CN106707183A - Method and device for discharge test of storage battery - Google Patents

Abstract

The present invention discloses a method and a device for the discharge test of a storage battery. The method comprises the steps of determining discharge parameters for the discharge test of a storage battery; according to the discharge parameters, conducting the discharge test on the storage battery; acquiring the discharge curve of the storage battery during the process of the discharge test; searching a template curve matched with the discharge curve of the storage battery during the process of the discharge test and determining the operation state of the storage battery according to the matched template curve. According to the technical scheme of the invention, the technical problem in the prior art that the discharge test on storage batteries lasts for a long period of time can be solved.

Description

Storage battery discharge test method and device

technical field

The invention relates to the field of testing, in particular to a storage battery discharge testing method and device.

Background technique

The storage battery is an important part of the DC power supply of the substation. It is widely used as a backup power supply in the substation, and its reliability directly affects the safe operation of the power grid. Substation operation and maintenance personnel often check the capacity and operating status of the battery pack through checking discharge experiments to prevent the capacity of the battery pack from being unable to operate normally with load when the AC fault occurs in the substation.

Check discharge is a common method to test the operation status of the battery pack and judge the capacity of the battery pack. This method can effectively find the problems of the battery pack. However, the standard checking discharge takes a long time, and the relative workload is huge when there are few maintenance personnel and many maintenance sites.

At present, the maintenance and capacity judgment of the storage battery are realized through checking discharge. The check discharge test can accurately estimate the actual capacity of the battery, but it has the following defects: (1) The standard check discharge test uses a discharge current of 0.1C, and the discharge time is generally 10h. Charge. The checking discharge time is longer, and the cost of manpower and material resources is higher. (2) When there is only one set of battery packs for station use, there is a certain risk in checking discharge. For safety reasons, a backup battery pack is required, and the operation is complicated. (3) Special discharge equipment is required. (4) The state of the battery cannot be predicted.

Aiming at the technical problem in the prior art that it takes a long time to perform a discharge test on the storage battery, no effective solution has been proposed yet.

Contents of the invention

Embodiments of the present invention provide a storage battery discharge test method and device to at least solve the technical problem in the prior art that it takes a long time to perform a discharge test on a storage battery.

According to an aspect of an embodiment of the present invention, a battery discharge test method is provided, including: determining the discharge parameters for the battery discharge test; performing a discharge test on the battery according to the discharge parameters; obtaining the discharge curve of the battery during the discharge test; Searching for a template curve matching the discharge curve of the battery during the discharge test and determining the operating state of the battery according to the matched template curve.

Further, determining the discharge parameters for performing a discharge test on the storage battery includes: determining the rated capacity of the storage battery; determining the discharge current of the storage battery according to the rated capacity; and determining the maximum discharge time for discharging the storage battery.

Further, obtaining the discharge curve of the battery during the discharge test includes: collecting the real-time voltage and real-time current of the battery during the discharge test according to a preset time interval; updating the real-time voltage curve of the battery during the discharge test according to the real-time voltage; Real-time current updates the real-time current curve of the battery during the discharge test.

Further, searching for a template curve matching the discharge curve of the battery during the discharge test includes: determining the discharge parameter type corresponding to the discharge curve; searching for one or more template curves corresponding to the discharge parameter type in the preset curve template library; Compare the found one or more template curves with the discharge curve to determine the coincidence rate between the discharge curve and each template curve found; determine the template curve that matches the discharge curve of the battery during the discharge test according to the coincidence rate .

Further, determining the running state of the battery according to the matched template curve includes: determining the running state corresponding to the matched template curve, wherein each template curve stored in the preset curve template library corresponds to a unique running state; The deviation rate between the discharge curve and the matched template curve during the discharge test; determine the operating state of the battery according to the deviation rate and the corresponding operating state of the matched template curve.

According to another aspect of the embodiment of the present invention, there is also provided a storage battery discharge test device, including: a determining unit, used to determine the discharge parameters for performing a discharge test on the storage battery; a test unit, used to perform a discharge test on the storage battery according to the discharge parameters The acquiring unit is used to acquire the discharge curve of the battery during the discharge test; the search unit is used to find a template curve matching the discharge curve of the battery during the discharge test and determine the operating state of the battery according to the matched template curve.

Further, the determination unit includes: a first determination module, configured to determine the rated capacity of the storage battery; a second determination module, configured to determine the discharge current of the storage battery according to the rated capacity; a third determination module, configured to determine the maximum discharge current for the storage battery duration.

Further, the acquisition unit includes: an acquisition module, configured to acquire the real-time voltage and current of the storage battery during the discharge test at preset time intervals; a first update module, configured to update the real-time voltage and current of the storage battery during the discharge test according to the real-time voltage. Voltage curve; the second update module is used to update the real-time current curve of the storage battery during the discharge test according to the real-time current.

Further, the search unit includes: a fourth determination module, configured to determine the discharge parameter type corresponding to the discharge curve; a search module, configured to search for one or more template curves corresponding to the discharge parameter type in the preset curve template library; A module for comparing one or more template curves found with the discharge curve to determine the coincidence rate between the discharge curve and each template curve found; The discharge curve matches the template curve during the discharge test.

Further, the fifth determining module includes: a first determining submodule, configured to determine the running state corresponding to the matched template curve, wherein each template curve stored in the preset curve template library corresponds to a unique running state; The second determination sub-module is used to determine the deviation rate between the discharge curve of the battery during the discharge test and the matched template curve; the third determination sub-module is used to determine the battery according to the deviation rate and the corresponding operating state of the matched template curve operating status.

In the embodiment of the present invention, by determining the discharge parameters for the discharge test of the storage battery; carrying out the discharge test of the storage battery according to the discharge parameters; obtaining the discharge curve of the storage battery during the discharge test; The template curve of the battery is used to determine the operating state of the battery according to the matched template curve, which solves the technical problem of a long time for the battery discharge test in the prior art, and further achieves the technical effect of shortening the time for the battery discharge test.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a flow chart of an optional storage battery discharge test method according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of an optional storage battery discharge test device according to an embodiment of the present invention.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed Those steps or elements may instead include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

According to an embodiment of the present application, an embodiment of a battery discharge testing method is provided.

Fig. 1 is a flow chart of an optional storage battery discharge test method according to an embodiment of the present invention. As shown in Fig. 1, the method includes the following steps:

Step S101, determining discharge parameters for performing a discharge test on the storage battery;

Step S102, performing a discharge test on the storage battery according to the discharge parameters;

Step S103, obtaining the discharge curve of the storage battery during the discharge test;

Step S104, searching for a template curve matching the discharge curve of the battery during the discharge test and determining the operating state of the battery according to the matched template curve.

The above steps are further explained as follows:

The discharge test is a test method for discharging the battery to test the performance of the battery. The discharge parameters are the test parameters set during the discharge test of the battery, for example, the current magnitude when the battery is discharged, the duration of the discharge, etc.

After determining the discharge parameters for performing the discharge test on the storage battery, perform the discharge test on the storage battery according to the discharge parameters. Specifically, the discharge test device of the storage battery may be set, or the discharge parameter may also be set as the determined discharge parameter according to a specific discharge test method. For example, if the discharge current of the battery is set to be 0.1 times the capacity, then calculate the discharge current value that needs to be set according to the capacity of the battery, and then determine the size of the load connected to the battery according to the discharge current value.

After the battery is subjected to a discharge test according to the discharge parameters, a discharge curve of the battery during the discharge test is obtained. The discharge curve can be a curve that collects various electrical parameters of the battery during the discharge process. For example, the current value of the battery during the discharge process is collected according to the preset sampling time interval, and the relationship between the current and time is drawn after recording, and the battery is obtained during the discharge test. The discharge current curve in the process.

After the discharge curve of the storage battery during the discharge test is acquired, a template curve matching the discharge curve of the storage battery during the discharge test is searched for, and the operating state of the storage battery is determined according to the matched template curve. The template curve is a template for a curve used as a reference standard. For example, the template curve may include a discharge curve during a normal discharge process of the storage battery, a discharge curve during an open-circuit discharge process of the storage battery, and the like. The template curve may be a checking discharge test performed between discharge tests, and the battery determined to be normal is discharged, and the discharge curve during the checking discharge test is recorded as a template curve. After the discharge test is performed, one or more template curves are searched for a template curve that matches the discharge curve during the discharge test, so as to determine the current operating state of the battery according to the operating state corresponding to the template curve.

By comparing the discharge curve in the discharge test process with the template curve, it is possible to express the discharge trend of the battery according to the discharge curve in a short period of time without discharging all the power of the battery, so as to achieve the effect of determining the operating state of the battery.

In the embodiment of the present invention, by determining the discharge parameters for the discharge test of the storage battery; carrying out the discharge test of the storage battery according to the discharge parameters; obtaining the discharge curve of the storage battery during the discharge test; The template curve of the battery is used to determine the operating state of the battery according to the matched template curve, which solves the technical problem of a long time for the battery discharge test in the prior art, and further achieves the technical effect of shortening the time for the battery discharge test.

Preferably, determining the discharge parameters for performing a discharge test on the storage battery includes: determining the rated capacity of the storage battery; determining the discharge current of the storage battery according to the rated capacity; and determining the maximum discharge time for discharging the storage battery.

The rated capacity C of the battery is the battery capacity of the battery. When determining the discharge current in the discharge parameters, the discharge current of the battery can be determined according to the rated capacity. Since the capacity of the battery will decrease after a period of use, it needs to be based on the current rated capacity of the battery. To determine the discharge current value, for example, 0.1 times the rated capacity can be determined as the specific parameter value of the discharge current. Determining the discharge parameters of the discharge test also needs to test the maximum discharge duration.

Preferably, obtaining the discharge curve of the battery during the discharge test includes: collecting the real-time voltage and real-time current of the battery during the discharge test according to a preset time interval; updating the real-time voltage curve of the battery during the discharge test according to the real-time voltage; Real-time current updates the real-time current curve of the battery during the discharge test.

Drawing the discharge curve may be drawing a real-time voltage curve and a real-time current curve. The real-time voltage and real-time current during the discharge test are collected according to the preset time interval, and the discharge curve of the storage battery is updated in real time every time a real-time voltage value and real-time current value are collected.

When determining the matching template, it can be determined whether the discharge curve matches the template curve according to whether the coincidence rate exceeds a preset value. Specifically, searching for a template curve matching the discharge curve of the storage battery during the discharge test may include: determining the discharge parameter type corresponding to the discharge curve; searching for one or more template curves corresponding to the discharge parameter type in the preset curve template library ;Compare one or more template curves found with the discharge curve to determine the coincidence rate of the discharge curve with each template curve found; determine the template that matches the discharge curve of the battery during the discharge test according to the coincidence rate curve.

Optionally, the operating state of the storage battery can also be considered comprehensively in combination with the deviation rate between the discharge curve and the matching template curve, and it can be determined according to the difference between the discharge curve and the template curve that the operating state of the battery corresponds to the matching template curve The gap between the operating status. Specifically, each template curve stored in the preset curve template library corresponds to a unique operating state, and the operating state corresponding to the template curve matching the discharge curve is determined; The deviation rate between the template curves; the operating state of the storage battery is determined according to the deviation rate and the corresponding operating state of the matched template curves.

It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in the terminal, and although the logical order is shown in the flow chart, in some cases, the steps can be executed in a different order than here steps shown or described.

According to an embodiment of the present application, an embodiment of a storage battery discharge testing device is provided.

FIG. 2 is a schematic diagram of an optional battery discharge testing device according to an embodiment of the present invention. As shown in FIG. 2 , the device includes a determining unit 10 , a testing unit 20 , an acquiring unit 30 and a searching unit 40 .

The determination unit is used to determine the discharge parameters for the discharge test of the storage battery; the test unit is used to perform the discharge test on the storage battery according to the discharge parameters; the acquisition unit is used to obtain the discharge curve of the storage battery during the discharge test; the search unit is used for Searching for a template curve matching the discharge curve of the battery during the discharge test and determining the operating state of the battery according to the matched template curve.

Preferably, the determination unit includes: a first determination module, configured to determine the rated capacity of the storage battery; a second determination module, configured to determine the discharge current of the storage battery according to the rated capacity; a third determination module, configured to determine the maximum discharge of the storage battery duration.

Preferably, the acquisition unit includes: an acquisition module, configured to acquire the real-time voltage and current of the storage battery during the discharge test at preset time intervals; a first update module, configured to update the real-time voltage and current of the storage battery during the discharge test according to the real-time voltage. Voltage curve; the second update module is used to update the real-time current curve of the storage battery during the discharge test according to the real-time current.

Preferably, the search unit includes: a fourth determination module, configured to determine the discharge parameter type corresponding to the discharge curve; a search module, used to search for one or more template curves corresponding to the discharge parameter type in the preset curve template library; A module for comparing one or more template curves found with the discharge curve to determine the coincidence rate between the discharge curve and each template curve found; The discharge curve matches the template curve during the discharge test.

Preferably, the fifth determining module includes: a first determining submodule, configured to determine the operating state corresponding to the matched template curve, wherein each template curve stored in the preset curve template library corresponds to a unique operating state; The second determination sub-module is used to determine the deviation rate between the discharge curve of the battery during the discharge test and the matched template curve; the third determination sub-module is used to determine the battery according to the deviation rate and the corresponding operating state of the matched template curve operating status.

The above-mentioned apparatus may include a processor and a memory, and the above-mentioned units may be stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

Memory may include non-permanent memory in computer-readable media, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one memory chip.

The ordering manner of the above-mentioned embodiments of the present application is for description only, and does not represent the advantages or disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of the units may be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for enabling a computer device (which may be a personal computer, server or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .

The above description is only the preferred embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. These improvements and modifications are also It should be regarded as the protection scope of this application.

Claims (10)

1. a kind of battery discharging method of testing, it is characterised in that including：

It is determined that carrying out the discharge parameter of discharge test to battery；

The discharge test is carried out to the battery according to the discharge parameter；

Obtain discharge curve of the battery during the discharge test；

Search template curve and described of basis that the discharge curve with the battery during the discharge test is matched The template curve matched somebody with somebody determines the running status of the battery.

2. method according to claim 1, it is characterised in that it is determined that carrying out the discharge parameter bag of discharge test to battery Include：

Determine the rated capacity of the battery；

The discharge current of the battery is determined according to the rated capacity；

It is determined that to the maximum electric discharge duration of the battery discharging.

3. method according to claim 1, it is characterised in that obtain the battery during the discharge test Discharge curve includes：

Real-time voltage and real-time current of the battery during the discharge test are gathered according to prefixed time interval；

Real-time voltage curve of the battery during the discharge test is updated according to the real-time voltage；

Real-time current curve of the battery during the discharge test is updated according to the real-time current.

4. method according to claim 1, it is characterised in that search with the battery during the discharge test Discharge curve matching template curve include：

Determine the corresponding discharge parameter type of the discharge curve；

One or more template curves corresponding with the discharge parameter type are searched in pre-programmed curve ATL；

The one or more of template curves that will be found respectively are contrasted to determine the electric discharge with the discharge curve The coincidence factor of curve and each template curve for finding；

Determine that the template that the discharge curve with the battery during the discharge test is matched is bent according to the coincidence factor Line.

5. method according to claim 4, it is characterised in that the template curve according to the matching determines the battery Running status include：

Determine the corresponding running status of template curve of the matching, wherein, what is stored in the pre-programmed curve ATL is every Individual template curve corresponds to unique running status；

Determine inclined between discharge curve of the battery during the discharge test and the template curve for matching From rate；

The corresponding running status of template curve according to the bias ratio and the matching determines the running status of the battery.

6. a kind of battery discharging test device, it is characterised in that including：

Determining unit, the discharge parameter for determining to carry out battery discharge test；

Test cell, for carrying out the discharge test to the battery according to the discharge parameter；

Acquiring unit, for obtaining discharge curve of the battery during the discharge test；

Searching unit, for searching the template curve that the discharge curve with the battery during the discharge test is matched And the running status of the battery is determined according to the template curve of the matching.

7. device according to claim 6, it is characterised in that the determining unit includes：

First determining module, the rated capacity for determining the battery；

Second determining module, the discharge current for determining the battery according to the rated capacity；

3rd determining module, for determining the maximum electric discharge duration to the battery discharging.

8. device according to claim 6, it is characterised in that the acquiring unit includes：

Acquisition module, for gathering real-time voltage of the battery during the discharge test according to prefixed time interval And real-time current；

First update module, it is real-time during the discharge test for updating the battery according to the real-time voltage Voltage curve；

Second update module, it is real-time during the discharge test for updating the battery according to the real-time current Current curve.

9. device according to claim 6, it is characterised in that the searching unit includes：

4th determining module, for determining the corresponding discharge parameter type of the discharge curve；

Searching modul, for searching one or more templates corresponding with the discharge parameter type in pre-programmed curve ATL Curve；

Contrast module, one or more of template curves and the discharge curve for will find respectively contrasted with Determine the coincidence factor of the discharge curve and each template curve for finding；

5th determining module, for determining the electric discharge with the battery during the discharge test according to the coincidence factor The template curve of Curve Matching.

10. device according to claim 9, it is characterised in that the 5th determining module includes：

First determination sub-module, the corresponding running status of template curve for determining the matching, wherein, in the default song Each template curve stored in line template storehouse corresponds to unique running status；

Second determination sub-module, for determining that discharge curve of the battery during the discharge test is matched with described Template curve between bias ratio；

3rd determination sub-module, institute is determined for the corresponding running status of template curve according to the bias ratio and the matching State the running status of battery.