CN115411813A - Charging control method and system - Google Patents
Charging control method and system Download PDFInfo
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- CN115411813A CN115411813A CN202211047277.0A CN202211047277A CN115411813A CN 115411813 A CN115411813 A CN 115411813A CN 202211047277 A CN202211047277 A CN 202211047277A CN 115411813 A CN115411813 A CN 115411813A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 68
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 238000007781 pre-processing Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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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
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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
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Nonlinear Science (AREA)
- Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a charging control method and a charging control system, wherein the method comprises the following steps: acquiring the current charging state of the lithium battery pack; determining a voltage modulation control signal based on the current state of charge; and controlling a voltage modulation module connected between the current limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal. According to the charging control method, the voltage output to the lithium battery pack by the output element is modulated by the voltage modulation module according to the charging state of the lithium battery, so that the voltage difference between the output voltage and the charging voltage of the lithium battery pack is reduced, the amplitude of possibly generated current pulses is reduced, and the converter and the lithium battery pack are protected from being damaged by the current pulses.
Description
Technical Field
The invention relates to the technical field of battery pack charging of new energy electric vehicles, in particular to a charging control method and a charging control system.
Background
The energy of the new energy electric car is mainly provided for the lithium battery pack, and when the lithium battery pack is charged, current pulse can be generated due to the fact that the voltage value of an output element of the converter is different from the voltage value of the lithium battery pack. In order to avoid the damage of the current pulse to the charging converter and the lithium battery, a current limiting resistor is usually adopted for limiting; the current produced is dissipated through a current limiting resistor, which limits the current pulse, but the effect is not ideal.
Disclosure of Invention
One of the objectives of the present invention is to provide a charging control method, in which a voltage modulation module modulates a voltage output from an output element to a lithium battery pack according to a charging state of a lithium battery, so as to reduce a voltage difference between an output voltage and a charging voltage of the lithium battery pack, reduce an amplitude of a current pulse that may be generated, and further protect a converter and the lithium battery pack from damage caused by the current pulse.
The charging control method provided by the embodiment of the invention comprises the following steps:
acquiring the current charging state of the lithium battery pack;
determining a voltage modulation control signal based on the current state of charge;
and controlling a voltage modulation module connected between the current limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
Preferably, the acquiring the current charging state of the lithium battery pack includes:
acquiring the battery voltage of the lithium battery pack;
determining a voltage modulation control signal based on the current state of charge, comprising:
preprocessing the battery voltage to obtain a marking voltage;
determining a generation mode of a voltage modulation control signal based on the marking voltage;
based on the generation manner, a voltage modulation control signal is generated.
Preferably, the determining the generation mode of the voltage modulation control signal based on the indication voltage includes:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are reduced in sequence; the duty ratios of the voltage modulation control signals generated through the first, second, third, fourth, and fifth modes are sequentially decreased.
Preferably, the acquiring the current charging state of the lithium battery pack includes:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring an output voltage of the converter;
acquiring second type identification information of the converter;
and taking the battery voltage, the output voltage, the first type identification information and the second type identification information as the state data of the current charging state.
Preferably, the determining the voltage modulation control signal based on the current state of charge comprises:
calculating the difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference;
determining a second parameter value based on the first type identification information;
determining a third parameter value based on the second type identification information;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value;
determining a generation mode of the voltage modulation control signal based on the mode determination vector and a preset mode determination library;
based on the generation manner, a voltage modulation control signal is generated.
The present invention also provides a charge control system, including:
the acquisition module is used for acquiring the current charging state of the lithium battery pack;
a determination module for determining a voltage modulation control signal based on a current state of charge;
and the modulation module is used for controlling the voltage modulation module connected between the current limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
Preferably, the obtaining module obtains the current charging state of the lithium battery pack, and executes the following operations:
acquiring the battery voltage of the lithium battery pack;
the determination module determines a voltage modulation control signal based on the current state of charge, and performs the following operations:
preprocessing the battery voltage to obtain a marking voltage;
determining a generation mode of the voltage modulation control signal based on the marking voltage;
based on the generation manner, a voltage modulation control signal is generated.
Preferably, the determining module determines the generation mode of the voltage modulation control signal based on the indication voltage, and performs the following operations:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are reduced in sequence; the duty ratios of the voltage modulation control signals generated through the first, second, third, fourth, and fifth modes are sequentially decreased.
Preferably, the obtaining module obtains a current charging state of the lithium battery pack, and executes the following operations:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring the output voltage of the converter;
acquiring second type identification information of the converter;
the battery voltage, the output voltage, the first type identification information, and the second type identification information are used as state data of the current state of charge.
Preferably, the determining module determines the voltage modulation control signal based on the current charging state, and performs the following operations:
calculating the difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference;
determining a second parameter value based on the first type identification information;
determining a third parameter value based on the second type identification information;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value;
determining a generation mode of the voltage modulation control signal based on the mode determination vector and a preset mode determination library;
based on the generation manner, a voltage modulation control signal is generated.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a charging control method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an embodiment of a circuit according to the present invention;
fig. 3 is a schematic diagram of a charging control system according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
An embodiment of the present invention provides a charging control method, as shown in fig. 1, including:
step S1: acquiring the current charging state of the lithium battery pack;
step S2: determining a voltage modulation control signal based on the current state of charge;
and step S3: and controlling a voltage modulation module connected between the current limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
The working principle and the beneficial effects of the technical scheme are as follows:
the loaded charging voltage is modulated based on the current charging state of the lithium battery, so that the voltage difference between the lithium battery pack and the charging voltage is reduced, and the amplitude of current pulse caused by the voltage difference is reduced; the converter and the lithium battery pack are protected together with the current-limiting resistor; the voltage modulation module comprises an electric control switch and a control element for controlling the on-off of the electric control switch; the instantaneous on-off of the electric control switch is controlled by a control element to realize the modulation of the voltage; for example: the electric control switch 11 comprises any one of a field effect transistor, an insulated gate bipolar transistor and a metal oxide semiconductor field effect transistor; the control element 12 is connected to the gate of the electronic control switch 11, and controls the on/off of the electronic control switch 11 by applying a voltage to the gate, thereby realizing the modulation of the charging voltage.
In one embodiment, acquiring the current charging state of the lithium battery pack comprises:
acquiring the battery voltage of the lithium battery pack;
determining a voltage modulation control signal based on the current state of charge, comprising:
preprocessing the battery voltage to obtain a marking voltage; for example: performing voltage reduction processing to perform subtraction operation on the battery voltage and a preset reference voltage; extracting the part of the battery voltage higher than the reference voltage; the reference voltage is the lowest voltage which can be reached when the lithium battery pack is normally used;
determining a generation mode of a voltage modulation control signal based on the marking voltage;
based on the generation manner, a voltage modulation control signal is generated. The voltage modulation control signal is a PWM signal; the generation of the PWM signal is mainly realized by the PWM signal generator 13;
wherein, based on the marking voltage, determining the generation mode of the voltage modulation control signal comprises:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are reduced in sequence; the duty ratios of the voltage modulation control signals generated through the first, second, third, fourth, and fifth modes are sequentially decreased.
The working principle and the beneficial effects of the technical scheme are as follows:
the first mode, the second mode, the third mode, the fourth mode and the fifth mode respectively correspond to the modulation modes of the PWM signals with different duty ratios, the comparison of the marking voltage with the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage can be realized by a plurality of comparators, and the reference voltage of each comparator 14 respectively corresponds to the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage; when the index voltage is greater than the reference voltage of the comparator 14, the comparator 14 is turned on; as the number of the comparators 14 that are turned on increases, the duty ratio of the PWM signal generated by the PWM signal generator 13 also increases, and as the duty ratio increases, the modulated voltage approaches the output voltage of the converter; at the initial charging stage, the duty ratio is small, and the modulated output voltage is low and is close to the voltage of the lithium battery pack; when the voltage of the lithium battery pack is increased along with the increase of the charging time, the synchronous duty ratio is increased, the modulated output voltage is also increased, the output voltage and the voltage of the lithium battery pack are kept at a certain difference value by modulating the voltage, and the maximum value of the current which is possibly generated is reduced; as shown in fig. 2, the index voltage is applied to the voltage applying unit 15; the mode signal is generated by comparing the plurality of comparators 14 of the voltage comparison unit and transmitted to the PWM signal generator 13, thereby generating the PWM signal of the control element 12.
In one embodiment, acquiring the current charging state of the lithium battery pack comprises:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring an output voltage of the converter;
acquiring second type identification information of the converter;
and taking the battery voltage, the output voltage, the first type identification information and the second type identification information as the state data of the current charging state.
Wherein determining the voltage modulation control signal based on the current state of charge comprises:
calculating the difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference; the difference value can be directly used as a first parameter value;
determining a second parameter value based on the first type identification information; quantizing the number corresponding to the first type identification information to be used as a second parameter value;
determining a third parameter value based on the second type identification information; quantizing the number corresponding to the second type identification information to be used as a third parameter value;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value; and sequentially arranging the first parameter value, the second parameter value and the third parameter value to form a mode determination vector.
Determining a generation mode of the voltage modulation control signal based on the mode determination vector and a preset mode determination library; the mode determination library is constructed by analyzing a large amount of data through a professional; for example: matching the mode determination vector with each identification vector in the mode determination library; extracting identification parameters of a generation mode of the voltage modulation control signal corresponding to the matched identification vector; determining a generation mode by identifying the parameters; the matching can adopt a mode of calculating the similarity, and the similarity calculation formula is as follows:
in the formula, an XS representation mode determines the similarity between a vector and an identification vector; f i Determining the ith data value of a vector for a mode；B i Identifying an ith data value of the vector for the mode; n is the total number of data in the vector, and at the moment, the value of n is 3; when the similarity is the maximum in the library, the two are determined to match. (ii) a
Based on the generation manner, a voltage modulation control signal is generated.
The working principle and the beneficial effects of the technical scheme are as follows:
the embodiment considers not only the output voltage and the battery voltage, but also the performance of the lithium battery pack and the performance of the converter; the performances of the converters and the lithium battery packs of the same type have certain same or similar performance, and the performances of the converters and the lithium battery packs can be respectively marked through the first type identification information and the second type identification information; the output voltage and the battery voltage represent the current instantaneous state of the lithium battery pack, and the performance of the lithium battery pack and the performance of the converter represent the charging change trend state; the determination of the generation mode is realized by comprehensively analyzing the current instantaneous state and the change trend state, so that the determination of the accurate generation mode is realized; voltage modulation is more refined, and the amplitude of instantaneous current is further reduced. Wherein, the first type identification information and the second type identification information can be inherent type codes set in advance; different codes represent different models of devices from different manufacturers.
The present invention also provides a charging control system, as shown in fig. 3, further including:
the acquisition module 1 is used for acquiring the current charging state of the lithium battery pack;
the determining module 2 is used for determining a voltage modulation control signal based on the current charging state;
and the modulation module 3 is used for controlling a voltage modulation module connected between the current-limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
In one embodiment, the obtaining module 1 obtains the current charging state of the lithium battery pack, and performs the following operations:
acquiring the battery voltage of the lithium battery pack;
the determining module 2 determines the voltage modulation control signal based on the current charging state, and performs the following operations:
preprocessing the battery voltage to obtain a marking voltage;
determining a generation mode of a voltage modulation control signal based on the marking voltage;
based on the generation manner, a voltage modulation control signal is generated.
In one embodiment, the determining module 2 determines the generation manner of the voltage modulation control signal based on the indication voltage, and performs the following operations:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are reduced in sequence; the duty ratios of the voltage modulation control signals generated through the first, second, third, fourth, and fifth modes are sequentially decreased.
In one embodiment, the obtaining module 1 obtains the current charging state of the lithium battery pack, and performs the following operations:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring an output voltage of the converter;
acquiring second type identification information of the converter;
and taking the battery voltage, the output voltage, the first type identification information and the second type identification information as the state data of the current charging state.
In one embodiment, the determining module 2 determines the voltage modulation control signal based on the current charging state, and performs the following operations:
calculating the difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference;
determining a second parameter value based on the first type identification information;
determining a third parameter value based on the second type identification information;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value;
determining a generation mode of the voltage modulation control signal based on the mode determination vector and a preset mode determination library;
based on the generation manner, a voltage modulation control signal is generated.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A charge control method, comprising:
acquiring the current charging state of the lithium battery pack;
determining a voltage modulation control signal based on the current state of charge;
and controlling a voltage modulation module connected between the current limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
2. The charge control method according to claim 1, wherein the obtaining the current charge state of the lithium battery pack comprises:
acquiring the battery voltage of the lithium battery pack;
said determining a voltage modulation control signal based on said current state of charge comprises:
preprocessing the battery voltage to obtain a marking voltage;
determining a generation mode of the voltage modulation control signal based on the marking voltage;
and generating the voltage modulation control signal based on the generation mode.
3. The charging control method according to claim 2, wherein the determining a generation manner of the voltage modulation control signal based on the index voltage includes:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
wherein the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are sequentially decreased; duty ratios of the voltage modulation control signals generated by the first mode, the second mode, the third mode, the fourth mode, and the fifth mode are sequentially decreased.
4. The charge control method according to claim 1, wherein the obtaining the current charge state of the lithium battery pack comprises:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring an output voltage of the converter;
acquiring second type identification information of the converter;
and using the battery voltage, the output voltage, the first type identification information and the second type identification information as the state data of the current charging state.
5. The charge control method of claim 4, wherein said determining a voltage modulation control signal based on said current state of charge comprises:
calculating a difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference;
determining a second parameter value based on the first type identification information;
determining a third parameter value based on the second type identification information;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value;
determining a generation mode of the voltage modulation control signal based on a mode determination vector and a preset mode determination library;
and generating the voltage modulation control signal based on the generation mode.
6. A charge control system, comprising:
the acquisition module is used for acquiring the current charging state of the lithium battery pack;
a determination module for determining a voltage modulation control signal based on the current state of charge;
and the modulation module is used for controlling the voltage modulation module connected between the current-limiting resistor and the converter to modulate the charging voltage loaded on the lithium battery pack based on the voltage modulation signal.
7. The charging control system of claim 6, wherein the obtaining module obtains a current charging state of the lithium battery pack and performs the following operations:
acquiring the battery voltage of the lithium battery pack;
the determination module determines a voltage modulation control signal based on the current state of charge, and performs the following operations:
preprocessing the battery voltage to obtain a marking voltage;
determining a generation mode of the voltage modulation control signal based on the marking voltage;
and generating the voltage modulation control signal based on the generation mode.
8. The charging control system of claim 7, wherein the determining module determines a manner of generating the voltage modulation control signal based on the indicator voltage, and performs:
when the marking voltage is greater than a preset first standard voltage, determining that the generation mode is a preset first mode;
when the marking voltage is less than or equal to the first standard voltage and greater than a preset second standard voltage, determining that the generation mode is a preset second mode;
when the marking voltage is less than or equal to the second standard voltage and greater than a preset third standard voltage, determining that the generation mode is a preset third mode;
when the marking voltage is less than or equal to the third standard voltage and greater than a preset fourth standard voltage, determining that the generation mode is a preset fourth mode;
when the marking voltage is less than or equal to the fourth standard voltage, determining that the generation mode is a preset fifth mode;
wherein the first standard voltage, the second standard voltage, the third standard voltage and the fourth standard voltage are sequentially decreased; the duty ratios of the voltage modulation control signals generated by the first mode, the second mode, the third mode, the fourth mode, and the fifth mode are sequentially decreased.
9. The charging control system of claim 6, wherein the obtaining module obtains a current charging state of the lithium battery pack and performs the following operations:
acquiring the battery voltage of the lithium battery pack;
acquiring first type identification information of a lithium battery pack;
acquiring the output voltage of the converter;
acquiring second type identification information of the converter;
and using the battery voltage, the output voltage, the first type identification information and the second type identification information as the state data of the current charging state.
10. The charge control system of claim 9, wherein the determination module determines a voltage modulation control signal based on the current state of charge by:
calculating a difference between the output voltage and the battery voltage;
determining a first parameter value based on the difference;
determining a second parameter value based on the first type identification information;
determining a third parameter value based on the second type identification information;
generating a mode determination vector based on the first parameter value, the second parameter value and the third parameter value;
determining a generation mode of the voltage modulation control signal based on a mode determination vector and a preset mode determination library;
and generating the voltage modulation control signal based on the generation mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020220084738A KR102480906B1 (en) | 2022-07-11 | 2022-07-11 | Apparatus for controlling pulse width modulation for pre-charge of battery pack |
| KR10-2022-0084738 | 2022-07-11 |
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| CN115411813A true CN115411813A (en) | 2022-11-29 |
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| CN202211047277.0A Pending CN115411813A (en) | 2022-07-11 | 2022-08-29 | Charging control method and system |
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| Country | Link |
|---|---|
| KR (1) | KR102480906B1 (en) |
| CN (1) | CN115411813A (en) |
| WO (1) | WO2024014642A1 (en) |
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| KR102480906B1 (en) * | 2022-07-11 | 2022-12-23 | (주)아이에이파워트론 | Apparatus for controlling pulse width modulation for pre-charge of battery pack |
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| US20150357849A1 (en) * | 2008-06-03 | 2015-12-10 | Intersil Americas LLC | Usb charger using sensor-less current limit |
| CN106972566A (en) * | 2017-04-11 | 2017-07-21 | 深圳市华星光电技术有限公司 | Battery charger and method for charging batteries |
| CN111114384A (en) * | 2020-02-27 | 2020-05-08 | 上海电机学院 | Charging control method for power lithium battery of electric automobile |
| CN112290646A (en) * | 2020-11-18 | 2021-01-29 | 江苏润石科技有限公司 | Lithium battery charging method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101499990B1 (en) * | 2009-03-19 | 2015-03-06 | 현대자동차주식회사 | circuit for initial charging a battery of a car |
| JP2013219964A (en) * | 2012-04-11 | 2013-10-24 | Hitachi Maxell Ltd | Battery pack with charge/discharge control switch |
| KR20170013670A (en) * | 2015-07-28 | 2017-02-07 | 엘에스산전 주식회사 | A control apparatus for precharging of high voltage battery for electric vehicle |
| KR102082380B1 (en) * | 2016-11-02 | 2020-02-28 | 주식회사 엘지화학 | Method and system for controling driving current of load |
| KR102474608B1 (en) | 2017-12-04 | 2022-12-06 | 현대자동차주식회사 | Power module using stack structure and 3 phase driving module for electric vehicle using the same |
| KR102480906B1 (en) * | 2022-07-11 | 2022-12-23 | (주)아이에이파워트론 | Apparatus for controlling pulse width modulation for pre-charge of battery pack |
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2022
- 2022-07-11 KR KR1020220084738A patent/KR102480906B1/en active IP Right Grant
- 2022-08-29 CN CN202211047277.0A patent/CN115411813A/en active Pending
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150357849A1 (en) * | 2008-06-03 | 2015-12-10 | Intersil Americas LLC | Usb charger using sensor-less current limit |
| CN106972566A (en) * | 2017-04-11 | 2017-07-21 | 深圳市华星光电技术有限公司 | Battery charger and method for charging batteries |
| CN111114384A (en) * | 2020-02-27 | 2020-05-08 | 上海电机学院 | Charging control method for power lithium battery of electric automobile |
| CN112290646A (en) * | 2020-11-18 | 2021-01-29 | 江苏润石科技有限公司 | Lithium battery charging method and device |
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| Publication number | Publication date |
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| KR102480906B1 (en) | 2022-12-23 |
| WO2024014642A1 (en) | 2024-01-18 |
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