Power battery system calibration method and device, network communication equipment and storage medium

Abstract

The invention relates to a power battery system calibration method and device, network communication equipment and a storage medium. The method comprises the following steps: receiving a first calibration instruction which is sent by an energy management system in an energy storage system by adopting a first communication protocol and aims at a power battery system in the energy storage system, wherein the power battery system in the energy storage system is an echelon utilization power battery system; a second communication protocol adopted by the power battery system is determined, the first calibration instruction is converted into a second calibration instruction conforming to the second communication protocol, and the first communication protocol is different from the second communication protocol; and sending the second calibration instruction to a battery management system in the power battery system, so that the battery management system performs parameter calibration on the power battery system according to the second calibration instruction. By adopting the method, the parameter calibration efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of power battery system calibration, and in particular to a power battery system calibration method, device, network communication equipment and storage medium. Background Art

[0002] With the rapid development of the new energy vehicle industry, the number of retired power battery systems, i.e. battery packs, is increasing year by year. These power battery systems can be recycled through cascade utilization.

[0003] In the process of cascade utilization of heterogeneous battery packs, in order to ensure safety, the power battery pack needs to be calibrated. However, since the current parameter annotation method requires the battery pack to be disassembled, the parameter calibration efficiency is low. Summary of the invention

[0004] Based on this, it is necessary to provide a power battery system calibration method, device, network communication equipment and storage medium that can improve parameter calibration efficiency in response to the above technical problems.

[0005] On the one hand, the present application provides a power battery system calibration method, which is executed by a network communication device in an energy storage system, wherein the network communication device is used for the power battery system to communicate with an energy management system, and the energy storage system includes multiple power battery systems of different communication types, including: receiving a first calibration instruction for a power battery system in the energy storage system sent by the energy management system in the energy storage system using a first communication protocol, wherein the power battery system in the energy storage system is a power battery system for cascade utilization; determining a second communication protocol used by the power battery system, converting the first calibration instruction into a second calibration instruction that complies with the second communication protocol, wherein the first communication protocol is different from the second communication protocol; and sending the second calibration instruction to the battery management system in the power battery system, so that the battery management system performs parameter calibrating on the power battery system according to the second calibration instruction.

[0006] On the other hand, the present application also provides a power battery system calibration device, which belongs to a network communication device in an energy storage system, and includes: a calibration instruction receiving module, used to receive a first calibration instruction for a power battery system in the energy storage system, which is sent by an energy management system in the energy storage system using a first communication protocol, and the power battery system in the energy storage system is a power battery system for cascade utilization; the network communication device is used for the power battery system to communicate with the energy management system, and the energy storage system includes multiple power battery systems of different communication types; an instruction conversion module, used to determine a second communication protocol adopted by the power battery system, and convert the first calibration instruction into a second calibration instruction that complies with the second communication protocol, and the first communication protocol is different from the second communication protocol; a parameter calibration module, used to send the second calibration instruction to the battery management system in the power battery system, so that the battery management system performs parameter calibration on the power battery system according to the second calibration instruction.

[0007] On the other hand, the present application also provides a network communication device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps in the above-mentioned power battery system calibration method when executing the computer program.

[0008] On the other hand, the present application also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the above-mentioned power battery system calibration method are implemented.

[0009] On the other hand, the present application also provides a computer program product, including a computer program, which implements the steps in the above-mentioned power battery system calibration method when executed by a processor.

[0010] The power battery system calibration method, device, network communication device, computer-readable storage medium and computer program product, the network communication device is used for the power battery system to communicate with the energy management system, the energy storage system includes multiple power battery systems of different communication types, receives a first calibration instruction for the power battery system in the energy storage system sent by the energy management system of the energy storage system using a first communication protocol, the power battery system in the energy storage system is a cascade-utilized power battery system, determines the second communication protocol used by the power battery system, converts the first calibration instruction into a second calibration instruction that complies with the second communication protocol, the first communication protocol is different from the second communication protocol, sends the second calibration instruction to the power battery system, so that the power battery system calibrates the power battery system according to the second calibration instruction, thereby applying the cascade-utilized power battery systems of different communication types to the same energy storage system through the network device, and in the calibration process, the battery management system in the power battery system can be used for communication without the need to disassemble the power battery system separately, thereby improving the parameter calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0012] FIG1 is a diagram of an application environment of a power battery system calibration method in some embodiments;

[0013] FIG2 is a schematic diagram of a flow chart of a power battery system calibration method in some embodiments;

[0014] FIG3 is a schematic diagram of a process of a network communication device actively sending instructions in some embodiments;

[0015] FIG4 is a schematic flow chart of a power battery system calibration method in some other embodiments;

[0016] FIG5 is a structural block diagram of a power battery system calibration device in some embodiments;

[0017] FIG. 6 is a diagram of the internal structure of a network communication device in some embodiments. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] The power battery system calibration method provided in the embodiment of the present application can be applied to calibrate the battery pack in the energy storage system. As shown in Figure 1, a system architecture diagram of the energy storage system is shown, and the energy storage system includes multiple power battery systems of different types, for example, a type A power battery system, a type B power battery system, and an N-type power battery system. Multiple means at least two, and the power battery system can also be called a battery pack. The power battery system can be a CTP (Cell to Pack) vehicle battery. The solid line in Figure 1 represents the DC power connection, and the dotted line represents the signal connection.

[0020] Each power battery system includes its own battery management system (BMS). The battery management system BMS is used to monitor and manage the working conditions of the battery, such as charge and discharge status, temperature, voltage, current, etc. Each power battery system corresponds to a power conversion system (PCS), and each power battery system, i.e., battery pack, can communicate with the corresponding energy storage converter. Different power battery systems can correspond to different energy storage converters, or multiple power battery systems can correspond to the same energy storage converter.

[0021] The energy storage system also includes an energy management system (EMS). The energy management system EMS can collect information about the power battery system, i.e. the battery pack, in real time, including but not limited to the charging and discharging status, power, voltage, current and other information of the power battery system, and can process and analyze the data of the mobile phone, and manage the power battery system according to the analysis results, such as adjusting the charging and discharging strategy, optimizing energy distribution, etc., to achieve efficient use and conservation of energy.

[0022] The energy management system can send control instructions to the energy storage converter PCS, and the energy storage converter PCS charges or discharges the power battery system according to the control instructions.

[0023] Since the communication protocols between the battery management system BMS and the energy management system EMS may be incompatible, that is, different communication protocols are used, there may be no direct communication between the battery management system BMS and the energy management system EMS. In order to solve this problem, in the energy storage system, a network communication device is set between the power battery system and the energy storage management system, and the power battery system and the energy storage management system communicate through the network communication device. At least one network communication device can be set in the energy storage system, and different power battery systems can use different network communication devices to communicate with the energy storage management system, or multiple power battery systems can use the same network communication device to communicate with the energy storage management system respectively. For example, different types of power battery systems in the energy storage system can use the same network communication device to communicate with the energy storage management system respectively, so the network communication device can also be called a heterogeneous conversion controller, and heterogeneity refers to different types of power battery systems. In Figure 1, the A-type power battery system communicates with the energy management system EMS through the heterogeneous conversion controller A, the B-type power battery system communicates with the energy management system EMS through the heterogeneous conversion controller B, and the N-type power battery system communicates with the energy management system EMS through the heterogeneous conversion controller N. The heterogeneous conversion controller A, the heterogeneous conversion controller B, and the heterogeneous conversion controller N may be different heterogeneous conversion controllers or the same heterogeneous conversion controller.

[0024] The network communication device can convert the communication data from the energy management system EMS into a format that can be recognized by the battery management system BMS, and send it to the battery management system BMS. The network communication device can also convert the response data from the battery management system BMS into a format that can be recognized by the energy management system EMS, and send it to the energy management system EMS.

[0025] In Figure 1, the solid line represents the DC power connection, the dotted line represents the signal transmission, and the "○" on the dotted line represents the communication node, which is referred to as a node. The node can be understood as the direction of signal transmission. For example, the aA node represents the signal transmission direction from the heterogeneous conversion controller A to the A-type power battery system, the bA node represents the signal transmission direction from the energy management system EMS to the heterogeneous conversion controller A, and the c node represents the signal transmission direction from the network outside the energy storage system to the energy management system EMS. In some embodiments, as shown in Figure 2, a power battery system calibration method is provided, which is illustrated by taking the method applied to a network communication device in an energy storage system as an example, and includes the following steps 202 to 206. Among them:

[0026] Step 202 , receiving a first calibration instruction for a power battery system in the energy storage system, which is sent by an energy management system in the energy storage system using a first communication protocol. The power battery system in the energy storage system is a power battery system for cascade utilization.

[0027] Among them, the power battery system is the battery pack. The power battery system is a retired power battery system. Compared with the new power battery system, the retired power battery system has a decline in performance and capacity. The cascade utilization of the power battery system is an important concept of environmental protection and resource recycling. It refers to the process of necessary treatment of waste or retired power battery systems so that they can continue to play a role in other fields.

[0028] The energy storage system includes multiple power battery systems with different communication types. Different communication types refer to different communication protocols. Power battery systems with different communication protocols are usually heterogeneous. Heterogeneity includes but is not limited to different vehicles, different manufacturers, different aging levels, different capacities, different lifespans, and different types. Therefore, the power battery system in the energy storage system is a heterogeneous cascade utilization power battery system. Heterogeneous cascade utilization refers to the process of screening, reorganizing and reusing retired power batteries from different vehicles, different manufacturers, different aging levels, and different types. That is, heterogeneous battery pack cascade utilization refers to the process of collecting, testing, classifying, reorganizing, and reusing retired power battery packs from different models, different models, different life states, or different capacities.

[0029] The first calibration instruction may be triggered during the debugging phase of the energy storage system, or may be triggered during the problem solving phase.

[0030] Specifically, the first calibration instruction may carry calibration parameters, which may be determined by the energy management system or the network communication device. For example, the energy management system may obtain relevant information of the power battery system and the electrical performance indicators of the energy storage system, and determine the calibration parameters applicable to the power battery system in the energy storage system based on the relevant information of the power battery system and the electrical performance indicators of the energy storage system. The calibration parameters include but are not limited to voltage, temperature, SOC (State of Charge), SOH (State of Health), fault alarm threshold, charge and discharge threshold, communication address, etc.

[0031] Among them, the relevant information of the power battery system includes but is not limited to historical usage data, electrical performance indicators, current performance data after sorting, and battery cell technical parameters. Historical usage data includes but is not limited to total discharge and fault record information. Fault record information is information that records faults such as excessive pressure difference, excessive temperature, relay adhesion, and battery failure to power on. The electrical performance indicators of the power battery system include but are not limited to static pressure difference, static temperature difference, dynamic pressure difference, and open circuit voltage of the entire package. Battery cell technical parameters include but are not limited to battery cell categories, voltage usage range, etc. The electrical performance indicators of the energy storage system include but are not limited to the design capacity of the energy storage system, charging and discharging power, etc.

[0032] In some embodiments, the first calibration instruction may be actively sent by the energy management system. For example, in FIG1 , the energy management system may send the first calibration instruction to the heterogeneous conversion controller A. Alternatively, when the energy management system receives a calibration request for the power battery system sent by other devices other than the energy storage system, the energy management system responds to the calibration request and sends the first calibration instruction to the network communication device corresponding to the power battery system.

[0033] Step 204 , determining a second communication protocol used by the power battery system, and converting the first calibration instruction into a second calibration instruction that complies with the second communication protocol, wherein the first communication protocol is different from the second communication protocol.

[0034] Specifically, the network communication device can realize the conversion between different communication protocols, so that when the communication protocols between the EMS and the BMS in the power battery system are incompatible, the EMS and the BMS can communicate by converting the communication protocols.

[0035] Step 206 , sending a second calibration instruction to the battery management system in the power battery system, so that the battery management system calibrates parameters of the power battery system according to the second calibration instruction.

[0036] Among them, parameter calibration can be to adjust the parameters of the power battery system, for example, the capacity, voltage, current, temperature, and health status can be calibrated. Of course, calibration can also include collecting the parameter values ​​of the power battery system. Calibration can improve the safety of the energy storage system.

[0037] In some embodiments, the network communication device can receive data specified in the communication protocol corresponding to each CAN (Controller Area Network) channel of the BMS in the power battery system, reorganize the received data according to the protocol conversion strategy, and forward the reorganized data to the upper-layer control end according to the content specified in the communication protocol of the upper-layer control end. The upper-layer control end is, for example, EMS, PCS, etc.

[0038] In some embodiments, the network communication device can simulate the original vehicle communication node function and provide the external signal conditions required by the BMS to support the BMS to complete the "power on and off process", "charge and discharge control", "relay emergency control" and other basic functions of the BMS. The original vehicle refers to the vehicle from which the power battery system comes.

[0039] In some embodiments, the network communication device has the function of fault detection and local protection of the power battery system. For example, it can report fault information such as single cell voltage, module temperature, total voltage, and BMS to ensure safe operation of the system.

[0040] In some embodiments, the network communication device can obtain the CAN message data reported by the BMS in the power battery system, set the local protection threshold according to the reported CAN message data, and perform protection actions on the power battery system. The protection action is, for example, to cut off the relay and report the status to the upper control terminal. The local protection threshold can be configured according to the demand input.

[0041] In some embodiments, the network communication device receives a software upgrade instruction sent through a debugging interface or a CAN network, and upgrades the software in the network communication device according to the software upgrade instruction. When the upgrade fails, the software before the upgrade, i.e., the application program, is restored. In the development stage, the software upgrade instruction may be sent through a debugging interface or a CAN network, and in the application stage, the software upgrade instruction may be sent through a CAN network.

[0042] In the above power battery system calibration method, the network communication device is used for the power battery system to communicate with the energy management system, the energy storage system includes multiple power battery systems of different communication types, the energy management system of the energy storage system receives a first calibration instruction for the power battery system in the energy storage system sent by the energy management system of the energy storage system using the first communication protocol, the power battery system in the energy storage system is a power battery system of cascade utilization, the second communication protocol used by the power battery system is determined, the first calibration instruction is converted into a second calibration instruction that complies with the second communication protocol, the first communication protocol is different from the second communication protocol, and the second calibration instruction is sent to the power battery system so that the power battery system calibrates the power battery system according to the second calibration instruction, thereby applying the cascade utilization power battery systems of different communication types to the same energy storage system through the network device, and in the process of calibration, the battery management system in the power battery system can be used for communication without disassembling the power battery system separately, thereby improving the parameter calibration efficiency. In addition, the parameter calibration can be made more comprehensive, and the safety of the energy storage system can be improved.

[0043] The power battery system calibration method provided in this application, through the cascade utilization and compatibility technology of heterogeneous battery packs, can realize that power battery systems with different structural forms and different voltage platform levels can be directly connected to the energy storage system without hardware modification to achieve cascade utilization. Therefore, the energy storage system can utilize the power battery system, i.e., the battery pack, that is, the power battery system for testing or retirement as a whole package, and can achieve the mixed use of power battery systems of different types, capacities, and health levels through network communication equipment. The problem that the power battery system for CTP vehicles is difficult to be recycled is solved. It helps to solve the problem that the calibration work of power battery systems with different life states, different models, and different capacities is relatively cumbersome and inaccurate, and especially helps to solve the problem that there will be certain deviations between the replaced module and the original system module single cell voltage, total pressure, SOC and other data.

[0044] In some embodiments, as shown in FIG. 3 , the method further includes: step 302 , generating a third calibration instruction for the power battery system that complies with the second communication protocol; step 304 , sending the third calibration instruction to the power battery system so that the power battery system calibrates the power battery system according to the third calibration instruction.

[0045] Specifically, the network communication device may actively send a third calibration instruction to the power battery system to instruct the power battery system to be calibrated.

[0046] In this embodiment, the network communication device has the function of actively calibrating the power battery system, thereby improving the flexibility of calibration.

[0047] In some embodiments, the third calibration instruction carries calibration parameters applicable to the power battery system in the energy storage system. Before generating the third calibration instruction that complies with the second communication protocol, it also includes: obtaining relevant information of the power battery system and electrical performance indicators of the energy storage system; determining the calibration parameters applicable to the power battery system in the energy storage system based on the relevant information of the power battery system and the electrical performance indicators of the energy storage system.

[0048] Specifically, the network communication device can perform a comprehensive analysis based on the relevant information of the power battery system and the electrical performance indicators of the energy storage system to obtain calibration parameters applicable to the power battery system in the energy storage system.

[0049] In this embodiment, the calibration parameters can be analyzed and obtained through the network communication device, and a third calibration instruction can be sent, so that the network communication device has the function of actively calibrating the power battery system, thereby improving the flexibility of calibration.

[0050] In some embodiments, the first calibration instruction is triggered by the energy management system in response to a received calibration request for the power battery system.

[0051] Specifically, the energy management system can support wireless communication and communication with external networks outside the energy storage system, so as to support remote calibration of the power battery system. The calibration request can be sent by the device in the external network to the energy management system. The network communication device can also support wireless communication.

[0052] In some embodiments, as shown in FIG. 4 , a flowchart for calibrating a power battery system is provided, including: first, collecting data, including: collecting sorted performance data of the power battery system, collecting cell technical parameters, collecting historical usage data of the power battery system, collecting electrical performance indicators of the power battery system, and collecting electrical performance indicators of the energy storage system; second, comprehensively calculating the collected data to obtain calibration parameters applicable to the power battery system in the energy storage system; then, performing calibration, including: calibrating the BMS at node a, or calibrating the heterogeneous converter at node b, or calibrating the remote interface or local interface of the EMS at node c, or sending instructions through the heterogeneous converter at node b, and the heterogeneous converter calibrates the BMS at node a, or sending instructions through the remote interface or local interface of the EMS at node c, and the EMS calibrates the heterogeneous controller at node b, or sending instructions through the remote interface or local interface of the EMS at node c, and the EMS sends instructions to the heterogeneous controller again at node b, and finally the heterogeneous controller calibrates the BMS at node c.

[0053] In this embodiment, the energy management system may trigger a first calibration instruction in response to a received calibration request for the power battery system, thereby realizing remote parameter calibration.

[0054] The power battery system calibration method provided in the present application can realize information interaction between the energy management system EMS and battery management systems BMS of various communication types through the heterogeneous conversion controller as the network communication hub unit, and realize conversion of different communication protocols between controllers through signal routing, address management and network monitoring of data, thereby expanding the application environment of the battery management system EMS and achieving the compatibility goal of the EMS system. At the same time, this system architecture can be used to calibrate heterogeneous cascade utilization power battery systems according to different nodes, and can effectively adopt customized calibration solutions for cascade utilization battery systems of different models and different states; and use any communication node to calibrate the system.

[0055] In some embodiments, the method further includes: when it is determined that the power battery system has a fault, sending a relay cut-off signal to the power battery system to instruct to cut off the relay in the power battery system, and sending relevant status information corresponding to the fault to the energy management system.

[0056] Specifically, the network communication device has the function of sending the status information of the network communication device. The network communication device can also provide local protection functions for the power battery system. For example, the network communication device can send CAN control messages or hard-line control information to the BMS in the power battery system according to the set fault protection strategy to request the BMS to cut off the relay. The control methods of different power battery systems may be different. In addition, the network communication device can also send relevant status information to the upper-level control end. The relevant status information includes but is not limited to the reason for active switching, cut-off request node information, fault site data, etc. The upper-level control end receives the relevant status information and performs corresponding processing according to the relevant status information.

[0057] In some embodiments, the network communication device can receive CAN communication data sent by the upper control terminal. When the network communication device receives a CAN communication instruction sent by the upper control terminal to instruct to control the relay, the network communication device sends a relay control instruction to the BMS, such as an instruction to cut off the relay. The network communication device can also receive other status information sent by the upper control terminal, including but not limited to DCDC (direct current-to-direct current voltage converter) current, voltage, working status, etc.

[0058] In this embodiment, when a fault occurs in the power battery system, the network communication device instructs to cut off the relay in the power battery system and feeds back relevant status information related to the fault to the energy management system, thereby improving the safety of the power battery system and improving the efficiency of fault handling.

[0059] In some embodiments, the method further includes: when the duration between the last time data was received from the power battery system and the current time reaches a duration threshold, sending a relay cut-off signal to the power battery system; wherein the relay cut-off signal is used to cut off the relay of the power battery system.

[0060] The duration threshold can be preset as needed. The power battery system can transmit data with the network communication device through the battery management system in the power battery system. The relay switching signal belongs to the IO input / output) drive signal.

[0061] Specifically, the network communication device can record the time when the data sent by the battery management system in the power battery system was last received. When the time from that time to the current time reaches the time threshold, it is determined that the CAN network communication between the network communication device and the battery management system has failed, so that the network communication device sends a relay cut-off signal to the battery management system, so that the battery management system switches the relay in the power battery system to ensure the safety of the power battery system.

[0062] In some embodiments, when the duration between the last time data was received from the upper-level control end and the current time reaches a duration threshold, that is, the data from the upper-level control end cannot be received normally within the specified time, a hard-line IO drive signal is sent to the upper-level control end, such as the energy management system. The upper-level control end responds to the hard-line IO drive signal to instruct the battery management system to switch the relays in the power battery system. For example, the upper-level control end can send a relay cut-off signal to the network communication device, and the network communication device forwards the relay cut-off signal to the battery management system, so that the battery management system switches the relays in the power battery system to ensure the safety of the power battery system.

[0063] In this embodiment, if the data sent by the battery management system cannot be received normally within the specified time, the relay is cut off, thereby improving the safety of the power battery system.

[0064] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0065] Based on the same inventive concept, the embodiment of the present application also provides a power battery system calibration device for implementing the power battery system calibration method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more power battery system calibration device embodiments provided below can refer to the limitations of the power battery system calibration method above, and will not be repeated here.

[0066] In some embodiments, as shown in FIG. 5 , a power battery system calibration device is provided, including: a calibration instruction receiving module 502 , an instruction conversion module 504 and a parameter calibration module 506 , wherein:

[0067] The calibration instruction receiving module 502 is used to receive a first calibration instruction for a power battery system in the energy storage system, which is sent by an energy management system in the energy storage system using a first communication protocol. The power battery system in the energy storage system is a power battery system for cascade utilization. The network communication device is used for the power battery system to communicate with the energy management system. The energy storage system includes multiple power battery systems of different communication types.

[0068] The instruction conversion module 504 is used to determine the second communication protocol adopted by the power battery system, and convert the first calibration instruction into a second calibration instruction that complies with the second communication protocol, and the first communication protocol is different from the second communication protocol.

[0069] The parameter calibration module 506 is used to send a second calibration instruction to the battery management system in the power battery system, so that the battery management system performs parameter calibration on the power battery system according to the second calibration instruction.

[0070] In some embodiments, the power battery system calibration device also includes a calibration instruction generation module, which is used to generate a third calibration instruction for the power battery system that complies with the second communication protocol; the parameter calibration module 506 is also used to send the third calibration instruction to the power battery system so that the power battery system calibrates the power battery system according to the third calibration instruction.

[0071] In some embodiments, the third calibration instruction carries calibration parameters applicable to the power battery system in the energy storage system, and the power battery system calibration device also includes a calibration parameter determination module, which is used to obtain relevant information of the power battery system and electrical performance indicators of the energy storage system; determine the calibration parameters applicable to the power battery system in the energy storage system based on the relevant information of the power battery system and the electrical performance indicators of the energy storage system.

[0072] In some embodiments, the first calibration instruction is triggered by the energy management system in response to a received calibration request for the power battery system.

[0073] In some embodiments, the network communication device is also used to send a relay cut-off signal to the power battery system to instruct the cut-off of the relay in the power battery system when it is determined that a fault has occurred in the power battery system; and to send relevant status information corresponding to the fault to the energy management system.

[0074] In some embodiments, the network communication device is also used to send a relay cut-off signal to the power battery system when the time between the last time data was received from the power battery system and the current time reaches a time threshold; wherein the relay cut-off signal is used to cut off the relay of the power battery system.

[0075] Each module in the above power battery system calibration device can be implemented in whole or in part by software, hardware and their combination. Each module can be embedded in or independent of the processor in the network communication device in the form of hardware, or can be stored in the memory in the network communication device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0076] In some embodiments, a network communication device is provided, which may be a server, and its internal structure diagram may be shown in FIG6. The network communication device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the network communication device is used to provide computing and control capabilities. The memory of the network communication device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the network communication device is used to store data involved in the power battery system calibration method. The input / output interface of the network communication device is used to exchange information between the processor and the external device. The communication interface of the network communication device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a power battery system calibration method is implemented.

[0077] Those skilled in the art will understand that the structure shown in FIG. 6 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the network communication device to which the scheme of the present application is applied. The specific network communication device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0078] In some embodiments, a network communication device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0079] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0080] In some embodiments, a computer program product is provided, including a computer program, which implements the steps in the above-mentioned method embodiments when executed by a processor.

[0081] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0082] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0083] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0084] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power battery system calibration method, characterized in that: The method is executed by a network communication device in the energy storage system, the network communication device is used for the power battery system to communicate with the energy management system, and the energy storage system includes a plurality of power battery systems of different communication types. The method includes: Receiving a first calibration instruction for a power battery system in the energy storage system sent by an energy management system in the energy storage system using a first communication protocol, wherein the power battery system in the energy storage system is a power battery system for cascade utilization; Determining a second communication protocol used by the power battery system, and converting the first calibration instruction into a second calibration instruction that complies with the second communication protocol, wherein the first communication protocol is different from the second communication protocol; The second calibration instruction is sent to a battery management system in the power battery system, so that the battery management system performs parameter calibration on the power battery system according to the second calibration instruction.

2. The method according to claim 1, characterized in that The method further comprises: generating a third calibration instruction for the power battery system that complies with the second communication protocol; The third calibration instruction is sent to the power battery system, so that the power battery system calibrates the power battery system according to the third calibration instruction.

3. The method according to claim 2, characterized in that The third calibration instruction carries calibration parameters applicable to the power battery system in the energy storage system. Before generating the third calibration instruction conforming to the second communication protocol, the method further includes: Acquire relevant information of the power battery system and electrical performance indicators of the energy storage system; According to the relevant information of the power battery system and the electrical performance index of the energy storage system, the calibration parameters of the power battery system applicable to the energy storage system are determined.

4. The method according to claim 1, characterized in that: The first calibration instruction is triggered by the energy management system in response to a received calibration request for the power battery system.

5. The method according to claim 1, characterized in that The method further comprises: When it is determined that the power battery system fails, sending a relay cut-off signal to the power battery system to instruct to cut off the relay in the power battery system; Relevant status information corresponding to the fault is sent to the energy management system.

6. The method according to claim 1, characterized in that The method further comprises: When the time between the last time data from the power battery system is received and the current time reaches a time threshold, a relay cut-off signal is sent to the power battery system; Wherein, the relay cut-off signal is used to cut off the relay of the power battery system.

7. A power battery system calibration device, belonging to a network communication device in an energy storage system, characterized in that: The device comprises: A calibration instruction receiving module is used to receive a first calibration instruction for a power battery system in the energy storage system sent by an energy management system in the energy storage system using a first communication protocol, wherein the power battery system in the energy storage system is a power battery system for cascade utilization; the network communication device is used for the power battery system to communicate with the energy management system, and the energy storage system includes a plurality of power battery systems of different communication types; an instruction conversion module, configured to determine a second communication protocol adopted by the power battery system, and convert the first calibration instruction into a second calibration instruction conforming to the second communication protocol, wherein the first communication protocol is different from the second communication protocol; The parameter calibration module is used to send the second calibration instruction to the battery management system in the power battery system, so that the battery management system performs parameter calibration on the power battery system according to the second calibration instruction.

8. A network communication device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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