CN116760145A

CN116760145A - Intelligent charging control circuit and method

Info

Publication number: CN116760145A
Application number: CN202310948290.1A
Authority: CN
Inventors: 张克旺; 李学军; 莫江领
Original assignee: DONGGUAN AOYUAN ELECTRONIC TECHNOLOGY CO LTD
Current assignee: DONGGUAN AOYUAN ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2023-09-15

Abstract

According to the intelligent charging control circuit and the intelligent charging control method, the charging power is adaptively adjusted according to the current electric quantity information and the current temperature information of the electric storage equipment, so that the electric storage equipment is always in a preset working temperature state, and is charged with higher power, the safety and the speed of a charging process are ensured, and the service life of the electric storage equipment is further protected. According to the method and the device, the charging habit of the user can be analyzed according to the charging record of the power storage equipment, the actual demand of the user on the charging process is predicted according to the charging habit, the charging process of the power storage equipment meets the expectations of the user, and the use experience of the user is improved.

Description

Intelligent charging control circuit and method

Technical Field

The invention belongs to the field of charger control, and particularly discloses an intelligent charging control circuit and method.

Background

In daily life, along with the wide application of portable electronic products, in order to meet better use experience of users, the service time of the electronic products is generally prolonged through a high-capacity battery. Along with the application of the large-capacity battery, the charging process of the battery is also receiving more and more attention. At present, a technology for improving charging power to charge a battery exists in the market, but the high-power charging technology is easy to cause the problem of battery heating. Charging equipment and battery manufacturers need to make a choice when considering the charging speed and the heating problem.

In order to ensure that the battery maintains good performance and to extend the service life of the battery, safe and effective control and management must be designed for the charging process of the battery. The battery is easy to damage by long-time use of high-power charging, overcharge, heating and the like, and even the phenomenon of combustion explosion occurs, but the low-power charging leads to long charging time and influences the use experience.

At present, there are methods for adjusting the charging power according to the battery power to prevent the battery from being overcharged, and methods for reducing the charging power to achieve the cooling effect when the temperature is too high, but the balance cannot be made before the problems of charging speed and heating, so that the battery can be ensured to rapidly complete the charging task at the allowable working temperature.

Therefore, it is necessary to design a control technology capable of ensuring safe operation of the battery, prolonging the service life and rapidly completing the charging.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an intelligent charging control circuit and method, which intelligently adjusts charging power according to a user charging habit, a battery characteristic, a charging temperature and a state, and ensures that a battery is kept in a safe charging power and operating temperature state while ensuring that a charging speed meets a user experience, thereby ensuring a service life of the battery.

In order to achieve the above object, a first aspect of the present invention provides an intelligent charge control circuit, which:

the processor is used for collecting current electric quantity information and temperature information of the power storage equipment, calculating output power adjustment control quantity and controlling the output power to charge the power storage equipment;

the charging information acquisition and analysis unit is used for acquiring a charging record and first power information of the power storage equipment, obtaining first prediction information of charging operation, and transmitting the first prediction information to the electric quantity detection control unit;

the electric quantity detection control unit comprises an electric quantity detection circuit of the electric storage equipment, is used for acquiring current electric quantity information of the electric storage equipment and receiving first prediction information from the charging information acquisition and analysis unit, and is used for analyzing and obtaining second power information and first working temperature information of the electric storage equipment; the electric quantity detection control unit transmits the second power information and the first working temperature information to the temperature detection control unit;

a temperature detection control unit including at least one temperature detection element for acquiring current temperature information of the power storage device; the temperature detection control unit receives the second power information and the first working temperature information transmitted by the electric quantity detection control unit, calculates the difference value between the current temperature information and the first working temperature information to obtain first temperature difference value information, and calculates the output power regulation control quantity of the charging equipment by using the first temperature difference value information so as to regulate the output power of the charging power output unit;

The charging power output unit is used for receiving the output power adjustment control quantity transmitted by the temperature detection control unit so as to adjust the output power;

and a power storage device for storing electric energy from the charging power output unit.

In this scheme, the charging power output unit includes:

the direct-current voltage stabilizing circuit is used for outputting adjustable constant voltage; at least comprises the following steps: the adjustable voltage stabilizing chip U1, the power inductor L1, the first polar capacitor C1, the second polar capacitor C2, the first resistor R1, the second resistor R2;

the power supply pin of the adjustable voltage stabilizing chip U1 is connected with the positive electrode of the first polarity capacitor C1; the switch input pin of the adjustable voltage stabilizing chip U1 is connected with one end of the power inductor L1, and the other end of the power inductor L1 is connected with the positive electrode of the first polarity capacitor C1; the voltage output pin of the adjustable voltage stabilizing chip U1 is connected with the positive electrode of the second polar capacitor C2 and connected with the first end of the first resistor R1; the feedback pin of the adjustable voltage stabilizing chip U1 is connected with the second end of the first resistor R1 and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded; the cathodes of the first polar capacitor C1 and the second polar capacitor C2 are grounded;

At least one of the first resistor R1 and the second resistor R2 is a digitally adjustable varistor.

In this scheme, temperature detection control unit includes:

at least one temperature detecting element for measuring a real-time temperature value of at least one location of the electrical storage device;

the temperature detection element is a thermistor;

one end of the thermistor is grounded, the other end of the thermistor is connected with a temperature-measuring voltage-dividing resistor, and the other end of the temperature-measuring voltage-dividing resistor is connected with a high level; the temperature measuring and voltage dividing resistor is formed by connecting one or more resistors.

In this scheme, electric quantity detection control unit includes:

the electric quantity acquisition element is used for measuring the current electric quantity information of the electric storage equipment;

the electric quantity acquisition element is an electric quantity detection resistor;

one end of the electric quantity detection resistor is connected with the negative electrode of the electric storage device and is connected to the ground, the other end of the electric quantity detection resistor is connected with the electric quantity voltage dividing resistor, and the other end of the electric quantity voltage dividing resistor is connected with the positive electrode of the electric storage device; the electric quantity detection resistor is formed by connecting one or more resistors.

The second aspect of the present invention further provides an intelligent charging control method, which is applied to any one of the above intelligent charging control circuits, and specifically includes:

Detecting a connection state of the electric storage device and the charging device, and when the connection state is the connection state;

acquiring a charging record and first power information of an electric storage device;

obtaining first prediction information according to the charging record of the power storage equipment and the first power information;

acquiring current electric quantity information of the electric storage equipment, and analyzing to obtain second power information and first working temperature information by combining the acquired first prediction information and first power information;

acquiring current temperature information of the power storage equipment, calculating a difference value between the current temperature information and the first working temperature information to obtain first temperature difference value information, and calculating an output power regulation control quantity according to the first temperature difference value information;

obtaining output power information according to the output power adjustment control quantity, adjusting the output power of the charging power output unit, and charging the power storage equipment;

when the charging state is the charging end state, generating and storing charging information;

the second power information is a dynamic charging power value obtained by calculation according to the current electric quantity information of the electric storage equipment and is used as a real-time upper limit value of output power;

the first operating temperature information is the highest operating temperature when the second power information is used for charging the power storage equipment in the current charging of the power storage equipment.

In this scheme, the obtaining the first prediction information specifically includes:

acquiring a charging record and first power information of an electric storage device, and judging whether the current date and the starting time are a high-frequency charging time period or not according to the date, the starting time, the charging duration, the starting electric quantity and the ending electric quantity in the charging record;

if so, analyzing and obtaining the target ending electric quantity and the charging duration of the current charging operation by combining the ending electric quantity and the charging duration in the charging record, and taking the target ending electric quantity and the charging duration as first prediction information; if not, calculating according to the first power information to obtain first prediction information;

the charge record includes: date, start time, charging duration, starting electric quantity and ending electric quantity;

the first power information is the highest charging power allowed by the electric storage device;

the first prediction information comprises a charging duration and a target ending electric quantity in the current date and starting time state.

In this scheme, according to the record of charging of power storage equipment and first power information, obtain first prediction information, specifically be:

the charging record is stored in a local or cloud end;

the charging record is stored locally; the charge record stores in a charging device or a carrier using the electrical storage device; the charging equipment or the carrier of the power storage equipment analyzes the charging record to obtain first prediction information of charging operation;

The charging record is stored in the cloud end; the charging record is stored in a cloud server; and searching a charging record according to the ID information of the power storage equipment, analyzing the charging record to obtain first prediction information, and returning the first prediction information to the processor.

In this scheme, obtain second power information and the first operating temperature information when second power information charges, specifically be:

according to the current electric quantity information, the charging duration in the first prediction information and the target ending electric quantity, a first charging speed and a second charging speed are obtained through calculation, and whether the first charging speed is larger than the second charging speed or not is judged:

if yes, calculating to obtain the second power information according to the second charging speed; if not, the second power information is set by the first power information;

searching in a preset power information and temperature corresponding table, and obtaining first working temperature information according to second power information;

the first charging speed is a charging speed at the time of charging using the first power information;

the second charging speed is calculated according to the current electric quantity information, the charging duration in the first prediction information and the target ending electric quantity.

In this scheme, calculate current temperature information with the difference of first operating temperature information obtains first temperature difference information, according to first temperature difference information calculates output power adjustment control quantity, specifically does:

the output power adjustment control amount includes: an output power proportional control amount calculated by the first temperature difference information, an output power integral control amount calculated by the first temperature difference information accumulation, and an output power differential control amount calculated by the first temperature difference information differentiation;

the output power proportion control quantity is used for adjusting output power according to the current first temperature difference value information, so that the difference value between the current temperature and the first working temperature information is reduced;

the output power integration control quantity, the first temperature difference value information which is continuously accumulated, adjusts the output power according to the accumulated deviation value, so that the difference value between the current temperature and the first working temperature information tends to be zero;

and the differential control quantity of the output power is used for adjusting the output power according to the change value of the first temperature difference value information each time, and controlling the adjustment quantity of the output power to reduce the difference oscillation amplitude of the current temperature and the first working temperature information.

In this scheme, adjust output, specifically do:

calculating to obtain a first output power value according to the output power adjustment control amount, wherein the first output power value is used for charging the power storage equipment by the charging power output unit;

and adjusting the resistance value of the digital adjustable rheostat according to a preset communication instruction to enable the output power value of the charging power output unit to reach a first output power value.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be considered as limiting the scope.

Fig. 1 shows a block diagram of a configuration of the intelligent charging control circuit according to an embodiment of the present invention;

fig. 2 shows a circuit connection structure diagram of the charging power output unit according to the embodiment of the present invention;

fig. 3 shows a circuit connection structure diagram of the temperature detection control unit according to an embodiment of the present invention;

fig. 4 shows another circuit connection structure diagram of the temperature detection control unit according to the embodiment of the present invention;

fig. 5 shows a circuit connection structure diagram of the electric quantity detection control unit according to the embodiment of the present invention;

fig. 6 shows another circuit connection structure diagram of the electric quantity detection control unit according to the embodiment of the present invention;

fig. 7 shows a schematic diagram of the intelligent charging control method according to the embodiment of the present invention;

fig. 8 is a schematic diagram of the method for obtaining the first prediction information according to the embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The terms "first," "second," and the like, as used in embodiments of the present invention, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Nor does the terms "a," "an," or "the" or similar terms mean a limitation of quantity, but rather that at least one is present. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps preceding or following the methods of embodiments of the present invention are not necessarily performed in a sequential order. Rather, the various steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

Referring to fig. 1, fig. 1 shows a block diagram of a configuration of the intelligent charging control circuit according to an embodiment of the invention.

As shown in fig. 1, the first aspect of the present invention discloses that the intelligent charging control circuit includes:

the charging information acquisition and analysis unit 102 is configured to acquire a charging record and first power information of the power storage device, obtain first prediction information of a charging operation, and transmit the first prediction information to the electric quantity detection control unit;

the electric quantity detection control unit 104 comprises an electric quantity detection circuit of the electric storage equipment, and is used for acquiring current electric quantity information of the electric storage equipment and receiving first prediction information from the charging information acquisition and analysis unit, and analyzing to obtain second power information and first working temperature information of the electric storage equipment; the electric quantity detection control unit transmits the second power information and the first working temperature information to the temperature detection control unit;

a temperature detection control unit 106 including at least one temperature detection element for acquiring current temperature information of the power storage device; the temperature detection control unit receives the second power information and the first working temperature information transmitted by the electric quantity detection control unit, calculates the difference value between the current temperature information and the first working temperature information to obtain first temperature difference value information, and calculates the output power regulation control quantity of the charging equipment by using the first temperature difference value information so as to regulate the output power of the charging power output unit;

A charging power output unit 108 for receiving the output power adjustment control amount transmitted by the temperature detection control unit to adjust the output power;

and an electrical storage device 110 for storing electric energy from the charging power output unit.

The processor may be provided in the carrier of the charging device, the charging conductor, or the power storage device as a core of the control circuit. The electrical storage device 110 is often referred to as a battery. The charging device generally refers to a charger, and is a device for accessing a power supply, such as 220V mains supply or other electric energy output. The charging conductor is often referred to as a charging wire, such as a USB interface wire, a TYPE-C interface wire, a Lightning interface wire, or the like. The carrier of the electric storage device is a device that uses the electric storage device as a power supply source, such as a portable notebook computer, a tablet, a cellular phone, a smart watch, or the like. The processor is used as the core of the control circuit and used for acquiring the physical information of the battery, controlling and adjusting the charging power, and achieving the effects of ensuring the safety of the battery, prolonging the service life of the battery and ensuring the charging speed. First, the processor acquires a charge record of the battery and a highest charge power allowed by the battery through the charge information acquisition and analysis unit 102, and predicts a charge duration and a target end power of a current charging operation according to the charge record. Next, the processor obtains current electric quantity information of the battery through the electric quantity detection control unit 104, and calculates a real-time upper limit value of allowable output power under the current electric quantity condition and a highest working temperature value under the charging condition of the upper limit value of the output power according to a difference value between the current electric quantity and the predicted target electric quantity and the predicted charging duration. Then, the processor obtains the current temperature value of the battery through the temperature detection unit 106, calculates the adjustment amount of the output power through the difference value between the current temperature value and the highest working temperature value, and is used for controlling the charging power output unit 108 to adjust the output power so as to supplement electric energy to the battery. After the output power is adjusted, the processor continuously measures the electric quantity information and the temperature information of the battery, and adjusts the output power again, that is, the processor adaptively adjusts the output power according to the real-time state of the battery to charge the battery.

Referring to fig. 2, fig. 2 shows a circuit connection structure diagram of the charging power output unit according to an embodiment of the invention.

According to an embodiment of the present invention, a charging power output unit includes:

the power supply pin of the adjustable voltage stabilizing chip U1 is connected with the positive electrode of the first polarity capacitor C1; the switch input pin of the adjustable voltage stabilizing chip U1 is connected with one end of the power inductor L1, and the other end of the power inductor L1 is connected with the positive electrode of the first polarity capacitor C1; the voltage output pin of the adjustable voltage stabilizing chip U1 is connected with the positive electrode of the second polar capacitor C2 and connected with the first end of the first resistor R1; the feedback pin of the adjustable voltage stabilizing chip U1 is connected with the second end of the first resistor R1 and the first end of the second resistor R2, and the second end of the second resistor R2 is grounded; the cathodes of the first polar capacitor C1 and the second polar capacitor C2 are grounded.

It should be noted that the voltage stabilizing chip is an integrated circuit chip for stabilizing the power supply voltage and ensuring that a constant voltage is output under different load conditions. The voltage stabilizing chip can automatically adjust current according to the change of the power supply voltage so as to keep the output voltage unchanged. The adjustable voltage stabilizing chip is a chip for adjusting a voltage stabilizing output value according to a feedback signal. The embodiment of the invention shows a working circuit of an adjustable voltage stabilizing chip, wherein a voltage value divided by a first resistor R1 and a second resistor R2 is connected to a feedback pin FB, and the feedback pin FB adjusts a voltage stabilizing output value according to a real-time voltage value. That is, the voltage value of the feedback pin FB is adjusted by adjusting the resistance values of the first resistor R1 and the second resistor R2, so as to achieve the purpose of adjusting the regulated output value.

It should be noted that the present invention further includes:

at least one of the first resistor R1 and the second resistor R2 is a digital adjustable varistor, and the resistance value of the digital adjustable varistor is adjusted by a preset instruction;

the first resistor R1 and the second resistor R2 are formed by connecting one or more resistors in series or in parallel.

It should be noted that, the processor can adjust the resistance value of the digital adjustable rheostat in real time through a preset instruction.

As one embodiment, the first resistor R1 and the second resistor R2 are formed by connecting one or more resistors in series, so that the adjustment resistance range is increased, and the effect of increasing the output power adjustment range is achieved. For example, the first resistor R1 is formed by connecting an adjustable varistor and a fixed-resistance resistor in series, wherein the adjustable varistor has an adjustment range of 0-100 resistance units, the fixed-resistance resistor has a resistance of 50 resistance units, and the series connection of the adjustable varistor and the fixed-resistance resistor has a resistance range of 50-150 resistance units.

As one embodiment, the first resistor R1 and the second resistor R2 are formed by connecting one or a plurality of resistors in series, so that the adjustment output precision is improved, and the effect of improving the output power adjustment precision is achieved. For example, assuming that the adjustable varistor has an adjustment level of 100, for an adjustable varistor having an adjustment range of 0-200 resistance units, the adjustment step is 2 resistance units; two adjustable varistors with the adjusting range of 0-100 resistance units are used for series connection, the adjusting range after combination is 0-200 resistance units, and the adjusting step is 1 resistance unit.

Referring to fig. 3, fig. 3 shows a circuit connection structure diagram of the temperature detection control unit according to an embodiment of the invention.

According to an embodiment of the present invention, the temperature detection control unit includes:

the temperature detection element is a thermistor;

As shown in fig. 3, the temperature detection control unit includes: the temperature measuring device comprises a thermistor NTC, a temperature measuring voltage dividing resistor R11, a first filter resistor R12 and a first filter capacitor C11. One end of the thermistor NTC is grounded, and the other end of the thermistor NTC is connected with a temperature-measuring voltage-dividing resistor R11; the other end of the temperature measuring voltage dividing resistor is connected with a working level VCC higher than the ground level; one end of the first filter resistor R12 is connected with the thermistor NTC, and the other end of the first filter resistor R12 is connected with one end of the processor and one end of the first filter capacitor C11 as a detection signal; the other end of the first filter capacitor C11 is grounded. The first filter resistor R12 and the first filter capacitor C11 are unnecessary components of the temperature detection control unit, and the first filter resistor R12 and the first filter capacitor C11 form an RC filter circuit, so that the stability of the voltage of the measurement point is improved. The thermistor NTC and the temperature measuring voltage dividing resistor R11 are connected in series to work under the VCC voltage, the voltage values of the two ends of the thermistor NTC can be calculated through a digital-to-analog conversion module of the processor, and the resistance value of the thermistor NTC can be calculated through the voltage dividing theorem. And then the temperature value of the thermistor can be checked according to a preset thermistor resistance thermometer.

Referring to fig. 4, fig. 4 shows another circuit connection structure diagram of the temperature detection control unit according to an embodiment of the invention.

It should be noted that the temperature detection control unit further includes:

the temperature detection element is a temperature sensor;

the temperature sensor is in communication connection with the processor, and the processor reads the temperature output value of the temperature sensor through a preset communication protocol.

The temperature sensor may be a sensor for detecting temperature, such as DS18B 20. The processor is communicated with the temperature sensor through a preset instruction, and the processor obtains the temperature value of the temperature sensor through the preset instruction. In addition, the temperature detection element is abutted with an object to be measured, and the object to be measured comprises, but is not limited to, an electric storage device, an electric conductor and a charging device.

Referring to fig. 5, fig. 5 shows a circuit connection structure diagram of the electric quantity detection control unit according to an embodiment of the present invention.

According to an embodiment of the present invention, the electric quantity detection control unit includes:

As shown in fig. 4, the power detection control unit includes: the electric quantity detection resistor R21, the electric quantity voltage dividing resistor R22, the second filter resistor R23 and the second filter capacitor C21. One end of the electric quantity detection resistor R21 is connected with the negative electrode of the electric storage device and is connected with the ground, the other end of the electric quantity detection resistor R21 is connected with the electric quantity voltage dividing resistor R22, and the other end of the electric quantity voltage dividing resistor R22 is connected with the positive electrode of the electric storage device; one end of the second filter resistor R23 is connected with the electric quantity detection resistor R21, and the other end of the second filter resistor R23 is connected with one end of the processor and one end of the second filter capacitor C21 as a detection signal; the other end of the second filter capacitor C21 is grounded. The second filter resistor R23 and the second filter capacitor C21 are unnecessary components of the electric quantity detection control unit, and the second filter resistor R23 and the second filter capacitor C21 form an RC filter circuit, so that the stability of the voltage of the measuring point is improved. The electric quantity detection resistor R21 and the electric quantity voltage dividing resistor R22 are connected in series to work at the positive and negative ends of the electric storage device, the voltage value at the two ends of the electric quantity detection resistor R21 can be calculated through a digital-to-analog conversion module of the processor, and the voltage value of the positive and negative ends of the electric storage device can be calculated through a voltage dividing theorem. In general, in an actual measurement circuit application, the voltage value across the power storage device is regarded as electric quantity information.

Referring to fig. 6, fig. 6 shows another circuit connection structure diagram of the electric quantity detection control unit according to the embodiment of the present invention.

It should be noted that the electric quantity detection control unit further includes:

the electric quantity acquisition element is an electric quantity acquisition chip.

And the collection ports of the electric quantity collection chip are respectively connected with the anode and the cathode of the electric storage device, and the communication ports of the electric quantity collection chip are in communication connection with the processor.

It should be noted that, the processor is connected with the electric quantity acquisition chip through a preset instruction communication protocol, and the processor reads the electric quantity information of the electric storage device acquired by the electric quantity acquisition chip through a preset instruction.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating the intelligent charging control method according to the embodiment of the invention.

As shown in fig. 7, the second aspect of the present invention discloses the intelligent charging control method, which includes:

s702, detecting a connection state of the power storage device and the charging device, and when the connection state is the connection state;

s704, acquiring a charging record and first power information of the power storage device;

s706, obtaining first prediction information according to the charging record of the power storage equipment and the first power information;

S708, acquiring current electric quantity information of the power storage equipment, and analyzing to obtain second power information and first working temperature information by combining the acquired first prediction information and first power information;

s710, acquiring current temperature information of the power storage equipment, calculating a difference value between the current temperature information and the first working temperature information to obtain first temperature difference value information, and calculating an output power adjustment control amount according to the first temperature difference value information;

s712, according to the output power adjustment control quantity, output power information is obtained, the output power of the charging power output unit is adjusted, and the electric storage equipment is charged;

s714, when the charging is finished, generating and storing charging information;

the second power information is a dynamic charging power value obtained by calculating according to the current electric quantity information of the electric storage device, and is used as a real-time upper limit value of the output power. The first operating temperature information is the highest operating temperature when the second power information is used for charging the power storage equipment in the current charging of the power storage equipment. When the charging device is not connected to the electric storage device, indicating that the charging device is not in a charging state; and when the charging equipment is connected to the power storage equipment through the electric conductor, the charging equipment is indicated as a connection state. Generally, the charging device refers to a charger, the conductive body refers to a charging wire, and the electric storage device refers to a battery. The charger is connected to the battery through the charging wire, and when the charger is connected to the power supply, the charger is indicated to enter a connection state. The power supply is usually 220V mains supply or other electric energy output equipment. The processor acquires the date, the starting time, the charging duration, the starting electric quantity and the ending electric quantity in the battery charging record, so that the charging habit of a user on the battery charging can be analyzed, whether the current time of entering the connection state is the time of high-frequency charging of the user or not is judged, and if yes, the charging duration and the ending electric quantity of the current charging operation are predicted according to the charging duration, the starting electric quantity and the ending electric quantity in the charging record. After acquiring the current electric quantity information, the processor calculates the dynamic charging power value of the battery in the current electric quantity value state according to the predicted charging time length, the target ending electric quantity and the highest allowable charging power, and uses the dynamic charging power value as the real-time upper limit value of the output power, and queries the highest working temperature during the real-time upper limit power charging through a preset power upper limit value and working temperature table. After the processor acquires the current temperature value of the battery, the difference value between the current temperature value and the highest working temperature is calculated, and the output power regulating quantity is calculated by using the difference value. The processor obtains the power value to be output according to the output adjustment quantity, and then the charging power output unit is controlled to adjust the output power so as to charge the battery. After the output power is regulated, the processor acquires the electric quantity information and the temperature information of the battery again, and the flow step of regulating the output power is executed again. Therefore, the processor can adaptively adjust the output power according to the real-time state of the battery to charge the battery, thereby achieving the effects of ensuring the safety of the battery, prolonging the service life of the battery and ensuring the charging speed.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating the method for obtaining the first prediction information according to the embodiment of the present invention.

In the embodiment of the present invention, the obtaining the first prediction information specifically includes:

s802, acquiring a charging record and first power information of the power storage equipment;

s804, judging whether the current date and the starting time are a high-frequency charging time period according to the date, the starting time, the charging duration, the starting electric quantity and the ending electric quantity in the charging record:

s806, if so, analyzing to obtain target ending electric quantity and charging duration of the current charging operation by combining the ending electric quantity and the charging duration in the charging record, and taking the target ending electric quantity and the charging duration as first prediction information;

s808, if not, calculating according to the first power information to obtain first prediction information.

Note that, the charging record includes: date, start time, charge duration, start power, end power. The first power information is the highest charge power allowed by the electrical storage device. The first prediction information comprises a charging duration and a target ending electric quantity in the current date and starting time state. The processor judges whether the current date and the start time are the high-frequency charging time period, and analyzes whether there are a plurality of consecutive days in the charging record, and charges the electric storage device in the current time period. For example, the record of charging the battery from 10 to 11 in the morning occurs for a plurality of consecutive days, and the charge end power is about 85%, which may indicate that the user charges the battery frequently in this period, the average charging duration is 60 minutes, and the charge end power is required to be 85%. In contrast, if the current time for entering the battery to enter the connection state is about 10 a.m., that is, the current charging period belongs to the high-frequency charging period, the charging duration is predicted to be 60 minutes, and the target ending electric quantity is predicted to be 85%; if the connection state is not entered before and after 10 points, the default power storage device is charged at the fastest speed, that is, the target ending electric quantity is set to 100%, and the charging duration is not limited as the first prediction information.

It should be noted that the obtaining the first prediction information further includes:

according to the date, the starting time, the charging duration, the starting electric quantity and the ending electric quantity in the charging record, whether the current date is the first working day set by the user or not:

if so, analyzing and obtaining the target ending electric quantity and the charging duration of the current charging operation by combining the ending electric quantity and the charging duration in the charging record, and taking the target ending electric quantity and the charging duration as first prediction information;

if not, calculating according to the first power information to obtain first prediction information.

The first working day is a non-legal day of rest in the region where the user of the power storage device is located or a non-day of rest set by the user of the power storage device. Generally, at the first working day, the charging condition of the power storage device by the power storage device user has high consistency, so that it can be determined whether the first working day is the basis for analyzing the charging habit. If the current date is the first working day, counting the time length and the end electric quantity of each charging in the record of the current period charging under the first working day, analyzing whether the user of the electric storage equipment prefers to charge the electric storage equipment to full charge or to a certain electric quantity percentage, and calculating the average charging time length, wherein the target end electric quantity and the charging time length can be used as first prediction information; if not, the default electric storage device is charged at the fastest speed, that is, the target end electric quantity is set to 100%, and the charging duration is not limited as the first prediction information.

according to the date, the starting time, the charging duration, the starting electric quantity and the ending electric quantity in the charging record, whether the charging time period is a high-frequency charging time period is analyzed:

if yes, calculating according to the first power information to obtain first prediction information.

The processor analyzes the charging frequency of the user of the electric storage device. For example, in two or more days before the current date, the electric storage device records the charge record from the low initial electric quantity to the high end electric quantity twice or more, and then indicates that the current period is the first use period of heavy use of the electric storage device by the electric storage device user, and the electric quantity of the electric storage device needs to be quickly replenished. Therefore, if it is determined that the first use period, the default electric storage device is charged at the fastest speed, that is, the target end electric quantity is set to 100%, and the charging duration is not limited as the first prediction information.

In the embodiment of the invention, first prediction information is obtained according to the charging record and the first power information of the electric storage equipment, specifically:

the charging record is stored in a local or cloud end;

The charging record may be stored locally, for example, in a charger, or a carrier for an electrical storage device, a notebook computer, a tablet, a cell phone, a smart watch, or the like. The charger or carrier will perform an analysis of the charging habits based on the charging records. The charging records can also be stored in the cloud server, the processor sends the ID information of the power storage equipment to the cloud server, the cloud server searches the corresponding charging records according to the ID information and analyzes the charging habits, and then the analysis result is returned to the server.

In the embodiment of the present invention, the obtaining the second power information and the first operating temperature information when the second power information is charged specifically includes:

According to the current electric quantity information, the charging duration in the first prediction information and the target ending electric quantity, a first charging speed and a second charging speed are obtained through calculation, and whether the first charging speed is larger than the second charging speed or not is judged;

the first charging speed is a charging speed when charging using the first power information. The second charging speed is calculated according to the current electric quantity information, the charging duration in the first prediction information and the target ending electric quantity. Assuming that the current electric quantity is 20%, the target ending electric quantity is 80%, and the charging time is 30 minutes, the currently required charging speed is 2% per minute. Assuming that the fastest charging speed calculated by the first power information is 1.5% per minute, the first power information is taken as the second power information since the required charging speed is greater than the fastest charging speed; assuming that the fastest charging speed calculated by the first power information is 3% per minute, since the required charging speed is smaller than the fastest charging speed, the charging power is converted into the second power information at a charging speed of 2% per minute. Optionally, in practical application, as the current power gradually rises to 100%, the second power information will be 0W accordingly. Under the condition of high electric quantity, low charging power is used, the purpose of over-charging protection of the electric storage equipment is achieved, and the service life of the electric storage equipment is prolonged.

In the embodiment of the present invention, the calculating the difference between the current temperature information and the first operating temperature information obtains first temperature difference information, and calculates the output power adjustment control amount according to the first temperature difference information, which specifically includes:

the output power proportion control quantity is used for adjusting output power according to the current first temperature difference value information, so that the difference value between the current temperature and the first working temperature is reduced;

the output power integration control quantity is used for continuously accumulating the first temperature difference value information, and adjusting the output power according to the accumulated deviation value so that the difference value between the current temperature and the first working temperature tends to be zero;

and the output power differential control quantity is used for adjusting the output power according to the change value of the first temperature difference value information every time, and controlling the adjustment quantity of the output power to reduce the difference oscillation amplitude of the current temperature and the first working temperature.

The calculation formula of the output power adjustment control amount is as follows:

；

wherein:

representing the output power adjustment control amount at time t;

-information representative of said first temperature difference at time t;

representing the output power proportional control quantity at time t, wherein +.>Representing a proportional control quantity coefficient;

representing the output power integral control quantity at time t, wherein +.>The coefficient of the integral control amount is represented,represents +.>Is an integral of (a);

representing the differential control quantity of the output power at time t, wherein +.>Representing the coefficient of the differential control amount,representing +.>Is a differential of (a).

Alternatively, in practical applications, the influence of the output power proportional control amount, the output power integral control amount, and the output power differential control amount on the final output power control amount is generally adjusted using a control coefficient as a weight. By adjusting the proportional control quantity coefficient according to the weighted characteristicAdjusting the oscillation amplitude of the temperature curve; by adjusting the integral control quantity +.>And the integral control amount->And adjusting the oscillation frequency of the temperature curve.

In the embodiment of the invention, the output power is adjusted specifically as follows:

It should be noted that, the calculation formula of the first output power value is:

；

wherein:representing the first output power value at time t; />Representing the output power adjustment control amount at time t; />Representing said second power information at time t.

First output power valueIs to adjust the control amount according to the current output power +.>And second power informationIs obtained by comparing the sizes of the above. And then processing the output voltage value according to the output power value, converting the output voltage value, and adjusting the resistance value of the digital adjustable rheostat, so that the power output unit supplements the electric energy of the electric storage equipment according to the set output power.

In summary, the intelligent charging control method provided by the embodiment of the invention is applied to the charging operation of the electric storage equipment, and when the electric storage equipment is in a connection state with the charging equipment, the first prediction information is obtained according to the charging record and the first power information of the electric storage equipment; then, according to the current electric quantity information of the electric storage equipment, analyzing to obtain second power information and first working temperature information; secondly, calculating an output power adjustment control amount according to the current temperature information of the power storage equipment, and adjusting the output power of the charging power output unit to charge the power storage equipment; finally, when the disconnection state is judged, the operations of information acquisition and output power adjustment of the electric storage equipment are re-executed. According to the invention, the charging power is adaptively adjusted according to the current electric quantity information and the current temperature information of the electric storage equipment, so that the electric storage equipment is always in a state of a preset working temperature, and is charged with higher power, thereby ensuring the safety and the speed of the charging process and protecting the service life of the electric storage equipment. According to the method and the device, the charging habit of the user can be analyzed according to the charging record of the power storage equipment, the actual demand of the user on the charging process is predicted according to the charging habit, the charging process of the power storage equipment meets the expectations of the user, and the use experience of the user is improved.

In addition, functional modules in the embodiments of the present invention may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent charge control circuit, characterized in that the intelligent charge control circuit comprises:

2. The intelligent charge control circuit of claim 1, wherein the charge power output unit comprises:

the direct-current voltage stabilizing circuit is used for outputting adjustable constant voltage; at least comprises the following steps: an adjustable voltage stabilizing chip (U1), a power inductor (L1), a first polarity capacitor (C1), a second polarity capacitor (C2), a first resistor (R1) and a second resistor (R2);

the power supply pin of the adjustable voltage stabilizing chip (U1) is connected with the positive electrode of the first polarity capacitor (C1); the switch input pin of the adjustable voltage stabilizing chip (U1) is connected with one end of the power inductor (L1), and the other end of the power inductor (L1) is connected with the positive electrode of the first polarity capacitor (C1); the voltage output pin of the adjustable voltage stabilizing chip (U1) is connected with the positive electrode of the second polar capacitor (C2) and is connected with the first end of the first resistor (R1); the feedback pin of the adjustable voltage stabilizing chip (U1) is connected with the second end of the first resistor (R1) and the first end of the second resistor (R2), and the second end of the second resistor (R2) is grounded; the cathodes of the first polar capacitor (C1) and the second polar capacitor (C2) are grounded;

At least one of the first resistor (R1) and the second resistor (R2) is a digitally adjustable varistor.

3. The intelligent charge control circuit according to claim 1, wherein the temperature detection control unit includes:

the temperature detection element is a thermistor;

4. The intelligent charge control circuit according to claim 1, wherein the power detection control unit includes:

5. An intelligent charging control method applied to the intelligent charging control circuit according to any one of claims 1 to 4, comprising the following steps:

6. The method for intelligent charging control according to claim 5, wherein the obtaining the first prediction information specifically includes:

7. The intelligent charging control method according to claim 6, wherein the first prediction information is obtained according to the charging record of the power storage device and the first power information, specifically:

The charging record is stored in a local or cloud end;

8. The method of claim 5, wherein the obtaining the second power information and the first operating temperature information when the second power information is charged specifically includes:

9. The intelligent charging control method according to claim 5, wherein the calculating the difference between the current temperature information and the first operating temperature information obtains first temperature difference information, and calculating the output power adjustment control amount according to the first temperature difference information comprises:

10. The intelligent charging control method according to claim 5, wherein the output power is adjusted specifically as follows: