Power consumption scheduling control method for dynamically adjusting RTC awakening of truck lithium battery

Abstract

The invention discloses a power consumption scheduling control method for dynamically adjusting RTC awakening of a truck lithium battery. The power consumption scheduling control method comprises the following operation steps of 1, judging the state of the lithium battery; 2, continuously detecting an RTC interruption mark; 3, if the BMS judges that the lithium battery does not need to enter the dormancy state, returning to the step 1; if the BMS system judges that the lithium battery needs to enter dormancy, the BMS system enters a dormancy process, RTC interruption awakening is configured, and the next step is executed; step 4, performing partition configuration on the RTC interrupt wake-up time; 5, enabling the RTC to interrupt and wake up, and setting the RTC wake-up interrupt according to the RTC wake-up time; and step 6, RTC configuration is completed, BMS dormancy is started after 30 seconds, and the system is powered off. The method has the advantages that adaptive adjustment of the RTC wake-up period is realized by analyzing the internal voltage of the battery, and the standby power consumption of the system is reduced to the maximum extent on the premise of ensuring the safety of the battery.

Description

Technical Field

[0001] This invention relates to the field of truck lithium battery technology, and in particular to a power consumption scheduling control method for dynamically adjusting RTC wake-up in truck lithium batteries. Background Technology

[0002] With the development of the Internet of Things and intelligent transportation, modern trucks, especially electric trucks, are generally equipped with battery management systems (BMS).

[0003] This system is responsible for vehicle status monitoring, location uploading, remote diagnostics, and program upgrades. After the vehicle is turned off and put into sleep mode, the remote information processing system and other control units need to enter a low-power mode to save energy and reduce battery power consumption. At the same time, it is periodically woken up by the RTC timer inside the battery to execute preset tasks (such as data packet sending, status acquisition, etc.).

[0004] Currently, most truck lithium battery BMS management systems use a fixed-cycle RTC wake-up strategy. For example, regardless of the vehicle battery's state, the system is woken up every 30 minutes or 1 hour to perform communication tasks before entering sleep mode again. This fixed-cycle wake-up mechanism is simple to design and easy to implement.

[0005] However, it suffers from several drawbacks: First, it lacks adaptability to battery power. Fixed-cycle wake-ups cannot adapt to the dynamic changes in truck lithium batteries. When the battery is fully charged, frequent wake-ups do not cause problems, but when the battery is low due to long-term storage, low temperatures, or aging, frequent wake-ups and communication operations will continuously consume the already insufficient energy, easily leading to battery depletion and irreversible damage. Second, it has poor environmental adaptability. Lithium battery performance is significantly affected by temperature. In low-temperature environments, the battery's usable capacity and internal resistance change drastically. The fixed wake-up strategy cannot adaptively adjust according to ambient temperature, easily causing vehicles to fail to start in extremely cold regions. Third, it suffers from low energy efficiency. When the battery is in good condition, the BMS system can work more actively, providing more real-time data. However, when the battery is in poor condition, it should maximize the sleep time to conserve power. The fixed-cycle strategy cannot achieve this intelligent energy scheduling, resulting in low energy efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a power consumption scheduling control method for dynamically adjusting the RTC wake-up of a truck lithium battery. It has the advantage of adaptively adjusting the RTC wake-up cycle by analyzing the internal voltage of the battery, thereby minimizing the system's standby power consumption while ensuring battery safety.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A power consumption scheduling control method for dynamically adjusting RTC wake-up in a truck lithium battery includes the following steps: Step 1: Determine the state of the lithium battery, i.e., whether it is in a static state or not. If not in a static state, continue with step one; If the object remains stationary, proceed to the next step. Step 2: Continuously monitor the RTC interrupt flag; If an RTC interrupt flag exists, clear the RTC interrupt flag and then proceed to the next step; If no RTC interrupt flag is found, proceed directly to the next step. Step 3: If the BMS system determines that the lithium battery does not need to enter sleep mode, then return to Step 1. If the BMS system determines that the lithium battery needs to enter sleep mode, the BMS system enters the sleep process, configures the RTC interrupt to wake up the battery, and proceeds to the next step. Step 4: Configure RTC interrupt wake-up time partition; When the internal voltage of the lithium battery is lower than the low power consumption threshold, the RTC wake-up setting is invalid, and the lithium battery only responds to external button wake-up and charging wake-up. If the internal voltage of the lithium battery exceeds the normal operating voltage threshold, the RTC wake-up time is set to the baseline wake-up time, which is 30 minutes. When the internal voltage of the lithium battery exceeds the low-power entry total voltage threshold but is lower than the normal operating voltage threshold, the RTC wake-up time is set to twice the baseline wake-up time, i.e., 60 minutes. Step 5: Enable RTC interrupt wake-up and set the RTC wake-up interrupt according to the RTC wake-up time; Step six: RTC configuration complete. Wait 30 seconds to enter BMS hibernation and power off the system.

[0008] The preferred solution is as follows: Preferred: In step one, The stationary state means there is no charging or discharging current, the charging / discharging MOS is disconnected, and there is no strong start signal.

[0009] Preferred: In step four, The low-power input total voltage threshold for a 12V lithium battery is 12V, and for a 24V lithium battery it is 25.2V.

[0010] In summary, this invention has the advantages of extending battery life, reducing maintenance costs, improving overall vehicle reliability and performance, achieving high efficiency, enabling more efficient energy management, improving vehicle starting reliability and operational safety, and enhancing the system's intelligence and automation level. It also has extremely high cost-effectiveness and ease of implementation. Attached Figure Description

[0011] Figure 1 This is a flowchart of the lithium battery dynamic adjustment RTC wake-up process in the embodiment. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] A power consumption scheduling control method for dynamically adjusting RTC wake-up in a truck lithium battery includes the following steps: Step 1: Determine the state of the lithium battery, i.e., whether it is in a static state or not. If the object is not in a static state, continue with step one; When in a static state, there is no charging or discharging current, the charging / discharging MOS is disconnected, and there is no strong start signal, then proceed to the next step; Step 2: Continuously monitor the RTC interrupt flag; If an RTC interrupt flag exists, clear the RTC interrupt flag to prevent it from affecting the next RTC wake-up, and then proceed to the next step; If no RTC interrupt flag is found, proceed directly to the next step. Step 3: If the BMS system determines that the lithium battery does not need to enter sleep mode, then return to Step 1. If the BMS system determines that the lithium battery needs to enter sleep mode, the BMS system enters the sleep process, configures the RTC interrupt to wake up the battery, and proceeds to the next step. Step 4: Configure RTC interrupt wake-up time partition; When the internal voltage of the lithium battery is lower than the low-power entry total voltage threshold, the low-power entry total voltage threshold for a 12V lithium battery is 12V, and for a 24V lithium battery it is 25.2V. At this time, the RTC wake-up setting is invalid, and the lithium battery only responds to external button wake-up and charging wake-up. When the internal voltage of the lithium battery exceeds the normal operating voltage threshold, i.e., the low power consumption enters the total voltage threshold + 0.2V, the RTC wake-up time is set to the baseline wake-up time, which is 30 minutes. When the internal voltage of the lithium battery exceeds the low-power entry total voltage threshold but is lower than the normal operating voltage threshold, the RTC wake-up time is set to twice the baseline wake-up time, i.e., 60 minutes. Step 5: Enable RTC interrupt wake-up and set the RTC wake-up interrupt according to the RTC wake-up time; Step six: RTC configuration complete. Wait 30 seconds to enter BMS hibernation and power off the system.

[0014] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A power consumption scheduling control method for truck lithium battery dynamic adjustment RTC wake-up, characterized in that, The method comprises the following steps: Step one, judge the state of lithium battery, that is, static state and non-static state; If in non-static state, continue step one; If in static state, enter next step; Step two, continue to detect RTC interrupt flag; If there is RTC interrupt flag, clear the RTC interrupt flag, and then enter next step; If there is no RTC interrupt flag, directly enter next step; Step three, BMS system judges that lithium battery does not need to enter sleep, then return to step one; If BMS system judges that lithium battery needs to enter sleep, BMS system enters sleep flow, configures RTC interrupt wake-up, and enters next step; Step four, configure RTC interrupt wake-up time partition; If the internal voltage of lithium battery is lower than low-power entry total voltage threshold, at this time, RTC wake-up setting is invalid, lithium battery only responds to external button wake-up and charging wake-up; If the internal voltage of lithium battery exceeds normal working voltage threshold, at this time, RTC wake-up time is set as reference wake-up time, that is, 30 minutes; If the internal voltage of lithium battery exceeds low-power entry total voltage threshold and is lower than normal working voltage threshold, RTC wake-up time is set as twice reference wake-up time, that is, 60 minutes; Step five, enable RTC interrupt wake-up, and set RTC wake-up interrupt according to RTC wake-up time; Step six, after RTC configuration is completed, wait for 30 seconds to enter BMS sleep, and system is powered off.

2. The power consumption scheduling control method for truck lithium battery dynamic adjustment RTC wake-up according to claim 1, characterized in that: In step one, The static state is that there is no charging and discharging current, charging and discharging MOS is disconnected, and there is no strong enable signal.

3. The power consumption scheduling control method of truck lithium battery dynamic adjustment RTC wake-up according to claim 1, characterized in that: In step four, The low-power entry total voltage threshold of 12V lithium battery is 12V, and the low-power entry total voltage threshold of 24V lithium battery is 25.2V.

Images