CN116353411A - Battery system powering-on and powering-off method, device, equipment and medium - Google Patents
Battery system powering-on and powering-off method, device, equipment and medium Download PDFInfo
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- CN116353411A CN116353411A CN202310139153.3A CN202310139153A CN116353411A CN 116353411 A CN116353411 A CN 116353411A CN 202310139153 A CN202310139153 A CN 202310139153A CN 116353411 A CN116353411 A CN 116353411A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Abstract
The application discloses a battery system power-on and power-off method, device, equipment and medium, and relates to the technical field of automobiles. When the battery system is powered on, waking up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system so as to control and close each relay; sending a precharge relay disconnection instruction to a battery management system to disconnect the precharge relay so as to finish high-voltage power-on; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system so as to control the disconnection of the main positive relay and the main negative relay, and high-voltage power down is completed. Therefore, the control instructions of the relays are sequentially sent to the battery management system through the whole vehicle controller, the battery management system passively executes the instruction control of the whole vehicle controller, unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is achieved, the power-on time is shortened, and the reliability of the high-voltage power-on and power-off is guaranteed.
Description
Technical Field
The present disclosure relates to the field of automotive technologies, and in particular, to a method, an apparatus, a device, and a medium for powering on and powering off a battery system.
Background
At present, popularization and application of methanol in the field of heavy trucks are particularly important for development of new energy commercial vehicle industry. Methanol has become the cleanest, lowest carbon, most economical industrial development path due to obvious cost advantages. The methanol range-extending hybrid commercial vehicle uses a methanol engine carried range extender to charge a power battery, and meanwhile, the power battery can also provide power compensation for the power of the whole vehicle.
At present, when the vehicle is started, the whole vehicle controller (Vehicle Control Unit, VCU) only sends a high-voltage power-on instruction to the battery management system (Battery Management System, BMS), and after receiving the high-voltage power-on instruction sent by the VCU, the BMS autonomously controls each relay in the high-voltage box to act. This is unfavorable for VCU to do whole car power on management control, has certain security risk.
In view of the above-mentioned problems, how to implement the power on/off management control of the whole vehicle by the whole vehicle controller is a problem to be solved by those skilled in the art.
Disclosure of Invention
The purpose of the application is to provide a method, a device, equipment and a medium for powering up and down a battery system so as to realize the power-on management control of a whole vehicle controller on the whole vehicle.
In order to solve the technical problems, the application provides a battery system powering-on and powering-off method which is applied to a whole vehicle controller; the method comprises the following steps:
When the battery system is powered on, a VCU_Key signal is sent to the battery management system to wake up the battery management system;
sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed;
sending a precharge relay disconnection instruction to the battery management system for the battery management system to control the disconnection of the precharge relay so as to finish high-voltage electrifying;
and when the battery system is powered down, sending a main positive relay disconnection instruction to the battery management system so as to be used for controlling the battery management system to disconnect the main positive relay and the main negative relay, and completing high-voltage power down.
Preferably, before the sequentially sending the primary negative relay closing instruction, the pre-charging relay closing instruction and the primary positive relay closing instruction to the battery management system, after the sending the vcu_key signal to the battery management system to wake up the battery management system, the method further includes:
judging whether the self-check of the battery management system passes or not; the self-checking of the battery management system at least comprises relay adhesion detection, component pressure difference detection and main loop high-voltage circuit breaking detection;
If not, outputting alarm information and ending;
if yes, the method enters the step of sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system.
Preferably, after sending the primary negative relay closing instruction to the battery management system, the method further comprises:
judging whether the battery management system receives the main negative relay closing instruction within a first preset time;
if yes, the main negative relay is controlled to be closed through the battery management system;
if not, outputting the overtime information of the closing instruction of the main negative relay.
Preferably, sending the primary positive relay closing instruction to the battery management system includes:
when the battery management system controls to close the pre-charging relay, judging whether the rear end voltage value of the main positive relay is not smaller than the preset percentage of the front end voltage value of the main positive relay in a second preset time;
if yes, sending the main positive relay closing instruction to the battery management system;
if not, outputting the pre-charge failure alarm information and ending.
Preferably, after said sending a precharge relay off command to said battery management system, further comprising:
And receiving state information of each relay sent by the battery management system.
Preferably, the battery management system controlling to open the main positive relay and the main negative relay includes:
judging whether a bus current value of the battery system meets a first preset condition or not;
if the bus current value is determined to meet the first preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the first preset condition, judging whether a first preset accumulation time is reached;
if the first preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
and if the first preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets a first preset condition.
Preferably, the controlling to open the main positive relay and the main negative relay according to the bus current value includes:
judging whether the bus current value is not less than 0;
if yes, the main positive relay and the main negative relay are sequentially controlled to be disconnected through the battery management system;
And if not, the main negative relay and the main positive relay are sequentially controlled to be disconnected through the battery management system.
Preferably, before said sending the main positive relay disconnection instruction to the battery management system, the method further comprises:
judging whether the battery system has a fault of a preset level or not;
if yes, sending the main positive relay disconnection instruction to the battery management system, and judging whether a bus current value of the battery system meets a second preset condition or not;
if the bus current value is determined to meet the second preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the second preset condition, judging whether a second preset accumulation time is reached;
if the second preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
and if the second preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets a second preset condition.
Preferably, after the high-voltage power down is completed, the method further comprises:
Judging whether low-voltage power supply exists for the battery management system or not;
if so, a low-voltage power-down instruction is sent to the battery management system so as to power down the battery management system.
In order to solve the technical problems, the application also provides a battery system power-on and power-off device which is applied to the whole vehicle controller; the device comprises:
the first sending module is used for sending a VCU_Key signal to the battery management system when the battery system is electrified so as to wake up the battery management system;
the second sending module is used for sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed;
the third sending module is used for sending a pre-charging relay disconnection instruction to the battery management system so as to be used for controlling the battery management system to disconnect the pre-charging relay and finish high-voltage power-on;
and the fourth sending module is used for sending a main positive relay disconnection instruction to the battery management system when the battery system is powered down, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed.
In order to solve the above technical problem, the present application further provides a battery system power-on and power-off device, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the battery system power-on and power-off method when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, and the computer program when executed by a processor implements the steps of the above power-on and power-off method of the battery system.
The battery system powering-on and powering-off method is applied to the whole vehicle controller; when the battery system is powered on, the VCU_Key signal is sent to the battery management system to wake up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed; sending a precharge relay disconnection instruction to the battery management system so as to be used for disconnecting the precharge relay by the battery management system and completing high-voltage charging; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed. Therefore, the scheme sequentially sends the control instructions for the relays to the battery management system through the whole vehicle controller, and the battery management system passively executes instruction control of the whole vehicle controller, so that unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is realized, full pre-charging is ensured, and relay damage or component damage is avoided; meanwhile, the power-on time is shortened, and the reliability of high-voltage power-on and power-off is ensured.
In addition, the embodiment of the application also provides a battery system powering-on and powering-off device, equipment and medium, and the effects are the same as those of the battery system powering-on and powering-off device.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for powering up and powering down a battery system according to an embodiment of the present application;
fig. 2 is a schematic diagram of a power-on/off device of a battery system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a power-on and power-off device of a battery system according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
The core of the application is to provide a method, a device, equipment and a medium for powering up and down a battery system so as to realize the power-on management control of a whole vehicle controller on the whole vehicle.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
At present, when the vehicle is started, the whole vehicle controller only sends a high-voltage power-on instruction to the battery management system, and after the high-voltage power-on instruction sent by the whole vehicle controller is received, the battery management system automatically controls each relay in the high-voltage box to act. The whole vehicle controller is not beneficial to the whole vehicle power-on management control, and certain safety risks exist. Therefore, the embodiment of the application provides a battery system power-on and power-off method, which is applied to a vehicle controller.
Fig. 1 is a flowchart of a method for powering up and powering down a battery system according to an embodiment of the present application. As shown in fig. 1, the method includes:
s10: when the battery system is powered up, a VCU_Key signal is sent to the battery management system to wake up the battery management system.
It can be understood that the method for powering up and powering down the battery system in this embodiment is applied to the vehicle controller. The whole vehicle controller is used as a central control unit of the new energy automobile and is a core of the whole control system. The vehicle controller can collect motor and battery states, collect accelerator pedal signals, brake pedal signals, executors and sensor signals, and monitor the actions of the lower part controllers after making corresponding judgment according to the comprehensive analysis of the intention of a driver; the system is responsible for normal running of the automobile, braking energy feedback, energy management of a whole automobile driving system and a power battery, network management, fault diagnosis and treatment, vehicle state monitoring and the like, so that the normal and stable operation of the whole automobile under the conditions of better dynamic property, higher economical efficiency and reliability is ensured. The performance of the whole vehicle controller can be said to directly determine the whole vehicle performance of the new energy automobile, and the function of the medium-flow whetstone is achieved. Therefore, the vehicle controller is used for uniformly controlling the high-voltage power on of the whole vehicle, so that the safety of the vehicle can be effectively improved.
In a specific implementation, the low-voltage power supply is performed after the vehicle is started by a key, and each controller in the vehicle wakes up. When the battery system needs to be electrified, the whole vehicle controller sends a VCU_Key signal to the battery management system, and the battery management system is electrified to wake up and wait for a subsequent power-on instruction. It can be understood that in this embodiment, the battery management system realizes the closing control of each high-voltage relay of the whole vehicle.
S11: and sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed.
Further, the vehicle controller sequentially sends a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls to close the main negative relay according to the main negative relay closing instruction, controls to close the pre-charging relay according to the pre-charging relay closing instruction, and controls to close the main positive relay according to the main positive relay closing instruction.
The main negative relay closing instruction, the pre-charging relay closing instruction and the main positive relay closing instruction which are sequentially sent by the whole vehicle controller are contained in a message sent by the whole vehicle controller to the battery management system. The message ID is 0x1802F3D0, which contains information of 8 BYTE (BYTE 0-BYTE 7). And control instructions for the main negative relay, the pre-charge relay and the main positive relay are stored in BYTE 7. In BYTE7, bits 0-1 store the main positive relay control instruction: 0 is reserved, 1 is opened, 2 is closed, and 3 is invalid; bit 2-3 stores the main negative relay control instruction: 0 is reserved, 1 is opened, 2 is closed, and 3 is invalid; bit 4-5 stores the precharge relay control instruction: 0 is reserved, 1 is opened, 2 is closed, and 3 is invalid; bit 6-7 is reserved. In a specific implementation, the battery management system obtains control instructions for each relay through a message.
It should be noted that, in this embodiment, the sending of the closing instructions to the main negative relay, the pre-charging relay, and the main positive relay, and the control of the closing need to be performed sequentially, so as to achieve sequential closing of the relays and the pre-charging action to the battery management system.
S12: and sending a precharge relay disconnection instruction to the battery management system for controlling the battery management system to disconnect the precharge relay so as to finish high-voltage charging.
And finally, the whole vehicle controller sends a pre-charging relay disconnection instruction to the battery management system so as to be used for disconnecting the pre-charging relay by the battery management system, thereby completing high-voltage power-on and enabling the battery management system to enter a normal discharging state.
S13: when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed.
And when the battery system is powered down, the whole vehicle controller sends a main positive relay disconnection instruction to the battery management system. And the battery management system controls to disconnect the main positive relay and the main negative relay after receiving the main positive relay disconnection instruction, so that high-voltage reduction is completed. It should be noted that the opening sequence of the main positive relay and the main negative relay is not limited in this embodiment, and depends on the specific implementation.
In this embodiment, when the battery system is powered on, the vcu_key signal is sent to the battery management system to wake up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed; sending a precharge relay disconnection instruction to the battery management system so as to be used for disconnecting the precharge relay by the battery management system and completing high-voltage charging; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed. Therefore, the scheme sequentially sends the control instructions for the relays to the battery management system through the whole vehicle controller, and the battery management system passively executes instruction control of the whole vehicle controller, so that unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is realized, full pre-charging is ensured, and relay damage or component damage is avoided; meanwhile, the power-on time is shortened, and the reliability of high-voltage power-on and power-off is ensured.
In order to ensure the normal operation of the battery management system and the normal power-up of the whole vehicle, as a preferred embodiment, before sequentially sending the main negative relay closing instruction, the pre-charging relay closing instruction and the main positive relay closing instruction to the battery management system, after sending the vcu_key signal to the battery management system to wake up the battery management system, the method further includes:
judging whether the self-check of the battery management system passes or not; the self-checking of the battery management system at least comprises relay adhesion detection, component differential pressure detection and main loop high-voltage circuit breaking detection;
if not, outputting alarm information and ending;
if yes, the method enters a step of sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system.
In a specific implementation, the battery management system turns on self-test after power is applied. The self-detection of the battery management system at least comprises relay adhesion detection, component differential pressure detection and main loop high-voltage circuit breaking detection, and can also comprise insulation fault detection, intranet communication fault detection and the like. In this embodiment, the specific detection content included in the self-test of the battery management system is not limited, and depends on the specific implementation. If the detection item in the self-check of the battery management system fails, the battery management system is considered to have a fault at the moment, alarm information is output to prompt, and the whole vehicle high-voltage power-on flow is ended; if all detection items pass in the self-check of the battery management system, the battery management system is considered to be normal at the moment, and a subsequent high-voltage power-on process can be performed.
In the embodiment, whether the self-check of the battery management system passes or not is judged; the self-checking of the battery management system at least comprises relay adhesion detection, component differential pressure detection and main loop high-voltage circuit breaking detection; if not, outputting alarm information and ending; if yes, the method enters a step of sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system. The normal operation of the battery management system and the normal power-on process of the whole vehicle are ensured.
In order to make the vehicle controller determine the response situation of the battery management system after sending each relay closing instruction to the battery management system, the above embodiment is a preferred embodiment, after sending the main negative relay closing instruction to the battery management system, further including:
judging whether the battery management system receives a main negative relay closing instruction within a first preset time;
if yes, the main negative relay is controlled to be closed through the battery management system;
if not, outputting the overtime information of the closing instruction of the main negative relay.
Specifically, the vehicle control unit first sends a main negative relay closing instruction to the battery management system. After sending the main negative relay closing instruction to the battery management system, the whole vehicle controller judges whether the battery management system receives the main negative relay closing instruction within a first preset time. If yes, the main negative relay is controlled to be closed through the battery management system; if not, outputting the overtime information of the closing instruction of the main negative relay, and ending the power-on process. It should be noted that, in this embodiment, the first preset time is not limited, and depends on the specific implementation. Preferably, the first preset time may be 2s.
Similarly, after sending the pre-charging relay closing instruction to the battery management system, the battery management system can also judge whether the pre-charging relay closing instruction is received in a first preset time; if yes, the battery management system controls the closing of the pre-charging relay; if not, outputting the overtime information of the closing instruction of the pre-charging relay. Further after sending the main positive relay closing instruction to the battery management system, judging whether the battery management system receives the main positive relay closing instruction within a first preset time; if yes, closing the main positive relay through the battery management system; if not, outputting the overtime information of the closing instruction of the main positive relay.
In addition, after the precharge relay disconnection instruction is sent to the battery management system, a preset time can be set to judge whether the battery management system receives the precharge relay disconnection instruction. Therefore, the overtime information prompts the vehicle controller battery management system to receive the overtime instruction, so that the vehicle controller is ensured to grasp the execution condition of each relay instruction.
In order to control the front-rear differential pressure of the main positive relay, as a preferred embodiment, the sending the main positive relay closing command to the battery management system includes:
When the battery management system controls to close the pre-charging relay, judging whether the rear end voltage value of the main positive relay is not smaller than the preset percentage of the front end voltage value of the main positive relay in the second preset time;
if yes, sending a main positive relay closing instruction to a battery management system;
if not, outputting the pre-charge failure alarm information and ending.
In a specific implementation, in order to control the front-rear voltage difference of the main positive relay in the power-on process, as a preferred embodiment, when the battery management system controls to close the pre-charging relay, whether the back-end voltage value (HVP) of the main positive relay is not less than the preset percentage of the front-end voltage value (HVB) of the main positive relay in the second preset time is judged; if yes, sending a main positive relay closing instruction to a battery management system; if not, outputting the pre-charge failure alarm information and ending.
It should be noted that the preset percentage is not limited in this embodiment, and depends on the specific implementation. Typically, the vehicle voltage platform is 630V or so, and the preset percentage may be 98% as a preferred embodiment in order to control the front-to-back differential pressure to be within 30V.
In addition, the second preset time is not limited in this embodiment, and depends on the specific implementation. Preferably, the second preset time may be set to 3s.
In order to enable the vehicle controller to acquire the state of each relay after the power-up is completed, in addition to the above embodiment, as a preferred embodiment, after sending the precharge relay off command to the battery management system, the method further includes:
and receiving state information of each relay sent by the battery management system.
It can be understood that the state information of each relay includes each information of the state (reserved, open, closed, invalid) of the main negative relay, the state (reserved, open, closed, invalid) of the pre-charging relay and the state (reserved, open, closed, invalid) of the main positive relay, and the state of each relay can be accurately known by the vehicle controller through the information, so that the vehicle control is better realized.
On the basis of the above-described embodiments, as a preferred embodiment, the battery management system controlling to open the main positive relay and the main negative relay includes:
judging whether a bus current value of the battery system meets a first preset condition or not;
if the bus current value is determined to meet the first preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the first preset condition, judging whether the first preset accumulation time is reached or not;
If the first preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the first preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets the first preset condition.
In a specific implementation, after the battery management system receives a main positive relay disconnection instruction sent by the whole vehicle controller, the battery management system controls to disconnect the main positive relay and the main negative relay. Firstly, the battery management system judges the bus current of the battery system, and specifically judges whether the bus current value meets a first preset condition. The first preset condition is not limited in this embodiment, and depends on the specific implementation. Preferably, the first preset condition may be that an absolute value of the bus current value is not more than 30A and the duration is 400ms. When the first preset condition is met, each electric device of the vehicle is normal in function, the normal high-voltage flow is carried out, and the main positive relay and the main negative relay are further controlled to be disconnected according to the bus current value. And when the first preset condition is not met, judging whether the first preset accumulation time is reached. In this embodiment, the first preset accumulation time is not limited, and depends on the specific implementation. Preferably, the first preset accumulation time may be 10s. When the accumulated time reaches a first preset accumulated time, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value, namely, a subsequent power-down flow is carried out; if the first preset accumulation time is not reached, returning to the previous step, and judging whether the bus current value of the battery system meets the first preset condition again.
In the embodiment, through setting the judgment on whether the first preset condition is met, the relay is disconnected under the premise of safety and reliability, and the relay is prevented from being stuck under the condition of high current when the relay is disconnected;
in a specific implementation, as a preferred embodiment, the controlling to turn off the main positive relay and the main negative relay according to the bus current value includes:
judging whether the bus current value is not less than 0;
if yes, the main positive relay and the main negative relay are sequentially controlled to be disconnected through the battery management system;
if not, the main negative relay and the main positive relay are sequentially controlled to be disconnected through the battery management system.
Specifically, in the process of controlling the opening of the main positive relay and the main negative relay by the battery management system, it is necessary to determine the bus current value. When the bus current value is greater than or equal to 0, the main positive relay and the main negative relay are sequentially controlled to be disconnected through the battery management system; when the bus current value is smaller than 0, the main negative relay and the main positive relay are sequentially controlled to be disconnected through the battery management system. The reasonable distribution of the disconnection sequence of the main negative relay and the main positive relay is realized.
On the basis of the above embodiment, in order to ensure driving safety and normal operation of the battery system, before sending the main positive relay disconnection instruction to the battery management system, the method further includes:
Judging whether a fault of a preset level occurs in the battery system or not;
if yes, sending a main positive relay disconnection instruction to a battery management system, and judging whether a bus current value of the battery system meets a second preset condition;
if the bus current value is determined to meet the second preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the second preset condition, judging whether the second preset accumulation time is reached or not;
if the second preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the second preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets the second preset condition.
Specifically, after the battery system is powered on, judging whether the battery system has a fault of a preset level; if yes, the power-down flow of the battery system is not required to be started actively, and the whole vehicle controller sends a main positive relay disconnection instruction to the battery management system to carry out the subsequent power-down flow. In this embodiment, the possible faults and the corresponding preset levels are not limited, and depend on the specific implementation. As a preferred embodiment, the faults can be classified into three levels in the whole vehicle fault level setting: the primary fault plays a role in warning and does not process, the secondary fault whole vehicle limits 50% of power, and the tertiary fault whole vehicle walks a high-voltage power down flow, namely when the tertiary fault occurs, a main positive relay disconnection instruction is sent to a battery management system.
When the battery management system receives the main positive relay disconnection instruction, whether the bus current value of the battery system meets a second preset condition or not needs to be judged. The second preset condition is not limited in this embodiment, and depends on the specific implementation. Preferably, the second preset condition may be set such that an absolute value of the bus current value is not more than 30A for 10s. If the bus current value is determined to meet the second preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value; the main positive relay and the main negative relay may be disconnected in the same manner as in the above-described embodiment. If the bus current value is determined to not meet the second preset condition, judging whether the second preset accumulation time is reached or not; the second preset accumulation time is not limited in this embodiment, and depends on the specific implementation. Since the current down-stroke at this time is based on the occurrence of a malfunction affecting the driving safety of the vehicle, as a preferred embodiment, the second preset accumulation time may be set to 35s here to reserve a reaction time for the driver, preventing the steering from losing control after abnormal high-voltage down-stroke from affecting the driving safety. Further, if the second preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value; if the second preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets the second preset condition so as to continue to judge.
In this embodiment, by judging whether the battery system has a fault of a preset level and judging whether the bus current value meets the second preset condition, high-voltage reduction under abnormal conditions is realized, and driving safety is ensured.
On the basis of the above embodiment, as a preferred embodiment, in order to completely power down the battery management system, after completing the high-voltage reduction, it further includes:
judging whether low-voltage power supply to a battery management system exists or not;
if so, a low-voltage power-down instruction is sent to the battery management system so as to power down the battery management system.
Specifically, after the battery management system finishes high-voltage power down, when the whole vehicle controller determines that low-voltage power supply to the battery management system exists, a low-voltage power down instruction is sent to the battery management system, so that the battery management system is completely powered down, and the power consumption of the battery system is saved.
In the above embodiments, the method for powering up and powering down the battery system is described in detail, and the application further provides a corresponding embodiment of the device for powering up the battery system.
Fig. 2 is a schematic diagram of a power-on/off device of a battery system according to an embodiment of the present application. The device is applied to a whole vehicle controller; as shown in fig. 2, the battery system power-on/power-off device includes:
The first sending module 10 is configured to send a vcu_key signal to the battery management system when the battery system is powered on, so as to wake up the battery management system.
The second sending module 11 is configured to send the main negative relay closing instruction, the pre-charging relay closing instruction, and the main positive relay closing instruction to the battery management system in sequence, so that the battery management system is used to control the main negative relay, the pre-charging relay, and the main positive relay to be closed in sequence.
A third sending module 12, configured to send a precharge relay disconnection instruction to the battery management system, so that the battery management system controls to disconnect the precharge relay, and complete the high-voltage power-on;
and the fourth sending module 13 is used for sending a main positive relay disconnection instruction to the battery management system when the battery system is powered down, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed.
In this embodiment, the battery system power-on device includes a first transmission module, a second transmission module, a third transmission module, and a fourth transmission module. The battery system powering-on device can realize all the steps of the battery system powering-on and powering-off method when in operation. When the battery system is powered on, the VCU_Key signal is sent to the battery management system to wake up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed; sending a precharge relay disconnection instruction to the battery management system so as to be used for disconnecting the precharge relay by the battery management system and completing high-voltage charging; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed. Therefore, the scheme sequentially sends the control instructions for the relays to the battery management system through the whole vehicle controller, and the battery management system passively executes instruction control of the whole vehicle controller, so that unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is realized, full pre-charging is ensured, and relay damage or component damage is avoided; meanwhile, the power-on time is shortened, and the reliability of high-voltage power-on and power-off is ensured.
Fig. 3 is a schematic diagram of a power-on and power-off device of a battery system according to an embodiment of the present application. As shown in fig. 3, the battery system power-on apparatus includes:
a memory 20 for storing a computer program.
The processor 21 is configured to implement the steps of the battery system power-on/power-off method as mentioned in the above embodiment when executing the computer program.
The battery system power-on device provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, DSP), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a graphics processor (Graphics Processing Unit, GPU) for use in connection with rendering and rendering of content to be displayed by the display screen. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, where the computer program, when loaded and executed by the processor 21, can implement the relevant steps of the battery system power-up and power-down method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, data related to a battery system power-up and power-down method.
In some embodiments, the battery system powered device may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
Those skilled in the art will appreciate that the configuration shown in fig. 3 is not limiting of the battery system powered device and may include more or fewer components than shown.
In this embodiment, a battery system powered device includes a memory and a processor. The memory is used for storing a computer program. The processor is configured to implement the steps of the battery system power-up and power-down method as mentioned in the above embodiments when executing the computer program. When the battery system is powered on, the VCU_Key signal is sent to the battery management system to wake up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed; sending a precharge relay disconnection instruction to the battery management system so as to be used for disconnecting the precharge relay by the battery management system and completing high-voltage charging; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed. Therefore, the scheme sequentially sends the control instructions for the relays to the battery management system through the whole vehicle controller, and the battery management system passively executes instruction control of the whole vehicle controller, so that unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is realized, full pre-charging is ensured, and relay damage or component damage is avoided; meanwhile, the power-on time is shortened, and the reliability of high-voltage power-on and power-off is ensured.
Finally, the present application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this embodiment, a computer program is stored on a computer readable storage medium, and when the computer program is executed by a processor, the steps described in the above method embodiments are implemented. When the battery system is powered on, the VCU_Key signal is sent to the battery management system to wake up the battery management system; sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to a battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed; sending a precharge relay disconnection instruction to the battery management system so as to be used for disconnecting the precharge relay by the battery management system and completing high-voltage charging; when the battery system is powered down, a main positive relay disconnection instruction is sent to the battery management system, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed. Therefore, the scheme sequentially sends the control instructions for the relays to the battery management system through the whole vehicle controller, and the battery management system passively executes instruction control of the whole vehicle controller, so that unified control of the high-voltage relays of the whole vehicle in the power-on and power-off process is realized, full pre-charging is ensured, and relay damage or component damage is avoided; meanwhile, the power-on time is shortened, and the reliability of high-voltage power-on and power-off is ensured.
The battery system power-on and power-off method, device, equipment and medium provided by the application are described in detail above. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (12)
1. The battery system power-on and power-off method is characterized by being applied to a whole vehicle controller; the method comprises the following steps:
when the battery system is powered on, a VCU_Key signal is sent to the battery management system to wake up the battery management system;
sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed;
sending a precharge relay disconnection instruction to the battery management system for the battery management system to control the disconnection of the precharge relay so as to finish high-voltage electrifying;
and when the battery system is powered down, sending a main positive relay disconnection instruction to the battery management system so as to be used for controlling the battery management system to disconnect the main positive relay and the main negative relay, and completing high-voltage power down.
2. The battery system power-up and power-down method of claim 1, further comprising, after said sending a vcu_key signal to a battery management system to wake up said battery management system, before said sequentially sending a master negative relay close command, a pre-charge relay close command, and a master positive relay close command to said battery management system:
Judging whether the self-check of the battery management system passes or not; the self-checking of the battery management system at least comprises relay adhesion detection, component pressure difference detection and main loop high-voltage circuit breaking detection;
if not, outputting alarm information and ending;
if yes, the method enters the step of sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system.
3. The battery system power-up and power-down method according to claim 1, further comprising, after transmitting the main negative relay closing instruction to the battery management system:
judging whether the battery management system receives the main negative relay closing instruction within a first preset time;
if yes, the main negative relay is controlled to be closed through the battery management system;
if not, outputting the overtime information of the closing instruction of the main negative relay.
4. The battery system power-up and power-down method of claim 1, wherein sending the primary positive relay closing instruction to the battery management system comprises:
when the battery management system controls to close the pre-charging relay, judging whether the rear end voltage value of the main positive relay is not smaller than the preset percentage of the front end voltage value of the main positive relay in a second preset time;
If yes, sending the main positive relay closing instruction to the battery management system;
if not, outputting the pre-charge failure alarm information and ending.
5. The battery system power-up and power-down method according to claim 1, further comprising, after said sending a precharge relay off instruction to the battery management system:
and receiving state information of each relay sent by the battery management system.
6. The battery system power-up and power-down method of claim 1, wherein the battery management system controlling to open the main positive relay and the main negative relay comprises:
judging whether a bus current value of the battery system meets a first preset condition or not;
if the bus current value is determined to meet the first preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the first preset condition, judging whether a first preset accumulation time is reached;
if the first preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
and if the first preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets a first preset condition.
7. The battery system power-on and power-off method according to claim 6, wherein the controlling to turn off the main positive relay and the main negative relay according to the bus current value comprises:
judging whether the bus current value is not less than 0;
if yes, the main positive relay and the main negative relay are sequentially controlled to be disconnected through the battery management system;
and if not, the main negative relay and the main positive relay are sequentially controlled to be disconnected through the battery management system.
8. The battery system power-up and power-down method according to claim 1, further comprising, before said sending a main positive relay-off instruction to the battery management system:
judging whether the battery system has a fault of a preset level or not;
if yes, sending the main positive relay disconnection instruction to the battery management system, and judging whether a bus current value of the battery system meets a second preset condition or not;
if the bus current value is determined to meet the second preset condition, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
if the bus current value is determined to not meet the second preset condition, judging whether a second preset accumulation time is reached;
If the second preset accumulation time is reached, the main positive relay and the main negative relay are controlled to be disconnected according to the bus current value;
and if the second preset accumulation time is not reached, returning to the step of judging whether the bus current value of the battery system meets a second preset condition.
9. The battery system powering-up and powering-down method according to any one of claims 1 to 8, characterized by further comprising, after completion of the high-voltage powering-down:
judging whether low-voltage power supply exists for the battery management system or not;
if so, a low-voltage power-down instruction is sent to the battery management system so as to power down the battery management system.
10. The battery system powering-on and powering-off device is characterized by being applied to a whole vehicle controller; the device comprises:
the first sending module is used for sending a VCU_Key signal to the battery management system when the battery system is electrified so as to wake up the battery management system;
the second sending module is used for sequentially sending a main negative relay closing instruction, a pre-charging relay closing instruction and a main positive relay closing instruction to the battery management system, so that the battery management system sequentially controls the main negative relay, the pre-charging relay and the main positive relay to be closed;
The third sending module is used for sending a pre-charging relay disconnection instruction to the battery management system so as to be used for controlling the battery management system to disconnect the pre-charging relay and finish high-voltage power-on;
and the fourth sending module is used for sending a main positive relay disconnection instruction to the battery management system when the battery system is powered down, so that the battery management system is used for controlling the main positive relay and the main negative relay to be disconnected, and high-voltage power down is completed.
11. A battery system power-on and power-off apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the battery system power-up and power-down method according to any one of claims 1 to 9 when executing the computer program.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the battery system power-up and power-down method according to any of claims 1 to 9.
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| CN202310139153.3A CN116353411A (en) | 2023-02-10 | 2023-02-10 | Battery system powering-on and powering-off method, device, equipment and medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310139153.3A CN116353411A (en) | 2023-02-10 | 2023-02-10 | Battery system powering-on and powering-off method, device, equipment and medium |
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