CN108511817A - A kind of lithium-ion-power cell group active equalization circuit - Google Patents
A kind of lithium-ion-power cell group active equalization circuit Download PDFInfo
- Publication number
- CN108511817A CN108511817A CN201810235319.0A CN201810235319A CN108511817A CN 108511817 A CN108511817 A CN 108511817A CN 201810235319 A CN201810235319 A CN 201810235319A CN 108511817 A CN108511817 A CN 108511817A
- Authority
- CN
- China
- Prior art keywords
- battery
- ion
- lithium
- circuit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000178 monomer Substances 0.000 claims abstract description 79
- 239000004065 semiconductor Substances 0.000 claims description 83
- 230000005611 electricity Effects 0.000 claims description 24
- 238000004804 winding Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 13
- 229910001416 lithium ion Inorganic materials 0.000 claims description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
-
- H02J7/0026—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of lithium-ion-power cell group active equalization circuits, the active equalization circuit includes lithium-ion-power cell group, voltage acquisition module, gating circuit, commutating circuit, equalizer transformer and boosting battery circuit, the input terminal of the voltage acquisition module is separately connected lithium-ion-power cell group and boosting battery circuit, the control unit of the output end connection battery management system of the voltage acquisition module, one end of the gating circuit connects lithium-ion-power cell group, the other end and commutating circuit, equalizer transformer and boosting battery circuit are sequentially connected, the boosting battery circuit includes an auxiliary monomer battery, the equalizer transformer is a multiwinding transformer.Compared with prior art, circuit structure of the invention is simple, at low cost, safe and reliable, can promote battery capacity, and can effectively manage battery set charge/discharge state, improves battery pack service life.
Description
Technical field
The present invention relates to technical field of battery management, more particularly, to a kind of lithium-ion-power cell group active equalization electricity
Road.
Background technology
In recent years, lithium battery has obtained a large amount of uses on electric vehicle, mainly since lithium ion battery has volume
The small, advantages such as energy density is high, memory-less effect, cycle life are high, self-discharge rate is low.But hinder electric vehicle a wide range of at present
Universal bottleneck is still its battery durable problem, it is seen then that the efficient utilization and the raising in service life of lithium ion battery are to electronic
Automobile continue to develop it is most important.
Influence the consistency that a Li-ion batteries piles service life important factor is exactly single battery.Due to the work between monomer
Make environment temperature, battery capacity, internal resistance, the difference of SOC and self discharge, cause single battery in groups after, as charge and discharge follow
Ring number increases, and the difference between single battery is gradually broken up, and then battery performance is caused to deteriorate.
In order to solve the consistency problem of single battery, power electronic technique is usually utilized, it is equal in internal battery pack design
Weigh circuit.Equalizing circuit is generally divided into two kinds, and one is the systems of non-artificial intervention from balanced passive equilibrium, and another kind is people
For the active equalization for the purpose of the target taking human as setting of interference, specifically includes the equilibrium of energy dissipation formula and energy transfer formula is equal
Weighing apparatus.Its major function is no matter battery pack is in charging, electric discharge or placement process, all using in internal battery pack for electricity
Otherness between the monomer of pond carries out active equalization, various due to being generated during itself and use after battery group to eliminate
Inconsistency.But since the energy transfer in balancing procedure can generate thermal losses because of the balanced power supply itself the effect of due to characteristic,
And in the electrochemical properties of battery polarization resistance variation, can not really solve to ask with simple balancing energy mode
Topic.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of lithium ion power electricity
Pond group active equalization circuit.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of lithium-ion-power cell group active equalization circuit, which is characterized in that the active equalization circuit includes lithium ion
Power battery pack, voltage acquisition module, gating circuit, commutating circuit, equalizer transformer and boosting battery circuit, the voltage
The input terminal of acquisition module is separately connected lithium-ion-power cell group and boosting battery circuit, the voltage acquisition module it is defeated
Outlet connects the control unit of battery management system, and one end of the gating circuit connects lithium-ion-power cell group, another
End is sequentially connected with commutating circuit, equalizer transformer and boosting battery circuit, and the boosting battery circuit includes an auxiliary
Single battery, the equalizer transformer are a multiwinding transformer；
Voltage acquisition module acquires the voltage of the voltage of each single battery, gating circuit and commutating circuit to each single battery
Judged, selects to need balanced single battery in lithium-ion-power cell group, and by itself and auxiliary monomer cell parallel, lead to
Equalizer transformer is crossed to complete to need the energy transfer between balanced single battery and auxiliary monomer battery.
Preferably, the boosting battery circuit by the armature winding for the equalizer transformer being sequentially connected in series, a metal-oxide-semiconductor,
Current sensor and auxiliary monomer battery composition.
Preferably, the gating circuit includes a plurality of odd number branch and even number branch, and odd number branch circuit parallel connection divides together
Not Xing Cheng two public outputs, even number branch circuit parallel connection is respectively formed two public outputs together, even number branch one end and
Odd number branch one end is alternately connected to each single battery both ends in lithium-ion-power cell group, and the even number branch other end connects even number
The public output that branch circuit parallel connection is formed, the odd number branch other end connect the public output that odd number branch circuit parallel connection is formed.
Preferably, two metal-oxide-semiconductors of every branch road differential concatenation, and the diode of two metal-oxide-semiconductors and two differential concatenations
Parallel connection, the conducting direction of diode are opposite with the conducting direction of its metal-oxide-semiconductor in parallel.
Preferably, the commutating circuit includes metal-oxide-semiconductor and diode in parallel therewith, and the number of metal-oxide-semiconductor is eight, often
Two metal-oxide-semiconductor differential concatenations are one group, the diodes in reverse series in parallel with two metal-oxide-semiconductors, the conducting direction of diode and its
Metal-oxide-semiconductor in parallel conducting direction it is opposite；Two source electrodes of first two groups of four metal-oxide-semiconductors respectively with two in gating circuit
Public output be connected, other two sources connected in parallel together be used as a public output, the two of latter two groups of four metal-oxide-semiconductors
A source electrode is connected with other two public output in gating circuit respectively, other two sources connected in parallel is used as one together
Two public outputs of public output, commutating circuit are connected with the secondary windings of equalizer transformer and a metal-oxide-semiconductor.
Preferably, the commutating circuit is dpdt relay, the odd number branch circuit parallel connection of gating circuit shape together
At a public output, even number branch circuit parallel connection forms a public output together, two public outputs respectively with it is double
Two of dpdt double-pole double-throw (DPDT) relay input contacts are connected, two output contacts of dpdt relay respectively with equalizer transformer
Secondary windings and a metal-oxide-semiconductor connection.
Preferably for the lithium-ion-power cell group being made of N number of concatenated single battery, adopted using N+1 voltage
Collect module and carry out voltage measurement, wherein N number of voltage acquisition module is used to carry out voltage measurement, 1 voltage acquisition to single battery
Module is used to carry out voltage measurement to auxiliary monomer battery.
Preferably, the capacity of the auxiliary monomer battery is the capacity of the single battery in lithium-ion-power cell group
25%~150%.
Preferably, the metal-oxide-semiconductor is replaced using the combination of any one following device or arbitrary two kinds of devices：
NMOS tube, PMOS tube, DUAL NMOS tubes or DUAL PMOS tube.
Preferably, the balancing procedure of the active equalization circuit is：
S1, voltage acquisition module acquire the voltage and auxiliary monomer electricity of each single battery in lithium-ion-power cell group
The auxiliary battery voltage in pond, if entering step S2 in whole discharge condition in lithium-ion-power cell group, if lithium ion is dynamic
Power battery pack is in whole charged state, then enters step S3, if lithium-ion-power cell group generally in static condition, into
Enter step S4；
If the auxiliary battery voltage of S2, voltage acquisition module acquisition is higher than minimum single battery in lithium-ion-power cell group
Voltage, then the single battery for selecting the voltage minimum, the minimum single battery of battery management system control unit conducting voltage with
Gating circuit between auxiliary monomer battery and commutating circuit make auxiliary monomer battery to lithium ion power electricity using equalizer transformer
Minimum single battery charging in the group of pond；If the auxiliary battery voltage of voltage acquisition module acquisition is less than lithium-ion-power cell group
In minimum single battery voltage, then wouldn't carry out equalization operation, lithium-ion-power cell group is made to continue to discharge, repeat step S2
Until the voltage difference in lithium-ion-power cell group between each single battery is less than setting value；
If the voltage of highest single battery is single higher than auxiliary in the lithium-ion-power cell group of S3, voltage acquisition module acquisition
The voltage of body battery, then select the highest single battery of the voltage, and battery management system control unit is by conducting voltage highest list
Gating circuit between body battery and auxiliary monomer battery and commutating circuit make the highest single battery of voltage using equalizer transformer
It charges to auxiliary monomer battery；If the electricity of highest single battery in the lithium-ion-power cell group of voltage acquisition module acquisition
It forces down in the voltage of auxiliary monomer battery, then wouldn't carry out equalization operation, lithium-ion-power cell group is made to continue to charge, repeat to walk
Rapid S3 is until the voltage difference in lithium-ion-power cell group between each single battery is less than setting value；
S4, selection voltage are less than the single battery of auxiliary battery voltage, and the conducting of battery management system control unit is chosen
Gating circuit between single battery and auxiliary monomer battery and commutating circuit make auxiliary monomer battery to choosing using equalizer transformer
In single battery charge；Voltage is selected to be higher than the single battery of auxiliary battery voltage, battery management system control unit
The gating circuit and commutating circuit between the single battery chosen and auxiliary monomer battery is connected, makes to choose using equalizer transformer
Single battery charges to auxiliary monomer battery；The list that auxiliary monomer battery charges to the single battery chosen, chooses
Two processes that body battery charges to auxiliary monomer battery alternately, until each monomer electricity in lithium-ion-power cell group
Voltage difference between pond is less than setting value.
Compared with prior art, the present invention has the following advantages：
One, lithium-ion-power cell group active equalization circuit provided by the invention is simple in structure, at low cost, easily controllable；
Two, the present invention carries out balanced management using auxiliary monomer battery to the single battery in lithium-ion-power cell group,
Judgement by gating circuit and commutating circuit to voltage swing, in conjunction with equalizer transformer effect, it can be achieved that lithium ion power
The transfer of energy between single battery in battery pack and auxiliary monomer battery, and can realize the storage of energy, and then realize
Efficient management to battery pack；
Three, the capacity for the auxiliary monomer battery that the present invention uses is the capacity of the single battery in lithium-ion-power cell group
25%~150%, compared to the mode of other energy transfers and storage, auxiliary monomer battery in lithium-ion-power cell group
The voltage of single battery be closer to so that equalizer transformer has higher working efficiency；Also using boosting battery
The more considerable ability of equalization can be obtained, but also can effectively promote the capacity of integral battery group；
Four, present invention employs equalizer transformers, can provide suitable euqalizing current as needed, can be effectively prevented from
In charge and discharge process, the voltage of single battery to be equalized is needed to reach unanimity institute in the voltage and battery pack of auxiliary monomer battery
The excessively small problem of caused euqalizing current, and then ensure that equalization efficiency；
Five, two metal-oxide-semiconductors and diode in parallel therewith composition may be used in every branch of commutating circuit of the invention,
Metal-oxide-semiconductor composition public input terminal be connected with the public output in gating circuit, metal-oxide-semiconductor form public output with it is balanced
The secondary windings of transformer and a metal-oxide-semiconductor are connected, and can effectively avoid the short circuit phenomenon of the single battery in battery pack, be promoted
The safety of circuit system；
Six, commutating circuit of the invention can also be made of a dpdt relay so that and circuit is simpler, and
Simplify the program control of commutating circuit.
Description of the drawings
The principle schematic of Fig. 1 active equalization circuits between the single battery based on auxiliary monomer battery；
Fig. 2 is a kind of electrical block diagram of lithium-ion-power cell group active equalization circuit；
When Fig. 3 is that single battery of the auxiliary monomer battery into lithium-ion-power cell group charges in the embodiment of the present invention 1
Equivalent circuit diagram；
Fig. 4 charges for the single battery in lithium-ion-power cell group in the embodiment of the present invention 1 to auxiliary monomer battery
When equivalent circuit diagram；
Shown in figure label：
1, voltage acquisition module, 2, lithium-ion-power cell group, 3, gating circuit, 4, metal-oxide-semiconductor, 5, commutating circuit, 6,
Weigh transformer, and 7, auxiliary monomer battery, 8, current sensor, 9, diode.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The basic principle of the present invention as shown in Figure 1, lithium-ion-power cell group is made of multiple single batteries, i.e. B1, B2,
B3、B4、B5、B6、。。。, single battery by the left and right sides accordingly switch S1, S2, S3, S4, S5, S6, S7,...Control.It is elected
When selecting the progress balanced management of n-th single battery, closure switch SNAnd SN+1, according to the boosting battery of auxiliary monomer battery B0 electricity
The size of pressure and n-th monomer battery voltage, determines the conducting direction of commutating circuit, by the effect of equalizer transformer 6, realizes
Need the energy transfer between balanced battery cell and auxiliary monomer battery B0.
As shown in Fig. 2, the present invention provides a kind of lithium-ion-power cell group active equalization circuit, which is base
The active equalization circuit between the single battery of auxiliary monomer battery, including voltage acquisition module 1, lithium-ion-power cell group 2, choosing
Circuit passband 3, commutating circuit 5, equalizer transformer 6, auxiliary monomer battery 7 and current sensor 8.
Voltage acquisition module 1 connects each single battery and auxiliary monomer battery 7 in lithium-ion-power cell group 2, electricity
Acquisition module 1 is pressed to acquire the voltage of each single battery in lithium-ion-power cell group 2, while also acquisition auxiliary monomer electricity in real time
The auxiliary battery voltage in pond 7；Current sensor 8 acquires the current signal of auxiliary monomer battery 7, collected voltage signal and electricity
Stream signal is sent to the control unit of battery management system, and current sensor 8 can monitor the maximum in equalizing circuit simultaneously
Electric current.
Gating circuit 3 is used to select to need to carry out balanced single battery in lithium-ion-power cell group 2, according to auxiliary electricity
The size of the voltage of cell voltage and the balanced single battery of needs, determines 5 switching electric current conducting direction of commutating circuit；And by changing
Keep the single battery of needs equilibrium in parallel with auxiliary monomer battery 7 to circuit 5, the balanced management of the single battery is realized with this.
Gating circuit 3 is made of N+1 branch, and N is the number of single battery, wherein odd number branch circuit parallel connection divides together
Not Xing Cheng two public outputs, even number branch circuit parallel connection is respectively formed two public outputs together.Every branch road is to leak
Extremely connected mode is connected two metal-oxide-semiconductors 4, the diode 9 in parallel with two metal-oxide-semiconductors 4 also differential concatenation, and diode 9 is led
Logical direction is opposite with its conducting direction of metal-oxide-semiconductor 4 in parallel.The purpose of the diode 9 of reverse-conducting in parallel is to make electricity
Road can be bidirectionally conductive, and the positive and negative anodes of each single battery are in series with a branch in lithium-ion-power cell group 2.
Commutating circuit 5 is made of eight metal-oxide-semiconductors, and each two metal-oxide-semiconductor is one group, two metal-oxide-semiconductor differential concatenations, with two
The diode of metal-oxide-semiconductor parallel connection also differential concatenation, and the conducting direction of diode is opposite with its metal-oxide-semiconductor conducting direction in parallel.
Two source electrodes of first two groups of four metal-oxide-semiconductors are connected with two public outputs in gating circuit 3 respectively, other two source electrode
It is connected in parallel as a public output.Afterwards two source electrodes of two groups of four metal-oxide-semiconductors respectively with it is another in gating circuit 3
Outer two public outputs are connected, other two sources connected in parallel is used as a public output together.Two of commutating circuit 5
Public output is connected with the secondary windings of equalizer transformer 6 and a metal-oxide-semiconductor.The armature winding of equalizer transformer 6 and one
Metal-oxide-semiconductor and current sensor 8, the series connection of auxiliary monomer battery 7 form boosting battery circuit.
The voltage signal that battery management system is acquired according to voltage acquisition module 1 controls the break-make of corresponding metal-oxide-semiconductor, profit
It is selected with gating circuit 3 and needs to carry out balanced single battery, commutating circuit 5 is recycled to make two public affairs in gating circuit 3
Output end is connected with the secondary windings of equalizer transformer 6 and a metal-oxide-semiconductor respectively altogether, is converted by the energy of equalizer transformer 6
The energy transfer between single battery and auxiliary monomer battery 7 is realized in effect, to realize balanced management.
In the equalizing circuit of the present invention, following any one device or two kinds arbitrary may be used in metal-oxide-semiconductor used
The combination of device is replaced：NMOS tube, PMOS tube, DUAL NMOS tubes or DUAL PMOS tube.
The conducting of all metal-oxide-semiconductors in circuit of the present invention is with cut-off (or switching of relay contact) by battery management
The control unit of system makes control according to coherent signal and algorithm.In no control signal, the metal-oxide-semiconductor in circuit and two poles
Pipe can prevent the flowing of bidirectional current.
The capacity of the auxiliary monomer battery used in circuit of the present invention can be the monomer electricity in lithium-ion-power cell group
The 25%~150% of the capacity in pond selects capacity less than other batteries of the cell capacity in lithium-ion-power cell group
When, it is cost-saved.
The control unit of battery management system passes through single to single battery and auxiliary all in lithium-ion-power cell group 2
The voltage of body battery 7, the multilevel iudge of state-of-charge and capacity realize balanced management in conjunction with the effect of equalizer transformer 6.Its
Specifically equalization methods are：
In the dynamic charge and discharge process of lithium-ion-power cell group 2, discharge when lithium-ion-power cell group 2 is in whole
Process when, select the lower single battery of voltage, using equalizer transformer 6, make monomer electricity of the auxiliary monomer battery 7 to selection
It charges in pond；When lithium-ion-power cell group 2 is in the process integrally to charge, the higher single battery of voltage, profit are selected
The single battery is set to charge auxiliary monomer battery 7 with equalizer transformer 6；In the standing item of lithium-ion-power cell group 2
Under part, auxiliary monomer battery 7 can charge to the single battery with minimum voltage by equalizer transformer 6, can also
Make that there is the single battery higher than auxiliary battery voltage to charge to auxiliary monomer battery 7 by equalizer transformer 6, it is so anti-
It is multiple, realize the energy transfer needed between balanced single battery and auxiliary monomer battery 7, and realize energy in auxiliary monomer battery
Storage on 7 and output make lithium-ion-power cell group 2 have better consistency.
The present embodiment is by taking the lithium-ion-power cell group 2 that four pieces of single batteries are constituted as an example, and certainly, the present embodiment is simultaneously unlimited
The number of order body battery, in other embodiment, can connect five pieces of even more single batteries.In addition, auxiliary monomer is electric
Single battery in pond 7 and lithium-ion-power cell group 2 is same model, but capacity can also be selected equal or smaller electricity
Pond.The balance charge/discharge process of the present embodiment is as follows：
Lithium-ion-power cell group 2 is set during the whole electric discharge, single battery 101 be a certain moment voltage compared with
Low single battery, equivalent circuit when auxiliary monomer battery 7 charges to single battery 101 are as shown in Figure 3.Single battery
101 by battery management system selection need carry out balanced management, single battery 101 connect gating circuit 3 two branches, first
Item branch road metal-oxide-semiconductor 202 is cascaded with metal-oxide-semiconductor 203 in a manner of draining and being connected, 208 He of Article 2 branch road metal-oxide-semiconductor
Metal-oxide-semiconductor 209 is cascaded in a manner of draining and being connected, a branch of first branch connection commutating circuit 5 of gating circuit 3
Road, the metal-oxide-semiconductor 204 of the branch road and metal-oxide-semiconductor 205 are cascaded in a manner of draining and being connected, the source electrode of metal-oxide-semiconductor 205 with it is equal
The secondary windings of weighing apparatus transformer 6 is connected.One branch of the Article 2 branch connection commutating circuit 5 of single battery gating circuit 3,
The metal-oxide-semiconductor 210 of the branch road is cascaded with metal-oxide-semiconductor 211 in a manner of draining and being connected, and the source electrode of metal-oxide-semiconductor 211 becomes with balanced
The secondary windings of depressor 6 and 212 phase of a metal-oxide-semiconductor series winding.The armature winding of equalizer transformer 6 and a metal-oxide-semiconductor 213 and electricity
Flow sensor 8, auxiliary monomer battery 7 are in series.The control unit of battery management system controls metal-oxide-semiconductor 202,204,209,211
Conducting, control metal-oxide-semiconductor 203,205,208,210,212 end, and control conducting and the cutoff frequency of metal-oxide-semiconductor 213, make balanced transformation
Suitable electric current is motivated in the secondary windings of device 6, and auxiliary monomer battery 7 is made to charge single battery 101.Charging terminates
Afterwards, the control unit of battery management system controls metal-oxide-semiconductor 202,203,204,205,206,208,209,210,211,212,213
Cut-off.
Lithium-ion-power cell group 2 is set during the whole charging, single battery 101 be a certain moment voltage compared with
High single battery, equivalent circuit diagram when single battery 101 charges to auxiliary monomer battery 7 are as shown in Figure 4.Monomer electricity
Pond 101 is needed to carry out balanced management by battery management system selection, and single battery 101 connects two branches of gating circuit 3, the
One branch road metal-oxide-semiconductor 202 is cascaded with metal-oxide-semiconductor 203 in a manner of draining and being connected, 208 He of Article 2 branch road metal-oxide-semiconductor
Metal-oxide-semiconductor 209 is cascaded in a manner of draining and being connected, a branch of 3 first branch connection commutating circuits 5 of gating circuit
Road, the metal-oxide-semiconductor 204 of the branch road and metal-oxide-semiconductor 205 are cascaded in a manner of draining and being connected, the source electrode of metal-oxide-semiconductor 205 with it is equal
The secondary windings of weighing apparatus transformer 6 is connected.One branch of the Article 2 branch connection commutating circuit 5 of single battery gating circuit 3,
The metal-oxide-semiconductor 210 of the branch road is cascaded with metal-oxide-semiconductor 211 in a manner of draining and being connected, and the source electrode of metal-oxide-semiconductor 211 becomes with balanced
The secondary windings of depressor 6 and 212 phase of a metal-oxide-semiconductor series winding.The armature winding of equalizer transformer 6 and a metal-oxide-semiconductor 213 and electricity
Flow sensor 8, auxiliary monomer battery 7 are in series.Battery management system control unit control metal-oxide-semiconductor 203,205,208,210,
Conducting, control metal-oxide-semiconductor 202,204,209,211,213 end, and the frequency of the conducting and cut-off of control metal-oxide-semiconductor 212 makes balanced change
Suitable electric current is motivated in the armature winding of depressor 6, and single battery 101 is made to charge auxiliary monomer battery 7.Charging knot
Shu Hou, battery management system control unit control metal-oxide-semiconductor 202,203,204,205,208,209,210,211,212,213 sections
Only.
When lithium-ion-power cell group 2 is in static condition, setting single battery 101 is that a certain moment voltage is minimum
Single battery, battery management system charge to it by auxiliary monomer battery 7 is controlled, and equivalent circuit diagram is as shown in Figure 3,
The ON-OFF control of MOS switch pipe fills single battery with boosting battery under the whole discharge condition of lithium-ion-power cell group 2
It is consistent when electric.
When lithium-ion-power cell group 2 is in static condition, setting single battery 101 is a certain moment voltage than auxiliary
The high single battery of 7 voltage of single battery, battery management system charge to it by auxiliary monomer battery 7 is controlled, equivalent electricity
Road figure is as shown in Figure 4, and the ON-OFF control of MOS switch pipe and single battery under battery pack entirety charged state are electric to auxiliary
Pond is consistent when charging.
Embodiment 2
In the lithium-ion-power cell group active equalization circuit of the present embodiment, commutating circuit is by a dpdt relay
It substitutes, under such form, the odd number branch circuit parallel connection of gating circuit forms a public output together, and even number branch is simultaneously
It is linked togather to form a public output, two public outputs input contact phase with two of dpdt relay respectively
Even, two output contacts of dpdt relay are connected with the secondary windings of equalizer transformer and a metal-oxide-semiconductor；This implementation
The other structures of example are the same as embodiment 1.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The staff for being familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain subject to.
Claims (10)
1. a kind of lithium-ion-power cell group active equalization circuit, which is characterized in that the active equalization circuit includes that lithium ion is dynamic
Power battery pack, voltage acquisition module, gating circuit, commutating circuit, equalizer transformer and boosting battery circuit, the voltage are adopted
The input terminal of collection module is separately connected lithium-ion-power cell group and boosting battery circuit, the output of the voltage acquisition module
The control unit of end connection battery management system, one end of the gating circuit connect lithium-ion-power cell group, the other end
It is sequentially connected with commutating circuit, equalizer transformer and boosting battery circuit, the boosting battery circuit includes that an auxiliary is single
Body battery, the equalizer transformer are a multiwinding transformer；
Voltage acquisition module acquires the voltage of each single battery, gating circuit and commutating circuit and is carried out to the voltage of each single battery
Judge, selects to need balanced single battery in lithium-ion-power cell group, and by itself and auxiliary monomer cell parallel, by equal
The transformer that weighs is completed to need the energy transfer between balanced single battery and auxiliary monomer battery.
2. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that described is auxiliary
Help battery circuit by the armature winding for the equalizer transformer being sequentially connected in series, a metal-oxide-semiconductor, current sensor and auxiliary monomer battery
Composition.
3. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that the choosing
Circuit passband includes a plurality of odd number branch and even number branch, and odd number branch circuit parallel connection is respectively formed two public outputs together, even
Number branch circuit parallel connection is respectively formed two public outputs together, and even number branch one end and odd number branch one end are alternately connected to lithium
Each single battery both ends in ion battery group, the even number branch other end connect the public output that even number branch circuit parallel connection is formed
End, the odd number branch other end connect the public output that odd number branch circuit parallel connection is formed.
4. a kind of lithium-ion-power cell group active equalization circuit according to claim 3, which is characterized in that every branch
Two metal-oxide-semiconductors of upper differential concatenation, and the diodes in parallel of two metal-oxide-semiconductors and two differential concatenations, the conducting direction of diode with
The conducting direction of its metal-oxide-semiconductor in parallel is opposite.
5. a kind of lithium-ion-power cell group active equalization circuit according to claim 4, which is characterized in that described changes
Include metal-oxide-semiconductor and diode in parallel therewith to circuit, the number of metal-oxide-semiconductor is eight, and each two metal-oxide-semiconductor differential concatenation is one
Group, the diodes in reverse series in parallel with two metal-oxide-semiconductors, the conducting side of the conducting direction of the diode metal-oxide-semiconductor in parallel with it
To opposite；Two source electrodes of first two groups of four metal-oxide-semiconductors are connected with two public outputs in gating circuit respectively, and in addition two
A sources connected in parallel is used as a public output together, two source electrodes of latter two groups of four metal-oxide-semiconductors respectively with gating circuit
In other two public output be connected, other two sources connected in parallel together be used as a public output, commutating circuit
Two public outputs be connected with the secondary windings of equalizer transformer and a metal-oxide-semiconductor.
6. a kind of lithium-ion-power cell group active equalization circuit according to claim 4, which is characterized in that described changes
It is dpdt relay to circuit, the odd number branch circuit parallel connection of gating circuit forms a public output, even number branch together
Road is connected in parallel to form a public output, and two public outputs are touched with two inputs of dpdt relay respectively
Point is connected, and two output contacts of dpdt relay are connect with the secondary windings of equalizer transformer and a metal-oxide-semiconductor respectively.
7. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that for by N
The lithium-ion-power cell group of a concatenated single battery composition, voltage measurement is carried out using N+1 voltage acquisition module,
In, N number of voltage acquisition module is used to carry out voltage measurement to single battery, and 1 voltage acquisition module is used for auxiliary monomer electricity
Pond carries out voltage measurement.
8. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that described is auxiliary
It is the 25%~150% of the capacity of the single battery in lithium-ion-power cell group to help the capacity of single battery.
9. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that described
Metal-oxide-semiconductor is replaced using the combination of any one following device or arbitrary two kinds of devices：NMOS tube, PMOS tube, DUAL
NMOS tube or DUAL PMOS tube.
10. according to a kind of lithium-ion-power cell group active equalization circuit of claim 1-9 any one of them, feature exists
In the balancing procedure of the active equalization circuit is：
The voltage and auxiliary monomer battery of S1, each single battery in voltage acquisition module acquisition lithium-ion-power cell group
Auxiliary battery voltage, if S2 is entered step, if lithium ion power is electric in whole discharge condition in lithium-ion-power cell group
Pond group is in whole charged state, then enters step S3, if lithium-ion-power cell group enters step generally in static condition
Rapid S4；
If the auxiliary battery voltage of S2, voltage acquisition module acquisition is higher than the electricity of minimum single battery in lithium-ion-power cell group
Pressure, the then single battery for selecting the voltage minimum, the minimum single battery of battery management system control unit conducting voltage and auxiliary
Gating circuit between single battery and commutating circuit make auxiliary monomer battery to lithium-ion-power cell group using equalizer transformer
In minimum single battery charging；If the auxiliary battery voltage of voltage acquisition module acquisition is less than in lithium-ion-power cell group most
The voltage of low single battery wouldn't then carry out equalization operation, lithium-ion-power cell group is made to continue to discharge, repeat step S2 until
Voltage difference in lithium-ion-power cell group between each single battery is less than setting value；
If the voltage of highest single battery is higher than auxiliary monomer electricity in the lithium-ion-power cell group of S3, voltage acquisition module acquisition
The voltage in pond then selects the highest single battery of the voltage, battery management system control unit that conducting voltage highest monomer is electric
Gating circuit between pond and auxiliary monomer battery and commutating circuit make the highest single battery of voltage to auxiliary using equalizer transformer
Single battery is helped to charge；If the voltage of highest single battery is low in the lithium-ion-power cell group of voltage acquisition module acquisition
In the voltage of auxiliary monomer battery, then equalization operation wouldn't be carried out, lithium-ion-power cell group is made to continue to charge, repeat step S3
Until the voltage difference in lithium-ion-power cell group between each single battery is less than setting value；
S4, selection voltage are less than the single battery of auxiliary battery voltage, and the monomer chosen is connected in battery management system control unit
Gating circuit between battery and auxiliary monomer battery and commutating circuit make auxiliary monomer battery to choosing using equalizer transformer
Single battery charges；Voltage is selected to be higher than the single battery of auxiliary battery voltage, the conducting of battery management system control unit
Gating circuit between the single battery chosen and auxiliary monomer battery and commutating circuit, the monomer for making to choose using equalizer transformer
Battery charges to auxiliary monomer battery；The monomer electricity that auxiliary monomer battery charges to the single battery chosen, chooses
Two processes that pond charges to auxiliary monomer battery alternately, until in lithium-ion-power cell group between each single battery
Voltage difference be less than setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235319.0A CN108511817A (en) | 2018-03-21 | 2018-03-21 | A kind of lithium-ion-power cell group active equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235319.0A CN108511817A (en) | 2018-03-21 | 2018-03-21 | A kind of lithium-ion-power cell group active equalization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108511817A true CN108511817A (en) | 2018-09-07 |
Family
ID=63377850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810235319.0A Pending CN108511817A (en) | 2018-03-21 | 2018-03-21 | A kind of lithium-ion-power cell group active equalization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108511817A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177816A (en) * | 2018-09-30 | 2019-01-11 | 河南新太行电源股份有限公司 | A kind of power battery automatic equalization system device |
| CN109193050A (en) * | 2018-10-08 | 2019-01-11 | 爱驰汽车有限公司 | Battery parlor electricity active equalization method and device |
| CN110239396A (en) * | 2019-06-26 | 2019-09-17 | 山东大学 | Battery pack balancing module, system and control method based on two-way flyback converter |
| CN110323801A (en) * | 2019-05-29 | 2019-10-11 | 南京理工大学 | A kind of energy-storage system battery module equalizing structure and control method |
| CN110391682A (en) * | 2019-06-24 | 2019-10-29 | 香港生产力促进局 | A kind of battery charge-discharge circuit |
| CN111200307A (en) * | 2020-01-16 | 2020-05-26 | 珠海格力电器股份有限公司 | Energy balance control device, battery system and energy balance control method thereof |
| CN111426964A (en) * | 2020-04-29 | 2020-07-17 | 成都极空科技有限公司 | Battery pack voltage acquisition circuit based on MOS (metal oxide semiconductor) tube gating matrix |
| CN112054688A (en) * | 2020-08-30 | 2020-12-08 | 哈尔滨工程大学 | Modular energy storage system equalizing circuit with bidirectional current capability |
| WO2021191065A1 (en) * | 2020-03-24 | 2021-09-30 | Voith Patent Gmbh | Redox flow battery system and operating method |
| CN114156981A (en) * | 2021-12-03 | 2022-03-08 | 傲普(上海)新能源有限公司 | Battery module equalization control circuit and method based on transformer |
| CN114914990A (en) * | 2022-05-31 | 2022-08-16 | 广东海明晖电子科技有限公司 | Charge-discharge balance control method for built-in battery pack of portable electrical appliance |
| CN117890829A (en) * | 2024-01-16 | 2024-04-16 | 国网湖北省电力有限公司十堰供电公司 | Detection device, power supply method and power supply device of energy storage transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656142A (en) * | 2016-03-10 | 2016-06-08 | 北京航空航天大学 | Charge and discharge active equalization circuit of lithium-ion power battery pack |
| CN106183849A (en) * | 2016-07-11 | 2016-12-07 | 北京长城华冠汽车科技股份有限公司 | The equalizing circuit of a kind of batteries of electric automobile and electric automobile |
-
2018
- 2018-03-21 CN CN201810235319.0A patent/CN108511817A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656142A (en) * | 2016-03-10 | 2016-06-08 | 北京航空航天大学 | Charge and discharge active equalization circuit of lithium-ion power battery pack |
| CN106183849A (en) * | 2016-07-11 | 2016-12-07 | 北京长城华冠汽车科技股份有限公司 | The equalizing circuit of a kind of batteries of electric automobile and electric automobile |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109177816B (en) * | 2018-09-30 | 2019-11-29 | 河南新太行电源股份有限公司 | A kind of power battery automatic equalization system device |
| CN109177816A (en) * | 2018-09-30 | 2019-01-11 | 河南新太行电源股份有限公司 | A kind of power battery automatic equalization system device |
| CN109193050A (en) * | 2018-10-08 | 2019-01-11 | 爱驰汽车有限公司 | Battery parlor electricity active equalization method and device |
| CN110323801A (en) * | 2019-05-29 | 2019-10-11 | 南京理工大学 | A kind of energy-storage system battery module equalizing structure and control method |
| CN110391682B (en) * | 2019-06-24 | 2023-12-01 | 香港生产力促进局 | Battery charging and discharging circuit |
| CN110391682A (en) * | 2019-06-24 | 2019-10-29 | 香港生产力促进局 | A kind of battery charge-discharge circuit |
| CN110239396A (en) * | 2019-06-26 | 2019-09-17 | 山东大学 | Battery pack balancing module, system and control method based on two-way flyback converter |
| CN111200307A (en) * | 2020-01-16 | 2020-05-26 | 珠海格力电器股份有限公司 | Energy balance control device, battery system and energy balance control method thereof |
| WO2021191065A1 (en) * | 2020-03-24 | 2021-09-30 | Voith Patent Gmbh | Redox flow battery system and operating method |
| CN111426964A (en) * | 2020-04-29 | 2020-07-17 | 成都极空科技有限公司 | Battery pack voltage acquisition circuit based on MOS (metal oxide semiconductor) tube gating matrix |
| CN112054688A (en) * | 2020-08-30 | 2020-12-08 | 哈尔滨工程大学 | Modular energy storage system equalizing circuit with bidirectional current capability |
| CN112054688B (en) * | 2020-08-30 | 2022-01-14 | 哈尔滨工程大学 | Modular energy storage system equalizing circuit with bidirectional current capability |
| CN114156981A (en) * | 2021-12-03 | 2022-03-08 | 傲普(上海)新能源有限公司 | Battery module equalization control circuit and method based on transformer |
| CN114914990A (en) * | 2022-05-31 | 2022-08-16 | 广东海明晖电子科技有限公司 | Charge-discharge balance control method for built-in battery pack of portable electrical appliance |
| CN117890829A (en) * | 2024-01-16 | 2024-04-16 | 国网湖北省电力有限公司十堰供电公司 | Detection device, power supply method and power supply device of energy storage transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108511817A (en) | A kind of lithium-ion-power cell group active equalization circuit | |
| CN103329338B (en) | Battery pack and power consumption apparatus | |
| CN114709896B (en) | Battery charging and discharging system based on reconstruction and charging and discharging control method | |
| CN105656142B (en) | A kind of charging/discharging active equalization circuit for lithium ion power battery pack | |
| CN102195314B (en) | Circuit and method for balancing battery cells | |
| CN108599282A (en) | A kind of lithium-ion-power cell group charge and discharge active equalization system and method | |
| CN108134414B (en) | Modular equalization circuit and equalization mode thereof | |
| CN107968452A (en) | A kind of passive mixed equilibrium system and method for the master of lithium-ion-power cell group | |
| CN105140998B (en) | The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage | |
| CN106849266B (en) | A kind of equalizing circuit for charging and discharging lithium battery energy management | |
| CN105391130B (en) | Battery equalizing circuit and its control method based on multiphase interleaved converter | |
| CN105449296A (en) | Nondestructive equilibrium management system of modular high-power battery pack | |
| CN107134599B (en) | Voltage equalization circuit of series battery pack and working method thereof | |
| CN108539813A (en) | A kind of lithium-ion-power cell active equalization method | |
| CN107733007A (en) | A kind of direct equalizing circuit of battery pack Bi-objective and equalization methods | |
| CN108471149A (en) | A kind of lithium-ion-power cell group active equalization circuit | |
| CN104113110A (en) | Battery equalization circuit | |
| CN105162199A (en) | Layered balancing circuit for battery pack | |
| CN109347173B (en) | Battery pack balance control circuit and method based on switched capacitor | |
| CN103036256A (en) | Transformer scan chain type storage battery equalizing circuit and method | |
| CN108879833A (en) | A kind of active equalizer circuit of cell pack and equalization methods | |
| JP2016025782A (en) | Capacity equalization device | |
| CN102376979A (en) | Charge-discharge automatically equalized lithium-ion power battery series battery pack | |
| CN103036277B (en) | Equalizer circuit of dynamic and energy storage battery pack | |
| CN104393631A (en) | Electric quantity balancing system and balancing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180907 |