Method and system for evaluating health of battery in energy storage power station

Abstract

The invention relates to a health evaluation method and system for a battery in an energy storage power station, and belongs to the technical field of power systems. The evaluation method comprises the following steps: setting a score weight of each measurement type in a score calculation formula of a to-be-measured battery, a threshold value and a corresponding score reduction value of the measurement type needing to participate in remote measurement, a score reduction value of the measurement type needing to participate in remote signaling when a remote signaling action occurs, a preset early warning value and a detection period; detecting the to-be-detected battery according to the detection period; when a telemetering out-of-limit phenomenon occurs in the measurement type participating in telemetering, deducting the overall score of the to-be-measured battery according to the score reduction value; deducting the overall score of the to-be-measured battery according to the deduction value when the measurement type participating in the remote signaling has a remote signaling action; the overall score is used to evaluate the state of health of the battery. The working efficiency of operation and maintenance personnel can be improved.

Description

Technical Field

[0001] The invention relates to a health evaluation method and an evaluation system for batteries in an energy storage power station, belonging to the technical field of power systems. Background Art

[0002] In recent years, provincial companies of State Grid have successively issued notices to vigorously promote the construction of energy storage power stations supporting new energy power generation projects. The number of batteries in energy storage power stations is huge, and battery failure can easily lead to fire. Therefore, it is necessary to monitor the health status of batteries in energy storage power stations.

[0003] The published text of the Chinese invention patent application with application publication number CN105223514A discloses a reliability judgment method for large-capacity energy storage equipment. This method collects the voltage, current, and power of each battery stack, battery family, and battery cell through the energy storage power station automation monitoring system, and automatically completes the calculation of the reliability evaluation index of the large-capacity energy storage equipment through the calculation module. Then, the evaluation index is compared with the predetermined limit through the limit alarm module to determine whether the index is abnormal. If it is abnormal, an alarm prompt is given, and the calculation results and evaluation results are historically stored, providing historical query, report preparation, and alarm prompt functions. This method realizes the judgment of the reliability index of the large-capacity energy storage station, and will give an alarm when the index is abnormal. At the same time, it also greatly reduces the workload of operators who used to manually calculate the evaluation index, improves work efficiency, minimizes the errors caused by manual calculation, and improves the accuracy of the calculation results.

[0004] However, after using this method, when the equipment is abnormal, too many reliability evaluation indicators are obtained, and the operation and maintenance personnel need to judge the reliability indicators one by one to determine which ones can be ignored and which ones need maintenance, resulting in low work efficiency of the operation and maintenance personnel. Summary of the invention

[0005] The purpose of the present invention is to provide a health evaluation method and evaluation system for batteries in energy storage power stations, so as to solve the problem that in the prior art, there is no emphasis on health monitoring of batteries in energy storage power stations, which causes operation and maintenance personnel to screen among numerous alarm information or abnormal measurement information, resulting in low work efficiency.

[0006] To achieve the above object, the solution of the present invention includes: A method for evaluating the health of a battery in an energy storage power station of the present invention comprises the following steps: Set the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, the preset warning value and the detection cycle; Test the battery to be tested according to the test cycle; When the telemetry over-limit phenomenon occurs in the measurement type involved in telemetry, the overall score of the battery to be tested will be deducted according to the deduction value; when the telesignaling action occurs in the measurement type involved in telesignaling, the overall score of the battery to be tested will be deducted according to the deduction value; The overall score is used to evaluate the battery's health.

[0007] Furthermore, for the same measurement type involved in telemetry, different thresholds and corresponding deduction values ​​are set; For the same measurement type participating in telemetry, if the telemetry exceeds the upper limit, the larger the threshold, the larger the corresponding deduction value; For the same measurement type participating in telemetry, the measurement type with the lower limit of telemetry occurs, the smaller the threshold, the greater the corresponding deduction value.

[0008] Furthermore, after deducting points from the overall number of batteries to be tested according to the deduction value and the deduction value, the historical scoring results are stored and a scoring history curve is drawn, and the overall scores of the batteries to be tested are sorted in ascending order.

[0009] Furthermore, before setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the preset warning value and the detection cycle, it also includes: checking whether the measurement types in the battery measurement model library are complete; When complete, select the measurement type that has a greater impact on battery health from the battery measurement model library, and generate a score calculation formula for the battery to be tested based on the selected measurement type; When it is incomplete, add the required measurement types to the battery measurement model library, select the measurement types that have a greater impact on battery health, and generate a score calculation formula for the battery to be tested based on the selected measurement types.

[0010] Furthermore, it also includes: when the overall score is less than a preset warning value, prompting is given by pushing an alarm window or a voice alarm or an abnormal event SMS.

[0011] A health assessment system for batteries in an energy storage power station of the present invention includes a processor for executing the following steps: Set the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, the preset warning value and the detection cycle; Test the battery to be tested according to the test cycle; When the telemetry over-limit phenomenon occurs in the measurement type involved in telemetry, the overall score of the battery to be tested will be deducted according to the deduction value; when the telesignaling action occurs in the measurement type involved in telesignaling, the overall score of the battery to be tested will be deducted according to the deduction value; The overall score is used to evaluate the battery's health.

[0012] Furthermore, for the same measurement type involved in telemetry, different thresholds and corresponding deduction values ​​are set; For the same measurement type participating in telemetry, if the telemetry exceeds the upper limit, the larger the threshold, the larger the corresponding deduction value; For the same measurement type participating in telemetry, the measurement type with the lower limit of telemetry occurs, the smaller the threshold, the greater the corresponding deduction value.

[0013] Furthermore, after deducting points from the overall number of batteries to be tested according to the deduction value and the deduction value, the historical scoring results are stored and a scoring history curve is drawn, and the overall scores of the batteries to be tested are sorted in ascending order.

[0014] Furthermore, before setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the preset warning value and the detection cycle, it also includes: checking whether the measurement types in the battery measurement model library are complete; When complete, select the measurement type that has a greater impact on battery health from the battery measurement model library, and generate a score calculation formula for the battery to be tested based on the selected measurement type; When it is incomplete, add the required measurement types to the battery measurement model library, select the measurement types that have a greater impact on battery health, and generate a score calculation formula for the battery to be tested based on the selected measurement types.

[0015] Furthermore, it also includes: when the overall score is less than a preset warning value, prompting is given by pushing an alarm window or a voice alarm or an abnormal event SMS.

[0016] The beneficial effects of the present invention are as follows: as a pioneering invention, the present invention provides a method and system for evaluating the health of batteries in energy storage power stations. By setting the scoring weights of each measurement type in the scoring calculation formula of the battery to be tested, it is possible to know what measurement type needs to be focused on; by setting the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, and the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, it is possible to distinguish how much damage different measurement types cause to the battery; by setting a preset warning value and a detection cycle, and then detecting the battery to be tested according to the detection cycle; when the measurement type participating in telemetry exceeds the limit, the overall score of the battery to be tested is deducted according to the deduction value; when the measurement type participating in telesignaling occurs a telesignaling action, the overall score of the battery to be tested is deducted according to the deduction value; wherein the overall score is used to evaluate the health status of the battery, which can enable the operation and maintenance personnel to promptly discover whether the health status of the battery is good, and when there is a problem with the health status of the battery, know which measurement type caused it, so that the operation and maintenance personnel can perform maintenance in time and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of a method for evaluating the health of batteries in an energy storage power station provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] The idea of ​​the present invention is to set a threshold value and a corresponding deduction value for the measurement type that needs to participate in telemetering, and set a deduction value for the measurement type that needs to participate in telesignaling when the telesignaling action occurs; when the telemetering measurement type occurs a telemetering over-limit phenomenon, the overall score of the battery is deducted according to the corresponding deduction value; when the telesignaling measurement type occurs a telesignaling action, the overall score of the battery is deducted according to the deduction value.

[0020] Specifically: by setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, it is possible to know which measurement type needs to be focused on; by setting the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, and the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, it is possible to distinguish how much damage different measurement types cause to the battery; by setting the preset warning value and the detection cycle, and then testing the battery to be tested according to the detection cycle; when the telemetry over-limit phenomenon occurs in the measurement type participating in telemetry, the overall score of the battery to be tested is deducted according to the deduction value; when the telesignaling action occurs in the measurement type participating in telesignaling, the overall score of the battery to be tested is deducted according to the deduction value; among them, the overall score is used to evaluate the health status of the battery, which can enable the operation and maintenance personnel to promptly discover whether the health status of the battery is good, and when there is a problem with the battery health status, know which measurement type caused it, so that the operation and maintenance personnel can perform maintenance in time and improve work efficiency.

[0021] An embodiment of a method for evaluating the health of batteries in an energy storage power station: Figure 1 is a flow chart of a method for evaluating the health of a battery in an energy storage power station provided by an embodiment of the present invention, such as Figure 1 As shown, the evaluation method includes the following steps: S101, setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, the preset warning value and the detection cycle.

[0022] The measurement type may be the voltage, current, temperature, internal resistance, capacity and state of health (SOH) of the battery to be measured, etc., which is not particularly limited in the present invention.

[0023] Among them, the scoring weights of each measurement type in the scoring calculation formula of the battery to be tested, the thresholds of the measurement types that need to participate in telemetry and the corresponding deduction values, the deduction values ​​of the measurement types that need to participate in telesignaling when telesignaling actions occur, the preset warning values ​​and the settings of the detection cycle can be set by the user (i.e., manually) or by the controller, and the present invention does not specifically limit this. In order to improve the sense of user participation, this embodiment takes the user setting as an example for illustrative explanation. All settings need to ensure that the battery score calculation results calculated later are consistent with the actual situation of daily monitoring work.

[0024] Among them, different scoring weights can be assigned to each measurement type according to the battery measurement type of daily duty or operation and maintenance attention, that is, abnormalities in important measurements have a greater impact on the battery score; the sum of the scoring weights of each measurement type is 1.

[0025] The number of batteries to be tested may be one or more, which is not particularly limited in the present invention. The following description will be given by taking the case where the number of batteries to be tested is more than one as an example.

[0026] When there are multiple batteries to be tested, each battery to be tested corresponds to a scoring calculation formula; wherein the scoring calculation formulas of the multiple batteries to be tested may be the same scoring calculation formula or different scoring calculation formulas, which is not particularly limited in the present invention. In order to make the entire evaluation method simpler and easier to operate, the following explanation is given by taking the case where the scoring calculation formulas of the multiple batteries to be tested are the same scoring calculation formula.

[0027] When the scoring calculation formulas for multiple batteries to be tested are the same, different scoring weights may be set for the same measurement type in the scoring calculation formula to distinguish which measurement type is more concerned for each battery to be tested.

[0028] For example: Assuming that there are 5 batteries to be tested, the scoring calculation formula for these 5 batteries to be tested is the same, and the measurement types in the scoring calculation formula include voltage, current and temperature; set the voltage weight in the scoring calculation formula of the first battery to be tested to 0.6, the current weight to 0.3, and the temperature weight to 0.1; set the voltage weight in the scoring calculation formula of the second battery to be tested to 0.1, the current weight to 0.6, and the temperature weight to 0.3; set the voltage weight in the scoring calculation formula of the third battery to be tested to 0.1, the current weight to 0.3, and the temperature weight to 0.6; set the voltage weight in the scoring calculation formula of the fourth battery to be tested to 0.4, the current weight to 0.5, and the temperature weight to 0.1; set the voltage weight in the scoring calculation formula of the fifth battery to be tested to 0.1, the current weight to 0.1, and the temperature weight to 0.8. This means that, for the first battery to be tested, more attention is paid to the influence of the battery voltage on the battery health state; for the second battery to be tested, more attention is paid to the influence of the battery current on the battery health state; for the third battery to be tested, more attention is paid to the influence of the battery temperature on the battery health state; for the fourth battery to be tested, more attention is paid to the influence of the battery current on the battery health state; for the fifth battery to be tested, more attention is paid to the influence of the battery temperature on the battery health state.

[0029] The scoring calculation formula for the battery to be tested is set in advance, allowing users to add or delete various measurement types in the calculation formula based on the actual situation of the energy storage power station data being uploaded.

[0030] Among them, the scoring calculation formula is well known to those skilled in the art. For example, taking overvoltage, overcurrent, overtemperature and low health status as an example, the scoring calculation formula can be: score of the battery to be tested = 100-A*battery overvoltage signal action-B*battery overcurrent signal action-C*SOH telemetry exceeds the lower limit threshold-D battery temperature telemetry exceeds the upper limit threshold.

[0031] Wherein, A is the weight of voltage, B is the weight of current, C is the weight of SOH, and D is the weight of temperature. For example, A may be 0.05, B may be 0.03, C may be 0.2, and D may be 0.1.

[0032] Telemetry refers to the technology of transmitting the short-distance measurement value of the object parameter to the long-distance measurement station to achieve the long-distance measurement process, and transmit the measured results to the receiving location for recording, display and processing. Telemetry uses sensor technology, communication technology and data processing technology to achieve the measurement and data collection of a certain physical quantity at a distance.

[0033] Among them, telesignaling refers to the remote status signal, which is used to transmit the equipment status signal to the dispatch center over a long distance. For example, the switch status of the circuit breaker, the action status of the protection signal, etc. can be transmitted through telesignaling. Telesignaling can monitor the equipment status information through remote communication technology. It converts the switch quantity information of the equipment (such as closed or open status) into electrical signals and then transmits them to the dispatch center. This information includes the position signal of the switch, the action signal of the protection device, the operating status of the communication equipment, etc.

[0034] The measurement type required to participate in telemetry may be one type (eg, all temperature) or multiple types (eg, temperature, voltage, current, etc.), and the present invention does not specifically limit this.

[0035] Among them, multiple different thresholds and corresponding deduction values ​​can be set for the same measurement type, so that batteries with poor health status can be discovered in time or the health status of the batteries under test of the same measurement type can be distinguished and paid attention to. For example, among the five batteries in the above example, the temperature thresholds of the third battery are set to 40 degrees Celsius (℃) and 50℃, the deduction value corresponding to 40℃ is set to 10 points, and the deduction value corresponding to 50℃ is set to 20 points; for another example, among the five batteries in the above example, the third battery and the fifth battery are both concerned about the impact of the battery temperature on the health status of the battery. The temperature threshold of the third battery can be set to 45℃, the deduction value corresponding to 45℃ can be set to 8 points, and the temperature threshold of the fifth battery can be set to 55℃, and the deduction value corresponding to 55℃ can be set to 10 points.

[0036] S102, testing the battery to be tested according to a testing cycle.

[0037] S103, determine whether the measurement type that needs to participate in telemetering has a telemetering over-limit phenomenon, and determine whether the measurement type that needs to participate in telesignaling has a telesignaling action; when the measurement type that needs to participate in telemetering has a telemetering over-limit phenomenon, execute step S104, and when the telemetering over-limit phenomenon does not occur, continue to execute step S102; when the measurement type that needs to participate in telesignaling has a telesignaling action, execute step S105, and when the telesignaling action does not occur, continue to execute step S102.

[0038] There are multiple measurement types involved in telemetry. The larger the actual value of some measurement types involved in telemetry, the greater the damage to the battery, such as temperature, current, and voltage, etc.; while the smaller the actual value of some measurement types involved in telemetry, the greater the damage to the battery, such as SOH, etc. The situation where the actual value of the measurement type involved in telemetry exceeds the upper limit threshold is regarded as the occurrence of telemetry over-upper limit phenomenon, and the situation where the actual value of the measurement type involved in telemetry exceeds the lower limit threshold is regarded as the occurrence of telemetry over-lower limit phenomenon. That is, telemetry over-limit phenomenon refers to the occurrence of telemetry over-upper limit phenomenon and telemetry over-lower limit phenomenon.

[0039] For the same measurement type participating in telemetry, if the telemetry exceeds the upper limit, the larger the threshold, the larger the corresponding deduction value; for the same measurement type participating in telemetry, if the telemetry exceeds the lower limit, the smaller the threshold, the larger the corresponding deduction value.

[0040] Among them, the remote signaling action does not necessarily occur in every detection cycle. Only when the remote signaling action occurs will the corresponding score be subtracted from the overall score of the battery.

[0041] It is understandable that in actual applications, for multiple batteries to be tested, there may be a situation where telesignaling and telemetry may not occur at the same time. It is possible that only telesignaling occurs for all batteries, or only telemetry occurs for all batteries. When only telemetry occurs, only step S104 is executed, that is, the overall score of the battery to be tested is deducted according to the deduction value; when only telesignaling occurs, only step S105 is executed, that is, the overall score of the battery to be tested is deducted according to the deduction value. For multiple batteries, if some of the batteries only have telemetry, some of the batteries only have telesignaling, and some of the batteries have both telesignaling and telemetry, then, for the batteries that only have telemetry, only step S104 needs to be executed, that is, points are deducted from the overall score of the battery to be tested according to the deduction value; for the batteries that only have telesignaling, only step S105 needs to be executed, that is, points are deducted from the overall score of the battery to be tested according to the deduction value; for the batteries that have both telemetry and telesignaling, both step S104 and step S105 need to be executed, and points are deducted from the overall score of the battery to be tested according to the deduction value and the deduction value, which is equivalent to superimposed deductions.

[0042] S104, deducting points from the overall score of the battery to be tested according to the deduction value.

[0043] The overall score can be used to evaluate the health status of the battery. Generally, the overall score of the battery is 100 points, indicating that the battery is very healthy.

[0044] Specifically, the above example sets the temperature threshold of the third battery to 40 degrees Celsius (℃) and 50℃, sets the deduction value corresponding to 40℃ to 10 points, sets the deduction value corresponding to 50℃ to 20 points, and sets the temperature threshold of the third battery to 45℃, sets the deduction value corresponding to 45℃ to 8 points, sets the temperature threshold of the fifth battery to 55℃, sets the deduction value corresponding to 55℃ to 10 points, respectively, for example description. When the temperature threshold of the third battery is set to 40 degrees Celsius (℃) and 50℃, sets the deduction value corresponding to 40℃ to 10 points, and sets the deduction value corresponding to 50℃ to 20 points: the temperature of the third battery is detected according to the detection cycle, and when the temperature of the third battery is detected to be greater than 40℃, the overall score of the third battery is deducted, that is, 10 points are deducted from 100 points, and the overall score of the third battery is now 90 points. In the next detection cycle, if the temperature of the third battery is detected to be greater than 50℃, 20 points are deducted from 90 points. At this time, the overall score of the third battery is now 70 points. This indicates that the health status of the third battery is rapidly declining and requires special attention.

[0045] When the temperature threshold of the third battery is set to 45℃, the deduction value corresponding to 45℃ is set to 8 points, and the temperature threshold of the fifth battery is set to 55℃, and the deduction value corresponding to 55℃ is set to 10 points: the temperatures of the third and fifth batteries are tested according to the test cycle. If the temperature of the third battery is detected to be 46℃ (greater than 45℃), the overall score of the third battery is deducted, that is, 8 points are deducted from 100 points. At this time, the overall score of the third battery is 92 points. If the temperature of the third battery is detected to be 58℃ (greater than 45℃) in the next cycle, 8 points are deducted from 92 points. At this time, the overall score of the third battery is 84 points. If the temperature of the fifth battery is detected to be 55.1℃, the overall score of the fifth battery is deducted, that is, 10 points are deducted from 100 points. At this time, the overall score of the fifth battery is 90 points. If the temperature of the fifth battery is detected to be 56 degrees Celsius in the next cycle, 10 points are deducted from 90 points. At this time, the overall score of the fifth battery is 80 points. This shows that compared with the third battery, the health status of the fifth battery is more worthy of attention.

[0046] S105, deducting points from the overall score of the battery to be tested according to the deduction value.

[0047] In terms of step S104 and step S105, the overall score can be used to evaluate the health status of the battery. In general, the overall score of the battery is set to 100 points, indicating that the battery is very healthy. When there are abnormal measurement deduction items, the overall score of the battery is deducted accordingly. The lower the overall score of the battery, the worse the performance of the battery and the worse the health status. Among them, the abnormal measurement deduction items refer to the situation when the measurement type that needs to participate in telemetry exceeds its corresponding threshold and the situation when the measurement type that needs to participate in telesignaling occurs in telesignaling action.

[0048] It is understandable that when telemetry and telesignaling occur simultaneously, step S104 and step S105 are executed in no particular order and are also executed simultaneously.

[0049] In order to further improve the work efficiency of the operation and maintenance personnel, as an optional implementation, step S106 (not shown) may be performed after the overall score is deducted.

[0050] S106, determining whether the overall score is less than the warning value, and if so, giving a prompt, and if so, continuing to execute step S102.

[0051] Among them, when it is judged that the overall score is less than the warning value, it means that the corresponding battery has a major safety hazard. The user can contact the operation and maintenance personnel to check or replace it in time to prevent delays in handling battery problems and cause energy storage power station operation accidents.

[0052] Among them, reminders can be given by pushing alarm windows, voice alarms, or abnormal event text messages to avoid missing problems; in order to increase user participation, the reminder method can be selected by the user.

[0053] In order to facilitate users or maintenance personnel to understand the scoring trend of the health status of the battery to be tested, as an optional implementation, after the overall score is deducted, step S107 (not shown) may be performed first, and then step S106 may be performed.

[0054] Among them, deduction of the overall score means: deduction of the overall score according to the deduction value and the deduction value. When only telemetry occurs, the deduction value can be regarded as 0, and only the deduction value can be used to deduct the overall score; when only telesignaling occurs, the deduction value can be regarded as 0, and only the deduction value can be used to deduct the overall score.

[0055] S107: Store the historical scoring results and draw a scoring history curve.

[0056] Among them, users or operation and maintenance personnel can right-click to view the scoring history curve of a battery to be tested to understand the recent scoring trend of the battery.

[0057] By drawing a historical scoring curve, we can understand the attenuation trend of battery performance. For battery manufacturers and models that do not meet the scoring standards within a short period of time after commissioning, we can avoid using them in future energy storage power station construction, which can reduce the subsequent battery replacement and maintenance costs and improve the economic benefits of energy storage power stations.

[0058] In order to facilitate operation and maintenance personnel or users to promptly find batteries in poor health, as an optional implementation, after the overall score is deducted, step S108 (not shown) may be performed first and then step S106 may be performed.

[0059] S108, sorting the overall scores of the batteries to be tested in ascending order.

[0060] As another optional implementation, the overall scores of the batteries to be tested may be sorted in descending order.

[0061] The present invention does not specifically limit whether the overall scores of the batteries to be tested are sorted in ascending order or in descending order. In order to improve the work efficiency of the operation and maintenance personnel, this embodiment takes the overall scores of the batteries to be tested as an example for illustrative description.

[0062] Among them, in order to play a striking role, after the overall scores of each battery to be tested are sorted in ascending order, the overall scores of the batteries to be tested that are less than the threshold can be marked in red. In this way, the operation and maintenance personnel or users only need to focus on the batteries marked in red, which further improves the work efficiency of the operation and maintenance personnel.

[0063] It is understandable that after the overall score is deducted, both step S107 and step S108 may be performed, and then step S106 may be performed. When both step S107 and step S108 are performed, there is no clear order between step S107 and step S108, that is, step S107 may be performed first and then step S108, or step S108 may be performed first and then step S107.

[0064] Since the battery manufacturers and models of energy storage power stations are different, the measurement types that can be uploaded are also different. In order to expand the battery measurement model library and make the measurement types in the battery measurement model library as comprehensive as possible, as an optional implementation, step S0 (not shown) can be executed before executing step S101.

[0065] S0. Check whether the measurement types in the battery measurement model library are complete; if complete, select the measurement types that have a greater impact on battery health from the battery measurement model library, and generate a score calculation formula for the battery to be tested based on the selected measurement types; if incomplete, add the required measurement types to the battery measurement model library, select the measurement types that have a greater impact on battery health, and generate a score calculation formula for the battery to be tested based on the selected measurement types.

[0066] Among them, the battery measurement model library defines the measurement types that common energy storage battery manufacturers can send to the monitoring master station. Users can add new measurement types to the model library based on the actual situation of the energy storage power station.

[0067] A method for evaluating the health of batteries in an energy storage power station provided by an embodiment of the present invention can determine which measurement types need to be focused on by setting the scoring weights of each measurement type in the scoring calculation formula of the battery to be tested; by setting the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, and the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, it can be distinguished how much damage different measurement types cause to the battery; by setting a preset warning value and a detection cycle, and then detecting the battery to be tested according to the detection cycle; when the measurement type participating in telemetry exceeds the limit, the overall score of the battery to be tested is deducted according to the deduction value; when the measurement type participating in telesignaling occurs a telesignaling action, the overall score of the battery to be tested is deducted according to the deduction value; wherein the overall score is used to evaluate the health status of the battery, so that the operation and maintenance personnel can promptly discover whether the health status of the battery is good, and when there is a problem with the health status of the battery, know which measurement type is caused, so that the operation and maintenance personnel can perform maintenance in time and improve work efficiency.

[0068] An embodiment of a health assessment system for batteries in an energy storage power station: An embodiment of the present invention provides a health assessment system for batteries in an energy storage power station, including a processor, and the processor is used to execute the steps in the above-mentioned health assessment method for batteries in an energy storage power station.

[0069] An embodiment of the present invention provides a health assessment system for batteries in an energy storage power station, which can achieve the same beneficial effects as the above-mentioned health assessment method for batteries in an energy storage power station, and will not be described in detail here.

Claims

1. A method for evaluating the health of batteries in an energy storage power station, characterized in that: The steps include: Set the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, the preset warning value and the detection cycle; Testing the battery to be tested according to the testing cycle; When a telemetry exceeding limit occurs in the measurement type involved in the telemetry, deducting points from the overall score of the battery to be tested according to the deduction value; When a remote signaling action occurs in the measurement type participating in the remote signaling, deduct points from the overall score of the battery to be tested according to the deduction value; The overall score is used to evaluate the health status of the battery.

2. The method for evaluating the health of batteries in an energy storage power station according to claim 1, characterized in that: For the same measurement type involved in telemetry, set different thresholds and corresponding deduction values; For the same measurement type participating in telemetry, if the telemetry exceeds the upper limit, the larger the threshold, the larger the corresponding deduction value; For the same measurement type participating in telemetry, which is the measurement type with the lower limit of telemetry, the smaller the threshold, the greater the corresponding deduction value.

3. The method for evaluating the health of batteries in an energy storage power station according to claim 1, characterized in that: After deducting the overall score of the battery to be tested according to the deduction value and the deduction value, the historical scoring results are stored and a scoring history curve is drawn, and the overall scores of each battery to be tested are sorted in ascending order.

4. The method for evaluating the health of batteries in an energy storage power station according to claim 1, characterized in that: Before setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the preset warning value and the detection cycle, it also includes: checking whether the measurement types in the battery measurement model library are complete; When complete, selecting a measurement type that has a greater impact on battery health from the battery measurement model library, and generating a score calculation formula for the battery to be tested based on the selected measurement type; When it is incomplete, the required measurement type is added to the battery measurement model library, the measurement type with greater impact on battery health is selected, and the score calculation formula of the battery to be tested is generated according to the selected measurement type.

5. The method for evaluating the health of a battery in an energy storage power station according to any one of claims 1 to 4, characterized in that: Also includes: When the overall score is less than a preset warning value, a prompt is given by pushing an alarm window or a voice alarm or an abnormal event SMS.

6. A health assessment system for batteries in energy storage power stations, characterized in that: The processor is used to perform the following steps: Set the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the deduction value of the measurement type that needs to participate in telesignaling when the telesignaling action occurs, the preset warning value and the detection cycle; Testing the battery to be tested according to the testing cycle; When a telemetry exceeding limit occurs in the measurement type involved in the telemetry, deducting points from the overall score of the battery to be tested according to the deduction value; When a remote signaling action occurs in the measurement type participating in the remote signaling, deduct points from the overall score of the battery to be tested according to the deduction value; The overall score is used to evaluate the health status of the battery.

7. The health evaluation system for batteries in energy storage power stations according to claim 6 is characterized in that: For the same measurement type involved in telemetry, set different thresholds and corresponding deduction values; For the same measurement type participating in telemetry, if the telemetry exceeds the upper limit, the larger the threshold, the larger the corresponding deduction value; For the same measurement type participating in telemetry, which is the measurement type with the lower limit of telemetry, the smaller the threshold, the greater the corresponding deduction value.

8. The health evaluation system for batteries in energy storage power stations according to claim 6 is characterized in that: After deducting the overall score of the battery to be tested according to the deduction value and the deduction value, the historical scoring results are stored and a scoring history curve is drawn, and the overall scores of each battery to be tested are sorted in ascending order.

9. The health evaluation system for batteries in energy storage power stations according to claim 6, characterized in that: Before setting the scoring weight of each measurement type in the scoring calculation formula of the battery to be tested, the threshold of the measurement type that needs to participate in telemetry and the corresponding deduction value, the preset warning value and the detection cycle, it also includes: checking whether the measurement types in the battery measurement model library are complete; When complete, selecting a measurement type that has a greater impact on battery health from the battery measurement model library, and generating a score calculation formula for the battery to be tested based on the selected measurement type; When it is incomplete, the required measurement type is added to the battery measurement model library, the measurement type with greater impact on battery health is selected, and the score calculation formula of the battery to be tested is generated according to the selected measurement type.

10. The health evaluation system for batteries in an energy storage power station according to any one of claims 6 to 9, characterized in that: Also includes: When the overall score is less than a preset warning value, a prompt is given by pushing an alarm window or a voice alarm or an abnormal event SMS.

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