CN114268153A

CN114268153A - Charging control circuit, charging control method, charging control device, and storage medium

Info

Publication number: CN114268153A
Application number: CN202111615553.4A
Authority: CN
Inventors: 陶云杰; 魏运锋
Original assignee: Guangzhou Stars Pulse Co Ltd
Current assignee: Guangzhou Stars Pulse Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-01
Anticipated expiration: 2041-12-24
Also published as: CN114268153B

Abstract

The application discloses a charging control circuit, a charging control method, a charging control device and a storage medium, and belongs to the technical field of circuits. The charging control circuit comprises a controller, a charging adjusting circuit and a charging management chip; the controller comprises a first input end, a first output end and a second input end, and the charging management chip comprises a current setting end, a battery connecting end and a temperature detection end; the controller is electrically connected with the input end of the charging adjusting circuit through the first output end, the output end of the charging adjusting circuit is electrically connected with the current setting end of the charging management chip, and the controller is also electrically connected with the battery connecting end of the charging management chip through the first input end; the battery connecting end of the charging management chip is also electrically connected with the anode of the battery. The charging current can be adjusted in real time, the management capacity of the charging current is improved in the charging process, the stability of the charging process is improved, the battery is protected, and the charging safety is improved.

Description

Charging control circuit, charging control method, charging control device, and storage medium

Technical Field

The present disclosure relates to the field of battery charging technologies, and in particular, to a charging control circuit, a charging control method, a charging control device, and a storage medium.

Background

With the continuous development of scientific technology, people use more and more types of terminals in real life, wherein lithium batteries are used as power supplies in various terminals due to the characteristics of quick charging, small quality and the like of the lithium batteries.

At present, most lithium batteries can be charged, and the charging process of the lithium batteries is generally divided into three stages of trickle, constant current and constant voltage. Because the lithium battery is a temperature sensitive device, in the charging process, the charging current required in the charging process is different due to the change of the temperature of the battery, and in the charging process, if the temperature of the battery is too high, the phenomena of burning, damage and the like are easy to occur, so that the charging process of the lithium battery is unsafe, and the charging mode is single.

Disclosure of Invention

The embodiment of the application provides a charging control circuit, a charging control method, a charging control device and a storage medium, which can adjust charging current for charging a battery according to the current battery temperature and improve the charging safety and diversity.

In one aspect, an embodiment of the present application provides a charging control circuit, where the charging control circuit includes a controller, a charging adjustment circuit, and a charging management chip;

the controller comprises a first input end, a first output end and a second input end, and the charging management chip comprises a current setting end, a battery connecting end and a temperature detection end;

the controller is electrically connected with the input end of the charging adjusting circuit through the first output end, the output end of the charging adjusting circuit is electrically connected with the current setting end of the charging management chip, the controller is also electrically connected with the battery connecting end of the charging management chip through the first input end, and the controller is also electrically connected with the temperature detection end of the charging management chip through the second input end;

the battery connecting end of the charging management chip is also electrically connected with the anode of the battery;

the controller is used for acquiring the current voltage of the battery from the first input end and acquiring the current battery temperature of the battery from the second input end in the charging process; determining a first control signal output through the first output end according to the current battery temperature and the current voltage;

the charging adjusting circuit is used for receiving the first control signal output by the controller through the first output end and adjusting the impedance of the current setting end according to the first control signal;

the charging management chip is used for adjusting charging current according to the impedance detected by the current setting end and outputting the charging current through the battery connecting end.

Optionally, the charging adjustment circuit includes a voltage stabilizing circuit and a resistor circuit; the voltage stabilizing circuit is electrically connected with the resistor circuit, the controller is electrically connected with the resistor circuit, and the resistor circuit is also electrically connected with the current setting end of the charging management chip;

the voltage stabilizing circuit is used for providing fixed voltage for the current setting end, receiving the first control signal and adjusting the impedance of the resistance circuit connected to the current setting end according to the first control signal.

Optionally, the resistor circuit includes a first voltage dividing resistor, a second voltage dividing resistor and a ground resistor; the first voltage-dividing resistor comprises a first connecting end and a second connecting end, the second voltage-dividing resistor comprises a third connecting end and a fourth connecting end, and the grounding resistor comprises a fifth connecting end and a sixth connecting end;

the first connection end of the first divider resistor is electrically connected with the first output end of the controller;

the second connecting end of the first voltage-dividing resistor is electrically connected with the third connecting end of the second voltage-dividing resistor, one end of the voltage stabilizing circuit is electrically connected between the second connecting end and the third connecting end, and the other end of the voltage stabilizing circuit is grounded;

a fourth connecting end of the second voltage-dividing resistor is electrically connected with a current setting end of the charging management chip, and the grounding resistor is electrically connected between the fourth connecting end and the current setting end through the fifth connecting end;

the grounding resistor is grounded through the sixth connecting end.

Optionally, the first control signal is any one of a high-impedance signal, a high-level signal or a low-level signal;

the voltage stabilizing circuit is further used for adjusting the impedance of the current setting end to be the ground resistance when the first control signal output by the controller through the first output end is the high-resistance state signal;

the voltage stabilizing circuit is further used for providing fixed voltage for the current setting end and adjusting the impedance of the current setting end to be the grounding resistance when receiving that a first control signal output by the controller through the first output end is the high level signal;

the voltage stabilizing circuit is further configured to adjust the impedance of the current setting end to be a target parallel resistor when receiving that a first control signal output by the controller through the first output end is the low level signal, where the target parallel resistor is an equivalent resistor formed by connecting the first voltage dividing resistor and the second voltage dividing resistor in series and then connecting the first voltage dividing resistor and the second voltage dividing resistor in parallel with the ground resistor.

Optionally, the voltage stabilizing circuit includes a voltage regulator tube, a capacitor device and a resistor device;

the voltage-stabilizing tube is connected with the capacitor device in parallel, and the voltage-stabilizing tube is connected with the resistor device in parallel; the capacitance device is connected in parallel with the resistance device;

the voltage stabilizing circuit is further configured to adjust a voltage dividing value of the resistor device when receiving that a first control signal output by the controller through the first output terminal is the high level signal, so as to adjust a fixed voltage provided to the current setting terminal and adjust an impedance of the current setting terminal to be the ground resistance.

Optionally, the controller further includes a second input end, the charge control circuit further includes a temperature detection circuit, and the charge management chip further includes a temperature detection end;

the second input end is electrically connected with the temperature detection circuit, and the temperature detection circuit is also electrically connected with the temperature detection end;

the controller is used for acquiring the voltage value of the temperature detection circuit through the second input end and acquiring the current battery temperature according to the voltage value of the temperature detection circuit.

Optionally, the controller further includes a second output end, the charging management chip further includes an enable end, and the controller is further electrically connected to the enable end of the charging management chip through the second output end;

the controller is further configured to determine a second control signal output through the second output terminal according to the current battery temperature before determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage, where the second control signal is a high level signal or a low level signal;

the controller is further configured to perform the step of determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage when the second control signal output through the second output terminal is the high level signal;

the charging management chip is further configured to receive the second control signal through the enable terminal, adjust the enable terminal to be in an on state when the second control signal is the high level signal, so that the charging management chip charges the battery through the battery connection terminal, and adjust the enable terminal to be in an off state when the second control signal is the low level signal, so that the charging management chip stops charging the battery through the battery connection terminal.

Optionally, the charging control circuit further includes a charging enable circuit, and an output end of the charging enable circuit is electrically connected to an enable end of the charging management chip;

the charging enabling circuit is used for inputting working voltage to the charging management chip when the enabling end of the charging management chip is in the starting state, so that the charging management chip works.

Optionally, the controller is further configured to determine a temperature range of the current battery temperature according to the current battery temperature before determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage, and when the temperature range is within a preset temperature range, the second control signal is the high-level signal to control the charging management chip to charge the battery; and when the temperature range is not within the preset temperature range, the second control signal is the low level signal, and the charging management chip is controlled to stop charging the battery.

Optionally, the charging control circuit further includes a filter circuit, the filter circuit includes at least two capacitor devices connected in parallel, and the filter circuit is connected between the battery connection end and the positive electrode of the battery;

the filter circuit is used for filtering the charging current output by the charging management chip.

Optionally, the charging control circuit further includes a battery status indication circuit, and the charging management chip further includes a completion indication terminal and a charging indication terminal;

the battery state indicating circuit is electrically connected with the completion indicating terminal and the charging indicating terminal respectively;

the battery state indicating circuit is used for acquiring the charging state of the battery through the completion indicating terminal and the charging indicating terminal.

In another aspect, an embodiment of the present application provides a charging control method, where the method is used for a charging control circuit, where the charging control circuit includes a controller, a charging adjustment circuit, and a charging management chip; the method comprises the following steps:

acquiring the current battery temperature and the current voltage of the battery in the charging process;

generating a first control signal according to the current battery temperature and the current voltage, so that the charging adjustment circuit adjusts the impedance of the current setting end of the charging management chip according to the first control signal; and enabling the charging management chip to adjust the charging current according to the impedance detected by the current setting end.

generating a first control signal according to the current battery temperature and the current voltage includes:

when the current battery temperature is in a first temperature range and the current voltage is smaller than a first voltage threshold value, generating the high-resistance state signal;

when the current battery temperature is in a first temperature range and the current voltage is not less than the first voltage threshold, generating the low-level signal;

when the current battery temperature is in a second temperature range and the current voltage is smaller than the first voltage threshold, generating the high-resistance state signal;

when the current battery temperature is in a second temperature range and the current voltage is not less than the first voltage threshold, generating the high-level signal.

Optionally, the charging adjustment circuit includes a voltage stabilizing circuit and a resistor circuit; the resistance circuit comprises a first voltage-dividing resistor, a second voltage-dividing resistor and a grounding resistor;

after the generating a first control signal according to the current battery temperature and the current voltage, the method further includes:

when the first control signal is the high-resistance state signal, adjusting the impedance of the current setting end to be the resistance value of the grounding resistor;

when the first control signal is the high level signal, providing a fixed voltage for the current setting end, and adjusting the impedance of the current setting end to be the resistance value of the grounding resistor;

when the first control signal is the low level signal, the impedance of the current setting end is adjusted to be the resistance value of a target parallel resistor, and the target parallel resistor is an equivalent resistor formed by connecting the first voltage dividing resistor and the second voltage dividing resistor in series and then connecting the first voltage dividing resistor and the second voltage dividing resistor in parallel.

when the first control signal is the high-resistance state signal, adjusting the impedance of the current setting end to be the resistance value of the ground resistor, including:

when the voltage stabilizing circuit receives that the first control signal is the high level signal, the voltage stabilizing circuit adjusts the voltage division value of the resistor device so as to adjust the fixed voltage provided by the voltage stabilizing tube to the current setting end and adjust the impedance of the current setting end to be the grounding resistance.

the acquiring the current battery temperature of the battery in the charging process comprises:

and acquiring the voltage value of the temperature detection circuit through a second input end of the controller, and acquiring the current battery temperature according to the voltage value of the temperature detection circuit.

Optionally, the controller further includes a second output terminal, and the charge management chip further includes an enable terminal;

before the determining, according to the current battery temperature and the current voltage, a first control signal output through a first output terminal of the controller, the method further includes:

determining a second control signal output through the second output end according to the current battery temperature, wherein the second control signal is a high level signal or a low level signal;

when the second control signal output through the second output terminal is the high level signal, executing the step of determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage;

receiving the second control signal through an enable end of the charging management chip, adjusting the enable end to be in an open state when the second control signal is the high level signal so that the charging management chip charges the battery through the battery connecting end, and adjusting the enable end to be in a closed state when the second control signal is the low level signal so that the charging management chip stops charging the battery through the battery connecting end.

Optionally, the charging control circuit further includes a charging enable circuit;

the method further comprises the following steps:

when the enabling end of the charging management chip is in the starting state, the charging enabling circuit inputs working voltage to the charging management chip so that the charging management chip works.

Optionally, the charging control circuit further includes a filter circuit, and the filter circuit includes at least two capacitor devices connected in parallel;

the method further comprises the following steps:

and filtering the charging current output by the charging management chip through the filter circuit.

the method further comprises the following steps:

and acquiring the charging state of the battery through the battery state indicating circuit.

In another aspect, an embodiment of the present application provides a charging control apparatus, where the apparatus is used for a charging control circuit, where the charging control circuit includes a controller, a charging adjustment circuit, and a charging management chip; the device comprises:

the first acquisition module is used for acquiring the current battery temperature and the current voltage of the battery in the charging process;

the first generation module is used for acquiring the current battery temperature and the current voltage of the battery in the charging process;

In another aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the charging control method according to the another aspect and the optional modes thereof.

The technical scheme provided by the embodiment of the application can at least comprise the following beneficial effects:

the charging control circuit provided by the application comprises a controller, a charging adjusting circuit and a charging management chip; the charging management chip comprises a current setting end, a battery connecting end and a temperature detection end; the controller is electrically connected with the input end of the charging adjusting circuit through the first output end, the output end of the charging adjusting circuit is electrically connected with the current setting end of the charging management chip, and the controller is also electrically connected with the battery connecting end of the charging management chip through the first input end; the battery connecting end of the charging management chip is also electrically connected with the anode of the battery; the controller is also electrically connected with the temperature detection end of the charging management chip through a second input end; acquiring the current battery temperature and the current voltage of the battery in the charging process through a controller; determining a first control signal output through a first output end according to the current battery temperature and the current voltage, receiving the first control signal output through the first output end by the controller through the charging adjusting circuit, and adjusting the impedance of the current setting end according to the first control signal; the charging management chip adjusts the charging current according to the impedance of the current setting end, and outputs the charging current through the battery connecting end, so that the charging current can be adjusted in real time, the management capability of the charging current is improved in the charging process, the stability of the charging process is improved, the battery is protected, and the charging safety is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a charge control circuit according to an exemplary embodiment of the present application;

fig. 2 is a schematic structural diagram of another charge control circuit provided in an exemplary embodiment of the present application;

FIG. 3 is a schematic diagram of a voltage regulator circuit according to an exemplary embodiment of the present application;

FIG. 4 is a circuit schematic of a charge adjustment circuit according to an exemplary embodiment of the present application;

FIG. 5 is a schematic diagram of another voltage regulator circuit according to an exemplary embodiment of the present application;

FIG. 6 is a circuit schematic of a temperature sensing circuit according to an exemplary embodiment of the present application;

FIG. 7 is a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application;

FIG. 9 is a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application;

FIG. 10 is a flowchart illustrating a method of controlling charging according to an exemplary embodiment of the present disclosure;

FIG. 11 is a flowchart illustrating a method of controlling charging according to an exemplary embodiment of the present disclosure;

fig. 12 is a block diagram of a charging control apparatus according to an exemplary embodiment of the present application.

Detailed Description

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

Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

It should be noted that the terms "first", "second", "third" and "fourth", etc. in the description and claims of the present application are used for distinguishing different objects, and are not used for describing a specific order. The terms "comprises," "comprising," and "having," and any variations thereof, of the embodiments of the present application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The scheme provided by the application can be used in an actual scene of charging a lithium battery by using the lithium battery in daily life, and for convenience of understanding, some terms and application architectures related to the embodiments of the application are first briefly introduced below.

Trickle (lockle Charge or Pre-Charge): refers to charging a battery by a minute pulse current, and can be generally used for a start phase and an end phase of charging the battery. The trickle currents used for the batteries may be different.

Constant Current Charge (CC Charge): also called constant current charging, refers to charging a battery always according to a fixed current value.

Constant Voltage Charge (CV Charge): also called constant voltage charging, means that the voltage across the battery is always maintained at a fixed voltage value to charge the battery.

With the development of the terminal technology field, various terminals have become an indispensable part of our daily life, most terminals can be powered by their own installed batteries, and when the power is insufficient, the user can charge the batteries in the terminals. Under the normal condition, a user can plug a charger into a terminal to charge the terminal when the terminal is not used, and when the terminal battery is charged, if the terminal battery is not timely charged, the terminal battery is possibly overcharged, so that the battery performance is influenced, and potential safety hazards exist in the charging process of the terminal.

For example, in daily life, a user can connect the terminal, the charger and the power supply according to corresponding interfaces, so as to charge the terminal.

Optionally, the terminal may be a terminal with a battery installed therein, for example, the terminal may be a mobile phone, a tablet computer, an e-book reader, smart glasses, a smart watch, an MP3 player (Moving Picture Experts group Audio Layer III, motion Picture Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts group Audio Layer IV, motion Picture Experts compression standard Audio Layer 4), a notebook computer, a laptop computer, or the like. Optionally, the charger may charge the terminal in a wired charging manner or in a wireless charging manner. Optionally, the power supply is a mobile power supply or a fixed power supply, for example, a power bank, a fixed socket, a computer host, and the like.

Most of batteries used in the terminal are lithium ion batteries, and the charging condition of the terminal battery can be controlled by providing an IC (Integrated Circuit) chip in the terminal. The charging process of the lithium battery is generally divided into three stages, namely trickle, constant current and constant voltage, and the charging current is generally set by setting a configuration resistor of the charging IC chip, wherein the configuration resistor is generally a resistor with a fixed resistance value connected to a setting pin on the charging IC chip. Since most of the batteries belong to temperature sensitive devices, the performance of the batteries can change along with the change of temperature. For example, at higher temperatures, the charging current needs to be reduced to avoid damage to the battery. However, in the above solution, because of the resistor with the fixed resistance value, the charging current of the lithium battery cannot be adjusted in real time according to the temperature of the battery, and when the battery generates heat due to a large charging current, the lithium battery may be damaged or even ignited. However, when the battery temperature is low, lithium metal may be precipitated on the negative electrode due to excessive current, and the positive and negative electrodes may be short-circuited to damage the lithium battery. Therefore, in the charging process of the battery, the fixed resistance value set by the charging mode is too single, so that the charging process of the battery is unsafe, and the flexibility of the charging mode is poor.

In order to improve the safety and diversity of charging the battery, the present application proposes a solution, please refer to fig. 1, which shows a schematic structural diagram of a charging control circuit provided in an exemplary embodiment of the present application. As shown in fig. 1, the charging control circuit 100 may include a controller 101, a charging adjustment circuit 102, and a charging management chip 103;

the controller 101 includes a first input terminal 101a, a first output terminal 101b, and a second input terminal 101c, and the charge management chip 103 includes a current setting terminal 103a, a battery connection terminal 103b, and a temperature detection terminal 103 c.

As shown in fig. 1, the controller 101 is electrically connected to the input terminal of the charging adjustment circuit 102 through a first output terminal 101b, the output terminal of the charging adjustment circuit 102 is electrically connected to a current setting terminal 103a of the charging management chip 103, and the controller 101 is further electrically connected to a battery connection terminal 103b of the charging management chip 103 through the first input terminal 101a, optionally, the controller 1 further includes a battery 104, the battery connection terminal 103b of the charging management chip 103 is further electrically connected to the positive electrode of the battery 104, and the controller 101 is further electrically connected to a temperature detection terminal 103c of the charging management chip 103 through a second input terminal 101 c.

Optionally, the controller 101 is configured to obtain a current voltage of the battery 104 from the first input terminal 101a and obtain a current battery temperature of the battery 104 from the second input terminal 101c during the charging process; and determines a first control signal output through the first output terminal 101b according to the current battery temperature and the current voltage, the first control signal being any one of a high impedance signal, a high level signal, or a low level signal. That is, in the present application, the controller 101 obtains the current battery temperature and the current voltage of the battery 104 during the charging process; and determines a first control signal output through the first output terminal 101b according to the current battery temperature and the current voltage, outputs a high impedance signal through the first output terminal 101b if the determined first control signal is a high impedance signal, outputs a high level signal through the first output terminal 101b if the determined first control signal is a high level signal, and outputs a low level signal through the first output terminal 101b if the determined first control signal is a low level signal.

The charging adjustment circuit 102 is configured to receive a first control signal output by the controller 101 through the first output terminal 101b, and adjust the impedance of the current setting terminal 103a according to the first control signal. That is, after receiving the first control signal output by the controller 101, the charging adjustment circuit 102 adjusts the impedance of the current setting terminal 103a according to the first control signal, so as to achieve the effect of adjusting the impedance, and thus, the impedance connected to the current setting terminal 103a side on the charging management chip 103 in the charging control circuit is flexibly changed.

The charging management chip 103 is configured to adjust the charging current according to the impedance of the current setting terminal, and output the charging current through the battery connection terminal 103 b. That is, the charge management chip 103 adjusts the charging current according to the impedance connected to the current setting terminal 103a side, and outputs the adjusted charging current through the battery connection terminal 103 b.

To sum up, the charge control circuit that this application provided adjusts charging current according to the impedance of current setting end through the management chip of overcharging to through battery link output charging current, can adjust charging current size in real time, improve the managerial ability to charging current in the charging process, increase the stability of charging process, the protection battery improves the security of charging.

To sum up, the charging control circuit of this application further increases the charging current strategy under different battery temperatures and different battery voltages through the impedance change of the current setting end of control charging management chip under original charging management chip to increase the managerial ability to the charging current of battery.

In a possible implementation manner, the charging adjustment circuit further includes a voltage stabilizing circuit and a resistor circuit; the voltage stabilizing circuit is electrically connected with the resistance circuit, the controller is electrically connected with the resistance circuit, and the charging adjusting circuit adjusts the output state through the voltage stabilizing circuit after receiving the first control signal, so that the resistance connection relation of the resistance circuit is adjusted, and the impedance connected with the current setting end side on the charging management chip is indirectly adjusted.

Referring to fig. 2, a schematic structural diagram of another charging control circuit according to an exemplary embodiment of the present disclosure is shown. As shown in fig. 2, the charging control circuit 200 may include a controller 201, a charging adjustment circuit 202, and a charging management chip 203;

the controller 201 includes a first input terminal 201a and a first output terminal 201b, and the charge management chip 203 includes a current setting terminal 203a and a battery connection terminal 203 b;

as shown in fig. 2, the controller 201 is electrically connected to the input terminal of the charging adjustment circuit 202 through the first output terminal 201b, the output terminal of the charging adjustment circuit 202 is electrically connected to the current setting terminal 203a of the charging management chip 203, and the controller 201 is also electrically connected to the battery connection terminal 203b of the charging management chip 203 through the first input terminal 201 a; optionally, fig. 2 further includes a battery 204, and the battery connection terminal 203b of the charge management chip 203 is further electrically connected to the positive electrode of the battery 204.

The controller 201 is used for acquiring the current battery temperature and the current voltage of the battery 204 in the charging process; and determines a first control signal output through the first output terminal 201b according to the current battery temperature and the current voltage, where the first control signal is any one of a high impedance signal, a high level signal, or a low level signal.

The charging adjustment circuit 202 is configured to receive a first control signal output by the controller 201 through the first output terminal 201b, and adjust the impedance of the current setting terminal 203a according to the first control signal.

The charging management chip 203 is used for adjusting the charging current according to the impedance of the current setting terminal, and outputting the charging current through the battery connection terminal 203 b.

Optionally, the charge adjustment circuit 202 includes a voltage stabilizing circuit 202a and a resistor circuit 202 b; the voltage stabilizing circuit 202a is electrically connected to the resistor circuit 202b, the controller 201 is electrically connected to the resistor circuit 202b, and the resistor circuit 202b is further electrically connected to the current setting terminal 203a of the charge management chip 203. The voltage stabilizing circuit 202a is configured to receive a first control signal output by the controller 201 through the first output terminal 201b, adjust an output state of the voltage stabilizing circuit 202a according to the first control signal, and adjust an impedance of the current setting terminal 203a according to the output state of the voltage stabilizing circuit 202 a. That is, the charging adjustment circuit 202 adjusts the output state of the regulator circuit 202a by the regulator circuit 202a inside itself after receiving the first control signal transmitted from the controller 201, thereby indirectly adjusting the impedance of the current setting terminal 203 a.

Optionally, please refer to fig. 3, which shows a schematic structural diagram of a voltage regulator circuit according to an exemplary embodiment of the present application. As shown in fig. 3, the regulator circuit 300 includes a regulator tube 301 and a capacitor circuit 302. The voltage regulator 301 is connected in parallel with the capacitor circuit 302, and the voltage regulator circuit 300 may determine whether the voltage regulator 301 works based on a first control signal, wherein when the first control signal is a high-impedance signal, the voltage regulator 301 does not work, the configuration resistance connected to the current setting end 203a of the charging management chip 203 is determined by a resistance in the resistor circuit 202b, when the first control signal is a high-level signal, the voltage regulator 301 works, the configuration resistance connected to the current setting end 203a of the charging management chip 203 is determined by an equivalent resistance formed by combining the voltage regulator circuit and the resistor circuit 202b, when the first control signal is a low-level signal, the voltage regulator 301 does not work, and the configuration resistance connected to the current setting end 203a of the charging management chip 203 is determined by an equivalent resistance formed by combining the voltage regulator circuit and the resistor circuit 202 b.

Optionally, the resistor circuit 202b includes a first voltage dividing resistor, a second voltage dividing resistor and a ground resistor; the first voltage-dividing resistor comprises a first connecting end and a second connecting end, the second voltage-dividing resistor comprises a third connecting end and a fourth connecting end, and the grounding resistor comprises a fifth connecting end and a sixth connecting end; wherein, the first connection end of the first voltage dividing resistor is electrically connected with the first output end 201b of the controller 201; the second connection end of the first voltage-dividing resistor is electrically connected with the third connection end of the second voltage-dividing resistor, one end of the voltage-stabilizing circuit 202a is electrically connected between the second connection end and the third connection end, and the other end of the voltage-stabilizing circuit 202a is grounded; the fourth connection end of the second voltage-dividing resistor is electrically connected with the current setting end 203a of the charging management chip 203, and the ground resistor is electrically connected between the fourth connection end and the current setting end 203a through the fifth connection end; the grounding resistor is grounded through the sixth connecting end.

Referring to fig. 4, a circuit diagram of a charge adjustment circuit according to an exemplary embodiment of the present application is shown. As shown in fig. 4, the charge adjustment circuit 400 includes a regulator circuit 401 and a resistor circuit 402, and the regulator circuit 401 includes a regulator tube 401a and a capacitor circuit 401 b. The resistor circuit 402 includes a first voltage-dividing resistor R1, a second voltage-dividing resistor R2, and a ground resistor R3. In fig. 4, the regulator circuit and the resistor circuit are electrically connected as described above, and when the charge adjustment circuit 400 receives the first control signal, the output state of the regulator circuit 401 is adjusted, and the impedance of the resistor circuit 402 connected to the current setting end side is adjusted based on the output state of the regulator circuit 401.

Optionally, when the regulator circuit 202a and the resistor circuit 202b in fig. 2 are designed as shown in fig. 4, the regulator circuit 202a in fig. 2 is further configured to adjust the impedance of the current setting terminal 203a to be a ground resistor when receiving that the first control signal output by the controller 201 through the first output terminal 201b is a high-impedance state signal; the voltage stabilizing circuit 202a is further configured to provide a fixed voltage to the current setting terminal 203a and adjust the impedance of the current setting terminal 203a to be a ground resistance when receiving that the first control signal output by the controller 201 through the first output terminal 201b is a high level signal; the voltage stabilizing circuit 202a is further configured to adjust the impedance of the current setting terminal 203a to be a target parallel resistance when receiving that the first control signal output by the controller 201 through the first output terminal 201b is a low level signal, where the target parallel resistance is an equivalent resistance formed by connecting the first voltage dividing resistor and the second voltage dividing resistor in series and then connecting the first voltage dividing resistor and the second voltage dividing resistor in parallel with the ground resistor.

For example, as shown in fig. 4, the charging adjustment circuit obtains the current battery temperature and the current voltage of the battery during the charging process, and then detects the temperature range and the current voltage of the current battery temperature. When the current battery temperature is in the first temperature range and the current voltage is smaller than the first voltage threshold, the controller 201 outputs a high resistance state signal to the current setting terminal through the first output terminal 201b, and adjusts the impedance of the current setting terminal 203a to be the ground resistance. When the current battery temperature is in the first temperature range and the current voltage is not less than the first voltage threshold, the controller 201 outputs a low level signal to the current setting terminal through the first output terminal 201b, and adjusts the impedance of the current setting terminal 203a to be the target parallel resistance. When the current battery temperature is in the second temperature range and the current voltage is smaller than the first voltage threshold, the controller 201 outputs a high impedance state signal to the current setting terminal through the first output terminal 201b, and adjusts the impedance of the current setting terminal 203a to the ground resistor 202b 3. When the current battery temperature is in the second temperature range and the current voltage is not less than the first voltage threshold, the controller 201 outputs a high level signal through the first output terminal 201b, provides a fixed voltage to the current setting terminal 203a, and adjusts the impedance of the current setting terminal 203a to the ground resistance. The first temperature range, the second temperature range and the first voltage threshold may be set by a developer in advance according to experimental data.

For example, in the charging control circuit provided in the present application, in the above-mentioned fig. 4, the current setting end of the charging management chip is in the high impedance state receiving the output of the controller, taking the first temperature range of 10 degrees celsius to 45 degrees celsius, the second temperature range of 0 degrees celsius to 10 degrees celsius, and the first voltage threshold of 3.2 volts (V) as an exampleWhen the current is less than 3.2V, the charging control circuit enters a trickle charging state, and the charging current in the charging process is the charging current in the trickle charging state

When the current setting end of the charging management chip receives a low level signal output by the controller, the voltage of the current setting end is divided into a ground voltage through R3 and then pulled to the controller through R1 and R2 in series, namely the impedance Rset of the current setting end is

When the current voltage is not less than 3.2V and the current battery temperature is in the first temperature range, the battery can enter a normal constant-current charging state when being charged, and at the moment, the charging current in the charging process is

When the current setting end of the charging management chip receives a high-level signal output by the controller, a voltage regulator tube in the voltage regulator circuit works normally and provides a voltage regulator source of 2.5V, the voltage regulator tube obtains a Vset voltage through the voltage division of R2 and R3, the voltage of the current setting end is grounded through R3, and namely R3 is the resistance Rset of an ISET pin. When the present voltage is not less than 3.2V and the present battery temperature is within the second temperature range, the magnitude of the constant current charging current is reduced by the cooperation with Vset at R3. Wherein the content of the first and second substances,

I_smallTo a reduced charging current.

Optionally, the controller 201 is further configured to determine a temperature range of the current battery temperature according to the current battery temperature before determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage, and when the temperature range is within a preset temperature range, the second control signal is a high-level signal to control the charging management chip 203 to charge the battery; when the temperature range is not within the preset temperature range, the second control signal is a low level signal, and the charging management chip 203 is controlled to stop charging the battery. For example, the preset temperature range may be the same as the first temperature range, and is set by the developer in advance according to the experimental data. The preset temperature range may be 0 to 45 degrees centigrade, when the temperature range of the current battery temperature is within the preset temperature range, it indicates that the battery is within the chargeable temperature range, and the second control signal output by the controller through the second output terminal is a high-level signal, so as to control the charging management chip 203 to charge the battery; when the temperature range of the current battery temperature is not within the preset temperature range, it indicates that the battery is not within the chargeable temperature range and cannot be charged, and the second control signal output by the controller through the second output terminal is a low level signal, so as to control the charging management chip 203 to stop charging the battery.

Optionally, the voltage stabilizing circuit 202a includes a voltage regulator tube, a capacitor device and a resistor device; the voltage-stabilizing tube is connected with the capacitor device in parallel, and the voltage-stabilizing tube is connected with the resistor device in parallel; the capacitor device is connected with the resistor device in parallel; the voltage stabilizing circuit 202a is further configured to adjust a voltage dividing value of the resistor device when receiving that the first control signal output by the controller 201 through the first output terminal 201b is a high level signal, so as to adjust the fixed voltage provided to the current setting terminal 203a and adjust the impedance of the current setting terminal 203a to be a ground resistance. That is, in a possible implementation manner, the voltage regulator circuit 202a provided by the present application may further have a voltage regulation function, please refer to fig. 5, which shows a schematic structural diagram of another voltage regulator circuit according to an exemplary embodiment of the present application. As shown in fig. 5, the voltage stabilizing circuit 500 further includes a voltage regulator tube 501, a capacitor device 502 and a resistor device 503; the voltage regulator tube 501, the capacitor device 502 and the resistor device 503 are connected as shown in fig. 5, and when the voltage regulator circuit 500 receives a first control signal which is a high level signal, the voltage division value of the resistor device 503 is adjusted, so that the fixed voltage provided to the current setting end through the voltage regulator tube 501 is adjusted, and the impedance of the current setting end is adjusted to be a ground resistance.

Optionally, the controller 201 further includes a second input terminal 201c, the charging control circuit 200 further includes a temperature detection circuit 205, and the charging management chip 203 further includes a temperature detection terminal 203 c; the second input terminal 201c is electrically connected to the temperature detecting circuit 205, and the temperature detecting circuit 205 is further electrically connected to the temperature detecting terminal 203 c. The controller 201 is configured to obtain a voltage value of the temperature detection circuit 205 through the second input terminal 201c, and obtain a current battery temperature according to the voltage value of the temperature detection circuit 205. That is, in this application, the charging control circuit 200 further includes a temperature detection circuit 205, the temperature detection circuit 205 is electrically connected to a temperature detection terminal 203c on the charging management chip 203, and the controller 201 is also electrically connected to the temperature detection circuit 205 through its own second input terminal 201c, so as to obtain a voltage value of the temperature detection circuit. In one possible implementation, the temperature detection circuit 205 includes a thermistor. Referring to fig. 6, a schematic circuit diagram of a temperature detection circuit according to an exemplary embodiment of the present application is shown. As shown in fig. 6, the temperature detection circuit 600 includes a thermistor 601, a connection point 602, a second input terminal of the controller is electrically connected to the connection point 602, and a temperature detection terminal of the charging management chip is also electrically connected to the connection point 602. The controller detects the voltage value across the thermistor through the connection point 602, and obtains the corresponding current battery temperature from the voltage value.

Optionally, the controller 201 further includes a second output end 201d, the charging management chip 203 further includes an enable end 203d, and the controller 201 is further electrically connected to the enable end 203d of the charging management chip 203 through the second output end 201 d; the controller 201 is further configured to determine a second control signal output through the second output terminal 201d according to the current battery temperature before determining the first control signal output through the first output terminal 201b according to the current battery temperature and the current voltage, where the second control signal is a high level signal or a low level signal; the controller 201 is further configured to perform a step of determining the first control signal output through the first output terminal 201b according to the current battery temperature and the current voltage when the second control signal output through the second output terminal 201d is a high level signal; the charging management chip 203 is further configured to receive a second control signal through the enable terminal 203d, adjust the enable terminal 203d to be in an on state when the second control signal is a high level signal, so that the charging management chip charges the battery through the battery connection terminal, and adjust the enable terminal 203d to be in an off state when the second control signal is a low level signal, so that the charging management chip stops charging the battery through the battery connection terminal.

That is, before the controller performs the step of determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage, the controller determines the second control signal output through the second output terminal according to the current battery temperature, performs the step of determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage when the second control signal is a high level signal, and controls the enable terminal of the charge management chip to be turned off through the low level signal and stops charging the battery when the second control signal is a low level signal.

For example, the controller determines the temperature range of the current battery temperature, when the current battery temperature is within a range from 0 ℃ to 45 ℃, the second control signal output by the controller 201 through the second output terminal 201d is a high level signal, the enable terminal 203d is adjusted to be in an on state, and a subsequent step of determining the first control signal output through the first output terminal 201b according to the current battery temperature and the current voltage is performed, and when the current battery temperature is less than 0 ℃ or higher than 45 ℃, the second control signal output by the controller 201 through the second output terminal 201d is a low level signal, the enable terminal 203d is adjusted to be in an off state.

Optionally, the charging control circuit 200 further includes a charging enable circuit 206, the charging management chip further includes an input voltage terminal 203g, one output terminal of the charging enable circuit 206 is electrically connected to the enable terminal 203d of the charging management chip 203, and the other output terminal of the charging enable circuit 206 is electrically connected to the input voltage terminal 203g of the charging management chip 203; the charge enable circuit 206 is configured to input an operating voltage to the charge management chip 203 when the enable terminal 203d of the charge management chip 203 is in an on state, so that the charge management chip 203 operates. Referring to fig. 7, a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application is shown. As shown in fig. 7, the charge enable circuit 700 includes a first capacitor 701, a second capacitor 702, and a resistor 703. In fig. 7, a first capacitor 701, a second capacitor 702, and a resistor 703 are connected as shown in fig. 7, and when the enable terminal is in the on state, the charge enable circuit inputs an operating voltage to the charge management chip, and when the enable terminal is in the off state, the charge enable circuit does not input an operating voltage to the charge management chip, and the charge management chip is in the off state.

Optionally, the charging control circuit 200 further includes a filter circuit 207, the filter circuit 207 includes at least two capacitor devices connected in parallel, and the filter circuit 207 is connected between the battery connection terminal 203b and the positive electrode of the battery 204; the filter circuit 208 is used for filtering the charging current output by the charging management chip 203. Referring to fig. 8, a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application is shown. As shown in fig. 8, the charge enable circuit 800 includes a first capacitor 801 and a second capacitor 802. In fig. 8, a first capacitor 801 and a second capacitor 802 are connected as shown in fig. 8, and when the charging management chip outputs a charging current through the battery connection terminal, the filter circuit filters the charging current through the first capacitor and the second capacitor.

Optionally, the charging control circuit 200 further includes a battery status indication circuit 208, and the charging management chip 203 further includes a completion indication terminal 203e and a charging indication terminal 203 f; the battery status indication circuit 208 is electrically connected to the completion indication terminal 203e and the charging indication terminal 203f respectively; the battery state indicating circuit 208 is used for acquiring the charging state of the battery 204 through the completion indicating terminal 203e and the charging indicating terminal 203 f. Referring to fig. 9, a schematic diagram of a charge enable circuit according to an exemplary embodiment of the present application is shown. As shown in fig. 9, the charge enable circuit 900 includes a first resistor 901 and a second resistor 902. In fig. 9, the first resistor 901 and the second resistor 902 are connected as shown in fig. 9, and the charging indication circuit can detect the current charging state of the battery through the completion indication terminal and the charging indication terminal.

In summary, the charging control circuit provided by the present application includes a controller, a charging adjustment circuit, and a charging management chip; the charging management chip comprises a current setting end, a battery connecting end and a temperature detection end; the controller is electrically connected with the input end of the charging adjusting circuit through the first output end, the output end of the charging adjusting circuit is electrically connected with the current setting end of the charging management chip, and the controller is also electrically connected with the battery connecting end of the charging management chip through the first input end; the battery connecting end of the charging management chip is also electrically connected with the anode of the battery; the controller is also electrically connected with the temperature detection end of the charging management chip through a second input end; acquiring the current battery temperature and the current voltage of the battery in the charging process through a controller; determining a first control signal output through a first output end according to the current battery temperature and the current voltage, receiving the first control signal output through the first output end by the controller through the charging adjusting circuit, and adjusting the impedance of the current setting end according to the first control signal; the charging management chip adjusts the charging current according to the impedance of the current setting end, and outputs the charging current through the battery connecting end, so that the charging current can be adjusted in real time, the management capability of the charging current is improved in the charging process, the stability of the charging process is improved, the battery is protected, and the charging safety is improved.

The following embodiments of the method of the present application may be executed by the charging control circuit provided in the present application, and achieve the purpose of adjusting the charging current in real time, protecting the battery, and increasing the charging safety and diversity. For details that are not disclosed in the method embodiments of the present application, please refer to the structural embodiments of the charge control circuit shown in fig. 1 to 9.

Referring to fig. 10, a flowchart of a method of controlling charging according to an exemplary embodiment of the present disclosure is shown. The method is used in the charging control circuit shown in fig. 1 or fig. 2, and as shown in fig. 10, the charging control method includes the following steps:

in step 1001, a current battery temperature and a current voltage of a battery are obtained during a charging process.

Optionally, the manner in which the controller obtains the current battery temperature and the current voltage may refer to the description in the above embodiments, and details are not repeated here.

Step 1002, generating a first control signal according to the current battery temperature and the current voltage, so that the charging adjustment circuit adjusts the impedance of the current setting end of the charging management chip according to the first control signal; and enabling the charging management chip to adjust the charging current according to the impedance detected by the current setting end.

Optionally, the manner of determining, by the controller, the first control signal output through the first output end according to the current battery temperature and the current voltage may also refer to the description in the foregoing embodiment, and details are not repeated here.

Optionally, the manner in which the charging adjustment circuit adjusts the impedance of the current setting end according to the received first control signal may also refer to the description in the above embodiments, and details are not repeated here.

Optionally, the charging management chip may also refer to the description in the foregoing embodiment, and details are not repeated here.

Referring to fig. 11, a flowchart of another charging control method according to an exemplary embodiment of the present disclosure is shown. The method is used in the charging control circuit shown in fig. 1 or fig. 2, and as shown in fig. 11, the charging control method includes the following steps:

and 1101, acquiring the current battery temperature and the current voltage of the battery in the charging process through the controller.

Optionally, the manner in which the controller obtains the current battery temperature and the current voltage may refer to the description in the above embodiments, and details are not repeated here. For example, the controller further includes a second input terminal, the charging control circuit further includes a temperature detection circuit, and the charging management chip further includes a temperature detection terminal; the second input end is electrically connected with the temperature detection circuit, and the temperature detection circuit is also electrically connected with the temperature detection end; the controller can acquire the voltage value of the temperature detection circuit through the second input end, and acquire the current battery temperature according to the voltage value of the temperature detection circuit.

Step 1102, determining a second control signal output through a second output terminal according to the current battery temperature.

As shown in the structure of the charge control circuit in fig. 1 or fig. 2 described above, the controller detects the current battery temperature as described in the above embodiment, thereby determining which signal the second control signal output through the second output terminal is.

In step 1103, when the second control signal output through the second output terminal is a high level signal, a preset temperature range where the current battery temperature is located is detected.

Namely, the controller also comprises a second output end, the charging management chip also comprises an enabling end, and the controller is electrically connected with the enabling end of the charging management chip through the second output end; before the controller determines the first control signal output through the first output terminal according to the current battery temperature and the current voltage, the method further comprises the following steps: determining a second control signal output through a second output end according to the current battery temperature, wherein the second control signal is a high level signal or a low level signal; when the second control signal output through the second output terminal is a high level signal, performing a step of determining a first control signal output through the first output terminal according to a current battery temperature and a current voltage; and when the second control signal is a low level signal, the enable end is adjusted to be in a closed state, so that the charging management chip stops charging the battery through the battery connecting end.

In a possible implementation manner, the charging control circuit further includes a charging enable circuit, and an output end of the charging enable circuit is electrically connected to an enable end of the charging management chip; when the enabling end of the charging management chip is in an on state, the charging enabling circuit inputs working voltage to the charging management chip so that the charging management chip works.

In step 1104, when the preset temperature range in which the current battery temperature is located is the first preset temperature range, it is detected whether the current voltage is smaller than a first voltage threshold.

In step 1105, when the current voltage is smaller than the first voltage threshold, it is determined that the first control signal output through the first output terminal is a high impedance state signal.

In step 1106, when the current voltage is not less than the first voltage threshold, it is determined that the first control signal output through the first output terminal is a low level signal.

In step 1107, when the preset temperature range where the current battery temperature is located is the second preset temperature range, it is detected whether the current voltage is smaller than the first voltage threshold.

Step 1108, determining that the first control signal output through the first output terminal is a high impedance state signal when the current voltage is smaller than the first voltage threshold.

Step 1109, when the current voltage is not less than the first voltage threshold, determining that the first control signal output through the first output terminal is a high level signal.

The content of the above step 1104 to step 1109 is that the charging adjustment circuit in this scheme includes a voltage stabilizing circuit and a resistor circuit; the voltage stabilizing circuit is electrically connected with the resistance circuit, the controller is electrically connected with the resistance circuit, and the resistance circuit is also electrically connected with the current setting end of the charging management chip; and a process of receiving a first control signal output by the controller through the first output end through the voltage stabilizing circuit, adjusting the output state of the voltage stabilizing circuit according to the first control signal, and adjusting the impedance of the current setting end according to the output state of the voltage stabilizing circuit. When the current battery temperature is in a first temperature range and the current voltage is smaller than a first voltage threshold value, generating a high-resistance state signal; when the current battery temperature is in a first temperature range and the current voltage is not less than a first voltage threshold value, generating a low-level signal; when the current battery temperature is in a second temperature range and the current voltage is smaller than a first voltage threshold value, generating a high-resistance state signal; and when the current battery temperature is in a second temperature range and the current voltage is not less than the first voltage threshold value, generating a high-level signal.

In step 1110, when the second control signal output through the second output terminal is a low level signal, the battery is prohibited from being charged.

And 1111, receiving, by the voltage stabilizing circuit, a first control signal output by the controller through the first output terminal, adjusting an output state of the voltage stabilizing circuit according to the first control signal, and adjusting an impedance of the current setting terminal according to the output state of the voltage stabilizing circuit.

Optionally, the resistor circuit includes a first voltage dividing resistor, a second voltage dividing resistor and a ground resistor; the first voltage-dividing resistor comprises a first connecting end and a second connecting end, the second voltage-dividing resistor comprises a third connecting end and a fourth connecting end, and the grounding resistor comprises a fifth connecting end and a sixth connecting end; the first connecting end of the first divider resistor is electrically connected with the first output end of the controller; the second connecting end of the first voltage-dividing resistor is electrically connected with the third connecting end of the second voltage-dividing resistor, one end of the voltage-stabilizing circuit is electrically connected between the second connecting end and the third connecting end, and the other end of the voltage-stabilizing circuit is grounded; the fourth connecting end of the second voltage-dividing resistor is electrically connected with the current setting end of the charging management chip, and the grounding resistor is electrically connected between the fourth connecting end and the current setting end through the fifth connecting end; the grounding resistor is grounded through the sixth connecting end.

In the step, when a first control signal output by the controller through the first output end is a high-impedance state signal, the impedance of the current setting end is adjusted to be a ground resistance through the voltage stabilizing circuit; when a first control signal output by the controller through the first output end is a high-level signal, the voltage stabilizing circuit provides fixed voltage for the current setting end and adjusts the impedance of the current setting end into a ground resistor; when a first control signal output by the controller through the first output end is a low level signal, the impedance of the current setting end is adjusted to be a target parallel resistor, and the target parallel resistor is an equivalent resistor formed by connecting a first divider resistor and a second divider resistor in series and then connecting the first divider resistor and the second divider resistor in parallel.

In one possible implementation manner, the voltage stabilizing circuit comprises a voltage stabilizing tube, a capacitor device and a resistor device; the voltage-stabilizing tube is connected with the capacitor device in parallel, and the voltage-stabilizing tube is connected with the resistor device in parallel; the capacitor device is connected with the resistor device in parallel; when the voltage stabilizing circuit receives that a first control signal output by the controller through the first output end is a high-level signal, the voltage stabilizing circuit adjusts the voltage division value of the resistor device so as to adjust the fixed voltage provided for the current setting end and adjust the impedance of the current setting end to be a ground resistor.

In a possible implementation manner, the charging control circuit further includes a filter circuit, the filter circuit includes at least two capacitor devices connected in parallel, and the filter circuit is connected between the battery connection terminal and the positive electrode of the battery; the scheme also comprises the step of filtering the charging current output by the charging management chip through a filter circuit.

In a possible implementation manner, the charging control circuit further includes a battery status indication circuit, and the charging management chip further includes a completion indication terminal and a charging indication terminal; the battery state indicating circuit is electrically connected with the completion indicating end and the charging indicating end respectively; the scheme also comprises the step of acquiring the charging state of the battery through the battery state indicating circuit.

The various steps executed above may refer to the description in the above embodiments, and are not described herein again.

In summary, the charging control circuit provided by the present application can obtain the current battery temperature and the current voltage of the battery during the charging process; according to the current battery temperature and the current voltage, the first control signal is generated, so that the impedance of the current setting end of the charging management chip in the charging control circuit is adjusted according to the first control signal, the impedance detected by the charging management chip according to the current setting end is changed, the magnitude of the charging current can be adjusted in real time, the management capability of the charging current is improved in the charging process, the stability of the charging process is improved, the battery is protected, and the charging safety is improved.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Referring to fig. 12, a block diagram of a charging control apparatus 1200 according to an exemplary embodiment of the present disclosure is shown, where the charging control apparatus can be applied to a charging control circuit, where the charging control circuit includes a controller, a charging adjustment circuit, a charging management chip, and a battery; the controller comprises a first input end and a first output end, and the charging management chip comprises a current setting end and a battery connecting end; the controller is electrically connected with the input end of the charging adjusting circuit through the first output end, the output end of the charging adjusting circuit is electrically connected with the current setting end of the charging management chip, and the controller is also electrically connected with the battery connecting end of the charging management chip through the first input end; the battery connecting end of the charging management chip is also electrically connected with the anode of the battery; the charge control device 1200 includes:

a first obtaining module 1201, configured to obtain a current battery temperature and a current voltage of the battery during the charging process.

A first generating module 1202, configured to generate a first control signal according to the current battery temperature and the current voltage, so that the charging adjustment circuit adjusts an impedance of a current setting end of the charging management chip according to the first control signal; and enabling the charging management chip to adjust the charging current according to the impedance detected by the current setting end.

the first generating module 1202 includes: a first generation unit, a second generation unit, a third generation unit and a fourth generation unit;

the first generating unit is used for generating the high-impedance state signal when the current battery temperature is in a first temperature range and the current voltage is smaller than a first voltage threshold;

the second generating unit is used for generating the low-level signal when the current battery temperature is in a first temperature range and the current voltage is not less than the first voltage threshold;

the third generating unit is configured to generate the high-impedance state signal when the current battery temperature is in a second temperature range and the current voltage is smaller than the first voltage threshold;

the fourth generating unit is configured to generate the high level signal when the current battery temperature is in a second temperature range and the current voltage is not less than the first voltage threshold.

the device further comprises:

a first adjusting module, configured to adjust an impedance of the current setting terminal to be a resistance value of the ground resistor when the first control signal is the high-resistance state signal after the first control signal is generated according to the current battery temperature and the current voltage;

the second adjusting module is used for providing fixed voltage for the current setting end and adjusting the impedance of the current setting end to be the resistance value of the grounding resistor when the first control signal is the high-level signal;

a third adjusting module, configured to adjust, when the first control signal is the low-level signal, an impedance of the current setting end to be a resistance value of a target parallel resistor, where the target parallel resistor is an equivalent resistor in which the first voltage-dividing resistor is connected in series with the second voltage-dividing resistor and then connected in parallel with the ground resistor.

and the third adjusting module is further configured to adjust the voltage division value of the resistor device through the voltage stabilizing circuit when the voltage stabilizing circuit receives that the first control signal output by the controller through the first output terminal is the high level signal, so as to adjust the fixed voltage provided to the current setting terminal and adjust the impedance of the current setting terminal to be the ground resistance.

the first obtaining module 1201 is further configured to obtain a voltage value of the temperature detection circuit through a second input end of the controller, and obtain the current battery temperature according to the voltage value of the temperature detection circuit.

the device further comprises:

a second determining module, configured to determine a second control signal output through the second output terminal according to the current battery temperature before determining, through the controller, a first control signal output through the first output terminal according to the current battery temperature and the current voltage, where the second control signal is a high level signal or a low level signal;

a first executing module, configured to execute the step of determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage when the second control signal output through the second output terminal is the high-level signal;

and a third adjusting module, configured to receive the second control signal through the enable terminal, adjust the enable terminal to be in an on state when the second control signal is the high level signal, so that the charging management chip charges the battery through the battery connection terminal, and adjust the enable terminal to be in an off state when the second control signal is the low level signal, so that the charging management chip stops charging the battery through the battery connection terminal.

the device further comprises:

the first input module is used for inputting working voltage to the charging management chip through the charging enabling circuit when the enabling end of the charging management chip is in the starting state, so that the charging management chip works.

the device further comprises:

and the first filtering module is used for filtering the charging current output by the charging management chip through the filtering circuit.

the device further comprises:

and the state acquisition module is used for acquiring the charging state of the battery through the battery state indication circuit.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The embodiment of the application also discloses a vehicle, which comprises a vehicle-mounted terminal, wherein the vehicle-mounted terminal comprises a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor, so that the processor realizes the charging control method in the above method embodiment. Optionally, the terminal may be a vehicle-mounted terminal in this embodiment.

The embodiment of the application also discloses a computer readable storage medium which stores a computer program, wherein the computer program realizes the method in the embodiment of the method when being executed by a processor.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also appreciate that the embodiments described in this specification are all alternative embodiments and that the acts and modules involved are not necessarily required for this application.

In various embodiments of the present application, it should be understood that the size of the serial number of each process described above does not mean that the execution sequence is necessarily sequential, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated units, if implemented as software functional units and sold or used as a stand-alone product, may be stored in a computer accessible memory. Based on such understanding, the technical solution of the present application, which is a part of or contributes to the prior art in essence, or all or part of the technical solution, may be embodied in the form of a software product, stored in a memory, including several requests for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute part or all of the steps of the above-described method of the embodiments of the present application.

It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by hardware instructions of a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM), or other Memory, such as a magnetic disk, or a combination thereof, A tape memory, or any other medium readable by a computer that can be used to carry or store data.

The charging control method, the charging control device, the charging control terminal and the charging control storage medium disclosed in the embodiments of the present application are described above by way of example, and a principle and an implementation of the present application are described herein by applying an example, and the description of the above embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A charging control circuit is characterized by comprising a controller, a charging adjusting circuit and a charging management chip;

2. The charge control circuit of claim 1, wherein the charge adjustment circuit comprises a voltage regulator circuit and a resistor circuit; the voltage stabilizing circuit is electrically connected with the resistor circuit, the controller is electrically connected with the resistor circuit, and the resistor circuit is also electrically connected with the current setting end of the charging management chip;

3. The charge control circuit according to claim 2, wherein the resistance circuit includes a first voltage-dividing resistance, a second voltage-dividing resistance, and a ground resistance; the first voltage-dividing resistor comprises a first connecting end and a second connecting end, the second voltage-dividing resistor comprises a third connecting end and a fourth connecting end, and the grounding resistor comprises a fifth connecting end and a sixth connecting end;

the grounding resistor is grounded through the sixth connecting end.

4. The charge control circuit according to claim 3, wherein the first control signal is any one of a high impedance signal, a high level signal, or a low level signal;

the voltage stabilizing circuit is also used for adjusting the impedance set at the current setting end to be the resistance value of the grounding resistor when the high-resistance state signal is received;

the voltage stabilizing circuit is also used for adjusting the impedance set at the current setting end to be the resistance value of the grounding resistor when the high level signal is received;

the voltage stabilizing circuit is further used for adjusting the impedance set at the current setting end to be the resistance value of a target parallel resistor when the low level signal is received, wherein the target parallel resistor is an equivalent resistor formed by connecting the first divider resistor and the second divider resistor in series and then connecting the first divider resistor and the second divider resistor in parallel.

5. The charge control circuit of claim 4, wherein the voltage regulator circuit comprises a voltage regulator tube, a capacitor device and a resistor device;

6. The charge control circuit of claim 1, further comprising a temperature detection circuit;

7. The charge control circuit of claim 1, wherein the controller further comprises a second output terminal, the charge management chip further comprises an enable terminal, and the controller is further electrically connected to the enable terminal of the charge management chip through the second output terminal;

8. The charge control circuit of claim 7, further comprising a charge enable circuit, wherein an output terminal of the charge enable circuit is electrically connected to an enable terminal of the charge management chip;

9. The charging control circuit of claim 7, wherein the controller is further configured to determine a temperature range of the current battery temperature according to the current battery temperature before determining the first control signal output through the first output terminal according to the current battery temperature and the current voltage, and when the temperature range is within a preset temperature range, the second control signal is the high-level signal to control the charging management chip to charge the battery; and when the temperature range is not within the preset temperature range, the second control signal is the low level signal, and the charging management chip is controlled to stop charging the battery.

10. The charge control circuit of claim 1, further comprising a filter circuit comprising at least two capacitive devices connected in parallel, the filter circuit being connected between the battery connection terminal and the positive electrode of the battery;

11. The charge control circuit of claim 1, wherein the charge control circuit further comprises a battery status indication circuit, and the charge management chip further comprises a completion indication terminal and a charge indication terminal;

12. A charging control method is characterized in that the method is used for a charging control circuit, and the charging control circuit comprises a controller, a charging adjusting circuit and a charging management chip; the method comprises the following steps:

13. The charge control method according to claim 12, wherein the first control signal is any one of a high impedance signal, a high level signal, or a low level signal;

14. The charge control method according to claim 13, wherein the charge adjustment circuit includes a voltage stabilizing circuit and a resistance circuit; the resistance circuit comprises a first voltage-dividing resistor, a second voltage-dividing resistor and a grounding resistor;

15. The charge control method according to claim 14, wherein the voltage stabilizing circuit includes a voltage regulator tube, a capacitor device and a resistor device;

16. The charge control method according to claim 12, wherein the controller further comprises a second input terminal, the charge control circuit further comprises a temperature detection circuit, and the charge management chip further comprises a temperature detection terminal;

17. The charge control method according to claim 12, wherein the controller further comprises a second output terminal, the charge management chip further comprises an enable terminal;

18. The charge control method according to claim 17, wherein the charge control circuit further comprises a charge enable circuit;

the method further comprises the following steps:

19. The charge control method according to claim 12, wherein the charge control circuit further comprises a filter circuit including at least two capacitive devices connected in parallel;

the method further comprises the following steps:

20. The charge control method according to claim 12, wherein the charge control circuit further comprises a battery status indication circuit, and the charge management chip further comprises a completion indication terminal and a charge indication terminal;

the method further comprises the following steps:

21. A charging control device is characterized in that the device is used for a charging control circuit, and the charging control circuit comprises a controller, a charging adjusting circuit and a charging management chip; the device comprises:

22. A computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing the charging control method according to any one of claims 12 to 20.