WO2023279866A1

WO2023279866A1 - Battery charging methods and apparatus, charging device, and computer-readable storage medium

Info

Publication number: WO2023279866A1
Application number: PCT/CN2022/094321
Authority: WO
Inventors: 谢红斌
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-07-09
Filing date: 2022-05-23
Publication date: 2023-01-12
Also published as: CN115603396A

Abstract

The present application discloses battery charging methods and apparatus, a charging device, and a computer-readable storage medium. A method comprises: determining a charging mode, the charging mode being a first charging mode or a second charging mode, and the charging power or charging duration of the first charging mode and the second charging mode being different; and controlling the charging current of a battery on the basis of a negative potential and the charging mode of the battery of an electronic device, so as to charge the battery. Using the present method can ensure the charging rate of an electronic device and can also slow down battery aging of the electronic device.

Description

Battery charging method, device, charging device, and computer-readable storage medium

related application

This application claims the priority of the Chinese patent application filed on July 9, 2021, with application number 202110780695X, entitled "Battery Charging Method, Device, Charging Equipment, and Computer-Readable Storage Medium", which is hereby incorporated in its entirety as refer to.

technical field

The present application relates to the technical field of battery management, and more specifically, relates to a battery charging method, device, charging device and computer-readable storage medium.

Background technique

With the widespread use of electronic devices, the requirements for the functions of the electronic devices are getting higher and higher, especially the requirements for the batteries of the electronic devices are also constantly increasing.

Charging is one of the key technologies in the application of batteries. There are various charging methods. For example, when charging lithium batteries, constant current (CC) charging and constant voltage (Constant voltage, CV) are commonly used. ) The charging method of these two stages of charging, that is, first use a constant current to charge the lithium battery with a constant current until the voltage of the lithium battery cell reaches the cell charging limit voltage, and then use the cell charging limit voltage to The lithium battery is charged at a constant voltage, at this time, the charging current gradually decreases. When the charging current decreases to the charging cut-off current, the charging ends, and the battery cell of the lithium battery reaches a fully charged state. In the existing charging method, during the charging process, the aging of the battery is prone to be accelerated, thereby affecting the service life of the battery.

Contents of the invention

In view of this, the present application discloses a battery charging method, device, charging equipment and computer-readable storage medium, which can not only ensure the charging rate of the electronic equipment, but also slow down the battery aging of the electronic equipment.

A battery charging method applied to electronic equipment, comprising:

Determine the charging mode; the charging mode is the first charging mode or the second charging mode, and the charging power or charging time of the first charging mode and the second charging mode are different;

Based on the negative electrode potential of the battery of the electronic device and the charging mode, a charging current of the battery is controlled to charge the battery.

A battery charging method applied to electronic equipment, comprising:

Detecting whether lithium precipitation occurs in the battery of the electronic device during the charging process, and obtaining the detection result of lithium precipitation;

Based on the lithium analysis detection result and the charging mode, the charging current of the battery is controlled to charge the battery.

A battery charging device, comprising:

A determining module, configured to determine a charging mode; the charging mode is a first charging mode or a second charging mode, and the charging power or charging duration of the first charging mode and the second charging mode are different;

A control module configured to control a charging current of the battery of the electronic device based on the negative electrode potential of the battery of the electronic device and the charging mode, so as to charge the battery.

A battery charging device, comprising:

A determining module, configured to determine a charging mode; the charging mode is a first charging mode or a second charging mode, and the charging power or charging time of the first charging mode is different from that of the second charging mode;

The detection module is used to detect whether the battery of the electronic device has a lithium precipitation phenomenon during the charging process, and obtain the detection result of the lithium analysis;

A control module, configured to control the charging current of the battery based on the lithium analysis detection result and the charging mode, so as to charge the battery.

A charging device, comprising a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the battery charging method as described in the first aspect or as described in The steps of the battery charging method described in the second aspect.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method according to the first aspect or the battery charging method according to the second aspect are realized.

It can be seen from the above technical solutions that the present application discloses a battery charging method, device, charging device and computer-readable storage medium. By determining the charging mode of the electronic device, it can be based on the negative potential of the battery of the electronic device and the determined charging mode. , to control the charging current of the battery to charge the battery of the electronic device. Since the charging power or charging time of the first charging mode and the second charging mode in the charging mode are different, it can be quickly charged or charged according to the user's usage scenario. When the time used is short, the charging current of the battery is controlled based on the negative electrode potential of the battery of the electronic device to charge at the fastest charging speed. When the user does not need fast charging or the charging time is long, it is timely reduced. The charging current of the battery, by reducing the charging current of the battery to slow down the aging of the battery and prolong the service life of the battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those of ordinary skill in the art can also obtain other drawings according to the disclosed drawings on the premise of not paying creative efforts.

Fig. 1 is an application environment diagram of a battery charging method in an embodiment;

Fig. 2 is a schematic flow chart of a battery charging method in an embodiment;

3 is a schematic flow chart of a battery charging method in another embodiment;

4 is a schematic flow chart of a battery charging method in another embodiment;

5 is a schematic diagram of the charging speed and charging power of the electronic device in the first charging mode in one embodiment;

6 is a schematic diagram of the charging speed and charging power of the electronic device in the second charging mode in one embodiment;

Fig. 7 is a structural block diagram of a battery charging device in an embodiment;

Fig. 8 is a structural block diagram of a battery charging device in an embodiment;

Fig. 9 is an internal structure diagram of a charging device in an embodiment.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first client could be termed a second client, and, similarly, a second client could be termed a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.

At present, the energy supply in electronic equipment generally comes from the lithium-ion battery inside the electronic equipment. As the requirements for the functions of electronic equipment are getting higher and higher, the requirements for batteries in electronic equipment are also constantly improving. For example, the capacity value requirements for smartphone batteries have now been raised to close to 5000mAh or even higher, and the cycle life of the battery has also increased from 500 cycles to 800 cycles, and the cycle life retention rate of batteries with a capacity greater than 1000 cycles is still It should be greater than 80%. However, limited by the energy density of current lithium-ion batteries (generally between 600Wh and 800Wh), the maximum capacity of the battery can only reach about 5000mAh at present, so the requirements for the charging speed of the battery are also constantly increasing. The previous 3h full charge has been shortened to 90min full, and even close to 30min full.

How to charge lithium batteries is one of the key technologies in the application of lithium batteries. In the prior art, when charging lithium batteries, constant current (CC) charging and constant voltage (Constant voltage, CV) are generally used. The charging method of these two stages of charging is to use a constant current to charge the lithium battery with a constant current until the voltage of the battery cell of the lithium battery reaches the cell charging limit voltage, and then use the cell charging limit voltage to charge the lithium battery. The battery is charged at a constant voltage, at this time, the charging current gradually decreases. When the charging current decreases to the charging cut-off current, the charging ends, and the battery cell of the lithium battery reaches a fully charged state.

However, in the current fast charging process, the charging speed is generally fixed, that is, as long as the charging environment (adapter, fast charging protocol) matches the corresponding fast charging conditions, it will automatically perform fast charging at the fastest speed. Therefore, if the user uses fast charging for the entire life cycle of the electronic device, it will increase the time that the battery is at high voltage, and the time that the battery is at high temperature will also increase, so that the time period of accelerated battery aging will also increase.

In addition, since the battery of an electronic device will continue to age, if the battery is still charged in the initial charging process after aging, it will exceed the maximum current that the aging battery can actually charge. For example, if the capacity of a battery is 4000mAh and the initial maximum charging rate is 3C, the maximum charging current is 12A. However, when the battery ages to a capacity of 3500mAh, the maximum charging current is only 3*3500=10.5A. When continuing to charge at 12A, it will exceed its maximum acceptable range, which will accelerate the decay speed of the battery and affect the service life of the battery.

Furthermore, during the charging process of the battery, Li ions (Li+) are continuously intercalated from the positive electrode of the battery to the negative electrode of the battery. Once the intercalation speed of lithium ions on the surface of the negative electrode of the battery exceeds the capacity of the negative electrode of the battery, lithium ions will remain on the surface of the negative electrode of the battery. Because the potential on the surface of the negative electrode of the battery continues to decrease, as long as the potential on the surface of the negative electrode of the battery reaches 0V, that is, the potential generated by lithium metal, a single substance of lithium metal will be generated, that is, the phenomenon of lithium precipitation will occur. The phenomenon of lithium precipitation generally occurs during fast charging, low temperature charging and aging batteries. The fast charging process is because the insertion speed of lithium ions is lower than the rated rate. The low temperature is because the ion diffusion activity is reduced at low temperature, and the speed of intercalation inside the material is also reduced. The aging is due to the secondary reactions such as SEI in the battery. The SEI film formed on the surface of the material increases the internal resistance of the material surface. The potential of the negative electrode of the battery can be expressed as Φ(anode)=Φ(e)+ΔΦ(ΔΦ<0), where ΔΦ includes the potential generated by the internal resistance, so the increase in the internal resistance will make the potential of the negative electrode surface reach 0V more easily, thus It is easier to analyze lithium, Φ(anode) represents the potential of the negative electrode of the battery, and Φ(e) represents the potential of the surface of the negative electrode of the battery. The lithium precipitation will lead to the reduction of lithium ions and reduce the battery capacity. At the same time, because the lithium precipitation will be directional, the precipitated lithium dendrites will pierce the separator, resulting in the risk of overheating or even a short circuit between the positive and negative electrodes.

Therefore, it is urgent to provide a charging method that can not only ensure the charging rate but also slow down the aging of the battery in view of the problems existing in the existing charging method.

FIG. 1 is a schematic diagram of an application environment of a battery charging method in an embodiment. As shown in FIG. 1 , the application environment includes an electronic device 102 and a charging device 104 , the electronic device 102 communicates with the charging device 104 through a network, and the charging device 104 can charge the electronic device 102 . Wherein, the electronic device 102 can be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers and portable wearable devices, and the charging device 104 can be various types of chargers, or a mobile power supply, or It can be various electronic devices such as notebook computers and tablet computers. It can be understood that if the charging device 104 is an electronic device, for example, when the charging device 104 is a notebook computer and the electronic device 102 is a smart phone, the notebook computer can be used as a smart phone. For mobile phone charging, for another example, when the charging device 104 is a laptop computer and the electronic device 102 is a smart watch, the smart watch can be charged through the laptop computer.

Figure 2 is a flowchart of a battery charging method in one embodiment. The battery charging method in this embodiment is described by taking the charging device running on the charging device in FIG. 1 as an example. As shown in Figure 2, the battery charging method described above includes the following steps:

S201. Determine the charging mode; the charging mode is the first charging mode or the second charging mode, and the charging power or charging time of the first charging mode and the second charging mode are different.

In this embodiment, the charging device may determine the charging mode according to the usage scenario of the user, or may also determine the charging mode according to the user's selection operation. Optionally, the usage scenario of the user may be a usage scenario in which fast charging of the electronic device is required, or may be a usage scenario mainly in which the service life of the electronic device is improved. Exemplarily, the use scenarios that require fast charging of electronic devices can be: before leaving home/hotel for work, on the way to work/travel, outdoor activities, traveling in public places, before returning home from get off work, on the way to work, etc.; The usage scenarios based on the service life of the battery can be: during office work, holiday travel on the plane/high-speed rail, long-distance self-driving, charging and using at home/hotel, before going to bed at home/hotel, etc. In this embodiment, optionally, the charging device may use image recognition, electronic device location, current time, etc. to determine the user's usage scene. The user usage scenario where the electronic device is located may be determined according to the geographic location where the electronic device is located, or the user usage scenario where the electronic device is located may also be determined according to the current time. Optionally, the image of the environment where the electronic device is located may be collected by the charging device itself, or may be collected by the electronic device and sent to the charging device. Optionally, the geographic location of the electronic device may be positioned by the charging device itself, or may be sent to the charging device after the electronic device is positioned. Optionally, as another implementable manner, the user usage scenario where the electronic device is located may also be determined by the electronic device, and then the electronic device sends the determined result to the charging device. Optionally, the electronic device may be a smart phone, various personal computers, notebook computers, tablet computers, portable wearable devices, and the like. Exemplarily, in this embodiment, the charging power of the first charging mode may be 12W, and the charging time may be 1h; the charging power of the second charging mode may be 10W, and the charging time may be 1.5h. Optionally, if the user's usage scenario is a usage scenario that requires fast charging of the electronic device, the charging device may determine that the charging mode is the first charging mode. For example, the user needs to fast charge the electronic device before leaving home for work. In this scenario, the charging device may determine that the charging mode of the electronic device is the first charging mode. Optionally, if the user's usage scenario is mainly to improve the service life of the electronic device, the charging device can determine that the charging mode is the second charging mode. To charge the electronic device, at this time, the charging device may determine that the charging mode of the electronic device is the second charging mode.

It should be noted that both the first charging mode and the second charging mode in the embodiment of the present application are fast charging modes, and the charging power of the first charging mode is greater than that of the second charging mode. Therefore, the charging of the first charging mode rate is greater than the charging rate of the second charging mode, then the charging time of the first charging mode is shorter than the charging time of the second charging mode, but the charging time of the first charging mode and the charging time of the second charging mode both satisfy fast charging needs. For example, the charging power of the first fast charging mode is 12W, the charging power of the second fast charging mode is 10W, and finally the charging time of the first charging mode is 30 minutes, and the charging time of the second charging mode is 34 minutes.

S202. Control the charging current of the battery based on the negative electrode potential and the charging mode of the battery of the electronic device, so as to charge the battery.

In this embodiment, the charging device controls the charging current of the battery of the electronic device based on the potential of the negative electrode of the battery of the electronic device and the determined charging mode, so as to charge the battery of the electronic device. What needs to be explained here is that the higher the potential of the negative electrode of the battery of the electronic device, the smaller the charging current of the battery, and the smaller the loss of the battery. The loss is large. For example, in order to meet the requirements of fast charging and ensure the life of the battery, the potential of the negative electrode in each charging mode can be controlled within a certain reasonable range, and the potential of the negative electrode of the battery can be detected during the charging process. If the potential of the negative electrode If it exceeds the range of the potential of the negative electrode, the charging current can be properly adjusted so that the potential of the negative electrode of the battery is within the corresponding range of the potential of the negative electrode. For example, for the first charging mode, mainly to ensure the charging rate, the negative electrode potential of the battery can be set in a lower potential range, for example, if the negative electrode potential of the battery is set to be less than 0V, then during the battery charging process, the charging power can be appropriately increased To ensure the charging rate; for the second charging mode, mainly to ensure battery life, you can set the negative electrode potential of the battery to be in a higher potential range. Small charging power to ensure battery life. In the embodiment of the present application, it is not limited thereto.

In the above battery charging method, by determining the charging mode of the electronic device, it is possible to control the charging current of the battery to charge the battery of the electronic device based on the negative electrode potential of the battery of the electronic device and the determined charging mode, because the first charging in the charging mode mode is different from the charging power or charging time of the second charging mode, so that the charging current of the battery can be controlled based on the negative electrode potential of the battery of the electronic device when the user needs fast charging or the charging time is short according to the user's usage scenario Charging at the fastest charging speed. When the user does not need fast charging or charging takes a long time, the charging current of the battery is reduced in a timely manner. By reducing the charging current of the battery, the aging of the battery is slowed down and the service life of the battery is extended. .

In scenes that require fast charging, such as before leaving home/hotel for work, on the way to work/travel, outdoor activities, traveling in public places, before returning home from get off work, on the way to work, etc., in order to ensure the charging rate, the charging mode can be the first charging mode. In one embodiment, the above S202 includes: if the charging mode is the first charging mode, adjusting the charging current of the battery according to the preset first negative electrode potential range and the negative electrode potential.

In this embodiment, if the charging mode of the electronic device is the first charging mode, the charging device adjusts the charging current of the battery to charge the battery of the electronic device according to the preset first negative potential range and the negative potential of the battery of the electronic device. Charge. For example, if the negative electrode potential of the battery is greater than the maximum value of the first negative electrode potential range, the charging current of the battery can be appropriately increased; if the negative electrode potential of the battery is lower than the minimum value of the first negative electrode potential range, the charging current of the battery can be appropriately adjusted current. Wherein, when adjusting the charging current of the battery, the current can be increased or decreased in a certain step, or the current can be adjusted in a manner of 1.1 times, 1.2 times, etc., which is not limited in this embodiment of the application.

Optionally, the potential range of the first negative electrode is φ0≤φ≤0V, where φ is the potential of the negative electrode of the battery, and φ0 is determined according to the life requirements of the battery in the entire life cycle of the electronic device, for example, the battery life of the electronic device in the entire life cycle The service life requirement may be that the battery capacity retention rate of the electronic device after 800 cycles is ≥ 80%, then φ0 may be determined according to this requirement. Optionally, φ0≤0V, for example, φ0 may be -5mA, -10mA, etc., which are not limited in this embodiment of the present application.

Optionally, the charging device can control the charging current of the battery of the electronic device by the following method: if the charging mode is the first charging mode, then adjust the charging current of the battery according to the preset first negative potential range and negative potential.

In this embodiment, if the negative electrode potential of the battery of the electronic device is within the above-mentioned first negative electrode potential range, it means that the current charging power meets the charging demand of the first charging mode, and there is no need to adjust the charging power, and the current charging power can be maintained. The charging power charges the battery. If the negative electrode potential of the battery of the electronic device is outside the above-mentioned first negative electrode potential range, the charging device determines the difference between the negative electrode potential of the battery of the electronic device and the preset boundary value of the first negative electrode potential range, according to the The difference adjusts the charging current of the battery of the electronic device. In this embodiment, when the negative electrode potential of the battery is outside the range of the above-mentioned first negative electrode potential, it means that the current charging power does not meet the charging requirements of the first charging mode. The charging power is adjusted. The following describes two cases where the negative electrode potential of the battery is greater than the maximum value in the first negative electrode potential range and the negative electrode potential of the battery is smaller than the minimum value in the first negative electrode potential range.

The first situation: in the scene where the negative electrode potential of the battery of the above-mentioned electronic device is outside the preset first negative electrode potential range, the negative electrode potential of the battery may be greater than the maximum boundary value of the first negative electrode potential range. In this scenario, The charging device increases the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range.

In this embodiment, when the negative electrode potential of the battery is greater than the maximum boundary value of the preset first negative electrode potential range, the charging device may increase the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range. Optionally, the charging device may increase the charging current of the battery of the electronic device in a stepping current manner. For example, take the preset first negative electrode potential range of φ0≤φ≤0V as an example, where φ is the battery Negative electrode potential, if the negative electrode potential of the battery of the electronic device is greater than 0V, the charging device will query the step current corresponding to the difference or the step corresponding to the difference range to which the difference belongs according to the difference between the negative electrode potential of the battery and OV current with which the stepping current is used to increase the charging current of the battery of the electronic device. In this embodiment, since the smaller the charging current of the battery is, the greater the potential of the negative electrode of the battery is. When the potential of the negative electrode is greater than the maximum boundary value of the first negative electrode potential range, it means that the charging current of the battery is small and cannot meet the first charging requirement. mode, the charging device increases the charging current of the battery of the electronic device according to the determined step current, uses the increased charging current to charge the battery, and charges the electronic device according to the increased charging current. Obtain the current negative electrode potential of the battery of the electronic device during the battery charging process, judge the current negative electrode potential of the battery, and determine whether the current negative electrode potential of the battery is within the above-mentioned first negative electrode potential range, if the current negative electrode potential of the battery is not within the above-mentioned first negative electrode potential range If the negative electrode potential is within a negative electrode potential range, continue to gradually increase the charging current of the battery according to the first step current until the current negative electrode potential of the battery is within the above-mentioned first negative electrode potential range. Exemplarily, after the charging current of the battery is increased, if the acquired current negative electrode potential is 0V, the charging device may continue to charge the battery of the electronic device with the corresponding charging current when the current negative electrode potential is 0V.

In this embodiment, if the negative electrode potential of the battery of the electronic device is greater than the maximum boundary value of the first negative electrode potential range, the charging device increases the charging current of the battery of the electronic device until the current negative electrode potential of the battery is within the first negative electrode potential range , to ensure that the charging rate of the battery can be satisfied in the first charging mode. Moreover, by increasing the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range, the increased charging current can be flexibly controlled, the charging current can be adjusted quickly and accurately, and the charging rate can be further improved.

In the second case, in the scenario where the negative electrode potential of the battery of the electronic device is outside the preset first negative electrode potential range, the negative electrode potential of the battery may be smaller than the minimum boundary value of the first negative electrode potential range. In this scenario, The charging device reduces the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range.

In this embodiment, when the negative electrode potential of the battery is lower than the preset minimum boundary value of the first negative electrode potential range, the charging device may reduce the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range. Optionally, the charging device may reduce the charging current of the battery of the electronic device by using a step current method. For example, take the preset first negative electrode potential range of φ0≤φ≤0V as an example, where φ is the battery Negative electrode potential, if the negative electrode potential of the battery of the electronic device is less than φ0, the charging device determines the step current that reduces the charging current of the battery of the electronic device according to the difference between the negative electrode potential of the battery and φ0, and uses this step current to reduce The charging current of the battery of an electronic device. In this example, when the charging current of the battery is too high, the lithium ion intercalation speed of the battery may be lower than the rated rate, resulting in lithium precipitation. If the potential of the negative electrode of the battery of the electronic device is less than the minimum boundary value of the preset first negative electrode potential range, the phenomenon of lithium precipitation may have occurred. The potential is within the first negative potential range. In this embodiment, when the negative electrode potential of the electronic device is lower than the minimum boundary value of the first negative electrode potential range, the charging device reduces the charging current of the battery of the electronic device, uses the reduced charging current to charge the battery, and Obtain the current negative electrode potential of the battery of the electronic device during the process of the charging device charging the battery of the electronic device according to the reduced charging current, judge the current negative electrode potential of the battery, and determine whether the current negative electrode potential of the battery is located at the above-mentioned first negative electrode Within the potential range, if the current negative electrode potential of the battery is not within the above-mentioned first negative electrode potential range, continue to reduce the charging current of the battery until the current negative electrode potential of the battery is within the above-mentioned first negative electrode potential range. Exemplarily, after the charging current of the battery is reduced, if the acquired current negative electrode potential is 0V, the charging device may continuously charge the battery of the electronic device with the corresponding charging current when the current negative electrode potential is 0V.

In this embodiment, when the potential of the negative electrode of the battery is less than the minimum boundary value of the potential range of the first negative electrode, the phenomenon of lithium precipitation may occur, then in order to suppress the phenomenon of lithium precipitation, the charging device can reduce the charging current of the battery of the electronic device until The current potential of the negative electrode of the battery is within the potential range of the first negative electrode. Under the condition of ensuring a certain charging rate, the phenomenon of lithium precipitation can be properly suppressed and the service life of the battery can be prolonged. and,

The charging current of the battery is reduced so that the potential of the negative electrode of the battery is within the range of the first negative electrode potential, the reduced charging current can be flexibly controlled, the charging current can be adjusted quickly and accurately, and the charging rate is further increased.

In this embodiment, if the charging device determines that the target charging mode of the electronic device is the first charging mode, the charging device can adjust the charging of the battery of the electronic device according to the preset first negative potential range and the negative potential of the battery of the electronic device. In this way, the charging device can accurately adjust the charging current of the battery of the electronic device according to the preset first negative electrode potential range and the negative electrode potential of the electronic device, so as to ensure the charging efficiency of the battery of the electronic device.

During office work, holiday trips on airplanes/high-speed rail, long-distance self-driving, charging and using at home/hotels, and before going to bed at home/hotels, etc., the charging mode of electronic devices is the second fast charging mode. . In one embodiment, the above S202 includes: if the charging mode is the second charging mode, adjusting the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential.

In this embodiment, if the charging mode of the electronic device is the second charging mode, the charging device adjusts the charging current of the battery according to the preset second negative potential range and the negative potential of the battery of the electronic device. For example, when the negative electrode potential of the battery exceeds the second negative electrode potential range, the charging current of the battery can be properly adjusted to meet the charging requirement of the second fast charging mode. Wherein, when adjusting the charging current of the battery, the current may be reduced in a certain step, or the current may be adjusted at a double speed such as 1.1 times, 1.2 times, etc., which is not limited in the embodiment of the present application.

Optionally, the potential range of the second negative electrode is φ≥0V, where φ is the potential of the negative electrode of the battery. Optionally, the negative electrode potential of the battery of the electronic device may be within the second negative electrode potential range, or outside the second negative electrode potential range. Optionally, the charging device can adjust the charging current of the electronic device by the following method: if the negative electrode potential of the battery of the electronic device is outside the above-mentioned second negative electrode potential range, determine the difference between the negative electrode potential and the boundary value of the second negative electrode potential range The difference between them, and adjust the charging current of the battery of the electronic device according to the difference.

Further, in the scenario where the negative electrode potential of the battery of the electronic device is outside the preset second negative electrode potential range, there may be a situation that the negative electrode potential of the battery is smaller than the minimum boundary value of the second negative electrode potential range. In one embodiment, if the negative electrode potential is less than the minimum boundary value of the second negative electrode potential range, the charging current of the battery is reduced so that the negative electrode potential of the battery is within the second negative electrode potential range.

In this embodiment, if the negative electrode potential of the battery is less than the minimum boundary value of the second negative electrode potential range, the charging device may calculate the difference between the negative electrode potential of the battery and the minimum boundary value of the second negative electrode potential range, and determine The step current of the charging current of the battery of the charging device is reduced, and the charging current of the battery of the charging device is reduced by using the determined step current. Exemplarily, taking the preset second negative electrode potential range of φ≥0V as an example, where φ is the negative electrode potential of the battery, if the negative electrode potential of the battery of the electronic device is less than the minimum boundary value 0V of the second negative electrode potential range, charging According to the difference between the negative potential of the battery and 0V, the device determines the step current to reduce the charging current of the battery of the charging device, and uses the step current to reduce the charging current of the battery. In this embodiment, since the greater the charging current of the battery is, the lower the potential of the negative electrode of the battery is. If the potential of the negative electrode is less than the minimum boundary value of the second negative electrode potential range, it means that the charging current of the battery is too large, and appropriate charging current is required. Reduce the charging current of the battery. Optionally, the charging device acquires the current negative electrode potential of the battery of the electronic device during the process of charging the battery of the electronic device with the reduced charging current, judges the current negative electrode potential of the battery, and determines whether the current negative electrode potential of the battery is at Within the above-mentioned second negative electrode potential range, if the current negative electrode potential of the battery is not within the above-mentioned second negative electrode potential range, continue to gradually reduce the charging current of the battery according to the third step current until the current negative electrode potential of the battery is within the above-mentioned second negative electrode potential range. within the negative electrode potential range, and continue to use the charging current corresponding to the current negative electrode potential within the second negative electrode potential range to continuously charge the battery of the electronic device. Exemplarily, if the current negative electrode potential obtained after reducing the charging current of the battery is 1V, which is within the range of φ≥0V, the charging device can use the charging current corresponding to the current negative electrode potential of 1V to charge the battery of the electronic device.

In this embodiment, if the negative electrode potential of the battery of the electronic device is less than the minimum boundary value of the second negative electrode potential range, the charging device can determine the reduction value according to the difference between the negative electrode potential and the minimum boundary value of the second negative electrode potential range. The step current of the charging current of the battery of the small electronic device, and then gradually reduce the charging current of the battery of the electronic device according to the determined step current until the current negative electrode potential of the battery is within the second negative electrode potential range, because the negative electrode of the battery If the potential is less than the minimum boundary value of the second negative electrode potential range, it means that the charging current of the battery is too large and cannot meet the requirements of prolonging the battery life required by the second charging mode. to extend battery life. Moreover, the corresponding step current is determined according to the difference between the negative electrode potential and the minimum boundary value of the second negative electrode potential range, and different differences can correspond to different step currents, and the step current can be flexibly controlled according to the difference, The charging current can be adjusted quickly and accurately to further increase the charging rate.

In this embodiment, if the charging device determines that the charging mode of the electronic device is the second charging mode, the charging device can dynamically adjust the charging current of the battery of the electronic device according to the preset second negative potential range and the negative potential of the battery of the electronic device To determine the target charging current of the electronic device in the second charging mode, since the determined target charging current is obtained by dynamically adjusting the charging current of the battery of the electronic device according to the preset second negative electrode potential range and the negative electrode potential of the electronic device , the adjusted target charging current not only meets the needs of fast charging, but also adjusts the charging current by controlling the negative electrode potential of the battery within a certain range, which can reduce the loss of the battery caused by excessive charging current and prolong the service life of the battery.

When the charging mode of the electronic device is the second charging mode, in addition to considering prolonging the service life of the battery, it is also necessary to consider the charging rate requirement of the electronic device. In one embodiment, the above-mentioned adjustment of the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential includes: adjusting the charging current of the battery according to the second negative electrode potential range, the negative electrode potential and the charging speed requirement of the electronic device .

The charging speed requirement of the electronic device may include the charging time of the battery, for example, the charging time of the battery is 30 min, 35 min, 38 min, etc., which is not limited in this embodiment of the application.

In this embodiment, the charging device adjusts the charging current of the battery of the electronic device according to the preset second negative electrode potential range, the negative electrode potential of the battery of the electronic device, and the charging speed requirement of the electronic device. That is to say, by adjusting the charging current of the battery so that the negative electrode battery of the battery is in the second negative electrode potential range, the charging current should meet the charging speed requirements of the electronic device, so it can be satisfied that the negative electrode battery of the battery is located in the second negative electrode potential range. Among multiple charging currents in the potential range, a larger charging current is selected to charge the battery of the electronic device to meet the charging speed requirement.

For example, the battery of an electronic device is a 3C battery, and the original charging time required for the 3C battery is 30 minutes. First, the charging device needs to complete charging the battery of the electronic device within a charging time of ≤30 minutes. Range, the negative electrode potential of the battery of the electronic device and the requirement to complete the charging of the battery of the electronic device within a charging time of ≤30min, and dynamically adjust the charging current of the battery of the electronic device to determine the target charging current of the electronic device.

In this embodiment, since the charging device adjusts the charging current of the battery of the electronic device according to the preset second negative electrode potential range, the negative electrode potential of the battery of the electronic device, and the charging speed requirement of the electronic device, when adjusting the charging current of the battery of the electronic device In the process of charging the charging current, the demand for the charging speed of the electronic device is also taken into consideration, which can increase the charging rate as much as possible while prolonging the service life of the battery.

In the scenario where the charging current of the battery is controlled based on the negative electrode potential of the battery of the electronic device to meet the target charging mode, the charging device needs to obtain the negative electrode potential of the battery of the electronic device first. In one embodiment, the method for obtaining the negative electrode potential of the battery includes: determining the negative electrode potential according to the negative electrode voltage of the battery and the voltage of the reference electrode built in the battery; or, obtaining the negative electrode potential according to a preset lithium-ion battery model.

In this embodiment, the charging device can directly detect the negative electrode voltage of the battery and the voltage of the built-in reference electrode of the battery as the negative electrode potential of the battery; also in the way of experimental calibration, by establishing a lithium-ion battery model, and through the lithium-ion battery The model performs calculations to obtain the negative potential of the battery. Optionally, the built-in reference electrode of the battery can be a lithium-coated copper wire.

Optionally, the potential of the negative electrode of the battery can be expressed as Φ(anode)=Φ(e)+ΔΦ(ΔΦ<0), wherein Φ(e) represents the potential of the surface of the negative electrode of the battery, and Φ(anode) represents the potential of the negative electrode of the battery, ΔΦ includes the potential generated by the internal resistance. The internal resistance is the internal resistance generated by the SEI film formed on the surface of the battery material by secondary reactions such as SEI in the battery. The negative electrode potential of the battery can be calculated according to the above formula.

In this embodiment, the charging device determines the negative electrode potential of the battery according to the negative electrode voltage of the battery of the electronic device and the voltage of the reference electrode built in the battery, or obtains the negative electrode potential of the battery of the electronic device according to a preset lithium-ion battery model, which The operation process and calculation method are relatively simple and easy to implement. Moreover, multiple ways of obtaining the negative electrode potential of the battery are simultaneously provided, which can be flexibly selected according to actual scenarios.

In the scene of charging the battery of an electronic device, the phenomenon of lithium deposition of the battery is prone to occur during the fast charging process of the battery, low temperature and aging batteries, and the lithium deposition will lead to the reduction of lithium ions in the battery and reduce the battery capacity, resulting in Battery life is shortened. Therefore, it is necessary to suppress the lithium precipitation phenomenon of the battery. In one embodiment, as shown in Figure 3, the above method also includes:

S301. During the process of charging the battery, detect whether the battery has a lithium-deposition phenomenon, and obtain a lithium-deposition detection result.

Among them, the principle of lithium analysis is to generate a layer of lithium metal on the surface of the negative electrode. During the charging process, Li+ is continuously intercalated from the positive electrode to the negative electrode. Once the insertion speed of lithium ions on the surface of the negative electrode exceeds the capacity of the negative electrode, there will be lithium ions remaining in the negative electrode. On the surface of the negative electrode, because the potential on the surface of the negative electrode continues to decrease, the potential of the negative electrode of the battery reaches 0V, that is, the potential generated by lithium metal, and a single substance of lithium metal will be generated. Lithium analysis will lead to the reduction of lithium ions in the battery and reduce the battery capacity. Optionally, the obtained detection result of lithium precipitation may be a phenomenon of lithium precipitation, or a phenomenon of no lithium precipitation.

In this embodiment, during the process of charging the battery, the charging device detects whether lithium deposition occurs in the battery of the electronic device. Optionally, the charging device can detect whether lithium deposition occurs in the battery of the electronic device through the following two methods, and the two methods for detecting whether lithium deposition occurs in the battery of the electronic device will be described in detail below:

Method A: Obtain the first charging amount of the battery at the unit voltage at the current moment and the second charging amount at the unit voltage at the previous historical moment; if the second charging amount is less than the first charging amount, and the second charging amount If the difference with the first charge amount is greater than the first threshold, it is determined that lithium precipitation occurs in the battery.

It should be noted that in this embodiment, the second charging amount of the battery at the unit voltage at the previous historical moment may be the second charging amount at the unit voltage at the historical moment adjacent to the current moment, or it may be a predetermined It is assumed that the second charging amount under the unit voltage at any historical moment in the time period, for example, may be the second charging amount under the unit voltage 2 minutes before the current moment.

In this embodiment, the charging device can compare the first charging amount under the unit voltage at the current moment with the second charging amount under the unit voltage of the historical period, and if it is found that the second charging amount under the unit voltage has decreased, and If the range of charging capacity under unit voltage is relatively large, it is determined that lithium precipitation has occurred.

Method B: Acquiring the solid-phase potential and liquid-phase potential on the surface of the negative electrode particles of the battery; if the difference between the solid-phase potential and the liquid-phase potential is greater than the second threshold, it is determined that lithium precipitation occurs in the battery.

In this embodiment, under the condition that the lithium precipitation phenomenon does not occur in the battery, the surface of the negative electrode particles of the battery should be in liquid phase potential. The charging device can determine whether the battery of the electronic device has lithium precipitation phenomenon according to the solid phase potential and the liquid phase potential of the negative electrode particle surface of the battery. Specifically, if the difference between the solid phase potential and the liquid phase potential of the negative electrode particle surface of the battery If the value is greater than the second threshold, the charging device can determine that the battery of the electronic device has undergone lithium deposition.

S302. Based on the potential of the negative electrode of the battery of the electronic device, the charging mode and the detection result of lithium analysis, control the charging current of the battery to charge the battery.

In this embodiment, the charging device controls the charging current of the battery of the electronic device based on the detected lithium analysis detection result, the potential of the negative electrode of the battery of the electronic device and the charging mode of the battery of the electronic device, so as to charge the battery of the electronic device. It is understandable that the phenomenon of lithium precipitation occurs in the battery because Li+ is continuously embedded from the positive electrode to the negative electrode during the charging process. Once the insertion speed of lithium ions on the surface of the negative electrode exceeds the capacity of the negative electrode, lithium ions will remain on the surface of the negative electrode. Therefore, if If the detection result of lithium analysis shows that lithium analysis occurs, the charging device can control the charging current of the battery of the electronic device to decrease according to the negative electrode potential of the battery of the electronic device and the corresponding negative electrode potential range of the charging mode of the electronic device, and adopt the reduced charging current. The electric current charges the battery of the electronic device to suppress the phenomenon of lithium precipitation of the battery. For example, if the charging mode of the battery is the above-mentioned first charging mode, the charging device controls the electronic device according to the negative electrode potential of the battery of the electronic device and the first negative electrode potential range The charging current of the battery is reduced, and the battery of the electronic device is charged with the reduced charging current. If the charging mode of the battery is the above-mentioned second charging mode, the charging device will charge the electronic device according to the negative electrode potential of the battery and the second negative electrode potential range of the electronic device. The charging current of the battery of the electronic device is controlled to decrease, and the battery of the electronic device is charged with the reduced charging current. Optionally, the obtained lithium analysis test result can also be that no lithium analysis has occurred. If the lithium analysis test result shows that no lithium analysis has occurred, the charging device can correspond to the negative electrode potential of the battery of the electronic device and the charging mode of the electronic device. The negative potential range of the negative electrode controls the increase of the charging current of the battery of the electronic device, and uses the increased charging current to charge the battery of the electronic device. For example, if the charging mode of the battery is the above-mentioned first charging mode, the charging device will The negative electrode potential of the battery and the first negative electrode potential range control the increase of the charging current of the battery of the electronic device, and use the increased charging current to charge the battery of the electronic device. If the charging mode of the battery is the above-mentioned second charging mode, the charging device The charging current of the battery of the electronic device is controlled to increase according to the potential of the negative electrode of the battery of the electronic device and the potential range of the second negative electrode, and the battery of the electronic device is charged with the increased charging current.

In this embodiment, during the process of charging the battery of the electronic device, the charging device detects whether the battery of the electronic device has a lithium deposition phenomenon, and obtains the detection result of lithium analysis, and then can be based on the negative electrode potential of the battery of the electronic device, the electronic device's The charging mode of the battery and the detection result of lithium analysis, control the charging current of the battery of the electronic device, through this method, the phenomenon of lithium analysis of the battery can be suppressed, the reduction of the battery capacity of the electronic device can be reduced as much as possible, and the service life of the battery of the electronic device can be extended .

FIG. 4 is a flowchart of a battery charging method in one embodiment. In the method for charging the battery in this embodiment, the charging current can be controlled in combination with the lithium deposition phenomenon of the battery and the charging mode. The method is described by taking the method running on the charging device in FIG. 1 as an example. As shown in Figure 4, the above battery charging method includes the following steps:

S401. Determine a charging mode; the charging mode is a first charging mode or a second charging mode, and the charging power or charging time of the first charging mode and the second charging mode are different.

In this embodiment, the implementation principle of step S401 may refer to step S201 in FIG. 2 , which will not be repeated here.

S402. Detect whether lithium precipitation occurs in the battery of the electronic device during charging, and obtain a lithium precipitation detection result.

In this embodiment, the charging device detects whether the battery of the electronic device has a lithium analysis phenomenon during charging, and obtains the lithium analysis detection result. The detection method of the lithium analysis phenomenon can refer to the method in the lithium analysis detection method in the above-mentioned embodiment. A and method B will not be repeated here.

S403. Based on the lithium analysis detection result and the charging mode, control the charging current of the battery to charge the battery.

In this embodiment, the charging device controls the charging current of the battery of the electronic device based on the detected lithium analysis detection result and the charging mode of the battery of the electronic device, so as to charge the battery of the electronic device. It is understandable that the phenomenon of lithium precipitation occurs in the battery because Li+ is continuously embedded from the positive electrode to the negative electrode during the charging process. Once the insertion speed of lithium ions on the surface of the negative electrode exceeds the capacity of the negative electrode, lithium ions will remain on the surface of the negative electrode. Therefore, if If the detection result of lithium analysis shows that lithium analysis occurs, the charging device can control the charging current of the battery of the electronic device to decrease according to the negative electrode potential of the battery of the electronic device and the corresponding negative electrode potential range of the charging mode of the electronic device, and adopt the reduced charging current. The current charges the battery of the electronic device to suppress the phenomenon of lithium precipitation of the battery. For example, if the charging mode of the battery is the first charging mode described above, the charging current of the battery is controlled to decrease, and the reduced charging current is used to control the lithium of the electronic device. Charging batteries. Optionally, the obtained lithium analysis detection result can also be that no lithium analysis occurs. If the lithium analysis detection result shows that no lithium analysis occurs, the charging current of the battery of the electronic device can be controlled to increase appropriately, and the increased The charging current charges the battery of the electronic device. For example, if the charging mode of the battery is the above-mentioned first charging mode, the charging current of the battery of the electronic device is controlled to increase, and the increased charging current is used to charge the battery of the electronic device. charging speed.

In this embodiment, the charging device determines the charging mode of the electronic device, detects whether the lithium analysis phenomenon occurs during the charging process of the battery of the electronic device, obtains the lithium analysis detection result, and then can be based on the obtained lithium analysis detection result and the charging of the electronic device. The mode controls the charging current of the battery of the electronic device. By this method, the phenomenon of lithium deposition of the battery can be suppressed, the reduction of the battery capacity of the electronic device can be reduced as much as possible, and the service life of the battery of the electronic device can be extended.

In the scenario of controlling the charging current of the battery based on the lithium analysis detection result and the charging mode of the electronic device, the charging mode of the electronic device may be the first charging mode. In one embodiment, the above S403 includes: if the charging mode is In the first charging mode, and the result of the lithium analysis detection is that no lithium analysis occurs, the charging current is increased.

In this embodiment, if the charging mode of the electronic equipment is the first charging mode, and the above-mentioned lithium analysis detection result shows that no lithium precipitation occurs, it means that charging the electronic equipment with the current charging current will not cause lithium precipitation in the electronic equipment. phenomenon, the charging device increases the charging current of the electronic device. Optionally, the charging device may detect the negative electrode potential of the battery of the electronic device during the charging process of the battery of the electronic device, and control the charging current of the battery of the electronic device to increase according to the negative electrode potential of the battery and the preset first negative electrode potential range, So that in the process of charging the battery of the electronic device according to the increased current, the negative electrode potential of the battery is within the first negative electrode potential range. Optionally, the charging device can determine the difference between the negative electrode potential of the battery and the maximum value of the preset first negative electrode potential range according to the negative electrode potential of the battery and the preset first negative electrode potential range, and determine the control electron according to the difference. A step current for increasing the charging current of the battery of the device, which is used to control the increase of the charging current of the electronic device.

In this embodiment, if the charging mode of the electronic device is the first charging mode, and the battery of the electronic device does not undergo lithium deposition during the charging process, the charging device increases the charging current of the electronic device to ensure that the battery of the electronic device is charging. During the process, the phenomenon of lithium precipitation does not occur, and at the same time, the demand for the charging speed of electronic equipment is also considered, which can increase the charging rate as much as possible while prolonging the service life of the battery.

In the above scenario of controlling the charging current of the battery based on the lithium analysis detection result and the charging mode of the electronic device, the charging mode of the electronic device may be the second charging mode. In one embodiment, the above S403 includes: if the charging mode is In the second charging mode, and the detection result of lithium precipitation is that lithium precipitation occurs, the charging current is reduced.

In this embodiment, if the charging mode of the electronic device is the second charging mode, and the above-mentioned lithium deposition detection result shows that the lithium deposition phenomenon occurs, it means that charging the electronic device with the current charging current will cause the lithium deposition phenomenon to occur in the electronic device, Then the charging device reduces the charging current of the electronic device. Optionally, the charging device may detect the negative electrode potential of the battery of the electronic device during the charging process of the battery of the electronic device, and control the charging current of the battery of the electronic device to decrease according to the negative electrode potential of the battery and the preset second negative electrode potential range, In the process of charging the battery of the electronic device according to the reduced current, the potential of the negative electrode of the battery is within the second potential range of the negative electrode. Optionally, the charging device can determine the difference between the negative electrode potential of the battery and the minimum value of the preset second negative electrode potential range according to the negative electrode potential of the battery and the preset second negative electrode potential range, and determine the control electron according to the difference. A step current for the reduction of the charging current of the battery of the device, with which the reduction of the charging current of the electronic device is controlled.

In this embodiment, if the charging mode of the electronic device is the second charging mode, and the battery of the electronic device undergoes lithium deposition during the charging process, the charging device reduces the charging current of the electronic device, considering the charging speed of the electronic device At the same time, it is necessary to ensure that the battery of the electronic device does not undergo lithium precipitation during the charging process, so that the charging rate can be increased as much as possible, and the service life of the battery can be extended.

The charging speed and battery service life of the above-mentioned first fast charging mode and the above-mentioned second fast charging mode are verified by experiments, and the results are shown in Figure 5 and Figure 6, the horizontal axis in Figure 5 represents the charging time, and in Figure 5 The vertical axis of the left graph in FIG. 6 represents the negative electrode potential of the battery, and the vertical axis of the right graph in FIG. 6 represents the charging power of the battery. Figure 6 is the verification of the charging method with the limit of φ0=-10mv in the first fast charging mode. From Figure 6, it can be seen that the charging speed of electronic equipment has increased from the original 38min to 35min, and the service life remains the same as before. level, that is, the capacity retention rate is still 80% after 800 cycles. The horizontal axis in FIG. 6 represents the charging time, the vertical axis of the left graph in FIG. 6 represents the negative electrode potential of the battery, and the vertical axis of the right graph in FIG. 6 represents the charging power of the battery. Figure 6 is the verification of the charging method with φ0=0V as the limit in the second fast charging mode. From Figure 6, it can be seen that the charging speed of the electronic device remains the same as the original 34min, and the service life is improved from the original 800 cycles. After 1400 times, the capacity retention rate is 80%. It can be seen from Figure 5 and Figure 6 that the charging speed is controlled by grasping the actual state of the battery in real time, so as to achieve the fastest charging speed when the user needs fast charging, and to improve the service life of the battery when fast charging is not required. The advanced charging strategy can simultaneously suppress the occurrence of lithium precipitation in the battery in real time and ensure the safety of the battery.

It should be understood that although the various steps in the flow charts in FIGS. 2-4 are displayed sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figures 2-4 may include a plurality of sub-steps or stages, these sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, these sub-steps or stages The order of execution is not necessarily performed sequentially, but may be performed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

In one embodiment, as shown in FIG. 7, a battery charging device is provided, including: a determination module and a control module, wherein:

The determination module is used to determine the charging mode; the charging mode is the first charging mode or the second charging mode, and the charging power or charging time of the first charging mode and the second charging mode are different;

The control module is used for controlling the charging current of the battery based on the negative electrode potential and the charging mode of the battery of the electronic device, so as to charge the battery.

The battery charging device provided in this embodiment can execute the above-mentioned method embodiment, and its implementation principle and technical effect are similar, and will not be repeated here.

On the basis of the above embodiments, optionally, the above control module includes: a first control unit, wherein:

The first control unit, if the charging mode is the first charging mode, adjusts the charging current of the battery according to the preset first negative electrode potential range and the negative electrode potential.

Optionally, the potential range of the first negative electrode is φ0≤φ≤0V, where φ is the potential of the negative electrode of the battery, and φ0 is determined according to the life requirements of the battery in the entire life cycle of the electronic device.

On the basis of the above embodiment, optionally, the above first control unit is specifically configured to determine the difference between the negative electrode potential and the boundary value of the first negative electrode potential range if the negative electrode potential is outside the first negative electrode potential range value, adjust the charging current of the battery according to the difference.

On the basis of the above embodiment, optionally, the above-mentioned first control unit is specifically configured to increase the charging current of the battery if the negative electrode potential is greater than the maximum boundary value of the first negative electrode potential range, so that the negative electrode potential of the battery is at Within the potential range of the first negative electrode.

On the basis of the above embodiment, optionally, the above first control unit is specifically configured to reduce the charging current of the battery if the negative electrode potential is less than the minimum boundary value of the first negative electrode potential range, so that the negative electrode potential of the battery is at Within the potential range of the first negative electrode.

On the basis of the above embodiments, optionally, the above control module includes: a second control unit, wherein:

The second control unit is configured to adjust the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential if the charging mode is the second charging mode.

Optionally, the potential range of the second negative electrode is φ≥0V, where φ is the potential of the negative electrode of the battery.

On the basis of the above embodiment, optionally, the above second control unit is specifically configured to determine the difference between the negative electrode potential and the boundary value of the second negative electrode potential range if the negative electrode potential is outside the second negative electrode potential range value, adjust the charging current of the battery according to the difference.

On the basis of the above embodiment, optionally, the above second control unit is specifically configured to reduce the charging current of the battery if the negative electrode potential is less than the minimum boundary value of the second negative electrode potential range, so that the negative electrode potential of the battery is at Within the potential range of the second negative electrode.

On the basis of the above embodiments, optionally, the second control unit is specifically configured to dynamically adjust the charging current of the battery to determine the target charging current according to the second negative electrode potential range, the negative electrode potential and the charging speed requirement of the electronic device.

On the basis of the foregoing embodiments, optionally, the foregoing apparatus further includes: an acquisition module, wherein:

An acquisition module, configured to determine the negative electrode potential according to the negative electrode voltage of the battery and the voltage of the built-in reference electrode of the battery; or,

It is used to obtain the negative electrode potential according to the preset lithium-ion battery model.

On the basis of the above embodiments, optionally, the above device further includes: a detection module, wherein:

The detection module is used to detect whether the battery has a lithium-deposition phenomenon during the process of charging the battery, and obtain a lithium-deposition detection result.

The above-mentioned control module includes a third control unit, wherein the third control unit is configured to control the charging current of the battery to charge the battery based on the negative electrode potential of the battery of the electronic device, the charging mode and the detection result of lithium analysis.

On the basis of the above embodiment, optionally, the above third control unit is used to control the charging current of the battery according to the negative electrode potential of the battery and the negative electrode potential range corresponding to the charging mode if the lithium analysis detection result is a lithium analysis phenomenon. Decrease, use the reduced charging current to charge the battery; if the lithium analysis test result shows that no lithium analysis occurs, then control the battery’s charging current to increase according to the negative electrode potential of the battery and the negative electrode potential range corresponding to the charging mode, and use the increased charging current to charge the battery. The larger charging current charges the battery.

On the basis of the foregoing embodiments, optionally, the foregoing detection module includes: a first detection unit, wherein:

The first detection unit is used to obtain the first charging amount of the battery at the unit voltage at the current moment and the second charging amount of the battery at the unit voltage at the previous historical moment; if the second charging amount is less than the first charging amount, and If the difference between the second charging amount and the first charging amount is greater than the first threshold, it is determined that the battery has a lithium deposition phenomenon.

On the basis of the foregoing embodiments, optionally, the foregoing detection module includes: a second detection unit, wherein:

The second detection unit is used to obtain the solid-phase potential and liquid-phase potential on the surface of the negative electrode particles of the battery; if the difference between the solid-phase potential and the liquid-phase potential is greater than a second threshold, it is determined that the battery has lithium precipitation.

The division of each module in the above battery charging device is only for illustration. In other embodiments, the battery charging device can be divided into different modules according to needs, so as to complete all or part of the functions of the above battery charging device.

For specific limitations on the battery charging device, reference may be made to the above-mentioned limitations on the battery charging method, which will not be repeated here. Each module in the above-mentioned battery charging device can be fully or partially realized by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, as shown in FIG. 8, a battery charging device is provided, including: a determination module, a detection module and a control module, wherein:

The control module is used to control the charging current of the battery based on the lithium analysis detection result and the charging mode, so as to charge the battery.

The first control unit is configured to increase the charging current if the charging mode is the first charging mode, and the lithium deposition detection result shows that lithium deposition does not occur.

On the basis of the above-mentioned embodiments, optionally, the above-mentioned first control unit is specifically configured to detect the negative electrode potential of the battery during the charging process of the battery; control the increase of the charging current according to the negative electrode potential and the preset first negative electrode potential range , so that in the process of charging the battery according to the increased current, the potential of the negative electrode is within the first potential range of the negative electrode.

The second control unit is configured to reduce the charging current if the charging mode is the second charging mode, and the detection result of lithium deposition indicates that lithium deposition occurs.

On the basis of the above embodiment, optionally, the above second control unit is specifically configured to detect the negative electrode potential of the battery during the charging process of the battery; control the charging current to decrease according to the negative electrode potential and the preset second negative electrode potential range , so that in the process of charging the battery according to the reduced current, the potential of the negative electrode is within the second potential range of the negative electrode.

Fig. 9 is a schematic diagram of the internal structure of the charging device in one embodiment. As shown in FIG. 9, the charging device includes a processor and a memory connected through a system bus. Among them, the processor is used to provide computing and control capabilities to support the operation of the entire electronic device. The memory may include non-volatile storage media and internal memory. Nonvolatile storage media store operating systems and computer programs. The computer program can be executed by a processor to implement a battery charging method provided in the following embodiments. The internal memory provides a high-speed running environment for the operating system computer program in the non-volatile storage medium. The charging device can be any electronic device such as charger, mobile power supply, mobile phone, tablet computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point of Sales, sales of electronic equipment), vehicle-mounted computer, wearable device, etc.

In one embodiment, a charging device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Based on the negative electrode potential and charging mode of the battery of the electronic device, the charging current of the battery is controlled to charge the battery.

The implementation principle and technical effect of the charging device provided in the foregoing embodiments are similar to those of the foregoing method embodiments, and will not be repeated here.

Detect whether the battery of electronic equipment has lithium precipitation during the charging process, and obtain the detection result of lithium precipitation;

Based on the detection result of lithium analysis and the charging mode, the charging current of the battery is controlled to charge the battery.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

The implementation principles and technical effects of the computer-readable storage medium provided in the foregoing embodiments are similar to those of the foregoing method embodiments, and will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile memory and volatile memory. Nonvolatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in many forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Synchlink DRAM (SLDRAM), Memory Bus (Rambus) Direct RAM (RDRAM), Direct Memory Bus Dynamic RAM (DRDRAM), and Memory Bus Dynamic RAM (RDRAM).

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A battery charging method applied to electronic equipment, characterized in that it comprises:

Determine the charging mode, the charging mode is the first charging mode or the second charging mode;

If the charging mode is the first charging mode, then according to the preset first negative electrode potential range and the negative electrode potential of the battery of the electronic device, adjust the charging current of the battery so that the negative electrode potential is at the specified Within the range of the first negative electrode potential;

If the charging mode is the second charging mode, adjusting the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential, so that the negative electrode potential is at the second negative electrode potential Within the range; the maximum value of the first negative electrode potential range is less than or equal to the minimum value of the second negative electrode potential range.
The method according to claim 1, wherein the adjusting the charging current of the battery according to the preset first negative electrode potential range and the negative electrode potential of the battery of the electronic device comprises:

If the negative electrode potential is outside the first negative electrode potential range, determining the difference between the negative electrode potential and the boundary value of the first negative electrode potential range, and adjusting the charging of the battery according to the difference current.
The method according to claim 1, characterized in that,

If the negative electrode potential is greater than the maximum boundary value of the first negative electrode potential range, increasing the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range.
The method according to claim 1, characterized in that,

If the negative electrode potential is less than the minimum boundary value of the first negative electrode potential range, then reduce the charging current of the battery so that the negative electrode potential of the battery is within the first negative electrode potential range.
The method according to any one of claims 1-4, wherein the potential range of the first negative electrode is φ0≤φ≤0V, where φ is the potential of the negative electrode of the battery, and the φ0 is based on the full range of the electronic device The lifetime requirements of the battery within the lifetime are determined.
The method according to claim 1, wherein the adjusting the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential comprises:

If the negative electrode potential is outside the second negative electrode potential range, determining the difference between the negative electrode potential and the boundary value of the second negative electrode potential range, and adjusting the charging of the battery according to the difference current.
The method according to claim 1, characterized in that,

If the negative electrode potential is less than the minimum boundary value of the second negative electrode potential range, reduce the charging current of the battery so that the negative electrode potential of the battery is within the second negative electrode potential range.
The method according to claim 1 or any one of claims 6-7, wherein the potential range of the second negative electrode is φ≥0V, where φ is the potential of the negative electrode of the battery.
The method according to claim 1, wherein the adjusting the charging current of the battery according to the preset second negative electrode potential range and the negative electrode potential comprises:

The charging current of the battery is adjusted according to the second negative electrode potential range, the negative electrode potential and the charging speed requirement of the electronic device.
The method according to claim 1, wherein the method for obtaining the negative electrode potential comprises:

determining the negative electrode potential according to the negative electrode voltage of the battery and the voltage of a built-in reference electrode of the battery; or,

The negative electrode potential is obtained according to a preset lithium-ion battery model.
The method according to claim 1, further comprising:

In the process of charging the battery, it is detected whether the lithium precipitation phenomenon occurs in the battery, and the detection result of lithium precipitation is obtained;

Based on the negative potential of the battery of the electronic device, the charging mode and the detection result of lithium analysis, the charging current of the battery is controlled to charge the battery.
The method according to claim 11, wherein the charging current of the battery is controlled based on the negative electrode potential of the battery of the electronic device, the charging mode and the detection result of lithium analysis, so as to charge the battery to the battery. Battery charging, including:

If the lithium analysis detection result shows that the lithium analysis phenomenon occurs, the charging current of the battery is controlled to decrease according to the negative electrode potential of the battery and the negative electrode potential range corresponding to the charging mode, and the reduced charging current is used to charge the battery. charging the battery;

If the lithium analysis detection result is that no lithium analysis occurs, then the charging current of the battery is controlled to increase according to the negative electrode potential of the battery and the negative electrode potential range corresponding to the charging mode, and the increased charging current is used to control the charging current of the battery. The battery is charged.
The method according to claim 11 or 12, wherein the detecting whether the battery has a lithium precipitation phenomenon includes:

Obtaining the first charge amount of the battery at the unit voltage at the current moment and the second charge amount of the battery at the unit voltage at the previous historical moment;

If the second charge amount is less than the first charge amount, and the difference between the second charge amount and the first charge amount is greater than a first threshold, then it is determined that lithium precipitation occurs in the battery.
The method according to claim 11 or 12, wherein the detecting whether the battery has a lithium precipitation phenomenon includes:

Obtaining the solid-phase potential and liquid-phase potential of the negative electrode particle surface of the battery;

If the difference between the solid-phase potential and the liquid-phase potential is greater than a second threshold, it is determined that the battery has a lithium precipitation phenomenon.
A battery charging method applied to electronic equipment, characterized in that it comprises:

Determine the charging mode; the charging mode is the first charging mode or the second charging mode;

Detecting whether lithium precipitation occurs in the battery of the electronic device during the charging process, and obtaining the detection result of lithium precipitation;

If the charging mode is the first charging mode, and the lithium analysis detection result is that no lithium analysis occurs, then increase the charging current;

If the charging mode is the second charging mode, and the lithium deposition detection result is lithium deposition phenomenon, the charging current is reduced.
The method according to claim 15, wherein the increasing the charging current comprises:

During the charging process of the battery, detecting the negative electrode potential of the battery;

Controlling the increase of the charging current according to the negative electrode potential and a preset first negative electrode potential range, so that during charging the battery according to the increased current, the negative electrode potential is located at the first negative electrode potential within range.
The method according to claim 16, wherein the first negative electrode potential range is φ0≤φ≤0V, where φ is the potential of the negative electrode of the battery, and the φ0 is based on the electric potential of the battery in the entire life cycle of the electronic device. Lifetime requirements are determined.
The method according to claim 15, wherein the reducing the charging current comprises:

During the charging process of the battery, detecting the negative electrode potential of the battery;

Controlling the reduction of the charging current according to the negative electrode potential and a preset second negative electrode potential range, so that the negative electrode potential is located at the second negative electrode potential during the charging process of the battery according to the reduced current. within range.
The method according to claim 18, wherein the potential range of the second negative electrode is φ≥0V, where φ is the potential of the negative electrode of the battery.
A battery charging device, characterized in that it comprises:

A determining module, configured to determine a charging mode, where the charging mode is the first charging mode or the second charging mode;

A charging module, configured to adjust the charging current of the battery according to the charging mode, wherein,

If the charging mode is the first charging mode, then adjust the charging current of the battery according to the preset first negative potential range and the negative potential of the battery of the electronic device, so that the negative potential is at the first negative potential within the scope;

If the charging mode is the second charging mode, then according to the preset second negative electrode potential range and the negative electrode potential, adjust the charging current of the battery so that the negative electrode potential is within the second negative electrode potential range within; the maximum value of the first negative electrode potential range is less than or equal to the minimum value of the second negative electrode potential range.
A battery charging device, characterized in that it comprises:

A determining module, configured to determine a charging mode; the charging mode is the first charging mode or the second charging mode;

The detection module is used to detect whether the battery of the electronic device has a lithium precipitation phenomenon during the charging process, and obtain the detection result of the lithium analysis;

A control module, configured to control the charging current of the battery to charge the battery based on the lithium analysis detection result and the charging mode, wherein,

If the charging mode is the first charging mode, and the lithium analysis detection result is that no lithium analysis occurs, then increase the charging current;

If the charging mode is the second charging mode, and the lithium deposition detection result is lithium deposition phenomenon, the charging current is reduced.
A charging device, comprising a memory and a processor, wherein a computer program is stored in the memory, wherein when the computer program is executed by the processor, the processor executes any one of claims 1-14. A method for charging a battery or a step of a method for charging a battery as claimed in any one of claims 15 to 19.
A computer-readable storage medium on which a computer program is stored, wherein when the computer program is executed by a processor, the method according to any one of claims 1 to 14 or any one of claims 15 to 19 is implemented. The steps of any one of the battery charging methods.