WO2024221154A1 - Power supply method, apparatus and system, and electric device, storage medium and program product - Google Patents

Abstract

The present application relates to a power supply method, apparatus and system, and an electric device, a storage medium and a program product. The method comprises: receiving request information sent by an electric device; according to the request information, determining a charging current and a discharging current of the electric device; and charging the electric device according to the charging current, and discharging the electric device according to the discharging current. By means of the present application, the accumulation of lithium ions at a negative electrode of a lithium battery can be eliminated in a timely manner, so that the problem of lithium plating caused by continuous large-current charging is prevented, thereby improving the charging speed.

Description

Power supply method, device, system, power-consuming equipment, storage medium and program product Technical Field

The present application relates to the field of power supply technology, and specifically to a power supply method, device, system, power-consuming equipment, storage medium and program product.

Background Art

With the development of new energy technologies, lithium batteries are increasingly used in electric vehicles. How to increase the charging speed of lithium batteries and shorten the charging time has become a difficult problem that must be overcome in the development of electric vehicles.

At present, the charging speed is often increased by increasing the DC output power of the charging pile. However, continuous high-current charging can easily cause lithium deposition in lithium batteries, resulting in limited improvement in charging speed.

Summary of the invention

Based on the above problems, the present application provides a power supply method, device, system, electrical equipment, storage medium and program product, which can promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, thereby avoiding the lithium plating problem caused by continuous charging with large current and improving the charging speed.

In a first aspect, the present application provides a power supply method, which is applied to a power supply system, and the method includes:

Receive request information sent by the electrical device; determine the charging current and discharging current of the electrical device according to the request information; charge the electrical device according to the charging current, and discharge the electrical device according to the discharging current.

In the technical solution of the embodiment of the present application, during the charging process of the electrical device, the electrical device is used to discharge, and the discharge current can promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, thereby avoiding the lithium precipitation problem caused by continuous charging with large currents. In addition, the polarization weakening phenomenon is eliminated, and the rechargeable battery can be protected, the charging rate is increased, and the charging speed is increased.

In some embodiments, the above-mentioned determining the charging current and discharging current of the power-consuming device according to the request information includes: determining the current amplitude of the charging current and the current amplitude and current frequency of the discharging current according to the current information carried in the request information. In the technical solution of the embodiment of the present application, the power supply system can quickly and accurately determine the charging current and discharging current of the power-consuming device, thereby improving the charging speed, or realizing the power consumption. The device's battery self-heats.

In some embodiments, when the request information includes a charging request, the charging current and the discharging current satisfy a first constraint condition, and the first constraint condition includes that the charging power is greater than the discharging power; when the request information includes self-heating, the charging current and the discharging current satisfy a second constraint condition, and the second constraint condition includes that the charging power is less than or equal to the discharging power. In the technical solution of the embodiment of the present application, the charging demand of the electric device can be met in the charging scenario, and the battery self-heating demand of the electric device can be met in the self-heating scenario.

In some embodiments, the power supply system includes an AC/DC converter and a DC converter, and charges the electrical device according to the charging current, and discharges the electrical device according to the discharging current, including: controlling the AC/DC converter to output the charging current to the electrical device to charge the electrical device; controlling the DC converter to obtain the discharge current output by the electrical device, and discharging the electrical device. In the technical solution of the embodiment of the present application, the lithium ion accumulation at the negative electrode of the lithium battery is eliminated in time by discharging during the charging process, thereby avoiding the lithium precipitation problem caused by continuous charging with a large current, and eliminating the weakened polarization phenomenon, which can also protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

In a second aspect, the present application provides a power supply method, which is applied to an electrical device, and the method includes:

Generate request information according to the battery status of the electric device; send the request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and discharging current of the electric device, charge the electric device according to the charging current, and discharge the electric device according to the discharging current.

In the technical solution of the embodiment of the present application, the electrical equipment can discharge during the charging process, promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, avoid the problem of lithium precipitation caused by continuous charging with large currents, and eliminate the weakening polarization phenomenon, protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

In some embodiments, the battery status includes the battery temperature; generating request information according to the battery status of the power-consuming device includes: generating request information according to the maximum charging current of the battery when the battery temperature is greater than or equal to a preset temperature threshold. In the technical solution of the embodiment of the present application, different request information is generated in different scenarios, which can meet the charging requirements and self-heating requirements of the power-consuming device, wherein the battery self-heating can quickly heat the battery from a low temperature to a suitable charging temperature, thereby improving the performance of the battery in a low temperature environment and extending the battery life.

In some embodiments, the method further includes: when the battery temperature is less than a preset temperature threshold, The current amplitude and frequency of the self-heating current are determined according to the battery temperature; and request information is generated according to the current amplitude and current frequency of the self-heating current. In the technical solution of the embodiment of the present application, different request information is generated in different scenarios to meet the charging requirements and self-heating requirements of the electrical equipment.

In a third aspect, the present application provides a power supply device, which is deployed in a power supply system, and the device includes:

An information receiving module, used for receiving request information sent by the electric device;

A current determination module, used to determine the charging current and discharging current of the electrical equipment according to the request information;

The power supply module is used to charge the electrical device according to the charging current and discharge the electrical device according to the discharging current.

In the technical solution of the embodiment of the present application, during the charging process of the electrical device, the electrical device is used to discharge, and the discharge current can promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, thereby avoiding the lithium precipitation problem caused by continuous charging with large currents. In addition, the polarization weakening phenomenon is eliminated, and the rechargeable battery can be protected, the charging rate is increased, and the charging speed is increased.

In a fourth aspect, the present application provides an electrical device, the device comprising:

An information generation module, used to generate request information according to the battery status of the power-consuming device;

The information sending module is used to send request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and discharging current of the electrical equipment, charge the electrical equipment according to the charging current, and discharge the electrical equipment according to the discharging current.

In the technical solution of the embodiment of the present application, the electrical equipment can discharge during the charging process, promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, avoid the problem of lithium precipitation caused by continuous charging with large currents, and eliminate the weakening polarization phenomenon, protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

In a fifth aspect, the present application provides a power supply system, which includes a connection interface and a controller; when the power supply system is connected to an electrical device through the connection interface, the controller executes the method of the first aspect.

In the technical solution of the embodiment of the present application, during the charging process of the electrical device, the electrical device is used to discharge, and the discharge current can promptly eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, thereby avoiding the lithium precipitation problem caused by continuous charging with large currents. In addition, the polarization weakening phenomenon is eliminated, and the rechargeable battery can be protected, the charging rate is increased, and the charging speed is increased.

In some embodiments, the power supply system further includes an AC-DC converter, a DC converter, and an energy storage battery; The first end of the AC/DC converter is connected to the power supply network, and the second end of the AC/DC converter is connected to the connection interface; the first end of the DC converter is connected to the connection interface, and the second end of the DC converter is connected to the energy storage battery; the controller is connected to the AC/DC converter, the DC converter and the energy storage battery respectively.

In a sixth aspect, the present application provides an electrical device, comprising a rechargeable battery, a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the method described in the second aspect when executing the computer program.

In a seventh aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the method described in the first aspect or the second aspect is implemented.

In an eighth aspect, the present application provides a computer program product, including a computer program, characterized in that when the computer program is executed by a processor, the method described in the first aspect or the second aspect is implemented.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the optional embodiments below. The accompanying drawings are only used for the purpose of illustrating the optional embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

FIG1 is a schematic diagram of the architecture of a power supply method according to an embodiment of the present application;

FIG2 is a schematic diagram of a flow chart of a power supply method according to an embodiment of the present application;

FIG3 is one of the current waveform diagrams according to an embodiment of the present application;

FIG4 is a second current waveform diagram of an embodiment of the present application;

FIG5 is a schematic flow chart of a power supply method according to another embodiment of the present application;

FIG6 is a structural block diagram of a power supply device according to an embodiment of the present application;

FIG7 is a structural block diagram of an electric device according to another embodiment of the present application;

FIG8 is a schematic diagram of a power supply system according to an embodiment of the present application;

FIG9 is a second structural schematic diagram of a power supply system according to an embodiment of the present application;

FIG. 10 is a schematic diagram of the structure of an electrical device according to an embodiment of the present application.

DETAILED DESCRIPTION

The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the connection between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

With the development of new energy technologies, lithium batteries are increasingly being used in electric vehicles. How to increase the charging speed of lithium batteries and shorten the charging time has become a challenge that must be overcome in the development of electric vehicles. At present, the charging speed is often increased by increasing the DC output power of the charging pile. However, continuous high-current charging can easily cause lithium deposition in lithium batteries, resulting in limited improvement in charging speed, and even reducing the service life of lithium batteries, causing serious safety issues.

The present application provides a power supply scheme, in which the power supply system receives request information sent by the power-consuming device; determines the charging current and discharging current of the power-consuming device according to the request information; charges the power-consuming device according to the charging current, and discharges the power-consuming device according to the discharging current. In this way, in the process of the power supply system using a large current to charge the power-consuming device, the power-consuming device can use a small current to discharge, thereby timely eliminating the accumulation of lithium ions at the negative electrode of the lithium battery and eliminating the weakening polarization phenomenon, which can not only increase the charging rate and thus increase the charging speed; but also protect the safety of the lithium battery in the power-consuming device, thereby extending the service life of the lithium battery and avoiding inducing serious safety problems.

The power supply scheme disclosed in the embodiment of the present application can be applied to the architecture shown in FIG1, which includes a power supply system 11 and an electric device 12; the power supply system 11 and the electric device 12 are detachably connected through an interface. The power supply system 11 can be connected to the power grid, and a storage battery can also be provided. The electric device 12 can include but is not limited to vehicles, ships or aircraft, etc., and a rechargeable battery is provided in the electric device 12.

According to some embodiments of the present application, with reference to FIG. 2 , a power supply method is provided. The method is described by taking the power supply system shown in FIG. 1 as an example. The method may include the following steps:

Step 201: receiving request information sent by an electric device.

Among them, the request information is used to instruct the power supply system to take corresponding power supply measures. The request information may include request content and current information. The request content may include charging and self-heating, etc. The current information may include current amplitude and current frequency, etc. The embodiment of the present application does not limit the request information and can be set according to actual conditions.

After the power supply system is connected to the power-consuming device through the interface, it first outputs a wake-up signal to wake up the power-consuming device. After that, the power supply system performs a charging handshake with the power-consuming device and configures the charging parameters. After that, it enters the charging stage. The power-consuming device sends request information to the power supply system according to the charging demand; the power supply system receives the request information sent by the power-consuming device.

Taking the power supply system as a storage and charging station and the power-consuming equipment as an electric vehicle as an example, after the user inserts the charging gun of the storage and charging station into the charging port of the electric vehicle, the storage and charging station sends a wake-up signal to the electric vehicle through the charging gun to wake up the electric vehicle. After that, the storage and charging station performs a charging handshake with the electric vehicle; then, the storage and charging station sends charging parameters such as the maximum charging current and the maximum charging voltage to the electric vehicle, and the electric vehicle sends charging parameters such as the maximum charging current allowed by the rechargeable battery to the storage and charging station. The embodiment of the present application does not limit the charging parameters transmitted during the charging parameter configuration process, and can be set according to actual conditions. After that, entering the charging stage, the electric vehicle sends request information to the power supply system according to the charging needs, and the storage and charging station receives the request information sent by the electric vehicle.

Step 202: Determine the charging current and discharging current of the electrical device according to the request information.

The power supply system may pre-set a corresponding relationship between the charging current and the discharging current, and the corresponding relationship may include the relationship between the current amplitude, current frequency, and duty cycle of the charging current and the discharging current. After receiving the request information, the power supply system determines the charging current and the discharging current of the electrical device according to the request information and the above corresponding relationship.

Still taking the power supply system as a storage and charging station and the power consumption equipment as an electric vehicle as an example, the pre-set correspondence in the storage and charging station includes the ratio of the current amplitude of the charging current to the current amplitude of the discharging current being 1:N; after receiving the request information, the storage and charging station can determine that the current amplitude of the charging current is I1 and the current amplitude of the discharging current is I2 according to the request information, and |I1|=|I2/N|. The embodiment of the present application does not limit the correspondence between the charging current and the discharging current, and can be set according to actual conditions.

Step 203, charging the electrical device according to the charging current, and discharging the electrical device according to the discharging current.

After determining the charging current and discharging current of the electric device, the power supply system charges the electric device according to the charging current. During the charging process, the power supply system also discharges the electric device according to the discharging current, thereby responding to requests such as charging and self-heating of the electric device.

For example, the charging station charges the electric vehicle according to the charging current, and discharges the electric vehicle according to the discharging current, thereby charging the electric vehicle or realizing self-heating of the battery of the electric vehicle.

In the above power supply method, the power supply system receives request information sent by the power-consuming device; determines the charging current and discharging current of the power-consuming device according to the request information; charges the power-consuming device according to the charging current, and The discharge current uses an electrical device to discharge. Through the embodiments of the present application, in the process of charging the electrical device, the electrical device is used to discharge, and the discharge current can timely eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, thereby avoiding the lithium precipitation problem caused by continuous charging with a large current, and eliminating the weakened polarization phenomenon, and can also protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

According to some embodiments of the present application, the process of determining the charging current and discharging current of the electrical device according to the request information may include: determining the current amplitude of the charging current and the current amplitude and current frequency of the discharging current according to the current information carried in the request information. The current information carried in the request information includes the current amplitude and the current frequency.

The power supply system pre-sets a first corresponding relationship between the current amplitude carried by the request information and the current amplitude of the charging current and the current amplitude of the discharging current, and a second corresponding relationship between the current frequency carried by the request information and the current frequency of the discharging current.

The power supply system receives the request information sent by the power-consuming device, determines the current amplitude of the charging current and the current amplitude of the discharging current according to the current information carried in the request information and the above-mentioned first corresponding relationship; and determines the current frequency of the discharging current according to the above-mentioned second corresponding relationship.

For example, the current amplitude carried by the request information is Ix, and the current frequency is fx. The power supply system determines the current amplitude of the charging current I1=Ix and the amplitude of the discharging current I2=-1.5*Ix according to the first corresponding relationship; and determines the current frequency f=fx of the discharging current according to the second corresponding relationship.

In some embodiments of the present application, the current information carried by the request information may also include a duty cycle. Referring to FIG3 , the charging current is a current with a constant current amplitude of I1, and the discharging current is a current with a current amplitude of I2, a current frequency of f, and a duty cycle of 50%. When the power supply system responds to the request information by charging and discharging, the charging current and the discharging current are superimposed to form a superimposed current.

In the above embodiment, the power supply system determines the current amplitude of the charging current and the current amplitude and current frequency of the discharging current according to the current information carried in the request information. Through the embodiment of the present application, the power supply system can quickly and accurately determine the charging current and discharging current of the power-consuming device, thereby improving the charging speed, or realizing the self-heating of the battery of the power-consuming device, wherein the battery self-heating can make the battery quickly heat up from a low temperature to a suitable charging temperature, thereby improving the performance of the battery in a low temperature environment and extending the battery life.

In some embodiments of the present application, when the request information includes a charging request, the charging current and the discharging current satisfy a first constraint condition, and the first constraint condition includes that the charging power is greater than the discharging power; when the request information includes self-heating, the charging current and the discharging current satisfy a second constraint condition, and the second constraint condition includes that the charging power is less than or equal to the discharging power.

In practical applications, the power supply system can charge the electrical equipment, and can also supply power to the electrical equipment to use the electrical equipment for self-heating of the rechargeable battery.

In some of these scenarios, the power-consuming device determines the charging current and discharging current that meet the first constraint condition according to the charging demand, and generates request information according to the current information of the charging current and the discharging current; then, the power-consuming device sends the request information to the power supply system. The power supply system determines that the power-consuming device needs to be charged according to the request information, and determines the current amplitude of the charging current, the current amplitude, current frequency and duty cycle of the discharging current according to the current information carried in the request information.

The above-mentioned first constraint condition may include that the charging capacity is greater than the discharging capacity. Referring to Figure 3, the charging capacity Q1 = |I1*t1|, the discharging capacity Q2 = |I2*t2|, |I1*t1|＞|I2*t2|, wherein the current amplitude of the charging current I1 = Ix, the current amplitude of the discharging current I2 = -1.5*Ix, the current frequency f = fx, and the duty cycle is 50%, which can realize charging of electrical equipment.

In some of these scenarios, the power-consuming device determines the charging current and discharging current that meet the second constraint condition based on the self-heating demand, and generates request information based on the current information of the charging current and the discharging current; then, the power-consuming device sends the request information to the power supply system. The power supply system determines that the power-consuming device needs self-heating based on the request information, and determines the current amplitude of the charging current, the current amplitude, current frequency, and duty cycle of the discharging current based on the current information carried in the request information.

The second constraint condition includes that the charging capacity is less than or equal to the discharging capacity. Referring to FIG4 , the charging capacity Q1=|I1*t1|, the discharging capacity Q2=|I2*t2|, |I1*t1|≤|I2*t2|, wherein the current amplitude of the charging current I1=Ix, the current amplitude of the discharging current I2=-2*Ix, the current frequency f=fx, and the duty cycle is 50%. In this way, an alternating positive and negative oscillating current is obtained at the electrical device. When the temperature of the rechargeable battery in the electrical device is too low, the oscillating current can generate heat through the internal impedance of the battery to heat the entire battery, thereby realizing self-heating of the battery of the electrical device.

In the above embodiment, when the request information includes a charging request, the charging current and the discharging current satisfy the first constraint condition, and when the request information includes self-heating, the charging current and the discharging current satisfy the first constraint condition. The embodiment of the present application determines the charging current and the discharging current based on the above-mentioned first constraint and the second constraint, which can meet the charging demand of the electric device in the charging scenario and meet the battery self-heating demand of the electric device in the self-heating scenario, wherein the battery self-heating can quickly heat the battery from a low temperature to a suitable charging temperature, thereby improving the performance of the battery in a low temperature environment and extending the battery life.

According to some embodiments of the present application, the power supply system includes an AC-DC converter and a DC converter. The above process of charging the electrical device according to the charging current and discharging the electrical device according to the discharging current may include: controlling the AC-DC converter to output the charging current to the electrical device to charge the electrical device; controlling the DC converter to obtain the discharge current output by the electrical device to discharge the electrical device.

The power supply system may include an AC/DC converter (ACDC, Alternating Current/Direct Current), a DC converter (DCDC, Direct Current/Direct Current), a connection interface, an energy storage battery and a controller. Among them, the first end of the AC/DC converter is connected to the power grid, and the second end of the AC/DC converter is connected to the connection interface; the first end of the DC converter is connected to the energy storage battery, and the second end of the DC converter is connected to the connection interface; the connection interface can be connected to the power consumption device. The AC/DC converter can convert the AC current input from the power supply grid into DC current, and output the DC current to the power consumption device. The DC converter can be a bidirectional converter, that is, it can convert the DC current output from the power consumption device, and input the converted DC current into the energy storage battery for storage; it can also convert the DC current output from the energy storage battery, and input the converted DC current into the power consumption device.

The controller is connected to the AC/DC converter, the DC converter and the energy storage battery respectively. The controller receives the request information sent by the electric device through the connection interface, and determines the charging current and discharging current of the electric device according to the request information; then, the controller controls the AC/DC converter and the DC converter to work, that is, controls the AC/DC converter to output the charging current to the electric device to charge the electric device; controls the DC converter to obtain the discharging current output by the electric device to discharge the electric device.

In the above embodiment, the power supply system includes an AC/DC converter and a DC converter. The power supply system controls the AC/DC converter to output charging current to the power-consuming device to charge the power-consuming device; and controls the DC converter to obtain the discharge current output by the power-consuming device to discharge the power-consuming device. The embodiment of the present application timely eliminates the accumulation of lithium ions at the negative electrode of the lithium battery by discharging during the charging process, thereby avoiding the lithium precipitation problem caused by continuous charging with large currents, and eliminating the weakened polarization phenomenon, thereby protecting the rechargeable battery and improving the charging rate. Thereby increasing the charging speed.

According to some embodiments of the present application, a power supply method is provided with reference to FIG5. Taking the method applied to the power consumption device shown in FIG1 as an example, the method may include the following steps:

Step 301: Generate request information according to the battery status of the power-consuming device.

Among them, the battery status may include battery temperature, battery remaining power, etc., and the embodiment of the present application does not limit the battery status.

A detection device may be provided in the electrical device to detect the battery status. For example, the detection device includes a temperature sensor, a coulomb meter, etc.; the electrical device may detect the battery temperature through a temperature sensor, detect the consumed power through a coulomb meter, and determine the remaining battery power based on the consumed power. The embodiment of the present application does not limit the detection method of the battery status, and it may be set according to actual conditions.

After the power-consuming device is connected to the power supply system through an interface, it receives the wake-up signal output by the power supply system and is awakened. After that, the power-consuming device performs a charging handshake with the power supply system and configures the charging parameters. After the preparation is completed, the charging phase begins. The power-consuming device detects the battery status and generates request information based on the battery status. For example, if the battery needs to be charged, a charging request is generated, and if the battery needs to be self-heated, a self-heating request is generated.

Step 302, sending request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and discharging current of the electrical device, charge the electrical device according to the charging current, and discharge the electrical device according to the discharging current.

After the electric device generates the request information, it sends the request information to the power supply system. The power supply system receives the request information, determines the charging current and discharging current of the electric device according to the request information, and then charges the electric device according to the charging current and discharges the electric device according to the discharging current.

For example, if the power-consuming device is an electric vehicle and the power supply system is a storage and charging station, the electric vehicle detects the battery status, such as battery temperature and remaining battery power. Then, the electric vehicle generates request information based on the battery status and sends the request information to the storage and charging station. The storage and charging station determines the charging current and discharge current of the electric vehicle based on the request information. After that, the storage and charging station charges the electric vehicle based on the charging current and discharges the electric vehicle based on the discharge current.

In some embodiments of the present application, the power-consuming equipment is not limited to electric vehicles, and the power supply system includes storage and charging In addition to the station, there may also be charging piles, etc. The embodiments of the present application do not limit the electrical equipment and power supply system.

In the above power supply method, request information is generated according to the battery status of the power-consuming device; the request information is sent to the power supply system, instructing the power supply system to determine the charging current and discharging current of the power-consuming device, charge the power-consuming device according to the charging current, and discharge the power-consuming device according to the discharging current. In the embodiment of the present application, the power-consuming device generates request information, so that the power supply device can take corresponding power supply measures according to the request information, so that the power-consuming device can discharge during the charging process, timely eliminate the accumulation of lithium ions at the negative electrode of the lithium battery, avoid the problem of lithium precipitation caused by continuous charging with large current, and eliminate the weakening polarization phenomenon, protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

According to some embodiments of the present application, the battery status includes the battery temperature; the above process of generating request information based on the battery status of the electrical device may include: when the battery temperature is greater than or equal to a preset temperature threshold, generating request information based on the maximum charging current of the battery.

The power-consuming device can detect the battery temperature and compare the battery temperature with a preset temperature threshold; if the battery temperature is greater than or equal to the preset temperature threshold, it indicates that the battery is at a temperature suitable for charging, and the power-consuming device generates a request message based on the maximum charging current of the battery. Afterwards, the power-consuming device sends the request message to the power supply system.

The power supply system receives the request information, determines the charging requirements of the power-consuming device based on the request information, and determines the maximum charging current of the rechargeable battery. After that, the power supply system determines the charging current and discharging current of the power-consuming device based on the maximum charging current of the rechargeable battery; charges the power-consuming device based on the charging current, and discharges the power-consuming device based on the discharging current.

In some embodiments of the present application, the charging current and the discharging current of the electrical device satisfy a first constraint condition, and the first constraint condition includes that the charging power is greater than the discharging power.

The power-consuming device can adjust the current amplitude and current frequency of the charging current and the discharging current each time the request information is generated, and record the charging conditions of different current amplitudes and current frequencies. Then, the appropriate range of the current amplitude and current frequency is determined according to the recorded charging conditions, and the corresponding relationship between the charging current and the discharging current and the maximum charging current is established, and the corresponding relationship can be a table or a formula.

It can be understood that by recording the above information, the electrical device can be assisted to quickly and accurately generate request information, thereby improving the charging speed.

According to some embodiments of the present application, it may also include: when the battery temperature is less than a preset temperature threshold, determining the current amplitude and frequency of the self-heating current according to the battery temperature; and generating request information according to the current amplitude and current frequency of the self-heating current.

The electrical device can detect the battery temperature and compare the battery temperature with a preset temperature threshold; if the battery temperature is lower than the preset temperature threshold, it indicates that the battery is in a low temperature state and is not suitable for charging. The electrical device then looks up a table based on the battery temperature or uses a preset formula to determine the current amplitude and current frequency of the self-heating current used for battery self-heating, and generates request information based on the current amplitude and current frequency of the self-heating current.

For example, the electric vehicle detects that the battery temperature is -20°C, which is lower than the preset temperature threshold of 0°C. The electric vehicle then looks up the table based on the battery temperature of -20°C to determine that the current amplitude of the self-heating current is Ix and the current frequency is fx; and generates request information based on the current amplitude Ix and the current frequency fx of the self-heating current.

Afterwards, the power-consuming device sends the request information to the power supply system. The power supply system receives the request information, determines that the power-consuming device requires battery self-heating based on the request information, and determines the current amplitude and current frequency of the self-heating current. Afterwards, the power supply system determines the charging current and discharging current of the power-consuming device based on the current amplitude and current frequency of the self-heating current; charges the power-consuming device based on the charging current, and discharges the power-consuming device based on the discharging current, so that the charging current and the discharging current are superimposed at the power-consuming device to form an oscillating current, thereby using the power-consuming device to self-heat the battery, and then quickly heating the battery from a low temperature to a suitable charging temperature, thereby improving the performance of the battery in a low temperature environment and extending the battery life.

In some embodiments of the present application, the charging current and the discharging current of the electrical equipment satisfy a second constraint condition, and the second constraint condition includes that the charging power is less than or equal to the discharging power.

The electrical device can adjust the current amplitude and current frequency of the charging current and the discharging current each time the request information is generated, and record the self-heating conditions of different current amplitudes and current frequencies. Then, the appropriate range of the current amplitude and current frequency is determined according to the recorded self-heating conditions, and the corresponding relationship between the charging current and the discharging current and the self-heating current is established, and the corresponding relationship can be a table or a formula.

It can be understood that by recording the above information, it can assist the electrical device to quickly and accurately generate request information, so that the electrical device can be quickly heated to a temperature suitable for charging, thereby increasing the charging speed.

In the above embodiment, when the battery temperature is greater than or equal to the preset temperature threshold, the request information is generated according to the maximum charging current of the battery; when the battery temperature is less than the preset temperature threshold, the current amplitude and frequency of the self-heating current are determined according to the battery temperature; and the current amplitude and frequency of the self-heating current are determined according to the current amplitude and frequency of the self-heating current. The embodiment of the present application generates different request information in different scenarios, which can meet the charging and self-heating requirements of electrical devices. Among them, battery self-heating can quickly heat the battery from a low temperature to a suitable charging temperature, thereby improving the performance of the battery in a low temperature environment and extending the battery life.

It should be understood that, although the various steps in the above flow chart are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the above figure may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application also provides a power supply device for implementing the power supply method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more power supply device embodiments provided below can refer to the limitations on the power supply method above, and will not be repeated here.

According to some embodiments of the present application, as shown in FIG6 , a power supply device is provided, which is deployed in a power supply system, and includes:

The information receiving module 401 is used to receive the request information sent by the electric device;

A current determination module 402, configured to determine a charging current and a discharging current of the electrical device according to the request information;

The power supply module 403 is used to charge the electrical device according to the charging current and discharge the electrical device according to the discharging current.

In some embodiments, the current determination module 402 is specifically configured to determine the current amplitude of the charging current and the current amplitude and current frequency of the discharging current according to the current information carried in the request information.

In some embodiments, when the request information includes a charging request, the charging current and the discharging current satisfy a first constraint, and the first constraint includes that the charging power is greater than the discharging power; when the request information includes self-heating, the charging current and the discharging current satisfy a second constraint, and the second constraint includes that the charging power is less than or equal to the discharging power.

In some embodiments, the power supply system includes an AC-DC converter and a DC converter, and the power supply module 403 is specifically used to control the AC-DC converter to output charging current to the electrical equipment to charge the electrical equipment; control the DC converter to obtain the discharge current output by the electrical equipment to discharge the electrical equipment.

According to some embodiments of the present application, as shown in FIG7 , an electric device is provided, the device comprising:

The information generating module 501 is used to generate request information according to the battery status of the electric device;

The information sending module 502 is used to send request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and discharging current of the electrical device, charge the electrical device according to the charging current, and discharge the electrical device according to the discharging current.

In some embodiments, the battery status includes the battery temperature; the information generating module 501 is specifically configured to generate request information according to the maximum charging current of the battery when the battery temperature is greater than or equal to a preset temperature threshold.

In some embodiments, the information generation module 501 is also used to determine the current amplitude and frequency of the self-heating current according to the battery temperature when the battery temperature is less than a preset temperature threshold; and generate request information according to the current amplitude and current frequency of the self-heating current.

For the specific definitions of the power supply device and the power consumption device, please refer to the definitions of the power supply method above, which will not be repeated here. The various modules in the above-mentioned power supply device and the power consumption device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the electronic device in the form of hardware, or can be stored in the memory of the electronic device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

According to some embodiments of the present application, a power supply system is provided as shown in Figure 8. The power supply system 11 includes a connection interface 111 and a controller 112; when the power supply system 11 is connected to an electric device through the connection interface, the controller executes the method in the above embodiment.

In the embodiment of the present application, the power device 12 is connected to the power supply system 11 through the connection interface 111, and the controller 112 receives the request information sent by the power device 12 through the connection interface 111, and determines the charging current and discharging current of the power device 12 according to the request information; then, the controller 111 controls the power supply system 11 to charge the power device 12 according to the charging current; and discharges the power device 12 according to the discharging current. In the embodiment, during the charging process of the electrical equipment, the electrical equipment is used to discharge, and the discharge current can eliminate the lithium ion accumulation at the negative electrode of the lithium battery in time, thereby avoiding the lithium precipitation problem caused by continuous charging with large currents, and eliminating the weakened polarization phenomenon, and can also protect the rechargeable battery, increase the charging rate, and thus increase the charging speed.

According to some embodiments of the present application, as shown in Figure 9, the power supply system also includes an AC-DC converter 113, a DC converter 114 and an energy storage battery 115; a first end of the AC-DC converter 113 is connected to the power supply grid, and a second end of the AC-DC converter 113 is connected to the connection interface 111; a first end of the DC converter 114 is connected to the connection interface 111, and a second end of the DC converter 114 is connected to the energy storage battery 115; and a controller 112 is respectively connected to the AC-DC converter 113, the DC converter 114 and the energy storage battery 115.

In the embodiment of the present application, the AC-DC converter 114 can convert the AC current input from the power supply network into a DC current, and output the DC current to the power-consuming device 12. The DC converter 115 can be a bidirectional converter, that is, it can convert the DC current output from the power-consuming device 12, and input the converted DC current to the energy storage battery 115 for storage; it can also convert the DC current output from the energy storage battery 115, and input the converted DC current to the power-consuming device 12.

The controller 112 is respectively connected to the AC/DC converter 113, the DC converter 114 and the energy storage battery 115. After determining the charging current and the discharging current of the electric device according to the request information, the controller 112 controls the AC/DC converter 113 and the DC converter 114 to work, that is, controls the AC/DC converter 113 to output the charging current to the electric device 12 to charge the electric device 12; controls the DC converter 114 to obtain the discharging current output by the electric device 12 to discharge the electric device 12.

The embodiment of the present application timely eliminates the accumulation of lithium ions at the negative electrode of the lithium battery by superimposing the discharge current during the charging process of the electrical device, thereby avoiding the lithium precipitation problem caused by continuous charging with a large current, and eliminating the weakened polarization phenomenon, which can also protect the rechargeable battery, increase the charging rate, and thus increase the charging speed. In addition, the embodiment of the present application forms an oscillating current at the electrical device by superimposing the charging current and the discharge current, so that the electrical device is used for self-heating of the battery, so that the battery temperature is quickly raised to a temperature suitable for charging, and the charging speed is further increased.

According to some embodiments of the present application, an electric device is provided, and its internal structure diagram may be shown in FIG10. The electric device includes a processor, a memory, a communication interface, a display, and the like connected via a system bus. The present invention relates to a device for controlling a battery cell of an electric device and a display screen and an input device. The processor of the electric device is used to provide computing and control capabilities. The memory of the electric device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the electric device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for balancing a battery cell is implemented. The display screen of the electric device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electric device can be a touch layer covering the display screen, or a button, trackball or touchpad provided on the housing of the electric device, or an external keyboard, touchpad or mouse, etc.

Those skilled in the art will understand that the structure shown in FIG. 10 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electrical equipment to which the scheme of the present application is applied. The specific electrical equipment may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

According to some embodiments of the present application, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, and the above instructions can be executed by a processor of an electronic device to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

According to some embodiments of the present application, a computer program product is also provided, and when the computer program is executed by a processor, the above method can be implemented. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, part or all of the above method can be implemented in whole or in part according to the process or function described in the embodiment of the present disclosure.

A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the embodiments of the present disclosure may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical storage, etc. Volatile memory may include random access memory. (Random Access Memory, RAM) or external cache memory. By way of illustration and not limitation, RAM can be in many forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solutions of the present application in detail, but cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the protection scope of the attached claims described in the present application. Therefore, the protection scope of the patent of this application shall be based on the contents of the attached claims, and the description and drawings can be used to explain the contents of the claims.

Claims (14)

1. A power supply method, characterized in that it is applied to a power supply system, the method comprising:

   Receiving request information sent by the electric device;

   Determine the charging current and discharging current of the electrical device according to the request information;

   The electric device is charged according to the charging current, and the electric device is discharged according to the discharging current.
2. The method according to claim 1, characterized in that the step of determining the charging current and the discharging current of the electrical device according to the request information comprises:

   According to the current information carried in the request information, the current amplitude of the charging current and the current amplitude and current frequency of the discharging current are determined.
3. The method according to claim 1 or 2, characterized in that, when the request information includes a charging request, the charging current and the discharging current satisfy a first constraint condition, and the first constraint condition includes that the charging power is greater than the discharging power;

   In a case where the request information includes self-heating, the charging current and the discharging current satisfy a second constraint condition, and the second constraint condition includes that the charging power is less than or equal to the discharging power.
4. The method according to any one of claims 1 to 3, characterized in that the power supply system includes an AC-DC converter and a DC converter, and charging the power-consuming device according to the charging current and discharging the power-consuming device according to the discharging current comprises:

   Controlling the AC/DC converter to output the charging current to the electrical device to charge the electrical device;

   The DC converter is controlled to obtain the discharge current output by the electrical device, so that the electrical device discharges.
5. A power supply method, characterized in that it is applied to power-consuming equipment, the method comprising:

   Generate request information according to the battery status of the power-consuming device;

   Sending request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and the discharging current of the power-consuming device, charge the power-consuming device according to the charging current, and discharge the power-consuming device according to the discharging current.
6. The method according to claim 5, characterized in that the battery status includes a battery temperature; and the generating the request information according to the battery status of the power-consuming device comprises:

   When the battery temperature is greater than or equal to a preset temperature threshold, the request information is generated according to the maximum charging current of the battery.
7. The method according to claim 6, characterized in that the method further comprises:

   When the battery temperature is less than the preset temperature threshold, determining the current amplitude and frequency of the self-heating current according to the battery temperature;

   The request information is generated according to the current amplitude and current frequency of the self-heating current.
8. A power supply device, characterized in that it is deployed in a power supply system, and the device comprises:

   An information receiving module, used for receiving request information sent by the electric device;

   A current determination module, used to determine the charging current and the discharging current of the electrical device according to the request information;

   A power supply module is used to charge the power-consuming device according to the charging current and discharge the power-consuming device according to the discharging current.
9. An electrical device, characterized in that the device comprises:

   An information generation module, used to generate request information according to the battery status of the power-consuming device;

   An information sending module is used to send request information to the power supply system, wherein the request information is used to instruct the power supply system to determine the charging current and discharging current of the power device, charge the power device according to the charging current, and discharge the power device according to the discharging current.
10. A power supply system, characterized in that the power supply system comprises a connection interface and a controller;

    When the power supply system is connected to the power-consuming device through the connection interface, the controller executes the method according to any one of claims 1 to 4.
11. The power supply system according to claim 10, characterized in that the power supply system further comprises an AC-DC converter, a DC converter and an energy storage battery;

    The first end of the AC/DC converter is connected to the power supply network, and the second end of the AC/DC converter is connected to the connection interface;

    The first end of the DC converter is connected to the connection interface, and the second end of the DC converter is connected to the energy storage battery;

    The controller is respectively connected to the AC/DC converter, the DC converter and the energy storage battery. catch.
12. An electrical device comprises a rechargeable battery, a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the method described in any one of claims 5 to 7 when executing the computer program.
13. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method according to any one of claims 1 to 7.
14. A computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.