CN106816652A - Battery system and its startup control method - Google Patents
Battery system and its startup control method Download PDFInfo
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- CN106816652A CN106816652A CN201510855611.9A CN201510855611A CN106816652A CN 106816652 A CN106816652 A CN 106816652A CN 201510855611 A CN201510855611 A CN 201510855611A CN 106816652 A CN106816652 A CN 106816652A
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- Prior art keywords
- battery
- battery pack
- voltage
- preliminary filling
- control unit
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Classifications
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- 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
-
- 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
-
- 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
- H01M10/425—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
- 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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of battery system and its startup control method, the system includes：Preliminary filling unit, including preliminary filling resistance and preliminary filling relay；M relay and M diode；M battery pack, its first output end is connected after corresponding series connection with M relay with preliminary filling unit first end, and preliminary filling unit first end is connected on the first output bus, and the M output end of battery pack second is electrically connected with the second output bus；M the first output end of battery pack is corresponded with the M first end of diode and connected, and the second end of M diode is connected after linking together with the second end of preliminary filling unit；M battery management unit, connects one to one with acquisition state information with M battery pack；Battery control unit controls preliminary filling relay to close after electrifying startup, obtains the voltage sequence of battery pack, is started successively according to voltage sequence M battery pack of control after the first Preset Time.The system only uses a preliminary filling resistance and preliminary filling relay, reduces cost.
Description
Technical field
The present invention relates to cell art, more particularly to a kind of battery system and its start control method.
Background technology
In HVDC electric power system field, current lithium iron battery is more and more applied.To realize High voltage output, use
Be that multiple battery modules are used in series, each battery module is general to be made up of 16 string iron lithium cells, exports 48V.Current one
As have 240V systems (5 battery modules connect), 336V systems (7 battery modules are connected), 480V systems (10
Battery module is connected) etc..In addition, the charging time in order to extend battery pack, needs the battery pack system that will have been connected simultaneously again
Connection gets up with hoist capacity, so as to improve power output.
Battery management system, typically manages a battery module, to what is managed using a BMU (battery management unit)
Battery module carries out voltage, the collection of temperature and Balance route etc..And all of BMU is then by BCU (battery control unit)
Unified management, BMU sends the data to BCU, BCU then to receive the data of whole system carry out statistical analysis, concurrently
Go out various corresponding control commands, realize the control to whole system.
In electrifying startup Managed Solution in correlation technique, generally can increase preliminary filling resistance and pre- at each group battery pack end in parallel
Relay is filled, solves the problems, such as that electric current is excessive in circulation loop between battery pack by preliminary filling resistance, while it also avoid cold conditions
The heavy current impact of capacitive load during startup, as shown in Figure 1.When system electrification starts, first close all of preliminary filling after
Electrical equipment K2 ... Kn2 (here n=1,2,3... represent the preliminary filling relay sequence number in n-th group battery pack, similarly hereinafter), and pass through
Cross after predetermined set time t (such as t can be set to 1 second), then be switched to relay K1, K11 ... the Kn1 for charging normal in succession
(the access order of here, K1, K11 ... Kn1 is that the order according to battery voltage from small to large is accessed, as long as and having
One group charges normal relay K1 (or Kn1) access systems, then can be by all of preliminary filling relay K2, K12 ... Kn2
Disconnect), but so per Battery pack group will on relay is charged normal a preliminary filling relay in parallel and preliminary filling resistance.
Although solving circulation between battery pack by the method for preliminary filling relay in parallel and preliminary filling resistance on relay is charged normal
The excessive problem of electric current in loop, it is to avoid the heavy current impact of capacitive load during cold start.But, do so is but simultaneously
System cost is increased, particularly with the system for having multigroup battery pack in parallel, its preliminary filling relay and preliminary filling resistance quantity will be with
Increase.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, one of the invention
Purpose is to propose a kind of battery system, it is to avoid the heavy current impact of capacitive load during cold start, between solving battery pack
A preliminary filling resistance and a preliminary filling relay have only been used in circulation loop in the excessive problem of electric current, and the battery system,
So as to greatly reduce cost.
Second object of the present invention is the startup control method for proposing a kind of battery system.
To achieve these goals, the battery system of first aspect present invention embodiment, including：Preliminary filling unit, the preliminary filling
Unit includes the preliminary filling resistance and preliminary filling relay that are connected in series；M relay and M diode, wherein, M is more than 1
Integer；M battery pack, the first output end of the M battery pack and the M relay correspond after connect and
The first end of the preliminary filling unit is connected, and the first end of the preliminary filling unit is connected on the first output bus, the M electricity
Second output end of pond group is electrically connected with the second output bus；First output end of the M battery pack and the M two poles
The first end of pipe corresponds series connection, the second end of the M diode link together after with the preliminary filling unit second
End is connected；M battery management unit, M battery management unit and M battery pack connect one to one to gather respective battery
The status information of group；Battery control unit, the battery control unit is communicated with the M battery management unit respectively,
The battery control unit is used to control the preliminary filling relay to close after the battery system electrifying startup, and to the M
Individual battery pack is polled and is sorted with obtaining the voltage of each battery pack, and according to described each electricity after the first Preset Time
The voltage sequence of pond group is by being controlled such that to the M relay M battery pack by voltage from as low as big suitable
Sequence starts successively.
Battery system according to embodiments of the present invention, it is to avoid the heavy current impact of capacitive load during cold start, solves electricity
Only used in the excessive problem of electric current, and the battery system in circulation loop between the group of pond a preliminary filling resistance and a preliminary filling after
Electrical equipment, so as to greatly reduce cost.
To achieve these goals, the battery system based on first aspect present invention embodiment, second aspect present invention embodiment
Battery system startup control method, comprise the following steps：After the battery system electrifying startup, the battery control
Unit controls the preliminary filling relay closure；The battery control unit is polled to obtain each to the M battery pack
The voltage sequence of battery pack；And after the first Preset Time of the battery system electrifying startup, the battery control unit
Voltage sequence according to each battery pack is controlled such that the M battery pack by electricity by the M relay
Pressure starts successively from as low as big order.
The startup control method of battery system according to embodiments of the present invention, it is to avoid the high current of capacitive load during cold start
Impact, solves the problems, such as that electric current is excessive in circulation loop between battery pack, and a preliminary filling resistance has only been used in battery system
With a preliminary filling relay, so as to greatly reduce cost.
Brief description of the drawings
Fig. 1 is the principle schematic of the battery system in correlation technique；
Fig. 2A is the schematic diagram of battery system according to an embodiment of the invention；
Fig. 2 B are the schematic diagrames of battery system in accordance with another embodiment of the present invention；
Fig. 3 is the sequence starting state diagram of battery system according to an embodiment of the invention；
Fig. 4 is the sequence starting state transition graph of battery system according to an embodiment of the invention.
Fig. 5 is the flow chart of the startup control method of battery system according to an embodiment of the invention；
Fig. 6 is according to a flow chart for the startup control method of the battery system of specific embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein identical from start to finish
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition battery system and battery system startup control method.
Fig. 2A is the schematic diagram of battery system according to an embodiment of the invention.As shown in Figure 2 A, the embodiment of the present invention
Battery system 10 includes：Preliminary filling unit 100, M battery pack 200, M relay (K1, K21, K31 ... KM1), M
Individual diode (D1, D2, D3 ... DM), M battery management unit 300 and battery control unit 400.Wherein, M is big
In 1 integer.
Wherein, preliminary filling unit 100 includes the preliminary filling resistance R0 and preliminary filling relay K0 that are connected in series.As shown in Fig. 2 pre-
The first end for filling unit 100 is connected with the first output bus 11, and the second end of preliminary filling unit 100 exports bus 12 with second
It is connected.
M battery pack, the first output end 201 of M battery pack 200 and M relay (K1, K21, K31 ... KM1)
It is connected with the first end 101 of preliminary filling unit 100 after corresponding series connection, the first end 101 of preliminary filling unit 100 is connected to the
On one output bus 11, M the second output end 202 of battery pack 200 is electrically connected with the second output bus 12；M battery
First output end 201 of group 200 is corresponded with the first end 13 of M diode (D1, D2, D3 ... DM) and connected, M
Second end 14 of individual diode is connected after linking together with the second end 102 of preliminary filling unit 100.
In one embodiment of the invention, as shown in Figure 2 A, the first output end 201 of M battery pack 200 is that positive pole is defeated
Go out end, the second output end 202 is cathode output end；First output bus 11 is that positive pole exports bus, the second output bus
12 is that negative pole exports bus.Accordingly, the of M diode being connected with the first output end 201 of M battery pack 200
One end is anode, and M the second end of diode is negative electrode.
Certainly, so it is easy to understand that in another embodiment of the present invention, can also be；M the first of battery pack defeated
It is cathode output end to go out end, and the second output end is cathode output end；First output bus is that negative pole exports bus, the second output
Bus is that positive pole exports bus.Accordingly, M diode being connected with the first output end 201 of M battery pack 200
First end is negative electrode, and M the second end of diode is anode (no longer being illustrated with figure herein).
Compared with the battery system in correlation technique, in the battery system of the embodiment of the present invention, even if using multigroup battery pack
200 is in parallel, also only needs to use an a preliminary filling relay K0 and preliminary filling resistance R0, while in every Battery pack group
200 the first output end 201 respectively increases diode D1, D2 ... a DM.Although the first output per Battery pack group 200
End 201 increased a diode, but diode cost than preliminary filling resistance and the low cost of preliminary filling relay so that
Reduce system cost.
M battery management unit 300 (BMU, Battery Management Unit), M battery management unit 300 and M
Individual battery pack 200 connects one to one to gather the status information of respective battery group 200.
Specifically, battery management unit 300 is corresponded with battery pack 200 and is connected, and battery management unit 300 is used to gather
The status information of the entirety of respective battery group 200.
Battery control unit 400 (BCU, Battery Control Unit) is carried out with each battery management unit 300 respectively
Communication, battery control unit 400 is used to control preliminary filling relay K0 closures after battery system electrifying startup, and to M electricity
Pond group 200 is polled and is sorted with obtaining the voltage of each battery pack 200, and according to each electricity after the first Preset Time
The voltage sequence of pond group 200 is by being controlled such that to M relay M battery pack 200 by voltage from as low as big suitable
Sequence starts successively.Wherein, it refers to that battery pack 200 accesses the first output bus 11 that battery pack 200 starts.
Wherein, battery control unit 400 is polled to M battery pack 200 and refers to：Battery control unit 400 successively with
The M battery management unit of battery pack 200 300 is communicated with obtaining the M status information of battery pack 200.
In another embodiment of the present invention, as shown in Figure 2 B, each battery pack 200 in M battery pack 200 includes
N number of battery module 210 being connected in series, N is the integer more than or equal to 1；Battery management unit 300 includes N number of sub- battery
Administrative unit 310, every sub- battery management unit 310 gather a status information for battery module 210 and with battery control
Unit 400 is communicated.
By taking 336V system schemas as an example, i.e., one battery pack 200 is connected by 7 battery modules 210, each battery module
210 are made up of 16 string iron lithium cells again, and wherein each battery core internal resistance is about 1m Ω, i.e. system battery group internal resistance total size is
112m Ω (i.e. 16*7*1m Ω, the internal resistances such as system connecting copper bar, wire are also have ignored among these).Battery core can bear most
Big charging current is 50A.Therefore the condition of the access system busbar of battery pack 200 (condition that i.e. battery pack 200 starts) should
Meet：Preparation wants the voltage of (preparing what is started) battery pack 200 of access system busbar to be less than the minimum battery for having accessed
Group voltage adds 5V (i.e. 112m Ω * 50A are approximately equal to 5V).Additionally, preparing the battery pack 200 for accessing apart from a upper battery pack
The time of 200 access systems need to be met more than predetermined time interval t1.
In one embodiment of the invention, after the first Preset Time battery control unit 400 according to each battery pack 200
Voltage sequence obtain the minimum battery pack 200 of voltage in M battery pack 200, and control voltage minimum battery pack 200
Corresponding relay is closed so that the minimum battery pack 200 of voltage starts, while controlling preliminary filling relay K0 to disconnect.
Specifically, the control preliminary filling relay of battery control unit 400 K0 closures after battery system electrifying startup, and battery are controlled
Unit 400 is polled to M battery pack 200 and is sorted with obtaining the voltage of each battery pack 200, apart from battery system
After upper electric first preset time t (for example, t is 1 second), voltage is minimum during battery control unit 400 obtains M battery pack
Battery pack 200, and the minimum corresponding relay of battery pack 200 of control voltage is closed so that the minimum battery pack of voltage is opened
It is dynamic, while controlling preliminary filling relay K0 to disconnect.
Wherein, within this period of preliminary filling relay K0 closures, because preliminary filling resistance R0 is present, it is to avoid cold start
When capacitive load heavy current impact, and due to increased diode D1, D2 ... DM at every end of Battery pack group 200, therefore again
Can avoid producing circulation between battery pack, i.e., not exist circulation loop between battery pack 200 during this period.
Lower mask body introduction controls the process that remaining M-1 battery pack 200 starts.
In one embodiment of the invention, after the minimum battery pack 200 of voltage starts, if M battery pack 200 it
Between voltage difference be less than or equal to predetermined voltage threshold, battery control unit 400 according to battery pack 200 voltage from it is small to
Big order controls M-1 battery pack 200 to start successively every the second Preset Time.
Specifically, after control preliminary filling relay K0 disconnects, judge whether the voltage difference between M battery pack 200 is small
In or equal to predetermined voltage threshold (for example, 112m Ω * 50A are approximately equal to 5V), if the voltage difference between battery pack 200
Less than or equal to predetermined voltage threshold, then determine whether whether the time started apart from a upper battery pack 200 has reached the
Two predetermined threshold value t1, if it is, controlling next Battery pack group 200 to start, circulate successively, until by remaining M-1
Battery pack 200 starts finish successively.Wherein, battery pack 200 start sequencing be according to battery pack 200 voltage from
It is small to big order.
In one embodiment of the invention, after the minimum battery pack 200 of voltage starts, if M battery pack 200 it
Between voltage difference be more than predetermined voltage threshold, when battery control unit 400 judges whether to start next battery pack 200,
Wherein, if reaching the 3rd Preset Time with the time interval of upper one startup battery pack 200, battery control unit 400 is controlled
Next battery pack 200 is made to start；If the voltage of next battery pack 200 is less than minimum in the battery pack 200 having been turned on
It is default that the voltage of battery pack 200 reaches second with predetermined voltage threshold sum and with the time interval of upper one startup battery pack 200
Time, battery control unit 400 controls next battery pack 200 to start；If there is electric discharge in the battery pack 200 having been turned on
Electric current is alerted, and battery control unit 400 controls next battery pack 200 to start.It is understood that next battery pack
200 refers to the battery pack 200 of voltage minimum in not actuated battery pack.
Specifically, after control preliminary filling relay K0 disconnects, judge whether the voltage difference between M battery pack 200 is small
In or equal to predetermined voltage threshold (for example, 112m Ω * 50A are approximately equal to 5V), if the voltage difference between battery pack 200
More than predetermined voltage threshold, then battery control unit 400 judges whether to start next battery pack 200, if meeting following
Any one of three kinds of situations, all control start next battery pack 200：
(1) if the voltage of next battery pack 200 be less than in the battery pack 200 that has been turned on the minimum voltage of battery pack 200 with
Predetermined voltage threshold sum and reach the second preset time t 1 with the time interval of upper one startup battery pack 200, battery control
Unit 400 then controls next battery pack 200 to start.
(2) if reaching the 3rd preset time t 2, battery control unit with the time interval of upper one startup battery pack 200
400 next battery packs 200 of control start.
Wherein, the value to the 3rd preset time t 2 is illustrated：Because the battery pack 200 having been turned on can be charged, voltage
Can be gradually increasing, then, as long as the value control of the 3rd preset time t 2 is good, then apart from upper one startup battery pack
In 200 t2 times, the voltage of next battery pack 200 to be launched will be met less than in the battery pack 200 having been turned on
The voltage of minimum battery pack 200 and predetermined voltage threshold sum.
(3) if electric discharge excessively stream alarm occurs in the battery pack 200 having been turned on, battery control unit 400 controls described next
Battery pack 200 starts.
Battery control unit 400 controls all of battery pack 200 to start successively, is pressed during battery pack 200 starts
According to the voltage of battery pack 200 from the order access system busbar of small arrival, so as to solve battery pack between electric current mistake in circulation loop
Big problem.
In addition, if battery system occurs in that the alarm situations such as abnormal battery module quantity, communication failures, electric discharge excessively stream,
Be specifically described below for otherwise processed by its State Transferring.
In one embodiment of the invention, (the i.e. battery pack as shown in figure 3, before and after by the access system busbar of battery pack 200
Before and after 200 start), tri- states of T0, T1, T2 are defined respectively：
(1) T0 states
Start all invalid this section of interval of flag and battery pack sequence starting process end of identification position in battery pack sequence starting process
It is interior, and battery system does not complete once the scanning of all battery datas, or battery system is from starting elapsed time till now
Less than predetermined time t.Or current system occurs, and battery pack quantity is abnormal, communication failures alarm, then switch to this kind of shape
State.
(2) T1 states
Battery pack sequence starting process start flag effectively with invalid this section of area in battery pack sequence starting process end of identification position
It is interior, in order access system busbar of this stage battery pack 200 according to global voltage from small to large.
(3) T2 states
Battery pack sequence starting process start flag effectively with battery pack sequence starting process end of identification position effectively this section of area
Interior, the battery pack 200 that battery system completes accesses busbar work.
Fig. 4 show the sequence starting state transition condition schematic diagram of battery system.Every kind of state enters into the bar of NextState
Part is as follows：
(1) start and start (T0 → T1)
Battery control unit 400 has completed one week voltage data of M battery pack 200 of poll, and system is existing from starting to
It is more than predetermined time t in elapsed time, and the function such as current system battery module quantity, communication is normal.
(2) start-up course (T1 → T2)
When the T1 stages are entered, battery pack 200 sequentially sequences access system from small to large according to magnitude of voltage, thereafter according to whole
Whether the voltage difference between individual system battery group 200 starts in two kinds of situation all within 5V, in embodiment above
Through being illustrated, will not be repeated here.
(3) start and wait (T2 → T0 or T1 → T0)
1st, there is the recovery of the discharge prevention of battery pack 200 in T1 or T2 states in system；
2nd, there is battery module quantity, communication failures alarm in T1 or T2 states, in battery system in system.
The battery system of the embodiment of the present invention, it is to avoid the heavy current impact of capacitive load during cold start, solves battery pack
Between the excessive problem of electric current in circulation loop, and a preliminary filling resistance and a preliminary filling relay have only been used in the battery system,
So as to greatly reduce cost.
Based on the battery system in above-described embodiment, the invention allows for a kind of startup control method of battery system.
Fig. 5 is the flow chart of the startup control method of battery system according to an embodiment of the invention.As shown in figure 5, this
The startup control method of the battery system of inventive embodiments, comprises the following steps：
S1, after battery system electrifying startup, battery control unit control preliminary filling relay closure.
Specifically, after battery system electrifying startup, all relays in battery system are in off-state, battery control
Unit controls preliminary filling relay K0 to close first, to avoid the issuable heavy current impact of capacitive load during cold start.
S2, battery control unit is polled to M battery pack and is sorted with obtaining the voltage of each battery pack.
Wherein, M battery pack is polled refers to that battery management unit of the battery control unit successively with M battery pack enters
Row communicates with obtaining the M status information of battery pack.
Specifically, battery control unit is communicated with each battery management unit respectively, with obtain all battery packs voltage,
The data such as temperature, after the data of all battery packs of a battery control unit poll complete battery system, by battery pack according to
Voltage order from small to large is ranked up.
S3, after the first Preset Time of battery system electrifying startup, battery control unit is arranged according to the voltage of each battery pack
Sequence is controlled such that M battery pack is started successively by voltage from as low as big order by M relay.
Wherein, it refers to that control battery pack accesses the first output bus 11 that control battery pack starts.
In one embodiment of the invention, step S3 is specifically included：Battery control unit is according to every after the first Preset Time
The voltage sequence of individual battery pack obtains the battery pack of voltage minimum in M battery pack, and the minimum battery pack correspondence of control voltage
Relay close so that the minimum battery pack of voltage starts, while controlling preliminary filling relay to disconnect.
Specifically, after electric first preset time t on battery system (for example, t is 1 second), battery control unit control
The corresponding relay of the minimum battery pack of voltage processed closes the battery pack startup so that voltage minimum, while controlling preliminary filling relay
K0 disconnects.
In one embodiment of the invention, step S3 also includes：After the minimum battery pack of voltage starts, if M electricity
Voltage difference between the group of pond is less than or equal to predetermined voltage threshold, battery control unit according to battery pack voltage from small to large
Order every the second Preset Time control M-1 battery pack start successively.
Specifically, after control preliminary filling relay K0 disconnects, judge voltage difference between M battery pack whether less than or
Equal to predetermined voltage threshold (for example, 112m Ω * 50A are approximately equal to 5V), if the voltage difference between battery pack is less than or waits
In predetermined voltage threshold, then determine whether whether the time started apart from a upper battery pack has reached the second predetermined threshold value t1,
If it is, controlling next Battery pack group to start, circulate successively, finished until remaining M-1 battery pack is started successively.
Wherein, the sequencing that battery pack starts is according to the voltage order from small to large of battery pack.
In another embodiment of the present invention, step S3 also includes：After the minimum battery pack of voltage starts, if M
Voltage difference between battery pack is more than predetermined voltage threshold, when battery control unit judges whether to start next battery pack,
Wherein, if reaching the 3rd Preset Time with the time interval of upper one startup battery pack, battery control unit control is next
Battery pack starts；If the voltage of next battery pack is less than minimum battery voltage and predeterminated voltage in the battery pack having been turned on
Threshold value sum and reach the second Preset Time with the time interval of upper one startup battery pack, battery control unit control is next
Battery pack starts；If discharge current alarm occurs in the battery pack having been turned on, battery control unit controls next battery pack to open
It is dynamic.
It is understood that described next battery pack refers to the battery pack of voltage minimum in not actuated battery pack.
Specifically, after control preliminary filling relay K0 disconnects, judge voltage difference between M battery pack whether less than or
Equal to predetermined voltage threshold (for example, 112m Ω * 50A are approximately equal to 5V), if the voltage difference between battery pack is more than default
Voltage threshold, then battery control unit judges whether to start next battery pack, if meeting any one of following three kinds of situations,
All control starts next battery pack：
(1) if the voltage of next battery pack is less than minimum battery voltage and predetermined voltage threshold in the battery pack having been turned on
Sum and with upper one startup battery pack time interval reach the second preset time t 1, battery control unit then controls next
Battery pack starts.
(2) if reaching the 3rd preset time t 2 with the time interval of upper one startup battery pack, battery control unit is then controlled
Next battery pack is made to start.
Battery control unit controls all of battery pack to start successively, according to battery voltage during battery pack starts
From the order access system busbar of small arrival, so as to solve the problems, such as battery pack between in circulation loop electric current it is excessive.
Fig. 6 is according to a flow chart for the startup control method of the battery system of specific embodiment of the invention.As shown in fig. 6,
The startup control method of the battery system of the embodiment of the present invention, comprises the following steps：
S101, controls preliminary filling relay K0 closures after electricity on battery system.
S102, BCU judge whether one week complete to the data polling of M battery packIf so, S103 is performed, if it is not, returning
S102 continues to judge.
S103, judges whether electricity time interval till now has reached the first preset time t from battery systemIf so, then
S104 is performed, if it is not, return to S103 to continue to judge.
S104, the minimum battery pack of control voltage starts, and disconnects preliminary filling relay K0.
S105, judges whether the voltage difference between battery pack is both less than equal to predetermined voltage threshold (for example, 5V)If so,
S107 is performed, if it is not, performing S109 or S110 or S111.
S106, judges to start whether time interval has reached the second preset time t 1 with a upper battery packIf so, performing
S107, if it is not, return to S106 to continue to judge.
S107, controls next battery pack to start.
S108, judges whether that all battery packs all have been turned onIf so, then battery pack sequence starting is completed, if it is not, return is held
Row S106.
S109, judges to start whether time interval has reached the 3rd preset time t 2 with a upper battery packIf so, performing
S112, if it is not, return performing S109 or S110 or S111.
Whether S110, judge next battery voltage to be accessed less than (the minimum battery voltage+5V for having accessed), and
And reach the second preset time t 1 apart from upper battery pack startup time intervalIf so, S112 is performed, if it is not, return is held
Row S109 or S110 or S111.
Whether S111, the battery pack that judgement has been turned on there is electric discharge excessively stream alarmIf so, S112 is performed, if it is not, return is held
Row S109 or S110 or S111.
S112, controls next battery pack to start.
S113, judges whether that all battery packs all have been turned onIf so, then battery pack sequence starting is completed, if it is not, return is held
Row S109 or S110 or S111.
The startup control method of the battery system of the embodiment of the present invention, it is to avoid the heavy current impact of capacitive load during cold start,
Solve the problems, such as that electric current is excessive in circulation loop between battery pack, and a preliminary filling resistance and one have only been used in battery system
Preliminary filling relay, so as to greatly reduce cost.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ",
" outward ", the orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on
Orientation shown in the drawings or position relationship, are for only for ease of and describe of the invention and simplify description, rather than instruction or hint institute
The device or element of finger must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this hair
Bright limitation.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed
Or implicitly include at least one this feature.In the description of the invention, " multiple " is meant that at least two, such as two
It is individual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation "
Should be interpreted broadly Deng term, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or two interaction relationships of element, unless otherwise clearly restriction.It is common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be as the case may be understood.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or fisrt feature level height is merely representative of higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or to be merely representative of first special
Level height is levied less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. mean to combine the specific features of the embodiment or example description, structure, material or
Feature is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be with
Combined in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, ability
The technical staff in domain can enter the feature of the different embodiments or example described in this specification and different embodiments or example
Row is combined and combined.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, changes, replacing and modification.
Claims (12)
1. a kind of battery system, it is characterised in that including：
Preliminary filling unit, the preliminary filling unit includes the preliminary filling resistance and preliminary filling relay that are connected in series；
M relay and M diode, wherein, M is the integer more than 1；
M battery pack, the first output end of the M battery pack and the M relay correspond after connecting with it is described
The first end of preliminary filling unit is connected, and the first end of the preliminary filling unit is connected on the first output bus, the M battery pack
The second output end with second output bus electrically connect；First output end of the M battery pack and the M diode
First end corresponds series connection, the second end of the M diode link together after the second end phase with the preliminary filling unit
Even；
M battery management unit, M battery management unit and M battery pack connect one to one to gather respective battery group
Status information；
Battery control unit, the battery control unit is communicated with the M battery management unit respectively, the battery
Control unit is used to control the preliminary filling relay to close after the battery system electrifying startup, and to the M battery pack
It is polled and is sorted with obtaining the voltage of each battery pack, and according to the electricity of each battery pack after the first Preset Time
Pressure sequence is controlled such that the M battery pack is opened successively by voltage from as low as big order by the M relay
It is dynamic.
2. battery system according to claim 1, it is characterised in that each the battery pack bag in the M battery pack
N number of battery module being connected in series is included, N is the integer more than or equal to 1；The battery management unit includes N number of sub- battery
Administrative unit, every sub- battery management unit gathers a status information for battery module and is carried out with the battery control unit
Communication.
3. battery system according to claim 1, it is characterised in that the first output end of the M battery pack is for just
Pole output end, the second output end is cathode output end；The first output bus is that positive pole exports bus, second output
Bus is that negative pole exports bus.
4. battery system according to claim 1, it is characterised in that the first output end of the M battery pack is negative
Pole output end, second output end is cathode output end；The first output bus is that negative pole exports bus, described second
Output bus is that positive pole exports bus.
5. battery system according to claim 1, it is characterised in that the first end of the M diode is anode,
Second end of the M diode is negative electrode；Or the first end of the M diode is negative electrode, the M diode
The second end be anode.
6. battery system according to claim 1, it is characterised in that the battery control after first Preset Time
The voltage sequence of unit processed each battery pack according to obtains the battery pack of voltage minimum in the M battery pack, and controls
The corresponding relay of the minimum battery pack of the voltage closes the battery pack startup so that voltage minimum, while control is described
Preliminary filling relay disconnects.
7. battery system according to claim 6, it is characterised in that after the minimum battery pack of the voltage starts,
If the voltage difference between the M battery pack is less than or equal to predetermined voltage threshold, the battery control unit is according to electricity
The voltage of pond group order from small to large controls M-1 battery pack to start successively every the second Preset Time.
8. battery system according to claim 6, it is characterised in that after the minimum battery pack of the voltage starts,
If the voltage difference between the M battery pack is more than predetermined voltage threshold, the battery control unit judges whether to start
During next battery pack, wherein,
If reaching the 3rd Preset Time with the time interval of upper one startup battery pack, the battery control unit control is described
Next battery pack starts；
If the voltage of next battery pack is less than minimum battery voltage and the predeterminated voltage in the battery pack having been turned on
Threshold value sum and reach the second Preset Time with the time interval of upper one startup battery pack, the battery control unit controls institute
Next battery pack is stated to start；
If discharge current alarm occurs in the battery pack having been turned on, the battery control unit controls next battery
Group starts.
9. it is a kind of based on claim 1 provide battery system startup control method, it is characterised in that comprise the following steps：
After the battery system electrifying startup, the battery control unit controls the preliminary filling relay closure；
The battery control unit is polled to the M battery pack and is sorted with obtaining the voltage of each battery pack；And
After the first Preset Time of the battery system electrifying startup, the battery control unit each battery pack according to
Voltage sequence by the M relay be controlled such that the M battery pack by voltage from as low as big order according to
Secondary startup.
10. the startup control method of battery system as claimed in claim 9, it is characterised in that described in the battery system
Voltage sequence after the system Preset Time of electrifying startup first according to each battery pack is controlled by the M relay
Make so that the M battery pack starts successively, specifically include：
The voltage sequence of the battery control unit each battery pack according to obtains the M after first Preset Time
The minimum battery pack of voltage in individual battery pack, and control the corresponding relay of the minimum battery pack of the voltage to close so that described
The minimum battery pack of voltage starts, while controlling the preliminary filling relay to disconnect.
The startup control method of 11. battery systems as claimed in claim 10, it is characterised in that also include：
After the minimum battery pack of the voltage starts, if the voltage difference between the M battery pack is less than or equal to pre-
If voltage threshold, the battery control unit is controlled according to the voltage order from small to large of battery pack every the second Preset Time
M-1 battery pack starts successively.
The startup control method of 12. battery systems as claimed in claim 10, it is characterised in that also include：
After the minimum battery pack of the voltage starts, if the voltage difference between the M battery pack is more than predeterminated voltage
Threshold value, when the battery control unit judges whether to start next battery pack, wherein,
If reaching the 3rd Preset Time with the time interval of upper one startup battery pack, the battery control unit control is described
Next battery pack starts；
If the voltage of next battery pack is less than minimum battery voltage and the predeterminated voltage in the battery pack having been turned on
Threshold value sum and reach the second Preset Time with the time interval of upper one startup battery pack, the battery control unit controls institute
Next battery pack is stated to start；
If discharge current alarm occurs in the battery pack having been turned on, the battery control unit controls next battery
Group starts.
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| CN201510855611.9A CN106816652B (en) | 2015-11-27 | 2015-11-27 | Battery system and its starting control method |
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| CN201510855611.9A CN106816652B (en) | 2015-11-27 | 2015-11-27 | Battery system and its starting control method |
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| CN107947261A (en) * | 2017-11-14 | 2018-04-20 | 欣旺达电子股份有限公司 | Multi-string battery powering method, apparatus and system |
| CN108054745A (en) * | 2017-12-15 | 2018-05-18 | 天津津航计算技术研究所 | A kind of method for controlling power supply with capacitive overload protection |
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| CN114295974A (en) * | 2021-12-30 | 2022-04-08 | 上海儒竞智控技术有限公司 | Detection method and detection circuit for failure of pre-charging relay |
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| CN106816652B (en) | 2019-08-13 |
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