CN110300042B - Bus communication system and communication control method - Google Patents
Bus communication system and communication control method Download PDFInfo
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- CN110300042B CN110300042B CN201910672371.7A CN201910672371A CN110300042B CN 110300042 B CN110300042 B CN 110300042B CN 201910672371 A CN201910672371 A CN 201910672371A CN 110300042 B CN110300042 B CN 110300042B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
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Abstract
The invention provides a bus communication system and a control method based on bus communication, wherein the system comprises a master control module and one or more slave control modules connected with the master control module in parallel in a bus communication mode, the system is set to enable the master control module to send instructions to the one or more slave control modules through a communication bus, the slave control modules respond to the master control module based on the change of the states of the slave control modules after receiving the instructions sent by the master control module, and the system can remarkably improve the communication efficiency, shorten the communication time and improve the real-time performance of event response.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a bus communication system and a communication control method.
Background
The bus communication technology is mainly characterized in that all equipment communication and control are based on one bus, the bus communication technology is a fully distributed intelligent control network technology, product modules of the bus communication technology have bidirectional communication capacity and interoperability and interchangeability, and control components of the bus communication technology can be programmed.
Bus communication generally adopts a master-slave mode communication mode, a host computer initiates a command (including the address of an accessed slave computer), the accessed slave computer needs to respond after receiving the command, both communication parties in the process are ensured to be confirmed, the host computer can initiate the command to the next slave computer again after receiving and processing the response of the slave computer, and the mode also has a timeout retransmission mechanism. The method has the problems of long communication time, low communication efficiency, untimely event response and the like, and particularly under the condition that a plurality of slaves are arranged on a bus, when a master needs to access each slave on the bus, no matter what type of command is, the master needs to ask one answer, the master needs to ask all the slaves very time, and the master often cannot obtain the timely polling and response of the master when the master is asked for an emergency event of a certain slave.
The existing intelligent household product comprises two communication tasks of TCP/IP network communication and wired bus intelligent household communication, when one single chip microcomputer is used for executing all tasks, the single chip microcomputer not only needs to process the network communication tasks, but also needs to respond to the bus intelligent household communication tasks in time. When the load on the network communication is large, the network communication needs to be ensured in time to avoid data packet drop and influence on the communication efficiency, but the data instruction of the bus communication system is very easy to cause unable timely processing, which results in signal blocking or control delay on a certain part of the system, greatly reducing the control efficiency, thereby causing event delay response, loss and even system blocking downtime, and greatly reducing the user experience of the product.
Based on the above-mentioned defects in the prior art, a fast communication system and method for improving communication efficiency, shortening communication time, and improving real-time performance of event response are needed.
Disclosure of Invention
The present invention will be described in detail below.
According to an aspect of the present invention, there is provided a bus communication system including a master module, and one or more slave modules connected in parallel in bus communication with the master module.
In some embodiments, the system is configured such that the master module sends instructions to the one or more slave modules via the communication bus, and the slave modules respond to the master module based on a change in status of the slave modules after receiving the instructions sent by the master module.
In this embodiment, after receiving the instruction sent by the master control module, the slave control module responds to the master control module based on the change of the slave control module state as follows: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond.
In some embodiments, the system is configured such that the master module sends an instruction to one of the one or more slave modules via the communication bus, and the master module performs the request processing according to the response received from the slave module within a period of time after sending the instruction.
In this embodiment, if the master control module receives a response from the slave control module within a period of time after sending the instruction, the master control module processes the response; and if the response of the slave control module is not received, continuing to send the instruction to the next slave control module and carrying out request processing according to the condition of receiving the response of the slave control module within a period of time after the instruction is sent.
According to another aspect of the present invention, there is also provided a bus communication system, which includes a master control module, one or more slave control modules connected in parallel with the master control module in a bus communication manner, and a function module disposed in cooperation with the slave control modules.
In some embodiments, the system is configured such that the master module sends instructions to the one or more slave modules via the communication bus, and the slave modules respond to the master module based on a change in status of the slave modules after receiving the instructions sent by the master module.
In this embodiment, after receiving the instruction sent by the master control module, the slave control module responds to the master control module based on the change of the slave control module state as follows: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond.
In some embodiments, the system is configured such that the master module sends an instruction to one of the one or more slave modules via the communication bus, and the master module performs the request processing according to the response received from the slave module within a period of time after sending the instruction.
In this embodiment, if the master control module receives a response from the slave control module within a period of time after sending the instruction, the master control module processes the response; and if the response of the slave control module is not received, continuing to send the instruction to the next slave control module and carrying out request processing according to the condition of receiving the response of the slave control module within a period of time after the instruction is sent.
In some embodiments, the functional module includes two computing chips, one of the two computing chips is connected to the network data interface, the other of the two computing chips is connected to the communication bus, and the two computing chips are connected to each other through a serial port.
In some embodiments, the system is configured to process network data communication and bus system communication through the two computing chips, respectively, wherein the computing chip connected to the network data interface is configured to receive and process network data through a software program, and the computing chip connected to the communication bus is configured to respond to and process instructions sent by the master control module through the communication bus.
According to another aspect of the present invention, there is also provided a control method based on bus communication, the method being applied to a bus communication system as described above, the system including a master control module, one or more slave control modules connected in parallel with the master control module in a bus communication manner, and a function module disposed in cooperation with the slave control modules, the method including:
the master control module sends an instruction to the one or more slave control modules through the communication bus, the slave control modules respond to the master control module based on the change of the states of the slave control modules after receiving the instruction sent by the master control module, and in some embodiments, the slave control modules respond to the master control module based on the change of the states of the slave control modules after receiving the instruction sent by the master control module as follows: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond;
the master control module performs request processing according to the condition of receiving the response of the slave control module within a period of time after sending the instruction, and in some embodiments, the master control module processes the response of the slave control module if receiving the response within a period of time after sending the instruction; if the response of the slave control module is not received, continuing to send the instruction to the next slave control module, and performing request processing according to the condition of receiving the response of the slave control module within a period of time after the instruction is sent, and repeating the steps; and
the computing chip connected with the network data interface receives and processes network data through a software program, and the computing chip connected with the communication bus responds and processes instructions sent by the main control module through the communication bus.
According to another aspect of the present invention, there is also provided a smart home control system, which includes the bus communication system as described above in the specification.
Drawings
FIG. 1 is a schematic diagram illustrating the connection of various modules of a bus communication system according to one embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a functional module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be noted that these representative embodiments are only used for explaining and illustrating the technical solution of the present invention, and the present invention is not limited to these specific embodiments. Any combination, variation, and modification of the described embodiments, in accordance with the substance of the present invention, is within the scope of the claimed invention.
In order that the invention may be more readily understood, some definitions of the terms used herein will be set forth in the description of the invention.
According to the invention, a bus communication system is provided, which comprises a master control module and one or more slave control modules connected with the master control module in parallel in a bus communication manner. Fig. 1 shows an embodiment of the bus communication system according to the invention. As shown in fig. 1, the master control module is connected in parallel with a plurality of slave control modules through a bus, and terminal matching resistors are connected in parallel on signal lines of the master control module and the tail-end slave control modules. In this embodiment, the bus is an RS485 bus. In one embodiment, the master module may be connected in parallel with fewer than 32 slave modules. In another embodiment, the master module may be connected in parallel with 2-31 slave modules. In another embodiment, the master module may be connected in parallel with 3-30 slave modules. In another embodiment, the master module may be connected in parallel with 4-29 slave modules. In another embodiment, the master module may be connected in parallel with 5-28 slave modules. In another embodiment, the master module may be connected in parallel with 6-27 slave modules. In another embodiment, the master module may be connected in parallel with 7-26 slave modules. In another embodiment, the master module may be connected in parallel with 8-25 slave modules. In another embodiment, the master module may be connected in parallel with 9-24 slave modules. In another embodiment, the master module may be connected in parallel with 10-23 slave modules. In another embodiment, the master module may be connected in parallel with 11-22 slave modules. In another embodiment, the master module may be connected in parallel with 12-21 slave modules. In another embodiment, the master module may be connected in parallel with 13-20 slave modules. In another embodiment, the master module may be connected in parallel with 14-19 slave modules. In another embodiment, the master module may be connected in parallel with 15-18 slave modules. In another embodiment, the master module may be connected in parallel with 16-17 slave modules. Since the number of the parallel slave control modules directly affects the communication efficiency and the processing speed of the communication system, within the range of the number of the slave control modules in the above embodiment of the present invention, the bus communication system provided by the present invention can simultaneously achieve the best effect in the aspects of communication efficiency, communication time, event response real-time property, etc. In one embodiment, the termination matching resistance is 120 ohms.
In some embodiments of the bus communication system of the present invention, the master module is configured to send the instructions to each of the slave modules in sequence in address order via the communication bus. In some embodiments, the slave module, upon receiving the instruction sent by the master module, responds to the master module based on a change in slave module status by: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond. In some embodiments, the master control module is configured to perform the request processing according to the condition of receiving the response from the slave control module within a period of time after the instruction is sent: if the master control module receives the response of the slave control module within a period of time after the master control module sends the instruction, processing the response; and if the response of the slave control module is not received, continuing to send the instruction to the next slave control module, and performing request processing according to the condition of receiving the response of the slave control module within a period of time after the instruction is sent, and repeating the steps.
In some embodiments, the master control module of the present invention employs a "dynamic wait" mechanism, and after the master control module sends an instruction and confirms that the sending is completed, the master control module waits for 1Byte baud rate time (about 2ms), and if no response is received from the slave control module during this period, the master control module determines that the slave control module is invalid, and continues to send the instruction to the next slave control module; if a response from the control module is received during this period, the slave control module waits for completion of data reception and processing. The embodiment of the invention effectively solves the problem of communication blockage caused by the abnormality of a certain slave control module on the bus, thereby improving the communication efficiency and shortening the communication time.
In some embodiments, the master control module of the present invention employs a "polling" mechanism, the master control module continuously polls the status of the slave control modules (i.e. sends an instruction to the slave control modules) according to the address sequence, if the status of the slave control modules changes, the slave control modules send a response frame, and after receiving the response frame and completing the processing, the host continues to poll the status, thereby improving the real-time performance of event response.
In some embodiments, after receiving the instruction, the slave control module immediately responds if there is an event (e.g., a change in the state of the slave control module) that needs to respond to the master control module, otherwise does not respond. Compared with the prior art that whether the slave control module has an event needing to respond or not, the slave control module needs to send response data to the master control module, the embodiment of the invention greatly improves the communication efficiency.
In the context of the present invention, the "main control module" includes a central processing unit, and may further integrate other functional elements (e.g., wireless communication elements, etc.). And the master control module exchanges data with the slave control module in a bus communication mode. The "slave control module" in the context of the present invention is a control device for the function module.
In one embodiment, the master control module is an intelligent home gateway, and the slave control module is a switch panel. In this embodiment, when each switch panel is pressed by the user and the status changes, the gateway is required to poll the event in time and perform the corresponding task (e.g., turning on or off the smart home device). The bus communication system can rapidly process the tasks of the switch panels, so that better use experience is provided for users, and the effect is more prominent when the switch panels are connected in parallel.
In some embodiments according to the invention, the bus communication system further comprises a function module arranged in cooperation with the slave module. In some embodiments, the functional module includes a computing chip and a functional element (e.g., a sensor, an infrared emitter, a motor, etc.), and the computing chip is used to pre-process the collected raw data, or let the functional element perform a specific task according to a set program and/or an instant received instruction, so as to reduce the amount of operations of the main control module and increase the functions of independent processing and operations of the functional module. In some embodiments, the computing chip is a single-chip microcomputer.
In some embodiments, the functional module includes two computing chips, one of the two computing chips is connected to the network data interface, the other of the two computing chips is connected to the communication bus, and the two computing chips are connected to each other through a serial port.
Fig. 2 shows a schematic structural diagram of the functional module according to the present invention. As shown in fig. 2, the functional module uses two low-cost singlechips to implement division of labor and cooperation to complete the tasks distributed by the singlechips. The singlechip A is connected with a network data interface and mainly processes network data and a serial port communication protocol so as to realize the receiving and sending of the network data and the communication control with the singlechip B; the singlechip B is connected with the communication bus and mainly processes bus system control instructions to realize product control of the bus intelligent home system. The singlechip A is connected with the singlechip B through a serial port.
For the singlechip A, a network port is connected to a network signal processing chip, and then the network signal processing chip is connected to the RJ45 network interface through a network transformer, so that the singlechip A can receive and process network data through a software program. The serial port 1 of the singlechip A is connected with the serial port 1 of the singlechip B to realize communication and control with the singlechip B.
And for the singlechip B, the serial port 1 of the singlechip B is connected with the serial port 1 of the singlechip A so as to realize communication and control with the singlechip A. And the serial port 2 of the singlechip B is connected to different RS485 chips through a buffer of an OD door so as to realize the processing of RS485 bus instruction signals.
Therefore, the single chip microcomputer A and the single chip microcomputer B are used for processing tasks distributed by the single chip microcomputer A and the single chip microcomputer B respectively, and the condition that the bus system control instruction is delayed and lost and is down due to large network data load is avoided. When the network data load is large, the stability of the control signal of the bus system by the singlechip B is not influenced.
In some embodiments, the functional module adopts a single chip microcomputer A with strong capacity to be responsible for TCP/IP communication and remote control communication, independently processes the task and focuses on network load; a single chip microcomputer B with weak capacity is used for processing the instant messaging polling task of the bus intelligent home and focusing on the instant event response on the bus.
The single chip microcomputer A and the single chip microcomputer B carry out information communication through serial ports, and mutual instruction communication is guaranteed.
The single chip microcomputer B can independently and quickly process equipment requests and responses on the bus intelligent home, information intercommunication is carried out with the single chip microcomputer A when necessary, product experience of local use of a user is improved, and local use of products on the bus is not affected when the single chip microcomputer A is down. The combination of the single chip microcomputer A and the single chip microcomputer B ensures high-efficiency communication, the two single chip microcomputers respectively perform their own functions and are reasonably assigned to work, the product application experience is ensured, the single chip microcomputer with high performance and high cost is avoided, and the product cost is effectively reduced.
According to the present invention, there is also provided a control method based on bus communication, the method being applied to the bus communication system according to the above embodiments, the method comprising the steps of:
(1) the master control module sequentially sends instructions to each slave control module through the communication bus according to the address sequence;
(2) the slave control module responds to the master control module based on the change of the state of the slave control module after receiving the instruction sent by the master control module: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond;
(3) after the main control module sends the instruction and confirms that the sending is finished, the request processing is carried out according to the condition of receiving the response of the slave control module within the time of 1Byte baud rate: if the master control module receives a request related to the state change of the slave control module within 1Byte baud rate time after the command is sent, the request is processed; if the response of the slave control module is not received within 1Byte baud rate time after the instruction is sent, continuing to send the instruction to the next slave control module, and repeating the steps.
In some embodiments, the bus communication-based control method of the present invention further comprises the steps of:
(4) the computing chip connected with the network data interface receives and processes network data through a software program, the computing chip connected with the communication bus receives an instruction sent by the master control module through the communication bus, and responds to the master control module based on the change of the state of the slave control module: when the state of the slave control module is changed, the computing chip sends a request related to the state change to the master control module, and controls the slave control module to carry out corresponding state change according to a processing instruction sent back by the master control module; when the state of the slave control module is not changed, the computing chip does not respond.
According to the invention, an intelligent home control system is also provided, the system comprises the bus communication system according to the above embodiments, and when the intelligent home control system is used, the bus communication-based control method according to the above embodiments is executed.
The invention has been described in detail with reference to the preferred embodiments and illustrative examples. It should be noted, however, that these specific embodiments are only illustrative of the present invention and do not limit the scope of the present invention in any way. Various modifications, equivalent substitutions and alterations can be made to the technical content and embodiments of the present invention without departing from the spirit and scope of the present invention, and these are within the scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (8)
1. The bus communication system is characterized by comprising a master control module and one or more slave control modules which are connected with the master control module in parallel in a bus communication mode; the system is arranged such that the master control module sends instructions to the one or more slave control modules via the communication bus, the slave control modules responding to the master control module upon receiving the instructions sent by the master control module based on a change in status of the slave control modules; after receiving the instruction sent by the master control module, the slave control module responds to the master control module based on the change of the state of the slave control module in the following way: when the state of the slave control module is changed, the slave control module sends a request related to the state change to the master control module; when the state of the slave control module is not changed, the slave control module does not respond.
2. The system of claim 1, wherein the system is configured such that the master module sends a command to one of the one or more slave modules via the communication bus, and the master module performs the request processing according to the response received from the slave module within a period of time after sending the command.
3. The system of claim 2, wherein the master control module processes the response of the slave control module if the response is received within a period of time after the command is sent; and if the response of the slave control module is not received, continuing to send the instruction to the next slave control module and carrying out request processing according to the condition of receiving the response of the slave control module within a period of time after the instruction is sent.
4. A bus communication system, the system comprising:
the master control module of any one of claims 1 to 3;
one or more slave control modules according to any one of claims 1 to 3; and the functional module is matched with the slave control module.
5. The system of claim 4, wherein the functional module comprises two computing chips, one of the two computing chips is connected to the network data interface, the other of the two computing chips is connected to the communication bus, and the two computing chips are connected to each other through a serial port.
6. The system of claim 5, wherein the system is configured to process network data communication and bus system communication through the two computing chips, respectively, wherein the computing chip connected to the network data interface is configured to receive and process network data through a software program, and the computing chip connected to the communication bus is configured to respond to and process instructions sent by the master control module through the communication bus.
7. A control method based on bus communication, which is applied to the bus communication system according to any one of claims 1 to 6, and comprises the following steps:
the master control module sends an instruction to the one or more slave control modules through a communication bus, and the slave control modules respond to the master control module based on the change of the states of the slave control modules after receiving the instruction sent by the master control module;
the master control module carries out request processing according to the condition of receiving the response of the slave control module within a period of time after sending the instruction; and
one computing chip connected with the network data interface receives and processes network data through a software program, and the other computing chip connected with the communication bus responds and processes instructions sent by the main control module through the communication bus.
8. An intelligent home control system, characterized in that the system comprises a bus communication system according to any one of claims 1 to 6.
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| CN113485135B (en) * | 2021-06-28 | 2023-10-24 | 青岛海尔科技有限公司 | Event processing method and device, storage medium and electronic device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025632A (en) * | 2007-03-23 | 2007-08-29 | 南京航空航天大学 | Track type conveyor control device |
| CN101571840A (en) * | 2009-06-05 | 2009-11-04 | 四川长虹电器股份有限公司 | Two-line unclocked data interaction method |
| CN102081585A (en) * | 2010-12-30 | 2011-06-01 | 哈尔滨工业大学 | RS485 dual-bus communication method used for test satellite |
| CN104065545A (en) * | 2014-06-27 | 2014-09-24 | 浙江大学 | RS485 bus communication method based on Modbus protocol and power electronic system based on the communication method |
| CN105122229A (en) * | 2013-03-13 | 2015-12-02 | 阿提瓦公司 | Fault-tolerant loop for a communication bus |
| CN106209543A (en) * | 2016-07-14 | 2016-12-07 | 珠海优特电力科技股份有限公司 | Bidirectional bus communication circuit and communication method |
| CN108959142A (en) * | 2017-05-18 | 2018-12-07 | 欧姆龙(上海)有限公司 | Bus communication, device and system |
| CN109808544A (en) * | 2019-01-30 | 2019-05-28 | 国能新能源汽车有限责任公司 | Cell management system of electric automobile is with mostly from the address code system of control and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017046250A (en) * | 2015-08-28 | 2017-03-02 | 沖電気工業株式会社 | Master device, slave device, and communication system |
| CN109421032B (en) * | 2017-08-28 | 2023-12-22 | 创科电动工具科技有限公司 | Power tool system and method of operating the same |
-
2019
- 2019-07-24 CN CN201910672371.7A patent/CN110300042B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025632A (en) * | 2007-03-23 | 2007-08-29 | 南京航空航天大学 | Track type conveyor control device |
| CN101571840A (en) * | 2009-06-05 | 2009-11-04 | 四川长虹电器股份有限公司 | Two-line unclocked data interaction method |
| CN102081585A (en) * | 2010-12-30 | 2011-06-01 | 哈尔滨工业大学 | RS485 dual-bus communication method used for test satellite |
| CN105122229A (en) * | 2013-03-13 | 2015-12-02 | 阿提瓦公司 | Fault-tolerant loop for a communication bus |
| CN104065545A (en) * | 2014-06-27 | 2014-09-24 | 浙江大学 | RS485 bus communication method based on Modbus protocol and power electronic system based on the communication method |
| CN106209543A (en) * | 2016-07-14 | 2016-12-07 | 珠海优特电力科技股份有限公司 | Bidirectional bus communication circuit and communication method |
| CN108959142A (en) * | 2017-05-18 | 2018-12-07 | 欧姆龙(上海)有限公司 | Bus communication, device and system |
| CN109808544A (en) * | 2019-01-30 | 2019-05-28 | 国能新能源汽车有限责任公司 | Cell management system of electric automobile is with mostly from the address code system of control and method |
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