Remote capacity checking method, system and equipment for storage battery

Abstract

The invention discloses a storage battery remote capacity checking method, system and equipment, and the method, system and equipment are executed through a remote capacity checking main control module in a storage battery remote capacity checking system, the remote capacity checking main control module establishes communication with a remote management platform, and is connected with an inversion compensation grid-connected module in the storage battery remote capacity checking system; comprising the following steps: controlling a storage battery to discharge a direct-current electricity load based on a capacity checking discharge instruction issued by a remote management platform; acquiring an actually measured current value in the discharging process of the storage battery, and determining a current difference value between the actually measured current value and the reference current value; if the absolute value of the current difference value is greater than a preset threshold value, the storage battery is discharged through an inversion compensation grid-connected module for current compensation; when it is detected that the discharge end condition of the storage battery is met, checking the capacity of the storage battery to obtain a capacity checking result of the storage battery; the discharge current of the storage battery can be stably maintained in the precision range of the reference current value in the storage battery capacity checking process so as to meet the relevant regulation requirements of capacity checking discharge of the storage battery.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method, system and device for remotely verifying the capacity of a battery. Background Art

[0002] At present, new technologies such as the Internet of Things, industrial automation vision systems, robotics, and artificial intelligence are widely used in substations to accelerate their digital evolution. The DC power system is an important part of the substation, providing working voltage for the DC power-consuming equipment in the substation. Batteries, as the backup power supply of the DC power system, are one of the most core components of the DC power system. They not only provide emergency power, but also participate in many control and protection functions. If the battery performance is poor or fails, devices such as relay protection may not work properly, thereby increasing the risk of small or even large-scale power outages, causing great inconvenience to people's lives or economic damage. Therefore, online monitoring and remote capacity verification of the batteries in the DC system of the substation and continuous improvement of their digital level are important measures to ensure the safe, stable and reliable operation of the entire power grid.

[0003] At present, the capacity verification of substation batteries is mainly carried out manually, which requires operation and maintenance personnel and inspection personnel to arrive at the substation site for capacity verification. During capacity verification, a group of spare batteries must be connected to the DC system or the DC system operation mode must be adjusted, and then the batteries to be tested must be removed from the DC system for manual charge and discharge tests. However, most of the existing capacity verification and discharge technologies do not meet the benchmark battery capacity verification and discharge current requirements. Summary of the invention

[0004] The present invention provides a method, system and device for remote battery capacity checking, so as to solve the problem in the prior art that the discharge of battery capacity checking does not meet the reference current requirement.

[0005] In a first aspect, an embodiment of the present invention provides a remote capacity control method for a battery, which is executed by a remote capacity control main control module in a remote capacity control system for a battery, wherein the remote capacity control main control module establishes communication with a remote management platform, wherein the remote capacity control system for a battery further includes an inverter compensation grid-connected module, wherein the remote capacity control main control module is connected to the inverter compensation grid-connected module, and the execution steps of the remote capacity control main control module include:

[0006] Based on the nuclear capacity discharge instruction issued by the remote management platform, the battery is controlled to discharge to the DC power load through the system bus;

[0007] Obtaining a measured current value during the discharge process of the battery, and determining a current difference between the measured current value and a reference current value;

[0008] If the absolute value of the current difference is greater than a preset threshold, current compensation is performed on the battery discharge through the inverter compensation grid-connected module so that the current difference between the measured current value after compensation and the reference current value is within a set error range;

[0009] When it is detected that the battery discharge end condition is met, the battery capacity verification is performed to obtain the battery capacity verification result.

[0010] Optionally, the battery remote capacity verification system further includes a charging control module, which, after detecting that the battery discharge end condition is met, further includes:

[0011] Based on the charging instruction issued by the remote management platform, the silicon buck unit in the charging control module is controlled to be put into circuit to prevent the DC charger from directly charging the battery, and the inverter grid-connected compensation module is controlled to perform three-stage charging on the battery.

[0012] Optionally, if the absolute value of the current difference is greater than a preset threshold, controlling the inverter compensation grid-connected module to perform current compensation on the battery discharge, including:

[0013] If the current difference is less than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module reduces the input current through the PID proportional-integral-differential control technology, and the reduced current value is the absolute value of the current difference;

[0014] If the current difference is greater than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module increases the input current through the PID proportional-integral-differential control technology, and the increased current value is the absolute value of the current difference;

[0015] The input current is a compensation current for current compensation of the battery discharge.

[0016] In a second aspect, an embodiment of the present invention provides a battery remote capacity system, characterized in that it includes: a battery and a remote capacity main control module, and also includes: an inverter grid-connected compensation module connected to the remote capacity main control module and the battery;

[0017] The remote core capacity main control module specifically includes:

[0018] A control unit, used to control the battery to discharge to the DC power load through the system bus based on the nuclear capacity discharge instruction issued by the remote management platform;

[0019] a determination unit, configured to obtain a measured current value during the discharge process of the battery, and determine a current difference between the measured current value and a reference current value;

[0020] A compensation unit, configured to, if the absolute value of the current difference is greater than a preset threshold, perform current compensation on the battery discharge through an inverter compensation grid-connected module, so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range;

[0021] The capacity verification unit is used to verify the battery capacity and obtain the battery capacity verification result when it is detected that the battery discharge end condition is met.

[0022] Optionally, the battery remote core capacity system further includes a silicon buck module, and the silicon buck module is connected to the remote core capacity main control module;

[0023] The silicon buck module is used to control the use of the line through the remote core capacity main control module when the remote core capacity main control module receives the core capacity discharge instruction, so that the battery discharges to the DC power load through the system bus.

[0024] Optionally, the inverter grid-connected compensation module is specifically used to drive the remote core capacity main control module by adopting PID proportional-integral-differential control technology when the current difference is greater than a preset threshold, so that the inverter grid-connected compensation module adjusts the input current and performs current compensation for the battery discharge;

[0025] The input current is a compensation current for current compensation of the battery discharge.

[0026] Optionally, the battery remote core capacity system also includes a charging control module, which is connected to the charging unit in the remote core capacity main control module; the charging unit is used to control the silicon buck unit in the charging control module to be put into line use based on the charging instructions issued by the remote management platform, so as to prevent the DC charger from directly charging the battery, and control the inverter grid-connected compensation module to perform three-stage charging on the battery.

[0027] Optionally, the battery remote capacity verification system further includes a battery monitoring module, and the battery monitoring module is connected to the remote capacity verification main control module;

[0028] The battery monitoring module is used to monitor the battery operating status data and send it to the remote core capacity main control module;

[0029] The operating status data includes at least one of the following: battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, and battery cell temperature.

[0030] In a third aspect, an embodiment of the present invention provides an electronic device, including: a human-computer interaction terminal, and also including: a battery remote capacity verification system according to any embodiment of the present invention;

[0031] The human-computer interaction terminal is used to receive a capacity discharge instruction issued by a remote management platform or receive a capacity discharge instruction input through a displayed human-computer interaction interface, and transmit the capacity discharge instruction to the battery remote capacity check system, so that the battery remote capacity check system executes the battery remote capacity check method described in any embodiment of the present invention.

[0032] Optionally, the device further includes: an emergency stop button, used to stop the operation of the battery remote capacity control system by triggering the emergency stop button.

[0033] The technical solution of the embodiment of the present invention is executed by a remote core capacity main control module in a remote core capacity system of a battery, the remote core capacity main control module establishes communication with a remote management platform, the remote core capacity system of the battery also includes an inverter compensation grid-connected module, the remote core capacity main control module is connected to the inverter compensation grid-connected module, and the execution steps of the remote core capacity main control module include: based on the core capacity discharge instruction issued by the remote management platform, controlling the battery to discharge to the DC power load through the system bus; obtaining the measured current value during the discharge process of the battery, and determining the current difference between the measured current value and the reference current value; if the absolute value of the current difference is greater than a preset threshold, The compensation grid-connected module performs current compensation on the battery discharge so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range; when it is detected that the battery discharge end condition is met, the battery capacity is verified to obtain the battery verification result, which solves the problem in the prior art that the battery verification capacity discharge does not meet the reference current requirement, ensures that during the battery verification capacity process, the battery discharge current can be stably maintained within the accuracy range of the reference current value to meet the relevant regulations for battery verification capacity discharge, realizes remote automatic control of battery verification capacity discharge test and maintenance, saves human resources, and improves the efficiency of battery verification capacity.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1A flowchart of a method for remote battery capacity verification provided in Embodiment 1 of the present invention;

[0037] Figure 2 A schematic diagram of a battery remote capacity verification system provided in Embodiment 2 of the present invention;

[0038] Figure 3 A schematic diagram of a front panel of a silicon buck module provided in Embodiment 2 of the present invention;

[0039] Figure 4 A schematic diagram of a rear panel of a silicon buck module provided in Embodiment 2 of the present invention;

[0040] Figure 5 This is a schematic diagram of the interior of a silicon step-down unit provided in the second embodiment of the present invention;

[0041] Figure 6 A working principle diagram of a silicon buck module in daily working mode provided in the second embodiment of the present invention;

[0042] Figure 7 A working principle diagram of a silicon buck module startup discharge mode provided in the second embodiment of the present invention;

[0043] Figure 8 A schematic diagram of a front panel of an inverter grid-connected compensation module provided in Embodiment 2 of the present invention;

[0044] Fig. 9 A schematic diagram of a rear panel of an inverter grid-connected compensation module provided in the second embodiment of the present invention;

[0045] Fig.10 An internal schematic diagram of an inverter grid-connected compensation module provided in Embodiment 2 of the present invention;

[0046] Fig.11 A working principle diagram of an inverter grid-connected compensation module provided in the second embodiment of the present invention;

[0047] Fig.12 A schematic structural diagram of a remote battery capacity checking device that can be used to implement an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] Embodiment 1

[0051] Figure 1 The flowchart of a method for remote battery capacity control provided in the first embodiment of the present invention is applicable to the case of remote battery capacity control. The method can be executed by a remote capacity control main control module in a remote battery capacity control system. The remote capacity control main control module establishes communication with a remote management platform. The remote battery capacity control system also includes an inverter compensation grid-connected module. The remote capacity control main control module is connected to the inverter compensation grid-connected module. The remote capacity control main control module can be implemented in the form of hardware and / or software. The remote capacity control main control module can be configured in a remote battery capacity control device. Figure 1 As shown, the execution steps of the remote core capacity main control module include:

[0052] S110. Based on the core capacity discharge instruction issued by the remote management platform, control the battery to discharge the DC power load through the system bus.

[0053] Among them, the remote management platform may refer to a management platform where staff can remotely check the capacity of batteries through the Internet of Things or wireless communication technology; the capacity discharge instruction may refer to the instruction used to remotely manage and control the battery pack for capacity testing and performance evaluation; the battery includes a battery cell and a battery pack composed of multiple battery cells; the system bus may refer to a metal conductor with high conductivity, which is mainly used for transmitting and distributing electrical energy; the DC power load may refer to a load device that directly uses a DC power supply and consumes DC power.

[0054] Specifically, the staff can log in to the remote management platform through two-way identity authentication, wherein the two-way identity authentication can refer to the process of mutual verification between the staff and the remote management platform; the verification method through two-way identity authentication can not only confirm the identity of the staff, but also confirm the information of the remote management platform, which greatly enhances the security of the remote capacity of the battery. The capacity discharge instruction can be issued through the remote management platform; illustratively, the staff can click the "battery capacity" button in the remote management platform to control the remote management platform to issue the capacity discharge instruction to the remote capacity master control module in the battery remote capacity system. After receiving the capacity discharge instruction issued by the remote management platform, the remote capacity master control module controls the silicon buck module (standard 35V voltage drop) to be put into line use by the core capacity master control unit, so that the battery terminal voltage (busbar voltage) is higher than the outlet voltage of the silicon buck module, thereby enabling the battery to discharge directly to the DC power load through the system bus. Among them, the silicon buck module is arranged in the battery remote capacity system, and the silicon buck module is connected to the remote capacity master control module.

[0055] In this embodiment, the staff can log in to the remote management platform through two-way identity authentication, and based on the user's clicks and other operations, control the remote management platform to use the Internet of Things LoRa or WAPI wireless communication technology to issue a core capacity discharge instruction to the remote core capacity main control module in the battery remote core capacity system; after the remote core capacity main control module receives the core capacity discharge instruction issued by the remote management platform, the core capacity main control unit controls the silicon buck module to be put into line use, and the silicon buck module can be used to isolate the DC charger to continuously charge the battery, thereby allowing the battery to directly discharge to the DC power load through the system bus; the feasibility and safety of remote battery core capacity are ensured.

[0056] S120, obtaining a current value actually measured during the discharge process of the battery, and determining a current difference between the actually measured current value and a reference current value.

[0057] Among them, the measured current value may refer to the actual discharge current value obtained by real-time monitoring by the current sensor during the discharge process of the battery core capacity; the reference current value may refer to the standard discharge current value of the battery at a 10-hour rate, which may be a standard value set according to the battery capacity.

[0058] Specifically, the battery remote capacity control system also includes a battery monitoring module, which is connected to the remote capacity control module and is used to monitor the battery operation status data and send it to the remote capacity control module; the operation status data includes at least one of the following: battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, battery cell temperature; the Hall sensor in the battery monitoring module can be used to directly monitor the actual discharge current value of the battery pack terminal during the battery discharge process in real time; wherein the measured current value includes the DC power load discharge current value, the inverter dynamic compensation current value and the system self-consumption current value. For example, assuming that the measured current value is , the DC load discharge current value is , the inverter dynamic compensation current value is , the implicit self-consumption current value of the system is ;The reference current value is ;but = (Load)+ (Inverter Dynamic Compensation) + (System self-consumption energy) = (Accuracy: ±2.5% );in, Can be set according to battery capacity; , It can be actually monitored by Hall sensor; The energy consumption of the battery remote core capacity system hardware equipment during operation is a hidden performance loss, which has dynamic fluctuations and cannot be directly determined; Can be based on The reference current value and The measured current value of battery discharge is calculated (Inverter dynamic compensation) Increase or decrease the current value. (system self-consumption), and The measured current value actually includes (load), (Inverter dynamic compensation), (System self-consumption energy) All three parts may fluctuate in real time, but they are ultimately reflected in Therefore, in order to maintain the stability of the system and avoid instability caused by frequent adjustments in transient mutations, small differences, etc., three The final measured current value is calculated by averaging the values ​​(100ms / times) to determine the final measured current value, and the final measured current value is subtracted from the reference current value to obtain the current difference value; for example, the current difference value is obtained every 100ms. value, get , , ,calculate , , The average value ( + + ) / 3= (the final measured current value), and The difference is obtained by subtracting the current.

[0059] In this embodiment, the actual current value measured during the battery discharge process is obtained by a sensor, and a set reference current value is determined according to the battery capacity, and then the actual current value is subtracted from the reference current value to obtain a current difference between the two.

[0060] S130. If the absolute value of the current difference is greater than a preset threshold, current compensation is performed on the battery discharge through an inverter compensation grid-connected module so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range.

[0061] Among them, the preset threshold value may refer to a preset current difference threshold value, such as 0.16A; the inverter compensation grid-connected module may refer to a DC / AC inverter compensation grid-connected module, which can convert the DC power released during the battery core capacity into AC power through grid-connected inversion, and send it back to the AC power grid, thereby avoiding the waste of electric energy and improving the utilization rate of electric energy; it can also charge the battery directly through AC power. In addition, the input current, input voltage, output current, output voltage and other parameters of the DC / AC inverter compensation grid-connected module are controllable, and the remote core capacity master control module can dynamically adjust the input current of the DC / AC inverter compensation grid-connected module through the control protocol to realize the function of automatic compensation of the battery core capacity discharge current. The set error range may refer to ±2.5% .

[0062] Specifically, if the absolute value of the current difference is greater than the preset threshold value of 0.16A, the remote core capacity master control module can drive the inverter compensation grid-connected module to perform adaptive compensation of the battery core capacity discharge current through the CAN-RS485 protocol converter, and dynamically adjust the input current of the inverter compensation grid-connected module. , so that the current difference between the measured current value after compensation and the reference current value is within the set error range, achieving = + + = (Accuracy: ±2.5% ). If the absolute value of the current difference is less than or equal to the preset threshold value 0.16A, that is ≤0.16A, no adjustment compensation is performed. For example, if three The final measured current value is calculated by averaging the values ​​(100ms / times) to determine the final measured current value. The final measured current value is subtracted from the reference current value. The maximum difference will not exceed At the same time, for station batteries with a capacity of 200Ah and above, the accuracy requirement is ±2.5%I10=±0.5A, and 0.48A will not have any impact.

[0063] In this embodiment, if the absolute value of the current difference between the actual current value and the reference current value is greater than a preset threshold value, the input current of the inverter compensation grid-connected module can be adjusted through the remote core capacity main control module to perform current compensation for the battery discharge, so that the current difference between the measured current value and the reference current value after compensation is within the set error range, ensuring that during the battery core capacity process, the battery discharge current can be stably maintained within the accuracy range of I10 to meet the relevant regulations for battery core capacity discharge.

[0064] S140: When it is detected that the battery discharge end condition is met, the battery capacity is verified to obtain the battery capacity verification result.

[0065] The battery discharge end condition may refer to the end of battery discharge when the battery cell terminal voltage drops to a preset voltage threshold; the preset voltage threshold may be determined based on the actual cell cell voltage value. The battery capacity verification result may refer to the actual capacity of the battery and other results.

[0066] For example, if the battery configuration is 104 2V batteries, the normal floating charge output voltage of the DC charger is After the silicon step-down module steps down the voltage by 35V, the output voltage of the silicon step-down module is 234V-35V=199V. When the battery starts to discharge, the normal value of the 2V single battery terminal voltage is higher than 2.20V (the 12V single battery terminal voltage is higher than ), as the battery discharge depth increases, when the battery cell terminal voltage drops to 199V / 104≈1.91V, the battery discharge will no longer continue. Refer to the battery discharge characteristic parameters, according to the 10 hour rate When the battery cell voltage drops to about 1.91V, about 90% of the normal battery capacity is actually discharged. At this time, the battery discharge ends, which can effectively avoid over-discharge and other situations. In practical applications, station batteries are generally charged at a 10-hour rate. Nuclear capacity discharge, for nuclear capacity discharge with a depth less than 90%, can fully meet the nuclear capacity requirements.

[0067] Specifically, the remote capacity verification main control module receives the battery cell voltage value sent by the battery monitoring module and compares it with the preset voltage threshold. When it is detected that the battery cell terminal voltage value drops to the preset voltage threshold, the battery capacity is verified to obtain the battery capacity verification result.

[0068] In this embodiment, it is executed by a remote core capacity main control module in a remote core capacity system of a battery, the remote core capacity main control module establishes communication with a remote management platform, the remote core capacity system of the battery also includes an inverter compensation grid-connected module, the remote core capacity main control module is connected to the inverter compensation grid-connected module, and the execution steps of the remote core capacity main control module include: based on the core capacity discharge instruction issued by the remote management platform, controlling the battery to discharge the DC power load through the system bus; obtaining the measured current value during the discharge process of the battery, and determining the current difference between the measured current value and the reference current value; if the absolute value of the current difference is greater than a preset threshold, the remote core capacity main control module is connected to the inverter compensation grid-connected module through the inverter compensation grid-connected module. The network module performs current compensation on the battery discharge so that the current difference between the actual current value measured after compensation and the reference current value is within the set error range; when it is detected that the battery discharge end condition is met, the battery capacity is verified to obtain the battery capacity verification result; the problem in the prior art that the battery capacity verification discharge does not meet the reference current requirement is solved, and it is ensured that during the battery capacity verification process, the battery discharge current can be stably maintained within the accuracy range of the reference current value to meet the relevant regulations for battery capacity verification discharge, and realize remote automatic control of battery capacity verification discharge test and maintenance, saving human resources and improving the efficiency of battery capacity verification.

[0069] Optionally, the battery remote capacity verification system further includes a charging control module, which, after detecting that the battery discharge end condition is met, further includes:

[0070] Based on the charging instruction issued by the remote management platform, the silicon buck unit in the charging control module is controlled to be put into circuit to prevent the DC charger from directly charging the battery, and the inverter grid-connected compensation module is controlled to perform three-stage charging on the battery.

[0071] Among them, the charging instruction may refer to the instruction for charging the battery; the charging control module may refer to the module for controlling the charging of the battery; the three-stage charging may refer to charging the battery through three stages: constant current charging stage, constant voltage charging stage and floating charging stage.

[0072] Specifically, after detecting that the voltage value of the battery cell terminal drops to the preset voltage threshold, that is, after meeting the battery discharge end condition, the remote management platform sends the corresponding charging instruction to the remote core capacity main control module, and the remote core capacity main control module controls the silicon buck unit (standard 20V voltage drop) in the driving charging control module to be put into line use; the silicon buck unit can be used to isolate the DC charger to charge the battery directly, while the AC / DC rectifier output of the inverter grid-connected compensation module charges the battery in three stages. After charging is completed, the system returns to normal operation.

[0073] In one embodiment, when controlling the bidirectional PCS unit in the inverter grid-connected compensation module to charge the battery, in order to avoid the problems such as backflow caused by the direct connection of the bidirectional PCS unit in the inverter grid-connected compensation module and the DC charger, the charging control module can be set between the output DC side and the DC bus of the bidirectional PCS unit in the inverter grid-connected compensation module. The silicon buck unit in the charging control module can prevent the DC charger from directly charging the battery, and avoid the DC charger from being directly connected to the bidirectional PCS unit in the inverter grid-connected compensation module. In addition, due to the blocking effect of the silicon buck unit in the charging control module, when the inverter grid-connected compensation module charges the battery, the output voltage of the DC charger (i.e., the busbar voltage) is higher than the outlet voltage of the silicon buck unit (i.e., the output terminal voltage of the silicon buck unit), so that the bidirectional PCS unit in the inverter grid-connected compensation module can output DC only for charging the battery; and the DC charger directly supplies power to the DC power load through the system bus; and the battery can be backed up by the silicon buck unit, where the backup can mean that if the contactor used to connect the battery and the bus trips and disconnects, the battery can be connected to the bus through the silicon buck unit, ensuring that the bus will not be powered off.

[0074] In this embodiment, after detecting that the battery discharge termination conditions are met, the remote management platform can issue corresponding charging instructions to the remote core capacity main control module, and the remote core capacity main control module controls the silicon buck unit in the driving charging control module to be put into line use, so as to isolate the DC charger from directly charging the battery, and control the inverter grid-connected compensation module to perform three-stage charging of the battery. By sequentially undergoing the three stages of constant current charging, constant voltage charging and floating charging, the battery can be effectively charged while avoiding the problems of overcharging and undercharging, thereby extending the battery life.

[0075] Optionally, after detecting that the battery discharge end condition is met, the charging control module can also choose to have the DC charger directly charge the battery. After charging is completed, the system returns to normal operation.

[0076] Optionally, if the absolute value of the current difference is greater than a preset threshold, controlling the inverter compensation grid-connected module to perform current compensation on the battery discharge, including:

[0077] If the current difference is less than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module reduces the input current through the PID proportional-integral-differential control technology, and the reduced current value is the absolute value of the current difference;

[0078] If the current difference is greater than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module increases the input current through the PID proportional-integral-differential control technology, and the increased current value is the absolute value of the current difference;

[0079] The input current is a compensation current for current compensation of the battery discharge. PID proportional-integral-differential control technology can refer to adjusting the system output through three control means of proportion, integration and differentiation to achieve the expected control target.

[0080] Specifically, the current difference may refer to the reference current value Subtract the measured current value If the current difference is less than zero, it means that the measured current value Greater than the reference current value , and the absolute value of the current difference is greater than the preset threshold, then the measured current value With the reference current value The difference between them is not within the set accuracy range; in order to make the measured current value Reaching the reference current value The remote core capacity master control module can control the inverter input current of the bidirectional PCS unit in the inverter compensation grid-connected module through the PID proportional-integral-differential control technology. The reduced current value is the absolute value of the current difference, that is , so that the measured current value after reduction With the reference current value The current difference is within the set error range, satisfying = + + = (Accuracy: ±2.5% ). If the current difference is greater than zero, it means that the measured current value Less than the reference current value , and the absolute value of the current difference is greater than the preset threshold, then the measured current value With the reference current value The difference between them is not within the set accuracy range; in order to make the measured current value Reaching the reference current value The remote core capacity master control module can control the inverter input current of the bidirectional PCS unit in the inverter compensation grid-connected module through the PID proportional-integral-differential control technology. Increases, the increased current value is the absolute value of the current difference, that is , so that the measured current value after the increase With the reference current value The current difference is within the set error range, satisfying = + + = (Accuracy: ±2.5% ).

[0081] In this embodiment, the measured current value is determined by judging whether the current difference is less than zero. With the reference current value The measured current value is determined by judging whether the absolute value of the current difference is greater than the preset threshold. With the reference current value If the difference between the two is within the set accuracy range, the remote core capacity main control module needs to use PID proportional-integral-differential control technology to adjust the inverter input current of the bidirectional PCS unit in the inverter compensation grid-connected module. Increase or decrease, ensure that during the battery capacity verification process, the battery discharge current can be stably maintained within the accuracy range of the reference current value, so as to meet the relevant regulations for battery capacity verification and discharge, and realize remote automatic control of battery capacity verification and discharge testing and maintenance.

[0082] Optionally, the battery remote capacity verification system also includes a battery monitoring module, and the remote capacity verification main control module also includes: based on the battery operating status data sent by the battery monitoring module; predicting the state characteristics of the battery at a future time through a time series prediction model to obtain an optimal remaining service life prediction result; and issuing a battery safety warning based on the state characteristics of the battery at a future time and the prediction result.

[0083] Among them, the battery operating status data may include at least one of the following: battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, battery cell temperature; the time series prediction model may be a deep neural network model; the state characteristics at a future moment may refer to the state of the battery at a future moment, for example, an open circuit, "thermal runaway", etc.; the service life prediction result may refer to the time that the battery can continue to be used, for example, a few years or months, etc.

[0084] Specifically, by inputting the battery operating status data sent by the battery monitoring module into the time series prediction model to predict the state characteristics of the battery at future times, it is possible to determine potential safety hazards such as open circuit and "thermal runaway" during the use of the battery and make early warnings. It is also possible to obtain the optimal remaining service life of the battery, provide timely maintenance suggestions, extend its service life, improve the reliability and stability of the system, and provide important guarantees for the safe operation of the power system.

[0085] In this embodiment, based on the battery operating status data sent by the battery monitoring module; the state characteristics of the battery at future times are predicted by a time series prediction model to obtain the optimal remaining service life prediction result; battery safety warnings are performed based on the state characteristics of the battery at future times and the prediction results, so that potential problems can be discovered in time before the battery fails, and timely maintenance suggestions can be provided, thereby extending its service life, improving the reliability and stability of the system, and providing important guarantees for the safe operation of the power system.

[0086] Embodiment 2

[0087] Figure 2 This is a schematic diagram of a battery remote capacity checking system provided in the second embodiment of the present invention. This embodiment is applicable to the case of remote capacity checking of batteries. The system can implement a battery remote capacity checking method provided in any embodiment of the present invention. Figure 2 As shown, a battery remote capacity system 100 provided in an embodiment of the present invention includes: a battery 110 and a remote capacity main control module 120, and also includes: an inverter grid-connected compensation module 130 connected to the remote capacity main control module 120 and the battery 110;

[0088] The remote core capacity main control module 120 specifically includes:

[0089] A control unit, for controlling the battery 110 to discharge the DC power load through the system bus based on the core capacity discharge instruction issued by the remote management platform;

[0090] a determination unit, configured to obtain a measured current value during the discharge process of the battery, and determine a current difference between the measured current value and a reference current value;

[0091] A compensation unit, for performing current compensation on the discharge of the storage battery 110 through the inverter compensation grid-connected module 130 if the absolute value of the current difference is greater than a preset threshold value, so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range;

[0092] The capacity checking unit is used to check the capacity of the battery 110 and obtain the capacity checking result of the battery 110 when it is detected that the discharge end condition of the battery 110 is met.

[0093] In this embodiment, a battery remote core capacity system 100 is constructed, and the system 100 includes: a battery 110 and a remote core capacity main control module 120, and also includes: an inverter grid-connected compensation module 130 connected to the remote core capacity main control module 120 and the battery 110; the remote core capacity main control module 120 specifically includes: a control unit, which is used to control the battery 110 to discharge to the DC power load through the system bus based on the core capacity discharge instruction issued by the remote management platform; a determination unit, which is used to obtain the measured current value of the battery 110 during the discharge process, and determine the current difference between the measured current value and the reference current value; a compensation unit, which is used to, if the absolute value of the current difference is greater than a preset threshold, through the inverter compensation The compensation grid-connected module 130 performs current compensation on the discharge of the battery 110 so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range; the capacity verification unit is used to verify the capacity of the battery 110 and obtain the capacity verification result of the battery 110 when it is detected that the discharge end condition of the battery 110 is met; the problem that the battery capacity verification discharge in the prior art does not meet the reference current requirement is solved, and it is ensured that during the battery capacity verification process, the discharge current of the battery can be stably maintained within the accuracy range of the reference current value to meet the relevant regulations for battery capacity verification discharge, and realize remote automatic control of battery capacity verification discharge test and maintenance, saving human resources and improving the efficiency of battery capacity verification.

[0094] Optionally, the battery remote core capacity system further includes a silicon buck module 140, and the silicon buck module 140 is connected to the remote core capacity main control module 120;

[0095] The silicon step-down module 140 is used to control the use of the line through the remote core capacity main control module 120 when the remote core capacity main control module 120 receives the core capacity discharge instruction, so that the battery discharges to the DC power load through the system bus.

[0096] Specifically, Figure 3 A schematic diagram of a front panel of a silicon buck module provided in Embodiment 2 of the present invention, Figure 4 A schematic diagram of a rear panel of a silicon buck module provided in the second embodiment of the present invention. Figure 5 The internal schematic diagram of a silicon step-down unit provided in the second embodiment of the present invention; Figure 3-5 As shown, the configuration of the step-down silicon module 140 is shown in Table 1;

[0097] Table 1

[0098]

[0099] The silicon step-down module 140 controls the coil of the DC contactor KM1 through an additional intermediate relay. The coil of the DC contactor is connected to the normally closed contact of the intermediate relay and is always connected to the DC220V power supply, and the DC contactor is always in the on state.

[0100] During daily operation, the intermediate relay coil is not energized. When the remote core capacity main control module 120 receives the core capacity discharge instruction, a control signal is sent through the remote core capacity main control module 120 to drive the intermediate relay in the silicon buck module 140 to operate, disconnect its normally closed contacts, and cause the DC contactor coil to lose power and trip. The silicon buck module 140 is put into line use, so that the battery discharges to the DC power load through the system bus.

[0101] In one embodiment, Figure 6 A working principle diagram of a silicon buck module in daily working mode provided in the second embodiment of the present invention, Figure 7 This is a working principle diagram of a silicon buck module startup discharge mode provided in the second embodiment of the present invention. Figure 6 As shown, in the daily working mode, the main contact of the DC contactor KM1 is closed and the DC charger supplies power to the control bus through the contactor KM1 to maintain daily operation. The power supply path is shown by the green dotted line in the figure. At this time, the silicon buck module 140 is bridged by the DC contactor KM1 and does not participate in the work. Figure 7 As shown, the silicon buck module 140 is in the start-up discharge mode: when the remote core capacity main control module 120 receives the core capacity discharge instruction, the remote core capacity main control module sends a control signal to the control unit in the silicon buck module 140, driving the DC contactor KM1 to open, and the silicon buck module 140 is connected in series between the output end of the DC charger and the control bus. After the output voltage of the charger is divided by 35V by the silicon buck module 140, it is much lower than the normal voltage of the battery group, and the battery is discharged to the load. The power supply path is shown as the green dotted line in the figure.

[0102] In this embodiment, the battery remote core capacity system also includes a silicon buck module 140, which is connected to the remote core capacity main control module 120; the silicon buck module 140 is used to control the use of the line through the remote core capacity main control module 120 when the remote core capacity main control module 120 receives the core capacity discharge instruction, and can be used to isolate the DC charger from continuously charging the battery, so that the battery can discharge to the DC power load through the system bus; the feasibility and safety of remote battery core capacity are ensured.

[0103] Optionally, the inverter grid-connected compensation module 130 is specifically used to drive the remote core capacity main control module 120 by adopting PID proportional-integral-differential control technology when the current difference is greater than a preset threshold, so that the inverter grid-connected compensation module 130 adjusts the input current and performs current compensation for the battery discharge;

[0104] The input current is a compensation current for current compensation of the battery discharge.

[0105] Specifically, Figure 8 A schematic diagram of a front panel of an inverter grid-connected compensation module provided in Embodiment 2 of the present invention. Fig. 9 A schematic diagram of a rear panel of an inverter grid-connected compensation module provided in the second embodiment of the present invention. Fig.10 The internal schematic diagram of an inverter grid-connected compensation module provided in the second embodiment of the present invention; Figure 8-10 As shown, the configuration of the inverter grid-connected compensation module 130 is shown in Table 2;

[0106] Table 2

[0107]

[0108] In one embodiment, Fig.11 The working principle diagram of an inverter grid-connected compensation module provided in the second embodiment of the present invention. Fig.11As shown, in the daily working state of the inverter grid-connected compensation module 130: the DC contactor KM1 is always closed, the silicon buck module 140 is directly connected by KM1, and the DC charger supplies power to the bus KM+ through the contactor KM1 and float charges the battery. The output switch Kw2 is normally closed, the input and output contactors KM2 and KM3 of the inverter grid-connected compensation module 130 are in the open state, and the inverter grid-connected compensation module 130 does not work. When the nuclear capacity discharge state is started: the remote nuclear capacity master control module 120 controls the inverter grid-connected compensation module 130 contactors KM2 and KM3 to close, and the silicon buck module 140 contactor KM1 to open, the inverter grid-connected compensation module 130 is started for hot standby, and after KM1 trips, the silicon buck module 140 (Qd1) is connected in series between the DC charger output and the bus KM+ (Ub=Ua-35V). At this time, the battery terminal voltage is higher than the silicon buck module 140 outlet voltage (Uc=Ud>Ub), and the battery discharges to the DC load. As the discharge time goes by, the battery terminal voltage, that is, the bus KM+ voltage, gradually decreases, and the load current will fluctuate. According to the actual discharge current I0 and DC load current I1 of the detected battery received in real time by the remote core capacity main control module 120, the current difference between the measured current value and the reference current value is determined; when the remote core capacity main control module 120 detects that the absolute value of the current difference between the measured current value I0 and the reference current value I10 is greater than the preset threshold, the remote core capacity main control module 120 automatically controls the DC / AC inverter grid-connected compensation module 130 through RS485-CAN coordination, and adopts PID proportional-integral-differential control technology to automatically adjust the bidirectional PCS unit inverter input current value I2 to compensate for the battery discharge, so as to maintain the battery constant current discharge at I10.

[0109] In this embodiment, the inverter grid-connected compensation module 130 is specifically used to drive the remote core capacity main control module 120 using PID proportional-integral-differential control technology when the current difference is greater than a preset threshold value, so that the inverter grid-connected compensation module 130 adjusts the input current and performs current compensation on the battery discharge; wherein the input current is a compensation current for current compensation for the battery discharge; and ensures that during the battery core capacity process, the battery discharge current can be stably maintained within the accuracy range of the reference current value to comply with the relevant regulations for battery core capacity discharge, thereby realizing remote automatic control of battery core capacity discharge testing and maintenance, saving human resources, and improving the efficiency of battery core capacity.

[0110] Optionally, the battery remote core capacity system also includes a charging control module 150, which is connected to a charging unit in the remote core capacity main control module 120; the charging unit is used to control the silicon buck unit in the charging control module 150 to be put into line use based on the charging instructions issued by the remote management platform, so as to prevent the DC charger from directly charging the battery, and control the inverter grid-connected compensation module 130 to perform three-stage charging on the battery.

[0111] Specifically, when the remote core capacity main control module 120 receives the charging instruction issued by the remote management platform, the remote core capacity main control module 120 controls the silicon buck unit (standard 20V voltage drop) in the driving charging control module 150 to be put into line use; the charging control module 150 is arranged between the output DC side and the DC bus of the bidirectional PCS unit in the inverter grid-connected compensation module, so the silicon buck unit in the charging control module 150 can be used to isolate the DC charger to charge the battery directly, and the AC / DC rectifier output of the inverter grid-connected compensation module 130 performs three-stage charging on the battery. After charging, the system returns to the normal operation state. The DC power load can be directly powered by the DC charger through the system bus.

[0112] In this embodiment, the battery remote core capacity system also includes a charging control module 150, and the charging control module 150 is connected to the charging unit in the remote core capacity main control module 120; the charging unit is used to control the silicon buck unit in the charging control module 150 to be put into line use based on the charging instruction issued by the remote management platform, so as to prevent the DC charger from directly charging the battery, and control the inverter grid-connected compensation module 130 to perform three-stage charging on the battery. By sequentially undergoing the three stages of constant current charging stage, constant voltage charging stage and floating charging stage, the battery can be effectively charged, while avoiding the problems of overcharging and undercharging, thereby extending the battery life.

[0113] Optionally, the remote core capacity main control module 120 can also control the silicon buck unit in the charging control module 150 according to the charging instructions issued by the remote management platform, drive the DC contactor KM1 in the silicon buck unit to close, and restore the DC charger to supply power to the control bus KM through the closed contactor and charge the battery.

[0114] Optionally, the battery remote capacity control system further includes a battery monitoring module 160, and the battery monitoring module 160 is connected to the remote capacity control main control module 120;

[0115] The battery monitoring module 160 is used to monitor the battery operation status data and send it to the remote core capacity main control module;

[0116] The operating status data includes at least one of the following: battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, and battery cell temperature.

[0117] The configuration in the battery monitoring module 160 may include a battery cell acquisition unit, at least two Hall sensors, a voltage transmitter, and a battery pack terminal convergence unit.

[0118] In this embodiment, the battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, battery cell temperature and other operating status data are monitored in real time according to the configuration in the battery monitoring module 160, and sent to the remote core capacity main control module 120. The remote core capacity main control module 120 performs corresponding data processing according to the received battery operating status data and maintains the battery remote core capacity.

[0119] Embodiment 3

[0120] Fig.12 The schematic diagram of the structure of a battery remote capacity check device that can be used to implement the embodiment of the present invention is shown. The battery remote capacity check device 10 comprises: a human-computer interaction terminal, and also comprises: a battery remote capacity check system according to any embodiment of the present invention;

[0121] The human-computer interaction terminal is used to receive a capacity discharge instruction issued by a remote management platform or receive a capacity discharge instruction input through a displayed human-computer interaction interface, and transmit the capacity discharge instruction to the battery remote capacity check system, so that the battery remote capacity check system executes the battery remote capacity check method described in any embodiment of the present invention.

[0122] Optionally, the device also includes: an emergency stop button, used to stop the operation of the battery remote capacity control system by triggering the emergency stop button.

[0123] like Fig.12 As shown, the battery remote capacity control device 10 includes a human-machine interface (human-machine interaction terminal), an emergency stop button 11, an inverter compensation grid-connected module 12, a remote capacity control module 13, a silicon buck module 14, a charging control module 15, a cabinet front door 16, a cabinet front door lock 17, and a cabinet front baffle 18. The remote capacity control module 13 also includes at least one controller, and a memory connected to the at least one controller, such as a read-only memory (ROM), a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one controller, and the computer program is executed by the at least one controller so that the at least one controller can execute the battery remote capacity control method provided by the present invention.

[0124] The controller can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for the operation of the remote core capacity main control module 13 can also be stored. The controller, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0125] Multiple components in the remote core capacity main control module 13 are connected to the I / O interface, including: input units, such as keyboards, mice, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network cards, modems, wireless communication transceivers, etc. The communication unit allows the remote core capacity main control module 13 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunication networks.

[0126] The controller may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of controllers include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSP), and any appropriate processors, controllers, microcontrollers, etc. The controller executes the various methods and processes described above, such as the method for remote battery capacity control.

[0127] In some embodiments, the battery remote capacity method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit. In some embodiments, part or all of the computer program can be loaded and / or installed on the remote capacity main control module 13 via a ROM and / or a communication unit. When the computer program is loaded into the RAM and executed by the controller, one or more steps of the battery remote capacity method described above can be executed. Alternatively, in other embodiments, the controller can be configured to execute the battery remote capacity method by any other appropriate means (for example, by means of firmware).

[0128] Various embodiments of the systems and techniques described above herein may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard parts (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0129] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0130] In the context of the present invention, a computer-readable storage medium stores computer instructions, which are used to implement the battery remote capacity method provided by the present invention when the processor executes. A computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the above. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media may include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0131] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a cathode ray tube (CRT) or a liquid crystal display (LCD monitor)) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which the user may provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0132] The systems and techniques described herein may be implemented in a computing system that includes a backend component (e.g., as a data server), or a computing system that includes a middleware component (e.g., an application server), or a computing system that includes a frontend component (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include: a Local Area Network (LAN), a Wide Area Network (WAN), a blockchain network, and the Internet.

[0133] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and virtual private servers (VPS) services.

[0134] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0135] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for remote battery capacity verification, characterized in that: The remote core capacity main control module in the battery remote core capacity system is executed, and the remote core capacity main control module establishes communication with the remote management platform. The battery remote core capacity system also includes an inverter compensation grid-connected module, and the remote core capacity main control module is connected to the inverter compensation grid-connected module. The execution steps of the remote core capacity main control module include: Based on the nuclear capacity discharge instruction issued by the remote management platform, the battery is controlled to discharge to the DC power load through the system bus; Obtaining a measured current value during the discharge process of the battery, and determining a current difference between the measured current value and a reference current value; If the absolute value of the current difference is greater than a preset threshold, current compensation is performed on the battery discharge through the inverter compensation grid-connected module so that the current difference between the measured current value after compensation and the reference current value is within a set error range; When it is detected that the battery discharge end condition is met, the battery capacity verification is performed to obtain the battery capacity verification result.

2. The method according to claim 1, characterized in that The battery remote capacity verification system further includes a charging control module, which, after detecting that the battery discharge end condition is met, further includes: Based on the charging instruction issued by the remote management platform, the silicon buck unit in the charging control module is controlled to be put into circuit to prevent the DC charger from directly charging the battery, and the inverter grid-connected compensation module is controlled to perform three-stage charging on the battery.

3. The method according to claim 1, characterized in that If the absolute value of the current difference is greater than a preset threshold, the inverter compensation grid-connected module is controlled to perform current compensation on the battery discharge, including: If the current difference is less than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module reduces the input current through the PID proportional-integral-differential control technology, and the reduced current value is the absolute value of the current difference; If the current difference is greater than zero and the absolute value is greater than the preset threshold, the inverter compensation grid-connected module increases the input current through the PID proportional-integral-differential control technology, and the increased current value is the absolute value of the current difference; The input current is a compensation current for current compensation of the battery discharge.

4. A battery remote capacity verification system, characterized in that: include: The storage battery and the remote core capacity main control module also include: an inverter grid-connected compensation module connected to the remote core capacity main control module and the storage battery; The remote core capacity main control module specifically includes: A control unit, used to control the battery to discharge to the DC power load through the system bus based on the nuclear capacity discharge instruction issued by the remote management platform; a determination unit, configured to obtain a measured current value during the discharge process of the battery, and determine a current difference between the measured current value and a reference current value; A compensation unit, configured to, if the absolute value of the current difference is greater than a preset threshold, perform current compensation on the battery discharge through an inverter compensation grid-connected module, so that the current difference between the actual current value measured after compensation and the reference current value is within a set error range; The capacity verification unit is used to verify the battery capacity and obtain the battery capacity verification result when it is detected that the battery discharge end condition is met.

5. The system according to claim 4, characterized in that The battery remote core capacity system also includes a silicon buck module, which is connected to the remote core capacity main control module; The silicon buck module is used to control the use of the line through the remote core capacity main control module when the remote core capacity main control module receives the core capacity discharge instruction, so that the battery discharges to the DC power load through the system bus.

6. The system according to claim 4, characterized in that The inverter grid-connected compensation module is specifically used to drive the remote core capacity main control module by adopting PID proportional-integral-differential control technology when the current difference is greater than a preset threshold, so that the inverter grid-connected compensation module adjusts the input current and performs current compensation for the battery discharge; The input current is a compensation current for current compensation of the battery discharge.

7. The system according to claim 4, characterized in that The battery remote core capacity system also includes a charging control module, which is connected to the charging unit in the remote core capacity main control module; the charging unit is used to control the silicon buck unit in the charging control module to be put into line use based on the charging instruction issued by the remote management platform, so as to prevent the DC charger from directly charging the battery, and control the inverter grid-connected compensation module to perform three-stage charging on the battery.

8. The system according to claim 4, characterized in that The battery remote capacity verification system also includes a battery monitoring module, which is connected to the remote capacity verification main control module; The battery monitoring module is used to monitor the battery operating status data and send it to the remote core capacity main control module; The operating status data includes at least one of the following: battery pack terminal voltage, battery pack terminal current, battery cell voltage, battery cell internal resistance, and battery cell temperature.

9. A battery remote capacity verification device, characterized in that: include: The human-computer interaction terminal further comprises: a battery remote capacity verification system as described in any one of claims 4 to 8; The human-computer interaction terminal is used to receive a capacity discharge instruction issued by a remote management platform or receive a capacity discharge instruction input through a displayed human-computer interaction interface, and transmit the capacity discharge instruction to the battery remote capacity check system, so that the battery remote capacity check system executes the battery remote capacity check method described in any one of claims 1-3.

10. The device according to claim 9, characterized in that The device further comprises: an emergency stop button, which is used to stop the operation of the battery remote capacity control system by triggering the emergency stop button.

Images