[go: up one dir, main page]

CN118163663B - Super-power multi-voltage-range charging system, charging method and charging station - Google Patents

Super-power multi-voltage-range charging system, charging method and charging station Download PDF

Info

Publication number
CN118163663B
CN118163663B CN202410591516.1A CN202410591516A CN118163663B CN 118163663 B CN118163663 B CN 118163663B CN 202410591516 A CN202410591516 A CN 202410591516A CN 118163663 B CN118163663 B CN 118163663B
Authority
CN
China
Prior art keywords
charging
rectifying
filtering unit
power
power switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202410591516.1A
Other languages
Chinese (zh)
Other versions
CN118163663A (en
Inventor
吴加林
卢红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Jialing Zero Carbon Automotive Technology Co ltd
Original Assignee
Chengdu Jialing Zero Carbon Automotive Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Jialing Zero Carbon Automotive Technology Co ltd filed Critical Chengdu Jialing Zero Carbon Automotive Technology Co ltd
Priority to CN202410591516.1A priority Critical patent/CN118163663B/en
Publication of CN118163663A publication Critical patent/CN118163663A/en
Application granted granted Critical
Publication of CN118163663B publication Critical patent/CN118163663B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention provides an ultra-high power multi-voltage range charging system, a charging method and a charging station, wherein a main transformer is used for connecting at least one rectifying and filtering unit group, and each rectifying and filtering unit group comprises three rectifying and filtering units; each third rectifying and filtering unit can be connected with a plurality of charging piles to realize low-voltage charging energy supplementing; the two rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected to realize medium-voltage charging energy supplementing; the three rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected, and high-voltage charging energy supplementing is realized. Therefore, the same transformer can realize the charging and energy supplementing requirements of the electric automobile power battery packs with different voltage levels of low voltage, medium voltage and high voltage and different power levels.

Description

Super-power multi-voltage-range charging system, charging method and charging station
Technical Field
The embodiment of the invention relates to the technical field of new energy automobile charging equipment, in particular to an ultra-high power multi-voltage-range charging system, a charging method and a charging station.
Background
With the rapid development of technology, the traditional charging mode can not meet the rhythm requirements of modern life of people. The problem of energy supplementing and charging has become a major factor in impeding the popularization and development of electric automobiles.
The traditional charging mode has the prominent defects that: the voltage class of the charging facility is single, and the universality is poor. At present, various charging piles on the market are all 400V-500V in voltage level, are only suitable for current popular vehicle-mounted power battery packs, cannot be used for various vehicle types, and can be correctly supplemented only by searching for charging piles with proper brands before charging. The voltage class of the iterative vehicle-mounted power battery pack newly introduced in recent years is 800V-1000V, and a charging pile corresponding to energy supplementing cannot be found in the market. The vehicle-mounted battery pack of the heavy truck or the heavy traffic trolley is 1500V, and only a power conversion mode can be adopted.
Disclosure of Invention
Therefore, the embodiment of the invention provides an ultra-high power multi-voltage-range charging system, a charging method and a charging station, which are used for solving the technical problem that the traditional charging mode cannot meet the charging energy supplementing requirements of power battery packs with different voltage ranges and different power grades at the same time.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
According to a first aspect of an embodiment of the present application, an embodiment of the present application provides an ultra-high power multi-voltage range charging system, the charging system including: the system comprises a main transformer, at least one rectifying and filtering unit group, a first charging pile group, a second charging pile group and a third charging pile group;
The primary side and the secondary side of the main transformer are respectively connected with a charging power supply and at least one rectifying and filtering unit group, wherein each rectifying and filtering unit group comprises a first rectifying and filtering unit, a second rectifying and filtering unit and a third rectifying and filtering unit;
The positive DC bus and the negative DC bus of the first rectifying and filtering unit, the second rectifying and filtering unit and the third rectifying and filtering unit respectively form a first charging access end which is respectively corresponding to the first rectifying and filtering unit, and the first charging access end is used for accessing the first charging pile group;
The positive direct current bus of the first rectifying and filtering unit is connected with the negative direct current bus of the second rectifying and filtering unit in series, a second charging access end is formed by the positive direct current bus of the second rectifying and filtering unit and the negative direct current bus of the first rectifying and filtering unit, and the second charging access end is used for being connected with the second charging pile group;
The positive direct current bus of the second rectifying and filtering unit is connected with the negative direct current bus of the third rectifying and filtering unit in series, a third charging access end is formed by the positive direct current bus of the third rectifying and filtering unit and the negative direct current bus of the first rectifying and filtering unit, and the third charging access end is used for being connected with the third charging pile group.
Further, the first rectifying and filtering unit and the third rectifying and filtering unit are triangular alternating current-direct current rectifying and filtering units, and the second rectifying and filtering unit is a star-shaped alternating current-direct current rectifying and filtering unit.
Further, the first charging pile group comprises at least one first charging pile with a first preset charging voltage range; the second charging pile group comprises at least one second charging pile with a second preset charging voltage range; the third charging post set includes at least one third charging post having a third preset charging voltage range.
Further, the charging system further includes: a charge step-up/step-down control unit including: first filter capacitorFirst inductorFirst power switchSecond power switchFirst power diodeSecond power diodeFiltering and boosting energy storage capacitorAnd power battery energy storage bin; The first filter capacitorAnd the first inductorOne end of the positive direct current bus is sequentially connected with the first charging access end/the second charging access end/the third charging access end, and the first inductorForm a first connection point at the other end ofThe first connecting pointIs connected to the first power switchIs connected with the collector of the first power diodeAnode of the first power diodeForm a second connection point at the cathode end of (a)The second connection pointSequentially connected to the filtering and boosting energy storage capacitorPositive electrode of (a) and second power switchThe collector of the second power switchIs connected to the second power diodeIs arranged in the power battery energy storage binThe positive electrode of the power battery energy storage binForm a direct current positive electrode access terminal outside the positive electrode of (a)The negative DC bus of the first charging access end/the second charging access end/the third charging access end is sequentially connected with the first filter capacitorIs connected with the first power switchEmitter of (c), said filtering and boosting energy storage capacitorIs a negative electrode of the second power diodeThe anode of the power battery energy storage binIs connected with the negative electrode of the external battery and externally forms a direct current negative electrode access terminal。
Further, the first charging stake/the second charging stake/the third charging stake each include: second filter capacitorThird power switchFourth power switchFirst flywheel diodeSecond flywheel diodeSecond inductorAnd bypass power diodeThe second filter capacitorAnd the third power switchThe collector electrode of the capacitor is sequentially connected with the direct current anode access terminalThe third power switchThrough a third connection pointAnd the fourth power switchIs connected to the collector of the first inductorIs connected with one end of the first freewheeling diodeThe second flywheel diodeAnd the bypass power diodeRespectively with the third power switchThe fourth power switchAnd the second inductorIn parallel, the second inductorThrough the fourth connection pointWith waiting on-vehicle battery package of chargingThe positive electrode of the direct current negative electrode is connected with the direct current negative electrode access terminalSequentially connected with the second filter capacitorIs connected with the fourth power switchEmitter of (c) and vehicle-mounted battery pack to be chargedIs connected to the negative electrode of the battery.
Further, a fourth connection pointA high-speed Hall current sensor, a voltage sensor and a temperature sensor are connected.
According to a second aspect of the embodiment of the present application, the embodiment of the present application provides an ultra-high power multi-voltage range charging method, the charging method including:
connecting a charging power supply to the primary side by utilizing a main transformer, and connecting at least one rectifying and filtering unit group to the secondary side, wherein each rectifying and filtering unit group comprises a first rectifying and filtering unit, a second rectifying and filtering unit and a third rectifying and filtering unit;
The positive DC bus and the negative DC bus of the first rectifying and filtering unit, the second rectifying and filtering unit and the third rectifying and filtering unit respectively form a first charging access end which is respectively corresponding to the first rectifying and filtering unit, and the first charging access end is used for accessing the first charging pile group;
Connecting the positive DC bus of the first rectifying and filtering unit and the negative DC bus of the second rectifying and filtering unit in series, and forming a second charging access end by the positive DC bus of the second rectifying and filtering unit and the negative DC bus of the first rectifying and filtering unit, wherein the second charging access end is used for accessing the second charging pile group;
And connecting the positive DC bus of the second rectifying and filtering unit with the negative DC bus of the third rectifying and filtering unit in series, wherein a third charging access end is formed by the positive DC bus of the third rectifying and filtering unit and the negative DC bus of the first rectifying and filtering unit, and the third charging access end is used for being connected with the third charging pile group.
Further, the charging method further includes:
The step-up control and the step-down control of the output voltage are performed by a charge step-up/step-down control unit, which includes:
when the power battery stores energy storehouse When the voltage of the first power switch is lower than a preset threshold value, the first power switch is turned offAnd turn on the second power switchThe output voltage of the first charging access terminal/the second charging access terminal/the third charging access terminal passes through a first filter capacitorAfter filtering, the positive DC bus sequentially passes through a first inductorFirst power diodeThe second power switchIs connected to the power battery energy storage binThe positive electrode of the power battery energy storage binThe negative electrode of the power battery is connected to a negative electrode direct current bus to form a first charging loop as the energy storage bin of the power batteryCharging;
when the power battery stores energy storehouse When the voltage of the power supply is lower than the charging demand voltage, the first power switch is continuously controlled to be turned on and off for a plurality of timesThe power battery energy storage binExternally formed direct current positive electrode access terminalAnd a direct current negative electrode access terminalThe output voltage between the two is gradually increased; when the first power switch is turned onAnd when the first inductor is usedThe first power switchThe first power diodeFiltering and boosting energy storage capacitorA step-up chopper circuit is formed through a first filter capacitorThe filtered output voltage is added to the first inductorOn, make the first inductance flow throughThe current of (2) starts to rise and store energy, and at the same time, the filtering and boosting energy storage capacitorIs maintained constant; when the first power switch is turned offWhen flowing through the first inductorIs not abrupt, passes through the first power diodeContinuing to circulate and giving the filtering and boosting energy storage capacitorCharging, thereby making the power battery store energy binExternally formed direct current positive electrode access terminalAnd a direct current negative electrode access terminalThe output voltage between them rises;
Wherein the first power switch Is connected to the first inductorAnd the first power diodeFirst connection point betweenThe filtering and boosting energy storage capacitorIs connected to the first power diodeAnd the cathode end of the second power switchThe second connection point between the collectors of (a)The second power switchThe emitter of (a) is connected with a second power diodeThe cathode of the first power switchEmitter of (c), said filtering and boosting energy storage capacitorIs a negative electrode of the second power diodeIs connected to the negative dc bus.
Further, the first charging pile group comprises at least one first charging pile with a first preset charging voltage range; the second charging pile group comprises at least one second charging pile with a second preset charging voltage range; the third charging post set includes at least one third charging post having a third preset charging voltage range.
Further, the charging method further includes:
when the first charging pile/the second charging pile/the third charging pile is in charging operation, the second power switch is turned on And a third power switchThe power battery energy storage binIs discharged by the ultra-large current during the short time of the positive pole and flows through the second power switchThe output voltage after fusion is passed through a second filter capacitorFiltering, the direct current positive electrode access terminalSequentially through the third power switchSaid second inductorBypass power diode of (c)On-board battery pack connected to be chargedThe positive electrode of the vehicle-mounted battery pack to be chargedIs connected to the direct current negative electrode access terminalForming a second charging loop to be implemented as the vehicle-mounted battery pack to be chargedHigh-speed charging;
When the first charging pile/the second charging pile/the third charging pile discharges, the second power switch is turned on And turn off the third power switchThe vehicle-mounted battery pack to be chargedIs passed through the second inductorAfter being restrained and limited, one part of the current passes through a fourth power switchDirectly return to the vehicle-mounted battery pack to be chargedIs looped through the other part of the third power switchFirst freewheeling diode on bypassRecovering energy to the second filter capacitorCharging;
Wherein the second filter capacitor And the third power switchThe collector electrode of the capacitor is sequentially connected with the direct current anode access terminalThe third power switchThrough a third connection pointAnd the fourth power switchIs connected to the collector of the first inductorIs connected with one end of the first freewheeling diodeThe second flywheel diodeAnd the bypass power diodeRespectively with the third power switchThe fourth power switchAnd the second inductorIn parallel, the second inductorThrough the fourth connection pointWith waiting on-vehicle battery package of chargingThe positive electrode of the direct current negative electrode is connected with the direct current negative electrode access terminalSequentially connected with the second filter capacitorIs connected with the fourth power switchEmitter of (c) and vehicle-mounted battery pack to be chargedIs connected to the negative electrode of the battery.
According to a third aspect of embodiments of the present invention, there is provided a charging station comprising an ultra-high power multi-voltage range charging system as defined in any one of the above.
Compared with the prior art, the ultra-high power multi-voltage range charging system, the charging method and the charging station provided by the embodiment of the application are characterized in that at least one rectifying and filtering unit group is connected by utilizing one main transformer, and each rectifying and filtering unit group comprises three rectifying and filtering units; each third rectifying and filtering unit can be connected with a plurality of charging piles to realize low-voltage charging energy supplementing; the two rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected to realize medium-voltage charging energy supplementing; the three rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected, and high-voltage charging energy supplementing is realized. Therefore, the same transformer can realize the charging and energy supplementing requirements of the electric automobile power battery packs with different voltage levels of low voltage, medium voltage and high voltage and different power levels.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
Fig. 1 is a schematic diagram of a logic circuit of an ultra-high power multi-voltage range charging system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a logic circuit of a charging step-up/step-down control unit and a first charging pile of an ultra-high power multi-voltage range charging system according to an embodiment of the present invention;
fig. 3 is a logic schematic diagram of a high-speed charging intelligent control unit of an ultra-high power multi-voltage range charging system according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of implementing high-speed charging intelligent control in an ultra-high power multi-voltage range charging method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a vehicle-mounted battery pack to be charged in an ultra-high power multi-voltage range charging method according to an embodiment of the present invention A flow diagram of a pre-run phase is executed;
fig. 6 is a schematic flow chart of monitoring a battery aging state by using a real internal resistance present value r in the ultra-high power multi-voltage range charging method according to the embodiment of the present invention;
Fig. 7 is a schematic diagram of the vehicle-mounted battery pack to be charged in the method for charging ultra-high power and multiple voltage ranges according to the embodiment of the invention A flow diagram of the run phase is executed.
In the figure: 01. a main transformer; 02. a rectifying and filtering unit group; 03. a first charging pile group; 04. the second charging pile group; 05. a third charging pile group; 06. a charging power supply; 07. a charge step-up/step-down control unit; 08. a high-speed charging intelligent control unit; 1. a communication module; 2. a precharge module; 3. a monitoring module; 4. and a charging module.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. 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 application aims at: the power transformer is compatible with different voltage levels of high, medium and low, and meets the charging and energy supplementing requirements of power battery packs with different voltage ranges and different power levels.
In order to solve the above technical problems, as shown in fig. 1, an embodiment of the present application provides an ultra-high power multi-voltage range charging system, which includes: a main transformer 01, at least one rectifying and filtering unit group 02, a first charging pile group 03, a second charging pile group 04 and a third charging pile group 05.
The primary side of the main transformer 01 is connected with a charging power supply 06. At least one rectifying and filtering unit group 02 is connected to the secondary side of the main transformer 01, and as shown in fig. 1, one rectifying and filtering unit group 02 is connected to the secondary side of the main transformer 01. Each rectifying and filtering unit group 02 comprises a first rectifying and filtering unitSecond rectifying and filtering unitAnd a third rectifying and filtering unit. First rectifying and filtering unitAnd a third rectifying and filtering unitIs a triangle AC-DC rectifying and filtering unit, a second rectifying and filtering unitIs a star-shaped alternating current-direct current rectifying and filtering unit.
In the embodiment of the invention, the primary side of the main transformer is connected with a star-shaped structure (the three-phase alternating current power supply of the charging power supply 06 is of a star-shaped structure), so that the loss of a circuit can be reduced, the current of the circuit can be reduced, and the secondary side adopts a rectification circuit with the star-shaped structure and a triangle-shaped structure which coexist, thereby being beneficial to preventing harmonic waves from being transmitted to a system, weakening the harmonic waves to cause waveform distortion of the power grid voltage, and ensuring the power supply quality.
First rectifying and filtering unitSecond rectifying and filtering unitAnd a third rectifying and filtering unitAll form a direct current power supply with the output voltage of 500V, and the direct current power supply is formed by a first rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busSecond rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busAnd a third rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busRespectively forming a first charging access terminal corresponding to each other、AndThe first charging access terminal、AndFor accessing the first set of charging piles 03.
The first charging pile group comprises at least one first charging pile with a first preset charging voltage range, and the first preset charging voltage range can be 0-500V, so that the first charging piles are charging piles with low voltage of 500V, and all the first charging piles in each first charging pile group are mutually independent.
As shown in fig. 1, further, the first rectifying and filtering unitPositive electrode dc bus of (a)And a second rectifying and filtering unitNegative DC bus of (2)Series connection, first rectifying and filtering unitNegative DC bus of (2)Unchanged, by the second rectifying and filtering unitPositive electrode dc bus of (a)And a first rectifying and filtering unitNegative DC bus of (2)Forming a second charging access terminal, labeled as in fig. 1The second charging access terminalFor accessing the second set of charging piles 04.
The second charging pile group 04 includes at least one second charging pile having a second preset charging voltage range, and the second preset charging voltage range may be 0-1000V, so that the second charging piles are charging piles with medium voltage of 1000V, and each second charging pile in each second charging pile group 04 is also independent from each other.
In the embodiment of the present invention, any two rectifying and filtering units are connected in series to form a second charging access terminal, preferably any one triangular ac-dc rectifying and filtering unit and the star ac-dc rectifying and filtering unit form the second charging access terminal, only one of which is shown in fig. 1, and the other of which is the same as the connection combination described above, and will not be repeated.
As shown in fig. 1, further, in the first rectifying and filtering unitPositive electrode dc bus of (a)And a second rectifying and filtering unitNegative DC bus of (2)On the basis of series connection, a second rectifying and filtering unitPositive electrode dc bus of (a)And a third rectifying and filtering unitNegative DC bus of (2)Series connection, first rectifying and filtering unitNegative DC bus of (2)Third rectifying and filtering unitPositive electrode dc bus of (a)Unchanged, by a third rectifying and filtering unitPositive electrode dc bus of (a)And a first rectifying and filtering unitNegative DC bus of (2)Forming a third charging access terminal, labeled as in fig. 1Raising the third charging access terminalFor accessing the third set of charging piles 05.
The third charging pile group 05 includes at least one third charging pile having a third preset charging voltage range, and the second preset charging voltage range may be 0-1500V, so that the second charging piles are charging piles with medium voltage of 1500V, and each second charging pile in each third charging pile group 05 is also independent from each other.
In the embodiment of the invention, three groups of 500V direct current low-voltage loops are output after passing through a triangular alternating current-direct current rectifying and filtering unit or a star alternating current-direct current rectifying and filtering unit, and low-voltage direct current charging current is output to the outside; any two groups of 500V direct current low-voltage loops are connected in series to form a 1000V medium-voltage loop, and medium-voltage direct current charging current is output to the outside; three groups of 500V direct current low-voltage loops are connected in series according to the triangle alternating current-direct current rectifying and filtering unit, the star alternating current-direct current rectifying and filtering unit and the triangle alternating current-direct current rectifying and filtering unit to form a 1500V high-voltage loop, and high-voltage direct current charging current is output to the outside. Therefore, the energy supplementing requirements of different voltages and different powers can be met, the harmonic wave influence of a power grid can be reduced, and the quality of a power supply is improved.
Compared with the prior art, the ultra-high power multi-voltage range charging system provided by the embodiment of the application utilizes one main transformer to connect at least one rectifying and filtering unit group, and each rectifying and filtering unit group comprises three rectifying and filtering units; each third rectifying and filtering unit can be connected with a plurality of charging piles to realize low-voltage charging energy supplementing; the two rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected to realize medium-voltage charging energy supplementing; the three rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected, and high-voltage charging energy supplementing is realized. Therefore, the same transformer can realize the charging and energy supplementing requirements of the electric automobile power battery packs with different voltage levels of low voltage, medium voltage and high voltage and different power levels.
Referring to fig. 2, an ultra-high power multi-voltage range charging system disclosed in an embodiment of the present invention further includes: the charge step-up/step-down control unit 07.
In the embodiment of the present invention, the circuit principles of the charging step-up/step-down control unit 07 are the same regardless of the low-voltage circuit, the medium-voltage circuit, and the high-voltage circuit, and only the device selection specification and model parameters are different. Specifically, the charge step-up/step-down control unit 07 includes: first filter capacitorFirst inductorFirst power switchSecond power switchFirst power diodeSecond power diodeFiltering and boosting energy storage capacitorAnd power battery energy storage bin。
Power battery energy storage binThe charging power supply of the system can be from a power grid direct current power supply, and can also be any energy source, such as photovoltaic, wind power, wind-solar complementary power, a large energy storage system and the like. In the embodiment of the invention, a direct current power supply from a power grid is taken as an example temporarily.
First filter capacitorPositive electrode of (a) and first inductorPositive electrode DC bus with one end connected to the first charging access end, the second charging access end and the third charging access end in turnFirst inductorForm a first connection point at the other end ofFirst connection pointConnected to a first power switchCollector of (a) and first power diodeAnode of the first power diodeForm a second connection point at the cathode end of (a)Second connection pointSequentially connected to the filtering and boosting energy storage capacitorPositive electrode of (a) and second power switchCollector of (2), second power switchIs connected to the second power diodeIs provided with a cathode and a power battery energy storage binIs a positive electrode of a power battery energy storage binForm a direct current positive electrode access terminal outside the positive electrode of (a)Negative DC bus of first charging access end/second charging access end/third charging access endSequentially with the first filter capacitorIs a negative electrode, a first power switchEmitter, filter and boost storage capacitor of (C)Cathode of (a) second power diodeEnergy storage bin of anode and power battery of (a)Is connected with the negative electrode of the external battery and externally forms a direct current negative electrode access terminal。
Likewise, in the embodiment of the invention, the circuit principles of the connected charging piles are the same regardless of the low-voltage circuit, the medium-voltage circuit and the high-voltage circuit, and only the device selection specification and model parameters are different. Referring to fig. 2, the first charging pile/the second charging pile/the third charging pile each include: second filter capacitorThird power switchFourth power switchFirst flywheel diodeSecond flywheel diodeSecond inductorAnd bypass power diode。
Further, a second filter capacitorPositive electrode of (a) and third power switchThe collector electrode of the capacitor is sequentially connected with the direct current positive electrode access terminalThird power switchThrough a third connection pointAnd a fourth power switchCollector and second inductance of (2)Is connected with one end of a first flywheel diodeSecond flywheel diodeAnd bypass power diodeRespectively with a third power switchFourth power switchAnd a second inductanceParallel connection, a second inductanceThrough the fourth connection pointWith waiting on-vehicle battery package of chargingIs connected with the positive pole of the direct current negative pole access terminalSequentially with a second filter capacitorNegative pole, fourth power switch of (2)Emitter of (c) and vehicle-mounted battery pack to be chargedIs connected to the negative electrode of the battery.
In the embodiment of the present invention, referring to fig. 2, when the same dc positive electrode access terminal is described aboveAnd a direct current negative electrode access terminalWhen a plurality of first charging piles/second charging piles/third charging piles are connected at the same time, the plurality of first charging piles/second charging piles/third charging piles can share a second filter capacitor。
Preferably, the fourth connection pointA high-speed Hall current sensor, a voltage sensor and a temperature sensor are connected.
In addition, the embodiment of the application also provides a charging station, which comprises the super-power multi-voltage-range charging system.
In the embodiment of the present invention, as described above, the actual distribution of the charging station is similar to the current filling station layout, for example, the filling station layout may be: adding 92 # gasoline into the 1-3 piles of the A area, adding 95 # gasoline into the 1-3 piles of the B area, and adding 98 # gasoline into the 1-3 piles of the C area. Likewise, in the embodiment of the present invention, a first charging pile for low-voltage energy compensation may be disposed in the area a, a second charging pile for medium-voltage energy compensation may be disposed in the area B, and a third charging pile for high-voltage energy compensation may be disposed in the area C.
Under the unattended condition, if an old electric automobile with 500V is stopped in the zone B of the second charging pile with medium-voltage energy supplementing, the charging gun can be immediately identified as being out of alignment and is not started after being connected, and the old electric automobile is prompted to be replaced in the zone A of the first charging pile with low-voltage energy supplementing. Otherwise, if the novel 800V electric automobile stops to the area A of the first charging pile with low-voltage energy compensation, the charging gun is immediately identified as being out of alignment after being connected, and the charging gun is not started, and the charging gun is prompted to be replaced to the area B of the second charging pile with medium-voltage energy compensation.
Corresponding to the above disclosed ultra-high power multi-voltage range charging system, the embodiment of the invention also discloses an ultra-high power multi-voltage range charging method. The following describes in detail an ultra-high power multi-voltage range charging method disclosed in the embodiment of the invention in connection with an ultra-high power multi-voltage range charging system described above.
Referring to fig. 1, specific steps of a method for charging in a super-power multi-voltage range according to an embodiment of the present application are described in detail below.
With the main transformer 01, a charging source 06 is connected on the primary side and at least one rectifying and filtering unit group 02 is connected on the secondary side.
As shown in fig. 1, a rectifying and filtering unit group 02 is connected to the secondary side of the main transformer 01. The rectifying and filtering unit group 02 comprises a first rectifying and filtering unitSecond rectifying and filtering unitAnd a third rectifying and filtering unit. First rectifying and filtering unitAnd a third rectifying and filtering unitIs a triangle AC-DC rectifying and filtering unit, a second rectifying and filtering unitIs a star-shaped alternating current-direct current rectifying and filtering unit.
In the embodiment of the invention, the primary side of the main transformer is connected with a star-shaped structure (the three-phase alternating current power supply of the charging power supply 06 is of a star-shaped structure), so that the loss of a circuit can be reduced, the current of the circuit can be reduced, and the secondary side adopts a rectification circuit with the star-shaped structure and a triangle-shaped structure which coexist, thereby being beneficial to preventing harmonic waves from being transmitted to a system, weakening the harmonic waves to cause waveform distortion of the power grid voltage, and ensuring the power supply quality.
First rectifying and filtering unitSecond rectifying and filtering unitAnd a third rectifying and filtering unitA dc power supply with an output voltage of 500V was formed. From a first rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busSecond rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busAnd a third rectifying and filtering unitPositive electrode dc bus of (a)And negative electrode direct current busRespectively forming a first charging access terminal corresponding to each other、AndThe first charging access terminal、AndFor accessing the first set of charging piles 03.
The first charging pile group comprises at least one first charging pile with a first preset charging voltage range, and the first preset charging voltage range can be 0-500V, so that the first charging piles are charging piles with low voltage of 500V, and all the first charging piles in each first charging pile group are mutually independent.
As shown in fig. 1, further, the first rectifying and filtering unitPositive electrode dc bus of (a)And a second rectifying and filtering unitNegative DC bus of (2)Series connection, first rectifying and filtering unitNegative DC bus of (2)Unchanged, by the second rectifying and filtering unitPositive electrode dc bus of (a)And a first rectifying and filtering unitNegative DC bus of (2)Forming a second charging access terminal, labeled as in fig. 1The second charging access terminalFor accessing the second set of charging piles 04.
The second charging pile group 04 includes at least one second charging pile having a second preset charging voltage range, and the second preset charging voltage range may be 0-1000V, so that the second charging piles are charging piles with medium voltage of 1000V, and each second charging pile in each second charging pile group 04 is also independent from each other.
In the embodiment of the present invention, any two rectifying and filtering units are connected in series to form a second charging access terminal, preferably any one triangular ac-dc rectifying and filtering unit and the star ac-dc rectifying and filtering unit form the second charging access terminal, only one of which is shown in fig. 1, and the other of which is the same as the connection combination described above, and will not be repeated.
As shown in fig. 1, further, in the first rectifying and filtering unitPositive electrode dc bus of (a)And a second rectifying and filtering unitNegative DC bus of (2)On the basis of series connection, a second rectifying and filtering unitPositive electrode dc bus of (a)And a third rectifying and filtering unitNegative DC bus of (2)Series connection, first rectifying and filtering unitNegative DC bus of (2)Third rectifying and filtering unitPositive electrode dc bus of (a)Unchanged, by a third rectifying and filtering unitPositive electrode dc bus of (a)And a first rectifying and filtering unitNegative DC bus of (2)Forming a third charging access terminal, labeled as in fig. 1Raising the third charging access terminalFor accessing the third set of charging piles 05.
The third charging pile group 05 includes at least one third charging pile having a third preset charging voltage range, and the second preset charging voltage range may be 0-1500V, so that the second charging piles are charging piles with medium voltage of 1500V, and each second charging pile in each third charging pile group 05 is also independent from each other.
In the embodiment of the invention, three groups of 500V direct current low-voltage loops are output after passing through a triangular alternating current-direct current rectifying and filtering unit or a star alternating current-direct current rectifying and filtering unit, and low-voltage direct current charging current is output to the outside; any two groups of 500V direct current low-voltage loops are connected in series to form a 1000V medium-voltage loop, and medium-voltage direct current charging current is output to the outside; three groups of 500V direct current low-voltage loops are connected in series according to the triangle alternating current-direct current rectifying and filtering unit, the star alternating current-direct current rectifying and filtering unit and the triangle alternating current-direct current rectifying and filtering unit to form a 1500V high-voltage loop, and high-voltage direct current charging current is output to the outside. Therefore, the energy supplementing requirements of different voltages and different powers can be met, the harmonic wave influence of a power grid can be reduced, and the quality of a power supply is improved.
Compared with the prior art, the ultra-high power multi-voltage range charging system provided by the embodiment of the application utilizes one main transformer to connect at least one rectifying and filtering unit group, and each rectifying and filtering unit group comprises three rectifying and filtering units; each third rectifying and filtering unit can be connected with a plurality of charging piles to realize low-voltage charging energy supplementing; the two rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected to realize medium-voltage charging energy supplementing; the three rectifying and filtering units are connected in series, so that a plurality of charging piles can be connected, and high-voltage charging energy supplementing is realized. Therefore, the same transformer can realize the charging and energy supplementing requirements of the electric automobile power battery packs with different voltage levels of low voltage, medium voltage and high voltage and different power levels.
The embodiment of the invention discloses a method for charging super-power and multiple voltage ranges, which further comprises the following steps: the output voltage is subjected to step-up control and step-down control by a charge step-up/step-down control unit 07.
Referring to fig. 2, the above-described step-up control and step-down control specifically include: when the power battery stores energy storehouseWhen the voltage of the first power switch is lower than a preset threshold value, the first power switch is turned offAnd turn on the second power switch. The output voltage of the first charging access terminal/the second charging access terminal/the third charging access terminal passes through the first filter capacitorAfter filtering, the positive electrode direct current bus is usedSequentially pass through a first inductorFirst power diodeSecond power switchIs connected to the energy storage bin of the power batteryIs a positive electrode of a power battery energy storage binIs connected to the negative DC busForming a first charging loop as a power battery energy storage binAnd (5) charging.
Referring to fig. 2, the above-described step-up control and step-down control further include: when the power battery stores energy storehouseWhen the voltage of the power supply is lower than the charging demand voltage, the first power switch is continuously controlled to be turned on and off for a plurality of timesMake the power battery store energy storehouseExternally formed direct current positive electrode access terminalAnd a direct current negative electrode access terminalThe output voltage between them increases gradually.
In particular, when the first power switch is turned onWhen it is formed from first inductorFirst power switchFirst power diodeFiltering and boosting energy storage capacitorA step-up chopper circuit is formed through a first filter capacitorThe filtered output voltage is applied to the first inductorOn the first inductorThe current of (a) starts to rise and store energy, and meanwhile, the filtering and boosting energy storage capacitorIs maintained constant. When the first power switch is turned offWhen flowing through the first inductorIs not abrupt, passes through the first power diodeContinuing to circulate and giving filtering and boosting energy storage capacitorCharging, thereby making the power battery store energy binExternally formed direct current positive electrode access terminalAnd a direct current negative electrode access terminalThe output voltage between them rises.
In order to realize the step-up control and the step-down control, a first power switchIs connected to the first inductorAnd a first power diodeFirst connection point betweenFiltering and boosting energy storage capacitorIs connected to the first power diodeCathode terminal of (a) and a second power switchThe second connection point between the collectors of (a)Second power switchThe emitter of (a) is connected with a second power diodeCathode of the first power switchEmitter, filter and boost storage capacitor of (C)Cathode of (a) second power diodeIs connected to the negative dc bus.
The key point of the boost chopper circuit is that the first inductorAnd a first power diodeIs a combination of the above. When the first power switchWhen conducting, the first inductorStoring energy; when the first power switchWhen turned off, the first inductorReleasing energy pushing the voltage to a higher level. This "chopping-boosting" process continues such that the output voltage is stepped up. The on time and the off time of the switching tube are intelligently controlled and adjusted, so that the output voltage can be controlled. For example: one pulse cycle is 3 ms, and 1 ms is conducted, so that a chopping small current can be provided to raise the direct current positive electrode access terminalAnd a direct current negative electrode access terminalAn output voltage therebetween. So the first power switchThe function of (1) is to control the chopper boost circuit to work, the second power switchThe function of (2) is to control the operation of the step-down circuit. Therefore, enough output voltage and enough output current can be provided in a wide range, and the energy supplementing requirement of the rechargeable battery pack is met.
In the embodiment of the invention, a power battery energy storage bin is arrangedAs an intelligent energy storage power supply and an energy buffer pool. Power battery energy storage binThe charging station is formed by connecting a plurality of groups of power battery packs in series and parallel according to the actual requirement of the charging station. Power battery energy storage binThe power battery is a high-power direct-current power supply, the capacity of the power supply of the power grid can be supplemented, the capacity of 10 times or several times of rated power of the power battery can be fully utilized by the short-time discharge peak power output value of the power battery, the requirement of real-time intelligent high-speed charging on the short-time ultra-large current density can be met, and the problems of power grid fluctuation and interference caused by ultra-large current during high-speed charging can be reduced.
As described above, in the embodiment of the present invention, the on-off control of each group of the low-voltage circuit corresponding to the first charging pile, the medium-voltage circuit corresponding to the second charging pile, and the high-voltage circuit corresponding to the third charging pile and the main circuit is performed by the second power switch in the charging step-up/step-down control unit 07And (5) controlling. In general, when more than one of the first charging pile, the second charging pile and the third charging pile is in a charging/discharging working state, the second power switchWill conduct.
In addition, because of the step-up control and the step-down control, the first charging pile connected with the 500V direct-current low-voltage loop can be intelligently adjusted in the low-voltage range of 200V-700V, and the vehicle-mounted battery pack is applicable to old models and compatible with various vehicle-mounted battery packs of electric vehicles which are widely used. Any two groups of 500V direct current low-voltage loops are connected in series to form a second charging pile connected with a 1000V medium-voltage loop, the second charging pile can be intelligently adjusted within the range of 700V-1500V of medium voltage, and the novel iterative vehicle-mounted battery pack of the electric vehicle with the voltage of 800V or more is suitable. The three groups of 500V direct current low-voltage loops are connected with a third charging pile according to a 1500V high-voltage loop formed by connecting a triangle alternating current-direct current rectifying and filtering unit, a star alternating current-direct current rectifying and filtering unit and a triangle alternating current-direct current rectifying and filtering unit in series, can be intelligently adjusted within the range of 1200V-3000V of high voltage, and is suitable for the energy supplementing requirement of a 1500V heavy truck or a large passenger vehicle. Therefore, one set of system can meet the old model, can also consider the new iteration model, and can also facilitate the energy supplementing requirement of the oversized vehicle.
Referring to fig. 3, the ultra-high power multi-voltage range charging system provided by the embodiment of the invention further includes: the high-speed charging intelligent control unit 08, the high-speed charging intelligent control unit 08 specifically includes: a communication module 1, a pre-charging module 2, a monitoring module 3 and a charging module 4.
Further, the communication module 1 is configured to obtain a vehicle-mounted battery pack to be chargedIs set, the initial information of (a) and a predetermined charging target value; the pre-charging module 2 is configured to charge the vehicle-mounted battery pack to be charged based on a preset first pulse control signal having a first preset periodExecuting a pre-run phase; the monitoring module 3 is used for detecting a vehicle-mounted battery pack to be chargedThe actual internal resistance present value r of (2) and the first state of charge present value of each execution cycle of the pre-run phase; Monitoring the aging state of the battery by using the actual internal resistance present value r; the charging module 4 is configured to charge the vehicle-mounted battery pack based on a second pulse control signal having a second preset periodThe run phase is performed.
In addition, the monitoring module 3 is further configured to perform the following steps: detecting each execution period of operation stage to be charged vehicle-mounted battery packIs a second state of charge present value; Judging the second state of charge present value of the current execution periodWhether a predetermined charging target value is reached; if the second state of charge of the current execution cycle is presentIf the predetermined charging target value is not reached, the second state of charge present value of the current execution period is utilizedAnd predicting a charging current theoretical value and a charging pulse width corresponding to the next execution period, otherwise stopping executing the circulating step of the operation stage.
Through the high-speed charging intelligent control unit, parameters of the vehicle-mounted battery pack, such as static no-load voltage and the like, are accurately detected on line, the current value of the SOC of the charge degree is calculated and optimized, the charge/discharge duration and intensity are controlled in a self-adaptive intelligent mode, the charging current and the charging power are improved, and therefore the high-speed charging capability is improved.
Referring to fig. 4, corresponding to the above disclosed ultra-high power multi-voltage range charging system, the method for ultra-high power multi-voltage range charging according to the embodiment of the invention further includes the following steps.
Acquiring a vehicle-mounted battery pack to be charged by the communication module 1Is set, the initial information of (a) and a predetermined charging target value.
Each electric automobile is provided with a Battery management system BMS (Battery MANAGEMENT SYSTEM), and after the charging gun is connected to detect that the voltage level is correct, the electric automobile handshakes with the Battery management system BMS of the energy supplementing vehicle to obtain a vehicle-mounted Battery pack to be chargedThe initial information is mainly a factory main index value, and specifically comprises the following steps: the battery pack type, the number of charge/discharge multiplying power, the rated capacity value, the current value of the residual capacity, the rated voltage, the charging limiting voltage, the internal resistance value, the allowable direct current charging current value of the battery pack when the number of charge multiplying power is 1C and the working temperature.
Among them, the battery pack model is mainly used to determine different types of batteries, for example, ternary lithium batteries. The charge/discharge magnification number NC is the number of permitted charge/discharge magnifications of the battery, such as 4 magnifications (4C), 6 magnifications (6C), and the like. The nominal volume value is in kilowatt-hours, for example, 100kWh. The nominal voltage is in units of volts, such as 330V, 660V, etc. The charge limit voltage is a full charge limit voltage value, for example, calculated as the product of 4.2V and the number of series batteries. The internal resistance value may be a single battery factory parameter value in milliohms; the internal resistance total value after initial series and parallel calculation can also be different in number of batteries in battery packs of different whole vehicle manufacturers and in series and parallel combination modes. The operating temperature is a suitable operating temperature, for example, 15-45 ℃.
In the embodiment of the present invention, the charging energy supplementing demand target value of the user at this time, that is, how much kw the charging energy is needed for the energy supplementing charging at this time is confirmed by using the predetermined charging target value? Or how much of the battery is charged? Or how much charge is charged this time? The State of Charge (SOC) value converted into a corresponding SOC (State of Charge, refer to the available State of Charge of the Charge remaining in the battery) is used as the energy replenishment target value, that is, the predetermined Charge target value.
The pre-charging module 2 is used for charging the vehicle-mounted battery pack based on a preset first pulse control signal with a first preset periodA pre-run phase is performed.
Referring to fig. 5, the vehicle-mounted battery pack to be charged is as described aboveThe execution of the pre-run phase specifically comprises the following steps: vehicle-mounted battery pack to be charged according to preset first positive pulse signalsCharging; detecting to-be-charged vehicle-mounted battery packA first charging current during charging; controlling the vehicle-mounted battery pack to be charged according to a preset first negative pulse signalDischarging; stopping the vehicle-mounted battery pack to be charged in the first rest periodCharging and discharging are carried out; detecting to-be-charged vehicle-mounted battery packIs set to a first static no-load voltage; recording the current execution cycle number of the pre-running pulse control signal; judging whether the current execution cycle number reaches a first preset threshold value or not; if the current execution cycle number does not reach the first preset threshold value, cycling to the next execution cycle; if the current execution cycle number reaches a first preset threshold, the pre-operation stage loop step ends. In an embodiment of the present invention, the first preset threshold is greater than or equal to 8 and less than or equal to 20.
The monitoring module 3 detects the actual internal resistance present value r of the vehicle-mounted battery pack E N to be charged and the first state of charge present value of each execution period in the pre-operation stage。
Specifically, when the actual internal resistance present value r is detected, a first charging current and a first static idle voltage detected in the last execution period are taken as an initial charging current and an initial static idle voltage respectively; calculating a real internal resistance present value r by using the initial charging current and the initial static idle voltage, wherein a first calculation formula of the real internal resistance present value r is as follows:
Wherein, In order to initiate the charging current,To initiate a static no-load voltage.
Proved by numerous practical tests, the no-load voltage value measured by connecting the battery Bao Gang with the charging pile is inaccurate. Therefore, in the embodiment of the invention, the intelligent feedback control is firstly implemented to pre-run the charge-discharge pulse (the first pulse control signal) for a plurality of periods, then the first static idle voltage detected in the last execution period is taken as the initial static idle voltage, the first static idle voltage obtained at the moment is less influenced by the polarization voltage, the idle voltage is equal to the electromotive force of the battery pack at the moment, and the actual internal resistance r present value of the battery pack can be calculated according to the electromotive force and the current value during charging.
The battery state of charge SOC refers to the remaining capacity of the battery, and is the ratio of the remaining capacity of the battery to the rated capacity, generally expressed as a percentage, and the value range is 0-100%. When (when)When this is the case, the battery is completely discharged. When (when)When the battery is fully charged. If the accurate SOC value is not available, the battery is easy to overcharge or overdischarge, and the service life of the battery is seriously affected. Efficient operation of the battery can be ensured by SOC threshold management and estimation, so SOC threshold management is the core operation of battery management.
Specifically, the present value of the first state of charge of each execution period of the pre-operation stage is detectedCalculating the first state of charge present value of each execution period in the pre-run stage by using each first charging currentFirst state of charge present valueThe second calculation formula of (2) is:
Wherein, For the first state of charge present value of the nth execution period of the pre-run phase,For the first state of charge present value of the n-1 th execution cycle of the pre-run phase,For the first initial value of the state of charge,For the first charging current of the n-th execution cycle of the pre-run phase,For a first charge current duration of the n-th execution period of the pre-run phase,Vehicle-mounted battery pack to be chargedThe present value of the remaining capacity before execution of the pre-run phase,Vehicle-mounted battery pack to be chargedIs a nominal capacity value of (2).
In the embodiment of the invention, the estimation of the SOC value adopts a time integration method, namely, the current charged into the battery pack is integrated with time, and the residual electric quantity in the battery at a certain moment can be obtained according to the SOC value at the initial moment of the battery. Because the steps of the pre-operation stage are repeatedly executed, the cyclic detection can eliminate errors caused by current sampling precision and sampling period, and no accumulated errors exist.
The monitoring module 3 monitors the aging state of the battery by using the actual internal resistance present value r.
Referring to fig. 6, the steps specifically include: judging whether the actual internal resistance present value r exceeds a second preset threshold value; if the actual internal resistance present value r does not exceed the second preset threshold value, the vehicle-mounted battery pack to be charged is not neededPerforming depolarization repair; if the actual internal resistance present value r exceeds the second preset threshold value, judging whether the actual internal resistance present value r exceeds a third preset threshold value; if the actual internal resistance present value r does not exceed the third preset threshold value, increasing the pulse width and the frequency number of the negative pulse signals, and carrying out vehicle-mounted battery pack to be chargedPerforming depolarization repair; if the actual internal resistance present value r exceeds the third preset threshold value, judging whether the actual internal resistance present value r exceeds a fourth preset threshold value; if the actual internal resistance present value r does not exceed the fourth preset threshold value, the strong negative pulse signal is utilized to treat the vehicle-mounted battery pack to be chargedPerforming depolarization repair; if the actual internal resistance present value r exceeds a fourth preset threshold value, prompting the vehicle-mounted battery pack to be chargedSpecial cell depolarization repairs are required.
The internal resistance of the battery is the basis for judging the state of health SOH (state of health) of the battery, the internal resistance of the new battery is generally 12 milliohms to 13 milliohms, and when the internal resistance reaches about 100 milliohms, the battery is aged, and the battery is polarized seriously more than 120 milliohms. When the internal resistance reaches 200 milliohms, the battery is basically up to the scrappage level, and special depolarization repair of the battery is needed, and depolarization activated ions can be reused. Therefore, in the embodiment of the present invention, the second preset threshold may be set to 100 milliohms, the second preset threshold may be set to 120 milliohms, and the second preset threshold may be set to 200 milliohms.
The charging module 4 is used for charging the vehicle-mounted battery pack based on a second pulse control signal with a second preset periodThe run phase is performed.
Referring to fig. 7, the vehicle-mounted battery pack to be charged is as described aboveThe execution operation phase specifically comprises the following steps: vehicle-mounted battery pack to be charged according to second positive pulse signalsCharging; detecting to-be-charged vehicle-mounted battery packA second charging current during charging; controlling the vehicle-mounted battery pack to be charged according to the second negative pulse signalDischarging; stopping charging the vehicle-mounted battery pack in the second rest periodCharging and discharging are carried out; detecting to-be-charged vehicle-mounted battery packIs set in the first mode.
Referring to fig. 2, the vehicle-mounted battery pack to be charged is not limited to the aboveIn the pre-running stage, the vehicle-mounted battery pack to be charged is also in the above-mentioned modeIn the execution operation stage, when the first charging pile/the second charging pile/the third charging pile are in charging operation, the second power switch is turned onAnd a third power switchPower battery energy storage binThe positive electrode of the second power switch discharges and flows through the second power switchThe output voltage after fusion is passed through a second filter capacitorFiltering by DC positive electrode access terminalSequentially through a third power switchSecond inductorBypass power diode of (c)On-board battery pack connected to be chargedIs to be charged, and is to be chargedIs connected to the direct current negative electrode access terminalForming a second charging loop to be implemented as a vehicle-mounted battery pack to be chargedAnd (5) high-speed charging. At this time, the instantaneous voltage peak generated by the large-current charge is not transmitted to the power grid, and thus the power grid is in a normal steady operation state.
Referring to fig. 2, similarly, whether the vehicle-mounted battery pack to be charged is described aboveIn the pre-running stage, the vehicle-mounted battery pack to be charged is also in the above-mentioned modeIn the execution operation stage, when the first charging pile/the second charging pile/the third charging pile are in discharge operation, the second power switch is turned onAnd turn off the third power switchVehicle-mounted battery pack to be chargedIs passed through a second inductorAfter being restrained and limited, one part of the current passes through a fourth power switchDirectly return to the vehicle battery pack to be chargedThe negative pole of (2) completes the loop, another part passes through the third power switchFirst freewheeling diode on bypassRecovering energy to the second filter capacitorAnd (5) charging.
In the traditional method, the current limiting of the resistor is adopted for discharging the vehicle-mounted battery pack, and the current limiting of the inductor is adopted in the embodiment of the invention, so that the energy stored in the inductor during discharging the vehicle-mounted battery pack is returned to the energy storage filter capacitor, and the energy loss is reduced.
In order to realize the charge/discharge operation of the first charge pile, the second charge pile and the third charge pile, the second filter capacitorPositive electrode of (a) and third power switchThe collector electrodes of the capacitor are sequentially connected with the direct current positive electrode access terminalThird power switchThrough a third connection pointAnd a fourth power switchCollector and second inductance of (2)Is connected with one end of a first flywheel diodeSecond flywheel diodeAnd bypass power diodeRespectively with a third power switchFourth power switchAnd a second inductanceParallel connection, a second inductanceThrough the fourth connection pointWith waiting on-vehicle battery package of chargingIs connected with the positive pole of the direct current negative pole access terminalSequentially with a second filter capacitorNegative pole, fourth power switch of (2)Emitter of (c) and vehicle-mounted battery pack to be chargedIs connected to the negative electrode of the battery.
The monitoring module 3 detects the vehicle-mounted battery pack to be charged in each execution period of the operation stageIs a second state of charge present value。
Further, calculating the vehicle-mounted battery pack to be charged by using the second charging current and the second static no-load voltage of the current execution periodThe third calculation formula of the internal resistance monitoring value R is:
Wherein, For the third charging current of the n-th execution period of the run phase,A second static no-load voltage for the nth execution period of the run phase.
In the same way, the monitoring module 3 always monitors the battery aging state by using the actual internal resistance present value r in the circulating execution process of the operation stage. The specific monitoring step is the same as the step of monitoring the battery aging state by using the actual internal resistance present value r in the cyclic execution process of the pre-operation stage, and is not described herein.
Calculating a second state of charge present value for the current execution period using the respective second charging currents currently detectedSecond state of charge present valueThe second calculation formula of (2) is:
；
Wherein, For the second state of charge present value of the nth execution period of the run phase,For the second state of charge present value of the n-1 th execution cycle of the run phase,The second state of charge initial value is taken as the first state of charge present value of the last execution period of the pre-run stage,For the second charging current of the n-th execution period of the run phase,The second charging current duration for the nth execution period of the run phase.
The second state of charge present value of the current execution period is judged by the monitoring module 3Whether a predetermined charging target value is reached.
If the second state of charge of the current execution cycle is presentIf the predetermined charging target value is not reached, the second state of charge present value of the current execution period is utilizedAnd predicting a charging current theoretical value corresponding to the next execution period and a charging pulse width.
Specifically, the prediction formula of the charging current theoretical value and the charging pulse width is:
Wherein, For the theoretical value of the charging current corresponding to the next execution period,For the DC charging current value allowed by the battery pack when the charging rate number is 1C, NC is the charging rate number,And for the charging pulse width corresponding to the next execution period, T is a second preset period.
If the second state of charge of the current execution cycle is presentAnd stopping executing the circulating step of the operation phase when the preset charging target value is reached.
In the embodiment of the invention, a chopper control current technology is adopted, and the purpose of controlling the effective value of the charging current is achieved by controlling the charging pulse width.
Specifically, the SOC is used as an independent variable, and the vehicle-mounted battery pack to be charged is providedThe second preset period of execution of the run phase remains unchanged. If the pulse period width of the second pulse control signal is constant at 20ms, the single positive pulse width of charging is 18ms when charging is started, namely the positive pulse width of the second positive pulse signal is 18ms; the negative pulse width of the second negative pulse signal is 1ms immediately after a narrow negative pulse, so that weak polarization voltage generated just is eliminated, positive and negative ions are easier to enter the negative positive plate due to no influence of the polarization voltage, the charging speed is improved, and the efficiency is improved, so that heating is reduced. Detecting the second static no-load voltage after discharge depolarization for 1ms, and calculating the current value of the second state of charge. And with the second state of charge present valueGradually increasing, the pulse period of the second pulse control signal is still 20ms, and the charging pulse width is narrowed, for example, according to the prediction result of the prediction formula of the charging pulse width, the single charging pulse width is 16ms, that is, the positive pulse width of the second positive pulse signal is 16ms; a negative pulse is followed by a negative pulse of 1ms, namely the negative pulse width of the second negative pulse signal is 1ms; and then pauses for 3ms.
In actual operation, the second preset period T of the second pulse control signal is intelligently calculated and determined according to the comprehensive state of the battery, and is commonly usedIs unchanged. The charging pulse width in the period is calculated according to the prediction formula, so that the effective values of the second static no-load voltage and the second charging current are detected in real time, and the present value of the second state of charge is calculated. The calculated second state of charge present valueLogically comparing with a predetermined charge target value if the second state of charge present value of the current execution cycleThe preset charging target value is not reached, and the charging is continued in a loop; otherwise, stopping executing the loop step of the operation phase.
The charging, discharging and stopping detection rules are followed in the whole charging process cycle, the charging and discharging of the positive and negative pulses are controlled by intelligent feedback, and the effect of polarized voltage is basically avoided. Therefore, the charging current with the multiplying power larger than the permitted multiplying power of the battery pack can be adopted according to the charging current theoretical value prediction formula, if the permitted multiplying power of the battery is 4C, the charging current can be pulse charged with the multiplying power of about 8C, and the charging current multiplying power adjustment can be completed by adjusting the positive pulse width of the charging current.
From the principle diagram of the charging pile, increasing the charging current multiplying power is the intelligent feedback control of the third power switchThe number of positive pulses can be increased by reducing the pulse width of the positive pulse charge by a little, so that the charging current is increased. The charging, discharging, stopping and detecting at the operation stage are fast circulated, so that the charging at the stage can be completed within about 3 minutes, the charging speed is increased, meanwhile, the hidden heating trouble is reduced, and the efficiency is improved.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in a combination of hardware and software. When the software is applied, the corresponding functions may be stored in a computer-readable medium or transmitted as one or more instructions or code on the computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims (8)

1. An ultra-high power multi-voltage range charging system, the charging system comprising: the system comprises a main transformer, at least one rectifying and filtering unit group, a first charging pile group, a second charging pile group and a third charging pile group;
The primary side and the secondary side of the main transformer are respectively connected with a charging power supply and at least one rectifying and filtering unit group, wherein each rectifying and filtering unit group comprises a first rectifying and filtering unit, a second rectifying and filtering unit and a third rectifying and filtering unit;
The positive DC bus and the negative DC bus of the first rectifying and filtering unit, the second rectifying and filtering unit and the third rectifying and filtering unit respectively form a first charging access end which is respectively corresponding to the first rectifying and filtering unit, and the first charging access end is used for accessing the first charging pile group;
The positive direct current bus of the first rectifying and filtering unit is connected with the negative direct current bus of the second rectifying and filtering unit in series, a second charging access end is formed by the positive direct current bus of the second rectifying and filtering unit and the negative direct current bus of the first rectifying and filtering unit, and the second charging access end is used for being connected with the second charging pile group;
The positive direct current bus of the second rectifying and filtering unit is connected with the negative direct current bus of the third rectifying and filtering unit in series, a third charging access end is formed by the positive direct current bus of the third rectifying and filtering unit and the negative direct current bus of the first rectifying and filtering unit, and the third charging access end is used for accessing the third charging pile group;
the charging system further includes: a charge step-up/step-down control unit including: a first filter capacitor C o, a first inductor L c1, a first power switch S c1, a second power switch S c2, The power system comprises a first power diode D c1, a second power diode D c2, a filtering and boosting energy storage capacitor C c1 and a power battery energy storage bin E c; the positive electrode of the first filter capacitor C o and one end of the first inductor L c1 are sequentially connected to the positive electrode direct current bus of the first charging access terminal/the second charging access terminal/the third charging access terminal, the other end of the first inductor L c1 forms a first connecting point P c, The first connection point P c is connected to the collector of the first power switch S c1 and to the anode of the first power diode D c1, the cathode end of the first power diode D c1 forming the second connection point P o, the second connection point P o is connected to the positive electrode of the filtering and boosting energy storage capacitor C c1 and the collector electrode of the second power switch S c2 in turn, the emitter electrode of the second power switch S c2 is connected to the cathode electrode of the second power diode D c2 and the positive electrode of the power battery energy storage bin E c, The positive electrode of the power battery energy storage bin E c forms a direct current positive electrode access end P+ outwards, and the first charging access end/the second charging access end/the third charging access end is sequentially connected with the negative electrode of the first filter capacitor C o, the emitter of the first power switch S c1, the direct current bus, The negative electrode of the filtering and boosting energy storage capacitor C c1, the positive electrode of the second power diode D c2 and the negative electrode of the power battery energy storage bin E c are connected and externally form a direct current negative electrode access end P-.
2. The ultra-high power multi-voltage range charging system of claim 1, wherein said first rectifying and filtering unit and said third rectifying and filtering unit are triangular ac-dc rectifying and filtering units, and said second rectifying and filtering unit is a star ac-dc rectifying and filtering unit.
3. An ultra-high power multi-voltage range charging system according to claim 1 or 2, wherein said first set of charging piles comprises at least one first charging pile having a first predetermined charging voltage range; the second charging pile group comprises at least one second charging pile with a second preset charging voltage range; the third charging post set includes at least one third charging post having a third preset charging voltage range.
4. The ultra-high power multi-voltage range charging system of claim 1, wherein said first charging post/said second charging post/said third charging post each comprise: a second filter capacitor Cd 1, a third power switch S 1N, a fourth power switch S 2N, A first freewheeling diode SD 1N, a second freewheeling diode SD 2N, a second inductor L N and a bypass power diode D N, The positive electrode of the second filter capacitor Cd 1 and the collector electrode of the third power switch S 1N are sequentially connected to the direct-current positive electrode access terminal P+, The emitter of the third power switch S 1N is connected to the collector of the fourth power switch S 2N and one end of the second inductor L N through a third connection point P N, The first flywheel diode SD 1N, the second flywheel diode SD 2N and the bypass power diode D N are respectively connected with the third power switch S 1N, The fourth power switch S 2N is connected in parallel with the second inductor L N, the other end of the second inductor L N is connected with the anode of the vehicle-mounted battery pack E N to be charged through a fourth connection point M N, The direct current negative electrode access terminal P-is sequentially connected with the negative electrode of the second filter capacitor Cd 1, the emitter of the fourth power switch S 2N and the negative electrode of the vehicle-mounted battery pack E N to be charged.
5. The ultra-high power multi-voltage range charging system according to claim 4, wherein the fourth connection point M N is connected with a high-speed hall current sensor, a voltage sensor and a temperature sensor.
6. An ultra-high power multi-voltage range charging method, the charging method comprising:
connecting a charging power supply to the primary side by utilizing a main transformer, and connecting at least one rectifying and filtering unit group to the secondary side, wherein each rectifying and filtering unit group comprises a first rectifying and filtering unit, a second rectifying and filtering unit and a third rectifying and filtering unit;
The positive DC bus and the negative DC bus of the first rectifying and filtering unit, the second rectifying and filtering unit and the third rectifying and filtering unit respectively form a first charging access end which is respectively corresponding to the first rectifying and filtering unit, and the first charging access end is used for being connected with a first charging pile group;
Connecting the positive DC bus of the first rectifying and filtering unit and the negative DC bus of the second rectifying and filtering unit in series, and forming a second charging access end by the positive DC bus of the second rectifying and filtering unit and the negative DC bus of the first rectifying and filtering unit, wherein the second charging access end is used for accessing a second charging pile group;
connecting the positive DC bus of the second rectifying and filtering unit and the negative DC bus of the third rectifying and filtering unit in series, and forming a third charging access end by the positive DC bus of the third rectifying and filtering unit and the negative DC bus of the first rectifying and filtering unit, wherein the third charging access end is used for accessing a third charging pile group;
the charging method further includes:
The step-up control and the step-down control of the output voltage are performed by a charge step-up/step-down control unit, which includes:
When the voltage of the power battery energy storage bin E c is lower than a preset threshold value, the first power switch S c1 is turned off and the second power switch S c2 is turned on, the output voltage of the first charging access end/the second charging access end/the third charging access end is filtered by the first filter capacitor C o, and then is connected to the positive electrode of the power battery energy storage bin E c through the first inductor L c1, the first power diode D c1 and the second power switch S c2 sequentially by the positive electrode direct current bus, the negative electrode of the power battery energy storage bin E c is connected to the negative electrode direct current bus, and a first charging loop is formed to charge the power battery energy storage bin E c;
When the voltage of the power battery energy storage bin E c is lower than the charging demand voltage, continuously controlling to turn on and off the first power switch S c1 for a plurality of times, so that the output voltage between a direct current positive electrode access end P+ and a direct current negative electrode access end P-formed by the power battery energy storage bin E c outwards is gradually increased; when the first power switch S c1 is turned on, the first inductor L c1, the first power switch S c1, the first power diode D c1, The filtering and boosting energy storage capacitor C c1 forms a boosting chopper circuit, the output voltage filtered by the first filtering capacitor C o is added to the first inductor L c1, so that the current flowing through the first inductor L c1 starts to rise and store energy, Meanwhile, the voltage of the filtering and boosting energy storage capacitor C c1 is kept unchanged; When the first power switch S c1 is turned off, the current flowing through the first inductor L c1 cannot be suddenly changed, and continues to flow through the first power diode D c1 and charges the filtering and boosting energy storage capacitor C c1, Thereby, the output voltage between the direct current positive electrode access end P+ and the direct current negative electrode access end P-formed by the power battery energy storage bin E c outwards is increased;
The collector of the first power switch S c1 is connected to a first connection point P c between the first inductor L c1 and the first power diode D c1, the anode of the filtering and boosting energy storage capacitor C c1 is connected to a second connection point P o between the cathode end of the first power diode D c1 and the collector of the second power switch S c2, the emitter of the second power switch S c2 is connected to the cathode of the second power diode D c2, and the emitter of the first power switch S c1, the cathode of the filtering and boosting energy storage capacitor C c1, and the anode of the second power diode D c2 are connected to a negative dc bus.
7. The method of claim 6, wherein the first set of charging pins comprises at least one first charging pin having a first predetermined charging voltage range; the second charging pile group comprises at least one second charging pile with a second preset charging voltage range; the third charging pile group comprises at least one third charging pile with a third preset charging voltage range; the charging method further includes:
When the first charging pile/the second charging pile/the third charging pile is in charging operation, the second power switch S c2 and the third power switch S 1N are turned on, the positive pole of the power battery energy storage bin E c discharges in a short time and is fused with the output voltage flowing through the second power switch S c2, the fused output voltage is filtered through the second filter capacitor Cd 1, the direct current positive pole access terminal p+ is connected to the positive pole of the vehicle-mounted battery pack E N to be charged through the third power switch S 1N and the bypass power diode D N of the second inductor L N in sequence, the negative pole of the vehicle-mounted battery pack E N to be charged is connected to the direct current negative pole access terminal P-, and a second charging loop is formed to realize high-speed charging of the vehicle-mounted battery pack E N to be charged;
When the first charging pile/the second charging pile/the third charging pile discharges, the second power switch S c2 is turned on and the third power switch S 1N is turned off, after the discharge current of the vehicle-mounted battery pack E N to be charged is suppressed and limited by the second inductor L N, one part of the discharge current directly returns to the negative electrode completion loop of the vehicle-mounted battery pack E N to be charged through the fourth power switch S 2N, and the other part of discharge current is recovered to charge the second filter capacitor Cd 1 through the first freewheeling diode SD 1N on the bypass of the third power switch S 1N;
Wherein the positive electrode of the second filter capacitor Cd 1 and the collector electrode of the third power switch S 1N are sequentially connected to the direct-current positive electrode access terminal P+, The emitter of the third power switch S 1N is connected to the collector of the fourth power switch S 2N and one end of the second inductor L N through a third connection point P N, The first flywheel diode SD 1N, the second flywheel diode SD 2N and the bypass power diode D N are respectively connected with the third power switch S 1N, The fourth power switch S 2N is connected in parallel with the second inductor L N, the other end of the second inductor L N is connected with the anode of the vehicle-mounted battery pack E N to be charged through a fourth connection point M N, The direct current negative electrode access terminal P-is sequentially connected with the negative electrode of the second filter capacitor Cd 1, the emitter of the fourth power switch S 2N and the negative electrode of the vehicle-mounted battery pack E N to be charged.
8. A charging station comprising an ultra high power multi-voltage range charging system according to any of claims 1 to 5.
CN202410591516.1A 2024-05-14 2024-05-14 Super-power multi-voltage-range charging system, charging method and charging station Active CN118163663B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410591516.1A CN118163663B (en) 2024-05-14 2024-05-14 Super-power multi-voltage-range charging system, charging method and charging station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410591516.1A CN118163663B (en) 2024-05-14 2024-05-14 Super-power multi-voltage-range charging system, charging method and charging station

Publications (2)

Publication Number Publication Date
CN118163663A CN118163663A (en) 2024-06-11
CN118163663B true CN118163663B (en) 2024-07-19

Family

ID=91356996

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410591516.1A Active CN118163663B (en) 2024-05-14 2024-05-14 Super-power multi-voltage-range charging system, charging method and charging station

Country Status (1)

Country Link
CN (1) CN118163663B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107046321A (en) * 2016-02-05 2017-08-15 保时捷股份公司 The electrical system of the charging station, the charging station and the purpose of the charging station
CN113169576A (en) * 2018-11-27 2021-07-23 胡斯华纳有限公司 Battery Charger with Multiple Secondary Transformer Circuits

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5546685B2 (en) * 2011-06-10 2014-07-09 三菱電機株式会社 Charger
CN102891613A (en) * 2011-07-21 2013-01-23 台达电子企业管理（上海）有限公司 Alternating current (AC) to direct current (DC) power converter and DC charging station
TWI455470B (en) * 2011-12-30 2014-10-01 Nat Univ Tsing Hua Two - stage isolated DC / AC conversion circuit architecture
US9399407B2 (en) * 2014-08-19 2016-07-26 General Electric Company Vehicle propulsion system having an energy storage system and optimized method of controlling operation thereof
CN106505859A (en) * 2016-11-03 2017-03-15 北京科诺伟业科技股份有限公司 A kind of small-power bi-directional light stores up current transformer
EP3540898B1 (en) * 2017-09-22 2021-03-31 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Power supply circuit, power supply device, and control method
DE102017130474A1 (en) * 2017-12-19 2019-06-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Transformer device for a charging station for the electrical charging of vehicles with at least two charging points
CN111463878B (en) * 2020-05-14 2021-10-01 深圳威迈斯新能源股份有限公司 Compatible high-power double-end output vehicle-mounted charger and control method thereof
CA3159480A1 (en) * 2021-05-19 2022-11-19 Marco Tremblay Power supply unit for vehicle charging

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107046321A (en) * 2016-02-05 2017-08-15 保时捷股份公司 The electrical system of the charging station, the charging station and the purpose of the charging station
CN113169576A (en) * 2018-11-27 2021-07-23 胡斯华纳有限公司 Battery Charger with Multiple Secondary Transformer Circuits

Also Published As

Publication number Publication date
CN118163663A (en) 2024-06-11

Similar Documents

Publication Publication Date Title
Zhang et al. Active battery equalization method based on redundant battery for electric vehicles
CN1186868C (en) Automatic balancing device for series storage battery
Wei et al. An LCC-based string-to-cell battery equalizer with simplified constant current control
US10312553B2 (en) Control device, balance correction device, electric storage system and apparatus
CN113745702B (en) Electric automobile, heating method and device of power battery of electric automobile and storage medium
US9520736B2 (en) Charging control apparatus and charging control method for secondary battery
CN108963362B (en) Charging repair management method and charging repair device for lead-acid storage battery of electric vehicle
US20180183245A1 (en) Improved maintenance method of power battery pack
CN101359837A (en) Charge and discharge fast equalization device for storage battery pack or supercapacitor pack
CN102185354A (en) Intelligent charge-discharge management control system of lithium battery pack for electric bicycle
Shang et al. A crossed pack-to-cell equalizer based on quasi-resonant LC converter with adaptive fuzzy logic equalization control for series-connected lithium-ion battery strings
CN103812153A (en) Active balance type BMS control module and control method for new energy automobile
CN202111486U (en) Lithium battery group intelligent charge and discharge supervisory control system used for electric bicycle
Turksoy et al. A fast and energy-efficient nonnegative least square-based optimal active battery balancing control strategy for electric vehicle applications
Moghaddam et al. Multi-winding equalization technique for lithium ion batteries for electrical vehicles
Maliat et al. Design and analysis of a 48v on-board fast charging system for electric vehicles
CN112104043A (en) Lithium battery equalization control circuit with charging and power supplementing functions and control method thereof
Yu et al. A multi-cell-to-multi-cell equalizer for series-connected batteries based on flyback conversion
Zeltser et al. ZCS resonant converter based parallel balancing of serially connected batteries string
CN110293881A (en) A kind of lithium battery bidirectional equalization system and method based on flyback transformer
CN118163663B (en) Super-power multi-voltage-range charging system, charging method and charging station
CN213937499U (en) A circuit for energy balancing of lithium battery packs in series
Selvaraj et al. Flyback converter employed non-dissipative cell equalization in electric vehicle lithium-ion batteries
CN118163662B (en) Super-power intelligent high-speed charging method, system, equipment and storage medium
Wei et al. A string-to-cell battery equalizer based on fixed-frequency LCC resonant converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant