CN112713633A - Battery charging and discharging management method and battery charging and discharging management system - Google Patents
Battery charging and discharging management method and battery charging and discharging management system Download PDFInfo
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- CN112713633A CN112713633A CN202011596481.9A CN202011596481A CN112713633A CN 112713633 A CN112713633 A CN 112713633A CN 202011596481 A CN202011596481 A CN 202011596481A CN 112713633 A CN112713633 A CN 112713633A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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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- 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
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- 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 battery charge and discharge management method and a battery charge and discharge management system, wherein the battery charge and discharge management method is used for charge and discharge management of a multi-path parallel battery, and the charging method comprises a common charging mode and a single charging mode; in the common charging mode, all the batteries are charged simultaneously according to the respective set charging parameters; and in the single charging mode, all the batteries are sequentially charged according to the set charging priority. The discharging method comprises a common discharging mode and a priority discharging mode; when in the common discharge mode, the discharge current of each branch circuit is adjusted according to the discharge capacity of the battery in each branch circuit, and each branch circuit battery discharges according to the discharge capacity proportion; and in the priority discharging mode, the discharging priorities of different batteries are set, and when the mains supply is powered off, the batteries are sequentially discharged according to the discharging priorities. The independent management of charging and discharging of each battery is realized, the safe charging and discharging management of independent control of batteries with different capacities, manufacturers and models is realized, the aim of parallel operation of multiple groups of batteries is fulfilled, and constant voltage output is realized.
Description
Technical Field
The present invention relates to a battery charging/discharging system, and more particularly, to a battery charging/discharging management method and a battery charging/discharging management system.
Background
The same kind of battery has slight difference in charge and discharge characteristics due to the relation of manufacturing process, and different kinds of battery have larger difference in charge and discharge characteristics, and in addition, the capacity and discharge rate of the battery can drift in the use process, if the batteries with different charge and discharge characteristics are mixed together for use, the charge and discharge process needs to be strictly monitored and managed, the phenomena of overcharge, overdischarge and reverse charge are prevented, and therefore the effectiveness and the service life of the battery are improved.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly provides a battery charging and discharging management method and a battery charging and discharging management system.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a battery charge and discharge management method for charge and discharge management of multiple parallel batteries, the charging method including a common charge mode and a single charge mode; when the battery is in the common charging mode, the batteries are charged simultaneously according to the set charging parameters; and when the single charging mode is adopted, the batteries are sequentially charged according to the set charging priority.
The technical scheme is as follows: when the common charging mode is selected, all the batteries are charged simultaneously according to the charging parameters set by the batteries, so that the batteries are charged simultaneously and managed independently, when the single charging mode is selected, the batteries are charged according to the charging priority, the charging priority can be defined by a user, and if the priority is set according to the capacity or the residual electric quantity of the batteries, the quick and reliable power supply of the battery pack can be ensured, and the independent management of the charging of each battery is also realized. The charging method realizes the safe charging management of independent control of batteries with different capacities, manufacturers and models.
In a preferred embodiment of the present invention, during the charging process, when the battery charging voltage is in the set voltage interval, the battery is charged with the preset maximum charging current.
The technical scheme is as follows: quick and safe charging is realized.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a battery charge and discharge management method for charge and discharge management of a multi-path parallel battery, the discharge method including a common discharge mode and a priority discharge mode; when the batteries are in the common discharge mode, the discharge current of each branch circuit is adjusted according to the discharge capacity of the batteries in each branch circuit, so that the batteries in each branch circuit are discharged according to the discharge capacity ratio; when the power supply is in a priority discharging mode, discharging priorities of different batteries are set, and when the mains supply is powered off, the batteries are sequentially discharged according to the discharging priorities.
The technical scheme is as follows: when the batteries are in a common discharge mode, the independent control management of the discharge of the parallel batteries is realized, and the batteries in each branch circuit are discharged according to the proportion of the discharge capacity, so that the batteries can be protected from over-discharge, and the independent management of the discharge of each battery is realized; when the priority discharge mode is adopted, the discharge priority can be defined by a user, for example, the priority is set according to the capacity of the battery or the residual electric quantity, so that the battery pack can be ensured to discharge quickly and reliably, and the independent management of the discharge of each battery is realized. The discharging method realizes the safe and reliable common discharge or the discharge according to the discharging priority of the batteries with different capacities (including rated capacity and actual residual capacity), different manufacturers and different types.
In a preferred embodiment of the present invention, the common discharging mode includes an automatic mode and a manual mode; when the system is in an automatic mode, the discharging current of the battery in each branch circuit is adjusted according to the rated discharging capacity of the battery in each branch circuit in the initial stage, so that the battery in each branch circuit is discharged according to the proportion of the rated discharging capacity, the core capacity of all batteries is periodically completed, and the discharging is performed according to the proportion of the actual discharging capacity of the battery after the core capacity of all batteries is completed each time; and when the battery is in the manual mode, the discharge current of each branch circuit is adjusted according to the rated discharge capacity of the battery in each branch circuit, so that each branch circuit battery is discharged according to the proportion of the rated discharge capacity.
The technical scheme is as follows: the discharging balancing method has the advantages that discharging is carried out according to the actual discharging capacity of the discharging shunt batteries in the working process of the common discharging mode, discharging balancing of the discharging shunt batteries is achieved, and the discharging shunt batteries are protected.
In a preferred embodiment of the present invention, in the priority discharge mode, when the high discharge priority battery discharge is terminated; or the maximum discharge capacity of the high-discharge priority battery can not meet the load power demand; or when the high-discharge priority battery fails and cannot support the load power supply requirement, the low-discharge priority battery is discharged.
The technical scheme is as follows: the battery is discharged according to the discharging priority in the priority discharging mode.
In a preferred embodiment of the present invention, the battery is output in a constant voltage manner when the discharge current is less than the current limit value during discharge, and in a current limit manner when the discharge current reaches the current limit value.
The technical scheme is as follows: the constant voltage output of the parallel battery pack is realized, the voltage fluctuation on a direct current bus during standby power is reduced, the constant voltage output is firstly realized, and when the discharge current is reduced to reach a current limiting value, the battery is output in a current limiting mode, so that the electric quantity of the battery is completely discharged.
In a preferred embodiment of the present invention, when the battery is outputting in a current limiting manner, if the battery voltage drops to a low voltage threshold, the battery discharge circuit is cut off.
The technical scheme is as follows: the battery is protected and the over-discharge is avoided.
In order to achieve the above object, according to a third aspect of the present invention, there is provided a battery charging and discharging management system, including a plurality of batteries connected in parallel, an electrical signal sampling unit, input terminals of the electrical signal sampling unit are respectively connected to power ports of all the batteries, and the power ports of all the batteries are connected to a common input/output terminal; the monitoring unit acquires the charge and discharge current and voltage of all the batteries acquired by the electric signal sampling unit and performs charge management and discharge management according to the battery charge and discharge management method.
The technical scheme is as follows: the voltage and the current of each battery branch circuit are controlled, the independent management of the charging and discharging processes of each group of batteries is realized, the aim of parallel operation of a plurality of groups of batteries is achieved, and constant voltage output is realized.
In a preferred embodiment of the present invention, the electrical signal sampling unit, the monitoring unit and the battery are all disposed in a machine frame, and the machine frame has a connection port connected to the common input and output terminals.
The technical scheme is as follows: the modularization is realized, and the installation and the connection are convenient.
In a preferred embodiment of the present invention, the monitoring unit includes battery charge and discharge management modules corresponding to the batteries one to one;
the battery charging and discharging management module comprises a boosting unit, a discharging current limiting unit, a charging current limiting unit, a change-over switch, a second switch and a management unit; the switching switch comprises a movable contact and three fixed contacts, a power port of the battery is connected with the movable contact of the switching switch, a first fixed contact of the switching switch is connected with the public input and output end sequentially through the discharging current-limiting unit and the boosting unit, the second switch is connected with the boosting unit in parallel, a second fixed contact of the switching switch is connected with the public input and output end through the charging current unit, and a third fixed contact of the switching switch is suspended; the information acquisition end of the management unit is connected with the output end of the electric signal sampling unit, the first control end of the management unit is connected with the control end of the change-over switch, the second control end of the management unit is connected with the control end of the second switch, the third control end of the management unit is connected with the control end of the discharge current-limiting unit, the fourth control end of the management unit is connected with the control end of the charge current-limiting unit, all the management units are connected through a communication interface to form a charge-discharge management network, and batteries are charged and discharged cooperatively through the charge-discharge management network according to the battery charge-discharge management method provided by the invention.
The technical scheme is as follows: the independent management of charging and discharging of each battery is realized through the battery charging and discharging management module of each battery, and the cooperative management of charging and discharging of all batteries connected in parallel is realized through the charging and discharging management network. And the battery charging and discharging management module has simple structure, easy management and lower cost, and can carry out bidirectional current limiting.
Drawings
Fig. 1 is a schematic structural diagram of a battery charging/discharging management system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery charging/discharging management module according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The invention discloses a battery charge and discharge management method, which is used for charge and discharge management of a plurality of paths of batteries connected in parallel, and comprises a common charge mode and a single charge mode; when the battery is in the common charging mode, the batteries are charged simultaneously according to the set charging parameters; and when the single charging mode is adopted, the batteries are sequentially charged according to the set charging priority.
In the present embodiment, the charging parameters of the battery preferably include, but are not limited to, a charging current range, a charging cutoff voltage, a rated charging current, a charging cutoff current, a precharge voltage, and the like. When the voltage of the battery is detected to be lower than the pre-charging voltage, the battery is charged by the pre-charging current, when the voltage of the battery is larger than the pre-charging voltage, the charging current is controlled within the charging current range, and when the voltage of the battery reaches a charging cut-off voltage and/or the charging current is detected to be the charging cut-off current, the battery is stopped being charged. The capacity, manufacturer and model of the parallel batteries can be different, the charging parameters set by each battery can be different, and the parallel batteries can be set by themselves according to the capacity, manufacturer and model of the batteries. In the common charging mode and the single charging mode, each battery is charged according to the charging parameters set by the battery, so that the parallel batteries are charged simultaneously and are managed independently.
In the present embodiment, the charging priority is preferably, but not limited to, set according to the rated capacity of the battery, for example, the charging priority is higher when the rated capacity is larger, or set according to the actual remaining capacity of the battery, for example, the charging priority is higher when the remaining capacity is smaller, or set by the manufacturer of the battery.
In a preferred embodiment, during the charging process, when the battery charging voltage is in a set voltage interval, the battery is charged with a preset maximum charging current.
In the present embodiment, a safe voltage interval of the battery is set in advance, and the battery is charged with the maximum allowable charge current, thereby realizing rapid charging.
The invention also discloses a battery charge and discharge management method, which is used for charge and discharge management of the multi-path parallel battery, and the discharge method comprises a common discharge mode and a priority discharge mode; when the battery is in the common discharge mode, the discharge current of each branch circuit is adjusted according to the discharge capacity of each branch circuit battery, so that each branch circuit battery is discharged according to the discharge capacity proportion; when the power supply is in a priority discharging mode, discharging priorities of different batteries are set, and when the mains supply is powered off, the batteries are sequentially discharged according to the discharging priorities.
In this embodiment, in the common discharge mode, the unit of the battery discharge capacity is ampere, and includes a rated discharge capacity and an actual discharge capacity, where the rated discharge capacity is the battery rated capacity × the discharge capacity coefficient, and the actual discharge capacity is the actual discharge capacity (i.e., the actual battery capacity) × the discharge capacity coefficient. The shunt batteries are discharged according to the discharge capacity proportion, and the discharge current proportion of each discharge shunt is the same as the discharge capacity proportion of each shunt battery, so that balanced discharge of each shunt can be realized.
In the present embodiment, the discharge priority is preferably, but not limited to, set according to the rated capacity of the battery, that is, the discharge priority is higher as the rated capacity of the battery is larger, or set according to the actual capacity of the battery, that is, the discharge priority is higher as the actual capacity of the battery is larger, or set by the user according to information such as the manufacturer of the battery.
In a preferred embodiment, the common discharge mode includes an automatic mode and a manual mode;
when the system is in an automatic mode, the discharging current of the battery in each branch circuit is adjusted according to the rated discharging capacity of the battery in each branch circuit in the initial stage, so that the battery in each branch circuit is discharged according to the proportion of the rated discharging capacity, the core capacity of all batteries is periodically completed, and the discharging is performed according to the proportion of the actual discharging capacity of the battery after the core capacity of all batteries is completed each time; except that the batteries of each branch circuit are discharged according to the proportion of rated discharge capacity in the initial stage, after the actual capacity of all the batteries is verified each time later, each branch circuit is discharged according to the proportion of the actual discharge capacity of the batteries, so that the balance effect of the parallel batteries is better.
And when the battery is in the manual mode, the discharge current of each branch circuit is adjusted according to the rated discharge capacity of the battery in each branch circuit, so that each branch circuit battery is discharged according to the proportion of the rated discharge capacity. In the manual mode, the individual shunt cells are discharged at a fixed rate of rated discharge capacity throughout the discharge process.
In a preferred embodiment, in the priority discharging mode, when the discharging of the high-discharging priority battery is terminated, the discharging can be determined by collecting the voltage and/or current of the discharging loop of the high-discharging priority battery; or the maximum discharge capacity of the high-discharge priority battery cannot meet the load power demand, at the moment, the battery with the latter discharge priority can be added in parallel for simultaneous discharge, preferably, the maximum discharge capacity of the high-discharge priority battery cannot meet the load power demand by determining according to the voltage or current state of a load power supply loop, and if the voltage is too low or the current exceeds the actual discharge capacity of the high-discharge priority battery, the maximum discharge capacity of the high-discharge priority battery cannot meet the load power demand; or when the high-discharge priority battery fails and cannot support the load power supply requirement, the low-discharge priority battery discharges, and the battery failure can be obtained through battery reporting.
In a preferred embodiment, when discharging, the battery outputs in a constant voltage manner when the discharge current is less than the current limit value, and when the discharge current reaches the current limit value, the battery outputs in a current limit manner.
In this embodiment, the current limit value is preferably, but not limited to, smaller than the rated discharge capacity of the battery, and may be the actual discharge capacity when the battery capacity is any value within the range of 20% to 50% of the full capacity, when the discharge current is smaller than the current limit value, the battery capacity may be considered sufficient, when the discharge current reaches the current limit value, the battery capacity may be considered low, and at this time, the current limit mode is adopted for output, so that the battery can be protected from over-discharge.
In a preferred embodiment, when the battery is outputted in the current limiting manner, if the battery voltage decreases to the low voltage threshold, the battery discharging circuit is cut off, and the battery discharging is finished, and the low voltage threshold can be preset according to the product data of the battery.
The invention also discloses a battery charging and discharging management system, which comprises a plurality of batteries connected in parallel and an electric signal sampling unit in a preferred embodiment, wherein the input end of the electric signal sampling unit is respectively connected with the power supply ports of all the batteries, and the power supply ports of all the batteries are connected with the common input and output end; the monitoring unit acquires the charge and discharge current and voltage of all the batteries acquired by the electric signal sampling unit, performs charge management according to the battery charge and discharge management method, and performs discharge management according to the battery charge and discharge management method.
In the present embodiment, a battery collection module for testing the charging current, the discharging current, and the battery voltage is provided inside the battery. The electric signal sampling unit acquires the charging current, the discharging current and the battery voltage of the battery acquired by the battery acquisition module through a power port of the battery, stores and arranges the charging current, the discharging current and the battery voltage, and then outputs the charging current, the discharging current and the battery voltage to the monitoring unit, and the monitoring unit controls the charging and discharging of the battery according to the information. The common input and output terminals are preferably, but not limited to, direct current buses.
In a preferred embodiment, the intelligent monitoring system further comprises a machine frame, wherein the electric signal sampling unit, the monitoring unit and the battery are arranged in the machine frame, and the machine frame is provided with a connecting port connected with the common input and output end. The frame is preferably but not limited to a hollow-out type case structure.
In a preferred embodiment, the monitoring unit comprises battery charging and discharging management modules corresponding to the batteries one by one, and each battery is assigned with one battery charging and discharging management module; as shown in fig. 2, the battery charging and discharging management module includes a voltage boosting unit, a discharging current limiting unit, a charging current limiting unit, a switch K1, a second switch K2, and a management unit; the BOOST unit is preferably, but not limited to, an existing BOOST type DC-DC voltage converter, and preferably, the output voltage of the BOOST unit is the same as the rated voltage of the common input/output terminal, such as 48VDC or 57 VDC. The charging current limiting unit and the discharging current limiting unit are preferably, but not limited to, programmable variable resistors, and when the charging current limiting unit and the discharging current limiting unit are in a programmable variable grouping, the charging current limiting unit and the discharging current limiting unit can be digital potentiometers or programmable resistors, such as digital potentiometers of which the model can be X9241, and at this time, the management unit adjusts the magnitude of the discharging current or the charging current by adjusting the resistance value of the discharging current limiting unit or the charging current unit. The management unit is preferably but not limited to a 51-chip microcomputer.
In this embodiment, as shown in fig. 2, the switch K1 includes one moving contact and three fixed contacts, the power port of the battery is connected with the moving contact of the switch K1, the first fixed contact of the switch K1 is connected with the common input/output end through the discharging current-limiting unit and the voltage-boosting unit in sequence, the second switch K2 is connected in parallel with the voltage-boosting unit, the second fixed contact of the switch K1 is connected with the common input/output end through the charging current unit, and the third fixed contact of the switch K1 is suspended; the information acquisition end of the management unit is connected with the output end of the electric signal sampling unit, the first control end of the management unit is connected with the control end of the change-over switch K1, the second control end of the management unit is connected with the control end of the second switch K2, the third control end of the management unit is connected with the control end of the discharge current-limiting unit, the fourth control end of the management unit is connected with the control end of the charge current-limiting unit, all the management units are connected through a communication interface to form a charge and discharge management network, batteries are charged through the charge and discharge management network in a collaborative charge and discharge mode according to the battery charge and discharge management method, and discharge is performed according to the battery charge and discharge management method. The charging and discharging management network can be connected with other monitoring management modules or an upper computer so as to set a charging and discharging mode.
In this embodiment, as shown in fig. 2, in the charging phase, the selected charging mode is shared through the charging and discharging management network, if the selected charging mode is the common charging mode, each battery charging and discharging management module performs charging management on the corresponding battery according to the set charging parameters, if the selected charging mode is the single charging mode, the batteries are sequentially charged according to the charging priority, each battery charging and discharging management module obtains the charging state of the battery with the previous charging priority through the charging and discharging management network, and after the charging of the battery with the previous charging priority is finished, the battery charging corresponding to the battery charging and discharging management module is started.
In this embodiment, for each battery, when in charging, the management unit connects the movable contact of the switch K1 with the second stationary contact, initially if the battery voltage is in a set safety voltage interval, the management unit adjusts the resistance of the charging current limiting unit to realize charging with a set maximum charging current, and then monitors the charging voltage of the battery in real time, and when the battery charging voltage is not in the set voltage interval, the management unit adjusts the resistance of the charging current limiting unit to make the charging current smaller than the preset maximum charging current, where the preset maximum charging current may be the rated charging current of the battery. When the charging voltage of the battery reaches the charging cut-off voltage or the charging current is the charging cut-off current, the movable contact of the change-over switch K1 is connected with the suspended third fixed contact, and the battery charging is disconnected.
In the present embodiment, as shown in fig. 2, in the discharging stage, the selected discharging mode is shared by the charge and discharge management network, and in the case of the common discharging mode, each discharging branch is output in a constant voltage manner at the beginning, and the discharging current of each branch is adjusted according to the discharging capacity of each branch battery, so that each branch battery is discharged in proportion to the discharging capacity. If the battery is in the priority discharge mode, each battery charge and discharge management module acquires the discharge state of the battery with the previous discharge priority through the charge and discharge management network, and when the discharge of the battery with the high discharge priority is ended; or the maximum discharge capacity of the high-discharge priority battery can not meet the load power demand; or when the high-discharge priority battery fails and cannot support the load power supply requirement, starting the corresponding battery to discharge.
In this embodiment, for each battery, when in discharging, the management unit controls the movable contact of the switch K1 to be connected with the first stationary contact, the voltage output by each discharging branch to the common input/output terminal is the voltage output by the voltage boosting unit, and the voltage is output at a constant voltage, meanwhile, the management unit dynamically sets the resistance value of the discharging current limiting unit according to the discharging capacity of the battery (the discharging capacity is rated in the initial stage, and the actual discharging capacity is the actual discharging capacity after the core capacity), so that the discharging current of each discharging branch battery is the same as the discharging capacity of the battery, as the discharging current of the battery is gradually reduced, when the discharging current of the battery is reduced to the preset discharging current limiting value, the management unit controls the switch K2 to be closed (the initial state of the switch K2 is open), the voltage boosting unit is short-circuited, the battery is discharged in the current limiting mode, at this time, the discharging current of each discharging branch battery is equal to the actual discharging capacity of the battery in proportion, and as the battery is further discharged, when the battery voltage is reduced to a low voltage threshold value, a battery discharging loop is cut off, namely, the management unit controls the movable contact of the change-over switch K1 to be communicated with the suspended third fixed contact.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery charge and discharge management method is characterized by being used for charge and discharge management of a plurality of paths of parallel batteries, and the charging method comprises a common charge mode and a single charge mode;
when the battery is in the common charging mode, the batteries are charged simultaneously according to the set charging parameters;
and when the single charging mode is adopted, the batteries are sequentially charged according to the set charging priority.
2. The battery charging/discharging management method according to claim 1, wherein during the charging process, when the battery charging voltage is within a predetermined voltage range, the battery is charged with a predetermined maximum charging current.
3. A battery charge and discharge management method is characterized by being used for charge and discharge management of multiple parallel batteries, and the discharge method comprises a common discharge mode and a priority discharge mode;
when the battery is in the common discharge mode, the discharge current of each branch circuit is adjusted according to the discharge capacity of each branch circuit battery, so that each branch circuit battery is discharged according to the discharge capacity proportion;
when the power supply is in a priority discharging mode, discharging priorities of different batteries are set, and when the mains supply is powered off, the batteries are sequentially discharged according to the discharging priorities.
4. The battery charge and discharge management method according to claim 3, wherein the common discharge mode includes an automatic mode and a manual mode;
when the system is in an automatic mode, the discharging current of the battery in each branch circuit is adjusted according to the rated discharging capacity of the battery in each branch circuit in the initial stage, so that the battery in each branch circuit is discharged according to the proportion of the rated discharging capacity, the core capacity of all batteries is periodically completed, and the discharging is performed according to the proportion of the actual discharging capacity of the battery after the core capacity of all batteries is completed each time;
and when the battery is in the manual mode, the discharge current of each branch circuit is adjusted according to the rated discharge capacity of the battery in each branch circuit, so that each branch circuit battery is discharged according to the proportion of the rated discharge capacity.
5. The battery charge and discharge management method according to claim 3, wherein in the priority discharge mode, when the high-discharge-priority battery discharge is terminated; or the maximum discharge capacity of the high-discharge priority battery can not meet the load power demand; or when the high-discharge priority battery fails and cannot support the load power supply requirement, the low-discharge priority battery is discharged.
6. The battery charge and discharge management method according to claim 3, wherein the battery is output in a constant voltage manner when the discharge current is less than the current limit value during discharge, and in a current limit manner when the discharge current reaches the current limit value.
7. The battery charge and discharge management method according to claim 6, wherein when the battery is outputting in a current limiting manner, if the battery voltage drops to a low voltage threshold, the battery discharge loop is cut off.
8. A battery charge and discharge management system is characterized by comprising a plurality of batteries and electric signal sampling units which are connected in parallel, wherein the input ends of the electric signal sampling units are respectively connected with power supply ports of all the batteries;
the battery charging and discharging management method comprises the steps that the battery charging and discharging management method comprises the steps of obtaining charging and discharging currents and voltages of all batteries collected by the electric signal sampling unit, conducting charging management according to the battery charging and discharging management method of claim 1 or claim 2, and conducting discharging management according to the battery charging and discharging management method of one of claims 3 to 7.
9. The battery charge and discharge management system of claim 7 further comprising a subrack, the electrical signal sampling unit, the monitoring unit and the battery being disposed within the subrack, the subrack having a connection port connected to the common input and output terminals.
10. The battery charge and discharge management system of claim 7, wherein the monitoring unit includes battery charge and discharge management modules in one-to-one correspondence with the batteries;
the battery charging and discharging management module comprises a boosting unit, a discharging current limiting unit, a charging current limiting unit, a change-over switch, a second switch and a management unit;
the power supply port of the battery is connected with the movable contact of the change-over switch, the first fixed contact of the change-over switch is connected with the public input and output end sequentially through the discharging current-limiting unit and the boosting unit, the second switch is connected with the boosting unit in parallel, the second fixed contact of the change-over switch is connected with the public input and output end through the charging current unit, and the third fixed contact of the change-over switch is suspended;
the information acquisition end of the management unit is connected with the output end of the electric signal sampling unit, the first control end of the management unit is connected with the control end of the change-over switch, the second control end of the management unit is connected with the control end of the second switch, the third control end of the management unit is connected with the control end of the discharge current-limiting unit, the fourth control end of the management unit is connected with the control end of the charge current-limiting unit, all the management units are connected through a communication interface to form a charge-discharge management network, batteries are charged through the charge-discharge management network in a collaborative charging-discharging mode according to the battery charge-discharge management method of claim 1 or claim 2, and the batteries are discharged according to the battery charge-discharge management method of any one of claims 3 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113540585A (en) * | 2021-06-11 | 2021-10-22 | 丽水市金贝聚医疗器械有限公司 | Power supply management method |
| CN113595190A (en) * | 2021-08-03 | 2021-11-02 | 中国铁塔股份有限公司 | Battery combiner and power supply system |
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| CN115172980A (en) * | 2022-06-24 | 2022-10-11 | 深圳市科信通信技术股份有限公司 | Communication base station energy storage device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113540585A (en) * | 2021-06-11 | 2021-10-22 | 丽水市金贝聚医疗器械有限公司 | Power supply management method |
| CN113540585B (en) * | 2021-06-11 | 2024-02-20 | 丽水市金贝聚医疗器械有限公司 | Power supply management method |
| CN113595190A (en) * | 2021-08-03 | 2021-11-02 | 中国铁塔股份有限公司 | Battery combiner and power supply system |
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| WO2023164968A1 (en) * | 2022-03-04 | 2023-09-07 | 福建时代星云科技有限公司 | Multi-branch parallel energy storage system, and charging and discharging method |
| CN115172980A (en) * | 2022-06-24 | 2022-10-11 | 深圳市科信通信技术股份有限公司 | Communication base station energy storage device and control method thereof |
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