CN112490522A

CN112490522A - Battery protection module and method, battery and mobile terminal

Info

Publication number: CN112490522A
Application number: CN201910866207.XA
Authority: CN
Inventors: 曾耀亿; 陈仁杰; 姜登; 王宗强
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2021-03-12

Abstract

The disclosure relates to a battery protection module and method, a battery and a mobile terminal. The method comprises the following steps: the detection assembly is used for detecting a controlled loop where the battery is located to obtain a detection signal value; the first control component is connected with the detection component and used for sending a heating signal to the heating component when the detection signal value is determined to be higher than a safety threshold value; a temperature sensitive component in the controlled loop, the temperature sensitive component having an impedance that increases with an increase in ambient temperature, wherein the temperature sensitive component having an impedance threshold above is used to bring the battery into a protective state of charge or discharge; and the heating component is connected with the first control component and used for entering a heating state according to the heating signal and improving the ambient temperature within the range of the thermosensitive component. Through this battery protection module, reduced the impedance of whole battery and promoted the protection precision to the battery, in addition, still reduced the hardware cost and reduced the battery volume.

Description

Battery protection module and method, battery and mobile terminal

Technical Field

The disclosure relates to the technical field of batteries, in particular to a battery protection module and method, a battery and a mobile terminal.

Background

The battery has safety problems during the use process, and the battery needs to pass relevant regulations of safety regulation LPS (limit Power Source). Therefore, the battery may be protected and a battery protection plate may be mounted on the battery to ensure safe use of the battery and pass safety regulations.

One way is that: the battery is protected by a protection Integrated Circuit (IC) module and a thermistor (PTC), and the method has a problem of limited application range, thereby affecting the protection accuracy.

The other mode is as follows: the battery protection board manufactured by adopting the method has the problems of high cost and large occupied space due to the adoption of the double-protection IC module.

Disclosure of Invention

The disclosure provides a battery protection module and method, a battery and a mobile terminal.

According to a first aspect of the embodiments of the present disclosure, there is provided a battery protection module including:

the detection assembly is used for detecting a controlled loop where the battery is located to obtain a detection signal value;

the first control component is connected with the detection component and used for sending a heating signal to the heating component when the detection signal value is determined to be higher than a safety threshold value;

a temperature sensitive component in the controlled loop, the temperature sensitive component having an impedance that increases with an increase in ambient temperature, wherein the temperature sensitive component having an impedance threshold above is used to bring the battery into a protective state of charge or discharge;

and the heating component is connected with the first control component and used for entering a heating state according to the heating signal and improving the ambient temperature within the range of the thermosensitive component.

According to a second aspect of the embodiments of the present disclosure, there is provided a battery protection method including:

detecting a controlled loop where the battery is located based on a detection assembly to obtain a detection signal value;

when the detection signal value is determined to be higher than a safety threshold value, sending a heating signal to a heating component;

controlling the heating component to enter a heating state according to the heating signal so as to improve the ambient temperature in the range of the thermosensitive component; wherein the temperature sensitive component has an increased impedance with an increase in ambient temperature;

the battery is brought into a protective state of charge or discharge with the heat sensitive component having an impedance above a threshold.

According to a third aspect of embodiments of the present disclosure, there is provided a battery including:

an electric core;

the battery core is connected with the battery protection module of the first aspect.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a mobile terminal including:

an interface, wherein the interface comprises: a charging interface and/or a discharging interface;

a battery connected to the interface, the battery according to the third aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in an embodiment of the present disclosure, upon determining that the detection signal value is above the safety threshold, a heating signal is sent to the heating component to cause the heat sensitive component to form a high impedance to open the controlled loop, thereby achieving protection of the battery. In the scheme, the heating of the thermosensitive assembly is controlled through the external heating assembly, rather than the temperature rise of the environment where the thermosensitive assembly is located due to the increase of the current of the controlled loop, so that the impedance of the thermosensitive assembly is improved; when the current or the voltage in the controlled loop has a small change, the impedance of the thermosensitive assembly has a relatively obvious edge, so that the sensitivity of the thermosensitive assembly is improved by actively controlling the heating of the heating assembly, and the sensitivity of safety protection in the charging and discharging of the battery is improved. Compared with a scheme based on a thermistor and an integrated circuit, the method has the characteristics of high sensitivity of safety protection and better safety effect of battery protection. Compared with a scheme of protecting by using two chips, the single chip can be used for protecting the same safety, the hardware cost is reduced, and the size of the battery is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a first battery protection module device according to an embodiment of the present disclosure.

Fig. 2 is a diagram of a battery protection module apparatus according to an embodiment of the disclosure.

Fig. 3 is a circuit diagram of a PCB of the battery protection module according to the embodiment of the present disclosure.

Fig. 4 is a third diagram of a battery protection module apparatus according to an embodiment of the disclosure.

Fig. 5 is a first circuit diagram of a battery protection module.

Fig. 6 is a circuit diagram of a battery protection module.

Fig. 7 is an exemplary circuit diagram of a battery protection module in an embodiment of the disclosure.

Fig. 8 is a flowchart illustrating a method for protecting a battery according to an embodiment of the disclosure.

Fig. 9 is a flowchart illustrating a battery protection method according to an embodiment of the disclosure.

Fig. 10 is a schematic structural view of a battery shown in an embodiment of the present disclosure.

Fig. 11 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure.

Fig. 12 is a block diagram illustrating a mobile terminal apparatus according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Fig. 1 is a first battery protection module device shown in the embodiment of the present disclosure, and as shown in fig. 1, a battery protection module 100 includes:

and the detection component 101 is used for detecting the controlled loop where the battery is located to obtain a detection signal value.

And the first control component 102 is connected with the detection component and is used for sending a heating signal to the heating component when the detection signal value is determined to be higher than the safety threshold value.

And the heating component 103 is connected with the first control component and used for entering a heating state according to the heating signal and increasing the ambient temperature within the range of the thermosensitive component.

And a heat sensitive component 104, located in the controlled loop, the resistance of which increases as the ambient temperature increases, wherein the heat sensitive component having a resistance threshold above is used to bring the battery into a charging or discharging protection state.

In the embodiment of the present disclosure, the battery protection module 100 is a battery protection board, and the battery protection is implemented by controlling a charging or discharging process of the battery through a controlled loop connected to the battery. The battery may be applied to a mobile terminal including a mobile phone, a notebook, and a tablet computer, and the embodiments of the disclosure are not limited thereto.

The detection component 101 is used for detecting a controlled loop where the battery is located to obtain a detection signal value, so that the first control component 102 of the battery protection module can control according to the detection signal value.

In one embodiment, the detection component 101 includes at least one of:

a current detection component 101a for detecting the current value of the controlled loop;

a voltage detection component 101b for detecting the voltage value of the controlled loop;

and the temperature detection component 101c is used for detecting the temperature value of the battery.

That is, in the embodiment of the present disclosure, the overcurrent protection can be implemented by detecting the current value of the controlled loop through the current detection component 101a in the battery protection module 100; the voltage value of the controlled loop can be detected by the voltage detection component 101b to realize overvoltage protection or over-low voltage protection; the temperature value of the battery can be detected by the temperature detection component 101c to realize over-temperature protection.

In another embodiment, the detection component 101 may further detect a temperature change rate of the battery, a current change rate, a voltage change rate, and the like in the controlled loop, so that the first control component 102 can determine whether the working state of the battery is stable according to the change rate by detecting the change rate, thereby further improving the protection accuracy of the battery.

Of course, the detecting component 101 of the battery protection module 100 may also include a plurality of signal value detecting components, and it can be understood that a comprehensive and precise protection of the battery can be achieved by detecting a plurality of signal values and performing a comprehensive judgment.

In the embodiment of the present disclosure, the first control component 102 is connected to the detection component 101, and when the first control component 102 determines that the detection signal value is higher than the safety threshold, the heat generating component 103 is sent a heat generating signal. That is, when the first control unit 102 determines that there is a risk of charging or discharging the battery based on the detection signal value and the safety threshold, it transmits a heat generation signal to the heat generation unit 103, and the heat generation signal has a function of heating the heat generation unit 103. The risks in the charging or discharging process of the battery include risks of burning, explosion and the like.

In one implementation, the battery protection module 100 further includes a first switch assembly 102a, and the first switch assembly 102a is connected to the first control assembly 102; and the first control component 102 is configured to control the first switch component 102a to be turned on when it is determined that the detection signal value is higher than the safety threshold, and send a heating signal to the heating component 103 by using the turned-on first switch component 102 a.

It will be appreciated that by adding the first switch assembly 102a, flexible control may be achieved. When the first control component 102 determines that the detection signal value does not exceed the safety threshold, the first switch component 102a can be controlled to be turned off to control the heating component 103 not to heat, so that the ineffective device loss and the circuit overhead are reduced.

In the embodiment of the present disclosure, the ambient temperature is raised by the heat of the heat generating component 103, and as the ambient temperature rises, the heat sensitive component 104 generates heat, the impedance rises, and when the raised impedance is higher than the impedance threshold, that is, the heat sensitive component 104 forms a high impedance, the high impedance of the heat sensitive component 104 will greatly reduce the charging and discharging current of the controlled loop, so that the controlled charging/discharging loop is disconnected, thereby the battery enters a charging or discharging protection state.

It is understood that in the implementation of the present disclosure, the impedance of the thermosensitive component 104 is affected by the heat generation of the heat generating component 103 to control the controlled loop, and on one hand, the heat generating component 103 can quickly make the thermosensitive component 104 form a high impedance to open the controlled loop, so that the thermosensitive component with smaller impedance can be selected to reduce the impedance of the whole battery; on the other hand, the mode of controlling the impedance of the thermal sensitive component 104 through the external heating component 103 enlarges the protection range of the battery based on the thermal sensitive component 104, and improves the protection precision of the battery.

Illustratively, the heat generating component 103 is a heater, and the heat sensitive component 104 is a positive temperature coefficient thermistor, i.e., a PTC. On the one hand, the PTC has a resistance of 1k Ω, i.e. a high resistance is formed, while when the current of the controlled loop is only 5A, it is likely that the PTC itself has a resistance of 800 Ω to reach 1k Ω at a current of 5A. By heating with the heater, the PTC element may reach a high resistance quickly even at 500 Ω. On the other hand, the PTC needs 7-9A of current to form high resistance, but only 5A of current actually exists, and the PTC cannot reach the high resistance to realize the protection of the battery.

In one embodiment, the first control assembly 102 may be a battery fuel gauge.

The battery coulometer is an original control chip in the battery and is used for analyzing a corresponding inflow or outflow detection signal value in a controlled charging or discharging loop to obtain the electric quantity of the battery so as to manage the charging and discharging processes. For example, the detection signal value is a current value. In addition, in the embodiment of the disclosure, the battery fuel gauge can further realize the protection of the battery according to the voltage value and/or the temperature according to the voltage value obtained by the connected voltage detection component and the temperature obtained by the temperature detection component.

Fig. 2 is a second diagram of a battery protection module device according to an embodiment of the disclosure, and as shown in fig. 2, on the basis of the battery protection module 100 shown in fig. 1, the battery protection module 100 may further include:

and the adjusting component 105 is positioned in the controlled loop and used for adjusting the heating power of the heating component.

For example, the adjusting component 105 may be a variable resistor, or may be a circuit module with an electrical signal adjusting function formed by combining a plurality of components, and the embodiment of the present disclosure is not limited.

It can be understood that, in the embodiment of the present disclosure, the adjusting component 105 adjusts the heating power of the heating component 103 to adjust the impedance of the heat sensitive component 104, so as to realize modularity of the battery protection module, that is, to make the battery protection module 100 have universality for different batteries and mobile terminals.

In one embodiment, the thermosensitive element 104 and the heat generating element 103 in the battery protection module 100 are disposed on a Printed Circuit Board (PCB), and the PCB includes:

a first layer, the metal attached on a first side of the first layer being a heat generating component 103;

and a second layer positioned on a second side of the first layer, wherein the thermosensitive component 104 is positioned on the second layer, and the first layer and the second layer are isolated from the heating component 103.

In this embodiment, the first layer may be a base layer of the PCB and the second layer may be an insulating layer of the PCB.

In one embodiment, the distance between the temperature sensitive component 104 and the first layer is between 0.1mm and 0.2 mm.

In this embodiment, the temperature sensitive member 104 is in close proximity to the first layer, thereby facilitating heating of the temperature sensitive member 104 by heat generated by the metal attached to the first layer.

In the disclosed embodiment, if the first layer is a base layer and the second layer is an insulating layer, the insulating layer is between the base layer and the heat sensitive component, and the base layer and the heat sensitive component 104 are adjacent PCB inner layers.

In one embodiment, the first layer is covered with a copper foil conductor; and/or the second layer is made of epoxy resin.

The copper foil conductor of the first layer can generate heat, and the epoxy resin layer of the second layer can be insulated and protected.

For example, fig. 3 is a circuit structure diagram of a PCB of the battery protection module 100 in an embodiment of the disclosure, and as shown in fig. 3, a copper foil layer 2 is attached to an upper surface of a first layer of a printed circuit board assembly, and a heat generating function of the heat generating component 103 is realized through the copper foil layer 2. Below the first layer is a second layer, epoxy 4, corresponding to the insulating layer of the PCB. On the lower surface of the second layer, a thermistor element 1 is embedded. Meanwhile, as shown in fig. 3, the copper foil layer 2 is connected to a power supply and also connected to an external resistor R1, the R1 may be a variable resistor, and the R1 is connected to a battery fuel gauge through a switch Q1. The battery gauge is the first control assembly 102, R1 is the regulating assembly 105, and the switch Q1 is the first switch assembly 102 a.

In the PCB circuit structure diagram, the resistance of the variable resistor R1 can adjust the heating power of the PCB copper foil layer 2, the distance between the embedded PTC1 and the copper foil layer 2 is 0.1 mm-0.2 mm, and the heat of the copper foil layer 2 can be directly conducted to the embedded thermistor 1 through the design, so that the battery is protected.

Fig. 1 to 2 illustrate a manner in which the battery protection module according to the embodiment of the disclosure controls the heating element 103 to heat the thermal sensing element 104 based on the first control element 102 to protect the battery. For better protection, in the embodiment of the present disclosure, the battery protection module 100 may also have a dual protection function.

Fig. 4 is a third diagram illustrating a battery protection module device according to an embodiment of the disclosure, and as shown in fig. 4, on the basis of the battery protection module 100 shown in fig. 1 to 2, the battery protection module 100 may further include:

a second switching assembly 106 located in the controlled loop;

and the second control component 107 is connected with the detection component 101 and is used for controlling the second switch component 106 to be switched off when the detection signal is determined to be higher than the safety threshold value.

In this embodiment, the battery protection module 100 protects the battery by combining the second control component 107 and the second switch component 106.

If the protection module in fig. 1 or fig. 2 is referred to as a first protection branch, in fig. 3, the battery protection module 100 further includes a second protection branch, and the protection manner of the second protection branch is different from that of the first protection branch.

In the conventional technology, the implementation of dual overcurrent protection for a battery includes two schemes, fig. 5 is a circuit diagram of a battery protection module, as shown in fig. 5, a positive electrode P + of the battery protection module is connected with a positive electrode of a battery cell in the battery, and a negative electrode P-of the battery protection module is connected with a negative electrode of the battery cell in the battery. The Circuit structure of the battery protection module comprises a battery fuel gauge (5), a first protection branch of the battery protection module comprises a protection Integrated Circuit (IC) (2), a current detection precision resistor (3) and a loop field effect tube switch (4), wherein one end of the protection IC is grounded, the other end of the protection IC is connected with two loop field effect tubes, one field effect tube is connected with an overcharge end of the protection IC (2), and the other field effect tube is connected with an overdischarge end of the protection IC (2). When the protection IC (2) detects the overcharge or overdischarge current through the current detection precision resistor (3), the control closes the loop field effect transistor switch (4) to complete the first protection. Meanwhile, the battery protection board also comprises a second protection circuit, the second protection circuit comprises a PTC element (1), one end of the PTC element (1) is connected with a power supply, and the other end of the PTC element is connected with the positive pole P + of the battery protection board. When the overcurrent continuously occurs, the PTC element (1) in the second protection circuit increases due to the overcurrent power consumption, the impedance becomes extremely high, and a high impedance is formed to shut off the charge and discharge circuit to complete the second protection action.

Fig. 6 is a circuit diagram of a battery protection module, as shown in fig. 6, a protection module (3) is added to the second solution with respect to fig. 5. As shown in fig. 6, the positive electrode P + of the battery protection module is connected to the positive electrode of the cell in the battery, and the negative electrode P-is connected to the negative electrode of the cell in the battery. The circuit structure of the battery protection module comprises a battery fuel gauge (7), a first protection branch of the battery protection module comprises a protection IC1(4), the protection IC1(4) detects discharge current through a current detection resistor (1), and when overcurrent is detected, the field effect transistor module (6) is closed to complete first overcurrent protection. After protection, if the overcurrent continues to occur, the protection circuit module (3) is used to perform a protection action, and when the protection IC2(3) in the second protection branch of the protection circuit module (3) detects the overcurrent through the second current detection resistor (2), the field effect transistor module (5) is turned off to complete the second overcurrent protection action.

In this embodiment, taking fig. 7 as an example, fig. 7 is an example circuit diagram of a battery protection module in an embodiment of the present disclosure, as shown in fig. 6, a positive electrode P + of the battery protection module is connected to a positive electrode of a battery cell in the battery, and a negative electrode P-of the battery protection module is connected to a negative electrode of the battery cell in the battery. The first protection branch of the battery protection module comprises a battery electricity meter (6), a switch (4), a variable resistor (3), a heater (2) and a thermistor (1). When the battery electricity meter (6) detects overcharge or overdischarge current through the precision resistor (5), the switch (4) is turned on to send a heating signal, at the moment, the first protection branch circuit adjusts the heating power of the heater (2) through the variable resistor (3) so that the thermistor (1) adjacent to the heater (2) is heated, when the thermistor (1) is heated to form high impedance, a charging or discharging loop is turned off, and the battery protection module realizes the protection of the battery through the first protection branch circuit. Meanwhile, the second protection branch of the battery protection module comprises a protection Integrated Circuit (IC) (7), a current detection precision resistor (5) and a loop field effect transistor switch (8), wherein the protection IC is connected with the current detection precision resistor (5) and the loop field effect transistor (8). One field effect transistor is connected with the overcharge end of the protection IC, and the other field effect transistor is connected with the overdischarge end of the protection IC. When the protection IC detects the over-charge or over-discharge current through the current detection precision resistor (5), the control closes the loop field effect transistor switch (8) to realize the second protection.

In this embodiment, the precision resistor (5) is the detection element 101, the battery fuel gauge (6) is the first control element 102, the heater (2) is the heating element 103, the thermistor (1) is the thermistor element 104, the switch (4) is the first switch element 102a, the field effect transistor (8) is the second switch element 106, and the protection IC (7) is the second control element 107.

It can be understood that, in the first solution, the resistance of the thermistor is used for heating, and the resistance value of the PTC needs to be set relatively large to ensure that the PTC can be heated quickly to form a high-resistance open circuit at a certain current value. Therefore, when the PTC element is heated by its own resistance, the accuracy of the overcurrent protection is not high, and the protection operation current is often too large to be selected for use. For example, the application is 5A current, the PTC action current may be 7-9A, and thus the protection specification is exceeded, or the charging power consumption is larger and larger at present and exceeds the PTC application range, and only a small part of battery protection is adapted. In the second scheme, a group of circuit protection modules is added, namely a protection IC2, a precision resistor (2) and a field effect transistor module (5) are added. Therefore, the design cost and the design space are increased, and the user experience is influenced under the requirement that the current mobile terminal tends to be lighter and thinner. The design mode of FIG. 7 is adopted, the mode that the thermistor is heated by the heater is controlled by the existing battery fuel gauge in the battery protection module, the impedance of the whole battery is reduced, the protection precision of the battery is improved, and in addition, the hardware cost is reduced and the battery size is reduced.

Fig. 8 is a flowchart illustrating a battery protection method according to an embodiment of the disclosure, where as shown in fig. 8, the method includes:

and S11, detecting the controlled loop where the battery is located based on the detection assembly to obtain a detection signal value.

And S12, when the detection signal value is determined to be higher than the safety threshold value, sending a heating signal to the heating component.

S13, controlling the heating component to enter a heating state according to the heating signal so as to improve the ambient temperature in the range of the thermosensitive component; wherein the resistance of the heat sensitive component increases with increasing ambient temperature.

And S14, utilizing the thermosensitive assembly with the impedance higher than the threshold value, and enabling the battery to enter a charging or discharging protection state.

In one embodiment, the battery protection module may further include an adjustment component, and the battery protection module may adjust the heating power of the heat generating component through the adjustment component.

In this embodiment, the heating power of the heat generating component is adjusted by the adjusting component to achieve adjustment of the impedance of the heat sensitive component.

In one embodiment, the detection component detects a controlled loop in which the battery is located, and the obtained detection signal value includes at least one of the following values: the current value, the voltage value of the controlled loop and the temperature value of the battery.

In another embodiment, the detection signal values may further include a current change rate, a voltage change rate, a battery change rate, and the like of the controlled loop.

In the embodiment of the disclosure, overcurrent protection is realized by detecting the current value of the controlled loop; overvoltage or over-low voltage protection is realized by detecting a voltage value; and the over-temperature protection is realized by detecting the temperature value of the battery. And through detecting any plurality of signal values, the battery can be comprehensively protected.

In another embodiment, the battery protection module further includes a second control component, and the battery protection module can realize dual protection through the second control component, including: and when the second control component determines that the detection signal value is higher than the safety threshold value, the field effect transistor in the controlled circuit is controlled to be disconnected, so that the charging or discharging of the battery through the controlled loop is stopped.

In the embodiment of the disclosure, the battery protection module has dual protection capability, thereby improving the safety of battery protection.

In the following, the overcurrent protection is taken as an example, the battery protection module in the battery adopts a thermistor control mode, the battery fuel gauge detects whether overcurrent exists through the precision resistor, and the thermistor forms high impedance through the heater under the overcurrent condition so as to cut off the controlled loop, thereby realizing the overcurrent protection.

Corresponding to fig. 7, fig. 9 is a flowchart illustrating a battery protection method according to an embodiment of the disclosure, and as shown in fig. 9, the battery protection method includes the following steps:

and S21, the battery protection board starts to perform over-discharge current protection.

In this embodiment, the battery protection plate is a battery protection module.

S22, the battery fuel gauge detects the charging and discharging current value through the precision resistor.

In this embodiment, the precision resistor refers to a resistor whose resistance error, thermal stability (temperature coefficient) of the resistor, distribution parameters (distributed capacitance and distributed inductance) of the resistor, and other indexes all meet a certain standard.

The charging and discharging current is detected through the precision resistor, and the accuracy of the detection result is guaranteed.

S23, the battery fuel gauge judges whether the charging and discharging current is larger than the preset current maximum value, if yes, the step S24 is executed.

In this embodiment, the preset maximum current value is the safety threshold.

And S24, the battery fuel gauge sends a protection signal to the PTC control module.

In this embodiment, the PTC control module includes a first switch component, i.e., a switch (4) and a heater (2) in fig. 6, and a heat generating component, the protection signal, i.e., a heat generating signal, and the battery fuel gauge transmits the protection signal through the switch (4).

And S25, a switch in the PTC control module is turned on, and the heater heats.

S26, the heater heat transfers to the thermistor, and the thermistor forms a high impedance.

In this embodiment, the heater changes the ambient temperature in which the thermistor is located after heating. The resistance of the thermistor increases with an increase in the ambient temperature, reaching a high resistance.

And S27, forming high impedance after the thermistor is heated, and disconnecting the loop to realize overcurrent protection.

In this embodiment, when the impedance of the thermistor is higher than the impedance threshold, the controlled loop is disconnected, and the battery is stopped from being charged or discharged through the controlled loop, thereby implementing overcurrent protection

Fig. 10 is a schematic structural view of a battery shown in an embodiment of the present disclosure. The battery 200 of fig. 10 includes:

an electric core 201;

the battery protection module 100, electric core 201 are connected with the battery protection module 100.

Fig. 11 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure. The mobile terminal 300 of fig. 11 includes:

an interface 301, wherein the interface 301 comprises: a charging interface and/or a discharging interface;

the battery 200, the battery 200 and the interface 301 are connected.

Fig. 12 is a block diagram illustrating a mobile terminal apparatus 800 according to an example embodiment. For example, the device 800 may be a mobile phone, a mobile computer, etc.

Referring to fig. 12, the apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of the components, such as a display and keypad of the apparatus 800, the sensor assembly 814 may also detect a change in position of the apparatus 800 or a component of the apparatus 800, the presence or absence of user contact with the apparatus 800, orientation or acceleration/deceleration of the apparatus 800, and a change in temperature of the apparatus 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A battery protection module, comprising:

2. The battery protection module of claim 1, further comprising:

and the adjusting component is positioned in the controlled loop and used for adjusting the heating power of the heating component.

3. The battery protection module of claim 1, wherein the detection component comprises at least one of:

the current detection component is used for detecting the current value of the controlled loop;

the voltage detection component is used for detecting the voltage value of the controlled loop;

and the temperature detection assembly is used for detecting the temperature value of the battery.

4. The battery protection module of claim 1, further comprising:

the first switch assembly is connected with the first control assembly;

and the first control component is used for controlling the first switch component to be conducted when the detection signal value is determined to be higher than the safety threshold value, and sending the heating signal to the heating component by utilizing the conducted first switch component.

5. The battery protection module of claim 4, wherein the first control component is a battery fuel gauge.

6. The battery protection module according to any one of claims 1 to 5, further comprising:

a second switching assembly located in the controlled loop;

and the second control component is connected with the detection component and used for controlling the second switch component to be switched off when the detection signal is determined to be higher than the safety threshold value.

7. The battery protection module according to any one of claims 1 to 5, wherein the heat sensitive component and the heat generating component are disposed on a Printed Circuit Board (PCB),

the PCB includes:

a first layer, the metal attached to a first side of the first layer being the heating element;

the second layer is positioned on the second side of the first layer, the thermosensitive assembly is positioned on the second layer, and the first layer and the second layer are isolated from the heating assembly.

8. The battery protection module of claim 7,

the distance between the heat sensitive component and the first layer is between 0.1mm and 0.2 mm.

9. The battery protection module of claim 7,

the first layer is covered by a copper foil conductor; and/or the presence of a gas in the gas,

the second layer is made of epoxy resin.

10. A method of protecting a battery, the method comprising:

11. The method of claim 10, further comprising:

and adjusting the heating power of the heating component through an adjusting component.

12. The method of claim 10, wherein the detected signal value comprises at least one of:

a current value, a voltage value of the controlled loop, and a temperature value of the battery.

13. The method according to any one of claims 10 to 12, further comprising:

when the detection signal value is determined to be higher than a safety threshold value, a controlled switch in the controlled circuit is controlled to be turned off, so that the charging or discharging of the battery through the controlled loop is stopped.

14. A battery, comprising:

an electric core;

the battery core is connected with the battery protection module set in any one of claims 1-9.

15. A mobile terminal, comprising:

a battery connected to the interface, the battery of claim 14.