New energy automobile power battery monomer under-voltage early warning control system and control method

Abstract

The invention provides a new energy automobile power battery monomer undervoltage early warning control system and control method, and belongs to the technical field of automobile battery undervoltage early warning, and the system comprises a battery management system, an instrument panel, a vehicle communication module and an early warning module. The battery management system outputs state information of a battery to the vehicle communication module, the instrument panel outputs mileage data of the vehicle to the vehicle communication module, and the vehicle communication module outputs the state information of the battery and the mileage data of the vehicle to the early warning module. The early warning module detects whether the under-voltage alarm information of the single battery is the under-voltage first-level alarm information, and if the under-voltage alarm information of the single battery is the under-voltage first-level alarm information of the single battery, countdown is started according to set countdown time. And if the countdown is cut off, the under-voltage first-level alarm state of the single battery does not jump, and the early warning module triggers the platform for early warning. The voltage of the single automobile battery is monitored, a user is notified in time, and the influence of undervoltage on automobile use and automobile safety is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile battery undervoltage warning, and in particular, the present invention relates to a new energy vehicle power battery monomer undervoltage warning control system and control method. Background Art

[0002] With the development of intelligent, connected, and electrified new energy vehicles, national and enterprise platforms are gradually strengthening vehicle-side data monitoring and processing of 19 national standard alarm data to promptly notify users or address vehicle issues in the depot. Battery cell undervoltage is a concern in the automotive industry. On the one hand, battery cell undervoltage can cause thermal runaway, posing risks to both the vehicle and the user. On the other hand, excessive vehicle discharge can lead to battery cell undervoltage and battery depletion, which in turn reduces the battery's energy storage capacity and shortens the vehicle's range.

[0003] Chinese patent 116973782B discloses a new energy vehicle maintenance and fault monitoring and diagnosis method based on machine learning, which relates to the field of new energy vehicle technology and includes the following steps: collecting information about the on-board battery of the new energy vehicle when it is in use, including battery capacity information and on-board BMS accuracy information; after the collection, establishing an on-board battery information evaluation model based on the battery capacity information and on-board BMS accuracy information of the on-board battery of the new energy vehicle when it is in use, and generating an on-board battery information evaluation index.

[0004] The existing technology does not detect the undervoltage fault of the battery cell in a timely manner, which may cause the vehicle to be prone to undervoltage faults and safety problems. Summary of the Invention

[0005] The present invention aims to provide a new energy vehicle power battery monomer undervoltage warning control system and control method, so as to achieve real-time monitoring of the voltage of the vehicle battery monomer and promptly notify the user to avoid undervoltage affecting vehicle use and vehicle safety.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a new energy vehicle power battery cell undervoltage warning control system, comprising a battery management system, an instrument panel, a vehicle communication module and a warning module, wherein the output end of the instrument panel is connected to the input end of the vehicle communication module, the output end of the battery management system is connected to the input end of the vehicle communication module, and the output end of the vehicle communication module is connected to the input end of the warning module.

[0008] The battery management system outputs battery status information to the vehicle communication module, the instrument panel outputs vehicle mileage data to the vehicle communication module, and the vehicle communication module outputs battery status and vehicle mileage data to the early warning module.

[0009] The vehicle communication module adopts a telematics processor (T-BOX).

[0010] The battery management system is connected to the telematics processor (T-BOX) via a CAN bus, and the instrument panel is connected to the telematics processor (T-BOX) via a CAN bus.

[0011] The early warning module adopts a cloud server.

[0012] The telematics processor (T-BOX) is connected to the cloud server via a wireless network.

[0013] The present invention provides a control method for a new energy vehicle power battery cell undervoltage warning control system:

[0014] Step 1: The battery management system outputs the battery status information to the vehicle communication module, the instrument panel outputs the vehicle mileage data to the vehicle communication module, and the vehicle communication module outputs the battery status information and vehicle mileage data to the early warning module;

[0015] Step 2: The early warning module detects whether the undervoltage alarm information of the battery cell is a level 1 undervoltage alarm information. If it is not a level 1 undervoltage alarm information of the battery cell, the early warning module does not proceed to the next step; if it is a level 1 undervoltage alarm information of the battery cell, the countdown starts according to the set countdown time;

[0016] Step 3: If the countdown ends and the battery cell's undervoltage level 1 alarm status does not change, the warning module triggers a platform warning.

[0017] In step 1, the battery management system outputs battery cell status information including battery cell voltage data, battery cell serial number, battery cell undervoltage alarm, vehicle battery charge state and vehicle battery health state.

[0018] In step 2, after the countdown starts, the undervoltage level 1 alarm state of the battery cell changes to the normal state, the undervoltage level 2 alarm state or the undervoltage level 3 alarm state, the countdown ends, and the early warning module re-detects whether the battery cell is in the undervoltage level 1 alarm state.

[0019] In step three, the vehicle enters a dormant state at the start of the countdown or during the countdown, and if it is still in the dormant state at the end of the countdown, the warning module triggers a platform warning.

[0020] The technical effects of the present invention are:

[0021] (1) The present invention monitors the voltage and fault signals of vehicle battery cells, and promptly reminds users to charge their vehicles to avoid over-discharge, which may affect vehicle starting or driving. By identifying existing or potential risks in the vehicle, the present invention provides early warning and timely processing of battery cells before the national standard alarm occurs, which can reduce the number of fault alarms, reduce the national platform alarm data, and improve the efficiency of problem handling.

[0022] (2) This invention enhances the brand image. By providing a single-cell undervoltage warning, users can be prompted to promptly pay attention to and repair the vehicle battery, effectively identifying problems and reducing repair costs. In addition, along with other fault warnings, it can more effectively reduce the number of Level 3 alarm data on the national platform, thereby reducing the number of faults to be handled by the national platform each year and enhancing the brand image.

[0023] (3) The present invention has low cost and good versatility, does not involve changes to software or hardware, and does not require additional costs. It only takes and processes the entire vehicle data through the enterprise platform, and the amount of changes is relatively small. It is applicable to the single-unit undervoltage warning of all new energy vehicles of the enterprise.

[0024] (4) The present invention has high processing efficiency. The longest time for battery cell undervoltage to occur is only 24 hours. The early warning module or after-sales service personnel can remind the user to go to the station for processing in time, avoiding the occurrence of secondary / tertiary faults due to untimely processing, which will cause more serious consequences to the user, generate more maintenance costs, and waste more time.

[0025] (5) The present invention avoids the occurrence of thermal runaway failures, which are more likely to occur due to undervoltage of battery cells. By monitoring and processing vehicle data through the enterprise platform, the causes of thermal runaway can be effectively reduced, the occurrence of another national standard alarm can be reduced, and the health of the vehicle battery and the endurance of the entire vehicle can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] This manual includes the following drawings, which show the following contents:

[0027] Figure 1 This is a logical structure block diagram of a new energy vehicle power battery single cell undervoltage warning control system and control method according to the present invention;

[0028] Figure 1 The markings are: 1. Battery management system; 2. Instrument panel; 3. Vehicle communication module; 4. Early warning module. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0030] The present invention provides a new energy vehicle power battery monomer undervoltage warning control system, including a battery management system 1, an instrument panel 2, a vehicle communication module 3 and a warning module 4, the output end of the instrument panel 2 is connected to the input end of the vehicle communication module 3, the output end of the battery management system 1 is connected to the input end of the vehicle communication module 3, and the output end of the vehicle communication module 3 is connected to the input end of the warning module 4.

[0031] The battery management system 1 outputs battery status information to the vehicle communication module 3 , the instrument panel 2 outputs vehicle mileage data to the vehicle communication module 3 , and the vehicle communication module 3 outputs battery status and vehicle mileage data to the early warning module 4 .

[0032] The vehicle communication module 3 uses a telematics processor (T-BOX). The battery management system 1 is connected to the telematics processor (T-BOX) via the CAN bus, and the instrument panel 2 is also connected to the telematics processor (T-BOX) via the CAN bus. The early warning module 4 uses a cloud server. The telematics processor (T-BOX) is connected to the cloud server via a wireless network.

[0033] The present invention provides a control method for a new energy vehicle power battery cell undervoltage warning control system:

[0034] Step 1: The battery management system 1 outputs the battery status information to the vehicle communication module 3 , the instrument panel 2 outputs the vehicle mileage data to the vehicle communication module 3 , and the vehicle communication module 3 outputs the battery status information and the vehicle mileage data to the early warning module 4 .

[0035] Step 2: The warning module 4 detects whether the undervoltage alarm information of the battery cell is the first-level undervoltage alarm information. If it is not the first-level undervoltage alarm information of the battery cell, the warning module 4 does not proceed to the next step; if it is the first-level undervoltage alarm information of the battery cell, the countdown starts according to the set countdown time.

[0036] Step 3: If the countdown ends and the battery cell's undervoltage level 1 alarm state does not change, the warning module 4 triggers a platform warning.

[0037] In step 1, the battery management system 1 outputs battery cell status information including battery cell voltage data, battery cell serial number, battery cell undervoltage alarm, vehicle battery charge state and vehicle battery health state.

[0038] In step 2, after the countdown starts, the undervoltage level 1 alarm state of the battery cell changes to the normal state, the undervoltage level 2 alarm state or the undervoltage level 3 alarm state, the countdown ends, and the warning module 4 re-detects whether the battery cell is in the undervoltage level 1 alarm state.

[0039] In step three, the vehicle enters a dormant state when the countdown starts or during the countdown, and if the vehicle is still in the dormant state at the end of the countdown, the warning module 4 triggers a platform warning.

[0040] The following describes in detail a new energy vehicle power battery single cell undervoltage warning control system according to the present invention.

[0041] The present invention provides a new energy vehicle power battery cell undervoltage warning control system, which includes a battery management system 1, an instrument panel 2, a vehicle communication module 3, and a warning module 4. The battery management system 1 (BMS) is used to collect battery cell voltage data, battery cell serial number, battery cell undervoltage alarm, vehicle battery charge state, and vehicle battery health state, providing data support for the warning of the warning module 4.

[0042] The instrument panel 2 is used to collect the mileage data of the vehicle. When the warning module 4 issues a platform warning, it will output the mileage data of the vehicle for analysis by technical personnel. The technical personnel can make a reasonable assessment of the overall status of the vehicle by analyzing the mileage data of the vehicle.

[0043] The vehicle communication module 3 uses a telematics processor (T-BOX) to transmit the battery status information input by the battery management system 1 and the vehicle mileage data input by the instrument panel 2 to the warning module 4 via a wireless network. At the same time, the vehicle communication module 3 transmits the vehicle's sleep status information to the warning module 4.

[0044] Early warning module 4 uses a cloud server, on which an enterprise active service platform is deployed to monitor whether the vehicle's battery cells are undervoltage, and to issue a prompt when the battery cells enter the first-level undervoltage warning state and continue for a set time. This allows for early detection of battery cell undervoltage faults while reducing false alarms, preventing safety problems and economic losses caused by serious undervoltage faults.

[0045] The connection relationship of the undervoltage warning control system for a power battery cell of a new energy vehicle according to the present invention is described in detail below.

[0046] The battery management system 1 is connected to the telematics processor (T-BOX) via the CAM bus, the instrument panel 2 is connected to the telematics processor (T-BOX) via the telematics processor (T-BOX), and the telematics processor (T-BOX) is connected to the cloud server via a wireless network.

[0047] The following describes in detail a control method for a new energy vehicle power battery cell undervoltage warning control system according to the present invention.

[0048] The battery management system 1 outputs battery cell status information to the vehicle communication module 3. This information includes battery cell voltage data, battery cell serial number, battery cell undervoltage alarm, vehicle battery state of charge, and vehicle battery health status. The instrument cluster 2 outputs vehicle mileage data to the vehicle communication module 3, which in turn outputs the battery cell status information and mileage data to the early warning module 4. The battery management system 1 determines the undervoltage status of a battery cell and issues an undervoltage alarm. In an embodiment of the present invention, the battery management system 1 identifies the conditions and processes for undervoltage alarms for battery cells as shown in the following table. T in the table represents the ambient temperature; the battery management system 1 uses different voltage thresholds for determining undervoltage status at different ambient temperatures. When a battery cell enters a level 1 undervoltage alarm, the battery management system 1 records the fault code for the level 1 undervoltage alarm. When a battery cell enters a level 2 undervoltage alarm, the battery management system 1 records the fault code for the level 2 undervoltage alarm and outputs it to the vehicle controller. The vehicle controller issues a warning via the fault light on the instrument cluster 2 and a notification via the speaker. When a battery cell is in the undervoltage level 3 alarm state, the battery management system 1 records the undervoltage level 3 alarm fault code and limits the output power of the battery or stops the power output of the battery.

[0049]

[0050] The early warning module 4 detects whether the undervoltage alarm information of the battery cell is a level 1 undervoltage alarm information. If it is not a level 1 undervoltage alarm information of the battery cell, the early warning module 4 does not proceed to the next step; if it is a level 1 undervoltage alarm information of the battery cell, the countdown starts according to the set countdown time. If after the countdown starts, the level 1 undervoltage alarm status of the battery cell changes to a normal state, a level 2 undervoltage alarm state, or a level 3 undervoltage alarm state, the early warning module 4 will end the countdown, and the early warning module 4 will re-detect the level 1 undervoltage alarm state of the battery cell. The early warning module 4 in the present invention only processes the level 1 undervoltage alarm of the battery cell, with the purpose of issuing an early warning of the abnormal state of the battery. When the battery cell issues a level 2 undervoltage alarm or a level 3 undervoltage alarm, the processing of the undervoltage alarm is completed by the vehicle itself, thereby increasing the speed of fault handling. In an embodiment of the present invention, the countdown time is set to 24 hours.

[0051] When the countdown in the early warning module 4 expires, the undervoltage level 1 alarm state of the battery cell does not change, that is, it does not change to the normal state, the undervoltage level 2 alarm state or the undervoltage level 3 alarm state, and the early warning module 4 triggers the platform early warning. The early warning module 4 records the vehicle identification code, vehicle announcement number, vehicle model / series / brand, platform early warning time, battery cell voltage, battery cell serial number, battery charge state, battery health state, and vehicle mileage data. Technicians can conduct a detailed analysis of the vehicle's status through the information recorded by the early warning module 4. The early warning module 4 prompts the user to charge in time by sending an early warning message to the user's mobile phone. It should be noted that when the early warning module 4 countdown starts or the vehicle enters a dormant state during the countdown, and is still in a dormant state at the end of the countdown, the early warning module 4 triggers a platform early warning.

[0052] The beneficial effects of the present invention are described in detail below.

[0053] The present invention accurately warns of battery undervoltage conditions, reduces the false alarm rate, and effectively reduces the probability of false alarms through a unique warning mechanism. The warning module 4 only processes the first-level undervoltage alarm of the battery cell, and when the battery cell enters the first-level undervoltage warning state, a 24-hour countdown is set. During the countdown, if the state of the battery cell changes, the warning module 4 ends the countdown and re-detects. This design avoids false alarms caused by short-term fluctuations in battery voltage. For example, during vehicle driving, the battery voltage may drop briefly due to instantaneous high-power output, but it will quickly return to normal. Traditional systems may mistakenly judge it as an undervoltage fault and issue an alarm. However, this system, through the countdown and status monitoring mechanism, can accurately distinguish between short-term fluctuations and real faults. While reducing false warnings, it can detect battery undervoltage faults in advance, thereby buying time for subsequent fault processing.

[0054] The present invention provides an early warning when a minor battery undervoltage fault occurs, ensuring vehicle safety and achieving an early warning of a battery undervoltage fault, effectively preventing safety problems and economic losses caused by a serious undervoltage fault. When a battery cell is in the first-level undervoltage alarm state and continues for a set 24 hours, the warning module 4 triggers a platform warning. This early warning mechanism allows technicians and users to promptly grasp the abnormal status of the battery and take corresponding measures. 3. Multi-data fusion, comprehensive assessment of vehicle status

[0055] This invention integrates multiple aspects of information, including battery cell voltage data, serial number, undervoltage alarm, state of charge, and health status, collected by the battery management system 1, along with vehicle mileage data collected by the instrument panel 2. This data is transmitted to the early warning module 4 via the vehicle communication module 3, providing technicians with a rich basis for analysis. Combined with vehicle mileage data, technicians can make a reasonable assessment of the vehicle's overall condition. For example, by analyzing battery performance changes at different mileages, they can determine battery degradation, providing a scientific basis for vehicle maintenance and battery replacement. Furthermore, based on vehicle mileage and battery status, the vehicle's energy management strategy can be optimized to improve its range and energy efficiency.

[0056] By monitoring the battery cell voltage and fault signals, the present invention promptly reminds users to charge their vehicles, preventing over-discharge that could affect vehicle starting or driving. By identifying existing or potential risks in the vehicle, the present invention provides early warning and timely treatment of battery cells before national standard alarms occur, reducing the number of fault alarms, reducing national platform alarm data, and improving problem resolution efficiency.

[0057] This invention enhances the brand image. Through the single-cell undervoltage warning, it can prompt users in advance to pay attention to and repair the vehicle battery in time, which can effectively discover problems and reduce maintenance costs. In addition, together with other fault warnings, it can more effectively reduce the number of times the third-level alarm data of the national platform appears, thereby reducing the number of pending fault tasks of the national platform each year and enhancing the brand image.

[0058] The present invention has low cost and good versatility, does not involve any changes to software or hardware, and does not require any additional costs. It only collects and processes vehicle data through the enterprise platform, with relatively small changes. It is suitable for single-cell undervoltage warnings for all new energy vehicles of the enterprise.

[0059] The present invention has high processing efficiency. The longest time for battery cell undervoltage to occur is only 24 hours. The early warning module 4 or after-sales service personnel can remind the user to go to the station for processing in time, avoiding the occurrence of secondary / tertiary faults due to untimely processing, which will cause more serious consequences to the user, generate more maintenance costs, waste more time, etc.

[0060] The present invention avoids the occurrence of thermal runaway failures, which are more likely to occur due to undervoltage in battery cells. By monitoring and processing vehicle data through the enterprise platform, the causes of thermal runaway can be effectively reduced, the occurrence of another national standard alarm can be reduced, and the health of the vehicle battery and the endurance of the entire vehicle can be improved.

[0061] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A new energy vehicle power battery monomer undervoltage warning control system, characterized by: It includes a battery management system, an instrument panel, a vehicle communication module and an early warning module. The output end of the instrument panel is connected to the input end of the vehicle communication module, the output end of the battery management system is connected to the input end of the vehicle communication module, and the output end of the vehicle communication module is connected to the input end of the early warning module.

2. The new energy vehicle power battery monomer undervoltage warning control system according to claim 1, characterized in that: The battery management system outputs battery status information to the vehicle communication module, the instrument panel outputs vehicle mileage data to the vehicle communication module, and the vehicle communication module outputs battery status and vehicle mileage data to the early warning module.

3. The new energy vehicle power battery monomer undervoltage warning control system according to claim 1, characterized in that: The vehicle communication module adopts a telematics processor (T-BOX).

4. A new energy vehicle power battery cell undervoltage warning control system according to claim 1 or 3, characterized in that: The battery management system is connected to the telematics processor (T-BOX) via a CAN bus, and the instrument panel is connected to the telematics processor (T-BOX) via a CAN bus.

5. The new energy vehicle power battery monomer undervoltage warning control system according to claim 1, characterized in that: The early warning module adopts a cloud server.

6. A new energy vehicle power battery cell undervoltage warning control system according to claim 3 or 5, characterized in that: The telematics processor (T-BOX) is connected to the cloud server via a wireless network.

7. A control method for a new energy vehicle power battery cell undervoltage warning control system according to claims 1-6, characterized in that: Step 1: The battery management system outputs the battery status information to the vehicle communication module, the instrument panel outputs the vehicle mileage data to the vehicle communication module, and the vehicle communication module outputs the battery status information and vehicle mileage data to the early warning module; Step 2: The early warning module detects whether the undervoltage alarm information of the battery cell is a level 1 undervoltage alarm information. If it is not a level 1 undervoltage alarm information of the battery cell, the early warning module does not proceed to the next step; if it is a level 1 undervoltage alarm information of the battery cell, the countdown starts according to the set countdown time; Step 3: If the countdown ends and the battery cell's undervoltage level 1 alarm status does not change, the warning module triggers a platform warning.

8. The control method of the new energy vehicle power battery cell undervoltage warning control system according to claim 7, characterized in that: In step 1, the battery management system outputs battery cell status information including battery cell voltage data, battery cell serial number, battery cell undervoltage alarm, vehicle battery charge state and vehicle battery health state.

9. The control method of the new energy vehicle power battery cell undervoltage warning control system according to claim 7, characterized in that: In step 2, after the countdown starts, the undervoltage level 1 alarm state of the battery cell changes to the normal state, the undervoltage level 2 alarm state or the undervoltage level 3 alarm state, the countdown ends, and the early warning module re-detects whether the battery cell is in the undervoltage level 1 alarm state.

10. The control method of the new energy vehicle power battery cell undervoltage warning control system according to claim 7, characterized in that: In step three, the vehicle enters a dormant state at the start of the countdown or during the countdown. If the vehicle is still in a dormant state at the end of the countdown, the warning module triggers a platform warning.

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