CN103683377B - Power brick balancer - Google Patents
Power brick balancer Download PDFInfo
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- CN103683377B CN103683377B CN201310379182.3A CN201310379182A CN103683377B CN 103683377 B CN103683377 B CN 103683377B CN 201310379182 A CN201310379182 A CN 201310379182A CN 103683377 B CN103683377 B CN 103683377B
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- charged state
- power brick
- charge rate
- element cell
- threshold value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
A kind ofly waste few power brick balancer (10), charged state according to power brick entirety suitably performs equilibrium treatment, it is for the charge volume of each element cell of balancing battery (power brick) (103), multiple element cells (103a1-103a3) that are chargeable and electric discharge are connected in series in the cell, this power brick balancer has: charge rate detecting unit (11), and it is for detecting cell integrated total charge rate; Threshold setting unit (12), it sets different charged state threshold values according to cell integrated total charge rate; Index detecting unit (13), it is for detecting the maximum different voltage of the heterogencity of the unit charge rate (voltage) representing each element cell; And Balance route unit (14), it is for when obtaining according to the charged state threshold value of total charge rate and when confirming that maximum different voltage has been more than or equal to charged state threshold value, performing the charge rate equilibrium treatment of each element cell.
Description
Technical field
The present invention relates to power brick balancer, particularly relate to the device of the charged state equilibrium of each element cell making to be connected in series in power brick.
Background technology
As battery, exist and use the situation of power brick, power brick can by being connected in series independently element cell and provide electric current with the voltage expected to load-side.For this power brick (battery), the type often used is by adopting rechargeable unit battery, carries out recharging and can reusable type according to the reduction of charge volume (charge rate).Note, in recent years, lithium ion battery is often used as the element cell of this type cell bag.
Current, the non-homogeneous trend of the charged state of each element cell is there is in power brick when having when recharge and discharge, and as shown in Figure 8, even if when use realizes to the charging of element cell 1-3 entirety the process being full of electricity condition, still there is the non-homogeneous situation of charge rate (charge volume) C1-C3 occurring unit battery 1-3.Substantially, element cell 1 has successfully been full of electricity to charge rate C1=100%, but terminates under the state of charge rate C2, C3<100% the charging process of element cell 2 and 3, so still have also chargeable residual capacity.
In this power brick, when occurring that the charge rate C1-C3 of element cell is non-all for the moment, when the electric discharge of the element cell 3 with minimum charge rate C3 completes (charge rate R3=0%), there is in the element cell 1,2 compared with high charge rate C1, C2 the residual charge (charge rate R1, R2) still having and can discharge.When this power brick of again charging, being full of electricity condition by reaching to the surplus boost charge of each element cell 1-3, therefore, being full of electricity at the element cell 1 with maximum surplus, and when having element cell 2, the 3 underfill electricity of less surplus, charging process terminates.
Based on this reason, in power brick, add the circuit (power brick balancer) for performing equilibrium treatment to the non-homogeneous charge volume of each element cell.
As this power brick balancer, such as there is such motion (Japanese Unexamined Patent Publication 2006-246645 publication, Japanese Unexamined Patent Publication 2005-328642 publication): when the most difference between high charge rate and minimum charge rate of each element cell is more than or equal to a certain value, utilize capacitor dislocation charge, make the non-homogeneous of the charge volume of each element cell become balanced.For charge volume this non-homogeneous of each element cell, except the scheme utilizing capacitor, adopt the situation of following equilibrium treatment (Japanese Unexamined Patent Publication 2009-38876 publication) in addition: carry out current sinking by heat generating resistor conduction current.Note, usually by the voltage of detecting unit battery or calculate its charge rate etc. and check the non-homogeneous of the charge volume of each element cell.
Note, in Japanese Unexamined Patent Publication 2009-38876 publication, about reference voltage between element cell, when voltage difference as minimum voltage is more than or equal to threshold value, perform this equilibrium treatment, and at this moment, along with the charge volume of element cell tails off (along with element cell charge volume is gradually consumed), the decrease speed of charge volume will very rapidly become large, and therefore suggestion uses larger threshold value.
In this power brick balancer, if whether exceed threshold value according to the difference of charge volume between element cell (voltage or charge rate) to perform equilibrium treatment, and do not consider the charge volume of power brick entirety, so such as between unit cells be full of electricity non-homogeneous when, frequently will perform equilibrium treatment.Note, at first during fabrication by selecting to make to be full of the non-homogeneous less of electricity between this element cell, but this wastes time and energy, and repeating along with charging and discharging, this non-homogeneous have become large trend, so this is not basic solution.
In this equilibrium treatment of power brick, there will be the energy loss caused because of capacitor or heat generating resistor conduction current, and the electrical power be filled with can invalidly be consumed, therefore frequently perform the useless consumption that this equilibrium treatment can cause charging operations increase and electrical power.
More specifically, such as, as shown in Figure 9, if perform the equilibrium treatment of power brick at charge volume hour, perform the operation to power brick charging afterwards, so may there is the situation (in figure dotted portion) that element cell reaches complete charge process under the state before being full of electricity condition.As a result, there is power brick to have when still having some residue charging capacitys with regard to the problem of the feature of complete charge.
Such as, on the contrary, as shown in Figure 10, if close to the equilibrium treatment performing power brick when being full of electricity condition, then the situation (in figure dotted portion) terminating under element cell still has the state remaining charge volume to discharge may be there is.As a result, there is power brick and there is the problem just terminating the feature of discharging when still more remaining charge volumes.
But in the power brick being installed on motor vehicle, when also carrying out this equilibrium treatment to realize predetermined charge rate while being set as carrying out charging process, this can not become large problem.More specifically, such as, in the hybrid electric vehicle (HEV) that can be charged by internal combustion engine during travelling, be set as using when charge rate is about 50%, making during travelling can recharge and electric discharge, and the threshold value compared with the difference of charge volume between element cell (charge rate) is set as very large, make infrequently to perform equilibrium treatment, this is just enough.In addition, such as, in the motor vehicle (EV) not assembling internal combustion engine, can avoid frequently performing equilibrium treatment by performing equilibrium treatment when charging, thus each element cell is filled electricity when charging.
But, can in each plug-in hybrid vehicle (PHV) charged in oneself, the battery (power brick) larger than HEV capacity is installed, and can uses with the occupation mode close to motor vehicle (EV) be reduced to the level needing to charge at charge volume before.For this reason, the power brick expection be installed on PHV is in the charged state conformed to the charge frequency of user, therefore, such as when normal charging, the frequency with a small amount of electric charge is very little, and when user only charges where necessary, is in the frequency being full of electricity condition also very little.
True according to these, such as, if the specified time carrying out equilibrium treatment is fixed near 50%, so when user's frequent charge, owing to much not having the chance of a small amount of electric charge, so do not perform equilibrium treatment.In addition, if the timing setting of equilibrium treatment is being full of near electricity condition, then owing to being reluctant when user much not charge to the chance (because undercharge or charging are interrupted) being full of electricity condition when charging, so have the possibility not performing equilibrium treatment.Even if also this problem may be there is when being installed on EV.For this reason, if remove the restriction to the opportunity of carrying out equilibrium treatment, so finally equilibrium treatment can be performed continually as mentioned above.
Note, in the power brick balancer recorded in above-mentioned Japanese Unexamined Patent Publication 2009-38876 publication, using the minimum voltage of individual unit battery as benchmark, the threshold value of setting compared with the difference between element cell, so the situation that minimum voltage conforms to the charge volume of power brick entirety may be there is, and the situation of the execution timing can not optimizing equilibrium treatment may be there is.
Summary of the invention
Therefore, the object of this invention is to provide a kind ofly wastes few power brick balancer, and it suitably performs equilibrium treatment according to the charged state of power brick entirety.
According to the power brick balancer solved the problem, first form of the present invention is a kind of power brick balancer, it is for the charge volume of each element cell of balancing battery bag, in described power brick, chargeable multiple element cells with discharging are for being connected in series, described power brick balancer comprises: charged state detecting unit, and it is for detecting total charged state of described power brick entirety; Threshold setting unit, it sets different charged state threshold values according to total charged state of described power brick entirety; Index detecting unit, it is for detecting the non-homogeneous index of the heterogencity representing the unit charged state of each in described multiple element cell; And Balance route unit, it is for when obtaining according to the described charged state threshold value of described total charged state and when confirming that described non-homogeneous index has been more than or equal to described charged state threshold value, performing the equilibrium treatment of the described charge volume of each element cell of described power brick.
The second form of the present invention according to the power brick balancer solved the problem is: in the certain content of above-mentioned first form, described total charged state according to the charge volume of described power brick entirety is divided into multiple interval, and in described threshold setting unit, set the corresponding charged state threshold value in each described interval.
The third form of the present invention according to the power brick balancer solved the problem is: in the certain content of above-mentioned the second form, in described threshold setting unit, set balanced limited field, set described balanced limited field and within the scope of corresponding at least one in the border in the described interval with described total charged state, perform described equilibrium treatment for limiting described Balance route unit.
The 4th form of the present invention according to the power brick balancer solved the problem is: in the certain content of above-mentioned first form, the continually varying charged state threshold value that setting is corresponding with charged state total described in continually varying in described threshold setting unit.
The 5th form of the present invention according to the power brick balancer solved the problem is: in above-mentioned first to fourth form arbitrary form certain content in, described power brick has the function from external power source charging, and described power brick balancer is installed on motor and the internal combustion engine plug-in hybrid vehicle as power source together with described power brick.
Like this, according to above-mentioned first form of the present invention, when the non-homogeneous index of the unit charged state of each element cell is more than or equal to the charged state threshold value according to total charged state of power brick entirety, the equilibrium treatment of the charge volume of performance element battery.For this reason, when the heterogencity of the unit charged state of this element cell reach should correspond to the level of the charge volume equilibrium treatment of total charged state performance element battery of power brick entirety time, this equilibrium treatment can be performed.Therefore, the charge volume equilibrium treatment unnecessarily performing power brick can be avoided, and can prevent the electrical power to power brick is filled with from invalidly being consumed.
According to above-mentioned the second form of the present invention, can by simple process, by total charged state of power brick entirety is divided into multiple interval, and set the non-homogeneous index of the unit charged state of charged state threshold value and each element cell for each in described multiple interval, what judge the charge volume equilibrium treatment of each element cell performs timing.Therefore, can make apparatus structure simply and realize this device at an easy rate.
According to above-mentioned the third form of the present invention, the charge volume equilibrium treatment of each element cell can be limited in the scope near the border total charged state of power brick entirety being divided into multiple interval.Therefore, that the variation because of the total charged state by power brick entirety can be avoided to cause performs equilibrium treatment continuously across described interval.
According to above-mentioned 4th form of the present invention, by continuously changing charged state threshold value accordingly with total charged state of changing power brick entirety, and by this charged state threshold value compared with the non-homogeneous index of the unit charged state of each element cell, what can judge the charge volume equilibrium treatment of each element cell accurately performs timing.Therefore, the charge volume equilibrium treatment of each element cell can be performed in the best timing.
According to above-mentioned 5th form of the present invention, even in plug-in hybrid vehicle (PHV), according to user's charge frequency, the charge volume equilibrium treatment of each element cell can be performed in the best timing corresponding with total charged state of power brick.
Accompanying drawing explanation
Fig. 1 is the figure of the example illustrated when the first execution mode of battery balanced device according to the present invention being installed on motor vehicle, and this figure is the functional block diagram of the schematic overview structure that this battery balanced device is shown.
Fig. 2 is the block diagram that battery (power brick) structure is shown.
Fig. 3 is the coordinate diagram of the threshold value that the non-homogeneous level of element cell is shown, this threshold value makes to perform equilibrium treatment according to battery charge rate.
Fig. 4 is the flow chart for illustration of performing equilibrium treatment according to battery charge rate.
Fig. 5 is the figure of the example illustrated when the second execution mode of battery balanced device according to the present invention being installed on motor vehicle, this figure is the coordinate diagram of the threshold value that the non-homogeneous level of element cell is shown, this threshold value makes to perform equilibrium treatment according to battery charge rate.
Fig. 6 is the figure of the example illustrated when the 3rd execution mode of battery balanced device according to the present invention being installed on motor vehicle, this figure is the coordinate diagram of the threshold value that the non-homogeneous level of element cell is shown, this threshold value makes to perform equilibrium treatment according to battery charge rate.
Fig. 7 is the figure of the example illustrated when the 4th execution mode of battery balanced device according to the present invention being installed on motor vehicle, this figure is the coordinate diagram of the threshold value that the non-homogeneous level of element cell is shown, this threshold value makes to perform equilibrium treatment according to battery charge rate.
Fig. 8 is for illustration of charge rate of element cell each in power brick and the coordinate diagram of application thereof.
Fig. 9 is the coordinate diagram of the equilibrium treatment problem for illustration of power brick.
Figure 10 is the coordinate diagram for illustration of performing the problem of power brick equilibrium treatment in the timing being different from Fig. 9.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with accompanying drawing.Fig. 1 to Fig. 4 is the figure of the example illustrated when the first execution mode of power brick balancer according to the present invention being installed on motor vehicle.
In Fig. 1, motor vehicle 100 is constructed to hybrid electric vehicle (HEV:HybridElectric Vehicle), and it is travelled as power source by installation internal combustion engine 101 and motor 102.Internal combustion engine 101 is by providing the liquid fuels such as the gasoline be stored in not shown fuel tank and driving internal combustion engine to export the actuating force for making motor vehicle 100 travel, and motor 102 is stored in electrical power in battery 103 and drive motor exports actuating force for making motor vehicle 100 travel by providing.In addition, battery 103 plays to such as providing electrical power for vehicle mounted electric equipment 104 such as the conditioners by being adjusted to comfortable space in compartment and drive the effect of the energy of this electric equipment.Note, in this as example, internal combustion engine 101 is described as the situation using liquid fuel, certainly, this internal combustion engine also can be by gaseous fuel, as CNG(Compressed Natural Gas, and compressed natural gas), the type travelled.
When battery 103 is lower than predetermined charge rate boundary, utilize the regenerated energy produced by generator during slowing-down brake to charge to battery 103, or charged by driving internal combustion engine 101 pairs of batteries 103.
In addition, motor vehicle 100 is equipped with the power source connection circuit 105 for connecting the external power sources such as such as household electrical source, and is configured to the so-called plug-in hybrid vehicle (PHV:Plug-in HybridVehicle) that utilizes the electrical power provided from external power source to charge to battery 103.In this motor vehicle 100, such as, high capacity cell 103 is installed, can only use motor 102 to travel distance long as far as possible while suppressing internal combustion engine 101 to run.
Motor vehicle 100 is manufactured into be coordinated by control device (ECU:Electronic ControlUnit, Electronic Control Unit) 10 and to control the car-mounted devices such as such as internal combustion engine 101, motor 102, battery 103, electric equipment 104 and power source connection circuit 105.Control device 10 is constructed to make CPU (CPU:Central Processing Unit) read the control program be stored in advance in memory, and performs various control treatment according to the parameter etc. of various transducing signal, storage.Note, in the present embodiment, control device 10 is described to these car-mounted devices to concentrate as a whole coordinate and control, but when implementing on motor vehicle, certainly multiple control circuit can be suitably installed, make these control circuits carry out decentralized control.
Now, as shown in Figure 2, such as, the battery 103 of motor vehicle 100 is constructed to by being connected in series multiple element cell 103a1-103a3(as an example, shown in Fig. 2 three) power brick of electrical power is provided to such as motor 102 and electric equipment 104 even load EL with the output voltage expected.Each element cell 103a1-103a3 of battery 103 is coordinated and is controlled by the battery management system 20 comprising control device 10.At this, in the present embodiment, as an example, battery 103 is described as the cell bag being configured to provide electrical power to the entirety of car-mounted device, but be not limited to this, multiple power brick can also be installed on vehicle dispersedly, as long as apply present embodiment as required.
More specifically, battery management system 20 is constructed by voltage detecting circuit 21 and equilibrium treatment circuit 22 are connected to control device 10, and when control device 10 is by performing above-mentioned control program using memory as service area, battery management system 20 plays the effect of charge rate detecting unit 11, threshold setting unit 12, index detecting unit 13 and Balance route unit 14.Like this, control device 10 detects overall and each element cell 103a1-103a3 charge rate separately (charged state) of battery (power brick) 103 according to the detection voltage of voltage detecting circuit 21, and makes equilibrium treatment circuit 22 perform regulable control for making the charged state equilibrium of each in these element cells 103a1-103a3.
Voltage between voltage detecting circuit 21 connects into and can to detect as the positive and negative terminals of battery 103 entirety of power brick, the voltage between the positive and negative terminals that also can detect each element cell 103a1-103a3.
Equilibrium treatment circuit 22 adopts the circuit structure of the regulable control for performing the voltage between terminals equilibrium making each element cell 103a1-103a3.Such as, be configured to can be balanced or by making the charge-conduction compared to other element cell surpluses to heat generating resistor and consume these electric charges to make charge volume balanced by utilizing capacitor to make the storage in each element cell 103a1-103a3 fill the quantity of electric charge for equilibrium treatment circuit 22.Note, for this equilibrium treatment, as long as suitably select capacitor schemes or heat generating resistor scheme according to the cost of this circuit of structure, the cost etc. of storage electric charge.
Charge rate detecting unit 11 detects (understanding) respective charge rate (unit charged state) according to the voltage between the positive and negative terminals of each element cell 103a1-103a3 detected by voltage detecting circuit 21, and detects the charge rate (total charged state) of battery 103 entirety according to the voltage between the positive and negative terminals of element cell 103a1 and 103a3.
In threshold setting unit 12, make the charged state threshold value of the balanced regulable control of the charge rate (charged state) of each element cell 103a1-103a3 of battery 103 store and remain in memory by being used for judging whether to perform, and set charged state threshold value according to the charge rate of battery 103 entirety.Such as, as shown in Figure 3, in threshold setting unit 12, the charge rate of battery 103 entirety is divided into multiple interval, and correspondingly sets corresponding charged state threshold value for each in these intervals.Such as, setting higher charged state threshold value V2 for being more than or equal to 25% to the charge rate being less than 65%, setting lower charged state threshold value V1 for being more than or equal to 65% to the charge rate being less than 100%.In addition, by setting to the charge rate being less than 25% grade the charged state threshold value V0 exceeding the voltage between terminals of element cell for being more than or equal to 0%, this interval is set as in the control treatment be described below, forbid that (avoiding) performs the balanced limit section of equilibrium treatment.
Index detecting unit 13 calculates the difference (voltage difference) of the unit charge rate of each element cell 103a1-103a3 of the battery 103 detected by charge rate detecting unit 11, and is detected. as the index representing heterogencity between each element cell 103a1-103a3.
Charged state threshold value corresponding with the charge rate of battery 103 entirety that charge rate detecting unit 11 detects in Balance route unit 14 read threshold setup unit (memory) 12, and when the maximum difference of the unit charge rate between each element cell 103a1-103a3 that index detecting unit 13 detects (non-homogeneous index) is more than or equal to this charged state threshold value, equilibrium treatment circuit 22 performs for making the equilibrium treatment (regulable control) that the charge rate (voltage between terminals) of each element cell 103a1-103a3 is balanced.
Particularly, control device 10 suitably performs the regulable control of each element cell 103a1-103a3 charge rate equilibrium separately for making battery 103 by the control treatment (method) shown in flow chart performing Fig. 4.
First, when the igniter of motor vehicle is switched on, control device 10(battery management system 20) detect the voltage between terminals (step S11) of the overall and each element cell 103a1-103a3 of battery 103, and deduct minimum voltage by the maximum voltage of the detection voltage by these element cells 103a1-103a3 and calculate maximum voltage difference (step S12).
In addition, (detection) charge rate (step S13) is understood from the voltage of battery 103 entirety comparatively early detected, and correspondingly set charged state threshold value (step S14) according to the charge rate detected, afterwards, check whether the maximum voltage difference calculated is more than or equal to the charged state threshold value (step S15) of setting.
Afterwards, when the maximum voltage difference calculated is less than the charged state threshold value of setting, do not carry out any operation, get back to step S11, and repeat similar process, or when the maximum voltage difference calculated is more than or equal to the charged state threshold value of setting, perform for making the process (step S16) that the charge rate (voltage between terminals) of each element cell 103a1-103a3 is balanced, get back to step S11 afterwards, and repeat similar process.
Therefore, when the charge rate of battery 103 entirety is close to when being full of electricity condition, even if when appearing at the non-homogeneous level causing small voltage difference V1 between element cell 103a1-103a3 under this charge rate, the process of the charge rate equilibrium for making these element cells 103a1-103a3 also can be performed.In addition, after the charge rate of battery 103 entirety is approximately half, even if there is non-all a period of time of voltage difference V1 level, also again do not repeat this equilibrium treatment.
In addition, when the charge rate of battery 103 entirety is approximately a half, when appearing at the non-homogeneous level causing large voltage difference V2 between element cell 103a1-103a3 under this charge rate, the process of the charge rate equilibrium for making these element cells 103a1-103a3 can be performed, thus when wanting recharge when not realizing being full of electricity condition, frequently can not perform equilibrium treatment, but perform as required.
In addition, when the charge rate of battery 103 entirety is close to sky, the process of the charge rate equilibrium performed for making element cell 103a1-103a3 can even be avoided.
Like this, in the present embodiment, the large threshold value of picture setting can be avoided, make the situation only just performing equilibrium treatment when heterogencity is very large such, user occur between element cell 103a1-103a3 when often charging and do not perform equilibrium treatment large charge rate non-homogeneous perform charging process, and the situation of the charging capacity that effectively can not utilize each element cell 103a1-103a3 can be prevented.
In addition, the little threshold value of picture setting can be prevented, make the charge rate when battery 103 entirety be approximately a half, even if heterogencity is little, the situation of also carrying out equilibrium treatment is such, and by indistinguishably, (unnecessarily) performs equilibrium treatment and invalidly consume the situation of the electrical power of storage.
In addition, can prevent because the charge rate in battery 103 entirety making the charge volume stored under the element cell 103a1-103a3 with non-homogeneous charge storage feature is full of electricity condition occur difference close to performing equilibrium treatment time empty, effectively can not utilize the situation of charging capacity.
Therefore, charge volume equilibrium treatment can be performed for each element cell 103a1-103a3, make to use within the scope of no problem charging feature, and the impact of the charge frequency of the user of such as plug-in hybrid vehicle (PHV) can not be subject to.
Next, Fig. 5 is the figure that the example the second execution mode of battery balanced device according to the present invention being installed on the situation of motor vehicle is shown.At this, because the configuration of present embodiment is roughly similar to above-mentioned execution mode, so below by transfer accompanying drawing, represent that similar structure carrys out Expressive Features part (other execution modes described below are also similar) with identical Reference numeral.
As shown in Figure 5, in threshold setting unit 12, the charge rate of battery 103 entirety is divided into more more than above-mentioned execution mode interval (multistage), and sets corresponding charged state threshold value for each in these intervals.Such as, higher charged state threshold value V3 is set to the charge rate being less than 50% for being more than or equal to 25%, set medium charged state threshold value V2 for being more than or equal to 50% to the charge rate being less than 80%, and correspondingly set lower charged state threshold value V1 for being more than or equal to 80% to the charge rate being less than 100%.
Therefore, by more compactly dividing the charge rate of battery 103 entirety, can equilibrium treatment more rightly between performance element battery 103a1-103a3.Note, in the present embodiment, as an example, situation about setting is carried out in the interval described for three phases, but is not limited to this, certainly can be divided into more than four-stage.
Like this, in the present embodiment, except the effect of above-mentioned execution mode, the use to it can also set according to the charge volume of battery 103 entirety and user, thus at desirable time pin, charge volume equilibrium treatment be performed to each element cell 103a1-103a3.
Next, Fig. 6 illustrates that the 3rd execution mode by battery balanced device according to the present invention is installed on the figure of an example of the situation of motor vehicle.
As shown in Figure 6, in threshold setting unit 12, correspondingly set the charged state threshold value compared with the maximum voltage difference between the charge rate of battery 103 entirety and battery 103a1-103a3 by level and smooth continuous print continuous lines (straight line or curve).Such as, be set as making along with close to 25% charge rate, charged state threshold value close to higher charged state threshold value V2, and along with close to 100% charge rate, charged state threshold value is close to less charged state threshold value V1.
Therefore, by utilizing according to the charged state threshold determination corresponding with the non-homogeneous level between element cell 103a1-103a3 of the charge rate of battery 103 entirety the need of equilibrium treatment, can more suitably perform.
Like this, in the present embodiment, except the effect of above-mentioned execution mode, the use to it can set according to the charge volume of battery 103 entirety and user, thus at more preferably time pin, charge volume equilibrium treatment be performed to each element cell 103a1-103a3.
Next, Fig. 7 illustrates that the 4th execution mode by battery balanced device according to the present invention is installed on the figure of an example of the situation of motor vehicle.
As shown in Figure 7, in threshold setting unit 12, the charge rate of battery 103 entirety is divided into more more than above-mentioned execution mode interval (multistage), and sets corresponding charged state threshold value for each in these intervals.Such as, set higher charged state threshold value V2 for being more than or equal to 25% to the charge rate being less than 50%, and correspondingly set lower charged state threshold value V1 for being more than or equal to 65% to the charge rate being less than 100%.In addition, by setting to the charge rate being less than 65% grade the charged state threshold value V0 exceeding the voltage between terminals of element cell for being more than or equal to 50%, this interval is set as forbid that (restriction) performs the balanced limit section of equilibrium treatment.
Therefore, by more compactly dividing the charge rate of battery 103 entirety, can equilibrium treatment more suitably between performance element battery 103a1-103a3, and can avoid at every turn when exceeding or do not exceed (across) charge rate of 50% or 65% perform equilibrium treatment.Note, in the present embodiment, as an example, describe the situation limiting equilibrium treatment within the scope of the charge rate of 50% to 65%, but be not limited to this, such as, suitably can be set by 50% to 55% grade that limited field is narrowed to.
Like this, in the present embodiment, except the effect of above-mentioned execution mode, can also avoid unnecessarily repeating the charge volume equilibrium treatment for each element cell 103a1-103a3, and can prevent the electrical power stored in battery 103 from invalidly being consumed.
At this, in the above-described embodiment, as an example, charge rate is described as the index of the charged state for representing battery 103, but being not limited to this, such as, heterogencity can being assessed by directly using voltage between terminals, or from being supplied to the electric charge of battery 103 to understand charge volume, instead of charge rate can be detected according to voltage between terminals.
In addition, as an example, the charge rate describing the element cell forming the battery that motor vehicle is installed is balanced, but is not limited to this, as long as battery is connected in series by element cell and forms, just can suitably apply.
Scope of the present invention is not limited to shown in accompanying drawing with described exemplary embodiment, but also comprises all execution modes that can bring with effect effects equivalent of the present invention.In addition, scope of the present invention is not limited to the combination of the feature of the present invention that each claim is specified, but can be specified by any desired combination of special characteristic in all disclosed each features.
Although be described embodiments of the present invention, the present invention is not limited to above-mentioned execution mode, and can with various multi-form enforcement the present invention within the scope of technological thought of the present invention, and this is natural.
This application claims the priority of No. 2012-204763, the Japanese patent application that on September 18th, 2012 submits to, the full content of this application is incorporated to herein by reference.
Claims (4)
1. a power brick balancer, it is for the charge volume of each element cell of balancing battery bag, and in described power brick, chargeable multiple element cells with discharging are for being connected in series, and described power brick balancer comprises:
Charged state detecting unit, it is for detecting total charged state of described power brick entirety;
Threshold setting unit, it sets different charged state threshold values according to total charged state of described power brick entirety;
Index detecting unit, it is for detecting the non-homogeneous index of the heterogencity representing the unit charged state of each in described multiple element cell; And
Balance route unit, it is for when to obtain according to the described charged state threshold value of described total charged state and when confirming that described non-homogeneous index has been more than or equal to described charged state threshold value, perform the equilibrium treatment of the described charge volume of each element cell of described power brick
Wherein, the described total charged state according to the charge volume of described power brick entirety is divided into multiple interval, and in described threshold setting unit, set the corresponding charged state threshold value in each described interval.
2. power brick balancer according to claim 1, wherein, in described threshold setting unit, set balanced limited field, set described balanced limited field and within the scope of corresponding at least one in the border in the described interval with described total charged state, perform described equilibrium treatment for limiting described Balance route unit.
3. power brick balancer according to claim 1, wherein, the continually varying charged state threshold value that setting is corresponding with charged state total described in continually varying in described threshold setting unit.
4. the power brick balancer according to any one of claim 1-3, wherein, described power brick has the function from external power source charging, and
Described power brick balancer is installed on motor and the internal combustion engine plug-in hybrid vehicle as power source together with described power brick.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-204763 | 2012-09-18 | ||
| JP2012204763A JP2014060868A (en) | 2012-09-18 | 2012-09-18 | Battery pack equalization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014060868A (en) | 2012-09-18 | 2014-04-03 | Suzuki Motor Corp | Battery pack equalization device |
| JP6201919B2 (en) * | 2014-07-10 | 2017-09-27 | 住友電気工業株式会社 | Battery pack and storage battery system |
| KR102475482B1 (en) | 2015-11-18 | 2022-12-09 | 삼성전자주식회사 | Method and apparatus of controlling battery, and battery pack enabling the method |
| DE102017201622A1 (en) | 2017-02-01 | 2018-08-02 | Bayerische Motoren Werke Aktiengesellschaft | Method for operating an energy storage system and energy storage system |
| CN106887086B (en) * | 2017-04-07 | 2022-10-21 | 上海蔚来汽车有限公司 | Mobile charging equipment, mobile charging system and mobile charging method |
| CN109599903A (en) * | 2017-09-30 | 2019-04-09 | 加百裕工业股份有限公司 | Battery equilibrium management method |
| CN107696898B (en) * | 2017-10-17 | 2019-11-29 | 北京普莱德新能源电池科技有限公司 | A kind of electrokinetic cell system and electric vehicle using charging complete equilibrium |
| JP7111642B2 (en) * | 2019-03-15 | 2022-08-02 | ビークルエナジージャパン株式会社 | battery controller |
| CN110600819B (en) * | 2019-09-19 | 2022-08-05 | 上海电气国轩新能源科技有限公司 | Electric quantity balance control system and method of battery system |
| CN110515006A (en) * | 2019-10-09 | 2019-11-29 | 山东元齐新动力科技有限公司 | A kind of battery pack, the management method of battery pack and vehicle |
| CN112737049B (en) * | 2021-01-04 | 2023-04-14 | 珠海格力电器股份有限公司 | Battery equalization control method and device and battery module |
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| JP2014060868A (en) | 2012-09-18 | 2014-04-03 | Suzuki Motor Corp | Battery pack equalization device |
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| CN101976876A (en) * | 2010-11-18 | 2011-02-16 | 无锡东海新能源科技有限公司 | Device and method for equalizing batteries in charging process |
| CN102074991A (en) * | 2011-01-24 | 2011-05-25 | 启明信息技术股份有限公司 | Method and device for full balance control of power battery of electric automobile |
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| CN103683377A (en) | 2014-03-26 |
| DE102013217767A1 (en) | 2014-03-20 |
| JP2014060868A (en) | 2014-04-03 |
| DE102013217767B4 (en) | 2022-02-03 |
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