CN117741454B - Method and system for screening and distinguishing charge and discharge faults of universal lithium battery - Google Patents
Method and system for screening and distinguishing charge and discharge faults of universal lithium battery Download PDFInfo
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- 238000007599 discharging Methods 0.000 claims abstract description 55
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- 238000009825 accumulation Methods 0.000 claims description 38
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- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The invention discloses a method and a system for screening and judging charge and discharge faults of a general lithium battery, wherein the method comprises the following steps: periodically collecting related signal quantity of a target battery in one or more complete charge and discharge processes; performing data calibration and data cleaning on the acquired related semaphore to obtain effective data; integrating charge and discharge electric quantity calculation of the target battery according to the effective data; according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out; and outputting a charging and discharging fault judging result of the target battery according to the comparison result. The method judges whether the station addresses have related hidden troubles of asymmetric charging and discharging by evaluating the difference of accumulated values of discharging and charging of the station addresses where the batteries are located. The method can improve the discrimination accuracy, reduce the misdiscrimination rate and has lower implementation cost.
Description
Technical Field
The invention relates to the technical field of storage battery quality evaluation, in particular to a method and a system for screening and judging charge and discharge faults of a general lithium battery.
Background
In recent years, with the massive network access of 5G equipment in the telecommunication industry, new demands and higher quality requirements are put forward on site power management in the aspects of site battery performance analysis, hidden trouble investigation, performance monitoring, equipment life-prolonging gain and the like.
The base station power supply system mainly comprises an alternating current power supply system and a direct current power supply system. The alternating current power supply system consists of one mains supply, one mobile oil engine power supply, a surge protector and an alternating current distribution box (with a mains oil engine conversion function). The direct current power supply system consists of a high-frequency switch combined power supply (comprising an alternating current power distribution unit, a monitoring module, a rectifying module and a direct current power distribution unit) and two groups (or one group) of storage battery groups.
The communication power supply system is a heart of the communication system, a stable and reliable communication power supply system is a key for ensuring safe and reliable operation of the communication system, and once the communication power supply system fails to cause interruption of power supply to the communication equipment, the communication equipment cannot operate, and the communication circuit is interrupted and the communication system breaks down, so that great economic and social benefit losses are caused. Therefore, the communication power supply system occupies a very important position in the communication system.
For the above-mentioned battery pack, the following problems exist in the prior art commonly found in the industry at present:
1. The batteries of different models, brands, manufacturers and protocol versions are different in type, different in signal quantity, different in data quality and different in reliability, so that a general evaluation method is not available.
2. For judging the charge and discharge faults of the storage battery, most common evaluation methods in the industry depend on the residual capacity of a single time point provided by battery manufacturers, but the calculation methods of the residual capacities of all the manufacturers are different, the numerical reliability is low, the error is large, misjudgment and missed judgment are easily caused, and the judgment quality and reliability are low.
3. The signal quantity of part brands and factories is private agreement, and the system has no unified standard interface, and if data are required to be collected, relevant interfaces are required to be purchased and application programs are required to be developed respectively, so that the construction period is long and the cost is high.
Therefore, screening of charging and discharging faults of storage batteries of different types and different types in a power supply system of a communication base station is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a method and a system for screening and distinguishing charge and discharge faults of a general type lithium battery, which can solve the problem of screening charge and discharge faults of storage batteries of different types and different types in a power supply system of a communication base station.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for screening and discriminating a charge and discharge fault of a general lithium battery, including the steps of:
Periodically collecting related signal quantity of a target battery in one or more complete charge and discharge processes;
Performing data calibration and data cleaning on the acquired related semaphore to obtain effective data;
integrating charge and discharge electric quantity calculation of the target battery according to the effective data;
according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out;
and outputting a charging and discharging fault judging result of the target battery according to the comparison result.
Further, periodically collecting relevant signal quantity of the target battery in one or more complete charge and discharge processes, including:
Splitting a target battery into a plurality of time intervals to be respectively collected in one or more complete charging and discharging processes, and superposing the collected interval data to obtain related signal quantity;
Wherein the related semaphore is performance data comprising: collecting time, each battery pack ID of the lithium battery, each battery pack current of the lithium battery, switching power supply current, switching power supply pack current 1, switching power supply pack current 2, residual capacity of each battery pack of the lithium battery and charging and discharging states.
Further, performing data calibration and data cleaning on the collected related signal quantity to obtain effective data, including:
Judging the acquired related signal quantity by adopting preset conditions, removing data which cannot be acquired, is not acquired or is unavailable in the acquisition of data, and cleaning invalid data to obtain valid data;
Wherein, the preset conditions are as follows:
a. the data are not empty in the discharging process, and at least comprise performance data of two time points;
b. The data are not empty in the charging process, and at least comprise performance data of two time points;
c. During the charge and discharge process, the acquired data of at least two time points meet one or more of the following conditions:
1) The battery current of at least one group of lithium batteries is not null and is not equal to 0;
2) The remaining capacity of the battery pack of at least one group of lithium batteries is not empty and is not equal to 0;
3) The switching power supply group current 1 and the switching power supply group current 2 are not empty and are not equal to 0.
Further, according to the effective data, integrating charge and discharge electricity quantity calculation of the target battery, including:
(1) Respectively acquiring 1 st performance data and last 1 performance data in a discharging process and a charging process, and respectively corresponding starting time and ending time;
(2) Judging whether all the battery pack currents of the lithium battery are empty or 0 according to the 1 st acquired data to the last 1 acquired data in the discharging process, if not, enabling all the battery pack currents of the lithium battery to be available, and carrying out charge and discharge electric quantity accumulation calculation by adopting a first group of formulas (2.1) and (2.2):
(2.1) an accumulated discharge electric quantity calculation formula:
the calculation formula of the accumulated discharge electric quantity of each group of batteries comprises the following steps:
The accumulated discharge electric quantity calculation formula of each group of battery discharge interval comprises the following steps:
Or (b)
The 1 st sigma is the accumulation of the battery capacity of each battery pack of the lithium battery; /(I)The 2 nd sigma is the accumulation of the capacity of each discharge section of each battery pack of the lithium battery;
(2.2) an accumulated charge quantity calculation formula:
The calculation formula of the accumulated charge quantity of each group of batteries comprises the following steps:
The accumulated charge quantity calculation formula of each group of battery discharge interval comprises the following steps:
Or (b)
The 1 st sigma is the accumulation of the battery capacity of each group; /(I)The 2 nd sigma is the accumulation of the capacity of each charging section of each group of batteries;
Wherein, BMS represents lithium battery pack; BMS group 1, BMS group 2, … … BMS group N represent each group battery ID of the lithium battery group; A section start current and a section end current representing the current of each battery pack of the lithium battery; Indicating the charge or discharge duration of each battery current of the lithium battery.
Further, according to the effective data, integrating charge and discharge electric quantity calculation of the target battery, and further comprising:
(3) If all the battery pack currents of the lithium battery are judged to be empty or all the battery pack currents of the lithium battery are judged to be 0, the battery pack currents of the lithium battery are not available; judging whether the residual capacity of each battery pack of the lithium battery is completely empty or completely 0 according to the 1 st acquired data to the last 1 acquired data in the discharging process; if not, the residual capacity of each battery pack of the lithium battery is available, and the charge and discharge electric quantity accumulation calculation is performed by adopting a second group of formulas (3.1) and (3.2):
(3.1) an accumulated discharge electric quantity calculation formula:
(3.2) an accumulated charge quantity calculation formula:
。
further, according to the effective data, integrating charge and discharge electric quantity calculation of the target battery, and further comprising:
(4) If the current of each battery pack of the lithium battery and the residual capacity of each battery pack of the lithium battery are invalid, using the switch power pack current 1 and the switch power pack current 2, and adopting a third group of formulas (4.1) and (4.2) to perform charge-discharge electric quantity accumulation calculation:
(4.1) an accumulated discharge electric quantity calculation formula:
the accumulated discharge electric quantity calculation formula of each switch power supply group comprises the following steps:
the accumulated discharge electric quantity calculation formula of each group of switch power supply group discharge interval comprises the following steps:
Or:
The 1 st sigma is the accumulation of the battery capacities of the switch power supply unit 1 and the switch power supply unit 2;
the 2 nd sigma is the accumulation of the capacity of each discharging interval of each switching power supply group;
(4.2) an accumulated charge quantity calculation formula:
the accumulated charge quantity calculation formula of each switch power supply group comprises the following steps:
The accumulated charge quantity calculation formula of each group of switch power supply group charging interval comprises the following steps:
Or:
The 1 st sigma is the accumulation of the battery capacities of the switch power supply group 1 and the switch power supply group 2;
Representing the 2 nd sigma as the accumulation of the capacity of each charging section of each switching power supply group;
a section start current and an end current representing a switching power supply group; /(I) Indicating the charge or discharge duration of each switching power supply group current.
Further, according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out; comprising the following steps:
Traversing each group of batteries of the target battery, and aggregating to calculate the ratio of the charge quantity to the discharge quantity of each group of batteries, wherein the formula is as follows:
Wherein,
1) Such asIs 0,/>If the charging/discharging ratio of the battery pack is not 0, the charging/discharging ratio of the battery pack is recorded as 0;
2) Such as Not 0,/>If the charge-discharge ratio of the battery pack is 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
3) Such as ，/>All are 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
4) Such as ，/>If any 1 is negative, the charge/discharge ratio of the battery pack is not calculated.
Further, according to the comparison result, outputting a charging and discharging fault judgment result of the target battery; comprising the following steps:
If the charge-discharge ratios of all the battery packs are 0 or cannot be calculated, outputting a judging result that the target battery has no hidden trouble;
If 1 group or more than 1 group of battery packs exist, the charging-discharging ratio is not equal to 0 and cannot be calculated, and a first judging condition is met, outputting a judging result that the target battery has no hidden trouble; the first determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, all battery packs meet the following conditions: 0.95< = charge-to-discharge ratio < = 1.1 or as calculated using switching power supply stack current 1 and switching power supply stack current 2, all battery stacks satisfy: 0.9< = charge-to-discharge ratio < = 1.1;
If the charging/discharging ratio of 1 group or more than 1 group of battery packs is not equal to 0 and cannot be calculated, and a second judging condition is met, outputting a judging result that hidden danger exists in each group of battery in the target battery; the second determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, any one battery pack satisfies the following conditions: charge-to-discharge ratio <0.95 or charge-to-discharge ratio >1.1; or all battery packs satisfy as calculated using switching power pack current 1 and switching power pack current 2: charge-to-discharge ratio <0.90 or charge-to-discharge ratio >1.1.
In a second aspect, an embodiment of the present invention further provides a system for screening and discriminating a charging and discharging fault of a general type lithium battery, including:
The acquisition module is used for periodically acquiring related signal quantity of the target battery in the complete process of one or more times of charging and discharging;
The data calibration and data cleaning module is used for carrying out data calibration and data cleaning on the collected related signal quantity to obtain effective data;
The integration calculation module is used for integrating the charge and discharge electric quantity calculation of the target battery according to the effective data; according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out;
And the judging and outputting module is used for outputting a judging result of the charge and discharge faults of the target battery according to the comparison result.
Compared with the prior art, the invention discloses a method for screening and judging the charge and discharge faults of a general lithium battery, and judges whether the station address has related hidden danger of asymmetric charge and discharge by evaluating the difference of discharge and charge accumulated values of the station address where the battery is located.
Different from the traditional method for judging the battery capacity, the calculation process of the invention adopts a differential method of collecting and calculating a plurality of intervals, firstly, the discharging and charging process is divided into a plurality of time intervals to be respectively collected, and then the collected interval data are overlapped, thereby reducing the influence of single-point collection errors, and adopting different calculation methods aiming at the difference of the actual signal quantity collection quality on site, and realizing the accurate calculation of the discharging and charging quantity. And respectively calculating the discharge and charge electric quantity values in the complete charge and discharge process by accumulating the performance data of the discharge section point by point, and comparing the discharge and charge electric quantity value with a standard range by the ratio of the discharge and charge electric quantity value, if the discharge and charge electric quantity value exceeds the standard range, judging that the potential hazard of the charge and discharge ratio abnormality of the battery exists, and the charge and discharge faults of the battery are suspected. The method can improve the discrimination accuracy, reduce the misdiscrimination rate and has lower implementation cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for screening and distinguishing charge and discharge faults of a general type storage battery.
Fig. 2 is a schematic diagram of a power supply system of a base station.
Fig. 3 is a block diagram of a system for screening and discriminating charge and discharge faults of a general type storage battery.
Fig. 4 is an implementation diagram of screening and distinguishing of charge and discharge faults of a general type storage battery.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a method for screening and judging charge and discharge faults of a general lithium battery, which is shown by referring to FIG. 1 and comprises the following steps of:
s1, periodically collecting related signal quantity of a target battery in one or more complete charge and discharge processes;
s2, carrying out data calibration and data cleaning on the collected related signal quantity to obtain effective data;
s3, integrating charge and discharge electric quantity calculation of the target battery according to the effective data;
S4, comparing the charge and discharge electric quantity of the battery according to the charge and discharge electric quantity calculation result of the target battery;
and S5, outputting a charge and discharge fault judgment result of the target battery according to the comparison result.
The method can be used for evaluating the charge and discharge faults of the storage batteries with a plurality of brands, models and lithium battery types in the same project. The method can be applied to the evaluation of whether the charge and discharge faults exist or not with qualitative requirements but without very accurate quantitative requirements. The project of batch storage battery evaluation can also be realized through low-cost equipment purchase and engineering. Based on the method, potential hazards of battery charge-discharge ratio abnormality and correction suggestions are obtained: for example, the maintenance department can be guided to identify the problem of the decrease of the efficiency of the battery system caused by the dissatisfaction of charging and the like caused by the asymmetric process in the charging and discharging of the station battery, and the efficiency and the standby reliability of the station power supply system can be improved after improvement.
The technical scheme of the invention is described in detail by a specific embodiment:
The main steps of the technical scheme of the invention comprise the steps of signal quantity acquisition and storage, signal quantity calibration, interval electric quantity calculation, battery integration charge and discharge electric quantity calculation, battery charge and discharge electric quantity comparison and fault judgment, and each step is described in detail below.
Firstly, creating a periodic acquisition task through methods of a data platform, introduction, equipment access and the like, and acquiring the following signal quantity of the battery in the complete process of one or more times of charging and discharging of the battery, wherein the acquisition frequency is 1 minute/time or is not lower than 5 minutes/time at the minimum.
The acquisition signal amount is as follows:
The connection schematic of the base station power supply system is shown in fig. 2, and the base station power supply system generally comprises a switch power supply 1 set, a plurality of lithium battery sets and a plurality of devices. The switching power supply is connected to a target battery, which is composed of a plurality of battery packs, which are combined together to supply the voltage and capacity required by the base station. The switching power supply divides the circuit into two parts, one part is used for supplying power to the base station main equipment, and the other part is used for supplying power to the base station transmission equipment.
In the discharging process of the battery, a plurality of battery packs are connected with a switching power supply, and then two groups of outputs (a switching power supply pack 1 and a switching power supply pack 2) of the switching power supply power for the base station equipment. When the scene is discharged, the commercial power is in an off state (only the battery is used for supplying power), so the sum of the currents output by the group 1 and the group 2 of the switching power suppliesShould be equal to the sum of the group currents of the battery groups/>However, in actual situations, because of the problems of line loss, instrument precision, protocol configuration errors and the like, the measurement error is usually larger, so the method adopts a strategy of collecting multiple groups of redundant semaphores (battery pack current, switching power supply current and residual capacity) and selecting the semaphore for calculation according to the actual situations.
The data collected in the first step, such as the performance data of the discharge segment at two time points, are as follows:
2023/12/21 17:50
battery a-battery pack 1: switching power supply current: -20.3, group current 1: -10.1, group current 2: -10.3, residual capacity 120.33, status: discharging;
Battery a-battery pack 2: switching power supply current: -20.3, group current 1: -10.1, group current 2: -10.3, remaining capacity without data, status: discharging;
Battery B-battery pack 1: switching power supply current: -20.3, group current 1: no data, group current 2: no data, no data in remaining capacity, status: discharging;
2023/12/22 10:55
Battery a-battery pack 1: switching power supply current: -22.3, group current 1: -11.1, group current 2: -11.3, residual capacity 110.4, status: charging;
battery a-battery pack 2: switching power supply current: -20.3, group current 1: -11.1, group current 2: -12.3, remaining capacity without data, status: charging;
battery B-battery pack 1: switching power supply current: -23.5, group current 1: no data, group current 2: no data, no data in remaining capacity, status: charging;
And secondly, performing pre-condition judgment on the acquired data, removing data which cannot be acquired, is not acquired enough, or is unavailable in the acquired data, cleaning invalid data, and ensuring that the valid data enter further calculation so as to reduce the probability of misjudgment. Specific judging conditions are as follows:
a. the discharge segment data is not empty and at least comprises two time point performance data;
b. the charging section data is not empty and at least comprises two time point performance data;
c. in the discharging section and the charging section, at least two time points satisfy the following 1 or more conditions:
1) The battery current of at least one group of lithium batteries is not null and is not equal to 0;
2) The remaining capacity of the battery pack of at least one group of lithium batteries is not empty and is not equal to 0;
3) The switching power supply group current 1 and the switching power supply group current 2 are not empty and are not equal to 0.
Thirdly, when the battery to be evaluated meets the conditions, the following rules are sequentially calculated:
(1) Firstly, segment information of a discharge segment is acquired, and the following performance data attributes are acquired:
a) The 1 st performance data point of the discharging process records the discharging starting time;
b) At last 1 performance data point in the discharging process, recording the discharging ending time;
c) The method comprises the steps that 1 st performance data point in the charging process is recorded, and charging starting time is recorded;
d) At last, 1 performance data point in the charging process, and recording the charging ending time;
(2) And judging whether all the currents of each battery pack of the lithium battery are empty or all the currents of each battery pack of the lithium battery are 0 in the data from the 1 st performance to the last 1 performance of the discharge section. If so, the BMS group current data is not available, and the step (3) is continued.
If not, the current of each battery pack of the lithium battery is available, the discharge accumulated electric quantity and the charge accumulated electric quantity value are calculated according to the following formulas respectively, and then the step (5) is continued.
The calculation formula adopts a first group of formulas (2.1) and (2.2) to carry out charge and discharge electric quantity accumulation calculation:
(2.1) an accumulated discharge electric quantity calculation formula:
the calculation formula of the accumulated discharge electric quantity of each group of batteries comprises the following steps:
The accumulated discharge electric quantity calculation formula of each group of battery discharge interval comprises the following steps:
Or (b)
The 1 st sigma is the accumulation of the battery capacity of each battery pack of the lithium battery; /(I)The 2 nd sigma is the accumulation of the capacity of each discharge section of each battery pack of the lithium battery;
(2.2) an accumulated charge quantity calculation formula:
The calculation formula of the accumulated charge quantity of each group of batteries comprises the following steps:
The accumulated charge quantity calculation formula of each group of battery discharge interval comprises the following steps:
Or (b)
The 1 st sigma is the accumulation of the battery capacity of each group; /(I)The 2 nd sigma is the accumulation of the capacity of each charging section of each group of batteries;
Wherein, BMS represents lithium battery pack; BMS group 1, BMS group 2, … … BMS group N represent each group battery ID of the lithium battery group; A section start current and a section end current representing the current of each battery pack of the lithium battery; Indicating the charge or discharge duration of each battery current of the lithium battery.
(3) And judging whether the residual capacity of each battery pack of the lithium battery is completely empty or completely 0 in the data from the 1 st performance to the last 1 performance of the discharge section. If so, the residual capacity of each battery pack of the lithium battery is not available, and the step (4) is continued.
If not, the residual capacity of each battery pack of the lithium battery is available, the discharge accumulated electric quantity and the charge accumulated electric quantity value are calculated according to the following formulas respectively, and then the step (5) is continued.
And (3) carrying out charge and discharge electric quantity accumulation calculation by adopting a second group of formulas (3.1) and (3.2):
(3.1) an accumulated discharge electric quantity calculation formula:
(3.2) an accumulated charge quantity calculation formula:
。
(4) If the current of each battery pack of the lithium battery and the residual capacity of each battery pack of the lithium battery are invalid, using the switch power pack current 1 and the switch power pack current 2, and adopting a third group of formulas (4.1) and (4.2) to perform charge-discharge electric quantity accumulation calculation:
(4.1) an accumulated discharge electric quantity calculation formula:
the accumulated discharge electric quantity calculation formula of each switch power supply group comprises the following steps:
the accumulated discharge electric quantity calculation formula of each group of switch power supply group discharge interval comprises the following steps:
Or:
The 1 st sigma is the accumulation of the battery capacities of the switch power supply unit 1 and the switch power supply unit 2;
the 2 nd sigma is the accumulation of the capacity of each discharging interval of each switching power supply group;
(4.2) an accumulated charge quantity calculation formula:
the accumulated charge quantity calculation formula of each switch power supply group comprises the following steps:
The accumulated charge quantity calculation formula of each group of switch power supply group charging interval comprises the following steps:
Or:
The 1 st sigma is the accumulation of the battery capacities of the switch power supply group 1 and the switch power supply group 2;
Representing the 2 nd sigma as the accumulation of the capacity of each charging section of each switching power supply group;
a section start current and an end current representing a switching power supply group; /(I) Indicating the charge or discharge duration of each switching power supply group current.
(5) Each interval and the battery pack are aggregated, and the charge and discharge electric quantity of the battery is calculated, and the ratio is:
Traversing each group of batteries, and aggregating to calculate the ratio of the charge quantity to the discharge quantity of each group of batteries, wherein the formula is as follows:
Wherein,
1) Such asIs 0,/>If the charging/discharging ratio of the battery pack is not 0, the charging/discharging ratio of the battery pack is recorded as 0;
2) Such as Not 0,/>If the charge-discharge ratio of the battery pack is 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
3) Such as ，/>All are 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
4) Such as ，/>If any 1 is negative, the charge/discharge ratio of the battery pack is not calculated.
Fourth, judging the comparison value, and outputting a judging result:
Outputting hidden danger judging results and details according to the step (5):
Fifth, the judgment result is output to a report or a database table:
compared with the current evaluation method in the industry, the method has the advantages of high accuracy, low cost and strong universality, and can solve the following problems:
1. The method solves the problems of low reliability, low accuracy and large error of the residual capacity and often causes misjudgment and missed judgment of the single signal quantity provided by a battery manufacturer.
2. The method solves the problem of charge and discharge fault judgment of unified standards and methods of storage batteries with various brands, various types and various protocols.
3. The method solves the problems of high cost and low benefit of purchasing a large amount of equipment and writing a large amount of codes for realizing battery performance evaluation.
Based on the same inventive concept, the invention provides a general type lithium battery charging and discharging fault screening and distinguishing system, which is shown by referring to fig. 3, and comprises:
The acquisition module is used for periodically acquiring related signal quantity of the target battery in the complete process of one or more times of charging and discharging;
The data calibration and data cleaning module is used for carrying out data calibration and data cleaning on the collected related signal quantity to obtain effective data;
The integration calculation module is used for integrating the charge and discharge electric quantity calculation of the target battery according to the effective data; according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out;
And the judging and outputting module is used for outputting a judging result of the charge and discharge faults of the target battery according to the comparison result.
In the implementation, referring to fig. 4, two subsystems, namely a battery data acquisition subsystem and a fault judging subsystem, are constructed.
In the battery data acquisition subsystem, a periodic acquisition task 1, a task 2 and a … … task N are created, and the signal quantity of the battery is acquired in the complete process of one or more times of charging and discharging of the battery for the heterogeneous storage battery 1, the heterogeneous storage battery 2 and the heterogeneous storage battery N … … respectively.
And then, in the fault judging subsystem, signal quantity calibration and data cleaning, interval charge and discharge electric quantity calculation and calibration are carried out, charge and discharge electric quantity calculation is integrated, battery charge and discharge electric quantity comparison is carried out, the judgment of the charge and discharge faults of the storage battery is completed, and finally, the fault judging result and related instructions can be output.
The system can screen faults of charging and discharging of storage batteries with different models and different types in the power supply system of the communication base station, can improve the discrimination accuracy, reduce the misdiscrimination rate, and has lower implementation cost.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The method for screening and distinguishing the charge and discharge faults of the universal lithium battery is characterized by comprising the following steps of:
step1: periodically collecting related signal quantity of a target battery in one or more complete charge and discharge processes; comprising the following steps:
Splitting a target battery into a plurality of time intervals to be respectively collected in one or more complete charging and discharging processes, and superposing the collected interval data to obtain related signal quantity;
Wherein the related semaphore is performance data comprising: collecting time, each battery pack ID of the lithium battery, each battery pack current of the lithium battery, switching power supply current, switching power supply pack current 1, switching power supply pack current 2, residual capacity of each battery pack of the lithium battery and charging and discharging states;
Step 2: performing data calibration and data cleaning on the acquired related semaphore to obtain effective data;
step 3: integrating charge and discharge electric quantity calculation of the target battery according to the effective data; comprising the following steps:
(1) Respectively acquiring 1 st performance data and last 1 performance data in a discharging process and a charging process, and respectively corresponding starting time and ending time;
(2) Judging whether all the battery pack currents of the lithium battery are empty or 0 according to the 1 st acquired data to the last 1 acquired data in the discharging process, if not, enabling all the battery pack currents of the lithium battery to be available, and carrying out charge and discharge electric quantity accumulation calculation by adopting a first group of formulas (2.1) and (2.2):
(2.1) an accumulated discharge electric quantity calculation formula:
QBMS accumulating discharge electric quantity ＝∑QBMS Group of 1 accumulating discharge electric quantity +∑QBMS Group of 2 accumulating discharge electric quantity +…∑QBMS Group of N accumulating discharge electric quantity
the calculation formula of the accumulated discharge electric quantity of each group of batteries comprises the following steps:
Sigma Q BMS accumulated discharge electric quantity of single battery ＝QBMS Assembled battery No 1 accumulated electric quantity of each discharge interval +QBMS Assembled battery No 2 accumulated electric quantity of each discharge interval +…+QBMS Last assembled battery 1 Individual discharges each group of battery discharge interval accumulated discharge electric quantity calculation formula:
QBMS accumulated electric quantity of assembled battery discharge interval ＝((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Or Q accumulating discharge electric quantity ＝∑[ Pouring 1]∑[ Pouring 2]((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Sigma [ Pouring 1] represents the accumulation of the battery capacity of each battery pack of the lithium battery; sigma [ Pouring 2] represents the accumulation of the capacity of each discharge section of each battery pack of the lithium battery;
(2.2) an accumulated charge quantity calculation formula:
QBMS accumulated charge quantity ＝∑QBMS Group of 1 accumulated charge quantity +∑QBMS Group of 2 accumulated charge quantity +…∑QBMS Group of N accumulated charge quantity
The calculation formula of the accumulated charge quantity of each group of batteries comprises the following steps:
∑QBMS accumulated charge quantity of single battery ＝QBMS Assembled battery No 1 Accumulated electric quantity of each charging interval +QBMS Assembled battery No 2 Accumulated electric quantity of each charging interval +…+QBMS Last assembled battery 1 Personal charging
The accumulated charge quantity calculation formula of each group of battery discharge interval comprises the following steps:
QBMS Accumulated electric quantity of battery charging section ＝((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Or Q accumulated charge quantity ＝∑[ Pouring a1]∑[ Pouring b1]((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Sigma [ Pouring a1] represents the 1 st Sigma as the accumulation of the battery capacity of each group; sigma [ Pouring b1] represents the accumulation of the capacity of each charging section of each battery in the 2 nd Sigma;
Wherein, BMS represents lithium battery pack; BMS group 1, BMS group 2, … … BMS group N represent each group battery ID of the lithium battery group; i BMS Section start 、IBMS End of interval represents a section starting current and a section ending current of each battery pack current of the lithium battery; t1 Duration of interval represents the charge or discharge duration of each battery current of the lithium battery;
step 4: according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out; comprising the following steps:
Traversing each group of batteries of the target battery, and aggregating to calculate the ratio of the charge quantity to the discharge quantity of each group of batteries, wherein the formula is as follows:
battery charge-discharge ratio=q Accumulated charge quantity of assembled battery /Q accumulated discharge electric quantity of assembled battery
Wherein, when Q Accumulated charge quantity of assembled battery is Q BMS accumulated charge quantity , Q accumulated discharge electric quantity of assembled battery is Q BMS accumulating discharge electric quantity ;
when Q Accumulated charge quantity of assembled battery is Q accumulated charge quantity , Q accumulated discharge electric quantity of assembled battery is Q accumulating discharge electric quantity ;
1) If Q Accumulated charge quantity of assembled battery is 0 and Q accumulated discharge electric quantity of assembled battery is not 0, the charge-discharge ratio of the battery pack is recorded as 0;
2) If Q Accumulated charge quantity of assembled battery is not 0 and Q accumulated discharge electric quantity of assembled battery is 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
3) If Q Accumulated charge quantity of assembled battery ,Q accumulated discharge electric quantity of assembled battery is 0, the charge-discharge ratio of the assembled battery is recorded as being unable to be calculated;
4) If any 1 of Q Accumulated charge quantity of assembled battery ,Q accumulated discharge electric quantity of assembled battery is negative, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
Step 5: according to the comparison result, outputting a charging and discharging fault judgment result of the target battery; comprising the following steps:
If the charge-discharge ratios of all the battery packs are 0 or cannot be calculated, outputting a judging result that the target battery has no hidden trouble;
If 1 group or more than 1 group of battery packs exist, the charging-discharging ratio is not equal to 0 and cannot be calculated, and a first judging condition is met, outputting a judging result that the target battery has no hidden trouble; the first determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, all battery packs meet the following conditions: 0.95< = charge-to-discharge ratio < = 1.1 or as calculated using switching power supply stack current 1 and switching power supply stack current 2, all battery stacks satisfy: 0.9< = charge-to-discharge ratio < = 1.1;
If the charging/discharging ratio of 1 group or more than 1 group of battery packs is not equal to 0 and cannot be calculated, and a second judging condition is met, outputting a judging result that hidden danger exists in each group of battery in the target battery; the second determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, any one battery pack satisfies the following conditions: charge-to-discharge ratio <0.95 or charge-to-discharge ratio >1.1; or all battery packs satisfy as calculated using switching power pack current 1 and switching power pack current 2: charge-to-discharge ratio <0.90 or charge-to-discharge ratio >1.1.
2. The method for screening and judging the charge and discharge faults of the universal lithium battery according to claim 1, wherein the method for carrying out data calibration and data cleaning on the collected related signal quantity to obtain effective data comprises the following steps:
Judging the acquired related signal quantity by adopting preset conditions, removing data which cannot be acquired, is not acquired or is unavailable in the acquisition of data, and cleaning invalid data to obtain valid data;
Wherein, the preset conditions are as follows:
a. the data are not empty in the discharging process, and at least comprise performance data of two time points;
b. The data are not empty in the charging process, and at least comprise performance data of two time points;
c. During the charge and discharge process, the acquired data of at least two time points meet one or more of the following conditions:
1) The battery current of at least one group of lithium batteries is not null and is not equal to 0;
2) The remaining capacity of the battery pack of at least one group of lithium batteries is not empty and is not equal to 0;
3) The switching power supply group current 1 and the switching power supply group current 2 are not empty and are not equal to 0.
3. The method for screening and judging charge and discharge faults of a general type lithium battery according to claim 1, wherein the method for integrating charge and discharge electric quantity calculation of the target battery according to the effective data is further comprising:
(3) If all the battery pack currents of the lithium battery are judged to be empty or all the battery pack currents of the lithium battery are judged to be 0, the battery pack currents of the lithium battery are not available; judging whether the residual capacity of each battery pack of the lithium battery is completely empty or completely 0 according to the 1 st acquired data to the last 1 acquired data in the discharging process; if not, the residual capacity of each battery pack of the lithium battery is available, and the charge and discharge electric quantity accumulation calculation is performed by adopting a second group of formulas (3.1) and (3.2):
(3.1) an accumulated discharge electric quantity calculation formula:
QBMS accumulating discharge electric quantity ＝∑QBMS Group of 1 Residual capacity +∑QBMS Group of 2 Residual capacity +…∑QBMS Group of N Residual capacity
QBMS single set of discharge residual capacity ＝Q discharge No 1 Residual capacity of each point -Q final discharge 1 Residual capacity of each point
(3.2) an accumulated charge quantity calculation formula:
QBMS accumulated charge quantity ＝∑QBMS Group of 1 Residual capacity +∑QBMS Group of 2 Residual capacity +…∑QBMS Group of N Residual capacity
QBMS Single group charge remaining capacity ＝∑Q Charging the first 1 Residual capacity of each point -Q Charging last 1 Residual capacity of each point 。
4. The method for screening and judging charge and discharge faults of a general lithium battery according to claim 3, wherein the method for integrating charge and discharge electric quantity calculation of the target battery according to the effective data further comprises:
(4) If the current of each battery pack of the lithium battery and the residual capacity of each battery pack of the lithium battery are invalid, using the switch power pack current 1 and the switch power pack current 2, and adopting a third group of formulas (4.1) and (4.2) to perform charge-discharge electric quantity accumulation calculation:
(4.1) an accumulated discharge electric quantity calculation formula:
Q accumulating discharge electric quantity ＝∑Q Switch power supply group 1 accumulating discharge electric quantity +∑Q Switch power supply group 2 accumulating discharge electric quantity
the accumulated discharge electric quantity calculation formula of each switch power supply group comprises the following steps:
∑Q Switch power supply group 1 Accumulated discharge electric quantity of battery ＝Q Switch power supply group 1 Battery No 1 accumulated electric quantity of each discharge interval +Q Switch power supply group 1 Battery No 2 accumulated electric quantity of each discharge interval +…+Q Switch power supply group 1 Battery last 1 Individual discharges
∑Q Switch power supply group 2 Accumulated discharge electric quantity of battery ＝Q Switch power supply group 2 Battery No 1 accumulated electric quantity of each discharge interval +Q Switch power supply group 2 Battery No 2 accumulated electric quantity of each discharge interval +…+Q Switch power supply group 2 Battery last 1 Individual discharges
the accumulated discharge electric quantity calculation formula of each group of switch power supply group discharge interval comprises the following steps:
Q Accumulated electric quantity of switch power pack battery discharge interval ＝((I Section start +I End of interval )/2)*T2 Duration of interval
or: q accumulating discharge electric quantity ＝∑[ Pouring 11]∑[ Pouring 22]((I Section start +I End of interval )/2)*T2 Duration of interval
Sigma [ Pouring 11] represents the accumulation of the battery capacities of the 1 st Sigma switching power supply unit 1 and the 2 th switching power supply unit;
sigma [ Pouring 22] represents the accumulation of the capacity of each discharge section of each switching power supply unit;
(4.2) an accumulated charge quantity calculation formula:
Q accumulated charge quantity ＝∑Q Switch power supply group 1 accumulated charge quantity +∑Q Switch power supply group 2 accumulated charge quantity
the accumulated charge quantity calculation formula of each switch power supply group comprises the following steps:
∑Q Switch power supply group 1 Accumulated charge quantity of battery ＝Q Switch power supply group 1 Battery No 1 Accumulated electric quantity of each charging interval +Q Switch power supply group 1 Battery No 2 Accumulated electric quantity of each charging interval +…+Q Switch power supply group 1 Battery last 1 Personal charging
∑Q Switch power supply group 2 Accumulated charge quantity of battery ＝Q Switch power supply group 2 Battery No 1 Accumulated electric quantity of each charging interval +Q Switch power supply group 2 Battery No 2 Accumulated electric quantity of each charging interval +…+Q Switch power supply group 2 Battery last 1 Personal charging
The accumulated charge quantity calculation formula of each group of switch power supply group charging interval comprises the following steps:
Q Accumulated electric quantity of battery charging section of switch power supply unit ＝((I Section start +I End of interval )/2)*T2 Duration of interval
Or: q accumulated charge quantity ＝∑[ Pouring a2]∑[ Pouring a2]((I Section start +I End of interval )/2)*T2 Duration of interval
Sigma [ Pouring a2] represents the accumulation of the battery capacities of the 1 st Sigma switch power supply unit 1 and the 2 nd switch power supply unit;
sigma [ Pouring b2] represents the accumulation of the capacity of each charging section of each switching power supply unit;
i Section start 、I End of interval denotes a section start current and end current of the switching power supply group; t2 Duration of interval represents the charge or discharge duration of each switching power supply group current.
5. A general type lithium battery charge and discharge fault screening and distinguishing system is characterized by comprising:
The acquisition module is used for periodically acquiring related signal quantity of the target battery in the complete process of one or more times of charging and discharging; the method specifically comprises the following steps: splitting a target battery into a plurality of time intervals to be respectively collected in one or more complete charging and discharging processes, and superposing the collected interval data to obtain related signal quantity; wherein the related semaphore is performance data comprising: collecting time, each battery pack ID of the lithium battery, each battery pack current of the lithium battery, switching power supply current, switching power supply pack current 1, switching power supply pack current 2, residual capacity of each battery pack of the lithium battery and charging and discharging states;
The data calibration and data cleaning module is used for carrying out data calibration and data cleaning on the collected related signal quantity to obtain effective data;
the integration calculation module is used for integrating the charge and discharge electric quantity calculation of the target battery according to the effective data; according to the charge and discharge electric quantity calculation result of the target battery, battery charge and discharge electric quantity comparison is carried out; the method specifically comprises the following steps:
(1) Respectively acquiring 1 st performance data and last 1 performance data in a discharging process and a charging process, and respectively corresponding starting time and ending time;
(2) Judging whether all the battery pack currents of the lithium battery are empty or 0 according to the 1 st acquired data to the last 1 acquired data in the discharging process, if not, enabling all the battery pack currents of the lithium battery to be available, and carrying out charge and discharge electric quantity accumulation calculation by adopting a first group of formulas (2.1) and (2.2):
(2.1) an accumulated discharge electric quantity calculation formula:
QBMS accumulating discharge electric quantity ＝∑QBMS Group of 1 accumulating discharge electric quantity +∑QBMS Group of 2 accumulating discharge electric quantity +…∑QBMS Group of N accumulating discharge electric quantity
the calculation formula of the accumulated discharge electric quantity of each group of batteries comprises the following steps:
∑QBMS accumulated discharge electric quantity of single battery ＝QBMS Assembled battery No 1 accumulated electric quantity of each discharge interval +QBMS Assembled battery No 2 accumulated electric quantity of each discharge interval +…+QBMS Last assembled battery 1 Individual discharges
The accumulated discharge electric quantity calculation formula of each group of battery discharge interval comprises the following steps:
QBMS accumulated electric quantity of assembled battery discharge interval ＝((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Or Q accumulating discharge electric quantity ＝∑[ Pouring 1]∑[ Pouring 2]((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Sigma [ note 1] represents the 1 st Sigma is the accumulation of the battery capacity of each battery pack of the lithium battery; sigma [ Pouring 2] represents the accumulation of the capacity of each discharge section of each battery pack of the lithium battery;
(2.2) an accumulated charge quantity calculation formula:
QBMS accumulated charge quantity ＝∑QBMS Group of 1 accumulated charge quantity +∑QBMS Group of 2 accumulated charge quantity +…∑QBMS Group of N accumulated charge quantity
The calculation formula of the accumulated charge quantity of each group of batteries comprises the following steps:
∑QBMS accumulated charge quantity of single battery ＝QBMS Assembled battery No 1 Accumulated electric quantity of each charging interval +QBMS Assembled battery No 2 Accumulated electric quantity of each charging interval +…+QBMS Last assembled battery 1 Personal charging
The accumulated charge quantity calculation formula of each group of battery discharge interval comprises the following steps:
QBMS Accumulated electric quantity of battery charging section ＝((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Or Q accumulated charge quantity ＝∑[ Pouring a1]∑[ Pouring b1]((IBMS Section start +IBMS End of interval )/2)*T1 Duration of interval
Sigma [ Pouring a1] represents the 1 st Sigma as the accumulation of the battery capacity of each group; sigma [ Pouring b1] represents the accumulation of the capacity of each charging section of each battery in the 2 nd Sigma;
Wherein, BMS represents lithium battery pack; BMS group 1, BMS group 2, … … BMS group N represent each group battery ID of the lithium battery group; i BMS Section start 、IBMS End of interval represents a section starting current and a section ending current of each battery pack current of the lithium battery; t1 Duration of interval represents the charge or discharge duration of each battery current of the lithium battery;
Traversing each group of batteries of the target battery, and aggregating to calculate the ratio of the charge quantity to the discharge quantity of each group of batteries, wherein the formula is as follows:
battery charge-discharge ratio=q Accumulated charge quantity of assembled battery /Q accumulated discharge electric quantity of assembled battery
Wherein, when Q Accumulated charge quantity of assembled battery is Q BMS accumulated charge quantity , Q accumulated discharge electric quantity of assembled battery is Q BMS accumulating discharge electric quantity ;
when Q Accumulated charge quantity of assembled battery is Q accumulated charge quantity , Q accumulated discharge electric quantity of assembled battery is Q accumulating discharge electric quantity ;
1) If Q Accumulated charge quantity of assembled battery is 0 and Q accumulated discharge electric quantity of assembled battery is not 0, the charge-discharge ratio of the battery pack is recorded as 0;
2) If Q Accumulated charge quantity of assembled battery is not 0 and Q accumulated discharge electric quantity of assembled battery is 0, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
3) If Q Accumulated charge quantity of assembled battery ,Q accumulated discharge electric quantity of assembled battery is 0, the charge-discharge ratio of the assembled battery is recorded as being unable to be calculated;
4) If any 1 of Q Accumulated charge quantity of assembled battery ,Q accumulated discharge electric quantity of assembled battery is negative, the charge-discharge ratio of the battery pack is recorded as being unable to be calculated;
The judging and outputting module is used for outputting a judging result of the charge and discharge faults of the target battery according to the comparison result; the method specifically comprises the following steps: if the charge-discharge ratios of all the battery packs are 0 or cannot be calculated, outputting a judging result that the target battery has no hidden trouble;
If 1 group or more than 1 group of battery packs exist, the charging-discharging ratio is not equal to 0 and cannot be calculated, and a first judging condition is met, outputting a judging result that the target battery has no hidden trouble; the first determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, all battery packs meet the following conditions: 0.95< = charge-to-discharge ratio < = 1.1 or as calculated using switching power supply stack current 1 and switching power supply stack current 2, all battery stacks satisfy: 0.9< = charge-to-discharge ratio < = 1.1;
If the charging/discharging ratio of 1 group or more than 1 group of battery packs is not equal to 0 and cannot be calculated, and a second judging condition is met, outputting a judging result that hidden danger exists in each group of battery in the target battery; the second determination condition includes: when the current of each battery pack of the lithium battery or the residual capacity of each battery pack of the lithium battery is used for calculation, any one battery pack satisfies the following conditions: charge-to-discharge ratio <0.95 or charge-to-discharge ratio >1.1; or all battery packs satisfy as calculated using switching power pack current 1 and switching power pack current 2: charge-to-discharge ratio <0.90 or charge-to-discharge ratio >1.1.
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| JP2015226378A (en) * | 2014-05-28 | 2015-12-14 | パナソニック環境エンジニアリング株式会社 | Independent power supply device |
| CN105629172A (en) * | 2014-10-27 | 2016-06-01 | ***通信集团甘肃有限公司 | Fault detection method and fault detection device for hybrid battery |
| CN111025168A (en) * | 2019-11-29 | 2020-04-17 | 淮南师范学院 | Battery health state monitoring device and battery state of charge intelligent estimation method |
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