CN114932836A - Method and device for monitoring charging state of vehicle and vehicle - Google Patents
Method and device for monitoring charging state of vehicle and vehicle Download PDFInfo
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- CN114932836A CN114932836A CN202210627883.3A CN202210627883A CN114932836A CN 114932836 A CN114932836 A CN 114932836A CN 202210627883 A CN202210627883 A CN 202210627883A CN 114932836 A CN114932836 A CN 114932836A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to 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
- Y02T90/12—Electric charging stations
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method and a device for monitoring the charging state of a vehicle and the vehicle. The vehicle comprises a battery management system and an edge processor, wherein after a power battery of the vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy; in the charging process of the power battery, a battery management system monitors the charging parameters of the power battery in real time, and generates first fault alarm information when monitoring abnormal charging parameters; the method comprises the steps that an edge processor obtains charging parameters sent by a battery management system in real time and analyzes the thermal runaway risk level of the power battery; and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to a battery management system so as to adjust the charging strategy. By adopting the invention, the evaluation and monitoring of the charging state of the power battery in the charging process can be effectively realized, and the charging safety of the battery is improved.
Description
Technical Field
The invention relates to the technical field of vehicle charging, in particular to a method and a device for monitoring a charging state of a vehicle and the vehicle.
Background
With the continuous development of social economy and vehicle technology, vehicles have become essential transportation devices in people's lives. Moreover, with the continuous popularization of the green trip concept, the electric automobile is increasingly applied to people's trips, and the demand of the power battery is in the trend of blowout.
The aspects of cruising ability, use safety and the like of the power battery are closely related to the charging process of the power battery, so that the method for accurately monitoring the relevant parameters and the charging state of the power battery in the charging process becomes the key point of attention of people. A power Battery Management System (BMS) is an important link for connecting a vehicle-mounted power battery and an electric automobile, and can monitor and manage the power battery in a charging process. However, the inventors found that the prior art has at least the following problems: in the prior art, the monitoring and management process of the power battery is rough and simple only by means of a power battery management system, the calculation of various parameters and the evaluation of the charging state in the charging process of the battery are difficult to accurately realize, and the charging safety of the electric automobile is difficult to guarantee.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for monitoring the charging state of a vehicle and the vehicle, which can effectively realize the evaluation and monitoring of the charging state of a power battery in the charging process and improve the safety of battery charging.
To achieve the above object, an embodiment of the present invention provides a method for monitoring a state of charge of a vehicle, the vehicle including a battery management system and an edge processor, the method including:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy;
in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters;
the edge processor acquires the charging parameters sent by the battery management system in real time, and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy.
As an improvement of the above scheme, after the first fault alarm information is generated when the abnormal charging parameter is monitored, the method further includes:
the battery management system sends the first fault alarm information to the edge processor;
and the edge processor uploads the first fault alarm information to a cloud processor so that the cloud processor executes a preset first charging protection strategy.
As an improvement of the above, the method further comprises:
and the edge processor uploads the charging parameters and the driving data of the vehicle to the cloud processor in real time, so that the cloud processor analyzes the lithium analysis condition and the internal short circuit state of the power battery according to the charging parameters and the driving data, and executes a preset second charging protection strategy according to the lithium analysis condition and the internal short circuit state.
As an improvement of the above scheme, the charging parameters include a charging socket temperature, a power battery pack temperature, a cell voltage and a battery pack pressure;
then, the battery management system monitors the charging parameters of the power battery in real time, and generates a first fault alarm message when monitoring the abnormal charging parameters, which specifically includes:
monitoring the charging socket temperature of the power battery, the temperature of a power battery pack, the voltage of a battery core and the pressure in the battery pack in real time;
judging whether the temperature of the charging socket exceeds a first preset temperature threshold, whether the temperature of the power battery pack exceeds a second preset temperature threshold, whether the voltage of the battery core exceeds a preset voltage threshold, and whether the pressure in the battery pack exceeds a preset pressure threshold;
when any one of the conditions occurs, judging that the abnormal charging parameters are monitored, and generating first fault alarm information.
As an improvement of the above scheme, the edge processor analyzes the thermal runaway risk level of the power battery according to the charging parameter, and specifically includes:
the edge processor determines a preset input value of an equivalent prediction model for predicting the thermal runaway risk level according to the charging parameters so as to calculate the thermal runaway risk level of the power battery;
the input values of the equivalent prediction model comprise the cell equalization time during charging, the charging time length ratio of the battery pack in different temperature intervals, the total charging capacity, the ratio of the direct current charging times to the total charging times, the current capacity of the battery, the historical capacity decay rate of the battery and the charging terminal pressure difference.
As an improvement of the above solution, after the power battery of the vehicle establishes a charging connection with the charging pile, the battery management system requests the charging pile to charge according to a preset charging policy, and specifically includes:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system calculates the current charging request current according to the battery state information of the power battery and a preset charging MAP (MAP) table, and requests the charging pile to be charged by the charging request current; the charging MAP table records the corresponding relation between the battery state information and the charging request current;
then, when the thermal runaway risk level exceeds a preset standard level, generating a charging adjustment strategy, specifically including:
when the thermal runaway risk level exceeds a preset standard level, determining an adjustment proportion of a charging request current corresponding to each battery state information in the charging MAP table according to the value of the charging parameter so as to generate the charging adjustment strategy; the charging adjustment strategy is used for adjusting the charging MAP table.
As an improvement of the above, the method further comprises:
in the charging process of the power battery, the battery management system evaluates the quality of the charging pile according to the charging pile information sent by the charging pile to generate a first quality evaluation result, and sends the charging pile state information and the first quality evaluation result to the edge processor;
the edge processor compares and evaluates the charging pile information, the first quality evaluation result and the charging parameters with historical charging pile data of the vehicle according to the charging pile information, the first quality evaluation result and the charging parameters which are received currently to generate a second quality evaluation result;
and binding the second quality evaluation result with the identity information of the charging pile, and issuing the second quality evaluation result to the battery management system for storage and display.
As an improvement of the above, the method further comprises:
and the edge processor uploads the identity information and the second quality evaluation result of the charging pile to a cloud processor, so that the cloud processor ranks and evaluates the quality of each charging pile according to the identity information of the charging pile uploaded by different vehicles and the corresponding second quality evaluation result to obtain a third quality evaluation result, and sends the third quality evaluation result to the battery management system for storage and display.
The embodiment of the invention also provides a vehicle, which comprises a battery management system and an edge processor;
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy;
in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters;
the edge processor acquires the charging parameters sent by the battery management system in real time and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy.
The embodiment of the invention also provides a device for monitoring the charging state of a vehicle, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the method for monitoring the charging state of the vehicle.
Compared with the prior art, the method and the device for monitoring the charging state of the vehicle and the vehicle are disclosed by the embodiment of the invention. The vehicle comprises a battery management system and an edge processor, wherein after a power battery of the vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy; in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters; the edge processor acquires the charging parameters sent by the battery management system in real time, and analyzes the thermal runaway risk level of the power battery according to the charging parameters; and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy. By adopting the technical means of the embodiment of the invention, the charging protection strategies are correspondingly arranged on the battery management system and the edge processor, so that the evaluation and monitoring of the charging state of the power battery in the charging process can be effectively realized, the user can be timely fed back when abnormal charging occurs, and the charging safety of the power battery is improved; and when monitoring that the risk of thermal runaway of the battery is high in the charging process, the edge processor generates a corresponding charging adjustment strategy and sends the charging adjustment strategy to the battery management system, so that the charging strategy is adjusted in time, the charging process is effectively optimized, and the charging safety of the power battery is further ensured.
Drawings
Fig. 1 is a schematic flow chart of a method for monitoring a state of charge of a vehicle according to an embodiment of the present invention in a first implementation;
FIG. 2 is a schematic diagram of the charging time period ratio of the battery pack at different temperature intervals according to the embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for monitoring a state of charge of a vehicle according to a second embodiment of the present invention;
fig. 4 is a diagram showing a relationship between a charge request current, a negative electrode potential, and a battery SOC in the embodiment of the invention;
fig. 5 is a schematic flowchart of a method for monitoring a state of charge of a vehicle according to a third embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a device for monitoring a state of charge of a vehicle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of a method for monitoring a state of charge of a vehicle according to an embodiment of the present invention in a first implementation manner is shown. In an embodiment of the present invention, the vehicle includes a battery management system and an edge processor, and the method for monitoring the state of charge of the vehicle provided in the embodiment of the present invention is cooperatively executed by the battery management system and the edge processor.
Specifically, the monitoring method of the state of charge performs through steps S11 to S14:
s11, after the power battery of the vehicle is connected with the charging pile in a charging mode, the battery management system requests the charging pile to be charged according to a preset charging strategy;
s12, in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time, and generates first fault alarm information when monitoring abnormal charging parameters;
s13, the edge processor acquires the charging parameters sent by the battery management system in real time, and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and S14, when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system to adjust the charging strategy.
In the embodiment of the invention, when a user judges that the vehicle has a charging requirement, a charging gun of the vehicle is inserted into a charging port of the charging pile, the charging connection between the power battery and the charging pile is established, and then the battery management system calculates the charging request current which accords with the current charging condition in real time through a preset charging strategy and requests the charging to the charging pile by using the charging request current.
In an optional implementation manner, in step S11, after the power battery of the vehicle establishes a charging connection with the charging pile, the battery management system requests the charging pile to be charged according to a preset charging policy, which specifically includes:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system calculates the current charging request current according to the battery state information of the power battery and a preset charging MAP (MAP) table, and requests the charging pile to be charged according to the charging request current; the charging MAP table records the corresponding relation between the battery state information and the charging request current.
It should be noted that the battery state information includes an SOC value of the power battery, a cell voltage, and a battery temperature. After the vehicle leaves a factory, an initial charging MAP table provided by a battery core supplier of the power battery is configured and stored in the vehicle, wherein the initial charging MAP table comprises a first charging MAP table recording the corresponding relation between the SOC value of the power battery, the battery temperature and the charging request current, and a second charging MAP table recording the corresponding relation between the single battery voltage of the power battery, the battery temperature and the charging request current.
For example, the first charge MAP table is shown in table 1, and the second charge MAP table is shown in table 2:
TABLE 1
TABLE 2
The numerical values in tables 1 and 2 are examples of calibration amounts and do not limit the present invention. In practical applications, the values in the first charging MAP table and the second charging MAP table are different according to actual conditions of different vehicles, and are not limited herein.
After a power battery of a vehicle is in charging connection with a charging pile, a battery management system acquires battery state information including an SOC value, a single battery voltage and a battery temperature, respectively queries the first charging MAP table and the second charging MAP table, correspondingly acquires two charging request currents, acquires a minimum value of the two charging request currents, and requests the charging pile to charge as the charging request current.
Preferably, after the charging pile is connected, the charging pile information of the charging pile can be fed back, and the charging pile information comprises a charging pile code, a maximum output current, a minimum output current and the like, in order to further improve the accuracy of the calculated charging request current, after the charging request current is calculated according to a charging MAP table, a battery management system evaluates the health degree and the charging capacity of the charging pile according to the charging pile information, adjusts the charging request current so that the adjusted charging request current is matched with the charging capacity of the charging pile, and takes the adjusted charging request current as the current charging request current to request the charging pile for charging.
Further, the battery management system performs a first layer of charge protection for the power battery. In the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time, wherein the charging parameters comprise charging socket temperature, power battery pack temperature, cell voltage, battery pack pressure and the like. Then, in step S12, the battery management system monitors the charging parameter of the power battery in real time, and generates a first fault warning message when the abnormal charging parameter is monitored, specifically including steps S121 to S123:
s121, monitoring the temperature of a charging socket of the power battery, the temperature of a power battery pack, the voltage of a battery core and the pressure in the battery pack in real time;
s122, judging whether the temperature of the charging socket exceeds a first preset temperature threshold, whether the temperature of the power battery pack exceeds a second preset temperature threshold, whether the voltage of the battery cell exceeds a preset voltage threshold, and whether the pressure in the battery pack exceeds a preset pressure threshold;
and S123, when any one of the conditions occurs, judging that the abnormal charging parameters are monitored, and generating first fault alarm information.
It should be noted that the first preset temperature threshold, the second preset temperature threshold, the preset voltage threshold, and the preset pressure threshold are preset according to the actual conditions of the corresponding charging parameters, for example, the first preset temperature threshold is 125 ℃, the second preset temperature threshold is 65 ℃, the preset voltage threshold is 4.4V, and the preset pressure threshold is 110kPa, which may be adjusted according to the actual conditions, and is not limited specifically herein.
And the charging parameters are not limited to the temperature of a charging socket, the temperature of a power battery pack, the voltage of a battery core and the pressure of the battery pack, and also comprise other parameters related to the charging process of the battery, the battery management system monitors the charging parameters in real time, generates corresponding first fault alarm information when any abnormal signal is monitored, and can push the first fault alarm information through a central control screen of a vehicle to remind a user.
Preferably, after generating the first fault alarm information when the abnormal charging parameter is monitored, the method further includes:
the battery management system sends the first fault alarm information to the edge processor;
and the edge processor uploads the first fault alarm information to a cloud processor so that the cloud processor executes a preset first charging protection strategy.
In the embodiment of the invention, when the battery management system monitors abnormal charging parameters and generates first fault alarm information, the first fault alarm information is uploaded to the cloud processor through the edge processor besides being pushed to inform a user, and the cloud processor sends the fault information to a host factory at the first time, so that the host factory can quickly respond and go to an event occurrence place for emergency repair and rescue, and the risk is quickly responded and reduced.
Further, the edge processor performs a second layer of charge protection for the power cell. In the charging process of the power battery, the battery management system sends the monitored charging parameters of the power battery to the edge processor in real time, and the edge processor analyzes the thermal runaway risk level of the power battery according to the charging parameters.
Preferably, in step S13, the edge processor analyzes the thermal runaway risk level of the power battery according to the charging parameter, and specifically includes:
and the edge processor determines a preset input value of an equivalent prediction model for predicting the thermal runaway risk level according to the charging parameters so as to calculate the thermal runaway risk level of the power battery.
The input values of the equivalent prediction model comprise the cell equalization time during charging, the charging time length ratio of the battery pack in different temperature intervals, the total charging capacity, the ratio of the direct current charging times to the total charging times, the current capacity of the battery, the historical capacity decay rate of the battery and the charging terminal pressure difference.
Specifically, according to the charging parameters of the power battery, input values such as the equalization time of each battery cell during charging, the charging time duration ratio of the battery pack in different temperature intervals, the total charging capacity, the direct current charging frequency ratio of the battery pack in the total charging frequency, the current capacity of the battery, the historical capacity decay rate of the battery, the differential pressure at the charging terminal and the like are determined as follows:
the cell equalization time during charging is as follows: the battery management system controls the equalization switches of each cell of the power battery and sends equalization switch states to the edge processor. When the equalization switch of a certain electric core is turned on in the charging process, the edge processor starts timing until the equalization switch of the electric core is turned off or the charging is finished, so that the equalization time of each electric core during charging is counted.
The charging time of the battery pack in different temperature intervals is as follows: fig. 2 is a schematic diagram of charging time periods of the battery pack in different temperature intervals according to the embodiment of the present invention. Presetting different temperature intervals, and counting the working time length in each temperature area according to the temperature area where the highest temperature of the battery pack is located during charging.
Total charge capacity: after charging is started, the battery management system can calculate the charging capacity of the current charging in real time, the specific method is an ampere-hour integral method, and the calculation is stopped after the current charging is finished to obtain the charging capacity of the current charging. The charging capacity of each charging of the vehicle from the time of shipment to the present time is accumulated to obtain the total charging capacity.
The direct current charging times account for the total charging times: there are two main types of charging, i.e., dc charging and ac charging. For example, the number of times of dc charging is 40, the number of times of ac charging is 60, the total number of times is 100, and the ratio of the number of times of dc charging to the total number of times of charging is 40%, so as to count the ratio of the number of times of dc charging to the total number of times of charging.
Current capacity of the battery: after a complete charging, the method for calculating the current capacity of the battery by the battery management system comprises the following steps: q is the ampere-hour integrated capacity value of the entire charging process/[ (SOC at the end of charging-SOC at the start of charging) × rated capacity ].
Battery historical capacity fade rate: according to the current capacity of the battery calculated by the battery management system, the edge processor can record the capacity value of the battery pack periodically, so that a capacity change curve of the battery pack in the whole life cycle can be obtained, and the decay rate Q can also be obtained according to the date and the delta Q, wherein the unit is Ah/month or Ah/year.
Charging end pressure difference: when charging is finished, the edge processor obtains a difference between the maximum cell voltage and the minimum cell voltage sent by the battery management system, namely a charging terminal pressure difference.
Further, analyzing the thermal runaway risk level of the power battery through a preset equivalent prediction model. The principle is as follows: when the balance switch of a certain battery cell is turned on more frequently, it is indicated that a large difference exists between the battery cell and other battery cells in the battery pack, the difference is an important index of consistency, the consistency state is poor, the health degree is low, and the risk of thermal runaway is high when the health degree is low. The temperature interval accounts for and directly shows the distribution of the working temperature of the battery pack, when the temperature is higher, the working time is longer, the aging is aggravated, the temperature rise under the same working condition is larger, and the thermal runaway risk is increased. The total charge capacity indicates the number of cycles of vehicle charging, the number of cycles indicates the state of aging, higher number of cycles is accompanied by higher risk of thermal runaway. The direct current charging working condition is more aggressive and worse than the alternating current charging, the charging speed can be greatly improved, but the direct current charging working condition belongs to a charging mode which severely consumes the service life of a battery pack, and the risk of increasing the internal resistance of the battery is changed, so that the temperature rise rate is faster than that of a vehicle which is mainly powered by alternating current under the same working condition, and the thermal runaway risk is increased. The battery capacity and its decay directly represent a decrease in the health of the battery, which indicates an increased risk of thermal runaway. The fact that the voltage difference at the tail end of the battery is too large indicates that the maximum voltage and the minimum voltage in the battery pack are different greatly, the difference is an important index of consistency, the consistency state is poor, the health degree is low, and the risk of thermal runaway is high when the health degree is low.
Further, when the thermal runaway risk level exceeds a preset standard level, second fault alarm information is generated, and pushing can be performed through a central control screen of the vehicle to remind a user. And meanwhile, generating a corresponding charging adjustment strategy, and sending the charging adjustment strategy to the battery management system to adjust the charging strategy, so that the power battery is safer in the later charging process, and more serious charging safety risks are avoided.
Preferably, when the thermal runaway risk level exceeds a preset standard level, the edge processor generates a charging adjustment strategy, which specifically includes: when the thermal runaway risk level exceeds a preset standard level, determining an adjustment proportion of a charging request current corresponding to each battery state information in the charging MAP table according to the value of the charging parameter so as to generate the charging adjustment strategy; the charging adjustment strategy is used for adjusting the charging MAP table.
In the embodiment of the invention, the battery management system determines the charging request current by inquiring the charging MAP table, so that the accuracy of the charging request current can be provided by adjusting the charging MAP table, and the reliability and the safety of the charging process requested to the charging pile are ensured.
As an example, with reference to table 1 and table 2, when the risk of thermal runaway is high, the charging request current in the MAP table is adjusted downward, and the amplitude of the downward adjustment is mainly determined together according to the values of the charging parameters, as an example, according to the equalization time of each battery cell during charging, when it is determined that the consistency attenuation exceeds 10%, the charging request current is adjusted downward by 2%; according to the current capacity and the capacity fading rate of the battery, when the capacity aging fading is judged to be 10%, the charging request current is reduced by 5%; and when the direct current charging use ratio of the whole year is judged to exceed 80 percent, the charging request current is reduced by 1 percent and the like according to the ratio of the direct current charging times to the total charging times.
It is to be understood that the numerical values referred to in the above scenarios are only examples and are not to be construed as limiting the invention. In practical application, the corresponding charging adjustment strategy can be determined according to actual conditions and thermal runaway risk degrees of different vehicles, and is not limited herein.
The embodiment of the invention provides a method for monitoring the charging state of a vehicle, wherein after a power battery of the vehicle is in charging connection with a charging pile, a battery management system requests the charging pile to be charged according to a preset charging strategy; in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters; the edge processor acquires the charging parameters sent by the battery management system in real time and analyzes the thermal runaway risk level of the power battery according to the charging parameters; and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy. By adopting the technical means of the embodiment of the invention, the charging protection strategies are correspondingly arranged on the battery management system and the edge processor, so that the evaluation and monitoring of the charging state of the power battery in the charging process can be effectively realized, the user can be timely fed back when abnormal charging occurs, and the charging safety of the power battery is improved; and when monitoring that the risk of thermal runaway of the battery is high in the charging process, the edge processor generates a corresponding charging adjustment strategy and sends the charging adjustment strategy to the battery management system, so that the charging strategy is adjusted in time, the charging process is effectively optimized, and the charging safety of the power battery is further ensured.
Fig. 3 is a schematic flow chart of a method for monitoring a state of charge of a vehicle according to an embodiment of the present invention in a second embodiment. The embodiment of the present invention is further implemented on the basis of the above embodiment, and the method for monitoring the charging state further includes step S15:
and S15, the edge processor uploads the charging parameters and the driving data of the vehicle to the cloud processor in real time, so that the cloud processor analyzes the lithium analysis condition and the internal short circuit state of the power battery according to the charging parameters and the driving data, and executes a preset second charging protection strategy according to the lithium analysis condition and the internal short circuit state.
In the embodiment of the invention, the cloud processor executes third-layer charging protection on the power battery, monitors the charging process in real time from the first charging of the vehicle, predicts the lithium analysis condition of the electrode of the battery by using an electrochemical model, and avoids a thermal runaway event caused by lithium analysis; meanwhile, the cloud end can comprehensively analyze the state of the short circuit in the cloud end according to the historical charging data and the driving data of the vehicle.
Specifically, the cloud processor analyzes the lithium analysis condition of the power battery as follows: referring to fig. 4, which is a schematic diagram of a relationship between a charge request current, a negative electrode potential and a battery SOC in the embodiment of the present invention, when the charge request current is too large, the negative electrode potential during charging may be lower than 0V, which indicates occurrence of lithium separation; when the charge request current is restored, the negative electrode potential rises back, but lithium deposition that had occurred before cannot be restored. The cloud processor integrates an electrochemical model for predicting the negative electrode potential of the battery, the input of the model is the sampling characteristics of the battery current, the battery voltage and the like, the output of the model is the negative electrode potential, and the model can calculate the negative electrode potential according to the response of the actual charging current and voltage to indicate the performance of analyzing lithium.
The cloud processor analyzes the internal short circuit state of the power battery as follows: after each charging, the vehicle is in a standing state and continues for a period of time, for example, 2 to 3 hours, the battery will stand to a stable state, but this does not indicate that the electric quantity inside the battery will not be reduced, because a micro short circuit phenomenon exists inside some battery cells, the battery capacity gradually decreases under the condition that no external electricity is used, which mainly represents the voltage decrease, so that the voltage decrease rate can be calculated according to the voltage decrease condition of the battery after the stable state for a period of time (at least 4 to 5 hours), and whether the micro short circuit exists inside the battery cell can be judged. When the voltage drop rate is too large, for example, over 5mv/h, which indicates that the self-discharge rate of the battery cell is too large, and there is an electric leakage condition, it is considered that the possibility of short circuit in the power battery is high.
When the condition that the lithium analysis or the internal short circuit state exists in the power battery is detected, the dangerous battery cells in the battery pack are identified, and information is fed back to a host factory before the dangerous battery cells affect other battery cells and outbreak thermal runaway, so that the risk of the thermal runaway is completely avoided before the early failure of the battery occurs.
By adopting the technical means of the embodiment of the invention, the evaluation and monitoring of the charging state of the power battery in the charging process are effectively realized through the cooperative management of the battery management system, the edge processor and the cloud processor, and multi-layer protection is provided for the charging process of the power battery, so that a user or a host factory can be informed in time when abnormal charging is monitored, the charging strategy is adjusted, the charging process is effectively optimized, and the charging safety of the power battery is further ensured.
Fig. 5 is a schematic flow chart of a method for monitoring a state of charge of a vehicle according to an embodiment of the present invention in a third embodiment. The embodiment of the present invention is further implemented on the basis of any of the above embodiments, and the method for detecting a charging state further includes steps S21 to S23:
s21, in the charging process of the power battery, the battery management system carries out charging pile quality evaluation according to charging pile information sent by the charging pile to generate a first quality evaluation result, and sends the charging pile state information and the first quality evaluation result to the edge processor;
s22, the edge processor compares the charging pile information, the first quality evaluation result and the charging parameters with historical charging pile data of the vehicle to evaluate and generate a second quality evaluation result;
and S23, binding the second quality evaluation result and the identity information of the charging pile, and sending the second quality evaluation result and the identity information to the battery management system for storage and display.
In the embodiment of the invention, the quality of the charging pile is evaluated in the charging process of the power battery, and the charging pile with better quality is selected for the vehicle to be charged, so that the charging process can be further optimized. Firstly, when a gun is plugged for charging, the battery management system records various parameter information of the charging pile, such as health state, service duration, maximum charging capacity and the like, according to a real-time message sent by the charging pile, gives a preliminary assessment in advance, and transmits all data and calculation results to the edge processor.
For example, when the battery management system sends a stable charging request current, the stability of the output current of the charging pile is judged according to the fluctuation frequency and the amplitude of the actual output current of the charging pile, and the larger the amplitude is, the higher the frequency is, the worse the stability of the charging pile is; when the charging request current sent by the battery management system changes, the current change should be immediately reflected in the output current of the charging pile, but current output delay occurs, and the charging pile responds more slowly the longer the delay is, so that the quality of the charging pile is evaluated, and a first quality evaluation result is generated.
It can be understood that the two examples are only used as partial embodiments for evaluating the quality of the charging pile by the battery management system, and in practical application, the quality of the charging pile can be evaluated according to other charging pile parameters, which is not described herein again.
Further, when the vehicle is charged, the battery management system can synchronously share message information sent by the charging pile to the edge processor, the message information comprises maximum current declared by the charging pile, actual charging current, production date, health degree and the like, the edge processor can collect all data in the whole charging process, calculate average current stability (stability is jointly determined by average fluctuation amplitude of output current of the charging pile in the up-and-down fluctuation of request current to average charging current ratio and fluctuation period to total charging time length ratio), average delay (average value of delay calculated by the battery management system in the whole charging period) and average difference (ratio of output current of the charging pile to request current) and the like, and compare and evaluate the data with historical charging pile data to generate a second quality evaluation result. These information can be saved in the memory cell of edge processor with this electric pile's of should filling health degree that battery management system judged together, fill electric pile code as the label for when this electric pile of next reuse fills, can directly send this evaluation of filling electric pile to the large-size screen after the rifle that charges is inserted. The evaluation of the single charging pile can be updated and adjusted along with the increase of the charging times of the charging pile, so that the evaluation is more accurate.
As a preferred embodiment, the method further comprises step S24:
and S24, the edge processor uploads the identity information and the second quality evaluation result of the charging pile to a cloud processor, so that the cloud processor ranks and evaluates the quality of each charging pile according to the identity information of the charging pile uploaded by different vehicles and the corresponding second quality evaluation result to obtain a third quality evaluation result, and the third quality evaluation result is issued to the battery management system for storage and display.
Specifically, the cloud processor can analyze the quality of the charging pile from multiple aspects: the cloud processor can utilize a standard evaluation model to subjectively evaluate the current charging pile, and the method mainly depends on comparing with standard charging pile rated parameters to obtain an evaluation result. And comprehensively comparing all charging piles within the city range, such as the charging speed, the over-temperature charging condition, the over-current charging condition and the like, to obtain the quality ranking of the charging piles, wherein the method is realized through a pile cloud network. And analyzing the situation of charge quality decline according to the historical data trend of the charging pile currently used, and judging whether the charging pile is in a short-term rapid failure situation. And finally, combining the grading results of the battery management system and the edge processor, giving a comprehensive grade, issuing the comprehensive grade to the battery management system all the way, sharing the grade to a mobile terminal of each vehicle owner, wherein the grade comprises a vehicle central control screen and a mobile phone APP, and helping a user to select a charging pile with higher evaluation and better quality before charging.
By adopting the technical means of the embodiment of the invention, in the vehicle charging process, the quality evaluation of the charging pile is realized layer by layer through the battery management system, the edge processor and the cloud processor, the charging state of the battery is further monitored, and a user is helped to select the charging pile with higher evaluation and better quality, so that the charging safety of the battery is improved.
Referring to fig. 6, which is a schematic structural diagram of a vehicle according to an embodiment of the present invention, the embodiment of the present invention provides a vehicle 30, which includes a battery management system 31 and an edge processor 32; wherein the content of the first and second substances,
after the power battery of the vehicle is in charging connection with the charging pile, the battery management system 31 requests charging from the charging pile according to a preset charging strategy;
in the charging process of the power battery, the battery management system 31 monitors the charging parameters of the power battery in real time, and generates first fault alarm information when monitoring abnormal charging parameters;
the edge processor 32 acquires the charging parameters sent by the battery management system in real time, and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system 31 to adjust the charging strategy.
Preferably, after first fault alarm information is generated when the abnormal charging parameter is monitored, the battery management system sends the first fault alarm information to the edge processor; and the edge processor uploads the first fault alarm information to a cloud processor so that the cloud processor executes a preset first charging protection strategy.
Preferably, the charging parameters include charging socket temperature, power battery pack temperature, cell voltage and battery pack pressure;
then, the battery management system monitors the charging parameters of the power battery in real time, and generates a first fault alarm message when monitoring the abnormal charging parameters, which specifically includes:
monitoring the charging socket temperature of the power battery, the temperature of a power battery pack, the voltage of a battery core and the pressure in the battery pack in real time;
judging whether the temperature of the charging socket exceeds a first preset temperature threshold, whether the temperature of the power battery pack exceeds a second preset temperature threshold, whether the voltage of the battery core exceeds a preset voltage threshold, and whether the pressure in the battery pack exceeds a preset pressure threshold;
when any one of the conditions occurs, judging that the abnormal charging parameters are monitored, and generating first fault alarm information.
Preferably, the edge processor analyzes the thermal runaway risk level of the power battery according to the charging parameter, and specifically includes:
the edge processor determines a preset input value of an equivalent prediction model for predicting the thermal runaway risk level according to the charging parameters so as to calculate the thermal runaway risk level of the power battery;
the input values of the equivalent prediction model comprise the cell equalization time during charging, the charging time length ratio of the battery pack in different temperature intervals, the total charging capacity, the ratio of the direct current charging times to the total charging times, the current capacity of the battery, the historical capacity decay rate of the battery and the charging terminal pressure difference.
Preferably, after the power battery of the vehicle is connected to the charging pile for charging, the battery management system requests the charging pile for charging according to a preset charging strategy, and the method specifically includes:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system calculates the current charging request current according to the battery state information of the power battery and a preset charging MAP (MAP) table, and requests the charging pile to be charged by the charging request current; the charging MAP table records the corresponding relation between the battery state information and the charging request current;
then, when the thermal runaway risk level exceeds a preset standard level, generating a charging adjustment strategy, specifically including:
when the thermal runaway risk level exceeds a preset standard level, determining an adjustment proportion of a charging request current corresponding to each battery state information in the charging MAP table according to the value of the charging parameter so as to generate the charging adjustment strategy; the charging adjustment strategy is used for adjusting the charging MAP table.
Preferably, the edge processor uploads the charging parameters and the driving data of the vehicle to the cloud processor in real time, so that the cloud processor analyzes the lithium analysis condition and the internal short circuit state of the power battery according to the charging parameters and the driving data, and executes a preset second charging protection strategy according to the lithium analysis condition and the internal short circuit state.
By adopting the technical means of the embodiment of the invention, the evaluation and monitoring of the charging state of the power battery in the charging process are effectively realized through the cooperative management of the battery management system, the edge processor and the cloud processor, and multi-layer protection is provided for the charging process of the power battery, so that a user or a host factory can be informed in time when abnormal charging is monitored, a charging strategy is adjusted, the charging process is effectively optimized, and the charging safety of the power battery is further ensured.
Preferably, in the charging process of the power battery, the battery management system performs quality evaluation on the charging pile according to charging pile information sent by the charging pile to generate a first quality evaluation result, and sends the charging pile state information and the first quality evaluation result to the edge processor;
the edge processor compares and evaluates the charging pile information, the first quality evaluation result and the charging parameters with historical charging pile data of the vehicle according to the charging pile information, the first quality evaluation result and the charging parameters which are received currently to generate a second quality evaluation result;
and binding the second quality evaluation result with the identity information of the charging pile, and issuing the second quality evaluation result to the battery management system for storage and display.
And the edge processor uploads the identity information and the second quality evaluation result of the charging pile to a cloud processor, so that the cloud processor ranks and evaluates the quality of each charging pile according to the identity information of the charging pile uploaded by different vehicles and the corresponding second quality evaluation result to obtain a third quality evaluation result, and sends the third quality evaluation result to the battery management system for storage and display.
By adopting the technical means of the embodiment of the invention, in the vehicle charging process, the quality evaluation of the charging pile is realized layer by layer through the battery management system, the edge processor and the cloud processor, the charging state of the battery is further monitored, and a user is helped to select the charging pile with higher evaluation and better quality, so that the charging safety of the battery is improved.
Fig. 7 is a schematic structural diagram of a device for monitoring a charging state of a vehicle according to an embodiment of the present invention. The embodiment of the invention provides a device 40 for monitoring the charging state of a vehicle, which comprises a processor 41, a memory 42 and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the method for monitoring the charging state of the vehicle according to any one of the embodiments.
It should be noted that the monitoring device for a vehicle charging state provided in the embodiment of the present invention is used for executing all the process steps of the monitoring method for a vehicle charging state of the above embodiment, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that details are not repeated.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method of monitoring a state of charge of a vehicle, the vehicle including a battery management system and an edge processor, the method comprising:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy;
in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters;
the edge processor acquires the charging parameters sent by the battery management system in real time and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy.
2. The method of monitoring a state of charge of a vehicle according to claim 1, wherein after generating first failure warning information when the abnormal charging parameter is monitored, the method further comprises:
the battery management system sends the first fault alarm information to the edge processor;
and the edge processor uploads the first fault alarm information to a cloud processor so that the cloud processor executes a preset first charging protection strategy.
3. The method of monitoring the state of charge of a vehicle according to claim 2, characterized in that the method further comprises:
and the edge processor uploads the charging parameters and the driving data of the vehicle to the cloud processor in real time, so that the cloud processor analyzes the lithium analysis condition and the internal short circuit state of the power battery according to the charging parameters and the driving data, and executes a preset second charging protection strategy according to the lithium analysis condition and the internal short circuit state.
4. The method of monitoring a state of charge of a vehicle of claim 1, wherein the charging parameters include a charging outlet temperature, a power pack temperature, a cell voltage, and a pack pressure;
then, the battery management system monitors the charging parameters of the power battery in real time, and generates a first fault alarm message when monitoring the abnormal charging parameters, which specifically includes:
monitoring the charging socket temperature of the power battery, the temperature of a power battery pack, the voltage of a battery core and the pressure in the battery pack in real time;
judging whether the temperature of the charging socket exceeds a first preset temperature threshold, whether the temperature of the power battery pack exceeds a second preset temperature threshold, whether the voltage of the battery core exceeds a preset voltage threshold, and whether the pressure in the battery pack exceeds a preset pressure threshold;
when any one of the conditions occurs, judging that the abnormal charging parameters are monitored, and generating first fault alarm information.
5. The method for monitoring the state of charge of a vehicle according to claim 1, wherein the edge processor analyzes the thermal runaway risk level of the power battery according to the charging parameter, and specifically comprises:
the edge processor determines a preset input value of an equivalent prediction model for predicting the thermal runaway risk level according to the charging parameters so as to calculate the thermal runaway risk level of the power battery;
the input values of the equivalent prediction model comprise the cell equalization time during charging, the charging time length ratio of the battery pack in different temperature intervals, the total charging capacity, the ratio of the direct current charging times to the total charging times, the current capacity of the battery, the historical capacity decay rate of the battery and the charging terminal pressure difference.
6. The method for monitoring the charging state of the vehicle according to claim 1 or 5, wherein after the power battery of the vehicle is connected to the charging post in a charging manner, the battery management system requests the charging post to charge according to a preset charging strategy, and specifically comprises:
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system calculates the current charging request current according to the battery state information of the power battery and a preset charging MAP (MAP) table, and requests the charging pile to be charged by the charging request current; the charging MAP table records the corresponding relation between the battery state information and the charging request current;
then, when the thermal runaway risk level exceeds a preset standard level, generating a charging adjustment strategy, specifically including:
when the thermal runaway risk level exceeds a preset standard level, determining an adjustment proportion of a charging request current corresponding to each battery state information in the charging MAP table according to the value of the charging parameter so as to generate the charging adjustment strategy; the charging adjustment strategy is used for adjusting the charging MAP table.
7. The method of monitoring the state of charge of a vehicle of claim 1, further comprising:
in the charging process of the power battery, the battery management system carries out charging pile quality evaluation according to charging pile information sent by the charging pile to generate a first quality evaluation result, and sends charging pile state information and the first quality evaluation result to the edge processor;
the edge processor compares and evaluates the charging pile information, the first quality evaluation result and the charging parameters with historical charging pile data of the vehicle according to the charging pile information, the first quality evaluation result and the charging parameters which are received currently to generate a second quality evaluation result;
and binding the second quality evaluation result and the identity information of the charging pile, and issuing the second quality evaluation result and the identity information to the battery management system for storage and display.
8. The method of monitoring the state of charge of a vehicle of claim 7, further comprising:
and the edge processor uploads the identity information and the second quality evaluation result of the charging pile to a cloud processor, so that the cloud processor ranks and evaluates the quality of each charging pile according to the identity information of the charging pile uploaded by different vehicles and the corresponding second quality evaluation result to obtain a third quality evaluation result, and sends the third quality evaluation result to the battery management system for storage and display.
9. A vehicle comprising a battery management system and an edge processor;
after a power battery of a vehicle is in charging connection with a charging pile, the battery management system requests the charging pile to be charged according to a preset charging strategy;
in the charging process of the power battery, the battery management system monitors the charging parameters of the power battery in real time and generates first fault alarm information when monitoring abnormal charging parameters;
the edge processor acquires the charging parameters sent by the battery management system in real time and analyzes the thermal runaway risk level of the power battery according to the charging parameters;
and when the thermal runaway risk level exceeds a preset standard level, generating second fault alarm information and a charging adjustment strategy, and sending the charging adjustment strategy to the battery management system so as to adjust the charging strategy.
10. A device for monitoring a state of charge of a vehicle, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the method for monitoring a state of charge of a vehicle according to any one of claims 1 to 8 when executing the computer program.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115657552A (en) * | 2022-10-25 | 2023-01-31 | 孙翀 | New energy automobile battery fire safety intelligent monitoring control system and method |
| CN115902656A (en) * | 2022-11-14 | 2023-04-04 | 上海玫克生储能科技有限公司 | 2/3/4-wheel electric vehicle battery detection method and system, storage medium and charging pile |
| CN117538767A (en) * | 2024-01-09 | 2024-02-09 | 中汽研新能源汽车检验中心(天津)有限公司 | Electric vehicle charging and discharging process vehicle-pile cooperative state monitoring system and method |
| CN117748688A (en) * | 2024-01-30 | 2024-03-22 | 中煤科工机器人科技有限公司 | Automatic charging management system for four-differential wheel type inspection robot |
| CN117748688B (en) * | 2024-01-30 | 2024-07-05 | 中煤科工机器人科技有限公司 | Automatic charging management system for four-differential wheel type inspection robot |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115657552A (en) * | 2022-10-25 | 2023-01-31 | 孙翀 | New energy automobile battery fire safety intelligent monitoring control system and method |
| CN115902656A (en) * | 2022-11-14 | 2023-04-04 | 上海玫克生储能科技有限公司 | 2/3/4-wheel electric vehicle battery detection method and system, storage medium and charging pile |
| CN117538767A (en) * | 2024-01-09 | 2024-02-09 | 中汽研新能源汽车检验中心(天津)有限公司 | Electric vehicle charging and discharging process vehicle-pile cooperative state monitoring system and method |
| CN117538767B (en) * | 2024-01-09 | 2024-03-22 | 中汽研新能源汽车检验中心(天津)有限公司 | Electric vehicle charging and discharging process vehicle-pile cooperative state monitoring system and method |
| CN117748688A (en) * | 2024-01-30 | 2024-03-22 | 中煤科工机器人科技有限公司 | Automatic charging management system for four-differential wheel type inspection robot |
| CN117748688B (en) * | 2024-01-30 | 2024-07-05 | 中煤科工机器人科技有限公司 | Automatic charging management system for four-differential wheel type inspection robot |
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