Unidirectional parallel storage battery capacity checking system

Abstract

The invention provides a one-way parallel storage battery capacity checking system, and relates to the field of battery capacity checking, all parallel battery pack modules are connected in parallel and are used for receiving floating charge provided by a one-way AC / DC module in a normal state and supplying power to a direct current load in a capacity checking state; the one-way AC / DC module is directly connected with a direct-current load, is connected with each parallel battery pack module through the automatic seamless connection module, and is used for converting alternating current into direct current, supplying the direct current to each parallel battery pack module to maintain a floating charge state and providing stable power for the direct-current load; and the automatic seamless connection module is used for keeping a floating charge state of the parallel battery pack module in a normal state, and automatically switching a current path according to the voltage change of the parallel battery pack module in a capacity checking state, so that the high-power diode is switched on, the corresponding parallel battery pack module stably discharges to a direct-current load, and voltage backflow is prevented.

Description

Technical Field

[0001] This application relates to the field of battery capacity verification, and particularly to a unidirectional parallel battery capacity verification system. Background Art

[0002] The DC power supply system is an important part of a substation, and the rationality of its design scheme and the reliability of its operation directly affect the reliability of the substation. Among them, the battery plays a crucial role in the system. Since most of the battery packs in traditional DC power supply systems adopt a series wiring method, once a failure or damage occurs, the entire system will collapse. This connection method will affect the stability and power supply capacity of the entire system when using batteries of different degrees of newness and oldness, and different brands of batteries cannot be used simultaneously. Therefore, it is crucial to use battery capacity verification technology to master the status information of the battery and design a safe and reliable parallel battery topology structure to ensure the safe and stable operation of the system.

[0003] Capacity verification discharge is by far the most effective means recognized to measure the power supply capacity of a battery. For the series-connected battery packs in traditional DC power supply systems, during traditional capacity verification discharge, all batteries must be withdrawn from the DC system. If at this time, there is a power outage in the city power and the standby generator cannot be started normally, it is not conducive to the safety and reliability of the DC system. At the same time, the discharge cycles required for batteries of different capacities are also different. If the battery capacities in the DC system vary greatly, it is particularly time-consuming for manual traditional capacity verification, and it is easy to miss the verification.

[0004] At this time, it is crucial to design an automatic online capacity verification technology that can achieve different frequencies for batteries with different health degrees without withdrawing the batteries from the DC system.

[0005] There are also some automatic online capacity verification technologies in the prior art, but they have the following disadvantages:

[0006] (1) When a single battery in a series battery pack fails, the faulty battery cannot be cut off online individually, which will affect the power supply output of the entire battery pack. Mixing batteries of different degrees of newness and oldness will affect the stable operation of the entire system and the service life of the battery, greatly reducing the convenience of maintenance and operation and maintenance;

[0007] (2) When overhauling, an external standby battery pack needs to be connected. It is impossible to reasonably utilize the discharged power during battery capacity verification and feedback the power back to the DC load, resulting in waste of the original stored energy of the battery, reduced energy utilization rate, and possible consequences such as loss of bus voltage and a significant decrease in the reliability of power supply to the load;

[0008] (3) Low degree of intelligence. For the batteries with faults or abnormal operating states, manual commands are still required to perform the capacity verification operation. The capacity status of abnormal batteries cannot be detected and discovered in a timely manner, and the periodic automatic capacity verification without manual commands cannot be achieved according to the detected battery capacity status. Summary of the Invention

[0009] This application aims to solve at least one of the technical problems in the related art to some extent.

[0010] To this end, the purpose of this application is to propose a unidirectional parallel battery capacity verification system.

[0011] To achieve the above object, an embodiment of this application proposes a unidirectional parallel battery capacity verification system, including: a plurality of parallel battery pack modules, a plurality of automatic seamless connection modules, and a unidirectional AC / DC module, where:

[0012] Each of the parallel battery pack modules is connected in parallel to receive the floating charge provided by the unidirectional AC / DC module in the normal state and supply power to the DC load in the capacity verification state.

[0013] The unidirectional AC / DC module is directly connected to the DC load and is connected to each of the parallel battery pack modules through the automatic seamless connection module, and is used to convert alternating current into direct current, supply each of the parallel battery pack modules to maintain the floating charge state, and provide a stable power supply to the DC load.

[0014] The automatic seamless connection module is used to maintain the floating charge state of the parallel battery pack module in the normal state, automatically switch the current path according to the voltage change of the parallel battery pack module in the capacity verification state, turn on the high-power diode, realize the stable discharge of the corresponding parallel battery pack module to the DC load, and prevent voltage backflow.

[0015] Optionally, each of the automatic seamless connection modules can automatically control the conduction and disconnection of the high-power diode inside according to the voltage change of each parallel battery pack module to realize the independent capacity verification of different parallel battery pack modules without manual control.

[0016] Optionally, the parallel battery pack module includes a battery pack, a charge and discharge unit module, an alarm device module, and a monitoring module, where:

[0017] The battery pack is used to store electrical energy and supply power to the DC load when needed.

[0018] The charge and discharge unit module is used to manage the charging and discharging process of the battery pack and realize step-up discharge according to the capacity verification requirement.

[0019] When the state of the battery pack is abnormal or the capacity is lower than a predetermined threshold, the alarm device module triggers an alarm;

[0020] The monitoring module is used to monitor the temperature and voltage data of the battery pack, and transmit the monitoring data to the main control chip for real-time monitoring and status analysis.

[0021] Optionally, the charge and discharge unit module includes a data acquisition module, a bidirectional DC / DC module, an automatic control module, a timing module, and a main control chip, where:

[0022] The data acquisition module is used to collect the temperature and voltage data of each battery in the battery pack in real time, and transmit the collected data to the main control chip;

[0023] The bidirectional DC / DC module is used to keep the battery in floating charge state under normal conditions, and raise the battery voltage higher than the bus voltage under the capacity verification state to achieve battery discharge;

[0024] The automatic control module has a manual mode and an automatic mode. In the manual mode, a capacity verification instruction is issued manually to control the bidirectional DC / DC module to boost the voltage, thereby realizing capacity verification; in the automatic mode, when the timing module reaches a predetermined time or the data acquisition module detects abnormal data, an instruction is automatically issued, and the main control chip controls the automatic control module to realize automatic capacity verification;

[0025] The timing module is used to preset automatic capacity verification cycles with different frequencies, and the main control chip adjusts the capacity verification frequency according to the detected battery capacity, achieving the effect that the lower the capacity, the higher the capacity verification frequency.

[0026] Optionally, the parallel battery pack module has multiple working states, including normal working state, capacity verification working state, abnormal working state, and automatic working state, where:

[0027] In the normal working state, the data acquisition module collects the battery temperature and voltage data, and the main control chip transmits the data to the monitoring module to achieve real-time monitoring;

[0028] In the capacity verification working state, the monitoring module sends an instruction to the main control chip, and the main control chip controls the automatic control module to control the bidirectional DC / DC module of a certain group of batteries to raise the voltage. After reaching the specified voltage, the voltage relay in the automatic seamless connection module is triggered to switch, realizing stable battery discharge. At the same time, the data acquisition module collects the data of the battery charge and discharge process, and stops discharging when the discharge reaches the specified voltage;

[0029] In the abnormal working state, the data acquisition module collects the abnormal battery temperature and voltage status and transmits them to the main control chip. The main control chip displays the abnormal status on the monitoring module, and at the same time automatically issues a capacity verification instruction to the automatic control module to achieve automatic capacity verification of the battery without any human participation.

[0030] In the automatic working state, different capacity verification cycles are set according to the current capacity range of the battery pack. After the main control chip receives the signal sent by the timing module, the capacity verification operation is automatically started, and the alarm module is triggered when the capacity is lower than a certain threshold.

[0031] Optionally, the parallel battery pack module is further configured to:

[0032] After a certain battery pack finishes capacity verification and discharging, analyze the current battery capacity of this battery pack, and decide whether to enter the automatic working state according to the size of the current battery capacity, so as to realize automatic capacity verification of some battery packs, and at the same time keep some battery packs in the floating charge state.

[0033] Optionally, in the automatic working state, different capacity verification cycles are set according to the current capacity range of the battery pack. After the main control chip receives the signal sent by the timing module, the capacity verification operation is automatically started, and the alarm module is triggered when the capacity is lower than a certain threshold, including:

[0034] If the current capacity range of the battery pack is ≥ 70% and ≤ 80%, the timing module sends a signal to the main control chip every three months according to a preset frequency. After the main control chip receives the signal, it automatically controls the start of the capacity verification operation;

[0035] If the current capacity range of the battery pack is > 60% and < 70%, the timing module sends a signal to the main control chip every one and a half months according to a preset frequency. After the main control chip receives the signal, it automatically controls the start of the capacity verification operation;

[0036] If the current capacity range of the battery pack is ≤ 60%, the main control chip sends a signal to the alarm device to trigger an alarm and automatically cut out the abnormal battery from the system separately for repair or replacement.

[0037] The technical solution provided by the embodiments of the present application at least brings the following beneficial effects:

[0038] (1) A new modular parallel battery pack circuit topology is designed, enabling the battery to withdraw or cut in a single abnormal battery, greatly ensuring the power supply safety and reliability of the DC system, and also enabling online capacity verification of a single battery or multiple batteries without disconnecting from the bus, greatly improving the energy utilization rate.

[0039] (2) An automatic seamless connection module is added, which can automatically prevent the busbar from losing voltage during on-line capacity verification, and at the same time does not increase the extra manual burden.

[0040] (3) A new idea for the on-line capacity verification process is proposed. While detecting abnormal parameter batteries, the system can automatically perform capacity verification without manual instructions in a timely manner, calculate their capacity, and determine whether the batteries need to be automatically capacity-verified periodically without manual instructions after obtaining the battery capacity. This idea automatically performs periodic automatic capacity verification on batteries with poor capacity, greatly reducing the manual burden, eliminating the possibility of manual failure to issue capacity verification instructions in a timely manner, and greatly ensuring the reliability of the power supply system.

[0041] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0043] Figure 1 is a schematic structural diagram of a unidirectional parallel battery capacity verification system provided by an embodiment of the present application;

[0044] Figure 2 is a circuit structure diagram of the automatic seamless connection module provided by an embodiment of the present application;

[0045] Figure 3 is an internal structural schematic diagram of the parallel battery pack module provided by an embodiment of the present application;

[0046] Figure 4 is a flowchart of the mutual relationship of four working states of the parallel battery pack module provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0048] The series battery pack structure of the traditional DC power supply system has significant deficiencies in terms of reliability, intelligence, and energy utilization rate. To address this problem, an embodiment of the present application provides a unidirectional parallel battery capacity verification system. Figure 1 is a schematic structural diagram of a unidirectional parallel battery capacity verification system provided by an embodiment of the present application. As Figure 1As shown in the figure, the system includes multiple parallel battery pack modules, multiple automatic seamless connection modules, and a single-phase AC / DC module.

[0049] In the embodiment of the present application, with reference to Figure 1 , the parallel battery pack modules are connected in parallel to receive the floating charge provided by the single-phase AC / DC module under normal conditions and supply power to the DC load under the capacity verification condition. The single-phase AC / DC module is directly connected to the DC load and is connected to each parallel battery pack module through the automatic seamless connection module, which is used to convert alternating current into direct current to supply each parallel battery pack module to maintain the floating charge state and provide a stable power supply to the DC load; the automatic seamless connection module is used to maintain the floating charge state of the parallel battery pack modules under normal conditions and automatically switch the current path according to the voltage change of the parallel battery pack modules under the capacity verification condition, making the high-power diode conduct, realizing the stable discharge of the corresponding parallel battery pack module to the DC load, and preventing voltage backflow.

[0050] Figure 2 It is the circuit structure diagram of the automatic seamless connection module provided by the embodiment of the present application.

[0051] As Figure 2 shown, the automatic seamless connection module consists of an electromagnetic voltage relay (KV), a normally closed contactor (KM), and a high-power diode.

[0052] Among them, the electromagnetic voltage relay (KV) is connected in series with the normally closed contact to detect voltage changes; the normally closed contactor (KM) is connected in series with the normally closed contact of the voltage relay to control the switch of the current path; the high-power diode is connected in parallel with the combination of the relay and the contactor.

[0053] In the embodiment of the present application, during normal operation, the voltage remains normal. At this time, the voltage of the coil of the voltage relay is not sufficient to generate magnetic force, so its normally closed contact remains conducting, the high-power diode is short-circuited, and the current does not flow through the diode to maintain the floating charge state of the storage battery. When the system enters the capacity verification state, the voltage rises. When it reaches the predetermined voltage, the coil in the voltage relay is energized to generate sufficient magnetic force, causing the normally closed contactor to open, and the current flows through the high-power diode. At this time, the high-power diode connects the battery pack and the DC load, which can prevent voltage backflow and at the same time discharge the capacity of the storage battery through the DC load to increase the energy utilization rate. When the capacity verification ends, the voltage drops, and the coil of the voltage relay cannot generate enough magnetic force to open the normally closed contactor, and the normally closed contactor maintains its original conducting state, and the high-power diode is short-circuited. This module can realize the function of automatically turning on and off the high-power diode according to the voltage magnitude at the battery terminal during capacity verification without manual control.

[0054] In addition, each automatic seamless connection module can also automatically control the conduction and disconnection of high-power diodes inside it according to the changes in the terminal voltages of each parallel battery pack module, so as to achieve the independent capacity verification of different parallel battery pack modules without manual control.

[0055] Figure 3 FIG. is a schematic diagram of the internal structure of the parallel battery pack module provided by the embodiment of the present application.

[0056] As Figure 3 shown, the parallel battery pack module includes a battery pack, a charge and discharge unit module, an alarm device module, and a monitoring module.

[0057] Among them, the battery pack is used to store electric energy and supply power to the DC load when needed; the charge and discharge unit module is used to manage the charging and discharging processes of the battery pack and achieve boost discharge according to the capacity verification requirements; the alarm device module triggers an alarm when the state of the battery pack is abnormal or the capacity is lower than a predetermined threshold; the monitoring module is used to monitor the temperature and voltage data of the battery pack and transmit the monitoring data to the main control chip for real-time monitoring and status analysis.

[0058] In addition, as Figure 3 shown, the charge and discharge unit module further includes a data acquisition module, a bidirectional DC / DC module, an automatic control module, a timing module, and a main control chip.

[0059] In the embodiment of the present application, the data acquisition module is used to collect the temperature and voltage data of each battery in the battery pack in real time and transmit the collected data to the main control chip.

[0060] The bidirectional DC / DC module is used to keep the battery in a floating charge state under normal conditions and raise the battery voltage higher than the bus voltage to achieve battery discharge under the capacity verification state.

[0061] The automatic control module has a manual mode and an automatic mode. Among them, in the manual mode, a capacity verification instruction is manually issued to control the bidirectional DC / DC module to boost the voltage, so as to achieve capacity verification; in the automatic mode, when the timing module reaches a predetermined time or the data acquisition module detects abnormal data, an instruction is automatically issued, and the main control chip controls the automatic control module to achieve automatic capacity verification.

[0062] The timing module is used to preset automatic capacity verification cycles with different frequencies, and the main control chip adjusts the capacity verification frequency according to the detected battery capacity, achieving the effect that the lower the capacity, the higher the capacity verification frequency, ensuring that the battery capacity status can be monitored automatically and in real time, and replacing batteries with poor health in time. Alarm device module: The alarm work is controlled by the main control chip.

[0063] The main control chip is used to process the data acquisition module and the timing module, control the automatic control module, and realize the mutual connection between the modules.

[0064] In the embodiments of the present application, the parallel battery pack module has multiple working states, including normal working state, capacity verification working state, abnormal working state, and automatic working state. Figure 4 It is a flowchart of the interrelationship of the four working states of the parallel battery pack module provided by the embodiments of the present application.

[0065] In the normal working state, the data acquisition module collects the temperature and voltage data of the storage battery, and the main control chip transmits the data to the monitoring module to achieve real-time monitoring.

[0066] In the capacity verification working state, the monitoring module sends an instruction to the main control chip, and the main control chip controls the automatic control module to control the bidirectional DC / DC module of a certain group of storage batteries to increase the voltage. After reaching the specified voltage, the voltage relay in the automatic seamless connection module is triggered to switch, realizing stable discharge of the storage battery. At the same time, the data acquisition module collects the data of the charge and discharge process of the storage battery, and stops discharging when the discharge reaches the specified voltage.

[0067] It should be noted that after the capacity verification discharge of a certain group of storage batteries is completed, the current battery capacity of this group of storage batteries is analyzed, and whether to enter the automatic working state is determined according to the size of the current battery capacity, realizing automatic capacity verification of some battery packs, and at the same time, some battery packs maintain the floating charge state, which greatly guarantees the reliability of power supply.

[0068] In the abnormal working state, the data acquisition module collects the abnormal temperature and voltage states of the storage battery and transmits them to the main control chip. The main control chip displays the abnormal state on the monitoring module, and at the same time automatically issues a capacity verification instruction to the automatic control module to realize automatic capacity verification of the storage battery without any human participation, and then determines whether to enter the automatic working state according to the size of the current battery capacity of the storage battery.

[0069] It can be understood that the process of determining whether to enter the automatic working state according to the size of the current battery capacity of the storage battery has been described above, and the present application will not repeat it.

[0070] In the automatic working state, different capacity verification cycles are set according to the current capacity range of the battery pack, and the capacity verification operation is automatically started after the main control chip receives the signal sent by the timing module, and the alarm module is triggered when the capacity is lower than a certain threshold.

[0071] Specifically, if the current capacity range of the battery pack is ≥70% and ≤80%, the timing module sends a signal to the main control chip every three months according to the preset frequency, and the main control chip automatically controls the start of the capacity verification operation after receiving the signal;

[0072] If the current capacity range of the battery pack is > 60% and < 70%, the timing module sends a signal to the main control chip every one and a half months according to the preset frequency. After receiving the signal, the main control chip automatically controls the start of the capacity verification operation;

[0073] If the current capacity range of the battery pack is ≤ 60%, the main control chip sends a signal to the alarm device to trigger an alarm. After a period of time, the abnormal battery is automatically cut out of the system separately for repair or replacement.

[0074] It should be noted that the capacity range of the battery in the automatic working state and the timer control frequency can be adjusted manually according to the specific battery type and working environment, and the present application does not make specific limitations on this.

[0075] In the embodiment of the present application, the addition of the automatic working state can achieve full-automatic capacity verification with different frequencies without manual participation according to different battery health conditions, and realize online and timely detection of batteries in poor condition without manual participation. At the same time, it can be seen from the parallel battery pack module that each battery pack module is separately configured with a discharge unit module inside. And because the battery pack adopts a parallel structure in the system, the present application can achieve the state of capacity verification for some batteries while some batteries are floating charged. At the same time, the online connection or disconnection of the battery can also be realized according to the specific battery state, which greatly guarantees the reliability of the system power supply.

[0076] The embodiment of the present application proposes a modular parallel battery pack design: it can realize the online connection and disconnection of a single battery without affecting the overall power supply, improve the power supply stability of the entire system, and at the same time avoid the waste of human resources and electricity.

[0077] The embodiment of the present application proposes a design for the battery capacity verification discharge current to supply the DC load: when the battery is undergoing capacity verification, it is still connected to the DC side load, and at the same time, the battery capacity is fed back to the DC side load, effectively avoiding power waste and improving energy utilization efficiency.

[0078] The embodiment of the present application proposes a modular automatic online capacity verification technology: by canceling the switch knife switch device on the battery side, adding a device for automatic seamless connection module, and the design of regular automatic capacity verification, more electronic and intelligent automatic capacity verification and discharge are realized, reducing manual operations, optimizing processes, reducing the risk of human errors, improving work efficiency and ensuring system stability. At the same time, through the modular capacity verification design, the capacity verification of a single battery can be realized, while the remaining batteries maintain the floating charge state, improving the power supply stability of the entire system while achieving seamless capacity verification.

[0079] The embodiments of the present application propose a design that can achieve regular or emergency capacitive testing without manual instructions: for storage batteries of different capacities, capacitive testing is performed at regular intervals according to the corresponding preset cycles; for storage batteries with abnormal parameters, capacitive testing can be automatically performed on the abnormal storage batteries without manual instructions when such a situation is detected, so as to perform the next operation.

[0080] It should be understood that various forms of processes shown above can be used, steps can be reordered, added, or deleted. For example, the steps described in the present application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present application can be achieved, and no limitation is imposed herein.

[0081] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A unidirectional parallel battery core capacity system, characterized in that: include: Multiple parallel battery pack modules, multiple automatic seamless connection modules, unidirectional AC / DC modules, including: The parallel battery modules are connected in parallel to receive the floating charge provided by the unidirectional AC / DC module in a normal state and supply power to the DC load in a core capacity state; The unidirectional AC / DC module is directly connected to the DC load and is connected to each of the parallel battery modules through the automatic seamless connection module, and is used to convert AC power into DC power, supply each of the parallel battery modules to maintain a floating charge state, and provide a stable power supply to the DC load; The automatic seamless connection module is used to maintain the floating charge state of the parallel battery module under normal conditions, and automatically switch the current path according to the voltage change of the parallel battery module under the core capacity state, so that the high-power diode is turned on, so as to achieve stable discharge of the corresponding parallel battery module to the DC load and prevent voltage backflow; The parallel battery pack module includes a battery pack, a charge and discharge unit module, an alarm device module, and a monitoring module, wherein: The battery pack is used to store electrical energy and supply power to the DC load when needed; The charging and discharging unit module is used to manage the charging and discharging process of the battery pack and realize boost discharge according to the core capacity requirement; The alarm device module triggers an alarm when the battery pack is in an abnormal state or its capacity is lower than a predetermined threshold; The monitoring module is used to monitor the temperature and voltage data of the battery pack, and transmit the monitoring data to the main control chip for real-time monitoring and status analysis; The charging and discharging unit module includes a data acquisition module, a bidirectional DC / DC module, an automatic control module, a timing module and a main control chip, wherein: The data acquisition module is used to collect the temperature and voltage data of each battery in the battery pack in real time, and transmit the collected data to the main control chip; The bidirectional DC / DC module is used to maintain the battery in a floating charge state under normal conditions, and to increase the battery voltage to a level higher than the bus voltage to achieve battery discharge under a core capacity state; The automatic control module has a manual mode and an automatic mode. In the manual mode, a capacity control instruction is manually issued to control the voltage boost of the bidirectional DC / DC module, thereby realizing capacity control. In the automatic mode, when the timing module reaches a predetermined time or the data acquisition module detects abnormal data, an instruction is automatically issued, and the main control chip controls the automatic control module to realize automatic capacity control. The timing module is used to pre-set automatic capacity verification cycles of different frequencies, and the main control chip adjusts the capacity verification frequency according to the detected battery capacity, so as to achieve the effect that the lower the capacity, the higher the capacity verification frequency.

2. The system according to claim 1, characterized in that Each of the automatic seamless connection modules can automatically control the conduction and disconnection of its internal high-power diode according to the change of the terminal voltage of each parallel battery pack module, so as to realize the independent core capacity of different parallel battery pack modules without manual control.

3. The system according to claim 2, characterized in that The parallel battery pack module has multiple working states, including normal working state, core capacity working state, abnormal working state and automatic working state, wherein: Under normal working conditions, the data acquisition module collects battery temperature and voltage data, and the main control chip transmits the data to the monitoring module to achieve real-time monitoring; In the core capacity working state, the monitoring module sends instructions to the main control chip, and the main control chip controls the automatic control module to control the bidirectional DC / DC module of a certain group of batteries to increase the voltage. After reaching the specified voltage, the voltage relay in the automatic seamless connection module is triggered to switch, so as to achieve stable discharge of the battery. At the same time, the data acquisition module collects data of the battery charging and discharging process, and stops discharging when the discharge reaches the specified voltage. In an abnormal working state, the data acquisition module collects abnormal battery temperature and voltage status and transmits them to the main control chip. The main control chip displays the abnormal status on the monitoring module and automatically issues a capacity verification instruction to the automatic control module, thereby realizing automatic capacity verification of the battery without human intervention. In the automatic working state, different capacity checking cycles are set according to the current capacity range of the battery pack, and the capacity checking operation is automatically started after the main control chip receives the signal sent by the timing module, and the alarm module is triggered when the capacity is lower than a certain threshold.

4. The system according to claim 3, characterized in that The parallel battery pack module is also used for: When a battery pack is discharged, the current battery capacity of the battery pack is analyzed, and whether to enter the automatic working state is determined according to the current battery capacity, so as to achieve the effect of automatic capacity check of some battery packs while maintaining floating charge state of some battery packs.

5. The system according to claim 4, characterized in that In the automatic working state, different capacity checking cycles are set according to the current capacity range of the battery pack, and the capacity checking operation is automatically started after the main control chip receives the signal sent by the timing module, and the alarm module is triggered when the capacity is lower than a certain threshold, including: If the current capacity range of the battery pack is ≥70% and ≤80%, the timing module sends a signal to the main control chip every three months according to a preset frequency, and the main control chip automatically controls and starts the capacity verification operation after receiving the signal; If the current capacity range of the battery pack is greater than 60% and less than 70%, the timing module sends a signal to the main control chip every half month according to a preset frequency, and the main control chip automatically controls and starts the capacity-limiting operation after receiving the signal; If the current capacity range of the storage battery pack is ≤60%, the main control chip sends a signal to the alarm device, triggering an alarm and automatically cutting the abnormal battery out of the system for repair or replacement.

Images