CN105599632B - A kind of battery management method and system based on electric car - Google Patents
A kind of battery management method and system based on electric car Download PDFInfo
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- CN105599632B CN105599632B CN201610119168.3A CN201610119168A CN105599632B CN 105599632 B CN105599632 B CN 105599632B CN 201610119168 A CN201610119168 A CN 201610119168A CN 105599632 B CN105599632 B CN 105599632B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The present invention relates to a kind of battery management method and system based on electric car, including：Initialize system clock, input IO, output IO, SPI communication, Uart communications, A D interface；Analog acquisition front-end A FE is configured by serial peripheral equipment interface SPI；Read powering on estimation voltage, powering on estimation electric current, power on estimated temperature and power on estimation electricity for each battery pack；Judgement powers on estimation voltage, powers on estimation electric current, powers on estimated temperature and power on estimation electricity whether in default threshold range；If in default threshold range, timing acquiring battery bag data, carries out Balance route, battery protection controls and calculates battery dump energy according to battery bag data；If not in default threshold range, corresponding control signal is sent to metal-oxide-semiconductor according to the battery fault condition of battery bag data.
Description
Technical field
The present invention relates to electric automobiles, more particularly to a kind of battery management method and system based on electric car.
Background technology
Electric car is generally using efficient rechargeable battery as power source, therefore, the electricity to charge to rechargeable battery
Pond management system becomes the indispensable part of electric car.
Battery management system is closely linked with battery, and the battery management system of usually electric car cannot be right
Battery bag data overcharged, cross put, overcurrent, temperature, Balance route, operating mode etc. are judged, and nonserviceable
Middle carry out self-test, so that, it is impossible to notify user in time, unnecessary loss is caused for user in battery when something goes wrong.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of battery management method and system based on electric car.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of battery management method based on electric car, institute
The method of stating includes：
Step S1, initialization system clock, input IO, output IO, SPI communication, Uart communications, A D interface；
Step S2, configures analog acquisition front-end A FE by serial peripheral equipment interface SPI；
Step S3, reads powering on estimation voltage, powering on estimation electric current, power on estimated temperature and power on estimation for each battery pack
Electricity；
Step S4, power on described in judgement estimation voltage, it is described power on estimation electric current, it is described power on estimated temperature and it is described on
Whether electricity estimation electricity is in default threshold range；
Step S5, if in the default threshold range, timing acquiring battery bag data, according to the battery pack
Data carry out Balance route, battery protection control and calculate battery dump energy；
Step S6, if not in the default threshold range, according to the battery failures shape of the battery bag data
State sends corresponding control signal to metal-oxide-semiconductor.
The beneficial effects of the invention are as follows：By judge power on estimation voltage, power on estimation electric current, power on estimated temperature and on
Electricity estimation electricity whether in default threshold range, if in, timing acquiring battery bag data, according to battery bag data into
Row Balance route, battery protection control and calculating battery dump energy, if it was not then the battery failures according to battery bag data
State sends corresponding control signal to metal-oxide-semiconductor, so as to detect battery bag data in real time, while also carries out heat pipe to battery pack
Reason, balanced management, insulation management, and estimating remaining capacity of battery, and pass through malfunction self-test management of charging and discharging, failure warning
Information, in real time with Full Vehicle System communication interaction real-time status.
Based on the above technical solutions, the present invention can also be improved as follows.
Further, the battery pack data include electric current and each group cell voltage, and the step S5 includes：
The electric current is filtered to the electric current filtered；
Whether the electric current for judging the filtering is described to power on estimation electricity；
If the electric current of the filtering powers on estimation electricity to be described, using the estimation electricity that powers on as present battery
Remaining capacity；
If the electric current of the filtering does not power on estimation electricity to be described, the electric current of the filtering is subjected to current integration
Obtain the first battery dump energy；
Minimum single group cell voltage is chosen from each group cell voltage；
The minimum single group cell voltage is corresponded into simulation OCV models and obtains the second battery dump energy；
First battery dump energy and second battery dump energy are obtained into described work as by Kalman filtering
Preceding battery dump energy.
Further, the step S5 is further included：
Judge whether the battery bag data is in charged state；
If the battery bag data is in charged state, obtained from each group cell voltage of the battery bag data
Maximum single group cell voltage and minimum single group cell voltage；
Judge whether the maximum single group cell voltage reaches equalizing voltage；
If the maximum single group cell voltage reaches the equalizing voltage, each group cell voltage is traveled through, and will
The each group cell voltage is respectively compared with the minimum single group cell voltage；
The cell voltage with the voltage difference minimum of the minimum single group cell voltage is chosen from each group cell voltage,
And open the equilibrium of the Battery pack voltage.
Further, the step S6 includes：
Judge whether the battery bag data is in the battery fault condition；
If the battery bag data is in the battery fault condition, according to the battery fault condition to described
Metal-oxide-semiconductor sends the corresponding control signal of the battery fault condition.
Further, the battery fault condition includes overcharging state, crosses state of putting, charging over-current state, electric discharge overcurrent shape
State, charging over-temperature condition, electric discharge over-temperature condition, charging low-temperature condition, discharge low-temperature state, battery open circuit state and battery pack
Short-circuit condition.
Another technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of battery management system based on electric car
System, including：
Analog acquisition front-end A FE units, for gathering each group cell voltage；
Temperature collecting cell, for collecting temperature；
Total voltage unit, for gathering total voltage；
Current acquisition unit, for gathering electric current；
Main control unit, for being carried out according to each group cell voltage, the electric current, the total voltage and the temperature
Balance route, battery protection control and calculating battery dump energy, and send corresponding control signal to metal-oxide-semiconductor；
Metal-oxide-semiconductor, for performing corresponding operation according to corresponding control signal.
Further, the main control unit includes：
The electric current is filtered to the electric current filtered；
Whether the electric current for judging the filtering is described to power on estimation electricity；
If the electric current of the filtering powers on estimation electricity to be described, using the estimation electricity that powers on as present battery
Remaining capacity；
If the electric current of the filtering does not power on estimation electricity to be described, the electric current of the filtering is subjected to current integration
Obtain the first battery dump energy；
Minimum single group cell voltage is chosen from each group cell voltage；
The minimum single group cell voltage is corresponded into simulation OCV models and obtains the second battery dump energy；
First battery dump energy and second battery dump energy are obtained into described work as by Kalman filtering
Preceding battery dump energy.
Further, the main control unit further includes：
Judge whether the battery bag data is in charged state；
If the battery bag data is in charged state, obtained from each group cell voltage of the battery bag data
Maximum single group cell voltage and minimum single group cell voltage；
Judge whether the maximum single group cell voltage reaches equalizing voltage；
If the maximum single group cell voltage reaches the equalizing voltage, each group cell voltage is traveled through, and will
The each group cell voltage is respectively compared with the minimum single group cell voltage；
The cell voltage with the voltage difference minimum of the minimum single group cell voltage is chosen from each group cell voltage,
And open the equilibrium of the Battery pack voltage.
Further, the main control unit further includes：
Judge whether the battery bag data is in the battery fault condition；
If the battery bag data is in the battery fault condition, according to the battery fault condition to described
Metal-oxide-semiconductor sends the corresponding control signal of the battery fault condition.
Further, the battery fault condition includes overcharging state, crosses state of putting, charging over-current state, electric discharge overcurrent shape
State, charging over-temperature condition, electric discharge over-temperature condition, charging low-temperature condition, discharge low-temperature state, battery open circuit state and battery pack
Short-circuit condition.
Brief description of the drawings
Fig. 1 is a kind of battery management method flow chart based on electric car provided in an embodiment of the present invention；
Fig. 2 is calculating battery dump energy method flow diagram provided in an embodiment of the present invention；
Fig. 3 is balance control method flow chart provided in an embodiment of the present invention；
Fig. 4 performs corresponding operating method flow chart for metal-oxide-semiconductor provided in an embodiment of the present invention；
Fig. 5 is a kind of battery management system schematic diagram based on electric car provided in an embodiment of the present invention.
In attached drawing, parts list represented by the reference numerals is as follows：
10th, analog acquisition front-end A FE units, 20, temperature collecting cell, 30, total voltage unit, 40, current acquisition unit,
50th, main control unit, 60, metal-oxide-semiconductor, 70,485 interfaces.
Embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Fig. 1 is a kind of battery management method flow chart based on electric car provided in an embodiment of the present invention.
With reference to Fig. 1, step S1, initialization system clock, input IO, output IO, SPI communication, Uart communications, A D interface.
Step S2, by Serial Peripheral Interface (SPI) (Serial Peripheral Interface, SPI) to analog acquisition before
End AFE is configured.
Here, analog acquisition front end, gathers per Battery pack voltage and monitoring over-charging of battery/mistake is put, equalizer switch.
Step S3, reads powering on estimation voltage, powering on estimation electric current, power on estimated temperature and power on estimation for each battery pack
Electricity.
Step S4, power on described in judgement estimation voltage, it is described power on estimation electric current, it is described power on estimated temperature and it is described on
Electricity estimation electricity, if in the default threshold range, performs step S5 whether in default threshold range；If
Not in default threshold range, then step S6 is performed.
Step S5, timing acquiring battery bag data, carries out Balance route, battery protection is controlled according to the battery bag data
With calculating battery dump energy.
Here, it can also judge to overcharge according to battery bag data, put excessively, overcurrent, temperature.
Step S6, corresponding control signal is sent according to the battery fault condition of the battery bag data to metal-oxide-semiconductor.
Step S7, battery management system carry out data interaction by the real-time shape of battery bag data by 485 interfaces with extraneous
State feeds back to vehicle master control system.
As the refinement to implementation shown in Fig. 1, another embodiment of the present invention additionally provides a kind of calculating remaining battery
Electricity method.Wherein, battery pack data include electric current and each group cell voltage, specifically, as shown in Fig. 2, this method includes：
The electric current, is filtered the electric current filtered by step S21.
Step S22, whether the electric current for judging filtering is to power on estimation electricity, if the electric current of filtering is electric to power on estimation
Amount, then perform step S23；If the electric current of the filtering does not power on estimation electricity to be described, step S24 is performed.
Step S23, will power on estimation electricity as present battery remaining capacity.
Step S24, carries out current integration by the electric current of filtering and obtains the first battery dump energy.
Step S25, chooses minimum single group cell voltage from each group cell voltage.
Step S26, corresponds to simulation OCV models by the minimum single group cell voltage and obtains the second battery dump energy.
Here, the curve that OCV models correspond to electricity for voltage is simulated, that is, each voltage corresponds to different electricity respectively
Amount, so as to form curve.
Step S27, first battery dump energy and second battery dump energy are obtained by Kalman filtering
To the present battery remaining capacity.
As the refinement to implementation shown in Fig. 1, another embodiment of the present invention additionally provides a kind of balance control method
Flow chart.Specifically, as shown in figure 3, this method includes：
Step S31, judges whether the battery bag data is in charged state, if the battery bag data is in charging
State, then perform step S32；
Step S32, obtains maximum single group cell voltage and minimum list from each group cell voltage of the battery bag data
Battery pack voltage.
Step S33, judges whether the maximum single group cell voltage reaches equalizing voltage, if the maximum single group battery
Voltage reaches the equalizing voltage, then performs step S34；If maximum single group cell voltage is not reaching to equalizing voltage, close
Close equilibrium.
Step S34, travels through each group cell voltage, and each group cell voltage is electric with the minimum single group respectively
Cell voltage is compared.
Step S35, chooses and the voltage difference minimum of the minimum single group cell voltage from each group cell voltage
Cell voltage, and open the equilibrium of the Battery pack voltage.
As the refinement to implementation shown in Fig. 1, another embodiment of the present invention additionally provides a kind of MOS pipes and performs phase
Flow chart is answered, specifically, as shown in figure 4, this method includes：
Step S41, judges whether the battery bag data is in the battery fault condition；If the battery bag data
In the battery fault condition, then step S42 is performed.
Step S42, the corresponding control of the battery fault condition is sent according to the battery fault condition to the metal-oxide-semiconductor
Signal.
In the present embodiment, the battery fault condition includes overcharging state, crosses state of putting, charging over-current state, discharged
Stream mode, charging over-temperature condition, electric discharge over-temperature condition, charging low-temperature condition, discharge low-temperature state, battery open circuit state and electricity
Pond group short-circuit condition.
Fig. 5 is a kind of battery management system schematic diagram based on electric car provided in an embodiment of the present invention.
With reference to Fig. 5, battery management system has following functions：
Charging and discharging guarantees to recycle reverse current and the essence that motor is brought in brake at any time with mouth input/output
Simple high current interface, individually control makes (electric discharge) guarantee system that can also charge at discharge prevention (charge protection) to charge/discharge
The integrality of system.
Single group/total battery voltage detection, battery pack total voltage, single group voltage detect in real time, accuracy of detection≤0.5%
Battery pack charging and discharging currents detect, in real time the charge/discharge state and electric current of detection battery pack, and current precision≤
1%.
Over-charging of battery is protected, and is monitored in real time in battery charging process per Battery pack voltage, is ensured single group battery charging voltage
No more than the overcharged voltage value of setting.
Battery Cross prevention, monitors in battery discharge procedure per Battery pack voltage, ensures single group cell discharge voltage in real time
No more than the overdischarge pressure value of setting.
Charging overcurrent protection, limits the maximum current to battery pack charging, prevents charging from exceeding battery core absorbability and causing
Security incident occurs for thermal runaway.
Electric discharge overcurrent protection, the maximum current of limitation battery pack electric discharge, prevents from being discharged beyond the load-bearing capacity of battery core, influences
The service life of battery pack.
Short-circuit protection, cut-off current can export, prevent the generation of accident in time in time when external short circuit occurs for battery pack
It is battery balanced, in charging process, single battery charging current mode is adjusted by certain algorithm, ensures system
The battery terminal voltage of interior all batteries is carved with good uniformity when each.
Temperature protection, detects battery pack internal temperature, ensures that battery pack is operated in the safe working temperature model of setting in real time
Enclose, and participate in battery dump energy calculating.
Precharging circuit and control, precharging circuit are the controllable sub-loop for being connected in parallel on discharge control loop, are mainly used for
Connector electric arc when preventing from being connected with bulky capacitor load first.
Battery dump energy is calculated by establishing the V-SOC under different discharge-rate different temperatures, capacity model combines
Electric quantity integration Kalman, which estimates, obtains current state-of-charge, aging situation, cycle-index；Estimated by current charging current and SOC
Calculate the estimated fully charged time.
Burn out detection, detects battery pack and the connection of battery management system, if there is certain Battery pack line to loosen or take off
Fall, forbid battery pack to continue charge/discharge, and provide fault message.
485 interfaces, by 485 interfaces and Full Vehicle System real-time Communication for Power, the real-time state of electrolytic cell in full-vehicle control center
Ensure that vehicle securely and reliably works；BMS inner parameters and renewal firmware are can adjust by 485 interfaces.
Sleep mode, no communication, static condition or guard mode enter sleep mode, communicate, charge/discharge and periodically exit
Dormancy.
Specifically, which includes analog acquisition front-end A FE units 10, temperature collecting cell 20, total voltage unit 30, electricity
Flow collecting unit 40, main control unit 50,60 and 485 interface 70 of metal-oxide-semiconductor.
Analog acquisition front-end A FE units 10, for gathering each group cell voltage；
Temperature collecting cell 20, for collecting temperature；
Total voltage unit 30, for gathering total voltage；
Current acquisition unit 40, for gathering electric current；
Main control unit 50, for according to each group cell voltage, the electric current, the total voltage and the temperature into
Row Balance route, battery protection control and calculating battery dump energy, and send corresponding control signal to metal-oxide-semiconductor；
Metal-oxide-semiconductor 60, for performing corresponding operation according to corresponding control signal.
Here, 485 interfaces 70 can carry out communication interaction with Full Vehicle System in real time.Charger access/electric discharge/communications triggered
Signal is also connected with main control unit 50.
In the present embodiment, the main control unit 50 includes：
The electric current is filtered to the electric current filtered；
Whether the electric current for judging the filtering is described to power on estimation electricity；
If the electric current of the filtering powers on estimation electricity to be described, using the estimation electricity that powers on as present battery
Remaining capacity；
If the electric current of the filtering does not power on estimation electricity to be described, the electric current of the filtering is subjected to current integration
Obtain the first battery dump energy；
Minimum single group cell voltage is chosen from each group cell voltage；
The minimum single group cell voltage is corresponded into simulation OCV models and obtains the second battery dump energy；
First battery dump energy and second battery dump energy are obtained into described work as by Kalman filtering
Preceding battery dump energy.
In the present embodiment, the main control unit 50 further includes：
Judge whether the battery bag data is in charged state；
If the battery bag data is in charged state, obtained from each group cell voltage of the battery bag data
Maximum single group cell voltage and minimum single group cell voltage；
Judge whether the maximum single group cell voltage reaches equalizing voltage；
If the maximum single group cell voltage reaches the equalizing voltage, each group cell voltage is traveled through, and will
The each group cell voltage is respectively compared with the minimum single group cell voltage；
The cell voltage with the voltage difference minimum of the minimum single group cell voltage is chosen from each group cell voltage,
And open the equilibrium of the Battery pack voltage.
In the present embodiment, the main control unit 50 further includes：
Judge whether the battery bag data is in the battery fault condition；
If the battery bag data is in the battery fault condition, according to the battery fault condition to described
Metal-oxide-semiconductor sends the corresponding control signal of the battery fault condition.
In the present embodiment, the battery fault condition includes overcharging state, crosses state of putting, charging over-current state, discharged
Stream mode, charging over-temperature condition, electric discharge over-temperature condition, charging low-temperature condition, discharge low-temperature state, battery open circuit state and electricity
Pond group short-circuit condition.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (8)
- A kind of 1. battery management method based on electric car, it is characterised in that the described method includes：Step S1, initialization system clock, input IO, output IO, SPI communication, Uart communications, A D interface；Step S2, configures analog acquisition front-end A FE by serial peripheral equipment interface SPI；Step S3, reads powering on estimation voltage, powering on estimation electric current, power on estimated temperature and power on estimation electricity for each battery pack Amount；Step S4, estimation voltage is powered on described in judgement, described estimation electric current powered on, described powers on estimated temperature and described power on is estimated Electricity is calculated whether in default threshold range；Step S5, if in the default threshold range, timing acquiring battery bag data, according to the battery bag data Carry out Balance route, battery protection control and calculate battery dump energy；Step S6, if not in the default threshold range, according to the battery fault condition of the battery bag data to Metal-oxide-semiconductor sends corresponding control signal；Wherein, the battery pack data include electric current and each group cell voltage, and the step S5 includes：The electric current is filtered to the electric current filtered；Whether the electric current for judging the filtering is described to power on estimation electricity；If the electric current of the filtering powers on estimation electricity to be described, using the estimation electricity that powers on as present battery residue Electricity；If the electric current of the filtering does not power on estimation electricity to be described, the electric current of the filtering is subjected to current integration and is obtained First battery dump energy；Minimum single group cell voltage is chosen from each group cell voltage；The minimum single group cell voltage is corresponded into simulation OCV models and obtains the second battery dump energy；First battery dump energy and second battery dump energy are obtained into the current electricity by Kalman filtering Pond remaining capacity.
- 2. a kind of battery management method based on electric car according to claim 1, it is characterised in that the step S5 is also Including：Judge whether the battery bag data is in charged state；If the battery bag data is in charged state, obtained from each group cell voltage of the battery bag data maximum Single group cell voltage and minimum single group cell voltage；Judge whether the maximum single group cell voltage reaches equalizing voltage；If the maximum single group cell voltage reaches the equalizing voltage, each group cell voltage is traveled through, and by described in Each group cell voltage is respectively compared with the minimum single group cell voltage；The cell voltage with the voltage difference minimum of the minimum single group cell voltage is chosen from each group cell voltage, and is opened Open the equilibrium of the Battery pack voltage.
- A kind of 3. battery management method based on electric car according to claim 1, it is characterised in that the step S6 bags Include：Judge whether the battery bag data is in the battery fault condition；If the battery bag data is in the battery fault condition, according to the battery fault condition to the metal-oxide-semiconductor Send the corresponding control signal of the battery fault condition.
- A kind of 4. battery management method based on electric car according to claim 3, it is characterised in that the battery failures State includes overcharging state, crosses state of putting, charging over-current state, electric discharge over-current state, charging over-temperature condition, electric discharge excess temperature shape State, charging low-temperature condition, discharge low-temperature state, battery open circuit state and battery pack short-circuit condition.
- A kind of 5. battery management system based on electric car, it is characterised in that including：Analog acquisition front-end A FE units, for gathering each group cell voltage；Temperature collecting cell, for collecting temperature；Total voltage unit, for gathering total voltage；Current acquisition unit, for gathering electric current；Main control unit, it is balanced for being carried out according to each group cell voltage, the electric current, the total voltage and the temperature Control, battery protection control and calculating battery dump energy, and send corresponding control signal to metal-oxide-semiconductor；Metal-oxide-semiconductor, for performing corresponding operation according to corresponding control signal；Wherein, the main control unit includes：The electric current is filtered to the electric current filtered；Whether the electric current for judging the filtering is to power on estimation electricity；If the electric current of the filtering powers on estimation electricity to be described, using the estimation electricity that powers on as present battery residue Electricity；If the electric current of the filtering does not power on estimation electricity to be described, the electric current of the filtering is subjected to current integration and is obtained First battery dump energy；Minimum single group cell voltage is chosen from each group cell voltage；The minimum single group cell voltage is corresponded into simulation OCV models and obtains the second battery dump energy；First battery dump energy and second battery dump energy are obtained into the current electricity by Kalman filtering Pond remaining capacity.
- A kind of 6. battery management system based on electric car according to claim 5, it is characterised in that the main control list Member further includes：Judge whether battery bag data is in charged state；If the battery bag data is in charged state, obtained from each group cell voltage of the battery bag data maximum Single group cell voltage and minimum single group cell voltage；Judge whether the maximum single group cell voltage reaches equalizing voltage；If the maximum single group cell voltage reaches the equalizing voltage, each group cell voltage is traveled through, and by described in Each group cell voltage is respectively compared with the minimum single group cell voltage；The cell voltage with the voltage difference minimum of the minimum single group cell voltage is chosen from each group cell voltage, and is opened Open the equilibrium of the Battery pack voltage.
- A kind of 7. battery management system based on electric car according to claim 5, it is characterised in that the main control list Member further includes：Judge whether battery bag data is in battery fault condition；If the battery bag data is in the battery fault condition, according to the battery fault condition to the metal-oxide-semiconductor Send the corresponding control signal of the battery fault condition.
- A kind of 8. battery management system based on electric car according to claim 7, it is characterised in that the battery failures State includes overcharging state, crosses state of putting, charging over-current state, electric discharge over-current state, charging over-temperature condition, electric discharge excess temperature shape State, charging low-temperature condition, discharge low-temperature state, battery open circuit state and battery pack short-circuit condition.
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| CN106143192B (en) * | 2016-07-08 | 2018-09-21 | 孙健春 | Intelligent electric automobile power-supply management system |
| CN107472040A (en) * | 2016-08-29 | 2017-12-15 | 宝沃汽车（中国）有限公司 | The control system of mobile terminal, vehicle termination and vehicle |
| CN106371031B (en) * | 2016-09-27 | 2021-10-26 | 惠州市蓝微电子有限公司 | Battery pack disconnection detection method and device |
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