CN111509795B - Household energy storage method and system with charging and discharging current reduction strategy - Google Patents
Household energy storage method and system with charging and discharging current reduction strategy Download PDFInfo
- Publication number
- CN111509795B CN111509795B CN202010275387.7A CN202010275387A CN111509795B CN 111509795 B CN111509795 B CN 111509795B CN 202010275387 A CN202010275387 A CN 202010275387A CN 111509795 B CN111509795 B CN 111509795B
- Authority
- CN
- China
- Prior art keywords
- value
- current limiting
- battery module
- charging
- module
- 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.)
- Active
Links
Images
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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
-
- 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
- H01M10/443—Methods for charging or discharging in response to temperature
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a household energy storage method and a system with a charging and discharging current reduction strategy, wherein the household energy storage method comprises the following steps: the method comprises a charging judgment step, a charging current limiting step, a discharging current limiting step and a data processing step. The invention has the beneficial effects that: according to the invention, through the current reduction strategy, the charge and discharge strategy of the system is changed into a flexible charge and discharge control strategy, the charge and discharge safety coefficient of the system is enhanced, the full load or overload operation probability of the battery system is reduced, and the service life of the battery is prolonged.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a household energy storage method and system with a charging and discharging current reduction strategy.
Background
At present, a whole set of household energy storage system (an inverter and a battery system) is provided with a mode with or without communication between the inverter and the battery, only a positive electrode and a negative electrode need to be connected without communication, and the battery system is used for opening and closing system output through an MOS (metal oxide semiconductor) tube according to the condition detected in real time; the communication mode with communication is RS485 or CAN communication, the communication is that the anode and the cathode are connected, and a communication line is connected, the interiors of the two systems both follow the agreed communication protocol to carry out data transmission, and the interior of the battery system also controls the MOS tube to open and close the system output according to the detected real-time data; however, in both of these two modes, after the inverter is connected, when the load power is greater than the maximum power output capability of the inverter, the inverter outputs according to the maximum capability, then the power supply of the inverter is provided by the commercial power and the household energy storage system, when the commercial power is absent, all household energy storage outputs exist, until all the electric quantity of the household energy storage system is discharged, then the inverter still outputs and inputs according to the default power or the maximum power when the discharging end or the charging end is reached, or a certain module in the battery system fails, and this mode is not intelligent enough, and also has a certain potential safety hazard.
The battery part in the household energy storage system may be a single battery pack or a plurality of battery packs connected in parallel, so that the requirement for capacity is increased, and the time for realizing discharge delay by the module can be prolonged. Each battery module is internally provided with a protection plate, and the battery can be specially protected to be used safely and stably. When one module in the battery system fails, because other parallel modules can still work normally, the whole set of batteries can still be used normally, so that the system can ignore the battery block which has failed, and the system still can input and output according to the maximum power. At this time, the remaining battery modules may be in full-load operation or overload operation, which may affect the service life of the battery and also have certain potential safety hazard.
In conclusion, when the battery module works in an overload state, the service life of the battery is seriously influenced, and potential safety hazards exist.
Disclosure of Invention
The invention provides a household energy storage method with a charging and discharging current reduction strategy, which comprises the following steps:
a charging judgment step: judging whether the battery system is charged, if so, executing a charging current limiting step, otherwise, executing a discharging current limiting step;
charging and current limiting: when the charging current value of a single battery module is detected to be larger than a first set current value, the charging current limit value of the battery module is modified to a first designated value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value; after the charging current limiting step is executed, a data processing step is executed;
discharging and limiting current: when the discharging current value of the single battery module is detected to be larger than the set current value, the discharging current limit value of the battery module is modified into a second specification; recovery conditions are as follows: when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value; after the discharging current limiting step is executed, executing a data processing step;
a data processing step: the battery system uploads the total charging current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total charging current limiting value received in real time; the battery system uploads the total discharge current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total discharge current limiting value received in real time.
As a further improvement of the present invention, in the charging current limiting step, when it is detected that the voltage value of a single battery module reaches a first set voltage value, the charging current limiting value of the battery module is modified to a first specified value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting step, when the voltage value of a single battery module is detected to be smaller than a second set voltage value, the discharging current limiting value of the battery module is modified to a second set value; and (3) recovering conditions: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value.
As a further improvement of the present invention, in the charging current limiting step, when it is detected that the temperature of a single battery module reaches a first set temperature value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the charging current limiting step, when the SOC of a single battery module is detected to reach a first proportional value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting step, when the temperature of a single battery module is detected to reach a second set temperature, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: when the working state of the battery module is converted into non-discharge state, the discharge current-limiting value is recovered to a second set current value from a second specified value;
in the discharging current limiting step, when the SOC of a single battery module is detected to reach a second proportional value, the discharging current limiting value of the battery module is modified to a second specified value; and (3) recovering conditions: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
As a further improvement of the present invention, the first set current value is 25A, the first specified value is 5A, the first set voltage value is 3.65V, the first set temperature value is 55 degrees celsius, and the first proportional value is 95%; the set current value is 50A, the second specified value is 15A, the second set current value is 25A, the second set voltage value is 2.5V, the second set temperature value is 55 degrees centigrade, and the second proportional value is 10%.
As a further improvement of the present invention, the home energy storage method further comprises a polling step and a checking step which are sequentially executed,
and (3) polling: the inverter issues a polling command;
and (3) a verification step: and (4) checking whether the data of the battery system is complete, if so, executing a charging judgment step, and if not, ending.
The invention also discloses a household energy storage system with the charging and discharging current-reducing strategy, which comprises a battery system and an inverter, wherein the battery system and the inverter can communicate with each other, the battery system comprises a plurality of parallel battery modules, and the household energy storage system further comprises:
a charging judgment module: the charging current limiting module is used for judging whether the battery system is charged or not, if so, the charging current limiting module is operated, and otherwise, the discharging current limiting module is operated;
a charging current limiting module: when the charging current value of a single battery module is detected to be larger than a first set current value, the charging current limit value of the battery module is modified to a first designated value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value; after the charging current limiting module is operated, the data processing module is operated;
a discharging current limiting module: when the discharging current value of the single battery module is detected to be larger than the set current value, the discharging current limiting value of the battery module is modified into a second specification; and (3) recovering conditions: when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value; after the discharging current limiting module is operated, the data processing module is executed;
a data processing module: the battery system uploads the total charging current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total charging current limiting value received in real time; the battery system uploads the total discharge current limiting value to the inverter at set time intervals, and the inverter changes input power and output power according to the total discharge current limiting value received in real time.
As a further improvement of the present invention, in the charging current limiting module, when it is detected that the voltage value of a single battery module reaches a first set voltage value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting module, when the voltage value of a single battery module is detected to be smaller than a second set voltage value, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
As a further improvement of the present invention, in the charging current limiting module, when it is detected that the temperature of a single battery module reaches a first set temperature value, the charging current limiting value of the battery module is modified to a first specified value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the charging current limiting module, when the SOC of a single battery module is detected to reach a first proportional value, the charging current limiting value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting module, when the temperature of a single battery module is detected to reach a second set temperature, the discharging current limiting value of the battery module is modified into a second specified value; recovery conditions are as follows: when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value;
in the discharging current limiting module, when the SOC of a single battery module is detected to reach a second proportional value, the discharging current limiting value of the battery module is modified to a second specified value; and (3) recovering conditions: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value.
As a further improvement of the present invention, the first set current value is 25A, the first specified value is 5A, the first set voltage value is 3.65V, the first set temperature value is 55 degrees celsius, and the first proportional value is 95%; the set current value is 50A, the second specified value is 15A, the second set current value is 25A, the second set voltage value is 2.5V, the second set temperature value is 55 degrees centigrade, and the second proportional value is 10%.
As a further improvement of the invention, the home energy storage system further comprises a polling module and a checking module which are sequentially executed,
a polling module: the inverter issues a polling command;
a checking module: and (4) checking whether the data of the battery system is complete, if so, operating the charging judgment module, and if not, ending.
The invention has the beneficial effects that: according to the invention, through the current reduction strategy, the charge and discharge strategy of the system is changed into a flexible charge and discharge control strategy, the charge and discharge safety coefficient of the system is enhanced, the full load or overload operation probability of the battery system is reduced, and the service life of the battery is prolonged.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, the invention discloses a household energy storage method with a charge-discharge current-reducing strategy, which comprises the following steps:
polling: the inverter issues a polling command;
and (3) a verification step: and (4) checking whether the data of the battery system is complete, if so, executing a charging judgment step, and if not, ending.
A charging judgment step: and judging whether the battery system is charged, if so, executing a charging current limiting step, and otherwise, executing a discharging current limiting step.
The charging current limiting step comprises the following four parts:
(1) Current: when the current value of a single battery module is detected to be greater than a first set current value 25A, the charging current limit value of the battery module is modified to a first specified value 5A; for example: the battery system finds that the charging current of one battery module is larger than 50A, the charging current limit of the battery module is changed to 5A, and the changed total charging current limit value is 25+ 2+5=55A;
and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current limiting value is recovered to a first set current value 25A from a first designated value 5A.
(2) Voltage: when the voltage value of a single battery module is detected to reach a first set voltage value of 3.65V, the charging current limiting value of the battery module is modified to be a first specified value of 5A; for example: and combining 3 battery modules, wherein the total charging current limit is 3 × 25=75A at the beginning, when one of the battery modules finds that the highest cell voltage is greater than 3.65V, the charging current limit of the battery module is changed to 5A, the changed total charging current limit value is 25 × 2+5=55A, and if both the battery modules are greater than 3.65V, the total charging current limit value is 25+ 5=35A.
And (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current limiting value is recovered to a first set current value 25A from a first designated value 5A.
(3) Temperature: when the temperature of a single battery module is detected to reach 55 degrees of a first set temperature value, the charging current limiting value of the battery module is modified to be a first designated value 5A; for example: and combining 3 battery modules, wherein the total charging current limit is 3 × 25=75A at the beginning, when one of the battery modules finds that the highest temperature is greater than 55 ℃, the charging current limit of the battery module is changed to 5A, the changed total charging current limit value is 25 × 2+5=55A, and if the temperatures of two battery modules are greater than 55 ℃, the total charging current limit value is 25+ 5=35A.
And (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current limiting value is recovered to a first set current value 25A from a first designated value 5A.
(4) SOC: when the SOC of a single battery module is detected to reach a first proportional value of 95%, the charging current limiting value of the battery module is modified to a first designated value of 5A; for example: and combining 3 battery modules, wherein the total charging current limit is 3 × 25=75A at the beginning, when one of the battery modules finds that the SOC is greater than 95%, changing the charging current limit of the battery module to 5A, and the changed total charging current limit value is 25 × 2+5=55A, and if both the two battery modules are greater than 95%, the total charging current limit value is 25+ 5=35A.
And (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current limiting value is recovered to a first set current value 25A from a first designated value 5A.
A data processing step: the battery system uploads the total charging current limiting value to the inverter every set time (1 second), and the inverter changes input power and output power according to the total charging current limiting value received in real time.
The discharging current limiting step comprises the following four parts:
(1) Current: when the discharging current value of a single battery module is detected to be larger than the set current value 50A, the discharging current limiting value of the battery module is modified to be a second designated value 15A; for example: the battery system finds that the discharge current of one battery module is greater than 50A, the discharge current limit of the battery module is changed to 15A, and the changed total discharge current limit value is 25+ 2+15=65A;
and (3) recovering conditions: and when the working state of the battery module is changed into non-discharge state, the discharge current limiting value is recovered to a second set current value 25A from a second set value 15A.
(2) Voltage: when the voltage value of a single battery module is detected to be smaller than a second set voltage value of 2.5V, the discharging current limiting value of the battery module is modified into a second specified value of 15A; for example: and combining 3 battery modules, limiting the current of each battery module by 25A, initially setting the total discharge current limit to 3 × 25=75A, when the battery system finds that the voltage of one battery module is smaller than 2.5V, changing the discharge current limit of the battery module to 15A, wherein the changed total discharge current limit value is 25 × 2+15=65A, and if both battery modules are smaller than 2.5V, the total discharge current limit value is 25+15 =55A.
Recovery conditions are as follows: and when the working state of the battery module is changed into non-discharge state, the discharge current limiting value is recovered to a second set current value 25A from a second set value 15A.
(3) Temperature: when the temperature of a single battery module is detected to reach a second set temperature of 55 ℃, modifying the discharge current limiting value of the battery module into a second specified value of 15A; for example: and 3 battery modules are combined, each battery module is subjected to current limiting of 25A, the total current limiting for discharging is 3 × 25=75A at the beginning, when the battery system finds that the temperature of one battery module reaches 55 ℃, the current limiting for discharging of the battery module is changed to 15A, the changed total current limiting value for discharging is 25 × 2+15=65A, and if the temperatures of two battery modules reach 55 ℃, the total current limiting value for discharging is 25+15 =55A.
And (3) recovering conditions: and when the working state of the battery module is changed into non-discharge state, the discharge current limiting value is recovered to a second set current value 25A from a second set value 15A.
(4) SOC: when the SOC of a single battery module is detected to reach a second proportional value of 10%, the discharging current limiting value of the battery module is modified to a second specified value of 15A; for example: and combining 3 battery modules, wherein each battery module limits current by 25A, the total discharge current limit is 3 × 25=75A at the beginning, when the battery system finds that one battery module SOC is less than 10%, the discharge current limit of the battery module is changed to 15A, the changed total discharge current limit value is 25 × 2+15=65A, and if the SOC of the two battery modules is less than 10%, the total discharge current limit value is 25+15 =55A.
And (3) recovering conditions: when the battery module is in a non-discharge state, the discharge current limiting value is restored from the second designated value 15A to the second set current value 25A.
A data processing step: the battery system uploads the total discharge current limiting value to the inverter every set time (1 second), and the inverter changes input and output power according to the total discharge current limiting value received in real time.
The invention also discloses a household energy storage system with the charging and discharging current-reducing strategy, which comprises a battery system and an inverter, wherein the battery system and the inverter can communicate with each other, the battery system comprises a plurality of parallel battery modules, and the household energy storage system further comprises:
a charging judgment module: the charging current limiting module is used for judging whether the battery system is charged, if so, the charging current limiting module is operated, and otherwise, the discharging current limiting module is operated;
a charging current limiting module: when the charging current value of a single battery module is detected to be larger than a first set current value, the charging current limit value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value; after the charging current limiting module is operated, operating the data processing module;
a discharging current limiting module: when the discharging current value of the single battery module is detected to be larger than the set current value, the discharging current limiting value of the battery module is modified into a second specification; and (3) recovering conditions: when the working state of the battery module is converted into non-discharge state, the discharge current-limiting value is recovered to a second set current value from a second specified value; after the discharging current limiting module is operated, the data processing module is executed;
a data processing module: the battery system uploads the total charging current limiting value to the inverter every set time, and the inverter changes input and output power according to the total charging current limiting value received in real time; the battery system uploads the total discharge current limiting value to the inverter at set time intervals, and the inverter changes input power and output power according to the total discharge current limiting value received in real time.
In the charging current limiting module, when the voltage value of a single battery module is detected to reach a first set voltage value, the charging current limiting value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting module, when the voltage value of a single battery module is detected to be smaller than a second set voltage value, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value.
In the charging current limiting module, when the temperature of a single battery module is detected to reach a first set temperature value, the charging current limiting value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the charging current limiting module, when the SOC of a single battery module is detected to reach a first proportional value, the charging current limiting value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current-limiting value is restored to a first set current value from a first specified value;
in the discharging current limiting module, when the temperature of a single battery module is detected to reach a second set temperature, the discharging current limiting value of the battery module is modified into a second specified value; and (3) recovering conditions: when the working state of the battery module is converted into non-discharge state, the discharge current-limiting value is recovered to a second set current value from a second specified value;
in the discharging current limiting module, when the SOC of a single battery module is detected to reach a second proportional value, the discharging current limiting value of the battery module is modified to a second specified value; and (3) recovering conditions: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
The first set current value is 25A, the first specified value is 5A, the first set voltage value is 3.65V, the first set temperature value is 55 ℃, and the first proportional value is 95%; the set current value is 50A, the second specified value is 15A, the second set current value is 25A, the second set voltage value is 2.5V, the second set temperature value is 55 degrees centigrade, and the second proportional value is 10%.
The household energy storage system also comprises a polling module and a checking module which are sequentially executed,
a polling module: the inverter issues a polling command;
a checking module: and (4) checking whether the data of the battery system is complete, if so, operating the charging judgment module, and if not, ending.
In the invention, the battery system and the inverter have a communication protocol, the charging current limiting value and the discharging current limiting value are increased, if the original protocol exists, the charging current limiting value and the discharging current limiting value are not increased, and if the original protocol does not exist, the charging current limiting value and the discharging current limiting value are increased in the protocol. The charging current limiting value and the discharging current limiting value are judged by the battery system according to real-time operation parameters of all modules in the system, so that the charging current limiting value and the discharging current limiting value are changed, the inverter can change the input current or the discharging current of the inverter according to the two values, the purpose of current reduction is achieved, the voltage is unchanged, the current is reduced, and the purpose of power utilization is achieved. The battery system can achieve the purpose of reducing the charging current limiting value and the discharging current limiting value according to the current, the voltage of the single battery module, the temperature of the single battery module and the SOC (percentage of electric quantity).
According to the invention, through the current reduction strategy, the charge and discharge strategy of the system is changed into a flexible charge and discharge control strategy, the charge and discharge safety coefficient of the system is enhanced, the full load or overload operation probability of the battery system is reduced, and the service life of the battery is prolonged.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A household energy storage method with a charging and discharging current reduction strategy is characterized by comprising the following steps:
a charging judgment step: judging whether the battery system is charged, if so, executing a charging current limiting step, otherwise, executing a discharging current limiting step;
charging and current limiting: when the charging current value of a single battery module is detected to be larger than a first set current value, the charging current limit value of the battery module is modified into a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value; after the charging current limiting step is executed, executing a data processing step;
discharging and limiting current: when the discharging current value of the single battery module is detected to be larger than the set current value, the discharging current limit value of the battery module is modified into a second specification; and (3) recovering conditions: when the working state of the battery module is converted into non-discharge state, the discharge current-limiting value is recovered to a second set current value from a second specified value; after the discharging current limiting step is executed, executing a data processing step;
and (3) data processing: the battery system uploads the total charging current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total charging current limiting value received in real time; the battery system uploads the total discharge current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total discharge current limiting value received in real time.
2. The home energy storage method according to claim 1, wherein in the charging current limiting step, when it is detected that the voltage value of an individual battery module reaches a first set voltage value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current-limiting value is restored to a first set current value from a first specified value;
in the discharging current limiting step, when the voltage value of a single battery module is detected to be smaller than a second set voltage value, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
3. The home energy storage method according to claim 2, wherein in the charging current limiting step, when it is detected that the temperature of a single battery module reaches a first set temperature value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current-limiting value is restored to a first set current value from a first specified value;
in the charging current limiting step, when the SOC of a single battery module is detected to reach a first proportional value, the charging current limiting value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current-limiting value is restored to a first set current value from a first specified value;
in the discharging current limiting step, when the temperature of a single battery module is detected to reach a second set temperature value, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value;
in the discharging current limiting step, when the SOC of a single battery module is detected to reach a second proportional value, the discharging current limiting value of the battery module is modified to a second specified value; recovery conditions are as follows: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value.
4. The home energy storage method according to claim 3, wherein the first set current value is 25A, the first specified value is 5A, the first set voltage value is 3.65V, the first set temperature value is 55 degrees Celsius, and the first proportional value is 95%; the set current value is 50A, the second designated value is 15A, the second set current value is 25A, the second set voltage value is 2.5V, the second set temperature value is 55 ℃, and the second proportional value is 10%.
5. The home energy storage method according to any one of claims 1 to 4, further comprising performing a polling step, a verifying step in order,
polling: the inverter issues a polling command;
and (3) a verification step: and (4) checking whether the data of the battery system is complete, if so, executing a charging judgment step, and if not, ending.
6. The utility model provides a take energy storage system of family of charge-discharge strategy that falls, its characterized in that includes battery system and inverter, battery system and inverter can communicate, battery system includes a plurality of parallelly connected battery module, and this energy storage system of family still includes:
a charging judgment module: the charging current limiting module is used for judging whether the battery system is charged, if so, the charging current limiting module is operated, and otherwise, the discharging current limiting module is operated;
a charging current limiting module: when the charging current value of a single battery module is detected to be larger than a first set current value, the charging current limit value of the battery module is modified to a first designated value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value; after the charging current limiting module is operated, the data processing module is operated;
a discharging current limiting module: when the discharging current value of the single battery module is detected to be larger than the set current value, the discharging current limiting value of the battery module is modified into a second specification; and (3) recovering conditions: when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second designated value; after the discharging current limiting module is operated, the data processing module is executed;
a data processing module: the battery system uploads the total charging current limiting value to the inverter at set time intervals, and the inverter changes input and output power according to the total charging current limiting value received in real time; the battery system uploads the total discharge current limiting value to the inverter at set time intervals, and the inverter changes input power and output power according to the total discharge current limiting value received in real time.
7. The home energy storage system according to claim 6, wherein in the charging current limiting module, when it is detected that the voltage value of an individual battery module reaches a first set voltage value, the charging current limiting value of the battery module is modified to a first specified value; and (3) recovering conditions: when the working state of the battery module is changed into non-charging, the charging current-limiting value is restored to a first set current value from a first specified value;
in the discharging current limiting module, when the voltage value of a single battery module is detected to be smaller than a second set voltage value, the discharging current limiting value of the battery module is modified to a second set value; and (3) recovering conditions: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
8. The home energy storage system according to claim 7, wherein in the charging current limiting module, when it is detected that the temperature of a single battery module reaches a first set temperature value, the charging current limiting value of the battery module is modified to a first specified value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the charging current limiting module, when the SOC of a single battery module is detected to reach a first proportional value, the charging current limiting value of the battery module is modified to a first designated value; recovery conditions are as follows: when the working state of the battery module is changed into non-charging state, the charging current limiting value is recovered to a first set current value from a first designated value;
in the discharging current limiting module, when the temperature of a single battery module is detected to reach a second set temperature value, the discharging current limiting value of the battery module is modified into a second designated value; recovery conditions are as follows: when the working state of the battery module is converted into non-discharge state, the discharge current-limiting value is recovered to a second set current value from a second specified value;
in the discharging current limiting module, when the SOC of a single battery module is detected to reach a second proportional value, the discharging current limiting value of the battery module is modified to a second specified value; recovery conditions are as follows: and when the working state of the battery module is converted into non-discharge state, the discharge current limiting value is recovered to a second set current value from a second set value.
9. The home energy storage system according to claim 8, wherein the first set current value is 25A, the first specified value is 5A, the first set voltage value is 3.65V, the first set temperature value is 55 degrees celsius, and the first proportional value is 95%; the set current value is 50A, the second specified value is 15A, the second set current value is 25A, the second set voltage value is 2.5V, the second set temperature value is 55 degrees centigrade, and the second proportional value is 10%.
10. The home energy storage system according to any one of claims 6 to 9, further comprising a polling module, a checking module,
a polling module: the inverter issues a polling command;
a checking module: and (4) checking whether the data of the battery system is complete, if so, operating the charging judgment module, and if not, ending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010275387.7A CN111509795B (en) | 2020-04-09 | 2020-04-09 | Household energy storage method and system with charging and discharging current reduction strategy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010275387.7A CN111509795B (en) | 2020-04-09 | 2020-04-09 | Household energy storage method and system with charging and discharging current reduction strategy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111509795A CN111509795A (en) | 2020-08-07 |
| CN111509795B true CN111509795B (en) | 2023-03-14 |
Family
ID=71864855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010275387.7A Active CN111509795B (en) | 2020-04-09 | 2020-04-09 | Household energy storage method and system with charging and discharging current reduction strategy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111509795B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340156A (en) * | 2010-07-26 | 2012-02-01 | 联想(北京)有限公司 | Charging and discharging method for terminal and terminal |
| CN108282007B (en) * | 2018-02-12 | 2020-12-25 | 中航锂电技术研究院有限公司 | Communication battery module charging current limiting strategy |
| CN110768330B (en) * | 2019-10-18 | 2023-05-26 | 湖南小步科技有限公司 | Charging and discharging control method and device and UPS system |
| CN110931904B (en) * | 2019-11-28 | 2021-06-25 | 湖南海博瑞德电智控制技术有限公司 | Lithium battery charging and discharging control method |
-
2020
- 2020-04-09 CN CN202010275387.7A patent/CN111509795B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111509795A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101969214B (en) | Battery pack and control method thereof | |
| CN206313488U (en) | A kind of lithium battery safety management system | |
| US8907616B2 (en) | Hybrid power supply system | |
| CN112737015B (en) | Lithium battery balance control system and control method based on SOC | |
| CN108282007B (en) | Communication battery module charging current limiting strategy | |
| CN110429671A (en) | A kind of electric car high-adaptability charging system and method | |
| CN108155657B (en) | Energy storage converter, main circuit topology structure thereof and balance control method | |
| CN102842937B (en) | Charging/discharging controlling system of serial storage battery set and charging/discharging optimizing method | |
| CN107681733A (en) | Battery balanced module and distributed battery energy storage balancer | |
| CN102624065A (en) | Charging-discharging control circuit of vehicular power battery pack | |
| CN203103992U (en) | Battery module management and control system | |
| CN110843599A (en) | High-capacity lithium battery pack charging and discharging control system and control method thereof | |
| CN111509795B (en) | Household energy storage method and system with charging and discharging current reduction strategy | |
| CN202564988U (en) | Charge-discharge control circuit for vehicle-use power battery | |
| CN211957833U (en) | Battery equalization repairing system | |
| CN211252276U (en) | Charge-discharge control system of large-capacity lithium battery pack | |
| CN209948760U (en) | Battery equalization system | |
| CN2922233Y (en) | Over-charging protecting circuit for power lithium ion cell | |
| CN102969754B (en) | Storage battery pack connection circuit and intelligent storage battery pack | |
| CN112165130A (en) | Servo power supply with independently controllable charging and discharging and implementation method thereof | |
| CN109873438A (en) | A kind of main control type equilibrium networking energy storage method and system | |
| CN220562583U (en) | Multi-group battery parallel control system of electric vehicle | |
| CN110661315A (en) | Active equalization device and method for energy storage power station battery | |
| CN204361198U (en) | Battery management system and high pressure Detection & Controling main controller thereof | |
| CN211127176U (en) | Active equalization device for battery of energy storage power station |
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 | ||
| GR01 | Patent grant |