WO2018018693A1 - 电池保护电路、电池及移动终端 - Google Patents

电池保护电路、电池及移动终端 Download PDF

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Publication number
WO2018018693A1
WO2018018693A1 PCT/CN2016/097052 CN2016097052W WO2018018693A1 WO 2018018693 A1 WO2018018693 A1 WO 2018018693A1 CN 2016097052 W CN2016097052 W CN 2016097052W WO 2018018693 A1 WO2018018693 A1 WO 2018018693A1
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WIPO (PCT)
Prior art keywords
control module
battery
battery body
effect transistor
field effect
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2016/097052
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English (en)
French (fr)
Inventor
余泽江
庄为元
黄月玲
邓德浪
巫敏华
陈汝宝
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Publication of WO2018018693A1 publication Critical patent/WO2018018693A1/zh
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    • 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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/663—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/685—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries

Definitions

  • the present invention relates to the field of battery protection technologies, and in particular, to a battery protection circuit, a battery, and a mobile terminal.
  • the present invention is based on at least one of the above technical problems, and proposes a new battery protection circuit capable of disconnecting and restoring the connection between the battery and the mobile terminal without disassembling the battery to implement the restart of the mobile terminal.
  • the present invention provides a battery protection circuit including: a voltage collecting circuit, a first end of the voltage collecting circuit is connected to a positive pole of a battery body, and a second end of the voltage collecting circuit is connected to the battery a negative electrode of the body, the voltage collecting circuit is configured to collect voltage information of the battery body; a current collecting circuit, a first end of the current collecting circuit is connected to a negative pole of the battery body, and a second of the current collecting circuit The end is connected to the first regulating device, the current collecting circuit is configured to collect the discharging current information of the battery body; and the first control module is respectively connected to the voltage collecting circuit and the current collecting circuit And the first control device, the first control module is configured to control the first control device to be in an on or off state according to the voltage information of the battery body and the discharge current information of the battery body; When the first regulating device is in an off state, the battery body stops providing a working voltage for the mobile terminal, the first When the controller is in a conducting state, the battery of the mobile body
  • the voltage and the discharge current of the battery body for providing the working voltage to the mobile terminal may be abnormal, so the voltage of the voltage body is collected by setting the voltage collecting circuit.
  • the current collecting circuit is arranged to collect the discharging current of the voltage body, and the first control module determines whether the battery body is powered abnormally according to the voltage and current of the voltage body, thereby determining whether the mobile terminal has an abnormal situation such as a crash, and setting the first regulating device.
  • the battery body stops providing the working voltage for the mobile terminal, and when the first control module controls the first control device to be turned on, the battery body continues to provide the working voltage for the mobile terminal, thereby enabling The battery and the mobile terminal are disconnected and restored without disassembling the battery to implement the restart of the mobile terminal.
  • the first control module when the first control module continuously detects that the voltage of the battery body is less than a preset voltage threshold and the discharge current of the battery body is greater than a predetermined current threshold, the first control module controls the The first regulating device is in an off state, and when the duration in which the first regulating device is in an off state reaches a first duration, the first regulating device is controlled to return to an on state.
  • the first control module continuously detects that the voltage of the battery body is less than a preset voltage threshold (eg, 3.2v, in a predetermined time (eg, the predetermined time is greater than or equal to 60 seconds, specifically may be set according to actual needs) Specifically, it can be set according to actual needs) and the discharge current of the battery body is greater than a predetermined current threshold (for example, 1 mA, which can be set according to actual needs), and the abnormal situation such as a crash of the mobile terminal is determined, and the first control device is controlled at this time.
  • a preset voltage threshold eg, 3.2v, in a predetermined time (eg, the predetermined time is greater than or equal to 60 seconds, specifically may be set according to actual needs)
  • a predetermined current threshold for example, 1 mA, which can be set according to actual needs
  • the battery body stops supplying the working voltage to the mobile terminal, that is, the mobile terminal is powered off, and when the duration of the first regulating device is in the off state reaches the first duration (for example, 5 seconds, which can be set according to actual needs),
  • the first control device is controlled to return to the conductive state, and the battery body continues to provide the working voltage to the mobile terminal, that is, the mobile terminal is powered on again, thereby implementing the restart of the mobile terminal.
  • the first control module further includes a signal detecting end configured to detect whether a low level signal is input, and detecting a low level signal input at the signal detecting end, And the first control module controls the first control device to be in an off state when the duration of the low level signal input is greater than or equal to the second duration, and the duration of the low level signal input is less than the duration
  • the first control module controls the first control device to be in an on state when the second time period or when the signal detection terminal detects that there is a high level signal input.
  • the first control module further includes a signal detecting end, when the signal detecting end detects that there is a low level signal input, and the duration of the low level signal input is greater than or equal to the second duration (eg, 10 seconds, specific
  • the first control module controls the first control device to be in an off state, and the battery body stops providing the working voltage to the mobile terminal, that is, the mobile terminal is powered off, and the duration of the low level signal input is less than
  • the first control device is controlled to be in an on state, and the battery body continues to provide a working voltage for the mobile terminal, that is, the mobile terminal is powered on again, thereby implementing the mobile terminal. Restart.
  • the method further includes: a first thermistor, a first end of the first thermistor being connected to a temperature detecting end of the first control module, the first heat a second end of the varistor is connected to the second regulating device, the first thermistor is configured to collect temperature information of the battery body; the second regulating device is connected to the first The control module and the first regulating device, the first control module controls the first regulating device and the second regulating device to be in an on or off state according to temperature information of the battery body.
  • the related art mainly charges and protects the battery body based on software
  • the battery body is likely to be charged with a large current at a high temperature or a low temperature, and the battery body will rapidly heat up, and then an explosion occurs.
  • the first control module controls the first regulating device and the second regulation according to the temperature information of the battery body.
  • the device is in the on or off state, thereby realizing the charging protection of the battery body on the hardware, effectively avoiding the safety problem caused by the software charging the battery body.
  • the first control module detects that the temperature of the battery body is greater than a first predetermined temperature threshold, controlling the first regulating device and the second regulating device to be cut off. a state, and the first control module detects that the temperature of the battery body is less than a second predetermined temperature threshold, controlling the first regulating device and the second regulating device to be in an on state, wherein the first The predetermined temperature threshold is greater than the second predetermined temperature threshold.
  • the first control module detects that the temperature of the battery body is greater than a first predetermined temperature threshold (eg, 70 ° C, specifically may be set according to actual needs), and controls the first regulating device and the second regulating device.
  • a first predetermined temperature threshold eg, 70 ° C, specifically may be set according to actual needs
  • the charging path of the battery body is cut off to protect the battery body, ensuring the safety of the charging process, preventing the battery body from being accidentally caused by excessive temperature, and detecting the temperature of the battery body when the first control module detects the temperature of the battery body
  • the first predetermined temperature control device and the second control device are controlled to be in an on state to restore the charging path of the battery body and continue to charge the battery body, thereby being less than a second predetermined temperature threshold (eg, 65° C., specifically, may be set according to actual requirements). Does not affect the normal charging process.
  • the first regulating device comprises: a first MOS field effect transistor, a gate of the first MOS field effect transistor is connected to a discharge control end of the first control module a source of the first MOS FET is connected to a second end of the current collecting circuit; a first diode, an anode of the first diode is connected to the first MOS FET a source, a cathode of the first diode is connected to a drain of the first MOS field effect transistor;
  • the second regulation device comprises: a second MOS field effect transistor, the second MOS field effect transistor a gate is connected to the charge control terminal of the first control module, a drain of the second MOS field effect transistor is connected to a drain of the first MOS FET, and a source of the second MOS FET a pole connected to the second end of the first thermistor; a second diode having an anode connected to a source of the second MOS field effect transistor, the second diode A catho
  • the voltage collecting circuit includes: a first resistor, a first end of the first resistor as a first end of the voltage collecting circuit, and a first resistor a second end is connected to the power supply end of the first control module; a first capacitor, a first end of the first capacitor is connected to a second end of the first resistor, and a second end of the first capacitor is used as a The second end of the voltage collecting circuit is connected to the ground end of the first control module.
  • the current collecting circuit includes: a second resistor, a first end of the second resistor serving as a first end of the current collecting circuit, and a second resistor a second end as a second end of the current collecting circuit; a second capacitor, a first end of the second capacitor connected to the first end of the second resistor and a first discharge current detection of the first control module The second end of the second capacitor is coupled to the second end of the second resistor and the second discharge current detection of the first control module.
  • the method further includes: a third resistor, the first end of the third resistor is connected to the anode of the battery body; and the third capacitor is the first end of the third capacitor Connected to the second end of the third resistor and the power supply end of the second control module, the second end of the third capacitor is connected to the negative pole of the battery body; the second control module, the second control a ground terminal of the module is connected to the first end of the current collecting circuit, a chip select end of the second control module is connected to the second end of the current collecting circuit, and a discharging control end of the second control module is connected to a gate of the third MOS field effect transistor, a charge control end of the second control module is connected to a gate of the fourth MOS field effect transistor, and an overcurrent detection end of the second control module is connected to a fourth resistor
  • the first end of the fourth resistor is connected to the first regulating device; the third MOS field effect transistor, the source of the third MOS field effect transistor is connected to the
  • the method further includes: a second thermistor, the first end of the second thermistor being connected to the second end of the first thermistor, the second The thermistor is configured to collect temperature information of the battery body, and output temperature information of the battery body through a second end of the second thermistor; a fifth resistor, the fifth resistor is connected to the first The first end of the second thermistor is configured to collect the identification information of the battery body, and output the identification information of the battery body through the second end of the fifth resistor.
  • a battery comprising: a battery body; and the battery protection circuit according to any one of the preceding claims; wherein the battery protection circuit comprises a second heat
  • the responsive resistor, the fifth resistor, and the first control module in the battery protection circuit include a signal detecting end, and the signal detecting end is used as a control end of the battery for detecting whether there is a low level signal input.
  • a positive electrode of the battery body is used as a positive electrode of the battery
  • a first end of the fifth resistor is used as a negative electrode of the battery
  • a second end of the fifth resistor is used as an identification end of the battery.
  • a mobile terminal comprising: the battery described in the above technical solution.
  • the connection between the battery and the mobile terminal can be disconnected and restored without disassembling the battery, so as to realize the restart of the mobile terminal, and the charging protection of the battery body can be realized from the hardware, thereby effectively avoiding the adoption.
  • FIG. 1 shows a schematic structural view of a battery protection circuit according to an embodiment of the present invention
  • FIG. 2 shows a schematic block diagram of a battery in accordance with an embodiment of the present invention
  • FIG. 3 shows a schematic block diagram of a mobile terminal in accordance with an embodiment of the present invention
  • FIG. 4 is a schematic flow chart showing a control method of a battery protection circuit according to a first embodiment of the present invention
  • FIG. 5 is a schematic flow chart showing a control method of a battery protection circuit according to a second embodiment of the present invention.
  • Fig. 6 is a schematic flow chart showing a control method of a battery protection circuit according to a third embodiment of the present invention.
  • FIG. 1 shows a schematic structural view of a battery protection circuit in accordance with an embodiment of the present invention.
  • a battery protection circuit 100 includes: a voltage collection circuit, a first end of the voltage collection circuit is connected to a positive pole of a battery body 202, and a second end of the voltage collection circuit Connected to the negative pole of the battery body 202, the voltage collecting circuit is configured to collect voltage information of the battery body 202, and a current collecting circuit, the first end of the current collecting circuit is connected to the negative pole of the battery body 202, The second end of the current collecting circuit is connected to the first regulating device, the current collecting circuit is configured to collect the discharging current information of the battery body 202; the first control module 102, the first control module 102 is respectively connected to The voltage collecting circuit, the current collecting circuit, and the first regulating device, the first control module is configured to control the voltage according to the voltage information of the battery body 202 and the discharge current information of the battery body 202.
  • the first regulating device is in an on or off state; wherein, when the first regulating device is in an off state, the battery body 202 stops moving The terminal provides an operating voltage, and the battery body 202 continues to provide an operating voltage to the mobile terminal when the first regulating device is in an on state.
  • the voltage and the discharge current of the battery body for providing the working voltage to the mobile terminal may be abnormal, so the voltage of the voltage body is collected by setting the voltage collecting circuit.
  • the current collecting circuit is arranged to collect the discharging current of the voltage body, and the first control module determines whether the battery body is powered abnormally according to the voltage and current of the voltage body, thereby determining whether the mobile terminal has an abnormal situation such as a crash, and setting the first regulating device.
  • the battery body stops providing the working voltage for the mobile terminal, and when the first control module controls the first control device to be turned on, the battery body continues to provide the working voltage for the mobile terminal, thereby enabling The battery and the mobile terminal are disconnected and restored without disassembling the battery to implement the restart of the mobile terminal.
  • the first control module 102 continuously detects that the voltage of the battery body 202 is less than a preset voltage threshold and the discharge current of the battery body 202 is greater than a predetermined current threshold, And controlling the first regulating device to be in an off state, and controlling the first regulating device to return to a conducting state when a duration of the first regulating device in an off state reaches a first duration.
  • the first control module 102 continuously detects that the battery body 202 is smaller than a preset voltage threshold (eg, 3.2v, for a predetermined time (eg, the predetermined time is greater than or equal to 60 seconds, specifically may be set according to actual requirements) Specifically, the battery can be set according to actual requirements.
  • a preset voltage threshold eg, 3.2v, for a predetermined time (eg, the predetermined time is greater than or equal to 60 seconds, specifically may be set according to actual requirements
  • the battery can be set according to actual requirements.
  • a predetermined current threshold for example, 1 mA, which can be set according to actual requirements
  • the mobile terminal 202 In the off state, the mobile terminal 202 provides a working voltage, that is, the mobile terminal is powered down, and when the duration of the first regulating device is in the off state reaches the first duration (eg, 5 seconds, specifically according to actual needs), the control When the control device returns to the on state, the mobile terminal 202 provides the working voltage, that is, the mobile terminal is powered on again, thereby implementing the restart of the mobile terminal.
  • the duration of the first regulating device is in the off state reaches the first duration (eg, 5 seconds, specifically according to actual needs).
  • the first control module 102 further includes a signal detecting end (such as the PWR end shown in FIG. 1) configured to detect whether there is a low level signal input, where the signal When the detecting end detects that there is a low level signal input, and the duration of the low level signal input is greater than or equal to the second duration, the first control module 102 controls the first regulating device to be in an off state. The first control module 102 controls the first control device to be in an on state when the duration of the low level signal input is less than the second duration or when the signal detection terminal detects that there is a high level signal input. .
  • a signal detecting end such as the PWR end shown in FIG. 1
  • the first control module 102 further includes a signal detecting end, when the signal detecting end detects that there is a low level signal input, and the duration of the low level signal input is greater than or equal to the second duration (eg, 10 seconds, Specifically, when the setting is according to actual requirements, the first control module controls the first control device to be in an off state, and the battery body stops providing a working voltage for the mobile terminal, that is, the mobile terminal is powered off, and the duration of the low level signal input is long.
  • the second duration eg, 10 seconds
  • the first control device When the second time duration is less than when the signal detection terminal detects that there is a high level signal input, the first control device is controlled to be in an on state, and the battery body continues to provide a working voltage for the mobile terminal, that is, the mobile terminal is powered on again, thereby realizing the movement. Restart of the terminal.
  • the method further includes: a first thermistor 104, the first end of the first thermistor 104 is connected to the temperature detecting end of the first control module 102 (as shown in the figure)
  • the first end of the first thermistor 104 is connected to the second regulating device, and the first thermistor 104 is configured to collect temperature information of the battery body 202;
  • a second control device the second control device is connected to the first control module 102 and the first control device, and the first control module 102 controls the first control device according to temperature information of the battery body 202
  • the second regulating device is in an on or off state.
  • the related art mainly charges and protects the battery body based on software
  • the battery body is likely to be charged with a large current at a high temperature or a low temperature, and the battery body will rapidly heat up, and then an explosion occurs.
  • the first control module 102 controls the first regulating device according to the temperature information of the battery body.
  • the second control device is in an on or off state, thereby realizing charging protection of the battery body on the hardware, effectively avoiding the safety problem caused by using the software to charge and protect the battery body.
  • the first control module 102 controls the first regulating device and the second regulating device when detecting that the temperature of the battery body 202 is greater than a first predetermined temperature threshold.
  • the first control module 102 detects that the temperature of the battery body is less than a second predetermined temperature threshold, controlling the first regulating device and the second regulating device to be in an on state, wherein The first predetermined temperature threshold is greater than the second predetermined temperature threshold.
  • the first control module 102 detects that the temperature of the battery body 202 is greater than a first predetermined temperature threshold (eg, 70 ° C, specifically may be set according to actual needs), and controls the first regulating device and the second The regulating device is in an off state, thereby cutting off the charging path of the battery body to charge and protect the battery body, ensuring the safety of the charging process, preventing the battery body from being accidentally caused by the temperature being too high, and when the first control module 102 detects the battery
  • the temperature of the body is less than a second predetermined temperature threshold (for example, 65 ° C, which may be set according to actual requirements), and the first regulating device and the second regulating device are controlled to be in a conducting state to restore the charging path of the battery body, and continue to be the battery body. Charging so as not to affect the normal charging process.
  • a first predetermined temperature threshold eg, 70 ° C, specifically may be set according to actual needs
  • the first regulating device includes: a first MOS field effect transistor 106A, and a gate of the first MOS field effect transistor 106A is connected to the first control module 102.
  • a discharge control terminal (such as the DOUT terminal in the first control module 102 in FIG.
  • a source of the first MOS FET 106A is connected to a second end of the current collecting circuit; a first diode 108A, The anode of the first diode 108A is connected to the source of the first MOS field effect transistor 106A, and the cathode of the first diode 108A is connected to the drain of the first MOS field effect transistor 106A;
  • the second regulation device includes: a second MOS field effect transistor 106B, and a gate of the second MOS field effect transistor 106B is connected to a charging control end of the first control module 102 (such as the first control module in FIG. 1).
  • a drain of the second MOS FET 106B is connected to a drain of the first MOS FET 106A, and a source of the second MOS FET 106B is connected to the a second end of the first thermistor 104; a second diode 108B, the anode of the second diode 108B is connected to the The source of the second MOS field effect transistor 106B, the cathode of the second diode 108B is connected to the drain of the second MOS field effect transistor 106B.
  • the voltage collecting circuit includes: a first resistor 110, a first end of the first resistor 110 serves as a first end of the voltage collecting circuit, and the first resistor
  • the second end of the first capacitor 102 is connected to the power supply end of the first control module 102 (such as the VDD terminal in the first control module 102 in FIG. 1); the first capacitor 112 is connected to the first end of the first capacitor 112. a second end of the first capacitor 112, a second end of the first capacitor 112 serves as a second end of the voltage collecting circuit, and a second end of the first capacitor 112 is connected to the first control module
  • the ground terminal of 102 (such as the VSS terminal in the first control module 102 in FIG. 1).
  • the current collecting circuit includes: a second resistor 114, the first end of the second resistor 114 serves as a first end of the current collecting circuit, and the second resistor a second end of the current collecting circuit is a second end; a second capacitor 116, a first end of the second capacitor 116 is coupled to the first end of the second resistor 114 and the first control module a first discharge current detecting end of 102 (such as the SENSE1 end shown in FIG. 1 ), a second end of the second capacitor 116 is connected to the second end of the second resistor 114 and the first control module 102
  • the second discharge current detecting terminal (the SENSE2 terminal shown in FIG. 1).
  • the method further includes: a third resistor 118, the first end of the third resistor 118 is connected to the anode of the battery body 202; the third capacitor 120, the third capacitor The first end of the second capacitor 120 is connected to the second end of the third resistor 118 and the power supply end of the second control module 122 (such as the VDD terminal in the second control module 122 in FIG. 1). The second end is connected to the negative pole of the battery body 120; the second control module 122, the ground end of the second control module 122 (such as the VSS end in the second control module 122 in FIG.
  • a chip select end of the second control module 122 (such as the CS end in the second control module 122 in FIG. 1) is connected to the second end of the current collecting circuit, the second control
  • the discharge control terminal of the module 122 (such as the DOUT terminal in the second control module 122 in FIG. 1) is connected to the gate of the third MOS FET 106C, and the charging control terminal of the second control module 122 (as shown in FIG. 1)
  • the COUT terminal in the second control module 122 is connected to the gate of the fourth MOS FET 106D
  • the overcurrent detecting end of the second control module 122 (such as the V-end in the second control module 122 in FIG.
  • the third MOS field effect transistor 106C the source of the third MOS field effect transistor 106C is connected to the second end of the current collecting circuit; the third diode 108C, The anode of the third diode 108C is connected to the source of the third MOS field effect transistor 106C, and the cathode of the third diode 108C is connected to the drain of the third MOS field effect transistor 106C;
  • the fourth MOS field effect transistor 106D, the drain of the fourth MOS field effect transistor 106D is connected to the drain of the third MOS field effect transistor 106C, and the source of the fourth MOS field effect transistor 106D is connected to The first regulating device; the fourth diode 108D, the anode of the fourth diode 108D is connected to the source of the fourth MOS field effect transistor 106D, and the cathode of the fourth
  • the method further includes: a second thermistor 126, the first end of the second thermistor 126 is connected to the second end of the first thermistor 104, The second thermistor 126 is configured to collect temperature information of the battery body 202, and output temperature information of the battery body through the second end of the second thermistor 126; a fifth resistor 128, the first The fifth resistor 128 is connected to the first end of the second thermistor 126, and the fifth resistor 128 is configured to collect the identification information of the battery body 202 and output through the second end of the fifth resistor 128.
  • the identification information of the battery body 202 is described.
  • VDD Protect IC2 power input, powered by lithium battery VDD VSS Protect IC2 systematically PWR Protect IC2 enable control signal, active low DOUT Discharge control terminal COUT Charging control terminal SENSE1/SENSE2 Battery discharge current detection terminal TH Thermistor input
  • the second control module 122 and its peripheral circuits are similar to the conventional protection circuit, and can realize overcharge, overdischarge, overcurrent, and short circuit protection of the battery body.
  • the first control module 102 and its peripheral circuits enable the battery and mobile terminal loads to be disconnected for restart when the system is abnormally unable to restart.
  • the first control module 102 and its peripheral circuits have two control modes:
  • Manual control method 1 In order to avoid false triggering, the first control module 102 supports a delay driving mechanism, that is, the PWRON signal is required to continuously input a low level exceeding a second duration (such as 10s), and DOUT will output a low level to control the first A MOS FET is turned off.
  • a delay driving mechanism that is, the PWRON signal is required to continuously input a low level exceeding a second duration (such as 10s), and DOUT will output a low level to control the first A MOS FET is turned off.
  • Automatic control method 2 The SENSE1 and SENSE2 terminals of the first control module 102 are used to detect the discharge current, and the VDD and VSS terminals are used to detect the voltage of the battery body when the voltage of the battery body is lower than a preset voltage threshold (such as 3.2v). And the discharge current is greater than the preset current threshold (such as 1 mA), and the duration of the signal exceeds a predetermined time (such as 60 s), indicating that the mobile terminal is in an abnormal state (such as a crash), then the DOUT terminal outputs a low level to control the first MOS field. The effect tube is cut off. When the first MOS FET is controlled to be in the off state for the first time (eg, 5 s), the DOUT terminal outputs a high level to control the first MOS FET to be in an on state.
  • a preset voltage threshold such as 3.2v
  • the DOUT and COUT terminals of the first control module 102 output a low level.
  • the first preset temperature threshold eg, 70° C.
  • the DOUT and COUT terminals of the first control module 102 output a low level.
  • the first control module 102 controls the first MOS FET to be in an on or off state according to the voltage information of the battery body 202 and the discharge current information of the battery body 202, as shown in FIG.
  • the specific control process includes:
  • Step 402 Detect whether the voltage of the battery body is less than a preset voltage threshold. If yes, go to step 404; otherwise, go to step 410.
  • Step 404 Detect whether the discharge current of the battery body is greater than a predetermined current threshold. If yes, go to step 406; otherwise, go to step 410.
  • Step 406 Determine whether the voltage is less than the preset voltage threshold and the duration of the discharge current greater than the predetermined current threshold exceeds the predetermined duration. If yes, go to step 408; otherwise, go to step 410.
  • Step 408 controlling the first MOS FET to be in an off state for a first duration. Specifically, the DOUT terminal of the first control module 102 outputs a low level to control the first MOS FET to be turned off.
  • Step 410 controlling the first MOS field effect transistor, the second MOS field effect transistor, controlling the third MOS field effect transistor, and the fourth MOS field effect transistor to be turned on.
  • the DOUT terminal of the first control module 102 outputs a high level to control the first MOS FET to be turned on.
  • the first control module 102 further controls the first MOS field effect transistor and the second MOS field effect transistor to be in an on or off state according to the temperature information of the battery body 202.
  • the specific control process includes:
  • Step 502 Detect whether the temperature of the battery body is greater than a first preset temperature threshold. If yes, go to step 504; otherwise, go to step 510.
  • Step 504 controlling the first MOS field effect transistor and the second MOS field effect transistor to be in an off state to cut off the charging and discharging path to the battery body.
  • the DOUT terminal of the first control module 102 outputs a low level to control the first MOS FET to be turned off
  • the COUT terminal of the first control module 102 outputs a low level to control the second MOS FET to be turned off.
  • Step 506 Detect whether the temperature of the battery body is less than a second preset temperature threshold. If yes, go to step 508; otherwise, go back to step 504.
  • Step 508 controlling the first MOS FET and the second MOS FET to be in an on state. Specifically, the DOUT terminal of the first control module 102 outputs a high level to control the first MOS FET to be turned on, and the COUT terminal of the first control module 102 outputs a high level to control the second MOS FET to be turned on.
  • Step 510 controlling the first MOS field effect transistor, the second MOS field effect transistor, controlling the third MOS field effect transistor, and the fourth MOS field effect transistor to be turned on.
  • the first control module 102 further includes a signal detecting end (such as the PWR end shown in FIG. 1) configured to detect whether there is a low level signal input, and a low level signal input is detected at the signal detecting end.
  • a signal detecting end such as the PWR end shown in FIG. 1
  • the first control module 102 controls the first MOS FET to be in an off state, and the duration of the low-level signal input is less than the second duration or the signal.
  • the detecting end detects that there is a high level signal input
  • the first control module 102 controls the first MOS FET to be in an on state.
  • the specific control process includes:
  • Step 602 Detect whether the PWRON signal is low. If yes, go to step 604; otherwise, go to step 610.
  • Step 604 Detect whether the duration of the PWRON signal is low for a second duration. If yes, go to step 606; otherwise, go to step 610.
  • Step 606 Control the first MOS FET to be in an off state. Specifically, the DOUT terminal of the first control module 102 outputs a low level to control the first MOS FET to be turned off.
  • Step 608 detecting whether the PWRON signal is detected to be a high level. If yes, executing step 610; otherwise, returning to step 606.
  • Step 610 controlling the first MOS field effect transistor, the second MOS field effect transistor, controlling the third MOS field effect transistor, and the fourth MOS field effect transistor to be turned on.
  • the DOUT terminal of the first control module 102 outputs a high level to control the first MOS FET to be turned on.
  • the battery and the mobile terminal load can be disconnected without disassembling the battery of the mobile terminal, thereby re-powering the hardware and making the mobile
  • the terminal can work normally, which improves the user experience.
  • FIG. 2 shows a schematic block diagram of a battery in accordance with an embodiment of the present invention.
  • a battery 200 includes: a battery body 202; and a battery protection circuit 100 as shown in FIG. 1; wherein the battery protection circuit 100 includes a second thermistor 126
  • the fifth resistor 128 and the first control module 102 of the battery protection circuit 100 include a signal detecting end, and the signal detecting end is used as a control end of the battery for detecting whether there is a low level signal input.
  • the positive electrode of the battery body 202 is used as the positive electrode of the battery 200
  • the first end of the fifth resistor 128 is used as the negative electrode of the battery 200
  • the second end of the fifth resistor 128 is used as the battery.
  • the identification end of the battery 200 is used to output the identification information of the battery body
  • the second end of the second thermistor 126 is used as a signal output end of the battery 200 for outputting temperature information of the battery body.
  • FIG. 3 shows a schematic block diagram of a mobile terminal in accordance with an embodiment of the present invention.
  • a mobile terminal 300 includes a battery 200 as shown in FIG.
  • the technical solution of the present invention is described in detail above with reference to the accompanying drawings.
  • the technical solution of the present invention proposes a new battery protection circuit capable of disconnecting and restoring the connection between the battery and the mobile terminal without disassembling the battery.
  • the mobile terminal is restarted, and the charging protection of the battery body can be realized from the hardware, thereby effectively avoiding the safety problem caused by using the software to charge and protect the battery body.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
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  • Protection Of Static Devices (AREA)

Abstract

一种电池保护电路（100）、电池（200）及移动终端（300），电池保护电路（100）包括：电压采集电路，电压采集电路的第一端连接至电池本体（202）的正极，电压采集电路的第二端连接至电池本体（202）的负极，电压采集电路用于采集电池本体（202）的电压信息；电流采集电路，电流采集电路的第一端连接至电池本体（202）的负极，电流采集电路的第二端连接至第一调控器件，电流采集电路用于采集电池本体（202）的放电电流信息；第一控制模块（102），分别连接至电压采集电路、电流采集电路以及第一调控器件，第一控制模块（102）用于根据电池本体（202）的电压信息以及电池本体（202）的放电电流信息，控制第一调控器件处于导通或截止状态。

Description

电池保护电路、电池及移动终端 技术领域
本发明涉及电池保护技术领域，具体而言，涉及一种电池保护电路、一种电池和一种移动终端。
背景技术
随着移动终端系统的复杂化，系统出现异常（如死机）情况越来越多，且很多终端设备在长按开机键后并不能实现重启，因为系统已经处于非正常运行状态，惟一能实现重启方法是断开电池后重新接上电池上电，对于一些电池可拆卸的移动终端，用户可通过手动拆卸再安装，操作繁琐，而对于电池不可拆卸的移动终端（如手机与平板），一旦出现系统异常（如死机），那么移动终端将一直无法开机。
因此，如何在不拆卸电池的情况下实现移动终端的重启成为亟待解决的技术问题。
发明内容
本发明正是基于上述技术问题至少之一，提出了一种新的电池保护电路，能够在不拆卸电池的情况下，断开和恢复电池和移动终端的连接，以实现移动终端的重启。
有鉴于此，本发明提出了一种电池保护电路，包括：电压采集电路，所述电压采集电路的第一端连接至电池本体的正极，所述电压采集电路的第二端连接至所述电池本体的负极，所述电压采集电路用于采集所述电池本体的电压信息；电流采集电路，所述电流采集电路的第一端连接至所述电池本体的负极，所述电流采集电路的第二端连接至第一调控器件，所述电流采集电路用于采集所述电池本体的放电电流信息；第一控制模块，所述第一控制模块分别连接至所述电压采集电路、所述电流采集电路以及所述第一调控器件，所述第一控制模块设置为根据所述电池本体的电压信息以及所述电池本体的放电电流信息，控制所述第一调控器件处于导通或截止状态；其中，所述第一调控器件处于截止状态时，所述电池本体停止为移动终端提供工作电压，所述第一调控器件处于导通状态时，所述电池本体继续为所述移动终端提供工作电压。
在该技术方案中，在移动终端出现异常（如死机等）时，用于为移动终端提供工作电压的电池本体的电压以及放电电流都会发生异常，所以通过设置电压采集电路来采集电压本体的电压，设置电流采集电路来采集电压本体的放电电流，并由第一控制模块根据电压本体的电压以及电流确定电池本体是否供电异常，从而确定移动终端是否出现死机等异常情况，并设置第一调控器件，在第一控制模块控制第一调控器件截止时，电池本体停止为移动终端提供工作电压，在第一控制模块控制第一调控器件导通时，电池本体继续为移动终端提供工作电压，从而能够在不拆卸电池的情况下，断开和恢复电池和移动终端的连接，以实现移动终端的重启。
在上述技术方案中，优选地，所述第一控制模块在预定时间内持续检测到所述电池本体的电压小于预设电压阈值且所述电池本体的放电电流大于预定电流阈值时，控制所述第一调控器件处于截止状态，以及在所述第一调控器件处于截止状态的时长到达第一时长时，控制所述第一调控器件恢复至导通状态。
在该技术方案中，若第一控制模块在预定时间（如预定时间大于或等于60秒，具体可根据实际需求来设置）内持续检测到电池本体的电压小于预设电压阈值（如3.2v，具体可根据实际需求来设置）且电池本体的放电电流大于预定电流阈值（如1毫安，具体可根据实际需求来设置）时，确定移动终端出现死机等异常情况，此时控制第一调控器件处于截止状态，电池本体停止为移动终端提供工作电压，即移动终端掉电，并在第一调控器件处于截止状态的时长到达第一时长（如5秒，具体可根据实际需求来设置）时，控制第一调控器件恢复至导通状态，电池本体继续为移动终端提供工作电压，即移动终端重新上电，从而实现移动终端的重启。
在上述任一项技术方案中，优选地，所述第一控制模块还包括设置为检测是否有低电平信号输入的信号检测端，在所述信号检测端检测到有低电平信号输入，且所述低电平信号输入的持续时长大于或等于第二时长时，所述第一控制模块控制所述第一调控器件处于截止状态，在所述低电平信号输入的持续时长小于所述第二时长或在所述信号检测端检测到有高电平信号输入时，所述第一控制模块控制所述第一调控器件处于导通状态。
在该技术方案中，第一控制模块还包括信号检测端，当信号检测端检测到有低电平信号输入，且低电平信号输入的持续时长大于或等于第二时长（如10秒，具体可根据实际需求来设置）时，此时第一控制模块控制第一调控器件处于截止状态，电池本体停止为移动终端提供工作电压，即移动终端掉电，在低电平信号输入的持续时长小于第二时长或在信号检测端检测到有高电平信号输入时，再控制第一调控器件处于导通状态，电池本体继续为移动终端提供工作电压，即移动终端重新上电，从而实现移动终端的重启。
在上述任一项技术方案中，优选地，还包括：第一热敏电阻，所述第一热敏电阻的第一端连接至所述第一控制模块的温度检测端，所述第一热敏电阻的第二端连接至第二调控器件，所述第一热敏电阻用于采集所述电池本体的温度信息；所述第二调控器件，所述第二调控器件连接至所述第一控制模块以及所述第一调控器件，所述第一控制模块根据所述电池本体的温度信息控制所述第一调控器件和所述第二调控器件处于导通或截止状态。
在该技术方案中，考虑到相关技术中主要基于软件对电池本体进行充电保护，一旦软件出现异常，电池本体很可能在高温或低温中进行大电流充电，电池本体会急剧升温，进而发生爆炸，甚至威胁用户人身安全，所以通过设置第一热敏电阻来检测电池本体的温度信息，并设置第二调控器件，由第一控制模块根据电池本体的温度信息，控制第一调控器件和第二调控器件处于导通或截止状态，从而在硬件上实现对电池本体的充电保护，有效地规避了采用软件对电池本体进行充电保护所引发的安全问题。
在上述任一项技术方案中，优选地，所述第一控制模块检测到所述电池本体的温度大于第一预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于截止状态，以及所述第一控制模块检测到所述电池本体的温度小于第二预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于导通状态，其中，所述第一预定温度阈值大于所述第二预定温度阈值。
在该技术方案中，第一控制模块检测到所述电池本体的温度大于第一预定温度阈值（如70℃，具体可根据实际需求来设置），控制第一调控器件和所述第二调控器件处于截止状态，从而切断电池本体的充电通路，以对电池本体进行充电保护，确保了充电过程的安全性，防止电池本体因温度过高而发生意外，当第一控制模块检测到电池本体的温度小于第二预定温度阈值（如65℃，具体可根据实际需求来设置），控制第一调控器件和第二调控器件处于导通状态，以恢复电池本体的充电通路，继续为电池本体充电，从而不影响正常充电过程。
在上述任一项技术方案中，优选地，所述第一调控器件包括：第一MOS场效应管，所述第一MOS场效应管的栅极连接至所述第一控制模块的放电控制端，所述第一MOS场效应管的源极连接至所述电流采集电路的第二端；第一二极管，所述第一二极管的阳极连接至所述第一MOS场效应管的源极，所述第一二极管的阴极连接至所述第一MOS场效应管的漏极；所述第二调控器件包括：第二MOS场效应管，所述第二MOS场效应管的栅极连接至所述第一控制模块的充电控制端，所述第二MOS场效应管的漏极连接至所述第一MOS场效应管的漏极，所述第二MOS场效应管的源极连接至所述第一热敏电阻的第二端；第二二极管，所述第二二极管的阳极连接至所述第二MOS场效应管的源极，所述第二二极管的阴极连接至所述第二MOS场效应管的漏极。其中，MOS（Metal-Oxide-Semiconductor，金属-氧化物-半导体）场效应管。
在上述任一项技术方案中，优选地，所述电压采集电路包括：第一电阻，所述第一电阻的第一端作为所述电压采集电路的第一端，所述第一电阻的第二端连接至所述第一控制模块的供电端；第一电容，所述第一电容的第一端连接至所述第一电阻的第二端，所述第一电容的第二端作为所述电压采集电路的第二端，所述第一电容的第二端连接至所述第一控制模块的接地端。
在上述任一项技术方案中，优选地，所述电流采集电路包括：第二电阻，所述第二电阻的第一端作为所述电流采集电路的第一端，所述第二电阻的第二端作为所述电流采集电路的第二端；第二电容，所述第二电容的第一端连接至所述第二电阻的第一端以及所述第一控制模块的第一放电电流检测端，所述第二电容的第二端连接至所述第二电阻的第二端以及所述第一控制模块的第二放电电流检测。
在上述任一项技术方案中，优选地，还包括：第三电阻，所述第三电阻的第一端连接至所述电池本体的正极；第三电容，所述第三电容的第一端连接至所述第三电阻的第二端以及第二控制模块的供电端，所述第三电容的第二端连接至所述电池本体的负极；所述第二控制模块，所述第二控制模块的接地端连接至所述电流采集电路的第一端，所述第二控制模块的片选端连接至所述电流采集电路的第二端，所述第二控制模块的放电控制端连接至第三MOS场效应管的栅极，所述第二控制模块的充电控制端连接至所述第四MOS场效应管的栅极，所述第二控制模块的过流检测端连接至第四电阻的第一端，所述第四电阻的第二端连接至所述第一调控器件；所述第三MOS场效应管，所述第三MOS场效应管的源极连接至所述电流采集电路的第二端；第三二极管，所述第三二极管的阳极连接至所述第三MOS场效应管的源极，所述第三二极管的阴极连接至所述第三MOS场效应管的漏极；所述第四MOS场效应管，所述第四MOS场效应管的漏极连接至所述第三MOS场效应管的漏极，所述第四MOS场效应管的源极连接至所述第一调控器件；第四二极管，所述第四二极管的阳极连接至所述第四MOS场效应管的源极，所述第四二极管的阴极连接至所述第四MOS场效应管的漏极以及所述第一调控器件。
在上述任一项技术方案中，优选地，还包括：第二热敏电阻，所述第二热敏电阻的第一端连接至所述第一热敏电阻的第二端，所述第二热敏电阻用于采集所述电池本体的温度信息，并通过所述第二热敏电阻的第二端输出所述电池本体的温度信息；第五电阻，所述第五电阻连接至所述第二热敏电阻的第一端，所述第五电阻用于采集所述电池本体的标识信息，并通过所述第五电阻的第二端输出所述电池本体的标识信息。
根据本发明的第二方面的实施例，提出了一种电池，包括：电池本体；以及如上述技术方案中任一项所述的电池保护电路；其中，在所述电池保护电路包括第二热敏电阻、第五电阻以及所述电池保护电路中的第一控制模块包括信号检测端的情况下，将所述信号检测端作为所述电池的控制端，用于检测是否有低电平信号输入，将所述电池本体的正极作为所述电池的正极，将所述第五电阻的第一端作为所述电池的负极，所述第五电阻的第二端作为所述电池的标识端，用于输出所述电池本体的标识信息，将所述第二热敏电阻的第二端作为所述电池的信号输出端，用于输出所述电池本体的温度信息。
根据本发明的第三方面的实施例，提出了一种移动终端，包括：上述技术方案中所述的电池。
通过以上技术方案，能够在不拆卸电池的情况下，断开和恢复电池和移动终端的连接，以实现移动终端的重启，并能够从硬件上实现对电池本体的充电保护，有效地规避了采用软件对电池本体进行充电保护所引发的安全问题。
 附图说明
图1示出了根据本发明的实施例的电池保护电路的结构示意图；
图2示出了根据本发明的实施例的电池的示意框图；
图3示出了根据本发明的实施例的移动终端的示意框图；
图4示出了根据本发明的第一个实施例的电池保护电路的控制方法的示意流程图；
图5示出了根据本发明的第二个实施例的电池保护电路的控制方法的示意流程图；
图6示出了根据本发明的第三个实施例的电池保护电路的控制方法的示意流程图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的实施例的电池保护电路的结构示意图。
如图1所示，根据本发明的实施例的电池保护电路100，包括：电压采集电路，所述电压采集电路的第一端连接至电池本体202的正极，所述电压采集电路的第二端连接至所述电池本体202的负极，所述电压采集电路用于采集所述电池本体202的电压信息；电流采集电路，所述电流采集电路的第一端连接至所述电池本体202的负极，所述电流采集电路的第二端连接至第一调控器件，所述电流采集电路用于采集所述电池本体202的放电电流信息；第一控制模块102，所述第一控制模块102分别连接至所述电压采集电路、所述电流采集电路以及所述第一调控器件，所述第一控制模块设置为根据所述电池本体202的电压信息以及所述电池本体202的放电电流信息，控制所述第一调控器件处于导通或截止状态；其中，所述第一调控器件处于截止状态时，所述电池本体202停止为移动终端提供工作电压，所述第一调控器件处于导通状态时，所述电池本体202继续为所述移动终端提供工作电压。
在该技术方案中，在移动终端出现异常（如死机等）时，用于为移动终端提供工作电压的电池本体的电压以及放电电流都会发生异常，所以通过设置电压采集电路来采集电压本体的电压，设置电流采集电路来采集电压本体的放电电流，并由第一控制模块根据电压本体的电压以及电流确定电池本体是否供电异常，从而确定移动终端是否出现死机等异常情况，并设置第一调控器件，在第一控制模块控制第一调控器件截止时，电池本体停止为移动终端提供工作电压，在第一控制模块控制第一调控器件导通时，电池本体继续为移动终端提供工作电压，从而能够在不拆卸电池的情况下，断开和恢复电池和移动终端的连接，以实现移动终端的重启。
在上述技术方案中，优选地，所述第一控制模块102在预定时间内持续检测到所述电池本体202的电压小于预设电压阈值且所述电池本体202的放电电流大于预定电流阈值时，控制所述第一调控器件处于截止状态，以及在所述第一调控器件处于截止状态的时长到达第一时长时，控制所述第一调控器件恢复至导通状态。
在该技术方案中，若第一控制模块102在预定时间（如预定时间大于或等于60秒，具体可根据实际需求来设置）内持续检测到电池本体202小于预设电压阈值（如3.2v，具体可根据实际需求来设置）且电池本体202电流大于预定电流阈值（如1毫安，具体可根据实际需求来设置）时，确定移动终端出现死机等异常情况，此时控制第一调控器件处于截止状态，电池本体202移动终端提供工作电压，即移动终端掉电，并在第一调控器件处于截止状态的时长到达第一时长（如5秒，具体可根据实际需求来设置）时，控制第一调控器件恢复至导通状态，电池本体202移动终端提供工作电压，即移动终端重新上电，从而实现移动终端的重启。
在上述任一项技术方案中，优选地，所述第一控制模块102还包括设置为检测是否有低电平信号输入的信号检测端（如图1所示的PWR端），在所述信号检测端检测到有低电平信号输入，且所述低电平信号输入的持续时长大于或等于第二时长时，所述第一控制模块102控制所述第一调控器件处于截止状态，在所述低电平信号输入的持续时长小于所述第二时长或在所述信号检测端检测到有高电平信号输入时，所述第一控制模块102控制所述第一调控器件处于导通状态。
在该技术方案中，第一控制模块102还包括信号检测端，当信号检测端检测到有低电平信号输入，且低电平信号输入的持续时长大于或等于第二时长（如10秒，具体可根据实际需求来设置）时，此时第一控制模块控制第一调控器件处于截止状态，电池本体停止为移动终端提供工作电压，即移动终端掉电，在低电平信号输入的持续时长小于第二时长或在信号检测端检测到有高电平信号输入时，再控制第一调控器件处于导通状态，电池本体继续为移动终端提供工作电压，即移动终端重新上电，从而实现移动终端的重启。
在上述任一项技术方案中，优选地，还包括：第一热敏电阻104，所述第一热敏电阻104的第一端连接至所述第一控制模块102的温度检测端（如图1所示的TH端），所述第一热敏电阻104的第二端连接至第二调控器件，所述第一热敏电阻104用于采集所述电池本体202的温度信息；所述第二调控器件，所述第二调控器件连接至所述第一控制模块102以及所述第一调控器件，所述第一控制模块102根据所述电池本体202的温度信息控制所述第一调控器件和所述第二调控器件处于导通或截止状态。
在该技术方案中，考虑到相关技术中主要基于软件对电池本体进行充电保护，一旦软件出现异常，电池本体很可能在高温或低温中进行大电流充电，电池本体会急剧升温，进而发生爆炸，甚至威胁用户人身安全，所以通过设置第一热敏电阻104来检测电池本体的温度信息，并设置第二调控器件，由第一控制模块102根据电池本体的温度信息，控制第一调控器件和第二调控器件处于导通或截止状态，从而在硬件上实现对电池本体的充电保护，有效地规避了采用软件对电池本体进行充电保护所引发的安全问题。
在上述任一项技术方案中，优选地，所述第一控制模块102检测到所述电池本体202的温度大于第一预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于截止状态，以及所述第一控制模块102检测到所述电池本体的温度小于第二预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于导通状态，其中，所述第一预定温度阈值大于所述第二预定温度阈值。
在该技术方案中，第一控制模块102检测到所述电池本体202的温度大于第一预定温度阈值（如70℃，具体可根据实际需求来设置），控制第一调控器件和所述第二调控器件处于截止状态，从而切断电池本体的充电通路，以对电池本体进行充电保护，确保了充电过程的安全性，防止电池本体因温度过高而发生意外，当第一控制模块102检测到电池本体的温度小于第二预定温度阈值（如65℃，具体可根据实际需求来设置），控制第一调控器件和第二调控器件处于导通状态，以恢复电池本体的充电通路，继续为电池本体充电，从而不影响正常充电过程。
在上述任一项技术方案中，优选地，所述第一调控器件包括：第一MOS场效应管106A，所述第一MOS场效应管106A的栅极连接至所述第一控制模块102的放电控制端（如图1中第一控制模块102中的DOUT端），所述第一MOS场效应管106A的源极连接至所述电流采集电路的第二端；第一二极管108A，所述第一二极管108A的阳极连接至所述第一MOS场效应管106A的源极，所述第一二极管108A的阴极连接至所述第一MOS场效应管106A的漏极；所述第二调控器件包括：第二MOS场效应管106B，所述第二MOS场效应管106B的栅极连接至所述第一控制模块102的充电控制端（如图1中第一控制模块102中的COUT端），所述第二MOS场效应管106B的漏极连接至所述第一MOS场效应管106A的漏极，所述第二MOS场效应管106B的源极连接至所述第一热敏电阻104的第二端；第二二极管108B，所述第二二极管108B的阳极连接至所述第二MOS场效应管106B的源极，所述第二二极管108B的阴极连接至所述第二MOS场效应管106B的漏极。
在上述任一项技术方案中，优选地，所述电压采集电路包括：第一电阻110，所述第一电阻110的第一端作为所述电压采集电路的第一端，所述第一电阻110的第二端连接至所述第一控制模块102的供电端（如图1中第一控制模块102中的VDD端）；第一电容112，所述第一电容112的第一端连接至所述第一电阻110的第二端，所述第一电容112的第二端作为所述电压采集电路的第二端，所述第一电容112的第二端连接至所述第一控制模块102的接地端（如图1中第一控制模块102中的VSS端）。
在上述任一项技术方案中，优选地，所述电流采集电路包括：第二电阻114，所述第二电阻114的第一端作为所述电流采集电路的第一端，所述第二电阻114的第二端作为所述电流采集电路的第二端；第二电容116，所述第二电容116的第一端连接至所述第二电阻114的第一端以及所述第一控制模块102的第一放电电流检测端（如图1所示的SENSE1端），所述第二电容116的第二端连接至所述第二电阻114的第二端以及所述第一控制模块102的第二放电电流检测端（如图1所示的SENSE2端）。
在上述任一项技术方案中，优选地，还包括：第三电阻118，所述第三电阻118的第一端连接至所述电池本体202的正极；第三电容120，所述第三电容120的第一端连接至所述第三电阻118的第二端以及第二控制模块122的供电端（如图1中第二控制模块122中的VDD端），所述第三电容120的第二端连接至所述电池本体120的负极；所述第二控制模块122，所述第二控制模块122的接地端（如图1中第二控制模块122中的VSS端）连接至所述电流采集电路的第一端，所述第二控制模块122的片选端（如图1中第二控制模块122中的CS端）连接至所述电流采集电路的第二端，所述第二控制模块122的放电控制端（如图1中第二控制模块122中的DOUT端）连接至第三MOS场效应管106C的栅极，所述第二控制模块122的充电控制端（如图1中第二控制模块122中的COUT端）连接至所述第四MOS场效应管106D的栅极，所述第二控制模块122的过流检测端（如图1中第二控制模块122中的V-端）连接至第四电阻124的第一端，所述第四电阻124的第二端连接至所述第一调控器件；所述第三MOS场效应管106C，所述第三MOS场效应管106C的源极连接至所述电流采集电路的第二端；第三二极管108C，所述第三二极管108C的阳极连接至所述第三MOS场效应管106C的源极，所述第三二极管108C的阴极连接至所述第三MOS场效应管106C的漏极；所述第四MOS场效应管106D，所述第四MOS场效应管106D的漏极连接至所述第三MOS场效应管106C的漏极，所述第四MOS场效应管106D的源极连接至所述第一调控器件；第四二极管108D，所述第四二极管108D的阳极连接至所述第四MOS场效应管106D的源极，所述第四二极管108D的阴极连接至所述第四MOS场效应管106D的漏极以及所述第一调控器件。
在上述任一项技术方案中，优选地，还包括：第二热敏电阻126，所述第二热敏电阻126的第一端连接至所述第一热敏电阻104的第二端，所述第二热敏电阻126用于采集所述电池本体202的温度信息，并通过所述第二热敏电阻126的第二端输出所述电池本体的温度信息；第五电阻128，所述第五电阻128连接至所述第二热敏电阻126的第一端，所述第五电阻128用于采集所述电池本体202的标识信息，并通过所述第五电阻128的第二端输出所述电池本体202的标识信息。
在上述实施例中，第一控制模块102中各个端的信息功能说明如表1所示：
名称 功能说明
VDD 保护IC2供电输入，由锂电芯VDD供电
VSS 保护IC2系统地
PWR 保护IC2使能控制信号，低电平有效
DOUT 放电控制端
COUT 充电控制端
SENSE1/SENSE2 电池放电电流检测端
TH 热敏电阻输入端
表1
在上述实施例中，第二控制模块122以及其外围电路和传统的保护电路类似，能够实现对电池本体的过充、过放、过流、短路保护。
第一控制模块102以及其外围电路能够实现在系统出现异常无法重启的时候，断开电池和移动终端负载以实现重启。第一控制模块102以及其外围电路有两种控制方式：
手动控制方法 1：为避免误触发，第一控制模块102支持延时驱动机制，即要求PWRON信号持续输入超过第二时长（如10s）的低电平，DOUT才会输出低电平以控制第一MOS场效应管截止。
自动控制方法2：第一控制模块102的SENSE1与SENSE2端用于检测放电电流，其VDD与VSS端用于检测电池本体的电压，当电池本体的电压低于预设电压阈值（如3.2v）且放电电流大于预设电流阈值（如1mA），且此信号持续时间超过预定时间（如60s），说明移动终端处于异常状态（如死机），则DOUT端输出低电平，控制第一MOS场效应管截止，当控制第一MOS场效应管处于截止状态持续第一时长（如5s）后，DOUT端便会输出高电平，控制第一MOS场效应管处于导通状态。
此外，第一控制模块102通过第一热敏电阻104检测到电池本体的温度高于第一预设温度阈值（如70℃）时，第一控制模块102的DOUT与COUT端输出低电平，控制第一MOS场效应管和第二MOS场效应管处于截止状态；当电池本体的温度低于预设温度阈值（如65℃）时，控制第一MOS场效应管和第二MOS场效应管处于截止状态，使得充电更加安全可靠，避免电池因温度过高，发生意外。
在上述实施例中，第一控制模块102根据所述电池本体202的电压信息以及所述电池本体202的放电电流信息，控制第一MOS场效应管处于导通或截止状态，如图4所示，具体的控制过程包括：
步骤402，检测电池本体的电压是否小于预设电压阈值，若是，执行步骤404；否则，执行步骤410。
步骤404，检测电池本体的放电电流是否大于预定电流阈值，若是，执行步骤406；否则，执行步骤410。
步骤406，判断电压小于预设电压阈值且放电电流大于预定电流阈值的持续时长是否均超过预定时长，若是，执行步骤408；否则执行步骤410。
步骤408，控制第一MOS场效应管处于截止状态持续第一时长。具体地，第一控制模块102的DOUT端输出低电平控制第一MOS场效应管截止。
步骤410，控制第一MOS场效应管、第二MOS场效应管、控制第三MOS场效应管、第四MOS场效应管导通。具体地，第一控制模块102的DOUT端输出高电平控制第一MOS场效应管导通。
在上述实施例中，第一控制模块102还根据电池本体202的温度信息控制第一MOS场效应管和第二MOS场效应管处于导通或截止状态。如图5所示，具体的控制过程包括：
步骤502，检测电池本体的温度是否大于第一预设温度阈值，若是，执行步骤504；否则，执行步骤510。
步骤504，控制第一MOS场效应管和第二MOS场效应管处于截止状态，以切断对电池本体的充放电通路。具体地，第一控制模块102的DOUT端输出低电平控制第一MOS场效应管截止，第一控制模块102的COUT端输出低电平控制第二MOS场效应管截止。
步骤506，检测电池本体的温度是否小于第二预设温度阈值，若是，执行步骤508；否则，返回执行步骤504。
步骤508，控制第一MOS场效应管和第二MOS场效应管处于导通状态。具体地，第一控制模块102的DOUT端输出高电平控制第一MOS场效应管导通，第一控制模块102的COUT端输出高电平控制第二MOS场效应管导通。
步骤510，控制第一MOS场效应管、第二MOS场效应管、控制第三MOS场效应管、第四MOS场效应管导通。
在上述实施例中，第一控制模块102还包括设置为检测是否有低电平信号输入的信号检测端（如图1所示的PWR端），在信号检测端检测到有低电平信号输入，且低电平信号输入的持续时长大于或等于第二时长时，第一控制模块102控制第一MOS场效应管处于截止状态，在低电平信号输入的持续时长小于第二时长或在信号检测端检测到有高电平信号输入时，第一控制模块102控制第一MOS场效应管处于导通状态，如图6所示，具体的控制过程包括：
步骤602，检测PWRON信号是否为低电平，若是，执行步骤604；否则，执行步骤610。
步骤604，检测PWRON信号为低电平的持续时长是否超过第二时长，若是，执行步骤606；否则，执行步骤610。
步骤606， 控制第一MOS场效应管处于截止状态。具体地，第一控制模块102的DOUT端输出低电平控制第一MOS场效应管截止。
步骤608，检测检测PWRON信号是否为高电平，若是，执行步骤610；否则，返回执行步骤606。
步骤610，控制第一MOS场效应管、第二MOS场效应管、控制第三MOS场效应管、第四MOS场效应管导通。具体地，第一控制模块102的DOUT端输出高电平控制第一MOS场效应管导通。
在上述实施例中，对于内置电池的移动终端，在系统出现异常且无法重启时，不需要拆卸移动终端的电池，即可将电池和移动终端负载断开，从而让硬件重新上电，使得移动终端可以正常工作，提升了用户的使用体验。
图2示出了根据本发明的实施例的电池的示意框图。
如图2所示，根据本发明的实施例的电池200，包括：电池本体202；以及如图1所示的电池保护电路100；其中，在所述电池保护电路100包括第二热敏电阻126、第五电阻128以及所述电池保护电路100中的第一控制模块102包括信号检测端的情况下，将所述信号检测端作为所述电池的控制端，用于检测是否有低电平信号输入，将所述电池本体202的正极作为所述电池200的正极，将所述第五电阻128的第一端作为所述电池200的负极，所述第五电阻128的第二端作为所述电池200的标识端，用于输出所述电池本体的标识信息，将所述第二热敏电阻126的第二端作为所述电池200的信号输出端，用于输出所述电池本体的温度信息。
图3示出了根据本发明的实施例的移动终端的示意框图。
如图3所示，根据本发明的实施例的移动终端300，包括如图2所示的电池200。
以上结合附图详细说明了本发明的技术方案，本发明的技术方案提出了一种新的电池保护电路，能够在不拆卸电池的情况下，断开和恢复电池和移动终端的连接，以实现移动终端的重启，并能够从硬件上实现对电池本体的充电保护，有效地规避了采用软件对电池本体进行充电保护所引发的安全问题。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (12)

  1. 一种电池保护电路，其特征在于，包括：
    电压采集电路，所述电压采集电路的第一端连接至电池本体的正极，所述电压采集电路的第二端连接至所述电池本体的负极，所述电压采集电路用于采集所述电池本体的电压信息；
    电流采集电路，所述电流采集电路的第一端连接至所述电池本体的负极，所述电流采集电路的第二端连接至第一调控器件，所述电流采集电路用于采集所述电池本体的放电电流信息；
    第一控制模块，所述第一控制模块分别连接至所述电压采集电路、所述电流采集电路以及所述第一调控器件，所述第一控制模块设置为根据所述电池本体的电压信息以及所述电池本体的放电电流信息，控制所述第一调控器件处于导通或截止状态；
    其中，所述第一调控器件处于截止状态时，所述电池本体停止为移动终端提供工作电压，所述第一调控器件处于导通状态时，所述电池本体继续为所述移动终端提供工作电压。
  2. 根据权利要求1所述的电池保护电路，其特征在于，所述第一控制模块在预定时间内持续检测到所述电池本体的电压小于预设电压阈值且所述电池本体的放电电流大于预定电流阈值时，控制所述第一调控器件处于截止状态，以及在所述第一调控器件处于截止状态的时长到达第一时长时，控制所述第一调控器件恢复至导通状态。
  3. 根据权利要求1所述的电池保护电路，其特征在于，所述第一控制模块还包括设置为检测是否有低电平信号输入的信号检测端，在所述信号检测端检测到有低电平信号输入，且所述低电平信号输入的持续时长大于或等于第二时长时，所述第一控制模块控制所述第一调控器件处于截止状态，在所述低电平信号输入的持续时长小于所述第二时长或在所述信号检测端检测到有高电平信号输入时，所述第一控制模块控制所述第一调控器件处于导通状态。
  4. 根据权利要求1所述的电池保护电路，其特征在于，还包括：
    第一热敏电阻，所述第一热敏电阻的第一端连接至所述第一控制模块的温度检测端，所述第一热敏电阻的第二端连接至第二调控器件，所述第一热敏电阻用于采集所述电池本体的温度信息；
    所述第二调控器件，所述第二调控器件连接至所述第一控制模块以及所述第一调控器件，所述第一控制模块根据所述电池本体的温度信息控制所述第一调控器件和所述第二调控器件处于导通或截止状态。
  5. 根据权利要求4所述的电池保护电路，其特征在于，所述第一控制模块检测到所述电池本体的温度大于第一预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于截止状态，以及所述第一控制模块检测到所述电池本体的温度小于第二预定温度阈值时，控制所述第一调控器件和所述第二调控器件处于导通状态，其中，所述第一预定温度阈值大于所述第二预定温度阈值。
  6. 根据权利要求4所述的电池保护电路，其特征在于，
    所述第一调控器件包括：
    第一MOS场效应管，所述第一MOS场效应管的栅极连接至所述第一控制模块的放电控制端，所述第一MOS场效应管的源极连接至所述电流采集电路的第二端；
    第一二极管，所述第一二极管的阳极连接至所述第一MOS场效应管的源极，所述第一二极管的阴极连接至所述第一MOS场效应管的漏极；
    所述第二调控器件包括：
    第二MOS场效应管，所述第二MOS场效应管的栅极连接至所述第一控制模块的充电控制端，所述第二MOS场效应管的漏极连接至所述第一MOS场效应管的漏极，所述第二MOS场效应管的源极连接至所述第一热敏电阻的第二端；
    第二二极管，所述第二二极管的阳极连接至所述第二MOS场效应管的源极，所述第二二极管的阴极连接至所述第二MOS场效应管的漏极。
  7. 根据权利要求1所述的电池保护电路，其特征在于，所述电压采集电路包括：
    第一电阻，所述第一电阻的第一端作为所述电压采集电路的第一端，所述第一电阻的第二端连接至所述第一控制模块的供电端；
    第一电容，所述第一电容的第一端连接至所述第一电阻的第二端，所述第一电容的第二端作为所述电压采集电路的第二端，所述第一电容的第二端连接至所述第一控制模块的接地端。
  8. 根据权利要求1所述的电池保护电路，其特征在于，所述电流采集电路包括：
    第二电阻，所述第二电阻的第一端作为所述电流采集电路的第一端，所述第二电阻的第二端作为所述电流采集电路的第二端；
    第二电容，所述第二电容的第一端连接至所述第二电阻的第一端以及所述第一控制模块的第一放电电流检测端，所述第二电容的第二端连接至所述第二电阻的第二端以及所述第一控制模块的第二放电电流检测端。
  9. 根据权利要求1至8中任一项所述的电池保护电路，其特征在于，还包括：
    第三电阻，所述第三电阻的第一端连接至所述电池本体的正极；
    第三电容，所述第三电容的第一端连接至所述第三电阻的第二端以及第二控制模块的供电端，所述第三电容的第二端连接至所述电池本体的负极；
    所述第二控制模块，所述第二控制模块的接地端连接至所述电流采集电路的第一端，所述第二控制模块的片选端连接至所述电流采集电路的第二端，所述第二控制模块的放电控制端连接至第三MOS场效应管的栅极，所述第二控制模块的充电控制端连接至所述第四MOS场效应管的栅极，所述第二控制模块的过流检测端连接至第四电阻的第一端，所述第四电阻的第二端连接至所述第一调控器件；
    所述第三MOS场效应管，所述第三MOS场效应管的源极连接至所述电流采集电路的第二端；
    第三二极管，所述第三二极管的阳极连接至所述第三MOS场效应管的源极，所述第三二极管的阴极连接至所述第三MOS场效应管的漏极；
    所述第四MOS场效应管，所述第四MOS场效应管的漏极连接至所述第三MOS场效应管的漏极，所述第四MOS场效应管的源极连接至所述第一调控器件；
    第四二极管，所述第四二极管的阳极连接至所述第四MOS场效应管的源极，所述第四二极管的阴极连接至所述第四MOS场效应管的漏极以及所述第一调控器件。
  10. 根据权利要求4至8中任一项所述的电池保护电路，其特征在于，还包括：
    第二热敏电阻，所述第二热敏电阻的第一端连接至所述第一热敏电阻的第二端，所述第二热敏电阻用于采集所述电池本体的温度信息，并通过所述第二热敏电阻的第二端输出所述电池本体的温度信息；
    第五电阻，所述第五电阻连接至所述第二热敏电阻的第一端，所述第五电阻用于采集所述电池本体的标识信息，并通过所述第五电阻的第二端输出所述电池本体的标识信息。
  11. 一种电池，其特征在于，包括：
    电池本体；以及如根据权利要求1至10中任一项所述的电池保护电路；
    其中，在所述电池保护电路包括第二热敏电阻、第五电阻以及所述电池保护电路中的第一控制模块包括信号检测端的情况下，将所述信号检测端作为所述电池的控制端，用于检测是否有低电平信号输入，将所述电池本体的正极作为所述电池的正极，将所述第五电阻的第一端作为所述电池的负极，所述第五电阻的第二端作为所述电池的标识端，用于输出所述电池本体的标识信息，将所述第二热敏电阻的第二端作为所述电池的信号输出端，用于输出所述电池本体的温度信息。
  12. 一种移动终端，其特征在于，包括：如权利要求11所述的电池。
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