CN113030750A - Method and device for detecting residual use parameters of lithium battery - Google Patents
Method and device for detecting residual use parameters of lithium battery Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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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
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a method and a device for detecting remaining use parameters of a lithium battery.
Background
With the development of technology, lithium batteries are widely used in energy storage power systems such as hydraulic power, fire power, wind power and solar power stations, uninterruptible power supplies for post and telecommunications communication, and mobile devices in various fields such as electric tools, electric bicycles, electric motorcycles, electric automobiles, military equipment and aerospace. With the rapid development of the new energy field, the application of the lithium battery in various mobile devices is increasingly wide, and the related technology of the lithium battery is rapidly developed.
For the mobile device equipped with the lithium battery, the user needs to know the remaining working time and the remaining energy of the lithium battery in real time so as to charge in time and ensure the work of the mobile device. However, most of the current lithium battery manufacturers are put into the aspect of calculating the residual capacity of the lithium battery, a certain error exists between the calculation result of the residual capacity and the actual situation, and the research on the residual service time and the residual energy of the lithium battery is less at present.
Disclosure of Invention
Based on this, it is necessary to provide a method and an apparatus for detecting remaining usage parameters of a lithium battery, aiming at the problem of how to obtain the remaining usage time and the remaining energy of the lithium battery in real time.
A detection method for residual use parameters of a lithium battery is used for detecting residual energy and residual use time in the discharging process of the 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.
In one embodiment, before the step of obtaining the current voltage of the lithium battery, the method further includes:
acquiring a mapping relation between voltage and residual electric quantity in the process that the lithium battery discharges with constant preset discharge power;
determining a first preset mapping relation between the residual energy and the voltage according to the mapping relation between the voltage and the residual electric quantity;
and determining a second preset mapping relation between the residual service time and the voltage according to a first preset mapping relation between the residual energy and the voltage and the preset discharging power.
In one embodiment, the mapping relationship between the voltage and the remaining capacity includes a voltage-remaining capacity relationship curve, and the step of determining the first preset mapping relationship between the remaining capacity and the voltage according to the mapping relationship between the voltage and the remaining capacity includes:
performing integral operation on the relation curve of the voltage and the residual electric quantity to obtain the residual energy of the lithium battery;
and forming a first preset mapping relation between the residual energy and the voltage of the lithium battery.
In one embodiment, the step of determining a second preset mapping relationship between the remaining usage time and the voltage according to a first preset mapping relationship between the remaining energy and the voltage and a preset discharging power includes:
determining the remaining service time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relation;
and forming a second preset mapping relation between the residual service time and the voltage.
In one embodiment, the step of obtaining a mapping relationship between a voltage and a remaining capacity in a process of discharging the lithium battery with a constant preset discharge power includes:
controlling the lithium battery to discharge at a plurality of constant preset discharge powers;
and respectively obtaining the mapping relation between the voltage and the residual capacity of the lithium battery under each constant preset discharge power.
In one embodiment, during the discharging of the lithium battery, the method further comprises: and detecting the voltage and the current of the lithium battery in real time, and updating the mapping relation between the voltage and the residual electric quantity of the lithium battery.
The device is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery; the device comprises:
the first obtaining unit is used for obtaining the current voltage of the lithium battery;
the first determining unit is used for 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 and the residual energy of the lithium battery and a second preset mapping relation between the voltage and the residual service time of the lithium battery.
In one embodiment, the apparatus further comprises:
the second obtaining unit is used for obtaining the mapping relation between the voltage and the residual electric quantity in the process that the lithium battery discharges with the constant preset discharging power;
the second determining unit is used for determining a first preset mapping relation between the residual energy and the voltage according to the mapping relation between the voltage and the residual electric quantity;
and the third determining unit is used for determining a second preset mapping relation between the residual service time and the voltage according to the first preset mapping relation between the residual energy and the voltage and the preset discharging power.
An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to realize the method for detecting the residual use parameters of the lithium battery.
A computer readable storage medium, wherein computer instructions are stored in the computer readable storage medium, and when executed by a processor, the computer instructions implement the method for detecting the remaining usage parameters of the lithium battery as described above.
The method for detecting the residual service parameters of the lithium battery is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery, and firstly, the current voltage of the lithium battery is obtained, and then the residual energy and the residual service time corresponding to the current voltage of the lithium battery are determined according to a first preset mapping relation between the pre-stored 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, wherein the detection efficiency is high.
Drawings
Fig. 1 is a flowchart of a method for detecting remaining usage parameters of a lithium battery according to an embodiment of the present disclosure;
fig. 2 is a block flow diagram of another implementation manner of a method for detecting remaining usage parameters of a lithium battery according to an embodiment of the present application;
fig. 3 is a block flow diagram of step S120 in the method for detecting remaining usage parameters of a lithium battery according to an embodiment of the present application;
fig. 4 is a flowchart of step S130 in the method for detecting remaining usage parameters of a lithium battery according to an embodiment of the present application;
fig. 5 is a flowchart of step S110 in the method for detecting remaining usage parameters of a lithium battery according to an embodiment of the present application;
FIG. 6 is a diagram illustrating a mapping relationship between remaining power and voltage according to an exemplary embodiment;
FIG. 7 is a diagram illustrating a mapping relationship between remaining power and remaining energy according to an exemplary embodiment;
FIG. 8 is a graph of the resulting residual energy versus voltage mapping in a specific example;
FIG. 9 is a graph of remaining usage time versus voltage formed in a specific example;
FIG. 10 is a graph illustrating calculated remaining usage time versus actual usage time developed in one particular example;
fig. 11 is a schematic structural diagram of a device for detecting remaining usage parameters of a lithium battery according to a second embodiment of the present application;
fig. 12 is a schematic structural diagram of a device for detecting remaining usage parameters of a lithium battery according to a second embodiment of the present application;
fig. 13 is a schematic structural diagram of an electronic device according to a third embodiment of the present application.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Because the lithium battery has the advantages of high energy, long service life, environmental protection and the like, the lithium battery is widely applied to energy storage power systems of hydraulic power, firepower, wind power, solar power stations and the like, uninterruptible power systems of post and telecommunications communication, and mobile equipment in various fields such as electric tools, electric bicycles, electric motorcycles, electric automobiles, military equipment, aerospace and the like.
As a new technical field, the application of lithium batteries in various mobile devices is becoming more and more extensive, and the related technology of lithium batteries is also rapidly developing. For a mobile device equipped with a lithium battery, a user often needs to know the remaining use parameters of the lithium battery in real time, such as the remaining energy and the remaining use time, so as to charge the lithium battery in time and ensure that the mobile device continuously and normally works. However, the existing lithium battery manufacturers often only calculate the residual electric quantity of the lithium battery, and research on the residual energy and the residual service life of the lithium battery is less.
The existing method for acquiring the remaining energy and the remaining service time of the lithium battery generally includes calculating to obtain the remaining electric quantity Q of the lithium battery through a voltage test method, a battery modeling method, a current integration method and the like, obtaining the remaining energy E of the lithium battery by multiplying the remaining electric quantity Q by the nominal voltage V of the lithium battery, and dividing the remaining energy E of the lithium battery by the current power P to further obtain the remaining service time T of the lithium battery. However, since the voltage of the lithium battery is not fixed during the discharging process, taking 18650-ternary lithium battery (currently in the market mainstream application) as an example, when the lithium battery is fully charged, the voltage is as high as 4.2V, and when the battery is fully discharged, the voltage is about 2.5V, and the difference between the two is as high as 68% ((4.2-2.5)/2.5 x 100%). Therefore, the residual service time and the residual energy of the lithium battery obtained by the conventional method have larger errors with the actual residual service time and the actual residual energy of the lithium battery, which is easy to mislead users, and the purpose of obtaining the actual residual service time and the actual residual energy of the lithium battery is not actually realized.
In view of the foregoing 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, an electronic device, and a computer-readable storage medium.
Example one
The embodiment provides a method for detecting the residual service parameters of a lithium battery, which is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery. The lithium battery may include various types of lithium batteries, such as a ternary lithium battery or a lithium iron phosphate battery, which are not listed here.
Referring to fig. 1, the method for detecting remaining usage parameters of a lithium battery provided in this embodiment includes the following steps:
and step S200, acquiring the current voltage of the lithium battery.
In general, when the lithium battery is in a discharge state, the voltage of the lithium battery is gradually reduced. In the embodiment, the voltage of the lithium battery in the operation process, namely the current voltage, can be obtained in real time so as to carry out subsequent treatment, and the current voltages at different discharging moments are different. In practical application, the current voltage of the lithium battery can be obtained by a conventional voltage detection method.
Step S400, 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 and the residual energy of the lithium battery and a second preset mapping relation between the voltage and the residual service time of the lithium battery.
After the current voltage of the lithium battery is obtained, the remaining energy and the remaining service time corresponding to the current voltage of the lithium battery can be determined according to a first preset mapping relation and a second preset mapping relation which are prestored. The first preset mapping relationship is used for representing the corresponding relationship between the voltage and the residual energy of the lithium battery, the second preset mapping relationship is used for representing the corresponding relationship between the voltage and the residual service time of the lithium battery, and the first preset mapping relationship and the second preset mapping relationship are both formed in advance according to the actual discharging process of the lithium battery and are stored in corresponding memories so as to be called in the step S400.
The method for detecting the residual service parameters of the lithium battery is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery, and firstly, the current voltage of the lithium battery is obtained, and then the residual energy and the residual service time corresponding to the current voltage of the lithium battery are determined according to a first preset mapping relation between the pre-stored 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, wherein the detection efficiency is high.
In one embodiment, referring to fig. 2, before step S200, that is, before the step of obtaining the current voltage of the lithium battery, the method for detecting the remaining usage parameters of the lithium battery provided in this embodiment further includes a step of forming a first preset mapping relationship and a second preset mapping relationship, and specifically includes:
step S110, obtaining a mapping relation between voltage and residual capacity in the process that the lithium battery discharges with constant preset discharging power.
The discharge with the constant discharge power means that in the discharge process, the voltage of the lithium battery is gradually reduced, the current is gradually increased, and the output power is kept unchanged in the whole discharge process. When the lithium battery discharges with constant preset discharge power, the voltage and the residual capacity of the lithium battery at different moments are obtained according to preset time intervals, and when the corresponding relation between the voltage and the residual capacity of the lithium battery at a plurality of moments is obtained, the mapping relation between the voltage and the residual capacity can be formed. The mapping relation may be in the form of a table, a curve, or other forms. Preferably, in this embodiment, the mapping relationship between the voltage and the remaining capacity is represented in a form of a curve.
Step S120, determining a first preset mapping relationship between the residual energy and the voltage according to the mapping relationship between the voltage and the residual electric quantity.
Because there is a certain correlation between the residual energy of the lithium battery and the residual electric quantity and the voltage, when the mapping relationship between the voltage and the residual electric quantity is determined, the residual energy corresponding to the voltage can be determined according to the relationship between the residual energy of the lithium battery and the residual electric quantity and the voltage, and then a first preset mapping relationship between the residual energy and the voltage is formed. Similarly, the first preset mapping relationship may be in a table form, a curve form, or other forms. Preferably, the first preset mapping relationship is represented in a curve form, and is more intuitive.
Step S130, determining a second preset mapping relationship between the remaining service time and the voltage according to a first preset mapping relationship between the remaining energy and the voltage and a preset discharging power.
Because the relationship exists between the remaining service time of the lithium battery and the remaining energy and the voltage, when the first preset mapping relationship between the remaining energy and the voltage is determined, the remaining service time corresponding to the voltage can be determined according to the relationship between the remaining service time of the lithium battery and the remaining energy and the voltage, and then the second preset mapping relationship between the remaining service time and the voltage is formed. Similarly, the second preset mapping relationship may be in a table form, a curve form, or other forms. Preferably, the second preset mapping relationship is represented in a curve form, and is more intuitive.
It should be noted that the first preset mapping relationship and the second preset mapping relationship may be formed in the same mapping relationship form, for example, the corresponding relationships between the remaining service time, the remaining energy and the voltage of the lithium battery are unified in the same graph. After the current voltage of the lithium battery is obtained, the remaining energy and the remaining service time can be determined directly through the same curve relation diagram. Of course, the first preset mapping relationship and the second preset mapping relationship may also be divided into two separate representations, which are not specifically limited in this embodiment as long as the remaining usage time and the remaining energy can be determined through the mapping relationships.
In one embodiment, referring to fig. 3, in step S120, that is, the mapping relationship between the voltage and the remaining capacity includes a voltage-remaining capacity curve, and the step of determining the first preset mapping relationship between the remaining capacity and the voltage according to the mapping relationship between the voltage and the remaining capacity includes:
step S121, carrying out integral operation on the relation curve of the voltage and the residual electric quantity to obtain the residual energy of the lithium battery;
and step S122, forming a first preset mapping relation between the residual energy and the voltage of the lithium battery.
Because the product of the voltage and the residual capacity is equal to the residual energy, the residual energy of the lithium battery can be obtained by performing integral operation on the voltage-residual capacity relation curve. Then, on the basis of the voltage-residual capacity relation curve, a first preset mapping relation between the residual energy and the voltage of the lithium battery can be formed.
In one embodiment, referring to fig. 4, the step S130 of determining 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 discharging power includes:
step S131, determining the remaining service time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relation;
step S132, forming a second preset mapping relationship between the remaining usage time and the voltage.
The value of the remaining energy divided by the current using power is equal to the remaining using time of the lithium battery, when the remaining energy is determined, the remaining energy can be divided by the current preset discharging power to further obtain the remaining using time of the corresponding lithium battery, and on the basis that the first preset mapping relation of the remaining energy and the voltage is determined, the second preset mapping relation between the remaining using time and the voltage can be further determined.
In one embodiment, referring to fig. 5, in step S110, that is, in the process of obtaining the mapping relationship between the voltage and the remaining capacity of the lithium battery during discharging of the lithium battery at the constant preset discharging power, the step includes:
s111, controlling the lithium battery to discharge at a plurality of constant preset discharge powers;
and step S112, respectively obtaining the mapping relation between the voltage and the residual electric quantity of the lithium battery under each constant preset discharge power.
For example, in the embodiment, the mapping relationship between the voltage and the remaining capacity is different under different discharge powers, and further, the first preset mapping relationship and the second preset mapping relationship obtained subsequently are different. In view of the fact that different discharge powers exist in the actual use process, in the process of forming the mapping relationship in the embodiment, the lithium battery is controlled to discharge under a plurality of constant preset discharge powers, and the mapping relationship between the voltage and the residual capacity is formed for each discharge power situation.
Meanwhile, in the process of forming the subsequent first preset mapping relation and the second preset mapping relation, each discharge power is also respectively aimed at. That is, each constant discharge power corresponds to a set of the first preset mapping relation and the second preset mapping relation.
In step S400, the current discharge power of the lithium battery may be determined first, and then the corresponding first preset mapping relationship and second preset mapping relationship are obtained, and finally, the calculation is performed.
In one embodiment, in the discharging process of the lithium battery, the method for detecting the remaining use parameters of the lithium battery provided in this embodiment further includes: and detecting the voltage and the current of the lithium battery in real time, and updating the mapping relation between the voltage and the residual electric quantity of the lithium battery. And further, calculation deviation caused by performance change after the lithium battery is attenuated can be avoided.
The following describes a method for detecting remaining usage parameters of a lithium battery according to this embodiment by comparing with a conventional detection method with a specific example:
in this specific example, for the lithium battery to be detected in a constant discharge power 9.36W output state, the calculation method involves a fixed voltage value calculation method, an integration algorithm (constant power), and an integration algorithm (constant current).
Firstly, a constant power and a constant current calculation method are used to respectively establish a corresponding voltage-residual capacity discharge curve (i.e. a mapping relation between voltage and residual capacity), and refer to fig. 6. After the lithium battery is fully charged, the voltage of the lithium battery reaches 4.2V, the voltage is gradually reduced in the discharging process, and the voltage is reduced to 2.5V when the electric quantity is 0%. Compared with the constant current, the discharge current of constant power output is small and the voltage drop is slow because the voltage is higher when the discharge is started. When the voltage is lower than 3.6V, the discharge current of constant power output is increased due to the voltage reduction, and the voltage reduction is fast.
And step two, respectively calculating and obtaining corresponding mapping tables of the residual electric quantity and the residual energy through an integral algorithm (constant power), an integral algorithm (constant current) and a fixed voltage value calculation method, and referring to fig. 7. The fixed voltage value calculation method comprises the following steps: and measuring the voltage V of the lithium battery, and obtaining the residual electricity Q of the lithium battery according to the mapping table of the voltage and the residual electricity obtained in the previous step, wherein the residual energy E of the lithium battery is Q x 3.6V. Integration algorithm (galvanostatic): and (4) carrying out integral (integration from right to left) operation on the corresponding voltage-residual capacity curve to obtain the residual energy E of the lithium battery. Integration algorithm (constant power): and integrating the corresponding voltage-residual capacity curve (integrating from right to left) to obtain the residual energy E of the lithium battery. And then mapping tables of the residual energy and the residual electric quantity are obtained respectively.
And step three, converting the mapping table of the residual energy and the residual electric quantity obtained in the step two into a mapping table (namely a first preset mapping relation) of the residual energy and the voltage according to the discharge curve of the voltage and the residual electric quantity obtained in the step one, and referring to fig. 8.
Step four, the remaining energy is divided by the constant power to obtain the remaining service time, and the remaining energy in the mapping table of the remaining energy and the voltage obtained in step three is converted into the remaining service time, so as to obtain the mapping table (i.e. the second preset mapping relationship) of the remaining service time and the voltage, referring to fig. 9.
And (3) respectively applying the mapping tables of the remaining service time and the voltage obtained in the fourth step and corresponding to the three calculation methods to calculate the remaining service time corresponding to the real-time voltage, and comparing the calculated remaining service time with the actual used time, referring to fig. 10. According to the comparison, the residual using time calculated by the integral algorithm (constant power) accurately corresponds to the actual used time (the residual using time is reduced in an equal amount along with the increase of the used time), and the residual using time calculated by the integral algorithm (constant power) and the integral algorithm (constant current) does not accurately correspond to the actual used time. Therefore, the remaining service time calculated by the integral algorithm (constant power) in the embodiment is in accordance with the actual situation, and the actual operation conditions of the lithium battery under numerous scenes are met.
Example two
The embodiment provides a detection device for the residual use parameters of a lithium battery, which is used for detecting the residual energy and the residual use time in the discharging process of the lithium battery.
Referring to fig. 11, the apparatus for detecting remaining usage parameters of a lithium battery provided in this embodiment includes a first obtaining unit 200 and a first determining unit 400.
The first obtaining unit 200 is configured to obtain a current voltage of the lithium battery;
the first determining unit 400 is configured to determine the remaining energy and the remaining service time corresponding to the current voltage of the lithium battery according to a first preset mapping relationship between the voltage and the remaining energy of the lithium battery and a second preset mapping relationship between the voltage and the remaining service time of the lithium battery.
The detection device for the residual service parameters of the lithium battery is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery, firstly, the current voltage of the lithium battery is obtained, and then the residual energy and the residual service time corresponding to the current voltage of the lithium battery are determined according to a first preset mapping relation between the pre-stored 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, wherein the detection efficiency is high, the voltage of the lithium battery can be changed along with the change of the current voltage of the lithium battery in the discharge process, and the pre-formed mapping relation is determined according to the actual voltage in the discharge process, so that the actual change rule is met, and the accuracy is high.
In one embodiment, referring to fig. 12, the apparatus for detecting remaining usage parameters of a lithium battery provided in this embodiment further includes a second obtaining unit 110, a second determining unit 120, and a third determining unit 130.
The second obtaining unit 110 is configured to obtain a mapping relationship between a voltage and a remaining power in a process that the lithium battery discharges with a constant preset discharging power;
the second determining 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 a first preset mapping relationship between the remaining energy and the voltage and a preset discharging power.
In one embodiment, the second determining unit 120 is configured 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, so as to form a first preset mapping relationship between the remaining energy of the lithium battery and the voltage.
In one embodiment, the third determining unit 130 is configured to determine the remaining service time of the lithium battery according to a preset discharging power and the remaining energy in the first preset mapping relationship, so as to form a second preset mapping relationship between the remaining service time and the voltage.
In one embodiment, the second obtaining unit 110 is configured to obtain a mapping relationship between a voltage and a remaining capacity of the lithium battery at each constant preset discharging power when the lithium battery is controlled to discharge at a plurality of constant preset discharging powers.
The device for detecting the remaining usage parameters of the lithium battery provided in this embodiment and the method for detecting the remaining usage parameters of the lithium battery provided in the first embodiment belong to the same inventive concept, and specific contents can be referred to the detailed description in the first embodiment, which is not described herein again.
EXAMPLE III
The embodiment of the present application provides an electronic device, as shown in fig. 13, including a memory 500 and a processor 600, where the memory 500 and the processor 600 are communicatively connected with each other, and may be connected through a bus or in another manner, and fig. 13 takes the example of connection through a bus as an example.
The memory 500, which is a non-transitory computer readable storage medium, 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, i.e., a method for detecting remaining usage parameters of a lithium battery, by executing non-transitory software programs, instructions and modules stored in the memory 500.
The memory 500 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 600, and the like. Further, the memory 500 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 500 optionally includes memory located remotely from processor 600, which may be connected to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A detection method for residual use parameters of a lithium battery is used for detecting residual energy and residual use time in the discharging process of the lithium battery; characterized in that the method comprises:
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.
2. The method for detecting the remaining usage parameters of the lithium battery as claimed in claim 1, wherein before the step of obtaining the current voltage of the lithium battery, the method further comprises:
acquiring a mapping relation between voltage and residual electric quantity in the process that the lithium battery discharges with constant preset discharge power;
determining a first preset mapping relation between the residual energy and the voltage according to the mapping relation between the voltage and the residual electric quantity;
and determining a second preset mapping relation between the residual service time and the voltage according to a first preset mapping relation between the residual energy and the voltage and the preset discharging power.
3. The method as claimed in claim 2, wherein the mapping relationship between the voltage and the remaining capacity includes a voltage-remaining capacity relationship curve, and the step of determining the first preset mapping relationship between the remaining energy and the voltage according to the mapping relationship between the voltage and the remaining capacity includes:
performing integral operation on the relation curve of the voltage and the residual electric quantity to obtain the residual energy of the lithium battery;
and forming a first preset mapping relation between the residual energy and the voltage of the lithium battery.
4. The method for detecting the remaining usage parameters of the lithium battery as claimed in claim 2, wherein the step of determining the second predetermined mapping relationship between the remaining usage time and the voltage according to the first predetermined mapping relationship between the remaining energy and the voltage and the predetermined discharge power comprises:
determining the remaining service time of the lithium battery according to the preset discharge power and the remaining energy in the first preset mapping relation;
and forming a second preset mapping relation between the residual service time and the voltage.
5. The method for detecting the remaining usage parameters of the lithium battery as claimed in claim 2, wherein the step of obtaining the mapping relationship between the voltage and the remaining capacity of the lithium battery in the process of discharging the lithium battery with the constant preset discharging power comprises:
controlling the lithium battery to discharge at a plurality of constant preset discharge powers;
and respectively obtaining the mapping relation between the voltage and the residual capacity of the lithium battery under each constant preset discharge power.
6. The method for detecting the remaining use parameters of the lithium battery as claimed in claim 2, wherein during the discharging process of the lithium battery, the method further comprises: and detecting the voltage and the current of the lithium battery in real time, and updating the mapping relation between the voltage and the residual electric quantity of the lithium battery.
7. The device for detecting the residual service parameters of the lithium battery is characterized in that the device is used for detecting the residual energy and the residual service time in the discharging process of the lithium battery; characterized in that the device comprises:
the first obtaining unit is used for obtaining the current voltage of the lithium battery;
the first determining unit is used for 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 and the residual energy of the lithium battery and a second preset mapping relation between the voltage and the residual service time of the lithium battery.
8. The apparatus for detecting the remaining usage parameters of a lithium battery as claimed in claim 7, further comprising:
the second obtaining unit is used for obtaining the mapping relation between the voltage and the residual electric quantity in the process that the lithium battery discharges with the constant preset discharging power;
the second determining unit is used for determining a first preset mapping relation between the residual energy and the voltage according to the mapping relation between the voltage and the residual electric quantity;
and the third determining unit is used for determining a second preset mapping relation between the residual service time and the voltage according to the first preset mapping relation between the residual energy and the voltage and the preset discharging power.
9. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the method for detecting remaining usage parameters of a lithium battery as claimed in any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, wherein computer instructions are stored in the computer-readable storage medium, and when executed by a processor, the computer instructions implement the method for detecting the remaining usage parameter of the lithium battery according to any one of claims 1 to 6.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918409A (en) * | 2010-05-27 | 2013-02-06 | 诺基亚公司 | Method of evaluating remaining power of a battery for portable devices |
| JP2014010003A (en) * | 2012-06-28 | 2014-01-20 | Hitachi Ltd | Battery module and state estimation method of the same |
| CN103869255A (en) * | 2014-03-18 | 2014-06-18 | 南京航空航天大学 | Micro-miniature electric unmanned aerial vehicle endurance time estimation method |
| CN109541479A (en) * | 2018-10-26 | 2019-03-29 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of predictor method and device of battery remaining power |
| CN109683101A (en) * | 2018-12-20 | 2019-04-26 | 安徽优旦科技有限公司 | A method of battery remaining power is obtained based on SOC-OCV curve |
| CN110954829A (en) * | 2019-11-22 | 2020-04-03 | 山东信通电子股份有限公司 | Mobile Internet of things terminal power supply method and device and storage medium |
| CN111025969A (en) * | 2019-12-05 | 2020-04-17 | 浙江大学 | Wild animal monitoring system and method based on information fusion |
-
2021
- 2021-02-18 CN CN202110187320.2A patent/CN113030750B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918409A (en) * | 2010-05-27 | 2013-02-06 | 诺基亚公司 | Method of evaluating remaining power of a battery for portable devices |
| JP2014010003A (en) * | 2012-06-28 | 2014-01-20 | Hitachi Ltd | Battery module and state estimation method of the same |
| CN103869255A (en) * | 2014-03-18 | 2014-06-18 | 南京航空航天大学 | Micro-miniature electric unmanned aerial vehicle endurance time estimation method |
| CN109541479A (en) * | 2018-10-26 | 2019-03-29 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of predictor method and device of battery remaining power |
| CN109683101A (en) * | 2018-12-20 | 2019-04-26 | 安徽优旦科技有限公司 | A method of battery remaining power is obtained based on SOC-OCV curve |
| CN110954829A (en) * | 2019-11-22 | 2020-04-03 | 山东信通电子股份有限公司 | Mobile Internet of things terminal power supply method and device and storage medium |
| CN111025969A (en) * | 2019-12-05 | 2020-04-17 | 浙江大学 | Wild animal monitoring system and method based on information fusion |
Non-Patent Citations (1)
| Title |
|---|
| 毛丽霞: "铅酸电池剩余放电时间的研究", 《当代化工》 * |
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