A method and device for collecting internal resistance of a battery pack in a base station

Abstract

The present application provides a method and device for collecting the internal resistance of a battery pack in a base station, which relates to the technical field of battery internal resistance collection. It can realize the automatic collection of the internal resistance of the battery pack, save human resources, and at the same time ensure that the monitoring data of the battery equipment in the base station is not interrupted, and maintain the safe operation of the equipment in the base station room. The method is applied to the power environment monitoring system, and only one battery is subject to a safety audit in each safety period of the test cycle; if the single battery fails the safety audit, it is judged again in the next safety period; if it passes the safety audit and the communication channel used to collect the battery monitoring data is idle, the first indication information for instructing the battery to perform discharge is sent to the single battery through the communication channel; after the idle state of the communication channel ends, the monitoring data for calculating the internal resistance of the battery is obtained through the communication channel. The above scheme is continuously implemented for each single battery until the battery pack is discharged.

Description

Technical Field

[0001] The present application relates to the technical field of battery internal resistance acquisition, and in particular to a method and device for acquiring the internal resistance of a battery pack in a base station. Background Art

[0002] In modern communication networks, base stations are important nodes for information transmission, and their stability and reliability are crucial. The battery pack in the base station serves as a backup power source for smart devices, providing power support when the mains fails. The performance of the battery pack directly affects the reliability and stability of the base station, so the monitoring and management of its internal resistance is particularly important.

[0003] The internal resistance value of the battery pack is not real-time, and the internal resistance value can only be calculated after the battery is discharged. At present, during the fixed test period of the internal resistance of the battery pack in the base station, the maintenance personnel usually operate the battery pack to discharge once, so as to collect data and calculate the internal resistance value. The specific process includes: recording the base station status before discharge, executing the battery pack discharge operation, observing the battery pack discharge status, waiting for the discharge to complete and observe whether the base station returns to normal, recording the battery pack discharge operation log, and collecting battery pack data to calculate the internal resistance value.

[0004] However, the method of manually discharging the battery pack to collect internal resistance is not only inefficient, but also requires a lot of manpower due to the large number of base stations. In addition, the battery discharge process involves high current and high voltage. If the operation is improper, it may cause serious safety accidents such as battery overheating, short circuit or even explosion, which seriously threatens the safety of maintenance personnel. Summary of the invention

[0005] The present application provides a method and device for collecting the internal resistance of a battery pack in a base station, which can realize automatic collection of the internal resistance of the battery pack, save human resources, and at the same time ensure that the monitoring data of the battery equipment in the base station is not interrupted, thereby maintaining the safe operation of the equipment in the base station room.

[0006] In a first aspect, a method for collecting internal resistance of a battery pack in a base station is provided, which is applied to a power environment monitoring system, comprising:

[0007] During the safety period of the test cycle, determine whether the single battery to be discharged has passed the safety review. The single battery is the basic unit of the battery pack. The safety period is the period outside the peak communication period.

[0008] If a single battery fails the safety audit, determine again whether the single battery passes the safety audit during the next safety period;

[0009] If the single storage battery passes the safety audit and the communication channel for collecting battery monitoring data is in an idle state, first indication information is sent to the single storage battery through the communication channel, and the first indication information is used to instruct the single storage battery to perform discharge;

[0010] After the idle state of the communication channel ends, the monitoring data of the single battery is obtained through the communication channel, the monitoring data including the discharge data, and the discharge data is used to calculate the internal resistance;

[0011] If the battery pack is not completely discharged, determine whether the next single battery to be discharged has passed the safety audit within the next safety period. If the next single battery has passed the safety audit and the status of the communication channel is idle, send new first indication information to the next single battery through the communication channel. The new first indication information is used to instruct the next single battery to perform discharge. After the idle state of the communication channel ends, obtain monitoring data of the next single battery through the communication channel until the battery pack is completely discharged.

[0012] In a feasible design, determining whether a single storage battery to be discharged has passed the safety audit includes:

[0013] According to the time since the last single battery was discharged, it is determined whether the single battery to be discharged has passed the safety audit.

[0014] In a feasible design, determining whether a single storage battery to be discharged has passed the safety audit includes:

[0015] If the time since the last single battery was discharged exceeds a preset time, it is determined whether the single battery to be discharged has passed the safety review based on the status information of the single battery, wherein the preset time is greater than the maximum duration of the single battery discharge, and the status information is used to indicate whether an alarm has occurred in the single battery.

[0016] In a feasible design, determining whether a single storage battery to be discharged has passed the safety audit includes:

[0017] If the status information indicates that no alarm has occurred in the single storage battery, it is determined whether the single storage battery to be discharged has passed the safety audit based on the historical status data of the single storage battery.

[0018] In a feasible design, the historical status data includes temperature data of the single storage battery. According to the historical status data of the single storage battery, determining whether the single storage battery to be discharged has passed the safety audit includes:

[0019] It is determined whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature of the single storage battery in the first preset period of time.

[0020] In a feasible design, the historical status data also includes voltage data of the single storage battery. According to the average value of the temperature of the single storage battery in the first preset period, determining whether the single storage battery to be discharged has passed the safety audit includes:

[0021] It is determined whether the single storage battery to be discharged passes the safety audit according to the average values ​​of the temperature and the average values ​​of the voltage of the single storage battery in the first preset period.

[0022] In a feasible design, the historical status data also includes the internal resistance data of the single storage battery. According to the average value of the temperature and the average value of the voltage of the single storage battery in the first preset period, determining whether the single storage battery to be discharged has passed the safety audit includes:

[0023] Whether the single storage battery to be discharged passes the safety audit is determined according to the average value of the temperature, the average value of the voltage, and the change trend of the internal resistance of the single storage battery in the first preset time period.

[0024] In one possible design, the method further includes:

[0025] If the average value of the temperature of the single storage battery in the first preset time period does not exceed the first threshold value, the average value of the voltage does not exceed the second threshold value, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests, it is determined that the single storage battery to be discharged has passed the safety review;

[0026] Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit.

[0027] In a feasible design, whether the single battery to be discharged has passed the safety audit is determined based on the time since the last single battery was discharged, including:

[0028] If the base station to which the single storage battery belongs does not generate an alarm of a preset level within the second preset time period, it is determined whether the single storage battery to be discharged has passed the safety review based on the time since the last single storage battery was discharged.

[0029] In a second aspect, a device for collecting internal resistance of a battery pack in a base station is provided, which is deployed in a power environment monitoring system and includes:

[0030] A safety audit module is used to determine whether a single battery to be discharged has passed the safety audit during the safety period of the test cycle. The single battery is the basic unit of the battery pack. The safety period is the period outside the peak communication period.

[0031] The safety audit module is also used to determine again whether the single battery has passed the safety audit within the next safety period if the single battery has not passed the safety audit;

[0032] An information transmission module, used for sending first indication information to the single storage battery through the communication channel if the single storage battery passes the safety audit and the communication channel for collecting the battery monitoring data is in an idle state, wherein the first indication information is used for instructing the single storage battery to perform discharge;

[0033] A data acquisition module, used to obtain monitoring data of a single battery through the communication channel after the idle state of the communication channel ends, wherein the monitoring data includes discharge data, and the discharge data is used to calculate the internal resistance;

[0034] If the battery pack is not completely discharged, the safety audit module is also used to determine whether the next single battery to be discharged has passed the safety audit within the next safety period. The information transmission module is also used to send new first indication information to the next single battery through the communication channel if the next single battery has passed the safety audit and the state of the communication channel is idle. The new first indication information is used to instruct the next single battery to discharge. The data acquisition module is also used to obtain monitoring data of the next single battery through the communication channel after the idle state of the communication channel ends, until the battery pack is completely discharged.

[0035] Since the load of the base station is usually high during busy working hours, discharging the battery pack at this time may affect the stability of the entire power supply system. Therefore, the embodiment of the present application performs the internal resistance test of the single battery in the safe period of the test cycle. Before the single battery to be discharged is discharged in the safe period, a safety audit is performed on it to determine whether it is suitable for discharge, so as to improve the safety of the discharge of the single battery. Based on the fact that the discharge of a single battery takes up to 50 milliseconds, and the power environment monitoring system collects the monitoring data of the battery through the communication channel every few hundred milliseconds, the present application only collects the internal resistance of one battery in each safe period. Moreover, if the single battery passes the safety audit, the first indication information is sent when the communication channel state for collecting the battery monitoring data is idle, that is, the communication gap for obtaining the monitoring data of the battery by the power environment monitoring system is used to operate the single battery discharge, which can ensure that the monitoring data of the battery equipment in the base station is not interrupted. In addition, the scheme is deployed to the power link monitoring system by remotely upgrading the front-end monitoring program, realizing the automation of the internal resistance collection of the battery pack in the base station, reducing manual intervention, and greatly saving human resources. It also achieves the purpose of reducing equipment failures, reducing costs and maintaining the safe operation of the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 is a schematic flow chart of a method for collecting the internal resistance of a battery pack in a base station provided by an exemplary embodiment of the present application;

[0038] Figure 2 is a schematic flow chart of another method for collecting the internal resistance of a battery pack in a base station provided by an exemplary embodiment of the present application;

[0039] Figure 3 It is a schematic diagram of a device for collecting the internal resistance of a battery pack in a base station provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] At present, when the internal resistance test of the battery pack of the base station is carried out, the maintenance personnel usually observe the operating status of each device in the base station on site to determine whether it can be discharged. If the operating status of each device in the base station is healthy, it is determined that it can be discharged. Then the operator in the background is notified to remotely operate the battery pack to discharge. After the discharge is completed, the maintenance personnel record the battery pack discharge operation log and collect the data of each single battery in the battery pack to calculate the internal resistance of each single battery. This solution has the following disadvantages:

[0042] (1) The number of base stations is huge (hundreds of thousands), which requires a lot of manpower to test the internal resistance of battery packs, which is inefficient.

[0043] (2) Discharging all the individual cells in a battery pack at the same time is very dangerous and may cause serious accidents such as the battery pack being discharged, base station being paralyzed, battery pack heating causing fire, etc., and also threatens the safety of maintenance personnel.

[0044] (3) When the backend remotely controls the battery pack discharge, the communication channel is occupied. Usually, it takes 50 milliseconds for each single battery to discharge. For example, for a battery pack consisting of 240 single batteries, it takes at least 12 seconds to complete a battery pack discharge. This means that the monitoring of the battery pack is stopped for 12 seconds. If the communication is not smooth and the discharge operation needs to be repeated, the monitoring of the battery pack will be suspended for a longer time. If a dangerous situation occurs in the battery pack, the suspension of monitoring will result in failure to detect it in time.

[0045] In order to solve the above problems, Figure 1As shown, the present application provides a method for collecting the internal resistance of a battery pack in a base station, which is applied to a power environment monitoring system, and the method includes:

[0046] S110, determining whether the single storage battery to be discharged has passed the safety audit within the safety period of the test cycle.

[0047] Among them, single batteries are the basic units that constitute the battery pack, and the safe period is the period outside the communication peak period.

[0048] The test cycle can be set according to actual needs, for example, setting the test cycle to half a month.

[0049] Exemplarily, it is determined whether it is in a safe period at regular intervals. The safe period is a period other than busy communication periods such as night time, holiday time, Monday time, weekend time, beginning of month time, end of month time, beginning of work time, and end of work time.

[0050] Since the load of the base station is usually high during busy working hours, discharging the battery pack at this time may affect the stability of the entire power system. The above example can better balance the load of the power system and ensure the stable operation of the system by properly arranging the discharge time.

[0051] In a feasible design, whether the single battery to be discharged has passed the safety audit is determined in the following manner:

[0052] According to the time since the last single battery was discharged, it is determined whether the single battery to be discharged has passed the safety audit.

[0053] The time from the last discharge of a single storage battery can be the time from the start of discharge of the last single storage battery, or the time from the completion of discharge of the last single storage battery.

[0054] The concentrated discharge of multiple single batteries may cause serious accidents such as emptying the battery pack, paralyzing the base station, and causing fire due to overheating of the battery pack. The time since the last single battery was discharged can reflect whether the last single battery was discharged completely. Therefore, determining whether the single battery to be discharged has passed the safety review based on the time since the last single battery was discharged can avoid the adverse effects caused by the concentrated discharge of multiple single batteries.

[0055] Exemplarily, if the time since the last single battery was discharged does not exceed the preset time, it is determined that the single battery to be discharged has not passed the safety audit, wherein the preset time is greater than the maximum duration of the single battery discharge to ensure that simultaneous discharge does not occur between two single batteries.

[0056] In the above example, if the time from the current moment to the last single battery discharge does not exceed the preset time, it means that the last single battery has not been fully discharged. It is unsafe to discharge the single battery to be discharged at present, so it is determined that the single battery to be discharged has not passed the safety review to ensure the safety of the battery pack.

[0057] For example, if the time since the last single battery was discharged exceeds the preset time, it means that discharging the single battery to be discharged will not cause concentrated discharge, and it can be determined that the single battery to be discharged has passed the safety review.

[0058] In order to further improve the safety of discharging a single battery, it is possible to first determine whether the alarm generated by the base station to which the single battery belongs during the second preset period affects the discharge safety, and then determine whether the single battery to be discharged has passed the safety review based on the time since the last single battery was discharged. The specific steps include:

[0059] If the base station to which the single storage battery belongs does not generate an alarm of a preset level within the second preset time period, it is determined whether the single storage battery to be discharged has passed the safety review based on the time since the last single storage battery was discharged.

[0060] The second preset period can be set according to actual needs, such as the first 3 days.

[0061] The preset level can be set according to actual needs. For example, the alarm levels are divided into emergency alarm, minor alarm and prompt alarm. Each device in the base station may issue alarms of various levels, among which the alarms of the lower level (such as prompt alarm) account for the majority and can be ignored. Therefore, the preset level can be set to the most serious level among the alarm levels, that is, the emergency level alarm.

[0062] Exemplarily, if the base station to which the single storage battery belongs generates an alarm of a preset level within the second preset time period, it is determined again within the next safety time period whether the base station to which the single storage battery belongs generates an alarm of a preset level within the second preset time period.

[0063] Therefore, if the base station to which the single battery belongs generates an alarm of a preset level within the second preset period, it means that the current base station has equipment in abnormal operating status, which may affect the safety of the discharge of the single battery. At this time, the maintenance personnel will handle the alarm of the serious level, and after handling it, they can confirm the alarm of the base station equipment again in the next safe period. If the base station to which the single battery belongs does not generate an alarm of the preset level within the second preset period, it means that the operating status of each device in the current base station is relatively normal, and it can continue to determine whether the single battery has passed the safety review, further improving the safety of the discharge of the single battery.

[0064] In a feasible design, whether the single battery to be discharged has passed the safety audit is determined by:

[0065] If the time since the last single battery was discharged exceeds a preset time, it is determined whether the single battery to be discharged has passed the safety review based on the status information of the single battery, wherein the preset time is greater than the maximum duration of the single battery discharge, and the status information is used to indicate whether an alarm has occurred in the single battery.

[0066] Whether the state of a single battery is normal affects the safety of discharge. Therefore, in the above example, when the time since the last single battery was discharged exceeds the preset time, it can be more accurately determined whether the single battery to be discharged has passed the safety review based on the state information of the single battery.

[0067] Exemplarily, if the status information indicates that an alarm has occurred in a single storage battery, it is determined that the single storage battery to be discharged has not passed the safety audit. If the status information indicates that no alarm has occurred in a single storage battery, it is determined that the single storage battery to be discharged has passed the safety audit.

[0068] Although it may be judged whether the base station has a serious level of alarm, in general, the alarm level of a single battery is low and may be ignored. However, if a single battery alarm occurs, it may have an adverse effect on discharge. Therefore, it is necessary to further judge whether a single battery alarm occurs.

[0069] In a feasible design, whether the single battery to be discharged has passed the safety audit is determined in the following manner:

[0070] If the status information indicates that no alarm has occurred in the single storage battery, it is determined whether the single storage battery to be discharged has passed the safety audit based on the historical status data of the single storage battery.

[0071] Since the historical status data can reflect the temperature, voltage, internal resistance and other conditions of the single battery over a period of time, it is of great significance for evaluating the current health status of the single battery and predicting its performance during the discharge process. Therefore, if the single battery is in normal condition, in order to further improve the safety of the single battery discharge, the above example can further accurately determine whether the single battery to be discharged has passed the safety review based on the historical status data of the single battery.

[0072] In a feasible design, the historical status data includes the temperature data of the single storage battery, and the following method is used to determine whether the single storage battery to be discharged has passed the safety audit according to the historical status data of the single storage battery:

[0073] It is determined whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature of the single storage battery in the first preset period of time.

[0074] The first preset period can be set according to actual needs, for example, the first three days.

[0075] Exemplarily, if the average value of the temperature of the single battery in the first preset time period exceeds the first threshold, it is determined that the single battery to be discharged has not passed the safety audit. Otherwise, it is determined that the single battery to be discharged has passed the safety audit. The first threshold is set according to actual needs.

[0076] The above example can accurately evaluate the status of the single battery in a specific time period by focusing on the comparison between the average temperature of the single battery in the first preset time period and the first threshold. When the temperature average exceeds the first threshold, it can quickly determine that the battery has not passed the safety audit and timely discover potential safety hazards. This helps to take measures before the actual discharge operation, such as suspending discharge, repairing or replacing the battery, etc., to effectively avoid serious safety accidents such as fire and explosion caused by battery failure, and ensure the safety of equipment and personnel. For single batteries that have passed the safety audit (the temperature average does not exceed the threshold), during the discharge process, due to their relatively stable temperature state, the consistency and reliability of battery performance can be guaranteed.

[0077] Exemplarily, the historical status data also includes voltage data of a single storage battery, and whether the single storage battery to be discharged has passed the safety audit is determined in the following manner:

[0078] According to the average value of the voltage of the single storage battery in the first preset time period, it is determined whether the single storage battery to be discharged has passed the safety audit.

[0079] If the average voltage of the single battery in the first preset period does not exceed the second threshold, it is determined that the single battery to be discharged has passed the safety audit, otherwise, it is determined that the single battery to be discharged has not passed the safety audit. The second threshold can be set according to actual needs.

[0080] The above example evaluates the state of a single battery according to the average value of the voltage of the single battery in the first preset period of time, which can effectively avoid the discharge of batteries with abnormal voltage, prevent dangerous situations such as over-discharge and short circuit, and ensure that the battery state is relatively stable during the discharge process.

[0081] Exemplarily, the historical status data also includes the internal resistance data of the single storage battery, and whether the single storage battery to be discharged has passed the safety review is determined in the following manner:

[0082] According to the internal resistance variation trend of the single storage battery in the first preset time period, it is determined whether the single storage battery to be discharged has passed the safety audit.

[0083] Exemplarily, if the single battery does not show a trend of increasing values ​​after two consecutive tests in the first preset time period, it is determined that the single battery to be discharged has passed the safety audit; otherwise, it is determined that the single battery to be discharged has not passed the safety audit.

[0084] The above example uses the change trend of the internal resistance of the single battery in the first preset period as the basis for judgment. If the value does not increase after two consecutive tests, it indicates that the battery state is relatively stable, that is, it has passed the safety review and can be discharged. This reduces the risk of overheating, bulging, or even explosion caused by internal abnormalities in the battery, and further improves the safety of single battery discharge.

[0085] In order to further accurately evaluate whether a single battery has passed the safety audit, any two or three of the three factors of temperature, voltage and internal resistance change trend may also be comprehensively considered. The following describes an implementation method for determining whether a single battery has passed the safety audit based on multiple factors.

[0086] In a feasible design, the historical status data also includes voltage data of the single storage battery, which is implemented in the following manner: determining whether the single storage battery to be discharged has passed the safety audit according to the average value of the temperature of the single storage battery in the first preset time period:

[0087] It is determined whether the single storage battery to be discharged passes the safety audit according to the average values ​​of the temperature and the average values ​​of the voltage of the single storage battery in the first preset period.

[0088] Exemplarily, if the average value of the temperature of the single storage battery in the first preset time period does not exceed the first threshold value, and the average value of the voltage does not exceed the second threshold value, it is determined that the single storage battery to be discharged has passed the safety audit. Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit. The second threshold value is set according to actual needs.

[0089] The above example comprehensively considers the two key factors of temperature and voltage, which can more comprehensively check the potential risks of the battery during discharge. For example, when the temperature is too high, the chemical reaction inside the battery may become unstable and easily cause thermal runaway; and abnormal voltage may mean that there is a problem with the internal structure or electrochemical process of the battery. By monitoring these two indicators at the same time, safety hazards caused by misjudgment of a single factor can be effectively avoided, ensuring the safety and reliability of the discharge process.

[0090] For example, the voltage and internal resistance change trends may be comprehensively considered to accurately determine whether the single battery to be discharged has passed the safety review:

[0091] According to the average value of the voltage and the internal resistance variation trend of the single storage battery in the first preset time period, it is determined whether the single storage battery to be discharged has passed the safety audit.

[0092] Exemplarily, if the average value of the voltage of the single storage battery in the first preset time period does not exceed the second threshold value, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests, it is determined that the single storage battery to be discharged has passed the safety audit. Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit.

[0093] In a feasible design, the historical status data also includes the internal resistance data of the single storage battery, which is implemented in the following manner: determining whether the single storage battery to be discharged has passed the safety audit according to the average value of the temperature and the average value of the voltage of the single storage battery in the first preset time period:

[0094] Whether the single storage battery to be discharged passes the safety audit is determined according to the average value of the temperature, the average value of the voltage, and the change trend of the internal resistance of the single storage battery in the first preset time period.

[0095] The above example determines whether the safety audit has been passed by comprehensively considering the average temperature, average voltage and internal resistance change trend of the single battery, which has a significant effect on the safety assessment of battery discharge. It can comprehensively and accurately assess the battery status, discover potential risks in time, avoid failures or safety accidents during discharge, and further ensure stable and reliable discharge performance.

[0096] In a feasible design, if the average value of the temperature of the single storage battery in the first preset time period does not exceed the first threshold value, the average value of the voltage does not exceed the second threshold value, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests, it is determined that the single storage battery to be discharged has passed the safety review;

[0097] Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit.

[0098] The above example comprehensively considers temperature factors, voltage factors and internal resistance change trend factors, making the safety assessment of battery discharge more comprehensive and accurate. It can reduce potential hidden dangers and reduce the risk of misjudgment. It can also effectively prevent failures. When the temperature and voltage are within a reasonable range and the internal resistance is stable, the chemical reaction and material transfer inside the battery are normal, which can ensure the stable discharge process, that is, pass the safety audit. On the contrary, if any one of them does not meet the requirements, it can be warned in time to stop the discharge operation and prevent serious safety accidents such as overheating, combustion, short circuit and explosion.

[0099] S120: If the single storage battery fails the safety audit, determine again whether the single storage battery passes the safety audit within the next safety period.

[0100] S130: If the single storage battery passes the safety audit and the communication channel for collecting battery monitoring data is in an idle state, first indication information is sent to the single storage battery through the communication channel.

[0101] The first indication information is used to instruct the single battery to discharge. The monitoring data includes temperature data, voltage data, current data, and the like.

[0102] Exemplarily, if the single storage battery passes the safety audit and the state of the communication channel for collecting storage battery monitoring data is not idle, then it is determined again in the next safety period whether the single storage battery passes the safety audit.

[0103] In the above example, although the single battery has passed the safety audit, the communication channel used to collect battery monitoring data is not idle, which means that the power environment monitoring system is collecting battery monitoring data. Since sending the first indication information to the single battery requires occupying the communication channel, in order not to affect the monitoring of the battery, it is necessary to wait for the next safe period to conduct a safety audit on the single battery.

[0104] Exemplarily, the method further comprises:

[0105] Determine whether the battery pack is fully discharged;

[0106] If the battery pack is completely discharged, wait for the next internal resistance test cycle to start, and then re-execute the step of discharging the battery pack.

[0107] S140, after the idle state of the communication channel ends, the monitoring data of the single battery is obtained through the communication channel.

[0108] The monitoring data includes discharge data, which is used to calculate the internal resistance. For example, the discharge data includes voltage data and current data after discharge.

[0109] S150, if the battery pack is not completely discharged, determine whether the next single battery to be discharged has passed the safety review within the next safety period; if the next single battery has passed the safety review and the state of the communication channel is idle, send new first indication information to the next single battery through the communication channel, the new first indication information is used to instruct the next single battery to perform discharge, and after the idle state of the communication channel ends, obtain monitoring data of the next single battery through the communication channel until the battery pack is completely discharged.

[0110] It should be noted that there is no strict order restriction for executing the methods S110 - S150 in the above embodiment, and they can be executed in other orders.

[0111] In combination with the above embodiments, the present application also provides a method for collecting the internal resistance of a battery pack in a base station, such as Figure 2 As shown, the following steps are included:

[0112] Step a, waiting for the battery pack internal resistance test cycle to start, after the internal resistance test cycle starts, executing step b;

[0113] Step b, periodically determine whether it is a safe period, if it is a safe period, execute step c, otherwise, execute step b;

[0114] Step c, determining whether an emergency alarm occurs in the base station within the second preset time period, if so, executing step b, otherwise, executing step d;

[0115] Step d, determining whether the time since the last single battery was discharged exceeds a preset time, if so, executing step e, otherwise, executing step b;

[0116] Step e, determining whether the single battery to be discharged currently generates an alarm, if so, executing step b, otherwise, executing step f;

[0117] Step f, determining whether the single battery can be discharged according to the historical status data, if so, executing step g, otherwise executing step b (for example, if the average temperature of the single battery in the first preset time period does not exceed the first threshold, the average voltage does not exceed the second threshold, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests, it means that the single battery can be discharged, and executing step g, otherwise, executing step b);

[0118] Step g, determining whether the communication channel is idle, if so, executing step h, otherwise, executing step b;

[0119] Step h, sending first instruction information to the single battery to make the single battery discharge. After the maximum duration (taking 50 milliseconds as an example), execute step i, and after the idle state of the communication channel ends, execute step j;

[0120] Step i, determining whether the battery pack is fully discharged, if so, executing step a, otherwise, executing step b;

[0121] Step j, obtaining discharge data of the single battery through the communication channel, and calculating the internal resistance according to the discharge data.

[0122] Since the load of the base station is usually high during busy working hours, discharging the battery pack at this time may affect the stability of the entire power supply system. Therefore, the embodiment of the present application performs the internal resistance test of the single battery in the safe period of the test cycle. Before the single battery to be discharged is discharged in the safe period, a safety audit is performed on it to determine whether it is suitable for discharge, so as to improve the safety of the discharge of the single battery. Based on the fact that the discharge of a single battery takes up to 50 milliseconds, and the power environment monitoring system collects the monitoring data of the battery through the communication channel every few hundred milliseconds, the present application only collects the internal resistance of one battery in each safe period. Moreover, if the single battery passes the safety audit, the first indication information is sent when the communication channel state for collecting the battery monitoring data is idle, that is, the communication gap for obtaining the monitoring data of the battery by the power environment monitoring system is used to operate the single battery discharge, which can ensure that the monitoring data of the battery equipment in the base station is not interrupted. In addition, the scheme is deployed to the power link monitoring system by remotely upgrading the front-end monitoring program, realizing the automation of the internal resistance collection of the battery pack in the base station, reducing manual intervention, and greatly saving human resources. It also achieves the purpose of reducing equipment failures, reducing costs and maintaining the safe operation of the base station.

[0123] like Figure 3 As shown, the present application provides a device for collecting the internal resistance of a battery pack in a base station, which is deployed in a power environment monitoring system and includes:

[0124] A safety audit module is used to determine whether a single battery to be discharged has passed the safety audit during the safety period of the test cycle. The single battery is the basic unit of the battery pack. The safety period is the period outside the peak communication period.

[0125] The safety audit module is also used to determine again whether the single battery has passed the safety audit within the next safety period if the single battery has not passed the safety audit;

[0126] An information transmission module, used for sending first indication information to the single storage battery through the communication channel if the single storage battery passes the safety audit and the communication channel for collecting the battery monitoring data is in an idle state, wherein the first indication information is used for instructing the single storage battery to perform discharge;

[0127] A data acquisition module, used to obtain monitoring data of a single battery through the communication channel after the idle state of the communication channel ends, wherein the monitoring data includes discharge data, and the discharge data is used to calculate the internal resistance;

[0128] If the battery pack is not completely discharged, the safety audit module is also used to determine whether the next single battery to be discharged has passed the safety audit within the next safety period. The information transmission module is also used to send new first indication information to the next single battery through the communication channel if the next single battery has passed the safety audit and the state of the communication channel is idle. The new first indication information is used to instruct the next single battery to discharge. The data acquisition module is also used to obtain monitoring data of the next single battery through the communication channel after the idle state of the communication channel ends, until the battery pack is completely discharged.

[0129] In a feasible design, the safety audit module is implemented in the following manner to determine whether the single battery to be discharged has passed the safety audit:

[0130] According to the time since the last single battery was discharged, it is determined whether the single battery to be discharged has passed the safety audit.

[0131] In a feasible design, the safety audit module is implemented in the following manner to determine whether the single battery to be discharged has passed the safety audit:

[0132] If the time since the last single battery was discharged exceeds a preset time, it is determined whether the single battery to be discharged has passed the safety review based on the status information of the single battery, wherein the preset time is greater than the maximum duration of the single battery discharge, and the status information is used to indicate whether an alarm has occurred in the single battery.

[0133] In a feasible design, the safety audit module is implemented in the following manner to determine whether the single battery to be discharged has passed the safety audit:

[0134] If the status information indicates that no alarm has occurred in the single storage battery, it is determined whether the single storage battery to be discharged has passed the safety audit based on the historical status data of the single storage battery.

[0135] In a feasible design, the historical status data includes the temperature data of the single battery, and the safety audit module is implemented in the following manner to determine whether the single battery to be discharged has passed the safety audit according to the historical status data of the single battery:

[0136] It is determined whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature of the single storage battery in the first preset period of time.

[0137] In a feasible design, the historical status data also includes voltage data of the single storage battery, and the safety audit module is implemented in the following manner to determine whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature of the single storage battery in the first preset time period:

[0138] It is determined whether the single storage battery to be discharged passes the safety audit according to the average values ​​of the temperature and the average values ​​of the voltage of the single storage battery in the first preset period.

[0139] In a feasible design, the historical status data also includes the internal resistance data of the single storage battery. The safety audit module is implemented in the following manner to determine whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature and the average value of the voltage of the single storage battery in the first preset time period:

[0140] Whether the single storage battery to be discharged passes the safety audit is determined according to the average value of the temperature, the average value of the voltage, and the change trend of the internal resistance of the single storage battery in the first preset time period.

[0141] In a feasible design, the safety audit module is further used to determine that the single storage battery to be discharged has passed the safety audit if the average value of the temperature of the single storage battery in the first preset time period does not exceed the first threshold value, the average value of the voltage does not exceed the second threshold value, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests;

[0142] Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit.

[0143] In a feasible design, the safety audit module is implemented in the following manner to determine whether the single battery to be discharged has passed the safety audit according to the time since the last single battery was discharged:

[0144] If the base station to which the single storage battery belongs does not generate an alarm of a preset level within the second preset time period, it is determined whether the single storage battery to be discharged has passed the safety review based on the time since the last single storage battery was discharged.

[0145] For other implementations and effects of the above-mentioned device, please refer to the description in the embodiment of the method for collecting the internal resistance of the battery in the base station, which will not be repeated here.

[0146] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0147] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0148] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples, and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0149] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0150] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0151] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for collecting the internal resistance of a battery pack in a base station, applied to a power environment monitoring system, characterized in that: include: During a safety period of a test cycle, determining whether a single storage battery to be discharged has passed a safety audit according to a time period since the last single storage battery was discharged, wherein the single storage battery is a basic unit constituting a storage battery pack, and the safety period is a period outside a communication peak period, wherein determining whether a single storage battery to be discharged has passed a safety audit according to a time period since the last single storage battery was discharged includes: If the time since the last single battery was discharged exceeds a preset time, determining whether the single battery to be discharged has passed the safety audit based on the status information of the single battery, wherein the preset time is greater than the maximum duration of the discharge of the single battery, and the status information is used to indicate whether an alarm occurs in the single battery; If the time from the last single battery discharge does not exceed the preset time, it is determined that the single battery to be discharged has not passed the safety review; If the single storage battery fails the safety audit, determining again within the next safety period whether the single storage battery passes the safety audit; If the single storage battery passes the safety audit and the communication channel for collecting battery monitoring data is in an idle state, first indication information is sent to the single storage battery through the communication channel, where the first indication information is used to instruct the single storage battery to perform discharge; After the idle state of the communication channel ends, monitoring data of the single battery is acquired through the communication channel, the monitoring data including discharge data, and the discharge data is used to calculate the internal resistance; If the battery pack is not completely discharged, determine whether the next single battery to be discharged has passed the safety audit within the next safety period; if the next single battery has passed the safety audit and the state of the communication channel is idle, send new first indication information to the next single battery through the communication channel, and the new first indication information is used to instruct the next single battery to perform discharge; after the idle state of the communication channel ends, obtain monitoring data of the next single battery through the communication channel until the battery pack is completely discharged.

2. The method according to claim 1, characterized in that The step of determining whether the single storage battery to be discharged has passed the safety audit includes: If the status information indicates that no alarm has occurred in the single storage battery, it is determined whether the single storage battery to be discharged has passed the safety audit according to the historical status data of the single storage battery.

3. The method according to claim 2, characterized in that The historical status data includes temperature data of the single storage battery, and determining whether the single storage battery to be discharged has passed the safety audit based on the historical status data of the single storage battery includes: It is determined whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature of the single storage battery in the first preset time period.

4. The method according to claim 3, characterized in that The historical status data also includes voltage data of the single storage battery. The step of determining whether the single storage battery to be discharged has passed the safety audit based on the average value of the temperature of the single storage battery in the first preset period includes: It is determined whether the single storage battery to be discharged passes the safety audit according to the average value of the temperature and the average value of the voltage of the single storage battery in the first preset period.

5. The method according to claim 4, characterized in that The historical status data also includes internal resistance data of the single storage battery. The determining whether the single storage battery to be discharged has passed the safety audit based on the average value of the temperature and the average value of the voltage of the single storage battery in the first preset time period includes: Whether the single storage battery to be discharged passes the safety audit is determined according to the average value of the temperature, the average value of the voltage, and the change trend of the internal resistance of the single storage battery in the first preset time period.

6. The method according to claim 5, characterized in that The method further comprises: If the average value of the temperature of the single storage battery in the first preset time period does not exceed the first threshold value, the average value of the voltage does not exceed the second threshold value, and the internal resistance does not show a trend of increasing values ​​after two consecutive tests, it is determined that the single storage battery to be discharged has passed the safety review; Otherwise, it is determined that the single storage battery to be discharged has not passed the safety audit.

7. The method according to any one of claims 1 to 6, characterized in that The step of determining whether the single storage battery to be discharged has passed the safety audit according to the time since the last single storage battery was discharged includes: If the base station to which the single storage battery belongs does not generate an alarm of a preset level within the second preset time period, it is determined whether the single storage battery to be discharged has passed the safety review according to the time since the last single storage battery was discharged.

8. A device for collecting internal resistance of a battery pack in a base station, deployed in a power environment monitoring system, characterized in that: include: The safety audit module is used to determine whether the single storage battery to be discharged has passed the safety audit according to the time length since the last single storage battery was discharged during the safety period of the test cycle, wherein the single storage battery is a basic unit constituting the battery pack, and the safety period is a period outside the communication peak period, wherein the determination of whether the single storage battery to be discharged has passed the safety audit according to the time length since the last single storage battery was discharged includes: If the time since the last single battery was discharged exceeds a preset time, determining whether the single battery to be discharged has passed the safety audit based on the status information of the single battery, wherein the preset time is greater than the maximum duration of the discharge of the single battery, and the status information is used to indicate whether an alarm occurs in the single battery; If the time from the last single battery discharge does not exceed the preset time, it is determined that the single battery to be discharged has not passed the safety review; The safety audit module is also used to determine again whether the single storage battery has passed the safety audit within the next safety period if the single storage battery has not passed the safety audit; An information transmission module, configured to send first indication information to the single storage battery through the communication channel if the single storage battery passes the safety audit and the communication channel for collecting battery monitoring data is idle, wherein the first indication information is used to instruct the single storage battery to perform discharge; A data acquisition module, used for acquiring monitoring data of the single battery through the communication channel after the idle state of the communication channel ends, wherein the monitoring data includes discharge data, and the discharge data is used for calculating the internal resistance; If the battery pack is not completely discharged, the safety audit module is further used to determine whether the next single battery to be discharged has passed the safety audit within the next safety period. The information transmission module is further used to send new first indication information to the next single battery through the communication channel if the next single battery has passed the safety audit and the state of the communication channel is idle, and the new first indication information is used to instruct the next single battery to perform discharge. The data acquisition module is further used to obtain monitoring data of the next single battery through the communication channel after the idle state of the communication channel ends, until the battery pack is completely discharged.

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