CN106532888A - Parallel battery module and method - Google Patents
Parallel battery module and method Download PDFInfo
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- CN106532888A CN106532888A CN201611146023.9A CN201611146023A CN106532888A CN 106532888 A CN106532888 A CN 106532888A CN 201611146023 A CN201611146023 A CN 201611146023A CN 106532888 A CN106532888 A CN 106532888A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a parallel battery module. The parallel battery module comprises a filtering circuit, a rectifying circuit, a PFC (Power Factor Correction) circuit, a first DC/DC converter, an energy storage element and a current limiting element which are sequentially connected, wherein an output end of the PFC circuit is connected with a storage battery through a second DC/DC converter, and charges the storage battery when an AC power supply is normal; the storage battery boosts and converts a DC power supply inputted by the storage battery into 110V or 220V DC voltage through a third DC/DC converter, the third DC/DC converter is connected with an output end of the first DC/DC converter in parallel, and the 110V or 220V DC voltage is outputted to a module output end through the energy storage element and the current limiting element. The parallel battery module acts as a hot backup of the first DC/DC converter in normal operation, can provide current output in overload, and drives a load together with the first DC/DC converter. The overload capacity of the parallel battery module is effectively improved.
Description
Technical field
The present invention relates to a kind of batteries in parallel connection module and method.
Background technology
Core of the battery as transformer station/power plant's DC power system, its reliability directly determine direct current
The reliability that origin system is powered.Traditional DC power-supply system is together in series by more piece battery and constitutes batteries to use
's.
Battery is used in series, and has a disadvantage that：
1) cell batteries fault impact whole group output.Internal storage battery chemical reaction or Ion transfer are difficult to artificial accurate
Control, serial number are more, and monomer failure occurrence probability is bigger.
2) storage battery parameter must be consistent.Different brands, different type, the electric power storage of even same producer's different batches
Pond can not be used in mixed way, and battery utilization ratio is reduced.
3) batteries dilatation is difficult, generally requires replacing whole group battery.
4) batteries can only whole group redundant configuration, redundant configuration high cost.
5) batteries cannot realize online full capacity core appearance, on-bne repair, replacing.
At present, generally solved the above problems using batteries in parallel connection module, but as shown in Fig. 2, existing batteries in parallel connection mould
When exchange input dead electricity, battery passes through the first DC transfer circuit and the second DC transfer circuit two-stage DC converting to negative to block
Power supply being carried, a part of efficiency all being lost per one-level DC converting, whole efficiency is relatively low；Overload capability is poor；It is short loading
Lu Shi, the short circuit current that DC transfer circuit is provided are less, it is impossible to which the breaker of Reliable guarantee fault loop reliably disconnects, and causes
Fault coverage expands.
Meanwhile, just for single-unit 12V lead-acid accumulators, accommodation is narrow for existing batteries in parallel connection module.It is typically no to match somebody with somebody
Put Storage Battery Monitor Unit, it is impossible to which the parameter such as temperature, single battery voltage, single battery internal resistance to battery is monitored.
Protection, monitoring to batteries in parallel connection module, control function refer to less, function not enough improve and DC transfer circuit efficiency compared with
It is low.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of batteries in parallel connection module and method, the invention power input
There was only the conversion of 1 level power supply between DC output end, improve overall transformation efficiency.First DC/DC converters during normal work
Connect load simultaneously with the 3rd DC/DC converters, significantly improve overload capability.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of batteries in parallel connection module, including the filter circuit, rectification circuit, PFC circuit of power factor correction being sequentially connected,
First DC/DC converters, energy-storage travelling wave tube and current limiting element, are direct current output by the convert alternating current of input；
The output end of the PFC circuit of power factor correction connects battery by the 2nd DC/DC converters, in alternating current
Charge a battery when source is normal；
The battery by the 3rd DC/DC converters, the dc source boosting inverter that battery is input into be 110V or
220V DC voltages, the 3rd DC/DC converters are in parallel with the output end of DC/DC converters, Jing energy-storage travelling wave tubes and limit
Fluid element, output to module output end, during normal work as DC/DC converters Hot Spare, during overload, there is provided electricity
Stream output, with the common bringing onto load of DC/DC converters；
The PFC circuit of power factor correction, DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC become
Parallel operation is all connected with module monitors unit, the monitoring of receiving module monitoring unit, protection, control, and by module monitors unit with
Host computer is communicated；
Optionally, the battery pack is connected with battery monitor unit, gathers voltage, temperature, internal resistance and the electric current of battery pack
Information, there is provided battery cell monitoring and protection.
Preferably, the battery is battery pack or battery, and the battery pack includes the battery of multi-section serial.
The voltage range of the battery pack is 10-56V.
Preferably, DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters adopt LLC
Resonance potential type topology.
Preferably, the module monitors unit is PFC circuit of power factor correction, DC/DC converters, the 2nd DC/
DC converters and the 3rd DC/DC converters provide output over-voltage protection, output low-voltage protection, output overcurrent protection, mistake
Temperature protection and output end short-circuit protection.
Preferably, module monitors unit monitoring PFC circuit of power factor correction, DC/DC converters, second
The input voltage of DC/DC converters and the 3rd DC/DC converters, output voltage and output current.
Preferably, the single battery voltage of battery monitor unit monitoring battery pack, battery total voltage, battery current,
Battery remaining power and/or cell operating status.
Preferably, the filter circuit is EMI filter circuit.
When AC power has electricity and loads normal, dc bus is mainly powered by DC/DC converters, and the 3rd
DC/DC converters are intended only as Hot Spare, not external output current.
Based on the method for work of above-mentioned module, when exchange has electricity and loads normal, the filtered circuit of exchange input, rectification
Circuit and PFC circuit of power factor correction are transformed to DC voltage A after processing, the first DC/DC converters of Jing be transformed to 110V or
To internal direct current bus, through energy-storage travelling wave tube and current limiting element, external dc bus is arrived in output to 220V direct voltage outputs, there is provided
Load is used, while the 2nd DC/DC converters of DC voltage A Jing conversion step-down is carried out to battery pack for the dc source of 10-56V
Charge, the 3rd DC/DC converter boosts of cell voltage Jing are transformed to 110V or DC220V DC voltages, output is female to internal direct current
Line, as the Hot Spare of DC/DC converters.
Based on the method for work of above-mentioned module, when power failure state is exchanged, DC/DC converters and the 2nd DC/DC become
Parallel operation does not work, and the conversion boosting of the 3rd DC/DC converters of cell voltage Jing is 110V or 220V DC voltages, and output is arrived internal straight
Stream bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
Based on the method for work of above-mentioned module, there is electricity in exchange, but during module overload operation, DC/DC converters
Worked with the 3rd DC/DC converters simultaneously, while output current is to internal direct current bus, through energy-storage travelling wave tube and current limiting element,
Export external dc bus, there is provided load is used.
The 2nd DC/DC converters are charged management according to the charging curve of setting to battery pack.
When the battery pack is lead-acid accumulator, charged using three sections of constant-current charge, modified constant-voltage charge and floating charging bent
Line is charged；When battery pack is lithium ion battery, it is charged using Multi-section constant current charging curve.
A kind of DC power system, including multiple batteries in parallel connection modules described above.
Beneficial effects of the present invention are：
(1) there was only 1 level power supply conversion module between power input and DC output end, compared with existing design scheme, improve
Overall transformation efficiency；
(2) DC/DC converters of the invention and the 3rd DC/DC converters are connected in load simultaneously, overload capability
Significantly improve, in load short circuits, 2 DC transfer circuits can provide short circuit current, and current output capability is existing skill
2 times of art, the breaker of guarantee fault loop that can be more reliable disconnect, it is to avoid fault coverage expands；
(3) battery types of battery pack can be lead-acid battery, lithium ion battery, lead carbon battery etc., and accommodation is wider,
Except basic electric energy translation function is completed, perfect protection, monitoring, control function are also provided；
(4) battery monitor unit is configured with, the parameters such as battery temperature, single battery voltage, single battery internal resistance is carried out
Monitoring.Effectively ensure the reliability of power-supply system, meanwhile, it is more precise control during battery charge and discharge are managed
Charge-discharge parameter provides foundation.In addition, providing data supporting for the estimation of more accurate battery capacity；
(5) three DC-DC modules for adopting all use LLC resonance potentials type topology, using DSP digital soft switch algorithm controls
System.Above topology and algorithm switching loss are low, and energy conversion efficiency is high, and algorithm control is flexible.
Description of the drawings
Fig. 1 is batteries in parallel connection system block diagram；
Fig. 2 is prior art batteries in parallel connection module frame chart；
Fig. 3 is batteries in parallel connection module frame chart after improvement of the invention.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
1st, as shown in figure 3, a kind of batteries in parallel connection module adopts the scheme of 3 DC transfer circuits, program global design
Advantage：
1) there was only the conversion of 1 level power supply between power input and DC output end, compared with existing design scheme, improve entirety
Conversion efficiency；
2) 2 DC converters (DC/DC1 and DC/DC3) are directly connected in load, overload capability is significantly improved；
3) 2 DC converters (DC/DC1 and DC/DC3) are directly connected in load, in load short circuits, 2 direct currents
Translation circuit can provide short circuit current, and current output capability is 2 times of prior art, and guarantee failure that can be more reliable is returned
The breaker on road disconnects, it is to avoid fault coverage expands.
2nd, batteries in parallel connection module of the present invention, the battery for using can use the battery or battery of 10-56V voltage ranges
Group.It can be the battery pack of single battery, or multiple batteries series connection.Battery types can be lead-acid battery, lithium ion
Battery, lead carbon battery etc..Accommodation is wider.
3rd, batteries in parallel connection module of the present invention, it is optional with battery monitor unit, to battery temperature, single battery voltage,
The parameters such as single battery internal resistance are monitored.Effectively ensure the reliability of power-supply system.Meanwhile, it is battery charge and discharge pipe
During reason, more precise control charge-discharge parameter provides foundation.In addition, providing number for the estimation of more accurate battery capacity
According to support.
4th, batteries in parallel connection module of the present invention, except basic electric energy translation function is completed, also provides perfect protection, prison
Survey, control function.
4.1st, defencive function
1) module output over-voltage protection
2) module output low-voltage protection
3) module output overcurrent protection
4) module output end short-circuit protection
5) module overheat protector
4.2nd, monitoring function
1) AC-input voltage monitoring
2) module output voltage monitoring
3) module output current monitoring
4) battery total voltage monitoring
5) single battery voltage monitoring
6) battery current monitoring monitoring
7) battery remaining power monitoring
8) cell operating status monitoring
9) battery temperature monitoring
4.3rd, control function
Manual powered control
Manual control of discharge
Charging process is managed
Discharge process is managed
Hold from kinetonucleus and control
Manual core holds control
5th, in batteries in parallel connection module of the present invention, three DC-DC modules of employing are all opened up using LLC resonance potential types
Flutter, controlled using DSP digital soft switchs algorithm.Above topology and algorithm switching loss are low, and energy conversion efficiency is high, algorithm control
Flexibly.
6th, battery allocation plan
Recommend 3 battery allocation plans
6.1st, scheme 1：Battery pack is realized using single-unit 12V lead-acid batteries.
1) there is no series connection situation in the battery of each batteries in parallel connection inside modules configuration of this configuration, can be to greatest extent
Avoid the shortcoming of series connection battery.
2) in 110kV transforming plant DC power-supply system applications, need to be reached directly using 10 several batteries in parallel connection wired in parallel
The capacity requirement of stream power supply, using the configuration of " N+1 " redundancy, used as redundancy backup, redundant configuration cost is most for 1 module of multi-configuration
It is low.
3) there is batteries in parallel connection module more, the imperfect problem of economy of configuration in the program.
6.2nd, scheme 2：Battery pack realizes that using 2 section 12V lead-acid batteries series connection battery voltage is 24V.
1) this configuration cell voltage is high, and the no-load voltage ratio of DC/DC2 and DC/DC3 is relatively low, and conversion efficiency is higher.
2) capacity of single batteries in parallel connection module is compared and increased 1 times using the situation of single-unit 12V batteries.Become in 110kV
In electric station DC power-supply system application, the capacity requirement of dc source is can reach using 5,6 batteries in parallel connection wired in parallel.5、
6 wired in parallel, using the configuration of " N+1 " redundancy, 1 module of multi-configuration is used as redundancy backup, 20% or so redundant configuration
Cost, redundant configuration moderate cost.
3) 2 batteries series connection, wherein 1 piece of failure, 2 pieces of batteries needs replacings simultaneously, battery integrated cost are more electric than single-unit 12V
Pond scheme is slightly improved.
6.3rd, scheme 3：Battery pack realizes that using 4 section 12V lead-acid batteries series connection battery voltage is 48V.
1) this configuration cell voltage highest, the no-load voltage ratio of DC/DC2 and DC/DC3 are minimum, conversion efficiency highest.
2) capacity of single batteries in parallel connection module is compared and increased 3 times using the situation of single-unit 12V batteries.Become in 110kV
In electric station DC power-supply system application, the capacity requirement of dc source is can reach using 3 batteries in parallel connection wired in parallel.Using
The configuration of " N+1 " redundancy, 1 module of multi-configuration is used as redundancy backup, 30% or so redundant configuration cost, with respect to higher.
3) 4 batteries series connection, wherein 1 piece of failure, 4 pieces of batteries need while replacing, battery integrated cost highest.
Above-mentioned 3 schemes of Integrated comparative, 2 moderate cost of scheme, module number are moderate, it is proposed that preferential to select.
7th, batteries in parallel connection modular structure form allocation plan
Battery, battery monitor unit, energy-storage travelling wave tube, current limiting element, this 4 parts of batteries in parallel connection module are wherein
One of or all, can be external according to structure, dimensional requirement, be connected with batteries in parallel connection module by cable, it is also possible to which whole is interior
Put.
8th, batteries in parallel connection module working method is introduced
Module work is divided into three state：S1 exchanges have electricity condition, S2 exchange power failure states, S3 exchanges to have electricity, and module is born excessively
Carry running status.
In S1 states：Module by AC power be input into (AC220V or AC380V), Jing EMI filter circuits, rectification circuit and
DC voltage 1 (voltage magnitude and AC power input voltage virtual value phase are transformed to after the process of PFC circuit of power factor correction
When), Jing DC/DC1 are transformed to the output of DC110V or DC220V DC voltages 2 to internal direct current bus, through energy-storage travelling wave tube and limit
Fluid element, output to external dc bus, there is provided load is used.The step-down of 1 Jing DC/DC2 of DC voltage conversion simultaneously is DC10-
The dc source of 56V is charged to battery.Cell voltage Jing DC/DC3 boosting inverters are DC110V or DC220V direct currents
Pressure, output to internal direct current bus, as the Hot Spare of DC/DC1.The VD setting valve of DC/DC3 is than DC/DC1's
VD setting valve is lower slightly, so when AC power has electricity and loads normal, dc bus is mainly by DC/
DC1 powers, and DC/DC3 is intended only as Hot Spare, will not external output current.All there is inside DC/DC1 and DC/DC3 reverse-filling
Circuit, can only internally dc bus output current, it is impossible to by internal direct current bus input current.
In S2 states：Exchange dead electricity, DC/DC1 and DC/DC2 do not work, and cell voltage Jing DC/DC3 conversion boostings are
DC110V or DC220V DC voltages, output to internal direct current bus, through energy-storage travelling wave tube and current limiting element, output is straight to outside
Stream bus, there is provided load is used.
In S3 states, exchange has electricity, module overload operation, DC/DC1 and DC/DC3 work simultaneously, while output current
To internal direct current bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
Module monitors unit, is made up of microcontroller, Acquisition Circuit, control circuit, algorithm, to PFC PFCs
Circuit, DC/DC1, DC/DC2, DC/DC3 etc. are monitored and control, and transmit various signals and order with upper machine communication.
DC/DC1, DC/DC2 and DC/DC3 are topological using LLC resonance potentials type, using DSP digital soft switch algorithm controls
System, completes efficient voltage conversion and energy transmission, and can upload DC/DC module working conditions with module monitors unit communication
Information, battery information etc., and the control of receiving module monitoring unit.
Inside DC/DC2, dsp controller is provided simultaneously with battery Charge Management function, controls DC/DC2 filling according to setting
Electric curve is charged management to battery.General lead-acid accumulator adopts constant-current charge>Modified constant-voltage charge>It is floating
The three sections of charging curves that charge are charged.Lithium ion battery is charged using Multi-section constant current charging curve.
Energy-storage travelling wave tube, is typically made up of electric power electrochemical capacitor or super capacitor, stores energy at ordinary times, is occurred in load-side
During impact load, there is provided high current in short-term, DC/DC units are prevented because impact load causes overcurrent protection；Meanwhile, it is short in load-side
Lu Shi, as circuit breaker trip needs larger electric current, and needs the lasting regular hour, and DC/DC converters individually cannot be carried
For the circuit breaker trip electric current, DC/DC overcurrent protections may be caused.At this time, high current in short-term is provided by energy-storage travelling wave tube, drive
Circuit breaker trip, after circuit breaker trip, DC/DC modules can continue to normal work, provide working power for normal load.
Current limiting element, is made up of current-limiting circuit and flow equalizing circuit.Load it is normal when, play multiple batteries in parallel connection modules it
Between current balance effect；In load-side short circuit, the energy-storage travelling wave tube velocity of discharge is controlled, (should with the controllable electric flow valuve that can be adjusted
Electric current need to be more than circuit breaker trip electric current) electric discharge, it is ensured that reliable fault trip is realized with minimum energy storage cost.
Battery monitor unit is a selectable unit, is mainly used in configuring the situation of battery pack, for each list in battery pack
The monitoring of the states such as the voltage of batteries, internal resistance, temperature, the charging process control and discharge process control for battery pack provide control
Parameter foundation processed.Meanwhile, data supporting is provided for the estimation of more accurate battery capacity.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
The various modifications made by needing to pay creative work or deformation are still within protection scope of the present invention.
Claims (10)
1. a kind of batteries in parallel connection module, is characterized in that：Including the filter circuit, rectification circuit, PFC power factors school that are sequentially connected
Positive circuit, DC/DC converters, energy-storage travelling wave tube and current limiting element, are direct current output by the convert alternating current of input；
The output end of the PFC circuit of power factor correction connects battery by the 2nd DC/DC converters, and the 2nd DC/DC becomes
Parallel operation charges a battery when AC power is normal.
By the 3rd DC/DC converters, the dc source boosting inverter that battery is input into is 110V or 220V to the battery
DC voltage, the 3rd DC/DC converters are in parallel with the output end of DC/DC converters, Jing energy-storage travelling wave tubes and current limiting element, defeated
Go out the output end to batteries in parallel connection module；During normal work, as the Hot Spare of DC/DC converters；During overload, there is provided
Electric current is exported, with the common bringing onto load of DC/DC converters.
2. a kind of batteries in parallel connection module as claimed in claim 1, is characterized in that：The first DC/DC converters, the 2nd DC/
DC converters and the 3rd DC/DC converters are using LLC resonance potentials type topology.
3. a kind of batteries in parallel connection module as claimed in claim 1, is characterized in that：The module monitors unit be PFC power because
Number correcting circuit, DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters provide output over-voltage and protect
Shield, output low-voltage protection, output overcurrent protection, overheat protector and output end short-circuit protection.
4. a kind of batteries in parallel connection module as claimed in claim 1, is characterized in that：The module monitors unit monitors PFC power
The input voltage of factor correcting circuit, DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters, output
Voltage and output current.
5. a kind of batteries in parallel connection module as claimed in claim 1, is characterized in that：When AC power has electricity and loads normal
Wait, dc bus is mainly powered by DC/DC converters, and the 3rd DC/DC converters are intended only as Hot Spare, externally do not export
Electric current.
6. the method for work based on the module as any one of claim 1-5, is characterized in that：There is electricity condition in exchange
When, the exchange filtered circuit of input, rectification circuit and PFC circuit of power factor correction are transformed to DC voltage A after processing, Jing the
One DC/DC converters are transformed to 110V or 220V direct voltage outputs to internal direct current bus, through energy-storage travelling wave tube and current limliting unit
Part, output to external dc bus, there is provided load is used, while the conversion step-down of the 2nd DC/DC converters of DC voltage A Jing is
The dc source of 10-56V is charged to battery pack, the 3rd DC/DC converter boosts of cell voltage Jing be transformed to 110V or
220V DC voltages, output to internal direct current bus, as the Hot Spare of DC/DC converters.
7. the method for work based on the module as any one of claim 1-5, is characterized in that：In exchange power failure state
When, DC/DC converters and the 2nd DC/DC converters do not work, and the conversion boosting of the 3rd DC/DC converters of cell voltage Jing is
110V or 220V DC voltages, output to internal direct current bus, through energy-storage travelling wave tube and current limiting element, output is female to external dc
Line, there is provided load is used.
8. the method for work based on the module as any one of claim 1-5, is characterized in that：There are electricity, module in exchange
During overload running status, DC/DC converters and the 3rd DC/DC converters are worked simultaneously, while output current is to inside
Dc bus, through energy-storage travelling wave tube and current limiting element, output to external dc bus, there is provided load is used.
9. method of work as claimed in claim 6, is characterized in that：The 2nd DC/DC converters are bent according to the charging of setting
Line is charged management to battery pack, when the battery pack is lead-acid accumulator, using constant-current charge, modified constant-voltage charge and floating
The three sections of charging curves that charge are charged；
Or when battery pack is lithium ion battery, be charged using Multi-section constant current charging curve.
10. a kind of DC power system, is characterized in that including the batteries in parallel connection mould any one of multiple claims 1-5
Block.
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Cited By (10)
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| CN107591832A (en) * | 2017-10-17 | 2018-01-16 | 深圳市泰昂能源科技股份有限公司 | Energy storage managing device and energy storage monitor system |
| CN108988454A (en) * | 2018-08-01 | 2018-12-11 | 天津津电供电设计所有限公司 | Energy storage type bus circuit structure and DC power system |
| CN110182103A (en) * | 2019-06-26 | 2019-08-30 | 上海海得控制系统股份有限公司 | A kind of Novel power system |
| CN110752655A (en) * | 2019-11-11 | 2020-02-04 | 国网河南省电力公司南阳供电公司 | Hybrid energy storage device for realizing alternating-current constant-voltage charging |
| CN111181230A (en) * | 2020-01-08 | 2020-05-19 | 长沙电牛能源科技有限公司 | Parallel charging module and direct current screen system applying same |
| CN112311051A (en) * | 2020-10-19 | 2021-02-02 | 石家庄通合电子科技股份有限公司 | Control method and control device for power battery and terminal |
| CN112636613A (en) * | 2020-12-16 | 2021-04-09 | 矽力杰半导体技术(杭州)有限公司 | AC-DC conversion circuit |
| CN113574766A (en) * | 2019-03-25 | 2021-10-29 | 瓦尔达微电池有限责任公司 | Modular device for supplying power |
| CN116488322A (en) * | 2023-06-25 | 2023-07-25 | 中铁电气化铁路运营管理有限公司 | Parallel low-voltage high-current output direct-current power supply device and control method |
| US11722070B2 (en) | 2020-12-16 | 2023-08-08 | Silergy Semiconductor Technology (Hangzhou) Ltd | Alternating current to direct current conversion circuit |
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| CN108988454B (en) * | 2018-08-01 | 2024-04-02 | 天津津电供电设计所有限公司 | Energy storage type bus circuit structure and direct-current power supply system |
| CN108988454A (en) * | 2018-08-01 | 2018-12-11 | 天津津电供电设计所有限公司 | Energy storage type bus circuit structure and DC power system |
| CN113574766A (en) * | 2019-03-25 | 2021-10-29 | 瓦尔达微电池有限责任公司 | Modular device for supplying power |
| CN110182103A (en) * | 2019-06-26 | 2019-08-30 | 上海海得控制系统股份有限公司 | A kind of Novel power system |
| CN110752655A (en) * | 2019-11-11 | 2020-02-04 | 国网河南省电力公司南阳供电公司 | Hybrid energy storage device for realizing alternating-current constant-voltage charging |
| CN111181230A (en) * | 2020-01-08 | 2020-05-19 | 长沙电牛能源科技有限公司 | Parallel charging module and direct current screen system applying same |
| CN112311051A (en) * | 2020-10-19 | 2021-02-02 | 石家庄通合电子科技股份有限公司 | Control method and control device for power battery and terminal |
| CN112636613A (en) * | 2020-12-16 | 2021-04-09 | 矽力杰半导体技术(杭州)有限公司 | AC-DC conversion circuit |
| US11722070B2 (en) | 2020-12-16 | 2023-08-08 | Silergy Semiconductor Technology (Hangzhou) Ltd | Alternating current to direct current conversion circuit |
| US11728725B2 (en) | 2020-12-16 | 2023-08-15 | Silergy Semiconductor Technology (Hangzhou) Ltd | Alternating current to direct current conversion circuit |
| CN116488322B (en) * | 2023-06-25 | 2023-09-12 | 中铁电气化铁路运营管理有限公司 | Parallel low-voltage high-current output direct-current power supply device and control method |
| CN116488322A (en) * | 2023-06-25 | 2023-07-25 | 中铁电气化铁路运营管理有限公司 | Parallel low-voltage high-current output direct-current power supply device and control method |
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