CN115051457A - Novel energy storage device battery charging method - Google Patents
Novel energy storage device battery charging method Download PDFInfo
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- CN115051457A CN115051457A CN202210843460.5A CN202210843460A CN115051457A CN 115051457 A CN115051457 A CN 115051457A CN 202210843460 A CN202210843460 A CN 202210843460A CN 115051457 A CN115051457 A CN 115051457A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004146 energy storage Methods 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 66
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000012937 correction Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000010248 power generation Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process 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
- H02J7/34—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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- 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
- H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a novel energy storage device battery charging method, wherein an energy storage device based on the method comprises an input sampling module, a control module and a PWM module, and the method specifically comprises the following steps: s1, sampling and detecting the voltage at the input end through the input sampling module to obtain sampling data and sending the sampling data to the control module; s2, the control module judges whether the power input is AC input or DC input according to the sampling data, and outputs a corresponding control signal to the PWM module according to the judgment result; and S3, outputting PWM by the PWM module according to the received control signal. The invention has the advantages of high integration and contribution to improving the power density.
Description
Technical Field
The invention relates to the technical field of battery charging, in particular to a novel battery charging method for an energy storage device.
Background
With the rapid development of electronic technology, rechargeable batteries have been widely used in people's lives.
At present, a battery charging scheme widely applied to the field of energy storage is shown in fig. 1, for example, an AC power supply such as a mains supply and a generator charges a battery through an AC-DC converter, and in addition, the MPPT module charges the battery through a DC power supply provided by a solar panel. Because the input of the AC-DC converter is AC and the input of the MPPT module is DC, the AC-DC converter and the MPPT module are 2 independent units in the traditional scheme, so that the system can be charged by an AC power supply and can also be charged by a solar sailboard, only the AC-DC converter charging module and the MPPT charging module are arranged in the system, the cost is high, the number of devices is large, and the reliability of the system is low.
Disclosure of Invention
The invention aims to provide a novel energy storage device battery charging method which has the advantages of high integration and contribution to improving the power density.
The technical purpose of the invention is realized by the following technical scheme:
a novel energy storage device battery charging method is based on an energy storage device which comprises an input sampling module, a control module, a PWM module and a power conversion main circuit, and specifically comprises the following steps:
s1, sampling and detecting the voltage at the input end through the input sampling module to obtain sampling data and sending the sampling data to the control module;
s2, the control module judges whether the power input is AC input or DC input according to the sampling data, and outputs a corresponding control signal to the PWM module according to the judgment result;
and S3, outputting a PWM switching signal by the PWM module according to the received control signal so as to control the power conversion main circuit to switch.
Further setting: the input sampling module comprises an input port voltage measuring circuit, and the sampling data are specifically direct current components and alternating current components of the voltage of the input port.
Further setting: the control module includes a voltage resolution determination unit and a switch control unit, wherein step S2 specifically includes:
the voltage resolution judging unit judges AC input or DC input according to the sampling data;
if the voltage discrimination judging unit judges that the input is AC input and the amplitude of the AC component is between the preset AC voltage lower limit and the preset AC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting a PFC algorithm;
if the voltage resolution judging unit judges that the input is DC input and the amplitude of the DC component is between the preset DC voltage lower limit and the preset DC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting an MPPT algorithm.
Further setting: the sampling module further comprises an output voltage sampling unit and an input current sampling unit, and the output voltage sampling unit and the input current sampling unit are respectively used for sampling and detecting the output voltage and the input current of the power conversion main circuit.
Further setting: the switch control unit comprises a control subunit, a calculation subunit and a correction subunit,
the control subunit calculates a carrier frequency and a duty ratio according to the input current, the input voltage and the output voltage, and generates a control signal according to the carrier frequency and the duty ratio through a PFC algorithm or an MPPT algorithm;
the calculating subunit generates corresponding expected output voltage according to the sampling data, acquires output voltages of the power conversion main circuits in a plurality of acquisition periods through the output voltage sampling unit, and compares the output voltages of the power conversion main circuits with the expected output voltage to obtain a first deviation value and a second deviation value; comparing the first deviation value with the second deviation value to obtain a third deviation value, and generating a corresponding correction parameter according to the third deviation value;
and the correction subunit corrects the control signal according to the correction parameter to obtain a new control signal and outputs the new control signal.
Further setting: the comparing the output voltages of the power conversion main circuits with the expected output voltages to obtain a first deviation value and a second deviation value specifically includes:
comparing the output voltages to obtain a maximum output voltage and a minimum output voltage;
comparing the maximum output voltage with the expected output voltage to obtain a first deviation value;
and comparing the minimum output voltage with the expected output voltage to obtain a second deviation value.
Further setting: comparing the first deviation value with the second deviation value to obtain a third deviation value specifically includes:
and calculating to obtain a first adjusting value through the first deviation value and a preset first weight adjusting parameter, calculating to obtain a second adjusting value through the second deviation value and a preset second weight adjusting parameter, and obtaining a third deviation value through the average value of the first adjusting value and the second adjusting value.
In conclusion, the invention has the following beneficial effects: the converter which combines AC-DC and DC-DC is realized by adjusting the measurement method and the control method for the AC-DC converter, the photovoltaic power generation MPPT function can be realized in addition to the AC-DC function, a power conversion main circuit and devices thereof are not added, the cost of the main circuit is not increased, and the requirements that the battery can be charged by the power supplied by the AC power supply and the battery can be charged by the power supplied by the DC power supply provided by the solar sailboard are met.
1. Can be highly integrated, and is beneficial to improving the power density. The converter and the MPPT module are integrated together, so that the space utilization rate of a power supply is improved;
2. the cost is reduced, the AC-DC converter and the photovoltaic power generation MPPT are integrated, and compared with the traditional AC-DC converter, the photovoltaic power generation MPPT function is added under the condition that the cost of a power conversion main circuit is not increased.
3. The system design is simplified, the number of devices is reduced, and the system reliability is improved.
Drawings
FIG. 1 is a block diagram of a prior art battery charging scheme;
fig. 2 is a block diagram of the battery charging scheme in the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
a novel energy storage device battery charging method is based on an energy storage device which comprises an input sampling module, a control module, a PWM module and a power conversion main circuit, and specifically comprises the following steps:
s1, sampling and detecting the voltage at the input end through the input sampling module to obtain sampling data and sending the sampling data to the control module;
s2, the control module judges whether the power input is AC input or DC input according to the sampling data, and outputs a corresponding control signal to the PWM module according to the judgment result;
and S3, outputting a PWM switching signal by the PWM module according to the received control signal so as to control the power conversion main circuit to switch.
The input sampling module comprises an input port voltage measuring circuit, and the sampling data are specifically direct current components and alternating current components of the voltage of the input port.
The control module includes a voltage resolution determination unit and a switch control unit, wherein step S2 specifically includes:
the voltage resolution judging unit judges AC input or DC input according to the sampling data;
if the voltage discrimination judging unit judges that the input is AC input and the amplitude of the AC component is between the preset AC voltage lower limit and the preset AC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting a PFC algorithm;
and if the voltage resolution judging unit judges that the input is DC input and the amplitude of the DC component is between the preset DC voltage lower limit and the preset DC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting an MPPT algorithm.
The converter may be one-way in power flow, and the AC and solar panel inputs flow to the battery side to realize the battery charging function, but is not limited thereto. The converter can also be a bidirectional converter which can realize bidirectional flow of power flow, namely, the converter can realize the flow from the input of AC and solar sailboards to the battery side to realize the battery charging function, and can also supply energy by the battery, and the converter works in a DC-AC mode to realize the battery discharging function.
The converter which combines AC-DC and DC-DC is realized by adjusting and controlling the AC-DC converter, and under the DC-DC working mode, the MPPT function can be realized, but no device is added, the cost is not increased, and simultaneously, the converter can not only supply power to the battery by the AC power supply, but also supply power to the battery by the DC power supply provided by the solar sailboard. The first point has the beneficial effects that: can be highly integrated, and is beneficial to improving the power density. The converter and the MPPT module are integrated together, so that the space utilization rate of a power supply is improved; the second point has the beneficial effects that: the cost is reduced, and the converter and the MPPT are integrated together and are completed under the condition of not increasing the cost. The third point has the beneficial effects that: the system design is simplified, the number of devices is reduced, and the system reliability is improved.
Example 2:
a novel energy storage device battery charging method is based on an energy storage device which comprises an input sampling module, a control module, a PWM module and a power conversion main circuit, and specifically comprises the following steps:
s1, sampling and detecting the voltage at the input end through the input sampling module to obtain sampling data and sending the sampling data to the control module;
s2, the control module judges whether the power input is AC input or DC input according to the sampling data, and outputs a corresponding control signal to the PWM module according to the judgment result;
and S3, outputting a PWM switching signal by the PWM module according to the received control signal so as to control the power conversion main circuit to switch.
The input sampling module comprises an input port voltage measuring circuit, and the sampling data are specifically direct current components and alternating current components of the voltage of the input port.
The control module includes a voltage resolution determination unit and a switch control unit, wherein step S2 specifically includes:
the voltage resolution judging unit judges AC input or DC input according to the sampling data;
if the voltage resolution judging unit judges that the input is AC input and the amplitude of the alternating current component is between the preset AC voltage lower limit and the preset AC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting a PFC algorithm;
and if the voltage resolution judging unit judges that the input is DC input and the amplitude of the DC component is between the preset DC voltage lower limit and the preset DC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting an MPPT algorithm.
The sampling module further comprises an output voltage sampling unit and an input current sampling unit, wherein the output voltage sampling unit and the input current sampling unit are respectively used for sampling and detecting the output voltage and the input current of the power conversion main circuit.
The switch control unit comprises a control subunit, a calculation subunit and a correction subunit,
the control subunit calculates a carrier frequency and a duty ratio according to the input current, the input voltage and the output voltage, and generates a control signal according to the carrier frequency and the duty ratio through a PFC algorithm or an MPPT algorithm;
the calculating subunit generates corresponding expected output voltage according to the sampling data, acquires output voltages of the power conversion main circuits in a plurality of acquisition periods through the output voltage sampling unit, and compares the output voltages of the power conversion main circuits with the expected output voltage to obtain a first deviation value and a second deviation value; comparing the first deviation value with the second deviation value to obtain a third deviation value, and generating a corresponding correction parameter according to the third deviation value;
and the correction subunit corrects the control signal according to the correction parameter to obtain a new control signal and outputs the new control signal.
Further setting: the step of comparing the output voltages of the power conversion main circuits with expected output voltages to obtain a first deviation value and a second deviation value specifically includes:
comparing the output voltages to obtain a maximum output voltage and a minimum output voltage;
comparing the maximum output voltage with the expected output voltage to obtain a first deviation value;
and comparing the minimum output voltage with the expected output voltage to obtain a second deviation value.
Further setting: comparing the first deviation value with the second deviation value to obtain a third deviation value specifically comprises:
and calculating to obtain a first adjusting value through the first deviation value and a preset first weight adjusting parameter, calculating to obtain a second adjusting value through the second deviation value and a preset second weight adjusting parameter, and obtaining a third deviation value through the average value of the first adjusting value and the second adjusting value.
The control signal is corrected by obtaining a correction parameter through comparing and calculating the sampled output voltage and the expected output voltage of the power conversion main circuit, the correction parameter comprises correction of duty ratio control, the output voltage is closer to the expected output voltage, and a better charging effect is achieved.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (7)
1. A novel energy storage device battery charging method is characterized in that an energy storage device based on the method comprises an input sampling module, a control module, a PWM module and a power conversion main circuit, and specifically comprises the following steps:
s1, sampling and detecting the voltage at the input end through the input sampling module to obtain sampling data and sending the sampling data to the control module;
s2, the control module judges whether the power input is AC input or DC input according to the sampling data, and outputs a corresponding control signal to the PWM module according to the judgment result;
and S3, outputting a PWM switching signal by the PWM module according to the received control signal so as to control the power conversion main circuit to switch.
2. The novel energy storage device battery charging method as claimed in claim 1, wherein the input sampling module comprises an input port voltage measurement circuit, and the sampling data is specifically a direct current component and an alternating current component of an input port voltage.
3. The method according to claim 2, wherein the control module comprises a voltage resolution determination unit and a switch control unit, and wherein step S2 specifically comprises:
the voltage resolution judging unit judges AC input or DC input according to the sampling data;
if the voltage resolution judging unit judges that the input is AC input and the amplitude of the alternating current component is between the preset AC voltage lower limit and the preset AC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting a PFC algorithm;
and if the voltage resolution judging unit judges that the input is DC input and the amplitude of the DC component is between the preset DC voltage lower limit and the preset DC voltage upper limit, the switch control unit outputs a corresponding control signal to the PWM module by adopting an MPPT algorithm.
4. The novel energy storage device battery charging method according to claim 1, wherein the sampling module further comprises an output voltage sampling unit and an input current sampling unit, and the output voltage sampling unit and the input current sampling unit are respectively used for sampling and detecting the output voltage and the input current of the power conversion main circuit.
5. The novel energy storage device battery charging method as claimed in claim 4, wherein the switch control unit comprises a control subunit, a calculation subunit and a correction subunit,
the control subunit calculates a carrier frequency and a duty ratio according to the input current, the input voltage and the output voltage, and generates a control signal according to the carrier frequency and the duty ratio through a PFC algorithm or an MPPT algorithm;
the calculating subunit generates corresponding expected output voltage according to the sampling data, acquires output voltages of the power conversion main circuits in a plurality of acquisition periods through the output voltage sampling unit, and compares the output voltages of the power conversion main circuits with the expected output voltage to obtain a first deviation value and a second deviation value; comparing the first deviation value with the second deviation value to obtain a third deviation value, and generating a corresponding correction parameter according to the third deviation value;
and the correction subunit corrects the control signal according to the correction parameter to obtain a new control signal and outputs the new control signal.
6. The method as claimed in claim 5, wherein the step of comparing the output voltages of the plurality of main power conversion circuits with the expected output voltages to obtain the first deviation value and the second deviation value comprises:
comparing the output voltages to obtain a maximum output voltage and a minimum output voltage;
comparing the maximum output voltage with the expected output voltage to obtain a first deviation value;
and comparing the minimum output voltage with the expected output voltage to obtain a second deviation value.
7. The method as claimed in claim 5, wherein comparing the first deviation value with the second deviation value to obtain a third deviation value comprises:
and calculating to obtain a first adjusting value through the first deviation value and a preset first weight adjusting parameter, calculating to obtain a second adjusting value through the second deviation value and a preset second weight adjusting parameter, and obtaining a third deviation value through the average value of the first adjusting value and the second adjusting value.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202435314U (en) * | 2012-01-09 | 2012-09-12 | 中国科学院广州能源研究所 | MPPT (maximum-power-tracking)-type solar air-conditioning system |
| CN107911016A (en) * | 2017-12-07 | 2018-04-13 | 广东美的暖通设备有限公司 | The control device of Boost pfc circuits, control method |
| KR20180104873A (en) * | 2017-03-14 | 2018-09-27 | 주식회사 베가에너지 | Lithium battery protection system |
| KR20210051232A (en) * | 2019-10-30 | 2021-05-10 | 유수엽 | Adaptive Charging Control Apparatus and Method through Automatic DC/AC Recognition of Electric Vehicles |
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- 2022-07-18 CN CN202210843460.5A patent/CN115051457A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202435314U (en) * | 2012-01-09 | 2012-09-12 | 中国科学院广州能源研究所 | MPPT (maximum-power-tracking)-type solar air-conditioning system |
| KR20180104873A (en) * | 2017-03-14 | 2018-09-27 | 주식회사 베가에너지 | Lithium battery protection system |
| CN107911016A (en) * | 2017-12-07 | 2018-04-13 | 广东美的暖通设备有限公司 | The control device of Boost pfc circuits, control method |
| KR20210051232A (en) * | 2019-10-30 | 2021-05-10 | 유수엽 | Adaptive Charging Control Apparatus and Method through Automatic DC/AC Recognition of Electric Vehicles |
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