CN117833398A - Battery awakening method of energy storage converter - Google Patents
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Abstract
The invention discloses a battery awakening method of an energy storage converter. The battery wake-up method comprises the following steps: step S1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result; step S2, calculating the conduction time t of the Boost switch tube 1 And controls the Boost switch tube at t 1 Conducting in a long time; s3, acquiring a real-time current value of the Boost inductor; step S4, judging whether the real-time current value of the Boost inductor is smaller than the rated off-current value, if yes, jumping to step S5; if not, jumping to the step S3; step S5, judging whether a communication connection signal of the battery unit can be detected, if so, the battery is awakened successfully; if not, the process goes to step S1. The battery wake-up method realizes the accurate control of the battery port voltage, the controllable lifting of the battery voltage, the fluctuation of the battery current in the battery activation process is reduced, and the battery wake-up method is improvedThe service life of the battery is prolonged.
Description
Technical Field
The invention belongs to the field of converters, and particularly relates to a battery awakening method of an energy storage converter.
Background
The current transformer, such as a light storage integrated machine, a photovoltaic inverter, an energy storage inverter or a mobile energy storage device, is generally provided with a battery unit inside, and because the battery unit still has certain power consumption in a standby or under-voltage protection state, the battery unit can cause overdischarge of a battery, the safety of a battery core is affected, and the service life of the battery is reduced, so that the battery unit generally needs to have a standby dormancy or under-voltage dormancy function. After the battery unit is dormant, the converter firstly needs to apply certain voltage to the port of the battery unit so as to wake up the battery unit to work normally.
The current battery awakening scheme is that the power grid is firstly subjected to uncontrollable rectification to a high-voltage side bus capacitor, and then is subjected to DC/DC, so that the regulation of the voltage of a battery port is realized, and the dormancy awakening of the battery is realized. Depending on the battery activation mode of the grid voltage, the PV photovoltaic panel can output voltage in the daytime without a grid, remote wake-up is not supported, and energy is wasted. It is also difficult to achieve smooth off-grid loading without battery start-up. The other battery awakening mode is that Boost always carries out wave beating with the minimum duty ratio, so that the transmission of the minimum power is realized, and the wave beating is stopped at any time by monitoring the voltage of a battery port, so that the power transmission is stopped. However, considering that the port capacitance on the battery side tends to be large, the battery port voltage rises slowly and the efficiency is low when the wave is generated at the minimum duty ratio.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide an improved battery awakening method of an energy storage converter.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a battery wake-up method of an energy storage converter, comprising:
step S1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step S2, calculating the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 Conducting in a long time;
s3, acquiring a real-time current value of the Boost inductor;
step S4, judging whether the real-time current value of the Boost inductor is smaller than the rated off-current value, if yes, jumping to step S5; if not, jumping to the step S3;
step S5, judging whether a communication connection signal of the battery unit can be detected, if so, the battery is awakened successfully; if not, the process goes to step S1.
Preferably, step S1 specifically includes:
s11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step S12; if the judgment result is negative, jumping to the step S13;
s12, acquiring a first battery voltage rise value and jumping to the step S2;
s13, acquiring a second battery voltage rising value and jumping to the step S2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
Preferably, step S2 specifically includes:
step S21, calculating T based on the following formula (1) 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step S22, based on the T 1 The inductance current at the moment and the following formula (2) are calculated to obtain the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 The conduction is carried out within a long time period,
preferably, the real-time current value of the Boost inductor in step S4 is obtained by a current sensor.
Preferably, step S5 includes: step S51, after the energy storage converter is electrified, detecting whether the battery unit has CAN communication signals to pass or not, if yes, the battery is successfully awakened; if not, the process goes to step S1.
Preferably, the energy storage converter performs the battery wake-up method when the PV panel outputs voltage and the grid does not output voltage.
A battery wake-up method of an energy storage converter, comprising:
a1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step A2, respectively calculating the on-time t of the Boost switch tube 1 And the turn-off time t of the Boost switch tube 2 And controlling the Boost switch tube to be at t 1 Conducting for a long time, at t 2 Turning off in a long time;
step A3, boost switching tube is completed at t 1 Conducting for a long time, at t 2 Judging whether the communication connection signal of the battery unit can be detected after the battery unit is turned off within the duration, if so, the battery is successfully awakened; if not, the process jumps to step A1.
Preferably, step A1 specifically includes:
a11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step A12; if the judgment result is negative, jumping to the step A13;
a12, acquiring a first battery voltage rising value and jumping to the step A2;
a13, acquiring a second battery voltage rising value and jumping to the step A2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
Preferably, step A2 specifically includes:
step A21, based on the followingCalculating the formula (3) to obtain T 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step A22, based on the T 1 The inductance current at the moment and the following formula (4) are calculated to obtain the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 The conduction is carried out within a long time period,
step A23, based on the T 1 The inductance current at the moment and the following formula (5) are calculated to obtain the turn-off time t of the Boost switch tube 2 And controlling the Boost switch tube to be at t 2 The switch-off is performed within a period of time,
preferably, step A3 comprises:
step A31, after the energy storage converter is electrified, detecting whether the battery unit has CAN communication signals to pass, if so, the battery is successfully awakened; if not, the process jumps to step A1.
Preferably, the energy storage converter performs the battery wake-up method when the PV panel outputs voltage and the grid does not output voltage.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the battery wake-up method of the energy storage converter, whether the battery port voltage reaches the battery activation voltage or not is detected in advance, and the corresponding battery voltage rise value is obtained, so that the on-time of the Boost switch tube is calculated, accurate control of the battery port voltage is achieved in an intermittent wave-beating mode, controllable rise of the battery voltage is achieved, fluctuation of battery current in the battery activation process is reduced, and the service life of the battery is prolonged.
In a further preferred scheme, when the battery port voltage does not reach the battery activation voltage, the battery voltage rise value set by single wave beating can be larger (second battery voltage rise value), so that the wake-up efficiency is ensured; when the battery port voltage reaches the battery activation voltage, the battery voltage rise value may be set smaller (first battery voltage rise value), ensuring that the battery transient impact is smaller.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a hardware topology diagram of a battery wake-up method according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a battery wake-up method according to a first embodiment of the invention;
FIG. 3 is a flowchart of a battery wake-up method according to a first embodiment of the invention;
FIG. 4 is a flowchart of a battery wake-up method according to a first embodiment of the present invention;
FIG. 5 is a time-inductor current line graph according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the turn-on of a Boost switch in accordance with a first embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating another embodiment of a Boost switch tube;
FIG. 8 is a schematic diagram illustrating a Boost switch in accordance with an embodiment of the present invention;
FIG. 9 is a flowchart of a battery wake-up method according to a second embodiment of the invention;
FIG. 10 is a flowchart of a battery wake-up method according to a second embodiment of the present invention;
FIG. 11 is a flowchart of a battery wake-up method according to a second embodiment of the present invention;
wherein, 11, PV photovoltaic panel; 12. a battery unit; 13. a power grid; 21. boost module; 22. a DC/DC module; 23. an inversion module; c (C) 1 Boost input capacitance; l, boost inductance; s, boost switching tube; D. boost diode; c (C) 2 Low voltage bus capacitor.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The energy storage converter in the embodiment specifically comprises a light storage integrated machine, a photovoltaic inverter, an energy storage inverter or mobile energy storage equipment. As shown in fig. 1, the battery wake-up process in this embodiment refers to the hardware system in fig. 1, wherein the PV panel 11 outputs voltage for powering the battery wake-up process, while the grid 13 does not output voltage. A Boost module 21 and a low-voltage bus capacitor C are sequentially connected in series between the PV photovoltaic panel 11 and the battery unit 12 2 . Specifically, boost module 21 includes Boost input capacitance C 1 A Boost inductor L, boost switching tube S and a Boost diode D. Boost input capacitance C 1 Is connected to the junction of the PV panel 11 and the Boost inductor L, boost input capacitor C 1 Is connected to the other end of the PV panel 11 and the low voltage bus capacitor C 2 Is connected to the connecting point of (c). One end of the Boost inductor L is connected to the PV photovoltaic panel 11 and the other end of the Boost inductor L is connected to the Boost diode D. One end of the Boost switch tube S is connected to the connection point of the Boost inductor L and the Boost diode D, and the other end of the Boost switch tube S is connected to the PV photovoltaic panel 11 and the low voltageBus-bar capacitor C 2 Is connected to the connecting point of (c). One end of the Boost diode D is connected to the Boost inductor L, and the other end of the Boost diode D is connected to the low-voltage bus capacitor C 2 。
The battery unit 12 and the power grid 13 are sequentially connected in series with a DC/DC module 22 and an inverter module 23. The DC/DC module 22 mainly serves as an isolation function, and may be specifically a dual active bridge (Dual Active Bridge, DAB) circuit. The inverter module 23 includes a first inverter bridge arm and a second inverter bridge arm connected in parallel, where the first inverter bridge arm and the second inverter bridge arm respectively include two switch modules connected in series, each switch module includes a diode and a power switch connected in parallel, and the power switch is an insulated gate bipolar transistor or a MOS transistor.
As shown in fig. 2 to fig. 4, this embodiment further discloses a battery wake-up method of the energy storage converter, including:
step S1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step S2, calculating the conduction time t of the Boost switch tube 1 And controls the Boost switch tube at t 1 Conducting in a long time;
s3, acquiring a real-time current value of the Boost inductor;
step S4, judging whether the real-time current value of the Boost inductor is smaller than the rated off-current value, if yes, jumping to step S5; if not, jumping to the step S3;
step S5, judging whether a communication connection signal of the battery unit can be detected, if so, the battery is awakened successfully; if not, the process goes to step S1.
Preferably, step S1 specifically includes:
s11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step S12; if the judgment result is negative, jumping to the step S13;
s12, acquiring a first battery voltage rise value and jumping to the step S2;
s13, acquiring a second battery voltage rising value, and jumping to the step S2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
When the state of charge (SOC), state of health (SOH), temperature, etc. of the battery are different, the minimum voltage at which the battery is activated changes. And at the moment of battery activation, the battery discharges, and the Boost switch tube S is opened. When the external voltage of the battery (energy storage converter control) is larger than the voltage of the battery port, larger current impact is easy to generate, so that the battery port voltage is required to be slowly and controllably lifted in order to reduce the current fluctuation of the battery in the battery activation process.
During normal grid-connected or off-grid on-load operation, the input power is controlled by the side of the PV photovoltaic panel 11. While during battery activation, the DC/DC module 22 is inactive with only the low voltage bus capacitance C 2 Energy storage is needed to control the input of the PV photovoltaic panel 11 to the low-voltage bus capacitor C 2 Is a function of the energy of the (c). When the Boost switch tube S is turned on, the Boost inductor L stores energy, and when the Boost switch tube S is turned off, the energy of the Boost inductor L is transmitted to the low-voltage bus capacitor C 2 The energy transmitted by it depends on the inductive current at the moment of turn-off and on the PV photovoltaic panel 11 and the capacitive low-voltage bus capacitor C 2 Is set in the above-described voltage range. That is, when the battery port voltage is detected to the set value, the switch tube S is turned off, and the energy of the inductor is continuously supplied to the capacitor C 2 Charging, further lifting the capacitor C 2 A voltage.
Therefore, in this embodiment, an intermittent wave-beating manner is provided, and accurate control of the battery port voltage is achieved by reversely pushing the on and off time of the Boost switch tube S by presetting the battery voltage lifting value. The Boost inductor L is charged to a set current value by conducting the Boost switch tube S, and the voltage is controlled by the PV photovoltaic panel 11 and the low-voltage bus capacitor C 2 After the voltage pre-calculates that the Boost switch tube S is turned off, the Boost inductor L gives the capacitor C1 a low-voltage bus capacitor C 2 To thereby deduce and set the battery voltage rise value in advance. Further, when the battery port voltage does not reach the battery activation voltage, the battery voltage rise value set by single wave beating can be larger (second battery voltage rise value), so that the wake-up efficiency is ensured; when the voltage of the battery port reaches the battery excitationAt the active voltage, the battery voltage rise value can be set smaller (first battery voltage rise value), so that the battery transient impact is ensured to be smaller. For example, the battery voltage rise value of the single PWM wave generation may be set to 2V before the battery port voltage reaches 36V, and the battery voltage rise value of the single PWM wave generation may be set to 0.2V after the battery port voltage reaches 36V.
Further, step S2 specifically includes:
step S21, calculating T based on the following formula (1) 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step S22, based on T 1 The inductance current at the moment and the following formula (2) are calculated to obtain the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 Conducting in a long time;
referring to fig. 5, the Boost switch S is turned on for a time period t 1 At this time, as the on-time increases, the inductance current of the Boost inductance L increases linearly. The Boost switch tube S is turned off, the inductance current of the Boost inductor L is reduced, and the low-voltage bus capacitor C 2 The voltage rises until the inductor current of the Boost inductor L decreases to 0.
The process of turning on the Boost switch S does not Boost the battery voltage, which first stores energy in the inductor L by boosting the inductor current of the Boost inductor L. Then the energy of the inductor L after the Boost switch tube S is turned off is utilized to supply the low-voltage bus capacitor C 2 Charging is carried out, and the effect of lifting the voltage of the battery port is achieved. Continuous execution ofThe Boost single wave is intermittent wave, and the controllable lifting of the battery voltage can be realized. In FIG. 5, 0 to t 1 During the period, boost inductor L is in the charging stage, at t 1 To t 2 During a period of time, the Boost inductor L is in a discharge stage and flows into the capacitor C 2 The change value of the capacitance voltage can be specifically referred to formula (1). It should be noted that, when the intermittent wave-beating is started to raise the battery port voltage, V is set at time 0 in fig. 5 C,0 ≈V PV Delta V of it c The calculated deviation from the actual value is larger and can be further usedThe battery voltage rise value is further deduced. In the present embodiment, the battery voltage increase value Δv can be set directly in advance c And reversely pushing out the on-time t of the Boost switch tube S 1 。
The battery voltage rise is also limited by the current protection value of the Boost module 21. In order to avoid the overhigh voltage of the battery port, the on-time t of the Boost switch tube S can be properly reduced on the basis of theoretical calculation 1 In actual control, the control period is fixed, and the control is realized through the duty ratio. As shown in connection with FIGS. 6 to 8, T s Representing PWM period, S represents the on condition of Boost switching tube S, s=1 represents on, and s=0 represents off. t is t 1 <T s In the case, as shown in FIG. 6, the duty cycle ist 1 ＞T s When, as shown in fig. 6 and 7, it is realized by a multicycle duty cycle of 1 (as shown in fig. 7) or t is to 1 The distribution to the plurality of PWM periods (the duty cycle may be changed stepwise from large to small as shown in fig. 8), and is not limited in particular herein.
Further, the real-time current value of the Boost inductor (i.e. the current value of the Boost inductor L) in step S4 is obtained by a current sensor. The rated off-current value in step S4 may be preset to a smaller value close to 0, and when the inductor current decreases to or below the rated off-current value, the single beat is considered to be completed.
The step S5 comprises the following steps:
step S51, after the energy storage converter is electrified, detecting whether the battery unit has CAN communication signals to pass or not, if yes, the battery is successfully awakened; if not, the process goes to step S1. And if the CAN communication signal CAN be detected after single wave beating, the battery is considered to be successfully awakened. And if the CAN communication signal cannot be detected, repeating the steps S1 to S5 until the wake-up of the energy battery is successful, wherein the process is intermittent wave beating.
Example two
The second embodiment is basically the same as the first embodiment, except that, as shown in fig. 9 to 11, the battery wake-up method of the energy storage converter includes:
a1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step A2, respectively calculating the on-time t of the Boost switch tube 1 And the turn-off time t of the Boost switch tube 2 And controls the Boost switch tube at t 1 Conducting for a long time, at t 2 Turning off in a long time;
step A3, boost switching tube is completed at t 1 Conducting for a long time, at t 2 Judging whether the communication connection signal of the battery unit can be detected after the battery unit is turned off within the duration, if so, the battery is successfully awakened; if not, the process jumps to step A1.
Preferably, step A1 specifically includes:
a11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step A12; if the judgment result is negative, jumping to the step A13;
a12, acquiring a first battery voltage rising value and jumping to the step A2;
a13, acquiring a second battery voltage rising value and jumping to the step A2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
Further, the step A2 specifically includes:
step A21, based on the following formula (3)Calculating to obtain T 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step A22, based on T 1 The inductance current at the moment and the following formula (4) are calculated to obtain the conduction time t of the Boost switch tube 1 And controls the Boost switch tube at t 1 The conduction is carried out within a long time period,
step A23, based on T 1 The inductance current at the moment and the following formula (5) are calculated to obtain the turn-off time t of the Boost switch tube 2 And controls the Boost switch tube at t 2 The switch-off is performed within a period of time,
wherein, formula (5) is derived from formula (6), and formula (6) is specifically:
substitution of i L ＝0，t＝t 2 Equation (5) can be obtained.
In the second embodiment, the real-time current value of the Boost inductor is not required to be obtained, and the turn-off time t of the Boost switch tube is directly deduced according to the battery voltage lifting value 2 Waiting for the Boost switch tube to be at t 1 Conducting for a long time, at t 2 And after the closing in the duration, completing the single wave beating.
The duty ratio of each PWM period is described in detail herein with reference to embodiment one.
In summary, the battery wake-up method and system in the embodiment have the following advantages:
1. the method comprises the steps of detecting whether the battery port voltage reaches the battery activation voltage in advance and acquiring a corresponding battery voltage rising value so as to calculate the on-time of a Boost switch tube, realizing accurate control of the battery port voltage in an intermittent wave beating mode, realizing controllable lifting of the battery voltage, reducing fluctuation of battery current in the battery activation process, and prolonging the service life of the battery;
2. when the battery port voltage does not reach the battery activation voltage, the battery voltage rising value set by single wave beating can be larger (second battery voltage rising value), so that the wake-up efficiency is ensured; when the battery port voltage reaches the battery activation voltage, the battery voltage rise value can be set smaller (a first battery voltage rise value), so that the battery transient impact is ensured to be smaller;
3. under the condition that a power grid is not required to be electrified, the battery is activated through the PV photovoltaic panel, so that the battery is more convenient, the energy of the PV photovoltaic panel is not wasted after the battery is awakened, and the power generation efficiency is improved;
4. and the battery is activated by the voltage of the power grid, so that no additional controllable mechanical switch or controllable semiconductor switch is needed for reducing the current impact on the bus capacitor, the structure complexity is low, and the cost is low.
As used in this specification and in the claims, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The term "and/or" as used herein includes any combination of one or more of the associated listed items.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly or indirectly fixed or connected to the other feature. Further, the descriptions of the upper, lower, left, right, etc. used in the present invention are merely with respect to the mutual positional relationship of the constituent elements of the present invention in the drawings.
The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to be preferred embodiments for those skilled in the art to understand the present invention and implement the same according to the present invention, not to limit the scope of the present invention. All equivalent changes or modifications made according to the principles of the present invention should be construed to be included within the scope of the present invention.
Claims (11)
1. A method for waking up a battery of an energy storage converter, comprising:
step S1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step S2, calculating the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 Conducting in a long time;
s3, acquiring a real-time current value of the Boost inductor;
step S4, judging whether the real-time current value of the Boost inductor is smaller than the rated off-current value, if yes, jumping to step S5; if not, jumping to the step S3;
step S5, judging whether a communication connection signal of the battery unit can be detected, if so, the battery is awakened successfully; if not, the process goes to step S1.
2. The method for waking up a battery of an energy storage converter according to claim 1, wherein step S1 specifically comprises:
s11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step S12; if the judgment result is negative, jumping to the step S13;
s12, acquiring a first battery voltage rise value and jumping to the step S2;
s13, acquiring a second battery voltage rising value and jumping to the step S2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
3. The method for waking up a battery of an energy storage converter according to claim 1, wherein step S2 specifically comprises:
step S21, calculating T based on the following formula (1) 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step S22, based on the T 1 The inductance current at the moment and the following formula (2) are calculated to obtain the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 The conduction is carried out within a long time period,
4. the method according to claim 1, wherein the real-time current value of the Boost inductor in step S4 is obtained by a current sensor.
5. The method for waking up a battery of an energy storage converter according to claim 1, wherein step S5 comprises:
step S51, after the energy storage converter is electrified, detecting whether the battery unit has CAN communication signals to pass or not, if yes, the battery is successfully awakened; if not, the process goes to step S1.
6. The method of claim 1, wherein the energy storage converter performs the method of waking up the battery when the PV panel outputs voltage and the grid does not output voltage.
7. A method for waking up a battery of an energy storage converter, comprising:
a1, detecting the battery port voltage, judging whether the battery port voltage reaches the battery activation voltage, and acquiring a corresponding battery voltage rising value according to a judging result;
step A2, respectively calculating the on-time t of the Boost switch tube 1 And the turn-off time t of the Boost switch tube 2 And controlling the Boost switch tube to be at t 1 Conducting for a long time, at t 2 Turning off in a long time;
step A3, boost switching tube is completed at t 1 Conducting for a long time, at t 2 Judging whether the communication connection signal of the battery unit can be detected after the battery unit is turned off within the duration, if so, the battery is successfully awakened; if not, the process jumps to step A1.
8. The method for waking up a battery of an energy storage converter according to claim 7, wherein the step A1 specifically includes:
a11, detecting the battery port voltage and judging whether the battery port voltage reaches the battery activation voltage, if so, jumping to the step A12; if the judgment result is negative, jumping to the step A13;
a12, acquiring a first battery voltage rising value and jumping to the step A2;
a13, acquiring a second battery voltage rising value and jumping to the step A2, wherein the second battery voltage rising value is larger than the first battery voltage rising value.
9. The method for waking up a battery of an energy storage converter according to claim 7, wherein the step A2 specifically includes:
step A21, calculating T based on the following formula (3) 1 The inductor current at the moment in time,
wherein DeltaV c The battery voltage rise value is C is a capacitance value, L is an inductance value, i L,max Is T 1 Inductor current at moment of time V c Is the low voltage bus capacitor voltage, V PV Outputting voltage for the PV photovoltaic panel;
step A22, based on the T 1 The inductance current at the moment and the following formula (4) are calculated to obtain the conduction time t of the Boost switch tube 1 And controlling the Boost switch tube to be at t 1 The conduction is carried out within a long time period,
step A23, based on the T 1 The inductance current at the moment and the following formula (5) are calculated to obtain the turn-off time t of the Boost switch tube 2 And controlling the Boost switch tube to be at t 2 The switch-off is performed within a period of time,
10. the method for waking up a battery of an energy storage converter according to claim 7, wherein step A3 includes:
step A31, after the energy storage converter is electrified, detecting whether the battery unit has CAN communication signals to pass, if so, the battery is successfully awakened; if not, the process jumps to step A1.
11. The method of claim 7, wherein the energy storage converter performs the method of waking up the battery when the PV panel outputs voltage and the grid does not output voltage.
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