CN114347853B - Lithium battery management method for two-wheeled electric vehicle - Google Patents
Lithium battery management method for two-wheeled electric vehicle Download PDFInfo
- Publication number
- CN114347853B CN114347853B CN202210025924.1A CN202210025924A CN114347853B CN 114347853 B CN114347853 B CN 114347853B CN 202210025924 A CN202210025924 A CN 202210025924A CN 114347853 B CN114347853 B CN 114347853B
- Authority
- CN
- China
- Prior art keywords
- electric vehicle
- lithium battery
- control unit
- vehicle control
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J43/00—Arrangements of batteries
- B62J43/10—Arrangements of batteries for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J50/00—Arrangements specially adapted for use on cycles not provided for in main groups B62J1/00 - B62J45/00
- B62J50/20—Information-providing devices
- B62J50/21—Information-providing devices intended to provide information to rider or passenger
- B62J50/22—Information-providing devices intended to provide information to rider or passenger electronic, e.g. displays
-
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention relates to the technical field of lithium batteries, and discloses a lithium battery management method of a two-wheeled electric vehicle, which judges whether a lithium battery of the two-wheeled electric vehicle is changed or not by judging whether an electric vehicle control unit and a BMS management unit can normally establish communication or not when the lithium battery of the two-wheeled electric vehicle is reinstalled in actual use, and reduces the current input to a motor of the two-wheeled electric vehicle if the lithium battery of the two-wheeled electric vehicle is changed, so that potential safety hazards are avoided; in addition, after the electric vehicle control unit and the BMS management unit can establish communication, the BMS management unit judges whether the voltage specification, the maximum working current and the power of the specification of the lithium battery of the BMS management unit accord with the requirements or not according to the battery information sent by the electric vehicle control unit, if not, the BMS management unit limits the output current of the lithium battery, thereby ensuring that the lithium battery installed on the two-wheeled electric vehicle accords with the requirements and is not changed when the two-wheeled electric vehicle runs normally, avoiding the generation of potential safety hazards and ensuring the safety of riders.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a lithium battery management method for a two-wheeled electric vehicle.
Background
In the daily life of people, the two-wheeled electric vehicle greatly facilitates the short-distance travel of people. The two-wheeled electric vehicle uses batteries as a power source, and commonly used batteries comprise a lead-acid storage battery and a lithium battery, wherein the lithium battery is gradually replacing the lead-acid storage battery due to the advantages of high working voltage, small volume, light weight, high energy density, no memory effect, no pollution, small self-discharge, long cycle life and the like, but the lithium battery needs to be provided with a BMS management system for the lithium battery to perform safety protection such as overcharge protection, overdischarge protection, overcurrent protection, balance protection, SOC calculation and the like on the basis of the defects of poor safety, explosion and the like.
After two-wheeled electric motor car production was accomplished, two-wheeled electric motor car all can dispose the lithium cell of fixed voltage specification and with lithium cell voltage specification assorted BMS management system, but the condition that has the privately change lithium cell voltage specification in the life is promptly in order to increase two-wheeled electric motor car's mileage of traveling, change the lithium cell of former factory's electric motor car for the lithium cell of higher voltage specification, and this kind of change brings the potential safety hazard easily, for example too big discharge current has surpassed two-wheeled electric motor car originally and has flowed over current protective measure, perhaps BMS management system can not carry out normal balanced protection to the lithium cell after changing again, make the voltage of every section battery of lithium cell inconsistent, and then reduce the life of lithium cell. And the BMS management system of the lithium battery of the current two-wheeled electric vehicle can only protect the lithium battery, and after the voltage specification of the lithium battery is changed to the two-wheeled electric vehicle, the two-wheeled electric vehicle still can normally travel, and the potential safety hazard is brought for riding passerby's the safety of riding.
Disclosure of Invention
In view of the defects of the background art, the invention provides a lithium battery management method for a two-wheeled electric vehicle, and aims to solve the technical problems that after the voltage specification of a lithium battery is changed, the two-wheeled electric vehicle adopting the lithium battery can still normally run, and potential safety hazards exist.
In order to solve the technical problems, the invention provides the following technical scheme: a lithium battery management method of a two-wheeled electric vehicle comprises a trigger unit, an electric vehicle control unit, a BMS management unit and a motor driving unit, and specifically comprises the following steps:
s1: the trigger unit sends a trigger signal to the electric vehicle control unit when the lithium battery of the two-wheeled electric vehicle is reinstalled;
s2: the electric vehicle control unit sends request information for requesting to acquire battery information to the BMS management unit after receiving the trigger signal;
s3: if the electric vehicle control unit does not receive the received request information transmitted by the BMS management unit after transmitting the request signal to the BMS management unit, the electric vehicle control unit limits the magnitude of the motor current input to the two-wheeled electric vehicle through the motor driving unit;
s4: after receiving the request information sent by the electric vehicle control unit, the BMS management unit sends the information of the lithium battery to the electric vehicle control unit; if the electric vehicle control unit does not receive the information of the lithium battery sent by the BMS control unit within the first time after sending the request signal to the BMS management unit, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit; and if the electric vehicle control unit receives the information of the lithium battery sent by the BMS control unit within the first time after the request signal is sent to the BMS management unit, the two-wheeled electric vehicle is normally ridden.
As a further technical solution, in step S3, if the electric vehicle control unit does not receive the received request information sent by the BMS management unit after sending the request signal to the BMS management unit for the first time, the electric vehicle control unit sends the request information to the BMS management unit again; and when the electric vehicle control unit does not receive the accepted request information sent by the BMS management unit after sending the request information to the BMS management unit for N times, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit, wherein N is a positive integer greater than 1.
As a further technical solution, in step S3, if the BMS management unit of the lithium battery does not receive the request information sent by the electric vehicle control unit within the second time of power supply after the installation of the lithium battery, the BMS management unit limits the output current of the lithium battery and sends the first alarm information to the electric vehicle control unit, and the electric vehicle control unit displays the first alarm information on the display unit after receiving the first alarm information.
As a further technical solution, in step S4, if the BMS management unit does not receive the received information sent by the electric vehicle control unit after sending the information of the lithium battery to the electric vehicle control unit, the BMS management unit sends the information of the lithium battery to the electric vehicle control unit again, and when the BMS management unit does not receive the received information sent by the electric vehicle control unit after sending the information of the lithium battery to the electric vehicle control unit M times, the BMS management unit limits the magnitude of the output current of the lithium battery and sends second alarm information to the electric vehicle control unit, and the electric vehicle control unit displays the second alarm information on the display unit after receiving the second alarm information.
As a further technical solution, the request information for obtaining the battery information includes obtaining voltage specification information, maximum working current information, power information, a voltage determination value, a current determination value, and a power determination value of the lithium battery, in step S4, after receiving the request information, the BMS management unit compares the voltage specification value of the lithium battery with the voltage determination value, compares the maximum current working value of the lithium battery with the current determination value, and compares the power value of the lithium battery with the power determination value, if the comparison results are different, the BMS management unit limits the output current of the lithium battery and sends third alarm information to the electric vehicle control unit, and the electric vehicle control unit receives the third alarm information and then displays the third alarm information on the display unit.
As a further technical solution, in step S4, after receiving the battery information sent by the BMS management unit, the electric vehicle control unit determines to compare the voltage specification value of the lithium battery itself with the voltage determination value, compare the maximum current operating value of the lithium battery itself with the current determination value, and compare the power value of the lithium battery itself with the power determination value, and if the comparison results are different, the electric vehicle control unit limits the magnitude of the motor current input to the two-wheeled electric vehicle through the motor driving unit.
As a further technical scheme, when the electric vehicle runs normally, the BMS management unit monitors whether the lithium battery has a fault alarm, if the fault alarm exists, the BMS management unit sends corresponding fault alarm information to the electric vehicle control unit and adjusts the power output of the lithium battery, and the electric vehicle control unit displays the fault alarm information on the display unit.
As a further technical scheme, when the electric vehicle is running normally, the BMS management unit sends battery state information and power output state information to the electric vehicle control unit, the electric vehicle control unit displays the battery state information and the power output state information on the display unit, the electric vehicle control unit judges whether the electric quantity of the lithium battery is lower than an electric quantity judgment value and whether the temperature of the lithium battery is greater than a temperature judgment threshold value according to the battery state information, if the electric quantity of the lithium battery is lower than the electric quantity judgment value and/or the temperature of the lithium battery is greater than the temperature judgment value, the electric vehicle control unit sends an output power reduction request to the BMS management unit, and the BMS management unit reduces the output power of the lithium battery after receiving the output power reduction request.
As a further technical solution, when the capacity of the lithium battery is lower than 20%, the electric vehicle control unit sends a request for reducing the output power to 50% of the original output power to the BMS management unit.
As a further technical scheme, when the temperature of the lithium battery is more than 45 ℃, the electric vehicle control unit sends a request for reducing the output power to 80% of the original output power to the BMS management unit; when the temperature of the lithium battery is more than 55 ℃, the electric vehicle control unit sends a request for reducing the output power to 50% of the original output power to the BMS management unit; when the temperature of the lithium battery is greater than 60 ℃, the electric vehicle control unit sends a request for stopping power output to the BMS management unit.
Compared with the prior art, the invention has the beneficial effects that: according to the method, when the lithium battery of the two-wheeled electric vehicle is reinstalled, whether the lithium battery of the two-wheeled electric vehicle is changed or not is judged by judging whether the electric vehicle control unit and the BMS management unit can normally establish communication or not, and if the lithium battery of the two-wheeled electric vehicle is changed, the current input to the motor of the two-wheeled electric vehicle is reduced, so that potential safety hazards are avoided; in addition, after the electric vehicle control unit and the BMS management unit can establish communication, the BMS management unit judges whether the voltage specification, the maximum working current and the power of the specification of the lithium battery meet the requirements or not according to the battery information sent by the electric vehicle control unit, and if the voltage specification, the maximum working current and the power of the specification of the lithium battery meet the requirements, the BMS management unit limits the output current of the lithium battery, so that the lithium battery installed on the two-wheeled electric vehicle meets the requirements and is not changed when the two-wheeled electric vehicle runs normally, potential safety hazards are avoided, and the safety of riders is guaranteed; and finally, the BMS management unit monitors the electric quantity of the lithium battery, adjusts the power output of the lithium battery, prevents the lithium battery from being over-discharged, and can prevent the lithium battery from working in a high-temperature environment by monitoring the temperature of the lithium battery.
Drawings
Fig. 1 is a flow chart of the present invention in an embodiment.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, a lithium battery management method for a two-wheeled electric vehicle includes a trigger unit, an electric vehicle control unit, a BMS management unit, and a motor driving unit, and specifically includes the following steps:
s1: the trigger unit sends a trigger signal to the electric vehicle control unit when the lithium battery of the two-wheeled electric vehicle is reinstalled;
s2: the electric vehicle control unit sends request information for requesting to acquire battery information to the BMS management unit after receiving the trigger signal;
s3: if the electric vehicle control unit does not receive the received request information sent by the BMS management unit after sending the request signal to the BMS management unit, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit;
s4: after receiving the request information sent by the electric vehicle control unit, the BMS management unit sends the information of the lithium battery to the electric vehicle control unit; if the electric vehicle control unit does not receive the information of the lithium battery sent by the BMS control unit within the first time after sending the request signal to the BMS management unit, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit; and if the electric vehicle control unit receives the information of the lithium battery sent by the BMS control unit within the first time after sending the request signal to the BMS management unit, the two-wheeled electric vehicle is normally ridden.
In step S1, the re-installation of the lithium battery of the electric vehicle means that the power output connector of the lithium battery is unplugged from the power input socket of the electric vehicle and then plugged again.
In actual use, if the lithium battery on the electric vehicle needs to be replaced, the original lithium battery on the electric vehicle needs to be taken down, and then a new lithium battery is installed on the electric vehicle.
In actual use, when the electric vehicle control unit sends the request information to the BMS management unit, the BMS management unit may not receive the request information due to some interference, and in order to avoid that such a situation affects the riding of the electric vehicle, specifically, in this embodiment, in step S3, if the electric vehicle control unit does not receive the received request information sent by the BMS management unit after sending the request signal to the BMS management unit for the first time, the electric vehicle control unit sends the request information to the BMS management unit again; and when the electric vehicle control unit does not receive the accepted request information sent by the BMS management unit after sending the request information to the BMS management unit for N times, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit, wherein N is a positive integer greater than 1. In one embodiment, N is 2.
In this embodiment, in step S3, if the BMS management unit of the lithium battery does not receive the request message sent by the electric vehicle control unit within the second time of power supply after the lithium battery is installed, the BMS management unit limits the output current of the lithium battery and sends the first alarm message to the electric vehicle control unit, and the electric vehicle control unit displays the first alarm message on the display unit after receiving the first alarm message. When in actual use, through setting up like this, after the lithium cell of assembling on the electric motor car was torn down and is assembled to other electric motor cars, the BMS administrative unit of lithium cell can make the electric motor car can not normally ride through the output current who limits the lithium cell, and then avoids the condition that the lithium cell of electric motor car appears changing mutually, ensures user's the safety of riding.
Similarly, in order to avoid interference to the reception of the information affecting the reception of the lithium battery sent by the BMS management unit by the electric vehicle control unit, in this embodiment, in step S4, if the BMS management unit does not receive the received information sent by the electric vehicle control unit after sending the information of the lithium battery to the electric vehicle control unit, the BMS management unit sends the information of the lithium battery to the electric vehicle control unit again, and does not receive the received information sent by the electric vehicle control unit after the BMS management unit sends the information of the lithium battery to the electric vehicle control unit for M times, the BMS management unit limits the magnitude of the output current of the lithium battery and sends second alarm information to the electric vehicle control unit, and the electric vehicle control unit displays the second alarm information on the display unit after receiving the second alarm information.
The above contents in this embodiment are all to judge whether the lithium battery of the electric vehicle has been replaced by judging whether the electric vehicle control unit and the BMS management unit can communicate normally, i.e., establishing a handshake. In a certain situation, the electric vehicle control unit and the BMS managing unit are both able to establish communication normally, and it is necessary to further determine whether the lithium battery of the electric vehicle has been replaced.
Specifically, in this embodiment, the request information for acquiring the battery information in step S1 includes acquiring voltage specification information, maximum operating current information, power information, a voltage determination value, a current determination value, and a power determination value of the lithium battery, in step S4, after receiving the request information, the BMS management unit compares the voltage specification value of the lithium battery itself with the voltage determination value, compares the maximum current operating value of the lithium battery itself with the current determination value, and compares the power value of the lithium battery itself with the power determination value, if the comparison results are different, the BMS management unit limits the output current of the lithium battery and sends third alarm information to the electric vehicle control unit, and the electric vehicle control unit receives the third alarm information and then displays the third alarm information on the display unit.
The fact that the comparison results are different means that at least one of the voltage specification value and the voltage judgment value of the lithium battery, the maximum current working value and the current judgment value of the lithium battery and the power value and the power judgment value of the lithium battery is different, the third alarm information should reflect all different parameters, and for example, when the voltage specification value and the maximum working current are different, the BMS management unit sends alarm information that the voltage specification and the maximum working current of the lithium battery are abnormal to the electric vehicle control unit.
Because the BMS management unit can limit the rotating speed of the electric vehicle by adjusting the output current of the BMS management unit, and the electric vehicle control unit can adjust the rotating speed of the electric vehicle through the motor driving unit, in step S4, the electric vehicle control unit judges that the voltage specification value of the lithium battery per se is compared with the voltage judgment value, the maximum current working value of the lithium battery per se is compared with the current judgment value, and the power value of the lithium battery per se is compared with the power judgment value after receiving the battery information sent by the BMS management unit, and if the comparison results are different, the electric vehicle control unit limits the motor current input into the two-wheeled electric vehicle through the motor driving unit. When the system is in actual use, the electric vehicle can not normally ride when the information of the lithium battery is not correct by secondarily judging the information of the battery sent by the BMS management system through the electric vehicle control unit.
The above in this embodiment is to determine whether the lithium battery of the electric vehicle has been replaced by determining whether the electric vehicle control unit and the BMS management unit can normally establish communication and by determining whether the voltage specification, the maximum operating current value, and the power of the lithium battery are the same as the determination values.
In actual use, for the safety of the lithium battery, in this embodiment, when the electric vehicle is running normally, the BMS management unit monitors whether the lithium battery has a fault alarm, and if the fault alarm exists, the BMS management unit sends corresponding fault alarm information to the electric vehicle control unit and adjusts the power output of the lithium battery, and the electric vehicle control unit displays the fault alarm information on the display unit.
Further, when the electric vehicle runs normally, the BMS management unit sends battery state information and power output state information to the electric vehicle control unit, the electric vehicle control unit displays the battery state information and the power output state information on the display unit, the electric vehicle control unit judges whether the electric quantity of the lithium battery is lower than an electric quantity judgment value or not and whether the temperature of the lithium battery is greater than a temperature judgment threshold or not according to the battery state information, if the electric quantity of the lithium battery is lower than the electric quantity judgment value and/or the temperature of the lithium battery is greater than the temperature judgment value, the electric vehicle control unit sends an output power reduction request to the BMS management unit, and the BMS management unit reduces the output power of the lithium battery after receiving the output power reduction request.
Specifically, when the capacity of the lithium battery is less than 20%, the electric vehicle control unit transmits a request for reducing the output power to 50% of the original output power to the BMS management unit. In one embodiment, the electric power determination value may be adjusted to be, for example, 15% or 25% when the safety of the lithium battery is ensured. In one embodiment, the output of the lithium battery may be reduced to 45% or 55% of the original output.
Specifically, when the temperature of the lithium battery is greater than 45 ℃, the electric vehicle control unit sends a request for reducing the output power to 80% of the original output power to the BMS management unit; when the temperature of the lithium battery is more than 55 ℃, the electric vehicle control unit sends a request for reducing the output power to 50% of the original output power to the BMS management unit; when the temperature of the lithium battery is greater than 60 ℃, the electric vehicle control unit sends a request for stopping power output to the BMS management unit. In a certain embodiment, the temperature determination value can be adjusted according to actual needs, and the ratio of the reduced output power of the lithium battery to the original output power can be adjusted according to actual needs. In conclusion, the method judges whether the lithium battery of the two-wheeled electric vehicle is changed or not by judging whether the electric vehicle control unit and the BMS management unit can normally establish communication or not when the lithium battery of the two-wheeled electric vehicle is reinstalled, and reduces the current input to the motor of the two-wheeled electric vehicle if the lithium battery of the two-wheeled electric vehicle is changed, so that potential safety hazards are avoided; in addition, after the electric vehicle control unit and the BMS management unit can establish communication, the BMS management unit judges whether the voltage specification, the maximum working current and the power of the specification of the lithium battery meet the requirements or not according to the battery information sent by the electric vehicle control unit, and if the voltage specification, the maximum working current and the power of the specification of the lithium battery meet the requirements, the BMS management unit limits the output current of the lithium battery, so that the lithium battery installed on the two-wheeled electric vehicle meets the requirements and is not changed when the two-wheeled electric vehicle runs normally, potential safety hazards are avoided, and the safety of riders is guaranteed; and finally, the BMS management unit monitors the electric quantity of the lithium battery, adjusts the power output of the lithium battery, prevents the lithium battery from being over-discharged, and can prevent the lithium battery from working in a high-temperature environment by monitoring the temperature of the lithium battery.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A lithium battery management method of a two-wheeled electric vehicle is characterized by comprising a trigger unit, an electric vehicle control unit, a BMS management unit and a motor driving unit, and specifically comprising the following steps:
s1: the trigger unit sends a trigger signal to the electric vehicle control unit when the lithium battery of the two-wheeled electric vehicle is reinstalled;
s2: the electric vehicle control unit sends request information for requesting to acquire battery information to the BMS management unit after receiving the trigger signal;
s3: if the electric vehicle control unit does not receive the received request information sent by the BMS management unit after sending the request information to the BMS management unit, the electric vehicle control unit limits the magnitude of the motor current input to the two-wheeled electric vehicle through the motor driving unit;
s4: after receiving the request information sent by the electric vehicle control unit, the BMS management unit sends the information of the lithium battery to the electric vehicle control unit; if the electric vehicle control unit does not receive the information of the lithium battery sent by the BMS control unit within the first time after sending the request signal to the BMS management unit, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit; and if the electric vehicle control unit receives the information of the lithium battery sent by the BMS control unit within the first time after the request signal is sent to the BMS management unit, the two-wheeled electric vehicle is normally ridden.
2. The method of claim 1, wherein in step S3, if the electric vehicle control unit does not receive the received request information sent by the BMS management unit after the request signal is sent to the BMS management unit for the first time, the electric vehicle control unit sends the request information to the BMS management unit again; and when the electric vehicle control unit does not receive the received request information sent by the BMS management unit after sending the request information to the BMS management unit for N times, the electric vehicle control unit limits the motor current input to the two-wheeled electric vehicle through the motor driving unit, wherein N is a positive integer greater than 1.
3. The lithium battery management method of a two-wheeled electric vehicle as recited in claim 1, wherein in step S3, if the BMS management unit of the lithium battery does not receive the request message sent by the electric vehicle control unit within the second time of power supply after installation of the lithium battery, the BMS management unit limits the output current of the lithium battery and sends a first alarm message to the electric vehicle control unit, and the electric vehicle control unit displays the first alarm message on the display unit after receiving the first alarm message.
4. The method of claim 1, wherein in step S4, if the BMS unit does not receive the information received from the electric vehicle control unit after sending the information about the lithium battery to the electric vehicle control unit, the BMS unit sends the information about the lithium battery to the electric vehicle control unit again, and when the BMS unit does not receive the information received from the electric vehicle control unit after sending the information about the lithium battery to the electric vehicle control unit M times, the BMS unit limits the output current of the lithium battery and sends a second alarm message to the electric vehicle control unit, and the electric vehicle control unit displays the second alarm message on the display unit after receiving the second alarm message.
5. The lithium battery management method of a two-wheeled electric vehicle as claimed in claim 1, wherein the request information for obtaining battery information includes obtaining voltage specification information, maximum operating current information, power information, a voltage determination value, a current determination value and a power determination value of a lithium battery, in step S4, when the BMS management unit receives the request information, the BMS management unit compares the voltage specification value of the lithium battery with the voltage determination value, compares the maximum current operating value of the lithium battery with the current determination value and compares the power value of the lithium battery with the power determination value, if the comparison results are different, the BMS management unit limits the output current of the lithium battery and sends third alarm information to the electric vehicle control unit, and the electric vehicle control unit receives the third alarm information and then displays the third alarm information on the display unit.
6. The method as claimed in claim 5, wherein the electric vehicle control unit determines to compare the voltage specification value of the lithium battery with a voltage determination value, the maximum current operation value of the lithium battery with a current determination value, and the power value of the lithium battery with a power determination value after receiving the battery information transmitted from the BMS management unit in step S4, and the electric vehicle control unit limits the magnitude of the motor current input to the two-wheeled electric vehicle through the motor driving unit if the comparison results are different.
7. The lithium battery management method of a two-wheeled electric vehicle as claimed in claim 1, wherein when the electric vehicle is running normally, the BMS managing unit monitors whether the lithium battery has a fault alarm, and if the fault alarm exists, the BMS managing unit sends corresponding fault alarm information to the electric vehicle controlling unit and adjusts the power output of the lithium battery, and the electric vehicle controlling unit displays the fault alarm information on the display unit.
8. The method of claim 1, wherein when the electric vehicle is in a normal driving state, the BMS management unit transmits the battery state information and the power output state information to the electric vehicle control unit, the electric vehicle control unit displays the battery state information and the power output state information on the display unit, the electric vehicle control unit determines whether the capacity of the lithium battery is lower than a capacity determination value and whether the temperature of the lithium battery is greater than a temperature determination threshold value according to the battery state information, the electric vehicle control unit transmits a request for reducing the output power to the BMS management unit if the capacity of the lithium battery is lower than the capacity determination value and/or the temperature of the lithium battery is greater than the temperature determination value, and the BMS management unit reduces the output power of the lithium battery after receiving the request for reducing the output power.
9. The method of claim 8, wherein the electric vehicle control unit sends a request for reducing the output power to 50% of the original output power to the BMS management unit when the capacity of the lithium battery is less than 20%.
10. The method of claim 8, wherein the electric vehicle control unit sends a request to the BMS management unit to reduce the output power to 80% of the original output power when the temperature of the lithium battery is greater than 45 ℃; when the temperature of the lithium battery is more than 55 ℃, the electric vehicle control unit sends a request for reducing the output power to 50% of the original output power to the BMS management unit; when the temperature of the lithium battery is greater than 60 ℃, the electric vehicle control unit sends a request for stopping power output to the BMS management unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025924.1A CN114347853B (en) | 2022-01-11 | 2022-01-11 | Lithium battery management method for two-wheeled electric vehicle |
| PCT/CN2022/103855 WO2023134135A1 (en) | 2022-01-11 | 2022-07-05 | Lithium battery management method for two-wheeled electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025924.1A CN114347853B (en) | 2022-01-11 | 2022-01-11 | Lithium battery management method for two-wheeled electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114347853A CN114347853A (en) | 2022-04-15 |
| CN114347853B true CN114347853B (en) | 2023-02-03 |
Family
ID=81108479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210025924.1A Active CN114347853B (en) | 2022-01-11 | 2022-01-11 | Lithium battery management method for two-wheeled electric vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114347853B (en) |
| WO (1) | WO2023134135A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347853B (en) * | 2022-01-11 | 2023-02-03 | 江苏新日电动车股份有限公司 | Lithium battery management method for two-wheeled electric vehicle |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692583A (en) * | 2009-09-21 | 2010-04-07 | 惠州市亿能电子有限公司 | Battery management system for pure electric bus |
| CN103568862A (en) * | 2012-08-07 | 2014-02-12 | 丰田自动车株式会社 | Battery management system and battery replacement method |
| KR20150026764A (en) * | 2013-08-28 | 2015-03-11 | 주식회사 엘지화학 | Current measurement relay apparatus |
| CN106891762A (en) * | 2017-02-21 | 2017-06-27 | 河南豫清新能源产业有限公司 | A kind of accumulator of electric car replaces dead battery method in safeguarding |
| WO2017202964A1 (en) * | 2016-05-27 | 2017-11-30 | E.On Czech Holding Ag | Battery module for a two-wheeled electric vehicle |
| CN107579308A (en) * | 2017-08-31 | 2018-01-12 | 江苏大学 | A kind of batteries of electric automobile bag heat management and temperature equalization control method |
| CN108649635A (en) * | 2018-05-19 | 2018-10-12 | 智车优行科技（北京）有限公司 | The acquisition methods and system of battery information |
| CN108780928A (en) * | 2016-08-26 | 2018-11-09 | 株式会社Lg化学 | Battery management system |
| CN109378884A (en) * | 2018-11-30 | 2019-02-22 | 中联重科股份有限公司 | Failure sorted and intersection control routine and method based on battery management system |
| CN110001841A (en) * | 2019-04-24 | 2019-07-12 | 江苏新日电动车股份有限公司 | A kind of electric bicycle intelligence system |
| CN110949178A (en) * | 2019-12-13 | 2020-04-03 | 重庆美顺电子科技有限公司 | Intelligent lithium battery parallel management control system and method |
| WO2020111915A2 (en) * | 2018-11-30 | 2020-06-04 | 재상전자주식회사 | System and method for exchanging battery of electric two-wheeled vehicle |
| CN112319305A (en) * | 2020-10-10 | 2021-02-05 | 蔚来汽车科技(安徽)有限公司 | Safety monitoring method, monitoring system and device for vehicle |
| CN113071370A (en) * | 2021-03-24 | 2021-07-06 | 浙江合众新能源汽车有限公司 | Management method of low-voltage lithium battery of electric automobile and complete automobile power supply switching method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111114377A (en) * | 2013-11-28 | 2020-05-08 | 松下电器（美国）知识产权公司 | Information output method, information presentation device, and information output system |
| KR20150098554A (en) * | 2014-02-20 | 2015-08-28 | 주식회사 엘지화학 | Apparatus, system and method for preventing damage of battery rack using voltage measurement |
| KR20170032994A (en) * | 2015-09-16 | 2017-03-24 | 최범진 | A Battery Managing Apparatus for Exchanging a Battery with Safe and a Method for Exchanging a Battery |
| US9931956B2 (en) * | 2015-12-30 | 2018-04-03 | Thunder Power New Energy Vehicle Development Company Limited | Battery management system |
| US10322688B2 (en) * | 2016-12-30 | 2019-06-18 | Textron Innovations Inc. | Controlling electrical access to a lithium battery on a utility vehicle |
| CN108416925B (en) * | 2018-03-07 | 2020-11-13 | 北京新能源汽车股份有限公司 | Control method of battery pack, battery pack controller, server and automobile |
| CN112622692B (en) * | 2020-12-17 | 2022-06-14 | 浙江钱江摩托股份有限公司 | Battery pack authentication method for electric vehicle |
| CN112659972B (en) * | 2021-01-05 | 2022-07-05 | 东风商用车有限公司 | Signal processing system and method for adapting power battery and whole vehicle |
| CN114347853B (en) * | 2022-01-11 | 2023-02-03 | 江苏新日电动车股份有限公司 | Lithium battery management method for two-wheeled electric vehicle |
-
2022
- 2022-01-11 CN CN202210025924.1A patent/CN114347853B/en active Active
- 2022-07-05 WO PCT/CN2022/103855 patent/WO2023134135A1/en unknown
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692583A (en) * | 2009-09-21 | 2010-04-07 | 惠州市亿能电子有限公司 | Battery management system for pure electric bus |
| CN103568862A (en) * | 2012-08-07 | 2014-02-12 | 丰田自动车株式会社 | Battery management system and battery replacement method |
| KR20150026764A (en) * | 2013-08-28 | 2015-03-11 | 주식회사 엘지화학 | Current measurement relay apparatus |
| WO2017202964A1 (en) * | 2016-05-27 | 2017-11-30 | E.On Czech Holding Ag | Battery module for a two-wheeled electric vehicle |
| CN108780928A (en) * | 2016-08-26 | 2018-11-09 | 株式会社Lg化学 | Battery management system |
| CN106891762A (en) * | 2017-02-21 | 2017-06-27 | 河南豫清新能源产业有限公司 | A kind of accumulator of electric car replaces dead battery method in safeguarding |
| CN107579308A (en) * | 2017-08-31 | 2018-01-12 | 江苏大学 | A kind of batteries of electric automobile bag heat management and temperature equalization control method |
| CN108649635A (en) * | 2018-05-19 | 2018-10-12 | 智车优行科技（北京）有限公司 | The acquisition methods and system of battery information |
| CN109378884A (en) * | 2018-11-30 | 2019-02-22 | 中联重科股份有限公司 | Failure sorted and intersection control routine and method based on battery management system |
| WO2020111915A2 (en) * | 2018-11-30 | 2020-06-04 | 재상전자주식회사 | System and method for exchanging battery of electric two-wheeled vehicle |
| CN110001841A (en) * | 2019-04-24 | 2019-07-12 | 江苏新日电动车股份有限公司 | A kind of electric bicycle intelligence system |
| CN110949178A (en) * | 2019-12-13 | 2020-04-03 | 重庆美顺电子科技有限公司 | Intelligent lithium battery parallel management control system and method |
| CN112319305A (en) * | 2020-10-10 | 2021-02-05 | 蔚来汽车科技(安徽)有限公司 | Safety monitoring method, monitoring system and device for vehicle |
| CN113071370A (en) * | 2021-03-24 | 2021-07-06 | 浙江合众新能源汽车有限公司 | Management method of low-voltage lithium battery of electric automobile and complete automobile power supply switching method |
Non-Patent Citations (3)
| Title |
|---|
| 两轮自平衡电动车及其电机控制器设计;王陆军等;《电气传动》;20111120(第11期);全文 * |
| 基于FHA的电池管理系统功能优化;沈继伟等;《科技传播》;20131023(第20期);全文 * |
| 混合动力车镍氢电池管理系统关键问题分析;孙丙香等;《电力电子技术》;20081020(第10期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114347853A (en) | 2022-04-15 |
| WO2023134135A1 (en) | 2023-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107499180B (en) | Pure electric vehicle power control method and system | |
| CN101279597B (en) | Single power supply control system for automobile | |
| CN101973211A (en) | Automobile power supply management system | |
| CN111231767A (en) | Battery charging protection system and method applied to new energy electric automobile | |
| CN108808751B (en) | Power supply system and method for battery replacement station | |
| CN114347853B (en) | Lithium battery management method for two-wheeled electric vehicle | |
| CN106627188A (en) | Extended-range system of electric car | |
| KR20220062225A (en) | System and method for managing battery of vehicle | |
| US20230006453A1 (en) | Power storage device, vehicle, power storage device control method, and program | |
| CN105564262A (en) | Electric automobile battery charging balance recovery charger and method | |
| CN102570526A (en) | Battery balancing control method and device as well as electric automobile | |
| CN103101447B (en) | The charging display device of battery-operated motor cycle and method | |
| CN104184191B (en) | A kind of electric automobile whole controls device and control method thereof | |
| JP3351683B2 (en) | In-vehicle battery control device | |
| CN115384427A (en) | Communication system for mobile storage and charging vehicle and control method | |
| CN113746180A (en) | Split battery power supply method and system | |
| CN209104301U (en) | A kind of electric automobile power battery management system | |
| CN112583066A (en) | Forklift lithium iron phosphate battery charging method | |
| CN111982531A (en) | Method for evaluating matching performance of battery and whole vehicle | |
| CN104716717A (en) | Suspension storage battery management system and method | |
| CN212676916U (en) | Battery charging management system | |
| CN112793464B (en) | Charging control device, system and method for battery box of electric vehicle and electric vehicle | |
| CN220457139U (en) | Battery box charging system and off-vehicle charging device | |
| CN214278672U (en) | Electric motor car safety power consumption monitoring device | |
| CN214450307U (en) | New energy automobile battery protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |