CN113740748B - Battery detection method based on CAN bus sending message - Google Patents
Battery detection method based on CAN bus sending message Download PDFInfo
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- CN113740748B CN113740748B CN202111033731.2A CN202111033731A CN113740748B CN 113740748 B CN113740748 B CN 113740748B CN 202111033731 A CN202111033731 A CN 202111033731A CN 113740748 B CN113740748 B CN 113740748B
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 144
- 125000004122 cyclic group Chemical group 0.000 claims description 24
- 241001522296 Erithacus rubecula Species 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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]
- H04L12/40—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 battery detection method based on CAN bus sending message, which comprises the steps of clicking CAN message editing software on a battery detection system, entering CAN message editing, executing CAN message sending flow, flexibly sending CAN message by utilizing customized set parameters, judging according to the condition of ending sending CAN message, stopping CAN message sending when any condition is met, otherwise, continuing sending CAN message, executing stopping CAN message sending, and ending the flow, wherein the method has the beneficial effects that: the battery CAN be used for transmitting the CAN message at any time through the battery detection equipment in the experimental stage, observing the state and the performance of the battery, facilitating a user to rapidly verify the BMS battery management system, being unnecessary to bind with a process flow test scheme, being capable of transmitting CAN binary data at any time, being mainly applied to the battery detection field and being also capable of being used as a small tool for communication between the battery detection equipment and the battery BMS.
Description
[ Field of technology ]
The invention relates to the technical field of battery detection, in particular to a battery detection method based on a CAN bus sending message.
[ Background Art ]
CAN (Controller Area Network), a serial communication protocol bus for real-time applications, which can use twisted pair wires to transmit signals, is one of the most widely used fieldbuses in the world. CAN is a de facto standard in the field of battery detection technology, and despite some problems (e.g. slow speed, short messages), is still the core network for all battery detection.
With the continuous development of new energy power batteries, the capacity, safety and cruising ability of the batteries are becoming important points. In order to intelligently manage and maintain each battery cell, prevent the battery from being overcharged and overdischarged, prolong the service life of the battery, and monitor the state of the battery, the power battery is basically equipped with a BMS battery management system. And each manufacturer has inconsistent requirements on BMS technical protocols, and has various communication modes, but the traditional battery detection system does not have the function of real-time communication with the BMS, and can only charge and discharge according to the process steps or the test schemes set by users. In the experimental stage, some batteries need to send CAN message instructions for activation before charging and discharging, and some batteries need to send instructions in the charging and discharging process. Aiming at different batteries, the message sending mode needs to be continuously adjusted, different instructions need to be sent at different stages, and the requirement on the sending instantaneity is high.
[ Invention ]
The invention aims to solve the technical problems, and provides a novel battery detection method based on a CAN bus sending message.
The invention is realized by the following technical scheme:
a battery detection method based on CAN bus sending message comprises the following steps:
s1: CAN message editing software is arranged on the battery detection system;
S2: clicking CAN message editing software to enter CAN message editing, wherein the CAN message editing respectively sets parameters such as a CAN interface, a cycle type, an adjacent frame interval, a packet transmission mode, packet transmission times, names, data, a transmission mode, transmission times, intervals, data increment, byte sequence, starting bytes, byte length, increment step length, increment upper limit and the like, and selects a message to be transmitted, then clicking and determining the message, instantly completing all customized parameters, and automatically generating a required derivative value set for all customized parameters;
S3: executing a CAN message sending flow after the CAN message is edited in the step S2, and flexibly sending the CAN message by utilizing the customized and set parameters;
S4: judging according to the condition of finishing transmitting the CAN message, and stopping transmitting if the packet transmission mode is the transmission times and the whole packet reaches the transmission times; if the packet cyclic packet transmission mode is cyclic transmission, the packet is always transmitted until the manual operation clicks to stop transmission; if the frame cycle transmission mode is the transmission times, stopping transmitting when the message reaches the transmission times, and ending CAN message transmission when all the messages are transmitted; if the frame cycle transmission mode is cycle transmission, the frame is transmitted all the time until manual operation clicks to stop transmission, and the transmission of the CAN message is stopped when any one condition is met, otherwise, the CAN message is continuously transmitted;
s5: and (4) stopping the execution in the step (S4) from sending the CAN message, and ending the flow.
Further, the method for sending the CAN message comprises a packet cyclic sending method and a frame cyclic sending method.
Further, in the step S4, the conditions for judging that the sending of the CAN packet is finished include a packet cycle and a frame cycle, where the packet cycle is as follows: if the packet transmission mode is the transmission times, ending the whole packet when the transmission times are reached; if the packet transmission mode is cyclic transmission, the packet is transmitted until the manual operation clicks to stop transmission;
The frame cycle: if the transmission mode is the transmission times, ending the transmission times when the message reaches the transmission times, and ending the CAN message transmission when all the messages are transmitted; if the transmission mode is the cyclic transmission, the transmission is always performed until the manual operation click stops the transmission.
Further, the packet cycle transmission mode flow is as follows: all the sent messages are taken as a packet, and are treated as a whole, first, a first frame message in the packet is sent to a BMS battery management system through CAN communication, and the time between adjacent frames is waited; sending Bao Nadi two frames of messages, and waiting for the interval time of adjacent frames; and the method is analogically performed until the last frame of message in the packet is sent, waiting for the maximum millisecond between the adjacent frame interval and the packet interval, and starting the next round of packet data transmission.
Further, the frame cycle transmission mode flow is as follows: when the messages are transmitted for the first time, the transmission time of all the messages is the same, the priority is arranged, the messages are selected to be transmitted, the first to N frames of messages are sequentially judged, the frame of message Y which is longest from the last transmission time and satisfies the requirement of being greater than or equal to the interval millisecond of the messages is found, namely the Y frame of message is transmitted to a BMS battery management system through CAN communication, and after the transmission is completed, the adjacent frames are waited for the interval millisecond; and selecting a message to be sent from the arrangement priority, and starting to continue the round robin judgment and sending.
Further, the data content of each frame of message transmitted next is a message increment sub-flow.
Further, the message increment sub-process comprises the following steps:
① Sending an initial message;
② The message is increased, and the designated byte is increased in step length according to the byte sequence;
③ Judging whether the specified byte data is greater than or equal to the increment upper limit, if not, continuing the ② th step;
④ And (5) increasing the upper limit message transmission.
The invention has the beneficial effects that:
(1) The battery detection method based on the CAN bus for sending the message is simple to operate, has strong practicability and CAN save a large amount of labor cost;
(2) The invention solves the problem that the battery CAN send CAN message at any time through the battery detection equipment in the experimental stage, and observes the state and performance of the battery, thereby facilitating the user to rapidly verify the BMS battery management system;
(3) The invention can also explore a mature test scheme, explore how many times different batteries send corresponding messages in different stages, and can lead the battery performance to reach an optimum, thereby greatly shortening the user verification time and facilitating the later mass production of users;
(4) The invention has strong autonomy, does not need to be bound with a process flow test scheme, and CAN send CAN binary data at any time;
(5) The invention is mainly applied to the field of battery detection, and can also be used as a small tool for communication between battery detection equipment and a battery BMS.
[ Description of the drawings ]
FIG. 1 is a flow chart of a battery detection method based on a CAN bus transmission message;
FIG. 2 is a flow chart of a frame cycle transmission method according to the present invention;
FIG. 3 is a flow chart of a packet cycle transmission method according to the present invention;
FIG. 4 is a schematic diagram of a message increment sub-flow according to the present invention.
[ Detailed description ] of the invention
The invention is further described with reference to the accompanying drawings and detailed description below:
example 1: as shown in fig. 1, a battery detection method based on a CAN bus sending message includes the following steps:
s1: CAN message editing software is arranged on the battery detection system;
S2: clicking CAN message editing software to enter CAN message editing, wherein the CAN message editing respectively sets parameters such as a CAN interface, a cycle type, an adjacent frame interval, a packet transmission mode, packet transmission times, names, data, a transmission mode, transmission times, intervals, data increment, byte sequence, starting bytes, byte length, increment step length, increment upper limit and the like, and selects a message to be transmitted, then clicking and determining the message, instantly completing all customized parameters, and automatically generating a required derivative value set for all customized parameters;
The packet transmission mode is as follows: the cycle type selection packet is effective when cycled, consisting essentially of multiple transmissions and cycled transmissions. When multiple times of transmission are selected, the packet transmission is finished after the designated times of transmission; when the cyclic transmission is selected, the packet is always transmitted in a cyclic manner;
The transmission mode is as follows: when a frame cycle is selected in a cyclic manner, the frame cycle is effective and mainly consists of multiple transmissions and cyclic transmissions. When multiple transmissions are selected, the message transmission is finished after the designated times of message transmission; when the cyclic transmission is selected, the message is always circularly transmitted;
the number of transmissions: when the transmission mode selects multiple transmissions, the method is effective, and the number of times of message transmission is reduced;
the interval is as follows: the time interval between the next transmission of the present frame and the present frame;
the data is incremented: if the two conditions are not, the selection is effective, otherwise, the selection is not effective;
The byte order: the method for representing the message data storage mainly comprises Intel and Motorola, wherein the lower level of Intel is in a low byte, and the higher level is in a high byte; motorola low level is in high byte and high level is in low byte;
The start byte: incrementing the starting byte position of the data, ranging from 0-7, and canfd from 0-63;
The byte length: incremental data length 1-8, canfd 1-64;
the increment step size: the size of each increment;
the upper increment limit: the maximum value of the incremental data, namely the maximum value can only be increased to the value;
S3: executing a CAN message sending flow after the CAN message is edited in the step S2, and flexibly sending the CAN message by utilizing the customized and set parameters;
S4: judging according to the condition of ending the sending of the CAN message, and ending the whole packet if the packet transmission mode is the sending times and the whole packet reaches the sending times; if the packet cyclic packet transmission mode is cyclic transmission, the packet is always transmitted until the manual operation clicks to stop transmission; if the frame cycle transmission mode is the transmission times, stopping transmitting when the message reaches the transmission times, and ending CAN message transmission when all the messages are transmitted; if the frame cyclic transmission mode is cyclic transmission, the frame is transmitted until the manual operation click stops transmitting; stopping sending the CAN message when any condition is met, otherwise, continuing to send the CAN message;
s5: and (4) stopping the execution in the step (S4) from sending the CAN message, and ending the flow.
Embodiment 2 is as shown in fig. 2 and 3, and the CAN packet transmission method includes a packet cycle transmission method and a frame cycle transmission method.
Preferably, the conditions for judging in step S4 that the sending of the CAN packet is finished include a packet cycle and a frame cycle, where the packet cycle is as follows: if the packet transmission mode is the transmission times, ending the whole packet when the transmission times are reached; if the packet cyclic packet transmission mode is cyclic transmission, the packet is always transmitted until the manual operation clicks to stop transmission;
The frame cycle: if the transmission mode is the transmission times, ending the transmission times when the message reaches the transmission times, and ending the CAN message transmission when all the messages are transmitted; if the transmission mode is the cyclic transmission, the transmission is always performed until the manual operation click stops the transmission.
Preferably, the packet cycle transmission mode is as follows: all the sent messages are taken as a packet, and are treated as a whole, first, a first frame message in the packet is sent to a BMS battery management system through CAN communication, and the time between adjacent frames is waited; sending Bao Nadi two frames of messages, and waiting for the interval time of adjacent frames; and the method is analogically performed until the last frame of message in the packet is sent, waiting for the maximum millisecond between the adjacent frame interval and the packet interval, and starting the next round of packet data transmission.
Preferably, the frame cycle transmission mode flow is as follows: when the messages are transmitted for the first time, the transmission time of all the messages is the same, the priority is arranged, the messages are selected to be transmitted, the first to N frames of messages are sequentially judged, the frame of message Y which is longest from the last transmission time and satisfies the requirement of being greater than or equal to the interval millisecond of the messages is found, namely the Y frame of message is transmitted to a BMS battery management system through CAN communication, and after the transmission is completed, the adjacent frames are waited for the interval millisecond; and selecting a message to be sent from the arrangement priority, and starting to continue the round robin judgment and sending.
Preferably, the data content of the next transmission of each frame of message is a message increment sub-flow.
Embodiment 3 is shown in fig. 4, and the message increment sub-flow includes the following steps:
① Sending an initial message;
② The message is increased, and the designated byte is increased in step length according to the byte sequence;
③ Judging whether the specified byte data is greater than or equal to the increment upper limit, if not, continuing the ② th step;
④ And (5) increasing the upper limit message transmission.
Modifications and variations of the above embodiments will be apparent to those skilled in the art in light of the above teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (4)
1. The battery detection method based on the CAN bus sending message is characterized by comprising the following steps:
s1: CAN message editing software is arranged on the battery detection system;
S2: clicking CAN message editing software, entering CAN message editing, wherein the CAN message editing respectively sets and selects messages to be transmitted for a CAN interface, a cycle type, an adjacent frame interval, a packet transmission mode, packet transmission times, names, data, a transmission mode, transmission times, intervals, data increment, byte sequence, starting bytes, byte length, increment step length and increment upper limit parameters, clicking and determining, instantly completing all customization parameters, and automatically generating a required derivative value set for all customization parameters;
S3: executing a CAN message sending flow after the CAN message is edited in the step S2, and flexibly sending the CAN message by utilizing the customized and set parameters;
S4: judging according to the condition of finishing transmitting the CAN message, and stopping transmitting if the packet transmission mode is the transmission times and the whole packet reaches the transmission times; if the packet cyclic packet transmission mode is cyclic transmission, the packet is always transmitted until the manual operation clicks to stop transmission; if the frame cycle transmission mode is the transmission times, stopping transmitting when the message reaches the transmission times, and ending CAN message transmission when all the messages are transmitted; if the frame cycle transmission mode is cycle transmission, the frame is transmitted all the time until manual operation clicks to stop transmission, and the transmission of the CAN message is stopped when any one condition is met, otherwise, the CAN message is continuously transmitted; the CAN message sending mode comprises a packet cyclic sending mode and a frame cyclic sending mode; the packet cycle sending mode flow is as follows: all the sent messages are taken as a packet, and are treated as a whole, first, a first frame message in the packet is sent to a BMS battery management system through CAN communication, and the time between adjacent frames is waited; sending Bao Nadi two frames of messages, and waiting for the interval time of adjacent frames; and so on until the last frame of message in the packet is sent, waiting for the maximum millisecond between the adjacent frame interval and the packet interval, and starting the next round of packet data transmission; the frame cycle transmission mode flow is as follows: when the messages are transmitted for the first time, the transmission time of all the messages is the same, the priority is arranged, the messages are selected to be transmitted, the first to N frames of messages are sequentially judged, the frame of message Y which is longest from the last transmission time and satisfies the requirement of being greater than or equal to the interval millisecond of the messages is found, namely the Y frame of message is transmitted to a BMS battery management system through CAN communication, and after the transmission is completed, the adjacent frames are waited for the interval millisecond; selecting a message to be sent from the arrangement priority, and starting to continue the round robin judgment and sending;
s5: and (4) stopping the execution in the step (S4) from sending the CAN message, and ending the flow.
2. The battery detection method based on the CAN bus transmission message according to claim 1, wherein: in the step S4, the conditions for judging that the sending of the CAN message is finished include packet cycle and frame cycle, where the packet cycle is as follows: if the packet transmission mode is the transmission times, ending the whole packet when the transmission times are reached; if the packet transmission mode is cyclic transmission, the packet is transmitted until the manual operation clicks to stop transmission; the frame cycle: if the transmission mode is the transmission times, ending the transmission times when the message reaches the transmission times, and ending the CAN message transmission when all the messages are transmitted; if the transmission mode is the cyclic transmission, the transmission is always performed until the manual operation click stops the transmission.
3. The battery detection method based on the CAN bus transmission message according to claim 1, wherein: the data content of each frame of message transmitted next time is a message increment sub-flow.
4. The battery detection method based on the CAN bus transmission message according to claim 3, wherein: the message increment sub-process comprises the following steps:
① Sending an initial message;
② The message is increased, and the designated byte is increased in step length according to the byte sequence;
③ Judging whether the specified byte data is greater than or equal to the increment upper limit, if not, continuing the ② th step;
④ And (5) increasing the upper limit message transmission.
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