WO2017061455A1 - 液濡れセンサー、スイッチ素子、バッテリシステム - Google Patents

液濡れセンサー、スイッチ素子、バッテリシステム Download PDF

Info

Publication number
WO2017061455A1
WO2017061455A1 PCT/JP2016/079596 JP2016079596W WO2017061455A1 WO 2017061455 A1 WO2017061455 A1 WO 2017061455A1 JP 2016079596 W JP2016079596 W JP 2016079596W WO 2017061455 A1 WO2017061455 A1 WO 2017061455A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch element
liquid
element according
reaction part
heating resistor
Prior art date
Application number
PCT/JP2016/079596
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕治 古内
吉弘 米田
幸市 向
和征 榊原
Original Assignee
デクセリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Priority to CN201680055764.8A priority Critical patent/CN108028154B/zh
Priority to KR1020187007373A priority patent/KR102024488B1/ko
Publication of WO2017061455A1 publication Critical patent/WO2017061455A1/ja

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • 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
    • 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
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to a liquid wetting sensor that detects liquid intrusion, a switch element that opens an electric circuit in response to liquid intrusion, and a battery system incorporating the switch element.
  • a battery pack In recent years, lithium ion secondary batteries have been adopted in many mobile phones, notebook PCs, and the like. Lithium ion secondary batteries have a high energy density, so in order to ensure the safety of users and electronic devices, a battery pack generally includes a number of protection circuits such as overcharge protection and overdischarge protection. In this case, the battery pack has a function of shutting off input / output of the battery pack.
  • the positive / negative electrode insulation fitting portion of the battery corrodes due to water wetting, the pressure inside the battery leaks, and there is a risk of causing a fire accident without the safety valve functioning properly.
  • Attaching a sticker that detects wet traces against water wetting and issuing a warning does not limit the use of the battery, so migration due to water on the circuit board There is a risk of circuit malfunction due to (insulation deterioration) or a short circuit. Moreover, there is a possibility that the same defect as described above may occur even when the electrolyte leaks due to battery abnormality.
  • a sensor that detects a liquid such as water is provided, and a protection circuit is activated by a signal transmitted from the sensor that detects water wetting.
  • a water leak sensor has been proposed that includes a detection unit composed of a pair of electrodes arranged opposite to each other on an insulating substrate (see, for example, Patent Document 2).
  • This water leak sensor controls the operation of the device when a signal is input to the control circuit due to leakage between the terminals when the electrodes of the detection unit become wet.
  • this water wetting sensor has an operating condition for the inflow of liquid to the detection unit. It is also necessary to ensure the reliability as a sensor by preventing malfunctions except in a wet state where it is not necessary to operate the circuit.
  • a method is proposed in which a fuse element is connected to a charge / discharge circuit of a battery cell, and the charge / discharge circuit is cut off by fusing the fuse with heat from a heating resistor.
  • a fuse element is connected to a charge / discharge circuit of a battery cell, and the charge / discharge circuit is cut off by fusing the fuse with heat from a heating resistor.
  • an FET 102 that switches energization to the heating resistor 101
  • a battery stack 103 in which battery cells are connected in series and / or in parallel, an overcharge and an overdischarge of the battery stack 103, etc.
  • a control IC 104 that monitors and outputs a control signal to the FET 102 when the battery stack 103 is abnormal, and a fuse 105 connected to the charge / discharge path of the battery stack 103 are provided.
  • the protection circuit 100 when there is no abnormality in the battery stack 103, energization of the heating resistor 101 is regulated by the FET 102.
  • the control IC 104 detects an abnormality such as overcharge or overdischarge of the battery stack 103, the protection circuit 100 causes the FET 102 to energize the heating resistor 101. Thereby, the protection circuit 100 melts the fuse 105 when the heating resistor 101 generates heat, and interrupts the charging / discharging path of the battery stack 103.
  • the protection circuit 100 requires the FET 102 and the control IC 104 for controlling the FET 102 in order to control the energization of the heating resistor 101, resulting in an increase in the number of parts and an increase in assembly man-hours. If the control IC 104 fails due to liquid leakage, the fuse 105 may not be blown.
  • the present invention has been proposed in view of such a conventional situation, a liquid wetting sensor for detecting water wetting and liquid leakage from the battery, etc., for abnormalities such as water wetting and liquid leakage from the battery, It is an object of the present invention to provide a switch element capable of safely opening an electric circuit, and a battery system incorporating the switch element.
  • a liquid wetting sensor includes a reaction unit that generates heat when touched by a liquid, a thermistor that is disposed in the vicinity of the reaction unit, and whose electrical resistance value decreases as the temperature rises. It is what has.
  • the switch element according to the present invention is connected to a soluble conductor connected to an external circuit, a heating resistor, a reaction part that generates heat when touched by liquid, and the temperature of the reaction part. And a thermistor whose electric resistance value decreases as it rises, and the soluble conductor is blown by the heat generation of the heating resistor whose energization amount has increased due to the decrease in the electric resistance value of the thermistor.
  • the battery system includes a battery cell, a soluble conductor connected on the charge / discharge path of the battery cell, a heating resistor, a reaction unit that generates heat by touching the liquid, and the heating resistor.
  • a thermistor that is connected to the body energization path and has an electrical resistance value that decreases as the temperature of the reaction section increases, and the heat generation of the heating resistor that increases the amount of electricity due to a decrease in the electrical resistance value of the thermistor. It melts the fusible conductor.
  • the battery system includes a battery cell, a soluble conductor connected on the charge / discharge path of the battery cell, a heating resistor, a reaction unit that generates heat by touching the liquid, and the reaction unit.
  • a thermistor whose electrical resistance value decreases as the temperature rises, and a current control element that controls energization to the heating resistor, the thermistor and the current control element are connected, and the electrical resistance value of the thermistor decreases
  • the current control element is energized, energization of the heating resistor is started, and the soluble conductor is blown by the heat generated by the heating resistor.
  • the switch element according to the present invention includes a soluble conductor connected to an external circuit and a reaction portion that generates heat when touched by a liquid, and blows off the soluble conductor by heat generation of the reaction portion. .
  • a battery system includes a battery cell, a soluble conductor connected on the charge / discharge path of the battery cell, and a reaction unit that generates heat by touching the liquid, and generates heat by the reaction unit.
  • the soluble conductor is blown out.
  • the protection element can be operated, or the heating resistor can be energized and heated to melt the fuse element, and the current path of the external circuit can be interrupted.
  • the soluble conductor when it is necessary to cut off the current path of the external circuit such as water wetting or liquid leakage from the battery, the soluble conductor is blown out by the heat generated in the reaction part in contact with the liquid.
  • the current path of the external circuit that is energized through the fusible conductor can be interrupted.
  • FIG. 1 is a diagram illustrating a schematic configuration of a liquid wetting sensor.
  • FIG. 2 is an exploded perspective view illustrating a configuration example of the liquid wetting sensor.
  • FIG. 3 is a diagram illustrating a circuit configuration of a battery pack using a liquid wetting sensor.
  • 4A and 4B are diagrams showing the protection element, in which FIG. 4A is a plan view and FIG. 4B is a cross-sectional view along X-X ′.
  • FIG. 5 is a circuit configuration diagram of the protection element, where (A) shows before the fuse element is blown and (B) shows after the fuse element is blown.
  • FIG. 6 is a diagram illustrating a circuit configuration of a battery pack using a liquid wetting sensor.
  • FIG. 1 is a diagram illustrating a schematic configuration of a liquid wetting sensor.
  • FIG. 2 is an exploded perspective view illustrating a configuration example of the liquid wetting sensor.
  • FIG. 3 is a diagram illustrating a circuit configuration of a
  • FIG. 7 is an exploded perspective view showing a configuration example of the switch element.
  • FIG. 8 is a cross-sectional perspective view of the fuse element.
  • 9A and 9B are diagrams showing a circuit configuration of the switch element, where FIG. 9A shows before the fuse element is blown, and FIG. 9B shows after the fuse element is blown.
  • FIG. 10 is a diagram illustrating a circuit configuration of a battery pack using a switch element.
  • FIG. 11 is a diagram illustrating a circuit configuration of a battery pack using a switch element.
  • FIG. 12 is a diagram showing a configuration example of a switch element in which a heating resistor is covered with a glass layer, where (A) is a cross-sectional view and (B) is a plan view.
  • FIG. 13 is a diagram illustrating a configuration example of a switch element in which a power feeding path to a heating resistor and a current-carrying path to a fuse element are separated, (A) is a cross-sectional view, and (B) is a plan view.
  • FIG. 14 is a circuit diagram of a switch element in which a power supply path to the heating resistor and a current supply path to the fuse element are separated.
  • FIG. 15 is a diagram illustrating a circuit configuration of a battery pack using a switch element in which a power supply path to the heating resistor and a current supply path to the fuse element are separated.
  • 16A and 16B are perspective views showing a casing of the switch element, in which FIG.
  • FIG. 16A shows a state in which an introduction port is formed on the top surface
  • FIG. 16B shows a state in which a plurality of introduction ports are formed on the top surface
  • FIG. ) Shows a state where inlets are formed on the top and side surfaces
  • (D) shows a state where a plurality of inlets are formed on the top and side surfaces.
  • FIG. 17 is a perspective view showing a switch element using a cylindrical cover member.
  • FIG. 18 is a perspective view showing a switch element using a casing in which a discharge port is formed.
  • FIG. 19 is a cross-sectional view showing a switch element in which a discharge port is provided at the same height as the position where the reaction part is provided.
  • FIG. 20 is a perspective view showing a switch element using a housing in which a slit-shaped inlet and a slit-shaped outlet are formed.
  • 21A and 21B are diagrams showing a switch element using a housing in which an introduction groove is formed.
  • FIG. 21A is a cross-sectional view and FIG. 21B is an external perspective view.
  • 22A and 22B are diagrams showing a switch element using a housing in which a plurality of introduction ports and introduction grooves are formed.
  • FIG. 22A is a cross-sectional view
  • FIG. 22B is an external perspective view.
  • FIG. 23 is a cross-sectional view showing a switch element using a housing in which an introduction groove that gradually narrows toward the inside where the reaction portion is provided.
  • FIG. 23 is a cross-sectional view showing a switch element using a housing in which an introduction groove that gradually narrows toward the inside where the reaction portion is provided.
  • FIG. 24 is a cross-sectional view showing a switch element using a casing in which a water repellent treatment part is formed in a place other than the reaction part.
  • FIG. 25 is a perspective view showing a switch element using a housing whose inlet is sealed with a water-soluble insulating material.
  • FIG. 26 is a cross-sectional view showing a switch element in which the introduction groove is sealed with a water-soluble insulating material.
  • FIG. 27 is an exploded perspective view showing a switch element that melts the soluble conductor by the heat generated in the reaction section.
  • 28A and 28B are diagrams showing a circuit diagram configuration example of the switch element shown in FIG. 27.
  • FIG. 28A shows a state before fusing
  • FIG. 28B shows a state after fusing.
  • FIG. 29 is a diagram showing a circuit configuration example of a battery system using the switch element shown in FIG.
  • FIG. 30 is a diagram showing a circuit configuration of a conventional battery pack.
  • the liquid wetting sensor 1 to which the present invention is applied includes a reaction part 2 that generates heat when touched by a liquid, and a temperature-sensitive part 3 whose electrical characteristics change as the temperature of the reaction part 2 increases.
  • the reaction part 2 can be comprised, for example using quicklime which reacts with water and generates heat, and is disposed and held on an insulating substrate 5, for example, as shown in FIG.
  • the temperature sensing part 3 for example, a thermistor whose resistance value decreases as the temperature of the reaction part 2 increases, a diode whose voltage changes, other Peltier elements, thermocouples, bimetals, temperature sensors, etc.
  • the electrical characteristics have temperature dependence. Electronic components can be used.
  • the reaction part 2 and the temperature sensitive part 3 are thermally connected by being arranged close to each other, and the temperature sensitive part 3 is heated by the heat of the reaction part 2. Thereby, the temperature sensitive part 3 changes electrical characteristics such as a resistance value and an output voltage.
  • the thermistor 3a is formed on the insulating substrate 5, and both ends thereof are connected to the first and second external connection electrodes 6 and 7.
  • the thermistor 3a is connected to the energization path of the electric circuit 4 via the first and second external connection electrodes 6 and 7, and always restricts the energization of the electric circuit 4 by a high electric resistance.
  • a NTC (negative temperature coefficient) thermistor or a CTR (critical temperature resistor) thermistor can be preferably used.
  • the reaction part 2 will generate heat
  • the liquid wetting sensor 1 has a casing formed by a cover member 8 that covers the insulating substrate 5.
  • the cover member 8 is formed with an introduction port 9 that guides the liquid to the reaction unit 2.
  • the liquid wetting sensor 1 is disposed so that the reaction unit 2 and the thermistor 3a overlap each other.
  • the liquid wetting sensor 1 has a thermistor 3a superimposed on quick lime arranged on an insulating substrate.
  • the reaction part 2 and the thermistor 3a are thermally connected closely, and the reaction part 2 generates heat, so that the electric resistance value of the thermistor 3a can be quickly reduced.
  • the liquid wetting sensor 1 may be provided with a water repellent treatment unit 14 at a place other than the reaction part 2 or a place other than the reaction part 2 and its vicinity.
  • a water repellent treatment portion 14 is provided in an exposed region of the surface 5a of the insulating substrate 5 excluding the reaction portion 2 and the thermistor 3a.
  • the water repellent portion 14 can be formed by a known method such as application of a fluorine coating agent or solder paste coating.
  • the liquid wetting sensor 1 can guide the liquid on the insulating substrate 5 to the reaction part 2 which is a non-water-repellent region, and accelerates the heating of the thermistor 3a to quickly reduce the electric resistance value of the thermistor 3a. be able to.
  • the liquid wetting sensor 1 can be used by being incorporated in a circuit in a battery pack 10 of a lithium ion secondary battery, for example.
  • the battery pack 10 includes a battery stack 15 including, for example, a plurality of lithium ion secondary battery cells.
  • the battery pack 10 includes a battery stack 15, a charge / discharge control circuit 16 that controls charging / discharging of the battery stack 15, a protection element 11 that cuts off charging when the battery stack 15 is abnormal, liquid leakage or submergence of each battery cell, etc.
  • a liquid wetting sensor 1 that detects the above and a current control element 12 that controls the operation of the protection element 11 according to the detection result of the liquid wetting sensor 1.
  • the battery stack 15 includes battery cells that need to be controlled to protect against leakage, submersion, etc., in series and / or in parallel, and is detachable via the positive terminal 10a and the negative terminal 10b of the battery pack 10.
  • the charging device 13 is connected to the charging device 13 and the charging voltage from the charging device 13 is applied.
  • the battery pack 10 charged by the charging device 13 can operate the electronic device by connecting the positive electrode terminal 10a and the negative electrode terminal 10b to the electronic device operated by the battery.
  • the charge / discharge control circuit 16 includes two current control elements 17 and 18 connected in series to a current path flowing from the battery stack 15 to the charging device 13, and a control unit 19 that controls operations of the current control elements 17 and 18. Is provided.
  • the current control elements 17 and 18 are configured by, for example, field effect transistors (hereinafter referred to as FETs), and the control unit 19 controls the gate voltage to thereby charge and / or discharge the current path of the battery stack 15. Controls continuity and shut-off.
  • the control unit 19 When the battery stack 15 is overdischarged or overcharged according to the detection result by a detection circuit (not shown) that operates by receiving power supply from the charging device 13 and detects the voltage of each battery cell, the control unit 19 The operations of the current control elements 17 and 18 are controlled so as to interrupt the path.
  • the protection element 11 is connected, for example, on a charge / discharge current path between the battery stack 15 and the charge / discharge control circuit 16, and its operation is controlled by the current control element 12.
  • the protection element 11 includes an insulating substrate 26, first and second electrodes 22 and 23 formed on the insulating substrate 26, and an insulating substrate 26.
  • a heating resistor 24 formed on the surface of the substrate, a glass layer 27 covering the heating resistor 24, a heating element extraction electrode 21 laminated on the glass layer 27 and connected to the heating resistor 24, and a first And the fuse element 20 mounted over the second electrode 23 through the connecting solder 28.
  • the first and second electrodes 22 and 23 are respectively connected to the first and second external connection electrodes 22a and 23a formed on the back surface of the insulating substrate 26 through castellation.
  • the heating resistor 24 is connected to the heating element power supply electrode 25 and is connected to the current control element 12 via the heating element power supply electrode 25. Further, the heating resistor 24 is connected to the charging and discharging paths of the fuse element 20 and the battery stack 15 by electrically connecting the heating element lead electrode 21 to the fuse element 20.
  • the liquid wetting sensor 1 has one end of the temperature sensing unit 3 (thermistor 3a) connected to the battery stack 15 and the other end connected to the current control element 12. Then, the liquid wetting sensor 1 always regulates energization from the battery stack 15 to the current control element 12 by the high resistance of the thermistor 3a. Further, the liquid wetting sensor 1 controls the current from the battery stack 15 by causing the reaction section 2 to generate heat when the liquid wetting state such as battery cell leakage or submergence occurs and the electrical resistance value of the thermistor 3a decreases. The element 12 can be energized.
  • the current control element 12 is composed of, for example, an FET.
  • the current control element 12 controls the charge / discharge current path of the battery stack 15 to be cut off regardless of the switching operation of the current control elements 17 and 18.
  • the protection element 11 has a circuit configuration as shown in FIG. That is, the protection element 11 generates heat by energizing the fuse element 20 connected in series between the first and second electrodes 22 and 23 via the heating element lead electrode 21 and the connection point of the fuse element 20.
  • This is a circuit configuration comprising the heating resistor 24 that melts the fuse element 20.
  • the fuse element 20 is connected in series on the charge / discharge current path of the battery pack 10 via the first and second external connection electrodes 22a and 23a, and the heating resistor 24 feeds the heating element.
  • the current control element 12 is connected via the electrode 25.
  • the first electrode 22 of the protection element 11 is connected to one open end side of the battery stack 15 via the first external connection electrode 22a, and the second electrode 23 is connected via the second external connection electrode 23a.
  • the battery pack 10 is connected to the positive terminal 10a side.
  • the liquid wetting sensor 1 having such a circuit configuration allows the liquid to flow through the inlet 9 of the cover member 8 when it is necessary to cut off the current path of the battery pack 10 such as liquid leakage from the battery or submersion.
  • the resistance of the thermistor 3 a is reduced by the heat generation of the reaction unit 2, and the power of the battery stack 15 is supplied to the protection element 11 by the current control element 12 energized from the battery stack 15.
  • the heating element 24 is energized and heated in the protection element 11, and the fuse element 20 incorporated on the current path of the battery pack 10 is melted.
  • the battery pack 10 can cut the current path of the battery pack 10 by fusing between the first electrode 22 and the heating element extraction electrode 21 and the second electrode 23 (FIG. 5B). Further, when the fuse element 20 is melted, power supply to the heating resistor 24 is also stopped.
  • the battery pack 10 using the liquid wetting sensor 1 may omit the FET for controlling the operation of the protection element 11 and operate the protection element 11 with the liquid wetting sensor 1.
  • the temperature sensing unit 3 (thermistor 3 a) of the liquid wetting sensor 1 has one end connected to the heating resistor 24 of the protection element 11 and the other end opened to the battery stack 15. Connected with the end.
  • the liquid wetting sensor 1 always regulates energization to the heating resistor 24 by the high resistance of the thermistor 3a.
  • the reaction unit When the liquid wetting sensor 1 needs to cut off the current path of the battery pack 10 such as liquid leakage from the battery or submergence, when the liquid enters through the inlet 9 of the cover member 8, the reaction unit The resistance of the thermistor 3a is reduced by the heat generation of 2, and the power of the battery stack 15 can be supplied to the heating resistor 24 of the protection element 11. As a result, the heating element 24 is energized and heated in the protection element 11, and the fuse element 20 incorporated on the current path of the battery pack 10 is melted. Therefore, the battery pack 10 can cut the current path of the battery pack 10 by fusing between the first electrode 22 and the heating element extraction electrode 21 and the second electrode 23 (FIG. 5B). Further, when the fuse element 20 is melted, power supply to the heating resistor 24 is also stopped.
  • the liquid wetting sensor 1 of the present invention is not limited to use in a battery pack of a lithium ion secondary battery, and can of course be applied to various uses that require interruption of a current path by an electric signal.
  • the liquid wetting sensor 1 uses various electronic components having temperature characteristics that constitute the temperature sensing unit 3, and appropriately adjusts the liquid according to changes in the electric characteristics. The energization of the electric circuit connected to the wetness sensor 1 can be controlled.
  • FIG. 7 is an exploded perspective view of the switch element 30.
  • the switch element 30 is arranged on the energization path of the external circuit to cut off the conduction of the external circuit.
  • the switch element 30 is in a wet state such as submergence or battery leakage. By detecting this, the energization path is appropriately interrupted.
  • the switch element 30 is formed so as to be mountable by reflow or the like on a circuit board on which an external circuit is formed.
  • the switch element 30 includes a fuse element 31 connected to an external circuit, a heating resistor 32, and a reaction unit 2 and a temperature sensing unit 3 constituting the liquid wetting sensor 1.
  • the switch element 30 has a housing formed by a fuse element 31, a heating resistor 32, an insulating substrate 33 provided with the temperature sensing unit 3, and a cover member 34 covering the insulating substrate 33.
  • the cover member 34 is formed with an introduction port 36 that guides the liquid to the reaction unit 2.
  • the thermistor 3a is used as the temperature sensing part 3 of the liquid leak sensor 1 will be described as an example.
  • the insulating substrate 33 is formed in, for example, a substantially square shape using an insulating member such as alumina, glass ceramics, mullite, zirconia.
  • the insulating substrate 33 may be made of a material used for a printed wiring board such as a glass epoxy board or a phenol board.
  • First and second electrodes 38 and 39 are formed on opposite ends of the insulating substrate 33.
  • the first and second electrodes 38 and 39 are each formed of a conductive pattern such as Ag or Cu.
  • the first and second electrodes 38 and 39 are continued from the front surface 33a of the insulating substrate 33 to the first and second external connection electrodes 38a and 39a formed on the back surface 33b through a castellation (not shown).
  • the switch element 30 includes a fuse element formed by connecting the first and second external connection electrodes 38a and 39a formed on the back surface 33b to connection electrodes provided on an external circuit board on which the switch element 30 is mounted. 31 is incorporated into a part of the current path formed on the circuit board.
  • reaction part 2 is formed on the insulating substrate 33 by arranging and holding, for example, quick lime.
  • the insulating substrate 33 includes the liquid wetting sensor 1 by the thermistor 3 being superimposed on the reaction unit 2.
  • the heat generating resistor 32 is a conductive member that has a relatively high resistance value and generates heat when energized.
  • the heating resistor 32 is obtained by mixing a powdered material of these alloys, compositions, or compounds with a resin binder or the like, forming a paste on the insulating substrate 33 using a screen printing technique, and firing the paste. Or the like.
  • the heat generating resistor 32 is overlapped with the fuse element 31 and melts the fuse element 31 when heat is generated by energization.
  • One end of the heating resistor 32 is connected to the thermistor 3a, so that energization and heat generation are always regulated.
  • the heating resistor 32 generates heat when the amount of energization increases due to a decrease in the electrical resistance value of the thermistor 3a, and can fuse the fuse element 31.
  • the heating resistor 32 is electrically and thermally connected by the fuse element 31 being superimposed.
  • the fuse element 31 is connected by the connecting solder 28 across the first electrode 38 and the second electrode 39.
  • the fuse element 31 is electrically connected between the first and second electrodes 38 and 39 during normal use, and constitutes a part of a current path of an external circuit in which the switch element 30 is incorporated.
  • the fuse element 31 is blown by self-heating (Joule heat) when a current exceeding the rating is applied, or blown by the heat generated by the heating resistor 32, and the first and second electrodes 38 and 39 are cut off. To do.
  • the fuse element 31 has a predetermined rated current value, and when the heat generated by the heating resistor 32 or a current exceeding the rated current value is energized, the fuse element 31 is quickly melted by self-heating.
  • the fuse element 31 is preferably composed mainly of any one selected from nickel, tin, and lead.
  • the main component refers to a component that is 50 wt% or more based on the total mass of the material.
  • the fuse element 31 may have a laminated structure in which a low melting point metal layer 41 and a high melting point metal layer 42 are laminated.
  • a low melting point metal it is preferable to use solder such as Pb-free solder, and as the high melting point metal, it is preferable to use Ag, Cu or an alloy containing these as a main component.
  • the fuse element 31 may have an inner layer made of a low melting point metal and an outer layer made of a high melting point metal.
  • a soluble conductor in which the entire surface of the inner low melting point metal layer 41 is covered with the outer high melting point metal layer 42, even when a low melting point metal having a melting point lower than the reflow temperature is used, The outflow of the low melting point metal to the outside can be suppressed. Further, when the inner layer low melting point metal melts, the outer layer high melting point metal is also eroded (soldered) and can be quickly melted.
  • the thermistor 3 a has one end connected to the heating resistor 32 and the other end connected to the first heating element electrode 43.
  • the first heating element electrode 43 is formed on the front surface 33a of the insulating substrate 33, and is continuous with a first heating element power supply electrode (not shown) formed on the back surface 33b of the insulating substrate 33 via castellation. ing.
  • the thermistor 3a regulates energization to the heating resistor 32 with high electrical resistance.
  • the switch element 30 decreases the electrical resistance value of the thermistor 3 a, thereby increasing the amount of current supplied to the heating resistor 32 and generating heat from the heating resistor 32. To fuse the fuse element 31. Thereby, the switch element 30 can interrupt
  • the liquid wetting sensor 1 is arranged such that the reaction unit 2 and the thermistor 3a are overlapped. Thereby, the reaction part 2 and the thermistor 3a are thermally connected closely, and the reaction part 2 generates heat, so that the electric resistance value of the thermistor 3a can be quickly reduced.
  • the switch element 30 is provided with a cover member 34 on the surface 33a of the insulating substrate 33 on which the fuse element 31 is provided, which protects the inside and prevents the molten fuse element 31 from scattering.
  • the cover member 34 can be formed of an insulating member such as various engineering plastics and ceramics.
  • the cover member 34 is connected to the surface 33 a of the insulating substrate 33 by an insulating adhesive, thereby covering the fuse element 31.
  • cover member 34 is formed with an inlet 36 for introducing a liquid into the reaction section 2 provided on the insulating substrate 33.
  • Such a switch element 30 has a circuit configuration as shown in FIG. That is, the switch element 30 melts the fuse element 31 by causing the fuse element 31 connected in series between the first and second electrodes 38 and 39 to generate heat by energizing through the connection point of the fuse element 31.
  • the circuit configuration includes the heating resistor 32.
  • the switch element 30 is formed with an energization path to the first heating element electrode 43, the temperature sensing unit 3 (thermistor 3 a), the heating resistor 32, and the heating element 32 that reaches the fuse element 31.
  • the switch element 30 has the first and second electrodes 38 and 39 connected to the open end of an external circuit such as a power supply circuit, whereby the fuse element 31 is incorporated on the energization path of the external circuit.
  • the switch element 30 can be used by being incorporated in the circuit in the battery pack 10 of the above-described lithium ion secondary battery, for example.
  • the switch element 30 is connected to one open end of the battery stack 15 through which the first heating element electrode 43 energizes the heating resistor 32 and energization to the heating resistor 32 is regulated by the thermistor 3a.
  • the switch element 30 has the first electrode 38 connected to the other open end side of the battery stack 15 and the second electrode 39 connected to the positive electrode terminal 10 a side of the battery pack 10, whereby the fuse element 31. Is incorporated on the energization path of the external circuit.
  • the switch element 30 decreases the electric resistance value of the thermistor 3a, thereby reducing the battery stack.
  • the heating resistor 32 can be heated by being energized from 15.
  • the fuse element 31 incorporated in the current path of the battery pack 10 is melted in the switch element 30, and the molten conductor of the fuse element 31 is heated to the heating element extraction electrode 21 and the first and second electrodes with high wettability.
  • the fuse element 31 is blown by being attracted to the electrodes 38 and 39. Therefore, as shown in FIG. 9B, the switch element 30 can block the charge / discharge path of the battery stack 15.
  • the switch element 30 constitutes a part of an energization path to the heating resistor 32 by connecting the fuse element 31 to the heating resistor 32. Therefore, when the fuse element 31 is melted and the connection with the external circuit is interrupted, the switch element 30 can also stop the heat generation because the energization path to the heating resistor 32 is also interrupted.
  • the switch element 30 may be provided with a water repellent treatment part 35 at a place other than the reaction part 2 or a place other than the reaction part 2 and its vicinity.
  • the switch element 30 repels the exposed region of the surface 33a of the insulating substrate 33 excluding the reaction part 2, the heating resistor 32, the first and second electrodes 38 and 39, the first heating element electrode 43, and the thermistor 3a.
  • a water treatment unit 35 is provided.
  • the water repellent portion 35 can be formed by a known method such as application of a fluorine-based coating agent or solder paste coating.
  • the switch element 30 can guide the liquid on the insulating substrate 33 to the reaction part 2 which is a non-water-repellent region, and can accelerate the heating of the thermistor 3a and promote the fusing of the fuse element 31.
  • the switch element 30 connects the temperature sensing unit 3 (thermistor 3a) between the battery stack 15 and the current control element 12 such as an FET, and controls one end of the heating resistor 32. It may be connected to the element 12.
  • the thermistor 3 a has one end connected to the open end of the battery stack 15 via the third external connection electrode 44 and the other end connected to the current control element 12 via the fourth external connection electrode 45.
  • the switch element 30 always regulates the energization from the battery stack 15 to the current control element 12 by the high resistance of the thermistor 3a.
  • one end of the heating resistor 32 is connected to the current control element 12 via the first heating element electrode 43, and energization from the battery stack 15 is restricted.
  • the switch element 30 generates heat when the liquid leaks from the battery cell or the liquid wet state such as submergence occurs, the liquid enters from the introduction port 36 provided in the cover member 34 and the reaction unit 2 comes into contact with the liquid. .
  • the current control element 12 is energized from the battery stack 15 by decreasing the electrical resistance value of the thermistor 3a.
  • the current control element 12 is switched so that the electric power of the battery stack 15 is supplied to the heating resistor 32, whereby the switch element 30 is energized and heated by the heating resistor 24, and is on the current path of the battery pack 10.
  • the fuse element 31 incorporated in the battery pack is melted and the current path of the battery pack 10 can be cut off. Further, when the fuse element 31 is melted, power supply to the heating resistor 32 is also stopped.
  • the switch element 30 is provided with an insulating layer 50 so as to cover the heating resistor 32, and the heating element extraction electrode 51 so as to face the heating resistor 32 through the insulating layer 50. May be formed.
  • the heating element extraction electrode 51 is connected by overlapping the fuse element 31, whereby the heating resistor 32 is overlapped with the fuse element 31 via the insulating layer 50 and the heating element extraction electrode 51.
  • the insulating layer 50 is provided in order to protect and insulate the heating resistor 32 and to efficiently transfer the heat of the heating resistor 32 to the fuse element 31, and is made of, for example, a glass layer.
  • an insulating layer 50 may be laminated between the heat generating resistor 32 and the insulating substrate 33 in order to efficiently transmit the heat of the heat generating resistor 32 to the fuse element 31.
  • one end of the heating resistor 32 is connected to the heating element extraction electrode 51, and the other end is connected to the first heating element electrode 43 via the thermistor 3a.
  • the heating element extraction electrode 51 is formed on the surface 33a of the insulating substrate 33 and connected to the heating resistor 32.
  • the heating element lead electrode 51 is laminated on the insulating layer 50 so as to face the heating resistor 32, and the fuse. And an upper layer portion 51 b connected to the element 31.
  • the heating resistor 32 is electrically connected to the fuse element 31 through the heating element lead electrode 51.
  • the heating resistor 32 is thermally connected to the fuse element 31 via the insulating layer 50 and the heating element lead electrode 51.
  • the heating element extraction electrode 51 is heated by being disposed opposite to the heating resistor 32 via the insulating layer 50, so that the fuse element 31 can be melted and the molten conductor can be easily aggregated.
  • the switch element 30 constitutes a part of the energization path to the heating resistor 32 by connecting the fuse element 31 to the heating element extraction electrode 51. Therefore, when the fuse element 31 is melted and the connection with the external circuit is interrupted, the switch element 30 can also stop the heat generation because the energization path to the heating resistor 32 is also interrupted.
  • the switch element to which the present invention is applied may separate the energization path of the fuse element 31 and the power supply path to the heating resistor 32.
  • the switch element 30 shown in FIG. 13 is electrically connected to the fuse element 31 electrically and thermally by the heating resistor 32 being superimposed on the fuse element 31 via the insulating layer 50.
  • the heating resistor 32 has one end connected to the thermistor 3 a and the other end connected to the second heating element electrode 52.
  • the second heating element electrode 52 is formed on the front surface 33a of the insulating substrate 33, and is continuous with the second heating element power supply electrode (not shown) formed on the back surface 33b of the insulating substrate 33 via castellation. ing.
  • the heating resistor 32 may be formed on the back surface 33b opposite to the front surface 33a of the insulating substrate 33 on which the first and second electrodes 38 and 39 are formed. Alternatively, it may be formed on the surface 33a of the insulating substrate 33 adjacent to the fuse element 31 or the thermistor 3a. In addition, the switch element 30 may have the heating resistor 32 formed inside the insulating substrate 33.
  • such a switch element 30 includes a first heating element electrode 43, a temperature sensing unit 3 (thermistor 3 a), a heating resistor 32, and a second heating element electrode 52.
  • a power supply path 53 is formed.
  • the first and second heat generating body electrodes 43 and 52 are connected to the power supply circuit, and energization is restricted by the thermistor 3a.
  • an energization path 54 of the fuse element 31 is formed between the first and second electrodes 38 and 39.
  • the energization path 54 is incorporated on the energization path of the external circuit by connecting the first and second electrodes 38 and 39 to the open end of the external circuit.
  • the switch element 30 when the switch element 30 generates heat when the reaction unit 2 comes into contact with the liquid, the electrical resistance value of the thermistor 3a decreases, and thereby the power supply path 53 is energized and the heat generating resistor 32 can generate heat. Thereby, the switch element 30 can cut off the external circuit by fusing the fuse element 31 with the heat of the heating resistor 32.
  • the switch element 30 may have a power supply path 31 to the heating resistor 32 and an energization path 32 of the fuse element 31 in parallel. Also in the configuration shown in FIG. 15, when the switch element 30 generates heat due to the reaction unit 2 coming into contact with the liquid, the electrical resistance value of the thermistor 3 a decreases, thereby energizing the power supply path 31, and the heating resistor 32. Can generate heat. Thereby, the switch element 30 can cut off the external circuit by fusing the fuse element 31 with the heat of the heating resistor 32.
  • first and second electrodes 38 and 39, the heating element extraction electrode 51, and the first and second heating element electrodes 43 and 52 described above are formed by a conductive pattern such as Ag or Cu, and are appropriately formed on the surface. It is preferable that a protective layer of Sn plating, Ni / Au plating, Ni / Pd plating, Ni / Pd / Au plating, or the like is formed. Thus, the surface is prevented from being oxidized, and the first and second electrodes 38 and 39, the heating element lead-out electrode 51, and the first and second heating element electrodes are made of the connecting material such as the solder 28 for connecting the fuse element 31. 43 and 52 can be suppressed.
  • the switch element 30 has a housing formed of the insulating substrate 33 and the cover member 34 connected on the insulating substrate 33.
  • the switch element 30 is provided with a cover member 34 to protect the fuse element 31, the reaction unit 2, and the temperature sensing unit 3 from external mechanical disturbances and the like, and the fuse element 31 generates arc discharge by self-heating. When the fusing is accompanied, the scattering of the molten metal to the surroundings can be prevented.
  • the cover member 34 is provided with an inlet 36 that guides the liquid to the reaction unit 2.
  • the switch element 30 irreversibly blocks the fuse element 31 by allowing the liquid to flow into the reaction portion 2 through the inlet 36 provided in the cover member 34.
  • the cover member 34 is made of a polyhedron, for example, as shown in FIG. 16A, and one introduction port 36 is provided on one surface.
  • the introduction port 36 may be provided on the top surface 34a of the cover member 34 on the side opposite to the mounting surface of the housing. preferable.
  • the cover member 34 may form the introduction port 36 on a surface other than the top surface 34a, for example, the side surface 34b. As shown in FIG.
  • the cover member 34 may have a plurality of inlets 36 formed on the top surface 34a, or a plurality of inlets 36 formed on the side surface 34b.
  • the cover member 34 can more easily introduce the liquid into the reaction unit 2 by providing a plurality of introduction ports 36.
  • the cover member 34 may be a polyhedron as shown in FIG. 16C, for example, and the inlet 36 may be provided on a plurality of surfaces, for example, the top surface 34a and the side surface 34b. Further, as shown in FIG. 16D, the cover member 34 may have one or a plurality of introduction ports 36 on a plurality of surfaces.
  • the switch element 30 may be formed by forming the cover member 34 in a cylindrical shape and forming an arbitrary number of introduction ports 36 at an arbitrary position.
  • FIG. 17 is an external perspective view of the switch element 30 in which the cover member 34 is formed in a cylindrical shape and a plurality of introduction ports 36 are formed over the entire circumference.
  • the cover member 34 may be formed in a hollow polygonal column shape. By forming the cover member 34 in the shape of a hollow cylinder or prism, the introduction port 36 can be formed without being affected by the surface and angle according to the arrangement of the switch element 30, the liquid intrusion route, and the like.
  • a heating element power supply electrode 43 a is formed so as to protrude from the outer peripheral surface of the cover member 34.
  • FIG. 18 is an external perspective view showing the switch element 30 in which the introduction port 36 is formed on the top surface 34a of the cover member 34 made of a polyhedron and the discharge port 37 for discharging the liquid is formed on the side surface 34b.
  • the discharge port 37 By forming the discharge port 37, the reaction part 2 and the temperature sensing part 3 are cooled when a large amount of liquid enters the switch element 30, and the decrease in the resistance value of the thermistor 3a is inhibited. It is possible to prevent such a situation that the change of the electrical characteristics 3 is hindered and the fusing action of the fuse element 31 is delayed.
  • the discharge port 37 is preferably formed smaller than the introduction port 36. By making the discharge port 37 relatively small, it is possible to prevent the liquid that has entered the switch element 30 from being excessively discharged and to prevent the reaction unit 2 from generating heat and the fuse element 31 from being delayed. .
  • the discharge port 37 is provided at the same height as the position where the reaction part 2 is provided or above the position where the reaction part 2 is provided.
  • the discharge port 37 is connected to the reaction part 2 on the side surface 34 b of the cover member 34. It is preferable to be provided at the same height as or above the provided position.
  • the liquid that has entered the switch element 30 is drained from the reaction part 2 and remains in the reaction part 2, so that the action of the reaction part 2 is ensured and the liquid in the switch element 30 is retained.
  • the reaction part 2 and the temperature sensing part 3 are cooled by the liquid that has entered a large amount, and it is possible to prevent the heat generation action of the reaction part 2 and the fusing of the fuse element 31 from being delayed.
  • the shape of the inlet 36 for introducing the liquid and the outlet 37 for discharging the liquid are not particularly limited, such as circular and rectangular.
  • the introduction port 36 and the discharge port 37 may be formed in a slit shape as shown in FIG.
  • the introduction port 36 in a slit shape the liquid can be introduced more extensively, the reaction portion 2 can be reacted quickly, and the fuse element 31 can be blown.
  • the discharge port 37 in a slit shape excess liquid that has entered the switch element 30 can be quickly drained, and the heat generation action of the reaction unit 2 and the progress of fusing of the fuse element 31 are delayed. This can be prevented.
  • the cover member 34 may be provided with a slit-like introduction port 36 on the top surface 34 a and an introduction groove 40 that guides the liquid to the reaction unit 2.
  • the introduction groove 40 extends from the introduction port 36 in which the groove wall 40a is formed in the top surface 34a to the vicinity of the reaction section 2.
  • the switch element 30 can reliably guide the liquid that has entered the inlet 36 to the reaction unit 2 without flowing into a place other than the reaction unit 2.
  • the switch element 30 can prevent the liquid that has entered the introduction port 36 from being dissipated into the housing and delaying the heating action of the reaction unit 2 and the progress of fusing of the fuse element 31.
  • the cover member 34 may extend the introduction groove 40 to the side surface 34b and be continuous with the discharge port 37 formed on the side surface 34b. Accordingly, the switch element 30 can efficiently guide the liquid that has entered from the inlet 36 to the reaction unit 2 and drain the excess liquid from the outlet 37 efficiently.
  • a plurality of introduction grooves 40 may be formed. By forming a plurality of introduction grooves 40, the liquid can be guided over the entire width of the reaction section 2.
  • the introduction groove 40 may be gradually narrowed from the opening of the introduction port 36 facing the top surface 34a to the inside where the reaction unit 2 is provided. By narrowing the introduction groove 40 as it approaches the reaction part 2, the liquid that has entered through the opening of the introduction port 36 can be efficiently guided to the reaction part 2 by capillary action.
  • the switch element 30 may perform water repellent treatment at a place other than the reaction unit 2 to induce the liquid to the reaction unit 2.
  • the switch element 30 may form a water repellent treatment portion 46 in which the water repellent treatment is applied to the introduction port 36 or the groove wall 40 a of the introduction port 36 and the introduction groove 40.
  • the water repellent portion 46 can be formed by a known method such as application of a fluorine coating agent or solder paste coating.
  • the switch element 30 can efficiently guide the liquid that has entered from the introduction port 36 to the reaction unit 2.
  • a water repellent treatment to the introduction port 36 and the introduction groove 40, a small amount of liquid is repelled and not entered into the switch element 30 except in a wet state in which the switch element 30 should be operated. And reliability as a sensor or a switch can be secured.
  • the switch element 30 may perform water repellent treatment on the inner wall of the cover member 34. Also by applying a water-repellent treatment to the inner wall of the cover member 34, the liquid that has entered the switch element 30 can be efficiently guided to the reaction unit 2, and the reaction unit 2 can be operated quickly.
  • the switch element 30 may be closed by sticking a sheet body formed of a water-soluble sealing material 47 that dissolves the introduction port 36 with a liquid to the top surface 34a.
  • the switch element 30 may block the introduction groove 40 with a water-soluble sealing material 47 that dissolves with a liquid.
  • the water-soluble sealing material 47 include natural polymers such as agar and gelatin, semi-synthetic polymers such as cellulose and starch, and synthetic polymers such as polyvinyl alcohol. These shrink or dissolve when contacted with a liquid.
  • the material of the water-soluble sealing material 47 includes ABS, polyacrylonitrile, Polyvinylidene fluoride or saturated polyester such as PET, PTT, PEN, or the like can be used. Since these water-soluble materials also have a high molecular weight, the dissolution rate decreases and the reaction rate of the switch element 30 may decrease. Therefore, when giving priority to the reaction rate, it is preferable to adjust the polymerization degree and use it.
  • FIG. 27 is an exploded perspective view of the switch element 60.
  • the switch element 60 is disposed on the energization path of the external circuit to cut off the conduction of the external circuit.
  • the switch element 60 includes a fuse element 61 connected to an external circuit and the reaction unit 2 that generates heat when touched by a liquid, and the fuse element 61 is melted by heat generated by the reaction unit 2.
  • the switch element 60 has a housing formed of an insulating substrate 33 provided with the fuse element 61 and the reaction unit 2 and a cover member 34 covering the insulating substrate 33.
  • the cover member 34 is formed with an introduction port 36 that guides the liquid to the reaction unit 2.
  • First and second electrodes 38 and 39 are formed at opposite ends of the insulating substrate 33.
  • the first and second external connection electrodes 38 a and 39 a continuous with the first and second electrodes 38 and 39 are connected to connection electrodes provided on an external circuit board on which the switch element 60 is mounted.
  • the fuse element 61 is incorporated into a part of the current path formed on the circuit board.
  • reaction part 2 is formed on the insulating substrate 33 by arranging and holding, for example, quick lime.
  • the fuse element 61 is disposed in the vicinity of the reaction unit 2, so that the reaction unit 2 and the fuse element 61 are thermally connected.
  • the reaction unit 2 is arranged with the fuse element 61 superimposed thereon.
  • the fuse element 61 is connected by connecting solder from the first electrode 38 to the second electrode 39.
  • the fuse element 61 conducts between the first and second electrodes 38 and 39 during normal use, and constitutes a part of a current path of an external circuit in which the switch element 60 is incorporated.
  • the fuse element 61 is melted by self-heating (Joule heat) when a current exceeding the rating is applied, or is melted by the heat generated by the reaction unit 2 to cut off between the first and second electrodes 38 and 39. .
  • the fuse element 61 has a predetermined rated current value, and when the heat generated by the reaction part 2 or a current exceeding the rated current value is energized, the fuse element 61 is quickly melted by self-heating.
  • the fuse element 61 is preferably composed mainly of any one selected from nickel, tin, and lead. Note that the fuse element 61 may have a laminated structure in which a low melting point metal layer 41 and a high melting point metal layer 42 are laminated similarly to the fuse element 31 described above.
  • Such a switch element 60 has a circuit configuration as shown in FIG. That is, the switch element 60 has a circuit configuration including a fuse element 61 connected in series between the first and second electrodes 38 and 39 and a reaction unit 2 that melts the fuse element 61 by generating heat due to liquid wetting. is there. Further, the switch element 60 has the first and second electrodes 38 and 39 connected to the open end of the external electric circuit 4 such as a power supply circuit, so that the fuse element 61 is placed on the energization path of the electric circuit 4. The electric circuit 4 is energized by passing a rated current.
  • the switch element 60 When the current exceeding the rating flows through the fuse element 61, the switch element 60 is self-heated (Joule heat), and when a liquid enters the switch element 60, the heat is generated by the reaction unit 2. The fuse element 61 is melted and the electric circuit 4 is cut off (FIG. 28B).
  • the switch element 60 can be used by being incorporated in the circuit in the battery pack 10 of the above-described lithium ion secondary battery, for example.
  • the switch element 60 has the first electrode 38 connected to the other open end side of the battery stack 15, and the second electrode 39 connected to the positive electrode terminal 10 a side of the battery pack 10. It is incorporated on the energization path of the external circuit.
  • the switch element 60 When the switch element 60 generates heat when liquid enters from the introduction port 36 provided in the cover member 34 and the reaction unit 2 comes into contact with the liquid, the fuse element 61 incorporated on the current path of the battery pack 10. Is melted, and the fuse conductor of the fuse element 61 is attracted to the first and second electrodes 38 and 39 having high wettability, so that the fuse element 61 is blown. Therefore, as shown in FIG. 28B, the switch element 60 can block the charge / discharge path of the battery stack 15.
  • the switch element 60 is provided with a water repellent treatment part 35 at a place other than the reaction part 2 or at a place other than the reaction part 2 and its vicinity, like the switch element 30 described above. Also good.
  • the switch element 60 is provided with a water repellent treatment portion 35 in an exposed region of the surface 33 a of the insulating substrate 33 excluding the reaction portion 2 and the first and second electrodes 38 and 39.
  • the switch element 60 can guide the liquid on the insulating substrate 33 to the reaction part 2 that is a non-water-repellent region, and can promote the heating of the fuse element 61 and promote the fusing.
  • the cover member 34 constituting the casing is formed of a polyhedron, and one introduction port 36 is provided on one surface (FIG. 16 ( A)).
  • the cover member 34 may have a plurality of inlets 36 formed on the top surface 34a (see FIG. 16B), or a plurality of inlets 36 formed on the side surface 34b.
  • the cover member 34 may be provided with introduction ports 36 on a plurality of surfaces, for example, the top surface 34a and the side surface 34b (see FIG. 16C).
  • the cover member 34 may form one or a plurality of introduction ports 36 on a plurality of surfaces, respectively (see FIG. 16D).
  • the cover member 34 may be formed in a cylindrical shape, and any number of introduction ports 36 may be formed at any position (see FIG. 17).
  • the switch element 60 may form a discharge port 37 for discharging the liquid that has entered the cover member 34 from the introduction port 36, as with the switch element 30 (see FIG. 18).
  • the discharge port 37 is provided at the same height as the position where the reaction part 2 is provided or above the position where the reaction part 2 is provided (see FIG. 19).
  • the inlet 36 for introducing the liquid and the outlet 37 for discharging the liquid may have any shape such as a circle or a rectangle.
  • the introduction port 36 and the discharge port 37 may be formed in a slit shape (see FIG. 20).
  • the switch element 60 may be provided with a slit-like introduction port 36 on the top surface 34 a of the cover member 34 and an introduction groove 40 that guides the liquid to the reaction unit 2 (FIG. 21). (See (A) and (B)).
  • introduction grooves 40 may be formed (see FIGS. 22A and 22B).
  • the introduction groove 40 may be gradually narrowed from the opening of the introduction port 36 facing the top surface 34a to the inside where the reaction unit 2 is provided (see FIG. 23). By narrowing the introduction groove 40 as it approaches the reaction part 2, the liquid that has entered through the opening of the introduction port 36 can be efficiently guided to the reaction part 2 by capillary action.
  • the switch element 60 may perform water-repellent treatment at a place other than the reaction unit 2 and guide the liquid to the reaction unit 2 as in the case of the switch element 30 (see FIG. 24).
  • the switch element 60 may form the water repellent treatment portion 46 in which the water repellent treatment is performed on the introduction port 36 or the groove wall 40 a of the introduction port 36 and the introduction groove 40.
  • the water repellent portion 46 can be formed by a known method such as application of a fluorine coating agent or solder paste coating.
  • the switch element 60 can efficiently guide the liquid that has entered through the introduction port 36 to the reaction unit 2.
  • a water repellent treatment to the introduction port 36 and the introduction groove 40, a small amount of liquid is repelled and not entered into the switch element 60 except in a wet state where the switch element 60 should be operated. And reliability as a sensor or a switch can be secured.
  • the switch element 60 may perform a water repellent treatment on the inner wall of the cover member 34, similarly to the switch element 30. Also by applying a water repellent treatment to the inner wall of the cover member 34, the liquid that has entered the switch element 60 can be efficiently guided to the reaction unit 2 and the reaction unit 2 can be operated quickly.
  • the switch element 60 may be closed by sticking a sheet body formed of a water-soluble sealing material 47 that dissolves the introduction port 36 with a liquid to the top surface 34a (FIG. 25). Moreover, the switch element 60 may close the introduction groove 40 with a water-soluble sealing material 47 that dissolves with a liquid, as with the switch element 30 (see FIG. 26).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Fuses (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Protection Of Static Devices (AREA)
  • Connection Of Batteries Or Terminals (AREA)
PCT/JP2016/079596 2015-10-07 2016-10-05 液濡れセンサー、スイッチ素子、バッテリシステム WO2017061455A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201680055764.8A CN108028154B (zh) 2015-10-07 2016-10-05 液浸传感器、开关元件、电池系统
KR1020187007373A KR102024488B1 (ko) 2015-10-07 2016-10-05 웨팅 센서, 스위치 소자, 배터리 시스템

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-199816 2015-10-07
JP2015199816A JP6708388B2 (ja) 2015-10-07 2015-10-07 液濡れセンサー、スイッチ素子、バッテリシステム

Publications (1)

Publication Number Publication Date
WO2017061455A1 true WO2017061455A1 (ja) 2017-04-13

Family

ID=58487720

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/079596 WO2017061455A1 (ja) 2015-10-07 2016-10-05 液濡れセンサー、スイッチ素子、バッテリシステム

Country Status (5)

Country Link
JP (1) JP6708388B2 (zh)
KR (1) KR102024488B1 (zh)
CN (1) CN108028154B (zh)
TW (1) TWI712791B (zh)
WO (1) WO2017061455A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111969168A (zh) * 2019-05-20 2020-11-20 Oppo广东移动通信有限公司 电池组件和电子设备
CN112524389A (zh) * 2020-11-17 2021-03-19 华霆（合肥）动力技术有限公司 液冷管路、漏液检测装置、液冷管路系统和电池包
WO2021241629A1 (ja) * 2020-05-29 2021-12-02 デクセリアルズ株式会社 保護素子
WO2022150201A3 (en) * 2021-01-08 2022-12-01 Google Llc Battery protection systems for detecting conductive liquid ingress and associated devices and methods

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108807735A (zh) * 2017-05-04 2018-11-13 郑州宇通客车股份有限公司 一种电池箱体、电池箱体防水性能检测方法及系统
JP7018786B2 (ja) * 2018-02-27 2022-02-14 デクセリアルズ株式会社 保護回路、光発電システム
CN110474087A (zh) * 2019-08-14 2019-11-19 润远建设发展有限公司 一种具有漏液报警功能的新型锂电池
JP7443144B2 (ja) * 2020-04-17 2024-03-05 デクセリアルズ株式会社 保護素子及びバッテリパック
JP7487098B2 (ja) 2020-12-28 2024-05-20 デクセリアルズ株式会社 保護素子及び電子機器
JP7215611B1 (ja) 2022-02-01 2023-01-31 スズキ株式会社 街灯
CN116386282A (zh) * 2023-03-24 2023-07-04 国网河南省电力公司电力科学研究院 一种用于变电站边坡水位浸渍的预防报警装置及敷设方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015107631A1 (ja) * 2014-01-15 2015-07-23 デクセリアルズ株式会社 保護素子
JP2015228354A (ja) * 2014-06-03 2015-12-17 デクセリアルズ株式会社 ヒューズ素子

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06281848A (ja) * 1993-01-28 1994-10-07 Showa Electric Wire & Cable Co Ltd ルースチューブ型光ファイバケーブル
JP3475060B2 (ja) 1997-11-12 2003-12-08 三洋電機株式会社 水没判定シールを内装したパック電池
JP3793359B2 (ja) 1998-11-30 2006-07-05 株式会社オートネットワーク技術研究所 水濡れセンサ及び水濡れセンサを備えた電子制御回路基板
JP3468421B2 (ja) * 2000-07-21 2003-11-17 Ｎｅｃトーキン栃木株式会社 電池パック
JP2006252919A (ja) * 2005-03-10 2006-09-21 Nissan Motor Co Ltd 燃料電池システム
WO2007096878A2 (en) * 2006-02-21 2007-08-30 Rf Dynamics Ltd. Electromagnetic heating
DE102009029279A1 (de) * 2009-09-08 2011-03-10 Robert Bosch Gmbh Schutzeinrichtung für ein elektrisches Gerät
JPWO2012042903A1 (ja) * 2010-09-30 2014-02-06 パナソニック株式会社 試薬組成物、センサ、センサシステム及びセンサの製造方法
JP5952674B2 (ja) * 2012-08-01 2016-07-13 デクセリアルズ株式会社 保護素子及びバッテリパック
CN104407083B (zh) * 2014-11-28 2016-08-31 天津博纳艾杰尔科技有限公司 全自动分离系统及其在食用油极性组分分离中的应用

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015107631A1 (ja) * 2014-01-15 2015-07-23 デクセリアルズ株式会社 保護素子
JP2015228354A (ja) * 2014-06-03 2015-12-17 デクセリアルズ株式会社 ヒューズ素子

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111969168A (zh) * 2019-05-20 2020-11-20 Oppo广东移动通信有限公司 电池组件和电子设备
WO2021241629A1 (ja) * 2020-05-29 2021-12-02 デクセリアルズ株式会社 保護素子
CN112524389A (zh) * 2020-11-17 2021-03-19 华霆（合肥）动力技术有限公司 液冷管路、漏液检测装置、液冷管路系统和电池包
WO2022150201A3 (en) * 2021-01-08 2022-12-01 Google Llc Battery protection systems for detecting conductive liquid ingress and associated devices and methods
US20230066939A1 (en) * 2021-01-08 2023-03-02 Google Llc Battery Protection Systems for Detecting Conductive Liquid Ingress and Associated Devices and Methods

Also Published As

Publication number Publication date
TWI712791B (zh) 2020-12-11
KR20180039160A (ko) 2018-04-17
CN108028154A (zh) 2018-05-11
TW201809647A (zh) 2018-03-16
CN108028154B (zh) 2020-11-10
JP2017073288A (ja) 2017-04-13
JP6708388B2 (ja) 2020-06-10
KR102024488B1 (ko) 2019-09-23

Similar Documents

Publication Publication Date Title
WO2017061455A1 (ja) 液濡れセンサー、スイッチ素子、バッテリシステム
KR102614725B1 (ko) 배터리 보호 회로 및 이를 포함하는 배터리 팩
JP6151550B2 (ja) 保護素子
TW201633352A (zh) 熔絲元件及電路模組
US20200321175A1 (en) Switch device and protective device
WO2017061454A1 (ja) スイッチ素子、電子部品、バッテリシステム
TW201611069A (zh) 保護元件及保護電路
JP6621255B2 (ja) 保護素子、ヒューズ素子
KR102043051B1 (ko) 보호 소자
JP6030431B2 (ja) 保護素子
JP6712257B2 (ja) 保護素子、ヒューズ素子
TWI621145B (zh) Protective component
WO2015025885A1 (ja) 保護素子
WO2020189225A1 (ja) バッテリパック、保護回路
JP6202992B2 (ja) 保護回路、バッテリ回路、保護素子、保護素子の駆動方法
TWI680482B (zh) 保護元件
JP7390825B2 (ja) 保護素子、バッテリパック
JP4438284B2 (ja) 保護素子及び電池パック
JP2016031863A (ja) 電子部品、回路基板及び電子部品の実装方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16853609

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20187007373

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16853609

Country of ref document: EP

Kind code of ref document: A1