CN108337143A - Communication structure, communication system and communication means - Google Patents
Communication structure, communication system and communication means Download PDFInfo
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- CN108337143A CN108337143A CN201810111417.3A CN201810111417A CN108337143A CN 108337143 A CN108337143 A CN 108337143A CN 201810111417 A CN201810111417 A CN 201810111417A CN 108337143 A CN108337143 A CN 108337143A
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- 238000004891 communication Methods 0.000 title claims abstract description 273
- 238000003466 welding Methods 0.000 claims abstract description 12
- 230000008054 signal transmission Effects 0.000 claims description 32
- 241000723353 Chrysanthemum Species 0.000 claims description 11
- 235000005633 Chrysanthemum balsamita Nutrition 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 235000007516 Chrysanthemum Nutrition 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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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
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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]
- H04L12/44—Star or tree 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
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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Abstract
The invention discloses a kind of communication structure, communication system and communication means.Wherein, communication structure include main control unit, multiple Correspond Nodes respectively from control unit and CAN bus；Wherein, main control unit includes microcontroller, CAN transceiver, the first functional chip；Include the second functional chip from control unit, and reserves the position of welding CAN transceiver and microcontroller；Wherein the first functional chip and the second functional chip support daisy chain topology；Communication mode between main control unit and each unit from control is suitable for switching between being communicated using daisy chain topology or being communicated using CAN bus according to demand.The technical program provides a kind of communication structure that flexibility can flexibly switch between two kinds of communication modes.
Description
Technical field
The present invention relates to Communication topology and communication protocol techniques field more particularly to a kind of communication structure, communication systems
System and communication means.
Background technology
Daisy chain (Daisy-Chain) communication at present is a common more equipment connecting communication topological structures.
Existing a kind of schematic diagram of daisy chain connection structure as shown in Fig. 1.In Fig. 1, by microcontroller to branch
The functional chip for holding daisy chain sends out instruction, which is passed downwards by daisy chain topology in the form of a signal
It passs.In practical applications, microcontroller can be by communicating with two line of isolating chip of the functional chip pairing of daisy chain is supported
Signal RDTX+ and RDTX- transmit downwards signal.The information and instruction daisy chain structure in this way that microcontroller is sent are from the 1st
A node transmits downwards, until to the last 1 node receives instruction.
For example, in battery management system (Battery Management System, BMS), daisy chain in this way
(Daisy-Chain) BMU in structure BMS (Battery Management Unit, battery management unit) may be implemented simultaneously
Instruction is sent (for example, voltage measurement and reading to all monomer administrative units (Cell Management Unit, CMU) node
Voltage), some node can also be sent and be instructed, which is individually operated.Such daisy chain (Daisy-
Chain) network topology structure is at low cost, and can realize multiple node communications simultaneously, be in vehicle electric field one very
Common topological structure, many chips all support daisy chain (Daisy-Chain) structure.
Existing common chrysanthemum chain structure connects adjacent node often through the mode that twisted-pair feeder is connected, and constitutes one
A long " queue " structure, such structure are exactly transmitted through from first node and carry out signal and pass through chrysanthemum there are one distinct disadvantage
Pattern chain (Daisy-Chain) is transmitted to next node, can there is certain signal decaying, and such signal continues to next biography
After passing, the phenomenon that decaying, can be more and more obvious, the last one node receive signal necessarily decay it is the most serious, due to this
The maximum node number that reason daisy chain structure can be supported is often relatively low, and according to actual demand to generally require comparison more by BMS
CMU number of nodes, therefore the structure of such a daisy chain tends not to be applied directly to BMS due to the characteristic that its signal is decayed
In, it to solve the problems, such as this, the characteristic for the decaying of daisy chain signal is needed to be improved.
Invention content
The present invention addresses the above problem, provides a kind of communication structure, including：Main control unit multiple corresponds to respectively
Communication node from control unit and CAN bus；Wherein,
The main control unit includes：Microcontroller, CAN transceiver, the first functional chip；
It is described to include from control unit：Second functional chip, and the position of reserved welding CAN transceiver and microcontroller；Wherein,
First functional chip and the second functional chip support daisy chain topology；
Communication mode between the main control unit and each unit from control is suitable for according to demand using daisy topology
Structure carry out communication or CAN bus communicated between switch.
Optionally, it is described be suitable for according to demand using daisy chain topology carry out communication or CAN bus communicated
Between switching include：
Whether the communication mode between the main control unit and each unit from control is decayed by the signal of each communication node
It is determined within the scope of signal transmission accuracy requirement；
If the signal of communication node is decayed within the scope of signal transmission accuracy requirement, the main control unit and the communication section
Point is corresponding to be communicated from control unit using daisy chain topology；If the signal decaying of communication node is accurate beyond signal transmission
True property claimed range, the main control unit is corresponding with the communication node to be communicated from control unit using CAN bus.
Optionally, the main control unit further include the first transformer, each from control unit further include the second transformer and connect
Plug-in unit；It is each described from having channel selection switch between the second transformer and connector of control unit；Wherein, the connector
It is the connector for the interface duplex of the interface and CAN bus of daisy chain topology；
It, should be from leading in control unit if the main control unit is communicated with from control unit using daisy chain topology
Road selecting switch is closed,
It, should be from the channel selecting in control unit if the main control unit is communicated with from control unit using CAN bus
Switch disconnects, and the upper CAN transceiver of welding and list on the position for reserving welding CAN transceiver and microcontroller from controlling unit
Piece machine.
Optionally, if communication node signal decaying exceed signal transmission accuracy requirement range, the main control unit with
The communication node it is corresponding from control unit communicated using CAN bus in the case of, if the communication node is to first appear letter
Number decaying exceeds signal transmission accuracy requirement range, and next communication node of the communication node is compared to the communication node
Signal decay within the scope of signal transmission accuracy requirement, then the communication node is corresponding from control unit and the communication node
Next communication node is corresponding to be communicated from control unit using daisy chain topology.
Optionally, next communication node of the communication node it is corresponding from control unit and the main control unit between be by
First appear signal decaying the communication node it is corresponding from control unit communicated using CAN bus.
Optionally, if signal decaying of the next communication node of the communication node compared to the communication node exceeds signal
Accuracy requirement range is transmitted, then next communication node of the communication node is corresponding adopts between control unit and main control unit
It is communicated with CAN bus.
Optionally, if communication node signal decaying exceed signal transmission accuracy requirement range, the main control unit with
The communication node it is corresponding from control unit communicated using CAN bus in the case of；Follow-up each communication of the communication node
Node it is corresponding from control unit and main control unit between communication mode be suitable for according to demand using daisy chain topology into
Row communication or CAN bus switch between being communicated.
Optionally, the main control unit be battery management unit, it is described from control unit be monomer administrative unit.
The embodiment of the present invention additionally provides a kind of communication system, including above-mentioned communication structure.
The embodiment of the present invention additionally provides a kind of communication means, which is based on above-mentioned communication structure, the communication
Method includes the following steps：
Determine the communication mode between the main control unit and each unit from control using daisy topology according to demand
Structure carry out communication or CAN bus communicated between switch.
Compared with prior art, technical solution of the present invention at least has the advantages that：
In communication structure provided in an embodiment of the present invention, main control unit includes microcontroller, CAN transceiver and support chrysanthemum
The functional chip of chain topological structure；And each communication node it is corresponding from control unit include support daisy chain topology
Functional chip, and reserved the position of welding CAN transceiver and microcontroller.This ensure that main control unit with from control unit it
Between using CAN bus communication or daisy chain topology communicate both communication modes and can be realized with circuit kit plate, no
The two different circuit boards of additional designs are needed, to save hardware cost, are needed through CAN bus and master control when from control unit
When unit communication, then microcontroller and CAN transceiver be welded in circuit.
Main control unit and from control unit in be equipped with transformer (communication when play buffer action) and each from control unit
In transformer and connector between be additionally provided with channel selection switch, (disconnected by the switching of the state of control channel selecting switch
Or be closed) to realize that main control unit carries out signal transmission from between control unit using different communication modes so that CAN bus
Switching between communication or daisy chain topology communication is more flexible.Further, CAN interface and daisy chain communication interface
(interface of each node of daisy chain topology) is multiplexing connector, switches CAN interface by channel selection switch
With daisy chain communication interface.
Above-described embodiment uses CAN bus communication mode using 1 daisy chain topology and remaining communication node
Come realize master control and from control unit between communication.But since daisy chain topology is at low cost, will can also remain again
Remaining communication node forms the 2nd daisy chain topology, and the communication of all communication nodes in daisy chain topology by
With microcontroller and CAN transceiver from control unit (it is corresponding from control unit to first appear the communication node that signal is decayed)
To complete, and all sampling data transmittings are given to main control unit by CAN bus communication mode, to make communication structure become chrysanthemum
The structure of pattern chain topological structure and CAN bus communication staggeredly, is further reduced communication system cost.
Description of the drawings
Fig. 1 is a kind of schematic diagram of existing daisy chain connection structure；
Fig. 2 is a kind of schematic diagram of the specific embodiment of communication structure of the embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of another specific embodiment of communication structure of the embodiment of the present invention.
Specific implementation mode
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.
As shown in Fig. 2 the schematic diagram of a kind of communication structure of the embodiment of the present invention.
With reference to figure 2, the communication structure include main control unit 11, respectively Correspond Node from control unit (in such as figure
Shown in from control unit 21,22 ..., 2N, 2N+1,2N+2) and CAN bus 31.
Specifically, the main control unit 11 includes microcontroller 111, CAN transceiver 112, the first functional chip 113 and the
One transformer 114.First transformer 114 plays buffer action in communication.Correspond Node it is each from control unit
(such as from control unit 21) includes the second functional chip 211 and the second transformer 212, and reserved welding CAN transceiver and monolithic
The position of machine.Wherein, first functional chip, 113 and second functional chip 211 supports daisy chain topology.
Main control unit 11 sends acquisition instructions to the first functional chip by microcontroller 111 and (such as acquires battery voltage
The instruction of data).The acquisition instructions in the form of a signal by daisy chain topology from first communication node (it is corresponding from
Control unit 21) it transmits down.
Unlike the prior art, the communication mode between the main control unit and each unit from control is suitable for existing according to demand
Using daisy chain topology carry out communication or CAN bus communicated between switch.And in each unit from control, CAN
Bus interface and daisy chain communication interface (interface of each node of daisy chain topology) are the same connectors of multiplexing, are passed through
Channel selection switch switches CAN interface and daisy chain communication interface.
In a preferred embodiment, it can be determined how in difference according to the signal attenuation of each communication node
Communication mode between switch.
Specifically, if the signal of the communication node is decayed within the scope of signal transmission accuracy requirement, the main control unit
11 it is corresponding with the communication node from control unit communicated using daisy chain topology；If the signal decaying of communication node is super
Go out signal transmission accuracy requirement range, the main control unit 11 is corresponding with the communication node to use CAN bus from control unit
It is communicated.
Each from having channel selection switch between the second transformer and connector of control unit, selected by control channel
Closure/disconnection of switch can flexibly switch main control unit and from the communication mode between control unit, wherein the connector is
The connector of the interface duplex of interface and CAN bus for daisy chain topology.
It specifically, should be from control if the main control unit 11 is communicated with from control unit using daisy chain topology
Channel selection switch in unit is closed, and two interfaces of connector are daisy chain communication interface, ensures that signal is communicated from upper one
Node flows into, and next communication node is flowed out to after itself is handled.
It, should be from the channel in control unit if the main control unit 11 is communicated with from control unit using CAN bus 31
Selecting switch disconnects, and the upper CAN transceiver of welding on the position for reserving welding CAN transceiver and microcontroller from controlling unit
And microcontroller.In this case, signal acquisition is controlled from control unit by microcontroller, connector inputted daisy chain signal originally
Two interfaces, because of the switching of channel selection switch, the two interfaces of connector export CANH and CANL signals at this time, acquisition
Data value the main control unit 11 is passed to by CAN bus.
In practical applications, however it is not limited to be determined how different according to the signal attenuation of each communication node
Switch between communication mode.User flexibly can switch daisy chain using communication structure provided by the invention according to different needs
Topological structure communicates or CAN bus communication.
In communication structure as shown in Figure 2, the daisy chain topology of N number of communication node and the CAN of remaining communication node
Bus structures, the decaying of signal is all within the scope of accuracy requirement in N number of communication node.The value of N is often in different situations
Have difference because different function chip influences difference caused by signal processing, different length, material, structure daisy chain
The accuracy requirement of communication line, functional chips also different for signal influence of fading and different is also different, these all can
Large effect is generated to communicating requirement.
In other embodiments, if the signal decaying of communication node exceeds signal transmission accuracy requirement range, institute for the first time
State main control unit it is corresponding with the communication node from control unit communicated using CAN bus in the case of；The communication node
The follow-up corresponding communication mode between control unit and main control unit of each communication node can also be according to demand using chrysanthemum
Pattern chain topological structure communicate or switches between using CAN bus to be communicated.
Since daisy chain topology is at low cost, exceed signal transmission accuracy for first appearing signal decaying
Follow-up each communication node of the communication node of claimed range, if next communication node of the communication node is compared to the communication
The signal of node is decayed within the scope of signal transmission accuracy requirement, then the communication node is corresponding from control unit and the communication section
Next communication node of point is corresponding to be communicated from control unit using daisy chain topology.That is, can also be again
It is secondary that subsequent communication node is formed into the 2nd daisy chain topology.
But if the communication node (first appears communication section of the signal decaying beyond signal transmission accuracy requirement range
Point) next communication node compared to the communication node signal decaying exceed signal transmission accuracy requirement range, then should
Next communication node of communication node is corresponding to be communicated between control unit and main control unit using CAN bus.
As shown in Fig. 3 the schematic diagram of the another specific embodiment of a kind of communication structure of the embodiment of the present invention.With reference to
Difference lies in pass through daisy topology from control unit 2N+1 and between control unit 2N+2 for communication structure and Fig. 2 shown in Fig. 3
Structure is communicated, that is to say, that constitutes the 2nd daisy chain topology from control unit 2N+1 and from control unit 2N+2, this two
A communication between control unit and main control unit 11 be by with microcontroller and CAN transceiver from control unit (i.e. singly from control
First 2N+1) it completes, by CAN bus communication mode it should give all sampling data transmittings to main control unit from control unit 2N+1
11, to make communication structure become the structure of daisy chain topology and CAN bus communication staggeredly, it is further reduced communication system
Cost.Communication structure shown in Fig. 3 is only a specific example, in practical applications, subsequent to be formed from control unit
One or more daisy chain topologies.
Therefore, entire communication structure just by original 1 daisy chain topology and several with microcontroller from control
The corresponding communication node of unit become 2 daisy chain topologies with several with microcontroller from the corresponding communication of control unit
Node is constituted.In this manner, can continue to continue remaining from the corresponding communication node of control unit with microcontroller
More daisy chain topologies are split out, so that communication structure reforms into daisy chain topology and CAN bus communication
Structure staggeredly is further reduced the cost of system.
For proposed in background technology existing battery management system there are the problem of, above-mentioned Fig. 2 and shown in Fig. 3 hair
Bright embodiment can be applied in battery management system, existing to reduce the signal of communication decaying generated using daisy chain topology
As.Therefore, in above-described embodiment, the main control unit be battery management unit (BMU, Battery Management Unit),
It is described from control unit be monomer administrative unit (CMU, Cell Management Unit).In practical applications, the present invention is implemented
The communication structure that example provides can also be applied in other communication systems, and details are not described herein.
Based on above-mentioned communication structure, the embodiment of the present invention additionally provides a kind of communication means, includes the following steps：According to need
Ask determine communication mode between the main control unit and each unit from control being communicated using daisy chain topology or
CAN bus switches between being communicated.
In a preferred embodiment, the step：According to demand determine the main control unit with it is each from control unit it
Between communication mode using daisy chain topology carry out communication or CAN bus communicated between switching include：
Step S1：Determine that the signal of communication node is decayed whether within the scope of signal transmission accuracy requirement；
Step S2：It is carried out from control unit using daisy chain topology if so, main control unit is corresponding with the communication node
Communication；It is communicated from control unit using CAN bus if it is not, main control unit is corresponding with the communication node.
Further, if communication node signal decaying exceed signal transmission accuracy requirement range, the main control unit with
The communication node it is corresponding from control unit communicated using CAN bus in the case of, follow-up each communication of the communication node
Node it is corresponding from control unit and main control unit between communication mode be suitable for according to demand using daisy chain topology into
Row communication or CAN bus switch between being communicated.
In a preferred embodiment, if the communication node is to first appear signal decaying to want beyond signal transmission accuracy
Range is sought, and next communication node of the communication node is decayed compared to the signal of the communication node in signal transmission accuracy
In claimed range, then the communication node is corresponding corresponding with next communication node of the communication node single from control from control unit
Member is communicated using daisy chain topology.Next communication node of the communication node is corresponding from control unit and the master
It is that the communication node of signal decaying is corresponding to be communicated from control unit using CAN bus by first appearing between control unit.
The specific implementation process of the communication means can refer to the embodiment of above-mentioned communication structure, and details are not described herein.
In conclusion using the technical program, the main control unit of communication structure includes microcontroller, CAN transceiver and branch
Hold the functional chip of daisy chain topology；And each communication node it is corresponding from control unit include support daisy topology
The functional chip of structure, and reserved the position of welding CAN transceiver and microcontroller.This ensure that main control unit with from control
Communicating both communication modes using CAN bus communication or daisy chain topology between unit can be with circuit kit plate come real
It is existing, the two different circuit boards of additional designs are not needed, to save hardware cost, need to pass through CAN bus when from control unit
When being communicated with main control unit, then microcontroller and CAN transceiver be welded in circuit.
Main control unit and from control unit in be equipped with transformer (communication when play buffer action) and each from control unit
In transformer and connector between be additionally provided with channel selection switch, (disconnected by the switching of the state of control channel selecting switch
Or be closed) to realize that main control unit carries out signal transmission from between control unit using different communication modes so that CAN bus
Switching between communication or daisy chain topology communication is more flexible.Further, CAN interface and daisy chain communication interface
(interface of each node of daisy chain topology) is multiplexing connector, switches CAN interface by channel selection switch
With daisy chain communication interface.
Above-described embodiment uses CAN bus communication mode using 1 daisy chain topology and remaining communication node
Come realize master control and from control unit between communication.But since daisy chain topology is at low cost, will can also remain again
Remaining communication node forms the 2nd daisy chain topology, and the communication of all communication nodes in daisy chain topology by
With microcontroller and CAN transceiver from control unit (it is corresponding from control unit to first appear the communication node that signal is decayed)
To complete, and all sampling data transmittings are given to main control unit by CAN bus communication mode, to make communication structure become chrysanthemum
The structure of pattern chain topological structure and CAN bus communication staggeredly, is further reduced communication system cost.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, and according to the present invention
Technical spirit to any simple modifications, equivalents, and modifications made by above example, belong to technical solution of the present invention
Protection domain.
Claims (15)
1. a kind of communication structure, which is characterized in that including：Main control unit, it is multiple respectively Correspond Node from control unit with
And CAN bus；Wherein,
The main control unit includes：Microcontroller, CAN transceiver, the first functional chip；
It is described to include from control unit：Second functional chip, and the position of reserved welding CAN transceiver and microcontroller；Wherein, described
First functional chip and the second functional chip support daisy chain topology；
Communication mode between the main control unit and each unit from control is suitable for according to demand using daisy chain topology
Communicate or switches between using CAN bus to be communicated.
2. communication structure as described in claim 1, which is characterized in that described to be suitable for using daisy topology knot according to demand
Structure carry out communication or CAN bus communicated between switching include：
Whether the communication mode between the main control unit and each unit from control is being believed by the signal decaying of each communication node
It is determined within the scope of number transmission accuracy requirement；
If the signal of communication node is decayed within the scope of signal transmission accuracy requirement, the main control unit and the communication node pair
That answers is communicated from control unit using daisy chain topology；If the signal decaying of communication node exceeds signal transmission accuracy
Claimed range, the main control unit is corresponding with the communication node to be communicated from control unit using CAN bus.
3. communication structure as claimed in claim 2, which is characterized in that the main control unit further includes the first transformer, each
Further include the second transformer and connector from control unit；Have between the second transformer and connector of control unit described in each
Channel selection switch；Wherein, the connector is patched for the interface duplex of the interface and CAN bus of daisy chain topology
Part；
If the main control unit is communicated with from control unit using daisy chain topology, should be selected from the channel in control unit
Switch is selected to be closed,
It, should be from the channel selection switch in control unit if the main control unit is communicated with from control unit using CAN bus
It disconnects, and the upper CAN transceiver of welding and monolithic on the position for reserving welding CAN transceiver and microcontroller from controlling unit
Machine.
4. communication structure as claimed in claim 2, which is characterized in that if the signal decaying of communication node is accurate beyond signal transmission
True property claimed range, the main control unit are corresponding with the communication node from controlling the case where unit is communicated using CAN bus
Under；If the communication node is to first appear signal decaying to exceed signal transmission accuracy requirement range, and under the communication node
One communication node is decayed compared to the signal of the communication node within the scope of signal transmission accuracy requirement, then the communication node
It is corresponding from control unit it is corresponding with next communication node of the communication node from control unit use daisy chain topology into
Row communication.
5. communication structure as claimed in claim 4, which is characterized in that next communication node of the communication node it is corresponding from
It is that the communication node of signal decaying is corresponding to use CAN from control unit by first appearing between control unit and the main control unit
Bus is communicated.
6. communication structure as claimed in claim 4, which is characterized in that if next communication node of the communication node compared to
The signal decaying of the communication node exceeds signal transmission accuracy requirement range, then next communication node pair of the communication node
That answers is communicated between control unit and main control unit using CAN bus.
7. communication structure as claimed in claim 2, which is characterized in that if the signal decaying of communication node is accurate beyond signal transmission
True property claimed range, the main control unit are corresponding with the communication node from controlling the case where unit is communicated using CAN bus
Under；The corresponding communication mode between control unit and main control unit of follow-up each communication node of the communication node is suitable for basis
Demand is switched between being carried out communicating or being communicated using CAN bus using daisy chain topology.
8. communication structure as described in claim 1, which is characterized in that the main control unit be battery management unit, it is described from
Control unit is monomer administrative unit.
9. a kind of communication system, which is characterized in that the communication system includes as described in any item of the claim 1 to 8 logical
Believe structure.
10. communication system as claimed in claim 9, the communication system is battery management system.
11. a kind of communication means, which is characterized in that the communication means communicates knot based on any one as described in claim 1 to 8
Structure, the communication means include the following steps：
Determine the communication mode between the main control unit and each unit from control using daisy chain topology according to demand
Carry out communication or CAN bus communicated between switch.
12. communication means as claimed in claim 11, which is characterized in that it is described determine according to demand the main control unit with it is each
Communication mode between a unit from control switches between use daisy chain topology carries out communication or CAN bus is communicated
Including：
Determine that the signal of communication node is decayed whether within the scope of signal transmission accuracy requirement；
It is communicated from control unit using daisy chain topology if so, main control unit is corresponding with the communication node；If it is not, main
Control unit is corresponding with the communication node to be communicated from control unit using CAN bus.
13. communication means as claimed in claim 12, which is characterized in that if the signal decaying of communication node exceeds signal transmission
Accuracy requirement range, the main control unit feelings for using CAN bus to be communicated from control unit corresponding with the communication node
Under condition,
If the communication node is to first appear signal decaying to exceed signal transmission accuracy requirement range, and under the communication node
One communication node is decayed compared to the signal of the communication node within the scope of signal transmission accuracy requirement, then the communication node
It is corresponding from control unit it is corresponding with next communication node of the communication node from control unit use daisy chain topology into
Row communication.
14. communication means as claimed in claim 13, which is characterized in that next communication node of the communication node is corresponding
It is corresponding from control unit use by first appearing the communication node that signal is decayed from controlling between unit and the main control unit
CAN bus is communicated.
15. communication means as claimed in claim 12, which is characterized in that if the signal decaying of communication node exceeds signal transmission
Accuracy requirement range, the main control unit feelings for using CAN bus to be communicated from control unit corresponding with the communication node
Under condition, the corresponding communication mode between control unit and main control unit of follow-up each communication node of the communication node is suitable for root
Switch between use daisy chain topology carries out communication or CAN bus is communicated according to demand.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115037413A (en) * | 2022-05-25 | 2022-09-09 | 中国科学院国家空间科学中心 | SpaceFibre protocol-oriented standardized configurable multi-rate switching system and method |
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| CN108337143B (en) | 2024-03-01 |
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