Lead-acid storage battery electric quantity monitoring and early warning method and system and Internet of Vehicles cloud platform

Abstract

The invention discloses a lead-acid storage battery electric quantity monitoring and early warning method and system and an Internet of Vehicles cloud platform. The method comprises the following steps: acquiring a power battery SOC, a vehicle power supply gear, a DCDC output voltage, a lead-acid storage battery voltage, a lead-acid storage battery current and an environment temperature of a vehicle in real time; under the condition that the vehicle power supply gear is changed from the ON gear to the OFF gear, whether the electric quantity of the lead-acid storage battery is abnormal or not is judged; under the condition that the electric quantity of the lead-acid storage battery is abnormal, if DCDC output voltage is smaller than first preset voltage within first preset time before the vehicle power supply gear is changed from an ON gear to an OFF gear, the abnormal reason is identified as low electric quantity of a power battery or a DCDC system fault, otherwise, the abnormal reason is identified as low electric quantity of the lead-acid storage battery or a lead-acid storage battery fault; and generating a corresponding prompt message according to the electric quantity abnormity reason and sending the prompt message to the mobile terminal. The method can accurately identify the electric quantity abnormity and abnormity reasons of the lead-acid storage battery, and guides a user to timely and correctly dispose a vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle safety, and particularly relates to a lead-acid battery power monitoring and warning method, system and vehicle networking cloud platform. Background Art

[0002] At present, the commonly used lead-acid battery power warning method in the industry is to perform warning by measuring the voltage or SOC of the lead-acid battery. The defect of this method is that it can only identify the current abnormal power of the lead-acid battery, and can remind the user that "the power of the lead-acid battery is abnormal", but it cannot judge whether the power is low or there is a fault, so it cannot accurately guide the user to perform charging or maintenance, which easily leads to the user not being able to dispose of it in time and correctly, and may cause the situation that the vehicle cannot start due to lack of power when the vehicle is needed, causing user complaints. Summary of the Invention

[0003] The purpose of the present invention is to provide a lead-acid battery power monitoring and warning method, system and vehicle networking cloud platform to accurately identify whether the power of the lead-acid battery is abnormal and the cause of the abnormality, and guide the user to dispose of the vehicle in time and correctly to avoid complaints.

[0004] In a first aspect, the present invention provides a lead-acid battery power monitoring and warning method, which includes: Obtain in real time the power battery SOC, vehicle power gear, DCDC output voltage, lead-acid battery voltage, lead-acid battery current and the ambient temperature where the vehicle is located sent by the vehicle end.

[0005] When the vehicle power gear changes from the ON gear to the OFF gear, judge whether the power of the lead-acid battery is abnormal based on the lead-acid battery voltage.

[0006] When the power of the lead-acid battery is abnormal, within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, if the DCDC output voltage is less than the first preset voltage, then identify the reason for the abnormal power of the lead-acid battery as low power of the power battery or DCDC system failure based on the power battery SOC.

[0007] When the power of the lead-acid battery is abnormal, within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, if the DCDC output voltage is greater than or equal to the first preset voltage, then identify the reason for the abnormal power of the lead-acid battery as low power of the lead-acid battery or lead-acid battery failure based on the ambient temperature where the vehicle is located and the lead-acid battery current.

[0008] Generate a corresponding prompt message according to the reason for the abnormal power of the lead-acid battery and send it to the mobile terminal (to remind the user to perform correct vehicle disposal in time).

[0009] Preferably, the method for judging whether the lead-acid battery power is abnormal based on the voltage of the lead-acid battery is as follows: Judge whether there is a situation where the lead-acid battery voltage is less than the second preset voltage and lasts for the second preset time within the first preset time after the vehicle power gear changes from the ON gear to the OFF gear (that is, whether there is a situation where the lead-acid battery voltage is continuously less than the second preset voltage for the second preset time); if so, it is determined that the lead-acid battery power is abnormal, otherwise it is determined that the lead-acid battery power is normal; where the second preset time is less than the first preset time.

[0010] Within the first preset time after the vehicle power gear changes from the ON gear to the OFF gear, various controllers, sensors, etc. on the vehicle are still in the working state and can upload the power battery SOC, vehicle power gear, DCDC output voltage, lead-acid battery voltage, lead-acid battery current, and vehicle ambient temperature to the vehicle networking cloud platform; after the first preset time when the vehicle power gear changes from the ON gear to the OFF gear, some of the controllers and sensors on the vehicle are in the sleep state and some are in the power-off state, and generally will not upload data to the vehicle networking cloud platform anymore. If the lead-acid battery power is normal, the lead-acid battery voltage will be greater than or equal to the second preset voltage after the vehicle power gear changes from the ON gear to the OFF gear. Therefore, the method of judging whether the lead-acid battery power is abnormal according to the magnitude and duration of the lead-acid battery voltage within the first preset time after the vehicle power gear changes from the ON gear to the OFF gear (excluding instantaneous fluctuation errors) is more accurate and reasonable.

[0011] Preferably, the method for identifying that the reason for the abnormal lead-acid battery power is low power battery power or DCDC system failure based on the power battery SOC is as follows: If the power battery SOC is less than or equal to the first preset SOC value within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, it is determined that the reason for the abnormal lead-acid battery power is low power battery power.

[0012] If the power battery SOC is greater than the first preset SOC value within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, it is determined that the reason for the abnormal lead-acid battery power is DCDC system failure.

[0013] Within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, if the DCDC output voltage is less than the first preset voltage, it means that the DCDC output voltage is small at this time. If the DCDC system has no fault, then the power battery SOC should also be small at this time. Therefore, according to the magnitude of the power battery SOC at this time, it can be judged whether the reason for the abnormal lead-acid battery power is low power battery power or DCDC system failure, and its judgment method is more accurate, reasonable and simple.

[0014] Preferably, the method for identifying the reason for the abnormal power of the lead-acid battery as low power of the lead-acid battery or a fault of the lead-acid battery based on the ambient temperature of the vehicle and the current of the lead-acid battery is as follows: According to the ambient temperature of the vehicle, query the preset correspondence table between the ambient temperature of the vehicle and the charging current threshold of the lead-acid battery to obtain the corresponding charging current threshold I of the lead-acid battery th .

[0015] Calculate the average value I of the lead-acid battery current within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear ve .

[0016] If I ve ≥I th , it is determined that the reason for the abnormal power of the lead-acid battery is low power of the lead-acid battery.

[0017] If I ve <I th , it is determined that the reason for the abnormal power of the lead-acid battery is a fault of the lead-acid battery.

[0018] Within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, if the DCDC output voltage is greater than or equal to the first preset voltage, it means that the DCDC output voltage is normal at this time. The voltage of the lead-acid battery is low after power consumption and needs to be charged; if the lead-acid battery has no fault, then it can be charged, and the lead-acid battery current will be greater than or equal to the charging current threshold I of the lead-acid battery th ; if the lead-acid battery has a fault, then the lead-acid battery cannot be charged, and the lead-acid battery current will be less than the charging current threshold I of the lead-acid battery th . Adding the need to exclude instantaneous fluctuation errors, so the average value of the lead-acid battery current within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear is used to judge whether the reason for the abnormal power of the lead-acid battery is low power of the lead-acid battery or a fault of the lead-acid battery, and its judgment method is more accurate, reasonable and simple.

[0019] Preferably, the first preset time is 3 min, and the first preset voltage is 13.5 V.

[0020] Preferably, the second preset voltage is 11.7 V, and the second preset time is 1 min.

[0021] Preferably, the method for generating a corresponding prompt message according to the reason for the abnormal power of the lead-acid battery and sending it to the mobile terminal is as follows: If the reason for the abnormal power of the lead-acid battery is low power of the power battery, generate a prompt message of "Please charge the vehicle in time" and send the prompt message to the mobile terminal to facilitate guiding the user to accurately and timely handle the vehicle.

[0022] If the reason for the abnormal power of the lead-acid battery is a DCDC system failure, a prompt message of "Please go to the maintenance service station to check the DCDC system" is generated and sent to the mobile terminal to facilitate guiding the user to accurately and timely handle the vehicle.

[0023] If the reason for the abnormal power of the lead-acid battery is that the power of the lead-acid battery is low, a prompt message of "Please charge the lead-acid battery in time" is generated and sent to the mobile terminal to facilitate guiding the user to accurately and timely handle the vehicle.

[0024] If the reason for the abnormal power of the lead-acid battery is a lead-acid battery failure, a prompt message of "Please go to the maintenance service station to replace the lead-acid battery" is generated and sent to the mobile terminal to facilitate guiding the user to accurately and timely handle the vehicle.

[0025] Preferably, the above lead-acid battery power monitoring and warning method further includes: sending the corresponding prompt message generated according to the reason for the abnormal power of the lead-acid battery to the vehicle end. When the vehicle is powered on next time, it can be displayed through the vehicle computer for the user to view, which can avoid the situation that the user fails to handle the vehicle in time due to not receiving the prompt message of the mobile terminal and can better avoid user complaints.

[0026] In a second aspect, the present invention provides an Internet of Vehicles cloud platform, which includes a cloud platform controller, and the cloud platform controller is configured to execute the above lead-acid battery power monitoring and warning method.

[0027] In a third aspect, the present invention provides a lead-acid battery power monitoring and warning system, which includes a vehicle end, a mobile terminal and the above Internet of Vehicles cloud platform, and the vehicle end and the mobile terminal are communicatively connected to the above Internet of Vehicles cloud platform.

[0028] The present invention uses the data within the first preset time before and after the vehicle power gear changes from the ON gear to the OFF gear for analysis, can accurately identify whether the power of the lead-acid battery is abnormal, and accurately identify the reason for the abnormality when the power of the lead-acid battery is abnormal, accurately guiding the user to timely and correctly handle the vehicle, avoiding user complaints caused by incorrect handling, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the lead-acid battery power monitoring and warning system in the embodiment of the present invention.

[0030] Figure 2 It is a flowchart of the lead-acid battery power monitoring and warning method in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to understand the features and technical content of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and explanation purposes and are not used to limit the embodiments of the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0033] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0034] As Figure 2 shown, the method for monitoring and warning the power of the lead-acid battery in the embodiments of the present invention is executed by the cloud platform controller and includes: Step 1: Real-time obtain the power battery SOC, vehicle power gear, DCDC output voltage, lead-acid battery voltage, lead-acid battery current, and vehicle ambient temperature sent by the vehicle end, and then execute Step 2.

[0035] Step 2: Determine whether the vehicle power gear changes from the ON gear to the OFF gear. If so, execute Step 3; otherwise, continue to execute Step 2.

[0036] Step 3: Determine whether there is a situation where the lead-acid battery voltage is less than the second preset voltage and lasts for the second preset time within the first preset time after the vehicle power gear changes from the ON gear to the OFF gear (that is, whether there is a situation where the lead-acid battery voltage is continuously less than the second preset voltage for the second preset time). If so, execute Step 5; otherwise, execute Step 4.

[0037] The first preset time, the second preset time, and the second preset voltage are all obtained through calibration. As an example, the first preset time is 3 min (i.e., 3 minutes), the second preset time is 1 min, and the second preset voltage is 11.7 V. Step 3 is exemplified as: determining whether there is a situation where the lead-acid battery voltage is continuously less than 11.7 V for 1 min within 3 min after the vehicle power gear changes from the ON gear to the OFF gear.

[0038] Step 4: Determine that the lead-acid battery power is normal, and then end.

[0039] Step 5: Determine that the lead-acid battery power is abnormal, and then execute Step 6.

[0040] Step 6: Determine whether the DCDC output voltage is less than the first preset voltage within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear. If yes, execute Step 7; otherwise, execute Step 12.

[0041] The first preset voltage is obtained through calibration. As an example, the first preset voltage is 13.5V. The example of Step 6 is: Determine whether the DCDC output voltage is less than 13.5V within 3 minutes before the vehicle power gear changes from the ON gear to the OFF gear.

[0042] Step 7: Determine whether the power battery SOC is less than or equal to the first preset SOC value within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear. If yes, execute Step 8; otherwise, execute Step 10.

[0043] The example of Step 7 is: Determine whether the power battery SOC is less than or equal to the first preset SOC value within 3 minutes before the vehicle power gear changes from the ON gear to the OFF gear. The first preset SOC value is obtained through calibration.

[0044] Step 8: Determine that the reason for the abnormal lead-acid battery power is the low power of the power battery, and then execute Step 9.

[0045] Step 9: Generate a prompt message of "Please charge the vehicle in time" and send the prompt message to the mobile terminal, and then end.

[0046] Step 10: Determine that the reason for the abnormal lead-acid battery power is the DCDC system failure, and then execute Step 11.

[0047] Step 11: Generate a prompt message of "Please go to the maintenance service station to check the DCDC system" and send the prompt message to the mobile terminal, and then end.

[0048] Step 12: According to the ambient temperature of the vehicle, query the preset corresponding relationship table between the ambient temperature of the vehicle and the charging current threshold of the lead-acid battery to obtain the corresponding charging current threshold I of the lead-acid battery th , and then execute Step 13. The preset corresponding relationship table between the ambient temperature of the vehicle and the charging current threshold of the lead-acid battery is obtained through calibration.

[0049] Step 13: Calculate the average value I of the lead-acid battery current within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear ve , and then execute Step 14. The example of Step 13 is: Calculate the average value I of the lead-acid battery current within 3 minutes before the vehicle power gear changes from the ON gear to the OFF gear ve (that is, by averaging the multiple lead-acid battery currents obtained within 3 minutes).

[0050] Step Fourteen: Determine whether I ve ≥I th . If yes, execute Step Fifteen; otherwise, execute Step Seventeen.

[0051] Step Fifteen: Determine that the reason for the abnormal power of the lead-acid battery is that the power of the lead-acid battery is low, and then execute Step Sixteen.

[0052] Step Sixteen: Generate a prompt message of "Please charge the lead-acid battery in time" and send the prompt message to the mobile terminal, and then end.

[0053] Step Seventeen: Determine that the reason for the abnormal power of the lead-acid battery is a lead-acid battery failure, and then execute Step Eighteen.

[0054] Step Eighteen: Generate a prompt message of "Please go to the maintenance service station to replace the lead-acid battery" and send the prompt message to the mobile terminal, and then end.

[0055] In some embodiments, the above lead-acid battery power monitoring and warning method further includes: sending the corresponding prompt message generated according to the reason for the abnormal power of the lead-acid battery to the vehicle end. When the vehicle is powered on next time, it can be displayed on the vehicle computer for the user to view, which can avoid the situation that the user fails to handle the vehicle in time due to not receiving the mobile terminal prompt message and can better avoid user complaints.

[0056] As Figure 1 shown, an embodiment of the present invention further provides an Internet of Vehicles cloud platform 2. The Internet of Vehicles cloud platform 2 includes a cloud platform controller, and the cloud platform controller is configured to execute the above lead-acid battery power monitoring and warning method.

[0057] At the same time, an embodiment of the present invention further provides a lead-acid battery power monitoring and warning system (see Figure 1 ), which includes a vehicle end 1, a mobile terminal 3, and the above Internet of Vehicles cloud platform 2. The vehicle end 1 and the mobile terminal 3 are communicatively connected to the Internet of Vehicles cloud platform 2. As an example, the mobile terminal is a mobile phone; in addition, the mobile terminal can also be a tablet computer or a smart watch, etc.

[0058] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A lead-acid battery power monitoring and early warning method, characterized in that: include: Real-time acquisition of the power battery SOC, vehicle power level, DCDC output voltage, lead-acid battery voltage, lead-acid battery current and vehicle ambient temperature sent by the vehicle end; When the vehicle power gear is changed from ON gear to OFF gear, judging whether the lead-acid battery power is abnormal based on the lead-acid battery voltage; In the case of abnormal power of the lead-acid battery, within a first preset time before the vehicle power gear changes from ON gear to OFF gear, if the DCDC output voltage is less than a first preset voltage, the abnormal power of the lead-acid battery is identified as low power of the power battery or a DCDC system failure based on the power battery SOC; In the case of abnormal power of the lead-acid battery, within a first preset time before the vehicle power gear changes from the ON gear to the OFF gear, if the DCDC output voltage is greater than or equal to the first preset voltage, the abnormal power of the lead-acid battery is identified as low power of the lead-acid battery or a lead-acid battery failure based on the ambient temperature of the vehicle and the current of the lead-acid battery; Generate a corresponding prompt message based on the cause of the abnormal power of the lead-acid battery and send it to the mobile terminal.

2. The lead-acid battery power monitoring and early warning method according to claim 1 is characterized in that: The method for judging whether the lead-acid battery power is abnormal based on the lead-acid battery voltage is: Determine whether there is a situation in which the lead-acid battery voltage is less than a second preset voltage and lasts for a second preset time within a first preset time after the vehicle power gear is changed from the ON gear to the OFF gear; If so, it is determined that the power of the lead-acid battery is abnormal, otherwise it is determined that the power of the lead-acid battery is normal; wherein the second preset time is less than the first preset time.

3. The lead-acid battery power monitoring and early warning method according to claim 1 is characterized in that: The method of identifying the abnormal power of the lead-acid battery based on the power battery SOC as low power battery or DCDC system failure is as follows: If the power battery SOC is less than or equal to the first preset SOC value within the first preset time before the vehicle power gear changes from the ON gear to the OFF gear, it is determined that the abnormal power of the lead-acid battery is caused by low power of the power battery; If the power battery SOC is greater than a first preset SOC value within a first preset time before the vehicle power gear changes from the ON gear to the OFF gear, it is determined that the abnormal power of the lead-acid battery is caused by a DCDC system failure.

4. The lead-acid battery power monitoring and early warning method according to claim 1 is characterized in that: The method of identifying the abnormal reason of lead-acid battery power as low lead-acid battery power or lead-acid battery failure based on the vehicle's ambient temperature and lead-acid battery current is as follows: According to the ambient temperature of the vehicle, the preset corresponding relationship table between the ambient temperature of the vehicle and the charging current threshold of the lead-acid battery is queried to obtain the corresponding charging current threshold I of the lead-acid battery th ; Calculate the average value I of the lead-acid battery current in the first preset time before the vehicle power gear changes from ON gear to OFF gear ve ; If I ve ≥I th , it is determined that the abnormality of the lead-acid battery power is caused by low lead-acid battery power; If I ve <I th , it is determined that the abnormal charge of the lead-acid battery is caused by a lead-acid battery failure.

5. The lead-acid battery power monitoring and early warning method according to claim 1 is characterized in that: The first preset time is 3 minutes, and the first preset voltage is 13.5V.

6. The lead-acid battery power monitoring and early warning method according to claim 2 is characterized in that: The second preset voltage is 11.7V, and the second preset time is 1 minute.

7. The lead-acid battery power monitoring and early warning method according to any one of claims 1 to 6, characterized in that: The method of generating a corresponding prompt message according to the abnormal cause of the lead-acid battery power and sending it to the mobile terminal is: If the abnormal power of the lead-acid battery is caused by low power of the power battery, a prompt message "Please charge the vehicle in time" is generated and sent to the mobile terminal; If the abnormal power of the lead-acid battery is caused by a DCDC system failure, a prompt message "Please go to a maintenance service station to check the DCDC system" is generated and sent to the mobile terminal; If the abnormality of the lead-acid battery power is caused by low lead-acid battery power, a prompt message "Please charge the lead-acid battery in time" is generated and sent to the mobile terminal; If the abnormal power of the lead-acid battery is caused by a lead-acid battery failure, a prompt message "Please go to a maintenance service station to replace the lead-acid battery" is generated and sent to the mobile terminal.

8. The lead-acid battery power monitoring and early warning method according to claim 7 is characterized in that: Also includes: The corresponding prompt message generated according to the cause of abnormal power of the lead-acid battery is sent to the vehicle end.

9. A vehicle networking cloud platform, including a cloud platform controller, characterized in that: The cloud platform controller is configured to execute the lead-acid battery power monitoring and early warning method as described in any one of claims 1 to 8.

10. A lead-acid battery power monitoring and early warning system, characterized in that: It comprises a vehicle end (1), a mobile terminal (3) and a vehicle networking cloud platform (2) as claimed in claim 9, wherein the vehicle end (1) and the mobile terminal (3) are communicatively connected with the vehicle networking cloud platform (2).

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