CN221448124U - Battery control circuit and electronic equipment - Google Patents

Abstract

The present disclosure relates to a battery control circuit and an electronic device, wherein the battery control circuit includes: the device comprises a power supply end, a load end, a power management module and an identification module, wherein the power supply end is electrically connected with a battery; the identification module is connected between the battery and the power management module; the identification module controls the disconnection and connection of the battery and the load end according to the identified temperature of the battery. According to the battery overtemperature protection method and device, the identification module is added between the battery and the load end, so that the battery overtemperature state identification and the charge and discharge protection are realized, the charge and discharge protection of the battery overtemperature can be finished without depending on software, no software delay is caused to the overtemperature protection of the battery, and the overtemperature protection is effectively carried out on the battery.

Description

Battery control circuit and electronic equipment

Technical Field

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

Background

Electronic devices such as digital cameras, mobile phones, tablet computers, portable video and audio devices or bluetooth devices increasingly use batteries as internal power sources, and the batteries are easy to explode or damage due to the characteristics of the batteries as internal power sources, so that safety during charging and discharging must be considered.

Battery specifications require that charging and discharging must be performed within a prescribed temperature range, and when the battery temperature exceeds the prescribed range, charging and discharging of the battery is prohibited. Electronic devices are often equipped with power management circuitry that relies primarily on software to control the charge and discharge functions of the battery. However, the following disadvantages exist in the control of the charge and discharge functions of the battery by means of software: when the software operation fails, charging and discharging in a specified temperature range may not be completed; the software is operated with a certain time sequence and delay, and the battery is delayed from being over-temperature protected, so that the battery cannot be effectively over-temperature protected.

Disclosure of utility model

To overcome the problems in the related art, the present disclosure provides a battery control circuit and an electronic device.

According to a first aspect of embodiments of the present disclosure, there is provided a battery control circuit including: the power supply end is electrically connected with the battery; a load end; the power management module is connected with the load end and used for managing the charge and discharge of the battery; the identification module is connected between the battery and the power management module and is used for identifying the temperature of the battery; the identification module controls the disconnection and connection of the battery and the load end according to the identified temperature of the battery.

In some embodiments, the identification module comprises: the first module is connected with the battery and outputs a first electric signal after identifying the temperature of the battery; and the second module is connected between the first module and the power management module, and outputs a control signal according to the first electric signal, and the control signal controls the disconnection and connection of the battery and the load end.

In some embodiments, the identification module further comprises: and the third module is connected between the battery and the power management module and is controlled to be switched on and switched off according to the control signal.

In some embodiments, the first module comprises: the first branch circuit is provided with a first resistor and a second resistor which are positioned at two sides of the sampling point; the second branch circuit is provided with a third resistor and a fourth resistor which are positioned at two sides of the sampling point; the third branch circuit is provided with a fifth resistor and a sixth resistor which are positioned at two sides of the sampling point; the first branch, the second branch and the third branch are arranged in parallel.

In some embodiments, the first resistor, the third resistor and the fifth resistor have the same resistance, the second resistor and the fourth resistor have different resistances, and the sixth resistor is a temperature sensitive resistor.

In some embodiments, the first module further comprises: the first input end of the first operational amplifier is connected with the third branch, the second input end of the first operational amplifier is connected with the first branch, and the output end of the first operational amplifier is connected with the second module; and the first input end of the second operational amplifier is connected with the second branch, the second input end of the second operational amplifier is connected with the third branch, and the output end of the second operational amplifier is connected with the second module.

In some embodiments, the power management module is coupled to the first module, the second module, and the third module.

In some embodiments, the second module is a logic gate circuit, or the second module is a logic gate integrated chip.

In some embodiments, the second module comprises: the first switch and the second switch are arranged in parallel, one end of the first switch is connected with the output end of the first operational amplifier, and one end of the second switch is connected with the output end of the second operational amplifier; and the other end of the first switch is connected with the same end of the second switch, and the other end of the third switch is a control signal output end.

In some embodiments, the third module comprises: the switch unit is connected with the control signal output end, is connected between the power management module and the battery, and is disconnected when the control signal output end outputs a first control signal, and the battery is disconnected with the load end; when the control signal output end outputs a second control signal, the switch unit is conducted, and the battery is conducted with the load end.

In some embodiments, the power management module comprises: the first chip is connected with the switch unit and is used for generating a first power supply signal; and the second chip is connected between the first chip and the load end, the second chip is connected with the first module and the second module, and the second chip generates a second power signal according to the first power signal to supply power for the first module and the second module.

In some embodiments, the first chip has a charging interface, and the first chip generates the first power signal by a charging voltage of the charging interface, or the first chip generates the first power signal according to an output signal of the switching unit.

According to a first aspect of embodiments of the present disclosure, there is provided an electronic device, comprising: the battery control circuit as in any one of the embodiments of the first aspect described above.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the present disclosure provides a battery control circuit, a power management module is connected with a load end, the power management module manages charge and discharge of a battery, and an identification module is connected between the battery and the power management module; the identification module is used for identifying the temperature of the battery, and the identification module controls the disconnection and connection of the battery and the load end according to the identified temperature of the battery. According to the battery overtemperature protection method and device, the identification module is added between the battery and the load end, so that the battery overtemperature state identification and the charge and discharge protection are realized, the charge and discharge protection of the battery overtemperature can be finished without depending on software, no software delay is caused to the overtemperature protection of the battery, and the overtemperature protection is effectively carried out on the battery.

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 battery control circuit in the related art.

Fig. 2 is a block diagram illustrating a battery control circuit according to an exemplary embodiment.

Fig. 3 is a schematic diagram showing a structure of a battery control circuit according to an exemplary embodiment.

Fig. 4 is a circuit diagram of a first module shown according to an exemplary embodiment.

Fig. 5 is a circuit diagram of a second module shown according to an exemplary embodiment.

Fig. 6 is a circuit diagram of a third module shown according to an exemplary embodiment.

Fig. 7 is a circuit diagram of a first chip in a power management module, according to an example embodiment.

Fig. 8 is a circuit diagram of a second chip in a power management module, according to an example embodiment.

Reference numerals:

1. A resistor voltage dividing circuit; 2. a main chip; 3. an analog-to-digital conversion module; 4. a power management circuit;

10. A battery; 20. a load end; 30. a power management module; 40. an identification module; 41. a first module; 42. a second module; 43. a third module; 401. a first branch; 402. a second branch; 403. a third branch; 404. a first operational amplifier; 405. a second operational amplifier; 50. an external power source.

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 and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the related technology, a temperature-sensitive resistor is arranged in the battery, and the resistance value of the temperature-sensitive resistor changes along with the change of the temperature of the battery; as shown in fig. 1, in the electronic device, a temperature sensitive resistor of a battery 10 is connected to a resistor voltage dividing circuit 1, so that a battery temperature signal is converted into a voltage signal; an Analog-to-Digital Converter (ADC) module of the main chip 2 collects the voltage signal, and calculates the real-time temperature of the battery 10 through a conversion formula in software; the software then performs corresponding charge and discharge control through the power management circuit 4 according to the battery temperature.

The scheme has the following defects that the charge and discharge functions of the battery are controlled by software: when the software operation fails, charging and discharging in a specified temperature range may not be completed; the software is operated with a certain time sequence and delay, and the battery is delayed from being over-temperature protected, so that the battery cannot be effectively over-temperature protected.

In order to solve the above technical problems, the present disclosure provides a battery control circuit, as shown in fig. 2-3, including: a power supply terminal electrically connected to the battery 10, a load terminal 20, a power management module 30, and an identification module 40.

The power management module 30 is connected with the load end 20, and the power management module 30 manages the charge and discharge of the battery 10; the identification module 40 is connected between the battery 10 and the power management module 30, and the identification module 40 is used for identifying the temperature of the battery 10; the identification module 40 controls the opening and closing of the battery 10 and the load terminal 20 according to the identified temperature of the battery 10.

The battery 10 is used as an internal power source of the electronic device, the battery 10 can supply power to the load terminal 20 through discharging, and the external power source 50 can charge the battery 10 or charge the load terminal 20.

The power management module 30 is configured to manage charge and discharge of the battery 10, and the load terminal 20 applies a control signal to the power management module 30, and controls charge and discharge of the battery 10 through the power management module 30.

The identification module 40 converts the battery temperature into a voltage signal, identifies whether the battery 10 temperature exceeds a preset temperature range, and controls the disconnection and connection of the battery 10 and the load terminal 20 according to the identified battery 10 temperature.

When the battery 10 exceeds a preset temperature range when the load end 20 is powered by the battery 10, the identification module 40 controls the battery 10 to be disconnected from the load end 20, so that discharge protection when the battery 10 is over-temperature is realized.

When the battery 10 exceeds the preset temperature range, the external power supply 50 is connected to power up the load end 20, but the battery 10 is still disconnected from the load end 20, and the external power supply 50 cannot charge the battery 10, so that the charge protection after the battery is over-temperature is realized.

In the normal charging process of the external power supply 50, the external power supply 50 supplies power to the load end 20 and charges the battery 10 at the same time, when the identification module 40 identifies that the battery 10 exceeds the preset temperature range, the identification module 40 controls the battery 10 to be disconnected from the load end 20, and charging is stopped, so that charging protection when the battery is over-temperature in the charging process is realized.

After the battery 10 is disconnected from the load end 20 due to overtemperature, if the temperature of the battery falls within a preset temperature range, the load end 20 is electrified after an external power supply is connected, and the battery 10 is connected with the load end 20 and can be normally charged; after the external power source is removed, the load terminal 20 is powered by the battery 10 to maintain normal operation, and thus the battery temperature keeping state is exited.

According to the battery overtemperature protection method, the identification module 40 is added between the battery 10 and the load end 20, so that the battery overtemperature state identification and the charge and discharge protection are realized, the charge and discharge protection of the battery overtemperature can be completed without depending on software, no software delay exists in the overtemperature protection of the battery, the battery is effectively overtemperature protected, meanwhile, the battery 10 can be completely powered off, and the battery discharge caused by no software operation in the protection state is ensured.

In some embodiments, as shown in fig. 3, the identification module 40 includes: a first module 41 and a second module 42.

The first module 41 is connected to the battery 10, and the first module 41 recognizes the temperature of the battery 10 and outputs a first electric signal; the second module 42 is connected between the first module 41 and the power management module 30, and the second module 42 outputs a control signal according to the first electrical signal, wherein the control signal controls the battery 10 to be disconnected from or connected to the load terminal 20.

The first module 41 is configured to convert the temperature of the battery 10 into an electrical signal, for example, convert the temperature of the battery 10 into a voltage signal, identify whether the temperature exceeds a preset temperature range, and output a first electrical signal.

The second module 42 is configured to output a control signal according to the first electrical signal to control the battery 10 to be disconnected from and connected to the load terminal 20.

In the embodiment of the disclosure, the temperature of the battery 10 is identified through the first module 41, and the logic of the second module 42 realizes the identification of the overtemperature state and the charge-discharge protection of the battery, so that the charge-discharge protection of the overtemperature of the battery can be completed without depending on software, no software delay is caused to the overtemperature protection of the battery, and the overtemperature protection of the battery is effectively performed.

In some embodiments, as shown in fig. 3, the identification module 40 further includes: the third module 43, the third module 43 is connected between the battery 10 and the power management module 30, and the third module 43 is controlled to be turned on and off according to the control signal.

In the embodiment of the present disclosure, the control signal may be at a high level, and the third module 43 is controlled to be turned on according to the high level, so that the battery 10 is turned on with the load terminal 20, the battery 10 may supply power to the load terminal 20, and the load terminal 20 may also charge the battery 10; the control signal may be at a low level, and the third module 43 is controlled to be turned on according to the low level, so that the battery 10 is disconnected from the load terminal 20, and the battery 10 stops charging and discharging.

In some embodiments, as shown in fig. 4, the first module 41 includes: a first leg 401, a second leg 402, and a third leg 403.

The first branch 401 has a first resistor R4 and a second resistor R5 located at two sides of the sampling point; the second branch 402 has a third resistor R2 and a fourth resistor R3 located at two sides of the sampling point; the third branch 403 has a fifth resistor R1 and a sixth resistor Rt located at two sides of the sampling point; the first branch 401, the second branch 402 and the third branch 403 are arranged in parallel.

The sixth resistor Rt is a temperature sensitive resistor inside the battery 10, typically an NTC resistor, that is, a negative temperature coefficient thermistor (NTC thermistor, negative Temperature Coefficient thermistor), and its resistance value decreases with an increase in temperature.

The first resistor R4, the third resistor R2 and the fifth resistor R1 are voltage dividing resistors, the second resistor R5 corresponds to the resistance value of the sixth resistor Rt when the battery operating temperature is lower than the lower limit Tmin, and the fourth resistor R3 corresponds to the resistance value of the sixth resistor Rt when the battery operating temperature is upper than the upper limit Tmax.

Illustratively, the first resistor R4, the third resistor R2, and the fifth resistor R1 have the same resistance, the second resistor R5 and the fourth resistor R3 have different resistances, and the sixth resistor Rt is a temperature-sensitive resistor.

In the embodiment of the present disclosure, the temperature of the battery 10 is converted into a voltage signal through the first branch 401, the second branch 402 and the third branch 403 which are arranged in parallel, and whether the temperature exceeds the preset temperature range is identified, and the preset temperature range can be changed by setting the circuit parameters, so that the application range is wide.

In some embodiments, as shown in fig. 4, the first module 41 further includes: a first operational amplifier 404 and a second operational amplifier 405.

A first input terminal of the first operational amplifier 404 is connected to the third branch 403, a second input terminal of the first operational amplifier 404 is connected to the first branch 401, and an output terminal V1 of the first operational amplifier 404 is connected to the second module 42; a first input of the second operational amplifier 405 is connected to the second branch 402, a second input of the second operational amplifier 405 is connected to the third branch 403, and an output V2 of the second operational amplifier 405 is connected to the second module 42.

The first input terminal of the first operational amplifier 404 may be a positive terminal of the first operational amplifier 404, the second input terminal of the first operational amplifier 404 may be a negative terminal of the first operational amplifier 404, and the output is high when the positive terminal input voltage v+ of the first operational amplifier 404 is greater than the negative terminal input voltage V-, and the output is low when the positive terminal input voltage v+ of the first operational amplifier 404 is less than the negative terminal input voltage V-.

The first input terminal of the second operational amplifier 405 may be a positive terminal of the second operational amplifier 405, the second input terminal of the second operational amplifier 405 may be a negative terminal of the second operational amplifier 405, and the output is high when the positive terminal input voltage v+ of the second operational amplifier 405 is greater than the negative terminal input voltage V-, and the output is low when the positive terminal input voltage v+ of the second operational amplifier 405 is less than the negative terminal input voltage V-.

Referring to fig. 4, when the temperature T of the battery 10 is between the battery operation temperature lower limit Tmin and the battery operation temperature upper limit Tmax, i.e., tmin < T < Tmax, at which time R3< Rt < R5, the input v1+ < V1-of the first operational amplifier 404 and the input v2+ < V2-of the second operational amplifier 405 are both low level, so that the outputs V1 and V2 of the first operational amplifier 404 and the second operational amplifier 405 are both low level.

When the temperature T of the battery 10 is less than the battery operation temperature lower limit Tmin, i.e., T < Tmin, at this time Rt > R5> R3, the input V1+ > V1-of the first operational amplifier 404, the input V2+ < V2-of the second operational amplifier 405, the output V1 of the first operational amplifier 404 is high, and the output V2 of the second operational amplifier 405 is low.

When the temperature T of the battery 10 is greater than the battery operation temperature upper limit Tmax, i.e., T > Tmax, rt < R3< R5, the first operational amplifier 404 output V1 is low, and the second operational amplifier 405 output V2 is high.

In some embodiments, as shown in fig. 3, the power management module 30 is connected with a first module 41, a second module 42, and a third module 43.

In the embodiment of the present disclosure, the power management module 30 supplies power to the first, second and third modules 41, 42 and 43 and is used to manage charge and discharge of the battery 10 to maintain the off or on state of the third module 43.

In some embodiments, the second module 42 is a logic gate circuit, or the second module 42 is a logic gate integrated chip.

The logic gate circuit may be a nor gate circuit, and the logic gate integrated chip may be a nor gate integrated chip.

In the embodiment of the present disclosure, the output V1 of the first operational amplifier 404 and the output V2 of the second operational amplifier 405 generate control signals through a logic gate circuit or a logic gate integrated chip, and the third module 43 is controlled to be turned off and on according to the control signals.

Illustratively, as shown in FIG. 5, the second module 42 includes: a first switch D1 and a second switch D2 arranged in parallel, one end of the first switch D1 is connected to the output terminal V1 of the first operational amplifier 404, and one end of the second switch D2 is connected to the output terminal V2 of the second operational amplifier 405; and the other end of the first switch D1 is connected with the other end of the second switch D2 and the same end of the third switch Q1, and the other end of the third switch Q1 is the output end of the control signal VBAT_EN.

The first switch D1 may be a semiconductor diode, the second switch D2 may be a semiconductor diode, and the third switch Q1 may be a MOS transistor.

In the embodiment of the disclosure, when the output terminal V1 of the first operational amplifier 404 and the output terminal V2 of the second operational amplifier 405 are both at the low level, neither the first switch D1 nor the second switch D2 is turned on, the third switch Q1 is turned off, and the control signal vbat_en is at the high level, so that the third module 43 is turned on, and the battery 10 is further connected to the load terminal 20.

When the output terminal V1 of the first operational amplifier 404 is at a high level and the output terminal V2 of the second operational amplifier 405 is at a low level, the first switch D1 is turned on, the second switch D2 is turned off, the third switch Q1 is turned on, and the control signal vbat_en is at a low level, so that the third module 43 is turned off, and the battery 10 is further turned off from the load terminal 20.

When the output terminal V1 of the first operational amplifier 404 is at a low level and the output terminal V2 of the second operational amplifier 405 is at a high level, the first switch D1 is turned off, the second switch D2 is turned on, the third switch Q1 is turned on, and the control signal vbat_en is at a low level, so that the third module 43 is turned off, and the battery 10 is further turned off from the load terminal 20.

In some embodiments, as shown in fig. 6, the third module 43 includes: the switching unit U3, one end of the switching unit U3 is connected with the output end of the control signal VBAT_EN, the switching unit U3 is connected between the power management module 30 and the battery 10, and when the control signal VBAT_EN output end outputs a first control signal, the switching unit U3 is disconnected, and the battery 10 is disconnected from the load end 20; when the control signal vbat_en outputs the second control signal, the switching unit U3 is turned on, and the battery 10 is turned on with the load terminal 20.

The input of the switching unit U3 is connected to the positive pole vbat_con of the battery 10, and the output signal VBAT of the switching unit U3 supplies power to the load terminal 20. The first control signal may be low and the second control signal may be high.

For example, when the battery temperature is within the preset temperature range, the output terminal of the control signal vbat_en outputs a second control signal, i.e. vbat_en is at a high level, the switch unit U3 is turned on, the battery 10 is turned on with the load terminal 20, the battery 10 supplies power to the load terminal 20, and the load terminal 20 can also charge the battery 10;

When the battery temperature exceeds the preset temperature range, the output end of the control signal vbat_en outputs a first control signal, that is, vbat_en is at a low level, the switching unit U3 is turned off, the battery 10 is turned off from the load end 20, and the battery 10 stops charging and discharging.

In some embodiments, as shown in fig. 6-8, the power management module 30 includes: the first chip U4 and the second chip U5. The first chip U4 is connected with the switch unit U3, and the first chip U4 is used for generating a first power supply signal VSYS; the second chip U5 is connected between the first chip U4 and the load end 20, the second chip U5 is connected with the first module 41 and the second module 42, and the second chip U5 generates a second power signal VDD according to the first power signal VSYS to supply power to the first module 41 and the second module 42.

The first chip U4 may be a power management chip, and the second chip U5 may be a power chip.

When the battery 10 exceeds the preset temperature range, the control signal vbat_en is at a low level, the switch unit U3 is turned off, and the identification module 40 controls the battery 10 to be turned off from the load terminal 20, so that discharge protection is realized when the battery 10 is over-temperature.

When the battery 10 exceeds the preset temperature range, the external power supply 50 is connected, the first chip U4 generates the first power supply signal VSYS, so that the load terminal 20 is powered on, but the battery 10 exceeds the preset temperature range, so that the control signal vbat_en is low level and still disconnected from the load terminal 20, the external power supply 50 cannot charge the battery 10, and the charge protection after the battery is over-temperature is realized.

In some embodiments, as shown in fig. 7-8, the first chip U4 has a charging interface, and the first chip U4 generates the first power signal VSYS by a charging voltage of the charging interface, or the first chip U4 generates the first power signal VSYS according to the output signal VBAT of the switching unit U3.

In the embodiment of the disclosure, during normal charging of the external power supply 50, the access terminal VBUS of the external power supply 50 generates the first power supply signal VSYS via the first chip U4, the external power supply 50 supplies power to the load terminal 20 and charges the battery 10 at the same time, when the identification module 40 identifies that the battery 10 exceeds the preset temperature range, the control signal vbat_en is at a low level, the switch unit U3 is turned off, the identification module 40 controls the battery 10 to be turned off from the load terminal 20, and charging is stopped, thereby realizing charging protection when the battery exceeds temperature in the charging process.

After the battery 10 is disconnected from the load end 20 due to overtemperature, if the battery temperature falls within a preset temperature range, after the external power supply 50 is connected, the access end VBUS of the external power supply 50 generates a first power supply signal VSYS through the first chip U4, the load end 20 is electrified, the control signal VBAT_EN is in a high level, the switch unit U3 is conducted, and the battery 10 is connected with the load end 20 and can be normally charged; after the external power supply 50 is removed, the output signal VBAT of the switch unit U3 generates the first power signal VSYS through the first chip U4, the control signal vbat_en keeps at a high level, the switch unit U3 keeps on, and the load terminal 20 is powered by the battery 10 to maintain normal operation, so that the battery temperature-keeping state is exited.

Based on the same inventive concept, the present disclosure also provides an electronic device including: the battery control circuit of any of the above embodiments.

The electronic device may be a camera, a mobile phone, a tablet computer, a portable video device, a bluetooth device, or the like, which uses a battery as an internal power source.

According to the battery overtemperature protection method, the identification module 40 is added between the battery 10 and the load end 20, so that the battery overtemperature state identification and the charge and discharge protection are realized, the charge and discharge protection of the battery overtemperature can be finished without depending on software, no software delay is caused to the overtemperature protection of the battery, and the overtemperature protection is effectively carried out on the battery.

It is understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "center," "longitudinal," "transverse," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation.

It will be further understood that "connected" includes both direct connection where no other member is present and indirect connection where other element is present, unless specifically stated otherwise.

It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.

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 application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the 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 scope of the appended claims.

Claims (12)

1. A battery control circuit, characterized in that the battery control circuit comprises:

The power supply end is electrically connected with the battery;

A load end;

The power management module is connected with the load end and used for managing the charge and discharge of the battery; and

The identification module is connected between the battery and the power management module and is used for identifying the temperature of the battery;

The identification module controls the disconnection and connection of the battery and the load end according to the identified temperature of the battery.

2. The battery control circuit of claim 1, wherein the identification module comprises:

The first module is connected with the battery and outputs a first electric signal after identifying the temperature of the battery; and

The second module is connected between the first module and the power management module, and outputs a control signal according to the first electric signal, and the control signal controls the disconnection and connection of the battery and the load end.

3. The battery control circuit of claim 2, wherein the identification module further comprises:

and the third module is connected between the battery and the power management module and is controlled to be switched on and switched off according to the control signal.

4. The battery control circuit of claim 3, wherein the first module comprises:

the first branch circuit is provided with a first resistor and a second resistor which are positioned at two sides of the sampling point;

The second branch circuit is provided with a third resistor and a fourth resistor which are positioned at two sides of the sampling point; and

The third branch circuit is provided with a fifth resistor and a sixth resistor which are positioned at two sides of the sampling point;

The first branch, the second branch and the third branch are arranged in parallel.

5. The battery control circuit of claim 4, wherein,

The resistances of the first resistor, the third resistor and the fifth resistor are the same, the resistances of the second resistor and the fourth resistor are different, and the sixth resistor is a temperature-sensitive resistor.

6. The battery control circuit of claim 5, wherein the first module further comprises:

The first input end of the first operational amplifier is connected with the third branch, the second input end of the first operational amplifier is connected with the first branch, and the output end of the first operational amplifier is connected with the second module; and

The first input end of the second operational amplifier is connected with the second branch, the second input end of the second operational amplifier is connected with the third branch, and the output end of the second operational amplifier is connected with the second module.

7. The battery control circuit of claim 2, wherein,

The second module is a logic gate circuit or a logic gate integrated chip.

8. The battery control circuit of claim 6, wherein the second module comprises:

The first switch and the second switch are arranged in parallel, one end of the first switch is connected with the output end of the first operational amplifier, and one end of the second switch is connected with the output end of the second operational amplifier; and

The other end of the first switch is connected with the same end of the second switch, and the other end of the third switch is a control signal output end.

9. The battery control circuit of claim 8, wherein the third module comprises:

One end of the switch unit is connected with the control signal output end, the switch unit is connected between the power management module and the battery,

When the control signal output end outputs a first control signal, the switch unit is disconnected, and the battery is disconnected from the load end;

When the control signal output end outputs a second control signal, the switch unit is conducted, and the battery is conducted with the load end.

10. The battery control circuit of claim 9, wherein the power management module comprises:

The first chip is connected with the switch unit and is used for generating a first power supply signal; and

The second chip is connected between the first chip and the load end, the second chip is connected with the first module and the second module, and the second chip generates a second power signal according to the first power signal to supply power for the first module and the second module.

11. The battery control circuit of claim 10 wherein the battery control circuit comprises a battery control circuit,

The first chip has a charging interface, and generates the first power signal by a charging voltage of the charging interface, or

The first chip generates the first power supply signal according to the output signal of the switch unit.

12. An electronic device, comprising: the battery control circuit of any one of claims 1-11.