CN202695664U - Battery equalization device and stack equalization device - Google Patents
Battery equalization device and stack equalization device Download PDFInfo
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- CN202695664U CN202695664U CN2012202576252U CN201220257625U CN202695664U CN 202695664 U CN202695664 U CN 202695664U CN 2012202576252 U CN2012202576252 U CN 2012202576252U CN 201220257625 U CN201220257625 U CN 201220257625U CN 202695664 U CN202695664 U CN 202695664U
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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
Disclosed are a battery equalization device and a stack equalization device. According to the utility model discloses a battery balancing unit of embodiment includes: a battery pack having an anode and a cathode, comprising N cells connected in series, wherein each cell has an anode and a cathode, N is an integer greater than 1; an inductor having a first terminal and a second terminal; a first rectifier switch coupled between an anode of the battery pack and a first end of the inductor; a second rectifier switch coupled between a cathode of the battery pack and the first end of the inductor; a third rectifier switch coupled between an anode of the battery pack and the second end of the inductor; a fourth rectifier switch coupled between the cathode of the battery pack and the second end of the inductor; and N +1 controlled switches, wherein the anode and the cathode of each battery unit are respectively coupled to two ends of the inductor through the controlled switches.
Description
Technical field
Embodiment of the present utility model relates to electronic-circuit device, is not battery balanced device and the stacking balancer that exclusively relates to for the balancing battery unit still more specifically.
Background technology
In recent years, increasing product adopts the battery pack that is in series by battery unit as main power source.Since each battery unit at capacity, discharge and recharge, the difference of the aspects such as internal impedance and temperature characterisitic, can cause unbalanced between the battery unit.This unbalanced phenomena is so that the capacity of whole battery pack reduces, the lost of life or internal resistance are excessive.Therefore, balancer is used with regulating cell electric weight (voltage), and then guarantees safety and stability.
Disclosed utility model patent on June 29th, 2011 " Novel battery equalizing circuit and control method thereof " (publication number: CN102111003A) disclose a kind of battery balanced device.Active equalization circuit in the conventional art, the technical scheme that this application proposes have improved the efficient that energy shifts.But the device that this technical scheme adopts is too complicated, so that the cost of battery balanced device is high.
The utility model content
Consider one or more problem of the prior art, the utility model provides a kind of battery balanced device, comprising: battery pack, have anode and negative electrode, comprise the battery unit of N series connection, wherein each battery unit all has anode and negative electrode, and N is the integer greater than 1; Inductance has first end and the second end; The first rectifier switch is coupled between the first end of the anode of described battery pack and described inductance; The second rectifier switch is coupled between the first end of the negative electrode of described battery pack and described inductance; The 3rd rectifier switch is coupled between the second end of the anode of described battery pack and described inductance; The 4th rectifier switch is coupled between the second end of the negative electrode of described battery pack and described inductance; And N+1 controlled switch, wherein the anode of each battery unit and negative electrode all are coupled to respectively the two ends of described inductance by controlled switch.
According to an embodiment of the present utility model, described battery pack comprised electric battery unit, wherein, in very first time section, be coupled to the controlled switch conducting of the electric battery unit negative electrode and positive electrode of described mistake, the electric battery unit of described mistake is to described induction charging, and the electric current of described inductance increases; In the second time period, the controlled switch that is coupled to the electric battery unit negative electrode and positive electrode of described mistake turn-offs, and to described batteries charging, the electric current of described inductance reduces described inductance by corresponding rectifier switch.
According to an embodiment of the present utility model, described first to fourth rectifier switch is diode.
According to an embodiment of the present utility model, described battery pack comprises owes electric battery unit, it is characterized in that, in very first time section, to described induction charging, the electric current of described inductance increases described battery pack by corresponding rectifier switch; In the second time period, corresponding rectifier switch turn-offs, and is coupled to described controlled switch conducting of owing electric battery unit negative electrode and positive electrode, and described inductance is owed electric battery unit charging to described, and the electric current of described inductance reduces.
The utility model also provides a kind of battery balanced device, comprising: a kind of battery balanced device, and described battery balanced device comprises: battery pack, comprise N battery unit of connecting, wherein each battery unit all has anode and negative electrode, and N is the integer greater than 1; Inductance has first end and the second end; The first rectifier switch is coupled between the first end of the anode of a voltage source and described inductance; The second rectifier switch is coupled between the first end of the negative electrode of described voltage source and described inductance; The 3rd rectifier switch is coupled between the second end of the anode of described voltage source and described inductance; The 4th rectifier switch is coupled between the second end of the negative electrode of described voltage source and described inductance; N+1 controlled switch, wherein the anode of each battery unit and negative electrode all are coupled to respectively the two ends of described inductance by controlled switch.
According to an embodiment of the present utility model, described battery pack comprises owes electric battery unit, it is characterized in that, in very first time section, to described induction charging, the electric current of described inductance increases described voltage source by corresponding rectifier switch; In the second time period, corresponding rectifier switch turn-offs, and is coupled to described controlled switch conducting of owing electric battery unit negative electrode and positive electrode, and described inductance is owed electric battery unit charging to described, and the electric current of described inductance reduces.
According to an embodiment of the present utility model, at least one controlled switch comprises the MOS device of the same type of two series connection.
The utility model also provides a kind of stacking balancer, comprise the battery balanced device group, have anode and negative electrode, comprise the battery balanced device of M series connection, wherein each battery balanced device includes battery pack and has anode and negative electrode, and M is the integer greater than 1; Stacking inductance has first end and the second end; The first stacking rectifier switch is coupled between the first end of the anode of described battery balanced device group and described stacking inductance; The second stacking rectifier switch is coupled between the second end of the negative electrode of battery balanced device group and described stacking inductance; The 3rd stacking rectifier switch is coupled between the first end of the anode of described battery balanced device group and described stacking inductance; The 4th stacking rectifier switch is coupled between the second end of the negative electrode of described battery balanced device group and described stacking inductance; M+1 stacking controlled switch, wherein the anode of each battery balanced device and negative electrode all are coupled to respectively the two ends of described stacking inductance by stacking controlled switch.
According to an embodiment of the present utility model, at least one described battery balanced device comprises above-mentioned battery balanced device.
According to an embodiment of the present utility model, it is characterized in that in very first time section, described battery balanced device carries out equilibrium to the battery unit that its battery pack comprises; In the second time period, described stacking balancer carries out equilibrium to battery pack; In the 3rd time period, described battery balanced device carries out equilibrium to the battery unit that its battery pack comprises.
Description of drawings
Describe below with reference to the accompanying drawings embodiment of the present utility model in detail, wherein identical Reference numeral represents identical parts or feature.
Fig. 1 illustrates the circuit theory diagrams according to the battery balanced device 100 of an embodiment of the utility model;
Fig. 2 illustrates the circuit theory diagrams according to the battery balanced device 200 of an embodiment of the utility model;
The difference that Fig. 3 A ~ 3C illustrates battery pack forms structure;
Fig. 4 illustrates the circuit theory diagrams according to the battery balanced device 400 of an embodiment of the utility model;
Fig. 5 A ~ 5D illustrates and crosses the fundamental diagram that electric battery unit is transferred to energy battery pack in the battery balanced device 100;
Fig. 6 illustrates the circuit theory diagrams according to the battery balanced device 600 of an embodiment of the utility model;
Fig. 7 A ~ 7D illustrates that battery pack is transferred to energy the fundamental diagram of owing electric battery unit in the battery balanced device 100;
Fig. 8 A ~ 8B illustrates in the battery balanced device 100 and to cross electric battery unit and energy is transferred to the fundamental diagram of owing electric battery unit;
Fig. 9 illustrates the circuit theory diagrams according to the battery balanced device 900 of an embodiment of the utility model;
Figure 10 A ~ 10B illustrates that voltage source is transferred to energy the fundamental diagram of owing electric battery unit in the battery balanced device 900;
Figure 11 A ~ 11C illustrates according to the battery balanced device 1100 of an embodiment of the utility model, 1101 and 1102 circuit theory diagrams;
Figure 12 illustrates the circuit theory diagrams according to the cell stacks balancer 1200 of an embodiment of the utility model;
Figure 13 illustrates the circuit theory diagrams according to the cell stacks balancer 1300 of an embodiment of the utility model.
Embodiment
Described specific embodiment represents exemplary embodiment of the present utility model hereinafter, and only unrestricted for the example explanation in essence.In the following description, in order to provide thorough understanding of the present utility model, a large amount of specific detail have been set forth.Yet it is evident that for those of ordinary skills: these specific detail are optional for the utility model.In other examples, for fear of obscuring the utility model, do not specifically describe known circuit, material or method.
In specification, mention that " embodiment " or " embodiment " mean in conjunction with the described special characteristic of this embodiment, structure or characteristic to be included among at least one embodiment of the present utility model.Term " in one embodiment " each position in specification occurs all not relating to identical embodiment, neither mutually get rid of other embodiment or variable embodiment.Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.In addition, it should be understood by one skilled in the art that at this diagram that provides all be for illustrative purposes, and diagram is drawn in proportion not necessarily.Should be appreciated that when claiming " element " " to be connected to " or " coupling " during to another element it can be directly to connect or be couple to another element or can have intermediary element.On the contrary, when claiming element " to be directly connected to " or during " being directly coupled to " another element, not having intermediary element.The identical identical element of Reference numeral indication.Term used herein " and/or " comprise any and all combinations of one or more relevant projects of listing.
Fig. 1 illustrates the circuit theory diagrams according to the battery balanced device 100 of an embodiment of the utility model.Battery balanced device 100 comprises battery pack 101, rectifier switch R1 ~ R4, inductance L and controlled switch S
1~ S
N+1Battery pack 101 comprises the battery unit C of series connection
1~ C
NBattery pack 101 has anode 102 and negative electrode 103, and the points of common connection 104 that is connected to form of a plurality of adjacent cell.Inductance L has two ends, first end P
1With the second end P
2The first rectifier switch R
1Be coupled to the anode 102 of battery pack 101 and the first end P of inductance L
1Between.The second rectifier switch R
2Be coupled to the negative electrode 103 of battery pack 101 and the first end P of inductance L
1Between.The 3rd rectifier switch R
3Be coupled to the anode 102 of battery pack 101 and the second end P of inductance L
2Between.The 4th rectifier switch R
4Be coupled to the negative electrode 103 of battery pack 101 and the second end P of inductance L
2Between.N+1 controlled switch S
1~ S
N+1An end (the first end P that is coupled to respectively inductance L in order to anode and negative electrode with each battery unit
1Perhaps the second end P
2) and an other end (the second end P
2Perhaps first end P
1), comprise the controlled switch S of the anode 102 that is coupled to battery pack 101
1, be coupled to the controlled switch S of points of common connection 104
2~ S
N, and the controlled switch S that is coupled to the negative electrode 103 of battery pack 101
N+1
Each battery unit has anode and negative electrode, in the embodiment shown in fig. 1, and battery unit C
1Anode also be the anode 102 of battery pack 101 simultaneously, battery unit C
NNegative electrode also be the negative electrode 103 of battery pack 101 simultaneously.The anode of each battery unit and negative electrode all are coupled to respectively the two ends of inductance L by controlled switch.For example, battery unit C
1Anode and negative electrode respectively by controlled switch S
1And S
2Be coupled to the second end P of inductance L
2With first end P
1, battery unit C
2Anode and negative electrode respectively by controlled switch S
2And S
3Be coupled to the first end P of inductance L
1With the second end P
2
In one embodiment, the negative electrode of battery balanced device is coupled to earth potential.In other embodiment, the negative electrode of battery balanced device can also be coupled to positive supply or negative supply, forms the battery balanced device 400 shown in 4.Power supply VF shown in Figure 40 0 can be provided by battery unit or battery pack, also can be provided by switch converters or linear voltage regulator etc.
In the following description, the battery unit that will need to reduce energy (electric weight or capacity) was called electric battery unit, cause battery unit excessively the reason of electricity comprise that battery capacity is too high, overcharge, the reason such as few discharge.The battery unit that needs are increased energy is called owes electric battery unit, cause that the reason of owing electric battery unit comprises that battery capacity is excessively low, charging less, the reason such as discharge is many.
Battery unit is carried out balanced method to be had multiplely, comprises that the energy that will cross electric battery unit is transferred to battery pack, the energy of battery pack is transferred to owes electric battery unit, and the energy that perhaps will cross electric battery unit is transferred to owes electric battery unit.
According to the application's a embodiment, cross electric battery unit and by inductance L battery pack 101 is charged, energy is transferred to battery pack 101.Suppose battery unit C
-1For crossing electric battery unit, C
1Energy will be transferred to battery pack 101.Fig. 5 A and 5B showed electric battery unit C
1Energy is transferred to the process of battery pack 101.Shown in Fig. 5 A, in very first time section, be coupled to electric battery unit C
1The controlled switch S of negative electrode and positive electrode
2And S
1Electric battery unit C is crossed in conducting
1To inductance L charging, inductive current I
LIncrease.Shown in Fig. 5 B, in the second time period, controlled switch S
2And S
1Turn-off rectifier switch R
1And R
4Conducting, inductive current I
LTo battery pack 101 chargings, inductive current I
LReduce.Because inductive current I
LCan not suddenly change, should select rectifier switch R for this reason
1And R
4The path that forms is to batteries charging, and do not select rectifier switch R
2And R
3The path that forms.
Inductive current I
LThe speed and the battery unit C that rise
1Voltage relevant (being directly proportional), inductive current I
LThe speed that reduces is relevant with the voltage of whole battery pack 101.Because the voltage of battery pack 101 is higher than battery unit C
1Voltage, inductive current I
LThe speed that reduces is higher than the speed of rising, inductive current I
LBecome easily negative value.For this reason, in some applications, as inductive current I
LDrop to zero, by turn-offing (disconnection) rectifier switch R
1And R
4Prevent inductive current I
LBecome negative.That is, also comprised for the 3rd time period, in the 3rd time period, rectifier switch R
1~ R
4Disconnect inductive current I
LRemain zero.It is pointed out that the restriction owing to the circuit precision, zero is an approximation, generally between positive and negative hundreds of milliamperes.
Suppose battery unit C
2For crossing electric battery unit, battery unit C
2Energy will be transferred to battery pack 101.Fig. 5 C and 5D showed electric battery unit C
2Energy is transferred to the process of battery pack 101.Shown in Fig. 5 C, in very first time section, be coupled to electric battery unit C
2The controlled switch S of negative electrode and positive electrode
3And S
2Electric battery unit C is crossed in conducting
2To inductance L charging, inductive current I
LIncrease.Shown in Fig. 5 D, in the second time period, controlled switch S
3And S
2Turn-off rectifier switch R
2And R
3Conducting, inductive current I
LTo battery pack 101 chargings, inductive current I
LReduce.Because inductive current I
LCan not suddenly change, should select rectifier switch R for this reason
3And R
2The path that forms is to batteries charging, and do not select rectifier switch R
4And R
1The path that forms.
Equally, in some applications, as inductive current I
LDrop to after zero, by turn-offing rectifier switch R
2And R
3Prevent inductive current I
LBecome negative.That is, also comprised for the 3rd time period, in the 3rd time period, rectifier switch R
1~ R
4Disconnect inductive current I
LBe zero.
Equally, can adopt said method or step to shift other energy of crossing battery unit to battery pack 101.
It should be noted that controlled switch as herein described and rectifier switch are the convenience in order to explain, according to its link position and or function and or the division done of the form of expression, do not represent the difference that exists between these switches physically.Here " rectification " and " controlled " is differentiation nominally, do not represent must have some function on its function or must not have some function, also do not represent it and necessarily is subjected to external force control or controlled by external force.For example, rectifier switch can not be interpreted as must have or can only have rectification function, and rectifier switch also is controlled switch in certain embodiments.Controlled switch is not certain yet or can only be controlled, can use the device that some can oneself's control, can use some device with rectification function (such as diode) to realize yet.In certain embodiments, controlled switch can be realized according to the variation of electric current automatic switch behind the employing diode, thereby need not external force control (for example by controlling the grid control switch of MOS device).
In one embodiment, rectifier switch R
1~ R
4Diode, such as Schottky diode, as shown in Figure 6.Fig. 6 illustrates the circuit theory diagrams according to the battery balanced device 600 of an embodiment of the utility model, wherein uses diode D
1~ D
4Realize respectively rectifier switch R
1~ R
4Diode D
1And D
3Negative electrode be coupled to the anode 102 of battery pack 101, diode D
2And D
4Anode be coupled to the negative electrode 103 of battery pack 101.Behind diode realization rectifier switch, for the energy transfer process shown in Fig. 5 B, in the second time period, controlled switch S
2And S
1Have no progeny in the pass, because inductive current I
LCan not suddenly change electric current I
LWill automatically select diode D
1And D
4(corresponding R
1And R
4) path that forms is to battery pack 101 chargings.Equally, as inductive current I
LDrop to zero, diode D
1, D
4Can automatically shut down.
According to the application's a embodiment, battery pack 101, is transferred to energy and owes electric battery unit owing electric battery unit charging by inductance L.Suppose battery unit C
1For owing electric battery unit, the energy of battery pack 101 will be transferred to battery unit C
1Fig. 7 A and 7B illustrate battery pack 101 and energy is transferred to owes electric battery unit C
1Fundamental diagram.Shown in Fig. 7 A, in very first time section, rectifier switch R
1And R
4Conducting, 101 pairs of inductance L chargings of battery pack, inductive current I
LIncrease.Shown in Fig. 7 B, in the second time period, rectifier switch R
1And R
4Turn-off, be coupled to and owe electric battery unit C
1The controlled switch S of negative electrode and positive electrode
2And S
1Conducting, inductive current I
LTo owing electric battery unit C
1Charging, inductive current I
LReduce.Because inductive current I
LCan not suddenly change, should select rectifier switch R for this reason
1And R
4The path that forms charges to inductance L, and does not select rectifier switch R
2And R
3The path that forms.
In some applications, as inductive current I
LDrop to zero, by turn-offing rectifier switch R
1And R
4Prevent inductive current I
LBecome negative.That is, also comprised for the 3rd time period, in the 3rd time period, rectifier switch R
1~ R
4Disconnect inductive current I
LBe zero.
Suppose battery unit C
2For owing electric battery unit, the energy of battery pack will be transferred to C
2Fig. 7 C and 7D show battery pack 101 and energy is transferred to owes electric battery unit C
2Process.Shown in Fig. 7 C, in very first time section, rectifier switch R
2And R
3Conducting, 101 pairs of inductance L chargings of battery pack, inductive current I
LIncrease.Shown in Fig. 7 D, in the second time period, rectifier switch R
2And R
3Turn-off, be coupled to electric battery unit C
2The controlled switch S of negative electrode and positive electrode
3And S
2Conducting, inductive current I
LTo crossing electric battery unit C
2Charging, inductive current I
LReduce.Because inductive current I
LCan not suddenly change, should select rectifier switch R for this reason
2And R
3The path that forms charges to inductance L, and does not select rectifier switch R
1And R
4The path that forms.
Equally, in some applications, as inductive current I
LDrop to zero, by turn-offing rectifier switch R
2And R
3Prevent inductive current I
LBecome negative.That is, also comprised for the 3rd time period, in the 3rd time period, rectifier switch R
1~ R
4Disconnect inductive current I
LBe zero.
The energy that can adopt above-mentioned steps to shift battery pack 101 is owed electric battery unit to other.
In actual applications, battery pack 101 may comprise simultaneously electric battery unit and owe electric battery unit, for this reason, according to the application's a embodiment, crossed electric battery unit and charged to owing electric battery unit by inductance L, energy is transferred to owes electric battery unit.Power conversion between the battery unit is more direct and fast, has also improved conversion efficiency.Suppose battery unit C
1For crossing electric battery unit, C
2For owing electric battery unit, C
1Energy will be transferred to battery unit C
2Shown in Fig. 8 A, in very first time section, be coupled to electric battery unit C
1The controlled switch S of negative electrode and positive electrode
2And S
1Electric battery unit C is crossed in conducting
1To inductance L charging, inductive current I
LIncrease.Shown in Fig. 8 B, in the second time period, controlled switch S
1Turn-off, be coupled to and owe electric battery unit C
2The controlled switch S of negative electrode and positive electrode
3And S
2Conducting, inductance L is to owing electric battery unit C
2Charging, inductive current I
LReduce.
Fig. 9 illustrates the circuit theory diagrams according to the battery balanced device 900 of an embodiment of the utility model, and battery balanced device 900 is coupled to voltage source V 1, and wherein voltage source V 1 has anode and negative electrode.Battery balanced device 900 comprises battery pack 101, rectifier switch R1 ~ R4, inductance L and controlled switch S
1~ S
N+1Battery pack 101 comprises the battery unit C of series connection
1~ C
NBattery pack 101 has anode 102 and negative electrode 103, and the points of common connection 104 that is connected to form of a plurality of adjacent cell.Inductance L has first end P
1With the second end P
2The first rectifier switch R
1Be coupled to the anode 905 of voltage source V 1 and the first end P of inductance L
1Between.The second rectifier switch R
2Be coupled to the negative electrode 906 of voltage source V 1 and the first end P of inductance L
1Between.The 3rd rectifier switch R
3Be coupled to the anode 905 of piezoelectric voltage source V1 and the second end P of inductance L
2Between.The 4th rectifier switch R
4Be coupled to the negative electrode 906 of voltage source V 1 and the second end P of inductance L
2Between.N+1 controlled switch S
1~ S
N+1An end (the first end P that is coupled to respectively inductance in order to anode and negative electrode with each battery unit
1Perhaps the second end P
2) and an other end (the second end P
2Perhaps first end P
1), comprise the controlled switch S of the anode 102 that is coupled to battery pack 101
1, be coupled to the controlled switch S of points of common connection 104
2~ S
N, and the controlled switch S that is coupled to the negative electrode 103 of battery pack 101
N+1
In some applications, only in the charging stage battery unit is carried out equilibrium.The balanced way of optimizing is exactly to behind the whole batteries charging, respectively full power state is arrived in each battery boost charge, namely battery unit is carried out boost charge.
In some applications, as inductive current I
LDrop to zero, by turn-offing rectifier switch R
1And R
4Prevent inductive current I
LBecome negative.That is, in the 3rd time period, rectifier switch R
1~ R
4Disconnect inductive current I
LBe zero.
Usually, MOS(metal-oxide semiconductor (MOS)) device is the optimal selection that realizes switch.The MOS device can be divided into P type MOS device and N-type MOS device, and controlled switch and rectifier switch both can use P type MOS also can use N-type MOS.Especially, in one embodiment, the battery balanced device 1100 shown in Figure 11 A can use P type MOS device MP
1Realize controlled switch S
1, use N-type MOS device MN
1Realize controlled switch S
N+1Battery anode is high potential relatively, and the grid-control voltage of P type MOS generally is lower than or equals the battery anode current potential; Cell cathode is relatively low current potential, and the grid-control voltage of N-type MOS generally is higher than or equals the battery pack cathode potential, can simplify like this grid control.Simultaneously, P type MOS is coupled to the relatively high battery anode of current potential, and N-type MOS is coupled to the relatively low battery pack negative electrode of current potential, avoids using the substrate choice device to select relatively low current potential, has simplified substrate control.
In one embodiment, at least one controlled switch comprises the P type MOS device MP of two series connection
2And MP
3, shown in Figure 11 B.The substrate of the P type MOS device of series connection is coupled to the common port of two P type MOS.In other embodiment, can realize controlled switch S with the P type MOS device of above-mentioned series connection
2~ S
N
In one embodiment, at least one controlled switch comprises the N-type MOS device MN of two series connection
2And MN
3, shown in Figure 11 C.The substrate of the N-type MOS device of series connection is respectively coupled to an other end relative with the common port of two N-type MOS.In other embodiment, can realize controlled switch S with the N-type MOS device of above-mentioned series connection
2~ S
NBattery pack 101 discharge and recharge or the battery unit charge and discharge process in, the voltage at inductance L two ends can change, and causes controlled switch S
2~ S
NWhen being coupled to the voltage of inductance L one end and be higher than, the time and be lower than the voltage that is coupled to points of common connection 104 1 ends.And the substrate of PMOS should be coupled to relative high potential, and the substrate of NMOS should be coupled to relative electronegative potential, otherwise break-through is leaked electricity.Above-mentioned two kinds of same type MOS devices series connection realizes the mode of switch, so that the substrate remain off of a MOS among series connection P type and the N-type MOS is avoided break-through, and then avoids using substrate to select circuit (selecting the connected mode of substrate according to current potential).
Can adopt equally the PMOS shown in Figure 11 A ~ 11C or NMOS to realize the controlled switch S of embodiment 900 shown in Figure 9
1~ S
N+1
Some may need hundreds of battery units in using.Can cause energy transfer rat low by carrying out power conversion between the battery unit or between battery unit and the battery pack.One of mode that solves is that these hundreds of battery units are divided into some battery pack (correspondingly the battery pack of these hundreds of battery units compositions is called the stack of cells group), in other words some battery pack is stacked into the stack of cells group that hundreds of battery units form.Use stacking balancer to battery pack carry out equilibrium (comprise that energy between stack of cells group and the battery pack shifts and battery pack between energy shift), use battery balanced device to battery unit carry out equilibrium (comprise that energy between battery pack and the battery unit shifts and battery unit between energy shift).
Figure 12 illustrates the circuit theory diagrams according to the stacking balancer 1200 of an embodiment of the utility model.Stacking balancer 1200 comprises battery balanced device group 1101, stacking rectifier switch SR
1~ SR
4, stacking inductance SL and stacking controlled switch SS
1~ SS
M+1Battery balanced device group 1101 comprises the battery balanced device PAC of a plurality of series connection
1~ PAC
MBattery balanced device group 1101 has anode 1102 and negative electrode 1103, and the stacking points of common connection 1104 that is connected to form of adjacent cell balancer.Stacking inductance SL has two ends, first end SP
1With the second end SP
2The first stacking rectifier switch SR
1Be coupled to the anode 1102 of battery balanced device group 1101 and the first end SP of stacking inductance SL
1Between.The second stacking rectifier switch SR
2Be coupled to the negative electrode 1103 of battery balanced device group 1101 and the first end SP of stacking inductance SL
1Between.The 3rd stacking rectifier switch SR
3Be coupled to the anode 1102 of battery balanced device group 1101 and the second end SP of stacking inductance SL
2Between.The 4th stacking rectifier switch SR
4Be coupled to the negative electrode 1103 of battery balanced device group 1101 and the second end SP of stacking inductance SL
2Between.M+1 stacking controlled switch SS
1~ SS
M+1In order to an end (the first end SP that respectively anode and the negative electrode (being anode and the negative electrode of its battery pack that comprises) of each battery balanced device is coupled to stacking inductance SL
1Perhaps the second end SP
2) and the other end (the second end SP
2Perhaps first end SP
1), comprise the stacking controlled switch S of the anode 1102 that is coupled to battery balanced device group 1101
1, be coupled to the stacking controlled switch SS of stacking points of common connection 1104
2~ SS
M, and the stacking controlled switch SS that is coupled to the negative electrode 1103 of battery balanced device group 1101
M+1
Compare with battery balanced device 100 shown in Figure 1, its difference is that stacking balancer 1200 uses battery balanced device group 1101 to replace battery pack 101.Therefore, aforementioned various operation principle about battery balanced device 100, improvement and distortion are equally applicable to stacking balancer 1200 shown in Figure 12.
Each battery balanced device all comprises a battery pack.In the following description, the battery pack that will need to reduce energy (electric weight or capacity) was called electric battery pack, and the battery balanced device that comprises this battery pack was called electric battery balanced device; The battery pack that needs are increased energy is called owes electric battery pack, and the battery balanced device that comprises this battery pack is called owes electric battery balanced device.
Battery pack is carried out balanced method to be had multiplely, comprises that the energy that will cross electric battery pack is transferred to the stack of cells group, the energy of stack of cells group is transferred to owes electric battery pack, and the energy that perhaps will cross electric battery pack is transferred to owes electric battery pack.Its operation principle can with reference between the battery pack of preamble and the battery unit and the energy between the battery unit shift.
Battery balanced device PAC
1~ PAC
MCan be existing various balancer, also can be shown in the background technology balancer, can also be the cited various balancers of the application.In one embodiment, one, a plurality of or all batteries balancer comprise the embodiment shown in Fig. 1 ~ 11C or are realized by the embodiment shown in above-mentioned Fig. 1 ~ 11C.
Because stacking balancer comprises a plurality of balancers, each balancer can carry out equilibrium to its battery unit that comprises independently, and this equilibrium can be carried out simultaneously, also can not carry out simultaneously.For example, at PAC
2When its battery unit that comprises is carried out equilibrium, PAC
1Also carry out equilibrium over against its battery unit that comprises.
Stacking balancer can at first carry out equilibrium by battery balanced device to battery unit to the equilibrium of battery unit, and then stacking balancer carries out equilibrium to battery pack; Also can at first carry out equilibrium by stacking balancer to battery pack, secondly battery balanced device carries out equilibrium to battery unit.Especially, in one embodiment, at the very first time section battery balanced device battery unit is carried out equilibrium, at stacking balancer of the second time period battery pack is carried out equilibrium, carry out again balanced at the 3rd time period battery balanced device to battery unit.
In a special embodiment, stacking balancer 1300 as shown in figure 13 comprises battery balanced device group, stacking inductance SL, stacking diode SD1 ~ SD4 and stacking controlled switch SM1 ~ SM4.The battery balanced device group comprises the battery balanced device group PAC of series connection
1~ PAC
3Stacking inductance SL has first end SP1 and the second end SP2.The first stacking diode SD1 is coupled between battery balanced device group anode and the stacking inductance SL first end SP1, the second stacking diode SD2 is coupled between battery balanced device group negative electrode and the stacking inductance SL first end SP1, the 3rd stacking diode SD3 is coupled between battery balanced device group anode and stacking inductance SL the second end SP2, and the 4th stacking diode SD4 is coupled between battery balanced device group negative electrode and stacking inductance SL the second end SP2.An end (first end SP1 or second end SP2) and the other end (second end SP2 or first end SP1) of stacking controlled switch SM1 ~ SM4 in order to respectively anode and the negative electrode (being anode and the negative electrode of its battery pack that comprises) of each battery balanced device is coupled to stacking inductance SL.
Battery balanced device PAC
1 Comprise battery pack 131, inductance L 1, rectifier diode D11 ~ D14 and controlled switch M11 ~ M15.Battery pack 131 comprises the battery unit C11 ~ C14 of series connection.Inductance L 1 comprises first end P3 and the second end P4.Diode D11 is coupled to the anode of battery pack 131 and the first end P3 of inductance L 1, diode D14 is coupled between the first end P3 of the negative electrode of battery pack 131 and inductance L 1, diode D12 is coupled between the second end P4 of the anode of battery pack 131 and inductance L 1, and diode D13 is coupled between the second end P4 of the negative electrode of battery pack 131 and inductance L 1.The end that controlled switch M11 ~ M15 is coupled to respectively inductance L 1 in order to anode and negative electrode with battery unit C11 ~ C14 (first end P3 or the second end P4) and the other end (the second end P4 or first end P3).
Battery balanced device PAC
2And PAC
3Have and battery balanced device PAC
1Essentially identical structure does not repeat them here.
Although the utility model is described in conjunction with its concrete illustrative embodiments, it should be apparent that, multiple alternative, revise and distortion is apparent for those skilled in the art.Thus, be schematically and also non-limiting in this illustrative embodiments of the present utility model of illustrating.Can in the situation that does not break away from spirit and scope of the present utility model, modify.
Employed measure word " one ", " a kind of " etc. do not get rid of plural number in this disclosure." first " in the literary composition, " second " etc. only are illustrated in the sequencing that occurs in the description of embodiment, so that distinguish like." first ", " second " appearance in claims are only for the ease of to the fast understanding of claim rather than in order to limit it.Any Reference numeral in claims all should not be construed as the restriction to scope.
Claims (10)
1. a battery balanced device is characterized in that, comprising:
Battery pack has anode and negative electrode, comprises the battery unit of N series connection, and wherein each battery unit all has anode and negative electrode, and N is the integer greater than 1;
Inductance has first end and the second end;
The first rectifier switch is coupled between the first end of the anode of described battery pack and described inductance;
The second rectifier switch is coupled between the first end of the negative electrode of described battery pack and described inductance;
The 3rd rectifier switch is coupled between the second end of the anode of described battery pack and described inductance;
The 4th rectifier switch is coupled between the second end of the negative electrode of described battery pack and described inductance; And
N+1 controlled switch, wherein the anode of each battery unit and negative electrode all are coupled to respectively the two ends of described inductance by controlled switch.
2. device according to claim 1 is characterized in that, described battery pack comprised electric battery unit, wherein:
In very first time section, be coupled to the controlled switch conducting of the electric battery unit negative electrode and positive electrode of described mistake, the electric battery unit of described mistake is to described induction charging, and the electric current of described inductance increases;
In the second time period, the controlled switch that is coupled to the electric battery unit negative electrode and positive electrode of described mistake turn-offs, and to described batteries charging, the electric current of described inductance reduces described inductance by corresponding rectifier switch.
3. device according to claim 2 is characterized in that, described first to fourth rectifier switch is diode.
4. device according to claim 1 is characterized in that, described battery pack comprises owes electric battery unit, wherein:
In very first time section, to described induction charging, the electric current of described inductance increases described battery pack by corresponding rectifier switch;
In the second time period, corresponding rectifier switch turn-offs, and is coupled to described controlled switch conducting of owing electric battery unit negative electrode and positive electrode, and described inductance is owed electric battery unit charging to described, and the electric current of described inductance reduces.
5. a battery balanced device is characterized in that, described battery balanced device comprises:
Battery pack comprises N battery unit of connecting, and wherein each battery unit all has anode and negative electrode, and N is the integer greater than 1;
Inductance has first end and the second end;
The first rectifier switch is coupled between the first end of the anode of a voltage source and described inductance;
The second rectifier switch is coupled between the first end of the negative electrode of described voltage source and described inductance;
The 3rd rectifier switch is coupled between the second end of the anode of described voltage source and described inductance;
The 4th rectifier switch is coupled between the second end of the negative electrode of described voltage source and described inductance;
N+1 controlled switch, wherein the anode of each battery unit and negative electrode all are coupled to respectively the two ends of described inductance by controlled switch.
6. device according to claim 5 is characterized in that, described battery pack comprises owes electric battery unit, wherein:
In very first time section, to described induction charging, the electric current of described inductance increases described voltage source by corresponding rectifier switch;
In the second time period, corresponding rectifier switch turn-offs, and is coupled to described controlled switch conducting of owing electric battery unit negative electrode and positive electrode, and described inductance is owed electric battery unit charging to described, and the electric current of described inductance reduces.
7. device according to claim 5 is characterized in that, at least one controlled switch comprises the MOS device of the same type of two series connection.
8. a stacking balancer is characterized in that, comprising:
The battery balanced device group has anode and negative electrode, comprises the battery balanced device of M series connection, and wherein each battery balanced device includes battery pack and has anode and negative electrode, and M is the integer greater than 1;
Stacking inductance has first end and the second end;
The first stacking rectifier switch is coupled between the first end of the anode of described battery balanced device group and described stacking inductance;
The second stacking rectifier switch is coupled between the second end of the negative electrode of battery balanced device group and described stacking inductance;
The 3rd stacking rectifier switch is coupled between the first end of the anode of described battery balanced device group and described stacking inductance;
The 4th stacking rectifier switch is coupled between the second end of the negative electrode of described battery balanced device group and described stacking inductance;
M+1 stacking controlled switch, wherein the anode of each battery balanced device and negative electrode all are coupled to respectively the two ends of described stacking inductance by stacking controlled switch.
9. device according to claim 8 is characterized in that, at least one described battery balanced device comprises the described battery balanced device of any one in the claim 1 ~ 7.
10. device according to claim 8 is characterized in that:
In very first time section, described battery balanced device carries out equilibrium to the battery unit that its battery pack comprises;
In the second time period, described stacking balancer carries out equilibrium to battery pack;
In the 3rd time period, described battery balanced device carries out equilibrium to the battery unit that its battery pack comprises.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202576252U CN202695664U (en) | 2012-06-04 | 2012-06-04 | Battery equalization device and stack equalization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202576252U CN202695664U (en) | 2012-06-04 | 2012-06-04 | Battery equalization device and stack equalization device |
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| Publication Number | Publication Date |
|---|---|
| CN202695664U true CN202695664U (en) | 2013-01-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107305971A (en) * | 2016-04-21 | 2017-10-31 | 凌力尔特有限公司 | Switchable inductor uses the energy storage device heap under background to balance |
-
2012
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107305971A (en) * | 2016-04-21 | 2017-10-31 | 凌力尔特有限公司 | Switchable inductor uses the energy storage device heap under background to balance |
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