CN116566022A

CN116566022A - Charge protection circuit and charge control method

Info

Publication number: CN116566022A
Application number: CN202310835172.XA
Authority: CN
Inventors: 余健洪; 吴锴翔
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2023-08-08

Abstract

The disclosure relates to the technical field of electronic equipment, and particularly provides a charging protection circuit and a charging control method. The utility model provides a charge protection circuit, includes circuit board, detection component and controller, and the circuit board includes power end and two at least first connectors, and the power end is used for the input charging source, and the power end is connected with every first connector respectively, and first connector is used for pluggable connection with the second connector of battery module, and detection component is including locating respectively power end and every first connector's connecting circuit's power supply detection device, the controller is according to each power supply detection device's parameter value confirm the connected state of first connector and second connector. In the embodiment of the disclosure, for the charging circuit with multiple power supplies, the detection component is used for detecting the parameters of each power supply circuit, so that the on-off detection of each power supply circuit is realized, the hidden danger of current overload caused by the falling of the connector is avoided, and the charging safety is improved.

Description

Charge protection circuit and charge control method

Technical Field

The disclosure relates to the technical field of electronic equipment, in particular to a charging protection circuit and a charging control method.

Background

With the development of the quick charging technology, the charging power of the electronic equipment is higher and higher, the time required by full charge is shorter and shorter, and the charging experience of a user is greatly improved. At the same time, however, high power, high current fast charging techniques also present a significant challenge to the safety of charging of electronic devices.

Disclosure of Invention

In order to achieve connection and disconnection detection of a battery of electronic equipment and a circuit board and improve charging safety, the embodiment of the disclosure provides a charging protection circuit, a charging control method, a charging control device, the electronic equipment and a storage medium.

In a first aspect, embodiments of the present disclosure provide a charge protection circuit applied to an electronic device, the circuit including:

the circuit board comprises a power end and at least two first connectors, wherein the power end is used for inputting a charging power supply, the power end is respectively connected with each first connector, and the first connectors are used for being connected with a second connector of the battery module in a pluggable manner;

the detection assembly comprises a power supply detection device which is respectively arranged on the power supply end and a connection circuit of each first connector; and

and the controller is configured to detect the parameter value of each power supply detection device in the charging process of the electronic equipment and determine the connection state of the first connector and the second connector according to the parameter value of each power supply detection device.

In some embodiments, the power supply detection device includes a voltage detection device provided on a connection circuit between the power supply terminal and the first connector;

the controller is configured to detect a voltage value of each voltage detection device during charging of the electronic device, and determine a connection state of the first connector and the second connector according to the voltage value of each voltage detection device.

In some embodiments, the detection assembly further includes a comparator, an input end of the comparator is connected to each voltage detection device, and an output end of the comparator is connected to the controller;

the comparator is configured to detect a voltage difference according to the voltage values of any two voltage detection devices and send the voltage difference to the controller;

the controller is configured to determine a connection state of the first connector and the second connector according to the voltage difference.

In some embodiments, the power detection means comprises temperature detection means disposed proximate to the first connector;

the controller is configured to detect a temperature value of each temperature detection device during charging of the electronic apparatus, and determine a connection state of the first connector and the second connector according to the temperature value of each temperature detection device.

In some embodiments, the power detection means comprises a heat detection means disposed proximate to the first connector;

the controller is configured to detect a thermal value of each thermal detection device during charging of the electronic device, and determine a connection state of the first connector and the second connector according to the thermal value of each thermal detection device.

In some embodiments, the power detection device further comprises a heat detection device disposed proximate to the first connector;

the controller is configured to detect a heat value of each heat detecting device during charging of the electronic apparatus, and determine a connection state of the first connector and the second connector according to a voltage value of each voltage detecting device and a heat value of each heat detecting device.

In some embodiments, the voltage detection device comprises a precision resistor and/or the heat detection component comprises a thermistor.

In a second aspect, embodiments of the present disclosure provide a charging control method, applied to an electronic device, the method including:

in the charging process of the electronic equipment, acquiring a parameter value of a power supply detection device of each power supply circuit of which the circuit board of the electronic equipment supplies power for a battery module;

And determining the connection state of each power supply circuit of the circuit board and the battery module according to the difference of parameter values among the power supply detection devices.

In some embodiments, the power supply detection device includes a voltage detection device and a heat detection device, and determining a connection state of each power supply circuit of the circuit board and the battery module according to a difference of parameter values between the power supply detection devices includes:

acquiring heat values of the heat detection devices arranged at the connection positions of each power supply circuit and the battery module in response to the fact that the voltage difference of any two voltage detection devices is larger than a preset voltage threshold;

and determining that the connection state of at least one power supply circuit and the battery module is a falling state in response to the fact that the heat difference of the heat values of any two heat detection devices is larger than a preset heat threshold.

In some embodiments, the methods described in the present disclosure further comprise:

determining that the connection state of each power supply circuit and the battery module is a non-falling state in response to the voltage difference of any two voltage detection devices being smaller than or equal to a preset voltage threshold;

And/or the number of the groups of groups,

and determining that the connection state of each power supply circuit and the battery module is a non-falling state in response to the fact that the heat difference of the heat values of any two heat detection devices is smaller than or equal to a preset heat threshold value.

In some embodiments, the power detection device includes one or more of a voltage detection device, a temperature detection device, and a heat detection device.

In a third aspect, embodiments of the present disclosure provide a charging control apparatus applied to an electronic device, the apparatus including:

the voltage detection module is configured to acquire a parameter value of a power supply detection device of each power supply circuit of the battery module supplied by a circuit board of the electronic equipment in the charging process of the electronic equipment;

and the state determining module is configured to determine the connection state of each power supply circuit of the circuit board and the battery module according to the difference of parameter values among the power supply detection devices.

In a fourth aspect, embodiments of the present disclosure provide an electronic device, including:

the charge protection circuit according to any one of the first aspects;

or alternatively, the process may be performed,

comprising a processor and a memory storing computer instructions for causing the processor to perform the method according to any embodiment of the second aspect.

In a fifth aspect, embodiments of the present disclosure provide a storage medium storing computer instructions for causing a computer to perform the method according to any embodiment of the second aspect.

The utility model provides a charge protection circuit, includes circuit board, detection component and controller, and the circuit board includes power end and two at least first connectors, and the power end is used for inputing charging source, and the power end is connected with every first connector respectively, and first connector is used for pluggable connection with the second connector of battery module, and detection component is including locating respectively power end and every first connector's connecting circuit's power supply detection device, the controller is according to the connected state of each power supply detection device's parameter value determination first connector and second connector. In the embodiment of the disclosure, for the charging circuit with multiple power supplies, the detection component is used for detecting the parameters of each power supply circuit, so that the on-off detection of each power supply circuit is realized, the hidden danger of current overload caused by the falling of the connector is avoided, and the charging safety is improved.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic diagram of a charging circuit structure of an electronic device in the related art.

Fig. 2 is a schematic diagram of a charge protection circuit according to some embodiments of the present disclosure.

Fig. 3 is a schematic diagram of a charge protection circuit in accordance with some embodiments of the present disclosure.

Fig. 4 is a schematic diagram of a charge protection circuit according to some embodiments of the present disclosure.

Fig. 5 is a schematic diagram of a charge protection circuit according to some embodiments of the present disclosure.

Fig. 6 is a flow chart of a charge control method in accordance with some embodiments of the present disclosure.

Fig. 7 is a flow chart of a charge control method in accordance with some embodiments of the present disclosure.

Fig. 8 is a block diagram of a charge control device according to some embodiments of the present disclosure.

Fig. 9 is a block diagram of an electronic device in accordance with some embodiments of the present disclosure.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure. In addition, technical features related to different embodiments of the present disclosure described below may be combined with each other as long as they do not make a conflict with each other.

Nowadays, the quick charging function has become standard of consumer electronic equipment, charging power is higher and higher, the power is gradually increased from the early 40W power to 67W or even more than hundred watts, so that the time required for fully charging the electronic equipment is shorter and shorter, and the use experience of users is greatly improved.

However, at the same time, with the increase of the charging power, the large-current quick charging brings more heat productivity and potential safety hazard. Therefore, in the related art, the power supply mode of the circuit Board and the battery of the electronic device is changed from the original 1-way power supply to two-way power supply, that is, the battery is connected with the female socket on the circuit Board through 2 or more BTB (Board to Board) connectors, and the charging current of each way is reduced through the multi-way parallel connection mode, so as to ensure the charging safety.

Fig. 1 shows a charging circuit structure of an electronic device in the related art, and a charging principle is described below with reference to fig. 1.

As shown in fig. 1, the charging circuit includes a circuit board 100 and a battery module 200. The circuit board 100 includes a power terminal 110, where the power terminal 110 refers to a charging port of an electronic device, and is used for being connected to an external power source to charge the electronic device. For example, the electronic device may take a mobile phone as an example, the power supply terminal 110 may be a charging interface disposed at the bottom of the mobile phone, and the charging interface may be, for example, a USB (Universal Serial Bus ) interface, a Micro USB interface, a Type-C interface, or the like. The charging interface can be in pluggable connection with the power adapter, so that when the charging interface is connected with the power adapter, the electronic equipment can be charged by connecting an external power supply through the power adapter.

In the example of fig. 1, the charging circuit of the circuit board 100 includes two paths, i.e., a first power supply circuit 121 and a second power supply circuit 122 connected in parallel. One end of the first power supply circuit 121 is connected to the power supply terminal 110, and the other end is connected to the connector socket a provided on the circuit board 100. One end of the second power supply circuit 122 is connected to the power supply terminal 110, and the other end is connected to the connector socket b provided on the circuit board 100.

The connector refers to a BTB connector, which includes a male socket and a female socket, the female socket of the connector generally refers to a socket of the BTB connector, and the male socket refers to a plug of the BTB connector, and the electrical connection between the battery module 200 and the circuit board 100 can be achieved through the detachable connection of the male socket and the female socket.

The battery module 200 is provided with two connector male bases, namely an FPC (Flexible Printed Circuit, flexible circuit board) connector a and an FPC connector b, the two FPC connectors are connected with a battery protection board 220, and the battery protection board 320 is used for carrying out battery cell monitoring, overheat protection and the like on the battery cell 210. The FPC connector a of the battery module 200 is buckled with the connector female socket a on the circuit board 100, and the FPC connector b is buckled with the connector female socket b on the circuit board 100, so that the battery module 200 is electrically connected with the circuit board 100.

In the charging process of the electronic device, an external power source flows in through the power supply terminal 110, reaches the connector socket a and the connector socket b through the first power supply circuit 121 and the second power supply circuit 122 respectively, and then sequentially passes through the FPC connector a and the FPC connector b of the battery module 200 to supply power to the battery module 200 through connection of the BTB connector.

In the charging process, the charging current is divided into two paths, so that the larger charging current is divided into two smaller currents to supply power to the battery module 200, the heating value and the device load in the charging process are reduced, and the charging safety is improved.

However, in practice, it was found that since the battery module 200 is fixed to the circuit board 100 through 2 BTB connectors, when the electronic device is impacted (e.g., dropped, bumped), one of the connectors easily falls off. However, since there is one connector, the electronic device does not report errors during the charging process, but only charges the battery module 200 through one power supply circuit. The charging function of the electronic equipment is seriously affected, and as only one power supply is provided, the current of the power supply circuit is doubled, so that the heat is concentrated, and even devices are burnt or even exploded in severe cases, so that serious potential safety hazards are generated.

Based on the defects of the related art, the embodiment of the disclosure provides a charging protection circuit, a charging control method, a charging control device, an electronic device and a storage medium, and aims to realize connection falling detection of a battery and a circuit board of the electronic device and improve charging safety.

In some embodiments, the present disclosure provides a charging protection circuit, which may be applied to an electronic device, for implementing charging of a battery module of the electronic device and detection of falling off during charging.

In some embodiments, a charge protection circuit of examples of the present disclosure includes a circuit board and a battery module. The circuit board refers to a PCB (Printed Circuit Board ) of an electronic device, on which various circuit structures and electrical components for realizing functions related to the electronic device are integrated.

The circuit board includes a power terminal and at least two first connectors, the power terminal refers to a port through which the electronic device is connected to an external power adapter, for example, in some embodiments, the power terminal is a charging interface of the electronic device. In the embodiment of the present disclosure, the specific interface Type of the power source terminal is not limited, and may be any interface Type suitable for implementation, for example, a USB interface, a Micro USB interface, a Type-C interface, and the like.

The first connector is a structure which is arranged on the circuit board and is used for being detachably connected with the second connector of the battery module. For example, in some embodiments, the first connector on the circuit board and the second connector of the battery module may be BTB connectors, so that one of the first connector and the second connector is a male BTB connector socket, and the other is a female BTB connector socket, and the electrical connection between the battery module and the circuit board is achieved through the snap-fit connection between the male connector socket and the female connector socket.

It should be noted that, in the embodiment of the disclosure, the circuit board is connected to the battery module through a plurality of connectors, that is, the power supply circuit provided by the circuit board for the battery module includes multiple paths. For example, in some embodiments, at least two first connectors may be disposed on the circuit board, and similarly, the battery module is provided with the second connectors having the same number as the first connectors, so that the circuit board supplies power to the battery module through one-to-one snap connection between the first connectors and the second connectors.

For the circuit board, every first connector is connected with the power end to a plurality of power supply circuits of parallelly connected are formed with the power end to a plurality of first connectors, charge for the battery module through a plurality of parallelly connected power supply circuits to the heavy current fast charge process. According to the parallel circuit principle, the charging total current is equal to the sum of the currents of the power supply circuits, so that the current of the single power supply circuit is smaller, the heat loss is smaller and the safety is higher.

In the embodiment of the disclosure, the number of power supply circuits between the circuit board and the battery module may be any number greater than or equal to 2, for example, in one example, as shown in fig. 1, 2 power supply circuits of the circuit board 100 and the battery module 200 are combined, and connection between the two power supply circuits is established through two sets of the first connector and the second connector, respectively. Of course, the power supply circuit may be 3, 4 or more, and only more sets of connectors are required, which is not limited in this disclosure.

In the embodiment of the disclosure, in order to realize detection of the connection state of the first connector and the second connector on each power supply circuit, a corresponding detection component needs to be disposed on the charging protection circuit, that is, the detection component includes a power supply detection device disposed on each power supply circuit.

For example, in some embodiments, the power detection device comprises a voltage detection device. The detection assembly comprises a voltage detection device arranged on each power supply circuit, namely, a voltage detection device is arranged on a connection circuit between each first connector and the power supply end.

The voltage detection device is used for detecting the voltage of the power supply circuit, for example, in one example, the voltage detection device can be a precision resistor, and the precision resistor can detect tiny current change and has high detection precision.

It can be understood that, for a plurality of parallel power supply circuits, in a normal operation state, the current of each power supply circuit is equal, and in the case that the resistance values of the precision resistors are equal, it is known from the voltage formula u=ir that the voltages across the precision resistors should also be kept uniform. When the connector of one power supply circuit falls off, the power supply circuit cannot supply power to the battery module, so that the voltage at two ends of the precision resistor is zero. According to the principle, the falling detection of the connector of the power supply circuit can be realized by detecting the voltage of the voltage detection device on each power supply circuit.

For example, in other embodiments, the power detection device comprises a heat detection device. The detection assembly comprises a heat detection device arranged close to each first connector, i.e. one heat detection device is arranged close to each first connector.

The heat detecting device is used for detecting the heating condition of the power supply circuit, for example, in one example, the heat detecting device can be a thermistor, and the thermistor can detect small heat change and has high sensitivity.

It will be appreciated that for a plurality of parallel power supply circuits, the current of each power supply circuit is equal under normal operation, and the impedance of each first connector is the same according to the heating formula q=i ² Rt shows that the heat generated should be the same or close to each other when the current I flowing through each first connector is the same, the impedance R is the same, and the time t is the same. When the connector of one power supply circuit falls off, the one power supply circuit cannot supply power to the battery module, so that the current I flowing through the first connector becomes zero, and the heat generation is reduced. According to the principle, the falling detection of the connectors of the power supply circuits can be realized by detecting the heat of the heat detection devices on each power supply circuit.

For example, in still other embodiments, the power detection device comprises a temperature detection device. The sensing assembly includes a temperature sensing device disposed adjacent each of the first connectors, i.e., one temperature sensing device is disposed adjacent each of the first connectors.

The temperature detecting means may be, for example, a temperature sensor, which is operative to detect the temperature of the power supply circuit in which it is located, the principle of which is similar to the heat detecting means described above. For each parallel power supply circuit, the current should be the same under the normal working state, and the heating value should be the same or close, so the temperature collected by each temperature detection device should be the same or close. When the connector of one power supply circuit falls off, the one power supply circuit cannot supply power to the battery module, so that the current I flowing through the first connector becomes zero, the heat generation is reduced, and the temperature is reduced. According to the principle, the falling detection of the connector of the power supply circuit can be realized by detecting the temperature of the temperature detection device on each power supply circuit.

Of course, those skilled in the art will appreciate that the voltage detection device and the heat detection device may be implemented separately or in combination, and the disclosure is not limited thereto.

In the embodiment of the present disclosure, a controller is further disposed on the circuit board, and the controller refers to a main control circuit of the electronic device, for example, a CPU (Central Processing Unit ), soC (System-on-Chip), or the like of the electronic device.

The controller includes a memory and a processor, which may be of any type, that is a processor having one or more processing cores that may perform single-threaded or multi-threaded operations for parsing instructions to perform operations such as fetching data, performing logical operation functions, and issuing operational processing results. The memory may include volatile or nonvolatile computer-readable storage media, such as at least one disk storage device, flash memory device, etc., and may have program storage areas for storing nonvolatile software programs, nonvolatile computer-executable programs, and modules for retrieval by a processor to cause the processor to perform one or more of the method steps below. The memory may also include a volatile random access medium, or a storage portion such as a hard disk, as a data storage area for storing the result of the arithmetic processing and the data issued and outputted by the processor.

In the embodiment of the disclosure, the controller may determine whether each power supply circuit is normally connected to power according to the parameter value of the power supply detection device on each power supply circuit, so as to determine the connection state of the first connector and the second connector of each power supply circuit. The present disclosure is described below in connection with a charging control method, and is not described in detail herein.

According to the embodiment of the disclosure, for the charging circuit with multiple power supplies, the detection component is used for detecting the parameters of each power supply circuit, so that the on-off detection of each power supply circuit is realized, the current overload hidden trouble caused by the falling of the connector is avoided, and the charging safety is improved.

Fig. 2 illustrates a structure of a charge protection circuit in some embodiments of the present disclosure, and the charge protection circuit of the present disclosure is further described below with reference to fig. 2.

It should be noted that, in the example of fig. 2, the circuit board 100 and the battery module 200 are connected through two sets of connectors, that is, the circuit board 100 charges the battery module 200 through two paths of power supply circuits. In the example of fig. 2, for clarity, the power supply line is indicated by a solid line with an arrow, the arrow direction is the flow direction of the charging current, and the signal line is indicated by a broken line.

As shown in fig. 2, in some embodiments, the circuit board 100 includes a power terminal 110, and in one example, the power terminal 110 may be a Type-C charging interface provided at the bottom of the electronic device. The circuit board 100 is provided with 2 first connectors, namely a first connector a and a second connector b, the power end 110 is communicated with the first connector a through a first power supply circuit 121, and the power end 110 is connected with the first connector b through a second power supply circuit 122. Thus, a power supply circuit is formed by the power supply terminal 110, the first power supply circuit 121, and the first connector a, and a power supply circuit is formed by the power supply terminal 110, the second power supply circuit 122, and the first connector b, and the two power supply circuits are connected in parallel.

The first power supply circuit 121 and the second power supply circuit 122 are circuit modules for realizing charge correlation, and may include any circuit structure suitable for implementation, such as a BUCK circuit, a charge pump circuit, etc., which will be understood and fully implemented by those skilled in the art with reference to the related art, and will not be repeated in this disclosure.

The battery module 200 also includes 2 second connectors, namely a second connector a and a second connector b, the second connector a being snap-coupled with the first connector a, thereby forming one of the charging circuits from the power supply terminal 110 to the battery module 200. The second connector b is snap-coupled with the first connector b, thereby forming another charging circuit from the power terminal 110 to the battery module 200.

In the example of fig. 2, the detection component includes a precision resistor R1 disposed on the first power supply circuit 121, a precision resistor R2 disposed on the second power supply circuit 122, and a comparator 140, where the precision resistors R1 and R2 are voltage detection devices. The resistances of the resistor R1 and the resistor R2 are the same, and the resistance of the precision resistor is very small and is generally below 1 ohm, so that the precision resistor on the power supply circuit hardly affects the charging process, but the precision resistor has high sensitivity to current changes.

It will be appreciated that since the first power supply circuit 121 and the second power supply circuit 122 are parallel circuits, in an ideal state, the currents flowing through the resistor R1 and the resistor R2 should be the same or have a small difference, and as can be seen from the voltage formula u=ir, in the case that the currents I and the resistor R are the same, the voltages across the resistor R1 and the resistor R2 should also be the same or have a small difference. Under the condition that the first connector and the second connector of one power supply circuit fall off, the power supply circuit is disconnected, the current flowing through the resistor becomes zero at the moment, the voltage at the two ends of the resistor is also zero, and accordingly, the voltage of the resistor R1 and the voltage of the resistor R2 have larger difference, and the situation that the connectors fall off can be determined.

The input terminal of the comparator 140 is connected to each voltage detection device, and the output terminal is connected to the controller 130, and the comparator 140 is configured to obtain a voltage difference according to the voltage value of the voltage detection device obtained by the input terminal. For example, in the example of fig. 2, two input terminals of the comparator 140 are connected to the resistor R1 and the resistor R2, respectively, for obtaining voltages across the resistor R1 and the resistor R2, that is, the input of the comparator 140 is the voltage value V1 of the resistor R1 and the voltage value V2 of the resistor R2. The comparator 140 calculates a voltage difference (V1-V2) from the voltage values V1 and V2, and then transmits the voltage difference (V1-V2) to the controller 130. The controller 130 determines a connection state of the first connector and the second connector on each power supply circuit according to the voltage difference, and the principle of the controller 130 will be described in the present disclosure.

In some embodiments, the comparator 140 and the controller 130 may establish a communication connection through the I2C bus, such that the controller 130 may receive the voltage difference transmitted by the comparator 140.

According to the embodiment of the disclosure, for the charging circuit with multiple power supplies, the detection component is used for detecting the voltage of each power supply circuit, so that the on-off detection of each power supply circuit is realized, the current overload hidden trouble caused by the falling of the connector is avoided, and the charging safety is improved.

Fig. 3 illustrates a structure of a charge protection circuit in other embodiments of the present disclosure, and the charge protection circuit of the present disclosure is further described below with reference to fig. 3.

As shown in fig. 3, the present exemplary embodiment is different from the embodiment of fig. 2 in that in the embodiment of fig. 3, the detecting assembly includes a thermistor R3 disposed near the first connector a and a thermistor R4 disposed near the second connector b, respectively, and the thermistors R3 and R4 are heat detecting devices. The rest of the circuit structure is the same as the embodiment of fig. 2, and this disclosure will not be repeated.

It will be appreciated that since the first power supply circuit 121 and the second power supply circuit 122 are parallel circuits, the currents flowing through the first connector a and the first connector b should be identical or have small differences in an ideal state, according to the heating formula q=i ² Rt shows that, in the case where the current I, the resistance R, and the time t are the same, the amounts of heat detected by the thermistors R3 and R4 should be the same or have little difference. Under the condition that the first connector and the second connector of one power supply circuit fall off, the power supply circuit is broken, the current flowing through the first connector becomes zero at the moment, the heating is also zero, and therefore the heat values of the thermistors R3 and R4 have larger difference, and the situation that the connectors fall off can be determined.

Fig. 4 shows the structure of a charge protection circuit in other embodiments of the present disclosure, and the charge protection circuit of the present disclosure is further described below with reference to fig. 4.

As shown in fig. 4, the present exemplary embodiment is different from the embodiments of fig. 2 and 3 in that, in the embodiment of fig. 4, the detection assembly includes a temperature sensor D1 disposed near the first connector a and a temperature sensor D2 disposed near the second connector b, respectively, and the temperature sensors D1 and D2 are temperature detection devices. The rest of the circuit structure is the same as the embodiment of fig. 2 and 3, and this disclosure will not be repeated.

It will be appreciated that since the first power supply circuit 121 and the second power supply circuit 122 are parallel circuits, the currents flowing through the first connector a and the first connector b should be identical or have small differences in an ideal state, according to the heating formula q=i ² Rt shows that in the case of the same current I, impedance R and time t, the temperature sensors D1 and D2 detectThe temperature values should also be the same or close. Under the condition that the first connector and the second connector of one power supply circuit fall off, the power supply circuit is broken, the current flowing through the first connector becomes zero at the moment, the heating is also zero, and therefore the temperature values detected by the temperature sensors D1 and D2 have larger difference, and the situation that the connectors fall off can be determined.

In the embodiment of fig. 2-4, the voltage detection device, the heat detection device, and the temperature detection device may be implemented separately, while in other embodiments, any two of the voltage detection device, the heat detection device, and the temperature detection device may be implemented in combination, such as in one example a detection assembly comprising both the voltage detection device and the heat detection device, as described below in connection with the embodiment of fig. 5.

In the foregoing embodiment of fig. 2, the controller 130 determines the connection state of the circuit board 100 and the connector of the battery module 200 by the voltage difference of the resistors R1 and R2. However, it is contemplated that in some implementations, the power supply circuit may also need to supply power to the system while charging the battery module 200, resulting in currents from multiple parallel power supply circuits not necessarily being equal.

For example, as shown in fig. 2, the first power supply circuit 121 needs to supply a system power Vsys for supplying power to the system of the electronic device in addition to supplying power to the battery module 200 through the first connector a.

Since the first power supply circuit 121 has an additional power supply output, there is a certain current difference between the current output to the resistor R1 and the current output to the resistor R2 by the second power supply circuit 122, and a certain voltage difference exists between the collected voltage value V1 and the voltage value V2 due to the current difference, so the controller 130 may misjudge the voltage difference as the connector falling.

To further avoid the problem of misjudgment and improve the detection accuracy, in some embodiments of the present disclosure, the detection assembly further includes a heat detection device disposed near each first connector, and the heat detection device is used to detect a heat value of each first connector position, and by combining with the comparison of the heat values, the accuracy of connector falling detection is further improved, which is described below with reference to the embodiment of fig. 5.

As shown in fig. 5, in the example of the present disclosure, the heat detecting device is a thermistor R3 provided to the first connector a and a thermistor R4 provided to the first connector b. The thermistor R4 has excellent sensitivity to heat changes, so that the heat changes of the first connector a and the first connector b can be respectively collected.

It will be appreciated that in the case where the first power supply circuit 121 and the second power supply circuit 122 normally charge the battery module 200, a charging current flows through the first connector a and the first connector b, and since the first connector a and the first connector b themselves have a certain impedance, the battery module is charged according to the thermal formula q=i ² Rt it is known that in case of a consistent current I, impedance R and time t, the heat Q generated by the first connector a and the first connector b should be kept consistent or within a small range of differences. When one of the power supply circuits is disconnected, the current of the power supply circuit is zero, so that the heating value near the first connector is small, and the heating value near the first connector is large due to the increase of the current of the other power supply circuit, so that the connection state of the connectors can be well judged by utilizing the difference of the heat values of the two thermistors.

In the example of fig. 5, the thermistor R3 may collect the heat value Q1 near the first connector a, the thermistor R4 may collect the heat value Q2 near the first connector b, and then send the heat values Q1 and Q2 to the controller 130, and the controller 130 determines the connection state of the connectors according to the heat difference (Q1-Q2) between the heat values Q1 and Q2.

In some embodiments of the present disclosure, the controller 130 may first compare the voltage difference between the resistor R1 and the resistor R2, further compare the heat difference between the thermistor R3 and the thermistor R4 if the voltage difference is greater than a preset voltage threshold, and determine that there is a connector falling condition if the heat difference is greater than the preset heat threshold.

In the embodiment of the present disclosure, misjudgment caused by the output of the system power Vsys by the first power supply circuit 121 may be well avoided, for example, in an example, the current of the resistor R1 is pulled down due to a sudden increase of the system load, so that the controller 130 detects that the voltage difference between the resistor R1 and the resistor R2 is greater than the preset voltage threshold. At this time, the heat difference between the thermistor R3 and the thermistor R4 is further obtained, and since the first connector a and the first connector b are both normally connected with the second connector a and the second connector b, no falling occurs, and therefore the heat difference between the heat value Q1 and the heat value Q2 does not exceed the preset heat threshold, the connection state of the circuit board 100 and the connector of the battery module 200 can be determined to be the "non-falling state", and erroneous judgment is avoided.

In some embodiments, the thermistor R3 and the thermistor R4 may be communicatively coupled to the controller 130 via a GPIO (General Purpose Input/Output) bus.

As can be seen from the above, in the embodiment of the present disclosure, by combining the comprehensive judgment of the voltage difference and the heat quantity difference, the risk of misjudgment on the connection state of the connector due to abrupt change of the system load is reduced, the detection precision is further improved, and the charging safety is ensured.

The configuration of the charge protection circuit according to the embodiment of the present disclosure is described above, and the charge control method according to the embodiment of the present disclosure, which is applicable to an electronic device, is described below, and the foregoing processing is performed by the controller 130.

In the disclosed embodiments, the electronic device may be any device type suitable for implementation, such as a smart phone, a tablet computer, a wearable device, etc., and the electronic device includes the charging protection circuit in any of the foregoing embodiments.

As shown in fig. 6, in some embodiments, a charge control method of an example of the present disclosure includes:

s510, acquiring parameter values of power supply detection devices on each power supply circuit of the electronic equipment, wherein the power supply circuit supplies power to the battery module by the circuit board of the electronic equipment in the charging process of the electronic equipment.

In connection with the foregoing embodiments of fig. 2 to 5, after the power terminal 110 of the circuit board 100 is connected to an external power adapter, the battery module 200 of the electronic device can be charged. In the charging process, the charging current input from the power terminal 110 passes through a plurality of parallel power supply circuits and then reaches the battery module 200 to charge the battery module 200.

Taking the embodiment of fig. 2 as an example, the power supply terminal 110, the first power supply circuit 121, and the first connector a form one power supply circuit on the circuit board 100, and the power supply terminal 110, the second power supply circuit 122, and the first connector b form another power supply circuit on the circuit board 100, and the two power supply circuits are connected in parallel.

In the example of fig. 2, the power supply detection device is a voltage detection device, and the voltage detection device includes a precision resistor R1 provided on the first power supply circuit 121 and a precision resistor R2 provided on the second power supply circuit 122. Therefore, in the process of charging the battery module 200, the charging current passes through the resistor R1 and the resistor R2, and the voltage value V1 at two ends of the resistor R1 and the voltage value V2 at two ends of the resistor R2 can be detected.

Whereas in the example of fig. 3, the power supply detection device is a heat detection device including a thermistor R3 disposed near the first connector a, and a thermistor R4 disposed near the first connector b. Thus, during the charging of the battery module 200, the thermistors R3 and R4 may detect the heat value Q1 of the first connector a and the heat value Q2 of the first connector b.

S520, according to the difference of parameter values among the power supply detection devices, the connection state of each power supply circuit of the circuit board and the battery module is determined.

Still referring to the embodiment of fig. 2, the detecting component further includes a comparator 140, and the comparator 140 calculates a voltage difference (V1-V2) between the voltage value V1 of the resistor R1 and the voltage value V2 of the resistor R2, and then sends the voltage difference (V1-V2) to the controller 130.

It will be appreciated that in the case where the first connector a is normally connected to the second connector a and the first connector b is normally connected to the second connector b, the voltage difference (V1-V2) should be within a small difference range.

Accordingly, in the embodiment of the present disclosure, the preset voltage threshold Vthre under normal conditions may be set by means of a preliminary test. If the voltage difference (V1-V2). Ltoreq.Vthre, the voltage difference of the resistors R1 and R2 is within the normal range, thereby indicating that the connection states of the 2-group connectors are all "non-disconnection states", that is, normal connection states. If the voltage difference (V1-V2) > Vthre, it means that the voltage difference between the resistors R1 and R2 is within an abnormal range, thereby indicating that the connection state of one of the connectors is a "drop-off state". The principle and type of the heat detecting device illustrated in fig. 3 will not be described herein.

In the embodiment of fig. 5, the problem of erroneous judgment is further avoided, the detection accuracy is improved, and the connection state of the connector can be judged by using the voltage detection device in combination with the heat detection device, and the embodiment of fig. 7 is described below.

As shown in fig. 7, in some embodiments, a charge control method of an example of the present disclosure includes:

s610, acquiring a voltage value of a voltage detection device on each power supply circuit of the battery module supplied by a circuit board of the electronic equipment in the charging process of the electronic equipment.

In this example, as shown in fig. 5, considering that the heat detection has a certain hysteresis, the voltage values V1 and V2 of the voltage detection devices (resistors R1 and R2) are first detected during the charging process, and the process is the same as that of S510, and will not be repeated here.

S620, acquiring the heat value of the heat detection device arranged at the connection position of each power supply circuit and the battery module in response to the voltage difference of any two voltage detection devices being larger than a preset voltage threshold.

As shown in fig. 5, in this example, the detection assembly further includes a thermistor R3 disposed near the first connector a, and a thermistor R4 disposed near the first connector b, where the thermistors R3 and R4 are the heat detection devices according to the present disclosure.

In the case where it is determined through the foregoing process that the voltage difference (V1-V2) between the resistor R1 and the resistor R2 is greater than the preset voltage threshold Vthre, it is explained that it is possible that the connector of one of the power supply circuits is disconnected, or that the voltage difference (V1-V2) > Vthre is caused by abrupt change of the system load Vsys, and therefore, it is necessary to further acquire the heat values Q1 and Q2 of the thermistors R3 and R4.

And S630, determining that the connection state of at least one power supply circuit and the battery module is a falling state in response to the heat difference of the heat values of any two heat detection devices being larger than a preset heat threshold.

With continued reference to FIG. 2, in the event that the voltage difference (V1-V2) between resistor R1 and resistor R2 is determined to be greater than the preset voltage threshold Vthre, the thermal difference (Q1-Q2) between thermistors R3 and R4 is further calculated.

It will be appreciated that in the case where the first connector a is normally connected to the second connector a and the first connector b is normally connected to the second connector b, the heat difference (Q1-Q2) should be within a small difference range.

Thus, in the embodiments of the present disclosure, the preset heat threshold Qthre under normal conditions may be set by means of a preliminary test. If the difference in heat quantity (Q1-Q2). Ltoreq.Qthre, it means that the difference in heat quantity of the thermistors R3 and R4 is within the normal range, thereby indicating that the connection states of the 2 sets of connectors are all in the "non-disconnection state", i.e., the normal connection state, the previous fluctuation in voltage difference is caused by the abrupt change of the load power supply Vsys, and the connectors are not disconnected. If the difference in heat quantity (Q1-Q2) > Qthre, it means that the difference in heat quantity of the thermistors R3 and R4 is in an abnormal range, thereby indicating that the connection state of one of the connectors is a "disconnection state".

In addition, as can be appreciated by those skilled in the art, in the above examples of the disclosure, only the charging mode of the circuit board 100 and the battery module 200 by using 2 paths of power supply circuits is described, and for the scheme of the multi-path power supply circuit, only the voltage difference and the heat difference of any two paths of voltage detection devices and/or heat detection devices need to be compared in sequence, and the principle is similar to that described above, and the disclosure will not be repeated.

In some embodiments of the present disclosure, after determining that the connection state of at least one group of connectors is a disconnection state, in order to ensure charging safety, the interruption of the charging process may be controlled, and at the same time, an alarm may be issued to inform a user of a charging failure. For example, in one example, a prompt may be output on a display screen of the electronic device to display a "charging circuit failure, please repair process as soon as possible" to inform the user of the charging failure.

As shown in fig. 8, in some embodiments, the present disclosure provides a charging control device, which may be applied to the foregoing electronic apparatus, including:

the voltage detection module 10 is configured to obtain a parameter value of a power supply detection device of each power supply circuit of which the circuit board of the electronic equipment supplies power for the battery module in the charging process of the electronic equipment;

the state determining module 20 is configured to determine a connection state of each power supply circuit of the circuit board and the battery module according to a difference of parameter values between the power supply detecting devices.

In some embodiments, the state determination module 20 is configured to:

Acquiring a heat value of a heat detection device arranged at the connection position of each power supply circuit and the battery module in response to the existence of the voltage difference of any two voltage detection devices being greater than a preset voltage threshold;

In some embodiments, the state determination module 20 is configured to:

and/or the number of the groups of groups,

and determining that the connection state of each power supply circuit and the battery module is a non-falling state in response to the heat difference of the heat values of any two heat detection devices being smaller than or equal to a preset heat threshold.

In some embodiments, the disclosure provides an electronic device, which is an electronic device in any of the foregoing embodiments, and the electronic device includes the charge protection circuit in any of the foregoing embodiments. The controller of the charge protection circuit includes a processor and a memory, the memory storing computer instructions for causing the processor to perform the method of any of the foregoing embodiments.

In some embodiments, the present disclosure provides a storage medium storing computer instructions for causing a computer to perform the method of any of the preceding embodiments.

The structure of the electronic device in some embodiments of the present disclosure is shown in fig. 9, and the electronic device in some embodiments of the present disclosure is described below with reference to fig. 9.

Referring to fig. 9, the electronic device 1800 may include one or more of the following components: a processing component 1802, a memory 1804, a power component 1806, a multimedia component 1808, an audio component 1810, an input/output (I/O) interface 1812, a sensor component 1816, and a communication component 1818.

The processing component 1802 generally controls overall operation of the electronic device 1800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1802 may include one or more processors 1820 to execute instructions. Further, the processing component 1802 may include one or more modules that facilitate interactions between the processing component 1802 and other components. For example, the processing component 1802 may include a multimedia module to facilitate interaction between the multimedia component 1808 and the processing component 1802. As another example, the processing component 1802 may read executable instructions from a memory to implement electronic device-related functions.

The memory 1804 is configured to store various types of data to support operations at the electronic device 1800. Examples of such data include instructions for any application or method operating on the electronic device 1800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1804 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 assembly 1806 provides power to the various components of the electronic device 1800. The power components 1806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 1800.

The multimedia component 1808 includes a display screen between the electronic device 1800 and the user that provides an output interface. In some embodiments, the multimedia component 1808 includes a front-facing camera and/or a rear-facing camera. When the electronic device 1800 is in an operational mode, such as a shooting mode or a video mode, the front-facing camera and/or the rear-facing camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 1810 is configured to output and/or input audio signals. For example, the audio component 1810 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 1800 is in operating modes, such as a call mode, a recording mode, and a speech recognition mode. The received audio signals may be further stored in the memory 1804 or transmitted via the communication component 1818. In some embodiments, audio component 1810 also includes a speaker for outputting audio signals.

The I/O interface 1812 provides an interface between the processing component 1802 and a peripheral interface module, which may be a keyboard, click wheel, button, or the like. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 1816 includes one or more sensors for providing status assessment of various aspects of the electronic device 1800. For example, the sensor assembly 1816 may detect the on/off state of the electronic device 1800, the relative positioning of the components, such as the display and keypad of the electronic device 1800, the sensor assembly 1816 may also detect the change in position of the electronic device 1800 or a component of the electronic device 1800, the presence or absence of a user's contact with the electronic device 1800, the orientation or acceleration/deceleration of the electronic device 1800, and the change in temperature of the electronic device 1800. The sensor assembly 1816 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 1816 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 1816 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1818 is configured to facilitate communication between the electronic device 1800 and other devices, either wired or wireless. The electronic device 1800 may access a wireless network based on a communication standard, such as Wi-Fi,2G,3G,4G,5G, or 6G, or a combination thereof. In one exemplary embodiment, the communication component 1818 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 1818 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 electronic device 1800 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.

It should be apparent that the above embodiments are merely examples for clarity of illustration and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the present disclosure.

Claims

1. A charge protection circuit for use in an electronic device, the circuit comprising:

2. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,

the power supply detection device comprises a voltage detection device which is arranged on a connecting circuit between the power supply end and the first connector;

3. The circuit of claim 2, wherein the circuit further comprises a logic circuit,

the detection assembly further comprises a comparator, wherein the input end of the comparator is respectively connected with each voltage detection device, and the output end of the comparator is connected with the controller;

4. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,

the power supply detection device comprises a temperature detection device, and the temperature detection device is arranged close to the first connector;

5. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,

the power supply detection device comprises a heat detection device, and the heat detection device is arranged close to the first connector;

6. A circuit according to claim 2 or 3, wherein,

the power supply detection device further comprises a heat detection device, and the heat detection device is arranged close to the first connector;

7. A charge control method, characterized by being applied to an electronic device, the method comprising:

8. The method of claim 7, wherein the power supply detecting device includes a voltage detecting device and a heat detecting device, and the determining a connection state of each power supply circuit of the circuit board and the battery module according to a difference in parameter values between the respective power supply detecting devices includes:

9. The method as recited in claim 8, further comprising:

and/or the number of the groups of groups,

10. The method of claim 7, wherein the step of determining the position of the probe is performed,

the power supply detection device comprises one or more of a voltage detection device, a temperature detection device and a heat detection device.

11. A charge control apparatus, characterized by being applied to an electronic device, comprising:

12. An electronic device comprising the charge protection circuit according to any one of claims 1 to 5;

or alternatively, the process may be performed,

comprising a processor and a memory storing computer instructions for causing the processor to perform the method according to any one of claims 7 to 10.

13. A storage medium having stored thereon computer instructions for causing a computer to perform the method according to any one of claims 7 to 10.