CN117375135A - Balanced control system of marine container type power supply, method and medium thereof - Google Patents
Balanced control system of marine container type power supply, method and medium thereof Download PDFInfo
- Publication number
- CN117375135A CN117375135A CN202310987340.7A CN202310987340A CN117375135A CN 117375135 A CN117375135 A CN 117375135A CN 202310987340 A CN202310987340 A CN 202310987340A CN 117375135 A CN117375135 A CN 117375135A
- Authority
- CN
- China
- Prior art keywords
- battery
- cluster
- charging
- box
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000007599 discharging Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims description 11
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an equalization control system of a marine container type power supply, a method and a medium thereof, and relates to the technical field of charge and discharge control of the marine container type power supply. The balance control system and the method thereof provided by the invention combine the characteristic of the rapid power-changing mode of the marine box-type power supply, and utilize the unidirectional conductivity of the diode to control the unidirectional flow of energy during discharging, so as to avoid discharge circulation. When in charging, each battery cluster is fully charged in a multi-stage equalizing charging mode, so that the full charge state of each cluster of the box-type power supply is consistent. Compared with the prior scheme of adding 1 DCDC for each cluster, the invention omits a DCDC structure and has obvious cost reduction effect. Compared with the method for charging the power line by the cluster wheel, the method can realize power maximization and greatly save charging time. The invention can control the consistency of the box type power supply on the premise of considering the cost and the efficiency, improve the charge and discharge depth, and improve the cycle efficiency and the cycle life.
Description
Technical Field
The invention belongs to the technical field of box-type power supply control, and particularly relates to a balance control system of a marine container-type power supply, a method and a medium thereof.
Background
In recent years, the development and application of the pure battery power ship form become national strategic deployment of trampling 'carbon reaching peak and carbon neutralization', and are one of important paths for realizing energy conservation, emission reduction and transformation upgrading in the ship industry in China. The container type mobile power supply for the ship is a power source of a large electric ship suitable for a quick power change mode. At present, the battery direct current side of the box-type power supply is often designed into a multi-cluster parallel connection mode, and the problem of unbalanced current exists when a plurality of battery clusters are connected in parallel due to the inconsistency of a temperature field and internal resistance. In the prior art, a DCDC scheme is added between the output end of each battery cluster and a ship direct current bus to solve the problem of unbalanced current, but the cost is too high, the power consumption and the volume are larger, and the control is complex; if each battery cluster is charged in turn until full, the charging time is too long and the efficiency of the charger is not utilized to the maximum. Based on the above, the invention provides a balance control system and a balance control method for a marine container type power supply.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a balance control system, a balance control method and a balance control medium for a marine container type power supply, which can realize an all-weather intra-cluster balance strategy of the container type power supply through the balance control system and the balance control method on the basis of reducing cost, control discharge to be free of circulation, ensure that each battery cluster is uniformly filled during charging, ensure good consistency of the container type power supply after charging, save charging time, improve efficiency and prolong average fault-free working time and service life of the container type power supply.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
on one hand, an equalization control system of a marine container type power supply is disclosed, and comprises a container type power supply control unit, a display, a power connector, a battery cluster direct current bus and a battery system;
the battery system consists of n battery clusters connected in parallel with a battery cluster direct current bus;
the battery cluster comprises a battery cluster management unit, a power distribution unit and a battery unit;
the box-type power supply control unit is respectively in communication connection with the display, the power connector and the battery cluster management unit of each battery cluster in the battery system through communication lines;
the power connector is electrically connected with the battery cluster direct current bus;
the battery units in the battery cluster are electrically connected with the power distribution unit;
the power distribution unit is electrically connected with the battery cluster direct current bus;
the power distribution unit is used for controlling the discharge unidirectional current of the battery unit.
As a preferable technical scheme, the battery units of the battery cluster comprise m battery boxes connected in series; each battery box is provided with a battery acquisition unit which is connected through an acquisition wire harness;
the battery acquisition unit comprises a voltage acquisition unit and a temperature acquisition unit;
the voltage collector comprises an equalizing circuit;
the battery acquisition unit is in communication connection with the battery cluster management unit through a communication line.
As an optimized technical scheme, the power distribution unit of the battery cluster comprises a discharging relay, a charging relay, a pre-charging relay, a resistor and a unidirectional diode;
the discharging relay is connected with the charging relay in series;
the unidirectional diode is connected in parallel with two ends of the charging relay;
the pre-charging relay is connected with the resistor in series and then connected with two ends of the discharging relay in parallel.
On the other hand, an equalization control method based on the equalization control system is provided, wherein the equalization control method comprises a first-level box-type power supply cluster inner-level equalization control method and a second-level box-type power supply cluster inter-level control method;
the first-level box-type power supply cluster inner-level balancing method adopts an all-weather balancing label method, namely: after the box-type power supply is charged, the battery cluster management unit calculates and sorts the voltage of the battery boxes of the battery units of the battery clusters, and before the next charging period, the battery boxes with the highest single voltages being sorted in front are discharged in a passive balancing mode until the next charging is performed, and then the battery boxes are rearranged;
the second-level box-type power supply inter-cluster level control method comprises discharging and charging; wherein, the aspect of discharging: during discharging, only discharging can be performed by controlling the power distribution units in the battery cluster, and countercurrent charging cannot be performed; the aspect of charging: and in the charging process, a multistage equalizing charging method with the highest single voltage as a target is adopted, so that the highest single voltage of each battery box in the battery cluster battery unit is ensured to reach a full charge target value.
As an preferable technical scheme, the first-level box-type power supply cluster inner-level equalization method specifically comprises the following steps:
the box-type power supply control unit controls the power-on self-test of each battery cluster through the battery cluster management unit, and enters a standby state if no fault exists;
when the battery cluster meets the charging condition, the battery cluster is charged according to the first charging requirement of the box-type power supply;
when the highest single voltage of the battery box in the battery cluster battery unit reaches a first target value, the charging requirement of the box type power supply is reduced to a second charging requirement, further, when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement of the box type power supply is reduced to a third charging requirement, and when the highest single voltage of the battery box in the battery cluster battery unit reaches a third target value through the third charging requirement, the battery cluster is considered to be fully charged, and a power distribution unit of the battery cluster turns off a charging and discharging relay to stop charging;
sequencing the highest single voltage of the battery boxes in the battery cluster battery cells at the full charge time, and calculating the average voltage of the battery boxes in the battery cluster battery cells at the full charge time; calibrating an equalization mark for a battery box with a certain difference value higher than the average voltage;
and (3) a battery box with an equalization mark is calibrated in the battery cluster battery unit, an equalization instruction is issued by the battery cluster management unit, the battery acquisition unit executes passive equalization discharge, and the next equalization period is started after a new equalization mark is recalibrated when the battery cluster battery unit is fully charged next time.
As the preferable technical scheme, the balanced discharge capacity of the battery box calibrated with the balanced mark is not more than 1% in a single intra-cluster balanced period.
As a preferable technical solution, the discharging aspect of the second-level box-type power supply inter-cluster level control method is as follows:
when the battery cluster discharges, the box type power supply control unit controls the pre-charging relay to be closed, the charging relay to be opened and the discharging relay to be opened through the battery cluster management unit;
when the battery cluster meets the pre-charge condition, the discharging relay is closed, and the current is discharged outwards through the unidirectional diode.
As an preferable technical solution, the charging aspect of the second-level box-type power supply inter-cluster level control method is as follows:
the box-type power supply control unit controls the power-on self-test of each battery cluster through the battery cluster management unit to acquire the voltage, temperature and SOC data of each battery cluster;
sequencing according to the voltage of each battery cluster, and calculating the pressure difference between the battery clusters;
determining the sequence of closing the charging relay of each battery cluster according to the sequence, and entering a charging state: firstly, closing a charging relay in a power distribution unit of the battery cluster with the lowest voltage, wherein the charging demand current of a box-type power supply is the maximum charging current/total number n of the battery clusters; closing a charging relay in the power distribution unit of the second low-voltage battery cluster when the voltage of the lowest-voltage battery cluster is increased to a voltage difference with the second low-voltage battery cluster to be smaller than 5V; and the like, until the charging power reaches the maximum after the charging relays in all the battery cluster distribution units are closed;
when the highest single voltage of the battery box in a battery unit of a certain battery cluster reaches a first target value, the charging requirement of the box-type power supply is reduced to a second charging requirement, and charging is continued;
when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement of the box-type power supply is reduced to a third charging requirement, and charging is continued;
when the highest single voltage of the battery box in the battery unit of the battery cluster reaches a third target value, judging that the battery cluster is fully charged and exits from a charging state;
disconnecting the charging relay of the battery cluster distribution unit, reducing the charging requirement of the box type power supply to be the third charging requirement, namely the number of the battery clusters being charged/the total number of the battery clusters, and continuing to charge;
and the like, and judging that all the battery clusters are fully charged after the highest single cell voltage of the battery boxes in all the battery cluster battery cells reaches a third target value.
In yet another aspect, a computer-readable storage medium is provided, in which a program is stored, which when executed by a processor, implements the equalization control method described above.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides an equalization control system, a method and a medium thereof for a marine container type power supply, which comprises 2 levels of intra-cluster equalization and inter-cluster equalization of the container type power supply, wherein the inter-cluster equalization is divided into 2 aspects of discharge equalization control and charge equalization control. Compared with the traditional passive equalization, the intra-cluster-level equalization only discharges the battery box with the highest single voltage in the charging stage, and has shorter equalization time and limited effect; the intra-cluster level balancing method provided by the invention has all-weather characteristics, and can dynamically adjust the balancing labels. The inter-cluster level equalization utilizes a power distribution unit to solve the problem of discharge circulation, solves the problem of simultaneous filling of multiple clusters by a charge equalization control method, and avoids inconsistent SOC states among clusters caused by inconsistent current during discharge. The invention can control the balance of the box power supply from inside to outside according to the box power supply, and can comprehensively inhibit the unbalance of the box power supply. Compared with the scheme of adding 1 DC-DC converter for each battery cluster, the method can save cost, reduce volume and efficiency and is convenient for engineering implementation. Compared with the way of alternately charging each battery cluster, the method can greatly save charging time, improve the utilization efficiency of the charger and prolong the average fault-free working time and the service life of the box-type power supply.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of an equalization control system of a marine container type power supply in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a battery cell in a battery cluster according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a power distribution unit in a battery cluster according to an embodiment of the present invention.
Fig. 4 is a flowchart of a first-level box power cluster intra-level balancing method according to an embodiment of the present invention.
Fig. 5 is a flowchart of a second-level box-type power cluster-to-cluster level control method according to an embodiment of the invention.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.
Example 1
Referring to fig. 1, the equalization control system of a marine container type power supply in this embodiment includes a container type power supply control unit, a display, a power connector, a battery cluster dc bus and a battery system;
the battery system consists of n battery clusters connected in parallel with a battery cluster direct current bus; each battery cluster comprises a battery cluster management unit, a power distribution unit and a battery unit; the box-type power supply control unit is respectively in communication connection with the display, the power connector and the battery cluster management unit of each battery cluster in the battery system through communication lines; the power connector is connected with a shore power charger when in charging and is connected with a ship direct current distribution board when in discharging.
The power connector is electrically connected with the battery cluster direct current bus; the battery units in the battery cluster are electrically connected with the power distribution unit, and the power distribution unit is electrically connected with the DC bus of the battery cluster; the power distribution unit is used for discharging unidirectional current control of the battery unit.
In this embodiment, taking the battery cluster 1 as an example, the structure of the battery units of the battery cluster is described, as shown in fig. 2, the battery units 1 of the battery cluster 1 include m battery boxes connected in series, each battery box is configured with a battery acquisition unit, and the battery acquisition units are connected through an acquisition harness; the battery acquisition unit comprises a voltage acquisition unit and a temperature acquisition unit, wherein the voltage acquisition unit comprises an equalization circuit; the battery acquisition unit transmits acquired battery voltage and acquired battery temperature to the battery cluster management unit through an internal communication line, and the box-type power supply control unit performs charge and discharge management.
In this embodiment, taking the battery cluster 1 as an example, the power distribution unit of the battery cluster is described, referring to fig. 3, the power distribution unit 1 of the battery cluster 1 is mainly used for unidirectional current control of discharging, and includes a discharging relay K1, a charging relay K2, a pre-charging relay K3, a unidirectional diode D1 and a resistor R1;
wherein the discharging relay K1 and the charging relay K2 are connected in series; the unidirectional diode D1 is connected in parallel with two ends of the charging relay K2; the pre-charging relay K3 is connected with the resistor R1 in series and then connected with two ends of the discharging relay K1 in parallel.
Example 2
Based on the above-mentioned equalization control system of the container type power supply for the ship, the embodiment provides an equalization control method of the container type power supply for the ship, which comprises a first-level container type power supply cluster inner-level equalization control method and a second-level container type power supply cluster inter-level control method;
the first-level box-type power supply cluster inner-level balancing method adopts an all-weather balancing label method, namely: after the charging of the box-type power supply is finished, the battery cluster management unit calculates and sorts the voltage of the battery boxes of the battery units of the battery clusters, and before the next charging period, the battery boxes with the highest single voltage being sorted in front are discharged in a passive balancing mode until the next charging is finished, and the battery boxes are rearranged, so that the imbalance in the clusters can be restrained, and the box-type power supply is in a more balanced state
The second-level box-type power supply inter-cluster level control method comprises two control aspects of discharging and charging; wherein, in aspect of discharge control: during discharging, only discharging can be performed by controlling the power distribution units in the battery cluster, and countercurrent charging cannot be performed; in the aspect of charging control: and when in charging, a multistage equalizing charging method taking the highest single voltage as a target is adopted, so that the highest single voltage of each battery box in the battery unit of the battery cluster reaches a full charge target value, and the states among the battery clusters are consistent.
Further, as shown in fig. 4, the first-level box-type power cluster intra-level balancing method specifically includes:
s101, controlling each battery cluster to be electrified and self-inspected by a box type power supply control unit through a battery cluster management unit, and entering a standby state if no fault exists;
s102, when a battery cluster meets a charging condition, the battery cluster is charged according to a first charging requirement of a box-type power supply;
s103, when the highest single voltage of the battery box in the battery cluster battery unit reaches a first target value, the charging requirement of the box type power supply is reduced to a second charging requirement, further, when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement in the box type power supply is reduced to a third charging requirement, and when the highest single voltage of the battery box in the battery cluster battery unit reaches a third target value through charging of the third charging requirement, the battery cluster is considered to be fully charged, and a power distribution unit of the battery cluster turns off a charging and discharging relay to stop charging;
s104, sequencing the highest single voltages of the battery boxes in the battery cluster battery cells at the time of full charge, and calculating the average voltage of the battery boxes in the battery cluster battery cells at the time of full charge; calibrating an equalization mark for a battery box with a certain difference value higher than the average voltage;
s105, a battery box with an equalization mark is calibrated in a battery cluster battery unit, an equalization instruction is issued by a battery cluster management unit, the battery cluster management unit executes passive equalization discharge, and the next equalization period is started after a new equalization mark is recalibrated when the battery cluster is fully charged next time.
In order to ensure that the battery box is not charged for a long time after being fully charged once, and the balanced discharge capacity of the battery box marked with the balanced mark is not more than 1% in a single balanced period in a cluster.
Further, the discharging aspect of the second-level box-type power supply inter-cluster level control method is as follows:
when the battery cluster discharges, the box type power supply control unit controls the pre-charging relay to be closed, the charging relay to be opened and the discharging relay to be opened through the battery cluster management unit;
when the battery cluster meets the pre-charge condition, the discharging relay is closed, and the current is discharged outwards through the unidirectional diode. Because of the unidirectional conductivity of the diode, the current of other battery clusters cannot flow into the battery cluster; the distribution unit can effectively block circulation and is economical.
Further, as shown in fig. 5, in the charging aspect of the second-level box-type power supply inter-cluster level control method, the inter-cluster pressure difference is prevented from being larger than the dangerous circulation current in the initial stage of charging, so that the power distribution unit device is damaged, the addition and the withdrawal of the battery clusters can be dynamically managed in stages in the charging stage, the charging current is maximized under the constraint of the highest single target value in three stages, the charging time is saved, and the utilization efficiency of the charger is improved, specifically:
s201, controlling the power-on self-test of each battery cluster by a box type power supply control unit through a battery cluster management unit, and acquiring voltage, temperature and SOC data of each battery cluster;
s202, sequencing according to the voltage of each battery cluster, and calculating the pressure difference between the battery clusters;
s203, determining the sequence of closing the charging relay of each battery cluster according to the sequence, and entering a charging state: firstly, closing a charging relay in a power distribution unit of the battery cluster with the lowest voltage, wherein the charging demand current of a box-type power supply is the maximum charging current/total number n of the battery clusters; closing a charging relay in the power distribution unit of the second low-voltage battery cluster when the voltage of the lowest-voltage battery cluster is increased to a voltage difference with the second low-voltage battery cluster to be smaller than 5V; and the like, until the charging power reaches the maximum after the charging relays in all the battery cluster distribution units are closed;
s204, when the highest single voltage of a battery box in a certain battery cluster battery unit reaches a first target value, the charging requirement of the box type power supply is reduced to a second charging requirement, and charging is continued;
s205, when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement of the box type power supply is reduced to a third charging requirement, and charging is continued;
s206, when the highest single voltage of the battery box in the battery unit of the battery cluster reaches a third target value, judging that the battery cluster is fully charged and exits from a charging state;
s207, disconnecting a charging relay of the battery cluster distribution unit, reducing the charging requirement of the box-type power supply to a third charging requirement, namely the number of the battery clusters being charged/the total number of the battery clusters, and continuing to charge;
and S207, and so on, judging that all the battery clusters are fully charged after the highest single cell voltage of the battery boxes in all the battery cluster battery cells reaches a third target value.
This ends the charging aspect. The charging stage of the battery clusters is divided into three target value stages, each stage dynamically adds and withdraws from the battery clusters, the charging power of each stage is maximized, the charging time is saved, and the utilization efficiency of the charger is improved.
In summary, the invention provides an equalization control method for a container type mobile power supply for a ship, wherein the equalization control method comprises the following steps: intra-cluster level and inter-cluster level. Wherein the inter-cluster level equalization strategy is divided into a discharging control strategy and a charging equalization strategy. The intra-cluster level equalization adopts a dynamic equalization label method to sort the battery voltages at the moment of full charge, and the single bodies with certain values higher than the average voltage are subjected to equalization discharge; the intra-cluster balancing strategy can effectively balance the inconsistency of the monomers in the cluster; inter-cluster level equalization is classified into discharge control and charge equalization. Because the discharge current of each cluster is inconsistent due to the existence of circulation when a plurality of clusters are connected in parallel, a distribution unit for preventing discharge circulation is designed, and energy can only flow out but not flow in during discharge, so that the circulation among clusters during discharge is effectively prevented; when charging, the whole consistency of the box-type power supply can be ensured only by filling the box-type power supply every time. Therefore, the multi-cluster parallel multi-stage multi-target dynamic equalizing charge method can dynamically manage the addition and the withdrawal of the battery clusters in stages in the charge stage, maximize the charge current under the constraint of the highest monomer target value in three stages, and save the charge time. Finally, each cluster is full, and the consistency of the box-type power supply system is ensured. And the operation and maintenance cost is reduced.
It should be noted that, for the sake of simplicity of description, the foregoing method embodiments are all expressed as a series of combinations of actions, but it should be understood by those skilled in the art that the present invention is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present invention.
Example 3
The embodiment provides a computer readable storage medium storing a program, which when executed by a processor, realizes an equalization control method of a container type mobile power supply for a ship, wherein the method comprises a first-level container type power supply cluster inner-level equalization control method and a second-level container type power supply cluster inter-level control method;
the first-level box-type power supply cluster inner-level balancing method adopts an all-weather balancing label method, namely: after the box-type power supply is charged, the battery cluster management unit calculates and sorts the voltage of the battery boxes of the battery units of the battery clusters, and before the next charging period, the battery boxes with the highest single voltages being sorted in front are discharged in a passive balancing mode until the next charging is performed, and then the battery boxes are rearranged;
the second-level box-type power supply inter-cluster level control method comprises two aspects of discharging and charging; discharge aspect: during discharging, only discharging can be performed by controlling the power distribution units in the battery cluster, and countercurrent charging cannot be performed; the aspect of charging: and in the charging process, a multi-stage equalizing charging method taking the highest single voltage as a target is adopted, so that the highest single voltage of each battery cluster is ensured to reach a full charge target value.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (9)
1. The balance control system of the marine container type power supply is characterized by comprising a box type power supply control unit, a display, a power connector, a battery cluster direct current bus and a battery system;
the battery system consists of n battery clusters connected in parallel with a battery cluster direct current bus;
the battery cluster comprises a battery cluster management unit, a power distribution unit and a battery unit;
the box-type power supply control unit is respectively in communication connection with the display, the power connector and the battery cluster management unit of each battery cluster in the battery system through communication lines;
the power connector is electrically connected with the battery cluster direct current bus;
the battery units in the battery cluster are electrically connected with the power distribution unit;
the power distribution unit is electrically connected with the battery cluster direct current bus;
the power distribution unit is used for controlling the discharge unidirectional current of the battery unit.
2. The equalization control system of a marine container power supply of claim 1, wherein the battery cells of said battery cluster comprise m series connected battery boxes; each battery box is provided with a battery acquisition unit which is connected through an acquisition wire harness;
the battery acquisition unit comprises a voltage acquisition unit and a temperature acquisition unit;
the voltage collector comprises an equalizing circuit;
the battery acquisition unit is in communication connection with the battery cluster management unit through a communication line.
3. The equalization control system of a marine container-type power supply of claim 1, wherein the power distribution unit of the battery cluster comprises a discharge relay, a charge relay, a precharge relay, a resistor and a unidirectional diode;
the discharging relay is connected with the charging relay in series;
the unidirectional diode is connected in parallel with two ends of the charging relay;
the pre-charging relay is connected with the resistor in series and then connected with two ends of the discharging relay in parallel.
4. A balance control method based on a balance control system according to any one of claims 1 to 3, characterized in that the balance control method comprises a first-level box-type power supply cluster inner-level balance control method and a second-level box-type power supply cluster inter-level control method;
the first-level box-type power supply cluster inner-level balancing method adopts an all-weather balancing label method, namely: after the box-type power supply is charged, the battery cluster management unit calculates and sorts the voltage of the battery boxes of the battery units of the battery clusters, and before the next charging period, the battery boxes with the highest single voltages being sorted in front are discharged in a passive balancing mode until the next charging is performed, and then the battery boxes are rearranged;
the second-level box-type power supply inter-cluster level control method comprises discharging and charging; wherein, the aspect of discharging: during discharging, only discharging can be performed by controlling the power distribution units in the battery cluster, and countercurrent charging cannot be performed; the aspect of charging: and in the charging process, a multistage equalizing charging method with the highest single voltage as a target is adopted, so that the highest single voltage of each battery box in the battery cluster battery unit is ensured to reach a full charge target value.
5. The equalization control method of claim 4, wherein the first-level box power cluster intra-level equalization method specifically comprises:
the box-type power supply control unit controls the power-on self-test of each battery cluster through the battery cluster management unit, and enters a standby state if no fault exists;
when the battery cluster meets the charging condition, the battery cluster is charged according to the first charging requirement of the box-type power supply;
when the highest single voltage of the battery box in the battery cluster battery unit reaches a first target value, the charging requirement of the box type power supply is reduced to a second charging requirement, further, when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement of the box type power supply is reduced to a third charging requirement, and when the highest single voltage of the battery box in the battery cluster battery unit reaches a third target value through the third charging requirement, the battery cluster is considered to be fully charged, and a power distribution unit of the battery cluster turns off a charging and discharging relay to stop charging;
sequencing the highest single voltage of the battery boxes in the battery cluster battery cells at the full charge time, and calculating the average voltage of the battery boxes in the battery cluster battery cells at the full charge time; calibrating an equalization mark for a battery box with a certain difference value higher than the average voltage;
and (3) a battery box with an equalization mark is calibrated in the battery cluster battery unit, an equalization instruction is issued by the battery cluster management unit, the battery acquisition unit executes passive equalization discharge, and the next equalization period is started after a new equalization mark is recalibrated when the battery cluster battery unit is fully charged next time.
6. The equalization control method of claim 5, wherein the cell box calibrated with the equalization flag has an equalization discharge capacity of no more than 1% within a single intra-cluster equalization period.
7. The equalization control method of claim 4, wherein the discharging aspect of the second-tier box-type power inter-cluster level control method is:
when the battery cluster discharges, the box type power supply control unit controls the pre-charging relay to be closed, the charging relay to be opened and the discharging relay to be opened through the battery cluster management unit;
when the battery cluster meets the pre-charge condition, the discharging relay is closed, and the current is discharged outwards through the unidirectional diode.
8. The equalization control method of claim 4, wherein the charging aspect of the second-tier, box-type power inter-cluster level control method is:
the box-type power supply control unit controls the power-on self-test of each battery cluster through the battery cluster management unit to acquire the voltage, temperature and SOC data of each battery cluster;
sequencing according to the voltage of each battery cluster, and calculating the pressure difference between the battery clusters;
determining the sequence of closing the charging relay of each battery cluster according to the sequence, and entering a charging state: firstly, closing a charging relay in a power distribution unit of the battery cluster with the lowest voltage, wherein the charging demand current of a box-type power supply is the maximum charging current/total number n of the battery clusters; closing a charging relay in the power distribution unit of the second low-voltage battery cluster when the voltage of the lowest-voltage battery cluster is increased to a voltage difference with the second low-voltage battery cluster to be smaller than 5V; and the like, until the charging power reaches the maximum after the charging relays in all the battery cluster distribution units are closed;
when the highest single voltage of the battery box in a battery unit of a certain battery cluster reaches a first target value, the charging requirement of the box-type power supply is reduced to a second charging requirement, and charging is continued;
when the highest single voltage of the battery box in the battery cluster battery unit reaches a second target value, the charging requirement of the box-type power supply is reduced to a third charging requirement, and charging is continued;
when the highest single voltage of the battery box in the battery unit of the battery cluster reaches a third target value, judging that the battery cluster is fully charged and exits from a charging state;
disconnecting the charging relay of the battery cluster distribution unit, reducing the charging requirement of the box type power supply to be the third charging requirement, namely the number of the battery clusters being charged/the total number of the battery clusters, and continuing to charge;
and the like, and judging that all the battery clusters are fully charged after the highest single cell voltage of the battery boxes in all the battery cluster battery cells reaches a third target value.
9. A computer-readable storage medium storing a program, wherein the program, when executed by a processor, implements the equalization control method of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310987340.7A CN117375135B (en) | 2023-08-07 | 2023-08-07 | Balanced control system of marine container type power supply, method and medium thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310987340.7A CN117375135B (en) | 2023-08-07 | 2023-08-07 | Balanced control system of marine container type power supply, method and medium thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117375135A true CN117375135A (en) | 2024-01-09 |
| CN117375135B CN117375135B (en) | 2024-07-02 |
Family
ID=89388142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310987340.7A Active CN117375135B (en) | 2023-08-07 | 2023-08-07 | Balanced control system of marine container type power supply, method and medium thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117375135B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008061364A (en) * | 2006-08-31 | 2008-03-13 | Meidensha Corp | Power storage device |
| KR101482147B1 (en) * | 2013-11-11 | 2015-01-14 | 공주대학교 산학협력단 | Balencing controller for battery management systme |
| CN110571886A (en) * | 2019-09-12 | 2019-12-13 | 上海电气国轩新能源科技有限公司 | control method and system for voltage balance of battery system |
| CN112193122A (en) * | 2019-07-08 | 2021-01-08 | 北京德意新能科技有限公司 | Chrysanthemum chain structure battery management system applied to energy storage system |
| CN113595180A (en) * | 2021-07-16 | 2021-11-02 | 风帆有限责任公司 | Power battery device |
| WO2022111555A1 (en) * | 2020-11-25 | 2022-06-02 | 中国第一汽车股份有限公司 | Capacity equalizing method and apparatus for battery replacement battery, and device and storage medium |
| CN115123022A (en) * | 2022-06-22 | 2022-09-30 | 力神（青岛）新能源有限公司 | Passive equalization control method for lithium iron battery system of electric vehicle |
| CN115986893A (en) * | 2023-02-24 | 2023-04-18 | 远东电池江苏有限公司 | Battery system and multi-cluster balanced operation method |
| CN116031979A (en) * | 2022-12-30 | 2023-04-28 | 蜂巢能源科技(无锡)有限公司 | Balanced control method of energy storage system |
| CN116470603A (en) * | 2023-03-20 | 2023-07-21 | 上海奥米嘉能源科技有限公司 | Method for preventing circulation of battery clusters in parallel connection |
| CN116545080A (en) * | 2023-07-07 | 2023-08-04 | 深圳海辰储能控制技术有限公司 | Battery charging control method, control device, energy storage system and storage medium |
-
2023
- 2023-08-07 CN CN202310987340.7A patent/CN117375135B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008061364A (en) * | 2006-08-31 | 2008-03-13 | Meidensha Corp | Power storage device |
| KR101482147B1 (en) * | 2013-11-11 | 2015-01-14 | 공주대학교 산학협력단 | Balencing controller for battery management systme |
| CN112193122A (en) * | 2019-07-08 | 2021-01-08 | 北京德意新能科技有限公司 | Chrysanthemum chain structure battery management system applied to energy storage system |
| CN110571886A (en) * | 2019-09-12 | 2019-12-13 | 上海电气国轩新能源科技有限公司 | control method and system for voltage balance of battery system |
| WO2022111555A1 (en) * | 2020-11-25 | 2022-06-02 | 中国第一汽车股份有限公司 | Capacity equalizing method and apparatus for battery replacement battery, and device and storage medium |
| CN113595180A (en) * | 2021-07-16 | 2021-11-02 | 风帆有限责任公司 | Power battery device |
| CN115123022A (en) * | 2022-06-22 | 2022-09-30 | 力神（青岛）新能源有限公司 | Passive equalization control method for lithium iron battery system of electric vehicle |
| CN116031979A (en) * | 2022-12-30 | 2023-04-28 | 蜂巢能源科技(无锡)有限公司 | Balanced control method of energy storage system |
| CN115986893A (en) * | 2023-02-24 | 2023-04-18 | 远东电池江苏有限公司 | Battery system and multi-cluster balanced operation method |
| CN116470603A (en) * | 2023-03-20 | 2023-07-21 | 上海奥米嘉能源科技有限公司 | Method for preventing circulation of battery clusters in parallel connection |
| CN116545080A (en) * | 2023-07-07 | 2023-08-04 | 深圳海辰储能控制技术有限公司 | Battery charging control method, control device, energy storage system and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117375135B (en) | 2024-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107611966B (en) | Active power distribution network power supply capacity evaluation method considering difference reliability | |
| CN204269787U (en) | The conforming detection system of a kind of lithium ion battery cryogenic property | |
| CN104993602A (en) | Modular energy storage system | |
| CN106300530B (en) | Multiclass accumulator is used in mixed way method | |
| CN103051028A (en) | Dynamic equalizing charging method for electric automobile | |
| CN114726033A (en) | Battery system charging and discharging control method based on dynamic reconfigurable battery network | |
| CN107618397A (en) | Battery management system | |
| CN113394840A (en) | Intelligent balance control method and system for electric quantity of energy storage battery | |
| CN115764849A (en) | Hybrid energy storage capacity optimal configuration method and configuration system thereof | |
| CN101976744A (en) | Charging and discharging method for secondary battery | |
| CN108171407B (en) | Energy storage demand evaluation method, system, terminal and readable storage medium | |
| CN117375135B (en) | Balanced control system of marine container type power supply, method and medium thereof | |
| CN116581805B (en) | Control optimization method for electric power energy storage and battery network | |
| CN117375048A (en) | Power distribution method for multi-objective optimized energy storage system | |
| CN109066833A (en) | The LiFePO4 standby battery group charging method for inhibiting overcurrent to generate | |
| CN117081119A (en) | Power distribution network operation optimization method and system under cooperative access of multiple energy storage | |
| CN101964431B (en) | Multi-stage constant-voltage charging method of lithium secondary battery | |
| CN111596219A (en) | Estimation method for SOC of energy storage battery pack | |
| CN208508574U (en) | Active battery pack equalization system of 48V system | |
| CN110896246A (en) | Configuration optimization method of hybrid energy storage type tramcar system | |
| CN110829530A (en) | Battery pack performance balancing method and system | |
| CN113933736B (en) | Battery pack consistency evaluation method based on cloud discharge data | |
| CN115693847A (en) | Series battery pack group equalization control method based on K-means clustering | |
| CN109164396A (en) | A kind of real-time ferric phosphate lithium cell life consumption appraisal procedure | |
| CN115514043A (en) | Lithium iron phosphate battery pack, voltage equalization method thereof, vehicle and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |