WO2018094840A1 - Dispositif de protection de batterie et procédé de protection de batterie - Google Patents

Dispositif de protection de batterie et procédé de protection de batterie Download PDF

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Publication number
WO2018094840A1
WO2018094840A1 PCT/CN2016/113499 CN2016113499W WO2018094840A1 WO 2018094840 A1 WO2018094840 A1 WO 2018094840A1 CN 2016113499 W CN2016113499 W CN 2016113499W WO 2018094840 A1 WO2018094840 A1 WO 2018094840A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery cell
temperature
circuit
switch
Prior art date
Application number
PCT/CN2016/113499
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English (en)
Chinese (zh)
Inventor
刘毅
赖文华
Original Assignee
宇龙计算机通信科技(深圳)有限公司
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.)
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Publication date
Application filed by 宇龙计算机通信科技(深圳)有限公司 filed Critical 宇龙计算机通信科技(深圳)有限公司
Publication of WO2018094840A1 publication Critical patent/WO2018094840A1/fr

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Classifications

    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • 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 invention relates to the field of battery protection technologies, and in particular, to a battery protection device and a battery protection method.
  • the temperature of the battery is mainly monitored by the change of the resistance value of the negative temperature coefficient thermistor (NTC), but the NTC is placed on the battery protection board, and only the average of the battery protection board can be detected. temperature.
  • the battery cell is the most temperature sensitive core device in the battery, but because the battery cell is wrapped by an aluminum plastic film, it is difficult for the NTC to directly detect the internal temperature of the battery cell. Many times in real life, because the battery is in use, the battery is self-igniting due to the high temperature of the battery, which seriously affects the user's personal safety.
  • a battery protection device the battery protection device being connected to a battery pack, the battery protection device comprising a temperature control chip and a first switch, the battery package comprising a battery cell and a temperature measuring component;
  • the temperature measuring component is configured to measure a temperature of the battery cell
  • One end of the temperature control chip is connected to the temperature measuring component, the other end of the temperature control chip is connected to the first switch, and the first switch is connected to a charging circuit or a discharging circuit of the battery cell. ;
  • the temperature control chip acquires a temperature of the battery cell measured by the temperature measuring component, and controls charging or discharging of the battery cell by controlling the first switch according to a temperature of the battery cell .
  • the first switch when the battery cell is in a charging state, the first switch is connected to a charging negative circuit or a charging positive circuit of the battery cell; or
  • the first switch When the battery cell is in a discharging state, the first switch is connected to a discharge negative circuit or a discharge positive circuit of the battery cell.
  • the temperature control chip disconnects the first switch to disconnect the charging circuit of the battery cell or discharge Loop.
  • the temperature control chip acquires the temperature of the battery cell again through the temperature measuring component, and updates the temperature of the battery cell;
  • the temperature control chip closes the first switch and turns on a charging circuit or a discharging circuit of the battery cell.
  • the battery protection device further includes a second switch, a voltage protection chip, and a fuse;
  • the second switch is connected to a charging circuit or a discharging circuit of the battery cell, and the voltage protection chip is configured to collect a voltage of the battery pack, and one end of the voltage protection chip is connected to the second switch.
  • the second switch is connected on the charging positive circuit or the discharging positive circuit, the other end of the voltage protection chip is connected to the negative electrode interface of the battery cell, or when the second switch is connected to the charging negative circuit
  • the upper or the discharge negative circuit is connected, the other end of the voltage protection chip is connected to the positive electrode interface of the battery cell;
  • the fuse is connected to a charging positive circuit of the battery cell or to a discharge positive circuit, and the fuse is used to collect a charging current or a discharging current of the battery cell.
  • the voltage protection chip when the voltage of the battery pack collected by the voltage protection chip is higher than the first preset voltage, the voltage protection chip disconnects the second switch, and the battery cell is cut off. Charging circuit or discharging circuit; or
  • the fuse automatically cuts off the charging circuit or the discharging circuit when the charging current or the discharging current of the battery cell detected by the fuse is higher than the first preset current.
  • a battery protection method is applied to a battery protection device, the method comprising:
  • the first switch of the battery protection device is disconnected to disconnect the charging circuit or the discharging circuit of the battery cell.
  • the method further includes:
  • the first switch When the temperature of the updated battery cell is less than or equal to a preset temperature value, the first switch is closed, and the charging circuit or the discharging circuit of the battery cell is turned on.
  • the method further includes:
  • the second switch When the collected voltage of the battery pack is higher than the first preset voltage, the second switch is turned off, and the charging circuit or the discharging circuit of the battery cell is cut off.
  • the method further includes:
  • the current of the charging circuit or the discharging circuit is automatically cut off.
  • the temperature of the battery cell can be collected by the temperature measuring component, and the temperature control chip controls the first switch by controlling the temperature of the battery cell according to the temperature of the battery cell.
  • the charging or discharging of the battery cells can effectively prevent the battery explosion caused by the excessive temperature of the battery cells.
  • FIG. 1 is a schematic view of a battery protection device according to a first preferred embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a battery protection device according to another embodiment of the present invention.
  • FIG. 3 is a flow chart of a preferred embodiment of the battery protection method of the present invention.
  • Battery protection device 1 Battery pack 10 Battery cell 101 Temperature measuring element 102 Temperature control chip 11 First switch 12 Second switch 13 Voltage protection chip 14 resistance 15 Negative temperature coefficient thermistor 16 fuse 17
  • FIG. 1 is a schematic diagram of a battery protection device according to a first preferred embodiment of the present invention.
  • the battery protection device 1 is connected to a battery pack 10.
  • the battery protection device 1 provided in at least one embodiment of the present invention includes a temperature control chip 11 and a first switch 12.
  • the battery pack 10 internally includes a battery cell 101 and a temperature measuring element 102.
  • the battery cell 101 is used for energy storage and supply.
  • the battery protection device 1 may be a device such as a circuit.
  • the temperature measuring component 102 is used to measure the temperature of the battery cell 101.
  • the temperature measuring component 102 can be a temperature sensitive resistor, a temperature sensor (such as a thermocouple, etc.).
  • One end of the temperature control chip 11 is connected to the temperature measuring component 102, the other end of the temperature control chip 11 is connected to the first switch 12, and the first switch 12 is connected to the battery cell 101. On the charging circuit or the discharging circuit.
  • the temperature control chip 11 acquires the temperature of the battery cell 101 measured by the temperature measuring component 102, and controls the battery power by controlling the first switch 12 according to the temperature of the battery cell 101. Charging or discharging of the core 101.
  • the temperature control chip 11 when the first switch 12 is connected to a charging circuit of the battery cell 101, the temperature control chip 11 controls charging of the battery cell 101 when the first When a switch 12 is connected to the discharge circuit of the battery cell 101, the temperature control chip 11 controls the discharge of the battery cell 101.
  • the temperature control chip 11 controls the state of the first switch 12 in accordance with the temperature of the battery cell 101 to control charging or discharging of the battery cell 101.
  • the charging circuit or the discharging circuit is in an on state, and the battery cell 101 is charged or discharged.
  • the charging circuit or the discharging circuit is in an off state, and the battery cell 101 cannot be charged or discharged.
  • the first switch 12 is connected to a charging negative circuit or a discharging negative circuit of the battery cell 101 , and one end of the first switch 12 is connected to a negative interface of the battery cell 101 .
  • the other end of the first switch 12 is connected to the negative interface of the battery protection device 1.
  • the charging circuit or the discharging circuit is in an on state, and the negative terminal of the battery cell 101 and the negative interface of the battery protection device 1 can perform data transmission. That is, the battery cell 101 can be charged or discharged.
  • the first switch 12 is in an off state, the charging circuit or the discharging circuit is in an off state, and the negative interface of the battery cell 101 and the negative interface of the battery protection device 1 cannot perform data transmission. That is, the battery cell 101 cannot be charged or discharged.
  • the first switch 12 is connected to the charging positive circuit or the discharging positive circuit of the battery cell 101, and one end of the first switch 12 is connected to the positive interface of the battery cell 101. And the other end of the first switch 12 is connected to the positive interface of the battery protection device 1.
  • the temperature control chip 11 can include a processor, a memory, and the like.
  • the memory is used to store a program of a battery protection method and various data, and to realize high-speed, automatic completion of access of programs or data during operation of the battery protection device 1.
  • the memory may be an external storage device and/or an internal storage device of the battery protection device 1.
  • the memory may be a circuit having a storage function in a physical form, such as a RAM (Random-Access Memory), a FIFO (First In First Out), or the like.
  • the memory may also be a storage device having a physical form, such as a memory stick, a TF card, or the like.
  • the processor is an operation core (Core) and a control unit of the battery protection device 1.
  • the processor can execute various types of application programs, program codes, and the like installed in the battery protection device 1.
  • connection relationship of the respective components in the battery protection device 1 is not limited to the above embodiment, and the first switch 12 may be connected to other components as well.
  • FIG. 2 is a schematic diagram of a battery protection device according to another embodiment.
  • the battery protection device 1 further includes a second switch 13, a voltage protection chip 14, a resistor 15, a negative temperature coefficient thermistor 16, and a fuse 17.
  • the second switch 13 is connected to a charging circuit or a discharging circuit of the battery cell 101, and the voltage protection chip 15 is configured to collect the voltage of the battery pack 10, One end of the voltage protection chip 101 is connected to the second switch 13.
  • the second switch 13 When the second switch 13 is connected to the charging positive circuit of the battery cell 101 or to the discharge positive circuit, the other end of the voltage protection chip 15 is connected to the negative terminal of the battery cell 101.
  • the second switch 13 is connected to the charging negative circuit or the discharging negative circuit, the other end of the voltage protection chip 15 is connected to the positive terminal of the battery cell 101.
  • the voltage protection chip 15 turns off the second switch 13, and cuts off the battery cell 101. Charging circuit or discharging circuit.
  • the fuse 17 is used to collect a charging current or a discharging current of the battery cell 101.
  • the fuse 17 is connected to the charging positive circuit of the battery cell 101 or to the discharge positive circuit.
  • the fuse 17 detects that the charging current or the discharging current of the battery cell 101 is higher than the first predetermined current, the fuse 17 automatically cuts off the current of the charging circuit or the discharging circuit of the battery cell 101.
  • the resistor 15 is a fixed resistance for identifying the type or capacity of the battery cell 15. As shown in FIG. 2, one end of the resistor 15 is connected to a data pin (ID interface) of the battery protection device 1, and the other end of the resistor 15 is connected to a charging negative circuit.
  • ID interface data pin
  • the negative temperature coefficient thermistor 16 is used to detect the average temperature of the battery protection device 1. As shown in FIG. 2, one end of the negative temperature coefficient thermistor 16 is connected to the temperature pin of the battery protection device 1, and the other end of the negative temperature coefficient thermistor 16 is connected to the charging negative circuit.
  • the present invention is not limited to the above-described circuit of FIG. 1 and FIG. 2, and those skilled in the art can easily infer the remaining embodiments of the above circuit after the disclosure of the present invention. , do not add to the description here.
  • FIG. 4 is a flow chart of a preferred embodiment of the battery protection method of the present invention. The order of the steps in the flowchart may be changed according to different requirements, and some steps may be omitted.
  • the temperature control chip 11 acquires the temperature of the battery cell 101 through the temperature measuring component 102.
  • the temperature measuring component 102 collects the temperature of the battery cell 101 and transmits the temperature of the battery cell 101 to the temperature control chip 11.
  • the temperature control chip 11 determines whether the temperature of the battery cell 101 is greater than or equal to a preset maximum temperature value.
  • the temperature control chip 11 turns off the first switch 12 to disconnect charging or discharging of the battery cell 101.
  • the temperature control chip 11 acquires the temperature of the battery cell 101 again through the temperature measuring component 102, and updates the temperature of the battery cell 101.
  • the temperature control chip 11 determines whether the temperature of the updated battery cell 101 is less than a preset temperature value.
  • the temperature control chip 11 closes the first switch 12, and turns on the charging circuit or discharge of the battery cell 101. Loop.
  • the voltage protection chip 15 when the voltage of the battery pack 10 collected by the voltage protection chip 15 is higher than the first preset voltage, the voltage protection chip 15 turns off the second switch 13 Turning off the charging circuit or the discharging circuit of the battery cell 101.
  • the fuse 17 When the fuse 17 detects that the charging current or the discharging current of the battery cell 101 is higher than the first predetermined current, the fuse 17 automatically cuts off the current of the charging circuit or the discharging circuit of the battery cell 101.
  • an electronic device may include the battery protection device 1.
  • the electronic device is a device capable of automatically performing numerical calculation and/or information processing according to an instruction set or stored in advance, and the hardware thereof includes but is not limited to a microprocessor and an application specific integrated circuit (ASIC). , Field-Programmable Gate Array (FPGA), Digital Signal Processor (DSP), embedded devices, etc.
  • ASIC application specific integrated circuit
  • FPGA Field-Programmable Gate Array
  • DSP Digital Signal Processor
  • the electronic device further includes, but is not limited to, any electronic product that can interact with a user through a keyboard, a mouse, a remote controller, a touch panel or a voice control device, for example, a personal computer, a tablet computer, or a smart phone. , Personal Digital Assistant (PDA), game consoles, Internet Protocol Television (IPTV), smart wearable devices, etc.
  • PDA Personal Digital Assistant
  • IPTV Internet Protocol Television
  • the temperature of the battery cell 101 can be collected by the temperature measuring component 102, and the temperature control chip 11 controls the battery power by controlling the first switch 12 according to the temperature of the battery cell 101.
  • the charging or discharging of the core 101 can effectively prevent the battery explosion caused by the excessive temperature of the battery core.
  • the above-described integrated unit implemented in the form of a software function module can be stored in a computer readable storage medium.
  • the software function modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps.
  • modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional module in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software function modules.

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

Abstract

L'invention concerne un dispositif de protection de batterie (1) et un procédé de protection de batterie. Le dispositif de protection de batterie (1) est connecté à un bloc-batterie (10). Le dispositif de protection de batterie comprend une puce de régulation de la température (11) et un premier commutateur (12). Le bloc-batterie comprend un élément de batterie (101) et un élément de mesure de la température (102). L'élément de mesure de la température est utilisé pour mesurer la température de l'élément de batterie. Une extrémité de la puce de régulation de la température est connectée à l'élément de mesure de la température, et l'autre extrémité de la puce de régulation de la température est connectée au premier commutateur. Le premier commutateur est connecté à une boucle de charge ou à une boucle de décharge de l'élément de batterie. La puce de régulation de la température acquiert la température de l'élément de batterie mesurée par l'élément de mesure de la température et commande la charge ou la décharge de l'élément de batterie en commandant le premier commutateur et en fonction de la température de l'élément de batterie. Le dispositif et le procédé de protection de batterie se révèlent efficaces pour ce qui est d'empêcher l'explosion d'une batterie provoquée par une température excessivement élevée d'un élément de batterie.
PCT/CN2016/113499 2016-11-23 2016-12-30 Dispositif de protection de batterie et procédé de protection de batterie WO2018094840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611038668.0A CN106486976A (zh) 2016-11-23 2016-11-23 电池保护装置及电池保护方法
CN201611038668.0 2016-11-23

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WO2018094840A1 true WO2018094840A1 (fr) 2018-05-31

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CN109004294A (zh) * 2018-06-21 2018-12-14 枣庄亿新电子科技有限公司 一种锂电池过热保护装置
CN112952217A (zh) * 2019-11-25 2021-06-11 北京新能源汽车股份有限公司 一种电芯电压采集装置、方法及电动汽车
JP2022542721A (ja) * 2020-06-17 2022-10-07 東莞新能安科技有限公司 電池保護回路、電池管理システム、電池装置及びその制御方法
WO2023240637A1 (fr) * 2022-06-17 2023-12-21 北京小米移动软件有限公司 Procédé de détection de température de batterie, circuit de détection de température de batterie et appareil

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CN109245225A (zh) * 2018-10-22 2019-01-18 Oppo广东移动通信有限公司 电子设备及其充电控制装置和方法
CN109585765A (zh) * 2019-01-07 2019-04-05 广西汽车集团有限公司 一种电池包、电池包控制系统及控制方法
CN109803047B (zh) * 2019-03-11 2021-07-02 台州职业技术学院 一种智能手机电池防爆监测装置
CN110161416A (zh) * 2019-06-13 2019-08-23 上海钧正网络科技有限公司 一种电池监测装置、方法及电池
CN110843600A (zh) * 2019-11-26 2020-02-28 安徽江淮汽车集团股份有限公司 电池充电管理方法、装置、终端设备及存储介质
CN111668901B (zh) * 2020-06-17 2023-04-18 东莞新能安科技有限公司 电池保护电路、电池管理系统、电池装置及其控制方法
CN112009293A (zh) * 2020-08-21 2020-12-01 缙云县锐普电子科技有限公司 一种电池充电柜检测系统以及电池充电柜
CN113489117A (zh) * 2021-09-06 2021-10-08 成都宇能通能源开发有限公司 一种混合式开关器件可并联扩展的电池管理系统
CN116666792B (zh) * 2023-06-30 2024-05-10 苏州融硅新能源科技有限公司 电池系统的充放电控制方法和电池系统

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CN109004294A (zh) * 2018-06-21 2018-12-14 枣庄亿新电子科技有限公司 一种锂电池过热保护装置
CN112952217A (zh) * 2019-11-25 2021-06-11 北京新能源汽车股份有限公司 一种电芯电压采集装置、方法及电动汽车
JP2022542721A (ja) * 2020-06-17 2022-10-07 東莞新能安科技有限公司 電池保護回路、電池管理システム、電池装置及びその制御方法
JP7377860B2 (ja) 2020-06-17 2023-11-10 東莞新能安科技有限公司 電池保護回路、電池管理システム、電池装置及びその制御方法
WO2023240637A1 (fr) * 2022-06-17 2023-12-21 北京小米移动软件有限公司 Procédé de détection de température de batterie, circuit de détection de température de batterie et appareil

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