CN107910914A - The load distribution method in parallel applied between lithium battery group in power-supply system - Google Patents
The load distribution method in parallel applied between lithium battery group in power-supply system Download PDFInfo
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- CN107910914A CN107910914A CN201711191668.9A CN201711191668A CN107910914A CN 107910914 A CN107910914 A CN 107910914A CN 201711191668 A CN201711191668 A CN 201711191668A CN 107910914 A CN107910914 A CN 107910914A
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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Abstract
The embodiment of the invention discloses the load distribution method in parallel that lithium battery group is applied using lithium battery group parallel connection in power-supply system, it is related to power electronics field, the maintenance cost of the battery pack in power-supply system can be reduced.The present invention includes：The lithium battery group includes 2 sub- battery packs, and every sub- battery pack includes a charging pole, a discharge electrode and a common anode.Wherein, the charging control switch for the cathode configuration unilateal conduction characteristic that charges, and battery pack described in current direction；The discharge control switch for cathode configuration unilateal conduction characteristic of discharging, and current direction external loading；The sub- battery pack of the lithium battery group is configured with respective battery management system (BMS), and it is in communication with each other between each BMS using CAN2.0B agreements, exchange the operation and control information of each sub- battery pack, realize the sharing of load of sub- battery pack (sub- battery pack " electric discharge " or " preparing to use " State Transferring control).The battery pack of present invention application in parallel suitable for power-supply system.
Description
Technical field
The present invention relates to the load in parallel applied between lithium battery group in power electronics field, more particularly to power-supply system
Distribution method.
Background technology
At present, all kinds of DC power systems have been widely used, and in order to improve the reliability of DC power system, need
To install large-capacity battery pack additional wherein.And in practical applications, it usually needs the battery sets in parallel operation of configuration 2 and the above
To improve the reliability of battery pack and increase battery capacity.
In order to ensure the stability after large-capacity battery pack parallel connection, it usually needs select the same model of same producer even
Be with a batch of battery, and parallel circuit set up after, adjust 2 Battery packs voltage and load capacity, when be adjusted to electricity
Formally and DC power system is accessed when pressure is consistent with load capacity.
But since the operation characteristic because of battery pack is unable to control, in actual engineer application, due to battery production business's
Product control problem, and the influence of all kinds of complex environment factors, often cause the battery pack that erection in parallel finishes to occur unknown
Electrology characteristic, and the unknown battery pack of 2 groups of characteristics it is directly in parallel after be often difficult to stable operation, it is necessary to which technical staff is follow-up
Maintenance in be constantly adjusted, this undoubtedly adds maintenance cost.
The content of the invention
The embodiment of the present invention provides in parallel using the lithium battery group load in parallel using lithium battery group point in power-supply system
Method of completing the square, can reduce the maintenance cost of the battery pack in power-supply system.
To reach above-mentioned purpose, the embodiment of the present invention adopts the following technical scheme that：
The load distribution method in parallel applied between lithium battery group in a kind of power-supply system, including：Lithium battery group and cell tube
Reason system；
The lithium battery group includes 2 sub- battery packs, and every sub- battery pack includes charging pole, a discharge electrode and one
A common anode；
Wherein, the charging control switch for the cathode configuration unilateal conduction characteristic that charges, and battery pack described in current direction；
The discharge control switch for cathode configuration unilateal conduction characteristic of discharging, and current direction external loading；
The sub- battery pack of the lithium battery group is configured with respective battery management system (BMS), and is used between each BMS
CAN2.0B agreements are in communication with each other, and in order to exchange the operation and control information of each sub- battery pack, realize the load point of sub- battery pack
Match somebody with somebody, the sharing of load of the sub- battery pack includes：The sub- battery pack " electric discharge " or " preparing to use " State Transferring control.
Specifically, the load capacity estimation based on battery pack port voltage, 80% decision condition of load capacity are：UBAT<
(3.310V~3.320V) × n-RWI0 × 1.25, wherein, UBAT is battery pack port voltage, and n is that monomer concatenates in battery pack
Number, RW is the total stable state internal resistance of the battery pack, and I0 is load current；
Specifically, the load capacity estimation based on battery pack port voltage, 30% decision condition of load capacity are：UBAT<
(3.280V~3.290V) × n-RWI0 × 1.25.
The method of the segmented sharing of load based on load capacity includes：
The sub- battery pack load capacity is preferential discharge section in 100%~80% section；
The sub- battery pack load capacity is section of suitably discharging in 80%~30% section；
The sub- battery pack load capacity is limitation electric discharge section below 30%；
The BMS of 2 sub- battery packs by CAN bus, carries out state information exchange, protocol integrated test system is real according to loaded-up condition
Existing sharing of load；
When 2 sub- battery packs are all in full and down, or load capacity is more than 90%, a sub- battery pack is in " hot standby
With " operating mode, another is in " preparing to use " operating mode；
When external communication dead electricity occurs, the sub- battery in " stand-by heat " state starts to provide electric current to load, outwards
Feed, load capacity start to reduce (from 100% to 80%)；Another keeps " preparing to use " state, and load capacity is remained above 90%
State.
Specifically, when the sub- battery pack load capacity outwards fed drops to 80%, between the first second son battery pack of beginning
Load switching, original place enter " stand-by heat " state in the sub- battery pack control of " preparing to use " state, undertake external load, load capacity
Begin to decline, specifically from 100% to 80% declines；
The sub- battery pack that original undertakes load enters " preparing to use " state, and load capacity remains less than 80% state.
Specifically, when the sub- battery pack load capacity outwards fed drops to 80%, between the second second son battery pack of beginning
Load switching, original place enter " stand-by heat " state in the sub- battery pack control of " preparing to use " state, undertake external load, load capacity
Begin to decline, specifically from 100% to 80% declines, and the sub- battery pack that original undertakes load enters " preparing to use " state, and load capacity is protected
Hold and be less than<80% state.
Specifically, when the sub- battery pack load capacity outwards fed drops to 30%, between the sub- battery pack of beginning third time
Load switching, original place enter " stand-by heat " state in the sub- battery pack control of " preparing to use " state, undertake external load, load capacity
Begin to decline, specifically from 80% to 30% declines, and the sub- battery pack that original undertakes load enters " preparing to use " state, and load capacity is kept
State less than 30%.
Specifically, when the sub- battery pack load capacity outwards fed drops to 30%, between the 4th second son battery pack of beginning
Load switching, original place enter " stand-by heat " state in the sub- battery pack control of " preparing to use " state, and original place is in the son of feed condition
Battery pack keeps " stand-by heat " state constant, and 2 sub- battery packs enter ideal diode parallel operation state, point of external load
Independently distributed with parameters such as the internal resistance by 2 sub- battery packs, port voltages.Electricity in power-supply system provided in an embodiment of the present invention
The laod sharing mode of each sub- battery packs of Chi Zuzhong, proposes the parallel way of the lithium battery in electric operating power supply system, realizes
Each sub- battery pack is exchanged without electric energy each other, is produced so as to avoid circulation.Also, it is configured with for sub- battery pack independent
BMS, the observing and controlling of sub- battery pack are completed by itself BMS, external command received by CAN bus, analyze after perform.In the present invention
The lithium battery group is configured with independent charge and discharge controlling switch, and two switches do not interfere with mutual under operating mode in parallel
Working status：In the discharged condition, dividing, closing for charge switch, will not change the discharge condition of battery pack to battery pack；Battery pack exists
During charging, discharge switch point, contract sample will not change the charged state of battery pack, as long as it is identical to realize 2 rated voltages,
It is mounted with the battery sets in parallel operation with a BMS, extenuated technical staff needs constantly adjustment electricity in follow-up maintenance
The problem of pond group, reduce the maintenance cost of the battery pack in power-supply system.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the key wiring diagram of electric operating power supply system provided in an embodiment of the present invention；
Fig. 2 is sub- the battery pack load condition and load capacity change curve in instantiation provided in an embodiment of the present invention
Figure.
Embodiment
To make those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further detail the present invention.Embodiments of the present invention are described in more detail below, the embodiment is shown
Example is shown in the drawings, wherein same or similar label represents same or similar element or has identical or class from beginning to end
Like the element of function.It is exemplary below with reference to the embodiment of attached drawing description, is only used for explaining the present invention, and cannot
It is construed to limitation of the present invention.Those skilled in the art of the present technique are appreciated that unless expressly stated, odd number shape used herein
Formula " one ", "one", " described " and "the" may also comprise plural form.It is to be further understood that the specification of the present invention
The middle wording " comprising " used refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that
In the presence of or other one or more features of addition, integer, step, operation, element, component and/or their groups.It should be understood that
When we claim element to be " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements, or
There may also be intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Here make
Wording "and/or" includes any cell of one or more associated list items and all combines.The art
Technical staff is appreciated that unless otherwise defined all terms (including technical term and scientific terminology) used herein have
The meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.It is it should also be understood that such as general
Those terms defined in dictionary, which should be understood that, to be had a meaning that is consistent with the meaning in the context of the prior art, and
Unless being defined as here, will not be explained with the implication of idealization or overly formal.
The embodiment of the present invention provides in parallel using the lithium battery group sharing of load in parallel for applying lithium battery group in power-supply system
Method, including lithium battery group and battery management system, it is characterised in that：The lithium battery group includes 2 sub- battery packs, each lithium
Battery pack includes a charging pole, a discharge electrode and a common anode, and the discharge electrode is used for negative outside current direction
Carry.
Wherein, the charging control switch for the cathode configuration unilateal conduction characteristic that charges, is one-way conduction characteristic, and current direction
The battery pack.The discharge control switch for cathode configuration unilateal conduction characteristic of discharging, is one-way conduction characteristic, and outside current direction
Section load.
Sub- battery pack is configured with respective BMS (BATTERY MANAGEMENT SYSTEM, battery management system), and respectively
It is in communication with each other between a BMS using CAN2.0B agreements, for interacting the operation information of each sub- battery pack.
In the present embodiment, the circuit structure of the battery pack parallel connection in power-supply system can be with as shown in Figure 1, have used 2 lithiums
The key wiring diagram of the electric operating power supply system of battery pack, wherein containing 2 above-mentioned sub- battery packs.It is specifically, described
The quantity of sub- battery pack is 2, and is all lithium battery group.Charging pole, discharge electrode and the anode of each sub- battery pack are connected respectively to
On the busbar of power-supply system, charging busbar is shared with feed (electric discharge) busbar.
Sub- battery pack can be in 2 kinds of working statuses in the power supply system in the present embodiment：" preparing to use " and " stand-by heat ".
" prepare with " state can be understood as：As UBAT1 (UBAT2)–U0<UDW1(UDW2), battery pack is not presented to external loading
Power transmission energy.It is the situation that the high battery pack of port voltage is outwards fed forever that the state, which had both avoided battery pack,.Play again pair
The standby effect of power lead power supply, works as UBAT1(UBAT2)–U0>=UDW1(UDW2), battery pack can outwards be fed at once, be improved
The continuous power supply reliability of power lead.
" stand-by heat " state can be understood as：Battery pack accesses power lead through diode, when busbar voltage is less than battery
During group terminal voltage, battery pack just feeds electric energy to external loading.
The BMS of sub- battery pack configuration, is the core component of sub- battery pack operational management, on the one hand its load based on battery pack
Lotus buret manages charging, the discharge process for controlling battery pack；On the other hand, used between the BMS of the sub- battery pack of parallel operation
CAN2.0B agreements are in communication with each other, and interaction operation information, receives and perform the order of other side, allow more sub- battery pack co-ordinations,
Form high-new energy, a highly reliable assembled battery group.
Wherein, BMS1 be used to managing the SOC% for controlling sub- battery pack B1 (State of Charge, state-of-charge/or
Remaining capacity), BMS2 management controls SOC%, BMS1 and the BMS2 of sub- battery pack B2 to be connected and use by CAN bus
CAN2.0B agreements are in communication with each other.
K1A be sub- battery pack B1 charging control switch, K1B be sub- battery pack B1 feed controlling switch, and K1A and
K1B is the solid-state high-speed switch for having unilateal conduction characteristic.K2A is the charging control switch of sub- battery pack B2, and K2B is son electricity
The feed controlling switch of pond group B2, and K2A and K2B are the solid-state high-speed switches for having unilateal conduction characteristic.
Specifically, BMS1 is used to manage the SOC%, battery current I for controlling sub- battery pack B11, battery pack port voltage
For UBAT1, K1A charging control switches, K1B feed controlling switches.K1A, K1B are that the solid-state with unilateal conduction characteristic is quickly opened
Close.BMS2 management controls the SOC%, battery current I of sub- battery pack B22, battery pack port voltage UBAT2, K2A charge controls open
Close, K2B feed controlling switches.K2A, K2B are the solid-state high-speed switches for having unilateal conduction characteristic.Io is load current.
Under usual operating mode, sub- battery pack B1, sub- battery pack the B2 fully charged (SOC% under respective BMS management>90%),
K1A and K2A is in open position.1 is in " stand-by heat " operating mode；One in " preparing to use " operating mode.At this time, power-supply system
Load current is provided by high-frequency switch module, and the output voltage of high-frequency switch module is the DC bus-bar voltage in power-supply system
U0, its numerical value is " floating charge " magnitude of voltage set in power-supply system, sets reference value to be generally 3.40V × n, n is sub- battery pack
Middle monomer concatenates number.
In the present embodiment, the sharing of load process of the battery pack includes：
The initiation event of the battery power discharge process is：When external communication dead electricity occurs for DC power system, high frequency
Rectification module is without output current, system dc busbar voltage U at this time0Begin to decline, work as U0<UBAT1(UBAT2) when, external loading electricity
Stream is provided by the sub- battery pack in " stand-by heat " operating mode, UBAT1(UBAT2) be sub- battery pack full and down when standing voltage, i.e.,
3.35V × n, n are that monomer concatenates number in sub- battery pack.DC power system enters battery-powered mode.Sub- battery pack in parallel
Between sharing of load, employ the segmented load distribution method of the present invention based on load capacity.It is described to be based on load capacity
The mode of segmented sharing of load include：Sub- battery pack load capacity is preferential discharge section in 100%~80% section.80%~
30% section is section of suitably discharging.Less than 30% is limitation electric discharge section.
Information exchange of following sub- battery pack Control System of Load Distribution by sub- battery pack BMS by CAN bus, sub- BMS controls
System performs completion, miscellaneous part or monitoring system independent of DC power system.
In the present embodiment, sub- battery pack load condition and load capacity change curve are as shown in Fig. 2, the battery pack is born
Lotus allocation step 201：After the initiation event of discharge process occurs for the battery pack, sub- battery pack B2 is in " preparing to use " operating mode,
Its load remain unchanged (>90%).Sub- battery pack B1 powers to load, and the real-time monitoring port voltages of BMS1, BMS1 is monitored in real time
Port voltage, when port voltage is less than (3.310V~3.320V) × n-RWI0When × 1.25, i.e., sub- battery pack B1 load capacities decline
During to 80%, handover request is sent from BMS1 to BMS2, the battery pack starts first time load switching.BMS2 receives BMS1's
After handover request, BMS2 control closure K2B, battery pack B2 be transferred to it is main supply pattern, detect that the battery pack outwards carries in BMS2
During for electric current, the request message for disconnecting K1B is sent to BMS1.After BMS1 receives the request message of the disconnection K1B, institute is detected
State battery pack current I1<During 0.2A, BMS1 controls disconnect K1B, and sub- battery pack B1 is transferred to " preparing to use " operating mode.The battery pack is complete
Into the first time load switching.
In the present embodiment, sub- battery pack load condition and load capacity change curve are as shown in Fig. 2, the battery pack is born
Lotus allocation step 202：After the battery pack completes the first time load switching, sub- battery pack B1 is in " preparing to use " operating mode,
Its load remain unchanged (<80%).Sub- battery pack B2 powers to load, and the real-time monitoring port voltages of BMS1, BMS2 is monitored in real time
The port voltage of battery pack B2, when port voltage is less than (3.310V~3.320V) × n-RWI0When × 1.25, i.e., sub- battery pack B2
When load capacity drops to 80%, BMS2 sends handover request to BMS1, and the battery pack starts second of load switching.BMS1 is received
To after the handover request of BMS2, BMS1 control closure K1B, sub- battery pack B1 be transferred to it is main supply pattern, detect battery pack in BMS1
When being provided out electric current, the request message for disconnecting K2B is sent to BMS2.After BMS2 receives the request message of the disconnection K2B, inspection
Measure battery pack current I2<During 0.2A, BMS2 control controls disconnect K2B, and sub- battery pack B2 is transferred to " preparing to use " operating mode.The electricity
Pond group completes second of load switching.
In the present embodiment, sub- battery pack load condition and load capacity change curve are as shown in Fig. 2, the battery pack is born
Lotus allocation step 203：After the battery pack completes second of load switching, sub- battery pack B2 is in " preparing to use " operating mode,
Its load remain unchanged (<80%).Sub- battery pack B1 powers to load, the real-time monitoring port voltages of BMS1, when port voltage is small
In (3.280V~3.290V) × n-RWI0When × 1.25, i.e., when sub- battery pack B1 load capacities drop to 30%, BMS1 is sent out to BMS2
Go out handover request, the battery pack starts third time load switching.After BMS2 receives the handover request of BMS1, BMS2 control closures
K2B, battery pack B2 be transferred to it is main supply pattern, when BMS2 detects that the battery pack is provided out electric current, disconnection is sent to BMS1
The request message of K1B.After BMS1 receives the request message of the disconnection K1B, the battery pack current I is detected1<During 0.2A,
BMS1 controls disconnect K1B, and sub- battery pack B1 is transferred to " preparing to use " operating mode.The battery pack completes the third time load switching.
In the present embodiment, sub- battery pack load condition and load capacity change curve are as shown in Fig. 2, the battery pack is born
Lotus allocation step 204：After the battery pack completes the third time load switching, sub- battery pack B1 is in " preparing to use " operating mode,
Its load remain unchanged (<30%).Sub- battery pack B2 powers to load, the real-time monitoring port voltages of BMS2, when port voltage is small
In (3.280V~3.290V) × n-RWI0When × 1.25, i.e., when sub- battery pack B2 load capacities drop to 30%, BMS2 is sent out to BMS1
Go out handover request, the battery pack starts the 4th load switching.After BMS1 receives the handover request of BMS2, BMS1 control closures
K1B.Battery pack B1 is transferred to " stand-by heat " state and battery pack B2 while is in " stand-by heat ", and the battery pack completes the described 4th
Secondary load switching.Under this state, 2 sub- battery packs enter ideal diode parallel operation state, and the distribution of external load is by 2
The parameters such as the internal resistance of sub- battery pack, port voltage are independently distributed, and 2 sub- battery pack load capacities alternately decline.
It is in parallel using the lithium battery group load in parallel using lithium battery group point in power-supply system provided in an embodiment of the present invention
Method of completing the square, propose in electric operating power supply system can be in parallel lithium battery group, realize each sub- battery pack each other without electric energy
Exchange, produced so as to avoid circulation.Also, independent BMS is configured with for sub- battery pack, the observing and controlling of sub- battery pack is by itself
BMS is completed, external command received by CAN bus, analyze after perform.The lithium battery group of the present invention, which is configured with, independent fill, puts
Electric control switch, two switches do not interfere with mutual working status under operating mode in parallel：Battery pack in the discharged condition, charges
Dividing, closing for switch, will not change the discharge condition of battery pack.Battery pack in charging, discharge switch point, contract sample will not change
Become the charged state of battery pack, as long as realizing, 2 rated voltages are identical, are mounted with the battery sets in parallel operation of same BMS,
Extenuate the problem of technical staff needs constantly to adjust battery pack in follow-up maintenance, reduce battery pack in power-supply system
Maintenance cost.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.It is real especially for equipment
For applying example, since it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to embodiment of the method
Part explanation.The above description is merely a specific embodiment, but protection scope of the present invention is not limited to
This, any one skilled in the art the invention discloses technical scope in, the change that can readily occur in or replace
Change, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claim
Subject to enclosing.
Claims (8)
- A kind of 1. load distribution method in parallel applied between lithium battery group in power-supply system, it is characterised in that including：Lithium battery group And battery management system；The lithium battery group includes 2 sub- battery packs, and every sub- battery pack includes a charging pole, a discharge electrode and a public affairs Anode；Wherein, the charging control switch for the cathode configuration unilateal conduction characteristic that charges, and battery pack described in current direction；The discharge control switch for cathode configuration unilateal conduction characteristic of discharging, and current direction external loading；The sub- battery pack of the lithium battery group is configured with respective battery management system (BMS), and is used between each BMS CAN2.0B agreements are in communication with each other, and in order to exchange the operation and control information of each sub- battery pack, realize the load point of sub- battery pack Match somebody with somebody, the sharing of load of the sub- battery pack includes：The sub- battery pack " electric discharge " or " preparing to use " State Transferring control.
- 2. according to the method described in claim 1, it is characterized in that:Load capacity estimation based on battery pack port voltage, 80% decision condition of load capacity are：UBAT<(3.310V~3.320V) × n-RWI0 × 1.25, wherein, UBAT is battery pack port voltage, and n is that monomer concatenates number in battery pack, and RW is the battery pack Total stable state internal resistance, I0 are load currents.
- 3. according to the method described in claim 2, it is characterized in that:Load capacity estimation based on battery pack port voltage, 30% decision condition of load capacity are：UBAT<(3.280V~3.290V) ×n-RWI0×1.25。
- 4. the according to the method described in claim 1, it is characterized in that, method of the segmented sharing of load based on load capacity Including：The sub- battery pack load capacity is preferential discharge section in 100%~80% section；The sub- battery pack load capacity is section of suitably discharging in 80%~30% section；The sub- battery pack load capacity is limitation electric discharge section below 30%；The BMS of 2 sub- battery packs, by CAN bus, carries out state information exchange, protocol integrated test system, is realized negative according to loaded-up condition Lotus is distributed；When 2 sub- battery packs are all in full and down, or load capacity is more than 90%, a sub- battery pack is in " stand-by heat " work Condition, another is in " preparing to use " operating mode；When external communication dead electricity occurs, the sub- battery in " stand-by heat " state starts to provide electric current to load, outwards feed, Load capacity starts to reduce (from 100% to 80%)；Another keeps " preparing to use " state, and load capacity is remained above 90% shape State.
- 5. according to the method described in claim 4, it is characterized in that：When the sub- battery pack load capacity outwards fed drops to 80% When, start the load switching between the first second son battery pack, original place enters " hot standby in the sub- battery pack control of " preparing to use " state With " state, external load is undertaken, load capacity is begun to decline, and specifically from 100% to 80% declines；The sub- battery pack that original undertakes load enters " preparing to use " state, and load capacity remains less than 80% state.
- 6. according to the method described in claim 5, it is characterized in that：When the sub- battery pack load capacity outwards fed drops to 80%, start the load switching between the second second son battery pack, it is former Sub- battery pack control in " preparing to use " state enters " stand-by heat " state, undertakes external load, load capacity is begun to decline, tool Body from 100% to 80% declines, and the sub- battery pack that original undertakes load enters " preparing to use " state, and load capacity remains less than<80% State.
- 7. according to the method described in claim 6, it is characterized in that：When the sub- battery pack load capacity outwards fed drops to 30% When, start the load switching between the sub- battery pack of third time, original place enters " hot standby in the sub- battery pack control of " preparing to use " state With " state, external load is undertaken, load capacity is begun to decline, and specifically from 80% to 30% declines, and original undertakes the sub- battery pack of load Into " preparing to use " state, load capacity remains less than 30% state.
- 8. according to the method described in claim 7, it is characterized in that：When the sub- battery pack load capacity outwards fed drops to 30% When, start the load switching between the 4th second son battery pack, original place enters " hot standby in the sub- battery pack control of " preparing to use " state With " state, original place is constant in sub- battery pack holding " stand-by heat " state of feed condition, and 2 sub- battery packs enter preferable two poles Pipe parallel operation state, the distribution of external load are independently distributed by parameters such as the internal resistances of 2 sub- battery packs, port voltages.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110994742A (en) * | 2019-12-27 | 2020-04-10 | 北京兴达智联科技有限公司 | System and method for parallel charging operation of multiple battery packs |
| CN111106648A (en) * | 2019-12-27 | 2020-05-05 | 北京兴达智联科技有限公司 | System and method for parallel discharge operation of multiple battery packs |
| CN114421600A (en) * | 2022-03-11 | 2022-04-29 | 深圳市汇业达通讯技术有限公司 | Subway platform door electrical power generating system |
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| CN110994742A (en) * | 2019-12-27 | 2020-04-10 | 北京兴达智联科技有限公司 | System and method for parallel charging operation of multiple battery packs |
| CN111106648A (en) * | 2019-12-27 | 2020-05-05 | 北京兴达智联科技有限公司 | System and method for parallel discharge operation of multiple battery packs |
| CN110994742B (en) * | 2019-12-27 | 2021-11-19 | 北京兴达智联科技有限公司 | System and method for parallel charging operation of multiple battery packs |
| CN114421600A (en) * | 2022-03-11 | 2022-04-29 | 深圳市汇业达通讯技术有限公司 | Subway platform door electrical power generating system |
| CN114421600B (en) * | 2022-03-11 | 2023-01-31 | 深圳市汇业达通讯技术有限公司 | Subway platform door electrical power generating system |
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| CN107910914B (en) | 2021-01-29 |
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