WO2020189225A1 - Bloc-batterie et circuit de protection - Google Patents

Bloc-batterie et circuit de protection Download PDF

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Publication number
WO2020189225A1
WO2020189225A1 PCT/JP2020/008292 JP2020008292W WO2020189225A1 WO 2020189225 A1 WO2020189225 A1 WO 2020189225A1 JP 2020008292 W JP2020008292 W JP 2020008292W WO 2020189225 A1 WO2020189225 A1 WO 2020189225A1
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WO
WIPO (PCT)
Prior art keywords
heat
sensitive element
battery pack
fuse
battery
Prior art date
Application number
PCT/JP2020/008292
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English (en)
Japanese (ja)
Inventor
千智 小森
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
Publication of WO2020189225A1 publication Critical patent/WO2020189225A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • 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

Definitions

  • the present technology relates to a battery pack provided with a protective element that blows a fuse element provided on the charge / discharge current path to cut off the charge / discharge current path, and a protection circuit.
  • lithium-ion secondary batteries have been adopted in many applications from home appliances such as mobile phones and notebook PCs to electric tools and electric vehicles.
  • a lithium-ion secondary battery has a high energy density and is suitable for high output, but when an excessive current is output, it generates heat due to the internal resistance of the battery itself, and there is a risk of causing smoke and ignition. Therefore, in order to ensure the safety of users and electronic devices, in general, a number of protection circuits such as overcharge protection and overdischarge protection are built into the battery pack, and PTC (Positive Temperature Coefficient) elements are charged and discharged. By connecting in series with the current path, it has a function to cut off the input and output of the battery pack in a predetermined case.
  • the element resistance of PTC increases with temperature and the current is limited by that resistance
  • the DC resistance of the circuit increases by connecting PTC, and it is not suitable for applications where a large current is applied.
  • the method of protecting by the protection circuit mainly controls the energizing current by the FET, the DC resistance value can be suppressed low, but the semiconductor has a risk of malfunctioning in a high temperature environment.
  • a method is proposed in which a fuse element is connected on a charge / discharge circuit of a battery cell and the fuse is blown by the heat of a heat generating resistor to cut off the charge / discharge circuit.
  • the FET 102 that switches the energization of the heat generating resistor 101, the battery stack 103 in which the battery cells are connected in series and / or in parallel, and the battery stack 103 are overcharged or overdischarged.
  • a control IC 104 that outputs a control signal to the FET 102 when the battery stack 103 is abnormal, and a fuse 105 connected on 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 heat generating resistor 101 is regulated by the FET 102. Then, when the protection circuit 100 detects an abnormality such as overcharging or overdischarging of the battery stack 103 by the control IC 104, the FET 102 energizes the heat generating resistor 101. As a result, the protection circuit 100 blows the fuse 105 due to the heat generation resistor 101 generating heat, and cuts off the charge / discharge path of the battery stack 103.
  • the control IC 104 for controlling the FET 102 and the FET 102 is required, which causes an increase in the number of parts and an increase in assembling man-hours, and is exposed to a high temperature environment. If the control IC 104 fails in such a case, the fuse 105 may not be blown.
  • This technology has been proposed in view of such conventional circumstances, and is a battery pack and protection using a protective element that can cut off the current path without malfunction even when exposed to a high temperature environment.
  • the purpose is to provide a circuit.
  • the battery pack according to the present technology includes a battery cell, a protective element connected in series with the battery cell, and a heat-sensitive element for controlling the operation of the protective element.
  • the protective element includes an insulating substrate, a first terminal portion and a second terminal portion that are provided apart from the insulating substrate and are connected to the charge / discharge path of the battery cell, and the first terminal portion.
  • a fuse element provided between the second terminal portion and a heat-generating resistor connected in series with the heat-sensitive element to control energization are provided, and the temperature of the heat-sensitive element is at least a predetermined temperature. When heated to, the heat generating resistor is energized so as to generate heat at a temperature at which the fuse element is blown.
  • the protection circuit energizes the first and second electrodes connected to the external circuit and the fuse provided in series on the current path extending between the first and second electrodes. It has a heat-generating resistor that blows the fuse and a heat-sensitive element that controls the energization of the heat-generating resistor. When the heat-sensitive element is heated to a temperature equal to or higher than a predetermined temperature, the heat-generating resistor becomes It is energized so as to generate heat at a temperature at which the fuse is blown.
  • the protective element by operating the protective element with a heat-sensitive element, there is no risk of malfunction even when exposed to a high temperature environment, and the charge / discharge current path of the battery cell can be reliably cut off.
  • FIG. 1 is a circuit diagram showing a configuration example of a battery pack to which the present technology is applied.
  • 2A and 2B are views showing a protective element
  • FIG. 2A is a plan view showing the cover member omitted
  • FIG. 2B is a cross-sectional view taken along the line XX'.
  • FIG. 3 is a perspective view showing an example of the fuse element.
  • FIG. 4 is a circuit diagram of a battery pack using a thermostat as a heat-sensitive element.
  • FIG. 4A shows a state before the thermostat is heated
  • FIG. 4B shows a state where the thermostat is heated and the fuse element is blown.
  • FIG. 5 is a circuit diagram of a battery pack using a thermistor as a heat sensitive element.
  • FIG. 6 is a circuit diagram of a battery pack using a diode as a heat sensitive element.
  • FIG. 7 is a circuit diagram of a battery pack equipped with a protection IC and a switch for detecting an abnormal voltage of a battery stack or a battery cell in addition to a heat-sensitive element.
  • FIG. 8 is a diagram showing a circuit configuration of a conventional battery pack.
  • the battery pack to which the present technology is applied can be configured as, for example, the battery pack 10 of a lithium ion secondary battery.
  • the battery pack 10 shown in FIG. 1 controls, for example, the operation of a battery stack 15 composed of battery cells 15a of a plurality of lithium ion secondary batteries, a protective element 11 connected in series with the battery stack 15, and the protective element 11. It has a heat-sensitive element 12 to perform.
  • the protective element 11 cuts off the charge / discharge path of the battery stack 15 when the battery pack 10 is abnormal.
  • the heat-sensitive element 12 operates the protective element 11 when it is heated to a temperature equal to or higher than a predetermined temperature due to fluctuations in electrical characteristics such as conduction on / off, resistance value, and output voltage due to heat. That is, in the battery pack 10, the operation of the protection element 11 is controlled according to the fluctuation of the electrical characteristics of the heat sensitive element 1.
  • the battery stack 15 is formed by connecting battery cells 15a that require control for protection from overvoltage, overcurrent, etc. in series and / or in parallel, and is attached / detached via the positive electrode terminals 10a and the negative electrode terminals 10b of the battery pack 10. It is possible to connect to the charging device 13 and apply the charging voltage from the charging device 13.
  • 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 battery pack 10 has a charge / discharge control circuit 16 that controls charging / discharging of the battery stack 15.
  • the charge / discharge control circuit 16 includes two current control elements 17 and 18 connected in series to the current path flowing from the battery stack 15 to the charging device 13, and a control unit 19 for controlling the operation of these current control elements 17 and 18.
  • the current control elements 17 and 18 are composed of, for example, field effect transistors (hereinafter referred to as FETs), and by controlling the gate voltage by the control unit 19, the charging direction and / or discharging direction of the current path of the battery stack 15 Controls continuity and interruption to.
  • FETs field effect transistors
  • the control unit 19 operates by receiving power from the charging device 13, and when the battery stack 15 is over-discharged or over-charged, depending on the detection result by a detection circuit (not shown) that detects the voltage of each battery cell 15a.
  • the operation of the current control elements 17 and 18 is controlled so as to cut off the current path.
  • the protective element 11 is connected on, for example, a charge / discharge current path between the battery stack 15 and the charge / discharge control circuit 16, and its operation is controlled by the heat-sensitive element 12.
  • the protective 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.
  • the heating element 24 formed on the surface of the heating element 24, the insulating layer 27 covering the heating element 24, the heating element extraction electrode 21 laminated on the insulating layer 27 and connected to the heating element 24, and the first The electrode 22, the heating element extraction electrode 21, and the fuse element 20 mounted over the second electrode 23 via the connecting solder 28 are provided.
  • the first and second electrodes 22 and 23 are first and second terminal portions connected to the charge / discharge path of the battery cell 15a, and the first and second electrodes 22 and 23 are formed on the back surface of the insulating substrate 26, respectively. It is connected to the external connection electrodes 22a and 23a of the above via casting. Further, the heating element 24 is connected to the heating element feeding electrode 25, and is connected to the heat sensitive element 12 via the heating element feeding electrode 25. Further, the heating element 24 is connected to the charge / discharge path of the fuse element 20 and the battery stack 15 by electrically connecting the heating element extraction electrode 21 to the fuse element 20.
  • the insulating substrate 26 is formed in a substantially rectangular shape, for example, by using an insulating member such as alumina, glass ceramics, mullite, or zirconia.
  • the insulating substrate 26 may use a material used for a printed wiring board such as a glass epoxy board or a phenol substrate.
  • the first and second electrodes 22 and 23 are formed on both ends of the insulating substrate 26 facing each other.
  • the first and second electrodes 22 and 23 are each formed by a conductive pattern such as Ag or Cu. Further, the first and second electrodes 22 and 23 are continuous from the front surface 26a of the insulating substrate 26 to the first and second external connection electrodes 22a and 23a formed on the back surface 26b via the casting. ..
  • the first and second external connection electrodes 22a and 23a formed on the back surface 26b of the insulating substrate 26 are connected to the connection electrodes provided on the external circuit board on which the protective element 11 is mounted.
  • the fuse element 20 is incorporated into a part of the current path formed on the circuit board.
  • the heat generation resistor 24 is a conductive member having a relatively high resistance value and generates heat when energized, and is made of, for example, nichrome, W, Mo, Ru, or a material containing these.
  • the heat generation resistor 24 is formed by mixing powders of these alloys, compositions, and compounds with a resin binder or the like to form a paste, forming a pattern on the insulating substrate 26 using screen printing technology, and firing the heat-generating resistor 24. It can be formed by such as.
  • the heat generating resistor 24 is thermally connected by superimposing the fuse element 20, and blows the fuse element 20 when heat is generated by energization. Since one end of the heat generation resistor 24 is connected to the heat sensitive element 12, the current and heat generation are constantly regulated. Then, the heat generating resistor 24 can increase the amount of heat generated by increasing the current due to energization by the heat sensitive element 12 or a decrease in the electric resistance value, and can blow the fuse element 20. As will be described later, the heat generating resistor 24 is also electrically connected to the fuse element 20.
  • the fuse element 20 is connected to the protection element 11 from the first electrode 22 to the second electrode 23 by a connecting solder 28.
  • the fuse element 20 conducts electricity between the first and second electrodes 22 and 23 during normal use, and forms a part of a current path of an external circuit in which the protection element 11 is incorporated. Then, the fuse element 20 is blown by self-heating (Joule heat) when a current exceeding the rating is energized, or blown by the heat generated by the heat generating resistor 24, and cuts off between the first and second electrodes 22 and 23.
  • self-heating Jooule heat
  • the fuse element 20 has a predetermined rated current value, and is quickly blown by the heat generated by the heat generating resistor 24 or by self-heating when a current exceeding the rated current value is applied.
  • the fuse element 20 preferably contains any one selected from nickel, tin, and lead as a main component.
  • a principal component means a component which is 50 wt% or more based on the total mass of a material.
  • the fuse element 20 may have a laminated structure in which the low melting point metal layer 41 and the high melting point metal layer 42 are laminated.
  • the 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 protective element 11 is reflow-mounted by containing the high-melting-point metal and the low-melting-point metal, even if the reflow temperature exceeds the melting temperature of the low-melting-point metal layer and the low-melting-point metal melts, the fuse element 20 It does not melt as.
  • the inner layer may be a low melting point metal and the outer layer may be a high melting point metal.
  • the inner layer is mounted at the time of reflow mounting. The outflow of low melting point metal to the outside can be suppressed. Further, even at the time of fusing, the low melting point metal in the inner layer is melted, so that the high melting point metal in the outer layer is eroded (soldered) and can be quickly melted.
  • the protective element 11 has a cover member 34 mounted on the surface 26a of the insulating substrate 26 provided with the fuse element 20 to protect the inside and prevent the molten fuse element 20 from scattering.
  • the cover member 34 can be formed of a member having an insulating property such as various engineering plastics and ceramics.
  • the cover member 34 is connected to the surface 26a of the insulating substrate 26 with an insulating adhesive or the like, thereby covering the fuse element 20.
  • Heat sensitive element As the heat-sensitive element 12, an electronic component whose electrical characteristics have temperature dependence can be used. For example, as shown in FIG. 4, a thermostat that opens and closes a circuit according to a change in ambient temperature can be used.
  • the heat-sensitive element 3 is thermally connected by being arranged close to or in contact with the battery stack 15, and is heated by abnormal heat generation of the battery stack 15. As a result, the heat-sensitive element 12 changes its electrical characteristics such as resistance value and output voltage.
  • the thermostat 12a is mounted on an insulating substrate (not shown), and as shown in FIG. 4A, one end thereof is an open end of the battery stack 15. The other end is connected to the heat generating resistor 24 of the protection element 11.
  • the thermostat 12a always opens the energization path from the battery stack 15 to the heat generating resistor 24.
  • the thermostat 12a when the thermostat 12a is heated due to abnormal heat generation of the battery stack 15, the thermostat 12a is displaced so as to close the energization path from the battery stack 15 to the heat generating resistor 24, thereby causing a fuse. Sufficient power from the battery stack 15 to blow the element 20 energizes the heating resistor 24.
  • a negative characteristic thermistor 12b (NTC thermistor, CTR thermistor) whose resistance value decreases as the ambient temperature rises can be used as shown in FIG.
  • a diode 12c whose voltage changes when the temperature exceeds the threshold value can be used.
  • examples of the heat-sensitive element 12 include a Peltier element, a thermocouple, a bimetal, and a temperature sensor.
  • the heat sensitive element 12 is thermally connected by being provided in close proximity to or in contact with the exterior of the battery cell 15a.
  • the heat sensitive element 12 may be provided in contact with the exterior of the battery pack 10.
  • a sheet-like or grease-like heat conductive material may be interposed between the heat-sensitive element 12 and the exterior of the battery cell 15a or the exterior of the battery pack 10.
  • the battery pack 10 may be provided with one heat-sensitive element 12 for the battery stack 15, or may be provided with the heat-sensitive element 12 for each battery cell 15a.
  • one heat-sensitive element 12 may be provided for the plurality of battery cells 15a.
  • Such a protection element 11 has a circuit configuration as shown in FIGS. 1 and 4 (A). That is, the protection element 11 blows the fuse element 20 by energizing the fuse element 20 connected in series between the first and second electrodes 22 and 23 and generating heat through the connection point of the fuse element 20. It is a circuit configuration including a heat generating resistor 24. Further, the protective element 11 is formed with an energization path to the heat sensitive element 12 (thermostat 12a), the heating element feeding electrode 25, the heating element 24, and the heating resistor 24 leading to the fuse element 20, and is formed by the heat sensitive element 12. The energization of the heating element is controlled.
  • the first electrode 22 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 the second outside. It is connected to the positive electrode terminal 10a side of the battery pack 10 via the connection electrode 23a, whereby the fuse element 20 is placed on the charge / discharge current path of the battery pack 10 via the first and second external connection electrodes 22a and 23a. It is connected in series.
  • the protection element 11 is connected to one open end of the battery stack 15 in which the heating element feeding electrode 25 energizes the heating element 24, and the heat sensitive element 12 (thermostat 12a) regulates the energization of the heating element 24. Has been done. Therefore, the fuse element 20 is not blown by the heat generated by the heat generating resistor 24, and the charge / discharge current path of the battery pack 10 can be energized.
  • the heat sensitive element 12 (thermostat 12a) Is heated and exceeds a predetermined threshold value, the energization path to the heat generating resistor 24 is closed. As a result, the heat generating resistor 24 is energized from the battery stack 15. As a result, in the protection element 11, the heat generation resistor 24 is heated to a high temperature, and the fuse element 20 incorporated in the current path of the battery pack 10 is melted.
  • the molten conductor of the fuse element 20 is attracted to the heating element extraction electrode 21 and the first and second electrodes 22 and 23, which have high wettability, so that the fuse element 20 is blown. Therefore, the battery pack 10 can blow the space between the first electrode 22 and the heating element extraction electrode 21 to the second electrode 23 (FIG. 4B) to cut off the current path of the battery stack 15.
  • Such a battery pack 10 can cut off the charge / discharge current path of the battery stack 15 by operating the protective element by the heat sensitive element 12. Therefore, regardless of the switch operation of the current control elements 17 and 18 and the control IC that controls the protection element, there is no risk of malfunction even when exposed to a high temperature environment, and the charge / discharge current path of the battery stack 15 is cut off. be able to.
  • the protection element 11 constitutes a part of the energization path to the heat generation resistor 24 by connecting the fuse element 20 to the heat generation resistor 24. Therefore, when the fuse element 20 is melted and the connection with the external circuit is cut off, the protection element 11 can stop the heat generation because the energization path to the heat generation resistor 24 is also cut off.
  • the battery pack 10 detects the voltage of the entire battery stack 15 and / or the abnormal voltage of each battery cell 15a in addition to the heat-sensitive element 12, and operates the protection element 11 by operating a switch.
  • a switch circuit 50 may be provided.
  • the switch circuit 50 includes a protection IC 51 that monitors the voltage of the entire battery stack 15 and / or the voltage of each battery cell 15a, and a switch S52 that is operated by the protection IC 51.
  • the switch S52 is, for example, an FET, and is connected to the battery stack 15 or one open end of the battery cell 15a and is connected to the heat generating resistor 24 of the protection element 11 to cause the heat sensitive element 12 (thermistor in FIG. 7). It is in parallel with 12b). Further, the switch S52 is switched and controlled between the ON state and the OFF state by the protection IC 51.
  • the protection IC 51 is connected to, for example, the battery stack 15 and both open ends of each battery cell 15a, constantly monitors the voltage of the entire battery stack 15 and / or the voltage of each battery cell 15a, and switches the switch S52 on when an abnormal voltage is generated.
  • the heat generation resistor 24 is energized.
  • the Protection IC 51 detects whether or not there is an overvoltage based on the voltage across the battery stack 15 and / or the battery cell 15a.
  • the Protection IC 51 detects that the voltage of the battery stack 15 or the battery cell 15a is overvoltage when the battery cell voltage exceeds a preset threshold value during charging.
  • the protection IC 51 controls the switch S52 from the off state to the on state.
  • the protection element 11 operates and the fuse element 20 is blown, so that the charge / discharge current path of the battery stack 15 can be cut off.
  • the heat-sensitive element 12 is provided in parallel with the charge / discharge path of the battery stack 15, but the heat-sensitive element 12 is on a path electrically independent of the charge / discharge path of the battery stack 15. Power may be supplied from a power source provided separately.
  • the battery pack of the present invention is not limited to the case of being used for the battery pack 10 of the lithium ion secondary battery, and of course, it can be applied to various applications requiring interruption of the current path in the event of abnormal overheating.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Protection Of Static Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un bloc-batterie utilisant un élément de protection pouvant bloquer un chemin de courant sans entraîner de dysfonctionnements même lorsqu'il est exposé à un environnement à haute température.　Ce bloc-batterie comprend un élément de batterie (15a), un élément de protection (11) connecté en série avec l'élément de batterie (15a), et un élément thermosensible (12) qui commande le fonctionnement de l'élément de protection (11). L'élément de protection (11) comporte un substrat isolant (26), une première partie de borne (22) et une deuxième partie de borne (23) qui sont disposées loin du substrat isolant (26) et connectées à un chemin de charge/décharge de l'élément de batterie (15a), un élément de fusible (20) disposé de manière à s'étendre de la première partie de borne (22) à la deuxième partie de borne (23), et une résistance chauffante (24) connectée en série à l'élément thermosensible (12), et lorsque l'élément thermosensible (12) est chauffé à une température supérieure ou égale à une température préétablie, l'élément de protection est excité de sorte que la résistance chauffante (24) génère de la chaleur à une température à laquelle l'élément de fusible (20) fond.
PCT/JP2020/008292 2019-03-15 2020-02-28 Bloc-batterie et circuit de protection WO2020189225A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019048092A JP7321731B2 (ja) 2019-03-15 2019-03-15 バッテリパック、保護回路
JP2019-048092 2019-03-15

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WO2020189225A1 true WO2020189225A1 (fr) 2020-09-24

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TW (1) TW202042426A (fr)
WO (1) WO2020189225A1 (fr)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN116699425B (zh) * 2023-07-28 2024-04-12 荣耀终端有限公司 一种电池检测方法、电子设备、存储介质及程序产品

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152055A (ja) * 1991-11-29 1993-06-18 Sharp Corp 電気カーペツト等の安全装置
JP2001126903A (ja) * 1995-02-28 2001-05-11 Sony Chem Corp 保護素子
JP2002204525A (ja) * 2000-12-28 2002-07-19 Sanyo Electric Co Ltd ブレーカとブレーカを内蔵するパック電池

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3825387B2 (ja) * 2002-10-09 2006-09-27 ソニーケミカル＆インフォメーションデバイス株式会社 保護回路付き二次電池
JP2008288046A (ja) * 2007-05-17 2008-11-27 Sanyo Electric Co Ltd パック電池

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05152055A (ja) * 1991-11-29 1993-06-18 Sharp Corp 電気カーペツト等の安全装置
JP2001126903A (ja) * 1995-02-28 2001-05-11 Sony Chem Corp 保護素子
JP2002204525A (ja) * 2000-12-28 2002-07-19 Sanyo Electric Co Ltd ブレーカとブレーカを内蔵するパック電池

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JP2020150748A (ja) 2020-09-17
TW202042426A (zh) 2020-11-16

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