates to the protection component being configured to there are PTC element and temperature fuse parts, more specifically relate to the protection component that electric device such as secondary battery is protected from excess current and/or excess voltage.In addition, the present invention relates to the protective circuit comprising this protection component.
Background technology
In the past, for making electric device be protected from excess current, temperature fuse element, current fuse element, polymer PTC device etc. were used.But, can in the secondary battery etc. of discharge and recharge, sometimes not only require to be protected from excess current, and in order to prevent overcharge from also requiring to be protected from excess voltage.
As the protection component making the electric devices such as secondary cell be protected from this excess current and/or excess voltage; following protection component is such as proposed; namely; substrate has low-melting-point metal parts (being equivalent to temperature fuse parts) and heater; by detecting that the detecting element of electric voltage exception is energized to heater; fusing-off temperature fuse part is carried out, to make circuitry cuts (with reference to patent documentation 1) by the heat produced by heater.
But; in above-mentioned such protection component; although be configured with resistive element (heater) and the temperature fuse under being in its thermal impact on ceramic substrate; but in element, the multiple temperature fuse of configuration becomes difficulty side by side according to this structure; thus there is the problem (such as, rated current is 15A degree in existing protection component) that cannot increase the rated capacity of electric current.Thus, in order to tackle the equipment needing big current of electric tool etc., utilizing single element to tackle, multiple such as 4 protection components must be used in a juxtaposed fashion, thus produce circuit and become complicated and miniaturization becomes the problem of difficulty.
At first technical literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 7-153367 publication
Summary of the invention
The problem that invention will solve
For this reason; the problem that the present invention will solve is to provide a kind of protection component; this protection component can provide the protection for excess current and/or excess voltage, even and if single element also can be utilized in the electric circuit flowing through larger current such as 30A or the electric current more than it suitably to protect electric circuit.
For solving the means of problem
In the 1st, the invention provides a kind of protection component, be configured to have:
PTC element, its 2nd conductive metal layer that there is stratiform PTC unit, be positioned at the 1st conductive metal layer on a first type surface of this stratiform PTC unit and be positioned on another first type surface of this stratiform PTC unit;
Insulating barrier, it is positioned on the 2nd conductive metal layer of above-mentioned PTC element;
Temperature fuse parts, it is positioned on above-mentioned insulating barrier; And
Be connected with one end of said temperature fuse part the 1st goes between and the 2nd going between of being connected with the other end of said temperature fuse part,
At this, a part for the 2nd lead-in wire is electrically connected with above-mentioned 2nd conductive metal layer.
Protection component of the present invention is characterized in that; make electric current flow to PTC element from switch element according to excess voltage and/or excess current; PTC element is made to become high temperature/high-impedance state thus; namely make PTC element carry out action, thus by the Joule heat produced by this PTC element, temperature fuse parts are fused.That is, in protection component of the present invention, temperature fuse parts are in the thermal impact of the PTC element being in operate condition.
Protection component of the present invention is configured to be had: PTC element, its 2nd conductive metal layer having stratiform PTC unit, be positioned at the 1st conductive metal layer on a first type surface of this stratiform PTC unit and be positioned on another first type surface of this stratiform PTC unit.In protection component of the present invention, PTC element is not particularly limited, and is preferably so-called polymer PTC device.Polymer PTC device can obtain as follows, namely, the electric conductive polymer constituent of conductive filler agent (such as nickel filler, carbon filler etc.) that extruding such as comprises polymer (such as polyethylene, polyvinylidene fluoride etc.) and disperses in this polymer, obtain the extrudate as stratiform PTC unit, and in two first type surface thermo-compressed conductive metal, obtain thus.If be those skilled in the art, then can select suitable PTC element according to the feature of protection component of the present invention and purposes.
PTC element of the present invention to have according to excess voltage and/or excess current action to high temperature/high-impedance state thus as the function of heater.In addition, PTC element of the present invention, except as except the function of heater, also has the function as the substrate for keeping temperature fuse parts etc.By being used as substrate by polymer PTC device, thus compare to the situation using ceramic substrate, the processing such as cut-out become easy, and the structure of protection component becomes simple in addition.And then without the need to configuring the resistive element as heater on substrate, substrate (i.e. PTC element) entirety is generated heat in fact equably, therefore can configure multiple temperature fuse parts on substrate.
Protection component of the present invention is configured to have the insulating barrier be positioned on the 2nd conductive metal layer of above-mentioned PTC element.2nd conductive metal layer of the 1st lead-in wire and PTC element is carried out electric insulation by this insulating barrier.By adopting this structure, thus after the fusing of temperature fuse parts, the stream that electric current can be made to flow to the 2nd lead-in wire from the 1st lead-in wire via PTC element cuts off.
Above-mentioned insulating barrier is formed by Ins. ulative material.As Ins. ulative material, be not particularly limited, but preferably list resin, pottery, silicone, insulating oil, paper etc.Particularly, the Ins. ulative material of preferred excellent thermal conductivity.By adopting the Ins. ulative material of excellent thermal conductivity, thus the Joule heat efficiency produced by PTC element can be conducted to temperature fuse parts more well.As the Ins. ulative material of this excellent thermal conductivity, be not particularly limited, but list pottery, silicone etc.
Above-mentioned insulating barrier may not cover the entirety of the 2nd conductive metal layer of PTC element, as long as the 2nd conductive metal layer via PTC element can be made after the fusing of temperature fuse parts to flow in failure of current between the lead-in wire (following 1st lead-in wire and the 2nd lead-in wire) at the two ends of temperature fuse parts, its shape and configuration are not particularly limited, and the part that such as insulating barrier can be configured to the 2nd conductive metal layer is exposed.Make a part for the 2nd conductive metal layer expose like this, thus the electrical connection of the 2nd conductive metal layer and the 2nd lead-in wire can be made to become easy.
The thickness of above-mentioned insulating barrier is not particularly limited, but can be 10 ~ 100 μm, is preferably 30 ~ 60 μm.Insulating barrier is thinner, and the Joule heat efficiency produced by PTC element more can be made to conduct to temperature fuse parts more well, is therefore preferably less than 60 μm.In addition, for making the electric insulation of temperature fuse parts and the 2nd conductive metal layer become more reliable, more than 30 μm are preferably.
Protection component of the present invention is configured to have the temperature fuse parts be positioned on above-mentioned insulating barrier.Preferably, these temperature fuse parts are connected with the lead-in wire (being called the 1st lead-in wire and the 2nd lead-in wire below) as terminal (electrode) at its two ends.This fuse part is formed by metal material such as Sn, Bi, Pb, Cd, In, Ga, the Zn etc. with given fusing point.If be those skilled in the art, then can consider the temperature the etc. during action of PTC element, the characteristic according to expecting suitably is selected, and obtains or make this temperature fuse parts.
Said temperature fuse part can configure multiple respectively in parallel on PTC element, such as 2 ~ 10, is preferably 2 ~ 4.By increasing the quantity of temperature fuse parts in parallel, thus the rated capacity of the electric current of protection component of the present invention can be made to increase.
Under said temperature fuse part is configured to be in the thermal impact of PTC element.That is, the Joule heat by being produced by the PTC element carrying out action is configured to and temperature fuse parts fuse.Preferably, temperature fuse parts entirety is configured on the insulating layer.By configuration like this, thus when excess voltage and/or excess current being detected, PTC element being switched on electric current, PTC element carries out action, the Joule heat that this PTC element of reason produces and temperature fuse parts are fused, can guarantee the cut-out of electric current.In addition, the be connected with one end of temperature fuse parts the 1st goes between, and is configured to the 2nd conductive metal layer that can not touch PTC element, is preferably configured to the connecting portion of fuse part and the 1st lead-in wire on insulating barrier.On the other hand, the be connected with one end of temperature fuse parts the 2nd goes between, and its part is electrically connected with the 2nd conductive metal layer of PTC element.By configuration like this, due to being cut off by insulating barrier from the 1st lead-in wire to the path of the 2nd lead-in wire of the 2nd conductive metal layer via PTC element, therefore after temperature fuse parts are fused, reliably can prevent streaming current between the 1st and the 2nd lead-in wire, and the electric current flowing through PTC element can be guaranteed.
In other embodiments, protection component of the present invention also has the 2nd temperature fuse parts be connected in series with PTC element.2nd temperature fuse parts both can be connected in series relative to the 1st temperature fuse parts and also can be connected in parallel, but were preferably connected in series.
Under above-mentioned 2nd temperature fuse parts are in the thermal impact of PTC element, when excess voltage and/or excess current being detected, PTC element be switched on electric current thus PTC element carries out action, the Joule heat that above-mentioned 2nd temperature fuse parts reason PTC element produces and being fused.By configuring this 2nd temperature fuse parts, thus the temperature fuse parts on PTC element (below also referred to as the 1st temperature fuse parts) can be made to be cut off by the Weak current (leakage current) also flowing into circuit from switch element via PTC element after fusing, become to make circuit and open a way completely.As the 2nd temperature fuse parts, enumerate adopt with above-mentioned 1st temperature fuse parts identical.
Above-mentioned 2nd temperature fuse parts both can identical from the 1st temperature fuse parts also can be different.When the 2nd temperature fuse parts are identical with the 1st temperature fuse parts, preferably the 2nd temperature fuse parts and the 1st temperature fuse parts are also connected in series, or regulate setting model such as with the distance of PTC element etc. and configure and make to be cut off after the 1st temperature fuse parts.In addition, when the 2nd temperature fuse parts are different from the 1st temperature fuse parts, preferably the 2nd temperature fuse parts have after the 1st temperature fuse parts by the characteristic fused.If be those skilled in the art, then suitably can select kind and the configuration of the 2nd temperature fuse parts according to the characteristic expected.
In further other mode, protection component of the present invention has the current fuse parts be connected with the 1st temperature fuse unit Series.These current fuse parts flow in circuit excess current when fuse.That is, by configuring this current fuse parts, circuit can be made thus to become more rapid and reliable from the protection excess current.If be those skilled in the art, then can suitably select current fuse parts used according to the characteristic expected.
In mode other further; protection component of the present invention has 2PTC element and is connected in series with this 2PTC element and is in the 3rd temperature fuse parts under the thermal impact of 2PTC element, and they and above-mentioned 1st temperature fuse parts (and being above-mentioned current fuse parts and the 2nd temperature fuse parts in case of presence) are connected in parallel.By adopting this formation, thus when above-mentioned 1st temperature fuse parts (and being above-mentioned current fuse parts and the 2nd temperature fuse parts in case of presence) fuse, the electric current commutation of wherein flowing is the circuit of above-mentioned 2PTC component side, the generation of the electric arc accompanied that can suppress fuse with above-mentioned fuse part.That is, the proof voltage of protection component of the present invention can be promoted.And then, after above-mentioned 1st temperature fuse parts (and being above-mentioned current fuse parts and the 2nd temperature fuse parts in case of presence) fusing, the electric current of reason commutation and Joule heat that the 2PTC element of action produces, above-mentioned 3rd temperature fuse parts are fused, and also can be cut off completely by the Weak current of 2PTC element.During the 3rd temperature fuse parts fusing, only flow micro-current in circuit, therefore, it is possible to safety cut-off.
In in the 2nd, the invention provides a kind of protective circuit, be configured to have:
Above-mentioned protection component of the present invention; And
Switch element, it is energized for the PTC element according to excess current and/or excess voltage to above-mentioned protection component.
In protective circuit of the present invention; in protection component of the present invention, such as the 1st lead-in wire is connected with power supply, and the 2nd lead-in wire is connected with protected device; 1st conductive metal layer is connected with switch element, and the 2nd conductive metal layer is connected with protected device via the 2nd lead-in wire.If create excess current and/or excess voltage; then be accompanied by this; switch element is to PTC element electrical current; PTC element movement is to high temperature/high-impedance state; the Joule heat that this PTC element of reason produces and temperature fuse parts are fused; thus circuit disconnects, protected device is protected.
In protective circuit of the present invention, as switch element, such as, list field effect transistor element (below also referred to as " FET ") etc.Wherein, due to PTC element electrical current can be given according to the exception of himself voltage, therefore particularly preferably FET.When using other switch elements, sometimes need detect excess voltage and/or excess current and make switch element start the mechanism of the energising to PTC element.
In in the 3rd; the invention provides a kind of electric device (such as secondary battery being configured to have above-mentioned protection component or protective circuit; especially being used as the secondary battery of various batteries of electric automobile, cleaner with no rope, electric tool, wireless base station, is specifically the secondary battery etc. of high voltage and/or high electric current).
Invention effect
Protection component of the present invention by multiple temperature fuse component configuration on PTC element, therefore can flow through the electric current of big current such as more than 30A, and circuit can be made to be protected from excess current and/or excess voltage.In addition, make PTC element and the 1st leading part electric insulation by insulating barrier, therefore after the fusing of temperature fuse parts, can reliably make to cut off via the stream of PTC element to the 2nd lead-in wire from the 1st lead-in wire.
Accompanying drawing explanation
Fig. 1 is the schematic side view of an execution mode of protection component of the present invention.
Fig. 2 is the schematic top of the protection component of Fig. 1.
Fig. 3 is the circuit diagram of the protective circuit schematically showing the protection component comprising Fig. 1.
Fig. 4 is the circuit diagram of the protective circuit schematically showing other execution modes comprising protection component of the present invention.
Fig. 5 is the circuit diagram of the protective circuit schematically showing other execution modes further comprising protection component of the present invention.
Fig. 6 is the circuit diagram of the protective circuit schematically showing another other execution modes further comprising protection component of the present invention.
Embodiment
Protection component of the present invention is explained with reference to accompanying drawing.But, should note: protection component of the present invention is not limited to illustrated example.
The schematic side view of an execution mode of protection component of the present invention shown in Figure 1; the schematic top of the protection component shown in Fig. 1 shown in Figure 2, and then the protective circuit utilizing equivalent electric circuit in figure 3 to schematically show the protection component comprising Fig. 1.In figure 3, the part of being surrounded by dotted line is equivalent to protection component of the present invention.
As shown in Figure 1 and Figure 2, the protection component 10 of present embodiment is configured to be had: PTC element 18, its 2nd conductive metal layer 16 having stratiform PTC unit 12, be positioned at the 1st conductive metal layer 14 on a first type surface of this stratiform PTC unit 12 and be positioned on another first type surface of this stratiform PTC unit 12; Insulating barrier 20, it is positioned on the 2nd conductive metal layer 16 of above-mentioned PTC element 18; And to be positioned on above-mentioned insulating barrier 20 and fuse part 22 under being in the thermal impact of PTC element 18 and be positioned at the 1st lead-in wire the 24 and the 2nd lead-in wire 26 at two ends of this fuse part 22.In addition, as shown in Figure 1, a 2nd lead-in wire part of 26 is electrically connected with the 2nd conductive metal layer 16 of PTC element 18, and the 2nd lead-in wire 26 also has the effect by the 2nd conductive metal layer 16 and the electrical connection of protected device concurrently.In addition, as shown in Figure 2, in the present embodiment, temperature fuse parts have 4, and these temperature fuse parts are connected to the 1st lead-in wire and the 2nd lead-in wire in the lump, but protection component of the present invention is not limited to this execution mode.Such as, each fuse part also branch can have the 1st independent lead-in wire and the 2nd lead-in wire, and temperature fuse also can be 2,3 or 5.
In this embodiment, such as, when creating excess voltage when between the contact a-b shown in Fig. 3, FET makes electric current flow between contact a-FET-contact c.PTC element 18 action (trip) due to this electric current thus heating, the temperature fuse parts 22 be under the thermal impact of PTC element 18 are fused due to this heat, electric current is cut off (but, micro-current can be flow through via PCT element).So, the protected device be connected with contact x and contact y is protected.
In the diagram, utilize equivalent electric circuit to schematically show other execution modes of protection component of the present invention.In the diagram, the part of being surrounded by dotted line is equivalent to protection component of the present invention.This execution mode also has the 2nd temperature fuse parts 30 be connected in series with PTC element 18 on the basis of the execution mode of Fig. 3.Under 2nd temperature fuse parts 30 are in the thermal impact of PTC element 18.That is, the 2nd temperature fuse parts 30 are fused by the Joule heat produced by the PTC element 18 of action.
In this embodiment, micro-current between the contact a-FET-contact c that temperature fuse parts 22 also can flow through via PTC element 18 after being cut off by the Joule heat produced by PTC element 18,2nd temperature fuse parts 30 fusing can be cut off by the heat of above-mentioned PTC element 18, can the open circuit completely of realizing circuit.In addition, about the configuration of the 2nd temperature fuse parts 30, as long as be connected in series with PTC element 18 and under being in the thermal impact of PTC element, be not limited to illustrated position.
In Figure 5, utilize equivalent electric circuit to schematically show other execution modes further of protection component of the present invention.In Figure 5, the part of being surrounded by dotted line is equivalent to protection component of the present invention.This execution mode also has the current fuse parts 40 be connected in series with temperature fuse parts 22 on the basis of the execution mode of Fig. 3.These current fuse parts 40 fuse rapidly when creating excess current, therefore, it is possible to make the protection for excess current become more rapid and reliable.In addition, about the configuration of current fuse parts 40, as long as connect with temperature fuse parts 22, be not particularly limited, but be preferably also connected in series with PTC element 18 as illustrated, also can cut off to make the micro-current that can flow through via PTC element 18.
In figure 6, utilize equivalent electric circuit to schematically show another other execution modes further of protection component of the present invention.In figure 6, the part of being surrounded by dotted line is equivalent to protection component of the present invention.This execution mode, on the basis of the execution mode of Fig. 5, has 2PTC element 50 and the 3rd temperature fuse parts 52 in parallel relative to temperature fuse parts 22 and current fuse parts 40.3rd temperature fuse parts 52 and 2PTC element 50 are connected in series and under being in the thermal impact of 2PTC element 50, but in fact not by the impact of the heat of PTC element 18.In this embodiment, for excess voltage temperature fuse parts 22 by during fusing or when due to excess current, current fuse parts 40 are by fusing, the part of the electric current flow through via temperature fuse parts 22 and current fuse parts 40 between contact d-e will commutation to the circuit of 2PTC element 50 side.Its result, the generation of electric arc when temperature fuse parts 22 or current fuse parts 40 fuse is suppressed.Then, the electric current between contact d-e all flow to 2PTC element 50, the 2PTC element 50 action thus heating, and the 3rd temperature fuse parts 52 are fused, and the micro-current flowing through 2PTC element 50 also cuts off.In addition, in this embodiment, about the configuration of each PTC element, current fuse parts and each temperature fuse parts, above-mentioned effect can be played separately as long as be connected to, just be not limited to illustrated example.To those skilled in the art, corresponding configuration can suitably be selected.
Utilizability in industry
Protection component of the present invention such as can as protection component of secondary cell etc. and in various electric device.
Symbol description
10 protection components
12 stratiform PTC unit
14 the 1st conductive metal layer
16 the 2nd conductive metal layer
18 PTC elements
20 insulating barriers
22 temperature fuse parts
24 the 1st lead-in wires
26 the 2nd lead-in wires
30 the 2nd temperature fuse parts
40 current fuse parts
50 2PTC elements
52 the 3rd temperature fuse parts
Claims (8)
1. a protection component, is configured to have:
PTC element, its 2nd conductive metal layer that there is stratiform PTC unit, be positioned at the 1st conductive metal layer on a first type surface of this stratiform PTC unit and be positioned on another first type surface of this stratiform PTC unit;
Insulating barrier, it is positioned on the 2nd conductive metal layer of above-mentioned PTC element;
Temperature fuse parts, it is positioned on above-mentioned insulating barrier; And
Be connected with one end of said temperature fuse part the 1st goes between and the 2nd going between of being connected with the other end of said temperature fuse part,
At this, a part for the 2nd lead-in wire is electrically connected with above-mentioned 2nd conductive metal layer.
2. protection component according to claim 1, is characterized in that,
2nd temperature fuse parts and PTC element are connected in series.
3. protection component according to claim 1 and 2, is characterized in that,
There is two or more in parallel respectively in said temperature fuse part and/or the 2nd temperature fuse parts.
4. the protection component according to any one of claims 1 to 3, wherein,
Above-mentioned protection component also has the current fuse parts be connected in series with said temperature fuse part.
5. a protective circuit, is configured to have:
Protection component according to any one of Claims 1 to 4; And
Switch element, it is energized for the PTC element according to excess current and/or excess voltage to above-mentioned protection component.
6. protective circuit according to claim 5, is characterized in that,
Above-mentioned switch element is field-effect transistor.
7. an electric device, is characterized in that, has the protection component according to any one of Claims 1 to 4 or the protective circuit described in claim 5 or 6.
8. electric device according to claim 7, is characterized in that,
Above-mentioned electric device is single rechargeable battery.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013003653 | 2013-01-11 | ||
| JP2013-003653 | 2013-01-11 | ||
| PCT/JP2014/050237 WO2014109364A1 (en) | 2013-01-11 | 2014-01-09 | Protection element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104919670A true CN104919670A (en) | 2015-09-16 |
Family
ID=51167011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480004548.1A Pending CN104919670A (en) | 2013-01-11 | 2014-01-09 | Protection element |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6417220B2 (en) |
| KR (1) | KR20150106416A (en) |
| CN (1) | CN104919670A (en) |
| TW (1) | TWI609384B (en) |
| WO (1) | WO2014109364A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811974A (en) * | 2019-05-09 | 2021-12-17 | 力特保险丝公司 | Circuit protection device with PTC element and secondary fuse |
| EP4006943A4 (en) * | 2019-07-22 | 2023-08-02 | Dexerials Corporation | Protective element and protective circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6497327B2 (en) * | 2016-01-19 | 2019-04-10 | 株式会社オートネットワーク技術研究所 | Power supply control device |
| KR20170116472A (en) | 2016-04-11 | 2017-10-19 | 주식회사 엘지화학 | Apparatus and method for protecting MOSFET relay using a voltage detector and signal fuse |
| US10446345B2 (en) * | 2018-01-09 | 2019-10-15 | Littelfuse, Inc. | Reflowable thermal fuse |
| CN208093500U (en) * | 2018-04-03 | 2018-11-13 | 厦门赛尔特电子有限公司 | A kind of high-tension fuse |
| CN108879591B (en) * | 2018-07-18 | 2020-02-11 | 深圳市沃特沃德股份有限公司 | Heavy current power supply protection circuit |
| US12040109B2 (en) | 2019-11-21 | 2024-07-16 | Littelfuse, Inc. | Circuit protection device with PTC device and backup fuse |
| JP2023040957A (en) * | 2021-09-10 | 2023-03-23 | デクセリアルズ株式会社 | Protection element and battery pack |
| JP2024024993A (en) * | 2022-08-10 | 2024-02-26 | ボーンズ株式会社 | Current cutoff device and charge/discharge control circuit |
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| US20100013591A1 (en) * | 2006-05-17 | 2010-01-21 | Hiroyuki Koyama | Protection Device |
| US8076751B2 (en) * | 2008-04-21 | 2011-12-13 | Littelfuse, Inc. | Circuit protection device including resistor and fuse element |
-
2014
- 2014-01-09 CN CN201480004548.1A patent/CN104919670A/en active Pending
- 2014-01-09 WO PCT/JP2014/050237 patent/WO2014109364A1/en active Application Filing
- 2014-01-09 KR KR1020157020892A patent/KR20150106416A/en not_active Application Discontinuation
- 2014-01-09 JP JP2014556436A patent/JP6417220B2/en active Active
- 2014-01-10 TW TW103100927A patent/TWI609384B/en not_active IP Right Cessation
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| JPH04328279A (en) * | 1991-04-25 | 1992-11-17 | Sanyo Electric Co Ltd | Battery device having protecting element |
| CN1240050A (en) * | 1996-12-05 | 1999-12-29 | 威克曼工厂股份有限公司 | Electrical fuse |
| CN1645665A (en) * | 1999-05-17 | 2005-07-27 | 松下电器产业株式会社 | Protective circuit and device for protecting secondary battery |
| US6462318B2 (en) * | 2000-05-17 | 2002-10-08 | Sony Chemicals Corp. | Protective element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113811974A (en) * | 2019-05-09 | 2021-12-17 | 力特保险丝公司 | Circuit protection device with PTC element and secondary fuse |
| EP4006943A4 (en) * | 2019-07-22 | 2023-08-02 | Dexerials Corporation | Protective element and protective circuit |
| US12068124B2 (en) | 2019-07-22 | 2024-08-20 | Dexerials Corporation | Protection element and protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014109364A1 (en) | 2014-07-17 |
| JP6417220B2 (en) | 2018-10-31 |
| TW201440084A (en) | 2014-10-16 |
| JPWO2014109364A1 (en) | 2017-01-19 |
| TWI609384B (en) | 2017-12-21 |
| KR20150106416A (en) | 2015-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180109 Address after: Tokyo, Japan Applicant after: Lite Electronics Co. Ltd. (Japan) Address before: Kanagawa County, Japan Applicant before: Tyco Electronics Corporation |
|
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20191022 |