CN103326425A - Automobile power battery management system and battery management method - Google Patents

Automobile power battery management system and battery management method Download PDF

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Publication number
CN103326425A
CN103326425A CN2013102239258A CN201310223925A CN103326425A CN 103326425 A CN103326425 A CN 103326425A CN 2013102239258 A CN2013102239258 A CN 2013102239258A CN 201310223925 A CN201310223925 A CN 201310223925A CN 103326425 A CN103326425 A CN 103326425A
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power supply
cpu
host cpu
management system
auxiliary
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CN2013102239258A
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方文平
金启前
由毅
吴成明
冯擎峰
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Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
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Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
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Priority to CN2013102239258A priority Critical patent/CN103326425A/en
Publication of CN103326425A publication Critical patent/CN103326425A/en
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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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The invention provides an automobile power battery management system and a battery management method. The automobile power battery management system comprises a main central processing unit and an auxiliary central processing unit, wherein the main central processing unit is used for collecting parameters of a power battery, processing the parameters and outputting a control signal to an execution unit according to the processing result. The main central processing unit is further used for outputting a work signal to the auxiliary central processing unit. When the auxiliary central processing unit can receive the work signal from the main central processing unit, the auxiliary central processing unit is in a dormant state, and when the auxiliary central processing unit cannot receive the work signal from the main central processing unit, the auxiliary central processing unit is automatically awaken from the dormant state, enters the working state and takes over the work of the main central processing unit.

Description

Automobile power cell management system and battery management method
Technical field
The present invention relates to a kind of automobile power cell management system, relate in particular to a kind of automobile power cell management system and battery management method that possesses from redundancy feature.
Background technology
The pollution emission of motor vehicle has become the subject matter of city environmental pollution and climatic deterioration, and new-energy automobile such as pure electric automobile, hybrid vehicle, more and more is subject to the extensive attention of automobile industry and widelys popularize.
Electrokinetic cell is the important component part of vehicle, for the operation of motor vehicle provides electric energy.Electrokinetic cell is the important energy-storage travelling wave tube of vehicle, and the operating voltage of electrokinetic cell generally more than 300V, by adopting higher voltage standard, can effectively reduce the operating current of electric equipment, reduces the weight of electric equipment and car load.But, the operating voltage of electrokinetic cell also causes potential harm to the occupant simultaneously, and the variation of indivedual cell performances can affect the performance of whole battery pack, therefore must set up management maintenance system---the battery management system of the operating state of electrokinetic cell, with the normal operation of assurance vehicle and occupant's personal safety.
The main task of battery management system is to detect the operating state of battery, prevents super-charge super-discharge etc. to the damage behavior of battery, and its dump energy is made estimate comparatively accurately, will pass to timely and effectively for information about the car load energy management system.The state information of battery plays vital effect to the distribution of car load energy management system reasonable coordination energy so that vehicle reaches good running status.
Because there is distinguishing feature at the scene that battery management system is used: the one, there is a large amount of interference miscellaneous; The 2nd, applied environment is abominable, so the reliability of battery management system just becomes the key issue that its success is used.Under lab the battery management system finished of design meets designing requirement after debugging, but after battery management system inserted the scene, battery management system often can not be normally stable work.The reason that produces this situation mainly is that the reliability of battery management system is good not, can not get rid of on-the-spot complex environment and the impact of various interference.
When the central processing unit of battery management system went wrong, battery management system was out of service, and battery information may occur and can't correctly report this moment, the danger situation that the battery high pressure can't normal cutoff.So, battery management system is carried out reliability design is absolutely necessary.
Summary of the invention
The invention provides a kind of automobile power cell management system, in the situation that can go wrong at low-voltage power supply or the central processing unit of battery management system, battery management system still can move at short notice preferably, has good redundancy feature.
The present invention also provides the automobile power cell management method of using above-mentioned automobile batteries management system.
For reaching above-mentioned advantage, the invention provides a kind of automobile power cell management system, comprise host CPU and secondary CPU, described host CPU is used for gathering the parameter of electrokinetic cell and parameter is processed, and outputs control signals to performance element according to result; Described host CPU also is used for to described secondary CPU output services signal; When described secondary CPU can receive from the described working signal of described host CPU, described secondary CPU was in resting state; When described secondary CPU can't receive from the described working signal of described host CPU, described secondary CPU automatically woke up from resting state and enters operating state, and took over the work of described host CPU.
In one embodiment of the invention, described automobile power cell management system also comprises auxiliary rechargable power supplies, and described host CPU, described secondary CPU and described auxiliary rechargable power supplies are powered by power supply; When described power supply power supply was lost efficacy, described auxiliary rechargable power supplies was given described secondary CPU power supply.
In one embodiment of the invention, be connected with the auxiliary power supply control unit between described performance element and the described auxiliary rechargable power supplies; When described power supply power supply was lost efficacy, described auxiliary rechargable power supplies was given described performance element power supply by described auxiliary power supply control unit.
In one embodiment of the invention, described working signal is pulse width modulating signal.
The present invention also provides a kind of automobile power cell management method, and its step comprises:
(1) utilize the host CPU of battery management system to gather battery parameter and described battery parameter is carried out analyzing and processing, and according to result transfer control signal to performance element;
(2) utilize host CPU to transmit working signal to the secondary CPU of battery management system, secondary CPU receives the working signal from host CPU;
(3) utilize secondary CPU to judge according to the working signal of host CPU whether host CPU is in normal operating conditions; If so, then secondary CPU is in resting state; Otherwise secondary CPU automatically wakes up and enters operating state, and takes over the work of host CPU.
In one embodiment of the invention, in described step (3), when described secondary CPU can receive working signal from described host CPU, judge that then described host CPU is in normal operating conditions; When described secondary CPU can't receive working signal from described host CPU, judge that then described host CPU is in abnormal operating state.
In one embodiment of the invention, also comprise and utilize power supply to power to described battery management system, when described host CPU can not be worked because of described power supply power supply inefficacy, software own or hardware actual effect, described host CPU stopped the transportation work signal to described secondary CPU.
In one embodiment of the invention, when described power supply power supply was lost efficacy, also comprise and utilize auxiliary rechargable power supplies to described secondary CPU power supply.
In one embodiment of the invention, when described power supply power supply was lost efficacy, also comprise and utilize the auxiliary power supply control unit to control described auxiliary rechargable power supplies to described performance element power supply.
In one embodiment of the invention, described working signal is pulse width modulating signal.
Adopt automobile batteries management system of the present invention or battery management method, when the host CPU cisco unity malfunction, secondary CPU wakes up automatically, take over the work of described host CPU, thereby can be in the software of power supply power supply or host CPU or situation that hardware goes wrong, automobile still can move preferably at short notice, has good redundancy feature.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the structural representation of the automobile batteries management system of better embodiment of the present invention.
Fig. 2 is the flow chart of the automobile power cell management method of better embodiment of the present invention.
Embodiment
Battery management system (BMS of the present invention, battery management system) 100 is applied on the power vehicle, please refer to Fig. 1, power vehicle also comprises entire car controller (VMS, vehicle management system, i.e. power assembly controller) 200, electrokinetic cell 300, power supply 400, performance element 500 and auxiliary power supply control unit 600.
Entire car controller 200 is core control parts of whole automobile, it gathers the information of each parts of automobile, to information manage, dispatch, analysis and computing, difference configuration for vehicle, carry out corresponding energy management, realize that car load drives the functions such as control, energy-optimised control, feedback braking control and network management.
Electrokinetic cell 300 provides high voltage electric energy (generally more than 300V) for the operation of automobile power, and it comprises a plurality of battery cells that connect by series, parallel or its combination.The motor (not shown) that electrokinetic cell 300 is mainly on the power vehicle provides electric energy, and motor then is used for driving the power vehicle operation; Be connected with high tension loop between electrokinetic cell 300 and the motor.In addition, also be provided with the charger (not shown) on the power vehicle, be connected with charge circuit between charger and the electrokinetic cell 300; When the electric energy of electrokinetic cell 300 is not enough, can be that electrokinetic cell 300 charges by the charging device that is arranged on charging station.
Battery management system 100 is used for dynamics of management battery 300, detect the operating state of electrokinetic cell 300, prevent super-charge super-discharge etc. to the damage behavior of battery, and its dump energy made comparatively accurately estimate, to pass to timely and effectively for information about entire car controller 200, in order to carry out reasonable distribution by 200 pairs of car load energy of entire car controller, so that vehicle reaches good running status.In the present embodiment, battery management system 100 comprises host CPU (central processing unit, CPU) 10, secondary CPU 20 and auxiliary rechargable power supplies 30.
Host CPU 10 is used for gathering the parameter of electrokinetic cell 300 and receives out of Memory, the data that receive are processed, to entire car controller 200 upload process results, and produce control signal and export to performance element 500 according to result, host CPU 10 also sends working signal to secondary CPU 20 simultaneously.Wherein, the parameter of the electrokinetic cell 300 that host CPU 10 gathers comprises, such as battery total voltage, electric current, monomer battery voltage, battery temperature etc.; The out of Memory of the electrokinetic cell 300 that host CPU 10 gathers comprises, high level signal that sends such as crash sensor etc.; Host CPU 10 send to secondary CPU 20 working signal can for, PWM(Pulse Width Modulation for example, pulse width modulation) signal; The control signal that host CPU 10 produces is mainly the control signal for control charge circuit, electrokinetic cell system high tension loop, low-voltage power supply loop and warning system.When unusual condition appearred in host CPU 10, then host CPU 10 stopped to send working signal to secondary CPU 20.The situation that operation irregularity appears in host CPU 10 mainly comprises: software or hardware failure in the host CPU 10 cause host CPU 10 to work, and perhaps power supply 400 inefficacies cause host CPU 10 to lose power supply and quit work.
Secondary CPU 20 has resting state and operating state.If host CPU 10 is working properly, secondary CPU 20 can receive the working signal of central processing unit 10 outputs, then secondary CPU 20 is according to the working signal of the central processing unit 10 that receives, confirm that host CPU 10 is in normal operating conditions at present, secondary CPU 20 just is in resting state automatically at this moment, to reduce energy consumption.When being in resting state, secondary CPU 20 only receives the working signal from host CPU 10, and does not receive the parameter from electrokinetic cell 300, such as the battery total voltage of electrokinetic cell 300, electric current, monomer battery voltage, battery temperature etc.If host CPU 10 operation irregularities, the signal that secondary CPU 20 can't receive the working signal of central processing unit 10 output or receive host CPU 10 outputs is fault-signal, then secondary CPU 20 confirms that host CPU 10 is in abnormality at present, secondary CPU 20 just wakes and enters operating state automatically up from resting state at this moment, adapter is to management and the control of electrokinetic cell 300, receives from the parameter of the electrokinetic cell 300 battery total voltage of electrokinetic cell 300 for example, electric current, monomer battery voltage, battery temperature etc.Be appreciated that in order to save cost, secondary CPU 20 can adopt than host CPU 10 processor of low side more, has guaranteed the reduction of the cost of battery management system 100.
Performance element 500 for example is the relay in charge circuit, electrokinetic cell system high tension loop, low-voltage power supply loop and the warning system, the operation that is used for carrying out the control signal of host CPU 10 or secondary CPU 20 outputs and carries out Push And Release, thus allow electrokinetic cell system to discharge and recharge, cut off the operations such as electrokinetic cell system high tension loop or execution warning.Under the normal condition, performance element 500 is by power supply 400 power supplies.
Power supply 400 output LOW voltages are such as 12V, for battery management system 100 provides electric energy.Power supply 400 can be automobile accumulate pond, such as lead acid accumulator.When battery management system 100 normal operation, power supply 400 is given host CPU 10, secondary CPU 20 and 30 power supplies of auxiliary rechargable power supplies simultaneously.In order to adapt to the operating voltage of host CPU 10, secondary CPU 20, such as 5V, preferably, be provided with transformer 40 between power supply 400 and host CPU 10, the secondary CPU 20.Host CPU 10, secondary CPU 20 can share a transformer 40, also can be respectively with a transformer 40(as shown in Figure 1), the 12V voltage transitions that transformer 40 provides power supply 400 is host CPU 10 and the required 5V voltage of secondary CPU 20 work.Be connected with the low-voltage power supply loop between power supply 400 and performance element 500, host CPU 10, secondary CPU 20 and the auxiliary rechargable power supplies 30.
Auxiliary rechargable power supplies 30 is used for powering to secondary CPU 20 when power supply 400 loses efficacy, and the voltage of its output is the operating voltage of secondary CPU 20, such as 5V.Auxiliary rechargable power supplies 30 for example can be given this rechargeable battery charging by the 12V power supply of power supply 400 under the normal condition for carrying the 5V rechargeable battery on the power battery management system hardware circuit board, prevents the brownout of this rechargeable battery of overlong time; When unusual condition appears in power supply 400, give secondary CPU 20 power supplies by this auxiliary rechargable power supplies 30, guarantee the normal operation of secondary CPU 20.
Auxiliary power supply control unit 600 is connected between performance element 500 and the auxiliary rechargable power supplies 30, makes auxiliary rechargable power supplies 30 provide electric energy for performance element 500.When power supply 400 lost efficacy, high voltage supply may be cut off simultaneously, auxiliary rechargable power supplies 30 can partly provide low tension for high voltage control by auxiliary power supply control unit 600, connect high tension loop, make car load can continue downrating, guarantee that electric automobile can slowly run off the roadway, or open to repairing the some maintenance.
Battery management system 100 of the present invention, when the software in the host CPU 10 or hardware failure caused host CPU 10 to work, host CPU 10 stopped the output services signal to secondary CPU 20.In the time can't receiving the working signal of host CPU 10, secondary CPU 20 wakes up automatically, enter operating state from resting state, adapter is to management and the control of electrokinetic cell 300, secondary CPU 20 gathers parameter such as the voltage of electrokinetic cells 300 at this moment, electric current and temperature etc., but do not receive the out of Memory of freely crash sensor and charger to reduce load, the electrokinetic cell parameter information of necessity is reported entire car controller 200, inform simultaneously entire car controller 200, battery management system 100 has broken down, need downrating and as early as possible parking checking repairing, secondary CPU 20 cuts off the high voltage supply of 300 pairs of motors of electrokinetic cell voluntarily by performance element 500 where necessary, to guarantee safety.
When power supply 400 inefficacies cause host CPU 10 to quit work, host CPU 10 stops the output services signal, secondary CPU 20 wakes up automatically, enter operating state, take over management and the control of battery management system 100, give secondary CPU 20 power supplies by auxiliary rechargable power supplies 30 this moment.Similar when the action of secondary CPU 20 and host CPU 10 softwares or hardware failure, be not repeated herein.Because power supply 400 power supplies go wrong, the high voltage supply of 300 pairs of motors of electrokinetic cell may be cut off simultaneously, this moment, auxiliary rechargable power supplies 30 provided stable low-voltage electric energy by auxiliary power supply control unit 600 for performance element 500, connect the high tension loop of electrokinetic cell system by low tension loop, make car load can continue downrating, guarantee that electric automobile can slowly run off the roadway, or open to repairing the some maintenance.
Please refer to Fig. 2, a kind of automobile power cell management method of using above-mentioned automobile batteries management system 100, its step comprises:
(1) utilize the host CPU 10 of battery management system 100 to gather battery parameters and battery parameter is carried out analyzing and processing, result reported entire car controller 200, and according to result transfer control signal to performance element 500;
(2) utilize host CPU 10 to transmit working signal to the secondary CPU 20 of battery management system 100, secondary CPU 20 receives the working signal from host CPU 10;
(3) utilize secondary CPU 20 to judge according to the working signal of host CPU 10 whether host CPU 10 is in normal operating conditions; If so, then secondary CPU 20 is in resting state; Otherwise secondary CPU 20 automatically wakes up and enters operating state, and takes over the work of host CPU 10.
Wherein, in step (3), when secondary CPU 20 can receive working signal (such as pulse width modulating signal) from host CPU 10, judge that then host CPU 10 is in normal operating conditions; When secondary CPU 20 can't receive working signal from host CPU 10, judge that then host CPU 10 is in abnormal operating state.
In above-mentioned automobile power cell management method, also comprise and utilize power supply 400 to battery management system 100 power supplies, when host CPU 10 is powered inefficacy, software own or hardware failure cisco unity malfunction because of power supply 400, host CPU 10 will stop transportation work signal (such as pulse width modulating signal) to secondary CPU 20.
In above-mentioned automobile power cell management method, also comprised when power supply 400 power supplies were lost efficacy, utilize auxiliary rechargable power supplies 30 to secondary CPU 20 power supplies, and utilize the auxiliary rechargable power supplies 30 of auxiliary power supply control unit 600 controls to the electric energy output of performance element 500.
In above-mentioned automobile power cell management method, also comprised when power supply 400 power supplies were lost efficacy, utilize auxiliary rechargable power supplies 30 partly to provide low-voltage electric energy by auxiliary power supply control unit 600 for high voltage control, to connect car inner high voltage loop.
According to above-mentioned, adopt automobile batteries management system 100 of the present invention or battery management method, when host CPU 10 cisco unity malfunction, secondary CPU 20 wakes up automatically, take over the work of host CPU 10, thereby can be in the software of power supply 400 power supply or host CPU 10 or situation that hardware goes wrong, automobile still can move preferably at short notice, has good redundancy feature.
The above, only be embodiments of the invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims (10)

1. an automobile power cell management system (100), it is characterized in that: comprise host CPU (10) and secondary CPU (20), described host CPU (10) is used for gathering the parameter of electrokinetic cell (300) and parameter is processed, and outputs control signals to performance element (500) according to result; Described host CPU (10) also is used for to described secondary CPU (20) output services signal; When described secondary CPU (20) received from the described working signal of described host CPU (10), described secondary CPU (20) was in resting state; When described secondary CPU (20) can't receive from the described working signal of described host CPU (10), described secondary CPU (20) automatically wakes up from resting state and enters operating state, and takes over the work of described host CPU (10).
2. automobile power cell management system as claimed in claim 1 (100), it is characterized in that: described automobile power cell management system (100) also comprises power supply (400) and auxiliary rechargable power supplies (30), and described host CPU (10), described secondary CPU (20) and described auxiliary rechargable power supplies (30) are powered by power supply (400); When described power supply (400) power supply was lost efficacy, described auxiliary rechargable power supplies (30) was given described secondary CPU (20) power supply.
3. automobile power cell management system as claimed in claim 2 (100) is characterized in that: be connected with auxiliary power supply control unit (600) between described performance element (500) and the described auxiliary rechargable power supplies (30); When described power supply (400) power supply was lost efficacy, described auxiliary rechargable power supplies (30) was given described performance element (500) power supply by described auxiliary power supply control unit (600).
4. such as each described automobile power cell management system (100) of claims 1 to 3, it is characterized in that: described working signal is pulse width modulating signal.
5. automobile power cell management method, its step comprises:
(1) utilize the host CPU (10) of battery management system (100) to gather battery parameter and described battery parameter is carried out analyzing and processing, and according to result transfer control signal to performance element (500);
(2) utilize host CPU (10) to transmit working signal to the secondary CPU (20) of battery management system, secondary CPU (20) receives the working signal from host CPU (10);
(3) utilize secondary CPU (20) to judge according to the working signal of host CPU (10) whether host CPU (10) is in normal operating conditions; If so, then secondary CPU (20) is in resting state; Otherwise secondary CPU (20) automatically wakes up and enters operating state, and takes over the work of host CPU (10).
6. automobile power cell management method as claimed in claim 5, it is characterized in that: in described step (3), when described secondary CPU (20) can receive working signal from described host CPU (10), judge that then described host CPU (10) is in normal operating conditions; When described secondary CPU (20) can't receive working signal from described host CPU (10), judge that then described host CPU (10) is in abnormal operating state.
7. automobile power cell management method as claimed in claim 6, it is characterized in that: also comprise and utilize power supply (400) to described battery management system (100) power supply, when described host CPU (10) can not be worked because of described power supply (400) power supply inefficacy, software own or hardware actual effect, described host CPU (10) stopped the transportation work signal to described secondary CPU (20).
8. automobile power cell management method as claimed in claim 7 is characterized in that: when described power supply (400) power supply was lost efficacy, also comprise and utilize auxiliary rechargable power supplies (30) to described secondary CPU (20) power supply.
9. automobile power cell management method as claimed in claim 8, it is characterized in that: when described power supply (400) power supply was lost efficacy, also comprise and utilize auxiliary power supply control unit (600) the described auxiliary rechargable power supplies of control (30) to described performance element (500) power supply.
10. such as each described automobile power cell management method of claim 5 to 9, it is characterized in that: described working signal is pulse width modulating signal.
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US10035424B2 (en) 2015-12-02 2018-07-31 Borgward Trademark Holdings Gmbh Battery management system, vehicle and method for controlling main relay
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CN112425023A (en) * 2018-07-11 2021-02-26 株式会社村田制作所 Control device, battery pack, electric vehicle, control method, and control method for battery pack
CN111044912A (en) * 2018-10-12 2020-04-21 宁德时代新能源科技股份有限公司 Dormancy monitoring system and method
CN111044912B (en) * 2018-10-12 2021-10-01 宁德时代新能源科技股份有限公司 Dormancy monitoring system and method
CN110588367A (en) * 2019-09-12 2019-12-20 安徽合力股份有限公司 High-voltage lithium battery forklift control system and control method thereof
CN113517477A (en) * 2021-03-04 2021-10-19 淮安骏盛新能源科技有限公司 Auxiliary monitoring method and alarm device for thermal runaway of power battery in battery pack
CN114475252A (en) * 2022-01-29 2022-05-13 广东汇天航空航天科技有限公司 Data processing system and method for vehicle battery, vehicle and storage medium

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Application publication date: 20130925