CN107370201A - DC power system based on battery connection in series-parallel combination - Google Patents
DC power system based on battery connection in series-parallel combination Download PDFInfo
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- CN107370201A CN107370201A CN201710537421.1A CN201710537421A CN107370201A CN 107370201 A CN107370201 A CN 107370201A CN 201710537421 A CN201710537421 A CN 201710537421A CN 107370201 A CN107370201 A CN 107370201A
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- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000012544 monitoring process Methods 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims 5
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of DC power system based on battery connection in series-parallel combination, including AC distribution device, supervising device, power inverter, anti-reverse device and cell batteries；The cell batteries include the cell batteries of concatenation type and the cell batteries of equivalent parallel formula；The cell batteries are connection in series-parallel combinations, and the cell batteries of the concatenation type are physically serially connected, for providing great dash current in heavy load input or branch, short-circuit；The cell batteries of the concatenation type are simultaneously indirectly in parallel further through power inverter so that the coherence request of battery is reduced, and can realize the discharge and recharge of single battery.Beneficial effects of the present invention：Power supply reliability is high；Voltage Drop is prevented by the cell batteries of concatenation type；It is easily achieved the equalizaing charge of battery in system；Supervising device can realize the interaction of dc bus and charging strategy, the equal mobility height of output current of power inverter.
Description
Technical field
It is high more particularly, to a kind of power supply reliability the present invention relates to supply of electric power and battery applications field, Neng Goujie
Discharge load cost is saved, realizes effective use of energy, it is relatively low to coherence request between cell batteries, it is easy to accomplish system
The equalizaing charge of interior battery, the low DC power system based on battery connection in series-parallel combination of overall cost.
Background technology
Traditional integral electrical DC power system solves former secondary power supply configuration confusion, Decentralization, compatibility
The shortcomings of poor.But batteries are by AC/DC convertor（AC/DC modules）Unified charging, thus the model to battery, capacity,
The performance parameter coherence request such as useful life is very high, it is difficult to the equalizaing charge of battery is realized, simultaneously because dc bus
Place only has two kinds of power supply modes, AC/DC convertor and battery, and comparatively reliability is not too high.
The electric power integrated power supply of New Generation of Intelligent progressively starts to promote in China, compared to traditional integrated power supply system
System, it is by switch power module that batteries are indirectly in parallel that it changes batteries tandem working mode, therefore with straight
Streaming system reliability is higher, easy to maintenance, the advantages that economizing on resources, be environment-friendly, intelligence degree is high.But due to battery
It is not connected at dc bus, it has following Railway Project：（1）When loading dynamic hop, at dc bus voltage exist compared with
Great fluctuation process；（2）During branch, short-circuit, DC bus-bar voltage will cause whole straight-flow system to have a power failure because being supported without enough energy.
Chinese patent notification number is CN102214945A, on October 12nd, 2011, discloses one kind and is based on battery simultaneously
The DC power system of connection, including Alternating Current Unit, Alternating Current Unit connect multiple converters, connected on each converter
It is connected to battery；Multiple converters are connected to Direct Current Distribution Unit, the connection of Direct Current Distribution Unit output end through system dc bus
Load；Also include the operation conditions of detection Alternating Current Unit and converter is controlled and to host computer report according to operation conditions
Accuse the monitoring unit of the operation conditions；The alternating current that Alternating Current Unit exports is changed into high voltage direct current by converter, and
During Alternating Current Unit normal operation, charge a battery, through Direct Current Distribution Unit powering load, or in AC distribution list
When member is abnormal, the energy powering load of accumulators store is utilized.The present invention is stored monomer low pressure using high-frequency converter technology
Battery is converted to required direct voltage output, and all batteries are mutually isolated in system, so as to realize battery it is unrestricted simultaneously
Connection expands power system capacity.But its weak point is：The reliability of the system is relatively low, can not provide temporary impact electric current, Er Qiewu
Method prevents DC bus-bar voltage during branch, short-circuit from falling.
The content of the invention
The present invention in order to overcome in the prior art power supply reliability it is relatively low, uniformity of storage batteries requires high, can not provide wink
When dash current, the deficiency that can not prevent DC bus-bar voltage during branch, short-circuit from falling, it is proposed that a kind of power supply reliability is high,
Discharge load cost can be saved, realizes effective use of energy, it is relatively low to coherence request between cell batteries, it is easy to real
The equalizaing charge of battery in existing system, the low DC power system based on battery connection in series-parallel combination of overall cost.
To achieve these goals, the present invention uses following technical scheme：
A kind of DC power system based on battery connection in series-parallel combination, including AC distribution device, supervising device, power conversion
Device, anti-reverse device and cell batteries；The cell batteries include the cell batteries of concatenation type and the list of equivalent parallel formula
Accumulator body；The AC distribution device electrically connects with supervising device and power inverter respectively；The power inverter difference
The cell batteries and supervising device of cell batteries, equivalent parallel formula with concatenation type electrically connect；The end of anti-reverse device one is connected to
The anode of the cell batteries of concatenation type, another positive terminal for being terminated at dc bus；
The cell batteries are connection in series-parallel combinations, and the cell batteries of the concatenation type are physically serially connected,
For heavy load input or branch, short-circuit when great dash current is provided；The cell batteries of the concatenation type are simultaneously
It is indirectly in parallel further through power inverter so that the coherence request of battery is reduced, and filling for single battery can be realized
Electric discharge.
The supervising device, the working condition of working condition, power inverter for the part to AC distribution device
It is monitored with the voltage condition of dc bus；
The power inverter, for realizing ac bus voltage to DC bus-bar voltage simultaneously, ac bus voltage is to monomer
Battery tension, conversion of the cell batteries voltage to DC bus-bar voltage.
The DC power system of the present invention is combined based on battery connection in series-parallel, and voltage is realized by power inverter
Conversion；It is female to the working condition of the part of AC distribution device, the working condition of power inverter and direct current by supervising device
The voltage condition of line is monitored.
Preferably, power inverter includes electromagnetic interface filter, ac-dc conversion module, energy can bi-directional battery
Charge-discharge modules and counnter attack diode；One end of the ac-dc conversion module electrically connects with one end of electromagnetic interface filter, alternating current-direct current
The other end of conversion module electrically connects with one end of battery charging and discharging module and one end of counnter attack diode respectively；The EMI filters
With exchanging input electrical connection, one end and one end of counnter attack diode of the battery charging and discharging module are electrically connected the other end of ripple device
Connect, the other end of battery charging and discharging module electrically connects with cell batteries；The other end of counnter attack diode is electrically connected with dc bus
Connect；
The electromagnetic interface filter, for solving the electromagnetic compatibility problem of power converter；
The battery charging and discharging module, for realizing the discharge and recharge of cell batteries；
The counnter attack diode, for preventing DC bus current from, to battery and the reverse flow of ac-dc conversion module, realizing
The reliable parallel connection of multiple power inverters.
Preferably, supervising device includes exchange monitoring unit, for being sampled to ac bus, more input AC sources
And monitoring；The exchange monitoring unit electrically connects with AC distribution device.
Preferably, supervising device also includes power conversion modules administrative unit, for realizing the core to power inverter
Hold the control of instruction, start stop operation, discharge and recharge strategy, temperature-compensating, online battery maintenance or replacing, while can set each
Output voltage, current stabilization electric current and the power limit of power inverter；The conversion module administrative unit and each power conversion
Device electrically connects.
Preferably, supervising device also includes communication subelement, for being communicated with the main monitoring in backstage, receive and perform
The instruction of main monitoring transmission from the background, it is main that the operational factor, warning message and historical record of DC power system are uploaded to backstage
Monitoring.
Preferably, supervising device also includes dc bus detection unit, for the output dc bus class of insulation and
The signal of the exchange amount of sealing in is monitored, while detects the voltage and current of dc bus；The dc bus detection unit with
Dc bus electrically connects.
Preferably, supervising device also includes display and setting unit, for being shown to operational factor, provide simultaneously
The setting interface of the live method of operation and sound and light alarm.
Preferably, the part of AC distribution device includes breaker, earth leakage protective device and lightning protection device, the breaker,
Earth leakage protective device and lightning protection device electrically connect with supervising device.
Therefore, the present invention has the advantages that：（1）The present invention inputs distribution, power inverter, battery from exchange
String and combine and multiple links such as system configuration improve the reliability of power supply；（2）Prevent that direct current is female by series battery
Voltage Drop of the line when big capacity load input, branch, short-circuit；（3）The intelligent control of cell batteries realizes electric power storage
Pond periodically or non-periodically line core hold, automatically line core hold and activation reduce human cost, while the electricity in battery
Amount is supplied directly to dc bus load, saves discharge load cost, realizes effective use of energy；（4）Power conversion
Device is indirectly in parallel by multiple batteries, between cell batteries the consistency of performance such as capacity, model, service life requirement compared with
It is low；（5）The charging strategy of cell batteries is formulated with discharge condition by corresponding power inverter, it is easy to accomplish electric power storage in system
The equalizaing charge in pond；（6）Supervising device can realize the interaction of dc bus and charging strategy, and the output current of power inverter is equal
Mobility is high；（7）The present invention reduces expenditure in the links such as system Construction and system administration so that overall cost reduces.
Brief description of the drawings
Fig. 1 is a kind of system block diagram of the present invention；
Fig. 2 is the operating diagram of the cell batteries of the tandem of the present invention；
Fig. 3 is a kind of cut-away view of the power inverter of the present invention；
Fig. 4 is a kind of cut-away view of the supervising device of the present invention.
In figure：AC distribution device 1, supervising device 2, power inverter 3, anti-reverse device 4 and cell batteries 5, backstage
Main monitoring 6, exchange monitoring unit 21, power conversion modules administrative unit 22, communication subelement 23, dc bus detection unit
24th, display and setting unit 25, electromagnetic interface filter 31, ac-dc conversion module 32, battery charging and discharging module 33, counnter attack diode
34th, the cell batteries 51 of concatenation type, the cell batteries 52 of equivalent parallel formula.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of DC power system based on battery connection in series-parallel combination, including exchanges and match somebody with somebody
Electric installation 1, supervising device 2, power inverter 3, anti-reverse device 4 and cell batteries 5；The AC distribution device is handed over multichannel
Stream input preferably and be automatically switched fast, and forms the ac bus of more reliable power supply, and realizes data with supervising device
Exchange, the display of input operational factor and the inquiry and upload of power supply state are exchanged to realize.The supervising device is matched somebody with somebody with exchanging
Electric installation realizes data exchange；Supervising device realizes data exchange with power inverter, to realize the fortune to each power inverter
Row parameter is configured and inquired about, such as to formulating the charging strategy of battery, core capacitance type, the voltage setting of dc bus
Deng.As shown in Fig. 2 power inverter obtains energy at ac bus, through internal electromagnetic interface filter 31, ac-dc conversion module
32 and counnter attack diode 34 after be connected with dc bus, to DC bus powered；Power inverter obtains energy at ac bus
Amount, after internal electromagnetic interface filter, ac-dc conversion module and battery charging and discharging module 33, is connected, to monomer with cell batteries
Battery charges；Power inverter obtains energy at cell batteries, through internal cell charge-discharge modules and counnter attack diode
Afterwards, energy is provided to dc bus.Cell batteries are divided into two kinds of application forms, the list of concatenation type in this DC power system
Accumulator body 51 and the cell batteries of equivalent parallel formula 52.The end of cell batteries one of concatenation type is connected to power inverter, can
Charged, can also be discharged from power inverter to dc bus, while the cell batteries of concatenation type are gone here and there successively by power inverter
After connecing, anti-reverse device is just terminated at, negative terminal is connected to dc bus negative pole, therefore in exchange dead electricity, power inverter damage, great Rong
When amount load input and branch, short-circuit, it is too low that the cell batteries of concatenation type can suppress DC bus-bar voltage, it is possible to provide
Great dash current, without installing Voltage Drop restraining device additional at dc bus, without the single power conversion of raising
The instantaneous load capacity of device.The end of cell batteries one of equivalent parallel formula is connected to power inverter, can be charged by power inverter,
Also can be discharged from power inverter to dc bus.The end of anti-reverse device one is connected to the anode of the cell batteries of concatenation type, another
The positive terminal of dc bus is terminated at, for preventing electric current from reversely flowing into cell batteries from dc bus, is otherwise likely to form
Circulation.
As shown in Fig. 2 the cell batteries of concatenation type while are physically located on the one hand by power inverter equivalent parallel
It is best occupation mode in series connection.In the case of circuit 1 or circuit 2 are individually broken, cell batteries BATb1,
BATb2 ... BATbn can be to DC bus powered.
As shown in figure 3, power inverter includes electromagnetic interface filter, ac-dc conversion module, energy can bi-directional battery
Charge-discharge modules and counnter attack diode；The input of electromagnetic interface filter is terminated at exchange input, and the output of electromagnetic interface filter is terminated at friendship
DC converting module, solves the electromagnetic compatibility problem of power inverter.The input of ac-dc conversion module is terminated at EMI filtering
Device, the output end of ac-dc conversion module are connected to battery charging and discharging module and counnter attack diode simultaneously, pass through battery charging and discharging mould
Block charges to cell batteries, while by counnter attack diode to DC bus powered.One end of battery charging and discharging module is connected to
Ac-dc conversion module and counnter attack diode, the another of battery charging and discharging module are terminated at cell batteries, realize monomer electric power storage
The discharge and recharge in pond.One end of counnter attack diode is connected to output and the battery charging and discharging module of AC/DC convertor, counnter attack diode
It is another be terminated at dc bus, to prevent DC bus current to battery and the reverse flow of ac-dc conversion module, realize
The reliable parallel connection of multiple power inverters.
As shown in figure 4, supervising device includes exchange monitoring unit 21, power conversion modules administrative unit 22, communicator list
Member 23, dc bus detection unit 24 and display and setting unit 25；Monitoring unit is exchanged to ac bus, more input AC sources
Sampled and monitored.Power conversion modules administrative unit communicates with power conversion modules, realizes the control to power conversion modules
System, including core hold instruction, start stop operation, discharge and recharge strategy, temperature-compensating, online battery maintenance or replacing etc., while can set
Output voltage, current stabilization electric current and power limit of each power conversion unit etc..Dc bus detection unit is to exporting dc bus
The class of insulation is monitored with the signals such as the amount of sealing in are exchanged, while detects the physical quantitys such as the voltage of dc bus, electric current.Communicator
Unit communicates with the main monitoring 6 in backstage, receives and performs the instruction transmitted by background monitoring, the operation of DC power system is joined
Number, protection, warning information, historical record etc. are uploaded to main monitoring.Display is shown with setting unit to operational factor, there is provided
Sound and light alarm, while the setting interface of the live method of operation is provided.
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (8)
1. a kind of DC power system based on battery connection in series-parallel combination, it is characterized in that, including AC distribution device（1）, prison
Control device（2）, power inverter（3）, anti-reverse device（4）And cell batteries（5）；The cell batteries include concatenation type
Cell batteries（51）With the cell batteries of equivalent parallel formula（52）；The AC distribution device respectively with supervising device and work(
Rate converter electrically connects；The power inverter cell batteries with concatenation type, the cell batteries of equivalent parallel formula respectively
Electrically connected with supervising device；The end of anti-reverse device one is connected to the anode of the cell batteries of concatenation type, another to be terminated at dc bus
Positive terminal；
The cell batteries are connection in series-parallel combinations, and the cell batteries of the concatenation type are physically serially connected,
For heavy load input or branch, short-circuit when great dash current is provided；The cell batteries of the concatenation type are simultaneously
It is indirectly in parallel further through power inverter so that the coherence request of battery is reduced, and filling for single battery can be realized
Electric discharge；
The supervising device, the working condition of working condition, power inverter for the part to AC distribution device and straight
The voltage condition of stream bus is monitored；
The power inverter, for realizing ac bus voltage to DC bus-bar voltage simultaneously, ac bus voltage is to monomer
Battery tension, conversion of the cell batteries voltage to DC bus-bar voltage.
2. the DC power system according to claim 1 based on battery connection in series-parallel combination, it is characterized in that, the power
Converter includes electromagnetic interface filter（31）, ac-dc conversion module（32）, energy can bi-directional battery charging and discharging module（33）
With counnter attack diode（34）；One end of the ac-dc conversion module electrically connects with one end of electromagnetic interface filter, ac-dc conversion mould
The other end of block electrically connects with one end of battery charging and discharging module and one end of counnter attack diode respectively；The electromagnetic interface filter
The other end electrically connects with exchanging input electrical connection, one end of the battery charging and discharging module with one end of counnter attack diode, battery
The other end of charge-discharge modules electrically connects with cell batteries；The other end of counnter attack diode electrically connects with dc bus；
The electromagnetic interface filter, for solving the electromagnetic compatibility problem of power converter；
The battery charging and discharging module, for realizing the discharge and recharge of cell batteries；
The counnter attack diode, for preventing DC bus current from, to battery and the reverse flow of ac-dc conversion module, realizing
The reliable parallel connection of multiple power inverters.
3. the DC power system according to claim 1 based on battery connection in series-parallel combination, it is characterized in that, the monitoring
Device includes exchange monitoring unit（21）, for ac bus, more input AC sources to be sampled and monitored；The exchange prison
Control unit electrically connects with AC distribution device.
4. the DC power system according to claim 3 based on battery connection in series-parallel combination, it is characterized in that, the monitoring
Device also includes power conversion modules administrative unit（22）, for realizing core appearance instruction, start stop operation to power inverter, filling
Electric discharge strategy, temperature-compensating, online battery maintenance or the control of replacing, while the output electricity of each power inverter can be set
Pressure, current stabilization electric current and power limit；The conversion module administrative unit electrically connects with each power inverter.
5. the DC power system according to claim 3 based on battery connection in series-parallel combination, it is characterized in that, the monitoring
Device also includes communication subelement（23）, for the main monitoring in backstage（6）Communicated, receive and perform the main monitoring transmission in backstage
Instruction, the operational factor, warning message and historical record of DC power system are uploaded to the main monitoring in backstage.
6. the DC power system according to claim 3 based on battery connection in series-parallel combination, it is characterized in that, the monitoring
Device also includes dc bus detection unit（24）, for entering to the output dc bus class of insulation with the signal for exchanging the amount of sealing in
Row monitoring, while detect the voltage and current of dc bus；The dc bus detection unit electrically connects with dc bus.
7. the DC power system according to claim 3 based on battery connection in series-parallel combination, it is characterized in that, the monitoring
Device also includes display and setting unit（25）, for being shown to operational factor, while provide setting for the live method of operation
Put interface and sound and light alarm.
8. the dc source system based on battery connection in series-parallel combination according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7
System, it is characterized in that, the part of AC distribution device includes breaker, earth leakage protective device and lightning protection device, and the breaker, electric leakage are protected
Shield device and lightning protection device electrically connect with supervising device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710537421.1A CN107370201B (en) | 2017-06-29 | 2017-06-29 | Direct-current power supply system based on storage battery series-parallel combination |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710537421.1A CN107370201B (en) | 2017-06-29 | 2017-06-29 | Direct-current power supply system based on storage battery series-parallel combination |
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| CN107370201A true CN107370201A (en) | 2017-11-21 |
| CN107370201B CN107370201B (en) | 2019-12-31 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109546714A (en) * | 2018-12-29 | 2019-03-29 | 广州泓淮能源科技有限公司 | A kind of open air powered base station accumulator management device and method |
| CN110556848A (en) * | 2018-06-04 | 2019-12-10 | 周锡卫 | BMS and energy storage system based on battery pack string regulation and control |
| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN111033938A (en) * | 2018-01-30 | 2020-04-17 | 松下知识产权经营株式会社 | Power supply system for vehicle and management device |
| CN112655145A (en) * | 2018-11-19 | 2021-04-13 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply unit and supersound platform truck |
| CN113341231A (en) * | 2021-05-26 | 2021-09-03 | 合肥同智机电控制技术有限公司 | High-voltage direct-current bus distributed capacitance detection protection method |
| CN113572183A (en) * | 2021-07-20 | 2021-10-29 | 许继电源有限公司 | Intelligent maintenance circuit and maintenance method for station storage battery |
| CN113659668A (en) * | 2021-08-11 | 2021-11-16 | 广东电网有限责任公司 | Battery discharge loop, control system and control method of electrochemical energy storage power station |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111033938A (en) * | 2018-01-30 | 2020-04-17 | 松下知识产权经营株式会社 | Power supply system for vehicle and management device |
| CN110556848A (en) * | 2018-06-04 | 2019-12-10 | 周锡卫 | BMS and energy storage system based on battery pack string regulation and control |
| CN112655145A (en) * | 2018-11-19 | 2021-04-13 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply unit and supersound platform truck |
| CN112655145B (en) * | 2018-11-19 | 2023-12-05 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply device and ultrasonic trolley |
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| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN113341231A (en) * | 2021-05-26 | 2021-09-03 | 合肥同智机电控制技术有限公司 | High-voltage direct-current bus distributed capacitance detection protection method |
| CN113572183A (en) * | 2021-07-20 | 2021-10-29 | 许继电源有限公司 | Intelligent maintenance circuit and maintenance method for station storage battery |
| CN113659668A (en) * | 2021-08-11 | 2021-11-16 | 广东电网有限责任公司 | Battery discharge loop, control system and control method of electrochemical energy storage power station |
| CN113659668B (en) * | 2021-08-11 | 2023-08-04 | 广东电网有限责任公司 | Electrochemical energy storage power station battery discharge loop, control system and control method |
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| CN107370201B (en) | 2019-12-31 |
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