CN108819733B - Power-on control method and device of battery management system - Google Patents
Power-on control method and device of battery management system Download PDFInfo
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- CN108819733B CN108819733B CN201810420000.5A CN201810420000A CN108819733B CN 108819733 B CN108819733 B CN 108819733B CN 201810420000 A CN201810420000 A CN 201810420000A CN 108819733 B CN108819733 B CN 108819733B
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Abstract
The invention relates to the field of electronic appliances, and provides a power-on control method and a power-on control device for a battery management system. In the power-on control method of the battery management system, the BMS can obtain a key signal, the key signal is a wake-up signal of the BMS, and the BMS controls the components to start initialization and self-check when the key signal is obtained. After the BMS completes initialization and self-inspection, when the BMS is determined to be fault-free, the BMS obtains a high-voltage pre-charging signal of the VCU and performs a high-voltage pre-charging operation. In the invention, the BMS can be directly used as a control component, initialization and self-checking are carried out firstly during power-on, less VCU resources are occupied, and the BMS can be well matched with the VCU to complete power-on operation. Meanwhile, due to the fact that initialization and self-checking are conducted before power is supplied, the safety of the whole vehicle can be improved.
Description
Technical Field
The invention relates to the field of electronic appliances, in particular to a power-on control method and a power-on control device for a battery management system.
Background
The new energy automobile is an important development direction of the automobile industry at present, and a considerable part of the new energy automobiles are electrically driven, so that the battery management system is a large core component on the new energy automobile, and in different electronic and electrical architectures, the system development of the battery management system is related to the controllability of the system work of the whole automobile, so that the function control which can be realized by the battery management system is more important.
The existing electric automobile power-on and power-off control strategy is to control the high-voltage power-on and power-off safety of the whole automobile by collecting the action signals of a key, a pedal and other drivers and communicating through subsystems such as a CAN bus, a BMS (battery management system) and a motor controller on the premise of the existing whole automobile power system structure. Meanwhile, in the power-on and power-off process, the high-voltage fault of the power system of the whole vehicle is diagnosed and corresponding treatment is rapidly carried out.
In the prior art, after a finished vehicle is powered on and a wake-up signal is obtained by a VCU (finished vehicle controller), a BMS (battery management system) is wakened up by the VCU (finished vehicle controller), and after the BMS (battery management system) is determined to be fault-free, a high-voltage pre-charging instruction is sent, and the BMS (battery management system) executes high-voltage pre-charging. In the prior art control strategy, the BMS (battery management system) is controlled mainly by the VCU (vehicle control unit). Because the VCU (vehicle control unit) needs to coordinate the actions of the vehicle, and the BMS (battery management system) is under the relative auxiliary control function, the BMS (battery management system) needs the VCU (vehicle control unit) to participate in the whole process during power-on control, and the VCU (vehicle control unit) is often occupied, so that the processing burden of the VCU (vehicle control unit) is increased. Eventually causing problems such as delay in power-up.
Disclosure of Invention
The invention aims to solve the technical problem that a BMS occupies more control functions of a VCU when being electrified. In order to solve the above problems, the present invention provides a power-on control method and device for a battery management system, and the present invention is specifically implemented by the following technical scheme:
a first aspect of the present invention provides a power-on control method for a battery management system, the method including:
detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not, and whether a network message is received for awakening or not;
reading an internal nonvolatile storage history fault, performing initialization operation, and judging whether the initialization is successful;
reporting the awakening reason and the state to a whole vehicle network;
judging whether a fault exists;
judging whether the finished automobile awakening source stops working or not;
acquiring a high-voltage power-on pre-charging command sent by a control module, executing high-voltage pre-charging operation, and judging whether the high-voltage pre-charging is finished within a specified time;
reporting the state of the high-voltage relay to a whole vehicle network;
a high voltage discharge is performed.
Further, after obtaining the key signal IG1 valid, the real-time clock wakeup valid, and the network message wakeup valid, an initialization operation is performed. The interface of the execution module is connected with the key signal, when the key signal IG1 is valid, the execution module obtains the clock wake-up and the network message, and the execution module can start initialization.
Further, when the fault is judged to exist, reporting the fault and the fault level.
And further, judging the level of the fault, continuing the power-on operation when the fault level is low, and stopping the power-on operation when the fault level is high.
Further, the faults include insulation faults, high-voltage interlock faults, total voltage anomalies, cell voltage anomalies and current signal anomalies.
Further, when the high-voltage pre-charging is not completed within the specified time, reporting the high-voltage power-on overtime fault.
Furthermore, when the initialization fails, an initialization failure flag bit is set, and the power-off operation is carried out. When the initialization fails, the execution module cannot carry out CAN communication with the whole vehicle, an initialization failure flag bit is set, if the communication CAN be established at the moment, an error is reported and the power-off operation is carried out, if the communication cannot be carried out, the next step cannot be carried out, and the user needs to carry out the power-on operation again.
In the power-on process, after a PEPS (keyless entry and start system) or an ignition key sends a start signal, the execution module receives an IG1 signal, and after the IG1 signal is obtained, the execution module can start to complete the normal power-on operation of the low-voltage control part, and in the process, the execution module can perform initial self-checking and initialization operation.
After the initialization is successful, the fault detection module reads various interfaces to detect whether faults exist, determines whether to erase the faults and continue the power-on operation or quit the power-on operation and report errors according to the level of the faults, stops the power-on operation and reports the errors if the level of the faults is higher, and continues the power-on operation if the level of the faults is lower.
When the fault detection module judges that the monomer voltage detection, the total voltage detection, the temperature information, the insulation resistance detection and the like are in normal states, the standby state can be entered, and a request command of closing the high-voltage relay of the control module is waited.
After the control module sends out an instruction for closing the high-voltage relay, if the execution module cannot close the high-voltage relay within the specified time, the execution module sends feedback that the precharging is unsuccessful to the whole vehicle network.
When the execution module closes the high-voltage relay within the specified time, the information that the high-voltage relay is closed is fed back to the control module, and the execution module can enter a corresponding high-voltage discharge state. And after the high-voltage relay is closed, a control flow is completed, and the whole battery management system is electrified.
The second aspect of the present invention provides a power-on control device of a battery management system, which is characterized in that the device includes a key signal receiving module, a clock module, a communication module, an execution module, a control module and a fault detection module;
the key signal receiving module is used for receiving a key signal, the clock module is used for acquiring a clock wake-up signal, and the communication module is used for acquiring network message wake-up;
the execution module is used for executing initialization operation and power-on operation;
the fault detection module is used for detecting faults;
the control module is used for controlling the execution module to execute high-pressure pre-charging operation.
Further, when the key signal, the clock wake-up signal and the network message wake-up signal are valid, the execution module performs an initialization operation.
Furthermore, the communication module is also used for enabling the execution module to communicate with the whole vehicle network and enabling the execution module to communicate with the control module.
And when the execution module is initialized successfully, the fault detection module carries out fault detection. Under the condition that insulation faults, high-voltage faults and current faults are not detected, the control module sends a power-on pre-charging command to the execution module, and the execution module executes high-voltage pre-charging operation.
By adopting the technical scheme, the power-on control method and the power-on control device for the battery management system have the following beneficial effects that:
1) the BMS (battery management system) is designed to be capable of receiving the key signal, so that the BMS (battery management system) can be directly awakened by the key signal without passing through a VCU (vehicle control unit), the BMS (battery management system) can be used as a control component, initialization and self-check are performed firstly during power-on, less resources of the VCU (vehicle control unit) are occupied, and the battery management system can be well matched with the VCU (vehicle control unit) to complete power-on operation;
2) the BMS (battery management system) can be initialized and self-checked after the key signal is obtained, can avoid some faults in advance, and improves the safety of the whole vehicle in power-on.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a power-on control method of a battery management system according to an embodiment of the present invention;
fig. 2 is a specific flowchart of a power-on control method of a battery management system according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting an insulation fault during power-up according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for detecting a voltage fault at power-up according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for detecting a current fault on power-up according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for detecting a precharge timeout fault at power-up according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a power-on control device of a battery management system according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
an embodiment of the present invention provides a power-on control method for a battery management system, and as shown in fig. 1, the method includes:
s001, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not, and whether a network message is received for awakening or not;
s002, reading the internal nonvolatile storage history fault, performing initialization operation, and judging whether the initialization is successful;
s003, reporting the awakening reason and the state to a whole vehicle network;
s004, judging whether a fault exists;
s005, judging whether the whole vehicle awakening source stops working or not;
s006, acquiring a high-voltage power-on pre-charging command sent by the control module, executing high-voltage pre-charging operation, and judging whether the high-voltage pre-charging is finished within a specified time;
s007, reporting the state of the high-voltage relay to a whole vehicle network;
s008, high-voltage discharge is performed.
The specific steps are as follows, as shown in fig. 2:
s1, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not and whether a network message is awakened or not;
s2, reading internal nonvolatile storage history faults and carrying out initialization operation;
s3, judging whether the initialization is successful;
s4, reporting the awakening reason and the state to a whole vehicle network;
s5, judging whether an insulation fault exists or not;
s6, judging whether a high-voltage interlocking fault exists or not;
s7, judging whether the total voltage is abnormal or not;
s8, judging whether the voltage of the single body is abnormal or not;
s9, judging whether current signal abnormity exists or not;
s10, entering a standby mode;
s11, judging whether the key signal IG1 disappears, judging whether the network awakening message disappears, judging whether the clock awakening source disappears, and judging whether the signal of the clock awakening source disappears continuously for 30S;
s12, receiving a high-voltage power-on pre-charging instruction sent by the vehicle controller, and when the high-voltage power-on pre-charging instruction sent by the vehicle controller cannot be received, circulating the step until the high-voltage power-on pre-charging instruction is received;
s13, executing high-pressure pre-charging operation;
s14, judging whether the high-pressure pre-charging is finished within a specified time;
s15, reporting the state of the high-voltage relay to a whole vehicle network;
and S16, performing high-voltage discharge.
The interface of the BMS (battery management system) is connected with the key signal, when the key signal IG1 is effective, the BMS (battery management system) obtains clock wake-up and network messages, and the BMS (battery management system) can start initialization.
The BMS (battery management system) during power-up is controlled by components that operate on the entire vehicle. Once a VCU (vehicle control unit) detects an active wake-up source, a BMS (battery management system) initializes and performs a self-checking operation, and reads a corresponding fault state including a corresponding historical fault, and a human-machine interface of the vehicle determines what state the VCU (vehicle control unit) needs to be in by collecting information of the human-machine interface. After the BMS (battery management system) performs the self-test operation, a corresponding power-on operation is performed, and if the VCU (vehicle control unit) sends a high-voltage relay closing command to the BMS (battery management system), the BMS (battery management system) completes the corresponding operation of closing the high-voltage relay within a predetermined time, for example, within 500 ms, so that the VCU (vehicle control unit) and the BMS (battery management system) are matched in function. In the electronic and electrical architecture shown in this embodiment, the BMS (battery management system) implements a control function of the high-voltage relay, and reports information of the BMS (battery management system) to the entire vehicle network in real time.
Specifically, in the power-on process, after the PEPS (keyless entry and start system) or the ignition key sends a start signal, the BMS (battery management system) receives the IG1 signal, and after the IG1 signal is obtained, the BMS (battery management system) can start to complete the normal power-on operation of the low-voltage control part, and in the process, the BMS (battery management system) can perform preliminary self-checking and initialization operations.
When the initialization fails, the BMS (battery management system) cannot carry out CAN communication with the whole vehicle, an initialization failure flag bit is set, if the communication CAN be established at the moment, an error is reported and power-off operation is executed, if the communication cannot be carried out, the next step cannot be carried out, and a user needs to carry out power-on operation again.
After the initialization is successful, the BMS (battery management system) reads various interfaces to detect whether faults exist, determines whether to erase the faults and continue the power-on operation or quit the power-on operation and report errors according to the grade of the faults, stops the power-on operation and reports the errors if the grade of the faults is higher, and continues the power-on operation if the grade of the faults is lower.
When the BMS (battery management system) judges that the cell voltage detection, the total voltage detection, the temperature information, the insulation resistance detection and the like of the BMS are in normal states, the BMS can enter a standby state and wait for a request command of a VCU (vehicle control unit) for closing a high-voltage relay.
After the VCU (vehicle control unit) sends out an instruction for closing the high-voltage relay, if the BMS (battery management system) can not close the high-voltage relay within a specified time, the BMS (battery management system) sends feedback that the pre-charging is unsuccessful to the vehicle network.
When the BMS (battery management system) closes the high-voltage relay within a specified time, the information that the high-voltage relay is closed is fed back to the VCU (vehicle control unit), and the BMS (battery management system) can enter a corresponding high-voltage discharge state. And after the high-voltage relay is closed, a control flow is completed, and the whole battery management system is electrified.
In the power-on control method for the battery management system, provided by the embodiment, the operations of initialization, self-checking and the like of the BMS (battery management system) are realized in the power-on process, so that the BMS (battery management system) can be matched with a VCU (vehicle control unit) and other peripheral components, and by formulating a power-on strategy, the BMS (battery management system) can be matched with the states of the VCU (vehicle control unit) and other components of the vehicle to control the components thereof, and the components thereof can meet the use requirements of the vehicle. And self-checking can be performed in advance in the power-on process to reduce faults in the power-on process, so that the power-on operation is optimized.
Example 2:
the embodiment of the invention provides a method for detecting an insulation fault during power-on, which comprises the following specific steps as shown in fig. 3:
s01, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not and whether a network message is awakened or not;
s02, reading an internal nonvolatile storage history fault, and performing initialization operation;
s03, judging whether the initialization is successful;
s04, reporting the awakening reason and the state to a whole vehicle network;
s05, judging whether an insulation fault exists or not;
s06, reporting the insulation fault juxtaposition insulation fault grade;
and S07, judging the fault level, ending the power-on operation if the fault level is high, and continuing the power-on operation if the fault level is low.
The BMS (battery management system) during power-up is controlled by components that operate on the entire vehicle. Once a VCU (vehicle control unit) detects an active wake-up source, a BMS (battery management system) initializes and performs a self-checking operation, and reads a corresponding fault state including a corresponding historical fault, and a human-machine interface of the vehicle determines what state the VCU (vehicle control unit) needs to be in by collecting information of the human-machine interface.
When a BMS (battery management system) performs self-checking operation, when an insulation fault is detected, the insulation fault is reported and the fault level is collocated, when the fault level is higher, the power-on operation is stopped, and when the fault level is lower, the fault is erased, and the power-on operation is continued.
The method for detecting the insulation fault during power-on provided by the embodiment realizes the operations of initialization self-check and the like of the BMS (battery management system) during the power-on process, and can prevent the insulation fault.
Example 3:
the embodiment of the invention provides a method for detecting voltage faults during power-on, which comprises the following specific steps as shown in fig. 4:
s11, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not and whether a network message is awakened or not;
s12, reading internal nonvolatile storage history faults and carrying out initialization operation;
s13, judging whether the initialization is successful;
s14, reporting the awakening reason and the state to a whole vehicle network;
s15, judging whether an insulation fault exists or not;
s16, judging whether a high-voltage interlocking fault exists or not, reporting the high-voltage interlocking fault and finishing the power-on operation when the high-voltage interlocking fault exists, and continuing the next step when the high-voltage interlocking fault does not exist;
s17, judging whether the total voltage is abnormal or not, reporting the total voltage abnormal fault and finishing the power-on operation when the total voltage is abnormal, and continuing the next step when the total voltage is not abnormal;
and S18, judging whether the cell voltage is abnormal or not, reporting a high-voltage interlocking fault and finishing the power-on operation when the cell voltage is abnormal, and continuing the next step when the high-voltage interlocking fault does not exist.
The BMS (battery management system) during power-up is controlled by components that operate on the entire vehicle. Once a VCU (vehicle control unit) detects an active wake-up source, a BMS (battery management system) initializes and performs a self-checking operation, and reads a corresponding fault state including a corresponding historical fault, and a human-machine interface of the vehicle determines what state the VCU (vehicle control unit) needs to be in by collecting information of the human-machine interface.
When a BMS (battery management system) performs self-checking operation, when a voltage fault is detected, reporting the voltage fault and juxtaposing a fault level, stopping power-on operation when the fault level is higher, and erasing the fault when the fault level is lower, and continuing the power-on operation. The voltage faults include high voltage interlock faults, total voltage anomalies, and cell voltage anomalies. And reporting the high-voltage interlocking fault when the high-voltage interlocking fault occurs. And reporting the fault of the total voltage abnormity when the total voltage abnormity occurs. And reporting the high-voltage interlocking fault when the voltage of the single body is abnormal.
The method for detecting the insulation fault during power-on provided by the embodiment realizes the operations of initialization self-check and the like of the BMS (battery management system) during the power-on process, and can prevent the occurrence of high-voltage faults.
Example 4:
the embodiment of the invention provides a method for detecting a current fault during power-on, which comprises the following specific steps as shown in fig. 5:
s21, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not and whether a network message is awakened or not;
s22, reading internal nonvolatile storage history faults and carrying out initialization operation;
s23, judging whether the initialization is successful;
s24, reporting the awakening reason and the state to a whole vehicle network;
s25, judging whether an insulation fault exists or not;
s26, judging whether a high-voltage interlocking fault exists or not;
s27, judging whether the total voltage is abnormal or not;
s28, judging whether the voltage of the single body is abnormal or not;
s29, judging whether the current signal is abnormal or not, reporting the abnormal fault of the current sensor and finishing the power-on operation when the current signal is abnormal.
The BMS (battery management system) during power-up is controlled by components that operate on the entire vehicle. Once a VCU (vehicle control unit) detects an active wake-up source, a BMS (battery management system) initializes and performs a self-checking operation, and reads a corresponding fault state including a corresponding historical fault, and a human-machine interface of the vehicle determines what state the VCU (vehicle control unit) needs to be in by collecting information of the human-machine interface.
When BMS (battery management system) performs self-checking operation, when the current signal is detected to be abnormal, reporting the abnormal fault of the current sensor and setting the fault level, stopping power-on operation when the fault level is higher, and erasing the fault when the fault level is lower, and continuing the power-on operation.
The method for detecting the insulation fault during power-on provided by the embodiment realizes the operations of initialization self-check and the like of the BMS (battery management system) during the power-on process, and can prevent the occurrence of current faults.
Example 5:
the embodiment of the invention provides a method for detecting a pre-charging timeout fault during power-on, which comprises the following specific steps as shown in fig. 6:
s31, detecting whether a key signal IG1 is effective, whether a real-time clock is effective or not and whether a network message is awakened or not;
s32, reading an internal nonvolatile storage history fault, and performing initialization operation;
s33, judging whether the initialization is successful;
s34, reporting the awakening reason and the state to a whole vehicle network;
s35, judging whether an insulation fault exists or not;
s36, judging whether a high-voltage interlocking fault exists or not;
s37, judging whether the total voltage is abnormal or not;
s38, judging whether the voltage of the single body is abnormal or not;
s39, judging whether current signal abnormity exists or not;
s310, entering a standby mode;
s311, judging whether the key signal IG1 disappears, judging whether the network awakening message disappears, judging whether the clock awakening source disappears, and judging whether the signal of the clock awakening source disappears continuously for 30S;
s312, receiving a high-voltage power-on pre-charging instruction sent by the vehicle controller;
s313, executing high-voltage pre-charging operation;
s314, judging whether the high-voltage pre-charging is finished within the specified time, reporting the high-voltage power-on overtime fault and ending the power-on operation when the high-voltage pre-charging is not finished within the specified time.
The BMS (battery management system) during power-up is controlled by components that operate on the entire vehicle. Once a VCU (vehicle control unit) detects an active wake-up source, a BMS (battery management system) initializes and performs a self-checking operation, and reads a corresponding fault state including a corresponding historical fault, and a human-machine interface of the vehicle determines what state the VCU (vehicle control unit) needs to be in by collecting information of the human-machine interface. After the BMS (battery management system) performs the self-test operation, a corresponding power-on operation is performed, and if the VCU (vehicle control unit) sends a high-voltage relay closing command to the BMS (battery management system), the BMS (battery management system) completes the corresponding operation of closing the high-voltage relay within a predetermined time, for example, within 500 ms, so that the VCU (vehicle control unit) and the BMS (battery management system) are matched in function. In the electronic and electrical architecture shown in this embodiment, the BMS (battery management system) implements a control function of the high-voltage relay, and reports information of the BMS (battery management system) to the entire vehicle network in real time.
Specifically, in the power-on process, after the PEPS (keyless entry and start system) or the ignition key sends a start signal, the BMS (battery management system) receives the IG1 signal, and after the IG1 signal is obtained, the BMS (battery management system) can start to complete the normal power-on operation of the low-voltage control part, and in the process, the BMS (battery management system) can perform preliminary self-checking and initialization operations.
After the initialization is successful, the BMS (battery management system) reads various interfaces to detect whether faults exist, determines whether to erase the faults and continue the power-on operation or quit the power-on operation and report errors according to the grade of the faults, stops the power-on operation and reports the errors if the grade of the faults is higher, and continues the power-on operation if the grade of the faults is lower.
When the BMS (battery management system) judges that the cell voltage detection, the total voltage detection, the temperature information, the insulation resistance detection and the like of the BMS are in normal states, the BMS can enter a standby state and wait for a request command of a VCU (vehicle control unit) for closing a high-voltage relay.
After a VCU (vehicle control unit) sends an instruction of closing a high-voltage relay, if a BMS (battery management system) cannot close the high-voltage relay within a specified time, the BMS (battery management system) sends feedback of unsuccessful pre-charging to a vehicle network, and reports a high-voltage power-on overtime fault.
The method for detecting the insulation fault during power-on provided by the embodiment realizes the operations of initialization self-check and the like of a BMS (battery management system) during the power-on process, and can prevent the occurrence of the pre-charging timeout fault.
Example 6:
an embodiment of the present invention provides a power-on control device of a battery management system, as shown in fig. 7, the device includes a key signal receiving module, a clock module, a communication module, an execution module, a control module, and a fault detection module.
The key signal receiving module is used for receiving a key signal, the clock module is used for acquiring a clock wake-up signal, and the communication module is used for acquiring a network message wake-up.
The execution module is used for executing initialization operation and power-on operation.
The fault detection module is used for detecting faults.
The control module is used for controlling the execution module to execute high-pressure pre-charging operation.
And when the key signal, the clock wake-up signal and the network message wake-up signal are effective, the execution module performs initialization operation.
The communication module is also used for connecting the execution module and the control module to the whole vehicle CAN network, so that the execution module CAN communicate with the control module, and the execution module CAN report information to the whole vehicle CAN network. And when the execution module is successfully initialized, reporting the awakening reason and the state to the whole vehicle network.
And when the execution module is initialized successfully, the fault detection module carries out fault detection. Under the condition that insulation faults, high-voltage faults and current faults are not detected, the control module sends a power-on pre-charging command to the execution module, and the execution module executes high-voltage pre-charging operation.
The execution module, the key signal receiving module, the clock module, the communication module and the fault detection module can be integrated into a BMS (battery management system) to manage power-on control, and the control module can be a VCU (vehicle control unit), the BMS (battery management system) and the VCU (vehicle control unit) to be matched for control, so that the vehicle can normally carry out power-on operation.
The power-on control device of the battery management system provided by the embodiment realizes the operations of initialization self-checking and the like of the BMS (battery management system) in the power-on process, so that the BMS (battery management system) can be matched with the VCU (vehicle control unit) and other peripheral components, and the BMS (battery management system) needs to be matched with the states of the VCU (vehicle control unit) and other components of the whole vehicle to control the components of the BMS by formulating a power-on strategy, and the components of the BMS can meet the use requirements of the whole vehicle. Self-checking can be performed in advance in the power-on process to reduce faults in the power-on process, and power-on operation is optimized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A power-up control method for a battery management system, the method comprising:
the battery management system detects whether the key signal is valid, whether the real-time clock is valid for awakening and whether the network message is received for awakening;
when the key signal is valid, the real-time clock is awakened to be valid and the network message is awakened to be valid, the battery management system reads the internal nonvolatile storage history fault, performs initialization operation and judges whether the initialization is successful;
the battery management system reports the awakening reason and the state to a whole vehicle network when the initialization is successful;
the battery management system judges whether a fault exists or not;
if the fault exists, the battery management system judges the grade of the fault;
when the level of the fault is high, the battery management system stops power-on operation;
when the level of the fault is low, the battery management system continues to be powered on;
the battery management system judges whether the battery management system detects that the key signal is invalid, whether the real-time clock is awakened to be invalid and whether the network message is awakened to be invalid;
if the battery management system detects that the key signal is not invalid, the real-time clock is awakened to be invalid and the network message is awakened to be invalid, the vehicle control unit sends a high-voltage power-on pre-charging instruction, the battery management system executes high-voltage pre-charging operation and judges whether the high-voltage pre-charging is finished within a specified time;
when the high-voltage pre-charging is completed within the specified time, the battery management system reports the state of the high-voltage relay to the whole vehicle network;
the battery management system performs high-voltage discharge.
2. The power-on control method of claim 1, wherein the high-voltage power-on timeout fault is reported when the high-voltage pre-charge is not completed within a specified time.
3. The power-on control method of the battery management system according to claim 1, wherein when initialization fails, an initialization failure flag is set to perform power-off operation.
4. A power-on control device of a battery management system, which is applied to the power-on control method of the battery management system according to any one of claims 1 to 3, and comprises a key signal receiving module, a clock module, a communication module, an execution module, a control module and a fault detection module;
the key signal receiving module is used for receiving a key signal, the clock module is used for acquiring a clock wake-up signal, and the communication module is used for acquiring network message wake-up;
the execution module is used for reading the history fault of the internal nonvolatile storage, carrying out initialization operation and judging whether the initialization is successful or not; the execution module is also used for executing power-on operation and reporting the state of the high-voltage relay to the whole vehicle network when the high-voltage pre-charging is completed within a specified time;
the fault detection module is used for judging whether a fault exists or not and determining whether to stop the power-on operation or not according to the grade of the fault;
the control module is used for sending a high-voltage power-on pre-charging instruction when the battery management system detects that the key signal is not invalid, the real-time clock is awakened to be invalid and the network message is awakened to be invalid, controlling the execution module to execute high-voltage pre-charging operation and judging whether the high-voltage pre-charging is finished within a specified time.
5. A power-on control device for a battery management system according to claim 4, wherein the communication module is further configured to enable the execution module to communicate with the vehicle network and to enable the execution module to communicate with the control module.
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| CN109591732B (en) * | 2019-01-09 | 2021-04-13 | 浙江吉利汽车研究院有限公司 | Automobile power-on control method and device, whole automobile controller and automobile |
| CN111823866A (en) * | 2019-04-19 | 2020-10-27 | 广州汽车集团股份有限公司 | Inspection control method and device for high-voltage power storage battery of electric automobile |
| CN110481386B (en) * | 2019-08-09 | 2024-04-05 | 中极氢能汽车(长治)有限公司 | Power-on and power-off control device for hydrogen energy vehicle with fuel-electricity hybrid automatic switching function |
| CN110646746B (en) * | 2019-09-29 | 2020-12-01 | 安徽江淮汽车集团股份有限公司 | Power supply driving fault test system and method |
| CN110834541B (en) * | 2019-11-15 | 2022-02-08 | 上海元城汽车技术有限公司 | Safety monitoring method and related device |
| CN111422098A (en) * | 2020-03-10 | 2020-07-17 | 深圳市德塔防爆电动汽车有限公司 | Safety management method and system for explosion-proof automobile battery |
| CN111413946B (en) * | 2020-03-23 | 2022-10-28 | 奇瑞新能源汽车股份有限公司 | New energy automobile driving motor controller fault clearing control method and structure |
| CN111619353B (en) * | 2020-05-26 | 2022-09-23 | 深圳天邦达科技有限公司 | State management method for automobile start-stop battery management system |
| CN112783140B (en) * | 2020-12-30 | 2022-05-10 | 广州橙行智动汽车科技有限公司 | System initialization method and device and vehicle |
| CN113386620A (en) * | 2021-06-03 | 2021-09-14 | 合肥国盛电池科技有限公司 | BMS intelligence battery management control system suitable for new forms of energy car |
| CN117048339A (en) * | 2023-10-13 | 2023-11-14 | 上海翼迅创能新能源科技有限公司 | High-voltage power distribution system power-on method of fuel cell counter-balanced forklift |
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