CN113740748A - Battery detection method for sending message based on CAN bus - Google Patents
Battery detection method for sending message based on CAN bus Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 25
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
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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 message transmission, which comprises the following steps of clicking CAN message editing software through CAN message editing software on a battery detection system, entering CAN message editing, executing a CAN message transmission process, flexibly transmitting CAN messages by using customized set parameters, judging according to the CAN message transmission ending condition, stopping CAN message transmission when any one condition is met, and stopping CAN message transmission when the CAN message transmission is not continued, and ending the process when the CAN message transmission is stopped, wherein the beneficial effects of the invention are as follows: the battery CAN be used in the experimental stage, the CAN message CAN be sent at any time through the battery detection equipment, the state and the performance of the battery CAN be observed, the BMS battery management system CAN be conveniently and quickly verified by a user, the battery management system does not need to be bound with a process flow test scheme, CAN binary data CAN be sent at any time, the battery CAN be mainly applied to the field of battery detection, and the battery CAN also be used as a small tool for communicating the battery detection equipment with the battery BMS.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of battery detection, in particular to a battery detection method for sending messages based on a CAN bus.
[ background of the invention ]
Can (controller Area network), a serial communication protocol bus for real-time applications, which can transmit signals by twisted pair, is one of the most widely used field buses in the world. CAN, as a de facto standard in the field of battery test technology, is a core network for all battery tests, although there are some problems (e.g., slow speed, short messages).
With the continuous development of new energy power batteries, the capacity, safety and endurance of the batteries increasingly become important concerns. The power battery is basically equipped with a BMS battery management system for the purpose of intelligently managing and maintaining the respective battery cells, preventing overcharge and overdischarge of the battery, extending the lifespan of the battery, and monitoring the state of the battery. The requirements of each manufacturer on the BMS technical protocol are inconsistent, various communication modes exist, and the traditional battery detection system does not have the function of real-time communication with the BMS and can only carry out charging and discharging according to the process flow or the test scheme set by a user. In the experimental stage, some batteries need to send CAN message instructions for activation before charging and discharging, and other batteries need to send instructions in the charging and discharging process. For different batteries, the message sending mode needs to be adjusted continuously, different instructions need to be sent at different stages, and the requirement on sending real-time performance is higher.
[ summary of the invention ]
The invention aims to solve the technical problems and provides a novel battery detection method based on CAN bus message transmission.
The invention is realized by the following technical scheme:
a battery detection method based on CAN bus message sending comprises 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 parameters such as a CAN interface, a cycle type, an adjacent frame interval, a packet sending mode, packet sending times, a name, data, a sending mode, sending times, an interval, data increasing, a byte sequence, a starting byte, a byte length, an increasing step length, an increasing upper limit and the like, clicking to determine, instantly finishing all customized parameters, and automatically generating a required derivative value set for all customized parameters;
s3: executing a CAN message sending process after the CAN message editing is performed in the step S2, and flexibly sending the CAN message by using customized set parameters;
s4: judging according to the condition of finishing sending the CAN message, if the sending mode of the packet cycle packet is the sending times, and stopping sending the whole packet when the sending times are reached; if the packet circulating packet sending mode is circulating sending, the packet circulating packet is sent until manual operation clicks to stop sending; if the frame cycle transmission mode is the transmission times, stopping transmitting the message when the message reaches the transmission times, and when all the messages are transmitted, finishing transmitting the CAN message; if the frame cycle transmission mode is cycle transmission, the CAN message is transmitted until manual operation clicking stops transmission, CAN message transmission is stopped when any one condition is met, and the CAN message is continuously transmitted if the frame cycle transmission mode is cycle transmission;
s5: the execution in step S4 is stopped, and the process ends.
Further, the CAN message sending mode includes a packet cycle sending mode and a frame cycle sending mode.
Further, the conditions for finishing sending the CAN packet in step S4 include packet cycle and frame cycle, where the packet cycle: if the packet sending mode is the sending times, the whole packet is finished when the sending times are reached; if the packet sending mode is cyclic sending, the packet is sent until manual operation clicks to stop sending;
the frame is circulated: if the sending mode is the sending times, the message is finished when the sending times are reached, and when all the messages are finished, the CAN message is finished; if the sending mode is the circular sending, the sending is continued until the manual operation clicks to stop sending.
Further, the packet cyclic sending method flow is as follows: all sent messages are treated as a whole, first frame messages in the packets are sent to a BMS battery management system through CAN communication, and the interval time between adjacent frames is waited; sending a second frame message in the packet, and waiting for the interval time of adjacent frames; and repeating the steps until the last frame of message in the packet is sent, waiting for the maximum value millisecond between the interval of the adjacent frames and the interval of the packet, and starting the next round of packet data sending.
Further, the frame cycle sending method flow is as follows: when the messages are sent for the first time, all the messages are sent for the same time, the priorities are arranged, the messages are selected to be sent, the messages from the first frame to the Nth frame are sequentially judged, the message Y which is longest from the last sending time and meets the interval of the messages at a millisecond or more is found, namely, the message Y is sent to a BMS battery management system through CAN communication, and after the sending is completed, the interval of the adjacent frames is waited for a millisecond; and selecting a message to be sent from the priority, and starting to continue round-robin judgment and sending.
Further, the data content sent next time by each frame of message is a message increment sub-process.
Further, the packet increment sub-process includes the following steps:
firstly, sending an initial message;
the message is increased progressively, and the step length is increased progressively according to the byte sequence and the appointed byte;
judging whether the specified byte data is larger than or equal to the incremental upper limit, and continuing the second step if the specified byte data is not larger than the incremental upper limit;
fourthly, gradually increasing the upper limit message sending.
The invention has the beneficial effects that:
(1) the battery detection method based on the CAN bus message sending has simple operation and strong practicability, and CAN save a large amount of labor cost;
(2) the invention solves the problem that the battery CAN send CAN messages at any time through the battery detection equipment in the experimental stage, observes the state and the performance of the battery and is convenient for a user to quickly verify the BMS battery management system;
(3) the invention can also explore a mature test scheme, explore the number of times that different batteries send corresponding messages in different stages, can make the battery performance reach an optimum, not only greatly shorten the user verification time, but also facilitate the user's later-stage mass production;
(4) the method has strong autonomy, does not need to be bound with a process step 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 the battery detection equipment and the battery BMS.
[ description of the drawings ]
FIG. 1 is a schematic flow chart of a battery detection method for sending messages based on a CAN bus according to the present invention;
FIG. 2 is a flow chart of a frame cyclic transmission method according to the present invention;
FIG. 3 is a flow chart of a packet round-robin transmission scheme according to the present invention;
fig. 4 is a schematic diagram of a message increment sub-process according to the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the accompanying drawings and the detailed description:
example 1: as shown in fig. 1, a battery detection method based on CAN bus message transmission includes 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 parameters such as a CAN interface, a cycle type, an adjacent frame interval, a packet sending mode, packet sending times, a name, data, a sending mode, sending times, an interval, data increasing, a byte sequence, a starting byte, a byte length, an increasing step length, an increasing upper limit and the like, clicking to determine, instantly finishing all customized parameters, and automatically generating a required derivative value set for all customized parameters;
the packet sending mode is as follows: the method is effective when the loop type selects packet loops, and mainly comprises multiple sending and loop sending. When the multi-time transmission is selected, the transmission is finished when the packet is transmitted for the designated times; when the cyclic sending is selected, the packet is sent circularly all the time;
the sending mode is as follows: it is effective when the cycle selection frame is circulated, and mainly consists of multiple transmissions and cyclic transmissions. When the message is sent for multiple times, the message is sent for the appointed times, and then the sending is finished; when the cyclic sending is selected, the message is sent circularly all the time;
the number of sending times is as follows: the message sending times are effective when the sending mode is selected to send for multiple times;
the interval is as follows: the time interval between the next transmission of the frame and the current frame;
the data is incremented: if the two conditions are not the same, the selection is effective if the two conditions are the same, otherwise, the selection is not effective;
the byte order is: the method for storing the message data mainly comprises an Intel and a Motorola, wherein the low bit of the Intel is in the low byte, and the high bit of the Intel is in the high byte; motorola is low on high byte and high on low byte;
the start byte: the initial byte position of the incremental data is in the range of 0-7, and the CANFD is in the range of 0-63;
the length of the bytes is as follows: the length of the incremental data is 1-8, and the CANFD is 1-64;
the increment step size is as follows: the size of each increment;
the incremental upper limit: the maximum value of the data is increased, namely the maximum value can only be increased to the value;
s3: executing a CAN message sending process after the CAN message editing is performed in the step S2, and flexibly sending the CAN message by using customized set parameters;
s4: judging according to the condition of finishing sending the CAN message, if the sending mode of the packet cycle packet is the sending times, finishing the whole packet when the sending times are reached; if the packet circulating packet sending mode is circulating sending, the packet circulating packet is sent until manual operation clicks to stop sending; if the frame cycle transmission mode is the transmission times, stopping transmitting the message when the message reaches the transmission times, and when all the messages are transmitted, finishing transmitting the CAN message; if the frame cyclic sending mode is cyclic sending, the frame cyclic sending mode is sent until manual operation clicking stops sending; if any condition is met, the CAN message transmission is stopped, otherwise, the CAN message is continuously transmitted;
s5: the execution in step S4 is stopped, and the process ends.
Embodiment 2, as shown in fig. 2 and fig. 3, the CAN message sending mode includes a packet cycle sending mode and a frame cycle sending mode.
Preferably, the conditions for finishing sending the CAN packet in step S4 include packet cycle and frame cycle, where the packet cycle: if the packet sending mode is the sending times, the whole packet is finished when the sending times are reached; if the packet circulating packet sending mode is circulating sending, the packet circulating packet is sent until manual operation clicks to stop sending;
the frame is circulated: if the sending mode is the sending times, the message is finished when the sending times are reached, and when all the messages are finished, the CAN message is finished; if the sending mode is the circular sending, the sending is continued until the manual operation clicks to stop sending.
Preferably, the packet cyclic transmission mode is as follows: all sent messages are treated as a whole, first frame messages in the packets are sent to a BMS battery management system through CAN communication, and the interval time between adjacent frames is waited; sending a second frame message in the packet, and waiting for the interval time of adjacent frames; and repeating the steps until the last frame of message in the packet is sent, waiting for the maximum value millisecond between the interval of the adjacent frames and the interval of the packet, and starting the next round of packet data sending.
Preferably, the frame cycle transmission method flow is as follows: when the messages are sent for the first time, all the messages are sent for the same time, the priorities are arranged, the messages are selected to be sent, the messages from the first frame to the Nth frame are sequentially judged, the message Y which is longest from the last sending time and meets the interval of the messages at a millisecond or more is found, namely, the message Y is sent to a BMS battery management system through CAN communication, and after the sending is completed, the interval of the adjacent frames is waited for a millisecond; and selecting a message to be sent from the priority, and starting to continue round-robin judgment and sending.
Preferably, the data content of the next transmission of each frame of message is a message increment sub-process.
Embodiment 3 as shown in fig. 4, the packet increment sub-process includes the following steps:
firstly, sending an initial message;
the message is increased progressively, and the step length is increased progressively according to the byte sequence and the appointed byte;
judging whether the specified byte data is larger than or equal to the incremental upper limit, and continuing the second step if the specified byte data is not larger than the incremental upper limit;
fourthly, gradually increasing the upper limit message sending.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (7)
1. A battery detection method based on CAN bus message transmission 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 parameters such as a CAN interface, a cycle type, an adjacent frame interval, a packet sending mode, packet sending times, a name, data, a sending mode, sending times, an interval, data increasing, a byte sequence, a starting byte, a byte length, an increasing step length, an increasing upper limit and the like, clicking to determine, instantly finishing all customized parameters, and automatically generating a required derivative value set for all customized parameters;
s3: executing a CAN message sending process after the CAN message editing is performed in the step S2, and flexibly sending the CAN message by using customized set parameters;
s4: judging according to the condition of finishing sending the CAN message, if the packet cycle packet sending mode is the sending times, stopping sending the whole packet when the packet sending times is reached; if the packet circulating packet sending mode is circulating sending, the packet circulating packet is sent until manual operation clicks to stop sending; if the frame cycle transmission mode is the transmission times, stopping transmitting the message when the message reaches the transmission times, and when all the messages are transmitted, finishing transmitting the CAN message; if the frame cycle transmission mode is cycle transmission, the CAN message is transmitted until manual operation clicking stops transmission, CAN message transmission is stopped when any one condition is met, and the CAN message is continuously transmitted if the frame cycle transmission mode is cycle transmission;
s5: the execution in step S4 is stopped, and the process ends.
2. The CAN-bus-based battery detection method for sending messages according to claim 1, characterized in that: the CAN message sending mode comprises a packet cycle sending mode and a frame cycle sending mode.
3. The CAN-bus-based battery detection method for sending messages according to claim 1, characterized in that: the conditions for finishing sending the CAN message in step S4 include packet cycle and frame cycle, where the packet cycle: if the packet sending mode is the sending times, the whole packet is finished when the sending times are reached; if the packet sending mode is cyclic sending, the packet is sent until manual operation clicks to stop sending;
the frame is circulated: if the sending mode is the sending times, the message is finished when the sending times are reached, and when all the messages are finished, the CAN message is finished; if the sending mode is the circular sending, the sending is continued until the manual operation clicks to stop sending.
4. The CAN-bus-based battery detection method for sending messages according to claim 2, characterized in that: the packet cyclic sending mode flow is as follows: all sent messages are treated as a whole, first frame messages in the packets are sent to a BMS battery management system through CAN communication, and the interval time between adjacent frames is waited; sending a second frame message in the packet, and waiting for the interval time of adjacent frames; and repeating the steps until the last frame of message in the packet is sent, waiting for the maximum value millisecond between the interval of the adjacent frames and the interval of the packet, and starting the next round of packet data sending.
5. The CAN-bus-based battery detection method for sending messages according to claim 2, characterized in that: the frame cycle sending mode flow is as follows: when the messages are sent for the first time, all the messages are sent for the same time, the priorities are arranged, the messages are selected to be sent, the messages from the first frame to the Nth frame are sequentially judged, the message Y which is longest from the last sending time and meets the interval of the messages at a millisecond or more is found, namely, the message Y is sent to a BMS battery management system through CAN communication, and after the sending is completed, the interval of the adjacent frames is waited for a millisecond; and selecting a message to be sent from the priority, and starting to continue round-robin judgment and sending.
6. The CAN-bus based battery detection method for sending messages according to claim 4, wherein: the data content sent next time by each frame of message is a message increment sub-process.
7. The CAN-bus based battery detection method for sending messages according to claim 6, wherein: the message increment sub-process comprises the following steps:
firstly, sending an initial message;
the message is increased progressively, and the step length is increased progressively according to the byte sequence and the appointed byte;
judging whether the specified byte data is larger than or equal to the incremental upper limit, and continuing the second step if the specified byte data is not larger than the incremental upper limit;
fourthly, gradually increasing the upper limit message sending.
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