CN116599190B - Rechargeable battery system capable of improving input current and control method - Google Patents
Rechargeable battery system capable of improving input current and control method Download PDFInfo
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- CN116599190B CN116599190B CN202310859574.3A CN202310859574A CN116599190B CN 116599190 B CN116599190 B CN 116599190B CN 202310859574 A CN202310859574 A CN 202310859574A CN 116599190 B CN116599190 B CN 116599190B
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Classifications
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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
- H02J7/007—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
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a rechargeable battery system capable of improving input current and a control method, which are applied to a charging power cabinet, wherein a charging module is connected with a rechargeable battery, an ECM (electronic module) module is in communication connection with a charging current converter through a CAN (controller area network) box, and the charging current converter is connected with the rechargeable battery; the charging current converter comprises a plurality of input converters and a plurality of output converters, wherein each input converter in the plurality of input converters is connected with only one output converter in the plurality of output converters; the input converters are used for improving input current, and the output converters are used for outputting the improved input current to the rechargeable battery; when the charging module carries out power transmission and distribution on the rechargeable battery, the ECM module controls the input current of the input converter in the charging current converter through the CAN box so as to improve the harmonic wave of the input current, reduce the power grid pollution, further improve the power transmission and distribution environment of the power grid and improve the use safety of the power transmission and distribution of the power grid.
Description
Technical Field
The invention relates to the technical field of rechargeable batteries of new energy automobiles, in particular to a rechargeable battery system capable of improving input current and a control method.
Background
In the power system of the new energy electric automobile, a charging module is used for charging a rechargeable battery in the new energy electric automobile.
At present, when a charging module charges a rechargeable battery in a new energy electric automobile, power generation equipment (a power supply end), power transmission and distribution equipment and other equipment can generate power grid harmonic waves to form power grid pollution, so that the safe operation of loads such as a motor and a transformer and a power system is endangered, and power transmission and distribution accidents are easily caused.
Disclosure of Invention
The embodiment of the invention provides a rechargeable battery system capable of improving input current and a control method thereof, aiming at solving the problem that potential safety hazards exist in the process of inputting current into a rechargeable battery of a new energy electric automobile by a charging module in the prior art.
In order to solve the above problems, in a first aspect, an embodiment of the present invention provides a rechargeable battery system capable of improving an input current, which is applied to a charging power cabinet, and includes a charging module and a rechargeable battery; the charging module is connected with the rechargeable battery and comprises an ECM module, a CAN box and a charging current converter, wherein the ECM module is in communication connection with the charging current converter through the CAN box, and the charging current converter is connected with the rechargeable battery; the charging current converter comprises a plurality of input converters and a plurality of output converters, wherein each input converter in the plurality of input converters is connected with only one output converter in the plurality of output converters; the input converter is used for improving input current, and the output converter is used for outputting improved input current to the rechargeable battery.
In a second aspect, an embodiment of the present invention further provides a control method of a rechargeable battery system capable of improving an input current, which is applied to the rechargeable battery system capable of improving an input current according to the first aspect, wherein the method includes dynamically allocating an address bit to each input converter included in the charge current converter by an ECM module through a CAN box; the ECM module determines master-slave machine division information comprising an input converter master machine and an input converter slave machine according to a preset master machine determination strategy and address bits of each input converter; the ECM module determines delay signals of all input converters in the charging current converter according to the master-slave machine dividing information; the delay signals corresponding to the input converter hosts are host delay signals, and the delay signals corresponding to the input converter slaves are slave delay signals; the ECM module sends carrier synchronous signals, input currents and corresponding delay signals to each input converter; each input converter determines a corresponding PWM signal based on the carrier synchronization signal and a corresponding delay signal; each input converter adjusts the input current based on the PWM signal to obtain an improved input current output by each input converter; and each output converter outputs the improved input current corresponding to the input to be combined to obtain output current and input the output current to the rechargeable battery.
The embodiment of the invention provides a rechargeable battery system capable of improving input current and a control method, which are applied to a charging power cabinet, wherein a charging module is connected with a rechargeable battery, an ECM (electronic module) module is in communication connection with a charging current converter through a CAN (controller area network) box, and the charging current converter is connected with the rechargeable battery; the charging current converter comprises a plurality of input converters and a plurality of output converters, wherein each input converter in the plurality of input converters is connected with only one output converter in the plurality of output converters; the input converters are used for improving input current, and the output converters are used for outputting the improved input current to the rechargeable battery; when the charging module carries out power transmission and distribution on the rechargeable battery, the ECM module controls the input current of the input converter in the charging current converter through the CAN box so as to improve the harmonic wave of the input current, reduce the power grid pollution, further improve the power transmission and distribution environment of the power grid and improve the use safety of the power transmission and distribution of the power grid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a rechargeable battery system capable of improving an input current according to an embodiment of the present invention;
fig. 2 is a flow chart of a control method of a rechargeable battery system capable of improving an input current according to an embodiment of the invention.
Wherein, each reference sign in the figure:
1. rechargeable battery system capable of improving input current; 10. a charging module; 11. CAN box; 20. a rechargeable battery; 30. An ECM module; 40. A charging current converter; 41. an input converter; 42. an output converter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms of directions used in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1-2, fig. 1 is a schematic block diagram of a rechargeable battery system capable of improving input current according to an embodiment of the present invention; fig. 2 is a flow chart of a control method of a rechargeable battery system capable of improving an input current according to an embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a rechargeable battery system 1 capable of improving input current, which is applied to a charging power cabinet and comprises a charging module 10 and a rechargeable battery 20; the charging module 10 is connected with the rechargeable battery 20, the charging module 10 comprises an ECM module 30, a CAN box 11 and a charging current converter 40, the ECM module 30 is in communication connection with the charging current converter 40 through the CAN box 11, and the charging current converter 40 is connected with the rechargeable battery 20; the charging current converter 40 includes a plurality of input converters 41 and a plurality of output converters 42, each input converter 41 of the plurality of input converters 41 is connected with only one output converter 42 of the plurality of output converters 42; the input converter 41 is used for improving the input current, and the output converter 42 is used for outputting the improved input current to the rechargeable battery 20.
In this embodiment, the ECM (Electronic Control Module ) module 30 establishes communication with the charging current converter 40 through the CAN (Controller Area Network, multi-line network communication system) box and issues control instructions or control signals to control the input converter 41 to achieve the effect of improving the input current.
The rechargeable battery 20 system may further include a power grid, one end of the charging module 10 may be connected to the power grid, and the other end of the charging module 10 may be connected to the rechargeable battery 20. The rated frequency adopted by the power grid in power generation, transmission, transformation and distribution equipment and industrial and civil electrical equipment of a power system can be 50Hz, 100Hz and other frequencies.
One input converter 41 of the plurality of input converters 41 corresponds to one output converter 42 of the plurality of output converters 42, that is, each input converter 41 is connected to a unique one of the output converters 42; a plurality of output converters 42 are connected to the rechargeable battery 20.
The power grid inputs the input current to the charging module 10, the ECM module 30 controls the input current and improves the input current through the input converter 41 to obtain the improved input current, and the output converter 42 outputs the improved input current to the rechargeable battery 20.
Through the above embodiment, the connection relationship between the charging module 10 and the rechargeable battery 20 provides a good basic design for the subsequent control method.
In one embodiment, as shown in FIG. 1, the input converter 41 is an AC/DC converter.
In this embodiment, as shown in fig. 1, the AC/DC converter is a device that converts alternating current into direct current.
In this embodiment, the input current input to the charging module 10 by the power grid is an alternating current, the alternating current is converted by the AC/DC converter and is improved to the improved input current, the improved input current is a direct current, and the improved input current is a direct current with a certain voltage level.
By the above-described embodiment, the input converter 41 converts alternating current into direct current, which provides a good base design for improving the input current.
In one embodiment, as shown in FIG. 1, the output converter 42 is a DC/DC converter.
In this embodiment, the DC/DC converter is a device that converts a DC power supply of a certain voltage level into a DC power supply of another voltage level.
In this embodiment, the DC/DC converter converts the improved input current into DC with other voltage levels and outputs the DC to the rechargeable battery 20.
With the above embodiments, the output converter 42 converts direct current of a certain voltage level into direct current of another voltage level, which provides a good base design for improving the input current.
The embodiment of the invention also provides a control method of the rechargeable battery system capable of improving the input current, and fig. 2 is a flow chart of the control method of the rechargeable battery system capable of improving the input current. The control method of the rechargeable battery system capable of improving the input current is applied to the rechargeable battery system 1 capable of improving the input current. As shown in fig. 2, the method includes the following steps S110 to S170.
S110, the ECM module 30 dynamically allocates one address bit to each input converter 41 included in the charging current converter 40 through the CAN box 11.
In one embodiment, the ECM module 30 dynamically allocates one address bit to each input converter 41 included in the charging current converter 40 through the CAN box 11, including:
the ECM module 30 obtains a preset idle address bit and a preset random algorithm;
the ECM module 30 obtains a second total number of the input converters 41 included in the charging current converter 40;
the ECM module 30 generates a random number having the same number as the second total number based on the random algorithm and the second total number;
the ECM module 30 adds each random number to the preset idle address bit to obtain a random address bit corresponding to each random number;
the ECM module 30 assigns each random address bit to one of the input converters 41 of the charge current converter 40 through the CAN box 11, respectively.
In this embodiment, the address bit is a logical address of the input converter 41 in the ECM module 30, the preset idle address bit is any idle address in the ECM module 30, the random algorithm is a program code algorithm written in the ECM module 30, the second total number is a sum of the numbers of the input converters 41, the random number is a non-repeated positive integer greater than or equal to 1, and the total number of the random numbers is equal to the second total number.
In this embodiment, if the preset idle address bits are 0x3D25 and the sum of the numbers of the input converters 41 is 5, the second total number is 5, the ECM module 30 generates a random number having the same number as the second total number 5 based on the random algorithm programmed in advance and the second total number 5, and the random address bits of the 5 input converters 41 may be 0x3D27, 0x3D2C, 0x3D29, 0x3D28, 0x3D2D assuming that the random numbers generated according to the random algorithm are 2, 7, 4, 3, 8. When the random address bits are obtained, the ECM module 30 determines whether each random address bit is a free address bit, if the current random address bit is not a free address bit, 1 is added to the current random address bit, and the current random address bit after 1 is added is further determined whether the current random address bit is a free address bit; if each random address bit is a free address bit, it is determined that the random address bits of the 5 input converters 41 may be 0x3D27, 0x3D2C, 0x3D29, 0x3D28, 0x3D2D. The ECM module 30 allocates each determined random address bit to one of the input converters 41 of the charging current converter 40 through the CAN box 11, respectively, to complete an operation of dynamically allocating one address bit to each input converter 41.
Through the above embodiment, the ECM module 30 generates the random numbers according to the preset idle address bits, the random algorithm, and the second total number, and adds each random number to the preset idle address bits to obtain random address bits corresponding to each random number, and distributes each random address bit to one of the input converters 41 of the charging current converter 40 through the CAN box 11, so that the ECM module 30 dynamically distributes one address bit for each input converter, and provides a basis for subsequent operations of the control method.
S120, the ECM module 30 determines master-slave partition information including the input converter master and the input converter slave according to a preset master determination strategy and address bits of each input converter 41.
In one embodiment, the ECM module 30 determines master-slave partition information including the input converter master and the input converter slave according to a predetermined master determination policy and address bits of each input converter 41, including:
the ECM module 30 obtains the input converter 41 having the lowest address bit among the plurality of input converters 41 as the input converter host based on the preset host determination policy;
the ECM module 30 sorts the input converters 41 except the input converter host among the plurality of input converters 41 according to the ascending order of the address bits based on the preset host determination policy, so as to obtain an address bit sorting result;
the ECM module 30 uses the input converter 41 corresponding to each address bit in the address bit ordering result as an input converter slave, and determines the slave serial number of each input converter slave according to the address bit ordering result;
the ECM module 30 determines the master-slave partition information according to the input converter master, each input converter slave, and the slave serial numbers corresponding to each input converter slave.
In this embodiment, the preset master determination policy determines the division of the input converter master and the input converter slave according to the order of the input converters 41 that determine the address bits, and the slave serial number is a positive integer that is obtained by subtracting 1 from the second total number and incrementing from 1.
In this embodiment, if the second total number of the input converters 41 is 5 and the determined address bits of each input converter 41 are 0x3D27, 0x3D2C, 0x3D29, 0x3D28, and 0x3D2D, respectively, then the input converter 41 whose address bit is 0x3D27 is determined as the input converter host based on the preset host determination policy; based on the preset host determining policy, other input converters 41 except the input converter host among the plurality of input converters 41 are sorted according to the ascending order of address bits, so as to obtain an address bit sorting result, and the address bit sorting result is 0x3D28, 0x3D29, 0x3D2C, 0x3D2D, so that the slave serial numbers are 1, 2, 3, and 4.
Through the above embodiment, the ECM module 30 determines the slave serial numbers corresponding to the input converter master, the input converter slave and the input converter slaves according to the preset master determination policy and the address bits of each input converter 41, and determines the master-slave partition information according to the slave serial numbers, thus providing a basis for the subsequent operation of the control method.
S130, the ECM module 30 determines delay signals of each input converter 41 in the charging current converter 40 according to the master-slave machine division information; the delay signals corresponding to the input converter host are host delay signals, and the delay signals corresponding to the input converter slaves are slave delay signals.
In one embodiment, the ECM module 30 determines the delay signal of each input converter 41 in the charging current converter 40 according to the master-slave partition information, including:
the ECM module 30 obtains a first total number of the input converters 41 included in the charging current converter 40;
the slave of each input converter in the ECM module 30 divides the number of the slave by the first total number to obtain a delay signal with each input converter 41 in the charging current converter 40.
In this embodiment, the first total number is the sum of the numbers of the input converters 41, and if the slave serial number of the input converter master defaults to 0, the master delay signal is 0.
In this embodiment, if the address bit of the input converter host is 0x3D27 and the address bit ordering result of the input converter slave is 0x3D28, 0x3D29, 0x3D2C, 0x3D2D, the host delay signal of the input converter host whose address bit is 0x3D27 is 0, and the slave delay signal of the input converter slave whose address bit ordering result is 0x3D28, 0x3D29, 0x3D2C, 0x3D2D is 1/5, 2/5, 3/5, 4/5, respectively.
Through the above embodiment, the ECM module 30 obtains the delay signals corresponding to the input converters 41 according to the first total number and the slave serial number, so as to provide a basis for the subsequent operation of the control method.
S140, the ECM module 30 sends the carrier synchronization signal, the input current, and the corresponding delay signal to each input converter 41.
In this embodiment, the ECM module 30 sends the carrier synchronization signal, the input current, and the host delay signal to the input converter host; the ECM module 30 sends the carrier synchronization signal, the input current, and the corresponding slave delay signal to each input converter slave, respectively.
In this embodiment, the carrier synchronization signal is a local oscillation that generates a carrier with the same frequency and the same phase as the carrier of the received signal in the receiving device, the input current is a current input to the charging module 10 by the power grid, and the delay signal includes the master delay signal and the slave delay signal.
S150, each input converter 41 determines a corresponding PWM signal based on the carrier synchronization signal and the corresponding delay signal.
In one embodiment, each of the input converters 41 determines a corresponding PWM signal based on the carrier synchronization signal and a corresponding delay signal, including:
each input converter 41 acquires an input current period of the carrier synchronization signal;
determining a misalignment adjustment signal corresponding to each input converter 41 based on the product of the delay signal of each input converter 41 and the input current period;
each input converter 41 performs offset adjustment on the carrier synchronization signal according to the corresponding offset adjustment signal, and obtains a PWM signal corresponding to each input converter 41.
In this embodiment, the PWM (Pulse Width Modulation) signal is determined based on the carrier synchronization signal and a corresponding delay signal, and the input current period is the time interval in seconds of the input current to the ECM module 30 by the grid.
In this embodiment, if the host delay signal of the input converter host of the address bit is 0x3D27 is 0, the slave delay signals of the input converter slaves of the address bit ordering result is 0x3D28, 0x3D29, 0x3D2C, 0x3D2D are 1/5, 2/5, 3/5, 4/5, respectively, and assuming that the input current period is 2 seconds, the misalignment adjustment signal of the input converter host of the address bit is 0x3D27 is 0 seconds, and the misalignment adjustment signal of the input converter slaves of the address bit ordering result is 0x3D28, 0x3D29, 0x3D2C, 0x3D2D is 0.4 seconds, 0.8 seconds, 1.2 seconds, 1.6 seconds, respectively. In this way, the input converter host, after receiving the carrier synchronization signal, performs offset adjustment on the carrier synchronization signal according to the corresponding offset adjustment signal, and obtains PWM signals corresponding to the input converters 41 to improve the input currents.
Through the above embodiment, the offset adjustment signal corresponding to each input converter 41 is determined based on the product of the delay signal and the input current period of each input converter 41, the carrier synchronization signal is offset adjusted according to the corresponding offset adjustment signal, so as to obtain the PWM signal corresponding to each input converter 41, and each input converter 41 improves the offset of the input current according to the PWM signal so as to improve the harmonic of the input current, so that when the charging module 10 performs power transmission and distribution on the rechargeable battery 20, the ECM module 30 controls the input current of the input converter 41 in the charging current converter 40 through the CAN box 11 so as to improve the harmonic of the input current, reduce the power grid pollution, further improve the power transmission and distribution environment of the power grid, and improve the use safety of the power grid.
S160, each input converter 41 adjusts the input current based on the PWM signal, and obtains an improved input current output from each input converter 41.
In this embodiment, if the address bit is 0x3D27 and the misalignment adjustment signal of the input converter master is 0 seconds, the address bit ordering result is 0x3D28, 0x3D29, 0x3D2C, and 0x3D2D, and the misalignment adjustment signal of the input converter slave is 0.4 seconds, 0.8 seconds, 1.2 seconds, and 1.6 seconds, respectively, and it is assumed that each input converter receives the carrier synchronization signal at the same time, the input converter master outputs the improved input current to the corresponding output converter 42 in the input current period of 2 seconds after 0 seconds after receiving the carrier synchronization signal; each of the input converter slaves, upon receiving the carrier synchronization signal, outputs the improved input current to the corresponding output converter 42 at the input current period of 2 seconds after 0.4 seconds, 0.8 seconds, 1.2 seconds, and 1.6 seconds, respectively. In this way, the improved input current output at the same time is small, that is, the improved input current is offset-adjusted and output to improve a large number of harmonics generated by outputting a large amount of the entire input current.
S170, each output converter 42 outputs the improved input current corresponding to the input to combine to obtain an output current and input the output current to the rechargeable battery 20.
In this embodiment, since the improved input current obtained by each input converter 41 is offset-adjusted, the output current has fewer harmonics, and the waveform frequency of the output current is flatter, so that the power grid pollution is reduced, and the power grid power transmission and distribution environment is improved.
In an embodiment, after the step of adjusting the input current by each input converter 41 based on the PWM signal to obtain the improved input current output by each input converter 41, before the step of outputting the improved input current corresponding to the input by each output converter 42 to combine to obtain an output current and input to the rechargeable battery 20, the method further includes:
each input converter 41 inputs the improved input current to a corresponding output converter 42.
In this embodiment, the input converters 41 adjust the input current based on the PWM signal to obtain an improved input current output by each input converter 41, each input converter 41 inputs the improved input current to a corresponding output converter 42, and each output converter 42 outputs the corresponding input improved input current to be combined to obtain an output current and input to the rechargeable battery 20.
In one embodiment, after each output converter 42 outputs the improved input current corresponding to the input to combine to obtain an output current and input to the rechargeable battery 20, the method further comprises:
the rechargeable battery 20 transmits an operating parameter corresponding to the improved input current based on the operating parameter to the ECM module 30.
In this embodiment, each output converter 42 outputs the improved input current corresponding to the input to be combined to obtain an output current and input the output current to the rechargeable battery 20, and the rechargeable battery 20 sends the operation parameters corresponding to the input current based on the improvement to the ECM module 30.
In this embodiment, the operating parameters are amounts used to characterize the rechargeable battery 20 and may include resistance, reactance, time constant, moment of inertia, rated voltage, current, and electrical power.
Through the above-described implementation, the ECM module 30 dynamically allocates one address bit to each of the input converters 41 included in the charge current converter 40 through the CAN box 11; the ECM module 30 determines master-slave partition information including the input converter master and the input converter slave according to a preset master determination policy and address bits of each input converter 41; the ECM module 30 determines a delay signal of each input converter 41 in the charging current converter 40 according to the master-slave partition information; the delay signals corresponding to the input converter hosts are host delay signals, and the delay signals corresponding to the input converter slaves are slave delay signals; the ECM module 30 sends a carrier synchronization signal, an input current, and a corresponding delay signal to each input converter 41; each input converter 41 determines a respective PWM signal based on the carrier synchronization signal and a corresponding delay signal; each input converter 41 adjusts the input current based on the PWM signal to obtain an improved input current output by each input converter 41; each output converter 42 outputs the improved input current corresponding to the input to combine to obtain an output current and input the output current to the rechargeable battery 20, so that when the charging module 10 performs power transmission and distribution on the rechargeable battery 20, the ECM module 30 controls the input current of the input converter 41 in the charging current converter 40 through the CAN box 11 to improve the harmonic wave of the input current, reduce the power grid pollution, improve the power transmission and distribution environment of the power grid, and improve the use safety of the power transmission and distribution of the power grid.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. A control method of rechargeable battery system capable of improving input current; the rechargeable battery system capable of improving the input current is applied to a charging power cabinet and comprises a charging module and a rechargeable battery; the charging module is connected with the rechargeable battery and comprises an ECM module, a CAN box and a charging current converter, wherein the ECM module is in communication connection with the charging current converter through the CAN box, and the charging current converter is connected with the rechargeable battery; the charging current converter comprises a plurality of input converters and a plurality of output converters, wherein each input converter in the plurality of input converters is connected with only one output converter in the plurality of output converters; the input converter is used for improving input current, and the output converter is used for outputting the improved input current to the rechargeable battery; the input converter is an AC/DC converter, and the output converter is a DC/DC converter; characterized in that the method comprises:
the ECM module dynamically allocates an address bit to each input converter included in the charging current converter through the CAN box;
the ECM module determines master-slave machine division information comprising an input converter master machine and an input converter slave machine according to a preset master machine determination strategy and address bits of each input converter;
the ECM module determines delay signals of all input converters in the charging current converter according to the master-slave machine dividing information; the delay signals corresponding to the input converter hosts are host delay signals, and the delay signals corresponding to the input converter slaves are slave delay signals;
the ECM module sends carrier synchronous signals, input currents and corresponding delay signals to each input converter;
each input converter determines a corresponding PWM signal based on the carrier synchronization signal and a corresponding delay signal;
each input converter adjusts the input current based on the PWM signal to obtain an improved input current output by each input converter;
and each output converter outputs the improved input current corresponding to the input to be combined to obtain output current and input the output current to the rechargeable battery.
2. The method of claim 1, wherein the ECM module determining master-slave partition information including the input converter master and the input converter slave according to a preset master determination policy and address bits of each input converter, comprises:
the ECM module obtains an input converter with the lowest address bit in a plurality of input converters as an input converter host based on the preset host determination strategy;
the ECM module sorts other input converters except the input converter host according to the ascending order of the address bits in the plurality of input converters based on the preset host determining strategy to obtain an address bit sorting result;
the ECM module takes an input converter corresponding to each address bit in the address bit sequencing result as an input converter slave machine, and determines the slave machine serial number of each input converter slave machine according to the address bit sequencing result;
and the ECM module determines the master-slave machine partition information according to the input converter master machine, the input converter slave machines and the slave machine serial numbers corresponding to the input converter slave machines.
3. The method of claim 2, wherein the ECM module determining the delay signal of each of the input converters of the charge current converter based on the master-slave partition information, comprises:
the ECM module obtains a first total number of the input converters included in the charging current converter;
and dividing the number of the slaves by the first total number by the slaves of each input converter in the ECM module to obtain delay signals of each input converter in the charging current converter.
4. The method of claim 1, wherein the ECM module dynamically allocates one address bit to each input converter included in the charge current converter through the CAN box, comprising:
the ECM module acquires a preset idle address bit and a preset random algorithm;
the ECM module obtains a second total number of the input converters included in the charging current converter;
the ECM module generates random numbers with the same number as the second total number based on the random algorithm and the second total number;
the ECM module adds each random number with the preset idle address bit to obtain random address bits corresponding to each random number respectively;
the ECM module assigns each random address bit to one of the charge current converters through the CAN box, respectively.
5. The method of claim 1, wherein each input converter determines a respective PWM signal based on the carrier synchronization signal and a corresponding delay signal, comprising:
each input converter acquires an input current period of the carrier synchronization signal;
determining a dislocation adjusting signal corresponding to each input converter based on the product of the delay signal of each input converter and the input current period;
and each input converter carries out dislocation adjustment on the carrier synchronous signal according to the corresponding dislocation adjustment signal to obtain a PWM signal corresponding to each input converter.
6. The method of claim 1, wherein after the step of each input converter adjusting the input current based on the PWM signal to obtain an improved input current output by each input converter, before the step of each output converter outputting the improved input current corresponding to the input to combine to obtain an output current and input to the rechargeable battery, the method further comprises:
each input converter inputs the improved input current to a corresponding output converter.
7. The method of claim 1, wherein after each output converter outputs the improved input current corresponding to the input to combine to obtain an output current and input to the rechargeable battery, the method further comprises:
the rechargeable battery transmits an operating parameter corresponding to the improved input current based on the input current to the ECM module.
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