WO2017201736A1 - 电池保护板、电池和移动终端 - Google Patents

电池保护板、电池和移动终端 Download PDF

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Publication number
WO2017201736A1
WO2017201736A1 PCT/CN2016/083693 CN2016083693W WO2017201736A1 WO 2017201736 A1 WO2017201736 A1 WO 2017201736A1 CN 2016083693 W CN2016083693 W CN 2016083693W WO 2017201736 A1 WO2017201736 A1 WO 2017201736A1
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WO
WIPO (PCT)
Prior art keywords
battery
charging
circuit
battery protection
mobile terminal
Prior art date
Application number
PCT/CN2016/083693
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English (en)
French (fr)
Inventor
田晨
张加亮
Original Assignee
广东欧珀移动通信有限公司
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.)
Filing date
Publication date
Application filed by 广东欧珀移动通信有限公司 filed Critical 广东欧珀移动通信有限公司
Priority to CN201680001775.8A priority Critical patent/CN106663958B/zh
Priority to PCT/CN2016/083693 priority patent/WO2017201736A1/zh
Priority to JP2018554754A priority patent/JP6665317B2/ja
Priority to KR1020187029583A priority patent/KR102121545B1/ko
Priority to PCT/CN2017/085793 priority patent/WO2017202349A1/en
Priority to US15/606,463 priority patent/US10644520B2/en
Publication of WO2017201736A1 publication Critical patent/WO2017201736A1/zh

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Classifications

    • 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
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0091—
    • 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

  • Embodiments of the present invention relate to the field of mobile terminals, and, more particularly, to a battery protection board, a battery, and a mobile terminal.
  • mobile terminals such as smart phones
  • the security of mobile terminals has become the focus of users.
  • the present application provides a battery protection board and a battery suitable for a mobile terminal, and provides a mobile terminal.
  • a battery protection board includes: a protection circuit connected to a charge and discharge circuit of a battery in a mobile terminal, wherein the protection circuit is configured to control conduction and shutdown of the charge and discharge circuit;
  • the wire is connected in series in the charging and discharging circuit, the wire is located in a first window opening area of the battery protection board;
  • a battery fuel gauge the battery fuel meter is connected to both ends of the wire, and the battery is passed through
  • the battery fuel gauge detects a voltage drop generated by the impedance of the wire, and determines the power of the battery according to the voltage drop;
  • the heat dissipation plate one end of the heat dissipation plate passes An insulating heat conductive material is connected to the first window opening area, and the other end of the heat dissipation plate is connected to a second window opening area of the battery protection board, and the heat dissipation board transmits heat of the first window opening area The second window opening area.
  • a battery comprising a battery cell, and a battery protection plate as described in the first aspect, the battery protection plate being coupled to the battery cell.
  • a mobile terminal comprising a charging interface, and a battery as described in the second aspect, the battery being coupled to the charging interface.
  • the heat sink is soldered to the second fenestration region of the battery protection panel.
  • the heat generation of the second window opening region is lower than the heat generation of the first window opening region.
  • the material of the heat sink is copper.
  • the insulating thermally conductive material is an insulating thermally conductive silicone.
  • the battery protection board further includes: a temperature detecting circuit for detecting a temperature of the battery; the battery fuel gauge is connected to the temperature detecting circuit, and the battery fuel gauge is specifically used for Determining an impedance of the wire according to a temperature detected by the temperature detecting circuit and a correspondence between a temperature and an impedance (or resistance) of the wire (ie, determining the wire at a temperature detected by the temperature detecting circuit) Impedance); determining a current flowing through the wire according to an impedance of the wire and a voltage drop generated by the impedance; determining a quantity of the battery according to a current flowing through the wire.
  • a temperature detecting circuit for detecting a temperature of the battery
  • the battery fuel gauge is connected to the temperature detecting circuit, and the battery fuel gauge is specifically used for Determining an impedance of the wire according to a temperature detected by the temperature detecting circuit and a correspondence between a temperature and an impedance (or resistance) of the wire (ie, determining the wire at a temperature
  • the battery fuel gauge includes the temperature detection circuit.
  • the protection circuit includes: a field effect transistor, the field effect transistor is located in the charge and discharge circuit; and a controller, the controller is connected to the field effect transistor (eg, with a field effect) The gate of the tube) controls conduction and shutdown of the charge and discharge circuit through the field effect transistor.
  • the protection circuit may be a first protection circuit in the battery protection board, and the battery protection board may further include: a second protection circuit, the second protection circuit and the charging The discharge circuits are connected, and the charge and discharge circuits are over-pressed and/or over-current protected by fuses.
  • the mobile terminal supports a normal charging mode and a fast charging mode, wherein the charging speed of the fast charging mode is greater than the charging speed of the normal charging mode.
  • the charging current of the fast charging mode is greater than the charging current of the normal charging mode.
  • the charging voltage of the fast charging mode is greater than the charging voltage of the normal charging mode.
  • the mobile terminal in the fast charging mode, performs two-way communication with an adapter through the charging interface.
  • the battery protection board provided by the present application not only reduces the number of devices in the battery protection board, but also saves the layout area and the cost of the battery protection board, and reduces the temperature of the battery protection board.
  • FIG. 1 is an exemplary diagram of a battery protection board.
  • FIG. 2 is a schematic circuit diagram of a battery protection board according to an embodiment of the present invention.
  • Fig. 3 is a schematic structural view of a battery protection plate according to an embodiment of the present invention.
  • FIG. 4 is a schematic circuit diagram of a battery protection board according to an embodiment of the present invention.
  • Fig. 5 is a schematic circuit diagram of a battery protection board according to an embodiment of the present invention.
  • Fig. 6 is a schematic structural view of a battery according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • FIG. 1 is an exemplary diagram of a battery protection board.
  • the battery protection panel 10 of Figure 1 includes:
  • the protection circuit 11 is connected to the charge and discharge circuit 13 of the battery in the mobile terminal, and the protection circuit 11 is used to control the on and off of the charge and discharge circuit 13;
  • the current detecting resistor 14 is connected in series in the charging and discharging circuit 13;
  • the battery fuel gauge 15 is connected to both ends of the current detecting resistor 14. During the charging and discharging of the battery through the charging and discharging circuit, the battery fuel gauge 15 detects the voltage drop generated by the impedance of the current detecting resistor 14, and according to the The voltage drop determines the battery's charge.
  • the protection circuit 11 of FIG. 1 includes a control IC 16 and a pair of back-to-back MOS transistors T1 and T2, which are connected to the MOS transistor T1 and the MOS transistor T2 through the Cout terminal and the Dout terminal, respectively.
  • the Cout terminal can be an overcharge control terminal that controls the switching of the MOS transistor through the gate voltage of the MOS transistor T2.
  • the Dout terminal can be an over-discharge, over-current, or short-circuit control terminal that controls the switching of the MOS transistor through the gate voltage of the MOS transistor T1.
  • P+ and P- represent the positive and negative electrodes of the battery protection panel 10, respectively.
  • P+ and P- represent the positive and negative electrodes of the battery cell 12 which are taken out through the battery protection plate 10, respectively.
  • the size of mobile terminals is getting smaller and smaller, and the integration requirements for circuits are getting higher and higher.
  • the battery protection board in the scheme not only integrates the protection circuit, but also integrates the battery fuel gauge, and has high integration degree, which is suitable for application inside the mobile terminal and provides protection for the battery of the mobile terminal.
  • the current-sense resistor 14 may be removed and the battery fuel gauge 15 connected to both ends of one or more MOS tubes of the protection circuit 11. That is to say, the current detecting function can be realized by using the resistor Rds of the MOS transistor instead of the current detecting resistor 14, so that the device in the battery protection board 10 can be further reduced.
  • the above embodiment has high reliability requirements for the MOS transistor in the protection circuit 11.
  • the battery fuel gauge 15 and the wire 17 on the battery protection board 10 may be used.
  • the wire 17 may be a section of the battery protection board 10, and the route may be passed through.
  • the copper sheath of the impedance design is connected, that is, the current-sense resistor 14 of FIG. 1 is replaced by the resistance of the wire 17 in the battery protection panel 10. This not only reduces the number of devices in the battery protection board, saves the layout area and the cost of the battery protection board, but also reduces the failure rate of the battery protection board.
  • the battery protection board is generally sealed in the battery together with the battery core. Due to the limited volume of the battery, the area of the battery protection board is relatively small, resulting in poor heat dissipation of the battery protection board.
  • the scheme of FIG. 2 can improve the integration degree of the battery protection board, but limited by the area of the battery protection board, the heat generation of the wire 17 during the current detection process may be relatively large, resulting in a high temperature of the battery protection board.
  • Fig. 3 is a schematic structural view of a battery protection plate according to an embodiment of the present invention.
  • the wire 17 may be located in the first window opening area of FIG. 3.
  • One end of the heat dissipation plate is connected to the first window opening area through an insulating and heat conductive material, and the other end of the heat dissipation plate and the second window opening area of the battery protection board 10 (which may be battery protection)
  • the low temperature regions of the panel 10 are connected, and the heat sink transmits heat from the first windowing region to the second windowing region.
  • the heat sink can be soldered to the second windowed area of the battery protection panel.
  • the material of the heat dissipation plate is copper, that is, the heat dissipation plate may be a heat dissipation copper plate. It should be understood that the specific shape of the heat dissipation plate is not limited in the embodiment of the present invention, and may be adjusted according to the shape of the device around the battery protection board.
  • the insulating thermally conductive material is an insulating thermally conductive silicone.
  • the impedance of the wire 17 in the battery protection panel changes as the temperature of the battery or battery protection panel 10 changes.
  • the temperature detecting circuit 18 may be added to the battery protection plate 10 (as shown in FIG. 4). Show).
  • the battery protection board 10 may further include: a temperature detecting circuit 18 for detecting the temperature of the battery or the battery protection board; the battery fuel gauge 15 may be connected to the temperature detecting circuit 18, and the battery fuel gauge 15 may be specifically configured to: detect according to the temperature The temperature detected by the circuit 18, and the correspondence between the temperature and the impedance of the wire 17 (this correspondence may be stored in advance in the memory of the battery protection panel 10), determines the impedance of the wire 17 at the current temperature; The impedance at temperature detects the current flowing through the wire 17; the amount of electricity of the battery is determined based on the current flowing through the wire 17.
  • a temperature detecting circuit 18 for detecting the temperature of the battery or the battery protection board
  • the battery fuel gauge 15 may be connected to the temperature detecting circuit 18, and the battery fuel gauge 15 may be specifically configured to: detect according to the temperature The temperature detected by the circuit 18, and the correspondence between the temperature and the impedance of the wire 17 (this correspondence may be stored in advance in the memory of the battery protection panel 10), determines the impedance
  • temperature detection circuit 18 can be integrated into battery fuel gauge 15. In some embodiments, temperature detection circuit 18 can be provided separately from battery fuel gauge 15.
  • temperature sensing circuit 18 can detect the temperature through the thermistor.
  • the thermistor may be a Negative Temperature Coefficient (NTC) resistor or a Possitive Temperature Coefficient (PTC) resistor.
  • NTC Negative Temperature Coefficient
  • PTC Possitive Temperature Coefficient
  • one end of the thermistor is connected to the positive pole P+ of the battery protection plate by a pull-up resistor.
  • the protection circuit 11 may be the first protection circuit in the battery protection board 10.
  • the battery protection board 10 may further include:
  • the second protection circuit 21 and the second protection circuit 21 can provide protection for the charging and discharging process of the battery in case of failure of the protection circuit.
  • the second protection circuit 21 can provide overvoltage or overcurrent protection for the charge and discharge process of the battery through the fuse.
  • the second protection circuit 21 may include a first fuse pin F1 and a second fuse pin F2. When an overvoltage or overcurrent occurs in the charge and discharge circuit 13, the second protection circuit 21 is located. The fuse between the first fuse pin F1 and the second fuse pin F2 is blown.
  • the battery protection panel of the embodiment of the present invention has been described in detail above with reference to FIGS. 1 through 5.
  • the battery and the mobile terminal of the embodiment of the present invention will be described in detail below with reference to FIGS. 6 and 7.
  • Fig. 6 is a schematic structural view of a battery according to an embodiment of the present invention.
  • the battery 600 of Figure 6 includes:
  • a battery protection board 620 is connected to the battery core 610.
  • the battery protection board 620 in FIG. 6 can adopt the battery protection board described above, and to avoid repetition, it will not be described in detail herein.
  • FIG. 7 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • Mobile terminal 700 of FIG. include:
  • a battery 600 is connected to the charging interface 710.
  • the mobile terminal 700 can support a normal charging mode and a fast charging mode, wherein the charging speed of the fast charging mode is greater than the charging speed of the normal charging mode.
  • the charging current of the fast charging mode is greater than the charging current of the normal charging mode.
  • the mobile terminal 700 performs bidirectional communication with the adapter through the charging interface 710.
  • the embodiment of the present invention does not specifically limit the communication process between the mobile terminal and the adapter.
  • the communication between the mobile terminal and the adapter may refer to the handshake process of the two parties, that is, the mobile terminal and the adapter determine the charging mode, the charging voltage, and the charging by shaking hands. Current and other parameters.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units 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 units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

一种电池保护板、电池和移动终端，电池保护板（10）包括：导线（17），导线串联在充放电回路（13）中，导线位于电池保护板的第一开窗区域；电池电量计（15），电池电量计与导线两端相连，在电池通过充放电回路进行充放电的过程中，电池电量计检测导线的阻抗产生的压降，并根据压降确定电池的电量；散热板，散热板的一端通过绝缘导热材料与第一开窗区域相连，散热板的另一端与电池保护板的第二开窗区域相连，散热板将第一开窗区域的热量传导至第二开窗区域，其不但能够减少电池保护板中器件的数量，节省布板面积和电池保护板的成本，而且能够降低电池保护板的温度。

Description

电池保护板、电池和移动终端 技术领域
本发明实施例涉及移动终端领域，并且更具体地，涉及一种电池保护板、电池和移动终端。
背景技术
目前，移动终端(如智能手机)越来越受到消费者的青睐，移动终端的安全性成为用户关注的焦点。
为了保证移动终端内部的电池的安全性，需要为电池安装电池保护板。现有的电池保护板的结构多种多样，而移动终端对其电池保护板在集成性、体积方面有特殊的要求，因此，亟需提供一种适于移动终端的电池保护板。
发明内容
本申请提供一种适于移动终端的电池保护板和电池，并提供一种移动终端。
第一方面，提供一种电池保护板，包括：保护电路，与移动终端中的电池的充放电回路相连，所述保护电路用于控制所述充放电回路的导通与关断；导线，所述导线串联在所述充放电回路中，所述导线位于所述电池保护板的第一开窗区域；电池电量计，所述电池电量计与所述导线两端相连，在所述电池通过所述充放电回路进行充放电的过程中，所述电池电量计检测所述导线的阻抗产生的压降，并根据所述压降确定所述电池的电量；散热板，所述散热板的一端通过绝缘导热材料与所述第一开窗区域相连，所述散热板的另一端与所述电池保护板的第二开窗区域相连，所述散热板将所述第一开窗区域的热量传导致所述第二开窗区域。
第二方面，提供一种电池，包括电芯，以及如第一方面描述的电池保护板，所述电池保护板与所述电芯相连。
第三方面，提供一种移动终端，包括充电接口，以及如第二方面描述的电池，所述电池与所述充电接口相连。
在上述某些实现方式中，所述散热板焊接在所述电池保护板的所述第二开窗区域。
在上述某些实现方式中，在所述电池保护板工作的过程中，所述第二开窗区域的产热量低于所述第一开窗区域的产热量。
在上述某些实现方式中，所述散热板的材料为铜。
在上述某些实现方式中，所述绝缘导热材料为绝缘导热硅胶。
在上述某些实现方式中，所述电池保护板还包括：温度检测电路，用于检测所述电池的温度；所述电池电量计与所述温度检测电路相连，所述电池电量计具体用于：根据所述温度检测电路检测到的温度，以及温度与所述导线的阻抗(或电阻)的对应关系，确定所述导线的阻抗(即确定所述导线在温度检测电路检测到的温度下的阻抗)；根据所述导线的阻抗，以及所述阻抗产生的压降，确定流过所述导线的电流；根据流过所述导线的电流，确定所述电池的电量。
在上述某些实现方式中，所述电池电量计包括所述温度检测电路。
在上述某些实现方式中，所述保护电路包括：场效应管，所述场效应管位于所述充放电回路中；控制器，所述控制器与所述场效应管相连(如与场效应管的栅极)，通过所述场效应管控制所述充放电回路的导通与关断。
在上述某些实现方式中，所述保护电路可以是所述电池保护板中的第一保护电路，所述电池保护板还可包括：第二保护电路，所述第二保护电路与所述充放电回路相连，通过熔丝对所述充放电回路进行过压和/或过流保护。
在上述某些实现方式中，所述移动终端支持普通充电模式和快速充电模式，其中，所述快速充电模式的充电速度大于所述普通充电模式的充电速度。
在上述某些实现方式中，所述快速充电模式的充电电流大于所述普通充电模式的充电电流。
在上述某些实现方式中，所述快速充电模式的充电电压大于所述普通充电模式的充电电压。
在上述某些实现方式中，在所述快速充电模式下，所述移动终端通过所述充电接口与适配器进行双向通信。
本申请提供的电池保护板不但能够减少电池保护板中的器件的数量，节省了布板面积和电池保护板的成本，而且降低了电池保护板的温度。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中 所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是电池保护板的示例图。
图2是本发明实施例的电池保护板的示意性电路图。
图3是本发明实施例的电池保护板的示意性结构图。
图4是本发明实施例的电池保护板的示意性电路图。
图5是本发明实施例的电池保护板的示意性电路图。
图6是本发明实施例的电池的示意性结构图。
图7是本发明实施例的移动终端的示意性结构图。
具体实施方式
图1是电池保护板的示例图。图1的电池保护板10包括：
保护电路11，与移动终端中的电池的充放电回路13相连，保护电路11用于控制充放电回路13的导通与关断；
检流电阻14，串联在充放电回路13中；
电池电量计15，电池电量计15与检流电阻14两端相连，在电池通过充放电回路进行充放电的过程中，电池电量计15检测检流电阻14的阻抗产生的压降，并根据该压降确定电池的电量。
在一些实施例中，图1中的保护电路11包括控制IC 16和一对儿背靠背的MOS管T1和T2，控制IC 16分别通过Cout端和Dout端与MOS管T1和MOS管T2相连。
在一些实施例中，Cout端可以是过充控制端，通过MOS管T2栅极电压控制MOS管的开关。
在一些实施例中，Dout端可以是过放、过流或短路控制端，通过MOS管T1栅极电压控制MOS管的开关。
在一些实施例中，P+和P-分别代表电池保护板10的正极和负极。或者，P+和P-分别代表通过电池保护板10接出来的电芯12的正极和负极。
移动终端的体积越来越小，对电路的集成度要求越来越高。该方案中的电池保护板不但集成了保护电路，而且集成了电池电量计，集成度较高，很适合应用在移动终端内部，为移动终端的电池提供保护。
上述方案还存在被进一步提升的可能。为了进一步减少移动终端的体积，可选地，作为一个实施例，可以将检流电阻14去掉，并将电池电量计15连接在保护电路11的一个或多个MOS管的两端。也就是说，可以利用MOS管的电阻Rds代替检流电阻14实现检流功能，这样可以进一步减少电池保护板10中的器件。
上述实施例对保护电路11中的MOS管的可靠性要求较高。
可选地，作为另一个实施例，参见图2，可以将电池电量计15与电池保护板10上的导线17(导线17可以是电池保护板10中的一段走线，该走线可以是经过阻抗设计的铜皮走线)相连，也就是说，通过电池保护板10中的导线17的电阻代替图1中的检流电阻14。这样做不但能够减少电池保护板中的器件的数量，节省布板面积和电池保护板的成本，而且降低了电池保护板的失效率。
现有技术中，电池保护板一般会与电芯一起密封在电池中，由于电池的体积有限，电池保护板的面积会做的比较小，导致电池保护板的散热较差。
采用图2的方案能够提高电池保护板的集成度，但受到电池保护板面积的限制，导线17在检流过程中的发热量可能会比较大，导致电池保护板的温度较高。为了能够降低电池保护板的温度，可以考虑在电池保护板上设置散热板，将导线17产生的热量传导至电池保护板10的其他低温区域。
图3是本发明实施例的电池保护板的示意性结构图。导线17可以位于图3的第一开窗区域，散热板的一端通过绝缘导热材料与第一开窗区域相连，散热板的另一端与电池保护板10的第二开窗区域(可以是电池保护板10的低温区域)相连，散热板将第一开窗区域的热量传导致第二开窗区域。
在一些实施例中，散热板可以焊接在电池保护板的第二开窗区域。
在一些实施例中，散热板的材料为铜，即散热板可以是散热铜板。应理解，本发明实施例对散热板的具体形状不作限定，可以根据电池保护板的周围器件的形状而调整。
在一些实施例中，绝缘导热材料为绝缘导热硅胶。
电池保护板中的导线17的阻抗会随着电池或电池保护板10的温度的改变而改变。在利用导线17代替检流电阻14的情况下，为了能够更加准确地测得流过导线17的电流，在一些实施例中，可以在电池保护板10中加入温度检测电路18(如图4所示)。
具体地，电池保护板10还可包括：温度检测电路18，用于检测电池或电池保护板的温度；电池电量计15可以与温度检测电路18相连，电池电量计15具体可用于：根据温度检测电路18检测到的温度，以及温度与导线17的阻抗的对应关系(该对应关系可以预先存储记录在电池保护板10的存储器中)，确定导线17在当前温度下的阻抗；根据导线17在当前温度下的阻抗，检测流过导线17的电流；根据流过导线17的电流，确定电池的电量。
在一些实施例中，温度检测电路18可以集成在电池电量计15中。在一些实施例中，温度检测电路18可以与电池电量计15分开设置。
在一些实施例中，温度检测电路18可以通过热敏电阻检测温度。在一些实施例中，热敏电阻可以是负温度系数(Negative Temperature Coefficient，NTC)电阻，也可以是正温度系数(Possitive Temperature Coefficient，PTC)电阻。在一些实施例中，热敏电阻的一端通过上拉电阻与电池保护板的正极P+相连。
上述保护电路11可以是电池保护板10中的第一保护电路，为了进一步提高电池保护板的保护性能，可选地，在一些实施例中，参见图5，电池保护板10还可包括：第二保护电路21，第二保护电路21可以在保护电路失效的情况下，为电池的充放电过程提供保护。
在一些实施例中，第二保护电路21可以通过熔丝为电池的充放电过程提供过压或过流保护。如图5所示，第二保护电路21可以包括第一熔丝引脚F1和第二熔丝引脚F2，当充放电回路13出现过压或过流时，第二保护电路21中的位于第一熔丝引脚F1和第二熔丝引脚F2之间的熔丝熔断。
通过设置两级保护电路，进一步提高了移动终端内的电池充放电过程的安全性。
上文结合图1至图5，详细描述了本发明实施例的电池保护板。下文结合图6和图7，详细描述本发明实施例的电池和移动终端。
图6是本发明实施例的电池的示意性结构图。图6的电池600包括：
电芯610；以及
电池保护板620，所述电池保护板620与所述电芯610相连。
应理解，图6中的电池保护板620可以采用上文描述的电池保护板，为避免重复，此处不再详述。
图7是本发明实施例的移动终端的示意性结构图。图7的移动终端700 包括：
充电接口710；
电池600，所述电池600与所述充电接口710相连。
可选地，作为一个实施例，移动终端700可以支持普通充电模式和快速充电模式，其中，快速充电模式的充电速度大于普通充电模式的充电速度。
可选地，作为一个实施例，快速充电模式的充电电流大于普通充电模式的充电电流。
可选地，作为一个实施例，在快速充电模式下，移动终端700通过充电接口710与适配器进行双向通信。
本发明实施例对移动终端与适配器之间的通信过程不作具体限定，例如，移动终端与适配器之间的通信可以指双方的握手过程，即移动终端和适配器通过握手确定充电模式、充电电压、充电电流等参数。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (15)

  1. 一种电池保护板，其特征在于，包括：
    保护电路，与移动终端中的电池的充放电回路相连，所述保护电路用于控制所述充放电回路的导通与关断；
    导线，所述导线串联在所述充放电回路中，所述导线位于所述电池保护板的第一开窗区域；
    电池电量计，所述电池电量计与所述导线两端相连，在所述电池通过所述充放电回路进行充放电的过程中，所述电池电量计检测所述导线的阻抗产生的压降，并根据所述压降确定所述电池的电量；
    散热板，所述散热板的一端通过绝缘导热材料与所述第一开窗区域相连，所述散热板的另一端与所述电池保护板的第二开窗区域相连，所述散热板将所述第一开窗区域的热量传导致所述第二开窗区域。
  2. 如权利要求1所述的电池保护板，其特征在于，所述散热板焊接在所述电池保护板的所述第二开窗区域。
  3. 如权利要求1或2所述的电池保护板，其特征在于，在所述电池保护板工作的过程中，所述第二开窗区域的产热量低于所述第一开窗区域的产热量。
  4. 如权利要求1-3中任一项所述的电池保护板，其特征在于，所述散热板的材料为铜。
  5. 如权利要求1-4中任一项所述的电池保护板，其特征在于，所述绝缘导热材料为绝缘导热硅胶。
  6. 如权利要求1-5中任一项所述的电池保护板，其特征在于，所述电池保护板还包括：
    温度检测电路，用于检测所述电池的温度；
    所述电池电量计与所述温度检测电路相连，所述电池电量计具体用于：
    根据所述温度检测电路检测到的温度，以及温度与所述导线的阻抗的对应关系，确定所述导线的阻抗；
    根据所述导线的阻抗，以及所述阻抗产生的压降，确定流过所述导线的电流；
    根据流过所述导线的电流，确定所述电池的电量。
  7. 如权利要求6所述的电池保护板，其特征在于，所述电池电量计包 括所述温度检测电路。
  8. 如权利要求1-7中任一项所述的电池保护板，其特征在于，所述保护电路包括：
    场效应管，所述场效应管位于所述充放电回路中；
    控制器，所述控制器与所述场效应管相连，通过所述场效应管控制所述充放电回路的导通与关断。
  9. 如权利要求1-8中任一项所述的电池保护板，其特征在于，所述保护电路为所述电池保护板中的第一保护电路，所述电池保护板还包括：
    第二保护电路，所述第二保护电路与所述充放电回路相连，通过熔丝对所述充放电回路进行过压和/或过流保护。
  10. 一种电池，其特征在于，包括：
    电芯；
    如权利要求1-9中任一项所述的电池保护板，所述电池保护板与所述电芯相连。
  11. 一种移动终端，其特征在于，包括：
    充电接口；
    如权利要求10所述的电池，所述电池与所述充电接口相连。
  12. 如权利要求11所述的移动终端，其特征在于，所述移动终端支持普通充电模式和快速充电模式，其中，所述快速充电模式的充电速度大于所述普通充电模式的充电速度。
  13. 如权利要求12所述的移动终端，其特征在于，所述快速充电模式的充电电流大于所述普通充电模式的充电电流。
  14. 如权利要求12所述的移动终端，其特征在于，所述快速充电模式的充电电压大于所述普通充电模式的充电电压。
  15. 如权利要求11-14中任一项所述的移动终端，其特征在于，在所述快速充电模式下，所述移动终端通过所述充电接口与适配器进行双向通信。
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CN112671061A (zh) * 2020-12-15 2021-04-16 维沃移动通信有限公司 电池保护板控制系统及终端
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