CN115173514A - Energy storage battery management system, method and application - Google Patents

Abstract

The present application discloses an energy storage battery management system, comprising: a host computer; a main control module, including a first main control unit and a second main control unit that are redundantly backed up with each other, and respectively pass through respective third and fourth communication interfaces Connect with the first and second communication interfaces of the host computer to form first and second communication links; several slave control modules are respectively connected to the fifth communication interface of the first master control unit through their respective seventh communication interfaces and the sixth communication interface of the second main control unit, access the first communication link; and connect the sixth communication interface of the second main control unit and the fifth communication interface of the first main control unit through the eighth communication interface, connect into the second communication link; several battery modules, the state information of the corresponding battery modules is collected by the slave control module and fed back to the main control module; the charging contactor and the discharge contactor are controlled by the main control module respectively. It can solve the problem that the multiple control units of the existing battery management system are all connected to the same bus, which leads to the problem that the entire line cannot work normally when a certain node fails.

Description

An energy storage battery management system, method and application

technical field

The present application relates to the field of battery technology, and more particularly, to an energy storage battery management system, an energy storage battery management method, an electronic device, and a computer-readable storage medium.

Background technique

The energy storage battery management system is usually used as a backup power supply outside the grid power supply. When the grid fails and cannot continue to supply power to the load, the system will switch to the battery power supply mode to support the normal operation of the load. Since the voltage of a single battery is low enough to meet the power supply requirements of most loads, the energy storage battery management system is usually composed of multiple single cells in series and parallel. Due to the difference between the single cells and the phenomenon of insufficient battery power or battery overshoot during the battery charging and discharging process, the normal power supply of the battery pack and the stable and reliable operation of the battery pack will be affected. Therefore, it is necessary to detect and monitor the voltage of each single cell during the use of the battery, and then take equalization measures to maintain the consistent characteristics of the battery cells. In addition, the battery pack has a large working current and is generally installed in a confined and narrow space. Therefore, the temperature of the battery pack is often very high, which will endanger the life of the battery pack, and the status detection of the battery pack is required. A battery management system (BMS) is used to detect and manage battery status while interacting and communicating with users.

The existing battery management system adopts a master-slave topology, also known as a distributed structure, and uses the CAN bus to manage and communicate with each unit. , the entire line will not work properly.

SUMMARY OF THE INVENTION

In view of at least one defect or improvement requirement of the prior art, the present invention provides an energy storage battery management system, method and application thereof, aiming at solving the problem that multiple control units of the existing battery management system are all connected to the same bus, resulting in When a node fails, the entire line cannot work properly.

In order to achieve the above object, according to the first aspect of the present invention, an energy storage battery management system is provided, including: a host computer, including a first communication interface and a second communication interface; a main control module, including a mutual redundant backup. The first main control unit and the second main control unit are respectively connected with the first communication interface of the upper computer through their respective third communication interfaces to form a first communication link, and communicate with the host computer through their respective fourth communication interfaces. The second communication interface of the upper computer is connected to form a second communication link; several slave control modules are respectively connected to the fifth communication interface of the first master control unit and the The sixth communication interface of the second main control unit is connected to the first communication link; and the sixth communication interface of the second main control unit and the first main control unit are connected through respective eighth communication interfaces The fifth communication interface of the battery module is connected to the second communication link; several battery modules are respectively connected to the corresponding slave control modules, so that the state information of the battery modules can be collected and fed back by the slave control modules. to the main control module; the charging contactor and the discharging contactor are respectively controlled and operated by the main control module, wherein the charging contactor is connected between the battery module and the power grid, and the discharging contactor is connected to the main control module. between the battery module and the load.

In an embodiment of the present invention, each of the slave control modules includes a first slave control unit and a second slave control unit that are redundant backups for each other, respectively including the corresponding seventh communication interface and the eighth Communication Interface.

In an embodiment of the present invention, the first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the fifth communication interface, and the sixth communication interface , The seventh communication interface and the eighth communication interface both adopt CAN communication interface.

In an embodiment of the present invention, the charging contactor includes a first charging contact unit and a second charging contact unit that are redundant with each other, and are respectively connected to the first main control unit and the second main control unit ; The discharge contactor comprises a first discharge contact unit and the second discharge contact unit which are redundant backups for each other, and are respectively connected to the first main control unit and the second main control unit.

In an embodiment of the present invention, the charging contactor and the discharging contactor are connected to the power grid and the load through a converter.

According to the second aspect of the present invention, there is also provided an energy storage battery management method, which is applicable to the energy storage battery management system described in any one of the above-mentioned embodiments. According to the control instruction, the power grid is controlled to charge the battery module when the charging contactor is closed, and the load is controlled to discharge the battery module when the discharge contactor is closed; wherein, the first control unit and the second control unit of the main control module pass through their respective first control units and second control units. The third communication interface and the fourth communication interface are connected to the first communication interface and the second communication interface of the upper computer to form a dual communication link redundancy backup; the state information of the corresponding battery module is obtained by the slave control module and fed back to the master The main control module forwards the status information to the upper computer to form a closed control loop; wherein, the slave control modules are connected to the fifth communication of the first main control unit through respective seventh communication interfaces interface and the sixth communication interface of the second main control unit, access the first communication link; and connect the sixth communication interface of the second main control unit and the first communication link through respective eighth communication interfaces A fifth communication interface of the master control unit is connected to the second communication link to form a cross redundancy backup between the master control module and the slave control module.

In an embodiment of the present invention, the obtaining by the slave control module the status information of the corresponding battery module and feeding it back to the master control module includes: a first slave control unit whose slave control modules are redundant backups for each other. Both the unit and the second slave control unit acquire the state information of the corresponding battery module, and are fed back to the master control unit by the first slave control unit and the second slave control unit.

In an embodiment of the present invention, the controlling the power grid to charge the battery module when the charging contactor is closed according to the control instruction, and controlling the load to discharge the battery module when the discharging contactor is closed includes: controlling the first main control unit by the first main control unit and the second main control unit are respectively connected to the first charging contact unit and the second charging contact unit whose charging contactors are redundant with each other, and the first discharging contact unit whose discharging contactors are redundant with each other and the second discharge contact unit to send control instructions to control the action of the charging contactor and the discharging contactor.

According to a third aspect of the present invention, there is also provided an electronic device comprising at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, when the computer program is processed by the When the unit is executed, the processing unit is caused to execute the steps of the method described in any one of the foregoing embodiments.

According to a fourth aspect of the present invention, there is also provided a computer-readable storage medium storing a computer program executable by an access authentication device, and when the computer program runs on the access authentication device, causes the access authentication The device performs the steps of the method described in any one of the above embodiments.

In general, compared with the prior art, the above technical solutions conceived by the present invention can at least achieve the following beneficial effects:

1) Through the dual redundant hot backup of the main control module in the hardware and electrical design, the two main control units each include four communication interfaces, and the third and fourth communication interfaces are respectively connected to the first and second communication interfaces of the host computer, Two communication networks that back up each other are formed, and the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit are connected to the seventh communication interface of the slave control unit, and the fifth communication interface of the second master control unit The interface and the sixth communication interface of the first master control unit are connected to the eighth communication interface of the slave control unit, which realizes the communication structure of cross redundancy backup between the master control unit and the slave control unit, and the anti-interference ability of the two-way communication network is greatly improved. Enhanced, even if the fifth or sixth communication interface of the main control module fails, the two-way communication network it accesses can still run stably;

2) The slave control unit, charging contactor and discharge contactor all use 1+1 redundant hot backup to ensure the reliable operation of the module itself, and the connection between each module adopts two parallel connections to ensure the reliability of the connection , which can be applied to occasions that require the reliability of the power supply system.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an energy storage battery management system provided by an embodiment of the present application;

FIG. 2 is a flowchart of an energy storage battery management method provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The terms "first", "second", "third" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

As shown in FIG. 1 , the first embodiment of the present invention proposes an energy storage battery management system (Battery Manage System, BMS), which includes, for example, a host computer, a master control module, several slave control modules, and a one-to-one correspondence with the slave control modules Several battery modules, a charging contactor, a discharging contactor and a charging contactor control the connected power supply grid and the discharging contactor controls the connected load.

Among them, the host computer mentioned is, for example, a personal computer, a handheld device, a portable device, a tablet device, a multiprocessor system, a microprocessor-based system, an editable consumer electronic device, a network PC, a minicomputer, a mainframe computer, Or a distributed computing environment including any of the above systems or devices, and so on. For example, the communication between the upper computer and the main control module adopts the 1+1 hot backup mode. Specifically, the upper computer includes a first communication interface and a second communication interface, and the third communication interface of the main control module is connected to the first communication interface of the upper computer. The communication interface is connected to form a first communication link, and the fourth communication interface is connected to the second communication interface of the upper computer to form a second communication link.

Further, the main control module includes, for example, a first main control unit and a second main control unit that are redundant with each other, and the main control unit mentioned is a battery management unit (Battery management Unit, BMU), which is used to communicate and interact with the host computer. , obtain the control command of the host computer to control the grid to charge the battery module when the charging contactor is closed, and control the load to discharge the battery module when the discharge contactor is closed.

In addition to the above-mentioned third communication interface and fourth communication interface, the two main control units also have a fifth communication interface and a sixth communication interface, and several slave control modules are respectively connected to the first main control unit through their respective seventh communication interfaces. The fifth communication interface of the second main control unit and the sixth communication interface of the second main control unit are connected to the first communication link; and the sixth communication interface of the second main control unit and the first main control unit are connected through respective eighth communication interfaces. The fifth communication interface of the control unit is connected to the second communication link. In this way, the communication structure of cross redundancy backup between the master control unit and the slave control unit is realized, and the anti-interference ability of the two-way communication network is greatly enhanced. Even if the fifth or sixth communication interface of the master control module fails, its access The two-way communication network can still operate stably.

Further, each slave control module includes, for example, a first slave control unit and a second slave control unit that are redundant backups for each other, and the first slave control unit and the second slave control unit both include the corresponding seventh communication interface and eighth The communication interface is connected with the first main control unit and the second main control unit in the manner of the above-mentioned cross redundancy backup, so as to further improve the reliability of the system. Among them, the mentioned slave control unit is a cell monitor unit (Cell monitor Unit, CMU), which is used to measure the voltage, current, temperature and other status information of the corresponding battery module, and feed it back to the main control module BMU. The BMU can evaluate the data transmitted by the CMU. If the data is abnormal, it will protect the battery, issue a request to reduce the current, or cut off the charging and discharging path to prevent the battery from exceeding the permitted use conditions. manage. In addition, according to the previously designed control strategy, the parameters and states that need to be alerted can be judged, and the alert information can be sent to the upper computer, and finally conveyed to the operator.

Further, the first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the fifth communication interface, the sixth communication interface, and the seventh communication interface For example, both the interface and the eighth communication interface adopt CAN communication interface, so as to form two CAN bus communication networks between the host computer, the master control module and the slave control module, so as to improve the reliability of the system.

The charging contactor is connected between the battery module and the power grid, and the discharging contactor is connected between the battery module and the load, and is controlled by the main control module to realize the on-off of the charging circuit and the discharging circuit. Specifically, for example, the main control unit performs judgment processing after receiving the battery pack status information. If the battery pack is in a fully charged state, the main control unit controls the discharge contactor to close, so that the battery pack discharges the load; if the battery pack power is lower than a certain level Then the main control unit controls the charging contactor to close, so that the power grid charges the battery pack. Converters are connected between the charging contactor and the power grid and between the discharging contactor and the load to realize AC-DC conversion or DC-AC conversion.

Further, the charging contactor includes, for example, a first charging contact unit and a second charging contact unit that are redundant with each other, and are respectively connected to the first main control unit and the second main control unit; the discharge contactor includes a mutual redundant backup. The first discharge contact unit and the second discharge contact unit are respectively connected to the first master control unit and the second master control unit, so that the slave control unit, the charging contactor and the discharge contactor all adopt 1+1 redundancy The hot backup ensures the reliable operation of the module itself, and the connection between each module adopts two parallel connections to ensure the reliability of the connection, which can be applied to the occasions that require the reliability of the power supply system.

To sum up, the energy storage battery management system proposed by the first embodiment of the present invention adopts dual redundant hot backup of the main control module in the hardware and electrical design, and each of the two main control units includes four communication interfaces. 3. The fourth communication interface is respectively connected to the first and second communication interfaces of the upper computer to form two communication networks backed up by each other, and the fifth communication interface of the first main control unit and the sixth communication interface of the second main control unit The seventh communication interface of the slave control unit is connected, the fifth communication interface of the second master control unit and the sixth communication interface of the first master control unit are connected to the eighth communication interface of the slave control unit, realizing the master control unit and the slave control unit. The communication architecture of the cross-redundant backup between the two communication networks greatly enhances the anti-interference ability of the two-way communication network. Even if the fifth or sixth communication interface of the main control module fails, the two-way communication network connected to it can still operate stably; the slave control unit , Both the charging contactor and the discharging contactor use 1+1 redundant hot backup to ensure the reliable operation of the module itself. Where the reliability of the power supply system is required.

The second embodiment of the present invention also proposes a method for managing an energy storage battery, which includes, for example, step S1: the main control module obtains a control command from a host computer, controls the power grid to charge the battery module when the charging contactor is closed according to the control command, and controls When the discharge contactor is closed, the load discharges the battery module; wherein, the first control unit and the second control unit of the main control module are connected to the first communication interface of the upper computer through the respective third communication interface and fourth communication interface and the second communication interface to form a dual communication link redundancy backup; Step S2: the slave control module acquires the state information of the corresponding battery module and feeds it back to the master control module, and the master control module forwards the state information to The host computer forms a closed control loop; wherein, the slave control module is connected to the fifth communication interface of the first main control unit and the sixth communication interface of the second main control unit through respective seventh communication interfaces, accessing the first communication link; and connecting the sixth communication interface of the second main control unit and the fifth communication interface of the first main control unit through respective eighth communication interfaces, and accessing the first communication interface Two communication links form a cross redundant backup between the master control module and the slave control module.

It is worth mentioning that the energy storage battery management method disclosed in the second embodiment of the present invention is applicable to the energy storage battery management system proposed in the first embodiment. The content described in the embodiment will not be described in detail here for the sake of brevity, and the method for launching and controlling a continuous missile provided by this embodiment has the same beneficial effects as the energy storage battery management system provided by the first embodiment.

In addition, the third embodiment of the present invention also provides an electronic device, for example, comprising: at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit During execution, the processing unit is caused to execute the method described in the first embodiment, and the beneficial effects of the electronic device provided by this embodiment are the same as those of the energy storage battery management method provided by the first embodiment.

In addition, the fourth embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps of the above-mentioned energy storage battery management method, and the computer provided in this embodiment can The beneficial effects of reading the storage medium are the same as those of the energy storage battery management method provided by the third embodiment.

Among them, the computer-readable storage medium may include, but is not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, micro-drives, and magneto-optical disks, ROM, RAM, EPROM, EEPROM, DRAM, VRAM, flash memory devices , magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and/or data.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Because in accordance with the present application, certain steps may be performed in other orders or concurrently. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some service interfaces, indirect coupling or communication connection of devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art, or all or part of the technical solution, and the computer software product is stored in a memory, Several instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: flash memory disk, read-only memory (Read-Only Memory, ROM), random access device (Random Access Memory, RAM), magnetic disk or optical disk, etc.

The above descriptions are merely exemplary embodiments of the present disclosure, which cannot limit the scope of the present disclosure. That is, all equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. Embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional techniques in the art not described in this disclosure . The specification and examples are to be regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, etc., All should be included within the protection scope of the present invention.

Claims (10)

1. An energy storage battery management system, comprising: a host computer, including a first communication interface and a second communication interface; The main control module includes a first main control unit and a second main control unit that are redundant with each other, and are respectively connected with the first communication interface of the upper computer through respective third communication interfaces to form a first communication link , and connect with the second communication interface of the upper computer through the respective fourth communication interface to form a second communication link; Several slave control modules are respectively connected to the fifth communication interface of the first main control unit and the sixth communication interface of the second main control unit through their respective seventh communication interfaces, and are connected to the first communication link and connect the sixth communication interface of the second main control unit and the fifth communication interface of the first main control unit through respective eighth communication interfaces, and access the second communication link; A plurality of battery modules are respectively connected to the respective slave control modules, so that the state information of the battery modules is collected by the slave control modules and fed back to the master control module; The charging contactor and the discharging contactor are respectively controlled and operated by the main control module, wherein the charging contactor is connected between the battery module and the power grid, and the discharging contactor is connected between the battery module and the load . 2 . The energy storage battery management system according to claim 1 , wherein each of the slave control modules includes a first slave control unit and a second slave control unit that are redundant backups for each other, and both include corresponding The seventh communication interface and the eighth communication interface. 3 . The energy storage battery management system according to claim 1 , wherein the first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the The fifth communication interface, the sixth communication interface, the seventh communication interface and the eighth communication interface all use CAN communication interfaces. 4 . The energy storage battery management system according to claim 1 , wherein the charging contactor comprises a first charging contact unit and a second charging contact unit which are redundant backups for each other, and are respectively connected to the first charging contact unit. 5 . control unit and the second main control unit; the discharge contactor includes a first discharge contact unit and the second discharge contact unit that are redundant backup for each other, and are respectively connected to the first main control unit and the second discharge contact unit. Two main control units. 5 . The energy storage battery management system according to claim 1 , wherein the charging contactor and the discharging contactor are connected to the power grid and the load through a converter. 6 . 6. An energy storage battery management method, characterized in that it is applicable to the energy storage battery management system according to any one of claims 1 to 5, comprising: The main control module obtains the control instructions of the host computer, and controls the power grid to charge the battery module when the charging contactor is closed according to the control instructions, and controls the load to discharge the battery module when the discharge contactor is closed; wherein, the first control module of the main control module The control unit and the second control unit are connected to the first communication interface and the second communication interface of the upper computer through the respective third communication interface and the fourth communication interface, so as to form dual communication link redundancy backup; The state information of the corresponding battery module is acquired by the slave control module and fed back to the master control module, and the master control module forwards the state information to the upper computer to form a closed control loop; The seventh communication interface is connected to the fifth communication interface of the first main control unit and the sixth communication interface of the second main control unit, and is connected to the first communication link; and through the respective eighth communication interfaces Connect the sixth communication interface of the second main control unit and the fifth communication interface of the first main control unit, and connect to the second communication link to form the main control module and the slave control module Cross redundant backup between. 7 . The energy storage battery management method according to claim 6 , wherein the obtaining state information of the corresponding battery module by the slave control module and feeding it back to the master control module, comprising: 8 . The first slave control unit and the second slave control unit, which are redundant backups of each of the slave control modules, both acquire the status information of the corresponding battery module, and the first slave control unit and the second slave control unit obtain the status information of the corresponding battery module. feedback to the main control unit. 8 . The energy storage battery management method according to claim 6 , wherein the grid charges the battery module when the charging contactor is controlled to be closed according to the control instruction, and the load discharges the battery module when the discharge contactor is controlled to close, 8 . include: The first main control unit and the second main control unit are respectively connected to the first charging contact unit and the second charging contact unit whose charging contactors are redundant with each other, and the discharging contactors are redundant with each other. The redundant first discharge contact unit and the second discharge contact unit are used to send control instructions to control the actions of the charging contactor and the discharging contactor. 9. An electronic device, comprising at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the The processing unit performs the steps of the method of any of claims 6-8. 10. A computer-readable storage medium, characterized in that it stores a computer program executable by an access authentication device, and when the computer program runs on the access authentication device, makes the access authentication device execute claims 6- The steps of any one of the methods in 8.

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