CN111564857B - Parallel battery pack control system, method and device - Google Patents
Parallel battery pack control system, method and device Download PDFInfo
- Publication number
- CN111564857B CN111564857B CN201910115179.8A CN201910115179A CN111564857B CN 111564857 B CN111564857 B CN 111564857B CN 201910115179 A CN201910115179 A CN 201910115179A CN 111564857 B CN111564857 B CN 111564857B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- parallel
- identification code
- slave
- host
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A method of controlling a parallel battery pack, comprising the steps of: when the parallel battery pack is started, acquiring identification code information of a battery pack and a time interval for transmitting an identification code instruction; controlling the battery pack to send the identification code instruction to other battery packs according to the time interval; and determining one battery pack as a pre-host machine and the other battery packs as pre-slave machines according to the identification code information of each battery pack. The invention also provides a parallel battery pack control system and a device. The parallel battery pack control system, the parallel battery pack control method and the parallel battery pack control device can avoid the parallel operation failure caused by human hardware misoperation, reduce the parallel operation error rate and save the production and maintenance cost.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a parallel battery pack control system, a parallel battery pack control method and a parallel battery pack control device.
Background
With the popularization of intelligence and informatization, the electricity demand of users is rapidly increased, and the application of the household energy storage system is unprecedented. And in the electricity consumption valley time, the battery pack in the household energy storage system can be charged so as to balance the electricity consumption load at the standby electricity peak time and save household electricity consumption expenditure. In addition, the battery pack of the household energy storage system is also used as an emergency power supply after being charged when the power is off. In order to cope with the increase of the power and the endurance time of the energy storage battery by users, if a single battery pack scheme is still adopted, the energy density and the battery capacity of the battery cells of the battery pack are increased, so that the volume and the weight of the battery pack are increased, and the research, the manufacture, the transportation and the installation costs of the battery pack are increased. And by adopting the battery pack parallel scheme, only one set of low-capacity scheme is required to be designed from the research and development perspective, so that the research and development and safety certification cost of a developer is reduced. The key of the parallel connection of the battery packs is that the state information of each secondary battery pack needs to be monitored in real time by the host battery pack, when the battery packs fail, the host battery pack timely feeds back the failure information to the energy storage inverter (PCS), and the PCS can immediately perform power reduction or cut-off load operation so as to ensure the safe operation of the battery packs after the parallel connection.
The current battery pack parallel strategy in the market mainly adopts a strategy of identifying a host and a slave to perform parallel operation through hardware schemes such as a dial switch and the like. The method needs to additionally add a hardware design scheme for distinguishing the master machine from the slave machine, increases production and maintenance cost to a certain extent, increases the parallel machine failure caused by man-made hardware misoperation, and increases the error rate of the parallel machine.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a parallel battery control system, method and apparatus, which can avoid the failure of parallel operation caused by human hardware misoperation, reduce the error rate of parallel operation, and save the production and maintenance costs.
An embodiment of the present application provides a parallel battery pack control method, the parallel battery pack includes a plurality of parallel-connected battery packs, the parallel battery pack control method includes the following steps: when the parallel battery pack is started, acquiring identification code information of a battery pack and a time interval for sending an identification code instruction; controlling the battery pack to send the identification code instruction to other battery packs according to the time interval; and determining one battery pack as a pre-host machine and the other battery packs as pre-slave machines according to the identification code information of each battery pack.
According to some embodiments of the present application, the step of obtaining the identification code information of a battery pack and the time interval for sending the identification code instruction includes: selecting a random value from a battery management system, and generating a first random number and a second random number according to the random value; and setting the first random number as identification code information of the battery pack, and setting the second random number as a time interval for the battery pack to repeatedly send identification code instructions.
According to some embodiments of the present application, the step of selecting a random value from the battery management system and generating the first random number and the second random number according to the random value includes: selecting a random value from a battery management system according to the sampling value of the analog-to-digital converter of the battery pack; a kind of electronic device with high-pressure air-conditioning system
And generating the first random number and the second random number according to the random value.
According to some embodiments of the present application, the step of generating the first random number and the second random number from the random value includes: and inputting the random value as a random factor into a preset random function to generate the first random number and the second random number.
According to some embodiments of the present application, the step of controlling the battery pack to send the identification code instruction to other battery packs according to the time interval further includes: when the battery pack receives the identification code instructions of other battery packs, the battery pack is informed of the identification code information of the battery pack, and the battery pack stops broadcasting the identification code information outwards.
According to some embodiments of the present application, the step of determining one of the battery packs as the pre-master according to the identification code information of each of the battery packs, and the remaining battery packs as the pre-slaves further includes: the pre-master reads the state information of each pre-slave; judging whether the parallel battery pack meets the condition of starting output or not according to the state information of the pre-master machine and the state information of each pre-slave machine; and controlling the output state of the parallel battery pack based on the judgment result.
According to some embodiments of the present application, the step of determining whether the parallel battery pack satisfies a condition for turning on output according to the state information of the pre-master and the state information of each of the pre-slaves includes: judging whether the voltage difference between any two battery packs in the parallel battery packs is smaller than a preset value or not according to the state information of each battery pack; judging whether a fault battery pack exists in the parallel battery packs according to the state information of each battery pack; a kind of electronic device with high-pressure air-conditioning system
And when the voltage difference between any two battery packs in the parallel battery packs is smaller than the preset value and no fault battery pack exists in the parallel battery packs, judging that the parallel battery packs meet the condition of starting output.
According to some embodiments of the application, the step of controlling the output state of the parallel battery pack based on the determination result includes: when the parallel battery pack meets the condition of starting output, controlling the pre-host to start output; and after the pre-host machine successfully starts output, sending a starting instruction to each pre-slave machine so as to control each pre-slave machine to start output.
According to some embodiments of the present application, the parallel battery pack control method further includes: judging whether the pre-host receives a host identification signal sent by the inverter within a preset time; when the pre-host receives the host identification signal sent by the inverter within the preset time, setting the pre-host as a host of the parallel battery pack; when the pre-host does not receive the host identification signal sent by the inverter within the preset time, setting the pre-host as a slave of the parallel battery pack; judging whether a plurality of pre-slaves receive a host identification signal sent by the inverter within the preset time; when a pre-slave receives a host identification signal sent by the inverter within the preset time, setting the pre-slave as a host of the parallel battery pack; and when a preset slave machine does not receive the host identification signal sent by the inverter within the preset time, setting the preset slave machine as the slave machine of the parallel battery pack.
According to some embodiments of the present application, the parallel battery pack control method further includes: the host is controlled to acquire the state information of each slave; judging whether a fault battery pack exists in the parallel battery pack according to the state information of the master machine and the state information of each slave machine; when the host is a fault battery pack, closing the output of each slave; and when the plurality of slaves have the fault battery packs, closing the output of the master and the output of the rest slaves which normally operate.
According to some embodiments of the present application, the parallel battery pack control method further includes: when the parallel battery pack completes the setting of a master machine and a slave machine, setting the sum of the currents of the master machine and each slave machine as the current of the parallel battery pack, setting the lowest state of charge parameter of the master machine and the plurality of slave machines as the state of charge parameter of the parallel battery pack, setting the highest temperature of the master machine and the plurality of slave machines as the highest temperature of the parallel battery pack, setting the lowest temperature of the master machine and the plurality of slave machines as the lowest temperature of the parallel battery pack, setting the maximum battery voltage of the master machine and the plurality of slave machines as the maximum battery voltage of the parallel battery pack, and setting the minimum battery voltage of the master machine and the plurality of slave machines as the minimum battery voltage of the parallel battery pack; setting the maximum voltage of the master machine and the plurality of slave machines to be the voltage of the parallel battery pack when the parallel battery pack is in a charging state; and setting the minimum voltage of the master machine and the slaves to be the voltage of the parallel battery pack when the parallel battery pack is in a discharging state.
According to some embodiments of the present application, the step of controlling the battery pack to send the identification code instruction to other battery packs according to the time interval includes: controlling the battery pack to send the identification code instruction to other battery packs, and timing the sending time and counting the sending times; judging whether the battery pack receives identification code information of other battery packs or not, if not, judging whether the sending time is longer than the time interval and whether the sending times are smaller than preset times or not; when the sending time is longer than the time interval and the sending times are smaller than the preset times, controlling the battery pack to send the identification code instruction to other battery packs again, rechemating the sending time and adding one to the sending times; and outputting parallel operation abnormal warning information when the battery pack does not receive the identification code information of the rest battery packs and the sending times are not less than the preset times.
According to some embodiments of the present application, the step of determining one of the battery packs as the pre-master and the other battery packs as the pre-slaves according to the identification code information of each of the battery packs includes: comparing the size of the identification code information of each battery pack, determining the battery pack with the minimum identification code information as a pre-host computer, and determining the rest battery packs as pre-slave computers; or comparing the sizes of the identification code information of each battery pack, determining the battery pack with the largest identification code information as a pre-host machine, and determining the rest battery packs as pre-slave machines.
An embodiment of the present application provides a parallel battery pack control system, including computer program instructions for being loaded and executed by a parallel battery pack control device to control the parallel battery pack control device to execute the parallel battery pack control method described above.
An embodiment of the present application provides a parallel battery pack control device, including: a memory for storing computer program instructions; and a processor for loading the computer program instructions to execute the parallel battery pack control method described above.
Compared with the prior art, the control system, the control method and the control device for the parallel battery packs have the advantages that when the parallel battery packs are started, each battery pack randomly generates identification code information and compares the identification code information of different battery packs, so that each battery pack is divided into a pre-host machine or a pre-slave machine, the pre-host machine is used for controlling the other pre-slave machines to start and output and activate the energy storage inverter, and then the final physical host machine and the final physical slave machine are determined according to the host machine identification information sent by the energy storage inverter, so that the automatic combination of the battery packs is realized, the combination of the battery packs is realized without adding additional hardware, the combination failure caused by the misoperation of hardware can be avoided, the error rate of the combination is reduced, and meanwhile, the production and maintenance cost can be saved.
Drawings
FIG. 1 is a schematic diagram of a parallel system architecture of a parallel battery pack according to an embodiment of the present application;
FIG. 2 is a flow chart of steps of a method of parallel battery pack control according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a parallel battery control device according to an embodiment of the present application;
fig. 4 is a functional block diagram of a parallel battery control system according to an embodiment of the present application.
Description of the main reference signs
| |
10 |
| |
10a、10b、10c |
| |
20 |
| |
30 |
| Parallel battery |
100 |
| |
101 |
| Processor and method for controlling the same | 102 |
| Parallel battery |
103 |
| |
1031 |
| |
1032 |
| |
1033 |
The following detailed description will further illustrate the application in conjunction with the above-described figures.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It is further intended that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1, fig. 1 is a schematic diagram of a system architecture of a parallel battery pack 10 according to an embodiment of the present application.
The parallel battery pack 10 includes a plurality of battery packs connected in parallel (fig. 1 illustrates only three battery packs 10a, 10b, 10c as an example, and may be more than three or less than three). Each of the battery packs 10a, 10B, or 10c includes a positive electrode b+ and a negative electrode B-, the positive electrode b+ of each of the battery packs 10a-10c being connected together to form the positive electrode of the parallel battery pack 10, and the negative electrode B of each of the battery packs 10a-10c being connected together to form the negative electrode of the parallel battery pack 10. The outputs of the parallel battery pack 10 are bussed to the dc input side of the energy storage inverter 20. Each battery pack 10a-10c is also communicatively coupled to a battery management system 30, thereby enabling the battery management system 30 to manage each battery pack 10a-10 c.
In one embodiment, each of the battery packs 10a-10c further includes an internal bus interface that may implement internal bus communication functions and an external bus interface that may implement external bus communication functions. An internal bus communication function may be used to enable internal communication between each of the battery packs 10a-10c and an external bus communication function may be used to enable communication between the host and the energy storage inverter 20.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a parallel battery pack control method according to an implementation of the present application. The order of the steps in the flow diagrams may be changed, and some steps may be omitted, according to different needs. The parallel battery pack control method may include the following steps.
In step S21, when the parallel battery pack 10 is turned on, the identification code information of a battery pack 10a and the time interval for transmitting the identification code command are obtained.
In one embodiment, when the parallel battery pack 10 is turned on, the time interval for acquiring the identification code information of the battery pack 10a and transmitting the identification code command is taken as an example. It will be appreciated that, when the parallel battery pack 10 is turned on, the identification code information of the battery pack 10b and the time interval for transmitting the identification code instruction, and the identification code information of the battery pack 10c and the time interval for transmitting the identification code instruction may be obtained as well.
In an embodiment, the identification code information may be used as ID information of the battery pack 10a, and the time interval is an interval time when the battery pack 10a repeatedly sends the identification code instruction, where the identification code instruction is preferably a command frame broadcasting local ID information. The time interval is preferably 100-1000 milliseconds.
In one embodiment, the time interval for acquiring the identification code information of the battery pack 10a and transmitting the identification code instruction may be implemented by: a random value is selected from the battery management system 30, and a first random number and a second random number are generated according to the random value, the first random number is set as the identification code information of the battery pack 10a, and the second random number is set as the time interval for the battery pack 10a to repeatedly send the identification code instruction. It will be appreciated that the acquisition of the identification code information of the battery packs 10b, 10c and the time interval for transmitting the identification code instruction may also be implemented in accordance with the above-described manner.
In an embodiment, the generation of the first random number and the second random number according to the random value may be specifically implemented by: according to the sampling value of the analog-to-digital converter of the battery pack 10a (preferably, the integer data of the sampling value is 2.35, for example, the integer data of the sampling value is 2), a random value is selected from the battery management system 30, and the random value is input as a random factor to a preset random function to generate the first random number and the second random number. The predetermined random function is preferably a rand () function, and the analog-to-digital converter may sample the temperature, the current, the voltage, etc. of the battery pack 10a, so as to obtain corresponding sampled values, and then select a random value from the battery management system 30 according to the integer data of the sampled values (such as the sampled values of the temperature, the current, the voltage, etc.) of the analog-to-digital converter of the battery pack 10 a.
For example, the integer data of the sampling value of the analog-to-digital converter may be directly used as a random value, and the random value is used as a random factor to be input into the rand () function to generate the first random number and the second random number; a random value may also be selected from a preset range of values (for example, the preset range of values may be 0-65535) in the battery management system 30 according to the integer data of the sampling value of the analog-to-digital converter, and the random value is input as a random factor to the rand () function to generate the first random number and the second random number.
Step S22, controlling the battery pack 10a to send the identification code instruction to other battery packs (e.g. 10b, 10 c) according to the time interval.
In an embodiment, the battery pack 10a may be controlled to repeatedly send the identification code instruction to the other battery packs 10b, 10c according to the time interval, and the number of repeated sending is preferably not more than 3. When any one of the battery packs 10a receives the identification code command transmitted from the other battery packs 10b, 10c, the other battery packs 10b, 10c are notified of the self-identification code information of the battery pack 10a, and the self-identification code information is stopped from being broadcast outwards.
It will be appreciated that, for the battery pack 10b, the battery pack 10b may be controlled to send the identification code command to the other battery packs 10a and 10c according to the time interval corresponding to the battery pack 10 b; for the battery pack 10c, the battery pack 10c may be controlled to send the identification code command to the other battery packs 10a and 10b according to the time interval corresponding to the battery pack 10 c.
In an embodiment, the control of the battery pack 10a to send the identification code instruction to the other battery packs 10b, 10c according to the time interval may be achieved by: controlling the battery pack 10a to send the identification code instruction to other battery packs 10b and 10c, and timing the sending time and counting the sending times; judging whether the battery pack 10a receives the identification code information of the other battery packs 10b and 10c, if the battery pack 10a does not receive the identification code information of the other battery packs 10b and 10c, further judging whether the transmission time is longer than the time interval and whether the transmission times are smaller than preset times; when the transmission time is longer than the time interval and the transmission times are smaller than the preset times, controlling the battery pack 10a to transmit the identification code instruction to other battery packs 10b and 10c again, re-timing the transmission time, and adding one to the transmission times; when the battery pack 10a does not receive the identification code information of the remaining battery packs 10b and 10c and the number of times of transmission is not less than the preset number of times, the parallel operation is indicated to be abnormal, and parallel operation abnormal warning information can be output. The preset times can be set according to actual use requirements, for example, the preset times are set to 3 times, and can also be other times.
Step S23, determining one battery pack as a pre-host machine and the other battery packs as pre-slave machines according to the identification code information of each battery pack (such as 10a-10 c).
In an embodiment, the determination that one of the battery packs 10a-10c is a pre-master and the remaining battery packs are pre-slaves may be implemented by: comparing the sizes of the identification code information of each of the battery packs 10a-10c, determining the battery pack with the smallest identification code information as a pre-master, and determining the rest battery packs as pre-slaves. For example, if the identification code information of the battery pack 10a is 352, the identification code information of the battery pack 10b is 365, and the identification code information of the battery pack 10c is 477, since the identification code information of the battery pack 10a is smaller than the identification code information of the battery pack 10b and the identification code information of the battery pack 10b is smaller than the identification code information of the battery pack 10c, the battery pack 10a can be determined as the pre-master, and the battery packs 10b and 10c can be determined as the pre-slaves. In other embodiments of the present application, the battery pack having the largest identification information may also be determined as a pre-master, and the remaining battery packs as pre-slaves.
In an embodiment, after the setting of the pre-master and the pre-slave is completed, whether the parallel battery pack 10 meets the condition of starting output is further determined according to the state information of the master and slave; when the parallel battery pack 10 meets the condition of starting output, the pre-master 10a is controlled to start output, and after the pre-master 10a is successfully started to output, a starting command is sent to each pre-slave 10b and 10c to control each pre-slave 10b and 10c to start output.
For example, the pre-master 10a reads the status information of each pre-slave 10b, 10c, and can determine whether the parallel battery pack 10 satisfies the condition of turning on the output according to the status information of the pre-master 10a and the status information of each pre-slave 10b, 10c, and control the output status of the parallel battery pack based on the determination result. The state information of each of the battery packs 10a-10c may include voltage information, current information, temperature information, fault state information, etc. of the battery pack.
In an embodiment, the determination of whether the parallel battery pack 10 satisfies the condition of turning on the output may be specifically implemented by: judging whether the voltage difference between any two battery packs in the parallel battery pack 10 is smaller than a preset value according to the state information of each battery pack 10a-10c, and judging whether a fault battery pack exists in the parallel battery pack 10 according to the state information of each battery pack 10a-10 c; when the voltage difference between any two battery packs in the parallel battery packs 10 is smaller than the preset value and no faulty battery pack exists in the parallel battery packs 10, judging that the parallel battery packs 10 meet the condition of starting output; when the voltage difference between two battery packs in the parallel battery pack 10 is not smaller than the preset value, judging that the parallel battery pack 10 does not meet the condition of starting output; when a faulty battery pack exists in the parallel battery packs 10, it is determined that the parallel battery packs 10 do not satisfy the condition of turning on the output. The preset value may be set in an actual application scenario, for example, according to a current specification of a contactor in a loop, if a voltage difference between two battery packs is too large, an instant heavy current load pulling phenomenon may occur after the output is started, and damage may be caused to hardware of the battery management system 30.
It can be understood that, since the state information of each of the battery packs 10a-10c includes voltage information, current information, temperature information, fault state information, etc. of the battery packs, it is possible to determine whether the voltage difference between any two battery packs in the parallel battery pack 10 is smaller than a preset value and determine whether a faulty battery pack exists in the parallel battery pack 10 according to the state information of each of the battery packs 10a-10 c.
It will be appreciated that, if the parallel battery pack 10 includes three battery packs 10a-10c, it is necessary to determine whether the voltage difference between the battery packs 10a, 10b is smaller than the preset value, determine whether the voltage difference between the battery packs 10b, 10c is smaller than the preset value, and determine whether the voltage difference between the battery packs 10a, 10c is smaller than the preset value. When the voltage difference between the battery packs 10a, 10b is smaller than the preset value, the voltage difference between the battery packs 10b, 10c is smaller than the preset value, and the voltage difference between the battery packs 10a, 10c is smaller than the preset value, it is indicated that the voltage difference between any two battery packs in the parallel battery pack 10 is smaller than the preset value.
In one embodiment, after the pre-master 10a and the pre-slaves 10b, 10c turn on the output, the energy storage inverter 20 is activated and further determines which of the plurality of battery packs 10a-10c is physically the master of the parallel battery pack 10 and which is physically the slave of the parallel battery pack 10 to complete the parallel operation of the battery packs 10a-10 c. When the energy storage inverter 20 is activated and the start-up is completed, the energy storage inverter 20 may periodically send out a host indication signal, and when any one battery pack receives the host indication signal, the battery pack will be set as a host in a physical sense, and the remaining battery packs will be set as slaves in a physical sense.
In an embodiment, setting the master and slave in a physical sense may be achieved by: judging whether the pre-host 10a receives a host identification signal sent by the energy storage inverter 20 within a preset time, setting the pre-host 10a as a host of the parallel battery pack 10 when the pre-host 10a receives the host identification signal sent by the energy storage inverter 20 within the preset time, and setting the pre-host 10a as a slave of the parallel battery pack 10 when the pre-host 10a does not receive the host identification signal sent by the energy storage inverter 20 within the preset time; judging whether or not the plurality of pre-slaves 10b, 10c receive the host identification signal sent by the energy storage inverter 20 within the preset time, setting the pre-slaves 10b as a host of the parallel battery pack 10 when the pre-slaves 10b receive the host identification signal sent by the energy storage inverter 20 within the preset time, and setting the pre-slaves 10b as a slave of the parallel battery pack 10 when the pre-slaves 10b do not receive the host identification signal sent by the energy storage inverter 20 within the preset time. It will be appreciated that the determination rule of the pre-slave 10c is the same as that of the pre-slave 10b, and will not be described in detail here.
The following exemplifies that the pre-master 10a is set as the master of the parallel battery pack 10 and the pre-slaves 10b, 10c are set as the slaves of the parallel battery pack 10. When the parallel battery pack 10 completes the master and slave set-up, the sum of the currents of the master 10a and each of the slaves 10b, 10c may be set as the current of the parallel battery pack 10, the lowest state-of-charge parameter of the master 10a, the slaves 10b, 10c may be set as the state-of-charge parameter of the parallel battery pack 10, the highest temperature of the master 10a, the slaves 10b, 10c may be set as the highest temperature of the parallel battery pack 10, the lowest temperature of the master 10a, the slaves 10b, 10c may be set as the lowest temperature of the parallel battery pack 10, the maximum battery voltage of the master 10a, the slaves 10b, 10c may be set as the maximum battery voltage of the parallel battery pack 10, and the minimum battery voltage of the master 10a, the slaves 10b, 10c may be set as the minimum battery voltage of the parallel battery pack 10. When the parallel battery pack 10 is in a charged state, the maximum voltage in the master 10a, slaves 10b, 10c may be set to the voltage of the parallel battery pack 10; when the parallel battery pack 10 is in a discharge state, the minimum voltage among the master 10a, slaves 10b, 10c may be set to the voltage of the parallel battery pack 10.
In an embodiment, after the parallel battery pack 10 completes the setting of the master and the slave, the master 10a is controlled to obtain the status information of each slave 10b, 10c, and determine whether a faulty battery pack exists in the parallel battery pack 10 according to the status information of the master 10a and the status information of each slave 10b, 10 c; when the master 10a is a faulty battery pack, the output of each slave 10b, 10c is turned off, and when a plurality of slaves 10b, 10c have faulty battery packs, the output of the master 10a and the outputs of the other slaves that are operating normally are turned off, so as to avoid damage to other normal battery packs caused by the faulty battery packs in the parallel battery packs 10 after the setting of the master and the slaves is completed.
According to the control method for the parallel battery packs, when the parallel battery packs are started, each battery pack randomly generates an ID value and performs ID competition so as to divide each battery pack into the pre-master machine or the pre-slave machine, meanwhile, the pre-master machine is used for controlling other pre-slave machines to start and output to activate the energy storage inverter, and then the final physical master machine and the final physical slave machine are determined according to the host machine identification information sent by the energy storage inverter, so that the automatic parallel connection of the battery packs is successful, no additional hardware is required to be added to realize the parallel connection, the parallel connection failure caused by hardware misoperation can be avoided, the error rate of parallel connection is reduced, and meanwhile, the production and maintenance cost can be saved.
Fig. 3 is a schematic diagram of a parallel battery pack control device 100 according to an embodiment of the present application. The parallel battery control device 100 comprises a memory 101, a processor 102 and a computer program stored in the memory 101 and executable on the processor 102, such as a parallel battery control system 103.
The processor 102, when executing the computer program, implements the steps of the parallel battery control method embodiment described above, such as steps S21-S23 shown in fig. 2.
Referring also to fig. 4, in one embodiment, the parallel battery control system 103 may be partitioned into one or more modules that may be stored in the memory 101 and executed by the processor 102 to complete the present application. The one or more modules may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the parallel battery control system 103 in the parallel battery control device 100. For example, the parallel battery control system 103 may be partitioned into an acquisition module 1031, a control module 1032, and a determination module 1033 in fig. 4.
The acquiring module 1031 is configured to acquire the identification code information of the battery pack 10a (10 a is taken as an example for illustration) and the time interval for sending the identification code command when the parallel battery pack 10 is powered on.
The control module 1032 is configured to control the battery pack 10a to send the identification code instruction to the other battery packs 10b and 10c according to the time interval.
The determining module 1033 is configured to determine that one of the battery packs is a pre-master and the other battery packs are pre-slaves according to the identification code information of each of the battery packs 10a-10 c.
After the pre-master and pre-slave are set, the physical master and slave can be determined continuously, and the specific content can be seen from the embodiment of the parallel battery pack control method, which is not described in detail herein.
In one embodiment, the processor 102 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor 102 may be any other conventional processor or the like.
The memory 101 may include random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid state storage device.
The modules integrated with the parallel battery pack control device 100 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a separate product. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each method embodiment described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
According to the parallel battery pack control device, when the parallel battery packs are started, each battery pack randomly generates an ID value and performs ID competition so as to divide each battery pack into the pre-master machine or the pre-slave machine, meanwhile, the pre-master machine is used for controlling other pre-slave machines to start and output to activate the energy storage inverter, and then the final physical master machine and the final physical slave machine are determined according to the host machine identification information sent by the energy storage inverter, so that the automatic parallel connection of the battery packs is realized, the parallel connection of the battery packs is realized without adding extra hardware, the parallel connection failure caused by the misoperation of hardware can be avoided, the error rate of parallel connection is reduced, and meanwhile, the production and maintenance cost can be saved.
It will be appreciated that the above described division of modules is merely a logical division of functions and that other divisions of implementation are possible. In addition, each functional module in each embodiment of the present application may be integrated in the same processing unit, or each module may exist alone physically, or two or more modules may be integrated in the same unit. The integrated modules may be implemented in hardware or in hardware plus software functional modules.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The above-described embodiments of the application are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (14)
1. A parallel battery pack control method, the parallel battery pack including a plurality of parallel-connected battery packs, characterized by comprising the steps of:
when the parallel battery pack is started, acquiring identification code information of a battery pack and a time interval for sending an identification code instruction;
controlling the battery pack to send the identification code instruction to other battery packs according to the time interval; a kind of electronic device with high-pressure air-conditioning system
Determining one battery pack as a pre-host machine according to the identification code information of each battery pack, and the other battery packs as pre-slave machines;
when the pre-master and the pre-slave are started to output, the inverter is activated and periodically sends out a master marking signal;
when any one battery pack receives the host indication signal, the battery pack is set as a host in a physical sense, and the rest battery packs are set as slaves in the physical sense;
the step of controlling the battery pack to send the identification code instruction to other battery packs according to the time interval comprises the following steps:
controlling the battery pack to send the identification code instruction to other battery packs, and timing the sending time and counting the sending times;
judging whether the battery pack receives identification code information of other battery packs or not, if not, judging whether the sending time is longer than the time interval and whether the sending times are smaller than preset times or not;
when the sending time is longer than the time interval and the sending times are smaller than the preset times, controlling the battery pack to send the identification code instruction to other battery packs again, rechemating the sending time and adding one to the sending times;
and outputting parallel operation abnormal warning information when the battery pack does not receive the identification code information of the rest battery packs and the sending times are not less than the preset times.
2. The parallel battery pack control method as set forth in claim 1, wherein the step of acquiring identification code information of a battery pack and a time interval for transmitting the identification code instruction comprises:
selecting a random value from a battery management system, and generating a first random number and a second random number according to the random value; a kind of electronic device with high-pressure air-conditioning system
The first random number is set as identification code information of the battery pack, and the second random number is set as a time interval for the battery pack to repeatedly send identification code instructions.
3. The method of controlling a parallel battery pack according to claim 2, wherein the step of selecting a random value from the battery management system and generating the first random number and the second random number according to the random value comprises:
selecting a random value from a battery management system according to the sampling value of the analog-to-digital converter of the battery pack; a kind of electronic device with high-pressure air-conditioning system
And generating the first random number and the second random number according to the random value.
4. The parallel battery pack control method of claim 3, wherein the step of generating the first random number and the second random number from the random value includes:
and inputting the random value as a random factor into a preset random function to generate the first random number and the second random number.
5. The parallel battery pack control method according to claim 1, wherein the step of controlling the battery pack to transmit the identification code instruction to the other battery packs according to the time interval further comprises:
when the battery pack receives the identification code instructions of other battery packs, the battery pack is informed of the identification code information of the battery pack, and the battery pack stops broadcasting the identification code information outwards.
6. The method for controlling parallel battery packs according to claim 1, wherein the step of determining one of the battery packs as a pre-master and the remaining battery packs as pre-slaves according to the identification code information of each of the battery packs further comprises:
the pre-master reads the state information of each pre-slave;
judging whether the parallel battery pack meets the condition of starting output or not according to the state information of the pre-master machine and the state information of each pre-slave machine; a kind of electronic device with high-pressure air-conditioning system
And controlling the output state of the parallel battery pack based on the judgment result.
7. The method of controlling a parallel battery pack according to claim 6, wherein the step of judging whether the parallel battery pack satisfies a condition of turning on an output based on the state information of the pre-master and the state information of each of the pre-slaves comprises:
judging whether the voltage difference between any two battery packs in the parallel battery packs is smaller than a preset value or not according to the state information of each battery pack;
judging whether a fault battery pack exists in the parallel battery packs according to the state information of each battery pack; a kind of electronic device with high-pressure air-conditioning system
And when the voltage difference between any two battery packs in the parallel battery packs is smaller than the preset value and no fault battery pack exists in the parallel battery packs, judging that the parallel battery packs meet the condition of starting output.
8. The parallel battery pack control method according to claim 6, wherein the step of controlling the output state of the parallel battery pack based on the determination result includes:
when the parallel battery pack meets the condition of starting output, controlling the pre-host to start output; a kind of electronic device with high-pressure air-conditioning system
And after the pre-host successfully starts output, sending a starting instruction to each pre-slave so as to control each pre-slave to start output.
9. The parallel battery pack control method of claim 8, wherein the method further comprises:
judging whether the pre-host receives a host identification signal sent by the inverter within a preset time;
when the pre-host receives the host identification signal sent by the inverter within the preset time, setting the pre-host as a host of the parallel battery pack;
when the pre-host does not receive the host identification signal sent by the inverter within the preset time, setting the pre-host as a slave of the parallel battery pack;
judging whether a plurality of pre-slaves receive a host identification signal sent by the inverter within the preset time;
when a pre-slave receives a host identification signal sent by the inverter within the preset time, setting the pre-slave as a host of the parallel battery pack; a kind of electronic device with high-pressure air-conditioning system
And when the preset slave machine does not receive the host identification signal sent by the inverter within the preset time, setting the preset slave machine as the slave machine of the parallel battery pack.
10. The parallel battery pack control method of claim 9, wherein the method further comprises:
the host is controlled to acquire the state information of each slave;
judging whether a fault battery pack exists in the parallel battery pack according to the state information of the master machine and the state information of each slave machine;
when the host is a fault battery pack, closing the output of each slave; a kind of electronic device with high-pressure air-conditioning system
And when a plurality of slaves have a fault battery pack, closing the output of the master and the output of the rest slaves which normally operate.
11. The parallel battery pack control method of claim 9, wherein the method further comprises:
when the parallel battery pack completes the setting of a master machine and a slave machine, setting the sum of the currents of the master machine and each slave machine as the current of the parallel battery pack, setting the lowest state of charge parameter of the master machine and the plurality of slave machines as the state of charge parameter of the parallel battery pack, setting the highest temperature of the master machine and the plurality of slave machines as the highest temperature of the parallel battery pack, setting the lowest temperature of the master machine and the plurality of slave machines as the lowest temperature of the parallel battery pack, setting the maximum battery voltage of the master machine and the plurality of slave machines as the maximum battery voltage of the parallel battery pack, and setting the minimum battery voltage of the master machine and the plurality of slave machines as the minimum battery voltage of the parallel battery pack;
setting the maximum voltage of the master machine and the plurality of slave machines to be the voltage of the parallel battery pack when the parallel battery pack is in a charging state; a kind of electronic device with high-pressure air-conditioning system
And setting the minimum voltage of the master machine and the slaves to be the voltage of the parallel battery pack when the parallel battery pack is in a discharging state.
12. The method of controlling parallel battery packs as claimed in claim 1, wherein the step of determining one of the battery packs as a pre-master and the remaining battery packs as pre-slaves according to the identification code information of each of the battery packs comprises:
comparing the size of the identification code information of each battery pack, determining the battery pack with the minimum identification code information as a pre-host computer, and determining the rest battery packs as pre-slave computers; or (b)
And comparing the sizes of the identification code information of each battery pack, determining the battery pack with the largest identification code information as a pre-host machine, and determining the rest battery packs as pre-slave machines.
13. A parallel battery control system comprising computer program instructions for load execution by a parallel battery control device to control the parallel battery control device to perform a parallel battery control method as claimed in any one of claims 1-12.
14. A parallel battery pack control device, comprising:
a memory for storing computer program instructions; a kind of electronic device with high-pressure air-conditioning system
A processor for loading the computer program instructions to perform the parallel battery pack control method of any one of claims 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115179.8A CN111564857B (en) | 2019-02-14 | 2019-02-14 | Parallel battery pack control system, method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115179.8A CN111564857B (en) | 2019-02-14 | 2019-02-14 | Parallel battery pack control system, method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111564857A CN111564857A (en) | 2020-08-21 |
| CN111564857B true CN111564857B (en) | 2023-06-20 |
Family
ID=72072876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910115179.8A Active CN111564857B (en) | 2019-02-14 | 2019-02-14 | Parallel battery pack control system, method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564857B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271223B (en) * | 2021-05-13 | 2022-06-21 | 石家庄通合电子科技股份有限公司 | Unified communication management method for charging module and terminal equipment |
| CN117220372A (en) * | 2023-09-14 | 2023-12-12 | 云储新能源科技有限公司 | Energy storage system and management method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101438219A (en) * | 2006-03-10 | 2009-05-20 | 爱特梅尔公司 | Random number generator in a battery pack |
| JP2014068466A (en) * | 2012-09-26 | 2014-04-17 | Asti Corp | Charge device |
| CN106169795A (en) * | 2016-09-13 | 2016-11-30 | 沃太能源南通有限公司 | A kind of energy-storage lithium battery group and expansion method thereof |
| CN108418250A (en) * | 2018-04-12 | 2018-08-17 | 浙江正泰电器股份有限公司 | Distributed home energy-storage system |
| CN108599212A (en) * | 2018-04-12 | 2018-09-28 | 浙江正泰电器股份有限公司 | Energy-storage system |
| CN108683203A (en) * | 2018-04-12 | 2018-10-19 | 浙江正泰电器股份有限公司 | Energy-storage system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102479719B1 (en) * | 2015-06-04 | 2022-12-21 | 삼성에스디아이 주식회사 | System and Method for Controlling Battery |
-
2019
- 2019-02-14 CN CN201910115179.8A patent/CN111564857B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101438219A (en) * | 2006-03-10 | 2009-05-20 | 爱特梅尔公司 | Random number generator in a battery pack |
| JP2014068466A (en) * | 2012-09-26 | 2014-04-17 | Asti Corp | Charge device |
| CN106169795A (en) * | 2016-09-13 | 2016-11-30 | 沃太能源南通有限公司 | A kind of energy-storage lithium battery group and expansion method thereof |
| CN108418250A (en) * | 2018-04-12 | 2018-08-17 | 浙江正泰电器股份有限公司 | Distributed home energy-storage system |
| CN108599212A (en) * | 2018-04-12 | 2018-09-28 | 浙江正泰电器股份有限公司 | Energy-storage system |
| CN108683203A (en) * | 2018-04-12 | 2018-10-19 | 浙江正泰电器股份有限公司 | Energy-storage system |
Non-Patent Citations (1)
| Title |
|---|
| 基于多Agent的风力/太阳能互补发电场能量管理系统;陈华等;《电力自动化设备》;20070810(第08期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111564857A (en) | 2020-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11524588B2 (en) | Wireless battery management system and battery pack including same | |
| KR101075352B1 (en) | Battery multi-series system and communication method thereof | |
| CN111431228B (en) | Parallel battery pack charge and discharge management method and electronic device | |
| EP2793309B1 (en) | System for automatically recognizing battery characteristic, battery information storage device for the same, and method for automatically optimizing battery management device by using the same | |
| CN110999023A (en) | Method and device for balancing the state of charge of individual cells of a battery system | |
| CN111564857B (en) | Parallel battery pack control system, method and device | |
| EP3644183B1 (en) | Apparatus and method for diagnosing communication abnormality | |
| CN105150874A (en) | Power battery management system and power supply control method thereof | |
| EP3096431B1 (en) | Battery management unit and method for setting identifier by using frequency modulation | |
| US20220314832A1 (en) | Battery control system, battery pack, electric vehicle, and id setting method for the battery control system | |
| US10218039B2 (en) | Method and apparatus for detecting state of safety plug | |
| TWI610514B (en) | Energy storage system and battery balancing and repairing method | |
| CN105612677A (en) | Battery management unit for preventing performance of erroneous control algorithm from communication error | |
| CN116418108A (en) | Power conversion circuit, energy storage device and cut-off control method of battery pack | |
| CN115276181A (en) | Parallel operation control method, device and equipment of battery pack and storage medium | |
| CN115800419A (en) | Identifier setting system | |
| CN115525461A (en) | Anomaly detection method for energy storage device and server | |
| JP2018117485A (en) | Storage battery module and storage battery system including the same | |
| CN117559541B (en) | Whole package utilization system of retired power battery package | |
| KR20140122520A (en) | Apparatus and Method for balancing using voltage difference | |
| CN217087559U (en) | Energy storage device and power supply system | |
| US20240083302A1 (en) | Advanced Battery Bank and Management Thereof | |
| US20240106254A1 (en) | Power Storage System | |
| CN114709890A (en) | Method and device for balancing battery electric quantity in multi-machine parallel system | |
| CN116418091A (en) | Battery pack charging control method, energy storage system and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |