CN113890371A - Multi-output power distribution control device - Google Patents
Multi-output power distribution control device Download PDFInfo
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- CN113890371A CN113890371A CN202111159125.5A CN202111159125A CN113890371A CN 113890371 A CN113890371 A CN 113890371A CN 202111159125 A CN202111159125 A CN 202111159125A CN 113890371 A CN113890371 A CN 113890371A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
本发明提供一种多输出的功率分配控制装置，通过一电源转换器的一第一二次侧单元耦合一次侧单元感应生成一第一直流电，且通过一第二二次侧单元耦合该一次侧单元感应生成一第二直流电。并由一第一开关单元接收该第一直流电，且由一第二开关单元接收该第二直流电。最后，由一控制单元通过一输出端口接收一受电装置传送的一充电控制信号，根据该充电控制信号控制该第一开关单元或该第二开关单元其中之一导通，并控制其中另一不导通，使该输出端口输出该第一直流电或该第二直流电。由于本发明仅有一组电源转换器，因此不需要多组的电源转换器，能够节省一整组电源转换器所需的空间，故能够提高空间应用效率以及能够符合宽电压调整幅度的应用。
The present invention provides a multi-output power distribution control device, wherein a first DC power is induced by coupling a first secondary side unit of a power converter to a primary side unit, and a second secondary side unit is coupled to the primary side The unit induces a second direct current. The first direct current is received by a first switch unit, and the second direct current is received by a second switch unit. Finally, a control unit receives a charging control signal transmitted by a power receiving device through an output port, controls one of the first switch unit or the second switch unit to conduct according to the charging control signal, and controls the other one Not conducting, so that the output port outputs the first direct current or the second direct current. Since the present invention has only one set of power converters, multiple sets of power converters are not needed, space required for a whole set of power converters can be saved, space application efficiency can be improved, and applications with wide voltage adjustment range can be met.
Description
Technical Field
The present invention relates to a power distribution control device, and more particularly, to a multi-output power distribution control device.
Background
As electronic products are widely popularized, the charging modes of the electronic products are more and more diversified, and various electronic products have different charging powers, so that chargers with various output powers have to be prepared for the electronic products with different charging powers, which is inconvenient for users. For example, there are output voltage specifications of 5 volts (V) -48V and output power specifications of up to 240 watts (W) for the charging specifications promulgated by the USB developer forum (USB IF).
Therefore, in order to provide a wide voltage regulation range and meet the requirement of high power of 240W, the conventional charger needs a plurality of switching structures for integrated output. This leads to a reduction in space utilization, and the portable charger is not portable because the size of the device is increased. For example, referring to fig. 6, in order to realize the functions of high power and multi-voltage output, the conventional charger employs a plurality of sets of parallel isolated dc/ dc converter modules 300 and 400. Usually, one of the groups is responsible for the low voltage requirement, and the other group is responsible for the high voltage requirement.
When the charger receives ac power through the input port 100, the ac power is converted into dc power through the rectifying unit 200, and then the dc power is input to the primary side units of the dc/ dc converter modules 300 and 400, and the converted dc power is output to the high power output port 500 and the general power output port 600 through the secondary side units of the dc/ dc converter modules 300 and 400, respectively. The high power output port 500 is used for outputting the charging power with high voltage requirement to charge the electronic product to be charged, and the general power output port 600 is used for outputting the charging power with low voltage requirement to charge the electronic product to be charged.
However, this architecture requires multiple sets of isolated dc/dc converter modules, which limits the space utilization efficiency of the charger, resulting in a large size and inconvenience in carrying. Therefore, further improvements are still needed in the conventional charger.
Disclosure of Invention
In view of the above, the present invention provides a multi-output power distribution control device, which can output a plurality of different output powers through a single output port, and can effectively improve the space utilization efficiency without providing a plurality of sets of dc/dc converter modules.
The multi-output power distribution control device comprises:
the input port is used for supplying power and is connected to a power supply so as to receive alternating current;
the rectifying unit is electrically connected with the input port, receives the alternating current and converts the alternating current into direct current;
a power converter, comprising:
a primary side unit electrically connected to the rectifying unit to receive the direct current;
a first secondary side unit coupled to the primary side unit for inducing to generate a first direct current;
a second secondary side unit coupled to the primary side unit for inducing to generate a second direct current;
the first switch unit is electrically connected with the first secondary side unit and receives the first direct current;
the second switch unit is electrically connected with the second secondary side unit and receives the second direct current;
the output port is electrically connected with the first switch unit and the second switch unit and is used for supplying power to be connected with a power receiving device;
a control unit electrically connected to the output port, the first switch unit, the second switch unit, the first secondary side unit, the second secondary side unit and the primary side unit;
wherein the control unit receives a charging control signal transmitted by the power receiving device through the output port;
when the charging control signal is a high-voltage charging signal, the control unit controls the first switch unit to be conducted and controls the second switch unit not to be conducted, so that the output port outputs the first direct current, and the control unit controls the primary side unit according to the first direct current and the high-voltage charging signal;
when the charging control signal is a low-voltage charging signal, the control unit controls the second switch unit to be conducted and controls the first switch unit not to be conducted, so that the output port outputs the second direct current, and the control unit controls the primary side unit according to the second direct current and the low-voltage charging signal.
The invention only has one group of power converters and uses two switch units to switch the direct current to be output. The output multiple groups of direct currents are respectively connected to the output port through the two switch units, the control unit receives the charging control signal transmitted by the power receiving device connected with the output port, the power to be output at present is judged, and the on-off of the first switch unit and the second switch unit is adjusted to output the direct currents corresponding to the output power to the output port so as to charge the power receiving device. Therefore, the multi-output power distribution control device provided by the invention does not need a plurality of groups of power converters, can save the space required by a whole group of power converters, can improve the space application efficiency and meet the application of wide voltage adjustment range, and greatly improves the space utilization rate so as to reach the range of optimal design.
Drawings
Fig. 1 is a schematic system architecture diagram of a multi-output power distribution control apparatus according to the present invention.
Fig. 2 is a schematic diagram of another system architecture of the multi-output power distribution control apparatus according to the present invention.
Fig. 3 is a schematic circuit diagram of a multi-output power distribution control apparatus according to the present invention.
Fig. 4 is a schematic diagram of another system architecture of the multi-output power distribution control apparatus according to the present invention.
Fig. 5 is a system architecture diagram of another embodiment of the multi-output power distribution control apparatus according to the present invention.
Fig. 6 is a schematic diagram of a system architecture of a conventional charger.
Detailed Description
Referring to fig. 1, the multi-output power distribution control apparatus of the present invention includes an input port 10, a rectifying unit 20, a power converter 30, a first switch unit 40, a second switch unit 50, an output port 60, and a control unit 70.
The input port 10 is electrically connected to a power source for receiving an alternating current. The rectifying unit 20 is electrically connected to the input port 10 to receive the ac power and convert the ac power into a dc power.
The power converter 30 includes a primary side unit 31, a first secondary side unit 32 and a second secondary side unit 33. The primary side unit 31 is electrically connected to the rectifying unit 20 to receive the dc power. The first secondary unit 32 is coupled to the primary unit 31 to generate a first direct current. The second secondary-side unit 33 is coupled to the primary-side unit 31 to inductively generate a second direct current.
The first switch unit 40 is electrically connected to the first secondary side unit 32 and receives the first direct current. The second switching unit 50 is electrically connected to the second secondary-side unit 33 and receives the second dc power.
The output port 60 is electrically connected to the first switch unit 40 and the second switch unit 50, and is electrically connected to a power receiving device. The control unit 70 is electrically connected to the output port 60, the first switch unit 40, the second switch unit 50, the first secondary side unit 32, the second secondary side unit 33 and the primary side unit 31.
The control unit 70 receives a charging control signal from the powered device through the output port 60. When the charging control signal is a high-voltage charging signal, the control unit 70 controls the first switch unit 40 to be turned on and controls the second switch unit 50 to be turned off, so that the output port 60 outputs the first direct current, and the control unit 70 controls the primary side unit 31 according to the first direct current and the high-voltage charging signal. When the charging control signal is a low-voltage charging signal, the control unit 70 controls the second switch unit 50 to be turned on and controls the first switch unit 40 to be turned off, so that the output port 60 outputs the second dc power, and the control unit 70 controls the primary side unit 31 according to the second dc power and the low-voltage charging signal.
Since the present invention has only one set of power converter 30, and two switching units are used to switch the output dc power, i.e. the first switching unit 40 and the second switching unit 50. The first direct current or the second direct current is respectively output to the output port 60 through the first switch unit 40 and the second switch unit 50, and the control unit 70 determines the power to be output at present according to the charging control signal transmitted by the power receiving device connected to the output port 60, so as to adjust the on/off of the first switch unit 40 and the second switch unit 50, control the direct current corresponding to the output power to be output to the output port 60, and further provide the power receiving device for charging. Therefore, the multi-output power distribution control device provided by the invention does not need a plurality of groups of power converters, can save the space required by a whole group of power converters, can improve the space application efficiency and meet the application of wide voltage adjustment range, and greatly improves the space utilization rate so as to reach the range of optimal design.
For example, when the control unit 70 determines that the power-receiving device needs a high-power source to charge according to the charging control signal, the control unit 70 controls the first switch unit 40 to be turned on, outputs the first high-voltage direct current, such as a direct current of 48 volts (V), and charges the power-receiving device with a current of 5 amperes (a) and a high power of 240 watts (W). When the control unit 70 determines that the power receiving device needs a low power source to charge according to the charging control signal, the control unit 70 controls the second switch unit 50 to be turned on, outputs the second dc power with a low voltage, for example, 5V dc power, and charges the power receiving device with a current of 3A and a low power of 15W.
Referring to fig. 2 and 3, the multi-output power distribution control apparatus further includes an anti-electromagnetic interference unit 80, the anti-electromagnetic interference unit 90 is electrically connected between the input port 10 and the rectifying unit 20, and the ac power passes through the anti-electromagnetic interference unit 80 and is output to the rectifying unit 20. By the configuration of the anti-electromagnetic interference unit 80, the electromagnetic interference noise in the alternating current can be reduced. In the present embodiment, the rectifying unit 20 is a bridge rectifier, and the anti-electromagnetic interference unit 80 is a common mode inductor.
Further, the first switch unit 40 is a first Metal Oxide Semiconductor Field Effect Transistor (MOSFET), a source and a drain of the first MOSFET are electrically connected between the first secondary side unit 32 and the output port 60, and a gate of the first MOSFET is electrically connected to the control unit 70.
The second switching unit 50 is a second MOSFET, a source and a drain of the second MOSFET are electrically connected between the second secondary-side unit 33 and the output port 60, and a gate of the second MOSFET is electrically connected to the control unit 70.
In this way, the control unit 70 can control whether the first switch unit 40 and the second switch unit 50 are turned on or off by controlling the gate voltages of the first MOSFET and the second MOSFET.
The first secondary unit 32 includes a secondary module 321 and a first Synchronous Rectifier control (Synchronous Rectifier control) module 322. The second secondary-side unit 33 includes a second secondary-side module 331 and a second synchronous rectification control module 332.
The first secondary module 321 includes a first coil 3211, and the first coil 3211 is coupled to the primary unit 31 to generate the first direct current. The first synchronous rectification control module 322 is electrically connected to the first secondary-side module 321 and the first switch unit 40 to receive the first direct current and output the first direct current after synchronous rectification to the first switch unit 40.
The second secondary side module 331 includes a second coil 3311, and the second coil 3311 is coupled to the primary side unit 31 to generate the second dc power. The second synchronous rectification control module 332 is electrically connected to the second secondary side module 331 and the second switching unit 50 to receive the second dc power and output the second dc power after synchronous rectification to the second switching unit 50. In this embodiment, the first synchronous rectification module 322 includes a first synchronous rectification controller 3221, and the second synchronous rectification module 332 includes a second synchronous rectification controller 3321. The first synchronous rectification controller 3221 and the second synchronous rectification controller 3321 are both MP3608GJ-Z in type.
In addition, the primary unit 31 includes a primary coil 311 and a primary switch 312.
The primary coil 311 is coupled to the first coil 3211 of the first secondary-side module 321 of the first secondary-side unit 32 and the second coil 3311 of the second-side module 331 of the second secondary-side unit 33.
The primary switch 312 and the primary coil 311 are connected in series and then connected between a positive output terminal and a negative output terminal of the rectifying unit 20, and a control terminal of the primary switch 312 is connected to the control unit 70.
Further, the control unit 70 includes a circuit control module 71 and a power conversion control module 72.
The circuit control module 71 is electrically connected to the output port 60, the gate of the first MOSFET of the first switch unit 40, the gate of the second MOSFET of the second switch unit 50, the first secondary side unit 32, and the second secondary side unit 33. The circuit control module 71 receives the charging control signal transmitted by the powered device through the output port 60. And when the charging control signal is the high-voltage charging signal, the circuit control module 71 controls the first switch unit 40 to be turned on and controls the second switch unit 50 to be turned off, so that the output port 60 outputs the first direct current. When the charging control signal is the low-voltage charging signal, the circuit control module 71 controls the second switch unit 50 to be turned on and controls the first switch unit 40 to be turned off, so that the output port 60 outputs the second direct current.
The power conversion control module 72 is coupled to the circuit control module 71 and electrically connected to a control terminal of the primary side switch 312 of the primary side unit 31, and the power conversion control module 72 controls the primary side unit 31 according to a feedback control signal generated by the circuit control module 71. When the first switch unit 40 is turned on, the circuit control module 71 generates the feedback control signal according to the first direct current and the high-voltage charging signal. When the second switch unit 50 is turned on, the circuit control module 71 generates the feedback control signal according to the second dc power and the low-voltage charging signal. In this embodiment, the circuit control module 71 is of model number WT6633F, and the power conversion control module 72 is of model number NCP 12601.
Referring to fig. 4, the circuit control module 71 includes a charge controller 711 and a control circuit 712.
The charging controller 711 is electrically connected to the output port 60, the first switch unit 40, and the second switch unit 50. The charging controller 711 receives the charging control signal transmitted by the powered device through the output port 60. When the charging control signal is the high-voltage charging signal, the charging controller 711 controls the first switch unit 40 to be turned on and controls the second switch unit 50 to be turned off, so that the output port 60 outputs the first direct current. When the charging control signal is the low-voltage charging signal, the charging controller 711 controls the second switch unit 50 to be turned on and controls the first switch unit 40 to be turned off, so that the output port 60 outputs the second dc power.
The control circuit 712 is electrically connected to the first secondary side unit 32, the second secondary side unit 33 and the charging controller 711, and is coupled to the power conversion control module 72. When the first switch unit 40 is turned on, the control circuit 712 generates the feedback control signal according to the first direct current and the high-voltage charging signal. When the second switch unit 50 is turned on, the control circuit 712 generates the feedback control signal according to the second dc power and the low-voltage charging signal.
In this embodiment, the charging controller 711 is a USB power controller (USB PD controller), and the control circuit 712 is optically coupled to the power conversion control module 72. The control circuit 712 and the power conversion control module 72 control the primary unit 31 in a conventional feedback control manner of a dc/dc converter, which is not described herein again.
The multi-output power distribution control apparatus further includes a power factor correction circuit 91 and a power factor controller 92.
The pfc circuit 91 is electrically connected between the rectifier unit 20 and the primary side unit 31, receives the dc power, and outputs the dc power after correction to the primary side unit 31. The power factor controller 92 is electrically connected to the power factor correction circuit 91, receives the corrected dc power, and controls the power factor correction circuit 91 according to the feedback of the corrected dc power.
Referring to fig. 5, in another embodiment of the present invention, the first switch unit 40 includes a first switch 41, a first direct current/direct current (DC/DC) converter 42 and a switch module 43.
The first switch 41 is electrically connected between the first secondary side unit 32 and the output port 60 to receive the first direct current, and is electrically connected to the control unit 70. The first DC/DC converter 42 is electrically connected to the first secondary unit 32 to receive the first direct current and convert the first direct current into a third direct current. The third switch 43 is electrically connected between the first DC/DC converter and the output port 60 to receive the third DC power, and is electrically connected to the control unit 70.
The second switch unit 50 includes a second switch 51, a second DC/DC converter 52 and a four-switch 53.
The second switch 51 is electrically connected between the second secondary-side unit 33 and the output port 60 to receive the second dc power, and is electrically connected to the control unit 70. The second DC/DC converter is electrically connected to the second secondary-side unit 33 to receive the second DC power and convert the second DC power into a fourth DC power. The fourth switch 43 is electrically connected between the second DC/DC converter 52 and the output port 60 to receive the fourth DC power, and is electrically connected to the control unit 70.
When the charging control signal is the high-voltage charging signal, the control unit 70 controls the first switch 41 to be turned on, and controls the second switch 51, the third switch 43 and the fourth switch 43 to be turned off, so that the output port 60 outputs the first direct current.
When the charging control signal is a primary high-voltage charging signal, the control unit 70 controls the third switch 43 to be turned on, and controls the first switch 41, the second switch 51 and the fourth switch 53 to be turned off, so that the output port 60 outputs the third dc power.
When the charging control signal is the low-voltage charging signal, the control unit 70 controls the second switch 51 to be turned on, and controls the first switch 41, the third switch 43 and the fourth switch 53 to be turned off, so that the output port 60 outputs the second direct current.
When the charging control signal is a primary low-voltage charging signal, the control unit 70 controls the fourth switch 53 to be turned on, and controls the first switch 41, the second switch 51 and the third switch 43 to be turned off, so that the output port 60 outputs the fourth direct current.
Further, the first switch 41 is the first MOSFET, a source and a drain of the first MOSFET are electrically connected between the first secondary side unit 32 and the output port 60, and a gate of the first MOSFET is electrically connected to the control unit 70.
The third switch 43 is a third MOSFET, a source and a drain of which are electrically connected between the first DC/DC converter 42 and the output port 60, and a gate of which is electrically connected to the control unit 70.
The second switch 51 is the second MOSFET, a source and a drain of the second MOSFET are electrically connected between the second secondary-side unit 33 and the output port 60, and a gate of the second MOSFET is electrically connected to the control unit 70.
The fourth switch 53 is a fourth MOSFET, a source and a drain of which are electrically connected between the second DC/DC converter 52 and the output port 60, and a gate of which is electrically connected to the control unit 70.
In this embodiment, the output port 60 can receive the first to fourth dc currents with different voltages, and the control unit 70 controls the first to fourth switches 41, 43, 51, 53 according to the received charging control signal, so that the output port 60 can output different voltages to charge the power receiving device. For example, the first direct current is a power supply with a voltage of 48V, a current of 5A, and an output power of 240W. The second direct current is a power supply with a voltage of 20V, a current of 5A and an output power of 100W. The third direct current is a power supply with the voltage of 36V, the current of 5A and the output power of 180W. The fourth direct current is a power supply with voltage of 5V, current of 3A and output power of 15W.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
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| CN116317043A (en) * | 2023-02-21 | 2023-06-23 | 西安奇点能源股份有限公司 | Battery pack charge-discharge circuit, system, method, storage medium and computer device |
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| US20200313561A1 (en) * | 2019-03-29 | 2020-10-01 | Power Integrations, Inc. | Method and apparatus for continuous conduction mode operation of a multi-output power converter |
| CN113103926A (en) * | 2020-01-09 | 2021-07-13 | 现代自动车株式会社 | Vehicle, battery charging method for vehicle, and recording medium |
| CN113394979A (en) * | 2020-03-12 | 2021-09-14 | Oppo广东移动通信有限公司 | Power supply device and charging control method |
| CN112803540A (en) * | 2020-08-04 | 2021-05-14 | 台达电子工业股份有限公司 | Charging/discharging device and charging/discharging system for electric vehicle |
| CN214176969U (en) * | 2020-11-09 | 2021-09-10 | 深圳拓邦股份有限公司 | Wide voltage range charging conversion circuit and charging device |
| CN112994468A (en) * | 2021-03-03 | 2021-06-18 | 国创移动能源创新中心(江苏)有限公司 | Direct current charging module output series-parallel circuit and control method thereof |
| CN113212215A (en) * | 2021-06-23 | 2021-08-06 | 阳光电源股份有限公司 | Direct-current charging pile, charging control method and charging station |
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| CN116317043A (en) * | 2023-02-21 | 2023-06-23 | 西安奇点能源股份有限公司 | Battery pack charge-discharge circuit, system, method, storage medium and computer device |
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