CN110988704A - Battery charging detection method, device and equipment - Google Patents
Battery charging detection method, device and equipment Download PDFInfo
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- CN110988704A CN110988704A CN201911104870.2A CN201911104870A CN110988704A CN 110988704 A CN110988704 A CN 110988704A CN 201911104870 A CN201911104870 A CN 201911104870A CN 110988704 A CN110988704 A CN 110988704A
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- G—PHYSICS
- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
A battery charge detection method includes: acquiring a charging curve corresponding to a lead-acid battery to be detected; detecting a groove in the charging curve according to a groove characteristic; determining the type of the groove according to the detected current change characteristics of the groove; when the groove type is a preset fault type, prompt information that the lead-acid battery is out of control due to water shortage is generated, so that a battery user can find abnormal states of the battery in the charging process more timely, the possibility of battery accidents is effectively reduced, and the use safety of the battery is improved.
Description
Technical Field
The present application relates to the field of batteries, and in particular, to a battery charging detection method, apparatus, and device.
Background
With the improvement of living standard of people, more and more people choose to buy vehicles as travel tools. With the increase of the awareness of human environment protection, the electric vehicle is more and more commonly used. The electric vehicle not only can obviously improve the energy conversion efficiency, but also is beneficial to reducing the emission of greenhouse gases, improving the air quality and reducing the noise pollution.
In recent years, with the continuous expansion of the electric vehicle market, the problem caused by the explosion of the electric vehicle battery is more and more serious, and if the battery fault cannot be found in time, the battery fault can bring great potential safety hazard to battery users, such as electric vehicle owners.
Disclosure of Invention
In view of this, embodiments of the present application provide a method, an apparatus, and a device for detecting battery charging, so as to solve the problem that a battery fault cannot be found in time in the prior art, and a great potential safety hazard may be brought to a battery user.
A first aspect of an embodiment of the present application provides a battery charge detection method, including:
acquiring a charging curve corresponding to a lead-acid battery to be detected;
detecting a groove in the charging curve according to a groove characteristic;
determining the type of the groove according to the detected current change characteristics of the groove;
and when the type of the groove is a preset fault type, generating a prompt message that the lead-acid battery is out of control due to water shortage.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the step of detecting a notch in the charging curve according to a notch characteristic includes:
the charging curve comprises a descending curve and an ascending curve, and the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value;
and the difference value between the current before descending and the current after ascending is smaller than a second preset value.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the step of detecting a notch in the charging curve according to a notch characteristic includes:
the charging curve comprises a descending curve and an ascending curve, and the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value;
and the current difference of the ascending section is larger than or equal to the preset proportional value of the current difference of the descending section.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining the type of the groove according to the detected current variation characteristic of the groove includes:
determining that the current change speed of the current descending section is greater than a first speed threshold, the current change speed of the ascending section is less than a second speed threshold, and the current of the descending section is greater than a third preset value:
if the difference value of the current before descending minus the current after ascending is larger than or equal to a fourth preset value, the groove type corresponding to the charging curve is a plurality of charging equipment types;
and if the difference value of the current before the falling minus the current after the rising is less than a fourth preset value, the groove type is a fault type.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the determining the type of the groove according to the detected current variation characteristic of the groove includes:
when the current change speeds of the current descending sections are all smaller than the second speed threshold value and the current change speed of the ascending section is larger than the first speed threshold value, the groove type corresponding to the charging curve is a plurality of charging equipment types.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the determining the type of the groove according to the detected current variation characteristic of the groove includes:
determining that the current change speeds of the current descending sections are all smaller than a second speed threshold;
if the current change speed of the ascending section is smaller than a second speed threshold value, and the time length between the time point corresponding to the end position of the current ascending section and the time point of the current end position is longer than a preset time length, the groove type is a fault type;
if the current change speed of the ascending section is smaller than a second speed threshold value, and the current difference between the current before descending and the current after ascending is smaller than a second preset value, the groove type is a fault type;
and if the current change speed of the ascending section is less than a second speed threshold value, and the difference value between the current after ascending and the current before descending is greater than a second preset value, the groove type is a multi-device type.
With reference to the first aspect, in a sixth possible implementation manner of the first aspect, before the step of detecting a notch in the charging curve according to a notch characteristic, the method further includes:
and determining whether the charging curve comprises a current oscillation signal or not according to the current change amplitude and the current change times.
A second aspect of an embodiment of the present application provides a battery charge detection apparatus, including:
the charging curve acquiring unit is used for acquiring a charging curve corresponding to the lead-acid battery to be detected;
the groove detection unit is used for detecting a groove in the charging curve according to the groove characteristics;
the groove type detection unit is used for determining the type of the groove according to the detected current change characteristics of the groove;
and the prompting unit is used for generating a prompting message that the lead-acid battery is in water shortage thermal runaway when the type of the groove is a preset fault type.
With reference to the second aspect, in a first possible implementation manner of the second aspect,
with reference to the second aspect, in a second possible implementation manner of the second aspect,
a third aspect of the embodiments of the present application provides a battery charge detection device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the battery charge detection method according to any one of the first aspect when executing the computer program.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the battery charge detection method according to any one of the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that: the groove included in the charging curve obtained through groove characteristic detection is further determined according to the current change characteristics of the groove, and when the groove type is a preset fault type, prompt information that the steel groove battery is out of water thermal runaway is generated, so that a battery user can find abnormal states of the battery in the charging process more timely, the possibility of battery accidents is effectively reduced, and the use safety of the battery is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating an implementation of a battery charging detection method according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating an implementation of a groove type detection method according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart illustrating an implementation of another groove type detection method provided in the embodiment of the present application;
fig. 4 is a schematic diagram of a battery charging detection apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a battery charge detection device provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a battery charging detection method provided in an embodiment of the present application, which is detailed as follows:
in step S101, a charging curve corresponding to a lead-acid battery to be detected is obtained;
specifically, the lead acid battery (VRLA) may be a secondary battery in which the electrode is mainly made of lead and its oxide and the electrolyte is a sulfuric acid solution. The lead-acid battery has the characteristics of less self-discharge and long service life, and is used in products such as automobiles and the like. The lead-acid battery may have problems such as leakage due to improper use or use environment. If the lead-acid battery leaks, the lead-acid battery can be thermally out of control, explosion and fire accidents can be caused, or the surrounding environment can be affected.
In order to find the abnormality of the lead-acid battery in time, the charging curve of the lead-acid battery can be analyzed. When the lead-acid battery is charged, a charging curve corresponding to the lead-acid battery can be obtained through a charging pile, and a charging vehicle corresponding to the charging curve can be determined according to a charging order generated by the charging pile. The charging curve can be a current change curve recorded by a charging pile when the lead-acid battery is in a charging battery.
In step S102, detecting a groove in the charging curve according to a groove characteristic;
before the groove included in the charging curve is detected, the charging curve can be subjected to oscillation detection, that is, whether the charging curve includes a current oscillation signal or not is determined according to the current change amplitude and the current change times.
If the amplitude of the current rising or falling is greater than a predetermined oscillation threshold, for example, the amplitude of the current rising or falling is greater than 0.4-0.6A, and the number of rising times and the number of falling times are both greater than a predetermined number of times, for example, the number of falling times and the number of rising times are both greater than 4, it may be determined that the charging curve includes the current oscillation signal. If the charging curve comprises the current oscillation signal, the oscillation signal can be eliminated from the charging curve, or the influence caused by current oscillation can be eliminated when the current drops or rises subsequently, so that the accuracy of current detection is improved.
The depth of the groove feature and the current height difference between two ends of the groove are determined, for example, the groove feature detection may include:
the charging curve comprises a descending curve and an ascending curve, the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value, and the difference between the current before descending and the current after ascending is smaller than a second preset value.
Wherein, the first preset value can be 0.25-0.35A, and the second preset value can be 0.18-0.22A. The current difference between the lowest point after descending and the highest point after ascending or before descending is compared, so that the descending depth of the groove can be screened, and the matching degree of the height of the groove can be screened to meet the preset requirement by comparing the current before descending and the current after ascending.
The current before the drop may be the current at the time of starting the drop, or the current a predetermined period of time before the time point at which the current starts the drop. The current after the rise may be a current at the time of completion of the rise or a current at a predetermined time after the completion of the rise of the current.
In an embodiment of the present application, when detecting a groove included in a charging curve according to the groove characteristic, the method may further include:
the charging curve comprises a descending curve and an ascending curve, and the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value; and the current difference of the ascending section is larger than or equal to the preset proportional value of the current difference of the descending section.
The first preset value may be 0.25-0.35A, and the current difference of the rising section may be a difference between a current before rising and a current after rising. The current difference in the falling section may be a difference between a current before the falling and a current after the falling. The predetermined ratio may be greater than 40%, or greater than 50%, etc.
When the charging curve is determined to be an ascending curve or a descending curve, the current change of the charging curve can be determined by a median difference method. Comparing the current collected at the nth moment with the current collected at the (n + 1) th moment, the current at the nth moment can be subtracted from the current at the (n + 1) th moment, and the change trend of the current can be determined according to the subtraction result. If the obtained result is a positive value, the current is in a rising stage, and if the obtained result is a negative value, the current is in a falling stage.
In step S103, determining the type of the groove according to the detected current variation characteristic of the groove;
when it is detected that the charging curve includes a groove, the type of the detected groove needs to be further determined, and the corresponding current state may be different according to the specific type.
The grooves in the curve can be detected in sequence in the following detection mode until the grooves are detected to belong to one specific groove type.
The detection method comprises the following steps:
as shown in fig. 2, the flow of groove type detection may include:
in step S201, it is determined that the current change speed of the current falling segment is greater than a first speed threshold, the current change speed of the rising segment is less than a second speed threshold, and the current of the falling segment is greater than a third preset value:
when the current change speed of the current falling section is greater than the first speed threshold, the current can be understood as falling rapidly, and when the current change speed of the rising section is less than the second speed threshold, the current can be understood as rising slowly. Wherein the first speed threshold is greater than the second speed threshold. When the descending section and ascending section of the groove satisfy the above condition, that is, the condition of steep descending and gradual ascending is satisfied, the process proceeds to step S202 to perform judgment.
In step S202, if a difference between the current before the falling and the current after the rising is greater than or equal to a fourth preset value, the groove type corresponding to the charging curve is a plurality of charging device types;
if the difference between the current before the falling and the current after the rising is greater than or equal to a fourth preset value, for example, greater than or equal to 0.35-0.45A, it indicates that the current has not been effectively increased back, possibly due to the charging of a new rechargeable battery, and the current is increased due to a plurality of charging devices, so that no fault can be recorded for such a notch.
In step S203, if the difference between the current before falling minus the current after rising is less than a fourth preset value, the groove type is a fault type.
If the difference value of the current before the reduction minus the current after the increase is less than the fourth preset value, the current value is increased back possibly due to the water shortage of the lead-acid battery, and the type of the groove is determined to be a fault type.
And a second detection mode:
when the current change speeds of the current descending sections are all smaller than the second speed threshold value and the current change speed of the ascending section is larger than the first speed threshold value, the groove type corresponding to the charging curve is a plurality of charging equipment types.
When the current change speed of the current falling section is less than the second speed threshold, the current is understood to fall slowly, and when the current change speed of the rising section is greater than the first speed threshold, the current is understood to rise rapidly. Wherein the first speed threshold is greater than the second speed threshold. For such a slowly descending and steeply ascending groove, the steep ascending may be caused by the addition of the charging device, and thus it can be determined that the groove type corresponds to a plurality of charging device types.
And a third detection mode:
as shown in fig. 3, the process of determining the groove type may include:
in step S301, determining that the current change speeds of the current falling sections are all less than a second speed threshold;
if the current change speed of the current falling section of the groove is less than the second speed threshold, the current is indicated to slowly fall in the falling section.
In step S302, if the current change speed of the rising segment is less than the second speed threshold, and the time length between the time point corresponding to the end position of the current rising segment and the time point away from the end position of the current is greater than a predetermined time length, the groove type is a fault type;
if the speed of change of the current in the current rise section is also less than the second speed threshold, i.e. the current in the current rise section rises slowly, the time duration between the point in time at which the rise ends and the point in time at which the charging curve ends is further ascertained, if the time duration is less than a predetermined time duration, which may be the current rise due to the end of the charging operation, if more than the predetermined time duration, the type of recess is determined to be of the fault type.
In step S303, if the current change speed of the rising segment is less than the second speed threshold, and the current difference between the current before falling and the current after rising is less than the second preset value, the groove type is a fault type;
and if the current change speed of the current rising section is also smaller than a second speed threshold, namely the current in the current rising section slowly rises, further confirming the current difference between the current of the current after rising and the current before falling, and if the current difference is smaller than a second preset value, determining that the groove type is a fault type.
In step S304, if the current change speed of the ascending section is less than the second speed threshold, and the difference between the current after the ascending and the current before the descending is greater than the second preset value, the groove type is the multi-device type.
If the current change speed of the current rising section is also smaller than the second speed threshold, that is, the current in the current rising section slowly rises, it is further determined that the current before the current falls is smaller than the current after the current rises, and the difference is larger than the second preset value, it is indicated that the current is obviously increased, and the current may be increased due to a plurality of newly added devices.
And a detection mode is four:
when the current change speeds of the current descending sections are all smaller than a second speed threshold value, and the current change speed of the ascending section is smaller than the second speed threshold value, if the current difference obtained by subtracting the current before descending from the current after ascending is smaller than the second speed threshold value, the groove type corresponding to the charging curve is a plurality of charging device types.
If the current change speeds of the current descending sections are all smaller than the second speed threshold value, and the current change speed of the ascending section is smaller than the second speed threshold value, the current change types of the grooves are slow ascending and slow descending, and further the current change types of the grooves are determined to be slow ascending and slow descending
In step S104, when the type of the groove is a preset fault type, a prompt message that the lead-acid battery is out of water thermal runaway is generated.
And generating corresponding prompt information according to the detected groove type. When the groove type is a preset fault type, prompt information that the lead-acid battery is out of thermal runaway can be generated, so that a battery user, such as a vehicle owner, can find out the abnormality of the battery in time, maintain or replace the battery, the lead-acid battery is prevented from being out of thermal runaway due to leakage, and the use safety of the battery is improved.
When the groove type is the multi-device charging type, the groove type can be recorded or prompted, and abnormal prompting can be omitted.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Fig. 4 is a schematic structural diagram of a battery charging detection apparatus according to an embodiment of the present application, where the battery charging detection apparatus includes:
a charging curve obtaining unit 401, configured to obtain a charging curve corresponding to a lead-acid battery to be detected;
a groove detection unit 402 for detecting a groove in the charging curve according to a groove characteristic;
a groove type detection unit 403, configured to determine a type of the groove according to a current variation characteristic of the detected groove;
and the prompting unit 404 is configured to generate a prompt message that the lead-acid battery is in water shortage thermal runaway when the type of the groove is a preset fault type.
The battery charge detection apparatus shown in fig. 4 corresponds to the battery charge detection method shown in fig. 1.
Fig. 5 is a schematic diagram of a battery charge detection device according to an embodiment of the present application. As shown in fig. 5, the battery charge detection device 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52, such as a battery charge detection program, stored in said memory 51 and executable on said processor 50. The steps in the various battery charge detection method embodiments described above are implemented when the computer program 52 is executed by the processor 50. Alternatively, the processor 50 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 52.
Illustratively, the computer program 52 may be partitioned into one or more modules/units, which are stored in the memory 51 and executed by the processor 50 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 52 in the battery charge detection device 5. For example, the computer program 52 may be divided into:
the charging curve acquiring unit is used for acquiring a charging curve corresponding to the lead-acid battery to be detected;
the groove detection unit is used for detecting a groove in the charging curve according to the groove characteristics;
the groove type detection unit is used for determining the type of the groove according to the detected current change characteristics of the groove;
and the prompting unit is used for generating a prompting message that the lead-acid battery is in water shortage thermal runaway when the type of the groove is a preset fault type.
The battery charging detection device 5 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing device. The battery charge detection device may include, but is not limited to, a processor 50, a memory 51. It will be understood by those skilled in the art that fig. 5 is merely an example of the battery charge detection device 5, and does not constitute a limitation of the battery charge detection device 5, and may include more or less components than those shown, or combine some components, or different components, for example, the battery charge detection device may also include an input-output device, a network access device, a bus, etc.
The Processor 50 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the battery charge detection device 5, such as a hard disk or a memory of the battery charge detection device 5. The memory 51 may also be an external storage device of the battery charging detection apparatus 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, provided on the battery charging detection apparatus 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the battery charge detection device 5. The memory 51 is used to store the computer program and other programs and data required by the battery charge detection device. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A battery charge detection method, comprising:
acquiring a charging curve corresponding to a lead-acid battery to be detected;
detecting a groove in the charging curve according to a groove characteristic;
determining the type of the groove according to the detected current change characteristics of the groove;
and when the type of the groove is a preset fault type, generating a prompt message that the lead-acid battery is out of control due to water shortage.
2. The battery charge detection method of claim 1, wherein the step of detecting the notch in the charge curve according to the notch characteristic comprises:
the charging curve comprises a descending curve and an ascending curve, and the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value;
and the difference value between the current before descending and the current after ascending is smaller than a second preset value.
3. The battery charge detection method of claim 1, wherein the step of detecting the notch in the charge curve according to the notch characteristic comprises:
the charging curve comprises a descending curve and an ascending curve, and the current difference between the lowest point after descending and the highest point before descending or after ascending is larger than a first preset value;
and the current difference of the ascending section is larger than or equal to the preset proportional value of the current difference of the descending section.
4. The battery charge detection method of claim 1, wherein the step of determining the type of the groove based on the detected current variation characteristic of the groove comprises:
determining that the current change speed of the current descending section is greater than a first speed threshold, the current change speed of the ascending section is less than a second speed threshold, and the current of the descending section is greater than a third preset value:
if the difference value of the current before descending minus the current after ascending is larger than or equal to a fourth preset value, the groove type corresponding to the charging curve is a plurality of charging equipment types;
and if the difference value of the current before the falling minus the current after the rising is less than a fourth preset value, the groove type is a fault type.
5. The battery charge detection method of claim 1, wherein the step of determining the type of the groove based on the detected current variation characteristic of the groove comprises:
when the current change speeds of the current descending sections are all smaller than the second speed threshold value and the current change speed of the ascending section is larger than the first speed threshold value, the groove type corresponding to the charging curve is a plurality of charging equipment types.
6. The battery charge detection method of claim 1, wherein the step of determining the type of the groove based on the detected current variation characteristic of the groove comprises:
determining that the current change speeds of the current descending sections are all smaller than a second speed threshold;
if the current change speed of the ascending section is smaller than a second speed threshold value, and the time length between the time point corresponding to the end position of the current ascending section and the time point of the current end position is longer than a preset time length, the groove type is a fault type;
if the current change speed of the ascending section is smaller than a second speed threshold value, and the current difference between the current before descending and the current after ascending is smaller than a second preset value, the groove type is a fault type;
and if the current change speed of the ascending section is less than a second speed threshold value, and the difference value between the current after ascending and the current before descending is greater than a second preset value, the groove type is a multi-device type.
7. The battery charge detection method of claim 1, wherein prior to the step of detecting a notch in the charge curve based on notch characteristics, the method further comprises:
and determining whether the charging curve comprises a current oscillation signal or not according to the current change amplitude and the current change times.
8. A battery charge detection device, comprising:
the charging curve acquiring unit is used for acquiring a charging curve corresponding to the lead-acid battery to be detected;
the groove detection unit is used for detecting a groove in the charging curve according to the groove characteristics;
the groove type detection unit is used for determining the type of the groove according to the detected current change characteristics of the groove;
and the prompting unit is used for generating a prompting message that the lead-acid battery is in water shortage thermal runaway when the type of the groove is a preset fault type.
9. A battery charge detection apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the battery charge detection method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the battery charge detection method according to any one of claims 1 to 7.
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