CN103138017B - Battery control apparatus - Google Patents
Battery control apparatus Download PDFInfo
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- CN103138017B CN103138017B CN201210507820.0A CN201210507820A CN103138017B CN 103138017 B CN103138017 B CN 103138017B CN 201210507820 A CN201210507820 A CN 201210507820A CN 103138017 B CN103138017 B CN 103138017B
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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
Abstract
The invention relates to a battery control apparatus capable of detecting micro-short circuit during interruption. The battery control apparatus is provided with a battery (100) containing a plurality of single batteries (C1-CN), wherein the battery is provided with an adjustment unit adjusting voltage or a charging state of the plurality of single batteries to regulated target values; a calculation unit calculating actual adjustment time, adjustment time of per unit time of actual adjustment and adjustment capacity of actual adjustment until voltage or the charging state of the plurality of single batteries is adjusted to the regulated target values; a storage unit storing a calculation value obtained by the calculation unit; and a determination unit utilizing the above calculation value to determine faises caused by the micro-short circuit in the battery.
Description
Technical field
The present invention relates to the control device of battery pack.
Background technology
The known checkout gear that the exception of electrical storage device is detected, this electrical storage device is by being undertaken connecting forming by the multiple Reserve Power Divisions at least comprising a charge storage element, the abnormal detector of this electrical storage device possesses: equalization handling part, and its multiple exercise makes the process of the deviation equalization of the respective capacity in above-mentioned multiple Reserve Power Division or voltage; Equalization process interval calculation portion, it is when above-mentioned equalization handling part finishes an equalization process, calculates this equalization process and time interval between another equalization process performed before this equalization process; Abnormal generation warns judging part, shorter than the time set as above-mentioned electrical storage device should be judged as to be in the state close with abnormality there is warning judging part and be judged as that above-mentioned electrical storage device is in the state close with abnormality in this exception the time interval calculated in above-mentioned equalization process interval calculation portion; Abnormal judgment value calculating part, when above-mentioned abnormal generation warning judging part is judged as that above-mentioned electrical storage device is in the state close with abnormality, this abnormal judgment value calculating part is used in the charge/discharge capacity of above-mentioned electrical storage device measured after this judgement, calculates and carries out integration to the absolute value of the charging and discharging currents of above-mentioned electrical storage device and the abnormal judgment value that obtains; And extremely judge handling part, when the abnormal judgment value that above-mentioned abnormal judgment value calculating part calculates is more than or equal to the fiducial value of the regulation set as above-mentioned electrical storage device should be judged as to be in abnormality, this exception judges that handling part is judged as that above-mentioned electrical storage device is in abnormality (patent documentation 1).
Patent documentation 1: Japanese Unexamined Patent Publication 2008-134060 publication
Summary of the invention
the problem that invention will solve
But, there is following problem: between the stand-down that abnormal detector stops, integration can not be carried out to charging and discharging currents, the exception of the battery occurred between this stand-down cannot be detected.
The problem to be solved in the present invention is to provide a kind of control device of battery pack, can detect the micro-short circuit occurred between stand-down.
for the scheme of dealing with problems
The present invention is solved the problem by following mode: the regulation time calculating actual needs till the voltage of multiple monocell or charged state are adjusted to desired value, the actual adjustment number of times carrying out each unit interval adjusted of Use Adjustment unit, the actual adjustment capacity carrying out adjusting of Use Adjustment unit, the slope of the calculated value before when between the stand-down of control device and between stand-down after the difference of slope of calculated value within the limits prescribed and between stand-down before and after the variable quantity of calculated value than when representing that the threshold value of micro-short circuit is large, be judged as the exception that there occurs battery pack due to the micro-short circuit in battery pack.
the effect of invention
According to the present invention, by comparing the slope of the calculated value before and after between stand-down, the change of the calculated value caused due to deterioration of battery between stand-down can be grasped, and micro-short circuit can be detected according to the variable quantity of the calculated value before and after between stand-down, therefore, it is possible to detect the exception of the battery pack caused because of micro-short circuit accurately.
Accompanying drawing explanation
Fig. 1 is the structure chart comprising the battery pack system of the control device of battery pack involved by embodiments of the present invention.
Fig. 2 is the block diagram of the battery controller of Fig. 1.
Fig. 3 is the curve chart of regulation time characteristic in respect of time in the battery pack representing Fig. 1.
Fig. 4 is the flow chart of the rate-determining steps represented in the battery controller of Fig. 2.
Fig. 5 is in the control device of the battery pack involved by other execution mode of the present invention, the curve chart of regulation time characteristic in respect of time in battery pack.
Fig. 6 is in the control device of the battery pack involved by other execution mode of the present invention, represents the flow chart of the rate-determining steps of battery controller.
Fig. 7 is the curve chart of regulation time characteristic in respect of time in the control device of the battery pack represented involved by variation of the present invention.
description of reference numerals
100: battery pack; C1 ~ CN, Cp: monocell; 102: temperature sensor; 200: load; 300: current sensor; 400: capacity Circuit tuning; 401: resistance; 402: switch; 500: battery controller; 501: voltage detection department; 502: current detecting part; 503: battery temperature test section; 504: capacity adjustment part; 505: control part; 506: abnormality determiner; 507: storage part; 508: calculating part; 509: actual measurement portion; 510: Department of Communication Force.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.
First execution mode
Fig. 1 is the structure chart comprising the battery pack system of the control device of battery pack involved by present embodiment.Below, the situation that the battery pack system involved by example present embodiment is used as for motor vehicle battery of motor vehicle driven by mixed power, electric automobile etc. is described.
As shown in Figure 1, the battery pack system involved by present embodiment possesses: battery pack 100, and it possesses the multiple monocell C1 ~ CN be connected in series; Load 200, it is connected electrically in the two ends of battery pack 100; Capacity Circuit tuning 400, it is for carrying out capacity adjustment to battery pack 100; And battery controller 500, it controls battery pack system entirety.
N number of monocell C1 ~ CN is connected in series and forms by battery pack 100.As each monocell C1 ~ CN, can enumerate the organic electrolyte secondary cells such as alkaline battery, lithium ion battery etc. such as Ni-MH battery, but in the present embodiment, example employs lithium ion battery and is described as the situation of monocell C1 ~ CN.In addition, also comprise be connected in parallel and the identical and multiple batteries that can be regarded as the state of monocell of measurable terminal voltage as monocell C1 ~ CN.In addition, the number N of monocell is not particularly limited, and suitably can set according to expectation.In addition, battery pack 100 possesses temperature sensor 102, and this temperature sensor 102 is for measuring the temperature of the monocell C1 ~ CN forming battery pack 100.Measure by temperature sensor 102 battery temperature obtained and be sent to battery controller 500.
The N number of monocell C1 ~ CN forming battery pack 100 is connected in parallel to capacity Circuit tuning 400 respectively.Capacity Circuit tuning 400 is made up of resistance 401, switch 402, by turn on-switch 402, and carries out capacity adjustment electric discharge to monocell, can carry out capacity adjustment to monocell.In addition, switching on and off of each switch 402 is controlled by battery controller 500.
Load 200 is such as be mounted in motor in motor vehicle driven by mixed power, electric automobile vehicle etc. and inverter, and such as, when Regeneration control, via motor and inverter, be inversely transformed into electric energy, battery pack 100 can be charged.In addition, such as battery pack 100 also can be charged by being connected with not shown external power source.
Fig. 2 is the block diagram of the function of battery controller 500.As shown in Figure 2, battery controller 500 possesses voltage detection department 501, current detecting part 502, battery temperature test section 503, capacity adjustment part 504, control part 505, abnormality determiner 506, storage part 507, calculating part 508, actual measurement portion 509, Department of Communication Force 510.
Voltage detection department 501 via the multiple terminal lines be connected with each monocell C1 ~ CN with the cycle specified temporally sequence measuring formed the magnitude of voltage of the terminal voltage of each monocell C1 ~ CN of battery pack 100 thus detected, the terminal voltage measuring each monocell obtained is converted to digital signal from analog signal, and is sent to control part 505.In addition, as the method for the terminal voltage of each monocell of measurement, such as, striding capacitance mode etc. can be enumerated.
Current detecting part 502 obtains with the cycle of regulation and detects by current sensor 300 charging and discharging currents obtained, and obtained charging and discharging currents is converted to digital signal from analog signal, and is sent to control part 505.In addition, current sensor 300 is such as made up of resistive element, current transformer etc.
Battery temperature test section 503 obtains with the cycle of regulation the temperature that each monocell C1 ~ CN obtained measured by the temperature sensor 102 possessed by battery pack 100, the temperature of obtained each monocell C1 ~ CN is converted to digital signal from analog signal, and is sent to control part 505.
The deviation of the charged state (SOC:State of Charge) of the terminal voltage in each monocell C1 ~ CN or each monocell C1 ~ CN is more than setting, capacity adjustment part 504 is according to the capacity adjustment instruction from control part 505, control switching on and off of each switch 402 that each capacity Circuit tuning 400 possesses, thus capacity adjustment is carried out to battery pack 100.
Control part 505 is according to each data of the terminal voltage of each monocell C1 ~ CN received from voltage detection department 501, current detecting part 502, battery temperature test section 503, charging and discharging currents, battery temperature, and the capacity adjustment carried out for making capacity adjustment part 504 carry out capacity adjustment controls.Specifically, control part 505 first target setting equalization voltage V
tar, this target equalization voltage V
tarthe voltage of the voltage equalization of each monocell C 1 ~ CN for making formation battery pack 100.In addition, as target equalization voltage V
tarbeing not particularly limited, can being set as arbitrary value, such as, is target equalization voltage V by the minimum voltage sets in the voltage of monocell C1 ~ CN
tar.Or, also can by battery pack 100 be full of assigned voltage near electricity or predetermined assigned voltage (being such as full of piezoelectric voltage, close to the assigned voltage being full of piezoelectric voltage) is redefined for target equalization voltage V
tar.By the target equalization voltage V set like this
tarbe stored in the memory (not shown) that battery controller 500 possesses.In addition, control part 505 obtains maximum voltage value and minimum amount of voltage that from the voltage between terminals of each monocell C 1 ~ CN, and calculates its voltage difference.And, when this voltage difference is more than the voltage difference threshold value preset, generation capacity adjustment instruction, and generated capacity adjustment instruction is sent to capacity adjustment part 504, this capacity adjustment instruction controls to make each monocell C1 ~ CN forming battery pack 100 at target equalization voltage V for making capacity adjustment part 504 carry out
tarplace becomes impartial voltage.
At this, voltage difference threshold value refers to following such threshold value: the inclined extent of this voltage difference threshold value and each monocell adapts, and makes deflection condition become strict by reducing this threshold value, makes deflection condition become loose by increasing this threshold value.In this example, also voltage difference threshold value can be changed into arbitrary value.
And capacity adjustment part 504, according to capacity adjustment instruction, makes the switch 402 of the monocell C1 ~ CN as regulating object connect, carries out capacity adjustment thus in the regulation time calculated by actual measurement portion 509 described later.Voltage detection department 501 also detects the voltage of monocell in capacity adjustment.And, when the detection voltage of the monocell in capacity adjustment becomes target equalization voltage V
tartime, control part 505 sends the instruction representing the adjustment of end capacity to capacity adjustment part 504.Capacity adjustment part 504 makes switch 402 disconnect according to this instruction, terminates capacity adjustment thus.Capacity adjustment part 504 and control part 505, for other battery as regulating object, carry out capacity adjustment similarly.Thus, capacity adjustment part 504, by controlling switching on and off of each switch 402, so carries out controlling to make the voltage of each monocell C1 ~ CN at target equalization voltage V
tarplace becomes impartial, can carry out capacity adjustment thus.Or, capacity adjustment part 504 controls switching on and off of each switch 402 according to capacity adjustment instruction, carry out capacity adjustment thus to make each monocell C1 ~ CN become assigned voltage respectively, afterwards, in battery pack 100, repeatedly carry out discharge and recharge, so carry out controlling also to make the voltage of each monocell C1 ~ CN at target equalization voltage V
tarplace becomes impartial.
Abnormality determiner 506 is following judging parts: use to be stored in and adjust relevant data to detect to the capacity of monocell C1 ~ CN the micro-short circuit occurred in battery pack 100 in storage part 507, and judges the exception of battery pack 100.In addition, below in specification exception judging part 506 for judging the control of the exception of battery pack 100.
Storage part 507 is following memories: using the regulation time needed for the capacity of the monocell C1 ~ CN as the calculated value calculated by calculating part 508 adjusts, adjustment or end time etc. adjust relevant data to the capacity of battery pack 100 and store with time series.
Calculating part 508 calculates, by capacity adjustment part 504, the voltage of each monocell C1 ~ CN is set to target equalization voltage V
tartill time, be used as regulation time.When carrying out capacity adjustment by electric discharge, the regulation time of adjustment capacity is equivalent to the time that each switch 402 is connected.Owing to carrying out switching on and off of control switch 402 by capacity adjustment part 504, therefore, in the control of capacity adjustment part 504, the turn-on time of switch 402 is measured in actual measurement portion 509, can calculate actual capacity regulation time thus.And the moment that the regulation time calculated and enforcement capacity adjust is stored in storage part 507 by calculating part 508 explicitly.
In addition, can carry out calculated capacity regulation time according to the resistance value of the detection voltage of each monocell C1 ~ CN and resistance 401, therefore actual measurement portion 509 also can calculate by utilizing the detection voltage of each monocell C1 ~ CN, carrys out calculated capacity regulation time thus.In addition, when carrying out capacity adjustment by discharge and recharge, also can by calculating from adjustment time play each monocell C1 ~ CN voltage become target equalization voltage V
tartill time, carry out calculated capacity regulation time.
When detecting the exception of battery pack 100 by abnormality determiner 506, not shown reporting unit is lighted by making not shown emergency warning lamp etc., carrys out the exception of report battery group 100.Department of Communication Force 510 is the communicator result that the exception of the battery pack 100 judging to obtain by abnormality determiner 506 judges externally communicated.
Then, Fig. 2 and Fig. 3 is used to illustrate in battery controller 500 control that the exception of battery pack 100 judges.Fig. 3 is the curve chart representing regulation time characteristic in respect of time.
In order to be judged the exception of battery pack 100 by abnormality determiner 506, calculating part 508 uses to be stored in and adjusts relevant data to the capacity of battery pack 100 in storage part 507, calculates the slope of the regulation time of temporally series arrangement.In addition, calculating part 508 uses these data to calculate the variable quantity of the regulation time before and after between abnormality determiner 506 out-of-operation stand-down.
During referring between stand-down that abnormality determiner 506 is not monitored the exception of battery pack 100.Such as, and what be connected to the relay switch (not shown) between battery pack 100 and load 200 switches on and off interlock, when abnormality determiner 506 monitors the exception of battery pack 100, between stand-down, be equivalent to the off period of this relay switch.Or, with the main switch (not shown) of vehicle switch on and off interlock, when abnormality determiner 506 monitors the exception of battery pack 100, between stand-down, be equivalent to the off period of this main switch.
Then, the passing of regulation time when using Fig. 3 that temporally series arrangement is described.As shown in Figure 3, from the time of starting at (0) to time (t
1) till during and time (t
2) later during be abnormality determiner 506 operate on-stream period between, from time (t
1) to time (t
2) till during be between abnormality determiner 506 out-of-operation stand-down.
During operation, battery pack 100 is supplied electric power to load 200 or is charged by the Regeneration control being included in the motor in load 200, and the voltage therefore between monocell C1 ~ CN deviation can occur.And, when the voltage difference between monocell C1 ~ CN reaches voltage difference threshold value, carry out capacity adjustment by capacity adjustment part 504.
Voltage difference between monocell C1 ~ CN can increase along with battery pack 100 deterioration in time, and therefore along with time process, the regulation time of capacity adjustment is also elongated.Therefore, as shown in Figure 3, in the running, regulation time and the time elongated through pro rata.In addition, corresponding to the slope S of the regulation time of time middle between on-stream period
1(regulation time of each unit interval) change ratio of regulation time for causing because of the deterioration of battery pack 100.
In addition, at time (t
1) time the duration of runs terminate, when there is not deviation in the voltage between monocell C1 ~ CN, (t between stand-down
1~ t
2) in, as long as voltage does not have deviation, just do not carry out capacity adjustment, do not obtain the data of regulation time.
At this, suppose in battery pack 100, to there occurs micro-short circuit between stand-down.In this case, owing to there occurs voltage drop in the monocell that there occurs micro-short circuit, therefore, the voltage difference that there occurs the monocell of micro-short circuit and the voltage of other normal monocell becomes large.The capacity deterioration of micro-short circuit and monocell C1 ~ CN, the deterioration of internal resistance are different, be not with the time through and occur, also likely occur in short time short when between the operating period of monocell C1 ~ CN.And when there occurs micro-short circuit, compared with the voltage drop caused with the deterioration because of monocell C1 ~ CN, voltage effect when there is micro-short circuit is large.
Therefore, at time (t
2) time when again becoming between on-stream period, time (t
2) regulation time than time (t
1) regulation time long.And, at time (t
2) in later duration of runs, and to time (t
1) till the duration of runs similarly, due to the deterioration of battery pack 100, regulation time and time are elongated pro rata.Time (t
2) slope (S of regulation time of later duration of runs
2) and time (t
1) slope (S of regulation time of former duration of runs
1) identical.
In addition, different from this example, by means of only the slope of regulation time in comparing between on-stream period and threshold value to detect the exception of battery pack 100 time, as shown in Figure 3, when there occurs micro-short circuit in when between stand-down, the slope (S before and after between stand-down
1and S
2) be not very different, therefore, likely omit the exception of the battery pack 100 caused because of the micro-short circuit between stand-down.
Therefore, in the present example, abnormality determiner 506 as follows according to the slope of the regulation time before and after between stand-down, between stand-down before and after the variable quantity of regulation time, judge the exception of the battery pack 100 caused because of the micro-short circuit in battery pack 100.
Abnormality determiner 506 between stand-down after rerun time, judge whether to there occurs micro-short circuit.When detecting micro-short circuit, after the rerunning of abnormality determiner 506, calculating part 508 calculates the slope (S of regulation time
2), mistakenly the exception that the deterioration because of battery pack 100 causes can not be judged as the exception because micro-short circuit causes thus.And abnormality determiner 506 calculates the slope (S of the regulation time before between stand-down of being calculated by calculating part 508
1) and stand-down between after the slope (S of regulation time
2) between the difference (S of slope
2-S
1).
Also can be, at slope calculations (S
1and S
2) time, calculating part 508 by the regulation time be stored in storage part 507 temporally sequence arrange, if x-axis is the time, if y-axis is regulation time, carries out linear regression calculating, carry out slope calculations approx according to regression straight line.Or also can be, according to time t
1with time t
2multiple regulation time that close Time Calculation obtains calculate.
In abnormality determiner 506, be preset with and consider battery pack 100 error etc. of deterioration, regulation time and the scope of the variable quantity of the slope of expression regulation time that obtains in time, be i.e. permissible range (-Sc ~ Sc).And abnormality determiner 506 judges the difference (S of this slope
2-S
1) whether be in permissible range.At the difference (S of slope
2-S
1) when being in permissible range, abnormality determiner 506 judges whether the change of regulation time causes because battery pack 100 deterioration in time.On the other hand, at the difference (S of slope
2-S
1) when being in beyond permissible range, abnormality determiner 506 is judged as exception etc. due to resistance 401 and there occurs exception.
At the difference (S of slope
2-S
1) when being in permissible range, in order to detect the micro-short circuit between stand-down, calculating part 508 calculate immediately between stand-down before a upper regulation time, be used as the regulation time before between stand-down (Fig. 3 with time t
1corresponding regulation time).In addition, calculating part 508 calculates regulation time when to carry out capacity adjustment at first after rerunning, be used as the regulation time after between stand-down (Fig. 3 with time t
2corresponding regulation time).And calculating part 508, by obtaining the difference between the regulation time after the off time and the regulation time before the off time, calculates the variable quantity (Δ A) (with reference to Fig. 3) of the regulation time before and after between stand-down.
In abnormality determiner 506, be preset with judgment threshold (Ac) and be used as representing the threshold value that there occurs micro-short circuit.And variable quantity (Δ A) and judgment threshold (Ac) compare by abnormality determiner 506.When variable quantity (Δ A) is larger than judgment threshold (Ac), abnormality determiner 506 is judged as: there occurs micro-short circuit between stand-down, there occurs exception due to micro-short circuit in battery pack 100.On the other hand, when variable quantity (Δ A) is less than judgment threshold (Ac), abnormality determiner 506 is judged as that battery pack 100 is normal.
Then, use Fig. 4 that the rate-determining steps of the battery controller 500 of this example is described.Fig. 4 is the flow chart of the rate-determining steps representing battery controller 500.In addition, if be judged as that battery pack 100 is normal, then repeatedly the controlled circulation shown in Fig. 4 is performed.
In step S 1, voltage detection department 501 detects the terminal voltage of monocell C1 ~ CN with the cycle of regulation.In step s 2, control part 505 determines ceiling voltage and minimum voltage from the detection voltage of each monocell, obtains the difference of ceiling voltage and minimum voltage, calculating voltage difference (Δ V) thus.
In step s3, voltage difference (Δ V) and voltage difference threshold value compare by control part 505.When voltage difference (Δ V) is less than voltage difference threshold value, is judged as the deviation do not occurred between monocell, turns back to step S 1.On the other hand, when more than voltage difference (Δ V) is for voltage difference threshold value, in step s 4 which, capacity is adjusted instruction and is sent to capacity adjustment part 504 by control part 505, capacity adjustment part 504 makes switch 402 connect according to this instruction, implements capacity adjustment.
In step s 5, capacity adjustment part 504, according to the detection voltage of voltage detection department 501, judges whether the voltage as whole monocells of capacity regulating object is target equalization voltage V
tar, judge whether capacity adjustment terminates thus.When capacity adjustment does not terminate, proceed capacity adjustment by capacity adjustment part 504 and control.When capacity adjustment terminates, transfer to step S 6.
In step s 6, the regulation time in the capacity adjustment control of calculating part 508 calculation procedure S4 and step S 5, and the moment after itself and adjustment is stored in storage part 507 explicitly.In step S 7, the exception that control part 505 judges whether to carry out abnormality determiner 506 judges to control.In this example, mainly carry out exception for detecting the micro-short circuit between stand-down and judge to control, therefore control part 505 such as between stand-down after, when having carried out driving, the exception of carrying out this example has judged to control again.In addition, whether control part 505 according to the signal from not shown main switch, can detect and carried out driving again.And, when not carrying out exception and judging to control, terminate the control of this example.
When carrying out exception and judging to control, in step S71, calculating part 508, according to the data be stored in storage part 507, calculates the slope (S of the regulation time before and after between stand-down
1and S
2).In step S 72, calculating part 508, according to the data be stored in storage part 507, calculates the variable quantity (Δ A) of the regulation time before and after between stand-down.
In step S73, abnormality determiner 506 judges the difference (S of the slope of the regulation time before and after between stand-down
2-S
1) whether in permissible range (-Sc ~ Sc), namely whether this difference is greater than-Sc and is less than Sc.At the difference (S of slope
2-S
1) in permissible range (-Sc ~ Sc), in step S74, abnormality determiner 506 judges whether variable quantity (Δ A) is greater than judgment threshold (Ac).
When variable quantity (Δ A) is greater than judgment threshold (Ac), in step S75, abnormality determiner 506 is judged as: cause battery pack 100 to there occurs exception due to the micro-short circuit in battery pack 100.Control part 505 judges according to the exception of the micro-short circuit obtained by abnormality determiner 506, come control report portion and Department of Communication Force 510, reporting unit report expression there occurs the abnormal meaning because of micro-short circuit, expression be there occurs the abnormal meaning because of micro-short circuit and is sent to outside by Department of Communication Force 510.
Turn back to step S73, at the difference (S of slope
2-S
1) when permissible range (-Sc ~ Sc) is outer, in step S76, abnormality determiner 506 is judged as: there occurs exception due to other reason outside the micro-short circuit between stand-down.
Turn back to step S74, when variable quantity (Δ A) for judgment threshold (Ac) below, abnormality determiner 506 is judged as that battery pack 100 is not abnormal, terminates the control of this example.
As mentioned above, in the present invention, the slope of the regulation time before between the stand-down of the abnormality determiner 506 comprised at the control device of battery pack 100 and between stand-down after the difference of slope of regulation time in permissible range, and the variable quantity of the regulation time before and after between stand-down is than when representing that the judgment threshold of micro-short circuit is large, and abnormality determiner 506 is judged as the exception that there occurs battery pack 100 due to the micro-short circuit in battery pack 100.Thus, this example is by confirming the situation of the change size of the slope of the regulation time before and after between stand-down, and confirm not to be subject to the impact that sharply deterioration, subjective interference etc. because of battery pack 100 cause, and then judge the exception of micro-short circuit according to the variable quantity of the regulation time before and after between stand-down, therefore, it is possible to detect the exception of the battery pack 100 caused because of micro-short circuit accurately.In addition, this example can detect the exception of the battery pack 100 caused because of the micro-short circuit between stand-down accurately.
In addition, in this example, the exception of reporting unit report battery group 100.Thus, user can confirm the exception of battery pack 100.In addition, when there occurs the exception of battery pack 100, reporting unit, via Department of Communication Force 510 exception that outside report causes because of the micro-short circuit of battery pack 100 to center etc., can cause thus, to the battery identical with battery pack 100, the attention of abnormal possibility occur from now on.
In addition, in this example, the regulation time of calculating part 508 calculated capacity adjustment, abnormality determiner 506, according to regulation time, detects the exception of the battery pack 100 caused because of micro-short circuit.But also can be, the adjustment number of times of each unit interval of calculating part 508 calculated capacity adjustment that abnormality determiner 506, according to the adjustment number of times of each unit interval, detects the exception of the battery pack 100 caused because of micro-short circuit.
Voltage difference between monocell C 1 ~ CN can increase along with the deterioration in time of battery pack 100, and therefore along with time process, the adjustment number of times of each unit interval of capacity adjustment also increases.And, when arranging the data of the adjustment number of times of each unit interval according to the time series of carrying out capacity adjustment, x-axis is set to the time, when y-axis being set to the adjustment number of times of each unit interval, identically with Fig. 3, the curve chart that the adjustment number of times of each unit interval and time increases pro rata can be obtained.
In addition, when there occurs micro-short circuit, in the monocell that there occurs micro-short circuit, voltage drop occurs, and the voltage difference between monocell C1 ~ CN increases further, and the adjustment number of times of each unit interval after micro-short circuit increases further.And when there occurs micro-short circuit in when between stand-down, the passing of the adjustment number of times of each unit interval in respect of time presents the characteristic identical with Fig. 3.
Therefore, replaced with the adjustment number of times of each unit interval by the regulation time during the exception of the battery pack 100 of being undertaken by battery controller 500 by above-mentioned explanation judges to control, utilize the adjustment number of times of each unit interval also can detect the exception of the battery pack 100 caused because of micro-short circuit.
In addition, in this example, control part 505, also can the detected temperatures of serviceability temperature transducer 102 when using the SOC of monocell C1 ~ CN to judge the deviation of capacity.Between the SOC and the detection voltage of monocell of monocell, there is certain correlation, but this correlation has temperature dependency.And, based on the characteristic of battery, pre-determine voltage-SOC curve and how to change corresponding to battery temperature.Therefore, control part 505, according to the detected temperatures of monocell, calculating corresponding SOC with reference to this curve, calculating SOC by carrying out correction based on temperature sensor 102.
In addition, in this example, the resistance value of resistance 401 is set to fixed value, but also resistance 401 can be set to variable resistor.In addition, under resistance 401 is set to variable-resistance situation, the adjustment capacity (charge/discharge capacity) of the battery before the deviation of calculating part 508 Use Adjustment monocell C1 ~ CN, replaces the adjustment number of times of regulation time and each unit interval.In addition, the difference of the capacity of the battery after the capacity of the battery before adjustment capacity is equivalent to capacity adjustment and capacity adjust.
When being carried out capacity adjustment by capacity adjustment part 504, control part 505 sets the resistance value of resistance 401.In addition, control part 505, by carrying out integration to the detection electric current of current sensor 300 in capacity adjustment, calculates the integrated value of the charging and discharging currents in adjustment.And the resistance value that control part 505 can obtain according to this integrated value and setting calculates adjustment capacity.
And deteriorated in time along with battery pack 100, the voltage difference between monocell C1 ~ CN becomes large, and therefore, adjustment capacity also becomes large.In addition, when there occurs micro-short circuit, in the monocell that there occurs micro-short circuit, voltage drop occurs, the voltage difference between monocell C1 ~ CN increases further, and the adjustment capacity after micro-short circuit increases further.In between the on-stream period identical with Fig. 3 and between stand-down, when there occurs micro-short circuit in when between stand-down, the passing in respect of time of adjustment number of times presents the characteristic identical with Fig. 3.
Therefore, replace with adjustment capacity by the regulation time during the exception of the battery pack 100 of being undertaken by battery controller 500 by above-mentioned explanation judges to control, utilize adjustment capacity also can detect the exception of the battery pack 100 caused because of micro-short circuit.
In addition, also can be that abnormality determiner 506, using the variable quantity of the variable quantity of the regulation time before and after the off time as each unit interval, judges the exception of the battery pack 100 caused because of micro-short circuit in this example.By by variable quantity (Δ A) divided by the time between stand-down, calculate the variable quantity of each unit interval.In addition, also judgment threshold (Ac) can be set to the threshold value corresponding with the variable quantity of each unit interval.Thus, this example can detect the variable quantity of the regulation time of each unit interval between stand-down, detects the exception of the battery pack 100 caused because of micro-short circuit accurately.
Above-mentioned voltage detection department 501 is equivalent to " voltage detection unit " of the present invention, capacity adjustment part 504 is equivalent to " capacity adjustment part " of the present invention, storage part 507 is equivalent to " memory cell ", calculating part 508 is equivalent to " computing unit ", abnormality determiner 506 is equivalent to " judging unit ", reporting unit is equivalent to " reporting unit ", and Department of Communication Force 510 is equivalent to " communication unit ".
Second execution mode
Fig. 5 be represent of the present invention other execution mode battery pack control device in the curve chart of regulation time characteristic in respect of time.In this example, for the first above-mentioned execution mode, a part for the control of the exception judgement of battery pack 100 is different.Structure is in addition identical with the first above-mentioned execution mode, therefore suitably quotes it and records.
Abnormality determiner 506 sets judgment threshold (Ac) based on the length between stand-down, judgment threshold (Ac) is set as between stand-down, longer then judgment threshold (Ac) is larger.
As shown in Figure 5, between stand-down, be Δ t
1when, the variable quantity of the regulation time before and after between stand-down is Δ A
1, but be Δ t between stand-down
2(> Δ t
1) when, the variable quantity of the regulation time before and after between stand-down is Δ A
2, variable quantity (Δ A
2) become than variable quantity (Δ A
1) long.That is, long when between stand-down, the drop-out voltage caused because of micro-short circuit increases, and regulation time when therefore rerunning is elongated.Therefore, this example sets judgment threshold (Ac) based on the length between stand-down.
Become long-standing situation between stand-down under, even if when there is not micro-short circuit in when between stand-down, due to battery pack 100 deterioration, the voltage difference between monocell C1 ~ CN also increases.Therefore, during rerunning after between long-standing stand-down, regulation time is elongated, and the variable quantity (Δ A) before and after between stand-down increases.And, judgment threshold (Ac) is being set to fixed value, when variable quantity (Δ A) before and after between long-term stand-down is larger than judgment threshold (Ac), the change of the regulation time caused because of long-standing deterioration is likely judged as the exception of the battery pack 100 caused because of micro-short circuit by abnormality determiner 506 mistakenly.
On the other hand, in this example, during rerunning after between long-standing stand-down, judgment threshold (Ac) is set as large value, therefore the variable quantity (Δ A) before and after between long-standing stand-down can not be larger than judgment threshold (Ac), and the change of the regulation time caused because of long-standing deterioration can not be judged as the exception of the battery pack 100 caused because of micro-short circuit by abnormality determiner 506 mistakenly.
Then, use Fig. 6 that the rate-determining steps of battery controller is described.Fig. 6 is the flow chart of the rate-determining steps representing battery controller 500.In addition, if be judged as that battery pack 100 is normal, then repeatedly the controlled circulation shown in Fig. 6 is performed.The control content of the step S1 ~ step S7 of Fig. 6 is identical with the control content of the step S1 ~ step S7 of Fig. 4, therefore omits the description.In addition, step S81, the step S82 of Fig. 6, the control content of step S84 ~ step S87 are distinguished identical with the control content of the step S71 ~ step S76 of Fig. 4, therefore omit the description.
After step S82, in step S83, abnormality determiner 506 sets judgment threshold (Ac) based on the length between stand-down, transfers to step S84.
As mentioned above, in this example, abnormality determiner 506 sets judgment threshold based on the length between stand-down.Thereby, it is possible to detect the exception of the battery pack 100 caused because of micro-short circuit accurately.
In addition, also can be in this example, abnormality determiner 506 based on battery pack 100 operating period between length set judgment threshold (Ac), between the operating period that judgment threshold (Ac) is set as battery pack 100, longer then judgment threshold (Ac) is larger.Long when between the operating period of battery pack 100, the degradation of battery pack 100 is high, and the deviation of the voltage difference between monocell C1 ~ CN also becomes large.
Fig. 7 is the curve chart of regulation time characteristic in respect of time in the control device of the battery pack represented involved by variation of the present invention.Characteristic when short between the operating period that curve a represents battery pack 100, characteristic when long between the operating period that curve b represents battery pack 100.As shown in Figure 7, though identical when between stand-down, the degradation of battery pack 100 long between the operating period also uprises, therefore, variable quantity (the Δ A of battery pack 100 long between the operating period
2) than variable quantity (the Δ A of battery pack 100 short between the operating period
1) become large.Therefore, this example sets judgment threshold (Ac) by the length between the operating period based on battery pack 100, can detect the exception of the battery pack 100 caused because of micro-short circuit accurately.
In addition, in this example, abnormality determiner 506 also can use the information relevant to other battery pack 100 received by Department of Communication Force 510 to set judgment threshold.Such as, in other vehicle, the data relevant to battery pack 100 are obtained, and be stored in the database to the center that this other vehicle manages, and the variable quantity of regulation time when there occurs micro-short circuit in the battery pack 100 of other vehicle is also stored in center as past data.When using battery pack 100 in this vehicle, control part 505 receives the information relevant to the variable quantity of regulation time when there occurs micro-short circuit via Department of Communication Force 510.And abnormality determiner 506, according to this information received by Department of Communication Force 510, sets judgment threshold (Ac).
Thus, this example not only can use the data of the battery pack 100 of this vehicle, also uses the data of the battery pack 100 of other vehicle to set judgment threshold, therefore, it is possible to detect the exception of the battery pack 100 caused because of micro-short circuit accurately.
Claims (7)
1. a control device for battery pack, it is for controlling the battery pack comprising the multiple monocells be connected in series, and the feature of the control device of this battery pack is to possess:
Adjustment unit, the voltage of above-mentioned multiple monocell or charged state are adjusted to the desired value of regulation by it;
Computing unit, its calculate and utilize above-mentioned adjustment unit that the voltage of above-mentioned multiple monocell or charged state are adjusted to above-mentioned desired value till actual needs regulation time or utilize that above-mentioned adjustment unit is actual to carry out the adjustment number of times of each unit interval adjusted or utilize the actual adjustment capacity carrying out adjusting of above-mentioned adjustment unit;
Memory cell, it stores the calculated value calculated by above-mentioned computing unit; And
Judging unit, it utilizes the above-mentioned calculated value be stored in said memory cells, according to the slope of the above-mentioned calculated value arranged according to time series and the variable quantity of above-mentioned calculated value, judge between the stand-down of above-mentioned control device due to exception that the micro-short circuit in above-mentioned battery pack causes
Wherein, above-mentioned slope before when between the stand-down of above-mentioned control device and between above-mentioned stand-down after the difference of above-mentioned slope within the limits prescribed and between above-mentioned stand-down before and after above-mentioned variable quantity than when representing that the threshold value of micro-short circuit is large, above-mentioned judging unit is judged as the exception that there occurs above-mentioned battery pack due to the micro-short circuit in above-mentioned battery pack.
2. the control device of battery pack according to claim 1, is characterized in that,
Above-mentioned judging unit sets above-mentioned threshold value according to the length between above-mentioned stand-down.
3. the control device of battery pack according to claim 1, is characterized in that,
Above-mentioned judging unit sets above-mentioned threshold value according between the operating period of above-mentioned battery pack.
4. the control device of battery pack according to claim 1, is characterized in that,
Above-mentioned judging unit sets above-mentioned threshold value according between the operating period of the length between above-mentioned stand-down and above-mentioned battery pack.
5. the control device of the battery pack according to any one in Claims 1 to 4, is characterized in that,
Also possess voltage detection unit, this voltage detection unit detects the magnitude of voltage of above-mentioned multiple monocell,
Above-mentioned adjustment unit has the resistance and switch that the capacity that is connected with above-mentioned monocell adjusts,
Above-mentioned adjustment unit, according to the above-mentioned switch connection of voltage official post of the above-mentioned magnitude of voltage between above-mentioned multiple monocell, adjusts the capacity of above-mentioned monocell.
6. the control device of the battery pack according to any one in Claims 1 to 4, is characterized in that,
Also possess the Department of Communication Force carrying out with outside communicating,
Above-mentioned judging unit utilizes the information about above-mentioned battery pack received by above-mentioned Department of Communication Force, sets above-mentioned threshold value.
7. the control device of the battery pack according to any one in Claims 1 to 4, is characterized in that,
Also possesses the reporting unit exception of above-mentioned battery pack being carried out reporting.
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| JP2011264345A JP5879983B2 (en) | 2011-12-02 | 2011-12-02 | Battery control device |
| JP2011-264345 | 2011-12-02 |
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| CN103138017B true CN103138017B (en) | 2015-04-15 |
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| JP6167775B2 (en) * | 2013-09-06 | 2017-07-26 | 日産自動車株式会社 | Secondary battery control device and control method |
| CN105116277A (en) * | 2015-10-28 | 2015-12-02 | 江苏绿伟锂能有限公司 | Test mechanism for connection and disconnection of single positive electrode and single negative electrode in lithium battery pack |
| CN109661588A (en) | 2016-08-30 | 2019-04-19 | 松下知识产权经营株式会社 | Managing device and accumulating system |
| CN107870301B (en) * | 2016-09-27 | 2020-09-04 | 华为技术有限公司 | Method and device for detecting micro short circuit of battery |
| WO2019123907A1 (en) * | 2017-12-22 | 2019-06-27 | 三洋電機株式会社 | Management device and power supply system |
| EP3767785A4 (en) * | 2018-03-15 | 2021-11-03 | Hitachi Construction Machinery Co., Ltd. | Construction machinery |
| CN108387850A (en) * | 2018-05-04 | 2018-08-10 | 金卡智能集团股份有限公司 | A kind of battery detection statistical system and its method based on Internet of Things |
| CN112470326A (en) * | 2018-07-25 | 2021-03-09 | 松下知识产权经营株式会社 | Management device and power supply system |
| KR20210004646A (en) | 2019-07-05 | 2021-01-13 | 주식회사 엘지화학 | Dignosis apparatus and method of battery cell |
| CN110609188B (en) * | 2019-09-25 | 2022-07-15 | 潍柴动力股份有限公司 | Method, device and equipment for detecting aging of oil quantity metering unit |
| JP7388220B2 (en) * | 2020-02-06 | 2023-11-29 | トヨタ自動車株式会社 | Battery deterioration determination device, battery deterioration determination method, and battery deterioration determination program |
| CN111999656B (en) * | 2020-08-28 | 2023-05-12 | 广州小鹏汽车科技有限公司 | Method and device for detecting short circuit in vehicle battery and electronic equipment |
| CN114252792A (en) * | 2021-12-23 | 2022-03-29 | 蜂巢能源科技(无锡)有限公司 | Method and device for detecting internal short circuit of battery pack, electronic equipment and storage medium |
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| JP5179047B2 (en) * | 2006-11-27 | 2013-04-10 | パナソニック株式会社 | Storage device abnormality detection device, storage device abnormality detection method, and abnormality detection program thereof |
| JP5262491B2 (en) * | 2008-09-17 | 2013-08-14 | 新神戸電機株式会社 | In-vehicle lead-acid battery charge state determination device |
| WO2011036705A1 (en) * | 2009-09-24 | 2011-03-31 | トヨタ自動車株式会社 | Process for producing secondary battery |
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| JP5879983B2 (en) | 2016-03-08 |
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