CN113030750B - Method and device for detecting remaining service parameters of lithium battery - Google Patents

Abstract

The application relates to the technical field of lithium batteries, and particularly discloses a method and a device for detecting remaining use parameters of a lithium battery. The method comprises the following steps: acquiring the current voltage of the lithium battery; and determining the residual energy and the residual service time corresponding to the current voltage of the lithium battery according to a first preset mapping relation between the voltage of the lithium battery and the residual energy and a second preset mapping relation between the voltage of the lithium battery and the residual service time. The method comprises the steps of pre-forming a mapping relation between voltage and residual energy and a mapping relation between the voltage and residual service time, determining the residual energy and the residual service time of the lithium battery according to the current voltage of the lithium battery in the actual detection process, and having high detection efficiency.

Description

Method and device for detecting remaining service parameters of lithium battery

technical field

The invention relates to the technical field of lithium batteries, in particular to a detection method and device for remaining service parameters of lithium batteries.

Background technique

With the development of technology, lithium batteries have been widely used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, uninterruptible power supplies for post and telecommunications, and electric tools, electric bicycles, electric motorcycles, electric vehicles, military equipment , aerospace and other mobile devices. With the rapid development of the new energy field, lithium batteries are more and more widely used in various mobile devices, and lithium battery related technologies are also developing rapidly.

For mobile devices equipped with lithium batteries, users need to know the remaining working time and remaining energy of lithium batteries in real time, so as to charge them in time and ensure the operation of mobile devices. However, most of the current lithium battery manufacturers are investing in the calculation of the remaining power of lithium batteries, and there is a certain error between the calculation results of the remaining power and the actual situation. Currently, there are few studies on the remaining use time and remaining energy of lithium batteries.

Contents of the invention

Based on this, it is necessary to provide a detection method and device for the remaining use parameters of the lithium battery for the problem of how to obtain the remaining use time and remaining energy of the lithium battery in real time.

A method for detecting the remaining use parameters of a lithium battery, the method is used to detect the remaining energy and remaining use time of the lithium battery during discharge; the method includes:

Obtain the current voltage of the lithium battery;

According to the first preset mapping relationship between the voltage of the lithium battery and the remaining energy, and the second preset mapping relationship between the voltage of the lithium battery and the remaining service time, determine the remaining energy and the remaining energy corresponding to the current voltage of the lithium battery. remaining usage time.

In one of the embodiments, before the step of obtaining the current voltage of the lithium battery, the method further includes:

Obtain the mapping relationship between the voltage and the remaining power when the lithium battery is discharged at a constant preset discharge power;

determining a first preset mapping relationship between remaining energy and voltage according to the mapping relationship between voltage and remaining power;

According to the first preset mapping relationship between the remaining energy and the voltage, and the preset discharge power, a second preset mapping relationship between the remaining use time and the voltage is determined.

In one of the embodiments, the mapping relationship between the voltage and the remaining power includes a relationship curve between the voltage and the remaining power, and according to the mapping relationship between the voltage and the remaining power, the first step between the remaining energy and the voltage is determined. The steps of preset mapping relationship include:

Integrate the relationship curve between the voltage and the remaining power to obtain the remaining energy of the lithium battery;

A first preset mapping relationship between the remaining energy and the voltage of the lithium battery is formed.

In one of the embodiments, the step of determining the second preset mapping relationship between the remaining usage time and the voltage according to the first preset mapping relationship between the remaining energy and the voltage and the preset discharge power includes:

Determine the remaining service time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relationship;

A second preset mapping relationship between remaining usage time and voltage is formed.

In one of the embodiments, the step of obtaining the mapping relationship between the voltage and the remaining power during the discharge of the lithium battery at a constant preset discharge power includes:

controlling the lithium battery to discharge with several constant preset discharge powers;

The mapping relationship between the voltage and the remaining power of the lithium battery under each constant preset discharge power is obtained respectively.

In one embodiment, during the discharge process of the lithium battery, the method further includes: detecting the voltage and current of the lithium battery in real time, and updating the mapping relationship between the voltage of the lithium battery and the remaining power.

A detection device for the remaining use parameters of a lithium battery, the device is used to detect the remaining energy and remaining use time of the lithium battery during discharge; the device includes:

The first obtaining unit is used to obtain the current voltage of the lithium battery;

The first determination unit is configured to determine the current state of the lithium battery according to the first preset mapping relationship between the voltage of the lithium battery and the remaining energy, and the second preset mapping relationship between the voltage of the lithium battery and the remaining service time. The remaining energy and remaining usage time corresponding to the voltage.

In one of the embodiments, the device also includes:

The second acquisition unit is used to acquire the mapping relationship between the voltage and the remaining power when the lithium battery is discharged with a constant preset discharge power;

The second determining unit is configured to determine a first preset mapping relationship between remaining energy and voltage according to a mapping relationship between voltage and remaining power;

The third determination unit is configured to determine a second preset mapping relationship between the remaining usage time and the voltage according to the first preset mapping relationship between the remaining energy and the voltage and the preset discharge power.

An electronic device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the method for detecting the remaining usage parameters of a lithium battery as described above is implemented.

A computer-readable storage medium, wherein computer instructions are stored in the computer-readable storage medium, and when the computer instructions are executed by a processor, the method for detecting remaining usage parameters of a lithium battery as described above is implemented.

The method for detecting the remaining usage parameters of the above-mentioned lithium battery is used to detect the remaining energy and remaining service time of the lithium battery during the discharge process. The first preset mapping relationship and the second preset mapping relationship between the voltage of the lithium battery and the remaining usage time determine the remaining energy and the remaining usage time corresponding to the current voltage of the lithium battery. That is, the mapping relationship between voltage and remaining energy, and the mapping relationship between voltage and remaining service time are formed in advance. In the actual detection process, according to the current voltage of the lithium battery, the remaining energy and remaining service time of the lithium battery can be determined, and the detection efficiency High, and because the voltage of the lithium battery will also change during the discharge process, the pre-formed mapping relationship in this embodiment is determined according to the actual voltage during the discharge process, which conforms to the actual change law, so the detection provided by this embodiment The accuracy of the method is high.

Description of drawings

FIG. 1 is a flowchart of an implementation of a method for detecting the remaining usage parameters of a lithium battery provided in Example 1 of the present application;

FIG. 2 is a flowchart of another implementation of the method for detecting the remaining usage parameters of lithium batteries provided in Embodiment 1 of the present application;

FIG. 3 is a flow chart of step S120 in the method for detecting remaining usage parameters of lithium batteries provided in Embodiment 1 of the present application;

FIG. 4 is a flow chart of step S130 in the method for detecting remaining usage parameters of lithium batteries provided in Embodiment 1 of the present application;

FIG. 5 is a flow chart of step S110 in the method for detecting remaining usage parameters of lithium batteries provided in Embodiment 1 of the present application;

Fig. 6 is a mapping relationship diagram of remaining power and voltage formed in a specific example;

Fig. 7 is a mapping relationship diagram of remaining power and remaining energy formed in a specific example;

Fig. 8 is a mapping relationship diagram of residual energy and voltage formed in a specific example;

FIG. 9 is a mapping relation diagram of remaining usage time and voltage formed in a specific example;

FIG. 10 is a comparison chart of the calculated remaining usage time and the actual usage time formed in a specific example;

FIG. 11 is a schematic structural diagram of a detection device for remaining usage parameters of a lithium battery provided in Embodiment 2 of the present application;

FIG. 12 is a schematic structural diagram of a detection device for remaining usage parameters of a lithium battery provided in Embodiment 2 of the present application;

FIG. 13 is a schematic structural diagram of an electronic device provided in Embodiment 3 of the present application.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Due to the advantages of high energy, long service life and green environmental protection, lithium batteries have been widely used in energy storage power systems such as water power, fire power, wind power and solar power stations, uninterruptible power supply systems for post and telecommunications, as well as power tools and electric bicycles. , electric motorcycles, electric vehicles, military equipment, aerospace and other mobile devices in various fields.

Among them, as an emerging technology field, lithium batteries are more and more widely used in the above-mentioned types of mobile devices, and the related technologies of lithium batteries are also developing rapidly. For mobile devices equipped with lithium batteries, users often need to know the remaining usage parameters of the lithium battery in real time, such as remaining energy and remaining usage time, so as to charge the lithium battery in time and ensure the continuous normal operation of the mobile device. However, the current lithium battery manufacturers often only calculate the remaining power of the lithium battery, and there are few studies on the remaining energy and remaining service time of the lithium battery.

The currently existing methods for obtaining the remaining energy and remaining service time of lithium batteries are generally to calculate the remaining power Q of lithium batteries by voltage testing method/battery modeling method/current integration method, etc., and multiply the remaining power Q by the lithium battery The nominal voltage V obtains the remaining energy E of the lithium battery, and the remaining energy E of the lithium battery is divided by the current power P to obtain the remaining service time T of the lithium battery. However, the voltage of the lithium battery is not constant during the discharge process. Taking the 18650-ternary lithium battery (currently the mainstream application in the market) as an example, when the lithium battery is fully charged, the voltage is as high as 4.2V. When all are discharged, the voltage is about 2.5V, and the difference between the two is as high as 68% ((4.2-2.5)/2.5*100%). It can be seen that there is a large error between the remaining usage time and remaining energy of the lithium battery obtained by the current method, and the actual remaining usage time and remaining energy of the battery, which is easy to mislead the user, and the actual acquisition of the lithium battery has not been realized. The purpose of the true remaining usage time and remaining energy.

To address the above problems, embodiments of the present application provide a method for detecting remaining usage parameters of a lithium battery, a device for detecting remaining usage parameters of a lithium battery, electronic equipment, and a computer-readable storage medium.

Embodiment one

This embodiment provides a method for detecting remaining usage parameters of a lithium battery, and the method is used to detect the remaining energy and remaining usage time of the lithium battery during discharge. Wherein, the lithium battery may include various types of lithium batteries such as ternary lithium battery or lithium iron phosphate battery, which will not be listed here.

Referring to Fig. 1, the detection method of the remaining usage parameters of the lithium battery provided in this embodiment includes the following steps:

Step S200, acquiring the current voltage of the lithium battery.

Wherein, when the lithium battery is in a running process, it is in a discharge state. Generally, when the lithium battery is in a discharge state, its voltage will gradually decrease. In this embodiment, the voltage during operation of the lithium battery, that is, the current voltage, can be obtained in real time for subsequent processing, and the current voltage at different discharge times is different. In practical applications, the current voltage of the lithium battery can be obtained by a conventional voltage detection method.

Step S400, according to the first preset mapping relationship between the voltage of the lithium battery and the remaining energy, and the second preset mapping relationship between the voltage of the lithium battery and the remaining service time, determine the current voltage corresponding to the lithium battery Remaining energy and remaining usage time.

After the current voltage of the lithium battery is acquired, the remaining energy and remaining service time corresponding to the current voltage of the lithium battery can be determined according to the pre-stored first and second preset mapping relationships. Wherein, the first preset mapping relationship is used to indicate the correspondence between the voltage of the lithium battery and the remaining energy, the second preset mapping relationship is used to indicate the correspondence between the voltage of the lithium battery and the remaining service time, and the first preset It is assumed that both the mapping relationship and the second preset mapping relationship are pre-formed and stored in a corresponding memory according to the actual discharge process of the lithium battery, so as to be recalled in step S400.

The method for detecting the remaining usage parameters of the above-mentioned lithium battery is used to detect the remaining energy and remaining service time of the lithium battery during the discharge process. The first preset mapping relationship and the second preset mapping relationship between the voltage of the lithium battery and the remaining usage time determine the remaining energy and the remaining usage time corresponding to the current voltage of the lithium battery. That is, the mapping relationship between voltage and remaining energy, and the mapping relationship between voltage and remaining service time are formed in advance. In the actual detection process, according to the current voltage of the lithium battery, the remaining energy and remaining service time of the lithium battery can be determined, and the detection efficiency High, and because the voltage of the lithium battery will also change during the discharge process, the pre-formed mapping relationship in this embodiment is determined according to the actual voltage during the discharge process, which conforms to the actual change law, so the detection provided by this embodiment The accuracy of the method is high.

In one of the embodiments, referring to FIG. 2, before step S200, that is, the step of obtaining the current voltage of the lithium battery, the method for detecting the remaining usage parameters of the lithium battery provided by this embodiment further includes forming a first preset map relationship and the steps of the second preset mapping relationship, specifically including:

Step S110, obtaining the mapping relationship between the voltage and the remaining power when the lithium battery is being discharged with a constant preset discharge power.

Discharging at a constant discharge power means that during the discharge process, the voltage of the lithium battery gradually decreases, the current gradually increases, and the output power remains unchanged throughout the discharge process. When the lithium battery is discharged at a constant preset discharge power, the voltage and remaining power of the lithium battery at different times are obtained according to the preset time interval. When the corresponding relationship between the voltage of the lithium battery and the remaining power at several times is obtained, it can be formed The mapping relationship between voltage and remaining power. The mapping relationship may be in the form of a table, or in the form of a curve, or in other forms. Preferably, in this embodiment, the mapping relationship between the voltage and the remaining power is expressed in the form of a curve.

Step S120, according to the mapping relationship between the voltage and the remaining power, determine a first preset mapping relationship between the remaining energy and the voltage.

Since there is a certain relationship between the remaining energy of the lithium battery and the remaining power and voltage, when the mapping relationship between the voltage and the remaining power is determined, according to the relationship between the remaining energy of the lithium battery, the remaining power and the voltage, The remaining energy corresponding to the voltage is determined, and then a first preset mapping relationship between the remaining energy and the voltage is formed. Likewise, the first preset mapping relationship may be in the form of a table, or in the form of a curve, or in other forms. Preferably, the first preset mapping relationship is expressed in the form of a curve, which is more intuitive.

Step S130 , according to the first preset mapping relationship between the remaining energy and the voltage, and the preset discharge power, determine a second preset mapping relationship between the remaining usage time and the voltage.

Since there is a relationship between the remaining service time of the lithium battery and the remaining energy and voltage, when the first preset mapping relationship between the remaining energy and the voltage is determined, the remaining service time of the lithium battery and the remaining energy and voltage can be determined. The relationship between them determines the remaining usage time corresponding to the voltage, and then forms a second preset mapping relationship between the remaining usage time and the voltage. Likewise, the second preset mapping relationship may be in the form of a table, or in the form of a curve, or in other forms. Preferably, the second preset mapping relationship is expressed in the form of a curve, which is more intuitive.

It should be noted that the first preset mapping relationship and the second preset mapping relationship can be formed in the same mapping relationship form, for example, the corresponding relationship between the remaining service time, remaining energy and voltage of the lithium battery is unified in the same curve in the figure. After obtaining the current voltage of the lithium battery, the remaining energy and the remaining use time can be determined directly through the same curve relationship diagram. Of course, the first preset mapping relationship and the second preset mapping relationship can also be divided into two separate representations, which is not specifically limited in this embodiment, as long as the remaining usage time and remaining energy can be determined through the mapping relationship.

In one embodiment, referring to FIG. 3, step S120, that is, the mapping relationship between the voltage and the remaining power includes a relationship curve between the voltage and the remaining power, and according to the mapping relationship between the voltage and the remaining power, determine the remaining The steps of the first preset mapping relationship between energy and voltage include:

Step S121, performing an integral operation on the relationship curve between the voltage and the remaining power to obtain the remaining energy of the lithium battery;

Step S122, forming a first preset mapping relationship between the remaining energy and the voltage of the lithium battery.

Since the product of the voltage and the remaining power is equivalent to the remaining energy, the remaining energy of the lithium battery can be obtained by integrating the relationship between the voltage and the remaining power. Then, on the basis of the relationship curve of voltage-remaining power, a first preset mapping relationship between the remaining energy of the lithium battery and the voltage can be formed.

In one of the embodiments, referring to FIG. 4, step S130, that is, according to the first preset mapping relationship between the remaining energy and the voltage, and the preset discharge power, determine the second preset relationship between the remaining use time and the voltage. The steps for setting up the mapping relationship include:

Step S131. Determine the remaining usage time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relationship;

Step S132, forming a second preset mapping relationship between the remaining usage time and the voltage.

Since the remaining energy divided by the current power is equal to the remaining use time of the lithium battery, when the remaining energy is determined, the remaining energy can be divided by the current preset discharge power to obtain the corresponding remaining use time of the lithium battery. The first preset mapping relationship between the remaining energy and the voltage is determined before, on this basis, the second preset mapping relationship between the remaining usage time and the voltage can be further determined.

In one embodiment, referring to FIG. 5, step S110, that is, the step of obtaining the mapping relationship between the voltage and the remaining power during the discharge of the lithium battery at a constant preset discharge power includes:

Step S111, controlling the lithium battery to discharge with several constant preset discharge powers;

Step S112 , respectively obtaining the mapping relationship between the voltage and the remaining power of the lithium battery under each constant preset discharge power.

Since lithium batteries have different corresponding electrical parameters under different discharge powers, for example, in this embodiment, under different discharge powers, the mapping relationship between the voltage and the remaining power is different, and furthermore, the subsequent obtained The first preset mapping relationship is also different from the second preset mapping relationship. Considering that there will be different discharge powers in the actual use process, in the process of forming the mapping relationship in this embodiment, the lithium battery is controlled to discharge under several constant preset discharge powers. For each discharge power situation, A mapping relationship between the voltage and the remaining power is formed respectively.

At the same time, in the process of forming the subsequent first preset mapping relationship and the second preset mapping relationship, each discharge power is also separately targeted. That is, each constant discharge power corresponds to a set of first preset mapping relationships and second preset mapping relationships.

In step S400, the current discharge power of the lithium battery can be determined first, and then the corresponding first preset mapping relationship and the second preset mapping relationship are obtained, and finally the calculation is performed.

In one of the embodiments, during the discharge process of the lithium battery, the method for detecting the remaining usage parameters of the lithium battery provided by this embodiment further includes: detecting the voltage and current of the lithium battery in real time, and updating the voltage and remaining value of the lithium battery. The mapping relationship between electric quantities. In turn, the calculation deviation caused by the performance change after the lithium battery decays can be avoided.

The following uses a specific example to compare the detection method for the remaining service parameters of the lithium battery provided in this embodiment with the traditional detection method:

In this specific example, the lithium battery is detected with a constant discharge power of 9.36W output state, and the calculation method involves a fixed voltage value calculation method, an integral algorithm (constant power) and an integral algorithm (constant current).

Step 1. First, use two calculation methods of constant power and constant current to establish the corresponding discharge curves of voltage-remaining power (that is, the mapping relationship between voltage and remaining power), as shown in FIG. 6 . After fully charged, the voltage of the lithium battery is as high as 4.2V. During the discharge process, the voltage gradually decreases. When the power is 0%, the voltage is as low as 2.5V. Compared with constant current, due to the high voltage at the beginning of discharge, the discharge current of constant power output is small, and the voltage drops slowly. When the voltage is lower than 3.6V, due to the voltage drop, the discharge current of the constant power output increases, and the voltage drop becomes faster.

Step 2. Calculate and obtain the corresponding remaining power-remaining energy mapping table through the integral algorithm (constant power), integral algorithm (constant current) and fixed voltage value calculation methods, refer to FIG. 7 . Calculation method of fixed voltage value: measure the voltage V of the lithium battery, and obtain the remaining power Q of the lithium battery according to the mapping table of voltage and remaining power obtained earlier, and the remaining energy of the lithium battery E=Q*3.6V. Integral algorithm (constant current): Integrate the corresponding voltage-remaining power curve (integrate from right to left) to obtain the remaining energy E of the lithium battery. Integral algorithm (constant power): Integrate the corresponding voltage-remaining power curve (integrate from right to left) to obtain the remaining energy E of the lithium battery. Further, the mapping tables of the remaining energy and the remaining power are respectively obtained.

Step 3. According to the discharge curve of voltage-remaining power obtained in step 1, convert the mapping table of remaining energy and remaining power obtained in step 2 into a mapping table of remaining energy and voltage (that is, the first preset mapping relationship), Refer to Figure 8.

Step 4: Dividing the remaining energy by the constant power is the remaining use time. Accordingly, the remaining energy in the mapping table of remaining energy and voltage obtained in step 3 is converted into remaining use time to obtain a mapping table of remaining use time and voltage ( That is, the second preset mapping relationship), refer to FIG. 9 .

Apply the remaining usage time and voltage mapping table corresponding to the three calculation methods obtained in step 4 to calculate the remaining usage time corresponding to the real-time voltage, and compare the calculated remaining usage time with the actual used time, refer to the figure 10. According to the comparison, it is found that the remaining usage time calculated by the integral algorithm (constant power) corresponds to the actual used time (the remaining usage time decreases equally with the increase of the used time), while the integration algorithm (constant power) and integral The remaining usage time calculated by the algorithm (constant current) does not accurately correspond to the actual usage time. Therefore, the remaining service time calculated by the integral algorithm (constant power) in this embodiment is in line with the actual situation, and conforms to the actual operating conditions of the lithium battery in many scenarios. Compared with the traditional detection method, the detection method of this solution The result is highly accurate.

Embodiment two

This embodiment provides a detection device for the remaining use parameters of the lithium battery, which is used to detect the remaining energy and remaining use time of the lithium battery during the discharge process.

Referring to FIG. 11 , the device for detecting remaining usage parameters of a lithium battery provided in this embodiment includes a first acquiring unit 200 and a first determining unit 400 .

The first acquisition unit 200 is used to acquire the current voltage of the lithium battery;

The first determining unit 400 is used to determine the current state of the lithium battery according to the first preset mapping relationship between the voltage of the lithium battery and the remaining energy, and the second preset mapping relationship between the voltage of the lithium battery and the remaining service time. The remaining energy and remaining usage time corresponding to the voltage.

The detection device for the remaining use parameters of the lithium battery is used to detect the remaining energy and remaining use time of the lithium battery during the discharge process. The first preset mapping relationship and the second preset mapping relationship between the voltage of the lithium battery and the remaining usage time determine the remaining energy and the remaining usage time corresponding to the current voltage of the lithium battery. That is, the mapping relationship between voltage and remaining energy, and the mapping relationship between voltage and remaining service time are formed in advance. In the actual detection process, according to the current voltage of the lithium battery, the remaining energy and remaining service time of the lithium battery can be determined, and the detection efficiency High, and because the voltage of the lithium battery will also change during the discharge process, the pre-formed mapping relationship in this embodiment is determined according to the actual voltage during the discharge process, which conforms to the actual change law, so the accuracy is relatively high.

In one embodiment, referring to FIG. 12 , the device for detecting remaining usage parameters of lithium batteries provided in this embodiment further includes a second acquisition unit 110 , a second determination unit 120 and a third determination unit 130 .

The second obtaining unit 110 is used to obtain the mapping relationship between the voltage and the remaining power when the lithium battery is discharged with a constant preset discharge power;

The second determination unit 120 is configured to determine a first preset mapping relationship between the remaining energy and the voltage according to the mapping relationship between the voltage and the remaining power;

The third determining unit 130 is configured to determine a second preset mapping relationship between the remaining usage time and the voltage according to the first preset mapping relationship between the remaining energy and the voltage and the preset discharge power.

In one of the embodiments, the second determination unit 120 is used to perform an integral operation on the relationship curve between the voltage and the remaining power to obtain the remaining energy of the lithium battery, and then form the first preset value between the remaining energy and the voltage of the lithium battery Mapping relations.

In one of the embodiments, the third determination unit 130 is configured to determine the remaining usage time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relationship, and then form the relationship between the remaining usage time and the voltage The second preset mapping relationship of .

In one of the embodiments, the second obtaining unit 110 is used to respectively obtain the discharge power of the lithium battery under each constant preset discharge power when controlling the lithium battery to discharge at several constant preset discharge powers. , the mapping relationship between voltage and remaining power.

The device for detecting the remaining service parameters of the lithium battery provided in this embodiment and the method for detecting the remaining service parameters of the lithium battery provided in the first embodiment belong to the same inventive concept. For details, please refer to the detailed description in the first embodiment, which will not be repeated here. repeat.

Embodiment Three

The embodiment of the present application provides an electronic device, as shown in FIG. 13 , including a memory 500 and a processor 600. The memory 500 and the processor 600 are connected to each other through a bus or in other ways. In FIG. 13, through Take the bus connection as an example.

The processor 600 may be a central processing unit (Central Processing Unit, CPU). The processor 600 may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or Other chips such as programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above-mentioned types of chips.

As a non-transitory computer-readable storage medium, the memory 500 can be used to store non-transitory software programs, non-transitory computer-executable programs and modules, such as the method for detecting remaining usage parameters of a lithium battery in the embodiment of the present invention. The processor 600 executes various functional applications and data processing of the processor 600 by running the non-transitory software programs, instructions and modules stored in the memory 500 , that is, the detection method of the remaining usage parameters of the lithium battery.

The memory 500 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created by the processor 600 and the like. In addition, the memory 500 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 500 may optionally include memory located remotely relative to the processor 600, and these remote memories may be connected to the processor through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Those skilled in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be completed by instructing related hardware through computer programs, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviation: HDD) or a solid-state drive (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the above-mentioned types of memory.

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

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (7)

1. A method for detecting remaining usage parameters of a lithium battery, said method being used to detect remaining energy and remaining usage time of said lithium battery during discharge; it is characterized in that said method comprises: Obtaining the mapping relationship between the voltage and the remaining power during the discharge of the lithium battery at a constant preset discharge power; the mapping relationship between the voltage and the remaining power includes a relationship curve between the voltage and the remaining power; Integrate the relationship curve between the voltage and the remaining power to obtain the remaining energy of the lithium battery; forming a first preset mapping relationship between the remaining energy of the lithium battery and the voltage; determining a second preset mapping relationship between remaining usage time and voltage according to a first preset mapping relationship between remaining energy and voltage, and the preset discharge power; Obtain the current voltage of the lithium battery; According to the first preset mapping relationship between the remaining energy and the voltage, and the second preset mapping relationship between the remaining use time and the voltage, the remaining energy and the remaining use time corresponding to the current voltage of the lithium battery are determined. 2. The method for detecting remaining usage parameters of a lithium battery according to claim 1, characterized in that, according to the first preset mapping relationship between remaining energy and voltage, and the preset discharge power, the remaining usage time and The steps of the second preset mapping relationship between the voltages include: determining the remaining usage time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relationship; A second preset mapping relationship between remaining usage time and voltage is formed. 3. The method for detecting the remaining usage parameters of the lithium battery according to claim 1, characterized in that the step of obtaining the mapping relationship between the voltage and the remaining power during the discharge of the lithium battery with a constant preset discharge power include: controlling the lithium battery to discharge with several constant preset discharge powers; The mapping relationship between the voltage and the remaining power of the lithium battery under each constant preset discharge power is acquired respectively. 4. The detection method of the remaining usage parameters of the lithium battery according to claim 1, characterized in that, during the discharge process of the lithium battery, the method further comprises: detecting the voltage and current of the lithium battery in real time, and updating the lithium battery The mapping relationship between the voltage and the remaining power. 5. A detection device for the remaining usage parameters of a lithium battery, characterized in that the device is used to detect the remaining energy and remaining usage time of the lithium battery during discharge; it is characterized in that the device includes: The first acquisition unit is used to acquire the current voltage of the lithium battery; The first determination unit is configured to determine the current state of the lithium battery according to the first preset mapping relationship between the voltage of the lithium battery and the remaining energy, and the second preset mapping relationship between the voltage of the lithium battery and the remaining service time. The remaining energy and remaining use time corresponding to the voltage; The second acquisition unit is used to acquire the mapping relationship between the voltage and the remaining power when the lithium battery is discharged with a constant preset discharge power; The second determining unit is configured to determine a first preset mapping relationship between remaining energy and voltage according to a mapping relationship between voltage and remaining power; The third determination unit is configured to determine a second preset mapping relationship between the remaining usage time and the voltage according to the first preset mapping relationship between the remaining energy and the voltage and the preset discharge power. 6. An electronic device, characterized in that it comprises a memory and a processor, the memory stores a computer program, and the processor implements the lithium battery according to any one of claims 1-4 when executing the computer program The remaining detection methods use parameters. 7. A computer-readable storage medium, characterized in that, computer instructions are stored in the computer-readable storage medium, and when the computer instructions are executed by a processor, the lithium battery according to any one of claims 1-4 is realized. A method for detecting the remaining usage parameters of the battery.

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