A remote capacity checking method, device and system for multi-group communication battery pack

Abstract

The application discloses a remote capacity checking method, device and system for a plurality of communication storage battery groups, and relates to the field of power communication storage battery operation and maintenance. The method comprises the following steps: establishing a full online main circuit loop and a charge-discharge bypass loop between a storage battery group and a bus; in a monitoring state, controlling all storage battery groups to be connected with the bus through respective full online main circuit loops, and collecting storage battery group operation parameters in real time; monitoring whether the operation parameters have abnormal states; if yes, locking the capacity checking function; if no, entering a capacity checking operation state; in the capacity checking operation state, disconnecting a to-be-tested storage battery group from the full online main circuit loop and connecting the to-be-tested storage battery group to the charge-discharge bypass loop, and controlling non-to-be-tested storage battery groups to be unidirectionally conducted with the bus through corresponding full online main circuit loops; in the capacity checking operation state, if any operation parameter is monitored to be abnormal, the capacity checking operation is terminated; and after the capacity checking operation is terminated, a capacity checking report is generated. The application realizes remote automatic capacity checking of storage batteries under the premise of uninterrupted power supply, and is safe and energy-saving.

Description

Technical Field

[0001] This invention belongs to the field of power communication battery operation and maintenance, specifically relating to a remote capacity assessment method, device and system for multiple communication battery banks. Background Technology

[0002] In a -48V DC communication power supply system, valve-regulated lead-acid battery packs, due to prolonged float charging, inevitably experience aging phenomena such as water loss, positive grid corrosion, and plate sulfation, leading to a gradual decrease in their actual capacity. To accurately assess the true health status of the battery pack and ensure sufficient load-carrying capacity and power supply duration after mains power outages or communication power failures, regular verification discharge tests and capacity tests are necessary.

[0003] Traditional single-cell battery capacity testing relies entirely on manual labor, requiring multiple personnel to bring battery discharge equipment to the site to completely disconnect the battery bank from the DC bus and conduct a continuous discharge test for at least 20 hours. Throughout the entire testing process, the power supply team must remain on-site to monitor for any abnormalities. This traditional model has significant drawbacks: heavy workload for personnel, high operational risks associated with operating off the bus and prolonged discharge, and direct energy dissipation, resulting in significant energy waste. Currently, power communication equipment rooms generally employ a redundant architecture with one communication power system configured with at least two battery banks, or two communication power systems each configured with at least one battery bank.

[0004] Therefore, there is an urgent need for a remote capacity approval technology to transform the traditional manual on-site operation method into an intelligent remote control mode, realize the automation and remoteness of the capacity approval process, thereby improving the level of digital operation and maintenance of batteries and effectively reducing the burden of power supply operation and maintenance work. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to achieve online capacity verification of batteries without interrupting power supply during the capacity verification process, and how to perform the capacity verification operation remotely and automatically, thereby reducing the amount of manual work.

[0006] To address the aforementioned technical problems, this invention provides a remote capacity assessment method for multiple communication battery packs, comprising: Establish a fully online main circuit loop and a charging / discharging bypass loop between the battery pack and the busbar; In monitoring mode, all battery packs are connected to the bus via their respective fully online main circuit loops to collect battery pack operating parameters in real time; the operating parameters are monitored for any abnormal states; if any are found, the capacity control function is locked; if none are found, the capacity control operation mode is entered. During the full-capacity operation, the battery pack under test is disconnected from the fully online main circuit loop, and the battery pack under test is connected to the charging and discharging bypass circuit. The non-battery pack under test is controlled to be unidirectionally connected to the bus through its corresponding fully online main circuit loop. If any of the operating parameters of all battery packs is detected to be abnormal during the capacity verification operation, the capacity verification operation will be terminated; a capacity verification report will be generated after the capacity verification operation is terminated or completed.

[0007] In the aforementioned remote capacity assessment method for multiple communication battery packs, the fully online main circuit consists of a normally closed contactor and a diode connected in parallel. In monitoring mode, the normally closed contactor is closed, allowing bidirectional conduction between the battery pack and the bus. During capacity assessment, the normally closed contactor of the battery pack under test is opened, disconnecting the battery pack from the fully online main circuit and connecting it to the charging / discharging bypass circuit. The normally closed contactors of the non-tested battery packs are opened, allowing unidirectional conduction between the non-tested battery packs and the bus via the diodes.

[0008] In the aforementioned remote capacity assessment method for multiple communication battery packs, the operating parameters are collected by a remote capacity assessment device, and the operating parameters include battery parameters, power supply parameters, environmental parameters, communication parameters, and the status parameters of the remote capacity assessment device.

[0009] The aforementioned remote capacity verification method for multiple communication battery packs, after entering the capacity verification operation state, further includes receiving a capacity verification command, which is one of K / D test, internal resistance test, capacity verification test, IP modification or device restart command; wherein, before executing the capacity verification command, capacity verification parameters are configured, which include battery pack information, discharge current, discharge duration, single cell voltage lower limit, and discharge capacity.

[0010] The aforementioned remote capacity assessment method for multiple communication battery packs, under capacity assessment operation conditions, includes the following sequential processes for capacity assessment testing: inter-pack circulation current monitoring, K / D testing, discharging, pre-charging, and float charging; wherein: The inter-group circulating current monitoring is used to prevent mutual charging between battery groups due to voltage differences. The specific method of inter-group circulating current monitoring is as follows: monitor the voltage of different battery groups. If the voltage difference is less than or equal to a preset threshold, inter-group circulating current will not occur, and the normally closed contactors of different battery groups will be closed. If the voltage difference is greater than the preset threshold, the normally closed contactor of the battery group with the lower voltage will be opened. The K / D test is used to perform functional tests on normally closed contactors and diodes; The discharge process involves disconnecting the normally closed contactors of all battery packs and connecting the battery pack under test to the charge / discharge bypass circuit; the battery pack under test is then charged and discharged through the charge / discharge bypass circuit to supply power to the load; when the discharge cutoff condition is met, the discharge ends and the pre-charging phase begins. The pre-charging process involves keeping the normally closed contactors of all battery packs open and charging the battery packs through the charging and discharging bypass circuit. When the voltage difference between the battery packs and other battery packs during the charging process is less than or equal to a preset threshold, the pre-charging ends and the process transitions to the float charging stage. The float charging process in the float charging stage involves closing the normally closed contactors of all battery packs, restoring the connection of the fully online main circuit, and allowing all battery packs to enter the float charging state. The aforementioned remote capacity approval method for multiple communication battery packs further includes a circulating current protection step after the capacity approval operation is terminated. The circulating current protection step is used to control the battery pack whose capacity approval operation has been terminated to remain isolated from the bus. The battery pack whose capacity approval operation has been terminated is then connected to the bus after the voltage difference between the battery pack whose capacity approval operation has been terminated and the bus voltage or the voltage difference between the battery pack whose capacity approval operation has been terminated is less than a preset threshold.

[0011] The aforementioned remote capacity approval method for multiple communication battery packs includes a circulating current protection step that performs corresponding circulating current protection operations for different capacity approval operation termination scenarios, including: In response to the discharge termination situation of communication power failure, the circulating current protection operation includes: isolating the discharged battery pack from the bus and stopping the discharge; restoring the bidirectional conduction of the non-tested battery pack and supplying power to the load; and connecting the discharged battery pack to the bus when the voltage difference between the discharged battery pack and the battery pack currently supplying power is less than a preset threshold. In response to the discharge termination situation when the non-communication power supply fails, the circulating current protection operation includes: isolating the discharged battery pack from the bus and stopping the discharge; restoring bidirectional conduction to the non-tested battery pack; charging the discharged battery pack through the charging and discharging bypass circuit; and connecting the bus when the difference between the voltage of the discharged battery pack and the bus voltage is less than a preset threshold.

[0012] In response to the charging termination situation when the communication power supply fails, the circulating current protection operation includes: stopping the charging of the battery pack and keeping it isolated from the bus; restoring bidirectional conduction of the non-tested battery pack and supplying power to the load; and connecting the charging terminated battery pack to the bus when the voltage difference between the battery pack whose charging has been terminated and the battery pack whose power is being supplied is less than a preset threshold. In response to the charging termination situation when the non-communication power supply fails, the circulating current protection operation includes: stopping the charging of the battery pack and keeping it isolated from the bus; restoring bidirectional conduction of the non-tested battery pack; charging the battery pack whose charging has been terminated through the charging and discharging bypass circuit; and connecting the bus when the difference between the voltage of the battery pack whose charging has been terminated and the bus voltage is less than a preset threshold.

[0013] The present invention also provides a remote local control device for multiple communication battery packs, comprising: The monitoring module is used to control all battery packs to connect to the bus through their respective fully online main circuit loops in monitoring mode, and to collect the battery pack operating parameters in real time; monitor whether there are any abnormal states in the operating parameters; if so, lock the capacity control function; if not, enter the capacity control operation state. The capacity execution module is used to disconnect the battery pack under test from the fully online main circuit loop during capacity operation, connect the battery pack under test to the charging and discharging bypass circuit, and control the non-battery pack under test to be unidirectionally connected to the bus through its corresponding fully online main circuit loop. The report generation module is used to generate a capacity control report when the capacity control operation is terminated or completed.

[0014] The aforementioned remote capacity control device for multiple communication battery packs, wherein the functions of the monitoring module, capacity control execution module, and report generation module are implemented collaboratively by the following hardware: A fully online unit is connected between the battery pack and the busbar. The fully online unit consists of a normally closed contactor and a diode connected in parallel. A bidirectional charging and discharging unit is connected to the path between the busbar and the fully online unit; the bidirectional charging and discharging unit is a bidirectional DC / DC power module. A lockout switch unit is installed in the path between the battery pack and the fully online unit to perform the switching on and off of the fully online main circuit. The lockout switch unit is an internal contactor group. The integrated acquisition unit is electrically connected to the fully online unit and the interlocking switch unit respectively, and is used to control the opening and closing state of the normally closed contactor and control the interlocking switch unit to connect or disconnect the battery pack from the fully online main circuit circuit.

[0015] The present invention also provides a remote capacity approval system for multiple communication battery packs, including a remote capacity approval platform and a remote capacity approval local control device as described in any of the preceding claims; the remote capacity approval platform is communicatively connected to the remote capacity approval local control device; the remote capacity approval platform includes: The nuclear capacity operation personnel authentication module is used to verify whether nuclear capacity operation personnel have nuclear capacity operation permissions; The power supply structure diagram module is used to display the structure of the communication power supply system and core capacity circuit in the power room, and to display the voltage value, current value, loop current direction and switch status of each branch in real time. The capacity control module is used to issue capacity control instructions to the remote capacity control device when the capacity control personnel have passed identity authentication and there are no abnormal alarms. The capacity information display module is used to display the real-time values, historical values, real-time alarms, and historical alarms of battery voltage, current, internal resistance, and temperature parameters in the form of charts.

[0016] The aforementioned remote capacity verification system for multiple communication battery packs allows verification personnel to log in to the remote capacity verification platform via facial recognition and dual authentication using a username / password. The remote capacity verification platform and the remote capacity verification local control device use an asymmetric national cryptographic algorithm for consistency authentication. After successful authentication, the verification personnel issue capacity verification commands on the remote capacity verification platform.

[0017] The beneficial effects achieved by this invention are as follows: By constructing a fully online main circuit loop and a charging and discharging bypass loop, the battery pack and the bus are always physically connected throughout the entire capacity testing process. This does not change the original circuit structure of the communication power supply, battery, and load, thus achieving fully online capacity testing. It automates and remotely enables battery pack capacity testing, saving labor costs and improving operation and maintenance efficiency.

[0018] In monitoring mode, the battery pack is float-charged online; in capacity-controlled operation mode, the battery pack under test switches to bypass circuit for discharge. Discharge utilizes DC / DC voltage conversion to raise the battery pack voltage to match the actual load discharge, avoiding energy waste caused by traditional dummy load discharge. By real-time monitoring of operating parameters and combining a circulating current protection mechanism, discharge or charging is automatically terminated in case of capacity anomalies, preventing inter-pack circulating currents and current surges caused by voltage differences, ensuring uninterrupted power supply to the load under abnormal conditions. This invention also features full battery data monitoring, capacity-controlled operation execution, and authentication encryption protection functions, achieving safe and reliable remote operation and solving the equipment damage and safety accidents that may be caused by forced grid connection during traditional capacity anomalies. Attached Figure Description

[0019] Figure 1 This is a flowchart of the remote capacity control method of the present invention; Figure 2 This is a schematic diagram of the remote nuclear capacity local control device of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Example

[0021] This embodiment provides a remote capacity assessment method for multiple communication battery packs, including the following steps: Establish a fully online main circuit loop and a charging / discharging bypass loop between the battery pack and the busbar; In monitoring mode, all battery packs are connected to the bus via the fully online main circuit loop to collect battery pack operating parameters in real time; monitor whether there are any abnormal states in the operating parameters; if so, lock the capacity control function; if not, enter the capacity control operation state. During the full-capacity operation, the battery pack under test is disconnected from the fully online main circuit loop, and the battery pack under test is connected to the charging and discharging bypass circuit. At the same time, the non-battery packs under test are controlled to be unidirectionally connected to the bus through their corresponding fully online main circuit loop. If any of the operating parameters of all battery packs is detected to be abnormal during the capacity verification operation, the capacity verification operation will be terminated; a capacity verification report will be generated after the capacity verification operation is terminated or completed.

[0022] The fully online main circuit ensures that the battery pack remains connected to the busbar and does not disconnect during monitoring and capacity control operations. This fully online main circuit consists of a low-resistance normally closed contactor and a voltage-dropping diode connected in parallel, designed to withstand the rated current of the communication power supply for a preset time, such as 30 minutes. The forward voltage drop of the voltage-dropping diode is approximately 0.7V. The normally closed contactor can be remotely controlled by the capacity control device.

[0023] The charge / discharge bypass circuit is used to provide charging and discharging paths for the battery pack under test during the capacity-controlled operation. The charge / discharge bypass circuit consists of a bidirectional charge / discharge module, which is a bidirectional DC / DC power module, such as an isolated DC / DC power module, with bidirectional charging and discharging capabilities and supports hot-swapping. Its configuration is based on the capacity-controlled discharge current of the site, selecting the module's rated current and the number of modules accordingly.

[0024] The operating parameters of the battery pack include battery parameters, power supply parameters, environmental parameters, and communication parameters. Battery parameters include battery voltage, current, temperature, internal resistance, etc.; power supply parameters include input and output voltage, current, power failure status, module status, etc.; environmental parameters include ambient temperature, humidity, smoke detection, etc.; communication parameters include communication link status, message status, etc., as well as hardware and software memory usage, process status, component status, etc.

[0025] In the absence of a capacity control operation plan, the remote capacity control device connects the battery pack to the bus via a fully online main circuit. At this time, the battery pack is in float charging mode, the normally closed contactor is closed, the battery pack is directly connected to the bus, the charging / discharging module is not operating, the battery pack discharge current is close to zero, and the load is powered by the communication power supply.

[0026] Under the monitoring state, the remote capacity testing device collects the aforementioned operating parameters in real time and sends these parameters to the remote capacity testing platform and the local LCD screen. Capacity testing personnel can browse the power supply structure diagram and view real-time and historical data for each monitoring point through the remote capacity testing platform and the local LCD screen. Specific monitoring points include: Battery pack: pack voltage, pack current, individual cell voltage, individual cell current, individual cell internal resistance, individual cell temperature, individual cell communication status, aggregated communication status, overall pack SOC, overall pack SOH, individual cell SOC, etc. Remote capacity measurement device: module output voltage, module output current, internal temperature, operating status, online contactor resistance, contactor status, diode forward voltage, dry contact status, memory utilization, storage utilization, CPU utilization, program status, etc. Communication power supply: AC input voltage, rectifier module output voltage, communication status, module status, etc.; Computer room environment: temperature, humidity, smoke detection, water immersion, etc.

[0027] Personnel with remote capacity verification permissions can log in to the remote capacity verification platform via facial recognition or username / password to complete identity authentication. Before the capacity verification operation, if any abnormal state is detected in any operating parameter, the remote capacity verification platform will lock the capacity verification command issuance function and display a pop-up prompt. At the same time, the remote capacity verification device will refuse to execute any capacity verification command and record the event in the log.

[0028] The abnormal states include, but are not limited to, the alarm contents shown in the table below: Table 2 List of Abnormal Operation Alarms

[0029] When all operating parameters are free of abnormal reports and the personnel performing the capacity verification operation have passed security authentication, the remote capacity verification platform is authorized to issue capacity verification commands. Before issuing the capacity verification command, the remote capacity verification platform and the remote capacity verification device perform consistency authentication using an asymmetric national cryptographic algorithm based on Ukey media. Once authentication is successful, the capacity verification command is issued to the remote capacity verification device.

[0030] The capacity verification instructions include: K / D test, internal resistance test, capacity verification test, IP modification, and device restart. Before executing the capacity verification instructions, capacity verification parameters are configured, including battery pack information, discharge current, discharge duration, single-cell voltage lower limit, and discharge capacity. The K / D test is used to perform functional tests on normally closed contactors and diodes.

[0031] During the capacity testing, only one battery pack can be remotely tested at a time. The process includes, in sequence: inter-pack circulation current monitoring, K / D test, discharge, pre-charge, and float charge.

[0032] The inter-pack circulating current monitoring is a method to prevent mutual charging between battery packs due to voltage differences, which would affect backup time. Inter-pack circulating current monitoring involves monitoring the voltage of different battery packs before capacity approval. If the voltage difference is ≤1V, it is determined that inter-pack circulating current will not occur, and the normally closed contactors of different battery packs are allowed to close. If the voltage difference is >1V, it is determined that inter-pack circulating current will occur, and the normally closed contactor of the battery pack with the lower voltage is kept open.

[0033] The discharge process involves disconnecting the normally closed contactors of all battery banks, connecting the battery bank under test to the charge / discharge bypass circuit. The bidirectional charge / discharge module operates in boost discharge mode, raising the output voltage of the battery bank under test to slightly above the bus voltage, ensuring that the battery bank under test is discharging under a true load. The main circuit of the non-battery banks under test becomes unidirectional, allowing current to flow from the battery to the bus, ensuring that the battery bank under test does not charge other battery banks. When the discharge cutoff condition is met, the discharge ends, and the process transitions to the pre-charging phase.

[0034] The pre-charging process involves keeping the normally closed contactors of all battery packs open, and the bidirectional charge / discharge module switching to a constant current / constant voltage charging state to charge the discharged battery packs. Pre-charging ends when the voltage difference between the previously charged battery pack and other battery packs is ≤1V, and the process transitions to float charging.

[0035] The float charging state involves closing the normally closed contactors of all battery packs, restoring the fully online main circuit connection, and using the communication power supply to float charge all battery packs and supply power to the load.

[0036] In scenarios where multiple communication power supplies are configured within the station, each power supply driving one battery bank, the DC buses of each power supply are interconnected via a bus tie switch. During capacity verification operations, the bus tie switch is closed. In scenarios where one communication power supply drives two battery banks, the bus tie switch does not need to be controlled.

[0037] During capacity testing, if any abnormality is detected in any operating parameter, the capacity testing operation will be immediately terminated, and a circulating current protection procedure will be executed. The circulating current protection involves not immediately connecting the battery to the busbar during capacity testing. Instead, the battery's voltage will wait until the voltage difference between the battery and the busbar voltage or the voltage of other battery banks is less than a preset threshold before connecting it to the fully online main circuit via the busbar, thus avoiding large current surges caused by voltage differences.

[0038] Depending on the different abnormalities in the operating parameters, the circulation protection process can be divided into the following four cases.

[0039] Case 1 is the termination of discharge when the communication power supply fails.

[0040] When a battery bank in the discharge phase terminates its capacity verification due to a power outage during the communication power supply phase, the discharged battery bank is controlled to stop discharging and remain isolated from the bus. The current in the main circuit loop of other non-tested battery banks, which are not under test, returns to a bidirectional conduction state, and the non-tested battery banks supply power to the load. As the voltage of the supplying battery bank decreases, when the voltage difference between the discharged battery bank and the supplying battery bank is less than a preset threshold, such as ≤1V, the normally closed contactor of the discharged battery bank is closed, connecting the discharged battery bank to the bus. All battery banks remain fully online, jointly supplying power to the load.

[0041] Scenario 2 is the termination of discharge when the non-communication power supply fails.

[0042] When the battery pack in the discharge phase terminates its capacity verification due to an abnormality other than a power outage of the communication power supply, the discharged battery pack is controlled to stop discharging and remain isolated from the bus. The main circuit loop of other non-tested battery packs is restored from a unidirectional conduction state to a bidirectional current conduction state; the remote capacity verification device controls the bidirectional charge and discharge module to charge the discharged battery pack by the communication power supply; when the voltage of the discharged battery pack is equivalent to the bus voltage, the normally closed contactor of the discharged battery pack is closed to connect to the bus.

[0043] Scenario 3: Charging terminates when the communication power supply fails.

[0044] When a battery bank undergoing charging terminates its capacity verification due to a communication power outage, the charging process stops, maintaining isolation from the busbar. The main circuit of other non-tested battery banks resumes bidirectional current conduction from unidirectional conduction, and these non-tested battery banks supply power to the load. As the voltage of the supplied battery banks decreases, when the voltage difference between the terminated charging battery bank and the currently supplying battery bank falls below a preset threshold (e.g., ≤1V), the normally closed contactor of the terminated charging battery bank closes, connecting the busbar. All battery banks then return to full online operation, jointly supplying power to the load.

[0045] Case 4: Charging terminates when the non-communication power supply fails.

[0046] When the battery pack undergoing charging terminates its capacity verification process due to an anomaly other than power failure (without loss of communication power), the system stops charging the battery pack and maintains isolation from the bus. The main circuit loops of other non-tested battery packs are restored from unidirectional to bidirectional current conduction. The remote capacity verification device controls the bidirectional charge / discharge module to resume charging the terminated battery pack via the communication power supply. When the voltage of the terminated battery pack equals the bus voltage, the normally closed contactor of the terminated battery pack is closed, connecting it to the bus.

[0047] After the capacity assessment operation is terminated or completed normally, the remote capacity assessment device calculates the health status and actual capacity of the battery pack based on the discharge data and generates a capacity assessment report. The capacity assessment report can be viewed and downloaded through the remote capacity assessment platform or a local LCD screen. Example

[0048] This embodiment provides a remote capacity assessment local control device for multiple groups of communication batteries, used to execute the remote capacity assessment method described in Embodiment 1, including: The monitoring module is used to control all battery packs to connect to the bus through their respective fully online main circuit loops in monitoring mode, and to collect the battery pack operating parameters in real time; monitor whether there are any abnormal states in the operating parameters; if so, lock the capacity control function; if not, enter the capacity control operation state. The capacity execution module is used to disconnect the battery pack under test from the fully online main circuit loop during capacity operation, connect the battery pack under test to the charging and discharging bypass circuit, and control the non-battery pack under test to be unidirectionally connected to the bus through its corresponding fully online main circuit loop. The report generation module is used to generate a capacity control report when the capacity control operation is terminated or completed.

[0049] The functions of the monitoring module, the kernel execution module, and the report generation module are implemented collaboratively by the following hardware: A fully online unit is connected between the battery pack and the busbar. The fully online unit consists of a normally closed contactor and a diode connected in parallel. A bidirectional charging and discharging unit is connected to the path between the busbar and the fully online unit; the bidirectional charging and discharging unit is a bidirectional DC / DC power module. A lockout switch unit is installed on the path between the battery pack and the fully online unit to control the opening and closing of the path. The lockout switch unit is an internal contactor group. The integrated acquisition unit is electrically connected to the fully online unit and the interlocking switch unit respectively, and is used to control the opening and closing state of the normally closed contactor, and to control the interlocking switch unit to connect or disconnect the battery pack from the fully online main circuit.

[0050] The following example uses two battery packs, combined with the attached... Figure 2 The specific structure and operation mode of the remote nuclear capacity local control device are described.

[0051] The number of fully online units is the same as the number of battery packs. Taking two battery packs as an example, the fully online units include a first fully online unit and a second fully online unit, corresponding to the first and second battery packs respectively. Each fully online unit consists of a normally closed contactor and a diode, ensuring that the battery pack and the busbar always maintain a physical connection. The selection of components is based on the rated load current of the communication power supply cabinet, such as 200A, 400A, 600A, 800A, 1000A, etc.

[0052] The bidirectional charging and discharging unit is a bidirectional DC / DC power module, such as an isolated DC / DC power module, which is available in 50A and 100A versions. The number of modules can be configured according to the discharge current requirements. For example, if a 50A module is used, two or four modules can be configured for discharge currents of 100A and 200A, respectively. The modules communicate using the standard Modbus protocol. The bidirectional charging and discharging unit is located on the path between the bus and the fully online unit. Under full-capacity operation conditions, the integrated acquisition unit controls the interlocking switch unit to connect the bidirectional charging and discharging unit to the charging and discharging circuit of the battery pack under test, providing a charging or discharging path for the battery pack under test.

[0053] The interlocking switch unit is an internal contactor group that uses logic control to control single-group capacity verification and capacity status switching. The interlocking switch unit is located on the path between the battery pack and the fully online unit, used to open and close this path. In monitoring mode, the interlocking switch unit keeps the main circuit closed, and the battery pack is directly connected to the bus via the fully online unit. In capacity verification operation mode, the interlocking switch unit disconnects the main circuit of the battery pack under test, switching it to the charging / discharging bypass circuit of the bidirectional charging / discharging unit. The interlocking switch unit receives control commands from the integrated data acquisition unit.

[0054] The integrated acquisition unit is the core unit of the remote capacity control device, responsible for acquisition, calculation, control, configuration, and communication. It uses a domestically produced multi-core CPU, runs a Linux operating system, and has peripheral interfaces including a network port, serial port, DI dry contact, and debug port. The integrated acquisition unit is connected to the first fully online unit, the second fully online unit, and the interlocking switch unit via signal lines, and is used to control the opening and closing status of the normally closed contactor, circuit switching, and capacity control operation procedures.

[0055] In monitoring mode, the integrated acquisition unit controls the interlocking switch unit to maintain the fully online main circuit closed, the normally closed contactor is closed, and the battery pack is bidirectionally connected to the bus through the fully online unit. The integrated acquisition unit collects the operating parameters of the battery pack in real time and monitors whether there are any abnormal states in the operating parameters. If an abnormal state exists, the capacity limit function is locked; if no abnormal state exists, the capacity limit function is entered.

[0056] During capacity testing, the integrated acquisition unit controls the interlocking switch unit to disconnect the fully online main circuit of the battery pack under test, connecting the battery pack to the charging / discharging bypass circuit. The bidirectional charging / discharging unit provides a charging or discharging path for the battery pack under test through the charging / discharging bypass circuit. The normally closed contactor corresponding to the non-tested battery pack is disconnected, allowing the non-tested battery pack to conduct unidirectionally to the bus. If the integrated acquisition unit detects any abnormality in any operating parameter, it controls the interlocking switch unit and the normally closed contactor to terminate the capacity testing and execute the circulating current protection procedure.

[0057] After the capacity assessment operation is terminated or completed normally, the integrated acquisition unit calculates the health status and actual capacity of the battery pack based on the discharge data and generates a capacity assessment report.

[0058] The first and second battery banks are respectively connected to the first and second fully online units of the remote capacity assessment local control device via cables. The online monitoring unit collects parameters such as battery bank voltage, temperature, and internal resistance, and uses the Modbus protocol through a 485 serial port to connect to the integrated acquisition unit of the remote capacity assessment local control device via the protocol aggregation unit. The integrated acquisition unit receives capacity assessment commands from the local LCD screen and the remote capacity assessment platform, and controls the interlocking switch unit to switch between K / D testing, capacity assessment testing, internal resistance testing, etc., via signal lines. It also calculates operating parameters and discharge capacity in real time, and calculates battery evaluation indicators such as SOC and SOH.

[0059] The protocol aggregation unit is also used to extend the remote capacity sensing range, including communication power supply, data center environment, etc., to improve the reliability of remote capacity.

[0060] The integrated acquisition unit transmits battery operation data and battery capacity data to the local LCD screen or remote capacity assessment platform via protocols such as TCP / UDP, DL / T860, Modbus, and 104. Example

[0061] This embodiment provides a remote capacity verification system for multiple communication battery packs, including a remote capacity verification platform and the remote capacity verification local control device described in Embodiment 2.

[0062] The remote capacity approval local control device is communicatively connected to the remote capacity approval platform. The remote capacity approval platform is deployed on a remote server or a local LCD screen as host computer software, used for monitoring, command issuance, and data display during the capacity approval process. The remote capacity approval platform includes: The capacity control personnel authentication module is used to verify whether capacity control personnel have capacity control operation permissions through facial recognition and dual verification of username / password.

[0063] The circuit power supply diagram module is used to display the communication power supply system and core circuit structure in the power room, and to display the voltage and current values ​​of each branch, the direction of the loop current, and the switch status in real time.

[0064] The capacity control module is used to issue capacity verification commands to the remote capacity verification local control device when the capacity verification operator has been authenticated and there are no abnormal alarms. The capacity verification operator can configure capacity verification parameters in the capacity control module, including battery pack information, discharge current, discharge duration, single-cell voltage lower limit, and discharge capacity. The command types for capacity verification include: K / D test, internal resistance test, capacity verification test, IP modification, and equipment restart.

[0065] The battery capacity information display module is used to display real-time values, historical values, real-time alarms, and historical alarms of battery voltage, current, internal resistance, temperature, etc., in the form of bar charts, lists, curves, etc.

[0066] The interface adapter module is used to adapt to the communication protocols of remote capacity local control devices from different manufacturers, including IEC61850, Modbus-TCP, WebService, etc.

[0067] During remote capacity approval operations, the approval personnel log into the system through the identity authentication module of the remote capacity approval platform, confirm the system status through the communication circuit power supply diagram module, adjust the capacity approval parameters and issue capacity approval commands through the capacity approval control module; after receiving the commands, the remote capacity approval local control device executes the capacity approval operation and uploads the operating parameters and capacity approval data in real time; the capacity approval information display module displays the data; after the capacity approval operation is completed, the approval personnel can view and download the capacity approval report through the remote capacity approval platform.

[0068] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0070] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0071] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0072] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A remote capacity assessment method for multiple communication battery packs, characterized in that, include: Establish a fully online main circuit loop and a charging / discharging bypass loop between the battery pack and the busbar; In monitoring mode, all battery packs are connected to the bus via their respective fully online main circuit loops to collect battery pack operating parameters in real time; the operating parameters are monitored for any abnormal states; if any are found, the capacity control function is locked; if none are found, the capacity control operation mode is entered. During the full-capacity operation, the battery pack under test is disconnected from the fully online main circuit loop, and the battery pack under test is connected to the charging and discharging bypass circuit. The non-battery pack under test is controlled to be unidirectionally connected to the bus through its corresponding fully online main circuit loop. If any of the operating parameters of all battery packs is detected to be abnormal during the capacity verification operation, the capacity verification operation will be terminated; a capacity verification report will be generated after the capacity verification operation is terminated or completed.

2. The remote capacity assessment method for multiple communication battery packs according to claim 1, characterized in that, The fully online main circuit consists of a normally closed contactor and a diode connected in parallel. In monitoring mode, the normally closed contactor is closed, and the battery pack is bidirectionally connected to the bus. In capacity operation mode, the normally closed contactor of the battery pack under test is opened, disconnecting the battery pack under test from the fully online main circuit and connecting it to the charging / discharging bypass circuit. The normally closed contactor of the non-battery pack under test is opened, and the non-battery pack is unidirectionally connected to the bus through the diode.

3. The remote capacity assessment method for multiple communication battery packs according to claim 1, characterized in that, The operating parameters are collected by the remote nuclear capacity device, and the operating parameters include battery parameters, power supply parameters, environmental parameters, communication parameters, and the status parameters of the remote nuclear capacity device.

4. The remote capacity assessment method for multiple communication battery packs according to claim 1, characterized in that, After entering the capacity verification operation state, the method further includes receiving a capacity verification instruction, which is one of the following: K / D test, internal resistance test, capacity verification test, IP modification or device restart instruction; wherein, before executing the capacity verification instruction, capacity verification parameters are configured, which include battery pack information, discharge current, discharge duration, single cell voltage lower limit and discharge capacity.

5. The remote capacity assessment method for multiple communication battery packs according to claim 2, characterized in that, Under nuclear capacity operation conditions, the nuclear capacity testing process includes, in sequence: inter-group circulating current monitoring, K / D testing, discharging, pre-charging, and float charging; among which: The inter-group circulating current monitoring is used to prevent mutual charging between battery groups due to voltage differences. The specific method of inter-group circulating current monitoring is as follows: monitor the voltage of different battery groups. If the voltage difference is less than or equal to a preset threshold, inter-group circulating current will not occur, and the normally closed contactors of different battery groups will be closed. If the voltage difference is greater than the preset threshold, the normally closed contactor of the battery group with the lower voltage will be opened. The K / D test is used to perform functional tests on normally closed contactors and diodes; The discharge process involves disconnecting the normally closed contactors of all battery packs and connecting the battery pack under test to the charge / discharge bypass circuit; the battery pack under test is then charged and discharged through the charge / discharge bypass circuit to supply power to the load; when the discharge cutoff condition is met, the discharge ends and the pre-charging phase begins. The pre-charging process involves keeping the normally closed contactors of all battery packs open and charging the battery packs through the charging and discharging bypass circuit. When the voltage difference between the battery packs and other battery packs during the charging process is less than or equal to a preset threshold, the pre-charging ends and the process transitions to the float charging stage. The float charging process in the float charging stage involves closing the normally closed contactors of all battery packs, restoring the connection of the fully online main circuit, and putting all battery packs into float charging mode.

6. The remote capacity assessment method for multiple communication battery packs according to claim 1, characterized in that, After the capacity reduction operation is terminated, a circulating current protection step is also included. The circulating current protection step is used to control the battery pack whose capacity reduction operation has been terminated to remain isolated from the bus. The battery pack whose capacity reduction operation has been terminated is then connected to the bus after the voltage difference between the battery pack whose capacity reduction operation has been terminated and the bus voltage or the voltage difference between the battery pack whose capacity reduction operation has been terminated is less than a preset threshold.

7. The remote capacity assessment method for multiple communication battery packs according to claim 6, characterized in that, The circulating current protection steps are executed according to different termination scenarios of nuclear capacity operations, including: In response to the discharge termination situation of communication power failure, the circulating current protection operation includes: isolating the discharged battery pack from the bus and stopping the discharge; restoring the bidirectional conduction of the non-tested battery pack and supplying power to the load; and connecting the discharged battery pack to the bus when the voltage difference between the discharged battery pack and the battery pack currently supplying power is less than a preset threshold. In response to the discharge termination situation when the non-communication power supply fails, the circulating current protection operation includes: isolating the discharged battery pack from the bus and stopping the discharge; restoring bidirectional conduction to the non-tested battery pack; charging the discharged battery pack through the charging and discharging bypass circuit; and connecting the bus when the difference between the voltage of the discharged battery pack and the bus voltage is less than a preset threshold. In response to the charging termination situation when the communication power supply fails, the circulating current protection operation includes: stopping the charging of the battery pack and keeping it isolated from the bus; restoring bidirectional conduction of the non-tested battery pack and supplying power to the load; and connecting the charging terminated battery pack to the bus when the voltage difference between the battery pack whose charging has been terminated and the battery pack whose power is being supplied is less than a preset threshold. In response to the charging termination situation when the non-communication power supply fails, the circulating current protection operation includes: stopping the charging of the battery pack and keeping it isolated from the bus; restoring bidirectional conduction of the non-tested battery pack; charging the battery pack whose charging has been terminated through the charging and discharging bypass circuit; and connecting the bus when the difference between the voltage of the battery pack whose charging has been terminated and the bus voltage is less than a preset threshold.

8. A remote capacity local control device for multiple sets of communication battery packs, characterized in that, include: The monitoring module is used to control all battery packs to connect to the bus through their respective fully online main circuit loops and collect battery pack operating parameters in real time under monitoring conditions. Monitor the operating parameters for any abnormal states; if any are found, lock the capacity function; if none are found, enter the capacity operation state. The capacity execution module is used to disconnect the battery pack under test from the fully online main circuit loop during capacity operation, connect the battery pack under test to the charging and discharging bypass circuit, and control the non-battery pack under test to be unidirectionally connected to the bus through its corresponding fully online main circuit loop. The report generation module is used to generate a capacity control report when the capacity control operation is terminated or completed.

9. The remote capacity local control device for multiple communication battery packs according to claim 8, characterized in that, The functions of the monitoring module, the kernel execution module, and the report generation module are implemented collaboratively by the following hardware: A fully online unit is connected between the battery pack and the busbar. The fully online unit consists of a normally closed contactor and a diode connected in parallel. A bidirectional charging and discharging unit is connected to the path between the busbar and the fully online unit; the bidirectional charging and discharging unit is a bidirectional DC / DC power module. A lockout switch unit is installed in the path between the battery pack and the fully online unit to perform the switching on and off of the fully online main circuit. The lockout switch unit is an internal contactor group. The integrated acquisition unit is electrically connected to the fully online unit and the interlocking switch unit respectively, and is used to control the opening and closing state of the normally closed contactor and control the interlocking switch unit to connect or disconnect the battery pack from the fully online main circuit circuit.

10. A remote capacity control system for multiple communication battery packs, characterized in that, It includes a remote nuclear capacity platform and a remote nuclear capacity local control device as described in any one of claims 8 to 9; The remote nuclear capacity platform is communicatively connected to the remote nuclear capacity local control device; the remote nuclear capacity platform includes: The nuclear capacity operation personnel authentication module is used to verify whether nuclear capacity operation personnel have nuclear capacity operation permissions; The power supply structure diagram module is used to display the structure of the communication power supply system and core capacity circuit in the power room, and to display the voltage value, current value, loop current direction and switch status of each branch in real time. The capacity control module is used to issue capacity control instructions to the remote capacity control device when the capacity control personnel have passed identity authentication and there are no abnormal alarms. The capacity information display module is used to display the real-time values, historical values, real-time alarms, and historical alarms of battery voltage, current, internal resistance, and temperature parameters in the form of charts.

11. The remote capacity verification system for multiple communication battery packs according to claim 10, characterized in that, Capacity verification personnel log in to the remote capacity verification platform through facial recognition and dual authentication of username / password; the remote capacity verification platform and the remote capacity verification local control device use an asymmetric national cryptographic algorithm for consistency authentication; after successful authentication, the capacity verification personnel issue capacity verification instructions on the remote capacity verification platform.

Images