CN117375190B - Parallel operation method and system of two-cluster battery system - Google Patents

Parallel operation method and system of two-cluster battery system Download PDF

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Publication number
CN117375190B
CN117375190B CN202311663028.9A CN202311663028A CN117375190B CN 117375190 B CN117375190 B CN 117375190B CN 202311663028 A CN202311663028 A CN 202311663028A CN 117375190 B CN117375190 B CN 117375190B
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cluster
battery systems
parallel operation
operation request
frequency
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CN117375190A (en
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张平
刘峰
陈绍源
温柱生
曾荣
罗萍
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Shenzhen Li Hi Tech Co ltd
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Shenzhen Li Hi Tech Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application relates to a parallel operation method and a parallel operation system of two clusters of battery systems, wherein the parallel operation method and the parallel operation system comprise the following steps: writing a unique SN code to each cluster of battery systems; according to the corresponding relation between the SN codes and the frequency of the parallel operation request data, the frequency of sending the parallel operation request data outwards from each cluster of battery systems is analyzed and determined, and the parallel operation request data is sent outwards according to the analyzed and determined frequency; after one cluster of battery systems receives the parallel operation request data of the other party, suspending sending the parallel operation request outwards and responding to the parallel operation request of the other party, marking the cluster of batteries which firstly receives the parallel operation request as a slave and marking the cluster of batteries which receives the parallel operation request response as a host; the method comprises the steps that a host requests to acquire all information of a slave, and acquires all information of the slave; and outputting all information of the two clusters of battery systems through a communication interface by using all information of the host and all acquired data of the slave. The application has the effect of effectively improving the accuracy and the effectiveness of the information transmission of the battery clusters.

Description

Parallel operation method and system of two-cluster battery system
Technical Field
The invention relates to the technical field of battery management, in particular to a parallel operation method and system of a two-cluster battery system.
Background
The battery cluster is a battery assembly which is formed by connecting battery monomers in series, parallel or serial-parallel connection mode and realizes independent operation after being connected with an energy storage converter and auxiliary facilities, and the battery cluster also preferably comprises components such as a battery management system, a monitoring and protecting circuit, an electric and communication interface and the like.
When two battery clusters work, the mode of acquiring the two battery cluster associated information for analysis is to acquire the two battery cluster associated information one by one and to collect and analyze all the information.
With respect to the related art in the above, the inventors found that there are the following drawbacks: when the related information of two battery clusters needs to be manually summarized and analyzed, the method is troublesome, and occupies more communication interface resources, and the data on the bus can be disordered when the host is used as the host to request the data of the other side, so that communication errors are caused.
Disclosure of Invention
In order to effectively improve the accuracy and effectiveness of battery cluster information transmission, the application provides a parallel operation method and system of a two-cluster battery system.
In a first aspect, the present application provides a method for combining two battery systems, which adopts the following technical scheme:
the parallel operation method of the two-cluster battery system comprises the following steps:
writing a unique SN code into each cluster of battery systems, and defining that each cluster of battery systems has one path of external communication interface;
According to the corresponding relation between the SN codes and the frequency of the parallel operation request data, the frequency of sending the parallel operation request data outwards from each cluster of battery systems is analyzed and determined, and the parallel operation request data is sent outwards according to the analyzed and determined frequency;
After one cluster of battery systems receives the parallel operation request data of the other party, suspending sending the parallel operation request outwards and responding to the parallel operation request of the other party, marking the cluster of batteries which firstly receives the parallel operation request as a slave and marking the cluster of batteries which receives the parallel operation request response as a host;
The method comprises the steps that a host requests to acquire all information of a slave, and acquires all information of the slave;
And outputting all information of the two clusters of battery systems through a communication interface by using all information of the host and all acquired data of the slave.
By adopting the technical scheme, the information can be summarized effectively by arranging the two battery clusters as the main slave, and the transmission of all information can be realized through one communication interface, so that the accuracy and the effectiveness of the information transmission are ensured.
Optionally, the analyzing and determining the frequency of sending parallel operation request data to the outside of each cluster of battery systems includes:
Whether the analysis system is provided with frequency of sending parallel operation request data outwards for each cluster of battery systems or not is judged;
If so, using the set frequency of sending parallel operation request data outwards for each cluster of battery systems as the analyzed and determined frequency of sending parallel operation request data outwards for each cluster of battery systems;
if not, analyzing and determining the frequency of sending the parallel operation request data to the outside of each cluster of battery systems according to the corresponding relation between the SN codes and the frequency of the parallel operation request data.
By adopting the above technical solution, it is considered that the frequency set by the internal system may be adopted if the internal system has the frequency of setting the request data, and if not, it may be executed according to the SN code.
Optionally, the analyzing whether the system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems includes:
acquiring associated parameter data contained in the environmental information of each cluster of battery systems and associated parameter data of the information of each cluster of battery systems;
Analyzing whether the associated parameter data contained in the environmental information of each cluster of battery systems fall into a preset first associated parameter data range or not, and simultaneously analyzing whether the associated parameter data of the information of each cluster of battery systems fall into a second associated parameter data range or not;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
If not, analyzing whether only the associated parameter data contained in the environmental information of each cluster of battery systems does not fall into a preset first associated parameter data range or whether the associated parameter data of the information of each cluster of battery systems does not fall into a second associated parameter data range;
if yes, determining that the system is provided with frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is half of the frequency determined according to SN codes;
if not, determining that the system is provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is 1/4 of the frequency determined according to the SN codes.
By adopting the technical scheme, the situation that the environment information of each battery system and the associated parameter data of the information of each battery system are related to the information conveying frequency is fully considered, and once the problems are more, the conveying frequency is increased, so that the problem that two battery clusters are acquired in time outside is guaranteed, and the problem is solved in time.
Optionally, the analyzing whether the system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems includes:
acquiring and outputting all the time periods of the information of the two clusters of battery systems;
analyzing and outputting whether the time period of all the information of the two clusters of battery systems falls within a preset time period range;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
If not, the system is determined to be provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, and the set frequency is twice the frequency determined according to the SN codes.
By adopting the technical scheme, the analysis of the two battery clusters is not always performed, and once the battery clusters are not in operation, the frequency of information transmission can be reduced.
Optionally, the analyzing whether the system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems includes:
acquiring associated parameter data contained in the environmental information of each cluster of battery systems;
analyzing whether the associated parameter data contained in the environment information of each cluster of battery system falls into a preset associated parameter data range or not;
If not, determining that the system is provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is half of the frequency determined according to the SN codes;
if yes, acquiring a time period in which all the information of the two clusters of battery systems is output, and analyzing whether the time period in which all the information of the two clusters of battery systems is output falls within a preset time period range;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
If not, the system is determined to be provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, and the set frequency is twice the frequency determined according to the SN codes.
By adopting the technical scheme, the environment condition and the specific time period are comprehensively considered, and the frequency of the request data can be further analyzed, so that the rationality of information receiving is ensured.
Optionally, the method further comprises the steps of after sending the parallel operation request data outwards according to the analyzed and determined frequency, and after one cluster of battery systems receives the parallel operation request data of the other party, suspending sending the parallel operation request outwards and responding to the parallel operation request of the other party, wherein the method specifically comprises the following steps of:
analyzing whether the communication interface of one cluster of battery systems is in fault or not;
if yes, taking one cluster of battery systems at the fault communication interface as a slave and the other cluster of battery systems as a host;
if not, continuing the subsequent steps.
By adopting the technical scheme, the analysis of whether the communication interface is in fault or not before the master-slave relation is determined can indirectly ensure that information can be transmitted after the master-slave relation is determined.
Optionally, the method further comprises the steps of after sending the parallel operation request data outwards according to the analyzed and determined frequency, and after one cluster of battery systems receives the parallel operation request data of the other party, suspending sending the parallel operation request outwards and responding to the parallel operation request of the other party, wherein the method specifically comprises the following steps of:
Analyzing whether the electric quantity of one cluster of battery systems is lower than a preset electric quantity value;
If yes, taking one cluster of battery systems with the power value lower than the preset power value as a slave machine and the other cluster of battery systems as a master machine;
if not, continuing the subsequent steps.
By adopting the technical scheme, the battery cluster serving as the host can be ensured not to work continuously due to insufficient electric quantity in the subsequent information transmission process by analyzing the residual electric quantity.
Optionally, the preset power value is as follows:
Acquiring the frequency of sending parallel operation request data to the outside of each cluster of battery systems which are determined by analysis;
And analyzing and determining a preset electric quantity value according to the corresponding relation between the frequency of sending parallel operation request data to the outside of each battery system and the electric quantity consumed by the communication interface for outputting all information of the two battery systems.
By adopting the technical scheme, the frequency of sending parallel operation request data to the outside of each cluster of battery systems is correlated with the electric quantity, and the determined electric quantity value is reasonable.
Optionally, the method further comprises the step of outputting all information of the two clusters of battery systems through the communication interface after outputting all information of the host and all acquired data of the slave, wherein the steps are specifically as follows:
Outputting information contained in the battery system actually serving as a host through a communication interface, and then outputting information contained in another battery system;
firstly analyzing whether a host has a fault or not according to the received information;
If not, powering up the cluster of battery systems serving as the host, and then powering up the cluster of battery systems serving as the slaves;
if yes, the cluster battery system serving as the slave is powered on, and then the cluster battery system serving as the host is powered on.
By adopting the technical scheme, maintenance personnel or clients can be well corresponding to the EMS platform or the upper computer on one hand; and the problems can be well eliminated in the process of production test.
In a second aspect, the present application provides a parallel operation system of two clusters of battery systems, which adopts the following technical scheme:
a parallel operation system of two-cluster battery systems, comprising a memory, a processor and a program stored in the memory and executable on the processor, wherein the program can be loaded and executed by the processor to realize the parallel operation method of two-cluster battery systems according to the first aspect.
Through adopting above-mentioned technical scheme, through the accent of procedure, through setting up two battery clusters as a master, can effectively realize the information and summarize to through a communication interface, can realize the transmission of all information, ensured the accuracy validity of information transmission.
Drawings
Fig. 1 is a flow chart of a parallel operation method of a two-cluster battery system according to an embodiment of the application.
Fig. 2 is a flow chart for analyzing and determining the frequency of sending parallel machine request data to the outside of each cluster of battery systems according to another embodiment of the application.
Fig. 3 is a flowchart illustrating a system for analyzing whether a system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems according to another embodiment of the present application.
Fig. 4 is a flowchart illustrating a system for analyzing whether a system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems according to another embodiment of the present application.
Fig. 5 is a flowchart illustrating a system for analyzing whether a system is provided with a frequency of sending parallel operation request data to the outside of each cluster of battery systems according to another embodiment of the present application.
Fig. 6 is a flowchart illustrating steps before suspending sending out a parallel operation request and responding to a parallel operation request of a partner after receiving parallel operation request data of the partner by one of the battery systems according to another embodiment of the present application after sending out parallel operation request data according to the analyzed and determined frequency.
Fig. 7 is a flowchart illustrating steps before suspending sending out a parallel operation request and responding to a parallel operation request of a partner after receiving parallel operation request data of the partner by one of the battery systems according to another embodiment of the present application after sending out parallel operation request data according to the analyzed and determined frequency.
FIG. 8 is a schematic diagram of an analysis and acquisition process of a preset electric quantity value according to another embodiment of the present application.
Fig. 9 is a flowchart of the steps after all information of the master itself and all data of the acquired slaves are output through the communication interface according to another embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a parallel operation method of a two-cluster battery system disclosed in the application includes:
step S100, writing a unique SN code into each cluster of battery systems, and defining that each cluster of battery systems has one path of external communication interface.
The SN code is the serial number of the product, and is the ID card number of the product, which is also called machine code, authentication code and registration application code.
Step S200, according to the corresponding relation between the SN codes and the frequency of the parallel operation request data, the frequency of sending the parallel operation request data outwards from each cluster of battery systems is analyzed and determined, and the parallel operation request data is sent outwards according to the analyzed and determined frequency.
The analysis of the frequency of sending parallel operation request data to the outside of each cluster of battery systems is as follows: and inquiring and acquiring the frequency of sending the parallel operation request data to the outside of each cluster of battery systems from a preset database storing the corresponding relation between the SN codes and the frequency of the parallel operation request data by taking the SN codes as an inquiry object. For the supplement, the last ASCL codes of the two system SN codes cannot be the same and only support 0-9
For example, the correspondence between SN codes and the frequency of parallel operation request data may be as follows: the SN code is 0 and the delay is 150ms; if the time delay is 1, the time delay is 300ms; if the value is 2, the delay is 450ms, so that the recursion is performed.
Step S300, after one cluster of battery systems receives the parallel operation request data of the other party, the parallel operation request is stopped from being sent outwards and responded, the cluster of batteries which receive the parallel operation request first are marked as slaves, and the cluster of batteries which receive the parallel operation request response are marked as hosts.
Step S400, the master requests to obtain all information of the slave, and obtains all information of the slave.
All the information mentioned in step S400 includes, but is not limited to, the following: the battery pack comprises a battery cell, a battery pack, a battery cell voltage, a battery cell telecommunication temperature, a battery pack state, an SOC, an SOH, a cycle number, a total charge-discharge capacity and a maximum allowable charge-discharge current.
And S500, outputting all information of the host and all data of the obtained slaves through a communication interface.
The output object of the communication interface mentioned in step S500 is an EMS end, and the EMS stores all battery data, so that on one hand, the problem is conveniently checked when the problem occurs; on the other hand, the service condition of each battery cell can be monitored in real time.
In step S200 of fig. 1, further, it is considered that the request frequency is not necessarily fixed, and specific analysis should be performed according to the situation of each battery system, specifically described with reference to the embodiment shown in fig. 2.
Referring to fig. 2, the analysis to determine the frequency of sending parallel operation request data out of each cluster of battery systems includes:
In step S210, the analysis system determines whether or not the frequency of sending parallel operation request data to the outside of each cluster of battery systems is set. If yes, go to step S220; if not, step S230 is performed.
Step S220, the set frequency of sending parallel operation request data outwards for each cluster of battery systems is used as the analyzed and determined frequency of sending parallel operation request data outwards for each cluster of battery systems.
The set frequency of sending parallel operation request data to the outside of each cluster of battery systems can be determined by the system according to a certain rule or mode.
Step S230, according to the corresponding relation between the SN codes and the frequency of the parallel operation request data, the frequency of sending the parallel operation request data to the outside of each cluster of battery systems is analyzed and determined.
In step S210 of fig. 2, further consideration is given to a rule or pattern that specifically determines the frequency of outgoing parallel machine request data, which is described in detail herein with reference to the embodiment shown in fig. 3.
Referring to fig. 3, the frequency of analyzing whether the system is provided with data of parallel machine request sent out per cluster of battery systems includes:
Step S211, acquiring associated parameter data included in the environmental information of each battery system and associated parameter data of the information of each battery system.
Wherein, the related parameters included in the environmental information include, but are not limited to, environmental temperature and humidity; the associated parameters of the information provided by each cluster of battery systems include, but are not limited to, battery pack status, and remaining power.
In step S212, it is analyzed whether the associated parameter data included in the environmental information of each battery system falls within a preset first associated parameter data range, and at the same time, it is analyzed whether the associated parameter data of the information of each battery system falls within a second associated parameter data range. If yes, go to step S213; if not, step S214 is performed.
The preset first association parameter data range and the second association parameter data range can be set according to requirements.
In step S213, it is determined that the system is not provided with a frequency at which each cluster of battery systems transmits parallel operation request data to the outside.
In step S214, it is analyzed whether only the associated parameter data included in the environmental information of each battery system does not fall into the preset first associated parameter data range, or the associated parameter data of the information of each battery system does not fall into the second associated parameter data range. If yes, go to step S215; if not, step S216 is performed.
In step S215, the determination system sets a frequency at which each cluster of battery systems transmits parallel operation request data to the outside, and the set frequency is half of the frequency determined according to the SN code.
In step S216, the determination system sets a frequency at which each cluster of battery systems transmits parallel operation request data to the outside, and the set frequency is 1/4 of the frequency determined according to the SN code.
In step S210 of fig. 2, further consideration is given to a rule or pattern that specifically determines the frequency of outgoing parallel machine request data, which is described in detail herein with reference to the embodiment shown in fig. 4.
Referring to fig. 4, the frequency of analyzing whether the system is provided with data of parallel machine request sent out per cluster of battery systems includes:
Step S21a, a period in which all information of the two-cluster battery system is output is acquired.
The time period in which all information of the two clusters of battery systems is output can be acquired through system inquiry.
Step S21b, analyzing whether the period of time in which all the information of the two-cluster battery system is output falls within the preset period of time. If yes, go to step S21c; if not, step S21d is performed.
The preset time period can be 8 a.m. to 5 a.m. in the afternoon, namely daytime working time.
In step S21c, the frequency of sending parallel operation request data to the outside of each cluster of battery systems is determined that the system is not set.
In step S21d, the determination system sets a frequency at which each cluster of battery systems transmits parallel operation request data to the outside, and the set frequency is twice the frequency determined according to the SN code.
In step S210 of fig. 2, further consideration is given to a rule or pattern that specifically determines the frequency of outgoing parallel machine request data, which is described in detail herein with reference to the embodiment shown in fig. 5.
Referring to fig. 5, the frequency of analyzing whether the system is provided with data of parallel machine request sent out per cluster of battery systems includes:
step S21A, obtaining associated parameter data contained in the environment information of each cluster of battery systems.
Step S21B, whether the associated parameter data contained in the environment information of each cluster of battery systems falls into a preset associated parameter data range is analyzed. If not, executing step S21C; if yes, step S21D is performed.
In step S21C, the determination system sets a frequency at which each cluster of battery systems transmits parallel operation request data to the outside, and the set frequency is half of the frequency determined according to the SN code.
Step S21D, the time period in which all the information of the two clusters of battery systems is output is acquired, and whether the time period in which all the information of the two clusters of battery systems is output falls within a preset time period range is analyzed. If yes, go to step S21E; if not, step S21F is performed.
In step S21E, the frequency at which the parallel operation request data is sent to the outside per cluster of battery systems is determined not to be set by the system.
In step S21F, the determination system sets a frequency at which each cluster of battery systems transmits parallel operation request data to the outside, and the set frequency is twice the frequency determined according to the SN code.
Between step S200 and step S300 in fig. 1, the situation of the communication interface needs to be considered when analyzing and determining the master-slave, which is specifically described in detail by the embodiment shown in fig. 6.
Referring to fig. 6, a parallel operation method of two clusters of battery systems further includes the steps of after sending parallel operation request data outwards according to the analyzed and determined frequency, and after one cluster of battery systems receives parallel operation request data of the other party, suspending sending parallel operation request outwards and responding to the parallel operation request of the other party, specifically including the following steps:
Step SA00, analyzing whether the communication interface of one cluster of battery systems is in fault. If yes, go to step SB00; if not, step SC00 is executed.
The analysis that the communication interface of one cluster of battery systems is in fault is as follows: whether the communication interface is in fault can be indirectly judged through information output and receiving, and whether the communication interface is in fault can be analyzed through detecting and analyzing the communication condition of the communication interface by the associated fault detection device.
Step SB00, taking one cluster of battery systems at the fault communication interface as a slave and the other cluster of battery systems as a master.
Step SC00, continuing the subsequent steps.
Between step S200 and step S300 in fig. 1, the situation of the communication interface needs to be considered when analyzing and determining the master-slave, which is specifically described in detail by the embodiment shown in fig. 7.
Referring to fig. 7, a method for combining two clusters of battery systems further includes the steps of after sending the combining request data outwards according to the analyzed and determined frequency, and after one cluster of battery systems receives the combining request data of the other party, suspending sending the combining request outwards and responding to the combining request of the other party, specifically including the following steps:
step Sa00, analyzing whether the electric quantity of one cluster of battery systems is lower than a preset electric quantity value. If yes, executing a step Sb00; if not, step Sc00 is executed.
The preset electrical value may be 20% or specifically set as desired.
In step Sb00, one cluster of battery systems with a power lower than a preset power value is used as a slave, and the other cluster of battery systems is used as a master.
Step Sc00, continuing the subsequent steps.
In step Sa00 of fig. 7, a specific analysis of the preset electric power value is required, which is specifically described in detail through the embodiment shown in fig. 8.
Referring to fig. 8, analysis of the preset electric quantity value is obtained as follows:
Step Sa10, the frequency of sending parallel operation request data to the outside of each cluster of battery systems determined by analysis is acquired.
Step Sa20, according to the corresponding relation between the frequency of the parallel operation request data sent by each cluster of battery systems and the electric quantity consumed by the communication interface to output all the information of the two clusters of battery systems, analyzing and determining a preset electric quantity value.
The analysis of the power consumed by the communication interface to output all the information of the two clusters of battery systems is as follows:
and taking the frequency of the parallel operation request data sent outwards by each cluster of battery systems as an inquiry object, and inquiring and acquiring a preset electric quantity value from a preset database storing the electric quantity consumed by the frequency of the parallel operation request data sent outwards by each cluster of battery systems and all information output by the communication interface of the two clusters of battery systems.
After step S500 of fig. 1, it should be analyzed whether there is a failure in one of the battery systems during the communication, and the specific analysis will be described in detail with reference to the embodiment shown in fig. 9.
Referring to fig. 9, a method for merging two clusters of battery systems further includes a step of outputting all information of the two clusters of battery systems through a communication interface after outputting all information of the master and all acquired data of the slave, specifically as follows:
In step S600, the information contained in the battery system actually serving as the host is output through the communication interface first, and then the information contained in the other battery system is output.
Step S700, first analyzes whether the host has a fault according to the received information. If not, step S800 is executed, and if yes, step S900 is executed.
Among them, the failure of the host includes, but is not limited to, the following: the battery cell is over-voltage and under-voltage, the cell is over-temperature and under-temperature, the contactor is stuck, and the insulation detection fault is detected.
Step S800, the cluster of battery systems serving as the master is powered on first, and then the cluster of battery systems serving as the slaves is powered on.
In step S900, the cluster of battery systems serving as the slaves is powered on, and then the cluster of battery systems serving as the masters is powered on.
Based on the same inventive concept, an embodiment of the present invention provides a parallel operation system of a two-cluster battery system, which includes a memory and a processor, where the memory stores a program capable of running on the processor to implement any one of the methods shown in fig. 1 to 9.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (6)

1. A method for merging two clusters of battery systems, comprising:
writing a unique SN code into each cluster of battery systems, and defining that each cluster of battery systems has one path of external communication interface;
According to the corresponding relation between the SN codes and the frequency of the parallel operation request data, the frequency of sending the parallel operation request data outwards from each cluster of battery systems is analyzed and determined, and the parallel operation request data is sent outwards according to the analyzed and determined frequency;
after one cluster of battery systems receives the parallel operation request data of the other party, suspending sending the parallel operation request outwards and responding to the parallel operation request of the other party, calibrating the cluster of battery systems which firstly receives the parallel operation request as slaves and calibrating the cluster of battery systems which receives the parallel operation request response as hosts;
The method comprises the steps that a host requests to acquire all information of a slave, and acquires all information of the slave;
Outputting all information of the two clusters of battery systems through a communication interface by using all information of the host and all information of the acquired slave;
analyzing and determining the frequency of sending parallel operation request data outwards by each cluster of battery systems comprises the following steps:
Whether the analysis system is provided with frequency of sending parallel operation request data outwards for each cluster of battery systems or not is judged;
If so, using the set frequency of sending parallel operation request data outwards for each cluster of battery systems as the analyzed and determined frequency of sending parallel operation request data outwards for each cluster of battery systems;
if not, analyzing and determining the frequency of sending the parallel operation request data to the outside of each cluster of battery systems according to the corresponding relation between the SN codes and the frequency of the parallel operation request data;
the frequency for analyzing whether the system is provided with the data of the parallel operation request sent out by each cluster of battery systems comprises the following steps:
acquiring associated parameter data contained in the environmental information of each cluster of battery systems and associated parameter data of the information of each cluster of battery systems;
Analyzing whether the associated parameter data contained in the environmental information of each cluster of battery systems fall into a preset first associated parameter data range or not, and simultaneously analyzing whether the associated parameter data of the information of each cluster of battery systems fall into a second associated parameter data range or not;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
If not, analyzing whether only the associated parameter data contained in the environmental information of each cluster of battery systems does not fall into a preset first associated parameter data range or whether the associated parameter data of the information of each cluster of battery systems does not fall into a second associated parameter data range;
if yes, determining that the system is provided with frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is half of the frequency determined according to SN codes;
If not, determining that the system is provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is 1/4 of the frequency determined according to the SN codes;
or the frequency of analyzing whether the system is provided with the data of the parallel operation request sent out by each cluster of battery systems comprises the following steps:
acquiring and outputting all the time periods of the information of the two clusters of battery systems;
analyzing and outputting whether the time period of all the information of the two clusters of battery systems falls within a preset time period range;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
if not, determining that the system is provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is twice the frequency determined according to the SN codes;
or the frequency of analyzing whether the system is provided with the data of the parallel operation request sent out by each cluster of battery systems comprises the following steps:
acquiring associated parameter data contained in the environmental information of each cluster of battery systems;
analyzing whether the associated parameter data contained in the environment information of each cluster of battery system falls into a preset associated parameter data range or not;
If not, determining that the system is provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, wherein the set frequency is half of the frequency determined according to the SN codes;
if yes, acquiring a time period in which all the information of the two clusters of battery systems is output, and analyzing whether the time period in which all the information of the two clusters of battery systems is output falls within a preset time period range;
If yes, determining that the system is not provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems;
If not, the system is determined to be provided with the frequency of sending parallel operation request data to the outside of each cluster of battery systems, and the set frequency is twice the frequency determined according to the SN codes.
2. The method of claim 1, further comprising the step of suspending the sending of the parallel operation request to the outside and responding to the parallel operation request of the other party after one of the battery systems receives the parallel operation request data of the other party after sending the parallel operation request data to the outside according to the analyzed and determined frequency, wherein the method comprises the steps of:
analyzing whether the communication interface of one cluster of battery systems is in fault or not;
if yes, taking one cluster of battery systems at the fault communication interface as a slave and the other cluster of battery systems as a host;
if not, continuing the subsequent steps.
3. The method of claim 1, further comprising the step of suspending the sending of the parallel operation request to the outside and responding to the parallel operation request of the other party after one of the battery systems receives the parallel operation request data of the other party after sending the parallel operation request data to the outside according to the analyzed and determined frequency, wherein the method comprises the steps of:
Analyzing whether the electric quantity of one cluster of battery systems is lower than a preset electric quantity value;
If yes, taking one cluster of battery systems with the power value lower than the preset power value as a slave machine and the other cluster of battery systems as a master machine;
if not, continuing the subsequent steps.
4. A method of merging two clusters of battery systems according to claim 3, wherein the preset power values are as follows:
Acquiring the frequency of sending parallel operation request data to the outside of each cluster of battery systems which are determined by analysis;
And analyzing and determining a preset electric quantity value according to the corresponding relation between the frequency of sending parallel operation request data to the outside of each battery system and the electric quantity consumed by the communication interface for outputting all information of the two battery systems.
5. The method for merging two battery systems according to claim 1, further comprising the step of outputting all information of the two battery systems through the communication interface after outputting all information of the master itself and all information of the slave acquired, specifically comprising the steps of:
Outputting information contained in the battery system actually serving as a host through a communication interface, and then outputting information contained in another battery system;
firstly analyzing whether a host has a fault or not according to the received information;
If not, powering up the cluster of battery systems serving as the host, and then powering up the cluster of battery systems serving as the slaves;
if yes, the cluster battery system serving as the slave is powered on, and then the cluster battery system serving as the host is powered on.
6. A parallel operation system of two-cluster battery system, comprising a memory, a processor and a program stored in the memory and executable on the processor, wherein the program can be loaded and executed by the processor to implement a parallel operation method of two-cluster battery system according to any one of claims 1 to 5.
CN202311663028.9A 2023-12-06 2023-12-06 Parallel operation method and system of two-cluster battery system Active CN117375190B (en)

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