CN105140996B - A kind of Li-ion batteries piles balanced management system and balance control method - Google Patents
A kind of Li-ion batteries piles balanced management system and balance control method Download PDFInfo
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- CN105140996B CN105140996B CN201510555311.9A CN201510555311A CN105140996B CN 105140996 B CN105140996 B CN 105140996B CN 201510555311 A CN201510555311 A CN 201510555311A CN 105140996 B CN105140996 B CN 105140996B
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Abstract
The present invention relates to a kind of Li-ion batteries piles balanced management system and balance control method, it includes：Each battery in the battery pack formed for multiple batteries of connecting carries out balance protection；Single-pole single-throw switch (SPST) makes the energy of battery pack charge by corresponding transformer with the constant current of corresponding constant flow module control to the battery when the control signal exported according to the balance controller for corresponding to battery pack is closed；With the double-pole single throw of corresponding cell parallel, also it is connected with a double-point double-throw switch corresponding to battery pack, and when being closed according to the control signal of balance controller output, it is attached with the selected constant-current source of double-point double-throw switch or Constant Current Load of closure, the supplement of constant current carries out respective battery by the constant-current source for corresponding to battery pack or carries out the balanced discharge of constant current to respective battery by corresponding to the Constant Current Load of battery pack.The present invention can effectively improve the uniformity of battery pack, meet the application demand of the large scale systems such as energy-accumulating power station.
Description
Technical field
The present invention relates to field of power, more particularly to a kind of Li-ion batteries piles balanced management system and Balance route
Method.
Background technology
Wind-power electricity generation is one of important composition for realizing China's energy and the electric power strategy of sustainable development.Since wind-powered electricity generation exports
Power has very strong fluctuation, randomness, and forecasting wind speed, there are certain error, large-scale wind power is grid-connected can be to power train
The safe and stable operation of system brings a series of technical barrier.Therefore, in order to more efficiently utilize regenerative resource, provided in wind energy
Source is than in more rich environment, the general wind storage complementary system that builds generates electricity, using energy storage technology to wind turbine unit output work
Rate is regulated and controled, and makes wind power plant maximizing the benefits, to improve wind farm grid-connected service ability, improve system power supply continuity,
Stability and reliability.
Existing power storage mode, mainly there is physics energy storage, Power Flow（Such as superconducting magnetic energy storage）It is stored up with battery
It can three categories.Wherein, battery energy storage mainly includes accumulator, capacitor and fuel cell etc..But due to ultracapacitor, combustion
Material battery makes it not be suitable for extensive electric power storage occasion in the limitation of capacitance of storage and price etc..Therefore, it is extensive at present
Electric power storage mainly uses accumulator.Wherein, lead-acid accumulator, lead-acid battery are the electric power storage technologies of comparative maturity, though it is low with price
Honest and clean, the advantages of security performance is relatively reliable, but there are still cycle life it is shorter, can not deep discharge, its capacity and the work(of electric discharge
The shortcomings of rate is closely related, operation and maintenance cost is high, it is difficult to meet the requirement of extensive electric power storage development.The technology door of sodium-sulphur battery
Sill are higher, the severe corrosive of positive and negative electrode active material, and the requirement to battery material, battery structure and service condition is harsh, and
There are severe compromises when short-circuit；The charging and discharging state of the battery（SOC）It cannot accurate on-line measurement；Additional heat supply is needed to set
It is standby to maintain running temperature, cause to start the time long, it is impossible to adapt to summer wind-force generation assets it is bad when, it is necessary between energy-storage system
The startup requirement of having a rest property operation.
Lithium ion battery obtains important breakthrough, commercial application in security, energy conversion efficiency and economy etc.
Condition reach its maturity, it is considered to be one of Main way of following energy storage technology development.However, in order to adapt to energy-accumulating power station etc.
The application demand of large scale system forms battery pack, due to each factory after substantial amounts of single battery usually is carried out connection in series-parallel
Positive and negative electrode material, the quality of electrolyte and the technique that family uses are different, understand some differences in performance.It is such as same
Model（The normal cell of same encapsulation）, the capacity of battery has bigger difference（10%~20%）.Thus, how to make battery pack
In any one or more battery units carry out equalizaing charges, realize flexibly control, euqalizing current is constant, to improve battery pack
Uniformity is a problem of current urgent need to resolve.
The content of the invention
It is an object of the invention to provide a kind of Li-ion batteries piles balanced management system and balance control method, Ke Yitong
The mode for crossing energy transfer carries out equalizaing charge to any one or more battery units in battery pack, and euqalizing current is constant, control
System is flexible, can effectively improve the uniformity of battery pack, meets the application demand of the large scale systems such as energy-accumulating power station.
In order to achieve the above object, a technical solution of the invention is to provide a kind of Li-ion batteries piles balanced management system
System, the system is provided with circuit of battery pack balancing, wherein including：Balance controller, energy transfer formula circuit；The energy
Transfer type circuit, further includes：Multiple transformers, multiple constant flow modules and multiple single-pole single-throw switch (SPST)s, respectively with battery pack
Multiple batteries of middle series connection are corresponding；
Wherein, the main coil of each transformer is connected with total charging and discharging circuit of battery pack；The by-pass of each transformer
Circle connects constant flow module and single-pole single-throw switch (SPST), and an and corresponding cell parallel；
The corresponding single-pole single-throw switch (SPST) of any one battery when the control signal that is exported according to balance controller is closed,
The energy of battery pack is made to charge by corresponding transformer with the constant current of corresponding constant flow module control to the battery.
Preferably, the circuit of battery pack balancing is additionally provided with energy compensation type circuit, wherein further including：One perseverance
Liu Yuan, a Constant Current Load, a double-point double-throw switch and with the corresponding multiple double-pole lists of each battery in battery pack
Throw switch；
Wherein, the control signal that the double-point double-throw switch is exported according to balance controller is selected by constant-current source or by perseverance
One in current load is connected with each double-pole single throw；
Any one double-pole single throw and corresponding cell parallel, in the control letter exported according to balance controller
Number be closed when, corresponding battery is connected with constant-current source or by Constant Current Load, by constant-current source to the battery progress constant current
Supplement or by Constant Current Load to the battery carry out constant current balanced discharge.
Preferably, arbitrary cluster battery, multiple battery modules comprising series connection, each battery module include the multiple of series connection
Battery；
The system is provided with the equal balance system of case, wherein further including：
Case equilibrium power supply provides euqalizing current for this cluster battery, and is connected with AC network；
Battery pack control module is connected by the first CAN bus power supply balanced with the case, is provided and is driven the case balanced
Power supply obtains control signal of the energy to respective battery modules equalizaing charge；
Multiple battery monitoring modules, it is corresponding with multiple battery modules respectively, and respectively by the second CAN bus with it is described
Battery pack control module connection interacts.
Preferably, the battery monitoring module is arranged in the battery case of corresponding battery module, gathers the battery
The information of module.
Another technical solution of the present invention is to provide a kind of Li-ion batteries piles balanced management method, it includes：
Data prediction is carried out to the battery data for inputting battery pack equilibrium management system；
Each battery in the battery pack formed for multiple batteries of connecting is provided with corresponding balanced realization unit and carries out
Weighing apparatus protection；
Be equipped with transformer in the balanced realization unit, secondary coil by constant flow module and single-pole single-throw switch (SPST) with it is corresponding
Cell parallel, main coil are connected with total charging and discharging circuit of battery pack；The single-pole single-throw switch (SPST) is according to corresponding to battery
When the control signal of the balance controller output of group is closed, make the energy of battery pack by corresponding transformer, with corresponding
The constant current of constant flow module control charges to the battery；
The double-pole single throw with corresponding cell parallel is additionally provided in the balanced realization unit, also with corresponding to battery
The double-point double-throw switch connection of group, and when the control signal exported according to balance controller is closed, it is double with the double-pole of closure
The selected constant-current source of throw switch or Constant Current Load are attached, and respective battery is carried out by the constant-current source for corresponding to battery pack
The supplement of constant current or the balanced discharge for carrying out constant current to respective battery by corresponding to the Constant Current Load of battery pack.
Preferably, when system is arranged to automatic equalization mode, by the closure for controlling respective switch in balanced realization unit
Or disconnect, a pair battery corresponding with the balanced realization unit carries out equalization discharge, balanced or charge balancing the operation of open circuit；
When system is arranged to non-automatic balanced mode, the charge and discharge balancing state of each battery is issued.
Preferably, arbitrary cluster battery, multiple battery modules comprising series connection, each battery module include the multiple of series connection
Battery；The equal balance system of a corresponding case is configured with for cluster battery；
In the equal balance system of case, multiple battery monitoring modules gather the information of corresponding multiple battery modules respectively, and
Battery pack control module is sent to by the second CAN bus；
Judge that wherein energy is less than other behindhand battery modules, and pass through the first CAN by the battery pack control module
Bus sends control signal to case equilibrium power supply, and the case equilibrium power supply is made to obtain energy from AC network and is sent to behindhand battery mould
Block carries out equalizaing charge.
Preferably, when carrying out equalization discharge test, procedure below is included：
It is fully charged to entire battery pack using charger, and each battery is carried out by lithium battery monomer maintained equipment
After adjustment is to ensure that it is each full of, capacity is adjusted to some of batteries by tunable load module at random respectively, makes it
Bleed off portion capacity；
Whole group 0.5C electric discharges are carried out by tunable load module, close battery pack equilibrium management system, record battery pack is put
The data in electric stage simultaneously draw the first discharge curve；
It is charged to entire battery pack using charger, stopped when any one battery is full of wherein；
Whole group 0.5C electric discharges are carried out by tunable load module, open battery pack equilibrium management system, record battery pack is put
The data in electric stage simultaneously draw the second discharge curve；
Compare the first discharge curve and the second discharge curve, and judge the balanced journey of each battery discharge in the second discharge curve
Degree.
Preferably, when carrying out charge balancing test, procedure below is included：
On the basis of equalization discharge test, entire battery pack is discharged by tunable load module, and passes through lithium
After battery cell maintained equipment is adjusted to ensure that it is each vented to each battery, pass through tunable load module pair respectively
Some of batteries adjust capacity at random, it is made to be charged into portion capacity；
0.5C chargings are carried out to entire battery pack using charger, battery pack equilibrium management system is closed, records battery pack
The data of charging stage simultaneously draw the first charging curve；
By tunable load module to entire battery power discharge, stop when any one battery is vented wherein；
0.5C chargings are carried out to entire battery pack using charger, battery pack equilibrium management system is opened, records battery pack
The data of charging stage simultaneously draw the second charging curve；
Compare the first charging curve and the second charging curve, and judge the balanced journey that each battery charges in the second charging curve
Degree.
Compared with prior art, Li-ion batteries piles balanced management system and balance control method provided by the invention, can
To carry out single battery balanced management, case equilibrium and cluster balanced management, and provide effective portfolio effect means of testing, Neng Gougai
The uniformity of kind battery pack meets the application demand of the large scale systems such as energy-accumulating power station.
Description of the drawings
Fig. 1 is the electrical block diagram of heretofore described circuit of battery pack balancing；
Fig. 2 is the flow diagram of heretofore described balance control method；
Fig. 3 is the schematic diagram of heretofore described balanced realization unit；
The original discharge curve of equal balance system is not added when Fig. 4 is the battery power discharge stage in the present invention；
The discharge curve after equal balance system is used when Fig. 5 is the battery power discharge stage in the present invention；
The original charging curve of equal balance system is not added when Fig. 6 is the battery pack charging stage in the present invention；
The charging curve after equal balance system is used when Fig. 7 is the battery pack charging stage in the present invention；
Fig. 8 is the configuration diagram of the equal balance system of raising middle flask of the present invention.
Specific embodiment
The present invention is by circuit of battery pack balancing, any one list in the battery pack formed to multiple single batteries of connecting
Body battery carries out equalizaing charge or the balanced discharge of larger euqalizing current, to improve the uniformity of battery pack, meets energy storage electricity
The application demand for the large scale systems such as stand.In preferred example, LiFePO is used4As the ferric phosphate lithium cell of anode, there is peace
The advantages that good perfection has extended cycle life, and specific energy is high, and memory-less effect is easy to maintain, production process green non-pollution.
As shown in Figure 1, the circuit of battery pack balancing, comprising：Balance controller U, energy transfer formula circuit and energy are mended
Repay formula circuit.Wherein, the energy transfer formula circuit, comprising：N number of transformer T1 ~ Tn, N number of constant flow module and N number of hilted broadsword list
Throw switch KB1 ~ KBn.The total charging and discharging circuit of battery pack is connected with the main coil of N number of transformer, the secondary coil of N number of transformer with it is each
A single battery B1 ~ Bn is in parallel.
The balance controller U passes through energy transfer between switch controlling signal realization battery.Assuming that need to battery B1,
When B3 shifts energy, balance controller U outputs signal KB1, KB3 carry out the commutating circuit of turn-on battery B1, B3, at this moment whole group battery
Energy with constant current B1, B3 is given to charge by transformer T1, T3, the constant euqalizing current on cell circuit passes through constant current mould
Block controls.
The energy compensation type circuit, comprising：1 constant-current source VS, 1 Constant Current Load R, 1 double-point double-throw switch KC
With N number of double-pole single throw KA1 ~ KAn.N number of double-pole single throw KA1 ~ KAn corresponds in parallel with each single battery B1 ~ Bn；It is logical
Double-point double-throw switch KC is crossed to be connected one in constant-current source VS or Constant Current Load R with double-pole single throw KA1 ~ KAn.When certain section
The energy of battery and whole group battery difference is too big, it is impossible to when being realized in a short time by way of energy transfer, it is necessary to use
To energy compensation type circuit.
Assuming that battery B2 is more much lower than the energy of other batteries, pass through balance controller U closure switch KA2；Because it opens
KC default connection constant-current source VS are closed, so at this moment carrying out the supplement of constant current to battery B2 by constant-current source VS.Assuming that battery B3
It is higher than the energy of other batteries very much, switch KC is got at Constant Current Load R first, then by closure switch KA3, thus
The balanced discharge of constant current can be carried out to battery B3 by Constant Current Load R.
As shown in Fig. 2, the present invention provides a kind of Li-ion batteries piles balance control method, single battery equalizer line is being carried out
During reason, data prediction first is carried out to battery pack equilibrium management system input battery data, includes gathered data and basic ginseng
Number.
Wherein, gathered data includes：Electric current, monomer battery voltage, single battery temperature.Basic parameter includes：Battery section
Number, nominal capacity, balanced mark（For reading different characteristics）, single battery SOH（Health status）, single battery
SOC（State-of-charge）, euqalizing current, time for balance, monomer lower threshold, monomer upper limit threshold, balance policy change it is static when
Between, state duration, time for balance, balanced duration, single battery state are set（The equilibrium of predominantly each single battery
State）, whole group battery status（Mainly include charging and discharging state, open-circuit condition）, electric voltage equalization and capacity equilibrium charge threshold
The open circuit threshold value table of the discharge threshold table of table, electric voltage equalization and capacity equilibrium, electric voltage equalization and capacity equilibrium.
According to the equilibrium state of balanced rule output, by the balanced realization unit set（Fig. 3）To corresponding single battery
Implement balance protection.Balanced realization is using efficient lossless charging modes, and its charging current can be wanted according to balanced rule
It asks and is adjusted, euqalizing current >=6A, and can realize point-to-point equilibrium.Balanced realization unit can be by Balance route in Fig. 1
The part of each battery is corresponded in the energy transfer formula circuit of device control or energy compensation type circuit.If battery pack equilibrium management
Default is automatic equalization mode, then is advised after condition adjudgement according to equalization discharge rule, the balanced rule of open circuit, charge balancing
Respective handling is then carried out, corresponding switch is controlled to be closed or disconnected；If non-automatic balanced mode, then each battery is issued
Charge and discharge balancing state.
In order to test portfolio effect, in example using 24 series connection 20Ah lithium batteries formed a battery pack as
Test object using 0.5C charge and discharge, is charged to charger after group end sets voltage and drops electric current automatically.Wherein, using following
Test equipment, comprising：Charger TCCH-H96V-50A, for charging；The FZMK of Gao Te companies, you can adjust load blocks, be used for
Electric discharge；The ESBMM of Gao Te companies, i.e. battery monitoring module test for equilibrium（2~5A of euqalizing current）, voltage monitoring；Gao Te
The lithium battery monomer maintained equipment of company, for the single battery adjustment in balanced test process.
The test method includes equalization discharge test and charge balancing test：
In equalization discharge test, procedure below is included：
It is S1-1, fully charged to entire battery pack（And adjustment is carried out to single battery and has ensured that often section is filled with）Afterwards, divide
It is other that capacity is adjusted at random to wherein 4 batteries（It is made to bleed off portion capacity）；
S1-2, whole group 0.5C electric discharges are carried out, closes balanced, record data, when being illustrated in figure 4 the battery power discharge stage not
Add the original discharge curve of equal balance system；
S1-3, charge to battery pack whole group, monomer is by stopping（Stop when any one battery is full of wherein）；
S1-4, whole group 0.5C electric discharges are carried out, opens equilibrium, recorded data, make when being illustrated in figure 5 the battery power discharge stage
With the discharge curve after equal balance system.
In charge balancing test, procedure below is included：
S2-1, equalization discharge test on the basis of, battery pack whole group is discharged（And single battery is adjusted
Whole guarantee, which often saves, to be all vented）Afterwards, capacity is adjusted at random to wherein 4 batteries respectively（It is made to be charged into portion capacity）；
2nd, whole group 0.5C chargings are carried out, close equilibrium, data is recorded, does not add when being illustrated in figure 6 the battery pack charging stage
The original charging curve of equal balance system；
3rd, discharge battery pack whole group, monomer is by stopping（Stop when any one battery is vented wherein）；
4th, whole group 0.5C chargings are carried out, open equilibrium, data is recorded, is used when being illustrated in figure 7 the battery pack charging stage
Charging curve after equal balance system.
Comparison chart 4 and Fig. 5, Fig. 6 and Fig. 7, it is seen that each in charge and discharge process after having used battery management system balanced management
The uniformity of single battery greatly improves, and battery pack has obtained efficient balance.
In addition, case equilibrium and cluster balanced management are also carried out by battery management system in the present invention, to solve ring between battery
The problem of stream.Due to inverter technology, battery pack can not be prevented very well in current large capacity energy-storage system（Or
Cluster）The circuit of circulation so in order to avoid battery pack system or the inside circulation of battery cluster system, can permit cost at some
Perhaps occasion, which introduces battery case equalizing equipment or battery cluster equalizing equipment, this two classes equalizing equipment, can effectively reduce battery cluster
The scope that circulation allows to system.Common energy-storage system generally can be all considered from cost and setting angle from wherein selecting one
It plants, prevents the circulation of energy-storage system in this example using battery case equalizing equipment.
The framework of the equal balance system of case is as shown in figure 8, in large capacity energy-storage system, due to every cluster（Or string）Battery is all
It is made of more than 192~350 single battery series windings, these batteries can be divided into several battery modules, general each battery mould
Block can be made of 12 or 24 battery series windings.Battery in the long-term use, due to individual difference can cause each electricity
The total voltage of pond module may be inconsistent, and the monomer in battery module is balanced（Circuit of battery pack balancing as described above）, only
It can will be in oneself module（In case）All monomers be balanced to unanimously, the uniformity between module can not ensure, PCS（Energy turns
Change system）During whole cluster battery charge or discharge, the charging current of each module is duplicate, is thus easy to make
It overcharges or crosses into some modules and put, some module charge less or owe to put.
For this purpose, battery case equalizing equipment is introduced in the present invention（Or battery module equalizing equipment）；Per cluster（Or string）Battery pack
Containing 8~20 BMS（Battery management system）Subsystem（Each management subsystem 12 saves or 24 section monomers）；Each BMS subsystems
Run relatively independent, cluster battery is by lithium battery a 45V or 90V/（3A~6A）Case equilibrium power supply provide euqalizing current, by
ESGU（Battery pack control module）Should be battery balanced to which case by CAN1 bus marcos power supply, balance policy is united by ESGU
One computing and control, in order to save cost, the equilibrium of battery case is realized by switching mode, cluster（Or string）Battery has pair
The casing balancer answered.
In the example of Fig. 8, ESBMM（Battery monitoring module）Can on-line checking often economize on electricity cell voltage, temperature；It realizes to electricity
Pressure, the Realtime Alerts of temperature over-range；Onsite alarming, the output of dry node is closed, it can be achieved that far-end computer alarms and shows alarm
Content；There is the online active non-dissipative equalizing of battery pack, can by single battery line current charge, electric discharge, improve electricity
Pond group uniformity, delays battery failure.
The ESBMM is fixed in each battery case, and the information of the detections such as voltage, electric current, temperature, SOC passes through
CAN2 buses are interacted with ESGU；Case equilibrium power supply obtains energy from AC network and carries out equalizaing charge to behindhand battery case,
Case equilibrium power supply is communicated by CAN1 and ESGU, and is controlled by ESGU.
The ESGU is mainly that the operation information of whole group battery is collected, and gathers the total voltage and electric current of whole group battery, right
The exception that battery pack occurs is alarmed and protected；Battery pack can be protected according to the requirement of safe handling rule, it is ensured that
The safe and stable operation of battery system, when battery severe overvoltage, under-voltage, overcurrent（Short circuit）, electric leakage（Insulation）Wait abnormal failures feelings
When condition occurs, energy-storage system administrative unit sends order to the unit, cut-offfing for control whole group battery, battery is avoided to be overcharged,
It crosses and puts and overcurrent.
In conclusion Li-ion batteries piles balanced management system provided by the invention and balance control method, can carry out
Single battery balanced management, case equilibrium and cluster balanced management, and effective portfolio effect means of testing is provided, battery can be improved
The uniformity of group meets the application demand of the large scale systems such as energy-accumulating power station.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of Li-ion batteries piles balanced management system, which is characterized in that
The system is provided with circuit of battery pack balancing, wherein including：Balance controller, energy transfer formula circuit；The energy
Transfer type circuit is measured, is further included：Multiple transformers, multiple constant flow modules and multiple single-pole single-throw switch (SPST)s, respectively with battery
The multiple batteries connected in group are corresponding；
Wherein, the main coil of each transformer is connected with total charging and discharging circuit of battery pack；The secondary coil of each transformer, even
Connect constant flow module and single-pole single-throw switch (SPST), and an and corresponding cell parallel；
The corresponding single-pole single-throw switch (SPST) of any one battery makes electricity when the control signal exported according to balance controller is closed
The energy of pond group passes through corresponding transformer, is charged with the constant current of corresponding constant flow module control to the battery；
The circuit of battery pack balancing is additionally provided with energy compensation type circuit, wherein further including：One constant-current source, a perseverance
Current load, a double-point double-throw switch and with the corresponding multiple double-pole single throws of each battery in battery pack；
Wherein, the control signal that the double-point double-throw switch is exported according to balance controller selects to bear by constant-current source or by constant current
One in load is connected with each double-pole single throw；
Any one double-pole single throw and corresponding cell parallel, are closed in the control signal exported according to balance controller
During conjunction, corresponding battery with constant-current source or by Constant Current Load is connected, carries out the benefit of constant current to the battery by constant-current source
Fill or the battery carried out by Constant Current Load the balanced discharge of constant current；
The balanced discharge, comprising：There is the random capacity and other being not filled in some of batteries of entire battery pack
When battery is full of, by the way that tunable load module is set to carry out whole group 0.5C electric discharges, to be closed in battery pack equilibrium management system
Under state, record the data in battery power discharge stage and draw the first discharge curve；And in the wherein arbitrary of entire battery pack
Stop charging when one battery is full of, and pass through tunable load module and carry out whole group 0.5C electric discharges, so as in battery pack balancing pipe
It under reason system opening, records the data in battery power discharge stage and draws the second discharge curve, for bent with the first electric discharge
Line compares.
2. Li-ion batteries piles balanced management system as described in claim 1, which is characterized in that
Charging to battery pack, comprising：Some of batteries in entire battery pack have the random capacity and its not being vented
During his battery emptying, 0.5C chargings are carried out to entire battery pack, under battery pack equilibrium management system closed state, to record
The data of battery pack charging stage simultaneously draw the first charging curve；And it is put in wherein any one battery of entire battery pack
Stop electric discharge when empty, and 0.5C chargings are carried out to entire battery pack, under battery pack equilibrium management system opening, to remember
It records the data of battery pack charging stage and draws the second charging curve, for compared with the first charging curve.
3. Li-ion batteries piles balanced management system as described in claim 1, which is characterized in that
Arbitrary cluster battery, multiple battery modules comprising series connection, each battery module include multiple batteries of series connection；
The system is provided with the equal balance system of case, wherein further including：
Case equilibrium power supply provides euqalizing current for this cluster battery, and is connected with AC network；
Battery pack control module is connected by the first CAN bus power supply balanced with the case, provides and drive the case equilibrium power supply
Obtain control signal of the energy to respective battery modules equalizaing charge；
Multiple battery monitoring modules, it is corresponding with multiple battery modules respectively, and pass through the second CAN bus and the battery respectively
Group control module connection interacts.
4. Li-ion batteries piles balanced management system as claimed in claim 3, which is characterized in that
The battery monitoring module is arranged in the battery case of corresponding battery module, gathers the information of the battery module.
5. a kind of Li-ion batteries piles balance control method, which is characterized in that include：
Data prediction is carried out to the battery data for inputting battery pack equilibrium management system；
Each battery in the battery pack formed for multiple batteries of connecting is provided with corresponding balanced realization unit and carries out balanced guarantor
Shield；
Transformer is equipped in the balanced realization unit, secondary coil passes through constant flow module and single-pole single-throw switch (SPST) and corresponding battery
Parallel connection, main coil are connected with total charging and discharging circuit of battery pack；The single-pole single-throw switch (SPST) is according to corresponding to battery pack
When the control signal of balance controller output is closed, make the energy of battery pack by corresponding transformer, with corresponding constant current
The constant current of module control charges to the battery；
The double-pole single throw with corresponding cell parallel is additionally provided in the balanced realization unit, also with corresponding to battery pack
The connection of one double-point double-throw switch, and when the control signal exported according to balance controller is closed, opened with the double-pole double throw of closure
It closes selected constant-current source or Constant Current Load is attached, respective battery is carried out by the constant-current source for corresponding to battery pack constant
The supplement of electric current or the balanced discharge for carrying out constant current to respective battery by corresponding to the Constant Current Load of battery pack；
Wherein, when carrying out equalization discharge test, procedure below is included：
It is fully charged to entire battery pack using charger, and each battery is adjusted by lithium battery monomer maintained equipment
After ensureing that it is each full of, capacity is adjusted to some of batteries by tunable load module at random respectively, bleeds off it
Portion capacity；
Whole group 0.5C electric discharges are carried out by tunable load module, close battery pack equilibrium management system, record battery power discharge rank
The data of section simultaneously draw the first discharge curve；
It is charged to entire battery pack using charger, stopped when any one battery is full of wherein；
Whole group 0.5C electric discharges are carried out by tunable load module, open battery pack equilibrium management system, record battery power discharge rank
The data of section simultaneously draw the second discharge curve；
Compare the first discharge curve and the second discharge curve, and judge the balance degree of each battery discharge in the second discharge curve.
6. Li-ion batteries piles balance control method as claimed in claim 5, which is characterized in that
When system is arranged to automatic equalization mode, by controlling the closure of respective switch or disconnection in balanced realization unit, pair with
The corresponding battery of the balanced realization unit carries out equalization discharge, open circuit equilibrium or the operation of charge balancing；
When system is arranged to non-automatic balanced mode, the charge and discharge balancing state of each battery is issued.
7. Li-ion batteries piles balance control method as claimed in claim 5, which is characterized in that
Arbitrary cluster battery, multiple battery modules comprising series connection, each battery module include multiple batteries of series connection；For cluster
Battery is configured with the equal balance system of a corresponding case；
In the equal balance system of case, multiple battery monitoring modules gather the information of corresponding multiple battery modules respectively, and pass through
Second CAN bus is sent to battery pack control module；
Judge that wherein energy is less than other behindhand battery modules, and pass through the first CAN bus by the battery pack control module
To case equilibrium power supply send control signal, make the case equilibrium power supply from AC network obtain energy be sent to behindhand battery module into
Row equalizaing charge.
8. Li-ion batteries piles balance control method as claimed in claim 5, which is characterized in that
When carrying out charge balancing test, procedure below is included：
On the basis of equalization discharge test, entire battery pack is discharged by tunable load module, and passes through lithium battery
After monomer maintained equipment is adjusted to ensure that it is each vented to each battery, respectively by tunable load module to wherein
Some batteries adjust capacity at random, it is made to be charged into portion capacity；
0.5C chargings are carried out to entire battery pack using charger, close battery pack equilibrium management system, record battery pack charges
The data in stage simultaneously draw the first charging curve；
By tunable load module to entire battery power discharge, stop when any one battery is vented wherein；
0.5C chargings are carried out to entire battery pack using charger, open battery pack equilibrium management system, record battery pack charges
The data in stage simultaneously draw the second charging curve；
Compare the first charging curve and the second charging curve, and judge the balance degree that each battery charges in the second charging curve.
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| CN205039569U (en) * | 2015-09-02 | 2016-02-17 | 国网上海市电力公司 | Lithium ion battery organizes balanced management system |
| KR20180069628A (en) * | 2016-12-15 | 2018-06-25 | 현대자동차주식회사 | Battery system and method for controlling the same |
| EP3373407B1 (en) * | 2017-03-10 | 2020-02-12 | VARTA Microbattery GmbH | Method for operating a modular battery storage system, modular battery storage system and battery management system therefor |
| CN106849262A (en) * | 2017-03-20 | 2017-06-13 | 巢湖学院 | Battery set charge/discharge balancing equipment |
| CN106849266B (en) * | 2017-03-28 | 2018-03-27 | 合肥工业大学 | A kind of equalizing circuit for charging and discharging lithium battery energy management |
| CN107672475B (en) * | 2017-11-02 | 2021-11-23 | 蔚来(安徽)控股有限公司 | Charging connector, charging device, kit and charging method |
| TWI630402B (en) * | 2017-11-03 | 2018-07-21 | 致茂電子股份有限公司 | Battery testing apparatus and battery testing method |
| CN109301363A (en) * | 2018-08-30 | 2019-02-01 | 上汽通用汽车有限公司 | Battery pack management system, method and storage medium |
| CN109274149A (en) * | 2018-09-30 | 2019-01-25 | 北京朗正智能科技有限公司 | Electric flux switching equipment, cell apparatus and battery maintenance system |
| CN109755996A (en) * | 2018-12-14 | 2019-05-14 | 东莞钜威动力技术有限公司 | Mixed equilibrium circuit and daisy chain communicate the battery balanced control device of mixed equilibrium |
| CN109980728A (en) * | 2019-03-30 | 2019-07-05 | 苏州宇量电池有限公司 | A kind of electric quantity equalizing system and method for Li-ion batteries piles |
| CN110091880B (en) * | 2019-05-23 | 2020-05-22 | 湘潭牵引机车厂有限公司 | Power management system of tunnel engineering electric locomotive based on super capacitor |
| CN110654266B (en) * | 2019-09-24 | 2021-02-12 | 苏州众智新能源科技有限公司 | Lithium battery and lead-acid battery parallel system for new energy automobile and control method |
| WO2021189419A1 (en) * | 2020-03-27 | 2021-09-30 | 华为技术有限公司 | Method for estimating state of health of battery, battery management device, and battery management system |
| CN111469713B (en) * | 2020-04-28 | 2021-11-12 | 东风汽车集团有限公司 | Passive equalization control method for new energy automobile power battery |
| CN112858939A (en) * | 2021-01-27 | 2021-05-28 | 东莞市谦顺电子科技有限公司 | Safe intelligent starting power supply with lead-acid storage battery detection function |
| CN116647003B (en) * | 2023-04-14 | 2024-04-05 | 云储新能源科技有限公司 | Full direct current power supply method and system for data center |
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| CN203589787U (en) * | 2013-11-19 | 2014-05-07 | 杭州高特新能源技术有限公司 | Equalization circuit for lithium battery pack |
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