CN109100978B - Battery management system address setting and checking method - Google Patents
Battery management system address setting and checking method Download PDFInfo
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- CN109100978B CN109100978B CN201811117448.6A CN201811117448A CN109100978B CN 109100978 B CN109100978 B CN 109100978B CN 201811117448 A CN201811117448 A CN 201811117448A CN 109100978 B CN109100978 B CN 109100978B
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0421—Multiprocessor system
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Abstract
The invention provides a battery management system address setting and checking method, which comprises an upper computer and slave control modules, wherein each slave control module is provided with a PWM (pulse-width modulation) input interface and a PWM output interface for setting an address, and the slave control modules and the upper computer are communicated through a CAN (controller area network) bus; the initial software and hardware of the slave control module are completely consistent. When the address is set, the upper computer sends slave control address setting information, when the PWM input interface signal is effective and the current slave control address is an empty address, the slave control address in the upper computer message is set as the current slave control address, then the PWM output interface is set as effective, all slave control module address setting is completed in sequence, then verification is performed, the address setting is completed if the verification is passed, the address setting is abandoned if the verification is failed, and the original address is reserved. The invention simplifies the address setting process of the battery management system, increases the reliability and correctness of the address setting, improves the standardization and the universality of products, and improves the assembly and production efficiency of the system.
Description
Technical Field
The invention relates to the technical field of battery management systems of electric vehicles, in particular to an address setting and checking method of a battery management system.
Background
The battery management system of the electric automobile is divided into a master control module and a slave control module, and each system is generally internally provided with one master control module and a plurality of slave control modules. And the slave control module corresponds to a module or a battery box and is responsible for collecting the voltage, the temperature and other information of the single battery and reporting the information to the master control module through the CAN bus. In order to be able to distinguish the battery information corresponding to different battery boxes or modules, each slave control module needs a different address to distinguish and identify it.
At present, the internal battery management system of the industry mainly comprises the following methods of controlling the module address setting:
scheme 1: and identifying on the slave control module hardware or the wire harness, and determining the current slave control module address through the differentiated identification during the manufacture of the slave control module hardware circuit or the wire harness.
Scheme 2: and reserving address difference identification in the slave control module software or directly presetting slave control module address in the software before delivery.
Scheme 3: and after the power is on, the master control module performs random address allocation on each slave control module.
According to the scheme 1 and the scheme 2, the slave control module address needs to be solidified or the slave control module differential identifier needs to be reserved, standardized production of the slave control module cannot be realized, the method can not be generalized during installation of the slave control module, the control is complex, and the error probability is high. Each slave control address setting in the scheme 3 has randomness, cannot be guaranteed to be matched with an expected slave control address and a battery number, and the three schemes cannot verify the correctness of the slave control address sequence.
Disclosure of Invention
The invention aims to provide a method for setting and checking an address of a battery management system, which is used for solving the problems of low standardization degree of a slave control module, complex control and management in an installation process, imperfect check on the correctness of a slave control address and the like in the prior art.
The technical scheme adopted for solving the technical problems is as follows: a method for setting and checking addresses of a battery management system comprises an upper computer and a plurality of slave control module power supplies, wherein each slave control module is provided with a PWM input interface and a PWM output interface for setting addresses, the first slave control module PWM input interface is connected with the slave control module power supply, the next slave control module PWM input interface is connected with the previous slave control module PWM output interface, and the last slave control module PWM output interface is suspended to form a structure which is connected in series in sequence. The initial software and hardware of the slave control module are completely consistent, differential identification information is not needed, complete equivalent replacement CAN be achieved, and all the slave control modules in the system are communicated with the upper computer through the CAN bus. When the addresses are set, the upper computer sends information such as slave control address setting sequence, initial slave control addresses and slave control quantity, when PWM input interface signals are effective and the current slave control addresses are empty addresses, the slave control addresses in the received upper computer CAN messages are set as the current slave control addresses, then the PWM output interfaces are set to be effective, all slave control module address setting is completed in sequence, then all slave control module address setting in system connection is verified, if the verification is passed, the current address setting is completed, if the verification is failed, the current address setting is abandoned, and the original addresses are reserved. The invention simplifies the address setting process of the battery management system, increases the reliability and correctness of the address setting, improves the standardization and the universality of products, and improves the assembly and production efficiency of the system.
The specific steps of the address setting comprise:
s1: the upper computer sends a slave control module address setting starting message and an address setting message through slave control address setting sequence, starting slave control address and slave control quantity information input by an operation interface; and the upper computer sends a starting message and an address message through the CAN bus. Parameters such as slave control address setting sequence, starting slave control address, slave control quantity and the like can be adjusted through the upper computer.
S2: and after receiving an address setting message sent by an upper computer, the slave control module in the system sets the self address as an empty address (254), and sets the output signal state of the PWM output interface to be invalid.
S3: the method comprises the steps that a slave control module in a system detects whether a PWM input interface signal is effective or not, if the slave control module detects that the PWM input interface signal is effective and the address of the slave control module is a null address, the address in a received upper computer message is set as the slave control address of the slave control module, then the PWM output interface signal is set to be effective, and meanwhile a message of successful address setting is sent and fed back to an upper computer; otherwise, no processing is performed.
S4: after the upper computer receives the address setting success message, the upper computer updates the slave control module address in the message and sends the next slave control address to be set; while performing address setting, the system determines whether the number of set slave addresses is equal to the number of slave controls input by the upper computer operation interface, if not, repeats steps S3 and S4 to perform slave control module address setting, and if so, proceeds to step S5. And when the upper computer receives the slave control address setting success message and is overtime, the step S5 is entered.
S5: repeating the steps S3 and S4 until the upper computer sends that the number of the slave control addresses to be set is equal to the number of the slave control addresses input by the operation interface, and receives the address setting success message feedback of all the slave control addresses to be set; or the upper computer does not receive the slave control module address setting success message within the specified time, namely the upper computer receives the slave control address setting success message and then sends the slave control module address verification message when the message is overtime.
And after the setting of the slave module block address is completed, checking all the slave module block addresses in the system connection, if the checking is passed, completing the address setting, and if the checking is failed, discarding the address setting and keeping the original address.
S6: and the slave control module which receives the address check message detects the state of the PWM input interface, if the PWM input interface signal is valid, the slave control module stops message transmission after transmitting the slave control address declaration message for a plurality of times, and then sets the output of the PWM output interface as a valid signal.
S7: the upper computer sorts the slave module addresses and counts the slave module addresses according to the slave module addresses declared by the received slave module address declaration message; the address setting operation of the current time is successful if the declared slave control module has no empty address and no repeated address, and the setting sequence information of the number of the slave control addresses, the initial slave control address and the slave control address is consistent with the input information of the upper computer operation interface, and each slave control module solidifies the address obtained by the current time; if the declared slave control module address has an empty address, or has a duplicate address, or the number of slave control addresses, the initial slave control address and the slave control address setting sequence information are inconsistent with the input information of the upper computer operation interface, the address setting operation fails, the address obtained by the address setting operation is abandoned, and the address state before the address setting operation is reserved.
S8: and finishing the slave module control block address setting and checking process.
Wherein, the steps S1-S5 are the steps of setting the address, and the steps S6-S7 are the steps of checking the address. According to the method, the slave control address setting and verification can be completed only by the upper computer and the slave control module, and master control participation is not needed.
The invention has the beneficial effects that: according to the address setting and checking method for the battery management system, provided by the invention, the initial software and hardware of all the slave control modules are completely consistent, differential identification information is not required, and complete equivalent replacement of any two slave control modules can be realized. The assembly process is avoided from controlling the position installation mistake, the production efficiency is improved, and the production control complexity is reduced. Meanwhile, the address setting operation result can be verified, the error conditions of the idle address, the repeated address, the address sequence, the number and the like in the slave control module can be found in time, and the system safety is improved.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic diagram of system connection according to an embodiment of the present invention.
FIG. 2 is a flow chart of an embodiment of the present invention.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
As shown in fig. 1, the battery management system of the present invention includes an upper computer, a plurality of slave control modules, each slave control module has a PWM input interface and a PWM output interface for setting an address, the first slave control module PWM input interface is connected to the slave control module power supply, the next slave control module PWM input interface is connected to the previous slave control module PWM output interface, and the last slave control module PWM output interface is suspended to form a serial structure. The initial software and hardware of the slave control module are completely consistent, differential identification information is not needed, complete equivalent replacement CAN be achieved, and all the slave control modules in the system are communicated with the upper computer through the CAN bus.
As shown in fig. 2, the method for setting and verifying the address of the battery management system according to the present invention includes the following steps:
s1: inputting the setting sequence of the slave control module address, the initial slave control address and the slave control quantity information at the upper computer operation interface, then starting the slave control module address setting flow, and sending a slave control module address setting starting message and an address setting message by the upper computer; and the upper computer sends a starting message and an address message through the CAN bus. Parameters such as slave control address setting sequence, starting slave control address, slave control quantity and the like can be adjusted through the upper computer.
S2: and after receiving an address setting message sent by an upper computer, the slave control module in the system sets the self address as an empty address (254), and sets the output signal state of the PWM output interface to be invalid.
S3: the method comprises the steps that a slave control module in a system detects whether a PWM input interface signal is effective or not, if the slave control module detects that the PWM input interface signal is effective and the address of the slave control module is a null address, the address in a received upper computer message is set as the slave control address of the slave control module, then the PWM output interface signal is set to be effective, and meanwhile a message of successful address setting is sent and fed back to an upper computer; otherwise, no processing is performed.
S4: and after the upper computer receives the address setting success message, the upper computer updates the slave control module address in the message, sends the next slave control address to be set, judges whether the number of the set slave control addresses is equal to the slave control number input by the operation interface of the upper computer or not while setting the address, repeats the steps S3 and S4 to set the slave control module address if the number of the set slave control addresses is not equal to the slave control number input by the operation interface of the upper computer, and enters the step S5 if the number of the set slave control addresses is equal to the slave control module address. And when the upper computer receives the slave control address setting success message and is overtime, the step S5 is entered.
S5: repeating the operation of the step S3 and the operation of the step S4 until the upper computer sends that the number of the slave control addresses to be set is equal to the number of the slave controls input by the operation interface, and receives the address setting success message feedback of all the slave control addresses to be set; or the upper computer does not receive the slave control module address setting success message within the specified time, namely the upper computer receives the slave control address setting success message and then sends the slave control module address verification message when the message is overtime.
And after the setting of the slave module block address is completed, checking all the slave module block addresses in the system connection, if the checking is passed, completing the address setting, and if the checking is failed, discarding the address setting and keeping the original address.
S6: and the slave control module which receives the address check message detects the state of the PWM input interface, if the PWM input interface signal is valid, the slave control module stops message transmission after transmitting the slave control address declaration message for a plurality of times, and then sets the output of the PWM output interface as a valid signal.
S7: the upper computer sorts the slave module addresses and counts the slave module addresses according to the slave module addresses declared by the received slave module address declaration message; the address setting operation of the current time is successful if the declared slave control module has no empty address and no repeated address, and the setting sequence information of the number of the slave control addresses, the initial slave control address and the slave control address is consistent with the input information of the upper computer operation interface, and each slave control module solidifies the address obtained by the current time; if the declared slave control module address has an empty address, or has a duplicate address, or the number of slave control addresses, the initial slave control address and the slave control address setting sequence information are inconsistent with the input information of the upper computer operation interface, the address setting operation fails, the address obtained by the address setting operation is abandoned, and the address state before the address setting operation is reserved.
Wherein, the steps S1-S5 are the steps of setting the address, and the steps S6-S7 are the steps of checking the address. According to the method, the slave control address setting and verification can be completed only by the upper computer and the slave control module, and master control participation is not needed.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. A method for setting and checking an address of a battery management system is characterized in that: the system comprises an upper computer and a plurality of slave control modules, wherein each slave control module is provided with a PWM input interface and a PWM output interface for address setting, the PWM input interface of the first slave control module is connected with a power supply of the slave control module, the PWM input interface of the next slave control module is connected with the PWM output interface of the previous slave control module, the PWM output interface of the last slave control module is suspended, and the slave control modules in the system are communicated with the upper computer through a CAN bus;
further comprising the steps of: s1: the upper computer sends a slave control module address setting starting message and an address setting message through slave control address setting sequence, starting slave control address and slave control quantity information input by an operation interface;
s2: after receiving an address setting message sent by an upper computer, a slave control module in the system sets the address of the slave control module as an empty address and sets the output signal state of a PWM output interface of the slave control module as invalid;
s3: the method comprises the steps that a slave control module in a system detects whether a PWM input interface signal is effective or not, if the slave control module detects that the PWM input interface signal is effective and the address of the slave control module is a null address, the address in a received upper computer message is set as the slave control address of the slave control module, then the PWM output interface signal is set to be effective, and meanwhile a message of successful address setting is sent and fed back to an upper computer; otherwise, no processing is carried out;
s4: after the upper computer receives the address setting success message, the upper computer updates the slave control module address in the message and sends the next slave control address to be set;
s5: repeating the operation of the step S3 and the operation of the step S4 until the upper computer sends that the number of the slave control addresses to be set is equal to the number of the slave controls input by the operation interface, and receives the address setting success message feedback of all the slave control addresses to be set; or the upper computer does not receive the slave control module address setting success message within the specified time, namely the upper computer receives the slave control address setting success message and then sends the slave control module address verification message when the message is overtime;
s6: the slave control module receiving the address check message detects the state of the PWM input interface, if the PWM input interface signal is valid, the slave control module stops message transmission after transmitting the slave control address declaration message for a plurality of times, and then sets the output of the PWM output interface as a valid signal;
s7: the upper computer sorts the slave module addresses and counts the slave module addresses according to the slave module addresses declared by the received slave module address declaration message; the address setting operation of the current time is successful if the declared slave control module has no empty address and no repeated address, and the setting sequence information of the number of the slave control addresses, the initial slave control address and the slave control address is consistent with the input information of the upper computer operation interface, and each slave control module solidifies the address obtained by the current time; if the declared slave control module address has an empty address, or has a duplicate address, or the number of slave control addresses, the initial slave control address and the slave control address setting sequence information are inconsistent with the input information of the upper computer operation interface, the address setting operation fails, the address obtained by the address setting operation is abandoned, and the address state before the address setting operation is reserved;
s8: the slave module control block address setting and checking process is finished;
the slave control module is completely consistent in initial software and hardware, and does not need differentiated identification information.
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| CN113010463B (en) * | 2019-12-20 | 2024-05-14 | 林德（中国）叉车有限公司 | IIC communication method and system for lithium battery management |
| CN111586205B (en) * | 2020-05-13 | 2021-01-15 | 贵州浙储系统科技有限公司 | Method for automatically allocating slave machine address in battery management system |
| CN112422704B (en) * | 2020-09-27 | 2023-04-18 | 量道(深圳)储能科技有限公司 | Address allocation method and device for multiple devices and storage medium |
| CN113114545B (en) * | 2021-03-26 | 2023-04-18 | 珠海格力电器股份有限公司 | Equipment ad hoc network method and device and air conditioning system |
| CN113765760B (en) * | 2021-07-26 | 2023-05-12 | 江苏科曜能源科技有限公司 | Method for automatically distributing address of slave control unit by battery management system |
| CN113702856A (en) * | 2021-08-27 | 2021-11-26 | 华自科技股份有限公司 | Electric quantity display device and method |
| CN113764748B (en) * | 2021-09-01 | 2023-07-07 | 固德威技术股份有限公司 | Battery management system and multi-cluster parallel energy storage system applying same |
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| CN108333527B (en) * | 2018-02-06 | 2020-02-14 | 中航锂电技术研究院有限公司 | Battery management system loop interlocking and slave control address setting method |
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Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: Kaibo Energy Technology Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: Kaibo Energy Technology Co.,Ltd. Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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Effective date of registration: 20220113 Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |