CN108258748A - Power-on control method and system for battery cabinet - Google Patents
Power-on control method and system for battery cabinet Download PDFInfo
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- CN108258748A CN108258748A CN201611246057.5A CN201611246057A CN108258748A CN 108258748 A CN108258748 A CN 108258748A CN 201611246057 A CN201611246057 A CN 201611246057A CN 108258748 A CN108258748 A CN 108258748A
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- battery
- battery cupboard
- group
- busbar
- cupboard
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a power-on control method of a battery cabinet for charging and discharging a lithium ion battery, which is characterized by comprising the following steps of: a. acquiring voltage values of battery cabinets to be electrified; b. grouping the battery cabinets with the voltage difference smaller than a preset threshold value of 20-40V in a mode of grouping the battery cabinets; c. controlling the voltage difference between each battery cabinet group and the busbar according to a voltage-sharing mode, and sequentially connecting the battery cabinet group with the minimum difference between the average voltage of each battery cabinet group and the voltage of the busbar to the busbar; d. and simultaneously charging and discharging the battery cabinets after the bus bar is accessed.
Description
Technical field
The present invention relates to technical field of lithium ion more particularly to a kind of battery cupboards to lithium ion battery charging
Electrification control method and system.
Background technology
Lithium battery energy density height, single battery core voltage height, long lifespan, memory-less effect, it is pollution-free, therefore using lithium electricity
Pond power supply is the development trend of battery applications.In high-power applications, it is necessary first to lithium ion single battery core be composed in series lithium from
Sub- battery pack improves supply voltage, and then Li-ion batteries piles are in parallel again improves the output power of power supply.Lithium ion single
Li-ion batteries piles after battery core and series connection are required for the battery cupboard controller monitoring management for including relay.Li-ion batteries piles
Battery cupboard is collectively constituted with battery cabinet controller.
Since the voltage of battery cupboard is inconsistent when general multiple batteries in parallel connection cabinet high pressures power on, when in parallel due to electric current too
Greatly, cause relay that cannot be closed, may cause all battery cupboards that can not power on.When multiple battery cupboard voltage differences are larger, such as
Fruit forces parallel connection due to the internal resistance very little of Li-ion batteries piles in battery cupboard so that electric current moment increases, so as to lead to battery
The circuit damage of cabinet controller or even the damage of entire battery cupboard control system.The prior art is generally individually given using PCS thus
The low battery cupboard of voltage charges, and is powered on again until all battery cupboard voltages are consistent, but this needs manually to control
System, it is impossible to which automatic to carry out, bringing human cost increase and maintenance cost increases, and power-on time is long, causes to power on effect
Rate is low.
Invention content
The embodiment of the present invention provides the electrification control method and system of a kind of battery cupboard to lithium ion battery charging, energy
It is enough to be powered on automatically, electrical efficiency in raising.
A kind of electrification control method of battery cupboard, for charging to lithium ion battery, including step：A. each battery cupboard is obtained
Voltage value；B., voltage difference is divided into one group of mode to be grouped each battery cupboard less than the battery cupboard of predetermined threshold value；
C. the battery cupboard group of the difference minimum in each battery cupboard group between average voltage and busbar voltage is sequentially ingressed into busbar；D. simultaneously
To each battery cupboard charge and discharge after access busbar, each battery cupboard is carried out when the voltage of each battery cupboard is equal or close
Electric control.
A kind of charge-discharge control system of battery cupboard, including：Multiple battery cupboards and control cabinet, the control cabinet, are configured
To obtain the voltage value of each battery cupboard that need to be powered on, and the voltage value of each battery cupboard is compared, the predetermined threshold value that voltage difference is less than
Battery cupboard be divided into one group of mode each battery cupboard be grouped, average voltage in each battery cupboard group and busbar voltage
Between the battery cupboard group of difference minimum be sequentially ingressed into busbar, while to each battery cupboard charge and discharge after access busbar.
Compared with prior art, the battery cupboard provided in an embodiment of the present invention to lithium ion battery charge and discharge is upper automatically controlled
Method and system processed is grouped all battery cupboards that powers on, be grouped according to pressure difference be less than 20V~40V be one group, and according to
Every group of multiple battery cupboard average voltages are powered on according to being grouped from small to large.It is powered on by being grouped battery cupboard group one by one,
Battery cupboard is to power on simultaneously in battery cupboard group each in this way so that power-on time shortens, and upper electrical efficiency is improved.Multiple batteries
Cabinet high-voltage parallel powers on scheme and can not need to manually be judged, in this way in the condition for not increasing hardware cost with remote control
Under, reduce human cost.
Description of the drawings
From below in conjunction with the accompanying drawings to the present invention specific embodiment description in the present invention may be better understood,
In：
The detailed description made referring to the drawings to non-limiting example by reading, other feature of the invention,
Objects and advantages will become more apparent upon, wherein, the same or similar reference numeral represents the same or similar feature.
Fig. 1 is the flow diagram of the electrification control method of the battery cupboard of embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of the charge-discharge control system for battery cupboard that embodiment of the present invention provides；
Fig. 3 is the battery cupboard of system shown in Figure 2 and the schematic diagram of control cabinet；
Fig. 4 is the schematic diagram of the access control cabinet mode of battery cupboard shown in Fig. 3；
Fig. 5 is that the schematic diagram of parallel way is pressed in the charging of the specific embodiment of the invention 1；
Fig. 6 is that the schematic diagram of parallel way is pressed in the charging of the specific embodiment of the invention 2；
Fig. 7 is that the schematic diagram of parallel way is pressed in the electric discharge of the specific embodiment of the invention 3；
Fig. 8 is that the schematic diagram of parallel way is pressed in the charge and discharge of the specific embodiment of the invention 4.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, it is proposed that many details, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case of some details in not needing to these details.Below to implementing
The description of example is used for the purpose of by showing that the example of the present invention is better understood from the present invention to provide.In attached drawing and following
Description in, at least part of known features and technology are not shown, unnecessary fuzzy to avoid causing the present invention；
Also, for clarity, it may be exaggerated the size of region or structure.Identical reference numeral represents same or like in figure
Structure, thus their detailed description will be omitted.In addition, feature described below, structure or characteristic can be with any
Suitable mode is incorporated in one or more embodiments.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to Fig. 1, the flow diagram of the electrification control method of battery cupboard for embodiment of the present invention.This embodiment party
The electrification control method for the battery cupboard that formula provides, for charging to lithium ion battery, including step：
The voltage value of each battery cupboard that S10, acquisition need to power on；
S20, battery cupboard of the voltage difference less than 20V~40V predetermined threshold values is divided into one group of mode to each battery cupboard
It is grouped；
S30, the voltage difference between each battery cupboard group and busbar is controlled, and successively each battery cupboard group according to pressure mode
The battery cupboard group access busbar of difference minimum between middle average voltage and busbar voltage；
S40, to access busbar after each battery cupboard simultaneously charge and discharge.
It is understood that in step S20, predetermined threshold value is preferably 30V.
Referring to Fig. 2, embodiment of the present invention also provides a kind of charge-discharge control system of battery cupboard, including multiple batteries
Cabinet and control cabinet, the control cabinet are configured as obtaining the voltage value of each battery cupboard that need to be powered on, and compare the electricity of each battery cupboard
The battery cupboard of predetermined threshold value of the voltage difference less than 20V~40V is divided into one group of mode and each battery cupboard is divided by pressure value
Group controls the voltage difference between each battery cupboard group and busbar, and successively electricity average in each battery cupboard group according to pressure mode
The battery cupboard group access busbar of difference minimum between pressure and busbar voltage, fills each battery cupboard after access busbar simultaneously
Electric discharge.
The charge-discharge control system of battery cupboard mainly includes battery cupboard 110, system power supply 130, load 140 and control cabinet
150.Battery cupboard 110, system power supply 130, load 140 and control cabinet 150 are gathered together by busbar 120.Battery cupboard 110 wraps
It includes Li-ion batteries piles 112 and includes the battery cabinet controller 114 of relay 116.Li-ion batteries piles 112 are a kind of storages
The device of electric energy is connected in series by single-unit battery core.According to the difference of application scenarios, the battery core of large capacity is directly connected, low capacity
Battery core can be first in parallel and then connect.Battery cabinet controller (BATTERY MANAGEMENT SYSTEM, BMS) 114, is one
The device of kind management Li-ion batteries piles 112, for detecting the voltage of Li-ion batteries piles 112 and single battery core, electric current, judges
The abnormal conditions of relay, the insulation status of battery cupboard etc. simultaneously make protection act, and manage and realized by relay 116.
BMS can be by the communication interfaces such as serial ports/network interface/CAN/ is wireless/dry node/intermodule communication and control cabinet 150 into row information
Interaction.In system of the embodiment of the present invention, battery cabinet controller 114 can receive the control of control cabinet 150, and execution, which is articulated to, is
The action of system power supply 130.
Control cabinet 150 be carry out data operation and signal analysis and Control processing device, can obtain each BMS voltage values,
Can comparing voltage value, can also be according to comparison result by the corresponding electricity of voltage value that scheduled rule of classification offers each BMS
Pond cabinet 110 such as is grouped at the analyzing and processing, press the operation of algorithm, detecting system relay whether fault-free and system it is exhausted
Edge state, the access of alarm data and the output function of alarm signal, and power up commands can be sent.Control cabinet 150 can be with
It is an independent component, can also be used as function module and be present in BMS.
System power supply 130 is a kind of supply unit of direct current output, and the communications field is generally 48V direct currents.Implement in invention
In mode, equipment of the system power supply 130 as charging to Li-ion batteries piles 112, while also give load 140 power supply.
Load 140 is the general designation of electrical equipment, consumes electric energy.
Busbar 120 is system power supply 130, battery cupboard 110, the convergent point for loading 140.
It is understood that Fig. 2 only lists the situation that ten battery cupboards carry out charge and discharge control, embodiment of the present invention
And the method and system of embodiment can theoretically support the parallel charge-discharge of unlimited number of battery cupboard to control.
The System Working Principle of embodiment of the present invention is as follows：During initial power-on, control cabinet 150 instructs each battery cupboard 110
Battery cabinet controller 114 disconnect relay 116 so that battery cupboard 110 does not access busbar 120, and by battery cabinet controller 114
The voltage value of battery cupboard 110 managed is reported to control cabinet 150 by communication interface, and control cabinet 150 is obtained according to reported result
The voltage value of each battery cupboard 110 when taking initial power-on；Control cabinet 150 carries out the voltage value of each battery cupboard 110 acquired
Compare, the mode for one group is divided to be grouped each battery cupboard 110 battery cupboard 110 of the voltage difference less than 20V~40V；
The voltage difference between each battery cupboard group and busbar 120 is controlled, and successively being averaged between busbar 120 according to pressure mode
The battery cupboard group access busbar 120 of voltage difference minimum, then to each battery cupboard group charge and discharge simultaneously after access busbar 120
Electricity.
It is understood that this so-called grouping and battery cupboard group access busbar are that present 120 memory of control cabinet contains
Such as battery cupboard 110 of the voltage difference less than 30V divides for the scheduled rule of classification such as one group, the one group of voltage value of reception of control cabinet 120
It is grouped according to the rule to prestore afterwards, and is carried out to same group of the same identifier that provides, and to its electric sequence
Sequence controls the battery cupboard of the battery cupboard 110 with identical identifier when same group of battery cupboard 110 is accessed busbar 120
Device 114, which sends out instruction, makes it be closed corresponding relay 116 to realize same group of each battery cupboard 110 while access busbar 120,
It can also adopt and realize same group of each battery cupboard 110 with other methods while access busbar 120.
Also referring to Fig. 3 and Fig. 4, by taking the charge and discharge for giving ten battery cupboards are controlled as an example, control cabinet and each battery
It communicates between cabinet, can be communicated between each battery cupboard, the voltage of existing ten battery cupboard 1# battery cupboards to 10# battery cupboards is distinguished
For 796V, 797V, 723V, 725V, 730V, 799V, 762V, 763V, 765V, 766V, can be learnt by comparing analysis：3#,
The voltage of such as battery cupboard is respectively 723V, 725V, 730V in 4# and 5#, and pressure difference is less than predetermined threshold value between three battery cupboards
30V, average voltage 726V；The voltage of 7#, 8#, 9# and 10# battery cupboard is respectively 762V, 763V, 765V, 766V, four electricity
Pressure difference is less than predetermined threshold value 30V, average voltage 764V between the cabinet of pond；The voltage of 1#, 2#, 6# battery cupboard is respectively 796V,
Pressure difference is less than predetermined threshold value 30V, average voltage 797V between 797V, 799V, three battery cupboards, then can by 3#, 4# and
5# point be one group, 7#, 8#, 9# and 10# point and is one group, 1#, 2#, 6# to divide be one group, if being ranked up according to average voltage level
3#, 4# and 5# are first battery cupboard group, and 7#, 8#, 9# and 10# are second battery cupboard group, and 1#, 2#, 6# is third battery
Cabinet group.Just by the 3# of first battery cupboard group if each battery cupboard by first battery cupboard group is needed to access busbar simultaneously,
The relay of 4# and 5# battery cupboards is closed at, and so on.
The electrification control method and system for the battery cupboard to lithium ion battery charge and discharge that embodiment of the present invention provides lead to
Crossing grouping, battery cupboard group is powered on one by one, and battery cupboard is to power on simultaneously in battery cupboard group each in this way so that power-on time contracts
Short, upper electrical efficiency is improved.Multiple battery cupboard high-voltage parallels power on scheme and can not need to manually be sentenced with remote control
It is disconnected, in this way under conditions of hardware cost is not increased, reduce human cost.Controlled by way of according to pressure each battery cupboard with
Voltage difference between busbar so that the voltage difference holding of each battery cupboard accesses parallel connection again in a certain range, to reduce battery
Voltage difference between cabinet avoids heavy current impact between battery cupboard, and BMS circuits are damaged so as to reduce, and improves battery cupboard simultaneously
Join the safety of charge and discharge.
Below using several specific examples, the electrification control method of battery cupboard is illustrated.
Specific embodiment 1, referring to Fig. 5, the electrification control method of battery cupboard provided in this embodiment, including following step
Suddenly.
S11, each battery cupboard group to not accessing busbar average voltage level be ranked up from low to high；
S21, according to ranking results, the minimum battery cupboard group access busbar of average voltage level is charged；
S31, when the voltage value of busbar rises to the average voltage level of next to the lowest battery cupboard group, it is high by described second
Battery cupboard group access busbar charges；
S41, and so on, until all battery cupboard groups all access busbar and charge.
System structure with reference to shown in Fig. 2 to 4 illustrates, and in initial power-on, system power supply 130 works, Suo You electricity
The relay 116 of pond cabinet 110 all disconnects so that battery cupboard 110 and busbar 120 are in the static condition for not filling and not putting, female at this time
The initial voltage value of row 120 is zero.Each BMS 114 detects its voltage value of battery cupboard 110 managed and is reported to control cabinet
150, by 150 more each battery cupboard 110 of control cabinet voltage value and be grouped, and using each battery cupboard group (such as Fig. 4, figure not
Mark) average voltage level give the sequence of battery cupboard group, pressure difference is less than predetermined threshold value 30V, flat between battery cupboard 110 as escribed above
Equal voltage is the first battery cupboard group of 726V, and pressure difference is less than predetermined threshold value 30V, average voltage is 764V's between battery cupboard 110
The third battery cupboard group that pressure difference is less than predetermined threshold value 30V between second battery cupboard group and battery cupboard 110, average voltage is 797V
Deng, the BMS114 of each battery cupboard 110 in the first battery cupboard group for first notifying average voltage minimum is linked on busbar 120, this
In the BMS114 of each battery cupboard 110 in so-called first battery cupboard group be linked on busbar 120 and refer to when needing first
Each battery cupboard 110 of battery cupboard group is accessed if busbar 120 simultaneously just by 3#, 4# and the 5# battery cupboard of first battery cupboard group
110 relay 116 is closed at accessing busbar 120.By system power supply 130 to each battery cupboard in the first battery cupboard group
110 charge, and when busbars voltage rises to the average voltage level of next to the lowest second battery cupboard group, reinform the second battery
The BMS114 of each battery cupboard 110 is linked on busbar 120 in cabinet group, by system power supply 130 to each battery in the second battery cupboard group
Cabinet 110 charges, and so on, until all battery cupboard groups, that is, all battery cupboards 110 are all linked on busbar 120.
It is understood that the step S11 is performed by control cabinet 150, control cabinet 150 can be to before step S21
The BMS114 of each battery cupboard 110 communicates to be ranked up result by the average voltage level of each battery cupboard group and is sent to from low to high
The BMS114 of each battery cupboard 110, before this control cabinet 150 can also detect the insulation status and system relay of whole system
The step of situation is detected, when detection structure for it is normal when just by the average voltage level of each battery cupboard group from low to high into
Row ranking results are sent to the BMS114 of each battery cupboard 110.
The step S21 is performed by the BMS114 of each battery cupboard 110, and the BMS114 of each battery cupboard 110 obtains control cabinet
Pressure power on instruction after can also be detected in the relay 116 of each battery cupboard 110 and battery cupboard 110 before step S21
Portion's insulation status etc. can just perform step S21 after detection structure is normal.
Further comprise detecting the voltage of busbar 120 and with second by control cabinet 150 between step S21 and step S31
The step of average voltage level of low battery cupboard group is compared.
Specific embodiment 2, referring to Fig. 6, the electrification control method of battery cupboard provided in this embodiment, including following step
Suddenly.
S12, each battery cupboard group to not accessing busbar average voltage level be ranked up from low to high for first, second
A to n-th battery cupboard group, wherein n are the integer more than 2；
S22, into first battery cupboard group, the battery cabinet controller transmission of each battery cupboard powers on instruction, each battery cupboard
Controller is connected to power on instruction after be closed corresponding relay, the access busbar for completing first battery cupboard group charges；
S32, into second battery cupboard group, the battery cabinet controller transmission condition of each battery cupboard powers on instruction, described
Battery cabinet controller is connected to power on instruction after, according to condition power on instruction judge the average voltage of second battery cupboard group with
Whether busbar voltage difference is less than threshold value, if it is not, then to the first battery cupboard group having already powered on charge to the
The average voltage and busbar voltage difference of two battery cupboard groups are less than after threshold value, each battery cupboard control of second battery cupboard group
Device processed is closed corresponding relay, and the access busbar for completing second battery cupboard group charges；
S42, and so on, until all battery cupboard groups all access busbar and charge.
Specific embodiment 2 and specific embodiment 1 are essentially identical the difference lies in step S32, perform step S32 when
It waits, into second battery cupboard group, the battery cabinet controller of each battery cupboard sends condition and powers on instruction so that battery cupboard control
Device processed is detected the average voltage of second battery cupboard group and whether busbar voltage difference is less than threshold value, which should be
20V~40V, preferably 30V, it is described when the average voltage and busbar voltage difference of second battery cupboard group are less than threshold value
The relay that each battery cabinet controller closed pair of second battery cupboard group is answered, complete second battery cupboard group access busbar into
Row charging；If it is not, then to the first battery cupboard group having already powered on charge to being averaged for second battery cupboard group
Voltage and busbar voltage difference are less than after threshold value, the relay that each battery cabinet controller closed pair of second battery cupboard group is answered
Device, the access busbar for completing second battery cupboard group charge.
Specific embodiment 3, referring to Fig. 7, the electrification control method of battery cupboard provided in this embodiment, including following step
Suddenly.
S13, each battery cupboard group to not accessing busbar average voltage level be ranked up from high to low；
S23, according to ranking results, the highest battery cupboard group access busbar of average voltage level is discharged；
S33, when the voltage value of busbar drops to the average voltage level of the second high battery cupboard group, it is high by described second
Battery cupboard group access busbar discharges；
S43, and so on, until all battery cupboard groups all access busbar.
The charging of the electric discharge of the present embodiment pressure parallel way and specific embodiment 1 presses parallel way essentially identical.Knot
It closes the system structure shown in Fig. 2 to 4 to illustrate, in initial power-on, system power supply 130 works, all battery cupboard BMS114
Relay 116 all disconnect so that battery cupboard 110 and busbar 120 be in the static condition for not filling and not putting, at this time busbar 120
Initial voltage value is zero.Each BMS114 detects its voltage value of battery cupboard 110 managed and is reported to control cabinet 150, by master control
The voltage value of 150 more each battery cupboard 110 of cabinet is simultaneously grouped, and gives battery cupboard group using the average voltage level of each battery cupboard group
Sort the first battery cupboard group that pressure difference between battery cupboard as escribed above is less than predetermined threshold value 30V, average voltage is 797V, battery
Pressure difference is less than predetermined threshold value 30V between cabinet, average voltage pressure difference between the second battery cupboard group of 764V and battery cupboard 110 is less than
Predetermined threshold value 30V, third battery cupboard group that average voltage is 726V etc., first notify in the highest first battery cupboard group of average voltage
The BMS of each battery cupboard be linked on busbar, be then turned off system power supply, each battery cupboard in the first battery cupboard group put
Electricity when busbars voltage drops to the average voltage level of second the second high battery cupboard group, reinforms each in the second battery cupboard group
The BMS of battery cupboard is linked on busbar, is disconnected system power supply and is discharged each battery cupboard of the second battery cupboard group, with such
It pushes away, until all battery cupboard groups, that is, all battery cupboards are all linked on busbar.Then system power supply 130 is then turned on to parallel connection
Each lithium electricity module carry out charge and discharge.
Specific embodiment 4, referring to Fig. 8, the electrification control method of battery cupboard provided in this embodiment, including following step
Suddenly.
S14, the ensemble average voltage value of the average voltage level for each battery cupboard group for not accessing busbar calculated；
S24, battery cupboard group of the average voltage level less than the ensemble average voltage value is sequentially ingressed into busbar from low to high
It charges, until the voltage value of busbar rises to the ensemble average voltage value；
S34, voltage value is sequentially ingressed into busbar progress from high to low higher than the battery cupboard group of the ensemble average voltage value
Electric discharge, until the voltage value of busbar drops to the ensemble average voltage value.
It is understood that above-mentioned steps S24 and step S34 can be carried out at the same time, can also appoint without certain order requirement
One step first carries out.
It is still illustrated with the system structure with reference to shown in Fig. 2 to 4, in initial power-on, system power supply 130 works, institute
The relay 116 for having battery cupboard BMS 114 all disconnects, and battery cupboard 110 is in the static condition for not filling and not putting with busbar 120, this
When busbar 120 initial voltage value be zero.Each BMS detects its voltage value of battery cupboard 110 managed and is reported to control cabinet
150, by 150 more each battery cupboard 110 of control cabinet voltage value and be grouped and calculate the entirety of all battery cupboards 110 and put down
Equal voltage value, if the average voltage level using each battery cupboard group is pressed between battery cupboard group sequence battery cupboard 110 as escribed above
Difference is less than the first battery cupboard group of predetermined threshold value 30V, average voltage for 797V, and pressure difference is less than predetermined threshold value between battery cupboard 110
Pressure difference is less than predetermined threshold value 30V between the second battery cupboard group and battery cupboard that 30V, average voltage are 764V, average voltage is
Third battery cupboard group of 726V etc., comparison result is：761 ＜ of voltage value 726V ＜ ensemble averages voltage value of third battery cupboard group
The voltage value 797V of voltage value 764V ＜ the first battery cupboard groups of second battery cupboard group, then can be first by the minimum third electricity of voltage
All battery cupboards 110 of pond cabinet group are linked on busbar 120, by system power supply 130 to all battery cupboards of third battery cupboard group
Carrying out charging makes the voltage value of busbar 120 rise to the ensemble average voltage value.Then highest first electricity of voltage is reinformed
All battery cupboards of pond cabinet group are linked on busbar, are then turned off system power supply 130, to all battery cupboards of the first battery cupboard group
It discharges, when 120 voltage of busbars drops to the average voltage level of the second battery cupboard group, reinforms each in the second battery cupboard group
The BMS of battery cupboard is linked on busbar, is disconnected system power supply 130 and is discharged each battery cupboard of the second battery cupboard group, waits mothers
When arranging 120 voltages and dropping to the ensemble average voltage value, it is then turned on system power supply 130 and each lithium electricity module in parallel is filled
Electric discharge.
The present invention can realize in other specific forms, without departing from its spirit and essential characteristics.Therefore, current reality
Apply example be all counted as being exemplary rather than in all respects it is limited, the scope of the present invention by appended claims rather than on
State description definition, also, fall into claim meaning and equivalent in the range of whole change all to be included in this
Among the range of invention.Also, the different technologies feature occurred in different embodiments can be combined, to obtain beneficial to effect
Fruit.Those skilled in the art will be understood that and realize revealed on the basis of research attached drawing, specification and claims
The embodiment of other variations of embodiment.
Claims (15)
1. the electrification control method of a kind of battery cupboard to lithium ion battery charge and discharge, which is characterized in that include the following steps：
A. the voltage value of each battery cupboard is obtained；
B., voltage difference is divided into one group of mode to be grouped each battery cupboard less than the battery cupboard of predetermined threshold value；
C. the battery cupboard group of the difference minimum in each battery cupboard group between average voltage and busbar voltage is sequentially ingressed into busbar；
D. simultaneously to each battery cupboard charge and discharge after access busbar, when the voltage of each battery cupboard is equal or close to each electricity
Pond cabinet carries out electric control.
2. the electrification control method of battery cupboard according to claim 1, the pre-set threshold value is 30V.
3. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step a includes：
The battery cabinet controller of each battery cupboard is instructed to disconnect the connection of each battery cupboard and busbar, and passes through communication interface to institute
It states battery cabinet controller and obtains the voltage value of battery cupboard that the battery cabinet controller is managed, and then obtain the electricity of each battery cupboard
Pressure value.
4. the electrification control method of battery cupboard according to claim 3, which is characterized in that the communication interface for serial ports,
Any one or a few between network interface, CAN, wireless, dry node and battery cupboard in communication interface.
5. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step c includes：
M, the average voltage level of each battery cupboard group to not accessing busbar is ranked up from low to high；
I, according to ranking results, the minimum battery cupboard group access busbar of average voltage level is charged；
J, when the voltage value of busbar rises to the average voltage level of next to the lowest battery cupboard group, by the next to the lowest battery cupboard
Group access busbar charges；
F, average voltage level third is accessed busbar according to step j modes successively down to highest battery cupboard group to charge.
6. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step c includes：
M, it is first, second to that the average voltage level of each battery cupboard group to not accessing busbar is ranked up from low to high
N battery cupboard group, wherein n are the integer more than 2；
I, into first battery cupboard group, the battery cabinet controller of each battery cupboard sends charging instruction, each battery cabinet controller
Corresponding relay is closed after being connected to charging instruction, the access busbar for completing first battery cupboard group charges；
J, when the voltage value of busbar rises to the average voltage level of second battery cupboard group, into second battery cupboard group
The battery cabinet controller of each battery cupboard sends charging instruction, and each battery cabinet controller is closed corresponding relay after being connected to charging instruction
Device, the access busbar for completing second battery cupboard group charge；
F, average voltage level third is accessed busbar according to step j modes successively to n-th of battery cupboard group to charge.
7. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step c includes：
M, it is first, second to that the average voltage level of each battery cupboard group to not accessing busbar is ranked up from low to high
N battery cupboard group, wherein n are the integer more than 2；
I, into first battery cupboard group, the battery cabinet controller of each battery cupboard sends charging instruction, each battery cabinet controller
Corresponding relay is closed after being connected to charging instruction, the access busbar for completing first battery cupboard group charges；
J, into second battery cupboard group, the battery cabinet controller of each battery cupboard sends condition charging instruction, the battery cupboard
After controller is connected to charging instruction, the average voltage of second battery cupboard group and busbar electricity are judged according to condition charging instruction
Whether pressure difference is less than threshold value, if it is not, then carrying out charging to second electricity to charged first battery cupboard group
The average voltage and busbar voltage difference of pond cabinet group are less than after threshold value, and each battery cabinet controller of second battery cupboard group closes
Corresponding relay is closed, the access busbar for completing second battery cupboard group charges；
F, average voltage level third is accessed busbar according to step j modes successively to n-th of battery cupboard group to charge.
8. the electrification control method of the battery cupboard described according to claim 6 or 7 any one, which is characterized in that described
Each battery cabinet controller of one battery cupboard group to n-th of battery cupboard group includes detection charge and discharge control system before sending instruction
The relay of system whether the whether good step of state of insulation of fault-free and system.
9. the electrification control method of the battery cupboard described according to claim 6 or 7, which is characterized in that first battery cupboard
After each battery cabinet controller of group to n-th of battery cupboard group is connected to charging instruction, all battery cupboards in each battery cupboard group is closed
Relay before further comprise detecting relay in corresponding battery cupboard whether normal and state of insulation good
Step.
10. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step c includes：
M, the average voltage level of each battery cupboard group to not accessing busbar is ranked up from high to low；
I, according to ranking results, the highest battery cupboard group access busbar of average voltage level is discharged；
J, when the voltage value of busbar drops to the average voltage level of the second high battery cupboard group, by the described second high battery cupboard
Group access busbar discharges；
F, the up to minimum battery cupboard group of average voltage level third is accessed busbar according to step j modes successively to charge.
11. the electrification control method of battery cupboard according to claim 1, which is characterized in that the step c includes：
What is calculated does not access the ensemble average voltage value of the average voltage level of each battery cupboard group of busbar；
Average voltage level is sequentially ingressed into busbar from low to high less than the battery cupboard group of the ensemble average voltage value to charge,
Until the voltage value of busbar rises to the ensemble average voltage value；
Voltage value is sequentially ingressed into busbar from high to low higher than the battery cupboard group of the ensemble average voltage value to discharge, until
The voltage value of busbar drops to the ensemble average voltage value.
12. the electrification control method of the battery cupboard according to claim 5,10 or 11, which is characterized in that the step c is also
Including：
Detect charge-discharge control system relay whether the whether good step of state of insulation of fault-free and system；And
Relay in the corresponding battery cupboard of detection whether normal and whether good state of insulation step.
13. a kind of charge-discharge control system of battery cupboard, including：Multiple battery cupboards and control cabinet, it is characterised in that：
The control cabinet is configured as obtaining the voltage value of each battery cupboard that need to be powered on, and compare the voltage value of each battery cupboard, will
The mode that the battery cupboard for the predetermined threshold value that voltage difference is less than is divided into one group is grouped each battery cupboard, each battery cupboard group
The battery cupboard group of difference minimum between middle average voltage and busbar voltage is sequentially ingressed into busbar, while to the institute after access busbar
State each battery cupboard charge and discharge.
14. system according to claim 13, which is characterized in that the control cabinet is additionally configured to detect the charge and discharge
The relay of control system whether fault-free and system state of insulation it is whether good.
15. system according to claim 13, which is characterized in that the battery cupboard is configured as giving lithium ion battery charge and discharge
Electricity, each battery cupboard include battery cabinet controller, and the relay that the battery cabinet controller is configured as detecting corresponding battery cupboard is
Whether no normal and state of insulation is good.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611246057.5A CN108258748A (en) | 2016-12-29 | 2016-12-29 | Power-on control method and system for battery cabinet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611246057.5A CN108258748A (en) | 2016-12-29 | 2016-12-29 | Power-on control method and system for battery cabinet |
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| CN108258748A true CN108258748A (en) | 2018-07-06 |
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| CN201611246057.5A Pending CN108258748A (en) | 2016-12-29 | 2016-12-29 | Power-on control method and system for battery cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111231768A (en) * | 2020-03-16 | 2020-06-05 | 雅迪科技集团有限公司 | Battery management system, management method and electric vehicle |
| CN111786450A (en) * | 2019-04-04 | 2020-10-16 | 宁德时代新能源科技股份有限公司 | Control method of energy storage system |
| EP3919924A4 (en) * | 2019-02-28 | 2022-04-20 | Contemporary Amperex Technology Co., Limited | Energy storage system and insulation detection method therefor |
| WO2023065243A1 (en) * | 2021-10-21 | 2023-04-27 | 宁德时代新能源科技股份有限公司 | Discharge control method and charging control method for battery pack control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3919924A4 (en) * | 2019-02-28 | 2022-04-20 | Contemporary Amperex Technology Co., Limited | Energy storage system and insulation detection method therefor |
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| WO2023065243A1 (en) * | 2021-10-21 | 2023-04-27 | 宁德时代新能源科技股份有限公司 | Discharge control method and charging control method for battery pack control system |
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