CN110861531A - Power battery failure early warning system and method - Google Patents
Power battery failure early warning system and method Download PDFInfo
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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
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Arrangement of adaptations of instruments
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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
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The embodiment of the application provides a power battery failure early warning system and a method, and the method comprises the following steps: the system comprises a battery management system connected with a power battery, and a vehicle-mounted T-BOX connected with the power battery; the cloud server is connected with the vehicle-mounted T-BOX; the monitoring platform is connected with the cloud server; the vehicle-mounted alarm device is connected with the vehicle-mounted T-BOX; the battery management system acquires the operation parameters of the power battery and then sends the operation parameters to the vehicle-mounted T-BOX; the vehicle-mounted T-BOX is sent to a cloud server; the cloud server analyzes whether the power battery has failure risks or not according to the operation parameters and the power battery failure standard; when the power battery has failure risks, first early warning information containing failure reasons and corresponding processing measures is sent to a monitoring platform and a vehicle-mounted T-BOX; the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information; the early warning prompt for the failure of the power battery from multiple aspects is realized, and the solution is provided for the vehicle owner more timely and accurately.
Description
Technical Field
The application relates to the technical field of electric automobiles, in particular to a power battery failure early warning system and method.
Background
The lithium ion battery is widely applied to the electric vehicle due to the advantages of high working voltage, high power density and energy density, long service life, no memory effect and the like. Because the vehicle-mounted space of the passenger vehicle is limited, the energy requirement of the power battery is higher and higher in order to improve the endurance mileage. However, higher specific energy means that the energy released uncontrollably is more concentrated and causes greater personnel or property damage. Therefore, the power battery is out of control and is a problem which must be solved in the development process of the electric automobile.
The patent with application number CN 201710145890.9 discloses a method for judging battery failure through the temperature change rate of a power battery, and preventing thermal runaway by cutting off a main relay. But the coverage of this solution is limited and there is no early warning. Patent No. CN 201810122868.7 discloses a thermal runaway judgment method based on a thermal runaway model, but the method is mainly used for power battery design and is not suitable for real-time monitoring. Patent with application number CN 201810400715.4 has added a set of stress test system in the power battery, can the rapid detection battery because of the stress variation that thermal failure led to, but this can lead to the increase of cost and battery PACK structure complexity, and does not have early warning.
Therefore, in order to overcome the defects in the prior art, it is necessary to provide a scheme for better implementing the early warning of the failure of the power battery.
Disclosure of Invention
The embodiment of the application aims to provide a power battery failure early warning system and a power battery failure early warning method, which are used for early warning of power battery failure and can provide a technical effect of solution measures for an owner more timely and accurately.
In a first aspect, an embodiment of the present application provides a power battery failure early warning system, which includes a battery management system connected to a power battery, and a vehicle-mounted T-BOX connected to the power battery; a cloud server in communication connection with the onboard T-BOX; the monitoring platform is connected with the cloud server; the vehicle-mounted alarm device is connected with the vehicle-mounted T-BOX; the user terminal is connected with the cloud server; the battery management system is used for acquiring the operating parameters of the power battery; the vehicle-mounted T-BOX is used for receiving the operation parameters and sending the operation parameters to the cloud server; the cloud server is used for analyzing whether the power battery has failure risks or not according to the operation parameters; if the power battery has failure risks, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to the monitoring platform and the user terminal; after the vehicle-mounted T-BOX receives the first early warning information, the vehicle-mounted warning device is started to give an early warning prompt; and the monitoring platform starts a corresponding alarm device to give an early warning prompt after receiving the first early warning information.
In the implementation process, a battery management system on the electric vehicle is used for acquiring the operation parameters of the power battery in real time, and then the operation parameters are sent to the vehicle-mounted T-BOX; the vehicle-mounted T-BOX receives the operation parameter and then sends the operation parameter to the cloud server; the cloud server analyzes the operation parameters and confirms whether the power battery has failure risk or not; if the power battery has failure risks, the cloud server sends first early warning information containing failure reasons and corresponding processing measures to the monitoring platform after confirming the failure reasons; after receiving the first early warning information, the vehicle-mounted T-BOX starts a vehicle-mounted warning device to give an early warning prompt; and the monitoring platform starts a corresponding alarm device to give an early warning prompt after receiving the first early warning information. By the mode, early warning can be carried out on the failure of the power battery from multiple aspects, corresponding treatment measures can be provided for failure reasons, the failure problem can be accurately solved in time, and loss caused by the failure of the power battery is reduced.
Further, the monitoring platform includes a controller; a display connected with the controller; the audible and visual alarm is connected with the controller; the controller is used for receiving the first early warning information and performing text prompt on the display; and simultaneously starting the audible and visual alarm to give an early warning prompt.
In the implementation process, the monitoring platform can display on the display after receiving the first early warning information, the audible and visual alarm is started to give an alarm for prompting, various modes are used for reminding workers of the monitoring center, the workers can timely know the failure reason of the power battery, and processing measures are taken.
Further, the vehicle-mounted alarm device comprises a vehicle instrument and a vehicle-mounted MP5 display.
In the implementation process, the vehicle-mounted alarm device uses a vehicle instrument and a vehicle-mounted MP5 display, and the vehicle-mounted T-BOX can start the vehicle instrument and the vehicle-mounted MP5 display to perform early warning prompt after receiving the first early warning information, so that a vehicle owner can know the failure reason of the power battery in time, and the problem of the failure of the power battery in time is solved according to the provided treatment measures.
In a second aspect, an embodiment of the present application provides a power battery failure early warning method, which is applied to the power battery failure early warning system, and includes acquiring an operation parameter of a power battery in real time; analyzing whether failure risks exist in the running process of the power battery or not according to the running parameters and the power battery failure standard; if the power battery has failure risks in the running process, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to a monitoring platform and a vehicle-mounted T-BOX; the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; and the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information.
In the implementation process, the cloud server acquires the operation parameters of the power battery in real time, and then analyzes whether the failure risk exists in the operation process of the power battery according to the operation parameters and the failure standard of the power battery; if the power battery has failure risks, first early warning information containing failure reasons and corresponding processing measures is sent to the monitoring platform and the vehicle-mounted T-BOX after the failure reasons are confirmed; finally, the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; and the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information. When the failure risk of the power battery is detected, early warning prompts can be timely carried out on a vehicle owner and monitoring personnel, corresponding processing measures are provided, and the problem that the power battery fails is timely solved.
Further, the step of analyzing whether the power battery runs with failure risk according to the operation parameters and the power battery failure standard comprises: acquiring voltage information in the operation parameters, analyzing the maximum differential pressure variation trend of the power battery under the condition of the same preset electric quantity percentage in a first preset time period according to the voltage information, and analyzing whether the single power battery has failure risk or not according to the maximum differential pressure variation trend and the maximum allowable differential pressure of the power battery.
In the implementation process, the maximum differential pressure variation trend of the power battery can be analyzed according to the voltage information in the operation parameters of the power battery, and then whether the power battery has failure risks or not can be analyzed according to the maximum differential pressure variation trend and the maximum allowable differential pressure of the power battery.
Further, the step of analyzing whether the power battery runs with failure risk according to the operation parameters and the power battery failure standard comprises: acquiring charge amount information in the operation parameters; and analyzing a charging quantity attenuation rate of the power battery in a second preset time period according to charging quantity information, and analyzing whether the power battery monomer has failure risk or not according to the charging quantity attenuation rate and the maximum allowable attenuation rate of the power battery.
In the implementation process, the charging amount attenuation rate of the power battery in a period of time can be analyzed according to the charging amount information in the operation parameters of the power battery, and then whether the power battery monomer has a failure risk or not can be analyzed according to the charging amount attenuation rate and the maximum allowable attenuation rate of the power battery.
Further, the method further comprises: and acquiring first charging parameter information in the operating parameters, analyzing whether charging current is still input when the voltage of the power battery is too high according to the charging parameter information, and if the charging current is still input, sending third early warning information to the user terminal and the monitoring platform.
In the implementation process, parameter information of the power battery during charging can be acquired, and then whether charging current is still input when the voltage of the power battery is too high is analyzed; if the charging current is still input, early warning information is sent to the user terminal and the monitoring platform to remind the vehicle owner and background monitoring personnel, and the problem of charging overvoltage is solved in time.
Further, the method further comprises: acquiring second charging parameter information of the power battery after a second preset time period after the third early warning prompt information is sent; and analyzing whether the charging current still exists in the power battery according to the second charging parameter information, and if the charging current still exists in the power battery, sending a finished automobile power-off instruction to the vehicle-mounted T-BOX.
In the implementation process, after the problem of charging overvoltage of the power battery is early warned, the charging parameters of the power battery after the preset time period can be obtained again, whether the charging current still exists in the power battery is analyzed, and if the charging current still exists, a power-off instruction of the whole vehicle is sent to the vehicle-mounted T-BOX, so that the power battery is prevented from being damaged.
Further, the method further comprises: and analyzing whether the temperature rising speed of the power battery exceeds a preset value within a third preset time period according to the operation parameters, and if the temperature rising speed exceeds the preset value, sending fourth early warning information to the user terminal and the monitoring platform.
In the implementation process, whether the temperature rising speed of the power battery in a preset time period exceeds a preset value or not can be analyzed, and corresponding early warning information is sent to the user terminal and the monitoring platform after the temperature rising speed exceeds the preset value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of a topology structure of a power battery failure early warning system provided in an embodiment of the present application;
fig. 2 is a schematic flow chart of a power battery failure early warning method provided in the embodiment of the present application;
FIG. 3 is a graph of a pressure differential versus time fit provided by an embodiment of the present application;
fig. 4 is a graph of fitted electric quantity-time provided in the embodiment of the present application.
Icon: 10-a power battery failure early warning system; 100-a battery management system; 200-vehicle T-BOX; 300-a cloud server; 400-a monitoring platform; 410-a display; 420-audible and visual alarm; 500-vehicle mounted alarm device; 510-vehicle instrumentation; 520-vehicle MP5 display; 600-a user terminal; 700-power battery.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic diagram of a topology structure of a power battery failure warning system according to an embodiment of the present disclosure.
In order to perform early warning on the failure problem of the power battery 700 and solve the problem of out-of-control of the power battery 700 in time, the embodiment of the present application provides a power battery failure early warning system 10. The system comprises a battery management system 100 connected with a power battery 700, and an on-board T-BOX200 connected with the power battery 700; a cloud server 300 connected in communication with the onboard T-BOX 200; a monitoring platform 400 connected to the cloud server 300; a vehicle-mounted alarm device 500 connected to the vehicle-mounted T-BOX 200; the battery management system 100 is used for acquiring the operation parameters of the power battery 700; the vehicle-mounted T-BOX200 is used for receiving the operation parameters and sending the operation parameters to the cloud server 300; the cloud server 300 is used for analyzing whether the power battery 700 has failure risks according to the operation parameters and the failure standard of the power battery 700; if the power battery 700 has failure risk, confirming the failure reason and sending first early warning information containing the failure reason and corresponding processing measures to the monitoring platform 400 and the vehicle-mounted T-BOX 200; the vehicle-mounted T-BOX200 starts a vehicle-mounted alarm device 500 to give an early warning prompt according to the first early warning information; and the monitoring platform 400 starts a corresponding alarm device to perform early warning prompt according to the first early warning information.
In one embodiment, monitoring platform 400 includes a controller; a display 410 connected to the controller; an audible and visual alarm 420 connected with the controller; the in-vehicle warning device 500 includes a vehicle meter 510 and an in-vehicle MP5 display 520. The battery failure criteria may be set according to design parameters of power battery 700. For example, the failure standard of the power battery 700 may be set according to the maximum allowable pressure difference of the power battery 700, after the cloud server 300 obtains the operation parameters of the power battery 700, the voltage information in the operation parameters of the power battery 700 within a period of time is analyzed to obtain the maximum pressure difference variation trend of the power battery 700, and then whether the maximum pressure difference exceeds the maximum allowable pressure difference in the future period of time is analyzed according to the variation trend; if the maximum allowable differential pressure is exceeded, sending early warning information containing the maximum allowable differential pressure overrun time and nearby maintenance points to the vehicle-mounted T-BOX200 and the monitoring platform 400 according to the analyzed time exceeding the maximum allowable differential pressure; after receiving the early warning information, the vehicle-mounted T-BOX200 starts the vehicle instrument 510 and the vehicle-mounted MP5 display 520 to perform corresponding alarm prompt, after receiving the early warning information, the monitoring platform 400 displays the corresponding early warning information on the display 410, and simultaneously, the audible and visual alarm 420 starts the corresponding alarm prompt. Through the mode, on the one hand, monitoring personnel can be reminded through various modes to supervise the electric vehicle corresponding to the power battery 700, on the other hand, a vehicle owner can be informed in time to maintain, and the problem of battery failure is solved in advance.
In some cases, when the vehicle instrument 510 and the vehicle-mounted MP5 display 520 perform alarm prompting, a driver may not be present on the electric vehicle, so as to facilitate the driver to timely obtain the early warning information, the cloud server 300 in the early warning system for failure of the power battery 700 provided in the embodiment of the present application is further connected to the user terminal 600 (for example, a mobile phone), and after the cloud server 300 analyzes that the power battery 700 has failure risk, the cloud server can also send alarm information to the user terminal 600, so that a vehicle owner can timely obtain the early warning information for failure of the power battery 700, and timely take corresponding solutions according to the early warning information, thereby reducing potential safety hazards.
Please refer to fig. 2, fig. 2 is a schematic flow chart of a power battery failure warning method according to an embodiment of the present disclosure.
In order to better utilize the power battery failure early warning system provided by the embodiment of the application, the embodiment of the application also provides a power battery failure early warning method. The specific contents thereof are as follows.
And step S101, acquiring the operation parameters of the power battery in real time.
The battery management system on the electric vehicle can acquire the operation parameters of the power battery in real time and then send the operation parameters to the cloud server through the vehicle-mounted T-BOX. The operation parameters of the power battery comprise voltage, current, temperature and the like of the power battery.
And S102, analyzing whether the power battery has failure risks in the operation process according to the operation parameters and the power battery failure standard.
After the cloud server obtains the operating parameters of the power battery, whether failure risks exist in the operating process of the power battery can be analyzed according to the set power battery failure standard.
And S103, if the power battery has failure risks in the operation process, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to a monitoring platform and the vehicle-mounted T-BOX.
After the cloud server analyzes that the power battery has failure risks, the cloud server packs failure reasons and corresponding processing measures in early warning information according to an analysis result and sends the failure reasons and the corresponding processing measures to the monitoring platform and the vehicle-mounted T-BOX.
Step S104, the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; and simultaneously, the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information.
After the vehicle-mounted T-BOX receives the early warning information, a vehicle-mounted warning device is started to carry out corresponding early warning prompt; meanwhile, the monitoring platform can start the corresponding alarm device to give an early warning prompt after receiving the early warning information.
In order to make the implementation of the above method more clear, the present application also provides the following specific examples for a brief description.
Example 1:
referring to fig. 3, fig. 3 is a graph of fitting differential pressure versus time provided by an embodiment of the present application.
In one embodiment, the cloud server may obtain voltage information in the operating parameters of the power battery, analyze a maximum voltage difference variation trend of the power battery under the same preset electric quantity percentage condition within a first preset time period according to the voltage information, and analyze whether the power battery will fail in a future period of time according to the variation trend.
For example, the cloud server analyzes the voltage information in the operation parameters to obtain a power battery of a certain electric vehicle, and the maximum differential pressure data of the power battery when the percentage of electricity is 5% in the last 8 days is shown in table 1:
TABLE 1
Performing quadratic curve fitting on the time-pressure difference data, wherein the fitting polynomial is as follows:
y＝2.647x2+13.5x+83.63 (1)
if the maximum allowable pressure difference of the power battery is 500mV, the pressure difference exceeds 500mV on the 10 th day according to the formula (1), so that on the 8 th day, the cloud server sends early warning information containing the maximum pressure difference overrun time and nearby maintenance places to the monitoring platform, and the monitoring platform receives the early warning information and then displays the early warning information through a display after matching with reserved information in the database; for example, after the controller of the monitoring platform receives the warning information, the warning information can be displayed in red characters on the display: "VIN 910 x vehicle model will exceed differential pressure after 2 days, owner's phone: 139, nearby service point phone: 028. please treat as soon as possible. And the audible and visual alarm arranged on the monitoring platform can also perform audible and visual alarm to remind monitoring personnel to pay attention to the early warning information. The cloud server also sends early warning information containing the maximum pressure difference overrun time and nearby maintenance places to the vehicle-mounted T-BOX, the vehicle-mounted T-BOX receives the early warning information and then sends the early warning information to a vehicle instrument and an MP5 display for displaying, and meanwhile, the MP5 display can also give a voice alarm for prompting.
Example 2:
referring to fig. 4, fig. 4 is a graph of fitted charge-time curves provided by the embodiments of the present application.
In one embodiment, the cloud server may further obtain charge amount information in the operation parameters, and analyze a charge amount decay rate of the power battery in a second preset time period according to the charge amount information; and then analyzing whether the power battery single body has failure risk or not according to the charging decay rate and the maximum allowable decay rate of the power battery.
For example, the power battery of an electric vehicle, the rated electric quantity of 51kWh, and the charging quantity of the power battery from 30% of electric quantity percentage to 80% of electric quantity percentage in the last 8 days after the cloud server analyzes the charging quantity information of the power battery, are shown in table 2:
TABLE 2
| Time (sky) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Electric quantity (kWh) | 25 | 24.8 | 24.5 | 24.5 | 24.1 | 23.5 | 23 | 22.6 |
The time-charge data was curve-fitted to obtain a slope of-0.3478 (i.e., the charge decay rate).
If the maximum operation attenuation slope of the power battery is-0.34, the electric quantity attenuation slope exceeds the threshold value in about 8 days, so that on the 8 th day, the cloud server sends early warning information containing the electric quantity attenuation overrun and nearby maintenance places to the monitoring platform, and the monitoring platform receives the early warning information and then displays the information after matching with the reserved information in the database through the display, for example, the information can be displayed in red characters on the display: "VIN 910 × vehicle model electricity quantity attenuation overrun, vehicle owner's phone: 139, nearby service point phone: 028. please treat as soon as possible. And the audible and visual alarm arranged on the monitoring platform can also perform audible and visual alarm to remind monitoring personnel to pay attention to the early warning information. The cloud server can also send early warning information containing the electric quantity attenuation overrun and nearby maintenance places to the monitoring platform at the same time. The vehicle-mounted T-BOX receives the early warning information and then sends the early warning information to a vehicle instrument and an MP5 display for displaying, and meanwhile, the MP5 display can also carry out voice alarm prompting.
Example 3:
in an implementation manner, the cloud server may further obtain first charging parameter information (including charging current, voltage, and the like) under a charging condition in the operation parameters of the power battery, analyze whether charging current still remains to be input when the voltage of the power battery is too high according to the first charging parameter information, and send third warning information to the user terminal and the monitoring platform if charging current still remains to be input.
For example, when an electric vehicle is being charged, the battery management system detects that the maximum voltage of the power battery cell is 4.2V, and the maximum allowable voltage of the power battery of the vehicle type is 4.18V. In addition, there is still a charging current of 1A at this time. At this moment, the cloud server sends an early warning message to the user terminal (for example, a car owner mobile phone) and rings for prompting: "you are in an overcharged state and please stop charging as soon as possible! "; simultaneously, the cloud server still can send corresponding early warning information to monitoring platform, and monitoring platform starts audible-visual annunciator after receiving this early warning information and sends the warning prompt tone, promotes the early warning characters on the display simultaneously: "VIN 910 × vehicle model overcharge, owner's phone: 139, please contact the owner immediately ". In addition, a monitoring person of the monitoring platform checks the overcharge fault and should contact the owner of the vehicle by telephone immediately; if the automobile owner is not contacted within 3 minutes, the whole automobile can be powered off in a remote forced mode.
In order to further ensure that the problem of failure of the power battery is solved in time, the cloud server can also obtain second charging parameter information of the power battery after a third preset time period (for example, 3 minutes) after third early warning information is sent, then whether charging current still exists is analyzed again, and if the charging current still exists, a whole vehicle power-off instruction is sent to the vehicle-mounted T-BOX; and after the vehicle-mounted T-BOX receives a power-off instruction of the whole vehicle, the charger is controlled to power off.
Example 4:
in an embodiment, after the cloud service acquires the operating parameters of the power battery, whether the temperature rise speed of the power battery in a third preset time period exceeds a preset value or not can be analyzed, and if the temperature rise speed exceeds the preset value, fourth early warning information is sent to the user terminal and the monitoring platform.
Exemplarily, if a certain electric vehicle is running, if the cloud server obtains that the temperature of the power battery is increased by more than 2 ℃ within 5 seconds and the temperature of the power battery is increased by more than 5 ℃ continuously for 15 seconds by analyzing the operation parameters of the power battery, the cloud server sends corresponding early warning information to the monitoring platform, the monitoring platform starts an audible and visual alarm to send an alarm prompt tone after receiving the early warning information, and simultaneously displays and prompts early warning characters through a display: "VIN 910 x vehicle type battery failure, owner's phone: 139, please contact car owner immediately "; in addition, the cloud server can also send the early warning information to a user terminal (such as a car owner mobile phone) in a short message mode, and alarm by ring: "power battery temperature rise is too fast, please stop nearby, and keep away from the vehicle, after sale phone 028 ×; meanwhile, the vehicle instrument and the MP5 display can also display that the temperature of the power battery is too fast, and the vehicle should be stopped nearby and far away from the vehicle.
In summary, the embodiment of the present application provides a system and a method for early warning of failure of a power battery, including a battery management system connected to the power battery, and a vehicle-mounted T-BOX connected to the power battery; the cloud server is in communication connection with the vehicle-mounted T-BOX; the monitoring platform is connected with the cloud server; the vehicle-mounted alarm device is connected with the vehicle-mounted T-BOX; the battery management system is used for acquiring the operation parameters of the power battery; the vehicle-mounted T-BOX is used for receiving the operation parameters and sending the operation parameters to the cloud server; the cloud server is used for analyzing whether the power battery has failure risks or not according to the operation parameters and the power battery failure standard; if the power battery has failure risks, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to a monitoring platform and a vehicle-mounted T-BOX; the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information; through the mode, early warning prompt can be carried out on failure of the power battery from multiple aspects, and the vehicle owner can be provided with a solution more timely and accurately.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A power battery failure early warning system, characterized by includes:
the system comprises a battery management system connected with a power battery, and a vehicle-mounted T-BOX connected with the power battery; a cloud server in communication connection with the onboard T-BOX; the monitoring platform is connected with the cloud server; the vehicle-mounted alarm device is connected with the vehicle-mounted T-BOX;
the battery management system is used for acquiring the operating parameters of the power battery; the vehicle-mounted T-BOX is used for receiving the operation parameters and sending the operation parameters to the cloud server; the cloud server is used for analyzing whether the power battery has failure risks or not according to the operation parameters and the power battery failure standard; if the power battery has failure risks, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to the monitoring platform and the vehicle-mounted T-BOX; the vehicle-mounted T-BOX starts the vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; and the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information.
2. The power battery failure warning system of claim 1, wherein the monitoring platform comprises a controller; a display connected with the controller; the audible and visual alarm is connected with the controller; the controller is used for receiving the first early warning information and performing text prompt on the display; and simultaneously starting the audible and visual alarm to give an early warning prompt.
3. The power battery failure warning system of claim 1, wherein the vehicle mounted warning device comprises a vehicle meter and a vehicle mounted MP5 display.
4. The power battery failure warning system of claim 1, further comprising: the user terminal is connected with the cloud server; the cloud server is further used for sending the first early warning information to the user terminal after the power battery has failure risks.
5. A power battery failure early warning method is applied to a power battery failure early warning system and is characterized by comprising the following steps:
acquiring the operation parameters of the power battery in real time;
analyzing whether failure risks exist in the running process of the power battery or not according to the running parameters and the power battery failure standard;
if the power battery has failure risks in the running process, confirming failure reasons and sending first early warning information containing the failure reasons and corresponding processing measures to a monitoring platform and a vehicle-mounted T-BOX;
the vehicle-mounted T-BOX starts a vehicle-mounted alarm device to give an early warning prompt according to the first early warning information; and the monitoring platform starts a corresponding alarm device to give an early warning prompt according to the first early warning information.
6. The method of claim 5, wherein the step of analyzing whether there is a risk of failure during operation of the power cell based on the operating parameters and a power cell failure criterion comprises:
acquiring voltage information in the operation parameters, analyzing the maximum differential pressure variation trend of the power battery under the condition of the same preset electric quantity percentage in a first preset time period according to the voltage information, and analyzing whether the single power battery has failure risk or not according to the maximum differential pressure variation trend and the maximum allowable differential pressure of the power battery.
7. The method of claim 5, wherein the step of analyzing whether there is a risk of failure during operation of the power cell based on the operating parameters and a power cell failure criterion comprises:
acquiring charge amount information in the operation parameters; and analyzing a charging quantity attenuation rate of the power battery in a second preset time period according to charging quantity information, and analyzing whether the power battery monomer has failure risk or not according to the charging quantity attenuation rate and the maximum allowable attenuation rate of the power battery.
8. The method of claim 5, further comprising:
and acquiring first charging parameter information in the operating parameters, analyzing whether charging current is still input when the voltage of the power battery is too high according to the charging parameter information, and if the charging current is still input, sending third early warning information to the user terminal and the monitoring platform.
9. The method of claim 8, further comprising:
acquiring second charging parameter information of the power battery after a second preset time period after the third early warning prompt information is sent;
and analyzing whether the charging current still exists in the power battery according to the second charging parameter information, and if the charging current still exists in the power battery, sending a finished automobile power-off instruction to the vehicle-mounted T-BOX.
10. The method of claim 5, further comprising:
and analyzing whether the temperature rising speed of the power battery exceeds a preset value within a third preset time period according to the operation parameters, and if the temperature rising speed exceeds the preset value, sending fourth early warning information to the user terminal and the monitoring platform.
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