CN109638930B - Battery charging control method and power supply system - Google Patents
Battery charging control method and power supply system Download PDFInfo
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- CN109638930B CN109638930B CN201910117276.0A CN201910117276A CN109638930B CN 109638930 B CN109638930 B CN 109638930B CN 201910117276 A CN201910117276 A CN 201910117276A CN 109638930 B CN109638930 B CN 109638930B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000004913 activation Effects 0.000 claims abstract description 47
- 238000004146 energy storage Methods 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000015654 memory Effects 0.000 claims description 22
- 230000007958 sleep Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention is suitable for the technical field of power supply, and provides a battery charging control method and a power supply system, wherein the battery charging control method comprises the following steps: monitoring whether the battery enters a dormant state or not, and sending current state information of the battery to the photovoltaic energy storage inverter when the battery is monitored to enter the dormant state; receiving a battery activation charging request sent by the photovoltaic energy storage inverter; and controlling the battery to enter a charging state according to the battery activation charging request. According to the battery charging control method and the power supply system provided by the embodiment of the invention, after the battery enters the dormant state, the battery is activated by using the battery activation charging request sent by the photovoltaic energy storage inverter, so that the battery is activated and charged through the photovoltaic energy storage inverter. Because the additional charging device is avoided being additionally arranged to activate the battery, the cost input of the battery or the power supply system is favorably reduced.
Description
Technical Field
The invention belongs to the technical field of power supply, and particularly relates to a battery charging control method and a power supply system.
Background
Rechargeable batteries, such as lithium batteries, are often used in conjunction with photovoltaic storage inverters. Under the working mode without photovoltaic or power grid input for a long time, the battery stops outputting due to the fact that energy supplement is unavailable for a long time, and enters a dormant state. When the power grid or photovoltaic power generation outputs electric energy, the inverter cannot charge the battery because the battery does not output the electric energy. The common power supply system generally activates the battery by adding an additional charging device, or manually sets the activation. In the case where there is no external charging device or manual activation is not possible, the battery needs to be returned to the manufacturer for activation.
Disclosure of Invention
In view of this, embodiments of the present invention provide a battery charging control method and a power supply system, so as to solve the problem of inconvenient battery activation and charging in the prior art.
According to a first aspect, an embodiment of the present invention provides a battery charging control method, including: monitoring whether the battery enters a dormant state or not, and sending current state information of the battery to a photovoltaic energy storage inverter when the battery is monitored to enter the dormant state; receiving a battery activation charging request sent by the photovoltaic energy storage inverter; and controlling the battery to enter a charging state according to the battery activation charging request.
According to the battery charging control method provided by the embodiment of the invention, after the battery enters the dormant state, the battery is activated by using the battery activation charging request sent by the photovoltaic energy storage inverter, so that the battery is activated and charged through the photovoltaic energy storage inverter. Because the additional charging device is avoided being additionally arranged to activate the battery, the cost input of the battery or the power supply system is favorably reduced. In addition, the battery charging control method provided by the embodiment of the invention avoids manual activation processing on the battery manually, and reduces the maintenance frequency of the battery.
According to a first aspect, in a first implementation of the first aspect, the battery activation charging request comprises: a voltage signal of a predetermined amplitude or a voltage pulse signal of a predetermined duty ratio.
According to the battery charging control method provided by the embodiment of the invention, the battery is prompted to be charged through the voltage signal with the preset amplitude or the voltage pulse signal with the preset duty ratio output by the photovoltaic energy storage inverter. When a voltage signal is selected as a BATTERY activation charging request, the voltage signal has a predetermined amplitude, so that the voltage signal can be distinguished from control signals of other voltage types, and a BATTERY Management System (BMS) BATTERY management system (BATTERY MANAGEMENT SYSTEM, BMS for short) can control a BATTERY to be charged according to the voltage signal. When the pulse signal is selected as the battery activation charging request, the pulse signal has a preset duty ratio, so that the pulse signal can be distinguished from other pulse control signals, and the BMS can control the battery to be charged according to the pulse signal.
According to a first aspect, in a second implementation form of the first aspect, the controlling the battery into a charging state according to the battery activation charging request comprises: judging whether the battery activation charging request is received or not; and when the battery activation charging request is received, controlling the on-off device in the battery to pull in.
According to the battery charging control method provided by the embodiment of the invention, after the battery activation charging request is received, the breaker in the battery is controlled to pull in, so that the battery is charged.
According to the first aspect, in a third implementation manner of the first aspect, the monitoring whether the battery enters the sleep state includes: acquiring power supply information of the battery, and judging whether the battery is connected to a power supply or not according to the power supply information; when the battery is not connected with a power supply, state information of a breaker in the battery is obtained, and whether the battery is in a dormant state or not is judged according to the state information of the breaker.
According to the battery charging control method provided by the embodiment of the invention, on the premise that the battery is not connected with a power supply, whether the battery is in a dormant state is determined through the state information of the breaker in the battery, so that whether the battery is in the dormant state can be conveniently, quickly and accurately judged.
According to a third implementation manner of the first aspect, in the fourth implementation manner of the first aspect, the determining whether the battery is in a sleep state according to the state information of the interrupter includes: and when the interrupter is cut off, determining that the battery is in a dormant state.
According to the battery charging control method provided by the embodiment of the invention, when the battery is not connected with a power supply and the breaker in the battery is cut off, the battery is directly judged to be in a dormant state. Under the condition that the battery does not supplement electric energy for a long time and continuously consumes power, the battery can enter a dormant state to protect the battery, and thereby the battery is prevented from being accessed into electric equipment to cause transient discharge. The battery charging control method provided by the embodiment of the invention utilizes the principle of battery dormancy and realizes the quick judgment of the dormant state of the battery through the state information of the power supply and the breaker.
According to a third embodiment of the first aspect, in the fifth embodiment of the first aspect, the determining whether the battery is in a sleep state according to the state information of the interrupter further includes: when the interrupter is turned on, it is determined that the battery is not in a sleep state.
According to the battery charging control method provided by the embodiment of the invention, when the breaker in the battery is switched on, the battery is directly judged not to be in the dormant state. The breaker in the battery is attracted when the battery is charged or discharged, so that an external power supply charges the battery or the battery supplies power to external electric equipment. Therefore, when the interrupter is in the pull-in state, the battery can be directly judged to be in the normal working state instead of the dormant state.
According to the first aspect or any implementation manner of the first aspect, in a sixth implementation manner of the first aspect, after the step of controlling the battery to enter the charging state according to the battery activation charging request, the battery charging control method further includes: and controlling the battery to be charged by using the constant-voltage constant-current output by the photovoltaic energy storage inverter.
According to the battery charging control method provided by the embodiment of the invention, after the battery is activated according to the battery activation charging request, the battery is further controlled to be charged by using the constant-voltage constant-current source output by the photovoltaic energy storage inverter, so that the dormant battery due to electric energy consumption can be fully charged again, and the power supply endurance of the battery or a power supply system is ensured.
According to a second aspect, an embodiment of the present invention provides a battery charge control apparatus, including: the battery state detection unit is used for monitoring whether the battery enters a dormant state or not, and sending the current state information of the battery to the photovoltaic energy storage inverter when the battery is monitored to enter the dormant state; and the charging control unit is used for receiving a battery activation charging request sent by the photovoltaic energy storage inverter and controlling the battery to enter a charging state according to the battery activation charging request.
According to a third aspect, an embodiment of the present invention provides a power supply system, including: the system comprises a lithium battery, a memory, a processor and a photovoltaic energy storage inverter; the lithium battery, the memory, the processor and the photovoltaic energy storage inverter are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the battery charging control method according to the first aspect or any embodiment of the first aspect.
According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the battery charging control method according to the first aspect or any implementation manner of the first aspect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention;
fig. 2 is a flowchart of a specific example of a battery charging control method according to an embodiment of the present invention;
fig. 3 is a flowchart of another specific example of a battery charging control method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a specific example of a battery charge control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a specific example of the power supply system according to the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic view of an application scenario of an embodiment of the present invention. In fig. 1, a BMS101 in a battery 100 implements charge and discharge management of a battery body 103 by controlling cut-off and pull-in of a interrupter 102. When the battery 100 does not obtain the external power transmitted by the photovoltaic energy storage inverter 200 for a long time, the battery 100 will cut off the interrupter 102 therein due to the self-power consumption of the battery 100, so that the battery 100 enters the sleep state. For the ordinary battery 100, when it is in the sleep state, even if the pv storage inverter 200 receives the electric energy transmitted by the grid or the pv panel, the battery body 103 cannot be charged due to the cut-off of the interrupter 102.
In some embodiments, as shown in fig. 2, the BMS101 may effect the active charging of the hibernating battery 100 by performing the following steps:
step S101: monitoring whether the battery enters a dormant state or not, and sending current state information of the battery to the photovoltaic energy storage inverter when the battery enters the dormant state.
In one embodiment, as shown in fig. 3, the step of monitoring whether the battery enters the sleep state may include the following sub-steps:
step S1011: and acquiring power supply information of the battery, and judging whether the battery is connected with a power supply according to the power supply information. When the battery is not connected to the power source, step S1012 is executed; when the battery is connected to the power source, no operation is performed.
Step S1012: and acquiring the state information of the breaker in the battery, and judging whether the battery is in a dormant state according to the state information of the breaker.
Specifically, when the interrupter is turned off, it may be determined that the battery is in a sleep state; when the interrupter is turned on, it may be determined that the battery is not in a sleep state. On the premise that the battery is not connected with a power supply, whether the battery is in a dormant state or not is determined through the state information of the breaker in the battery, and whether the battery is dormant or not can be conveniently, quickly and accurately judged. The breaker in the battery is attracted when the battery is charged or discharged, so that an external power supply charges the battery or the battery supplies power to external electric equipment. Therefore, when the interrupter is in the pull-in state, the battery can be directly judged to be in the normal working state instead of the dormant state.
Optionally, as shown in fig. 3, in order to fully implement all functions of step S101, the following steps may be added after step S1012:
step S1013: and when the situation that the battery enters the dormant state is monitored, sending the current state information of the battery to the photovoltaic energy storage inverter.
Among them, the pv storage inverter 200 should reactivate the battery 100 through the BMS101 before charging the battery 100 after knowing that the battery 100 is in the sleep state. For this reason, after the pv energy storage inverter 200 obtains the external power again, for example, when the external power grid or the pv panel outputs the power again, the pv energy storage inverter 200 may send a battery activation charging request to the BMS101 while transmitting the external power to the battery 100, so as to activate the battery 100, and thus realize recharging of the dormant battery 100.
Step S102: and receiving a battery activation charging request sent by the photovoltaic energy storage inverter.
In one embodiment, a voltage signal with a predetermined amplitude or a voltage pulse signal with a predetermined duty ratio may be selected as the battery activation charging request. When a voltage signal is selected as a battery activation charging request, the voltage signal has a predetermined amplitude, so that the voltage signal can be distinguished from control signals of other voltage types, and the BMS101 can control the battery to be charged according to the voltage signal. When the pulse signal is selected as the battery activation charging request, the pulse signal has a predetermined duty ratio, so that the pulse signal can be distinguished from other pulse control signals, and the BMS101 can control the battery to be charged according to the pulse signal.
Step S103: and controlling the battery to enter a charging state according to the battery activation charging request.
In one embodiment, as shown in fig. 3, the step S103 of controlling the battery to enter the charging state according to the battery activation charging request may be implemented by the following sub-steps:
step S1031: it is determined whether a battery activation charging request is received. When receiving the battery activation charging request, performing step S1032; when no battery activation charging request is received, no operation is performed.
Step S1032: and controlling the on-off of the breaker in the battery.
In this step, the interrupter 102 is closed, so that the external power output by the photovoltaic energy storage inverter 200 can flow into the battery 100, thereby charging the battery 100.
Optionally, as shown in fig. 3, in a specific embodiment, the following steps may be added after step S103:
step S104: and the control battery is charged by using the constant voltage and constant current output by the photovoltaic energy storage inverter.
In this step, after the battery is activated according to the battery activation charging request, the battery 100 is further controlled to be charged by using the constant voltage and constant current source output by the photovoltaic energy storage inverter 200, so that the battery 100 which is originally dormant due to power consumption can be fully charged again, and the power supply endurance of the battery 100 or the power supply system is ensured.
According to the battery charging control method provided by the embodiment of the invention, after the battery enters the dormant state, the battery is activated by using the battery activation charging request sent by the photovoltaic energy storage inverter, so that the battery is activated and charged through the photovoltaic energy storage inverter. Because the additional charging device is avoided being additionally arranged to activate the battery, the cost input of the battery or the power supply system is favorably reduced. In addition, the battery charging control method provided by the embodiment of the invention avoids manual activation processing on the battery manually, and reduces the maintenance frequency of the battery.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
An embodiment of the present invention further provides a battery charging control apparatus, as shown in fig. 4, the battery charging control apparatus may include: a battery state detection unit 401 and a charge control unit 402.
The battery state detection unit 401 is configured to monitor whether the battery enters a sleep state, and send current state information of the battery to the photovoltaic energy storage inverter when it is monitored that the battery enters the sleep state; the specific working process can be described with reference to step S101 in the above method embodiment.
The charging control unit 402 is configured to receive a battery activation charging request sent by the photovoltaic energy storage inverter, and is configured to control the battery to enter a charging state according to the battery activation charging request; the specific working process can be described with reference to step S102 to step S103 in the above method embodiment.
Optionally, in a specific embodiment, the charging control unit 402 may be further configured to control the battery to be charged by using a constant-voltage constant-current output by the photovoltaic energy storage inverter until the battery enters a saturation state; the specific working process may refer to step S104 in the above method embodiment.
An embodiment of the present invention further provides a power supply system, as shown in fig. 5, the power supply system may include a processor 501, a memory 502, a battery 100, and a photovoltaic energy storage inverter 200. Wherein, processor 501, memory 502, battery 100 and photovoltaic energy storage inverter 200 are connected in communication. Specifically, the processor 501 and the memory 502 may be connected by a bus or other means, and fig. 5 illustrates the connection by the bus as an example. The processor 501 and the memory 502 may constitute the BMS101 of the battery 100 to manage and control the charge and discharge process of the battery 100, thereby protecting the battery 100 from overcharge and overdischarge of the battery 100.
The memory 502, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the battery charging control method in the embodiment of the present invention (e.g., the battery state detection unit 401 and the charging control unit 402 shown in fig. 4). The processor 501 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 502, that is, implements the battery charging control method in the above method embodiment.
The memory 502 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 501, and the like. Further, the memory 502 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 502 optionally includes memory located remotely from processor 501, which may be connected to processor 501 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 502 and, when executed by the processor 501, perform the battery charging control method in the embodiment shown in fig. 2 to 3.
The specific details of the terminal device may be understood by referring to the corresponding related descriptions and effects in the embodiments shown in fig. 2 to fig. 3, which are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A battery charge control method, comprising:
monitoring whether the battery enters a dormant state or not, and sending current state information of the battery to a photovoltaic energy storage inverter when the battery is monitored to enter the dormant state;
receiving a battery activation charging request sent by the photovoltaic energy storage inverter; wherein the battery activation charging request comprises: a voltage signal with a predetermined amplitude or a voltage pulse signal with a predetermined duty ratio;
controlling the battery to enter a charging state according to the battery activation charging request;
the monitoring whether the battery enters the sleep state comprises the following steps:
acquiring power supply information of the battery, and judging whether the battery is connected to a power supply or not according to the power supply information;
when the battery is not connected with a power supply, state information of a breaker in the battery is obtained, and whether the battery is in a dormant state or not is judged according to the state information of the breaker.
2. The battery charge control method of claim 1, wherein said controlling the battery into a charged state in accordance with the battery activation charge request comprises:
judging whether the battery activation charging request is received or not;
and when the battery activation charging request is received, controlling the on-off device in the battery to pull in.
3. The battery charge control method according to claim 1, wherein the determining whether the battery is in a sleep state according to the state information of the interrupter includes:
and when the interrupter is cut off, determining that the battery is in a dormant state.
4. The battery charge control method according to claim 1, wherein the determining whether the battery is in a sleep state according to the state information of the interrupter, further comprises:
when the interrupter is turned on, it is determined that the battery is in an un-sleep state.
5. The battery charge control method according to any one of claims 1 to 4, wherein after the step of controlling the battery to enter a charged state according to the battery activation charge request, the battery charge control method further comprises:
and controlling the battery to be charged by using the constant-voltage constant-current output by the photovoltaic energy storage inverter.
6. A battery charge control device, comprising:
the battery state detection unit is used for monitoring whether the battery enters a dormant state or not, and sending the current state information of the battery to the photovoltaic energy storage inverter when the battery is monitored to enter the dormant state;
the charging control unit is used for receiving a battery activation charging request sent by the photovoltaic energy storage inverter and controlling the battery to enter a charging state according to the battery activation charging request; wherein the battery activation charging request comprises: a voltage signal with a predetermined amplitude or a voltage pulse signal with a predetermined duty ratio;
the battery state detection unit is specifically configured to:
acquiring power supply information of the battery, and judging whether the battery is connected to a power supply or not according to the power supply information;
when the battery is not connected with a power supply, state information of a breaker in the battery is obtained, and whether the battery is in a dormant state or not is judged according to the state information of the breaker.
7. A power supply system, comprising:
the system comprises a lithium battery, a memory, a processor and a photovoltaic energy storage inverter;
the lithium battery, the memory, the processor and the photovoltaic energy storage inverter are in communication connection with each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the battery charging control method according to any one of claims 1 to 5.
8. A computer-readable storage medium storing computer instructions for causing a computer to execute the battery charge control method according to any one of claims 1 to 5.
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| CN102593540A (en) * | 2012-02-17 | 2012-07-18 | 中兴通讯股份有限公司 | Battery activating method, battery activating module and terminal |
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