CN114094818B - Integrated electronic transformer of direct current converter for automobile charging - Google Patents
Integrated electronic transformer of direct current converter for automobile charging Download PDFInfo
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- CN114094818B CN114094818B CN202111436438.0A CN202111436438A CN114094818B CN 114094818 B CN114094818 B CN 114094818B CN 202111436438 A CN202111436438 A CN 202111436438A CN 114094818 B CN114094818 B CN 114094818B
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
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- H02J7/40—
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- 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
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
- H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
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Abstract
本发明涉及一种用于汽车充电的直流转换器集成电子变压器，包括：充电单元，其用于向蓄电单元进行充电；变压器单元，其与充电单元相连接，用于将充电单元向蓄电单元充的电能进行传输；蓄电单元，用于储存电能，蓄电单元包括若干蓄能机构，用于将电能进行分别储存，中控单元判定充电单元对蓄电单元进行充电时，中控单元对各蓄能机构进行循环充电；中控单元，其包括自学习机构，根据历史充电时各预设循环周期蓄电单元总电量值获取各循环周期各蓄电机构蓄电量，中控单元根据获取的蓄能单元的电量变化稳定度对充电单元和蓄电单元各参数进行调节，以使汽车充电时电量保持稳定。
The invention relates to a DC converter integrated electronic transformer for vehicle charging, comprising: a charging unit for charging a power storage unit; a transformer unit connected with the charging unit for charging the charging unit to the power storage unit The electric energy charged by the unit is transmitted; the electric storage unit is used to store electric energy, and the electric storage unit includes several energy storage mechanisms, which are used to store the electric energy respectively. When the central control unit determines that the charging unit is charging the electric storage unit, the central control unit Cyclic charging is performed on each energy storage mechanism; the central control unit, which includes a self-learning mechanism, obtains the power storage capacity of each power storage mechanism in each cycle according to the total power value of the power storage units in each preset cycle during historical charging, and the central control unit obtains The power change stability of the power storage unit adjusts the parameters of the charging unit and the power storage unit to keep the power stable when the car is charging.
Description
Technical Field
The invention relates to the field of automobile charging, in particular to a direct-current converter integrated electronic transformer for automobile charging.
Background
The electric automobile uses the vehicle-mounted power supply as power, because the influence on the environment is smaller than that of the traditional automobile, the prospect is widely seen, the automobile charging needs to use a direct current converter, the direct current converter is a circuit for converting electric energy or electromechanical equipment, the direct current power supply can be converted into direct current power supplies with different voltages, a transformer has an electronic device which converts alternating voltage of commercial power into direct current and then forms high-frequency alternating current voltage output through a semiconductor switching device, an electronic element and a high-frequency transformer winding, and is also an alternating current-direct current-alternating current inversion circuit taught in the theory of electronics, in the automobile charging process, because the energy stored by the unit weight of a storage battery is too small, the treatment of a scrapped battery also serves as a key problem to be solved and also becomes a reason for the cost of the electric automobile, so how to effectively utilize the battery of the electric automobile, by prolonging the service life of the electric power storage equipment, the research work of automobile charging at the present stage is important.
Disclosure of Invention
Therefore, the invention provides a direct current converter integrated electronic transformer for automobile charging, which can solve the technical problem that the stored electric quantity of each electric storage mechanism cannot be adjusted according to the variation condition of electric quantity in the automobile charging process so as to keep the automobile charging stable.
To achieve the above object, the present invention provides a dc converter integrated electronic transformer for charging a vehicle, comprising:
a charging unit for charging the electric storage unit;
the transformer unit is connected with the charging unit and is used for transmitting the electric energy charged to the electric storage unit by the charging unit;
the electric power storage unit is used for storing electric energy and comprises a plurality of electric power storage mechanisms used for respectively storing the electric energy, the central control unit is used for circularly charging each electric power storage mechanism when the charging unit is used for charging the electric power storage unit, the charging unit is used for charging the next electric power storage mechanism after the electric quantity of the current electric power storage mechanism is charged to the electric quantity tj of each electric power storage mechanism in the jth cycle period, so that the electric power storage mechanism is charged in n cycle periods until the electric quantity of each electric power storage mechanism is full, namely, the electric power storage mechanism is charged once, wherein j =1,2.. n, n is the total cycle number of each charging, and n is a natural number which is more than or equal to 2;
the central control unit comprises a self-learning mechanism, acquires the storage capacity of each storage mechanism in each cycle period according to the total electric quantity value of the storage unit in each preset cycle period during historical charging, is connected with the charging unit and the storage unit, and is used for adjusting each parameter of the charging unit and the storage unit according to the acquired stability of the charging electric quantity of the storage unit during charging of the automobile;
When the central control unit judges that the charging unit charges the electric storage unit, the central control unit sends the data of the electric quantity value of each cycle period in each charging of the electric storage unit in historical charging to the self-learning mechanism, and the self-learning mechanism sends the electric quantity value of the electric storage unit in each cycle period in each charging according to the historical chargingCalculating the storage capacity tj of each storage mechanism in each cycle, wherein tj = (T1j × yp1 × h1+ T2j × yp2 × h2+ · · + Tmj × ypm × hm)/(m × h0), wherein yp1 is a first-time charging-time storage unit temperature adjustment parameter, yp2 is a second-time charging-time storage unit temperature adjustment parameter, · · ypm is an mth-time charging-time storage unit temperature adjustment parameter, h1 is a first-time charging-time storage unit loss, h2 is a second-time charging-time storage unit loss · · hm · an mth-time storage unit loss, h0 is a self-learning-mechanism preset storage unit loss standard value, each preset cycle period storage unit total storage unit electric quantity value T1 in the first charging-time, a first-cycle storage unit total electric quantity value T638 in the first charging-time, a second-time storage unit total storage unit electric quantity value T12 · a first-time cycle charging-time, and a first-cycle storage unit total storage unit electric quantity value T12 · n · total storage unit charging-time, the total electric quantity value T2 of each cycle period of the electric storage unit during the second charging, the total electric quantity value T21 of the electric storage unit during the first cycle period during the second charging, the total electric quantity value T22. the total electric quantity value T2n,. the total electric quantity Tm of the electric storage unit during the second charging, the first cycle period of the electric storage unit during the mth charging, the total electric quantity value Tm1 of the electric storage unit during the mth charging, the total electric quantity value Tm 2. the total electric quantity value Tmn of the electric storage unit during the mth charging, the stability d of the electric storage unit during the ith charging, and d = ((Ti 1-0)) 2 +（Ti2-Ti0） 2 +··· +（Tin-Ti0） 2 ) And/n, wherein Ti0= (Ti1+ Ti2 +. cndot. + Tin)/n, the central control unit acquires that the stability of the charging electric quantity of the last charging electric storage unit is greater than a preset value when the electric storage unit is charged last time, and determines to adjust the calculated electric storage quantity tj of each electric storage mechanism, meanwhile, the central control unit acquires that the change rate of the charging electric quantity of each electric storage mechanism is smaller than the preset value when the charging unit charges the electric storage unit, the central control unit determines to reduce the electric storage quantity tj of the electric storage mechanism, the central control unit acquires that the change rate of the charging electric quantity of each electric storage mechanism is greater than the preset value when the charging unit charges the electric storage unit, and the central control unit determines to increase the electric storage quantity tj of the electric storage mechanism to enable the electric storage mechanism to chargeThe charging of the automobile is kept stable.
Further, the self-learning mechanism selects the loss of the accumulator unit during the ith charging according to the comparison between the charging frequency and the preset charging frequency, wherein,
when i is less than or equal to C1, the self-learning mechanism selects a first preset accumulator loss H1 as the accumulator loss hi during the charging;
when the i is more than C1 and less than or equal to C2, the self-learning mechanism selects a second preset accumulator loss H2 as the accumulator loss hi during the charging;
when the i is more than C2 and less than or equal to C3, the self-learning mechanism selects a third preset accumulator loss H3 as the accumulator loss hi during the charging;
When i is larger than C3, the self-learning mechanism selects a fourth preset accumulator loss H4 as the accumulator loss hi during the charging;
the self-learning mechanism is provided with an electricity storage unit loss H, a first preset electricity storage unit loss H1, a second preset electricity storage unit loss H2, a third preset electricity storage unit loss H3 and a fourth preset electricity storage unit loss H4, a preset charging frequency C, a first preset charging frequency C1, a second preset charging frequency C2 and a third preset charging frequency C3, wherein i =1,2 · · · m.
Further, the self-learning mechanism obtains the temperature w of the accumulator unit during the ith charging and compares the temperature w with a preset temperature, and selects an accumulator unit temperature adjusting parameter, wherein,
when W is less than or equal to W1, the self-learning mechanism selects a first preset temperature adjusting parameter y1 as a storage unit temperature adjusting parameter ypi;
when W1 is larger than W and smaller than W2, the self-learning mechanism selects a second preset temperature adjusting parameter y2 as a storage unit temperature adjusting parameter ypi;
when W is larger than or equal to W2, the self-learning mechanism selects a third preset temperature adjusting parameter y3 as a storage unit temperature adjusting parameter ypi;
the self-learning mechanism is used for presetting a temperature W, setting a first preset temperature W1 and a second preset temperature W2, the self-learning mechanism is used for presetting a temperature adjusting parameter y, and setting a first preset temperature adjusting parameter y1, a second preset temperature adjusting parameter y2 and a third preset temperature adjusting parameter y 3.
Further, the self-learning mechanism adjusts the selected storage unit temperature adjustment parameter based on a comparison of the selected storage unit loss hi with a preset storage unit loss criterion value, wherein,
when hi is less than or equal to h0, the self-learning mechanism reduces the selected power storage unit temperature adjusting parameter ypi to ypi1, and sets ypi1= ypi × (1- (h 0-hi)/h 0);
when hi is greater than h0, the self-learning mechanism raises the selected storage unit temperature adjustment parameter ypi to ypi2, and sets ypi2= ypi × (1 + (hi-h 0)/h 0).
Further, the central control unit adjusts the storage capacity tj of each storage mechanism in the j-th cycle according to the acquired storage unit charging capacity stability D and the preset charging capacity stability D in the last charging, wherein,
when D is less than or equal to D1, the central control unit does not adjust the acquired storage capacity tj of each storage mechanism in the j-th cycle;
when D1 < D < D2, the central control unit reduces the storage capacity tj of each storage mechanism in the j-th cycle to tj1;
when D is larger than or equal to D2, the central control unit reduces the storage capacity tj of each storage mechanism in the ith cycle to tj2;
the central control unit presets a charging capacity stability degree D, sets a first preset charging capacity stability degree D1 and a second preset charging capacity stability degree D2.
Further, the center control unit obtains the power storage unit charging amount stability D between a first preset charging amount stability D1 and a second preset charging amount stability D2 when the last charging is performed, and the center control unit lowers each power storage mechanism power storage amount tj of the j-th cycle period to tj1, setting tj1= tj x (1- (D-D1) x (D2-D)/(D1 x D2)).
Further, when the central control unit obtains the last charging time, the charging electric quantity stability D of the electric storage unit is greater than or equal to a second preset charging electric quantity stability D2, and the central control unit stores the electric storage mechanisms in the j-th cycleThe charge tj is reduced to tj2, setting tj2= tj x (1- (D-D2) 2 /D2）。
Further, the power storage unit comprises a plurality of power storage mechanisms, wherein a first power storage mechanism real-time electric quantity a1, a second power storage mechanism real-time electric quantity a2 · R-th power storage mechanism real-time electric quantity aR, the central control unit calculates an R-th power storage mechanism charging electric quantity change rate b within a unit time, and sets b =Δar/w, wherein Δ aR is an R-th power storage mechanism real-time electric quantity change value within a preset time w, the central control unit adjusts the power storage quantity tjf of the R-th power storage mechanism in a j-th cycle period according to comparison between the R-th power storage mechanism charging electric quantity change rate and the preset charging electric quantity change rate within the unit time,
When B ≦ B1, the central control unit determines to decrease the stored electricity amount tjf of the r-th electricity storage mechanism for the j-th cycle period to tjf1, setting tjf1= tjf × (1- (B1-B)/B1);
when B1 < B2, the central control unit determines not to adjust the storage amount tjf of the jth cycle of the r-th storage mechanism;
when B is larger than or equal to B2, the central control unit judges that the storage capacity tjf of the jth cycle of the r-th storage mechanism is increased to tjf2, and sets tjf2= tjf x (1+ (B-B2)/B2);
the central control unit presets a charging electric quantity change rate B, sets a first preset charging electric quantity change rate B1, and sets a second preset charging electric quantity change rate B2, f =1,2, R =1,2.
Compared with the prior art, the invention has the advantages that the central control unit is arranged, when the central control unit judges that the charging unit charges the electric storage unit, the central control unit sends the electric quantity value data of each preset time of the electric storage unit during historical charging to the self-learning mechanism, the self-learning mechanism acquires the electric quantity value of each electric storage mechanism during the preset time according to the electric quantity value of the electric storage unit during the historical charging, the central control unit acquires the charging electric quantity stability of the electric storage unit during last charging, the central control unit acquires that the charging electric quantity stability of the electric storage unit during last charging is greater than the preset value, the acquired electric storage quantity of each electric storage mechanism is judged to be adjusted, meanwhile, the central control unit acquires that the charging electric quantity change rate of each electric storage mechanism during charging of the electric storage unit by the charging unit is less than the preset value, and the central control unit judges to reduce the electric storage quantity of the electric storage mechanism, the central control unit obtains that the change rate of the charging electric quantity of each electric storage mechanism is larger than a preset value when the charging unit charges the electric storage units, and the central control unit judges that the electric storage quantity of the electric storage mechanism is increased so as to keep the charging of the automobile stable.
In particular, the invention discloses a self-learning mechanism which acquires the electric storage capacity of each electric storage mechanism in each cycle period according to the total electric quantity value of the electric storage unit in each preset cycle period, the loss of the charged electric storage unit and a temperature regulation parameter during historical charging so as to accurately acquire the electric storage capacity of each electric storage mechanism in each cycle period, wherein the acquisition of the loss of the electric storage unit, the acquisition of the important parameter of the electric storage capacity of each electric storage mechanism in each cycle period according to the charging times, the charging times are less than a first preset charging time, the self-learning mechanism selects smaller electric storage unit loss, the charging times are between the first preset charging time and a second preset charging time, the self-learning mechanism selects electric storage unit loss with an intermediate value, the charging times are more than the second preset charging time, the self-learning mechanism selects larger electric storage unit loss so as to ensure the accurate electric storage capacity of each electric storage mechanism in each cycle period, meanwhile, in order to more accurately acquire the storage capacity of each cycle of each power storage mechanism, the self-learning mechanism sets a temperature adjusting parameter, when the self-learning mechanism acquires the charging in the ith period, the temperature of the power storage unit is compared with a preset value, and the temperature adjusting parameter is selected to compensate the storage capacity of each cycle of the power storage mechanism, wherein the temperature of the power storage unit is lower than a first preset temperature, which indicates that the current temperature of the power storage unit is lower than a standard value, the self-learning mechanism selects a higher temperature adjusting parameter, which prevents the problem that the power storage capacity of the power storage mechanism is poor due to too low temperature, so that the power storage capacity is insufficient, the temperature of the power storage unit is between the first preset temperature and a second preset temperature value, the self-learning mechanism selects an intermediate temperature adjusting parameter, which indicates that the current power storage temperature is higher, so as to accurately acquire the storage capacity of the power storage unit, and the temperature of the power storage unit is greater than or equal to the second preset temperature, the self-learning mechanism selects smaller temperature adjusting parameters to avoid the damage to the storage unit due to unstable storage of the storage unit caused by overhigh temperature, so that the acquired storage capacity of the storage mechanism is reduced by selecting smaller temperature adjusting parameters, and the influence of the temperature on the storage process of the storage unit is avoided. And meanwhile, the self-learning mechanism adjusts the acquired temperature adjusting parameter according to the acquired electric storage unit loss and a preset electric storage unit loss standard value, wherein if the electric storage unit loss acquired by the self-learning mechanism is less than or equal to the electric storage unit loss standard value, the current electric storage unit loss is relatively light, so that the acquired temperature adjusting parameter is reduced, and the influence on the temperature caused by the electric storage unit loss is avoided, and if the electric storage unit loss acquired by the self-learning mechanism is greater than the electric storage unit loss standard value, the current electric storage unit loss is relatively heavy, so that the self-learning mechanism improves the temperature adjusting parameter, and the influence on the electric storage capacity caused by the accurate temperature is acquired.
In particular, the invention provides a method for evaluating the stability of the electric quantity of the electric storage unit during charging by acquiring the stability of the charging electric quantity according to the total electric quantity value of the electric storage unit in each cycle of charging of the electric storage unit, the central control unit compares the stability of the charging electric quantity of the electric storage unit with the preset stability of the charging electric quantity during the last charging, and adjusts the electric quantity of each electric storage mechanism in each cycle acquired by the self-learning unit, wherein if the stability of the charging electric quantity of the electric storage unit is less than or equal to the first preset stability of the charging electric quantity, the electric quantity change in the last charging process is stable, the central control unit does not adjust the electric quantity of each electric storage mechanism in each cycle, if the stability of the charging electric quantity of the electric storage unit is between the first preset stability of the charging electric quantity and the second preset stability of the charging electric quantity, the electric quantity change in the last charging process is slightly unstable, the central control unit keeps the electric quantity stable in the current charging process by reducing the electric quantity stored in each electric storage mechanism in each cycle by a small amplitude, if the electric quantity stability of the electric storage unit in charging is larger than or equal to a second preset electric quantity stability, the electric quantity change in the last charging process is extremely unstable, and the central control unit keeps the electric quantity stable in the current charging process by reducing the electric quantity stored in each electric storage mechanism in each cycle by a large amplitude.
In particular, the invention adjusts the current storage capacity of the storage mechanism by comparing the change rate of the current storage mechanism charging capacity with a preset value when charging is acquired, wherein if the change rate of the current storage mechanism charging capacity acquired by the central control unit is less than or equal to a first preset charging capacity change rate, the current storage capacity of the storage mechanism is reduced, the central control unit reduces the current storage capacity of the storage mechanism, the change rate of the current storage mechanism charging capacity acquired by the central control unit is between the first preset charging capacity change rate and a second preset charging capacity change rate, the current storage mechanism charging capacity change rate accords with a preset standard, the central control unit does not adjust the current storage capacity of the storage mechanism, the current storage mechanism charging capacity change rate acquired by the central control unit is greater than or equal to the second preset charging capacity change rate, the current storage mechanism charging capacity change is over-fast when charging, in order to avoid resource waste and damage to equipment such as the power storage unit, the central control unit improves the power storage capacity of the current power storage mechanism.
Drawings
Fig. 1 is a schematic structural diagram of a dc converter integrated electronic transformer for charging an automobile according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in conjunction with the following examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic diagram of an integrated electronic transformer of a dc converter for charging a vehicle according to an embodiment of the present invention, including,
a charging unit for charging the electric storage unit;
the transformer unit is connected with the charging unit and is used for transmitting the electric energy charged to the electric storage unit by the charging unit;
the electric power storage unit is used for storing electric energy and comprises a plurality of electric power storage mechanisms used for respectively storing the electric energy, the central control unit is used for circularly charging each electric power storage mechanism when the charging unit is used for charging the electric power storage unit, the charging unit is used for charging the next electric power storage mechanism after the electric quantity of the current electric power storage mechanism is charged to the electric quantity tj of each electric power storage mechanism in the jth cycle period, so that the electric power storage mechanism is charged in n cycle periods until the electric quantity of each electric power storage mechanism is full, namely, the electric power storage mechanism is charged once, wherein j =1,2.. n, n is the total cycle number of each charging, and n is a natural number which is more than or equal to 2;
the central control unit comprises a self-learning mechanism, acquires the storage capacity of each storage mechanism in each cycle period according to the total electric quantity value of the storage unit in each preset cycle period during historical charging, is connected with the charging unit and the storage unit, and is used for adjusting each parameter of the charging unit and the storage unit according to the acquired stability of the charging electric quantity of the storage unit during charging of the automobile;
When the central control unit judges that the charging unit charges the power storage unit, the central control unit sends the data of the electric quantity value of each cycle period in each charging of the power storage unit during historical charging to the self-learning mechanism, the self-learning mechanism calculates the power storage quantity tj of each power storage mechanism in each cycle period according to the electric quantity value of the power storage unit in each cycle period in each charging during historical charging, wherein tj = (T1j × yp1 × h1+ T2j × yp2 × h2 +. cndot. + Tmj × ypm × hm)/(m × h0), wherein yp1 is a power storage unit temperature adjustment parameter during first charging, yp2 is a power storage unit temperature adjustment parameter during second charging, h1 is power storage unit loss during first charging, h2 is power storage unit loss during second charging, and m is power storage unit loss during mth charging, h0 is a self-learning mechanism preset accumulator loss standard value, each preset cycle accumulator total electric quantity value T1 during the first charging, a first cycle accumulator total electric quantity value T11 during the first charging, a second cycle accumulator total electric quantity value T12. n cycle accumulator total electric quantity value T1n during the first charging, each cycle accumulator total electric quantity value T2 during the second charging, a first cycle accumulator total electric quantity value T21 during the second charging, a second cycle accumulator total electric quantity value T22. n cycle accumulator total electric quantity value T2 n. n. during the second charging, each cycle accumulator total electric quantity Tm during the m charging, a first cycle accumulator total electric quantity value Tm1 during the m charging, a second cycle accumulator total electric quantity value Tm 26. n cycle accumulator total electric quantity value T2 during the m charging, a second cycle accumulator total electric quantity value T1 during the m charging, and a cycle accumulator total electric quantity Tn during the m charging Setting the charging electric quantity stability d of the electric storage unit in the ith charging time by setting the total electric quantity value Tmn of the electric storage unit in the period, and setting d = ((Ti 1-Ti 0) 2 +（Ti2-Ti0） 2 +··· +（Tin-Ti0） 2 ) N, wherein Ti0= (Ti1+ Ti2 +. cndot. + Tin)/n, and the central control unit acquires the storage powerWhen the unit is charged last time, the central control unit obtains the stability of the charging electric quantity of the electric storage unit charged last time and is greater than the preset value, and judges that the calculated electric storage quantity tj of each electric storage mechanism is adjusted.
Specifically, in the embodiment of the present invention, the central control unit determines that the charging unit charges the electric storage units, the central control unit circularly charges the electric storage mechanisms, and more specifically, in a first cycle, after the charging unit charges the electric storage amount of the first electric storage mechanism to a first preset electric storage amount, the charging unit charges the electric storage amount of the second electric storage mechanism to the first preset electric storage amount, until the charging unit charges the electric storage amount of the nth electric storage mechanism to the first preset electric storage amount, the central control unit determines that a second cycle is performed, after the charging unit charges the electric storage amount of the first electric storage mechanism to the second preset electric storage amount, the charging unit charges the electric storage amount of the second electric storage mechanism to the second preset electric storage amount, until the charging unit charges the electric storage amount of the nth electric storage mechanism to the second preset electric storage amount, and the central control unit judges to perform a third cycle period until each power storage mechanism is fully charged.
The self-learning mechanism selects the loss of the accumulator unit during the ith charging according to the comparison between the charging times and the preset charging times, wherein,
when i is less than or equal to C1, the self-learning mechanism selects a first preset accumulator loss H1 as the accumulator loss hi during the charging;
when the i is more than C1 and less than or equal to C2, the self-learning mechanism selects a second preset accumulator loss H2 as the accumulator loss hi during the charging;
when the i is more than C2 and less than or equal to C3, the self-learning mechanism selects a third preset accumulator loss H3 as the accumulator loss hi during the charging;
when i is larger than C3, the self-learning mechanism selects a fourth preset accumulator loss H4 as the accumulator loss hi during the charging;
the self-learning mechanism is provided with an electricity storage unit loss H, a first preset electricity storage unit loss H1, a second preset electricity storage unit loss H2, a third preset electricity storage unit loss H3 and a fourth preset electricity storage unit loss H4, a preset charging frequency C, a first preset charging frequency C1, a second preset charging frequency C2 and a third preset charging frequency C3, wherein i =1,2 · · · m.
The self-learning mechanism obtains the temperature w of the accumulator unit during the ith charging and compares the temperature w with a preset temperature, and selects an accumulator unit temperature adjusting parameter,
When W is less than or equal to W1, the self-learning mechanism selects a first preset temperature adjusting parameter y1 as a storage unit temperature adjusting parameter ypi;
when the W is more than W1 and less than W2, the self-learning mechanism selects a second preset temperature adjusting parameter y2 as a storage unit temperature adjusting parameter ypi;
when W is larger than or equal to W2, the self-learning mechanism selects a third preset temperature adjusting parameter y3 as a storage unit temperature adjusting parameter ypi;
the self-learning mechanism is used for presetting a temperature W, setting a first preset temperature W1 and a second preset temperature W2, presetting a temperature adjusting parameter y, setting a first preset temperature adjusting parameter y1, a second preset temperature adjusting parameter y2 and a third preset temperature adjusting parameter y 3.
The self-learning mechanism adjusts the selected temperature adjustment parameter of the accumulator unit according to the comparison between the selected accumulator unit loss hi and a preset accumulator unit loss standard value, wherein,
when hi is less than or equal to h0, the self-learning mechanism reduces the selected power storage unit temperature adjusting parameter ypi to ypi1, and sets ypi1= ypi × (1- (h 0-hi)/h 0);
when hi > h0, the self-learning mechanism increases the selected power storage unit temperature adjustment parameter ypi to ypi2, and sets ypi2= ypi × (1 + (hi-h 0)/h 0).
Specifically, the self-learning mechanism acquires the electric storage amount of each electric storage mechanism in each cycle period according to the total electric storage unit electric quantity value in each preset cycle period, the loss of the charged electric storage unit and the temperature adjusting parameter during historical charging so as to accurately acquire the electric storage amount of each electric storage mechanism in each cycle period, wherein the acquisition of the electric storage unit loss, the acquisition of the important parameter of the electric storage amount of each electric storage mechanism in each cycle period according to the charging times, the charging times are less than a first preset charging time, the self-learning mechanism selects the smaller electric storage unit loss, the charging times are between the first preset charging time and a second preset charging time, the self-learning mechanism selects the electric storage unit loss with an intermediate value, the charging times are more than the second preset charging time, the self-learning mechanism selects the larger electric storage unit loss so as to ensure the accurate electric storage amount of each electric storage mechanism in each cycle period, meanwhile, in order to more accurately acquire the storage capacity of each cycle of each power storage mechanism, the self-learning mechanism sets a temperature adjusting parameter, when the self-learning mechanism acquires the charging in the ith period, the temperature of the power storage unit is compared with a preset value, and the temperature adjusting parameter is selected to compensate the storage capacity of each cycle of the power storage mechanism, wherein the temperature of the power storage unit is lower than a first preset temperature, which indicates that the current temperature of the power storage unit is lower than a standard value, the self-learning mechanism selects a higher temperature adjusting parameter, which prevents the problem that the power storage capacity of the power storage mechanism is poor due to too low temperature, so that the power storage capacity is insufficient, the temperature of the power storage unit is between the first preset temperature and a second preset temperature value, the self-learning mechanism selects an intermediate temperature adjusting parameter, which indicates that the current power storage temperature is higher, so as to accurately acquire the storage capacity of the power storage unit, and the temperature of the power storage unit is greater than or equal to the second preset temperature, the self-learning mechanism selects smaller temperature adjusting parameters to avoid the damage to the power storage unit due to unstable power storage of the power storage unit caused by overhigh temperature, so that the acquired power storage amount of the power storage mechanism is reduced by selecting smaller temperature adjusting parameters, and the influence of the temperature on the power storage process of the power storage unit is avoided. And meanwhile, the self-learning mechanism adjusts the acquired temperature adjusting parameter according to the acquired loss of the electric storage unit and a preset loss standard value of the electric storage unit, wherein if the loss of the electric storage unit acquired by the self-learning mechanism is less than or equal to the loss standard value of the electric storage unit, the current loss of the electric storage unit is relatively light, so that the acquired temperature adjusting parameter is reduced, and the influence of the loss of the electric storage unit on the temperature is avoided.
The central control unit adjusts the storage capacity tj of each storage mechanism in the j-th cycle according to the acquired stability D of the charging capacity of the storage unit and the stability D of the preset charging capacity during the last charging, wherein,
when D is less than or equal to D1, the central control unit does not adjust the acquired storage capacity tj of each storage mechanism in the j-th cycle;
when D1 < D < D2, the central control unit reduces the storage capacity tj of each storage mechanism in the j-th cycle to tj1;
when D is larger than or equal to D2, the central control unit reduces the storage capacity tj of each storage mechanism in the ith cycle to tj2;
the central control unit presets a charging capacity stability degree D, sets a first preset charging capacity stability degree D1 and a second preset charging capacity stability degree D2.
The center control unit obtains the power storage unit charging amount stability D between a first preset charging amount stability D1 and a second preset charging amount stability D2 at the time of the last charging, and reduces each power storage mechanism power storage amount tj to tj1 at the j-th cycle, setting tj1= tj x (1- (D-D1) x (D2-D)/(D1 x D2)).
The central control unit obtains the stability degree D of the charging electric quantity of the electric storage unit when the electric storage unit is charged last time and is larger than or equal to a second preset stability degree D2 of the charging electric quantity, the central control unit reduces the storage electric quantity tj of each electric storage mechanism in the j-th cycle to tj2, and tj2= tjx (1- (D-D2) 2 /D2）。
Specifically, the invention is provided with a charging electric quantity stability degree obtained according to the total electric quantity value of the electric storage unit in each cycle of the single charging of the electric storage unit, and used for evaluating the electric quantity stability degree of the electric storage unit in the charging process, and a central control unit compares the charging electric quantity stability degree of the electric storage unit with a preset charging electric quantity stability degree according to the last charging obtained, and adjusts the electric quantity of each electric storage mechanism in each cycle obtained by a self-learning mechanism, wherein if the charging electric quantity stability degree of the electric storage unit is less than or equal to a first preset charging electric quantity stability degree, the electric quantity change in the last charging process is stable, the central control unit does not adjust the electric quantity of each electric storage mechanism in each cycle, if the charging electric quantity stability degree of the electric storage unit is between the first preset charging electric quantity stability degree and a second preset charging electric quantity stability degree, the electric quantity change in the last charging process is slightly unstable, the central control unit keeps the electric quantity stable in the current charging process by reducing the electric quantity stored in each electric storage mechanism in each cycle by a small amplitude, if the electric quantity stability of the electric storage unit in charging is larger than or equal to a second preset electric quantity stability, the electric quantity change in the last charging process is extremely unstable, and the central control unit keeps the electric quantity stable in the current charging process by reducing the electric quantity stored in each electric storage mechanism in each cycle by a large amplitude.
The power storage unit comprises a plurality of power storage mechanisms, wherein a first power storage mechanism real-time electric quantity a1, a second power storage mechanism real-time electric quantity a2 DEG DEG.R power storage mechanism real-time electric quantity aR, the central control unit calculates the charging electric quantity change rate b of an R power storage mechanism in unit time, b =deltaar/w is set, wherein delta aR is the real-time electric quantity change value of the R power storage mechanism in preset time w, the central control unit compares the charging electric quantity change rate of the R power storage mechanism in unit time with the preset charging electric quantity change rate to adjust the power storage quantity tjf of the jth cycle period of the R power storage mechanism, and the central control unit adjusts the power storage quantity tjf of the jth cycle period of the R power storage mechanism according to the charging electric quantity change rate of the R power storage mechanism in unit time,
when B ≦ B1, the central control unit determines to decrease the stored electric energy amount tjf of the r-th storage mechanism for the j-th cycle period to tjf1, setting tjf1= tjf × (1- (B1-B)/B1);
when B1 < B2, the central control unit determines not to adjust the storage amount tjf of the jth cycle period of the r-th storage mechanism;
when B is larger than or equal to B2, the central control unit judges that the storage capacity tjf of the jth cycle of the r-th storage mechanism is increased to tjf2, and sets tjf2= tjf x (1+ (B-B2)/B2);
the central control unit presets a charging electric quantity change rate B, sets a first preset charging electric quantity change rate B1, and sets a second preset charging electric quantity change rate B2, f =1,2, R =1,2.
Specifically, the invention adjusts the current storage capacity of the storage mechanism by comparing the change rate of the current storage mechanism charging capacity with a preset value when charging is acquired, wherein if the change rate of the current storage mechanism charging capacity acquired by the central control unit is less than or equal to a first preset charging capacity change rate, the current storage capacity of the storage mechanism is reduced, the central control unit reduces the current storage capacity of the storage mechanism, the change rate of the current storage mechanism charging capacity acquired by the central control unit is between the first preset charging capacity change rate and a second preset charging capacity change rate, the current storage mechanism charging capacity change rate accords with a preset standard, the central control unit does not adjust the current storage capacity of the storage mechanism, the current storage mechanism charging capacity change rate acquired by the central control unit is greater than or equal to the second preset charging capacity change rate, the current storage mechanism charging capacity change is over-fast when charging, in order to avoid resource waste and damage to equipment such as the power storage unit, the central control unit improves the power storage capacity of the current power storage mechanism.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (8)
1. A dc converter integrated electronic transformer for use in automotive charging, comprising: a charging unit for charging the electric storage unit;
the transformer unit is connected with the charging unit and is used for transmitting the electric energy charged to the electric storage unit by the charging unit;
the electric power storage unit is used for storing electric energy and comprises a plurality of electric power storage mechanisms used for storing the electric energy respectively, the central control unit judges that when the charging unit charges the electric power storage units, the central control unit circularly charges all the electric power storage mechanisms, when the charging unit charges the electric power storage units, the charging unit charges the next electric power storage mechanism after the electric quantity of the current electric power storage mechanism is charged to the electric power storage quantity tj of each electric power storage mechanism in the jth cycle, the electric power storage mechanisms are charged in n cycles until all the electric power storage mechanisms are fully charged, namely, the electric power storage mechanisms are charged once, wherein j =1,2.. n, n is the total cycle number of each charging, and n is a natural number which is more than or equal to 2;
the central control unit comprises a self-learning mechanism, acquires the storage capacity of each storage mechanism in each cycle period according to the total electric quantity value of the storage unit in each preset cycle period during historical charging, is connected with the charging unit and the storage unit, and is used for adjusting each parameter of the charging unit and the storage unit according to the acquired stability of the charging electric quantity of the storage unit during charging of the automobile;
When the central control unit judges that the charging unit charges the power storage unit, the central control unit sends the data of the electric quantity value of each cycle period in each charging of the power storage unit during historical charging to the self-learning mechanism, the self-learning mechanism calculates the power storage quantity tj of each power storage mechanism in each cycle period according to the electric quantity value of the power storage unit in each cycle period in each charging during historical charging, wherein tj = (T1j × yp1 × h1+ T2j × yp2 × h2 +. cndot. + Tmj × ypm × hm)/(m × h0), wherein yp1 is a power storage unit temperature adjustment parameter during first charging, yp2 is a power storage unit temperature adjustment parameter during second charging, h1 is power storage unit loss during first charging, h2 is power storage unit loss during second charging, and m is power storage unit loss during mth charging, h0 is a self-learning mechanism with default standard loss value of the cells, the total charge value T1 of each default cycle during the first charging, the total charge value T11 of the cells during the first charging, and the total charge value T12. cndot. of the cells during the second chargingN cycle period electric power storage unit total electric power amount T1n at the time of first charging, each cycle period electric power storage unit total electric power amount T2 at the time of second charging, first cycle period electric power storage unit total electric power amount T21 at the time of second charging, second cycle period electric power amount T22. n cycle period electric power storage unit total electric power amount T2n at the time of second charging,. n cycle period electric power storage unit total electric power amount Tm at the time of m charging, first cycle period electric power storage unit total electric power amount Tm1 at the time of m charging, second cycle period electric power storage unit total electric power amount Tm 2. n at the time of m charging, n cycle period electric power storage unit total electric power amount Tmn at the time of i charging, electric power storage unit charging electric power amount stability d at the time of i charging, d = ((Ti 1-Ti 0) 2 +（Ti2-Ti0） 2 +···+（Tin-Ti0） 2 ) And/n, wherein Ti0= (Ti1+ Ti2 +. cndot. + Tin)/n, the central control unit acquires that the stability of the charging electric quantity of the last charging electric storage unit is greater than a preset value when the electric storage unit is charged last time, and determines to adjust the calculated electric storage quantity tj of each electric storage mechanism, meanwhile, the central control unit acquires that the change rate of the charging electric quantity of each electric storage mechanism is smaller than the preset value when the charging unit charges the electric storage unit, the central control unit determines to reduce the electric storage quantity tj of the electric storage mechanism, the central control unit acquires that the change rate of the charging electric quantity of each electric storage mechanism is greater than the preset value when the charging unit charges the electric storage unit, and the central control unit determines to increase the electric storage quantity tj of the electric storage mechanism so as to keep the charging of the automobile stable.
2. The DC converter integrated electronic transformer for vehicle charging as recited in claim 1, wherein the self-learning mechanism selects the power storage unit loss at the i-th charging according to the comparison between the charging time and the preset charging time, wherein,
when i is less than or equal to C1, the self-learning mechanism selects a first preset accumulator loss H1 as the accumulator loss hi during the charging;
when the i is more than C1 and less than or equal to C2, the self-learning mechanism selects a second preset accumulator unit loss H2 as the accumulator unit loss hi during the charging;
When the i is more than C2 and less than or equal to C3, the self-learning mechanism selects a third preset accumulator loss H3 as the accumulator loss hi during the charging;
when i is larger than C3, the self-learning mechanism selects a fourth preset accumulator loss H4 as the accumulator loss hi during the charging;
the self-learning mechanism is provided with an electricity storage unit loss H, a first preset electricity storage unit loss H1, a second preset electricity storage unit loss H2, a third preset electricity storage unit loss H3 and a fourth preset electricity storage unit loss H4, a preset charging frequency C, a first preset charging frequency C1, a second preset charging frequency C2 and a third preset charging frequency C3, wherein i =1,2 · · · m.
3. The DC converter integrated electronic transformer for vehicle charging as claimed in claim 2, wherein the self-learning mechanism obtains the temperature w of the accumulator unit at the i-th charging time and compares the temperature w with a preset temperature, and selects an accumulator unit temperature adjustment parameter, wherein,
when W is less than or equal to W1, the self-learning mechanism selects a first preset temperature adjusting parameter y1 as a storage unit temperature adjusting parameter ypi;
when W1 is larger than W and smaller than W2, the self-learning mechanism selects a second preset temperature adjusting parameter y2 as a storage unit temperature adjusting parameter ypi;
When W is more than or equal to W2, the self-learning mechanism selects a third preset temperature adjusting parameter y3 as a storage unit temperature adjusting parameter ypi;
the self-learning mechanism is used for presetting a temperature W, setting a first preset temperature W1 and a second preset temperature W2, presetting a temperature adjusting parameter y, setting a first preset temperature adjusting parameter y1, a second preset temperature adjusting parameter y2 and a third preset temperature adjusting parameter y 3.
4. The DC converter integrated electronic transformer for vehicle charging as recited in claim 3, wherein the self-learning mechanism adjusts the selected cell temperature adjustment parameter based on the selected cell loss hi compared to a predetermined cell loss criterion value, wherein,
when hi is less than or equal to h0, the self-learning mechanism reduces the selected storage unit temperature adjusting parameter ypi to ypi1, and sets ypi1= ypi x (1- (h 0-hi)/h 0);
when hi > h0, the self-learning mechanism increases the selected power storage unit temperature adjustment parameter ypi to ypi2, and sets ypi2= ypi × (1 + (hi-h 0)/h 0).
5. The DC converter integrated electronic transformer for vehicle charging according to claim 4, wherein the central control unit adjusts the storage capacity tj of each storage mechanism in the j-th cycle according to the acquired storage unit charging capacity stability D and the preset charging capacity stability D in the last charging, wherein,
When D is less than or equal to D1, the central control unit does not adjust the acquired storage capacity tj of each storage mechanism in the j-th cycle;
when D1 < D < D2, the central control unit reduces the storage capacity tj of each storage mechanism in the j-th cycle to tj1;
when D is larger than or equal to D2, the central control unit reduces the storage capacity tj of each storage mechanism in the ith cycle to tj2;
the central control unit presets a charging capacity stability degree D, sets a first preset charging capacity stability degree D1 and a second preset charging capacity stability degree D2.
6. The dc converter integrated electronic transformer for vehicle charging according to claim 5, wherein the central control unit obtains the power storage unit charging capacity stability D between a first preset charging capacity stability D1 and a second preset charging capacity stability D2 at the last charging, and the central control unit reduces each power storage mechanism power storage amount tj of the j-th cycle to tj1, setting tj1= tj x (1- (D-D1) x (D2-D)/(D1 x D2)).
7. The DC converter integrated electronic transformer of claim 6, wherein the central control unit obtains the last charging time, and the storage unit is chargedThe electric charge stability D is equal to or higher than a second preset charge stability D2, and the central control unit reduces the storage capacity tj of each storage mechanism in the j-th cycle to tj2, and sets tj2= tj x (1- (D-D2) 2 /D2）。
8. The DC converter integrated electronic transformer of claim 7, wherein the power storage units comprise a plurality of power storage mechanisms, wherein a first power storage mechanism real-time power a1, a second power storage mechanism real-time power a2 · R-th power storage mechanism real-time power aR, the central control unit calculates a charging power variation rate b of the R-th power storage mechanism per unit time, and sets b =Δar/w, where Δ aR is a real-time power variation value of the R-th power storage mechanism per preset time w, and the central control unit adjusts the power storage amount tjf of the j-th cycle period of the R-th power storage mechanism according to the comparison between the charging power variation rate of the R-th power storage mechanism per unit time and the preset charging power variation rate, wherein,
when B ≦ B1, the central control unit determines to decrease the stored electric energy amount tjf of the r-th storage mechanism for the j-th cycle period to tjf1, setting tjf1= tjf × (1- (B1-B)/B1);
when B1 < B2, the central control unit determines not to adjust the storage amount tjf of the jth cycle period of the r-th storage mechanism;
when B is greater than or equal to B2, the central control unit determines to increase the stored electric energy amount tjf of the r-th storage mechanism for the j-th cycle period to tjf2, and sets tjf2= tjf × (1+ (B-B2)/B2);
the central control unit presets a charging electric quantity change rate B, sets a first preset charging electric quantity change rate B1, and sets a second preset charging electric quantity change rate B2, wherein f =1,2, R =1,2.
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