CN114683956A - Electric vehicle battery management system - Google Patents
Electric vehicle battery management system Download PDFInfo
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- CN114683956A CN114683956A CN202210426755.2A CN202210426755A CN114683956A CN 114683956 A CN114683956 A CN 114683956A CN 202210426755 A CN202210426755 A CN 202210426755A CN 114683956 A CN114683956 A CN 114683956A
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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
- 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
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
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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
Abstract
The invention belongs to the technical field of battery management, and discloses an electric vehicle battery management system, which comprises: the device comprises a state information acquisition module, a correction module, a load information acquisition module, a residual electric quantity estimation module, a charge and discharge control module, a battery balance management module, a state detection module, a service life prediction module, a fault early warning module, an interruption protection module, a data transmission module and a display module. The invention can timely warn and terminate when data in a certain state is abnormal or the battery fails, thereby improving the safety of battery protection and realizing overcurrent protection, over-temperature protection and over-discharge protection of the battery of the electric vehicle. The method and the device can monitor the relevant information and the current state of the electric vehicle battery, help to master the condition of the electric vehicle battery in time, and facilitate finding out the fault reason after the electric vehicle battery has a fault. The invention has various functions and high safety, can give an early warning and guarantee in time, and can comprehensively, objectively and accurately reflect the current state of the battery.
Description
Technical Field
The invention belongs to the technical field of battery management, and particularly relates to a battery management system of an electric vehicle.
Background
At present, the current state of a battery is judged through management research of battery energy, the current dynamic state of the battery can be effectively controlled and mastered, the electric quantity of each single battery can be monitored, the charging and discharging states of an individual battery and an integral battery can be adjusted, the residual electric quantity of the battery is critical in the use of an electric vehicle, the effective and safe driving mileage can be realized by accurately measuring the residual electric quantity of the battery, and the residual electric quantity of the battery and the electric energy of the battery can be interfered and influenced by factors in various aspects, so that a battery management system can effectively plan the condition influence of factors such as temperature, self-discharge, self-loss and the like, effective loop calculation is formed, and the research of the battery energy management system of the electric vehicle is very important.
The battery management system of the existing electric vehicle can only protect the safety of the lithium battery, prevent the lithium battery from being overcharged and overdischarged, cannot play other roles, and has single function.
Through the above analysis, the problems and defects of the prior art are as follows: the battery management system of the existing electric vehicle can only protect the safety of the lithium battery, prevent the lithium battery from being overcharged and overdischarged, cannot play other roles, and has single function.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a battery management system of an electric vehicle.
The present invention is achieved as such, an electric vehicle battery management system, comprising:
the residual electric quantity estimation module is connected with the central control module and is used for estimating the residual electric quantity of the electric vehicle battery based on the corrected state information of the electric vehicle battery;
the charging and discharging control module is connected with the central control module and is used for carrying out battery charging and discharging control based on the estimated electric vehicle battery residual electric quantity value and the current load information of the electric vehicle;
the battery balance management module is connected with the central control module and is used for carrying out balance management on each battery of the electric vehicle based on the estimated residual electric quantity value of the electric vehicle battery and the current load information of the electric vehicle in combination with the corrected state information of each battery of the electric vehicle;
the state detection module is connected with the central control module and used for detecting the current working state of the electric vehicle battery and judging whether the electric vehicle battery is in a fault state;
the service life prediction module is connected with the central control module and used for predicting the service life of the battery of the electric vehicle based on the acquired information;
and the interrupt protection module is connected with the central control module and is used for immediately interrupting the work of the battery when the detected current state data of the electric vehicle battery reaches an interrupt threshold value.
Further, the electric vehicle battery management system further includes:
the state information acquisition module is connected with the central control module and is used for acquiring current, voltage and temperature data of each battery of the electric vehicle in a charging and discharging state;
the correction module is connected with the central control module and is used for correcting the acquired state information of each battery of the electric vehicle;
the load information acquisition module is connected with the central control module and is used for acquiring the current load information of the electric vehicle;
the central control module is connected with the state information acquisition module, the correction module, the load information acquisition module, the residual electric quantity estimation module, the charge and discharge control module, the battery balance management module, the state detection module, the service life prediction module, the fault early warning module, the interrupt protection module, the data transmission module and the display module and is used for controlling each module to normally work by utilizing a single chip microcomputer or a controller;
the fault early warning module is connected with the central control module and is used for utilizing the alarm to carry out fault early warning when the current fault state of the battery of the electric vehicle is detected or certain state data exceeds a preset normal threshold range;
the data transmission module is connected with the central control module and is used for carrying out data transmission and interactive communication by utilizing a wired, wireless or other communication transmission mode;
and the display module is connected with the central control module and is used for displaying the acquired state information of the electric vehicle battery, the estimated residual capacity, the predicted battery life and other information by using the display equipment.
Further, the state information collecting module includes:
the current acquisition unit is used for acquiring the current value of each battery of the electric vehicle in a charging and discharging state;
the voltage acquisition unit is used for acquiring voltage values of each battery of the electric vehicle in a charging and discharging state;
and the temperature acquisition unit is used for acquiring the temperature of each battery of the electric vehicle in a charging and discharging state and in real time.
Further, the correction module is used for correcting the acquired state information of each battery of the electric vehicle and comprises the following steps:
firstly, compensating the temperature and the charging and discharging errors of the acquired voltage and current data of each battery of the electric vehicle;
and secondly, correcting the state information of each battery of the complete electric vehicle after compensation according to the dynamic impedance of the battery of the electric vehicle.
Further, the performing temperature data compensation on the acquired state information of each battery of the electric vehicle includes:
acquiring the real-time temperature of the acquired electric vehicle battery, determining a temperature compensation model according to the real-time temperature of the electric vehicle battery, and performing temperature compensation on the acquired current and voltage data of each battery of the electric vehicle.
Further, the estimation module of the residual capacity of the electric vehicle battery based on the corrected state information of the electric vehicle battery comprises the following steps:
firstly, acquiring the estimated value of the residual capacity of the battery stored in the last power-off process, and acquiring the real-time residual capacity of the battery;
secondly, calculating an average value of the estimated value of the residual capacity of the battery stored in the last power failure and the obtained real-time residual capacity of the battery to obtain an initial residual capacity value of the battery of the electric vehicle;
finally, determining the real-time discharge depth of the battery according to the corresponding relation between the battery voltage and the discharge depth; and obtaining estimated electric quantity based on the initial residual electric quantity value of the electric vehicle battery and the real-time discharge depth of the battery in combination with an extended Kalman algorithm.
Further, the acquiring the real-time remaining capacity of the battery comprises: and respectively measuring the real-time residual capacity of the battery by using an open-circuit voltage algorithm and an internal resistance measurement method.
Another object of the present invention is to provide a computer apparatus comprising a memory and a processor, the memory storing a computer program, the computer program, when executed by the processor, causing the processor to implement the electric vehicle battery management system as follows:
acquiring current, voltage and temperature data of each battery of the electric vehicle in a charging and discharging state through a state information acquisition module; the collected state information of each battery of the electric vehicle is corrected through a correction module; acquiring current load information of the electric vehicle through a load information acquisition module;
secondly, the central control module utilizes a single chip microcomputer or a controller to control a residual electric quantity estimation module to estimate the residual electric quantity of the electric vehicle battery based on the corrected state information of the electric vehicle battery; the charging and discharging control module is used for controlling the charging and discharging of the battery based on the estimated residual electric quantity value of the battery of the electric vehicle and the current load information of the electric vehicle;
step three, carrying out balance management on each battery of the electric vehicle by the battery balance management module based on the estimated residual electric quantity value of the electric vehicle battery and the current load information of the electric vehicle in combination with the corrected state information of each battery of the electric vehicle; detecting the current working state of the battery of the electric vehicle through a state detection module, and judging whether the battery is in a fault state;
step four, predicting the service life of the battery of the electric vehicle based on the acquired information through a service life prediction module; when the current fault state of the battery of the electric vehicle is detected or certain state data exceeds a preset normal threshold range through a fault early warning module, utilizing an alarm to carry out fault early warning; the method comprises the steps that the battery work is immediately interrupted when the detected current state data of the electric vehicle battery reaches an interruption threshold value through an interruption protection module;
fifthly, data transmission and interactive communication are carried out through the data transmission module by utilizing a wired, wireless or other communication transmission mode; and displaying the acquired state information of the electric vehicle battery, the estimated residual capacity, the predicted battery life and other information by using the display device through the display module.
It is another object of the present invention to provide a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the electric vehicle battery management system.
Another object of the present invention is to provide an information data processing terminal, wherein the information data processing terminal is configured to implement the electric vehicle battery management system.
In combination with the technical solutions and the technical problems to be solved, please analyze the advantages and positive effects of the technical solutions to be protected in the present invention from the following aspects:
first, aiming at the technical problems existing in the prior art and the difficulty in solving the problems, the technical problems to be solved by the technical scheme of the present invention are closely combined with results, data and the like in the research and development process, and some creative technical effects are brought after the problems are solved. The specific description is as follows:
the invention can timely warn and terminate when data in a certain state is abnormal or the battery fails, thereby improving the safety of battery protection and realizing overcurrent protection, over-temperature protection and over-discharge protection of the battery of the electric vehicle.
The method and the device can monitor the relevant information and the current state of the electric vehicle battery, help to master the condition of the electric vehicle battery in time, and facilitate finding out the fault reason after the electric vehicle battery has a fault.
The invention can carry out charge and discharge management and battery balance management of the battery according to the current residual electric quantity and load condition and by combining the state information of the battery, furthest develops the potential of the battery under the condition of ensuring the safe use of the battery and not damaging the service life, and realizes the endurance as long as possible under the state of the lowest electric quantity.
Secondly, considering the technical scheme as a whole or from the perspective of products, the technical effect and advantages of the technical scheme to be protected by the invention are specifically described as follows:
the electric vehicle battery management system has various functions, is high in safety, can give an early warning and guarantee in time, and can comprehensively, objectively and accurately reflect the current state of the battery.
Drawings
FIG. 1 is a schematic structural diagram of a battery management system of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a state information collection module according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for correcting acquired state information of each battery of an electric vehicle by a correction module according to an embodiment of the present invention;
in the figure: 1. a state information acquisition module; 2. a correction module; 3. a load information acquisition module; 4. a central control module; 5. a remaining power estimation module; 6. a charge and discharge control module; 7. a battery equalization management module; 8. a state detection module; 9. a life prediction module; 10. a fault early warning module; 11. an interrupt protection module; 12. a data transmission module; 13. a display module; 14. a current collection unit; 15. a voltage acquisition unit; 16. and a temperature acquisition unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First, an embodiment is explained. This section is an explanatory embodiment expanding on the claims so as to fully understand how the present invention is embodied by those skilled in the art.
As shown in fig. 1, an electric vehicle battery management system according to an embodiment of the present invention includes:
the state information acquisition module 1 is connected with the central control module and is used for acquiring current, voltage and temperature data of each battery of the electric vehicle in a charging and discharging state;
the correction module 2 is connected with the central control module 4 and is used for correcting the acquired state information of each battery of the electric vehicle;
the load information acquisition module 3 is connected with the central control module 4 and is used for acquiring the current load information of the electric vehicle;
the central control module 4 is connected with the state information acquisition module 1, the correction module 2, the load information acquisition module 3, the residual electric quantity estimation module 5, the charge and discharge control module 6, the battery balance management module 7, the state detection module 8, the service life prediction module 9, the fault early warning module 10, the interrupt protection module 11, the data transmission module 12 and the display module 13, and is used for controlling each module to normally work by utilizing a single chip microcomputer or a controller;
the residual electric quantity estimation module 5 is connected with the central control module 4 and is used for estimating the residual electric quantity of the electric vehicle battery based on the corrected state information of the electric vehicle battery;
the charging and discharging control module 6 is connected with the central control module 4 and is used for carrying out battery charging and discharging control based on the estimated electric vehicle battery residual electric quantity value and the current load information of the electric vehicle;
the battery balance management module 7 is connected with the central control module 4 and is used for carrying out balance management on each battery of the electric vehicle based on the estimated residual electric quantity value of the electric vehicle battery and the current load information of the electric vehicle in combination with the corrected state information of each battery of the electric vehicle;
the state detection module 8 is connected with the central control module 4 and is used for detecting the current working state of the electric vehicle battery and judging whether the electric vehicle battery is in a fault state;
the service life prediction module 9 is connected with the central control module 4 and used for predicting the service life of the electric vehicle battery based on the collected information;
the fault early warning module 10 is connected with the central control module 4 and is used for utilizing an alarm to carry out fault early warning when the current fault state of the battery of the electric vehicle is detected or data of a certain state exceeds a preset normal threshold range;
the interrupt protection module 11 is connected with the central control module 4 and used for immediately interrupting the work of the battery when the detected current state data of the electric vehicle battery reaches an interrupt threshold value;
the data transmission module 12 is connected with the central control module 4 and is used for carrying out data transmission and interactive communication by utilizing a wired, wireless or other communication transmission mode;
and the display module 13 is connected with the central control module 4 and is used for displaying the collected state information of the electric vehicle battery, the estimated residual capacity, the predicted battery life and other information by using a display device.
As shown in fig. 2, a state information collecting module 1 provided in the embodiment of the present invention includes:
the current acquisition unit 14 is used for acquiring current values of each battery of the electric vehicle in a charging and discharging state;
the voltage acquisition unit 15 is used for acquiring voltage values of each battery of the electric vehicle in a charging and discharging state;
and the temperature acquisition unit 16 is used for acquiring the temperature of each battery of the electric vehicle in a charging and discharging state and in real time.
As shown in fig. 3, the correction module provided in the embodiment of the present invention performs correction processing on the collected state information of each battery of the electric vehicle, including:
s101, compensating the acquired voltage and current data of each battery of the electric vehicle for temperature and charge-discharge errors;
and S102, correcting the state information of each battery of the complete electric vehicle after compensation according to the dynamic impedance of the battery of the electric vehicle.
The embodiment of the invention provides temperature data compensation for the acquired state information of each battery of the electric vehicle, which comprises the following steps:
acquiring the real-time temperature of the acquired electric vehicle battery, determining a temperature compensation model according to the real-time temperature of the electric vehicle battery, and performing temperature compensation on the acquired current and voltage data of each battery of the electric vehicle.
The residual capacity estimation module provided by the embodiment of the invention carries out the estimation of the residual capacity of the electric vehicle battery based on the corrected state information of the electric vehicle battery, and comprises the following steps:
firstly, acquiring the estimated value of the residual capacity of the battery stored in the last power-off process, and acquiring the real-time residual capacity of the battery;
secondly, calculating an average value of the estimated value of the residual capacity of the battery stored in the last power failure and the obtained real-time residual capacity of the battery to obtain an initial residual capacity value of the battery of the electric vehicle;
finally, determining the real-time discharge depth of the battery according to the corresponding relation between the battery voltage and the discharge depth; and obtaining estimated electric quantity based on the initial residual electric quantity value of the electric vehicle battery and the real-time discharge depth of the battery in combination with an extended Kalman algorithm.
The method for acquiring the real-time remaining power of the battery provided by the embodiment of the invention comprises the following steps: and respectively measuring the real-time residual electric quantity of the battery by utilizing an open-circuit voltage algorithm and an internal resistance measurement method.
And II, application embodiment. In order to prove the creativity and the technical value of the technical scheme of the invention, the part is an application example of the technical scheme of the claims to a specific product or related technology.
An application embodiment of the present invention provides a computer device, which includes a memory and a processor, the memory storing a computer program, the computer program, when executed by the processor, causing the processor to implement the electric vehicle battery management system.
An application embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement the electric vehicle battery management system.
The application embodiment of the invention provides an information data processing terminal, which is used for realizing the electric vehicle battery management system.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An electric vehicle battery management system, comprising:
the residual electric quantity estimation module is connected with the central control module and is used for estimating the residual electric quantity of the electric vehicle battery based on the corrected state information of the electric vehicle battery;
the charging and discharging control module is connected with the central control module and is used for carrying out battery charging and discharging control based on the estimated electric vehicle battery residual electric quantity value and the current load information of the electric vehicle;
the battery balance management module is connected with the central control module and is used for carrying out balance management on each battery of the electric vehicle based on the estimated residual electric quantity value of the electric vehicle battery and the current load information of the electric vehicle in combination with the corrected state information of each battery of the electric vehicle;
the state detection module is connected with the central control module and is used for detecting the current working state of the battery of the electric vehicle and judging whether the battery is in a fault state;
the service life prediction module is connected with the central control module and used for predicting the service life of the electric vehicle battery based on the collected information;
and the interrupt protection module is connected with the central control module and is used for immediately interrupting the work of the battery when the detected current state data of the electric vehicle battery reaches an interrupt threshold value.
2. The electric vehicle battery management system of claim 1, further comprising:
the state information acquisition module is connected with the central control module and is used for acquiring current, voltage and temperature data of each battery of the electric vehicle in a charging and discharging state;
the correction module is connected with the central control module and is used for correcting the acquired state information of each battery of the electric vehicle;
the load information acquisition module is connected with the central control module and is used for acquiring the current load information of the electric vehicle;
the central control module is connected with the state information acquisition module, the correction module, the load information acquisition module, the residual electric quantity estimation module, the charge and discharge control module, the battery balance management module, the state detection module, the service life prediction module, the fault early warning module, the interrupt protection module, the data transmission module and the display module and is used for controlling each module to normally work by utilizing a single chip microcomputer or a controller;
the fault early warning module is connected with the central control module and is used for utilizing the alarm to carry out fault early warning when the current fault state of the battery of the electric vehicle is detected or certain state data exceeds a preset normal threshold range;
the data transmission module is connected with the central control module and is used for carrying out data transmission and interactive communication by utilizing a wired, wireless or other communication transmission mode;
and the display module is connected with the central control module and is used for displaying the acquired state information of the electric vehicle battery, the estimated residual capacity, the predicted battery life and other information by using the display equipment.
3. The electric vehicle battery management system of claim 2, wherein the state information collection module comprises:
the current acquisition unit is used for acquiring the current value of each battery of the electric vehicle in a charging and discharging state;
the voltage acquisition unit is used for acquiring voltage values of each battery of the electric vehicle in a charging and discharging state;
and the temperature acquisition unit is used for acquiring the temperature of each battery of the electric vehicle in a charging and discharging state and in real time.
4. The battery management system for electric vehicles as claimed in claim 1, wherein the correcting module for correcting the collected status information of each battery of the electric vehicle comprises:
firstly, compensating the temperature and the charging and discharging errors of the acquired voltage and current data of each battery of the electric vehicle;
and secondly, correcting the state information of each battery of the complete electric vehicle after compensation according to the dynamic impedance of the battery of the electric vehicle.
5. The electric vehicle battery management system of claim 4, wherein the compensating the collected state information of the electric vehicle for the temperature data comprises:
acquiring the real-time temperature of the acquired electric vehicle battery, determining a temperature compensation model according to the real-time temperature of the electric vehicle battery, and performing temperature compensation on the acquired current and voltage data of each battery of the electric vehicle.
6. The electric vehicle battery management system of claim 1, wherein the remaining capacity estimation module performs electric vehicle battery remaining capacity estimation based on the corrected state information of the electric vehicle battery comprises the steps of:
firstly, acquiring the estimated value of the residual capacity of the battery stored in the last power-off process, and acquiring the real-time residual capacity of the battery;
secondly, calculating an average value of the estimated value of the residual capacity of the battery stored in the last power failure and the obtained real-time residual capacity of the battery to obtain an initial residual capacity value of the battery of the electric vehicle;
finally, determining the real-time discharge depth of the battery according to the corresponding relation between the battery voltage and the discharge depth; and obtaining estimated electric quantity based on the initial residual electric quantity value of the electric vehicle battery and the real-time discharge depth of the battery in combination with an extended Kalman algorithm.
7. The electric vehicle battery management system of claim 6, wherein obtaining the real-time remaining capacity of the battery comprises: and respectively measuring the real-time residual electric quantity of the battery by utilizing an open-circuit voltage algorithm and an internal resistance measurement method.
8. A computer arrangement, characterized in that the computer arrangement comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the steps of the electric vehicle battery management system according to any one of claims 1-7:
acquiring current, voltage and temperature data of each battery of the electric vehicle in a charging and discharging state through a state information acquisition module; the collected state information of each battery of the electric vehicle is corrected through a correction module; acquiring current load information of the electric vehicle through a load information acquisition module;
secondly, the central control module utilizes a single chip microcomputer or a controller to control a residual electric quantity estimation module to estimate the residual electric quantity of the electric vehicle battery based on the corrected state information of the electric vehicle battery; the charging and discharging control module is used for controlling the charging and discharging of the battery based on the estimated residual electric quantity value of the battery of the electric vehicle and the current load information of the electric vehicle;
step three, carrying out balance management on each battery of the electric vehicle by the battery balance management module based on the estimated residual electric quantity value of the electric vehicle battery and the current load information of the electric vehicle in combination with the corrected state information of each battery of the electric vehicle; detecting the current working state of the battery of the electric vehicle through a state detection module, and judging whether the battery is in a fault state;
fourthly, predicting the service life of the battery of the electric vehicle based on the acquired information through a service life prediction module; when the current fault state of the battery of the electric vehicle is detected or certain state data exceeds a preset normal threshold range through a fault early warning module, utilizing an alarm to carry out fault early warning; the method comprises the steps that the battery work is immediately interrupted when the detected current state data of the electric vehicle battery reaches an interruption threshold value through an interruption protection module;
fifthly, data transmission and interactive communication are carried out through the data transmission module by utilizing a wired, wireless or other communication transmission mode; and displaying the acquired state information of the electric vehicle battery, the estimated residual capacity, the predicted battery life and other information by using the display device through the display module.
9. A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the electric vehicle battery management system of any one of claims 1-7.
10. An information data processing terminal, characterized in that the information data processing terminal is used for implementing the electric vehicle battery management system according to any one of claims 1 to 7.
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| CN202210426755.2A CN114683956A (en) | 2022-04-22 | 2022-04-22 | Electric vehicle battery management system |
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| CN202210426755.2A CN114683956A (en) | 2022-04-22 | 2022-04-22 | Electric vehicle battery management system |
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| CN202210426755.2A Withdrawn CN114683956A (en) | 2022-04-22 | 2022-04-22 | Electric vehicle battery management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932842A (en) * | 2022-07-21 | 2022-08-23 | 深圳市今朝时代股份有限公司 | Electric vehicle battery management system and method based on data analysis |
| CN115825763A (en) * | 2023-01-10 | 2023-03-21 | 伟杰科技（苏州）有限公司 | Intelligent battery monitoring system and monitoring method thereof |
| CN117639184A (en) * | 2024-01-25 | 2024-03-01 | 广州鑫虹兴电子有限公司 | Intelligent battery management method and system |
-
2022
- 2022-04-22 CN CN202210426755.2A patent/CN114683956A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932842A (en) * | 2022-07-21 | 2022-08-23 | 深圳市今朝时代股份有限公司 | Electric vehicle battery management system and method based on data analysis |
| CN114932842B (en) * | 2022-07-21 | 2022-11-29 | 深圳市今朝时代股份有限公司 | Electric vehicle battery management system and method based on data analysis |
| CN115825763A (en) * | 2023-01-10 | 2023-03-21 | 伟杰科技（苏州）有限公司 | Intelligent battery monitoring system and monitoring method thereof |
| CN115825763B (en) * | 2023-01-10 | 2023-10-27 | 伟杰科技（苏州）有限公司 | Intelligent battery monitoring system and monitoring method thereof |
| CN117639184A (en) * | 2024-01-25 | 2024-03-01 | 广州鑫虹兴电子有限公司 | Intelligent battery management method and system |
| CN117639184B (en) * | 2024-01-25 | 2024-04-05 | 广州鑫虹兴电子有限公司 | Intelligent battery management method and system |
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