CN114201194A - Parallel operation system upgrading method and device and parallel operation system - Google Patents
Parallel operation system upgrading method and device and parallel operation system Download PDFInfo
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- CN114201194A CN114201194A CN202111406657.4A CN202111406657A CN114201194A CN 114201194 A CN114201194 A CN 114201194A CN 202111406657 A CN202111406657 A CN 202111406657A CN 114201194 A CN114201194 A CN 114201194A
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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Abstract
The embodiment of the application relates to the technical field of energy storage, in particular to a parallel operation system upgrading method and device and a parallel operation system. The method comprises the following steps: receiving a firmware upgrade file; confirming the battery pack successfully connected with the inversion unit; the battery pack successfully connected with the inversion unit is upgraded based on the firmware upgrading file; for the battery pack successfully connected with the inverter unit, confirming other battery packs except for the battery pack in the upgrading preparation; and adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs. By the mode, the battery pack can be upgraded successively, other battery packs in non-upgrading can still be connected to the parallel operation system, and the power parameter of the inverter unit is adjusted according to other battery packs, so that the risk of overpower of the parallel operation system is reduced, and the safety of the parallel operation system in firmware upgrading is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of energy storage, in particular to a parallel operation system upgrading method and device and a parallel operation system.
Background
In the technical field of energy storage, a parallel operation system is a system which connects a plurality of battery packs together in parallel so as to conveniently supply power to a load. The battery pack comprises a control unit and a battery module, and the external equipment comprises an inverter, a power grid, a photovoltaic power generation system and the like and can charge the battery module. The control unit is used for managing the charging and discharging of the battery module. With the update and upgrade of the load or the external device, the control unit in the parallel operation system needs to perform firmware upgrade accordingly.
Disclosure of Invention
In carrying out the present application, the applicant has found that: when firmware upgrading is carried out on the parallel operation system, the parallel operation system needs to be powered off, so that the safety of the parallel operation system is guaranteed, the parallel operation system is not beneficial to being applied to an environment where power cannot be off, upgrading time needs to be reserved with a user in advance, the power consumption of the user is affected, and the user experience is reduced.
In view of the foregoing problems, embodiments of the present application provide a method and an apparatus for upgrading a parallel operation system, and a parallel operation system, so as to solve the above technical problems encountered when upgrading a firmware of a parallel operation system.
According to one aspect of the embodiment of the application, a parallel machine system upgrading method is provided. The parallel operation system comprises a plurality of battery packs electrically connected with an inversion unit, each battery pack comprises a control unit and a battery module, and the control units are respectively electrically connected with the battery modules and the inversion unit. The method comprises the following steps: and receiving a firmware upgrading file, and confirming the battery pack successfully connected with the inversion unit, wherein the battery pack successfully connected with the inversion unit is upgraded based on the firmware upgrading file. And for the battery packs which are successfully connected with the inverter unit, confirming other battery packs except for the upgrading preparation, and adjusting the power parameters of the parallel operation system according to the power parameters of each battery pack in the other battery packs.
Through the mode, in the process of upgrading the battery pack, firstly, the battery pack in the upgrading preparation and other battery packs except the battery pack in the upgrading preparation are confirmed, and then the power parameters of the parallel operation system are adjusted according to the power parameters of the battery packs in the other battery packs, so that the parallel operation system can upgrade the battery pack under the condition of no power outage, namely, in the process of upgrading the firmware of the parallel operation system, the inverter unit can still discharge the parallel operation system in real time. Meanwhile, because the power parameters of the parallel operation system are adjusted when the battery pack in the upgrading preparation is upgraded, the phenomenon that other battery packs have over-power due to the fact that the output power of the inversion unit is too high can be avoided, the risk of over-power of the parallel operation system is reduced, and the safety of the parallel operation system in firmware upgrading is improved.
Wherein the power parameter may be a maximum charge-discharge power (SOP) (State of Power).
In an alternative, the battery packs in the parallel system are connected in parallel.
In an optional mode, the inverter unit includes an inverter, each battery pack in the parallel machine system includes a main battery pack, the main battery pack is in communication connection with the inverter through a communication line, the battery packs except the main battery pack are slave battery packs, and each slave battery pack is in communication connection with the main battery pack through a communication line.
In an alternative mode, the control unit in the main battery pack is a main control unit, and the main control unit can receive a firmware upgrade file so that the main control unit can upgrade the firmware.
In an alternative mode, the control units in the slave battery packs are slave control units, and the master control unit may send the received firmware upgrade file to each slave control unit, so that each slave control unit can perform firmware upgrade.
In an alternative, the power parameter includes a maximum discharge current and a maximum charge current. Adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs, further comprising: and/or acquiring a second minimum value of the maximum charging current of each battery pack in the other battery packs, and multiplying the number of the other battery packs with the second minimum value to acquire the maximum charging current allowed by the parallel operation system. Wherein the maximum discharge current allowed by the inverter is equal to the maximum discharge current allowed by the parallel operation system, the maximum charge current allowed by the inverter is equal to the maximum charge current allowed by the parallel operation system, and the SOP value of the inverter includes: the product of the maximum discharge current allowed by the inverter and the voltage of the inverter, and the product of the maximum discharge current allowed by the inverter and the voltage of the inverter.
In an optional manner, controlling the battery pack successfully connected to the inverter unit to be upgraded based on the firmware upgrade file further includes: and acquiring an identifier of the battery pack, wherein the identifier of the battery pack comprises an address of a control unit of the battery pack, and gradually upgrading the battery pack successfully connected with the inverter unit according to the identifier of the battery pack. According to the sequence of the addresses, the obtained battery pack is gradually upgraded, and the condition that the battery pack is not upgraded or is upgraded for many times can be effectively reduced.
In an optional manner, the parallel operation system upgrading method further includes: and when the upgrading of a battery pack in certain upgrading preparation is completed, accessing the upgraded battery pack into a power loop of the inverter unit. One of the battery packs can be timely incorporated into the inverter unit after the upgrade is completed.
In an optional manner, before the battery pack successfully connected to the inverter unit is upgraded based on the firmware upgrade file, the parallel operation system upgrading method further includes: controlling an operation of confirming the battery pack in preparation for upgrade and other battery packs except the battery pack in preparation for upgrade based on whether the parallel operation system is in a stationary state. And if the parallel operation system is in a standing state, performing the operation of confirming the battery pack in the upgrading preparation and other battery packs except the battery pack in the upgrading preparation. The static state is a state in which each battery pack in the parallel system is neither charged nor discharged. The parallel operation system is upgraded only when the parallel operation system is in a standing state through setting, so that the safety of upgrading the parallel operation system is improved.
In an optional manner, before controlling operations of confirming the battery pack in preparation for upgrading and other battery packs except the battery pack in preparation for upgrading based on whether the parallel operation system is in a still state, the parallel operation system upgrading method further includes: and acquiring the current of the parallel operation system, and judging whether the absolute value of the current is smaller than a first value. If yes, the parallel operation system is in a standing state; if not, the parallel operation system is not in a standing state. The first value is a basis for judging whether the parallel operation system is in a standing state. When the current of the parallel operation system is smaller than the first value, the parallel operation system is determined to be in a standing state, and subsequent steps are executed, so that the safety of upgrading the parallel operation system is improved.
In an alternative, the first value may take on the value of 1 a.
In an optional manner, before the obtaining of the battery pack successfully connected to the inverter unit, the parallel operation system upgrading method further includes: and acquiring a battery pack which is not successfully connected with the inverter unit, and controlling the battery pack which is not successfully connected with the inverter unit to be upgraded based on the firmware upgrade file. Before the battery packs which are successfully connected with the inversion unit are successively upgraded, the battery packs which are not successfully connected with the inversion unit are upgraded based on the firmware upgrade file, and therefore the firmware of the control units of all the battery packs in the parallel operation system is upgraded.
In an optional manner, after obtaining the battery pack that is not successfully connected to the inverter unit, the method further includes: and after the battery pack successfully connected with the inverter unit is upgraded, upgrading the battery pack which is not successfully connected with the inverter unit.
In an optional manner, the parallel operation system upgrading method further includes: and checking the firmware upgrading file based on the received fool-proof information, and controlling to obtain the battery pack successfully connected with the inverter unit based on a checking result. If the check is passed, acquiring a battery pack accessed to a power loop of the inverter; and if the verification fails, returning error information of the firmware upgrading file. If the verification is passed, the firmware upgrading file is correct, or the firmware upgrading file can be used for upgrading the firmware of the parallel operation system, so that the safety of upgrading the firmware of the parallel operation system is improved. If the verification fails, the error information of the firmware upgrading file is returned, so that maintenance personnel of the parallel system can adjust the firmware upgrading file in time.
In an optional manner, before obtaining the battery pack successfully connected to the inverter unit, the parallel operation system upgrading method further includes: and acquiring the existing firmware version in the battery pack, judging whether the firmware version of the firmware upgrade file is consistent with the existing firmware version, and controlling the operation of acquiring the battery pack successfully connected with the inverter unit based on the judgment result. If the firmware version of the firmware upgrading file is inconsistent with the existing firmware version, acquiring a battery pack successfully connected with an inverter unit; and if the firmware version of the firmware upgrading file is consistent with the existing firmware version, returning firmware upgrading file error information. The method comprises the steps that the existing firmware version is version information of existing firmware in a control unit of a battery pack, when the firmware version of a firmware upgrading file is inconsistent with the acquired firmware version in the battery pack, the firmware of the control unit in the battery pack needs to be upgraded, the battery pack which is successfully connected with an inverter unit is acquired to perform subsequent operation, and when the firmware version of the firmware upgrading file is consistent with the acquired firmware version in the battery pack, the operation is finished, so that the firmware upgrading of the battery pack which does not need to be performed is not performed, and the efficiency of upgrading the parallel operation system is improved.
According to another aspect of the embodiments of the present application, there is provided an upgrading apparatus of a parallel operation system, the parallel operation system includes a plurality of battery packs electrically connected to an inverter unit, each battery pack includes a control unit and a battery module, the control unit is electrically connected to the battery module and the inverter, respectively, and the upgrading apparatus includes a receiving module, a first confirming module, an upgrading module, a second confirming module, and an adjusting module. The system comprises a receiving module, a first confirming module, an upgrading module, a second confirming module and an adjusting module, wherein the receiving module is used for receiving a firmware upgrading file, the first confirming module is used for confirming a battery pack which is successfully connected with an inversion unit, the upgrading module is used for upgrading the battery pack which is successfully connected with the inversion unit based on the firmware upgrading file, the second confirming module is used for confirming other battery packs except for the battery pack in upgrading preparation for the battery pack which is successfully connected with the inversion unit, and the adjusting module is used for adjusting power parameters of the parallel operation system according to power parameters of all battery packs in the other battery packs. By the device, the battery pack can be upgraded successively, the power parameters of the parallel operation system are adjusted by confirming the battery pack in the upgrade preparation and other battery packs except the battery pack in the upgrade preparation, and the battery pack in the upgrade preparation is controlled to be upgraded based on the firmware upgrade file, so that the battery pack can be upgraded successively, when a certain battery pack is upgraded, other battery packs do not need to be powered off, the parallel operation system can still be accessed, and the power parameters of the parallel operation system are adjusted according to other battery packs, so that the risk of overpower of the parallel operation system can be reduced, and the safety of the parallel operation system during firmware upgrade can be improved.
According to still another aspect of an embodiment of the present application, there is provided a parallel operation system including an inverter and a plurality of battery packs. The battery pack comprises a control unit and a battery module, and the control unit is electrically connected with the battery module and the inverter respectively; the control unit is used for executing the parallel machine system upgrading method.
The beneficial effects of the embodiment of the application include: different from the existing parallel operation system upgrading method, the battery pack successfully connected with the inversion unit is confirmed by receiving the firmware upgrading file, and the battery pack successfully connected with the inversion unit is upgraded based on the firmware upgrading file; and for the battery pack successfully connected with the inverter unit, confirming other battery packs except for the battery pack in the upgrading preparation, and adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs to realize the successive upgrading of the battery pack successfully connected with the inverter unit. When one battery pack is upgraded, other battery packs can still be connected to the parallel operation system, and the power parameter of the parallel operation system is adjusted according to the other battery packs, so that the risk of overpower of the parallel operation system can be reduced, and the safety of the parallel operation system in firmware upgrading is improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic diagram of an implementation manner of a parallel operation system provided by an embodiment of the present application;
fig. 2 is a schematic diagram of another implementation manner of a parallel operation system provided by an embodiment of the present application;
fig. 3 is a schematic flowchart of a parallel operation system upgrading method according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating a method for verifying a firmware upgrade file according to an embodiment of the present application;
fig. 5 is a flowchart illustrating a method for determining a firmware upgrade file version according to an embodiment of the present application;
FIG. 6 is a flowchart illustrating a method for determining a firmware upgrade file version according to another embodiment of the present application;
fig. 7 is a schematic flowchart of another parallel operation system upgrading method provided in an embodiment of the present application;
fig. 8 is a schematic flowchart of a method for determining whether a parallel operation system is in a static state according to an embodiment of the present application;
fig. 9 is a schematic flowchart of a method for upgrading a battery pack according to an embodiment of the present disclosure;
fig. 10 is a schematic diagram of a parallel operation system upgrading apparatus provided in an embodiment of the present application;
fig. 11 is a schematic hardware structure diagram of a control unit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail and clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In addition, the technical features mentioned in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, according to an embodiment of the present application, a parallel operation system includes a plurality of battery packs electrically connected to an inverter unit, which is, for example, an inverter, and the inverter may be electrically connected to the plurality of battery packs through a bus, and a switch, which may be a relay, is disposed on the bus where each battery pack is connected to the inverter. The inverter is communicatively coupled to the at least one battery pack.
The inverter can be used for interconversion between alternating current and direct current. The inverter can provide electric energy for external electric equipment when converting direct current output by the battery pack into alternating current, and can charge the battery pack when converting the external alternating current into the direct current. In the embodiment of the application, the inverter is further used for matching the corresponding Power for the battery pack according to the maximum charge-discharge Power (SOP) fed back by the battery pack.
For the plurality of battery packs, each battery pack comprises a control unit and a plurality of battery modules connected in series, the control unit is electrically connected with the battery modules in a single battery pack, and the control unit is used for managing charging and discharging of the battery modules.
Wherein, the battery module includes at least one electricity core. When the battery module includes a plurality of battery cores, the plurality of battery cores are connected in series and/or in parallel.
In some embodiments, one of the plurality of battery packs that is communicatively connected to the upper computer is a master battery pack, and the other battery packs are slave battery packs. The control unit in the main battery pack is a main control unit, and the control unit in the auxiliary battery pack is an auxiliary control unit. As illustrated in fig. 2, the battery pack 1 and the control unit 1 respectively serve as a master battery pack and a master control unit in the parallel system, and the battery pack 2, the battery pack 3, the control unit 2, the control unit 3, and the like respectively serve as a slave battery pack and a slave control unit in the parallel system.
The main battery pack is in communication connection with the inverter through a communication line, and each auxiliary battery pack is in communication connection with the main battery pack through the communication line.
In other embodiments, the plurality of battery packs may be in a parallel relationship without distinguishing between the master battery pack and the slave battery pack, each battery pack being communicatively coupled to the inverter. The parallel operation system upgrading method provided by the embodiment of the application can be applied to whether the main battery pack and the auxiliary battery pack are distinguished or not.
For the plurality of battery packs, the battery packs can be connected in parallel, the battery packs are electrically connected with the inverter through the bus after being connected in parallel, and the voltages of the battery packs are basically consistent. In one embodiment, as illustrated in fig. 2, current flows from the inverter, through the bus bar, into the positive terminal of the battery pack, out of the negative terminal of the battery pack, through the bus bar, back to the inverter, and thus forms part of the power circuit.
Referring to fig. 2, in some embodiments, the main battery pack is further communicatively connected to the upper computer through a communication line, and the main battery pack is configured to receive a firmware upgrade file or fool-proof information from the upper computer, so as to upgrade the firmware of the main battery pack. The main battery pack can transmit the firmware upgrading file to the auxiliary battery pack through the communication line so as to upgrade the firmware of the auxiliary battery pack. When the battery pack is upgraded, the switch on the corresponding bus is controlled to be switched off so as to disconnect the power loop of the inverter, and optionally, the switch can be a relay.
In some embodiments, the master control unit may further obtain a power parameter of the slave battery pack, or the slave control unit may transmit the power parameter of the slave battery pack corresponding to the slave control unit to the master control unit, so that the inverter matches a suitable power parameter for the battery pack, where the power parameter may be a maximum charge and discharge power SOP value including a maximum discharge power and a maximum charge power.
In some embodiments, the control units in the master battery pack and the slave battery pack have unique addresses, and the addresses of the control units can be used for identifying the battery packs, so that firmware upgrade of the control units in the battery packs is facilitated. For example, the address of the master control unit is "0", the address of the slave control unit may be "1", "2", "3", "4", "5", … …, and the address of the control unit may also be in other expressions, which is not limited herein.
In the related art, in the process of charging and discharging the battery packs, if firmware upgrade is performed on one or more battery packs, all the battery packs need to be powered off to ensure the safety of the parallel operation system, and when the firmware upgrade is performed on the parallel operation system, power off time needs to be shortened in advance for users of the parallel operation system, which is inconvenient.
Based on this, the embodiment of the present application provides a parallel operation system upgrade method to improve the above problem.
Referring to fig. 3, a parallel computer system upgrade method according to an embodiment of the present application is provided, where the method includes:
and S10a, receiving the firmware upgrade file.
The firmware upgrading file is used for upgrading the firmware of the control unit.
In some embodiments, the firmware upgrade file is sent to the master control unit by the upper computer and then sent to each slave control unit by the master control unit, wherein the operation of receiving the firmware upgrade file can be executed by the master control unit in the parallel computer system.
The main control unit in the parallel machine system receives the firmware upgrading file, and can send an upgrading request to the upper computer at the main control unit, the upper computer sends the firmware upgrading file, and the main control unit receives the firmware upgrading file. Or the upper computer sends the firmware upgrading file to the main control unit at the first interval. The upper computer can also receive the upgraded firmware upgrade file and then send the upgrade file to the main control unit. In addition, the firmware upgrading file can also be sent to the main control unit by the upper computer after the main control unit sends an upgrading request to the upper computer at intervals of second time. Here, the present application does not specifically limit the transmission and reception of the firmware upgrade file.
In some other embodiments, after receiving the firmware upgrade file, the firmware upgrade file needs to be verified to determine whether to continue the subsequent operations, and with reference to fig. 4, a specific verification process includes:
s101d, verifying the firmware upgrade file based on the received fool-proof information.
The fool-proof information is used for verifying the firmware upgrading file, for example, the fool-proof information may be a verification code, the firmware upgrading file is verified through the verification code, and if the verification is passed, the firmware upgrading file is correct, or the received firmware upgrading file is used for upgrading the firmware of the parallel operation system, so that the upgrading safety is improved. Specifically, the check code as the fool-proof information may be used to check a data header of the firmware upgrade file, where the data header of the firmware upgrade file is a part of data of the firmware upgrade file, and if the check of the data header of the firmware upgrade file passes, it indicates that the firmware upgrade file is safe, and may be used to upgrade the parallel operation system.
The method for verifying the data header of the firmware upgrade file based on the check code is only an example of verifying the firmware upgrade file based on the received fool-proof information, and is not limited to the verification of the firmware upgrade file.
And S102d, judging whether to execute the operation of acquiring the battery pack successfully connected with the inversion unit or not based on the checking result. Specifically, if the verification is passed, step S20a is executed to obtain a battery pack successfully connected to the inverter unit; if the verification fails, step S103d is executed to return an error message of the firmware upgrade file, so as to adjust the firmware upgrade file in time.
In some other embodiments, after receiving the firmware upgrade file, it is necessary to determine whether the control unit in the current parallel operation system needs to be upgraded to determine whether to perform the subsequent upgrade operation, please refer to fig. 5, where the determining process includes:
s101e, acquiring the existing firmware version in the battery pack, and judging whether the firmware version of the firmware upgrade file is consistent with the existing firmware version, namely judging whether a control unit in the parallel system needs to be upgraded. Specifically, the firmware version existing in the battery pack is obtained first, and then whether the firmware version of the firmware upgrade file is consistent with the firmware version existing in the battery pack is judged. The firmware version is a firmware version already existing in the control unit of the battery pack, or the firmware version is a firmware upgrade file, and the firmware version may be 00001, 00002, or another form, for example.
And S102e, controlling the operation of obtaining the battery pack successfully connected with the inversion unit based on the judgment result. Specifically, please refer to fig. 6, if the difference is not consistent, step S20a is executed to obtain the battery pack successfully connected to the inverter unit; if the battery pack is consistent with the battery pack, the upgrading operation is finished, the firmware of the battery pack can not be upgraded, and the upgrading efficiency of the parallel operation system is improved.
In other embodiments, when the obtained existing firmware version of the battery pack is lower than the firmware version of the firmware upgrade file, step S20a is executed, otherwise, it indicates that the firmware upgrade is not required to be performed on the battery pack, and the upgrade operation is ended.
Since the firmware upgrade file stored in the upper computer is generally the firmware upgrade file of the latest version, when the firmware version of the firmware upgrade file is inconsistent with the acquired firmware version of the battery pack, it is often indicated that the firmware version of the battery pack is lower than the firmware version of the received firmware upgrade file, and step S20a may be executed.
And S20a, obtaining the battery pack successfully connected with the inverter unit. The inverter power circuit is connected with the inverter unit, the inverter power circuit is connected with the battery pack, the battery pack is connected with the inverter in the power circuit, and the corresponding battery pack can be charged and discharged. The battery pack which is not successfully connected with the inverter unit can be a battery pack which is not successfully connected with the power loop of the inverter, the battery pack is disconnected with the inverter, and the corresponding battery pack cannot be charged and discharged. The following is a detailed description of the method for upgrading the firmware of the battery pack, which has successfully accessed to the power loop of the inverter.
The parallel operation system acquires the battery packs which are successfully connected with the inverter unit, wherein the battery packs can be information transmitted to the main control unit through communication lines and then transmitted to the inverter by the main control unit. Or the main battery pack directly reports the condition that whether the main battery pack and the slave battery pack are successfully connected with the inversion unit to the inverter through the communication line.
In some other embodiments, before the step S20a is executed to obtain the battery pack successfully connected to the inverter unit, the battery pack not successfully connected to the inverter unit is first upgraded, please refer to fig. 7, and the upgrading process includes:
s201c, obtaining a battery pack which is not successfully connected with the inverter unit;
s202c, controlling the battery pack which is not successfully connected with the inverter unit, and upgrading the battery pack based on the firmware upgrading file. The battery pack which is not successfully connected with the inverter unit can be a battery pack which is not successfully connected with the inverter power loop. When firmware upgrading is performed on the battery packs which are not connected with the inverter power circuit, the battery packs are not connected with the inverter power circuit, so that the overpower problem of the parallel operation system does not need to be considered, the battery packs can be directly upgraded, after the upgrading is completed, the battery packs which are successfully connected with the inverter unit are upgraded, and the step S20a is entered.
In some other embodiments, the upgrading of the battery pack unsuccessfully connected to the inverter unit may be performed after the upgrading of the battery pack unsuccessfully connected to the inverter unit, that is, the battery pack successfully connected to the inverter unit is upgraded first, and then the battery pack unsuccessfully connected to the inverter unit is upgraded.
And S30a, confirming the battery pack in the preparation of upgrading and other battery packs for the battery packs successfully connected with the inverter unit, wherein the other battery packs can be battery packs except for the battery packs in the preparation of upgrading. When the battery pack is upgraded, a power loop of the inverter needs to be disconnected, the battery pack is in 'upgrading preparation', the control unit of the battery pack in the upgrading preparation is about to be upgraded according to the firmware upgrading file, and the operation executed on the battery pack in the upgrading preparation comprises the following steps: and electrically disconnecting the battery pack from the power loop of the inverter.
The master control unit and the slave control units both have unique addresses for identifying the control units, for example, six battery packs successfully connected with the inverter unit, the addresses of the control units corresponding to the six battery packs are '0', '1', '2', '3', '4' and '5', the control units of the battery packs are gradually upgraded, the battery pack with the address of '0' is a battery pack in preparation for upgrading before upgrading is started, and the addresses of the control units of other battery packs comprise '1', '2', '3', '4' and '5'. When the battery pack with the control unit address of "0" is upgraded, the battery pack is reconnected to the power loop of the inverter, then the battery pack with the control unit address of "1" is upgraded, the battery pack with the control unit address of "1" is used as the battery pack in the preparation for upgrading, and at this time, the control unit addresses of other battery packs include "0", "2", "3", "4" and "5".
Referring to fig. 8, the specific confirmation process includes:
and S30b, controlling and confirming the operation of the battery pack in the upgrading preparation and other battery packs except the battery pack in the upgrading preparation based on whether the parallel operation system is in the standing state.
S301b, obtaining the current of the parallel operation system, and judging whether the absolute value of the current is smaller than a first value. The current of the parallel operation system is the total current of the parallel operation system, namely the total current of each battery pack, namely the bus current of the inverter.
The method for judging whether the parallel operation system is in the standing state is to judge whether the absolute value of the bus current of the inverter is smaller than a first value, wherein the first value is a basis for judging whether the parallel operation system is in the standing state. In some embodiments, the first value may take on the value of 1 ampere.
In one embodiment of the present application, the current flowing through the bus bar may be a positive value, such as 5A, when the battery pack is in a charging state, and the current flowing through the bus bar may be a negative value, such as-5A, when the battery pack is in a discharging state. And when the bus current of the inverter is more than-1A and less than 1A, the parallel operation system can be considered to be in a static state.
If the parallel operation system is in the standing state, executing step S30a to confirm the battery pack in the preparation for upgrading and other battery packs except the battery pack in the preparation for upgrading; and if the parallel operation system is not in the standing state, ending the upgrading process.
And S40a, adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs. Wherein the power parameters include a maximum amplification current and a maximum charging current. When N slave battery packs are connected into the power loop, the parallel operation system can calculate the maximum allowable charging and discharging current: the maximum allowable charging current of the system is Imaxc-Ic N, the maximum allowable discharging current of the system is Imaxd-Id N, Ic is the maximum allowable charging current of a single battery pack, and Id is the maximum allowable discharging current of the single battery pack.
The power loop of the inverter can be disconnected when the battery pack is upgraded, the power loop of the inverter can be accessed again after the upgrade is completed, if the power parameters of the parallel operation system are not adjusted, the current for charging and discharging the battery pack can be distributed to other battery packs after the upgraded battery pack is disconnected from the power loop, the current of other battery packs can be increased, and the risk of overpower exists. Therefore, when the parallel operation system needs to be upgraded, the maximum charging and discharging current allowed by the system, namely the power parameter of the parallel operation system, needs to be adjusted, then the main control unit of the main battery pack can send the upgrading state of each battery pack and the power parameter of the parallel operation system to the inverter through the communication line, the inverter can adjust the power output of the inverter according to the power parameter of the parallel operation system, and the risk that other battery packs are over-powered due to the fact that the inverter outputs over-power is reduced.
Specifically, a first minimum value of the maximum discharge current of each battery pack in the other battery packs is obtained, and the number of the other battery packs is multiplied by the first minimum value to obtain the maximum discharge current allowed by the parallel operation system;
and/or the presence of a gas in the gas,
and acquiring a second minimum value of the maximum charging current of each battery pack in the other battery packs, and multiplying the number of the other battery packs by the second minimum value to obtain the maximum charging current allowed by the parallel operation system.
When the maximum discharge current of each battery pack is the same, the first minimum value is the same as the maximum discharge current of any one of the battery packs.
When the maximum discharge currents of the battery packs are different, the minimum value of the maximum discharge currents of other battery packs is the first minimum value.
And multiplying the number of other battery packs by the first minimum value to obtain the maximum discharge current allowed by the parallel operation system.
Because a plurality of battery packs in the parallel system are in parallel connection, and the voltages of the battery packs are basically consistent, after the first minimum value is obtained, the maximum discharge power allowed by the parallel system can be obtained by multiplying the voltage of any battery pack.
Similarly, when the maximum charging current of each battery pack is the same, the second minimum value is the same as the maximum charging current of any one of the battery packs.
When the maximum charging currents of the battery packs are different, the second minimum value is the minimum value in the maximum charging currents of other battery packs.
And multiplying the number of other battery packs by the second minimum value to obtain the maximum charging current allowed by the parallel operation system.
Because a plurality of battery packs in the parallel system are in parallel connection, and the voltages of the battery packs are basically consistent, after the second minimum value is obtained, the maximum charging power allowed by the parallel system can be obtained by multiplying the voltage of any battery pack.
Specifically, the maximum allowable charging current of the system is adjusted to Imaxc ═ Ic (N-1), the maximum allowable discharging current of the system is adjusted to Imaxd ═ Id (N-1), Ic is the second minimum value, and Id is the first minimum value. When the battery pack accessed to the power loop of the inverter is gradually upgraded, the battery pack in the upgrading preparation and other battery packs except the battery pack in the upgrading preparation are confirmed, the power parameter of the parallel operation system is adjusted according to the power parameter of each battery pack in the other battery packs, the battery pack in the upgrading preparation is controlled to be upgraded based on the firmware upgrading file, and the battery pack can be gradually upgraded. When a certain battery pack is upgraded, other battery packs are not required to be powered off, the parallel operation system can still be accessed, and the power parameter of the parallel operation system is adjusted according to other battery packs, so that the risk of overpower of the parallel operation system can be reduced, and the safety of the parallel operation system in firmware upgrading is improved. It can be understood that, when the power parameter of the parallel operation system is adjusted, calculation can be performed once when each battery pack is upgraded, and it is ensured that the power output of the inverter is always matched with the maximum charging and discharging current allowed by the parallel operation system in the upgrading process. In other embodiments, if a battery pack is upgraded each time and the voltage and the internal resistance of each battery pack are approximately one, the power parameter of the parallel operation system can be adjusted only once before the system is upgraded, and the adjusted value can be applied to the upgrading process of all the battery packs successfully connected with the inverter unit, so that the upgrading efficiency is further improved.
And S50a, controlling the battery pack in the upgrading preparation to be upgraded based on the firmware upgrading file. Referring to fig. 9, step S50a specifically includes:
s501a, acquiring the identifier of the battery pack, wherein the identifier of the battery pack comprises the address of the control unit of the battery pack;
and S502a, according to the identification of the battery pack, gradually upgrading the battery pack successfully connected with the inverter unit.
The identification of the battery pack is used to distinguish each battery pack, for example, the address of the control unit of each battery pack may be used to identify the battery pack, and both the master control unit and the slave control unit have a unique control unit address. For example, in some embodiments, the control unit address of the master battery pack is "0", the control unit address of the slave battery pack directly connected to the master battery pack is "1", the control unit address of the slave battery pack connected to the slave battery pack is "2", and the addresses of the control units of the subsequent slave battery packs sequentially go to nth. If N is 9, if the slave battery packs with the control unit addresses of "1", "2", "5", "8" and "9" are battery packs successfully connected with the inverter unit in the upgrade task, the battery packs which are not successfully connected with the inverter unit, that is, the slave battery packs with the control unit addresses of "3", "4", "6" and "7", are upgraded first, then the slave battery packs with the control unit addresses of "1", "2", "5", "8" and "9" are upgraded in sequence, and after all the slave battery packs are upgraded, the master battery pack with the control unit address of "0" is upgraded finally. By gradually upgrading the acquired battery pack according to the sequence of the addresses, the condition that the battery pack is not upgraded or upgraded for many times can be effectively reduced.
In some other embodiments, the upgrading process of the battery packs is not limited to gradual upgrading, and may also be batch-by-batch upgrading, for example, two of the battery packs may be upgraded at the same time, and then the other two battery packs may be upgraded at the same time until the upgrading of all the battery packs is completed. In addition, a plurality of battery packs can be upgraded at the same time, and then the other plurality of battery packs can be upgraded at the same time until the upgrading of all the battery packs is completed.
In some other embodiments, the method for parallel system upgrade further comprises:
and S60a, when the upgrading of a certain battery pack in the upgrading preparation is completed, accessing the upgraded battery pack into the power loop of the inverter unit. The battery pack incorporates it into the inverter in time after the upgrade is completed, via step S60 a.
The above steps S10a, S20a, S30a, S40a, S50a and S60a do not limit the order of upgrading the parallel machine system in the present application, and the order of exchanging the front and back order of any reasonable steps among the steps S10a, S20a, S30a, S40a, S50a and S60a is within the scope of the present application.
In the embodiment of the application, the battery pack which is successfully connected with the inverter unit is obtained by receiving the firmware upgrade file, the battery pack which is successfully connected with the inverter unit is confirmed, the power parameters of the parallel operation system are adjusted according to the power parameters of the battery packs in other battery packs, the battery pack which is in the upgrade preparation is controlled to be upgraded based on the firmware upgrade file, and the battery pack can be upgraded. The power parameter of the parallel operation system can be a maximum charge-discharge power (SOP) value allowed by the parallel operation system, and comprises a maximum discharge power and a maximum charge power; the power parameter of the inverter may be a maximum charging and discharging power SOP value that can be provided when the inverter charges and discharges the parallel operation system, including a maximum discharging power and a maximum charging power. The power parameters of the parallel operation system are adjusted according to the power parameters of the battery packs in other battery packs, so that the battery packs can be upgraded successively, the other battery packs which are not upgraded can still be accessed to the parallel operation system without power failure, and the power parameters of the inverter are synchronously adjusted according to the power parameters of the parallel operation system, so that the input and output power of the inverter cannot exceed the power range allowed by the parallel operation system, the risk of overpower of the parallel operation system is reduced, and the safety of the parallel operation system during firmware upgrade is improved.
In addition, in the whole process of upgrading the parallel operation system, the main control unit in the main battery pack is in communication connection with the inverter through the communication line, and the situation that the system works is influenced due to abnormal communication can be avoided. After the parallel operation system is upgraded, the adjusted power parameter in the upgrading process can be adjusted back to the value under the normal use condition.
Referring to fig. 10, fig. 10 is a schematic diagram of a parallel computer system upgrade apparatus 200 according to an embodiment of the present disclosure, and the parallel computer system upgrade apparatus includes a receiving module 201, a first confirming module 202, an upgrade module 203, a second confirming module 204, and an adjusting module 205. The receiving module 201 is configured to receive a firmware upgrade file. The first confirmation module 202 is used for confirming the battery pack successfully connected with the inverter unit. The upgrading module 203 is used for upgrading the battery pack successfully connected with the inverter unit based on the firmware upgrading file. The second confirmation module 204 is configured to confirm the battery packs except for the battery packs in preparation for upgrading for the battery packs successfully connected to the inverter unit. The adjusting module 205 is configured to adjust a power parameter of the parallel operation system according to the power parameter of each of the other battery packs. In some other embodiments, the adjusting module 205 is further configured to connect the upgraded battery pack to a power circuit of the inverter unit.
In the embodiment of the present application, the firmware upgrade file is received by the receiving module 201; the battery pack successfully connected with the inverter unit is confirmed through a first confirmation module 202; for the battery pack successfully connected with the inverter unit, the second confirmation module 204 confirms other battery packs except for the battery pack in the upgrade preparation; adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs through an adjusting module 205; the upgrading module 203 controls the battery pack successfully connected with the inverter unit to be upgraded based on the firmware upgrading file. By the device, the battery packs can be upgraded one by one, the power parameters of the parallel operation system are adjusted according to the power parameters of the battery packs in other battery packs, so that the battery packs can be upgraded one by one, other battery packs in non-upgrading can still be accessed without power failure, and the risk of overpower of the parallel operation system is reduced and the safety of firmware upgrading of the parallel operation system is improved due to the fact that the power parameters of the parallel operation system are adjusted according to other battery packs in non-upgrading.
Referring to fig. 11, fig. 11 is a schematic diagram of a hardware structure of a control unit capable of executing a parallel operation system upgrade method according to an embodiment of the present application. The control unit may be the above-described main control unit. The control unit includes: one or more processors and a memory, one for example in fig. 11.
The processor and the memory may be connected by a bus or other means, and the bus connection is taken as an example in the embodiment of the present application.
The memory, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules (e.g., the respective modules shown in fig. 10) corresponding to the parallel computer system upgrade method in the embodiment of the present application. The processor executes various functional applications and data processing of the apparatus of the parallel computer system upgrading method by running the nonvolatile software program, instructions and modules stored in the memory, that is, the parallel computer system upgrading method of the above method embodiment is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the apparatus of the parallel system upgrade method, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory optionally includes memory remotely located from the processor, and these remote memories may be connected to the parallel system upgrade method apparatus over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory and, when executed by the one or more processors, perform the parallel operation system upgrade method in any of the method embodiments described above.
The product can execute the parallel operation system upgrading method provided by the embodiment of the application, and has corresponding functional modules and beneficial effects of the execution method. For details of the technology that are not described in detail in this embodiment, reference may be made to the parallel operation system upgrading method provided in this embodiment.
The embodiment of the application provides a nonvolatile computer readable storage medium, and the nonvolatile computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed by a parallel computer system to execute the parallel computer system upgrading method in any method embodiment.
Embodiments of the present application provide a computer program product comprising a computer program stored on a non-volatile computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the parallel computer system upgrade method in any of the above-described method embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, and the program can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. A method for upgrading a parallel operation system including a plurality of battery packs electrically connected to an inverter unit, the method comprising:
receiving a firmware upgrade file;
confirming the battery pack successfully connected with the inversion unit;
the battery pack successfully connected with the inversion unit is upgraded based on the firmware upgrading file;
for the battery pack successfully connected with the inverter unit, confirming other battery packs except for upgrading preparation;
and adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs.
2. The upgrade method according to claim 1, wherein the power parameters of the battery pack include a maximum amplification current and a maximum charging current;
the adjusting the power parameter of the parallel operation system according to the power parameter of each battery pack in the other battery packs further comprises:
acquiring a first minimum value of the maximum discharge current of each battery pack in the other battery packs, and multiplying the number of the other battery packs by the first minimum value to obtain the maximum discharge current allowed by the parallel operation system;
and/or the presence of a gas in the gas,
and acquiring a second minimum value of the maximum charging current of each battery pack in the other battery packs, and multiplying the number of the other battery packs by the second minimum value to obtain the maximum charging current allowed by the parallel operation system.
3. The upgrading method according to claim 1, wherein the battery pack successfully connected with the inverter unit is upgraded based on the firmware upgrading file, and further comprising:
acquiring an identifier of the battery pack, wherein the identifier of the battery pack comprises an address of a control unit of the battery pack;
and according to the identification of the battery pack, gradually upgrading the battery pack successfully connected with the inversion unit.
4. The method according to any one of claims 1-3, further comprising:
and when the upgrading of a certain battery pack in the upgrading preparation is finished, accessing the battery pack into a power loop of the inverter unit.
5. The method according to any one of claims 1 to 3, wherein before the battery pack successfully connected with the inverter unit is upgraded based on the firmware upgrade file, the method further comprises:
and controlling the upgrading operation of the battery pack successfully connected with the inverter unit based on whether the parallel operation system processes the standing state.
6. The method according to claim 5, wherein before the controlling the upgrade operation of the battery pack successfully connected with the inverter unit based on whether the parallel operation system is in a static state, the method further comprises:
obtaining the current of the parallel operation system, and judging whether the absolute value of the current is smaller than a first value or not;
if so, the parallel operation system is in a standing state;
if not, the parallel operation system is not in a standing state.
7. The method according to any one of claims 1-3, further comprising:
obtaining a battery pack which is not successfully connected with the inverter unit;
and controlling the battery pack which is not successfully connected with the inverter unit to be upgraded based on the firmware upgrading file.
8. The method of claim 1, further comprising:
based on the received fool-proof information, verifying the firmware upgrading file;
and controlling the operation of obtaining the battery pack successfully connected with the inverter unit based on the checking result.
9. The method of claim 1, wherein prior to obtaining a battery pack successfully connected to the inverter unit, the method further comprises:
acquiring the existing firmware version in the battery pack, and judging whether the firmware version of the firmware upgrade file is consistent with the existing firmware version;
and controlling the operation of obtaining the battery pack successfully connected with the inversion unit based on the judgment result.
10. An upgrade apparatus of a parallel operation system including a plurality of battery packs electrically connected to an inverter unit, the apparatus comprising:
the receiving module is used for receiving the firmware upgrading file;
the first confirmation module is used for confirming the battery pack which is successfully connected with the inversion unit;
the upgrading module is used for upgrading the battery pack successfully connected with the inversion unit based on the firmware upgrading file;
the second confirmation module is used for confirming other battery packs except for the battery pack in the upgrading preparation for the battery pack which is successfully connected with the inverter unit;
and the adjusting module is used for adjusting the power parameters of the parallel operation system according to the power parameters of each battery pack in the other battery packs.
11. A parallel operation system, comprising:
an inversion unit;
the battery packs comprise control units and battery modules, and the control units are electrically connected with the battery modules and the inversion units respectively;
the control unit is adapted to perform the method of any of claims 1-9.
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| CN202111406657.4A CN114201194A (en) | 2021-11-24 | 2021-11-24 | Parallel operation system upgrading method and device and parallel operation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116909608A (en) * | 2023-09-12 | 2023-10-20 | 深圳市首航新能源股份有限公司 | Function updating method and device for battery product, battery product and energy storage system |
| CN117908935A (en) * | 2024-03-19 | 2024-04-19 | 绿进新能源科技(常熟)有限公司 | Battery pack orientation OTA method, device and storage medium based on ID |
| CN117908935B (en) * | 2024-03-19 | 2024-05-24 | 绿进新能源科技(常熟)有限公司 | Battery pack orientation OTA method, device and storage medium based on ID |
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2021
- 2021-11-24 CN CN202111406657.4A patent/CN114201194A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116909608A (en) * | 2023-09-12 | 2023-10-20 | 深圳市首航新能源股份有限公司 | Function updating method and device for battery product, battery product and energy storage system |
| CN117908935A (en) * | 2024-03-19 | 2024-04-19 | 绿进新能源科技(常熟)有限公司 | Battery pack orientation OTA method, device and storage medium based on ID |
| CN117908935B (en) * | 2024-03-19 | 2024-05-24 | 绿进新能源科技(常熟)有限公司 | Battery pack orientation OTA method, device and storage medium based on ID |
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