CN115642678A - Charge and discharge management method and device based on distributed bidirectional inverter power supply system - Google Patents
Charge and discharge management method and device based on distributed bidirectional inverter power supply system Download PDFInfo
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Abstract
The invention discloses a charging and discharging management method and a charging and discharging management device based on a distributed bidirectional inverter power supply system, wherein the method comprises the following steps: obtaining current charge and discharge state data based on the plurality of battery data acquisition sensors; transmitting the obtained current charge and discharge state data to the BMS battery management system based on a signal connection; performing a plurality of battery charging and discharging parameter adjustment treatments based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjustment parameter values of a plurality of batteries; and the BMS battery management system controls the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the plurality of batteries. In the embodiment of the invention, the charge and discharge management of the plurality of batteries arranged in a distributed manner by using the BMS battery management system is realized, so that the plurality of batteries have higher safety during charge and discharge and have longer service lives.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a charging and discharging management method and device based on a distributed bidirectional inverter power supply system.
Background
In the distributed bidirectional inverter power system, because a plurality of batteries are arranged in a distributed manner, the charging or discharging of the distributed bidirectional inverter power system in the prior art is carried out in a constant current manner, namely, the distributed bidirectional inverter power system is carried out at constant power from the beginning to the end of the charging or discharging, but because the distributed bidirectional inverter power system is composed of a plurality of batteries arranged in a distributed manner, the performance state of each battery is different, and other differences such as battery brands and the like can exist, the problems of overcharge or overdischarge and the like can exist due to different capacities or different performance states of the plurality of batteries in the charging or discharging process, the service life of one battery can be influenced, corresponding potential safety hazards can be brought to the purchase of one battery, and the working safety problem of the distributed bidirectional inverter power system can be caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a charging and discharging management method and a charging and discharging management device based on a distributed bidirectional inverter power supply system, which realize the charging and discharging management of a plurality of batteries arranged in a distributed manner by utilizing a BMS battery management system, so that the plurality of batteries have higher safety during charging and discharging, and the plurality of batteries have longer service lives; meanwhile, the safety of the distributed bidirectional inverter power supply system during working is ensured.
In order to solve the above technical problems, an embodiment of the present invention provides a charge and discharge management method based on a distributed bidirectional inverter power system, where the distributed bidirectional inverter power system includes a plurality of batteries, a bidirectional inverter, and a BMS battery management system, the batteries are respectively connected in parallel with one end of the bidirectional inverter, the other end of the bidirectional inverter is respectively used for connecting with a commercial power and an output load, and the BMS battery management system is respectively connected to the batteries and the bidirectional inverter through signals; the method comprises the following steps:
obtaining current charge and discharge state data based on the plurality of battery data acquisition sensors;
transmitting the obtained current charge and discharge state data to the BMS battery management system based on a signal connection;
performing charging and discharging parameter adjustment processing on a plurality of batteries in the BMS based on the current charging and discharging state data to obtain charging and discharging adjustment parameter values of the plurality of batteries;
and the BMS battery management system controls the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the plurality of batteries.
Optionally, the current charge-discharge state data includes current charge state data or current discharge state data;
the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power and the credit discharge power of the battery;
the current charging state data comprises the current charging voltage, the current charging current, the current battery temperature, the current battery capacity data, the current charging power and the credit charging power of the battery.
Optionally, the setting-based obtaining of the current charge and discharge state data by the plurality of battery data collecting sensors includes:
and corresponding data acquisition sensors are respectively arranged on corresponding nodes of the plurality of batteries, and the node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired based on the set corresponding data acquisition sensors to obtain the current charging and discharging state data.
Optionally, the transmitting the obtained current charge and discharge state data to the BMS battery management system based on a signal connection includes:
after the current charging and discharging state data are obtained, marking the current charging and discharging state data by using the battery numbers corresponding to the plurality of batteries to obtain marked current charging and discharging state data;
and uploading the marked current charging and discharging state data to the BMS based on the signal connection paths of the plurality of batteries and the BMS.
Optionally, the adjusting the charging and discharging parameters of the plurality of batteries based on the current charging and discharging state data to obtain the charging and discharging adjusting parameter values of the plurality of batteries includes:
inputting the current charging and discharging state data into a digital twin model built in the BMS battery management system to carry out twin simulation processing on each battery in the plurality of batteries so as to obtain a twin simulation result;
and carrying out charging and discharging parameter adjustment processing on the plurality of batteries based on the twin simulation result to obtain charging and discharging adjustment parameter values of the plurality of batteries.
Optionally, the digital twin model is a model constructed in the BMS battery management system in a digital twin network based on technical parameters of each of the number of batteries; the technical parameters comprise battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range and charging power data range.
Optionally, the BMS battery management system controls the bidirectional inverter to perform charge and discharge processing according to the charge and discharge adjustment parameter values of the plurality of batteries, including:
the BMS battery management system generates a control instruction for controlling the bidirectional inverter based on the charging and discharging adjusting parameter values of the plurality of batteries;
and the BMS battery management system issues the control command to the bidirectional inverter and controls the bidirectional inverter to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries based on the control command.
Optionally, the method further includes:
when one end of the bidirectional inverter is connected with the output load, judging whether the output load needs to supply power to the distributed bidirectional inverter power supply system;
if the power supply of the distributed bidirectional inverter power supply system is not needed, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load;
and if the distributed bidirectional inverter power supply system is required to supply power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and obtains current discharge state data based on the battery data acquisition sensors.
Optionally, the method further includes:
when one end of the bidirectional inverter is connected with the commercial power and is charged, the BMS battery management system controls the bidirectional inverter to charge the plurality of batteries which are distributed according to preset charging power, and obtains current charging state data based on the plurality of battery data acquisition sensors.
In addition, the embodiment of the invention also provides a charging and discharging management device based on a distributed bidirectional inverter power supply system, wherein the distributed bidirectional inverter power supply system comprises a plurality of batteries, a bidirectional inverter and a BMS battery management system which are arranged in a distributed manner, the plurality of batteries are respectively connected with one end of the bidirectional inverter in parallel, the other end of the bidirectional inverter is respectively used for being connected with a commercial power and an output load, and the BMS battery management system is respectively connected with the plurality of batteries and the bidirectional inverter in a signal manner; the device comprises:
a data acquisition module: the battery data acquisition sensors are used for acquiring current charge and discharge state data based on the current charge and discharge state data;
the data uploading module: the battery management system is used for transmitting the obtained current charging and discharging state data to the BMS battery management system on the basis of signal connection;
a data adjusting module: the battery management system is used for adjusting a plurality of battery charging and discharging parameters based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjusting parameter values of a plurality of batteries;
a control module: and the BMS battery management system is used for controlling the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the batteries.
In the embodiment of the invention, the charging and discharging management of the plurality of batteries which are distributed by the BMS battery management system is realized, so that the plurality of batteries have higher safety during charging and discharging, and the plurality of batteries have longer service life; meanwhile, the safety of the distributed bidirectional inverter power supply system during working is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a charging and discharging management method based on a distributed bidirectional inverter power supply system in an embodiment of the invention;
fig. 2 is a schematic structural composition diagram of a charging and discharging management device based on a distributed bidirectional inverter power supply system in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a charging and discharging management method based on a distributed bidirectional inverter power system according to an embodiment of the present invention.
As shown in fig. 1, a charge and discharge management method based on a distributed bidirectional inverter power system includes a plurality of batteries, a bidirectional inverter and a BMS battery management system, the batteries are distributed and arranged, the batteries are respectively connected in parallel with one end of the bidirectional inverter, the other end of the bidirectional inverter is respectively connected with a commercial power and an output load, and the BMS battery management system is respectively connected with the batteries and the bidirectional inverter through signals; the method comprises the following steps:
s11: obtaining current charge and discharge state data based on the plurality of battery data acquisition sensors;
in the specific implementation process of the invention, the current charge-discharge state data comprises current charge state data or current discharge state data; the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power and the credit discharge power of the battery; the current charging state data comprises current charging voltage, current charging current, current battery temperature, current battery capacity data, current charging power and limit charging power of the battery.
Further, the setting-based acquisition of current charge and discharge state data by the plurality of battery data acquisition sensors includes: and corresponding data acquisition sensors are respectively arranged on corresponding nodes of the plurality of batteries, and the node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired based on the set corresponding data acquisition sensors to obtain the current charging and discharging state data.
Specifically, the implementation of the charging management method in the present invention needs to be performed in a distributed bidirectional inverter power supply system, which is a hardware carrier for implementing the charging management method; the distributed bidirectional inverter power supply system comprises a plurality of batteries, a bidirectional inverter and a BMS battery management system which are arranged in a distributed manner, wherein the batteries are respectively connected with one end of the bidirectional inverter in parallel, and the other end of the bidirectional inverter is respectively used for being connected with a mains supply and an output load; the method comprises the following steps of entering a charging mode when the other end of a bidirectional inverter is connected with commercial power, and entering a discharging mode when the other end of the bidirectional inverter is connected with an output load; the BMS battery management system is respectively connected with a plurality of batteries and the bidirectional inverter through signals.
The method comprises the steps that corresponding data acquisition sensors are respectively arranged on corresponding nodes of a plurality of batteries, and when the distributed batteries are charged and discharged, node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired through the corresponding data acquisition sensors to obtain current charging and discharging state data; the current charging and discharging state data comprise current charging state data or current discharging state data; the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power, the credit discharge power and the like of the battery; the current charging state data includes a current charging voltage, a current charging current, a current battery temperature, current battery capacity data, current charging power, credit charging power, and the like of the battery.
S12: transmitting the obtained current charge and discharge state data to the BMS battery management system based on a signal connection;
in a specific implementation process of the present invention, the uploading the obtained current charge and discharge state data to the BMS battery management system based on a signal connection includes: after the current charging and discharging state data are obtained, marking the current charging and discharging state data by using the battery numbers corresponding to the plurality of batteries to obtain marked current charging and discharging state data; and uploading the marked current charging and discharging state data to the BMS based on the signal connection paths of the plurality of batteries and the BMS.
Specifically, after the current charge and discharge state data are obtained, the collected current charge and discharge state data are marked by using the battery numbers corresponding to the plurality of batteries, so that the marked current charge and discharge state data can be obtained, then the marked current charge and discharge state data are compressed, and the compressed marked current charge and discharge state data are uploaded to the BMS through the signal connection of the plurality of batteries and the BMS.
S13: performing a plurality of battery charging and discharging parameter adjustment treatments based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjustment parameter values of a plurality of batteries;
in a specific implementation process of the present invention, the adjusting process of the charging and discharging parameters of the plurality of batteries based on the current charging and discharging state data to obtain the charging and discharging adjusting parameter values of the plurality of batteries includes: inputting the current charging and discharging state data into a digital twin model built in the BMS battery management system to carry out twin simulation processing on each battery in the plurality of batteries so as to obtain a twin simulation result; and carrying out charging and discharging parameter adjustment processing on the plurality of batteries based on the twin simulation result to obtain charging and discharging adjustment parameter values of the plurality of batteries.
The digital twin model is a model constructed in the BMS battery management system in a digital twin network based on technical parameters of each of the number of batteries; the technical parameters comprise battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range and charging power data range.
Specifically, the digital twin model is a model constructed in a digital twin network in the BMS battery management system according to technical parameters of each of the plurality of batteries; the technical parameters comprise data such as battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range, charging power data range and the like.
Inputting current charging and discharging state data into a digital twin model built in a BMS battery management system in the BMS battery management system to carry out twin simulation processing on each battery in a plurality of batteries to obtain a twin simulation result; the simulation processing is to input the data into a digital twin model and simulate the operation of a simulation battery in a BMS battery management system, so that a twin simulation result can be obtained; and then, carrying out charging and discharging parameter adjustment processing on the plurality of batteries through twin simulation results, thereby obtaining charging and discharging adjustment parameter values of the plurality of batteries.
S14: and the BMS battery management system controls the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the plurality of batteries.
In the specific implementation process of the invention, the BMS battery management system controls the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the plurality of batteries, and the method comprises the following steps: the BMS battery management system generates a control instruction for controlling the bidirectional inverter based on the charging and discharging adjusting parameter values of the plurality of batteries; and the BMS battery management system issues the control command to the bidirectional inverter and controls the bidirectional inverter to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries based on the control command.
Further, the method further comprises: when one end of the bidirectional inverter is connected with the output load, judging whether the output load needs to supply power to the distributed bidirectional inverter power supply system; if the power supply of the distributed bidirectional inverter power supply system is not needed, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load; and if the distributed bidirectional inverter power supply system is required to supply power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and obtains current discharge state data based on the battery data acquisition sensors.
Further, the method further comprises: when one end of the bidirectional inverter is connected with the mains supply and is charged, the BMS battery management system controls the bidirectional inverter to charge the batteries arranged in a distributed mode according to preset charging power, and current charging state data are obtained based on the battery data acquisition sensors arranged on the batteries.
Specifically, the BMS battery management system generates a control instruction for controlling the bidirectional inverter according to the charge and discharge adjusting parameter values of the plurality of batteries; and then the BMS battery management system issues the control command to the bidirectional inverter, and then the bidirectional inverter is controlled by the control command to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries.
Meanwhile, when one end of the bidirectional inverter is connected with the output load, whether the output load needs to be supplied with power by the distributed bidirectional inverter power supply system is judged; when the distributed bidirectional inverter power supply system is not required to supply power, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load, and at the moment, when the output load needs to supply power, the hot standby state can be directly switched into a power supply state for the output load in time; if the bidirectional inverter power supply system needs to be distributed for supplying power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and then current discharge state data are obtained according to the battery data acquisition sensors.
When one end of the bidirectional inverter is connected with a mains supply and is charged, the BMS battery management system needs to control the bidirectional inverter to charge a plurality of distributed batteries according to preset charging power, and then current charging state data are obtained through a plurality of battery data acquisition sensors.
In the embodiment of the invention, the charging and discharging management of the plurality of batteries which are distributed by the BMS battery management system is realized, so that the plurality of batteries have higher safety during charging and discharging, and the plurality of batteries have longer service life; and meanwhile, the safety of the distributed bidirectional inverter power supply system in work is ensured.
Example two
Referring to fig. 2, fig. 2 is a schematic structural composition diagram of a charging and discharging management device based on a distributed bidirectional inverter power system according to an embodiment of the present invention.
As shown in fig. 2, a charging and discharging management device based on a distributed bidirectional inverter power system includes a plurality of batteries, a bidirectional inverter and a BMS battery management system, the batteries are distributed and arranged, the batteries are respectively connected in parallel with one end of the bidirectional inverter, the other end of the bidirectional inverter is respectively connected with a commercial power and an output load, and the BMS battery management system is respectively connected with the batteries and the bidirectional inverter through signals; the device comprises:
the data acquisition module 21: the battery data acquisition sensors are used for acquiring current charge and discharge state data based on the current charge and discharge state data;
in the specific implementation process of the invention, the current charge-discharge state data comprises current charge state data or current discharge state data; the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power and the credit discharge power of the battery; the current charging state data comprises current charging voltage, current charging current, current battery temperature, current battery capacity data, current charging power and limit charging power of the battery.
Further, the setting-based acquisition of current charge and discharge state data by the plurality of battery data acquisition sensors includes: and corresponding data acquisition sensors are respectively arranged on corresponding nodes of the plurality of batteries, and the node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired based on the set corresponding data acquisition sensors to obtain the current charging and discharging state data.
Specifically, the implementation of the charging management method in the present invention needs to be performed in a distributed bidirectional inverter power supply system, which is a hardware carrier for implementing the charging management method; the distributed bidirectional inverter power supply system comprises a plurality of batteries, a bidirectional inverter and a BMS battery management system which are arranged in a distributed manner, wherein the batteries are respectively connected with one end of the bidirectional inverter in parallel, and the other end of the bidirectional inverter is respectively used for being connected with a mains supply and an output load; the method comprises the following steps that a charging mode is entered when the other end of a bidirectional inverter is connected with commercial power, and a discharging mode is entered when the other end of the bidirectional inverter is connected with an output load; the BMS battery management system is respectively connected with a plurality of batteries and the bidirectional inverter through signals.
The method comprises the steps that corresponding data acquisition sensors are respectively arranged on corresponding nodes of a plurality of batteries, and when the distributed batteries are charged and discharged, node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired through the corresponding data acquisition sensors to obtain current charging and discharging state data; the current charging and discharging state data comprise current charging state data or current discharging state data; the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power, the credit discharge power and the like of the battery; the current charging state data includes a current charging voltage, a current charging current, a current battery temperature, current battery capacity data, current charging power, credit charging power, and the like of the battery.
The data uploading module 22: the battery management system is used for transmitting the obtained current charging and discharging state data to the BMS battery management system on the basis of signal connection;
in a specific implementation process of the present invention, the uploading the obtained current charge and discharge state data to the BMS battery management system based on a signal connection includes: after the current charging and discharging state data are obtained, marking the current charging and discharging state data by using the battery numbers corresponding to the plurality of batteries to obtain marked current charging and discharging state data; and uploading the marked current charging and discharging state data to the BMS based on the signal connection paths of the plurality of batteries and the BMS.
Specifically, after the current charge and discharge state data are obtained, the collected current charge and discharge state data are marked by using the battery numbers corresponding to the plurality of batteries, so that the marked current charge and discharge state data can be obtained, then the marked current charge and discharge state data are compressed, and the compressed marked current charge and discharge state data are uploaded to the BMS through the signal connection of the plurality of batteries and the BMS.
The data conditioning module 23: the battery management system is used for carrying out charging and discharging parameter adjustment processing on a plurality of batteries based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjustment parameter values of the plurality of batteries;
in a specific implementation process of the present invention, the adjusting process of the charging and discharging parameters of the plurality of batteries based on the current charging and discharging state data to obtain the charging and discharging adjusting parameter values of the plurality of batteries includes: inputting the current charging and discharging state data into a digital twin model built in the BMS battery management system to carry out twin simulation processing on each battery in the plurality of batteries so as to obtain a twin simulation result; and carrying out charging and discharging parameter adjustment processing on the plurality of batteries based on the twin simulation result to obtain charging and discharging adjustment parameter values of the plurality of batteries.
The digital twin model is a model constructed in the BMS battery management system in a digital twin network based on technical parameters of each of the several batteries; the technical parameters comprise battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range and charging power data range.
Specifically, the digital twin model is a model constructed in a digital twin network in the BMS battery management system according to technical parameters of each of the plurality of batteries; the technical parameters comprise data such as battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range, charging power data range and the like.
Inputting current charging and discharging state data into a digital twin model built in a BMS battery management system in the BMS battery management system to carry out twin simulation processing on each battery in a plurality of batteries to obtain a twin simulation result; the simulation processing is to input the data into a digital twin model and simulate the operation of a simulation battery in a BMS battery management system, so that a twin simulation result can be obtained; and then, carrying out charging and discharging parameter adjustment processing on the plurality of batteries through twin simulation results, thereby obtaining charging and discharging adjustment parameter values of the plurality of batteries.
The control module 24: and the BMS battery management system is used for controlling the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the batteries.
In the specific implementation process of the present invention, the BMS battery management system controlling the bidirectional inverter to perform charging and discharging processing according to the charging and discharging adjustment parameter values of the plurality of batteries includes: the BMS battery management system generates a control instruction for controlling the bidirectional inverter based on the charging and discharging adjusting parameter values of the plurality of batteries; and the BMS battery management system issues the control command to the bidirectional inverter and controls the bidirectional inverter to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries based on the control command.
Further, the apparatus further comprises: when one end of the bidirectional inverter is connected with the output load, judging whether the output load needs to supply power to the distributed bidirectional inverter power supply system; if the power supply of the distributed bidirectional inverter power supply system is not needed, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load; and if the distributed bidirectional inverter power supply system is required to supply power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and obtains current discharge state data based on the battery data acquisition sensors.
Further, the apparatus further comprises: when one end of the bidirectional inverter is connected with the commercial power and is charged, the BMS battery management system controls the bidirectional inverter to charge the plurality of batteries which are distributed according to preset charging power, and obtains current charging state data based on the plurality of battery data acquisition sensors.
Specifically, the BMS battery management system generates a control instruction for controlling the bidirectional inverter according to the charge and discharge adjusting parameter values of the plurality of batteries; and then the BMS battery management system issues the control command to the bidirectional inverter, and then the bidirectional inverter is controlled by the control command to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries.
Meanwhile, when one end of the bidirectional inverter is connected with the output load, whether the output load needs the distributed bidirectional inverter power supply system for supplying power or not needs to be judged; when the distributed bidirectional inverter power supply system is not required to supply power, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load, and at the moment, when the output load needs to supply power, the hot standby state can be directly switched to a power supply state from the hot standby state; if the bidirectional inverter power supply system needs to be distributed for supplying power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and then current discharge state data are obtained according to the battery data acquisition sensors.
When one end of the bidirectional inverter is connected with a mains supply and is charged, the BMS battery management system needs to control the bidirectional inverter to charge a plurality of distributed batteries according to preset charging power, and then current charging state data are obtained through a plurality of battery data acquisition sensors.
In the embodiment of the invention, the charging and discharging management of the plurality of batteries which are distributed by the BMS battery management system is realized, so that the plurality of batteries have higher safety during charging and discharging, and the plurality of batteries have longer service life; meanwhile, the safety of the distributed bidirectional inverter power supply system during working is ensured.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: read Only Memory (ROM), random Access Memory (RAM), magnetic or optical disks, and the like.
In addition, the charging and discharging management method and device based on the distributed bidirectional inverter power supply system according to the embodiments of the present invention are described in detail, and a specific example is used herein to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A charge and discharge management method based on a distributed bidirectional inverter power supply system is characterized in that the distributed bidirectional inverter power supply system comprises a plurality of batteries, a bidirectional inverter and a BMS battery management system which are arranged in a distributed mode, the batteries are respectively connected with one end of the bidirectional inverter in parallel, the other end of the bidirectional inverter is respectively used for being connected with a mains supply and an output load, and the BMS battery management system is respectively connected with the batteries and the bidirectional inverter through signals; the method comprises the following steps:
acquiring current charge and discharge state data based on the plurality of battery data acquisition sensors;
the obtained current charging and discharging state data are transmitted to the BMS battery management system on the basis of signal connection;
performing a plurality of battery charging and discharging parameter adjustment treatments based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjustment parameter values of a plurality of batteries;
and the BMS battery management system controls the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the plurality of batteries.
2. The charge and discharge management method according to claim 1, wherein the current charge and discharge state data includes current charge state data or current discharge state data;
the current discharge state data comprises the current discharge voltage, the current discharge current, the current battery temperature, the current battery capacity data, the current discharge power and the credit discharge power of the battery;
the current charging state data comprises current charging voltage, current charging current, current battery temperature, current battery capacity data, current charging power and limit charging power of the battery.
3. The charge and discharge management method according to claim 1, wherein the obtaining current charge and discharge state data based on the setting of the plurality of battery data collecting sensors includes:
and corresponding data acquisition sensors are respectively arranged on corresponding nodes of the plurality of batteries, and the node data on the corresponding nodes of the plurality of batteries during charging and discharging are acquired based on the set corresponding data acquisition sensors to obtain the current charging and discharging state data.
4. The charge and discharge management method according to claim 1, wherein the uploading the obtained current charge and discharge state data to the BMS battery management system based on a signal connection comprises:
after the current charging and discharging state data are obtained, marking the current charging and discharging state data by using the battery numbers corresponding to the plurality of batteries to obtain marked current charging and discharging state data;
and uploading the marked current charging and discharging state data to the BMS based on the signal connection paths of the plurality of batteries and the BMS.
5. The charging and discharging management method according to claim 1, wherein the performing a plurality of battery charging and discharging parameter adjustment processes based on the current charging and discharging state data to obtain charging and discharging adjustment parameter values of a plurality of batteries comprises:
inputting the current charging and discharging state data into a digital twin model built in the BMS battery management system to carry out twin simulation processing on each battery in the plurality of batteries so as to obtain a twin simulation result;
and carrying out charging and discharging parameter adjustment processing on the plurality of batteries based on the twin simulation result to obtain charging and discharging adjustment parameter values of the plurality of batteries.
6. The charge and discharge management method according to claim 5, wherein the digital twin model is a model constructed in the BMS battery management system as a digital twin network based on technical parameters of each of the number of batteries; the technical parameters comprise battery model data, limit output voltage data, limit charging voltage data, limit output current data, limit charging current data, limit station temperature data, output power data range and charging power data range.
7. The charging and discharging management method according to claim 1, wherein the BMS battery management system controls the bidirectional inverter to perform the charging and discharging process according to the charging and discharging adjustment parameter values of the plurality of batteries, and comprises:
the BMS battery management system generates a control instruction for controlling the bidirectional inverter based on the charging and discharging adjustment parameter values of the batteries;
and the BMS battery management system issues the control command to the bidirectional inverter and controls the bidirectional inverter to carry out charging and discharging processing according to the charging and discharging adjusting parameter values of the plurality of batteries based on the control command.
8. The charge and discharge management method according to claim 1, wherein the method further comprises:
when one end of the bidirectional inverter is connected with the output load, judging whether the output load needs to supply power to the distributed bidirectional inverter power supply system;
if the power supply of the distributed bidirectional inverter power supply system is not needed, the BMS battery management system controls the bidirectional inverter to enter a hot standby state for supplying power to the output load according to the load power in the output load;
and if the distributed bidirectional inverter power supply system is required to supply power, the BMS battery management system controls the bidirectional inverter to discharge to the output load according to the load power in the output load, and current discharge state data are obtained based on the battery data acquisition sensors.
9. The charge and discharge management method according to claim 1, further comprising:
when one end of the bidirectional inverter is connected with the commercial power and is charged, the BMS battery management system controls the bidirectional inverter to charge the plurality of batteries which are distributed according to preset charging power, and obtains current charging state data based on the plurality of battery data acquisition sensors.
10. A charging and discharging management device based on a distributed bidirectional inverter power supply system is characterized in that the distributed bidirectional inverter power supply system comprises a plurality of batteries, a bidirectional inverter and a BMS battery management system which are arranged in a distributed mode, the batteries are respectively connected with one end of the bidirectional inverter in parallel, the other end of the bidirectional inverter is respectively used for being connected with a mains supply and an output load, and the BMS battery management system is respectively connected with the batteries and the bidirectional inverter through signals; the device comprises:
a data acquisition module: the battery data acquisition sensors are used for acquiring current charge and discharge state data based on the current charge and discharge state data;
the data uploading module: the battery management system is used for transmitting the obtained current charging and discharging state data to the BMS battery management system on the basis of signal connection;
a data adjusting module: the battery management system is used for adjusting a plurality of battery charging and discharging parameters based on the current charging and discharging state data in the BMS battery management system to obtain charging and discharging adjusting parameter values of a plurality of batteries;
a control module: and the BMS battery management system is used for controlling the bidirectional inverter to carry out charging and discharging treatment according to the charging and discharging adjusting parameter values of the batteries.
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