CN219067883U

CN219067883U - Power supply control module, battery pack and terminal equipment

Info

Publication number: CN219067883U
Application number: CN202222903550.7U
Authority: CN
Inventors: 廖志君
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-05-23
Anticipated expiration: 2032-11-01

Abstract

The present disclosure relates to a power supply control module, a battery pack, and a terminal device, the power supply control module including: a power supply circuit for connecting a load; a first controlled switch located on the power supply circuit; the control circuit is provided with a detection end and is connected with the control end of the first controlled switch; the control circuit is used for controlling the first controlled switch to be closed after the voltage of the detection end is recovered from the abnormal value to be within a preset range; and the recovery circuit is connected with the detection end and is used for carrying out discharge treatment on the detection end when the voltage of the detection end is abnormal so as to recover the voltage of the detection end to be within a preset range.

Description

Power supply control module, battery pack and terminal equipment

Technical Field

The disclosure relates to the technical field of battery protection, and in particular relates to a power supply control module, a battery pack and terminal equipment.

Background

With the increasing popularity of portable terminal devices, batteries have been widely used as energy supply sources. The terminal device needs a battery to continuously supply power to ensure the normal operation of the terminal device. When the battery is used, overload protection can occur, and at this time, the power supply loop needs to be cut off immediately to ensure safe use of the battery pack.

The power supply control module of the existing battery pack needs to be recovered in a mode of manually disconnecting a load from a power supply circuit after overload protection, and the recovery protection is troublesome and has a certain delay.

Disclosure of Invention

The disclosure provides a power supply control module, a battery pack and a terminal device.

According to a first aspect of the present disclosure, there is provided a power supply control module including:

a power supply circuit for connecting a load;

a first controlled switch located on the power supply circuit;

the control circuit is provided with a detection end and is connected with the control end of the first controlled switch; the control circuit is used for controlling the first controlled switch to be closed after the voltage of the detection end is recovered from the abnormal value to be within a preset range;

and the recovery circuit is connected with the detection end and is used for carrying out discharge treatment on the detection end when the voltage of the detection end is abnormal so as to recover the voltage of the detection end to be within a preset range.

In some embodiments, the recovery circuit includes:

a first sub-circuit including a first resistor and a second resistor; wherein the second resistor is grounded;

the first resistor is electrically connected with the detection end.

In some embodiments, the recovery circuit further comprises:

a second sub-circuit, wherein the second sub-circuit has a second controlled switch thereon;

the second controlled switch is closed, the second sub-circuit is conducted, the first sub-circuit is shorted by the second sub-circuit, and the detection end discharges through the second sub-circuit;

the second controlled switch is opened, the second sub-circuit is opened, and the detection end discharges through the first sub-circuit.

In some embodiments, the second sub-circuit further comprises: a third resistor and a fourth resistor; the third resistor and the fourth resistor are connected in series between the charging end and the grounding point;

the third resistor and the fourth resistor are used for dividing the voltage between the charging end and the grounding point;

the control end of the second controlled switch is connected between the third resistor and the fourth resistor;

the charging end receives a supply current, and the second controlled switch conducts the second sub-circuit;

the charging terminal does not receive a supply current, and the second controlled switch turns off the second sub-circuit.

In some embodiments, a resistance ratio between the first resistor and the second resistor is 100:1 to 1000:1.

In some embodiments, the second controlled switch is a transistor or a metal oxide semiconductor field effect transistor.

In some embodiments, the power control module includes:

a first detection circuit comprising: and the detection element is positioned on the power supply circuit and is used for providing a detection value for the control circuit based on the electric signal on the detection element.

In some embodiments, the power control module further comprises: a second detection circuit;

the second detection circuit comprises a thermistor;

the control circuit is connected with the second detection circuit and is used for controlling the switching state of the first controlled switch according to the temperature value detected by the second detection circuit.

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

a plurality of cells connected in series;

the power supply control module according to any one of the above embodiments;

the power supply control module is connected with a plurality of the battery cells.

According to a third aspect of the present disclosure, there is provided a terminal device comprising:

the battery pack according to the previous embodiment.

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

when overload protection occurs to the battery pack, the control circuit triggers protection and cuts off the power supply circuit. According to the embodiment of the disclosure, the recovery circuit is added in the power supply control module and is connected with the detection end of the control circuit, so that the detection end of the control circuit discharges, the voltage of the detection end is recovered to a preset range, and the overload automatic and quick recovery function can be realized without disconnecting the load from the power supply circuit, so that the overload automatic and quick recovery function is simple and quick.

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 disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a power supply control module according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of a power supply control module according to an embodiment of the disclosure.

Fig. 3 is a schematic diagram of a recovery circuit of an embodiment of the present disclosure.

Fig. 4 is a schematic diagram of a power supply control module according to an embodiment of the present disclosure.

Fig. 5 is a schematic circuit configuration diagram of a power supply control module according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus consistent with some aspects of the disclosure as detailed in the accompanying claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and the terms "a" and "an" are used individually. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

As shown in fig. 1, the embodiment of the present disclosure provides a power supply control module 100, the power supply control module 100 including:

a power supply circuit 1 for connecting a load;

a first controlled switch 2 located on the power supply circuit 1;

a control circuit 3 having a detection terminal 31 and connected to the control terminal 21 of the first controlled switch 2; the control circuit 3 is configured to control the first controlled switch 2 to be closed after the voltage of the detection terminal 31 is recovered from the abnormal value to be within a preset range; wherein, the power supply circuit 1 is overloaded, and the voltage of the detection terminal 31 is the abnormal value;

and the recovery circuit 4 is connected with the detection end 31 and is used for carrying out discharge treatment on the detection end 31 when the voltage of the detection end 31 is abnormal so as to recover the voltage of the detection end 31 to be within a preset range.

In the embodiment of the present disclosure, the power supply control module 100 is applicable to a scenario of charging and discharging a battery pack.

As shown in fig. 2, the power supply control module 100 of the embodiment of the disclosure may be connected to the output terminal of the battery pack 5, that is, connected to the positive electrode and the negative electrode of the battery pack, so that the power supply control module may be used to control the power supply of the battery pack 5, and may also be used to implement functions of overload protection, automatic recovery of overload, and the like of the battery pack 5.

The power supply control module comprises a power supply circuit 1, and the power supply circuit 1 comprises an output positive electrode 11 and an output negative electrode 12. The power supply circuit 1 may be connected to a load circuit in the external load 6, so that the power supplied from the battery pack 5 may be transferred to the load circuit based on the power supply circuit 1 to enable the load circuit to be powered on.

The load circuit includes, for example, a hardware circuit of each functional module on a motherboard of the terminal device. The terminal device may comprise, for example, a mobile terminal device or a wearable electronic terminal device. The functional module can comprise an audio output module, an audio amplifying module, a camera module or the like.

In the embodiment of the present disclosure, the first controlled switch 2 is located on the power supply circuit 1, and may control on or off of the power supply circuit 1. The power supply control module 100 can control the power supply of the battery pack through the first controlled switch 2, and has simple circuit structure and high realizability.

The first controlled switch 2 comprises a closed state and an open state.

When the first controlled switch 2 is in a closed state, the power supply circuit 1 is communicated, so that the power supply of the load by the battery pack can be realized.

When the first controlled switch 2 is in the off state, the power supply circuit 1 is turned off, and the battery pack stops supplying power to the load.

Illustratively, the first controlled switch 2 may include a transistor or a metal oxide semiconductor field effect transistor or the like, and embodiments of the present disclosure are not limited.

The control circuit 3 may be any circuit capable of controlling the closing and opening of the first controlled switch 2, the control circuit 3 being connected to the control terminal 21 of the first controlled switch 2.

In the embodiment of the disclosure, the control circuit 3 includes a detection terminal 31, and the voltage detection range of the detection terminal 31 is between-15V and 40V.

When the voltage is too high, the power supply circuit 1 is overloaded, and the voltage at the detection terminal 31 is abnormal.

In order to prevent the load circuit in the load from being damaged by the excessive voltage, when the voltage at the detection terminal 31 is an abnormal value, the control terminal 21 outputs a first control signal to control the first controlled switch 2 to be turned off, so that the power supply circuit 1 can stop supplying power to the load to protect the load circuit. When the voltage at the detecting terminal 31 is recovered from the abnormal value to the preset range, the control terminal 21 outputs a second control signal to control the first controlled switch 2 to be closed, and the power supply circuit 1 recovers the power supply.

The preset range is the voltage of the detection end during normal power supply without overload and other abnormal phenomena of the power supply circuit. Therefore, when the voltage at the detection end is detected to be restored within the preset range, the abnormal power supply phenomena such as current overload and the like are eliminated, and at the moment, the voltage in the power supply circuit is normal, so that the safe use of the battery pack can be ensured.

The preset range is typically a voltage value less than 3V, and the voltage at the detection terminal 31 is an abnormal value when the voltage is greater than or equal to 3V, and the voltage is an abnormal value, which indicates that the power supply circuit 1 is overloaded.

In general, when the power supply circuit 1 is overloaded, automatic recovery cannot be achieved, and a user needs to perform manual operations, for example, disconnect the load 6 from the power supply circuit 1 to recover the voltage at the detection end 31 to a preset range, and then re-connect the load 6 to the power supply circuit 1 to recover power.

In the disclosed embodiment, the power supply control module 100 further comprises a recovery circuit 4, the recovery circuit 4 being also connected to the detection terminal 31 of the control circuit 3 for discharging of said detection terminal 31. When the power supply circuit 1 is overloaded, the voltage at the detection end 31 is very large, and the recovery circuit can discharge the detection end 31 at the moment, so that the voltage at the detection end 31 is recovered to be within a preset range, namely below 3V, and thus overload protection can be automatically relieved without manually disconnecting the load from the power supply circuit by a user, the operation is simple and quick, and the use experience of the user is improved.

As shown in fig. 3, the recovery circuit 4 includes:

a first sub-circuit 41 including a first resistor and a second resistor; wherein the second resistor is grounded;

the first resistor is electrically connected to the detection terminal 31.

When the power supply circuit 1 is overloaded, the first controlled switch 2 is in an off state, the voltage of the detection terminal 31 of the control circuit is pulled up to be the same high voltage as the output positive electrode 11 or in a suspended state, and the protection state can be released only when the voltage of the detection terminal 31 is restored to be within a preset range.

At this time, the user does not need to disconnect the load, and the voltage can connect the output cathode 12 of the power supply circuit 1 with the ground point to form an activated state through the first resistor and the second resistor which are connected in series in the first sub-circuit 41, so as to realize discharging, and in this way, the voltage of the detection terminal 31 can be pulled down to be within a preset range, thereby relieving overload protection.

In some embodiments, the first resistor and the second resistor are connected in series.

The recovery circuit 4 further includes:

a second sub-circuit 42, wherein the second sub-circuit 42 has a second controlled switch 421 thereon;

the second controlled switch 421 is closed, the second sub-circuit 42 is turned on and the first sub-circuit 41 is shorted by the second sub-circuit 42, and the detection terminal 31 discharges through the second sub-circuit 42;

the second controlled switch 421 is opened, the second sub-circuit 42 is opened, and the detection terminal is discharged through the first sub-circuit 41.

In the embodiment of the present disclosure, the recovery circuit 4 further includes a second sub-circuit 42, and when the power supply control module turns on the external charging device to charge, the detection terminal 31 may be discharged through the second sub-circuit 42.

The charging device includes, but is not limited to, a charger or a battery.

The second sub-circuit 42 includes a second controlled switch 421, and when the power supply control module is connected to the external charging device, the second controlled switch 421 is in a closed state, at this time, the second sub-circuit 42 is in a conductive state, and the first sub-circuit 41 is shorted by the second sub-circuit 42, so that the detection terminal 31 is connected to the ground point through the second controlled switch 421 of the second sub-circuit 42 in a conductive state, thereby realizing a rapid discharge and pulling down the voltage.

When the power supply control module is not connected with the external charging equipment, the second controlled switch 421 is in an off state, at this time, the second sub-circuit 42 is also in an off state, the first sub-circuit 41 is in an on state, and the detection end 31 is connected to the ground point through the first sub-circuit 41 in an on state, so that discharging is realized, and the voltage is pulled down.

In some embodiments, the restoration circuit 4 may not have the second sub-circuit 42, and the discharge is performed through the first sub-circuit 41 regardless of whether the power supply control module is connected to an external charging device.

In the embodiment of the present disclosure, the second sub-circuit 42 includes a second controlled switch 421, and the second controlled switch 421 may be, for example, a triode, so that when the detecting terminal 31 discharges through the second sub-circuit 42, the discharging speed is faster, and the voltage of the detecting terminal 31 can be recovered to the preset range faster, so as to release the overload protection state.

Thus, when overload occurs in the power supply circuit 1, whether the power supply control module is communicated with external charging equipment for charging or not, the quick discharge of the detection end 31 can be realized through the first sub-circuit 41 or the second sub-circuit 42 of the recovery circuit, the voltage of the detection end 31 is effectively lowered, the overload protection state can be relieved without manual operation of a user, and the user experience is improved.

The second sub-circuit 42 further includes: a third resistor and a fourth resistor; the third resistor and the fourth resistor are connected in series between the charging end and the grounding point;

the third resistor and the fourth resistor are used for dividing voltage between the charging end and the grounding point;

the control end of the second controlled switch 421 is connected between the third resistor and the fourth resistor;

the charging end receives a supply current, and the second controlled switch 421 conducts the second sub-circuit;

the charging terminal does not receive a supply current, and the second controlled switch 421 opens the second sub-circuit.

The third resistor and the fourth resistor are connected in series between the charging end and the grounding point, and when the charging end is supplied with current, the power supply control module is communicated with external charging equipment, and at the moment, the third resistor and the fourth resistor play a role in voltage division.

The charging end receives the power supply current, the second controlled switch 421 turns on the sub-circuit, and at this time, the detecting end 31 forms a discharging loop with the ground point through the second controlled switch 421, so as to quickly pull down the voltage of the detecting end 31.

The charging terminal does not receive the supply current, the second controlled switch 421 opens the second sub-circuit, and at this time, the detecting terminal 31 forms a discharging loop with the ground point through the first resistor and the second resistor of the first sub-circuit 41 of the recovery circuit, and pulls down the voltage of the detecting terminal 31.

The resistance ratio between the first resistor and the second resistor is 100:1 to 1000:1.

Illustratively, the first resistor may have a resistance of megaohms and the second resistor may have a resistance of kiloohms, such that the voltage drop across the second resistor is small after voltage division, and the current flowing from the output cathode 12 through the second resistor to ground is also small.

The second controlled switch 421 is a transistor or a mosfet.

In the disclosed embodiment, the second controlled switch 421 is a triode. The base of the second controlled switch 421 is connected between the third resistor and the fourth resistor. When there is a current between the third resistor and the fourth resistor, the base of the second controlled switch 421 is at a high level, and at this time, the collector and the emitter of the second controlled switch 421 can be in a conductive state, so that the detection terminal 31 is connected to the ground point through the second controlled switch 421. If the second controlled switch 421 is a triode, the base of the triode is the control terminal of the second controlled switch 421.

In general, when the second controlled switch 421 is a triode, the second controlled switch 421 can be in a conductive state as long as the voltage at the base of the triode is greater than 0.7V.

When the triode is used as a controlled switch, the starting and closing action speed is faster than that of a common mechanical switch, and the reaction is more flexible. The starting and closing time of the general switch is calculated in milliseconds, and the triode switch is calculated in microseconds, so that the response is more sensitive, and the hysteresis of overload protection can be relieved after the overload of the power supply circuit 1 is reduced greatly.

In addition, the triode is safe and reliable, has mechanical abrasion and has longer service life.

In some other embodiments, the second controlled switch may also be a Metal-Oxide-Semiconductor Field-Effect Transistor (Mosfet), where the gate of the second controlled switch is the control terminal and the source and drain of the MOS are the controlled terminals.

The power supply control module includes:

a first detection circuit comprising: and a detection element positioned on the power supply circuit 1 and used for providing detection values for the control circuit based on the electric signals on the detection element.

The power supply control module further comprises a first detection circuit, the control circuit comprises a current detection end, and the first detection circuit is connected with the current detection end of the control circuit.

The current detection end is electrically connected to the grounding point through the power consumption resistor and the detection element in sequence.

The power dissipation resistor may be used to prevent large currents from entering the control circuit and damaging the circuit.

The detecting element may be, for example, an alloy resistor, when a current passes through the detecting element, an electrical signal is generated, the current detecting end collects an electrical signal parameter and compares the electrical signal parameter with a preset value, so that the control circuit can determine whether an overcurrent or a short circuit occurs, and when the overcurrent or the short circuit occurs, the first controlled switch 2 is immediately controlled to be turned off, so as to protect the use safety of the battery pack.

The electrical signal may be, for example, a voltage or a current.

The power supply control module further includes: a second detection circuit;

the second detection circuit comprises a thermistor;

the control circuit is connected with the second detection circuit and is used for controlling the switching state of the first controlled switch 2 according to the temperature value detected by the second detection circuit.

The power supply control module further comprises a second detection circuit, the control circuit comprises a temperature detection end, and the second detection circuit is connected with the temperature detection end of the control circuit.

When the temperature increases, the resistance of the thermistor decreases. When the resistance of the thermistor is smaller than the preset resistance, the overheat phenomenon can be considered to occur, and at this time, the control circuit can control the first controlled switch 2 to be turned off in real time, so as to protect the use safety of the battery pack.

The second detection circuit utilizes the characteristic that the resistance value of the thermistor changes along with the temperature to collect the ambient temperature in real time, and when the over-temperature phenomenon occurs, the first controlled switch 2 is controlled to be turned off to protect the battery and prolong the service life of the battery.

The presently disclosed embodiments also provide a battery pack 4, the battery pack 4 including:

a plurality of cells connected in series;

the power supply control module 100 according to any one of the above embodiments;

The battery pack 4 may be, for example, a lithium ion battery pack. The lithium battery pack includes one or more lithium battery cells. If the lithium battery pack includes a plurality of lithium battery cells, the plurality of lithium battery cells may be connected in series to provide a large voltage power supply. Lithium battery cells are understood herein to be lithium battery cells.

In an embodiment of the disclosure, the battery pack includes a plurality of battery cells and a power supply control module connected in series. The power supply control module can be packaged in a battery shell with the battery core, the battery core is connected with the power supply control module and is positioned in the battery shell, and the output end and the charging end of the power supply circuit 1 of the power supply control module extend to the outer side of the battery shell and can be connected with external charging equipment or a load circuit.

The embodiment of the disclosure also provides a terminal device, which includes: and a battery pack 4.

The terminal device may be, for example, a mobile terminal device or a wearable terminal electronic device. Mobile terminal devices include, but are not limited to, cell phones, notebooks, tablet computers, etc. Wearable terminal electronic devices include, but are not limited to, smart watches or smart bracelets, and the like.

In the embodiment of the disclosure, the electric energy provided by the battery pack may be output to the load circuit inside the terminal device through the output terminal of the power supply circuit 1 of the power supply control module to provide the working current for the load circuit.

The power supply control module is located in the terminal equipment, and the charging port of the terminal equipment can be arranged to be connected with the charging end of the power supply control module. When the charging equipment is connected to the charging port of the terminal equipment, the charging equipment can supply electric energy to the charging end of the power supply control module through the charging port of the terminal equipment.

The terminal device comprises one or more power consumption modules. The power consumption modules are electrically connected with the battery pack 4 and are used for receiving power supply of the battery pack 4.

Illustratively, the power consumption module includes, but is not limited to: a processor, a display screen and/or a camera of the terminal device, etc.

The processor may include a central processor, a microprocessor, an image processor, and/or an embedded controller, among others.

The display screen may include: a liquid crystal display or an Organic Light Emitting Diode (OLED) display, etc. The display screen may be a flexible screen or a rigid screen.

The cameras may include front cameras and/or rear cameras.

In some embodiments, the terminal device is installed with an operating system and one or more application programs.

The processor is used for monitoring the condition information of the power supply circuit based on the code operation of the operating system and/or the application program, and adjusting the load capacity of the terminal equipment according to the condition information.

For example, the processor may be specifically configured to determine, according to the condition information, that the first controlled switch has disconnected the power supply circuit, and consider that an overload phenomenon may occur at this time, and if the overload phenomenon occurs, reduce the load of the terminal device, for example, by closing one or more application programs to reduce the load of the terminal device, and/or closing one or more hardware in the terminal device, thereby reducing the load, so that when the power supply circuit automatically resumes power supply, no power supply abnormality occurs at least for a short period of time.

A specific example is provided below in connection with any of the embodiments described above:

as shown in fig. 4 and 5, a six-series lithium battery cell protection circuit with rapid overload recovery (i.e., the protection circuit is one of the foregoing power supply control modules) is composed of 18 resistors, 14 capacitors, 2 diodes, 2 fuses, 1N-channel Mosfet, 1P-channel Mosfet, 2 triodes, 1 sampling resistor, 1 NTC, 1 protection IC, and the like.

The six lithium battery cells (i.e., the six lithium battery cells are one of the plurality of battery cells connected in series) include a first lithium battery cell B1, a second lithium battery cell B2, a third lithium battery cell B3, a fourth lithium battery cell B4, a fifth lithium battery cell B5, and a sixth lithium battery cell B6. Six lithium battery cells are connected in series in sequence.

The protection circuit comprises a control chip U1, a positive power input pin VCC of the control chip U1 is electrically connected with the positive electrode end of a sixth lithium battery monomer B6 through a power consumption resistor R1 and a power-on reverse-connection-preventing diode D1 in sequence, the power consumption resistor R1 is used for preventing large current from entering the control chip U1 to damage an internal integrated circuit, the positive power input pin VCC of the control chip U1 is electrically connected with a grounding point through a voltage stabilizing capacitor C1, the voltage stabilizing capacitor C1 is used for stabilizing output voltage and preventing error protection during discharging, a negative power input pin VSS of the control chip U1 is electrically connected with the negative electrode end of the first lithium battery monomer, and the positive power input pin VCC and the negative power input pin VSS pin are matched for use to provide power for the control chip U1.

The battery voltage input pins VC1, VC2, VC3, VC4, VC5 and VC6 of the control chip U1 are electrically connected with the positive electrode end of the sixth lithium battery cell through power consumption resistors R2, R3, R4, R5, R6 and R7 respectively, the power consumption resistors are used for preventing large current from entering the control chip U1 to damage an internal integrated circuit, the battery voltage input pins VC1, VC2, VC3, VC4, VC5 and VC6 of the control chip are electrically connected with the negative electrode end B0 of the first lithium battery cell through filter capacitors C2, C3, C4, C5, C6 and C7 respectively, and the voltage signals entering the control chip U1 are smoother through the filter capacitors C2, C3, C4, C5, C6 and C7.

U1, R2, R3, R4, R5, R6, R7, R8, R10, R15, R16, R17, R18, C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, RS1, RT1, F2, Q1, Q2, Q4, F1, F2 constitute a BMS management circuit (BATTERY MANAGEMENT SYSTEM ) (i.e., BMS management circuit is one of the aforementioned control circuits), Q3 (i.e., Q3 is one of the aforementioned second controlled switches), R11 (i.e., R11 is one of the aforementioned first resistors), R12 (i.e., R12 is one of the aforementioned second resistors), R13 (i.e., R13 is one of the aforementioned third resistors), R14 (i.e., R14 is one of the aforementioned fourth resistors) constitute a control recovery circuit (i.e., one of the aforementioned recovery control circuits).

In the protection recovery circuit, one end of R12 is connected with a charging end C+ and the other end of R12 is connected with one end of R13 and a base electrode of Q3, an emitter electrode of Q3 is connected with one end of R14, the other end of R13 and a grounding point VSS, and a collector electrode of Q3 is connected with one end of R11 and a load detection pin VM of U1; the other end of R11 is connected with the other end of R14 and the output cathode P-/C of BMS.

When overload protection occurs to the battery pack BMS management circuit, Q1 (i.e., Q1 is one of the first controlled switches) is in an off state, and the VM pin of U1 (i.e., the VM pin is one of the detection terminals) is pulled up to the same high level as p+ by the load or in a suspended state, and the protection state can be released only when the VM pin of U1 is lower than 3V. At this time, if the load is not turned off, the BMS output negative electrode P-/C-is connected to the ground point VSS through R14 to form an active state, the VM pin of U1 is pulled down to a low level, and the protection state of the BMS management circuit is released. The resistance of R14 is set to be in the kiloohm level, and the value of R11 is set to be in the megaohm level, so that the voltage drop at two ends of R14 after partial pressure is small, and the current value flowing from P-/C-to VSS through R14 is also small and can be almost ignored.

When the plug-in charger charges, the voltage is divided by the two resistors R12 and R13, the base electrode of the Q3 is at a high level, the collector electrode of the Q3 and the transmitter are in a conducting state, the VM pin of the U1 is also conducted and connected to the grounding point VSS through the Q3 to be at a low level, and the protection state of the BMS management circuit is released.

Fig. 6 is a block diagram illustrating a terminal device 800 according to an exemplary embodiment. For example, the terminal device 800 may be included in a terminal device such as a mobile phone, a mobile computer, or a server, and in any one of communication devices, the data processing terminal device 800 may be included.

Referring to fig. 6, a terminal device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions 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 operations at the device 800. Examples of such data include instructions for any application or method operating on terminal device 800, contact data, phonebook data, messages, pictures, video, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile 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 disk.

The power supply component 806 provides power to the various components of the terminal device 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal device 800.

The multimedia component 808 includes a screen between the terminal device 800 and the user that provides an output interface. 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 input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operational state, such as a photographing state or a video state. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

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 terminal device 800 is in an operational state, such as a call state, a recording state, and a voice recognition state. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further 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 a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the terminal device 800. For example, the sensor assembly 814 may detect an on/off state of the device 800, a relative positioning of the assemblies, such as a display and keypad of the terminal device 800, the sensor assembly 814 may also detect a change in position of the terminal device 800 or a component of the terminal device 800, the presence or absence of a user's contact with the terminal device 800, an orientation or acceleration/deceleration of the terminal device 800, and a change in temperature of the terminal device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects 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 gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal device 800 and other devices, either wired or wireless. The terminal device 800 may access a wireless network based on a communication standard, such as Wi-Fi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one 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 terminal device 800 can 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, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

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

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

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A power control module, comprising:

a power supply circuit for connecting a load;

a first controlled switch located on the power supply circuit;

and the recovery circuit is electrically connected with the detection end and is used for carrying out discharge treatment on the detection end when the voltage detected by the detection end is abnormal, so that the voltage of the detection end is recovered to be within a preset range.

2. The power control module of claim 1, wherein the restoration circuit comprises:

the first resistor is electrically connected with the detection end.

3. The power control module of claim 2, wherein the restoration circuit further comprises:

4. The power control module of claim 3 wherein the second sub-circuit further comprises: a third resistor and a fourth resistor; the third resistor and the fourth resistor are connected in series between the charging end and the grounding point; the third resistor and the fourth resistor are used for dividing the voltage between the charging end and the grounding point; the control end of the second controlled switch is connected between the third resistor and the fourth resistor;

5. The power control module of claim 2, wherein,

6. The power control module of claim 3, wherein,

the second controlled switch is a triode or a metal oxide semiconductor field effect transistor.

7. The power control module of claim 1, wherein the power control module comprises:

8. The power control module of claim 1, further comprising: a second detection circuit;

the second detection circuit comprises a thermistor;

9. A battery pack, the battery pack comprising:

a plurality of cells connected in series;

the power supply control module according to any one of claims 1 to 8;

10. A terminal device, characterized in that the terminal device comprises:

the battery pack of claim 9.