CN117254692B - Control method, battery system, device, equipment and medium for DC/DC converter - Google Patents

Control method, battery system, device, equipment and medium for DC/DC converter Download PDF

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Publication number
CN117254692B
CN117254692B CN202311502435.1A CN202311502435A CN117254692B CN 117254692 B CN117254692 B CN 117254692B CN 202311502435 A CN202311502435 A CN 202311502435A CN 117254692 B CN117254692 B CN 117254692B
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China
Prior art keywords
converter
sampling time
polarity
current
voltage
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CN202311502435.1A
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Chinese (zh)
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CN117254692A (en
Inventor
罗宇
林贵应
陈鹏辉
陈金山
潘先喜
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Abstract

The application discloses a control method, a battery system, a device, equipment and a medium of a DC/DC converter. The control method of the DC/DC converter comprises the following steps: acquiring a current direction which is required to be provided by the DC/DC converter at the current sampling time and a current direction which is provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time; if the current direction which is required to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to output the voltage with the second polarity from the current sampling time for a preset time length, and the preset time length is longer than the interval time length between the current sampling time and the previous sampling time. According to the embodiment of the application, the stability of the DC/DC converter is improved.

Description

Control method, battery system, device, equipment and medium for DC/DC converter
Technical Field
The present disclosure relates to the field of DC/DC converter control technologies, and in particular, to a control method, a battery system, a device, equipment, and a medium for a DC/DC converter.
Background
With the continuous development of modern power electronic technology and new energy industry, energy storage technology using a battery cabinet as a core unit is widely focused. Currently, the energy capacity of an energy storage power station can be improved in a mode of parallel connection of multi-branch battery clusters. However, with the increase of the number of the branches of the battery clusters, the current imbalance phenomenon of the energy storage power station caused by the difference of the branches of the battery clusters often occurs, so that the service life of the energy storage power station is shortened. Moreover, inter-cluster circulation due to branch differences also poses a safety risk. A common solution to this risk is to use a DC/DC (Direct Current/Direct Current) converter to regulate the voltage of each battery cluster, so as to achieve inter-cluster Current sharing.
The DC/DC converter may comprise a switching tube for controlling the polarity of the output voltage of the DC/DC converter, for example such a switching tube is called a directional tube, by controlling the state of which the polarity of the output voltage of the DC/DC converter may be controlled.
However, during the operation of the DC/DC converter, the state of the directional tube of the DC/DC converter is easy to be frequently switched, so that the polarity of the output voltage of the DC/DC converter is frequently switched, and the stability of the DC/DC converter is affected.
Disclosure of Invention
The application provides a control method, a battery system, a device, equipment and a medium of a DC/DC converter, which are beneficial to improving the stability of the DC/DC converter.
In a first aspect, the present application provides a control method of a DC/DC converter, including: acquiring a current direction which is required to be provided by the DC/DC converter at the current sampling time and a current direction which is provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time; if the current direction which is required to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to output the voltage with the second polarity from the current sampling time for a preset time length, and the preset time length is longer than the interval time length between the current sampling time and the previous sampling time.
In a possible implementation manner of the first aspect, obtaining a current direction that the DC/DC converter needs to provide at a current sampling time and a current direction that the DC/DC converter provides at a previous sampling time includes:
acquiring the current inner loop output duty ratio of the DC/DC converter at the current sampling time and the current inner loop output duty ratio of the DC/DC converter at the previous sampling time;
Determining the current direction which the DC/DC converter needs to provide at the current sampling moment according to the current inner loop output duty ratio of the DC/DC converter at the current sampling moment; and determining the current direction provided by the DC/DC converter at the previous sampling time according to the current inner loop output duty ratio of the DC/DC converter at the previous sampling time.
In a possible implementation manner of the first aspect, the method further includes:
and determining whether the DC/DC converter switches the polarity of the output voltage at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset time is over.
In a possible implementation manner of the first aspect, the method further includes:
if the DC/DC converter needs to switch the polarity of the output voltage back to the first polarity at each sampling time within the preset time, the DC/DC converter is controlled to switch the polarity of the output voltage back to the first polarity at the first sampling time after the preset time is over.
In a possible implementation manner of the first aspect, the method further includes:
setting a first upper limit and a lower limit of a current inner loop output duty ratio of the DC/DC converter in a preset time period, wherein the numerical values in the first upper limit and the lower limit are used for indicating the DC/DC converter to output voltage with a second polarity from the current sampling time and continuously for the preset time period.
In a possible implementation manner of the first aspect, the preset duration includes a first sampling time and a second sampling time, and the method further includes:
if the voltage value required to be output by the DC/DC converter at the first sampling time is different from the voltage value required to be output by the DC/DC converter at the second sampling time, taking different values in the first upper limit and the lower limit as actual values of the current inner loop output duty ratio of the DC/DC converter at the first sampling time and the second sampling time respectively.
In a possible implementation manner of the first aspect, the preset duration includes a third sampling time, and the method further includes:
and if the voltage required to be output by the DC/DC converter at the third sampling time is of the first polarity, taking the lower limit value of the first upper limit and the lower limit value as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
In a possible implementation manner of the first aspect, the method further includes:
after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, indicating the integral corresponding to the current inner loop output duty ratio of the DC/DC converter to zero.
In a possible implementation manner of the first aspect, the method further includes:
Setting a second upper limit and a second lower limit of the current inner loop output duty ratio of the DC/DC converter after the preset duration is over, wherein a numerical value in the second upper limit and the numerical value in the second lower limit are used for indicating the DC/DC converter to output voltage of a first polarity or a second polarity after the preset duration is over.
In a possible implementation manner of the first aspect, the method further includes:
and if the current direction which is required to be provided by the DC/DC converter at the current sampling time is the same as the current direction which is provided by the DC/DC converter at the previous sampling time, controlling the DC/DC converter to output the voltage with the first polarity at the current sampling time.
Based on the same inventive concept, in a second aspect, an embodiment of the present application further provides a battery system, wherein the battery system includes a controller, a plurality of parallel battery clusters, and a DC/DC converter connected to the battery clusters, and the controller is connected to the DC/DC converter;
a controller for acquiring a current direction required to be provided by the DC/DC converter at a current sampling time and a current direction provided by the DC/DC converter at a previous sampling time, wherein the DC/DC converter outputs a voltage of a first polarity at the previous sampling time;
if the current direction which is required to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the polarity of the output voltage of the DC/DC converter is controlled to be switched from the first polarity to the second polarity, the second polarity is controlled to be maintained within a preset time period from the current sampling time, and the preset time period is longer than the interval time period between the current sampling time and the previous sampling time.
Based on the same inventive concept, in a third aspect, embodiments of the present application further provide a control device of a DC/DC converter, where the device includes:
the data acquisition module is used for acquiring a current direction which is required to be provided by the DC/DC converter at the current sampling time and a current direction which is provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time;
the control module is used for controlling the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity if the current direction which is required to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, and controlling the DC/DC converter to maintain the second polarity within a preset time length from the current sampling time, wherein the preset time length is longer than the interval time length between the current sampling time and the previous sampling time.
Based on the same inventive concept, in a fourth aspect, an embodiment of the present application further provides an electronic device, including: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a method for controlling a DC/DC converter according to any one of the embodiments of the first aspect.
Based on the same inventive concept, in a fifth aspect, the embodiments of the present application further provide a computer readable storage medium, wherein the computer readable storage medium stores computer program instructions, and the computer program instructions implement the control method of the DC/DC converter according to any one of the embodiments of the first aspect when the computer program instructions are executed by a processor.
According to the embodiment of the application, under the condition that the current direction which is needed to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to switch the polarity of the output voltage, and the polarity after switching is maintained within the preset duration. Therefore, compared with the condition that the polarity of the output voltage of the DC/DC converter is locked within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being switched again within the preset time, namely the state of the directional tube in the DC/DC converter is prevented from being switched again within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being frequently switched, the problem that the state of the directional tube in the DC/DC converter is frequently switched is solved, and the stability of the DC/DC converter is improved.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a control method of a DC/DC converter according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of a battery system according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a DC/DC converter according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of a control method of a DC/DC converter according to another embodiment of the present application;
fig. 5 is a schematic flow chart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 6 is a schematic flow chart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 8 is a flowchart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
Fig. 9 is a schematic flow chart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 10 is a flowchart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
FIG. 11 is a schematic diagram illustrating a control direction of a DC/DC converter according to an embodiment of the present disclosure;
fig. 12 is a flowchart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 13 is a flowchart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 14 is a flowchart of a control method of a DC/DC converter according to another embodiment of the present disclosure;
fig. 15 is a schematic structural diagram of a control device of a DC/DC converter according to an embodiment of the present disclosure;
fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
In the drawings, the drawings are not necessarily to scale.
In the accompanying drawings:
100. a battery system;
10. a DC/DC converter;
11. a voltage regulation module; 12. an LLC resonant module; 121. a transformer;
20. a controller; 30. a battery cluster; 31. a first bus; 32. and a second bus bar.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The embodiment of the application provides a control method, a battery system, a device, equipment and a medium of a DC/DC converter, and the embodiment of the application will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the control method of the DC/DC converter provided in the embodiment of the present application includes S10 to S20.
S10, acquiring a current direction required to be provided by the DC/DC converter at the current sampling time and a current direction provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time;
s20, if the current direction which is needed to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, controlling the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity, and controlling the DC/DC converter to maintain the second polarity within a preset time period from the current sampling time, wherein the preset time period is longer than the interval time period between the current sampling time and the previous sampling time.
The specific implementation of each of the above steps will be described in detail below.
As one example, the DC/DC converter is connected to a battery cluster of a battery system. The DC/DC converter can adjust the voltage of the connected battery clusters to realize the inter-cluster current sharing.
If the ripple of the PCS (Power Conversion System, energy storage converter) in the battery system is disturbed, the state of the directional tube of the DC/DC converter is easy to be frequently switched, especially when the amplitude of the output voltage of the DC/DC converter is small, the state of the directional tube is easy to be frequently switched, so that the polarity of the output voltage of the DC/DC converter is frequently switched, and the stability of the DC/DC converter is affected.
According to the control method of the DC/DC converter provided by the embodiment of the application, under the condition that the current direction needed to be provided by the DC/DC converter at the current sampling time is different from the current direction provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to switch the polarity of the output voltage, and the polarity after switching is maintained within the preset duration. Therefore, compared with the condition that the polarity of the output voltage of the DC/DC converter is locked within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being switched again within the preset time, namely the state of the directional tube in the DC/DC converter is prevented from being switched again within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being frequently switched, the problem that the state of the directional tube in the DC/DC converter is frequently switched is solved, and the stability of the DC/DC converter is improved.
For example, the interval duration between the current sampling time and the previous sampling time may be regarded as one sampling period, and the current direction of the DC/DC converter may be periodically sampled. The preset time period is longer than the interval time period between the current sampling time and the previous sampling time, so that at least one sampling time can be included in the preset time period. According to the control method of the DC/DC converter, for any sampling time within the preset duration, even if the polarity of the output voltage of the DC/DC converter needs to be switched at the sampling time, the polarity of the output voltage of the DC/DC converter is still controlled not to be switched at the sampling time, so that the state of a directional pipe in the DC/DC converter does not need to be switched, the service life of the directional pipe in the DC/DC converter is prolonged, and the stability of the DC/DC converter is improved.
Illustratively, the predetermined time period is greater than the sampling period, and the predetermined time period is an integer multiple of the sampling period.
The preset duration is, for example, 5ms.
Of course, the specific value of the preset duration may be determined by actual requirements, which is not limited in this application.
The DC/DC converter in the embodiments of the present application is applicable to a battery system, for example. Referring to fig. 2, the battery system 100 may include a plurality of battery clusters 30 connected in parallel, and the DC/DC converter 10 is connected to the battery clusters 30. Each battery cluster 30 is made up of a plurality of batteries connected in series. When the battery system is charged and discharged, a voltage difference may occur between the plurality of battery clusters 30 to cause a current imbalance phenomenon, and damage is caused to the battery, so that the DC/DC converter 10 is connected to the battery clusters 30 as shown in fig. 2, and the voltage difference between the battery clusters 30 is reduced by the DC/DC converter 10.
The DC/DC converter can compensate the voltage of the battery cluster under the working state.
For example, the difference between the voltages of the battery clusters may be determined according to the voltages of the battery clusters, and the compensation voltages of the DC/DC converters corresponding to the battery clusters may be calculated, and the DC/DC converters may be controlled to output the corresponding compensation voltages. For example, one battery cluster and the DC/DC converter connected with the battery cluster are called one battery unit, the output total voltage of each battery unit is the sum of the battery cluster voltage and the compensation voltage output by the DC/DC converter, when the battery cluster voltages are different, the battery cluster voltage can be compensated by adjusting the value of the compensation voltage, that is, the output total voltage of each battery unit can be kept balanced.
The voltage output by the DC/DC converter may be a positive voltage or a negative voltage. For example, in the case where a certain battery cluster voltage is less than a target voltage, the DC/DC converter to which the battery cluster is connected may be used to output a positive voltage; in the case that the voltage of a certain battery cluster is greater than the target voltage, the DC/DC converter connected with the battery cluster can be used for outputting negative voltage, wherein the target voltage is the voltage required to be reached by a plurality of battery clusters. In other words, the DC/DC converter may be used to increase the total output voltage of the battery cells, and may also be used to decrease the total output voltage of the battery cells.
In the control method of the DC/DC converter provided in the embodiment of the present application, the first polarity and the second polarity are opposite. For example, the first polarity is positive and the second polarity is negative; alternatively, the first polarity is negative and the second polarity is positive.
For example, as shown in fig. 3, the DC/DC converter 10 may include a voltage regulation module 11, the voltage regulation module 11 including a plurality of branches, for example, the voltage regulation module 11 may include a first branch, a second branch, and a third branch, and the first branch, the second branch, and the third branch are connected in parallel. Each branch may include an upper switching tube and a lower switching tube connected in series. For example, the upper switching tube and the lower switching tube of the first branch are respectively labeled as an upper switching tube Q1 and a lower switching tube Q2; the upper switching tube and the lower switching tube of the second branch are respectively marked as an upper switching tube Q3 and a lower switching tube Q4; the upper switching tube and the lower switching tube of the third branch are respectively marked as an upper switching tube Q5 and a lower switching tube Q6.
In addition, the voltage regulation module 11 may further include a first inductor L1, a second inductor L2, and a first capacitor C1.
Illustratively, a first end of the first capacitor C1 is connected to the first node N1, a second end of the first capacitor C1 is connected to the second node N2, the first node N1 is connected to the third node N3 in fig. 2, and the second node N2 is connected to the first bus bar 31 in fig. 2. The first capacitor C1 may be used as a low-voltage side capacitor, and the first capacitor C1 may maintain stability of the output voltage of the DC/DC converter when the DC/DC converter is operated.
The output voltage of the DC/DC converter may refer to the voltage output by the first capacitor C1. Herein, the first capacitor C1 is a low-voltage side capacitor, and the output voltage of the DC/DC converter refers to the low-voltage side output voltage of the DC/DC converter.
The upper switching tube Q5 and the lower switching tube Q6 can be used to control the polarity of the output voltage of the DC/DC converter 10. That is, the upper switching transistor Q5 and the lower switching transistor Q6 are directional transistors in the DC/DC converter 10.
For example, when the upper switching tube Q5 is turned off and the lower switching tube Q6 is turned on, the voltage difference across the first capacitor C1 is positive, and the DC/DC converter outputs a positive voltage; when the upper switching transistor Q5 is turned on and the lower switching transistor Q6 is turned off, the voltage difference between the two ends of the first capacitor C1 is negative, and the DC/DC converter outputs a negative voltage. Here, the voltage difference across the first capacitor C1 may refer to a difference between the voltage at the second terminal and the voltage at the first terminal thereof, i.e., a difference between the voltage at the second node N2 and the voltage at the first node N1.
For example, in the steps S10 to S20, the first polarity is positive, the second polarity is negative, and the current direction to be provided at the current sampling time is different from the current direction provided at the previous sampling time, in this case, the upper switching tube Q5 and the lower switching tube Q6 in the DC/DC converter may be controlled to be turned off and turned on at the previous sampling time, and from the current sampling time, the upper switching tube Q5 and the lower switching tube Q6 in the DC/DC converter may be controlled to be turned off and turned on and turned off, respectively, and the state after the switching is maintained for a preset period of time.
For example, the switching transistors Q1, Q2, Q3, Q4 may include Metal-Oxide-semiconductor field effect transistors (MOSFETs) and the switching transistors Q1, Q2, Q3, Q4 may include body diodes D1, D2, D3, D4, respectively.
The voltage regulation module 11 may be a bi-directional buck-boost voltage regulation module. When the lower switching tube Q2 is turned off, the upper switching tube Q1, the diode D2 and the first inductor L1 form a first buck type voltage reducing circuit; when the lower switching tube Q4 is turned off, the upper switching tube Q3, the diode D4 and the second inductor L2 form a second buck type voltage-reducing circuit. The first buck voltage-reducing circuit and the second buck voltage-reducing circuit are connected in parallel to realize power supply to the later-stage load. Conversely, when the upper switching tube Q1 is turned off, the lower switching tube Q2, the diode D1 and the first inductor L1 form a first boost type boost circuit; when the upper switching tube Q3 is turned off, the lower switching tube Q4, the diode D3 and the second inductor L2 form a second boost circuit. The first boost circuit and the second boost circuit are connected in parallel to realize energy supplement to the front-end power supply.
Illustratively, as shown in FIG. 3, the DC/DC converter 10 may further include an LLC resonant module 12, which may include a third inductance L3, a third inductance L4, a second capacitance C2, a transformer 121, and switching tubes Q7-Q14. The LLC resonant module 12 can constitute a bi-directional isolated power supply module.
For example, as shown in fig. 3, a third capacitor C3 may be connected between the positive electrode and the negative electrode of the battery, and the third capacitor C3 may be used to maintain the high voltage output stability of the battery.
A fourth capacitor C4 may be connected between the LLC resonant module 12 and the voltage regulating module 11. The fourth capacitor C4 may be used for voltage regulation.
It can be understood that the DC/DC converter shown in fig. 3 can realize a four-quadrant power supply, and the energy can flow bidirectionally, so that the working efficiency is high.
It should be noted that, in fig. 3, the plurality of wires have a solid black dot at the intersection, which indicates that the plurality of wires are connected at the intersection; the fact that the plurality of wires have no black solid points at the intersections indicates that the plurality of wires have no connection relationship at the intersections.
In some embodiments, as shown in fig. 4, S10 in the control method of the DC/DC converter provided in the embodiment of the present application may include S11 and S12.
S11, acquiring the current inner loop output duty ratio of the DC/DC converter at the current sampling time and the current inner loop output duty ratio of the DC/DC converter at the previous sampling time;
s12, determining the current direction which the DC/DC converter needs to provide at the current sampling moment according to the current inner loop output duty ratio of the DC/DC converter at the current sampling moment; and determining the current direction provided by the DC/DC converter at the previous sampling time according to the current inner loop output duty ratio of the DC/DC converter at the previous sampling time.
The DC/DC converter may be controlled by a PID (proportional-integral-derivative control) control scheme, which may include an outer loop control, which may also be referred to as an outer loop voltage control, and an inner loop control, which may also be referred to as an inner loop current control. Wherein, the inner loop control aims at controlling the output current of the DC/DC converter so as to keep stable output. The inner loop control can make the DC/DC converter output current float within a prescribed range by adjusting the current inner loop output duty cycle. The current inner loop output duty cycle is understood to be the duty cycle of the PWM (Pulse Width Modulation ) signal of the switching tube in the DC/DC converter.
In the embodiment of the application, the current direction of the DC/DC converter is determined by acquiring the output duty ratio of the current inner loop, and the existing PID control mode of the DC/DC converter can be utilized, so that the implementation is convenient and easy.
The feedback loop is used for monitoring the output current of the DC/DC converter in real time in an inner loop control mode, the current inner loop output duty ratio is calculated through the PI controller, and the output current of the DC/DC converter is controlled and adjusted to be in a given range.
The magnitude of the current inner loop output duty cycle may be positive or negative. When the magnitude of the current inner loop output duty cycle is a positive number, the current inner loop output duty cycle can be used for indicating that the current direction of the DC/DC converter is a first direction and for indicating that the DC/DC converter outputs a voltage of a first polarity. When the magnitude of the output duty cycle of the current inner loop is negative, the current inner loop can be used for indicating the current direction of the DC/DC converter to be the second direction and indicating the DC/DC converter to output the voltage with the second polarity.
As an example, in the case where the magnitude of the current inner loop output duty ratio is a positive number, the current direction of the DC/DC converter may be set to 1, and the DC/DC converter may be controlled to output a voltage of positive polarity. When the magnitude of the current inner loop output duty ratio is negative, the current direction of the DC/DC converter can be set to 0, and the DC/DC converter can be controlled to output negative voltage.
For example, the current direction of the DC/DC converter at the previous sampling time is 1, the current direction of the DC/DC converter at the current sampling time is 0, or the current direction of the DC/DC converter at the previous sampling time is 0, and the current direction of the DC/DC converter at the current sampling time is 1, and in these cases, the current direction of the DC/DC converter at the current sampling time is not equal to the current direction of the DC/DC converter at the previous sampling time, and in S20, the DC/DC converter may be controlled to switch the polarity of the output voltage and maintain the polarity after the switching for a preset period of time.
In some embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 5. The points of fig. 5 that are the same as those of fig. 1 are not repeated, and the difference is that, as shown in fig. 5, the control method of the DC/DC converter provided in the embodiment of the present application may further include S31.
S31, determining whether the DC/DC converter switches the polarity of the output voltage at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset time is over.
In this embodiment of the present application, whether the switching requirement exists at each sampling time within the preset duration may not be monitored, and whether the polarity switching requirement exists in the DC/DC converter may be further determined after the preset duration is over.
For example, the current direction that the DC/DC converter needs to provide at the first sampling time after the preset duration is finished may be determined according to the current inner loop output duty ratio of the DC/DC converter at the first sampling time after the preset duration is finished; determining the current direction provided by the DC/DC converter at the last sampling time of the first sampling time according to the current inner loop output duty ratio of the DC/DC converter at the last sampling time of the first sampling time; if the two current directions are the same, determining that the polarity of the output voltage does not need to be switched at the first sampling moment of the DC/DC converter; if the two current directions are different, it is determined that the polarity of the output voltage needs to be switched at the first sampling time of the DC/DC converter.
In other embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 6. The points of fig. 6 that are the same as those of fig. 1 are not repeated, and the difference is that, as shown in fig. 6, the control method of the DC/DC converter provided in the embodiment of the present application may further include S32.
S32, if the DC/DC converter needs to switch the polarity of the output voltage back to the first polarity at each sampling time within the preset time, the DC/DC converter is controlled to switch the polarity of the output voltage back to the first polarity at the first sampling time after the preset time is over.
In the embodiment of the application, whether the switching requirement exists at each sampling time within the preset time period can be monitored, and if each sampling time within the preset time period needs to switch the polarity of the output voltage, the polarity of the output voltage of the Ma Qiehuan DC/DC converter is set up after the preset time period is ended.
As an example, if the polarity of the output voltage does not need to be switched back to the first polarity at least one sampling time within the preset duration, it is determined whether the polarity of the output voltage is switched by the DC/DC converter at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset duration is finished.
For example, for any sampling time within a preset duration, the current direction that the DC/DC converter needs to provide at the target sampling time can be determined according to the current inner loop output duty ratio of the DC/DC converter at the target sampling time; determining the current direction provided by the DC/DC converter at the last sampling time of the target sampling time according to the current inner loop output duty ratio of the DC/DC converter at the last sampling time of the target sampling time; if the two current directions are the same, determining that the DC/DC converter does not need to switch the polarity of the output voltage at the target sampling moment; if the two current directions are different, determining that the DC/DC converter needs to switch the polarity of the output voltage at the target sampling moment.
In some embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 7. The points of fig. 7 that are the same as those of fig. 1 are not repeated, and the difference is that, as shown in fig. 7, the control method of the DC/DC converter provided in the embodiment of the present application may further include S41.
S41, setting a first upper limit and a lower limit of a current inner loop output duty ratio of the DC/DC converter in a preset time period, wherein the numerical values in the first upper limit and the lower limit are used for indicating the DC/DC converter to output voltage with a second polarity from the current sampling time and continuously for the preset time period.
In the embodiment of the application, the upper limit and the lower limit of the current inner loop output duty ratio of the DC/DC converter in the preset time period are set, so that the DC/DC converter can be controlled to stably output voltage with one polarity in the preset time period, and the stability of the DC/DC converter can be further improved.
The current inner loop output duty cycle may be used to control the polarity and magnitude of the DC/DC converter output voltage. For example, when the magnitude of the current inner loop output duty ratio is positive, the current inner loop output duty ratio may be used to instruct the DC/DC converter to output a voltage of positive polarity. When the magnitude of the current inner loop output duty cycle is negative, the current inner loop output duty cycle can be used for indicating the DC/DC converter to output negative voltage.
For example, the second polarity is negative, and the values within the first upper and lower limits may both be negative, e.g., the first upper and lower limits may range from-0.003 to-0.997, i.e., the upper limit of the first upper and lower limits may be-0.003, and the lower limit may be-0.997, i.e., the actual value of the current inner loop output duty cycle may range from-0.003 to-0.997. It should be noted that this range includes-0.003 and-0.997.
For example, the second polarity is positive, and the values within the first upper and lower limits may be positive, for example, the first upper and lower limits may range from 0.003 to 0.997, i.e., the first upper and lower limits may have a lower limit of 0.003 and an upper limit of 0.997, i.e., the actual value of the current inner loop output duty cycle may range from 0.003 to 0.997. It should be noted that this range includes 0.003 and 0.997.
In some embodiments, the preset duration includes a first sampling time and a second sampling time, and the control method of the DC/DC converter provided in the embodiments of the present application may include steps as shown in fig. 8. The points of fig. 8 that are the same as those of fig. 7 are not repeated, and the difference is that, as shown in fig. 8, the control method of the DC/DC converter provided in the embodiment of the present application may further include S42.
And S42, if the voltage value required to be output by the DC/DC converter at the first sampling time is different from the voltage value required to be output by the DC/DC converter at the second sampling time, taking different values as actual values of the current inner loop output duty ratio of the DC/DC converter at the first sampling time and the second sampling time respectively in the first upper limit and the lower limit.
In the embodiment of the application, different values are taken as actual values of the current inner loop output duty ratio of the DC/DC converter corresponding to different sampling moments in a preset duration in the first upper limit and the lower limit, so that the actual values of the current inner loop output duty ratio of the DC/DC converter in different sampling moments in the preset duration can be adjusted according to actual requirements.
For example, if the current inner loop output duty ratio required by the DC/DC converter at the first sampling time is 0.500, a value close to or equal to 0.500 may be taken as the actual value of the current inner loop output duty ratio of the DC/DC converter at the first sampling time within the first upper and lower limits, that is, the actual value may be used to control the DC/DC converter at the first sampling time.
For another example, if the current inner loop output duty ratio required by the DC/DC converter at the second sampling time is 0.300, a value close to or equal to 0.300 may be taken as the actual value of the current inner loop output duty ratio of the DC/DC converter at the second sampling time within the first upper and lower limits, that is, the actual value may be used to control the DC/DC converter at the second sampling time.
In some embodiments, the preset duration includes a third sampling time, and the control method of the DC/DC converter provided in the embodiments of the present application may include steps as shown in fig. 9. The points of fig. 9 that are the same as those of fig. 7 are not repeated, and the difference is that, as shown in fig. 9, the control method of the DC/DC converter provided in the embodiment of the present application may further include S43.
And S43, if the voltage required to be output by the DC/DC converter at the third sampling time is of the first polarity, taking the lower limit value of the first upper limit and the lower limit value as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
In this embodiment of the present application, although the DC/DC converter is controlled to output the voltage of the second polarity all the time within the preset period, that is, the output voltage of the DC/DC converter is controlled not to switch the polarity within the preset period, when the requirement of the third sampling time is the first polarity, the lower limit value of the first upper limit and the lower limit value is used as the actual value of the output duty ratio of the current inner loop, so that the magnitude of the output voltage of the DC/DC converter at the third sampling time is closest to the first polarity, and in this way, the error can be reduced.
For example, the first polarity is positive, the second polarity is negative, the upper limit of the first upper limit and the lower limit is-0.003, the lower limit is-0.997, and the lower limit of-0.997 can be taken as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling moment.
For example, the first polarity is negative, the second polarity is positive, the lower limit of the first upper limit and the lower limit is 0.003, the upper limit is 0.997, and the lower limit of 0.003 is taken as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
In some embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 10. The points of fig. 10 that are the same as those of fig. 7 are not repeated, and the difference is that, as shown in fig. 10, the control method of the DC/DC converter provided in the embodiment of the present application may further include S44.
S44, setting a second upper limit and a second lower limit of the current inner loop output duty ratio of the DC/DC converter after the preset time period is ended, wherein a numerical value in the second upper limit and the numerical value in the second upper limit are used for indicating the DC/DC converter to output voltage of the first polarity or the second polarity after the preset time period is ended.
In the embodiment of the application, by setting the second upper and lower limits, it can be ensured that the polarity of the DC/DC converter can be switched after the preset duration is over.
For example, the values within the second upper and lower limits may include positive and negative numbers. For example, the second upper and lower limits may have a lower limit of-0.997 and an upper limit of 0.997, i.e., the actual value of the current inner loop output duty cycle may be in the range of-0.997 to 0.997. It should be noted that this range includes-0.997 and 0.997.
In order to better understand the first upper and lower limits and the second upper and lower limits, as an example, as shown in fig. 11, the first preset duration from the first switching point P11 to the first release point P12 is a first preset duration in which the polarity of the output voltage of the DC/DC converter needs to be controlled to be always negative. The second preset duration from the second switching point P21 to the second release point P22 is a second preset duration in which the polarity of the output voltage of the DC/DC converter is controlled to be positive all the time.
At the first switching point P11, the upper limit of the first upper and lower limits may be-0.003, and the lower limit of the first upper and lower limits may be-0.997.
At the second switching point P21, the upper limit of the first upper and lower limits may be 0.997, and the lower limit of the first upper and lower limits may be-0.003.
At the first release point P12, the upper limit of the first upper and lower limits may be 0.997, and the lower limit of the first upper and lower limits may be-0.997.
At the second release point P22, the upper limit of the first upper and lower limits may be 0.997, and the lower limit of the first upper and lower limits may be-0.997.
In some embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 12. Fig. 12 is the same as fig. 1 and is not repeated, except that, as shown in fig. 12, the control method of the DC/DC converter provided in the embodiment of the present application may further include S50.
S50, after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, indicating the integral corresponding to the current inner loop output duty ratio of the DC/DC converter to zero.
In the PID control, an error is calculated from the difference between the reference current and the actual current of the DC/DC converter, and the error is integrated. In the embodiment of the application, after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, the PID controller can be instructed to clear the integral, so that the integral can be ensured to be carried out in one direction, the condition that the integral is too large when the DC/DC converter is switched to the next direction is avoided, namely, the DC/DC converter with a larger amplitude current inner loop output duty ratio after the polarity is controlled to be switched is avoided, and the control precision can be improved.
It should be noted that a single direction may refer to a direction of a current of the DC/DC converter during a period of time, in other words, a single direction may refer to a polarity of a voltage output from the DC/DC converter during a period of time.
In addition, the PID controller may be instructed to perform normal integration during the unidirectional control period.
In some embodiments, the control method of the DC/DC converter provided in the embodiments of the present application may include the steps shown in fig. 13. Fig. 13 is the same as fig. 1 and is not repeated, except that, as shown in fig. 13, the control method of the DC/DC converter provided in the embodiment of the present application may further include S60.
S60, if the current direction needed to be provided by the DC/DC converter at the current sampling time is the same as the current direction provided by the DC/DC converter at the previous sampling time, controlling the DC/DC converter to output the voltage with the first polarity at the current sampling time.
In this embodiment of the present application, when the current direction that the DC/DC converter needs to provide at the current sampling time is the same as the current direction that the DC/DC converter provides at the previous sampling time, the DC/DC converter is controlled to continue to output the voltage of the first polarity at the current sampling time, so that the polarity of the output voltage is not switched any more.
As an example, as shown in fig. 14, the control method of the DC/DC converter provided in the embodiment of the present application may include S141 to S149.
And S141, judging the magnitude of the current inner loop output duty ratio, wherein the current inner loop output duty ratio is positive, the polarity of the output voltage of the DC/DC converter is positive, and the current inner loop output duty ratio is negative, the polarity of the output voltage of the DC/DC converter is negative.
In S141, the magnitude of the current inner loop output duty cycle at the current sampling time and the magnitude of the current inner loop output duty cycle at the previous sampling time may be determined.
S142, setting a current sampling time control direction and a previous sampling time control direction. The direction refers to the current direction of the DC/DC converter. The current inner loop output duty ratio is positive, the polarity of the output voltage of the DC/DC converter is positive, and the current direction of the DC/DC converter can be set to be 1. The output duty ratio of the current inner loop is negative, the polarity of the output voltage of the DC/DC converter is negative, and the current direction of the DC/DC converter can be set to 0.
S143, judging whether the current direction at the current sampling time is equal to the current direction at the previous sampling time. At this time, the delay flag bit may be set to 0.
If the judgment result of S143 is that the current direction at the current sampling time is not equal to the current direction at the previous sampling time, S144 is executed; if the current direction at the current sampling time is equal to the current direction at the previous sampling time as a result of the determination at S143, S145 is performed.
S144, the control direction tubular state is switched. For example, in fig. 3, the upper switching transistor Q5 and the lower switching transistor Q6 are directional transistors in the DC/DC converter 10, and in the previous sampling time, the upper switching transistor Q5 is turned off and the lower switching transistor Q6 is turned on, and in S144, the upper switching transistor Q5 is switched from off to on and the lower switching transistor Q6 is switched from on to off in the DC/DC converter.
S145, controlling the state of the directional pipe not to be switched. Still taking the example that the upper switching tube Q5 is turned off and the lower switching tube Q6 is turned on at the previous sampling time, in S145, the upper switching tube Q5 and the lower switching tube Q6 in the DC/DC converter can be controlled to keep being turned off and turned on.
S146, setting a delay lock. For example, the delay time is 5ms, i.e., the state of the directional pipe after switching in S144 is locked for 5ms.
S147, it is determined whether the delay time has arrived.
If the judgment result of S147 is yes (delay time arrives), S148 is executed; if the determination result of S147 is no (the delay time does not arrive), S149 is executed.
S148, setting the delay time flag bit to be 1. The delay flag bit changes from 0 to 1, indicating that the delay is over.
S149, the set delay time flag bit is still 0. The delay flag bit is 0, which indicates that the delay is not completed, and the delay is continued, that is, the state of the directional pipe switched in S144 is continued to be locked.
Based on the same inventive concept, the embodiment of the application also provides a battery system. As shown in fig. 2, the battery system 100 may include a controller 20, a plurality of battery clusters 30 connected in parallel, and a DC/DC converter 10 connected to the battery clusters 30. The controller 20 is connected to the DC/DC converter 10.
A controller 20, configured to obtain a current direction that the DC/DC converter needs to provide at a current sampling time and a current direction that the DC/DC converter provides at a previous sampling time, where the DC/DC converter outputs a voltage of a first polarity at the previous sampling time;
if the current direction which is required to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the polarity of the output voltage of the DC/DC converter is controlled to be switched from the first polarity to the second polarity, the second polarity is controlled to be maintained within a preset time period from the current sampling time, and the preset time period is longer than the interval time period between the current sampling time and the previous sampling time.
According to the battery system provided by the embodiment of the application, when the current direction which is needed to be provided by the DC/DC converter at the current sampling time is different from the current direction which is provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to switch the polarity of the output voltage, and the polarity after switching is maintained within the preset duration. Therefore, compared with the condition that the polarity of the output voltage of the DC/DC converter is locked within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being switched again within the preset time, namely the state of the directional tube in the DC/DC converter is prevented from being switched again within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being frequently switched, the problem that the state of the directional tube in the DC/DC converter is frequently switched is solved, and the stability of the DC/DC converter is improved.
The battery system disclosed in the embodiments of the present application may be used in, but not limited to, electric devices such as vehicles, ships, or aircrafts, and is not limited to use in charging apparatuses for various electric devices.
In embodiments of the present application, each battery cluster 30 may include a plurality of batteries connected in series. Batteries include, but are not limited to, lithium ion batteries, lithium metal batteries, lead acid batteries, nickel-metal hydride batteries, lithium sulfur batteries, lithium air batteries, or sodium ion batteries, without limitation. The battery may be a single cell, a battery module or a battery pack, and is not limited herein.
The circuit structure of the DC/DC converter 10 in the battery system disclosed in the embodiment of the present application may include, but is not limited to, the circuit structure of the DC/DC converter as shown in fig. 3.
For example, the controller 20 may be a chip or circuit that performs the relevant actions in accordance with the characteristic instructions. For example, the controller 20 may be a micro-control unit (Microcontroller Unit, MCU), but also a digital signal controller (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific-Integrated Circuit, ASIC), a Field-programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. For another example, the controller 20 may include an external clock, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), and the like. The specific structure of the controller 20 is not limited in this application.
In some embodiments, the controller 20 may be configured to:
acquiring the current inner loop output duty ratio of the DC/DC converter at the current sampling time and the current inner loop output duty ratio of the DC/DC converter at the previous sampling time;
determining the current direction which the DC/DC converter needs to provide at the current sampling moment according to the current inner loop output duty ratio of the DC/DC converter at the current sampling moment; and determining the current direction provided by the DC/DC converter at the previous sampling time according to the current inner loop output duty ratio of the DC/DC converter at the previous sampling time.
In some embodiments, the controller 20 may also be configured to:
and determining whether the DC/DC converter switches the polarity of the output voltage at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset time is over.
In some embodiments, the controller 20 may also be configured to:
if the DC/DC converter needs to switch the polarity of the output voltage back to the first polarity at each sampling time within the preset time, the DC/DC converter is controlled to switch the polarity of the output voltage back to the first polarity at the first sampling time after the preset time is over.
In some embodiments, the controller 20 may also be configured to:
Setting a first upper limit and a lower limit of a current inner loop output duty ratio of the DC/DC converter in a preset time period, wherein the numerical values in the first upper limit and the lower limit are used for indicating the DC/DC converter to output voltage with a second polarity from the current sampling time and continuously for the preset time period.
In some embodiments, the preset duration includes a first sampling time and a second sampling time, and the controller 20 is further configured to:
if the voltage value required to be output by the DC/DC converter at the first sampling time is different from the voltage value required to be output by the DC/DC converter at the second sampling time, taking different values in the first upper limit and the lower limit as actual values of the current inner loop output duty ratio of the DC/DC converter at the first sampling time and the second sampling time respectively.
In some embodiments, the preset time period includes a third sampling time, and the controller 20 is further configured to:
and if the voltage required to be output by the DC/DC converter at the third sampling time is of the first polarity, taking the lower limit value of the first upper limit and the lower limit value as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
In some embodiments, the controller 20 may also be configured to:
after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, indicating the integral corresponding to the current inner loop output duty ratio of the DC/DC converter to zero.
In some embodiments, the controller 20 may also be configured to:
setting a second upper limit and a second lower limit of the current inner loop output duty ratio of the DC/DC converter after the preset duration is over, wherein a numerical value in the second upper limit and the numerical value in the second lower limit are used for indicating the DC/DC converter to output voltage of a first polarity or a second polarity after the preset duration is over.
In some embodiments, the controller 20 may also be configured to:
and if the current direction which is required to be provided by the DC/DC converter at the current sampling time is the same as the current direction which is provided by the DC/DC converter at the previous sampling time, controlling the DC/DC converter to output the voltage with the first polarity at the current sampling time.
Illustratively, as shown in fig. 2, the multi-cluster battery clusters are connected in parallel and connected to a DC/AC (Direct Current/Alternating Current) converter at the output, or to a PCS (Power Conversion System) or load at the output.
For example, as shown in fig. 2, the battery system 100 may further include a first switch K1, a second switch K2, a third switch K3, and a first resistor R1. One end of each of the battery clusters 30 is connected to the second bus bar 32 through a first switch, respectively. The second switch K2 and the first resistor R1 are connected in series and then connected in parallel with the third switch K3 to the third node N3 and the other end of the battery cluster 30.
For example, the first bus bar 31 may serve as a positive bus bar and the second bus bar 32 may serve as a negative bus bar.
For example, in the case of pre-charging the battery cluster 30, the first switch K1, the second switch K2 may be controlled to be turned on, and the third switch K3 may be controlled to be turned off. After the pre-charging is finished, the first switch K1 and the third switch K3 can be controlled to be turned on, and the second switch K2 is controlled to be turned off.
Based on the same inventive concept, the embodiment of the application also provides a control device of the DC/DC converter. As shown in fig. 15, the control apparatus 1500 of the DC/DC converter may include a data acquisition module 1501 and a control module 1502.
A data acquisition module 1501, configured to acquire a current direction that the DC/DC converter needs to provide at a current sampling time and a current direction that the DC/DC converter provides at a previous sampling time, where the DC/DC converter outputs a voltage of a first polarity at the previous sampling time;
the control module 1502 is configured to control the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity if the current direction that the DC/DC converter needs to provide at the current sampling time is different from the current direction that the DC/DC converter provides at the previous sampling time, and control the DC/DC converter to maintain the second polarity within a preset period of time from the current sampling time, where the preset period of time is longer than the interval period between the current sampling time and the previous sampling time.
According to the control device for the DC/DC converter, when the current direction required to be provided by the DC/DC converter at the current sampling time is different from the current direction provided by the DC/DC converter at the previous sampling time, the DC/DC converter is controlled to switch the polarity of the output voltage, and the polarity after switching is maintained within the preset duration. Therefore, compared with the condition that the polarity of the output voltage of the DC/DC converter is locked within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being switched again within the preset time, namely the state of the directional tube in the DC/DC converter is prevented from being switched again within the preset time, the polarity of the output voltage of the DC/DC converter is prevented from being frequently switched, the problem that the state of the directional tube in the DC/DC converter is frequently switched is solved, and the stability of the DC/DC converter is improved.
In some embodiments, data acquisition module 1501 may be configured to:
acquiring the current inner loop output duty ratio of the DC/DC converter at the current sampling time and the current inner loop output duty ratio of the DC/DC converter at the previous sampling time;
determining the current direction which the DC/DC converter needs to provide at the current sampling moment according to the current inner loop output duty ratio of the DC/DC converter at the current sampling moment; and determining the current direction provided by the DC/DC converter at the previous sampling time according to the current inner loop output duty ratio of the DC/DC converter at the previous sampling time.
In some embodiments, control module 1502 may also be used to:
and determining whether the DC/DC converter switches the polarity of the output voltage at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset time is over.
In some embodiments, control module 1502 may also be used to:
if the DC/DC converter needs to switch the polarity of the output voltage back to the first polarity at each sampling time within the preset time, the DC/DC converter is controlled to switch the polarity of the output voltage back to the first polarity at the first sampling time after the preset time is over.
In some embodiments, control module 1502 may also be used to:
setting a first upper limit and a lower limit of a current inner loop output duty ratio of the DC/DC converter in a preset time period, wherein the numerical values in the first upper limit and the lower limit are used for indicating the DC/DC converter to output voltage with a second polarity from the current sampling time and continuously for the preset time period.
In some embodiments, the preset duration includes a first sampling time and a second sampling time, and the controller 20 is further configured to:
if the voltage value required to be output by the DC/DC converter at the first sampling time is different from the voltage value required to be output by the DC/DC converter at the second sampling time, taking different values in the first upper limit and the lower limit as actual values of the current inner loop output duty ratio of the DC/DC converter at the first sampling time and the second sampling time respectively.
In some embodiments, the preset time period includes a third sampling time, and the control module 1502 is further configured to:
and if the voltage required to be output by the DC/DC converter at the third sampling time is of the first polarity, taking the lower limit value of the first upper limit and the lower limit value as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
In some embodiments, control module 1502 may also be used to:
after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, indicating the integral corresponding to the current inner loop output duty ratio of the DC/DC converter to zero.
In some embodiments, control module 1502 may also be used to:
setting a second upper limit and a second lower limit of the current inner loop output duty ratio of the DC/DC converter after the preset duration is over, wherein a numerical value in the second upper limit and the numerical value in the second lower limit are used for indicating the DC/DC converter to output voltage of a first polarity or a second polarity after the preset duration is over.
In some embodiments, control module 1502 may also be used to:
and if the current direction which is required to be provided by the DC/DC converter at the current sampling time is the same as the current direction which is provided by the DC/DC converter at the previous sampling time, controlling the DC/DC converter to output the voltage with the first polarity at the current sampling time.
For specific limitations on the control device of the DC/DC converter, reference may be made to the above limitations on the control method of the DC/DC converter, and no further description is given here. The respective modules in the control device of the DC/DC converter described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the electronic device, or may be stored in software in a memory in the electronic device, so that the processor may call and execute operations corresponding to the above modules.
Based on the same inventive concept, the embodiment of the application also provides electronic equipment.
Fig. 16 shows a schematic hardware structure of an electronic device according to an embodiment of the present application.
A processor 1601 may be included in an electronic device, as well as a memory 1602 storing computer program instructions.
In particular, the processor 1601 may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits that implement embodiments of the present invention.
Memory 1602 may include mass storage for data or instructions. By way of example, and not limitation, memory 1602 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the above. Memory 1602 may include removable or non-removable (or fixed) media where appropriate. Memory 1602 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 1602 is a non-volatile solid-state memory.
In particular embodiments, memory 1602 includes Read Only Memory (ROM). The ROM may be mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these, where appropriate. By way of example, the memory may include non-volatile transient memory.
The processor 1601 implements the control method of any of the DC/DC converters of the above embodiments by reading and executing computer program instructions stored in the memory 1602.
In one example, the electronic device may also include a communication interface 1603 and a bus 1610. As shown in fig. 16, the processor 1601, the memory 1602, and the communication interface 1603 are connected to each other via a bus 1610, and perform communication with each other.
The communication interface 1603 is mainly used for implementing communication between each module, device, unit and/or apparatus in the embodiment of the invention.
Bus 1610 includes hardware, software, or both that couples the components of the electronic device to one another. By way of example, and not limitation, the buses may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a micro channel architecture (MCa) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus, or a combination of two or more of the above. Bus 1610 may include one or more buses, where appropriate. Although embodiments of the invention have been described and illustrated with respect to a particular bus, the invention contemplates any suitable bus or interconnect.
By way of example, the electronic device may be a cell phone, tablet computer, notebook computer, palm top computer, vehicle mounted electronic device, ultra-mobile personal computer (UMPC), netbook or personal digital assistant (personal digital assistant, PDA), or the like.
The electronic apparatus may perform the control method of the DC/DC converter in the embodiment of the present application, thereby implementing the control method of the DC/DC converter and the control device of the DC/DC converter described in connection with fig. 1 and 15.
The embodiment of the present application further provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor can implement the control method of the DC/DC converter in the foregoing embodiment, and achieve the same technical effects, so that repetition is avoided, and no further description is given here. The computer readable storage medium may include, but is not limited to, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic or optical disk.
According to some embodiments of the present application, there is also provided a computer program product, which, when being executed by a processor, can implement the above-mentioned method. The computer program product includes one or more computer instructions. When loaded and executed on a computer, these computer instructions may implement some or all of the methods described above, in whole or in part, in accordance with the processes or functions described in embodiments of the present disclosure.
The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. "computer-readable medium" may include any medium capable of storing or transmitting information. Examples of a computer readable medium include an electronic circuit, a semiconductor memory device, a ROM, a flash memory, an Erasable ROM (EROM), a floppy disk, a CD-ROM, an optical disk, a hard disk, a fiber optic medium, a radio frequency link, and so forth. The code segments may be downloaded via computer networks such as the internet, intranets, etc.
According to embodiments of the present application, the computer-readable storage medium may be a non-transitory computer-readable storage medium.
In the embodiments shown in the above figures, the resistor is represented by a single resistor, and the capacitor is represented by a single capacitor. In other embodiments, the resistor may be an integration of series, parallel or series-parallel resistors, and the capacitor may be an integration of series, parallel or series-parallel capacitors. Specific parameters of each device can be set according to actual requirements, and the application is not limited to the specific parameters.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be different from the order in the embodiments, or several steps may be performed simultaneously.
Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to being, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware which performs the specified functions or acts, or combinations of special purpose hardware and computer instructions.
These embodiments are not all details described in detail in accordance with the embodiments described hereinabove, nor are they intended to limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. This application is to be limited only by the claims and the full scope and equivalents thereof.

Claims (14)

1. A control method of a DC/DC converter, the DC/DC converter including a switching tube for controlling a polarity of an output voltage, the method comprising:
acquiring a current direction which is required to be provided by the DC/DC converter at the current sampling time and a current direction which is provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time;
if the current direction required to be provided by the DC/DC converter at the current sampling time is different from the current direction provided by the DC/DC converter at the previous sampling time, controlling the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity, and controlling the DC/DC converter to maintain the second polarity within a preset time period from the current sampling time, wherein the preset time period is longer than the interval time period between the current sampling time and the previous sampling time.
2. The method according to claim 1, wherein the obtaining the current direction that the DC/DC converter needs to provide at the present sampling instant and the current direction that the DC/DC converter provided at the previous sampling instant comprises:
acquiring the current inner loop output duty ratio of the DC/DC converter at the current sampling time and the current inner loop output duty ratio of the DC/DC converter at the previous sampling time;
determining the current direction which the DC/DC converter needs to provide at the current sampling moment according to the current inner loop output duty ratio of the DC/DC converter at the current sampling moment; and determining the current direction provided by the DC/DC converter at the previous sampling time according to the current inner loop output duty ratio of the DC/DC converter at the previous sampling time.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
and determining whether the DC/DC converter switches the polarity of the output voltage at the first sampling time according to the polarity switching requirement of the DC/DC converter at the first sampling time after the preset duration is finished.
4. The method according to claim 1 or 2, characterized in that the method further comprises:
If the DC/DC converter needs to switch the polarity of the output voltage back to the first polarity at each sampling time within the preset time, the DC/DC converter is controlled to switch the polarity of the output voltage back to the first polarity at the first sampling time after the preset time is over.
5. The method according to claim 1 or 2, characterized in that the method further comprises:
setting a first upper limit and a lower limit of a current inner loop output duty ratio of the DC/DC converter in the preset time period, wherein the numerical values in the first upper limit and the lower limit are used for indicating the DC/DC converter to output voltage with a second polarity from the current sampling time and in the preset time period.
6. The method of claim 5, wherein the predetermined time period includes a first sampling time and a second sampling time, the method further comprising:
and if the voltage value required to be output by the DC/DC converter at the first sampling time is different from the voltage value required to be output by the DC/DC converter at the second sampling time, taking different values as actual values of the current inner loop output duty ratio of the DC/DC converter at the first sampling time and the second sampling time respectively in the first upper limit and the lower limit.
7. The method of claim 5, wherein the predetermined period of time includes a third sampling instant, the method further comprising:
and if the voltage required to be output by the DC/DC converter at the third sampling time is of the first polarity, taking the lower limit value of the first upper limit and the lower limit value as the actual value of the current inner loop output duty ratio of the DC/DC converter at the third sampling time.
8. The method according to claim 1 or 2, characterized in that the method further comprises:
and after the voltage output by the DC/DC converter is switched from one polarity to the other polarity, indicating the integral corresponding to the current inner loop output duty ratio of the DC/DC converter to zero.
9. The method according to claim 1 or 2, characterized in that the method further comprises:
setting a second upper limit and a second lower limit of the current inner loop output duty ratio of the DC/DC converter after the preset duration is over, wherein a numerical value in the second upper limit and the numerical value in the second lower limit are used for indicating the DC/DC converter to output voltage of a first polarity or a second polarity after the preset duration is over.
10. The method according to claim 1 or 2, characterized in that the method further comprises:
And if the current direction which is required to be provided by the DC/DC converter at the current sampling time is the same as the current direction which is provided by the DC/DC converter at the previous sampling time, controlling the DC/DC converter to output the voltage with the first polarity at the current sampling time.
11. A battery system, characterized in that the battery system comprises a controller, a plurality of battery clusters connected in parallel and a DC/DC converter connected with the battery clusters, and the controller is connected with the DC/DC converter, and the DC/DC converter comprises a switching tube for controlling the polarity of an output voltage;
the controller is configured to obtain a current direction that the DC/DC converter needs to provide at a current sampling time and a current direction that the DC/DC converter provides at a previous sampling time, where the DC/DC converter outputs a voltage of a first polarity at the previous sampling time;
if the current direction required to be provided by the DC/DC converter at the current sampling time is different from the current direction provided by the DC/DC converter at the previous sampling time, controlling the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity, and controlling the DC/DC converter to maintain the second polarity within a preset time period from the current sampling time, wherein the preset time period is longer than the interval time period between the current sampling time and the previous sampling time.
12. A control device of a DC/DC converter, the DC/DC converter including a switching tube for controlling a polarity of an output voltage, the device comprising:
the data acquisition module is used for acquiring a current direction which is required to be provided by the DC/DC converter at the current sampling time and a current direction which is provided by the DC/DC converter at the previous sampling time, wherein the DC/DC converter outputs voltage of a first polarity at the previous sampling time;
and the control module is used for controlling the polarity of the output voltage of the DC/DC converter to be switched from the first polarity to the second polarity if the current direction required to be provided by the DC/DC converter at the current sampling moment is different from the current direction provided by the DC/DC converter at the previous sampling moment, and controlling the DC/DC converter to maintain the second polarity within a preset duration from the current sampling moment, wherein the preset duration is longer than the interval duration between the current sampling moment and the previous sampling moment.
13. An electronic device, comprising: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a method of controlling a DC/DC converter as claimed in any one of claims 1 to 10.
14. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement a method of controlling a DC/DC converter according to any of claims 1 to 10.
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